The effects on mechanical properties of PLA filaments after recycling

Fused deposition modeling (FDM) is a quick developing additive manufacturing (AM) technology because of its ability to construct functional practical elements with complicated geometries. AM enables the design of complex three-dimensional (3D) objects by depositing materials layer by layer. 3D printing has become a popular and quickly developed manufacturing technology today.The purpose of this study is to review how using a 3D printer can create samples and recycle PLA and how the mechanical properties of PLA change with repeated experiments.The study is passed on an experiment that was done to analyze the mechanical properties of PLA before recycling and after recycling and then review if there are any changes in mechanical properties after recycling. To perform the experiment, 8 test samples were printed in which tensile tests were performed on the respective samples. After conducting tests, the samples were recycled into filaments again, and then printed in the 3D printer. The same printing parameters were used again when printing new samples to ensure that properties are not affected by other parameters. The results of the experiment showed that tensile strength decreased by 11% while stiffness increased by 7%. In conclusion, PLA is recyclable and reusable but small mechanical properties changes during recycling