JPH03113081A - Production of cloth for ink jet dyeing and dyeing method - Google Patents

Abstract

PURPOSE:To obtain the title cloth improved in ink blur preventivity, excellent in color developability and capable of giving dense, fine printed images by imparting a cloth with a water-base treatment liquid containing a water-soluble polymer and fine fibrous powder or porous fine powder. CONSTITUTION:A cloth of synthetic fiber or natural fiber is imparted with a water-based treatment liquid comprising (A) a water-soluble polymer (e.g. natural paste, synthetic water-soluble polymer) and fine fibrous powder or porous fine powder (pref. of cellulosic fiber) followed by drying, thus giving the objective cloth excellent in ink blur preventivity, good in color developability and capable of giving dense, fine printed images.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for producing an inkjet fabric and a dyeing method using the fabric, in order to impart a good quality image to the fabric during inkjet dyeing. It is.

[Prior Art] Traditionally, hand printing, roller printing, screen printing, transfer printing, etc. have been used as methods for forming patterns on fabrics, but all of them involve screens on which patterns have been formed in advance,
This method involves preparing an engraving roller and transfer paper. Also,
In recent years, inkjet printing methods have been developed in the field of paper printing and are already in practical use.

Pattern formation using the inkjet method can be created without spending time and money by combining it with a pattern reader and computer, so it is also used in the textile field.
It has attracted attention and attempts are being made to apply it directly to fabrics.

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

(1) Perform bleed prevention treatment to obtain delicate images on fabric.

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

(3) Level dyeing properties can be obtained by applying a small amount of ink.

(4) Ink discharge must be stable.

The present inventors have already proposed the following method for preventing inkjet bleeding.

(A) A method using special pretreatment on the fabric.

(B) Method using special ink.

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

Regarding (A), water-repellent treatment to prevent ink migration (Japanese Patent Publication No. 60-99081) and water-soluble polymer treatment to improve the water retention of fabrics (Japanese Patent Publication No. 63-315)
Publication No. 92), etc.

Regarding (B), prevention of bleeding by ink with specific viscosity behavior (Japanese Unexamined Patent Publication No. 101669/1983).

Regarding (C), the movement of ink is reduced from both the fabric and the ink.
Among them, if the ink requires some kind of additive, even if the effect of preventing bleeding is great, the ejection performance of the ink is often deteriorated. That is, additives increase ink viscosity, increase stickiness, increase insoluble components, etc., resulting in a decrease in ink ejection performance and reliability.

On the other hand, pre-treatment of the fabric alone does not provide sufficient bleeding prevention effect and high color development. According to studies conducted by the present inventors, in order to obtain a deep color, either the amount of ink applied must be increased or the dye concentration in the ink must be increased. Increasing the amount of applied ink increases bleeding, and increasing the dye concentration in the ink reduces ejection performance.

Therefore, even if each factor alone can be satisfied in inkjet bleeding prevention, high dyeing properties, level dyeing properties, and ink ejection performance, it is currently not possible to satisfy all of the factors.

[Problems to be Solved by the Invention] In order to solve these problems, especially the prevention of inkjet bleeding, high color development, level dyeing properties, and ink ejection stability, the present inventors have conducted various studies and found that water-soluble The present inventors have discovered that by ink-jetting a pretreated fabric with a treatment solution containing a water-soluble polymer and a specific water-soluble solvent, it is possible to avoid the above-mentioned problems and satisfy all factors, and have thus arrived at the present invention.

An object of the present invention is to provide a method for producing a fabric for inkjet dyeing and a dyeing method for obtaining a high-quality image that has excellent ink ejection stability, prevents bleeding, and has high color development. .

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

(1) A method for producing a fabric for inkjet dyeing, which comprises applying an aqueous treatment liquid containing a water-soluble polymer and a fine fibrous powder or a porous fine powder to the fabric, and drying the fabric.

(2) The method for producing a fabric for inkjet dyeing according to (1), wherein the fine fibrous powder or porous fine powder is cellulose powder.

