JP2502684B2 - Dye transfer body - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dye transfer type thermal recording in which a dye on a dye transfer body is transferred to a dyeing layer on an image receptor to form an image. The present invention relates to a dye transfer body for multi-time recording using plural times, especially for multi-time recording by relative speed recording.

Conventional technology Dye transfer type thermal recording using dyes with high sublimation property is a full-color recording method capable of density gradation recording for each recording dot, but it has the drawback of high transfer material cost Attempts are being made. As a report of recording many times, (1) "N-fold mode recording characteristics of sublimation transfer thermal recording medium"
(Proceedings of the 2nd Non-Impact Printing Technology Symposium 1985, pp. 101-104) and (2) "Examination of sublimation type film for multiple recordings" (Proceedings of the 1987 National Conference of the IEICE).

(1) and (2) both relate to the multi-time recording characteristic by the relative speed recording method. A simple repeat method in which the same portion is repeatedly used N times for multiple recording, and an n-fold mode relative speed recording in which the supply speed of the dye transfer material to the image receptor is 1 / n and multiple recording is performed substantially n times. There are two methods. The relative velocity recording method requires some measures for smoothing the transfer between the dye transfer body and the image receiving body, but since the unrecorded portion of the transfer body is always supplied, the actual repetition number is larger than that of the simple repetition method. be able to.

In the case of (1), a recording density of about 1.8 is realized with the number of repetitions n = 12 via spherical spacer particles between the transfer body and the image receiving body. In (2), the transfer member and the image receiving member are closely contacted to each other, and a recording density of about 1.0 is realized when n = 10.

In order to realize full-color image recording equivalent to normal recording (one-time recording), it is necessary to secure a saturation recording density (about 1.5 to 1.8) equivalent to the saturation recording density at the time of normal recording. The condition is that the change in recording density due to the number of repetitions is small for the same recording energy so that the recording history is not affected.

In the conventional example (1), if the amount of dye required for recording many times is sufficiently secured, the above condition is satisfied in terms of recording characteristics. However, since it provides lubricity between the dye transfer body and the image receiving body to enable relative speed running, and at the same time provides a space for limiting the transfer amount by the sublimation process, usable dyes are limited to dyes with high sublimability. To be In the conventional example (2), it is possible to use a highly weatherable dye having a low sublimation property by the contact diffusion transfer. However, even if the dye amount necessary for recording many times is sufficiently secured, the number of repetitions for the same recording energy increases. As a result, the recording density is greatly reduced, and as a result, the saturated recording density obtained when recording many times has not reached a practical level.

On the other hand, a dye transfer body having a coloring material layer on a substrate, which contains at least a highly sublimable dye and a binder, and is configured such that the weight concentration of the dye on the layer surface side is lower than that of the layer substrate side is used. This makes it possible to use the same part of the dye transfer body many times in the contact diffusion transfer.
However, since spherical spacer particles are not used, fusion with the image receptor dyeing layer is likely to occur, and relative velocity recording is difficult. Further, if a lubricant is contained in the color material layer to enable recording at a relative speed, the dye tends to recrystallize on the surface of the color material layer, resulting in insufficient storage stability of the dye transfer body.

The present invention solves the above-mentioned problems, enables relative speed recording, can use a highly practical dye having high weather resistance and low sublimation, and has a small decrease in recording density with an increase in the number of recordings for the same recording energy, It is an object of the present invention to provide a dye transfer material for multiple recording, which can maintain high saturated recording density up to a large number of times and enables full color recording equivalent to normal single recording at a lower running cost.

Means for Solving the Problem In a dye transfer body having a coloring material layer containing a sublimable dye and a binder resin and having a lower dye weight concentration on the layer surface side than the layer substrate side on a substrate, carbon is formed on the coloring material layer surface. The structure has a linear hydrocarbon group of several 12 or more.

