JPH0487960A - Sealed package - Google Patents

Abstract

PURPOSE:To easily discriminate whether a packaged article is real or not, and make a display element be destroyed when a sheet body is attempted to be separated by a method wherein one sheet material is constituted of a transparent basic layer and a transparent relief hologram sheet which is adhered by the hologram relief surface on the outer side surface of the basic layer, and the other sheet material is adhered on the inner side surface of the basic layer. CONSTITUTION:A lower side sheet material 3 consists of a transparent basic layer 5 which keeps mechanical strength and ensures the thickness, and a transparent hologram multi-layer body 6 which is adhered on the outer side surface of the basic layer 5 through a first transparent adherent layer 7. On the opposite surface of the basic layer 5 from the surface on which the transparent hologram multi-layer body 6 is adhered, a heat-sensitive adherent layer 8, which is drapeable to a heat-sensitive adherent layer 13 provided on the lower side surface of an upper side sheet material 2 to be adhered, and is made of the same material with the heat-sensitive adherent layer 13, is adhered through a second transparent adherent 9. The transparent hologram multi-layer body 6 consists of a transparent relief hologram layer 11 provided on a hologram layer supporting layer 10, and a transparent reflective layer 12 provided on the relief surface of the hologram layer 11.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hermetic package, and in particular, the present invention relates to a sealing package, and in particular, the present invention relates to a sealing package, and in particular, to ensure that valuable articles such as jewelry, coins, medals, banknotes, stamps, etc. are authentic and
The present invention relates to a proof package that indicates that it is not a counterfeit product and that there is no possibility that the package has been opened and the product inside has been altered or replaced with a counterfeit product.

[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, etc. using such two-sheet packaging, the resulting package does not allow the adhesive between the two sheets to be peeled off. This allows the items stored inside to be altered or exchanged for counterfeit items. It is also possible to forge the sheet material of the package itself and place a counterfeit item in the package as a valuable item, making it appear as if both the wrapped contents and the package are genuine.

Therefore, in order to prevent these, the package material should be made of a sheet material that is difficult to counterfeit, and if the package is constructed by gluing two sheets together, it is necessary to peel them off and alter the contents. One idea would be to make it easy to tell when the item has been exchanged, but in the past, printed sheets were used that were difficult to counterfeit. It's not difficult, but it's not a sufficient solution. In addition, a satisfactory package structure capable of detecting peeling and opening has not been obtained.

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 check the valuables inside from both the front and back. To provide a sealing pancase that has a special design effect, and has a structure in which the display body is destroyed when two sheet bodies constituting the package are peeled off. It is.

[Means to solve the problem]

The present invention has been made as a result of intensive research to achieve the above object.
This is a completed product, and when a transparent hologram layer is integrated into the sheet material that makes up the package, and an attempt is made to separate the adhesive between the two sheet materials,
The structure is such that this hologram layer is destroyed.

That is, the hermetically sealed package of the present invention is capable of sealing the article between the two sheets by sandwiching the article to be packaged between the two sheet materials and adhering the outer peripheries of both sheet materials surrounding the article to each other. In a package for use in a computer, one sheet material is composed of a transparent substrate layer and a transparent relief hologram sheet adhered to the outer surface of the transparent substrate layer at the hologram relief surface, and one sheet material is composed of the other sheet material and the inner side of the substrate layer. It is characterized in that it is constructed by adhering on the surface.

In this case, the substrate layer and the hologram relief surface may be partially bonded.

Further, it is desirable that the adhesive force between the substrate layer and the hologram relief surface be smaller than the adhesive force between the inner surface of the substrate layer of one sheet material and the other sheet material.

The transparent relief hologram sheet has an uneven pattern corresponding to a hologram interference pattern formed on the surface of the transparent layer,
Preferably, a transparent thin film having a refractive index different from that of the transparent layer is provided thereon to form a hologram relief surface.

By the way, in the transparent relief hologram sheet, the transparent layer can also be provided on the surface of a transparent support layer.

In the transparent relief hologram sheet as described above,
It is desirable that the adhesive force between the transparent thin film provided on the uneven pattern of the transparent layer and the transparent layer be approximately equal to the adhesive force between the substrate layer and the hologram relief surface.

In this case, it is one embodiment that the adhesive strength between the transparent thin film provided on the uneven pattern of the transparent layer and the transparent layer is partially different.

