JP2006207101A5 - - Google Patents

Description

Dry transfer printing of natural fiber materials with reactive dyes

The present invention relates to a transfer paper for dry transfer printing and a dry transfer printing method using the same. Hereinafter, in the present invention, terms relating to transfer paper may be used as follows.
(1) Transfer base paper: Paper or film with release agent applied (2) Transfer paper: Transfer base paper coated with ink receiving layer (3) Transfer paper: Print or give water-soluble dye ink Transfer paper

Conventionally, screen printing, roller printing, rotary screen printing, gravure printing, or transfer printing methods using these printing techniques have been known and practiced industrially as methods for drawing a pattern firmly and finely on a fabric with dyes. ing. These plate-making printing methods have restrictions on the number of colors, and printing with a three-primary-color separation mold can express a multi-color feeling, but it is difficult to adjust the hue and density of the dye used for the three-primary-color composition. There is a problem that there is a great risk of lack of reproducibility of print processing.

In addition, engraving costs are high in small-lot production, and it has been pointed out that problems such as an increase in material losses such as preparation of surplus color paste in addition to the required processing amount during printing are pointed out.
As a new textile printing method that solves these problems, non-prepress printing that performs image processing with a computer and prints using an ink-jet method is in the spotlight, and in addition to direct printing on fabrics, progress in the field of transfer printing is also accelerated. ing. In particular, in the case of ink-jet printing, when a small amount of dye solution is printed on a transfer paper, problems such as lack of leveling due to dot spots and loss of fineness due to dye solution oozing out have been pointed out.

As a method for solving these problems, a water-soluble varnish as a release agent or a release agent-coated paper using a solvent-type varnish is used as a release agent on a transfer base paper, and a water-soluble paste is applied on the paper. A method has been proposed in which a dye solution is uniformly held in a paste layer by printing. These methods include dry transfer printing of polyester fibers using disperse dyes that sublimate with heat, or transfer dyes to cellulosic fibers or protein fibers that are moistened with water and pressurized and pressed together with transfer paper. Although effective for wet transfer, the wet transfer method is prone to the problem of lack of pattern delicacy, and when this type of transfer paper is dry-transferred to a cellulose or protein system, printing of the dye on the transfer paper is possible. Was good, but it was not possible to transfer the dye from the transfer paper to the fabric.

In Patent Document 1, a transfer paper composed of four layers of a release agent layer, a thermoplastic resin layer, a water-soluble polymer material layer, and an ink layer is superimposed on a cloth, and an ink layer and a water-soluble polymer material layer are formed by pressing and heating. Further, it is described that a thermoplastic resin layer is transferred to a fabric and fixed. However, it is described that the thermoplastic resin layer described in Patent Document 1 is separated as a film in the water washing step (page 19-23 of the same Patent Document 2), so-called hydrophobic resin is used. Has been. Therefore, the compatibility with the water-soluble dye is poor, and it is not suitable for the dry transfer printing method using the water-based ink which is the subject of the present invention. Further, the hydrophobic resin is difficult to remove by washing with water, and there is a problem that the texture of the fabric is impaired.

Patent Document 2 discloses a transfer paper having a release layer on one side surface and further having a coating layer composed of a paste and an adhesive on the outer layer thereof, wherein the coating layer and the fabric of the transfer paper are provided. In addition, there is described a transfer paper in which the transfer rate of the adhesive and the adhesive to the fabric is 98 to 100% when both are pressed at 1 to 4 kg / cm ² . The patent document is characterized in that the transfer of the glue and the adhesive to the fabric is performed only by pressure-bonding without heating. However, such a coating layer is a processing method having very little practical value.

