Microporous polyolefin film
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United States of America Patent
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Nov 17, 2009
Grant Date -
Feb 15, 2007
app pub date -
Apr 2, 2004
filing date -
Apr 4, 2003
priority date (Note) -
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Abstract
A microporous polyolefin film that comprises polyethylene and polypropylene as essential components and is composed of a laminate film of two or more layers, wherein the percentage of polypropylene blended in at least one surface layer of the film is more than 50% by weight and 95% by weight or less and the content of polyethylene in the entire film is 50% or more and 95% or less.
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