Patent ID: 8426054
Filing Date: 2013-04-23
Classification: B32B,D01D,H01M,Y02E,Y10T

Abstract:
1. A laminated porous film, comprising: a porous membrane layer (A layer) having a thickness of 10 μm or greater; and a non-woven fabric layer (B layer) having a fiber diameter of 1 μm or less; wherein: a ratio (AP the air permeability prior to heating (AP the non-woven fabric layer (B layer) comprises a thermoplastic resin (b) as a main constituent; and the thermoplastic resin (b) comprises at least one member selected from the group consisting of polyfluorinated vinylidenes, polyacrylonitriles, aramides, polyimides, polyamide imides, polyacrylonitriles, polyacrylates, celluloses, polyazomethines, polyacetylenes, and polypyrroles.