JPH05311583A - Method for ink jet dyeing - Google Patents

Abstract

PURPOSE:To carry out the dyeing with a high dyeing efficiency without bleeding a dye and impairing the hand of a fabric by preapplying a highly water absorbing highly polymeric substance to a fabric for ink jet dyeing. CONSTITUTION:A textile fabric is dyed with ink jets. In the process a highly water absorbing highly polymeric substance, e.g. an acrylic acid-vinyl alcohol copolymer or sodium acrylate polymer, insoluble in water and capable of absorbing a large amount of water is preapplied onto the fabric to afford the objective dyed fabric excellent in waterproofness with a high dyeing efficiency without bleeding the ink of the dye and impairing the hand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet dyeing method for clearly and efficiently dyeing various patterns on a surface of a fabric such as a knitted woven fabric or a nonwoven fabric made of various fibers by inkjet.

[0002]

2. Description of the Related Art A method for efficiently dyeing various patterns on a fabric surface such as a knitted woven fabric or a non-woven fabric by using an ink jet which has been developed for printing on a paper surface is disclosed in, for example, Japanese Patent Laid-Open No. 54-18957. In the dyeing field, multifaceted development toward practical use is underway.

As one example, various attempts have been made to prevent dye bleeding on the fabric surface, which is of greatest concern in ink jet dyeing of fabrics. In general, it is expected that the bleeding on the fabric surface will be reduced if the viscosity of the dye ink is increased, but the ink is likely to be clogged in the ink jet nozzle, and the nozzle management is not only complicated but also a smooth operation is not possible. I can't expect.

It is also conceivable to instantly evaporate the solvent and the like to prevent bleeding as soon as the dye ink reaches the surface of the cloth, but in this case, the cloth needs to be preheated to a high temperature during dyeing. As a result, not only the fabric is easily damaged, but the dye may be deteriorated and the product may be deteriorated.

In addition to such bleeding preventing means, for example, in Japanese Patent Publication No. 63-31594, a bleeding preventive agent having a dye-holding property and a dye-retaining property is previously attached to a fabric surface to prevent bleeding of dye ink. A method is disclosed. That is, at least one compound selected from the group of water-soluble polymers, water-soluble salts and water-insoluble inorganic fine particles, which are substantially non-dyeing to dyes and retain dyes, is pretreated with cloth. After applying 0.1 to 50% to the surface to be dyed, a dye ink is applied by an inkjet method,
Next, a dyeing method by an inkjet method in which the compound is washed and removed after fixing and heat treatment.

[0006]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 63-31
According to the dyeing method disclosed in Japanese Patent No. 594, it is an effective means in that there is no fear of nozzle clogging and the deterioration of the product does not occur, but the dye held on the anti-bleeding agent is dyed to the fabric surface. Although the mechanism has not been clarified, it cannot be denied that the dyeing ratio of the dye is lower than the dyeing ratio with the same dye in the past, and further, the anti-bleeding agent with high dye holding property fixes the dye after heat treatment. It is undeniable that since the dye is removed by washing, the dye is also removed at the same time as the dye is removed by washing, and the dyeing efficiency tends to be further reduced.

The present invention was developed in view of the above situation, and as with the dyeing method disclosed in the above Japanese Patent Publication No. 63-31594, dye bleeding can be prevented by using an anti-bleeding agent specific to the present invention. It is an object of the present invention to provide an inkjet dyeing method in which the dyeing efficiency is high, the texture of the fabric is not impaired, and a secondary effect can be expected in the dyed product.

[0008]

In order to achieve the above-mentioned object, in the present invention, when a textile made of fibers is dyed by adopting an ink jet method, a super absorbent polymer is applied to the textile in advance. An ink jet dyeing method characterized by the above is a main constitution.

The present invention will be described in detail below together with its operation. The inkjet method applied to the present invention is not particularly limited, but a typical method is to apply a strong electric field between the nozzle and the acceleration electrode in front of the nozzle, and to apply ink particles from the nozzle according to the information signal. Electrostatic suction method that ejects ink, ultrasonic vibration method that ejects ink supplied at high pressure from a nozzle that vibrates by a crystal oscillator in the form of fine particles according to an information signal, and gives an electric signal to a piezo element to ink There is a piezo element method in which pressure is applied to eject from a nozzle.

As the ink, known dyes such as direct dyes, acid dyes, chrome dyes, reactive dyes, disperse dyes, and cationic dyes are appropriately used according to the type of dyed fiber. In addition to the medium, it is prepared by adding various known additives such as anti-drying agents such as glycols, dye dissolving agents, physical property adjusting agents, preservatives, bactericides and chelating agents.

However, if a pattern is printed on a fiber cloth by an ink jet method using only the dye ink adjusted as described above, the bleeding of the dye is severe and it is difficult to commercialize it. Therefore, in the present invention, the bleeding performance is improved without impairing the texture of the fabric itself as the adherend,
The dye is not diffused at least until dyeing.

The anti-bleeding agent used in the present invention is a polymer compound that is insoluble in water and absorbs a large amount of water, that is, a so-called super absorbent polymer, such as vinyl acrylate, Sodium acrylate polymer, starch / acrylic acid graft copolymer crosslinked product,
Polymer compounds such as cross-linked polyacrylic acid salts may be mentioned.
The means for applying the anti-bleeding agent to the fabric is not particularly limited, and for example, means such as coating, dipping, spraying or the like is adopted.

