Thermoformable coextruded multilayered structure

Details Thermoformable coextruded multilayered structure Thermoformable coextruded multilayered structure

1982-10-04

1984-04-03

Ives, P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428 35, 428349, 428516, 428517, 428520, 264515, 264176R, B65D 564, B32B 2708

Patent

active

044408242

ABSTRACT:
A multilayer thermoplastic sheet suitable for thermoforming into containers, the sheet being simply and expeditiously prepared and provided with consistent and reliable bonds between layers in a single process step by coextruding a polyolefin having moisture barrier properties with a high impact polystyrene layer, to provide heat sealability, a printable surface, and quick and inexpensive thermoforming for the multilayer sheet.

REFERENCES:
patent: 3589976 (1971-06-01), Erb
patent: 4101047 (1978-07-01), Geppert et al.
patent: 4101050 (1978-07-01), Buckler et al.
patent: 4183435 (1980-01-01), Thompson et al.
patent: 4234663 (1980-11-01), Catte' et al.
patent: 4292355 (1981-09-01), Bonis
"Polyethylene-high impact polystyrene laminate", Research Disclosure, Dec. 1979, No. 18818, p. 670.
"Market Potential For Coextrudable Adhesives", David P. Dumbleton, pp. 55, 57-64.
"Du Pont CXA 1123 & 1124".
"CXA Coextrudable Adhesives For Coextrusion Coating and Laminating", P. S. Blatz, E. I. DuPont de Nemours & Co., Inc., Nov. 4, 1981, pp. 2-11+.

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