Furthermore, a release layer may be partially provided between the transparent layer and the transparent support layer.

By the way, a hologram relief surface may be provided on the entire surface of the transparent relief hologram sheet. A hologram relief surface may be provided only on the relief hologram sheet.

In addition, in the area where both sheet materials are bonded to each other on the outer periphery, a cut is provided that surrounds the sealed article and reaches from the other sheet material to the vicinity of the adhesive layer between the substrate layer and the transparent relief hologram sheet. is also one embodiment.

Further, a heat-sensitive adhesive layer is provided on the inner surface of the substrate layer, and a heat-sensitive adhesive layer is also provided on the surface of the other sheet material to be bonded, so that both the sheet materials are bonded by the both heat-sensitive adhesive layers. You can also do it.

In this case, it is desirable that the adhesive force between the inner surface of the substrate layer and the heat-sensitive adhesive layer provided on that surface be greater than the adhesive force between the substrate layer and the hologram relief surface.

Furthermore, in one embodiment, it is desirable that the other sheet material, the substrate layer, and the transparent support layer are all made of polyester.

In that case, it is desirable that at least the other sheet material is made of amorphous polyester.

Further, the other sheet material has the same structure as the one sheet material, and by adhering the substrate layers of both sheet materials to each other, it is also possible to seal the article between the two sheet materials.

Furthermore, it is preferable that one of the sheet materials is formed into a shape that corresponds to the shape of the article to be packaged.

[Effect]

In the sealed package of the present invention, one sheet material is composed of a transparent substrate layer and a transparent relief hologram sheet adhered to the outer surface of the transparent substrate layer at the hologram relief surface, and one sheet material is made of Since the substrate layer is bonded to the inside surface, by making the other sheet material transparent, even if an article is sealed therein, the state of the article can be checked from the outside. Moreover, the hologram image reproduced from the transparent relief hologram sheet of one sheet material can be reproduced by being superimposed 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. Even if an attempt is made to tamper with the sealed item or replace it with a counterfeit one by peeling off the adhesive between the two sheet materials and opening the package, the adhesive force will be properly distributed between the adhesive layers. By doing this, peeling does not occur at the adhesive part between both sheet materials, but at the hologram relief surface, and by causing destruction of the hologram relief surface when this portion is peeled off, It becomes impossible to repair the opening. Since the destruction of the hologram relief surface can be easily seen and confirmed, it can be easily confirmed whether the package has been opened or not. 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〕

Hereinafter, some embodiments of the sealing package of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of one embodiment of the sealing 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 at the adhesive part 4 on the outer periphery,
It is sealed. The upper sheet material 2 is formed with a recess 14 according to the outer shape of the article 1 at the material stage before configuring the package.
is molded.

The present invention is particularly characterized by the structure of the lower sheet material 3, which mainly consists of a transparent substrate layer 5 that maintains the mechanical strength of the lower sheet material 3 and ensures its thickness; A transparent hologram multilayer body 6 is bonded to the transparent hologram multilayer body 6 via a first transparent adhesive layer 7. On the surface of the substrate layer 5 opposite to the surface to which the transparent hologram multilayer body 6 is adhered, there is a heat-sensitive layer made of a material similar to that of the heat-sensitive adhesive layer 13 provided on the lower surface of the upper sheet material 2. The adhesive layer 8 is the second
They are bonded together via a transparent adhesive layer 9. The transparent hologram multilayer body 6 includes a transparent relief hologram layer 11 provided on a hologram layer support layer 10 and a transparent reflective layer 12 provided on the relief surface of the hologram layer 11.

The relief surface of the hologram layer 11 is formed by, for example, simultaneously irradiating a 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, and recording the interference fringes as an uneven pattern. The uneven 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 hologram layer 11. On this relief surface, a hologram layer 11
When the transparent layer 12 is provided with a refractive index larger than the refractive index of the material (the refractive index may be relatively small), the incident light is Fresnel-reflected at the interface due to the refractive index difference, and this reflected light is Since it has a wavefront modulated by the relief surface, the recorded image of the object can be reproduced.

Moreover, since the hologram layer support layer 10, the relief hologram layer 11, and the reflective layer 12 are all transparent, in addition to such a hologram reproduction image, the transparent hologram multilayer body 6
The object (item 1) on the other side can be seen through it. Therefore, the reproduced image of the article 1 and this hologram appear to overlap spatially.

