Seiko Epson Corporation

Seiko Epson Kabushiki Kaisha

Hiroshi Mukai

Katsuko Aoki

Takayoshi Kagata

Masahiro Yatake

Akira Mizutani

Toshihiro Shinbara

Yoshio Shionozaki

Kenichi Kato

Chiyoshige Nakazawa

Shuhei Yamada

Masako Fukuda

Tsuyoshi Obikawa

Youichi Kubomura

Kiyohiko Takemoto

Hiroki Nakane

Hironori Sato

Keiji Matsumoto

Kazuhiko Sato

Hiroshi Ito

Hidehiko Komatsu

Tomohiro Sayama

Hitoshi Ohta

Takashi Koase

Keiichiro Yoshino

Masato Murayama

Shoki Kasahara

Keiichi Mukaiyama

Kenji Kitada

Akira Shinoto

Toshihiko Wakabayashi

Nagatoshi Kasahara

Yoshiko Azami

Rei Miyazaki

Masako Fukada

Kiyohito Takemoto

An ink jet recording apparatus includes a recording head having a plurality of nozzles through which an ink composition containing an inorganic pigment is ejected, a nozzle surface having nozzle orifices, and a liquid-repellent film disposed on the nozzle surface; an absorbing member that absorbs the ink composition containing the inorganic pigment from the nozzle orifices and the nozzle surface; and an actuating mechanism including a pressing member that presses the absorbing member and the nozzle surface relative to each other. The actuating mechanism moves at least one of the absorbing member and the recording head relative to the other to perform a cleaning operation in which the ink composition is removed from the nozzle surface with the absorbing member. The absorbing member contains an impregnation liquid having a surface tension of 45 mN/m or less during the cleaning operation.

Ink jet recording apparatus

An ink composition that performs recording by being attached on a heated non-absorbent recording medium or a heated low absorbency recording medium, the ink composition including a pigment; a core polymer and a shell polymer that covers at least a portion of the core polymer, and polymer particles in which the glass transition point of the polymer that configures the core polymer is more than 10&#xb0; C. lower than the glass transition point of the polymer that configures the shell polymer, and in which the polymer that configures the shell polymer includes a polymer having a (meth)acrylate monomer unit and a carboxylic acid monomer unit, and the content of the polymer particles is 3.0 mass % or more with respect to the total amount of the ink composition.

Ink composition, ink set, and recording method

An ink composition includes a color material, water, and polymer particles, in which the polymer particle has a core-shell structure having a core polymer and a shell polymer, a glass transition temperature of the core polymer is 30&#xb0; C. or higher, a glass transition temperature of the shell polymer is 50&#xb0; C. or higher, the glass transition temperature of the shell polymer is more than 10&#xb0; C. higher than the glass transition temperature of the core polymer, and the core polymer includes an aromatic monomer as a constituent unit and does not substantially include an alkyl polyol having a standard boiling point of 280&#xb0; C. or higher.

Ink composition and recording apparatus

An ink composition includes a pigment; polymer particles; and a polar solvent with a boiling point of 150&#xb0; C. or higher, in which the polymer particles include a core polymer and a shell polymer that covers at least a portion of the core polymer, a glass transition point of the polymer that configures the core polymer is more than 30&#xb0; C. lower than the glass transition point of the polymer that configures the shell polymer, the polymer that configures the shell polymer includes a polymer having a (meth)acrylate monomer unit and a carboxylic acid monomer unit, the content (solid content conversion) of the polymer particles is 1.0 mass % to 10 mass % with respect to the total amount of the ink composition, and the content of the polar solvent is 10 mass % to 40 mass % of the total amount of the ink composition.

Ink composition and recording method

There is provided an ink jet ink composition, which is used in a recording method including ejecting the ink jet ink composition from a recording head of head temperature C (unit: &#xb0; C.) onto a recording medium to adhere the ink jet ink composition thereonto and drying the recording medium, on which the ink jet ink composition is adhered, at drying temperature D (unit: &#xb0; C.), including water; and a polymer particle, in which the polymer particle has a core polymer containing a polymer of glass transition temperature A (unit: &#xb0; C.) and a shell polymer containing a polymer of glass transition temperature B (unit: &#xb0; C.) and formed on the surface of the core polymer, and in which the A, B, C, and D satisfy predetermined relations.

