Method of thermoforming and product made therefrom

Details Method of thermoforming and product made therefrom Method of thermoforming and product made therefrom

1978-11-02

1980-09-02

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

4619, 428215, 428516, 428520, B32B 700, B65D 700, A47K 100

Patent

active

042206839

ABSTRACT:
A method of thermoforming a thermo-plastics sheet carrying a protective layer of polyethylene on at least one of the surfaces of the sheet comprising heating the assembly of sheet together with its protective layer to above the softening point of the thermoplastic and subsequently stretching the assembly to a desired shape.

REFERENCES:
patent: 2648099 (1953-08-01), Dunmire
patent: 3205110 (1965-09-01), Rinderspacher et al.
patent: 3404056 (1968-10-01), Baldwin
patent: 3579395 (1971-05-01), Rath
patent: 3629381 (1971-12-01), Walker
patent: 3971687 (1976-07-01), Greer et al.
patent: 3971866 (1976-07-01), Johnson
"Polythene", The Technology and Uses of Ethylene Polymers, A. Renfrew, Oct. 5, 1960, p. 564.

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