JP2019052399A - Printing method - Google Patents

Abstract

To provide a printing method capable of suppressing generation of printing unevenness or reduction of printing color concentration to a material to be printed such as a fiber material or a leather material, especially a material to be printed of relatively thick base material or of base material with relatively long pile such as shearing base or pile base, and excellent in productivity.SOLUTION: There is provided a printing method of a material to be printed having a process for printing an image on a printing paper having a coated layer containing at least an inorganic pigment, a water-soluble synthetic resin and a natural resin on a paper supporter with an ink having a heat diffusing dye and/or heat sublimable dye to obtain a printing paper, a process for adhering the material to be printed and the printing paper after adding moisture to the material to be printed, heating and crimping the same, and transferring the dye from the printing paper to the material to be printed, a process for removing the printing paper from the material to be printed, and a process for conducting fixing treatment of the dye transferred to the material to be printed in this order.SELECTED DRAWING: None

Description

  The present invention relates to a printing method for a material to be printed. More specifically, the present invention relates to a method for printing a material to be printed by transferring the dye from a printing paper on which an image has been printed with an ink having a heat diffusible dye and / or a heat sublimation dye to the material to be printed.

  A textile printing method is known in which a transfer paper on which an image is formed is heated and pressure-bonded to a fabric or the like, and a dye that forms the image is transferred to the fabric or the like (see, for example, Patent Documents 1 to 3).

  Thermal diffusion dyes and / or thermal sublimation dyes include acid dyes used for polyamide fibers such as silk and nylon; disperse dyes used for polyester fibers; reactive dyes used for cellulose fibers such as cotton and rayon (reactions) Dye); etc. are known.

Japanese Patent Laid-Open No. 06-128881 Japanese Patent Laid-Open No. 10-058638 JP 2000-015926 A

  In the printing method using the transfer paper of Patent Documents 1 to 3, when a relatively thick fabric or a fabric having a relatively long foot such as a shirred fabric or a pile fabric represented by a towel is used as the material to be printed, the printing is performed. In some cases, there are problems such as generation of unevenness and reduction in printing density. For this reason, in these printing methods, when a relatively thick fabric or a fabric having a relatively long foot, such as a shirred fabric or a pile fabric, is used as the material to be printed, a printed product that can be used as a product is used. It was difficult to obtain stably.

  An object of the present invention is to provide printing unevenness for printing materials such as fiber materials and leather materials, particularly for printing materials with relatively thick fabrics or fabrics with relatively long hairs such as shirring fabrics and pile fabrics. It is an object of the present invention to provide a printing method that can suppress generation of ink and a decrease in printing density and is excellent in productivity.

  The above-described problems of the present invention can be solved by the following present invention.

(1) Printing an image with ink having a heat diffusible dye and / or a heat sublimation dye on a printing paper having a coating layer containing at least an inorganic pigment, a water-soluble synthetic resin and a natural resin on a paper support. From the step of obtaining a printed paper, the step of transferring moisture from the printed paper to the material to be printed by applying the moisture to the material to be printed, bringing the printed material and the printed paper into close contact, heating and pressing, and from the material to be printed A method for printing a material to be printed, which comprises a step of removing the printed paper and a step of fixing the dye transferred to the material to be printed in this order.

(2) The method for printing a material to be printed as described in (1) above, wherein the temperature for heating and pressure-bonding the material to be printed and the printed paper is 180 ° C. or higher and 220 ° C. or lower and the time for heating and pressure-bonding is 1 second or shorter. .

(3) In the above (1) or (2), the moisture content of the material to be printed is 10% by mass to 30% by mass with respect to the material to be printed as the moisture content of the material to be printed after moisture is added. The printing method of the to-be-printed material of description.

  According to the present invention, it is possible to suppress the occurrence of uneven printing and a decrease in the printing density for a material to be printed of a relatively thick fabric or a fabric having a relatively long foot such as a shirring fabric or a pile fabric, A textile printing method with excellent productivity can be provided.

The present invention is described in detail below.
In the present invention, “printing paper” refers to paper that is used in a printing method and is in a blank state before an image to be transferred is printed. “Textile paper” refers to paper on which an image to be transferred to the textile paper is printed.

