METHOD FOR PRODUCING HEAT-RESISTANT SYNTHETIC RESIN MICROPOROUS FILM, HEAT-RESISTANT SYNTHETIC RESIN MICROPOROUS FILM, SEPARATOR FOR NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a heat-resistant synthetic resin microporous film which is excellent in both of permeability of ions such as a lithium ion and heat resistance and hardly causes pollution of a production line, and to provide a method for producing the heat-resistant synthetic resin microporous film.SOLUTION: The method for producing the heat-resistant synthetic resin microporous film comprises the steps of: applying a polymerizable compound having two or more radically-polymerizable functional groups in one molecule thereof to the surface of a synthetic resin microporous film; and performing remote type plasma treatment on the synthetic resin microporous film. According to this production method, the heat-resistant synthetic resin microporous film, the heat resistance of which is improved without deteriorating the permeability of ions such as the lithium ion, can be produced.SELECTED DRAWING: Figure 1