Aqueous gravure printing ink
AssigneeKao Corporation
InventorsYuki Ozaki, Yasufumi Ueda, Ryuma Mizushima, Takuto Matsuzono
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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.
Claims13
An aqueous gravure ink comprising a pigment, a water-soluble organic solvent, a surfactant and water, in which:
- the water-soluble organic solvent comprises a glycol ether having a boiling point of not lower than 100° C. and not higher than 260° C.;
- the surfactant comprises a silicone-based surfactant comprising a constitutional unit represented by the following formula (1);
- a content of the water-soluble organic solvent in the ink is not less than 1% by mass and not more than 10% by mass;
- and
- a content of water in the ink is not less than 50% by mass and not more than 80% by mass,
- wherein m and n are numbers of respective structural units;
- a is an integer of not less than 0 and not more than 40;
- b is an integer of not less than 1 and not more than 40;
- R is a hydrogen atom or an alkyl group;
- and a ratio of [(a+b)/(m/n)] is not less than 1.60 and not more than 4.5.
Dependencies are inferred from the claim text.