  The textile printing paper of the present invention can be obtained by providing a coating layer by coating and drying a coating layer coating solution on a paper support. Examples of the method of providing the coating layer include a method of coating and drying the coating layer coating liquid on the paper support using a conventionally known coating apparatus and drying apparatus in the papermaking field. Examples of the coating apparatus include a comma coater, a film press coater, an air knife coater, a rod blade coater, a bar coater, a blade coater, a gravure coater, a curtain coater, and an E bar coater. Furthermore, as a process of providing the coating layer, various printing methods such as a lithographic printing method, a relief printing method, a flexographic printing method, a gravure printing method, a screen printing method, and a hot melt printing method can be exemplified. Examples of the drying device include a linear tunnel dryer, an arch dryer, an air loop dryer, a hot air dryer such as a sine curve air float dryer, various drying devices such as a dryer using an infrared heating dryer, a microwave, and the like. be able to.

  The paper support of the present invention is usually a chemical pulp such as LBKP (Leaf Bleached Kraft Pulp), NBKP (Needle Bleached Kraft Pulp), GP (Groundwood Pulp), PGW (Pressure Groundwood Pulp), RMP (Refiner Mechanical Pulp), TMP (ThermoMechanical Pulp), CTMP (ChemiThermoMechanical Pulp), CMP (Chemical Mechanical Pulp) , ChemiMechanical Pulp), CGP (ChemiGroundwood Pulp), etc., or DIP (DeInked Pulp) and other waste paper pulp, light calcium carbonate, heavy calcium carbonate, talc, clay, kaolin, etc. Various fillers, sizing agents, fixed Adjusting the paper stock containing various additives such as adhering agents, yield agents, cationizing agents such as cationic resins and polyvalent cation salts, and paper strength agents to acidity, neutrality or alkalinity. This is a base paper made. In the paper stock, other additives include pigment dispersants, thickeners, fluidity improvers, antifoaming agents, foam inhibitors, mold release agents, foaming agents, penetrants, colored dyes, colored pigments, fluorescent One or more of whitening agents, ultraviolet absorbers, antioxidants, preservatives, antibacterial agents, water resistance agents, wet paper strength enhancers, dry paper strength enhancers, and the like are desired effects of the present invention. In the range which does not impair this, it can mix | blend suitably.

Further, the paper support of the present invention includes a base paper such as fine paper obtained by subjecting the base paper to a size press treatment with a surface sizing agent such as starch or polyvinyl alcohol, an undercoat base paper or an undercoat provided with an undercoat layer on the base paper or the base paper. Examples include base paper, base paper or base paper, or coated paper such as art paper, coated paper, cast coated paper, and the like. The basis weight of the paper support is not particularly limited. 10 g / m ² or more and 100 g / m ² or less is preferable, and 40 g / m ² or more and 80 g / m ² or less is more preferable from the viewpoint of easy handling for printing. Further, the thickness of the printing paper is not particularly limited. From the viewpoint of ease of handling with respect to printing, the thickness of the printing paper is preferably 0.01 mm or more and 0.5 mm or less, and more preferably 0.05 mm or more and 0.3 mm or less.

The coating layer of the present invention is provided on the paper support surface by coating and drying a coating layer coating solution on the paper support. The coating layer is a clear region that can be distinguished from the paper support by electron microscope observation depending on the components of the coating layer. The coating layer of the present invention functions as a receiving layer for holding ink printed on printing paper, and the printing paper adheres to the printing material when the printing paper is in close contact with the printing material and heated and pressed. It is a layer having a function as an adhesive layer for carrying out and a function as a release layer for peeling the printed paper from the material to be printed. The coating amount of the coating layer is not particularly limited, but is preferably 5 g / m ² or more and 70 g / m ² or less in terms of dry solid content from the viewpoint of production cost of printing paper and adhesion to a material to be printed, and 15 g / m. ² or more and 30 g / m ² or less are more preferable.

  The coating layer having the above function contains an inorganic pigment, a water-soluble synthetic resin, and a natural resin.

