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        Insulation compound EI7

        NO.

        Test Items

        Values

        1

        Before ageing test

        1.1 Tensile strength(MPa)

        ≥5.0

        1.2 Elongation at break(%)

        ≥200

        2

        Air oven ageing test

        2.1 Test condition

        135±2℃/168h

        2.2 Tensile strength(MPa)

        ≥5.0

        2.3 Tensile strength rate(%)

        ±30

        2.4 Elongation at break rate (%)

        ±40

        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

        250±3℃/15min, stress20N/cm2

        4.2 Loading elongation rate(%)

        < 100

        4.3 Un-loading elongation rate(%)

        < 25

        5

        Ozone ageing test

        5.1 Test condition

        25±2℃/24h, concentration 2.5-3%

        5.2 Test result

        No cracks

        5.3 Test condition

        40±2℃/72h, concentration 200±50ppm

        5.4 Test result

        No cracks

        6

        Low-temperature bend test

        6.1 Test condition

        -35±2℃

        6.2 Low-temperature elongation at unbreak(%)

        > 30

        6.3 Wire surface after low-temperature bend

        No cracks

        7

        Maximum material operating temperature

        90℃

        Polymer:  EPDM

        Standard No.:EN 50363-1:2005


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