Fuji Xerox Co., Ltd.

Mitsubishi Oil Co., Ltd.

Takeshi Shoji

Manabu Serizawa

Yasuo Matsumura

Shuji Sato

Takao Ishiyama

Yosuke Tsurumi

Toshiaki Hasegawa

Fusako Kiyono

Masaaki Suwabe

Yasuo Kadokura

Hisao Morijiri

Yukiko Watanabe

Masanobu Ninomiya

Hiroshi Nakazawa

Sakon Takahashi

Hideo Maehata

Hiroshi Kamada

Akihiro Iizuka

Takahiro Mizuguchi

Atsushi Sugawara

Takashi Inukai

Norihito Fukushima

Eisuke Iwazaki

Shinya Nakashima

Atsuhiko Eguchi

Eiji Kawakami

Yoshio Takahashi

Takahiro Mizoguchi

An electrostatic charge image developing carrier contains a core particle and a resin coat layer on a surface of the core particle, wherein the core particle has a BET specific surface area of from 0.05 m/g to 0.10 m/g, and the resin coat layer contains a nitrogen-containing (meth)acrylate resin.

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

An electrostatic charge image developer contains toner including toner particles, and strontium titanate particles having a volume average particle diameter of 3 &#x3bc;m to 7 &#x3bc;m. The electrostatic charge image developer also contains a carrier including core particle, and a coating layer that coats the core particle and contains a cyclohexyl methacrylate resin.

Electrostatic charge image developer, developer cartridge, process cartridge, and image forming apparatus

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.

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

An electrostatic image developing carrier includes a ferrite particle and a resin layer that coats the ferrite particle, wherein a magnesium element content of the ferrite particle is from about 3.0% by weight to about 20.0% by weight; wherein a manganese element content of the ferrite particle is from about 0.2% by weight to about 0.8% by weight; and wherein a content of toluene is more than about 100 ppm and not more than about 2,000 ppm.

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

An electrostatic charge image developing carrier includes a core particle and a coating layer with which the surface of the core particle is coated. The coating layer includes an acrylic resin having a constituent unit in which a silicone chain is disposed in a branch.

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

An electrophotographic developer is provided which includes: a toner that includes toner base particles and an external additive attached to a surface of the toner base particles and has an amount of Al on the surface of the toner base particles of from about 0.002 to about 0.02 atm %; and a carrier that includes magnetic particles and a coating resin layer that coats the magnetic particles, the coating resin layer including particles with a volume-average particle diameter of from about 80 to about 800 nm, such as organic particles or inorganic particles having an organic layer on a surface of the inorganic particles, the carrier satisfying any one of the following formulas, where SP1, SP2 and SP3 represent a solubility parameter of resin of the coating resin layer, the organic particles, and the organic layer respectively:about 10&#x3e;|SP1&#x2212;SP2|&#x3e;about 4&#x2003;&#x2003;(1); andabout 10&#x3e;|SP1&#x2212;SP3|&#x3e;about 4&#x2003;&#x2003;(2).

Electrophotographic developer, developer cartridge, process cartridge, and image forming apparatus

An electrophotographic carrier includes a magnetic core material and a resin layer that coats the magnetic core material, the resin layer comprising a resistance control agent and a polymer including a repeating unit derived from an alicyclic group-containing methacrylic ester, the resin layer including a monomer as a base material of the repeating unit in the polymer in an amount of from about 0.5% by weight to about 3.0% by weight relative to the total amount of the resin layer.

Electrophotographic carrier, electrophotographic developer, process cartridge and image forming device

An electrostatic charge image development carrier includes magnetic core particles and a resin coating layer that contains titanium dioxide particles doped with niobium and coats each of the magnetic core particles.

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

The invention provides a toner for electrostatic image development having at least a binder resin and a colorant and having an existence ratio of an IA Group element, from which hydrogen is excluded, measured by XPS (X-ray Photoelectron Spectroscopy) in a range of about 0.03 to 1.0 atom % and a total of existence ratios of an IIA Group element, an IIIB Group element and an IVB Group element, from which carbon is excluded, measured by XPS in a range of about 0.05 to 2.0 atom %. The invention further provides an electrostatic image developer having at least a carrier and the toner, and an image forming method including at least developing an electrostatic latent image with a developer containing at least the toner to form a toner image.

Toner for electrostatic image development, electrostatic image developer and image forming method using the same

A toner for electrostatic image development comprising a binder resin and a colorant, the toner having a content of an aluminum element with respect to carbon of approximately 0.005 atm % to approximately 0.02 atm % as measured by X-ray photo-electron spectroscopy.

Toner for electrostatic image development, manufacturing method thereof, electrostatic image developer and image forming method

A toner for developing an electrostatic image excellent in fixing property and particularly in light transmissibility and coloring property and satisfying high image quality and high reliability, and a process for producing the same, as well as a developer for an electrostatic image and a process for forming an image are provided. The toner for developing an electrostatic image contains at least a resin component and colorant particles, and the colorant particles exhibit a dispersion state inside the toner observed by a transmission electron microscope. The dispersion state satisfies two conditions, where (1) the colorant particles have a dispersion average particle diameter of 100 nm or less, and (2) the colorant particles have a content of coarse particles of a diameter of 400 nm or more 5% by number or less of the total of the colorant particles.

Toner for developing electrostatic image, process for preparation of the same, developer for electrostatic image, and process for forming image

The invention relates to a toner for developing an electrostatic latent image, a process for producing the same, a developer for an electrostatic latent image, and a process for forming an image, and the toner contains a binder resin and a coloring agent and has a molecular weight between crosslinking points Mc obtained by a measurement of temperature dispersion on dynamic viscoelasticity of from 3.6&times;10 to 7.5&times;10 , and the molecular weight between crosslinking points Mc and a crosslinking density Me satisfying the relationship 14.0&lE;Log (Mc/Me)&lE;16.5.

Toner for developing electrostatic latent image, process for producing the same, developer and process for producing image

There is provided a toner for the development of an electrostatic image having a complex viscosity &eegr;* of from 3.0&times;10,to 1.2&times;10,Pas at 160&deg; C. and a loss tangent tan &dgr; of from 0.60 to 1.60 as determined by temperature dispersion measurement method by sinusoidal oscillation method, a method for manufacturing the toner by a coaggregation fusion composite method, developer, and an image forming method.

Toner for the development of electrostatic image, process for the preparation thereof, electrostatic image developer, and process for the formation of image

Electrostatic image developing toner, production method thereof, electrostatic image developer and image-forming process

It is to easily form a fixed image, especially a full color image, that exhibits a small difference in gloss depending on the fixing conditions of the toner, is excellent in smoothness, exhibits small unevenness of gloss, and has high image quality and high reliability. A toner for developing a static image to be fixed by heat on a fixing substrate, wherein a fixed image has a gloss Gm of about 20% or more, and a maximum value of a degree of change Gs of the gloss per 1&deg; C. of a difference of a surface temperature within a range of about from 140 to 170&deg; C. of a fixing member as a heating and fixing unit is 1.8% or less per 1&deg; C.; and a developer for a static image and a process for producing an image using the toner are provided.

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Kanagawa, Japan

Takeshi Shoji