JPH1192698A - Ink composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ink composition capable of being washed out with water even from a fabric coated with a cationic dye-fixing agent, capable of being surely eliminated with a bleaching agent, even when sufficiently not washed out with water, good in storage stability and visibility, and capable of being printed with an ink jet head device by using a specific coloring agent. SOLUTION: This ink composition can temporarily leave on the surface of an article to be drawn, but can finally be washed out from the surface. Therein, a triphenylmethane dye is used as the coloring agent. When the surface of the article to be drawn is drawn with a red color, the color index number: acid red 52 is preferably used as the triphenylmethane dye. When also drawn with a blue color, the color index number: acid blue 1 is preferably used as the dye. When further also drawn with a yellow color, the color index number: acid yellow 73 is preferably used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink composition which can draw a clear image or character on an object to be drawn such as cloth, leather, paper and the like and which can be removed by washing with water.

[0002]

2. Description of the Related Art Conventionally, in the apparel industry and home sewing, a pattern is used to cut a cloth into a shape used for sewing. In sewing, sewing information such as a cutting pattern, a seam pattern, a stitched portion, and a sewing method type is described on a pattern or in a manual.

[0003] In these methods, it is necessary to prepare a pattern that is finally unnecessary on paper, to draw a cutting pattern or a seam pattern on a cloth using the pattern, and to refer to a manual or the like for the sewing information. A lot of trouble and time are required, such as the trouble of sewing.

Therefore, a sewing information marking device which renders sewing information directly on a cloth material without using a pattern has been disclosed in Japanese Unexamined Patent Publication No. Hei 4-91207 and Japanese Unexamined Utility Model Publication No. Hei 4-13161.
No. 8 has been proposed.

A brown ink composition which can be erased by drawing on a cloth and washing with water is disclosed in Japanese Patent Publication No. 4-34767.
No. 4 discloses this.

The brown ink of the invention is an aqueous solution selected from the group consisting of catechol monosulfonic acid-iron complex, catechol monosulfonate complex, catechol disulfonic acid-iron complex, and hydroxyquinoline sulfonate-iron complex as a coloring substance. An aqueous ink composition for a fiber assembly containing at least one or two or more colored complexes.

However, when the brown ink composition of the invention is drawn on a fabric coated with a cationic dye fixing agent, there is a problem that it cannot be almost erased by washing with water. In addition, oxygen bleach which is generally used at home
(Hereinafter, referred to as bleaching agent), there is a problem that the cloth is discolored or damaged. This is because hydrogen peroxide in the bleaching agent, if present in the presence of a metal, significantly accelerates its decomposition due to its catalytic action, and its oxidizing power becomes abnormally strong. This is because even the structure is damaged.

Further, the above-mentioned brown ink has a problem that it has a high viscosity and is difficult to print with an ink jet head device. If you only want to lower the viscosity of the ink, it is possible to increase the proportion of water in the ink or reduce the amount of water-soluble polymer used as a thickener. If this is the case, water will easily evaporate, and if it evaporates, the viscosity of the ink will increase or a problem will occur in which solids dissolved in the solvent will precipitate.
Further, when the amount of the thickener is reduced, there is a problem that blurring of the handwriting becomes worse.

[0009] In order to solve the above-mentioned problems, the applicant of the present invention has proposed a color index number Acid Red 18 (hereinafter referred to as CI Acid Red 18) as a coloring agent.
No. 8-310).
No. 770.

[0010]

However, the above-mentioned colorant CI Acid Red 18 has a problem that the solubility is not good and the dye concentration cannot be made too high, so that the visibility is not good.

According to the present invention, in order to solve the above-mentioned problems, even a fabric coated with a cationic dye fixing agent can be erased by washing with water, and a bleaching agent is used even when the fabric cannot be erased sufficiently. An object of the present invention is to provide an ink composition which can be reliably erased, has low viscosity, has good storage stability, can be printed with an ink jet head device, and further has good visibility.

[0012]

In order to achieve this object, the ink composition according to the first aspect of the present invention temporarily remains on the surface of the object to be drawn, but is eventually cleaned by cleaning. A triphenylmethane-based dye is used as a coloring agent contained in the ink composition for those which can be removed from the surface.

As a result, the cloth coated with the cationic dye fixing agent can be erased by washing with water.
Even when erasure cannot be performed sufficiently, erasure can be surely achieved by using a bleaching agent, and printing can be performed with an ink jet head device with low viscosity and good storage stability, and further, visibility can be improved.

Further, the ink composition according to claim 2 is
As the triphenylmethane dye, Color Index Number Acid Red 52 (hereinafter CIAcid)
Red52).

As a result, the surface of the object to be drawn can be drawn in red, and the fabric on which the cationic dye fixing agent has been applied can be erased by washing with water. By using it, erasure can be surely performed, low viscosity, good storage stability can be used for printing with an ink jet head device, and visibility is further improved.

Further, the ink composition according to claim 3 is:
Color index number Acid Blue 1 (hereinafter CIAcid B) is used as the triphenylmethane dye.
lue1).

As a result, the surface of the object to be drawn can be drawn in blue, and the fabric on which the cationic dye fixing agent has been applied can be erased by washing with water. By using it, erasure can be surely performed, low viscosity, good storage stability can be used for printing with an ink jet head device, and visibility is further improved.

Further, the ink composition according to claim 4 is
As the triphenylmethane dye, Color Index Number Acid Yellow 73 (hereinafter CIAc)
id Yellow 73).

