JPS61272772A - Transparent hologram formed body - Google Patents

Abstract

PURPOSE:To obtain the titled body having the display effect in the display part together with the hologram effect in the hologram layer by constituting the titled body from the substrate, the transparent hologram and the display part provided at a downward part of the transparent hologram. CONSTITUTION:The display part 2 is provided at an optional position of the substrate 1. The transparent hologram 3 is provided at an upper part of the display 2 through an adhesive layer 7. If the transparent hologram 3 is a relief hologram, the thin film 6 is provided on the relief formed surface 5 of the hologram forming layer 4 whereby the thin film layer 6 may be developed the hologram effect and has a quality of not covering up the display part 2 lying in the underlayer of the film 6. The thin film 6 is comprised a transparent material having a refractive index different from that of the hologram forming layer and a reflactive thin metallic film having <=200Angstrom thickness. The hologram forming layer 4 is usually constituted by a resin. The hologram plate is used to a press die, whereby a relief pattern of the hologram plate is copied on the surface of a resin sheet for forming the hologram to form the hologram forming layer.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to improvement of a hologram forming body, and more specifically, it has a transparent hologram layer that does not obstruct visual viewing of the display part, and improves the display effect of the display part. The present invention relates to a transparent hologram forming body that also has a hologram effect of a hologram layer.

[Conventional technology]

Holography is a new technology that records the wavefront of light from an object, and holograms created using this technology can reproduce three-dimensional images and also allow multiple recording. Taking advantage of the unique appearance and novelty of holograms, holograms are formed on supports such as credit cards, cashier cards, book covers, record jackets, etc. by methods such as transfer, pasting, and direct formation. Various attempts are being made.

[Problem that the invention seeks to solve]

Supports such as cards and book covers usually have display parts such as letters and pictures on their surfaces, and in this case, the position at which the hologram is formed becomes an issue. Traditionally, characters,
It was common to provide holograms in areas where there was no display area such as a pattern. The reason is that holograms installed on supports such as cards are usually reflective holograms, so the hologram itself lacks transparency. This is because it obstructs visual inspection and reduces the display effect.

For example, in a relief hologram, which is a type of hologram, a reflective metal thin film (for example, aluminum mm) is formed on the relief forming surface by vapor deposition (the film thickness is usually 10 mm).
00A), and when this relief hologram is provided on a display section such as characters, the display section cannot be seen from the outside because the light waves propagating in the metal thin film are attenuated in the traveling direction.

Therefore, in the past, holograms had to be placed in areas where there were no display parts such as characters, which resulted in: 1) restrictions on the formation position of the holograms, resulting in a lack of freedom in design; 2) therefore, Depending on the arrangement and size of the display parts on the support, it was difficult to form a hologram, or there was no choice but to allow the display effect of the display parts to be partially diminished.3 ) In order to more reliably prevent counterfeiting of cards and cash vouchers, it is desirable to form holograms on display parts such as numeric displays, magnetic recording parts, and stamp parts. There were drawbacks such as the lack of accurate means to prevent counterfeiting due to the difficulty of counterfeiting.

Furthermore, since the reflective metal film is usually silvery white and has high brightness, there is a problem in that it gives a great sense of discomfort when a hologram is provided on various supports such as cards.

[Means for solving problems]

The transparent hologram forming body of the present invention is characterized by comprising a support, a transparent hologram provided on the support, and a display section provided at least at a lower position of the transparent hologram.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of the hologram forming body of the present invention, in which 1 is a support, a display section 2 is provided at an arbitrary position of the support 1, and an upper position of the display section 2 is provided. A transparent hologram 3 is provided.

In the present invention, a transparent hologram refers to a hologram that has the property of not hiding the display portion, that is, has transparency, and thus has the function of a hologram even though it is transparent itself. Since the above-mentioned "transparent" means that the display portion is not hidden, translucent ones are also included in the present invention.

