No

Property

Unit

Normal Value

1

Flexural strength perpendicular to layer

At room temperature

MPa

≥230

150±2

2

Impact strength parallel to layer (Charpy method)

kJ/m2

≥30

3

Electric strength,perpendicular to the layerat 90±2 oil.

MV/m

Refer to table 3

4

Breakdown voltage, perpendicular to layer direction.

kV

≥28

5

Dielectric constant

Under 48Hz62Hz

≤5.5

under1Hz

6

Dissipation factor

Under 48Hz62 Hz

≤0.04

Under 1MHz.

7

Insulation resistance after immersing in water.

W

≥5.0×108

8

Density

g/cm3

≥1.8

9

Water absorption

%

Refer to table 4

Mean thickness

mm

Normal Value 

 Unit: MV/m

1.0

≥14.2

1.2

≥13.7

1.4

≥13.2

1.6

≥12.7

1.8

≥12.2

2.0

≥11.8

2.2

≥11.4

2.4

≥11.1

2.5

≥10.9

2.6

≥10.8

2.8

≥10.5

Above 3.0

≥10.2

Mean thickness

Mm

Normal Value                             Unitmg

Mean thickness

Mm

Normal Value                             Unitmg

0.4

5

≤25

0.5

6

≤27

0.6

8

≤31

0.8

10

≤34

1.0

12

≤38

1.2

14

≤41

1.6

≤19

16

≤46

2.0

≤20

20

≤52

2.5

≤21

25

≤61

3

≤22

Processed by one side to 22.5

≤73

4

≤23