| Testing Item | Index | Test Method | |||
| Volatile matter(%)≤ | 0.6-0.9 | GB/T6737 | |||
| Ash content | ≤0.50 | GB/T4498A | |||
| Organic acid(%) | 4.50~6.75 | GB/T8657A | |||
| Soap content(%) | ≤0.5 | ||||
| Combinated Styrene content(%) | 22.5~24.5 | GB/T8658 | |||
| Raw rubber mooney viscosity ML(1+4)100°C |
45~55 | 44~56 | GB/T1232.1 | ||
| Compounded rubber mooney viscosity ML(1+4)100°C≤ |
93 | ||||
| 300% Stretching Stress (145°C)/MPa |
25min | 15.2~19.1 | 14.7~19.6 | GB/T8656A | |
| 35min | 20.6±2.0 | 20.6±2.5 | |||
| 50min | 21.5±2.0 | 21.5±2.5 | |||
| Tensile strength (145°C, 35min)/MPa |
≥25.5 | ≥25.5 | ≥24.5 | ||
| Elongationg at break (145°C, 35min)/% |
≥340 | ≥330 | |||