The transparent hologram 3 may be composed of only a hologram forming layer, or may be composed of a hologram forming layer provided with a thin film layer that increases the hologram effect. An example of the structure of the present invention in which a thin film layer is provided is shown in FIG. This figure shows a configuration example in which the transparent hologram is a relief hologram, in which a thin film layer 6 is provided on the relief forming surface 5 of the hologram forming M4. 7 is an adhesive layer.

The aspect of providing the thin II2 layer in the hologram forming layer is not limited to the case of relief holograms, but is similarly applicable to other holograms. The FJ film layer can be made of any material as long as it can produce a hologram effect and does not hide the underlying display area; for example, a transparent material with a different refractive index from the hologram forming layer, a reflective metal thin film with a thickness of 200 Å or less, etc. Examples include layers. In the former case, the refractive index may be larger or smaller than that of the hologram forming layer, but the difference in refractive index is preferably 0.1 or more, more preferably 0.5 or more. According to experiments conducted by the present inventors, it is optimal that the value is larger than 1.0. By providing transparent thin film layers having different refractive indexes in this way, a hologram effect is produced, and the display portion of the lower layer is not obscured. In the latter case, although it is a reflective metal thin film, the thickness is 200 mm.
Since it is less than Å, the transmittance of light waves is high, and therefore, it exhibits the effect of producing a hologram effect as well as the effect of not hiding the display area. In other words, when a light wave passes through a reflective metal thin film, its amplitude rapidly decreases at exp (-2πK) per wavelength, so if the film thickness exceeds 200, the transmittance becomes quite small. . Therefore, by setting the film thickness to 200 Å or less, the transmittance becomes sufficient and a hologram effect can be produced. Furthermore, by setting the film thickness to 200 Å or less, the unnatural appearance due to the high brightness of silvery white seen in the past can be eliminated.

For example, the following materials (1) to (6) can be used as the material for the thin film layer.

(1) Transparent continuous thin film with a higher refractive index than the hologram forming layer.There are two types of transparent thin films: those that are transparent in the visible region and those that are transparent in the infrared or ultraviolet region. They are shown in Table 2. In the table, n indicates the refractive index (hereinafter, (2
) to (5) as well).

Table 1 Transparent material in the visible region Table 2 Transparent material in the infrared or ultraviolet region (2) Transparent ferroelectric material having a higher refractive index than the hologram forming layer Shown in Table 3.

Table 3 (3) Transparent fast-reading fill with a lower refractive index than the hologram forming layer! It is shown in Table 4.

Table 4 (4) Reflective metal thin film with a thickness of 200A or less Reflective gold! The thin film has a complex refractive index, where n* is n*-n
−iK. n represents the refractive index, and K represents the absorption coefficient.

The materials of the reflective metal thin film used in the present invention are shown in Table 5, and the above n and K are also shown in the same table.

Other materials in Table 5 include S n % I n s T
e% TisFe, Co, Zn-Ge,
, P b 1Cd % B t 1Sa, Ga, Rh, etc. can be used. Further, oxides, nitrides, etc. of the metals listed above can also be used, and metals, oxides, nitrides, etc. thereof can be used alone or in combination of two or more of them.

1. (5) Resin having a different refractive index from the hologram forming layer The hologram forming layer may have a larger or smaller refractive index, examples of which are shown in Table 6.

Table 6 In addition to the above, general synthetic resins can be used, but resins that have a large refractive index difference with the hologram forming layer are particularly preferred.

(6) A laminate made by appropriately combining the materials listed in (11) to (5) above. The materials listed in +11 to (5) above may be combined arbitrarily, and the vertical positional relationship of each layer in the layer structure may also be selected arbitrarily. Ru.

Among the thin film layers (11 to (6)) mentioned above, the thickness of the thin film layer (4) is 200 Å or less', but the thickness of the thin film layers of +11 to (3), (5), and (6) is thin film. Any transparent region of the material that forms the material is sufficient, and generally 1O to 1ooooo
The number of people is preferably 100 to 5000 people.

