JPH02212193A - Thermal transfer image receiving sheet - Google Patents

Abstract

PURPOSE:To form a thermal transfer image requiring no bonding work and generating no release of a hologram image and, further, integrated with the hologram image by providing the hologram image at least to a part between a base material sheet and a dye receiving layer and/or at least to a part of the rear of the base material sheet. CONSTITUTION:An image receiving sheet is formed by forming a dye receiving layer 2 on the surface of the support film 3 of a hologram sheet A consisting of the support film 3, a hologram forming layer 4 and a hologram effect layer 5 and bonding the whole to a base material sheet 1 by an adhesive layer 6. When an image 7 is formed on the dye receiving layer of this image receiving sheet according to a thermal transfer system, since a hologram image A is present under the image 7, a very unique and beautiful image is formed by a multiplier effect of the thermal transfer image 7 and the hologram image A. For example, when the hologram image A is a landscape having depth and the thermal transfer image 7 is a portrait, an image markedly excellent in a stereoscopic feeling not obtained independently by either one of both images is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a thermal transfer image-receiving sheet, and more specifically to aesthetics,
The purpose of the present invention is to provide a thermal transfer image-receiving sheet that can form images with excellent design and specificity.

(Prior art and its problems) Conventionally, methods have been proposed in which a dye-receiving layer is provided on paper or plastic film using a sublimation type thermal transfer method, and various full-color images are formed in the receiving layer. There is.

In this case, the printer's thermal head is used as a heating means, and by heating in an extremely short time, three or four colors can be printed.
A large number of colored dots are transferred to a transfer material, and a full-color image of an original is reproduced using the multicolored colored dots.

The images formed in this way are very clear because the coloring material used is dye, and they have excellent transparency, so the images obtained have excellent intermediate color reproducibility and gradation, and are This is similar to images produced by offset printing or gravure printing, and it is possible to form high-quality images comparable to full-color photographic images.

Further, a hologram sheet is known as a sheet having a unique image, in which a three-dimensional image is reproduced by daylight or illumination light. As such hologram sheets, volume phase type hologram sheets and relief type hologram sheets have been put into practical use, and relief type hologram sheets in particular are widely used as various decorative materials because they are easy to reproduce and can be mass-produced. It looks like this.

In addition, the thermal transfer image of the head can be used as an ID such as an ID card or passport.
When used as a card, it is desirable that the ID card has unique characteristics that are clearly different from other ID cards, and that it is difficult to forge or tamper with. For this reason, it has been proposed to attach a hologram sheet to the thermal transfer image in order to give it a unique design and specificity.

However, with this method, there is a problem that the pasting work is complicated, such as making sure that the thermal transfer image and the hologram sheet do not overlap, and that the hologram sheet once pasted is easy to peel off. There is also a big problem of insufficient gender.

Therefore, an object of the present invention is to provide a thermal transfer image-receiving sheet that does not require pasting work, does not cause peeling of the hologram image, and can form a thermal transfer image that is integrated with the hologram image.

(Means for solving problems) The above objects are achieved by the present invention as described below.

That is, the present invention provides a thermal transfer image-receiving sheet in which a dye-receiving layer is formed on the surface of a base sheet, at least a portion between the base sheet and the dye-receiving layer and/or at least a portion of the back surface of the base sheet. This is a thermal transfer image-receiving sheet characterized by having a hologram image provided on a portion thereof.

(Function) By providing in advance a hologram image on at least a portion between the base sheet and the dye-receiving layer of the thermal transfer image-receiving sheet and/or at least a portion of the back surface of the base sheet,
Provided is a thermal transfer image-receiving sheet that does not require pasting work, does not cause peeling of the hologram image, and can form a thermal transfer image that is integrated with the hologram image.

(Preferred Embodiments) Next, the present invention will be described in more detail by citing preferred embodiments.

As shown in FIGS. 1 to 3, the thermal transfer image-receiving sheet of the present invention has a hologram image A on at least a portion between the base sheet 1 and the dye-receiving layer 2 and/or at least a portion of the back surface of the base sheet. It is characterized by having the following.

FIG. 1 is a diagram illustrating a cross section of an example of a thermal transfer image-receiving sheet of the present invention.

The image-receiving sheet of this example has a dye-receiving layer 2 formed on the surface of the support film 3 of a hologram sheet A consisting of a support film 3, a hologram forming layer 4, and a hologram effect layer 5. or after pasting the hologram sheet A to the base sheet 1 with the adhesive layer 6, the dye-receiving layer 2 is formed on the surface of the support film 3 to the sheet. obtained by

In the image-receiving sheet of this example, the base sheet 1, the adhesive layer 6, and the hologram effect layer 5 may be transparent or opaque, but the other layers need to be transparent or translucent.

