Dye-sublimation inkjet textile transfer paper and its manufacturing method

Abstract

To provide sublimation type inkjet printing transfer paper which is excellent in adhesion to a transferred body, has good ink acceptability and transferability, and causes less coating defects.SOLUTION: Sublimation type inkjet printing transfer paper has an ink-accepting layer on one surface of base paper, in which the ink-accepting layer contains a water-absorbing resin and an adhesive and does not contain a pigment, a content of the adhesive is 30-70% of the total mass of the water-absorbing resin and the adhesive, and a peeling strength from a polyester fabric of the sublimation type inkjet printing transfer paper after the sublimation type inkjet printing transfer paper and the polyester fabric are superposed to each other, and are hot pressed at 200°C for 30 seconds is 0.10-0.50 N / 100 mm.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a dye-sublimation ink-jet textile transfer paper and a method for producing the same. [Background technology]

[0002] Transfer printing methods include melt transfer printing, rubber print transfer printing, and dye sublimation transfer printing. However, dye sublimation transfer printing using inkjet recording is widely used because it can handle small lot sizes and produces clear prints at high speeds. Dye sublimation transfer printing has the advantage of being able to print clear, high-resolution designs that are difficult to achieve with other transfer methods, and its applications have expanded to include stretchable recipients, such as clothing and fabrics made primarily from synthetic fibers. To improve transfer efficiency for stretchable recipients with uneven surfaces, it was necessary to improve the adhesion between the transfer paper and the recipient.

[0003] Patent Document 1 describes a dye-sublimation inkjet textile transfer paper in which a second coating layer containing a specific ratio of polyolefin emulsion and hydroxylated cellulose is provided on a first coating layer containing inorganic particles and a binder. Patent Document 2 describes an inkjet recording sheet in which an ink-receiving layer containing a specific polymer compound is provided on a support to achieve high visual whiteness and good color reproducibility. Patent Document 3 describes a textile printing paper in which a glue layer containing a water-soluble polyester binder and a natural glue is provided on the surface of base paper. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-181805 [Patent Document 2] Japanese Patent Application Publication No. 11-058932 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-104917 [Patent Document 4] International Publication No. 1996 / 034769 Summary of the Invention [Problem to be solved by the invention]

[0005] The sublimation inkjet textile transfer paper described in Patent Document 1 has a configuration in which an adhesive second coating layer is laminated on a first coating layer containing a receptive layer paint. Therefore, if the coating weight of the second coating layer is increased to improve adhesion to the transferee, the function of the first coating layer is reduced, resulting in reduced ink receptivity and transferability. Furthermore, to improve the ink receptivity and transferability of the first coating layer, the coating weight of the second coating layer must be reduced, but this reduces adhesion to the transferee. In other words, with the configuration of the sublimation inkjet textile transfer paper described in Patent Document 1, it is difficult to improve all of the adhesion to the transferee, ink receptivity, and transferability. Furthermore, the sublimation inkjet textile transfer paper described in Patent Document 1 requires the first and second coating layers to be coated in separate processes, which complicates the manufacturing process and leaves room for improvement.

[0006] The inkjet recording sheet described in Patent Document 2 has physical properties required as paper that are significantly different from those of textile transfer paper, and it is difficult to convert it into the dye-sublimation inkjet textile transfer paper of the present invention.

[0007] The natural adhesive used in the printing paper described in Patent Document 3 has weak adhesive strength to the transfer target, making it difficult to use it in the dye-sublimation inkjet printing transfer paper of the present invention.

[0008] The dye diffusion thermal transfer paper described in Patent Document 4 has a structure in which a second layer and a third layer containing a thermoplastic polymer are provided on a first layer such as a nonwoven fabric sheet, and the manufacturing process is complicated, just like Patent Document 1. Furthermore, the thermal transfer paper described in Patent Document 4 differs in the transfer method used.

[0009] An object of the present invention is to provide a dye-sublimation ink-jet textile transfer paper that has excellent adhesion to a receiving material, good ink receptivity and transferability, and few coating defects. [Means for solving the problem]

[0010] The dye-sublimation inkjet textile transfer paper according to the present invention has an ink-receiving layer on one side of a base paper, the ink-receiving layer containing a water-absorbent resin and an adhesive, but not containing a pigment, and the content of the adhesive is 30 to 70% of the total mass of the water-absorbent resin and the adhesive; The adhesive is polyvinyl alcohol with a saponification degree of 65% or more but less than 80%, and the coating weight of the ink receiving layer after drying is 3 to 11 g / m 2 is It is something.

