LAMINATED POROUS FILM

摘要

PROBLEM TO BE SOLVED: To provide a laminated porous film which is excellent in ion permeability or shutdown properties and has excellent shape stability at a high temperature.SOLUTION: There is provided a laminated porous film in which a glass cloth layer containing a binder is laminated and integrated on one surface or both surfaces of a porous film layer composed of a polyolefin. The glass cloth layer has a thickness of less than 25μm and the binder resin is composed mainly of a polyolefin. There is provided a separator for a lithium secondary battery composed of the laminated porous film.