CAST FILMS, MICROPOROUS MEMBRANES, AND METHOD OF PREPARATION THEREOF
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United States of America Patent
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Issued Date -
Nov 1, 2012
app pub date -
Jun 18, 2010
filing date -
Jun 23, 2009
priority date (Note) -
Abandoned
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Abstract
There is provided a method for controlling the morphology of a cast film. The method comprises extruding a cast film by controlling a cooling rate of the cast film by applying on the film a gas at a gas cooling rate of at least about 0.4 cm3/s per kg/hr in accordance with the extrudate flow rate.
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