NO.

Test Conditions

Temperature 22.0℃

Relative humidity

40.0%r.h

1

Metric name:

Unit：

Index：

Actual data：

Test method：

2

Thickness

mm

0.05±0.05

0.053

GB/T451.3

3

Fix quantify

g/㎡

65±10%

68

GB/T451.2

4

Ash content≤

%

0.7

0.68

GB/T742

5

Moisture≤

%

6

5.9

GB/T462

6

PH of water extract

6.5～8

7

GB/T1545.2

7

Tensile strength≥

Horizontal

KN/M

1.6

1.58

GB/T453

portrait

3.5

3.8

8

Elongation at break wrinkle

%

50±10%

45

GB/T453

9

Dry paper loss（tg＆）（100℃）not less than

%

0.16

GB/T3334

10

Power frequency breakdown voltage after stretching and leveling a layer of invading transformer oil≥

KV

2.2

2.2

GB/T3333

11

Power frequency breakdown voltage in air≥

V

800

900

GB/T3333