JPH117244A - Hologram thin leaf body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the hologram thin leaf body which displays new singular design effect. SOLUTION: This body has a laminate structure formed by adhering a base material 1, an adhesive layer 2, a metal thin layer 3 which has a smooth surface, and a transparent or translucent resin layer 4 in this order. This hologram leaf body A has a smooth surface at least for the top surface 3a of the metal thin layer 3 and also has a hologram pattern 5 formed of fine unevenness on the surface of the transparent or translucent resin layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram thin body, and more particularly, for example, when printing is performed on a hologram pattern, the hologram pattern at the printing location disappears and the printing location is replaced with a transparent metal-like material. The present invention relates to a novel hologram thin body that exhibits a new design effect that has not been seen before, such as being visually recognized in color tone.

[0002]

2. Description of the Related Art For example, various printed materials having a hologram pattern formed on the surface thereof have been used in a wide range of industrial fields due to the peculiarity of the design effect that the pattern is visually recognized in three dimensions. For example, it is a thin body such as wrapping paper. A conventionally known hologram thin leaf is manufactured as follows. First, for example, after engraving a predetermined hologram pattern composed of minute irregularities recorded as light interference fringes on one side of a predetermined resin sheet by, for example, stamper printing, for example, Al is vacuum-deposited on the surface of the hologram pattern to reflect light. Form a layer.

[0003] For example, after adhering another resin sheet or paper to the surface of the Al light reflection layer using an adhesive, the resin sheet having the light interference fringes is peeled off. Hologram thin body.
Therefore, in the case of a conventional hologram thin leaf, the hologram pattern surface exhibiting a design effect is, for example, a surface covered with a thin Al layer.

[0004]

By the way, as a recent tendency, the taste of general consumers has been individualized,
Along with this, individual and novel design effects are required for products purchased by themselves. Considering this from the standpoint of the seller, there is a need for the development of a product having a design effect that is differentiated from other products. For this reason, it has become important to provide a hologram thin body with an unprecedented design effect.

[0005] The simplest method for exhibiting a new design effect on the above-mentioned conventional hologram thin leaf body is to print a desired pattern on the hologram pattern surface and to obtain a good design effect by combining the hologram pattern and the print pattern. It is to demonstrate. However, in the case of a conventional hologram thin body, the hologram pattern surface is formed of a thin metal layer such as Al. Therefore, even when printing is performed, the hologram pattern existing under the print pattern is not easily erased. There is a problem that it is difficult to obtain an extremely novel and unique design effect.

In view of the recent demand for the design effect of a hologram thin body, the present invention provides a novel hologram thin body having a design effect that cannot be exhibited by a conventional hologram thin body at all, and also has a forgery prevention effect. With the goal.

[0007]

In order to achieve the above-mentioned object, in the present invention, a substrate, an adhesive layer, a thin metal layer having a smooth surface and a transparent or translucent resin layer are arranged in this order. A hologram thin body having a laminated structure formed by bonding and having a hologram pattern formed on the surface of the transparent resin layer is provided, and particularly preferably, the transparent or translucent resin layer is provided. Is provided with a transparent or translucent resin for imparting printability with a thickness that does not erase the hologram pattern. Further, there is provided a hologram thin body in which the metal thin layer is formed in a desired plane pattern.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 1 shows an example A of a hologram thin leaf of the present invention. FIG. 1 is a cross-sectional view showing a laminated structure constituting the hologram thin body A. As shown in FIG. 1, the hologram thin body A has a laminated structure in which an adhesive layer 2, a metal thin layer 3, and a transparent or translucent resin layer 4 are adhered to a substrate 1 in this order. ing.

Then, in the case of the hologram thin leaf A,
At least the upper surface 3a of the thin metal layer 3 has a smooth surface, and a hologram pattern 5 composed of minute irregularities is formed on the surface of the transparent or translucent resin layer 4. Here, the substrate 1 is not particularly limited. Specifically, various resin sheets, paper, synthetic paper, cloth, non-woven fabric and the like can be mentioned. The substrate 1 may be transparent or opaque.

The adhesive layer 2 functions to bond and fix the base material 1 and the thin metal layer 3, and cures an adhesive capable of bonding both the base material 1 and the thin metal layer 3. It is formed with things. Such an adhesive is preferably a two-component curable adhesive or a photocurable adhesive used for dry lamination.

The two-part curable adhesive is of a type that cures with the passage of time, and can be cured in a shorter time by heat treatment. For example, a urethane resin adhesive or an epoxy resin adhesive Can be given. The photo-curable adhesive is of a type that is cured by irradiation with an electron beam or ultraviolet rays, and examples thereof include a urethane resin adhesive and an acrylic resin adhesive.