[0011] The method for producing a dye-sublimation inkjet textile transfer paper according to the present invention involves coating one side of a base paper with an ink-receiving layer paint containing a water-absorbing resin and an adhesive, the ink-receiving layer paint containing a water-absorbing resin and an adhesive but not containing a pigment, and the adhesive having a degree of saponification of Over 65% less than 80% polyvinyl alcohol; The coating weight of the ink receiving layer after drying is 3 to 11 g / m 2 and The content of the adhesive is 30 to 70% of the total mass of the water-absorbent resin and the adhesive. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a dye-sublimation ink-jet textile transfer paper that has excellent adhesion to a receiving material, good ink receptivity and transferability, and few coating defects. DETAILED DESCRIPTION OF THE INVENTION

[0013] The dye-sublimation ink-jet textile transfer paper according to the present invention has an ink-receiving layer formed on one side of a base paper. The base paper and the ink-receiving layer will be described in detail below.

[0014] (Base paper: raw pulp) As the raw material pulp constituting the base paper, for example, virgin pulp, recycled pulp, a combination of these pulps, etc. can be used.

[0015] Examples of virgin pulp that can be used include chemical pulps such as bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), unbleached hardwood kraft pulp (LUKP), unbleached softwood kraft pulp (NUKP), semi-bleached hardwood kraft pulp (LSBKP), semi-bleached softwood kraft pulp (NSBKP), hardwood sulfite pulp, and softwood sulfite pulp; and mechanical pulps (MP) such as stone ground pulp (SGP), pressed stone ground pulp (TGP), chemi-ground pulp (CGP), groundwood pulp (GP), and thermomechanical pulp (TMP), either alone or in combination.

[0016] Examples of waste paper pulp that can be used include disintegrated waste paper pulp, disintegrated and deinked waste paper pulp (DIP), and disintegrated, deinked, and bleached waste paper pulp, which are produced from brown waste paper, kraft envelope waste paper, magazine waste paper, newspaper waste paper, flyer waste paper, office waste paper, corrugated cardboard waste paper, white waste paper, Kent waste paper, imitation waste paper, and land tax waste paper, and these can be used alone or in combination.

[0017] (Base paper: additives) Additives may be added to the base paper as required.

[0018] Examples of additives that can be used include fillers, sizing agents, paper quality improvers, coagulants, defoamers, fluorescent whitening agents, aluminum sulfate, retention aids, drainage improvers, dry strength agents, wet strength agents, coloring dyes, coloring pigments, and water-resistant agents, which can be used alone or in combination.

[0019] (Base paper: Undercoat layer) If necessary, the base paper may be provided with an undercoat layer containing a water-soluble polymer as a main component.

[0020] Examples of water-soluble polymers that can be used include natural polymers. Examples of natural polymers include enzymatically decomposed starches, oxidized starches, hydroxyethylated starches, cationized starches, urea-phosphated starches, modified oxidized starches, etc., which are obtained by modifying raw starches such as corn, wheat, tapioca, and potato starches using various methods, as well as carboxymethyl cellulose (hereinafter also referred to as "CMC") and carboxyethyl cellulose (CEC), which can be used alone or in combination. The undercoat layer can also contain additives such as sizing agents, water-resistant agents, coloring dyes, coloring pigments, antifoaming agents, and fluorescent brighteners.

[0021] (Base paper: EST size) The base paper used should have an EST sizing time (the time required for the ultrasonic transmission intensity of the base paper's initial water absorption characteristics to reach 100%, as measured using a surface sizing tester (EST12, manufactured by Emtec) of 0.01 to 3.00 seconds. Base paper with an EST sizing time of 0.50 to 2.00 seconds is preferred, with 0.80 to 1.80 seconds being even more preferred. The EST sizing time measured using a surface sizing tester is a parameter that indicates the permeability of the ink-receiving layer coating into the base paper immediately after application. If the EST sizing time is less than 0.01 seconds, the ink-receiving layer coating may penetrate excessively into the base paper, resulting in fine defects in the ink-receiving layer and a slight decrease in image reproducibility. On the other hand, if the EST sizing time is more than 3.00 seconds, the ink-receiving layer coating may not penetrate the base paper well, resulting in poor adhesion between the ink-receiving layer and the base paper, which may result in a slight decrease in image reproducibility. Therefore, to improve image reproducibility, it is preferable to use a base paper with an EST sizing degree in the range of 0.01 to 3.00 seconds. The EST sizing degree can be adjusted, for example, by combining the type and amount of additives such as sizing agents in the base paper, the coating weight of the undercoat layer, and the type and amount of additives.

