Method of providing a fibrous thermoplastic resin for depolymeri

Details Method of providing a fibrous thermoplastic resin for depolymeri Method of providing a fibrous thermoplastic resin for depolymeri

1975-03-24

1976-10-26

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 37, 264118, 264142, 264143, 264176F, 264238, 526914, C08F 850, B29C 2500

Patent

active

039884066

ABSTRACT:
A method of providing a fibrous thermoplastic resin for depolymerization thereof wherein the fibrous thermoplastic resin is formed into a shaped article having a specific gravity of at least 1/2 of the true specific gravity of the fibrous thermoplastic resin, said shaped article consisting of the fibrous thermoplastic resin mass having on its surface a crusty thin resin layer which may be press-bonded or melt-bonded to the mass. The thus provided shaped article of the fibrous thermoplastic resin can be advantageously employed as a starting material for the depolymerization reaction. In accordance with this invention, the time required for completion of the depolymerization can be greatly shortened as compared with that of the conventional technique and the rate and efficiency of the depolymerization can be greatly improved. Further, according to this invention, fibrous thermoplastic resins can be depolymerized effectively on an industrial scale while automatically conducting unit-operations such as storing, transportation, weighing, and charging into a reaction vessel in much simplified manners.

REFERENCES:
patent: 2028240 (1936-01-01), Palmer
patent: 2433727 (1947-12-01), Arnold
patent: 2779974 (1957-02-01), Billing
patent: 3227703 (1966-01-01), Copenhaven
patent: 3287480 (1966-11-01), Wechsler
patent: 3444155 (1969-05-01), Fish

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