Stock material or miscellaneous articles – Structurally defined web or sheet – Physical dimension specified
Patent
1982-04-21
1983-04-12
McCamish, Marion
Stock material or miscellaneous articles
Structurally defined web or sheet
Physical dimension specified
428283, 428285, 428288, 428325, 428328, 428331, 428341, 428480, 428482, 428483, B32B 1500, B32B 1700
Patent
active
043798020
ABSTRACT:
Stampable sheet of reinforced thermoplastic material having a plurality of layers of polymeric material and a plurality of layers of fibrous reinforcing material alternating with the layers of polymeric material, the polymeric material layers having minimum crystallization half-times upon heating of one minute or less with the fifth layer of the sheet being polymeric material having a shrinkage of less than 2% as determined in accordance with ASTM Method D-955, and the first or outer layer and the third layer of the sheet being polymeric material layers having about 5 to about 50 weight percent fillers; with all of the layers being integrally formed together and possessing a smooth surface, essentially free of fiber "read-through", and having more uniform reinforcement in the sheet, and of the type required of exterior automotive-type appearance parts; and a stamped sheet formed from the stampable sheet and having a heat deflection temperature under 264 psi. load greater than T.sub.m -50.degree. C., where T.sub.m is the melting point in the outer layers of the sheet.
REFERENCES:
patent: 4302499 (1981-11-01), Grisch
Seymour Robert W.
Weaver James C.
Dunn Malcolm G.
Eastman Kodak Company
McCamish Marion
Reece III Daniel B.
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