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Publication numberCN1414900 A
Publication typeApplication
Application numberCN 00817980
PCT numberPCT/US2000/030005
Publication date30 Apr 2003
Filing date31 Oct 2000
Priority date1 Nov 1999
Also published asDE60023332D1, DE60023332T2, DE60023332T3, EP1226018A1, EP1226018B1, EP1226018B2, US6479154, WO2001032403A1
Publication number00817980.8, CN 00817980, CN 1414900 A, CN 1414900A, CN-A-1414900, CN00817980, CN00817980.8, CN1414900 A, CN1414900A, PCT/2000/30005, PCT/US/0/030005, PCT/US/0/30005, PCT/US/2000/030005, PCT/US/2000/30005, PCT/US0/030005, PCT/US0/30005, PCT/US0030005, PCT/US030005, PCT/US2000/030005, PCT/US2000/30005, PCT/US2000030005, PCT/US200030005
InventorsGA瓦尔顿, SE肖弗, JR小菲茨, JR雷维斯, RM沙尼, DG乌伊滕布雷克
Applicant金伯利-克拉克环球有限公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Coextruded elastomeric breathable films and process for making same
CN 1414900 A
Abstract  translated from Chinese
一种透气弹性多层膜,它包含一层由第一弹性体与至少一种填料构成的芯层和至少一层由第二弹性体构成的皮层;其中,所述第一弹性体是聚烯烃,所述第二弹性体选自热塑性聚氨酯、聚醚酰胺、嵌段共聚物,以及它们的组合物。 A breathable elastic multilayer film comprising a layer of a first elastomeric core layer and the skin layer at least one layer formed by a second elastic body formed with at least one filler; wherein, said first elastomer is a polyolefin , the second elastomer is selected from thermoplastic polyurethane, polyether amide, block copolymers, and combinations thereof. 或者,在多层膜上还可以粘结上至少一层支持层。 Alternatively, the multilayer film can also be bonded on at least one support layer.
Claims(26)  translated from Chinese
1.一种生产弹性透气多层薄膜的方法,它包括下列步骤:a)使高性能弹性体共混,以形成至少一种皮层共混物;b)使低性能弹性体与填料共混和复合(compounding),以形成一种芯层共混物;c)使所述皮层共混物与所述芯层共混物共挤出,以形成含有芯层和至少一层皮层的多层薄膜,该薄膜的原始长度为1倍;d)将所述多层薄膜拉薄到3.0-5.5倍,在所述芯层中形成许多微孔;e)使所述多层薄膜回缩,从而使所述拉薄的薄膜的最终长度为3.0-5.0倍。 1. A breathable elastic multilayer film production method, comprising the steps of: a) high-performance elastomer blends to form at least one skin layer blend; b) of the low performance elastomer and filler blends and composite (compounding), to form a core layer blend; c) so that the skin layer and the core layer blend blend coextruded to form a multilayer film comprising a core layer and at least one skin layer, The original length of the film was 1 times; d) pulling said thin multilayer film to 3.0 to 5.5 times, forming a plurality of micropores in the core layer; e) retracting said multilayer film, so that the final length of said thin film is pulled 3.0-5.0 times.
2.权利要求1的方法,其中所述共挤出步骤在所述芯层的正反两面上形成两层皮层。 The method of claim 1, wherein said step of forming a two-layer coextruded skin layer on both sides of the core layer.
3.权利要求1的方法,其中所述一层或多层皮层中的高性能弹性体选自嵌段共聚物、热塑性聚氨酯和聚醚酰胺。 The method of claim 1, wherein said one or more layers of the cortex high performance elastomer is selected from block copolymers, thermoplastic polyurethanes and polyether amides.
4.权利要求3的方法,其中所述一层或多层皮层中的高性能弹性体选自热塑性聚氨酯和聚醚酰胺。 The method of claim 3, wherein said one or more layers of the cortex high performance elastomer is selected from thermoplastic polyurethanes and polyether amides.
5.权利要求4的方法,其中将所述高性能弹性体与乙烯/丙烯酸甲酯进行共混。 The method of claim 4, wherein said high performance elastomer and ethylene / methyl acrylate were blended.
6.权利要求1的方法,其中所述低性能弹性体是聚烯烃。 The method of claim 1, wherein the low performance elastomer is a polyolefin.
7.权利要求6的方法,其中所述低性能弹性体是聚乙烯。 The method of claim 6, wherein the low performance elastomer is a polyethylene.
8.权利要求1的方法,其中在步骤b)中将一种高性能弹性体与所述低性能弹性体和填料进行共混。 The method of claim 1, wherein in step b) a high performance elastomer and the low performance elastomer and filler were blended.
9.权利要求1的方法,其中在步骤a)中将所述高性能弹性体与增容剂共混。 The method of claim 1, wherein in step a) will be at the high performance elastomer and compatibilizer blended.
10.权利要求1的方法,其中在步骤a)中将防粘剂与所述高性能弹性体共混。 10. The method of claim 1, wherein in step a) in the release agent with the high-performance elastomer blends.
11.权利要求1的方法,其中在步骤e)中所述回缩多层膜的厚度为0.6-1.2mm,所述皮层的总厚度不超过薄膜总厚度的3%。 11. The method of claim 1, wherein in step e) the multilayer film having a thickness of retraction 0.6-1.2mm, the total thickness of the skin layer does not exceed 3% of the total film thickness.
12.权利要求1的方法,还包括在所述多层膜上粘结一层支持层的步骤。 The method of claim 1, further comprising a layer of the multilayer adhesive film supporting layer step.
13.由权利要求1的方法制成的薄膜。 13. A film made by the method of claim.
14.一种透气弹性多层膜,它包含:包含第一弹性体和至少一种填料的芯层;至少一层包括第二弹性体的皮层,其中所述多层弹性膜表现的水蒸汽透过率大于1,000g/m2/24小时。 14. A breathable elastic multilayer film comprising: a first elastomeric core layer and at least one filler; second skin layer comprising at least one elastomer, wherein the multilayer elastic film is water vapor permeable performance had greater than 1,000g / m2 / 24 hr.
15.权利要求14的透气弹性多层膜,其中所述第一弹性体是一种低性能弹性体,所述第二弹性体是一种高性能弹性体。 Breathable elastic multilayer film of claim 14, wherein said first elastomer is a low performance elastomer, the second elastomer is a high performance elastomer.
16.权利要求15的透气弹性多层膜,其中所述高性能弹性体的滞后值小于60%。 Breathable elastic multilayer film of claim 15, wherein said high performance elastomer lag value is less than 60%.
17.权利要求14的透气弹性多层膜,其中所述第一弹性体包含聚烯烃,所述第二弹性体选自热塑性聚氨酯、聚醚酰胺和嵌段共聚物,以及它们的组合。 Breathable elastic multilayer film of claim 14, wherein said first elastomer comprises a polyolefin and said second elastomer is selected from thermoplastic polyurethane, and polyether block amide copolymers, and combinations thereof.
18.权利要求17的透气弹性多层膜,其中所述膜包括在所述芯层正反两面上的两个皮层。 Breathable elastic multilayer film of claim 17, wherein the film comprises two skin on both sides of the core layer.
19.权利要求17的透气弹性多层膜,其中所述一层或多层皮层还包含乙烯/丙烯酸甲酯共聚物。 Breathable elastic multilayer film of claim 17, wherein said skin layer further comprises one or more layers of ethylene / methyl acrylate copolymer.
20.权利要求17的透气弹性多层膜,其中所述第一弹性体是聚乙烯。 Breathable elastic multilayer film of claim 17, wherein said first elastomer is a polyethylene.
21.权利要求17的透气弹性多层膜,其中所述芯层包含一种与所述第一弹性体共混的高性能弹性体。 Breathable elastic multilayer film of claim 17, wherein said core layer comprises a first elastic body and the high-performance elastomer blend.
22.权利要求17的透气弹性多层膜,其中所述一层或多层皮层包含增容剂。 Breathable elastic multilayer film of claim 17, wherein the skin layer or layers comprise a compatibilizer.
23.权利要求17的透气弹性多层膜,其中在所述一层或多层皮层中共混有防粘剂。 Breathable elastic multilayer film of claim 17 of 23., wherein said one or more layers have a releasing agent blended in the skin layer.
24.权利要求17的透气弹性多层膜,其中所述膜的厚度为约0.6-1.2mm,所述一层或多层皮层总厚度为该膜总厚度的约3%。 Breathable elastic multilayer film 17 of claim 12 wherein the thickness of the film is about 0.6-1.2mm, the skin layer or layers for a total thickness of about 3% of the total film thickness.
25.一种透气层合材料,它包含:一层弹性多层膜,它包含一层第一弹性体与至少一种填料的芯层和至少一层第二弹性体的皮层;其中所述第一弹性体是聚烯烃,所述第二弹性体选自热塑性聚氨酯、聚醚酰胺、嵌段共聚物,以及它们的组合;至少一层粘结在所述多层膜上的支持层。 25. A breathable laminate, comprising: an elastic layer of a multilayer film comprising a layer of a first elastomeric core layer and at least one filler and at least one second elastomeric skin layer; wherein said first an elastomer is a polyolefin and said second elastomer is selected from thermoplastic polyurethane, polyether amide, block copolymers, and combinations thereof; at least one layer of the multilayer film adhered to a support layer.
26.一种包括权利要求25的透气层合材料的个人护理吸收制品。 26. A method as claimed in claim 25 including the breathable laminate material of a personal care absorbent article.
Description  translated from Chinese
共挤出弹性体透气膜及其制备方法 Coextruded elastomeric breathable membrane and its preparation method

发明领域本发明涉及用于舒适衣服和个人护理品中的共挤出弹性体透气膜。 Field of the Invention The present invention relates to a comfortable clothing and personal care products coextruded elastomeric breathable film. 更具体地说,本发明涉及与织物一起用于一次性衣服和个人护理品的多层膜和膜层合材料。 More particularly, the present invention relates to disposable garments and fabric together for personal care products and the film was laminated multilayer film materials.

发明背景本发明涉及多层薄膜及它们在由这种薄膜制造的层合材料与制品中的用途。 BACKGROUND OF THE INVENTION The present invention relates to multilayer films and their use in the manufacture of such a film laminated material Products. 膜层合材料已成为重要的商品,获得了广泛的应用,包括用于各种制品中;例如,作尿布、训练裤、失禁服、妇女卫生用品之类个人护理品的外覆盖层。 Film laminate material has become an important commodity, gained wide applications, including a variety of products; for example, the outer cover layer for diapers, training pants, incontinence wear, feminine hygiene products like personal care products. 此外,膜层合材料已用于许多其它人体制品中,如衣服、手术服、保护性工作服、包扎、绷带等。 In addition, the film composite materials have been used in many other human products, such as clothing, surgical gowns, protective clothing, bandage, bandages. 这种膜能使制品具有所需的阻隔性能,同时与之层合的其它材料能提供其它所需特性,如耐磨性和/或良好的手感。 This film enables the article having the desired barrier properties, while other materials laminated thereto can provide additional desired characteristics, such as abrasion resistance and / or good hand. 此外,为了提高穿戴者的舒适性,希望膜层合材料是“透气的”,其意是指层合材料起阻隔液体的作用,但又允许水蒸汽和空气透过。 In order to improve the wearer's comfort, it is desirable film was laminated material is "breathable", which is intended to refer to a laminate from a liquid barrier effect, but allows water vapor and air through. 通过实现和保持高透气性,有可能使制品穿着起来更舒适,因为水蒸汽透过织物的迁移有助于减少和/或限制因皮肤上集结过量的湿气而带来的不舒适性。 By achieving and maintaining high breathability, it is possible to make the product more comfortable to wear, since the migration of water vapor through the fabric helps to reduce and / or limit due to excess moisture build-up on the skin brought discomfort. 所以,这样的制品可全面提高皮肤的舒适性。 Therefore, such products can improve the skin's overall comfort. 因此,常常希望在制品中使用一种薄膜以达到所希望的舒适性。 Therefore, it is often desirable to use a thin film in the product to achieve the desired comfort. 为此,已将薄膜设计成满足特定的要求。 To this end, the film has been designed to meet specific requirements.

例如,虽然本领域内已知有很多种膜层合材料,但一种特别有用的层合材料使用了一种包含一种拉伸填充多层(与单层膜相反)微孔膜的透气阻隔层。 For example, although there are many known in the art film was laminated materials, but a particularly useful laminate uses a multi-layer comprising a stretched filled (with a monolayer film opposite) The breathable microporous film barrier layers. 这种膜一般都包含一个较厚且通常较贵(基于使用较大量便宜的材料)的占膜材料大部分的芯层和较薄的外皮层。 Such films generally include a relatively thick and generally more expensive (based on the use of a larger amount of expensive materials) accounts for most of the film material of the core layer and thin outer skin layer. 所述芯层常填充颗粒或其它物质,然后经挤压或拉伸以形成贯穿全层的细孔网状结构。 Often the core particles or other filler material, and then extruded or stretched to form a pore through the whole layer of mesh structure. 孔是因聚合物与填料颗粒的分离而产生的。 Holes because of separation of the polymer and filler particles generated. 膜-孔网络允许气体和水蒸汽穿透该膜的水平较高,同时又对液体和颗粒物质起阻隔作用。 Film - Hole network allows gas and water vapor through the higher levels of the film, while the liquid and particulate matter from the barrier effect. 控制膜内的填料含量和拉伸程度就可形成一定尺寸和/或尺寸分布的微孔网络,从而赋予织物所需的透气性。 Filler content and the degree of stretching of the film can be formed to control a size and / or pore size distribution of the network, to impart the desired fabric air permeability.

在共同受让McCormack的WO专利申请96/19346中描述了一个拉伸-填充薄膜的典型例子,该专利公开了一种包含透气微孔芯层的多层填充膜,芯层由可挤出热塑性聚合物制成,如聚烯烃,包括其共聚物和/或共混物。 In commonly assigned WO Patent Application 96/19346 of McCormack described a tension - filled films typical example, which discloses a core layer comprising a breathable microporous multilayer film is filled, extrudable thermoplastic core layer by polymers, such as polyolefins, including copolymers and / or blends thereof. 芯层上粘着一层或多层透气多孔皮层。 Adhesive layer or layers of air-permeable porous skin layer on the core layer. McCormack强调使用通用型芯层和专门设计的皮层。 McCormack stressed that the use of general-purpose core and specially designed cortex. 所述皮层包括设计到能赋予整个薄膜以特定性能的可挤出热塑性聚合物和/或添加剂。 The skin layer comprises a design to impart specific properties to the overall film extrudable thermoplastic polymers and / or additives. 在McCormack的参考文献中,皮层聚合物的选择取决于薄膜所需的全面特性。 In McCormack references, select cortex polymer depends on the desired overall properties of the film. 文中叙述了可能的皮层聚合物,包括聚烯烃的均聚物、共聚物和共混物以及乙烯/醋酸乙烯酯(EVA)、乙烯/丙烯酸乙酯(EEA)、乙烯/丙烯酸(EAA)、乙烯/丙烯酸甲酯(EMA)、乙烯/丙烯酸丁酯(EBA)、聚酯(PET)、尼龙、乙烯/乙烯醇(EVOH)、聚苯乙烯、聚氨酯和烯烃类热塑性弹性体。 This paper describes the possible cortical polymer, including polyolefin homopolymers, copolymers and blends thereof, and ethylene / vinyl acetate (EVA), ethylene / ethyl acrylate (EEA), ethylene / acrylic acid (EAA), ethylene / methyl acrylate (EMA), ethylene / butyl acrylate (EBA), polyester (PET), nylon, ethylene / vinyl alcohol (EVOH), polystyrene, polyurethanes and olefinic thermoplastic elastomer. 此外,McCormack还描述了使用防粘(anti-block)材料以提高加工性能和/或防止不希望发生的层的粘连。 In addition, McCormack also describes the use of release (anti-block) materials to improve processability and / or to prevent undesirable blocking layer. McCormack的颗粒填充薄膜能通过拉伸获得透气性。 McCormack particle packing film obtained by stretching breathability. 然后可将这种拉伸薄膜层合到无纺织物上形成层合材料,这种层合材料同时利用了无纺织物的强度与整体性以及拉伸薄膜的阻隔性能。 This stretched film may then be laminated to the laminate material forming the nonwoven fabric, which laminate barrier properties while taking advantage of the strength and integrity of the non-woven fabric and the stretched film. McCormack的参考文献并未提出采用高性能弹性体,而仍在低成本下获得较高的透气性。 McCormack The reference does not propose the use of high performance elastomer, and still obtain a higher permeability at low cost.

业已将薄膜设计成带有专门有助于减少口模唇出现积料的皮层,口模唇积料是在薄膜制造过程中填充聚合物挤出时倾向于聚集在挤出机口模处的填料颗粒的残留堆积。 The film has been specially designed to help reduce the die with a lip product material appears cortex, the die lip plot filler material tend to gather in the extruder die at the time of the film manufacturing process filled polymer extrusion accumulation of residual particles. 口模唇上的这种积料会降低制造速度,因为为刮除口模唇处的多余料,需要中断加工。 Die lips this plot material will reduce the manufacturing speed, because the die lip for scraping excess material, you need to interrupt processing. 为了减少填料颗粒的这种堆积,常常使用包括EVA在内的此类皮层。 To reduce the accumulation of the filler particles, often including the use of such skin layer including EVA.

共同受让Shawver等人的WO专利申请99/14262描述了一种透气微孔薄膜,它包含密度低于0.89g/cm3的第一聚乙烯聚合物与密度高于约0.90g/cm3的第二聚乙烯聚合物的热塑性聚合物共混物和一种填料。 Shawver et al, commonly assigned patent application WO 99/14262 describes a breathable microporous film, which contains a density less than 0.89g / cm3 and the density of the first polymer is higher than the second polyethylene of about 0.90g / cm3 of polyethylene polymer blends of thermoplastic polymers and a filler. 尤其是,该参考文献描述了用一种单点/茂金属催化剂聚乙烯作为一种膜组分。 In particular, this reference describes the use of one single-site / metallocene catalyst polyethylene as a membrane fraction. 虽然该膜的特性被描述为具有良好的透气性和身体舒适性,而且受热时不会收缩,但Shawver的参考文献中,既没有描述在薄膜中策略性地放进较高成本的弹性体材料来有助于弥补较低成本的弹性材料的弹性性能,也没有描述使用较高性能的弹性体,而仍然达到了较高的透气性。 Although the characteristics of the film is described as having good air permeability and physical comfort, and does not shrink when heated, but Shawver references, neither described in the films strategically placed higher cost elastomeric material to help compensate for elastic properties of the elastomeric material of low cost, there is no description of the use of high performance elastomer, and still achieve a higher permeability. 虽然这类薄膜表现出弹性性能,但希望薄膜具有比茂金属催化聚乙烯弹性体更好的弹性性能。 Although such films exhibit elastic properties, but I hope the film has a better than metallocene-catalyzed polyethylene elastomer elastic properties.

