NBR - Acrylonitrile Butadiene Rubber

The properties of a nitrile rubber compound can vary depending on the specific formulation and the additives used. Different compounds are designed to meet specific performance requirements for various applications. Here are some common properties and characteristics of nitrile rubber compounds:

  1. Hardness: Nitrile rubber compounds can be formulated to have a wide range of hardness levels, from soft and flexible to hard and rigid. The hardness is typically measured on the Shore A or Shore D scale.

  2. Oil and Fuel Resistance: Nitrile rubber compounds are known for their excellent resistance to oils, fuels, and petroleum-based fluids. The amount of acrylonitrile content in the compound plays a significant role in determining the level of oil resistance.

  3. Chemical Resistance: Nitrile rubber compounds offer good resistance to a wide range of chemicals, including acids, alkalis, solvents, and hydraulic fluids. However, the resistance may vary depending on the specific chemicals involved and the compound formulation.

  4. Compression Set Resistance: Nitrile rubber compounds can be formulated to have low compression set, meaning they can retain their shape and elasticity after being subjected to compressive forces over time. This property is crucial for sealing applications.

  5. Flexibility and Elasticity: Nitrile rubber compounds can be designed to exhibit excellent flexibility and elasticity, allowing them to withstand repeated deformations without permanent damage. The compound formulation and the choice of additives contribute to these properties.

  6. Temperature Resistance: The temperature resistance of a nitrile rubber compound depends on the specific formulation. While nitrile rubber can generally withstand temperatures ranging from -40°C to +125°C (-104°F to +248°F), the compound may have a narrower temperature range based on the additives used.

  7. Abrasion Resistance: Nitrile rubber compounds can be formulated to offer good resistance to abrasion and wear. Reinforcing agents, such as carbon black, can be added to enhance the compound’s resistance to mechanical wear.

  8. Tensile Strength: Nitrile rubber compounds can be designed to have moderate to high tensile strength, providing resistance to stretching and tearing forces. The compound formulation, including the choice of reinforcing agents, fillers, and additives, influences the tensile strength.

  9. Electrical Insulation: Nitrile rubber compounds generally exhibit good electrical insulation properties. They can be used in electrical and electronic applications to provide insulation against electrical currents.

It is worth noting that the specific properties of nitrile rubber can vary depending on the composition, formulation, and manufacturing process. Different additives and fillers can be incorporated to modify certain characteristics to meet specific application requirements.

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