Embossing of foamable plastisols on dry blend layers

Details Embossing of foamable plastisols on dry blend layers Embossing of foamable plastisols on dry blend layers

1981-11-12

1983-08-30

Van Balen, William J.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 52, 264DIG82, 428159, B29C 2300, B29H 720

Patent

active

044016115

ABSTRACT:
Chemically embossed foamed plastic sheet, and method of producing it, which sheet is formed of a base layer of fused resin particles, such as PVC, randomly intermixed with particles of a foaming inhibitor, especially benzotriazole; and an upper layer of foamed plastic, such as PVC, having irregularly shaped, lump-like elevated areas interspersed with irregularly shaped, trough-like depressions. The depressions result from the inhibiting action of foaming inhibitor particles in the base layer upon the blowing agent used for expanding the foamed layer. In the Example, the foamed layer is pigmented PVC with a gloss surface, lying in rectangular patches upon the base layer; and the base layer is fused pigmented PVC intermixed with particles of benzotriazole giving it a grainy texture.

REFERENCES:
patent: 3293094 (1966-12-01), Nairn et al.
patent: 3905849 (1975-09-01), Bomboire
patent: 4012248 (1977-03-01), Rump et al.
patent: 4068030 (1978-01-01), Witman
patent: 4198456 (1980-04-01), Adams
patent: 4207368 (1980-06-01), Schneider et al.
patent: 4234641 (1980-11-01), Thompson et al.
patent: 4278483 (1981-07-01), Mansolillo

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