除了多层薄膜层合材料的透气性之外,层合材料呈现较高性能弹性的能力会使由其制成的衣服具有更好的身体舒适性。 In addition to the multilayer film laminate breathable, laminated elastic material exhibits high performance capability of clothing made therefrom will have a better body comfort. 但是,要提供达到所需舒适性与透气性的低成本多层层合材料是成问题的,特别是用拉伸填充薄膜时。 However, to provide the desired comfort and breathability, low-cost multi-layer laminate material is problematic, particularly with stretched filled film is. 为实现良好的身体舒适性,膜层的聚合物组合物优选具有良好的拉伸和回复性能,而且还必须能允许在加工中形成并保留住微孔。 To achieve good physical comfort, film layer polymer composition preferably has good stretch and recovery properties, but also must be able to retain and allow the formation of micropores in the processing. 这两个目的常常是彼此冲突的。 These two objectives are often conflicting.

例如,授予Krueger等人的美国专利5,691,034描述了一种带精织(microtextured)皮层的多层弹性体层合材料。 For example, U.S. Patent 5,691,034 to Krueger et al., Describes a fine woven belt (microtextured) cortex multilayer elastomeric laminate. 这种多层层合材料由至少一层弹性体层和至少一薄层皮层组成,经共挤出制成。 This multi-layer laminate material comprises at least one elastomeric layer and at least one thin skin layer composition by coextrusion. 该专利说明这种层合材料有3层。 The description of this patent has a three-layer laminate. 共挤出后,将该层合材料拉伸到超过皮层的弹性极限并允许它回复。 After coextrusion, the laminate is stretched to exceed the elastic limit of the skin layer and allowing it to reply. 虽然Krueger的参考文献提出了使用高成本的高性能弹性体材料,但没有提供所述层合材料的透气性。 Although Krueger reference proposes the use of high-cost high performance elastomeric material, but did not provide the laminate breathable. 用较高性能的弹性体特别难以实现透气性,因为这类弹性体在拉伸后会导致孔的闭合。 With elastomeric properties are particularly difficult to achieve high permeability, since such elastomer after stretching will cause the hole is closed. 基本上,由于弹性体材料的回缩性能,拉伸后,使薄膜透气所需的微孔并不总能保持张开。 Basically, due to the properties of the elastomeric material of the retraction, after stretching, the film breathable microporous not always required to maintain open.

解决该问题的一个办法是加入额外的填料以减少材料回缩的趋势,从而使更多的微孔保持张开,从而形成透气产品。 One solution to this problem is to add additional filler material to reduce the tendency retraction, so that more micropores kept open, thereby forming a breathable product. 但是,收缩性的减弱又会在最终产品中产生较高的永久变形,即在拉伸后一定百分比的伸长,当用在会遇到运动的制品中时,会随时间失去合体性或变得松松垮垮(也叫做阻尼)。 However, shrinkage will produce high attenuation permanent deformation in the final product, i.e., a certain percentage after tensile elongation, when used in the article will encounter movement, lose fit or change with time too baggy (also called damping).

也已知在一种多层膜中用5层来实现透气膜。 A multilayer film is also known by the 5-layer breathable membrane to achieve. 这类薄膜通常需要连接层(tie)或粘合层来将各皮层/外层粘结到中心芯层上去。 Such films typically require a connection layer (tie) or an adhesive layer to each skin layer / outer layer bonded to the center core layer up. 业已发现在芯层中用粘合剂组分会增加制造难度,因为在薄膜制造过程中粘合剂常常带来不希望的粘合性。 It has been found in the core layer with the adhesive component will increase the difficulty of manufacturing because the binder in the film manufacturing process often results in undesirable adhesion. 在授予Shida等人的美国专利5,164,258中公开了一种5层薄膜结构。 Discloses a five layer film structure in granting Shida et al., In U.S. Patent No. 5,164,258. Shida公开的多层结构含有一个吸湿气体阻挡层的整体(monolithic)膜芯层和设计到便于芯层中已吸收湿气逸出的内、外表面层。 Within Shida discloses a multilayer structure comprising a gas barrier layer, the overall absorbent (monolithic) film core layer and the core layer has been designed to facilitate the escape of moisture absorption, the outer surface layer. 外层被描述为发泡或填充的,目的是提高它们的水蒸汽透过率(WVTR)。 The outer layer is described as foamed or filled with the aim to increase their water vapor transmission rate (WVTR). Shida等人未描述该多层膜的弹性特性。 The elastic properties of the multilayer film Shida et al did not describe.

此外,在共同受让Forte的WO专利申请97/0495中描述了3层或5层薄膜。 Further, in the commonly assigned WO Patent Application 97/0495 Forte describes three layers or five-layer film. Forte描述了一种多层透气膜和一种制造这种膜的方法。 Forte describes a multilayer breathable film and a method of manufacturing such membranes. 较之所述的3层实施方案更优选的5层膜包括两个粘合剂微孔层,目的是便于各层之间的粘结。 Compared to the three layer embodiments of more preferred 5-layer film comprising two adhesive microporous layer, intended to facilitate bonding between the layers. 为达到所需的透气性或WVTR水平,外层是整体层,多孔芯层是填充层。 To achieve the desired level of breathability or WVTR, the outer layer is a global layer, the porous core is filled layer. Forte在描述带粘合剂层的5层膜时,公开了包括一种含茂金属催化聚乙烯的热塑性聚合物的芯层。 In describing Forte 5-layer film with the adhesive layer, is disclosed comprising a thermoplastic polymer containing a metallocene catalyzed polyethylene of the core layer. Forte还把整体外皮层描述为包含一种亲水聚合物树脂。 Forte also the whole skin layer is described as containing a hydrophilic polymeric resin. 尤其是,Forte描述了某些树脂,特别是Pebax牌聚合物树脂,尤其是Pebax4033树脂,在外五层中的用途。 In particular, Forte describes some resins, especially Pebax brand polymer resins, especially Pebax4033 resin, five out of use.

在Forte的参考文献中所述的3层膜应用了一种微孔粘合剂芯层,粘合剂组分或者含有能粘结各层的聚合物材料,即一种取自于整体外层材料的混合物,或者含有多层膜的碎屑。 Forte said references in three-layer film is applied a microporous adhesive core layer, the adhesive component or adhesive layers can contain the polymeric material, i.e., an outer layer is taken from the whole a mixture of materials, or contain debris multilayers. 该专利中所述的3层实施方案未包括一层独立的外粘合剂层,但利用了一种熔体共混在不相容皮层中的EMA材料来提高皮层与芯层材料间的相容性。 3-layer embodiments described in this patent does not include a separate outer layer of pressure-sensitive adhesive layer, but the use of a melt-blending in incompatible cortex EMA material to improve the compatibility between the skin layer and the core material sex.

虽然Forte描述了有弹性的微孔多层膜,但他既未描述特意在复合膜中不同部位放置较高性能的弹性体材料以弥补较低性能、较低成本的弹性体材料,并在一定的伸长率下特别有效的多层薄膜,也未描述透气性较高、膜本身具有特定附加拉伸和回复特性的“产品”膜,特别对3层膜实施方案。 Although Forte describes flexible microporous multilayer film, but he neither described specifically placed in different parts of high performance elastomeric material in the composite film to compensate for the lower performance, lower cost of elastomeric material, and in certain The multilayer film is particularly effective under elongation, nor describe a high permeability, the film itself has a certain additional stretch and recovery properties of the "product" film, in particular embodiments of the three-layer film.

因此,目前需要下述一种高效膜及由其制成的层合材料:它能具有较高透气性(即WVTR)和身体舒适性,主要使用较低成本的弹性体,但在复合膜中策略性地放置了较高成本的高性能弹性体以弥补较低性能弹性体的性能而又不牺牲透气性。 Therefore, the current need for an efficient film therefrom following laminated material: it has a high gas permeability (i.e. WVTR) and body comfort, the main use of the elastomeric lower cost, but in the composite film strategically placed high-performance elastomer to compensate for the higher cost of lower performance elastomer performance without sacrificing breathability. 目前需要一种其本身具有显著回复或回缩的拉伸特性的多层膜产品和膜层合材料。 At present, a need for a significant response by itself or retraction of the tensile properties of the product and the film was laminated multilayer film materials. 这种改进会有利于由这种膜和/或层合材料生产的制品保持合体性。 This improvement would benefit from such films and / or laminates of the articles produced keep fit. 目前需要一种在制造过程中较少出现口模唇积料的多层弹性透气膜,而且该膜包括一种能允许极性与非极性材料共挤出的增容剂。 At present, a need for a breathable elastic multilayer film appears less die lip product material in the manufacturing process, but also allow the membrane comprises a polar and non-polar materials coextruded compatibilizer. 目前还需要一种3层膜,它兼具有弹性和透气性,而且还不会出现制造5层膜那样的计算复杂性。 There is a need for a three-layer film, and it has the flexibility and breathability, but also does not appear that the computational complexity of a 5-layer film.

发明概述本发明的多层膜已完成了上述需要并克服了本领域内技术人员遇到的问题,所述多层膜包括一层第一弹性体的填充芯层和至少一层第二弹性体的整体皮层,所述第一弹性体基本上是成本较低的低性能弹性体,所述第二弹性体是有助于弥补芯层弹性的较高性能弹性体。 Summary of the multilayer film of the present invention have completed the above needs and overcomes the problems encountered by persons skilled in the art, the multilayer film comprising a core layer of a first elastomer filling and at least one second elastomeric whole cortex, the first elastomeric substantially lower cost, low performance elastomer, the second elastomer is a help compensate for the elastic core layer of high performance elastomer. 拉伸/取向该填充薄膜,以在靠近填料处产生有孔洞的微孔薄膜,其中所述膜的WVTR至少为1,000g/m2/24小时。 Stretching / orientation of the filler film to produce a microporous film holes near the padding, WVTR wherein said film is at least 1,000g / m2 / 24 hr. 本发明所得的微孔膜表现出弹性而未牺牲透气性。 The resulting microporous film of the present invention exhibit elasticity without sacrificing breathability. 优选芯层包含一种成本较低的滞后(hysteresis)值大于约75%的低性能弹性体,如聚烯烃弹性体,特别是茂金属催化弹性聚乙烯。 Preferably the core layer comprises a cost lower hysteresis (hysteresis) value greater than about 75% of the low performance elastomers such as polyolefin elastomer, in particular metallocene-catalyzed elastomeric polyethylene. 或者,也可以将少量较高性能的弹性体如苯乙烯嵌段共聚物(如KratonG)与所述芯层中较低性能-较低成本的弹性体进行共混以改进材料的总体弹性。 Alternatively, the elastomer may be a small amount of higher performance such as styrene block copolymers (e.g. KratonG) with the core layer lower performance - lower cost elastomer is blended to improve the overall resilient material .

希望皮层包含滞后值低于约75%,优选低于60%的共混的较高性能弹性体,特别是热塑性聚氨酯弹性体和聚醚酰胺。 Hope cortex contains hysteresis value less than about 75%, preferably less than 60% high performance elastomer blend, in particular a thermoplastic polyurethane elastomer and polyether amide. 还希望将丙烯酸甲酯含量高的EMA与较高性能的弹性体共混在皮层中,以起增容剂的作用并提高层合材料中芯层与纤维外层的粘结性。 Methyl acrylate is also desirable high content of EMA and higher performance elastomer blends in the cortex, in order to act as a compatibilizer and improves laminate core with the fibers in the outer layer adhesion. 皮层有助于减少薄膜挤出过程中的口模唇积料。 Cortical film extrusion process helps to reduce the die lip product material.

在本发明的另一个方面中,在一层或多层弹性皮层中加入苯乙烯嵌段共聚物弹性树脂以起增容剂作用,有助于两种不相容材料,例如在芯层和皮层中可发现的那些不相容材料之间的粘结。 In another aspect of the present invention, by adding one or more elastic styrene block copolymer elastomer in the skin layer resin in order to play the role of a compatibilizer, helps two incompatible materials, such as the core layer and skin layer Incompatible materials bond between those that can be found.

在本发明的又一个方面中,将本发明的微孔膜层合到纤维层上。 In yet another aspect of the invention, the microporous film of the present invention will be bonded to the fibrous layer. 所述纤维层可以是一种无纺织物如一种可伸长的无纺织物。 The fibrous layer may be a nonwoven fabric An extensible nonwoven fabric. 本发明的薄膜无纺层合材料能作为阻隔层用于贴身制品中,例如,用作尿布的外包层、成人失禁服、保护服等。 Film nonwoven laminate of the present invention can be used in personal care products as a barrier layer in, for example, as a diaper outer cladding, adult incontinence garment, protective clothing and the like. 此外,在本发明的又一个方面中,本发明的透气微孔膜和/或膜层合材料构成吸湿性贴身制品中的一个组分。 Further, in still another aspect of the present invention, the breathable microporous film of the present invention and / or film laminate material in absorbent personal care products as a component. 例如,一种吸湿贴身制品可包括透液内衬;吸收芯;和本发明的微孔膜或膜层合材料,其中吸收芯位于透液衬与微孔膜或膜层合材料之间。 For example, an absorbent personal care product may include a liquid permeable liner; absorbent core; and microporous film or film laminate material of the present invention, wherein the absorbent core is positioned between the liquid pervious liner and microporous film or film laminate material.

附图简述图1是本发明的多层膜产品的截面侧视图。 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional side view of a multilayer film products of the present invention. 为便于说明,膜的右侧已被切开。 For purposes of illustration, the right side of the film has been cut.

图2是本发明的多层膜/无纺层合材料的截面侧视图。 Figure 2 is a multi-layer film of the invention / a cross-sectional side view of the nonwoven laminated material.

图3是本发明形成多层膜和多层膜/无纺层合材料的工艺的示意侧视图。 Figure 3 is the present invention for forming a multilayer film and multilayer film / nonwoven laminate a schematic side view of a process.

图4是一个典型的个人护理吸湿制品,经部分切开后的顶视图,在此情况下是一块尿布,该制品使用了本发明的多层膜和多层膜/无纺层合材料。 Figure 4 is a typical personal care absorbent articles, the partially cut-away top view, in this case a diaper, the article of the present invention uses a multilayer film and multilayer film / nonwoven laminate.

定义如本文和权利要求中所用,术语“包含”是指包含两端或不含两端的,且不排除其它未列出的元素、组分或方法步骤。 Definitions As used herein and in the claims, the term "comprising" means comprising free ends or both ends, and does not exclude other elements not listed, components, or method steps.

如本文所用,术语“回复”是指一种材料在所施偏力作用下拉伸后,偏力终止时已拉伸材料的回缩。 As used herein, the term "response" refers to a material after stretching under the applied biasing force, when the material is stretched retraction biasing force terminates. 例如,如果一种未受偏力作用时松弛长度为1英寸(2.5cm)的材料,通过将长度拉伸到1.5英寸(3.75cm)而拉长50%,则该材料就伸长了50%且具有一个是其松弛长度150%或拉伸1.5倍的伸长长度。 For example, if a biasing force of the unaffected relaxed length of one inch (2.5cm) of material, by stretching to a length of 1.5 inches (3.75cm) and 50% elongation, the elongation of the material is 50% and has a 150% of its relaxed length or stretched 1.5 times the extended length. 如果这个实验的拉伸材料在偏力或拉伸力除去后收缩,即回复到1.1英寸(2.75cm)长,则这个材料就回复了其0.5英寸(1.25cm)伸长的80%。 If this experiment stretchable material after removing the biasing force of contraction or stretching force, i.e., revert to 1.1 inches (2.75cm) long, then the material will reply to its 0.5 inches (1.25cm) 80% elongation. 百分回复率可表达为[(最大伸长长度-最终试样长度)/(最大伸长长度-起始试样长度)]100。 Percent recovery rate can be expressed as [(maximum stretch length - final sample length) / (maximum stretch length - initial sample length)] 100.

如本文所用,术语“无纺”织物或是指其结构为单根纤维或线交织但不象针织织物那样有明确方式可循的织物。 As used herein, the term "nonwoven" fabric or means having the structure of individual fibers or threads interwoven knit fabric but not as clearly as the way to follow the fabric. 无纺织物可以用多种工艺形成,例如熔喷工艺、纺粘工艺、水力缠结工艺、气流工艺和粘合粗梳织物工艺。 The nonwoven fabric may be formed by a variety of processes, such as meltblowing processes, spunbonding processes, hydroentangling processes, air bonded carded web processes and process.

如本文所用,术语“可伸长”是指在至少一个方向上可伸长或可拉伸。 As used herein, the term "extensible" refers to at least one direction extensible or stretchable.

如本文所用,术语“纺粘纤维”是指分子取向的聚合物材料的小直径纤维。 As used herein, the term "spunbonded fibers" refers to small diameter fibers of molecularly oriented polymeric material. 纺粘纤维可以用下述方法形成:将熔融热塑性材料从喷丝头的许多细的,通常为圆形的毛细孔中挤成单丝,然后通过例如下列专利中所述的方法迅速减小挤出单丝的直径:授予Appel等人的美国专利4,340,563,授予Dorschner等人的美国专利3,692,618,授予Matsuki等人的美国专利3,802,817,授予Kinney的美国专利3,338,992和3,341,394,授予Hartman的美国专利3,502,763,授予Dobo等人的美国专利3,542,615和授予Pike等人的美国专利5,382,400,各文献均全文引入于此以供参考。 Spunbond fibers may be formed by the following method: The molten thermoplastic material from a plurality of fine spinneret, usually circular, capillaries in the extruded filaments, and then by a method such as described in the following patents rapidly decrease the pressing the diameter of the monofilament: grant Appel et al U.S. Patent 4,340,563, granted to Dorschner et al., U.S. Patent No. 3,692,618, U.S. Patent 3,802,817 to Matsuki et al., U.S. Patent 3,338,992 and 3,341,394 to Kinney, U.S. Patent 3,502,763, Hartman, grant Dobo et al., U.S. Patent No. 3,542,615 and U.S. Patent No. 5,382,400 granted to Pike et al., all references are incorporated herein by reference. 纺粘纤维在沉积于收集表面上时一般不带粘性且一般是连续的。 Spunbond fibers when deposited on the collecting surface is generally non-sticky and are generally continuous. 纺粘纤维的直径常为约10μm或更粗。 Spunbond fibers are often diameter of about 10μm or larger. 但是,用各种方法,包括但不限于,共同受让给Marmon等人的WO专利申请98/23804和Pike等人的美国专利5,759,926中所述的那些方法,可以得到细纤维纺粘织物(平均纤维直径小于约10μm)。 Those methods, however, by various methods, including but not limited to, commonly assigned to Marmon et al., WO Patent Application 98/23804 and Pike et al., U.S. Patent No. 5,759,926 was used, fine fiber spunbond can be obtained (average fiber diameter less than about 10μm).