Action When no space is provided between the dye transfer body and the image receiving body, the transfer of the dye is governed by the diffusion phenomenon of the dye between the coloring material layer and the dyeing layer. Therefore, focusing on the change in the dye concentration on the surface of the color material layer during the dye consumption process of multiple recordings, since there is no dye concentration gradient inside the color material layer in the initial state in the color material layer by the normal forming method, Sometimes the dye near the surface is consumed, and the dye density on the surface of the color material layer drops to nearly half the density inside the color material layer. From the second time onward, the dye is supplied from the inside due to the concentration gradient inside the color material layer, so the rate of decrease in the dye concentration on the surface of the color material layer becomes very small. Therefore, when the same recording energy is applied, the change in recording density at the time of recording a large number of times greatly decreases from the first time to the second time, and the decrease in recording density thereafter is small. Therefore, in the initial state, the dye weight concentration on the layer surface side is made lower than that on the color material layer base side to give a concentration gradient inside the color material layer, so that the dye is supplied from the inside of the color material layer from the first time. As a result, the sharp drop in the initial recording density, which is accompanied by the sharp drop in the dye density on the surface of the color material layer, is greatly improved. Since the weight concentration of the dye is low near the surface of the color material layer, the heat distortion temperature of the entire matrix of the dye and the binder resin can be kept sufficiently high, and migration of the dye under normal storage conditions can be suppressed. The storage stability of the body can be secured.

Generally, the surface lubricity due to an external lubricant reduces the surface free energy of the plastic by forming a surface molecular layer by the lubricant applied to the surface or transferred from the inside of the plastic to the surface, thereby improving the lubricity. Is believed to give. It is also considered that such a surface molecular layer gives higher lubricity as the degree of crystallinity increases. However, it is considered that when the coloring material layer is heated to a high temperature as in the dye transfer type thermal recording, the crystal part of the surface molecular layer is easily destroyed. Furthermore, if the colorant layer contains a lubricant, migration of the dye within the matrix, which is the colorant layer, tends to occur, and if localization of the lubricant occurs, the dye recrystallizes on the surface via the site. To do Therefore, by directly introducing a linear hydrocarbon group having 12 or more carbon atoms into the binder resin constituting the coloring material layer by a chemical reaction, the dye migration inside the coloring material layer is not affected, and the surface It is possible to provide a surface of the coloring material layer having slipperiness that does not easily cause the molecular layer to break, and it becomes possible to record the relative velocity.

EXAMPLES The present invention will be specifically described.

In the "dye transfer member having at least a coloring material layer containing a dye and a binder and having a lower dye weight concentration on the layer surface side than the layer substrate side on the substrate", a color for specifically realizing the dye concentration distribution As the material layer forming method, (1) a method of forming a color material layer by sequentially laminating a plurality of layers having different dye weight concentrations on a substrate from the higher concentration, and (2) forming a color material layer on the substrate There is a method of forming a color material layer by providing a color material layer including at least a dye and a binder and then removing the dye near the surface of the color material layer.

Regarding (2), specifically, a) a method in which a resin thin film is adhered to the surface of the color material layer and the resin layer is removed after transfer by heating, and b) a solvent in which the dye is soluble and the binder is insoluble. There is a method of dissolving and removing the dye on the surface of the color material layer.

FIG. 1 shows a configuration example. The transfer body 1 is one in which a color material layer 3 having a lower dye weight concentration on the layer surface side than on the layer substrate side is formed on a transfer substrate 2. Further, the image receiving body 4 is such that the dyeing layer 6 is provided on the image receiving substrate 5.

In (1), it is preferable to stack several layers to give a concentration gradient to the entire inside of the color material layer, but the two-layer structure that is the easiest to manufacture, that is, a high-concentration dye layer containing at least a dye, and the weight of the dye in the layer Even in a dye transfer body in which a dye-permeable low-concentration layer having a lower concentration than the high-concentration layer is sequentially laminated on a substrate to form a color material layer, it is possible to greatly improve the change in initial recording density when recording many times. It is possible enough. In the two-layer structure,
In order to suppress the initial change in recording density, it is more preferable to set the weight concentration of the dye-permeable low concentration layer to 1/2 or less of the weight concentration of the dye high concentration layer. The thickness of the dye permeable low concentration layer can be adjusted to the most effective thickness by the ratio of the dye concentration of the dye permeable low concentration layer to the dye concentration of the dye high concentration layer. When the ratio is high, the thickness can be adjusted by thickening it, and when it is low, it can be adjusted by thinning it. When the dye density of the dye-permeable low density layer is close to zero, it is preferably 1 μm or less. Further, in the two-layer structure, the dye-permeable low-concentration layer can be provided with the protective function of the dye high-concentration layer during long-term storage. It is possible to set the content to 50% by weight or more, which makes it possible to efficiently retain a large amount of dye on the dye transfer body. Also, since the dye is retained at a high concentration, it is possible to record more times. Since the dye density inside the color material layer can be kept high, high density recording with little change in recording density can be performed up to many times of recording. In addition, in order to form the dye-permeable low-concentration layer in the two-layer structure with less interference with the dye high-concentration layer, a water-soluble or water-dispersible resin can be used.

