HZD2720-EV
Oil-resistant 125 °C low-smoke halogen-free EV / rolling-stock cable compound
Overview
HZD2720-EV is a 125 °C oil-resistant, low-smoke halogen-free irradiation cross-linked cable compound. It combines excellent oil resistance and flexibility with good mechanical strength and elongation, passes the single-conductor vertical flame test, and suits oil-exposed applications such as rolling-stock and locomotive cables, meeting GB 12528.11:2003.
Key features
- Excellent oil resistance and flexibility
- 125 °C low-smoke halogen-free, cross-linked
- Passes single-conductor vertical flame test
- High oxygen index (42%) for strong flame retardancy
- Suited to rolling-stock, locomotive and oil-exposed cables
Typical applications
Specifications
Typical values from LSZH sample testing.
| Property | Typical value | Unit | Test method |
|---|---|---|---|
| Density | 1.53 | g/cm³ | GB 1033 |
| Tensile strength | 11.8 | MPa | GB 1040 |
| Elongation at break | 168 | % | GB 1040 |
| Tensile retention after ageing | 107 | % | GB 2951.7 |
| Oil resistance — 100 °C × 70 h (#20 oil), TS change | 25 | % | GB/T 2951.5 |
| Oil resistance — 100 °C × 70 h (#20 oil), EB change | 11 | % | GB/T 2951.5 |
| Volume resistivity (20 °C) | 5.71 × 10¹² | Ω·m | GB 1410 |
| Dielectric strength | 29 | MV/m | GB 1408 |
| Oxygen index | 42 | % | GB 2406 |
| Single-conductor vertical flame | Pass | GB/T 18380.1 / UL1581 | |
| Toxicity index | 1.8 | NES 713 | |
| Shore hardness A | 77 | GB 2411 |
Typical values from LSZH sample testing; reference only, not guaranteed minimum/maximum.
Processing guidance
- Recommended equipment
- φ45–150 single-screw extruder
- Length-to-diameter ratio (L/D)
- ≥ 20
- Filter screen (mesh)
- 20 / 80 / 20
- Temperature profile (feed / transport / melt / die)
- 110 / 125 / 140 / 140–150 °C
- Irradiation dose
- 150–180 kGy (15–18 Mrad)
Recommended machinery
Cable extrusion line (φ45–150 single screw)
Halogen-free screw, compression ratio < 2.5
Irradiation cross-linking (electron beam)
Interested in HZD2720-EV?
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