如本文所用,术语“熔喷纤维”是指一般用下述方法获得的聚合材料的纤维:将熔融热塑性材料从许多细的,通常是圆形的口模毛细孔中挤成熔线或单丝,进入通常是热的收敛高速气流(如空气)中,拉细熔融热塑性材料单丝以减小它们的直径。 As used herein, the term "meltblown fibers" means fibers are generally obtained by the following polymeric materials: the molten thermoplastic material from a plurality of fine, usually circular die capillaries in the extruded filaments fuse or enter the convergence speed usually hot gas stream (such as air), the attenuation of molten thermoplastic material filaments to reduce their diameter. 然后,熔喷纤维会被高速气流带走并沉积在收集表面上以形成无序分散的熔喷纤维的织物。 Thereafter, the meltblown fibers will be taken away high velocity gas stream and are deposited on a collecting surface of the fabric to form a disordered dispersed meltblown fibers. 这一工艺公开在,例如,授予Butin等人的美国专利3,849,241和授予Timmons等人的美国专利5,271,883中,各文献全文引入于此以供参考。 This process is disclosed in, e.g., U.S. Patent 3,849,241 to Butin et al., And granted to Timmons et al., U.S. Patent No. 5,271,883, each of the documents incorporated herein by reference. 熔喷纤维可以是连续的或不连续的,平均直径一般小于10μm,沉积在收集表面上时一般带有粘性。 Meltblown fibers may be continuous or discontinuous, are generally smaller than the average diameter of 10μm, is deposited on the collection surface is generally sticky.

如本文所用,“多层无纺层合材料”是指一种2层或多层的层合材料,其中至少一层是无纺材料如纺粘层。 As used herein, "multilayer nonwoven laminate" refers to a two-layer or multi-layer laminate material, wherein at least one layer is a nonwoven material such as spunbond layer. 例如,多层无纺层合材料可包括一种纺粘/熔喷/纺粘(SMS)层合材料,或一种如下的层合材料:其中至少一层是无纺织物而其它一层或多层是另一种材料,如纺粘/薄膜层合物(SF)中的薄膜。 For example, a multi-layer nonwoven laminate material may comprise a spunbonded / meltblown / spunbond (SMS) laminate, or one of the following laminate: wherein at least one layer is a nonwoven fabric and the other layer or multilayer is another material, such as a spunbond / film laminate (SF) in the film. 多层无纺层合材料的例子在下述专利中已被公开:授予Brock等人的美国专利4,041,203,授予Perkins等人的美国专利5,178,931和授予Timmons等人的美国专利5,188,885,各文献全文引入于此以供参考。 Examples of multilayer nonwoven composite material layers have been disclosed in the following patents: U.S. patent to Brock et al., 4,041,203, granted to Perkins et al., U.S. Patent No. 5,178,931 and U.S. Patent No. 5,188,885 granted to Timmons et al., Each incorporated herein literature for reference. 这样的层合材料可以通过在移动的成型带上相继地先沉积一层纺粘织物,然后沉积一层熔喷织物,最后沉积另一层纺粘织物,然后以下文所述的热点粘合之类的方法将层合材料粘结起来而制成。 Such a laminate can be produced by successively moving forming belt first a spunbond fabric layer is deposited, and then depositing a layer of meltblown fabric, spunbond fabric and finally depositing another, then the following thermal point bonding of the hereinbefore described Method class bonded laminate made. 或者也可以分别制造各织物层,收集在辊上,然后在一个独立的粘结步骤中将它们结合在一起。 Alternatively, each fabric layer can be manufactured separately, collected on a roll, and then in a separate bonding step will be to combine them.

如本文所用,术语“聚合物”一般包括,但不限于,均聚物、共聚物,例如嵌段、接枝、无规和交替共聚物,三元共聚物等,以及它们的共混物或改性物。 As used herein, the term "polymer" generally includes, but not limited to, homopolymers, copolymers, such as block, graft, random and alternating copolymers, terpolymers, etc., and blends thereof, or modifications thereof. 而且,除非另有特别限制,术语“聚合物”包括分子所有可能的空间构型。 Furthermore, unless otherwise specifically limited, the term "polymer" includes all possible molecular spatial configuration. 这类构型包括但不限于全同立构、间同立构和无规立构。 Such configurations include, but are not limited to isotactic, syndiotactic and atactic.

如本文所用,术语“加工方向”或MD是指织物在其生产方向上的长度。 As used herein, the term "machine direction" or MD means the length of the fabric in its production direction. 术语“横向”或CD是指织物宽度,即一般是垂直于MD的方向。 The term "horizontal" or CD means the width of the fabric, which is generally perpendicular to the MD.

如本文所用,术语“超声粘结”是指,例如,使织物经过音响喇叭与支承辊之间而进行的工艺,如授予Bornslaeger的美国专利4,374,888所述。 As used herein, the term "ultrasonic bonding" means, for example, so that the process after the fabric between the stereo speakers and the backup roller carried out, as described in U.S. Patent No. 4,374,888 granted to the Bornslaeger.

如本文所用,术语“点粘结”是指将一层或多层织物在许多分立的粘结点上粘结起来。 As used herein, the term "point bonding" means one or more layers of fabric bonded on many discrete bond points. 例如,热点粘结一般涉及让一层或多层要粘结的层通过加热辊之间,例如一个刻花辊与一个光滑的压延辊之间。 For example, point bonded relates generally to make one or more layers to be bonded between heated rolls, such as between an engraved roll and a smooth calender roll. 刻花辊一般以某种方式刻花使整个织物不是整个表面粘结,而支承辊通常是平的。 Engraved roller generally stencil in some way so that the entire fabric is not the entire surface of the adhesive, and the backing roll is usually flat. 因此,为了功能也为了美观起见,已对刻花辊发展了多种花样。 Therefore, in order to function also for aesthetic reasons, has already developed a variety of patterns engraved roller. 点粘结花样的一个实例是Hansen Pennings或“H&P”花样,新辊有约30%的粘结面积,每平方英寸有约200个粘结点,如Hansen和Pennings在美国专利3,855,046指提出,全文引入于此以供参考。 An example of point bonding pattern is Hansen Pennings or "H & amp; P" pattern, about 30 percent of the new roll bonded area, about 200 square inches per bond points such as Hansen and Pennings finger raised in the United States Patent 3,855,046 , incorporated herein by reference. H&P花样具有方点形或针形粘结面积,其中每个针点的边长为0.038英寸(0.965mm),针点之间的间距为0.070英寸(1.778mm),粘结深度为0.023英寸(0.584mm)。 H & amp; P pattern has square point or pin-shaped bonded area, wherein each side length of the needle point is 0.038 inches (0.965mm), the spacing between the needle point is 0.070 inches (1.778mm), the depth of bonding of 0.023 inch (0.584mm). 另一个典型的点粘结花样是膨胀HansenPennings或“EHP”粘结花样,新辊产生15%的粘结面积,方形针点的边长为0.037英寸(0.94mm),针点间距为0.097英寸(2.464mm),粘结深度为0.039英寸(0.991mm)。 Another typical point bonding pattern is the expansion HansenPennings or "EHP" bond pattern, generated 15% of the new roll bonded area, the side length of the square needle point is 0.037 inches (0.94mm), pin-point spacing of 0.097 inches ( 2.464mm), a depth of 0.039 inches bonding (0.991mm). 另一个称为“714”的点粘结花样具有方形针粘结面积,其中,每个针点边长为0.023英寸,针点间距为0.06 2英寸(1.575mm),粘结深度为0.033英寸(0.838mm)。 Another known "714" of the point bonding pattern bond area with a square pin, wherein each needle point side length 0.023 inches, pin-point spacing of 0.06 2 inches (1.575mm), a depth of 0.033 inches bonding ( 0.838mm). 新辊所得花样的粘结面积为约15%。 The resulting pattern of the new roll bonded area of about 15%. 还有一个常用的花样是C-星花样,新辊的粘结面积约16.9%。 There is a common pattern C- star pattern, a new roll bonding area of about 16.9%. C-星花样有一个十字交叉棒或被散射星中断的灯芯绒设计。 C- Star pattern has a cross bar or corduroy design scattering Star break. 其它常用花样包括带有重复而略偏斜的菱形、粘结面积约16%的菱形花样和一种线织花样,顾名思义,看上去象窗纱,粘结面积约15%。 Other common pattern with repeating and slightly skewed including diamond, bonded area of about 16% of the diamond pattern and a wire weave pattern, as the name suggests, looks like screens, about 15% bond area. 还有一种花样是新辊粘结面积约17%的“s-织造”花样和新辊粘结面积约12%的婴儿制品花样。 Another pattern is the new roll bonding area of about 17% of the "s- weave" pattern and a new roll bonding area of about 12% of infants products tricks. 这些粘结花样在授予Yeo等人的美国专利5,599,420中有进一步描述,该专利全文引入于此以供参考。 The bonding pattern is further described, which patent is incorporated herein by reference in U.S. Patent No. 5,599,420 granted to Yeo et al. 一般地说,粘结面积百分率低于约50%,更优选占层合材料面积的约10%-约30%不等。 Generally, the percentage of bonded area of less than about 50%, more preferably from about 10% laminate area - about 30% range.

如本文所用,术语“弹性的”或“弹性体的”是指受偏力作用时在至少一个方向上可伸长或拉长并在力除去后几乎回到其原长的材料。 As used herein, or "elastomeric" the term "flexible" refers to at least one direction may be elongated or stretched when the biasing force by the force is removed and, after almost returned to its original length material. 例如,一种其偏离长度大于其松弛时未偏离长度至少50%的伸长材料在伸长力松弛时其长度回复到至少50%伸长率以内。 For example, a large length thereof does not deviate from the length of at least 50% of the elongation of the material deviates from its slack in the elongation force is relaxed length when it is restored to within at least 50% elongation. 一个假定的例子是,一个1英寸长的材料可伸长到至少1.50英寸,在偏力松弛时,将回复到不大于1.25英寸的长度。 A hypothetical example is a one inch length of the material can be stretched to at least 1.50 inches, when the biasing force is relaxed, will revert to not more than 1.25 inches in length.

如本文所用,术语“伸长百分率”是指通过测量伸长尺寸的增量然后除以原长得到的比值,即(伸长尺寸的增量/原尺寸)100。 As used herein, the term "percent elongation" refers to the incremental elongation is measured by the size of the original length and then dividing by the ratio obtained, i.e. (incremental elongation size / original size) 100.

如本文所用,术语“永久变形”是指材料试样在伸长与回复后,即在材料经拉伸并允许松弛后,所保留的伸长率。 As used herein, the term "permanent set" refers to elongation of the material sample after elongation and recovery, i.e., stretched in the material and allow relaxation after retained.

如本文所用,术语“永久变形百分率”是材料经循环后从其原长被拉伸的量的量度。 As used herein, the term "permanent deformation percentage" is a measure of the amount of the original length after being stretched by the loop material therefrom. 在所施应力除去后残留的应变计为永久变形百分率。 After removal of the applied stress in the residual strain gauges for the percentage of permanent deformation. 永久变形百分率是一次循环中收缩曲线与伸长率坐标轴的交点,正如下文进一步讨论。 The percentage of permanent deformation is a cycle contraction curve and elongation axis of the intersection, as discussed further below.

如本文所用,术语“非弹性的”或“非弹性”是指不属于以上“弹性的”定义范围内的任何材料。 As used herein, the term "inelastic" or "nonelastic" refers to any material that do not fall within the "elastic" defined range.

如本文所用,术语“可透气的”是指允许水蒸汽透过、其最低WVTR(水蒸汽透过率)为约1,000g/m2/24小时的材料。 As used herein, the term "breathable" refers to allow water vapor transmission, minimum WVTR (water vapor transmission rate) of about 1,000g / m2 / 24 hr material. 织物的WVTR,一方面指示织物穿起来有多舒适。 Fabric WVTR, on the one hand indicates the fabric more comfortable to wear. WVTR用下文所示方法测量,结果以g/m2/24小时为单位计录。 WVTR measurement method as shown below, results in g / m2 / 24-hour units meter record. 但是,优选常用的透气阻隔层有较高的WVTR,而本发明透气阻隔层的WVTR能超过约1200g/m2/24小时,1500g/m2/24小时,1800g/m2/24小时或甚至超过2000g/m2/24小时。 Preferably, however, conventional breathable barrier layer has a higher WVTR, but the present invention is breathable WVTR barrier layer can be more than about 1200g / m2 / 24 小时, 1500g / m2 / 24 小时, 1800g / m2 / 24 hours, or even more than 2000g / m2 / 24 hr.

如本文所用,术语“共混”是指两种或多种聚合物的混合物。 As used herein, the term "blend" means a mixture of two or more polymers. 在一些例子中,共混物的组分不相容但已在高剪切下经熔体共混以获得一种均匀的共混物。 In some instances, blends of incompatible components, but already by melt blending under high shear to obtain a homogeneous blend.

如本文所用,术语“增容剂”是指有助于两种一般是不相容的材料之间粘结的材料。 As used herein, the term "compatibilizing agent" refers generally contributes two bonding material between incompatible materials.

如本文所用,术语“衣服”是指任何可穿着的衣服。 As used herein, the term "clothes" refers to any wearable clothes. 它包括工作服和衣裤相连的工作服、内衣、内裤、衬衣、外套、手套、袜子等。 It includes clothes and underwear connected overalls, underwear, pants, shirts, jackets, gloves, socks and so on.

如本文所用,术语“个人护理产品”是指尿布、训练裤、吸湿内裤、成人失禁用品和妇女卫生用品。 As used herein, the term "personal care product" means diapers, training pants, absorbent underpants, adult incontinence and feminine hygiene products.

如本文所用,术语“高性能弹性体”是指10gsm试样用下文所述方法测定时滞后水平低于约75%,优选低于约60%的弹性体。 As used herein, the term "high performance elastomer" refers 10gsm sample measured by the method described hereinafter the level of hysteresis of less than about 75%, preferably less than about 60% of the elastomer. 滞后值测定如下:首先将试样伸长到一定的最终伸长率(例如50%或100%),然后使试样回缩到阻力为零的某一值。 Lag value is determined as follows: First, a sample is stretched to a certain ultimate elongation (e.g., 50% or 100%), then the sample is retracted to a resistance value of zero. 为应用起见,术语“最终伸长率”应理解为指一个预定的伸长百分率。 For application purposes, the term "ultimate elongation" is understood to mean a predetermined percent elongation. 为应用起见,滞后值测量值,如高性能和低性能弹性体中所用(如下文进一步解释),是在横向上最终总伸长率为30%和50%时的读数。 For application purposes, the hysteresis value measured values, such as high performance and low performance elastomer used (explained further below), in the transverse direction is 30% and 50% of the reading time of the final total elongation.

如本文所用,术语“低性能弹性体”是指用下文所述的方法测定时滞后水平大于约75%的弹性体。 As used herein, the term "low performance elastomer" refers to the measurement methods described below the level of hysteresis of greater than about 75% of the elastomer.

如本文所用,术语“前体薄膜”是指一种尚未经拉伸或取向以使颗粒填料与其聚合物组分分离从而产生微孔的填充膜。 As used herein, the term "precursor film" refers to a not yet been stretched or oriented so that their particulate filler to produce filled polymer fractionation membrane micropores.

如本文所用,术语“产品膜”是指一种已经拉伸或取向,因此在颗粒填料组分周围已形成孔洞,从而颗粒填料与聚合物组分已分离的微孔填充膜。 As used herein, the term "product film" means a has stretched or oriented, thus the particulate filler component has been formed around the hole, so that the microporous membrane is filled with filler particles separated polymer component. 产品膜可以这种形式使用或以后用于层合材料中。 Products membranes can be used later for this form or laminated materials.

如本文所用,术语“整块”是指一种非填充薄膜或膜层。 As used herein, the term "block" refers to an unfilled film or film layer.

如本文所用,术语“填料”意指包括能加到薄膜聚合物挤出材料中对挤出膜不会化学干扰或产生有害影响并能均匀分散在整个薄膜中的颗料和/或其它形式的材料。 As used herein, the term "filler" is meant to include can be added to a film polymer extrusion material in the extruded film does not chemically interfere with or adversely affect and can be uniformly dispersed throughout the film in the granule and / or other forms of materials. 一般地说,填料呈颗粒状,平均颗粒尺寸为约0.1-约10μm,优选约0.1-约4μm。 In general, granular filler, the average particle size of about 0.1 to about 10μm, preferably from about 0.1 to about 4μm.

如本文所用,术语“颗粒尺寸”描述填料颗粒的最大尺寸或长度。 As used herein, the term "particle size" describes the largest dimension or length of the filler particles.

如本文所用,术语“双组分纤维”是指由至少两种分别自单独的挤出机挤出的聚合物源形成但一起纺成一根纤维的纤维。 As used herein, the term "bicomponent fibers" refers to self-separate from at least two polymer sources extruder separately but together forming a spun fibers. 这种双组分纤维有时也指共轭纤维或多组分纤维。 Such bicomponent fibers are also sometimes means a conjugate fibers or multicomponent fibers. 两种聚合物基本上始终位于双组分纤维截面上分立的区域并沿双组分纤维长度方向连续伸展。 Two polymers is always located substantially on the bicomponent fiber cross-section and the discrete regions along the length direction of the continuous bicomponent fibers extend. 双组分纤维的构型可以是,例如,一种聚合物围绕另一种聚合物的鞘/芯排列,也可以是并排排列、饼式(pie)排列或“海岛”排列。 The configuration of a bicomponent fiber may be, for example, a polymer around a sheath / core arrangement of another polymer, or may be arranged side by side, pie formula (pie) arrangement or "island" arrangement. 双组分纤维在授予Kaneko等人的美国专利5,108,820、授予Krueger等人的美国专利4,795,668、授予Marcher等人的美国专利5,540,992、授予Strack等人的美国专利5,336,552中提出,各文献均全文包括于此供参考。 U.S. Patent bicomponent fibers in U.S. Patent No. 5,108,820 granted to Kaneko et al., Granted to Krueger et al 4,795,668, granted to Marcher et al., U.S. Patent No. 5,540,992, granted to Strack et al., U.S. Patent No. 5,336,552 proposes, each document are hereby incorporated herein by for reference. 在授予Pike等人的美国专利5,382,400中也提出了双组分纤维。 In U.S. Patent No. 5,382,400 granted to Pike et al also proposed a bicomponent fiber. 对于双组分纤维,聚合物可按75/25,50/50,25/75或任何其它所需的比例存在。 For bicomponent fibers, the polymer can be 75 / 25,50 / 50,25 / 75 or any other desired ratio exists.

发明详述本发明的目的是多层透气弹性膜产品,即具有2层或多层的薄膜、制造这类薄膜的方法以及将这种薄膜层合到支持层如纤维状无纺织物上的方法。 DETAILED DESCRIPTION The object of the present invention is a multi-layer breathable elastic film product, i.e. having two or more layers of a thin film layer, a method of manufacturing such films and to such films laminated to support layers such as the method of a fibrous non-woven fabric . 参考图1,其中示意了一种多层膜产品(具体地说,一种已从制造过程取出的产品膜)10c,为说明起见该图右侧已切开。 Referring to Figure 1, which illustrates a multi-layer film product (specifically, a product extracted from the manufacturing process of the film) 10c, for purposes of illustration the right side of the drawing is cut. 该多层膜产品10c包括一个芯层12。 The multilayer film comprises a core layer 12 product 10c. 芯层12有一个第一外表面14和一个第二外表面16。 Core 12 has a first outer surface 14 and a second outer surface 16. 芯层还有一个芯厚度22。 There is also a core thickness of the core layer 22. 芯层12的第一外表面14上粘着一个第一皮层厚度24的第一皮层18。 A first adhesive skin thickness 24 of the first skin layer 18 on the outer surface 14 of the first core layer 12. 芯层12的第二外表面16上粘着一个第二皮层厚度26的任选第二皮层20。 Optionally a second skin layer thickness of the adhesive 26 of the second skin layer 20 on the core 12 of the second outer surface 16. 理想地,该多层薄膜有3层。 Desirably, the multilayer film has 3 layers.