When an image 7 is formed on the dye image-receiving layer 2 of such an image-receiving sheet by a thermal transfer method, since the hologram image A exists under the image 7, the thermal transfer image 7 and the hologram image A are
The synergistic effect with this creates a very specific and beautiful image. For example, if the hologram image A is a deep image,
If the thermal transfer image 7 is a portrait, it will be an image with a remarkable three-dimensional effect that cannot be obtained with either image alone.

In particular, since the thermal transfer image 7 is formed with dye, it has high transparency, and even if the area where the image 7 is formed is large, the underlying hologram image can be observed through the image 7. have.

Therefore, by using such an image receiving seed, compared to the conventional technique of pasting a hologram sheet, there is no fear of pasting the hologram sheet or peeling off the pasted hologram sheet, and it is possible to achieve very specificity and sense of unity. It is possible to form a certain image.

FIG. 2 shows another example of the thermal transfer image-receiving sheet of the present invention, and is a diagram illustrating a cross section of an example in which the support film 3 of the hologram sheet A is omitted.

In the image receiving sheet of this example, after pasting the hologram sheet A on the base sheet L as shown in the first diagram, the support sheet 3 is
is peeled off, and a dye-receiving layer 2 is formed on the peeled surface, and the same effect as in the example shown in the first figure is achieved.

FIG. 3 shows still another example of the thermal transfer image-receiving sheet of the present invention, and is a diagram illustrating a cross section of an example in which an adhesive layer 8 is provided between the hologram sheet A and the dye-receiving layer 2. This example is useful when the adhesion between the dye-receiving layer 2 and the support film 3 of the hologram sheet A is poor, and provides excellent effects similar to the example shown in the first figure.

Although preferred examples of the present invention have been described above, in these examples, it is not essential that the hologram sheet A be provided on the entire surface of the base sheet 1, and it is natural that it may be provided on a part of the base sheet 1. . Further, if the base sheet 1 and the adhesive layer 5 are transparent, the hologram sheet A may be provided on the back surface of the base sheet 1, and the same effects as described above can be achieved.

The base sheet used in the present invention as described above includes synthetic paper (polyolefin-based, polystyrene-based, etc.), wood-free paper,
, art paper, coated paper, cast coated paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin internalized paper, paperboard, etc., cellulose fiber paper, polyolefin, polyvinyl chloride, polyethylene terephthalate , polystyrene, polymethacrylate,
Various plastic films or sheets such as polycarbonate can be used, and white opaque films formed by adding white pigments and fillers to these synthetic resins, foamed foam sheets, etc. can also be used, but are not particularly limited.

Furthermore, a laminate made of any combination of the above-mentioned base sheets can also be used. Typical examples of laminates include cellulose fiber paper and synthetic paper, or synthetic paper of cellulose fiber paper and plastic film or sheet. The thickness of these base sheets may be arbitrary, for example, 10 to 300 mm.
The thickness is generally on the order of μm.

Further, the hologram sheet A used in the present invention may be any conventionally known transparent type, semi-transparent type, or opaque type (reflective type).
It may be a sheet having a hologram image, but there are no particular limitations.

Such hologram sheets themselves are well known, and have been explained in detail in numerous prior application specifications 8 or [Print Information, March 1986 issue, pages 17 to 24] by the applicant regarding the manufacture and use of holograms. There is.

A particularly preferred hologram in the present invention is a relief hologram.

A relief hologram is a hologram image that is reproduced three-dimensionally by white light such as daylight or illumination light, or specific reproduction light such as laser light.In particular, the image is reproduced by white light such as daylight or illumination light. These holograms have excellent portability because the hologram image can be observed even under normal conditions, while those of the type in which the image is reproduced by laser light are excellent in detecting forgery or tampering.

A relief hologram will be explained using FIG. The relief hologram has a structure in which a support film 3, a hologram forming layer 4, and a hologram effect layer 5 are laminated in this order.

Such a hologram sheet is, for example, formed on the surface of a support film 3 such as a polyethylene terephthalate film.
A resin layer that is solid at room temperature and has thermoformability, for example, an ionizing radiation curable resin layer 4 (hologram formation layer) that is solid at room temperature and thermodegradable is formed, and the interference pattern of the hologram is formed in an uneven shape on this surface. The uneven shape is transferred to the resin layer 4 by pressing a hologram original plate (not shown) formed on the resin layer 4 and hardened, and furthermore, the uneven surface is given a large reflectivity at an angle that is sufficiently transparent. This can be obtained by forming a thin hologram effect layer 5 made of a material having a different refractive index from that of the hologram forming layer 4 (for example, an aluminum vapor-deposited thin film). As described above, the materials and methods for forming these may be conventionally known materials and methods.

