There are many types of carbon black that can be used on rubber, two of which are rubber carbon black and conductive carbon black, so many friends have doubts about whether rubber carbon black and conductive carbon black are the same? They are actually different, specifically The difference is as follows:
Carbon black for rubber and conductive carbon black are mainly distinguished from the function of the product, so the performance indicators of carbon black are different.
Carbon black for rubber mainly focuses on the physical properties, wear resistance and tensile properties of carbon black, which are implemented according to the requirements of the national standard GB3778-2003. The commonly used models in the market can be divided into N219, N220, N330, N326, N550, N660, N774, etc. The specific application industries are different, so the selected models are different.
Conductive carbon black focuses on the conductivity, specific resistance, and oil absorption value of carbon black, which indicate the conductivity of conductive carbon black, which is implemented according to the requirements of the national standard GB3782-2006. According to the purpose, it can usually be divided into three categories, battery grade conductive carbon black, rubber grade conductive carbon black, and ink grade conductive carbon black. The specific requirements of each industry are different. At present, there are no specific normative guidance documents. Tests and applications go to select different manufacturers.
The role of rubber carbon black and conductive carbon black in rubber is different
There are three main functions of rubber carbon black in rubber, which are high wear resistance, reinforcement and semi-reinforcement.
The role of conductive carbon black in rubber is mainly under the conductivity, which can make the rubber play the role of conductivity, anti-static, electromagnetic shielding and so on.