Aqueous ink, ink cartridge, and ink jet recording method
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United States of America Patent
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Nov 7, 2017
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app pub date -
Jan 12, 2016
filing date -
Jan 23, 2015
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Abstract
An aqueous ink for ink jet including a pigment; a water-soluble resin for dispersing the pigment; a water-soluble organic solvent; an acetyleneglycol type surfactant; and a fluorinated surfactant. The acetyleneglycol type surfactant includes an acetyleneglycol ethylene oxide adduct having an HLB value determined by Griffin's method of 10 or more. The fluorinated surfactant includes a perfluoroalkyl ethylene oxide adduct having a perfluoroalkyl group with six or less carbon atoms. The water-soluble organic solvent has a dielectric constant at 25° C. of 20.0-30.0. The content of the water-soluble organic solvent relative to the content of the fluorinated surfactant based on the total mass of the ink is 100-200 times in terms of mass ratio. The aqueous ink has a dynamic surface tension γ10 at a lifetime of 10 ms of 40 mN/m or less and a static surface tension γ of 25 mN/m or more.
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