Fuji Xerox Co., Ltd.

Masaaki Suwabe

Yasuo Matsumura

Yasuo Kadokura

Shuji Sato

Manabu Serizawa

Takao Ishiyama

Hideo Maehata

Takeshi Shoji

Hisao Morijiri

Hisae Yoshizawa

Hiroshi Kamada

Masakazu Iijima

Kazuya Hongo

Michio Take

Hiroshi Takano

Takahiro Mizuguchi

Kazuaki Aoki

Koichi Yasaku

Wataru Nakabayashi

Katsumi Nukada

Katsumi Daimon

Hiroshi Nakazawa

Kiyoshi Hashimoto

Kazuhiko Yanagida

Nobuyuki Ichizawa

Norihito Fukushima

Hiroshi Miyamoto

Fumio Ojima

Tsutomu Kubo

Kazufumi Tomita

Noriyoshi Takahashi

Hitoshi Takimoto

Junichi Tomonaga

Yukihiro Ishii

Satoru Inakage

Hisae Ishikawa

Yoshimasa Fujiwara

Naohiko Tsuyuki

Takahiro Mizukuchi

Takeshi Shouji

Kouichi Sugiyama

Takahiro Mizoguchi

Makiko Nakano

A method of producing an electrostatic latent image developing toner that includes the steps of producing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that includes a polymerizable monomer having a vinyl-based double bond, and washing the resin particle dispersion through contact with an organic solvent, wherein the washed resin particle dispersion, a colorant particle dispersion produced by dispersing a colorant, and a release agent particle dispersion produced by dispersing a release agent are mixed together, and following formation of aggregate particles by aggregation of the resin particles, the colorant particles and the release agent particles, heating is conducted to fuse the aggregate particles and produce the electrostatic latent image developing toner.

Electrostatic latent image developing toner, method of producing electrostatic latent image developing toner, and electrostatic latent image developer

An electrostatic image developing toner includes toner particles that contain a binding resin, a coloring agent and a release agent and that have D50 of from about 2.0 &#x3bc;m to about 8.0 &#x3bc;m, D50 standing for a volume-average particle size of the toner particles; and non-colored release agent particles, wherein out of the non-colored release agent particles, those ranging in volume-average particle size of from about 0.8 to about 1.2 times a value of D50 are present in a proportion of about 50 or below per 5,000 of the toner particles.

Electrostatic-image-developing toner, electrostatic image developer, method of manufacturing electrostatic-image-developing toner, toner cartridge, process cartridge, method of image formation, and image forming apparatus

A method of producing an electrostatic latent image developing toner includes: preparing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that comprises a polymerizable monomer comprising a vinyl-based double bond; extracting a liquid from the resin particle dispersion by heating; mixing the distilled resin particle dispersion with a colorant particle dispersion prepared by dispersing a colorant; and aggregating the resin particles, the pigment particles and a release agent particles to form aggregate particles, and then conducting heating to fuse the aggregate particles.

Method of producing electrostatic latent image developing toner

An electrostatic latent image toner in which the quantity within the toner of alkyl carboxylate esters formed from a carboxylic acid containing from approximately 3 to 5 carbon atoms and an alkyl group containing from approximately 3 to 5 carbon atoms is no more than approximately 4 ppm.

Electrostatic latent image toner, and manufacture thereof, and electrostatic image developer, and image forming method

The invention provides a toner for developing electrostatic latent images containing at least a binder resin, a colorant, a releasing agent, and a graft polymer that has been made by graft polymerization of a resin matrix and a macromonomer including at least one group selected from the group consisting of a hydroxyl group, a hydroxyalkyl group, and a pyrolidonyl group, and a production method thereof. The invention further provides an electrostatic latent image developer using the toner, an image forming method using the toner, and an image forming apparatus.

Toner for developing electrostatic latent image and production method thereof, electrostatic latent 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

The present invention provides a tandem-type image forming method using a trickle developing system, wherein the average circularity of a toner contained in at least a supplementary developer used for appropriately supplying a developer to a developing device is in the range of 0.940 to 0.980. In the toner, the ratio of the number of particles having an average circularity of 0.970 or greater, in a particle diameter range of a toner circle-equivalent diameter&#xd7;3/5 or less, is 5% or less, and the ratio of the number of particles having an average circularity of 0.950 or less, in a particle diameter range of a toner circle-equivalent diameter&#xd7;7/5 or greater, is 10% or less.