芯层12,优选它占整个薄膜的约85-98%,由第一弹性体,即一种可挤出的低性能弹性体聚合物,如聚烯烃,或所述聚合物的混合物构成。 The core layer 12, which preferably comprises about 85-98% of the entire film, from a first elastomer, i.e. a low-performance extrudable elastomeric polymer, such as a polyolefin, or mixture of said polymers. 芯层优选由聚乙烯组成,尤其是Dow化学公司以商品名DowEngageEG8200和Dow AffinitypL1845出售的单点/茂金属催化聚乙烯。 The core layer is preferably made of polyethylene, in particular of the Dow Chemical Company under the tradename Dow AffinitypL1845 DowEngageEG8200 and a single point of sale / metallocene-catalyzed polyethylene.

这类在本领域内称作茂金属、单点或“受限几何”催化的聚合物,在授予Obijeski等人并授权Dow化学公司的美国专利5,472,775中已有所述。 Such metallocene known in the art, a single point or catalyzed polymer "constrained geometry", has been described in U.S. Patent No. 5,472,775 granted to Obijeski et al., And Dow Chemical Company's authorization. 其全文内容引入于此以供参考。 In its entirety is incorporated herein by reference. 茂金属方法一般使用一种活化的即由一种助催化剂离子化的茂金属催化剂。 The metallocene process generally employs a cocatalyst i.e. by ionizing a metallocene catalyst activated. 茂金属催化剂的实例包括双(正-丁基环戊二烯基)二氯化钛、双(正-丁基环戊二烯基)二氯化锆、双(环戊二烯基)氯化钪、双(茚基)二氯化锆、双(甲基环戊二烯基)二氯化钛、双(甲基环戊二烯基)二氯化锆、二茂钴、环戊二烯基三氯化钛、二茂铁、二氯化二茂铪、异丙基(环戊二烯基-1-flourenyl)二氯化锆、二氯化二茂钼、二茂镍、二氯化二茂铌、二茂钌、二氯化二茂钛、氯化二茂锆氢化物以及二氯化二茂锆等。 Examples of metallocene catalysts include bis (n - butylcyclopentadienyl) titanium dichloride, bis (n - butylcyclopentadienyl) zirconium dichloride, bis (cyclopentadienyl) scandium chloride, bis ( indenyl) zirconium dichloride, bis (methylcyclopentadienyl) titanium dichloride, bis (methylcyclopentadienyl) zirconium dichloride, bis (cyclopentadienyl) cobalt, cyclopentadienyl trichloride titanium, ferrocene, ferrocene hafnium dichloride, isopropyl (cyclopentadienyl -1-flourenyl) zirconium dichloride, bis-mao molybdenum, ferrocene nickel, niobium ferrocene dichloride, Ruthenocene, titanocene dichloride, zirconocene chloride hydride and zirconium dichloride ferrocene. 这类化合物更完整的清单包括在授予Rosen等人并受让给Dow化学公司的美国专利5,374,696中。 US patent a more complete list of such compounds include the grant and Rosen et al., Assigned to the Dow Chemical Company's 5,374,696. 这类化合物在授予Stevens等人并受让给Dow的美国专利5,064,802中也有所讨论。 Such compounds in grants and Stevens et al., Assigned to Dow's US Patent 5,064,802 also been discussed. 但是,本领域还知道许多其它的茂金属、单点和/或类似的催化体系,见,例如,授予Etherton等人的美国专利5,539,124、授予Krishnamurti等人的美国专利5,554,775;授予Erderly等人的美国专利5,451,450以及Kirk-Othemer,TheEncyclopedia of Chemical Technology,第四版,17卷,烯烃聚合物,765-767页(John Wiley & Sons1996);所有上述专利全文均引入于此以供参考。 However, the art is also known many other metallocene, single-site and / or similar catalyst system, see, e.g., U.S. Patent No. 5,539,124 granted to Etherton et al., Granted to Krishnamurti et al., U.S. Patent No. 5,554,775; U.S. granted Erderly et al Patents 5,451,450 and Kirk-Othemer, TheEncyclopedia of Chemical Technology, Fourth Edition, Volume 17, olefin polymers, pages 765-767 (John Wiley & amp; Sons1996); the full text of all of the above patents are incorporated herein by reference.

芯层12还包括至少一种填料。 Core layer 12 further comprises at least one filler. 为最终得到一个透气的芯层12,优选在芯层聚合物挤出共混物中加入一种或多种填料。 To end up with a breathable core layer 12, preferably extrusion blending was added one or more fillers in the core polymer. 这些填料不仅能最终赋予透气性,也能用来减少芯层12中的聚合物用量。 These fillers impart not only the final permeability, can also be used to reduce the amount of polymer in the core layer 12. 无机或有机填料都能用于本发明,只要它们不干扰成膜工艺和/或后续的层合工艺即可。 Inorganic or organic fillers can be used in the present invention, so long as they do not interfere with the film formation process and / or subsequent to the lamination process. 填料的实例包括碳酸钙(CaCO3)、各种粘土、二氧化硅(SiO2)、氧化铝、硫酸钡、碳酸钠、滑石粉、硫酸镁、二氧化钛、沸石、硫酸铝、纤维素-型粉末、硅藻土、石膏、硫酸镁、碳酸镁、碳酸钡、高岭土、云母、碳、氧化钙、氧化镁、氢氧化铝、纸粉、木粉、纤维素衍生物、聚合物颗粒、甲壳质和甲壳质衍生物。 Examples of fillers include calcium carbonate (CaCO3), various clays, silica (SiO2), aluminum oxide, barium sulfate, sodium carbonate, talc, magnesium sulfate, titanium dioxide, zeolites, aluminum sulfate, cellulose - type powder, silicon diatomaceous earth, gypsum, magnesium sulfate, magnesium carbonate, barium carbonate, kaolin, mica, carbon, calcium oxide, magnesium hydroxide, aluminum, paper powder, wood powder, cellulose derivatives, polymer particles, chitin and chitin derivatives. 填料颗粒可任选地涂有脂肪酸,如硬脂酸或山萮酸,和/或其它物质,目的是促进颗料(本体)的自由流动以及它们分散进聚合物的容易程度。 Filler particles may optionally be coated with fatty acids such as stearic acid or behenic acid, and / or other substances, in order to promote granule (body) of the free-flowing and their ease of dispersion into the polymer. 一种特别有用的填料是ECC International of Atlanta公司,Georgia以Supercoat出售的碳酸钙。 A particularly useful filler is ECC International of Atlanta Corporation, Georgia to Supercoat sell calcium carbonate. 填充薄膜优选含至少占膜层总重量35%的填料,更优选约50重量%-约65重量%填料。 Filler-containing film preferably comprise at least 35% of the total weight of the filler layer, and more preferably about 50% by weight - about 65 wt% of a filler. 由于聚合物共混物的性质,当所用的填料量少于约50%时会出现辊粘现象,辊粘是指当前体膜从辊上退卷时它们之间出现粘连的现象。 Due to the nature of the polymer blend, when the filler used is less than about 50% roll-sticking occurs, sticking roller means blocking phenomenon that appears between them when the precursor film is unwound from the roll. 因此,凡是填料用量较低时,可能必须有附加工艺助剂和/或工艺改进以防止这种粘连。 Therefore, all the lower filler content, you may have additional processing aids and / or process improvements to prevent such adhesions.

此外,膜的透气填充芯层可任选地包括一种或多种稳定剂。 In addition, the core layer breathable filled film may optionally include one or more stabilizers. 优选填充膜包括一种抗氧化剂,如一种受阻酚稳定剂。 Preferably filled film includes an antioxidant, such as a hindered phenol stabilizer. 商品抗氧剂包括,但不限于,Tarrytown,NY的Ciba Specialty Chemicals公司出售的IRGANOXTME17(a-维生素E)和IRGANOXTM1076(十八烷基3,5-二叔丁基-4-羟基氢化肉桂酸酯)。 Commodity antioxidants include, but are not limited to, Tarrytown, NY of Ciba Specialty Chemicals sold IRGANOXTME17 (a- vitamin E) and IRGANOXTM1076 (octadecyl 3,5-di-t-butyl-4-hydroxyhydrocinnamate ). 此外,与成膜工艺、拉伸和任何后续层合步骤相容的其它稳定剂或添加剂也可用于本发明。 Moreover, with the film-forming process, other stabilizers or additives stretching and any subsequent lamination steps may also be compatible with the present invention. 例如,可加入附加添加剂使膜具有所需特性,如熔体稳定剂、加工稳定剂、热稳定剂、光稳定剂、热老化稳定剂和本领域内已知的其它添加剂。 For example, additional additives may be added to the film with the desired properties, such as melt stabilizers, processing stabilizers, heat stabilizers, light stabilizers, heat aging stabilizers and other additives known in the art. 一般地说,亚磷酸盐稳定剂(即Tarrytown,NY,Ciba Specialty Chemicals公司出售的IRGAFOS168和Dover化学公司,Ohio,Dover出售的DOVERPHOS)是良好的熔体稳定剂,而受阻胺稳定剂(即Tarrytown,NY,Ciba Specialty Chemicals公司出售的CHIMASSORB944和119)是良好的热和光稳定剂。 Generally, phosphite stabilizers (i.e., Tarrytown, NY, Ciba Specialty Chemicals sold IRGAFOS168 and Dover Chemical Company, Ohio, Dover sold DOVERPHOS) are good melt stabilizers whereas hindered amine stabilizers (i.e., Tarrytown , NY, Ciba Specialty Chemicals sold CHIMASSORB944 and 119) are good heat and light stabilizers. 一种或多种上述稳定剂的包装有商品可购,如Ciba Specialty Chemicals公司出售的B900。 One or more of the above stabilizers are commercially available package, such as Ciba Specialty Chemicals sold B900. 优选在挤出前的基础聚合物中加入约100-2000ppm稳定剂(相对于每百万份填充膜总重量的份数)。 Preferably added in the base polymer prior to extrusion of from about 100-2000ppm stabilizer (parts per million relative to the total weight of the filler film parts).

芯层的低性能弹性体的存在量可以是芯层的约35-50重量%,优选填料的存在量是芯层的约50-65重量%。 Present in an amount low performance elastomer core may be about 35-50% by weight of the core layer, the filler is preferably present in an amount from about 50-65% by weight of the core layer.

或者,也可以将较高性能弹性体苯乙烯-基嵌段共聚物与弹性较差的芯材共混,以提高总体弹性性能(即提高拉伸和回复性能)。 Alternatively, the high performance elastomer may be a styrene - based block copolymer and the core material are less flexible blended in order to improve the overall elastic properties (i.e., improved stretch and recovery properties). Shell化学公司以Kraton牌出售这种材料。 Shell Chemical Company Kraton cards sell this material. 合适的Kraton弹性体包括KratonG1657。 Kraton suitable elastomers include KratonG1657. 如果将一种苯乙烯基嵌段共聚物材料与低性能弹性体共混,则优选其存在量是芯层的约5-20重量%。 If one of the styrene-based block copolymer material with lower performance elastomer blends, the core layer is preferably present in an amount of about 5 to 20 wt%.

多层产品膜10c可包括1层或2层皮层,这取决于膜的最终用途。 Multilayer product film 10c may include a skin layer or two layers, depending on the end use of the membrane. 例如,双层膜可能更有利于避免膜的粘连。 For example, it may be more beneficial to avoid double membrane adhesion film. 3层膜可能更有利于需要平面而不会出现表面屈曲的应用。 3-layer membrane may be more conducive to the plane and will not require the application of surface buckling occurs. 皮层优选包含一种第二弹性体,即一种高性能弹性体和/或弹性体共混物。 Preferably the skin layer comprising a second elastomer, i.e., a high-performance elastomer and / or elastomer blends. 优选皮层由热塑性聚氨酯(TPU)或聚醚酰胺组成。 Preferably the skin layer of thermoplastic polyurethane (TPU) or polyether amide composition. 合适的热塑性聚氨酯可购自Dow化学公司,商品名为Pellethane2103-70A,或购自BF Goodrich公司,商品名为Estane58245。 Suitable thermoplastic polyurethanes available from Dow Chemical Company under the tradename Pellethane2103-70A, or purchased from BF Goodrich Company under the tradename Estane58245. 合适的聚醚酰胺可购自Elf Atochem公司,商品名为Pebax2533和4033。 Suitable polyether amides available from Elf Atochem Company, tradename Pebax2533 and 4033. 或者皮层也可包括这类较高性能弹性体或其它较高性能弹性体的共混物,在芯层与皮层间起增容剂的作用。 Or skin layer may also include blends of such high performance elastomeric or other high performance elastomer, between the core layer and the skin layer plays the role of a compatibilizer. 所述其它高性能弹性体包括苯乙烯基嵌段共聚物,如前所述由Shell公司以Kraton牌出售的那些。 The other high-performance elastomers include styrene-based block copolymers, those described previously by Shell company Kraton cards sold. 此外,皮层中也可包括某些起防粘剂作用的填料。 In addition, the cortex may also include some filler plays the role of the release agent. 这类填料包括前述那些。 Such fillers include those aforementioned. 特别适用的皮层防粘剂包括硅藻土,例如Celite公司以Superfloss出售的那些。 Particularly suitable anti-blocking agent comprises diatomaceous earth cortex, for example, the company Superfloss Celite those sold. 如果皮层中存在这种填料,则优选它们的存在量是皮层的约1-15重量%,但更优选约10%。 If the presence of such fillers in the cortex, it is preferred that they be present in an amount of about 1-15% by weight of the skin layer, but more preferably about 10%.

在本发明的另一个实施方案中,皮层还可包括一种增容剂,用于不相似的皮和芯材料的膜共挤出。 In another embodiment of the present invention, the skin layer may also include a compatibilizer, the skin and the core material film dissimilar for coextrusion. 使用多层共挤出聚烯烃和其它非极性材料在包装和其它薄膜应用领域内是普遍的。 Multilayer co-extrusion of polyolefin and other non-polar materials in packaging and other applications are common films. 但为了共挤出不相容材料,例如极性与非极性材料,一般需要连接层材料。 However, in order coextruded incompatible materials, such as polar and non-polar material, generally need to connect the layer material. 如果不用连接层,则两种不相似材料就不能很好地粘结在一起,膜会脱开。 If you do not have the connection layer, the two dissimilar materials can not be bonded together well, the film will be disengaged. 按照本发明,业已发现,当在多层膜的皮层中加入丙烯酸甲酯含量高的乙烯/丙烯酸甲酯(EMA)共聚物时,皮层与芯层间的粘结性得到了改善。 According to the present invention, it has been found that, when methyl acrylate content of the ethylene / methyl acrylate in the cortex of the multilayer film (EMA) copolymer, the adhesion between the skin layer and the core layer is improved. 优选丙烯酸甲酯的含量超过约20%。 Methyl acrylate content is preferably in excess of about 20%. EMA起增容剂作用,有助于两种不相容材料之间的粘结。 Plays the role of a compatibilizer EMA helps bond between the two incompatible materials. 基本上,在多层中之一层中加入EMA后,极性与非极性材料就可共挤成多层膜。 Basically, after EMA is added in multiple layers of the layer, polar and non-polar materials can be coextruded into a multilayer film. 其优点是生产具有一种以上材料性能的单一膜。 The advantage is the production of a single film having one or more material properties.

关于这一点,2层或更多层至少两种不相容材料可一起挤出成具有ABA,ABC,AB和任何其它异构(permutation)形式的多层膜,其中A代表一种材料,B代表一种与A不相容的第二材料,以及C代表另一种不相似和不相容的材料。 In this regard, two or more layers of at least two incompatible materials may be extruded together to have an ABA, ABC, AB, and any other isomers (permutation) in the form of a multilayer film, wherein A represents a material, B represents a second material incompatible with A, and C represents another dissimilar and incompatible materials. 对于EMA树脂,优选在薄膜挤出前先混合或干共混进至少一种材料中。 For EMA resin, preferably first mixed or dry blended into the at least one material prior to film extrusion. 为促进必要的粘结性,优选EMA的用量足够高,但不要高到有损皮层主要材料所需的性能。 To promote the necessary adhesion, the preferred amount of EMA is high enough, but not so high as to undermine the main material properties required cortex. 因此优选EMA的存在量是皮层重量的约15-50%。 Therefore preferably present in an amount of from about 15 to 50% EMA cortex weight. 适用的EMA可以从Exxon化学公司购得,商品名为Exxon OptemaTC221 EMA。 Suitable EMA commercially available from Exxon Chemical Company under the trade name Exxon OptemaTC221 EMA. Exxon Optema EMA所含的丙烯酸甲酯百分率高,因此较软、较粘,但更富弹性。 Exxon Optema EMA contained a high percentage of methyl acrylate, so soft, sticky, but more flexible. 它也有一定的透气性且与非极性支持层粘结良好。 It also has a certain permeability and non-polar support layer with good adhesion. 相比之下,虽然已用在皮层中的EVA会与非极性材料粘结,但它的降解温度比EMA的低。 In contrast, although has been used in the cortex of EVA material with the non-polar bond, but it's lower than the degradation temperature of the EMA. 因此,它时常在挤出机口模唇处降解,需要刮除清理,从而降低了生产效率。 Therefore, it is often in the extruder die lip degradation requires the wiper cleaner, thereby reducing production efficiency.

因此将EMA加进至少一层皮层会提供下述优点:形成的整体膜同时兼具不止一种材料的性能而无需额外的胶粘层或在较厚的芯层中引入粘合剂材料。 Therefore EMA add at least one skin layer provides the following advantages: the overall film formation while both more than one material characteristics without introducing additional adhesive layer or an adhesive material in the thicker core layer. 在较薄的皮层中可以用较少量较昂贵和较高性能的弹性体,而在较厚的芯层中可以用较大量不贵的低性能弹性体。 In the thin skin layer may be relatively small amount of the more expensive and higher performance elastomer in the core layer may be thicker than the large number of inexpensive, low performance elastomer.

图1中产品膜10c的总厚度优选在0.6-1.2mm之间,更优选约1.0mm。 The total thickness of the product film 10c in FIG. 1 is preferably between 0.6-1.2mm, more preferably about 1.0mm. 皮层的总厚度优选不超过该膜总厚度的3%或在约0.018-0.04mm之间(每一皮层约0.009-0.02mm),而产品膜的芯层厚度占膜总厚度的约97%。 The total thickness of the skin layer is preferably not more than 3% of the total thickness of the film or between about 0.018-0.04mm (each skin layer about 0.009-0.02mm), and a core layer of the film thickness of the product accounted for about 97% of the total film thickness. 业已发现产品膜在约50%最终伸长率时尤其表现出提高的弹性与透气性的结合,最终伸长率如下文定义。 It has been found that when the product film is about 50% of the final elongation in particular exhibit improved flexibility and breathability of the binding, the final elongation as defined below. 皮层还有助于避免口模唇处的积料。 Cortex also helps avoid product material at the die lip.

