Silica(also named white carbon black) is a common filler for rubber which can substitute carbon black, especially in colourless or white or other colour products. It can reinforce rubber, significantly improving rubber compound‘s wear and flexion resistance, as well as bringing anti-heating&oxidating performances. As a result, it can effectively reduce tire rolling drag force and raise anti-wetting property and safety index. In shoe making, the powder using speed is fast which can shorten mixing time.