CN1088078A - 由具有双重z向梯度的纤维基体组成的吸收体结构 - Google Patents

由具有双重z向梯度的纤维基体组成的吸收体结构 Download PDF

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Publication number
CN1088078A
CN1088078A CN93114745A CN93114745A CN1088078A CN 1088078 A CN1088078 A CN 1088078A CN 93114745 A CN93114745 A CN 93114745A CN 93114745 A CN93114745 A CN 93114745A CN 1088078 A CN1088078 A CN 1088078A
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Prior art keywords
fibrous matrix
absorbent structure
fibrous
density
superabsorbent materials
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CN93114745A
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M·J·法尔克斯
D·R·施林茨
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Kimberly Clark Corp
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Kimberly Clark Corp
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Abstract

公开了一种吸收体结构,它包含一个具有双重Z 向梯度的纤维基体,其中,强吸收性材料的浓度从纤 维基体的第一主平面向与之对置的第二主平面减小, 而纤维基体的密度从第一主平面向第二主体面增 加。还公开了一种含有这种吸收体结构的吸收性制 品。

Description

本发明涉及一种适合用于吸收性制品中的吸收体结构。具体而言,本发明涉及一种具有双重Z向梯度的吸收体结构。
适用于吸收性制品的吸收体结构是已知的。通常这种吸收体结构包括一个吸收性纤维基体,诸如粉沫状木浆绒的毛层。为提高这种吸收体结构的吸收能力,通常在结构中加入一种强吸收能力的材料,称之为超级吸收材料。这种强吸收能力的材料通常可至少吸收约10倍于其自身重量的水,最好约15倍,甚至最好从最少20倍至100倍。
为了提高由木浆绒基体构成的吸收体结构的吸收流体的能力,现有的做法是使木浆绒基体具有Z向密度梯度。Z向指的是所给定纤维基体的厚度方向。也就是说,一个纤维基体通常包括对置的第一和第二主平面。此第一和与之对置的第二主平面,确定了纤维基体的长度和宽度(X和Y方向)。Z方向指的是第一和第二主平面之间的相隔距离(厚度)。
例如,1991年4月23日发布的Bernardin的美国专利5009650,介绍了一种具有一层纤维上层和一层纤维下层的吸收体结构。上层的密度从0.03至0.4克/厘米3,下层密度为0.14至0.3克/厘米3。由此可见,Bernardin介绍了一种含上层和下层的纤维基体,由于上层的密度小,下层的密度大,从而在纤维基体中存在着密度梯度。这种结构一般认为非常适合于快速吸收排放在上层的液体,并将液体传给下层,从而将液体从排出点传走。
