JPS6217784A - Colored hologram transfer sheet - Google Patents

Abstract

PURPOSE:To permit reproduction of the titled sheets in a large quantity, the formation thereof to desired color tones and the easy sticking to articles by forming the transfer sheet of a light transmittable hologram layer subjected partly to light transmittable coloring on a strippable sheet, light reflective metallic layer, adhesive agent layer, etc. CONSTITUTION:The hologram sheet 20 is formed of the strippable sheet 1, the light transmittable hologram layer 2 of which the micro-rugged surface on said sheet is partly subjected to the light transmittable coloring, the light reflective metallic layer 4 in contact therewith, the adhesive agent layer 5, etc. The easy reproduction of the sheet 20 in a large quantity by an embossing mold, etc. is made possible by such constitution. The sheet is formable to desired color tones and is easily stickable to articles.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a colored hologram transfer sheet that is colored in any color and has an appearance that matches the intended use.

(Prior art) Holograms can reproduce three-dimensional images using light interference, and because they require advanced technology to manufacture, they are often installed in some credit cards as a means of preventing counterfeiting. Wooden covers of magazines, books, etc., pamphlets, calendars, record jackets, etc. for a novel appearance.
Attempts have been made to install them in paper and plastic packages, clothing, and the like.

In many cases, holograms are made of a colorless and transparent synthetic resin film with fine irregularities formed by embossing and a light-reflecting metal layer as a light-reflecting layer. The color of the entire hologram is determined by the light-reflecting metal layer, and since aluminum is normally used as the light-reflecting metal layer, it is limited to silver-gray, so depending on where it is used, it may not match the surrounding color. There were many.

Therefore, in an attempt to colorize the hologram, a rainbow hologram or a color hologram was formed. However, when the former rainbow hologram is reproduced using white light, the imaging position (imaging angle) is different for each wavelength component of the reproduced light, so that the image of each color can be clearly seen depending on the viewing position. However, when using a reflective type, it is unavoidable that the background color is silvery gray due to aluminum etc., and the latter type of color hologram requires the use of three types of light sources with different wavelengths during production. The desired color tone is obtained by mixing each color by performing multiplex recording and reproducing it again using three types of light sources. (e.g., Ar laser, wavelength 5145 angstroms) and a blue light source (e.g., Ar laser, wavelength 4
880 angstroms), and is complicated both in terms of production and reproduction, so there is a problem in mass producing it for general use. Furthermore, according to three-dimensional volume holography, it is possible to obtain natural-colored white light reproduction type holograms by utilizing the wavelength selectivity during reproduction, but this type of hologram cannot be reproduced in large quantities by embossing. Since this is not possible, there are problems with dissemination.

(Problem to be Solved by the Invention) Therefore, in the present invention, mass reproduction is possible using an embossed mold, and the color tone is appropriate depending on the purpose, and the color tone is matched to the surrounding area of the area to be used. Moreover, it is an object of the present invention to provide a colored hologram transfer sheet that can be easily adhered to various articles as required.

(Means for Solving the Problems) As a result of intensive research in order to solve the problems of the prior art as described above, the present inventor has made at least a portion of the light-transmitting layer of a reflective hologram transfer sheet into a light-transmitting layer. By coloring the
The present invention was completed based on the finding that the above-mentioned problems of the prior art can be solved.

That is, the present invention provides a release sheet, a light-transmitting layer provided on the release sheet and having a hologram minute unevenness shape,
It consists of a light-reflecting metal layer laminated on the finely uneven surface of the light-transmitting layer and an adhesive layer provided on the metal layer, and at least a part of the light-transmitting layer is colored to be transparent. This is a colored hologram transfer sheet characterized by:

The present invention will now be described in more detail with reference to the accompanying drawings, which schematically illustrate preferred embodiments of the colored hologram transfer sheet of the present invention.

The embodiment diagrammatically shown in FIG. 1 shows the basic structure of a colored hologram transfer sheet 20 of the present invention, in which a light-transmitting layer 2 having a hologram minute unevenness shape 3 is formed entirely or partially. This is an example colored in . Although not shown, the light-transmitting layer 2 may be colored in two or more different colors.

