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AssigneesJapan Vilene Company, Ltd., Ube-Nitto Kasei Co., Ltd.
InventorsMasanao Tanaka, Hiroaki Yamazaki, Yoshihiko Kondo, Keisuke Takahashi, Toshiaki Takase, Shinji Oota
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A battery separator is provided which is hardly broken by tension during the manufacture of batteries, is hardly punctured with a plate flash, and is hardly torn off with a plate edge, thereby hardly causing a short circuit. Accordingly, the separator can facilitate the stable manufacture of the batteries. The battery separator is equipped with a fiber sheet containing a polypropylene fiber having a tensile strength of not less than 10 g/d (denier) and a Young's modulus of not less than 800 kg/mm2, said separator having a resistance of not less than 585 gf to puncture by edge, or is equipped with a fiber sheet containing not less than 10 mass % of a polypropylene fiber having a tensile strength of not less than 10 g/d (denier) and a Young's modulus of not less than 800 kg/mm2.
A battery separator which is equipped with a fiber sheet containing polypropylene fibers where their tensile strength is 10 g/d (denier) or more and their Young's modulus is 800 kg/mm2 or more, said separator possessing a resistance to puncture by an edge with 585 gf or more, and having a mass per unit area is 100 g/m2 or less.
A battery separator which is equipped with a fiber sheet containing not less than 10 mass % of polypropylene fibers having a tensile strength of 10 g/d (denier) or more and a Young's modulus of 800 kg/mm2 or more, the separator possessing a mass per unit area of 100 g/m2 or less.
Dependencies are inferred from the claim text.