类似地,1987.10.13发布的Kellenberger等人的美国专利699823,介绍了具有Z向超级吸收材料浓度梯度的非分层式吸收体结构。Kellenberger介绍了一种木浆绒的纤维基体,其中含有超级吸收剂的颗粒。据说散布在纤维基体内的超级吸收剂颗粒的浓度,从纤维基体的一个平面到相对的另一个平面逐渐增加。超级吸收剂材料的这种结构,据认为,当具有超级吸收剂颗粒的浓度较低的平面位于邻近穿戴者身体时,可避免胶化堵塞现象。
尽管密度梯度和超级吸收剂的梯度二者在技术上均为已知,并业已证明它们对于改进吸收用品的特性是有效的,但希望进一步优化适用于吸收用品的吸收体结构。
本发明一方面涉及一种吸收体结构,它包含一种纤维基体,此纤维基体具有第一主平面、第二主平面和将第一和第二主平面隔开的厚度。纤维基体含有一种强吸收能力的材料。包含第一主平面的纤维基体厚度的第一个一半,与包含第二主平面的纤维基体厚度的第二个一半相比,其强吸收材料的浓度较大,而其平均密度较低。
本发明的第二方面涉及一种吸收性的制品。这种吸收性制品由一个外覆盖层、一个液体可渗透的体侧衬垫、以及一个置于体侧衬垫和外覆盖层之间的吸收体结构组成。吸收体结构由具有第一主平面、第二主平面以及将第一和第二主平面分开的一定厚度的纤维基体组成。纤维基体包含一种强吸收性材料。这种纤维基体的特征是,包含第一主平面的纤维基体厚度的第一个一半,与含第二主平面的纤维基体厚度的第二个一半相比,其强吸收材料的浓度较大,而其平均密度较低。在最佳实施例中,第一主平面比第二主平面更靠近上述的体侧衬底。
图1        按照本发明的吸收性制品的透视图;
图2        沿图1所示吸收性制品中2-2线的横剖面图;
图3        按照本发明吸收性制品局部切除的透视图;
图4        沿图3所示制品中4-4线的剖视图;
图5        按照本发明吸收性制品局部切除透视图。
本发明涉及一种适用于吸收性制品中的吸收体结构,这些制品例如为尿布,训练裤,妇女卫生用品,成人大小便失禁时用的制品,绷带等。尽管本发明的最佳实施例是通过将吸收体结构用在婴幼儿尿布中为例进行说明的,但对本专业熟悉的人可以理解,此种吸收体结构同样适用于其他吸收性制品。
本发明的吸收体结构由包括强吸收性材料的纤维基体组成。纤维基体有双重Z向梯度。具体而言,纤维基体有Z向密度梯度和Z向强吸收性材料的浓度梯度。本文所说的Z向是指吸收体结构纤维基体的厚度。这就是说,本发明的纤维基体有第一主平面,第二主平面,以及间隔第一和第二主平面的厚度。第一和第二主平面确定了纤维基体的长和宽(X和Y方向)。第一和第二主平面之间的距离,确定了纤维基体的,或Z向的厚度。对本专业熟悉的人可以理解,Z向通常垂直于纤维基体的第一和第二主平面。
纤维基体的特征为,包含第一主平面的纤维基体厚度的第一个一半,与包含第二主平面的纤维基体厚度的另一个一半相比其强吸收性材料的浓度较高,而其平均密度较低。
本文所说的平均密度,指的是沿纤维基体长度和宽度测量的有代表性的密度抽样平均值。密度在载荷为0.2磅/平方寸的情况下确定。
本发明的纤维基体可由多种多样的材料组成。例如,纤维基体可用适当的天然或合成纤维组成。适用的天然纤维,包括木浆绒,棉短绒,棉花,蔗渣纤维等。适用的合成纤维,包括熔喷型和纺粘型聚合纤维,它们例如由聚烯烃、聚酰胺、聚亚胺酯等构成。人造纤维如人造丝、醋酸纤维也适用于构成纤维基体。天然的、合成的和/或人造纤维的组合也是适用的。在本发明的一个最佳实施例中,纤维基体由木浆绒构成。
纤维基体可由气流纤维成网、通过纺粘或熔喷法、通过梳理工艺、通过湿法成网工艺制成,或通过对本专业熟悉的人们所了解的其他构成纤维基体的方法。
