| abstract |
A polyolefin microporous film, which is obtained by forming a gel-like molded product using a polyolefin resin that contains a polypropylene, stretching the gel-like molded product in at least one direction, and cleaning the stretched product, and which is characterized in that the electrolyte solution pourability is 20 seconds or less and the polypropylene distribution is uniform in at least one plane that is perpendicular to the thickness direction; and a method for producing the polyolefin microporous film.nProvided is a polyolefin microporous film which has excellent oxidation resistance, mechanical characteristics and permeability. |