As a result, the surface of the object to be drawn can be drawn in yellow, and the fabric on which the cationic dye fixing agent has been applied can be erased by washing with water. By using it, erasure can be surely performed, low viscosity, good storage stability can be used for printing with an ink jet head device, and visibility is further improved.

[0020]

Embodiments of the present invention will be described below.

The ink composition of this embodiment uses a triphenylmethane dye as a coloring agent, so that the fabric coated with the cationic dye fixing agent has good erasability by washing with water, and is necessary. If it is used, a bleaching agent can be used, and it can be printed with an ink jet head device with low viscosity and good storage stability, and also has good visibility on cloth.

Hereinafter, specific prescriptions and effects of the red ink of this embodiment will be described.

(Example) An ink was prepared with the following composition.

Food Color Red No. 106 (CI Acid Red 52) 13.0 parts by weight Pure water 48.0 parts by weight Glycerin 33.5 parts by weight Diethylene glycol monobutyl ether 5.0 parts by weight Triethanolamine 0 0.5 parts by weight The above material was dissolved using a known method to obtain a red ink. The viscosity at room temperature is 7.0 cps and the surface tension is 3
8.4 mN / m, pH 9.13, conductivity 2580μ
S / cm.

The red ink was mounted on an ink jet apparatus, and a printing test was performed on a cloth coated with a cationic dye fixing agent. During printing, no problems such as clogging of the head nozzle were observed.

The resulting character image had a high density and was easy to recognize. In addition, when the completed character image was washed with water, the character image almost disappeared,
When washed with an oxygen-based bleaching agent, the character image was surely erased, and no problems such as discoloration or damage to the fabric occurred.

The red ink was placed in a sealed bottle and subjected to a one-week storage test at 70 ° C., 5 ° C., and −15 ° C., and a four-week storage test at a temperature of 50 ° C. As a result, no problems such as precipitation of dyes and changes in physical properties occurred at all. When the ink was placed in an evaporating dish and subjected to a one-week storage test at a temperature of 50 ° C. and a humidity of 50%, no problems such as precipitation of dyes and changes in physical properties occurred.

Comparative Example An ink was prepared with the following composition.

Food Color Red No. 102 (CI Acid Red 18) 5.0 parts by weight Pure water 49.0 parts by weight Glycerin 40.5 parts by weight Diethylene glycol monobutyl ether 5.0 parts by weight Triethanolamine 0 0.5 parts by weight The above-mentioned materials were dissolved using a known technique to obtain a red ink. The viscosity at room temperature is 6.4 cps and the surface tension is 3
3.7 mN / m, pH 9.62, conductivity 433 μS /
cm.

The red ink was mounted on an ink jet apparatus, and a printing test was performed on a cloth coated with a cationic dye fixing agent. At the time of printing, no problem such as clogging of the head nozzle was observed, and also, regarding the washing erasability of the completed character image and the storability of the ink, there was no problem as in the previous embodiment, but the completed character image was The density was lower than that of the character image of the example, and it was difficult to recognize the color image on a dark-colored cloth.

[0031]

As is apparent from the above description,
The ink composition according to claim 1 of the present invention uses a triphenylmethane-based dye as a colorant,
The fabric coated with the cationic dye fixative can be erased by washing with water, and even if it cannot be erased sufficiently, it can be erased reliably by using a bleaching agent, and has low viscosity and good storage stability. It is possible to provide an ink composition that can be printed with an inkjet head device and that has good visibility.

Further, the ink composition according to claim 2 is
CIAcid Red 5 as the triphenylmethane dye
By using 2, the surface of the object to be drawn can be drawn in red, and the fabric coated with the cationic dye fixing agent can be erased by washing with water. By using the ink composition, it is possible to provide an ink composition that can be reliably erased, has low viscosity, has good storage stability, can be printed with an inkjet head device, and has good visibility.

Further, the ink composition according to claim 3 is:
CIAcid Blue as the triphenylmethane dye
By using 1, the surface of the object to be drawn can be drawn in blue, and the fabric coated with the cationic dye fixing agent can be erased by washing with water. By using the ink composition, it is possible to provide an ink composition that can be reliably erased, has low viscosity, has good storage stability, can be printed with an inkjet head device, and has good visibility.

Further, the ink composition according to claim 4 is:
CIAcid Yello as the triphenylmethane dye
w By using 73, the surface of the object to be drawn can be drawn in yellow, and the fabric coated with the cationic dye fixing agent can be erased by washing with water. By using an agent, it is possible to provide an ink composition that can be reliably erased, has low viscosity, has good storage stability, can be printed by an inkjet head device, and has good visibility.

Claims (4)

[Claims] Claims: (1) Although it temporarily remains on the surface of an object to be drawn,
An ink composition which is finally removable from the surface by washing, wherein a triphenylmethane-based dye is used as a colorant contained in the ink composition. 2. As the triphenylmethane dye,
Color Index Number Acid Red 52
The ink composition according to claim 1, wherein (CIAcid Red 52) is used. 3. The triphenylmethane dye according to claim 1,
Color Index Number Acid Blue 1 (C.
2. I.Acid Blue 1) is used.
3. The ink composition according to claim 1. 4. As the triphenylmethane dye,
Color Index Number Acid Yellow 73
The ink composition according to claim 1, wherein (CIAcid Yellow 73) is used.