The Manufacturing Process:

Capital Carbon is recovered through controlled thermal decomposition of carefully selected feedstock of end-of-life tyres in specialized reactors. The extracted carbon is passed through the separation process to remove contamination in form of steel,fiberglass fragments and other metallic and non-metallic impurities. The pure carbon recovered through the process is further milled to achieve required particle size distribution for proper compounding with rubber and plastics.


Composition of Our rCB:

The carbon recovered in our process is not a new type of carbon. It is a mixture of original range of carbon black grades that were used in tyre formulation from N110 up to N774, along with inorganic contents such as Silica, Zinc Compounds and other trace elements used during rubber compoundig.


Capital Carbon’s Recovered Carbon Black (rCB) and Inorganic Content

The normal inorganic content is approximately 12-18%. Tests via an outside certified laboratory shows that such inorganic content has no damaging effects to the physicals of final compound. In most cases, compound performance may be enhanced due to the make-up of inorganic content. Further in general inorganic contents such as Silica and Zinc Oxides are added at time of compounding.


Composition of Inorganic Content 12-18%:

->  9 – 12% Silica – this material has been found to be active and promotes reinforcement in all polymer compounds.

-> 2-5% Zinc Oxide – Studies have shown that these small inconsistent amounts are not significant enough to alter curing time.

->  1-3% Sulphur

->  1-2% Inert Material – The remaining material is considered to be neither an advantage nor disadvantage to the performance of the final compound.