Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Sakon Takahashi

Yutaka Saito

Moegi Iguchi

Soutaro Kakehi

Kunihiko Sato

Yuka Yamagishi

Chiaki Suzuki

Kazuhiko Arai

Yutaka Kiuchi

Masayo Higashimura

Mona Tasaki

Satoshi Inoue

Masahiro Takagi

Tomohito Nakajima

Atsumi Kurita

Atsuhiko Eguchi

Yasuaki Hashimoto

Michio Take

Kozo Ota

Masaaki Takahashi

Yosuke Tsurumi

Yuka Zenitani

Katsuyuki Kitajima

Kosuke Yamada

Fusako Kiyono

Satoshi Kamiwaki

Nobumasa Furuya

Norihito Fukushima

Takuro Watanabe

Motoko Sakai

Tsutomu Furuta

Akira Matsumoto

Toshiaki Hasegawa

Koji Nishimura

Shunsuke Nozaki

Tsuyoshi Murakami

Noriyuki Mizutani

Hiroshi Kamada

Takeshi Shoji

Akihiro Iizuka

Daisuke Haruyama

Shinpei Takagi

Haruhide Ishida

Rieko Kataoka

Takeshi Tanabe

Hiroaki Saijo

Masaaki Usami

Yuta Saeki

Yasuko Torii

Atsushi Sugawara

Yasuo Kadokura

Susumu Yoshino

Sakae Takeuchi

Yoshifumi Iida

Hiroyoshi Okuno

Takayuki Yamashita

Yoko Miyamoto

Koji Sasaki

Hiroshi Nakazawa

Hideaki Yoshikawa

Yukiaki Nakamura

Satoshi Miura

Manabu Serizawa

Daisuke Ishizuka

Ikutaroh Nagatsuka

Toshiyuki Yano

Masahiro Uchida

Kana Yoshida

Seijiro Ishimaru

Yasuhiro Oya

Daisuke Nakai

Kaori Ohishi

Shinichiro Kawashima

Hiroyuki Fukuda

Yoshiya Mashimo

Karin Sakai

Shinichi Kawamata

Eiji Iwasaki

An electrostatic image developer includes a toner containing toner particles, a carrier, and an external additive containing titanium dioxide particles of two types having different refractive indexes, fatty acid metal salt particles, and an abrasive.

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

A toner for electrostatic image development includes: toner particles; Si-doped strontium titanate particles; and silica particles. The particle diameter D of at least one peak in a number-based particle size distribution of primary particles of the silica particles is larger than the number-based median diameter Dof primary particles of the Si-doped strontium titanate particles.

Toner for electrostatic image development, electrostatic image developer, and toner cartridge

An electrostatic-image developing toner includes toner particles, inorganic particles externally added to the toner particles, and a low-molecular-weight siloxane having a molecular weight of 200 or more and 600 or less. The low-molecular-weight siloxane includes only a siloxane bond and an alkyl group. The total content of the low-molecular-weight siloxane in the electrostatic-image developing toner is, by mass, 0.01 ppm or more and 5 ppm or less.

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

Provided is an electrostatic charge image developing toner including: toner particles; and strontium titanate particles A and strontium titanate particles B having different average primary particle diameters from each other. The strontium titanate particles B have an average primary particle diameter Db of 10 nm to 100 nm. An average primary particle diameter Da of the strontium titanate particles A and the average primary particle diameter Db of the strontium titanate particles B satisfy a relationship of 10&#x2264;Da/Db&#x2264;100.

Electrostatic charge image developing toner and electrostatic charge image developer

An electrostatic charge image developing toner includes: a toner particle having average circularity of 0.91 or more and 0.98 or less, a silica particle externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has average primary particle circularity of 0.82 or more and 0.94 or less, and circularity that becomes 84% of accumulation of the primary particle of more than 0.92.

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

An electrostatic charge image developing toner includes: a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more and 20 atom % or less; and a strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more and 100 nm or less.

An electrostatic charge image developing toner includes a toner particle, a lubricant particle that is externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has an average primary particle circularity of 0.82 or more and 0.94 or less, and that has a primary particle circularity that becomes 84% of accumulation of more than 0.92.