FIG. 2 shows the light-transmitting protective layer and/or
Alternatively, this is an example in which a peeled S layer 6 is provided and a support layer 7 is further provided on the light reflective metal layer 4.

FIG. 3 schematically shows a method for transferring the hologram transfer sheet 20 shown in FIG. 1 to an arbitrary transfer material 8. As shown in FIG.

First, an explanation will be given with reference to an example diagrammatically shown in FIG.
In this embodiment, a hologram layer 2 made of synthetic resin provided on a release sheet 1 is colored to be translucent as will be described later. The transparent layer 2 and other colored layers may be colored in multiple layers, or may be divided and colored into each color.

Such a release sheet 1 is a sheet-like material whose surface has releasability to the extent that it can easily be releasably attached to the hologram layer 2 or the protective layer and/or release layer 6 formed thereon as required. For example, plastic films such as polyethylene terephthalate, polypropylene, polyethylene, polyamide, etc., releasable films prepared by coating these films with a release agent, and even films such as those mentioned above. Kraft paper, glassine paper, parchment paper laminated with , or silicone-treated films or papers of these can all be used. The thickness of such a release sheet 1 is not particularly limited as long as it has appropriate strength and heat resistance.

The hologram layer 2 is preferably colored with a dye or a pigment, and examples of usable dyes include the following various dyes.

・G15 Direct dyes, acid dyes, salt dyes, mordant dyes, vat dyes, sulfur dyes, soluble architectural dyes, azoic dyes, reactive dyes,
Cationic dyes, disperse dyes, oxidation dyes, metal complex dyes, etc.

The dye used here is such that the light enters the colored hologram layer 2, is reflected on the surface of the light-reflective metal layer 4, and is emitted again, so that the light passes through the colored hologram layer 2 twice. Therefore, it is desirable that the light transmittance of the colored hologram layer 2 is not reduced too much and that the layer 2 does not become cloudy.Since the light transmittance varies depending on the thickness of the layer 2, it is preferable that the light transmittance of the colored hologram layer 2 is white. It is preferable that the light transmittance is 50% or more, and the haze value measured by a haze meter is 10%.
The following are preferable; if the white light transmittance is less than 50%, the hologram will not be clearly visible and the three-dimensional effect will be poor;
If the haze value measured by a haze meter exceeds 10%, a milky white cloud will appear in the background of the hologram, and the hologram will lose its sharpness, resulting in a poor three-dimensional effect.

In addition, the properties required of the dye include the material of the colored hologram layer 2, the method of forming the calendar 2, and the durability of the layer 2 during processing. When forming the hologram, a considerable amount of ultraviolet rays are irradiated after the formation of the micro-asperity shape 3 of the hologram, so it is preferable that the material does not discolor or fade when irradiated with ultraviolet rays.
When layer 2 is formed using an electron beam curable resin, it is preferable to use a dye that is less likely to fade or discolor when irradiated with an electron beam.

In addition, depending on the use of the colored hologram transfer sheet, for example, if it is to be applied to cards, clothing, stationery, etc., dyes that take into account physical properties such as chemical resistance, solvent resistance, plasticizer resistance, and washing fastness may be used. It is preferable to use

Taking into account various practical conditions such as those mentioned above, dyes in the form of oil-soluble metal complexes are preferred, for example,
Examples include type 1-2 azo metal complex dyes, type 1-1 azo metal complex dyes, metal phthalocyanine dyes, and organic base salts of these dyes, and more specifically, the following. .

Paris First Yellow #3104 and #3105
(both manufactured by Orient Kagaku Kogyo Co., Ltd.), and Zapon First Yellow GR (manufactured by BASF).

