CN1125629C - 具有整体的底片搭接区的一次性尿布 - Google Patents

具有整体的底片搭接区的一次性尿布 Download PDF

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CN1125629C
CN1125629C CN97181261A CN97181261A CN1125629C CN 1125629 C CN1125629 C CN 1125629C CN 97181261 A CN97181261 A CN 97181261A CN 97181261 A CN97181261 A CN 97181261A CN 1125629 C CN1125629 C CN 1125629C
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absorbent article
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overlap
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CN1244108A (zh
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马克·J·克兰
戴维·J·K·古莱特
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Procter and Gamble Co
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Abstract

本发明涉及具有整体搭接区(40)的一次性吸湿用品(20)。该吸湿用品包括可透液体的顶片(22),与顶片(22)相连的不透液体的底片(24)以及位于顶片和底片之间的吸湿芯(26)。底片(24)包括由内网片(90)和外网片(30)组成的叠层,其中内网片(90)的至少一部分与吸湿芯(26)的衣物面(60)并置。外网片(30)包括整体搭接区(40),该搭接区具有经机械预变形而产生隆起部分(44)的部分,其中隆起部分能够缠卷到互补子固定部件(70)的接合部件上。内网片(90)和外网片(30)最好在除提供整体搭接区(40)的隆起件分(44)处之外的其它地方彼此连续叠加在一起。

Description

具有整体的底片搭接区的一次性尿布
技术领域
本发明涉及一次性吸湿用品的底片。更具体地说,本发明涉及包括整体搭接区的底片。
背景技术
目前,在衣物、一次性吸湿用品等物品中广泛采用钩与环类型的可反复固定型固定装置。这种装置用于希望在两个或多个物品,或在同一物品的几个表面之间产生可反复固定连接的场合。在某些应用中,这些可反复固定型固定装置可替代通常的扣环、拉链、纽扣、按扣、带式固定件或缝合等。
目前,普遍采用机械缠卷来形成的可反复固定的连接作为机械固定件,其一种流行样式为市售的VELCRO牌。VELCRO牌固定装置在下述文献中有详细描述:美国专利2,717,437、美国专利3,009,235、美国专利3,266,113、美国专利3,550,837、美国专利4,169,303和美国专利4,984,339。
VELCRO型固定装置一般采用两个部件:子部件和母部件。子部件和母部件一般分别指钩和环部件。子部件一般包含多个有回弹性的、直立的钩形部件。母部件一般由包含多个直立环的织物构成。当子部件和母部件以面对面的关系压向一起闭合固定装置时,钩缠卷到环上,在钩和环部件之间形成多处机械连接。
已经发现,钩环型机械固定装置特别适合用于一次性吸湿用品如尿布、成人失禁衣物、妇女卫生内衣、训练裤等物品中。但是,现有钩环型固定装置在一次性吸湿用品等物品中的使用受到限制,因为这种固定装置相对于其它类型的固定件来说较贵。尽管已做了一些努力来降低钩环型固定装置的成本,以便适合用于一次性吸湿用品中,但这些尝试一般均存在一个缺点,即钩和环必须与一次性吸湿用品分开制作,并在制作过程中将其连接到吸湿用品上。因此,为了降低成本并加快制作速度,有必要提供一种与一次性吸湿用品的一个部件为整体搭接区。