  The inorganic pigment is a conventionally known inorganic pigment in the papermaking field, for example, heavy calcium carbonate, light calcium carbonate, kaolin, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate. Satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, silica, aluminum hydroxide, alumina, lithopone, zeolite, magnesium carbonate, magnesium hydroxide and the like. The inorganic pigment can be used in combination of one or more selected from the group consisting of these. Among these, the inorganic pigment is at least one selected from the group consisting of inorganic pigments containing silicon and aluminum such as kaolin, talc, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, silica, aluminum hydroxide, and alumina. Is preferred. Particularly preferred is at least one selected from the group consisting of aluminum silicate, silica, aluminum hydroxide and alumina.

  The water-soluble synthetic resin is water-soluble, has a strong film-forming property when heated, and has a reduced adhesive force in a humidified state. In the present invention, “water-soluble” means that 1% by mass or more can be finally dissolved or dispersed in 20 ° C. water. Such a water-soluble synthetic resin is a water-soluble synthetic resin conventionally known in the papermaking field as a binder or a binder, for example, a water-soluble polyvinyl alcohol resin, a water-soluble acrylic resin, a water-soluble styrene acrylic acid type Resin, water-soluble styrene maleic acid resin, water-soluble styrene acrylic maleic acid resin, water-soluble urethane resin, water-soluble urethane-modified ether resin, water-soluble polyester urethane resin, water-soluble polyether urethane resin, water-soluble Examples thereof include polyethylene oxide resins, water-soluble polyamide resins, water-soluble phenol resins, water-soluble vinyl acetate resins, water-soluble polyester resins, and water-soluble polyvinyl acetal resins. The water-soluble synthetic resin can be used alone or in combination of two or more selected from the group consisting of these. Among these, the water-soluble synthetic resin is preferably at least one selected from the group consisting of water-soluble polyvinyl alcohol resins, water-soluble acrylic resins, water-soluble polyester resins, and water-soluble polyether urethane resins.

  The natural resin is usually obtained by processing a raw material of a naturally produced resin as it is or physically or chemically. Natural resin exhibits adhesive strength, but does not increase in adhesive strength due to heating, and is hydrophilic. Natural resins are highly compatible with dyes and absorb and retain dyes uniformly. Such natural resins can be classified into, for example, animal-derived resins and plant-derived resins. Examples of the resin derived from animals include casein, gelatin, and protein. Examples of plant-derived resins include starch and cellulose, and various modified starches and carboxymethylcellulose processed using these as starting materials. More specifically, plant-derived resins include, for example, natural gums such as etherified tamarind gum, etherified locust bean gum, etherified guar gum and acacia arabic gum; carboxymethylcellulose, etherified carboxymethylcellulose and hydroxyethylcellulose. Cellulose derivatives; starch derivatives such as starch, glycogen, dextrin, oxidized starch, etherified starch and esterified starch; sodium alginate and agar. The natural resin can be used alone or in combination of two or more selected from the group consisting of these. Among these, the natural resin is preferably at least one selected from the group consisting of natural gums, cellulose derivatives such as carboxymethylcellulose, starch derivatives such as etherified starch, and sodium alginate.

  The content ratio by mass of the inorganic pigment, water-soluble synthetic resin and natural resin in the coating layer is 50 to 1750 parts by mass of the water-soluble synthetic resin and natural to 100 parts by mass of the inorganic pigment in terms of dry solid content. The range of 25 to 500 parts by mass of the resin is preferable. When the content ratio is within the above range, the printed paper can be more easily peeled off from the material to be printed, or the occurrence of uneven printing can be suppressed.

  The coating layer contains conventionally known auxiliaries in the printing method using printing paper in order to optimize various physical properties of the coating layer coating liquid and improve the dyeing property of the transferred dye. Can do. As the auxiliary agent, for example, various surfactants, thickeners, humectants, wetting agents, pH adjusting agents, alkali agents, thickening agents, preservatives, antibacterial agents, antifoaming agents, deaerators and reducing agents An inhibitor etc. can be mentioned.

  The “process for obtaining printed paper by printing an image on a printing paper with an ink having a thermal diffusible dye and / or a heat sublimation dye” in the present invention is an ink containing a thermal diffusible dye and / or a heat sublimation dye. This is a step of forming an image on a textile paper by a conventionally known printing means to be used. Thermally diffusible dyes and / or heat sublimable dyes are conventionally known in the printing field, and examples include reactive dyes, acid dyes, metal complex dyes, direct dyes, disperse dyes, and cationic dyes. it can.

