The wet-laid hybrid nonwoven process can produce affordable carbon fiber-reinforced thermoplastic (CFRTP) because of its process simplicity, which can promote the application of CFRTP products in automobile weight reduction. The wet-laid hybrid nonwoven process involves two procedures, mainly: prepare preforms by a papermaking-like process and heat-molding compression. The parameters of heat-molding compression affect the quality of CFRTP directly, but there are not enough researches focusing on the effects of heat-molding compression parameters. This study aims to optimize the wet-laid hybrid nonwoven process to prepare recycled CFRTP. A proper carbon fiber content was determined firstly. Then, response surface methodology was used to optimize the heat-molding compression parameters. The effects of fiber length on composite properties were also investigated. The results showed that the fiber content of 30 wt% was the most suitable. The optimized heat-molding conditions were temperature, pressure, and time of 190°C, 2 MPa, and 10 min, respectively, leading to the lowest void content of 0.9%. CFRTP comprising carbon fibers with a length of 6 mm had the best properties, with the tensile strength of 59.34 MPa and flexural strength of 145.91 MPa.

湿法混合非织造布工艺因其工艺简单而可以生产价格合理的碳纤维增强热塑性塑料（CFRTP），可以促进CFRTP产品在减轻汽车重量方面的应用。湿法混合非织造工艺涉及两个过程，主要是：通过类似造纸的过程制备预成型坯并进行热成型压缩。热成型压缩参数直接影响CFRTP的质量，但对热成型压缩参数影响的研究还不足。这项研究旨在优化湿法混合非织造工艺，以制备回收的CFRTP。首先确定合适的碳纤维含量。然后，使用响应面方法优化热成型压缩参数。还研究了纤维长度对复合材料性能的影响。结果表明30重量％的纤维含量是最合适的。优化的热成型条件分别是温度，压力和时间，分别为190°C，2 MPa和10分钟，从而使最低孔隙率达到0.9％。包含长度为6 mm的碳纤维的CFRTP具有最佳性能，其拉伸强度为59.34 MPa，弯曲强度为145.91 MPa。