CN1270554A - 透气阻隔复合材料 - Google Patents

透气阻隔复合材料 Download PDF

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CN1270554A
CN1270554A CN98809048A CN98809048A CN1270554A CN 1270554 A CN1270554 A CN 1270554A CN 98809048 A CN98809048 A CN 98809048A CN 98809048 A CN98809048 A CN 98809048A CN 1270554 A CN1270554 A CN 1270554A
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composite
film
hook
weaving cloth
layer
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CN1105014C (zh
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A·L·麦科马克
W·B·哈夫纳
W·W·杰克逊
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Kimberly Clark Worldwide Inc
Kimberly Clark Corp
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    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44BBUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0003Fastener constructions
    • A44B18/0011Female or loop elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56Supporting or fastening means
    • A61F13/62Mechanical fastening means, ; Fabric strip fastener elements, e.g. hook and loop
    • A61F13/622Fabric strip fastener elements, e.g. hook and loop
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B46/00Surgical drapes
    • A61B46/40Drape material, e.g. laminates; Manufacture thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/702Amorphous
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • B32B2307/7265Non-permeable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00Clothing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00Personal care
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/27Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
    • Y10T24/2708Combined with diverse fastener
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/27Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
    • Y10T24/2725Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener] with feature facilitating, enhancing, or causing attachment of filament mounting surface to support therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
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    • Y10T24/275Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener] with feature facilitating or causing attachment of filaments to mounting surface
    • Y10T24/2758Thermal or adhesive
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/27Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
    • Y10T24/2783Buckles, buttons, clasps, etc. including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener] having filaments constructed from coated, laminated, or composite material
