Fuji Xerox Co., Ltd.

Xerox Corporation

Fuji Xerox Corporation

Katsumi Daimon

Katsumi Nukada

Yasuo Sakaguchi

Masakazu Iijima

Takashi Imai

Akira Imai

Norihito Fukushima

Hirokazu Hamano

Manabu Serizawa

Kiyokazu Mashimo

Toru Ishii

Ryosaku Igarashi

Hidemi Nukada

Yuka Ishihara

Kazuo Yamasaki

Shuji Sato

Yusuke Ikeda

Akihiko Tokida

Shigeru Hayashi

Hiroshi Nakazawa

Fumiaki Tambo

Sandra J Gardner

Susumu Yoshino

Yosuke Tsurumi

George Liebermann

Masaki Nakamura

Ichiro Takegawa

Richard A Burt

Kazufumi Tomita

Takahiro Suzuki

Yasuo Matsumura

Satoshi Yoshida

Gordon K Hamer

Yasuhiro Yamaguchi

Noriyuki Mizutani

Masanori Ichimura

Chisato Urano

Masato Mikami

Moegi Iguchi

Carol A Jennings

Fumio Ojima

Shinpei Takagi

Michiaki Takahashi

Timothy J Fuller

Peter Michael Kazmaier

Barkev Keoshkerian

Satoshi Inoue

Wataru Yamada

Hiroyuki Tanaka

Cheng-Kuo Hsiao

Daniel A Foucher

Dasarao K Murti

Yasushige Nakamura

Ram S Narang

Masaru Takahashi

Hideo Maehata

Seiichi Takagi

Masaaki Suwabe

Yutaka Sugizaki

Kazuhiro Koseki

Masayuki Nishikawa

Osamu Ide

Isao Ito

Emi Takahashi

Toyofumi Inoue

Soichiro Kitagawa

Jun Igarashi

Yasuhiro Arima

Kohichi Yamamoto

Hirokazu Yamada

Toshimizu Ozawa

Yosuke Tsurmi

The invention provides an electrophotographic toner having a crystalline polyester resin; a non-crystalline polyester resin; a colorant; and a releasing agent. A resin (i), that is included in a toluene-soluble component of the toner and having a molecular weight of 30,000 to 100,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value A. A resin (ii), that is included in a toluene-soluble component of the toner and having a molecular weight of 8,000 to 12,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value B. A resin (iii), that is included in a toluene-insoluble component of the toner, has an acid value C. The acid values A, B, and C satisfy the inequation of B&#x3e;A&#x3e;C. The invention further provides an electrophotographic developer using the toner, a toner cartridge storing the toner, and an image forming method using the developer.

Electrophotographic toner, electrophotographic developer, toner cartridge, and image forming method

An electrostatic latent image developing toner includes a mother particle which contains a coloring agent, a release agent and a binder resin; and an inorganic particle which is added to the surface of the mother particle, and wherein a relation between a relaxation time t and a relaxation modulus G(t) which are determined from the dynamic viscoelasticity measurement made on the toner satisfies the following equations (1) and (2);(1)&#x3c;100 Pa&#x2003;&#x2003;(1)515&#x3c;((2)&#x2212;(1))/(log(1)&#x2212;log(2))&#x3c;1,230&#x2003;&#x2003;(2)

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

An embodiment of the present invention provides an electrostatic image developing toner including a binder resin containing amorphous polyester resin containing a tin-containing catalyst and crystalline polyester resin containing a titanium-containing catalyst, and a colorant and a releasing agent, an electrostatic image developer using the same, a toner cartridge, a process cartridge, and an image forming apparatus.

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

The invention provides a toner for electrostatic latent image development comprising a first component and a second component which are isolated from each other and capable of forming a color when the first component and the second component are brought into reaction with each other, and a photo-curable composition containing either the first component or the second component, the photo-curable composition not being capable of forming a color when the photo-curable composition is not cured, that is irreversibly controlled to a state of being capable of forming a color by irradiating light having a specific wavelength at which the photo-curable composition is cured.