优选透气的产品膜10c包含一层WVTR至少为1,000g/m2/24小时的填充阻隔膜,优选超过1,200g/m2/24小时,1,500g/m2/24小时或甚至2,000g/m2/24小时。 Preferably breathable product film 10c comprises a layer of WVTR of at least 1,000g / m2 / 24 hr filled barrier film, preferably more than 1,200g / m2 / 24 小时, 1,500g / m2 / 24 hours, or even to 2,000g / m2 / 24 小时. 此外,透气的拉伸填充产品膜的基重优选小于约60g/m2,甚至更优选在约15-40g/m2。 In addition, breathable stretched filled product film is preferably less than the basis weight of about 60g / m2, even more preferably from about 15-40g / m2. 优选未拉伸前体膜的基重(basis weight)约100g/m2或更少,以及总厚度约3mm。 Preferably not stretched precursor film basis weight (basis weight) of about 100g / m2 or less, and a total thickness of about 3mm.

这种多层膜10c可以用成膜工业中一般技术人员熟知的多种方法形成。 This multi-layer film 10c can use a variety of industrial deposition methods well known to one of ordinary skill in the formation. 两种特别优越的工艺是流延膜共挤出工艺和吹塑膜共挤出工艺。 Two kinds of processes are particularly advantageous cast film co-extrusion blown film co-extrusion process and technology. 在这类工艺中,同时形成2层或3层并以多层方式从挤出机挤出来。 In such processes, two or three layers are formed simultaneously and in a multilayer manner be extruded from the extruder. 由于按照本发明的多层膜特别薄的性质,证明这类工艺很可能是最优越的,虽然也可以用分立的挤出工艺形成多层膜。 Since the multilayer film according to the present invention is particularly thin nature, such processes are likely to prove most advantageous, although it could use a separate extrusion process to form a multilayer film. 为得到有关这类工艺更多的信息,见,例如,授予Mays的美国专利4,522,203和授予Hill的专利4,734,324,这些专利全文引入于此以供参考。 To obtain more information about the type of process, see, for example, US Patent 4,522,203 granted to Mays Hill and granted patents 4,734,324, which patent is incorporated herein by reference.

形成多层产品膜10c的工艺如附图3所示。 Process of forming the multilayer product film 10c as shown in Fig 3. 但是,在制造前体膜10a之前,原材料,即聚合物与填料必须首先通过本领域内技术人员公知的工艺进行混合。 However, before manufacturing the precursor film 10a, the raw material, i.e. the polymer must first be mixed with a filler by those skilled in the well known process. 例如,可以将原材料干混在一起然后加进双螺杆挤出机的料斗。 For example, you can mix and then add the dry material into the hopper of a twin-screw extruder machine. 在料斗中,材料分散地混合在熔体中并在间断性旋转螺杆作用下输运。 In the hopper, mixed and transport material is dispersed in the melt at intermittent rotation of the screw effect. 从双螺杆挤出机出来时,立即冷却该材料并切成粒状。 From the time out of a twin screw extruder, the material is immediately cooled and cut into granules.

再参考附图,多层前体膜10a由共挤出膜设备40如一个流延或吹塑单元成形,如前所述。 Referring again to the drawings, the multilayer precursor film 10a by a coextrusion film apparatus 40 such as a casting or blow-molding unit, as previously described. 一般地说,设备40包括两台或多台聚合物挤出机41。 Generally speaking, the device 40 includes two or more polymer extruders 41. 混合好的材料首先进入膜挤出机(料斗)。 First mixed material into the film extruder (hopper). 一般地说,用于皮层的材料加进一台较小的挤出机,而用于芯层的材料加进一台较大的主挤出机。 Typically, the material used for the skin layer were put into a small extruder, and the material for the core layer were put into a large main extruder. 如本领域内技术人员熟知,但在这里为便于参考而描述,挤出机配备有一块合并且引导来自两台挤出机的料流进入一个薄膜口模模腔(40的下部)的流动板。 As well known to persons skilled in the art, but here for ease of reference and description, the extruder is equipped with a combined and guided stream from two extruders into the die cavity a film (40 of the lower portion) of the flow plates . 使用流动板是为了使来自较小挤出机(皮层)的料流分流并导向主挤出机料流的周围,从而把主挤出机的料流夹在其中。 The use of mobile board is to make a small stream from the extruder (cortex) of the shunt and guided around the main extruder streams, thus bringing the main stream of the folder in which the extruder. 多层(3层)流以这种方式流出挤出机口模的狭缝。 Multi-layer (Layer 3) in such a manner effluent stream extruder die slit.

多层膜10a被挤到一个刻花的冷却辊42上。 Multilayers 10a pushed onto a cooling roller 42 engraved. 从口模40流出的料流在冷却辊42上立即冷却。 Flowing out from the die 40 in stream 42 is immediately cooled on a cooling roll. 位于冷却辊附近的真空箱43产生一个沿辊表面的真空,以利于维持前体膜10a紧挨辊表面铺展。 Located near the cooling roll vacuum box 43 generates a vacuum along the roll surface, in order to facilitate the maintenance of the precursor film 10a close to the roll surface spreading. 此外,当前体膜围绕旋转辊移动时,空气刀和静电针44有助于强迫前体膜10a贴到冷却辊表面上。 In addition, the precursor film around a rotating roll moves, air knives and the electrostatic forcing needle 44 helps precursor film 10a is attached to the surface of the cooling roll. 空气刀是本领域内已知的一种装置,它将一股很高流率的空气流聚焦于挤出聚合物材料的边缘。 Air knife is a device known in the art, it is a high flow rate of an air flow is focused on the edge of extruded polymeric material. 结果是产生一种多层薄膜。 The result is to produce a multilayer film. 该前体膜10a可收集起来或经受进一步加工。 The precursor film 10a may be collected or subjected to further processing.

所述3层前体膜10a的结构,在刚形成时,总厚度约为2-3mm,基重约为100g/m2或更大。 The three-layer structure of the precursor film 10a, in the newly formed, total thickness of about 2-3mm, basis weight of about 100g / m2 or more. 每层皮层的起始厚度为0.03-0.13mm或更厚,加起来约占前体膜起始总厚度的约3-5%。 The thickness of each layer of the cortex starting 0.03-0.13mm or thicker, together accounting for about 3-5% of the total initial precursor film thickness.

将前体膜10a进一步加工使之透气。 The precursor film 10a further processing to make it breathable. 因此,将来自共挤出膜设备40的前体膜10a引到一个薄膜拉伸单元47,例如一个加工方向取向器或“MDO”,这是一套购自Providence,Rhode Island的Marshall &Williams公司的设备。 Thus, from the co-extruded film precursor film 10a 40 devices lead to a film stretching unit 47, such as a machine direction orienter or "MDO", which is a commercially available from Providence, Rhode Island in the Marshall & amp; Williams Company device. 设备47有许多拉伸辊46a-e,它们在膜的加工方向上逐渐拉薄多层膜,加工方向是整个工艺中膜的移动方向,如图3所示。 Device 47 has many draw rolls 46a-e, which progressively pull a thin multilayer film in the machine direction of the film, the machine direction is the moving direction of the film in the overall process, as shown in Figure 3. 虽然用5个辊示意了MDO,但应理解,辊的个数可以更多或更少,取决于所需的拉伸水平和各辊之间的拉伸程度。 Although the use of five rolls schematically the MDO, it is to be understood that the number of rollers can be more or less, depending on the desired degree of stretching and stretched horizontally between the rollers. 膜可以以单个或多个分立的拉伸操作进行拉伸。 Film may be single or multiple discrete stretching operations stretching. 优选将未拉伸填充膜(前体膜)拉伸到其原长的约3-约6倍,使拉伸膜10b松弛后的永久变形是膜原长的3-约5倍。 Preferably the unstretched filled film (precursor film) stretched to about 3 to about 6 times its original length, so that permanent deformation of the stretched film 10b after relaxation the film is 3 to about 5 times the original length.

再参考图3,加热辊46a和46b可起预热辊的作用。 Referring again to Figure 3, the heating roller 46a and 46b can play the role of preheating rolls. 前面几个辊将膜加热到略高于室温(90F)。 The first few rolls heated to a film slightly above room temperature (90 F). 慢辊46c以低于后继快辊46d的环向速度运转。 Slow roller 46c below the successor fast roll 46d velocity loop operation. 相邻辊的不同速度起拉伸填充前体膜10a的作用。 Different speeds of the adjacent rollers from the stretch to fill the role of the precursor film 10a. 拉伸辊的旋转速度决定膜的拉伸程度,从而影响透气性水平。 The rotational speed of draw rolls determines the degree of stretching the film, thus affecting the breathability level. 慢辊46c与快辊46d中一个或两个都要加热。 Slow roll 46c and 46d in the one or two rolls to be heated quickly. 拉伸后,可允许膜10b略加收缩和/或由一个或多个加热辊进一步加热或退火,例如由退火辊46e退火。 After stretching, the film 10b may be allowed to slightly shrink and / or by one or more heating rolls further heated or annealed, e.g., by annealing the annealing rollers 46e. 这些辊一般都加热到约120F以退火薄膜。 These rolls are generally heated to about 120 F to anneal the film. 膜从MDO出来并使之松弛后,它包含一个较之前体膜一般为膜原长3-5倍的永久变形/伸长率。 After the film and make it come out from MDO relaxation, which contains a more film before the film is generally 3-5 times the original length of the permanent deformation / elongation. 这一最终总伸长使产品膜具有透气性并至少在加工横向上有一个最高约50%的附加伸长。 The final total elongation of the product and at least a breathable film in the machine transverse direction up to about an additional stretch of 50%.

在从MDO膜拉伸单元47出来后,透气产品膜的最大厚度优选约为0.6-1.2mm,以及皮层最大总厚度优选不超过约0.018-0.04mm,也就是加起来约为整个膜的约3%。 After the MDO film stretching unit 47 out of a maximum thickness of preferably breathable product film is about 0.6-1.2mm, and maximum total thickness of the skin layer is preferably no more than about 0.018-0.04mm, add up to about the entire film is about 3 %. 这时,可将拉薄的填充产品膜卷绕起来储存或作进一步加工。 At this point, you can pull a thin film wound up filling product storage or for further processing. 然后产品膜本身能在CD方向上被拉伸一个附加伸长率,例如,最多约50%,以及在MD方向上有一些附加伸长率。 Then the product of the film itself can be an additional tensile elongation in the CD direction, e.g., up to about 50%, as well as some additional elongation in the MD direction.

如果需要,可以将形成的多层产品膜10c粘着到一层或多层支持层30上,例如纤维层上,以形成多层膜/层合材料32。 If the multilayer product film 10c need, may be formed of one or more layers adhered to the support layer 30, e.g., the fibrous layer to form a multilayer film / laminate 32. 合适的层合材料包括无纺织物、多层无纺织物、纱布、纺织物和其它类似的材料。 Suitable laminate materials include nonwoven fabrics, multi-layer non-woven fabric, gauze, woven fabric, and other similar materials. 为了使层合材料具有更好的身体舒适性,优选纤维层是一种可伸长织物,甚至优选是一种弹性织物。 In order to make laminates having a better body comfort, is preferably extensible fiber layer is a fabric, even more preferably is an elastic fabric. 例如,在MD方向上拉伸无纺织物使织物“颈缩”或在CD方向变窄,使缩颈织物在CD方向具有可伸长性。 For example, stretching in the MD direction of the nonwoven fabric so that the fabric "necking" or narrowing in the CD direction, so that the constriction fabric having stretchability in the CD direction. 其它适合的可拉伸和/或弹性织物的实例包括,但不限于,下列专利中所述的那些:授予Meitner等人的美国专利4,443,513;授予Morman等人的5,116,662;授予Morman等人的4,965,122;授予Morman等人的5,336,545;授予Vander Wielen等人的4,720,414;授予Kieffer等人的4,789,699;授予Taylor等人的5,332,613;授予Collier等人的5,288,791;授予Wisneski等人的4,663,220;以及授予Shawver等人的5,540,976,上述专利均全文引入于此以供参考。 Suitable stretchable and / or elastic fabric Other examples include, but are not limited to, those described in the following patents: granting Meitner et al., U.S. Patent No. 4,443,513; 5,116,662 granted to Morman, et al; 4,965,122 granted to Morman, et al; Morman, who granted 5,336,545; grant Vander Wielen et al. 4,720,414; 4,789,699 granted to Kieffer et al; Taylor et al., 5,332,613 grant; Collier et al granted 5,288,791; 4,663,220 grant Wisneski et al; and 5,540,976 granted Shawver et al. , the above patents are incorporated herein by reference.

优选拟层合到所述多层膜上去的无纺织物的基重为约10g/m2-约70g/m2,甚至优选约15g/m2-34g/m2。 Quasi preferably laminated to the multilayer film basis weight of the nonwoven fabric up to about 10g / m2- about 70g / m2, even more preferably from about 15g / m2-34g / m2. 作为一个具体实例,一种17g/m2(0.5盎司/码2)的聚丙烯纺粘纤维织物可以缩颈一个所需的量然后层合到透气可伸长填充产品膜10b上。 As a specific example, one kind of 17g / m2 (0.5 oz / yd 2) polypropylene spunbond fabric can be a desired amount of constriction and then laminated to the extensible breathable filled film product 10b. 为此要将产品膜10b在双辊间隙中(压延辊部装件的层合辊内)夹成颈缩的或CD方向可拉伸的纺粘无纺织物。 To this end product film 10b in a double roll gap (calender roll-assembly within the laminator roll) clip into the necked direction or CD stretchable spunbond nonwoven fabric.

膜与纺粘材料一般都在膜从MDO出来的同时进入层合辊。 Film and spunbond material are generally in the film from MDO out simultaneously enter laminating rollers. 无纺外层可以用本领域内已知的一种或多种方法层合到透气填充产品膜上去。 The nonwoven outer layer known in the art may be used one or more of the product laminated to a breathable film filled up. 通过施以热能、超声能、微波能和/或压缩力或压缩能,向膜和/或纤维织物提供足够的能量,使材料软化和/或流动,可将无纺层和填充膜粘结,例如,点粘结在一起。 By subjected to heat, ultrasonic energy, microwave energy and / or compressive force or compression energy, to provide sufficient energy to the film and / or fabric, and the material to soften and / or flow, can be bonded nonwoven layer and the filler film, For example, point bonded together. 粘结剂或增粘剂可涂在膜上以提高层间粘结性。 Adhesive or tackifier may be coated on the film to enhance interlayer adhesion. 在本发明的又一个方面,可以用粘合剂将填充膜与纤维层彼此层合在一起。 In yet another aspect of the invention, the membrane can be filled with an adhesive to each other with the fiber layer laminated together. 为了提高悬垂性(drape),优选粘合剂以花样涂布到织物之一上或仅仅涂布到外纤维层上。 In order to improve drape (drape), preferably adhesive pattern applied to one of the fabrics or applied only to the outer fibrous layer. 将粘合剂涂布到外纤维层如无纺织物上,则粘合剂一般仅在纤维接触点上盖住膜,因此使层合材料具有提高的悬垂性和/或透气性。 Applying an adhesive to the outer fibrous layer, such as nonwoven fabric, the adhesive film is generally covered only on the fiber contact points, thus making laminates having improved drape and / or breathability. 适用的粘合剂的实例包括,但不限于,Salt Lake City,UT,Huntsman公司的REXTACTM2730;Wauwatusa,WI,Findley Adhesives公司出售的苯乙烯嵌段共聚物粘合剂,H2525A;以及Bridgewater,NJNational Starch,Starch andChemical公司出售的苯乙烯嵌段共聚物粘合剂34-5610。 Examples of suitable adhesives include, but are not limited to, Salt Lake City, UT, Huntsman's REXTACTM2730; Wauwatusa, WI, Findley Adhesives styrene block copolymer adhesives sold, H2525A; and Bridgewater, NJNational Starch , Starch andChemical sold styrene block copolymer binder 34-5610. 适用于本发明的热熔体粘合剂中所用的商品无定形聚α烯烃(APAO)包括,但不限于,产自Salt Lake City,UT,Huntsman公司的REXTACTM乙烯-丙烯APAO E-4和E-5,以及丁烯-丙烯BM-4和BH-5,以及产自Marl,Germany Huls AG公司的VESTOPLASTM792。 Product amorphous poly α-olefin (APAO) suitable for hot-melt adhesive used in the present invention include, but are not limited to, produced in Salt Lake City, UT, Huntsman's REXTACTM ethylene - propylene APAO E-4 and E -5, and butene - propylene BM-4 and BH-5, and produced in Marl, Germany Huls AG company VESTOPLASTM792. 在叠合支持层与填充膜之前优选将约1g/m2-约10g/m2粘合剂涂布在纤维支持织物上。 Before supporting layer laminated film is preferably filled with fibrous support fabric will be about the 1g / m2- about 10g / m2 adhesive is applied. 也可以用附加粘结助剂或增粘剂。 Can also use an additional binder additive or a tackifier.

再参考图3,该图示意了一个从预制可拉伸无纺材料产生3层层合材料(见图2)的工艺。 Referring again to Figure 3, this figure illustrates a 3-layer laminate material produced from the preform can be stretched non-woven material (see FIG. 2) of the process. 图中表示拉伸填充产品膜10b正在粘着到一个可拉伸纤维层30,例如缩颈(necked)纺粘织物上去,以形成一种膜/无纺层合材料。 There is shown stretched filled product film 10b is adhered to a stretchable fibrous layer 30, for example, the constriction (necked) spunbond up to form a film / nonwoven laminate. 可缩颈材料30从供料辊62上退绕下来。 Can necking material 30 from a supply roll 62 unwound. 然后该可缩颈材料30沿相关箭头所示方向移动,以反S形包复路径通过由一组辊68和70形成的S-辊装置66的间隙64,如与组合辊68和70相关的箭头所示。 The material can then constriction 30 to move in the direction of the arrow shown related to the anti-S-clad path through the gap 66 by a set of rollers 68 and 70 S- roll forming device 64, such as the combination of rollers 68 and 70 related arrows. 由于S-辊装置66中辊的周向速度可以控制到慢于下游压延辊组装件58的周向线速度,如图3所示,该可颈缩材料受到拉伸而颈缩所需的量。 Since S- roll arrangement 66 in the circumferential speed of the roller can be controlled to be slower than the downstream calender roll assembly 58 of the circumferential linear speed, shown in Figure 3, the neckable material is stretched and the desired amount of shrinkage neck . 可颈缩材料30也可以离线成颈并在张紧的颈缩条件下退辊。 Neckable material 30 may also be off-line into the neck and under the conditions of the tensioned necked back roller. 当缩颈材料30在喷雾设备72下面通过时,维持在张紧缩颈条件下,喷雾设备把粘合剂73通过口模头74喷至缩颈材料30上。 When the material 30 in the neck below the spray device 72 by, maintained under tension constriction condition, the adhesive spray device 73 through a die head 74 sprayed onto the necked material 30. 一旦拉伸填充产品膜10b已经拉到足够薄、缩颈材料30已形成和粘合剂已涂布在其上,则这些层就被带到一起并对粘合剂进行活化/处理(如果必要可加热),从而形成如图2所示的透气层合材料32。 Once the stretched filled product film 10b has been pulled sufficiently thin, the constriction 30 has been formed and a binder material has been applied thereon, these layers can be brought together and the adhesive activated / treated (if necessary heated), thereby forming a gas-permeable layer 2 as shown in FIG composite material 32.