发明内容
这样,本发明的一个目的是提供一种用于一次性吸湿用品的改进型固定装置。
本发明的另一个目的是提供一种用于一次性吸湿用品的底片,其中该吸湿用品包含整体搭接区。
本发明还有一个目的是提供一种制作用于一次性吸湿用品的底片的方法,其中该吸湿用品包含用于钩环型固定装置中的整体搭接区。
参照下面结合附图的说明将更清楚地了解本发明的上述及其它方面。
本发明涉及一种一次性吸湿用品,具有前腰区、后腰区和位于前腰区和后腰区之间的裆区,该吸湿用品包括:可透液体的顶片;与顶片相连的不透液体的底片;以及位于顶片和底片之间的吸湿芯,吸湿芯具有衣物面和身体面;底片包括内网片和外网片,内网片的至少一部分与吸湿芯的衣物面并置,外网片包括整体搭接区,该搭接区至少位于前、后腰区或裆区中的一个上并具有机械预变形的部分,提供能够缠卷互补子固定部件的接合元件的隆起部分,子固定部件位于前、后腰区中的另一个上并具有基底和从基底突出出来的多个接合元件;内网片和外网片相接合。
附图说明
图1为一次性尿布的透视图,其中该吸湿用品包含本发明的具有整体搭接区的底片的一个实施例;
图2为图1所示一次性尿布的剖面图;
图3为本发明一备选实施例的剖面图;
图4为子固定部件的侧向放大视图;
图5为包含整体搭接区的本发明底片的制作过程侧向示意图;
图6为包含整体搭接区的本发明底片的备选实施例的制作过程侧向示意图;
图7为制作本发明的一部分装置的透视图;
图8为本发明一实施例的透视图。
具体实施方式
这里所用的“吸湿用品”一词指的是吸收和容纳身体排泄物的用品,更具体地说是指贴放或靠近穿着者的身体来吸收和容纳各种人体排泄物的用品。吸湿用品一般根据它们是否再次使用或一次性使用来分类。“一次性”指的是用品一般在使用一次之后即被丢弃(即它们一般不准备被洗涤或者储存或再使用)。本发明的吸湿用品最好是一次性的吸湿用品。吸湿用品还可以进一步限定为是否为“整体的”,即它们不需分开操作的部分或它们是否包括一尿布系统的一个部件,如分开的保持件和垫。本发明的一次性用品最好为整体的。本发明整体的一次性吸湿用品的一个优选实施例为如图1所示的尿布20。这里所用的“尿布”一词指的是一般由婴儿和/或失禁成人围绕躯干下部穿着的,用于接纳和储存身体排泄物的衣物。但是应该清楚,本发明也可以用于其它一次性吸湿用品中,如失禁短裤、内衣式吸湿衬垫、一次性训练裤、有腰带式尿布、尿布固定物、卫生巾等。
图1为尿布20的一个实施例的平面图,其中尿布处于平展、未收缩状态(即由弹性导致的收缩被拉开),并且部分结构被剖开以便更清楚地显示尿布20的下面结构。尿布20的与穿着者接触的部分远离观察者。图1所示的尿布20具有一个前腰区52、一个后腰区56和一个位于前腰区52与后腰区56之间的裆区54。腰区一般包括那些当穿着时环绕穿着者的腰部的尿布20部分。腰区可包括弹性部件,这样它们绕穿着者的腰部收拢,从而使得尿布更合身、密封更好。裆区54为尿布20位于前腰区52和后腰区56之间的部分,当穿上尿布时,所述裆区一般位于穿着者的两腿之间。
尿布20最好包括一可透液体的顶片22、一不透液体的底片24和最好位于顶片22和底片24之间的吸湿芯26。吸湿芯26最好具有一般背离穿着者的衣物面60和一般朝向穿着者的身体面62。尿布20还最好包括钩环型固定系统50,该系统包括至少一个接合部件70(子固定部件)和至少一个搭接区40(母固定部件)。尿布20还可包括本领域公知的一些部件,包括腿箍、前后耳片、腰套件(waistcap features)、弹性件等,从而使之更合身、密封更好并且更美观。这些附加部件在本领域是公知的,并在美国专利3,860,003和美国专利5,151,092中有描述。这些专利文献在此作为引证被结合至本申请中。
在尿布20的优选实施例中,底片24的长度和宽度尺寸一般比吸湿芯26的相应尺寸大。底片24延伸超出吸湿芯26的边,并形成吸湿用品的周边35。周边35限定尿布20的外部尺寸,换言之限定尿布的边。周边35包括纵边32和端边34。如图1所示,顶片沿尿布20的端边34和纵边32与底片24有共同的边。
