JP2593830B2 - Fabric printing method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for printing a fabric by an ink jet method, and more particularly, to a method for printing on a fabric by the ink jet method which is clear and excellent in levelness and fixation. The present invention relates to a printing method capable of performing the following.

(Prior Art) Conventionally, screen printing, roller printing, rotary screen printing, transfer printing, and the like have been used as a method of printing a pattern on a cloth. It is necessary to prepare engraving rollers, transfer paper, and the like, and the production of these screen frames, engraving rollers, and transfer paper is quite expensive. It has the disadvantage that it cannot respond quickly to diversification of fashion.

In order to solve these drawbacks, technologies have been developed in which samples are read by a scanner, image processing is performed by a computer, and the results are printed by an ink jet method. Therefore, when applied to a fabric, there is a problem that bleeding is remarkably unclear, and there is a problem that the uniform dye and the fixability are inferior. Therefore, it has been desired to solve the problem.

A method of increasing the viscosity of the dye ink is known for the purpose of preventing the bleeding. However, when the viscosity of the dye ink is increased, nozzle clogging of the ink jet occurs.

To solve these problems, JP-A-63-85188 proposes a method of preventing bleeding by pre-treating with a water-soluble polymer such as starch or carboxymethylcellulose in advance. There is a disadvantage that the prevention effect is not obtained.

Japanese Patent Application Laid-Open No. 2-53976 discloses a method in which a fabric is pretreated with a hydrotrope agent before printing by an ink jet method. A method of printing by an ink jet method after the treatment has been proposed, but has a drawback that a sufficient bleeding preventing effect cannot be obtained and the sharpness and the fixability are poor. Furthermore,
It is known that a hydrotropic agent is added to a dye in a usual printing method in order to improve clarity and fixation (Japanese Patent Application Laid-Open Nos. 49-1226987 and 49-12).
However, when printing is carried out by an ink jet method using a dye ink containing a hydrotrope agent, the dye ink bleeds and penetrates due to the water absorption and permeability of the hydrotrope agent, resulting in sharpness. It has the disadvantage that it is inferior.

In the state of the art, there is no ink jet printing of a fabric which has all of clarity, levelness, and fixing property.

(Problems to be Solved by the Invention) The present inventors have conducted intensive studies on a printing method for fabrics by an ink jet method, and as a result, have found a novel printing method in which all of the problems of the existing methods have been solved. It is completed.

An object of the present invention is to provide a method for printing a fabric having excellent clarity, levelness and fixability.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration.

That is, the first invention is a method of ink-jet printing a fabric using a dye ink, wherein the fabric is pretreated in advance with at least one selected from a water repellent and a soft water repellent, and then a hydrotrope is prepared. The gist of the present invention is a method of printing a fabric, which comprises printing by an ink jet method using a dye ink contained therein, and then fixing the dye, and a second invention is a method of ink jet printing a cloth using a dye ink. In the above, after pre-treating the fabric with at least one selected from a water repellent and a soft water repellent, and a hydrotrope, printing by an ink jet method, and then fixing a dye, The printing method is the gist.

 Hereinafter, the present invention will be described in detail.

The fabric used in the present invention is cotton, rayon, hemp,
It is made of natural fibers such as silk and wool, semi-synthetic fibers such as acetate and triacetate, synthetic fibers such as polyester, nylon, and acrylic, and blended and mixed fabrics of various fibers. Examples of the fabric include a woven fabric, a knitted fabric, and a non-woven fabric.

In practicing the present invention, (A) at least one selected from a water repellent and a soft water repellent, or (B) at least one selected from a water repellent and a soft water repellent, and a hydrotrope are used. A pretreatment is performed with a dispersion or dissolved treatment liquid (hereinafter referred to as a pretreatment agent). Examples of a method for applying the treatment liquid include a padding method, a spray method, a coating method, and the like, and a heat treatment is performed if necessary.

The water repellent used in the present invention is not particularly limited, and any common water repellent such as a fluorine compound, a silicon compound and a zirconium compound can be used.

Examples of the soft water repellent used in the present invention include octadecylethylene urea, zirconium acetate, polyolefin compounds, wax compounds, and silicone compounds.

The amount of the water repellent and / or the soft water repellent used is such that the water absorption is 5 seconds or more and 240 seconds or less according to the JIS L 1096A method (dropping method). If it is less than 5 seconds or more than 240 seconds, the sharpness and levelness will not be improved.

The hydrotrope used in the present invention is used in a conventional printing method and has an action of improving fixation and leveling properties. Specifically, urea, monomethyl urea, dimethyl urea, thiourea , Monomethylthiourea,
Examples thereof include dimethylthiourea, formamide, dimethylformamide, and dimethylacetamide.
It is common to use urea. The amount of these hydrotrope agents used is such that when they are formulated for the padding method, they are fixed at 0.1 to 30% by weight based on the weight of the fabric. If it is less than 0.1% by weight, the fixability and leveling property are not improved, and if it is more than 30% by weight, it is not economical for its effect, and the feeling becomes hard and the subsequent handling becomes difficult.

The pretreatment agent may contain a fixing agent, for example, an alkaline substance such as sodium carbonate or sodium hydrogen carbonate.

Next, a dye is applied to the treated fabric by an ink jet method.

The ink jet method used in the present invention is a bubble jet method in which a heating resistor element is embedded in a nozzle, the ink is boiled by the heat generated, and the ink is ejected by the pressure of the bubbles. Pulse jet method, which excites the ink particles by exciting the volume change of the chamber, ink is continuously ejected from the nozzle which is ultrasonically vibrated under pressure, and the ink is turned into particles. , A non-recording particle, and recording.

