Canon Kabushiki Kaisha

Yuujirou Nagashima

Koji Nishikawa

Yasuhiro Hashimoto

Yusuke Hasegawa

Tomohisa Sano

Yoshitaka Suzumura

Kozue Uratani

Yojiro Hotta

Shotaro Nomura

Takaaki Furui

Takashi Matsui

Keisuke Tanaka

Naoki Okamoto

Shohei Tsuda

Tomoya Nagaoka

Satoshi Arimura

Shuntaro Watanabe

Kosuke Fukudome

Hiroki Akiyama

Atsuhiko Ohmori

Takuya Mizuguchi

Hiroki Kagawa

A toner comprising: a toner particle that comprises a core particle comprising a binder resin, and a shell layer comprising a thermoplastic resin on a surface of the core particle; and organosilicon polymer particles on a surface of the toner particle, wherein a peak top molecular weight of the thermoplastic resin, according to measurement by gel permeation chromatography, is 30000 to 500000, a number-average primary particle diameter of the organosilicon polymer particles is 10 nm to 500 nm, and an absolute value of a difference (ΔSP) between an SP value (SP) of the organosilicon polymer particles and an SP value (SP) of the thermoplastic resin present in the shell layer is not more than 2.30.

Toner

A toner comprising a toner particle comprising a binder resin and organosilicon polymer particles on a surface of the toner particle, wherein the binder resin comprising an amorphous resin and a crystalline polyester resin, an absolute value |SP−SP| of a difference between an SP value (SP) of the organosilicon polymer particles and an SP value (SP) of the crystalline polyester resin is not more than 2.00 (cal/cm), and an amount of adsorbed water in the organosilicon polymer particles at a temperature of 30° C. and a humidity of 80% RH is not more than 20 mg/g.

A toner is provided, which has a toner particle that contains a binder resin, and organosilicon polymer particle on a surface of the toner particle. A methanol concentration a (vol %) of the organosilicon polymer particle in a wettability test and a methanol concentration b (vol %) of the toner particle in a wettability test satisfy Expression (I) below:||&#x2264;25&#x2003;&#x2003;(I), and

A toner comprising a toner particle that contains a binder resin and fine particles A at the surface of the toner particle, wherein the fine particles A are organosilicon polymer fine particles, the organosilicon polymer fine particles have a number-average primary particle diameter of 30 nm to 500 nm, the organosilicon polymer fine particles have an attachment index for a polycarbonate film of not more than 3.5, the organosilicon polymer fine particles penetrate into the toner particle in a penetration depth b (nm), and protrude from the toner particle in a protrusion height c (nm), and b and c satisfy 0.05&#x2264;b/(b+c)&#x2264;0.40.

Toner and method for producing toner

Toner comprising a toner particle containing binder resin and colorant, wherein fine particles A (organosilicon polymer particles containing an organosilicon polymer) and fine particles B are present at the toner particle surface, the organosilicon polymer has structure in which Si and O are alternately bonded to each other, portion of Si in the organosilicon polymer has R&#x2014;SiOstructure, and content of the fine particles A, proportion for area of peak originating with silicon having the structure, volume resistivity of the fine particles B, total coverage ratio of the toner particle surface by the fine particles A embedded in the toner particle (A1) and the fine particles A not embedded in the toner particle (A2), percentage for area occupied by the fine particles A2, content of the fine particles B in the toner, and percentage for area occupied by the fine particles B embedded in the toner particle are prescribed range.

A toner comprising: a toner particle containing a binder resin; and an external additive, wherein the external additive comprises an external additive A and B; the external additive A has a number-average primary particle diameter of 35 to 300 nm, a dielectric constant &#x3b5;of not more than 3.50, and a shape factor SF-1 of not more than 114, and is an organosilicon polymer particle having a particular T3 unit structure; a proportion for an area of a peak originating from silicon having the T3 unit structure with reference to that of all silicon elements is 0.50 to 1.00; the external additive B has a number-average primary particle diameter of from 5 nm to 25 nm and a dielectric constant &#x3b5;that satisfies formula (A): 0.50&#x2264;&#x3b5;&#x2212;&#x3b5;(A); and a coverage ratio by the external additive B for the toner particle surface is 50% to 100%.