Eisen Metalon Yellow GRH and GRH Special (both manufactured by Hodogaya Chemical), Eisen Metalon Yellow HNRS (manufactured by Hodogaya Chemical), Orazole Yellow GLN (manufactured by Ciba Geigy), Paris First Orange #3206 (Orient Chemical) (manufactured by Kogyo), Zapon Fast Orange RE, G and RR (both R
manufactured by AS), Eisenspiron Orange GRH and 2
RH (manufactured by Hodogaya Chemical Co., Ltd.), Paris Fast Red #33
04 and #3305 (manufactured by Orient Chemical Industry Co., Ltd.),
Neo Zapon Red GE and Zapon First Red G
E (all manufactured by BASF), Eisenspiron Red BEH, GEH and GEH Suheshal (manufactured by Hodogaya Chemical), Orazole Red IIBL (manufactured by Ciba Geigy), Eisenmetalon Yellow) RH (manufactured by Hodogaya Chemical) , Zapon First Blue HFL and Zapon First Brown BE (all manufactured by BASF), etc.

Furthermore, pigments used for coloring the hologram layer 2 are broadly classified into organic pigments and inorganic pigments. Organic pigments include: (1) Neutral pigments, such as nitro pigments, azo pigments, anthraquinone pigments, phthalocyanine pigments, azine pigments, etc.; (2) Cationic pigments, such as trifluorocarbon pigments. Phenylmethane pigments, xanthine pigments, etc. (3) Anionic pigments, such as azo pigments and triphenylmethane pigments, and inorganic pigments such as cobalt pigments and iron pigments. Pigments include chromium pigments, manganese pigments, copper pigments, vanadium pigments, mercury pigments, lead pigments, sulfide pigments, selenide pigments, and the like.

As with dyes, the above pigments also have various properties such as light transmittance, haze value, fading during irradiation with ultraviolet rays and electron beams or heating, chemical resistance, plasticizer resistance, and washing fastness. Need to pay attention.

In particular, when using pigments, translucency is generally a problem, and it is necessary to consider the particle size of the pigment and the wettability and dispersion of the surrounding synthetic resin. If the wetness and dispersion are poor, clouding will occur. In this sense, the particle size of the pigment is very small, preferably 1/2 or less of the wavelength of light, and the pigment can be highly concentrated in a synthetic resin by coprecipitation, roll milling, extrusion, etc. It is preferable to use a masterbatch, master pellet, etc. that has improved dispersion, wetting, and dispersion.As an example of a pigment that has improved wetting and dispersion, for example, Shift Trans Yellow (BASF) manufactured by Taisei Kako Co., Ltd.
Microparticle iron oxide sold as Cicotrans L-2715D by the company (major axis 0.06 uLm, minor axis 0.02 p)
(m) (nitrified cotton chipped pigment) and HF Chip 4B (nitrified cotton chipped pigment of insoluble azo dye) manufactured by Taisei Kako Co., Ltd.

Various synthetic resins can be used as the synthetic resin colored with the above-mentioned dyes or pigments, as long as they can provide a hologram with minute irregularities.

Examples of synthetic resins include thermoplastic synthetic resins, such as polyvinyl chloride, acrylic resins (such as polymethyl methacrylate), polycarbonate, and polystyrene, and thermosetting synthetic resins, such as unsaturated polyester, melamine, and evo-format. Polyester (meth)acrylate [In this specification, the term (meth)acrylate is meant to include both acrylate and methacrylate. ], urethane (meth)acrylate, epoxy (meth)acrylate, polyether (meth)acrylate, polyol (meth)acrylate, melamine (meth)acrylate, or triazine (
Examples include meth)acrylate. Alternatively, the above thermoplastic synthetic resin and thermosetting synthetic resin may be used in combination.

Furthermore, as a synthetic resin, in particular, it is preferable to use a resin that can be molded into a hologram's microscopic uneven shape by heat pressing, and after molding, hardens to provide sufficient durability, such as so-called ultraviolet curable resins and electron beam curable resins. , thermosetting, naturally curing type reactive resins, etc. may be used.

In the present invention, resins that have a slow curing time and that are cured by ultraviolet rays or electron beams are suitable.

Specifically, for example, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, 1-butyl (meth)acrylate, isoamyl (meth)acrylate , cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, hexanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethy6 - propane di(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, ethylene glycol diglycidyl ether di(meth)acrylate, polyethylene glycol di(meth)acrylate , propylene glycol diglycidyl ether di(meth)acrylate, polypropylene glycol diglycidyl ether di(meth)acrylate, sorbitol tetraglycidyl ether tetra(meth)acrylate, and other monomers having a radically polymerizable unsaturated group can be used.

