The effect of different hardness of Thermoplastic Polyurethane (TPU) on the printability of Acrylonitrile-Butadiene-Styrene (ABS) filaments in FDM ۳D printing technology

۳D printing, also known as additive manufacturing or rapid prototyping, is another term for layer-by-layer production of parts based on the principle of layered construction. Fused Deposition Modeling (FDM) is one of the most widely used processes for additive manufacturing (AM) of initial samples. ABS is one of the most common polymers used for preparing filaments for FDM ۳D printers. Some of the interesting features of this polymer in the ۳D printing industry can make it the most prominent material for ۳D printing. One of the significant drawbacks of this material for use in ۳D printing is that it is highly susceptible to thermal shrinkage and warping. Many elastomeric materials compatible with the FDM process are based on thermoplastic polyurethane (TPU). Different hardnesses of TPU have different structures and mechanical properties. In this study, the effect of blending different hardnesses of TPU with ABS on the amount of shrinkage and warping of filaments used in ۳D printing technology is investigated. According to the results, adding TPU to ABS base filaments, generally reduces warping and shrinkage and increases filament adhesion to the bed. Among the samples prepared, in general, sample number ۲ with a hardness of ۷۵ A had the lowest warpage and shrinkage rate

کلیدواژه ها:

ABS ، hardness ، TPU ، warpage ، shrinkage.