Abrasion process for the manufacture of microporous film
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United States of America Patent
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May 23, 1989
Issued Date -
N/A
app pub date -
Sep 3, 1987
filing date -
Aug 4, 1986
priority date (Note) -
Expired
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Abstract
A vapor permeable and liquid impermeable microporous film suitable for diaper back sheets and other disposable applications is produced by abrading a filled, unoriented film by passing it through at least one set of at least two cooperating nip rollers, each having an abrasive grit surface.
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