Mostly rubber carbon black is black beads, includes caron black N220, N231, N234, N315, N326, N330, N339, N375, N539, N550, N660, N774. They are mainly used as reinforcing agent as well as strengthening agent and filling agent in rubber products such as belts, tires, cord layer of tires, tread rubbers, coverying rubbers, sidewall of tires, the rubber material for extrusion or calendered goods, inner tubes, bicycle tires, rubber tubes, rubber tapes, cable ropes, shoes kind, and patterns.
