project

unit

First grade

Qualified product

Exterior

White

pale yellow

The same batch of products is allowed to have a slight color difference, and no obvious mixed color packaging is allowed

Intrinsic viscosity

dl/g

0.58 to 0.62

0.52 to 0.60

melting point

°C

252 to 258

250 to 256

Ash

Wt%

0.5 to 0.8

≥ 0.8

Particle distribution ratio 2 ~ 6mm

%

80 to 90