Vacuum packaging with hermetic reclosure

Details Vacuum packaging with hermetic reclosure Vacuum packaging with hermetic reclosure

1991-12-04

1992-12-01

Weinstein, Steven

Food or edible material: processes, compositions, and products

Packaged or wrapped product

Three or more layered packaging materials

426106, 426129, 426126, 426396, 426415, 206466, 2291231, 22912535, 156152, 156327, B65B 3102, B65D 8120, B65D 1700

Patent

active

051679744

ABSTRACT:
A package is provided for enclosing a proteinaceous product under vacuumized and hermetically sealed conditions. The package has a peelable hermetic reclosure and a body member of semi-rigid preformed plastic with a first planar marginal portion and a central portion shaped to provide a packaging chamber. The package also has a flexible dimensionally stable base member having a corresponding second planar marginal portion and a central portion to provide a closure for said packaging chamber. The two planar marginal portions are adhered together face-to-face by an adhesive to provide at least a portion of the hermetic seal wherein said adhesive is a high molecular weight pressure sensitive hot-melt adhesive having a viscosity of between about 5,000 and about 100,000 centipoise at 300.degree. F. and said adhesive provides a peelable hermetic reclosure. Curling and wrinkling of the flexible base member are precluded by utilizing a flexible base member that is a film component, preferably a polyolefin film component, which has a coefficient of thermal expansion that is equal to or greater than that of the semi-rigid preformed plastic body member.

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