NO. ITEM TEST METHOD UNIT RANGE

I/V Intrinsic viscosity GB17931-2003

0.83±0.015

dl/g

1

ASTM 0.81±0.015

2 MELTING POINT GB/T 14190-2008 °C 248±2

3 ACETALDEHYDE Acetaldehyde content GB17931-2003 ug/g ≤1.0

4 COOH CONTENT Carboxyl terminal GB/T 14190-2008 mol/t ≤35

5 COLOR Color value-B value GB/T 14190-2008 b-value ≤0

Color value-L value GB/T 14190-2008 L-value ≥82

6 DEG Diethylene glycol content GB/T 14190-2008 wt% 1.3±0.2

7 MOISTURE Water content GB/T 14190-2008 wt% ≤0.2

8 ASH Ash content GB/T 14190-2008 % ≤0.05

9 DUST Powder GB/T 14190-2008 mg/kg ≤50