Canon Kabushiki Kaisha

Tomohisa Sano

Yusuke Hasegawa

Yoshitaka Suzumura

Michihisa Magome

Shuichi Hiroko

Takashi Matsui

Kozue Uratani

Tadashi Dojo

Takuma Ikejiri

Kazuyuki Sato

Yuujirou Nagashima

Satoshi Arimura

Akira Sakakibara

Eriko Yanase

Shotaro Nomura

Yoshihiro Ogawa

Keisuke Tanaka

Takashige Kasuya

Daisuke Yoshiba

Atsuhiko Ohmori

Junko Nishiyama

Shohei Yamashita

Miho Okazaki

Koji Nishikawa

Tomoya Nagaoka

Yuta Komiya

Tohru Hiramatsu

Yoshihiro Nakagawa

Tetsuya Kinumatsu

Kosuke Fukudome

Tsutomu Onuma

Kenji Ookubo

Nene Shibayama

Yuichi Mizoo

Nene Dojo

The toner is a toner including a toner particle comprising a binder resin, a crystalline material, wherein, when a ratio of an area occupied by the crystalline material in a toner surface observed with a scanning electron microscope after ruthenium-staining the toner under a specific condition (1) is represented by S(%), a ratio of an area occupied by the crystalline material in the toner surface observed with the scanning electron microscope after ruthenium-staining the toner under a condition (2) is represented by S(%), and a dispersion diameter of a plurality of domains formed of the crystalline material on the toner surface observed with the scanning electron microscope after the ruthenium-staining the toner under the condition (2) is represented by R(nm), the following expressions (1), (2), and (3) are satisfied.

Toner

There is provided a toner containing: a toner particle containing a binder resin, a releasing agent, and a colorant; and an iron oxide particle present on a surface of the toner particle, in which the iron oxide particle has a surface containing a compound having a specific structure.

A toner comprising a toner particle comprising a core particle comprising a binder resin and a diester wax, and a shell on a surface of the core particle, wherein the following formulas (1) and (2) are satisfied, where Sp is a partition coefficient of the shell and Wp is a partition coefficient of the diester wax:≤0.40  (1), and16.00≤≤20.00  (2).

A toner comprising a toner particle comprising a core particle comprising a binder resin and a wax, and a shell formed on a surface of the core particle, wherein the wax comprises a wax A, the shell comprises a resin comprising a functional group B, the wax A has a surface charge density DA of &#x2212;0.0080 to &#x2212;0.0025, and an absolute difference |DA&#x2212;DB| between the surface charge density DA of the wax A and a surface charge density DB of the functional group B is not more than 0.0025.

A toner including a toner particle that contains a binder resin and inorganic fine particles, wherein the binder resin contains a polymer A that includes a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer that is different from the first polymerizable monomer; the first polymerizable monomer is at least one selected from the group consisting of (meth)acrylate esters having an alkyl group having 18 to 36 carbons; the SP value of the first monomer unit and the SP value of the second monomer unit satisfy a specified relationship; each of the inorganic fine particles contains a substrate containing at least one inorganic element selected from metal elements and metalloid elements, and a coating layer; and the coating layer has a specified structure.

Toner and method of producing toner

A toner comprising a toner particle containing a resin component, wherein the resin component contains an amorphous polyester and a crystalline polyester, and in depth profile measurement of secondary ions on the toner particle surface by TOF-SIMS, given Ia(t) as the intensity of secondary ions derived from the amorphous polyester, Ic(t) as the intensity of secondary ions derived from the crystalline polyester, and I(t) as the total detected intensity of secondary ions derived from resin contained in the toner particle at a depth of t (nm) from the toner particle surface, the following formulae are satisfied within the range of 0&#x2264;t&#x2264;10:()&#x3e;()&#x3e;0.0000(()+())/()&#x2265;0.80and there is only one point of intersection between the depth profile curve of Ia(t) and Ic(t) within the range of 10&#x2264;t&#x2264;30.

Provided is a toner containing a toner particle including a binder resin, a wax, and a colorant. The softening point of the toner is at least 80&#xb0; C. and not more than 140&#xb0; C. The average circularity of the toner is at least 0.940. The integrated value of stress in the toner at 150&#xb0; C. which is measured by using a tackiness tester is at least 78 g&#xb7;m/sec.