  The ink having the heat diffusible dye and / or the heat sublimation dye is obtained by dissolving or dispersing the dye with a dye dissolving agent or a dispersing agent. Examples of the dye solubilizer include water, thiodiglycol, polyethylene glycol, glycerin, ethylene glycol, and ε-caprolactam. The ink further contains an anti-drying agent, a surface tension adjusting agent, a viscosity adjusting agent, a pH adjusting agent, an antiseptic agent, an antibacterial agent, a sequestering agent, an antifoaming agent, a degassing agent and the like as necessary. Can do.

  The printing means is not particularly limited. Examples of printing means include screen printing, gravure printing, offset printing, letterpress printing, flexographic printing, electrophotographic recording, and inkjet recording. Among these, the ink jet recording method is preferable from the cost of the printing press and the print image quality.

  In the present invention, “the process of applying moisture to the material to be printed and then bringing the material to be printed and the printing paper into close contact with each other and heating and pressing to transfer the dye from the paper to the material to be printed” is applied to the material to be printed. In this step, moisture is applied, and the dyed material is transferred from the printed paper to the material to be printed by bringing the printed material to which the moisture has been applied and the printed paper into close contact with each other and heating and pressing.

  The method for applying moisture to the material to be printed is not particularly limited. For example, it is a conventionally known method, in which a material to be printed is immersed in a container filled with water and then squeezed with a roller nip or the like, a method for spraying a material to be printed with a spraying device such as spray or rotor dampening, steam Examples thereof include a method of ejecting from a nozzle or the like and supplying the material to be printed.

  A material to be printed with a fabric having relatively long hair, such as a shirred fabric or a pile fabric, has a moisture content of 6% by mass or less in a normal temperature and normal humidity state when feeling dry by human touch. “Moisture provision” in the present invention is to increase the water content of the material to be printed after the water provision to more than 6% by mass. The moisture content to the material to be printed is preferably 10% by mass or more and 30% by mass or less, more preferably 10% by mass or more and 20% by mass or less, based on the material to be printed, as the moisture content of the material to be printed after moisture is added. This is because it is possible to further suppress at least one of the occurrence of uneven printing and the reduction of the printing density. In order to make the printing density of the image formed on the printing material uniform, it is preferable to apply water to the printing material as uniformly as possible.

  Various additives can be contained in the moisture to be applied to the material to be printed, if necessary. For example, an alkali agent, urea, a hydrophilic thickener, a dyeing improver, a migration inhibitor, and the like can be given.

  The method of heating and press-bonding the material to be printed and the printed paper in close contact is a conventionally known method for printing using printed paper. For example, a method of heating and pressurizing a printing paper and a material to be printed by using a crimping machine, a heating roller, a heating drum, and the like can be given.

  The method of heating and press-bonding the material to be printed and the paper to be in close contact is as follows: (1) the paper to be printed and the material to be printed are in close contact, and (2) the dye is satisfactorily transferred from the paper to the material to be printed. (3) There is no particular limitation as long as it is a condition that the moisture of the material to be printed can be vaporized to such an extent that bleeding does not occur. The linear pressure for heating and pressure bonding is preferably 10 kg / cm or more and 200 kg / cm or less. The heating / crimping temperature is preferably 120 ° C. or higher and 240 ° C. or lower, and particularly the heating / crimping temperature for materials to be printed on relatively thick fabrics or fabrics with relatively long feet such as shearing fabrics and pile fabrics. Is preferably 180 ° C. or higher and 220 ° C. or lower. The heating / crimping time is preferably 3 seconds or less. Especially, the heating / crimping time for materials to be printed on relatively thick fabrics or fabrics with relatively long feet such as shirring fabrics and pile fabrics. 1 second or less is preferable, and 0.3 second or more and 1 second or less is more preferable. The reason for this is that at least one of the occurrence of uneven printing and the decrease of the printing density is further suppressed.

  The “step of removing the printed paper from the material to be printed” of the present invention is a step of physically peeling the printed paper from the material to be printed. The method for removing is not particularly limited. The removal method is a conventionally known method in the textile printing field. In the “process of removing the printed paper from the material to be printed”, the material to be printed and the printed paper are easily removed by drying and heating in the process of heating and press-bonding the printed material and the printed paper in close contact. When it is difficult to remove, it is preferable to add some moisture to the printed paper before removal.

