Nitrile rubber O-ring seal, physical and chemical properties and application of O-ring

Hydrogenated Nitrile Rubber O-Ring seal(HNBR)

(1) Molecular structure
(CH2-CH2)( CH2-CH)( CH=CH)


(2) Theoretical performance
Hydrogenated Nitrile Rubber O-ring The sealing ring is obtained by selectively hydrogenating the butadiene group in nitrile rubber. Hydrogenated nitrile rubber O-ring The performance of the sealing ring depends on the content of CAN (18%-50%) and the saturation of carbon-carbon bonds. Its main features are: good heat resistance, organic peroxide vulcanized material can be used continuously for more than 1000 hours at 160 ℃ air, while NBR loses its continuous use value at 150 ℃; excellent oil resistance, both fuel and alcohol-based fuel performance. It is much better than the corresponding NBR and NBR/PVC blend materials; its low temperature resistance is better than that of NBR; its ozone aging resistance and resistance to various media (hot water, acid, alkali, alcohol) are outstanding. Its mechanical properties are also better than ordinary NBR. Has better corrosion resistance, tensile, tear and compression set properties.
(3) Temperature range
General grade: -40℃~150℃ (TR10-22~-24℃)
Low temperature resistance grade: -55~150 ℃ (TR10-35~-37 ℃)

(4) Hardness range
Shore 55 to 90 degrees

(5) Color
Black, green, blue, brown, reddish brown, gray, also can be specified by customers

(6) Application
HNBR is widely used in the automotive and refrigeration industries. It can be used as engine system Seals and other seals in contact with fuel, and is also an ideal material for making engine timing belts, V-ribbed belts, and variable-speed V-belts. For the requirements of ecological environment protection, the old refrigerant R22 is gradually replaced by the new refrigerant. In the past, neoprene or fluororubber seals were usually used, but in new refrigerants such as R134a, 410A and 407C, hydrogenated nitrile rubber is also very widely used. In the nuclear industry, hydrogenated nitrile rubber can also be used for seals in nuclear power plants due to its radiation resistance.