An electrostatic charge image developing toner includes: a toner particle and a strontium titanate particle that is externally added to the toner particle, in which an average primary particle diameter of the strontium titanate particle that is present on a surface of the toner particle is 30 nm or more and 100 nm or less, and average primary particle circularity is 0.82 or more and 0.94 or less, and in which circularity that becomes 84% of accumulation of the primary particle is greater than 0.92.

An electrostatic charge image developing toner includes a toner particle; a strontium titanate particle that is externally added to the toner particle and that is doped with a metal element having an electronegativity of 1.3 or less; and a silica particle that is externally added to the toner particle, in which in a case where a detected peak intensity of a metal element having an electronegativity of 1.3 or less is Me-R, a detected peak intensity of strontium is Sr&#x2014;R, a detected peak intensity of silicon is Si&#x2014;R, and an element proportion of strontium is Sr&#x2014;P, Conditions (1) to (3) are satisfied,0.08 kcps&#x2264;Me-R&#x2264;10 kcps,&#x2003;&#x2003;(1)0.1%&#x2264;Sr&#x2014;P&#x2264;3.0%, and&#x2003;&#x2003;(2)0.15&#x2264;Sr&#x2014;R/Si&#x2014;R&#x2264;12.&#x2003;&#x2003;(3)

An electrostatic charge image developing toner includes toner particles, silica particles having an average particle diameter of 80 nm to 200 nm, lubricant particles N which has negatively chargeable property, and lubricant particles P which has positively chargeable property, wherein a content (s) of the silica particles, a content (n) of the lubricant particles N, and a content (p) of the lubricant particles P satisfy relationships of Expression (1): 0.002&#x2264;p/s&#x2264;0.2; and Expression (2): 0.02&#x2264;n/s&#x2264;0.5.

An electrostatic charge image developing toner includes: toner particles; first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%; and second silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%, wherein, when an average primary particle diameter of the first silica particles is set as Da (nm) and an average primary particle diameter of the second silica particles is set as Db (nm), relationships of the following Expressions (A1) to (A3) are satisfied: Expression (A1): 80&#x2266;Da&#x2266;120, Expression (A2): 120&#x2266;Db&#x2266;200, and Expression (A3): 10&#x2266;Db&#x2212;Da&#x2266;120.

There is provided an electrostatic image-developing toner containing a binder resin, a coloring agent and a release agent having a melting temperature of 85&#xb0; C. to 120&#xb0; C., the toner having a sea-island structure involving a sea part containing the binder resin and an island part containing the release agent, wherein a mode value of the distribution of the eccentricity degree B of the release agent-containing island part, represented by the specific formula, is from 0.75 to 1.00 and a skewness of the distribution of the eccentricity degree B is from &#x2212;1.30 to &#x2212;0.50.

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

A carrier set for electrostatic charge image developer, includes: a first carrier that satisfies Expression (1); 160 mJ&#x2266;x&#x2266;200 mJ, and a second carrier that satisfies Expression (2); 210 mJ&#x2266;y&#x2266;250 mJ, wherein x is a total energy amount, which is measured by a powder rheometer, of a developer which is prepared by mixing the first carrier and a toner for measurement such that a weight ratio of the toner is 8% by weight based on the developer, and y is a total energy amount, which is measured by the powder rheometer, of a developer which is prepared by mixing the second carrier and the toner for measurement such that a weight ratio of the toner is 8% by weight based on the developer.

Carrier set for electrostatic charge image developer, electrostatic charge image developer set, and process cartridge

There is provided an electrostatic-image-developing toner containing: a toner particle which contains a binder resin containing a polyester resin, a release agent, and a styrene (meth)acrylic resin and in which the styrene (meth)acrylic resin forms a domain having a number average diameter of 300 nm to 800 nm in the toner particle; and an inorganic particle in which the number average diameter of the domain is from 1.5 times to 10 times the number average particle diameter of the inorganic particle.

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

An image forming apparatus includes an image forming unit and a controller. The image forming unit forms an image on a continuous recording medium by transferring to the continuous recording medium a toner image obtained by developing a latent image formed on a photoreceptor. The controller controls the image forming unit such that an image based on image information is formed in a specific image area on the continuous recording medium, and at the same time, a specific image pattern is formed in a specific side area outside the image area on the continuous recording medium.

Image forming apparatus, image forming method, and computer readable medium having image density adjustment control

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Kanagawa, Japan

Sakon Takahashi