Fuji Xerox Co., Ltd.

Junichi Tomonaga

Hitomi Akiyama

Yasunobu Kashima

Yasuo Matsumura

Satoshi Yoshida

Takeshi Iwanaga

Yasuo Kadokura

Shuji Sato

Hiroyoshi Okuno

Hideaki Yoshikawa

Kiyoshi Hashimoto

Manabu Serizawa

Shunsuke Nozaki

Hiroyuki Moriya

Takao Ishiyama

Masaaki Suwabe

Michio Take

Yuichi Yashiki

Eiji Kawakami

Takahiro Mizuguchi

Naoki Ohta

Yuji Isshiki

Hideyuki Akagi

Yasushi Sakata

Takashi Hara

Hisao Morijiri

Kazuya Mori

Masayuki Takei

Kazunari Muraoka

Takahiro Mizukuchi

Takeshi Shouji

Kouichi Sugiyama

A method for manufacturing a fatty acid metal salt particle includes forming a coating layer including a fatty acid metal salt on a surface of a core material particle in supercritical carbon dioxide.

Method for manufacturing fatty acid metal salt particle, and fatty acid metal salt particle

An electrostatic image developing toner including: a toner particle containing a binder resin having a polyester resin and a coloring agent; and a non-colored particle containing a polyester but not containing a coloring agent and having a shape factor SF1 of not more than 110, wherein an amount of Sn element contained in the non-colored particles is larger than an amount of Sn element contained in the toner particle.

Electrostatic image developing toner, electrostatic image developer, process cartridge, image forming apparatus, and image forming method

A toner for electrostatic image development including: a toner particle containing a polyester resin and a coloring agent; and an uncolored particle containing a polyester resin and not containing a coloring agent, wherein shape factor SF1 of the uncolored particles is 110 or less, and the number of the uncolored particles is 50 or less based on 5,000 toner particles.

Toner for electrostatic image development, developer for electrostatic image development, developer cartridge, process cartridge, and image-forming apparatus, and image-forming method

An electrostatic-image-developing toner includes toner particles containing a binder resin, a colorant, and a release agent, wherein the toner contains colorless binder resin particles and, of the colorless binder resin particles, particles having a volume-average particle size diameter 1.5 times as large as, or larger than that of, D50 of the toner particles are in a proportion of about 30 particles or less particles per 5,000 toner particles, with D50 being a volume-average particle size diameter of the toner particles.

Electrostatic-latent-image-developing toner, electrostatic latent image developer, process for producing electrostatic-latent-image-developing toner, image-forming method, and image-forming apparatus

A yellow toner includes binder resin particles that do not contain a coloring agent or a release agent and have a shape factor SF1 of about 110 or less, the number of the binder resin particles being about 50 or less per 5,000 electrostatic developing toner particles; inorganic particles that have a median diameter of about 5 nm to about 70 nm in an amount of about 0.01 mass % to about 0.4 mass % based on the mass of the yellow toner; and a yellow coloring agent that has an azo group.

Yellow electrostatic developing toner, developer for electrostatic development, production method of electrostatic developing toner, image forming method and image forming apparatus

A magenta electrostatic developing toner includes binder resin particles that do not contain a coloring agent or a release agent and has a shape factor SFof about 110 or less, the number of the binder resin particles being about 50 or less per 5,000 electrostatic developing toner particles; and inorganic particles that have a median diameter of about 5 nm to about 70 nm in an amount of about 0.01 mass % to about 0.4 mass % based on the mass of the electrostatic developing toner; and a magenta coloring agent that has an azo group.

Magenta electrostatic developing toner, developer for electrostatic development, production method of electrostatic developing toner, image forming method and image forming apparatus

An electrostatic latent image developing magenta toner includes at least quinacridone pigment, naphthol pigment, and a release agent. Colorant of the toner satisfies conditions (a) and (b): (a) an average primary particle size D50 of a quinacridone pigment represented by formula (1) and an average primary particle size D50 of a naphthol pigment represented by formula (2) are such that the average primary particle size D50 of the quinacridone pigment is smaller than the average primary particle size D50 of the naphthol pigment; and (b) the average primary particle size D50 of the quinacridone pigment is greater than 20 nm, and the average primary particle size D50 of the naphthol pigment is smaller than 200 nm. Formula (1): Here, each of R, R, R, and Ris selected from the group consisting of H, CH, and Cl, Rand Rare different from each other, and Rand Rare different from each other. Formula (2): 

Electrostatic latent image developing magenta toner, electrostatic latent image developer, toner manufacturing method, and image forming method

The toner for developing an electrostatic charge image has a sharp particle size distribution, an improved cleaning property even if the toner has small particle diameter, and a stable charging property, developing property and transfer property regardless of change of environment. By use of the toner, a highly precise image may be obtained. In a toner for developing an electrostatic charge image prepared by a wet process, the dielectric loss factor of the toner particles is 100 or less. In addition, when the toner particles are dissolved in an organic solvent and mixed with deionized water, the electrical conductance of the solution is desirably 100 ms or less and the surface tension thereof is desirably 20 mN or more. The toner may be obtained by forming agglomerated particles with stirring in a dispersion in which resin particles are dispersed to granulate; heating the toner particles to Tg or higher of the binder resin; stirring; and cleaning. With a wet process, the added stabilizing agent such as a surfactant can be removed.

Toner for developing electrostatic charge image, method of preparing the

A developing sleeve for electrophotography is disclosed which has a coating film comprising electroconductive and preferably lubricating particles dispersed in an acrylic resin in which the content of components having a molecular weight lower than 500 is not higher than 3% by weight. The developing sleeve is effective in preventing development ghosts while preventing toner dusting during transfer from becoming worse and has a small environmental dependence of developing properties.

Developing sleeve for electrophotography and process for image formation

A micromilling device includes a milling chamber, a sorter located in the milling chamber for sorting solid material, nozzles for injecting a stream of solid particles to be milled into the chamber in a predetermined path, and impact elements positioned in the path for impacting the stream of solid material.

Micromilling apparatus

Growing community of inventors

Kanagawa, Japan

Junichi Tomonaga