Use of fumed silica in paper coatings

Fumed silica is one of the extremely important new high-tech ultrafine inorganic materials. Due to its small particle size, large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion properties and other special properties , unique in many disciplines and fields.

Paper Most of the paints are water-based paints. The surface of fumed silica has a large number of silanol groups, which can form hydrogen bonds with polar molecules (such as water in water-based paints), thus showing good thickening properties;

The particle size and oil absorption capacity of color inkjet printing paper coatings are the most critical parameters in color inkjet paper coatings. Fumed silica is nanoscale amorphous silica particles. Due to its small particle size and large specific surface area It has the characteristics of large size, large porosity and high oil absorption value, so it is an ideal raw material for inkjet printing paper.

Due to its small particle size, large porosity and high oil absorption value, fumed silica has now become a key raw material for the ink-absorbing coating of color inkjet printing paper. In paper coatings, fumed silica is There are two main functions: one is to thicken thixotropic additives, and the other is to serve as the main filler and the ink receiving layer of the main inkjet printing paper.