发明名称 |
Porous film, process for producing the same, and use of the same |
摘要 |
<p>A porous film, a process for producing the same, a battery separator comprising the porous film, and a battery having incorporated therein the separator are disclosed. The porous film comprises a polyethylene and a polypropylene as the essential components, wherein the polyethylene content in the total weight of polyethylene and polypropylene is from 2 to 40% by weight and the polyethylene content is changed in the direction of the thickness of the film, and is produced by forming a laminate film comprising at least one polypropylene layer and at least one layer of a mixture of polyethylene and polypropylene as the essential components, the polyethylene content in the film being from 2 to 40% by weight, uniaxially stretching the laminate film at a low-temperature range of from -20 DEG C to 80 DEG C and then stretching the film at a high-temperature range of from 90 DEG C to 150 DEG C. <IMAGE></p> |
申请公布号 |
EP0668156(B1) |
申请公布日期 |
1997.05.14 |
申请号 |
EP19950101086 |
申请日期 |
1995.01.26 |
申请人 |
NITTO DENKO CORPORATION |
发明人 |
NISHIYAMA, SOJI;HIGUCHI, HIROYUKI;MATSUSHITA, KIICHIRO;MATSUSHIMA, RYOICHI |
分类号 |
C08J9/00;B32B5/18;B32B27/32;B32B27/36;H01M2/16;H01M10/05;H01M10/0566;(IPC1-7):B32B27/32;C08J5/18 |
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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