BIAXIALLY ORIENTED FILM HAVING A PARTICLE-CONTAINING POROUS LAYER
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United States of America Patent
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Issued Date -
Feb 16, 2017
app pub date -
Apr 21, 2015
filing date -
Apr 25, 2014
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Abstract
The invention relates to a biaxially oriented single-layer or multilayer porous film which comprises at least one porous layer and said layer comprises at least one propylene polymer, at least one β-nucleating agent and particles, said particles having a melting point of over 200° C. and at most an agglomerate or at most a particle having a particle size of >1 μm being detectable on a REM recording of a film sample of 10mm2.
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