吸湿芯可以是任何材料的,只要该材料为可压缩、柔顺、对穿着者的皮肤无刺激,并能够吸收和储存液体和某些身体排泄物即可。吸湿芯26可制成任何尺寸和形状(例如矩形、沙漏形、不对称形等),并可由任何一般用于一次性尿布和其它吸湿用品中的材料,如一般称作气流毡的粉碎木浆制成。其它适合的吸湿材料包括绉纱纤维素填料、吸湿泡沫、吸湿海绵、超吸湿聚合物、吸湿凝胶材料或其它等效材料,或为上述材料的混合物。吸湿芯26的总吸收能力应与尿布20的使用目的相符合。另外,吸湿芯26的吸收能力和构形可为各种各样的,以便适合从婴儿至成人的穿着者体型范围(例如吸湿芯可以有各种厚度或亲水性梯度、表面张力差、低密度区或可包含或不包含吸湿凝胶材料)。
吸湿芯26可包括吸湿材料层,该吸湿材料具有亲水性纤维和吸湿凝胶材料(水凝胶)颗粒,如1986年9月9日授予Paul T.Weisman和Steven A.Goldman的名称为“High-Density Absorbent Structure”的美国专利4,610,678中描述的吸湿结构。该文献在此通过引证被结合到本申请中。吸湿芯26的优选实施例一般如下述文献的描述:1993年8月10日授予Alemany等人的名称为“Absorbent Article With Elastic Waist Feature and Enhanced Absorbency”的美国专利5,234,423;1993年6月8日授予Young等人的名称为“AbsorbentStructures Containing Superabsorbent Material and Web of Wetlaid StiffenedFibers”的美国专利5,217,445,该文献在此通过引证被结合到本申请中。其它可用于本发明中的吸湿芯的例子为:1992年6月23日授予Roe等人的名称为“Porous,Absorbent,Polymeric Macrostructures and Methods of Making theSame”的美国专利5,124,188;1992年8月11日授予Herron等人的名称为“Absorbent Structure Containing Individualized Polycarboxylic Acid CrosslinkedWood Pulp Cellulose Fibers”的美国专利5,137,537;1993年1月19日授予Berg等人的名称为“Absorbent Members Containing Interparicle CrosslinkedAggregates”的美国专利5,180,622;1993年11月9日授予DesMarais等人的名称为“Absorbent Foam Materials for Aqueous Body Fluids and AbsorbentArticles containing Such Materials”的美国专利5,260,345;6月16日授予PaulT.Weisman,Dawn I.Houghton和Dale A.Gellert的名称为“Absorbent ArticleWith Dual-Layered Cores”的美国专利4,673,402;以及1992年7月23日公开的,名称为“Absorbent Article HaVing Rapid Acquiring,Multiple LayerAbsorbent Core”的PCT专利申请WO92/11830。所有上述专利和专利申请在此通过引证被结合至本申请中。
顶片22最好为柔顺的,手感柔软的,并对穿着者的皮肤无刺激。另外,顶片22最好是可透液体的,允许液体很容易穿过它的整个厚度。适合制作顶片的材料范围很宽,如多孔泡沫、网状泡沫、成型薄膜、有孔塑料薄膜、天然纤维(例如木或棉纤维)、合成纤维(例如聚酯或聚丙烯纤维)或天然与合成纤维的混合。可采用许多制作技术来制造顶片22,例如顶片22可以是纺织的或无纺的,可以经纺粘、梳理等。优选的顶片22包括聚丙烯纤维,纤度约2.2登尼尔,例如由International Paper Company,of Walpole.Massachusetts的分支机构Veratec,Inc.制造的P-8。优选的顶片22以纺织领域技术人员公知的方法经梳理并热粘接。