Furthermore, as an ultraviolet or electron beam curable resin having aging formability, a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (8) can be prepared by the methods (a) to (d) described in vk. Those into which radically polymerizable unsaturated groups are introduced are used.

(1) Monomer diN-methylol (meth) having a hydroxyl group
Acrylamide, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, etc.

(2) Monomers having a carboxyl group: (meth)acrylic acid, (meth)acryloyloxyethyl monosuccinate, etc.

(3) Monomer nigericidyl (meth) having an epoxy group
acrylate etc.

(4) Monomers having an aziridinyl group = 2-aziridinylethyl (meth)acrylate, allyl 2-aziridinylpropionate, etc.

(5) Monomer having an amino group = (meth)acrylamide, diaseptone (meth)acrylamide, dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate, etc.

(6) Monomer having a sulfone group = 2-(meth)acrylamide-2-methylpropanesulfonic acid, etc.

(7) Monomer having incyanate group = 2.4-toluene diisocyanate and 2-hydroxyethyl (meth)
Adducts of diisocyanates and radically polymerizable monomers having active hydrogen, such as 1 mol to 1 mol adducts of acrylate.

(8) Furthermore, in order to adjust the glass transition point of the above copolymer and the physical properties of the cured film, the above compound and the following monomers that can be copolymerized with this compound are added. can be copolymerized. Examples of such copolymerizable monomers include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, isobutyl (
meth)acrylate, t-butyl(meth)acrylate, isoamyl(meth)acrylate, cyclohexyl(
Examples include meth)acrylate, 2-ethylhexyl (meth)acrylate, and the like.

Next, the polymer obtained as described above is reacted by methods (a) to (d) described below to introduce a radically polymerizable unsaturated group, thereby obtaining an ultraviolet or electron beam curable resin. .

(a) In the case of a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as (meth)acrylic acid is subjected to a condensation reaction.

(b) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the monomer having the aforementioned hydroxyl group is subjected to a condensation reaction.

(c) In the case of a polymer or copolymer of a monomer having an epoxy group, incyanate group or aziridinyl group, the above-mentioned monomer having a hydroxyl group or monomer having a carboxyl group is subjected to an addition reaction.

(d) In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, a monomer having an epoxy group or a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic acid ester monomer The adduct may be reacted in a ratio of 1 to 1 mole of adduct.

Furthermore, the above-mentioned monomers and the above-mentioned aging-formable ultraviolet or electron beam curable resin may be mixed and used.

Furthermore, the above materials can be sufficiently cured by electron beam irradiation, but when curing by ultraviolet irradiation, benzoinethers JIi such as benzoquinone, benzoin, and benzoin methyl ether, and halogenated acetophenones may be used as sensitizers. A material that generates radicals when irradiated with ultraviolet rays can also be used.

The thickness of the colored synthetic resin layer, that is, the hologram layer 2, is 0.1 to 1100 JL, preferably 0.5 to 10 m.
It is.

On one surface of the colored synthetic resin 2, a hologram minute unevenness shape 3 is formed. This fine unevenness shape 3 is used to reproduce a hologram using reproduction light, and actually has a pitch O of 91 to 20 gm and a height difference of unevenness of o and oi to lpm. As will be described later, the minute unevenness shape 3 is an inverse shape of the minute unevenness shape of the mold surface of the hologram master created in advance, and is formed by a natural press or the like.

A light-reflecting metal layer 4 is laminated on the surface on which the minute unevenness shape 3 is formed. The light-reflective gold m layer gives light reflectivity to the colored hologram layer 2, and is composed of Cr, Ti
, Fe, Go, Old, Cu, Ag, Au, Ge,
AfL, Mg, Sb, Pb, Pd, Cd,
It is formed using metals such as Bi, Sn, Se, In, Ga, Rh, and their oxides, nitrides, etc. alone or in combination of two or more.

