Kaolin is the most extensively used particulate mineral in the filling and coating of paper. It improves paper appearance, which is characterized by gloss, smoothness, brightness and opacity, and of greatest significance, it improves printability. Paper is also filled with kaolin to extend fiber.
The characteristics of kaolin that have the greatest influence on the quality of paper are the purity, rheology and particle geometry of the processed mineral. Generally, the most deleterious impurities for brightness of kaolin are iron oxide and titanium oxide minerals. The rheology of kaolin-binder-water suspensions at high solid: liquid ratios (as much as 65%) must be approximately Newtonian for efficient blade coating at speeds as great as 1300 meter/min. Particle geometry, defined as particle size, particle size distribution, particle shape and aggregate structure, has a dominant influence over the rheological character of kaolin slurries, as well as on the properties imparted by the kaolin to filled and coated paper.
If you interested in kaolin product, please contact with us for more information:
No.18 Son Ha Minerals Co.,Ltd
Address: Mam Xoi Mountain, Thanh Son Commune, Kim Bang District, Ha Nam Province, VN
Telephone: +84 936 212 598
Hotline: +84 986 358 011 (Whatsapp / Wechat) - Mr. Thomas