Heat-sealable plastic film, process for its manufacture, and the

Details Heat-sealable plastic film, process for its manufacture, and the Heat-sealable plastic film, process for its manufacture, and the

1979-03-30

1981-12-01

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428 36, 428332, 428336, 428347, 428349, 428402, 428404, 428515, 428516, B65D 100, C09J 702, B32B 2708

Patent

active

043037089

ABSTRACT:
Disclosed is an opaque film of thermoplastic organic material which has been oriented by biaxial stretching, comprising a base layer of a polymer or copolymer of an .alpha.-olefin having 2 to 6 carbon atoms containing between about 1 and 25 percent by weight, calculated on the weight of the polymer, of finely distributed solid particles ranging in size from about 0.2 to 20 .mu.m, and carried on at least one surface of the base layer, a heat-sealable layer comprising a copolymer of propylene with ethylene, a copolymer of propylene with butene, or a terpolymer of propylene with ethylene and a further .alpha.-olefin having from 4 to 10 carbon atoms. Also disclosed are a method of making this film and a package made therefrom.

REFERENCES:
patent: 3808027 (1974-04-01), Anderson et al.
patent: 4010307 (1977-03-01), Canard et al.
patent: 4086383 (1978-04-01), Yamano et al.
patent: 4101050 (1978-07-01), Buckler et al.
patent: 4123576 (1978-10-01), Kobayashi et al.
patent: 4132050 (1979-01-01), Young
patent: 4147827 (1979-04-01), Breidt
patent: 4148972 (1979-04-01), Yamane et al.
patent: 4256784 (1981-03-01), Gebhardt et al.

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