纤维基体包含通常称为超级吸收剂类型的强吸收材料。这种强吸收性材料,通常至少可吸收大约10倍,最好20倍,并直至100倍于其自身重量的水。强吸收材料可由有机材料制成,这种材料可包括天然材料,如琼脂、果胶和瓜尔豆胶,以及包括合成材料,如合成水凝胶聚合物。合成水凝胶聚合物,例如包括羧酸甲基纤维素、聚丙烯酸的碱金属盐、聚丙烯酰胺、聚乙烯醇、乙烯马来酐共聚物、聚乙烯醚、羟基丙基纤维素、聚乙烯吗啉、乙烯磺酸的聚合物和共聚物、聚丙烯酸盐、聚丙烯酰胺、聚乙烯吡啶等。其他适用的聚合物包括水解了的丙烯腈接技的淀粉、丙烯酸接技的淀粉、以及异丁烯马来酐共聚物和它们的混合物。水凝胶聚合物最好轻度交联,使材料变得基本上不溶于水。交联例如可通过辐照,或共价的、离子的、范德        华力或氢键合。适用的材料可从各种商业公司买到,如Dow        Chemical        Company,Hoechst-Celanese        Corporation,Allied        Colloid        Inc.和Stochhause        Inc.在本发明的最佳实施例中,强吸收性材料是聚丙烯酸的碱金属盐或淀粉接技的聚丙烯酸碱金属盐。
强吸收性材料包含在纤维基体之中。将强吸收材料掺入纤维基体中的方法对熟悉本专业的人是已知的。适用的方法包括,将强吸收性材料在组成基体时加入基体中去,例如将纤维基体的纤维和强吸水性材料同时用气流成网,或同时放置纤维基体的纤维和强吸水性材料用湿法成网。另一种做法是,亦可以在构成纤维基体后,再将强吸收性材料加在纤维基体上。其它方法包括将强吸收性材料放在两层材料薄片之间构成夹心的形式,两层中至少一层是纤维,并可渗透液体。强吸收性材料可大体均匀地放在两层材料薄片之间,或可以放在由两层薄片构成的一些离散的小袋中。
如上所述,纤维基体具有Z向密度梯度和Z向强吸收性材料的浓度梯度。在本文中,密度指的是包含强吸收性材料的纤维基体密度;也就是说,纤维基体和强吸收性材料混合物的密度。强吸收性材料浓度指的是,在纤维基体中的强吸收性材料,占纤维基体和强吸收性材料总重量的重量百分比。密度较小的纤维基体部分,是纤维基体中强吸收性材料浓度较大的部分。反过来说,密度较大的纤维基体部分,是纤维基体中强吸收性材料浓度较小的部分。或用另一种方式来叙述为,纤维基体有第一主平面和第二主平面,第一主平面和第二主平面相隔的距离是纤维基体的厚度;包含第一主平面的纤维基体厚度的一半,与包含第二主平面的纤维基体厚度的另一半相比,含有浓度较高的强吸收性材料和较低的平均密度。
纤维基体的形式,可以是整体的单层,或由多层组成。如果纤维基体由多层合成,在各层之间液体可互相流通,使在某一种纤维层中的液体,可流往或传往另一个纤维层。例如,纤维层可由对本专业熟悉的人们已知的纤维素薄片分开,为了确定多层纤维基体的厚度,只应包括那些含有纤维和强吸收性材料的纤维层。因此,如果纤维层由一个不含有强吸收性材料的纤维层分开,则在确定纤维基体厚度时不包括此层的厚度在内。
当纤维基体由两个或两个以上单独构成的含强吸收性材料的纤维层组成,则其中一层有比其他层低的平均密度,和比其他各层浓度大的吸收性材料。强吸收性材料可在各层中以大体均匀的方式分布,或在各纤维层中有一层均匀分布,在其他各层中不均匀分布。
当纤维基体由整体单层构成,则强吸收性材料的浓度可以沿纤维基体的厚度,以一种逐渐的、非分级的方式,或以多级的方式增加。类似地,密度可以以非分级的或逐级的方式沿厚度减小。
当纤维基体由两个或两个以上的纤维层组成时,这些纤维层可以有同样的或不同的单位重量。在一种最佳实施例中,密度较低强吸收性材料浓度较高的第一个纤维层,其单位重量约从150至1500克/米2,密度较高强吸收性材料浓度较低的第二个纤维层,其单位重量约从100至1250克/米2,第一个纤维层的单位重量大于第二个纤维层。具体而言,第一层纤维层的单位重量,比第二个纤维层的单位重量大约大10%,有利的是大20%,最好是25%。
