Turned out berserk thin rubber leather factory Beijing Xintai supply, good quality Yo aging factor A) oxygen: oxygen generating radical chain reaction with the rubber molecules in the rubber molecular chain breakage or excessive cross-linking, causing changes in properties of rubber . Oxidation is a major reason for rubber aging. B) ozone: ozone chemical activity is much higher than that of oxygen, more destructive, it also makes the molecular chain is broken, but the effects of ozone on the case with rubber and rubber deformation or not different. As for the deformation of rubber (mostly unsaturated rubber) occurs when the stress crack straight direction, i.e., so-called "ozone cracking"; when applied to rubber deformation, only the surface oxide film without cracking. C) heat: temperature increase can cause the rubber pyrolysis or thermal crosslinking. However, the basic effect of heat or activation. Increase the oxygen diffusion rate and activated oxidation reaction, thereby accelerating the oxidation rate of rubber, which is a common phenomenon of aging - thermal aging. D) light: light is shorter, the greater the energy. Rubber from the damaging effects of a high energy ultraviolet light. In addition to direct ultraviolet rays cause fracture and crosslinked rubber molecular chain, the rubber due to absorption of light energy to produce free radicals initiate and accelerate the oxidation chain reaction process. After heating the outside light plays a role. Another characteristic of the light effect its director (with different thermal action) is that it primarily into raw rubber surface. Gum containing sample rate, and both sides will be net cracks, so-called "light outer crack." E) Mechanical stress: under mechanical stress repeated the role, will generate free rubber molecular chain Tsuen, triggering oxidation chain reaction to form a force of chemical processes. Machinery and mechanical activation of molecular chains break the oxidation process. How could a dominant, depending on which conditions. In addition, under stress easily lead to ozone cracking. F) water: the role of water in two ways: rubber rain or soak in the humid air in the water, easy to destroy, which is due to rubber-soluble substance and a hydrophilic group and other ingredients are dissolved water extraction, hydrolysis or absorption causes. Especially in the alternate action of water immersion and atmospheric exposure, it will accelerate the destruction of rubber. But in some cases they can not afford to water damaging effects on the rubber, and even slow down the aging effect. G) oil: in the course of long-term exposure if and oil medium, the oil can penetrate into the interior to produce rubber to swell, resulting in strength and other mechanical properties of the rubber is reduced. Oil rubber can swell, because after the oil penetrate the rubber, resulting in a mutual molecular diffusion, so that a network structure vulcanizates change. H) Other: There are contributing factors to rubber chemical media, change divalent metal ions, high-energy radiation, electricity and biology.