JP6461578B2 - Printing paper used for paper printing - Google Patents

Description

  The present invention relates to a printing paper used for printing by a textile printing method in a transfer printing method onto a printing material such as a fiber material or leather material. Preferably, it is related with the textile paper used for a paper textile printing method.

  There is a textile printing method as a method for drawing a pattern firmly and finely with a dye on a fiber material or leather material. The textile printing method is roughly classified into a plate making printing method using plate making and a plate making printing method not using plate making.

  As the textile printing method by the plate-making printing method, screen textile printing, roller textile printing, rotary screen textile printing, gravure printing, a method using these printing techniques, and the like are known and have already been carried out industrially. However, in textile printing of the plate-making printing method, the number of colors is limited in order to produce a plate. Among these, printing by the three primary color separation type plate making can express multicolor feeling, but has problems represented by the following (a) to (d). (A) It is difficult to adjust the hue and density of the three primary color compositions. (B) Since the multi-layer is formed, the reproducibility of the printing process is poor. (C) In small lot production, the plate making cost is high. (D) In the printing process, it is necessary to prepare an excess of the color paste from the amount necessary for processing.

  As a textile printing method for solving the above-mentioned problems, there is a textile printing method by a prepress printing method. The plate-free printing method is a method of printing a design on a printing material using an ink jet printing method using a water-based dye ink, for example, using image processing and image forming technology by a computer or the like. There are two types of textile printing methods: the direct printing method, which prints directly on the substrate, and the transfer printing method, where the design is printed once on a paper called textile or transfer paper and then transferred to the substrate. is there.

  In addition, expensive release agents and release layers are not required for printed paper, the release of the printed paper is good, there is little water contamination in the washing process after printing, and the fineness, fastness and color development. A new transfer printing type textile printing method (hereinafter referred to as “paper textile printing method”) is known (for example, see Patent Document 1). In the paper printing method described in Patent Document 1, a mixed ink composed of a water-soluble synthetic binder, a natural glue, and an auxiliary agent is applied to a base paper and dried on a printing paper obtained by drying. The step of printing to obtain a printed paper, the step of adhering the printed paper to the printing material, the step of applying pressure and heating, and the fixing of the dye with the printing paper attached to the printed material, It is characterized by having a step of removing printed paper.

  The printing paper used in the paper printing method described in Patent Document 1 is obtained by applying a mixed paste composed of a water-soluble synthetic binder, a natural paste and an auxiliary agent to a base paper and drying it. .

Japanese Patent No. 4778124

  By the way, in the paper textile printing method, the following qualities (1) to (3) are required for textile paper. (1) Due to the demand for image quality, it is required that the image transferred to the printing material through the printing paper on which the image to be transferred to the white printing paper is printed, that is, “image definition” is required. (2) Since the printed paper after the image to be transferred to the printing paper, which is generally white paper, is printed is stored in a wound state, it is possible to prevent the image printed on the printed paper from being lost due to show-through. That is, “show-through suppression” is required. Here, “show-through” is a phenomenon in which an image printed on a textile paper is taken on the back side of another textile paper. (3) In the paper textile printing method, after the printed paper and the printed material are brought into close contact with each other, a dye fixing process (for example, steaming, humidification, or drying and heating at a high temperature) is performed. If the contact between the printed paper and the printed material is not sufficient during the fixing process, color unevenness may occur in the solid image portion to be uniformly transferred. Adhesion to such an extent that the color unevenness does not occur, that is, “adhesion” is required.

  However, since the textile paper described in Patent Document 1 has not been sufficiently studied with respect to the base paper, the quality required for the textile paper in the paper textile printing method cannot always be satisfied.

  An object of the present invention is to be used in a paper printing method having the above-mentioned quality (1) to (3) required for a printing paper used in a paper printing method, that is, image fineness, show-through suppression and adhesion. It is to provide printing paper.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the above-mentioned problem is a printing paper used in a paper printing method in which a dye fixing process is performed while the printed paper is in close contact with a printing material. A textile having a base paper and a paste layer on the base paper surface, and the smoothness of the base paper measured in accordance with (according to) JIS P 8119: 1998 is 15 seconds or more and 100 seconds or less I found out that it was solved by paper. The inventors of the present invention have made further studies and completed the present invention.