As a method for forming the thin film layer 6 in the hologram formation N4, when the thin film layer 6 is made of the material of (1) to (4) above, vacuum evaporation method, sputtering method, reactive sputtering method, ion blating method, General thin film forming means such as electroplating can be used, and when the thin film layer 6 is made of the material mentioned in (5) above, general coating methods can be used. When the thin film layer 6 is made of the material (6) above (Wi layer), the above-mentioned means, methods, etc. can be used in combination as appropriate.

In the case of the material (5) above, it does not have to be a thin film as long as it is a transparent material, and as another embodiment of the present invention, a resin layer having a thickness greater than a thin film may be provided in the hologram forming layer.

When a transparent hologram is composed only of a hologram forming layer, it can be constructed as a reflection hologram due to the difference in refractive index between air and the hologram forming resin.

When the transparent hologram is a relief hologram and the hologram forming layer 4 is provided with the thin film layer 6, the display section 2 and the support 1 may be located on the relief forming surface side or may be different from the relief forming surface. It may be located in the opposite position, and either configuration is applicable to the present invention. Furthermore, in holograms other than relief holograms, the display section 2 and the support 1 may be located on the side where the thin film layer is formed, or may be located on the side opposite to the formation surface.

In the case where the transparent hologram is composed of only a hologram forming layer and the transparent hologram is a relief hologram, the display part and the support may be provided so as to be located on the opposite side from the relief forming surface. desirable.

Furthermore, in the case of a relief hologram, the thin film layer 6 may be provided so as to fill the relief forming surface (i.e., one surface is flat), or may be provided so as to follow the relief forming surface (i.e., one surface is flat). (One side will be uneven).

The hologram forming layer 4 is generally made of resin, and the hologram forming resin layer may have a single layer structure or a multilayer structure (for example, a hologram forming resin is provided on a base film, or the hologram forming resin itself has a laminated structure). It may also be the one you have.

The hologram forming layer may be a planar hologram or a volume hologram (in the case of a planar hologram, a relief hologram is preferred from the viewpoint of mass production and cost; other examples include a Fresnel hologram, a Fraunhofer hologram, a lensless Fourier transform hologram, an image hologram, etc.) Laser reproduction holograms, and white light reproduction holograms such as Lippmann holograms and rainbow holograms, as well as color holograms, computer holograms, hologram displays, multiplex holograms, holographic fixed stereograms, holographic diffraction gratings, etc. that utilize these principles are used. be able to.

Photosensitive materials for forming holograms for recording interference fringes include silver salts, dichromate gelatin, thermoplastics, diazo photosensitive materials, photoresists, ferroelectrics, photochromics materials, thermochromics materials, and Calcoken. Glass etc. can be used.

In the present invention, the material of the hologram forming layer includes polyvinyl chloride, acrylic (e.g. MMA), polystyrene,
Thermoplastic resins such as polycarbonate, unsaturated polyester, melamine, epoxy, polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, polyether (meth)acrylate, polyol (meth)acrylate, melamine (meth)acrylate
A cured thermosetting resin such as acrylate or triazine-based acrylate, or a mixture of the above-mentioned thermoplastic resin and thermosetting resin can be used.

Further, as the material for the hologram forming layer of the present invention, thermoformable substances having radically polymerizable unsaturated groups can be used, and there are two types of thermoformable substances.

111 A polymer having a radically polymerizable unsaturated group with a glass transition point of 0 to 250°C, more specifically, a polymer obtained by polymerizing or copolymerizing the following compounds 1 to 2, which will be described later. Methods (a) to (d)
It is possible to use those into which radically polymerizable unsaturated groups have been introduced.

■ Monomers having hydroxyl groups: N-methylolacrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl acrylate, 2-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroxy-3-phenoxypropyl acrylate, etc.

■ Monomers with carboxyl groups such as nialic acid, methacrylic acid, acryloyloxyethyl monosuccinate, etc.

■ Monomers such as nigericidyl methacrylate having epoxy groups.

(2) Monomers having an aziridinyl group: 2-aziridinylethyl methacrylate, allyl 2-aziridinylpropionate, etc.