或者,也可采用常用的纤维无纺织物形成设备,如一对纺粘机(未示出)以在线工艺形成支持层30。 Alternatively, the use of common fibrous nonwoven fabric forming apparatus, such as a pair of spunbond machines (not shown) to the supporting layer 30 is formed on-line process. 在这样的在线工艺中,长而基本连续的纤维就作为未粘结织物沉积在成形线。 In such an in-line process, the long and continuous fibers substantially unbonded fabric as deposited on the forming wire. 然后将该未粘结织物送过一对粘结辊以使纤维粘结在一起并增加所得织物支持层的撕裂强度。 The unbonded web is then sent through a pair of bonding rollers so that the fibers together and increase the tear strength of the resulting fabric as a support layer. 辊中之一或两个可以加热以促进粘结。 One or both rollers may be heated to promote bonding. 一般地说,其中一个辊也是刻花的,从而为织物提供一个粘结表面积达到预设值的分立粘结花样。 In general, one of the rollers is engraved so as to provide an adhesive bonding pattern of discrete surface area reaches a preset value of the fabric. 另一个辊通常是一个光滑的支承辊,但如果需要该辊也可以是刻花的。 Another roll is usually a smooth anvil roll, but if desired the roller may also be carved in. 一旦多层产品膜已充分拉薄并取向且支持层已经形成,则就将该两层带到一起并用一对层合辊或其它手段使它们彼此层合。 Once fully pull multilayer thin film products and orientation and support layer has been formed, it would bring the two together and using a pair of laminating rollers or other means to make them laminated to each other.

如同粘结辊一样,层合辊58也是加热的。 As with the bonding rolls, as laminating roller 58 is heated. 同样,其中至少一个辊可以是刻花的,以使所得层合材料产生一个具有预设粘结表面积的分立粘结花样。 Similarly, wherein the at least one roll may be engraved in order to produce the resulting laminate having a bonding surface area preset discrete bonding pattern. 对于层合材料一面上给定的表面积,最大粘结点表面积将不超过总表面积的约50%。 For a given surface area of the laminate on one side, the maximum bond point surface area will not exceed about 50% of the total surface area. 可用的分立粘结花样有很多,例如H&P粘结花样、C-星粘结花样或婴儿制品粘结花样。 Available discrete bond pattern there are many, such as H & amp; P bond pattern, C- Star bond pattern or baby products bonding pattern. 见,例如,Brock等人的美国专利4,041,203,该专利全文引入于此以供参考。 See, e.g., Brock et al., U.S. Patent No. 4,041,203, which patent is incorporated herein by reference. 一旦层合材料从层合辊中出来,就将其卷绕到一个辊上供后续加工。 Once the laminate from the laminating rolls, it will be wound into a roll for reference by subsequent processing. 或者该层合材料也可以继续在线作进一步加工或转化。 Or the laminate can be continued for further processing or conversion line.

图3所示的工艺也可用来产生如附图2所示的3层层合材料32。 Process shown in Figure 3 can also be used as shown in Fig 2 to produce a three-layer composite material 32. 它较之前述工艺的唯一改进是,将一种第二无纺织物支持层30a的供料63喂到多层产品膜10b上与另一层纤维无纺织物支持层30相对的一面上的层合辊58中。 It is compared with the aforementioned process only improvement is that the support of a second nonwoven fabric layer 30a to the feed 63 to feed the multilayer product film 10b and another layer of fibrous non-woven fabric support layer 30 on the opposite side of the layer sealing roll 58. 如图3所示,支持层30是以预成型辊62的形式供料的。 As shown in Figure 3, the support layer 30 is preformed in the form of feed roller 62. 或者,如同其它层一样,支持层30也可以直接在线形成。 Or, as another layer, the support layer 30 can also form a direct line. 在任何一种情况下,都是将第二支持层30喂进层合辊58中,并以与第一支持层30相同的方法层合到多层产品膜10c上去。 In either case, the second support layer 30 is fed into the laminating rolls 58 and 30 with the first support layer laminated to the same manner as the multilayer product film 10c up.

如前所述,一旦形成层合材料32,则该材料就不断地卷到卷绕机上。 As described above, once the laminate 32 is formed, the material is continuously wound onto the winding machine. 随着材料移向卷绕机,允许它收缩。 As the material moves to the winder, allowing it to shrink. 这是通过减慢卷绕辊的速度以调节材料的收缩量来实现的。 This is achieved by slowing the speed of the winding roller to adjust the amount of shrinkage of the material to achieve. 该工艺允许材料在加工方向上的拉伸,因为纺粘纤维已与收缩膜“捆绑”在一起了,因此当成品层合膜32受加工方向的拉伸时,它具有“弹力”。 This process allows the material to stretch in the machine direction, as with spunbond fibers have shrink film "bundled" together, so that when the finished laminated film 32 is stretched in the machine direction, it has a "elastic."

如前所述,层合材料32中的多层产品膜10b和多层产品膜10c可以用于许多种广泛应用中,其中至少包括个人护理品如尿布、训练短裤、失禁用品和妇女卫生用品如月经带等。 As described above, laminate 32 multilayer product film 10b and the multilayer product film 10c can be widely used in many kinds of applications, including at least personal care products such as diapers, training pants, incontinence products, and feminine hygiene products such as Menstrual belt. 附图4示意了一个典型制品80,在这种情况下是一块尿布。 Figure 4 illustrates an exemplary article 80, in this case a diaper. 参考图4,大多数这类个人护理吸水性制品80都包括一层可渗液顶层或衬里82,一层背层或外层84以及一个置于顶层82与背层84之间并容纳在其中的吸水芯86。 Referring to Figure 4, most such personal care absorbent article 80 includes a liquid-permeable top layer or liner 82, or outer layer of the backsheet 84 and between the top layer 82 and a backing layer 84 disposed and accommodated therein The absorbent core 86. 尿布之类的制品80也可以包括某种扣结件88,例如粘合剂扣系或机械勾和环型扣结件。 Diapers article 80 may also include a snap junction member 88, such as an adhesive or snap-based hook and loop type fastener mechanical junction member.

多层产品膜10c本身或以其它形式,例如多层膜/支持层层合材料32可用来形成制品的各局部,包括,但不限于,顶片82和背片84。 Multilayer product film 10c itself or in other forms, such as the multilayer film / support layer laminate material 32 used to form each partial product, including, but not limited to, the topsheet 82 and backsheet 84. 如果这种膜要用来作衬里82,则很可能必须是带孔的或制成可渗液的。 If this film to be used as a lining 82, it is likely to be made available perforated or exudate. 当用多层膜/无纺层合材料32作为外层84时,通常将无纺织物面朝外背对使用者是有利的。 When using a multilayer film / nonwoven laminate 32 as the outer layer 84, typically the outer face facing away from the non-woven fabric is advantageous to the user. 此外,在这样的实施方案中,有可能用层合材料32的无纺部分作为勾与环组合的环部分。 Further, in such embodiments, it is possible to use non-woven laminate part 32 as hook and loop combination of ring portion.

本发明的多层膜和多层膜/无纺层合材料的其它用途包括,但不限于,外科帘和衣、毛巾、阻隔材料和衣服或其部分的服装/制品包括工作服和实验室外套在内。 Multilayer film of the present invention and multilayer film / nonwoven laminate material other uses include, but are not limited to, surgical curtain clothes, towels, clothing or portions thereof and the barrier material of the clothing / workwear and lab coats comprising article in inside.

以这种方式,可以将较高成本较高性能的弹性体材料少量地用于多层膜层合材料的皮层中以弥补在膜芯层中构成大部分膜的低性能弹性体的性能。 In this manner, the higher cost high performance elastomeric material used in a small amount of low performance elastomer properties cortex multilayer film was laminated material to cover up the majority of the film in the film core layer. 通过在皮层中采用较高性能的弹性体,膜能保留较高水平的透气性同时仍表现出弹性行为,特别在加工横向上有约50%的伸长率时。 By the use of higher performance elastomer in the skin layer, the film can retain a high level of breathability while still exhibiting elastic behavior, in particular about 50% extensibility in the transverse direction during machining. 尤其是,高性能弹性皮层将提高产品膜的收缩并减少永久变形,后者是收缩张力趋近于零时的伸长百分率。 In particular, high performance elastomeric skin layer will improve shrink film product and reducing permanent deformation, which is a shrink tension approaches zero percent elongation.

本发明将通过以下的试验实施例作进一步描述。 Embodiments of the present invention will be further described by the following test. 但是,这些试验实例决不会构成对本发明的精神或范围的限制。 However, these tests will never be construed as limiting examples of the spirit or scope of the invention.

试验熔体指数:熔体指数(MI)是聚合物在给定条件下粘度的量度。 Test Melt index: The melt index (MI) is a measure of the viscosity of the polymer at the given conditions. MI表示为材料在特定载荷或剪切速率作用下于一定测量周期内从已知直径的毛细管中流出的质量,按照ASTM试验1238-90b,在190℃和2160g载荷下进行测量,单位为g/10min。 MI represents a mass of material within a given measurement cycle effluent from the capillary tube of known diameter at a specific load or shear rate effect, according to ASTM test 1238-90b, at 190 ℃ and 2160g load is measured in units of g / 10min.

WVTR:试样的水蒸汽透过率(WVTR)按以下试验方法计算。 WVTR: Water vapor transmission rate (WVTR) of the sample is calculated according to the following test methods. 从每一种试验材料和一种对比材料上切取直径为3英寸的圆试样,对比试样取自Sommerville,New Jersey的Hoechst Celanese公司的一片CELGARD2500膜。 Cut from each of the test material and a contrast material diameter of 3 inches round specimen, compared to samples taken from Sommerville, New Jersey's Hoechst Celanese's a CELGARD2500 film. CELGARD2500膜是一种微孔聚丙烯膜。 CELGARD2500 film is a microporous polypropylene film. 对每一种材料准备3个试样。 Prepare three samples of each material. 试碟是Philadelphia,Pennsylvania的Thwing-Albert仪器公司销售的60-1Vapometer盘。 Test disc is Philadelphia, Pennsylvania's Thwing-Albert Instrument Company sold 60-1Vapometer plate. 在每个Vapometer盘中倒入100ml水,将每个试验材料与对比材料的各试样盖在各盘的敞口顶上。 100ml of water was poured into each Vapometer pan, and each sample of each test material and the comparative material in the open cover on top of the discs. 拧紧螺纹法兰,以便沿盘缘形成密封,让相关的试验材料或对比材料暴露在直径为6.5cm、暴露面积约33.17cm2圆形环境气氛中。 Tighten threaded flange to form a seal along the rim, so that the associated test material or contrast material is exposed to a diameter of 6.5cm, the exposed circular area of about 33.17cm2 ambient atmosphere. 将这些盘在温度约为100F(38℃)的鼓风烘箱中放置1小时以达至平衡。 These discs standing for 1 hour in order to achieve equilibrium at a temperature of about 100 F (38 ℃) in a forced air oven. 烘箱是恒温烘箱,外部空气循环通过其中以防止水蒸汽凝聚在其内。 Oven is heated in an oven, wherein the external air circulating through to prevent water vapor condensed therein. 一种合适的鼓风烘箱是,例如,Blue Island的Illinoes,Blue M.Electric公司销售的Blue M Power-O-Matic60烘箱。 A suitable forced air oven is, for example, Blue Island of Illinoes, Blue M.Electric marketed by Blue M Power-O-Matic60 oven. 达到平衡时,从烘箱中取出盘子,称重并立即送回烘箱。 At equilibrium, remove the plate from the oven, weighed and immediately returned to the oven. 24小时后,从烘箱中取出盘,再次称重。 After 24 hours, remove the tray from the oven and weighed again. 该初步试验水蒸汽透过率用以下方程计算:(1)试验WVTR=(24小时损失的重量,g)315.5g/m2/24小时烘箱内的相对湿度未专门控制。 The preliminary test water vapor transmission rate by the following equation: (1) Test WVTR = (weight loss of 24 hours, g) the relative humidity 315.5g / m2 / 24 小时 within the oven is not specifically controlled.

在约100F(38℃)和环境相对湿度等预设条件下,已确定CELGARD2500的WVTR是5000g/m2/24小时。 At about 100 F (38 ℃) and ambient relative humidity preset condition, have been identified CELGARD2500 the WVTR is 5000g / m2 / 24 hr. 因此在每次试验中都要同时试验对比试样并用以下方程(II)校正初步试验值:(II)WVTR=(试验WVTR/对比WVTR)(5000g/m2/24小时)剥离试验:在剥离和分层试验中,试验把层合材料的层拉开所需的张力大小。 Thus in each test and the comparative samples be tested simultaneously corrected preliminary test value by the following equation (II): (II) WVTR = (Test WVTR / contrast WVTR) (5000g / m2 / 24 hours) Peel test: In peel and hierarchical test, the test of the laminate layer tension required to pull the size. 剥离强度值用特定织物宽度、夹具宽度和恒定的拉伸速度获得。 Peel strength values with a specific width fabric, clamp width and a constant draw speed obtained. 对于有膜面的试样,用屏蔽带或某些合适的其它材料盖住试样的膜面,以免试验期间膜被撕裂。 For a sample film surface, with a shielding tape or some other suitable material covers the membrane surface of the sample, in order to avoid tearing the membrane during the test. 屏蔽带只要盖在层合材料的一面,因此不会对试样的撕裂强度有贡献。 As long as the cover shield band side in the laminate, it will not contribute to the tear strength of the sample. 试验用两个夹头将材料,通常是垂直地,夹持在同一平面内,分开2英寸,开始试验,每个夹头两个夹板,每个夹板有一面与试样接触。 Two chucks test material, usually vertically, holding in the same plane, two inches apart, the test began, each chuck two jaws, one surface of each plate has contact with the sample. 试样尺寸是4英寸宽,长度是使试样分层足够长度所必要的长度。 Sample size is 4 inches wide, the sample length is a sufficient length necessary for stratified length. 面朝试样的夹板尺寸是1英寸高,至少4英寸宽,恒定拉伸速率是300mm/min。 Jaw facing size is 1 inch high sample, at least 4 inches wide, a constant tensile rate of 300mm / min. 先用手将试样分层足够的量,以允许它被夹持到位,然后让夹头按特定拉伸速率移开以把层合材料拉开。 The sample was stratified by hand a sufficient amount to allow it to be clamped into place, and then let the chuck to remove a particular stretching rate of the laminate apart. 试样在两层间以180拉开,剥离强度以最大载荷平均值报告,单位为g。 Between two layers of the sample to 180 opened, the peeling strength is the maximum load mean value reported in units of g. 力的计量从层合材料已拉开16mm开始直到总分层为170mm。 Measurement of the force from the laminate has been kicked 16mm begin until the total stratification of 170mm. 1001Sheldon Dr.,Cary,NC27513,Sintech公司出售的Sintech2试验机、2500Washington St.,Canton,MA02021,Instron公司出售的Instron TM型或10906Dutton RD.,Phila.,PA19154,Thwing-Albert仪器公司出售的Thwing-Albert INTELLECT II型都可用于该试验。 1001Sheldon Dr., Cary, NC27513, Sintech sold Sintech2 tester, 2500Washington St., Canton, MA02021, Instron TM type Instron sold or 10906Dutton RD., Phila., PA19154, Thwing-Albert Instrument Company sold Thwing- Albert INTELLECT II type can be used for this test. 结果以3根试样的平均值报告,并可用横向(CD)或加工方向(MD)上的试样进行试验。 The results are the average of three samples of the report, and the available sample laterally (CD) or machine direction (MD) on the test.

伸长/回缩:Sintech试验包括一个两循环50%最终(目标)伸长率拉伸试验(即一个预设的伸长率点)和一个两循环100%拉伸试验,在50%拉伸试验中,取30%处第一循环的拉伸张力和第二循环的收缩张力,在100%拉伸试验中,取50%处第一循环的拉伸张力与第二循环的收缩张力。 Elongation / retraction: Sintech test comprises a two cycle of 50% final (target) Tensile elongation test (i.e., a preset elongation point) and a two-cycle 100% tensile test at 50% elongation experiment, take 30% of the first cycle of the second cycle of the draw tension and shrink tension, the tensile test at 100%, taking 50% of the first cycle of the second cycle of the draw tension and shrink tension. 对于50%最终伸长率试验,要将试样先伸长到50%的最终伸长率,然后使其收缩/回复到阻力为零的量。 For 50% of the ultimate elongation of the test, the sample to be stretched to the final elongation of 50%, then allowed to shrink / replies to the amount of resistance is zero. 试验在Sintech 1/S或2/S设备上进行,用Windows3.02下TESTWORKS软件记录数据。 Experiments on the Sintech 1 / S or 2 / S equipment, with the following Windows3.02 TESTWORKS software to record data. 在进行伸长/回缩试验时,将3英寸宽的试样材料夹持在夹头内(对于100%试验用3英寸标称长度,对于50%试验用4英寸标称长度)并以500mm/min的速率拉到50%或100%的目标伸长率,然后回到起始距离,一般是4英寸,作两次循环。 Performing elongation / retraction when test, a 3 inch wide sample material retained within the collet (100% test for a nominal length of 3 inches, for 50% of the nominal length of test 4 inches) and 500mm / min of pulling rate of 50% or 100% of the elongation of the target, and then return to the starting distance, usually 4 inches, for two cycles. 试验在室温和相对湿度条件下进行。 Tests carried out at room temperature and relative humidity conditions.

滞后按以下方程计算 Hysteresis is calculated according to the following equation 水头:织物对液体阻隔性的量度是水头(hydrohead)试验。 Head: a measure of the liquid barrier fabric is head (hydrohead) test. 水头试验确定织物在液体透过它之前所能支持的水的高度或水压(单位mbar)。 Head test to determine the fabric in liquid before it can be supported through the height of the water or water pressure (in mbar). 织物的水头读数较高表示它对渗液的阻隔能力比水头较低的织物要高。 Fabric head readings indicate a higher capacity than its lower exudate barrier fabric head higher. 水头可按照联邦试验标准191A方法5514进行。 Head in accordance with Federal Test Method Standard 191A 5514 conducted. 本文引用的水头数据是用类似于上述联邦试验标准获得的,但经修改并说明如下。 Head data referenced herein are above federal standards similar to those obtained in the test, but revised and are described below. 水头用Concord,NC,Marlo Enterprises公司的静水头试验机进行测定。 Head with Concord, NC, Marlo Enterprises company hydrostatic head test machine was measured. 试样受恒速增加的标准水压作用(与联邦试验标准中的水柱相反)直到在织物表面有三处分立的面积上出现泄漏。 Standard water pressure constant speed by increasing the sample (as opposed to the federal test standards in the water column) until leakage appears on the surface of the fabric with three penalties in the area of legislation. (夹头附近的边缘泄漏忽略不计)。 (Near the edge of the chuck leakage is negligible). 未受支持的织物,如薄膜,能加以支持以防试样过早断型。 Unsupported fabric, such as films, can be supported to prevent premature breaking type specimen. 试验实施例条件:将Elf Atochem Pebax4033和2533、Dow Pellethane2103-70A以及BF Goodrich Estane58245在混合前于150F干燥3小时。 Example Test Conditions: The Elf Atochem Pebax4033 and 2533, Dow Pellethane2103-70A and BF Goodrich Estane58245 dried for 3 hours at 150 F prior to mixing. 将Exxon OptemaTC EMA与许多试验化合物材料共混,以便在大多数极性皮层与非极性填充聚乙烯芯层共挤出时起到增容剂和粘结促进剂的作用。 The Exxon OptemaTC EMA material blended with many of the test compound to act as adhesion promoters and compatibilizers in the cortex at most polar to non-polar polyethylene filled core layer coextrusion. 对每一种试样,填料在混合前都涂有1重量%的硬脂酸涂层。 For each sample, the filler prior to mixing are coated with 1% by weight of stearic acid coating. 用一个双挤出机体系共挤出ABA型结构的皮层和芯层,“A”代表皮层而“B”代表芯层。 System with a dual-extruder coextrusion skin and core layers ABA type structure, "A" on behalf of the cortex and "B" on behalf of the core layer. 试验操作条件:对于芯层,目标熔体温度是420F,而皮层的目标熔体温度为380F。 Test Operating conditions: For the core, the target melt temperature is 420 F, and the target melt temperature of the skin layer 380 F. 应该指出,熔体温度随每一化合物熔体的流动而变。 It should be noted, with a melt temperature of the melt flow of each compound becomes. 为进行这些试验,MDO包括6个拉伸辊。 For these tests, MDO stretching rollers comprising six. 其中包括2个预热辊,2个快辊,标为F1和F2,以及2个退火辊,第二个退火辊标为A2。 Including the two warm-up roller, two fast rolls, labeled F1 and F2, and two annealing rolls, the second annealing rolls labeled A2. 层合辊跟在这6个辊之后并标为“Lam”。 Laminated roller follows the six rolls and labeled "Lam".

