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    Pigment Printing Ink Jet Ink Composition And Ink Jet Recording Method
    1.
    发明公开
    Pigment Printing Ink Jet Ink Composition And Ink Jet Recording Method 审中-公开

    公开(公告)号：US20240158655A1

    公开(公告)日：2024-05-16

    申请号：US18505580

    申请日：2023-11-09

    申请人： SEIKO EPSON CORPORATION

    发明人： Tasuku NAKAMURA ,  Kenta UCHIDA ,  Akiko YAMADA

    IPC分类号： C09D11/324 ,  C09D11/54

    CPC分类号： C09D11/324 ,  C09D11/54

    摘要： A pigment printing ink jet ink composition according to one embodiment of the present disclosure includes a self-dispersible black pigment having a specific surface area of 50 m2/g or more calculated from a measurement by a pulse NMR at 30° C., a metal alkali, a water-soluble organic solvent, and water, and in the ink composition described above, a content of the self-dispersible black pigment with respect to a content of the metal alkali is 13 to 40 in terms of a composition ratio, the water-soluble organic solvent includes a compound having an SP value of 11 or more, and the water-soluble organic solvent includes no compound having an SP value of less than 11 at a content of more than 0.3 percent by mass with respect to a total mass of the ink composition.

    Ink Jet Printing Apparatus And Maintenance Method
    2.
    发明申请
    Ink Jet Printing Apparatus And Maintenance Method 有权

    公开(公告)号：US20210283916A1

    公开(公告)日：2021-09-16

    申请号：US17195853

    申请日：2021-03-09

    申请人： Seiko Epson Corporation

    发明人： Tasuku NAKAMURA ,  Hideki OKADA

    IPC分类号： B41J2/165 ,  C09D11/30

    摘要： An ink jet printing apparatus includes a printing head that has a nozzle face and a nozzle having an ejection opening defined in the nozzle face and through which an ink composition is ejected, and a pressure cleaning mechanism configured to apply a pressure to an interior of the printing head to discharge the ink composition from the nozzle for cleaning. The ink composition contains resin particles having a glass transition temperature of −30° C. to 50° C., an organic solvent having a normal boiling point of 280° C. or more, at least one of organic and inorganic alkalis, and at least one of betaines and polyhydric alcohols being solid at room temperature.

    INK RECEPTACLE
    4.
    发明申请
    INK RECEPTACLE 审中-公开

    公开(公告)号：US20200238716A1

    公开(公告)日：2020-07-30

    申请号：US16751244

    申请日：2020-01-24

    申请人： Seiko Epson Corporation

    发明人： Hideki OKADA ,  Kosuke CHIDATE ,  Tasuku NAKAMURA

    IPC分类号： B41J2/175 ,  C09D11/322 ,  C09D11/324 ,  C09D11/38

    摘要： An ink receptacle includes an inner bag filled with an aqueous ink jet ink and a pliable sheath containing the inner bag. The inner bag contains a gas phase in a volume fraction of 0.001 or more relative to the capacity of the inner bag. The aqueous ink jet ink contains a dispersed component, an acetylene glycol surfactant having an HLB of 11 or more, and an acetylene glycol surfactant having an HLB of 9 or less.