LAMINATE POROUS FILM, SEPARATOR FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a laminate porous film having excellent heat resistance and thermal adhesiveness, and exhibiting excellent characteristics when the film is used for a separator for a non-aqueous electrolyte secondary battery.SOLUTION: In a laminate porous film, a coating layer (layer II) containing filler (a) and resin binder (b) is provided at least on one side of a polyolefin-based resin porous film (layer I). T-type peel strength when surfaces of the two laminate porous films are heat-bonded to each other, is ≥30 gf/15 mm.