In other words, transfer paper coated with glue and ink-jet printed transfer paper usually have to be stored for a certain period of time before being wound up and transferred to the transfer process, but about 1 to 4 kg / cm ² If the ink receiving layer is peeled off by pressing, the transfer paper / transfer paper applied or printed several hundred meters will be transferred to the back side of the paper, and the transfer paper / transfer paper will be wound up. Virtually impossible.
Japanese Patent Publication No.43-14865 JP-A-6-270596

As a result of intensive research on the printing method on the fabric and the dry transfer method in the inkjet printing method, the present inventors have found that the ink receiving layer 1 is formed on a release agent-coated paper using a known organic solvent type varnish. After coating and drying hydrophilic synthetic resins that can be softened or melted by heat and easily peeled off from the release agent layer, the ink-receiving layer 2 is further adhered to the hydrophilic synthetic resin. By forming a two-layer ink-receiving layer that is well-absorbed and held in the dye solution to be printed, and coated with a water-soluble glue that improves leveling and eliminates dot spots when transferred to a fabric. It has become possible to obtain dry transfer paper with level transfer and good transferability, and it has been found that a dry transfer printing method using reactive dyes of natural fiber materials of cellulosic fibers or protein fibers can be constructed, and is expected to be put to practical use. Get It is obtained by completing the present invention.

The advantage of the present invention is that it can be applied to dry transfer of cellulosic fibers or protein fibers using polyester fiber dry transfer equipment, which is widely used at present, and has excellent printing such as texture and fineness. An object of the present invention is to provide a transfer paper capable of providing performance and a printing method using the transfer paper.

In the present invention, when dry transfer printing a fabric made of a natural fiber material using a reactive dye, first, a release agent made of an organic solvent-soluble synthetic resin is coated on the paper and dried, and then a hydrophilic agent is formed thereon. Apply and dry a reactive resin, and then apply and dry a hydrophilic glue on it, then print and dry the reactive dye water-based ink by inkjet printing on the transfer paper. Dry transfer of natural fiber material with reactive dye, which is prepared and transferred and transferred to the surface of the natural fiber material by transferring and transferring the transfer paper by close contact and heating It is a textile printing method (Section 1).

Next, the present invention relates to a dry transfer printing method of natural fiber material with a reactive dye according to item 1, wherein the transfer paper is transferred to a natural fiber material pretreated with an alkali agent in close contact and heated (transferred). Item 2).

In the present invention, the release agent layer is selected from organic resin-soluble synthetic resins such as silicon resin, fluororesin, polypropylene resin, polyethylene resin, acrylic resin, alkyd resin, polyamide resin, phenol resin, and stearic acid resin. Item 3. A dry transfer printing method for a natural fiber material using the reactive dye according to any one of Items 1 to 2 (Item 3).

Further, in the present invention, the hydrophilic resin layer is selected from hydrophilic synthetic resins that are softened or melted by heating, such as water-soluble polyester resins, water-soluble urethane resins, water-soluble urethane-modified ether resins, and water-soluble polyethylene oxide resins. Item 4. A dry transfer printing method of a natural fiber material using a reactive dye according to any one of Items 1 to 3 (Item 4).

Furthermore, in the present invention, the hydrophilic paste layer is composed of seaweed (sodium alginate), fibrin-derived paste (carboxymethyl cellulose, hydroxyethyl cellulose, etc.), modified starch paste (etherified starch, esterified starch), water-soluble synthesis. Any one of Items 1 to 4, which is selected from hydrophilic thickening substances such as polymers (polysodium acrylate, polyvinyl alcohol, etc.), natural gums (etherified tamarind gum, etherified guar gum, etc.) A dry transfer printing method for natural fiber materials with the reactive dye described in (5).

In the present invention, a fabric made of a natural fiber material is coated and dried with urea or a hydrophilic thickener as a migration inhibitor for the purpose of preventing yellowing during transfer, improving transferability, and improving dyeing. Item 6. A dry transfer printing method for a natural fiber material using the reactive dye according to any one of Items 1 to 5 (Item 6).

In the present invention, the natural fiber material is a cellulosic fiber material such as cotton, hemp, lyocell, rayon (polynosic rayon, viscose rayon, cupra rayon, acetate, etc.), or silk, wool, animal hair, etc. Item 10. A dry transfer printing method of natural fiber material with reactive dye according to any one of Items 1 to 6, wherein the fiber material is selected from woven fabrics, knitted fabrics, nonwoven fabrics, etc. 7).

