abstract |
It is a polyolefin microporous membrane obtained by forming a gel-like molded product using a polyolefin resin containing polypropylene, and stretching and washing it in at least one direction, and has an electrolyte solution injection property of 20 seconds or less, A polyolefin microporous membrane having a uniform polypropylene distribution in at least one plane perpendicular to the thickness direction, and a method for producing the same. Provided is a polyolefin microporous membrane excellent in oxidation resistance, mechanical properties and permeability. |