Silicone rubber refers to the main chain is alternately composed of silicon and oxygen atoms, silicon atoms are usually connected with two organic groups of rubber. Ordinary silicone rubber is mainly composed of silicon chains containing methyl groups and a small amount of vinyl. The introduction of phenyl can improve the high and low temperature resistance of silica gel, and the introduction of trifluoropropyl and cyanide can improve the temperature and oil resistance of silica gel. Silicone rubber has good low temperature resistance and can still work at -55 ° C. After the introduction of phenyl, it can reach -73℃. Silicone rubber also has heat resistance. It can work for a long time at 180 ° C, and can withstand a few weeks or more at 200 ° C. It is also flexible, and it can instantly withstand high temperatures above 300 ° C. The permeability of silicone rubber is good, and the oxygen permeability is better in the synthetic polymer. In addition, silicone rubber also has the outstanding characteristics of physiological inertia and does not cause coagulation, so it is widely used in the medical field.

The main performance is as follows:

First, low temperature performance: the glass transition temperature of silicone rubber is generally -70 ~ 50 ° C, and special technology can reach -100 ° C, indicating that its low temperature performance is excellent. This is of great significance to the aviation and aerospace industry.

Second, high temperature performance: silicone rubber is characterized by high temperature stability. Although the strength of silicone rubber at room temperature is the most natural rubber or half of some synthetic rubber, but at high temperatures above 200 ° C, silicone rubber can still maintain a certain flexibility, elasticity and surface hardness, and its mechanical properties have not significantly changed.

Third, weather resistance: the silicone silicone bond in silicone rubber is very stable to oxygen, ozone and ultraviolet light, and has excellent weather resistance without adding any additives.

Physical and mechanical properties: the physical and mechanical properties of silicone rubber at room temperature are worse than ordinary rubber, but at 150 ° C high temperature and -50 ° C low temperature, its physical and mechanical properties are better than ordinary rubber.

5. Oil and chemical resistance: Ordinary silicone rubber has medium oil resistance and solvent resistance.

Six, electrical performance: silicone rubber has excellent insulation properties, corona resistance and arc resistance is also very good.

Seven, physiological inertia: silicone rubber is non-toxic, tasteless, odorless, does not adhere to human tissues, has an anticoagulant effect, and has a small reactivity to human tissues. Especially suitable for use as medical materials.

Gas permeability: At room temperature, the permeability of silicone rubber to air, nitrogen, oxygen, carbon dioxide and other gases is 30 to 50 times higher than that of natural rubber.

Silicone rubber wire is suitable for connecting cables of fixed line or mobile electrical appliances with rated AC voltage of 0.6/1KV and below. The product has the characteristics of high temperature resistance, cold resistance, softness and so on. The cable has soft structure, convenient heat dissipation, stable electrical performance in high temperature (high cold) environment, outstanding aging resistance and long service life. Products are widely used in metallurgical industry, power engineering, petrochemical, electronic devices, automotive industry and other manufacturing industries. Silicone rubber control cables are suitable for 450/750 volt AC ratings and for laying mobile or fixed equipment. The cable has the advantages of high flexibility, high temperature resistance and voltage resistance.