What are the main properties of fluorine rubber? The following high temperature resistant silica gel strip manufacturers to tell you:

Good chemical stability

Fluorine rubber has a high degree of chemical stability, is currently all elastomers in the medium resistance of one of the best. Type 26 fluorine rubber resistant to petroleum based oil, double ester oil, silicone ether oil, silicone acid oil, resistance to inorganic acid, resistance to most organic and inorganic solvents, drugs, only resistance to low molecular ketone, ether, ester, resistance to amine, ammonia, hydrofluoric acid, chlorosulfonic acid, phosphoric acid hydraulic oil. The medium performance of type 23 is similar to that of type 26, and more unique. It has better resistance to strong oxidizing inorganic acids such as fuming nitric acid and concentrated sulfuric acid than type 26, and its volume expansion is only 13%~15% after soaking in 98% HNO3 for 27 days at room temperature.

Excellent high temperature resistance

Fluorine rubber high temperature performance and silicone rubber, can be said to be the best in the current elastomer. 26-41 fluoroadhesive can be used for a long time at 250℃, short-term use at 300℃; Fluoroglue 246 is better than 26-41 in heat resistance. The properties of 26-41 after 300℃×100 h air heating aging are similar to those of 246 after 300℃×100 h air heating aging. The elongation at break can be kept at about 100%, and the hardness is 90~95 degrees. Model 246 keeps good elasticity after aging at 350℃ hot air for 16 hours, and at 400℃ hot air for 110 minutes. After aging at 400℃ hot air for 110 minutes, the elongation of the adhesive containing spray carbon black, hot cracking carbon black or carbon fiber increases by about 1/2 to 1/3, and the strength decreases by about 1/2. It remains resilient. Type 23-11 fluoro glue can be used at 200℃ for a long time, 250℃ for a short time.

Good aging resistance

Fluorine rubber has good weathering resistance and ozone resistance. The DuPont VitonA is reported to have performed satisfactorily after 10 years of natural storage, with no significant cracking after 45 days in air with an ozone concentration of 0.01%. Type 23 fluororubber has good weathering and ozone resistance. Good vacuum performance Type 26 fluororubber has good vacuum performance. The vacuum release rate of vulcanized rubber in the basic formula of 246 fluororubber is only 37×10-6 litre/s. 2 cm. Type 246 fluorine rubber has been successfully applied to vacuum at 10-9 pump temperature.

Excellent mechanical properties

Fluorine rubber has excellent physical and mechanical properties. Type 26 fluorine rubber is generally matched with strong force between 10~20MPa, elongation at break between 150~350%, tear strength between 3~4KN/m. The strength of type 23 fluororubber is 15.0~25MPa, the elongation is 200%~600%, and the tear strength is 2~7MPa. Generally, fluorine rubber at high temperature compression deformation, but if compared with the same conditions, such as from 150℃ at the same time of compression deformation, butadiene and neoprene rubber are larger than 26 type fluorine rubber, 26 type fluorine rubber at 200℃×24 hours of compression deformation is equivalent to butadiene rubber at 150℃×24 hours of compression deformation.

Good electrical performance

Type 23 fluororubber has better electrical properties and lower hygroscopicity than other elastomers, so it can be used as a better electrical insulation material. Type 26 rubber can be used in low frequency and low pressure. The permeability of small fluorine rubber to gas solubility is relatively large, but the diffusion rate is relatively small, so the overall performance of the permeability is also small. According to reports, type 26 fluororubber at 30℃ for oxygen, nitrogen, helium, carbon dioxide gas permeability and butyl rubber, butyl rubber, better than neoprene rubber, natural rubber.

Poor low temperature performance

The low temperature performance of fluorine rubber is poor, which is caused by its own chemical structure, such as Tg > 0℃ of 23-11 type. The actual low temperature performance of fluorine rubber is usually expressed by brittleness temperature and compressive cold resistance coefficient. The formula of rubber and the shape of the product (such as thickness) have a great influence on the brittleness temperature. If the amount of filler in the formula increases, the brittleness temperature is sensitive to deterioration, and the thickness of the product increases, and the brittleness mixing degree is sensitive to deterioration.

Poor radiation resistance

The radiation resistance of fluorine rubber is relatively poor among elastomers. Type 26 rubber shows crosslinking effect after radiation, and type 23 fluorine rubber shows cracking effect. Type 246 fluorine rubber in the air at room temperature radiation at 5×107 lun under the dose of dramatic changes in 1×107 lun under the condition of hardness increased by 1~3 degrees, strength decreased by 20%, elongation decreased by 30%~50%, so it is generally believed that type 246 fluorine rubber can withstand 1×107 lun, the limit is 5×107 lun.

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