Among these metals, AIL, Cr, old, Ag, Au
etc. are particularly preferred.

The light-reflective metal layer 4 is formed on the surface of the colored hologram layer 2 by preparing the metal or alloy described above and applying it by sputtering, vacuum evaporation, ion blating, or electroplating. The film thickness of this light-reflective metal layer 4, which may be formed by a conventionally known method such as
0 to 10,000 angstroms, preferably 200 angstroms
~2.000 angstroms.

An adhesive layer 5 is formed on the surface of the light-reflective metal layer 4, and the adhesive layer 5 is made of any adhesive material that can adhere the hologram sheet to other objects. may be formed.

The embodiment shown in FIG. 1 shows a preferable example in which the adhesive layer 5 is made of a heat-sensitive adhesive.

As a preferable heat-sensitive adhesive for forming the adhesive layer 5, any adhesive used in conventionally known transfer sheets can be used, such as polyisoprene rubber, polyisobutyl rubber, styrene-butadiene rubber, butadiene rubber, etc. Rubber resins such as acrylonitrile rubber, (meth)acrylic acid ester resins, polyvinyl ether resins, polyvinyl acetate resins, vinyl chloride vinyl acetate copolymer resins, polystyrene resins, polyester resins, polyamide resins, Any adhesive such as a chlorinated olefin resin or a polyvinyl butyral resin can be used, and various additives such as a softener, a filler, and an anti-aging agent can also be added as necessary. Such adhesives are commercially available and can be easily used.

The light-reflecting metal layer of the hologram is coated by adding an organic solvent to the adhesive as needed to adjust the viscosity, and applying a conventional coating method such as roll coating, gou coating, knife coating, or gravure coating. 4 to form an adhesive layer 5.

The adhesive layer 5 formed in this way may have any thickness, but it is generally preferable to form it to a thickness corresponding to about 10 to 50 g/m'' (solid content). The colored hologram transfer sheet) 20 is completed.

The colored hologram transfer sheet 20 of the present invention basically has the above structure.

Referring now to FIG. 2, the embodiment illustrated schematically in FIG. 2 is similar to the colored hologram transfer sheet 20 of the embodiment of FIG.
This is an example in which a transparent protective layer 6 is provided between the hologram layer 2 and the release sheet 1, and in this example, the protective layer 6 is colored to be transparent. In practice, the protective layer 6 may be uncolored and the hologram layer 2 may be colored,
Further, both the hologram layer 2 and the protective layer 6 may be colored.

The protective layer 6 protects the hologram layer after transfer, and
It improves the releasability between the release sheet 1 and the hologram layer 2 during transfer, and if releasability is considered important, it can also be called a release layer. Of course, both a protective layer and a release layer may be provided.

Such a protective layer and/or release layer may be made of any material that is sufficiently translucent; for example,
Single substances, mixtures, and copolymers of cellulose resins, (meth)acrylic acid ester resins, vinyl chloride resins, vinyl acetate resins, urethane resins, melamine resins, polyester resins, etc., and various additions to these resins. These protective layers 6 may be layers formed by various coating methods from a paint made of a resin containing additives, and have a thickness of 0.05 to 10 gm.
The protective layer 6, which preferably has a thickness of about 11 to 5 pm, can be colored to make it translucent using the dyes or pigments described above in a conventional manner.

The heat-sensitive adhesive layer, which is the adhesive layer 5, is formed from a conventionally known heat-sensitive adhesive, that is, a resin that does not show tackiness at room temperature but becomes tackiness when heated.

The example shown in FIG. 2 is an example in which a support layer 7 is provided on the light-reflective metal layer 4 of the hologram transfer sheet 20 of the example shown in FIG.
Consists of polymer films such as polypropylene, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polyimide, poly(meth)acrylic ester, polystyrene, polybutyral, polycarbonate, and various synthetic resins used to form the aforementioned hologram layer. In addition to films, any material such as non-transparent paper, synthetic paper, aluminum plates, other metal plates, or laminates thereof may be used.

