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各种橡胶配方-非常齐全
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Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content varies in commercial products from 18% to 50%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.&
About Nitrile / NBR:
Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -35°C to +120°C (-30°F to +250°F), Nitrile /NBR is the most widely used elastomer in the seal industry today. Also many military rubber specifications for fuel and oil resistant O-rings require nitrile based compounds. It should be mentioned that to obtain good resistance to low temperature, it is often necessary to sacrifice some high temperature resistance. Nitrile compounds are superior to most elastomers with regard to compression set, tear, and abrasion resistance. Nitrile compounds do not possess good resistance to ozone, sunlight, or weather. They should not be stored near electric motors or other ozone generating equipment.&
Nitrile / NBR usage:
They should be kept from direct sunlight. However, this can be improved through compounding. NBR is the standard material for hydraulics and pneumatics. NBR resists oil-based hydraulic fluids, fats, animal and vegetable oils, flame retardant liquids (HFA, HFB, HFC), grease, water, and air. Special low-temperature compounds are available for mineral oil-based fluids. By hydrogenation, carboxylic acid addition, or PVC blending, the nitrile polymer can meet a more specified range of physical or chemical requirements.
The quality of Nitrile-compounds depends on the percentage of acrylonitrile in the base polymer. The following table indicates the change of properties as a function of acrylonitrile content.
For more&information on Nitrile / NBR&or one of our other o-ring materials please&&or fill the “Ask ERIKS” form on the upper-right corner.
Compound number
Hardness IRHD ±5
Description / Application
Certificates
Nitrile-NBR
with medium ACN content, Excellent resistance to aliphatic hydrocarbons, mineral oils, greases, vegetable and animal oils/greases, heating oil and diesel fuel
-30 / +120
Excellent resistance to aliphatic hydrocarbons, mineral oils, greases, vegetable and animal oils, heating oil and diesel fuel.
FDA 177-2600 ADI, 3A, EC, metal detectable
-30 / +120
Nitrile-NBR
with medium percentage of acrylonitrile. Standard compound with good compression set values for contact with hydraulic fluids
-30 / +120
Nitrile-NBR
with medium percentage of Acrylonitrile/ Migration tested
FDA&177.2600
ADI, 3A, EC
-25 / +120
Nitrile-NBR
Nitrile compound with medium percentage of Acrylonitrile. Good compression set values for contact with gasses and hydraulic fluids
EN 549 B1 H3
-30 / +120
Nitrile-NBR
a medium Nitrile compound for industrial use. It is the standard cord compound.
-30 / +115
for gas applications
DVGW/EN549
-30 / +130
Nitrile-NBR
designed for the automotive industry
VW 2.8.1-A70
-30 / +120
Nitrile-NBR
designed for the automotive industry
VW 2.8.1-C70
-30 / +120
Nitrile-NBR
designed for the contact with ozone and preserving the good NBR-quality in contact with oils
-30 / +100
Nitrile-NBR
Nitrile compound with medium percentage of acrylonitrile. Standard compound with good compression set values for contact with hydraulic fluids
-30 / +120
with medium percentage of ACN. Cure system is sulphur
-20 / +120
With medium percentage of ACN. Cure system is Peroxide.
FDA 177.2600 3A class II
-30 / +120
Nitrile-NBR
Nitrile compound with medium percentage of Acrylonitrile
FDA 177.2600, ADI, EC
-30 / +120
Nitrile-NBR
medium percentage of Acrylonitrile. Standard compound with good compression set values for contact with hydraulic fluids
-30 / +120
Nitrile-NBR
with medium percentage of Acrylonitrile
FDA 177.2600
-30 / +120
Nitrile-NBR
with medium percentage of Acrylonitrile. Standard compound with good compression set values for contact with hydraulic fluids
-30 / +120
Nitrile-NBR
with medium percentage of Acrylonitrile
FDA 177.2600
-30 / +120
Ideal for Vulc-O-ring
-20 / +120
For more&information on Nitrile / NBR&or one of our other o-ring materials please&&or fill the “Ask ERIKS” form on the upper-right corner.
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