当纤维基体由具有逐渐地非分级式强吸收性材料浓度梯度的整体单层构成时,为达到本发明的目的,可以这样确定局部的强吸收性材料浓度,沿垂直于Z向的平面,通过纤维基体取下一片,以露出纤维基体中被选定的层。基体暴露区被强吸收性材料颗粒覆盖的百分比,被看作是面积百分率浓度。一旦确定了面积百分率浓度,则重量百分率浓度可通过假设为球形颗粒、将面积百分率浓度3/2次方、并根据取下的这一片中不同材料的密度算出。
此外,一旦确定了无论是单层或多层纤维基体的厚度,则纤维基体可通过在沿垂直于纤维基体Z向平面的计算位置处,切开纤维基体分出其厚度的一半。纤维基体各半部的平均密度,通过沿纤维基体长度和宽度确定的有代表性的密度值来确定。然后计算平均密度。在纤维基体一半厚度中强吸收性材料的浓度,可通过分析确定。例如,当强吸收性材料由聚丙烯酸的钠盐组成时,则在各一半厚度中的强吸收性材料的浓度,可以通过钠的灰分试验确定。
包含第一主平面的纤维基体第一个半厚度,其中强吸收性材料占纤维基体和存在于此纤维基体第一个半厚度中的强吸收性材料总重量的约20%至95%(重量百分比),最好是20%至50%(重量百分比),含第一主平面的纤维基体第一个半厚度的密度约为0.01至0.2,最好是从0.05至0.2克/厘米3
包含第二主平面的纤维基体第二个半厚度,其中强吸收材料应占纤维基体和存在于此纤维基体第二个半厚度中的强吸收性材料总重量的5%至50%,最好是5%至35%(重量百分比)。包含第二主平面的纤维基体厚度的第二个一半的密度,应从0.1至0.4,最好从0.15至0.35克/厘米3
本发明的吸收体结构适用于吸收性制品。这种吸收性制品通常由一个液体可渗透的体侧衬底和一个外覆盖层组成,而一种诸如本发明的吸收体结构,置于体侧衬垫和外覆盖层之间。通常,含第一主平面具有较低密度和强吸收材料浓度较高的纤维基体的第一个半厚度,最好放在比纤维基体另一半厚度更靠近液体可渗透的体侧衬垫的地方。也就是说,纤维基体中强吸收材料浓度最大和密度最低的部分,最好放在最靠近体侧衬垫的地方,并在使用时是最靠近穿戴者身体的地方。本申请人发现,本发明的强吸收性材料通常能将纤维基体中的水排到这样的程度,即,使含有较高浓度强吸收性材料的纤维基体表面,有比含有较低浓度强吸收性材料的纤维基体表面更干燥的感觉。显然,使用时最好将纤维基体较干燥的表面,放在最靠近穿戴者身体的地方。
当本发明的强吸收性材料以浓度大于30%用于纤维基体中时,通常,强吸收性材料最好具有描述于Byerley等人1992.6.26申请共同转让待审的美国专利申请系列07/906001中所希望的物理性质,其规格插入这里作为参考。具体而言,强吸收性材料最好有小于0.6毫米的载荷下变形量,和有10厘米的Wicking指数。或者,强吸收性材料可有Wieking参数为700或更大,或在0.6磅/吋2的载荷下至少有13克/克吸收能力。
参照各图,其中同样的数码代号代表同样的元件。图1表示了一次性使用的尿布10的透视图,该尿布10包括:一个液体可渗透的体侧衬垫12,一个外覆盖层14,一个置于体侧衬垫及外覆盖层之间的吸收体结构16。其体侧衬垫及外覆盖层的尺寸比吸收体结构要大些,且它们都有延伸超出吸收体结构16端部的端边部分18,体侧衬垫及外覆盖件还都有延伸超出吸收体结构16侧边的侧边部分20。典型地,体侧衬垫12及外覆盖层14是沿着边缘部分18及20互相固定的。
该尿布10整体上是沙漏形或工形的,它包括了一个靠近尿布中心的窄的叉裆部22以及在尿布各端的腰带部24,细长的弹性件26是固定于吸收体结构16两侧的邻近处,以产生收缩的弹性腿部适合于幼儿的腿。常规的压力敏感带28连接在一个腰带部24上,尿布10是以其体侧衬垫12紧贴幼儿的皮肤而固定在幼儿身上。一个腰带部围在幼儿腰的一部分而另一腰带部围在幼儿的其余腰部。这两个腰带部是靠压力敏感带重叠搭接连接在一起而使该尿布以合适的位置固定在幼儿身上。
