JP2000006555A - Image display unit and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display unit easily confirmed for a mark of a forgery or a falsification even if a person trying to forge or falsify by wiping off a surface using various organic solvent and manufactured by a relatively simple unit by providing good security against the forgery, falsification or alteration of the display unit and a method for manufacturing it. SOLUTION: The image display unit is recorded on one side surface of a base material (b) with an image or character information using a coloring material. The display unit has a color developing layer using a colorless or pale color colorable substance between the material (b) and the image or characters (e). For example, the display unit is obtained by recording the image or the character by using the coloring material on an image receiving layer of an intermediate transfer medium, and transferring the receiving layer to the base material having the developing layer using the colorless or pale color colorable substance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display provided with an OVD medium such as an image pattern or a hologram formed by image data and applied to a booklet such as an ID card and a passport. The present invention relates to an image display to which a technique for preventing falsification and alteration can be provided.

[0002]

2. Description of the Related Art As a method of reproducing an image on this type of image display, there are known methods such as offset printing, gravure printing, screen printing, etc., which have been printed on a substrate in advance, sublimation. Transfer method using a heat-sensitive transfer ribbon using a resin-type melt-type or wax-melt-type melt-dispersible (heat-migration) dye or pigment, or an electrophotographic method, an inkjet method, or a photopolymerized recording material. Various transfer recording methods can be cited as technically possible examples. Further, it is technically difficult to form an image directly on a final recording medium (final product) to which an image is to be applied using these image forming means, the mass productivity is low, or the cost increases. In the case where some problem is involved, for example, an image is formed on an intermediate transfer medium, and then the image is applied to a final product by transfer.

[0003] A method of manufacturing the above-described image display body by a thermal transfer method will be briefly described below, taking a sublimation transfer type image forming apparatus as a representative.

First, as shown in FIG. 4, an intermediate transfer medium a used for manufacturing the image display body is provided with a heat-resistant base sheet f made of polyethylene terephthalate or the like and provided on the heat-resistant base sheet f. A releasable protective layer g made of a thermoplastic acrylic resin or the like, and a sublimable (heat transferable) dye provided on the releasable protective layer g and thermally bonded to a substrate of an image display body The main part is constituted by the image receiving / adhesive layer 1 made of a resin material having a property.

The intermediate transfer medium a is conveyed to a sublimation transfer apparatus j whose main part is composed of a drum h and a thermal head i as shown in FIG. A dye layer (not shown) of the ribbon k is brought into contact with the image receiving / adhesive layer 1 of the intermediate transfer medium a, and the thermal head i is pressed from the thermal transfer ribbon k side, and
A heating element group (not shown) of the thermal head i is appropriately heated based on the image data to form an image pattern e based on the image data on the image receiving / adhesive layer 1 (see FIG. 6). If the image data is multicolor, a multicolor image pattern e is formed on the image receiving / adhesive layer 1 by applying heat-sensitive transfer ribbons having different color tones and repeating the same steps.

Next, the image receiving / adhesive layer 1 of the intermediate transfer medium a on which the image pattern is formed is brought into contact with the base material b of the image display body, and a heat roll, a hot plate or the like is placed from the intermediate transfer medium a side. Presses and heats the heating medium n of FIG.
And an image display such as an ID card is manufactured by peeling off the heat-resistant base sheet f from the intermediate transfer medium a (see FIG. 7).

As an image display containing such kind of personal recognition data, as shown in FIG. 8A, an image pattern s formed based on image data is formed on a card base r such as polyvinyl chloride. , Or FIG. 8 (B)
As shown in FIG. 5, in addition to the image pattern s, an OVD (Optical Variable Descriptor) represented by a hologram or a diffraction grating image.
vice) An image having an image t is known.

These holograms and diffraction grating OVD techniques require advanced manufacturing techniques and are difficult to duplicate, so that credit cards, ID cards,
It has been used for cards such as prepaid cards. Furthermore, due to its high decorativeness, it is often used for packaging materials, books, pamphlets, POPs, and the like. In the present specification, techniques for optically expressing an image such as the hologram image and the diffraction grating image are collectively referred to as OVD. As a means for attaching these OVDs to an article, a method of transfer-forming using a transfer foil has conventionally been adopted. This type of transfer foil has a release layer on the base sheet,
There is known a configuration in which a relief layer on which an image pattern of a hologram or a diffraction grating is formed, a reflective layer formed by a known thin film forming means, and an adhesive layer are sequentially laminated. These OVD patterns (holograms and diffraction grating patterns) engraved on the transfer foil are copied in a large amount by a well-known method of duplicating a fine concavo-convex pattern on a nickel press plate and heating and pressing the relief layer. I have.

