Semiconductor rolls.

摘要

A semiconductive roll is prepared by molding and curing a silicone rubber composition to a mandrel to form a semiconductive layer. The silicone rubber composition includes (A) 100 parts by weight of a diorganopolysiloxane, (B) 5 to 200 parts by weight of spherical silicone elastomer particles having a mean particle size of 0.1 to 100 mu m, and (C) a conductive material, typically conductive carbon black, zinc oxide or titanium oxide. The roll has stable, minimal varying resistivity in the semiconductive region which does not depend on molding conditions.