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HZD2720-G
HZD2720-G is a high flame-retardant 125°C irradiation cross-linked LSZH compound — with a properly designed construction, finished cable passes the UL VW-1 burn test.
Material / equipment — High flame-retardant irradiation cross-linked LSZH compound
Overview
HZD2720-G is a 125°C halogen-free cable compound with a reinforced flame-retardant package (oxygen index 41 typical), colorable, built on a polyolefin base with inorganic flame retardants, antioxidants and lubricants. It serves electronic equipment wire and metro cable insulation.
Used as both insulation and jacket in a properly designed construction, cable made from HZD2720-G passes the UL VW-1 vertical flame test while keeping smoke density and toxicity far below LSZH limits.
Packaging & Storage
Supplied in aluminum-plastic bags with kraft paper lining, 25 kg net per bag. Store in a dry, well-ventilated warehouse.
Technical data
Typical Properties
| Property | Unit | Requirement | Typical | Test Method |
|---|---|---|---|---|
| Density | g/cm³ | ≤ 1.60 | 1.53 | GB 1033 |
| Tensile strength | MPa | ≥ 10.3 | 12.3 | GB 1040 |
| Elongation at break | % | ≥ 150 | 158 | GB 1040 |
| Thermal aging | °C × h | 168 × 168 | 168 × 168 | GB 2951.7 |
| Tensile strength retention after aging | % | ≥ 70 | 113 | GB 2951.7 |
| Elongation retention after aging | % | ≥ 70 | 87 | GB 2951.7 |
| Volume resistivity (20°C) | Ω·m | ≥ 1×10¹² | 6.32×10¹² | GB 1410 |
| Dielectric strength | MV/m | ≥ 25 | 29 | GB 1408 |
| Oxygen index | % | ≥ 35 | 41 | GB 2406 |
| Flame rating | — | VW-1 | Pass | UL 1581 |
| Smoke density (flaming) | — | ≤ 100 | 75 | GB 8323 |
| Smoke density (non-flaming) | — | ≤ 180 | 136 | GB 8323 |
| Toxicity index | — | ≤ 5 | 1.7 | NES 713 |
| pH | — | ≥ 4.3 | 6.1 | IEC 60754-2 |
| Conductivity | μS/mm | ≤ 10 | 1.3 | IEC 60754-2 |
| Brittleness temperature | °C | < −25 | < −25 | GB 5470 |
| Shore hardness A (D) | — | — | 95 (54) | GB 2411 |
* Typical values are measured on production samples and provided for reference only — they are not a specification guarantee. Request the official TDS for binding limits.
Use cases
Applications
- —Electronic and electrical equipment wire
- —Metro and transit cable insulation
- —Jacket and insulation for VW-1 rated cable designs
- —Fire-safety wiring in enclosed public spaces
Process notes
Processing Recommendations
- —Recommended equipment: φ45–150 single-screw extruder, L/D ≥ 20, screen pack 20/80/20 mesh
- —A dedicated halogen-free screw with compression ratio below 2.5 improves output and surface quality
- —Temperature profile: feed 110°C / transport 125°C / melting 140°C / die 140–150°C — trim die temperature to wire surface finish
- —Irradiation dose: 60–100 kGy (6–10 Mrad)
Where it's used
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Inquiry
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