Non-sealable, multi-layer polypropylene film

Details Non-sealable, multi-layer polypropylene film Non-sealable, multi-layer polypropylene film

1991-03-21

1993-09-21

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

15624411, 428216, 428402, 428447, 428349, 428516, B32B 2302

Patent

active

052467635

ABSTRACT:
A non-sealable, multi-layer polypropylene film which includes on top of a polypropylene base layer at least one top layer which includes a mixture of a propylene/butylene copolymer and an ethylene/propylene/butylene terpolymer, the mixture containing ethylene in an amount of about 0.1 to 7% by weight, propylene in an amount of about 68 to 95.9% by weight and butylene in an amount of about 4 to 25% by weight, relative to the total weight of the mixture. The layer thickness of the toplayer is not greater than 0.3 .mu.m. A process for producing the film is also described.

REFERENCES:
patent: 4502263 (1985-03-01), Crass et al.
patent: 4720420 (1988-01-01), Crass et al.
patent: 4912091 (1990-03-01), Bothe et al.
patent: 4983447 (1991-01-01), Crass et al.
patent: 5026592 (1991-06-01), Janocha et al.

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