JP2005238646A - Combination of ink sheet and ink image receiving sheet, and printed matter using this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combination of an ink sheet and an ink image receiving sheet which has an enough adhesiveness to a substrate such as paper or plastic, and can form a printed matter excellent in durability, reliability and security. <P>SOLUTION: In the combination of the ink sheet comprising an ink layer and a thermal transfer adhesive layer, and the ink image receiving sheet applied on the ink sheet, at least one kind of the same resin is incorporated in the ink layer, the thermal transfer adhesive layer, and the ink image receiving sheet. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a thermal transfer recording technique, and in particular, an ink sheet is selectively heated to form an ink image on the ink image-receiving sheet, and an adhesive layer is formed on the ink image. The present invention relates to a technique for obtaining a printed matter by bonding to a sheet.

  Examples of a method for recording a face image on a personal authentication medium such as a license, an employee's card, a membership card, or a credit card include a sublimation type thermal transfer recording method and a melt type thermal transfer recording method.

  In the sublimation thermal transfer recording method, a sublimation ink sheet obtained by coating a support sheet with a sublimation or heat transferable dye so that heat transfer is possible and an ink image receiving layer made of a thermoplastic resin capable of receiving the sublimation dye are superimposed. Using a thermal head or the like, a sublimable ink sheet can be selectively heated based on predetermined image data, and a desired image can be sublimated and recorded on a recording medium. According to this method, it is widely known that a color image rich in gradation can be easily recorded. However, in the sublimation type thermal transfer recording method, an image is formed in the vicinity of the surface of the thermoplastic resin layer, so that the image is easily scratched, the dye is resublimated and the image density is easily lowered with time. Have various problems related to the durability of the image, such as a change in color tone of the image.

  On the other hand, the melt-type thermal transfer recording method uses an ink sheet obtained by coating a hot melt ink obtained by dispersing a pigment or dye in a hot melt binder such as resin or wax on a support sheet. Then, this is selectively heated using a thermal head or the like based on predetermined image data, and the heat-meltable ink is transferred to the recording medium together with the binder to record a desired image. According to this method, it is possible to select inorganic and organic pigments having sufficiently better light resistance than sublimable ink. Further, by devising a resin, wax, or the like used for the binder, it is possible to provide an image that is hardly scratched and has excellent solvent resistance. In addition, functional materials such as fluorescent pigments and magnetic materials can be mixed in the heat-meltable ink, whereby a special ink with high security can be obtained. In the case of the sublimation thermal transfer recording method, it is necessary to use a combination of the recording medium and an ink image-receiving layer suitable for the sublimation ink. In the melt type thermal transfer recording method, the surface of the recording material has adhesiveness to the binder. Any medium can be used, and a wide variety of recording media can be selected. However, the melt-type thermal transfer recording method basically uses ink adhesion and uses a dot area gradation method in which gradation recording is performed by changing the size of the transferred dots. There is a disadvantage that the gradation is poor because the unevenness of the ink is very sensitive, and the unevenness causes a transfer failure and the dot size cannot be controlled well.

  Further, a common problem in the sublimation type thermal transfer recording method and the melt type thermal transfer recording method is that the adhesive force of the ink layer and the image receiving layer to the transfer target is sufficient, and if this adhesive force is insufficient, Reduces the durability, reliability, and security of the printed material on which the image is recorded.

  Therefore, it is known to provide an adhesive layer as a method for improving the adhesive force of the ink layer and the image receiving layer to the transfer target. However, even if an adhesive layer is provided, when using a transfer medium having a large surface roughness such as paper, it is necessary to increase the thickness of the adhesive layer in order to maintain sufficient adhesion. In particular, when the material to be transferred is a paper with a watermark, it is difficult to maintain the adhesiveness of the stepped portion of the watermark, and it is necessary to further increase the thickness of the adhesive layer.

  Generally, the thermal transfer ink sheet is applied by gravure printing, and the coating thickness is preferably about 2 μm or less in order to apply the surface uniformly. Considering cost and apparatus simplification when creating a printed matter using the above-described thermal transfer recording method, a thermal transfer ink sheet in which an adhesive layer is formed on the same support as the ink layer in a surface sequential manner is used. It is desirable. However, in gravure printing, since there is a limit to the coating thickness, it is difficult to obtain a sufficient thickness of the adhesive layer. Therefore, it is difficult to form the adhesive layer on the same support as the ink layer.

