HNBR (hydrogenated nitrile, hydrogenated acrylonitrile-butadiene rubber)

HNBR is a rubber, obtained by binding hydrogen onto acrylonitrile-butadiene rubber. It has similar features to NBR, however it is much more resistant to high temperatures and oxidation. Its wear resistance and high mechanical durability are also improved. It is widely used in the food and pharmaceutical industries due to these positive characteristics. Because of high fat content in dairy products, EPDM had to be replaced with HNBR in their production.

Usage:

O-rings, seals, products resistant to oil, oils, food processing and pharmaceutical industry, automotive industry.

Advantages:

• resistant to animal and vegetable oils, water and steam,
• resistant to disinfectants, polar and organic solvents, diluted acids and alkaline solutions,
• better oxidative and thermal stability than NBR,
• better wear resistance,
• higher mechanical strength,
• increased resistance to ozone and aging.

Disadvantages:

• reduced elasticity at low temperatures.

Temperature resistance: from – 45 °C to 150 °C.

Hardness: 45 to 98 Shore A.