WO2001075206A1

WO2001075206A1 - Inkjet printing device, inkjet printing method, and inkjet-printed fabric

Info

Publication number: WO2001075206A1
Application number: PCT/JP2001/002538
Authority: WO
Inventors: Takayuki Hayami
Original assignee: Kanebo, Limited; Kanebo Spinning Corporation
Priority date: 2000-03-30
Filing date: 2001-03-28
Publication date: 2001-10-11
Also published as: JPWO2001075206A1; AU2001244574A1

Abstract

An inkjet printing device comprising a printing section having an inkjet nozzle for delivering printing ink to a fabric, a fabric feeding section for feeding a fabric to the printing section, and a drying section for drying the fabric printed in the printing section, the device being characterized in that a heating section is installed downstream of and in close proximity to the drying section for heat-treating the fabric.

Description

Description Ink-jet printing device, ink-jet printing method, and ink-jet printing cloth

Technical field

TECHNICAL FIELD The present invention relates to a printing apparatus using an ink jet system, an ink jet printing method, and a fabric printed by such a method. Background art

Conventionally, screen printing, roller printing, one-to-one screen printing, transfer printing, etc. have been used as the method of printing designs on fabrics. However, in these printing methods, it is necessary to prepare a screen frame, engraving roller, transfer paper, etc. every time the pattern is changed, and the screen frame, engraving roller, and transfer paper are extremely expensive to produce. It had the drawback that it would be uneconomical to produce a lot of lots and that it could not respond quickly to diversification of fashion. In order to solve these drawbacks, an ink jet printing technique is used in which image processing is performed on a computer by means such as sample reading with a scanner or image creation using computer software, and the result is printed by an ink jet method. Has been developed. As an example of such an ink jet printing technique, a method described in JP-A-6-270401 is known.

FIG. 2 shows an embodiment of a conventional ink jet printing apparatus described in this document.

First, the cloth to be printed (1) sent from the cloth supply section (4) is transferred in the direction of the downstream printing section (3), and based on a digital signal transmitted from an information processing section such as a workstation. From the moving inkjet nozzle (2) The ink is ejected and applied to the fabric (1).

Thereafter, the cloth (1) passes through the drying section (5) to be dried so as to have a desired moisture content, and is further collected by a cloth collecting means (8) such as a take-up roller. The fabric (1) to which the dye ink has been applied in this manner is subsequently supplied to a coloring and fixing means such as a moist heat treatment apparatus generally used in a dyeing and printing process, and then subjected to a coloring and fixing process. The product is properly cleaned and finished to produce a product.

However, in the case of the above-mentioned method, usually, the coloring and fixing process involves batch processing of a plurality of fabric rolls wound up through the printing process, so that depending on the fabric rolls, the storage location and the elapsed time after drying may differ. As a result, there is a problem that even when the color development and fixing treatments are performed under the same conditions, a difference occurs in the density and the color tone, so that a product having a uniform print quality cannot be provided.

The ink jet printing method is a printing method having an excellent advantage that a very fine pattern can be clearly printed as compared with other conventional printing methods. Therefore, when a difference in density or color tone occurs, the advantages of such an ink jet printing method cannot be fully utilized, and a high-quality printed fabric may not be obtained. For this reason, in the ink jet printing method, improvement of such a point is particularly required.

In addition, when heating the fabric collected by winding or the like after the printing process, the labor of moving the fabric is required, the transportation time is required, and the storage place before heating is secured. From the viewpoint of necessity, etc., it is not desirable to collect the fabric after the ink jet printing.

The present invention has been made in view of the above-described problems, and it is an ink jet printing apparatus capable of reducing differences in density and color tone between lots and simplifying the process, and a density between lots. Ink jet printing method with little difference in color and color tone and high quality ink jet printing fabric with little difference in density and color tone between mouths It is the purpose. Disclosure of the invention

The above object is to provide a printing section having an ink jet nozzle for discharging a dye ink onto the cloth, a cloth supply section for supplying the cloth to the printing section side, and a drying section for drying the cloth printed by the printing section. This is achieved by an ink jet printing apparatus including a heating section provided on the downstream side of the drying section for heat-treating the fabric. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic view showing an ink jet printing apparatus of the present invention, and FIG. 2 is a schematic view showing a conventional ink jet printing apparatus.

1 in the figure indicates a fabric. 2 in the figure indicates an inkjet nozzle. 3 in the figure indicates the printed part. 4 in the figure indicates a cloth supply unit. 5 in the figure indicates a drying section. 6 in the figure indicates the heating section. Reference numeral 7 in the figure denotes a fabric holding roller. Reference numeral 8 in the figure denotes a cloth collecting means. 9 in the figure indicates the direction of cloth movement. BEST MODE FOR CARRYING OUT THE INVENTION

First, an inkjet printing apparatus according to claim 1 will be described.

