Ricoh Company, Ltd.

Other

Takemoto Yushi Kabushiki Kaisha

Rocoh Company, Ltd.

Toyoshi Sawada

Keiko Shiraishi

Masanori Suzuki

Yohichiroh Watanabe

Shigenori Yaguchi

Kazumi Suzuki

Akihiro Kotsugai

Masashi Nagayama

Takuya Saito

Hitoshi Iwatsuki

Hiroyuki Kishida

Toyoaki Tano

Koichi Sakata

Kimitoshi Yamaguchi

Shinya Nakayama

Masahide Yamashita

Hiroshi Yamashita

Satoshi Kojima

Akiyoshi Sabu

Tsuneyasu Nagatomo

Atsushi Yamamoto

Takuya Seshita

Hiroshi Tohmatsu

Kohki Katoh

Tomomi Suzuki

Akihiro Kaneko

Yu Naito

Minoru Masuda

Tsuyoshi Sugimoto

Ryota Inoue

Masahide Yamada

Masayuki Ishii

Satoyuki Sekiguchi

Mariko Takii

Keiko Matsumoto

Keiji Makabe

Susumu Chiba

Mitsuo Aoki

Junichi Awamura

Katsunori Kurose

Shinichi Kuramoto

Shingo Sakashita

Daisuke Asahina

Suzuka Amemori

Motoharu Tanaka

Kumi Hasegawa

Tadashi Saitoh

Bing Shu

Tatsuhiko Osaki

Akinori Saito

Satoshi Aratani

Natsuko Matsushita

Yohichiro Watanabe

Hiroki Ogiso

Hideki Sugiura

Nekka Matsuura

Yoshihiro Moriya

Akinori Saitoh

Yukiko Nakajima

Masahiro Ohki

Masaki Yoshino

Saori Yamada

Takeshi Takada

Kazuhito Watanabe

Akira Azami

Tatsuya Morita

Keiko Osaka

Kohsuke Nagata

Azumi Miyaake

Daichi Hisakuni

Yumiko Yagi

Motoshi Iizuka

Shun Kohri

A toner includes polyolefin and has an exothermic peak in a range from 40° C. to 70° C. in a cooling process of the polyolefin by the DSC after a first heating process of the polyolefin by DSC. The polyolefin does not have an exothermic peak in the cooling process of the polyolefin by the DSC after the first heating process of the polyolefin by the DSC, and has an exothermic peak in a range from 0° C. to 30° C. in a second heating process of the polyolefin by the DSC.

Toner, developer, toner set, toner receiving unit, image forming apparatus, and image forming method

Printed matter is provided which includes a recording medium, a colored layer overlying the recording medium, and an infrared-absorbing-pigment-containing layer overlying the recording medium and underlying the colored layer. The colored layer contains a colorant. The infrared-absorbing-pigment-containing layer contains an infrared absorbing pigment having an average diameter of from 120 to 250 nm in the infrared-absorbing-pigment-containing layer.

Printed matter, infrared-absorbing-pigment-containing toner, tonner set, image forming method, and image forming apparatus

An image forming method is provided. The image forming method includes: forming an electrostatic latent image on an electrostatic latent image bearer; developing the electrostatic latent image on the electrostatic latent image bearer with a toner to form a toner image; transferring the toner image from the electrostatic latent image bearer onto a continuous resin film; fixing the toner image on the continuous resin film with a heat roller or a heat belt. The toner contains a maleic-acid-modified polyolefin having a polypropylene block in a main chain.

Image forming method and image forming apparatus

A toner is provided. The toner comprises a maleic-acid-modified polyolefin having a polypropylene block in a main chain and having a weight average molecular weight of 60,000 or more.

Toner, toner accommodating unit, image forming apparatus, and image forming method

Provided is a toner including a binder resin and a colorant, wherein the colorant includes Solvent Red 49, and an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

Toner, toner stored unit, image forming apparatus, and image forming method

A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.

Toner, toner set, toner accommodating unit, image forming method, and image forming apparatus

A toner set for use in an image forming apparatus is provided. The toner set includes a fluorescent toner and a color toner. The fluorescent toner comprises a binder resin and a fluorescent agent. The color toner comprises a binder resin and a colorant. A 60-degree gloss value (Gf) of a solid image of the fluorescent toner is in a range of from 10 to 25, and a difference (Gn&#x2212;Gf) between a 60-degree gloss value (Gn) of a solid image of the color toner and the 60-degree gloss value (Gf) of the solid image of the fluorescent toner is in a range of from 10 to 28.

