Reasons conveyor rubber aging effects

In the conveyor belt use, easy out items rubber layer aging, loss phenomenon, caused rubber aging factors about several aspects:
        1) Oxygen: Oxygen rubber in the rubber molecules with a radical chain reaction, molecular chain breakage or excessive cross-linking, causing changes in rubber

properties. Oxidation is a major reason for the aging of rubber.
        2) ozone, oxygen chemical activity is much higher than that, more destructive, it is also the molecule chain was broken, but the effects of ozone on the case with rubber

or deformation of rubber and different. As for the deformation of the rubber (mainly unsaturated rubber) occurs when the stress

Direction perpendicular to the cracking effect, the so-called "ozone cracking"; acting on the deformation of the rubber, not only the oxide film formed on the surface cracking.
       3)) Heat: raising the temperature may cause thermal cracking of rubber or thermal crosslinking. However, the basic effect of heat or activation. Improve oxygen diffusion

and activation of the oxidation reaction speed, thereby accelerating the oxidation reaction rate of the rubber, which is a common practice of aging - thermal aging.
      4) Light: light is shorter, the greater the energy. From the damaging effects of the rubber is high energy ultraviolet Flat belt conveyor  light. In addition to direct UV-strand breaks caused

by rubber molecules and crosslinking, the rubber due to absorption of light energy to produce free radicals to initiate and accelerate the oxidation chain reaction process.

Ultraviolet

Plays a role in the heating light. The role of the other characteristics of light (and heat different role) is that it mainly in the rubber surface of the Ascent. Gel sample

rate, net cracks will appear on both sides of the so-called "light outer crack."
      5) mechanical stress: the plastic chain conveyor in action as well as repeated mechanical stress and the constant friction roller process, will make the rubber molecular chains

generate free radicals induced oxidative chain reaction, forming force chemical processes. Mechanical rupture of molecular chains and mechanical activation oxidation process.

Which can account for

Advantages, depending on the conditions in which. In addition, under stress prone to ozone cracking.
      6) Water: the role of water has two aspects: rubber rain or humid air immersed in water, easily damaged, which is due to the rubber material and the water-soluble groups

and other ingredients were dissolved in water, extracted. Hydrolysis or absorption causes. And particularly in the water immersion

Alternating atmospheric exposure under the action will accelerate the destruction of the rubber. However, in some cases, water is not destroy the rubber, and even delay the

effects of aging.
     7) Other: on rubber factors include chemical media, variable valence metal ions, high-energy radiation, electrical and biological.