Accelerated irradiation cross-linking molding results in a dense molecular structure, offering resistance to frequent thermal cycling, wide temperature ranges, vibration, abrasion, and compression tearing. It exhibits outstanding oil, acid, and alkali corrosion resistance, low smoke and toxicity, high flame retardancy, and low smoke density, making it suitable for enclosed vehicle and tunnel environments. Specifically designed for traction and signaling cables in trains and subways, it meets the stringent fire safety and safety standards of rail systems.
| No. | Test Item | Unit | Standard | Typical Values | ||||
| DS-WDZF-105 (GD) | DS-WDZF-125 (GD) | |||||||
| 1 | Specific Gravity | g/cm³ | / | 1.48 | 1.47 | |||
| 2 | Tensile Strength | MPa | ≥10.0 | 13.5 | 13.8 | |||
| 3 | Elongation at Break | % | ≥150 | 165 | 170 | |||
| 4 | Oxygen Index | % | ≥28 | 32 | 32 | |||
| 5 | Air Thermal Aging | Tensile Strength Change Rate | % | ±25 | 135℃ 168h | +10 | 158℃ 168h | +12 |
| Elongation Change Rate | % | ±25 | -8 | -15 | ||||
| 6 | Hot Extension (200℃, 0.2MPa, 15min) |
Elongation under Load | % | ≤100 | 55 | 45 | ||
| Permanent Deformation after Cooling | % | ≤25 | 0 | 0 | ||||
| 7 | Smoke Density | With Flame | / | ≤100 | 55 | 50 | ||
| Without Flame | / | ≤350 | 325 | 320 | ||||
| 8 | Volume Resistivity at 20℃ | Ω·cm | 1.0×10¹⁴ | 4.5×10¹⁴ | 5.0×10¹⁴ | |||
| 9 | Dielectric Strength | MV/m | ≥20 | 30 | 30 | |||
| 10 | Impact Brittleness Temperature | ℃ | -25 | Pass | Pass | |||
| 11 | pH Value | / | ≥4.3 | 5 | 5 | |||
| 12 | HCl and HBr Content | % | ≤0.5 | <0.5 | <0.5 | |||
| 13 | Electrical Conductivity | uS/mm | ≤10 | 0.52 | 0.52 | |||
| *The above indicators are the performance parameters of this product after cross-linking. | ||||||||
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