Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Shintaro Anno

Satoshi Miura

Daisuke Noguchi

Yoshimasa Fujihara

Atsushi Sugawara

Fusako Kiyono

Takuro Watanabe

Yosuke Tsurumi

Yasuaki Hashimoto

Eiji Kawakami

Emi Matsushita

Shuji Sato

Yoshifumi Iida

Yasuo Kadokura

Masahiro Takagi

Norihito Fukushima

Kazutsuna Sasaki

Hiroaki Saijo

Jumpei Iwasaki

Satoshi Yoshida

Hirokazu Hamano

Toshiaki Hasegawa

Eisuke Iwazaki

Motoko Sakai

Takeshi Tanabe

Hiroki Ohmori

Hiroki Omori

Satoshi Inoue

Yutaka Saito

Masaru Takahashi

Toshiyuki Yano

Moegi Iguchi

Michio Take

Akihiro Iizuka

Masaki Nakamura

Mona Tasaki

Takahiro Yamashita

Keita Yamamoto

An electrostatic image developing toner includes a toner particle including a binder resin and a release agent. When a cross section of the toner particle is observed, the toner particle satisfies a condition (A1) below: Condition (A1): the toner particle includes one or more domains of the release agent, the one or more domains having a diameter equal to 8% or more and 30% or less of the maximum diameter of the toner particle, the one or more domains having a geometric center at a depth of R/2 or less below the surface of the toner particle, where R represents the distance between the geometric center of the toner particle and the surface of the toner particle, the one or more domains being entirely included in an inside portion of the toner particle which extends below a depth of 50 nm from the surface of the toner particle.

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

An electrostatic image developing toner includes a toner particle including an amorphous resin, a crystalline resin, and a release agent. When a cross section of the toner particle is observed, the toner particle satisfies conditions (A1) and (B1) below: Condition (A1): one or more domains of the crystalline resin, the domains having a diameter equal to 10% or more and 40% or less of the maximum diameter of the toner particle, are present in the toner particle, and Condition (B1): one or more domains of the release agent, the domains having a diameter equal to 10% or more and 40% or less of the maximum diameter of the toner particle, are present in the toner particle.

An electrostatic image developing toner includes a toner particle including a binder resin and a colorant. The net intensity Nof sulfur included in the toner particle and the total net intensity Nof an alkali metal and an alkaline-earth metal included in the toner particle, which are measured by X-ray fluorescence analysis, satisfy 1.0<N/N<22.0.

Electrostatic image developing toner and electrostatic image developer

An electrostatic charge image developing toner includes a toner particle that contains a binder resin having an acid value of 5 mgKOH/g or more and 25 mgKOH/g or less, and a pigment having an isoindoline skeleton, in which a total Net intensity Nof an alkali metal and an alkaline earth metal, which is measured by fluorescent X-ray analysis, in the toner particle is 1.50 kcps or more and 4.00 kcps or less.

Electrostatic charge image developing toner and electrostatic charge image developer

A method for producing a recycled carrier includes: performing classification, the classification including separating a carrier having a coating layer from a collected developer by a centrifugal air classifier, the collected developer containing the carrier and being obtained by collecting an electrostatic charge image developer remaining after image formation; and performing recoating, the recoating including dissolving or thermally melting a coating resin of the separated and classified carrier and then coating the resulting carrier again to produce a recycled carrier.

Method for producing recycled carrier, method for producing recycled electrostatic charge image developer, image forming method, and recycled carrier

An electrostatic charge image developing toner includes: a toner particle containing a binder resin; and an external additive including a silica particle having a circularity of more than 0.5 and 0.9 or less and a volume average particle diameter of more than 100 nm and 300 nm or less, in which a total Net intensity Nof an alkali metal element and an alkaline earth metal element in the toner particle measured by fluorescence X-ray analysis is 0.10 kcps or more and 1.20 kcps or less.

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

A method for producing a carrier for electrostatic charge image development includes coating magnetic particles by adding the magnetic particles and a coating liquid containing a resin and a solvent to a mixer with a stirring blade to form a resin coating layer on surfaces of the magnetic particles and taking a carrier having the resin coating layer out of the mixer. In the coating, the stirring conditions after the solvent is evaporated and dried by heating in the mixer until the carrier is taken out of the mixer satisfy Formula 1 below and Formula 2 below:0.2≤peripheral speed πDn (m/s) of stirring blade≤2.0  Formula 1,1×10≤stirring workload (peripheral speed×stirring time T)≤4×10  Formula 2,

Method for producing carrier for electrostatic charge image development, method for producing electrostatic charge image developer, image forming method, and carrier for electrostatic charge image development

An electrostatic charge image developing toner includes: a toner particle containing a binder resin; and an external additive containing alumina particles having a volume average particle diameter of more than 5 nm and 80 nm or less and silica particles having a volume average particle diameter of 10 nm or more and 90 nm or less, and in the toner particle, a Net intensity Nof a total of an alkali metal element and an alkaline earth metal element, measured by fluorescence X-ray analysis, is 0.10 kcps or more and 1.30 kcps or less, and a ratio (Ws/Wa) of a content Ws of the silica particles to a content Wa of the alumina particles is more than 0.5 and less than 35.

An electrostatic image developing toner includes an amorphous polyester resin and a crystalline polyester resin, wherein a Net intensity Nof a Na element and a Net intensity Nof a Cl element, the Net intensities Nand Nbeing determined by X-ray fluorescence analysis, satisfy 2.5&#x2264;N/N&#x2264;260.0.

A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that in an x-ray fluorescence analysis of the toner, the net intensity of the peak for the Mg element is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of at least one compound represented by formula (1),MTiO&#x2003;&#x2003;(1)where M represents at least one selected from the group consisting of Ca, Sr, and Ba.

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

An electrostatic charge image developing carrier includes: magnetic particles; and a resin layer coating the magnetic particles and containing inorganic particles, in which an average particle diameter of the inorganic particles is 5 nm or more and 90 nm or less, an average thickness of the resin layer is 0.6 &#x3bc;m or more and 1.4 &#x3bc;m or less, and a ratio B/A of a surface area B of the electrostatic charge image developing carrier to a plan view area A of the electrostatic charge image developing carrier is 1.020 or more and 1.100 or less when a surface of the electrostatic charge image developing carrier is three-dimensionally analyzed.

Electrostatic charge image developing carrier, electrostatic charge image developer, and image forming apparatus

An electrostatic image developing toner includes an amorphous polyester resin, a crystalline polyester resin, and C.I. Pigment Red 57:1, wherein a Net intensity Nof an Mg element, the Net intensity Nof being determined by X-ray fluorescence analysis, is 0.10 kcps or more and 0.40 kcps or less.

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

A toner for electrostatic image development contains toner particles containing a binder resin. The binder resin includes an amorphous resin and a crystalline resin. In the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.40 to 1.20 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.

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

A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and external additives including particles of at least one compound represented by formula (1) and particles of a metal salt of a fatty acid,MTiO&#x2003;&#x2003;(1)where M represents at least one selected from the group consisting of Ca, Sr, and Ba.

A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of a metal salt of a fatty acid.

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Kanagawa, Japan

Shintaro Anno