Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1975-10-20
1977-11-01
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264 55, 264321, 264345, 264DIG5, 264DIG15, B29D 2700
Patent
active
040565874
ABSTRACT:
Foam styrene polymer sheet is expanded to form foam products having lower density by a process which includes (a) contacting the foam styrene polymer sheet with an aqueous composition, (b) maintaining the aqueous composition in contact with the sheet to effect impregnation of the sheet by the aqueous composition, and thereafter (c) heating the impregnated sheet to expand the sheet. The expanded products are useful as thermal insulation and packaging material.
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Bender, Rene J., "Handbook of Foamed Plastics", Libertyville, Ill., Lake Publ. Corp., c. 1965, pp. 242-243.
Skinner, S. J.; S. Baxter, S. D. Eagleton and P. J. Gray, "How Polystyrene Foam Expands" in Modern Plastics, Jan. 1965, pp. 171-174, 176, 178.
Honkanen Arvid
Joonase Paul
Anderson Philip
Hardaway John B.
Lee, Jr. William D.
Toney John J.
W. R. Grace & Co.
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