Preparation of Continuous Glass Fiber Reinforced Polylactic Acid by Means of a Melt Impregnation Method and Application as a 3D Printing Consumable

摘要

3D printing of continuous fiber reinforced composites (CFRC) has become a trend. However, the continuous glass fiber reinforced filament (CFRF) is mainly CFRF/PA for 3D printing. there are few studies on CFRF/PLA with PLA as matrix and continuous fiber as reinforcement. In this paper, continuous glass fiber reinforced filament/PLA (CGFRF/PLA) which can be used in 3D printing are prepared by molten impregnation process with PLA as matrix material and continuous glass fiber as reinforcement. Orthogonal experiment method was used to study the process parameters of CGFRF/PLA. The results show that when CGFRF/PLA is prepared, the parameters are set as the cavity die temperature 215°C, the outlet die temperature 212°C, the sizing die temperature 202°C. And the winding speed of the composite material is 7r/min. The diameter of the composite wire we get is 0.45 mm with the roundness error is 0.01 mm. The roughness is 18um, and the bending degree is 25.8%. At the same time, this study can provide ideas for the preparation of more multiple CFRF.