顶片22最好由疏水性材料制作,从而使穿着者的皮肤与吸湿芯26中的液体隔离。如果顶片22是由疏水性材料制成的,则至少顶片22的上表面经亲水性处理,这样液体能够更快地穿过顶片22,从而减少了身体排泄物将从顶片22流出而不是被拉入穿过顶片22并被吸湿芯26吸收的可能。顶片22可经表面活性剂处理而变得具有亲水性,如用表面活性剂喷涂顶片22材料,或将材料浸入表面活性剂中。在下述专利中对这种处理有更详细的描述:1991年1月29日授予Reising等人的名称为“Absorbent Articles withMultiple Layer Absorbent Layers”的美国专利4,988,344以及1991年1月29日授予Reising的名称为“Absorbent Articles with Rapid Acquiring AbsorbentCores”的美国专利4,988,345。上述每篇专利文献在此通过引证而结合至本申请中。
可采用尿布制造领域中公知的适当方式将顶片22和底片24连接在一起。这里所用的“连接”包括将顶片22直接固定到底片24上的所谓顶片22直接与底片24相连的构形,还包括将顶片22固定到中间部件上,而中间部件又固定到底片24上的所谓顶片22与底片24不直接相连的构形。在优选实施例中,顶片22与底片24在尿布的周边35通过粘接剂或本领域公知的方法彼此直接相连。后面关于底片24的讨论中还将讨论其它适合的备选附着方法。
底片24最好邻近吸湿芯26的衣物面60,即背向穿着者的一面,并且最好以本领域公知的附着手段固定在那里。(但是在一些实施例中也考虑使底片24的至少一部分,最好是邻近搭接区40处不与吸湿芯26相连)。例如,可采用均匀连续的粘接剂层、有图形的粘接剂层或粘接剂间断线或点阵列来将底片固定到吸湿芯26上。另外,附着方法可包括热粘接、压力粘接、超声粘接、动态机械粘接或任何适合的附着方法,或如本领域公知的上述附着方法的组合。已发现令人满意的粘接剂为由H.B.Fuller Company of St.Paul Minn制造的商品标号为HL-1258的粘接剂。吸湿芯附着装置最好包括粘接剂纤丝的开放型图形网格,如1986年3月4日授予J.A.Minetola和David R.Tucker的名称为“Disposable Waste Containment Garment”的美国专利4,573,986所述的那样。该文献在此通过引证被结合到本申请中。包括一些粘接剂纤丝直线卷曲成图形的纤丝开放型网格的附着装置的例子在1975年10月7日授予Sprague,Jr.的美国专利3,911,173;1978年11月22日授予Zieckler等人的美国专利3,785,996以及1989年6月27日授予Werenicz的美国专利4,842,666的对设备与方法的描述中已示出。上述这些专利在此通过引证被结合到本申请中。
在优选实施例中,底片24包括至少两个网片的叠层,即如图2所示的一个内网片90和一个外网片30的叠层。内网片90的至少一部分最好与吸湿芯26的衣物面60相邻。内网片90最好作为阻挡层来防止液体通过底片24,而外网片30最好是为整体搭接区40提供的,并且具有美观、惹人喜爱的品质,如柔软和具备类似织物的外观。因此,在优选实施例中,底片24的内网片90最好包括薄的塑料薄膜,或为其它柔顺的不透液体或亲水性材料。(这里所用的“柔顺”一词指的是材料为顺从的,并且很容易与人体的大致形状和轮廓一致。)底片24也可以如期望那样是透气的,这样在防止排泄物通过底片24的同时允许蒸汽从吸湿芯中逸出。用作底片24内网片90的薄膜的例子为厚度约0.012毫米(0.5密耳)至约0.051毫米(2.0密耳)的聚乙烯薄膜。