Process for the production of plastics from at least two free-fl

Details Process for the production of plastics from at least two free-fl Process for the production of plastics from at least two free-fl

1991-08-13

1992-10-06

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling rate of movement of molding material or its...

264349, 425145, B29B 774

Patent

active

051529432

ABSTRACT:
The maintenance of the exact metering ratio during the production of plastics, particularly foams, from free-flowing reactants loaded with pulverulent to fine-grained or fibrous additives can be improved by mixing the additive in compacted form in a preliminary mixer with at least one of the reactants. The pressure in the preliminary mixer is kept constant.

REFERENCES:
patent: 3583680 (1971-06-01), Ratingen et al.
patent: 3728056 (1973-04-01), Theysohn
patent: 3847022 (1974-11-01), McGinnis
patent: 4068831 (1978-01-01), Ebeling et al.
patent: 4177234 (1979-12-01), Lowry
patent: 4721589 (1988-01-01), Harris

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