Toner for electrostatic latent image development, production method thereof, and developer for electrostatic latent image development

An electrophotographic toner that includes a colorant, a release agent, a non-crystalline resin and a crystalline resin, wherein the crystalline resin is a polyalkyl acrylate or polyalkyl methacrylate having an alkyl group of approximately 18 or more carbon atoms, and is produced by copolymerization with approximately 10 mol % or more, but no more than approximately 50 mol %, of a vinyl monomer having a carboxyl group.

Electrophotographic toner and electrophotographic developer and image forming method

The present invention provides a toner for electrophotography having a capsule structure including a core and a shell that covers the core, wherein the core contains a colorant, a releasing agent, an amorphous resin, and a block polymer containing a crystalline part and an amorphous part, the weight-average molecular weight of the block polymer is 10,000 or more, the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer is 1000 to 5000, and the weight-average molecular weight of the resin used in formation of the crystalline part of the block polymer is at least 2 times the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer, a method of manufacturing the same, a developer for electrophotography including the toner and a carrier, and an image forming method using the developer for electrophotography.

Toner for electrophotography, manufacturing method of toner for electrophotography, developer for electrophotography, and image forming method

The present invention relates to a toner for electrostatic image development, comprising a crystalline ester compound synthesized by polymerizing a carboxylic acid component with an alcohol component, a non-crystalline resin, a colorant and a releasing agent, wherein the weight-average molecular weight of the crystalline ester compound is 5000 or less, and the number of carbon atoms in at least one component selected from the carboxylic acid component and the alcohol component is 10 or more.

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

Provided are a toner for developing an electrostatic image comprising a crystalline resin having an ester bond and at least one of a sulfide bond or a disulfide bond in the main-chain, an electrostatic image developer and an image-forming process by using the same, a method of producing the toner for developing electrostatic image, and a resin particle dispersion using the same.

Toner for developing electrostatic image, production method thereof, resin particle dispersion, and electrostatic image developer

Provided are an electrophotographic toner, comprising a binder resin containing a coloring agent, a crystalline resin and an amorphous resin, wherein the crystalline resin has two or more peaks in weight-average molecular weight as determined by gel permeation chromatography, one of the peaks has a weight-average molecular weight in the range of 15,000 to 40,000, and another peak has a weight-average molecular weight in the range of 2,000 to 10,000 and a production method thereof, and an electrophotographic developer and an image-forming process using the electrophotographic toner.

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

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 supporting material for fixably supporting a color toner image, the material including a base material, a light scattering layer provided on the base material and containing a white pigment and a thermoplastic resin, and a color toner receptive layer provided on the light scattering layer and containing at least a thermoplastic resin, wherein the thermoplastic resin in the light scattering layer is constituted of a polyolefin or a polyolefinic copolymer having a temperature, at which viscosity becomes 5&#xd7;10Pa&#xb7;s, of 100&#xb0; C. or higher, and the thermoplastic resin in the color toner receptive layer is constituted of a resin obtained by melt mixing of a crystalline polyester resin and an amorphous resin and having a temperature, at which viscosity becomes 10Pa&#xb7;s, equal to or higher than 65&#xb0; C. but lower than 80&#xb0; C.

Image supporting material, method for use thereof and image forming apparatus utilizing the same

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.

Image fixing apparatus and image fixing method for a crystalline resin-containing toner

An electrophotographic photoreceptor with excellent wear resistance and high durability, and an image formation method having a high toner transferring efficiency and capable of providing images with high quality. The image formation method features a developing step of forming a toner image by developing an electrostatic latent image formed on the surface of a latent image carrier by a developer containing at least a toner, a transferring step of forming a transferred image by transferring the toner image formed on the surface of the latent image carrier to the surface of an object recording medium, and a fixing step of fixing the toner image transferred on the surface of the object recording medium. The latent image carrier has a surface layer containing a cross-linked resin having charge transporting property, and the toner is a toner containing at least a binder resin of mainly a crystalline resin and a coloring agent.

Image formation method

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Minami-ashigara, Japan

Katsumi Daimon