MAGNET ROLLER, DEVELOPING ROLLER, DEVELOPMENT DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a magnet roller by extrusion molding having high magnetic characteristics.

SOLUTION: The magnet roller 10 has a cylindrical magnet 2 formed by extrusion molding a resin composition containing 92 to 95wt% anisotropic magnetic powder and 8 to 5wt% polymeric material to a pipe form while applying a magnetic field thereto within a mold, wherein the storage elastic modulus of the resin composition at ordinary temperature is confined to ≤10 MPa.

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