In life, many people may have seen the appearance of white O-rings on the surface after using for a period of time. The sealing ring is a kind of annular gasket, which is usually fixed in the groove. As for the sealing effect, today the editor of O-ring kits box engineering in china will introduce the reason for its whitening.
In the production of O-rings, rubber raw materials (raw rubber) and many different fillers (mainly vulcanizing agents, softeners, tackifiers, etc.) need to be used. These materials can be mixed and vulcanized. forming.

Some people think that the whitening of the sealing ring is a sign of poor quality, but it is not. In many cases, the whiteness of the sealing ring is not a quality problem. The so-called whitening is the phenomenon of "frosting" or "waxing" on the surface of the sealing ring after being placed or used for a period of time.
Frosting is formed after the sealing ring is placed for a period of time, because the liquid or solid compounding agent in the rubber material migrates from the inside of the rubber to the surface of the rubber. Through research, we can find that a small amount of compounding agent is precipitated inside the rubber. The compounding agent forms a spray. Spray wax is actually the precipitation of paraffin, ozokerite and other waxy substances, which form a wax film on the surface of the sealing ring.
The above is the introduction of O-ring kits box engineering in china: the reason why the O-ring is white.