Stampable reinforced thermoplastic polyester sheets

Details Stampable reinforced thermoplastic polyester sheets Stampable reinforced thermoplastic polyester sheets

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

043798012

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-time upon heating of one minute or less and the polymeric material layer inwardly of the outer polymeric material layers and contiguous to a surfacing mat layer having a shrinkage of less than 2% as determined in accordance with ASTM Method D-955; with all of the layers being integrally formed together and possessing a smooth surface, essentially free of fiber "read-through", 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. wherein T.sub.m is the melting point of the outer layers of the sheet.

REFERENCES:
patent: 4302499 (1981-11-01), Grisch

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