POLYOLEFIN MICROPOROUS MEMBRANE

摘要

Disclosed is a polyolefin microporous membrane having a bubble point of not more than 1 MPa, a tensile strength in the longitudinal direction of not less than 50 MPa, a tensile strength in the width direction of not less than 50 MPa, and a thermal shrinkage in the width direction at 130°C of not more than 20%. This polyolefin microporous membrane is excellent in strength and low thermal shrinkage property, while having a large pore diameter.