Optimizing 3D Printing Process Parameters for the Tensile Strength of Thermoplastic Polyurethane Plastic

Three-dimensional printing (3D printing) is one of the most common methods applied in rapid prototyping for manufacturing, medical, and education applications. In addition to the shape design and materials, the mechanical quality of 3D printing products also depends on printing parameters such as temperature, infill angle, infill density, and layer thickness. In this study, the mechanical characteristics of thermoplastic polyurethane (TPU) polymer are tested by examining these parameters. The Taguchi method is employed to design, analyze, and optimize the mechanical properties. To achieve maximum tensile strength, the parameters that should be applied are 210 degrees C, 45 degrees infill angle, 100% infill density, and 0.1 mm thickness. Moreover, optimal parameters for maximum elastic modulus are 240 degrees C, infill angle 90 degrees, 100% infill density, and 0.18 mm thickness. Finally, printing should be performed at 210 degrees C, with an infill angle of 45 degrees, 15% infill density, and 0.1 mm thickness to achieve the highest elongation at break value. Scanning electron microscope (SEM) images of the sample reveal the stacking structure and the different breaking mechanisms between infill angles of 45 and 90 degrees.

Automated summary

This study examines the mechanical characteristics of thermoplastic polyurethane (TPU) polymer by testing parameters such as temperature, infill angle, infill density, and layer thickness. The Taguchi method is used to design, analyze, and optimize the mechanical properties. The study provides optimal parameter combinations for achieving maximum tensile strength, elastic modulus, and elongation at break value.