Additive manufacturing, specifically 3D printing (3DP), is a trend of great relevance in industry 4.0. The objective of this work is presented as a systematic review of the available literature to define the main methods and standards towards analyzing the material properties, 3D printing filament extrusion variables, and polylactic acid (PLA) recycling. The research used the methodology of a mixed explanatory sequential review based on studies already published in books and journals. These data have relevant information to serve as a guide for the recycling, extrusion, and 3D printing of the PLA.
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