JP2968286B2 - Method for producing ink-jet dyeing fabric and dyeing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing an inkjet fabric and a dyeing method using the fabric for imparting a good quality image to a fabric during inkjet dyeing. is there.

[Prior art] Conventionally, hand-printing, roller printing, screen printing, transfer printing, and the like have been used as a method of forming a pattern on a fabric. It is a method of preparing and performing.

In recent years, an ink-jet printing method has been developed in the field of paper printing and has already been put to practical use.

Since the pattern formation by the ink jet method can be manufactured without spending time and money by combining with a pattern reader or a computer, attention has been paid in the field of textiles, and an attempt has been made to apply the pattern to fabrics as it is. I have.

When this inkjet dyeing is applied to fabrics, the important points are as follows.

(1) A bleeding prevention process is performed to obtain a delicate image on the cloth.

(2) High color developability can be obtained by applying a small amount of ink.

(3) Leveling can be obtained by applying a small amount of ink.

(4) Ink ejection is stable.

The present inventors have already proposed the following method for prevention of ink bleeding.

(A) A method in which a special pretreatment is used for a fabric.

(B) A method using a special ink.

(C) A method using both special pretreatment and special ink.

Regarding (A), a water-repellent treatment for preventing the movement of the ink (JP-A-60-99081) and a treatment with a water-soluble polymer for the purpose of improving the water retention of the fabric (JP-B-63-31592) ).

Regarding (B), bleeding is prevented by the ink having the specific viscosity behavior (Japanese Patent Application Laid-Open No. 62-101669).

About (C), the movement of the ink is reduced from both the cloth and the ink. For example, as a gelling method (Japanese Patent Application Laid-Open Nos. 60-81379 and 61-231287)
Among these, when some additive is required for the ink, the ink ejection performance is often deteriorated even if the effect of preventing bleeding is great. That is, the additive causes a decrease in ink ejection property and reliability due to an increase in ink viscosity, an increase in tackiness, an increase in insoluble components, and the like.

On the other hand, both the sufficient bleeding-preventing effect and the high color developing property are not satisfied only by the pretreatment of the fabric. According to the study of the present inventors, in order to obtain a dark color, either the amount of applied ink is increased or the concentration of the dye in the ink is increased.

The bleeding increases as the amount of ink applied increases, and the ejection performance decreases as the dye concentration in the ink increases.

Therefore, in the present situation, in the prevention of ink bleeding, the high dyeing property, the leveling property, and the ink ejection performance, even if each factor alone can be satisfied, not all the factors are satisfied.

[Problems to be Solved by the Invention] The present inventors have conducted intensive studies in order to solve these problems, in particular, prevention of ink bleeding, high color development, and levelness. The present inventors have found that the above-mentioned problems can be satisfied and all the factors can be satisfied by ink-jetting a pretreated cloth with a treatment liquid in a solution system with a water-soluble solvent, and the present invention has been achieved.

The object of the present invention is to prevent bleeding, and high color development,
An object of the present invention is to provide a method for producing an inkjet dyeing fabric and a dyeing method for obtaining a high-quality image.

[Means for Solving the Problems] The present invention has the following configuration to achieve the above object.

(1) A method for producing a fabric for inkjet dyeing, comprising applying an aqueous treatment liquid containing a water-soluble polymer and a water-soluble organic solvent to a fabric, and drying.

(2) A method for producing an inkjet dyeing fabric, comprising applying an aqueous treatment liquid containing a water-soluble polymer, a water-soluble organic solvent, and a foaming agent to the fabric and drying.

(3) The method for producing an inkjet dyeing fabric according to (1), wherein the water-soluble organic solvent has a boiling point of 60 to 250 ° C.

(4) A dyeing method characterized by performing inkjet dyeing using the inkjet dyeing fabric obtained by the manufacturing method described in the above (1) to (3), followed by fixing and soaping.

 Hereinafter, the present invention will be described in detail.