(3) A dyeing method characterized by inkjet dyeing using the inkjet dyeing fabric obtained by the manufacturing method described in (1) to (2) above, followed by fixation and soaping treatment.

The present invention will be explained in detail below.

Normally, when an aqueous solution of a water-soluble polymer as a pre-treatment agent is squeezed with a mangle, at the moment of squeezing, the water-soluble polymer is almost uniformly distributed over the entire surface of the fabric, that is, the surface, inside, and voids at a constant rate. Thereafter, the water-soluble polymer in the fabric is heated and dried and solidified in a drying process. In this case, as the water evaporates from the surface of the water-soluble polymer, the viscosity increases and the volume decreases, and the surface tension gradually pulls the fibers together and retreats into the interior, eventually causing the fibers to close together. It becomes a solid material that fills the fiber bundle in the form of an adhesive. Such movement during the drying process is called migration. As a result, after drying, a large amount of water-soluble polymer is attached to the surface and inside of the fiber bundle, but almost none is attached to the voids of the knitted fabric structure.

When inkjet is applied to this fabric, the ink diffuses across the surface of the bundled fibers faster than the water-soluble polymer absorbs the ink, running between the threads and spreading, even when a large amount of water-soluble polymer is applied. The bleeding is difficult to stop, and a satisfactory quality cannot be obtained. In addition, in the case of inorganic substances as fillers often used in paper etc., the usual addition as described above,
In the drying method, almost no adhesive is attached to the voids in the knitted fabric structure.

As a result of various studies to solve these problems, the present inventors arrived at the present invention with the prospect of solving the problems by making the water-soluble polymer in a preferable adhesion state from the viewpoint of preventing bleeding. . That is, the preferred state of adhesion of the water-soluble polymer is such that the surface, interior, and voids of the fabric are covered with a flaky film that quickly absorbs and thickens the ink.

The present inventors have found that by using a water-soluble polymer and a fine fibrous powder or a porous fine powder in combination, it has a synergistic effect and is more effective in preventing bleeding than when each pretreatment is performed alone. I found it.

This is because when a water-soluble polymer and a fine fibrous powder or a porous fine powder are treated together, the water-soluble polymer alone hardly adheres to the voids of the knitted fabric structure, but the fine fibrous powder Alternatively, if porous fine powder is present, it is presumed that the water-soluble polymer and fine fibrous powder or porous fine powder are filled in a form that bridges the voids in the knitted fabric structure. In other words, the present invention is applicable to all inks containing water-insoluble dyes such as disperse dyes and water-soluble dye inks such as reactive dyes and acid dyes, as long as they are based on aquatic media. It is a rational and versatile method that can be used for synthetic fibers (polyester, nylon, acrylic, etc.), natural plant fibers (cotton, linen, etc.), animal fibers (silk, wool, etc.) without limitation.

The fabric is not particularly limited, and includes woven fabrics, knitted fabrics, non-woven fabrics, and the like.

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

Natural thickeners include starch, cellulose such as methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose, gum such as locust bean, guar, and tamarind, and sodium alginate.

Synthetic water-soluble polymers include vinyl-based polymers such as polyvinyl alcohol and polyvinyl alcohol ether, poly(meth)acrylic acid, poly(meth)acrylates, water-soluble copolymers thereof, and acrylic-based polymers such as polyacrylamide. , maleic acid copolymer such as styrene,
Examples include copolymers with vinyl acetate, polyvinylpyrrolidone, polyethylene oxide, etc., and they may be used alone or in combination of two or more.

Generally, water-soluble polymers are determined by the dye used in terms of color development and desizing properties. For example, when using reactive dyes, carboxymethylcellulose, sodium alginate, and poly(meth)acrylates are preferably used.

