Item

Unit

Test method

Desired Value

1.film structure

FEVE/PET/EVA

PET thickness

μm

GB/T13541-92

250

PVDF thickness

μm

GB/T13541-92

30

Film thickness

μm

GB/T13541-92

340

2.peel strength

N/cm

ASTM D-1876 180 ' Peel

≥ 6.5

EVA/ backsheet normal

N/cm

ASTM D-1876 180 ' Peel

≥ 40

EVA/ backhsheet after double 85 treatment

N/cm

ASTM D-1876 180 ' Peel

≥ 40

EVA/backsheet after UV treadment

N/cm

ASTM D-1876 180 ' Peel

≥ 40

3,thermal shrinking rate MD/TD

%

ASTM D-1204 , 150 'C /30min

≤ 1

4,thermal weight—lost rate

%

GB/T13541-92

≤ 0.25

5,water vapor transmittances

gm/m2.day

ASTM F-1249 , 38 C /100%RH

≤ 3.0

6,breakdown voltage

KV

ASTM D-149

≥ 18

7,partial discharge

VDC

IEC60664-1

≥ 1100

8,yellowness index( UV 1000h )

-

ASTM E313-05

b ≤ 2

9,tensile strength

MPa

ASTM D-882

≥ 40

10.(QUVB,4000H)

/

GB/T 16422.3-1997

4 LEVEL

11.service life

years

more than 25