The reflection layer is a thin film (hereinafter, referred to as a transparent thin film layer) formed of a transparent substance having a different refractive index by a known thin film forming means such as a vacuum evaporation method. It is a known technique to form a transparent hologram or a transparent diffraction grating formed body by forming. In this case, it is apparent from an optical point of view that the greater the difference in the refractive index between the relief layer and the transparent thin film layer, the greater the reflectance. (Refractive index of relief layer) <(Refractive index of transparent thin film layer)

The method for forming the OVD transfer sheet will be briefly described. FIG. 9 is a cross-sectional view illustrating a configuration example of a transparent OVD transfer sheet. The OVD transfer sheet has a layer that transmits and reflects light, that is, a transparent thin film layer 93b, and has an excellent eye-catching effect without impairing a design such as printing on a substrate as a transfer target. Can be. Hereinafter, the configuration will be described based on the cross-sectional view of FIG. A release layer (peelable protective layer) 92 is formed on a support 91, and a relief forming layer 93 a provided with an OVD pattern such as a hologram or a diffraction grating and a transparent thin film layer 93 b are formed on the release layer 92. An adhesive layer 94 is formed on the transparent thin film layer 93b. In the above description and the following description, the upper and lower relations are reversed in the cross-sectional view and the description, but the upper and lower relations are in the direction of observing the transfer foil (or the use state when transferring and forming the transfer foil). ) Is not essential because it changes according to.

The relief forming surface of the OVD layer 93 is
When present on the opposite side of the support body 91 and transferred to the article surface, the peeling layer 92 peels off at the interface with the base material 91 and moves to the article side to function as a protective layer.
It may be referred to as a “peelable protective layer”. In addition, each layer transferred to the article side excluding the support is collectively referred to as a “transfer layer” in this specification.

Each drawing schematically represents the configuration of the transfer foil, and the dimensions such as the thickness of each layer are not based on actual products.

For these holograms, a relief-type master plate composed of a fine concavo-convex pattern is generally prepared by an optical photographing method, and a nickel press plate obtained by duplicating the concavo-convex pattern by an electroplating method is duplicated. Mass replication is performed by a known method of heating and pressing this press plate on the relief forming layer 93a.

Unlike a hologram capable of reproducing a three-dimensional image, a plurality of types of simple diffraction gratings are arranged in a small area to form pixels, and a diffraction grating image such as a grating image or a pixelgram expressing an image is also used. , Mass replication is performed in the same way as holograms, and credit cards, cash cards,
Various cards such as membership card, employee ID card, prepaid card, driver's license, various paper tickets such as gift certificate, gift certificate, stock certificate, various forms such as application form, receipt, copy slip, etc., In addition to various booklets such as passports, passbooks, pension notebooks, etc., they are used by being attached to a part or the entire surface of a book or notebook, such as a cover or panel, for display use.

[0015]

However, an image display manufactured using such an intermediate transfer medium forms an image on the image receiving layer side of the intermediate transfer medium. The penetration of the image on the substrate side is smaller than that of the system. Therefore, there is a problem that there is a high possibility that an attempt is made to try to falsify or falsify by wiping off the surface using various organic solvents.

The present invention has been made in view of the above-mentioned problems of the prior art, and has good security against forgery, tampering, or alteration of an image display. Even if there is a person who tries to falsify or falsify by wiping off the surface using a solvent, the trace of the falsification / falsification can be easily confirmed, and it is a relatively simple device. It is another object of the present invention to provide an image display which can be manufactured and a method for manufacturing the same.

[0017]

In order to solve the above-mentioned problems, first, according to the present invention, there is provided an image using a color material or an image in which character information is recorded on at least one surface of a base material. A display body, comprising at least one of a color-forming layer using a colorless or light-colored color-forming substance, between the base material and the image or between the base material and the characters. It is an image display that is a feature.

According to a second aspect of the present invention, there is provided the image display according to the first aspect, wherein the image or character information or the area provided with the coloring layer is at least partly or entirely provided. Are covered by the OVD image.

The invention according to claim 3 is based on the image display according to claim 1 or 2, wherein the image includes at least a face image, and the character information includes at least the face image. It is characterized in that information related to an image is included.

According to a fourth aspect of the present invention, there is provided an intermediate transfer medium comprising at least an image receiving layer on a support,
After recording the image or character information using a color material, using a colorless substance that is colorless or light color, and, for a substrate having a color forming layer provided in a solid or arbitrary pattern shape The image or character information is provided on the substrate by superimposing the image receiving layer of the intermediate transfer medium on the surface on the side where the color forming layer is provided, and heating and pressurizing them. It is a manufacturing method of a display body.

