发明名称 |
Microporous polyolefin membrane and method of production thereof. |
摘要 |
<p>A microporous polyolefin membrane formed from a polyolefin composition, said composition having a weight-average molecular weight/number-average molecular weight ratio of 10-300 and comprising 1 weight % or more of an ultra-high molecular weight polyolefin having a weight-average molecular weight of 7 x 10<5>, said microporous membrane having a thickness of 0.1-25 mu m, a porosity of 35-95%, an average pore diameter of 0.001-0.2 mu m and a breaking strength of 0.2 kg or more per 15 mm width is produced by (a) preparing a solution comprising 10-50 weight % of the polyolefin composition and 50-90 weight % of a solvent; (b) extruding the solution through a die; (c) cooling the extruded solution to form a gel-like mass; (d) stretching the gel-like mass at a temperature equal to or lower than the melting point of the polyolefin composition plus 10 DEG C; and (e) removing any remaining solvent.</p> |
申请公布号 |
EP0476198(B1) |
申请公布日期 |
1994.07.20 |
申请号 |
EP19900310331 |
申请日期 |
1990.09.20 |
申请人 |
TONEN CORPORATION |
发明人 |
TAKITA, KOTARO, C/O CORP. RESEARCH AND DEV. LAB.;KONO, KOICHI, C/O CORP. RESEARCH AND DEV. LAB.;TAKASHIMA, TATSUYA, CORP. RESEARCH AND DEV. LAB.;OKAMOTA, KENKICHI, CORP. RESEARCH AND DEV. LAB. |
分类号 |
B01D71/26;B29C55/00;C08J9/00;C08L23/00;C08L23/02;C08L23/06;H01M2/16;(IPC1-7):B01D71/26;B01D67/00 |
主分类号 |
B01D71/26 |
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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