Flame Resistant for Underground Mining
Our steel cord conveyor belts are distinguished by their extremely high transmission of forces, long lengths and very high load-carrying capacities.
Our rubber engineers have develop a wide range of flame-resistant and anti-statics compound, in addition to satisfying underground requirement. The fire Resistance Conveyor Belt In Coal most.
ST Fire Resistant Conveyor Belt
Standard of Flame Resistant
Belt Property:
- Tensile Strength: ≧ 15MPa
- Elongation: ≧ 350%
- Ageing Test: (70°C x 168h)
- Tensile Strength Rate: ±25%
- Elongation Strength Rate: ±25%
- Din: ≦ 200mm3
Cord Rubber Compound Penetration:
- The average steel belts of adhesion strength does not less than 85% after aging.
- In cover rubber and adhesive layer, the average of adhesion strength does not less than 10 KN/M.
- Containing fabric in flame resistant steel cord belts, the average of adhesion does not less than 8 KN/M in rubber cover and adhesion.
Rubber Permeability:
- 100kPa pressure is applied to both edge in the test pieces, with 60 seconds, the difference does no more than 5kPa.
Adhesion of Steel Cord Belts:
- 10,000 times cycle test, steel cord belts without any pull-out phenomenon.
Burning Test
| Item | Standard | |||
|---|---|---|---|---|
| Electrical Resistance | Electrical Resistance | ≦ 3 x 108 | ||
| Drum Friction Test | Drum surface temperature. | ≦ 325 | ||
| Test pieces shall not show not sign of flame. | ||||
| Finger Burn Test S = sec |
With Covers | The self-extinguish average time of six samples (S) | ≦ 3 | |
| The self-extinguish time of one sample (S) | ≦ 10 | |||
| Wihout Cover | The self-extinguish average time of six samples (S) | ≦ 5 | ||
| The self-extinguish time of one sample (S) | ≦ 15 | |||
| Gallery Test | Test result confort to (a) or (b) | (a) | Each Samples Undamaged Length (mm) | ≧ 600 |
| (b) | Each Samples Undamaged Length (mm) | ≧ 50 | ||
| Max. Average Temperature (°C) | ≦ 140 | |||
| Damaged Length (mm) | ≦ 1250 | |||
Thickness of Flame Resistant Rubber
| Designation | ST630 | ST800 | ST1000 | ST1250 | ST1600 | ST1800 | ST000 | ST2500 | ST2800 |
|---|---|---|---|---|---|---|---|---|---|
| Top Cover ≧ | 5.0 | 5.0 | 6.0 | 6.0 | 6.0 | 8.0 | 8.0 | 8.0 | 8.0 |
| Bottom Cover ≧ | 5.0 | 5.0 | 6.0 | 6.0 | 6.0 | 8.0 | 8.0 | 8.0 | 8.0 |
| Designation | ST3150 | ST3500 | ST4000 | ST4500 | ST5000 | ST5400 | ST6300 | ST7000 | ST7500 |
| Top Cover ≧ | 8.0 | 8.0 | 8.0 | 8.0 | 8.5 | 9.0 | 10.0 | 10.0 | 10.0 |
| Bottom Cover ≧ | 8.0 | 8.0 | 8.0 | 8.0 | 8.5 | 9.0 | 10.0 | 10.0 | 10.0 |