Three important environmental factors that shorten the life of polyamide belts|Yonghangbelt

1. Oxygen: oxygen in the rubber with the rubber molecules in the free base chain lock reaction, molecular chain breakage or excessive cross-linking, causing changes in rubber properties. Oxidation is one of the important causes of rubber aging.

2. Heat: increase the temperature can cause thermal cracking or thermal crosslinking of rubber. But the basic role of heat or activation. Increase the rate of oxygen diffusion and activation of the oxidation reaction, thus accelerating the rate of rubber oxidation reaction, which is a widespread aging phenomenon - thermal oxygen aging.

3. Light: the shorter the light wave, the greater the energy. The destructive effect on rubber is the higher energy of ultraviolet light. In addition to directly causing the breakage and cross-linking of rubber molecular chains, UV light produces free radicals due to the absorption of light energy, which triggers and accelerates the oxidation chain reaction process. Ultraviolet light acts as a heater. Another characteristic of light action (unlike heat action) is that it is mainly generated on the surface of the rubber. Specimens with high gum content will have a net-like crack on both sides, the so-called "light outer layer crack".

4. moisture: the role of moisture has two aspects: rubber in the humid air drenching or immersed in water, easy to destroy, this is due to the rubber in the water-soluble substances and clear water groups and other components of the water extraction dissolved. Caused by hydrolysis or absorption, etc. In particular, the alternating effects of water immersion and atmospheric exposure can accelerate the destruction of rubber. In some cases, however, water has no damaging effect on rubber and even has a delaying effect on ageing.

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