■ Monomers containing amino groups such as niacrylamide, methacrylamide, diaseptacrylamide, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, etc.

(2) Monomers having a sulfone group: 2-acrylamido-2-methylpropanesulfonic acid, etc.

(2) Monomer having an isocyanate group: an adduct of a diisocyanate and a radically polymerized monomer having active hydrogen, such as a 1 mol to 1 mol adduct of 2.4-toluene diisocyanate and 2-hydroxyethyl acrylate.

■Furthermore, in order to adjust the glass transition point of the above copolymer and the physical properties of the cured film, the above compound can be copolymerized with the following monomers that can be copolymerized with this compound. It can also be polymerized.

Examples of such copolymerizable monomers include methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, t-butyl acrylate, Examples include t-butyl methacrylate, isoamyl acrylate, isoamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, 2-ethylhexyl acrylate, and 2-ethylhexyl methacrylate.

Next, a hologram-forming resin can be obtained by reacting the polymer obtained as described above by methods (a) to (d) described below to introduce a radically polymerizable unsaturated group.

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

(b) In the case of a polymer or copolymer of monomers having carboxyl groups or sulfone groups, the aforementioned monomers having hydroxyl groups are subjected to a condensation reaction.

(c) In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group, or an 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 A 1:1 mole ratio of the adducts is subjected to an addition reaction.

In order to carry out the above reaction, it is preferable to add a trace amount of a polymerization inhibitor such as hydroquinone and carry out the reaction while blowing dry air.

(2) A compound having a melting point of 0 to 250°C and having a radically polymerizable unsaturated group, specifically stearyl acrylate, stearyl methacrylate, triacrylisocyanurate, cyclohexanediol diacrylate,
Examples include cyclohexanediol dimethacrylate, spiroglycol diacrylate, and spiroglycol dimethacrylate.

Further, in the present invention, the above (11 and (2)) can be used as a mixture, and a radically polymerizable unsaturated monomer can also be added to them.

This radically polymerizable unsaturated monomer improves crosslinking density and heat resistance when irradiated with ionizing radiation, and in addition to the above-mentioned monomers, ethylene glycol diacrylate, ethylene glycol dimethacrylate, Polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, hexanediol diacrylate, hexanediol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, pentaerythritol tetra Acrylate, pentaerythritol tetramethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, ethylene glycol diglycidine ether diacrylate, ethylene glycol diglycidyl ether dimethacrylate, polyethylene glycol dimethacrylate Glycidyl ether diacrylate, polyethylene glycol diglycidyl ether dimethacrylate, propylene glycol diglycidyl ether diacrylate, propylene glycol diglycidyl ether dimethacrylate, polypropylene glycol diglycidyl ether diacrylate, polypropylene glycol diglycidyl ether dimethacrylate, sorbitol tetraglycidyl ether Tetraacrylate, sorbitol tetraglycidyl ether tetramethacrylate, etc. can be used, and 0.00 parts by weight of the solid content of the copolymer mixture described above can be used.
It is preferable to use 1 to 100 parts by weight. In addition, the above materials can be sufficiently cured by electron beams, but when curing by ultraviolet irradiation, benzoin ethers such as benzoquinone, benzoin, and benzoin methyl ether, halogenated acetophenones, and biacyl can be used as sensitizers. It is also possible to use materials that generate radicals when irradiated with ultraviolet rays, such as.

The hologram forming layer can be obtained by a conventionally known method. For example, when the transparent hologram is a relief hologram, a hologram master on which interference fringes are recorded in the form of unevenness is used as a press mold, and the hologram is formed on this master hologram. A hologram forming layer can be obtained by placing a resin sheet for hologram forming, and applying heat and pressure to the two using a means such as a heating roll, thereby replicating the uneven pattern of the hologram original on the surface of the resin sheet for hologram forming.

