Ricoh Company, Ltd.

Mitsubishi Gas Chemical Company, Inc.

W.l. Gore & Associates, Co., Ltd.

Matsushita Electric Ind., Ltd.

Masahiko Ishikawa

Satoshi Takahashi

Takamasa Hase

Hiroshi Gotou

Satoshi Kojima

Ryota Inoue

Akihiko Matsuyama

Masami Tomita

Hiroshi Kato

Yuusuke Furuichi

Takahiro Yoshida

Hideki Sugiura

Hiroshi Seo

Yoshihiro Moriya

Keita Katoh

Noboru Ohtani

Yoshiyuki Masuda

Yoshitaka Masuda

Yoshiya Kimura

Takatoshi Matsumura

Noriyuki Kato

Kazuhiko Umemura

Yoshiki Yanagawa

Toshiaki Yamada

Tatsuki Yamaguchi

Yukio Otome

Takeshi Shibuya

Yoshiaki Kawasaki

Masayasu Nonogaki

Akikazu Amagai

Atsushi Hirashima

Takao Kawaki

Tatsuru Moritani

Katsushige Hayashi

Masaki Kudo

Maiko Koeda

Mitsuhiko Masumoto

Takuya Hasaki

Hiroyoshi Fujimoto

Yoshiaki Masuda

Hajime Ban

Yasuhiro Hirai

Tomoyuki Takane

Masayuki Nakajima

Toyohiro Matsuura

Kyoko Nishizaki

An ink contains at least one kind of polyether-modified siloxane compound and at least one kind of aliphatic alcohol alkylene oxide compound.

Ink, ink set, ink container, image forming method, and image forming apparatus

An ink discharge device is provided including an ink, an ink discharge head, and a circulator. The ink discharge head includes a nozzle, an individual liquid chamber communicated with the nozzle, a flow-in channel, and a flow-out channel. The circulator circulates the ink by letting the ink flow into the individual liquid chamber via the flow-in channel and flow out from the individual liquid chamber via the flow-out channel. A flow rate of the circulated ink is 0.10 to 1.50 times a maximum dischargeable rate of the ink discharge head. A dynamic surface tension A of the ink at 25&#xb0; C. is 34.0 mN/m or less when measured by a maximum bubble pressure method at a surface lifetime of 15 msec, and the dynamic surface tension A and a static surface tension B of the ink at 25&#xb0; C. satisfy the following relation:10.0(%)&#x2264;[()/()]&#xd7;100&#x2264;19.0(%).

Ink discharge device and ink discharge method

An ink includes a coloring material, one or more organic solvents, a resin particle including a structure unit having a carboxyl group and a structure unit having an alkoxysilyl group, and water. The one or more organic solvents includes at least one organic solvent having a solubility parameter of 8.96 to less than 11.8. The ink has a dynamic surface tension A of 34.0 mN/m or less for a surface life of 15 msec at 25 degrees C. according to maximum bubble pressure technique. The dynamic surface tension A and a static surface tension B of the ink at 25 degrees C. satisfy the following relation: 10.0 percent&#x2264;[(A&#x2212;B)/(A+B)]&#xd7;100&#x2264;19.0 percent.

Ink, image forming method, and liquid discharging device

Provided is an ink containing a colorant, an organic solvent, and water, wherein the ink contains as the organic solvent, at least one kind of an organic solvent having a solubility parameter of greater than or equal to 9 but less than 11.8, wherein a content of the organic solvent having a solubility parameter of greater than or equal to 9 but less than 11.8 is greater than or equal to 20% by mass of a total amount of the ink, wherein a dynamic surface tension A of the ink at 25&#xb0; C. at a surface lifetime, measured by a maximum foaming pressure method, of 15 msec is less than or equal to 34.0 mN/m, and wherein the dynamic surface tension A and a static surface tension B of the ink at 25&#xb0; C. satisfy a formula of 10.0%&#x2264;[(A&#x2212;B)/(A+B)]&#xd7;100&#x2264;19.0%.

Ink, ink container, image forming method, image forming apparatus, and image formed matter

Provided is a toner including at least: a binder resin; and a release agent, wherein in a transmission electron microscopic (TEM) image of a torn cross-section of the toner, the release agent has an acicular or filiform shape and an average aspect ratio of 31 or greater, and wherein a displacement amount of the toner when 250 micronewtons is applied to the toner in a microcompression test is 700 nm or less.

Toner, toner stored unit, and image forming apparatus

An ink discharge device including an ink, an ink discharge head, and a negative pressure generator is provided. The ink comprises water, a colorant, an organic solvent X having a solubility parameter of from 8.9 to 12.0 and comprising no glycol ether compound, and a copolymer comprising a structural unit represented by the following formula (1): where R1 represents a hydrogen atom or methyl group and Y represents an alkylene group having 2 to 18 carbon atoms. The ink discharge head includes a nozzle to discharge the ink, a plurality of individual liquid chambers in communication with the nozzle, a flow-in channel to let the ink flow into the individual liquid chambers, and a flow-out channel to let the ink flow out from the individual liquid chambers. The negative pressure generator is configured to generate a negative pressure that lets the ink flow out from the individual liquid chambers.

An electrostatic-image developing toner including at least a binder resin; a colorant; and a release agent, wherein an average circularity of particles having a particle diameter in a range of 0.79 times or more but less than 1.15 times as large as a most frequent diameter in a number particle size distribution of the toner is within a range of 1.010 times or more but less than 1.020 times as high as an average circularity of particles having a particle diameter of 1.15 times or more as large as the most frequent diameter.

