Casio Computer Co., Ltd.

Casio Electronics Manufacturing Co., Ltd.

Hideki Ikeda

Yuichiro Iegaki

Yuta Kan

Kenji Kihira

Toshiaki Kanamura

Hideyoshi Niinuma

Hideki Hasegawa

An electrophotographic toner which is excellent in grindability, fixing property and durability by being obtained via a step of melt-kneading a mixture containing an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000 so as to obtain a kneaded mixture, and a step of grinding the kneaded mixture after hardening.

Electrophotographic toner using bioplastic and production method thereof

An electrophotographic toner having good grindability, and excellent fixability and durability, and a method of producing the same are provided. The electrophotographic toner includes an amorphous bioplastic having a weight average molecular weight (Mw) of 30,000 to 100,000, and at least one of a phenol resin and a terpene phenol resin as a grinding aid.

Electrophotographic toner using bioplastic and method of producing the same

An erasable electrophotographic toner includes a binder resin, a near-infrared absorbing material, a decolorizing agent and an organic white pigment.

Erasable electrophotographic toner containing organic white pigment and method of producing the same

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Hamura, Japan

Hideki Ikeda