According to a fifth aspect of the present invention, there is provided an intermediate transfer medium comprising at least an image receiving layer on a support,
After forming image or character information using a color material, the color transfer agent transfer layer of a thermal transfer ribbon using a color transfer material having a color transfer material having a colorless or light color and having a heat transfer property. Are stacked facing each other on the surface of the image receiving layer, and by selectively heating and pressing the color forming agent transfer layer, the color forming material is used on the surface of the image receiving layer to form a solid or any pattern. A color-forming layer is provided, and thereafter, the image or character information is provided on the base material by heating and pressing the image-receiving layer side of the intermediate transfer medium facing the base material and by applying heat and pressure. This is a method for manufacturing an image display.

According to a sixth aspect of the present invention, there is provided a method for manufacturing an image display according to the fifth or sixth aspect, wherein the intermediate transfer medium includes an OVD between a support and an image receiving layer. When the image is provided, and the side of the surface of the image receiving layer is superimposed on the substrate and heated and pressed, the OVD image is transferred to the side of the substrate together with the image receiving layer, or
The OVD image is adhered to the substrate side together with the support and the image receiving layer.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <Operation> An image display manufactured using a conventional intermediate transfer medium uses various organic solvents typified by methyl ethyl ketone, toluene, ethanol and the like to obtain an image recorded thereon. Or, an attempt to remove the textual information may in some cases be carried out, for example, by a criminal (although complete removal is not always easy). In the case of an image forming body to which the present invention is applied, if an attempt is made to falsify or falsify image data with various organic solvents,
Because the coloring layer provided on the image display body develops color,
The fact that the user attempted to alter or tampering appears as a very easy-to-find trace (a kind of signal). Therefore, the present invention can also be effective as a deterrent against malicious acts such as forgery, falsification, and tampering.

[0024]

Embodiment 1 Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a basic configuration of an image display 1 according to the present embodiment. Paper and PV
A coloring layer 3 is provided on a base material 2 made of a material such as C;
An image receiving / adhesive layer 4 having image information is provided on the color forming layer 3, and a protective layer 5 is provided on the image receiving / adhesive layer 4.

In this embodiment, an image is formed by forming an image on an intermediate transfer medium containing an OVD image by using a resin-type melting type transfer method in which a pigment is dispersed, and then transferring the image onto a substrate provided with a color-forming layer. A method for producing a body will be described as a representative.

Production of resin-type melt thermal transfer ribbon:
Pigments of four colors (yellow, cyan, magenta, black) are each dispersed in a vinyl chloride / vinyl acetate copolymer resin to prepare a pigment ink, and each color is formed on a 6 μm-thick polyethylene terephthalate film using a gravure coater. Coating and drying were performed so as to be alternately arranged to produce a resin-type melt-transfer ribbon having four color pigment layers (not shown). Note that characters, figures, barcodes, and the like formed in the above black color are sometimes used as optical character identification (OCR).
It is necessary to appropriately adjust the black pigment concentration and the film thickness so that the value (Print Contrast Signal) becomes 0.6 or more. Further, it is naturally preferable to provide a back layer for preventing sticking and sticking during transfer on the reflection surface of the transfer ribbon.

Production of Intermediate Transfer Medium: The intermediate transfer medium according to this embodiment has the structure shown in FIG. That is, the peelable protective layer 5 is formed on the support 6, the OVD layer 7 is formed on the peelable protective layer 5, and the image receiving / adhesive layer 4 is formed on the OVD layer 7.

Here, the support 6 is required to have heat resistance and strength so as not to be softened and deformed by the heat pressure in thermal transfer. The material can be selected independently from synthetic resins such as polyvinyl chloride, polyester, polycarbonate, polymethyl methacrylate, polystyrene, polyethylene, polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyvinyl alcohol, etc., natural resins, paper, synthetic paper, etc. Or a complex selected from the above and combined. The thickness may be 2 to 100 μm in consideration of operability and workability, but is preferably about 6 to 50 μm in consideration of handling properties such as transfer suitability and workability.

In this example, a 16 μm-thick polyethylene terephthalate film was used, and a peelable protective layer composition having the following compounding ratio was applied and dried to a thickness of 1.5 μm. The releasable protective layer 5 is provided for more effectively transferring the OVD layer 7 and the image receiving / adhesive layer 4 to a transfer target (not shown). Furthermore, when it becomes a final product, it functions as a protective layer.

