Carbon black is a black powdery substance formed by incomplete combustion or pyrolysis of hydrocarbons under strictly controlled process conditions. Its main component is carbon (containing a small amount of oxygen, hydrogen, sulfur and other elements). It is an important raw material for rubber, plastic, ink and other industries. ‌

Carbon black models and their characteristics:

N762 carbon black: This is a highly wear-resistant reflective carbon black with excellent strength and durability. It can improve the tensile strength and wear resistance of materials and is widely used in rubber products, plastic products, coatings and other fields.

‌N110 carbon black: It has excellent reinforcement and wear resistance, and is very suitable for treads and formulations with extremely high wear resistance requirements. However, it has some shortcomings in processability, crack resistance and heat generation.

‌N220 carbon black: As an early product in the N200 series, N220 is widely used. Its wear resistance is between N110 and N330, while giving the rubber compound excellent tensile strength, which is particularly suitable for treads and rubber products with high quality requirements.

‌N330 carbon black‌: Although its wear resistance is slightly inferior to the N200 series, N330 carbon black is widely used in tires, especially for products such as tire treads and truck tire cord rubber compounds. Its tire rolling loss is only slightly higher than N351, which is better than other N300 series carbon blacks.

Application areas

‌Rubber industry‌ (accounting for more than 90%):

As a reinforcing agent and filler, it significantly improves the wear resistance (fine particle size carbon black) and aging resistance (coarse particle size carbon black) of tires. For example, N134 carbon black is widely used in tire manufacturing due to its excellent conductivity and adsorption.

‌Plastics and coatings‌:

It provides UV shielding function, enhances weather resistance, and is used in high blackness demand scenarios such as automotive topcoat.

‌Electric carbon products‌:

Mixed with coal tar to make brushes, nuclear reactor materials, etc., using its high resistivity and thermal stability.

‌Ink and dry battery‌:

As a black pigment and conductive agent, it improves printing clarity and battery performance.

The main parameters of carbon black include particle size, specific surface area, oil absorption value, compression, hardness, sieve residue, ash content, volatile matter and chemical stability. These parameters jointly determine the performance and application range of carbon black.

‌Particle size‌: The particle size range of carbon black particles is usually between 10~500μm. The smaller the particle size, the larger the specific surface area, the higher the blackness and the better the hiding power.

‌Specific surface area‌: The specific surface area of carbon black ranges widely, ranging from 10 to 3000m²/g. The larger the specific surface area, the better the adsorption performance.

‌Oil absorption value‌: An indicator to measure the surface adsorption performance of carbon black, indicating the volume of refined linseed oil adsorbed by unit mass of carbon black. The higher the oil absorption value, the better the adsorption performance.