Calcined kaolin of our company has acquired excellent application effects in butyl rubber, all-purpose rubber, and EPDM rubber, and our products of our company have been promoted in the field of other rubber. Products of our company applied in such filed shall be specially screened and pass through surface treatment, having good compatibility with rubber base stock, with such advantages as good dispersibility, rapid power speed, and high mixing efficiency. Therefore, it can be used for improving rubber’s mechanical property, wear-resisting property, processability, and appearance ability. Kaolin of our company has complete sheet structure, so that it can be used for improving air impermeability of rubber plug. And at the same time, because of chemical inertness of kaolin, rubber’s ageing resistance and chemical stability can be enhanced effectively.