Steady feeding improves quality of calendered PVC film

摘要

BUSS has produced a new version of its Quantec kneader compounding machine for direct feeding to PVC film calenders.It incorporates an intermittent cutting device to produce evenly-sized pieces of PVC which don't stick together.Shutdown time for opening,cleaning and closing has been halved to 30 to 50 minutes.Melt quality meets high demands for homogeneity,absence of pin-holing,colour uniformity and de-gassing,says Buss.The machine has no additional discharge screw as the length of the mixing and kneading section,normally 10 to 11 D,has been extended by 4 to 5 D.The additional space serves for de-gassing and building up the necessary discharge pressure with minimum energy input.