FIG. 2 shows a configuration example. The transfer body 1 is a color material layer 3 in which a high dye concentration layer 9 and a low dye permeable concentration layer 10 are sequentially laminated on a transfer substrate 2.

 Next, the principle of the relative speed method is shown in FIG.

The transfer body 1 and the image receiving body 4 are pressed against the thermal head 8 by the platen 7 so that the coloring material layer and the dyeing layer come into close contact with each other. The transfer body 1 travels at v / n (n = 1, 2, ...) With respect to the speed v of the image receiving body 4 with respect to the thermal bed 8. The traveling direction of the transfer body may be the same as or opposite to the traveling direction of the image receiving body. However, since the transfer body is heated by the thermal head, fusion between the transfer material color material layer and the image receptor dyeing layer is likely to occur, and at least one of the color material layer and the dyeing layer needs to have sufficient lubricity. .

Therefore, a method for forming the "dye transfer member having a linear hydrocarbon group having 12 or more carbon atoms on the surface of the color material layer" will be described.

As a method of forming such a surface state, (1) a linear hydrocarbon group having 12 or more carbon atoms is chemically reacted with the surface of the coloring material layer on which the dye concentration distribution is formed by the method described in (1) above. (2) After providing a coloring material layer comprising at least a dye and a binder on the substrate, a linear hydrocarbon group having 12 or more carbon atoms is introduced into the surface of the coloring material layer by a chemical reaction. Then, the coloring material layer is formed by further removing the dye near the surface of the coloring material layer.

In the case of the method (1), when a method of sequentially stacking a high dye concentration layer and a low dye permeable layer as a method for forming a dye concentration distribution, a reactive functional group is provided at least in the low dye permeable layer. There is a method in which a resin contained therein is chemically reacted with a linear hydrocarbon derivative having a functional group capable of reacting with the reactive functional group and having 12 or more carbon atoms to introduce it into the surface.

FIG. 4 shows a configuration example. The transfer body 1 has a color material layer 3 having a linear hydrocarbon group 11 having 12 or more carbon atoms on the surface of a transfer substrate 2.

The specific materials used in the present invention will be described below.

Examples of the pigment include a disperse pigment, a basic dye, and a basic dye dye former.

The heating source required for transfer is a thermal head, energizing method,
Heat mode heating with a laser is not particularly limited, and therefore various substrates can be used for the dye transfer body and the image receiving body depending on the application. For example, as a substrate of a dye transfer body for a thermal head, polyethylene terephthalate, polyethylene naphthalate, ester type polymers such as polycarbonate, amide type polymers such as nylon, acetyl cellulose, cellulose derivatives such as cellophane, polyimide, polyamide imide, poly There is an imide polymer such as ether imide, and a heat-resistant layer or a slipping layer is provided on the surface of the substrate that directly contacts the thermal recording head, if necessary. Further, in order to carry out energization recording and induction heating recording, a film obtained by imparting conductivity to the above materials is used.

The binder resin forming the color material layer is not particularly limited, but polyester resin, butyral resin, nylon resin, polycarbonate resin, urethane resin, chlorinated polyethylene, chlorinated polypropylene, (meth) acrylic resin, polystyrene resin, Examples thereof include AS resin, polysulfone resin, polyphenylene oxide, and cellulose derivative, which are selected and used in combination according to the required properties. When the coloring material layer is formed by laminating a high dye concentration layer and a dye permeable low concentration layer, it is used as a binder resin for the high dye concentration layer or as a part of the binder resin for the high dye concentration layer. Will be done.

Solvents used to prepare the ink for forming the color material layer include alcohols such as methanol, ethanol, propanol, butanol, methyl cellosolve, cellosolves such as ethyl cellosolve, benzene, toluene, aromatics such as xylene, Esters such as butyl acetate, ketones such as acetone, 2-butanone and cyclohexanone, nitrogen compounds such as N, N-dimethylformamide, halogenated hydrocarbons such as dichloromethane, chlorobenzene and chloroform can be used. Further, as a method of applying the ink on the substrate, a reverse roll coater, a gravure coater, a rod coater, an air doctor coater, or the like can be used (Yuji Harasaki, Maki Shoten, 1979, "Coating method". )).
The method of applying the coating liquid is the same for the case of stacking a high dye concentration layer and a dye permeable low concentration layer.

