公开(公告)号：US20190047299A1

公开(公告)日：2019-02-14

申请号：US16077298

申请日：2017-02-02

Applicant: KAO CORPORATION ,  THINK LABORATORY CO., LTD.

Inventor： Yuta MATSUMOTO ,  Ryuma MIZUSHIMA ,  Takahiro SATO ,  Kazuki WATANABE ,  Yasufumi UEDA ,  Tatsuo SHIGETA

IPC: B41J11/00 ,  B41M5/00 ,  B41J2/21

Abstract: The present invention relates to an ink-jet printing method that is capable of obtaining good printed materials that are free of occurrence of color migration and deformation of a printing medium even when printed on a resin printing medium. The present invention provides an ink-jet printing method using a water-based ink containing a black ink, a chromatic ink and a white ink which each contain a pigment (A), an organic solvent (C) having a boiling point of not lower than 90° C. and lower than 250° C., and water, said method including step 1 of ejecting at least one water-based ink selected from the group consisting of the black ink and the chromatic ink onto a transparent resin printing medium to print an image 1 on the printing medium; step 2 of ejecting the white ink onto the resulting image 1 to print a white image that covers the image 1 on the printing medium; and step 3 of heating and drying the resulting printed material from a side of a surface of the printing medium on which the white image is formed, using an infrared heater.

公开(公告)号：US20190134989A1

公开(公告)日：2019-05-09

申请号：US16310771

申请日：2017-06-16

Applicant: KAO CORPORATION

Inventor： Yuta MATSUMOTO ,  Kazuki WATANABE ,  Azusa KURODA

IPC: B41J2/21 ,  C09D11/322 ,  C09D11/38 ,  C09D11/40 ,  C09D11/033

Abstract: The present invention relates to an ink-jet printing method that is capable of obtaining good printed characters or images which are free of occurrence of white lines or streaks irrespective of irradiation with an active energy ray. The present invention provides an ink-jet printing method including the steps of ejecting at least one ink A selected from the group consisting of a black ink and chromatic inks onto a low-liquid absorbing printing medium and then ejecting a white ink thereonto, in which the ink A contains at least one pigment selected from the group consisting of a black pigment and chromatic pigments, and a polymer dispersant containing a constitutional unit derived from a polyalkylene glycol (meth)acrylate; and the white ink contains titanium oxide and a polymer dispersant containing a constitutional unit derived from a polyalkylene glycol (meth)acrylate.

公开(公告)号：US20180311968A1

公开(公告)日：2018-11-01

申请号：US15765969

申请日：2016-09-30

Applicant: KAO CORPORATION

Inventor： Takahiro SATO ,  Kazuki WATANABE ,  Masayuki NARITA

IPC: B41J2/18 ,  B41M5/00 ,  C01G23/047 ,  C09C1/36 ,  C09D11/322

Abstract: The present invention relates to an ink-jet printing method using a water-based ink containing a rutile-type titanium oxide and a polymer dispersant, in which the polymer dispersant contains a constitutional unit derived from an anionic group-containing monomer selected from the group consisting of acrylic acid, methacrylic acid and the like in an amount of not less than 72% by mass; Mw of the polymer dispersant is from 3,000 to 50,000; and a content of the polymer dispersant in the water-based ink is from 1 to 7% by mass on the basis of the titanium oxide, said method including the step 1 of redispersing the water-based ink by a dispersing means and the step 2 of printing characters or images on a printing medium using the redispersed water-based ink. According to the ink-jet printing method of the present invention, even though the titanium oxide is precipitated, it is possible to readily redisperse the titanium oxide in the water-based ink by simple stirring operations, and further by using the water-based ink whose properties can be rapidly restored owing to excellent foam suppressing properties and defoaming properties thereof, it is possible to attain good ejection properties of the ink.

公开(公告)号：US20190264043A1

公开(公告)日：2019-08-29

申请号：US16349195

申请日：2017-11-13

Applicant: KAO CORPORATION

Inventor： Kazuki WATANABE ,  Ryuma MIZUSHIMA ,  Takahiro SATO ,  Yasufumi UEDA

IPC: C09D11/033 ,  C09D11/107

Abstract: The present invention relates to an aqueous gravure ink containing a pigment, a polymer, a water-soluble organic solvent, a surfactant and water, in which the water-soluble organic solvent contains a glycol ether having a boiling point of from 100 to 260° C., and a content of the glycol ether in the ink is from 1 to 10% by mass; a total content of the water-soluble organic solvent in the ink is not more than 15% by mass; the surfactant contains an acetylene glycol-based surfactant; and a content of water in the ink is from 50 to 70% by mass.

