METHOD FOR PRODUCING AROMATIC POLYAMIDE POROUS FILM, POROUS FILM OBTAINED BY THE METHOD, AND BATTERY SEPARATOR USING THE AROMATIC POLYAMIDE POROUS FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a porous film comprising aromatic polyamide as a structural component, which can be thinned, has high air permeability, and further has excellent mechanical properties, heat resistance and oxidation resistance.SOLUTION: The aromatic polyamide porous film is obtained by performing solution film formation using a film formation undiluted solution comprising a metal salt of 0.7 to 7.5 mol based on 100 mol of the amide group of aromatic polyamide.