Canon Kabushiki Kaisha

Tsutomu Shimano

Kenta Kamikura

Masatake Tanaka

Naoya Isono

Yu Yoshida

Shintaro Noji

Yoshihiro Nakagawa

Kunihiko Nakamura

Yuki Nishizawa

Kohei Matsuda

Tsuneyoshi Tominaga

Reo Tagawa

Takashi Matsui

Kenji Aoki

Shinsuke Mochizuki

Yuhei Terui

Kentaro Yamawaki

Shiro Kuroki

Sara Yoshida

Masao Suzuki

Koji Nishikawa

Akane Masumoto

Tomonori Matsunaga

Toshihiko Katakura

Shohei Yamashita

Shohei Shibahara

Yasushi Katsuta

Taku Shimoda

Koji Yamaguchi

Toru Oguma

Akira Kuroda

Takayuki Toyoda

Hiroki Ogino

Junko Hirata

Kaori Noguchi

Yuna Yamamoto

Takashi Kenmoku

Takaaki Tsuruya

Hitoshi Itabashi

Tomoaki Nakai

Masashi Kawamura

Ryoichi Fujita

Tetsuya Sano

Katsuyuki Nonaka

Taiji Katsura

Yasutaka Yagi

Kenji Takagi

Kenichi Nakayama

Takeshi Kaburagi

Taku Watanabe

Masaki Shimomura

Noritaka Toyoizumi

Kenji Ookubo

Shigeto Tamura

Shun Sato

Dai Nozaki

Yuichi Yajima

Tohru Hiramatsu

A toner contains a toner particle containing a resin component and a wax. The resin component contains a vinyl polymer A having a monomer unit A represented by the formula (A): In a luminance histogram created from STEM observation, the total pixel value C in luminance 0 to 9 and the total pixel value A in luminance 0 to 245 satisfy 0.000≤C/A≤0.250. When the pixel value in luminance 10 to 245 has a maximum value P at luminance X, luminance M-luminance N ranges from 120 to 235, wherein the luminance M denotes a luminance at which the pixel value falls below 20% of P for the first time from the luminance X to 245, and the luminance N denotes a luminance at which the pixel value falls below 20% of the P for the first time from the luminance X to 10.

Toner and method for producing toner

The powder adhesive comprises a thermoplastic resin and particles of an aromatic compound, wherein the particles of an aromatic compound are particles of a compound that has an aromatic ring and an azo bond bonded to the aromatic ring, or are particles of a compound comprising a heteroaromatic ring comprising nitrogen atom; the thermoplastic resin comprises an ester group; and, designating Es (mmol/g) as an ester group concentration in the thermoplastic resin, M (mass %) as a content of the aromatic compound particles in the powder adhesive, and N (mmol/g) as a nitrogen atom concentration in the aromatic compound particles, Es is from 1.0 mmol/g to 4.5 mmol/g, M is from 1.0×10mass % to 1.0×10mass %, and N is from 5.0 mmol/g to 15.0 mmol/g.

Powder adhesive and bonded article

An electrophotographic developer set comprising a toner, and a powder adhesive, wherein the powder adhesive comprises a crystalline polyester resin, and a thermoplastic resin other than the crystalline polyester resin; the amount of the crystalline polyester resin in the powder adhesive is 21% by mass or more; the melting point of the crystalline polyester resin is 55° C. to 100° C.; in a viscoelasticity measurement, where Gt'(100) denotes a storage elastic modulus of the toner at 100° C. and Gb′(100) denotes a storage elastic modulus of the powder adhesive at 100° C., Gb′(100) is 1.0×10Pa or less and Gt′(100)/Gb′(100) is 1.2 or more.

Electrophotographic developer set comprising toner and powder adhesive, and method for producing bonded product

An electrophotographic developer set comprising a toner comprising a thermoplastic resin and a wax, and a powder adhesive comprising a thermoplastic resin and a wax, wherein where Ea (mmol/g) denotes an ester group concentration of the wax contained in the toner, Na (mass %) denotes a content of the wax in the toner, Eb (mmol/g) denotes an ester group concentration of the wax contained in the powder adhesive, and Nb (mass %) denotes a content of the wax in the powder adhesive, the Ea, the Na, the Eb and the Nb satisfy the following formulae: 0.00≤Ea≤2.45, 2.50≤Eb≤3.60, and 0.80≤Nb/Na.

Electrophotographic developer set comprising toner and powder adhesive, method for producing bonded product, and powder adhesive

A hot-melt adhesive comprising a thermoplastic resin and a first crystalline material, wherein when in differential scanning calorimetric measurement of the hot-melt adhesive, Tc (° C.) is a peak temperature of the highest peak of exothermic peaks observed in a temperature reduction process at 10° C./min following heating to 150° C. and Tm (° C.) is a peak temperature of the highest peak of endothermic peaks observed in a temperature increasing process at 10° C./min following the temperature reduction process, Tm−Tc is 20.0 to 70.0° C., and a tetrahydrofuran-soluble matter of the hot-melt adhesive has a weight-average molecular weight Mw, as measured by gel permeation chromatography, of 100,000 to 400,000.

Hot-melt adhesive and method for producing bonded article

An image forming apparatus includes an image forming portion, a fixing portion configured to heat the toner image formed on the sheet by the image forming portion and fix the toner image to the sheet, a folding portion configured to fold the sheet having passed through the fixing portion such that a surface of the sheet to which the powder adhesive is applied is inside, and a bonding portion configured to heat the sheet folded by the folding portion and bond the sheet by the powder adhesive. A relationship of Tmax1>Tmax2 is satisfied, where Tmax1 (° C.) is a highest temperature of the powder adhesive when being heated by the fixing portion and Tmax2 (° C.) is a highest temperature of the powder adhesive when being heated by the bonding portion.

