Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Yukiaki Nakamura

Akira Matsumoto

Masaru Takahashi

Yasuo Kadokura

Yusuke Ikeda

Atsushi Sugawara

Satoshi Kamiwaki

Masanobu Ninomiya

Satoshi Miura

Ryutaro Kembo

Tomoaki Tanaka

Shinya Nakashima

Tsuyoshi Murakami

Noriyuki Mizutani

Satomi Hara

Takahiro Yamashita

Daisuke Tomita

Koji Sasaki

Kana Yoshida

Tetsuya Taguchi

Susumu Yoshino

Yoshimasa Fujihara

Sakiko Takeuchi

Takahisa Tatekawa

Masato Ono

Daisuke Noguchi

Yutaka Saito

Kazuhiko Nakamura

Sakon Takahashi

Masayuki Seko

Yasuaki Hashimoto

Asafumi Fujita

Kiyohiro Yamanaka

Sakiko Hirai

Shotaro Takahashi

Tsutomu Furuta

Kana Nagashima

Kohei Manabe

A method for producing a toner for developing electrostatic charge images includes: preparing a first dispersion containing, dispersed therein, first aggregated particles containing a binder resin; preparing a second dispersion containing second aggregated particles dispersed therein, the second aggregated particles being prepared by attaching resin particles to surfaces of the first aggregated particles in the first dispersion; heating the second dispersion to a fusion temperature at which the second aggregated particles in the second dispersion are fused to each other; and holding the second dispersion at the fusion temperature. 20 mass % or more of a weak acid relative to the mass of the second aggregated particles is added to the second dispersion during the heating of the second dispersion or the holding of the second dispersion, or during the heating of the second dispersion and the holding of the second dispersion.

Method for producing toner for developing electrostatic charge images, toner for developing electrostatic charge images, and electrostatic charge image developer

A method for producing an electrostatic charge image developing toner includes forming aggregated particles by aggregating at least resin particles in a dispersion liquid containing the resin particles, and fusing/coalescing the aggregated particles by heating an aggregated particle dispersion liquid containing a base having volatility and the aggregated particles dispersed therein in a fusion/coalescence tank which houses the aggregated particle dispersion liquid.

Method for producing electrostatic charge image developing toner

A toner for developing an electrostatic charge image includes toner particles that include a binder resin, a releasing agent, a brilliant pigment, and an aminocarboxylic acid compound.

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

An electrostatic charge image developing toner includes a toner particle that contains a pyrazolotriazole-based dye and a zirconium oxide particle.

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 silicon phthalocyanine dye and a zirconium oxide particle.

An electrostatic charge image developing toner includes a toner particle, and the toner particle includes: a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more; and a shell layer that includes at least two resin layers each containing an amorphous resin and covers a surface of the core particles, and an outermost layer of the at least two resin layers is a resin layer being made of the amorphous resin.

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

An electrostatic image developing toner set includes a brilliant toner having brilliant toner particles that include a binder resin and a brilliant pigment, and a color toner having color toner particles that include a binder resin and a colorant other than the brilliant pigment. The binder resin included in the brilliant toner particles and the binder resin included in the color toner particles are incompatible with each other.

Electrostatic image developing toner set and electrostatic image developer set

A resin particle includes a fluorescent colorant and a binder resin. The fluorescent colorant is bound to the binder resin by a chemical bond.

Resin particle

A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 μm or more and 1 μm or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.

Resin fine particle, thermoplastic resin particle, and method for producing resin fine particle

A resin fine particle includes a polyester resin; and a basic dye, in which a volume average particle diameter of the resin fine particle is 0.05 μm or more and 1 μm or less, and a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle is 0.8 or more.

A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A−30 (nm) to A+30 (nm) is 2,500 or more.

A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.

A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a flat toner containing a flat pigment, the developer being accommodated in the developing device; and a transfer device including an intermediate transfer belt onto which the toner image formed on the surface of the image carrier is primarily transferred, a primary transfer device configured to primarily transfer the toner image formed on the surface of the image carrier to a surface of the intermediate transfer belt, and a secondary transfer device configured to secondarily transfer the toner image on the surface of the intermediate transfer belt to a surface of a recording medium, wherein the intermediate transfer belt contains a resin and conductive carbon particles, and after the flat toner adheres to an outer circumferential surface of the intermediate transfer belt in a loading amount of 3 g/cm, in a case where air is blown to the outer circumferential surface from an upper side of the outer circumferential surface while increasing a blowing pressure, all the flat toner adhering to the outer circumferential surface is separated from the outer circumferential surface at a blowing pressure of 25 kPa or less.

Unit and image forming apparatus having a certain adhesive force property

A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as Pand P, respectively, and full widths at half maximum of the first toner and the second toner are taken as Wand W, respectively, |P&#x2212;P| is 3 mm or less, and |W&#x2212;W| is 3 mm or less.

Growing community of inventors

Kanagawa, Japan

Yukiaki Nakamura