Normally, when an aqueous solution of a water-soluble polymer as a pretreatment agent is squeezed by a mangle, the water-soluble polymer is distributed almost uniformly at a constant rate on the entire surface of the cloth, that is, on the surface, inside and voids at the moment of squeezing. Thereafter, the water-soluble polymer in the fabric is heated and dried and solidified in a drying step. In this case, the viscosity of the water-soluble polymer applied to the fabric increases as the water evaporates from the surface, and the volume of the water-soluble polymer decreases. It becomes a solid that fills the fiber bundle in the form of bonding. Such movement during the drying process is called migration. As a result, after drying, a large amount of the water-soluble polymer adheres to the surface and inside of the fiber bundle, and the fibers are in a state of being bundled in a bundle. Not attached. When ink is applied to such a fabric by inkjet, the ink is diffused on the surface of the fibers solidified in the bundle faster than the water-soluble polymer absorbs the ink, and runs between the yarns and spreads. Even if a large amount of a water-soluble polymer is applied, bleeding hardly stops, and satisfactory quality cannot be obtained.

The present inventors have conducted various studies on the relationship between the prevention of bleeding and the state of adhesion of the water-soluble polymer in order to solve these problems, and as a result, have reached the present invention.

That is, the present inventors have investigated the fact that the ink can be quickly absorbed and thickened by covering the entire surface, inside, and voids of the fabric with a flaky coating of a water-soluble polymer. is there.

Furthermore, the present inventors have found that by using a water-soluble solvent in combination with an aqueous solution of a water-soluble polymer, the bleeding-preventing effect is significantly higher than in the case of a simple aqueous solution.

According to the present invention, when the fabric is treated with an aqueous treating agent in which a water-soluble polymer is used in combination with a high-boiling water-soluble organic solvent, as the water evaporates in the drying step, the system becomes unstable and the water-soluble polymer becomes It is presumed that solidification is easier, migration is suppressed, and an adhesion state close to an ideal system is obtained.

Also, when the fabric is treated with a water-soluble polymer in combination with a water-soluble low-boiling solvent, the evaporation rate becomes two-stage, the coating form of the water-soluble polymer is easily disturbed, and the ink absorption is considered to be faster. .

That is, when comparing the conventional treatment with the water-soluble polymer alone and the combined use of the water-soluble polymer / water-soluble organic solvent of the present invention, the same amount of the water-soluble polymer is provided after drying. Nevertheless, the bleeding prevention properties of the present invention are remarkably good.

Thus, the ink-jet dyeing fabric obtained in the present invention has the following characteristics as compared with the conventional water-soluble polymer / water system.

(1) The fibers do not clump together in a bundle and there are many voids between the fibers, so that the ink droplets can be easily absorbed and held, and the leveling property is also improved.

(2) Since the water-soluble polymer is present in the form of flakes or fine particles in the spaces between the fibers and in the spaces of the knitted fabric, the surface area is increased, and the ink absorbs and thickens quickly, so that the bleeding prevention property is high. It is estimated that

Furthermore, the present invention does not add a specific additive for preventing bleeding to the ink, so that it has a feature that it is very versatile without deteriorating the dischargeability, and there is no limitation on the ink or material.

That is, the present invention is applicable to all inks in which water-insoluble dyes such as disperse dyes are dispersed and reactive dyes, and water-soluble dye inks such as acid dyes, if the ink system is a water-based medium. The method is not limited, and can be used for synthetic fibers (polyester, nylon, acrylic, etc.), natural plant fibers (cotton, hemp, etc.), animal fibers (silk, wool, etc.), and is a reasonable and versatile method. The fabric is not particularly limited, and examples thereof include a woven fabric, a knitted fabric, and a nonwoven fabric.

The water-soluble polymer referred to in the present invention can be classified into a natural paste and a synthetic water-soluble polymer.

Examples of the natural paste include starch, cellulose such as methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose and carboxymethylcellulose; gums such as locust bean, guar and tamarind; and sodium alginate.

As synthetic water-soluble polymers, polyvinyl alcohol,
Vinyl-based such as polyvinyl methyl ether, poly (meth) acrylic acid, poly (meth) acrylate, and water-soluble copolymers thereof, acrylics such as polyacrylamide, and styrene as a maleic acid copolymer, for example, Copolymers with vinyl acetate, polyvinyl pyrrolidone, polyethylene oxide and the like can be mentioned, and these may be used alone or in combination of two or more.

