Fuji Xerox Co., Ltd.

Shinpei Takagi

Soichiro Kitagawa

Tomohiro Shinya

Satoshi Yoshida

Noriyuki Mizutani

Shinya Sakamoto

Kiyohiro Yamanaka

Susumu Yoshino

Katsumi Daimon

Yusuke Ikeda

Sakon Takahashi

Hideo Maehata

Yutaka Sugizaki

Masahiro Uchida

Yasuhiro Oya

Haruhide Ishida

Etsuo Tominaga

Tomohiro Takeda

Satoshi Inoue

Hiroyuki Tanaka

Daisuke Noguchi

Atsushi Sugawara

Masanobu Ninomiya

Hiroshi Nakazawa

Hirokazu Hamano

Masaru Takahashi

Takao Ishiyama

Michio Take

Atsushi Sugitate

Takahisa Fujii

Atsuhiko Eguchi

Toyofumi Inoue

Hirofumi Shiozaki

Kaori Ohishi

Jun Igarashi

Yasuhiro Arima

Kazusei Yoshida

Yusaku Shibuya

Kousaku Yoshimura

Yosuke Tsurmi

Toyohumi Inoue

Kouzou Ota

A resin composite particle includes a continuous phase formed of a polyester resin, and a dispersed phase formed of a vinyl resin and dispersed in the continuous phase, the volume average particle diameter of the resin composite particles being from 50 nm to 1,000 nm.

Resin composite particle, electrostatic charge image developing toner, and electrostatic charge image developer

An electrostatic charge image developing toner includes a toner particle including a core which contains a styrene (meth)acrylic modified polyester resin and a colorant, and a shell layer which covers the core and contains a styrene (meth)acrylic modified polyester resin and a release agent.

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

An electrostatic charge image developing toner includes toner particles containing an amorphous resin and a crystalline resin, wherein when a softening temperature is measured at 30 points in surface layer parts of the toner particles, a difference (T(&#xb0; C.)&#x2212;T(&#xb0; C.)) between a maximum value (T(&#xb0; C.)) and a minimum value (T(&#xb0; C.)) out of the softening temperatures at the 30 points is from 25&#xb0; C. to 100&#xb0; C.

Electrostatic charge image developing toner and toner container

An electrostatic charge image developing toner includes an unsaturated polyester resin that contains a structural unit derived from a dicarboxylic acid component having an ethylenically unsaturated bond and a structural unit derived from a dialcohol component having a rosin ester group, wherein a surface layer portion of the toner contains a crosslinked material of the unsaturated polyester resin.

Electrostatic charge image developing toner, electrostatic charge image developer, and toner container

An electrostatic charge image developing toner includes toner particles having a core that includes a block copolymer of a crystalline polyester block and an amorphous polyester block, and a shell that covers the core and includes an amorphous polyester resin having an ethylenically unsaturated double bond, and of which a surface layer part includes a crosslinked product of the amorphous polyester resin having an ethylenically unsaturated double bond.

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

An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10&#xb0; C.&#x2266;Ma-Mb&#x2266;45&#xb0; C.

Electrostatic charge image developing toner, method of manufacturing electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, and image forming method

An electrostatic image developing toner including: a toner matrix particle having an adhering particle adhered onto the surface of a central particle, wherein a volume average value of a ratio X of a peripheral length PM to a circle-corresponding diameter D is from 3.6 to 5.0.

Electrostatic image developing toner, method for manufacturing electrostatic image developing toner, developer, and image forming method

Provided is an electrostatic charge image developing toner, each toner particle including a core portion, a first shell layer, and a second shell layer, wherein the core portion contains a first polyester resin, a colorant, and a release agent, the first shell layer contains a second polyester resin and covers the core portion, the second shell layer contains a polymer of an aromatic vinyl monomer and a third polyester resin having an ethylenic unsaturated double bond that is polymerizable with the aromatic vinyl monomer, and covers the first shell layer, and a total amount of the first shell layer and the second shell layer is within a range of from 16% by weight to 40% by weight of the toner particle.

