Factors Affecting Aging Of Rubber Seals

2020-03-21 11:33:26

Rubber Seal is a kind of rubber product widely used in sealing technology. Because rubber has precious elastic polymer material, a wide temperature range, giving small stress in different media will produce large deformation, which can provide contact pressure, compensate the leakage gap, and achieve the purpose of sealing. Rubber is characterized by a very small elastic modulus and a high elongation. Secondly, it has good air permeability resistance and resistance to various chemical media and electrical insulation.

The aging problem of rubber seals has always been a problem that puzzles the sealing strip industry. At present, rubber is widely used in the sealing strip industry, so solving the aging problem of rubber is very important for the development of the sealing strip industry. At the same time, aging is one of the main factors that affect the sealing performance of the sealing strip. The aging of rubber mainly refers to the phenomenon of cracking, hardening, discoloration, crack and so on during the use or storage of rubber.

The main factors affecting the aging of rubber seals are the natural environment. First, the impact of oxygen, ozone and other air components, mainly the occurrence of oxidation reaction makes the molecular chain of rubber break, but the impact of ozone and oxygen is not the same, and the oxidative damage of ozone is greater. Second, the influence of light and moisture is the key factor to accelerate aging. The moisture in the air is the necessary condition to cause the rubber to soften, and the light is the main factor to promote it to change color. The long-term sunlight is easy to make the rubber deform and soften. Third, temperature and temperature have a great influence on rubber, mainly because it will harden seriously in cold winter, then it will lead to rubber fracture, and it will soften in hot summer.