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Is FRP a composite material?
The history of composite materials can be traced back to ancient times. Straw reinforced clay and reinforced concrete used since ancient times are composed of two materials. In the 1940s, due to the needs of aviation industry, glass fiber reinforced plastics (commonly known as glass fiber reinforced plastics) were developed, and the name of composite materials appeared from then on. Since 1950s, high strength and high modulus fibers such as carbon fiber, graphite fiber and boron fiber have been developed. Aramid fiber and silicon carbide fiber appeared in 1970s. These high-strength and high-modulus fibers can be compounded with synthetic resin, carbon, graphite, ceramics, rubber and other nonmetallic or metallic substrates such as aluminum, magnesium and titanium to form unique composite materials. FRP is a composite material. Composite materials are composed of two or more materials with different properties by physical or chemical methods. The properties of various materials are complementary, resulting in synergistic effect, which makes the comprehensive properties of composite materials superior to raw materials to meet various requirements. They can be divided into three categories: resin matrix composites, ceramic matrix composites and metal matrix composites.

This is the situation before FRP coloring. FRP is mainly composed of resin and glass fiber cloth. The raw material of FRP is resin, which is a liquid similar to glue and mixed with curing agent to form solid resin. Because pure resin has no strength, it is stronger than steel after curing with glass fiber cloth. This is a composite material. The full name is FRP, which is a composite material with glass fiber as aggregate and epoxy resin or phenolic resin as filler. Resin is also a kind of adhesive.