Microporous film of high molecular weight polyolefin and process

Details Microporous film of high molecular weight polyolefin and process Microporous film of high molecular weight polyolefin and process

1996-07-18

1999-03-16

Fortuna, Ana

Liquid purification or separation

Filter

Material

21050027, 56 4, 264 41, B01D 3900

Patent

active

058825185

ABSTRACT:
A microporous film of high molecular weight polyolefin useful in the prepration of filter mediums or non-aqueous battery separators and a process for producing the film are disclosed. The microporous film of high molecular weight polyolefin contains leaf vein-like fibrils as a main constituent on each of which fibrils indeterminate-form crystallites of not more than 1 .mu.m in size flocculate and has an intrinsic viscosity,

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patent: 5106563 (1992-04-01), Yagi et al.
patent: 5169712 (1992-12-01), Tapp
patent: 5208098 (1993-05-01), Stover

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