| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly heat-resistant polyolefin membrane incorporated with a small amount of a filler, and to provide a porous polyolefin membrane produced by making said membrane porous. SOLUTION: The polyolefin membrane contains 1-30 wt.% of one or more kinds of particles selected from particles≤100 nm in mean size and laminar mineral particles. The porous polyolefin membrane is produced by exposing the above membrane to a solvent for polyolefin to swell the membrane followed by extracting and removing the solvent to make the membrane porous. COPYRIGHT: (C)2004,JPO
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