Silica sol is a disperse colloid composed of dispersed spherical SiO2 particles, with a large surface area, anion and cation functions, and a wide range of particle sizes. As a basic pigment component in inkjet coating formulations, it has the following functions:
1) Excellent printing clarity and optical density;
2) Good ink dispersion and absorption, promote quick drying of ink;
3) Reduce the amount of base material (adhesive) to a large extent, the typical formula is to use 10 parts or less of polyvinyl alcohol adhesive;
4) Silica sol exists in liquid form, there is no problem of mixing dry powder SiO2 into slurry, such as powdering and wetting.