item

index

appearance

white or light yellow free flow powder

moisture, %

≦10

weight of screen residue, %

≦10

purity, %

≥75

degree of hydrolysis, %

27-35

potassium content, %

≥11

chlorine ion content, %

≦7

intrinsic viscosity, 100ml/g

≥6

core wire linear expansion reduction rate, %

≥40