Process for continuous preparation of synthetic resin plates hav

Plastic and nonmetallic article shaping or treating: processes – Random variegated coloring during molding

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264 75, 264171, 264216, 264245, 264347, 4251311, 425224, 425371, B29C 3920

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047103337

ABSTRACT:
Synthetic resin plates having an irregular flow pattern of different colors are prepared by continuously polymerizing polymerizable materials in a polymerization zone defined by confronting surfaces of two confronting and running endless belts and gaskets held between the confronting surfaces of the belts. Polymerizable materials of different colors are supplied in the polymerizable material supply region close to the upstream end of the polymerization zone by a plurality of supply means, each of which includes at least one polymerizable material supply opening to the polymerizable material supply region. The supply means are arranged in such a manner that they are spaced from one another in the direction of travel of the belts. The supply of the polymerizable material is carried out while at least one of the supply means is reciprocated in the width direction of the belts, and the colors of the colored polymerizable materials supplied from at least two of the supply means are made different from each other or the colored polymerizable material supplied from at least one of the supply means is formed into a laminar flow composed of a plurality of polymerizable materials differing in color.

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