That is, the present invention relates to the following textile paper and the like.
[1] A printing paper used in a paper printing method in which a dyeing paper is adhered to a substrate to be printed, and has a base paper and a paste layer on the surface of the base paper, according to JIS P 8119: 1998. A textile printing paper characterized in that the smoothness of the base paper measured in conformity is 15 seconds or more and 100 seconds or less.
[2] The adhesive layer includes at least a water-soluble synthetic binder and a natural glue, and at least one of the water-soluble synthetic binders is a water-soluble polyester binder having a glass transition temperature of 51 ° C. or higher. ] The textile printing paper as described in.

  According to the present invention, it is possible to provide a printing paper that can form a fine image on an object to be printed, is excellent in suppression of show-through, and has excellent adhesion in a dye fixing process, and is used in a paper printing method.

The present invention is described in detail below.
In the present invention, “printing paper” refers to paper that is used in a paper 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. Hereinafter, the printing paper used for the paper printing method is referred to as “printing paper”.

  In the present invention, the paper textile printing method is a textile printing method of a transfer printing method described in Patent Document 1. That is, the paper printing method is a process in which a paste layer coating solution comprising a water-soluble synthetic binder, a natural glue and an auxiliary agent is applied to the surface of the base paper and dried to obtain a printed paper, and the resulting printed paper A process for obtaining a printed paper by printing an image using a dye ink on the top, a process for adhering the printed paper to the substrate to be printed, heating and pressurizing, and a state in which the dye is applied to the substrate to be printed. This is a transfer printing type textile printing method having a process of performing a fixing process and then removing the textile paper.

  In the present invention, the textile paper has a base paper and a paste layer on the surface of the base paper, and the smoothness of the base paper measured in accordance with JIS P 8119: 1998 is 15 seconds or more and 100 seconds or less. The textile printing paper can achieve show-through suppression and adhesion by a synergistic effect combining the smoothness of the base paper according to the present invention and the adhesive layer according to the present invention. The reason for this is unknown, but if the smoothness of the base paper is relatively low, the force applied to the glue layer during adhesion will not be uniform, and if the smoothness of the base paper is relatively high, the contact surface will increase and show-through will occur. It is considered a thing.

  In the present invention, the base paper is usually a chemical pulp such as LBKP (Leaf Bleached Kraft Pulp), NBKP (Needle Bleached Kraft Pulp), GP (Groundwood Pulp), PGW (Pressure Ground Wood Pulp), RMP (Refiner Mechanical Pulp), Mechanical pulp such as TMP (ThermoMechanical Pulp), CTMP (ChemiThermoMechanical Pulp), CMP (ChemiMechanical Pulp), CGP (ChemiGroundwood Pulp), or used paper pulp such as DIP (DeInked Pulp), light calcium carbonate, heavy calcium carbonate, talc In addition, various additives such as sizing agents, fixing agents, retention agents, cationizing agents such as cationic resins and polyvalent cation salts, and paper strength agents are blended as necessary. Paper made by adjusting the paper stock to acidic, neutral or alkaline.

  In the present invention, in the stock of the base paper, as other additives, pigment dispersants, thickeners, fluidity improvers, antifoaming agents, antifoaming agents, mold release agents, foaming agents, penetrating agents, coloring dyes 1 type or 2 types or more of coloring pigments, fluorescent whitening agents, ultraviolet absorbers, antioxidants, preservatives, antibacterial agents, water resistance agents, wet paper strength enhancers, dry paper strength enhancers, etc. It can mix | blend suitably in the range which does not impair the desired effect of invention.

  In the present invention, the textile paper has a smoothness of the base paper measured in accordance with JIS P 8119: 1998 in the range of 15 seconds to 100 seconds. Preferably, the smoothness of the base paper is 25 seconds or more and 55 seconds or less. When the smoothness of the base paper exceeds 100 seconds, the show-through suppression is deteriorated. When the smoothness of the base paper is less than 15 seconds, the fineness of the image is lowered, the adhesion is deteriorated, and color unevenness may occur. When the smoothness of the base paper is 25 seconds or more and 55 seconds or less, the show-through suppressing property is further improved.

