Applications and advantages of N990 in the rubber industry
THERMAX medium particle thermal cracking carbon black N990 is generated by thermal cracking of natural gas at a high temperature of 1300℃. The thermal cracking process gives N990 the unique properties of large particle size and low structure. Thermal cracking carbon black has the largest particle size (average diameter of 240-320nm) and the lowest specific surface area of 7-12m2/g, while furnace carbon black has an average diameter of 15-80nm and a specific surface area of 27-135m2/g. The particle size of thermal cracking carbon black is 3-20 times larger than that of furnace carbon black.

THERMAX medium particle size pyrolytic carbon black is widely used in products that require good dispersion, heat, oil and chemical resistance, and good dynamic properties. Large particle size and low structure can reduce compression permanent deformation, viscosity and improve resilience while ensuring the rubber's own inherent elasticity. As a non-reinforcing carbon black, it is often used in combination with furnace carbon black and/or mineral fillers to reduce costs and obtain specific rubber properties.

The unique morphology and chemical properties of pyrolytic carbon black allow it to be incorporated into rubber compounds to create unique rubber properties. Thermally cracked carbon black was once widely used as an additive in low-cost rubber compounds to reduce unit costs.

Because pyrolytic carbon black has the widest particle distribution (80 - 550 nm) of all carbon blacks, the particles are mostly spherical, which allows pyrolytic carbon black to minimize voids in the rubber compound at high filler levels.

Thermally cracked carbon black has a stable surface and a low specific surface area, which prevents or minimizes chemical reactions with oil, fuel, fuel additives, oil drilling chemicals, etc. Thermally cracked carbon black has excellent heat resistance.

Thermally cracked carbon black has excellent dielectric properties. When used as a filler, it maintains high volume resistivity in various elastomers. Its large particle size and low structure do not affect the semiconducting conduction mechanism, i.e. the electron tunneling effect.

Because thermal cracking carbon black does not have a large impact on the original properties of rubber compounds, it is usually possible to have a high filler content in the compounds. The high filler volume can reduce the cost of the whole rubber compound.

Elastomers blended with pyrolyzed carbon black show good dynamic properties. Therefore, thermally cracked carbon blacks are well suited for compounds that require high resilience and low hysteresis losses.