A novel manufacturing technique called long-fiber-reinforced thermoplastic (LFT) is proposed to produce continuous flexible composite carbon fibers and fabrics. During the process, a polyester hot-melt adhesive (MPTU) is added to thermoplastic polyurethane (TPU) to form TPU blends that can improve the interfacial-bonding level. The TPU blends are extruded to enwrap carbon fibers and form an outer layer. The effects of the TPU blends on the composite are examined to determine the optimal parameters. At a TPU/MPTU ratio of 85/15 wt%, the blend exhibits good miscibility and the fiber tows show the optimal cluster effect and knot properties. Consequently, the specific strength of the optimal composite carbon fibers reaches 349.27 MPa·g⁻¹·cm³. The resulting of composite carbon fabrics shows flexibility, and an average electromagnetic-interference shielding efficiency of 28.35 dB. Overall, this study reveals that LFT technique is an effective and novel method of developing carbon fiber-reinforced thermoplastics.

提出了一种称为长纤维增强热塑性塑料（LFT）的新颖制造技术，以生产连续柔性复合碳纤维和织物。在此过程中，将聚酯热熔胶（MPTU）添加到热塑性聚氨酯（TPU）中，以形成可改善界面键合水平的TPU共混物。挤出TPU共混物以包裹碳纤维并形成外层。检查TPU共混物对复合材料的影响，以确定最佳参数。在TPU / MPTU比为85/15 wt％时，共混物显示出良好的混溶性，并且纤维束显示出最佳的簇效应和结特性。结果，最佳复合碳纤维的比强度达到349.27 MPa·g ^-1 ·cm ^3。。复合碳纤维织物的合成物显示出柔韧性，平均电磁干扰屏蔽效率为28.35 dB。总体而言，这项研究表明，LFT技术是开发碳纤维增强热塑性塑料的有效且新颖的方法。