Reinforced nylon, also called fiber-reinforced nylon, uses reinforcing materials to improve the properties of nylon. The reinforcing materials include glass fiber, asbestos fiber, carbon fiber, titanium metal, etc. Among them, glass fiber is the main material to enhance the heat resistance, dimensional stability, rigidity and mechanical properties (tensile strength and bending strength) of nylon, especially the mechanical properties, and it has become an engineering plastic with excellent properties. There are two kinds of glass fiber reinforced nylon: long fiber reinforced nylon and short fiber reinforced nylon.