LAMINATED POROUS FILM, METHOD OF PRODUCING THE SAME, AND SEPARATOR FOR ELECTRICITY STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a laminated porous film that has excellent slipperiness, permeability, and productivity, and has an improvement in deterioration of yield due to falling of particles when the laminated porous film is used as a separator for electricity storage device.SOLUTION: A laminated porous film has a slippery layer substantially containing no particle on at least one surface of a porous film composed mainly of polypropylene resin. The laminated porous film has an air permeability resistance of 50-10,000 sec/100 ml. The slippery layer has a thickness of 1 nm or more and less than 200 nm.