Why does the effect of silicone rubber sealing strips deteriorate after being used for a period of time?
Source:sohu Author:QL Chemical Release time:2024-09-09 11:14 Reading times:90


Silicone sealing strips are a type of silicone rubber product. People in the sealing industry know that silicone sealing strips made of silicone have a very long service life and excellent advantages. Silicone sealing strips are smooth, transparent, flexible, non-toxic and tasteless, resistant to high and low temperatures, not easy to age, not deformed after long-term use, and resistant to slight acids and alkalis. They also have good performance in ozone resistance, solubility resistance, and electrical insulation, so they are widely used in chemical, mechanical, electronic, medical and food industries.

However, some users have found that after using silicone sealing strips for a period of time, some quality problems will occur:
1. Shrinking and falling off in a short time after installation;
2. Becoming brittle and hardened shortly after use, and even losing elasticity and its sealing function.
3. Due to structural reasons, the silicone sealing strips cannot be truly installed.
4. After being exposed to sunlight or heat, the silicone sealing strips become sticky.
The emergence of these problems seems to have lost the advantages of silicone rubber strips, but do you know why such problems occur? Although silicone rubber strips themselves have very good superior performance, if they are used improperly, various problems will arise. Therefore, in order to avoid problems such as poor use of silicone rubber strips and waste of materials, the sealing strip materials under various chemical conditions must be selected according to the actual situation. While considering cost factors, the use environment and working conditions of the materials must be taken into account.
In short, fluororubber sealing strips can generally be used under "high temperature" conditions; cold-resistant sealing strips can be used under "low temperature". In the case of "low corrosion", you can choose a sealing strip with good comprehensive performance, such as EPDM rubber sealing strip; if you want to achieve food grade, you can choose silicone rubber sealing strip. In addition, although silicone rubber strips themselves have very good superior performance, if they are used improperly, various problems will arise. Therefore, in the process of use, you must choose the most reasonable silicone sealing strip according to the actual situation.


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