Carbon black's various properties and price advantages have been widely used in more and more industries. The current use of carbon black is undoubtedly in the field of rubber. However, other characteristics of carbon black have gradually occupied a certain position in the industrial field. Pigment carbon black is the main topic of Daimo New Materials today.
Pigment carbon black is used for coloring in inks, paints, coating products and other products. We have already mentioned this before. But how to choose pigment carbon black? Of course, this issue is not worth mentioning at all for technical engineers who are familiar with carbon black. However, Furui Carbon Black feels it is necessary to popularize the basic knowledge of pigment carbon black applications to people who do not understand carbon black. Today we will talk about the purchase of pigment carbon black.
First of all, before choosing, you must consider what requirements you want to use carbon black to achieve. Coloring, toning, UV resistance or conductivity. Of course, this is very simple for those who have been in the industry for many years. However, people who do not know much about carbon black need to communicate with carbon black professional technical engineers to jointly conduct a technical evaluation of the material system and select a more suitable carbon black variety.
Usually, carbon black with high blackness and small particle size is selected for coloring. However, you must ensure that the carbon black is reasonably and completely dispersed, otherwise it will not meet your requirements. When using carbon black for color matching, you need to choose carbon black with low blackness, large particle size, and easy dispersion. If you want to use carbon black to achieve UV resistance, you should choose carbon black with medium particle size and slightly higher structure. Their UV resistance is better.
Among them, the blackness of pigment carbon black is actually the reflectivity of carbon black. Often expressed as data measured by reflectivity. The higher the blackness, the lower the reflectivity. Blackness can also reflect the original particle size of carbon black to a large extent. Generally, the higher the blackness of carbon black, the smaller the particle size. The volatile content of carbon black indicates the number of oxygen-containing groups on the surface of carbon black, and reflects the surface physical properties, electrochemical properties and application properties of carbon black. The structure of carbon black is a representative value of the degree of chain branching formed by the aggregation of carbon black particles. It represents the degree of voids inside the carbon black. We usually express it by the oil absorption value.
Another point mentioned above is the dispersion of pigment carbon black. The dispersion of pigment carbon black is of very important significance in the application process. Pigments must be dispersed in a state of fine particles that meet optical properties when used. Carbon black is one of the most difficult to disperse pigments among all pigments. Therefore, the quality of carbon black dispersion will directly affect the blackness, hue and covering of carbon black. Ability, directly affects the use effect of pigment carbon black.