In such a hologram sheet, a hologram image can be observed with reflected light due to the hologram effect layer 5, and since the hologram effect layer 5 is nearly transparent, it can also be observed with transmitted light, and the sheet is transparent or semitransparent as a whole. Of course, if the hologram effect layer is not formed, a completely transparent hologram sheet will be obtained, and if the hologram effect layer is formed of, for example, an opaque and reflective metal, an opaque (reflective) type relief hologram will be obtained.

The thickness of these hologram sheets may be arbitrary, and typically has a thickness of about 10 to 300 μm, for example.

If the hologram sheet A as described above has poor adhesion with the receptor layer 2 formed on its surface, the surface may be subjected to a brimer treatment or a corona discharge treatment, or a transparent adhesive layer 8 as shown in the third figure is applied. It can also be formed.

The receptor layer 2 formed on the surface of the hologram sheet A is:
It receives the sublimable dye that migrates from the thermal transfer sheet and maintains the formed image.

Examples of the resin for forming the dye-receiving layer include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, vinyl polymers such as polyvinyl acetate and polyacrylic ester,
Polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polyamide resins, copolymer resins of olefins such as ethylene and propylene and other vinyl compounds, ionomers, cellulose resins such as cellulose diacetate, etc. , polycarbonate, etc., and particularly preferred are vinyl resins and polyester resins.

The thermal transfer image-receiving sheet of the present invention is made by adding necessary additives to the above-mentioned resin on the surface of the above-mentioned hologram sheet,
A dispersion dissolved in an appropriate organic solvent or dispersed in an organic solvent or water is coated and dried by a forming method such as gravure printing, screen printing, or reverse roll coating using a gravure plate to form a dye. Obtained by forming a receptive layer. Of course, the dye-receiving layer formed in this manner must be transparent or semi-transparent so that the underlying hologram image can be observed.

The dye-receiving layer formed as described above may have any thickness, but numerically from 1 to 50 .mu.m. Although such a dye-receiving layer is preferably a continuous coating, it may also be formed as a discontinuous coating using a resin emulsion or resin dispersion.

The thermal transfer image-receiving sheet of the present invention can basically be used in 15 minutes even with the above configuration, but the receiving layer of the present invention has a mold release layer in order to have good mold releasability from the thermal transfer sheet. It is preferable to contain an agent.

Preferred mold release agents include silicone oil, phosphate ester surfactants, fluorine surfactants, and silicone oil is preferred.

The above silicone oils include epoxy-modified, alkyl-modified, amino-modified, carboxyl-modified, alcohol-modified, fluorine-modified, alkyl aralkyl polyether-modified,
Modified silicone oils such as epoxy/polyether modified and polyether modified silicone oils are desirable.

One or more types of mold release agents may be used. The amount of the release agent added is preferably 1 to 20 parts by weight per 100 parts by weight of the receptor layer forming resin. If the addition amount does not fall within this range, problems such as fusion between the thermal transfer sheet and the receptor layer or a decrease in printing sensitivity may occur. The release agent preferably accounts for about 0.5 to 30 percent by weight of the dye-receiving layer.

Further, the image receiving sheet of the present invention can be used for various purposes such as thermal transfer recording sheets capable of thermal transfer recording, carts, sheets for transparent original preparation, etc. by appropriately selecting the base material sheet.

Furthermore, in the image receiving sheet of the present invention, a cushion layer can be provided between the holophram sheet A and the receiving layer 2, if necessary. By providing such a cushion layer, image information can be improved with less noise during printing. Corresponding images can be transferred and recorded with good reproducibility.

Examples of the material constituting the cushion layer include polyurethane resin, acrylic resin, polyethylene resin, butadiene rubber, and epoxy resin. The thickness of the cushion layer is preferably about 2 to 20 μm.

Moreover, a slippery layer can also be provided on the back surface of the base sheet.

Examples of the material for the slipping layer include methacrylate resins such as methyl methacrylate or corresponding acrylate resins, and vinyl resins such as vinyl chloride-vinyl acetate copolymer.

Furthermore, it is also possible to provide a detection mark on the image receiving sheet. The detection mark is extremely convenient when positioning the thermal transfer sheet and the image-receiving sheet, and for example, a detection mark that is detected by a phototube detection device can be provided by printing on the back surface of the base sheet.

- The thermal transfer sheet used when performing thermal transfer using the thermal transfer image-receiving sheet of the present invention as described in item F is one in which a dye layer containing a sublimable dye is provided on paper or a polyester film, and is a conventional thermal transfer sheet. Any sheet can be used as is in the present invention.

