Method for manufacturing a transfer medium and transfer recording method

Abstract

A method for manufacturing a transfer medium with excellent high-temperature wash fastness for images transferred to fabric and a method for transferring and recording such images are provided. One embodiment of the invention involves a step of forming a mixed layer by adhering a white ink composition and a glue ink composition to the same area of ​​a substrate using an inkjet method within the same scan. The white ink composition contains white pigment, resin, and water, and the glue ink composition contains resin and water. The resins in the white ink composition and the glue ink composition are different types of resins.

Description

Technical Field

[0001] This invention relates to a method for manufacturing transfer media and a method for transferring and recording. Background Technology

[0002] A transfer recording method is known in which an image-bearing transfer medium is superimposed on a fabric such as cloth, and the image is transferred to the fabric by heating and pressurizing. This method is advantageous in that the image formed on the transfer medium can be formed into fine images with high on-demand capability; therefore, inkjet printing is preferred.

[0003] Furthermore, transfer media can be manufactured by forming an image on a substrate such as a release sheet and then coating the formed image with an adhesive liquid. For example, Patent Document 1 describes a method for manufacturing a transfer media in which ink is sprayed from a release sheet and adhesive liquid is applied using a wet-press wet method.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2024-054709

[0007] However, the high-temperature washing durability of images recorded by transferring images from previous transfer media to fabric is still insufficient. Summary of the Invention

[0008] One aspect of the method for manufacturing the transfer medium according to the present invention includes a step of forming a mixed layer by adhering a white ink composition and a glue ink composition to the same area of ​​a substrate using an inkjet method within the same scan. The white ink composition contains white pigment, resin, and water. The adhesive ink composition contains resin and water. The resin contained in the white ink composition and the resin contained in the adhesive ink composition are different types of resins.

[0009] One aspect of the transfer recording method involved in this invention includes: The process of manufacturing transfer media using one of the above-mentioned manufacturing methods; and The process of heat-transferring the mixed layer onto the fabric by heating the transfer medium with the surface of the mixed layer facing the fabric. Attached Figure Description

[0010] Figure 1 It is a 3D diagram of a serial printer.

[0011] Figure 2 This is a rough side view of a line printer.

[0012] Figure 3 This is a schematic diagram showing an example of the nozzle array configuration of an inkjet head.

[0013] Figure 4 This is a flowchart illustrating an example of a method for manufacturing a transfer medium according to this embodiment.

[0014] Figure 5 Table 1 shows examples of the composition of each ink composition.

[0015] Figure 6 Table 2 shows the manufacturing conditions of the transfer media involved in each example and the evaluation results.

[0016] Explanation of reference numerals in the attached figures

[0017] 20: Serial printer; 220: Transport unit; 230: Recording unit; 231: Inkjet head; 234: Carriage; 235: Carriage moving mechanism; 1: Line printer; 100: Feed unit; 200: Transport mechanism; 201: First transport roller; 202: Second transport roller; 300: Line head; 310: First line head; 320: Second line head; 330: Third line head; 340: Fourth line head; 350: Fifth line head; 500: Control unit; Y: Feed direction; F: Substrate; SD: Scanning direction; TD: Transport direction. Detailed Implementation

[0018] The embodiments of the present invention will now be described. The embodiments described below are examples of the present invention. The present invention is not limited to any of the embodiments described below, and includes various modifications implemented without changing the spirit of the invention. Furthermore, the configurations described below are not necessarily all essential to the present invention.

[0019] In this specification, the numerical range indicated by "~" refers to the range including the values ​​before and after "~" as the lower limit and upper limit.

[0020] In this specification, "(meth)acrylic acid" means acrylic acid or methacrylic acid, and "(meth)acrylate" means acrylate or methacrylate.

[0021] 1. Method for manufacturing transfer media

[0022] One embodiment of the present invention relates to a method for manufacturing a transfer medium, comprising a step of forming a mixed layer by adhering a white ink composition and a glue ink composition to the same area of ​​a substrate by inkjet printing within the same scan, wherein the white ink composition contains a white pigment, a resin and water, and the glue ink composition contains a resin and water, wherein the resin contained in the white ink composition and the resin contained in the glue ink composition are different types of resins.

[0023] Traditional transfer media involve layering ink and adhesive onto a substrate. When the ink and adhesive contain different resins, poor adhesion between the ink and adhesive layers leads to interfacial delamination. This delamination is particularly pronounced during high-temperature washing. Therefore, when the ink and adhesive contain different resins, there are technical challenges regarding high-temperature wash fastness.

[0024] In contrast, in the method for manufacturing the transfer medium according to this embodiment, a white ink composition and a glue ink composition are simultaneously adhered to a substrate to form a mixed layer of the white ink composition and the glue ink composition (adhesive liquid). Therefore, even when the resins contained in the white ink composition and the glue ink composition are different types of resins, the mixed layer of the white ink composition and the glue ink composition makes interfacial peeling difficult to occur, resulting in excellent high-temperature wash fastness.

[0025] The following describes each step of the method for manufacturing the transfer medium according to this embodiment.

[0026] 1.1 Hybrid Layer Formation Process

[0027] The method for manufacturing the transfer medium according to this embodiment includes a step (mixed layer formation step) in which a white ink composition and a glue ink composition are adhered to the same area of ​​a substrate by inkjet printing within the same scan.

[0028] 1.1.1 Attachment method

[0029] In the mixed layer formation step of the method for manufacturing transfer media according to this embodiment, a white ink composition and a glue ink composition are adhered to the same area of ​​a substrate by inkjet printing within the same scan. Thus, by simultaneously adhering the white ink composition and the glue ink composition to the substrate, a mixed layer of the white ink composition and the glue ink composition can be formed.

[0030] Here, "scanning" refers to moving the inkjet head relative to the recording area in the substrate. In this case, it can be performed by moving the inkjet head relative to the substrate, or by moving the substrate relative to the inkjet head. Alternatively, the relative positional relationship between the inkjet head and the substrate can be changed by moving both of them.

[0031] "Scan" is, for example, in Figure 1 In the serial inkjet recording apparatus 20 shown, the carriage 234 with the inkjet head 231 records while moving in the scanning direction SD, which intersects with the substrate transport direction TD.

[0032] Alternatively, the inkjet head can also be mounted on a carriage. In this case, the inkjet head moves as the carriage moves.

[0033] Furthermore, "scanning" is, for example, in... Figure 2 In the line-mode inkjet recording apparatus 1 shown, the substrate F records while its position is moved relative to the line head 300, which has a length equivalent to the width of the substrate F. In line-mode recording, the inkjet head (line head) remains stationary during recording and records in a single scan.

[0034] In addition, "length comparable to the width of the substrate" is not limited to the case where the width of the substrate is exactly the same as the length (width) of the print head. It can be a length that is comparable to or greater than the width of the substrate, or a length comparable to the width (recorded width) of the substrate from which ink, etc., is to be printed.

[0035] The number of times the same scan is performed on the same area of ​​the substrate during the hybrid layer formation process can be one or more.

[0036] When the same scan is performed on the same area of ​​the substrate multiple times, the inkjet head that ejects the white ink composition and the adhesive ink composition passes over the same area of ​​the substrate multiple times. The more scans, the more often the white ink composition and the adhesive ink composition can be applied to the desired area separately in multiple paths, resulting in a stronger hybrid layer and a tendency for more difficult interfacial peeling.

[0037] More specifically, for example in Figure 1 In the case where the length of a single transport of the substrate F in the transport direction TD is one-quarter of the length of the transport direction TD in the nozzle array arranged in the direction intersecting the scanning direction SD of the inkjet head, four scans are performed on the same part (same area) for a rectangular scanning area that is the length of a single transport direction TD in the transport direction TD and extends in the scanning direction SD.

[0038] When performing the same scan multiple times, from the viewpoint of superior adhesion to high-temperature washing, a value of 2 or higher is preferred, more preferably 3 or higher, further preferably 4 or higher, and particularly preferably 6 or higher. There is no upper limit, but from the viewpoint of superior productivity, a value of 24 or lower is preferred, more preferably 12 or lower, and further preferably 8 or lower.

[0039] The time difference between the adhesion of the white ink composition and the adhesive ink composition in the same area of ​​the substrate is preferably within 30 seconds, more preferably within 15 seconds, further preferably within 5 seconds, even more preferably within 1 second, particularly preferably within 0.5 seconds, and even more particularly preferably within 0.1 seconds. If this time difference is within the above range, a mixed layer can be formed better, and there is a tendency for the interface to be more difficult to peel off.

[0040] The preferred amount of white ink composition adhering to the substrate during the mixed layer formation process is 300 g / m². 2 The following is more preferably 250g / m 2 The following is a further preferred value: 200g / m 2 The following is a further preferred value: 150g / m 2 The following is particularly preferred: 100g / m 2 The following is a more particularly preferred option: 70g / m 2 The following is particularly preferred: 50g / m 2 the following.

[0041] Furthermore, there is no particular limitation on the lower limit of the amount of white ink composition adhering to the substrate during the mixed layer formation process, but 1 g / m² is preferred. 2 The above, more preferably 10g / m 2 The above is further preferred to be 20g / m 2 The above, especially preferred, is 30g / m 2 above.

[0042] The adhesion amount of the adhesive ink composition relative to the substrate in the mixed layer formation process is preferably 550 g / m². 2 The following is more preferably 400g / m 2 The following is a further preferred value: 250g / m 2 The following is a further preferred value: 150g / m 2 The following is particularly preferred: 100g / m 2 The following is a more particularly preferred option: 70g / m 2 The following is particularly preferred: 50g / m 2 the following.

[0043] Furthermore, there is no particular limitation on the lower limit of the amount of the adhesive ink composition adhering to the substrate in the mixed layer formation process, but 1 g / m² is preferred. 2The above, more preferably 10g / m 2 The above is further preferred to be 20g / m 2 The above, especially preferred, is 30g / m 2 above.

[0044] The combined adhesion amount of the white ink composition and the adhesive ink composition relative to the substrate in the mixed layer formation process is preferably 550 g / m². 2 The following is more preferably 300g / m 2 The following is a further preferred value: 250g / m 2 The following is more preferably 200g / m 2 The following is particularly preferred: 150g / m 2 The following is a more preferred value: 100g / m 2 the following.

[0045] Furthermore, there is no particular limitation on the lower limit of the total amount of white ink composition and adhesive ink composition adhering to the substrate in the mixed layer formation process, but it is preferably 5 g / m². 2 The above, more preferably 10g / m 2 The above is further preferred to be 30g / m 2 The above, especially preferred, is 50g / m 2 above.

[0046] The adhesion ratio of the adhesive ink composition to the white ink composition in the mixed layer forming process is preferably 0.01 to 100, more preferably 0.1 to 70, further preferably 0.1 to 50, even more preferably 0.1 to 10, particularly preferably 0.1 to 5, even more preferably 0.5 to 3, especially preferably 0.7 to 1.5, and even more preferably 0.8 to 1.2.

