JP3230312B2 - Hologram seal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal provided with a hologram image reproducible by a laser beam, and more particularly to a coherent light reproduction in which the hologram image is destroyed by peeling off the seal and cannot be reused. The present invention relates to a hologram seal such as a mold hologram seal.

[0002]

2. Description of the Related Art Conventionally, as a hermetic seal that can be determined to be illegally peeled, a brittle sheet which is easily broken by stress at the time of peeling is used as a base sheet for hermetic sealing, There are those using special adhesives that cannot be reattached, and these conventional seals are difficult to reseal even if you try to reseal after peeling, and it is difficult to reseal. The appearance can be easily determined.

[0003]

The above-mentioned hermetically sealed seal has a drawback that imitation products and similar products whose appearance resembles the seal are relatively easy to manufacture. If the seal is later resealed using the counterfeit product, it is difficult to visually determine whether the seal is a counterfeit product, and it is necessary to peel it off again and confirm that it is the correct seal Therefore, it is not easy to immediately know the fact of peeling as it is, and it may be difficult to immediately detect illegal peeling or unauthorized opening.

[0004] The present invention is a seal that makes it difficult to manufacture as a counterfeit product and that can be easily determined by a nondestructive inspection whether it is a genuine product or a counterfeit product. To be able to confirm.

[0005]

According to a first aspect of the present invention, there is provided a transparent base material sheet 1 having a surface which is easily peelable or agglomerated.
Easily breakable and transparent before and after peeling
The peelable transparent resin layer 2 for detecting unauthorized peeling, which is difficult to repair,
Are stacked, and the hologram layer 3 provided peelable through the peelable transparent resin layer 2, an adhesive layer 5 for adhering against the adherend laminated in this order, the hologram embossed surface 3a of the hologram layer 3 Is provided on the adhesive layer 5 side, and a light reflection layer 4 is provided between the hologram embossed surface 3a and the adhesive layer 5.

[0006] Next, the invention according to claim 2 of the present invention relates to a method in which one surface of the transparent substrate sheet 1 is provided with easy peeling property or cohesive failure easy peeling property.
Difficult to restore transparency before peeling after peeling
A hologram layer 3 provided with a peelable transparent resin layer 2 for detecting illegal peeling, and provided detachably via the peelable transparent resin layer 2, and an adhesive layer 5 adhered to an adherend. The hologram layer 3 is laminated in this order, and the hologram embossed surface 3 of the hologram layer 3
The hologram seal is characterized in that a is provided on the releasable transparent resin layer 2 side, and the hologram embossed surface 3a is provided with a light reflecting layer 4 of a metal-deposited thin film that does not deform the embossed shape.

[0007]

FIG. 1 (a) is a side sectional view showing an embodiment of a hologram seal according to the first aspect of the present invention, and FIG. FIG. 2 is a side sectional view showing an embodiment of the hologram seal of the invention according to claim 2 of the present invention, wherein a transparent base sheet 1 is made of a thermoplastic material such as polyvinyl chloride, polystyrene, polyethylene, polypropylene, polycarbonate, acrylic, and saturated polyester; Plastic film, or polyurethane, thermosetting plastic film such as unsaturated polyester can be used, the thickness can be set appropriately, for example,
About 0.02 mm to 0.1 mm is appropriate.

[0008] One surface of the transparent substrate sheet 1 is peelable and transparent.
Hologram layer 3 releasably laminated via resin layer 2
Is provided with a hologram embossed surface 3a capable of reproducing an image with incoherent light or coherent light, and the resin used has good emboss moldability when molding the embossed surface 3a , A transparent resin that hardly occurs, or a transparent resin that can withstand heating during appropriate transfer processing after molding, for example, an acrylic resin, a cellulose acetate butyrate resin, a nitrocellulose resin, an ethylcellulose resin, a methylcellulose resin, or the like is used. A different resin relatively incompatible with the various resins constituting the transparent substrate sheet 1 (a suitable solubility that does not exhibit good adhesiveness). Resin with parameter difference)
Is used to make it peelable.

