| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous film which has assembling malfunction and is excellent on long-term stability and can show outstanding characteristics when using as a separator. Ž<P>SOLUTION: In the porous laminated film, a plurality of porous films with thickness of ≤20 μm are laminated, and a thickness ratio per one layer is 0.3-0.7 to the whole layers. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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