Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Tsutomu Furuta

Yutaka Saito

Sakon Takahashi

Tsuyoshi Murakami

Daisuke Ishizuka

Satoshi Kamiwaki

Yasuaki Hashimoto

Yuka Yamagishi

Akira Matsumoto

Atsushi Sugawara

Daisuke Tomita

Koji Sasaki

Masaru Takahashi

Yukiaki Nakamura

Satoshi Miura

Tomohito Nakajima

Moegi Iguchi

Mona Tasaki

Kana Yoshida

Soutaro Kakehi

Erina Saito

An electrostatic charge image developing toner contains toner particles that contain a binder resin and resin particles and an external additive that contains inorganic particles, in which a loss coefficient tan δof the resin particles at 40° C. and 0.1 rad/s satisfies 0.1<tan δ<1.0, a loss coefficient tan δof the resin particles at 40° C. and 10 rad/s satisfies 1.3<tan δ<3.0, and in a case where a strain of 0.005% is applied to the toner at 40° C., a stress relaxation time τ of the toner satisfies 5 seconds<τ<500 seconds.

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

A method of producing resin particles includes a first step of adding a monomer-containing emulsified liquid that contains a polymerizable monomer and an aqueous medium to an aqueous mother medium to polymerize the polymerizable monomer; and a second step of adding an aqueous medium for cooling to the aqueous mother medium after completion of the addition of the monomer-containing emulsified liquid to the aqueous mother medium.

Method of producing resin particles and method of producing electrostatic charge image developing toner

A toner for electrostatic image development includes: a binder resin; and a coloring agent. When an image with a toner mass per unit area of 4.0 g/mis formed using the toner, the image has a color that satisfies the following conditions (A), (B), and (C):

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

A white toner for electrostatic image development includes white toner particles containing a binder resin and a white pigment. When in a circularity distribution of the white pigment determined by sectional observation of the white toner particles, the cumulative 10% circularity from the smaller side is C10, and the cumulative 50% circularity is C50, the following formula (1) and formula (2) are satisfied.0.900&#x2264;50&#x2264;1.000&#x2003;&#x2003;Formula (1):1.00&#x2264;50/10&#x2264;1.13&#x2003;&#x2003;Formula (2):

White toner for electrostatic image development, electrostatic image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

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.

Electrostatic charge image developing toner and electrostatic charge image developer

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

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

Growing community of inventors

Kanagawa, Japan

Tsutomu Furuta