In the above, the constituent materials and film thicknesses are shown as an example, although the present invention is not limited to. As the upper sheet material 2, vinyl chloride with a film thickness of 2 (16) to 3 (16) μm is used. or PET (polyethylene terephthalate)
is used, and the lower surface thereof is coated with heat-sensitive adhesive N13. The substrate layer 5 is made of PET with a thickness of 1 (16) to 2 (16) μm, and the first transparent adhesive layer 7 and the second transparent adhesive layer 9 are made of urethane-based dry lamination adhesive. In addition, as the heat-sensitive adhesive layers 8 and 13, ionomer (metal salt of ethylene methacrylic acid copolymer, Surlyn (trade name) manufactured by DuPont ■), ethylene vinyl acetate copolymer (EVA), ethylene acrylic acid copolymer (EAA), etc. ) and other materials with good low-temperature sealing properties and high film strength. The thickness of the heat-sensitive adhesive layer 8.13 is approximately 20 to 50 μm. Hologram layer support layer 1
For example, PET with a thickness of 10 to 1 (16) μm is used as the transparent relief hologram layer 11.
We use ultraviolet curing acrylic with a diameter of 0.2 μm, and the unevenness of the relief is approximately 0.2 μm, and the pitch of the relief pattern is 0.5 μm.
It is about 2 μm. The transparent reflective layer 12 is made of vacuum-deposited zinc sulfide (about 1(16) to 1(16) OOA).
ZnS).

Note that in the present invention, the transparent relief hologram layer 11
Materials include polyvinyl chloride, acrylic (e.g. MMA
), 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.

Further, as the material for the hologram layer 11 of the present invention, thermoformable substances having radically polymerizable unsaturated groups can be used, and these include the following two types: (1) A glass transition point of 0 to 250 ℃ having radically polymerizable unsaturated groups in the polymer. More specifically, as a polymer, it is possible to use a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (2) and introducing a radically polymerizable unsaturated group by methods (a) to (d) described below. can.

■ Monomers having hydroxyl groups 2N-methylolacrylamide, 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.

■ Monomers having epoxy groups; glycidyl methacrylate, etc.

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

(2) Monomers having amino groups such as niacrylamide, methacrylamide, diacetone acrylamide, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, etc.

■ Monomer with 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, and t-butyl acrylate. -Butyl methacrylate, isoamyl acrylate, isoamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, 2
-Ethylhexyl acrylate, 2-ethylhexyl methacrylate, and the like.

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 dimethacrylate, 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 dimethacrylate Acrylate, 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 tetra Glycidyl ether tetramethacrylate etc. can be used, and 0.1 parts by weight of the solid content of the copolymer mixture described above can be used.
It is preferable to use it in an amount of 1 (16) 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.

Hologram layer 11 can be obtained by conventionally known methods. For example, a hologram master plate on which uneven fringes are recorded is used as a press mold, a hologram-forming resin sheet is placed on the hologram master plate, and the two are heated and pressed together using a heating roll or other means, and the hologram-forming resin is The hologram layer 11 can be obtained by a method of replicating the uneven pattern of the hologram original on the sheet surface.

In addition, the hologram layer 11 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. Image holograms, rainbow holograms, holographic stereograms, holographic diffraction gratings, etc. that utilize this principle are used.

The transparent reflective layer 12 has a refractive index of the hologram layer 11 (usually
refractive index: n = 1.3 to 1.6), can be formed in the same position as a conventional reflective metal thin film, and as a material for such a thin film 4. Below, the refractive index: n is added in parentheses to the right of the material salt), 5b2S3 (n = 3.0), FeJ3 (n
= 2.7), Ti02 (n = 2.6), Cd5 (n =
2.6), Ce09 (n = 2.3), 2nS (n = 2
．． 3), PbC12 (n = 2.3>, Cd0 (n =
2.2), 5bJ3 (n = 2.0), 11103 (
n = 2.0>, Si [l (n = 2.0), Bi20
3 (n = 2.5), In203 (n = 2.0), Pb
0 (n = 2.6), Ta205 (n = 2.4)
, 2nO (n = 2.1), 2rD□ (n = 2.0)
, Cd203 (n = 1.8), At203 (n = 1
．． 6), CaO.5i02 (n=1.8), and the like.

