“…The filament has the diameter of 1.75 mm. The main aims to use neat PLA filament was environmental friendly material, totally biodegradable after disposal as compared to the petroleum based polymers such as ABS, polypropylene and polyethylene [56] , [57] , [58] , [59] , [60] , [61] , [62] , [63] , [64] , [65] . In addition, lower thermal shrinkage during solidification was decisive in the choice of the first material tested compared with other possible materials such as ABS.…”