[0047] 1.1.2 White ink composition

[0048] The white ink composition used in the method for manufacturing the transfer medium according to this embodiment is an inkjet ink composition containing white pigment, resin and water.

[0049] The following describes the components contained in the white ink composition.

[0050] 1.1.2.1 White pigment

[0051] The white ink composition contains a white pigment. Examples of white pigments include metal oxides, barium sulfate, and calcium carbonate. Furthermore, the white pigment can use particles with a hollow structure; known particles can be used as hollow-structured particles.

[0052] Furthermore, in this specification, the term "white" as used when referring to white ink compositions, white pigments, etc., does not refer to pure white, but to any area that can be visually recognized as white, including colors that are tinted or achromatic, or colors with a glossy finish. In addition, the names of inks and pigments include names of inks or pigments that are labeled as white, and their market names.

[0053] More quantitatively, "white" includes not only records such as those in CIELAB For a color of 100, it can also include For those with scores between 60 and 100, as well as The colors are defined as ±10. Additionally, colors other than "white" are set to "non-white".

[0054] Examples of white pigments include: 1. CI pigment white made of basic lead carbonate; 4. CI pigment white made of zinc oxide; 5. CI pigment white made of a mixture of zinc sulfide and barium sulfate; 6. CI pigment white made of titanium dioxide; 6. CI pigment white made of titanium dioxide containing other metal oxides; 7. CI pigment white made of zinc sulfide; 18. CI pigment white made of calcium carbonate; 19. CI pigment white made of clay; 20. CI pigment white made of mica titanium; 21. CI pigment white made of barium sulfate; 22. CI pigment white made of gypsum; 26. CI pigment white made of magnesium oxide / silicon dioxide; 27. CI pigment white made of silicon dioxide; 28. CI pigment white made of anhydrous calcium silicate, etc.

[0055] As a white pigment, in the above examples, titanium dioxide is preferred from the viewpoint of good whiteness and wash fastness. A single white pigment may be used, or two or more may be used in combination.

[0056] The average particle size of the white pigment is preferably 100 nm or more and 500 nm or less, more preferably 50 nm or more and 450 nm or less, and even more preferably 200 nm or more and 400 nm or less. By setting the average particle size of the white pigment within this range, there is a tendency to ensure the ejection stability from the inkjet head. In addition, there is a tendency to improve concealment. In addition, unless otherwise specified, "average particle size" in this specification refers to the particle size at a cumulative distribution of 50 vol%, i.e., the volumetric particle size distribution. The average particle size is measured by the dynamic light scattering method or the laser diffraction method described in JIS Z8825. Specifically, a particle size analyzer based on the dynamic light scattering method (e.g., "Microtrac UPA" manufactured by Nikkiso Co., Ltd.) can be used.

[0057] White pigments can also be dispersed using dispersants. Alternatively, white pigments can be oxidized or sulfonated using ozone, hypochlorous acid, fuming sulfuric acid, etc., to become self-dispersible and then dispersed for use.

[0058] Dispersants function to disperse pigments in inks. Dispersants can be water-soluble, but preferably not completely water-soluble. They can be considered to partially or completely bind to or adsorb onto the pigment, increasing the hydrophilicity of the pigment surface, thereby dispersing the pigment.

[0059] The dispersant is preferably a polymeric compound. Examples of such dispersants include poly(meth)acrylic acid, (meth)acrylic acid-acrylonitrile copolymer, (meth)acrylic acid-(meth)acrylate copolymer, vinyl acetate-(meth)acrylate copolymer, vinyl acetate-(meth)acrylic acid copolymer, vinylnaphthalene-(meth)acrylic acid copolymer, styrene-(meth)acrylic acid copolymer, styrene-(meth)acrylic acid-(meth)acrylate copolymer, styrene-α-methylstyrene-(meth)acrylic acid copolymer, styrene-α-methylstyrene-(meth)acrylic acid-(meth)acrylate copolymer, and acrylic resins and their salts.

[0060] In addition, examples of dispersants include maleic acid resins and their salts, such as styrene-maleic acid copolymers, styrene-maleic anhydride copolymers, vinyl naphthalene-maleic acid copolymers, and vinyl acetate-maleic ester copolymers; polyurethane resins and their salts, whether or not they have cross-linked structures; polyvinyl alcohols; and vinyl acetate-crotonic acid copolymers and their salts.

[0061] In addition to polymers of acrylic monomers as described above, acrylic resins can also be copolymers of acrylic monomers with other monomers. For example, vinyl acrylate resins copolymerized with vinyl monomers, which are other monomers, are also called acrylic resins. Furthermore, as in the styrene resins described above, resins that are copolymers of styrene monomers and acrylic monomers are also included in acrylic resins. Moreover, when referred to as acrylic resins, their salts or esters are also included.

[0062] Commercially available dispersants include, for example, X-200, X-1, X-205, X-220, X-228 (manufactured by Starlight PMC), Nopco Sparse (registered trademark) 6100, 6110 (manufactured by San Nopco Co., Ltd.), Joncryl 67, 586, 611, 678, 680, 682, 819 (manufactured by BASF), DISPERBYK-190 (manufactured by BYK Chemicals Japan Co., Ltd.), N-EA137, N-EA157, N-EA167, N-EA177, N-EA197D, N-EA207D, E-EN10 (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.), etc.

[0063] Commercially available acrylic dispersants include BYK-187, BYK-190, BYK-191, BYK-194N, BYK-199 (manufactured by BYK Chemical Co., Ltd.), Aron A-210, A6114, AS-1100, AS-1800, A-30SL, A-7250, and CL-2 (manufactured by Toa Synthetic Co., Ltd.).

[0064] Commercially available polyurethane dispersants include BYK-182, BYK-183, BYK-184, BYK-185 (manufactured by BYK Chemical Co., Ltd.), TEGO Disperse 710 (manufactured by Evonic Tego Chemi), and Borchi (registered trademark) Gen1350 (manufactured by OMG Borschers).

[0065] The content of the dispersant relative to 100% by mass of the white ink composition is preferably 0.1% by mass or more and 30% by mass or less, more preferably 0.5% by mass or more and 25% by mass or less, further preferably 1% by mass or more and 20% by mass or less, and particularly preferably 1.5% by mass or more and 15% by mass or less. A dispersant content of 0.1% by mass or more tends to ensure the dispersion stability of the white pigment. Furthermore, if the dispersant content is 30% by mass or less, it tends to suppress the viscosity of the white ink composition to a lower level. One type of dispersant may be used alone, or two or more may be used in combination.

[0066] Furthermore, the weight average molecular weight of the dispersant is preferably 500 or higher. Using such a dispersant tends to result in less odor and better dispersion stability of the pigment.

[0067] When the white pigment is dispersed by a dispersant, the ratio of white pigment to dispersant is preferably 10:1 to 1:10, more preferably 4:1 to 1:3.

[0068] The content of white pigment relative to the total amount of white ink composition is preferably 1 to 30% by mass, more preferably 2 to 25% by mass, even more preferably 4 to 20% by mass, particularly preferably 6 to 15% by mass, and even more particularly preferably 8 to 12% by mass. If the content of white pigment is within the above range, there is a tendency to obtain better color development (whiteness).

[0069] 1.1.2.2 Resin

[0070] The white ink composition contains a resin. The resin functions as a fixing resin, which improves the adhesion of the ink to a substrate. The resin is preferably in emulsion form (resin particles), but it can also be in powder form.

[0071] Examples of resins include polyurethane resins, polyester resins, acrylic resins, olefin resins, fluorene resins, rosin-modified resins, terpene resins, amide resins, epoxy resins, and vinyl chloride resins.

[0072] Polyurethane resin is a general term for resins containing urethane bonds. In addition to urethane bonds, polyurethane resins can include polyether-type polyurethane resins with ether bonds in the main chain, ester-type polyurethane resins with ester bonds in the main chain, and carbonate-type polyurethane resins with carbonate bonds in the main chain, etc.

[0073] Commercially available polyurethane resins can also be used, such as Super flex 460, 460s, 840, E-4000 (trade name, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.), Resamine D-1060, D-2020, D-4080, D-4200, D-6300, D-6455 (trade name, manufactured by Dai Nippon Seika Co., Ltd.), Takelac WS-5100, WS-6021, W-512-A-6, W-6110 (trade name, manufactured by Mitsui Chemicals Polyurethane Co., Ltd.), Sancure 2710 (trade name, manufactured by LUBRIZOL Co., Ltd.), and Hydran UA-150 (trade name, manufactured by Sanyo Chemical Co., Ltd.).

[0074] Polyester resins have structural units derived from polycarboxylic acids such as terephthalic acid, isophthalic acid, and phthalic acid, and structural units derived from polyols such as ethylene glycol, 1,2-propanediol, and 1,3-propanediol, and are obtained through a known condensation reaction of polycarboxylic acids and polyols.

[0075] Commercially available products can also be used as polyester resins. Commercially available polyester resins include, for example, Unitika's Elitel (registered trademark) KA-5034, KA-5071S, KA-1449, KA-0134, KA-3556, KA-6137, KZA-6034, KT-8803, KT-8701, KT-9204, KT-8904, KT-0507, KT-9511 (all trade names); Motoyo Chemical Industries' Plascoat (registered trademark) Z-221, Z-446, Z-561, Z-565, RZ-570, Z-592, Z-687, Z-690, Z-730, Z-760, Z-880, RZ-105, RZ-570, RZ-760 (all trade names); and Toyobo's Vylonal (registered trademark). MD-1200, MD-1500, MD-2000 (these are trade names), etc. They can be used individually or in combination.

[0076] Acrylic resin is a general term for polymers obtained by polymerizing at least one acrylic monomer, such as (meth)acrylic acid or (meth)acrylate. Examples include resins obtained from acrylic monomers and copolymers of acrylic monomers with other monomers. For example, copolymers of acrylic monomers and vinyl monomers, i.e., acrylic-vinyl resins, are examples. Furthermore, styrene can be used as a vinyl monomer. Acrylamide and acrylonitrile can also be used as acrylic monomers.

[0077] In resin emulsions made from acrylic resin, commercially available products can also be used, such as FK-854 (trade name, manufactured by Central Riko Industrial Co., Ltd.), Mowinyl 952B, 718A (trade name, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), Nipol LX852, LX874 (trade name, manufactured by Zeon Corporation of Japan).

[0078] Additionally, in this specification, acrylic resin may also be the styrene-acrylic resin described later. Furthermore, in this specification, the term (meth)acrylic acid refers to acrylic acid or methacrylic acid.

