公开(公告)号：US20180265724A1

公开(公告)日：2018-09-20

申请号：US15887400

申请日：2018-02-02

Applicant: Seiko Epson Corporation

Inventor： Yusuke MIZUTAKI ,  Tomohito NAKANO

IPC: C09D11/36 ,  C09D11/322

CPC classification number: C09D11/36 ,  C09D11/322 ,  C09D11/38

Abstract: An aqueous ink jet ink composition contains a pigment in which the half width of the maximum peak or a peak comparable thereto in an X-ray diffraction spectrum is 0.7° or less and the average value of major axis/minor axis length ratios is 1.7 or less; and an organic solvent A which is one or more selected from the group consisting of alkanediols (1) containing an alkyl skeleton having a branched structure and alkylene glycol alkyl ethers (2) containing at least any one of alkylene glycol containing an alkyl skeleton having a branched structure and an ether of an alkyl group having a branched structure, and which has a normal boiling point of 225° C. or more.

公开(公告)号：US20240075743A1

公开(公告)日：2024-03-07

申请号：US18458578

申请日：2023-08-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Miki UCHIDA ,  Yusuke MIZUTAKI ,  Yuko HISHIDA ,  Hiromichi TAKANASHI ,  Tomohiro KAWASAKI

IPC: B41J2/165 ,  C09D11/322

CPC classification number: B41J2/16552 ,  C09D11/322 ,  B41J2002/16558

Abstract: A water-based maintenance liquid is used for a recording apparatus, the recording apparatus is an apparatus to perform recording by ejecting at least two types of water-based ink compositions from an ink jet head, the ink jet head has a nozzle surface in which nozzles to eject the water-based ink compositions are formed, the nozzles are formed in the nozzle surface respectively for the at least two types of water-based ink compositions, the maintenance liquid is used to moisturize the nozzle surface by being supplied to a cap portion which covers the nozzle surface and includes water and a moisturizing agent component which contains at least one type of moisturizing agent, the moisturizing agent component is a water-soluble organic compound, and a content A (percent by mass) of the moisturizing agent component with respect to a total mass of the moisturizing agent component and the water satisfies a predetermined equation.

公开(公告)号：US20240066874A1

公开(公告)日：2024-02-29

申请号：US18456697

申请日：2023-08-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuko HISHIDA ,  Miki UCHIDA ,  Yusuke MIZUTAKI ,  Hiromichi TAKANASHI ,  Tomohiro KAWASAKI

IPC: B41J2/165 ,  C09D11/322 ,  C11D3/00 ,  C11D3/20 ,  C11D3/43

CPC classification number: B41J2/16552 ,  B41J2/16535 ,  C09D11/322 ,  C11D3/0047 ,  C11D3/2082 ,  C11D3/43 ,  B41J2002/16558

Abstract: A maintenance liquid is used to maintain an ink jet head of a printing apparatus configured to eject an ink for printing from the ink jet head. The maintenance liquid is aqueous and subject to detection by a conductivity-based sensor. The maintenance liquid includes at least one selected from the group consisting of inorganic alkalis and ethylenediaminetetraacetic acid compounds and at least one selected from the group consisting of organic acids and organic alkalis. The maintenance liquid has an electrical conductivity of 100 μS/cm or more and a pH of 6.0 to 11.

公开(公告)号：US20230294405A1

公开(公告)日：2023-09-21

申请号：US18183409

申请日：2023-03-14

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuko HISHIDA ,  Yusuke MIZUTAKI ,  Miki UCHIDA

IPC: B41J2/155 ,  B41J2/21

CPC classification number: B41J2/155 ,  B41J2/2107 ,  B41J2002/14467

Abstract: A recording method comprises a discharging step of discharging a first ink and a second ink from a line head having a length equal to or longer than a recording width of a recording medium and allowing the inks to adhere to the recording medium, wherein the line head includes a plurality of unit heads aligned in the recording width direction of the recording medium and includes portions having different inter-nozzle distances in the scanning direction of a first nozzle that discharges the first ink and a second nozzle that discharges the second ink, and the first ink and the second ink contain color materials and inorganic oxide particles, and the color materials have compositions different from each other.

公开(公告)号：US20210222019A1

公开(公告)日：2021-07-22

申请号：US17154034

申请日：2021-01-21

Applicant: Seiko Epson Corporation

Inventor： Yusuke MIZUTAKI ,  Mitsuaki KOSAKA

IPC: C09D11/326 ,  C09D11/033 ,  B41J2/14 ,  B41M5/00

Abstract: An aqueous ink jet ink composition according to the present embodiment is an aqueous ink jet ink composition for use in an ink jet recording method that includes ejecting ink from an ink jet head. The ink jet head includes nozzles that have a side wall surface, and the side wall surface has a scalloped shape in which a scallop width S1 and a notch depth S2 satisfy S1/S2≥4. The aqueous ink jet ink composition includes a self-dispersed pigment and a solvent that includes a compound represented by formula (1) below. R1—O—R2—OH  (1) In formula (1), R1 represents a hydrogen atom, a methyl group, or an ethyl group, and R2 represents a divalent saturated hydrocarbon group having 5 or fewer carbon atoms or represents a group represented by formula (2) below. R3—O—R4  (2) In formula (2), R3 and R4 each independently represent a divalent saturated hydrocarbon group having 2 or 3 carbon atoms.

