Table 3. Mixing Procedures

Time, min:s Action
1st stage 0:00-0:40 Rubber (initial temp.: 100°C)
0:40″-1:40 Silica 1/2+X50S 1/2+DPG1/2+oil1/2+LqBR1/2
1:40-2:40 Silica 1/2+X50S 1/2+DPG1/2+oil1/2+LqBR1/2
2:40-5:00 ZnO, St/A, 6PPD
5:00 Ram up
5:00-7:40 Extra mixing and dump (dump temp.: 150°C-155°C)
2nd stage 0:00-0:20 Master batch from 1st stage (initial temp.: 50°C)
0:20-2:00 Curatives and dump (dump temp.: 80°C-90°C)