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Factors exacerbating the aging of braided silicone tubing

Time:2022-12-05Page views:2940

Woven silicone tubing is a transparent and flexible pipeline that can be used for water, sealing, and gas transmission. Generally, it does not react with other substances except for strong acids and alkalis. With the continuous improvement of extrusion technology, its stability has been strengthened and it is widely used in daily life. It is an inorganic polymer colloidal material formed by the condensation of silicic acid. Due to the higher concentration, the better, and most of its raw materials are extracted by precipitation method. That is to say, the silicone gel settles in the container, and the upper part is used for high transparency of the raw materials, which are used for manufacturing.

Although braided silicone tubing has outstanding performance, it will gradually age after long-term use, which is a normal phenomenon. Proper use can slow down the aging process, while improper use can accelerate aging.

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Factors that accelerate the aging of silicone tubing:

1. Silicone tubing has the characteristic of being resistant to ozone, but ozone itself has strong chemical activity and destructiveness, which can also cause molecular chains in silicone to break. When the silicone tube used for deformation is mainly unsaturated rubber, cracks in the same direction as the silicone tube will appear, known as "ozone cracking"; The formation of an oxide film on the surface without cracking is due to the changing effect of ozone on the silicone tube as it deforms.

2. Moisture can have a significant impact on silicone tubing. Although silicone tubing is commonly used for conducting water and gas, it is prone to aging when exposed to a humid environment for a long time. This is caused by factors such as the dissolution, hydrolysis, or absorption of water-soluble substances in silicone tubing by water. When water and oxygen alternate, the aging of silicone tubing will be faster.

3. Oxygen will undergo a free radical chain reaction with the silicone molecules in the silica gel, causing excessive cross-linking and breakage of the molecular chains, thereby changing the properties of the silica gel. It is different from ozone and cannot be avoided. Oxidation is one of the important causes of rubber aging.

The above are the main factors causing the aging of braided silicone tubes, and there are many other issues that can also affect the service life of silicone tubes. While paying attention to the larger aspects, attention should also be paid to the smaller details.


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