Item

Unit

Index

Test  method

Thickness

µm

100

175

GB12802.2-2004

Deviation of thickness

%

±3

±4

GB12802.2-2004

MD

MPa

≥150

≥140

GB12802.2-2004

Tensile strength

TD

MD

%

≥80

≥80

GB12802.2-2004

Elongation at break

TD

150,30min

MD

%

≤1.4

≤1.4

GB12802.2-2004

Heat shrinkage

TD

≤0.3

≤0.3

(45^o)  Gloss

%

25~45

25~45

GB8807

 Light transmittance

%

≤56

≤54

GB2410-80

Haze

%

≥48

≥50

GB2410-80

Electrical strength

V/µm

≥90

≥69

GB12802.2-2004

Volume resistivity

Ω.m

≥1×10¹⁴

GB12802.2-2004

 Relative dielectric constant

2.9~3.4

GB12802.2-2004

Dielectric loss tangent

≤3×10^-3

GB12802.2-2004