0535 Cross-linkable Semi-conductive Inner Shielding Compound is a premium bonded-type semi-conductive shielding material designed for medium-voltage (MV) cross-linked polyethylene (XLPE) insulated power cables rated up to 35 kV. Produced for high-temperature vulcanization (HTV) processing, this advanced compound serves as both the conductor shield and bonded insulation shield, delivering uniform electric field distribution, excellent interface bonding, and long-term cable reliability in demanding power distribution applications.
Key Features and Advantages
- Superior Surface Quality & Processability: Offers excellent extruding fluidity and fine surface smoothness with minimal pre-cure or scorch risk during high-speed production.
- Stable Electrical Performance: Provides low and consistent volume resistivity at both 20°C and 90°C for reliable stress control.
- Strong Bonding & Conductor Compatibility: Forms excellent adhesion with XLPE insulation while maintaining strong compatibility with both copper and aluminum conductors.
- Anti-Oxidation Protection: Special additives prevent copper conductor oxidation, ensuring clean interfaces and extended service life.
- Mechanical & Thermal Stability: High tensile strength, excellent elongation retention after heat aging, and outstanding hot set performance.
- Low Moisture & Brittleness: Low moisture content and a brittleness temperature of -40°C support reliable performance in extreme environments.
Technical Specifications
| Parameter | Typical Value | Test Condition / Standard |
|---|
| Volume Resistivity (20°C) | ≤100 Ω·cm | IEC 60502 |
| Volume Resistivity (90°C) | ≤5000 Ω·cm | IEC 60502 |
| Tensile Strength | ≥12 MPa | After aging |
| Elongation at Break | ≥200% | After aging |
| Hot Set (200°C, 20 min) | ≤100% | IEC 60811 |
| Brittleness Temperature | -40°C | ISO 812 |
| Moisture Content | ≤0.1% | Pre-drying requirement |
| Recommended Extrusion Temp | Zone 1: 85–90°C → Flange: 110°C | See processing guide |
Recommended Processing Conditions
Optimized for high-temperature vulcanization extrusion:
- Temperature Profile (°C): Zone 1: 85–90 | Zone 2: 95–100 | Zone 3: 105–110 | Zone 4: 110–115 | Flange: 110–112 | Tube: 110–115 | Screw: 65–70
- Use double-layer filter mesh (40 mesh / 350 μm) for best surface finish.
- Pre-dry material in hopper at 40–60°C for 4 hours to control moisture.
Packaging and Storage
Supplied in 600 kg cardboard boxes with inner PE bags for easy handling and protection. Store in a cool, dry environment between 10–30°C. Unopened original packaging offers a recommended shelf life of up to 12 months.
0535 Cross-linkable Semi-conductive Inner Shielding Compound is the preferred choice for cable manufacturers seeking consistent quality, superior bonding, and reliable electrical performance in medium-voltage XLPE power cables.
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