The reflective layer 12 preferably has a refractive index greater than the refractive index of the hologram layer 2 by 0.3 or more, more preferably by 0.5 or more. According to experiments conducted by the inventors, 1. The result has been that it is optimal for the value to be larger than 0.

The thickness of the reflective layer 12 may be in the transparent region of the material forming the thin film, but is usually 1(16) to 1(16)(16).
) people are preferred. As a method for forming the reflective layer 12 on the relief forming surface 3 of the hologram layer 11, a vacuum evaporation method,
General thin film forming methods such as sputtering method, reactive sputtering method, and ion plate ink method can be employed.

When the reflective layer 12 with a large refractive index is provided in this way, due to the angular dependence of reproduction, which is a characteristic of holograms, outside the angular range in which the hologram can be reproduced, it appears only as a transparent body, and the angular range in which the hologram can be reproduced. Inside, the light reflectance is at its maximum, creating the effect of a reflective hologram.

By the way, the method for manufacturing the lower sheet material 3 having the above structure is to first manufacture the transparent hologram multilayer body 6, and then sequentially stack and adhere the substrate layer 5 and the heat-sensitive adhesive layer 8 thereon. Alternatively, there is a method in which the substrate layer 5 and the heat-sensitive adhesive layer 8 are first bonded together, a transparent hologram multilayer body 6 is separately produced, and the transparent hologram multilayer body 6 is laminated on the substrate layer 5 and bonded. In the former case, the hologram layer support layer 10 is first prepared, the above-described material for forming the hologram layer 11 is coated on it to a desired thickness, and a mold having a relief hologram pattern is formed on this coated film. For example, it is pressed and duplicated to form the hologram layer 11. The relief surface of the hologram layer IX is chemically
A corona discharge is applied to the relief surface in order to physically activate it and improve the affinity of the transparent reflective layer 12 to the hologram layer 11, thereby improving its adhesion. The degree of this discharge will be described later. Next, a transparent reflective layer 12 is formed on the activated relief surface by vacuum evaporation or the like. After that, a urethane adhesive is applied on the transparent reflective layer 12 and dried, and the substrate layer 5 is stacked on the transparent reflective layer 12, and the adhesive layer forms the first transparent adhesive layer 7 to form a transparent reflective layer. A substrate layer 5 is glued onto layer 12. The adhesive strength of this transparent adhesive layer 7 is
Adjustments will be made as described below. Next, urethane adhesive is similarly applied to the opposite side of the substrate layer 5 and dried, and the heat-sensitive adhesive layer 8 is overlaid on the substrate layer 5 so that the adhesive is in contact with the second side. A transparent adhesive layer 9 is formed and a heat-sensitive adhesive layer 8 is adhered onto the substrate layer 5. The adhesive force of this second transparent adhesive layer 9 is also adjusted as described later. As above,
The lower sheet material 3 is completed.

Further, the upper sheet material 2 has the heat-sensitive adhesive layer 13 coated on its lower surface as described above, and has a recess 14 formed in advance to match the outer shape of the article 1 to be packaged.

By overlapping such an upper sheet material 2 and a lower sheet material 3 with the article 1 in between, and pressing a heating head (not shown) against the outer periphery of both sheet materials 2.3, the adhesive portion 4 is formed. The heat-sensitive adhesive layer 13 of the upper sheet material 2 and the heat-sensitive adhesive layer 8 of the lower sheet material 3 are thermally fused, and both sheet materials 2.3
are glued together and the article 1 is sealed inside to complete the package.

In the package configured in this way, the adhesive strength between the hologram layer 11 and the transparent reflective layer 12 is A1, and the adhesive strength between the transparent reflective layer 12 and the substrate layer 5 (the adhesive strength of the first adhesive layer 7) is A2, the adhesive strength between the substrate layer 5 and the thermosensitive adhesive layer 8 (the adhesive strength of the second adhesive layer 9), A3, the adhesive strength of the adhesive part 4 of both sheets (between the thermosensitive adhesive layer 13 and the thermosensitive adhesive layer 8) (adhesion strength) is A4, at least ALL-
, A2<A3. Satisfies A4, preferably A1! ==A2<A3. It is constructed to satisfy A4.

A method for satisfying the above relationship will be explained.

