TEMPERATURE RISE IN THE EXTRUSION OF HIGHLY VISCOUS COMPOSITE-MATERIALS

In this paper a model has been developed for the approximate evaluatio n of the temperature rise in the extrusion of filled plastic materials . The model developed in this paper considers the influence of thermal and rheological properties of extrudate, operating conditions of extr usion and geometry of screw channel on the temperature of extrudate. T he optimal parameters of screw channel in terms of productivity and te mperature build-up are discussed. The model was tested by experimental studies in which filled plastic material was produced using ground ru bber type particles dispersed in LDPE. The agreement the model predict ion and the experimental data is discussed.