The example shown in FIG. 3 schematically shows a method of transferring a hologram layer to the transfer target material 8 using the hologram transfer sheet 20 shown in FIG. ) 20 onto the transfer material 8 with the heating roll 9, and then peeling off the release sheet 1, the hologram layer can be transferred onto the transfer material 8.

The transfer material 8 includes a plastic molded product, a piece of woven fabric,
All materials such as metal, wood, glass, ceramics, etc. can be used, but it goes without saying that the adhesive for forming the adhesive layer 5 should be appropriately selected depending on the material of the transferred material 8. Various conditions for transfer are similar to those of the prior art, but transfer temperatures that are high enough to deteriorate the uneven shape of the hologram must be avoided.

The above are preferred examples of the colored hologram transfer sheet of the present invention, but in these examples and other examples not illustrated,
During its manufacture, a protective layer 6, a hologram layer 2, a light reflective metal layer 4. When laminating the support layer 7 and the adhesive layer 5, an anchor layer (not shown) can be provided as necessary to improve the adhesive strength between them.

The anchor layer is a vinyl chloride-vinyl acetate copolymer, an acrylic resin, or a urethane resin.

Conventional anchor layers such as epoxy resins and polyester resins can be widely used. The film thickness of this anchor layer is 0.02~loILm, preferably 0.2~loILm.
It is 2 m.

Next, one example of a preferred method for manufacturing the colored hologram transfer sheet of the present invention will be explained with reference to FIG. First, a colored synthetic resin layer 2 is formed on a suitable release sheet 1 via a protective layer and/or a release layer (not shown) as required. For this purpose, it is preferable to apply a paint composition by mixing the dyes or pigments and synthetic resins described above using a solvent or in a heated and melted state by an appropriate method. Upper colored synthetic resin layer 2
A hologram original plate is brought into pressure contact with the surface of the hologram original plate, and the minute unevenness shape 3 on one side of the hologram original plate is transferred.

At this time, when the synthetic resin constituting the colored synthetic resin layer 2 is thermoplastic, the transfer may be performed, for example, by a hot press method, and the hologram master may be removed by gradual cooling.

Alternatively, when the synthetic resin constituting the colored synthetic resin layer 2 is an ultraviolet curable resin or an electron beam curable resin, the synthetic resin is cured by irradiating ultraviolet rays or electron beams after the hologram master is pressed.

However, when using ultraviolet curable resins or electron beam curable resins as described above, the conventional types of ultraviolet curable resins and electron beam curable resins are generally in a liquid state, so they cannot be peeled off. When applied to the sheet 1, it becomes extremely sticky; therefore, a hologram forming film made by applying a conventional ultraviolet ray or electron beam curable resin onto a release sheet 1 cannot be rolled up and stored; In each case, an ultraviolet curable resin must be applied onto the release sheet l immediately before contact with the hologram master, and then a hologram must be formed.

Therefore, in the present invention, the minute unevenness shape 3 of the hologram
Although it can be made by the method described above, it is most preferable to make it by the following method.

That is, a colored UV curable resin that does not become sticky at room temperature, a colored electron beam curable resin, or a colored UV curable resin is placed on the release sheet l via a protective layer and/or a release layer if necessary. A hologram forming film provided with a thermosetting resin layer and a hologram original plate on which interference fringes corresponding to the wavefront of light from an object are formed in a concave-convex pattern on the surface are coated with a colored ultraviolet curable resin of the film. Alternatively, the colored electron beam curable resin is brought into contact with the hologram original plate, and is pressed under heating conditions to form unevenness on the resin, and with the original plate and film in close contact, ultraviolet rays or electron beams are applied for hologram formation. By irradiating the film or applying heat, the resin is cured to create the hologram layer 2 in which the micro-irregularities 3 of the hologram layer are formed.

According to this method, since the colored synthetic resin layer 2 after forming the hologram is cured, there is no need to heat and cool the hologram master and the hologram forming film multiple times, and therefore, the unevenness of the hologram master is eliminated. can reduce deterioration. Further, after the hologram original plate and the hologram forming film are maintained in a heated state and pressed together to form irregularities on the film, the pressed state can be immediately released, and therefore a cooling step is not necessarily required. Furthermore, the hologram-forming film can be rolled up and stored, which simplifies the hologram duplication process and enables mass production.