As described above, the relief surface of the hologram layer 11 is chemically and physically activated to improve the adhesive strength of the transparent reflective layer 12 to the hologram layer 11.
Perform corona discharge. If this discharge is not performed, the adhesive strength between the two will be extremely weak and cannot be put to practical use. The higher the degree of this treatment, the stronger the adhesive strength becomes. Therefore, in order to adjust 1 to the above, it is sufficient to adjust this corona discharge time. In addition, the first adhesive layer 7 and the second adhesive layer 9 are dry laminated using a urethane adhesive, but in the case of a urethane adhesive, there are several ways to change the adhesive strength. There is. The first is to change its glass transition point (Tg). Increasing the Tg makes it brittle and lowers the adhesive strength, while lowering the Tg makes it softer and increases the adhesive strength. The urethane adhesive is made of polyol and isocyanate, and by selecting each type, the glass transition point (Tg) can be changed.
It is possible to satisfy A1ζA2<A3 or A1'=, A2<A3. The second method is to change the proportion of polyol and isocyanate. Usually, the ratio is 1:1-3, but if the ratio is 1=5 or more, the adhesive becomes hard and the adhesive strength decreases. A third method is to add epoxy-based materials to the polyol and isocyanate to harden and reduce adhesive strength. As described above, when an ionomer or the like is used for the heat-sensitive adhesive layers 8 and 13, an adhesion with good low-temperature sealing properties and high film strength can be obtained. Therefore, the above relationship A2<A4 can be easily obtained. As a specific example, A4 is 3kg/l
5mm, A3 is 1-2kg/15mm, A1
, A2 is about 2 (16) to 3 (16) g/15 mm, but it is easy to change to other strengths.

In a package configured as described above and in which the relationship of adhesive strength of each adhesive layer is as described above, both the upper sheet material 2 and the lower sheet material 3 are transparent, so that an article 1 can be placed inside the package.
Even if it is sealed, its condition can be checked from the outside. Therefore, the color, shape, pattern, flaws, etc. of the article 1 inside can be clearly seen. Moreover, since the transparent hologram multilayer body 6 is integrally incorporated into the lower sheet material 3, the reproduced hologram image can be reproduced by superimposing it on the surface or inside of the background article 1, creating 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.

If an attempt is made to alter the sealed article 1 or replace it with a counterfeit one, the adhesive portion 4 of both sheet materials 2.
When trying to open the package by peeling off the adhesive layer, the above-mentioned Al';A2<A3. Because of the relationship A4, peeling does not occur at the adhesive part 4 and the hologram layer 11
This occurs between the transparent reflective layer 12 and the transparent reflective layer 12 and the substrate layer 5. And the adhesion force AI between these,!
Since =A2 is approximately equal, the intermediate transparent reflective layer 12 is finely divided into the hologram layer 11 side and the substrate layer 5 side due to spatial variations in adhesive strength. Therefore, the transparent reflective layer 12 is destroyed and becomes irreparable. Hologram effect (
Since the destruction of the transparent reflective layer 12 (having an image reproduction function) can be easily confirmed, it can be easily confirmed whether or not this package has already been opened. Note that when the upper sheet material 2 and the lower sheet material 3 must be aligned and bonded, since both sheet materials 2.3 are transparent, the pattern provided on the other sheet and the hologram layer 11 will not be visible. Another advantage is that positioning can be easily performed while viewing the reproduced image.

Now, some modifications will be explained. As mentioned above, when attempting to peel off both sheet materials 2.3, the transparent reflective layer 12 must be destroyed.

In the case of the above example, the transparent reflective layer 12 is finely cracked and divided into the hologram layer 11 side and the substrate layer 5 side due to the naturally occurring spatial variations in adhesive strength. During the corona discharge treatment of the relief surface of No. 11, for example, a mask may be inserted onto the relief surface so that uneven corona discharge occurs. Further, the adhesive areas of the first adhesive layer 7 may be provided in discrete micro patterns. Furthermore, it is also effective to use a brittle hologram as the transparent hologram multilayer body 6. As shown in FIG.
0 and before applying the material for forming the hologram layer 11, a transparent mold release layer 15 with a desired fine pattern is applied to the coating surface.
is applied, and the hologram layer 11 is applied with the layer 15 in between.
It is constructed by coating adhesive layer 7 to transparent reflective layer 1.
When a force is applied to separate the hologram layer 11 and the reflective layer 12 from the hologram layer support layer 10, the hologram layer 11 and the reflective layer 12 at the position where the release layer 15 is present are reliably separated from the hologram layer support layer 10. If the adhesive strength is selected so that the remaining portions of the hologram layer 11 and reflective layer 12 remain on the support layer 10, the hologram layer 11 itself will be destroyed, so the objective can be achieved. .