These highly water-absorbing water-insoluble polymer compounds have the property of instantaneously absorbing tens to thousands of times their own weight of water and gelling. Therefore, if these superabsorbent polymers are applied to the fabric in advance, the dye ink ejected from the inkjet nozzle onto the fabric surface will be temporarily absorbed and held by the superabsorbent polymer. Moreover, even if the amount of the superabsorbent polymer compound applied is extremely small, the intended purpose can be sufficiently achieved. Then, at the time of dyeing and fixing, the water temporarily absorbed in the superabsorbent polymer evaporates and the dye held in the compound binds to the fiber to fix the color, and the superabsorbent polymer also Adhesively fixed to the fabric surface.

Since the amount of the superabsorbent polymer compound thus adhered and fixed to the fabric surface is small, not only does the texture of the fabric be impaired, but also because the compound is present on the surface of the fabric, the raindrops adhering to the surface are removed from the back surface. It was found to have an excellent secondary effect of not allowing the light to pass through.

After the color has been fixed, the dyeing process is often finished through a drying step. In this case as well, the above superabsorbent polymer compound which is the anti-bleeding agent fixed to the fabric remains on the fabric without being removed, Since the polymer compound is inserted between the fibers and fixed, the cloth has excellent waterproofness.

[0016]

EXAMPLES The present invention will be specifically described below based on examples.

Example 1, Comparative Examples 1-2 Sumika gel was applied to a textured yarn woven fabric made of polyester fiber.
SP510 (“Example 1”, Sumitomo Chemical, vinyl alcohol acrylate copolymer), gum arabic (Comparative Example 1), and montmorillonite (Comparative Example 2) each in an aqueous solution of 10 g / l (however, Example 1 is opaque). A gel dispersion) was prepared, and a processed yarn woven fabric made of polyester fiber was dipped in these liquids, pad-treated with a squeezing ratio of 60%, and then dried under drying conditions of 100 ° C. for 10 minutes. The cloth subjected to these treatments was dyed under the following conditions.

Disperse dye ink composition Dianix Black FG-P 10 wt% (manufactured by Mitsubishi Kasei Hoechst: Disperse dye) Polyethylene glycol (average molecular weight 400) 15 wt% Glycerin 15 wt% Ion-exchanged water 60 wt% Mixture of the above composition Is crushed at room temperature using a fine grinder such as a sand grinder or paint conditioner, and filtered with a glass filter 11P5VF (manufactured by Iwaki Glass Co., Ltd., maximum pore size of about 1.0 μm) to prepare a disperse dye ink. did.

Inkjet printing conditions Inkjet method: On-demand method Nozzle diameter: 60 μm Dot density: 180 dots / inch (vertical,
Horizontal) Distance between nozzle and cloth: 1 mm Dyeing conditions The printed cloth was colored under the following conditions, and then reduced and washed, and then washed with water, neutralized, washed with water and dried. Color development conditions: Dry heat 200 ° C x 3 minutes Reduction cleaning: Hydrosulfite 0.5 g / l Sodium hydroxide 1.0 g / l Immersion treatment at 90 ° C x 20 minutes in a bath prepared with the ratio of the above chemicals . Neutralization conditions: 60 ° C x 10 in acetic acid solution (0.1 g / l)
Soaked for a minute.

Result

[0021]

[Table 1]

As is apparent from Table 1 above, there is no bleeding in the present invention, and bleeding is recognized in the comparative example.
It is also understood that the L value of the present invention is lower than that of the comparative example.

Example 2 and Comparative Examples 3 to 4 Sunwet IM-1000MPS (“Example 2”, manufactured by Sanyo Chemical Co., Ltd., starch Acrylic acid graft copolymer cross-linked product), gum arabic (Comparative Example 3), and montmorillonite (Comparative Example 4) were each prepared as an aqueous solution of 10 g / l (however, Example 1 was an opaque gel dispersion liquid),
The processed yarn woven fabric made of cellulosic fibers is dipped in these liquids, pad-treated with a draw ratio of 60%, and then 10
It was dried under the drying condition of 0 ° C. × 10 minutes. Dyeing was performed under the following conditions on the cloth that had been subjected to these treatments.

Reactive dye ink composition CIReactive Black5 (reactive dye) 10% by weight Polyethylene glycol (average molecular weight 400) 15% by weight Glycerin 15% by weight Ion-exchanged water 60% by weight A mixture of the above components is stirred at room temperature. Glass filter 11P5VF (Iwaki Glass Co., Ltd., maximum pore size 1.0μ)
m) was filtered to prepare a reactive dye ink.

Inkjet printing conditions Inkjet method: On-demand method Nozzle diameter: 60 μm Dot density: 180 dots / inch (vertical,
Horizontal) Distance between nozzle and cloth: 1 mm Dyeing conditions The printed cloth is colored by steaming at 100 ° C. for 15 minutes with saturated steam, then washed with water, and washed with acetic acid solution (0.
Neutralization / washing with hot water at 90 ° C. for 10 minutes at 1 g / l), washing with water and drying.

Result

[0027]

[Table 2]

It can be seen from Table 2 as well as in Table 1 that the anti-bleeding property of the method of the present invention is superior to that of the comparative example.

[0029]

As is clear from the above description, according to the present invention, the dye ink bleeding on the fabric can be completely prevented and the bleeding of the dye ink on the fabric can be completely prevented by adding a slight amount of the bleeding inhibitor to the fabric. Even if the anti-bleeding agent is not removed by washing or the like, since the applied amount is small, the texture of the fabric is maintained and the waterproof property is excellent.

Claims (1)

[Claims] 1. A method for inkjet dyeing, wherein when a textile made of fiber is dyed using an inkjet method, a high water-absorbing polymer substance is applied to the cloth in advance.