China 2021 Hot Sale Prefabricated Rubber Roll Type Running Track Surface, Find details and Price about China Synthetic Tracking, Running Tracking from 2021 Hot Sale Prefabricated Rubber Roll Type Running Track Surface
Inspectionn item | Technical requirementes | Results |
Appearance | It is uniform color and luster,without evident chromaic aberration and no crack and stractification | √ |
Hardness (shorea), HB | 60-75 | 70 |
Rebound, % | ≥8 | 11 |
Strength of extension Mpa | ≥2.0 | 3.2 |
Tensile yield | ≥100 | 152 |
Smoldering, class | 1 | 1 |
Thickness, mm | 5.0±0.5 | 5.1 |
Difference of thickness, mm | ≤0.5 | 0.3 |
Friction coefficient | ≤0.55-0.75 | 0.65 |
Vinyl chloride,mg/kg | ≤5 | Not detected |
Soluble hcavy Metal, mg/sqm | ≤20 cadmium | 0.78 |
≤20 plimbum | 0.39 | |
Volatile content,g/sqm | ≤75 | 7.6 |