| About this Abstract |
| Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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| Symposium
|
Broad Issues in AM
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| Presentation Title |
Characterization of Particles and Gases Released from Large-format Additive Manufacturing Machines during Extrusion of Multiple Polymers and Machining |
| Author(s) |
Lauren N. Bowers, Stephen Martin, Alycia Knepp, Austin Schmidt, Andrew Bader, Aleksandr Stefaniak |
| On-Site Speaker (Planned) |
Lauren N. Bowers |
| Abstract Scope |
Polymer extrusion on Large-Format Additive Manufacturing (LFAM) machines releases particles and gases; however, the characterization of these emissions has not been studied. Emissions during the extrusion of six different polymers on two LFAM machines were collected and characterized on filters and substance-specific media. Wipe samples of work surfaces and printed parts were collected and analyzed for bisphenol A and S (BPA, BPS). Filter samples showed low concentrations of metals detected during printing with all polymers (maximum = 1.6 mg/m3 for iron). Low levels of gases were detected, including respiratory irritants (phenol), asthmagens (caprolactam), and carcinogens (formaldehyde) in air. Work surfaces and printed parts were contaminated with low levels of BPA (<8-587 ng/100 cm2) and BPS (<0.22-2.5 ng/100 cm2). All extruded polymers released varying levels of chemicals that could influence air quality and surface contamination, which emphasizes the importance of health and safety practices to minimize exposures and risks. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |