Polyolefinic films of improved impermeability characteristics and process for their production
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United States of America Patent
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Oct 11, 1988
Grant Date -
N/A
app pub date -
Mar 21, 1986
filing date -
Mar 25, 1985
priority date (Note) -
Expired
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Abstract
Polyolefinic films having improved impermeability characteristics to gases and vapors, said films being coated on either one or both its surfaces by a layer of a copolymer containing functional hydroxylic groups, functional acid carboxylic groups and optionally--esteric groups and obtained by hydrolysis of copolymers consisting of an unsaturated ester and of an unsaturated acid or corresponding anhydride.
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