The releasable transparent resin layer 2 comprises a transparent substrate sheet 1
And a resin that is easily compatible with both the hologram layer 3 and the easily peelable resin, or is composed of a resin that is easily compatible with any one of the two, Thermoplastic plastic film such as polyvinyl chloride, polystyrene, polyethylene, polypropylene, polycarbonate, acrylic, saturated polyester, or thermosetting plastic film such as polyurethane, unsaturated polyester, cellulose acetate butyrate resin, nitrocellulose resin, ethylcellulose resin, Methylcellulose resins, composite resins thereof, or resins obtained by mixing these resins with a small amount of silicone resin are used.

[0010] Further , it is used for the releasable transparent resin layer 2.
As the resin, for example, a transparent resin having fragility in a solidified state can be used.
Is, for example, relatively low polymerization degree polyvinyl alcohol,
Acrylic, polystyrene, polyvinyl chloride, nitrocellulose resin, acetylcellulose resin, cellulose acetate butyrate resin, thermoplastic resin such as vinyl chloride-vinyl acetate copolymer, or transparent ultraviolet curable polymer resin of these resin composites or The same electron beam-curable polymer resin, or a low-polymerization degree unsaturated polyester, urethane, epoxy-based transparent thermosetting polymer resin, or polypinyl alcohol, acrylic, polystyrene, polyvinyl chloride, or a resin thereof Composite UV-curable monomer resin or electron beam-curable monomer resin, etc., or polyester-based, urethane-based thermosetting monomer resin, etc., or silicone resin, paraffin wax, linseed oil-based transparent oil-based varnish, etc. Can be used.

The seal of the present invention is characterized in that the peelable transparent resin layer 2
The hologram layer 3 is laminated on one surface of the transparent base material sheet 1 through the intermediary of natural light, white light, or laser light (He-Ne gas laser) on at least one surface of the layer. A hologram image which is provided with a hologram embossed surface 3a capable of reproducing a hologram image with infinite parallel light by an Ar gas laser or the like and photographed by various holographic methods such as a Lippmann method;
An embossed pattern of interference fringes for obtaining a hologram image that can be reproduced by a coherent laser beam captured by a Fresnel holography method or a Fourier transform holography method is formed.

A light reflection layer 4 is formed on the hologram embossed surface 3a.
Vapor deposition of metal simple substance such as aluminum or alloy, metal sulfide such as zinc sulfide (ZnS), metal nitride, metal oxide such as titanium oxide (TiO) (vacuum vapor deposition method, sputtering method, ion plating method) (For example, metal deposition with a thickness of 300 to 1000 mm), plating, or sticking a metal foil.

The hologram according to the first aspect of the present invention.
In the seal, as shown in FIG.
A hologram layer is formed on the hologram layer 3 opposite to the resin layer 2.
An embossed surface 3a is provided, and a light reflecting layer 4 is formed on the embossed surface 3a.
The hologram of the invention according to claim 2 is formed.
In the case of a rubber seal, as shown in FIG.
Hologram embossing on the hologram layer 3 side on the light resin layer 2 side
The light reflecting layer 4 is formed by applying a surface 3a and depositing a thin metal on the embossed surface 3a so as not to deform the hologram embossed shape.

The hologram layer 3 can be made of a resin such as saturated polyester, acrylic, polystyrene, polyvinyl chloride, or polycarbonate having good moldability, or a transparent resin mainly composed of these resins.

The light reflecting layer 4 is made of an adhesive (pressure-sensitive adhesive) mainly composed of an acrylic resin or a vinyl resin, or an adhesive (dry heat-sensitive adhesive, rewet adhesive, wet emulsion type). Adhesive, wet solvent type adhesive) by a known coating method such as a bar coat, a blade coat, an air knife coat, a gravure coat, a roll coat or a solvent coat method, or a screen print method.
For example, a transparent adhesive layer 5 having a thickness of about 0.5 μm to 2.0 μm is provided, and a release sheet 6 (a release resin such as a silicone resin is adhered to the surface of the adhesive layer 5). On the surface side) is releasably attached.

