Product description：
This product is made of high-purity resin as the base material, and is mixed with halogen-free flame retardants, cross-linking agents, antioxidants, etc. for extrusion and granulation. It has excellent performance 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 national standard GB/T12528.
Product parameters:
| Testing items | VALUE | Typicalva lue | UNIT | Method |
| Physical properties | ||||
| Hardness | 90±3 | 89 | 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 | 8.9 | MPa | GB/T 1040 |
| Elongation at break before irradiation | ≥200 | 230 | % | GB/T 1040 |
| Tensile strength before aging | ≥10 | 13.5 | MPa | GB/T 1040 |
| Elongation at break before aging | ≥150 | 180 | % | GB/T 1040 |
| Thermal elongation 0.2MPa×200℃×15min | ||||
| Elongation under load | ≤100 | 5月10日 | % | GB/T 2951 |
| Permanent deformation | ≤25 | 0 | % | GB/T 2951 |
| Aging performance 158℃×168h | ||||
| Change rate of tensile strength | ≤±30 | 16 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤±30 | -19 | % | GB/T2951.12 |
| Oil resistant 100℃×72h | ||||
| Change rate of tensile strength | ≤-50 | -38 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤-50 | -34 | % | GB/T2951.12 |
| Oil resistant 70℃×168h | ||||
| Change rate of tensile strength | ≤-55 | -37 | % | GB/T2951.12 |
| Change rate of elongation at break | ≤-55 | -36 | % | GB/T2951.12 |
| Acid and alkali resistant | ||||
| N-oxalic acid solution | ||||
| Change rate of tensile strength | ≤30 | -25 | % | GB/T2951.12 |
| Elongation at break | ≥100 | 130 | % | GB/T2951.12 |
| N-sodium hydroxide solution | ||||
| Change rate of tensile strength | ≤30 | -16 | % | GB/T2951.12 |
| Elongation at break | ≥100 | 140 | % | GB/T2951.12 |
| Volume Resistivity at 20℃ | ≥1.0×1013 | 5.2×1013 | Ω.cm | GB/T 1410 |
| Dielectric strength | ≥20 | 24 | MV/m | DIN EN 6024 |
| Oxygen index | ≥30 | 32 | % | GB/T 2406 |
| Amount of halogen acid gas | ≤0.5 | 0.1 | mg/g | IEC 60754 |
| PH | ≥4.3 | 5.9 | - | IEC 60754 |
| Conductivity | ≤10 | 5 | μs/mm | IEC 60754 |
The application of China standard cross-linked polyolefin high-speed rail locomotive cable sheath material in high-speed rail locomotive cables is to meet the high requirements for cable materials, including high temperature resistance, oil resistance, chemical corrosion resistance, good mechanical properties and electrical insulation properties.
Locomotive internal cable: used for wiring of electrical equipment inside high-speed rail locomotives, including control cables, communication cables and power cables, which need to maintain stable performance under high temperature, oil pollution and harsh environment.
Temperature resistance: suitable for wiring of electrical equipment inside railway locomotives with AC rated voltage of 3kv and below, with a temperature resistance of 125℃, ensuring the safety and reliability of cables in high temperature environments inside locomotives.
Halogen-free flame retardant: meets the requirements of halogen-free flame retardant, reduces the risk of fire, and produces less toxic gases and corrosive smoke during combustion, which improves the safety of high-speed rail locomotives.
Chemical corrosion resistance: can resist the erosion of oils and other chemicals, and is suitable for various chemical environments that may be exposed to inside locomotives.
Weather resistance: It has good weather resistance, can adapt to outdoor environment and temperature changes, and is suitable for use in various climatic conditions.
Softness: The cable material is soft, which is easy to install and wire, especially when the space inside the vehicle is limited.
Environmental protection characteristics: It meets environmental protection requirements, does not contain halogen, and is an environmentally friendly material.
Compliance with standards: It usually complies with China's national standards GB12528.11-2003, etc. These standards specify the requirements of cable temperature resistance, oil resistance, chemical corrosion resistance and mechanical properties.
The development and application of this cable sheath material ensures the high reliability and long life of high-speed rail locomotive cables in various complex environments, while also meeting the strict requirements for environmental protection and safety.
