... experience ISO9001:2000 certificare We supply diverse model carbon black, for example N220, N330, N550, N660, N339, etc. 1. Type: n220 ... shoes, precipitated or fumed silica has been used as a substitute for carbon black in reinforcing ability. Silica-based fillers are also ... share in automotive tires because they provide better trade-off for fuel efficiency and wet handling due to a lower rolling ...