The display section 2 refers to all things that can be visually appealing,
In terms of content, it may or may not have a specific meaning, and in terms of functionality, it may be for the purpose of design, external decoration, or information. Examples of such a display section include: , images such as letters, numbers, symbols, figures, patterns, background patterns, etc.5 barcodes, OCR, MI C
Device-read information such as R, 7 toteda, etc.; personal identification information such as fingerprints, facial photographs, and signatures; identification marks such as registered trademarks; and authentication displays such as company name seals and registration seals. In addition, the display section is
It may be a continuous printed layer provided by solid printing of any hue.

Display means for the display section include 1) printing, 2) silver halide photography,
Blueprint, diazo photograph, dichromate gelatin photograph, photoresist, photochromy, electrophotography, thermomagnetic recording, thermoplastic recording, 3) Display by means of hard copy, such as discharge record, electrolyte record, electrostatic record , electrical sensitive records such as energization records;
Pressure-sensitive recording using carbon or non-carbon; physical or chemical heat-sensitive recording; 4) laser recording, holography, magnetic recording, engraving, embossing, papermaking method display, handwritten display, liquid crystal display, etc. .

The display section 2 may be provided on the support 1 as shown in FIGS. 3 and 6, or may be provided on the surface of the thin film N6 (not particularly shown).
When the support 1 is provided with the 0 display section 2, which may be provided on the bottom surface), the display section 2 may be provided on the top surface of the support 1 as shown in FIG. 3, or as shown in FIG. The display section 2 may be provided inside the support 1 , or may be provided both on the top surface and inside the support 1 .Furthermore, the display section 2 is not limited to the case where it is provided only at the bottom of the transparent hologram 3 . , as shown in FIG. 6, can also be provided at the upper position of the transparent hologram 3.

Furthermore, the transparent hologram 3 may be further provided with a protective layer such as a protective plate, a protective film, or a protective coating layer. For example, in the case of a three-layer laminated plastic card, a picture layer is placed on a vinyl chloride core sheet, and a transparent vinyl chloride oversheet is layered on top and bottom of the sheet with a transparent hologram placed on top and heat-sealed. It may also be used as a plastic card with a transparent hologram.

Materials for the support 1 include Japanese paper, kraft paper, Kurupak paper, crepe paper, cardboard paper, high-quality paper, OCR paper, MICR paper, foam paper, coated paper, art paper,
Synthetic paper, etc. Covering materials such as paper cloth paper, cloth cloth paper, leather, etc.; Polyvinyl chloride, thermoplastic polyester, polymethacrylate, polyvinyl acetate, polyacrylate, polyethylene, polypropylene, polystyrene, polyvinyl chloride, Polyacrylonitrile, polycarbonate, polyamide, polyurethane, polyimide, cellulose resin, synthetic rubber resin, natural rubber resin, phenol resin, urea resin, melamine resin, epoxy resin, amide resin, unsaturated polyester resin, and their appropriate properties. Plastics such as mixed resins and copolymer resins made of various combinations; Rubbers such as synthetic rubber and natural rubber; Copper, iron, aluminum, tin, lead, and alloys made of appropriate combinations thereof; Cotton, cotton, synthetic fibers, Fibers such as glass siam and nonwoven fabrics; wood and other wood-based materials; glass; composite materials made of appropriate combinations of the above-mentioned various materials, etc. are used.

The support 1 can be in the form of a paper, a plate, a sheet, a film, a foil, etc., and the shape and thickness can be arbitrarily selected. The support 1 may be transparent or opaque, and therefore the transparent hologram 3 may be a reflection hologram or a transmission hologram.

In order to provide the transparent hologram 3 on the support 1, a hologram transfer foil may be formed and this may be provided using a transfer method, or a hologram label may be formed and this may be provided using an adhesive method. An example of a good hologram transfer foil structure is shown in FIG. The hologram transfer foil 8 shown in the figure is constructed by laminating a protective layer lO, a hologram forming layer 4, a thin film layer 6, and an adhesive layer 7 on a base film 9 in this order. Examples of the material for the base film 9 include polymer films such as polyethylene terephthalate, polyimide, polymethyl methacrylate, polystyrene, polyvinyl butyral, and polycarbonate, synthetic paper, metal films such as iron, and laminates thereof. The protective layer 10 includes the base film 9 and the hologram forming layer 4
The material is acrylic resin, cellulose resin, vinyl resin, polyester. Examples include resins such as resins, urethane resins, olefin resins, amide resins, epoxy resins, etc., and the film thickness thereof is 0.1 to 10μm,
The thickness is preferably 0.5 to 5 μm.

