Carbon Black can increase the hardness of rubber, but many friends do not know what factors affect the hardness of rubber. In fact, the characteristics of carbon black affect the hardness of rubber. Here, Jiululing Carbon Black Network will introduce the influence of carbon black on the strength of rubber.
Effect of carbon black particle size on rubber hardness
The particle size of carbon black is closely related to the hardness of rubber vulcanizate. It can be said that the smaller the particle size of carbon black is, the greater the hardness of rubber vulcanizate is. In the series of carbon black used for rubber, N110 has the highest hardness and is also the rubber carbon black with the smallest particle size.
Effect of carbon black structure on rubber hardness
The structure of carbon black will also affect the hardness of rubber. The higher the structure of carbon black, the greater the hardness of rubber vulcanizate. Under the same particle size, the hardness of high structure carbon black is greater than that of rubber vulcanizate with carbon black of the first structure.
Influence factors of carbon black content on rubber strength
The addition amount of carbon black will also affect the strength of rubber. The addition amount of carbon black will increase the hardness of vulcanizate. However, the hardness of crystalline rubber is larger than that of amorphous rubber, so the vulcanizate hardness of crystalline rubber is higher than that of amorphous rubber under the same carbon black content.
Effect of various carbon black on rubber hardness
Carbon black is the first choice for hardening rubber products. Carbon black can be used in all kinds of rubber. However, to increase the hardness of rubber with carbon black, you need to choose N110, N220, N330 and other hard carbon black. The soft carbon black, such as N550, N660, N770, N990, is used to enhance the tensile resistance of rubber, and does not increase the hardness of rubber.
Effect of carbon black mesh number on rubber hardness
The carbon black will be inked before use. It is usually necessary to inked the purchased granular carbon black or powdered carbon black before use. It can be seen that the mesh size of carbon black also has a certain impact on rubber. Of course, carbon black ink grinding is also for better dispersion of carbon black into rubber.
Effect of carbon black on tensile strength of rubber
Tensile strength indicates the ultimate ability of products to resist tensile failure. With the abrasion resistance and tear resistance, it has become the three major reinforcement standards for the quality of vulcanizate. First, the carbon black content increases with the increase. Secondly, the specific surface area of carbon black is in direct proportion to the tensile strength, while the correlation between carbon black structure and tensile strength is not obvious. However, the tensile strength is greatly affected by the carbon black structure when the carbon black content is higher or lower.
