Prepreg entails being partially prepared beforehand, i.e. reinforcements that are already pre-impregnated with plastic resin. Thermoset prepregs are normally stored in -18 °C temperature. Before use it is taken out of the freezer and is left to warm up to room temperature. Curing is performed by means of heat and pressure. The heat is raised in stages so the plastic alters it’s state to a low viscosity liquid (thermoset) and, by continuously adding heat, will harden in the mould as a completed product.
Most prepregs are unidirectional and layered with various weave types as well as widths. Discontinuous fiber mats, knitted fabrics, and felts may also be produced as prepregs. All reinforcement types can be used, the most common ones are carbon fibers and glass fibers.
Prepregs are optimized by their plastic to reinforcement ratio, so that final product’s mechanical to weight ratio properties are peaked. Prepregs are easy to use and have the potential for substantially reducing material waste. The disadvantages are: high-pricing and expensive storage (thermoset prepregs) and manufacturing methods associated with higher demands.
FOR NOW, PREPREGS FOR SALE IN 5 M2 BATCHES. Contact one of our company’s sales representatives to assist with ordering and technical details.