As a professional manufacturer of O-ring seals, today Xiaobian will introduce the material and some characteristics of O-ring seals.

Do you know what kind of rubber material the O-ring is made of?

O-type sealing ring is a kind of sealing product with simple structure, many specifications and great quantity. The sealing quality life of the O-ring depends on the dimensional accuracy and the rubber material. Generally, the adhesive material is required to have a certain mechanical strength, tear resistance, good heat resistance, oil resistance, chemical medium resistance, and small compression deformation under the conditions of use, which is the main index.

What material is the rubber material of the O-ring? The sealant of the sealing ring can actually be divided into many different materials according to the requirements of use and the working environment.

According to the requirements of customers, generally have heat resistance, oil resistance requirements, the use of rubber material to nitrile rubber. Acrylic rubber can be used for oil resistant sealing products requiring higher temperatures. Fluororubber for oil resistant rubber products requiring higher temperatures, and silicone rubber for heat resistance. When the working pressure is high, the way to increase the hardness of O-ring rubber material is to increase the filling amount of carbon black, but the filling amount is too high, it is difficult to mix, and damage the basic physical properties of vulcanized rubber, but also make the rubber material easy to char.

In the case of the use of the same rubber, such as nitrile rubber, in order to improve heat and oil resistance, reduce compression deformation, peroxide vulcanization system or effective sulfur vulcanization system can be used. These two vulcanization systems can generate more carbon-carbon bond crosslinked structure and single sulfur bond crosslinked structure, effectively improve the heat resistance and oil resistance of vulcanized rubber, and reduce compression deformation.

There are many reasons for the damage of O-ring, such as the diversity and uncertainty of our use environment, which may lead to the damage of O-ring. Here are two common reasons

1, sealing ring overload: each material and product has its own load, if it exceeds the load limit of the product, there will be damage, fracture, deformation and other phenomena. Therefore, it is necessary to consult relevant information when doing product design to see how much the load of the product is and whether the product has been overloaded.

2, O-ring material aging: sometimes material aging will be one of the reasons for silicone ring damage, each material has its own life, long-term use has been aging silicone ring will be prone to damage phenomenon. So we should often check the use of silicone sealing ring, service life has reached a critical value.

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