The hardness of nitrile gum has significant influence on its properties. The following is a specific analysis of the effect of FOREVER SEALS hardness on the properties of nitrile rubber:
First, wear resistance and aging resistance
The higher the hardness value of nitrile rubber, the more difficult it is to compress, and the better the wear resistance and aging resistance. High-hardness nitrile butadiene rubber performs well in automotive manufacturing, industrial production and other applications requiring wear resistance, pressure resistance and aging resistance.
Second, elastic and compressive deformation
Hardness is closely related to elasticity, compression deformation and other properties. With the increase of hardness, the elasticity of nitrile rubber may be reduced, and the compression deformation will be reduced. But too much hardness can cause the rubber to lose its elasticity and become similar to leather.
3. Acrylonitrile content and hardness
Acrylonitrile (ACN) content is an important factor affecting the hardness of nitrile butadiene rubber. When the ACN content increases to a certain extent, the hardness of nitrile rubber will increase significantly, and its elasticity, compression deformation and other properties will also change. For example, when the ACN content exceeds 60%, nitrile rubber will gradually harden and lose the elasticity of rubber.
Four, oil resistance and solvent resistance
NBR has excellent oil resistance and solvent resistance, especially against petroleum-based oils, benzene and other non-polar solvents. However, too high hardness may affect the balance of oil resistance and solvent resistance. Therefore, when selecting nitrile rubber, it is necessary to select the appropriate hardness value according to the specific application scenarios and requirements.
5. Other performance
In addition to the above properties, the hardness of nitrile rubber may also affect its radiation resistance, weather resistance, ozone resistance and other properties. For example, nitrile rubber with an acrylonitrile content of 33% to 38% has good radiation resistance, but too high or too low hardness may affect its radiation resistance.
The hardness of nitrile gum has an important effect on its properties. In practical applications, it is necessary to select the appropriate hardness value according to the specific material and use conditions to ensure that rubber products can meet the required performance requirements.
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