Kaolin Powder Application In Paper Industry


The pure kaolin produced by kaolin production equipment has the characteristics of high whiteness, soft quality, easy dispersion and suspension in water, good plasticity, high adhesion and excellent electrical insulation; At the same time, it also has good acid solubility, low cation exchange capacity, good fire resistance and other physical and chemical properties. Therefore, kaolin has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemical industry, coating, medicine and national defense. Among them, the application of kaolin in the paper industry has gradually become the main demand in various industries.

The application of kaolin equipment in papermaking can not only give paper good coverage and good coating gloss, but also increase the whiteness, opacity, smoothness and printing adaptability of paper, and greatly improve the quality of paper. The application of kaolin in papermaking industry mainly has two aspects: one is the filler used in papermaking process; The other is the pigment used in the surface coating process. For general culture paper, the filler amount accounts for 10% – 20% of the paper quality. For coated paper and paperboard, in addition to fillers, pigments for coating are also required. Kaolin is a white pigment commonly used and consumed in the paper industry; The proportion of kaolin used for filler and pigment is 20% – 35% of the mass of paper.



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