About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Shelf Life of Polyamide 12 (PA2200) Laser Sintering Powder |
Author(s) |
Ivo Kletetzka, Helge Klippstein, Ilknur Sural, Hans-Joachim Schmid |
On-Site Speaker (Planned) |
Ivo Kletetzka |
Abstract Scope |
It is a very well-known fact in the laser sintering community that polyamide powders age during processing. Therefore, the recycling rate of used powder is typically limited to around 50 % and it has to be mixed with new, virgin powder, before the next build job can be started. The aging of the polymer powder between its production and processing, in contrast, has hardly been investigated so far and has received little attention. In order to investigate the effects of storage time, thermal and rheological tests were carried out on two batches of PA2200 powder, which had been stored for 5 and 6.5 years respectively. Compared to freshly produced powders, aging effects were clearly visible. Furthermore, test specimens were built from the stored powder batches and the part properties were compared with those of reference powder. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |