Process Behavior of Special Mixing Elements in Twin-screw Extruders

Abstract : This work was aimed at studying the overall, partial, and local residence time distributions (RTD); overall, partial and local residence revolution distributions (RRD) and overall, partial and local residence volume distributions (RVD) in a co-rotating twin screw extruder, on the one hand; and establishing the relationships among them, on the other hand. Emphasis was placed on the effects of the type and geometry of mixing elements (a gear block and various types of kneading elements differing in staggering angle) and process parameters on the RTD, RRD and RVD. The overall and partial RTD were directly measured in-line during the extrusion process and the local ones were calculated by deconvolution based on a statistical theory. The local RTD allowed comparing the mixing performance of mixing elements. Also it was confirmed both experimentally and theoretically that specific throughput, defined as a ratio of throughput (Q) over screw speed (N), controlled all the above three types of residence distributions, be they local, partial or overall. The RRD and RVD do not provide more information on an extrusion process than the corresponding RTD. Rather they are different ways of representing the same phenomena.
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International Polymer Processing, Carl Hanser Verlag, 2001, 16 (4), pp.341-350. 〈10.3139/217.1664〉
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https://hal.univ-lorraine.fr/hal-01629325
Contributeur : Sandrine Hoppe <>
Soumis le : lundi 6 novembre 2017 - 14:29:05
Dernière modification le : jeudi 11 janvier 2018 - 06:25:27

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Xian-Ming Zhang, Lian-Fang Feng, Sandrine Hoppe, Guo-Hua Hu. Process Behavior of Special Mixing Elements in Twin-screw Extruders. International Polymer Processing, Carl Hanser Verlag, 2001, 16 (4), pp.341-350. 〈10.3139/217.1664〉. 〈hal-01629325〉

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