Design and scale-up of a semi-industrial downer-reactor for the rounding of irregular polymer particles

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Details zur Publikation

Autor(en): Peukert W, Sachs M, Schmidt J, Wirth KE
Herausgeber: 2016 AIP Publishing LLC
Verlag: American Institute of Physics Inc.
Jahr der Veröffentlichung: 2016
Band: 1713
Tagungsband: AIP Conference Proceedings 1713
Seitenbereich: 070003-1 - 070003-5
ISBN: 9780735413603
Sprache: Englisch


Abstract


The recent development of rapid prototyping technologies towards additive manufacturing reveals some major drawbacks of processes such as laser beam melting (LBM). This contribution focuses on the lack of suitable polymer material with a fine particle size and good flowability. Polymer particles obtained by a wet grinding process 1 are treated in a heated downer reactor. This treatment changes the particles' morphology from a chiselled state towards a spherical form by surface tension forces in a molten state 2 and leads to an improved flowability. To reach the required amount of rounded polymer powder, a downer reactor in semi-industrial scale has been established and will be characterized in this article. For the purpose of particle rounding it is necessary to avoid contact of molten particles with each other and with the hot reactor walls. Furthermore, the heat distribution has been investigated as one of the key parameters of the process. Finally, a proof of concept by rounding wet grinded PBT material was successfully conducted. The product was examined to obtain data about a change in particle size and flowability.



FAU-Autoren / FAU-Herausgeber

Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Sachs, Marius
Professur für Partikeltechnik
Schmidt, Jochen Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Wirth, Karl-Ernst Prof. Dr.-Ing.
Professur für Partikeltechnik


Zitierweisen

APA:
Peukert, W., Sachs, M., Schmidt, J., & Wirth, K.-E. (2016). Design and scale-up of a semi-industrial downer-reactor for the rounding of irregular polymer particles. In 2016 AIP Publishing LLC (Eds.), AIP Conference Proceedings 1713 (pp. 070003-1 - 070003-5). Jeju Island Korea, KR: American Institute of Physics Inc..

MLA:
Peukert, Wolfgang, et al. "Design and scale-up of a semi-industrial downer-reactor for the rounding of irregular polymer particles." Proceedings of the 31st International Conference of the Polymer Processing Society, PPS 2015, Jeju Island Korea Ed. 2016 AIP Publishing LLC, American Institute of Physics Inc., 2016. 070003-1 - 070003-5.

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