No.

Item

Unit

Normal value

1

Nominal thickness and tolerance

mm

0.15

0.18

0.2

0.23

0.25

0.3

0.35

0.4

0.45

2

thickness tolerance

mm

±0.020

±0.025

±0.030

±0.030

±0.030

±0.030

±0.035

±0.040

±0.045

3

Density

g/m²

140±20

190±28

200±30

220±33

260±39

270±40

300±45

325±48

350±52

380±57

425±63

460±69

500±75

560±84

4

Polyester film Nominal thicknesses

µm

50

75

75

100

125

125

150

150

190

190

250

250

300

350

5

Tensilestrengt

MD

No bending

N/10mm

≥80

≥120

≥130

≥150

≥180

≥190

≥180

≥240

≥270

≥280

≥320

≥330

≥350

≥370

After bending

≥80

≥105

≥110

≥130

≥150

≥170

≥180

≥200

≥220

≥250

≥300

≥310

≥320

≥350

TD

No bending

≥80

≥105

≥110

≥130

≥150

≥170

≥190

≥200

≥220

≥250

≥300

≥310

≥320

≥350

After bending

≥70

≥90

≥100

≥110

≥120

≥150

≥170

≥150

≥180

≥220

≥250

≥280

≥300

≥250

6

Elongation

MD

No bending

%

≥15

≥5

≥5

After bending

≥10

≥5

≥3

TD

No bending

≥20

≥5

≥5

After bending

≥10

≥5

≥2

7

Breakdown voltage

kV

≥6

≥7

≥8

≥9

≥10

≥12

≥13

≥14

≥15

≥16

≥18

≥19

≥21

≥22

8

delamination

-

No delamination, no bubbles or other defects

9

Affected by heat (180℃±2℃, 10min or negotiated by both parties)

-

No layering, no foaming, no glue flow

10

Stiffness

N

To be determined

11

Long-term heat resistance (temperature index. T1)

-

≥155