MAGNETIC POWDER FOR COMPRESSED MOLDING, MAGNET COMPOUND FOR COMPRESSED MOLDING, LONG-LENGTH MAGNET FORMING BODY, MAGNET ROLLER, DEVELOPING AGENT CARRIER, DEVELOPING APPARATUS, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide magnetic power for compressed molding magnet ensuring higher coersive force and reduction in fluctuation of magnetic density even in the long-length magnet.

SOLUTION: The magnetic powder for compressed molding magnet 10A, constituted with non-angled magnetic particle 1 of the average gain size of 100 to 200 μm, is assumed to be adjusted in its volume density to 3.3 g/cm3to 4.0 g/cm3. The magnetic particle 10A for compressed molding magnet adjusted in its volume density to 3.3 g/cm3to 4.0 g/cm3is formed with collision of the angled magnetic particles, or with collision of the angled magnetic particle and the particle constituted with a substance which is harder than the angled magnetic particle. At least a part of the surface of magnetic particle 1 forming the magnetic powder 10A for compressed molding magnet preferably includes a layer to be covered constituted with polyurethane resin or compressed bridge producing substance of polyurethane resin and amino resin.

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