Next, according to the present invention, a transfer paper is prepared by printing and drying an aqueous ink of a reactive dye on a transfer paper by an ink jet printing method, and transferring the transfer paper by adhering to the natural fiber material and heat treatment. The transfer paper used in the dry transfer textile printing method to be subsequently fixed, wherein the transfer paper is first coated and dried with a release agent made of an organic solvent-soluble synthetic resin on the paper, and then hydrophilic. It is a transfer paper for dry transfer textile printing (Item 8), which has a three-layer structure prepared by applying and drying a functional resin and further applying and drying a hydrophilic paste thereon.

In the present invention, the release agent layer made of an organic solvent-soluble synthetic resin is an organic material such as silicon resin, fluorine resin, polypropylene resin, polyethylene resin, acrylic resin, alkyd resin, polyamide resin, phenol resin, and stearic acid resin. 9. The transfer paper for dry transfer printing according to claim 8, wherein the transfer paper is selected from solvent-soluble synthetic resins (claim 9).

Further, in the present invention, the hydrophilic resin layer is selected from hydrophilic synthetic resins that are softened or melted by heating, such as water-soluble polyester resins, water-soluble urethane resins, water-soluble urethane-modified ether resins, and water-soluble polyethylene oxide resins. Item 10. The transfer paper for dry transfer printing (Item 10) according to any one of Items 8 to 9, characterized in that.

Furthermore, in the present invention, the hydrophilic paste layer is composed of seaweed (sodium alginate), fibrin-derived paste (carboxymethyl cellulose, hydroxyethyl cellulose, etc.), modified starch paste (etherified starch, esterified starch), water-soluble synthesis. Any one of Items 8 to 10, which is selected from hydrophilic thickening substances such as polymers (polysodium acrylate, polyvinyl alcohol, etc.), natural gums (etherified tamarind gum, etherified guar gum, etc.) The transfer paper for dry transfer printing described in (11).

The present invention relates to a dry transfer printing method for cellulosic fiber or protein fiber material that provides a reproducible representation of delicate printing patterns, which has been considered difficult in the past, and is often used for dry transfer printing of polyester fibers. The heat transfer equipment can be applied as it is, and its practical value is extremely large.

In particular, the method of the present invention can construct a production system that can respond quickly and efficiently to small-lot, high-mix production and diversity needs, and is excellent in terms of environmental compatibility, economy, and quality effects. This is a new method that greatly contributes to value enhancement.

In order to achieve the object of the present invention, the present invention is configured under the following conditions. That is, the ink receiving layer applied on the release agent layer is composed of two layers, and the lower ink receiving layer 1 can be softened and melted by heating and pressurization and easily peeled off from the release agent layer and transferred to the fabric. A hydrophilic synthetic resin is used. The physical properties of this hydrophilic resin must satisfy the following conditions.

1. It must be able to adhere evenly after applying a solvent-type mold release agent, that is, it has no water repellency during coating.
2. The adhesive strength of the coating film is strong, and no cracking or peeling phenomenon occurs.
3. Good compatibility with dyes and does not inhibit dyeing.
4). It is easy to dry after application and does not cause tackiness or contamination of the printed dye.

5. Good transferability to fabric by heating and pressing.
6). It is easy to wash after dye fixing treatment, and can be easily washed and removed so as not to disturb the texture of the fiber.
7). Good compatibility with the surface tension reducing agent added to enhance the uniform adhesion to the release agent layer as required (water repellency, drying property, viscosity stability, etc.).
If the synthetic resin satisfies these conditions, the object of the present invention can be achieved.
In addition, since the effect of the surface tension reducing drug differs depending on the type and amount of the drug and the type of the water-soluble synthetic resin, it is necessary to confirm the combination in advance.

Next, a hydrophilic paste is applied and dried as the ink receiving layer 2 applied on the hydrophilic synthetic resin layer. The following matters are imposed as physical properties of the hydrophilic paste.
1. It must be swollen with water and evenly applied to the hydrophilic synthetic resin layer and has good adhesion.
2. Good compatibility with dyes and does not hinder dyeing after transfer.
3. The dry film is flexible and should not crack or peel off during dynamic handling.

