JP5659820B2 - Hologram sheet - Google Patents

Description

The present invention relates to a hologram sheet, a hologram label, and a hologram transfer sheet (hereinafter also referred to as a hologram sheet or the like), and specifically, formed so as to recognize two types of colored patterns having different visibility as if they were one pattern. Accordingly, the present invention relates to a forgery-preventing hologram sheet, a hologram label, and a transfer sheet that have high anti-counterfeiting properties and can easily determine their authenticity.
In the present specification, “parts” indicating blending are based on mass unless otherwise specified. The “hologram” includes a hologram and a hologram having a light diffractive function such as a diffraction grating.
Further, “haze (also referred to as haze value)” is obtained according to JIS K 7136 “Plastic—How to Obtain Haze of Transparent Material”, and “of the transmitted light transmitted through the test piece, “Percentage of transmitted light deviated by 2.5 ° or more from incident light due to forward scattering”, which is defined as “ratio of diffuse transmittance to total light transmittance (parallel transmittance + diffuse transmittance)”.

(Main use) The main use of the hologram sheet of the present invention is a hologram sheet used in the field of anti-counterfeiting and design, etc., specifically,
(1) Various product fields, such as genuine products manufactured by manufacturers, where certification of genuine products is significant, such as electronic equipment, electrical equipment, computer-related products, and their components, computer-related software, genuine equipment (paper Consumables such as printers and toner etc.) Pharmaceuticals, quasi-drugs or chemicals,
(2) Fields where consumers are strongly required that the product itself is a genuine product, or by adding a sheet, etc., to improve designability, to show that the product is expensive, and to add value to the product Such as books, documents, lectures, plays, movies, photographs, paintings, sculptures, prints, drawings, models, etc., or edits thereof, or those recorded on a recording medium (video cassettes, compact discs, Copyrighted materials such as digital video discs, etc., ROM boards that have been set and prevented from being changed (used for computer equipment, game machines, game machines, etc., including stickers across ROMs and boards). Watches, neckties, mufflers, clothing and other clothing, handkerchiefs, neckerchiefs, bags, bags, belts, wallets, accessory cases, jewelry, jewelry and other jewelry, sports Supplies, cosmetics, tableware, commemorative cup, key chains, figurines, vases, pottery, dolls, furniture acids, joinery, umbrellas, walking sticks, food containers, cigarettes, cigars, etc., and their luxury brands Hinto,
(3) Identification method (ID card) field, such as passport, driver's license, insurance card, membership card, identification card, resident registration card, hospital card, library card, etc.
(4) Fields that are required to be genuine in order to maintain economic order, such as gift certificates, gift certificates, etc., or prepaid cards, credit cards, cash cards, etc.
(5) Further, the field of packaging these items and sealing the packaging, for example, the field of simply storing or putting them in an envelope as mail or small parcels, or delivering and delivering them in a package, The field of selling products in packages, the field of simple packaging, the field of using them as seals, and verifying their authenticity in their instructions and indications, and identifying them as generic drugs Field to stick to
(6) Or those provided for services that provide these, such as proof of providing various services, proof of loaned items, and proof of receiving various services, etc.
In particular, the manufacturer, publisher, author, game machine operating company, luxury brand, certificate issuer, card security company, vouchers, etc.・ Names of delivery companies, sales companies, other related organizations, logos, seals, and other characters, figures, symbols, etc. that have distinguishability from other companies, that is, brand logo display, authenticity characters, symbols, etc. The logo, characters, graphics, symbols, and the like are suitable for fields where the added value of the product and the reliability such as quality assurance are improved (proven).

(Prior Art) In recent years, a hologram capable of reproducing a three-dimensional image (3D image) using light interference has been developed. This hologram requires advanced manufacturing technology and has various forms such as labels, seals, and foils. Therefore, it is applied and applied to a part of various things including the above field as a means for preventing forgery.
This hologram has been widely used since it can be seen at a glance whether it is genuine or not and is difficult to manufacture as described above.
In other words, as a means of preventing counterfeiting, various items such as credit cards such as credit cards, certificates, etc., or cover of books, pamphlets, record jackets, packages, clothing, etc. aiming at novelty of the appearance Attempts have been made to provide them.
In order to enhance the decorativeness and anti-counterfeiting property of such a hologram, a predetermined “picture” is imparted to the hologram. That is, an attempt has been made to provide a “picture” on the surface of a hologram-attached label attached to an article by printing or the like.
Conventionally, the present applicant has sequentially laminated a support with a hologram with a pattern, a hologram forming layer, a transparent reflective thin film layer, an adhesive layer, and a release sheet as necessary on the support. In addition, it has at least one “pattern” layer between any of the above-mentioned layers, and the “pattern” and the hologram reproduction image are integrated in harmony, and the “adhesion” label with a pattern is pasted. It is beautiful in harmony with the design, color, and color of the body, and is useful as a hologram hologram, and has high anti-counterfeiting properties when it is affixed to credit cards such as credit cards and luxury products. We provide labels with holographic images that can be demonstrated.
In particular, when an “image” layer is provided adjacent to (attached to) the transparent reflective thin film layer and the “image” is to be rewritten, the transparent reflective thin film layer is damaged and the rewritten “image” It can be easily discriminated whether or not it is, and it is possible to prevent forgery (see Patent Document 1).

