Pyrolytic carbon black is a product generated through pyrolysis technology; due to its distinction from traditional carbon black production methods, it is referred to as pyrolytic carbon black. The average particle size of pyrolytic carbon black is40~50nm, 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 capabilities. 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 has been applied in formulations for inner and outer tire cords, side walls, inner lining, and inner tube of nylon bias-ply tires, replacing N550/772 conventional carbon black with 20-30 parts by weight without affecting the quality of the finished tire. Moreover, pyrolytic carbon black is widely used in rubber products such as cables, belts, seals, and roller rubber.

Technical Specifications

Test Items Index 

Iodine Absorption Valueg/kg 42 ±8 

DBP Absorption Value 10-5 m³/kg 64 ±8

Heating Reduction %≤ 1.5 

Colored% - 

45μm sieve residue % ≤ 0.10

150 µm sieve residue % ≤ 0.02

% Retained on 500 um sieve ≤ -

pH 6-9

Tensile StrengthMpa ≥ 18 

Break elongation% ≥ 400 

300% elongation stress Mpa ≥ 3