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The previous study on the dynamic processing characteristics of co-rotating twin-screw extruder based on a visible technique (which employed a “transparent” extruder) performed by the authors Wong et al. [1 and 2] had enabled a quantitative treatment to be carried out in the present paper on the melting behaviour of polymer during an extrusion process. The qualitative analysis performed previously [1] had led to the development of a melting model which was capable of revealing some of the fundamental melting behaviour. The model also enabled the determination of the length of screw required for completing melting (Z r ). Melting characteristics in terms of effects of solid feeding rate, temperature, screw speed and channel depth on the predicted Z r  were discussed to further our understanding on melting performance of polymer melt in intermeshing corotating twin-screw extruder.

Prediction of Screw Length Required for Polymer Melting and Melting Characteristics