The dyes used in the present invention include direct dyes, reactive dyes, acid dyes, and the like depending on the material of the fiber structure constituting the fabric.
Cationic dyes, disperse dyes and the like can be used. For example, there are direct dyes, acid dyes and reactive dyes for silk fibers, direct dyes and reactive dyes for silk fibers, disperse dyes for polyester fibers, and acid dyes and reactive dyes for nylon fibers.

In the present invention, as a medium for dissolving or dispersing the dye as described above, a medium in conventional general printing,
A medium used in a conventional ink jet system can be used, and examples thereof include water or a mixture of water and an organic solvent, but water is generally used. If no hydrotrope is used as a pretreatment agent, a hydrotrope is added to the dye ink. Various dispersants, surfactants, viscosity adjusters, surface tension adjusters, PH adjusters, conductivity adjusters, and the like are added to the dye ink as needed.

The printed fabric is then dried at 80-120 ° C,
Next, the dye is fixed by a method corresponding to the dye, washed and dried.

(Action) In the present invention, since the pretreatment agent contains at least one selected from a water repellent and a soft water repellent, a water repellent film is formed on the surface of the fabric by the pretreatment. When printing by the ink jet method using dye ink by the action of the film, bleeding is prevented and sharpness is improved,
Also, since the dye ink does not penetrate into the fiber, the surface density is improved, and the colors are not mixed in a wider range. Therefore, when printing in the order of blue, red, yellow, and black, color fluctuation does not occur. Leveling property is obtained.

In addition, since the pretreatment agent or the dye ink contains a hydrotrope agent, the fixability and the leveling property are further improved.

(Examples) Next, the present invention will be specifically described based on examples.

Example 1 In this example, a cotton plain woven fabric having a warp density of 130 yarns / inch and a weft density of 70 yarns / inch consisting of a warp No. 50 single yarn and a weft No. 50 single yarn was used as a fabric in the usual manner by sintering and gluing. The material that had been subjected to the extraction, scouring and bleaching treatments was used.

Immediately after padding the plain fabric with the pretreatment agent shown below, it was squeezed with a mangle at a pickup rate of 70%,
It was dried at 0 ° C. for 2 minutes and heat-treated at 150 ° C. for 3 minutes.

20 parts of reactive dye (CI Reactive Red 31),
Dye ink consisting of 5 parts of urea and 75 parts of water is mounted on a pulse jet type inkjet printer and 8 dots / m
m continuous printing was performed.

Next, the product was steamed at 108 ° C. for 20 minutes and then washed to obtain the product of Example 1.

Comparative Example 1 A product of Comparative Example 1 was obtained by using the same plain fabric as in Example 1 and performing the same treatment as in Example 1 except that no pretreatment agent was applied.

Comparative Example 2 Example 1 was repeated except that the same plain fabric as in Example 1 was used, no pretreatment agent was applied, and urea was not used in the dye ink.
The same process as in Example 1 was performed to obtain a product of Comparative Example 2.

Next, the average dot diameter of the products obtained in Example 1, Comparative Examples 1 and 2, and the K / S value at a maximum absorption wavelength of 540 nm were measured. The results are shown in Table 1.

As is clear from Table 1, the product obtained in Example 1 has high clarity and high dye fixability.

Example 2 In this example, a cotton plain woven fabric having a warp density of 130 yarns / inch and a weft density of 70 yarns / inch consisting of a warp No. 50 single yarn and a weft No. 50 single yarn as a fabric was subjected to shaving and gluing by a conventional method. The material that had been subjected to the extraction, scouring and bleaching treatments was used.

Immediately after padding the plain fabric with the pretreatment agent shown below, it was squeezed with a mangle at a pickup rate of 70%,
Dry at 0 ° C. for 2 minutes.

20 parts of reactive dye (CI Reactive Red 31),
A dye ink consisting of 80 parts of water was mounted on a pulse jet type ink jet printer to perform continuous printing at 8 dots / mm.

Next, the product was steamed at a saturated steam of 108 ° C. for 20 minutes, and then washed to obtain a product of Example 2.

Comparative Example 3 The same plain fabric as in Example 2 was used, and 5 parts of Dick Silicone Softener 200 and 3 parts of sodium carbonate were used as pretreatment agents.
Parts and 92 parts of water, except that the same treatment as in Example 2 was carried out to obtain a product of Comparative Example 3.

Comparative Example 4 The same plain fabric as in Example 2 was used, and urea was used as a pretreatment agent.
The same treatment as in Example 2 was carried out except that 10 parts, 3 parts of sodium carbonate and 87 parts of water were used, to obtain a product of Comparative Example 4.

Next, the average dot diameter of the products obtained in Example 2, Comparative Examples 3 and 4, and the K / S value at the maximum absorption wavelength of 540 nm were measured. The results are shown in Table 2.

As is apparent from Table 2, the product obtained in Example 2 has high clarity and high dye fixability.

(Effects of the Invention) As described in detail above, according to the method of the present invention, a clear and excellent fixation and levelness can be obtained. It is very useful because it can respond immediately.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-53976 (JP, A) JP-A-60-99081 (JP, A) JP-A-49-1226987 (JP, A) JP-A-49-14987 126986 (JP, A)

Claims (2)

(57) [Claims] In a method of ink-jet printing a fabric using a dye ink, the fabric is pretreated with at least one selected from a water repellent and a soft water repellent, and then the dye ink contains a hydrotrope agent. A textile printing method using an ink-jet printing method, and then fixing the dye. 2. A method for ink-jet printing a cloth using a dye ink, wherein the cloth is pretreated with at least one selected from a water repellent and a soft water repellent, and a hydrotrope, and then the ink-jet printing is performed. Printing, and then fixing the dye.