Process for manufacturing finished and semi-finished products fr

Details Process for manufacturing finished and semi-finished products fr Process for manufacturing finished and semi-finished products fr

1975-12-29

1981-02-10

Derrington, James H.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

260 23, 260 6, 260 75, 260 8, 260 9, 260 174CL, 260 37N, 260 37PC, 260 40R, 260 42, 260 4217, 260 4218, 260 4243, 260 4246, 260 4247, 260 4249, 260 4252, 428286, 428287, C08K 702, C08K 704, C08K 714

Patent

active

042502225

ABSTRACT:
A process is disclosed for manufacturing finished and semi-finished articles from mixtures of normally incompatible synthetic resin scrap materials. The process comprises coarsely grinding thermoplastic scrap materials containing two or more mutually incompatible thermoplastic resins and possibly up to 25 parts % by weight of foreign materials, incorporating into the coarsely ground thermoplastic resin mixture through the application of heat, pressure, or a sequential or simultaneous application of heat and pressure, from about 5 to about 25 parts by weight of a fibrous material, the individual fibers in said fibrous material having an average length equal to at least three times the average size of the fragments constituting the coarsely ground thermoplastic resin mixture, and finally, forming the resin/fiber mass into finished or semi-finished article employing known and conventional techniques.

REFERENCES:
patent: 3654219 (1972-04-01), Boyer
patent: 3687873 (1972-08-01), Kropscott et al.
Mod. Plast. Intern, Jun., 1972, p. 10.
Plastiques Mod. Elastom, Nov. 1972, p. 159.
Oleesky, Handbook of Reinforced Plastics, Reinhold Pub. Corp., New York, 1964, pp. 129 & 142.

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