CN1033618C - 用于吸收体液的制品 - Google Patents

用于吸收体液的制品 Download PDF

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Publication number
CN1033618C
CN1033618C CN93101269A CN93101269A CN1033618C CN 1033618 C CN1033618 C CN 1033618C CN 93101269 A CN93101269 A CN 93101269A CN 93101269 A CN93101269 A CN 93101269A CN 1033618 C CN1033618 C CN 1033618C
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Prior art keywords
body fluid
egative film
liquid
goods
backsheet
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Expired - Lifetime
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CN93101269A
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CN1076853A (zh
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曾我洋行
松下美智代
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Unita Corp
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Unita Corp
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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

本发明涉及一种用于吸收液体的制品，它由一吸收材料层和一不渗液体的底片组成，所述底片1由含有其重量的30%至80%的嵌入的无机充填颗粒的聚烯烃塑料薄膜先经延展然后加以热压制成。该底片1的至少一个表面是由一个粗糙表面区5和一个光滑表面区6所组成以使这两种表面区域一起在衬片上形成所需的表面图案。该粗糙表面区5有提供可透气性的微孔7而该光滑表面区便于通过它看到体液吸收制品的吸液芯体是否已被沾污的情况。

Description

用于吸收体液的制品
本发明涉及用于吸收体液的制品如一次性使用的尿布及妇女卫生巾等的聚烯烃类塑料薄膜制成的可透气而不渗液的底片。
使用诸如聚乙烯之类的聚烯烃类塑料薄膜作为复盖体液吸收制品中的吸收芯体的不渗透液体的薄膜是众所周知的。使用制成透明或半透明的聚乙烯薄膜，可以透过薄膜而看出吸液芯体已否沾有体液并且使用这种薄膜可方便地确定沾有体液的吸收制品是否需要更换新的。然而，已有技术的这种薄膜的透气性相当差，因此使用底片的体液吸收制品就会变得密不透气。大家还熟知，为了形成可透气的细小孔隙把包含诸如碳化钙无机充填细颗粒的诸如聚乙烯薄膜之类的聚烯烃类塑料薄膜按所要求的延展比加以延展，以把这种薄膜用作一种可透气而不渗液的底片，例如在日本专利申请公开公报上发表的号码为1985-199037及1987-167332的专利申请就揭示了这类底片。这些已有技术由于改善了透气性，因此在使用过程中确实可方便地防止体液吸收制品变成闷不通气。然而，虽然现有技术的这种薄膜在延伸处理前具有一定的透明度，但是一旦延伸之后，充填颗粒就容易上升到表面成为微突，这种微突使薄膜表面变得粗糙并由此而增大了光学上的漫反射。结果，薄膜的透明度就丧失，使用者就难以辨认出吸液芯体是否已经沾上了体液。
为了解决这些问题，本发明的主要目的是提供一种具有所要求的透明度、透气性以及适用作体液吸收的制品，它含有一底片，这种底片是将含有无机充填颗粒且其表面因延展而变得粗糙的聚烯烃类塑料薄膜加以热压处理使之形成部分透明和部分光滑的表面而制成的。
为实现上述的目的，本发明的体液吸收制品包括一吸收材料层和一可透气而不渗液的底片来达到的，所述的底片包括含有30％至80％重量的无机充填颗粒的延展成的聚烯烃类塑料薄膜，所述底片至少有一个含有大量可透气细孔及由所述颗粒上升形成的大量的微突的粗糙部分和由基本没有所述微突的比较光滑的热压表面组成并具有比所述至少一个粗糙部分透明度高的其余部分。
所述的粗糙部分最好和所述的光滑表面区域一起形成一个在所述底片之上所需要的表面图案。