Further, the support on the outermost surface of these hologram labels is a resin film, and it is said that the resin film alone is insufficient in durability such as scratch resistance of the added pattern, so that the hologram label surface has scratch resistance, etc. In addition, a hologram label with improved durability, a transparent back side, and excellent texture, and a method for manufacturing the same are also disclosed (see Patent Document 2).
However, the “pattern” layer and the “printing” layer added to these hologram labels are formed by selecting ink pigments and dyes suitable for each printing method by a general coating method or a general printing method. However, if you try to rewrite the “pattern” layer, the “transparent reflective thin film layer” in contact with the “pattern” layer will be damaged, and it is physically possible to rewrite only the “pattern” layer. It is intended to prevent counterfeiting because of its difficult nature.
Also in Patent Document 2, the “printing” layer is only described as “printing by known screen printing or gravure printing using a known ink without being particularly limited by a known printing method”. However, “similar visibility” to a genuine hologram (although it does not form a specific “image” like a hologram reproduction image when visually observed, it reflects light partially or partially. It is possible to create a counterfeit product by applying a “printing” layer with exactly the same color tone to a label that has been given a “similar optical effect”. it was thought.
Furthermore, in the region where the “printing” layer is formed, the “printing” layer blocks the optical effect of the hologram (the “printing” layer emphasizes the “printing design” in front of the viewing side). And the “printing” layer hardly transmits light.) Forgery attempts to “reproduce” the optical effect of the hologram on the portion where the “printing” layer is formed. (Usually, this “printed” layer-forming area occupies most of the total area of the label), and only a small area other than the “printed” layer-forming area “looks like an authentic hologram” Since it is only necessary to create an “effect”, it has a drawback that it becomes easy to forge.
In order to solve this problem, in order to develop the hologram effect also on the “printing” layer formation region, the present applicant provides a transparent reflective thin film layer on the hologram relief, and the transparent reflective thin film layer on the transparent reflective thin film layer. A technique is disclosed in which a “printing” layer is provided in part and a totally transparent reflective thin film layer is provided so as to cover the entire layer (see Patent Document 3).
However, this technique not only makes the process of manufacturing a hologram very complicated, but, like other patent documents, the “printing” layer is a general one, and the “printing” layer itself is No anti-counterfeiting property is provided, so it is still impossible to prevent forgery similar to the above, providing a more advanced anti-counterfeiting effect by providing the anti-counterfeit function to the “printing” layer itself. It was something that could not be done.

Japanese Utility Model Publication No. 5-18779 JP 2007-86251 A Japanese Patent Application Laid-Open No. 7-129069

  The present invention provides three types of colored pattern layers (“printing” layers) on the upper and lower sides of the hologram formation layer, the type that transmits the hologram reproduction image, the type that erases the hologram reproduction image, and the type behind the hologram reproduction image. Although it is observed as if a single colored pattern is combined with the hologram, depending on a predetermined observation method, the three types can be easily discriminated visually. Provided are a hologram sheet, a hologram label, and a hologram transfer sheet, which are excellent in prevention and easy to determine authenticity.

To solve the above problem,
State-like hologram sheet of the present invention,
A hologram forming layer provided with a hologram relief on one surface of the transparent resin layer, a transparent colored pattern layer A formed on the other surface of the transparent resin layer, and a colored pattern layer B1 formed so as to fill the hologram relief A hologram sheet comprising: a transparent reflective thin film layer provided in contact with the hologram relief or the colored pattern layer B1, and a colored pattern layer B2 provided on the transparent reflective thin film layer; The hologram sheet is obtained by making the light transmittance of the colored pattern layer B1 lower than the light transmittance of the transparent colored pattern layer A and making the saturation of the colored pattern layer B2 larger than the saturation of the colored pattern layer B1. When observed from the transparent resin layer side, the transparent colored pattern layer A, the colored pattern layer B1, and the colored pattern Layer B2 is, exhibits the same color, is characterized in that is visually recognized as one of the pattern C formed by the color.

