The physical properties and the performance of the O type of fluorine rubber
Excellent high temperature resistance
Fluorine rubber O ring performance and high temperature silicone rubber, fluorine rubber O ring can be said to be the best.26-41 fluorine rubber elastomer under 250 degrees can be used for a long time, under 300 DEG C for short-term use; 246 fluorine rubber heat better than 26-41. The performance of physical aging at 300 x 100 26-41 after 300 hours of hot air and c * 100 hours after heat aging type 246, the elongation can be maintained at around 100%, hardness 90~95 degree.246 after aging for 16 hours at 350 DEG C hot air to maintain good elasticity, aging after 110 minutes to maintain good elasticity at 400 DEG C hot air after 400 DEG C hot air aging for 110 minutes, containing spray carbon black, hot crack rubber elongation method, carbon black or carbon fiber increased by about 1/2~1/3, decreased about 1/2, fluorine rubber O ring remains elastic.23-11 type fluorine rubber good can be used for a long time under 200 degrees, 250 degrees to the short-term Use.
Good ageing resistance
Fluorine rubber O - ring has excellent weather resistance aging resistance and ozone resistance. Reportedly, DuPont developed Viton natural storage for ten years after the performance remained satisfactory, in the ozone concentration of 0.01 percent of the air after 45 days effect is not obvious cracks. Fluoro rubber weather resistance, aging resistance, ozone resistance, is excellent.
Excellent vacuum performance
Type 26 fluorine rubber O - ring have excellent basic formulations of vacuum performance.246 fluorine rubber vulcanizates vacuum outgassing rate is only 37 x 10-6 Torr liters / sec. Cm 2.246 type fluorine rubber has been successfully applied in 10-9 Torr vacuum conditions.
Good mechanical properties
To 2~7MPa conditions in between 15.0~25MPa. Between 3~4KN/m 150~350% in 10~20MPa fluorine rubber fluorine rubber O ring has excellent physical and mechanical properties. With the strength, elongation at break, tear strength in fluorine rubber strength, elongation, tear strength in between. In general, fluorine rubber O - ring in the high temperature compression permanent deformation, but if in the same conditions, such as from 150 DEG C under the same time compression permanent deformation, Ding and chloroprene rubber were more than 26 fluorine rubber, 26 fluorine rubber in 200 DEG C x 24 small current compression deformation as the rubber in 150 DEG C * 24 hours of compression deformation.

Better electrical performance

The electrical properties of the O type 23 type fluorine rubber is good, and the moisture absorption property is lower than other elastomers, which can be used as a good electrical insulating material. 26 type rubber can be used in low frequency and low pressure.

Small permeability

Fluorine rubber O ring on the gas solubility is relatively large, but the diffusion rate is relatively small, so the overall performance of the permeability is small. According to reports, 26 types of fluorine rubber for oxygen, nitrogen, helium, carbon dioxide gas permeability and butyl rubber, butyl rubber, rubber, rubber, rubber, rubber, rubber, rubber, rubber, rubber, rubber, rubber, rubber, natural rubber.

Low temperature performance is not good

The low temperature performance of O type of fluorine rubber is not good, which is due to the chemical structure of its own, such as Tg type 23-11 > 0. The low temperature performance of the actual use of fluorine rubber is usually expressed by the brittle temperature and the compression coefficient of cold resistance. Compound formulation and product shape (such as thickness) effect on the brittle temperature are relatively large, such as increasing the amount of filler in the formula is the brittle temperature sensitive to deterioration, increasing the thickness of the product, brittle confusion also sensitive to worse.

Poor radiation resistance

The radiation resistance of the O type of fluorine rubber is relatively poor in the elastomer, and the radiation effect of the 26 type rubber is shown as the crosslinking effect, and the 23 type of fluorine rubber shows the cracking effect. Fluororubber 246 in air at room temperature radiation at a dose of 5 x 107 Lun performance dramatically, in 1 x 107 Lun condition hardness increased 1 ~ 3 degrees, the strength decreased below 20%, elongation at break decreased by 30% ~ 50%. Therefore, it is generally believed that 246 fluororubber can resistant to 1 x 107 Lun, the limit up to 5 x 107 Lun.

Excellent high temperature resistance

The high temperature resistance of the O type rubber ring is the same as that of the silicone rubber, which can be said to be the best one in the elastomer at present. 26-41 fluorine plastic can be used for a long time at 250 degrees C, 300 C under the short term use; 246 fluorine rubber heat better than 26-41. In 300 DEG C x 100 hours of hot air aging 26-41 properties and 300 DEG C x 100 hours of hot air aging after 246 type of performance, the elongation at break can be maintained at around 100% and hardness of 90 to 95 degrees. Type 246 in 350 DEG C hot air aging 16 hours keep good elasticity, at 400 DEG C hot air aging 110 minutes after keep good elasticity, at 400 DEG C hot air aging 110 minutes, containing carbon black spray, thermal crack method carbon black or carbon fiber sizing elongation increased by about 1 / 2 ~ 1 / 3, the strength decreased about 1 / 2 and still maintain good flexibility. 23-11 type fluorine plastic can be used at 200 degrees Celsius for a long time, 250.