Application of laser particle size analyzer in water-based ink

The main components of water-based ink include pigments, resins, additives and water. Water-based ink pigment types include white, black, color, fluorescent, luminous, metal and other powders. The use of pigments will depend on their purpose, and each pigment has its own different surface properties.

The most commonly used black pigment is carbon black, which is a pure black powder obtained by burning hydrocarbons in the absence of air to obtain extremely high powder, and then separating them. The diameter of carbon black is very small, with a minimum diameter of up to 9 nm. It has a large entrance (10~3,000 m2/g) and a high oil absorption capacity (30~100 g/100 g). There is greater attraction between particles and it is easy to gather. Moreover, the low oxygen content on the surface of carbon black results in low hydrophilicity and poor dispersion stability in water. Similarly, the quality of dispersion will directly affect the blackness, hue and hiding ability, and can Import ink availability. Carbon black with small particle size, surface oxidation and low structure will have high blackness, high glass and high tinting strength. Therefore, in order to disperse the carbon black to a smaller particle size, the dispersant needs to provide depolymerization (wetting, wetting, etc.) of the powder. dispersion) and stable dispersion stability (static dispersion force and three-dimensional dispersion).

The particle size of the raw material plays an important role in the physical properties of the ink and affects subsequent application properties. This time, Winner803 is recommended to test water-based ink samples for customers.

Measuring instrument information is as follows:

The video of measuring nanoparticles is as follows：