合适的聚乙烯薄膜为分别由Tredegar Film Products,Inc.of Terre Haute,IN和the Clopay Corporation of Cincinnati,OH生产的商标为Tredegar X8526和Clopay 1401的聚乙烯薄膜。用作外网片30的无纺织物的例子为由Intemational Paper Company of Wapole,Massachusetts的分支机构Veratec,Inc.生产的P-8或P-11无纺网片材料。用于内网片90中的其它材料包括纺织网片、成型薄膜、有孔薄膜、泡沫、稀松平纹织物等。
如上所述的外网片30是底片24位于吸湿用品外表面的部分。因此,外网片30应具有某些特性,如外网片30应具有较为美观、惹人喜爱的品质,如柔软并具有衣物的外观。另外,外网片30应包括可制成与子固定部件70的钩或其它接合元件72相接合的部件的材料。一般来说这种材料包括纤维、纤维无纺材料、有孔材料、成型薄膜、纺织材料、泡沫、绉纱等。可用于外网片30的两种合适的无纺材料为由International Paper Company ofWalpole,Massachusetts的分支机构Veratec,Inc.制造的无纺网片材料P-8或P-11。
外网片30最好以本领域公知的方法层叠至内网片90上。这里所用的“层叠”指的是具有重合表面的网片彼此粘接,从而得到整体网片材料。粘接的面积可以占重合表面面积的5%至100%。(当一个或多个粗糙或不平的表面粘接时,例如当无纺物、有孔薄膜等相连时,叠层出现在当它们处于平展的,彼此面对面构形,彼此接触的材料相互粘接的场合。)合适的层叠方法可包括全部粘接、螺旋粘接、热熔粘接、丝网或照相凹板印制、加热、加压、真空成型、挤压铺絮或超声粘接等。
底片24最好还包括一个整体搭接区40。这里所用的“整体的”一词指搭接区40时其含义为搭接区40是由底片24结构的至少一部分形成的。这样,本发明整体搭接区40不需额外材料而提供有效的母固定元件的缠卷特性。另外,整体搭接区40包括底片24的一个或一些部分,这些部分经机械预变形或其它改变来产生隆起部分44,该隆起部分能够缠卷到一互补子固定部件70的接合元件72上。底片24的这些机械改变可很方便地在尿布制造生产线中或不在该生产线中高速低成本地进行。(“机械预变形”一词指的是一种方法,即,使网片的一部分受一定程度的局部机械拉伸,从而使网片的受机械预变形部分永久被拉长。)
图2为图1所示包括整体搭接区40的底片24的优选结构沿2-2线剖开的剖视图。如图所示,最好是外网片30的经机械预变形部分位于尿布20的前腰区52的至少一部分处,这样与尿布20的背部相连的子固定部件70可与搭接区40接合而使尿布20的侧面封闭。但也可考虑其它实施例为搭接区40位于前腰区52以外的地方,或采用一个以上的搭接区40,从而得到更宽的调节范围或更多的处置手段。
在本发明的优选实施例中,外网片30的经机械预变形部分不象如上所述那样与内网片90层叠。更优选的是,内网片90和外网片30在搭接区40处彼此不粘接。但是,也可考虑其它实施例为内网片90和外网片30在搭接区40处彼此断续粘接。这里所用的“断续粘接”指的是网片以一个或多个独立的、分散的点彼此粘接,这种粘接是不连续的,或粘接图形具有不粘接的开放面积。在优选实施例中,外网片30经机械预变形部分与内网片90的断续粘接相连部分的面积约小于90%的网片重合表面平面面积。更优选的是,断续粘接相连的面积约小于70%的重合表面平面面积,而最优选的是,断续粘接相连的面积约小于25%的重合表面面积。合适的断续粘接图形在1994年8月9日以King等人的名义申请的审查中的美国专利申请08/257,571中示出并进行了描述。King等人专利申请中的附图和描述在此通过引证被结合到本申请中。在外网片30的搭接区40和内网片90之间采用断续粘接或不粘接使得由预变形方法产生的搭接区40的隆起部分44得以完全保持甚至部分增强。这样有助于确保搭接区40能够接纳并缠卷到子固定部件70的接合元件72上。
