Conical twin extrusion screw design can be very sensitive and differ from various PVC formulations. Studying how to choose conical twin screw design is important in your PVC extrusion process.
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Definately because due to gap created between screw and inner surface of barrel material does no get masticated properly. Impurity and moisture does not convert into the vapour and remain in marerial therfore moisture will remain in end product. Hope you understand.
