Method for producing carrier for electrostatic charge image development, method for producing electrostatic charge image developer, image forming method, and carrier for electrostatic charge image development

• Main Authors: Tanabe, Takeshi, Anno, Shintaro
• Format: Patent
• Language: English
• Published: 18.06.2024
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

A method for producing a carrier for electrostatic charge image development includes coating magnetic particles by adding the magnetic particles and a coating liquid containing a resin and a solvent to a mixer with a stirring blade to form a resin coating layer on surfaces of the magnetic particles and taking a carrier having the resin coating layer out of the mixer. In the coating, the stirring conditions after the solvent is evaporated and dried by heating in the mixer until the carrier is taken out of the mixer satisfy Formula 1 below and Formula 2 below:0.2≤peripheral speed πDn (m/s) of stirring blade≤2.0  Formula 1,1×103≤stirring workload (peripheral speed×stirring time T)≤4×103  Formula 2,where D represents a diameter (m) of the stirring blade, n represents a number of revolutions (rps) of the stirring blade, and T represents a time (s) from a time point at which, after a load power of the stirring blade before drying of the solvent increases with drying until completion of drying, a load power of the stirring blade decreases to 1.3 times or less the load power of the stirring blade before drying to a time point at which stirring in the mixer is stopped.