When the coloring material layer is formed by stacking a high-density dye layer and a low-density dye-permeable layer, the thickness of the high-density dye layer is the concentration of the dye in the high-density dye layer, the target number of recordings or the relative speed ratio, and the necessary Although it depends on the amount of dye required on the image receptor to obtain the highest recording density, it is preferable to secure the dry coating weight given by the following formula at a minimum.

Minimum dry coating weight (g / m ² ) = (target number of recordings) × (required dye amount g / m ² ) / (dye weight concentration) The binder resin used for the dye permeable low concentration layer is the color material layer. Water-soluble resins and water-dispersible resins can be used in addition to the resins that can be used for, and examples thereof include polyvinyl alcohol, poly (meth) acrylic acid (a metal salt is also possible), polyacrylamide, and water-based urethane resin. , Water-based acrylic resin, water-based polyester resin, etc. (refer to “Recent Processing and Modification Technology of Water-Soluble Polymer Water-Dispersible Resin and Application Development Comprehensive Technical Data Collection”, Management Development Center Publishing, 1981).

As the solvent used for preparing the ink in the case of forming the dye-permeable low-concentration layer with the above water-soluble resin or water-dispersible resin, alcohols, ketones, cellosolves, etc. may be added in addition to water. good. When emulsifying the lubricant,
It goes without saying that it is possible to add an appropriate emulsifying agent or to add a surface-active agent to reduce the surface tension of the coating liquid.

The thickness of the dye-permeable low-concentration layer can be adjusted according to the dye diffusion rate of the resin used, the dye concentration, the energy required for target recording, the number of recordings, or the relative speed ratio n in relative speed recording. Is the number of recordings or n
Is about several tens, a thickness of about 0.1 to 1 μm is appropriate.

As a method of allowing the colorant layer surface to have a linear hydrocarbon group having 12 or more carbon atoms, the colorant layer contains a resin containing at least a reactive functional group, and a functional group reactive with the reactive functional group. There is a method of reacting with a straight chain hydrocarbon derivative having 12 or more carbon atoms. Such a reaction is not particularly limited, but a reaction that proceeds at room temperature without a catalyst is preferable, 1) a reaction between a hydroxyl group and an acid chloride, 2) a reaction between a hydroxyl group and a silane coupling agent, and 3) a glycidyl group. Examples thereof include reactions of amines.

Next, the resin containing a reactive functional group contained in the color material layer will be described. Resins having a hydroxyl group and a glycidyl group are preferable because acid chloride, silane, amine, etc. become a problem when they remain unreacted. Examples of such a resin include a polymer whose monomer unit is vinyl alcohol or glycidyl (meth) acrylate, and a polyester resin having a hydroxyl group at the terminal. However, if the number of reactive functional groups does not exist to some extent, the density of the linear hydrocarbon group having 12 or more carbon atoms that can be introduced is small on the surface, and the effect of lubricity cannot be sufficiently exhibited. Depending on the ratio of the resin present on the surface of the color material layer other than such a resin, the monomer unit is a polymer of vinyl alcohol or glycidyl (meth) acrylate, and the monomer is 30 mol%.
The resin contained above is preferable. In order to make it exist in the color material layer, it may be applied by dissolving it in the ink for forming the color material layer in the same manner as other binder resins.

Next, a linear hydrocarbon derivative having a functional group that reacts with the reactive functional group and having 12 or more carbon atoms will be described. Such a compound may have a linear hydrocarbon group having 12 or more carbon atoms and an acid chloride, chlorosilane, an alkoxysilane, or an amino group, but is preferably lauryl chloride, stearyl chloride, Consists of linear hydrocarbon groups with 12 or more carbon atoms such as erucic acid chloride, oleic acid chloride, lauryl trichlorosilane, stearyl trichlorosilane, laurylamine, stearylamine or oleylamine, and acid chlorides, chlorosilanes, alkoxysilanes, or amino groups only. It is a linear hydrocarbon derivative.

Furthermore, a specific method of introducing the above-mentioned materials to the surface of the color material layer will be described. First, after forming a color material layer containing a resin containing a reactive functional group, a solution in which the linear hydrocarbon derivative is dissolved is applied to the surface of the color material layer by a spray method, a gravure coating method or the like and dried. Good. As the solvent, those which do not dissolve the color material layer (for example, hexane, octane, etc.) are preferable. A monomolecular film may be formed on the surface by the LB method. The linear hydrocarbon derivative coated on the surface of the color material layer by these methods reacts with the reactive functional group present on the surface of the color material layer and is immobilized only by leaving it to stand for an appropriate time. If necessary, the surface of the color material layer may be washed with a solvent that does not dissolve the color material layer in order to remove unreacted materials and by-products that remain on the surface.

