Low-Friction Nitrile Butadiene Rubber(LF-NBR)

Operation temperatures are recommended from -40 to 100℃ (short periods of time up to 120℃).

TTO successfully developed Low-Friction Material in 2015, which not only improved the operator experience, also maintained the sealing ability. Low-Friction Material can effectively reduce abrasion and doesn’t get as hot as NBR during use, giving it a longer lifespan.

LF-NBR is recommended to use on:

Electric Vehicle Motors(Reduce load)
Robotic Arm
Shock Absorber
Rotary & Reciprocating Application

 

Nitrile Butadiene Rubber (NBR)

Operation temperatures are recommended from -35 to 100℃ (short periods of time up to 120℃).

NBR is most commonly used material (NBR-1 series). It has good heat resistance properties, good resistance to oils, salt solutions, and hydraulic oils. General purpose compounds with a 34% ACN content. Higher ACN content provides improved solvent, oil and abrasion resistance, along with higher temperature. The low temperature can be improved by reducing the ACN content. Unfortunately the best low properties are usually affected by high temperature.

TTO also provides with several other grade compounds for different applications: NBR-2,-3,

-4,-5,-6,-7,-8,...etc.

The disadvantage is poor chemical resistance (Esters, Ketones, strong acids).

It should not used in automotive brake fluid.

 

Hydrogenated Nitrile Butadiene Rubbe (HNBR)

Operation temperatures are recommended from -40 to 150℃

HNBR results from the hydrogenation of standard NBR. Adding hydrogen improves the resistance to fuel, heat, and chemicals. HNBR is finding wider use as an alternative to FKM.

 

PolyAcrylate Rubber (PA, ACM)

Operation temperatures are recommended from -20 to 150℃.

PolyAcrylate Rubber has better heat resistance than Nitrile. It is recommended for high surface speed environment. The auto industry uses in automatic transmissions. It should not be used with water or in temperature below -20℃. 

 

Ethylene Acrylate (AEM, Vamac)

Operation temperatures are recommended from -30 to 150℃. 

Better known as Vamac, offers exceptional resistance to Ozone, sunlight and heat. It performs well in automatic transmission application which can be an alternative to ACM.

 

Silicone Rubber (SI, VMQ)

Operation temperatures are recommended from -50 to 180℃.

Silicone Rubber is unsurpassed in its resistance to heat and low temperatures. It is usually used for crank shaft seals. The high lubricant absorbency of silicone minimizes abrasion and tear. Silicone has poor hydrolysis resistance. It should not be used in oxidized or hypoid oils.

 

Fluorinated Rubber (FKM, VI)

Operation temperatures are recommended from -25 to 200℃.

Fluorinated rubber is widely known under the DuPont trade name of Viton^Ⓡ. Depending on specific needs of application, there are different types formulations available (Copolymer & Terpolymer). General purpose copolymer with 66% fluorine offers excellent resistance to chemicals, oil and superior performance to high temperatures. Terpolymer with 68% fluorine offers with better fluids resistance.

Though FKM provides so many good prospects, it has the highest cost.

 

Tetrafluoroethylene (PTFE, Teflon)

Operation temperatures are recommended from -50 to 250℃.

Teflon seals are designed for high peripheral speeds, pressure, temperature, and aggressive chemical media. Graphite and Fiberglass filled PTFE offers low friction and long wear life.

Teflon can handle temperatures ranging from -50 to 250℃.

Proper installation tools must be used to prevent damaging the sealing areas.