Fuji Xerox Co., Ltd.

Fuji Xerox Corporation

Norihito Fukushima

Katsumi Daimon

Hirokazu Hamano

Manabu Serizawa

Takashi Imai

Yuka Ishihara

Toshiaki Hasegawa

Yosuke Tsurumi

Shintaro Anno

Masaki Nakamura

Sakon Takahashi

Masanori Ichimura

Chisato Urano

Masato Mikami

Yasuaki Hashimoto

Toshimizu Ozawa

Shuji Sato

Katsuyuki Kitajima

Shunsuke Nozaki

Toshiyuki Yano

Masaaki Suwabe

Michio Take

Takeshi Shoji

Akihiro Iizuka

Fumio Ojima

Kazufumi Tomita

Rieko Kataoka

Jun Igarashi

Takahiro Yamashita

Takeshi Tanabe

Yasuhiro Arima

Yoshinari Ueno

Hirokazu Yamada

An electrostatic charge image developing carrier includes a core particle and a resin coating layer coated on the core particle, wherein the resin coating layer contains a cationic surfactant and an anionic surfactant and a total content of the cationic surfactant and the anionic surfactant in the resin coating layer is from 0.1% by weight to 6.0% by weight with respect to the entire resin coating layer.

Electrostatic charge image developing carrier, electrostatic charge image developer, and developer cartridge

An electrostatic charge image developing carrier includes a magnetic core particle, and a coating layer that coats surfaces of the magnetic core particle, wherein the coating layer includes a binder resin, thermosetting resin particles, and crosslinked resin particles, and the crosslinked resin particle contains a polymer formed by polymerizing a monomer component including the same monomer as a monomer used in the polymerization of the binder resin.

Electrostatic charge image developing carrier, electrostatic charge image developer, developer cartridge, process cartridge, and image forming apparatus

An electrostatic latent image developer contains: an electrostatic-latent-image-developing toner that has toner particles formed by aggregating and fusing particles of a polyester resin, particles of a styrene resin and particles of a coloring agent in a starting material dispersion liquid of those particles dispersed in an aqueous solvent; and a carrier having a core particle and a resin coating layer to coat the surface of the core particle, wherein the ratio of the exposed area of the core particle to the surface of the carrier is about 7% or less.

Electrostatic latent image developer, developing apparatus, image forming apparatus and image forming method

A two-component developer including a yellow toner and a carrier, the yellow toner including at least one of C. I. Pigment Yellow 155 or C. I. Pigment Yellow 185, and an azo pigment, the carrier including a first resin, magnetic particles dispersed in the first resin, and elements of Cu, Zn, Ni and Mn each in an amount of from 0 to about 2,000 ppm.

Two-component developer, developer cartridge, process cartridge and image formation apparatus

A carrier for a two-component developer, includes: magnetic particles and a resin coating layer that is coated on the magnetic particles, the resin coating layer containing metal nitride particles having a volume average primary particle diameter of from about 300 to about 2,000 nm.

Carrier for two-component developer, two-component developer, image forming method, and image forming apparatus

A carrier for developing an electrostatic charge image comprising a core material and a coating resin layer that covers the core material, wherein the core material is a ferrite particle having a Brunauer-Emmitt-Teller (BET) specific surface area of from about 0.12 m/g to about 0.20 m/g, and having a fluidity of from about 26 sec/50 g to about 30 sec/50 g.

Carrier for developing electrostatic charge image, developer for developing electrostatic charge image, developer cartridge for developing electrostatic charge image, process cartridge, image forming apparatus, and image forming method

A carrier for a two-component developer includes magnetic particles, and a resin coating layer that covers the magnetic particles. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm.

A method of producing a carrier for electrophotography includes: covering a surface of a core particle with a coating layer including resin particles and a crosslinking resin in an uncrosslinked state present in spaces between the resin particles; and applying a mechanical impact from the outer surface of the coating layer before crosslinking of the crosslinking resin.