[0022] (under layer) In the dye-sublimation inkjet textile transfer paper, an underlayer containing carboxymethyl cellulose or the like may be formed between the dye-sublimation textile ink receiving layer and the base paper. The formation of the underlayer improves the compatibility of the wet coating material immediately after application of the mixed coating material, thereby making it easier to obtain a continuous coating film without pinholes with a smaller coating amount.

[0023] In addition to CMC, the under layer coating material for forming the under layer may contain components such as starch derivatives such as starch, oxidized starch, cationized starch, etherified starch, and starch phosphate; cellulose derivatives such as hydroxymethyl cellulose, hydroxyethyl cellulose, and cellulose sulfate; polyvinyl alcohol (hereinafter also referred to as "PVA") with various degrees of saponification and various PVA derivatives such as its silanol-modified, carboxylated, and cationized products; water-soluble natural polymer compounds such as casein, gelatin, modified gelatin, and soy protein; and water-soluble synthetic polymer compounds such as polyvinylpyrrolidone, sodium polyacrylate, styrene-maleic anhydride copolymer sodium salt, and polystyrene sodium sulfonate. There are no particular limitations on the components used, as long as the effects of providing the under layer are not impaired.

[0024] The underlayer paint may be the same paint as the ink-receiving layer paint. In this case, a smaller coating amount than that of a single coating of the ink-receiving layer paint can be used to sufficiently prevent coating defects, resulting in excellent coatability.

[0025] When forming an underlayer, the coating amount of the underlayer paint (after drying) is 3.0 g / m 2 Below The coating amount of the undercoat paint (after drying) is 3.0 g / m 2 When it exceeds this value, the air permeability becomes high. If the temperature becomes too high, blisters will occur during textile transfer, and the reproducibility of the transferred image will decrease at the locations where blisters occur.

[0026] (ink receiving layer) The ink-receiving layer contains a water-absorbent resin and an adhesive. However, the ink-receiving layer according to this embodiment does not contain a pigment. Because the ink-receiving layer does not contain a pigment, the adhesive does not bond the pigments together, improving adhesion between the textile transfer paper and the recipient. Furthermore, because the ink is adsorbed and held by the pigment during transfer, there is a possibility that the transfer density onto the fabric may decrease. Here, the pigment refers to a coating pigment used in general pigment-coated paper to improve ink receptivity, oil absorption, water resistance, etc. Examples of such pigments include heavy calcium carbonate, light calcium carbonate, kaolin, synthetic silica, talc, aluminum hydroxide, satin white, and titanium dioxide.

[0027] (Water absorbent resin) The water-absorbent resin functions to capture and absorb dye-sublimation printing ink and also functions as a binder. One or more of carboxymethylcellulose sodium salt (CMC), hydroxylated cellulose, and polyvinyl alcohol (PVA) can be used as the water-absorbent resin. Examples of hydroxylated cellulose include hydroxymethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose. Other water-soluble polymers that can be used in combination include starch derivatives such as oxidized starch, cationized starch, etherified starch, and phosphated starch; cellulose derivatives such as cellulose sulfate and their silanol-modified and carboxylated derivatives; water-soluble natural polymers such as casein, gelatin, modified gelatin, and soy protein; and water-soluble synthetic polymers such as polyvinylpyrrolidone, sodium polyacrylate, styrene-maleic anhydride copolymer sodium salt, and sodium polystyrene sulfonate. From the viewpoint of the ink receptivity required for inkjet textile transfer paper, carboxymethylcellulose or polyvinyl alcohol is preferred, and carboxymethylcellulose is more preferred.

[0028] The polyvinyl alcohol used as the water-absorbing resin may be any compound different from the polyvinyl alcohol used as the adhesive described below, and examples thereof include fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol with a degree of saponification of 80% or more, polyvinyl alcohol having a different degree of polymerization or molecular weight from the polyvinyl alcohol used as the adhesive, and polyvinyl alcohol copolymerized with a monomer other than vinyl acetate (polyvinyl alcohol having structural units other than structural units derived from vinyl acetate).

[0029] The content of the water-absorbing resin in the ink-receiving layer is preferably 30 to 70% of the total mass of the water-absorbing resin and the adhesive. If the content of the water-absorbing resin is less than 30% of the total mass of the water-absorbing resin and the adhesive, the ink receptivity may be insufficient, and if it exceeds 70%, the adhesiveness may be insufficient. That is, by having the content of the absorbent resin be 30 to 70% of the total mass of the water-absorbing resin and the adhesive, it is possible to achieve both the ink receptivity required for inkjet textile transfer paper and the adhesiveness required to prevent transfer misalignment. The content of the water-absorbing resin in the ink-receiving layer is more preferably 40 to 60%, and even more preferably 45 to 55%, of the total mass of the water-absorbing resin and the adhesive.