By the way, in FIG. 1, the relief surface of the hologram layer 11 and the transparent reflective layer 12 thereon do not necessarily need to be provided on the entire surface of the lower sheet material 3.

As shown in FIG. 3, a relief surface and a transparent reflective layer 1 are provided only in the area S below the recess 14 that accommodates the article 1 other than the adhesive part 4.
2, and the surface of the hologram layer 11 that does not have a relief surface and the substrate layer 5 may be bonded to each other by the first transparent adhesive layer 7 in the lower part of the adhesive part 4. 11 may be omitted, and the substrate layer 5 and the support layer 10 may be directly bonded to each other by the transparent adhesive layer 7.

In these cases, the adhesive force AO between the transparent adhesive layer 7 and the hologram layer 11 or the support layer 10 is AO as described above.
<A3. A4 to AO<A3. Efforts must be made to satisfy the A4 relationship. In addition to selecting a combination of materials, one method is to provide the transparent reflective layer 12 also in these areas.

In addition, when attempting to peel off the sheet materials 2.3, in order to ensure that separation occurs at the transparent reflective layer 12 or hologram layer 11 and the hologram is destroyed, as shown in FIG. It is effective to provide the adhesive portion 4 around the recess 14 with a cut 16 that reaches at least the vicinity of the first adhesive layer 12 . In this way, sheets 2 and 3
In order to peel off the transparent reflective layer 12 , one has to try to fold down the outer part 17 of the cut 16 .
Otherwise, a portion of the hologram layer 11 may peel off.
The above objective can be achieved reliably.

By the way, in the case of FIG. 1, a heat-sensitive adhesive layer 8 is provided on the upper side of the substrate layer 5 of the lower sheet 3 in order to improve the adhesion with the upper sheet material 2 and facilitate adhesion. 1. It is not necessarily necessary, but may be omitted as long as the adhesiveness between the upper sheet material 2 and the substrate layer 5 can be ensured. Similarly, the hologram layer support layer 10 is not necessarily required.

This can be omitted if the hologram layer 11 is sufficiently thick. In addition,
The adhesive portion 4 may be bonded over the entire surface of this portion, or may be bonded only on discrete island-like portions.

In the above, as the material for the upper sheet material 2, it is preferable to use PET rather than vinyl chloride. This is because the substrate layer 5 that constitutes the mechanical support portion of the lower sheet material 3 is made of PET. In such a case, if a material different from the material constituting the lower sheet material 3 is used as the upper sheet material 2, the bonded portion 4 will curve after bonding due to the difference in coefficient of thermal expansion between the two. However, when polyester such as PET film is used as the upper sheet material 2, since the PET film is usually formed by biaxial stretching, the recesses 14 are formed in the PET film.
When molding, wrinkle-like unevenness occurs on the surface and the inside article 1
becomes difficult to see. In order to avoid such drawbacks, it is preferable to use an amorphous polyester film such as amorphous PET as the material for the upper sheet material 2. Even when the amorphous PET film is formed with the recesses 14, wrinkle-like irregularities do not occur on the surface, and the article 1 therein does not become difficult to see.

Note that the same effect as described above can be achieved even if a sheet body in which the transparent hologram multilayer body 6 is provided on the outer surface is used as the upper sheet material 2, similarly to 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 sealed package of the present invention, one sheet material is composed of a transparent substrate layer and a transparent relief hologram sheet adhered to the outer surface of the transparent substrate layer at the hologram relief surface, and one sheet material is made of Since the substrate layer is bonded to the inside surface, by making the other sheet material transparent, even if an article is sealed therein, the state of the article can be checked from the outside. Moreover, the hologram image reproduced from the transparent relief hologram sheet of one sheet material can be reproduced by being superimposed 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. Even if an attempt is made to tamper with the sealed item or replace it with a counterfeit one by peeling off the adhesive between the two sheet materials and opening the package, the adhesive force will be properly distributed between the adhesive layers. By doing this, peeling does not occur at the adhesive part between both sheet materials, but at the hologram relief surface, and by causing destruction of the hologram relief surface when this portion is peeled off, It becomes impossible to repair the opening. Since the destruction of the hologram relief surface can be easily seen and confirmed, it can be easily confirmed whether the package has been opened or not. 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 drawings]