When heat-pressing the hologram original plate and the hologram-forming film, a heat-pressing means such as a heating roll can be used, and the temperature of the heating roll depends on the type of resin to be used, the material of the base film, the thickness, etc. The temperature varies greatly depending on the temperature, but in general, a temperature of 100 to 200°C is appropriate. Further, it is preferable that the hologram original plate and the hologram forming film are pressed together under a pressure of 0.1 Kg/crn' or more.

At this time, when irradiating ultraviolet rays or electron beams, the irradiation intensity may be such that the film with the hologram unevenness of the hologram original plate is peeled off from the plate and then irradiated again to sufficiently harden the resin. is preferable, ultraviolet light,
The amount of electron beam irradiation needs to be determined appropriately depending on the resin used.

In addition, when molding a hologram using a colored UV-curable or electron beam-curable resin that is not sticky at room temperature and has moldability, it must be molded under heat and pressure in the same way as when using conventional general thermoplastic resin. The unevenness of the hologram may be formed by molding the unevenness of the hologram, and after cooling in that state, the film may be peeled off and the hologram may be duplicated.Then, the resin may be cured by irradiation with ultraviolet rays or electron beams. A metallic layer 4 is applied. As described above, this light-reflective metal layer 4 can be provided on the hologram by the ion blating method, the vacuum evaporation method, or the like.

Next, the above-described adhesive layer 5 is provided on the surface of the light-reflective metal layer 4, thereby completing the hologram transfer sheet of the present invention.

(Function/Effects) The colored hologram transfer sheet h20 of the present invention has the following effects because the synthetic resin layer 2 and/or the protective layer 6 on which the hologram minute irregularities 3 are formed are colored in advance. ing.

(1) The hologram transfer sheet can have any color tone, and can be harmonized with the color tone of the surroundings in which the hologram transfer sheet is used.

(2) The manufacturing itself can be carried out using existing coating equipment, molding equipment, curing equipment (ultraviolet or electron beam irradiation equipment, or heating stage @
) can be used to efficiently perform large quantities.

(3) By pasting the colored hologram transfer sheet of the present invention on ID cards, cash vouchers, etc., counterfeiting can be made technically difficult, and the color tone of the colored hologram transfer sheet and cards, cash vouchers, etc. By matching the color tone of the base material, the attachment position of the colored hologram transfer sheet is made unclear, and furthermore, the image of laser-reproduced holograms such as Fresnel holograms recorded within the colored hologram transfer sheet remains as recording noise. , even if the recorded position is implied, coloring can make the recorded position unclear and increase the anti-counterfeiting effect.

(4) The colored hologram transfer sheet as described above is
It can be easily attached to and peeled off from various articles as needed.

EXAMPLES The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

Example 1 A cured acrylic resin (manufactured by Soken Kagaku Co., Ltd., Thermolac 5T104) was added as a protective layer and release layer to a polyethylene terephthalate film with a thickness of 50 ILm as a release sheet.
was applied to a thickness of 0.5 pm, and on top of this, trimethylolpropane triacrylate 1 was added as a colored synthetic resin.
00 parts by weight, metal-containing red dye (manufactured by Ciba Geigy, CO complex salt-based metal-containing azo dye, Orazole Red G) 3
A hologram-forming film was prepared by dissolving parts by weight and applying the solution to a thickness of 2 pLm.

Next, a mold in which a hologram is recorded in the form of minute irregularities is pressed and adhered to the resin surface of this hologram forming film as a hologram original plate, and in this state it is exposed to an electron beam of intensity of 175 KV and 10 Mrad from the film surface. 5m
The hologram forming resin was cured by irradiating the electron beam at a speed of /win.

Next, the film on which this hologram was formed was peeled off from the hologram master plate, aluminum was vacuum-deposited to a thickness of 800 angstroms on the uneven surface, and a heat-sensitive adhesive was applied to the deposited surface using a gravure coating method. It was applied to a dry thickness of about 30 gm and dried to produce a red colored hologram transfer sheet of the present invention.