采用常规的材料制作尿布10各部元件,体侧衬垫12可为任何软的、柔性的、多孔薄片(它可使液体在其间流通),并且例如亦可由一无纺纤维片或聚合纤维片(例如聚丙烯纤维)所组成。该体侧衬垫也可由高润湿强度的纸、纺粘细丝片或其它类似物组成。此外该衬垫亦可经表面活化剂处理以增强液体流通性。
外覆盖层14由液体不透层制成较合适,或者可以由塑料薄膜(例如聚乙烯、聚丙烯、聚氯乙烯及其它类似材料)制成,吸收体结构16由前述材料制造较合适,体侧衬垫12、外覆盖件14及吸收体结构16可以合适的方式相互连接而制成最终的尿布。这些件可以用热熔或压力敏感粘结剂的带或图形、全部地或图形式样地热密封、双面胶带、压力敏感粘结带或其它类似方法互相连结,特别有效的连结方式是在外覆盖层14的内表面上布置多条互相间隔且平行的热熔粘接线,该吸收体结构是沿各部分粘接线粘接在外覆盖层上,而体侧衬垫12是沿其它部分的粘接线亦即置于边缘部分18及20之内而又在吸收体结构16之外的那些部分粘接于外覆盖层14上。
图2是示于图1中的尿布沿线2-2的横剖面图,如图2所见,吸收体结构16包括一个含有强吸收材料颗粒30的整体成形的单个纤维片,如图2所示,吸收体结构16的半厚度“t”部分的强吸收材料颗粒30的浓度比在该纤维基体另一半厚度中的浓度更高些,而且吸收体结构16还包括薄纸包裹片32。紧挨着体侧衬垫12的纤维基体的半厚度内具有较高的强吸收材料颗粒浓度。从图2可见,强吸收材料颗粒的浓度沿着纤维基体的厚度逐渐减小,可以理解到,具有较高强吸收材料颗粒浓度的那一半厚度的纤维基体与另一半厚度的纤维基体相比会具有较低的平均密度。
图3至图5说明该纤维基体包含两个或更多的纤维层的情况,参照图3及图4,一次性使用的尿布10包括:一个体侧衬垫12、一个外覆盖层14、及一个放在体侧衬垫及外覆盖层14之间的吸收体结构16,该吸收体结构16包括一个第一纤维层34及一个第二纤维层36,从图3及图4中可见,该第一纤维层34沿着该产品长度方向的延伸要比第二纤维层36短,第一纤维层34的宽度基本上与第二纤维层相同而其长度仅覆盖了第二纤维层36的一部分。第一纤维层34的位置与第二纤维层36相比要更靠近体侧衬垫12,第一纤维层34包括一个含有强吸收材料的纤维基体。第一纤维层34与第二纤维层36相比具有较高的强吸收材料颗粒的浓度,而且第一纤维层34比第二纤维层36具有较低的平均密度及较大的单位重量。由于第一纤维层34的单位重量较大,所以包含第一纤维层34及第二纤维层36的纤维基体的半厚度就不会在第一及第二纤维层的交界处,而是在第一纤维层34的厚度内的某处。
图5说明了本发明的第三个实施例,其中的第一纤维层34包括一个放于尿布10目标区(液体排泄物在此开始积累)的小垫子。
已经制备了下述各种吸收体结构:
吸收体结构1,一种空气成网的混合物,其重量的65%是木浆绒(20%硬木及80%软木)及35%是强吸收材料(可从Hoechst-Celanese公司购得,商标登记号IM-3900),该吸收体结构的单位重量(绒及强吸收材料)为640克/平方米而密度为0.2克/立方厘米。该吸收体结构是切成工形,长为13.5英寸,纵向端头处的宽度为7英寸,叉裆处的宽度约2.5英寸。
吸收体结构2,该吸收体结构包括两个纤维层,第一层即上层(使用时靠近佩戴者体侧)是一种空气成网的木浆绒及强吸收材料的混合物,其中包括在吸收体结构1中采用的木浆绒的重量百分比为65%而强吸收材料的重量百分比为35%。该上层(即第一层)的单位重量为505克/平方米而密度为0.2克/立方厘米,该上层的形状是一种改进的T型,长为8.25英寸,前宽7英寸,背宽3.5英寸,叉裆宽2.5英寸。该上层布置在下层的长及宽内的中心。该下层包括在吸收体结构1中采用的空气成网的木浆绒及强吸收材料混合物,绒的重量百分比为65%而强吸收材料为35%。该下层的单位重量为360克/平方米而密度为0.2克/立方厘米,该下层的形状如同吸收体结构1那样为工形。
