As kaolin is of the obstruct to the infrared and can improve the heat preservation of the plastic products.with the even size distribution it can improve the surface finish of the plastic products.in the plastic system,it is of good disparity and good crosslink with the resin,good compensation.pure in the quality,less ferrotitanium,strong in the chemical inert,it does not act with any chemical agent in the ambient temperature,it can improve the acid and alkali resistance and chemical corrosion of products and lower the cost effectiverly.