JPH0487959A - package - Google Patents

Abstract

PURPOSE:To easily discriminate whether a packaged article is real or not and easily manufacturable by am method wherein one sheet material is made of a transparent resin sheet on the surface of which, an uneven pattern to correspond with a hologram interference pattern is formed, and the other sheet material is adhered on the surface for which the uneven pattern is formed. CONSTITUTION:A valuable article 1 is placed between an upper side sheet material 2 and a lower side sheet material 3, and sealed by adhering the outer peripheries of both sheet materials 2, 3 by an adherent layer 4. The lower side sheet material 3 is made of a transparent hologram sheet. The transparent hologram sheet 3 has a relief surface 5, and informing light to the relief surface 5 is fresnel-reflected by the difference in refractive index between the transparent material and air. Since this reflected light has a wave surface which is modulated by the relief surface, the image of a recorded article is reproduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a package, and in particular, it has excellent design effects and can be used to ensure that articles such as jewelry, coins, medals, banknotes, stamps, precious metals, etc. are genuine and are not counterfeit. Concerning proof packaging that can be shown to be non-intrusive.

[Conventional technology]

Conventionally, two sheets are prepared, a recess is formed on one or both sheets to match the outer shape of the article to be packaged, the article to be packaged is placed in the recess of one sheet, and the other is placed in the recess. It is a good idea to stack one sheet on top of the other sheet, and then glue the outer periphery of the sheet that spreads in a flat shape around the recess to the outer periphery of the other sheet using heat fusion, etc., to seal the article between the two sheets. Are known.

[Problem to be solved by the invention]

By the way, when packaging valuables such as jewelry, coins, medals, banknotes, stamps, precious metals, etc. using two sheets, the package sheet material itself is forged and the packaged valuables are not treated as such. It is also possible to insert counterfeit items and make it appear as if the contents and packaging are genuine.

Therefore, in order to prevent these, it is possible to use a sheet material that is difficult to counterfeit as the package material.
Previously, printed sheets were used that were difficult to counterfeit, but when printed on sheets, the contents were not visible, and
It is not very difficult to counterfeit and is not a sufficient solution.

Moreover, printing has a limit to the design effect of the package, and there are limits to how much it can attract the attention of consumers.

The present invention was made in view of this situation, and
The purpose of this is to make it easy to tell whether a packaged item is genuine or not by looking at the hard-to-counterfeit display that is integrated into the package, and to identify valuable items inside from the inside. can also be seen from the table, and
To provide a package which can give a special design effect and whose packaging material can be easily manufactured.

[Means to solve the problem]

The present invention has been made as a result of intensive research to achieve the above object.
It has been completed and uses a transparent hologram sheet as the sheet material that makes up the package.

That is, the package of the present invention is a package in which the article to be packaged is sandwiched between two transparent sheet materials, and the outer circumferences of both sheet materials surrounding the article are adhered to each other, thereby sealing the article between the two sheet materials. In this method, one sheet material is made of a transparent resin sheet on whose surface a concavo-convex pattern corresponding to the hologram interference pattern is formed, and one sheet material is adhered to the other sheet material on the surface on which the concavo-convex pattern is formed. It is characterized by being configured with the following features.

In this case, the transparent resin sheet may be provided on a transparent support sheet.

Alternatively, the surface on which the uneven pattern is formed may be partially bonded to the other sheet material.

Furthermore, the other sheet material may also be made of a transparent resin sheet on which a concavo-convex pattern corresponding to the hologram interference pattern is formed, and the surfaces of both sheet materials on which the concavo-convex pattern is formed may be bonded to each other. .