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24008Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24008Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
    • Y10T428/24017Hook or barb
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31855Of addition polymer from unsaturated monomers
    • Y10T428/31909Next to second addition polymer from unsaturated monomers
    • Y10T428/31913Monoolefin polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/674Nonwoven fabric with a preformed polymeric film or sheet

Abstract

一种适合在机械固定件中作为与互补的钩部分彼此固定的圈固定件部分用的复合材料,其制造方法包括,将具有无定形聚合物层的薄膜(10)层合到预粘合非织造纤网(34)上,实施层合的条件造成对应于预粘合部位的层合物粘合点,以及粘合点之间的蓬松单丝或纤维。还希望复合材料具有的MVTR至少约100g/m2/24h,静水压头至少约50mbar。在当作用即弃个人护理制品,如用即弃尿布,的部件使用中,圈固定件部分可基本上是整个背衬,从而提供舒适、保护及高度可调的贴身性。

Description

透气阻隔复合材料
发明背景
发明领域
本发明涉及可用作透气阻隔层,特别是可用作钩-圈式固定件部件的复合材料,此种固定件的典型代表是由VELCRO INTERNATIONAL广泛出售且现已可由许多来源购得、用于从鞋带到高尔夫手套以及需要非永久性固定的许多其他用途的固定件。这些固定件基本上包括钩元件和圈元件,二者被压紧在一起时,彼此纠缠成为能抵抗剪切力但当受到要求数值的剥离力时又可分开的状态。这些元件的式样已演变相当复杂,通过改变诸如钩的形状、大小和柔性乃至圈的各种类似特征可获得多种多样的性能。对于许多低成本用途来说,例如像尿布和成人失禁穿戴用品之类用即弃服装领域的固定件,需要开发低成本然而制成的此类固定件仍满足性能要求的制造技术和材料。特别是在那些圈部分又同时作为背衬材料(外包覆层)的场合,希望它既透气,故而舒适,又起到阻隔层作用从而防止泄漏。本发明提供一种理想的圈状固定件部件,特别适合此类用即弃产品使用。
背景
本领域已有大量关于诸如用即弃尿布之类用即弃产品领域使用的钩-圈型固定件以及用于此种固定件的组成部分的参考文献。仅作为例子,可举出授予Jackson等人的美国专利5,614,281,该公开本身还提供了大量背景材料,为此将其全部并入本文作为参考。其他圈式固定件材料描述在,例如授予Ott等人的美国专利4,761,318、授予Noel等人的美国专利5,032,122、授予Goulait的美国专利5,326,612、授予King等人的美国专利5,595,567以及授予Allen等人的美国专利5,647,864中。扼要地说,特别经济的圈部分可采用诸如纺粘法之类的非织造布技术成形,生产出的纤网中在粘合点之间存在相当大的面积,其上的单丝彼此没有粘合,因此可供与互补的钩元件的钩子相咬合。在规定的成本范围内,可改变例如非织造布中粘合点的形状、数量及面积覆盖率以及选择特定钩元件等因素,以达到要求水平的剥离强度和其他性能。另外,非织造布和/或钩部分的聚合物或其他组成成分的选择也影响固定件在给定用途中的性能和/或成本。迄今依然存在着对这样一种圈固定件部分的需要,它可具有特定的性能,如剥离强度、剪切强度及可重复固定性乃至透气阻隔功能,而且其成本与作为用即弃产品背衬部分的应用相一致。具有布料类属性的透气阻隔材料的其他用途,如用作手术罩衣和被单,对于本领域技术人员来说则是显而易见的。
发明概述
本发明涉及特别适合用作圈固定件部分的透气阻隔非织造布复合材料,它包括由薄膜层与预粘合的非织造布层组成的层合物,其中层合物的粘合发生在预粘合非织造布的粘合部位,于是在这些粘合部位之间留出大量长丝或纤维未被粘合。为了改善作为诸如用即弃尿布之类个人护理制品背衬部分的舒适和实用性,该层合物具有透气性,其湿蒸汽透过速率高于约100g/m2/24h且静水压头(hydrohead)数值至少是50mbar水柱。在与互补的钩部分一起使用中,由该复合材料构成的圈固定件提供在制品背衬上任何部位进行固定的能力及在一定时间内的一致的可重复固定性,以及适合多种用即弃和有限使用用途的开合循环次数。该非织造布层包含一种均匀或不均匀粘合压花的粘合图形,该图形产生,任取100cm2非织造布表面,至少70%的未粘合面积。另外,其粘合频率提供约50~约200粘合点/平方英寸的花纹密度,其面积覆盖率为约5%~约30%,优选约10%~约25%。薄膜层,或者是具有柔软、无定形聚合物的外露层的多层或复合挤出结构,或者是单层,而在这两种情况下均基本是舒适并与非织造布相容的微孔阻隔层。层合可利用该无定形聚合物的性质通过加热和加压实现,该无定形聚合物可存在于多层薄膜中,或者例如在单层薄膜的实施方案中,作为单独加上去的粘合层。为了改善酷似布料的美观和作为圈部分使用的与钩元件的咬合,可制成一种回缩的层合物,这可通过在层合到非织造布上之前拉伸该薄膜,随后让层合物松弛或回缩来实现,从而生产出一种在薄膜与非织造布维持牢固固定的粘合区域之间由粘合点间未粘合长丝或纤维形成的“圈组织”表面。本发明还包括制造该圈固定件部分的方法。
发明详述
定义
本发明在下面所使用的术语具有规定的含义,除非在上下文中要求不同的含义,或者明确指明其不同的含义;而且,单数一般都涵盖复数,同样,复数一般都包括单数,除非另行指明。
“非织造布”是指由纤维或长丝通过除针织或纺织以外的方法成形的纤网,它包含某些或全部纤维或长丝之间的粘合;此种粘合可通过例如热、粘合剂或诸如缠结之类的机械手段形成。