The material for the adhesive layer 7 is widely used as conventional adhesives such as acrylic resin, vinyl resin, polyester resin, urethane resin, amide resin, epoxy resin, rubber resin, and ionomer resin. (Can be used, and the film thickness is 0.1 to 50 μm, preferably 1 to 10 μm.
It is preferable that the hologram forming layer 4 and the protective layer l
In order to increase the adhesion between the hologram forming layer 4 and the durability of the hologram forming layer 4, an overprint layer made of a curable acrylic resin, cellulose resin, vinyl resin, etc. is applied to the hologram forming layer 4 and the protective layer 10. Furthermore, in order to improve the adhesion between the thin film layer 6 and the adhesive layer 7, an anchor layer made of vinyl chloride-vinyl acetate copolymer, acrylic resin, urethane resin, etc. may be provided between the thin film layer 6 and the adhesive layer 7. It may also be provided between the thin film layer 6 and the adhesive layer 7.

The hologram transfer foil 8 configured as described above is bonded with adhesive N7.
The transparent hologram 3 is transferred to the support 1 by superimposing it on the support 1 so that it is in contact with the surface of the support 1, and peeling off the base film 9 by applying heat and pressure (FIG. 3).
, such a configuration is, for example, as shown in FIG.
The transparent hologram forming body of the present invention comprises a support 1 configured as a time deposit certificate, a display section 2 printed with a bank name and a certification seal, and a transparent hologram 3 provided on the display section 2. Applies to the examples.

An example of the structure of a hologram label is shown in FIG.

The hologram label 11 shown in the figure is a base sheet 12
On top, hologram forming layer 4, fs film J16, adhesive layer 1
3 and release paper 14 are laminated in this order. The base sheet 12 has the function of protecting the hologram forming layer 4 and increasing the overall mechanical strength, and its material is as follows:
Polyvinyl chloride, polyester acrylic resin, epoxy resin, amide resin, urethane resin, etc. are used, and the film thickness is preferably 10 to 500 μm.

As the material for the adhesive layer 13, common adhesives such as acrylic and rubber adhesives are widely used. This adhesive is made by adding a tackifier to an elastic body, and the elastic body includes polyisoprene rubber, polyisobutyl rubber, SBR, butadiene rubber, etc.
Rubbers such as acrylonitrile rubber, acrylic esters, polyvinyl ethers, etc. are listed, and tackifiers include polyterpene resins, gum rosin, rosin esters and rosin derivatives, oil-soluble phenol resins, coumaron indene resins, and petroleum-based carbonized resins. Examples include hydrogen.

In addition to the tackifier, a softener, filler, anti-aging agent, etc. may be added.The thickness of the adhesive layer 13 is preferably 0.1 to 50 μm.

As the release paper 14, a material obtained by coating a base material such as paper or film with silicone resin, wax, paraffin, etc. is used.

In order to increase the adhesiveness between the thin film N6 and the adhesive layer 13,
An anchor layer similar to that in hologram transfer foil may be provided between the thin film layer 6 and the adhesive layer 13. The hologram label 11 constructed as described above is cut to an appropriate size, and a release paper 14 is attached. A transparent hologram 3 can be provided on the support 1 by peeling it off and pasting it on the support 1 via the adhesive layer 13 (FIG. 6). Such a configuration is shown in FIG. 5, for example. The transparent type of the present invention comprises a support l configured as a magnetic card, a display part 2 displaying the name of the magnetic card holder, etc., and a transparent hologram 3 provided on the display part 2. This applies to the embodiment of the hologram forming body.

