Ricoh Company, Ltd.

Shizuoka University

Kazumi Ohtaki

Hitoshi Iwatsuki

Nozomu Tamoto

Yasuo Suzuki

Mitsuru Naruse

Yasuyuki Yamashita

Masami Tomita

Yoshihiro Nomura

Noriaki Ide

Hiroshi Yamashita

Satoru Inoue

Takayuki Shimizu

Shinichiro Yagi

Toshiki Nanya

Yasuo Asahina

Hiroyuki Fushimi

Shigenori Yaguchi

Takuya Saito

Takeo Yamaguchi

Teruki Kusahara

Yoshikazu Kaneko

Hachiro Tosaka

Takeshi Sako

Motoi Orihara

Hiroshi Sakamoto

Yoshihiro Suguro

Shunichi Chiba

Kenkichi Muto

Idzumi Okajima

Takayuki Hoshina

Masaki Takatsugi

A material set for manufacturing a glass object includes a powder material including glass and a first water soluble resin; and a liquid material including water and a second water soluble resin having a mass average molecular weight of less than 50,000.

Material set for manufacturing glass object, liquid material for manufacturing glass object, method of manufacturing glass object, glass object, and device for manufacturing glass object

A powder material for three-dimensional modeling includes a base particle and a resin including a first water soluble resin and a second water soluble resin, wherein a first aqueous solution of the first water soluble resin having a concentration of two percent by mass has a thermally reversible sol-gel phase transition and is gelated at temperatures higher than a first phase transition temperature of the first aqueous solution.

Powder material for three-dimensional modeling, material set for 3D modeling, method of manufacturing three-dimensional object, device for manufacturing three-dimensional object, and three-dimensional object

A powder material for three-dimensional modeling includes a base particle and a resin covering the base particle, wherein the resin has a first absorption peak in the range of from 1,141 cmto 1,145 cmand a second absorption peak in the range of from 1,089 cmto 1,093 cmin an infrared absorption spectrum and the intensity ratio of the first absorption peak to the second absorption peak is from 0.40 to 0.70.

Powder material for three dimensional modeling, kit for three dimensional modeling, green body for three dimensional modeling, method of manufacturing three dimensional object, method of manufacturing three-dimensional green body, device for manufacturing three-dimensional object, and device for manufacturing three-dimensional green body

A powder material for three-dimensional modeling includes a base particle and a coverage film including an organic material. The coverage film covers the base particle. The powder material is used for three dimensional modeling and when the coverage film is dissolved in a solvent to prepare a solution and the solution is formed into a coated film on a smooth surface, the coated film has a wetting tension of from 22 mN/m to 28 mN/m.

Powder material for three-dimensional modeling, kit for three-dimensional modeling, device for manufacturing three-dimensional object, and method of manufacturing three-dimensional object

A powder for 3D modeling includes a base particle and a resin having a functional group represented by the following Chemical formula 1, where Arepresents O or NH and R, R, and Reach, independently represent CH, CH, CH, or CH. The base particle is covered with the resin.

Powder for 3D modeling, set for 3D modeling, method of manufacturing 3D object, and device for manufacturing 3D object

A method for regenerating a carrier core material for electrophotography, including: treating a carrier for electrophotography including a carrier core material for electrophotography and a coating layer on a surface of the carrier core material for electrophotography with an aqueous solution including an oxidant in a subcritical state or a supercritical state having a temperature of 280&#xb0; C. or greater and a density of 0.20 g/cmor greater, wherein an amount of the oxidant in a total amount of the aqueous solution used in the treating is greater than 0.05 parts by mass with respect to 1 part by mass of the carrier for electrophotography to be treated in the treating.

Method for regenerating carrier core material for electrophotography, method for manufacturing carrier for electrophotography, and carrier for electrophotography

A method of producing a toner for developing latent electrostatic images is disclosed, which comprises the steps of dispersing resin particles comprising a resin in an organic solvent in which the resin is not dissolved; dissolving a dye in the organic solvent before or after dispersing the resin particles in the organic solvent to prepare a dispersion in which the resin particles and the dye are contained, thereby dying the resin particles with the dye; and removing the organic solvent from the dispersion, wherein the ratio of the solubility [D.sub.1 ] of the dye in the organic solvent to the solubility [D.sub.2 ] of the dye in the resin of the resin particles, [D.sub.1 ]/[D.sub.2 ], is not more than 0.5.

Method of producing toner for developing latent electrostatic images

This invention relates to a color toner for electrophotography containing a coloring agent and a binder resin as the main components, said coloring agent comprising at least one of the anthraquinone derivatives expressed by the following general formula (I), ##STR1## wherein R.sup.1 represents hydrogen or an alkyl group having at least 6 carbon atoms and R.sup.2 represents hydrogen, an alkyl group having at least 6 carbon atoms or phenyl group. This invention further relates to a color toner for electrophotography containing a coloring agent and a binder resin as the main components, in addition to said anthraquinone derivatives of the general formula (I), said coloring agent further comprising at least one of the compounds expressed by the following chemical formulas (II) and (III): ##STR2##

Color toner for electrophotography

This invention relates to a toner for developing an electrostatic latent image, which contains a coloring agent, a binder resin and a charge controlling agent as the main components, said charge controlling agent being a metal salt of salicylic acid or derivatives.

Toner for developing electrostatic latent image

A two-color thermosensitive recording material using leuco dyes is disclosed, which is capable of forming two different colors when heated at different temperatures, black or blackish color at a low temperature and another color at a high temperature, comprising a support material, a high-temperature color-forming material overlaying the support material, a decolorization layer overlaying the high-temperature color-forming layer, and a low-temperature color-forming layer overlaying the decolorization layer, and when necessary, an intermediate layer interposed between the decolorization layer and the low-temperature color-forming layer, the decolorization layer containing an aliphatic amine or a morpholine derivative of the formula of ##STR1## which are fully defined in the specification, and the low-temperature color-forming layer containing as a color developer a thiourea derivatives of the formula, ##STR2## which is fully defined in the specification.

Two-color thermosensitive recording material

Growing community of inventors

Shizuoka, Japan

Kazumi Ohtaki