  In the present invention, the smoothness of the base paper is a value of smoothness measured according to JIS P 8119: 1998 “Paper and paperboard—Smoothness test method using Beck smoothness tester”.

  The smoothness of the base paper can be adjusted by a conventionally known method in the papermaking field. For example, a method of adjusting the press pressure in the paper making process, a method of adjusting the blending ratio of the filler in the stock, a method of performing a calendar process, a method of adjusting the degree of beating of pulp, a blending ratio of LBKP (Leaf Bleached Kraft Pulp) It is a method of adjusting. It is preferable to adjust the smoothness of the base paper by combining these methods.

In the present invention, the basis weight of the base paper 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.

  In the present invention, the printing paper has a paste layer on the surface of the base paper. The adhesive layer is provided on the surface of the base paper by applying the adhesive layer coating liquid to the base paper and then drying it. The glue layer may be present on the base paper, partially permeate the base paper and the base paper, or permeate the base paper. The glue layer refers to a clear layer formed by a coated component and distinguishable by, for example, observation with an electron microscope. The adhesive layer of the present invention functions as an ink receiving layer for holding dye ink printed on a printing paper, and strongly adheres the printing paper to the printing material when the printing paper is in close contact with the printing material and heated and pressurized. It is a layer having a function as an adhesive layer and a function as a release layer in which the adhesive force is reduced by a dye fixing process (for example, steaming, humidification, or drying and heating process at a high temperature).

The amount of the glue layer applied to the base paper surface is not particularly limited. The coating amount is preferably 5 g / m ² or more and 70 g / m ² or less, more preferably 15 g / m ² or more and 30 g / m ² or less in terms of dry solid content, from the viewpoint of the production cost of printing paper and the adhesion to printed matter. .

  In the present invention, the method for providing the glue layer on the surface of the base paper is not particularly limited. For example, in the papermaking field, coating and drying can be performed using a conventionally known coating apparatus and drying apparatus. 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, examples of the method for providing the adhesive layer include 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. Examples of dryers include various dryers such as straight tunnel dryers, arch dryers, air loop dryers, sine curve air float dryers, hot air dryers, infrared heating dryers, dryers using microwaves, etc. Can do.

  The glue layer having the above function preferably contains a water-soluble synthetic binder and a natural glue.

  The water-soluble synthetic binder possessed by the adhesive layer is usually water-soluble, has a strong film-forming property when heated, and has a weak adhesive force in a humidified state. Examples of the water-soluble synthetic binder of the present invention include those which do not inhibit the fixing treatment and are synthesized mainly by petrochemistry. In the present invention, “water-soluble” means that 1% by mass or more can be dissolved or dispersed in 20 ° C. water.

  Examples of such water-soluble synthetic binders include water-soluble polyvinyl alcohol binders, water-soluble acrylic binders, water-soluble urethane binders, water-soluble urethane-modified ether binders, water-soluble polyethylene oxide binders, water-soluble polyamides. Binder, water soluble phenolic binder, water soluble vinyl acetate binder, water soluble styrene acrylic acid binder, water soluble styrene maleic acid binder, water soluble styrene acrylic maleic binder, water soluble polyester binder, water soluble polyvinyl Examples include acetal binders, water-soluble polyester urethane binders, water-soluble polyether urethane binders, and water-soluble hot melt adhesives. The water-soluble synthetic binder can be used alone or in combination of two or more selected from the group consisting of these. Among these, the water-soluble synthetic binder is selected from the group consisting of a water-soluble polyvinyl alcohol binder, a water-soluble acrylic binder, a water-soluble polyester binder, a water-soluble polyether urethane binder, and a water-soluble hot melt adhesive. At least one is preferable in that it is excellent in water-solubility and temporary adhesiveness (property that adheres by heating but decreases in adhesive strength in a humidified state) and does not hinder the fixing process.

  Examples of the water-soluble hot melt adhesive include an alkaline water-soluble hot melt adhesive of a maleic acid alternating copolymer, a water sensitive hot melt adhesive, and a polyvinyl alcohol hot melt adhesive.

