Rubber and plastic products have the theory of aging. Compared with other rubber products, silicone rubber products have outstanding aging performance, but it is difficult to escape the damage of time and environment and the coverage of application range. At present, the aging life of silicone gasket is gradually concerned by the majority of consumers, who all know that once the aging life of silicone rubber gasket is lost, it may bring a lot Influence and trouble, and replacement and disassembly is more trouble, especially in the mechanical industry, but how to improve the service life of silicone rubber sheet has become a problem.

Environmental impact

In the process of use, many silicone rubber products will gradually age and improve due to strength problems, and the stress impact is mainly due to the deformation caused by long-term extrusion and the damage caused by excessive stress. In the mechanical industry, a product needs to be used in a long-term link for decades, such as the O-ring on the silicone oil press, which is subject to long-term stress friction and belongs to oil seal, so it is used After too long, the performance gradually starts to disappear.

Temperature effect
Although silica gel products can withstand high and low temperature normally, there is still a certain influence on silica gel gasket if it is affected by temperature for a long time. If the hardness of raw material of silica gel rubber is low, the melting point of the material of silica gel is low. When the temperature rises and the back rubber is close to the effect of turning temperature, the plastic flow of the back rubber becomes large, which leads to the release and dissolution of the back rubber, while the material of silica rubber and the back rubber are similar The key problem of different rubber materials is that the strength of silicone rubber materials decreases due to thermal oxidation and high temperature decomposition.






Liquid effect


In the case of oil, the performance of silica gel can't reach the oil resistance effect of specified rubber. For example, the silicone rubber can be used normally in water for a long time. If it doesn't have any influence in the static state, it can be used for more than five to ten years for a long time. However, in the case of motion, such as the silicone rubber gasket is stressed in oil or water, the density of water must be lower than that of silica gel, so the silicon chain is in motion The strength of silicon molecular chain will be reduced by water or oil under stress, so it is not recommended to use it in liquid state.


Impact of materials and finished products


The advantages and disadvantages of materials are the most important influence. Due to the different raw material formulas and material characteristics of different silicone product manufacturers, there may be different differences when you use silicone gasket of different materials in the same place, so material selection, performance and test certification are still important. The quality of finished products is of course important. For the aging problem of silica gel products, the control of time and temperature in the process of product processing can control the real softness and brittleness of products, and the aging life of silicone rubber gasket under stress is likely to increase after the hardness and softness are different.