Heat sealable packaging film comprising propylene polymer substr

Details Heat sealable packaging film comprising propylene polymer substr Heat sealable packaging film comprising propylene polymer substr

1979-10-05

1981-06-23

McCamish, Marion

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

15624411, 428500, 428515, 428523, 428 35, B32B 2708

Patent

active

042751195

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 an interpolymer of propylene and two different higher alpha-olefins; a copolymer of butene-1 and a higher alpha-olefin or an interpolymer of ethylene, propylene and a higher olefin. The films are prepared by extrusion coating or coextrusion and can be oriented.

REFERENCES:
patent: T955009 (1977-02-01), Lansbury
patent: 4128662 (1978-11-01), Weiner et al.

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