  At least one of the water-soluble synthetic binders is preferably a water-soluble polyester binder having a glass transition temperature of 51 ° C. or higher. The glass transition temperature of the water-soluble polyester binder is more preferably 51 ° C. or more and 100 ° C. or less, and further preferably 51 ° C. or more and 80 ° C. or less. The reason for this is that when the water-soluble polyester binder has a glass transition temperature of 51 ° C. or higher, coating unevenness when a paste layer is provided is suppressed. As a result of suppressing the coating unevenness, the image printed on the printing material becomes better.

  In the present invention, the water-soluble polyester-based binder is a resin obtained by a polycondensation reaction from a polyvalent carboxylic acid and a polyol, and the polyvalent carboxylic acid and the polyol as components constitute 60% by mass or more of the resin. Say what you occupy. Examples of the polyvalent carboxylic acid include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, adipic acid, succinic acid, sebacic acid, dodecanedioic acid, and the like. It is preferable to select and use. Examples of the polyol include ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, cyclohexane dimethanol, bisphenol, and the like. It is preferable to use one or more selected from the group consisting of. In addition, the water-soluble polyester binder can be copolymerized with a component having a hydrophilic group such as a carboxyl group or a sulfonic acid group in order to enhance water solubility. Further, the glass transition temperature of the water-soluble polyester binder can be adjusted by selecting these polyvalent carboxylic acids and polyols. Alternatively, other components can be copolymerized in order to adjust the glass transition temperature of the water-soluble polyester binder.

  Water-soluble polyester-based binders are commercially available from Kyoyo Chemical Industry Co., Ltd., Takamatsu Yushi Co., Ltd., Unitika Co., Ltd., etc., and these commercial products can be used in the present invention.

  In the present invention, the glass transition temperature can be determined by measuring with a differential scanning calorimeter such as EXSTAR 6000 (manufactured by Seiko Denshi), DSC220C (manufactured by Seiko Denshi Kogyo), DSC-7 (manufactured by PerkinElmer). The intersection of the baseline and the endothermic peak slope is defined as the glass transition temperature.

  The natural sizing agent possessed by the adhesive layer is usually obtained by processing the raw material of the sizing agent produced in nature as it is or physically or chemically. Further, the natural paste exhibits an adhesive force, but does not increase the adhesive force even when heated, and is a hydrophilic material that can be removed by fixing treatment or drying and heating. The natural paste has high compatibility with the dye ink and has a property of uniformly absorbing and holding the dye ink.

  Such natural pastes can be classified into animal pastes, plant pastes, and mineral pastes. Examples of animal pastes include gelatin extracted from collagen contained in animal skin and bone. Examples of plant pastes include starch and carboxymethylcellulose processed using cellulose as a starting material. Examples of the mineral paste include clay collected from clay minerals. More specifically, for example, natural gum paste (etherified tamarind gum, etherified locust bean gum, etherified guar gum, acacia arabic gum, etc.), cellulose derivatives (carboxymethylcellulose, etherified carboxymethylcellulose, hydroxyethylcellulose etc.), starch Derivatives (starch, glycogen, dextrin, amylose, hyaluronic acid, kudzu, konjac, potato starch, etherified starch, esterified starch, etc.), seaweed (sodium alginate, agar, etc.), mineral glue (bentonite, aluminum silicate and its) Derivatives, silicon oxides such as silica, diatomaceous earth, clay, kaolin, acid clay, etc.), animal glue (casein, gelatin, egg protein, etc.) and the like. One or two or more selected from these can be used in combination. Among these natural pastes, natural gum pastes, cellulose derivatives such as carboxymethylcellulose, starch derivatives such as etherified starch, seaweeds such as sodium alginate, mineral pastes such as silicon oxide, aluminum silicate, and clay, animals A system paste or the like is preferable.

  In the present invention, the content ratio of the water-soluble synthetic binder and the natural glue in the glue layer is the dry solid content, and the water-soluble synthetic binder to the natural glue is in the range of 95: 5 to 20:80. Is preferred. When the content ratio of the water-soluble synthetic binder and the natural paste is within this range, the printed paper is more easily peeled off from the printed material after the fixing treatment, or the dyed property of the transferred dye is increased. Further improvement or generation of uneven printing is suppressed.

  In the present invention, the paste layer of the textile paper can contain an auxiliary agent. The auxiliary agent is added to optimize various physical properties of the adhesive layer coating solution and improve the dyeing property of the transferred dye. As the auxiliary agent, for example, various surfactants, thickeners, humectants, wetting agents, pH adjusting agents, alkali agents, thickening agents, preservatives, antibacterial agents, degassing agents, antifoaming agents and reducing agents. An inhibitor etc. can be mentioned.

