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HZD1600
HZD1600 is a 125°C halogen-free, low-smoke flame-retardant heat-shrink masterbatch — colorable, mineral flame-retardant system, FT2 rated, for UL 224 compliant tubing.
Material / equipment — Halogen-free irradiation cross-linked heat-shrink masterbatch
Overview
HZD1600 is a 125°C halogen-free flame-retardant heat-shrink masterbatch developed for increasingly strict environmental regulations. It is colorable, built on a polyolefin base with inorganic flame retardants, antioxidants and lubricants, melt-mixed and pelletized. Tubes produced from it meet UL 224 and serve cable connection, pipe connection, component insulation and wire bundling.
In a fire the material releases very little smoke, no halogen acid and low-toxicity fumes (toxicity index 2.2 typical), which makes it the choice for tubing used in metros, data centers and other enclosed public spaces.
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 | ≤ 1.40 | 1.34 | GB 1033 |
| Tensile strength | MPa | ≥ 13.8 | 14.5 | GB 1040 |
| Elongation at break | % | ≥ 300 | 375 | GB 1040 |
| Thermal aging | °C × h | 156 × 168 | 156 × 168 | GB 2951.7 |
| Tensile strength retention after aging | % | ≥ 70 | 114 | GB 2951.7 |
| Elongation retention after aging | % | ≥ 70 | 94 | GB 2951.7 |
| Volume resistivity (20°C) | Ω·m | ≥ 1×10¹² | 3.2×10¹² | GB 1410 |
| Dielectric strength | MV/m | ≥ 25 | 29 | GB 1408 |
| Oxygen index | % | ≥ 25 | 29 | GB 2406 |
| Flame rating | — | FT2 | Pass | UL 1581 |
| Smoke density (flaming) | — | ≤ 100 | 86 | GB 8323 |
| Smoke density (non-flaming) | — | ≤ 180 | 154 | GB 8323 |
| Toxicity index | — | ≤ 5 | 2.2 | NES 713 |
| pH | — | ≥ 4.3 | 5.3 | IEC 60754-2 |
| Conductivity | μS/mm | ≤ 10 | 1.2 | IEC 60754-2 |
| Brittleness temperature | °C | < −25 | < −25 | GB 5470 |
| Shore hardness A (D) | — | — | 91 (46) | 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
- —Halogen-free heat-shrink tubing to UL and CSA standards
- —Cable joints and pipe connections in confined public spaces
- —Insulation sleeves for electronic components
- —Bundling of stranded wires
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 tube surface finish
- —Irradiation dose: 50–80 kGy (5–8 Mrad)
Where it's used
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Inquiry
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