As shown in FIG. 1, the ink jet printing apparatus of the present invention comprises a printing section (3) having an ink jet nozzle group (2) for discharging a dye ink onto a cloth (1), and a cloth (2). (3) a fabric supply unit (4) for supplying to the side, and a drying unit (5) for drying the fabric (2) printed by the printing unit (3), and further comprising the drying unit (5). A heating section (6) for heat-treating the fabric (1) is provided downstream of the heating section.

The fabric (1) is not particularly limited, and may be in the form of a woven fabric, a knitted fabric, a non-woven fabric, or the like, as long as it is colored with a dye. The fiber used as a raw material is not particularly limited. Specifically, natural fibers such as cotton, wool, silk, hemp, rayon, semi-synthetic fibers such as acetate and triacetate, polyester, nylon, acrylic, etc. And synthetic fibers of various types, mixed fibers of various fibers, and interwoven fabrics.

Further, in order to obtain a clear image, it is desirable that the nap or raising of the fabric be as small as possible. Fluff length 'Saga 0 of the surface of the fabric to be used for this. With is 9 mm or less, 0.5 to 0. Fluff fluff density length of 9 mm is at 3 0 present Z mm ² or less, and It is desirable that the fuzz density of the fuzz having a length of less than 0.5 mm be not more than 30 pieces / 10 cm ² .

In order to satisfy such conditions, use a long-fiber woven fabric. It is desirable to carry out processing such as shaving treatment after preparation such as scalpel baking treatment, raw cloth baking + refining.

First, the fabric comprises (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 hydrostatic agent. Pretreatment with a dispersed or dissolved treatment liquid (hereinafter referred to as pretreatment agent). Methods of applying the treatment liquid include a padding method, a spray method, a coating method, and the like. It is desirable to do.

When a water repellent is used, the type of the water repellent is not particularly limited, and any of general water repellents such as a fluorine compound, a silicon compound and a zirconium compound can be used.

When a water-repellent softener is used, the type of the water-repellent softener is not particularly limited, and examples thereof include octadecylethylene urea, zirconium acetate, polyolefin-based compounds, wax-based compounds, and silicone-based compounds.

The amount of the water repellent and / or the soft water repellent used is such that the water absorbency is 5 seconds or more and 240 seconds or less according to the JISL 1096A method (drip method). Less than 5 seconds When the time exceeds 240 seconds, the sharpness and levelness are not improved.

In the present invention, a hydrotope agent may be used in order to improve fixability and levelness. Specific examples of such hydrotope agents include urea, monomethylurea, dimethylurea, thiourea, monomethylthiourea, dimethylthiourea, formamide, dimethylformamide, dimethylacetamide and the like. Of these, urea is most preferably used. The amount of these hydrotope agents used is such that, when a prescription is made for the padding method, it is fixed at 0 :! to 30% by mass based on the mass of the fabric. When the amount is less than 0.1% by mass, the fixability and the leveling property are not improved, and when the amount is more than 30% by mass, it is not economical for the effect and the subsequent handling becomes difficult.

The pretreatment agent may be added with a fixing reactant, for example, an alkaline substance such as sodium carbonate or sodium hydrogen carbonate.

Further, in the water repellent treatment, at least one selected from a water repellent and a soft water repellent may be used in combination with a sizing agent. Examples of the sizing agent include starch, solubilized starch, and water-soluble. Water-soluble cellulose derivatives such as starch, water-soluble starch derivatives, carboxymethylcellulose, etherified carboxymethylcellulose, hydroxyethyl cellulose, and methylcellulose; , Gelatin, glue, etc., water-soluble proteins, sodium polyacrylate, polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, quaternized water-soluble synthetic polymers such as cationic polymers Compounds can be used. Further, the use of the rubbing treatment can prevent bleeding of the dyeing liquor. In particular, it is preferable to use at least one selected from carboxymethylcellulose, etherified carboxymethylcellulose and sodium alginate and at least one selected from a water-soluble acryl-based resin and a maleic-acid-based resin as the paste. The printing section (3) is a section for receiving an image signal output by an image processing device (not shown) such as a personal computer, and printing the cloth with an ink jet nozzle. Specifically, the printing section (3) includes an ink jet nozzle group (2) that can reciprocate in the width direction of the fabric (1). By printing a plurality of colors of ink from the inkjet nozzle group (2), textile printing is performed.

