XLPE
Cross-Linked Polyethylene
XLPE (Cross-Linked Polyethylene) is polyethylene that has undergone crosslinking to achieve significantly improved thermal resistance, mechanical properties and chemical resistance.
Product name: XLPE (Cross-Linked Polyethylene)
Description
XLPE is produced by peroxide, silane or radiation crosslinking of LDPE or HDPE. Crosslinking creates a 3D network that prevents flow at elevated temperatures, improving thermal class (90°C–150°C) and environmental stress crack resistance. Widely used as cable insulation and pipe material.
Applications
XLPE is used in high-voltage cable insulation, automotive wire, heating pipes (PEX), heat-shrink tubing and industrial insulation.
Wire & cable insulation
HV cables
Automotive wiring
Industrial cables
| Property | Test conditions | Unit | Standard | 4201 12 kV (Um=17.5 kV) |
4201C up to 69 kV (Um=72.5 kV) |
4201S up to 161 kV (Um=170 kV) |
4201SC up to 230 kV (Um=245 kV) |
4201EHV >230 kV (Um=550 kV) |
|---|---|---|---|---|---|---|---|---|
| Density | — | kg/m³ | ISO 1872-2; ISO 1183 |
922 | 922 | 922 | 922 | 922 |
| Bulk density | — | kg/m³ | — | 500–600 | 500–600 | 500–600 | 500–600 | 500–600 |
| Residue after alcohol wash | — | ppm | TMW | <2000 | <2000 | <1500 | <1000 | <1000 |
| MFR (max.) | 190°C / 2.16 kg | g/10 min | ISO 1133 | 2 | 2 | 2 | 2 | 2 |
| Elongation at break | 200 mm/min | % | GB/T 1040.1; GB/T 1040.2 |
>500 | >500 | >500 | >500 | >500 |
| Tensile strength | 200 mm/min | MPa | GB/T 1040.1; GB/T 1040.2 |
>17 | >17 | >17 | >17 | >17 |
| Change in strength after ageing | 200 mm/min; 168 h / 135°C |
% | GB/T 2951.12 | ±20 | ±20 | ±20 | ±20 | ±20 |
| Load elongation (hot set) | 200±3°C; 0.2 MPa; 15 min |
% | GB/T 2951.21 | ≤75 | ≤75 | ≤75 | ≤75 | ≤75 |
| Residual deformation (hot set) | 200±3°C; 0.2 MPa; 15 min |
% | GB/T 2951.21 | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 |
| Content moisture | Karl Fischer method | ppm | SH/T 1770 | ≤200 | ≤200 | ≤200 | ≤200 | ≤200 |
| Electrical properties | ||||||||
| Relative permittivity | 50 Hz; 23°C | — | GB/T 1409 | ≤2,35 | ≤2,35 | ≤2,35 | ≤2,35 | ≤2,35 |
| Dielectric loss tangent | 50 Hz; 23°C | — | GB/T 1409 | ≤5×10⁻⁴ | ≤5×10⁻⁴ | ≤5×10⁻⁴ | ≤5×10⁻⁴ | ≤5×10⁻⁴ |
| Volume resistivity | 1 kV/mm; 23°C | Ω·m | GB/T 1410 | ≥1,0×10¹⁴ | ≥1,0×10¹⁴ | ≥1,0×10¹⁴ | ≥1,0×10¹⁴ | ≥1,0×10¹⁴ |
Wanhua XLPE — semi-conducting compound (4205 series)
Semi-conducting XLPE for cable shielding layers at voltages from 69 kV to 550 kV (Um).
| Property | Test conditions | Unit | Standard | 4205C 69 kV (Um=72.5 kV) |
4205S 161 kV (Um=170 kV) |
4205SC 230 kV (Um=245 kV) |
4205EHV >230 kV (Um=550 kV) |
|---|---|---|---|---|---|---|---|
| Density | — | g/cm³ | ISO 1033.1 | ≤1,15 | ≤1,15 | ≤1,15 | ≤1,15 |
| Elongation at break | 200 mm/min | % | GB/T 1040 | >150 | >150 | >150 | >180 |
| Tensile strength | 200 mm/min | MPa | GB/T 1040 | >15 | >15 | >15 | >15 |
| Change in strength after ageing | 168 h / 135°C | % | GB/T 2951.12 | ±20 | ±20 | ±20 | ±20 |
| Load elongation (hot set) | 200 mm/min; 168 h / 135°C |
% | GB/T 2951.5 | <100 | <80 | <60 | <60 |
| Residual deformation (hot set) | 200°C; 0,2 MPa |
% | GB/T 2951.5 | <10 | <10 | <10 | <10 |
| Electrical properties | |||||||
| Semiconducting resistivity (at 20°C) | — | Ω·m | GB/T 3048.3 | <50 | <50 | <50 | <50 |
| Semiconducting resistivity at 90°C | — | Ω·m | GB/T 3048.3 | <1000 | <500 | <300 | <200 |