Patent ID: 6168858
Filing Date: 2001-01-02
Classification: H01M,Y02E,Y10S,Y10T

Abstract:
A polyethylene microporous film which is composed of a linear copolymeric polyethylene having a melt index (MI) of less than 0.1, and a propylene unit content of 0.1 to 4 mol %, wherein the polyethylene microporous film has a fuse temperature of less than 136.degree. C., a thickness of 1 to 500 .mu.m, a porosity of 20 to 80%, a pore diameter of 0.001 to 0.3 .mu.m a sticking strength of 450 to 760 g/25 .mu. and a gas transmission rate of 10 to 6,000 sec.