Numerical Simulation of Dit'ferent Screw Elements in A Counter-Rotating Twin Screw Extruder and Their Application in Preparation of Flame-Retarded PP

doi:10.19491/j.issn.1001-9278.2008.03.019

China Plastics ›› 2008, Vol. 22 ›› Issue (03): 86-90.DOI: 10.19491/j.issn.1001-9278.2008.03.019

Numerical Simulation of Dit'ferent Screw Elements in A Counter-Rotating Twin Screw Extruder and Their Application in Preparation of Flame-Retarded PP

LUO Bing，LONG Zhi-bin，HE Min

College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2007-11-29 Revised:1900-01-01 Online:2008-03-26 Published:2008-03-26

Abstract

Abstract: the flow field of VCR and the triple screw elements in intermeshing counterrotating twin screw extruder was simulated using POLYFLOW software. }Che shear rate field, pressure field, average shear rate distribution, average pressure distribution, residence time distribution, and density distribution of max shear rate distribution were compared and studied. It was concluded that both elements possessed good mixing ability. Flame-retarded PP samples were extruded using extruders of two screw configurations with the two elements. The samples exhibited good mechanical properties with the determined values being agreement with simulation results.

Key words: intermeshing counter-rotating twin screw, normal triple screw element, mixing element, numerical simulation, flame-retarded polypropylene

LUO Bing, LONG Zhi-bin, HE Min. Numerical Simulation of Dit'ferent Screw Elements in A Counter-Rotating Twin Screw Extruder and Their Application in Preparation of Flame-Retarded PP[J]. China Plastics, 2008, 22(03): 86-90.

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Numerical Simulation of Dit'ferent Screw Elements in A Counter-Rotating Twin Screw Extruder and Their Application in Preparation of Flame-Retarded PP

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