Technical Specifications
Typical physical property data, subject to batch test reports.
| Test Item | Test Method | Test Condition | Unit | Typical value |
|---|---|---|---|---|
| Density | ASTM D792 | at 20±3℃ | g/cm3 | 1.26±0.03 |
| Shore hardness-A | ASTM D2240 | at 20±3℃ | Shore A | 95±3 |
| Volume resistance | GB/T1410 | at 20±3℃ | Ω·cm | 2.77×10¹⁵ |
| Temperature resistance grade | - | - | ℃ | 125 |
| Environmental characteristics | Accord with RoHS and REACH |
| Test Item | Test Method | Test Condition | Unit | Requirements | Values |
|---|---|---|---|---|---|
| Tensile Strength | 2PfG 2962 | at 20±3℃ | N/mm2 | ≥8 | 14.2 |
| Elongation at Break | 2PfG 2962 | at 20±3℃ | % | ≥125 | 295 |
| After air oven accelerated aging | 150℃×168h | ||||
| Tensile Strength; Percent of unaged value | 2PfG 2962 | at 20±3℃ | % | ≥75 | 105 |
| Elongation at Break; Percent of unaged value | 2PfG 2962 | at 20±3℃ | % | ≥75 | 91 |
| Hot set test | 200±3℃,15min,20N/cm2 | ||||
| Hot | 2PfG 2962 | at 20±3℃ | % | ≤100 | 40 |
| Set | 2PfG 2962 | at 20±3℃ | % | ≤25 | 0 |
| Voltage test on completed cable | 2PfG 2962 | AC,6.5kV,5min,at 20℃ water | - | No breakdown | No breakdown |
| Insulation resistance at 20℃ | 2PfG 2962 | 15m,6h | MΩ•km | ≥709 | 12600 |
| Insulation resistance at 90℃ | 2PfG 2962 | 15m,6h | MΩ•km | ≥0.709 | 112 |
| Cold bending test | 2PfG 2962 | -40℃,16h | - | No Crack | No Crack |
| Test of absence of halogen | - | ||||
| PH | EN50267-2-2 | - | - | ≥4.3 | 6.1 |
| Conductivity | EN50267-2-2 | - | μS/mm | ≤10 | 0.9 |
| Chlorine- and Bromine content, expressed in HCl | EN50525-1 | - | % | ≤0.5 | 0 |
| Conductivity | EN60684-2 | - | % | ≤0.1 | 0 |
Extrusion Process
Drying and dehumidification: Dry the compounds at 70℃ for at least 2 hours by air blast and the dehumidifier before processing.
Extrusion machine parameters: It is recommended to use an extruder with a length-to-diameter ratio of 25:1 for extrusion. The screw compression ratio is 1.5- 1.8:1.
Extrusion cooling conditions): Every cooling system of extrusion molding machine must be able to work automatically ，feed opening must be cooled with water.
Conductors preheating: Preheating temperature is 65℃--85℃;
Extrusion temperature parameters: The actual temperature of melt and the value of the temperature control table may be different, so we should choose the right temperature.
| Position | Area 1 | Area 2 | Area 3 | Area 4 | Neck | Head |
|---|---|---|---|---|---|---|
| Temp. (℃) | 120±5 | 180±5 | 185±5 | 190±5 | 195±5 | 195±5 |
Recommended Processing Parameters
Material Composition:
- By the polyolefin materials, filler, stabilizer, lubricant inside and outside through special proportion, end spacing refining and added to the mix and twin-screw
- granulating of halogen-free insulating materials.
Irradiation process
- Irradiation dose: Recommendation irradiation dose is 10-20 Mrad;
- The irradiation dose should be adjusted according to the product structure and specification difference.
- Due to the influence of the difference of electron accelerators on the measurement, the selection of radiation dose should be based on the test thermal extension meeting the requirements. It is suggested that the dose should be used for reference only, and the thermal extension should be controlled in the range of 30-60%.
Inspection Requirements
- Appearance:Visual inspection and hand inspection, polymer particle diameter is 3～5mm.
- Properties:Annex I and Annex II
- Package:Packaging in moisture-proof bag, normally pack 25 kg or 500 kg per bag; l0 kg per sample.
- Transport and Storage:Hand with care during transport, avoid to be exposed to the sun and rain; stored in clean, shady, dry and ventilated warehouse.