杏彩平台

Insulation compound GP4

NO.

Test Items

Values

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 condition135±2℃/168h
2.2Tensile strength rate(%)

≤ 30

2.3 Elongation at break rate (%)≤ 30
3Air bomb ageing test3.1 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
5Insulation resistance constant5.1 K value at 20℃(MΩ–km)≥ 2400
6Water absorption determined by the capacitance method6.1 Increase in capacitance1 to 14 days (%)≤ 10
7 to 14 days (%)≤ 3
7

Maximum material operating temperature

90℃

Polymer:  EPDMStandard No.：BS 7655-1.2