Acrylic resin 30 parts Polyester resin 5 parts Polyethylene powder 5 parts Toluene 40 parts Methyl ethyl ketone 40 parts Methyl isobutyl ketone 20 parts

As the releasable protective layer 5, a thermoplastic resin, a thermosetting resin,
Either an ultraviolet ray or an electron beam curable resin may be used, but a thermoplastic resin is preferable in consideration of flexibility and foil breakability. Examples include thermoplastic polyacrylate resins, chlorinated rubber resins, vinyl chloride-vinyl acetate copolymer resins, cellulose resins, chlorinated polypropylene resins, epoxy resins, polyester resins, nitrocellulose resins, and styrene. An acrylate resin, a polyether resin, a polycarbonate resin, or the like can be used alone or in combination. In addition, in consideration of the foil breaking property and wear resistance, various waxes such as petroleum wax and vegetable wax, metal salts of higher fatty acids such as stearic acid, lubricants such as silicone oil, Teflon powder, polyethylene powder, silicone fine particles Organic fillers such as acrylonitrile-based fine particles and inorganic fillers such as silica fine particles can also be added.

The releasable protective layer 5 need not be provided when the support 6 itself has releasability or when the support itself has been subjected to a release treatment. However, in this case, after the transfer, the layer corresponding to the outermost surface (in this embodiment, O
The VD layer 7) may be provided with abrasion resistance, or a protective layer may be provided after the transfer. The thickness of the peelable protective layer can be formed in the range of 0.1 to 20 μm,
When the protective layer is provided later, there is no particular limitation.

FIG. 2 shows an example of the OVD layer.
The relief type transparent hologram shown in the configuration (B) was used. The manufacturing method will be described below. The relief forming layer 8 has a hologram relief forming surface on a surface opposite to the peelable protective layer 5, and a transparent thin film layer 9 is formed on the relief forming surface. The relief forming surface can be formed by heating and pressing a nickel press plate on which a fine uneven pattern constituting the relief hologram is formed on the relief forming layer. The relief forming layer may have a hologram pattern on the layer surface (the above-described relief forming surface) or in the layer. In addition, for example, fine irregularities may be formed by a two-beam interference or a diffraction grating (grating) by an electron beam (EB). A grating hologram or a Lippmann hologram having a shape can be applied. The transparent thin film layer 9 is a transparent material having a higher refractive index than the relief forming layer (refractive index n = 1.3 to 1.7). For example, the inorganic materials shown in Table 1 below can be used. Has become. Further, the transparent thin film layer 9
A plurality of layers may be formed by being stacked, or a combination of layers having different refractive indices, or a multilayer film in which layers having a high refractive index and layers having a low refractive index are alternately laminated.

[0034]

[Table 1]

As a method for forming such a transparent thin film layer 9, a film forming means such as a sputtering method or an ion plating method can be applied in addition to the vacuum evaporation method.
The thickness is preferably in the range of 10 nm to 1000 nm. Further, as the transparent thin film layer, a high refractive index fine powder such as TiO ₂ may be dispersed in a resin, and the difference in refractive index from the relief forming layer may be 0.2 or more. In this case, since a coating film can be formed by a general coating method, the film thickness is not limited to the above-described film thickness.

Here, the relief forming layer 8 is a resin having good embossing formability, hardly causing press unevenness, obtaining a bright reproduced image, and having good adhesion to the peelable protective layer 5 and the transparent thin film layer 9. Here, a composition having the following compounding ratio was used, and formed so that the thickness after drying was 1.0 μm.

Polyurethane resin 30 parts Methyl ethyl ketone 70 parts Toluene 30 parts

The relief forming surface was formed with such a composition at a plate surface temperature of 160 ° C. of the above-described press plate.

The relief forming layer 8 may be made of a thermoplastic resin such as a polycarbonate resin, a polystyrene resin, or a polyvinyl chloride resin, an unsaturated polyester resin, or the like.
Thermosetting resins such as melamine resin, epoxy resin, urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and the like Mixtures, thermoformable materials having radically polymerizable unsaturated groups, and the like can be used. In addition, materials other than those described above can also be used as long as they are stable enough to form OVD images.

The transparent thin film layer 9 is a transparent material for transmitting the information of the relief forming layer 8 and has a thickness of 50 here.
nm of ZnS was formed by a vacuum evaporation method.

Next, an image-receiving / adhesive layer composition having the following composition ratio was applied to the transparent thin film layer 9 so as to have a thickness of 4.0 μm and dried (drying, 100 ° C., 5 min).