The method of the above-mentioned ink jet nozzle is not particularly limited, but specific methods that can be used include: (A) a heating resistor element is embedded in the nozzle, the ink is boiled by the heat generated, and the pressure of the bubble is used. A bubble jet method for discharging ink, (B) a pulse jet method for applying an electric signal to the piezoelectric element to deform it and excite a change in the volume of the ink chamber to discharge ink particles, and (C) ultrasonic vibration. The ink is continuously ejected from the nozzles under pressure to form particles, and the particles are controlled to the amount of charge. The particles are deflected during constant electrolysis, and are recorded separately for recording and non-recording particles.

Dye ink is supplied from a dye tank to each of the nozzles constituting the ink jet nozzle group (2). As the dye, it is desirable to use four primary colors of yellow, magenta, and cyan and four colors of black (black color), whereby it is possible to express 125 or more compound colors.

As these dyes, dyes (I to IV) having a perceived chromaticity index defined in the CIE 197 (L, a, b) space on the fabric at least in the following range are used. preferable.

I Yellow: (a) — 20 to 0 () 50 to 90

II red: (a) 50 to 70 (b) 0 to 20

III Bulletin: (a) — 5 0 1 0 () 1 50 to 20

IV Black: (a) — 6-6 (b) — 6-6

These dyes may be used in combination of two or more dyes of each color. Dyes in the range described above may be used in combination.

V Yellow: (a) 0 to 20 (b) 50 to 90

VI Yellow 1: (a) 20 ~ 70 (b) 40 ~ 90

(Orange)

VII red: (a) 50 to 70 (b)-200

VIII Blue: (a) — 10 to 20 (b) 50 200

IX nozzle: (a) 20 to 70 (b) — 50 20

X Green: (a) — 700-200 (b) 50-90

XI Navigable: (a) — 10 to 10 (b) — 20 to 5 The above four light-colored inks and special colors such as violet, orange, and green are used depending on the required printing quality. Can be

In particular, the perceived chromaticity index defined in the CIE 197 6 (L, a, b) space on fabric is in the following range. It has been found that a clear printed fabric can be obtained.

1. Yellow 1: (a) — 20 ~ 0, (b) 50 ~ 90

2 Yellow 1 2 (a) 0 ~ 20, (b) 5 0 ~ 90

Or (a) 40-60, (b) 40-80

3 Red 1 (a) 50-70, (b) 0--20

4 Red 2 (a) 50 to 70, (b) — 20 to 0

5 Blue 1 (a)-4 0 1 0 (b)-50 0-1 10

6 Blue 2 (a) 1 10 ~ 20, () 1 5 0 2 0

7 Black (a) — 5-5, (b) — 5-5 Also, with the three primary colors and the ink color, some of the green, orange, and violet colors may not be able to be expressed sufficiently. If it is necessary to express, in addition to the three primary and black dyes, orange (VI above) and violet (above) It is desirable to additionally use at least one dye selected from IX) and green (X above), particularly a dye having the following a value and b value.

Orange (a) 40-60, (b) 50 80

Biorelet (a) 25 to 50, (b) 45 to --20

Green (a) — 70 to 140, (b 50 to 80) Depending on the printing quality, it is also possible to use a combination of three primary colors and black light-colored ink.

As the dye, a reactive dye, an acid dye, a direct dye, a disperse dye, a cationic dye, a fluorescent dye, or the like is used depending on the type of the fiber of the fabric to be dyed, but the dyeing solution has a surface tension of 30 to 65 dainno. The viscosity in cm (especially 40 to 50 dynes / cm) and the viscosity in 25 should be adjusted to 4 cp _S or less (especially 1 to 2 cps).

As the three primary colors and the black dye, it is preferable to use the following ones since a reliable color fastness can be obtained after dyeing. The number indicates the CI number.

(1) Direct dye

Yellow 2 8 3 0, 1 0 6

Red 7 98 0, 83, 92

Bull 1 7 1 7 8, 8 6 1 0 6, 1 8 9, 1 9 9, 2 0 7, 2 1

8

Black 6 2 1 1 3

(2) Acid dye

Yellow 1 17, 19, 25, 38, 42, 49, 61, 72, 1 16,

1 2 7, 1 4 1, 1 6 1, 2 0 7

Red 19, 28, 35, 37, 51, 57, 62, 95, 1 11,

1 1 4, 1 18, 1 3 1, 1 3 4, 1 3 8, 1 4 5, 1 4 9, 15 8, 24 9, 25 4, 26 6, 27 4, 31 5, 36 6 Bull 4 0, 49, 62, 78, 90, 92, 1 1 2 , 1 1 3, 1 2

