发明授权
- 专利标题： Ethylene-vinyl alcohol membranes having improved properties and a method of producing the same
- 专利标题（中）： 具有改进性能的乙烯 - 乙烯醇膜及其制备方法
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申请号： US962962申请日： 1978-11-22
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公开(公告)号： US4220543A公开(公告)日： 1980-09-02
- 发明人: Shuzo Yamashita
- 申请人： Shuzo Yamashita
- 申请人地址： JPX Kurashiki
- 专利权人： Kuraray Co., Ltd.
- 当前专利权人： Kuraray Co., Ltd.
- 当前专利权人地址： JPX Kurashiki
- 优先权： JPX52/108251 19770906
- 主分类号： D01F6/34
- IPC分类号： D01F6/34 ; A61L27/00 ; A61M1/18 ; B01D67/00 ; B01D69/02 ; B01D71/38 ; B01D71/78 ; B01D71/80 ; B29D27/04
摘要：
A membrane made of a composition containing essentially two kinds of ethylene-vinyl alcohol copolymers with different ethylene unit contents and the membrane has such a microstructure that there are at least one active layer and a porous layer thereunder, the porous layer comprises mono- or multi-layer of a plurality of cylindrical voids and a plurality of spherical voids therein and the membrane is of a porosity of 70 to 95%.
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