What Are The Reasons That Affect The Dispersion Of Carbon Black?

The original particle size, structure and surface groups of carbon black will have a great influence on dispersion. Under normal circumstances, the original particle size of the pigment carbon black is small, the structure is low, and the volatile content is low, and it is difficult to disperse. The purpose of dispersing carbon black is to make the carbon black in a colloidal distribution state in the carrier. This degree of distribution will directly affect the hue, blackness and hiding power of the product.

The dispersion of carbon black is mainly restricted by three factors: the characteristics of the carbon black itself; the type of carrier or dispersion medium; and the type of dispersion equipment used. When using carbon black for coloring, poor dispersion of carbon black will result in the following consequences: unstable color strength; poor color; streaks; printing problems caused by uneven surface of the product. It can be seen that the dispersion of carbon black is very important in practical applications.

If the particle size is too fine, there will be more voids between the carbon black particles. There is a large amount of air between these voids and it takes longer to wet. Therefore, the finer the particle size, the high pigment carbon black is dispersed. It takes more time to invade before. The finer the particle size, the more difficult it is to disperse, and greater force is required during dispersion. After the original production of this type of carbon black, a series of post-treatments are required to increase the active substance on the surface of the pigment carbon black particle and improve its performance. Dispersibility.