One of the main reasons for aging is the polymer structure itself. Therefore, it is important to improve the structure of polymer to improve the aging ability. For example, after vulcanization, there are still unsaturated double bonds in rubber, and it is difficult to avoid the erosion of sunlight, oxygen, ozone, etc. when using rubber products, so research and synthesize new varieties to avoid or greatly reduce the double bonds on the polymer chain of rubber.

For example, ethylene and propylene monomers are copolymerized to produce ethylene diene rubber, which is different from other synthetic rubbers in structure. One of the major characteristics is that the main chain does not contain double bonds and is completely saturated, making it an ozone resistant, chemical resistant and high temperature resistant aging rubber; Another is to add antioxidants, such as antioxidants to prevent aging caused by oxygen or ozone, ultraviolet light stabilizer, heat stabilizer, mildew inhibitor, etc., to neutralize the adverse factors that cause aging.

Polyester tire is divided into long-fiber polyester tire and short-fiber polyester tire. The long-fiber polyester tire is made of strong polyester chips as raw materials, which are sprayed by equipment, reinforced by needle, and impregnated by glue. It is a new type of tire base cloth for making modified asphalt waterproof roll.