MICROPOROUS MEMBRANE, BATTERY SEPARATOR AND BATTERY
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United States of America Patent
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app pub date -
Oct 2, 2012
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Mar 7, 2008
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Abstract
A method of manufacturing a microporous polymeric membrane including: 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 a temperature of the first stage being at least 15° C. cooler than a temperature of the final stage.
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