吸收体结构3,这一结构分为两层结构,且其材料与吸收体结构1及吸收体结构2的材料是一样的,这一结构的上层是空气成网的混合物,木浆绒占65%的重量百分比而强吸收材料占35%的重量百分比,该上层的单位重量为615克/平方米,密度为0.2克/立方厘米。下层亦是混合物,木浆绒占65%的重量百分比,强吸收材料占35%的重量百分比,该下层的单位重量为250克/平方米而密度为0.2克/立方厘米。该上层及下层的形状与吸收体结构2中上层及下层的形状相应地是一样的。
吸收体结构4,这一结构亦为两层结构,且其材料与吸收体结构1至3的材料是一样的,其上层包含65%重量百分比的木浆绒及35%重量百分比的强吸收材料,上层的单位重量为615克/平方米而密度为0.2克/立方厘米,下层包含75%重量百分比的木浆绒及25%重量百分比的强吸收材料,下层的单位重量为310克/平方米而密度为0.3克/立方厘米。该上层及下层的形状与吸收体结构2的上层及下层的形状相应地相同。
吸收体结构1及2的吸收能力约为400立方厘米,吸收体结构3的吸收能力约为370立方厘米,吸收体结构4的吸收能力约为385立方厘米。根据前述的各个吸收体结构可以理解,吸收体结构1、2及3不是按照本发明的吸收体结构而只是用作比较的。吸收体结构4是唯一按本发明的吸收体结构并且代表了一个较佳的实施例。
上述各吸收体结构是置于商标登记号为HUGGIES 一次性使用的尿布(中号)(Kimberly        Clark公司有售)的底框内进行试验的。具体说是将商售的HUGGIES一次使用的尿布中的体侧衬垫及吸收体结构除掉,上述吸收体结构1至4就插入到该尿布底框中以代替原来放在那里的吸收体结构,吸收体结构1至4是用双面粘胶带粘结于商售的尿布的外盖层上。然后把单位重量为50克/平方米的体侧衬垫按原来的体侧衬垫同样的方式放到该吸收体结构上。该体侧衬垫是一粘结的梳理的片,它是由每丝1.5英寸、1.8旦尼尔(denier)的双组分纤维制成的,该双组分纤维的内芯是聚丙烯而外皮是聚乙烯。然后对该尿布进行强迫泄漏试验。
具体说将每件尿布戴在一个柔性幼儿模型(其尺寸近似地适用于中号尿布)上,该柔性幼儿模型可以在某位置对尿布的体侧衬垫泄放液体,通常该位置是在尿布宽度的中心且约在尿布前腰带部的下方5英寸(当尿布戴在模型上时),含0.9%重量百分比的氯化钠水溶液通过置于幼儿模型内部的喷咀以15立方厘米/秒的速率排出。初始供入氯化钠水溶液是60毫升,之后每10分钟供30毫升,该柔性幼儿模型是气动操纵以在强迫泄漏试验期间模拟在一定空间间距下的腿部运动。在所试尿布的周边周围安排了多个湿度检测感头,以指示泄漏出现的时间,一旦检测到泄漏,就停止试验并记录下直到泄漏出现时氯化钠水溶液的全部供入量,这项试验的结果列于表1,所列结果是各吸收体结构三次试验的平均值,并且给出了该三次试验的标准偏差(均方根差)。
表        1
吸收体结构        达到泄漏时的总供入量        标准偏差
(毫升)
1*201 17.4
2*242 0.6
3*274 1.5
4        293        17.7
*        号表示这些吸收体结构不是本发明的样品
从表1可见,本发明生产制作的尿布具有较好的性能(强迫泄漏试验结果)。
参照专门的实施例对本发明已经作了详细的说明。与之同时,可以理解到,对本专业熟悉的人员根据上述说明并理解后是很容易想出各种有关这些实施例的更改、改变或等同体。因此本发明的范围应该是由所附的权要求书及任何相当的内容来评估确定。

Claims (30)

1、一种吸收体结构,此吸收体结构包括:具有第一主平面、对置的第二主平面和隔开第一和第二主平面一定厚度的纤维基体,此纤维基体含有强吸收性材料,此纤维基体的特征为:含有第一主平面的纤维基体厚度的第一个一半,与含第二主平面的纤维基体厚度的第二个一半相比,其强吸收性材料的浓度较大,而其平均密度较低。
