O-ring is a kind of sealing product with simple appearance design, various specifications and models, and a huge total.
The sealing quality and service life of O-rings lie in the precision of specifications and rubber materials. It is generally stipulated that the rubber compound has certain mechanical equipment strength, resilience characteristics, excellent high temperature resistance, oil resistance, and solvent resistance, and needs to have a small reduction in permanent deformation under the application standard.
According to application regulations, nitrile rubber is the main application compound with high temperature resistance and oil resistance. Acrylic resin vulcanized rubber can be applied to oil-resistant sealing products with higher specified temperature (150°C to l90°C).
Specify silica gel for high temperature resistance.
When the pressure is high, increasing the strength of the O-ring compound can increase the filling amount of carbon black, but if the filling amount is too high, it is difficult to mix the rubber, and it harms the basic physical properties of the vulcanizate, and also makes the compound easy to embrittle.
Under the conditions of using the same vulcanized rubber, such as nitrile rubber, in order to improve high temperature and oil resistance and reduce permanent deformation, a chloroprene vulcanization management system or a reasonable sulfur vulcanization management system can be selected. These two vulcanization management systems can form more chemical cross-linking structures and single-sulfur bond chemical cross-linking structures, which can reasonably improve the temperature resistance and oil resistance of the vulcanizate, and reduce the permanent deformation.
