Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1977-12-29
1979-12-11
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
156245, 264101, 428284, 428285, 428286, 428297, 428298, 428302, 428406, B32B 516
Patent
active
041784065
ABSTRACT:
This invention is directed to an improved process for making fiber reinforced articles comprising the steps of (a) applying a preformed plastic shell having the configuration of the desired article to a holding fixture therefore having sealing means at the peripheral edges thereof; (b) applying to the surface of the shell fibrous reinforcement material; (c) introducing to the reinforcement material a liquid plastic resin mixture; (d) applying to the surface of the resin mixture-containing reinforcement material a preformed plastic membrane having the configuration of the desired article; (e) sealing the peripheral edges of the membrane to the peripheral edges of the holding fixture to provide a molding system; (f) applying a vacuum to the molding system to compact the molding system and to draw said resin mixture throughout the reinforcement material; (g) hardening the resin mixture; and (h) separating the resulting article from said plastic membrane and said holding fixture. The invention is also directed to fiber reinforced articles made by the method of the invention.
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Bell James J.
Fein Michael B.
Johnson Lester E.
Rohm and Haas Company
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