Semi-metal Brake Pads

Semi-metal friction material, used for disc brake pads of cars and heavy vehicles, its material formula usually contains about 30% to 50% of ferrous metals (such as steel fibers, reduced iron powder, foamed iron powder). It is the first non-asbestos material developed to replace asbestos. Its characteristics are: good heat resistance, large power absorption per unit area, high thermal conductivity, and can be used for high-speed and heavy-duty vehicles. However, there are also disadvantages such as loud brake noise and brittleness.

NAO Brake Pads

NAO means None asbestos organic, that is, non-asbestos organic friction material. NAO friction material refers to non-asbestos-non-steel fiber friction material in a broad sense. The base material in NAO friction material is two or more above fibers (inorganic fibers and a small amount of organic fibers) are mixed, so the NAO friction material is a non-asbestos mixed fiber friction material. The advantages are environmental protection, low noise when rubbing, and a little better thermal decay performance, but it does not have good thermal conductivity and good high temperature controllability like semi-metal brake pads.

Ceramic Brake Pads

Ceramic brake pads do not contain metal, materials include mineral fiber, aramid fiber and ceramic fiber (because steel fiber will rust, generate noise and dust, so it cannot meet the requirements of ceramic type formula), ceramic type brake pads are cleaner and quiet than other brake pads, has a stable coefficient of friction, good thermal stability, long service life, and provides excellent braking performance without wearing out the metal parts that make up the friction pair with the friction disc.