Microporous membrane, battery separator and battery

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United States of America Patent

APP PUB NO 20090226814A1
SERIAL NO

12044729

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Abstract

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A microporous polymeric membrane having excellent properties for use as a battery separator is provided. The membrane is produced by heat-setting the microporous polymeric membrane in at least a first stage and a final stage, the first stage being upstream of the final stage and the temperature of the first stage being at least 15° C. cooler than the temperature of the final stage.

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Patent Owner(s)

Patent OwnerAddress
TORAY TONEN SPECIALTY SEPARATOR GODO KAISHATOCHIGI PREFECTURE 329-2763

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kaimai, Norimitsu Yokohama-shi , JP 27 440
Kimishima, Kohtaro Yokohama-shi , JP 14 161
Takita, Kotaro Nasusiobara-shi , JP 66 901

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