“纤维”是指具有规定长度的狭长丝,例如通过将连续丝切断为例如2~5cm的长度形成的短纤维。纤维的集合可具有相同或不同的长度。
“长丝”是指一般而言为连续的丝,具有非常大的长径比,例如1000或更大。
“纺粘”是指这样成形的长丝非织造布:将聚合物经熔融挤出为丝束,随后被骤冷和拉伸,一般采用高速气流,以增强丝束,丝束收集在成形表面上,然后进行粘合,通常采用加热和加压的花纹粘合。纺粘法例如描述在,且详情可进一步参见下列文献:授予Appel等人的USP4,340,563、授予Matsuki等人的USP 3,802,817及授予Dorschner等人的USP 3,692,618。
“圈”是指非织造布中某种区域,其中至少有一根纤维或单丝与其他的相分离,包括但不限于相同纤维或单丝本身交叉形成的构造;即,不一定需要形成完整的圆圈或椭圆。
“互补钩”是指一种适合做成机械固定件部分的构造,具有一定轮廓、高度、密度、几何形状及取向的凸起,因此能以可松开的方式固定到本发明圈固定件材料上,从而提供预期水平的钩结剥离和剪切强度性能。这些凸起不一定要求形成“钩子”,而是,可具有其他形状,例如蘑菇状。合适的钩材料可以是例如单向或双向的,且一般包含约16~约620个钩子/平方厘米和约0.00254cm~约0.19cm的钩子高度。它们可由,例如Velcro International(Manchester,NH)及3M(圣保罗,MN)等公司购得。
“无定形聚合物”在本文中用来描述粘合(剂)层,它或者是多层薄膜的一部分,或者是单独加上去的层,指的是这样的热塑性聚合物,例如包含密度约0.85~约0.89且为低结晶度,例如小于约30%的聚烯烃,如经常作为粘合剂成分并具有有限热熔融性质的那些。
“热点粘合”涉及将待粘合纤维的布料或纤网送过加热轧光辊与砧辊之间。以某种方式使轧光辊带上花纹,以便使整个布料不是沿其整个表面都发生粘合。结果,已开发出多种轧光辊用的花纹,既为功能的目的,也为美观起见。正如本领域技术人员懂得的,粘合面积百分数必然是以近似值或某一范围来描述,因为,粘合针一般为锥形并且随后时间推移会磨损。同样如本领域技术人员懂得的,“针数/平方英寸”与“(粘合)点数/平方英寸”的说法有时彼此通用,因为,砧辊-针将在底层上产生在大小与表面关系上与针在砧辊上基本相同的粘合点。一种花纹的实例具有许多点,它是Hansen Pennings或“H&P”花纹,具有约30%的粘合面积,和约200点/平方英寸,正如授予Hansen和Pennings的美国专利3,855,046中所公开的。H&P花纹具有方块点或针的粘合区域,其中每根针可具有例如0.038英寸(0.965mm)的边长,所产生的花纹具有约30%的粘合面积。另一种典型点粘合花纹是扩展的Hansen andPennings或“EHP”粘合花纹,产生约15%~18%的粘合面积,例如可具有边长为0.037英寸(0.94mm)的方块针,针密度为约100针每平方英寸。另一种典型的点粘合花纹代号为“714”,具有方块针粘合区域,其中每根针例如可具有0.023英寸的边长,产生15%~20%的粘合面积以及约270针/平方英寸。另一种常见的花纹包括“Ramisch”菱形花纹,具有8%~14%和52针每平方英寸的粘合区的重复菱形;还有金属丝编织花纹,顾名思义,像例如纱窗似的花纹,具有15%~20%的粘合面积和302点每平方英寸。就典型而言,粘合面积百分数可在从布料层合纤网面积的约10%到约30%的宽范围内变化,且每平方英寸的针数也可在宽范围内变化。然而在这些实际上无限的粘合构型组合当中,仅有选择的几种粘合花纹符合本发明使用要求。它们的粘合面积应在约5%~约30%范围内,较好在约10%~约25%的范围,粘合频率在约50~约200每平方英寸,较好在约75~约125每平方英寸范围。本文所使用的术语“预粘合”非织造布是指那些经过粘合上符合上述参数规定的有用花纹的非织造布。正如本领域熟知的,点粘合不仅将层合物各层彼此结合在一起,而且通过每一层内单丝和/或纤维之间的粘合还赋予每一个单独层以整体性。
测试程序
静水压头:布料阻液性的一种度量是静水压头试验。静水压头试验测定规定数量液体透过之前布料能够承载的水柱高度(以mbar为单位)。静水压头读数高,表明该布料比低水头布料阻挡液体透过的能力好。静水压头试验是按照联邦试验标准191A,方法5514进行的。
抓样拉伸试验:抓样拉伸试验是布料受单向应力时断裂强度和伸长或应变的度量。该试验是本领域是熟知的,并根据联邦试验方法标准191A的方法5100的规定进行。结果以断裂前的磅数或克数及断裂前伸长百分数表示。数值越高,表明布料越结实,可拉长性越好。术语“载荷”是指,在拉伸试验中,将样品拉断或拉破所需要的最大载荷或力,以重量单位表示。术语“总能量”是指在载荷-伸长曲线下方的总能量,以重量-长度单位表示。术语“伸长”是指拉伸试验期间样品在长度上的增加。抓样拉伸试验采用2个夹子,每个具有2个爪,每个爪具有与样品接触的面。夹子将材料保持在同一平面内,一般在竖直平面内,并彼此相距3英寸(76mm),然后以规定的拉伸速度分开。抓样拉伸强度及抓样伸长的数值是采用4英寸(102mm)×6英寸(152mm)尺寸的样品获得的,其中夹爪面对的大小为1英寸(25mm)×1英寸,并采用300mm/min的恒定拉伸速度。样品比夹爪宽,因此所获得的结果代表夹持宽度内纤维的有效强度与布料中那些邻近纤维所贡献的附加强度之和。样品被夹紧在例如Sintech 2试验机上,由Sintech公司(1001 Sheldon Dr.,CaryNC 27513)供应;Instron TM型,由Instron公司(2500华盛顿街,Canton,MA 02021)供应;或者Thwing-Albert型号INTELLECT II,由Thwing-Albert仪器公司(10960 Dutton Rd.,费城,PA 19154)供应。这一试验逼真地模拟布料在实际使用中的应力状态。给出的结果为3个试样测定结果的平均值,可沿样品的横向(CD)或者纵向(MD)进行。