In the embodiment in which the display section 2 is provided on the support 1, the display section 2 is not limited to the case where it is provided on the support 1 in advance. An indicator 2 is provided at a lower position or inside the agent layer 13, and when the hologram transfer foil 8 and the hologram label 11 are transferred and attached to the support l, the indicator 2 is transferred and attached together with the transparent hologram 3. It can also be configured to be worn. In addition, the transparent hologram is not limited to being provided on a smooth surface, but may also be provided on an uneven surface, such as on a display section with convex embossed characters, etc. Furthermore, the hologram itself may be
In the present invention, the support (having a display portion) on which a transparent hologram is to be formed can be any article, product, or product, which may be embossed. Therefore, specific examples of the transparent hologram formed body of the present invention include cartons, containers, bags, cassette cases, cassette halves,
Packages such as floppy cases and wrapping paper; stock certificates, checks, bills, securities, certificates, bankbooks, train tickets, horse racing tickets, stamps, stamps, and other cash cards; cash carts, credit cards, membership cards, greeting cards; Cards such as cards, postcards, business cards, IC cards; Others, forms, envelopes, tags, calendars, posters, pamphlets, passports, POP supplies, coasters, displays, name plates, keyboards, cosmetics, accessories (watches) , lighters), stationery, building materials, radios, televisions, speakers, calculators, automobile meter panels, emblems, keys, clothing, footwear, devices, office automation equipment, etc.

In the present invention, when the transparent hologram is configured as a reflection hologram, due to the angular dependence of reproduction, which is a characteristic of holograms, outside the angular range where the hologram can be reproduced, it cannot be seen as a mere transparent body, and the angle at which the hologram can be reproduced is invisible. Within this range, the light reflectance is at its maximum, creating the effect of a reflective hologram.

Next, the present invention will be explained in more detail by giving specific examples.

Example 1 A hologram transfer foil was obtained by sequentially forming a protective layer, a hologram forming layer, a transparent continuous Vt thin film layer, and an adhesive layer on one side of a base film made of polyester and having a thickness of 25 μm. The composition of each layer is as follows. In addition, the hologram forming layer is
After forming the resin layer, it was constructed as a relief hologram.

Protective layer composition Cellulose acetate resin 5 parts by weight methanol
25 parts by weight methyl ethyl ketone
45 parts by weight Toluene 25 parts by weight Methylolated melamine resin 0.5 parts by weight Balatoluenesulfone Mo, osma part Hologram forming layer composition Acrylic resin 40 parts by weight Melamine resin 10 parts by weight Anone
50 parts by weight Methyl ethyl ketone 50 parts by weight Transparent continuous thin film layer composition nS Adhesive layer composition Vinyl chloride/vinyl acetate copolymer 20 parts by weight Acrylic resin 10 parts by weight Ethyl acetate
20 parts by weight toluene
The hologram transfer foil obtained as described above was superimposed on the printed part of a certificate of deposit, in which letters and pictures were printed on 50 parts by weight of high-quality paper using an offset printing method, so that the adhesive layer was in contact with the printed part. Thereafter, a hot plate was applied to the base film side of the transfer foil, and the foil was heated and pressurized at 170° C. and 50 kt/−, and then the base film was peeled off and the transparent hologram was transferred onto the certificate of deposit. When the obtained hologram-containing certificate of deposit was observed, letters, etc. could be seen from above the hologram, and a three-dimensional reconstructed image of the hologram was recognized when viewed from a different angle.

Example 2 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 1100 parts by weight α, α'-α
Next, 0.1 parts by weight of para-methoxyphenol was added to the obtained reaction product to stop the reaction, and 100 parts by weight of 2-hydroxyethyl acrylate and 2.4-toluene diisocyanate were added. A 1 mole to 1 mole adduct of 1 mole to 1 mole was added thereto, and 5 parts by weight of dibutyltin silaurylate were added thereto, and the mixture was reacted at 80° C. for 5 hours while blowing dry air.