[0030] (adhesive) As the adhesive, polyvinyl alcohol (PVA) with a saponification degree of less than 80% can be suitably used. Vinyl acetate in the structural units of polyvinyl alcohol melts due to the heat during textile transfer, thereby exhibiting adhesiveness and plasticity to the substrate. When the ink-receiving layer contains polyvinyl alcohol with a saponification degree of less than 80%, adhesion between the dye-sublimation inkjet textile transfer paper and the substrate during textile transfer is improved, preventing misalignment of the transferred image onto the substrate (fabric).

[0031] Polyvinyl alcohol suitable as an adhesive is partially saponified polyvinyl alcohol obtained by partially hydrolyzing the acetate groups of polyvinyl acetate, and preferably has a degree of saponification of less than 80%. If the degree of saponification of polyvinyl alcohol used as an adhesive is 80% or higher, the adhesive strength between the transferee and the adhesive layer during textile transfer becomes too weak, preventing adhesion to the adherend during transfer and potentially causing ghosting (transfer misalignment), which is undesirable. The degree of saponification of polyvinyl alcohol is more preferably 79.0% or lower, even more preferably 75.0% or lower, and particularly preferably 74.5% or lower. The lower limit of the degree of saponification of polyvinyl alcohol can be 65.0%, more preferably 69.5% or higher, even more preferably 72.0% or higher, and particularly preferably 72.5% or higher. Here, when the degree of saponification of polyvinyl alcohol is less than 80%, the amount of vinyl acetate in the constituent units of polyvinyl alcohol increases, thereby enabling the polyvinyl alcohol to function as an adhesive. Polyvinyl alcohol also functions as an absorbent resin, which contributes to adjusting the ability to capture and absorb dye-sublimation ink. Examples of partially saponified polyvinyl alcohol that can be used include Kuraray Poval 5-74, L-8, and L-9-78 (manufactured by Kuraray Co., Ltd.).

[0032] The degree of polymerization of polyvinyl alcohol is preferably from 300 to 1,000. When the degree of polymerization of polyvinyl alcohol is within this range, it can suitably exhibit its function as an adhesive and its function of capturing and absorbing sublimation textile printing ink.

[0033] (Other additives) The ink-receiving layer may contain additives other than pigments, such as ink fixatives, sizing agents, coloring dyes, coloring pigments, defoamers, fluorescent brighteners, viscosity modifiers, lubricants, and surfactants. For example, the content of these additives is preferably 10% or less of the ink-receiving layer. From the viewpoint of reducing coating defects and improving stable operability, it is preferable to contain a surfactant.

[0034] (surfactant) When preparing the ink-receiving layer coating, mixing the adhesive and absorbent resin can cause the adhesive and absorbent resin to aggregate. If the ink-receiving layer coating contains aggregates, the screen (filter) of the coating device for the ink-receiving layer coating can become clogged, making stable production of dye-sublimation inkjet textile transfer paper difficult. Furthermore, if the ink-receiving layer coating contains aggregates, it can cause uneven coating of the ink-receiving layer coating and defects such as streaks and scratches in the ink-receiving layer after drying. Reducing the amount of adhesive reduces aggregation, but it also reduces the adhesion of the dye-sublimation inkjet textile transfer paper.

[0035] Therefore, it is preferable to blend a surfactant into the ink receiving layer (ink receiving layer coating material) according to this embodiment. As the surfactant, a compound with an HLB (Hydrophilic-Lipophilic Balance) value of 10 to 20 can be suitably used. By blending a surfactant with an HLB value of 10 to 20 into the ink receiving layer coating material, it is possible to suppress aggregation between the absorbent resin and the adhesive. The HLB value of the surfactant is preferably 13 to 20, and more preferably 16 to 20. By using a surfactant with a higher HLB value, the dispersibility of the adhesive in water can be improved. It is possible.

[0036] The type of surfactant is not particularly limited, and any of nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants can be used, but nonionic surfactants are preferred because they are effective in inhibiting aggregation between the water-soluble polymer and the adhesive made of polyolefin resin. Examples of nonionic surfactants include, but are not limited to, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene dialkyl ethers, polyoxyethylene fatty acid esters, glycerin fatty acid esters, and sucrose fatty acid esters.

