Multi-layered structure

Details Multi-layered structure Multi-layered structure

1990-10-29

1992-11-17

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283197, 4283199, 4284761, 428516, 428520, B32B 326, B32B 2708, B32B 2714, B32B 2732

Patent

active

051642581

ABSTRACT:
A multilayer structure is provided which has a core layer of a hygroscopic barrier material and inner and outer surface layers designed to facilitate the escape of moisture which becomes absorbed in the core layer during retort sterilization. The inner and outer surface layers include a polyolefin material which is either foamed or compounded with a filler in order to cause a substantial increase in the water vapor transmission rate of the polyolefin. Adhesive layers are present between the core layer and the inner and outer layers. Each of the inner and outer layers may include one or more individual film layers, depending on the requirements of the specific packaging application.

REFERENCES:
patent: 4681803 (1987-07-01), Liu
patent: 4701370 (1987-10-01), Park
patent: 4702954 (1987-10-01), Duncan

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