Christopher, S.I. (2026) “Study on Optimization of Extrusion Process for Polypropylene/Ultra High Molecular Weight Polyethylene as Fused Filament Fabrication (FFF) 3D Printer Material”, Progress in Engineering Application and Technology, 7(1), pp. 490–497. Available at: https://periodical.uthm.edu.my/index.php/peat/article/view/22880 (Accessed: 15 August 2026).