The hologram layer 3 in the present invention is shown in FIG.
In (a), the coherent light L incident from the transparent substrate sheet 1 side is reflected by the light reflection layer 4 through the Fresnel hologram embossed surface 3a to form hologram interference light La, and the peelable transparent resin layer is again formed. 2 is emitted to the outside of the transparent base material sheet 1 through the transparent substrate sheet 1 and the emitted light is observed to observe the hologram image. The observed reproduced hologram image is composed of the peelable transparent resin layer 2 and the hologram layer. The sharpness of the image is changed by the transparency of the peelable transparent resin layer 2 as well as the interlayer adhesion between the transparent resin layer 3 and the adhesive layer. The resulting image is unclear.

FIG. 2 is an external perspective view of the seal A of the present invention. The surface of the transparent base sheet 1 is irradiated with laser light L (visible light) from an appropriate angle, and the light reflecting layer 4 in the inner layer is irradiated.
Can be observed as a hologram image.

Further, as shown in FIG.
A part or the entire surface of the transparent substrate sheet 1
An information display unit 11 that displays data information 12 that can be observed by illumination of incoherent visible light such as white light or natural light may be provided.
No. 2 is displayed directly on the surface of the transparent substrate sheet 1 or has an adhesive property, a penetrability, or a writing property on the surface of the transparent substrate sheet 1 with respect to a printing ink or a coloring liquid of a writing instrument such as a pen. It is possible to form the information display portion 11 in advance, and the information display portion 11 having adhesiveness or the like is provided on the surface of the transparent base sheet 1 by writing a resin anchor agent, penetrating kaolin, clay or the like. It may be formed by applying an appropriate coat layer, or a surface of the transparent base sheet 1 may be subjected to a fine uneven surface processing in advance. 11, data information 1 such as a bar code, a number, a character, etc., is appropriately printed by an information processing means and an information output means.
It is possible to print 2.

FIG. 3 shows a seal A in which a release paper (peeling sheet) 6 is peeled off from the seal A of the present invention, and is adhered to an adherend 7 such as a card, an envelope or a document via an adhesive layer 5. Seal inspection means 2 for inspecting and determining the authenticity of the seal A
FIG. 3 is a side view for explaining No. 3 and includes a means for reading a hologram image formed by hologram interference light, and a means for reading data information 12 displayed on the seal surface.

The hologram image reading means 21 includes a laser illuminator 21a for irradiating a laser beam L for reproducing a hologram image onto the sealing surface, and the illuminated laser beam L passing through the hologram layer 3 to the reflection layer 4. A hologram image formed by the hologram interference light La formed by reflection at a plane image (if the hologram image is a three-dimensional stereo image, any one of a front image, an intermediate image, and a rear image constituting the image) And an image reading unit 21b such as a CCD sensor provided with an appropriate lens optical system for detecting (focusing on the planar image or detecting by projecting onto a flat transmission type screen for projection) detection. Prepare.

The data information reading means 22 includes a light projecting section 22a (which may be a laser beam) such as ordinary white light for illuminating predetermined data information 12 printed on the information display section 11 on the surface of the seal A, And a reading unit 22b such as a CCD sensor or an OCR sensor for reading information by the reflected light of twelve.

At the time of reading inspection, the true hologram image is used as a reference pattern, the pattern is recorded in advance in a memory table for comparison inspection of the seal inspection means, and the seal inspection means 23 is used as a seal A (inspection object). The data information 12 recorded on the sticker A and a hologram image are read by moving and scanning in the XY directions (vertical and horizontal) relatively parallel to the surface, and the read hologram image is used as a reference pattern. When the hologram image is the same (or almost the same) as the reference pattern, the seal A is determined to be a normal seal (real seal), and when the hologram image is not read, the seal A is determined to be an incorrect seal. Is what you do.

[0023]

The hologram seal of the present invention is a transparent base sheet.
An easily peelable or brittle peelable transparent resin layer 2 is provided on one surface of
Since the hologram layer 3 that can be peeled off is provided,
Affixed to specified articles as a seal for sealing, sealing, and closing the lid
The seal has been peeled off and opened improperly
Means that the peelable transparent resin layer 2 is easy for the hologram layer 3
Peeling or cohesive failure causes peeling between hologram layer 3
Occurs, therefore, once the peelable transparent resin layer 2 of a vulnerability from the hologram layer 3 is peeled, the inside of the resin layer 2 loses transparency resulting fine cracks and breakage,
The reproduction light (natural light, white light, or laser light) illuminated on the surface of the seal causes light scattering when passing through the inside of the peelable transparent resin layer 2 and is illuminated by the light reflection layer 4 of the hologram layer 3 by the illumination. The reflected hologram interference light is also scattered, and the reproduced hologram image cannot be confirmed as a clear image, and it is difficult to restore the original optical characteristics (transparency) even if the hologram image is reattached. It can be seen that it has peeled off.

