MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM
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United States of America Patent
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Issued Date -
Jul 25, 2013
app pub date -
Mar 7, 2011
filing date -
Mar 11, 2010
priority date (Note) -
Abandoned
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Abstract
The invention relates to microporous membranes having a thickness 19.0 micrometer or less, the membranes having a relatively high porosity, air permeability and puncture strength. Such membranes can be produced by extrusion and are suitable for use as battery separator film.
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