Process for manufacturing stratified materials

Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...

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264112, 264134, B29B 300

Patent

active

039754839

ABSTRACT:
The present invention provides novel rigid and flexible stratified shaped fiber-reinforced plastic aticles. These are produced by impregnating a layer of fibers with at least two different resins in powder form, the first of said resins being characterized by hardening at 60.degree. C - 100.degree. C, and the second of said resins hardening at a temperature of 110.degree.C - 200.degree.C at elevated pressure to form a resin impregnated fiber sheet. This sheet is first heated at the lower temperature, and then cut to form shaped sections which are positioned in a mold and heated to the higher temperature with the application of pressure to form the stratified shaped fiber-reinforced plastic article.

REFERENCES:
patent: 3230287 (1966-01-01), Caron
patent: 3269977 (1966-08-01), Andres
patent: 3309444 (1967-03-01), Schueller
patent: 3356781 (1967-12-01), Sulewski
patent: 3361845 (1968-01-01), Watanabe
Frank, Def. Pub. of Serial No. 817,546, Def. Pub. T869,009.

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