[0079] Examples of styrene-acrylic resins include copolymers obtained from styrene monomers and (meth)acrylic monomers, styrene-acrylic acid copolymers, styrene-methacrylic acid copolymers, styrene-methacrylic acid-acrylate copolymers, styrene-α-methylstyrene-acrylic acid copolymers, and styrene-α-methylstyrene-acrylic acid-acrylate copolymers. Styrene-acrylic resins can also be commercially available, such as Joncryl 62J, 7100, 390, 711, 511, 7001, 632, 741, 450, 840, 74J, HRC-1645J, 734, 852, 7600, 775, 537J, 1535, PDX-7630A, 352J, 352D, PDX-7145, 538J, 7640, 7641, 631, 790, 780, 7610 (trade name, manufactured by BASF), Mowinyl 966A, 975N (trade name, manufactured by Nippon Synthetic Chemicals Co., Ltd.), Vinyblan 2586 (manufactured by Nissin Chemical Co., Ltd.), etc.

[0080] Olefin resins are polymers containing olefins such as ethylene, propylene, and butene in their structural backbone. Well-known olefin resins can be appropriately selected and used. Commercially available olefin resins can be used, such as Arrowbase CB-1200 and CD-1200 (trade name, manufactured by Unitika Co., Ltd.).

[0081] Fluorene resins are a general term for resins with a fluorene backbone. Examples of fluorene resins include fluorene-based polyester resins, fluorene-based polyurethane resins, fluorene-based polyimide resins, fluorene-based polycarbonate resins, fluorene-based acrylic resins, and fluorene-based epoxy resins.

[0082] Rosin-modified resins are a general term for resins derived from rosin. Examples of rosin-modified resins include rosin-modified phenolic resins, maleic acid-modified rosin resins, and rosin esters.

[0083] Terpene resins are resins obtained by cationic polymerization of monomers with isoprene (C5H8) as the basic unit, such as α-pinene, β-pinene, and dipentene as the main components.

[0084] Amide resins are resins whose main chain is formed by the repetition of amide bonds. There are no particular limitations on amide resins, and examples include nylon 6, nylon 11, nylon 12, nylon 66, nylon 610, nylon 6T, nylon 6I, nylon 6T, nylon M5T, and nylon 612.

[0085] Epoxy resin refers to resin with reactive epoxy groups. Examples include bisphenol type epoxy resins such as bisphenol A and bisphenol F, phenolic varnish type epoxy resins such as phenolic varnish type and cresol varnish type, epoxy polyol type epoxy resins, polyurethane modified epoxy resins, chelate modified epoxy resins, and rubber modified epoxy resins.

[0086] There are no particular limitations on what constitutes a vinyl chloride resin. Examples of such resins include copolymers of vinyl chloride with one or more of the group consisting of vinyl acetate, vinylidene chloride, acrylic acid, maleic acid, and vinyl alcohol.

[0087] The resin can be used alone or in combination with two or more resins, but it is preferred to use one resin alone. The resin is more preferably selected from polyurethane resin, polyester resin, acrylic resin, olefin resin, fluorene resin, rosin-modified resin, terpene resin, amide resin, epoxy resin, and vinyl chloride resin.

[0088] The glass transition temperature (Tg) of the resin is preferably -80°C or higher and 50°C or lower, more preferably -60°C or higher and 40°C or lower, and even more preferably -50°C or higher and 25°C or lower. When the glass transition temperature (Tg) of the resin is within the above range, it tends to excellently balance fabric conformability (hand feel) and wash fastness. The glass transition temperature is measured, for example, using a differential scanning calorimeter "DSC7000" manufactured by Hitachi High Technology Scientific Co., Ltd., according to JIS K7121 (Method for Determination of Transition Temperature of Plastics).

[0089] In the method for manufacturing the transfer medium according to this embodiment, the resin contained in the white ink composition and the resin contained in the adhesive ink composition are different types of resins. When the resins contained in the white ink composition and the adhesive ink composition are different types of resins, the adhesion between the ink layer and the adhesive layer is poor, and interfacial peeling is prone to occur, especially when washing at high temperatures. In contrast, according to the method for manufacturing the transfer medium according to this embodiment, by forming a mixed layer of white ink composition and adhesive ink composition, excellent high-temperature wash fastness can be obtained.

[0090] Furthermore, "different types of resins" simply means that at least one of the white ink composition and the adhesive ink composition contains two or more types of resins, and at least one of the resins is a different type of resin. In a composition containing two or more resins, the content of at least one different resin relative to the total amount of resin in the composition is preferably 30% by mass or more, more preferably 50% by mass or more, further preferably 70% by mass or more, and particularly preferably 90% by mass or more.

[0091] Resin type refers to the variety of resins used. Examples of resin types include olefin resins (polyethylene (PE), polypropylene (PP), etc.), polystyrene (PS), vinyl chloride resin (PVC), ABS resin (ABS), AS resin (SAN), polyester resins (polyethylene terephthalate (PET), polybutylene terephthalate (PBT), unsaturated polyester (UP), etc.), acrylic resins, polyamide (PA), polycarbonate (PC), polyacetal (POM), polyphenylene ether (PPE), fluoropolymers, polyimide (PI), polyethersulfone (PES), polyetherimide (PEI), urea-formaldehyde resin (UF), melamine resin (MF), epoxy resin (EP), silicone resin (SI), polyurethane (PUR), fluorene resin, rosin-modified resin, terpene resin, etc.

[0092] Among these, resins selected from polyurethane resins, polyester resins, acrylic resins, olefin resins, fluorene resins, rosin-modified resins, terpene resins, amide resins, epoxy resins, and vinyl chloride resins are preferred as different types of resins. More preferably, resins selected from polyurethane resins, polyester resins, acrylic resins, and olefin resins are preferred. Even more preferably, resins selected from polyurethane resins and polyester resins are preferred. When the resins contained in the white ink composition and the resins contained in the adhesive ink composition are selected from such different types of resins, interfacial peeling is particularly prone to occur. In contrast, the method for manufacturing the transfer medium according to this embodiment tends to achieve excellent high-temperature wash fastness even when the selected resins are different.

[0093] When the resins contained in the white ink composition and the resins contained in the adhesive ink composition are different types of resins, it is more preferable that the resin contained in the white ink composition is polyurethane resin and the resin contained in the adhesive ink composition is polyester resin. Polyurethane resin has excellent elasticity, but its adhesion to fabric tends to deteriorate. Polyester resin has excellent adhesion to fabric, but its elasticity tends to deteriorate. Therefore, it is preferable that the white ink composition contains polyurethane resin and the adhesive ink composition contains polyester resin. However, conventionally, when the resins contained in the white ink composition and the adhesive ink composition are different types of resins, interfacial peeling is prone to occur, resulting in technical problems regarding high-temperature wash fastness. In contrast, according to the method for manufacturing the transfer medium according to this embodiment, excellent high-temperature wash fastness can be obtained, and by containing polyurethane resin in the white ink composition, a good hand feel can be achieved, and by containing polyester resin in the adhesive ink composition, good transferability can be achieved.

[0094] The resin content relative to the total amount of the white ink composition is preferably 1 to 30% by mass, more preferably 2 to 25% by mass, even more preferably 4 to 20% by mass, particularly preferably 6 to 15% by mass, and even more particularly preferably 8 to 12% by mass. If the resin content is within the above range, there is a tendency to obtain better wash fastness.

[0095] 1.1.2.3 Water

[0096] The white ink composition contains water. Examples of water include purified water (such as ion-exchanged water, ultrafiltered water, reverse osmosis water, and distilled water) and ultrapure water, which have reduced ionic impurities. Furthermore, if water that has been sterilized by ultraviolet irradiation or the addition of hydrogen peroxide is used, the growth of bacteria and fungi can be inhibited during long-term storage of the white ink composition.

[0097] The water content relative to the total amount of the white ink composition is preferably 10% by mass or more, more preferably 30% by mass or more, more preferably 40% by mass or more, and particularly preferably 50% by mass or more. There is no particular upper limit to the water content; for example, it is preferably 90% by mass or less relative to the total amount of the white ink composition, more preferably 80% by mass or less, and more preferably 70% by mass or less.

[0098] 1.1.2.4 Organic solvents

[0099] White ink compositions may also contain organic solvents. Examples of organic solvents include esters, alkylene glycol ethers, cyclic esters, amides, alcohols, and polyols.

[0100] Examples of esters include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, methoxybutyl acetate, and other diol monoacetates; ethylene glycol diacetate, diethylene glycol diacetate, propylene glycol diacetate, dipropylene glycol diacetate, ethylene glycol acetate propionate, ethylene glycol acetate butyrate, diethylene glycol acetate butyrate, diethylene glycol acetate propionate, diethylene glycol acetate butyrate, dipropylene glycol acetate propionate, propylene glycol acetate butyrate, dipropylene glycol acetate butyrate, dipropylene glycol acetate propionate, and other diol diesters.

[0101] As alkylene glycol ethers, any mono- or di-ether of an alkylene glycol is acceptable, with alkyl ethers being preferred. Specific examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, tetraethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, and tripropylene glycol monobutyl ether, etc. Alkyl glycol monoalkyl ethers; and alkylene glycol dialkyl ethers such as ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, diethylene glycol methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dibutyl ether, triethylene glycol methyl butyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, tripropylene glycol dimethyl ether, etc.

[0102] Examples of cyclic esters include β-propiolactone, γ-butyrolactone, δ-valerolactone, ε-caprolactone, β-butyrolactone, β-valerolactone, γ-valerolactone, β-caprolactone, γ-caprolactone, δ-caprolactone, β-heptanelactone, γ-heptanelactone, δ-heptanelactone, ε-heptanelactone, γ-octanelactone, δ-octanelactone, ε-octanelactone, δ-nonanolactone, ε-nonanolactone, and ε-decanolactone, as well as compounds in which the hydrogen atom of the methylene group adjacent to these carbonyl groups is replaced by an alkyl group having 1 to 4 carbon atoms.

[0103] Examples of amides include cyclic amides and non-cyclic amides. Examples of non-cyclic amides include alkoxyalkyl amides.

[0104] Examples of cyclic amides include lactams. Examples of lactams include pyrrolidones such as 2-pyrrolidone, 1-methyl-2-pyrrolidone, 1-ethyl-2-pyrrolidone, 1-propyl-2-pyrrolidone, and 1-butyl-2-pyrrolidone.

[0105] Examples of alkoxyalkylamides include 3-methoxy-N,N-dimethylpropionamide, 3-methoxy-N,N-diethylpropionamide, 3-methoxy-N,N-methylethylpropionamide, 3-ethoxy-N,N-dimethylpropionamide, 3-ethoxy-N,N-diethylpropionamide, 3-ethoxy-N,N-methylethylpropionamide, 3-n-butoxy-N,N-dimethylpropionamide, 3-n-butoxy-N,N-diethylpropionamide, 3-n-butoxy-N,N-methylethylpropionamide, 3-n-butoxy-N,N-methylethylpropionamide, 3- - n-propoxy-N,N-dimethylpropionamide, 3-n-propoxy-N,N-diethylpropionamide, 3-n-propoxy-N,N-methylethylpropionamide, 3-isopropoxy-N,N-dimethylpropionamide, 3-isopropoxy-N,N-diethylpropionamide, 3-isopropoxy-N,N-methylethylpropionamide, 3-tert-butoxy-N,N-dimethylpropionamide, 3-tert-butoxy-N,N-diethylpropionamide, N,N-dimethylisobutyric acid amide, etc.

