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Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method

An inkjet recording method and water-based ink technology, which can be used in inks, printing, household appliances, etc., can solve the problems of insufficient area area coefficient, insufficient image density, and increased amount of ink imparted.

Inactive Publication Date: 2006-02-08
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, according to studies by the inventors of the present invention, it has been found that in the above technique, in order to aggregate pigment particles on the recording medium, there is an area (so-called area factor) in which the surface of the recording medium is covered with the coloring material relative to the volume of the ink droplet. Insufficient situation
Compared with conventional pigment inks in which pigments are dispersed by polymer dispersants, etc., this means that in order to obtain the same image density in the above technique, the amount of ink that needs to be applied increases, and there is still room for improvement in this point.
In addition, there is a method to obtain a large area factor even with a small-volume ink droplet by improving the penetrability of the ink to the recording medium. However, when the penetrability of the ink is improved, not only the surface of the recording medium, Also permeates to the inside, and sufficient image density cannot be obtained

Method used

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  • Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method
  • Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method
  • Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0238] Using the above-prepared water-soluble organic solvents and pigment dispersions 1 to 3, mix the ingredients listed in Table 2 and stir to dissolve or disperse, then pressurize in a micron filter with a pore size of 3.0μm (manufactured by Fuji Film) Filter to prepare the inks of Examples 1 to 5. At this time, taking the total weight (weight%) of the good solvent in the ink as A, and taking the total weight (weight%) of the poor solvent in the ink as B, A:B is 10:5 or more and 10:30 or less When comparing the Ka values ​​of a plurality of water-soluble organic solvents obtained by the bristow method with respect to the Ka value of the 20% aqueous solution of the above-mentioned good solvent of the water-insoluble colorant obtained by the bristow method, it is prepared The water-soluble organic solvent with the largest Ka value is a poor solvent.

[0239] Coordination (wt%)

[0240] (*) Product name: アセチレノ一ル EH; manufactured by Chuanyan Fianken

Embodiment 4

[0241]

[0242] Regarding the ink of Example 4 prepared as described above, its composition is assumed to be unknown, and the following method was used to verify that the ink is the object of the present invention. According to the verification method, even if the composition is an ink whose composition is unknown, it can be confirmed whether the ink is the object of the present invention.

[0243] The type and amount of the organic solvent contained in the ink are, for example, GC / MS (trade name: TRACE DSQ; manufactured by ThermoQuest). Specifically, for example, 1 g of the ink of Example 4 is divided, and the sample diluted with methanol is analyzed by the above-mentioned GC / MS. As a result, first, the presence of glycerol, diethylene glycol, and polyethylene glycol 600 can be confirmed. Secondly, it is necessary to determine whether these three solvents are good solvents or poor solvents. According to the above-mentioned method for determining good and poor solvents, a dispers...

Embodiment 7～16

[0314] As the black ink, the inks of Examples 1 to 5 described above were used in combination with the color ink to form an image. The color ink used at this time was prepared as follows.

[0315] (Production of Cyan Ink)

[0316] The components shown below were mixed and fully stirred to dissolve them, and then pressure-filtered on a micron filter (manufactured by Fujifilm) with a pore size of 0.2 μm to prepare a cyan ink.

[0317] ·DBL (Direct Blue) 199 3.5 copies

[0318] ·Glycerol 7.5 parts

[0319] ·Diethylene glycol 7.5 parts

[0320] ·Acetylene alcohol E-100 1.0 parts

[0321] · 80.5 parts of pure water

[0322] (Production of magenta ink)

[0323] According to the following composition, red ink is prepared in the same way as cyan ink.

[0324] ·AR (Acid Red) 289 2.5 parts

[0325] ·Glycerol 7.5 parts

[0326] ·Diethylene glycol 7.5 parts

[0327] ·Acetylene alcohol E-100 1.0 parts

[0328] · 81.5 parts of pure water

[0329] (Production of yellow ink)

[0330] According to...

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Abstract

A water base ink comprising water, multiple water soluble organic solvents of different types and a water insoluble color material, wherein the multiple water soluble organic solvents comprises a good solvent for the water insoluble color material and a poor solvent for the water insoluble color material, wherein providing that A represents the total amount (mass%) of good solvent in the ink while B represents the total amount (mass%) of poor solvent in the ink, the ratio of A:B is in the range of 10:5 to 10:30, and wherein upon comparison of the respective Ka values, determined in accordance with the Bristow method, of the multiple water soluble organic solvents, the water soluble organic solvent exhibiting the maximum Ka value is a poor solvent. With respect to pigment inks, images of high OD having a satisfactorily large area factor even with a small amount of ink drop can be obtained.

Description

Technical field [0001] The present invention relates to an aqueous ink containing a water-insoluble colorant, and more specifically to a recording method and recording apparatus using an inkjet recording method, and further, an aqueous ink suitable for an inkjet image forming method. Background technique [0002] Conventionally, it is known that by containing a water-insoluble colorant as a colorant, for example, a pigment-containing ink (pigment ink), an image with excellent fastness such as water resistance and light resistance can be obtained. [0003] In recent years, based on such inks, various technical proposals have been proposed for the purpose of further improving the optical density of the formed image. For example, a technical proposal has been proposed to further increase the image density by using an ink formed of a self-dispersing carbon black and a specific salt (for example, refer to Patent Document 1). In addition, there is also an inkjet recording ink containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00B41J2/01C09D11/32C09D11/322
Inventor 真田干雄高桥胜彦小笠原干史渡边智成德田愉衣
Owner CANON KK
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