A hologram, on the other hand, irradiates (illuminates) a laser beam, which is light having temporal and spatial coherence, to a “three-dimensional object” to be reproduced as a hologram reproduction image. The “light” (which is called “object light”) reflected and scattered (diffracted) on the surface of the light is incident on the photosensitive material at a predetermined angle, and on the other hand, the laser light itself (this is “reference light”). Is incident on the photosensitive material at an angle different from the incident angle of the “object light”, causing the “object light” and the “reference light” to interfere with each other. The generated “interference fringes” are recorded on the photosensitive material.
This hologram forming method is one of the hologram forming methods based on the photographing method, and is also called “two-beam flux method”.
Since the “object light” and the “reference light” are coherent with each other, a clear interference fringe is generated in the photosensitive material, and the interference fringe is recorded.
First, as a simple case, when the reference light and the object light are both parallel light and form a predetermined angle, the difference in the length of the path (light path) to the photosensitive material surface of the two lights Therefore, due to the difference in phase of the two light beams, they are strengthened at one position on the surface of the photosensitive material and weakened at another position. As a result, the photosensitive material has an equal interval determined by the angle between the reference light and the object light. Thus, interference fringes extending in the direction perpendicular to the surface of the photosensitive material are recorded.
The contrast of the interference fringes is greatest when the amplitudes of the reference light and the object light are equal, and decreases as there is a difference. Since the object light is light that changes depending on the three-dimensional shape of the “three-dimensional object” and is not parallel light, the interference fringes are disturbed.
However, the disturbance is caused by a change in the phase of the object light relative to the reference light as a lateral shift of the interference fringe, and a change in the amplitude as a change in contrast. The photosensitive material records all the information on the phase and amplitude of the object light. The A hologram obtained by developing the photosensitive material thus exposed becomes a hologram.

This hologram does not show an object image like a photograph taken with an ordinary camera, and it appears to be uniformly clouded (as a refractive index distribution), but close to the wavelength of light. Object information is completely recorded with fineness.
As this photosensitive material, a photoresist is used, and the photoresist surface is provided with irregularities of a desired depth by managing the development time of the photoresist. This is a relief hologram. , The depth of the unevenness and the periodic disturbance, and the disturbance includes information on the phase and amplitude of the object light.
The uneven surface is a hologram relief surface, and the “photosensitive material layer having an uneven surface” at this time is a “hologram forming layer having a hologram relief on one surface”.
When this hologram is illuminated with, for example, the same laser light as the reference light described above, the interference fringes recorded in the photosensitive material act as a diffraction grating that changes the traveling direction of the light.
When light enters the diffraction grating, in addition to the directly transmitted light (zero-order diffracted light) that is transmitted as it is, two diffracted lights of plus and minus first order are added in the direction determined by the spacing of the grating, in this case, the spacing of interference fringes. Arise.
When creating a hologram, if parallel light with a predetermined angle between the object light and the reference light is used, the first-order diffracted light of the first and second order when the hologram is illuminated is both parallel light. Yes, the former proceeds in the direction in which the original object light passes through the photosensitive material.
Since the actual interference fringes are disturbed by the phase and amplitude of the object light, the plus first-order diffracted light is disturbed so as to correspond to it, and the original object light is reproduced as it is. When viewed through the hologram, the object is three-dimensionally reproduced at the original position without being disturbed by the zero-order and minus first-order diffracted light. This image is called a direct image, and it becomes a virtual image because it appears as if it were diverging from an object. On the other hand, another minus first-order diffracted light reproduces an image that is reversed from the original object on the right side of the hologram. This is called a conjugate image and becomes a real image because the light is actually focused.
When this direct image is observed by changing the viewing position, it can be confirmed that the relative positions of the front and rear three-dimensional objects are changed and reproduced three-dimensionally.
This situation is the same also in the relief hologram. When the hologram relief surface of the hologram forming layer described above is illuminated with a predetermined “reference light”, a direct image (hologram reproduction image) appears at a predetermined angle.
When this hologram relief surface is positioned as a “reflection surface”, the “reflected light” on the hologram relief surface causes its direct image to appear in a direction determined by a predetermined angle. The real image which is the conjugate image is the same.

