Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Mona Tasaki

Yutaka Saito

Yuka Yamagishi

Fusako Kiyono

Sakon Takahashi

Moegi Iguchi

Soutaro Kakehi

Hiroki Omori

Teppei Yawada

Masashi Ikeda

Tatsuhiro Igarashi

Masahiro Uchida

Manabu Furuki

Shuji Sato

Shintaro Anno

Toshiaki Hasegawa

Tsuyoshi Murakami

Satoshi Kamiwaki

Akihiro Iizuka

Motoko Sakai

Keita Yamamoto

Yoshinari Ueno

Tsutomu Furuta

Hiroki Ohmori

Emi Matsushita

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 a toner particle, a polishing agent particle, and a fatty acid metal salt particle, wherein a rate of the fatty acid metal salt particles strongly attached to the surface of the toner particles is equal to or greater than 50% by number with respect to the fatty acid metal salt particles attached to the surface of the toner particles.

An electrostatic charge image developing toner includes toner particles containing a binder resin and a release agent; and an external additive containing fatty acid metal salt particles, wherein a non-attachment rate representing a percentage of the fatty acid metal salt particles not attached to the toner particles before ultrasonic desorption treatment is 45% or less and a weak attachment rate representing a percentage determined by subtracting the non-attachment rate from a percent of the fatty acid metal salt particles not attached to the toner particles after ultrasonic desorption treatment is 55% or more.

An electrostatic charge image developing toner includes toner particles containing a binder resin and a release agent and an external additive containing fatty acid metal salt particles and abrasive particles, wherein a ratio (B/A) of an isolation amount B of the abrasive particles isolated from the toner particles after an ultrasonic isolation treatment to an isolation amount A of the fatty acid metal salt particles isolated from the toner particles after the ultrasonic isolation treatment is from 0.3 to 2.0.

An electrostatic-image developing toner contains toner particles and particles of a metallic salt of a fatty acid deposited on the toner particles. The particles of the metallic salt of the fatty acid contain 0.0008% to 0.01% by mass of iron.

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

An electrostatic charge image developing toner includes toner particles, polishing agent particles which have a number particle size distribution having two peaks, and fatty acid metal salt particles which have a number particle size distribution having one peak, wherein the toner satisfies relationships expressed by expressions: (1) Da&#x2266;0.5&#xd7;Dt, (2) Dc&#x2266;0.5&#xd7;Dt and (3) Dt&#x2266;Db, wherein Da represents a particle diameter of a small-diameter-side peak in the two peaks of the number particle size distribution of the polishing agent particles, Db represents a particle diameter of a large-diameter-side peak in the two peaks of the number particle size distribution of the polishing agent particles, Dc represents a particle diameter of a peak of the number particle size distribution of the fatty acid metal salt particles, and Dt represents a volume average particle diameter of the toner particles.

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

An electrostatic-image developing toner contains toner particles and particles of a metallic salt of a fatty acid deposited on the toner particles. The particles of the metallic salt of the fatty acid contain 0.0035% to 0.07% by mass of sulfur element.

A cleaning device includes a removal member that removes residual objects from a surface of a target cleaning body by contacting with the surface in a linear manner and rubbing against the surface and forms a piled body which is constructed of a portion of the residual objects at a contact location, and a pressure device that presses the piled body to increase a strength of the piled body.

Cleaning device and image forming apparatus

A cleaning device includes a removal member that forms piled bodies of residual objects at a contact location and removes residual objects from a surface of a target cleaning member by contacting with the surface in a linear manner and rubbing against the surface, and a smoothing member that smooths out the piled bodies by moving along the contact location.

A brilliant toner includes flake shape toner particles containing a binder resin and a flake shape metallic pigment. The brilliant toner further includes tabular particles containing a Ti element.

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Kanagawa, Japan

Mona Tasaki