[Effect]

In the package of the present invention, one sheet material is composed of a transparent resin sheet on which a concavo-convex pattern corresponding to a hologram interference pattern is formed, and one sheet material is composed of a transparent resin sheet having a concavo-convex pattern formed on the surface thereof, and one sheet material is made of a transparent resin sheet with a concavo-convex pattern formed on the surface of the sheet material corresponding to the hologram interference pattern. Since the sealed surface is bonded, even if an item is sealed inside, its condition can be checked from the outside. Moreover, the hologram image reproduced from the transparent relief hologram surface of one sheet material can be reproduced by superimposing it on the surface or inside of the background article, and a special design effect can be obtained. Moreover, by selecting special images, reproduction methods, and reproduction light to be reproduced, it is possible to manufacture products that are easy to confirm as genuine and are difficult to counterfeit. Furthermore, the transparent resin sheet itself, which has a concavo-convex pattern formed on its surface that corresponds to the hologram interference pattern, can be manufactured easily and inexpensively by simply adding a simple process of duplicating a mold. The cost of the package itself does not increase. In addition, when it is necessary to align and bond both sheet materials, since both sheet materials are transparent, alignment can be easily performed while looking at the pattern provided on the other sheet and the reproduced image from the hologram. There are also benefits.

〔Example〕

Embodiments of the package of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross section of one embodiment of the packaging package according to the present invention, in which a valuable article 1 such as a medal is sandwiched between an upper sheet material 2 and a lower sheet material 3, and both sheets By gluing the material 2.3 with the adhesive layer 4 on the outer periphery,
It is sealed. In the upper sheet material 2, a recess 6 is formed to match the outer shape of the article 1 at a material stage before forming a package.

The present invention is particularly characterized by the structure of the lower sheet material 3, which is made of a transparent hologram sheet. The transparent hologram sheet 3 has a relief surface 5, and the relief surface 5 is used, for example, to simultaneously irradiate the photoresist with an object light having information about the object to be displayed and a reference light having the same wavelength as the object light to cause interference. The interference fringes are recorded as a concave-convex pattern, the concave-convex pattern (relief pattern) of this photoresist is transferred to a mold, and the relief pattern of the mold is replicated on the material constituting the transparent hologram sheet 3. . The light incident on this relief surface 5 is Fresnel-reflected due to the difference in refractive index between the transparent material and air, and this reflected light has a wavefront modulated by the relief surface, so that the recorded image of the object is reproduced. It is something that Moreover, since both the upper sheet material 2 and the lower sheet material are transparent, in addition to such a hologram reproduction image, the object (article 1) on the other side of the transparent hologram sheet 3 can be seen through. Therefore, the reproduced image of the article 1 and this hologram appear to overlap spatially.

In the above, the constituent materials and film thicknesses of the respective constituent materials are shown as an example, although the present invention is not limited thereto. The upper sheet material 2 is made of polyvinyl chloride or PET (polyethylene terephthalate) with a film thickness of 200 to 300 μm. Use highly transparent materials such as As the transparent hologram sheet 3, polyvinyl chloride with a film thickness of 50 to 200 μm is used, the unevenness of the relief is about 0.2 μm, and the pitch of the relief pattern is about 0.5 to 2 μm. Transparent adhesive layer 4
As, ionomer (metal salt of ethylene methacrylic acid copolymer, Surlyn (trade name) manufactured by DuPont), ethylene vinyl acetate copolymer (EVA), ethylene acrylic acid copolymer (EAA), polyvinyl chloride (P
VC), polyester, vinyl chloride/vinyl acetate copolymer, and other materials that have good low-temperature sealing properties and high film strength are used.

In the present invention, the material of the transparent relief hologram sheet 3 may be polyvinyl chloride, acrylic (for example, MM
A) Thermoplastic resins such as polystyrene and polycarbonate, unsaturated polyester, melamine, epoxy, polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate polyether (meth)acrylate, polyol (meth)acrylate, A cured thermosetting resin such as melamine (meth)acrylate or triazine acrylate, or a mixture of the above-mentioned thermoplastic resin and thermosetting resin can be used.

Furthermore, as the material of the transparent hologram sheet 3 of the present invention,
Two types of thermoformable materials having radically polymerizable unsaturated groups can be used:

(1) A polymer having a glass transition point of 0 to 250°C and having a radically polymerizable unsaturated group. More specifically,
As the polymer, a radically polymerizable unsaturated group can be introduced into the following four polymerized or copolymerized compounds by methods (a) to (d) described below.

■ Monomers having hydroxyl groups; N-methylol acrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2
-Hydroxybutyl acrylate 2-hydroxybutyl methacrylate 1.2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroxy-3-phenoxypropyl acrylate, etc.

