FIELD: production of foamed materials with texturized surface. SUBSTANCE: method for production of foamed polyvinylchloride material includes molding of powdery emulsion or microsuspension polyvinylchloride, or mixture of powdery suspension or emulsion polyvinylchloride preliminarily mixed with sodium alkylmonosulfonate with formation of salient pattern on the surface, foaming at temperature up to 300 C and molding of obtained foamed material at pressure to smooth salient pattern (versions). According to the second version, salient pattern may also be formed by foaming at heating in nonuniform temperature field with use of sectional heaters containing alternating zones of more intensive heating. EFFECT: higher efficiency. 6 cl
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Authors
Dates
1995-10-10—Published
1993-01-25—Filed