In the seal of the present invention, since the data information display section 11 is formed on the seal surface, the display section 11 can be appropriately viewed with ordinary incoherent visible light (white light, natural light, etc.). The data information 12 can be displayed, and the date, product number, and the like of the sealing seal, sealing seal, and lid seal can be displayed. The seal of the present invention includes the data information 12 that can be observed with ordinary visible light and the hologram layer 3 of a coherent light reproduction type in which hologram image information is first observed as visible information by irradiation with laser light (coherent light). Can be used as a seal with security performance using the data information 12 as dummy information.

The seal of the present invention is a heat-sensitive adhesive which is bonded through an adhesive layer 5 such as a pressure-sensitive adhesive or a solvent-evaporating adhesive or at a temperature at which the hologram embossed layer 3a of the hologram layer 3 is not destroyed. It can be used as a display sheet by adhering and fixing it appropriately to the surface of an article such as a card via an agent.

[0027]

According to the hologram seal of the present invention, a hologram image which can be reproduced by illumination of reproduction light using incoherent visible light or coherent laser visible light is hardly imitated. Yes, and with a releasable transparent resin layer that is destroyed by peeling the seal from the adherend, confirming whether the seal is genuine or imitation, and confirming whether the seal has been illegally opened Judgment can be made easily by non-destructive inspection.In addition to stickers, labels, cards, documents, etc., paper containers, plastic containers, metal containers, envelopes, envelopes, etc. This has the effect of being able to respond promptly.

[Brief description of the drawings]

FIG. 1A is an embodiment of the hologram seal of the present invention.
2 (b) is a hologram seal of the present invention.
FIG. 10 is a side sectional view of another embodiment.

FIG. 2 is an external perspective view of a hologram seal of the present invention.

FIG. 3 is a schematic side view of an inspection unit for inspecting a hologram seal of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent base material sheet 2 ... Releasable transparent resin layer 3 ... Hologram layer 3a ... Hologram embossed surface 4 ... Light reflection layer 5 ... Adhesive layer 6 ... Release paper 7 ... Adherent body 11 ... Data information display part 12 ... Data Information 21: Hologram image reading means 21a: Laser illuminator 21b: Image reader 22: Data information reader 22a: Illuminator 22b
Data information reading unit 23: Seal inspection means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-149585 (JP, A) JP-A-3-42298 (JP, A) Japanese Utility Model Application No. Sho 62-154479 (JP, U) Japanese Utility Model Utility Model No. 2- 58278 (JP, U) Japanese Utility Model 62-43378 (JP, U) Japanese Utility Model Application Hei 4-9977 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09F 3/00-3 / 20

Claims (2)

(57) [Claims] 1. One surface of a transparent substrate sheet 1 is provided with easy peelability or
Cohesive failure easily peelable and transparent before peeling after peeling
Releasable transparent resin layer for detecting unauthorized peeling, which is difficult to restore brightness
And a hologram layer 3 which is releasably provided via the releasable transparent resin layer 2 and an adhesive layer 5 which adheres to the adherend in this order. A surface 3 a is provided on the side of the adhesive layer 5, and a light reflecting layer 4 is provided between the hologram embossed surface 3 a and the adhesive layer 5.
A hologram seal comprising: 2. One surface of the transparent substrate sheet 1 is provided with easy peelability or
Cohesive failure easily peelable and transparent before peeling after peeling
Releasable transparent resin layer for detecting unauthorized peeling, which is difficult to restore brightness
And a hologram layer 3 which is releasably provided via the releasable transparent resin layer 2 and an adhesive layer 5 which adheres to the adherend in this order. A hologram seal comprising: a surface 3a provided on the side of the releasable transparent resin layer 2; and a hologram embossed surface 3a provided with a light-reflective layer 4 of a metal-deposited thin film that does not deform the embossed shape.