A magnetic toner is provided, which has a magnetic toner particle containing a binder resin, a wax, and a magnetic body, wherein, when Dn is a number-average particle diameter of the toner, CVis coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn &#x2212;0.500 to +0.500, and CVis coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn &#x2212;1.500 to &#x2212;0.500, a relationship CV/CV&#x2264;1.00 is satisfied; an average brightness of the toner in the range of Dn &#x2212;0.500 to +0.500 is 30.0 to 60.0; and when, in a cross section of the toner observed using a transmission electron microscope, which is divided with a square grid having a side of 0.8 &#x3bc;m, coefficient of variation CVof an occupied area percentage for the magnetic body is 40.0 to 80.0%.

Magnetic toner and image-forming method

The toner has a toner particle that contains a binder resin, a colorant, a release agent, and a crystalline polyester, wherein the release agent contains an ester wax, and the peak top temperature of the maximum endothermic peak of the ester wax as measured with a differential scanning calorimeter is from 65&#xb0; C. to 85&#xb0; C., the ester wax satisfies specific conditions and the crystalline polyester satisfies specific conditions, the toner contains from 3.0 parts by mass to 20.0 parts by mass of the crystalline polyester per 100 parts by mass of the binder resin, and the mass ratio of the ester wax to crystalline polyester is from 25/75 to 75/25.

Provided is a toner including toner particles, each of which contains a binder resin, a colorant, a releasing agent and a crystalline polyester, wherein in an observation of a cross-section each of the toner particles by transmission electron microscopy, specific toner particles each of which has domains of the crystalline polyester and domains of the releasing agent, are present at a ratio of at least 70% by number of the toner particles in the toner, an arithmetic mean of maximum diameters of the domains of the releasing agent is within prescribed range, and the specific toner particles satisfy prescribed conditions.

A magnetic toner containing a magnetic toner particle having a binder resin and a magnetic body, and inorganic fine particles, wherein when the inorganic fine particles are classified as first inorganic fine particles, second inorganic fine particles, and third inorganic fine particles in accordance with fixing strength thereof to the magnetic toner particle and in the sequence of the weakness of the fixing strength, the content of the first inorganic fine particles, the ratio of the second inorganic fine particles to the first inorganic fine particles, and the coverage ratio X of coverage of the magnetic toner surface by the third inorganic fine particles are in prescribed ranges.

Magnetic toner

The magnetic toner contains a magnetic toner particle having a binder resin and a magnetic body, and inorganic fine particles, wherein the average circularity of the magnetic toner is at least 0.955 and, when classifying the inorganic fine particles, in accordance with the fixing strength thereof to the magnetic toner particle and in the sequence of the weakness of the fixing strength, as first inorganic fine particles, second inorganic fine particles, and third inorganic fine particles, the content of the first inorganic fine particles, the ratio of the second inorganic fine particles to the first inorganic fine particles, and the coverage ratio X are in prescribed ranges.

Provided is a toner including a binder resin, a colorant, a crystalline polyester, and a release agent, wherein a cross-sectional image of the toner is observed using a scanning transmission electron microscope, domains of the crystalline polyester are present in the cross-sectional image of the toner, the domains have a number-average major diameter of at least 50 nm and not more than 300 nm, the number of the domains is at least 8 and not more than 500, and the domains are present at least 60 number % and not more than 100 number % from an outline of the cross-sectional image to 25% of the distance between the outline and the centroid of the cross-sectional image.

A toner comprising toner particles, each of which contains a binder resin and a colorant, wherein an onset temperature Te (&#xb0; C.) of a storage elastic modulus E' obtained in a powder dynamic viscoelastic measurement on the toner is at least 50&#xb0; C. and not more than 70&#xb0; C., and a value at Te (&#xb0; C.) of a storage elastic modulus G&#x2032; obtained in a pellet dynamic viscoelastic measurement on the toner is at least 4.0&#xd7;10Pa and not more than 1.0&#xd7;10Pa.

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Mishima, Japan

Tomohisa Sano