About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Powder Bed Fusion of Polymers with Ultraviolet Light Emitting Diode Energy Sources |
Author(s) |
Krzysztof Nauka, Michelle Niu, Emre Discekici, Aja Hartman, Paul Olubummo |
On-Site Speaker (Planned) |
Krzysztof Nauka |
Abstract Scope |
Powder bed 3D printing of polymers frequently uses broadband near-infrared (NIR) emitters and selectively printed fusing agents with absorption spectrum matching the emission of selected IR energy source. However, due to few available NIR absorbers that can be formulated into printable agent, printed 3D parts often have unwanted color limiting their applications. Shifting the emitter spectrum to a narrow, near-ultraviolet band (NUV LEDs; wavelength > 350 nm) provides more printable absorber candidates while minimizing the potential UV-induced damage of polymer. Choice of the printable absorber span from inorganic metal oxides (TiO2, ZnO, etc.) to organic absorbers that may include commercial UV absorbing ingredients used in paints, vitamins, food derivatives, cosmetic and pharmaceutical components. Some of the absorbers, being colorless or white, enable printing parts with the original polymer powder color or white base for desired coloring of the printed objects. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |