PROCESS FOR PRODUCING MICROPOROUS POLYOLEFIN FILM AND MICROPOROUS POLYOLEFIN FILM

摘要

The microporous polyolefin film produced by drawing a gel molding containing a polyolefin and a solvent for film formation in at least a uniaxial direction, removing the solvent for film formation and once more drawing the molding at a rate of >= 3 %/sec in at least a uniaxial direction at temperature of <= polyolefin crystal dispersion temperature + 20°C is excellent in compression resistance.