Mitsubishi Chemical Corporation

Mitsubishi Kasei Corporation

Takatsugu Takehara

Takashi Shintaku

Mikio Uno

Yoshihiro Kigami

Disclosed is a carrier for the development of an electrostatic image comprising a magnetic metal or oxide thereof incorporated therein as a core material, the core material being coated with a resin, wherein the following relationships (1) and (2) are satisfied:

Carrier for the development of electrostatic image and developer

Disclosed is a method for producing a toner for developing electrostatic images, which comprises the steps of kneading a mixture of raw materials comprising at least a resin and a colorant, cooling the kneaded mixture, pulverizing the cooled mixture, classifying the pulverized mixture, and feeding a fine powder separated by the classification step to a melt of the mixture of raw materials in the middle of the kneading step. The toner has improved fixability, durability and storage stability, with which stable and high-quality images are obtained even by continuous copying operation.

Method for producing toner for developing electrostatic images

A novel toner for developing electrostatic images is disclosed, which comprises at least a resin and a granulated carbon black having a grain hardness of 2 g or less as starting raw materials blended therein. In addition, a novel process for the production of the novel toner is described.

Toner for developing electrostatic image and process for production

Disclosed herein is an electrostatic image-developing toner comprising particles of a toner precursor particles composed of at least a resin and a colorant, and powder of a compound represented by the following formula (I):

Growing community of inventors

Kanagawa, Japan

Takatsugu Takehara