The danger of static electricity to rubber grommets
In addition to NBR, natural rubber and other synthetic rubber materials have a volume resistivity of 1010Ω•cm or more and good electrical insulation. Under the action of motion, stress and friction, these rubber grommets are prone to charge accumulation and are charged, called static electricity.
The result of static electricity on the surface of rubber grommets not only absorbs a lot of dust and oil, but also affects the beauty of grommets. It also affects the processing and performance. It can even cause discharge or spark discharge, which will accelerate the aging of rubber grommets and may also cause The surrounding flammable and explosive materials are on fire or explosion, and a safety accident occurs. Therefore, in today’s large-scale use of polymer materials such as rubber, the problem of electrostatic hazard becomes more and more prominent. Therefore, in some applications, rubber grommets, etc. should be improved in antistatic properties.
The way to prevent static hazards is to reduce or prevent friction as much as possible to reduce static electricity generation; on the other hand, to find ways to eliminate surface static electricity.
There are many ways to eliminate the static electricity on the surface of rubber grommets. For example, using a conductive device to eliminate static electricity during processing; improving the humidity of the air in the processing and use environment of the product; modifying the rubber structure with polar or ionized groups; oxidizing the surface with a strong oxidizing agent to change the surface properties; Add or apply antistatic agents to the rubber grommets. The most common method is to add an antistatic agent so that the static electricity generated is continuously leaked to prevent static electricity from accumulating.