公开(公告)号：US20190276693A1

公开(公告)日：2019-09-12

申请号：US16293921

申请日：2019-03-06

Applicant: Seiko Epson Corporation

Inventor： Kunihiro FUJITA ,  Takuya TAKAHASHI ,  Yusuke MIZUTAKI

IPC: C09D11/322 ,  B41M5/00 ,  C09D11/037 ,  C09D11/033 ,  C09D11/107 ,  C09D11/102

Abstract: Provided is an ink-jet ink composition for a pressure-adhesion recording target medium. The ink-jet ink composition contains a pigment, a resin, an organic solvent, a surfactant, and water.

公开(公告)号：US20180362788A1

公开(公告)日：2018-12-20

申请号：US16008152

申请日：2018-06-14

Applicant: Seiko Epson Corporation

Inventor： Keisuke MORITA ,  Yusuke MIZUTAKI ,  Tomohito NAKANO

IPC: C09D11/326 ,  C09D11/037 ,  C09D11/033 ,  C09D11/107 ,  B41J2/14

Abstract: An ink composition includes 3-methyl-1,5-pentanediol; trimethylolpropane; water; and a pigment, in which no more than 0.5% by mass of 1,2-hexanediol is contained, and a mass ratio of the trimethylolpropane to the 3-methyl-1,5-pentanediol is 0.12 or more and 2 or less.

公开(公告)号：US20170037272A1

公开(公告)日：2017-02-09

申请号：US15211260

申请日：2016-07-15

Applicant: Seiko Epson Corporation

Inventor： Tomohito NAKANO ,  Yusuke MIZUTAKI ,  Toru MIYAMOTO ,  Tsuyoshi SANO

IPC: C09D11/54 ,  C09D11/324 ,  C09D11/38 ,  B41J2/01 ,  C09D11/037 ,  C09D11/023 ,  C09D11/107 ,  C09D11/40 ,  C09D11/106

CPC classification number: C09D11/107 ,  C09D11/106 ,  C09D11/324 ,  C09D11/40

Abstract: An ink set includes a first black ink which includes water, less than 0.3 mass % of carbon black, and a resin, in which a solid content in the ink is 20 times or more a content of the carbon black; a second black ink which includes water, 0.3 mass % or more and less than 0.6 mass % of carbon black, and a resin, in which a solid content in the ink is 10 times or more a content of the carbon black; a third black ink which includes water, 0.6 mass % or more and less than 1.5 mass % of carbon black, and a resin, in which a solid content in the ink is twice or more a content of the carbon black; and a fourth black ink which includes water, 1.5 mass % to 10 mass % of carbon black, and a resin.

Abstract translation: 油墨组包括第一黑色油墨，其包含小于0.3质量％的炭黑的水和其中油墨中的固体含量为炭黑含量的20倍或更多的树脂; 包含0.3质量％以上且小于0.6质量％的炭黑的水的第二黑色油墨和其中油墨中的固体成分为碳黑含量的10倍以上的树脂; 包含0.6质量％以上且小于1.5质量％的炭黑的水的第三黑色油墨，以及油墨中的固体成分为碳黑含量的2倍以上的树脂; 以及包含水，1.5质量％〜10质量％的炭黑和树脂的第四黑色油墨。

公开(公告)号：US20240318022A1

公开(公告)日：2024-09-26

申请号：US18613316

申请日：2024-03-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Akinobu SUMIYOSHI ,  Kenta UCHIDA ,  Yusuke MIZUTAKI

IPC: C09D11/38 ,  B41J2/01 ,  C09D11/322

CPC classification number: C09D11/38 ,  C09D11/322 ,  B41J2/01

Abstract: Provided is an aqueous ink jet ink composition including a self-dispersing pigment, a water-soluble resin, and a betaine, in which the self-dispersing resin is a self-dispersing resin obtained by introducing a phosphorus-containing group to the pigment, the water-soluble resin has an acid value of 250 mgKOH/g or greater and 600 mgKOH/g or less, a content of the self-dispersing pigment is 3.5% by mass or greater and 8.5% by mass or less with respect to a total mass of the ink composition, a mass ratio (self-dispersing pigment/water-soluble resin) of the self-dispersing pigment to the water-soluble resin is 2.8 or greater and less than 30, and a content of the betaine is 2.5% by mass or greater and 9.5% by mass or less with respect to the total mass of the ink composition.

公开(公告)号：US20220098430A1

公开(公告)日：2022-03-31

申请号：US17488670

申请日：2021-09-29

Applicant: Seiko Epson Corporation

Inventor： Tomoki MARUYAMA ,  Yusuke MIZUTAKI

IPC: C09D11/40 ,  C09D11/328 ,  C09D11/033 ,  C08K5/053

Abstract: An ink set includes a process color ink set including a yellow ink, a magenta ink, a cyan ink, and a black ink as process color inks, and a light ink having a color similar to a corresponding one of the process color inks in the process color ink set. The yellow ink has a maximum absorption wavelength in a range from 350 nm to 480 nm, the magenta ink has a maximum absorption wavelength in a range from 510 nm to 560 nm, the cyan ink has a maximum absorption wavelength in a range from 580 nm to 700 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the yellow ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the magenta ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the cyan ink is in a range from 118 nm to 165 nm. A maximum absorbance in a visible light wavelength range of the light ink is 70% or less of a maximum absorbance in the visible light wavelength range of the corresponding one of the process color inks.