This belt is suitable for the working conditions contacting with acid-alkali, such as manufacturing phosphate fertilizer, making sea salt. We use a rubber-plastic mixture as belt cover and added with inert materials of nice acid-alkali resistance. Belt carcasses are made of EP canvas which has more reliable acid-alkali resistance than cotton canvas. We often produce endless belt of this type.
Rubber Cover Properties:
|
Item |
Tensile strength/Mpa≥ |
Breaking elongation/%≥ |
Abrasion loss/mm3≤ |
Hardness/（o）±105 |
|
Before ageing |
14.0 | 400 | 250 | 60 |
|
After ageing |
12.0 | 340 | - | 65 |
|
Note：When any cover thickness is 0.8mm-1.6mm, sample thickness can be the maximum cutting thickness. At the moment, Tensile strength and Breaking elongation can be allowed 15% lower than the values in this table. |
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Acid-alkali Resistant Properties of Rubber Cover:
|
Class |
Soak liquid |
Concentration |
Soak conditions |
Change rate of properties before and after soaking |
|
|
Volume expansion rate |
Change rate of tensile strength |
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| A1 |
Hydrochloric acid(HCl) |
18% | 50℃×96h |
≤+10% |
≥-10% |
| A2 |
Sulfuric acid(H2SO4) |
50% | 50℃×96h |
≤+10% |
≥-10% |
| A3 |
Sodium hydroxide(NaOH) |
48% | 50℃×96h |
≤+10% |
≥-10% |