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Talk about the factors that cause aging when using stainless steel mesh belt in summer.

by:YiFan Conveyor     2024-03-25
Pay attention to the factors that cause aging when using stainless steel mesh belts in summer

Stainless steel mesh belts should follow the development path of technological innovation. Our stainless steel mesh belt manufacturers only need to increase technical investment, change their development ideas, and lay out industrial innovation patterns. The effective way should be to make some improvements according to the characteristics of the product. For the problems in use, find a way to overcome them. The good situation is to solve them. If they cannot be completely solved, we should avoid such problems according to the actual situation. .

The following are the factors that cause the aging of stainless steel mesh belts:

1 Oxygen: Oxygen reacts with free radicals in rubber with rubber molecules, and the molecular chains are broken or excessively cross-linked, causing changes in rubber properties. Oxidation is one of the important reasons for rubber aging.

2. The chemical reactivity of ozone and ozone is much higher than that of oxygen, and it is more destructive. It is to make the molecular chain break too, but the effect of ozone on the rubber is different according to the deformation of rubber or not. When it is used on deformed rubber (mainly unsaturated rubber), cracks appear perpendicular to the direction of stress, which is the so-called 'ozone cracking'; when it is used on deformed rubber, only an oxide film is formed on the surface without cracking.

3 Heat: Increasing the temperature can cause thermal cracking or thermal crosslinking of rubber. But the basic effect of heat is activation. Increase the oxygen diffusion rate and activate the oxidation reaction, thereby accelerating the rubber oxidation reaction rate, which is a common aging phenomenon - thermal oxygen aging.

4 Light: The shorter the light wave, the greater the energy. It is the ultraviolet rays with higher energy that destroy the rubber. In addition to directly causing the breakage and crosslinking of rubber molecular chains, ultraviolet rays can also generate free radicals due to the absorption of light energy, which initiates and accelerates the oxidation chain reaction process. The UV light acts as a heating agent. Another feature of light action (different from heat action) is that it mainly grows on the surface of rubber. For samples with high glue content, reticular cracks will appear on both sides, which is the so-called 'optical outer layer crack'.

5 Mechanical stress: Under the repeated action of mechanical stress and the continuous friction process with the roller, the stainless steel mesh belt will break the rubber molecular chain to generate free radicals, trigger an oxidation chain reaction, and form a mechanochemical process. Mechanical breaking of molecular chains and mechanical activation of oxidation processes. Which one can prevail depends on the conditions in which it is located. In addition, it is easy to cause ozone cracking under stress.

6 Moisture: The role of moisture has two aspects: rubber is easily damaged when it is exposed to rain in humid air or soaked in water. This is because the water-soluble substances and clear water groups in the rubber are extracted and dissolved by water. Caused by hydrolysis or absorption. Especially under the alternating action of water immersion and atmospheric exposure, the destruction of rubber will be accelerated. However, under certain circumstances, moisture does not damage the rubber, and even has the effect of delaying aging.

7 Others: Factors affecting rubber include chemical media, variable valence metal ions, high-energy radiation, electricity, and biology.

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