Method of producing a carrier for electrophotography and method of producing a developer for electrophotography

A carrier for developing an electrostatic charge image, including a core, and a coating layer including a resin and inorganic oxide particles that exhibit electroconductivity, by which the core is coated, wherein the inorganic oxide particles have, when they are aggregated, an aggregation size of, or when they are not aggregated, a primary particle size of, from 230 nm to 970 nm.

Carrier for developing electrostatic charge image, developer for electrostatic charge image, process cartridge and image forming apparatus

An electrostatic image developing toner including a binder resin; and a colorant, and satisfying following conditions (1) and (2):0.02&#x2266;&#x2266;0.20&#x2003;&#x2003;(1)1&#x2266;&#x2266;15&#x2003;&#x2003;(2)wherein Crepresents an amount of a carboxyl group and its salt on a surface of the toner, Crepresents an amount of a carboxyl group and its salt in the entire toner, Nt represents an amount of a nitrogen element on the surface of the toner, and St represents an amount of a sulfur element on the surface of the toner.

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

A toner for developing an electrostatic charge image, includes: a binder resin formed by reacting a polymerizable aromatic monomer having an ethylenically unsaturated double bond conjugated to an aromatic ring thereof, a nitrogen-containing polymerizable aliphatic monomer having an ethylenically unsaturated double bond and a sulfur-containing aliphatic compound to each other; and a colorant, wherein a ratio (MN/MS) of an amount of nitrogen (MN) to an amount of sulfur (MS) is in a range of from 1.0 to 15.

Toner for developing electrostatic charge image, electrostatic charge image developer, image forming method and image forming apparatus

A toner for electrophotography contains a binder resin and a coloring agent, and is characterized in that the binder resin contains a crystalline polyester resin, and a low-molecular compound having at least one of a naphthalene skeleton and a biphenyl skeleton, and the crystalline polyester resin contains 0.5 to 30 construction mole % of an aromatic dicarboxylic acid-derived constitutional component. Further, a developer for electrophotography and an image forming method using the toner for electrophotography are disclosed.

Toner for electrophotography and developer for electrophotography, as well as image forming method

An electrophotographic toner having a core-shell structure including a crystalline resin in its core region or a sea-island structure including a crystalline resin in its island region, wherein the toner has 1) a resistance of 5.0&#xd7;10&#x3a9;&#xb7;cm or higher, 2) a dynamic viscosity coefficient of 3&#xd7;10Pa&#xb7;s or higher at a temperature which is 50&#xb0; C. higher than a melting point of the crystalline resin, and 3) a dynamic viscosity coefficient of 1&#xd7;10Pa&#xb7;s or lower at a temperature which is 10&#xb0; C. higher than the melting point of the crystalline resin.

Electrophotographic toner, method for producing the same, electrophotographic developer, and image forming method

The present invention provides an image forming method for efficiently thermoelectrically transferring and fixing a toner image formed on an electrostatic latent image carrier without scattering of the toner. The image forming method comprises the steps of charging a surface of an electrostatic latent image carrier; exposing the charged surface of the electrostatic latent image carrier to a light beam using optical data corresponding to image data to form a latent image; developing the latent image formed on the surface of the electrostatic latent image carrier with a developer for electrophotography containing a toner for electrophotography to form a toner image; and thermoelectrically transferring the toner image formed on the surface of said electrostatic latent image carrier onto a surface of a recording medium and simultaneously fixing thereon. The toner for electrophotography is comprised of a crystalline polyester resin, the surface temperature of a fixing unit therein is higher by 10&#xb0; C. or greater than the melting point of said crystalline polyester resin, and the glass transition temperature of the outermost surface layer of the electrostatic latent image carrier is higher by 10&#xb0; C. or greater than a surface temperature of the fixing unit.

Image forming method

An image fixing method capable of favorably fixing a toner containing a crystalline resin is provided. A transfer medium having unfixed images formed of a color toner containing a binder resin that contains a crystalline resin and a colorant is passed between a heating member heated by way of an external heating unit and a pressurizing member, thereby fixing the unfixed images.

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Minami-ashigara, Japan

Norihito Fukushima