Classification of carbon black

Carbon black is an amorphous carbon, light, loose and very fine black powder, the surface area is very large, ranging from 10-3000m2 / g, the carbonaceous material (coal, natural gas, heavy oil, fuel oil, etc.) in the air insufficient conditions by the incomplete combustion or thermal decomposition product obtained.

Carbon black according to different purposes, usually divided pigment carbon black, carbon black for rubber, conductive carbon black and special carbon black.

Pigment carbon black - the international arena, according to carbon black coloring ability, usually divided into three categories, namely high carbon black pigment, the pigment carbon and low carbon black pigment. This classification usually three English letters, the first two letters of the carbon black coloring ability, and the last letter production methods.

Carbon black for rubber - rubber carbon black was originally classified according to particle size, but later changed by nitrogen surface area classification. In addition, the naming of the carbon black pigment vulcanization rate and structure factors also taken into account, constituted by the four systems. The first letter on behalf of rubber vulcanization speed, N represents the normal curing speed, S for slow cure speed. Behind three of Arabic numerals. The first number represents nitrogen surface area of ​​the carbon black ranges from 0 to 9 were classified as grade. The second and third numbers by ASTM D24.41 responsible for carbon black and terminology designated by the Committee,
reflecting the different structural levels, which is about the level of carbon black structure determination, there is a certain degree of arbitrariness. Relatively speaking, the larger the number, the higher structure.

According to the function, can be divided into reinforcing carbon black, colored black, conductive carbon black.

Depending on the model, carbon black is mainly divided into N220, N330, N550, N660, N990, N110, N115, N234, N326, N339, N375, N539, N550, N880 and other models.

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