Method of producing certain transparent adhesive laurolactam cop

Details Method of producing certain transparent adhesive laurolactam cop Method of producing certain transparent adhesive laurolactam cop

1975-11-17

1978-03-07

Cannon, J.C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156246, 156277, 260 37N, 260 78L, 260 78S, 264176R, 264213, 264216, 264331, 428200, 428204, 428207, 428246, 428262, 428302, 428349, 15624424, B29B 302, B32B 2708, B32B 2712, B32B 2734

Patent

active

040781135

ABSTRACT:
A method for producing transparent or pigmented films from resin particles, of a particular class of laurolactam containing polyamide copolymers and/or terpolymer, said film suitable as a coating and/or heat melt adhesive for fabrics and other materials. The method comprises drying the resin while in the solid state until it is substantially water free, extruding the dried resin particles while heating to a temperature sufficient to volatilize and drive off unreacted monomer contaminants, but below the degradation temperature of the resin, expelling the molten resin from the extruder onto heated, sheeting dye means to form a film therefrom, dropping the film onto a substrate backing material, and running the film and backing through a roller to achieve a uniform and controlled thickness.

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