为了进一步增强本发明固定系统50的撕裂强度,可使底片24邻近搭接区40的部分不附着在直接相邻的层,例如吸湿芯26上。由于底片24邻近搭接区40的部分不附着在直接相邻的层上,因此底片24能够自由地从搭接区40处升起或向上抬起,由于钩从搭接区40的环上分离,所述搭接区40也能够升起或向上抬起,这样进一步增强了固定系统50的撕裂强度。
尽管可采用任何公知的方法来拉长网片,使之产生搭接区40的隆起部分44,但一般来说采用递增机械拉伸方法可得到令人满意的结果。例如,内网片30可导入通过一个或多个具有槽或齿的辊,这些辊将递增拉长网片的预定部分。作为备选例,内网片30也可以如公知的那样受到环轧或经深压纹技术处理。下述专利文献中描述了一些递增机械拉伸方法的例子:1992年9月29日授予Buell等人的美国专利5,151,092;1992年9月1日授予Webber等人的名称为“Method For Sequentially Streching Zero Strain StretchLaminate Web To Impart Elasticity Thereto Without Rupturing The Web”的美国专利5,143,679;1996年5月21日授予Chappell等人的名称为“Web MaterialsExhibiting Elastic-Like Behavior”的美国专利5,518,801。上述每篇专利文献在此通过引证结合到本申请中。图7示出了后面将详细描述的优选的递增拉伸系统100。
图3为本发明包括增高元件42的另一实施例的剖面图。增高元件42位于内网片90和整体搭接区40的至少部分隆起部分44之间,使隆起部分44与内网片90隔开一段距离。这段距离使搭接区40更厚一些,从而可增强固定系统50的效果。例如,增高元件42可为子固定部件70的接合元件72提供一空间,使之可穿入隆起部分44中,这样搭接区40可更有效地缠卷接合元件72。因此,增高元件42对包括基重相对较低的无纺网片的外网片30来说特别有利,因为该外网片即使在经机械变形之后仍几乎不增高;以及/或者增高元件42对内网片90包括密度相对较高的材料或几乎没有开口的材料来允许接合元件72适当地穿入整体搭接区40的隆起部分44的情况来说也特别有利。
增高元件42可以包括本领域公知的任何材料,只要它能够接纳子固定部件70的接合元件72即可。在优选实施例中,增高元件42在它的结构中有大量的开放空间,从而为接合元件72提供了容纳空间。用作增高元件的合适材料包括无纺或纺织网片、泡沫、有孔薄膜、成型薄膜、稀洋纱、纤维、纸产品或任何其它材料或这些能够增高的材料的混合。(这里所用的“增高”一词指的是在Z方向上产生空间。例如,由层叠在两个其它网片之间的无纺网片产生的增高值可以为无纺网片的厚度。)下述专利文献描述了一些增高元件的例子:1995年4月18日授予David J.K.Goulait的名称为“Multi-layer Female Component for Refastenable Fastening Device and MethodofMaking the Same”的美国专利5,407,439。该专利在此通过引证结合至本申请中。
包括有增高元件42的实施例可有多种构成形式,只要整体搭接区40的隆起部分44能够缠卷到子固定部件70的接合元件72上即可。例如,包括有隆起部分44的外网片30的机械预变形部分可连续或断续地与增高元件42相连,或甚至根本不与增高元件42相连。另外,增高元件42可连续或断续地与内网片90相连,或由内网片90的叠层保持在适当的位置上,而外网片30包绕该增高元件42。增高元件42还可与外网片30的已预变形的所有部分或任何部分相邻。