The thickness of the adhesive layer 2 is not particularly limited, but is preferably, for example, about ^{2 to} 8 g per square meter. The metal constituting the thin metal layer 3 is not particularly limited, and for example, Al, Ag, Z
n, Cu, Sn, Si, and the like. Of these, A is expensive in terms of price and easy to form thin layers.
l is preferred.

The thickness of the thin metal layer 3 is not particularly limited. However, if the thickness is too large, the thickness becomes useless in terms of the effects to be described later, and if the thickness is too small, the metal luster does not exhibit a predetermined metallic luster in the first place. The last transparent or translucent resin layer 4 has a hologram pattern 5 made of fine irregularities engraved on the surface thereof, and the back surface thereof is bonded to the upper surface 3 a of the thin metal layer 3.

The transparent or translucent resin layer 4 is a cured product of a transparent or translucent resin adhesive capable of adhering to a thin metal layer and transparent to white light. More specifically, a two-component curable type such as a two-component curable urethane resin adhesive, a polyester resin adhesive, or an epoxy resin adhesive; a photocurable urethane resin adhesive, an acrylic resin adhesive,
It is formed by heat-curing or light-curing a transparent or translucent adhesive such as a photo-curable adhesive such as a UV-curable resin adhesive.

Although the hologram thin body A of FIG. 1 shows a case where the transparent or translucent resin layer 4 is a single layer, the resin layer 4 is not limited to a single layer. As shown in FIG. 2, there may be a structure A in which another transparent or translucent resin layer 6 is interposed between the back surface of the resin layer 4 and the upper surface 3a of the thin metal layer 3. In this case, the resin layer 6 functions as a buffer layer when the volume shrinkage of the transparent or translucent resin used for forming the resin layer 4 is relatively large when the resin layer 4 is formed in a manufacturing process described later, This serves to enhance the adhesion between the resin layer 4 and the thin metal layer 3.

Therefore, the resin used to form the resin layer (buffer layer) 6 may be a soft resin having an adhesive property to the thin metal layer 3 and the resin layer 4 and absorbing volume shrinkage. Preferably, specifically, polyester resin, polyether resin, polyurethane resin and the like can be used. When the resin layer 4 is formed of a resin having a relatively small volume shrinkage at the time of curing, such as a photocurable resin, it is not always necessary to form the resin layer 6 described above.

The hologram thin leaf A can be manufactured as follows. The case where the metal thin layer 3 is an Al thin layer will be described. First, as shown in FIG. 3, Al is deposited on a surface 7a of a resin sheet 7 such as a polypropylene sheet to form an Al thin layer 3 having a desired thickness as shown in FIG.

At this time, it is preferable to use a resin sheet 7 having a surface 7a as smooth as possible. This is because a peeling step of the resin sheet 7 described later proceeds smoothly. Then, an adhesive capable of forming the above-mentioned adhesive layer 2 is applied to a desired thickness on the surface 3b of the Al thin layer 3 and the substrate 1 is placed thereon, and then the whole is subjected to, for example, thermocompression bonding. Then, the resin sheet 7 is peeled off from the Al thin layer 3 to form a laminate A1 as shown in FIG.

At this time, the adhesive force between the Al thin layer 3 and the resin sheet 7 is such that the surface 7a of the resin sheet is smooth.
The adhesive strength between the thin Al layer 3 functioning via the adhesive layer 2 and the substrate 1 is extremely weak. Therefore, the Al thin layer 3
The resin sheet 7 can be easily separated from the Al thin layer 3 without causing a separation phenomenon between the resin sheet 7 and the substrate 1. On the other hand, as shown in FIG. 5, a hologram sheet 8 made of, for example, a resin having a desired hologram pattern engraved on the surface is prepared. As the hologram sheet 8, a commercially available hologram sheet may be used as it is.

Then, an uncured and viscous resin 4A to be converted into the transparent or translucent resin layer 4 is applied to the hologram pattern surface of the hologram sheet 8 at a desired thickness. The minute irregularities forming the hologram pattern of the hologram sheet 8 are buried with the resin 4A. Then, when the resin 4A is in an uncured state, the Al thin layer 3 of the laminate A1 shown in FIG. 4 and the resin 4A are overlapped, and then, for example, the whole is thermocompression-bonded.

