Discussion on aging of rubber sealing strip

The aging problem of rubber sealing strip has always been a difficult problem in the sealing strip industry. At present, rubber is still widely used in the sealing strip industry, so it is very important to solve the aging problem of rubber for the development of the sealing strip industry. At the same time, aging is a major factor affecting the sealing performance of the sealing strip.

The aging of rubber mainly refers to the cracking, hardening, discoloration, cracking and other phenomena of the surface of the rubber during use or storage.

The main factors that affect the aging of the sealing strip are the natural environment. First, the impact of oxygen, ozone and other air components. The main reason is that the molecular chain of rubber is broken due to the occurrence of oxidation reaction. However, the impact of ozone and oxygen is different, and the oxidative damage of ozone is greater. The second is the influence of light and moisture, which is the key factor to accelerate aging. Moisture in the air is the necessary condition to cause rubber softening, and light is the main factor to promote its discoloration. Long-term sunlight exposure is easy to make rubber deformation and softening. Third, temperature and temperature have a relatively large impact on rubber, mainly because it will harden rubber seriously in cold winter, which will lead to rubber fracture, and soften rubber in hot summer.

The above points are the main factors that promote the aging of the rubber sealing strip. Therefore, the maintenance of the sealing strip should mainly start from the above aspects of waterproof, air insulation and thermal insulation.