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

■ Monomer nigericidyl methacrylate, etc. having an epoxy group.

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

■ Monomers having amino groups such as niacrylamide, methacrylamide, diaseptone acrylamide, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, etc.

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

(2) Monomer having an isocyanate group: an adduct of a diisocyanate and a radically polymerizable 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, t-butyl methacrylate, isoamyl acrylate, inamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate,
Examples include 2-ethylhexyl acrylate and 2-ethylhexyl methacrylate.

Next, the material according to the present invention 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. can.

(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. Specific examples include stearyl acrylate, stearyl methacrylate, triacrylisocyanurate, cyclohexanediol diacrylate, cyclohexanediol dimethacrylate, spiroglycol diacrylate, and spiroglycol dimethacrylate.

Moreover, in the present invention, the above (1) 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 diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, pentaerythritol tetraacrylate, penta Erythritol tetramethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, ethylene glycol diglycidyl ether diacrylate, ethylene glycol diglycidyl ether dimethacrylate,
Polyethylene glycol diglycidyl 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 0.1 to 10 parts by weight of the solid content of the copolymer mixture described above can be used.
It is preferable to use 0 parts by weight. In addition, the above materials can be sufficiently cured by electron beams, but when curing by ultraviolet irradiation, benzoquinone, benzoin, benzoin ethers such as 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 sheet 3 can be obtained by a conventionally known method. For example, a hologram master plate on which interference fringes are recorded in the form of unevenness is used as a press mold, a hologram-forming resin sheet is placed on the hologram master plate, and the two are heated and pressure-bonded by means such as a heating roll, and the hologram-forming resin sheet is A hologram sheet can be obtained by a method of duplicating the uneven pattern of a hologram original on its surface. Note that the hologram sheet 3 may be composed of a single sheet of the above-mentioned material, but it is also possible to coat the above-mentioned material on a support sheet made of a transparent material such as PET, and replicate the relief surface on the surface. You may also do so.

Further, the hologram sheet 3 can record hologram information due to the unevenness of its surface, and specific holograms include those based on the principle of Fresnel hologram, Fourier transform hologram, Fraunhofer hologram, etc., excluding Lippmann hologram, and Image holograms, rainbow holograms, holographic stereograms, holographic diffraction gratings, etc. that utilize this principle are used.

The article 1 is sandwiched between such a lower sheet material 3 and an upper sheet material 2 in which a recess 6 is formed to match the outer shape of the article 1, and the two are overlapped, and the adhesive layer 4 is used to bond the two together at the outer periphery of the recess 6. Glue. Various known adhesives can be used as the adhesive for the adhesive layer 4. For example, a vinyl chloride-vinyl acetate copolymer is applied in advance to the outer periphery of the upper surface of the lower sheet 3 and the outer periphery of the lower surface of the upper sheet material 2, and a heating head (not shown) is pressed onto the outer periphery of both sheet materials 2.3. It can be heated and melted and bonded. In addition, as another example, a sheet of low melting point polyester is sandwiched between the overlapped portion of the upper sheet material 2 and the lower sheet material 3, and a heating head is similarly pressed against the sheet material 2.3 to heat both sheet materials 2.3. By melt-bonding, article 1
The package is completed by sealing the inside. When using a urethane-based dry laminating adhesive as the adhesive for the adhesive layer 4 on the lower surface of the upper sheet material 2, apply urethane adhesive to the outer periphery of the upper surface of the lower sheet material 3 and the outer periphery of the lower surface of the upper sheet material 2 in advance. After applying the adhesive and drying it, both sheet materials 2.3 are stacked so that the adhesives are in contact with each other, and an adhesive layer 4 is formed by both adhesive layers to bond both sheet materials 2.3. Furthermore, if both sheet materials 2.3 are made of a heat-melting material such as polyvinyl chloride, they may be directly heat-sealed and bonded together without using a special adhesive.

In the package configured as described above, both the upper sheet material 2 and the lower sheet material 3 are transparent, so even if the article 1 is sealed therein, its condition can be confirmed from the outside. Therefore, the color, shape, pattern, flaws, etc. of the article 1 inside can be clearly seen. Moreover, since the lower sheet material 3 is provided with a transparent hologram relief surface 5, the reproduced hologram image can be reproduced by superimposing it on the surface or inside of the background article 1, thereby obtaining a special design effect. be able to.

