Item | Specification | Result |
Intrinsic viscosity (dL/g) | 0.810±0.015 | 0.814 |
Chroma Color b value | ≤1.0 | -1.2 |
Chroma Color L value | ≥80 | 84 |
Diethylene glycol content DEG(%) | 1.3±0.2 | 1.3 |
Carboxyl terminal content -COOH(mmol/kg) | ≤30 | 18 |
Melting peak temperature (DSC method) Melting Point (ºC) | 249±2 | 249 |
Powder(mg/kg) | ≤80 | 14 |
Heterochromatic particles (grain/500g) | No | No |
Moisture(%) ≤0.2 0.02 | ≤0.2 | 0.02 |
Density(g/cm3) | 1.40±0.01 | 1.40 |
Ash(%) | ≤0.08 | 0.01 |