Composite material compositions using wastepaper and method of p

Details Composite material compositions using wastepaper and method of p Composite material compositions using wastepaper and method of p

1980-04-28

1982-07-13

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

264117, 264118, 264122, 264126, 427212, 427288, 427326, 524 35, C08L 102

Patent

active

043393632

ABSTRACT:
This invention provides composite material compositions comprising wastepaper, a thermoplastic resin and/or other additive(s), said compositions having higher heat resistance, flame retardancy and mechanical strength and smaller linear shrinkage in molding than the conventional compositions of synthetic resins alone or blended with woodmeal or an inorganic filler. There is also provided a method of producing said compositions comprising a wastepaper crushing step, a step of mixing crushed wastepaper with a thermoplastic resin and/or other additive(s) while drying said wastepaper, a blend melting step, a blend kneading step and a blend granulating step. In an embodiment of this invention, scraps of moldings from the composite material compositions using wastepaper may be mixed with wastepaper, a thermoplastic resin and/or other additive(s) and similarly treated and molded into a new composition.

REFERENCES:
patent: 2416888 (1947-03-01), Wentworth
patent: 3969314 (1976-07-01), Grigull
patent: 4225640 (1980-09-01), Erb
patent: 4228116 (1980-10-01), Colombo et al.

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