In order to solve the above problem, there is a method in which an adhesive layer is printed twice or more (see, for example, Patent Document 1). According to this method, in the heat-sensitive transfer ink sheet, when the adhesive layer is formed in the surface sequence with the ink layer, the length of the adhesive layer in the longitudinal direction is set to be at least twice the effective screen length, and the adhesive layer is 2 By stacking more than once, the thickness of the adhesive layer can be obtained. However, when the length of the adhesive layer is increased, there arises a problem of an increase in cost due to an increase in the adhesive layer ink coating liquid, an increase in the support sheet, an increase in coating time, and the like. In addition, there is a problem that the performance of the apparatus is deteriorated, such as an increase in the size of the apparatus by increasing the winding diameter when the sheet is rolled, or a delay in the production speed by printing the adhesive layer twice or more. there were.
JP 2001-205948 A

  A first object of the present invention is an ink sheet and an ink image-receiving sheet that have good adhesion to a substrate such as paper or plastic, and can form a printed matter having excellent durability, reliability, and security. There is to get a combination with.

  A second object of the present invention is to provide a printed material having good adhesion between a substrate, an ink image and an ink image-receiving sheet, and having excellent durability, reliability and security.

  The present invention is first applied to the support, the heat-meltable ink sheet formed on the support and including the heat-meltable ink layer and the heat-sensitive transfer adhesive layer, and the heat-meltable ink sheet. A combination with a heat-meltable ink image-receiving sheet, wherein the heat-meltable ink layer, the heat-sensitive transfer adhesive layer, and the heat-meltable ink image-receiving sheet contain at least one same resin. A combination of a hot-melt ink sheet and a hot-melt ink image-receiving sheet is provided.

  Secondly, the present invention provides a substrate, a heat-sensitive transfer adhesive layer provided on the substrate, a heat-meltable ink image layer provided on the heat-sensitive transfer adhesive layer, and the heat-meltable ink image. A printed matter comprising a heat-meltable ink image-receiving layer provided on a layer, wherein the heat-sensitive transfer adhesive layer, the heat-meltable ink image layer, and the heat-meltable ink image-receiving layer have at least one same resin Is included, and a hot-melt ink print is provided.

  Thirdly, the present invention provides a sublimation ink sheet comprising a support, a sublimation ink layer formed on the support, and a heat-sensitive transfer adhesive layer, and a sublimation ink image applied to the sublimation ink sheet. A sublimation ink sheet and a sublimability, wherein the sublimation ink layer, the heat-sensitive transfer adhesive layer, and the sublimation ink image-receiving sheet contain at least one same resin. A combination with an ink image-receiving sheet is provided.

  Fourth, the present invention provides a substrate, a heat-sensitive transfer adhesive layer provided on the substrate, a sublimable ink image layer provided on the heat-sensitive transfer adhesive layer, and the sublimable ink image layer. A sublimable ink image-receiving layer provided on the printed material, wherein the heat-sensitive transfer adhesive layer, the sublimable ink image layer, and the sublimable ink image-receiving layer contain at least one same resin. The present invention provides a sublimable ink print characterized by the above.

  When the present invention is used, the adhesiveness between the substrate, the ink image and the ink image-receiving sheet is improved by the thermal transfer recording technique, and a printed matter having excellent durability, reliability and security can be obtained.

  The combination of the heat-meltable ink sheet and the heat-meltable ink image-receiving sheet of the present invention includes a support, a heat-meltable ink layer formed on the support, and a heat-meltable ink sheet including a heat-sensitive transfer adhesive layer. A heat-meltable ink image-receiving sheet applied to the heat-meltable ink sheet, and the heat-meltable ink layer, the heat-sensitive transfer adhesive layer, and the heat-meltable ink image-receiving sheet contain at least one same resin. To do.

  The heat-meltable ink printed matter of the present invention comprises a base material, a heat-sensitive transfer adhesive layer provided on the base material, a heat-meltable ink image layer provided on the heat-sensitive transfer adhesive layer, and a heat-meltable ink image. The heat-meltable ink image-receiving layer provided on the layer and the heat-sensitive transfer adhesive layer, the heat-meltable ink image layer, and the heat-meltable ink image-receiving layer contain at least one same resin.