The amount of water-soluble polymer applied is 0.1 to 5% by weight based on the fabric.
If it is less than 0.1% by weight, the bleeding prevention property is low;
If it exceeds % by weight, the viscosity of the treatment liquid increases too much, which limits the application method and causes poor desizing properties and color development. Therefore, a range of 0.5 to 3% by weight is preferably used.

The fine fibrous powder and porous fine powder referred to in the present invention are:
It is granular or fibrous (fibril-like, pile-like, fluff-like), and is a particulate fiber made of general natural fibers or synthetic fibers (hereinafter abbreviated as particulate fiber). Cellulose fiber powder is used as the natural fiber, and ultrafine fibers such as polyester, polyamide, acrylic, etc. are used as the synthetic fiber.

The ultrafine fibers are in the form of fine particles with a denier of 1 denier or less and a diameter of 15 μm or less. Although the fine particulate fibers are not particularly limited, preferred examples include cellulose-based fibers, protein-based fibers, synthetic polymers such as vinylon, hydrophilic polyamide, and superabsorbent resins such as cross-linked and low-swelling fine particles that are water-dispersible. You can use what you can. Particularly preferred is cellulose fiber (natural cellulose or regenerated cellulose).

Further, the long diameter of the fine particle fibers is 300μ or less, more preferably 100μ or less, and even more preferably 30μ or less. If it exceeds 300μ, the particles become large and tend to harden, making uniform dispersion difficult. At the same time, the fabric becomes fluffy and tends to come into contact with the nozzle during inkjet, resulting in undesirable printing irregularities.

The amount of fine particle fibers applied is 0.1 to 15% by weight, preferably 2 to 10% by weight, based on the fabric.

If it is less than 0.1% by weight, the bleeding prevention property will be low, and if it is less than 15% by weight.
If it exceeds 100%, the viscosity of the treatment liquid will increase too much, and the application method will be limited, and the color development will be poor.

The blending ratio of water-soluble polymer and fine particle fiber is 0. It is 5 to 20 times, preferably 2 to 10 times.

Particulate fibers made of natural and synthetic fibers are dyed in the same way as natural and synthetic fibers. Therefore, it is not preferable that the fabric and the fine particle fibers are made of the same material. That is, the relationship between the dye to be dyed (fabric), the dye used, the dyeing aid, and the particulate fibers is carefully considered, and an appropriate dye is selected that does not inhibit the dyeability of the dye.

According to the studies of the present inventors, as examples of preferred combinations, when the dyed material is silk fabric, the dye used is a reactive dye and neutral dyeing, the fine particle fibers are linen, cotton, and polyester, and the dyed material is silk. The same applies to textiles and when the dye used is acidic.

Further, when the object to be dyed is polyester fiber, examples of the fine particle fiber include linen, cotton, etc.

The treatment liquid consisting of water-soluble polymer and fine particle fibers can be applied by any method such as pad method, spray method, coating method or printing method, but from the viewpoint of preventing bleeding,
It is preferable that the pretreatment agent be impregnated into the inside of the fiber structure, and the pad method is the best in this respect and in terms of uniformity of treatment.

In addition, if necessary, dyeing aids such as acids, alkalis, salts, water-soluble solvents, and anti-reduction agents are added to the fabric for the purpose of improving color development, etc., and fillers such as inorganic fine particles for the purpose of preventing bleeding. A blowing agent may be added.

The inkjet dyeing referred to in the present invention is a method in which a liquid such as ink is ejected from a nozzle, and the ejected liquid is turned into droplets, which is controlled and utilized.The methods include (1) continuous ejection method (deflection type, Divergence type) (2) On-demand type (pressure pulse type, bubble jet type, electrostatic discharge type), and any method may be used.

The optimal amount of ink applied depends on the fabric structure, but if the fabric weight is 60 to 200/lrr, it is usually 15 to 60 g/rr.
It is better to give f. If the amount of ink applied is small, hot water remains and the color development is reduced, and if the amount of ink applied is large, the prevention of bleeding becomes greater, so it is necessary to set the optimum amount of application depending on the fabric.