  For example, in the case of an anionic surfactant added as a surface tension reducing agent or a penetrating agent, the content of the auxiliary agent in the adhesive layer is 0.2% by mass or more and 5% by mass with respect to the dry solid content of the adhesive layer. % Or less. In addition, polyhydric alcohols such as polyethylene glycol, glycerin, thiodiglycol and diethylene glycol, moisturizers such as urea, thiourea and dicyandiamide, which are added to improve the adhesion and dyeing property between the printed paper and the printed material, In the case of a wetting agent, it is 1% by mass or more and 15% by mass or less with respect to the dry solid content of the glue layer. In the case of an acrylic synthetic thickener that is a thickener added to stabilize the coating, it is 3% by mass or less based on the dry solid content of the glue layer. In the case of antiseptics, antibacterial agents, antifoaming agents, degassing agents, and reducing inhibitors, the content is 0.1% by mass or more and 5% by mass or less based on the dry solid content of the paste layer. In the case of an alkaline agent such as soda ash, sodium bicarbonate, sodium silicate, sodium acetate, etc. added when using a reactive dye, it is 1% by mass or more and 25% by mass or less based on the dry solid content of the glue layer. In the case of a pH adjuster such as ammonium sulfate or sodium monophosphate added when a disperse dye or an acid dye is used, the content is 0.1% by mass or more and 3% by mass or less based on the dry solid content of the glue layer. The preferable effect of this invention is acquired as the compounding quantity of each adjuvant with respect to a paste is the said range.

  In the present invention, a printed paper can be formed by printing an image on the side of the printed paper having the adhesive layer using various conventionally known printing methods including a dye ink. The image is produced based on the pattern to be printed. When the textile printing paper has a glue layer on both surfaces of the base paper, it can be used without worrying about the front / back discrimination of the textile printing paper, which is more preferable.

  In the present invention, examples of various printing methods for printing an image on the side of the textile paper having the adhesive layer include a gravure printing method, an ink jet printing method, and a screen printing method. Among these, the ink jet printing method is preferable in terms of high image quality and downsizing of the apparatus.

  In the present invention, dye inks are conventionally known in textile printing methods, and examples include dye inks that use reactive dyes, acid dyes, metal complex dyes, direct dyes, disperse dyes, cationic dyes and the like as dyes. Can do. The dye ink is prepared by dissolving or dispersing these dyes and a dye solubilizer such as water by adding additives as necessary.

  The ink-jet printing type dye ink used in the paper printing method is obtained by dissolving or dispersing a 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 dye 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. be able to.

  The type of the dye may be selected from reactive dyes, direct dyes, acid dyes, metal complex salt type dyes, disperse dyes, cationic dyes, and the like according to the type of the substrate. When the disperse dye is converted into an ink, it is preferable to pulverize the disperse dye with an average particle size of about 0.1 μm by using a zirconium bead of 0.1 mm to 0.3 mm.

  In the present invention, the paper printing method is a method described in Japanese Patent No. 4778124, a step of obtaining a printed paper, a step of obtaining a printed paper, a step of adhering the printed paper to the printed material, and a printed paper. A step of performing a dye fixing process in a state in which the substrate is in close contact with the substrate, and a step of removing the printed paper. In the present invention, the contacting step includes heating and pressurization. After the printed paper and the printed material are brought into close contact with each other, a dye fixing process is performed in the close contact state. The heating and pressurizing conditions in the close contact process can be the same as those in the textile printing method using a conventionally known transfer printing method. For example, there is a method in which a printed paper is brought into close contact with a substrate by a heating drum or the like and heated and pressurized.

  In the present invention, the paper textile printing method includes a step of fixing the dye in a state where the textile paper and the printing material are in close contact with each other. Examples of the dye 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. Moreover, when the printing material is polyester fiber or synthetic fiber, a method of drying and heating may be employed. The printed paper can be peeled off by heating with steam or heating in a state of humidification or moisture application. In the case of printing of polyester fiber or synthetic fiber, the printed paper may be peeled off by drying and heating, but it is more possible to peel off the printed paper by applying moisture after drying and heating. Since it becomes easy, it is preferable to provide moisture after drying and heating.