  The hot-melt ink printed matter of the present invention can be formed using a combination of the above-described hot-melt ink sheet and hot-melt ink image-receiving sheet. For example, a heat-meltable ink layer of a heat-meltable ink sheet is brought into contact with the heat-meltable ink image-receiving sheet, and selectively heated from the support side to form a heat-meltable ink image layer on the image-receiving sheet. A heat-sensitive transfer adhesive layer is formed on the substrate in the same manner, and then the heat-sensitive transfer adhesive layer is applied in contact with the substrate together with the image-receiving sheet on which the heat-meltable ink image layer is formed. A printed matter can be formed.

  The combination of the sublimation ink sheet and the sublimation ink image-receiving sheet of the present invention comprises a sublimation ink sheet including a support, a sublimation ink layer formed on the support, and a heat-sensitive transfer adhesive layer. A sublimable ink image-receiving sheet applied to the ink sheet, and the sublimable ink layer, the thermal transfer adhesive layer, and the sublimable ink image-receiving sheet contain at least one same resin.

  The sublimation ink printed material of the present invention is provided on a substrate, a heat-sensitive transfer adhesive layer provided on the substrate, a sublimation ink image layer provided on the heat-sensitive transfer adhesive layer, and a sublimation ink image layer. The heat-sensitive transfer adhesive layer, the sublimation ink image layer, and the sublimation ink image-receiving layer contain at least one same resin.

  The sublimation ink printed matter of the present invention can be formed using a combination of the above-described sublimation ink sheet and sublimation ink image-receiving sheet. For example, a sublimation ink layer of a sublimation ink sheet is brought into contact with the sublimation ink image receiving sheet, and selectively heated from the support side, thereby forming a sublimation ink image layer on the image receiving sheet, and thermal transfer thereon. An adhesive layer is formed in the same manner, and then a heat-sensitive transfer adhesive layer is applied to the substrate together with the image-receiving sheet on which the sublimable ink image layer is formed, and a printed matter can be formed by heating and pressure bonding. .

  Here, the same resin refers to a resin having the same average molecular weight or glass transition point in which the polymerizable monomer and the polymer material such as the low molecular weight polymer are the same.

  According to the present invention, the same resin is used for the heat-sensitive transfer adhesive layer, the heat-meltable ink layer, and the heat-meltable ink image-receiving sheet, and the heat-sensitive transfer adhesive layer, the heat-meltable ink image layer, and the heat-meltable ink image-receiving layer. By using the same resin, when these layers are heated and pressure-bonded, the cohesive force is increased, and good adhesiveness is obtained.

  By using the same resin for the heat-sensitive transfer adhesive layer, the sublimation ink layer, and the sublimation ink image-receiving sheet, or by using the same resin for the heat-sensitive transfer adhesive layer, the sublimation ink image layer, and the sublimation ink image-receiving layer, these When the layer is heated and pressure-bonded, the sublimable dye contained in the sublimable ink can be strongly dyed to the sublimable ink image-receiving layer. Thereby, image degradation due to ultraviolet rays can be improved, and light resistance can be further improved.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  FIG. 1 is a plan view showing an example of the hot-melt ink sheet used in the present invention, and FIG. 2 is a cross-sectional view of FIG.

  As shown in the figure, the heat-meltable ink sheet 10 includes a support 3 and a heat-meltable ink layer 1 and a heat-meltable ink layer 1 containing, for example, a vinyl chloride-vinyl acetate copolymer resin provided thereon. The adhesive layer 2 containing the same resin as the resin contained in is provided. The heat-meltable ink layer 1 and the adhesive layer 2 are separately applied in the surface direction in the longitudinal direction. Here, as the heat-meltable ink layer 1, for example, a yellow ink layer 11 and a magenta ink layer are illustrated as illustrated. 12, three colors of cyan ink layer 13 can be provided. In addition, although not shown, a black ink layer can be formed alone, or a fourth layer such as a fluorescent ink layer, a black ink layer, or the like can be added in addition to the three-color layers 11, 12, and 13. Is possible. Further, as shown in the drawing, a back layer 4 for heat resistant slipping can be provided on the opposite surface of the main surface of the support 3 to the surface on which the ink layer 1 and the adhesive layer 2 are provided. .