试验实施例芯层包括两个配方。 Test Example core layer comprises two formulations. 第一个配方标为P5492-106A(106A),包括20%Dow Engage EG8200,20%Dow Affinity PL1845,60%ECC Supercoat碳酸钙以及600ppm Irganox E17。 The first recipe is labeled P5492-106A (106A), including 20% Dow Engage EG8200,20% Dow Affinity PL1845,60% ECC Supercoat calcium carbonate and 600ppm Irganox E17. 第二个配方标为P5492-106E(106E),包括17.5%Dow Engage EG8200,17.5%Dow Affinity PL1845,10%Kraton G1657,55%ECCSupercoat碳酸钙以及600ppm Irganox E17。 The second recipe is labeled P5492-106E (106E), including 17.5% Dow Engage EG8200,17.5% Dow Affinity PL1845,10% Kraton G1657,55% ECCSupercoat calcium carbonate and 600ppm Irganox E17.

虽然第一个芯层与许多可能的皮层配方进行了试验,但第二芯层配方仅以EMA/Kraton和Pebax/Kraton共混物进行了试验。 Although the first core layer and the skin of many possible formulations were tested, but only the second core formulation EMA / Kraton and Pebax / Kraton blends were tested. 用源自Kimberly-Clark公司的45%缩颈聚丙烯无纺纺粘进行了3次拉伸和层合试验。 45% is from Kimberly-Clark Corporation polypropylene nonwoven spunbond constriction conducted 3 times stretched and laminated test. 在有些试验中,所用的纺粘纤维由标为“FPO”的柔性聚烯烃纺粘组成。 In some of the experiments, spunbond fibers used by labeled "FPO" flexible polyolefin spunbond composition. 术语“柔性聚烯烃”是指含有丙烯基聚合物、具有可控的无规立构聚丙烯单元区域以达到所需结晶度的聚烯烃材料,如授予Hetzler和Jacobs题为“含柔性聚烯烃的取向聚合物微孔薄膜及其制备方法”的美国专利5,910,136所述;其全文引入于此以供参考。 The term "flexible polyolefin" refers to a propylene-based polymer, have a controllable atactic polypropylene unit area to achieve the desired degree of crystallinity of the polyolefin material, such as granting Hetzler and Jacobs, entitled "Flexible polyolefins containing oriented polymer microporous film and preparation method, "the United States Patent 5,910,136; it is incorporated herein by reference.

可拉伸双组分纺粘织物(FPO/PP)在MD和CD方向上都具有拉伸性能。 Stretchable bicomponent spunbond (FPO / PP) in the MD and CD direction have tensile properties. 这种材料表现出50-75%的伸长率、柔软的手感、在环境FDU(纤维拉伸单元)温度下纤维卷曲以及传统纺粘的强度。 This material exhibits an elongation of 50-75%, a soft hand, in the environment FDU (fiber draw unit) at a temperature and traditional spunbonded fiber curl strength. 已生产了含聚丙烯与柔性聚烯烃并排组合(S/S)的片材。 Combination has produced side by side (S / S) in a sheet of polypropylene containing flexible polyolefin. 用于S/S双组分PP纺粘纤维中的FPO聚合物可以从Texas Rexene公司得到。 For S / S PP bicomponent spunbond fibers FPO polymers can be obtained from Texas Rexene Corporation. 同样,可以生产具有鞘/芯纤维组合(S/C)的片材。 Similarly, the sheet can be produced having a sheath / core fiber composition (S / C) of. 在这些材料中已用14μm或更大的纤维尺寸。 Among these materials have been used 14μm fiber size or larger. PP/FPO聚合物比可在50/50-70/30范围内。 PP / FPO polymer ratio can be 50 / 50-70 / 30 range. FPO/PP纺粘纤维可用来作一次性使用个人护理品如尿布内衬、尿布外罩、勾环扣结基等的可拉伸单元、缩颈纺粘材料的一种代用品、层合膜的一个组分以及希望会拉伸和回复的其它层合材料的一个组分。 FPO / PP spunbond fiber used to make disposable personal care products such as diaper liner, diaper cover, hook buckle knot group stretchable unit, a necking substitute spunbond material, laminated film component and a component of a stretch and recovery will want other laminated materials. 可拉伸双组分纺粘(FPO/PP)能用一步法在线制造。 Stretchable bicomponent spunbond (FPO / PP) can be one-step fabrication line. 由这种工艺生产的织物因固有的弹性而表现出拉伸后的回复。 Produced by this process due to the inherent elasticity of the fabric exhibit reply after stretching. 柔性聚烯烃的进一步描述可见诸于授予Sustic并Rexene公司的美国专利5,723,546。 Further description of flexible polyolefin sees it in U.S. Patent 5,723,546 Sustic and Rexene company. 特别是,这样的无纺片材包括Huntsman公司以REXFLEX FLEXIBLE POLYOLEFINS牌出售的可变形聚烯烃/聚丙烯双组分纺粘纤维(FPO/PP)。 In particular, this nonwoven sheet comprises Huntsman Company REXFLEX FLEXIBLE POLYOLEFINS brand sold deformable Polyolefin / polypropylene bicomponent spunbond (FPO / PP). 双组分纺粘是约70%聚丙烯和30%柔性聚烯烃。 Bicomponent spunbond is about 70% polypropylene and 30% of flexible polyolefin.

为分离各种皮层的作用,还拉伸并层合了用两种芯化合物配方的单层膜作为各自试验中的对比试样。 For the separation of various skin effect, and also stretched monolayer film laminated using two cores each test compound formulation as in the comparative sample. 对许多皮层配方进行了试验与评价,如下表1所列。 For many cortical recipes were tested and evaluated, as listed in Table 1 below.

表1-皮层配方 Table 1 - skin formula

试验实施例1条件:对第一次拉伸与层合试验,设定下列条件:MDO辊1-6温度 90F,90F,室温,110F,110F,室温粘合剂 Rextac2730,涂布量为2g/m2(gsm)退卷速度 63英尺/min(fpm)卷绕速度 可变F2/F1(速度比) 3.5倍Lam/A2(速度比) 0.92-0.88热熔体口模熔体温度 345F Condition 1 Test Example: for the first draw and laminated test, set the following conditions: MDO rolls 1-6 Temperature 90 F, 90 F, room temperature, 110 F, 110 F, room temperature adhesives Rextac2730, the coating amount of 2g / m2 (gsm) unwinding speed of 63 ft / min (fpm) take-up speed variable F2 / F1 (speed ratio) 3.5 times Lam / A2 (speed ratio) 0.92-0.88 hot melt port die melt temperature 345 F

热熔体口模空气温度 365F成型高度 3英寸粘结花样表面 250F(婴儿制品)本试验中所用的面层是从Kimberly-Clark公司获得的20英寸宽、45%缩颈的聚丙烯纺粘品。 Hot melt die air temperature 365 F forming height 3 inches bonding pattern surface 250 F (baby products) surface used in this test was obtained from Kimberly-Clark Corporation 20 inches wide, 45% of poly necking propylene spunbond products. 热层合步骤中用橡胶支承辊与婴儿制品刻花辊。 Thermal lamination step with rubber bearing rollers and baby products engraved rolls. 所有薄膜试样都是粘合剂层合,但只有6种薄膜能热层合。 All samples are adhesive laminated film, but only six kinds of films can be heat-laminated. 所有薄膜试样都能成功地用粘合剂层合到45%颈缩聚丙烯纺粘纤维上。 All film samples can be successfully combined with an adhesive layer to 45% necked polypropylene spunbond fibers. 应指出的是,Pellethane/EMA试样因辊的不良膜规均匀性而有一个硬边,这加剧了薄膜卷绕辊中的粘连。 It should be noted, Pellethane / EMA sample due to adverse regulatory uniformity of the film roll and has a hard edge, which exacerbates the film winding rollers adhesions. 将刻花辊温度从200F升到250F以改进热层合粘结性,但对任何热层合都未呈现足够的粘结性。 The engraved roller temperature rose from 250 F to 200 F heat laminated to improve adhesion, but none of any thermal lamination exhibit sufficient adhesion. 将薄膜拉伸到出现完全泛白。 The film was stretched to appear completely washed out. 这在F1/F2辊之间以3.0-3.5倍的比率进行。 This is between the F1 / F2 roller 3.0-3.5 fold ratios. 虽然在层合辊前已收缩了大部分,但稍稍降低缠绕速度以允许薄膜作残余收缩。 Although the lamination rolls shrink before the majority, but slightly lower winding speed to allow the film as residual shrinkage. 所得层合膜的最终伸长约为原长的2.5-2.7倍。 The resulting final stretch laminate film is about 2.5-2.7 times the original length. 在芯层中含Kraton的那类薄膜需拉伸到4.0倍才出现完全泛白。 In the core layer containing Kraton need the kind of film was stretched to 4.0 times appear completely washed out.

试验实施例2条件:对第二次拉伸与层合试验,设定下列条件:MDO辊1-6温度 90F,90F,室温,110F,110F,室温粘合剂 Rextac2730,涂布量为3gsm退卷速度 57fpm卷绕速度 随收缩而变F2/F1(速度比) 5.0倍-5.5倍Lam/A2(速度比) 0.95-1.0(随弹性增加而降低)热熔体口模熔体温度 345F热熔体口模空气温度 365F成型高度 3英寸在试验2中,测试了下述皮层配方与芯层配方1)EMA/Pebax4033共混物在第一芯层配方上2)EMA/Pebax2533共混物在第一芯层配方上3)EMA/Pellethane共混物在第一芯层配方上 Test Example 2 conditions: on the second tension and laminated test, set the following conditions: MDO rolls 1-6 Temperature 90 F, 90 F, room temperature, 110 F, 110 F, room temperature adhesives Rextac2730, the coating amount of the unwinding speed of 57fpm 3gsm winding speed with shrinkage becomes F2 / F1 (speed ratio) 5.0 times -5.5 times Lam / A2 (speed ratio) 0.95-1.0 (decreased with increased elasticity) Hot Melt die melt temperature 345 F hot melt die air temperature 365 F forming height 3 inches in Test 2, was tested by the following formula and the core layer skin Formulation 1) EMA / Pebax4033 blend in a first the core layer formulation 2) EMA / Pebax2533 blend on a first core formulation 3) EMA / Pellethane blend on a first core formulation

4)Kraton/Pebax4033共混物在第二芯层配方上5)EMA/Kraton共混物在第二芯层配方上6)以第一芯配方层作为对比物7)以第二芯配方层为为对比物在该试验中所用的面层是从Kimberly-Clark公司获得的45%缩颈聚丙烯纺粘纤维。 4) Kraton / Pebax4033 blend on the second core layer formulation 5) EMA / Kraton blend on the second core layer formulation 6) to the first core formulation layer as the contrast was 7) to a second core Formulations for surface layer is a layer of contrast material used in this test was 45% constriction of polypropylene spunbond fibers obtained from Kimberly-Clark Corporation. 对这类薄膜再次进行试验以实现非MD可伸长纺粘纤维的MD拉伸和CD拉伸。 For such films to be retested to achieve non-extensible spunbond fibers MD MD tensile and CD tensile. 将该拉伸薄膜边拉伸边用粘合剂层合到纺粘纤维上,并允许层合材料在缠绕到缠绕辊上之前发生收缩。 Stretching the stretched film side with an adhesive side was laminated to the spunbond fibers, and allows the laminate shrinkage occurs prior to winding on the winding roller. 这有利于薄膜/纺粘层合材料的MD可伸长性。 This facilitates a film / spunbond laminate of MD extensibility. 收缩率从12-26%MD不等,如表2所示,取决于缠绕辊/层合辊的速比。 Shrinkage ranging from 12-26% MD, as shown in Table 2, depending on the winding / roll ratio lamination roll. 因此所得薄膜的最终总伸长为4.0-4.9倍。 Thus the resulting film eventually total elongation of 4.0-4.9 times. 涂布的粘合剂从2-3gsm增加,以解决所得薄膜与纺粘纤维间适当粘结的问题。 Applying adhesive from 2-3gsm increased to resolve between the film and the resultant was properly bonded spunbond fibers. 将这些薄膜在它们顶上其它辊的压力之下储存,结果比先前的试样更易发生薄膜粘连。 These films are under pressure they are stored on top of the other roll, the results are more likely than the previous sample film adhesion. 因此,只能成功地层合5种薄膜。 Therefore, only the success laminating five thin film. 根据薄膜类型以及它粘着情况有多糟,稍稍改变操作条件。 The thin film type, and how bad it is sticky, slightly changing operating conditions. 测量这些材料在MD方向上的可伸长性。 These materials are measured in the MD direction extensibility. 应当指出,优选较大的MD伸长率值。 It should be noted that, preferably larger MD elongation values. 数据反映在下表2中。 Data in Table 2 below reflect.

MD可伸长率:基于加工方向的收缩率 MD can Elongation: Based on machine direction shrinkage

**些薄膜因分层而不能适当地进行循环试验试验实施例3条件:对第三次拉伸与层合试验设定下列条件。 ** These films due to stratification and can not be properly conducted test cycle test conditions Implementation Example 3: The third stretch with laminated test set the following conditions. 使用从Kimberly-Clark公司获得的柔性聚烯烃(FPO)纺粘纤维,FPO从Rexene公司获得。 Using a flexible polyolefin (FPO) obtained from Kimberly-Clark Corporation spunbond fibers, FPO obtained from Rexene Corporation.

MDO辊1-6温度 90F,90F,室温,110F,110F,室温粘合剂 Findley2525A,涂布1.5gsm退绕速度 42fpm卷绕速度 随收缩而变F2/F1(速度比) 4.75倍-5.0倍Lam/A2(速度比) 0.95-1.0(随弹性增加而降低)热熔体口模熔体温度 345F热熔体口模空气温度 365F成型高度 3英寸在试验实施例3中试验了下列皮层配方与芯层配方。 MDO rolls 1-6 Temperature 90 F, 90 F, room temperature, 110 F, 110 F, room temperature adhesives Findley2525A, coating 1.5gsm unwinding speed 42fpm winding speed with shrinkage becomes F2 / F1 (speed ratio) 4.75 times -5.0 times Lam / A2 (speed ratio) 0.95-1.0 (elasticity increases with decrease) hot melt die melt temperature 345 F hot melt die molding air temperature 365 F 3 inches in height Test Example 3 The following test formulation and the skin layer core layer formulation.

1)EMA/Pebax2533共混物与第一芯配方层上2)EMA/Pellethane共混物在第一芯配方层上3)KratonG1657/Pebax4033共混物在第二芯配方层上用Findley粘合剂粘结层合之后,似乎与柔性聚烯烃纺粘纤维粘结良好。 1) on the EMA / Pebax2533 blend formulations with the first core layer 2) EMA / Pellethane blend on a first core formulation layer 3) KratonG1657 / Pebax4033 blend in the second core formulation followed by Findley adhesive laminated on the adhesive layer, it seems that the flexible polyolefin spunbond good adhesion. 肉眼看不到薄膜上有任何空洞。 The naked eye can not see any holes on the film. 有Kraton共混芯层(106E)的薄膜表现出更好的弹性行为。 There Kraton blend core layer (106E) of the film exhibits better elastic behavior. Findley粘合剂相当粘且常常从纺粘纤维中渗出来,导致层合材料有些粘连。 Findley adhesive oozing quite sticky and often come from spunbond fibers, resulting laminate some adhesions. 业已观察到,这种粘合剂保持熔融态的时间比Rextac的长,有时熔融料条会聚结在一起并在薄膜上烧出小孔。 It has been observed, such a binder to maintain the molten state time longer than Rextac, sometimes melt strip bonded together and converging on the film to burn out the holes. 这些薄膜允许在缠绕辊前但在层合辊后充分收缩,以达到MD可伸长率。 These films allow the winding roller but before full contraction in the lamination roller, to achieve the MD can elongation. 薄膜中有少数几种需要在胶粘层合前略加收缩,以减少从MDO出来时薄膜的张力。 There are a few of the films in the adhesive needs to shrink slightly before lamination to reduce the tension out from MDO film. 减少张力有助于避免薄膜断裂。 Reduce tension helps to avoid breaking film. 这类薄膜表现出的MD收缩率为16.5-19%。 Such films exhibit the MD shrinkage rate 16.5-19%. 试验实施例试验小结A)层合试验实施例1在3-3.5倍伸长时的结果106A芯层对比试样的薄膜的基本透气性表现为约3000g/m2/24小时。 The basic performance of breathable film laminated test results in Example 1 3-3.5 times the elongation core 106A and Comparative Sample Test Summary of Test Example A) was about 3000g / m2 / 24 hr.

皮层中有Kraton的试样有些阻碍透气性。 Cortex have some sample Kraton impede breathability. 所有带106E配方芯层的薄膜透气性要低得多。 All film permeability core with 106E recipe is much lower. 含高性能弹性体如Pebax2533,4033,Pellethane和Kraton的薄膜呈现的透气性是对比芯层薄膜的55-89%。 Including high-performance elastomers such as Pebax2533,4033, Pellethane and Kraton films presented permeability is 55-89% vs. the core of the film. 下表3反映了这些结果。 Table 3 reflects the results.

表3示意各种试样的WVTR试验结果。 WVTR test results in Table 3 indicate the various samples.