布条拉伸试验:布条拉伸试验类似于抓样拉伸,它测定布料的峰值载荷及断裂载荷以及峰值和断裂伸长百分数。该试验测定以克计的载荷(强度)和以百分数计的伸长率。在布条拉伸试验中,采用2个夹子,每个具有2个爪,每个爪具有与样品接触的面,夹子将材料保持在同一平面内,一般在竖直平面内,并彼此相距3英寸(76mm),然后以规定的拉伸速度分开。布条拉伸强度及布条伸长率的数值是采用3英寸×6英寸尺寸的样品获得的,其中夹爪面对的大小为1英寸(25mm)高×3英寸宽,并采用300mm/min的恒定拉伸速度。该试验可采用:Sintech 2试验机,由Sintech公司(1001 Sheldon Dr.,Cary NC 27513)供应;Instron TM型,由Instron公司(2500华盛顿街,Canton,MA 02021)供应;或者Thwing-Albert型号INTELLECT II,由Thwing-Albert仪器公司(10960 Dutton Rd.,费城,PA 19154)供应。给出的结果为3个试样测定结果的平均值,可沿样品的横向(CD)或者纵向(MD)进行。
剥离试验:在剥离或脱层试验中,测定需要多大的拉力才能该层合物的各层彼此拉离。剥离强度的数值是采用规定宽度的布料、夹爪宽度及恒定拉伸速度获得的。以具有薄膜侧的样品为例,在样品的薄膜侧上覆盖蒙版粘带或某种其他合适的材料,以防止在试验期间薄膜被剥离。鉴于蒙版粘带仅存在于层合物的一侧,因此不会对样品的剥离强度作出贡献。该试验采用2个夹子,每个有2个爪,每个爪有1个面接触样品,以便将材料保持在同一平面内,一般在竖直平面内,2个夹子在开始时相距2英寸。样品尺寸为4英寸宽×为拉离足够的样品长度所需要的长度。夹爪面朝的大小为1英寸高×至少4英寸宽,恒定拉伸速度为300mm/min。先用手将样品剥开足够的长度以便将其夹牢在正确的位置,然后夹子以规定的拉伸速度分开,从而将层合物拉离。样品沿180°受拉,并顺着2层之间被拉开,剥离强度是3次试验的平均峰值载荷,以克为单位。当层合物被拉开16mm长时开始测定力,然后继续拉,直至总共脱开170mm。该试验可采用例如Sintech 2试验机,由Sintech公司(1001Sheldon Dr.,Cary NC 27513)供应;Instron TM型,由Instron公司(2500华盛顿街,Canton,MA 02021)供应;或者Thwing-Albert型号INTELLECT II,由Thwing-Albert仪器公司(10960 Dutton Rd.,费城,PA 19154)供应。试验可沿样品的横向(CD)或者纵向(MD)进行。
Martindale磨耗试验:该试验测定布料的相对耐磨性。试验结果按1~5等表示,其中在经过在1.3磅每平方英寸的重量下120次的磨耗之后,等级5耐磨最差,1最好。试验是在Martindale磨耗试验机上进行的,例如型号103或型号403,由James H.Heal&Company公司(西约克郡,英国)供应。使用的磨料是36英寸×4英寸×0.05厚玻璃纤维增强硅橡胶轮,其橡胶表面硬度为,81A Durometer,肖氏A81±9。该磨料可由Flight Insulation公司购得,这是一家康涅迪格硬橡胶批发商(925工业园区,NE,Marietta,GA30065)。
基重:本文所描述的各种材料的基重是根据联邦试验方法191A/5041测定的。试验材料的样品尺寸为15.24×15.24cm,由每种材料得到3个数值,然后取平均。下面给出的数值系平均值。
钩结剥离(Hook peel):该180°钩结剥离强度试验旨在测定钩与圈部分的咬合有多牢固,它涉及将钩-圈固定系统的钩材料搭到圈材料上,然后沿180°角度将钩材料从圈材料上剥离。给出的最大载荷,以克为单位,是使这2种材料脱开或剥离所需要的3次最大峰值载荷数值的平均值。为实施该试验,需要具有5000g全量程载荷的连续拉伸速度拉伸试验机,例如Sintech System 2电脑一体化试验系统,可由Sintech公司购得,其办公室设在Research Triangle Park,N.C.。采用3英寸(7.6cm)×6英寸(15.2cm)的圈材料样品。2.5英寸(6.3cm)宽的钩材料样品,其已被利用粘合剂并以超声波固定到了基本非弹性非织造布材料上,以钩侧朝下从上方放下并在其上表面施压,以便与圈材料样品搭接约1英寸。为保证钩材料与圈材料之间充分和均匀的咬合,用压榨机(wringer),型号LW1,零件号14-9969,由Atlas Electric Devices公司(芝加哥,IL)供应,对合起来的钩-圈材料做1个周期的压合,其中1个周期等于在40磅重量条件下穿过压榨机1次。将承托钩材料的指状襻(fingertab)材料的一端夹牢在拉伸试验机的上夹爪中,同时将面朝该上夹爪的圈材料的一端向下弯折并固定在拉伸试验机的下夹爪中。各个材料在拉伸试验机夹爪中的定位应调节到,使存在于各个材料的松弛达到最小,且拉伸试验机启动之前夹持长度为3英寸(7.6cm)。钩材料的钩元件沿着大致垂直于拉伸试验机夹爪的预期运动方向取向。以500mm/min的恒定分离速度启动拉伸试验机,然后记录使钩材料从圈材料上沿180°角度脱开或剥离的峰值载荷,以克表示,取3次最高峰值的平均值。
钩结剪切:该动态剪切强度试验涉及,使钩-圈固定系统的钩材料咬合到圈材料上,然后沿着圈材料表面的整个幅宽来拉钩材料。测定将钩材料从圈材料中拉脱所需要的最大载荷,并以克为单位记录。为进行该试验,需要具有5000g全量程载荷的恒定拉伸速度拉伸试验机,例如Sintech System 2电脑一体化试验系统。3英寸×6英寸的圈材料样品,借助蒙版粘带被固定在全平的支持平面上,然后沿较短方向切成2半。2.5英寸×0.75英寸的钩材料样品,预先已利用粘合剂并以超声波固定到了基本非弹性非织造布材料上,沿上述较短方向对中地、自切口边缘进去2英寸定位,并压合在圈材料样品的上表面上。为保证钩材料与圈材料之间充分和均匀的咬合,用压榨机,型号LW1,零件号14-9969,由Atlas Electric Devices公司(芝加哥,IL)供应,对合起来的钩-圈材料做1个周期的压合,其中1个周期等于在总共40磅重量条件下沿MD(较长方向)穿过压榨机1次。将承托钩材料的非织造布材料的一端夹牢在拉伸试验机的上夹爪中,同时将面朝下夹爪的圈材料的一端夹牢在拉伸试验机的下夹爪中。各个材料在拉伸试验机夹爪中的定位应调节到,使拉伸试验机启动之前存在于各个材料的松弛达到最小。钩材料的钩元件沿着大致垂直于拉伸试验机夹爪的预期运动方向取向。以夹持长度3英寸、直角压出速度250mm/min启动拉伸试验机,然后记录使钩材料从圈材料上脱离所需要的峰值载荷并取3个试样的最高峰值的平均值,以克为单位。
