Industry knowledge of plotter for cutting of aramid pre-pregs：
Main requirements for prepreg reinforcements:
1. Good wettability to the resin;
2. With good film properties, to meet the requirements of complex shape molding;
3. Meet the main performance requirements of the product.
The reinforcing fibers are glass fiber, carbon fiber and aramid fiber. Commonly used reinforcement forms include unidirectional fibers, gingham fabrics, twill fabrics, and multiaxial fabrics.
In general, it is difficult to meet process performance requirements through a single resin. Usually, several resin combinations are used to achieve the process operation, such as using several different epoxy resin combinations to increase the viscosity of the resin system at normal temperature or low temperature. The phenolic epoxy resin can improve the reactivity and heat resistance of the resin system, and the bisphenol A epoxy resin can adjust the viscosity of the resin system. Studies have shown that the resin system suitable for prepreg is preferably a liquid bisphenol A type epoxy resin, a solid bisphenol A type epoxy resin and a phenolic epoxy resin.