  In the present invention, the conditions for the dye fixing process performed by bringing the printed paper into close contact with the substrate to be printed may be the same as the conditions for fixing by the dye steaming employed in the conventional direct printing method. it can. For example, it is possible to apply a condition that steaming is performed from the non-printing surface side of the printed paper with steam of 100 to 220 ° C. Moreover, when the dye is a reactive dye, a condition of steaming at 100 to 105 ° C. for 5 to 20 minutes by a one-phase steam fixing method can be applied. In the case of a paste layer that does not contain an alkaline agent, the same conditions as those for steaming by a two-phase method (for example, a cold fix method) can be applied. When the dye is an acid dye, a condition of steaming at 100 to 105 ° C. for 10 to 30 minutes can be applied. When the printed paper is peeled off from the substrate, the printed paper is easily peeled off in a state where moisture and moisture after steaming are applied. When the dye is a disperse dye, the conditions of HT steaming (high temperature steaming method) or drying heat treatment at 160 to 220 ° C. for 1 to 15 minutes can be applied. In some cases, the printed paper can be peeled off by dry heat treatment. However, since a small amount of moisture or moisture is applied after the dry heat treatment, the printed paper becomes easy to peel off. Is preferably given.

  In the present invention, the dye fixing treatment may be performed either after heating and pressurizing in the step of closely attaching the printed paper to the printing material or simultaneously with heating and pressurizing in the above-described adhering step. The dyed paper in the dye ink printed on the printing paper is transferred and dyed on the printing material by bringing the printing paper and the printing material into close contact, and heating, pressurizing and fixing the dye. In addition, the dye fixing process fixes the dye dyed on the printing material and reduces the adhesion between the printed paper and the printing material.

  After the printing paper is peeled off from the printing material after being fixed, the printing material can be subjected to a conventionally known cleaning treatment in the printing field such as water washing or soaping. For example, in the case of disperse dyes, the procedures are water washing, reduction washing, and water washing, and in the case of other dyes, the procedures are water washing, soaping, and water washing. By performing the water washing treatment, it is possible to obtain a printed material having a fine texture and a delicate and dense image. In the case of disperse dyes or when the printed material is a synthetic fiber such as polyester, even if washing is omitted, it is possible to obtain a printed material that has a fine texture and is fine and dense.

  In the present invention, examples of the printed material include, but are not limited to, fiber materials and leather materials. 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, etc., as well as processed leathers that have been dried through known leather / tanning processes. Can be mentioned.

  In the present invention, the constitution of the fiber material or leather material can include woven fabrics, knitted fabrics, nonwoven fabrics, leathers and the like alone, blended fibers, blended fibers or interwoven fabrics. Furthermore, these configurations may be combined. If necessary, the printed material may be pretreated with a drug that affects dyeing or a drug that is effective in promoting dyeing. For example, when a reactive dye is used, 3% by mass or more and 15% by mass or less of sodium carbonate, potassium carbonate, sodium bicarbonate, sodium silicate, sodium acetate, sesquicarbonate sodium carbonate, sodium trichloroacetate, etc. as an alkaline agent are printed. 3% to 25% by weight of urea for the purpose of preventing yellowing, improving printability, improving dyeing, etc., and 0.05% by weight to 1% by weight of a hydrophilic thickening substance such as sodium alginate as a migration inhibitor. You may pre-process with the pre-processing liquid contained in the following each concentration range. When an acid dye is used, an acid ammonium salt such as ammonium sulfate or ammonium tartrate is used in an amount of 0.5% by mass to 5% by mass as a dyeing improver, and an acid-resistant natural gum is used as a migration inhibitor in an amount of 0.05%. You may pre-process with the pre-processing liquid contained in each concentration range of the mass% or more and 0.5 mass% or less. In the present invention, pretreatment is usually unnecessary.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples, A various change and correction are possible in the range which does not deviate from the technical scope of this invention. Here, “parts” and “%” represent “parts by mass” and “mass%” of the amount of dry solids or the amount of substantial components, respectively. Moreover, the coating amount of the glue layer represents the dry solid content.