  Here, the hot-melt ink sheet has been described, but the sublimation ink sheet is, for example, a sublimation ink layer containing, for example, an acrylic resin instead of the hot-melt ink layer 1, and a sublimation ink instead of the adhesive layer 2. 1 and 2 can be used except that an adhesive layer containing the same resin as the layer is used.

  FIG. 3 is a cross-sectional view showing an example of the heat-meltable ink image-receiving layer transfer sheet used in the present invention.

  As shown in the figure, this heat-meltable ink image-receiving layer transfer sheet 20 is a heat-meltable ink image-receiving material containing the same resin as the resin contained in the support 8 and the heat-meltable ink layer 1 of FIG. Layer 5. In the case where the support 8 and the heat-meltable ink image receiving layer 5 are peeled and used, a peeling layer (not shown) can be provided between these layers. Moreover, when using it without peeling between the support body 8 and the image receiving sheet 20, the easily bonding layer which is not shown in figure between these layers can also be provided. Further, in the case where the support 8 and the heat-meltable ink image-receiving layer 5 are peeled and used, a surface protective layer (not shown) may be provided between these layers.

  Here, the heat-meltable ink image-receiving layer transfer sheet has been described. However, the sublimable ink image-receiving layer transfer sheet has a sublimable ink image-receiving layer containing the same resin as the sublimable ink layer in place of the heat-meltable ink image-receiving layer 5. Except for the provision, it may have the same configuration as FIG.

  Examples of the resin used in the heat-meltable or sublimable ink layer, heat-sensitive transfer adhesive layer, and heat-meltable or sublimable ink image-receiving sheet used in the present invention include acrylic resins, ethylene-vinyl acetate copolymers, poly Examples thereof include vinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl acetate resin, polyester resin, polyamide resin, and silicone resin. These resins can be used alone or in combination of two or more.

  The number average molecular weight is preferably 5000 to 200000 and more preferably 7000 to 90000. If the number average molecular weight is less than 5000, the dot shape and gradation of the formed image tend to deteriorate, and if it exceeds 200000, sufficient adhesive strength can be secured in the printed matter after being transferred to the transfer medium. There is a tendency to disappear.

  The glass transition point is preferably 20 ° C. to 120 ° C., more preferably 50 ° C. to 90 ° C. If the glass transition point is less than 20 ° C., the storage stability in a high temperature environment tends to deteriorate, and if it exceeds 120 ° C., the dot shape and gradation of the formed image tend to deteriorate. .

  FIG. 4 is a cross-sectional view illustrating an example of the configuration of the printed material according to the present invention.

  As shown in the figure, this printed matter 30 includes, for example, an adhesive layer 2, a heat-meltable ink image layer 7 formed with a heat-meltable ink, and a heat-meltable ink image-receiving layer 5 on a substrate 6 made of paper. Have.

  In forming the heat-meltable ink image layer 7 on the heat-meltable ink image-receiving layer 5, the heat-transferable ink image-receiving layer and the ink surface of the heat-transferable ink sheet face each other, and heat transfer recording is performed using a heating means such as a thermal head. Can be done. Further, the heat-sensitive transfer adhesive layer 9 of the heat-meltable ink sheet is opposed to the formed heat-meltable ink image layer 7 and similarly selectively applied by a heating means such as a thermal head to thereby apply the heat-sensitive transfer adhesive layer 9. Can be transferred onto the hot-melt ink image layer 7. Thereafter, the heat-sensitive transfer adhesive layer 9 and the substrate 6 such as paper are opposed to each other, and passed through, for example, a heat roller that can apply heat and pressure at the same time, thereby heating the heat-meltable ink image-receiving layer as a whole, Alternatively, for example, by selectively heating in a desired pattern with a hot stamping machine or the like, the heat-meltable ink image-receiving layer can be thermally bonded on the substrate in whole or in part. Then, a printed material is obtained by peeling the support.

Hereinafter, the present invention will be specifically described with reference to examples.