4). In ink jet printing of dye liquid, it can be quickly absorbed and held uniformly in the glue layer, and it can be dried quickly without causing contact contamination due to dye rubbing.
5. It must be peeled off from the release agent layer together with the water-soluble synthetic resin by heating / pressurizing treatment and easily transferred to the fabric.
6). It can be easily removed by washing after dye fixing treatment.

The feature of the present invention is that the ink receiving layer provided on the release agent layer is composed of two layers, and the lower layer is dried by applying a hydrophilic synthetic resin that is softened or melted by heat, Next, a transfer paper having a so-called two-layer structure is prepared by applying and drying a hydrophilic glue on the upper layer, and a water-based ink of a reactive dye is printed and dried on the transfer paper by an inkjet printing method. And transfer printing using the transfer paper to a woven or knitted fabric, non-woven fabric, paper or the like.

In this case, a coating method in which a large amount of hydrophilic paste is in direct contact with the release agent layer, for example, a water-soluble (hydrophilic) synthetic resin and a large amount of water-soluble (hydrophilic) paste are mixed. In such a condition, the peeling ability of the water-soluble (hydrophilic) synthetic resin due to heating and pressurization is greatly reduced, resulting in lack of transferability of dye to the fabric and reproducibility of transfer.

The transfer base paper used in the present invention is a known transfer paper or film, pulp paper made from pulp or recycled paper such as kraft pulp or grind pulp, recycled paper or heat-resistant synthetic resin film, For example, a polyester film or the like is used. In view of workability, the weight is preferably 10 to 150 g / m 2 and the thickness is preferably 0.01 to 0.5 mm.

An organic solvent soluble silicon resin, fluorine resin, polypropylene resin, polyethylene resin, acrylic resin, alkyd resin, polyamide resin, phenol resin, stearic acid resin or the like is used as an organic solvent such as ethyl acetate, toluene, xylene, Dissolve in methanol, ethanol, propyl alcohol or the like and apply as an organic solvent varnish to form a release agent layer. The thickness of the release agent layer is preferably about 10 to 30 μm.

On this release agent layer, an ink receiving layer composed of two layers comprising ink receiving layers 1 and 2 is applied. The first layer is a water-soluble or synthetic resin that is softened and melted by heat. A hydrophilic polyester resin, polyurethane resin, polyurethane-modified ether resin, polyethylene oxide resin or the like is applied to a thickness of about 10 to 60 μm and dried.

The thickness of the hydrophilic synthetic resin film is related to the degree of difficulty when the resin is softened and melted and transferred to the fabric, and the washing and removal properties after the dye fixing process. is important. Further, depending on the type of the hydrophilic synthetic resin, a water repelling phenomenon may occur at the time of application, and uniform adhesion with the release agent layer may be difficult. In this case, the coating properties can be improved by mixing a small amount of nonionic, anionic surfactant and alcohol as a surface tension reducing agent for the synthetic resin layer.

Next, as the hydrophilic paste (ink receiving layer 2) applied on the ink receiving layer 1, a hydrophilic thickening substance that does not inhibit the dyeing of the reactive dye to the fiber can be applied. (Sodium alginate), fibrin-derived paste (carboxymethylcellulose, hydroxyethylcellulose, etc.), processed starch paste (etherified starch, esterified starch), hydrophilic synthetic polymers (polyacrylic acid soda, polyvinyl alcohol, etc.), natural Good adhesion to hydrophilic synthetic resin layers such as gums (etherified tamarind gum, etherified guar gum, etc.), and the printed dye solution can be uniformly held and dried in the glue layer, and water-soluble by heating and pressing Selected from those which can be easily transferred to the fabric together with the synthetic resin and do not inhibit dyeing during the dye fixing treatment. These hydrophilic sizing agents are adjusted to an amount capable of uniformly adhering / absorbing and retaining the dye, but approximately 5 to 30 μm is used as a reference.

