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采用熔融浸渍工艺生产连续纤维增强热塑性复合材料,纤维预分散至关重要。结合现有机械分散装置,根据纤维束在高压静电场受静电场力的原理,设计并引入高压静电场分丝装置,对纤维束进行二次分散。结果显示,经过高压静电场分丝,促进了纤维束分散和纤维单丝之间的均匀性,改善了连续玻璃纤维增强聚丙烯(GF/PP)复合材料预浸料纤维和聚合物表面结合,降低了纤维分丝过程中的磨损和断裂,使得通过此法制得的GF/PP复合材料预浸料的力学性能得到显著提升。实验表明,当静电场上下极板之间距离为20cm、高压静电场电压30k V时,GF/PP复合材料预浸料力学性能最优。
The use of melt impregnation process to produce continuous fiber reinforced thermoplastic composites, fiber pre-dispersion is crucial. Combined with the existing mechanical dispersion device, according to the principle that the fiber bundle is subjected to electrostatic field in the high voltage electrostatic field, the high voltage electrostatic field split device is designed and introduced to make secondary dispersion of the fiber bundle. The results show that, after high voltage electrostatic field shredding, the uniformity of the fiber bundle dispersion and the fiber monofilament is promoted, the surface bonding of the continuous glass fiber reinforced polypropylene (GF / PP) prepreg fiber and the polymer surface is improved, Reduce the wear and tear of the fiber during the spinning, so that the mechanical properties of the GF / PP composite prepreg prepared by the method are obviously improved. Experiments show that when the distance between the upper and lower plates of the electrostatic field is 20cm and the voltage of the high voltage electrostatic field is 30kV, the mechanical properties of the GF / PP composite prepreg are the best.