Vinyl chloride-vinyl acetate copolymer: 30 parts Polyester resin: 30 parts Methyl ethyl ketone: 50 parts Toluene: 50 parts

The image receiving / adhesive layer 4 may be made of, for example, polyester such as linear saturated polyester, vinyl chloride resin such as polyvinyl chloride or vinyl chloride-vinyl acetate copolymer resin, polyacrylic acid, polyacrylic acid-containing resin. 2-methoxyethyl, polymethyl acrylate, polyacrylic acid-2
-Naphthyl, polyisobornyl polyacrylate, polymethacrylomethyl, polyacrylonitrile, polymethylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, poly-tert-butyl methacrylate, polybutyl methacrylate, isobutyl methacrylate, polyphenyl methacrylate, methacrylic Acrylic resins such as copolymers of methyl acrylate and alkyl methacrylate (where the alkyl group has 2 to 6 carbon atoms), polystyrene, polydivinylbenzene,
Examples thereof include polyvinyl benzene, styrene-butadiene copolymer resin, and vinyl resins such as styrene and alkyl methacrylate (wherein the alkyl group has 2 to 6 carbon atoms), but the present invention is by no means limited to these. .

Further, in order to prevent discoloration of the coloring material constituting the image due to light, an ultraviolet absorber having a maximum absorption wavelength of 250 to 400 nm may be added to the image receiving layer / adhesive layer 4.
Examples of such an ultraviolet absorber include phenyl salicylate, p-tert-butylphenyl salicylate,
salicylic acid-based ultraviolet absorbers such as p-octylphenyl salicylate, 2,4-dihydroxybenzophenone,
2-hydroxybenzophenone, 2-hydroxy-4-
Octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-
Benzophenone-based ultraviolet absorbers such as 4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2- (2'-hydroxy-
5′-methylphenyl) benzotriazole, 2-
(2′-hydroxy-5′-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-
3'-tert-butyl-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'
-Di-tert-amylphenyl) benzotriazole-based ultraviolet absorbers such as benzotriazole; cyanoacrylates such as 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate and ethyl-2-cyano-3,3-diphenylacrylate UV absorbers and the like. Further, a fine powder inorganic ultraviolet shielding agent such as TiO2 or ZnO may be used. Incidentally, the compounding ratio of the above-mentioned ultraviolet absorbent is determined by the composition 10 comprising a resin or the like constituting the image receiving layer.
The range may be 5 to 40 parts by weight with respect to 0 parts by weight.

Production of a substrate provided with a color-forming layer: In this example, a substrate 2 was made of paper.

The paper used in the present invention is made from vegetable fibers or synthetic fibers, beaten in water and entangled.
Dehydrated and dried. At this time, the strength between fibers is obtained by the hydrogen bond between the hydroxyl groups of the cellulose as the raw material. Additives used for paper include clay, talc, calcium carbonate, titanium dioxide, etc., and sizing agents include rosin, alkyl ketene dimer, stearic anhydride, alkenyl succinic anhydride, wax, etc. Examples of the enhancer include modified starch, polyvinyl alcohol, polyacrylamide, urea-formaldehyde, melamine-formaldehyde, polyethyleneimine, and the like. These materials are added at the time of papermaking, and paper is mainly formed by a fourdrinier paper machine. is not.

The paper-making method may be a method used in the production of ordinary plant fiber paper. The fiber expanded sufficiently with a water-diluted raw material having a raw material concentration of 0.1 to 5%, preferably 0.3 to 0.6% is used. It is made by kneading well, pouring it on a slender, stitched wire, etc., squeezing water, and evaporating water by heating.

In addition, when synthetic fibers or magnetic metal fibers other than plant fibers are mixed, a binding agent is often required since the synthetic fibers do not have a binding force such as a hydrogen bond. It is desirable that the ratio and the amount of the binder are appropriately determined so as not to reduce the strength of the paper.

Examples of the color-forming substance which develops a color with various organic solvents include colorless leuco dyes. Examples of the leuco dye include crystal violet lactone, 3-indolino-3-p-dimethylaminophenyl-6-dimethylaminophthalide, 3-diethylamino-7-chlorofluoran, and 2- (2-chlorophenylamine) -diethylaminofuran. Orane, 2- (2-fluorophenylamino) -6-diethylaminofluoran, 2- (2-fluorophenylamino) -6-di-n-butylaminofluoran, 3-diethylamino-7-cyclohexylaminofluoran, 3-diethylamino-5-methyl-7-
t-butylfluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6
-Methyl-7-p-butylanilinofluoran, 3-cyclohexylamino-6-chlorofluoran, 2-anilino-3-methyl-6- (N-ethyl-p-toluidino) -fluoran, 3-pyrrolidino- 6-methyl-7-
Anilinofluoran, 3-pyrrolidino-7-cyclohexylaminofluoran, 3-N-methylcyclohexylamino-6-methyl-7-anilinofluoran, 3-N
-Ethylpentylamino-6-methyl-7-anilinofluoran and the like.

