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1

Before ageing test

1.1 Tensile strength(MPa)

≥ 6.5

1.2 Elongation at break(%)

≥ 200

2

Air oven ageing test

2.1 Test condition

135±2℃/168h

2.2Tensile strength rate(%)

≤ 30

2.3 Elongation at break rate (%)

≤ 30

3

Air bomb ageing test

3.1 Test condition

127±2℃/40h

3.2 Tensile strength rate(%)

≤ 30

3.3 Elongation at break rate (%)

≤ 30

4

Heat extension test

4.1 Test condition

200±3℃/15min, stress0.2N/mm²

4.2 Loading elongation rate(%)

≤ 100

4.3 Un-loading elongation rate(%)

≤ 25

5

Insulation resistance constant

5.1 K value at 20℃(MΩ–km)

≥ 2400

6

Water absorption determined by the capacitance method

6.1 Increase in capacitance

1 to 14 days (%)

≤ 10

7 to 14 days (%)

≤ 3

7

Maximum material operating temperature

90℃