Mitsubishi Chemical Corporation

Masami Tsurumori

Masayuki Hiroi

Hiroaki Takamura

Yuka Nagao

Tadashi Mizushima

Maki Saito

Tomoko Nakagawa

Tetsuharu Yuge

Usei Jo

Shunichirou Kurihara

Tooru Uenaka

The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount.

Electrostatic image developing toner

To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. (In the formula (1), Arto Areach represents, independently of each other, an arylene group which may have a substituent. Xrepresents a bivalent group (including a single bond) and Xrepresents a bivalent group (including a single bond) with 3 or less atoms.)

Electrophotographic photoreceptor, and image forming device and electrophotographic photoreceptor cartridge using the same member cartridge

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Kanagawa, Japan

Masami Tsurumori