| Application | tubing |
Item | Superior product | First grade | Qualified product | Test result | |
Average degree of polymerization | 1135-981 | 1060 | |||
The number of impurity particles | ≤ | 16 | 30 | 60 | 4 |
Volatile (including water) content (%) | ≤ | 0.3 | 0.3 | 0.5 | 0.131 |
Apparent density(g/mL) | ≥ | 0.48 | 0.48 | 0.45 | 0.535 |
Sieve residue% | 250 μm mesh ≤ | 1.6 | 2 | 8 | 0.04 |
63 μm mesh ≥ | 97 | 90 | 85 | 99.16 | |
Number of fish eyes (6min152℃) / 400cm^2 | ≤ | 20 | 30 | 60 | 15 |
100g resin plasticizer absorption (g) | ≥ | 21 | 19 | - | 25 |
Whiteness (160℃, 10min)/% | ≥ | 80 | 78 | 70 | 84 |
Residual vinyl chloride content (ug/g) | ≤ | 3 | 5 | 10 | 0.1 |
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| Application | tubing |
Item | Superior product | First grade | Qualified product | Test result | |
Average degree of polymerization | 1135-981 | 1060 | |||
The number of impurity particles | ≤ | 16 | 30 | 60 | 4 |
Volatile (including water) content (%) | ≤ | 0.3 | 0.3 | 0.5 | 0.131 |
Apparent density(g/mL) | ≥ | 0.48 | 0.48 | 0.45 | 0.535 |
Sieve residue% | 250 μm mesh ≤ | 1.6 | 2 | 8 | 0.04 |
63 μm mesh ≥ | 97 | 90 | 85 | 99.16 | |
Number of fish eyes (6min152℃) / 400cm^2 | ≤ | 20 | 30 | 60 | 15 |
100g resin plasticizer absorption (g) | ≥ | 21 | 19 | - | 25 |
Whiteness (160℃, 10min)/% | ≥ | 80 | 78 | 70 | 84 |
Residual vinyl chloride content (ug/g) | ≤ | 3 | 5 | 10 | 0.1 |
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