JPH06207132A - Ink for ink jet printing - Google Patents

Abstract

PURPOSE:To obtain an ink for ink jet printing using a disperse dye without causing nondischarging or nozzle clogging, etc., and capable of performing the printing for a long period. CONSTITUTION:This ink is composed of a disperse dye and a water-soluble organic solvent capable of dissolving the disperse dye or the disperse dye, the water-soluble organic solvent capable of dissolving the disperse dye and a low- boiling alcohol.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printing ink, and more particularly to an ink jet printing ink suitable for printing a cloth made of polyester fiber.

[0002]

2. Description of the Related Art Conventionally, as a method for printing a pattern on a cloth, a screen printing method, a roller printing method, a rotary screen printing method, a transfer printing method, etc. have been used. It is necessary to prepare engraving rollers, transfer paper, etc., and since the production of these screen frames, engraving rollers, transfer paper is quite expensive, not only is it economically incompatible unless a large lot is produced, It has the drawback of not being able to quickly respond to the diversification of fashion.

In order to solve these drawbacks, a sample is read by a scanner and image processing is performed by a computer.
Techniques for printing the results by an inkjet system have been developed, and as inks used in these inkjet systems, those in which various water-soluble dyes are dissolved in water are known. As the water-soluble dye, direct dyes, acid dyes, reactive dyes, etc. have been used, but there is a problem that such dyes cannot be applied to polyester fibers.

Therefore, an ink for ink-jet printing using a disperse dye has been developed, for example, JP-A-50-59.
No. 108 discloses a dispersion type in which a disperse dye is dissolved in an organic solvent which is not water-soluble, and JP-A-54-18974.
The publication discloses a dispersion type in which a disperse dye is dissolved in water. However, the dissolution type inkjet printing ink dissolved in a non-water-soluble organic solvent has a problem that ejection failure sometimes occurs.On the other hand, the dispersion type inkjet printing ink has a problem that the particles of the disperse dye are aggregated into a huge particle. However, there is a problem in that the nozzle is clogged due to incomplete dispersibility and stable printing cannot be performed for a long time.

[0005]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted intensive studies on a method of printing a disperse dye ink on a cloth by an ink jet system, and as a result, have found a new ink in which the above problems have been solved and completed the present invention. It was done. An object of the present invention is to prevent ejection failure or nozzle clogging,
An object is to provide an ink-jet printing ink that enables printing for a long time.

[0006]

In order to achieve the above object, the present invention has the following constitution. That is, the first invention is a gist of an ink for ink-jet textile printing, which comprises a disperse dye, a water-soluble organic solvent capable of dissolving the disperse dye, and water, and the second invention is An ink jet printing ink comprising a disperse dye, a water-soluble organic solvent capable of dissolving the disperse dye, and a low boiling point alcohol.

The present invention will be described in detail below.

In the present invention, examples of the disperse dye include anthraquinone type, azo type, nitrodiphenylamine type, methine type, aminoketone type, ketoimine type and the like.
Specifically, C.I. I. Disperse Yellow
79, 160, C.I. I. Disperse Red 5
0, 72, 127, 146, 283, C.I. I. Disp
erse Blue 73, 142, 198, 224,
C. I. Disperse Black 1 etc. are mentioned. The content of these disperse dyes is preferably 3 to 20% by weight, more preferably 5 to 10% by weight based on the total amount of the ink.
% By weight.

Examples of the organic solvent which is water-soluble and can dissolve the disperse dye in the present invention include thiodiglycol, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether. ether,
Examples thereof include polyethylene glycol monoethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, polyethylene glycol dimethyl ether and diethylene glycol monobutyl ether. The content of these organic solvents is preferably 50 to 90% by weight, more preferably 60 to 90% by weight, based on the total ink.

The water used in the present invention is for improving the surface tension of the dye ink, and the preferred content of water is 5 to 50% by weight, more preferably 10 to 40% by weight based on the total weight of the ink. % By weight.

The low boiling point alcohol used in the present invention is isopropyl alcohol, methanol, ethanol,
Examples thereof include butanol, and the low-boiling alcohol content is preferably 5 to 50% by weight, more preferably 10 to 40% by weight, based on the entire ink.

The ink jet printing ink having such a composition is applied to a cloth by embedding a heating resistance element in a nozzle, boiling the ink by its heat generation, and ejecting the ink by the pressure of the bubble, a piezoelectric method. A pulse jet method in which an electrical signal is applied to an element to deform it to excite changes in the volume of the ink chamber to fly ink particles, and ink is continuously jetted under pressure from a nozzle that is vibrating ultrasonically to form particles, and the particles are charged. It is carried out by a charge control method or the like in which recording and non-recording particles are recorded separately by passing and deflecting in a controlled constant electric field.

