Thermoformable laminate

Details Thermoformable laminate Thermoformable laminate

Filed on

1986-08-04

Date issued

1988-04-05

Examiner

Thomas, Alexander S.

Patent Class

Stock material or miscellaneous articles

SubClass

Web or sheet containing structurally defined element or...

SubSubClass

Adhesive outermost layer

Other Related Categories

4284744, 4284755, 4284758, 4284763, 428516, B32B 2700, B32B 2708

Type

Patent

Status

active

Patent number

047358556

Description

ABSTRACT:
A thermoformable polymeric laminate with good optical properties, extended shelf life, and memory characteristics comprises a core layer comprising an oxygen barrier material; a polyamide layer disposed on each surface respectively of the core layer, the polyamide having controlled crystallinity; a sealant layer; an outer layer comprising a moisture barrier material; and an intermediate layer disposed between the polyamide layer and each of the sealant layer and outer layer respectively, and comprising an anhydride grafted polyolefin.

REFERENCES:
patent: 3912843 (1975-10-01), Brazier
patent: 4407873 (1983-10-01), Christensen et al.
patent: 4501798 (1985-02-01), Koschak et al.
patent: 4612221 (1986-09-01), Biel et al.
patent: 4640852 (1987-02-01), Ossian
patent: 4683170 (1987-07-01), Tse et al.

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