[0037] The content of the surfactant in the ink-receiving layer is preferably 0.1 to 10% or less, more preferably 3 to 8% or less, in the ink-receiving layer. If the content of the surfactant in the ink-receiving layer is less than 0.1%, the effect of suppressing aggregation between the water-absorbent resin and the adhesive may be insufficient, and if it exceeds 0.1%, the adhesive strength during textile transfer may decrease, or bleeding of the ink may occur during printing by the inkjet method.

[0038] As the ink fixing agent, a polyamine epichlorohydrin compound can be preferably used from the viewpoint of high stability even in a highly viscous paint.

[0039] (Manufacturing method) The sublimation inkjet textile transfer paper according to this embodiment can be produced by preparing an ink-receiving layer coating material, applying the ink-receiving layer coating material to one side of a base paper, and drying the coating film.

[0040] The ink receiving layer coating material can be prepared by adding a dispersion of either the water-absorbing resin or the adhesive to a dispersion of the other of the water-absorbing resin or the adhesive in a mixing tank and stirring the mixture.

[0041] The method for coating the ink receiving layer is not particularly limited, but the layer can be coated using a coating machine such as a rod coater, a blade coater, or an air knife coater.

[0042] The coating amount of the ink receiving layer is 3.0 to 11.0 g / m per side from the viewpoint of suppressing ink strike-through and achieving good ink drying properties. 2 is preferred, and 5.0 to 9.0 g / m 2 More preferably, 6.0 to 8.0 g / m 2 is more preferred.

[0043] (Dye-sublimation inkjet textile transfer paper) The peel strength (adhesion strength) between the dye-sublimation inkjet textile transfer paper and the polyester fabric after the dye-sublimation inkjet textile transfer paper according to this embodiment is superimposed on a polyester fabric and heat-pressed at 200°C for 30 seconds is preferably 0.10 to 0.50 N / 100 mm. Adhesion strength within this range maintains close contact between the dye-sublimation inkjet textile transfer paper and the recipient during textile transfer, preventing misalignment between the two, and also prevents transfer of the adhesive to the recipient when the dye-sublimation inkjet textile transfer paper is peeled off after textile transfer. Even within the above range, the peel strength between the dye-sublimation inkjet textile transfer paper and the polyester fabric after heat-pressing at 200°C for 30 seconds is more preferably 0.15 to 0.40 N / 100 mm, and even more preferably 0.20 to 0.30 N / 100 mm.

[0044] (Backcoat layer) A backcoat layer may be provided on the other side of the base paper of the dye-sublimation inkjet textile transfer paper according to this embodiment, i.e., on the side opposite to the side on which the ink-receiving layer is formed. The backcoat layer prevents sublimation gas from escaping to the paper surface during textile transfer. It also adjusts the moisture difference between the front and back sides, further reducing curl height.

[0045] The backcoat layer preferably contains inorganic particles of delaminated kaolin having a median diameter D50 in the range of 1.50 to 3.00 μm and an aspect ratio of more than 20. The particle diameter (median diameter d50) of the inorganic particles shown here is measured using a laser diffraction / scattering particle size distribution analyzer (product name: MT3300, manufactured by Microtrac-Bell Corporation).

[0046] Other inorganic particles include kaolin, silica particles, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, magnesium hydroxide, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, Inorganic pigments such as magnesium silicate, alumina, colloidal alumina, alumina hydrate (e.g., pseudoboehmite), aluminum hydroxide, lithopone, zeolite, hydrated halloysite, etc. may be contained. These may be used alone or in combination of two or more.

[0047] The backcoat layer preferably contains tapioca starch and SB latex as binders, and further preferably contains polyethylene glycol (hereinafter also referred to as PEG).

[0048] (Air permeability) The air permeability of the dye sublimation inkjet textile transfer paper according to this embodiment is 100 to 10,000 The air permeability is preferably in the range of 500 to 1,500 seconds, and more preferably in the range of 500 to 1,500 seconds. 8117 (2009). By keeping the air permeability value within this range, the sublimated ink can be transferred well from the ink receiving layer to the transfer target, and the sublimated ink can be prevented from penetrating to the back side of the base paper. If the air permeability is less than 100 seconds, the sublimated ink will penetrate to the back side of the paper, which is undesirable as it will stain the heat roll or heat plate used for transfer. On the other hand, if the air permeability exceeds 10,000 seconds, In this case, the moisture in the ink receiving layer does not penetrate into the base paper, resulting in poor drying properties, and the moisture in the ink receiving layer does not escape during thermal transfer, which may cause blisters or the like, which is undesirable.