[0106] Examples of alcohols include compounds in which one hydrogen atom of an alkane is replaced by a hydroxyl group. Preferably, the alkane has 10 or fewer carbon atoms, more preferably 6 or fewer, and even more preferably 3 or fewer. The alkane has 1 or more carbon atoms, preferably 2 or more. The alkane can be straight-chain or branched. Examples of alcohols include methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert-butanol, isobutanol, n-pentanol, 2-pentanol, 3-pentanol, as well as tert-pentanol, 2-phenoxyethanol, benzyl alcohol, and phenoxypropanol.

[0107] Polyols are polyols that have two or more hydroxyl groups in their molecules. Polyols can be classified into, for example, alkyldiols and polyols.

[0108] Alkanediols include, for example, compounds in which alkanes are substituted with two hydroxyl groups. Examples of alkanediols include the general term for compounds in which hydroxyl groups are substituted at the 1 and 2 positions of alkane, namely 1,2-alkanediols and other alkanediols besides 1,2-alkanediols.

[0109] Examples of 1,2-alkanediols include ethylene glycol, 1,2-propanediol (propylene glycol), 1,2-butanediol (1,2BD), 1,2-pentanediol (1,2PD), 1,2-hexanediol (1,2HD), 1,2-heptanediol, 1,2-octanediol, 1,2-nonanediol, 1,2-decanediol, 3-methyl-1,2-butanediol, 3-methyl-1,2-pentanediol, 4-methyl-1,2-pentanediol, and 3,4-dimethyl-1,2- Pentylene glycol, 3-ethyl-1,2-pentanediol, 4-ethyl-1,2-pentanediol, 3-methyl-1,2-hexanediol, 4-methyl-1,2-hexanediol, 5-methyl-1,2-hexanediol, 3,4-dimethyl-1,2-hexanediol, 3,5-dimethyl-1,2-hexanediol, 4,5-dimethyl-1,2-hexanediol, 3-ethyl-1,2-hexanediol, 4-ethyl-1,2-hexanediol, 3-ethyl-4-methyl-1,2-hexanediol, etc.

[0110] Other examples of alkanediols include 1,3-propanediol, 1,3-butanediol (also known as 1,3-butanediol), 1,4-butanediol, 2,3-butanediol, 1,5-pentanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 3-methyl-1,3-butanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 2-methyl-1,3-pentanediol, 3-methyl-1,5-pentanediol, 2-methylpentane-2,4-diol, 1,6-hexanediol, 2-ethyl-2-methyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, etc.

[0111] Examples of polyols include polymers of alkyldiols formed by the intermolecular polymerization of two or more molecules between hydroxyl groups, and compounds having three or more hydroxyl groups.

[0112] Examples of alkyl glycols are polymers formed by the intermolecular polymerization of two or more molecules between hydroxyl groups, such as dialkylene glycols like diethylene glycol and dipropylene glycol, and trialkylene glycols like triethylene glycol and tripropylene glycol.

[0113] Compounds having three or more hydroxyl groups are compounds with three or more hydroxyl groups as their backbone, which are compounds with an alkane or polyether structure. Examples of compounds having three or more hydroxyl groups include glycerol, trimethylolethane, hydroxymethylpropane, 1,2,5-hexanetriol, 1,2,6-hexanetriol, pentaerythritol, and polyoxypropylene triol.

[0114] Organic solvents can be used alone or in combination with two or more.

[0115] The organic solvent, relative to the total amount of the white ink composition, preferably contains 3.0% by mass or more, more preferably 5.0% by mass or more, and even more preferably 8.0% by mass or more of an organic solvent with a standard boiling point of 250°C or higher. There is no particular upper limit to the content, but it is preferably 20% by mass or less relative to the total amount of the white ink composition, more preferably 15% by mass or less, and even more preferably 12% by mass or less.

[0116] When organic solvents with a standard boiling point of 250°C or higher are present within the above-mentioned range, there is a tendency for the durability and transferability of the transferred image to be further improved.

[0117] In addition, examples of organic solvents with a standard boiling point of 250°C or higher include glycerol and polyethylene glycol monomethyl ether. Organic solvents with a standard boiling point of 250°C or higher are preferably those with a standard boiling point of 270°C or higher, and more preferably those with a standard boiling point of 280°C or higher.

[0118] The content of organic solvent relative to the total amount of the white ink composition is preferably 5% by mass or more and 50% by mass or less, preferably 7% by mass or more and 40% by mass or less, more preferably 10% by mass or more and 35% by mass or less, and particularly preferably 12% by mass or more and 20% by mass or less.

[0119] In particular, the total content of organic solvents in the white ink composition is preferably 20% by mass or less relative to the total amount of the ink composition. In this case, even if the heating temperature when drying the white ink composition is not set to a high temperature, the solvent can be sufficiently evaporated, thus tending to reduce damage to the transfer medium.

[0120] 1.1.2.5 Surfactants

[0121] White ink compositions may also contain surfactants. Surfactants can be used to reduce the surface tension of inks, for example, to adjust and improve the wettability of the surface to which the ink adheres.

[0122] As surfactants, any of the following can be used: nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants; and they can also be used in combination. Furthermore, acetylenic diol surfactants, organosilicon surfactants, and fluorinated surfactants are more preferred among surfactants.

[0123] As an alkynyl diol surfactant, there are no particular limitations; examples include Sufynol 104, 104E, 104H, 104A, 104BC, 104DPM, 104PA, 104PG-50, 104S, 420, 440, 465, 485, SE, SE-F, 504, 61, DF37, CT111, CT121, CT131, CT136, TG, GA, DF110D (trade name, manufactured by Air Products and Chemicals Inc.), and Olfine. B, Y, P, A, STG, SPC, E1004, E1010, PD-001, PD-002W, PD-003, PD-004, PD-005, EXP.4001, EXP.4036, EXP.4051, EXP.4123, EXP.4200, EXP.4300, AF-103, AF-104, AK-02, SK-14, AE-3 (trade name, manufactured by Nissin Chemical Industries), Acetylenol E00, E00P, E40, E100 (trade name, manufactured by Kawaken Fine Chemicals).

[0124] There are no particular limitations on the organosilicon surfactant, but polysiloxane compounds are preferred. There are also no particular limitations on the polysiloxane compound; for example, polyether-modified organosilicon compounds can be cited. Commercially available products of this polyether-modified organosiloxane include, for example, BYK-306, BYK-307, BYK-333, BYK-341, BYK-345, BYK-346, BYK-348 (trade name, manufactured by BYK Corporation), KF-351A, KF-352A, KF-353, KF-354L, KF-355A, KF-615A, KF-945, KF-640, KF-642, KF-643, KF-6020, X-22-4515, KF-6004, KF-6011, KF-6012, KF-6015, KF-6017 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), and Silface SAG503A (manufactured by Nissin Chemical Co., Ltd.).

[0125] As a fluorinated surfactant, fluorinated modified polymers are preferred. For example, BYK-340 (trade name, manufactured by BYK Chemical Japan Co., Ltd.) can be cited.

[0126] Surfactants can be used alone or in combination with two or more. Among them, if the surfactant is an organosilicon surfactant, it can effectively adjust the wettability of the ink-adhering surface and tends to have better wash fastness and transferability.

[0127] The lower limit of the surfactant content relative to the total amount of the white ink composition is preferably 0.05% by mass or more, more preferably 0.10% by mass or more, and even more preferably 0.20% by mass or more. Furthermore, the upper limit of the surfactant content relative to the total amount of the white ink composition is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and particularly preferably 0.7% by mass or less.

[0128] 1.1.2.6 Other ingredients

[0129] The white ink composition may also contain additives such as preservatives / mildew inhibitors, pH adjusters, rust inhibitors, chelating agents, viscosity modifiers, solvent aids, and antioxidants, as needed. The content of such additives is not particularly limited, but is preferably 0.1 to 5% by mass, more preferably 0.1 to 3% by mass, and even more preferably 0.1 to 1% by mass, relative to the total amount of the white ink composition.

[0130] 1.1.2.7 Physical properties

[0131] The viscosity of the white ink composition at 25°C is preferably 2 mPa·s or higher and 10 mPa·s or lower, more preferably 3 mPa·s or higher and 8 mPa·s or lower. This makes it less prone to nozzle clogging in the inkjet head, further improving the ejection stability of the white ink composition. Furthermore, it allows for better nozzle clogging recovery.

[0132] In addition, viscosity can be determined by measuring with a vibratory viscometer, a rotational viscometer, a capillary viscometer, or a falling ball viscometer. For example, with a vibratory viscometer, it can be determined according to JIS Z8809.

[0133] The surface tension of the white ink composition at 25°C is not particularly limited, but is preferably 20 mN / m or more and 60 mN / m or less, more preferably 25 mN / m or more and 50 mN / m or less, and even more preferably 27 mN / m or more and 40 mN / m or less. This makes it less prone to nozzle clogging in the inkjet head, further improving the ejection stability of the white ink composition. Furthermore, it allows for better nozzle clogging recovery.

[0134] Alternatively, surface tension can be measured using the Wilhelmy method or the ring method. Surface tension can be measured using a surface tension meter (e.g., Kyowa Interface Science Co., Ltd., DY-300, DY-500, DY-700, etc.).

[0135] 1.1.3 Adhesive ink composition

[0136] The adhesive ink composition used in the method for manufacturing the transfer medium according to this embodiment is an inkjet ink composition containing resin and water. The adhesive ink composition is not a white ink composition or a non-white ink composition used for coloring, but rather a composition used for bonding images to fabric.

[0137] The following describes the components contained in the adhesive ink composition.

[0138] 1.1.3.1 Resin

[0139] The adhesive ink composition contains a resin. The description of the resin contained in the adhesive ink composition is the same as that in the white ink composition described above.

[0140] Furthermore, the glass transition temperature of the resin contained in the ink-ink composition is as described above, but is particularly preferably -50°C or higher and 25°C or lower. While resins with glass transition temperatures within this range offer excellent fabric adherence (hand feel), they are prone to interfacial peeling during high-temperature washing, presenting a technical problem regarding high-temperature wash fastness. In contrast, according to the method for manufacturing the transfer medium according to this embodiment, even when the ink-ink composition contains a resin with a glass transition temperature within the above range, excellent high-temperature wash fastness can be obtained, achieving a superior balance between fabric adherence (hand feel) and wash fastness.

[0141] The resin content relative to the total amount of the ink composition is preferably 1 to 50% by mass, more preferably 3 to 40% by mass, even more preferably 5 to 30% by mass, particularly preferably 8 to 25% by mass, and even more particularly preferably 10 to 20% by mass. If the resin content is within the above range, there is a tendency to obtain better wash fastness.

[0142] 1.1.3.2 Water

[0143] The adhesive ink composition contains water. The description of the water content in the adhesive ink composition is the same as that in the white ink composition described above.