Toner

A toner including: binder resin; and release agent, wherein the release agent is 1% to 8% by mass to the toner, as equivalent mass of endothermic amount of the release agent determined by DSC, wherein the release agent present in region from surface of the toner to 0.3 &#x3bc;m depth is 0.1% to 4% by mass, as determined by FTIR-ATR, and wherein, in TEM image of torn surface of the toner, WDa&#x3c;WDb&#x3c;WDc is satisfied, WDa denoting number-average-particle-diameter of the release agent in region Aa that is from surface of the toner to depth that is one-sixth of diameter d of the toner (&#x2159;d), WDc denoting number-average-particle-diameter of the release agent in central region Ac that is circular region having center located at center of the toner and radius of &#x2159;d, WDb denoting number-average-particle-diameter of the release agent in region Ab that is other than region Aa or Ac.

Toner, and method for manufacturing toner

A toner is provided. The toner includes a binder resin and a release agent. The release agent has an average aspect ratio of 31 or more, when the average aspect ratio is determined from cross-sectional images of the toner observed with a transmission electron microscope (TEM).

Toner and developer

A toner is provided. The toner includes a binder resin, a colorant, a release agent and an external additive. The toner has an average circularity of from 0.965 to less than 0.985. The toner has BET specific surface area of less than 1.20 m/g after liberation treatment of external additive.

Toner, developer and method of manufacturing toner

A toner is provided. The toner includes a binder resin and a release agent. The toner satisfies the following inequation:0.45&#x2266;(1/2)&#x2266;1.00wherein S1 and S2 represent areas of quadrangles circumscribing the release agent and the toner, respectively, in a cross-sectional image of the toner obtained by a transmission electron microscope (TEM).

Toner, method of manufacturing the toner, developer, and process cartridge

The invention provides a solid polymer fuel cell whose operational stability over time has been enhanced. A reinforced solid polymer electrolyte composite membrane for a solid polymer fuel cell according to the present invention comprises two or more polymer electrolyte membranes and one or more layers of a sheet-like porous reinforcing member, wherein the polymer electrolyte membranes provide both the upper and lower surfaces of the composite membrane, and pores in the sheet-like porous reinforcing member are substantially filled with the electrolyte from the polymer electrolyte membranes, and wherein the sheet-like porous reinforcing member contains a peroxide decomposition catalyst.

Reinforced solid polymer electrolyte composite membrane, membrane electrode assembly for solid polymer fuel cell, and solid polymer fuel cell

Disclosed is a light-transmitting electromagnetic-shielding laminate, which is characterized in that two or more layers including an electromagnetic-shielding layer are arranged in layers using a (meth)acrylate adhesive composition which contains a (meth)acrylate monomer, a (meth)acrylate oligomer and at least one member selected from the group consisting of acrylic amide derivatives, silane compounds and organophosphorus compounds. Also disclosed is a light-transmitting radio wave absorber which is characterized in that a resistive layer, a dielectric spacer and a reflective layer are arranged in layers using a (meth)acrylate adhesive composition which contains a (meth)acrylate monomer, a (meth)acrylate oligomer and at least one member selected from the group consisting of acrylic amide derivatives, silane compounds and organophosphorus compounds.

Light-transmitting electromagnetic-shielding laminate and method for producing the same, light-transmitting radio wave absorber, and adhesive composition

The present invention provides a light-transmitting electromagnetic wave-shielding material for use in displays or in-vehicle panels each having a polarizing plate or a retardation plate, wherein the light-transmitting electromagnetic wave-shielding material undergoes no generation of light interference fringes and is satisfactory in visibility even through sunglasses, goggles, glare-proof panels or glare-proof window materials having polarizing capability. By using unstretched light-transmitting organic polymer materials low in molecular orientation or small in molecular orientation unevenness as the base substrate of an electromagnetic wave-shielding layer, the light-transmitting electromagnetic wave-shielding material excellent in light interference fringe prevention capability can be obtained.

Light-transmitting electromagnetic wave-shielding material

An image forming apparatus including an image bearing member, a charging device, an irradiating device, a developing device, a transfer device, a fixing device, and a cleaning device, wherein the image bearing member includes a substrate on which a photosensitive layer and a cross-linked surface layer are accumulated and the cross-linked surface layer comprises a cross-linked material formed by curing a monomer having at least three radical polymerizable function groups without a charge transport structure and a radical polymerizable compound having a charge transport structure by a photo-energy irradiation device, wherein the toner has a volume average particle diameter of from 1 to 5 &#x3bc;m and an average circularity of from 0.95 to 0.98, wherein external additives added to the toner satisfy the following relationship: 1&#x3c;3X/5+Y&#x3c;3, wherein X represents the amount of an external additive having a primary particle diameter of from 10 to 20 nm and Y represents the amount of another external additive having an primary particle diameter of from 100 to 200 nm and X and Y satisfy the following relationship: X&#x3c;Y, 0&#x3c;X&#x2266;1 and 1&#x2266;Y, and wherein the cleaning device includes a cleaning blade made of a polyurethane rubber plate having a hardness of from 70 to 80&#xb0;, and a rebound resilience of from 10 to 35% at 25&#xb0; C.

Image forming apparatus, image forming method and process cartridge

Growing community of inventors

Shizuoka, Japan

Masahiko Ishikawa