S/N

Testing item

Unit

Standard

J-70 J-90

Typical value

J-70 J-90

1

Tensile strength

MPa

≥15.0

≥16.0

21

21

2

Elongation

%

≥150

≥150

300

300

3

Brittleness temperature    Testing temperature    Brittle capability

°CFail number

-15≤15/30

-15≤15/30

pass

pass

4

Thermal deformation

%

≤40

≤30

30

23

5

Thermal stable time at 200°C

min

≥60

≥180

70

200

6

Dielectric strength

MV/m

≥20

≥20

27

28

7

DC volume resistivity at 20°C 

Ω·m

≥1.0×108

≥1.0×1012

≥5.0×1012

≥5.0×1012

8

Volume resistance rate at operation temperature 

Ω·m

70°C≥1.0×109

95°C≥1.0×108

≥5.0×1010

≥1.0×1010

9

Aging in air     Circumstance: temperature                   time     Change of tensile properties≤     Change of elongation≤

°Ch%%

100±2168±20±20

135±2168±20±20

-5 -6

-5 -5

10

Quality loss after ageing

°Cg/m2

100±2168h≤20

115±2240≤20

18

18

Note:1  Relative density index shall be negotiated by the buyer and the seller2  The flame-retardant of oxygen usage shall be negotiated by the buyer and the seller