 The image receptor is usually composed of an image receiving substrate and a dyeing layer.

As the image-receiving substrate, various films such as polyester are usually used as a transparent substrate, and synthetic paper or coated paper mainly made of polyester, polypropylene or the like is used as a white substrate depending on the purpose.

Examples of the dyeing substance used in the dyeing layer include polyester, polyamide, acrylic resin, acetate resin, various cellulose derivatives, starch, polyvinyl alcohol, and the like, and further, as the curable resin, acrylic acid, acrylic acid ester, polyester, polyurethane, There are cured products such as polyamide, acetate, etc. by heat, light, electron beams, etc., which are selected and used in combination as necessary.

 The effects of the present invention will be described below with reference to specific examples.

As the substrate of the dye transfer body, an aromatic polyamide film (6 μm thick) provided with a heat resistant slipping layer was commonly used. PET white synthetic paper is used as the base of the image receptor,
UV-curable resin (Showa Highpolymer Co., Ltd. SP5003) 10
g, sensitizer (Nippon Ciba Geigy Co., Ltd. Irgacure 184)
0.1g, amide modified silicone oil (KF, Shin-Etsu Chemical Co., Ltd.)
3935) Apply a coating solution of 0.05g dissolved in 10g of toluene with a wire bar, dry with hot air, and irradiate ultraviolet rays with a 1kW high-pressure mercury lamp for 1 minute to cure it to form a dyeing layer to form an image receptor. did. The used dye has the following structural formula.

A thermal head is used as the recording means, and the recording conditions are as follows: Recording cycle 16.7ms / l Recording pulse width MAX4.0ms Resolution 6l / mm Recording energy 6J / cm ² Transfer body traveling speed 1.0mm / s Image receiving body traveling speed 10.0mm Based on / s.

<Example 1> An ink prepared by dissolving 2 g of the dye having the above structural formula and 2 g of butyral resin (Sekisui Chemical Co., Ltd. S-REC BX-1) as a binder resin in a mixed solvent of 21 g of toluene and 9 g of MEK on a substrate was used with a wire bar. It was applied so that the dry coating weight would be 3 g / m ² and dried to provide a dye high-concentration layer. Partially saponified polyvinyl alcohol (Kuraray Poval Co., Ltd.) 1 g dissolved in 20 g of water is applied with a wire bar to a dry coating weight of 0.15 g / m ² and dried to give a dye permeable low concentration layer. Was provided as a color material layer. Further, a solution prepared by dissolving 1 g of stearic acid chloride in petroleum benzine was applied by hand spraying until the surface of the color material layer was sufficiently wet and dried. After standing for 1 minute, the surface was wiped with a non-woven fabric impregnated with petroleum benzine to remove by-products. This was used as a dye transfer body.

<Example 2> After providing a dye high concentration layer in the same manner as in Example 1, 45%
Saponified polyvinyl alcohol 1g 7.5g water, 7.5g ethanol
The coating liquid dissolved in the mixed solvent of was applied so that the dry coating weight would be 0.2 g / m ² and dried to provide a dye-permeable low-concentration layer to form a coloring material layer. 1g of lauryl trichlorosilane
Was dissolved in 100 g of octane by hand spraying until the surface of the color material layer was sufficiently wet, and dried. After standing for 1 hour, the surface was wiped with a non-woven fabric impregnated with petroleum benzine to remove by-products. This was used as a dye transfer body.

<Example 3> After a dye high-concentration layer was provided in the same manner as in Example 1, 1 g of a copolymer of methyl acrylate and glycidyl methacrylate (copolymerization molar ratio 1: 4) was dissolved in 20 g of toluene to prepare a coating solution. A dry coating weight of 0.8 g was quickly applied and dried to obtain a dye-permeable low-concentration layer. 1g oleylamine
Was dissolved in 100 g of ethanol and applied by hand spraying until the surface of the color material layer was sufficiently wet, and dried. After standing for 2 days, the surface was wiped with a non-woven fabric impregnated with ethanol to remove unreacted substances and the like. This was used as a dye transfer body.

<Comparative Example 1> A dye high-concentration layer and a dye-permeable low-concentration layer were provided in the same manner as in Example 1 to obtain a dye transfer body.