On the transfer paper obtained in this way, that is, the transfer paper composed of the base paper for transfer, the release agent, the ink receiving layer 1 and the ink receiving layer 2, an aqueous ink of a reactive dye is printed by an ink jet printing method. Dry to make transfer paper. Next, the transfer paper and the target fabric are combined, and the ink receiving layers 1 and 2 and the dye layer are moved to 90% or more by pressing and heating, and then the dye is fixed to the fabric by dye fixing treatment. Then, the hydrophilic synthetic resin and hydrophilic glue used as the ink receiving layer are removed by washing (washing, soaping, washing) to obtain a printed fabric or printed product having a good fiber texture. .

In the present invention, the fabric refers to a cellulosic fiber material such as cotton, hemp, lyocell, rayon (polynosic rayon, viscose rayon, cupra rayon, acetate, etc.), or a fabric of protein fiber material such as silk or wool. , Knitted fabric, non-woven fabric and the like alone, blended fabric, or woven fabric. Further, a composite fiber of these and a synthetic fiber may be used. In this case, if necessary, the fabric is pre-treated with a chemical necessary for dyeing or a drug effective for promoting dyeing, and then used for transfer.

When printing with reactive dyes, when adopting the one-phase method, 1-7% sodium carbonate, potassium carbonate, sodium bicarbonate, sodium trichloroacetate, etc. as alkaline agents on the fabric, yellowing prevention during transfer, transferability For the purpose of improvement, dyeing improvement, etc., a mixed solution of 3 to 15% of urea and 0.05 to 1% of a hydrophilic thickening substance such as sodium alginate as a migration inhibitor is pad-dried. Further, a mixed solution of acid-resistant natural gums 0.05 to 0.5% as a migration inhibitor is pad-dried.

For fixing the dye to the fiber after the transfer, the fixing conditions employed in the normal direct printing method can be used as they are. For example, in the one-phase steam fixing method for reactive dyes, a steaming treatment at 100 to 105 ° C. for 8 minutes is used. 90-95 ° C, 7-15 seconds of immersion treatment, or 35-43 Baume sodium silicate solution as a two-phase cold-fix method, pad and squeeze (pickup 100-150%), then 20-35 ° C, 8- Batch up for 12 hours. After the dye fixing treatment, the synthetic resin and paste used for the ink receiving layer are removed by a conventional washing condition (water washing, soaping, water washing) to obtain a printed matter having a good fiber texture.

In the present invention, the dye solution used for inkjet printing includes dyes and dye solubilizers such as water, thiodiglycol, polyethylene glycol, glycerin, ethylene glycol and the like, as necessary, anti-drying agents, surface tension adjusting agents, What added a viscosity modifier, PH regulator, an antifungal agent, a sequestering agent, etc. is used.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not restrict | limited to these Examples. In the examples,% means% by weight.

Example 1
Organic solvent varnish (phenolic resin 30%, ethylcellulose 3%, calcium carbonate 10%, clay 10%, ethyl acetate 47%) as a release agent layer on pulp paper for transfer (weight 90g / m2, thickness 0.2mm) After applying and drying by a coating machine, curing was performed at 140 ° C. for 3 minutes. The thickness of the release agent layer was 30 μm.

Next, as the ink receiving layer 1, 75% of plus coat RZ-142 (water-soluble polyester resin 25% dispersion: manufactured by Kyoyo Chemical Industry Co., Ltd.) and plus coat FR-550 (20% of water-soluble polyester resin, wax-containing dispersion: 25%, a total of 100% solution was applied and dried with a coating machine. The thickness of the coating layer was 60 μm.

Next, a 2% solution of Eco-Algin MS (sodium alginate glue: manufactured by Adachi Tomehime Co., Ltd.) was applied and dried as an ink receiving layer 2 with a coating machine. The thickness of this coating layer was 25 μm. In this way, a dry transfer paper for water-soluble dyes was obtained.

Next, a reactive dye ink solution (CI Reactive Red 226 15%, polyethylene glycol MW200 20%, water 65%) is applied onto the above transfer paper by an ink jet printer (Novajet II: manufactured by Encad: on-demand thermal printer). Was printed and dried.

