POLYOLEFIN-BASED RESIN COMPOSITION, METHOD FOR PRODUCING POROUS FILM BY USING THE COMPOSITION, POROUS FILM, METHOD FOR PRODUCING LAMINATED POROUS FILM, LAMINATED POROUS FILM, AND SEPARATOR FOR BATTERY

摘要

PPROBLEM TO BE SOLVED: To provide a polyolefin-based resin composition obtaining a porous film in which a thin portion is extreamely small, and to provide a method for producing a porous film by using the composition, a porous film and a laminated porous film obtained by the method, and a separator for a battery using the porous film or the laminated porous film. PSOLUTION: The polyolefin-based resin composition contains a polyolefin-based resin (A) and a micropore-forming agent (B), wherein the micropore-forming agent is subjected to a surface treatment with a surface treating agent containing a monovalent metal salt (b) of 10C-22C saturated fatty acid, and contains 2 to 6 pts.wt. of the monovalent metal salt (b) of 10C-22C saturated fatty acid in 100 pts.wt. of the micropore-forming agent (B). PCOPYRIGHT: (C)2010,JPO&INPIT