Type: | EP400 |
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Material: | Rubber |
Inside Material: | Fabric |
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Technical indexes Executive standard:HG/T 3782-20 | |||||||
project | tensile strength/Mpa | Elongation at break% | Wear volume/mm³ | hardness/Ao | Ozone aging | ||
Cover gum | physical property | Before aging | ≥14.0 | ≥400 | ≥250 | 55-70 | No crack |
After aging | ≥12.0 | ≥340 | -- | 60-75 | -- | ||
Acid and alkali resistance | category | Soaking solution | concentration | Soaking condition | Performance change rate before and after soaking | ||
Volume Expansion Rate | Tensile Strength Change Rate | ||||||
A1 | hydrochloric acid | 18% | 50ºC×96h | +10%Following | -10%within | ||
A2 | sulphuric acid | 50% | 50ºC×96h | +10%Following | -10%within | ||
A3 | sodium hydroxide | 48% | 50ºC×96h | +10%Following | -10%within | ||
Test conditions:Ozone concentration(50±5)*10(volume fraction),temperature(40±2)ºC,elongation(20±2)%,time15h |