Explanation

Also called melting method prepreg. The prepreg is prepared by heating and melting the solid resin system and soaking the fiber. Fiber impregnation can be completed by three methods: ① extrude the melted resin into the mold through which the fiber passes with the "-" extruder to obtain fiber type prepreg; ② Put resin into resin tank with heating function. After the resin tank is heated, the fiber (or fabric) passes through the flowing resin, and then is wound onto the laying machine (or winding device) for cooling to obtain prepreg; ③ First, resin is made into resin film, and then under the action of heating plate temperature and pressure of pressing roller (roller), resin film is melted and impregnated with fiber (or fabric) - cooled to obtain prepreg. Mtting prepared prepreg is suitable for thermosetting resin, amorphous and crystalline thermoplastic resin. Wide application range,! Its manufacturing process is solvent-free and pollution-free, which is conducive to the production of low porosity composite materials. However, this method requires specific equipment and high temperature conditions, and requires high wettability between resin and fibers.

Classification