6, 1 2 7, 1 2 9, 1 3 3, 1 3 8, 1 4 0, 1 8 2, 2 9 9, 3 0 0

Black 24,26,107,109,112,155,2334

(3) Reactive dye

Yellow 2, 81, 95, 1 16, 14 16 16 1, orange 12 Red 4, 24, 45, 108, 2 18

Pull one 2, 5, 15, 15, 19, 41, 4972, 75, 90 Black 1, 8

(4) Disperse dye

Yellow 7 9, 1 6 0

Red 50, 72, 127, 144, 54

Bull 1 7 3, 1 4 2, 1 9 8, 2 2 4

Black Further, in the present invention, the dye is attached to the fabric as a very small dot, so that the dye is made of an inorganic salt, a dispersant, a dissolving agent, etc. It is preferable to use it after removing it. For example, a water solution in which the content of sodium, potassium, phosphorus and copper is adjusted to 0.01% or less, and the content of anionic surfactant and nonionic surfactant is adjusted to 0.015% or less, respectively. Sex dyes should be used. In particular, when the monovalent and divalent metals are adjusted to 10 ppm or less, it is preferable to use a water-soluble dye having a solubility in water at 20 ° C. of 50 g 1 or less.

Examples of this type of water-soluble dye include the following. The number indicates the CI number. (1) Direct dye

Yellow 2 8, 1 0 6

Red 8 0, 8 3, 8 9

Blue 80, 106, 189, 199, 209

(2) Acid dye

1 yellow 7, 38, 49, 72, 79, 141, 169, 219,

2 46-Red 52, 1 114, 1 38, 24 9, 25 54, 26 0, 27 4,

3 6 1

Blue 7, 9, 62, 90, 112, 113, 185, 225 Black 26, 52, 109, 110

(3) Reactive dye

Yellow 13, 14, 75, 76, 77, 79 ', 1 15

Red 2 2, 2 3, 1 08, 1 0 9, 1 1 0, 1 1 1, 1 1 2,

1 1 3, 1 1 4

BULL 14, 19, 21, 27, 28, 100, 101, 148 Black 1, 5, 8 In the present invention, the medium for dissolving or dispersing the above dye is as follows. A medium used in conventional general printing and a medium used in a conventional ink jet method can be used, and examples thereof include water or a mixture of water and an organic solvent, but water is generally used. It is desirable to add various dispersants, pH adjusters, conductivity adjusters, and the like to the dye ink as needed.

Additives include ethylene glycol, diethylene glycol, triethylene glycol, thiodiethylene glycol, dimethylene glycol dimethyl ether, triethylene glycol dimethyl ether, Glycols such as polyethylene glycol dimethyl ether and urea

It is preferably used at a rate of 100 to 300 g / 1.

The cloth supply section (4) is a section for sending the cloth (1) toward the printing section (3). As long as the cloth can be supplied at a constant speed, known means can be used without any particular limitation. One example is a cloth holding roller (7) that rotates intermittently by a low-speed rotating motor and a centrifugal clutch. )), The roll-shaped cloth (1) wound around is sent out as an expanded cloth (1).

The cloth (1) sent out from the cloth supply section (4) is conveyed to the printing section (3) by a belt conveyor or the like, and after being supplied with the dye ink as described above, is conveyed further downstream. Is done.

The drying section (5) is a section for adjusting the water content of the cloth (1) passed through the printing section (3). By providing the drying section (3) before the heating section (6), problems such as bleeding are improved, and a clear ink jet printed fabric can be obtained. The drying section (5) is a section for improving the color development of the printed fabric by adjusting the water content of the cloth to 3 to 30% by mass. The form of (5) is not particularly limited, and a known drying means can be appropriately used. It is also possible to adjust the moisture in the fabric to the above numerical range by natural drying by setting the transport time between the printing section (3) and the heating section (6) longer than usual, but It is more preferable to provide a drying means such as hot air heating because it is easy to keep the drying state constant. Preferred drying means that can be used as the drying section (5) of the present invention include, for example, hot air dryers, cylinder dryers, microwave dryers, far infrared dryers, vacuum dryers, baking machines, and the like. Examples include, but are not limited to, equipment such as Tenichi, Shrink Dryer, Hot Full, Roller Dryer, etc.

