HZD2720-G
High flame-retardant 125 °C low-smoke halogen-free cable compound
Overview
HZD2720-G is a high flame-retardant, 125 °C low-smoke halogen-free irradiation cross-linked cable compound. Colourable and polyolefin-based with an inorganic flame-retardant system, it reaches a high oxygen index so that well-designed cables using it as insulation or sheath can pass the UL VW-1 test — ideal for electronic wire and metro / subway cable insulation.
Key features
- High flame retardancy — passes UL VW-1 in proper designs
- 125 °C low-smoke halogen-free, cross-linked
- High oxygen index (41%), low smoke and toxicity
- Colourable, smooth extrusion finish
- For insulation and sheathing of demanding 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 | 12.3 | MPa | GB 1040 |
| Elongation at break | 158 | % | GB 1040 |
| Tensile retention after ageing (168 °C × 168 h) | 113 | % | GB 2951.7 |
| Volume resistivity (20 °C) | 6.32 × 10¹² | Ω·m | GB 1410 |
| Dielectric strength | 29 | MV/m | GB 1408 |
| Oxygen index | 41 | % | GB 2406 |
| Flammability | VW-1 — Pass | UL1581 | |
| Smoke density (flaming / non-flaming) | 75 / 136 | GB 8323 | |
| Toxicity index | 1.7 | NES 713 | |
| Brittleness temperature | < -25 | °C | GB 5470 |
| Shore hardness A (D) | 95 (54) | 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
- 60–100 kGy (6–10 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-G?
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