In general, the water-soluble polymer is almost determined by the dye used from the viewpoint of color development and degreasing. For example, when a reactive dye is used, carboxymethyl cellulose, sodium alginate, and poly (meth) acrylate are preferably used.

The amount of the water-soluble polymer applied is 0.1 to 5% by weight based on the fabric.
When the content is less than 0.1% by weight, the bleeding-preventing property is small, and when the content exceeds 5% by weight, the viscosity of the treatment liquid is excessively increased, the application method is limited, and the degreasing property and the coloring property are poor. Therefore 0.
A range of 5 to 3% by weight is preferably used.

Next, the water-soluble organic solvent referred to in the present invention is one having a solubility in water of 10% or more and a boiling point in the range of 60 to 250 ° C. For example, methyl alcohol, ethyl alcohol, propyl alcohol, butyl, ethylene glycol, diethylene glycol, propylene glycol, 1,3 butanediol, 1,4 butanediol, hexylene glycol, 2,3 butanediol, 1,2 butanediol, 1 , 2 propanediol, 1,5 pentanediol, neopentyl glycol,
N-methylpyrrolidone and the like.

Further, ethylene glycol, propylene glycol and the like are more preferably used as a water-soluble solvent having a boiling point in the range of 180 to 230 ° C.

If the boiling point exceeds 250 ° C, the normal drying process (100-150
℃) It is difficult to evaporate, and a water-soluble solvent remains in the cloth, impairing bleeding prevention.

On the other hand, when the boiling point is lower than 60 ° C., the evaporation rate is large and the workability is reduced. These water-soluble organic solvents are appropriately selected depending on the affinity with the water-soluble polymer to be used, the drying speed, and the like. According to the studies of the present inventors, examples of preferable combinations include sodium alginate / ethyl alcohol, sodium alginate / ethylene glycol, carboxymethyl cellulose / propylene glycol, sodium polyacrylate / hexylene glycol, and the like.

The use amount of the water-soluble organic solvent is 2 to 50%, preferably 5 to 50%.
20%.

Bleeding is prevented by the combined treatment of a water-soluble polymer and a water-soluble organic solvent, but it has been found that the prevention of bleeding is further improved when a foaming agent is further contained in this system. Further, the foaming agent referred to in the present invention can be broadly classified into one in which a compound is decomposed and releases gas, and one in which a gas substance is included.
Examples of the former which release oxygen include hydrogen peroxide, sodium perborate, etc., which release carbon dioxide, and those which release carbon dioxide, such as sodium hydrogencarbonate and ammonium hydrogencarbonate. Thermally expandable microcapsules containing a boiling-point hydrocarbon are exemplified.

An effective foaming agent is one that makes a water-soluble polymer film porous and devitrifies the film, and those that are water-soluble and release carbon dioxide gas in particular are inexpensive and preferably used.

The amount of the foaming agent used is 0 to 20%, preferably 0.5 to 5%.

The method of imparting the water-soluble polymer may be any method such as a pad method, a spray method, a coating method and a printing method, but from the viewpoint of preventing bleeding, it is preferable that the pretreatment agent is impregnated into the inside of the fiber structure. The pad method is the most excellent in terms of the processing uniformity.

In addition, a dyeing aid such as an acid, an alkali, a salt, and a reduction inhibitor and a filler such as inorganic fine particles may be added to the cloth as needed, for the purpose of improving color development.

The ink jet dyeing in the present invention is to discharge a liquid such as ink from a nozzle and to convert the discharged liquid into droplets for control and use. The method includes (1) a continuous discharge method (deflection type, (Divergent type) (2) On-demand type (pressure pulse type, bubble jet type, electrostatic discharge type), and any method may be used.

Although the optimum amount of ink to be applied depends on the fabric structure, it is usually preferable to apply 15 to 60 g / m ² when the basis weight of the fabric is 60 to 200 / m ² . When the amount of applied ink is small, a white field remains and the color developability decreases, and when the amount of applied ink is large, the prevention of bleeding increases. Therefore, it is necessary to set an optimal amount of application to a cloth.

The specific dyeing method of the present invention is a treatment solution of water-soluble polymer / water-soluble organic solvent or water-soluble polymer / water-soluble organic solvent /
The treatment liquid of the foaming agent is applied to the cloth, and the cloth is dried and inkjet dyed.