  The “step of fixing the dye transferred to the material to be printed” of the present invention is a step of fixing the dye transferred to the material to be printed, and is a step of fixing the dye conventionally known in the printing field. Examples of the fixing treatment include heating by steam that is usually performed in printing using a reactive dye or the like, and heating in a state where humidification or moisture is applied. When the material to be printed is polyester fiber or synthetic fiber, a method of drying and heating may be employed.

  As the conditions for the fixing treatment, the conditions for fixing dyes by steaming or the like that are conventionally known in the textile printing field can be used as they are. For example, it is possible to apply a condition of steaming from the side where the printed paper of the material to be printed is in close contact with steam at 100 ° C. or higher and 220 ° C. or lower. Further, when the dye is a reactive dye, a condition of steaming of 100 ° C. or more and 105 ° C. or less and 5 minutes or more and 20 minutes or less by a one-phase steam fixing method can be applied. In addition, the same conditions as in the steaming by the two-phase method (for example, the cold fix method) can be applied. When the dye is an acid dye, a condition of steaming of 100 ° C. to 105 ° C. and 10 minutes to 60 minutes can be applied. When the dye is a disperse dye, conditions of HT steaming or drying heat treatment of 160 ° C. or more and 220 ° C. or less and 1 minute or more and 15 minutes or less can be applied.

  The material to be printed after the fixing treatment can be subjected to a conventionally known washing treatment in the printing field such as washing with water or soaping. For example, in the case of disperse dyes, the procedures are washing with water, reducing washing, and washing with water, and in other cases, the procedures are washing with water, soaping, and washing with water. By performing the water washing treatment, it is possible to obtain a material to be printed having a fine texture and a delicate and dense image.

  The material to be printed is a fiber material or a leather material, but is not limited thereto. The fiber material may be a natural fiber material or a synthetic fiber material. Examples of natural fiber materials include cellulosic fiber materials such as cotton, hemp, lyocell, rayon and acetate, and protein fiber materials such as silk, wool and animal hair. Examples of synthetic fiber materials include polyamide fibers (nylon), vinylon, polyester, polyacryl, and the like. Examples of leather materials include cows, buffalos, pigs, horses, sheep, goats, kangaroos, natural leathers such as deer, sharks, sharks, sharks, camels, and processed leathers that have been dried through known leather / tanning processes. be able to. In the present invention, examples of the configuration of the fiber material or leather material include woven fabrics, knitted fabrics, non-woven fabrics, leathers and the like alone, mixed spinning, blended fibers, and interwoven fabrics. Further, it may be combined. Since the effect of the present invention is remarkably recognized, the material to be printed is preferably a relatively thick fabric or a fabric having a relatively long bristle such as a shirred fabric or a pile fabric.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples. Here, “parts” and “%” represent “parts by mass” and “mass%” of the amount of dry solids or the amount of substantial components, respectively. The coating amount of the coating layer represents the dry solid content.

[Example 1]
<Preparation of coating layer coating solution>
50 parts of silica (Mizukasil P-78A, manufactured by Mizusawa Chemical Industry Co., Ltd.), 50 parts of aluminum silicate (KYOWARD 700SN, manufactured by Kyowa Chemical Industry Co., Ltd.), 400 parts of water-soluble polyester resin (Pesresin A-684G, manufactured by Takamatsu Yushi Co., Ltd.) , 50 parts of polyvinyl alcohol (PVA217, manufactured by Kuraray Co., Ltd.), 200 parts of modified starch (Nikka gum 3A, manufactured by Nikka Chemical Co., Ltd.), 200 parts of urea, 15 parts of surfactant (MAC-100S, manufactured by Kitahiro Chemical Co., Ltd.), sodium carbonate 200 parts was added to 800 parts of water and stirred well with a stirrer to prepare a coating layer coating solution.

<Preparation of printing paper>
As the paper support, high-quality paper having a basis weight of 77 g / m ^{2 and} a thickness of 95 μm was used. The above coating layer coating solution was applied to one surface of the paper support using an air knife coater and dried. At this time, the coating amount of the coating layer was 20 g / m ² .

