Canon Kabushiki Kaisha

Kazuhisa Shirayama

Takashi Matsui

Takeshi Hashimoto

Hayato Ida

Kentaro Kamae

Kimihiro Yoshimura

Yohei Miyauchi

Yuya Chimoto

Kaoru Okamoto

Ryosuke Tsuruga

Hisasuke Kajihara

Maho Hori

Junichi Tamura

Koji Sato

Akeshi Asaka

Masayuki Hama

Hiroto Sugimoto

Takeshi Ohtsu

Atsushi Hori

Akira Okano

Toshimichi Ise

Keiko Yamagishi

Kouichirou Ochi

Toshiyuki Yoshida

Jun Ohira

Kazuya Kitamura

Naoto Kameyama

Takanori Ueno

Yasutomo Tsuji

Megumi Uchino

Hiroshi Tominaga

Shigeo Kuroda

Toshihiro Kikuchi

Midai Suzuki

Kiyonori Soutome

A toner having high rub resistance is provided. A toner including a toner particle containing a binder resin and a calcium carbonate particle, wherein in X-ray diffractometry of the toner particle by CuKα radiation, when the Bragg angle is defined as θ, (i) the calcium carbonate particle has peaks at 2θ of 26.5°±0.5° and 29.5°±0.5°, (ii) a crystallite diameter of crystals thereof attributed to 2θ=29.5°±0.5° is 10 nm or more and 45 nm or less, and (iii) the ratio (a/b) of a peak intensity 'a' at 2θ=26.5°±0.5° to a peak intensity “b” at 2θ=29.5°±0.5° is 0.15 or more and 0.24 or less.

Toner

To provide a toner having both low temperature fixability and hot offset resistance and having excellent scratch resistance of a fixed image. A toner including a toner particle containing a binder resin, a crystalline polyester, and a calcium carbonate particle, in which the crystalline polyester includes a unit derived from an aliphatic diol and a unit derived from an aliphatic dicarboxylic acid, an ester group concentration Ec of the crystalline polyester is 27% by mass or more to 50% by mass or less, a content Ma of the calcium carbonate particle included in the toner particle is 3% by mass or more to 40% by mass or less, and a ratio (Ma/Mc) of the content Ma of the calcium carbonate particle included in the toner particle to a content Mc (% by mass) of the crystalline polyester included in the toner particle is 0.2 or more to 20 or less.

Toner and method for producing the same

An image capture apparatus comprises an image sensor and an output interface that selectively outputs a main video stream obtained using the image sensor and a sub video stream input from outside. The image capture apparatus changes a resolution of the main video stream to be equal to a resolution of the sub video stream in a case where an output of the sub video stream from the output interface has been set to be enabled.

Image capture apparatus and control method therefor

A magnetic carrier including a magnetic carrier particle having a magnetic core particle and a coating layer of an organosilicon polymer on a surface of the magnetic core particle, wherein the organosilicon polymer has the structure given by formula (T3) below; inSi-NMR measurement of the THF-insoluble matter of the organosilicon polymer, the ratio ST3 of the peak area for the structure given by formula (T3) to the total peak area for the organosilicon polymer is at least 0.05; and in the roughness curve measured on the magnetic carrier particle, the mean width (RSm) of the roughness curve elements of the magnetic carrier particle, and the ratio (&#x3c3;/RSm) to this RSm of the standard deviation &#x3c3; of the width of the region where one period of a protrusion and a recess occurs, are in prescribed ranges.R&#x2014;Si(O)&#x2003;&#x2003;(T3) R in the formula represents a prescribed substituent.

Magnetic carrier, two-component developer, and method for producing magnetic carrier

An intermediary transfer belt having surface resistivity &#x3c1;s of 1&#xd7;10&#x3a9;/square or more and volume resistivity &#x3c1;v of 1&#xd7;10&#x3a9;&#xb7;cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.

Intermediary transfer belt, manufacturing method of the intermediary transfer belt, and image forming apparatus

Provided is a two-component developer has a toner including a toner particle including a binder resin, and a magnetic carrier, wherein the binder resin includes a polymer A having a first monomer unit derived from a first polymerizable monomer, and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer, the first polymerizable monomer is a specific (meth)acrylic acid ester, a content and an SP value of the first and second monomer units in the polymer A fall within respective specific ranges, the magnetic carrier has a magnetic core and a coating resin of the surface of the magnetic core, the coating resin includes a polymer B having monomer units (a) and (b), each SP value of the monomer units (a) and (b) is a specific value.

Two-component developer

A toner having an inorganic fine particle and a toner particle containing a binder resin, wherein the binder resin contains a polymer A having a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer that is different from the first polymerizable monomer, the first polymerizable monomer is selected from the (meth)acrylic acid esters each having a Calkyl group, the content of the first monomer unit in the polymer A is within a specific range, the SP value of the first monomer unit and the SP value of the second monomer unit are in a specific relationship to one another, the inorganic fine particle is surface treated with a compound having an alkyl group, and the volume resistivity of the inorganic fine particle is within a specific range.

Toner and two-component developer

An intermediary transfer belt includes a base layer; an elastic layer laminated on or above the base layer and formed with a silicone rubber as an elastic member; an intermediary layer laminated on or above the elastic layer; and a surface layer laminated on or above the intermediary layer. The elastic layer is 60 degrees or less in JIS-A hardness and is 5 degrees or more in JIS-E hardness. The intermediary layer is 0.1 g/m&#xb7;24 h or more and 600 g/m&#xb7;24 h or less in water vapor permeability coefficient and is 1 &#x3bc;m or more and 15 &#x3bc;m or less in average thickness.

Intermediary transfer belt and image forming apparatus

A toner has a toner particle including a binder resin, the binder resin includes a polymer A, the polymer A contains a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer, the first polymerizable monomer is selected from (meth)acrylic acid esters having an alkyl group having 18 to 36 carbon atoms, the content of the first monomer unit in the polymer A is 5.0 mol % to 60.0 mol %, the content of the second monomer unit in the polymer A is 20.0 mol % to 95.0 mol %, the SP value of the first monomer unit and the SP value of the second monomer unit satisfy a predetermined relationship, the polymer A includes a predetermined polyvalent metal, and the content of the polyvalent metal is 25 ppm to 500 ppm.

Toner and method for producing toner

There are provided an electrophotographic photosensitive member and an intermediate transfer member each having good lubricity and good cleaning property on its surface, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and an electrophotographic apparatus including the intermediate transfer member. Therefore, a surface layer of the electrophotographic photosensitive member or intermediate transfer member of the present invention contains a matrix component and a rotatably-retained spherical particle that is not bound with the matrix component and is rotatably retained in a pore in the matrix component.

Electrophotographic photosensitive member, intermediate transfer member, process cartridge, and electrophotographic apparatus

The present invention relates to an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support. The electrophotographic photosensitive member has a surface layer containing a polyarylate resin and acicular inorganic fillers. The acicular inorganic fillers are basic and have a number-average aspect ratio of 5 to 50 and a Mohs hardness of 2 to 6.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

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Abiko, Japan

Kazuhisa Shirayama