| Compound | NR/BR blend | ENR-25/BR blend | ||||
|---|---|---|---|---|---|---|
| NR/BR/CB-C (5:30) | NR/BR/CB-C (11:00) | NR/BR/CB-Y | ENR/BR/silica-C (7:30) | ENR/BR/silica-C (15:00) | ENR/BR/silica-Y | |
| Bound rubber contents (%) | 31 | 31 | 34 | 40 | 41 | 43 |
| Composition (NR:BR) | 54:46 | 54:46 | 58:42 | - | ||
| Composition (ENR:BR) | - | 78:22 | 78:22 | 71:29 | ||