[Example 1]
<Preparation of adhesive layer coating solution>
300 parts of water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.), 30 parts of polyvinyl alcohol (AP-17, manufactured by Nihon Vinegar & Poval), etherified starch (Sorbitose C-5, manufactured by AVEBE) 120 parts, aluminum silicate derivative (Embatex D-23, manufactured by Kyoei Chemical Co., Ltd.) 60 parts, silicon oxide (Mizukacil P-78A, manufactured by Mizusawa Chemical Co., Ltd.) 55 parts, dicyandiamide 60 parts, 210 parts of soda ash, 90 parts of urea, 60 parts of thiourea, 15 parts of a surfactant (MAC-100S, manufactured by Kitahiro Chemical Co., Ltd.) and 930 parts of water are mixed while stirring well with a stirrer to obtain a paste layer coating solution Was prepared.

<Preparation of printing paper>
A high-quality paper having a basis weight of 77 g / m ² and a smoothness of 40 seconds was used as the base paper. The glue layer coating solution was applied to one surface of the base paper using an air knife coater and dried to obtain a printed paper. At this time, the coating amount of the glue layer was 20 g / m ² .

<Preparation of printed paper>
Using reactive dye ink solution (CI Reactive Blue 19 15%, polyethylene glycol 5%, glycerin 5%, ε-caprolactam 5%, ion-exchanged water 70%) on the side where the paste layer of printing paper is provided An evaluation image was printed by an inkjet printer (ValueJet VJ-1324, manufactured by Muto Kogyo Co., Ltd.) to obtain a printed paper (roll paper).

<Printing>
Cotton cloth was used as the substrate. The obtained printed paper and the cotton cloth were brought into close contact with each other, and heated and pressurized (190 ° C., 0.5 MPa, 2.5 m / min, roller type) to attach the printed paper to the cotton cloth. With the printed paper still attached to the cotton cloth, the fixing process was performed by steaming at 100 ° C. for 15 minutes, and the dye ink was transferred to the cotton cloth for printing. Thereafter, the printed paper was peeled off.

  After the printed paper was peeled off, the cotton cloth was washed with water, soaped, washed with water and dried by a conventional method to obtain a printed material.

[Example 2]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 15 seconds was used as the base paper, and the printed material of Example 2 was obtained.

[Example 3]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 100 seconds was used as the base paper, and the printed material of Example 3 was obtained.

[Example 4]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 25 seconds was used as the base paper, and the printed material of Example 4 was obtained.

[Example 5]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 55 seconds was used as the base paper, and the printed material of Example 5 was obtained.

[Example 6]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 75 seconds was used as the base paper, and the printed material of Example 6 was obtained.

[Example 7]
In Example 1, a water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester binder (Pesresin A-615GE, glass transition temperature 47 ° C., Takamatsu Yushi Co., Ltd.) The printed material of Example 7 was obtained in the same manner as in Example 1 except that the product was changed to “Product”.

[Example 8]
In Example 1, a water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester binder (Pesresin A-613D, glass transition temperature 54 ° C., Takamatsu Yushi Co., Ltd.). The printed material of Example 8 was obtained in the same manner as in Example 1 except that the product was changed to “manufactured”.

[Example 9]
In Example 1, a water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester binder (Emulsion Elitel KA-5071S, glass transition temperature 67 ° C., Unitika). The printed material of Example 9 was obtained in the same manner as in Example 1 except that the product was changed to “manufactured”.

[Example 10]
In Example 1, a water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester binder (Emulsion Elitel KZA-6034, glass transition temperature 72 ° C., Unitika). The printed material of Example 10 was obtained in the same manner as in Example 1 except that the product was changed to “made by the company”.

[Example 11]
In Example 1, a water-soluble polyester binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester binder (Emulsion Elitel KZA-3556, glass transition temperature 80 ° C., Unitika). The printed material of Example 11 was obtained in the same manner as in Example 1 except that the product was changed to “made by the company”.

[Example 12]
In Example 1, a water-soluble polyester-based binder (Plus Coat RZ-142, glass transition temperature 34 ° C., manufactured by Kyoyo Chemical Industry Co., Ltd.) was used as a water-soluble polyester urethane-based binder (Hydran AP-20, glass transition temperature 27 ° C., DIC Corporation). The printed material of Example 12 was obtained in the same manner as in Example 1 except that the product was changed to “Product”.

