Method of use of carbon black

Carbon black is a kind of black pigment widely used in various industrial fields. It is widely used in rubber, plastic, printing paint and other industries. The use of carbon black is very important, improper use may affect its use effect, and even cause adverse consequences. This paper will introduce the correct use method and precautions of carbon black in detail.

Basic overview of carbon black

Carbon black is a kind of black pigment synthesized by high temperature pyrolysis, which has high specific surface area and adsorption property. According to the temperature, soot or oxidation gas atmosphere and other conditions, it can be divided into carbon black white carbon black, coal black, graphite carbon black and other types.

Use and performance of carbon black

Rubber industry: Carbon black is one of the most important fillers in the rubber industry and one of the basic raw materials for rubber processing. Adding appropriate amount of carbon black can increase the strength, hardness, wear resistance, tension and cold resistance and electrical conductivity of rubber, and improve the physical and mechanical properties of rubber products.

Plastic industry: Carbon black is often used in plastics to adjust color, enhance mechanical strength, and improve the processability of plastics.

Paint and ink industry: Carbon black is used as black pigment in paint and ink, which can increase the color and coverage of paint and ink.

Printing industry: Carbon black, as one of the important components of printing ink, can increase the blackness and brightness of printed matter.

Other industries: Carbon black can also be used in chemicals and pharmaceuticals, cables, batteries and electronic components.

The properties of carbon black mainly include the following aspects:

1. Specific surface area: the larger the specific surface area, the better the adsorption performance

2. Gloss: gloss refers to the reflectivity of the carbon black surface, that is, the reflectivity of the surface.

3. Particle size and dispersion: the finer the particle size, the more evenly dispersed, the more obvious the filling effect, the better the processing performance.

4. Conductivity: Carbon black has good conductivity and can be used to make conductive materials.

Correct use of carbon black

Select the right variety and quality level: select the appropriate variety and quality level of carbon black according to different application fields and purposes. In the selection of carbon black should pay attention to its specific surface area, gloss, dispersion and conductivity and other performance indicators.

Control the amount of carbon black: in the use of carbon black to control its amount, follow the “less is better” principle.

pay attention to the dispersion of carbon black: pay attention to ensure the dispersion of carbon black, even if carbon black dispersed in a variety of substrates, can maintain the same performance.

Adjust the processing process: the amount and dispersion of carbon black are affected by the processing conditions.

Keep carbon black dry and storage: carbon black should be dried before use, to keep carbon black dry and prevent water absorption from becoming soft.

Precautions for carbon black

Carbon black belongs to dust glumes, so in the operation should wear a good mouth, gloves and other protective equipment to prevent inhalation of respiratory tract and skin irritation.

Black carbon should be stored in a cool and dry environment, away from direct sunlight and moisture. In the storage process, pay attention to fire, explosion, avoid contact with oxidants or flammable substances.

The waste or unused black carbon can be reused under the premise of taking precautionary measures. However, before re-use, the carbon black should be checked and screened to exclude contaminated or damaged carbon black.