根据本发明，所述的可透气而不渗液的底片是由含有无机充填颗粒的聚烯烃塑料薄膜加以延展制成以使薄膜表面可在透气微孔形成期间因充填的颗粒上升到表面而变成粗糙表面。然后对此表面变粗糙的薄膜进行热压，在热压过程中，该薄膜的一部分与一压辊接触的薄膜在压力下软化或熔化从而使粗糙表面变成光滑表面。该压辊上可做成所需要的图案以获得相应的、由光滑表面区及粗糙表面区组成的薄膜表面图案。把具有这种图案的表面的薄膜用作复盖体液吸收用具的吸液芯体，一方面由于该光滑表面区域有充分的透明度因此能便于看出吸液芯体是否已沾上体液的情况，而另一方面，粗糙表面区域由于光的漫散射而透明度较差难以看清从而使沾有体液的吸液芯体能有效地为粗糙表面区域所遮住。即使在热压后，这种薄膜至少在该粗糙表面区仍保持着可透气的微孔。
现参照附图更详细地对本发明进行描述，其中：
图1是一采用本发明衬片的一种一次性使用尿巾的立视图；
图2示出了表面图案例子(a)及(b)的局部放大视图；以及
图3是一说明制作该底片加工方法的流程图。
图1是部分剖示的、处于实际使用时直立状态的一次性使用尿布2的透视图，所述的尿布2中包括一本发明的表面上具有图案的可透气底片1。和已有技术一样，该尿布2主要由一上片3，底片1和夹于片1、3之间的吸液芯体4组成。该片1形成了该尿布的外侧面，它具有阻止体液泄漏的足够的液体不渗透性。
图2是一以放大比例方式表示的本发明的底片1的局部透视图，图中示出了底片1的不同表面图案的两个实例(a)和(b)。该底片1是一50微米厚的、包含30至80％重量的诸如碳化钙或硫酸钡的无机充填颗粒的聚乙烯薄膜。
该底片1至少有一个粗糙表面区5和一相对光滑的表面区6，例如该两区域可具有一如图2(a)所示的条状图案或如图2(b)所示的圆点图案。该粗糙表面区5包括大量的直径为0.03至5微米的微孔7以及大量的由充填颗粒升起而形成的微突8。这些微孔的存在使粗糙表面5可透气但仍保持了区域5的液体不透性，而这些微突8的存在，由于透射光及反射光的漫反射而使该区域5变成白色。另一方面，该光滑表面区6之上实际上不存在微突8，即使有微突的话，它们也都低于粗糙表面区5的微突8，使透射光及反射光的光的漫散射减小，因此可确保获得一个高于粗糙表面区5的透明度。该光滑表面区6可以有或没有所述的微孔7。
当底片处于如图1所示的实际使用时的直立状态时，能容易地看到排泄的发生由此可判断更换尿布2的时机，这是因为通过该光滑表面区6可看到沾有体液的吸液芯体。另一方面，通过粗糙表面区5却很难看到沾脏的吸液芯体，因此可用该粗糙表面区5掩盖沾脏污的吸液芯体4。为此达此目的，可以适当地选择粗糙表面区5的位置及尺寸大小。为了获得所需要的底片1的表面图案，也可分别适当地选择该粗糙表面区5和光滑表面区6的形状及其面积比。应该理解的是，为了清楚地表示它们的情况，图2中微孔7和微突8的尺寸相对于衬片的厚度是以夸大的方式表示的。
图3中示出一种制造底片1的加工方法的流程图。厚度约为20微米、含有30至80％重量的如碳化钙和硫酸钡的无机充填颗粒的聚烯烃薄膜100被进给到一个拉幅机101，在加热条件下由它将薄膜100在长度及宽度上都延展100％，然后冷却以获得含有可透气细孔7及正反表面都粗糙的延伸薄膜102。该延伸薄膜102被传送到一对辊筒103之间，其中一个辊筒是具有如图2(a)所示的条状的图案的辊筒，另一个是具有光滑表面的辊筒，由此使粗糙表面在一适当压力下加热部分地变成光滑从而形成具有粗糙表面区和该光滑表面区的表面图案的可透气的薄膜104。然后薄膜104被适当地切断以获得一块块底片1。
当用于供一次性使用的尿布时，底片1的厚度最好是20-80微米。底片1内的无机充填颗粒含量可加以选择和调整以获得所需的透气性和透明度，即通过它可以看得见吸液的芯体。
本发明的底片1可通过在粗糙表面区上的微孔而获得透气性，该粗糙表面区还能有效地遮住吸收了排泄出的体液因而被沾污的吸液芯体，由此使体液吸收保持一个可接受的外观。该光滑表面区可让使用者判断用新的体液吸收制品更换已沾有体液的吸收制品的时刻，这是因为该光滑表面区有一个可方便地观察到已被沾污的吸液芯7体的透明性。粗糙和光滑表面区可适当地安排以在底片上呈现所需的表面图案。这种底片可用对含有无机充填颗粒的聚烯烃类塑料薄膜延展及随后对这种延展薄膜进行热压的方法很容易地制得。

Claims (3)

1.一种用于吸收体液的制品，所述制品包括一吸收材料层和一不渗液体的底片，所述底体由含有其重量的30％至80％的被嵌入的无机充填颗粒的一种延展成的聚烯烃塑料制成，所述底片有至少一个含有大量可透气细孔和大量的通过所述充填颗粒的上升所形成的微突的粗糙部分和由基本没有所述微突的比较光滑的热压表面组成并具有比所述至少一个粗糙部分透明度高的其余部分。
2.如权利要求1所述的制品，其特征在于，所述的至少一个粗糙的部分和所述比较光滑的表面一起形成在所述底片之上的一个所需要的表面图案。
3.如权利要求1或2所述的制品，其特征在于，所述的比较光滑的表面还设有可透气的细孔。
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