A toner comprising an organosilicon polymer particle and a toner particle containing a binder resin and a wax, wherein the organosilicon polymer particle contains an organosilicon polymer, a part of silicon atoms in the organosilicon polymer has a T3 unit structure, a ratio of an area of peaks derived from silicon having the T3 unit structure relative to a total area of peaks derived from all silicon element contained in the organosilicon polymer particle is from 0.70 to 1.00 inSi-NMR measurement of the organosilicon polymer particle, a plurality of domains of the wax are present in a cross-section of the toner particle, the wax is an ester wax, the average long diameter of the domains of the ester wax is from 0.03 &#x3bc;m to 2.00 &#x3bc;m, and the SP value SPw of the wax is from 8.59 to 9.01.

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.

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.

A toner having a toner particle containing a binder resin, an amorphous polyester, and a colorant, wherein a softening point of the toner is at least 110&#xb0; C. and not more than 140&#xb0; C.; an integrated value f1 for stress of the toner is not more than 10 g&#xb7;m/sec, as measured using a tack tester, with a temperature for a probe end being 150&#xb0; C. and a press holding time being 0.01 seconds; and an integrated value f2 for stress of the toner is at least 30 g&#xb7;m/sec, as measured using a tack tester, with a temperature for a probe end being 150&#xb0; C. and a press holding time being 0.1 seconds.

Toner, developing apparatus, and image-forming apparatus provided with toner

Provided is a toner comprising a toner particle including a binder resin, an amorphous polyester, and a colorant, wherein the binder resin includes a vinyl resin, the toner has a softening point of at least 110&#xb0; C. and not more than 140&#xb0; C., an amount of the amorphous polyester is at least 4.0 parts by mass and not more than 30.0 parts by mass with respect to 100 parts by mass of the binder resin, and a temperature T at which an area increasing rate of one toner particle sample becomes 1.40, is not more than 110&#xb0; C., and a slope of the area increasing rate with respect to a temperature in the range of the area increasing rate of 1.40 to 2.00 is not more than 0.07.

Toner, developing device, and image forming apparatus

A toner comprising a toner particle containing a binder resin, a colorant, an amorphous polyester, and a crystalline polyester, wherein the binder resin contains a vinyl resin; the amorphous polyester has a monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons, and a monomer unit derived from a dialcohol; the content of the monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons is 10 to 50 mol % with reference to the total monomer units derived from a carboxylic acid in the amorphous polyester; and in a cross section of the toner particle, the vinyl resin constitutes a matrix and the amorphous polyester constitutes domains, and the crystalline polyester is present in the interior of the domains.

Toner, developing apparatus, and image-forming apparatus

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.

Provided is a toner having a toner particle that contains a binder resin, a colorant, a wax, and a crystalline polyester, wherein two or more peak tops for crystallization peaks are present in a temperature range from 40&#xb0; C. to 80&#xb0; C. in a first DSC curve obtained by a process or cooling the toner from 100&#xb0; C. to 20&#xb0; C. at 0.5&#xb0; C./min, and using &#x394;H(0.5) for the exothermic quantity for the peak on the lowest temperature side of these crystallization peaks and using &#x394;H(100) for the exothermic quantity of the crystallization peak on the lowest temperature side in a second DSC curve obtained by a process of cooling the toner from 100&#xb0; C. to 20&#xb0; C. at 100&#xb0; C./min, the ratio [&#x394;H(100)/&#x394;H(0.5)] is at least 2.0 and not more than 6.0.

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Susono, Japan

Yuujirou Nagashima