Example 1
Preparation of heat-meltable ink image-receiving sheet A 25 μm-thick transparent polyester film with an easy-adhesion layer formed in advance was prepared as a support, and a heat-meltable ink image-receiving layer coating liquid having the following composition was applied to the surface of the easy-adhesion layer. Using a gravure coater, the coated film thickness after drying is applied to 3 μm, heated and dried at 120 ° C. for 2 minutes to form a heat-meltable ink image-receiving layer, and a heat-meltable ink image-receiving sheet Got.

Heat-meltable ink image-receiving layer coating solution Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Vinyl chloride-vinyl acetate copolymer (VMCA manufactured by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 20 parts by weight of heat-meltable ink sheet Preparation A transparent polyester film having a thickness of 4.5 μm was prepared, and a back layer made of a silicone resin was formed on one side thereof so as to have a dry coating thickness of 0.3 μm. Next, on the other side of the polyester film, three colors of heat-meltable ink layer coating solution having the following composition and an adhesive layer coating solution were applied in the surface order, heated and dried at 140 ° C. for 1 minute, A three-color heat-meltable ink layer and an adhesive layer were formed to obtain a heat-meltable ink sheet. The coating thickness after drying the ink layer was 0.6 μm, and the coating thickness after drying the adhesive layer was 1 μm.

Hot melt ink layer coating liquid (yellow)
Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Yellow pigment 12 parts by weight Vinyl chloride-vinyl acetate copolymer (VMCA made by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 8 parts by weight Hot melt ink layer coating liquid (magenta )
Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Magenta pigment 12 parts by weight Vinyl chloride-vinyl acetate copolymer (VMCA made by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 8 parts by weight Hot melt ink layer coating liquid (cyan )
Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Cyan pigment 12 parts by weight Vinyl chloride-vinyl acetate copolymer (VMCA manufactured by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 8 parts by weight Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Vinyl chloride-vinyl acetate copolymer (VMCA manufactured by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 20 parts by weight The heat-meltable ink image-receiving layer of the obtained heat-meltable ink image-receiving sheet, The heat-meltable ink layer of the meltable ink sheet was placed opposite to the heat-meltable ink sheet, and a color image was recorded by selective heating using a 600 dpi thermal head, and an image layer was formed on the heat-meltable ink image-receiving layer. . Next, an adhesive layer of a heat-meltable ink sheet was opposed to the image layer, and an adhesive layer was obtained on the image layer using a 600 dpi thermal head.

  Thereafter, a commercially available PPC paper was applied on the adhesive layer formed in this way, and passed through a laminator LPD2306City manufactured by Fuji Plastic Co., Ltd. adjusted to a roller temperature of 180 ° C. and a roller rotation speed of 1 m / min. The paper was thermally bonded to obtain a printed matter. It was about 100 degreeC when the temperature of the resin layer at the time of heat bonding was measured using the commercially available thermo label.

  The obtained printed matter was evaluated by performing an image dot shape test and an adhesion strength test between the thermal transfer recording medium and the PPC paper as follows.

Stroke Shape Test With respect to the obtained image, the shape of the dot was observed with a stereomicroscope and examined for the absence of the center of the stroke. The case where there was no center omission was evaluated as ◯, and the case where there was a case was evaluated as x.

  The results are shown in Table 1 below.

Adhesive strength test After thermal bonding, the support was forcibly peeled to examine whether the adhesive strength of the image receiving layer, the ink layer, and the adhesive layer to the PPC paper was stronger than the paper interlayer strength of the PPC paper. When the PPC paper is broken and the broken PPC paper is attached to the peeled film surface including the support, it is evaluated as ◯, and the support is broken by any of the image receiving layer, the ink layer, and the adhesive layer. The case where the PPC paper did not adhere to the peeled film surface was evaluated as x.

  In this example, the heat-meltable ink image-receiving sheet image-receiving layer is obtained by adhering the support with an easy-adhesion layer to obtain a printed material. Tests can be substituted. Similarly, in the tape peeling test, the case where the PPC paper adheres to the peeled tape can be evaluated as “good”, and the case where the PPC paper does not adhere can be evaluated as “poor”.

  The obtained results are shown in Table 1 below.

