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How much do you know about glass fiber reinforced plastic
August 11, 2022
Glass fiber reinforced plastics (internationally recognized abbreviations as GFRP or FRP) are a wide variety of composite materials with good performance and wide applications. It is a functional new material made of synthetic resin and fiberglass material through a composite process, and has played an important role in the construction of the national economy.
What is FRP
Glass fiber reinforced plastic (FRP) is a composite plastic with glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin as the matrix material. As a kind of composite material, FRP has been widely used in aerospace, railway, decorative construction, home furniture, building materials, bathroom and sanitation engineering and other related industries due to its unique performance advantages.
According to the different fibers used, glass fiber reinforced plastics are divided into glass fiber reinforced composite plastics (GFRP), carbon fiber reinforced composite plastics (CFRP) and boron fiber reinforced composite plastics. It uses glass fiber products (glass fibre cloth, fiberglass tape, fiber mat, fiberglass yarn, etc.) as the reinforcing material, and uses synthetic resin as the matrix material. Fiber-reinforced composites are composed of reinforcing fibers and a matrix. The diameter of the fiber (or whisker) is very small, generally less than 10 microns, and it is a brittle material that is easily damaged, broken and corroded. The matrix has viscoelasticity and elastoplasticity, and is a ductile material.
The relative density of glass fiber reinforced plastic is between 1.5 and 2.0, which is only 1/4 to 1/5 of carbon steel, but its tensile strength is close to or even higher than that of carbon steel, and its strength is comparable to that of high-grade alloy steel. The tensile, flexural and compressive strength of some epoxy FRP can even reach more than 400 MPa.

Main disadvantages:
1. Small elastic modulus; 2. Poor long-term temperature resistance; 3. Low interlaminar shear strength.
The main advantage:
1. Good corrosion resistance; 2. Good dielectric properties; 3. Good thermal properties; 4. Strong designability; 5. Excellent manufacturability.