| Application | fibre |
Analysis Project | Quality Index | Test result | Test method | ||
Premium | Qualified | ||||
| Melt mass flow rate, g/10min | 16.0~22.0 | 16.0~22.0 | 21.0 | GB/T 3682.1-2018 | |
Isotactic index, % | ≥95.0 | ≥95.0 | 95.7 | GB/T 2412 | |
Ash content of granules, % (mass fraction) | ≤0.0300 | ≤0.0400 | 0.0297 | GB/T 9345.1-2008 | |
Tensile yield stress, MPa | ≥31.5 | ≥30.0 | 38.9 | GB/T 1040.2 | |
Appearance (large and small particles), g/kg | ≤10 | ≤15 | 5 | SH/T 1541.1 | |
Appearance (snake skin and tailing), pc/kg | ≤10 | ≤15 | 2 | SH/T 1541.1 | |
| Appearance (black spots and colored), pc/kg | ≤5 | ≤10 | 5 | SH/T 1541.1 | |
| Appearance (black particles), pc/kg | 0 | 0 | 0 | SH/T 1541.1 | |
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| Application | fibre |
Analysis Project | Quality Index | Test result | Test method | ||
Premium | Qualified | ||||
| Melt mass flow rate, g/10min | 16.0~22.0 | 16.0~22.0 | 21.0 | GB/T 3682.1-2018 | |
Isotactic index, % | ≥95.0 | ≥95.0 | 95.7 | GB/T 2412 | |
Ash content of granules, % (mass fraction) | ≤0.0300 | ≤0.0400 | 0.0297 | GB/T 9345.1-2008 | |
Tensile yield stress, MPa | ≥31.5 | ≥30.0 | 38.9 | GB/T 1040.2 | |
Appearance (large and small particles), g/kg | ≤10 | ≤15 | 5 | SH/T 1541.1 | |
Appearance (snake skin and tailing), pc/kg | ≤10 | ≤15 | 2 | SH/T 1541.1 | |
| Appearance (black spots and colored), pc/kg | ≤5 | ≤10 | 5 | SH/T 1541.1 | |
| Appearance (black particles), pc/kg | 0 | 0 | 0 | SH/T 1541.1 | |
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