B2 flame retardant cable sheath material is made of high-purity resin as the base material, with halogen-free flame retardant, antioxidant, etc. mixed and extruded into granules.
Product features: It has excellent performance such as halogen-free, heat-resistant, and weather-resistant, has no precipitation pollution, meets the relevant requirements of Rohs, and is easy to extrude and process.
Product application: It is suitable for the production of cable sheath layers with GB/T 31247 standard.
| Testing Items | Value | Typical Value | Unit | Method |
| Density | ≤1.65 | 1.62 | g/cm3 | GB/T1033 |
| Low-temperature brittle temperature (-40°C) failure number | ≤15/30 | 0/30 | Pcs | GB/T5470 |
| Environmental stress cracking resistance | ≥96 | 108 | F0/H | GB/T2951 |
| Thermal stress cracking resistance | Uncracked | Uncracked | 一 | GB/T32129 |
| Tensile strength before aging | ≥10 | 11.8 | MPa | GB/T2951 |
| Elongation at break before aging | ≥150 | 180 | % | GB/T2951 |
| Performance After Aging 110℃×168H | ||||
| Change rate of tensile strength | ≤±30 | 10 | % | GB/T2951 |
| Change rate of elongation at break | ≤±30 | -9 | % | GB/T2951 |
| Volume resistivity at 20℃ | ≥1.0×10^12 | 5.6×10^12 | Q.m | GB/T1410 |
| Dielectric strength | ≥18 | 20 | MV/m | DIN EN 6024 |
| Oxygen index | ≥35 | 37 | % | GB/T2406 |
| Smoke density | ≤100 | 80 | / | GB/T8323 |
| Flame method | ≤350 | 200 | / | GB/T8323 |
| Flameless method | ≤5 | 0 | m/g | GB/T17650 |
| Hydrogen halide gas content | ≥4.3 | 5.9 | / | GB/T17650 |
| Combustion gas pH value | ≤10 | 6 | μs/mm | GB/T17650 |
| Combustion gas conductivity | ≤180 | 100 | kW/m^2 | ISO/5660 |
| Peak heat release rate | ≤180 | 110 | MJ/m^2 | ISO/5660 |
| Total heat release | ≤100 | 80 | kW/m^2 | ISO/5660 |
1. When the storage environment is humid or the surface quality requirements are high, the pellets can be placed in a hot air hopper at 80°C for 1 to 2 hours for drying.
2. The screw should be cleaned before extrusion to ensure the cleanliness of the product. It is recommended to use an 80-mesh or 100-mesh filter to avoid impurities from being mixed in during the extrusion process, while ensuring the melt pressure to obtain a good appearance and material density.
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