Next, a fixing process such as steaming is performed, and finally, a soaping process and a finishing process for removing a water-soluble polymer, a water-soluble organic solvent, and a foaming agent are performed to produce a product.

The steaming process, the soaping process, and the finishing process may be performed by generally known facilities and methods.

 Hereinafter, the present invention will be described in more detail with reference to examples.

[Examples] Examples 1-2 and Comparative Examples 1-3 Bleached and refined cotton fabric (broad: basis weight 81 g / m ² ) was used as a cellulose fiber and treated with the following pretreatment liquid (untreated: Comparative Example 1).

(1) Pretreatment liquid (Example 1) Sodium alginate 1% Ethylene glycol 10% Sodium carbonate 3% Deionized water 86% (Example 2) Sodium alginate 1% Ethylene glycol 10% Sodium carbonate 3% Sodium hydrogen carbonate 3% 83% ion exchanged water (Comparative Example 2) 1% sodium alginate 3% sodium carbonate 3% ion exchanged water 96% (Comparative Example 3) 1% sodium alginate 3% sodium bicarbonate 3% sodium carbonate 3% ion exchanged water 93% (Aperture ratio: 60%)-It was dried (130 ° C).

(2) Ink composition Dye 30% Ethylene glycol 20% Deionized water 50% As dyes: a. Remazol Turkey Blue G Liquid (Remazo)
l Turquoise Blue G Liquid) (manufactured by Hoechst) Cibacron Red 6B Liquid b. (Cibacron Red 6B Liquid) (manufactured by Ciba-Geigy) All were filtered under a 1 micron filter and then degassed under reduced pressure before use.

(3) Inkjet conditions Inkjet method: On-demand type Nozzle diameter: 75 microns Applied voltage: 60 V Drive frequency: 4000 Hz Resolution: 8 dots / mm (1) Inkjet pre-treated cloth and untreated cloth (comparative example) 1) was ink-jetted. next,
Fixing-soaping was performed.

(4) Fixing-soaping Steaming treatment with saturated steam at 100 ° C for 15 minutes. Then, it was washed with water, soaped at 80 ° C. for 5 minutes, and dried. The results are shown in Table 1.

(5) Measurement a. Color development K / S was determined from the following equation.

K / S = (1−R) ² / 2R The larger the value of K / S, the higher the color developability.

(R indicates the reflectance of the maximum absorption wavelength at 670 nm, where blue is measured.) B. Bleeding indicates the moving distance (mm) of the ink and indicates how much the ink has spread at the boundary between blue and red. Things. If it is 0.6 mm or less, a delicate image can be provided on the fabric.

As shown in Table 1, Comparative Example 1 was untreated and had the largest bleeding. Example 1 and Comparative Example 2 and Example 2 and Comparative Example 3 had substantially the same amount of adhesion after drying, but in all cases, the addition of the water-soluble organic solvent (ethylene glycol) of the present invention caused bleeding. Excellent preventive properties were observed. The present invention has reached the target of preventing bleeding of 0.6 mm or less.

 In addition, the present invention also has improved coloring properties as compared with Comparative Examples.

Examples 3 to 4 and Comparative Examples 4 to 6 Using bleached and refined silk fabrics (Habuta: 68 g / m ^{2 in} weight), the following pretreatment liquid was used to treat (untreated is a comparative example) 4).

(1) Pretreatment liquid (Example 3) Sodium alginate 1% Ethylene glycol 10% Ion exchange water 89% (Example 4) Sodium alginate 1% Ethylene glycol 10% Sodium hydrogen carbonate 3% Ion exchange water 86% (Comparative example) 5) Sodium alginate 1% Ion exchange water 99% (Comparative Example 6) Sodium alginate 1% Sodium bicarbonate 3% Ion exchange water 96% All were pad (squeezing ratio: 60%)-dried (130 ° C).

Next, treatment was performed in the same manner as in Examples 1 and 2 and Comparative Examples 1 and 3. The results are shown in Table 2.

As shown in Table 2, the results are almost the same as those of Examples 1 and 2 and Comparative Examples 1 and 3.

