Pengaruh Diameter Nozzle dan Ketebalan Layer pada Proses 3D Printing Terhadap Kekuatan Lentur dan Nilai Kekerasan Filamen PET

Abstrak

This researched investigates the mechanical properties of recycled polyethylene terephthalate (PET) filament for 3D printing, focusing on the effects of nozzle diameter and layer thickness. The research addresses environmental issues caused by PET bottle waste and evaluates recycling as a sustainable solution in additive manufacturing. Recycled PET filament was produced from discarded bottles and printed using nozzle diameters of 0.4 mm and 0.8 mm, with layer thicknesses of 0.2 mm and 0.36 mm. Mechanical tests, including bending, hardness number, were conducted according to ASTM standards. The results showed that a larger nozzle diameter significantly enhanced mechanical performance. Specimens printed with a 0.8 mm nozzle exhibited higher bending strength, elastic modulus, hardness compared to those printed with a 0.4 mm nozzle. These findings indicate that optimizing printing parameters improves structural performance and supports sustainable material utilization in additive manufacturing applications.

Kata kunci

• 3D printing
• Mechanical Properties
• Recycled PET