Stock material or miscellaneous articles – Composite – Of polyamide
Patent
1988-07-06
1990-09-25
Sluby, P. C.
Stock material or miscellaneous articles
Composite
Of polyamide
4284769, 428507, 428516, 428518, 264175, 2641761, 156327, B32B 2708, B28B 320
Patent
active
049592718
ABSTRACT:
An article for the storage of food products, the body of the article comprising multilayers of different thermoplastic resins which together provide excellent water vapor and gas barrier properties to preserve the food product while in its packaged state. The article contains at least one skin layer, one barrier layer, and a tie layer interposed between each skin layer and the barrier layer. The tie layer contains a graft copolymer formed from a polymerizable mixture comprising a monomer mixture and a preformed polymer which is capable of imbibing the monomer mixture. The preformed polymer is allowed to contact the monomer mixture for a length of time and at a temperature such that enough of the monomer mixture is imbibed therein, and then the polymerizable mixture is polymerized.
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Sluby P. C.
The Dow Chemical Company
Zindrick Thomas D.
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