In addition, by selecting a special image, reproduction method, and reproduction light to be reproduced, it is easy to confirm the true world.
You can make things that are difficult to counterfeit.

Note that the bonding areas of the adhesive layer 4 between the two sheet materials 2.3 may be provided at intervals in a micro pattern. When bonding is performed on the entire surface, there is almost no difference in refractive index on the relief surface 5, so Fresnel reflection does not occur.
Although a reconstructed hologram image cannot be obtained at the bonded portion, if the bonding is performed in discrete areas in this way, Fresnel reflection will occur from the non-bonded areas between the bonded areas, and a reconstructed hologram image will be obtained. Moreover, if such scattered adhesive layer 4 is peeled off and the article 1 sealed inside is modified or replaced with a fake one and then re-adhered,
Discrete non-adhesive areas may be destroyed, making it impossible to obtain a hologram reconstruction image, or changing the shape of the hologram reconstruction image, which can be easily seen and confirmed, making it easy to determine whether this package has already been opened or not. There are effects that can be confirmed.

In the above, it is desirable that both sheet materials 2.3 are made of the same material. This is because if the upper sheet material 2 and the lower sheet material 3 are made of different materials, the bonded portion 4 will curve after bonding due to the difference in thermal expansion coefficient between the two.

Note that similar effects can be achieved even if a transparent relief hologram sheet is used as the upper sheet material 2 in the same manner as the lower sheet material 3.

Although various modifications have been described above, the invention is not limited to these, and various other modifications are possible. Furthermore, various known materials can be selected and used for each layer and adhesive material.

〔Effect of the invention〕

In the package of the present invention, one sheet material is composed of a transparent resin sheet on which a concavo-convex pattern corresponding to a hologram interference pattern is formed, and one sheet material is composed of a transparent resin sheet having a concavo-convex pattern formed on the surface thereof, and one sheet material is made of a transparent resin sheet with a concavo-convex pattern formed on the surface of the sheet material corresponding to the hologram interference pattern. Since the sealed surface is bonded, even if an item is sealed inside, its condition can be checked from the outside. Moreover, the hologram image reproduced from the transparent relief hologram surface of one sheet material can be reproduced by superimposing it on the surface or inside of the background article, and a special design effect can be obtained. Moreover, by selecting special images, reproduction methods, and reproduction light to be reproduced, it is possible to manufacture products that are easy to confirm as genuine and are difficult to counterfeit. Furthermore, the transparent resin sheet itself, which has a concavo-convex pattern formed on its surface that corresponds to the hologram interference pattern, can be manufactured easily and inexpensively by simply adding a simple process of duplicating a mold. The cost of the package itself does not increase. In addition, when it is necessary to align and bond both sheet materials, since both sheet materials are transparent, alignment can be easily performed while looking at the pattern provided on the other sheet and the reproduced image from the hologram. There are also benefits.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of a package according to the invention. DESCRIPTION OF SYMBOLS 1... Article, 2... Upper sheet material, 3... Lower sheet material, 4... Adhesive layer, 5... Relief surface, 6...
・Applicant for recesses Dai Nippon Printing Co., Ltd.

Claims (4)

[Claims] (1) In a package in which the article is sealed between two transparent sheet materials by sandwiching the article between the two sheets and adhering the outer peripheries of both sheet materials surrounding the article to each other, one sheet The material is made of a transparent resin sheet on whose surface a concavo-convex pattern corresponding to the hologram interference pattern is formed, and one sheet material is bonded to the other sheet material on the surface on which the concavo-convex pattern is formed. Featured package. (2) The package according to claim 1, wherein the transparent resin sheet is provided on a transparent support sheet. (3) The package according to claim 1 or 2, wherein the other sheet material and the surface on which the uneven pattern is formed are partially bonded. (4) The other sheet material is also composed of a transparent resin sheet with a concavo-convex pattern formed on its surface corresponding to the hologram interference pattern, and the surfaces of both sheet materials on which the concavo-convex pattern is formed are bonded to each other. Claims 1 to 3 characterized by
A package described in any one of the above.