Bio aramide is a unique composite bio fiber( hff -ba fiber in short) and produced by United chemindo. As the traditional steel fiber type friction material(ie semi-metallic friction material) exists some weakness known by people, for example; higher gravity, high hardness; high heat-conductivity, trending to rust, abrasing to brake couple(discorddrum), higher cost of steel fiber etc. Since 1990s. People started to research and develop "non-asbestos, non-metallic fiber type friction material" in many countries. At present, it has overall replaced the steel fiber type semi-metallic friction material in many advanced countries in Europe. United chemindo had successfully researched and developed the hff unique composite bio fiber in 1998 through german institute forschung. After testing and using in over sixty two factories, the product has normally been applied in many friction material manufacturing enterprises and has exported abroad. It is used to manufacture the non-asbestos disc pad