发明名称 |
Oriented porous polypropylene films |
摘要 |
This invention relates to oriented porous films having cells with polygonal cross sections and average pore diameters of about 5 to about 30 microns and interconnecting pores between the cells which have a diameter of about 0.2 to about 20 microns which are formed from a polypropylene-based resin and a process for forming the film which comprises the steps of forming a film containing beta-spherulites, selectively extracting a portion of the beta-spherulites to form a porous film and stretching the porous film in at least one direction to form the oriented polymeric porous film.
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申请公布号 |
US4975469(A) |
申请公布日期 |
1990.12.04 |
申请号 |
US19890325680 |
申请日期 |
1989.03.20 |
申请人 |
AMOCO CORPORATION |
发明人 |
JACOBY, PHILIP;BAUER, CHARLES W. |
分类号 |
C08J9/00;A01G9/14;A01G13/02;B29C55/00;C08J5/18;C08J9/26 |
主分类号 |
C08J9/00 |
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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