Nitrile Rubber
General Features
Durometer Range (Shore A) | 20-95 |
Tensile Strength Range (P.S.I / MPA) | 200-3000 / 1.4-20.5 |
Elongation (Max. %) | 600 |
Compression Set | Good |
Flexibility - Bounce | Good |
Abrasion Resistance | Excellent |
Tear Resistance | Good |
Solvent Resistance | Good - Excellent |
Oil Resistance | Good - Excellent |
Low Temperature Use (C°) | -35° to -40° |
High Temperature Use (C°) | Up to 120° |
Aging Weather Conditions - Sunlight | Poor |
Adhesion to Metals | Good - Excellent |
Properties
Nitrile rubber is a copolymer of butadiene and acrylonitrile (ACN). The butadiene segment of nitrile provides the compound with elasticity and low-temperature flexibility. It also contains an 'unsaturated' double bond that forms cross-links during vulcanization. This unsaturated double bond will also be the primary attack point for chemicals, heat, and oxidation.
The second segment of nitrile rubber, acrylonitrile, determines the compound’s fuel and oil resistance, hardness, abrasion resistance, and tensile strength. By increasing the acrylonitrile content of a compound, better heat resistance and gas impermeability can be achieved. The ACN content of nitrile rubber material generally ranges from 18% to 45%, with a general-purpose nitrile compound typically containing around 34%. By choosing an elastomer with a balanced and suitable acrylonitrile content for its other properties, we can use nitrile rubber in a wide range of applications depending on individual needs.
Nitrile (Buna-N) is a general-purpose oil-resistant polymer that provides good solvent, oil, water, and hydraulic fluid resistance. In addition, nitrile rubber exhibits good compression set, abrasion resistance, and tensile strength. Nitrile should not be used in applications involving highly polar solvents such as acetone, MEK, ozone, chlorinated hydrocarbons, and nitro hydrocarbons.
The second segment of nitrile rubber, acrylonitrile, determines the compound’s fuel and oil resistance, hardness, abrasion resistance, and tensile strength. By increasing the acrylonitrile content of a compound, better heat resistance and gas impermeability can be achieved. The ACN content of nitrile rubber material generally ranges from 18% to 45%, with a general-purpose nitrile compound typically containing around 34%. By choosing an elastomer with a balanced and suitable acrylonitrile content for its other properties, we can use nitrile rubber in a wide range of applications depending on individual needs.
Nitrile (Buna-N) is a general-purpose oil-resistant polymer that provides good solvent, oil, water, and hydraulic fluid resistance. In addition, nitrile rubber exhibits good compression set, abrasion resistance, and tensile strength. Nitrile should not be used in applications involving highly polar solvents such as acetone, MEK, ozone, chlorinated hydrocarbons, and nitro hydrocarbons.
Applications
The properties of nitrile rubber material make it an excellent solution for sealing applications. The popularity of nitrile material stems from its excellent resistance to petroleum products and its ability to be compounded for service up to 120°C. With these temperature resistances, the correct nitrile rubber compounds can withstand almost any condition except for the most severe automotive applications. Other special compounding and forming applications that benefit from the properties of nitrile rubber include:
- Oil-resistant applications
- Low-temperature applications
- Automotive, marine, and aircraft fuel systems
- Nitrile roll covers
- Hydraulic hoses
- Conveyor belts
- Nitrile tubing