As the dye used above, any dye used in conventionally known thermal transfer sheets can be effectively used. For example, some preferable dyes include red dyes such as MS Red G and Macrolex Red Violet. R
, Ceres Red 7B, Samaron Red HBSL, S to Lupine 5EGL, Pymicron SN VP 2670
゜Resolin Red F3BS etc., and yellow dyes include Holon Brilliant Yellow S-6GL,
PTY-52, Macrolex Yellow 6G, Teradyl Gortin Yellow 2R5, etc., and blue dyes include Kayaset Blue 14, Watasorin Blue AP-FW, Holon Brilliant Blue S-R, MS Blue 100, Examples include Daito Blue N011.

Furthermore, as a means for applying thermal energy during thermal transfer, any conventionally known means can be used, such as thermal printers (for example,
-100) by controlling the recording time using a recording device such as 5 to 100 mJ/m.
The desired purpose can be achieved in one minute by adding thermal energy of about m''.

(Effects) According to the present invention as described in 1- below, a hologram image is formed on at least a portion of the space between the base sheet and the dye-receiving layer of the thermal transfer image-receiving sheet and/or at least a portion of the back surface of the base sheet. By providing it in advance, a thermal transfer image-receiving sheet is provided that does not require any pasting work, does not cause peeling of the hologram image, and can form a thermal transfer image that is integrated with the hologram image.

(Example) Next, the present invention will be described in more detail with reference to Examples. In the text, parts or percentages are based on weight unless otherwise specified.

Example 1 A solution of ethylene-vinyl acetate copolymer was coated on the surface of a reflective rainbow hologram sheet (A3 size, 50 μm thick, with a landscape image recorded) manufactured by Oguchi Hon Printing Co., Ltd. and dried. , an adhesive layer with a thickness of about 20 μm is formed, and using this adhesive layer, synthetic paper (
Yubo FPG #150) manufactured by Tamago Yuka Co., Ltd. was attached. Furthermore, a coating liquid with the following composition was applied to the surface of the hologram sheet when dry.
It was coated at a rate of 0.0 g/m'' and dried at 100° C. for 30 minutes to obtain a thermal transfer image-receiving sheet of the present invention.

Polyester resin (Vylon200, manufactured by Toyobo) 11
．． 5 parts vinyl chloride/vinyl acetate copolymer (VYIII, UCC
5.0 parts amino-modified silicone (F-393, manufactured by Shin-Etsu Chemical) 1.2 parts epoxy-modified silicone (X-22-343, manufactured by Shin-Etsu Chemical) 1.2 parts methyl ethyl ketone/toluene/cyclohexanone (Weight ratio 4:4:
2) 102.0 parts On the other hand, the three-color sublimation thermal transfer sheet of yellow, magenta, and cyan and the above thermal transfer image-receiving sheet were superimposed with the respective dye layers and dye-receiving surfaces facing each other, and thermal sublimation transfer was performed. Printer (vY-
50, ■90 mJ'/mm'' using Hitachi's new product)
Thermal transfer was performed sequentially from the back side of the thermal transfer sheet using a thermal head using printing energy of 200 mL to form a full-color human image consisting of three colors: yellow, cyan, and magenta.

When the above image is viewed from the front, no hologram image is observed.
The thermal transfer image is clearly visible. When this was observed at an angle of approximately 45° C., it was observed as a clear holographic three-dimensional image or as a background of a thermal transfer image.

Example 2 In Example 1, after attaching the hologram sheet to the base sheet, the support film of the hologram sheet was peeled off, and the same dye-receiving layer as in Example 1 was formed on the peeled surface, and a similar image was produced. Recorded.

When the above image is viewed from the front, no hologram image is observed.
The thermal transfer image is clearly visible. When this was observed at an angle of approximately 45° C., a clear three-dimensional hologram image was observed integrally as the background of the thermally transferred image.

[Brief explanation of the drawing]

FIGS. 1 to 3 are diagrams schematically showing cross sections of the thermal transfer image-receiving sheet of the present invention. 1: Base sheet 2: Dye-receiving layer A: Hologram sheet 3: Support film 4: Hologram forming layer 5: Hologram effect layer 6: Adhesive layer 7: Thermal transfer image 8: Adhesive layer

Claims (1)

[Claims] (1) In a thermal transfer image-receiving sheet in which a dye-receiving layer is formed on the surface of a base sheet, a hologram is formed on at least a portion between the base sheet and the dye-receiving layer and/or at least a portion of the back surface of the base sheet. A thermal transfer image-receiving sheet characterized by being provided with an image.