Carbon Fiber-Reinforced Thermoplastic Prepregs

1. Novelty in Impregnation Techniques Conventional methods, when handling high-viscosity thermoplastic resins, often fall short in terms of resin flow and fiber wetting. To address this, researchers have introduced the suspended hot melt technique and ultrasonic-assisted impregnation. The suspended hot melt method disperses resin powder in an aqueous suspension, leveraging ultrasonic cavitation to expand fiber tows and embed resin granules uniformly between fibers. Subsequent high-temperature melting and consolidation enable the large-scale production of high-performance resins like PEEK and PPS. This eco-friendly process allows for continuous production, enhancing prepreg uniformity and mechanical attributes. Ultrasonic-assisted impregnation uses high-frequency oscillations to diminish resin surface tension, improving resin infiltration and reducing porosity while increasing […]