Compacted sheet molding compound

Details Compacted sheet molding compound Compacted sheet molding compound

1982-08-26

1984-10-02

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156 624, 156276, 264175, 264257, 264280, 428285, 428290, 428297, 428323, 428325, 428402, 428406, 428407, 428408, 428902, B32B 516

Patent

active

044748450

ABSTRACT:
A method is provided for compacting viscous polymeric molding compositions preparatory to compression molding to substantially improve the physical properties of articles molded therefrom. Suitable compositions include those filled with a geometric reinforcing particulate filler that are flowable and thermosettable when compression molded. The method comprises forming a slab of a said filler composition and thereafter reducing its thickness by passing it between spaced-apart pairs of compression means. The pair members of the means are spaced apart to ultimately substantially reduce its thickness. The method yields unexpected improvements in the tensile strength, isotropy and surface characteristics of articles compression molded from the compounds.

REFERENCES:
patent: 3903343 (1975-09-01), Pfaff
patent: 4065597 (1977-12-01), Gillespie
patent: 4098943 (1978-07-01), Degginger et al.
patent: 4201823 (1980-05-01), Russell
patent: 4302499 (1981-11-01), Grisch
patent: 4379802 (1983-04-01), Weaver et al.

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