PROCESS FOR THE MANUFACTURE OF PLASTICS POWDERS ON THE BASE OF POLYVINYL CHLORIDE OR VINYL CHLORIDE COPOLYMERIZATE

摘要

The method for preparing synthetic powders based upon polyvinyl chloride or vinyl chloride copolymers by spray drying the polymer dispersions is improved by using single material nozzles with atomizing pressures of about 550 to 1000 bars where a bar is a C.G.S. unit of pressure equal to 750 mm of Hg.