[0049] As explained above, the dye-sublimation inkjet textile transfer paper according to this embodiment uses polyvinyl alcohol with a saponification degree of less than 80% as the adhesive in the ink-receiving layer, and therefore has excellent adhesiveness during textile transfer, and can prevent transfer misalignment of the image even when the recipient is a stretchy cloth material. Furthermore, because the dye-sublimation inkjet textile transfer paper according to this embodiment has a configuration in which one ink-receiving layer is provided on one side of the base paper, it can improve ink receptivity and transferability compared to a configuration in which a layer for imparting adhesiveness is laminated on the surface of an ink-receiving layer, and it can also reduce the number of steps in manufacturing and improve production efficiency. [Example]

[0050] Below, specific examples of the dye-sublimation inkjet textile transfer paper according to the present invention will be described. However, the present invention is not limited to these examples. In addition, parts by mass, % by mass, and % shown in the examples indicate values ​​of dry solids or substantial components. Furthermore, the coating amount indicates values ​​of dry solids.

[0051] <Base paper manufacturing example> To a blend of 80% by mass of LBKP and 20% by mass of NBKP, heavy calcium carbonate and talc were added as fillers so that the ash content was 8.0%, and 0.8% by mass of cationic starch, 0.10% by mass of alkyl ketene dimer (internal sizing agent), and 0.3% by mass of anion-modified polyacrylamide were added as additives relative to 100% by mass of the total kraft pulp to prepare a paper stock. This paper stock was made on a paper machine, and oxidized starch was applied to the surface at 1.0 g / m on one side. 2 The resulting base paper was coated and dried, and the time required for the ultrasonic transmission intensity of the initial water absorption properties to reach 100% (EST sizing degree) measured using a surface sizing degree tester (EST12, manufactured by Emtec) was 1.50 seconds.

[0052] The following materials were used as components of the ink-receiving layer coating. (Water-soluble polymer) Carboxymethyl cellulose: FINFIX (manufactured by Sansho Co., Ltd.) Hydroxylated cellulose: SANHEC (manufactured by Sansho Co., Ltd.) Polyvinyl alcohol 1: Fully saponified polyvinyl alcohol (saponification degree: 98.0-99.0%) (adhesive) Polyvinyl alcohol 2: Partially saponified polyvinyl alcohol (saponification degree: 72.5-74.5%) Polyvinyl alcohol 3: Partially saponified polyvinyl alcohol (saponification degree: 69.5-72.5%) Polyvinyl alcohol 4: Partially saponified polyvinyl alcohol (saponification degree: 76.5-79.0%) Polyvinyl alcohol 5: Partially saponified polyvinyl alcohol (saponification degree: 87.0-89.0%) Polyolefin emulsion: Ethylene acrylic acid copolymer emulsion

[0053] (Examples 1 to 9, Comparative Examples 1 to 4, 6 and 7) An ink-receiving layer coating was prepared by adding a water-absorbing resin to an adhesive dispersed in water in the blending ratio shown in Table 1. The units of content (parts) shown in Table 1 are mass % when the total mass of the water-absorbing resin and adhesive is 100%, and all values ​​are solid content equivalents. The ink-receiving layer coating was applied to one side of the base paper obtained in the above manufacturing example using a rod coater and dried to form an ink-receiving layer. The coating amount of the ink-receiving layer coating (after drying) was as shown in Table 1.

[0054] [Table 1]

[0055] (Comparative Example 5) The ink-receiving layer coating was prepared by adding a water-absorbing resin to the adhesive (polyolefin emulsion) dispersed in water in the proportions shown in Table 1. An attempt was made to apply the ink-receiving layer coating to one side of the base paper using a rod coater, but a large amount of aggregates was generated and coating was not possible.

[0056] (Comparative Example 8) The adhesive dissolved in water was applied to one side of the base paper using a rod coater and then dried to form an ink-receiving layer. The coating amount of the adhesive (heat seal layer) (after drying) was as shown in Table 1.

[0057] The resulting dye-sublimation ink-jet textile transfer paper was evaluated by the following methods.

[0058] (1) Bleeding Using an inkjet printer (Seiko Epson Corporation, SC-F9350) and dye-sublimation textile printing inks (Seiko Epson Corporation, SC5HDK100P (black), SC5C100P (cyan), SC5M100p (magenta), and SC5Y100P (yellow)), a model image was printed on dye-sublimation inkjet textile transfer paper at 720 dpi x 720 dpi. The printed surface of the dye-sublimation inkjet textile transfer paper was visually observed, and the presence or absence of bleeding was evaluated according to the following criteria. ◎: No bleeding. ○: Slight bleeding is observed. △: Bleeding is observed, but it is not a problem in practical use. ×: Visible bleeding is observed.

