Study On The Downblow Moulding Technology For The Pvc Shrinkable Film

According to comparing different bubble film technology for the PVC shrinkable film, a new concept was put forward that the molding technology can relatively be divided into one-stage processing and two-stage processing.The down-bubble method can relatively realize the one-stage processing. The one-stage processing has many advantages over the two-stage processing.This article expounds the down-blow bubble film technology for the PVC shrinkable film with the main two parts of manufacturing principle and molding technology.The one-stage processing deepens the manufacturing principle, simplifies the manufacturing process and have a easy operation. In the part of molding technology, the formula device, blending raw material, making plastic pellet and the bubble film technology had been analyzed and summed up. Expect to realize a digital operation and the high manufacturing efficiency.The abnormal conditions, reasons and dealing methods from the blow-molding processing had systematically been summed up.In the part of test research, it is discussed that the effect of different resin on heat-sensitivity of the shrinkable film , the effect of MBS on mechanical properties, transparency and processability of the material and the improvement of ACR on impact strength , processability of the material.