TYPE
ITEM

SG1

SG2

SG3

SG4

SG5

SG6

SG7

SG8

Viscosity
(or K value)
average polymerization degree

156-144
(77-75)

143-136
(74-73)

135-127
(72-71)
1350-1250

126-119
(70-69)
1250-1150

118-107
(68-66)
1100-1000

106-96
(65-63)
950-850

95-87
(62-60)
850-750

86-73
(59-55)
750-650

Number of impurity particle

30

30

30

30

30

30

40

40

Volatiles content
G/ml≥

0.40

0.40

0.40

0.40

0.40

0.40

0.40

0.40

Appearing density

0.42

0.42

0.42

0.45

0.45

0.45

0.45

0.45

Residual
After sieve

Mesh
0.25mm≤

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

Mesh
0.063mm≤

90

90

90

90

90

90

90

90

Number of grain
Number/400cm2≤

40

40

40

40

40

40

50

50

Plasticizer absorbenecy value of 100g resin

25

25

25

22

17

15

-

-

Whiteness(160℃,after 10min),% ≥

75

75

75

75

75

75

70

70

Water extractant solution conductivity s/m≤

5x10-3

5x10-3

5x10-3

Residual chlore thylene content mg/kg≤

10

10

10

10

10

10

10

10

Ethylidene chloride
mg/kg≤

150

150

150

150

150

150

150

150

Packing: packed in net 25kg/bag  of plastic bag lined with pvc bag inner or kraft plastic paper bag with inner