Thick section compression molded composites

Details Thick section compression molded composites Thick section compression molded composites

1977-12-19

1980-03-04

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264236, 264237, 264331, 264347, 264348, B29C 2500

Patent

active

041917189

ABSTRACT:
Mechanical properties of compression molded composites having thick sections and made from molding compounds comprising thermosetting resin and reinforcing fiber in a thickened dispersion are improved by a preheating stage and mold cycle times that are longer than the time necessary to reach the highest peak exotherm temperature of the composite during molding. Slow post cooling allows for development of properties especially when mold opening times are shorter than that required for removal of all thermal gradients.

REFERENCES:
patent: 2288321 (1942-06-01), Nordlander et al.
patent: 2579596 (1951-12-01), Minter et al.
patent: 2713697 (1955-07-01), Willcox
patent: 3856885 (1974-12-01), Furuya et al.
Modern Plastics Encycloped. 1970-1971, vol. 47, No. 10A, Oct. 1970, pp. 466, 471, 472.
Bjorksten, Polyesters and Their Applications, Reinhold Pub. Corp., New York, 1956, pp. 102, 103, 108 and 109.

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