Image forming method, image forming apparatus and toner cartridge

A toner for developing an electrostatic image, a process for producing the same, a developer for developing an electrostatic image and a process for forming an image are disclosed. The toner contains a resin, a colorant and a releasing agent, in which the toner has protrusions having a height of about from 0.05 to 2 &#x3bc;m, a part of the protrusions encompasses the releasing agent, and a proportion of elements derived from the releasing agent is about 10% by atom or less based on elements on a surface of the toner that is quantitatively determined by X-ray photoelectron spectroscopy.

Toner for developing electrostatic image, process for producing toner for developing electrostatic image, developer for developing electrostatic image, and process for forming image

The present invention provides an image forming process including the steps of: forming a latent image; developing the latent image with a toner to form a toner image; transferring the toner image onto a receiving body; and fixing the toner image to the receiving body, wherein the step of fixing is carried out using a fixing device including a heat-fixing roller, an endless belt, and a pressure member to allow the endless belt to travel around the heat-fixing roller at a given angle such that a nip is produced through which a recording sheet passes, with the pressure member being pressed to distort the heat-resistant elastic layer in the heat-fixing roller, and wherein the toner for developing the electrostatic latent image satisfies predetermined requirements.

Image forming process

Provided are a toner and its production, a developer, an image forming method and an image forming apparatus. The toner has excellent fixation characteristics of good releasability, hot offset resistance, folding resistance, surface glossiness, and OHP transparency. The toner contains a binder resin, a colorant, a release agent and an inorganic particles. The inorganic particles therein contain inorganic particles (A) having the mean primary particle size not less than approximately 5 nm and less than approximately 30 nm and inorganic particles (B) having the mean primary particle size not less than approximately 30 nm and less than approximately 200 nm.

Toner for developing electrostatic image, method for producing the same, electrostatic image developer, method for forming image and image forming apparatus

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

A toner for developing an electrostatic image, a developer for developing an electrostatic image, a process for producing them, and a process for forming an image that provide excellent developing and transferring performance and also provide excellent performance stability, as well as high image quality and reliability are provided. The problem can be solved by a toner for developing an electrostatic image having a particle size distribution index on a small particle side GSDpS in number distribution of a particle diameter of about 1.27 or less, GSDpS is D50p/D16p, D50p represents a particle diameter providing, a particle diameter accumulation in number distribution of 50%, and D16p represents a particle diameter providing a particle diameter accumulation in number distribution of 16% from a small diameter side.

TONER FOR DEVELOPING ELECTROSTATIC IMAGE, PROCESS FOR PRODUCING THE SAME, FINE RESIN PARTICLE DISPERSION, RELEASING AGENT DISPERSION, DEVELOPER FOR DEVELOPING ELECTROSTATIC IMAGE, AND PROCESS FOR FORMING IMAGE

The foregoing problem is solved with a toner for the development of an electrostatic image obtained by externally adding agglomerated particles to toner particles containing a binder resin and a colorant, characterized in that the agglomerated particles are made of (i) a particulate resin alone, (ii) a particulate lubricant alone or (iii) at least two particulate materials selected from the group consisting of particulate resin, particulate lubricant and inorganic particulate material and have a shape factor of 130 or more and a volume-average particle diameter of from 0.5 &mgr;m to 10 &mgr;m.

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

A process for producing an electrophotographic photoreceptor including a step of coating a light-sensitive layer on an electroconductive base, a step of removing part or all of oxidants present from an air atmosphere by an oxidants removing unit, a step of dealing with a coating solution for forming the light-sensitive layer in the air atmosphere from which concentration of oxidants is suppressed by the step of removing part or all of oxidants present, and a step of suppressing variation in the concentration of oxidants in the air atmosphere, wherein the step of dealing with the coating solution for the light-sensitive layer includes at least one of the steps of preparing the coating solution for forming the light-sensitive layer, applying the light-sensitive layer and drying an applied coating.

Process for producing an electrophotographic photoreceptor and the electrophotographic produced by that process

Disclosed is an electrostatic image developing toner comprising a binder resin and a coloring agent, which exhibits a volume-average particle distribution GSDv of not more than 1.26 and an acid value of from 1.0 to 20 mgKOH/g and contains a surface active agent in an amount of not more than 3% by weight in the particulate toner and an inorganic metal salt having an electric charge having a valence of two or more in an amount of from not less than 10 ppm to not more than 1% by weight.

Growing community of inventors

Minami-ashigara, Japan

Masaaki Suwabe