Example 2 The same procedure as in Example 1 was used, except that 4% by weight of Irgacure 184 (manufactured by Ciba Geigy) was added as a sensitizer to 100 parts by weight of trimethylolpropane triacrylate as the hologram-forming resin. A hologram forming film was prepared in the same manner as above, and 80
The hologram-forming resin was cured by irradiating ultraviolet light through a position 10 cm below the W/C layer mercury lamp at a speed of 2 m/in.

Furthermore, aluminum was vacuum-deposited by a method similar to that shown in Example 1, and then a solution of a heat-sensitive adhesive was applied and dried by a roll coating method to a thickness of 25 g, m when dry. A colored hologram transfer sheet of the present invention was obtained.

Example 3 The following composition was refluxed for 6 hours to perform copolymerization.

Methyl methacrylate) 284 parts by weight 2-hydroxyethyl methacrylate 130 parts by weight Ethyl acetate 1,100 parts by weight α, α'-7 Zobisisobutyronitrile 2 parts by weight Next, 0.1 parts by weight was added to the obtained reaction product. After adding 100 parts by weight of paramethoxyphenol to stop the reaction, 100 parts by weight of a 1 mol to 1 mol adduct of 2-hydroxyethyl acrylate) and 2.4-)luene diisocyanate was added, and then dibutyltin silauri 5 parts by weight of Rate was added, and the mixture was reacted at 80° C. for 5 hours while blowing dry air.

After cooling the reaction solution to room temperature, 15 parts by weight of an ultraviolet sensitizer (Irgacure 184, manufactured by Ciba Geigy) was added.
Dissolve evenly and add yellow master paste (transparent iron oxide master paste).

3 parts by weight of Shift Trans Yellow (manufactured by Taisei Kako Co., Ltd.) was uniformly dissolved to obtain a yellow ultraviolet curable coating material.

In the same manner as in Example 1, polyethylene terephthalate was provided with a protective layer/peeling layer with a thickness of 0.5 gm, and then the material obtained above was dried and uniformly coated to a thickness of 2.5 gm. It was coated to form a hologram forming film. This coated film is not sticky at room temperature and can be stored in a rolled state.

Next, the resin surface of this coated film and the uneven surface of the mold on which the hologram is recorded in an uneven shape are superimposed,
The mold and the coated film were brought into close contact by heating and pressurizing at 0°C and a pressure of 20 kg/cm' using a 1'-/broll.

Next, with these in close contact, 80W/a from the film side.
Under lOc of an ultraviolet lamp with an output of m, 1m/
The coated resin was cured by irradiating ultraviolet rays at a speed of 300 nm. After that, the film was peeled off from the mold.
Next, a colored hologram transfer sheet of the present invention was prepared in the same manner as in Example 1.

As described above, by using this method, a colored hologram transfer sheet could be produced extremely efficiently.

[Brief explanation of drawings]

1 and 2 schematically show cross sections of the colored hologram transfer sheet of the present invention, and FIG. 3 schematically shows a transfer method using the colored hologram sheet of FIG. 1. l; Release sheet 2: Hologram layer 3; Fine unevenness shape 4; Light reflective metal layer 5: Adhesive layer 6; Protective layer and/or release layer 7 supported layer 8: Transferred material 9; Roll

Claims (4)

[Claims] (1) A release sheet, a light-transmitting layer having a hologram micro-irregularity provided on the release sheet, a light-reflecting metal layer laminated on the micro-irregularity surface of the light-transmitting layer, and the metal layer. 1. A colored hologram transfer sheet comprising an adhesive layer, wherein at least a part of the light-transmitting layer is colored to be transparent. (2) The coloring according to claim (1), wherein the light-transmitting layer is composed of a protective layer and/or a release layer and a hologram layer, and at least one of the layers is colored to be transparent. Hologram transfer sheet. (3) The colored hologram transfer sheet according to claim (1), wherein the adhesive layer is a heat-sensitive adhesive layer. (4) The colored hologram transfer sheet according to claims (1) to (3), wherein the light-reflective metal layer is a light-reflective metal vapor-deposited layer.