Particulate-containing foamed plastic

Details Particulate-containing foamed plastic Particulate-containing foamed plastic

1980-06-24

1981-12-29

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 37, 264 53, 264DIG17, 264DIG83, 425817R, B29D 2700

Patent

active

043082262

ABSTRACT:
A method is disclosed for incorporating particulate material in reactive resin mixes produced by the RIM method in the molding of foamed or unfoamed plastic articles, wherein the particulate material is introduced into the resin mix in a manner which substantially eliminates the severe abrasive effect such particulate material produces under conditions existing in prior methods due to flow through the various passges of the mixing head. The particulate material may constitute reinforcement for a plastic article, in which case short lengths of glass, carbon, graphite or other mineral or metal fibers and the like may be used. Alternatively, granular particulates such as carbon black, metal or mineral oxides, pigments, etc. may be incorporated for coloring the product, or increasing its resistance to actinic rays, or for imparting increased rigidity to the molded product, etc.

REFERENCES:
patent: 3256218 (1966-06-01), Knox
patent: 3634565 (1972-01-01), Schaerer
patent: 3843100 (1974-10-01), Haas et al.
patent: 3857550 (1974-12-01), Knipp et al.
patent: 4055548 (1977-10-01), Carleton et al.
patent: 4073840 (1978-02-01), Saidla
patent: 4082512 (1978-04-01), Wingard et al.
patent: 4112014 (1978-09-01), Smith et al.
patent: 4218543 (1980-08-01), Weber et al.

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