| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separator more superior in reliability than a conventional polyolefin-made micro porous resin membrane, and capable of improving safety of a battery at a low price. Ž<P>SOLUTION: Polytetrafluoroethylene is dispersed in the micro porous resin membrane having polyolefin as the body. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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