Further, 4,4'-isopropylidenephenol, benzyl-p-hydroxybenzoate,
A color developer having a phenolic hydroxyl group, such as 4'-dihydroxy-3,5'-diaridiphenylsulfone, methyl-bis (hydroxyphenyl) acetate, gallic acid ester, and p-phenylphenol, may be suitably used to improve the color sensitivity. You may mix.

Also, 2,6-dichlorophenyl isocyanate, p-chlorophenyl isocyanate, 1,3-
Phenylene diisocyanate, 1,4-phenylene diisocyanate, 1,3 dimethylbenzene-4,6-diisocyanate, 1,4 dimethylbenzene-2,5-diisocyanate, 1-methoxybenzene-2,4 -Diisocyanate, 1-methoxybenzene-2,5-diisocyanate, 1-ethoxybenzene-2,4-diisocyanate, 2,5-dimethoxybenzene-1,4-diisocyanate, 2,5-diisocyanate Diethoxybenzene-1,4-diisocyanate, 2,5-dibutoxybenzene-1,4
-Diisocyanate, azobenzene-4,4'-diisocyanate, diphenylether-4,4'-diisocyanate, naphthalene 1,4-diisocyanate, naphthalene 1,5-diisocyanate, naphthalene 2,6-
Diisocyanate, naphthalene 2,7-diisocyanate, 3,3′-dimethylbiphenyl-4,4′-diisocyanate, 3,3′-dimethoxybiphenyl-4,
4'-diisocyanate, diphenylmethane-4,4 '
-Diisocyanate, benzophenone-3,3'-diisocyanate, fluorene-2,7-diisocyanate, anthraquinone-2,6-diisocyanate, 9-
Ethylcarbazole-3,6-diisocyanate, pyrene-3,8-diisocyanate, naphthalene-1,3,3
7-triisocyanate, biphenyl-2,4,4'-
Aromatic isocyanate compounds such as triisocyanate, 4,4 ′, 4 ″ -triisocyanate-2,5-dimethoxytriphenylamine and p-dimethylaminophenyl isocyanate;

3-iminoindoline-1-one, 3-imino-4,5,6,7-tetrachloroisoindoline-
1-one, 3-imino-4,5,6,7-tetrabromoindoline-1-one, 3-imino-4,5,6,7-
Tetrafluoroisoindoline-1-one, 3-imino-5,6-dichloroisoindoline-1-one, 3-imino-4,5,7-trichloro-6-methoxyisoindoline-1-one, 3-imino -4,5,7-trichloro-6-methylmercapto-isoindoline-1-one, 3-imino-6-nitrosoindoline-1-one,
3-imino-isoindoline-1-spiro-dioxolan, 1,1-dimethoxy-3-imino-isoindoline, 1,1-diethoxy-3-imino-4,5,6,7
-Tetrachloroisoindoline, 1-ethoxy-3-iminoisoindoline, 1,3-diiminoisoindoline, 1,3-diimino-4,5,6,7-tetrachloroindoline, 1,3-diimino-6 -Methoxyisoindoline, 1,3-diimino-6-cyanoisoindoline, 1,3-diimino-4,7-dithia-5,5,6,
6 tetrahydroisoindoline, 7-amino-2,3-
Dimethyl-5-oxopyrrolo [3,4b] pyrazine, 1
-Iminonaphthalimide, 1-iminodipheninimide 1-phenylimino-3-iminoisoindoline,
1- (3′-chlorophenylimino) -3-iminoisoindoline, 1- (2 ′, 5′-dichlorophenylimino) -3-iminoisoindoline, 1- (2 ′, 4 ′,
5-trichlorophenylimino) -3-iminoisoindoline, 1- (2'-cyano-4'nitrophenylimino) -3-iminoisoindoline, 1- (2'-chloro-5'cyanophenylimino) -3 -Iminoisoindoline, 1- (2 ', 6'-dichloro-4'nitrophenylimino) -3-iminoisoindoline, 1- (2',
5'-dimethoxyphenylimino) -3-iminoisoindoline, 1- (2 ', 5'-diethoxyphenylimino) -3-iminoisoindoline, 1- (4'-N, N
-Dimethylaminophenylimino) -3-iminoisoindoline, 3-imino-1-sulfobenzoic imide, 3
An imino compound such as -imino-1-sulfo-6-chlorobenzoic imide can also be used as a color-forming substance. The aromatic isocyanate compound and the imino compound may be used alone or as a mixture of both.