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

A toner for developing an electrostatic charge image, the toner including a binder resin containing a crystalline polyester resin and a noncrystalline polyester resin, a colorant, a releasing agent, a ketone solvent, and an alcoholic solvent, the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being less than about 10 ppm when 0.5 g of the toner is dispersed in 2 g of deionized water to form a toner dispersion liquid, and the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being from about 2 ppm to about 50 ppm when 0.5 g of the toner is dispersed in 2 g of N,N-dimethylformamide to form a toner dispersion liquid.

Toner for developing electrostatic charge image, developer for developing an electrostatic charge image, toner cartridge, process cartridge, and image forming apparatus

A toner for electrostatic charge image development, the toner includes a binder resin, the binder resin includes an amorphous polyester resin having alkenyl groups and a crystalline polyester resin, about 5% or more of the alkenyl groups have a branched structure, and the o crystalline polyester resin has an ester concentration (M) obtained by the following Equation of from about 0.04 to about 0.08:&#x2003;&#x2003;Equation

Toner for electrostatic charge image development, electrostatic charge image developer, toner cartridge, process cartridge and image forming device

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

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

An electrostatic latent image developing toner including, as a binder resin, a crystalline resin and at least one kind of non-crystalline resin, wherein, in a dynamic viscoelasticity measurement by a sine wave vibration method, a minimum value of the relaxation elasticity H in a relaxation spectrum obtained from frequency dispersion characteristics measured at temperatures of 60 and 80 degrees centigrade with a measurement frequency set in the range of 0.1 to 100 rad/sec and measurement strain set in the range of 0.02 to 4.5% is in the range of 10 to 900 Pa/cm, and a relaxation time &#x3bb; corresponding to the minimum value is in the range of 1 to 10,000 sec.

Electrostatic latent image developing toner and manufacturing method thereof

An electrophotographic image forming method includes a charging step, an exposure step, a developing step and a transfer step in the rotation of an electrostatic latent image bearing member, in which a process speed of the electrostatic latent image bearing member is 200 to 500 mm/sec, an outer diameter of the electrostatic latent image bearing member is 15 to 35 mm, an outer diameter of a developer bearing member is 10 to 25 mm, and a magnetic single component developer of which the residual magnetization in a measured magnetic field of 796 kA/m is 0.5 to 5.0 Am /kg is used as the developer. The electrophotographic image forming method can provide a good image quality without causing scattering of toner in downsizing, weight reduction of an electrophotographic apparatus and speed-up of an electrophotographic process.

Electrophotographic image forming method, electrophotographic image forming apparatus and electrophotographic image forming process unit

An electrostatic latent image developer including a toner, which is formed from an outer additive and non-magnetic resin particles containing a binder resin and a coloring agent, and a carrier, in which a resin coating layer in which electroconductive fine powder is dispersed in a matrix resin is formed on a core, wherein a volume specific resistivity of said carrier is greater than or equal to 10.sup.9 .OMEGA..multidot.cm at an electric field strength of 3000 V/cm and is less than or equal to 10.sup.13 .OMEGA..multidot.cm at an electric field strength of 10000 V/cm, said outer additive contains titanium oxide whose volume specific resistivity of a compression-molded molded product is greater than or equal to 10.sup.6 .OMEGA..multidot.cm at an electric field strength of 3000 V/cm and is less than or equal to 10.sup.10 .OMEGA..multidot.cm at an electric field strength of 10000 V/cm, and a volume specific resistivity of said electrostatic latent image developer when a toner concentration is greater than or equal to 2% is greater than or equal to 10.sup.11 .OMEGA..multidot.cm at an electric field strength of 3000 V/cm. Further, the present invention provides an image forming method including steps of forming a latent image on a latent image holding member, and developing the latent image by using said electrostatic latent image developer.

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Kanagawa, Japan

Shinpei Takagi