In the hologram sheet of the present invention, the hologram relief surface formed on one surface of the transparent resin layer is used as a reflection surface, and reference light (meaning illumination light) is incident from the other surface of the transparent resin layer. Light transmitted through a “hologram forming layer made of a resin layer” (hereinafter referred to as “hologram forming layer”) and reflected by the hologram relief surface (reflection surface) (light containing information on a three-dimensional object). However, the hologram reproduction image is visually recognized by the light transmitted through the hologram forming layer and returning to the reference light incident side.
Further, in the hologram sheet of the present invention, the transparent colored pattern layer A is formed on the other surface (the surface on which the hologram relief is not formed) of the hologram forming layer, and the “pattern” represented by the transparent colored pattern layer A (Pattern a) is visually recognized as a “pattern” (pattern a) of the same color as the transparent colored pattern layer A.
Further, the hologram sheet of the present invention is formed with a colored pattern B1 formed so as to fill the hologram relief of the hologram forming layer, and the “pattern” (pattern b1) represented by the colored pattern B1 is the colored pattern layer. It is visually recognized as a “pattern” (pattern b1) of the same color as B1.
Further, the “pattern” (pattern b2) represented by the colored pattern layer B2 (which is visually recognized through the transparent reflective thin film layer) provided on the transparent reflective thin film layer is the colored pattern layer B2 and “ It is visually recognized as a “pattern” (pattern b2) of “the same color”.
The “pattern a” of the transparent colored pattern layer A, the “pattern b1” of the colored pattern B1, and the “pattern b2” of the colored pattern layer B2 constitute “one pattern C having one color”. Therefore, due to the identity of this “color”, it is observed that one “pattern C” is formed on the hologram sheet of the present invention.

In the first place, "color" is the "information" that the reflected light from the "object" is recognized (viewed) by the three elements of hue (hue), saturation (brightness), and brightness (brightness). is there.
The so-called `` color tone '' means a color shade, brightness, intensity, etc., i.e., a hue, and is a concept that combines `` saturation '' and `` lightness ''. It means the tone.
Therefore, the “same color” here means that two or more “objects” “present the same color”, and they have “the same hue” and “the same color tone”. It means that when they are visually recognized, they are recognized as “the same color”.
That is, the transparent colored pattern layer A, the colored pattern layer B1, and the colored pattern layer B2 are prepared by dispersing and dissolving a dye or pigment in a resin having transparency. Solubility, size and shape of pigment particles, surface condition, other additives, and formation method, drying conditions at the time of formation, curing conditions, as well as thickness, interface state, hue, color Degree, brightness, and "color" will be decided.
When the reflective layer is provided on the back surface of the transparent colored pattern layer A or the colored pattern layer B1 to reflect light, the above three elements change depending on the wavelength of the light or the intensity of the light. As a result, the visually recognized “color” is different.
Further, in the case of the colored pattern layer B2 provided behind the transparent reflective layer, which is a transparent reflective thin film layer, part or most of the illumination light directed to the colored pattern layer B2 is transparent in front. Since the light is reflected by the reflection layer, the three elements of the reflected light change depending on the reflection / transmission characteristics of the transparent reflection layer, and as a result, the “color” to be visually recognized is different.
As described above, the “same color” in the present invention means that the visually recognized “color” is “same”.
Accordingly, the “color” visually recognized in the transparent colored pattern layer A is affected by the hologram reproduction image described above, and the colored pattern layer B2 is affected by the transparent reflective thin film layer.
That is, the reference light incident from the other surface of the hologram forming layer on the hologram sheet having the hologram relief formed on one surface of the hologram forming layer is transmitted through the region of the transparent colored pattern layer A or from other regions. Directly transmits through the hologram forming layer, reflects on the hologram relief surface, and simultaneously contains information on the hologram reproduction image, transmits again through the hologram forming layer, and further, in the region of the transparent colored pattern layer A, the transparent colored pattern layer A also passes through A, and returns to the observer side as it is in other regions.

At this time, since the reflected light including the hologram reproduction image includes “information on the phase and amplitude of the object light” as described above, the region of the transparent colored pattern layer A, that is, the “pattern a” A slight “change” is given to the “color” of the area.
On the other hand, the visibility of the colored pattern layer B1 is not affected by the hologram reproduction image described above.
That is, the colored pattern layer B1 is formed so as to fill the hologram relief of the hologram forming layer. Therefore, in the region of “pattern b1” formed by the colored pattern B1, the hologram relief surface (interface) Since the transparent resin (layer) constituting the hologram forming layer and the resin constituting the colored pattern B1 are directly “adhered”, reflection at this interface is suppressed, and light incident on this interface is It simply "transmits" through the interface (means "pass through" without including hologram information).
Therefore, the reference light incident from the other surface of the hologram forming layer on the hologram sheet having the hologram relief formed on one surface of the hologram forming layer is transmitted through the hologram forming layer,
In the region of the colored pattern layer B1, that is, the region of “pattern b1”, the hologram relief surface (interface) is transmitted (through) and incident on the colored pattern layer B1, and is transmitted through the colored pattern layer B1 and transparently reflected. Reaches the conductive thin film layer.
And in the area | regions other than the area | region of coloring pattern layer B1, the reference light will reach | attain a transparent reflective thin film layer directly.
Here, the surface of the colored pattern layer B1 opposite to the surface in contact with the hologram relief is a “flat surface”, and the transparent reflective thin film layer follows the “flat surface”. Since it is bonded, “light reflection” in this region becomes “light reflected light (close to regular reflection light)” by the transparent reflective thin film layer.
This reflected light does not have information on the hologram reproduction image, proceeds in the reflection direction using the “shape of pattern b1” as the information, and “transmits” again through the colored pattern layer B1 and the hologram forming layer, so that the observation side Therefore, the “pattern b1” is clearly visible in the “color” on the observation side.
That is, in the region of “pattern b1”, the hologram reproduction image is not visually recognized, and the formed “color” itself can be confirmed.