表3-WVTR试验结果 Table 3-WVTR test results

*仅5倍伸长B)层合试验实施例2的试验结果第二次层合试验中层合材料的透气性增加了。 * Only five times the elongation B) laminated test the implementation of the test results of Example 2 second test middle laminated composite materials increased breathability. 一开始,将薄膜拉伸到3.5倍并在用粘合剂层合前允许它收缩。 Initially, the film was stretched to 3.5 times and before lamination with an adhesive to allow it to shrink. 在后来的试验中,将它拉伸到5.5倍,保持在该拉伸张力下用粘合剂进行层合,然后使层合材料收缩。 In later experiments, it will be stretched to 5.5 times, and maintained at this stretched tension laminated with an adhesive, and then the laminate shrinkage. 在该方法中同时获得了MD和CD方向的伸长率。 In this method, while access to the MD and elongation in the CD direction. 在该试验中所得薄膜的最后伸长比高得多,在4.08-4.86之间。 In this test, the final stretch ratio of the resulting film is much, between 4.08-4.86. 用Pellethane共混皮层的薄膜表现出的WVTR值高于用Pebax2533的类似配方的薄膜的相应值。 Blended with Pellethane skin layer film exhibit a WVTR value is higher than the corresponding values of a similar formulation with Pebax2533 film. 在第一次试验中情况也相同。 In the first test case is also the same. 带106E芯层的Pebax4033共混皮层薄膜的WVTR从低伸长率下的1188增加到高伸长率下的2480,高出1倍多。 WVTR of Pebax4033 blends with 106E core cortex films from 1188 to high elongation low elongation under 2480, up 1 percent.

在第一和第二次试验实施例中,皮层似乎阻碍透气性。 In the first and second test embodiment, appeared to be hindered skin permeability. 但是,WVTR结果是可接受的,不过低于对比薄膜。 However, WVTR results are acceptable, but less than the comparative film. 带皮层的薄膜倾向于收缩更多并导致比对比薄膜更低的最终伸长率。 The film tends to shrink with the cortex and leads to more than a lower ultimate elongation contrast film. 这些结果示于下表4中。 These results are shown in Table 4 below.

表4-第二次试验层合材料的WVTR和伸长选定的多层皮层和对比层5.0倍-5.5倍伸长 Table 4 - Second Test WVTR and laminating material selected elongation and Comparative multilayer skin layer 5.0 times -5.5 times elongation

对所有上述试验,水头都超过150mbar。 All the above tests, the head more than 150mbar.

表5-对第二次试验层合材料的MD和CD循环试验多层皮层加对比层5.5倍伸长 Table 5 - for the second test laminate MD and CD multi-cycle test comparing cortical layer plus 5.5 times the elongation

拉伸与收缩张力结果的单位为g。 Stretching and contraction of the tension resulting in units of g. 滞后和永久变形结果为%这类薄膜在MD方向上不能适当地试验到满量程50%伸长率循环。 Hysteresis and permanent deformation results for% in the MD direction such films can not be properly tested up to 50% of full scale elongation cycle. 小结Pebax共混皮层薄膜倾向于不呈现较高的收缩率,因此WVTR较低。 Summary Pebax blend skin layer films tend not to exhibit a high shrinkage, and therefore low WVTR. 皮层中的这种弹性显然是导致WVTR较低的一个因素。 Cortex This flexibility is clearly a factor leading to a lower WVTR.

试验实施例3中的3层薄膜在高伸长比(4.75-5.0)下再次试验并在涂布粘合剂并贴面(facing)后使之收缩以保证层合材料的MD和CD伸长。 Test Example 3 The three-layer film in a high elongation ratio test again (4.75-5.0 M) and the application of the adhesive and veneer (facing) After allowing to ensure laminate shrinkage MD and CD stretch . 用了Findley 2525A粘合剂,未观察到前面试验中那样的分层问题。 Findley 2525A adhesive used, was not observed in the previous experiment as stratification. 本试验中主要用柔性聚烯烃纺粘纤维来代替缩颈的聚丙烯纺粘纤维。 In this experiment the main place of the constriction of polypropylene spunbond fibers of a flexible polyolefin spunbond fibers.

以三种不同的方式试验带106E芯的Kraton/Pebax皮层薄膜:在最后的MDO辊与胶粘层合辊之间允许FPO纺粘纤维略有收缩(在最后MDO辊与层合辊之间的比值为0.95),在层合辊之前FPO无任何收缩(比值为1.0),以及在层合辊之前FPO无任何收缩但用了45%缩颈纺粘纤维。 Kraton test in three different ways with 106E core / Pebax cortical film: between the last MDO roll and adhesive lamination roller allows FPO spunbond slight shrinkage (in the last MDO roll and the lamination roll ratio between 0.95), prior to lamination roller FPO no shrinkage (ratio of 1.0), and before lamination roller FPO but no shrinkage of 45% with a constriction spunbond fibers. 在层合前略有收缩降低了薄膜的总WVTR。 A slight contraction before lamination reduces total WVTR of the film. 对于层合到FPO材料上面的缩颈纺粘纤维上的薄膜,未观察到WVTR有明显的差别。 For laminated to the film material above the constriction FPO spunbond fibers is not observed WVTR is significantly different. 数据示于下表6中。 Data are shown in Table 6 below.

表6-第三次试验层合材料的WVTR、剥离强度与伸长选择的多层皮层加对比层4.75倍-5.5倍伸长 Table 6 - The third test laminates of WVTR, plus multi-layered cortical layer peeling strength and elongation contrast chosen elongation 4.75 times -5.5 times

所有上述测试水力头均超过150mba。 All of these tests were hydraulic head over 150mba. *NM-因无法剥离而未测量对每种样品的5个试样在层合到纺粘材料上后分别在50%和100%伸长率下进行2次循环拉伸试验(如前所述)。 * NM- measurement result can not be stripped without five specimens of each sample were laminated to the layer at 50% and 100% elongation of a tensile test conducted after 2 cycles spunbond material (as previously described ). 与对比试样相比,CD方向上50%伸长率试验,就30%时的拉伸与回复张力,给出了从可比至更好的结果。 Compared with the comparative sample, the CD direction 50% elongation test, a tensile tension of 30% and recovery when given to better results from comparable. 结果示于下表7。 The results are shown in Table 7.

表7皮层配方 30% 50% 30% 50% 滞后1/2 伸长@伸长1 伸长1 收缩2 收缩2 30%处/ 永久变形250% 100% 50% 100% 50%处 50%/100%循环 循环 循环 循环100%Ampacet Skin 637 762 154 40 75.8/94.8 14.74/42.7430%EMA TC221 597 706 146 38 75.6/94.6 14.85/43.4560%Pebax403310%防粘剂30%EMA TC221 568 671 149 46 73.8/93.1 14.29/41.3460%Pebax253310%防粘剂30%EMA TC221 505 630 139 52 72.5/91.7 14.76/40.3060%Pellethane10%防粘剂80%EMA TC221 508 643 130 32 74.5/95.0 15.4/43.6220%防粘剂80%FPO W300 638 729 150 31 76.6/95.7 15.24/44.3120%防粘剂45%EMA TC221 614 691 140 34 77.1/95.1 14.95/43.3845%Kraton G165710%防粘剂48%EMA TC221 676 711 156 26 76.9/96.3 15.07/43.5348%FPO W3004%防粘剂55%EVA LD760 569 665 138 36 75.8/94.6 15.03/43.2935%FPO W30010%防粘剂30%Kraton G1657 626 754 152 39 75.7/94.2 14.7/43.3560%Pebax403310%防粘剂30%**Kraton G1657 543 678 156 70 71.3/89.7 12.05/34.2260%Pebax403310%防粘剂45%**EMA TC221 534 658 156 79 70.8/88.0 11.76/32.7945%Kraton G165710%防粘剂45%***EMA TC221 559 652 163 78 70.7/88.0 11.52/33.0445%Kraton G165710%防粘剂60%CaCO3(106A) 603 701 146 33 75.8/95.3 14.60/43.740%Affinity/Engage55%CaCO3(106E) 635 696 182 72 71.3/89.7 11.64/34.3830%Affinity/Engage10%Kraton G1675拉伸张力(拉伸1)和收缩张力(收缩2)的单位是g。 Table 7 Formulation skin layer 30% 30% 50% 50% 1 delayed by 1/2 Elongation Elongation Elongation @ 1 Shrinkage Shrinkage 2 2 30% point / permanent deformation of 250% 100% 50% 100% 50% at the 50% / 100 % circulation loop circulation loop 100% Ampacet Skin 637 762 154 40 75.8 / 94.8 14.74 / 42.7430% EMA TC221 597 706 146 38 75.6 / 94.6 14.85 / 43.4560% Pebax403310% detackifier 30% EMA TC221 568 671 149 46 73.8 / 93.1 14.29 /41.3460%Pebax253310% detackifier 30% EMA TC221 505 630 139 52 72.5 / 91.7 14.76 / 40.3060% Pellethane10% detackifier 80% EMA TC221 508 643 130 32 74.5 / 95.0 15.4 / 43.6220% detackifier 80% FPO W300 63,872,915,031 76.6 / 95.7 15.24 / 44.3120% detackifier 45% EMA TC221 614 691 140 34 77.1 / 95.1 14.95 / 43.3845% Kraton G165710% detackifier 48% EMA TC221 676 711 156 26 76.9 / 96.3 15.07 / 43.5348% FPO W3004% detackifier 55% EVA LD760 569 665 138 36 75.8 / 94.6 15.03 / 43.2935% FPO W30010% detackifier 30% Kraton G1657 626 754 152 39 75.7 / 94.2 14.7 / 43.3560% Pebax403310% detackifier 30% * * Kraton G1657 543 678 156 70 71.3 / 89.7 12.05 / 34.2260% Pebax403310% detackifier 45% ** EMA TC221 534 658 156 79 70.8 / 88.0 11.76 / 32.7945% Kraton G165710% detackifier 45% *** EMA TC221 559 652 163 78 70.7 / 88.0 11.52 / 33.0445% Kraton G165710% detackifier 60% CaCO3 (106A) 603 701 146 33 75.8 / 95.3 14.60 / 43.740% Affinity / Engage55% CaCO3 (106E) 635 696 182 72 71.3 / 89.7 11.64 / 34.3830% Affinity / Engage10% Kraton G1675 draw tension (stretching 1) and shrink tension (contraction 2) is in g. 滞后(Hyst1/2)和永久变形的单位为%。 Hysteresis (Hyst1 / 2) and permanent deformation of the unit is%. **有106E芯层***106E芯层和该薄膜在层合工艺中被层合前已收缩到较高的百分率。 There 106E ** *** 106E core layer and the core layer in the laminated film is laminated before the process shrink to a higher percentage.

试样未进行100%伸长率的试验。 Sample test at 100% elongation is not performed. 理论上,100%伸长率已超过茂金属催化聚乙烯芯和缩颈纺粘的弹性范围,因为在这样的水平会观察到大的永久变形。 Theoretically, 100% elongation rate exceeds the elastic range of metallocene-catalyzed polyethylene core and necking spunbonded, because in such a level will be observed in a large permanent deformation.

皮层对芯层的相对作用示于表5-6。 The relative role of the cortex of the core are shown in Table 5-6. 结果表明,使用Kraton共混对比薄膜(106E)和与芯配方共挤出的薄膜,滞后和永久变形都较好。 The results show that the use Kraton blending comparative film (106E) and the core formulation coextruded film, hysteresis and permanent deformation are preferred. 这类薄膜尤其表现出比对应的拉伸张力(拉伸1)更高的收缩张力(收缩2),因此具有提高的滞后。 In particular, such films exhibit than the corresponding draw tension (stretching 1) higher shrinkage tension (contraction 2), thus having increased hysteresis. 与106A芯配方共挤出并含Pebax2533和Pellethane的皮层表现出可比拟的较高滞后值。 And 106A of the core and co-extruded formulations containing Pebax2533 and Pellethane cortex exhibit higher hysteresis values can be compared. 试验实施例结论含Pebax和Pellethane共混皮层的多层薄膜在50%伸长率的弹性性能超过了没有弹性皮层的对比薄膜。 Conclusion Test Example embodiments and Pellethane blends containing Pebax cortex multilayer film in 50% elongation of the elastic properties of the elastic skin layer no more than a comparative film. 虽然这些薄膜的WVTR的确低于对比薄膜,但是当它们被拉伸到较高的拉伸比时,所表现的WVTR值仍高于2000g/m2/24小时。 Although these films actually below WVTR comparative film, but when they are stretched to a higher draw ratio, WVTR value is still higher than the performance of 2000g / m2 / 24 hr.

在100%伸长率循环试验时,高弹性皮层不能有效地克服芯层较低的弹性。 At 100% elongation cycle test, a high elastic skin layer can not effectively overcome the low elasticity of the core layer. 在这样高的伸长率下,填充茂金属塑性体芯层显然越过了它的弹性范围且无明显的收缩。 At such high elongation, filled metallocene plastomers core clearly crossed its elastic range without significant shrinkage. 在这样高的伸长率水平下,少于薄膜总厚5体积%的皮层不能补偿芯层缺乏的弹性。 In such a high level of elongation, the total thickness of the film is less than 5% by volume of the skin layer can not compensate for the lack of elasticity of the core layer.

在填充茂金属催化的聚乙烯配方(106E)中加入10%Kraton提高了弹性,但WVTR比没有Kraton的106A配方的低。 Was added 10% Kraton improved metallocene catalyzed elastic polyethylene filled formulations (106E), but it did not Kraton WVTR than 106A of formulations low. 当两片单层对比薄膜被拉伸到较高拉伸比(5.0-5.5倍)时,在50%时的WVTR和弹性似乎收敛而变得相近了。 When the two sheets of single-layer comparative film is stretched to a higher draw ratio (5.0 to 5.5 times), at 50% of the WVTR and elasticity seems to become close to the convergence. 在那样高的伸长比,茂金属催化聚乙烯树脂可能已拉伸到其弹性范围以外。 In as high elongation ratio, metallocene-catalyzed polyethylene resin may have stretched beyond its elastic range. 在高伸长/应变水平,这类弹性材料可能发生硬化并变得更象一种非弹性塑性材料。 In the high elongation / strain level, such an elastic material may occur harden and become more like a non-elastomeric plastic material. 它们的回复能力变得极小。 Their ability to respond extremely small. 被拉伸到高伸长比的茂金属催化聚乙烯薄膜似乎就是这种情况。 Be stretched to a high elongation ratio of metallocene-catalyzed polyethylene film seems to be the case.

Pebax和Pellethane皮层薄膜具有高的弹性(最低的滞后),但是WVTR大大降低了。 Pebax and Pellethane cortex thin film having high elasticity (low hysteresis), but greatly reduced WVTR. 虽然这类薄膜的层合方式使它们表现出双轴拉伸,但它们在加工方向上受到限制。 Although such films laminated manner so that they exhibit biaxial stretching, but they are limited in the machine direction. 这些层合材料在MD方向上的最高的伸长率是26%。 These laminates highest elongation in the MD direction is 26%. 因此这些薄膜不可能在MD方向上以100%伸长率试验。 Therefore, these films can not in the MD direction at 100% elongation test. 即使在50%,也可出现非常高的张力,一些撕裂和薄膜/纺粘分层。 Even at 50%, can also occur very high tension, and a number of tear film / spunbond layered. 但是加上皮层,MD收缩就能得到改进。 But with the cortex, MD shrinkage can be improved.

根据前面提到的所有数据,含Pebax2533共混皮层与106E芯层的薄膜,如果选择最佳配方,则会表现出最好的总体弹性。 According to all the data mentioned above, including the cortex and the 106E core Pebax2533 blend of film, if you choose the best formula, will exhibit the best overall flexibility. 根据表8中Pebax2533对Pellethane2103-80各性能的试验结果,可得到此结论。 According to the test results table Pebax2533 8 Pellethane2103-80 each performance, available this conclusion.

表8聚合物 拉伸张力/收缩张力 滞后 WVTRPebax2533,10gsm 190/140 27% 2800Pellethane2103-80AE,10gsm290/150 48% 2200 Table 8 polymer stretching tension / contraction tension lag WVTRPebax2533,10gsm 190/140 27% 2800Pellethane2103-80AE, 10gsm290 / 150 48% 2200

在发展多层材料时,复合或一起共挤出的材料的不相容性是一个问题。 When the development of multi-layer material, or be co-extruded composite material incompatibility is a problem. Pebax,Pellethane和Estane都是极性材料,不同于非极性聚乙烯芯层和聚丙烯纺粘层。 Pebax, Pellethane and Estane are polar materials, unlike the non-polar polyethylene and polypropylene spunbond layer core. EMA或Kraton材料已成功地与皮层共混,起到增容剂和改进芯层与纺粘层之间粘结性的作用。 EMA or Kraton materials have been successfully blended with the cortex, play a compatibilizer effect and improved adhesion between the core and the spunbond layers. 结论是复合和共挤出是成功的,因为皮层材料的彻底共混和皮层与芯层的粘结性。 Concluded that compound and coextrusion are successful because thoroughly blend sheath material and the core layer and skin adhesion.

因此,弹性效率已提高的填充弹性薄膜被描述为共挤出整体薄皮层包裹在一个填充芯层周围。 Therefore, the efficiency has increased elasticity filled elastomeric film is described as a thin skin coextruded overall wrapped around the core in a filling. 在薄膜共挤出期间,在填充芯材料一面或两面加上非常薄的一层包含非填充弹性聚合物或与弹性聚合物的共混物,将提高收缩率并减少产品膜在最高50%伸长率的永久变形。 During the co-extrusion film, filling a core material in one or both sides plus a very thin layer comprising a non-filled elastic polymer or the elastic polymer blend, will increase and reduce the shrinkage in the product up to 50% stretch film permanent deformation of long rates. 在高于50%的伸长率下,已发现试验材料经历较低的收缩。 At greater than 50% elongation, the test material has been found to experience less shrinkage. 但是皮层必须足够薄才能允许湿气不断穿透。 But the cortex must be thin enough to allow moisture to penetrate continuously. 两面的皮层可以相似的,如ABA共挤出结构,或不同的,如ABC结构,其中B是填充芯,而A与C是皮层。 The skin layer can be similar on both sides, such as ABA coextruded structure, or different, such as ABC structure, wherein B is a bead core, while the A and C is the cortex.

虽然本发明已具体参考优选实施方案作了描述,但应理解,对它们仍可作许多改性与增删而不偏离如下面权利要求所提出的本发明的精神与范围。 Although the invention has been particularly described with reference to preferred embodiments, it is to be understood that many modifications thereof may still be added or deleted without departing from the spirit and scope of the following claims as proposed by the present invention.

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Classifications
International ClassificationA41D13/12, B29C55/00, B32B27/20, C08J9/00, B32B27/34, B32B25/14, A61F13/514, B32B27/32, A41D31/02, A61F5/44, B29C55/02, A61F13/15, B32B25/02, B32B27/40, A41D31/00, A61F13/49
Cooperative ClassificationB32B27/40, Y10T428/31928, B32B27/34, B29K2105/04, B29K2105/16, B32B25/14, A61F13/51464, Y10T428/31587, A61F13/51458, Y10T428/31725, B29C55/005, Y10T428/31576, A41D31/0016, Y10T428/31913, B32B27/20, B32B27/32, B29C55/023
European ClassificationA61F13/514B1, A61F13/514B2, B29C55/02B, B32B25/14, B32B27/32, B29C55/00B, B32B27/34, A41D31/00C2, B32B27/20, B32B27/40
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