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    Inkjet recording medium and inkjet recording method
    1.
    发明授权
    Inkjet recording medium and inkjet recording method 有权

    公开(公告)号：US10549565B2

    公开(公告)日：2020-02-04

    申请号：US16076471

    申请日：2016-09-28

    Applicant: Nippon Paper Industries Co., Ltd. ,  Kao Corporation

    Inventor： Koji Kutsuwa ,  Yasufumi Ueda ,  Takayuki Suzuki

    IPC: B41M5/50 ,  C09D11/322 ,  B41M5/52 ,  B41J2/01 ,  B41J2/07 ,  B41J2/16 ,  C09D11/38

    Abstract: An inkjet recording medium having an ink receiving layer containing an inorganic pigment, starch, and copolymer latex on at least one surface of a base, characterized in that the inorganic pigment contains engineered calcium carbonate and kaolin, an amount of the engineered calcium carbonate is from 50% by weight or more to less than 80% by weight and an amount of the kaolin is from 10% by weight or more to less than 50% by weight with respect to a total amount of the inorganic pigment, and from 1 parts by weight or more to 10 parts by weight or less of an organic pigment having a glass transition temperature (Tg) of 20° C. or more is contained in the ink receiving layer with respect to 100 parts by weight of the inorganic pigment.

    Water-based ink
    3.
    发明授权
    Water-based ink 有权

    公开(公告)号：US10316207B2

    公开(公告)日：2019-06-11

    申请号：US15539370

    申请日：2015-12-16

    Applicant: KAO CORPORATION

    Inventor： Kaname Mitsuyoshi ,  Hirotaka Takeno ,  Takayuki Suzuki ,  Takahiro Yoshikawa

    IPC: B41J2/01 ,  C09D11/38 ,  B41M5/00 ,  C09D11/324

    Abstract: The present invention relates to a water-based ink that exhibits excellent ejection properties, and can be prevented from suffering from reduction in a dot size of the ink during a drying step thereof even when printed on a low-water absorbing recording medium, and is capable of obtaining printed characters or images having excellent uniformity, as well as an ink-jet printing method using the water-based ink. The water-based ink includes a pigment, a water-insoluble polymer, an acetylene glycol-based nonionic surfactant (A) having HLB of not less than 0 and not more than 5, a nonionic surfactant (B) having HLB of not less than 6 and not more than 20, a polyether-modified silicone (C) having a kinematic viscosity of not less than 30 mm2/s and not more than 190 mm2/s as measured at 25° C. and an organic solvent (D), in which a weighted mean value of a boiling point of the organic solvent (D) is not lower than 150° C. and not higher than 230° C.

    Cleaning liquid for aqueous ink comprising an acetylene glycol-based surfactant
    4.
    发明授权
    Cleaning liquid for aqueous ink comprising an acetylene glycol-based surfactant 有权

    公开(公告)号：US11319507B2

    公开(公告)日：2022-05-03

    申请号：US16473494

    申请日：2017-12-26

    Applicant: KAO CORPORATION

    Inventor： Takayuki Suzuki ,  Yasufumi Ueda

    IPC: C11D1/72 ,  B41J2/165 ,  C11D3/20 ,  C11D3/43 ,  C11D11/00 ,  C11D17/00

    Abstract: The present invention relates to a cleaning liquid for a water-based ink that contains a pigment and a water-insoluble polymer, said cleaning liquid containing (A) an acetylene glycol having an average molar number of addition of EO of 0 to 2 mol, (B) at least one compound selected from the group consisting of an acetylene glycol having an average molar number of addition of EO of not less than 4 mol and a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms, (C) a water-soluble organic solvent and water, in which the water-soluble organic solvent (C) contains at least one water-soluble organic solvent having a boiling point of not lower than 90° C.; a boiling point of the water-soluble organic solvent (C) is not higher than 250° C. in terms of a weighted mean value thereof; and a content of the water-soluble organic solvent (C) in the cleaning liquid is not more than 20% by mass; a process for producing the cleaning liquid; and a method of cleaning a water-based ink using the cleaning liquid.

    Cleaning liquid for aqueous ink
    5.
    发明授权
    Cleaning liquid for aqueous ink 有权

    公开(公告)号：US10981385B2

    公开(公告)日：2021-04-20

    申请号：US16473398

    申请日：2017-12-26

    Applicant: KAO CORPORATION

    Inventor： Takayuki Suzuki ,  Hirotaka Takeno

    IPC: B41J2/165 ,  C11D3/37 ,  C11D3/40 ,  C11D3/43

    Abstract: The present invention relates to a cleaning liquid for a water-based ink that contains a pigment and a water-insoluble polymer, said cleaning liquid containing (A) a surfactant, (B) a water-soluble organic solvent containing (b-1) diethylene glycol monoisopropyl ether, and water, in which the surfactant (A) contains at least one compound selected from the group consisting of (a-1) an acetylene glycol or an ethyleneoxide adduct of the acetylene glycol, and (a-2) a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms or a polyethylene glycol aryl ether containing an aryl group having not less than 6 carbon atoms, and a content of the water-soluble organic solvent (B) in the cleaning liquid is from 5 to 30% by mass; and a method of cleaning a water-based ink using the cleaning liquid.

    INKJET RECORDING MEDIUM AND INKJET RECORDING METHOD
    7.
    发明申请
    INKJET RECORDING MEDIUM AND INKJET RECORDING METHOD 审中-公开

    公开(公告)号：US20190047308A1

    公开(公告)日：2019-02-14

    申请号：US16076471

    申请日：2016-09-28

    Applicant: Nippon Paper Industries Co., Ltd. ,  Kao Corporation

    Inventor： Koji Kutsuwa ,  Yasufumi Ueda ,  Takayuki Suzuki

    IPC: B41M5/50 ,  C09D11/322 ,  C09D11/38 ,  B41J2/16 ,  B41M5/52

    Abstract: An inkjet recording medium having an ink receiving layer containing an inorganic pigment, starch, and copolymer latex on at least one surface of a base, characterized in that the inorganic pigment contains engineered calcium carbonate and kaolin, an amount of the engineered calcium carbonate is from 50% by weight or more to less than 80% by weight and an amount of the kaolin is from 10% by weight or more to less than 50% by weight with respect to a total amount of the inorganic pigment, and from 1 parts by weight or more to 10 parts by weight or less of an organic pigment having a glass transition temperature (Tg) of 20° C. or more is contained in the ink receiving layer with respect to 100 parts by weight of the inorganic pigment.

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