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Silane XLPE Compound of Sioplas Method for Aerial Wire and Cable up to 10kV
This warm water crosslinkable polyethylene insulation compound is a two component silane crosslinking system specifically developed for manufacturing high performance XLPE (cross linked polyethylene) insulated cables. The material is ideal for overhead power cables rated at 10kV and below, offering excellent extrusion characteristics, thermal stability, and electrical insulation properties.
| Component | Composition | Function |
|---|---|---|
| Compound A | High quality polyethylene resin + imported silane coupling agent | Base polymer matrix for crosslinking |
| Compound B | Organotin catalysts + antioxidant agents | Initiates and accelerates crosslinking reaction |
Loss in weight feeder system ensures precise control of component ratio, achieving consistent crosslinking density and uniform material properties.
Warm water curing (70°C to 90°C for 4 to 8 hours) eliminates the need for high pressure steam vulcanization lines, significantly reducing energy consumption, equipment costs, and manufacturing complexity.
| Feature | Benefit |
|---|---|
| Two component silane crosslinking | Controlled, reliable crosslinking; compatible with one step or two step processes |
| Excellent extrusion performance | Smooth, consistent output on standard single screw extruders; no specialized screw required |
| Stable physical & chemical indices | Batch to batch consistency; meets international standards for XLPE insulation |
| Loss in weight feeder compatibility | Maintains precise mixing ratio (95:5 or 92:8); prevents under/over crosslinking |
| Warm water curing | Simple, energy efficient; eliminates high pressure steam lines; reduces capital investment |
| Good thermal aging resistance | Suitable for continuous 90°C operation; maintains properties after aging (135°C / 168h) |
| Environmental & safety benefits | No hazardous byproducts; lower energy consumption; no high pressure steam fire risk |
| Property | Value |
|---|---|
| Gel content | ≥ 65% (per IEC 60502) |
| Tensile strength (before aging) | ≥ 13.5 MPa |
| Elongation at break (before aging) | ≥ 350% |
| Volume resistivity | ≥ 1 × 10¹⁵ Ω·cm |
| Dielectric strength | ≥ 25 kV/mm |
| Maximum continuous working temperature | 90°C |
| Maximum short circuit temperature | 250°C (up to 5 seconds) |
Specifically designed for:
10kV and below aerial cable insulation (overhead insulated cables)
ABC (Aerial Bundled Cables) for overhead distribution
Single core and multi core aerial cables
Overhead service drop cables
Rural electrification cables
Urban power distribution cables
| Condition | Requirement |
|---|---|
| Storage temperature | Room temperature (15°C – 30°C) |
| Environment | Clean, dry, well ventilated |
| Best before date | 6 months from production date |
| After mixing A + B | Use within 8 hours |
| After opening Compound A | Use within 24 hours (reseal tightly) |
| Component | Weight per bag | Packaging |
|---|---|---|
| Compound A | 23.75 kg | Moisture resistant aluminum laminated bag + composite paper bag |
| Compound B | 1.25 kg | Moisture resistant aluminum laminated bag + composite paper bag |
| Total | 25 kg per combined unit | Palletized bottom |
Bulk packaging options: 500 kg or 1000 kg FIBC bags available upon request.
| Parameter | Recommended Value |
|---|---|
| Extruder temperature profile | 150°C – 190°C (gradual increase) |
| Die temperature | 180°C – 200°C |
| Screw speed | 30 – 80 rpm |
| Cooling method | Water trough (ambient temperature) |
| Curing method | Warm water bath: 70°C – 90°C for 4 – 8 hours |
| Crosslinking verification | Measure gel content per IEC 60502 |
Note: Actual parameters may vary depending on extruder type, screw design, and cable construction.
| Property | Test Method | Typical Value |
|---|---|---|
| Density (Compound A) | ASTM D1505 | 0.920 – 0.925 g/cm³ |
| Melt flow index (190°C/2.16kg) | ASTM D1238 | 1.5 – 3.5 g/10 min |
| Tensile strength (before aging) | IEC 60811 | ≥ 13.5 MPa |
| Elongation at break (before aging) | IEC 60811 | ≥ 350% |
| Tensile strength retention (after aging) | IEC 60811 | ≥ 80% |
| Elongation retention (after aging) | IEC 60811 | ≥ 80% |
| Gel content | IEC 60502 | ≥ 65% |
| Volume resistivity | IEC 60093 | ≥ 1 × 10¹⁵ Ω·cm |
| Dielectric strength | IEC 60243 | ≥ 25 kV/mm |
| Benefit | Description |
|---|---|
| Energy saving | Warm water curing eliminates steam vulcanization lines |
| High crosslinking degree | ≥65% gel content (IEC 60502) |
| Good heat deformation resistance | Suitable for continuous 90°C operation |
| Smooth cable surface | Reduces electrical stress points and partial discharge risk |
| Standard extruder compatible | L/D 20:1 to 25:1; no expensive modifications |
| Low scrap rate | Consistent extrusion reduces waste |
| Long shelf life | 6 months when properly stored (unmixed) |
| Environmentally friendly | No hazardous byproducts; lower carbon footprint |