附图简述
图1是制造本发明圈固定件材料的方法的示意图。
图2是本发明圈固定件材料的一种实施例的断面图。
图3是本发明圈固定件材料在用作个人护理制品的背衬材料时的示意图。
图4是一种可用于本发明的粘合花纹示意图。
图5是第2种可用于本发明的粘合花纹示意图。
图6是一幅放大约20倍的照片,显示本发明的复合材料在经过钩结剥离试验后并沿边缘翻折以暴露出松脱单丝的情况。
图7是本发明另一种复合材料的类似于图6的照片。
实施方案详述
本发明将参考附图及展示某些实施方案的例子来描述。本领域技术人员十分清楚,这些实施方案不代表本发明的全部范围,本发明如后附权利要求所涵盖,可应用于各种变化和等价的形式。权利要求的范围应延伸到包括所有此类变换及等价方案。
看图1,所说明的方法从填充薄膜10开始,它从卷材12上退绕并进行预热,例如通过与加热旋转鼓14,16接触。薄膜10被加热到的温度将取决于薄膜的组成及复合材料透气性及其他要求的最终性能。例如,就圈固定件而言,回缩量将影响圈的大小。在大多数情况下,薄膜将被加热到不高于其熔点以下10℃的温度。加热薄膜的目的是使其允许迅速拉伸而不造成薄膜缺陷。加热的薄膜在纵向取向机段18中沿纵向进行取向,该段包括旋转辊筒20、22以及与之相关的加压辊。辊筒22比辊筒20转得快,结果使薄膜沿移动方向(“纵向”或“MD”)受到拉伸。拉伸量将取决于该圈固定件所要求的最终性能,然而一般地,薄膜将被拉伸到其原长的至少约300%,但小于可能造成薄膜缺陷的程度。例如,就大多数采用聚烯烃为主的薄膜的用途而言,拉伸将至少是原薄膜长度的至少200%,通常在约250%~500%。拉伸的薄膜24由支持辊筒26,28承载着通过任选的粘合站27,在此,如果希望的话,涂布器30施涂无定形聚合物,例如聚烯烃树脂32。正如在下面将要详细解释的,无定形聚合物的施涂,在某些它仅作为一种薄膜成分层的本发明实施方案中是不需要的,因此,在这些情况下,该站便可以省略,并让层合物在辊隙35处进行热粘合。预粘合非织造布的面层34从卷材36上退绕并在加压辊38前面与拉伸的薄膜24合并。经过辊隙35后,让这2个层松弛,此间可加热或不加热,然后层合物以降低的速度,例如以穿过辊隙速度的80%~90%,绕着旋转辊筒40通过,辊筒40的驱动速度使得薄膜24得以回缩,从而造成面层34的起皱。越过辊筒40之后,合并层通过与加热辊筒42相接触实现退火,42的传动速度与辊筒40相近,以避免显著的附加拉伸。退火温度应视圈固定件材料所要求的最终性能及各层的组成而变化,但可介于例如拉伸期间所使用的温度上下15℃的范围内。退火之后,合并层可通过与来自空气刀43的空气或与骤冷辊相接触而得到冷却,或者希望的话,直接收集成为卷材44或被导向转化生产线以便结合到个人护理制品中。虽然没有画出,但希望的话可采用压花步骤,以便赋予层合物赏心悦目的花纹,例如通过令其以本领域技术人员已知的方式穿过压花辊之间来实现。
本领域技术人员十分清楚,上述方法适用于采用多种多样的薄膜和面层生产出性能迥异的透气、阻隔、圈固定件材料。然而,为了使本发明的圈固定件材料有效地工作,这些成分的选择最好考虑多种因素。例如,低基重的薄膜必须足够结实以便经受住为提供要求的韧性及柔软所需要的各种加工步骤,同时又维持低成本。另外,该薄膜还必须能够有效地粘合到面层上并保持阻隔性及湿蒸汽透过速率。就许多用途而言,希望拉伸后的薄膜还为复合材料提供不透明性。
符合这些要求的薄膜包括诸如聚乙烯、聚丙烯之类的聚合物,包括聚烯烃的共混物以及诸如乙烯与丙烯的共聚物之类共聚物,其基重,例如一般在约10~约50gsm的范围,而作为圈部分使用有利的是,在约15gsm~约30gsm范围。具体的例子包括线形低密度聚乙烯,如Dowlex2535、3347及3310、Affinity5200,可由道化学公司(Midland,密执安)购得。薄膜组合物较好包含高达约40wt%诸如碳酸钙之类的填料,特别是约45~约65wt%此种填料。实例包括Supercoat碳酸钙,由English China Clay公司(Sylacauga,Alabama)供应,该填料包含约1.5wt%硬脂酸或二十二烷酸的涂层以提高填料的分散性。特别有利的薄膜例子包括在1或2面上具有无定形聚合物的薄外层的复合挤出薄膜,该外层聚合物例如是富含丙烯的聚α-烯烃三元共聚物或者能够在不需要施加单独粘合层的情况下粘合到面层上的共聚物。例子是Catalloy聚合物,由Montell(美国)公司(Wilmington,Delaware)供应,它是一种烯烃多步骤反应器产物,其中无定形乙烯-丙烯无规共聚物以分子形式分散在基本半结晶的高丙烯单体/低乙烯单体连续基质中,此种体系的例子描述在授予Ogale的美国专利5,300,365中。另外,无定形聚合物层还可包含热熔粘合剂或其他无定形聚α-烯烃树脂,希望其熔体粘度为100,000mPa.s或更高,其用量例如最高约聚合物部分的约50wt%,只要上述透气阻隔性得以维持即可。市售的无定形聚α-烯烃,例如热熔粘合剂中所使用的那种,也适合用于本发明,包括但不限于,REXTAC乙烯-丙烯APAO E-4及E-5,以及丁烯-丙烯BM-4及BH-5,还有REXTAC2301,均由Rexene公司(Odessa,TX)供应,以及VESTOPLAST792,由Huls AG(Marl,德国)供应。这些无定形聚烯烃通常是在齐格勒-纳塔型载体催化剂及烷基铝助催化剂作用下合成的,且诸如丙烯的该烯烃还可与不同用量的乙烯、1-丁烯、1-己烯或其他材料进行共聚,以生成基本为无规立构的烃链。还可使用某些弹性体聚丙烯,例如描述在授予Yang等人的美国专利5,539,096及授予Resconi等人的美国专利5,596,092中,全部内容均并入本文作为参考;还有聚乙烯如AFFINITY、EG 8200,由道化学公司(Midland,密执安)供应;以及EXACT4049、4011及4041,由埃克森(休斯敦,TX)供应;以及包含1种或多种增粘剂的共混物及KRATON,由壳牌化学公司(休斯敦,得克萨斯)供应。仅在一面上具有粘合层的复合材料可具有湿蒸汽透过速率较高的优点,如果希望的话。此种薄膜更详细地描述在共同转让的同一日期以McCormack和Haffner的名义共同提交的美国专利申请系列号08/929,562(法律文件号13257)中,题为“透气性填充薄膜层合物”(快递邮件号RB 879 662 575 US),其全部内容并入本文作为参考。其他薄膜层,本领域技术人员透过本文所提供的实施例的精神不难想见。