Separately, a mixed aqueous solution of 3% soda ash, 10% urea, and 0.1% ecoargin MS was padded on a cotton broad cloth (75% pickup) and dried to obtain a cotton pretreated cloth.

Next, the reactive dye dry transfer paper and the alkali pretreated cotton broad cloth were combined, and the design was transferred to the cotton broad cloth by heating and pressing (150 ° C., 30 seconds, 0.2 kg / cm 2). The transfer rate of the dye from the transfer paper to the cotton broad cloth was about 90%.

Next, the cotton broad cloth was subjected to HT steam treatment at 105 ° C. for 8 minutes, washed and dried. The printed fabric obtained in this way was a printed fabric that had a delicate design and was dyed vividly and firmly, and showed a soft texture.

Comparative data: As the knowledge obtained under various conditions in the process leading to the present invention, the following table shows the test results showing the superiority or inferiority of level printing and transfer to cotton fabric when dye ink is printed on transfer paper. 1 and Table 2 show. That is, Tables 1 and 2 show how the effect varies depending on the treatment process of Example 1 when a water-soluble varnish is used as the release agent layer or the difference in the constituent conditions of the ink receiving layer. It is data indicating that.

[Table 1]
A. Leveling and water repellency during dye ink printing

註） ○＝良好 △＝やや劣る ×＝劣る [Table 2]
B. Transferability to fabric

＝) ○ = Good △ = Slightly inferior × = Inferior

In order to achieve the purpose of fine transfer printing, B. Although it is necessary to satisfy both physical properties, only the combination of (6) and (12), which is the method of the present invention, satisfies both necessary conditions, as is apparent from the above test results.

Example 2
After processing the organic solvent varnish used in Example 1 as a release agent layer on pulp paper for transfer (weight 90 g / m 2, thickness 0.2 mm), HA resin PE-1B (water-soluble urethane) is used as the ink receiving layer 1. Modified liquid of 25% modified ether type resin: manufactured by Meisei Chemical Co., Ltd.) 60%, plus coat RY-2 (surface tension reducing agent: manufactured by Kyoyo Chemical Co., Ltd.) 2%, water 38% Applied and dried. The thickness of the coating layer was 35 μm.

Next, 3% of sorbitolase C-5 (etherified starch paste: manufactured by AVEBE) was applied and dried as an ink receiving layer 2 with a coating machine. The thickness of the coating layer was 25 μm. In this way, a dry transfer paper for water-soluble dyes was obtained.

Next, reactive dye ink (CI Reactive Blue 15 15%, thiodiglycol 15%, water 70%) was applied onto the transfer paper with an ink jet printer (Novajet II: Encad, on-demand thermal printer). A dry transfer paper of reactive dye was obtained by printing and drying.

Separately, a mixed aqueous solution of 4% sodium bicarbonate, 15% urea, Eco-Algin MS (sodium alginate: manufactured by Adachi Tomehime Co., Ltd.) 0.1% is padded on a viscose rayon cloth (85% pickup), dried, and pretreated with rayon Got.

Next, the reactive dye dry transfer paper and the pretreated cloth were combined, and the dye was transferred onto the rayon cloth by heating and pressing (150 ° C., 30 seconds, 0.2 kg / cm 2). The transfer rate of the dye from the transfer paper to the viscose rayon cloth was 90% as in Example 1. Next, this viscose rayon cloth was subjected to HT steam treatment at 105 ° C. for 8 minutes, washed and dried. The printed matter thus obtained had a delicate design as in Example 1, the texture of the fiber was flexible, and various fastnesses were sufficient.
Example 3

The ink receiving layer 2 in Example 1 was changed to MC polymer P-40 (polyvinyl alcohol / polyacrylic acid soda mixed paste product: manufactured by Murayama Chemical Laboratory), and other conditions were processed in the same manner as in Example 1. In this case, a fine printed matter excellent in uniform adhesion during dye printing and transferability to cotton was obtained.

