Konica Minolta, Inc.

Konica Minolta Business Technologies, Inc.

Kenshi Miyajima

Tatsuya Nagase

Kouji Sugama

Noboru Ueda

Shiro Hirano

Junya Onishi

Shinya Obara

Takaki Kawamura

Tatsuya Fujisaki

Junya Ueda

Natsuki Ito

Yohei Ohno

Hidehito Haruki

Keisuke Asano

Asao Matsushima

Naoya Tonegawa

Ikuko Sakurada

Junichi Furukawa

Kouji Sekiguchi

Kawamura Takaki

A toner for electrostatic charge image development is a toner for electrostatic charge image development including toner particles containing a binder resin and an external additive, wherein the binder resin contains a crystalline polyester resin and an amorphous polyester resin, the external additive includes Al&#x2014;Si composite oxide particles, and a Si element content of the Al&#x2014;Si composite oxide particles is in the range of 50 to 90 mass % and a Si element ratio on surfaces of the Al&#x2014;Si composite oxide particles is in the range of 3 to 35 at %.

Toner for developing electrostatic charge image

The toner for electrostatic charge development includes a toner particle including: a toner base particle containing a binder resin and a release agent; and an external additive containing titanium dioxide. The number fraction of the toner particle containing the titanium dioxide is 0.1% or more and 2.0% or less.

Toner for electrostatic charge development

Provided is a color image forming process using colorant-containing toners of multiple colors containing colorants respectively having different resistances, wherein each of the colorant-containing toners contains an amorphous resin, a crystalline polyester resin, and a mold release agent, at least the crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance contains a hybrid crystalline polyester resin formed by bonding a crystalline polyester polymerized segment and an amorphous polymerized segment, and the content of the amorphous polymerized segment in the hybrid crystalline polyester resin contained in the colorant-containing toner other than the colorant-containing toner containing a colorant having the lowest resistance is greater than the content of the amorphous polymerized segment in the crystalline polyester resin contained in the colorant-containing toner containing a colorant having the lowest resistance.

Color image forming process and color toner set

An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.

Image forming method and toner set for developing electrostatic latent image

An electrostatic image developing toner including a toner particle, wherein the toner particle contains a vinyl resin which is a polymer of a vinyl monomer having an acid group, a polyester resin, at least one of aluminum (Al) and magnesium (Mg), and tin (Sn), and when net intensities of Al, Mg and Sn in the toner particle measured by fluorescent X-ray analysis are respectively expressed as I, Iand I, a ratio (I+I)/Iis within a range of 0.5 to 2.5.

Electrostatic image developing toner

The toner of the present invention is an electrostatic latent image developing toner, and has a toner base particle. The toner base particle contains a binder resin including a crystalline resin, and a release agent. The toner has the maximum value G'at a temperature equal to or lower than Tm, among specific storage elastic modulus ratios, of 2.2 or more. The Tm represents a peak top temperature (&#xb0; C.) of a specific endothermic peak in DSC of the toner.

Toner

According to one implementation, a toner includes a toner mother particle and a convex portion on a surface of the toner mother particle. The toner mother particle includes at least a resin (1). The convex portion is formed from a resin particle including at least a resin (2). An average value of a length of a long side of the convex portion is within a range of 0.1 to 0.5 &#x3bc;m. A ratio between a Young's modulus of a non-convex portion of the toner mother particle (ER (1)) and a Young's modulus of a convex portion of the toner mother particle (ER (2)) is a value (ER (1)/ER (2)) within the range of 1.2 to 2.0.

Toner for developing electrostatic latent image and manufacturing method thereof

An electrostatic latent image developing toner includes a toner base particle which contains at least a binder resin, and has a domain-matrix structure, in which a matrix contains a styrene-acrylic resin, a domain contains an amorphous resin which is formed by combining a vinyl-based polymerized segment and a polyester-based polymerized segment, and the domain containing the amorphous resin and having a diameter of 100 nm or larger has a number-average domain diameter which falls in the range from 150 to 1000 nm.

Electrostatic latent image developing toner

A toner used for electrostatic latent image development which is excellent in fixing separability with maintaining sufficient low temperature fixability even in a high-speed machine and is also superior in crashing resistance, comprising toner particles, each comprising a core particle and a shell layer provided on the surface of the core particle, wherein the core particle comprises a binder resin containing a styrene-acrylic resin and a first styrene-acrylic modified polyester, and the shell comprises a second styrene-acrylic modified polyester resin.

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Hino, Japan

Kenshi Miyajima