预粘合面层应选择与薄膜或粘合层相容的那些而且应具有充分满足预期用途要求的性能,如基重、蓬松和强度。主要基于经济的考虑,优选非织造纤网,特别是基重通常在例如约10gsm~约50gsm,最常见在约15gsm~约25gsm的纺粘非织造布。面层的组成应选择得与薄膜层相容,同时又提供圈固定件部分所要求的性能。通常有用的是例如聚烯烃之类的合成聚合物,如聚丙烯、聚乙烯、包括丙烯与乙烯的共混物及共聚物。此种非织造布在上面以及本文所援引的参考文献中已做了描述,其制造方法乃是本领域技术人员已知的。具体的例子包括ACCORD纺粘非织造布,由Kimberly-Clark公司(Dallas,得克萨斯)供应。面层的粘合花纹,上面已提到,应在粘合点之间提供毛圈,以便为互补的钩子提供固定区域。有用的例子包括扩展的RHT花纹,正如授予Vogt的美国Design Patent 239,566中所述;EHP花纹;Delta Dot花纹,它包含约102针/平方英寸由偏心圆形粘合点组成的排,可提供9%~20%的粘合面积;以及前面提到的Ramish花纹。一种纺粘面层纤网使用的有利粘合花纹是“S”织纹,正如共同转让的同一日期以McCormack、Fuqua和Smith的名义提交的美国专利申请系列号08/929,808(法律文件号13,324)中所述,题为“生产强度和耐磨改善的布料的非织造布粘合花纹”(快递邮件号EM 331 625 424 US)中所描述的,其全部内容并入本文作为参考。在所有情况下,粘合面积百分数将小于约30%,粘合密度约50~约200/平方英寸。另外,作为圈固定件部分来使用,面层较好具有,按上述测定方法,至少约3000g纵向拉伸强度,以及至少约1500g横向强度,且有利的是,其按上述方法测定的Martindale耐磨性,至少约3。
当使用时,单独加上去的无定形聚合物粘合层应与面层和薄膜层二者相容,并在不妨碍湿蒸汽透过的条件下在二者之间提供粘合。有利的是,粘合层采用熔体喷射施涂,例如喷涂无定形聚烯烃,如REXTAC2730或2330,由Huntsman公司(盐湖城,犹他)供应。当以低基重施涂,例如小于10gsm,优选小于5gsm时,熔喷层是透气的而且成本效益好的。其他的例子包括Huls Vestoplast703、704和508,由Huls公司(Marl,德国)提供;以及National Starch NS 5610,由National Starch化学公司(Bridgewater,新泽西);以及上面所描述的弹性体组合物。
无论施加或不施加单独的粘合层,按前面所述层合物剥离试验测定的面层与薄膜层之间的粘合强度,希望超过按上面所述钩结剥离试验测定的钩面层(hook facing)与互补钩之间的剥离强度,以便防止不希望的脱层。有利的是,二者之间的差值至少约100g。另外,就许多用途而言,特别是诸如尿布之类个人护理制品的背衬,按上面所描述的静水压头试验测定的复合材料的静水压头,应至少约50mbar水柱,有利的是至少约90mbar。尤其是当用作用即弃个人护理制品的背衬时,复合材料的湿蒸汽透过速率应至少约100g/m2/24h,有利的是至少约800g/m2/24h。对于这些用途,按上面所描述的钩剪切试验测定的钩结剥离强度希望超过100g,而钩结剪切强度希望超过1500g。
看图2,其中表示出本发明圈固定件部分实施例的横断面。在纺粘面层114中各个粘合区域112之间形成了圈110,而面层粘合在包含外部粘合层118及基础层120的复合挤出薄膜116上,粘合发生在与粘合-层合区域112重合的每一个预粘合点上。如图所示,圈区域110由未粘合单丝或纤维组成,可用于与互补钩元件124的钩元件122彼此纠缠。如图所示,为清楚起见,钩与圈层被部分地分开了。
看图3,其中表示出用即弃个人护理尿布制品用背衬材料形式的本发明圈固定件部分的实例。尿布210包括衬里212、吸收剂214及背衬216。众所周知,衬里212允许尿液透过并由吸收剂214吸收,而背衬216(为清楚起见,以局部剖视表示出层118和120(图2))对尿液为不透的,从而有助于避免泄漏。在这种情况下,整个背衬均由本发明圈固定件材料构成,正如说到图2时所述,在其外面分布着非织造布圈。这就提供了一种与钩固定件元件结合时基本上无限度的调节。在使用中,可将钩元件218拉紧以便恰好合身,然后固定在背衬216的任何部位。而且,倘若希望调节贴身松紧,可简单地将钩元件218剥开,并在背衬216的任何地方重新定位。在有利的实施方案中,背衬为湿蒸汽可透的,以便提高舒适和干爽程度。
图4和5给出可用于本发明复合材料预粘合非织造布部分的代表性预粘合花纹。图4表示出一种前面所描述的“S-织纹”,具有预粘合区域400;图5表示出前面所描述的“扩展Hansen-Pennings”,具有粘合区域500。
图6和7是本发明的复合材料的边缘视图照片,其中分别表示出在经过钩结剥离试验之后的“S-织纹”预粘合花纹(图7)及EHP预粘合花纹(图6)。如图所示,该EHP对比材料,如上面所讨论的,虽然从钩结剥离角度看具有良好的表现,但是与本发明的“S-织纹”复合材料相比,非织造布单丝拉出的现象较为严重。2幅照片都是以约20倍的放大倍数摄取的,且摄影时样品被沿直线边缘翻折过来以暴露出松脱的单丝。
实施例
在下面的实施例中,一律采用如图1所示的程序来成形圈固定件部分,除非另行指明。
实例1
