Heat sealable packaging film comprising propylene polymer substrate and olefin surface layer blend of polybutene-1 and ethylene or a propylene copolymer
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United States of America Patent
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-
Jul 13, 1982
Issued Date -
N/A
app pub date -
Nov 3, 1980
filing date -
Oct 5, 1979
priority date (Note) -
Expired
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Abstract
Multiple-layer, heat-sealable films are described comprising a substrate layer of polypropylene homopolymer or copolymer, or blends thereof with compatible polyolefins; and at least one heat-sealable surface layer of a blend poly(1-butene), and a copolymer of ethylene or propylene and a higher olefin. The films are prepared by extrusion coating or coextrusion and can be oriented.
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