Comparative Example 2 A water-soluble polyester resin (Nippon Gosei Kagaku Co., Ltd. Eposter WR) was provided after a dye high concentration layer was provided in the same manner as in Example 1.
901) 1 g and 0.05 g of a fluorine-containing surfactant (Dainippon Ink and Chemicals Megafac F812) dissolved in 20 g of water are applied to a dry coating weight of 0.2 g / m ² and dried. As a dye-permeable low-concentration layer. 1 g of paraffin wax with a melting point of 50 ° C
Is a coating solution prepared by dissolving 50 g of toluene in a dry weight of 0.05 g / m
^It was applied so as to be ² and dried to obtain a dye transfer body.

The dye transfer material as described above was subjected to recording under the above-mentioned conditions, and whether or not relative velocity recording was possible was examined. The results are shown in Table 1 and FIG.

In FIG. 5, the change of the recording density at the same recording energy in the simple repeating system multiple recording = the recording density of the Nth recording / the recording density of the first recording (%) was measured.

However, the recording energy indicates the energy at which the recording density becomes about 1.8. The unit is J / cm ² * Paraffin wax was transferred to the surface of the image receptor and the image quality was extremely poor.

EFFECTS OF THE INVENTION According to the present invention, relative speed recording is possible, and a rapid decrease in the dye concentration on the surface of the color material layer due to the increase in the number of repetitions in the multiple recording is suppressed, and the decrease in recording concentration is greatly improved. It

As a result, a highly weatherable and sublimable dye having high practicality can be used, a decrease in recording density due to an increase in the number of recordings for the same recording energy is small, and a high saturated recording density can be maintained up to a large number of times. It is possible to obtain a multiple-time recording dye transfer body that enables full-color recording equivalent to normal single-time recording at a lower running cost.

[Brief description of drawings]

1, 2, and 4 are cross-sectional views of a dye transfer member in an embodiment of the present invention, FIG. 3 is a principle diagram of multiple recording in a relative speed recording system, and FIG. FIG. 6 is a diagram showing a multi-time recording density characteristic in the example. 1 ... Transfer material, 3 ... Color material layer, 4 ... Image receiving material, 6 ... Dyeing layer, 9 ... Dye high concentration layer, 10 ... Dye permeable low concentration layer, 11 ... Carbon number 12 The above linear hydrocarbon groups.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Imai 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Nobuyoshi Taguchi 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-60-83889 (JP, A)

Claims (5)

(57) [Claims] 1. At least a sublimable dye and a binder resin are included,
In a dye transfer body having a coloring material layer having a low dye weight concentration on the substrate surface side from the layer substrate side on the substrate, the coloring material layer contains a resin containing at least a reactive functional group, and the reactive functional group is A dye transfer body having a linear hydrocarbon group having 12 or more carbon atoms on the surface of a color material layer by reacting with a linear hydrocarbon derivative having 12 or more carbon atoms and having a functional group that reacts with it. 2. A dye transfer comprising a high-concentration dye layer containing at least a dye and a low-concentration dye-permeable layer having a dye concentration lower than that of the high-concentration layer, which are sequentially laminated on a substrate to form a coloring material layer. In the body, at least the dye-permeable low-concentration layer contains a resin containing a reactive functional group, and the reactive functional group reacts with a linear hydrocarbon derivative having 12 or more carbon atoms having a functional group that reacts with the resin. As a result, the carbon number on the surface of the color material layer is 12
The dye transfer body according to claim 1, which has the above linear hydrocarbon group. 3. A linear hydrocarbon derivative having 12 or more carbon atoms, wherein the color material layer contains a resin having a hydroxyl group or a glycidyl group as a reactive functional group, and the functional group reacts with the reactive functional group. The dye transfer material according to claim 1, which is an acid chloride or (tri- or di) chloro (or alkoxy) silane or amine having a linear hydrocarbon group having 12 or more carbon atoms. 4. The dye transfer body according to claim 1, which contains a resin containing 30 mol% or more of vinyl alcohol or glycidyl (meth) acrylate as a monomer unit as the resin containing a reactive functional group. . 5. A straight-chain hydrocarbon derivative having a functional group that reacts with a reactive functional group and having 12 or more carbon atoms is lauryl chloride, stearyl chloride, erucic chloride, oleic chloride, lauryl trichlorosilane, stearyl. Trichlorosilane, laurylamine,
The dye transfer body according to claim 1, which is stearylamine or oleylamine.