Ricoh Company, Ltd.

Ayano Momose

Makoto Matsushita

Akira Izutani

Hideaki Yasunaga

Keiichiro Juri

Yuri Haga

Hiroaki Takahashi

Masayuki Koyano

Mio Kumai

Azumi Miyaake

Kaori Miyahara

Satoshi Kojima

Takayuki Shimizu

Hiroki Kobayashi

Hiroki Hagiwara

Yuuki Mizutani

Kiminori Masuda

Amika Sagara

Mihoko Matsumoto

Maiko Koeda

Hiroki Nakane

An ink includes water, a coloring material, an organic solvent having a solubility parameter of from 8.0 to 13.0, an urethane resin particle and a metal ion, wherein the organic solvent having the solubility parameter of from 8.0 to 13.0 has a proportion of from 10.0% by mass to 30.0% by mass to the ink, where the metal ion is at least one selected from an alkali metal ion and an alkaline earth metal ion, where the metal ion has a proportion of from 4000 mg/L to 8000 mg/L to the ink.

Ink, ink container, recording device, recording set and recording method

An active-energy-ray-curable composition, a cured material of the active-energy-ray-curable composition satisfying a critical load of 5.0 g or more but 25.0 g or less, the critical load being obtained by a continuous loading test method using a variable normal load friction and wear measurement device, the cured material having an average thickness of 10 &#x3bc;m and being formed by coating the active-energy-ray-curable composition on a substrate and by irradiating and curing the active-energy-ray-curable composition with active energy rays having illuminance of 1.5 W/cmand an amount of irradiation of 200 mJ/cm.

Active-energy-ray-curable composition, active-energy-ray-curable ink, two-dimensional or three-dimensional image forming method, two-dimensional or three-dimensional image forming apparatus, and cured material

A composition for seamless belt includes a thermoplastic resin; and a conductive agent. A liquid extracted from the composition with methanol has an intensity not greater than 7&#xd7;10in a total ion chromatogram.

Composition for seamless belt, and image forming apparatus using the belt

A semiconductive resin composition includes at least two thermoplastic resins and a conductive filler. Each of the two thermoplastic resins has a sea-island structure, and 40% to 75% of the conductive filler are present in the thermoplastic resin in an island portion of the sea-island structure at an areal ratio of a cross section observed with a scanning electron microscope.

Semiconductive resin composition, member for electrophotography and image forming apparatus

An image forming apparatus includes at least an image bearer; an electrostatic latent image former to form an electrostatic latent image on the image bearer; an image developer to develop the electrostatic latent image with a toner to from a toner image; a first transferer to transfer the toner image from the image bearer onto an intermediate transfer belt; and a cleaner including a cleaning blade having a Martens hardness of from 0.8 to 10.0 N/m, to clean the intermediate transfer belt while contacting the surface of the intermediate transfer belt. The intermediate transfer belt includes a thermoplastic resin and a conductive resin, and has a surface concentration of oxygen atoms derived from the conductive resin, measured by XPS, of from 1.0% to 3.0% by atom.

Image forming apparatus

An intermediate transfer belt for use in electrophotography is provided. The intermediate transfer belt includes a thermoplastic resin having a vinylidene difluoride (VdF) structure. The intermediate transfer belt has a degree of crystallinity in the range of 17% to 39%.

Intermediate transfer belt

An intermediate transfer belt includes a thermoplastic resin and a fibrous material. The fibrous material has an orientation angle Fa of from 5&#xb0; to 30&#xb0; in a direction perpendicular to a circumferential direction of the intermediate transfer belt.

Intermediate transfer belt, and image forming apparatus using the belt

An intermediate transfer member, including:

Intermediate transfer member and image forming apparatus

An intermediate transferer includes a polyvinylidene fluoride resin including polyvinylidene fluoride and a vinylidene fluoride-hexafluoropropylene copolymer, a conductive agent and an additive. The additive includes a polymer including a polyalkyleneoxide structure having a number-average molecular weight not less than 1,000. The polyvinylidene fluoride resin includes the vinylidene fluoride-hexafluoropropylene copolymer in an amount of from 5 to 30 parts by weight per 100 parts by weight of the polyvinylidene fluoride. The intermediate transferer includes the conductive agent in an amount of from 1.0 to 20 parts by weight and the additive in an amount of from 1.0 to 10 parts by weight per 100 parts by weight of the polyvinylidene fluoride resin.

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Tokyo, Japan

Ayano Momose