2、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第一个一半,包括其重量百分比约为20%至95%的强吸收性材料。
3、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第一个一半的密度约为0.01至0.2克/厘米3
4、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第二个一半包括其重量百分比约为5%至50%的强吸收性材料。
5、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第二个一半的密度约为0.1至0.4克/厘米3
6、按照权利要求2所述之吸收体结构,其特征为:纤维基体厚度的第一个一半包括重量百分比约为20%至50%的强吸收性材料。
7、按照权利要求3所述之吸收体结构,其特征为:纤维基体厚度的第一个一半的密度约为0.05至0.2克/厘米3
8、按照权利要求4所述之吸收体结构,其特征为:纤维基体厚度的第二个一半包括重量百分比约为5%至35%的强吸收材料。
9、按照权利要求5所述之吸收体结构,其特征为:纤维基体厚度的第二个一半的密度约为0.15至0.35克/厘米3
10、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第一个一半包括重量百分比约为20%至95%的强吸收性材料,其密度约为0.01至0.2克/厘米3;纤维基体厚度的第二个一半包括重量百分比约为5%至50%的强吸收性材料,其密度约为0.1至0.4克/厘米3
11、按照权利要求1所述之吸收体结构,其特征为:纤维基体厚度的第一个一半包括重量百分比约为20%至50%的强吸收性材料,其密度约为0.05至0.2克/厘米3;纤维基体厚度的第二个一半包括重量百分比约为5%至35%的强吸收性材料,其密度约为0.15至0.35克/厘米3
12、按照权利要求1所述之吸收体结构,其特征为:纤维基体由含有强吸收性材料的独立构成的第一和第二纤维层组成,包括第一主平面的第一纤维层,有比包括第二主平面的第二纤维层较低的平均密度和较高浓度的强吸收性材料。
13、按照权利要求12所述之吸收体结构,其特征为:第一纤维层含有重量百分比为20%至95%的强吸收性材料,而第二纤维层含有重量百分比为5%至50%的强吸收性材料。
14、按照权利要求13所述之吸收体结构,其特征为:第一纤维层的密度约为0.01至0.2克/厘米3;第二纤维层的密度约为0.1至0.4克/厘米3;
15、按照权利要求13所述之吸收体结构,其特征为:强吸收性材料基本均匀地散布在第一和第二纤维层中。
16、按照权利要求12所述之吸收体结构,其特征为:第一纤维层的单位重量约为150至1500克/米2,第二纤维层的单位重量约为100至1250克/米2,第一纤维层的单位重量大于第二纤维层的单位重量。
17、按照权利要求1所述之吸收体结构,其特征为:纤维基体是含有强吸收性材料的整体构成的单层。
18、按照权利要求17述之吸收体结构,其特征为:强吸收性材料的浓度以非分级的方式从第一主平面向第二主平面减小。
19、一种吸收性制品,此制品包括:一个外覆盖层;一个可渗透液体的体侧衬垫;以及一个装在上述外覆盖层和体侧衬垫之间的吸收体结构,此吸收体结构包括具有第一主平面、第二主平面、以及隔开第一和第二主平面一定厚度的纤维基体,纤维基体含有强吸收性材料,此纤维基体的特征为:含有第一主平面的纤维基体厚度的第一个一半,与含有第二主平面的纤维基体厚度的第二个一半相比,其强吸收材料的浓度较大,而其平均密度较低。
20、按照权利要求19所述之吸收性制品,其特征为:第一主平面比第二主平面更靠近体侧衬垫。
