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1. (WO2013147071) POROUS FILM AND MULTILAYER POROUS FILM

Pub. No.:    WO/2013/147071    International Application No.:    PCT/JP2013/059355
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Fri Mar 29 00:59:59 CET 2013
IPC: H01M 2/16
B32B 5/32
B32B 27/32
C08J 9/00
Applicants: ASAHI KASEI E-MATERIALS CORPORATION
旭化成イーマテリアルズ株式会社
Inventors: MURATA, Hiroshi
村田 博
HATAYAMA, Hiroshi
畑山 博司
UCHIDA, Yuki
内田 優紀
ISHIKAWA, Masaki
石川 真己
Title: POROUS FILM AND MULTILAYER POROUS FILM
Abstract:
Provided is a multilayer porous film having a porous film that contains a polyolefin-based resin as a primary component, and a porous layer that contains an inorganic filler and a resin-based binder laminated on at least one surface of the porous film. In the porous film, the average pore diameter (d) calculated using a gas-liquid method, the path curvature (τa), and the number of pores (B) are respectively d = 0.035-0.060 μm, τa = 1.1-1.7, and B=100-500 pores/μm2, and the film thickness of the porous film is L=5-22 μm.