Canon Kabushiki Kaisha

Atsuhiko Ohmori

Takashi Matsui

Katsuhisa Yamazaki

Michihisa Magome

Shuhei Moribe

Shotaro Nomura

Yusuke Hasegawa

Tatsuya Saeki

Yoshitaka Suzumura

Kozue Uratani

Koji Nishikawa

Daisuke Yoshiba

Kosuke Fukudome

Hiroyuki Tomono

Shuichi Hiroko

Sho Kimura

Masaki Yamada

Keisuke Tanaka

Tomohisa Sano

Hiroki Akiyama

Minoru Ito

Shuntaro Watanabe

Kazumichi Nakahama

Yasuhiro Hashimoto

Takaaki Furui

Keisuke Adachi

Hiroki Kagawa

Tomoko Sugita

Takayuki Toyoda

Yuujirou Nagashima

Takuya Mizuguchi

A toner is provided that comprises a toner particle comprising a binder resin and a wax, and an inorganic fine particle on a surface of the toner particle, wherein the binder resin comprises a resin A; the toner satisfies 2.50≤SPa−SPw≤4.50, where SPa (cal/cm)is the SP value of the resin A, and SPw (cal/cm)is the SP value of the wax; the inorganic fine particle comprises a silica fine particle whose surface has been treated with a silicone oil; in aSi solid-state NMR measurement of the silica fine particle, 30≤B≤60 and 4.0≤A/B≤6.0 are satisfied, taking A as an integration value of a D unit obtained by taking an integration value of a Q unit in a CP/MAS measurement as 100, and taking B as an integration value of a D unit obtained by taking an integration value of a Q unit in a DD/MAS measurement as 100.

Toner

A toner comprising: a toner particle comprising a binder resin and a hydrocarbon wax; and inorganic fine particles, wherein the inorganic fine particles include silica fine particles surface-treated with specific polydimethylsiloxanes, a total amount of trimethylsilanol in the silica fine particles is from 1.0 ppm to 5.0 ppm, where a standard value of an amount of ions of an ester group is measured by time-of-flight secondary ion mass spectrometry, one or more peaks of the standard value are present within a range of 100 nm from the surface of the toner particle, and the maximum value A(d max) among the peaks of the standard value and the standard value A(0) on the surface of the toner particle satisfy the following relationships:1.05≤(max)/(0)≤5.00,(0)≥0.010.

A toner comprises a toner particle containing a resin component and a wax; and an inorganic fine particle on a surface of the toner particle, wherein in the cross section of the toner particle, domains including the wax are present in a region ranging from a surface of the toner particle to a depth of 600 nm from the surface, wherein when a percentage ratio of sum of areas of all the domains in the region with respect to an area of the region is R2, and when a percentage ratio of sum of areas of the domains having a major diameter of 10 to 120 nm in the region with respect to the area of the region is R1, R1 and R2 satisfy the following formulae (1) and (2):2.0≤1(%)≤15.0  formula(1)1(%)/2(%)≥0.60  formula (2).

Toner and method for producing toner

A toner comprising: a toner particle containing a resin component and a wax; and an inorganic fine particle on the surface of the toner particle, wherein, in a cross section of the toner particle, domains containing the wax are observed, and when among the domains, domains having a major diameter of 10-300 nm are defined as domains S, an occupation area percentage of which a ratio of a total sum of areas occupied by the domains S in a region from a surface of the toner particle to a depth of 600 nm in the cross section with respect to an area of the region, is 3.0-15.0%, and wherein the inorganic fine particle contains a fine particle A having a volume resistivity of 1.0&#xd7;10to 3.0&#xd7;10&#x3a9;&#xb7;cm, and having a relative permittivity &#x3b5;r of 100 or more.

A toner including a toner particle containing a binder resin, wherein the binder resin contains a crystalline resin, and in viscoelasticity measurement of the toner with Tp being a peak temperature of an endothermic peak derived from the crystalline resin in DSC of the toner, given G'(Tp&#x2212;5, 0.01 Hz) as a storage modulus at a temperature of Tp&#x2212;5&#xb0; C. and a frequency of 0.01 Hz, G&#x2032;(Tp&#x2212;5, 10 Hz) as a storage modulus at a temperature of Tp&#x2212;5&#xb0; C. and a frequency of 10 Hz, and G&#x2032;(Tp&#x2212;30, 10 Hz) as a storage modulus at a temperature of Tp&#x2212;30&#xb0; C. and a frequency of 10 Hz, the following formulae are satisfied:&#x2032;(&#x2212;30,10 Hz)/&#x2032;(&#x2212;5,0.01 Hz)&#x2264;1.40&#x2032;(&#x2212;5,10 Hz)/&#x2032;(&#x2212;5,0.01 Hz)&#x2264;2.20.

Provided is an external additive having a resin particle containing a crystalline resin, and an inorganic fine particle containing a metal atom, the inorganic fine particle being embedded in the resin particle, wherein part of the inorganic fine particle being exposed on a surface of the resin particle, the maximum endothermic peak temperature of the external additive during a first temperature rise is from 50.0&#xb0; C. to 120&#xb0; C., the shape factor SF-2 of the external additive is from 110 to 150, and the external additive satisfies following formulae (1) and (2) below, in which Za (mass %) is the percentage content of a metal atom contained in the inorganic fine particle on the surface of the external additive in X-ray photoelectron spectroscopy, and Zb (mass %) is the percentage content of the metal atom in thermogravimetric analysis of the external additive,&#x2265;15&#x2003;&#x2003;(1), and&#x2265;0.7&#x2003;&#x2003;(2)