Ink jet ink composition, recording method, and recording apparatus

An ink set includes a recording ink and a displacement ink. The recording ink contains a pigment, a resin, water, and a first surfactant and is substantially free of alkyl polyols with a normal boiling point of 280&#xb0; C. or more. The displacement ink contains water, a second surfactant, an aprotic polar solvent, and an alkyl polyol with a normal boiling point of 280&#xb0; C. or more. Each of the first surfactant and the second surfactant includes a silicone surfactant and/or a fluorosurfactant. The resin includes a water-soluble resin and/or a resin emulsion. The recording ink has a higher surface tension than that of the displacement ink.

Ink set for ink jet recording, and recording apparatus

Disclosed herein is an ink composition, including: a color material; water; and a polymer particle, in which the polymer particle has a core-shell structure including a core polymer and a shell polymer, in which the polymer particle has an average particle diameter of 10 nm to 80 nm, in which the core polymer has a glass transition temperature of lower than 60&#xb0; C. and the shell polymer has a glass transition temperature of higher than or equal to 60&#xb0; C., and in which the core polymer includes an aromatic monomer having at least a vinyl group as a constitutional unit.

An ink composition contains a pigment, first wax particles, second wax particles, and a resin emulsion, in which the first wax particles have a melting point of 120&#xb0; C. or higher and 170&#xb0; C. or lower, the second wax particles have a melting point of 70&#xb0; C. or higher and less than 120&#xb0; C., the resin emulsion has a glass transition point of 50&#xb0; C. or higher and 150&#xb0; C. or lower, the first wax particles contain one or more kinds of wax particles selected from the group consisting of polyethylene wax particles or polypropylene wax particles, and the second wax particles contain one or more kinds of wax particles selected from the group consisting of polyethylene wax particles.

Ink composition and ink jet recording method

An inkjet recording method for printing by ejecting droplets of a water-based ink composition onto a recording medium having a recording surface which is a plastic film and by causing the droplets to adhere to the recording surface, including: using, as the water-based ink composition, a water-based ink composition including at least colorant, between 0.1 wt % and 1.5 wt % of a silicon-based surfactant, alkanediol, pyrrolidone derivative, thermoplastic resin, and water; and heating the water-based ink composition that has adhered to the recording surface to a temperature of 40&#xb0; C. or higher.

Inkjet recording method

This invention provides a treatment liquid for an ink jet recording medium having a recording face of a plastic film, wherein the treatment liquid including at least a specific cyclic ester compound or a specific cyclic amide compound, a primer liquid for printing, and an ink composition. According to the present invention, a plastic recorded matter possessing excellent adhesion and waterfastness can be formed on a recording medium having a recording face of a plastic film.

Treatment liquid for plastic film, primer liquid for printing, ink composition, and method for ink jet recording using them

An ink jet recording method using ink selected from a group including (A) black ink containing black pigment, (B) mixed color black ink containing black and color pigments, and (C) color ink containing color pigment, in which an ink glossiness at 60&#xb0; is increased in the order of black ink (A), mixed color black ink (B), and color ink (C), the target recording surface glossiness at 60&#xb0; in a target recording medium is 40 or more, and at least one of the following is satisfied: (1) A black image is formed using at least a plurality of types of the color ink of (C) and a color image is formed using the color ink of (C), and (2) A black image is formed using the mixed color black ink of (B) and a color image is formed using the color ink of (C).

Ink jet recording method, ink jet recording apparatus, and recorded matter

An ink-jet recording apparatus includes a recording head having a plurality of nozzles through which an ink composition containing an inorganic pigment is ejected, a nozzle surface having nozzle orifices, and a liquid-repellent film disposed on the nozzle surface; an absorbing member that absorbs the ink composition from the nozzle orifices and the nozzle surface; and an actuating mechanism including a pressing member that presses the absorbing member and the nozzle surface relative to each other with a force of 50 to 500 gf. The actuating mechanism moves at least one of the absorbing member and the recording head relative to the other to perform a cleaning operation in which the ink composition is removed from the nozzle surface with the absorbing member. The absorbing member contains an impregnation liquid during the cleaning operation.

Ink-jet recording apparatus

Growing community of inventors

Shiojiri, Japan

Hiroshi Mukai