Comparative Example 4 is untreated and has the largest bleeding. Comparative Example 5
Is a single treatment of a water-soluble polymer, and Comparative Example 6 is a water-soluble polymer /
With the combined use of a foaming agent, the bleeding was slightly reduced as compared with Comparative Example 4, but was insufficient as compared with Examples 3 and 4 of the present invention. Example 4 of the present invention has slightly improved prevention of bleeding as compared with Example 3. That is, even in silk, the system of soluble polymer / water-soluble organic solvent / foaming agent is the most excellent in terms of prevention of bleeding and coloring.

Examples 5 to 8, Comparative Examples 7 to 8 The silk fabrics used in Examples 3 and 4 as fabrics were treated with the following pretreatment liquids.

Pretreatment liquid Fine gum MC-8 3% Water-soluble solvent 10% Deionized water 87% (Fine gum MC-8 is a carboxymethyl cellulose type: manufactured by Dai-ichi Kogyo Co.) Ethylene glycol as a water-soluble solvent (Example 5) ,
Example 3 except that propylene glycol (Example 6), ethyl alcohol (Example 7), methyl alcohol (Example 8), glycerin (Comparative Example 7), and tripropylene glycol (Comparative Example 8) were used. The treatment was performed in the same manner, and the results are shown in Table 3. As shown in Table 3, the water-soluble organic solvents having a boiling point in the range of 79 to 192 ° C. shown in Examples 5 to 7 were not used. Good bleeding prevention.

On the other hand, since those having a boiling point of 288 ° C. or higher in Comparative Examples 7 and 8 do not evaporate in the drying step, bleeding occurs after inkjet and during steaming, and bleeding is significantly increased.
Not preferred.

Examples 9 to 10, Comparative Examples 9 to 11 Fabrics made from polyester fiber (Ponzi: basis weight 120 g /
m ²⁾ using, except for using ammonium hydrogen carbonate as a blowing agent, were pretreated in Example 3-4, same as in Comparative Example 4-6 methods. Then, the treatment was performed under the following conditions.

(2) Ink composition Dye 10% 1.4 Butanediol 20% Ion-exchanged water 70% As dyes: a. CI Disperse Yellow
OW 42) 42 b. CI DISPERSE BLUE 5
6) Each of the 56 was filtered through a 1 micron filter and then degassed under reduced pressure before use.

(3) Inkjet conditions Same as in Examples 1 and 2. (4) Sticking-Soaping A steaming treatment at 170 ° C. of superheated steam for 7 minutes, followed by washing with water, ordinary reduction washing at 80 ° C., and drying. The results are shown in Table 4.

The bleeding measured the moving distance of the ink at the boundary between yellow and blue.

As shown in Table 4, even in the case of polyester fabrics, those pretreated with the water-soluble polymer / water-soluble organic solvent / (foaming agent) of Examples 9 to 10 of the present invention are water-soluble similarly to cotton and silk. Compared to the water-soluble polymer alone (Comparative Example 10) and the water-soluble polymer / foaming agent (Comparative Example 11), both the bleeding prevention and the coloring properties are superior.

(Effects of the Invention) Since the ink-jet fabric obtained by the present invention has excellent color-forming properties and good ink bleeding prevention properties, a dark and delicate image can be obtained.

Further, since the present invention does not require a special additive in the ink component, it is possible to achieve the prevention of bleeding only by pretreatment of the fabric without impairing the ejection performance, and it can be used for both natural fibers and synthetic fibers. .

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-170591 (JP, A) JP-A-53-145864 (JP, A) JP-A-63-162275 (JP, A) 8914 (JP, B1)

Claims (4)

(57) [Claims] 1. A process for producing an ink jet dyeing fabric, which comprises applying an aqueous treatment liquid containing a water-soluble polymer and a water-soluble organic solvent to the fabric and drying it. 2. A process for producing an ink jet dyeing fabric, comprising applying a water-based treatment liquid containing a water-soluble polymer, a water-soluble organic solvent and a foaming agent to the fabric and drying it. 3. The method according to claim 1, wherein the boiling point of the water-soluble organic solvent is from 60 to 250 ° C. 4. A dyeing method characterized by performing ink-jet dyeing using the ink-jet dyeing fabric obtained by the method according to any one of claims (1) to (3), followed by fixing and soaping.