This Semiconductive XLPE Shield Compound is a specially formulated cable manufacturing compound designed for the production of reliable Medium Voltage (MV) and High Voltage Power Cables up to 35kV. As an essential component, it forms the smooth inner semiconductor shield and insulation shield layers in XLPE insulated cables, ensuring uniform electrical field distribution and preventing harmful partial discharges.
The compound is a crosslinkable semicon based on a conductive polymer compound with optimized carbon black dispersion. It provides excellent compatibility with TR-XLPE insulation, creating a flawless interface that minimizes contamination and enhances the long-term performance of underground, industrial, and substation cables. Manufactured to meet stringent international standards such as IEC 60502-2, it is the ideal choice for producing durable and efficient power cable shields.
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Inner Semiconductive Shield Compound for MV Power Cable Up To 35kV
This material is used as a crosslinkable semiconductive wire and cable shielding material. It is made of:
High-quality EVA resin
Conductive black carbon (main material)
Crosslinking agent
Antioxidant and other additives
The mixed granulation and fabrication process ensures stable and reliable quality.
Shielding material for 35kV crosslinkable polyethylene (XLPE) insulated cable conductor
Maximum working temperature: 90°C
| Property | Unit | Test Method | Typical Value |
|---|---|---|---|
| Density @23°C | g/cm³ | ASTM D792 | 1.12 |
| Tensile strength | MPa | IEC 60811-1-1 | 17.0 |
| Elongation at break | % | IEC 60811-1-1 | 308 |
| Impact embrittlement @ –40°C | Failure number / piece | ASTM D746 | 0/30 |
| Property | Variation (%) |
|---|---|
| Tensile strength variation | +7 |
| Breaking elongation variation | –5 |
| Property | Value |
|---|---|
| Elongation under load | 50% |
| Permanent deformation | 0% |
| Temperature | Value (Ω·cm) | Test Method |
|---|---|---|
| @20°C | 25 | ASTM D257 |
| @90°C | 240 | ASTM D257 |
Recommended equipment: Polyethylene-specific extruder
Draw ratio (L/D): 18:1 to 25:1
Wire mesh filter: 60 to 80 type (recommended)
| Zone | 1 | 2 | 3 | 4 | 5 | Neck | Head | Die |
|---|---|---|---|---|---|---|---|---|
| Temp | 75 | 85 | 105 | 115 | 115 | 115 | 115 | 115 |
Keep at room temperature
Storage environment: clean, dry, well ventilated
Dry after long-term opening (moisture exposure)
| Parameter | Specification |
|---|---|
| Net weight per package | 600 kg |
| Inner packaging | Plastic sealed film bag |
| Outer packaging | Corrugated carton with palletized bottom |
| Advantage | Description |
|---|---|
| 35kV rated | Suitable for high-voltage XLPE cables |
| 90°C working temp | Thermal stability |
| Low volume resistivity | 25 Ω·cm @20°C – excellent conductivity |
| Stable aging performance | Minimal variation after 135°C / 168h |
| Consistent processing | Stable mixed granulation process |
