Stretched microporous material
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United States of America Patent
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May 23, 1989
Issued Date -
N/A
app pub date -
Sep 15, 1988
filing date -
Apr 24, 1987
priority date (Note) -
Expired
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Abstract
Precursor microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insoluble siliceous filler, and interconnecting pores is stretched to increase the porosity and provide regions of stretch-induced molecularly oriented polymer in the matrix.
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