Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1974-05-31
1976-05-18
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
156244, 156309, 156324, 264 92, 264174, 264210R, 264321, B29F 310
Patent
active
039579409
ABSTRACT:
In a process for extrusion coating of both sides of a foamed polystyrene sheet with a rubber modified polystyrene the specific improvement of crushing the coated foam sheet such that it will rebound to only 30 to 70 percent of its original thickness results in a product of improved processing characteristics. This crushed sheet can be thermally formed into a wrinkle free china-like surface useful in making insulated dishes, trays, food containers and the like.
REFERENCES:
patent: 3039911 (1962-06-01), Fox
patent: 3360415 (1967-12-01), Hellman et al.
patent: 3386877 (1968-06-01), Skochdopole et al.
patent: 3398224 (1968-08-01), Spencer
patent: 3616020 (1971-10-01), Whelan et al.
patent: 3669794 (1972-06-01), Mazur
Le Duc Edward C.
Schubert John C.
Gilkes Arthur G.
McClain William T.
Standard Oil Company
Thurlow Jeffery R.
Welsh Stanley M.
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