METHOD FOR PRODUCING POLYSTYRENE FOAM PARTICLES WITH A HIGH DENSITY.

摘要

The invention relates to a method for producing polystyrene foam particles with a bulk density ranging between 40 and 400 g/l by the extrusion of a polystyrene melt, containing carbon dioxide and/or water as the expansion agent, through a nozzle and by underwater granulation. According to the invention, the underwater granulation is carried out at a pressure ranging between 1 and 30 bar.