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Extrusion of polypropylene. Part II: Process analysis of the metering zone
Author(s) -
Lekakou C.,
Brandao J.
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10384
Subject(s) - extrusion , polypropylene , materials science , metering mode , isothermal process , polyethylene , extrusion moulding , high density polyethylene , plastics extrusion , low density polyethylene , mixing (physics) , mechanical engineering , composite material , mechanics , engineering drawing , engineering , thermodynamics , physics , quantum mechanics
This is a study of the extrusion of thermoplastics with special focus on the extrusion of polypropylene. A multidimensional numerical model is presented for computational simulations of the extrusion in the metering zone. The model contains a non‐isothermal analysis of the extrusion of non‐Newtonian melts in single‐screw extruders. The computer code developed is tested against an analytical solution and against literature data for the case of a high density polyethylene. Computer simulations are carried out for the extrusion of two grades of polypropylene at two different screw rotation speeds. Special attention is paid to the evaluation of variables of practical interest, such as residence times and measures of mixing quality.