[Comparative Example 1]
In Example 1, printing was performed in the same manner as in Example 1 except that high-quality paper having a smoothness of 6 seconds was used as the base paper, and a printed material of Comparative Example 1 was obtained.

[Comparative Example 2]
In Example 1, the same process as in Example 1 was performed except that high-quality paper having a smoothness of 150 seconds was used as the base paper, and a printed material of Comparative Example 2 was obtained.

  In Examples 1 to 12 and Comparative Examples 1 and 2, the following methods were used for the fineness of the image of the printing material, the suppression of show-through of the printed paper, the adhesion of the printed paper, and the coating unevenness suppression of the glue layer. Evaluation was performed. The results are shown in Table 1.

<Evaluation of image definition>
In the obtained printing material, whether or not the image clearly transferred to the details of the characters and designs of the evaluation image was formed was visually evaluated according to the following criteria. In this invention, if evaluation is 2-4, it shall be excellent in the precision of an image.
4: The color can be confirmed clearly in every detail, and it is extremely clear.
3: Clear.
2: The color can be confirmed over the details although it is not clear, and it is almost clear.
1: It is difficult to confirm the color in details, and it is unclear.

<Evaluation of show-through suppression>
In printed paper wound up in roll form at room temperature after printing the evaluation image, the dye ink show-through state on the back side of the printed paper after being left for 24 hours, and formed on the printed material produced using the printed paper The resulting image was visually evaluated according to the following criteria. In the present invention, if the evaluation is 2 or 3, the show-through suppression is excellent.
3: There is almost no show-through and the printed image is good.
2: Although show-through is slightly observed, the printed image has no practical problem.
1: Show-through is recognized, and the printed image is missing, which is a practical problem.

<Evaluation of adhesion of printed paper>
Heat and pressurize (190 ° C, 0.5MPa, 2.5m / min, roller type) using the printed image of the solid image of the printed paper that has been printed in roll form at room temperature. Affixed to a cotton cloth. With the printed paper still attached to the cotton cloth, the fixing process is performed by steaming at 100 ° C. for 15 minutes, and the image formed on the printed material is visually observed. The sensory evaluation was performed according to the criteria. In this invention, if it is evaluation 2, it shall be excellent in adhesiveness.
2: No color unevenness, which is a practical problem, is observed.
1: Color unevenness which is a problem in practical use is recognized.

<Evaluation of coating unevenness suppression>
In the printed paper obtained as described above, the surface on which the adhesive layer coating solution was applied was observed while applying oblique light. The results were visually evaluated according to the following criteria. In the present invention, if the evaluation is 2 or 3, coating unevenness is suppressed.
3: Almost no coating unevenness is observed.
2: Some coating unevenness is recognized.
1: Clear coating unevenness is observed.

As is clear from Table 1, it can be seen that the printed materials of Examples 1 to 12 in which the smoothness of the base paper is included in the scope of the present invention have the fineness of the image and are excellent in show-through suppression and adhesion. . Such effects cannot be obtained with the printed materials of Comparative Examples 1 and 2 that do not satisfy the smoothness according to the present invention.
Further, from the comparison between Examples 1 to 7 and 12 and Examples 8 to 11, when at least one of the water-soluble synthetic binders is a water-soluble polyester binder having a glass transition temperature of 51 ° C. or more, coating unevenness. Is suppressed, which is more preferable.

  The textile printing paper of the present invention is suitable as a textile printing paper used in the paper textile printing method because it can form a fine image on the printing material, has excellent anti-show-through properties, and excellent adhesion between the printing paper and the printing material.

Claims (1)

A printing paper used in a paper printing method in which a dye is fixed while a printing paper is kept in close contact with a substrate to be printed. The printing paper has a base paper and a paste layer on the surface of the base paper, in accordance with JIS P 8119: 1998. smoothness der than 100 seconds 15 seconds the base paper to be measured is, the glue layer, and a water-soluble synthetic binder and natural-based sizing agent at least containing at least one water-soluble synthetic binder printing paper, wherein the water-soluble polyester binder der Rukoto than the glass transition temperature of 51 ° C..