Three different commercial PLA filaments were selected and printed with a commercial FDM machine, selecting a challenging 3D geometry with overhang printing. The filaments were thoroughly characterized by rheological, microscopic, and thermal techniques to explain the differences in the printing and tensile properties observed.
The printing parameters must be settled taking into account the polymer's viscosity, considering the printer is operating in the melt. Thus, to ensure the best bond quality between the adjacent filaments rheological and calorimetric investigation of the materials used in the printing are of crucial importance.
The findings of this paper support the conclusion that unmodified polymer filaments are not the best choice for FDM. The research should investigate further the optimization of the formulations to exploit the best performances of plastics used for FDM.Prof. Ignazio Blanco, PhD
Materials (Basel) 2018 Jul 11;11(7). Epub 2018 Jul 11.
Dipartimento DICAR (Department of Civil Engineering and Architecture), Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy.
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