在一些实施例中,搭接区40具有的第一固定面积A大于子部件70的接合元件72所具有的第二固定面积B。较大的搭接区40有利于为较宽范围的穿着者提供方便,一般来说固定方便一些。(如图8所示,搭接区的第一固定面积A等于搭接区40的长L乘以搭接区40的宽W。子部件第二固定面积B等于长L2乘以宽W2。复杂形状的面积可采用公知的数学公式确定。如果在一个功能性主固定系统或用后处理(disposal)固定系统中包括多个搭接区或子部件,则面积A或B等于各单个元件面积之和。但是,用后处理固定系统的面积一般不包括主固定系统的面积,反之亦然。)可供选择的是,搭接区第一固定面积A可小于子部件第二固定面积B。举例来说,一次性吸湿用品的用后处理固定系统一般需要的固定强度小于主固定系统。本发明低成本的搭接区40使得可在底片24中整体形成一个相对较小的搭接区40作为用后处理固定。
这里所用的“子部件”一词用于代表固定系统50的具有接合元件72,如钩的部分。子固定部件70可包括传统的,市场上可买到的钩材料,但不限于这种传统的钩。例如,接合元件72可具有公知的任何形状,如钩形、“T”形、蘑菇形、叉形等。另外,制作子部件70材料范围很宽。这种合适的材料包括(但不限于)尼龙、聚酯、聚丙烯、或这些或其它材料的任何组合。一种合适的子部件70可有多个从织物基底74凸出出来的成形接合元件,如市场上可买到的,由Minnesota Mining and Manufacturing Company,St.Paul,Minesota出售的“SCOTCHMATE”牌FJ3402号材料。优选的子部件在1989年7月11日授予C.L.Scripps的名称为“Disposable Diaper Having AnImproved Fastening Device”的美国专利4,846,815中进行了描述。其它特别优选的子部件为叉,该部件和制作方法在下述专利中有描述:1991年10月22日授予Thomas等人的名称为“Mechanical Fastening Prong”的美国专利5,058,247;1992年5月26日授予Thomas等人的名称为“Process for Producinga Mechanical Fastener”的美国专利5,116,563;1993年1月19日授予Thomas等人的名称为“Process of Manufacturing A Refastenable Mechanical FasteningSysten”的美国专利5,180,534;以及1993年7月27日授予Thomas的名称为“Process of manufacturing A Refastenable Fastening Systen”的美国专利5,230,851。上述每篇专利在此通过引证被结合到本申请中。
图4示出了合适的子固定部件70的一个例子。子固定部件70最好包括多个从基底74向外延伸出的接合元件72。每个接合元件72最好包括柄78和头76。柄78为接合部件72与基底74相邻的部分,并支承着头76。头76为接合部件72与基底74相距一定距离的部分,这样它可以穿入母固定部件的“环”并与之接合。在本发明中,子固定部件70的接合元件72最好穿入并缠卷整体搭接区40的隆起部分44。
本发明包括整体搭接区40的底片的制作方法十分简单并且经济有效。下面的生产方法可结合到尿布生产线中去,或与同底片相连的吸湿用品制作不在同一时间、同一地方进行。尽管这里只详细描述了制作本发明底片的方法的很少几个实施例,但应清楚,能产生相似结果的任何或全部工艺步骤的替代步骤均被认为是包括不同次序的相似步骤的工艺。
图5示出了制作本发明具有整体搭接区40的底片的方法。由储存辊或制作过程的其它部分提供外网片30和内网片90。外网片30直接送入机械预变形装置100中。机械预变形装置100拉伸外网片并使外网片的至少一部分产生永久伸长而形成隆起部分44。拉伸装置100最好包括一对内啮合递增拉伸辊302和304。辊302最好包括多个齿306和相应的槽307,这些槽307与辊304上的槽309内啮合或啮合。当网片,例如外网片30通过递增拉伸辊302和304之间时,网片30被拉伸并/或拉长产生递增拉伸区域314。外网片30的递增拉伸区域314形成隆起部分44。通过辊302和辊304光滑部分316之间的网片30部分一般不变形,故变成与内网片90直接相连而形成底片24的外网片30部分。精确构形、间距、尺寸、相对齿和槽之间的重叠均可以调节,从而改变隆起部分44的高度、位置和密度。另外,递增拉伸可在沿机器方向或垂直机器方向进行,或不沿机器方向、垂直机器方向进行。
