Process for drawing plastic laminates

Details Process for drawing plastic laminates Process for drawing plastic laminates

1986-04-03

1987-06-23

Schofer, Joseph L.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428483, B27N 502, B32B 2706

Patent

active

046752196

ABSTRACT:
Disclosed is a process for drawing plastic laminates, which comprises draw-forming a laminate comprising a layer of a polyester composed essentially of ethylene terephthalate units, a gas barrier layer of an olefinvinyl alcohol copolymer and an adhesive layer interposed therebetween under temperature and draw ratio conditions satisfying a requirement represented by the following formula: ##EQU1## wherein X stands for the area draw ratio (%) defined by the formula of X=100(tho/th-1) in which tho stands for the thickness of the laminate before draw forming and th stands for the thickness of the laminate after draw forming, Y stands for the vinyl alcohol content (mole %) in the olefinvinyl alcohol copolymer, and t stands for the draw forming temperature (.degree. C.).

REFERENCES:
patent: 3949114 (1976-04-01), Viola et al.
patent: 4082854 (1978-04-01), Yamada et al.
patent: 4284671 (1981-08-01), Cancio et al.
patent: 4451512 (1984-05-01), Yazaki et al.
patent: 4481238 (1984-11-01), Fagerburg et al.
patent: 4482587 (1984-11-01), Fagerburg et al.
patent: 4482588 (1984-11-01), Fagerburg et al.
patent: 4564541 (1986-01-01), Taira et al.

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