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Proceeding Paper

Technical Evaluation of Mechanical Recycling of PLA 3D Printing Wastes †

1
Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, 28006 Madrid, Spain
2
Grupo de Investigación Polímeros Caracterización y Aplicaciones, Universidad Politécnica de Madrid, 28006 Madrid, Spain
3
Facultad de Óptica y Optometría, Universidad Complutense de Madrid, 28037 Madrid, Spain
*
Author to whom correspondence should be addressed.
Presented at the First International Conference on “Green” Polymer Materials 2020, 5–25 November 2020; Available online: https://sciforum.net/conference/CGPM2020.
Proceedings 2021, 69(1), 19; https://doi.org/10.3390/CGPM2020-07187
Published: 4 November 2020
The importance of 3D printing is growing rapidly. A recent example of this increasing importance involves the fight against the Covid-19 pandemic, in which 3D printing has helped to overcome the shortage of critical supplies. However, 3D printing generates large amounts of plastic waste that could pose an environmental problem, thus making it necessary to find methods for the correct management of such wastes. The combination of additive manufacturing and distributed mechanical recycling can contribute to the development of a more circular economy. The main goals of this work were to characterize the poly(lactic acid) (PLA) wastes generated in 3D printing processes and evaluate the effect of their heterogeneity on the technical feasibility of mechanical recycling. Two PLA 3D printing wastes were used: waste coming from a well-known PLA grade, and a mixture of PLA 3D printing residues coming from an association of coronamakers in Madrid. Recycled material obtained from the waste of a well-known PLA grade shows good properties, similar to those for non-used material. However, the recycled material obtained from mixed PLA waste shows lower viscosity values, higher crystallization ability and less transparency. These results highlight that special attention should be paid to the sorting and characterization of the 3D wastes, to obtain recycled materials with good properties.
Keywords: poly(lactic acid); 3D printing; mechanical recycling; plastic waste; circular economy poly(lactic acid); 3D printing; mechanical recycling; plastic waste; circular economy
MDPI and ACS Style

Moreno, E.; Beltrán, F.R.; Arrieta, M.P.; Gaspar, G.; Muneta, L.M.; Carrasco-Gallego, R.; Yáñez, S.; Hidalgo-Carvajal, D.; Orden, M.U.d.l.; Urreaga, J.M. Technical Evaluation of Mechanical Recycling of PLA 3D Printing Wastes. Proceedings 2021, 69, 19. https://doi.org/10.3390/CGPM2020-07187

AMA Style

Moreno E, Beltrán FR, Arrieta MP, Gaspar G, Muneta LM, Carrasco-Gallego R, Yáñez S, Hidalgo-Carvajal D, Orden MUdl, Urreaga JM. Technical Evaluation of Mechanical Recycling of PLA 3D Printing Wastes. Proceedings. 2021; 69(1):19. https://doi.org/10.3390/CGPM2020-07187

Chicago/Turabian Style

Moreno, Eduardo, Freddys R. Beltrán, Marina P. Arrieta, Gerald Gaspar, Luisa M. Muneta, Ruth Carrasco-Gallego, Susana Yáñez, David Hidalgo-Carvajal, María U. de la Orden, and Joaquín Martínez Urreaga. 2021. "Technical Evaluation of Mechanical Recycling of PLA 3D Printing Wastes" Proceedings 69, no. 1: 19. https://doi.org/10.3390/CGPM2020-07187

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