Test Item | Superior | Test Value | Test Method |
K value | 65-68 | ||
Appearance | White powder | White powder | |
Average degree of polymerization | 970-1070 | 1000 | GB/T 5761-2023 |
Impurity particles number | 16 | 10 | GB/T 9348 |
Volatiles% | 0.3 | 0.11 | GB/T 2914 |
Apparent density g/ml | 0.5-0.5 8 | 0.53 | GB/T 20022 |
Sieve Residue 250μm% | 1.6 | 0.0 | GB/T 21843 |
Number of fish eye/400c m2 | 12 | 6 | GB/T 4611 |
Resin plasticizer absorption g/100g | 20 | 25.6 | GB/T 3400 |
Whiteness(160ºC/10m in)% | 78 | 86.4 | GB/T 15595 |
Residual polythene monomer content , μ g/g | 3 | 0.1 | GB/T 29874 |