在本实例中,面料是由丙烯与3.5%乙烯的共聚物(联合碳化物6D43,由联合碳化物公司(Danbury,康涅迪格)供应)的2.0旦单丝纺粘布,基重为约0.7osy(约24gsm),经过了以扩展Hansen Pennings花纹的粘合(粘合密度100针/平方英寸,实际测定的粘合面积16.8%)。所使用的薄膜为由45wt%LLDPE(DowlexNG 3347A,密度0.917g/cc,190℃的熔融指数2.3g/10min,由道化学(Midland,MI)供应)、50%SupercoatTM,即,一种研磨硬脂酸涂布碳酸钙(由English ChinaClay供应)以及5%LDPE(Dow 6401 0.922g/cc,190℃的熔融指数2.0g/10min,由道化学供应)吹塑成形的单层薄膜,初始厚度1.5密耳。有关该薄膜的细节描述在同一受让人、以Haffner等人的名义于1996-12-27提交的美国系列号773,826中,其全部内容并入本文作为参考。无定形聚烯烃(Rextac 2715,由Huntsman公司(盐湖城,犹他)供应)熔喷粘合层,以约3.5gsm基重在177℃的熔融温度、间隔距离约10cm的条件下,被施涂到纺粘表面上。层合之前,该薄膜在纵向取向机上在71℃的温度经过4倍的拉伸从而转化为微孔的。该薄膜当在光滑橡胶(肖氏A40)辊筒与光滑钢辊筒之间的辊隙中在15PLI下层合时,维持在张紧状态。层合之后,让复合材料松弛,这是通过令其在116℃的温度退火,同时令其回缩10%(退火辊速度:100fpm;卷取辊:90fpm),然后令其在15℃的空气流中冷却实现的。所获得的层合物的基重为49gsm;其自由静水压头,220mbar;水蒸气透过速率(WVTR),1326g/m2/24h。当采用Velcro 858钩固定件部分(Velcro International(曼彻斯特,NH))供应)与互补钩元件一起试验时,获得下列按10次试验结果的平均值:钩结剥离强度,402g;钩结剪切强度,2919g。
实例2
在本实例中,面料是由丙烯与3.5%乙烯的共聚物(联合碳化物6D43,由联合碳化物公司供应)制成的2.0旦单丝纺粘布,基重为约0.65osy(约20gsm),经过了以“S织纹”花纹的粘合(粘合密度111针/平方英寸,实际测定的粘合面积17.7%),正如共同未决、同一受让人、以McCormack等人的名义于1997-09-15提交的美国专利申请系列号08/929,808(法律文件号13324)中所述,题为“生产强度和耐磨改善的布料的非织造布粘合花纹”,其全部内容并入本文作为参考。所使用的薄膜为由47wt%LLDPE(DowlexNG 3310,密度0.918g/cc,190℃的熔融指数3.5g/10min,由道化学供应)、48%SupercoatTM,即,一种研磨硬脂酸涂布碳酸钙(由English China Clay供应)以及5%LDPE(Dow 4012,密度0.916g/cc,190℃的熔融指数12.0g/10min,(由道化学供应)(案例号:12,441,于96-12提交)流延成形的单层薄膜,初始厚度1.5密耳。无定形聚烯烃(Rextac 2730,由Huntsman公司(盐湖城,犹他)供应)熔喷粘合层,以约3.0gsm的基重在177℃的熔融温度、间隔距离约11.5cm条件下,被施涂到纺粘表面上。层合之前,该薄膜在纵向取向机上在71℃的温度经过4倍的拉伸从而转化为微孔的。该薄膜当在光滑橡胶(肖氏A40)辊筒与光滑钢辊筒之间的辊隙中在15PLI下层合时,维持在张紧状态。层合之后,让复合材料松弛,这是通过令其在110℃的温度退火,同时令其回缩10%(退火辊速度:300fpm;卷取辊:270(ft/min)),然后令其在15℃的空气流中冷却实现的。所获得的层合物的基重为51gsm;自由静水压头,170mbar;水蒸气透过速率(WVTR),2429g/m2/24h。当采用Velcro 51-1003钩固定件部分与互补钩元件一起试验时,获得下列按10次试验的平均值:钩结剥离强度,174g;钩结剪切强度,2960g。
实例3
在本实例中,所使用的薄膜为流延复合挤出的“AB”薄膜,它具有:由45wt%LLDPE(DowlexNG 3310,密度0.918g/cc,190℃的熔融指数3.5g/10min,由道化学供应)、50%SupercoatTM,即,一种研磨硬脂酸涂布碳酸钙(由English China Clay供应)以及5%LDPE(Dow 4012,密度0.916g/cc,190℃的熔融指数12.0g/10min,由道化学供应)构成的基础层;以及在一面上的粘合层,该粘合层为60%SupercoatTM碳酸钙、20%无定形富含丙烯的聚α-烯烃(“APAO”),(Huls Vestoplast,密度0.865g/cc,190℃的熔体粘度125,000mPa,按DIN 53 019测定,由Huls(美国)公司(Somerset,NJ)供应)及20%弹性体聚烯烃(DowAffinityEG8200几何受阻催化的、密度0.87g/cc,190℃的熔融指数5.0g/10min,由道化学公司供应)。所述基础层占90wt%,粘合层占10wt%。该薄膜的拉伸包括:50℃预热步骤、60℃纵向单区3.8倍拉伸以及93℃退火。复合挤出薄膜的总基重为58gsm(约1.5密耳)。该复合挤出薄膜以204ft/min(62m/min)--不需要像实例2那样在面层上的单独熔喷粘合层--采用15PLI、肖氏A40橡胶/光滑钢辊辊隙,在93℃成功地实现了粘合。让复合材料松弛10%(辊隙速度:204ft/min;卷取辊速度:180ft/min)。获得的层合物具有,基重44gsm,静水压头60mbar,M/TR 423g/m2/24h。当采用实例2的Velcro 51-1003互补钩元件试验时,获得下列按10次试验结果的平均值:钩结剥离强度,238g;钩结剪切强度,3141g。
作为对比,采用上面实例中所使用的相同钩部分,对传统非织造布/薄膜层合物尿布背衬样品进行了试验。获得的结果如下:Kimberly-Clark公司的HuggiesUltratrimTM 1996市售品非织造布-薄膜层合物外包覆层(聚丙烯2.5旦纺粘并以纱窗花纹粘合:302针/平方英寸,18%粘合面积),当以Velcro钩858试验时,获得下列10次测试的平均值:钩结剥离强度,29g;钩结剪切强度,171g。而采用Velcro 51-1003钩时,10次测试的平均钩结剥离强度为71g,钩结剪切强度为589g。消费者使用试验表明,作为好动、学步儿童的主要固定件,要求钩结剥离至少约100g;钩结剪切至少约1500g。