Image forming apparatus

An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.

An adhesion apparatus includes: an image forming unit configured to form, through an electrophotographic process, an adhesive image of a powder adhesive on a sheet that is conveyed; and a control unit configured to control the image forming unit to use a first pattern in a first conveyance period, and use a second pattern different from the first pattern in a second conveyance period following the first conveyance period, as a formation pattern in an adhering section corresponding to part of a width direction orthogonal to a conveyance direction of the sheet.

Adhesion apparatus for forming image of powder adhesive, and image forming apparatus

Provided is an electrophotographic developer set having a toner and a powder adhesive, wherein the toner comprises a thermoplastic resin A; the powder adhesive comprises a thermoplastic resin B and a wax A; the wax A has two or more ester groups in the molecule; the thermoplastic resin B has an ester group; and in a viscoelasticity measurement, with Gt'(100) (Pa) being a storage elastic modulus at 100&#xb0; C. of the toner, and Gb&#x2032;(100) (Pa) being a storage elastic modulus at 100&#xb0; C. of the powder adhesive, Gb&#x2032;(100) is 1.00&#xd7;10Pa or less, and Gt&#x2032;(100)/Gb&#x2032;(100) is 1.20 or more, as well as a method for producing a bonded product using the above electrophotographic developer set.

Electrophotographic developer set including toner and powder adhesive, and method for producing bonded product

A toner comprising a toner particle comprising a binder resin and an azo dye, wherein the binder resin comprises a polymer A, the polymer A is a polymer having a monomer unit derived from methacrylonitrile, and a relationship among an amount of substance (mol) of the monomer unit derived from methacrylonitrile, an amount of substance (mol) of the azo dye, and the number of azo groups in the azo dye in the toner particle satisfies formula below:[(amount of substance of azo dye (mol))&#xd7;(number of azo groups in azo dye)/(amount of substance of monomer unit derived from methacrylonitrile (mol))]&#x2264;0.500.

Toner

Provided is a toner has a toner particle containing a binder resin and is characterized in that the binder resin contains a polymer A, which is a polymer of a composition containing a first polymerizable monomer, a second polymerizable monomer and a crosslinking agent, the first polymerizable monomer is at least one monomer selected from the group consisting of (meth)acrylic acid esters having an alkyl group with 18 to 36 carbon atoms, the crosslinking agent has two or more polymerizable double bonds, a content of the first polymerizable monomer in the composition is 5.0 to 60.0 mol %, a content of the second polymerizable monomer is 20.0 to 95.0 mol %, and when the SP values of the first polymerizable monomer, the second polymerizable monomer and the crosslinking agent are denoted by SP, SPand SP, respectively, the formulae 0.60&#x2264;(SP&#x2212;SP)&#x2264;15.00 and SP&#x3c;SP&#x3c;(SP+3.00) are satisfied.

A toner, including a toner particle that contains a binder resin and a release agent, wherein the binder resin contains a polymer A, the polymer A including a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer; the first polymerizable monomer is selected from (meth)acrylic acid esters having a Calkyl group; the toner has a first monomer unit content and a second monomer unit content in the polymer A which are within specific ranges, and assuming that an SP value of the first monomer unit is taken as SPand an SP value of the second monomer unit is taken as SP, the formula (1) below is satisfied, and the molecular weight of the release agent is at least 1,000.3.00&#x2264;(SP&#x2212;SP)&#x2264;25.00&#x2003;&#x2003;(1)

The toner has a toner particle in which a toner core containing a binder resin is coated with a shell layer, wherein the binder resin contains a polymer A that has a first monomer unit and a second monomer unit; the first unit is derived from (meth)acrylate ester having an alkyl group having 18 to 36 carbon atoms; the content of the first monomer unit in the polymer is 5.0 to 60.0 mol %; the content of the second monomer unit is 20.0 to 95.0 mol %; the following formula (1) is satisfied when the SP value of the first unit is denoted by SPand the SP value of the second unit is denoted by SP; and the toner core is coated with a highly uniform shell over at least 90% of the circumference of the toner cross section;3.00&#x2264;()&#x2264;25.00&#x2003;&#x2003;(1).

Toner, including: a toner particle that contains a binder resin and a wax, wherein the binder resin includes an amorphous resin A, and, in dynamic viscoelasticity measurement of the toner, when the temperature at which the loss elastic modulus G&#x2033; measured at a frequency of 1 Hz becomes 1.00&#xd7;10Pa is set as T(1 Hz), when the temperature at which the loss elastic modulus G&#x2033; measured at a frequency of 20 Hz becomes 1.00&#xd7;10Pa is set as T(20 Hz), and when the maximum value of the ratio (tan &#x3b4;) of the loss elastic modulus G&#x2033; with respect to the storage elastic modulus G', measured at a frequency of 20 Hz, in a range of from 60&#xb0; C. to 90&#xb0; C. is set as tan &#x3b4;(P), the toner satisfies T(20 Hz)&#x2212;T(1 Hz)&#x2264;7.0&#xb0; C., 0.80&#x2264;tan &#x3b4;(P)&#x2264;1.90, 60&#xb0; C.&#x2264;T(1 Hz)&#x2264;80&#xb0; C., and 60&#xb0; C.&#x2264;T(20 Hz)&#x2264;80&#xb0; C.

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Mishima, Japan

Tsutomu Shimano