Toner set, image forming apparatus, and image forming method

A toner includes a europium complex represented by the following Chemical formula  where A represents 2-naphthyl group, 2-naphthyl group having a substitution group selected from the group consisting of an alkyl group, an alkoxy group, and a halogen, R represents a fluoroalkyl group having one to three carbon atoms or a methyl group, and R, R, R, and Reach, independently represent hydrogen atoms, alkyl groups, or aryl groups, wherein the toner has a hydroxyl value of from 20 to 40 mgKOH/g.

Toner, image forming apparatus, image forming method, and toner accommodating unit

Provided is a resin for a toner, which is a copolymer including a crystalline segment, and having a maximum elastic stress value at 100&#xb0; C. (ES100) of 1,000 Pa or less, and a maximum elastic stress value at 70&#xb0; C. (ES70) of 1,000 Pa or greater when the temperature is lowered from 100&#xb0; C. to 70&#xb0; C., where the maximum elastic stress values are measured according to a large amplitude oscillatory shear procedure.

Resin for toner, toner, developer, image forming apparatus, and process cartridge

A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50&#xb0; C. measured by pulse NMR is &#x2266;0.05 msec., spin-spin relaxation time (t130) at 130&#xb0; C. when warmed from 50&#xb0; C. to 130&#xb0; C. is &#x3e;15 msec., and spin-spin relaxation time (t'70) at 70&#xb0; C. when cooled from 130&#xb0; C. to 70&#xb0; C. is &#x2266;1.00 msec. A binarized image obtained by binarizing a phase image of the toner observed by a tapping mode AFM based on intermediate value between maximum and minimum phase difference values in the phase image includes first phase difference images constituted by large phase-difference portions and a second phase difference image constituted by a small phase-difference portion. The first phase difference images are dispersed in the second phase difference image. The dispersion diameter of the first phase difference images is 150 nm or less.

Toner, developer, image forming apparatus, and image forming method

A toner of the present invention includes at least a colorant and a resin, has crystallinity CX or 20 or greater, and has a dynamic viscoelasticity characteristic in which a logarithmic value Log G'(50) of storage elastic modulus (Pa) at 50&#xb0; C. is from 6.5 to 8.0 and a logarithmic value Log G&#x2032;(65) of storage elastic modulus (Pa) at 65&#xb0; C. is from 4.5 to 6.0, when the dynamic viscoelasticity characteristic is measured by temperature sweep from 40&#xb0; C., at a frequency of 1 Hz, at a strain amount control of 0.1%, and at a temperature elevating rate of 2&#xb0; C./min.

Toner, image forming apparatus, image forming method, process cartridge, and developer

Provided is a toner containing a binder resin. The binder resin contains a crystalline resin. The toner has a maximum endothermic peak temperature (P1) of from 50&#xb0; C. to 80&#xb0; C. and a total endothermic amount (Q) of from 35 J/g to 90 J/g at a first temperature elevation of differential scanning calorimetry. A ratio (Q/Q) of a total endothermic amount (Q) of the toner in a temperature range of from 20&#xb0; C. to the maximum endothermic peak temperature (P1) to the total endothermic amount (Q) of the toner is from 0.65 to 0.83.

Toner, developer, image forming apparatus, and process cartridge

A toner is provided. The toner includes a crosslinked polyester resin, and a block copolymer. The crosslinked polyester resin includes a diol component, which includes an aliphatic diol component having 3 to 10 carbon atoms in an amount of 50% by mole, and a crosslinked component, which is at least one of a crosslinked component of an aliphatic alcohol having three or more valences and a crosslinked component of an aliphatic acid having three or more valences, and the block copolymer includes a crystalline segment (a) and a non-crystalline segment (b). The toner has a first glass transition temperature (Tgst) of from 20&#xb0; C. to 50&#xb0; C., which is determined by subjecting the toner to differential scanning calorimetry (DSC) and measuring a glass transition temperature in a first temperature rising process in the differential scanning calorimetry (DSC).

Toner for image formation, and developer and image forming apparatus using the toner

Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1&#x2212;T2&#x2266;30&#xb0; C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0&#xb0; C. to 100&#xb0; C. at the temperature rising rate of 10&#xb0; C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100&#xb0; C. to 0&#xb0; C. at the temperature falling rate of 10&#xb0; C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).

Toner, development agent, image forming apparatus, and process cartridge

Toner contains a mother toner particle containing a binder resin and a coloring agent and an external additive to cover the mother toner particle, wherein the external additive contains a resin particle, wherein the resin particle has an outer shell layer formed of silica or modified silica, wherein the resin particle has a non-spherical form with a shape factor (SF) of 1.20 or greater as calculated by the following relationship 1,Shape factor(SF)=[(Absolute maximum length of particle)/Projected area of particle)]&#xd7;(&#x3c0;/4)&#x2003;&#x2003;Relation 1.

Toner, development agent, toner container, and image forming apparatus

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Kanagawa, Japan

Toyoshi Sawada