Polyamide release film for sheet molding compound

Details Polyamide release film for sheet molding compound Polyamide release film for sheet molding compound

1980-12-22

1984-04-24

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

524514, 524497, 525183, 525184, 4284744, C08L 7700

Patent

active

044448295

ABSTRACT:
Disclosed is a polyamide film of low crystallinity suitable for use in the manufacture of sheet molding compound (SMC). The sheet is produced from a blend comprising a polyamide selected from the group consisting of polyepsiloncaprolactam, polyhexamethylene adipamide or mixtures thereof, and about 10 to 30 wt. %, based on the total weight of said blend, of a polyolefin compound, or copolymer thereof, such as ethylene-vinyl acetate copolymer. The film has a tear strength of at least about 400 grams in the longitudinal direction as measured by ASTM D-1004-66.

REFERENCES:
patent: 3093255 (1963-06-01), Mesrobian
patent: 3373223 (1968-03-01), Armstrong
patent: 3472916 (1969-10-01), Anspon
patent: 3516961 (1970-06-01), Robb
patent: 3626026 (1971-12-01), Fukumura
patent: 3873667 (1975-03-01), Petro
patent: 3923726 (1975-12-01), Benz
patent: 3971866 (1976-07-01), Johnson
Modern Plastic Encycl., vol. 54(10A), p. 364, 1977-1978 (McGraw-Hill).

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