Table 3. Mixing Procedure of CB-filled NR/BR Blend Compounds

Types CB-filled NR/BR blend compounds (Dump temp.: 140°C 145°C)
NR/BR/CB-C (5:30) NR/BR/CB-C (11:00) NR/BR/CB-Y
step Time (min:s) Action
first stage 0:00 Add Rubber (NR/BR) Add NR/CB MB and BR/CB MB
1:30 Add ½ (CB + oil) -
2:30 Add ½ (CB + oil) -
3:30 Add additives
5:30 Dump - Dump
11:00 - Dump -
second stage 0:00 MB from first stage (initial temp.: 50°C)
0:30 Add curatives
2:30 Dump (dump temp.: 80°C 90°C)