This product takes linear low-density polyethylene as the main raw material, and adds catalytic masterbatch, additives, etc., through a single process of specific process, it is mainly used for the production of 10kV and below overhead insulated cables.
Performance indicators (typical values): enforce standards:JB/T 10260-2014
Serial number | Pilot project | unit | YJG | |
1 | Tensile strength ≥ | Mpa | 13.0 | |
2 | Fracture elongation green ≥ | % | 300 | |
3 | Impact embrittlement (-76℃)≤ | N/A | 15/ 30 | |
4 | 135℃, 168h air thermal aging | Variation rate of tensile strength≤ | % | ±20 |
Rate of change of elongation at break≤ | % | ±20 | ||
5 | Thermal elongation 200℃,0.2MPa, 15min | Thermal elongation≤ | % | 175 |
Permanent deformation rate after cooling≤ | % | 15 | ||
6 | 50Hz、20℃ | Relative dielectric constant≤ | / | |
Dielectric loss factor≤ | 0.001 | |||
7 | Volume resistivity (1 kV, 20℃)≥ | Ω·cm | 5.0×1013 | |
8 | Dielectric strength≥ | MV/ m | 25 | |
9 | Gel content≥ | % | / | |
Application process reference
Recommended extruder body temperature: 160℃~200℃; Neck temperature: 200℃; Head temperature: 210℃~215℃.
Crosslinking condition
Crosslinking condition | temperature | Insulation thickness (1mm) |
Warm water crosslinking | ≥90℃ | ≥4小时 |
Steam crosslinking | ≥90℃ | ≥6小时 |
Packaging and storage
1. 1. The product is packed with impervious aluminum foil/polyethylene composite film bag, which usually has a net weight of 25kg and is packed into a single unit, and is transported by single pallet palletizing. The net weight specifications of single pallet palletizing are 1000kg, 1250kg and 1500kg.
2. Should be stored in a clean, dry and ventilated environment, suitable for storage temperature 0℃ ~ 35℃.
3. The validity period is 6 months under the sealed condition, and it is recommended to use within 24 hours after opening. If the recommended time limit is exceeded, the quality is easily affected by pre-crosslinking.