Filled-polystyrene laminates

Details Filled-polystyrene laminates Filled-polystyrene laminates

1976-09-14

1978-07-18

Ives, P. C.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

428441, 428497, 428494, 428158, 428304, 428308, 428454, 428310, 428515, 428516, 428451, 428517, 428519, 428443, 428538, 260 37R, 260876B, 260 4257, 521122, 521123, B65D 100, B32B 2708

Patent

active

041010507

ABSTRACT:
Thermoplastic polystyrene laminates are disclosed, one of the layers of which comprises a filled polystyrene composition containing from about 5 to about 50 of filler, such as calcium carbonate, clay, asbestos, etc. The filled polystyrene composition is prepared from a filled polystyrene masterbatch of impact polystyrene, filler, rubber and mineral oil, cut back by mixing with other polystyrene, either crystal or impact polystyrene. Laminates may be prepared by coextrusion. The filled polystyrene layer may be foamed. The laminates may be used for making formed articles such as cups, containers, trays, plates, sheets, etc.

REFERENCES:
patent: 3284542 (1966-11-01), Carrock et al.
patent: 3413249 (1968-11-01), Luftglass et al.
patent: 3660849 (1972-05-01), Jonnes et al.
patent: 3846360 (1974-11-01), Needham
patent: 3861994 (1975-01-01), Stark
patent: 3916076 (1975-10-01), Eastes
patent: 3976608 (1976-08-01), Buckler et al.
patent: 4008347 (1977-05-01), Amberg et al.

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