<Preparation of printed paper>
Reactive dye ink liquid (CI Reactive Blue 19 15%, polyethylene glycol 5%, glycerin 5%, ε-caprolactam 5%, ion-exchanged water 70%), reactive dye ink liquid (CI Reactive Red 226 10 %, Polyethylene glycol 5%, glycerin 5%, ε-caprolactam 5%, ion exchange water 75%), reactive dye ink liquid (CI Reactive Yellow 95 15%, polyethylene glycol 5%, glycerin 5%, ε- Caprolactam 5%, ion exchanged water 70%), and reactive dye ink solution (CI Reactive Black 5 15%, polyethylene glycol 3%, glycerin 7%, ε-caprolactam 5%, ion exchanged water 70%), Inkjet printer (J 4, mounted on steel Mimaki Corporation), the ink jet printer with printing paper (roll paper) coating layer printed side to the evaluation image provided to result in an printing paper (roll paper).

<Printing>
Printing was performed in an environment of 23 ° C. and 50% RH. A cotton towel made of shirred fabric was used as the material to be printed. A towel was dipped in a vat filled with water and moistened, and then passed through a roller nip to squeeze the water. The moisture content of the towel after pressing was 35%. Heating and pressure bonding (temperature 160 ° C., linear pressure 100 kg / cm, roller rotation speed 0.7 m / min, pressure bonding time 3 seconds, roller type) by adhering the moisture-given towel and printed paper, and dyeing Transcribed. Next, the printed paper was peeled from the towel. After the printed paper was peeled off, the dye was fixed by steaming at 100 ° C. for 15 minutes, and a towel was printed. Next, the towel was washed with water, soaped, washed with water and dried by a conventional method.

[Example 2]
In Example 1, Example 2 was performed in the same manner as in Example 1 except that the temperature for heating and press-bonding the towel and the printed paper was 185 ° C.

[Example 3]
In Example 2, Example 3 was carried out in the same manner as in Example 2 except that the rotation speed of the roller during heating and pressure bonding was 2.1 m / min (pressure bonding time 1 second).

[Example 4]
In Example 3, the water content was adjusted to 35% by spraying water on the surface side where the towel comes into contact with the printed paper in place of the method of immersing, moistening and pressing the towel in a vat filled with water. Except that, Example 4 was performed in the same manner as Example 3.

[Example 5]
In Example 4, it carried out similarly to Example 4 except having adjusted the moisture content of the towel to 20%, and was set as Example 5.

[Example 6]
In Example 5, it carried out similarly to Example 5 except having adjusted the moisture content of the towel to 14%, and was set as Example 6.

[Example 7]
In Example 6, Example 7 was carried out in the same manner as in Example 6 except that the temperature for heating and press-bonding the towel and the printed paper was 200 ° C.

[Example 8]
In Example 6, Example 8 was carried out in the same manner as Example 6 except that the temperature for heating and pressing the towel and the printed paper was 225 ° C.

[Example 9]
In Example 7, it carried out similarly to Example 7 except having adjusted the moisture content of the towel to 10%, and was set as Example 9.

[Example 10]
In Example 7, Example 10 was carried out in the same manner as in Example 7 except that the rotation speed of the roller during heating and pressure bonding was 4 m / min (pressure bonding time 0.53 seconds).

[Example 11]
In Example 7, Example 11 was carried out in the same manner as in Example 7 except that the rotation speed of the roller at the time of heating and pressure bonding was 8 m / min (pressure bonding time 0.26 seconds).

[Comparative Example 1]
In Example 1, it carried out similarly to Example 1 except not giving a water | moisture content to a towel, and was set as the comparative example 1. The water content of the towel was 6%.

[Comparative Example 2]
In Example 7, it carried out similarly to Example 7 except not giving a water | moisture content to a towel, and was set as the comparative example 2. The water content of the towel was 6%.

  About the printed towel obtained by each Example and each comparative example, printing unevenness and printing density were evaluated. The evaluation results are shown in Table 1.

