Thermoplastic film having improved handling and sealing characte

Details Thermoplastic film having improved handling and sealing characte Thermoplastic film having improved handling and sealing characte

1981-05-29

1982-10-05

Ives, P.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428335, 428516, 428518, 428520, 428910, 264176R, 2642091, 2065242, 426127, 229 87F, B65D 6540, B65D 7506, B65D 7512, B65D 8550

Patent

active

043528449

ABSTRACT:
Disclosed is a multi-layer, heat shrinkable, thermoplastic packaging film which will produce heat seals having improved strength both in the presence of and absence of grease at elevated temperatures, e.g., at shrink temperatures. The layer providing the sealing surface comprises an ethylene-vinyl acetate copolymer which is more crystalline and about half the thickness of the adjacent layer of less crystalline ethylene-vinyl acetate copolymer. Bags for food products can be made from the film at a faster rate than with prior art films.

REFERENCES:
patent: 3741253 (1973-06-01), Brax et al.
patent: 3932693 (1976-01-01), Shaw et al.
patent: 4178401 (1979-11-01), Weinberg et al.
patent: 4240993 (1980-12-01), Sun
patent: 4247584 (1981-01-01), Widiger et al.

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