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Qualitative analysis of twin‐screw extruder performance in stabilization pelletizing of HDPE resins
Author(s) -
Harlin Ali
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.10427
Subject(s) - materials science , high density polyethylene , plastics extrusion , composite material , polyethylene , extrusion , shear (geology) , homogenization (climate) , mechanical engineering , engineering , biodiversity , ecology , biology
Two twin‐screw extruders of different size and centerline distance C L were compared. To understand better the performance of the extruders, the operation points were optimized for an HDPE (high‐density polyethylene) film product, and the performance of screw configuration was qualitatively analyzed with some numerical methods at the operation points. The machinery with narrower C L was found to have lower average shear rate, higher conveying capacity, and more channeling in the conveying flow. That means also a need for severe processing in the kneading zone. The extruder with narrow C L had a narrow operation window, and that made it more difficult to combine homogenization and degradation of the product.