Since 1970
Since 1970
Carbon Black ASTM Grade N220 is an intermediate super abrasion furnace (ISAF) black that offers high tensile strength, superior tear resistance, and excellent wear resistance in rubber compounds. Featuring a fine particle size and high surface area, it provides about 10% to 20% higher abrasion resistance compared to standard N330 grade carbon black. It is primarily utilized in passenger and commercial vehicle tire treads, heavy-duty conveyor belts, and high-strength industrial rubber goods.
Carbon Black ASTM Grade N220 belongs to the N200 series of furnace blacks characterized by fine particle diameter (~20–25 nm) and high specific surface area. Under ASTM D1765 classification, the "N" indicates a normal curing rate, while the "2" signifies its particle size group.
Because of its high reinforcement capability, N220 significantly enhances the mechanical durability, hardness, and road-traction behavior of vulcanized rubber compounds.
High Reinforcement & Tensile Strength: Delivers exceptional mechanical strength and chip-and-cut resistance to rubber matrices.
Superior Abrasion Resistance: Outperforms general-purpose furnace grades like N330 and N550 in wear resistance under heavy friction.
Electrical Conductivity: Possesses moderate electrical conductivity, aiding electrostatic dissipation in rubber products.
Processing Behavior: Generates higher heat during dynamic stress and increases compound viscosity/hardness compared to coarser grades.
| Property / Parameter | Typical Value | Unit | Test Standard |
| Appearance | Black Granular / Pellets | — | Visual |
| Iodine Adsorption Number | $121 \pm 5$ | g/kg | ASTM D1510 |
| Nitrogen Surface Area (NSA) | $114 \pm 5$ | $\text{m}^2/\text{g}$ | ASTM D6556 / D3037 |
| STSA (Statistical Thickness Surface Area) | $106 \pm 5$ | $\text{m}^2/\text{g}$ | ASTM D6556 |
| Oil Absorption Number (OAN / DBP) | $114 \pm 5$ | $\text{cm}^3/100\text{g}$ | ASTM D2414 |
| Compressed Sample OAN (COAN) | $98 \pm 5$ | $\text{cm}^3/100\text{g}$ | ASTM D3493 |
| Tinting Strength | $116 \pm 5$ | % | ASTM D3265 |
| Pour Density | $355 \pm 20$ | $\text{kg}/\text{m}^3$ | ASTM D1513 |
| Heating Loss (Moisture) | $\le 1.5$ | % | ASTM D1509 |
| Ash Content | $\le 0.5$ | % | ASTM D1506 |
| 45 $\mu\text{m}$ Sieve Residue | $\le 0.1$ | % | ASTM D1514 |
Tire Manufacturing: Heavy-duty commercial truck tire treads, passenger car tire treads, off-the-road (OTR) tire components.
Conveyor Belting & Hose Covers: High-strength industrial belts and hoses requiring high resistance to abrasion, tearing, and cutting.
Mechanical Rubber Goods (MRG): Molded or extruded rubber parts subjected to aggressive dynamic stress.
Plastics & Masterbatches: Used as a pigment and UV-stabilizing additive in specialty polymer compounds.