FIG. 1 is a sectional view of one embodiment of a sealed package according to the present invention, FIG. 2 is a sectional view showing the structure of a brittle hologram, and FIGS. 3 and 4 are sectional views of another embodiment. DESCRIPTION OF SYMBOLS 1... Article, 2... Upper sheet material... Lower sheet material, 4... Adhesive part, 5... Substrate layer, 6... Transparent hologram multilayer body, 7... First transparent adhesive layer, 8...
Heat-sensitive adhesive layer, 9... Second transparent adhesive layer, 10... Hologram layer support layer, 11... Transparent relief hologram layer, 12... Transparent reflective layer, 13... Heat-sensitive adhesive layer, 1
4... Concavity, 15... Transparent release layer, 16... Notch, 17... Portion outside the notch Applicant Dai Nippon Printing Co., Ltd.

Claims (17)

[Claims] (1) In a sealed package in which the article is sealed between two sheet materials by sandwiching the article between the sheets and adhering the outer peripheries of both sheet materials surrounding the article, one The sheet material is composed of a transparent substrate layer and a transparent relief hologram sheet adhered to the outer surface of the transparent substrate layer at the hologram relief surface, and one sheet material is adhered to the other sheet material at the inner surface of the substrate layer. A sealed package characterized by comprising: (2) The sealed package according to claim 1, wherein the substrate layer and the hologram relief surface are partially bonded. (3) The sealing package according to claim 1 or 2, wherein the adhesive force between the substrate layer and the hologram relief surface is smaller than the adhesive force between the inner surface of the substrate layer of one sheet material and the other sheet material. . (4) In the transparent relief hologram sheet, an uneven pattern corresponding to the hologram interference pattern is formed on the surface of the transparent layer, and a transparent thin film having a refractive index different from that of the transparent layer is provided thereon, so that the hologram relief surface is formed. The hermetic package according to any one of claims 1 to 3, characterized in that: (5) The hermetic package according to claim 4, wherein the transparent layer is provided on the surface of a transparent support layer. (6) The adhesive force between the transparent thin film provided on the uneven pattern of the transparent layer and the transparent layer is approximately equal to the adhesive force between the substrate layer and the hologram relief surface. A sealed package according to any one of the above. (7) The hermetic package according to claim 6, wherein adhesive strength between the transparent thin film provided on the uneven pattern of the transparent layer and the transparent layer is partially different. (8) The hermetic package according to any one of claims 5 to 7, characterized in that a release layer is partially provided between the transparent layer and the transparent support layer. (9) The sealing package according to any one of claims 1 to 8, wherein a hologram relief surface is provided on the entire surface of the transparent relief hologram sheet. (10) The hologram relief surface is provided only in the part of the transparent relief hologram sheet that corresponds to the area sandwiching the article, which is other than the area where the outer peripheries of both sheet materials are bonded to each other. Claim 1
The hermetic package according to any one of items 8 to 8. (11) In the area where both sheet materials are bonded to each other on the outer periphery, a cut is provided that surrounds the sealed article and reaches from the other sheet material to the vicinity of the adhesive layer between the substrate layer and the transparent relief hologram sheet. The hermetically sealed package according to any one of claims 1 to 10. (12) A heat-sensitive adhesive layer is provided on the inner surface of the substrate layer, a heat-sensitive adhesive layer is also provided on the surface to which the other sheet material is bonded, and both sheet materials are bonded by the both heat-sensitive adhesive layers. The hermetic package according to any one of claims 1 to 11, characterized in that: (13) The adhesive force between the inner surface of the substrate layer and the heat-sensitive adhesive layer provided on that surface is greater than the adhesive force between the substrate layer and the hologram relief surface.
A sealed package according to any one of the above. (14) The sealed package according to any one of claims 1 to 13, wherein the other sheet material, the substrate layer, and the transparent support layer are all made of polyester. (15) The hermetic package according to claim 14, wherein at least the other sheet material is made of amorphous polyester. (16) The other sheet material has the same configuration as the one sheet material, and the article is hermetically sealed between the two sheet materials by adhering the substrate layers of both sheet materials to each other. The hermetic package according to any one of claims 1 to 15. (17) The hermetic package according to any one of claims 1 to 16, wherein one of the sheet materials is formed into a shape corresponding to the shape of the article to be packaged.