After the reaction solution was cooled to room temperature, 15 parts by weight of an ultraviolet sensitizer (Irgacure 184 manufactured by Ciba Geigy) was added and uniformly dissolved to obtain an ultraviolet curable resin composition.

Next, 2 μm of the ultraviolet curable resin composition was applied to a polyethyl terephthalate film having a thickness of 200 μm as a base sheet to prepare a hologram-forming film. This hologram-forming film did not become sticky at room temperature and could be stored in a rolled state.

Next, the resin surface of the obtained film and the uneven surface of the mold on which the hologram is recorded in the uneven shape are superimposed 1
The mold and the film were brought into close contact by heating and pressing using nip rolls at 50° C. and a pressure of 20 kg/cd.

Next, with these in close contact, 80W/W from the film side.
The coated resin was cured by irradiating ultraviolet rays through a UV lamp having an output of 1 Oclm at a rate of 1 ion/min. Thereafter, the film was peeled off from the mold to obtain a relief hologram.

Next, as a transparent continuous thin film layer, TiO2 was heated and evaporated using an electron beam heating method, and a 200-layer thin film was vacuum-deposited on the relief forming surface.

Next, the release surface of the release paper coated with silicone resin on the base is coated with an acrylic acid ester adhesive to form a 20 μm film, while the transparent Vt thin film surface of the hologram forming film and the adhesive are coated. The adhesive surfaces were dry laminated to obtain a hologram seal.

This hologram sticker was punched out into a suitable shape to obtain a hologram label, the release paper of this label was peeled off, and the label was pasted onto a plastic card.

This plastic card is made of a vinyl chloride core consisting of a 100μm vinyl chloride film with a magnetic stripe transferred to it, a 560μm hard chloride and Nylcore film with letters and designs printed by offset printing, and another 100μm vinyl chloride film. They were laminated in a sandwich shape and heated and pressurized at 150° C. and 50 kg/−. The hologram label was attached to the corresponding position of the printed image.

When I observed the obtained card containing the hologram, I was able to see the letters etc. from above the hologram, and when I looked at it from different angles, the three-dimensional reconstructed image of the hologram was f!
It has been certified.

〔Effect of the invention〕

The transparent hologram according to the present invention is reproduced only within a specific reproduction angle range, and the hologram is not recognized at other normal angles and is simply seen as a transparent object.
This has the advantage that it does not obstruct visual viewing of the display portion such as characters located at the bottom, and the hologram reproduced within the reproduction angle range can exhibit a sufficient hologram effect. Further, in the vicinity of the angular range where the hologram can be reproduced, both the hologram and the display section can be seen by changing the viewing position slightly, thus demonstrating the dual nature of the design. As described above, the present invention has the advantage of having both a hologram effect and a display effect.

According to the present invention, the hologram does not obstruct visual viewing of the display section, so there are no restrictions on the position where the hologram is formed on the support, and the degree of freedom in design is increased. Even if a hologram is placed on the part, there is no problem in appearance, so when the present invention is applied to cards and cash vouchers, it can effectively prevent counterfeiting of cards and cash vouchers without reducing the product value. can be achieved.

As mentioned above, in the present invention, the hologram is visible only as a transparent body outside the reproducible angle range, so it is difficult to achieve high brightness as in the case where a conventional reflective hologram with a reflective metal thin film is provided on a support. There is no discomfort caused by the silvery white color, and the appearance is also excellent.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view showing an embodiment in which a hologram is provided by transfer, Fig. 3 is a sectional view taken along the mm-m stripe line in Fig. 2, and Fig. 4 5 is a perspective view showing an embodiment in which a hologram is attached by pasting. FIG. 6 is a sectional view taken along the line Vl-Vll in FIG. 5. FIG. 7 is a longitudinal sectional view of a hologram sticker. It is a diagram. 1... Support 2... Display section 3... Transparent hologram Figure 2 Figure 3 ■

Claims (1)

[Claims] a support; a transparent hologram provided on the support;
A transparent hologram forming body comprising a display section provided at least at a lower position of the transparent hologram.