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GRP is also written FRP, Chinese name: glass reinforced thermosetting plastic or glass reinforced plastics. It is a kind of composite material, including matrix and reinforcement. The matrix of GRP material is resin, which plays a bonding role, accounting for 30%~40% of the total volume. Resin is a kind of thermosetting plastic, including EP, PF, resin, etc. The reinforcement of GRP material is glass fiber, which plays a reinforcing role. Glass fiber is a kind of inorganic non-metallic man-made inorganic fiber, such as glass fiber, carbon fiber, Kevlar fiber B, etc., accounting for roughly 60%~70% of the total volume. Therefore, GRP is a plastic matrix composite material composed of organic nonmetal and inorganic nonmetal.
GRP has good electrical insulation performance and bonding performance, high mechanical strength and heat resistance, textile, resistance to general acid and alkali and organic solvents, mold resistance. Molding shrinkage rate is small, volume shrinkage 1%~5%, after adding curing agent must be pressurized heating molding, also can be in contact pressure room temperature curing.