21、按照权利要求20所述之吸收性制品,其特征为:纤维基体厚度的第一个一半包括其重量百分比约为20%至95%的强吸收材料;纤维基体厚度的第二个一半包括其重量百分比约为5%至50%的强吸收材料。
22、按照权利要求20所述之吸收性制品,其特征为:纤维基体厚度的第一个一半,其密度约为0.01至0.2克/厘米3;纤维基体厚度的第二个一半,其密度约为0.1至0.4克/厘米3
23、按照权利要求20所述之吸收性制品,其特征为:纤维基体厚度的第一个一半包括其重量百分比约为20%至50%的强吸收材料;纤维基体厚度的第二个一半包括其重量百分比约为5%至35%的强吸收材料。
24、按照权利要求20所述之吸收性制品,其特征为:纤维基体厚度的第一个一半,其密度约为0.05至0.2克/厘米3;纤维基体厚度的第二个一半,其密度约为0.15至0.35克/厘米3
25、按照权利要求20所述之吸收性制品,其特征为:纤维基体由含有强吸收材料独立构成的第一和第二纤维层组成,包括第一主平面的第一纤维层,有比包括第二主平面的第二纤维层较低的平均密度和较高浓度的强吸收材料。
26、按照权利要求25所述之吸收性制品,其特征为:第一纤维层含有其重量百分比约为20%至95%的强吸收材料;第二纤维层含有其重量百分比约为5%至50%的强吸收性材料。
27、按照权利要求25所述之吸收性制品,其特征为:第一纤维层的密度约为0.01至0.2克/厘米3;第二纤维层的密度约为0.1至0.4克/厘米3
28、按照权利要求25所述之吸收性制品,其特征为:强吸收性材料基本均匀地散布在第一和第二纤维层中。
29、按照权利要求20所述之吸收性制品,其特征为:纤维基体是含有强吸收材料的整体构成的单层。
30、按照权利要求28所述之吸收性制品,其特征为:强吸收材料的浓度以非分级的方式,从第一主平面向第一主平面减小。
CN93114745A 1992-11-30 1993-11-29 由具有双重z向梯度的纤维基体组成的吸收体结构 Pending CN1088078A (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108024886A (zh) * 2015-09-30 2018-05-11 大王制纸株式会社 吸收性物品及其制造方法
CN108024886B (zh) * 2015-09-30 2021-07-06 大王制纸株式会社 吸收性物品及其制造方法
CN106264891A (zh) * 2016-10-27 2017-01-04 佛山市豪利家卫生用品有限公司 一种纸尿裤复式芯体吸收结构
CN112286255A (zh) * 2020-09-29 2021-01-29 北京空间飞行器总体设计部 高稳定度测控温系统在轨噪声评价方法

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KR940010980A (ko) 1994-06-20
MX9302362A (es) 1994-05-31
US5356403A (en) 1994-10-18
AU5200693A (en) 1994-06-09
BR9304732A (pt) 1994-06-07
SA93130511B1 (ar) 2005-05-10
ZA937481B (en) 1994-04-26
CA2090796A1 (en) 1994-05-31
EP0600454A1 (en) 1994-06-08
JPH06205806A (ja) 1994-07-26
AU668607B2 (en) 1996-05-09
KR100253643B1 (ko) 2000-04-15

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