国产又猛又粗又大又爽又黄的视频-国产又色-国产又色又刺激视频-国产又色又粗又黄又爽黑人-国产又色又爽又刺激在线播放-国产又色又爽又刺激在线观看

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℃