Product description
Ultra-low temperature resistant and ultra-resistant mineral oil and fuel oil cross-linked polyolefin locomotive wire sheath material is made of high-purity resin as the base material, and halogen-free flame retardant, cross-linking agent, antioxidant, etc. are added to mix and extrude and granulate. In terms of performance, it combines excellent properties such as halogen-free, heat-resistant, flame-retardant, low smoke, and oil-resistant. It has no precipitation pollution, meets the relevant requirements of Rohs, etc., and is easy to extrude and process.
Application field
Suitable for locomotive cables of European standard EN50264.
Product parameters
| Testing items | VALUE | Typicalva lue | UNIT | Method |
| Physical properties | ||||
| Hardness | 94±3 | 93 | Shore Hardness A | GB/T 2411 |
| Density | ≤1.50 | 1.45 | g/cm3 | GB-T 1033 |
| Number of failures at low temperature embrittlement temperature | ≤15/30 | 0/30 | PCS | GB/T 5470 |
| Tensile strength before irradiation | ≥8 | 8.5 | MPa | GB/T 1040 |
| Elongation at break before irradiation | ≥200 | 220 | % | GB/T 1040 |
| Tensile strength before aging | ≥10 | 13.2 | MPa | GB/T 1040 |
| Elongation at break before aging | ≥150 | 160 | % | GB/T 1040 |
| Thermal elongation 0.2MPa×200℃×15min | ||||
| Elongation under load | ≤100 | 10 | % | GB/T 2951 |
| Permanent deformation | ≤25 | 0 | % | GB/T 2951 |
| Aging performance 135℃×168h | ||||
| Change rate of tensile strength | ≤±30 | 10 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤±30 | -13 | % | GB/T2951.12 |
| oil resistant 100℃×72h | ||||
| Change rate of tensile strength | ≤±30 | -10 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤±40 | -18 | % | GB/T2951.12 |
| oil resistant 70℃×168h | ||||
| Change rate of tensile strength | ≤±30 | -16 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤±40 | -25 | % | GB/T2951.12 |
| Acid and alkali resistant | ||||
| N-oxalic acid solution | ||||
| Change rate of tensile strength | ≤30 | -20 | % | GB/T2951.12 |
| Elongation at break | ≥100 | 130 | % | GB/T2951.12 |
| N-sodium hydroxide solution | ||||
| Change rate of tensile strength | ≤30 | -14 | % | GB/T2951.12 |
| Elongation at break | ≥100 | 140 | % | GB/T2951.12 |
| Volume Resistivity at 20℃ | ≥1.0×1013 | 2.2×1014 | Ω.cm | GB/T 1410 |
| Dielectric strength | ≥20 | 22 | MV/m | DIN EN 6024 |
| Oxygen index | ≥30 | 36 | % | GB/T 2406 |
| Amount of halogen acid gas | ≤0.5 | 0.1 | mg/g | IEC 60754 |
| PH | ≥4.3 | 5.6 | - | IEC 60754 |
| Conductivity | ≤10 | 7 | μs/mm | IEC 60754 |
The application of 125°C irradiation cross-linked halogen-free flame-retardant polyolefin cable materials in high-speed rail locomotive wire and cable sheath materials is to meet the strict requirements of high-speed rail locomotives for cable materials during operation.
Temperature resistance: It can withstand a long-term operating temperature of 125°C and is suitable for wiring of electrical equipment inside locomotives.
Halogen-free flame retardant: It does not contain halogen, and produces less toxic gas and corrosive smoke during combustion, which improves the safety of high-speed rail locomotives.
Irradiation cross-linking: Through the irradiation cross-linking process, the mechanical properties and chemical corrosion resistance of the material are enhanced, so that it can maintain stable performance even in harsh environments.
Environmental protection characteristics: It meets environmental protection requirements, produces less smoke and toxic gases during combustion, which is beneficial to environmental protection and passenger safety.
Chemical reagent resistance: It can resist the erosion of oils and other chemicals and is suitable for various environments that may be exposed to inside locomotives.
Weather resistance: It has good weather resistance and can adapt to outdoor environments and temperature changes.
Flexibility: The cable material is flexible, which is convenient for installation and wiring, especially when the space inside the vehicle is limited.
Compliance with standards: It usually complies with international and European standards, such as the EN50264 series of standards, and the Chinese national standard GB12528.11-2003.
