HZD1600
125 °C halogen-free flame-retardant heat shrink tube compound
Overview
HZD1600 is a fully halogen-free, 125 °C irradiation cross-linked flame-retardant heat shrink tube master compound developed for increasingly strict environmental regulations. Based on a polyolefin matrix with inorganic flame retardants, it is colourable and produces UL / CSA and UL224 tubing with low smoke, low toxicity and no corrosive halogen gas — for cable joints, terminations, component insulation and bundling.
Key features
- Halogen-free, low smoke and low toxicity
- 125 °C irradiation cross-linked, FT2 flame rating
- Inorganic flame-retardant system, colourable
- Suitable for UL / CSA and UL224 heat shrink tubing
- Runs best on a low-compression halogen-free screw
Typical applications
Specifications
Typical values from LSZH sample testing.
| Property | Typical value | Unit | Test method |
|---|---|---|---|
| Density | 1.34 | g/cm³ | GB 1033 |
| Tensile strength | 14.5 | MPa | GB 1040 |
| Elongation at break | 375 | % | GB 1040 |
| Tensile retention after ageing (156 °C × 168 h) | 114 | % | GB 2951.7 |
| Volume resistivity (20 °C) | 3.2 × 10¹² | Ω·m | GB 1410 |
| Dielectric strength | 29 | MV/m | GB 1408 |
| Oxygen index | 29 | % | GB 2406 |
| Flammability | FT2 — Pass | UL1581 | |
| Smoke density (flaming / non-flaming) | 86 / 154 | GB 8323 | |
| Toxicity index | 2.2 | NES 713 | |
| pH | 5.3 | IEC 60754-2 | |
| Brittleness temperature | < -25 | °C | GB 5470 |
| Shore hardness A (D) | 91 (46) | 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
- 50–80 kGy (5–8 Mrad)
Recommended machinery
Single-screw extrusion line (φ45–150)
Halogen-free screw, compression ratio < 2.5
Heat shrink tube expansion line
Interested in HZD1600?
Send your specification for a recommendation, sample and quotation. Our engineering team typically responds within 24 hours.