Original document(39 pages) Authorized document(40 pages) 中文版
    Breathable microporous films (12) are provided having controlled regional breathability with thick high WVTR regions (24, 29) and thinner low WVTR regions (26, 27). 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 (18, 19, 20) with one of the rolls (18, 19) having a raised surface area (22, 23) or by applying a focused stream of hot air (110). Monolayer microporous films and multilayer films having at least one microporous layer can be treated to impart zoned breathability to the film.
Application Number
申请号
98812375 Application Date
申请日
1998.12.17
Title 名称 Microporous films having zoned breathability
Publication Number
公开号
1282289 Publication Date
公开日
2001.01.31
Approval Pub. Date 2004.07.21 Granted Pub. Date 2004.07.21
International Classification 分类号 B29C59/04;B32B27/12;D04H13/00
Applicant(s) Name
申请人
Kimberly-clark worldwide Inc.
Address 地址
Inventor(s) Name 发明人 S.M. Campbell;H.M. Welch;L.N. Barnett jr.
Attorney & Agent 代理人 cui yaobeng

  
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