公开(公告)号：US11254828B2

公开(公告)日：2022-02-22

申请号：US16957262

申请日：2018-12-27

Applicant: KAO CORPORATION

Inventor： Ryuma Mizushima ,  Kazuki Watanabe ,  Yuki Ozaki ,  Takuto Matsuzono ,  Yasufumi Ueda

IPC: C09D11/037 ,  B41M1/10 ,  B41F9/10

Abstract: The present invention relates to a gravure printing method of conducting printing on a printing substrate with an aqueous ink reserved in an ink pan using a furnisher roll, a gravure roll, a doctor blade and a nip roll, in which the aqueous ink contains a pigment, a polymer, an organic solvent, a surfactant and water; a content of organic solvent components of the organic solvent which have a boiling point of 100 to 260° C. in the aqueous ink is not less than 0.3% by mass and not more than 12% by mass; an average particle size of particles of the pigment is from 120 to 350 nm; and an arithmetic mean roughness (Ra) of a plate surface of the gravure roll is from 10 to 140 nm. According to the present invention, it is possible to improve transfer properties of the ink to the printing substrate such as a resin film, etc., and suppress fogging on the plate surface.

公开(公告)号：US11952500B2

公开(公告)日：2024-04-09

申请号：US16972419

申请日：2019-04-02

Applicant: KAO CORPORATION

Inventor： Yuki Ozaki ,  Yasufumi Ueda ,  Ryuma Mizushima ,  Takuto Matsuzono

IPC: C09D11/037 ,  C09D11/107 ,  C09D11/108 ,  C08K5/23

CPC classification number: C09D11/037 ,  C09D11/107 ,  C09D11/108 ,  C08K5/23

Abstract: The present invention relates to an aqueous gravure ink containing a pigment, 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 100 to 260° C.; the surfactant contains a silicone-based surfactant containing a specific constitutional unit; a content of the water-soluble organic solvent in the ink is 1 to 10% by mass; and a content of water in the ink is 50 to 80% by mass. This ink exhibits a less burden on the environments, and is excellent in optical density and drying properties.