Polyamide fiber reinforcement in thermoset polyurethane composit

Details Polyamide fiber reinforcement in thermoset polyurethane composit Polyamide fiber reinforcement in thermoset polyurethane composit

1985-12-23

1987-09-22

McCamish, Marion C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

264257, 428290, 4284235, B32B 2740

Patent

active

046955097

ABSTRACT:
Fiber-reinforced thermoset polyurethane composites display enhanced impact strength when sufficient amounts of a high tenacity aliphatic polyamide fiber characterized by a drawn denier of 4 to 8 denier per filament; a thermal shrinkage of up to about 14 percent; an elongation of from less than 28 percent; and a tenacity of at least 5.5, preferably at least 7 grams per denier, are incorporated into the composite. The process of producing such composites, including reinforced reaction injection molding processes, resin transfer molding processes, and casting process are improved by a reduction in equipment wear resulting from the incorporation of the specified polyamide fiber.

REFERENCES:
patent: 4233359 (1980-11-01), Mimura et al.
patent: 4302493 (1981-11-01), Tanaka et al.
patent: 4501790 (1985-02-01), Aizawa et al.

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