FOAM PIECES PRODUCTION METHOD Russian patent published in 1995 - IPC

FIELD: frothing polystyrol processing. SUBSTANCE: method provides for preliminary frothing of initially foaming wastes of frothing polystyrol of large and small fractions with particles size exceeding 3.0 mm and less than 0.4 mm in ration of 1 1. Produced granules are mixed with splintered wastes of foam plastic with following formation of mixture during heating. As splintered wastes of foam plastic they use wastes of polyvinyl chloride foam plastic with size of particles of 0.2 2.0 mm in amount of 20 30 mass Besides, mixture is additionally added with splintered wastes of polystyrol foam plastic with size of particles of 0.2 5.0 mm in amount of up to 20 mas EFFECT: improved technology. 2 cl, 1 tbl