Food package, retort lidding, and coextruded film therefor

Details Food package, retort lidding, and coextruded film therefor Food package, retort lidding, and coextruded film therefor

1990-01-16

1993-12-28

Thomas, Alexander S.

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

428 349, 428 352, 428495, 428493, 428494, 428516, 428517, 428523, B32B 2708, B65D 6540

Patent

active

052737977

ABSTRACT:
A seal layer for use in heat sealed containers, especially retortable polymer containers. A semirigid or rigid packaging container with a multilayer laminate heat sealed to a tray flange, the laminate having a barrier layer and the lidding being easily opened by cohesive failure of a layer containing as elastomer. The elastomer is preferably PIB in a heat seal film layer on a polypropylene tray.

REFERENCES:
patent: 4340641 (1982-07-01), Weiner
patent: 4769261 (1988-09-01), Hazelton et al.
patent: 4778697 (1988-10-01), Genske et al.
patent: 4784885 (1988-11-01), Carespodi
patent: 4879177 (1989-11-01), Boice
patent: 4921749 (1990-05-01), Bossaert et al.
patent: 4929479 (1990-05-01), Shishido et al.
patent: 4937139 (1990-06-01), Genske et al.

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