[0144] The water content relative to the total amount of the adhesive ink composition is preferably 10% by mass or more, more preferably 30% by mass or more, more preferably 40% by mass or more, and particularly preferably 50% by mass or more. There is no particular upper limit to the water content; for example, it is preferably 90% by mass or less relative to the total amount of the adhesive ink composition, more preferably 80% by mass or less, and more preferably 70% by mass or less.

[0145] 1.1.3.3 Organic solvents

[0146] The adhesive ink composition may also contain organic solvents. The description of the organic solvents contained in the adhesive ink composition is the same as that in the white ink composition described above.

[0147] The content of organic solvent relative to the total amount of the ink composition is preferably 5% by mass or more and 50% by mass or less, preferably 7% by mass or more and 40% by mass or less, more preferably 10% by mass or more and 35% by mass or less, and particularly preferably 12% by mass or more and 20% by mass or less.

[0148] In particular, the total content of organic solvents contained in the ink composition is preferably 20% by mass or less relative to the total amount of the ink composition. In this case, even if the heating temperature during drying of the ink composition is not set to a high temperature, the solvent can be sufficiently evaporated, thus tending to reduce damage to the transfer medium.

[0149] 1.1.3.4 Surfactants

[0150] The adhesive ink composition may also contain surfactants. The description of surfactants contained in the adhesive ink composition is the same as that for the white ink composition described above.

[0151] The lower limit of the surfactant content relative to the total amount of the adhesive ink composition is preferably 0.05% by mass or more, more preferably 0.10% by mass or more, and more preferably 0.20% by mass or more.

[0152] Furthermore, the upper limit of the surfactant content relative to the total amount of the adhesive ink composition is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and particularly preferably 0.7% by mass or less.

[0153] 1.1.3.5 Other ingredients

[0154] The adhesive ink composition may also contain additives such as preservatives / mildew inhibitors, pH adjusters, rust inhibitors, chelating agents, viscosity modifiers, solvent aids, and antioxidants, as needed. The content of such additives is not particularly limited, but is preferably 0.1 to 5% by mass, more preferably 0.1 to 3% by mass, and even more preferably 0.1 to 1% by mass, relative to the total amount of the adhesive ink composition.

[0155] The adhesive ink composition may also contain white pigments, non-white pigments, etc., but the total mass of the adhesive ink composition is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.05% by mass or less, and the lower limit is 0% by mass.

[0156] 1.1.3.6 Physical properties

[0157] The viscosity and surface tension of the adhesive ink composition are the same as those of the white ink composition described above.

[0158] 1.2 Non-white image formation process

[0159] The method for manufacturing the transfer medium according to this embodiment may also include a step of forming a non-white image by adhering a non-white ink composition to the substrate using an inkjet method (non-white image forming step).

[0160] 1.2.1 Attachment method

[0161] The adhesion amount of the non-white ink composition relative to the substrate in the non-white image forming process is preferably 100 g / m². 2 The following is more preferably 80g / m 2 The following is a further preferred value: 60g / m 2 The following is a further preferred value: 50g / m 2 the following.

[0162] Furthermore, there is no particular limitation on the lower limit of the amount of non-white ink composition adhering to the substrate in the non-white image forming process, but 5 g / m² is preferred. 2 The above, more preferably 10g / m 2 The above is further preferred to be 15g / m 2 The above, especially preferred, is 20g / m 2 above.

[0163] The order of the non-white image formation process is not particularly limited, but it is preferable to perform it before the aforementioned mixed layer formation process. When the non-white image formation process is performed before the mixed layer formation process, the mixed layer formed by the mixed layer formation process is formed on the substrate on which the non-white image has been formed in the non-white image formation process. Normally, if ink layers are formed by overlapping, interface peeling is likely to occur. However, according to the method for manufacturing the transfer medium according to this embodiment, even if the mixed layer is formed on the substrate on which the non-white image is formed, excellent high-temperature wash fastness can be obtained. Furthermore, the mixed layer can be formed on the substrate, on the non-white image, or on other ink layers formed on the non-white image.

[0164] 1.2.2 Non-white ink compositions

[0165] The non-white ink composition used in the method for manufacturing the transfer medium according to this embodiment is an inkjet ink composition that may contain non-white pigments, resins, and water.

[0166] The following describes the components contained in the non-white ink composition.

[0167] 1.2.2.1 Non-white pigments

[0168] Non-white ink compositions contain non-white pigments. Examples of non-white pigments include pigments and dyes other than white pigments. Examples of pigments include inorganic pigments and organic pigments.

[0169] There are no particular restrictions on inorganic pigments. Examples include carbon blacks such as CI Pigment Black 6 (lamp black, plant black), CI Pigment Black 7 (furnace black, channel black, thermal cracking black, acetylene black), CI Pigment Black 8 (charcoal black), and CI Pigment Black 10 (graphite); and white pigments such as iron oxide, titanium oxide, zinc oxide, and silicon dioxide.

[0170] Examples of carbon blacks include No. 2300, 900, MCF88, No. 20B, No. 33, No. 40, No. 45, No. 52, MA7, MA8, MA100, and No. 2200B manufactured by Mitsubishi Chemical Corporation. Examples of carbon blacks include ColorBlack FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex 35, U, V, 140U, SpecialBlack 6, 5, 4A, 4, and 250 manufactured by Degussa. Examples of carbon blacks include Conductex SC, Raven 1255, 5750, 5250, 5000, 3500, 1255, and 700 manufactured by Columbia Carbon. Examples include Cabot's Regal 400R, 330R, 660R, Mogul L, Monarch 700, 800, 880, 900, 1000, 1100, 1300, 1400, and Elftex 12.

[0171] Examples of organic pigments include quinacridone pigments, quinacridone quinone pigments, dioxazine pigments, phthalocyanine pigments, anthraquinone pigments, anthraquinone pigments, indanone pigments, flavanone pigments, perylene pigments, diketopyrrolopyrrole pigments, violet ketone pigments, quinacridone pigments, anthraquinone pigments, thioindigo pigments, benzimidazolone pigments, isoindolinone pigments, azomethyl alkaloid pigments, or azo pigments.

[0172] The following organic pigments can be cited as specific examples of organic pigments.

[0173] Examples of cyan pigments include CI Pigment Blue 1, 2, 3, 15:3, 15:4, 15:34, 16, 22, 60, etc.; CI Vat Blue 4, 60, etc.; preferably, a mixture of one or more of the groups consisting of CI Pigment Blue 15:3, 15:4 and 60 can be cited.

[0174] Examples of magenta pigments include CI pigment red 5, 7, 12, 48 (Ca), 48 (Mn), 57 (Ca), 57:1, 112, 122, 123, 168, 184, 202, CI pigment violet 19, etc., and preferably, one or more mixtures selected from the group consisting of CI pigment red 122, 202 and 209, CI pigment violet 19.

[0175] Examples of yellow pigments include CI pigment yellows 1, 2, 3, 12, 13, 14C, 16, 17, 73, 74, 75, 83, 93, 95, 97, 98, 119, 110, 114, 128, 129, 138, 150, 151, 154, 155, 180, and 185. Preferably, examples include one or more mixtures selected from the group consisting of CI pigment yellows 74, 109, 110, 128, 138, 150, and 180.

[0176] Other colors of pigment can also be used. For example, orange pigment, green pigment, etc.

[0177] Pigments can be used alone or in combination of two or more.

[0178] Pigments can also be used after being dispersed in a dispersant, just like the white pigments described above. Regarding dispersants, they can be used as described above, therefore, further explanation is omitted.

[0179] As a dye, there are no particular limitations; acid dyes, direct dyes, reactive dyes, and basic dyes can be used. A dye can be used alone or in combination with two or more.

[0180] As dyes, there are no particular limitations. Examples include CI Acid Yellow 17, 23, 42, 44, 79, 142; CI Acid Red 52, 80, 82, 249, 254, 289; CI Acid Blue 9, 45, 249; CI Acid Black 1, 2, 24, 94; CI Food Black 1, 2; and CI Direct Yellow 1, 12, 24, 33, 50, 55, 58, 86, 132. 142, 144, 173, CI Direct Red 1, 4, 9, 80, 81, 225, 227, CI Direct Blue 1, 2, 15, 71, 86, 87, 98, 165, 199, 202, CI Direct Black 19, 38, 51, 71, 154, 168, 171, 195, CI Reactive Red 14, 32, 55, 79, 249, CI Reactive Black 3, 4, 35.

[0181] The content of the non-white pigment relative to the total amount of the non-white ink composition is preferably 0.1 to 25% by mass, more preferably 1 to 20% by mass, even more preferably 1 to 15% by mass, particularly preferably 1 to 10% by mass, and even more particularly preferably 2 to 7% by mass. If the content of the non-white pigment is within the above range, there is a tendency to obtain better color development.

[0182] 1.2.2.2 Resin

[0183] Non-white ink compositions may also contain resin. The description of the resin contained in non-white ink compositions is the same as that for white ink compositions described above.

[0184] The resin contained in the non-white ink composition is preferably the same type of resin as that in the white ink composition, and more preferably a polyurethane resin. Polyurethane resin has excellent elasticity, therefore, by containing polyurethane resin in the non-white ink composition that forms the image, a good tactile feel can be achieved.

[0185] In particular, it is preferred that the white ink composition contains polyurethane resin, the adhesive ink composition contains polyester resin, and the non-white ink composition contains polyurethane resin. According to the method for manufacturing the transfer medium according to this embodiment, excellent high-temperature wash fastness can be obtained, and by containing polyurethane resin in the white ink composition and the non-white ink composition, a good hand feel can be achieved, and by containing polyester resin in the adhesive ink composition, good transferability can be achieved.

[0186] The resin content relative to the total amount of the non-white ink composition is preferably 0.5 to 25% by mass, more preferably 1 to 20% by mass, even more preferably 1 to 15% by mass, particularly preferably 2 to 10% by mass, and even more particularly preferably 2 to 8% by mass. If the resin content is within the above range, there is a tendency to obtain better wash fastness.

[0187] 1.2.2.3 Water

[0188] Non-white ink compositions may also contain water. The description of water content in non-white ink compositions is the same as that for white ink compositions described above.

[0189] The water content relative to the total amount of the non-white ink composition is preferably 10% by mass or more, more preferably 30% by mass or more, more preferably 40% by mass or more, and particularly preferably 50% by mass or more. There is no particular upper limit to the water content; for example, it is preferably 90% by mass or less relative to the total amount of the non-white ink composition, more preferably 80% by mass or less, and more preferably 70% by mass or less.

[0190] 1.2.2.4 Organic solvents

[0191] Non-white ink compositions may also contain organic solvents. The descriptions of organic solvents contained in non-white ink compositions are the same as those for white ink compositions described above.

[0192] The content of organic solvent relative to the total amount of the non-white ink composition is preferably 5% by mass or more and 50% by mass or less, preferably 7% by mass or more and 40% by mass or less, more preferably 10% by mass or more and 35% by mass or less, and particularly preferably 12% by mass or more and 30% by mass or less.

