Powdertech Co., Ltd.

Aya Sakuta

Tetsuya Uemura

Hiroki Sawamoto

Makoto Ishikawa

The present invention relates to a carrier including: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material, in which the resin coating layer contains a binder resin, and fluorine element-containing resin particles dispersed in the binder resin, the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/μmor more and 350 particles/μmor less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less.

Carrier, xerographic developer, and carrier production method

There is provided a carrier including a magnetic core material having a surface coated with a surfactant-containing resin mixture of an elemental fluorine-containing resin and a polyimide resin. The carrier has an elution amount of an eluted material into water in an elution test ranging from 180 ppm to 3,500 ppm.

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Kashiwa, Japan

Aya Sakuta