As a result, as shown in FIG. 6, the above-described resin 4A is cured to form an integrated product converted into a transparent or translucent resin layer 4. Finally, by peeling off the hologram sheet 8, the hologram pattern of the hologram sheet is transferred to the transparent or translucent resin layer 4 in a negative-positive relationship, and the hologram thin leaf shown in FIG. Body A is obtained.

When manufacturing the hologram thin leaf A shown in FIG. 2, the A in the laminate A1 shown in FIG.
The resin which becomes the resin layer (buffer layer) 6 may be applied, for example, by gravure printing to the entire surface of the thin layer 3, and then the resin 4A in FIG. . FIG. 7 is a cross-sectional view showing a more preferable hologram thin leaf body B of the present invention.

In the hologram thin body B, a transparent or translucent resin thin layer 9 is formed by applying a transparent or translucent resin to the hologram pattern 5 of the hologram thin body A shown in FIG. Is what it is. The transparent or translucent thin resin layer 9 is formed to impart printability to the hologram pattern surface when printing is performed on the hologram pattern 5. Therefore, this thin layer 9
The hologram pattern 5 is formed so as not to have such a thickness as to be embedded therein. Fine unevenness is thin layer 9
This is because the hologram pattern 5 cannot be visually recognized when the hologram pattern 5 is buried.

Usually, since the depth (or height) of the fine irregularities in the hologram pattern 5 is about 0.1 to 0.4 μm, the thickness of the thin layer 9 is set to 0.1 μm or less. Is preferred. The thin layer 9 can be formed by diluting a commonly used underlacquer with a low-boiling solvent such as ethyl acetate, applying the solution by a method such as gravure printing, and then drying. .

FIG. 8 shows another hologram thin sheet C of the present invention.
FIG. As shown in FIG. 8, the hologram thin body is such that the thin metal layer 3 of the hologram thin body A shown in FIG. 1 is formed in a desired plane pattern. That is, the metal thin layer 3 is not located as a single thin layer on the back surface of the transparent or translucent resin layer 4, but a portion where no metal exists corresponding to the plane pattern is formed on the metal thin layer 3. Have been.

This flat pattern is formed by forming the thin metal layer described with reference to FIG. 3 and then etching the thin metal layer in a desired pattern, or by masking the resin sheet 7 in a desired pattern during the deposition. And can be formed. Then, by the application of the adhesive in the subsequent process, the above-mentioned place where there is no metal is filled with the adhesive.

This plane pattern can also be formed as follows. First, the Al thin layer 3 shown in FIG.
The transparent or translucent adhesive 10 is patterned on the front surface 3b of the surface 3b with the same plane pattern as that to be formed (FIG. 9). Next, after bonding the base material 1 onto the adhesive 10 forming the planar pattern (FIG. 10), the resin sheet 7 is peeled off.

The portion of the Al thin layer 3 adhered to the adhesive 10 is left as it is, and the other portion is removed together with the resin sheet 7, and as a result, as shown in FIG. Is a flat pattern of an Al thin layer formed with the same flat pattern as that of the adhesive 10. Then, the hologram sheet 8 is peeled off after the resin 4A shown in FIG. 5 is overlaid on the plane pattern portion of the Al thin layer, thereby obtaining the hologram thin body C shown in FIG.

The hologram pattern of the hologram thin body C is also formed with a transparent or translucent resin thin layer 9 to impart printability as in the case of the hologram thin body B shown in FIG. Needless to say, it is good. FIG. 12 is a cross-sectional view showing still another hologram thin leaf body D of the present invention. This hologram thin body D is attached to the back of the base material 1 in the hologram thin body A shown in FIG. 1 on the side of the pressure-sensitive adhesive layer 11b of the release sheet 11 in which the pressure-sensitive adhesive layer 11b is formed on the base sheet 11a. In the case of the hologram thin body D that has been attached, the base sheet 11a can be peeled off and attached to a wall or the like.

Next, the unique design effect of the hologram thin body of the present invention which has been described above will be described. (1) First of all, it can be generally said that the hologram pattern surface is made of resin, and when the transparent or translucent resin thin layer 9 for imparting printability like the thin leaf body B is formed, the hologram pattern surface is still formed. Furthermore, it is easy to give a desired print pattern to the hologram pattern.

In particular, in the case of the thin leaf body B, a desired print pattern can be easily provided by all printing methods such as offset printing, UV offset printing, gravure printing, silk screen printing, and flexographic printing. This means
This is an excellent function as compared with a conventional hologram thin leaf body in which the hologram pattern surface is formed of Al.