公开(公告)号：US20190039384A1

公开(公告)日：2019-02-07

申请号：US16076867

申请日：2017-02-02

Applicant: KAO CORPORATION ,  THINK LABORATORY CO., LTD.

Inventor： Yuta MATSUMOTO ,  Kazuki WATANABE ,  Yasufumi UEDA ,  Tatsuo SHIGETA

IPC: B41J2/21 ,  B41M5/50 ,  C09D11/40 ,  B41J11/00 ,  B41M7/00

Abstract: The present invention relates to an ink-jet printing method that is capable of obtaining good printed materials that are free of occurrence of color migration and deformation of a printing medium even when printed on a transparent resin printing medium using a water-based ink containing a white ink, and a black or chromatic ink. The present invention provides an ink-jet printing method including the step of ejecting a water-based ink onto a printing medium using a printing apparatus to print characters or images on the printing medium, said printing apparatus including an ink-jet printing head that ejects the water-based ink onto the printing medium that is transported in a feeding direction thereof; and an drying mechanism that is disposed on a downstream side in a feeding direction of the printing medium, in which the printing medium is in the form of a transparent resin printing medium, and the water-based ink includes a white ink, and a black or chromatic ink, and in which the drying mechanism blows a superheated steam that is heated to a temperature of 100 to 180° C. onto at least one of a printing surface and an opposite surface of the printing medium.

公开(公告)号：US20190039373A1

公开(公告)日：2019-02-07

申请号：US16077159

申请日：2017-02-02

Applicant: KAO CORPORATION ,  THINK LABORATORY CO., LTD.

Inventor： Yuta MATSUMOTO ,  Kazuki WATANABE ,  Yasufumi UEDA ,  Tatsuo SHIGETA

IPC: B41J2/135 ,  B41J11/02 ,  B41M5/00 ,  C09D11/322 ,  C09D11/40

Abstract: The present invention relates to an ink-jet printing apparatus that is capable of obtaining printed materials that are free of occurrence of color migration and have good appearance even when printed on a resin printing medium using a water-based ink, and an ink-jet printing method. The present invention provides an ink-jet printing apparatus including an ink-jet printing head that ejects a water-based ink onto a resin printing medium that is transported in a feeding direction thereof, and an under heater that heats the printing medium from a rear side surface of the printing medium opposed to a front side surface thereof which faces to the ink-jet printing head, in which the under heater is disposed at a position spaced at a distance of from 0.05 to 3.0 mm apart from the rear side surface of the printing medium upon printing, and an ink-jet printing method using the ink-jet printing apparatus.

公开(公告)号：US20180215935A1

公开(公告)日：2018-08-02

申请号：US15752708

申请日：2016-08-12

Applicant: KAO CORPORATION

Inventor： Tomoaki II ,  Masayuki NARITA ,  Kazuki WATANABE

IPC: C09D11/322

Abstract: The present invention relates to [1] a water-based ink for ink-jet printing containing titanium oxide (A) and a pigment dispersant (B), in which the pigment dispersant (B) contains a constitutional unit derived from an anionic group-containing monomer (a) and a constitutional unit derived from a polyalkylene glycol (meth)acrylate (b); an average molar number of addition of an alkyleneoxide in the polyalkylene glycol (meth)acrylate (b) is from 15 to 100; an acid value of the pigment dispersant (B) is from 100 to 400 mgKOH/g; and a content of the pigment dispersant (B) in the water-based ink is from 0.3 to 18 parts by mass on the basis of 100 parts by mass of the titanium oxide (A), and [2] an ink-jet printing method of ejecting the water-based ink described in the above item [1] onto a printing medium using an ink-jet printing apparatus to print characters or images on the printing medium. According to the present invention, there are provided a water-based ink for ink-jet printing which contains titanium oxide as a pigment, and is excellent in redispersibility, and an ink-jet printing method.