The heating section (6) is a section where the cloth (1) is subjected to wet heat treatment or dry heat treatment. You. The heating section (6) is a section for performing a process for fixing the dye molecules to the fibers. The heating section (6) preferably has a closed space in the housing, and is preferably provided with a heating medium for heating the closed space. Since the processing conditions differ depending on the cloth to be processed, it is desirable that the processing conditions of the heating medium can be easily changed. Therefore, such a form is desirable.

In addition, it is necessary to provide a transport means for transporting the fibers in the housing. Depending on the material, a long stay is required. Therefore, it is desirable to provide a guide roller so that the fabric can meander, thereby saving space and energy. It is desirable that the arrangement of the guide rollers is such that the transport path can be easily changed, and the residence time of the fabric in the heating section (6) can be easily changed. This is because it is desirable to be able to cope with various kinds of fabrics.

As a heating means, a heating means used in a usual printing apparatus such as a wet heat treatment apparatus, a dry heat treatment apparatus, and a high temperature and high pressure treatment apparatus is used. When the entire apparatus is used as an apparatus for processing only a specific cloth, an apparatus capable of performing processing corresponding to the cloth to be used may be provided, and processing of various kinds of cloth is performed with only a single apparatus. In such a case, wet heat treatment, dry heat treatment, and high-temperature / high-pressure treatment can be installed simultaneously in a single housing so that the necessary treatment can be performed by switching, or multiple necessary means can be installed in parallel. By switching the heating means used for each lot, it is possible to cope with various kinds of cloths.

The heating conditions are as follows: When the material of the cloth (1) is 100% cotton, the above-mentioned closed space has a humidity of 80 to 95% RH, a temperature of 100 to 110 ° C, and a cloth (1). When the material of 1) is 100% polyester, good color development can be obtained when the humidity is 60 to 85% RH and the temperature is 175 to 190 ° C. Subsequent to the heating section (6), the cloth collecting means of (8) is provided. In this way, the fabric that has been subjected to the printing process is collected, and the next step is performed. Such a cloth collecting means may be, for example, winding on a roller, shaking off, or the like, but is not particularly limited as long as the desired collection can be performed in the next step.

Next, the invention relating to the textile printing method of the present invention will be described.

The printing method of the present invention includes a step of printing by first attaching a dye ink discharged from an ink jet nozzle to a fabric. The desired pattern is applied to the fabric by such a process.

Next, the fabric is dried. The drying method is not particularly limited, and the above-mentioned general drying method is used. It is desirable that the moisture content of the fabric be 3 to 30% by the drying step. If the moisture content is less than 3%, the obtained product will have a print-like appearance with the ink dots visible, and the dye will not penetrate into the fiber, so the adhesion will be poor and the concentration will not appear. When the content exceeds 30%, bleeding occurs, and the dye ink penetrates completely to the back, so that the density is not high.

Thereafter, the dye is fixed by continuous heat treatment without going through the steps of winding and shaking off. The conditions of the heat treatment are as described above.

After such heat treatment, washing and drying are performed. The washing and drying steps are performed by once collecting the cloth by means such as winding and shaking off, and then passing through ordinary washing and drying steps. Industrial applicability

As described above, according to the ink jet printing apparatus and the ink jet printing method of the present invention, the problem of variation in print quality in one lot of fabric and variation in print quality with other lots. As a result, it is possible to supply high-quality, uniform inkjet printed products stably. You. In addition, since the heating unit is located close to the printing unit and the drying unit, the manufacturing process and transportation time are reduced, and it is not necessary to provide a storage location for rolls that have been wound up once or a separate wet heat treatment unit. This has the effect of making it possible to produce printed textiles quickly and at low cost.

Claims

The scope of the claims

1. A printing unit having an ink jet nozzle for discharging dye ink onto the fabric, a fabric supply unit for supplying the fabric to the printing unit side, a drying unit for drying the fabric printed in the printing unit, and a drying unit for drying the fabric. An ink jet printing apparatus comprising a heating section for heat-treating a fabric provided downstream of the apparatus.

2. The heating section comprises a housing having a cloth introduction port and a cloth discharge port, and a guide roller disposed inside the housing, wherein the cloth bends inside the housing. 2. The ink jet printing apparatus according to claim 1, wherein a plurality of guide rollers are provided so as to be able to travel.

3. The process of printing the dye ink discharged from the inkjet nozzle onto the fabric

The process of drying the printed fabric

After the drying step, the ink jet printing method for a fabric comprises a step of continuously performing a heat treatment without collecting the fabric.

4. The process of printing the dye ink discharged from the ink jet nozzle on the fabric

The process of drying the printed fabric

An ink jet printed fabric manufactured by a process of performing a heat treatment continuously without winding up the fabric after the drying process.