[0193] In particular, the total content of organic solvents in the non-white ink composition is preferably 30% by mass or less relative to the total amount of the non-white ink composition. In this case, even if the heating temperature when drying the non-white ink composition is not set to a high temperature, the solvent can be sufficiently evaporated, thus tending to reduce damage to the transfer medium.

[0194] 1.2.2.5 Surfactants

[0195] Non-white ink compositions may also contain surfactants. The descriptions of surfactants contained in non-white ink compositions are the same as those for white ink compositions described above.

[0196] The lower limit of the surfactant content relative to the total amount of the non-white ink composition is preferably 0.05% by mass or more, more preferably 0.10% by mass or more, and more preferably 0.20% by mass or more.

[0197] Furthermore, the upper limit of the surfactant content relative to the total amount of the non-white ink composition is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and particularly preferably 0.7% by mass or less.

[0198] 1.2.2.6 Other ingredients

[0199] The non-white ink composition may also contain additives such as preservatives / mildew inhibitors, pH adjusters, rust inhibitors, chelating agents, viscosity modifiers, solvent aids, and antioxidants, as needed. The content of such additives is not particularly limited, but is preferably 0.1 to 5% by mass, more preferably 0.1 to 3% by mass, and even more preferably 0.1 to 1% by mass, relative to the total amount of the non-white ink composition.

[0200] 1.2.2.7 Physical properties

[0201] The viscosity and surface tension of the non-white ink composition are the same as those of the white ink composition described above.

[0202] 1.3 White Image Formation Process

[0203] The method for manufacturing the transfer medium according to this embodiment may also include a step of forming a white image by adhering a white ink composition to the substrate using an inkjet method (white image forming step).

[0204] The preferred amount of white ink composition adhering to the substrate in the white image forming process is 500 g / m². 2 The following is more preferably 300g / m 2 The following is a further preferred value: 150g / m 2 The following is a further preferred value: 120g / m 2 The following is particularly preferred: 80g / m 2 The following is a more particularly preferred value: 50g / m 2 the following.

[0205] Furthermore, there is no particular limitation on the lower limit of the amount of white ink composition adhering to the substrate in the white image forming process, but 1 g / m² is preferred. 2 The above, preferably 4g / m 2 The above is further preferred to be 10g / m 2 The above, especially preferred, is 15g / m 2 The above is preferred, and even more preferably, it is 20g / m 2 above.

[0206] The order of the white image formation process is not particularly limited, but it is preferable to perform it after the aforementioned non-white image formation process and before the aforementioned mixed layer formation process. When the white image formation process is performed after the non-white image formation process and before the mixed layer formation process, a white image can be formed on top of a non-white image, and a mixed layer can be formed on top of a white image. Generally, if multiple ink layers are formed on top of each other, interface peeling is more likely to occur. However, according to the method for manufacturing the transfer medium according to this embodiment, even if the mixed layer is formed on top of a white image formed on top of a non-white image, excellent high-temperature wash fastness can be obtained.

[0207] 1.4 Ink and Adhesive Layer Formation Process

[0208] The method for manufacturing the transfer medium according to this embodiment may also include a step of forming an ink layer by adhering the ink composition to the substrate using an inkjet method (ink layer formation step).

[0209] The adhesion amount of the adhesive ink composition relative to the substrate in the adhesive ink layer formation process is preferably 1000 g / m². 2 The following is more preferably 400g / m 2 The following is a further preferred value: 250g / m 2The following is a further preferred value: 150g / m 2 The following is particularly preferred: 100g / m 2 The following is a more particularly preferred option: 70g / m 2 The following is particularly preferred: 50g / m 2 The following applies. Furthermore, the lower limit of the amount of adhesive ink composition adhering to the substrate in the adhesive ink layer formation process is not particularly limited, but is preferably 1 g / m². 2 The above, more preferably 10g / m 2 The above is further preferred to be 20g / m 2 The above, especially preferred, is 30g / m 2 above.

[0210] The order of the ink-adhesive layer formation process is not particularly limited, but it is preferable to perform it after the aforementioned mixing layer formation process. When the ink-adhesive layer formation process is performed after the mixing layer formation process, the ink-adhesive layer can be formed overlappingly on the mixing layer. Generally, if multiple ink layers are formed overlappingly, interface peeling is more likely to occur, but according to the method for manufacturing the transfer medium according to this embodiment, even if the ink-adhesive layer is formed overlappingly on the mixing layer, excellent high-temperature wash fastness can be obtained.

[0211] 1.5 Heating Process

[0212] The method for manufacturing the transfer medium according to this embodiment may also include a step of heating the substrate (heating step). By including the heating step, the drying properties of each ink composition can be improved, and the migration of ink to the fabric caused by insufficient drying of the ink can be reduced.

[0213] There is no particular restriction on the order of the heating processes. For example, the heating processes can be performed before, after, or simultaneously with the processes that form the aforementioned layers.

[0214] When the heating process is performed before or simultaneously with the processes for forming the aforementioned layers (a single heating process), the ink adhering to the substrate can be dried at an early stage. A single drying process is a process used to dry at least a portion of the solvent component of the ink adhering to the substrate to a degree that at least reduces ink flow.

[0215] A single heating process can be performed, for example, by a method of supplying air (warm air) to heat the substrate based on a fan or similar means, an IR heater, a microwave radiation method, a heat transfer method based on heating the substrate by a flat plate heater or similar means, or a combination of these methods.

[0216] The surface temperature of the substrate in a single heating process is preferably 30°C or higher, more preferably 35°C or higher, and even more preferably 40°C or higher. Furthermore, the upper limit of the surface temperature of the substrate in a single heating process is preferably 60°C or lower, and even more preferably 50°C or lower.

[0217] In particular, the heating process is preferably performed during the formation of the mixing layer (i.e., simultaneously with the mixing layer formation process). When the substrate is heated during the formation of the mixing layer, the drying properties of both the white ink composition and the adhesive ink composition are improved, and migration is reduced even when the amount of ink adhering to the substrate increases.

[0218] When the heating process is performed after the processes that form the above layers (post-heating process), the ink adhering to the transfer medium can be fully dried. The post-heating process is a heating process used to fully dry the solvent components of the ink and to heat the resins contained in the ink to flatten the ink coating.

[0219] Heating of the substrate in the post-heating process can be performed using a suitable heating unit, for example, when using an inkjet recording device. Furthermore, it can be performed using a suitable heating unit, not limited to those found in inkjet recording devices.

[0220] The surface temperature of the substrate in the post-heating process is preferably 100°C or higher, more preferably 120°C or higher, and even more preferably 150°C or higher. Furthermore, the upper limit of the surface temperature of the substrate in the post-heating process is preferably 200°C or lower, more preferably 180°C or lower.

[0221] 1.6 Substrate

[0222] The shape of the substrate used in the method for manufacturing the transfer medium according to this embodiment is not particularly limited, but a film-like substrate is preferred. When it is a film-like substrate, the thickness of the substrate is preferably 50 μm or more and 200 μm or less.

[0223] The substrate preferably has a recording surface that does not absorb or hardly absorbs liquids such as ink compositions. Here, "does not absorb or hardly absorbs liquids" means, quantitatively, "from the start of contact to 30 msec in the Bristow method". 1 / 2 The water absorption rate up to this point is 10 mL / m 2 the following".

[0224] Examples of substrates with non-absorbent recording surfaces include plastic films or sheets such as polyvinyl chloride, polyethylene, polypropylene, and polyethylene terephthalate (PET); metal sheets such as iron, silver, copper, and aluminum; metal sheets or plastic films manufactured by vapor deposition of these various metals; and alloy sheets such as stainless steel or brass. Furthermore, examples include substrates coated with plastic on paper, substrates with plastic films bonded to paper, and plastic films without an absorbent layer (accepting layer). Examples of plastics used herein include polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethane, polyethylene, and polypropylene.

[0225] As a substrate with a recording surface that hardly absorbs liquid, examples include substrates with a coating layer (ink receiving layer) for receiving liquid on their surface, such as substrates with a coating layer (ink receiving layer) applied to the surface of polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethane, polyethylene, polypropylene, etc. Additionally, coating layers that are difficult to absorb ink can be examples of coating layers where inorganic compound particles are applied together with an adhesive.

[0226] Among them, the substrate is preferably a film with an ink-receiving layer. By using such a substrate, there is a tendency for improved transferability and wash fastness.

[0227] Furthermore, the substrate may also have a release layer that serves as a release layer. By having a release layer on the substrate, images formed on the transfer medium can be transferred more effectively, and better wash fastness can be achieved. Examples of materials that can be used as the release layer include polyethylene wax-based release agents, silicone-based release agents, and fluorinated release agents. Additionally, the release layer can also serve as an ink receiving layer.

[0228] The thickness of the release layer is not particularly limited, but is preferably 5 μm or more and 80 μm or less, and more preferably 10 μm or more and 50 μm or less.

[0229] The total amount of the white ink composition, adhesive ink composition, and non-white ink composition adhered to the substrate is preferably 550 g / m². 2 The following is more preferably 400g / m 2 The following is a further preferred value: 300g / m 2 The following is a further preferred value: 250g / m 2 The following is particularly preferred: 200g / m 2 The following applies. If the amount of adhesion is within the above range, migration can be further reduced. Furthermore, the lower limit of the total amount of the white ink composition, adhesive ink composition, and non-white ink composition adhered to the substrate is not particularly limited, but is preferably 30 g / m³. 2The above, more preferably 50g / m 2 The above is further preferred to be 80g / m 2 The above, especially preferred, is 100g / m 2 above.

[0230] The total adhesion amount of the above-mentioned adhesive ink composition to the substrate is preferably 40 g / m². 2 The above, more preferably 60g / m 2 The above is further preferred to be 80g / m 2 The above applies. If the amount of adhesion is within the above range, it tends to have better wash fastness and transferability.

[0231] Furthermore, there is no particular limitation on the upper limit of the total amount of the above-mentioned adhesive ink composition adhering to the substrate, but it is preferably 700 g / m². 2 The following is a further preferred value: 500g / m 2 The following is more preferably 300g / m 2 The following is particularly preferred: 200g / m 2 The following is a more preferred value: 150g / m 2 the following.

[0232] 1.7 Recording device

[0233] An inkjet recording apparatus that can be preferably used in the method for manufacturing the transfer medium according to this embodiment will be described.

[0234] As an example of an inkjet recording device, Figure 1 A 3D diagram of a serial printer is shown. (For example...) Figure 1 As shown, the serial printer 20 includes a conveying unit 220 and a recording unit 230. The conveying unit 220 conveys the substrate F fed to the serial printer to the recording unit 230 and discharges the recorded substrate out of the serial printer. Specifically, the conveying unit 220 has conveying rollers that convey the substrate F in the conveying direction TD.

