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Fluorine Rubber With High Temperature Characteristics

Edit:Anji Jiahe Fluorourubber Made Products Co.,Ltd      Date:Oct 10, 2017

Fluorine rubber material definition:

Fluorine rubber is a fluorine-containing synthetic rubber, fluorine rubber with high temperature, oil and resistance to a variety of chemical erosion characteristics, modern aviation, missiles, rockets, aerospace and other cutting-edge science and technology indispensable materials. With the automotive industry on the reliability, security and other requirements of the continuous improvement of the amount of fluorine rubber in the car also increased rapidly.

Since 1958, China has also developed a variety of fluorine rubber, mainly polyolefin fluorine rubber, such as 23, 26, 246 and nitroso-based fluorine rubber; then the development of new varieties of tetrafluorflu rubber , Perfluoroether rubber, phosphorus fluoride rubber. These varieties of fluorine rubber are the first aviation, aerospace and other defense and military supporting the need to start, and gradually promote the application to the civilian industrial sector.

With the rapid development of the automobile industry, the engine engine room temperature increases, the use of modified fuels and strong corrosive engine fuel is increasingly common, Zhi Zhi consulting information, fluorine rubber than ever more widely used in automotive sealing materials. In order to improve the power of the car engine, save fuel, to ensure the safety of car driving, the new fuel injection system appears. In this system, the car from the tank into the engine, and then return to the tank circulation, gasoline and oxygen mixture will produce hydrogen peroxide. The gasoline containing hydrogen peroxide is called "acid gasoline", which softens or hardens a variety of hydrocarbon rubbers. The fluorine rubber will not be exposed to acidic gasoline and deterioration of deterioration.

The use of fluorine rubber:

Fluorine rubber has high temperature, oil resistance, high vacuum and acid and alkali resistance, resistant to a variety of chemical characteristics, has been used in modern aviation, missiles, rockets, space navigation, ships, atomic energy and other cutting-edge technology and automotive, Oil, telecommunications, equipment, machinery and other industrial fields. Mainly used in the automotive and automotive industry, because of its high temperature, oil and resistance to medium performance, mainly to do fluorine rubber seal, fluorine rubber O-ring. Fluorine rubber gasket, fluorine rubber, fluorine rubber sheet, fluorine rubber oil seal, fluorine rubber seals.

Performance of fluorine rubber material:

1, good stability

Viton [2] has a high degree of chemical stability, is currently all the elastomer resistance to the best performance of a kind. 26 type fluorine rubber resistant oil-based oil, diester oil, silicon ether oil, silicic acid oil, resistant to inorganic acid, resistant to organic, inorganic solvents, drugs, etc., only low molecular weight ketones, Ester, intolerance amine, ammonia, hydrofluoric acid, chlorosulfonic acid, phosphoric acid hydraulic oil. The properties of the 23-type fluorophene are similar to those of the 26 type, and it is more unique. It is resistant to strong oxidizing inorganic acids such as fuming nitric acid and concentrated sulfuric acid is better than 26, and is immersed in 98% HNO3 at room temperature. Day its volume expansion is only 13% to 15%.

2, high temperature resistance

Fluorine rubber high temperature performance and silicone rubber, it can be said that the best in the current elastomer. 26-41 fluoro glue can be used at 250 ℃ for a long time, short-term use at 300 ℃; 246 fluorine glue heat better than 26-41. The physical properties of 26-41 after heat aging at 300 ° C for 100 hours are equivalent to those of 246 type after hot air aging at 300 ° C × 100 hours, and the elongation at break is maintained at about 100% and the hardness is 90 to 95 ° C The 246 was maintained at a good temperature after aging at 350 ° C for 16 hours and maintained good elasticity after aging at 400 ° C for 110 minutes. After aging at 400 ° C for 110 minutes, it contained sprayed carbon black, hot cracking carbon black or carbon fiber Of the elongation of the rubber increased by about 1/2 to 1/3, the intensity decreased by about 1/2, still maintain good flexibility. 23-11 type fluoro glue can be used at 200 ℃ for a long time, 250 ℃ short-term use.

3, anti-aging

Fluorine rubber has excellent weather resistance, ozone resistance. It has been reported that VitonA, developed by DuPont, is still satisfactory after ten years of natural storage and has no apparent cracking over 45 days in air with an ozone concentration of 0.01%. 23 type fluorine rubber weather resistance aging, ozone resistance is also excellent.

4, vacuum performance

26 type fluorine rubber has excellent vacuum performance. 246 Fluorine rubber The basic formula vulcanizate vacuum degassing rate is only 37 × 10-6 Torr / s. Cm 2.246 type fluorine rubber has been successfully applied in the vacuum conditions of 10-9 Torr.

5, mechanical properties

Fluorine rubber has excellent physical and mechanical properties. 26 type fluorine rubber generally with the strength of 10 ~ 20MPa between the elongation at break between 150 ~ 350%, tear strength between 3 ~ 4KN / m. 23 type fluorine rubber strength between 15.0 ~ 25MPa, elongation of 200% to 600%, tear strength between 2 ~ 7MPa. In general, the compressive permanent deformation of the fluororubber at high temperatures is large, but if the compression is permanent at the same time from 150 ° C compared to the same conditions, the butadiene and neoprene are larger than the 26 type fluoro gum, 26 type fluorine rubber at 200 ℃ × 24 hours under the compression deformation is equivalent to the small rubber at 150 ℃ × 24 hours of compression deformation.

6, electrical performance

23 type fluorine rubber electrical performance is better, moisture absorption than other elastomers, can be used as a better electrical insulation material. Type 26 rubber can be used at low frequency and low pressure.

7, small ventilation

Fluorine rubber on the gas solubility is relatively large, but the diffusion rate is relatively small, so the overall performance of the permeability is also small. It is reported that 26-type fluorine rubber at 30 ℃ for oxygen, nitrogen, helium, carbon dioxide gas permeability and butyl rubber, butadiene rubber, neoprene, natural rubber is better.

8, low temperature performance

Fluorine rubber low temperature performance is not good, it is due to its own chemical structure, such as 23-11 type Tg> 0 ℃. The actual use of fluorine rubber low temperature performance is usually used brittle temperature and compression cold coefficient to represent. The formula of the compound and the shape of the product (such as thickness) have a greater impact on the brittle temperature, such as the increase in the amount of filler in the formula, the brittle temperature is sensitively deteriorated, the thickness of the product increases, and the brittleness is also susceptible to deterioration.

9, radiation resistance

Fluorine rubber radiation resistance is a relatively poor elastic body, 26-type rubber radiation after the performance of cross-linking effect, 23 type fluorine rubber is the performance of the cracking effect. 246 type fluorine rubber in the air at room temperature radiation in the dose of 5 × 107 Lun under the dramatic changes in the performance of 1 × 107L under the conditions of hardness increased by 1 to 3 degrees, the intensity decreased by 20%, elongation decreased by 30% to 50% , It is generally believed that 246-type fluorine rubber can withstand 1 × 107 Lun, the limit of 5 × 107 Lun.

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ANJI JIAHE FLUOROURUBBER MADE PRODUCTS CO.,LTD is one of the leading China teflon sheet, PTFE sheet, teflon tube, PTFE tube, PTFE membrane manufacturers and suppliers, equipped with a productive teflon sheet factory, we are able to offer you cheap products. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
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