Raw Carbon Black

Pyrolytic carbon black is a product generated through pyrolysis technology, and it is so named because it differs from the traditional carbon black production methods. The average particle size of pyrolytic carbon black is40-50 nm, similar to GPF carbon black aggregates, with ash content of 14±2% mainly composed of silicon dioxide, cobalt salts, and zinc, it exhibits unique chemical and physical properties with high cross-linking and diffusion rates. It offers similar reinforcing effects (tensile strength) to N550, similar modulus values (tensile stress) to N772, similar tear strength to N330, and similar reinforcing effects to N660. Therefore, pyrolytic carbon black not only provides good filling and reinforcing in rubber formulations but also improves the uniform dispersion of carbon black in compounded rubber, enhancing the processing properties of semi-finished rubber products. It is thus used in formulations for inner plies, outer plies, bead rubber, inner lining rubber, and inner tube rubber in nylon bias-ply tires. Without altering the other ingredients in the original formula, it can replace N550/772 conventional carbon black by 20-30 parts by mass without affecting the quality of the finished tire. Additionally, pyrolytic carbon black is widely used in rubber products such as cables, belts, seals, and roller cores.

Technical Specifications

Testing Items Index 

Iodine Absorption Valueg/kg 42 ±8 

DBP Absorption Value: 10-5 m³/kg 64 ±8

Heating Reduction %≤ 1.5 

Coloring% - 

45 µm sieve residue % ≤ 0.10

150 um sieve residue % ≤ 0.02

Screen residue % ≤ -500um

pH 6-9

Tensile StrengthMpa ≥ 18 

Tensile elongation break% ≥ 400 

300% Elongation Stress Mpa ≥ 3