[0235] In addition, the recording unit 230 includes: a carriage 234 with an inkjet head 231, the inkjet head 231 having a nozzle for spraying a white ink composition onto a substrate F conveyed from the transport unit 220, a nozzle for spraying a glue ink composition, and a nozzle for spraying a non-white ink composition; and a carriage moving mechanism 235 for moving the carriage 234 in the scanning direction SD of the substrate F.

[0236] Figure 3 An example of the nozzle rows on the nozzle surface of the inkjet head 231 is shown. Figure 3In the inkjet head 231, there are multiple nozzle columns A to H along the scanning direction SD. Each nozzle column is composed of multiple nozzles arranged along a direction (transport direction TD) that intersects the direction in which the inkjet head 231 moves (scanning direction SD).

[0237] At this time, when the nozzle array that ejects the white ink composition along the scanning direction SD is projected, it is configured such that at least a portion of the nozzle array that ejects the adhesive ink composition overlaps with the nozzle array that ejects the adhesive ink composition in the transport direction TD. This allows the process of forming a mixed layer by attaching the white ink composition and the adhesive ink composition to the same area of ​​the substrate by inkjet printing to be performed in the same scan.

[0238] The inks ejected from each nozzle row are appropriately selected, but for example, it is preferable to select columns A to D for ejecting non-white ink compositions, columns E to F for ejecting white ink compositions, and columns G to H for ejecting adhesive ink compositions.

[0239] In the case of a serial printer, the inkjet head 231 has a length smaller than the width of the recording medium, and records while moving in a scanning direction SD that intersects the transport direction TD of the substrate F. Furthermore, in a serial printer, the inkjet head 231 is mounted on a carriage 234 that moves in a predetermined direction, and the ink composition is ejected onto the substrate by moving the inkjet head with the carriage. Substrate transport can also be performed between scans.

[0240] Furthermore, the inkjet device is not limited to the serial printer described above; it can also be a line printer. Figure 2 The image shows a schematic side view of a line printer, another example of an inkjet recording device. Figure 2 As shown, the line printer 1 includes a feed unit 100, a conveying mechanism 200 for conveying substrate in the conveying direction, a line head 300 for spraying ink and adhering it to the substrate, a control unit 500, and an discharge unit 700.

[0241] A conveying mechanism is a mechanism that transports substrates in a conveying direction. Figure 2 In this process, a rolled substrate F is supplied from the feed section 100 to the conveying mechanism 200, which is configured to convey the substrate F from the feed section 100 to the conveyor head 300. Specifically, the conveying mechanism 200 has a first conveying roller 201 and a second conveying roller 202, and is configured to convey the substrate F downstream in the conveying direction to the conveyor head 300. As the conveying method of the conveying mechanism 200, conventionally known conveying methods can be appropriately used, or one or more rollers or a belt conveyed by rollers can be used.

[0242] The line printer 1 has a line head 300, which has a length approximately equal to the width of the substrate F. The line head 300 can be composed of multiple line inkjet heads. Figure 2 In this context, the line header 300 consists of the first line header 310, the second line header 320, the third line header 330, the fourth line header 340, and the fifth line header 350. Alternatively, when there is no need to distinguish between the first line header 310, the second line header 320, the third line header 330, the fourth line header 340, and the fifth line header 350, they are also simply referred to as line header 300.

[0243] The printhead 300 includes: a cavity for containing a white ink composition, a glue ink composition, and a non-white ink composition (ink, etc.); an ejection drive unit provided for each cavity; and a nozzle for ejecting ink, etc. Multiple cavities, ejection drive units provided for each cavity, and nozzles can also be provided independently in one printhead. The ejection drive unit can be formed using an electromechanical conversion element such as a piezoelectric element that changes the volume of the cavity through mechanical deformation, or an electrothermal conversion element that generates heat to create ink bubbles and eject them, etc.

[0244] The structure of the line print head 300 is preferably such that a white ink composition is ejected from the third line print head 330 and a colloid ink composition is ejected from the fourth line print head 340. This allows for the preferred process of forming a mixed layer by adhering the white ink composition and the colloid ink composition to the same area of ​​the substrate using inkjet printing within the same scan. Furthermore, it is preferable to perform a non-white image formation process, a white image formation process, and a colloid ink layer formation process by ejecting a non-white ink composition from the first line print head 310, a white ink composition from the second line print head 320, and a colloid ink composition from the fifth line print head 350.

[0245] In line printers, the printhead is (roughly) stationary and records data in a single scan. Line printers are more advantageous than serial printers in terms of faster recording speed.

[0246] 2. Transfer Recording Method

[0247] One embodiment of the present invention relates to a transfer recording method comprising: a step of manufacturing a transfer medium by the above-described manufacturing method; and a step of heat-transferring the mixed layer to the fabric by heating the transfer medium with the surface of the mixed layer formed thereon facing the fabric.

[0248] The transfer recording method described in this embodiment uses a transfer medium manufactured by the above-described manufacturing method to perform transfer recording, and can obtain a recording with excellent high-temperature washing fastness.

[0249] The following describes each step of the transfer recording method according to this embodiment.

[0250] 2.1 Transfer media manufacturing process

[0251] The transfer recording method according to this embodiment includes a step of manufacturing a transfer medium using the above-described manufacturing method (transfer medium manufacturing step). The transfer medium manufacturing step is the same as the above-described transfer medium manufacturing method, so its description is omitted.

[0252] 2.2 Heat transfer process

[0253] The transfer recording method according to this embodiment includes a step (heat transfer step) of transferring the mixed layer to the fabric by heating the transfer medium with the surface of the mixed layer facing the fabric.

[0254] By performing a heat transfer process, an image formed on a transfer medium can be transferred to fabric. The transferred image comprises layers formed in the aforementioned method for manufacturing the transfer medium, including at least a mixed layer.

[0255] The heating temperature in the heat transfer process is not particularly limited, but is preferably 120°C or higher and 270°C or lower, more preferably 140°C or higher and 250°C or lower, and even more preferably 150°C or higher and 210°C or lower. If the heating temperature is within the above range, it tends to suppress the residue of each layer formed in the above-described method for manufacturing the transfer medium on the substrate, and also to save energy and improve the productivity of the recorded material.

[0256] When the glass transition temperature of the resin contained in the ink composition is set to Tg [°C], and the heating temperature in the heat transfer process is set to Tp [°C], it is preferable to satisfy the relationship 70 ≤ Tp - Tg ≤ 290, more preferably to satisfy the relationship 95 ≤ Tp - Tg ≤ 260, and even more preferably to satisfy the relationship 110 ≤ Tp - Tg ≤ 210. When such relationships are satisfied, there is a tendency to suppress the residue of each layer formed in the above-described method for manufacturing the transfer medium on the substrate, and to save energy and improve the productivity of the recorded material.

[0257] There is no particular limitation on the heating time in the heat transfer process, but it is preferably 5 seconds or more and 90 seconds or less, more preferably 15 seconds or more and 70 seconds or less, and even more preferably 20 seconds or more and 60 seconds or less.

[0258] The heat transfer process can be carried out by heating the fabric with the surface of the transfer medium containing at least a mixed layer of the image facing it, and can be done by any method, but is more preferably by hot pressing.

[0259] When performing a heat transfer process via hot pressing, the pressure applied to the laminate of the transfer medium and the fabric is preferably 0.1 N / cm. 2 Above and 30 N / cm 2 The following is more preferably 0.6 N / cm 2 Above and 15 N / cm 2 The following is a further preferred value of 1.5 N / cm. 2 Above and 5N / cm 2 the following.

[0260] As for fabric, there are no particular limitations. The raw materials constituting the fabric are also not particularly limited; examples include natural fibers such as cotton, linen, wool, and silk; synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide, and polyurethane; biodegradable fibers such as polylactic acid; and blends of these fibers. Fabric can be made from the fibers listed above into any form, such as woven fabric, knitted fabric, or nonwoven fabric, and can also be fabric that has undergone blending or other similar processes.

[0261] In this embodiment, the form of fabric can include cloth, clothing, or other accessories. Cloth includes textiles, woven fabrics, non-woven fabrics, etc. Clothing and other accessories include not only sewn T-shirts, handkerchiefs, scarves, towels, tote bags, cloth bags, curtains, sheets, bedspreads, wallpaper, and other household items, but also fabric before and after cutting, which is used as a component before sewing. Examples of these forms include long strips rolled into rolls, cut to predetermined sizes, and product shapes.

[0262] 2.3 Cleaning Process

[0263] The transfer recording method described in this embodiment may also include a step of washing the fabric with water at a temperature higher than the glass transition temperature of the resin contained in the ink composition (washing step).

[0264] While a cleaning process can effectively remove components of the ink composition that are not fixed to the fabric, the use of water at a temperature higher than the glass transition temperature of the resin contained in the ink composition presents a technical problem regarding high-temperature washing adhesion. In contrast, the transfer recording method according to this embodiment can clean the fabric while suppressing interfacial peeling caused by high-temperature cleaning.

[0265] The water temperature in the cleaning process is preferably higher than the glass transition temperature of the resin contained in the adhesive ink composition, more preferably 10°C or more higher than the glass transition temperature of the resin contained in the adhesive ink composition, even more preferably 20°C or more higher than the glass transition temperature of the resin contained in the adhesive ink composition, and particularly preferably 30°C or more higher than the glass transition temperature of the resin contained in the adhesive ink composition.

[0266] 2.4 Other processes

[0267] The transfer recording method described in this embodiment may also include a step of heating and drying again after the cleaning step.

[0268] 3. Example

[0269] The present invention will be described in more detail below through examples, but the invention is not limited to these examples. Unless otherwise specified, "%" refers to a quality standard.

[0270] 3.1 Preparation of each ink composition

[0271] To become Table 1 ( Figure 5 The components are added to a container and mixed and stirred in the manner described above, and then filtered through a 5 μm membrane filter to obtain the respective ink compositions. Furthermore, the mass percentages of pigments and resins in the table represent the amount of solid components, and water is added to make the total mass of the composition 100% by mass. In addition, each pigment is used as a dispersion prepared prior to the following steps.

[0272] For black, cyan, magenta, and yellow pigments, use the following pigment dispersion: mix them in water with a water-soluble styrene-acrylic resin pigment dispersant (not shown in Table 1) at a mass ratio of 1:1 (pigment: pigment dispersant), and stir thoroughly to prepare the pigment dispersion.

[0273] For the white pigment, an anionic resin dispersant was used as the pigment dispersant. Specifically, a styrene-acrylic resin was used, which was synthesized using 55% by mass of styrene, 20% by mass of acrylic acid, and 30% by mass of methyl methacrylate. For 3 parts by mass of white pigment, 1 part by mass of dispersant and 10 parts by mass of deionized water were mixed. After premixing the resulting mixture, it was dispersed for 15 minutes for 0.03 mm diameter zirconia beads at a circumferential speed of 10 m / s and a liquid temperature of 30°C using a bead mill disperser (manufactured by Kotobukuri Kogyo Co., Ltd., UAM-015). The coarse particles were then separated by centrifugation using a centrifuge (manufactured by Kuboyama Shoji Co., Ltd., Model-3600) to obtain the pigment dispersion.

