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Polyhedron Laboratories performs testing on NBR raw material and products. Our lab offers a complete range of tests on any of the properties of NBR. In addition, Polyhedron tests can:
Polyhedron's tests meet ASTM testing standards.
NBR is a family of unsaturated copolymers of acrylonitrile and butadiene rubber. By varying the ratio of acrylonitrile content in the compound, the manufacturer can create a custom product to meet application requirements that require fuel, oil or chemical resistance. NBR products are used for fuel, oil and hydraulic hoses, seals, grommets, belting and roll covers in the automotive, plumbing and appliance industries.
There are five general types of NBR.
The table below contains the key properties of NBR as well as the ASTM test methods that Polyhedron Laboratories adheres to.
PROPERTIES | ASTM TEST METHOD | 41% ACRYLONITRILE | 21% ACRYLONITRILE |
---|---|---|---|
Density (g/cm3) |
ASTM D 790 |
|
0.92 |
Tensile strength, psi |
D412 |
3200 |
3055 |
% Elongation |
D412 |
380 |
390 |
100% Modulus, psi |
D412 |
300 |
355 |
300% Modulus, psi |
D412 |
1750 |
2130 |
Tear Strength, Die C (lb/in) |
D624 |
|
209 |
Hardness, Shore A |
D2240 |
66
|
62 |
Glass Transition Temperature °C |
D5026 |
-18 |
-60 |
Compression Set (%), 70 hrs./125°C |
D395B
|
34 |
38 |
Brittleness Temperature °C |
D746 |
-20
|
-45 |
Water Resistance (%), 70 hrs/ 23°C, % Volume Change |
D471 |
+11
|
+5 |
Oil Resistance, 70 hr/ 100°C , % Volume Change |
No. 3 |
-10 |
+49 |
Click here to view a list of some of the other types of rubber we commonly test.
Request Testing Quote today from Polyhedron Laboratories
or call us at 281.879.8600