Example 2
Instead of vinyl chloride-vinyl acetate copolymer (VMCA manufactured by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C), acrylic resin (Mitsubishi Rayon BR-60) (number average molecular weight 70000 glass transition point 75 ° C) A heat-meltable ink image-receiving sheet and a heat-meltable ink layer were formed in the same manner as in Example 1 except that they were used. Further, vinyl chloride-vinyl acetate copolymer (VMCA manufactured by Dow Chemical) (number average molecular weight 8000 glass transition point 70 ° C.) 10 parts by weight of BR-60 and Byron 200 made of polyester resin Toyobo instead of 20 parts by weight An adhesive layer was formed in the same manner as in Example 1 except that was used to obtain a hot-melt ink sheet.

  Using the obtained hot-melt ink receiving sheet and hot-melt ink sheet, an image was formed in the same manner as in Example 1 to produce a printed matter.

  The obtained printed matter was tested in the same manner as in Example 1.

  The results are shown in Table 1 below.

Comparative Example 1
A hot-melt ink sheet was obtained in the same manner as in Example 1 except that the resin used for the adhesive layer was changed to 10 parts by weight of BR-60 and 10 parts by weight of Byron 200.

  An image was formed in the same manner as in Example 1 using the same hot-melt ink receiving sheet as in Example 1 and the above-described hot-melt ink sheet, and a printed matter was produced.

  The obtained printed matter was tested in the same manner as in Example 1.

  The results are shown in Table 1 below.

Comparative Example 2
A hot-melt ink sheet was obtained in the same manner as in Example 1 except that the resin used for the ink layer was changed to BR-60.

  An image was formed in the same manner as in Example 1 using the same hot-melt ink receiving sheet as in Example 1 and the above-described hot-melt ink sheet, and a printed matter was produced.

  The obtained printed matter was tested in the same manner as in Example 1.

  The results are shown in Table 1 below.

Comparative Example 3
A heat-meltable ink image-receiving sheet was obtained in the same manner as in Example 1 except that the resin used for the image-receiving layer was changed to BR-60.

  An image was formed in the same manner as in Example 1 using the above heat-meltable ink image-receiving sheet and the same heat-meltable ink sheet as in Example 1, and a printed matter was produced.

  The obtained printed matter was tested in the same manner as in Example 1.

  The results are shown in Table 1 below.

Comparative Example 4
The heat-meltable ink image-receiving sheet and the heat-meltable ink were the same as in Example 1 except that the resin used for the image-receiving layer and the ink layer was changed to BR-60 and the resin used for the adhesive layer was changed to Byron 200. A sheet was obtained.

  An image was formed in the same manner as in Example 1 using the above heat-meltable ink image-receiving sheet and heat-meltable ink sheet, thereby producing a printed matter.

  The obtained printed matter was tested in the same manner as in Example 1.

  The results are shown in Table 1 below.

Comparative Example 5
A heat-meltable ink image-receiving sheet and a heat-meltable ink sheet are obtained in the same manner as in Example 1 except that the resin used for the image-receiving layer is changed to Byron 200 and the resin used for the ink layer is changed to BR-60. It was.

  An image was formed in the same manner as in Example 1 using the above heat-meltable ink image-receiving sheet and heat-meltable ink sheet, thereby producing a printed matter.

  The obtained printed matter was tested in the same manner as in Example 1.

The results are shown in Table 1 below.

  As is clear from Table 1 above, as shown in Examples 1 and 2 of the present invention, when the same resin is contained in all three layers of the image receiving layer, the ink layer, and the adhesive layer, the adhesion to the transferred object is confirmed. The force was good. However, as shown in Comparative Examples 1 to 5, when the same resin is included in two layers among the image receiving layer, the ink layer, and the adhesive layer, or when the same resin is not included in the three layers. However, the adhesive strength to the transfer object decreased.

  From the above Examples and Comparative Examples, it has been found that when the same resin is contained in all three layers of the image receiving layer, the ink layer, and the adhesive layer, good results can be obtained in the adhesive force.

Examples 3 and 4, Comparative Examples 6 to 10
Other than changing the colorant of the yellow ink layer, magenta ink layer, and cyan ink layer used to yellow dye for sublimation ink, magenta dye for sublimation ink, and cyan dye for sublimation ink, respectively Sublimable ink sheets were prepared in the same manner as in Examples 1 and 2 and Comparative Examples 1 to 5.

