Uses the purity high ripe aluminum to become for the processing of raw material, available in each kind of friction material, gets up the stable friction coefficient and falls Low attrition function. The metal aluminum melting has absorbed the massive heat energies in the friction process, played the radiation role; The metal aluminum quite is soft uses in rubbing material not Yi Shanggu, the wound plate, may lengthen the brake system the service life. This Outside the aluminum proportion is light, can reduce the material the weight, the aluminum is very even in the friction material superficial distribution, the command rubs the material Surface artistic attractive.