Nitrile Rubber is the most widely used elastomer in the seal Industry. Excellent resistance to petroleum products and its ability to be compounded for service over a wide temperature range has made Nitrile a very popular material.
It is a copolymer of butadiene and acrylonitrile. Specific properties can be achieved by varying the proportions of these individual polymers. Acrylonitrile content in Nitrile can be varied from 18% to 50% by weight. Nominal designations are ‘low’ (18 to 24%), ‘medium’ (28% to 33%) and ‘high’ (38% and higher) Nitrile. An increase in acrylonitrile content increases heat as well as chemical resistance to petroleum base oils and fuels but decreases low-temperature flexibility. Nitrite provides excellent compression set, tear resistance, cold flow, and abrasion resistance. The major downsides of Nitrile are its poor ozone and weather resistance and moderate heat resistance. Hydrogenated – NBR is used in applications requiring high wear and chemical resistance.
| Compound No. | Material | Material | Colour | Features | Major Application |
|---|---|---|---|---|---|
| NB01 | NBR90 | NBR | Black | High modulus, high strenght, low compression set | 'O' ring for satic sealing |
| NB02 | NBR70 | NBR | Black | Very low compression set | Energizer rings for piston seal and road seals.O ring |
| NB03 | NBR74 | NBR | Black | Low copression set, self lubricating,wear | Sealing element for PS024 |
| NB04 | NBR80 | NBR | Black | Very low Comression set, Higher modulus | Enerizer rings for piston seal( Eg. PS096, PS032) |
| NB06 | NBR80 | LNBR | Black | Very good low temperature resistance, Low compression set | Energir ring for piston seal PS032-0 |
| NB07 | NBR70 | LNBR | Black | Very good low temperature resistance, Low compression set | Energizer rings for piston seal and road seals, O rings |
| NB10 | NBR85 | NBR | Black | High wear resistance, hydrolysis resistance | Seals for heavy / high speed friction |
| NB11 | XNBR80 | X-NBR | Black | Very high wear resistance comparable to polyurethane | Seals for heavy / high speed friction |
| NB12 | HNBR70 | H-NBR | Black | High temperature and chemical resistance | Special purpose seal |
| VT01 | FPM80 | FPM | Ash Black | Very high resistance with excellent mechanical properties | O ring for high temeperatur applications |
| VT04 | FPM90 | FPM | Ash Black | Very high heat resistance with excellent mechanical properties | Seals for high temperature applications |
| FR51 | NBRCF | NBR + FABRIC | Ash Black | Fabric reinforced, high wear resistance, high modulus | v' Packing |
| FR52 | FPMCF | FPM + FABRIC | Brown | Fabric reinforced, high temperature resistence,high wear resistnce, high modulus | 'V' packing for high temperature application |