本领域技术人员将体会到,本发明尚可在以上描述的范围内作出许多变化和修改及等价物。本发明人的意图在于,所有此种变化、修改及等价物均应包括在所附权利要求中。就此而论,等价物包括功能以及结构和组成的等价物。例如,钉子与螺钉是功能固定件等价物,尽管它们可能具有不同的结构。

Claims (24)

1.一种透气、阻液复合材料,它包含:
具有间隔分布粘合点花纹的预粘合非织造布,其中在所述粘合点之间存在未粘合纤维或单丝,
在对应于所述间隔分布粘合点花纹的位置粘合到所述非织造布上并且此外基本不粘合到所述非织造布上的薄膜,
其中所述复合材料的湿蒸汽透过速率至少约100g/m2/24h,静水压头数值至少约50mbar水柱。
2.权利要求1的复合材料,其中所述间隔分布的粘合点占所述预粘合非织造布表面面积的约5%~约30%,且粘合频率在约50~约200每平方英寸的范围。
3.权利要求2的复合材料,其中所述薄膜与非织造布之间的粘合点包含无定形聚合物。
4.权利要求3的复合材料,其中所述薄膜包含多层,且所述无定形聚合物包含与所述非织造布相接触的所述层之一。
5.权利要求3的复合材料,其中所述无定形聚合物包括,在所述薄膜接触所述非织造布之前单独施加到所述薄膜上去的层。
6.权利要求2的复合材料,其中所述间隔分布粘合点之间的所述纤维或单丝是圈状的,从而构成与互补的钩固定件部分互相咬合的区域。
7.权利要求6的复合材料作为钩-圈固定系统的圈部分的应用,其中所述钩结剥离强度在约100g~约800g的范围。
8.权利要求7的复合材料,其中所述钩结剪切强度在约1000g~约6000g的范围。
9.包含权利要求1的复合材料的个人护理制品。
10.包含权利要求8的复合材料的个人护理制品。
11.权利要求10的个人护理制品,其中所述复合材料包含一种背衬材料,它提供在所述背衬的基本上任何部位固定的可能。
12.权利要求11的个人护理制品,它选自尿布、训练裤、失禁穿戴用品及妇女护理制品。
13.一种制造透气、阻液复合材料的方法,包括下列步骤:
a)提供预粘合非织造布,它具有由间隔分布粘合点组成的花纹,其中所述粘合点之间是未粘合纤维或单丝,
b)提供透气性薄膜,
c)在所述非织造布与所述薄膜之间提供无定形聚合物层,以及
d)将所述非织造布、无定形聚合物层及薄膜结合在一起,实施结合的条件满足,使所述非织造布与所述薄膜基本上仅在所述间隔分布粘合部位彼此粘合。
14.权利要求13的方法,其中所述薄膜在粘合到所述非织造布上之后进行拉伸和回缩,从而使所述间隔分布粘合区域之间的纤维或单丝形成圈,于是提供用于互补钩部分附着的区域。
15.一种包括钩与圈部分的机械固定件,其中圈部分包含权利要求1的复合材料。
16.一种包括钩与圈部分的机械固定件,其中圈部分包含权利要求3的复合材料。
17.权利要求8的复合材料,其中间隔分布的粘合点占所述预粘合非织造布表面面积的约10%~约25%。
18.权利要求17的复合材料,其中所述粘合频率在约75~约125每平方英寸。
19.权利要求18的复合材料,其Martindale耐磨度至少约3。
20.权利要求19的复合材料,其湿蒸汽透过速率至少约800g/m2/24h。
21.一种包含薄膜层及非织造布层的层合物,其中所述非织造布层包含由粘合区域组成的花纹,且所述薄膜在所述粘合区域与所述非织造布具有较高的固定牢度,这样就提供了至少约50mbar水柱的层合物静水压头和至少约100g/m2/24h的湿蒸汽透过速率。
22.权利要求1的层合物,其中所述薄膜包含无定形聚合物并且是与所述预粘合非织造布面对面接触的粘合层。
23.包含权利要求22的层合物的手术罩衣。
24.包含权利要求22的层合物的手术被单。
CN98809048A 1997-09-15 1998-09-15 透气阻液复合材料及其制造方法以及包含该复合材料的个人护理用品和机械固定件 Expired - Fee Related CN1105014C (zh)

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CN110035727B (zh) * 2016-12-30 2021-09-21 金伯利-克拉克环球有限公司 具有改进的腿部和翼片弹性件的吸收制品
CN110035727A (zh) * 2016-12-30 2019-07-19 金伯利-克拉克环球有限公司 具有改进的腿部和翼片弹性件的吸收制品
US11884043B2 (en) 2017-04-20 2024-01-30 Foshan King Wonder Hi-Tech Co., Ltd. Laminate of film with vapor-permeable barrier function

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EP1023171B1 (en) 2009-11-25
ID24584A (id) 2000-07-27
CN1105014C (zh) 2003-04-09
CA2301956A1 (en) 1999-03-25
US5997981A (en) 1999-12-07
EP1023171A1 (en) 2000-08-02
PL339298A1 (en) 2000-12-04
DE69841325D1 (de) 2010-01-07
KR100565407B1 (ko) 2006-03-30
ZA987312B (en) 1999-02-16
AU9390498A (en) 1999-04-05
WO1999014046A1 (en) 1999-03-25
AR014374A1 (es) 2001-02-28
TR200000708T2 (tr) 2002-08-21
AU739299B2 (en) 2001-10-11
BR9815373A (pt) 2000-10-24
KR20010023956A (ko) 2001-03-26
TW492920B (en) 2002-07-01

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