A high-speed tangential belt, also known as a polyamide-based high-speed drive belt, is a new type of flat belt, with high strength nylon core as the skeleton material. and as the tensile layer, and with high wear-resistant synthetic rubber as the surface friction layer. Using mature joint technology, so the operation is relatively stable. It is widely used in precision machine tools and high-speed transmission machinery.
High efficiency and low elongation
High fatigue resistance and flexibility
Good anti-static property
The friction coefficient of stability
Type | Thickness（mm) | Minimum pulley diameter (mm) | Extend the tension by 1%(N/mm)
| Maximum tension(N/mm) | Core thickness(mm) |
DH-15 | 1.5 | 25 | 3.5 | 9 | 0.4 |
DH-18 | 1.8 | 35 | 4.5 | 12 | 0..6 |
DH-22 | 2.2 | 60 | 7.5 | 17 | 1.0 |
DH-24 | 2.4 | 70 | 9.0 | 23 | 1.0 |
DH-25 | 2.5 | 70 | 17.0 | 47 | 1.0 |
DH-30 | 3.0 | 100 | 11.0 | 25 | 1.2 |
DH-31 | 3.1 | 150 | 15.0 | 38 | 1.5 |
DH-34 | 3.4 | 150 | 15.0 | 38 | 1.5 |
DH-38 | 3.8 | 180 | 17.0 | 38 | 1.5 |
High speed tangential belt is especially suitable for high speed transmission in textile industry, such as air suction, air spinning, carding machine, twister, stretch yarn machine, covering yarn machine, extra-long ring spinning, fancy twisting machine, knitting machine and so on.
Cause Analysis:
1. High content of low boiling matter;
2. Oxidative degradation of glue, containing acid and alkali
Measures:
1. The temperature and time must be guaranteed when vacuuming;
2. When removing low boiling substances from raw rubber, it is necessary to reach the process temperature and time to remove all acids and alkalis;
3. The use of additives should prevent acid and alkali, and ensure neutrality;
4. The exhaust of the oven for secondary vulcanization should be good to prevent oxidative degradation;
5. Use hardening agent.
Cause Analysis:
1. Less dispersant;
2. The hydroxyl content in the dispersant is too low;
3. The molecular weight of raw rubber is high and the molecular weight distribution is too narrow;
4. Excessive branching of raw rubber chains increases the steric hindrance effect;
5. Poor equipment shear;
6. The addition of carbon black is out of proportion to the amount of additives;
7. The temperature is too low
Measures:
1. Add dispersant (most feasible);
2. The test results of the dispersant should be accurate;
3. The molecular weight distribution should be uniform, and the dispersant dosage should be adjusted;
4. Reduce chain branching and reduce steric hindrance effect (feasible, limited);
5. When feeding, add in proportion to the dispersant;
6. Properly increase the temperature (feasible)