External additive, method for manufacturing external additive, and toner

An external toner additive having a resin fine particle containing a crystalline resin and an inorganic fine particle embedded in the resin fine particle, wherein part of the inorganic fine particle is exposed on the surface of the resin fine particle, and in differential scanning calorimetry of the external toner additive, the maximum endothermic peak temperature T1 (&#xb0; C.) during a first temperature increase and the maximum exothermic peak temperature T2 (&#xb0; C.) during a first temperature decrease satisfy the formulae (1) to (3) below, with measurement performed between &#x2212;40&#xb0; C. and 150&#xb0; C. at a rate of increase of 10&#xb0; C./min during the first temperature increase and between 150&#xb0; C. and &#x2212;40&#xb0; C. at a rate of decrease in temperature of 10&#xb0; C./min during the first temperature decrease:1-2&#x2264;40.0&#x2003;&#x2003;(1)50.0&#x2264;1&#x2264;120.0&#x2003;&#x2003;(2)10.0&#x2264;2&#x2264;80.0&#x2003;&#x2003;(3).

External toner additive, method for producing external toner additive, and toner

A toner comprising a toner particle containing a resin and a colorant, wherein, with respect to a temperature-storage elastic modulus curve obtained by powder dynamic viscoelastic measurement on the toner, (I) the relative minimum values for the variation in the storage elastic modulus E' with respect to temperature T in the temperature range of at least 30&#xb0; C. and not more than 180&#xb0; C. have a relative minimum value of equal to or less than &#x2212;1.00&#xd7;10and the relative minimum value on the lowest temperature side is equal to or less than &#x2212;1.00&#xd7;10; (II) the storage elastic modulus E&#x2032; (50) of the toner at 50&#xb0; C. is at least 1.00&#xd7;10and not more than 9.00&#xd7;10; and (III) for a storage elastic modulus E&#x2032; (120) of the toner at 120&#xb0; C., E&#x2032; (50) and E&#x2032; (120) satisfy 1.50&#x2264;[E&#x2032; (50)]/[E&#x2032; (120)]&#x2264;3.00.

Provided is a toner having a toner particle including a binder resin and a colorant, wherein the toner has a softening point of at least 100&#xb0; C. and not more than 150&#xb0; C., and when Tgt represents a glass transition temperature (&#xb0; C.) of the toner during a second temperature rise as measured with a DSC, Tgf represents a glass transition temperature (&#xb0; C.) of a tetrahydrofuran-insoluble matter of the binder resin during a second temperature rise as measured with a DSC, and Tgk represents a glass transition temperature (&#xb0; C.) of a tetrahydrofuran-soluble matter of the binder resin during a second temperature rise as measured with a DSC, the toner satisfies Tgt&#x3e;Tgf (1), Tgt&#x3e;Tgk (2), and 35&#xb0; C.&#x2264;Tgf&#x2264;70&#xb0; C. (3).

A toner comprising: a toner particle containing a binder resin and a colorant; and an external additive, wherein the external additive is a composite particle having an organic substance and an organosilicon polymer coating layer on the surface of the organic substance, and when a curve for the variation (dE'/dT) in the storage elastic modulus E&#x2032; of the toner with respect to temperature T [&#xb0; C.] is obtained on the basis of a curve of the temperature T&#x2014;the storage elastic modulus E&#x2032; [Pa] of the toner, as determined by powder dynamic viscoelasticity measurements of the toner, the relative minimum value on the lowest temperature side between the onset temperature and 90&#xb0; C. is &#x2212;1.35&#xd7;10or less.

Toner, and external additive for toner

A toner includes toner particles and an external additive; the external additive includes an external additive A containing fine particles of a crystalline resin or fine particles of a wax; the crystalline resin and the wax each have an urethane bond or an urea bond; and the melting point of the crystalline resin and the melting point of the wax are each from 50&#xb0; C. to 130&#xb0; C.

Toner and external additive for toner

Provided is a toner having a toner particle that contains a binder resin and a magnetic particle, wherein the magnetic particle satisfies the following stipulations (i) to (iii): (i) the magnetic particle has a prescribed shape and has a protruded portion on a plane portion thereof, (ii) the magnetic particle has a core particle that contains magnetite and has a coating layer, and (iii) the coating layer contains an iron-containing oxide and at least one of a silicon-containing oxide and an aluminum-containing oxide. In a molecular weight distribution measured on the tetrahydrofuran-soluble matter of the toner, the ratio (Mw/Mn) of a weight-average molecular weight to a number-average molecular weight is at least 10.0.

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 developing apparatus, including toner for developing an electrostatic latent image, a toner carrier for carrying the toner, and a regulating member for regulating a layer thickness of the toner carried by the toner carrier. The toner carrier is placed to be brought into contact with the electrostatic latent image bearing member. The toner carrier includes a substrate, an elastic layer, and a surface layer containing a urethane resin. The urethane resin has a partial structure derived from a reaction between a compound represented by the structural formula (1) and a polyisocyanate. The toner contains toner particles each containing a binder resin and a magnetic material, and inorganic fine particles. The toner has a weight average particle diameter (D4) of from 9.5 &#x3bc;m to 14.0 &#x3bc;m. The toner has a porosity of 50 or more and 56 or less.

Image-forming apparatus, image-forming method, developing apparatus, and developing method

A magnetic toner contains magnetic toner particles and silica fine particles. The magnetic toner has a thermal conductivity in the range of 0.230 to 0.270 W/(m&#xb7;K). Primary particles of the silica fine particles have a number-average particle diameter (D1) in the range of 5 to 20 nm. The coverage X1 of the magnetic toner surface by the silica fine particles ranges from 40% to 75% by area as determined using an X-ray photoelectron spectrometer (ESCA). The diffusion index (X1/X2) satisfies the following formula:Diffusion index&#x2267;&#x2212;0.0042&#xd7;1+0.62

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Suntou-gun, Japan

Atsuhiko Ohmori