Is uses the ordinary sour aluminum wool to pass through cuts short spurts again through the special craft, it which the rubber becomes in the friction material has the good thermostable performance, the thermal conductivity quite is low, it attaches effectively in the friction material surface energy reduces in the friction material other low temperature material hot decline Also through spurts the rubber craft in the silicic acid aluminum wool and the friction material other materials has a better associativity, the enhancement friction material adsorbability. Outward appearance