The above-mentioned dyes, color developing materials or pigments are prepared by dispersing a coating solution prepared by dispersing a suitable polymer binder with water or a solvent in a solvent such as bar coat, blade coat, air knife coat, gravure coat, roll coat and the like. Paper or plastic film, synthetic paper, resin-impregnated paper by a known coating method such as a coating method or screen printing,
A thermosensitive recording medium is formed by coating and drying on a substrate such as a nonwoven fabric. Here, as the polymer binder, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, starch, styrene-maleic acid copolymer, polymethyl methacrylate, homo- or copolymer of methacrylic resin such as polyethyl methacrylate, Polystyrene, acrylic-styrene copolymer, polyester resin,
Macron resin, ABS resin, nitrocellulose, synthetic resin latex, and the like can be used, but it goes without saying that it may be used by dispersing it in a commercially available water-based ink.

In preparing the paint, the coloring layer contains various fillers such as titanium oxide, calcium carbonate and talc, pigments and other metal salts of higher fatty acids such as zinc stearate and calcium stearate to prevent blocking, polyethylene wax, and the like. Waxes such as carnauba wax can be used as needed.

Here, the color-forming layer 3 was formed on the entire surface of the substrate so as to have a thickness after drying of 4.0 μm using a composition having the following compounding ratio.

Polyurethane resin 45 parts Polyvinyl alcohol 5 parts Crystal violet lactone 10 parts Water 40 parts

A printing layer (not shown) may be provided on the substrate or the color forming layer. Printing layers include iris-colored pearl chips, fading ink,
Fluorescent ink, thermal ink, optically changing ink (O
Various techniques can be incorporated, such as inks such as VI), fine line printing, rainbow printing, intaglio printing, pixel printing and the like.

Then, the intermediate transfer medium and the heat-sensitive transfer ribbon manufactured as described above are set in the apparatus shown in FIG. 5, and the heating elements of the thermal head are heated based on image data in the same manner as in the conventional method. A multicolor face photograph 10 and character information 11 composed of a resin-type molten ribbon in which the above pigment is dispersed are formed on the image receiving / adhesive layer 4 of the intermediate transfer medium. Thereafter, the image receiving / adhesive layer 4 of the intermediate transfer medium is brought into contact with the base material 2 provided with the color forming layer 3, and the heating medium is heated and pressurized (heating temperature: 125 ° C.) from the intermediate transfer medium side. The image-receiving body as shown in FIG. 3 was manufactured by pressing the image receiving / adhesive layer 4 onto the substrate and peeling the support 6 from the intermediate transfer medium.

Embodiment 2 Next, an image display according to a second embodiment of the present invention will be described. In Example 1, the color-forming layer 3 was provided on the substrate side, and no color-forming layer was provided on the intermediate transfer medium side. In Example 2, image or character information was recorded using a coloring material on the image receiving layer of the intermediate transfer medium, and on the surface of the image receiving layer, a thermal transfer ribbon provided with a color former transfer layer on a support was used. Using a heat-sensitive transfer to transfer and record the color-forming layer in a pattern and transferring this image-receiving layer onto the substrate,
An image display was produced in the same manner as in Example 1.

Production of Resin-Type Melt Transfer Ribbon: First, the pigment inks of the four colors used in Example 1 and the ink for the color transfer layer having the following composition were mixed with a gravure coater using polyethylene terephthalate having a thickness of 6 μm. Coating and drying were performed so that each color was alternately arranged on the film, thereby producing a resin-type melt transfer ribbon having a pigment layer and a color-forming agent transfer layer of four colors (not shown).

Acrylic resin 35 parts Polyvinyl alcohol 5 parts Crystal violet lactone 10 parts Water 50 parts

In the same manner as in the first embodiment, the heating element group of the thermal head is heated based on the image data to generate a multi-colored resin ribbon formed by dispersing the pigment in the image receiving / adhesive layer 4 of the intermediate transfer medium. After the face photograph 10 and the character information 11 were formed, the color transfer layer was similarly transferred in a pattern to obtain a color layer 3. Thereafter, the image receiving / adhesive layer 4 of the intermediate transfer medium is brought into contact with the base material 2, and the heating medium is heated and pressurized (heating temperature: 125 ° C.) from the intermediate transfer medium side to form an image receiving / adhesive layer 8 on the base material. And the support 5 was peeled off from the intermediate transfer medium to produce an image display.

<Comparative Example 1> Next, as a comparative example, the coloring layer 3
Except that it does not have
An image display according to the conventional technique was created.

