Polystyrene foamed sheet suitable for forming

Details Polystyrene foamed sheet suitable for forming Polystyrene foamed sheet suitable for forming

1983-05-10

1985-07-09

Van Balen, William J.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428215, 428220, 4283186, 4283199, 428339, 428910, 521139, B32B 102, B32B 2706, B32B 2730

Patent

active

045282218

ABSTRACT:
A polystyrene foamed sheet suitable for thermoforming and containers such as cups or trays formed therefrom, the foamed sheet comprising a polystyrene resin as the base resin which contains a specific quantity of each a rubber component and a filler, having specific bulk density, thickness, stretch ratio and residual gas quantity, and said sheet being preferably laminated with a film.

REFERENCES:
patent: 3619344 (1971-11-01), Wolinski
patent: 3861994 (1975-01-01), Stark
patent: 4011357 (1977-03-01), Haase
patent: 4101050 (1978-07-01), Buckler et al.
patent: 4426065 (1984-01-01), Komatsuzaki et al.
patent: 4463861 (1984-08-01), Tsubone et al.

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