(2) In the case of the hologram thin body of the present invention,
When a printing pattern is formed with transparent ink on the hologram pattern on the surface so that the fine irregularities of the hologram pattern are buried, at the place of the printing pattern, the hologram pattern which has been visible until then disappears, and instead, the transparent pattern becomes transparent. Metallic luster with a feeling can be visually recognized. This phenomenon also shows a transparent metallic color even when a transparent adhesive tape is stuck or drawn with magic ink of various colors.

At a place where no printed pattern is formed, the conventional hologram pattern is visually recognized. That is, a hologram pattern partially remains. The thin metal layer 3 is colored in a desired color during the manufacturing process of the hologram thin body, or the transparent or translucent resin layer 4 or the resin thin layer 6 (in the case of the thin body A) is colored in a desired color. By doing so, a colored hologram thin leaf can be obtained.

This is an unprecedented effect in that a design effect in which a hologram pattern and a metallic color tone are mixed can be exhibited very easily without applying the hot stamping method as in the related art. . (3) In the case of the thin-leafed bodies A and B, the desired characters are formed on the hologram pattern surface with a very thin line using transparent ink.
When a pattern or the like is printed and drawn, it is very difficult to read the print with the naked eye. However, when the printed and drawn portion is copied by, for example, an electronic copying machine, the effect is obtained that the characters and designs printed and drawn are clearly copied on the obtained copy paper.

(4) Further, the hologram thin body C of the present invention
In the case of (1), if the plane pattern of the thin metal layer to be formed and the pitch of the above-mentioned metal-free portion are appropriately set, the following phenomena appear. In other words, when the angle between the hologram pattern surface and the line of sight is changed, the hologram pattern disappears at a certain angle and only the flat pattern of the thin metal layer can be visually recognized, and at another angle, the hologram pattern is strongly visible. This is a phenomenon that the plane pattern of the thin metal layer is not conscious.

This is a unique design effect that cannot be obtained from the conventional hologram thin leaf.

[0037]

As is apparent from the above description, the hologram thin leaf of the present invention exhibits a new and unique design effect which is difficult to obtain with a conventionally known hologram thin leaf. This is a unique effect brought about by forming a hologram pattern on the surface of a transparent or translucent resin layer and disposing a thin metal layer having high reflectivity under the transparent or translucent resin layer.

The hologram thin leaf of the present invention not only exhibits a new design effect but also has a great industrial value as a material having an anti-counterfeiting effect.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a hologram thin leaf body A of the present invention.

FIG. 2 is a cross-sectional view showing another hologram thin leaf body A of the present invention.

FIG. 3 is a cross-sectional view showing a state in which a thin metal layer is formed on a resin sheet in a manufacturing process of the hologram thin leaf member A.

FIG. 4 is a sectional view showing a laminate A1.

FIG. 5 is a cross-sectional view showing a state in which an uncured transparent or translucent resin is applied to a hologram pattern surface of a commercially available hologram sheet in a manufacturing process of the hologram thin body A.

6 is a cross-sectional view showing a state where the thin metal layer of the laminate A1 of FIG. 4 and the transparent or translucent resin of FIG. 4 are bonded together.

FIG. 7 is a sectional view showing a hologram thin leaf body B of the present invention.

FIG. 8 is a sectional view showing a hologram thin leaf body C of the present invention.

FIG. 9 is a cross-sectional view showing a state where a flat pattern of an adhesive is formed on the surface of the thin metal layer.

FIG. 10 is a cross-sectional view showing a state in which a base material is bonded on the plane pattern of the adhesive of FIG. 9;

11 is a cross-sectional view showing a state where the resin sheet of FIG. 10 is peeled off.

FIG. 12 is a sectional view showing a hologram thin leaf body D of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Adhesive layer 3 Metal thin layer 4 Transparent or translucent resin layer 5 Hologram pattern 6 Transparent or translucent resin layer 7 Resin sheet 8 Hologram sheet 9 Transparent or translucent resin thin layer 10 Transparent or translucent Adhesive Plane Pattern 11 Release Sheet

Claims (4)

[Claims] 1. A laminated structure in which a substrate, an adhesive layer, a thin metal layer having a smooth surface and a transparent or translucent resin layer are adhered in this order, and a surface of the transparent or translucent resin layer is provided. A hologram thin body, wherein a hologram pattern is formed on the hologram thin body. 2. The hologram thin leaf according to claim 1, wherein a transparent or translucent resin for imparting printability is applied to a surface of the transparent or translucent resin layer so as not to erase the hologram pattern. 3. The hologram thin leaf according to claim 1, wherein the thin metal layer is formed in a desired plane pattern. 4. The hologram thin body according to claim 1, wherein a release sheet is attached to a back surface of said base material via an adhesive layer.