About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Presentation Title |
Halogen-free Flame-retardant Powder Materials for Laser Sintering: Evaluation and Process Stability Analysis |
Author(s) |
Fabian Neitzel, Ivo Kletetzka, Hans-Joachim Schmid |
On-Site Speaker (Planned) |
Fabian Neitzel |
Abstract Scope |
The high flammability of components manufactured by laser sintering (LS) using standard polyamide 12 (PA12) powder still severely restricts their use in industries such as electronics, aviation, and transportation. A key factor for the further establishment of laser sintering is the expansion of the material portfolio with, for example, refreshable and halogen free flame-retardant powder materials. Accordingly, various halogen-free flame-retardants are investigated in this work and evaluated with respect to their use in LS. First, their decomposition behavior and mode of action are examined. Subsequently, the additives are dry blended with PA12 to investigate properties relevant for LS, such as particle morphology, thermal behavior and melt viscosity. In the next step, test specimens for UL94 vertical flame-retardancy tests in the LS process are produced from the blends. Finally, the process stability of the process-aged powder blends is investigated by again examining the thermal behavior and melt viscosity. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |