abstract |
(57) [Abstract] (with correction) PROBLEM TO BE SOLVED: To provide a magnetic carrier capable of forming a high-quality toner image without carrier adhesion, suppressing generation of fog. SOLUTION: This is a magnetic fine particle-dispersed resin carrier in which the surface of a carrier core in which magnetic fine particles are dispersed in a first resin is coated with a second resin. True specific gravity 2.5 to 4.5, magnetization intensity 15 to 60 Am 2 / kg (emu / g), residual magnetization 0.1-20 (Same unit), specific resistance value is 5 × 10 11 to 5 × 10 15 Ω Cm, and (b) the first forming the carrier core Has a methylene unit, (c) the second resin covering the surface of the carrier core has a fluoroalkyl unit, a methylene unit and the like, and (d) the surface of the carrier core has a second surface. Is coated with a mixture of the above resin and a coupling agent having an amino group and a methylene unit, or is coated with a second resin after being surface-treated with the coupling agent. |