发明名称 |
Process for the manufacture of asymmetric, porous membranes, and product thereof |
摘要 |
A process for the production of asymmetric, porous membranes is disclosed which comprises extruding liquified polymer in tubular form and while expanding said film during processing, subjecting it to conditions such that the inside and outside surfaces of the film receive distinct treatments.
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申请公布号 |
US4865785(A) |
申请公布日期 |
1989.09.12 |
申请号 |
US19860842740 |
申请日期 |
1986.03.24 |
申请人 |
AMERICAN CYANAMID COMPANY |
发明人 |
ZWICK, MAURICE M. |
分类号 |
B01D67/00;B01D69/06;B01D69/08;B29C47/00;B29C67/20 |
主分类号 |
B01D67/00 |
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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