ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER AND PRODUCTION THEREOF

摘要

PURPOSE:To efficiently produce an electrostatic charge image developing carrier capable of forming a high-quality picture uniform in density and free from stains by improving the charge maintainability of the carrier and preventing the deposition of the carrier on a picture. CONSTITUTION:This carrier is coated with at least two kinds of resins. The softening points of the resins are different from each other by >=30 deg.C. The peak of heat of fusion of the blended coating resin by the differenital scanning calorimeter corresponding to the softening point of the high-softening-point resin is controlled to >=30% of the heat of fusion of the blended resin. The coating resin and a nuclide grain are mixed in a dry state, the mixture is heated and melted to coat the grain, and the desired carrier is produced.