Composite stretch wrap film

Details Composite stretch wrap film Composite stretch wrap film

1982-12-01

1984-03-13

Ives, P.

Stock material or miscellaneous articles

Composite

Of polyester

428484, 428349, 428516, 428520, 428323, 428 35, 524310, 264176R, B32B 2706, C08L 2316

Patent

active

044367880

ABSTRACT:
A composition adapted for processing into stretch wrap film. The composition comprises between about 40 and about 90% by weight of a high molecular weight copolymer of ethylene and vinyl acetate containing between about 4 and about 25% by weight of repeating units derived from vinyl acetate and having a melt index of between about 0.1 and about 4.0. The composition further comprises between about 8 and about 55% by weight of a linear copolymer of ethylene and a higher alkene. Such linear copolymer has a specific gravity of between about 0.917 and about 0.945. The invention further includes stretch wrap film, a method of producing stretch wrap film of differential cling properties, and a composite film constituted of a layer of the aforesaid ethylene vinyl acetate copolymer and a layer of the liner copolymer of ethylene and a higher alkene.

REFERENCES:
patent: 4082877 (1978-04-01), Shadle
patent: 4126649 (1978-11-01), Decroix
patent: 4194039 (1980-03-01), Mueller
patent: 4222913 (1980-09-01), Cooper
patent: 4247584 (1981-01-01), Widiger et al.
patent: 4252846 (1981-02-01), Romesberg et al.

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