Method of making foam material

Details Method of making foam material Method of making foam material

1992-02-14

1993-04-20

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264109, 264321, 264DIG7, 264DIG69, B29C 6722

Patent

active

052040402

ABSTRACT:
A method of making foam material includes a process of impregnating comminuted particles of a previously formed foam material with a first foaming reaction solution made up of polyol, catalyst and additives and with a second foaming reaction solution containing diisocyanate. The comminuted particles are also subjected to a rolling pressure when they are being impregnated with the first foaming reaction solution. The impregnated particles are transferred to a forming area provided with steam serving to accelerate the foaming reaction of the impregnated particles. The foam material so produced is provided with excellent properties.

REFERENCES:
patent: 3452122 (1969-06-01), Stern et al.
patent: 3590425 (1971-07-01), Lieberman
patent: 3686047 (1972-08-01), Miller
patent: 4242306 (1980-12-01), Kreuer et al.
patent: 4278482 (1981-07-01), Poteet et al.
patent: 4666646 (1987-05-01), Chang

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