The specific dyeing method of the present invention is to apply a treatment liquid consisting of a water-soluble polymer/fine fibrous powder or porous fine powder to a fabric, dry it, inkjet dye the resulting fabric, and then use steaming, etc. Finally, the product is manufactured using soaping and finishing treatments to remove water-soluble polymers and particulate fibers.

The steaming treatment, soaping treatment and finishing treatment may be performed using generally known equipment and methods.

Hereinafter, the present invention will be explained in detail with reference to Examples.

[Examples Examples 1 to 2, Comparative Examples 1 to 3 Bleached and refined silk fabrics (satin second stitch weight 95 g/durable) and cotton fabrics (twill: basis weight 125 g/I) were treated with the following pretreatment solution. (The untreated sample is Comparative Example 1).

The silk fabric was treated in Example 1 and Comparative Examples 1 to 2, and the cotton fabric was treated in Example 2 and Comparative Examples 1.3.

(1) Pretreatment liquid (Example 1) Sodium alginate 1% Cellulose powder 10% Ion exchange water 89% (Example 2) Sodium alginate 1% Ultrafine polyester pile 10% Sodium carbonate 3% Ion exchange water 86% (Comparative example 2) Sodium alginate 1% Ion exchange water 99% (Comparative example 3) Sodium alginate 1% Sodium carbonate 3% Ion exchange water 96% (Cellulose powder: 50μ hemp, fibril shape,
Manufactured by Tosco, polyester pile: 0.2d.

Pile length: average 75μ, fibrous
)did.

(2) Ink composition Dye 30% Ethylene glycol 20% Ion exchange water 50% Dyes include a, Remazol Turkis Blue G Liquid (Re
mazol TurquoiseBlue G
Liquid) (manufactured by Hoechst) Cibacron Red 6B Liquid b, (Cibacron Red 6BLiqui
d) (Ciba, manufactured by Geigy) Both were filtered through a 1 micron filter and degassed under reduced pressure before use.

(3) Inkjet conditions Inkjet method: On-demand type Nozzle diameter: 75 microns Applied voltage: 60V Driving frequency: 4000Hz Resolution: 8 dots/mm
) was used for inkjet printing. Next, fixation-soaping was performed for dyeing.

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

(5) Measurement a3 color development /S was determined using the following formula.

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

(R measures blue and indicates the reflectance at the maximum absorption wavelength of 670 nm) b. Bleeding indicates the distance the ink moves (mm) and indicates how far the ink spreads at the boundary between blue and red. It is something. If it is 0.6 mm or less, a delicate image can be imparted to the fabric.

As shown in Table 1, Comparative Example 1 was untreated and had the largest amount of bleeding. Example 1 and Comparative Example 2 Also, Example 2 and Comparative Example 3
When comparing the above, it was found that in both cases, the addition of the fine particle fiber according to the present invention was superior in preventing bleeding. The method of the present invention achieved the Q of 6 mm or less, which is the target for preventing bleeding, and a delicate image was obtained. Also, in terms of color development, the method of the present invention is superior to the comparative examples on both silk and cotton.

Table 1 Inkjet on Silk and Cotton (Effects of the Invention) The inkjet fabric obtained by the present invention has excellent color development and good ink bleed prevention properties, so that dark and delicate images can be obtained.

Furthermore, since the present invention does not require any special additives in the ink components, it can be used for both natural fibers and synthetic fibers without impairing ejection performance.

Claims (3)

[Claims] (1) A method for producing a fabric for inkjet dyeing, which comprises applying an aqueous treatment liquid containing a water-soluble polymer and a fine fibrous powder or a porous fine powder to the fabric, and drying the fabric. (2) The method for producing a fabric for inkjet dyeing according to claim (1), wherein the fine fibrous powder or porous fine powder is cellulose powder. (3) A dyeing method characterized by inkjet dyeing using the fabric for inkjet dyeing obtained by the manufacturing method described in claims (1) to (2), followed by fixation and soaping treatment.