Resin-coated carrier for electrophotographic developer and electrophotographic developer using the resin-coated carrier

摘要

Object of the present invention is to provide a resin-coated carrier for an electrophotographic developer with reduced carrier weight, carrier beads carry over is prevented, and further, excellent in carrier strength and stable charging property in endurance printing. To achieve the object, the carrier having a coated resin layer on the surface of a porous ferrite core material and the pore volume and the peak pore size of the porous ferrite core material are 55 to 160 mm3/g and 0.2 to 0.7 μm, respectively, and an electrophotographic developer using the resin-coated carrier is adopted.

主权项

1. A resin-coated carrier for an electrophotographic developer, wherein the carrier has a coated resin layer on the surface of a porous ferrite core material, and
the pore volume and the peak pore size of the porous ferrite core material are 55 to 160 mm3/g and 0.2 to 0.7 μm, respectively, and wherein the pores of the porous ferrite core material are not impregnated with a resin.