Rubber seals It is a kind of rubber products widely used in sealing technology. Because rubber is a precious elastic macromolecular material, with a wide temperature range, it will produce large deformation if given a small stress in different media. This deformation can provide contact pressure, compensate leakage gap, and achieve the purpose of sealing. Rubber is characterized by very small elastic modulus and 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 puzzling 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 phenomena such as crazing, hardening, discoloration, cracks, etc. of the rubber when it is used or stored.

The main factors affecting the aging of rubber seals are the natural environment. First, the impact of oxygen, ozone and other air components is mainly due to the occurrence of oxidation reaction, which causes the molecular chain of rubber to break. However, the impact of ozone and oxygen is different, and ozone is more destructive to oxidation. 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 will easily cause rubber deformation and softening. Third, temperature has a great impact on rubber, mainly because in cold winter, it will harden the rubber seriously, which will lead to rubber fracture, and in hot summer, it will soften the rubber.