What is the application of calcium carbonate in the papermaking industry?

As Paper Filler

Calcium carbonate has many advantages such as low price, can improve the opacity of paper, and increase the ink absorption performance of paper. It is one of the important traditional fillers in the paper making industry.

Used As White Pigment In The Coating Of Coated Paper

Coated paper coating is a composite formula, such as calcium carbonate, china clay, titanium dioxide or calcined kaolin and carboxymethyl cellulose (CMC). The advantages of calcium carbonate are: high whiteness, can adjust the absorption of ink, has better hiding power and optical properties, and is cheap.

Play Some Special Roles In Paper

Calcium carbonate or modified calcium carbonate fillers can impart special functionality to paper products under certain conditions, such as magnetic properties, photocatalytic properties, flame retardancy, antibacterial properties, electrical conductivity, and high bulk properties.