内网片90通过粘接剂涂敷器110,该涂敷器将粘接剂施加到内网片90的一面上。(应该明白,也可采用其它装置来代替该粘接剂涂敷器向内网片90或外网片30上施加连接装置。可以在采用其它粘接手段,如超声、加热、加压等情况下这样做。)然后内网片90和外网片30通过引导网片彼此面对面接触的辊120。网片以层叠方式从该辊中出来,其中外网片30具有隆起部分44,该部件使底片叠层24具有整体搭接区40。优选的是,层叠过程包括隆起部分44的使外网片30至少一部分没有粘接剂或其它粘接装置,这样搭接区40可产生足够的增高元件来接纳和缠卷子固定部件70的接合元件72。
在备选实施例中,如图6所示,采用本领域公知的切割与滑动单元130或其它装置提供附加增高元件42。如上所述,外网片30导引通过预变形装置,使构成搭接区40的网片的至少一部分被拉伸。内网片90施加有一种粘接剂或其它连接装置,并且连接有增高元件42。然后内网片90层压至外网片30上,而具有增高元件的地方使搭接区40的至少一部分远离内网片90一定的距离。应该明白,也可考虑采用备选粘接装置,得到增高元件与外网片30相连或既不与内网片90相连,也不与外网片30相连的构形。
尽管这里显示和描述了本发明的具体实施例,但很显然,对本领域技术人员来说,在不背离本发明精神与范围的前提下可进行各种变形与修饰。因此本发明的权利要求书将覆盖所有这些在本发明范围之内的变形与修饰。

Claims (13)

1.一种一次性吸湿用品,具有前腰区、后腰区和位于所述前腰区和所述后腰区之间的裆区,该吸湿用品包括:
可透液体的顶片;
与所述顶片相连的不透液体的底片;以及
位于所述顶片和所述底片之间的吸湿芯,所述吸湿芯具有衣物面和身体面;
所述底片包括内网片和外网片,所述内网片的至少一部分与所述吸湿芯的所述衣物面并置,所述外网片包括整体搭接区,该搭接区至少位于前、后腰区或裆区中的一个上并具有机械预变形的部分,以提供隆起部分,该隆起部分能够缠卷互补子固定部件的接合元件,所述子固定部件位于前、后腰区中的另一个上并具有基底和从所述基底突出出来的多个接合元件;
所述内网片和所述外网片相接合。
2.如权利要求1所述的一次性吸湿用品,其中所述内网片和所述外网片在除所述搭接区之外的其它地方粘接在一起。
3.如权利要求1所述的一次性吸湿用品,其中所述内网片和所述外网片层叠在一起。
4.如权利要求1所述的一次性吸湿用品,其中所述外网片为无纺网片。
5.如权利要求1所述的一次性吸湿用品,其中所述外网片的所述机械预变形部分与所述内网片断续相连。
6.如权利要求1所述的一次性吸湿用品,其中所述整体搭接区位于所述前腰区的至少一部分内。
7.如权利要求6所述的一次性吸湿用品,还包括位于所述后腰区的互补子固定部件,当所述子固定部件与所述搭接区可分开地相连时,即形成封闭。
8.如权利要求1所述的一次性吸湿用品,其中所述整体搭接区的至少一部分位于所述裆区内而形成用后处理装置。
9.如权利要求1所述的一次性吸湿用品,其中所述整体搭接区的至少一部分位于所述后腰区内而形成用后处理装置。
10.如权利要求1所述的一次性吸湿用品,还包括位于所述外网片的所述机械预变形部分与所述内网片之间的增高元件。
11.如权利要求10所述的一次性吸湿用品,其中所述外网片与所述增高元件断续相连。
12.如权利要求10所述的一次性吸湿用品,其中所述增高元件选自下述材料组中的一个:无纺网片、泡沫、成型薄膜、稀洋纱或有孔薄膜。
13.如权利要求1所述的一次性吸湿用品,其中所述整体搭接区具有第一固定面积,所述子固定部件具有第二固定面积,所述第一固定面积小于所述第二固定面积。
CN97181261A 1996-11-14 1997-11-06 具有整体的底片搭接区的一次性尿布 Expired - Fee Related CN1125629C (zh)

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