[0059] (2)Drying property Using an inkjet printer (Seiko Epson Corporation, SC-F9350) and dye-sublimation inks (Seiko Epson Corporation, SC5HDK100P (black), SC5C100P (cyan), SC5M100P (magenta), SC5Y100P (yellow)), dye-sublimation inkjet transfer paper was printed at 720 dpi x 720 dpi with 100% black. A solid print was performed. One minute after printing, the printed surface was rubbed with tissue paper, and when it was wiped off, the presence or absence of spreading of the ink on the paper surface was visually confirmed and evaluated according to the following evaluation criteria. ⊚: Dries very quickly and the ink does not spread at all on the paper surface after wiping. ◯: Drying is slightly slow, and slight spreading of the ink is observed on the paper surface after wiping. Δ: Drying is slightly slow, and the ink spreads on the paper surface after wiping, but this is not a problem in practical use. ×: Drying is slow, and ink spreads on the paper surface after wiping.

[0060] (3) bleed-through The four colors CMYK were solid printed onto dye-sublimation inkjet textile transfer paper using an inkjet printer, then the paper was placed on top of polyester fabric and heat-pressed at 200°C for 90 seconds using a flatbed transfer machine to transfer the printed image to the polyester fabric. Plain paper was placed between the dye-sublimation inkjet textile transfer paper and the heat plate. After transfer, the presence or absence of ink adhesion to the interposed plain paper was visually confirmed and evaluated based on the following criteria. ⊚: No ink adhesion to the interposed plain paper was observed. ◯: Slight adhesion of ink to the interposed plain paper is observed. △: Adhesion of ink to the interposed plain paper was observed, but the amount of adhesion was not a problem in practical use. x: Adhesion of ink to the interposed plain paper was noticeable, and the amount of ink adhering was problematic in practical use.

[0061] (4) Concentration The CMYK color density of the polyester fabric onto which the image was transferred in the above evaluation item (3) was measured using a densitometer (FD-5, manufactured by Konica Minolta Japan, Inc.) and evaluated according to the following evaluation criteria. ◎: High transfer density to fabric material. ○: The transfer density to the fabric material is lower than that of the "Evaluation ◎" △: The transfer density to the fabric material is lower than that of the "Evaluation ◯" group, but is not a problem in practical use. ×: The transfer density onto the fabric material is low and is of a level that is problematic for practical use.

[0062] (5) Ghost The polyester fabric onto which the image was transferred in the above evaluation item (3) was visually observed, and the presence or absence of transfer misalignment (ghost) was evaluated according to the following criteria. ◎: No transfer misalignment. ○: Slight transfer misalignment is observed. △: Slight transfer misalignment is observed, but it is not a problem in practical use. ×: Transfer misalignment is noticeable, and there is a problem in practical use.

[0063] (6) Layer peeling The polyester fabric to which the image was transferred in the above evaluation item (3) was visually observed, and the presence or absence of a layer (ink-receiving layer or adhesive layer) peeled from the base paper was evaluated according to the following criteria. ⊚: No layer remains peeled from the base paper. ◯: A small amount of the layer peeled off from the base paper remains. △: The layer peeled off from the base paper remains, but it is not a problem in practical use. ×: The layer that has peeled off from the base paper remains conspicuously, and is problematic for practical use.

[0064] (7) Heat seal strength (peel strength) Dye-sublimation inkjet textile transfer paper cut to a width of 100 mm and a flow direction of 150 mm was placed on a polyester fabric of the same size (product name: Suede, basis weight: 110 g / m 2 The dye-sublimation inkjet textile transfer paper was placed on top of a sheet of polyester fabric (0.22 mm thick, 75 denier x 150 denier mesh) and heat-pressed for 30 seconds using a flatbed transfer machine (model number: Monti Antonio Mod. 120-T, transfer pressure 0.7 MPa, transfer temperature 200°C, transfer speed 0.6 m / min). The dye-sublimation inkjet textile transfer paper was left sealed to the polyester fabric for 5 minutes, and then the heat-seal strength was measured using a tensile tester (Toyo Seiki Seisakusho: Strograph ES) by T-peeling at a tensile speed of 0.5 mm / min.

[0065] (8) Coating defects The ink receiving layer of the dye-sublimation ink-jet textile transfer paper was visually inspected for the presence or absence of coating defects such as streaks and scratches, and evaluated according to the following criteria. ⊚: No coating defects in the ink receiving layer. ◯: Slight coating defects are observed in the ink receiving layer, but are not noticeable. Δ: Coating defects are observed in the ink receiving layer, but are not a problem in practical use. ×: Coating defects are conspicuous in the ink receiving layer, and there is a problem in practical use.

