Ricoh Company, Ltd.

Kumiai Chemical Industry Co., Ltd.

Yukiko Nakajima

Akiyoshi Sabu

Masahide Yamada

Shinya Nakayama

Shingo Sakashita

Atsushi Yamamoto

Yoshihiro Moriya

Daiki Yamashita

Hideyuki Santo

Suzuka Amemori

Yoshitaka Yamauchi

Keiji Makabe

Ryota Inoue

Taichi Nemoto

Akihiro Kotsugai

Keiko Osaka

Ippei Fujimoto

Yoshiki Yamaguchi

Kazuhito Kishi

Masahiro Samei

Hiroshi Yamashita

Atsushi Sato

Misaki Shimizu

Keisuke Kawabata

Kazumi Suzuki

Yasuo Katano

Yasunori Ishigaya

Toyoshi Sawada

Yohichiroh Watanabe

Haruyuki Honda

Satoshi Mochizuki

Yasutada Shitara

Daisuke Asahina

Tatsuya Morita

Toshihiro Ikeuchi

Hirokazu Arai

Suzuka Amerori

Provided is an agrochemical composition for foliage treatment, which does not cause phytotoxicity to a cultivated crop due to adhesion thereto when foliage treatment of an upland field is performed with pyroxasulfone, but has a high level of safety and an herbicidal effect on a broad spectrum of weeds. The agrochemical composition for foliage treatment comprises pyroxasulfone and a masking material that masks the pyroxasulfone, wherein the pyroxasulfone is microencapsulated in or coated with the masking material such that phytotoxicity to a cultivated crop due to adhesion thereto when foliage spraying is performed is avoided.

Agrochemical composition for foliage treatment

A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.

Toner, developer using the toner, image forming apparatus

A fixing device includes a fixing rotator formed into a loop and rotatable in a predetermined direction of rotation and a pressure rotator disposed outside the loop formed by the fixing rotator and pressed against the fixing rotator to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed. A stay is disposed opposite the pressure rotator via the fixing rotator. A heater is disposed opposite an inner circumferential surface of the fixing rotator to heat the fixing rotator. A pressurization member is pressed against the heater via the fixing rotator. A housing is interposed between the stay and the heater. A temperature detector is mounted on the housing to detect a temperature of the heater.

Fixing device and image forming apparatus having temperature detector

A fixing device includes a first support and a second support to rotatably support a fixing rotator at a first lateral end and a second lateral end of the fixing rotator in an axial direction thereof. A first stopper is mounted on the first support. A second stopper is mounted on the second support. A first skew restraint projects from an outer circumferential surface of the fixing rotator radially at the first lateral end of the fixing rotator in the axial direction thereof. A second skew restraint projects from the outer circumferential surface of the fixing rotator radially at the second lateral end of the fixing rotator in the axial direction thereof. The second skew restraint comes into contact with the second stopper as the fixing rotator moves in the axial direction thereof toward the first support.

Fixing device, belt device, and image forming apparatus

An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25&#xb0; C. to 65&#xb0; C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5&#xb0; C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.

Electrophotographic toner, developer containing the toner, and image forming apparatus

A resin for toner contains a polyhydroxycarboxylic acid skeleton and a rigid skeleton.

Resin for toner, toner using the resin, and development agent using the toner

A resin for use in toner is provided. The resin comprises an oligomer segment and a soft segment. The oligomer segment comprises a polyhydroxycarboxylic skeleton and an aromatic diol skeleton.

Resin for use in toner, toner using the resin, developer using the toner, image forming apparatus and method using the toner, and method of manufacturing resin

A toner including a binder resin having a glass transition temperature (Tg) observed at least at one point from 25 to 65&#xb0; C. in a differential scanning calorimeter at a rate of temperature increase of 5&#xb0; C./min, wherein the toner has a structure in which a structure appearing as a high phase difference image is dispersed in a structure appearing as a low phase difference image in a two-dimensional phase difference image observed by tapping mode AFM, and an X-ray diffraction chart in which a peak originated from an crystalline resin is observed in a range of a diffraction angle 2&#x3b8; of from 20 to 25&#xb0;, and wherein a ratio (I1/I2) of an intensity of the peak originated from an crystalline resin to an intensity (I2) of a halo originated from an amorphous composition is from 0.2 to 1.

Toner and developer

A colorless transparent toner containing a crystalline resin having a urethane bond and/or a urea bond.

Colorless transparent toner, toner set, development agent, image forming apparatus, and printed matter

A development agent containing toner that contains a binder resin having a crystalline resin that has a urethane and/or urea bond in its main chain, a coloring agent, and an organically modified inorganic laminate compound in which organic ions are at least partially substituted for ions present between layers of the organically modified inorganic laminate compound, and toner carrier that contains a core material whose surface is coated with a coating layer having a condensed compound of a melamine resin and/or a guanamine resin and an acrylic resin having a hydroxyl group.

Development agent and image forming apparatus employing same

A toner, including: a crystalline resin containing a urethane bond, a urea bond, or both thereof; and a compound represented by the following General Formula (1), wherein an amount of the compound represented by the General Formula (1) is 0.01% by mass to 0.25% by mass:CHR&#x2003;&#x2003;General Formula (1)

Toner, developer and image forming apparatus

The toner includes a pigment; and a block copolymer having a polyester block A including a residual group of a hydroxycarboxylic acid, and a polyester block B including an anionic group. When cross-section of the block copolymer is observed by a tapping mode atomic force microscope to obtain a phase image of the cross-section, the polyester block B, which has relatively large phase delay, is dispersed as domains having an average size of from 20 nm to 100 nm in a domain of the polyester block A, which has relatively small phase delay. The block copolymer has a first glass transition temperature of from &#x2212;20&#xb0; C. to 20&#xb0; C., and a second glass transition temperature of from 35&#xb0; C. to 65&#xb0; C. when the first and second glass transition temperatures are determined from a thermogram obtained by subjecting the block copolymer to differential scanning calorimetry (DSC) at a temperature rising speed of 5&#xb0; C./min.

Toner, developer including the toner, image forming apparatus using the toner, and block copolymer

A toner includes a binder resin, a coloring agent, and a releasing agent containing two or more kinds of alkyl monoester compounds having a different number of carbon atoms in a range of from 30 to 50 carbon atoms. The toner has a crystallinity of 10% or more as measured by x-ray diffraction and/or the binder resin is a crystalline resin in an amount of 50% by weight or more of the binder resin. The two or more kinds of alkyl monoester compounds include a component A accounting for the largest amount ranging from 30% by weight to less than 50% by weight of the releasing agent and a component B accounting for the second largest amount ranging from 10% by weight to less than 50% by weight of the releasing agent.

Toner, development agent, and image forming apparatus using the same

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Kanagawa, Japan

Yukiko Nakajima