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公开(公告)号:US06277479B1
公开(公告)日:2001-08-21
申请号:US09164026
申请日:1998-09-30
申请人: Stephen Michael Campbell , Howard Martin Welch , Larry Ned Barnett, Jr. , Carol Ann Blaney , David Arthur Fell , Sarah Jane Marie Freiburger , William Bela Haffner , Marianne Keevill Leick , Ann Louise McCormack , Douglas H. Tulley, Jr.
发明人: Stephen Michael Campbell , Howard Martin Welch , Larry Ned Barnett, Jr. , Carol Ann Blaney , David Arthur Fell , Sarah Jane Marie Freiburger , William Bela Haffner , Marianne Keevill Leick , Ann Louise McCormack , Douglas H. Tulley, Jr.
IPC分类号: B32B326
CPC分类号: A61F13/51484 , A61F13/15203 , A61F13/15731 , A61F13/51462 , B29C35/045 , B29C59/04 , B29C59/08 , B29K2105/041 , B29K2995/0065 , B29K2995/0069 , B32B27/06 , B32B27/12 , Y10S428/913 , Y10T428/2495 , Y10T428/24992 , Y10T428/249979 , Y10T428/249981 , Y10T428/249992 , Y10T442/647
摘要: Breathable microporous films are provided having controlled regional breathability with thick high WVTR regions and thinner low WVTR regions. The zoned breathable microporous films can be made by selectively applying heat and/or pressure to specific regions the microporous film such as by feeding a microporous film through a pair of heated nip rollers with one of the rolls having a raised surface area or by applying a focused stream of hot air. Monolayer microporous films and multilayer films having at least one microporous layer can be treated to impart zoned breathability to the film.
摘要翻译: 提供透气微孔膜,其具有受控的区域透气性,具有厚的高WVTR区域和较薄的低WVTR区域。 可以通过选择性地向微孔膜的特定区域施加热和/或压力来制备分区的透气微孔膜,例如通过将一个微孔膜馈送通过一对加热的夹持辊,其中一个辊具有凸起的表面积,或者通过施加 专注的热空气流。 可以对具有至少一个微孔层的单层微孔膜和多层膜进行处理以赋予膜分隔的透气性。