Parameter
Grade
Standard: GB5761-1993
SG3
SG5
SG7
SG8
K - Value
72 - 71
66 - 68
62 - 60
59 - 55
Polymerizing Index
1300 +/-50
1000 +/-50
800 +/-50
700 +/-50
Number of impurity particles ≤
16
20
Volatile content (incl. water) % ≤
0.30
0.40
Apparent density ≥
0.42
0.48
0.50
Particle size
≥ 0.25mm ≤
2.0
0.4
≥ 0.063mm ≥
95
Number of Fish Eye (/400 cm2) ≤
30
Plasticizer absorption of 100g resin ≥
26
19
12
22
Whiteness (160°C, after 10 min.) % ≥
78
75
VCM Residue PPM ≤
5