However, the visibility of the colored pattern layer B2 is greatly influenced by factors different from the situation of the transparent colored pattern layer A and the colored pattern layer B1 described above.
That is, the reference light incident from the other surface of the hologram forming layer is transmitted through the hologram forming layer, and part or most of the reference light is reflected by the transparent reflective thin film layer, and the remaining most or part of the reference light is reflected. Through the transparent reflective thin film layer, it reaches the colored pattern layer B2.
In addition, the light reflected by the transparent reflective thin film layer includes a hologram reproduction image, and is divided into a regular reflection light and a hologram reproduction image, but neither of the reflection lights (because it does not pass through the colored layer). ) Not "colored" (strictly, it will be slightly colored by the multiple reflection phenomenon of light in the transparent reflective thin film layer).
Most or part of the transmitted light is reflected by the colored pattern layer B2 and again passes through the transparent reflective thin film layer (partly diffracted, but the light reflected by the colored pattern layer B2 is scattered. ), The intensity of the diffracted light is remarkably reduced.) Since the light passes through the hologram forming layer and returns to the observation side, the “pattern b2” is visually recognized in the “color” on the observation side. It becomes.
That is, in this “pattern b2” region, a hologram reproduction image not including the “color” is visually recognized, and the “color” whose intensity is weakened by the transparent reflective thin film layer is confirmed.
Such “difference in visibility” (the “appearance” of each pattern of “pattern a”, “pattern b1” and “pattern b2” is recognized as “different” on the basis of “color difference”. The "pattern a" of the transparent colored pattern layer A, the "pattern b1" of the colored pattern B1, and the "pattern b2" of the colored pattern layer B2 have the same color. Since it is formed so as to constitute one pattern C ”, at the observation angle other than the direction in which the light of the hologram reproduction image travels, due to the identity of this“ color ”, the hologram sheet of the present invention is simply , “One pattern C having one color” is observed to be formed.
However, when observed in the direction (angle) in which the hologram reproduction image appears, the “pattern b1” that does not change the “color” at all and the “pattern a” that slightly changes the “color” are slight. However, a “color difference” that can be reliably discriminated is generated between “pattern b2” behind the hologram reproduction image and causing a change different from “pattern a”, and “pattern C” is a single “one”. It will be understood that it is composed of three types of “patterns” instead of “one pattern”.
This “difference in visibility” is recognized as one pattern being “stable” and visible in a certain color without depending on the observation angle, and the other two patterns changing the observation angle. Sometimes (by rotating the hologram sheet in the plane of the sheet, for example, the reproduction direction of the hologram reproduction image can be changed and the observation angle can be changed relatively). In other words, it means to be recognized as “two unstable” things.
The “color difference” here is, for example, ΔE {= (Δa ² + Δb ² + ΔL ² ) ^1/2 )} in the L * a * b * chromaticity diagram (LAB color system). The “color difference” represented by “same color” means that the “color difference” is 0.5 or less.
Color systems proposed by the International Commission on Illumination (CIE) include other RGB systems, XYZ systems (Yxy systems), UVW systems (Luv systems), etc., but these are correlated and can be converted easily. And the conversion value can also be used.
The change in “color” is recognized as “difference” when ΔE exceeds 0.5 (SLIGHT: the difference is felt slightly), and clearly exceeds “1.5” when ΔE exceeds 1.5. “Difference” can be visually recognized (NOTICEABLE: the difference is felt considerably).

The general environment for observing the hologram sheet of the present invention is an environment in which an article or the like to which the hologram sheet is applied is used in the various applications described above. Or when it is applied to a device installed at home, it becomes the home environment.
In an outdoor environment, sunlight or light reflected by a building or the like becomes incident light. In an indoor environment, a department store, a shopping mall, or a fluorescent lamp that is used for general household illumination. Becomes a light source, and the light emitted from the fluorescent lamp or the like becomes incident light (meaning that it works as reference light). Therefore, the incident angle is plural and various, and the large number of incident light The hologram reproduction image corresponding to each expresses.
Accordingly, the areas of the “pattern a” of the transparent colored pattern layer A and the “pattern b2” of the colored pattern layer B2 each have their “color” at an angle at which the corresponding hologram reproduction images appear. On the other hand, the “pattern b1” region of the colored pattern layer B1 always exhibits one “color”.
Thus, the fact that “pattern b1” exhibits a “constant” color means that “pattern a” and “pattern b2” whose colors slightly change with “color” as a reference are “contrast”. This "contrast" realizes reliable authenticity determination.

