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

16

20

20

Volatile content (incl. water) %     ≤

0.30

0.40

0.40

0.40

Apparent density                 ≥

0.42

0.48

0.48

0.50

Particle size

≥ 0.25mm     ≤

2.0

2.0

2.0

0.4

≥ 0.063mm   ≥

95

95

95

95

Number of Fish Eye (/400 cm2)   ≤

20

20

30

30

Plasticizer absorption of 100g resin ≥

26

19

12

22

Whiteness (160°C, after 10 min.) % ≥

78

78

75

75

VCM Residue PPM              ≤

5

5

5

5