[0066] The evaluation results of the dye-sublimation inkjet textile transfer papers according to Examples 1 to 9 and Comparative Examples 1 to 8 are shown in Table 2.

[0067] [Table 2]

[0068] The dye-sublimation inkjet textile transfer papers of Examples 1 to 9 exhibited minimal bleeding during printing with an inkjet printer, excellent drying properties, and good ink receptivity (printability). Furthermore, the low ink strike-through during textile transfer, the high image transfer density onto the fabric, and the heat seal strength (peel strength) were all at or above practically acceptable levels. Ghosting during transfer and layer peeling were also suppressed to a practically acceptable level, demonstrating good transferability. Furthermore, there were few coating defects in the ink-receiving layer. Therefore, it was confirmed that the present invention can realize dye-sublimation inkjet textile transfer papers that have excellent adhesion to the substrate, good ink receptivity and transferability, and few coating defects.

[0069] In contrast, in Comparative Example 1, the amount of water-absorbent resin blended was small, resulting in insufficient transfer density onto the fabric material. Also, the amount of adhesive blended was large, resulting in many bubbles and noticeable coating defects.

[0070] In Comparative Example 2, the amount of adhesive compounded was small, so that the adhesion between the inkjet textile transfer paper and the fabric was not maintained sufficiently during textile transfer, and ghosting (misalignment of transfer) was noticeable.

[0071] In Comparative Examples 3 and 4, the heat seal strength (peel strength) was too weak (strength measurement was not possible), so the inkjet textile transfer paper and the fabric were not kept in close contact during textile transfer, and ghosting (transfer misalignment) was noticeable.

[0072] In Comparative Example 5, aggregates were generated and an ink-receiving layer could not be formed.

[0073] In Comparative Example 6, the coating amount of the ink-receiving layer was too small, resulting in weak heat seal strength (peel strength) and noticeable ghosting (misalignment of transfer).In addition, the coating amount of the ink-receiving layer was too small, resulting in noticeable ink strike-through during textile transfer and low transfer density onto the fabric material.

[0074] In Comparative Example 7, the coating weight of the ink-receiving layer was too high, which resulted in excessive heat seal strength (peel strength) between the ink-jet textile transfer paper and the fabric, resulting in layer peeling during peeling. In addition, the coating weight of the ink-receiving layer was too high, which also resulted in coating defects in the ink-receiving layer.

[0075] In Comparative Example 8, the ink receiving layer was made of only an adhesive, so the transfer density during textile transfer was low. Also, the heat seal strength was low, so ghosting was observed. [Industrial Applicability]

[0076] The present invention can be used as a dye-sublimation inkjet textile transfer paper for transferring a pattern to a fabric material (particularly suitable for stretchable materials), and since it has excellent adhesion to the substrate, it improves transfer density, reduces printing unevenness, and enables high-speed printing (good ink drying properties), making it suitable for use as a dye-sublimation inkjet textile transfer paper.

Claims

1. An ink-receiving layer is provided on one side of the base paper, the ink receiving layer contains a water-absorbing resin and an adhesive, but does not contain a pigment; the content of the pressure-sensitive adhesive is 30 to 70% of the total mass of the water-absorbent resin and the pressure-sensitive adhesive, the pressure-sensitive adhesive is polyvinyl alcohol having a saponification degree of 65% or more and less than 80%, The dye-sublimation inkjet textile transfer paper has a coating weight of 3 to 11 g / m 2 after drying of the ink-receiving layer.

2. The sublimation inkjet textile transfer paper according to claim 1, wherein the peel strength of the sublimation inkjet textile transfer paper from the polyester fabric after the sublimation inkjet textile transfer paper and the polyester fabric are overlapped and heat-pressed at 200°C for 30 seconds is 0.10 to 0.50 N / 100 mm.

3. 3. The dye-sublimation inkjet textile transfer paper according to claim 1, wherein the time required for the ultrasonic waves of the base paper to reach 100% of the initial water absorption property measured with a surface / sizing tester is 0.01 to 3.00 seconds.

4. A method for producing a dye-sublimation inkjet textile transfer paper, comprising coating one side of a base paper with an ink-receiving layer paint containing a water-absorbing resin and an adhesive, the ink receiving layer coating contains a water-absorbing resin and an adhesive, but does not contain a pigment; the pressure-sensitive adhesive is polyvinyl alcohol having a saponification degree of 65% or more and less than 80%, the coating weight of the ink receiving layer coating after drying is 3 to 11 g / m 2 ; a content of the adhesive being 30 to 70% of the total mass of the water-absorbing resin and the adhesive;

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