Single-layer polypropylene membrane film for batteries, having a shut-off function
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United States of America Patent
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Oct 8, 2013
Grant Date -
Mar 17, 2011
app pub date -
Apr 23, 2009
filing date -
May 2, 2008
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Abstract
The invention relates to a biaxially oriented, single-layer microporous film which has a shut-off function and is made of propylene homopolymer, propylene block copolymer I and β-nucleation agent. The melting range of the propylene block copolymer I starts at a temperature ranging from 50 to 120° C. The invention also relates to using the film as a separator in primary or secondary battery.
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