additive manufacturing, recycling
Plastic waste is a critical worldwide problem that impacts additive manufacturing (AM). Extensive research has explored how plastic waste in AM can be reduced by recycling prints into new filament, with varying success. An alternative to filament-based extrusion is “fused granule fabrication” (FGF), which extrudes from pellets or granules. This method is often used for large area additive manufacturing (LAAM) of polymers. This paper expands upon the knowledge base from previous research on LAAM and examines the extent to which PETG can be recycled and reprinted through the same FGF tool without significant loss to its material properties. The metric used for comparing material properties is tensile testing along the direction of deposition. Recycled material was granulized, filtered, and dehydrated. This resulted in effective printing of 100% recycled PETG, with recycled samples demonstrating 83% of the tensile strength of virgin PETG.
Original Publication Citation
Thompson, N. and Weaver, J. M., “Closed Loop Recycling of PETG in Fused Granule Fabrication Additive Manufacturing Processes,” Proc. 33rd Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, Solid Freeform Fabrication Symposium.
BYU ScholarsArchive Citation
Thompson, Neil and Weaver, Jason, "Closed Loop Recycling of Low Friction Polymers in Fused Granule Fabrication Additive Manufacturing Processes" (2022). Faculty Publications. 5871.
Solid Freeform Fabrication Symposium
Ira A. Fulton College of Engineering
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