Rubber joint is a kind of used for joint on the pipe connection.The bulk material is rubber, equiping with a flange at the same time.Because the rubber has many excellent properties, such as scalable, high temperature resistance, corrosion resistance, therefore, widely used in petroleum, rubber joint water supply, drainage, electricity, fire, health and other fields.Rubber joint in use process is easy to appear aging phenomenon, so why is this case?

The first thing to know what is the aging of rubber.Rubber products in the processing, storage and use process, due to oxygen, ozone, heat, ultraviolet light, radiation, or other chemical erosion, will gradually become soft, become sticky, hardening, brittle and crack etc. Phenomenon, thus affecting the physical and chemical properties and mechanical properties, make the rubber joint eventually lost use value, this phenomenon is known as the aging of rubber.

So what are the causes of aging rubber joint?1.Ozone oxygen (oxidation) 2. (ozone) 3 .thermal oxidation (hot) 4. Uv (ultraviolet irradiation) 5. water (water soluble) 6 .mechanical stress and external force (mechanical).Rubber aging process is not reversible, once the rubber aging, then lost the use value and the essence of which is the molecular structure of the rubber oxidative degradation reaction happened.Degradation reaction decreased average molecular mass of the rubber, the strength also declined, and the rubber is soft and sticky, crisp, and loss of elasticity.