B1 low smoke halogen-free flame retardant polyolefin cable sheath material is made of high purity polyolefin resin as the base material, adding high-quality and efficient flame retardants, antioxidants and other processing aids, and is made by mixing, plasticizing and granulating.
Product features: It has excellent mechanical and physical properties, electrical properties, flame retardant properties, and has high heat resistance, etc. No precipitation pollution, meets the relevant requirements of Rohs, etc., and is easy to extrude and process.
Product application: It is suitable for the production of outer sheath or insulation layer of power cables, communication cables, etc.
| Testing Items | Value | Typical Value | Unit | Method |
| Density（20℃） | ≤1.6 | 1.55 | g/cm3 | GB/T1033 |
| Resistant to environmental stress cracking | 108 | 108 | 108 | F0/h |
| Resistant to thermal stress cracking | Not cracked | Not cracked | Not cracked | - |
| Tensile strength before aging | ≥10 | 12.5 | MPa | GB/T 1040 |
| Elongation at break before aging | ≥150 | 165 | % | GB/T 1040 |
| Heat Deterioration 110±2℃，168h | ||||
| Rate of change in the tensile strength | ≤±30 | 22 | % | GB/T 2951.12 |
| Rate of change of fracture elongation | ≤±30 | -20 | % | GB/T 2951.12 |
| Impact brittlement temperature（-25 ºC) | ≤15/30 | 0/30 | PCS | GB/T 5470 |
| Volume resistivity(20ºC) | ≥1.0×10^10 | 4.5×10^10 | Ω·m | GB/T 1410 |
| Dielectric strength(20ºC) | ≥18 | 25 | MV/m | GB/T 1408.1 |
| Oxygen index | ≥35 | 37 | % | GB/T 2406 |
| Amount of halogen acid gas | ≤0.5 | 0 | mg/g | IEC 60754 |
| PH value | ≥4.3 | 6.1 | - | IEC 60754 |
| Conductivity | ≤2.5 | 2.3 | μs/mm | IEC 60754 |
| Smoke density with flame | ≤200 | 22 | - | GB/T 8323 |
| Flameless | ≤100 | 72 | - | GB/T 8323 |
| Peak heat release rate | ≤180 | 100 | kW/m^2 | ISO/5660 |
| Total heat release | ≤180 | 110 | MJ/m^2 | ISO/5660 |
| Average heat release rate | ≤100 | 80 | kW/m^2 | ISO/5660 |
Notes:
1. Make sure the extruder screw, barrel and die are clean.
2. After the extruder temperature reaches the set value before starting, it needs to be kept constant for about 0.5 hours. When starting the machine to discharge, the melt temperature should be controlled at about 150-160℃.
3. The recommended filter is a 60mesh + 80mesh + 60mesh combination filter
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