Process Behavior of Special Mixing Elements in Twin-screw Extruders
| Autor: | G. Scheel, J. Hofmann, M. Mours, Helmut Potente, Th. Winkelmann, Karsten Kretschmer, M. Senge |
|---|---|
| Přispěvatelé: | School of Chemistry and Materials Science, Shanxi Normal University, State Key Lab Chem Eng Zhejiang Univ, Zhejiang University, Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2001 |
| Předmět: |
010407 polymers
Modular structure Materials science Polymers and Plastics General Chemical Engineering Process behavior Plastics extrusion Mechanical engineering 02 engineering and technology 021001 nanoscience & nanotechnology Residence time distribution 01 natural sciences Industrial and Manufacturing Engineering [SPI.MAT]Engineering Sciences [physics]/Materials 0104 chemical sciences [CHIM.POLY]Chemical Sciences/Polymers Materials Chemistry [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering 0210 nano-technology Mixing (physics) |
| Zdroj: | International Polymer Processing International Polymer Processing, 2001, 16 (4), pp.341-350. ⟨10.3139/217.1664⟩ |
| ISSN: | 2195-8602 0930-777X |
| DOI: | 10.3139/217.1664 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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