The transparent colored pattern layer A shall be transparent and slightly transmit the reflected light that expresses the hologram reproduction image (the hologram reproduction efficiency of the hologram reproduction image after transmission is expressed by the diffraction efficiency in terms of diffraction grating). 1 to 5%)), and the colored pattern layer B1 and the colored pattern layer B2 are highly concealed, and the density of the “color” of the colored pattern layer B2 (that is, When the saturation is increased, the above-mentioned “difference in visibility” can be made “difficult to recognize” only by glancing at the hologram sheet, and there is a slight “difference in visibility”. Only those who can know (meaning those who have a legitimate right) can read the “difference” and determine the authenticity.
That is, when observed from the direction in which the hologram reproduction image is not developed, each of the “pattern a” and “pattern b1” receives reflected light from the transparent reflective thin film layer behind it and Observed as the same “color” given uniform brightness, and “pattern b2” receives brightness from the colored pattern layer B2 in the light transmitted through the transparent reflective thin film layer, It will be observed as the same “color”.
In the “pattern a”, this reflected light is “zero-order diffracted light” from the hologram relief surface and the transparent reflective thin film layer formed following the surface, and the reflection angle is “regular reflection”. The angle is the same as “light”. The reflected light in “pattern b1” becomes “flat surface” under the colored pattern layer B1 and “regularly reflected light” from the transparent reflective thin film layer formed following the surface. The reflected light in the “pattern b2” becomes “regular reflected light” from the interface between the transparent reflective thin film layer and the colored pattern layer B2 or from the other surface of the colored pattern layer B2. Thus, the reflected light in the chair area is also reflected at the same angle.
Here, when an additional reflective layer (a metallic reflective layer such as an aluminum thin film 100 nm) is additionally provided on the colored pattern layer B2 or on the transparent reflective thin film layer, each colored layer is visually recognized. There is an effect that stability is stabilized, which is preferable.
Since the intensity of each reflected light is the highest in “pattern b1” (in other regions, a hologram reproduction image appears, the 0th-order diffracted light in other regions is ± 1st order from the incident light intensity. -The intensity obtained by subtracting the intensity of the light of the higher-order diffracted light.), Reducing the light transmittance of the colored pattern layer B1 from the light transmittance of the transparent colored pattern layer A (such as increasing the thickness of the layer) It means that it is concealed by the method.), And the visibility needs to be the same. (It is needless to say that “the same visibility” here means that “the same color” is obtained when the reflected light is optically measured by a color difference meter or the like).
Further, although the reflected light of “pattern b2” has brightness, the “color” component is included in a part of the reflected light, so that the saturation of the colored pattern layer B2 is increased and visually recognized. Same sex.
For example, when the ratio of the reflected light of “pattern b1” and the reflected light of “pattern a” is 1.5 / 1, the same transparent resin and the same colored resin are used for the colored pattern layer B1 and the transparent colored pattern layer A. A dye or pigment is used and the thickness ratio is 1.5 / 1.
Alternatively, it is also preferable to add transparent fine particles such as silicon resin having an effect of scattering the transmitted light to the colored pattern layer B1 because the adjustment becomes easy.
When the transmittance of the transparent reflective thin film layer is 80% and the reflectance is 20%, the ratio of the “regular reflected light” including the “color” of the colored pattern layer B2 is 64 / (64 + 20) = 76 (%) (the intensity of light becomes 64% when reciprocating through the 80% light-transmitting layer), so that the concentration is 1.2 times (100/76 = 1.2), that is, Adjust by increasing the proportion of pigment or dye.