  Using the obtained sublimable ink sheet and the same ink image-receiving sheet as in Example 1, an image was formed in the same manner as in Example 1 to produce a printed matter.

  About the obtained printed matter, the same test as Example 1 and the following light resistance tests were done.

  The results are shown in Table 2 below.

Light resistance test For printed matter on which a density measurement image was formed, the initial image density was measured using a densitometer RD-19A manufactured by Gretag Macbeth Co., Ltd. Irradiated. After completion of ultraviolet irradiation for a certain time, the image density after the test was measured, and the residual density ratio with respect to the initial density was calculated. The case where the calculated concentration residual ratio was 80% or more was evaluated as ◯, the case where it was 60% or more and less than 80% was evaluated as Δ, and the case where it was less than 60% was evaluated as ×.

  As is apparent from Table 2 above, as shown in Examples 3 and 4 of the present invention, when the same resin is contained in all three layers of the image receiving layer, the ink layer, and the adhesive layer, the adhesive strength to the base material As a result of the light resistance, the residual ratio of image density was 80% or more. However, as shown in Comparative Examples 6 to 10, when the same resin is contained in two types of the image receiving layer, the ink layer, and the adhesive layer, or the same resin is contained in the three types of layers. If not, the adhesive strength to the substrate was lowered and sufficient light resistance was not obtained.

  From the above examples and comparative examples, it was found that when the same resin was contained in all three layers of the image receiving layer, the ink layer, and the adhesive layer, good results were obtained in adhesive strength and light resistance. .

  It can be effectively used for personal authentication media such as licenses, employee cards, membership cards, and credit cards that record color images such as face images.

The top view showing an example of the hot melt ink sheet used for the present invention Sectional view of FIG. Sectional drawing showing an example of the heat-meltable ink image-receiving layer transfer sheet used for this invention Sectional drawing showing an example of a structure of the printed matter which concerns on this invention

Explanation of symbols

      DESCRIPTION OF SYMBOLS 1 ... Ink layer, 2 ... Adhesive layer, 3 ... Support sheet, 4 ... Image receiving layer, 5 ... Base material, 6 ... Back surface layer, 7 ... Image layer, 8 ... Support body, 9 ... Adhesive layer, 10 ... Ink sheet, DESCRIPTION OF SYMBOLS 11 ... Yellow ink, 12 ... Magenta ink, 13 ... Cyan ink, 20 ... Ink image receiving sheet, 30 ... Printing layer

Claims (4)

A heat-meltable ink sheet comprising a support, a heat-meltable ink layer and a heat-sensitive transfer adhesive layer formed on the support, and a heat-meltable ink image-receiving sheet applied to the heat-meltable ink sheet. A combination,
The heat-meltable ink layer, the heat-sensitive transfer adhesive layer, and the heat-meltable ink image-receiving sheet contain at least one kind of the same resin. Combination. A base material, a heat-sensitive transfer adhesive layer provided on the base material, a heat-meltable ink image layer provided on the heat-sensitive transfer adhesive layer, and a heat melt provided on the heat-meltable ink image layer A printed matter comprising a photosensitive ink image-receiving layer,
A heat-fusible ink print, wherein the heat-sensitive transfer adhesive layer, the heat-meltable ink image layer, and the heat-meltable ink image-receiving layer contain at least one same resin. A sublimation ink sheet comprising a support, a sublimation ink layer formed on the support, and a heat-sensitive transfer adhesive layer, and a sublimation ink image-receiving sheet applied to the sublimation ink sheet,
The combination of a sublimable ink sheet and a sublimable ink image-receiving sheet, wherein the sublimable ink layer, the thermal transfer adhesive layer, and the sublimable ink image-receiving sheet contain at least one same resin. Substrate, thermal transfer adhesive layer provided on the substrate, sublimation ink image layer provided on the thermal transfer adhesive layer, and sublimation ink image receiver provided on the sublimation ink image layer A printed matter comprising a layer,
A sublimation ink print, wherein the heat-sensitive transfer adhesive layer, the sublimation ink image layer, and the sublimation ink image receiving layer contain at least one same resin.

Images