[0274] Supplementary explanations are provided for the information recorded in Table 1.

[0275] [Non-white pigment]

[0276] Black pigment (CI Pigment Black 6)

[0277] Cyan pigment (CI Pigment Blue 15:3)

[0278] Magenta pigment (CI Pigment Red 122)

[0279] Yellow pigment (CI Pigment Yellow 74)

[0280] [White pigment]

[0281] White pigment (CI pigment white 6)

[0282] [Resin]

[0283] Polyurethane resin (TakelacW-6110, a trade name manufactured by Mitsui Chemicals Co., Ltd.)

[0284] Polyester resin (Plascoat Z-880, trade name manufactured by Koyo Chemical Industry Co., Ltd., glass transition temperature: -50℃~25℃)

[0285] [surfactant]

[0286] Organosilicon surfactant (BYK-348, trade name manufactured by BYK Corporation)

[0287] 3.2 Preparation of transfer media

[0288] First, prepare a substrate (Inkmania, DTF printing film) with an ink receiving layer on a polyethylene terephthalate film.

[0289] Next, the ink compositions obtained above were filled into the inkjet recording device (manufactured by Seiko Epson, SC-F2150), according to Table 2 ( Figure 6 Under the recording conditions described (as shown), ink is ejected from the inkjet head onto the surface of the substrate where the ink receiving layer is provided, forming each ink layer.

[0290] Specifically, as shown in Table 2, the first layer is a colored ink layer, the second layer is a white ink layer, the third layer is a mixture of white ink and adhesive ink, and the fourth layer is an adhesive ink layer. Each ink composition is sprayed in an overlapping manner, following the order from the first to the fourth layer, using the ink injection amounts shown in Table 2. Furthermore, in Table 2, the injection amount is 0 g / m³. 2 The layer indicates that no ink has been ejected.

[0291] In the third layer, a hybrid layer is formed by applying white ink and adhesive ink to the same area of ​​the substrate using an inkjet printing method.

[0292] In addition, in Examples 16 and 17, a flat plate heater was used to heat the surface of the substrate with the ink to 40°C.

[0293] The substrate with the ink applied was dried at 160°C for 5 minutes to obtain the transfer media involved in each example.

[0294] 3.3 Preparation of transfer material

[0295] With the surface of the transfer medium containing at least a third layer (hybrid layer) facing a cotton fabric (#4000) manufactured by Nisshinbo Co., Ltd., a heat treatment is performed at 180°C for 40 seconds, thereby heat-transferring the image containing the third layer (hybrid layer) onto the fabric. Then, by removing the substrate, the transfer product involved in each example is obtained.

[0296] 3.4 Evaluation Test

[0297] 3.4.1 Wash fastness

[0298] For the transfer materials involved in the above examples, they were washed 10 times consecutively at room temperature (RT) or 5 times at a water temperature of 70°C, and evaluated according to the following evaluation criteria.

[0299] (Evaluation Criteria)

[0300] A: Even after washing 10 times at room temperature or 5 times at 70°C, there was no peeling or damage.

[0301] B: Peeling or damage occurred during a single wash.

[0302] C: Most of the peeling occurs in a single wash.

[0303] 3.4.2 Migration

[0304] For the transfer materials involved in the examples above, the occurrence of migration was visually observed, and the evaluation was conducted according to the following evaluation criteria. Furthermore, migration refers to the transfer of dye from the fabric due to insufficient drying during the intermediate drying of the transfer medium.

[0305] (Evaluation Criteria)

[0306] A: There was absolutely no migration.

[0307] B: Migration occurred only slightly.

[0308] C: Vigorous migration

[0309] 3.4.3 Transferability

[0310] When transferring the transfer media involved in the above examples to fabric, the resulting image is visually verified to ensure its peeling state from the substrate, and the following evaluation criteria are used for evaluation.

[0311] (Evaluation Criteria)

[0312] A: Capable of transferring without peeling or damage.

[0313] B: Minor peeling and damage occurred.

[0314] C: Most cannot be transferred

[0315] 3.5 Evaluation Results

[0316] The evaluation results are shown in Table 2.

[0317] According to the results in Table 2, in the process of forming a mixed layer by adhering a white ink composition and a glue ink composition to the same area of ​​a substrate in the same scan using an inkjet method, wherein the white ink composition contains white pigment, resin and water, and the glue ink composition contains resin and water, and the resin contained in the white ink composition and the resin contained in the glue ink composition are different types of resins, excellent high-temperature wash fastness can be obtained in all embodiments of the method for manufacturing the transfer medium.

[0318] In contrast, in the comparative examples of manufacturing methods for transfer media that do not meet the above-described structure, at least the high-temperature washing fastness is poor.

[0319] The following content is derived from the above implementation method.

[0320] One method of manufacturing transfer media includes a step of forming a hybrid layer by adhering a white ink composition and a glue ink composition to the same area of ​​a substrate using an inkjet method within the same scan. The white ink composition contains white pigment, resin, and water. The adhesive ink composition contains resin and water. The resin contained in the white ink composition and the resin contained in the adhesive ink composition are different types of resins.

[0321] In one embodiment of the above-mentioned method for manufacturing the transfer medium, it is also possible that... The resin types are selected from polyurethane resin, polyester resin, acrylic resin, olefin resin, fluorene resin, rosin-modified resin, terpene resin, amide resin, epoxy resin, and vinyl chloride resin.

[0322] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The white ink composition contains a polyurethane resin. The resin contained in the adhesive ink composition is polyester resin.

[0323] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The method for manufacturing the transfer medium includes a step of forming a non-white image by adhering a non-white ink composition to the substrate using an inkjet method. The hybrid layer is formed on the substrate on which the non-white image is formed. The non-white ink composition contains a non-white pigment, resin, and water.

[0324] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The method for manufacturing the transfer medium includes a step of forming a white image by adhering the white ink composition to the substrate using an inkjet method. The white image is overlapped on the non-white image, and the mixed layer is overlapped on the white image.

[0325] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The white ink composition contains a polyurethane resin. The resin contained in the adhesive ink composition is polyester resin. The non-white ink composition contains a polyurethane resin.

[0326] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The method for manufacturing the transfer medium includes a step of adhering the adhesive ink composition to the substrate by inkjet printing to form an adhesive ink layer. The adhesive ink layers are overlapped and formed on the mixed layer.

[0327] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The substrate is a film with an ink-receiving layer.

[0328] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The method for manufacturing the transfer medium includes a step of heating the substrate during the formation of the hybrid layer.

[0329] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The resin contained in the adhesive ink composition has a glass transition temperature of -50°C or higher and 25°C or lower.

[0330] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The total amount of the white ink composition, the adhesive ink composition, and the non-white ink composition adhered to the substrate is 550 g / m². 2 the following.

[0331] In any of the above-mentioned methods for manufacturing the transfer medium, it is also possible that... The total amount of the adhesive ink composition adhering to the substrate is 40 g / m². 2 above.

[0332] One method of transfer recording has the following characteristics: The process of manufacturing transfer media using the above manufacturing method; and The process of heat-transferring the mixed layer onto the fabric by heating the transfer medium with the surface of the mixed layer facing the fabric.

[0333] In one of the above-mentioned transfer recording methods, it is also possible to... The transfer recording method includes a step of washing the fabric with water at a temperature higher than the glass transition temperature of the resin contained in the ink composition.

[0334] This invention is not limited to the embodiments described above and can be modified in various ways. For example, this invention includes configurations that are substantially the same as those described in the embodiments, such as configurations with the same function, method, and result, or configurations with the same purpose and effect. Furthermore, this invention includes configurations that replace non-essential parts of the configurations described in the embodiments. Furthermore, this invention includes configurations that achieve the same effect as those described in the embodiments or that can achieve the same purpose. Furthermore, this invention includes configurations incorporating known techniques into the configurations described in the embodiments.

Claims

1. A method for manufacturing a transfer medium, It has a process in which a white ink composition and a glue ink composition are adhered to the same area of ​​a substrate by inkjet printing within the same scan to form a hybrid layer. The white ink composition contains white pigment, resin, and water. The adhesive ink composition contains resin and water. The resin contained in the white ink composition and the resin contained in the adhesive ink composition are different types of resins.

2. The method for manufacturing the transfer medium according to claim 1, wherein, The resin types are selected from polyurethane resin, polyester resin, acrylic resin, olefin resin, fluorene resin, rosin-modified resin, terpene resin, amide resin, epoxy resin, and vinyl chloride resin.

3. The method for manufacturing the transfer medium according to claim 1, wherein, The white ink composition contains a polyurethane resin. The resin contained in the adhesive ink composition is polyester resin.

4. The method for manufacturing the transfer medium according to claim 1, wherein, The process includes a step of forming a non-white image by adhering a non-white ink composition to a substrate using an inkjet printing method. The hybrid layer is formed on the substrate on which the non-white image is formed. The non-white ink composition contains a non-white pigment, resin, and water.

5. The method for manufacturing the transfer medium according to claim 4, wherein, The process includes a step of forming a white image by adhering the white ink composition to the substrate using an inkjet method. The white image is overlapped on the non-white image, and the mixed layer is overlapped on the white image.

6. The method for manufacturing the transfer medium according to claim 4, wherein, The white ink composition contains a polyurethane resin. The resin contained in the adhesive ink composition is polyester resin. The non-white ink composition contains a polyurethane resin.

7. The method for manufacturing the transfer medium according to claim 1, wherein, The invention includes a process for adhering the adhesive ink composition to the substrate by inkjet printing to form an adhesive ink layer. The adhesive ink layers are overlapped and formed on the mixed layer.

8. The method for manufacturing the transfer medium according to claim 1, wherein, The substrate is a film with an ink-receiving layer.

9. The method for manufacturing the transfer medium according to claim 1, wherein, The method for manufacturing the transfer medium includes a step of heating the substrate during the formation of the hybrid layer.

10. The method for manufacturing the transfer medium according to claim 1, wherein, The resin contained in the adhesive ink composition has a glass transition temperature of -50°C or higher and 25°C or lower.

11. The method for manufacturing the transfer medium according to claim 4, wherein, The total attached amount of the white ink composition, the glue ink composition, and the non-white ink composition attached to the substrate is 550 g / m 2 The following.

12. The method for manufacturing the transfer medium according to claim 1, wherein, The total amount of the adhesive ink composition adhering to the substrate is 40 g / m². 2 above.

13. A transfer recording method, comprising: The process of manufacturing the transfer medium using the manufacturing method of claim 1; and The process of heat-transferring the mixed layer onto the fabric by heating the transfer medium with the surface of the mixed layer facing the fabric.

14. The transfer recording method according to claim 13, wherein, The process includes washing the fabric with water at a temperature higher than the glass transition temperature of the resin contained in the ink composition.

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