Further, when the transparency of the transparent colored pattern layer A is increased (meaning that the hologram reproduction efficiency of the hologram reproduction image after passing through the colored layer is expressed as diffraction efficiency in terms of diffraction grating and is 10 to 30%. ) The contrast (brightness difference) between the “pattern a” area of the transparent colored pattern layer A and the peripheral area of the transparent coloring pattern layer A becomes smaller at the angle at which the hologram reproduction image appears, as if “pattern a”. Therefore, it is also suitable to improve the anti-counterfeiting property by mixing the “disappearing” portion.
Here, the diffraction efficiency uses a semiconductor laser (for example, Kiko Giken MLX standard collimated laser: voltage DC 4.8 to 6.5 V, beam diameter expansion 6 mm during parallel light) as a light source, and the reflected light intensity with respect to the incident light intensity. It can be obtained as a percentage (%).
If the transparent coloring pattern layer A and the coloring pattern layer B1 are both highly transparent, the total reflection light becomes strong in “pattern a”, and the hologram relief zero next time in “pattern b1”. The folded light is strongly reflected as specularly reflected light (that is, light traveling at the same angle as the total reflected light), and both become bright areas, and the difference in visibility is slightly reduced. Can be.
These effects are obtained when both the transparent colored pattern layer A and the colored pattern layer B1 are highly transparent, and the transparent reflective thin film layer itself has a high light reflectance (visible light that becomes illumination light). The light reflectance is 70% or more.).
On the contrary, when the transparent colored pattern layer A is transparent and slightly transmits reflected light that expresses a hologram reproduction image, and the colored pattern layer B1 is highly concealed, the reflective layer thin film This is conspicuous when the light reflectance of the layer itself is low (when the reflectance of visible light serving as illumination light is 30% or less).

As described above, the formation shape of the upper and lower surfaces of the transparent colored pattern layer A and the lower surface of the colored pattern layer B1 does not have a scattering property with respect to transmitted or reflected light, and is a hologram forming layer. It is necessary to use a “flat surface” parallel to the other surface (meaning a mirror surface). Stainless screen printing method, intaglio method, resist processing method, and coloring layer transfer method As the ink used, a transparent resin is mixed with a dye having high solubility in the resin, or a pigment having a small particle diameter is mixed into the transparent resin so that the pigment does not agglomerate, It is preferable to use a material in which the pigment is sufficiently dispersed in the resin using a ball mill, a kneader or the like.
In addition, when using the offset printing method, gravure printing method, silk screen method, it is necessary to realize the above "flat surface" by adjusting the viscosity of the ink at the time of formation and managing the drying conditions. is there.
The thickness of the transparent colored pattern layer A is 2.0 μm to 20 μm, and its flatness is a surface roughness Ra, which is not more than the wavelength of visible light, that is, 0.1 μm to 0.5 μm.
If the thickness of the transparent coloring pattern layer A is less than 2.0 μm, a stable “color” cannot be exhibited, and if it exceeds 20 μm, the cross section becomes visible, which is inconvenient.
Further, if the flatness exceeds 0.5 μm, the light scattering property becomes high, the reflection of light at the interface increases, and between the visibility of the interface and the visibility of the colored pattern layer B However, this is inconvenient because it causes a large difference. Of course, it is preferable that the flatness is less than 0.1 μm, but when it is formed by a printing method, a resist processing method or the like, it is accompanied by physical difficulty.
The hologram relief surface itself reproduces the three-dimensional shape (phase) of the “three-dimensional object” and the reflection intensity (intensity) of the three-dimensional surface to form a hologram reproduction image. Precision is directly linked to the clarity of the hologram to be reproduced.
Due to the redundancy of hologram reproduction, even if a hologram relief disappears (meaning that a portion where light does not travel in the direction in which the hologram reproduction image is formed) is affected, the clarity of the hologram is affected. Although it has no property, it means that unnecessary light components are not added. For example, if the uneven shape is deformed, the phase and intensity of light forming the hologram reproduction image are distorted. Therefore, even if the deformation is slight, the sharpness of the hologram reproduction image is lowered.
Therefore, when a slight oil or other dirt having a thickness of 0.01 μm adheres to the hologram relief surface, or a minute scratch or dent is applied, or even a slight pressure is applied to distort the unevenness, The sharpness is lowered, and the determination of authenticity is unstable.

