| 摘要 |
PURPOSE:To obtain an electrostatic charge image developing carrier superior in humidity resistance, small in deterioration of triboelectrification characteristics, and capable of stable development in a long term by coating the surface of a core material with a specified polymethacrylate. CONSTITUTION:A polymer used for the carrier is obtained by polymerizing cycloalkyl methacrylate, such as cyclohexyl methacrylate, and has >=about60 deg.C glass transition point. It may be a copolymer of said monomer and styrene or vinyl acetate. A carrier core material, such as sand, glass powder, or iron powder having about 30-1,000mum particle diameter, is coated with a soln. of said polymer and dried to form a coating layer made of said polymer on the surface of the core material, serviceable as a carrier. |
