发明名称 |
CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AND FILTRATION FILTER |
摘要 |
The present invention provides a method for producing a crystalline polymer microporous membrane, which includes asymmetrically heating a film composed of crystalline polymer and being fixed, by a heating unit at a temperature equal to or higher than the melting point of a burned product of the crystalline polymer, so that one surface of the film is heated while being in contact with the heating unit, so as to form a semi-burned film having a temperature gradient in a thickness direction of the film composed of crystalline polymer; and stretching the semi-burned film.
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申请公布号 |
US2011272345(A1) |
申请公布日期 |
2011.11.10 |
申请号 |
US200913144994 |
申请日期 |
2009.12.17 |
申请人 |
FUJIFILM CORPORATION |
发明人 |
HOKAZONO HIROHISA;MIYAMOTO KIMIAKI |
分类号 |
B01D63/00;B29C51/42;B32B3/26 |
主分类号 |
B01D63/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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