Friction material is a kind of application in power machinery, rely on friction to perform braking and transmission function of component materials. It mainly includes a brake lining (brake pad) and a clutch face (clutch pad). Brake pads are used for braking and clutch pads for transmission. Any mechanical equipment and various moving vehicles must have a brake or transmission device. Friction material is the key component of the brake or transmission device. Its primary function is to absorb or transfer power through friction. If the clutch plate transmits power, the brake plate absorbs kinetic energy. They enable machinery and all kinds of motor vehicles to work safely and reliably. So friction material is a widely used and critical material.