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We use NBR as the main part of belt cover. NBR has a high content of acrylonitrile. We use cotton, NN or EP canvas as belt tension element. This belt is suitable for transporting oily materials, and for working conditions with operating oil.
This belt has advantages of low rate of volume change, high retaining rate of tensile strength, wide usage.
Physical and Mechanical Properties of Rubber Cover:
|
Type |
Tensile Strength/Mpa |
Breaking elongation/% |
Abrasion loss/ mm3 |
| LO | ≥14.0 | ≥350 | ≤200 |
| DO | ≥16.0 | ≥350 | ≤160 |
|
Note：LO-conveyor belt used in general working conditions; DO-conveyor belt used in high abrasion & oil working conditions. |
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Oil Resistant Properties of Rubber Cover:
|
Serial number |
Test conditions of soak liquid |
Volume change rate/%≤ |
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|
Oil number in GB/T1690 |
Soak temperature/℃ |
Soak time/h |
LO | DO | |
| 1 |
#2 oil |
70±2 |
70 +0/-1 |
+20 | -5 |
| 2 |
#3 oil |
70±2 |
70 +0/-1 |
+50 | +5 |
| 3 |
#3 oil |
100±2 | 22±0.25 | +50 | +5 |
|
Note：You only need to choose one of the above three methods. |
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