Claims (11)

In dry transfer printing of fabric made of natural fiber material using reactive dye, first apply a release agent made of synthetic resin soluble in organic solvent on paper, then apply hydrophilic resin on it.・ Dry, and then apply and dry a hydrophilic glue on top of the three-layered transfer paper, and print and dry the reactive dye water-based ink using the inkjet printing method to create the transfer paper. A dry transfer printing method of natural fiber material with a reactive dye, wherein the pattern on the transfer paper is transferred and transferred to the surface of the natural fiber material by transferring the transfer paper by close contact and heating, followed by fixing treatment. 2. The dry transfer printing method for natural fiber material using reactive dye according to claim 1, wherein the transfer paper is transferred to a natural fiber material pretreated with an alkali agent in close contact and heating. The release agent layer is selected from organic resin-soluble synthetic resins such as silicon resin, fluorine resin, polypropylene resin, polyethylene resin, acrylic resin, alkyd resin, polyamide resin, phenol resin, stearic acid resin, etc. A dry transfer printing method of a natural fiber material with the reactive dye according to claim 1. The hydrophilic resin layer is selected from hydrophilic synthetic resins that are softened or melted by heating, such as water-soluble polyester resins, water-soluble urethane resins, water-soluble urethane-modified ether resins, and water-soluble polyethylene oxide resins. A dry transfer printing method of a natural fiber material with the reactive dye according to any one of claims 1 to 3. The hydrophilic glue layer is composed of seaweed (sodium alginate), fiber-derived glue (carboxymethylcellulose, hydroxyethylcellulose, etc.), modified starch paste (etherified starch, esterified starch), water-soluble synthetic polymer (polyacrylic soda) The reactive dye according to any one of claims 1 to 4, wherein the reactive dye is selected from hydrophilic thickening substances such as natural gums (etherified tamarind gum, etherified guar gum, etc.) A dry transfer printing method for natural fiber materials. It is characterized by applying and drying either a urea or a hydrophilic thickening substance as a migration inhibitor to fabric made of natural fiber material for the purpose of preventing yellowing during transfer, improving transferability, and improving dyeing. A dry transfer printing method of a natural fiber material with the reactive dye according to any one of claims 1 to 5. Natural fiber materials are cellulosic fiber materials such as cotton, hemp, lyocell, rayon (polynosic rayon, viscose rayon, cupra rayon, acetate, etc.), and fabrics of protein fiber materials such as silk, wool, animal hair, The dry transfer printing method for natural fiber materials using reactive dyes according to any one of claims 1 to 6, characterized in that they are selected from knitted fabrics, non-woven fabrics and the like alone, blended fabrics, or woven fabrics. Dry transfer is performed by printing and drying reactive dye water-based ink on transfer paper by ink-jet printing, transferring the transfer paper to a natural fiber material by close contact and heat treatment, and then fixing the transfer paper. A transfer paper used in a textile printing method, in which the transfer paper is first coated and dried with a release agent made of a synthetic resin soluble in organic solvent, and then coated with a hydrophilic resin and dried. Further, a transfer paper for dry transfer printing, characterized in that it has a three-layer structure prepared by applying and drying a hydrophilic paste on it. Release agent layer made of organic solvent soluble synthetic resin is organic resin soluble synthetic resin such as silicon resin, fluorine resin, polypropylene resin, polyethylene resin, acrylic resin, alkyd resin, polyamide resin, phenol resin, stearic acid resin The transfer paper for dry transfer printing according to claim 8, wherein the transfer paper is selected from the following. The hydrophilic resin layer is selected from hydrophilic synthetic resins that are softened or melted by heating, such as water-soluble polyester resins, water-soluble urethane resins, water-soluble urethane-modified ether resins, and water-soluble polyethylene oxide resins. The transfer paper for dry transfer printing according to any one of claims 8 to 9. The hydrophilic glue layer is composed of seaweed (sodium alginate), fiber-derived glue (carboxymethylcellulose, hydroxyethylcellulose, etc.), modified starch paste (etherified starch, esterified starch), water-soluble synthetic polymer (polyacrylic soda) The dry transfer according to any one of claims 8 to 10, which is selected from hydrophilic thickening substances such as natural gums (etherified tamarind gum, etherified guar gum, etc.). Transfer paper for textile printing.