Inkjet recording ink, inkjet recording ink set, and ink cartridge
A technology for inkjet recording ink and kit, applied in the directions of ink, printing, household appliances, etc., can solve the problems of ink adhesion, jetting failure, cost increase, etc., and achieve the effect of excellent ink storage and anti-foaming.
Active Publication Date: 2013-10-23
RICOH KK
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AI Technical Summary
Problems solved by technology
[0011] Also, JP-A No. 2007-136988 uses UV radiation and as a result, usable ink formulations are limited, which complicates the inkjet recording apparatus, resulting in an increase in cost
[0012] Also, among the inks disclosed in JP-A No. 2009-138118, black inks and color inks are unsatisfactory
When this ink is left for a long period of time, ink sticking to the repellent film of the print head tends to occur, often causing jetting failure
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0256] Embodiment 1 (black ink, number 1)
[0257] A black ink, No. 1, was obtained according to in [Preparation of Pigment Dispersion] and in [Preparation of Inks of Examples and Comparative Examples].
Embodiment 2
[0258] Embodiment 2 (yellow ink, number 2)
[0259] A yellow ink, No. 2, was obtained according to in [Preparation of Pigment Dispersion] and in [Preparation of Inks of Examples and Comparative Examples].
Embodiment 3
[0260] Example 3 (magenta ink, number 3)
[0261] Magenta ink No. 3 was obtained according to in [Preparation of Pigment Dispersion] and in [Preparation of Inks of Examples and Comparative Examples].
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Abstract
An inkjet recording ink, including: a pigment; a water-soluble organic solvent; a surfactant; a polyether-modified silicone oil; a dispersing agent represented by the following General Formula (1) or (2); and water, wherein the water-soluble organic solvent contains: glycerin as a first water-soluble organic solvent; and a second water-soluble organic solvent, wherein the second water-soluble organic solvent is dipropylene glycol, 1,3-butanediol, 3-methyl-1,3-butanediol, 1,5-pentanediol, 1,6-hexanadiol, or any combination thereof, and wherein a mass ratio of the first water-soluble organic solvent:the second water-soluble organic solvent is 1:0.75 to 1:2.25, where R1 represents a C1-C20 alkyl group, an allyl group or an aralkyl group, L is an integer of 0 to 7, and n is an integer of 20 to 200, where m is an integer of 1 or greater.
Description
technical field [0001] The present invention relates to an inkjet recording ink, an inkjet recording ink kit, and an ink cartridge. Background technique [0002] Inkjet printers using an inkjet recording method are compact and inexpensive and form color images in a simple manner, and thus have rapidly become popular. In recent years, there has been a demand to print high-quality images at high speed. In order to satisfy this requirement, the ink used in the inkjet recording method must satisfy various characteristics. In particular, when high-speed printing is performed, it is important to suppress ink bleeding on a recording medium or keep ink ejection stability good. The decrease in ejection stability is mainly caused by drying or foaming of the ink in the nozzle, and therefore it is necessary to improve this phenomenon. [0003] In this regard, since an ink set that does not cause bleeding not only on white paper but also on coated paper is poor in water absorption, an...
Claims
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IPC IPC(8): C09D11/10B41J2/175
CPCC09D11/40C09D11/38C09D11/322
Inventor 长谷川慎伏见宽之
Owner RICOH KK