Here, the image display bodies produced in Example 1, Example 2 and Comparative Example 1 were rubbed on the surface with a cotton cloth moistened with an organic solvent of methyl ethyl ketone, toluene and ethanol, and the images were wiped off. Tried. Example 1
In the image display manufactured by the above method, before the image completely disappeared with each of the above organic solvents, the color-forming layer developed color, and the substrate could not be reused. The image display manufactured in Example 2 is:
The coloring layer was colored in a pattern by the above organic solvent, and similarly, the substrate could not be reused. Since the image display body manufactured in Comparative Example did not have a coloring layer, it was possible to wipe off the image by rubbing each organic solvent with a wet cotton cloth. Therefore, it is not impossible to modify using a commercially available inkjet printer or the like.

[0065]

As described above, by providing a color developing layer inside an image display, image data can be removed by using various organic solvents, and forgery and tampering such as data replacement can be easily prevented. An image display that can be provided.

Further, on the image receiving layer of the intermediate transfer medium having at least the image receiving layer on the support, the image information and the color forming layer colored by the coloring material can be formed in the same step and in an arbitrary shape. It is also possible to form a coloring layer having a different pattern for each display, and it is not necessary to make a printing plate of a fixed pattern even in the production of a small lot, so that the productivity can be improved.

Further, by providing an OVD image on the entire surface, it becomes more difficult to partially alter a face photograph, character information, or the like, and an image display body with higher anti-counterfeiting properties can be provided.

[Brief description of the drawings]

FIG. 1 shows a basic configuration of an image display according to the present invention.
It is explanatory drawing which shows the outline using a sectional view.

FIG. 2A is a schematic cross-sectional view of the intermediate transfer medium of the present embodiment, and FIG. 2B is a schematic cross-sectional view of a specific example of the intermediate transfer medium of the present embodiment.

FIG. 3 is a front view of the image display body created in the embodiment of the present invention.

FIG. 4 is a sectional view of a conventional intermediate transfer medium.

FIG. 5 is an explanatory diagram of an apparatus for creating an image display using the intermediate transfer medium of the present invention.

FIG. 6 is an explanatory diagram when an image is formed on an intermediate transfer medium of the present invention.

FIG. 7 is a front view of an image display manufactured using the apparatus of FIG. 5;

FIGS. 8A and 8B are plan views showing a conventional image display medium.

FIG. 9 is a cross-sectional view illustrating a configuration example of a conventional transparent OVD transfer sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Image display body 2 ... Base material 3 ... Color forming layer 4, 94 ... Image receiving / adhesive layer 5, 92 ... Peeling protective layer 6, 91 ... Support 7 ... OVD layer 8,93a ... Relief forming layer 9,93b ... Transparent thin film layer 10 ... Face photograph information 11 ... Character information

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2C005 HA01 HB02 JA18 JA19 JB01 JB08 JB09 JB14 KA37 KA70 LA11 LA14 LA20 LA22 LA30 2H111 AA01 AA07 AA27 AA33 AA40 AB06 CA03 CA33 CA41

Claims (6)

[Claims] 1. An image display body in which image or character information using a coloring material is recorded on at least one surface of a base material, wherein the base material and the character or the base material and the character An image display body comprising a color-forming layer using a colorless or light-colored color-forming substance in at least one of the above. 2. The image display according to claim 1, wherein at least a part or the whole of the area provided with the image or character information or the coloring layer is covered with an OVD image. body. 3. The image processing apparatus according to claim 1, wherein the image includes at least a face image, and the character information includes at least information related to the face image. Image display. 4. An intermediate transfer medium having at least an image receiving layer on a support, after recording image or character information using a coloring material on the image receiving layer, using a colorless or light-colored color-forming substance. It is, and, to a substrate having a color forming layer provided in a solid shape or in an arbitrary pattern, the image receiving layer of the intermediate transfer medium is superposed on the surface on the side where the color forming layer is located, and Wherein the image or the character information is provided on the base material by heating and pressing. 5. An intermediate transfer medium having at least an image receiving layer on a support, after forming image or character information using a color material on the image receiving layer, using a colorless or light-colored color-forming substance. And stacking the color transfer agent transfer layer of a thermal transfer ribbon having a color transfer agent transfer layer having thermal transfer properties facing the surface of the image receiving layer, and selectively heating and pressing the color transfer agent transfer layer. Thus, a solid or arbitrary pattern color-forming layer is provided on the surface of the image-receiving layer using the color-forming substance, and thereafter, the image-receiving layer of the intermediate transfer medium is overlapped with the substrate facing the substrate. Wherein the image or the character information is provided on the base material by heating and pressurizing. 6. The intermediate transfer medium is provided with an OVD image between a support and an image receiving layer. 6. The OVD image is transferred to the side of the substrate together with the image receiving layer, or the OVD image is adhered to the side of the substrate together with the support and the image receiving layer. The method for producing an image display according to any one of the above.