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New advances in screw designs and mixing sections have allowed processors to take advantage of new resins, higher production rates, and improved product quality. With the advances in new material formulations, additives and fillers, the screw design must be able to fully melt and disperse the additives in the polymer matrix without destroying the properties from excess shear. This paper will present data on the melting performance of a new screw design with a unique flight geometry that maximizes the conductive melting mechanism (low shear) in the screw channel. A comparison is made between the melting, pumping and mixing characteristics between a standard Energy Transfer screw (ET) and a new Variable Barrier Energy Transfer screw (VBET).
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Performance Evaluation for a Single Screw Extruder with Improved Conductive Melting, 2003 PLACE Conf