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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMamoru Soga, Takuma Takasu, Hidekazu Arase
Estimating the term…
In order to improve the water-resisting property of an image formed on a recording medium such as recording paper and plain paper by using an ink-jet recording ink, while also improving the light-resisting property of the image, an ink-jet recording ink, which contains a color material, water, a moisture-retaining agent, an organic silicon compound and an ultraviolet-ray absorbing agent, is allowed to contain an organic silicon compound in a range of 0.1 parts by weight to 50 parts by weight and an ultraviolet-ray absorbing agent in a range of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the ink. The ultraviolet-ray absorbing agent is at least one compound selected from the group consisting of benzophenone-based, benzotriazole-based, cyanoacrylate-based and oxalic acid anilide-based compounds. Light energy of ultraviolet rays is converted to kinetic energy, heat energy and the like by the ultraviolet-ray absorbing agent at a predetermined concentration contained in the ink to prevent an amino group in the organic silicon compound from attacking an azo group in the color material due to the application of the ultraviolet rays. Alternatively, an ink-jet recording ink, which contains a color material, water, a moisture-retaining agent and an organic silicon compound, is arranged so that the organic silicon compound contains an ultraviolet-ray absorbing part, and the ultraviolet-ray absorbing part is prepared as at least one functional group selected from the group consisting of benzophenone-based, benzotriazole-based, cyanoacrylate-based and oxalic acid anilide-based functional groups. Alternatively, the ink is allowed to further contain an ultraviolet-ray absorbing agent having an acidic group.
An ink-jet recording ink comprising:
An ink-jet recording ink comprising:
An ink-jet recording ink, which comprises a color material, a moisture-retaining agent, water and a water soluble substance that is subjected to a condensation polymerizing reaction without water, further comprising an ultraviolet-ray absorbing agent having an acidic group.
Dependencies are inferred from the claim text.
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Inkjet printing inks: characterised by non-macromolecular additives other than solvents, pigments or dyes
Coating compositions
Term end not estimated
BACKGROUND OF THE INVENTION
The present invention relates to an ink-jet recording ink that is suitably applied to ink-jet recording, an ink cartridge and a recording device using such an ink.
Conventionally, with respect to the ink used for ink-jet recording of this type, an ink containing a dye serving as a color material, a moisture-retaining agent, a penetrating agent and water has been well known. When an image is formed on a recording medium such as recording paper and the like by using an ink containing a dye, a problem is raised in the water-resisting property of the image, that is, in that the dye oozes into water when the image gets wet with water. In particular, when plain paper (commonly-used commercial paper, more specifically, paper which is used in a copying machine in an electrophotographic system, and is not intended to provide optimal structure, composition, characteristics and the like for use in ink-jet recording) is used for the recording, the water-resisting property deteriorates seriously.
FIG. 1 is a schematic perspective view that shows an ink-jet-type recording device provided with an ink-jet recording ink in accordance with an embodiment of the present invention.
FIG. 2 is a partial bottom view of an ink-jet head of the ink-jet-type recording device.
FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2.
Hereinafter, preferred embodiment of the present invention will be described with reference to the accompanying drawings.
(Embodiment 1)
FIG. 1 is a schematic drawing that shows an ink-jet-type recording device provided with an ink-jet recording ink in accordance with embodiment 1 of the present invention. In this recording device, an ink cartridge 35 is provided with an ink-jet head 1 having the above-mentioned ink that is attached to the top face thereof, and this ink-jet head 1 discharges the ink onto recording paper 41 serving as a recording medium as will be described later. Moreover, the ink-jet head 1 is supported and secured onto a carriage 31, and this carriage 31 is supported by a carriage shaft 32 that extends in a main scanning direction (X-direction shown in FIGS. 1 and 2). Here, a carriage motor (not shown) is installed in the carriage 31, and this carriage motor allows the ink-jet head 1 and the carriage 31 to reciprocally move in the main scanning direction while being guided by the carriage shaft 32.