公开(公告)号：US4818600A

公开(公告)日：1989-04-04

申请号：US130778

申请日：1987-12-09

Applicant: Ralph V. Braun ,  Christine H. Brown ,  Steven W. Fitting ,  Lance J. Garrett, Jr. ,  David C. Law ,  Robert E. Weber

Inventor： Ralph V. Braun ,  Christine H. Brown ,  Steven W. Fitting ,  Lance J. Garrett, Jr. ,  David C. Law ,  Robert E. Weber

IPC: A61F13/15 ,  B32B5/18 ,  D04H1/56 ,  D06N3/00 ,  D06N3/04 ,  D06N7/00 ,  B32B27/00

CPC classification number: A61F13/5148 ,  A61F13/141 ,  A61F13/51405 ,  A61F13/5146 ,  B32B5/18 ,  D04H1/56 ,  D06N3/0002 ,  D06N3/04 ,  D06N7/00 ,  A61F2013/15016 ,  D06N2205/023 ,  D06N2209/123 ,  Y10T428/263 ,  Y10T442/2139 ,  Y10T442/2918 ,  Y10T442/68

Abstract: A breathable barrier which includes:A. a first layer which is a porous sheet having a first side and a second side; andB. a second layer joined to the first side of the first layer, which second layer is a continuous film of a polymeric latex material, in which:the film is not microporous in that it is substantially free of voids which connect the two surfaces of the film; andthe film has an average thickness of from about 10 to about 250 microns;wherein the first layer side of the second layer is intimately comingled with at least some of the fibers at the surface of the first side of the first layer, none of the pores at the surface of the first side of the first layer are so large as to significantly adversely affect the barrier properties of the breathable barrier as a consequence of the comingling, and the breathable barrier has a water vapor transmission rate at 37.degree. C. and about 50 percent relative humidity of from about 100 to about 2,200 g/m.sup.2 /24 hours and is impermeable to 0.9 percent by weight saline solution at about 21.degree. C. for a period of at least about one hour at a hydrostatic head of at least about 11.4 cm.In place of a coating, the continuous film can be a preformed film of a water-soluble polymeric material which is laminated to the porous sheet. In preferred embodiments, the porous sheet is a meltblown nonwoven web. The disclosed breathable barrier is especially useful as outer covers and baffles in such disposable absorbent articles as diapers, sanitary napkins, and incontinent pads. The breathable barrier also can be used in more durable or protective type applications including garments such as rainwear.

Abstract translation: 一种透气屏障，包括：A.第一层，其是具有第一侧和第二侧的多孔片; 和B.连接到第一层的第一侧的第二层，该第二层是聚合物胶乳材料的连续膜，其中：该膜不是微孔的，因为它基本上不含连接两个表面的空隙 的电影; 并且该膜具有约10至约250微米的平均厚度; 其中第二层的第一层侧在第一层的第一面的表面处与至少一些纤维紧密地相连，第一层的第一面的表面上的孔都不大于 从而显着地不利地影响透气屏障的阻挡性能，并且透气屏障在37℃和约50％相对湿度下具有约100至约2,200g / m 2 / 24小时，并且在约21℃的0.9重量％盐水溶液中不渗透至少约11.4厘米的静水压头至少约1小时的时间。 代替涂层，连续膜可以是层压到多孔片材上的水溶性聚合物材料的预成型膜。 在优选的实施方案中，多孔片是熔喷非织造纤维网。 所公开的透气屏障特别适用于诸如尿布，卫生巾和失禁垫的这种一次性吸收制品中的外盖和挡板。 透气屏障也可用于更耐用或保护型应用，包括雨衣等服装。