<Evaluation of printing unevenness>
The printing unevenness of each solid portion of the four colors of the printed towel was observed, and the degree of occurrence of the printing unevenness was sensory evaluated. In the present invention, if the evaluation is A to C, it is assumed that the printing unevenness is suppressed.
A: Good.
B: Although inferior to A, it is generally good.
C: Although inferior to B, there is no practical problem.
D: Printing unevenness is recognized, which causes a problem in practical use.

<Evaluation of printing density>
The printing dyeing density of each solid portion of the four colors of the printed towel was observed, and the printing dyeing density was sensory evaluated. In the present invention, if the evaluation is A to C, it is assumed that the decrease in the printing dyeing density is suppressed.
A: Good.
B: Although inferior to A, it is generally good.
C: Although inferior to B, there is no practical problem.
D: The printing dyeing density is insufficient, which causes a practical problem.

As is apparent from Table 1, it has a "process of applying moisture to a material to be printed and then transferring the dye from the printed paper to the material to be printed by closely contacting the material to be printed and heating and pressing." It can be seen that in each of the examples of the printing method of the present invention, it is possible to obtain a material to be printed in which the occurrence of uneven printing and the reduction of the printing density are suppressed.
On the other hand, each printing method does not have "a step of transferring moisture from a printed paper to a material to be printed by bringing the printed material and the printed paper into close contact with each other and applying heat and pressure after the moisture is applied to the material to be printed" It can be seen that in the comparative example, it is not possible to obtain a material to be printed in which the occurrence of uneven printing and the decrease in the printing density are suppressed.

  Moreover, regarding the temperature at the time of heating and pressure bonding, mainly, the comparison between Example 1 which is 160 ° C. and Example 2 which is 185 ° C., Example 6 which is 185 ° C., Examples 7 and 225 ° C. which are 200 ° C. From the comparison of Example 8, it can be seen that the temperature for heating and pressure bonding is preferably in the range of 180 ° C. or higher and 220 ° C. or lower.

  Further, with respect to the time for heating and pressure bonding, mainly, Example 2, which is 3 seconds, Example 3, which is 1 second, Example 7, which is 1 second, Examples 10 and 0.26, which are 0.53 seconds. From the comparison of Example 11 that is seconds, it can be seen that the heating and pressure bonding time is preferably in the range of 1 second or less.

  In addition, with respect to moisture application to the material to be printed, Example 4 in which the moisture content is 35%, Example 5 in which the moisture content is 20%, Example 6 in which the moisture content is 14%, and the moisture content are From the comparison between Example 7 where the content is 14% and Example 9 where the water content is 10%, “dye is obtained by applying water to the material to be printed and then heating and pressure-bonding the material to be printed and the printed paper. In the step of transferring the ink from the printing paper to the material to be printed, the moisture content to the material to be printed is preferably in the range of 10% or more and 30% or less with respect to the material to be printed as the moisture content of the material to be printed after the moisture is given. I understand.

In addition, the present invention is particularly effective for a material to be printed which is a fabric having a relatively long bristle, such as a shirred fabric or a pile fabric recognized for towels and carpets.
The present invention is a method for printing a material to be printed, which has a “step for removing the printed paper from the material to be printed” and a “step for fixing the dye transferred to the material to be printed” in this order. As long as the range is not impaired, the order of “the step of removing the printed paper from the material to be printed” and “the step of fixing the dye transferred to the material to be printed” can be switched.

Claims (3)

  An image is printed on a printing paper having a coating layer containing at least an inorganic pigment, a water-soluble synthetic resin and a natural resin on a paper support with an ink having a heat diffusible dye and / or a heat sublimation dye, thereby producing a printed paper. A step of transferring the dye from the printed paper to the material to be printed by attaching the water to the material to be printed and then bringing the printed material and the printed paper into close contact with each other, heating and pressing, and printing the paper from the material to be printed. A method for printing a material to be printed, which comprises a step of removing and a step of fixing the dye transferred to the material to be printed in this order.   The method for printing a material to be printed according to claim 1, wherein the temperature for heating and pressure-bonding the material to be printed and the printed paper is 180 ° C to 220 ° C, and the time for heating and pressure-bonding is 1 second or less.   The printing of the material to be printed according to claim 1 or 2, wherein the moisture content to the material to be printed is 10% by mass or more and 30% by mass or less with respect to the material to be printed as the moisture content of the material to be printed after the water is added. Method.