Table 2. Mixing Procedure of Silica Filled ENR/BR Blend Compounds

Types Silica filled ENR/BR blend compounds (initial temp.: 110°C)
step Time (min:s) Action
1st stage 0:00 Add Rubber (ENR/BR)
1:30 Add ½ (Silica + silane + oil)
2:30 Add ½ (Silica + silane + oil)
3:30 Add additives
5:30 Ram up
7:30 Dump (Dump temp.: 150-155°C)
2ndstage 0:00 Silica masterbatch (SMB) from 1st stage (initial temp.: 50°C)
0:30 Add curatives
2:30 Dump (dump temp.: 80-90°C)