It is to be noted that the cloth made of polyester fiber or the like is bleeding when one kind selected from a water repellent or a soft water repellent and a paste agent are applied by a padding method, a spray method, a coating method or the like. Preferred for prevention.

The water repellent is not particularly limited, and any general water repellent such as a fluorine compound, a silicon compound, a zirconium compound can be used. Further, as the soft water repellent, octadecyl ethylene urea, zirconium acetate,
Examples thereof include polyolefin compounds, wax compounds, silicone compounds and the like. The amounts of the water repellent and the soft water repellent are preferably used so as to be attached to the cloth in a dry weight ratio of about 0.1 to 10%. That is, when used in a large amount, the product obtained becomes too water-repellent to give a print-like product, and a large amount of finishing agent is required during the subsequent finishing processing.

The sizing agent is not particularly limited, and starches (starch, soluble starch, water-soluble starch derivative, etc.), water-soluble cellulose derivative (carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, etc.), sodium alginate, gum arabic, gum Classes (locust bean gum, guar gum, etc.), water-soluble proteins (gelatin, glue, etc.), water-soluble synthetic polymer compounds (sodium polyacrylate, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, quaternary) Water-soluble cationic polymer, etc.) and the like. The amount of such a sizing agent is preferably used so as to adhere to the cloth in a dry weight ratio of about 0.1 to 3%. That is, if used in a large amount, the texture becomes too hard, so the above ratio is used.

[0016]

Example 1 Polyethylene terephthalate 50d / 18
f as warp, polyethylene terephthalate 50d / 18
Using f as a weft, a plain woven fabric woven with a warp density of 110 yarns / inch and a weft yarn density of 85 yarns / inch was prepared, and the woven fabric was desizing, scouring, and heat setting processed by known methods. Thereafter, 2.5 parts by weight of Sumiflule Oil EM21 (Sumitomo Chemical Co., Ltd., fluorine-based water repellent), Duck Algin NSPH (Kibunsha, high-viscosity sodium alginate) were added to this plain weave.
A treatment liquid consisting of 5 parts by weight and 97 parts by weight of water was padded, squeezed with a mangle to a squeezing ratio of 35%, and then dried at 120 ° C. for 2 minutes.

Separately, a disperse dye (yellow: C.I.
Perse Yellow 79, Magenta: C.I. I.
Disperse Red 283, cyan: C.I. I.
Disperse Blue 224, Black: C.I.
I. Disperse Black 1) 5 parts by weight,
70 parts by weight of thiodiglycol and 25 parts by weight of water 4
Color ink is prepared, and this ink is installed in a pulse jet type inkjet printer, and 8 dots / mm
Was continuously printed on the pretreated fabric.

Next, the textile printing fabric thus obtained is
It was dried at 20 ° C for 2 minutes, then wet heat treated at 170 ° C for 10 minutes, hydrosulfite 2g / l, soda ash 2
The product of Example 1 was obtained by washing with g / l water-soluble at 90 ° C. for 5 minutes, followed by washing and drying.

Example 2 A product of Example 2 was obtained by performing the same treatment as in Example 1 except that isopropyl alcohol was used instead of water.

Comparative Example 1 The product of Comparative Example 1 was obtained by performing the same treatment as in Example 1 except that acetone was used instead of thiodiglycol.

Table 1 shows the number of discharge failures of the products obtained in Examples 1, 2 and Comparative Example 1.

[0022]

[Table 1] However, print width 120 cm, print length 25 m

As is clear from Table 1, there is no discharge failure when ink-jet printing is performed using the inks of Examples 1 and 2, and the inks of Example 1 and Example 2 exhibit good ejection properties. I understand.

[0024]

As described in detail above, by using the ink jet printing ink of the present invention, it is possible to easily obtain a polyester fiber printed product with a disperse dye, and it is possible to carry out printing that can cope with a variety of fashions. Is very useful. In addition, there is no discharge failure or clogging for a long time, and there is an effect of improving productivity and quality.

Claims (1)

[Claims] 1. An ink jet printing ink comprising a disperse dye, a water-soluble organic solvent capable of dissolving the disperse dye, and water. 1. An ink-jet printing ink comprising a disperse dye, a water-soluble organic solvent capable of dissolving the disperse dye, and a low boiling point alcohol.