For this reason, when the colored pattern layer B1 is formed on the hologram relief surface, extreme caution is required, and a method that does not produce any effect on the uneven surface other than the region where the colored pattern layer B1 is provided is used. .
From this, the offset printing method and the gravure method are based on the principle that the plate cylinder is pressed against the uneven surface other than the colored pattern layer B1 formation region, and not only the pressure but also the solvent and the fountain solution are attached. Has a problem.
Therefore, in principle, a stainless screen method, which is a method that works only on the region where the colored pattern layer B1 is provided, or a color that transfers only the colored layer portion using a transfer sheet in which a colored layer is previously formed in a pattern shape. A layer transfer system is preferred.
Of course, when the transparent resin used for the hologram forming layer is made into an ionizing radiation curable type having a high surface strength and sufficiently cured after the hologram relief is formed, and the colored pattern layer B1 is formed, the hologram relief is completely affected. It is also preferable to use a high-purity solvent that does not affect the water or a high-purity water (pure water or the like) that makes it possible to remove excess deposits in the post-treatment.
The thickness of the colored pattern layer B1 is determined in accordance with the thickness of the transparent colored pattern layer A. At least, the hologram relief can be filled, and one surface is a “flat surface”. It is necessary to have a sufficient thickness to be 2.0 μm to 10 μm. The flatness is 0.1 μm to 1.0 μm.
Since the concavo-convex depth of the hologram relief is 0.1 μm to 2.0 μm, its thickness is set to 2.0 μm or more, and to make the step inconspicuous, it is set to 10 μm or less. About flatness, since the surface becomes underconspicuous under colored pattern layer B1, even if it is a little rougher than transparent colored pattern layer A, the visibility is not affected.
Further, the colored pattern layer B2 is greatly influenced by the visible "color" depending on the light transmission / reflectivity of the transparent reflective thin film layer, so that the transparency of the transparent reflective thin film layer is improved, that is, It is preferable to increase the transmittance and reduce the wavelength dependency of transmitted light and reflected light.
And in order to raise the density | concentration of colored pattern layer B2 corresponding to the component of the light reflected by a transparent reflective thin film layer, the mixing ratio of the pigment and dye contained in colored pattern layer B2 is higher than colored pattern layer B1. Increase 10% to 50%.
Further, in order to reduce the difference in the “brightness” of the visible light between the colored pattern layer B1 and the colored pattern layer B2, the diffraction efficiency of the hologram is reduced (the diffraction rating is 1% to 10%). It is preferable to use a pigment or dye having a higher “lightness”.
The colored pattern layer B2 can be formed using the same method as the colored pattern layer B1, and the thickness thereof is determined according to the transparent colored pattern layer A and the visually recognized “color” of the colored pattern layer B1. 2.0 μm to 10 μm.

As “Pattern a”, “Pattern b1”, “Pattern b2”, or “Pattern C” in which they are combined, characters, figures, symbols, and combinations thereof can be used.
In particular, like a “logo” used by brands, manufacturers, etc., those that are separated from each other (meaning that they are not in contact with each other) and composed of a plurality of characters are suitable. The transparent colored pattern layer A, the colored pattern layer B1, and the colored pattern layer B2 may be changed as a repeated pattern, or only “one character” of a plurality of characters is used as the colored pattern layer B1, and another “one character” is colored. As the pattern layer B2, all the remaining characters may be the transparent colored pattern layer A.
This is because the change of “visibility” occurs only in a part of “one character” (transparent colored pattern layer A and colored pattern layer B2), and other parts do not change (colored pattern layer B1). In such a case, the person who determines the authenticity must determine whether the change is “intended to prevent counterfeiting” or “simple printing unevenness”. This is because the reliability of the determination is ensured by determining whether the entire “one character” is “uniformly changed” or “not uniformly changed”.
Further, a transparent colored pattern layer A (“pattern a”), a colored pattern layer B1 (“pattern b1”), or a colored pattern layer B2 (“pattern b2”) is formed in contact with each other, “Pattern C” makes it possible to compare the two areas on the boundary line within the “pattern C”, and easily recognize that there is some difference between the two areas. It becomes a factor.
In addition, when the transparent colored pattern layer A, the colored pattern layer B1 or the colored pattern layer B2 partially overlaps in the boundary line area, the boundary line area exhibits another “color” and prevents forgery. Will greatly reduce the performance.
Further, the size of the area occupied by the transparent colored pattern layer A (“pattern a”), the colored pattern layer B1 (“pattern b1”), or the colored pattern layer B2 (“pattern b2”) (a continuously formed area) As for the above-mentioned “logo” and the like (for example, the line width of the logo representing the line is 2 mm) is sufficient, but the effects of the respective layers described above can be sufficiently obtained. For this purpose, it is necessary to have a line width of at least 100 μm.
This line width means, for example, “the width of one of the lines representing characters”, and if it is less than 100 μm, it is buried in the reflected light from the transparent reflective thin film layer. It becomes difficult to interpret the change in color.

In order to form the hologram forming layer, it is possible to directly form the hologram by performing interference exposure of the hologram on a photosensitive resin material having transparency, which corresponds to the transparent resin layer, or developing it in advance. Using the replica or their plating mold as a replica mold, the mold surface is pressed against the transparent resin layer made of the above resin material, or molding is performed, or injection molding or extrusion molding is performed. It is also preferable to use the mold as the above-mentioned replication mold and to form it simultaneously with the molding.
As the hologram, a rainbow hologram or the like can be used. However, a diffraction grating pattern having the same design as that of “pattern C” can be used, and the visibility of “pattern a”, “pattern b1”, and “pattern b2” can be changed. The concealment property of “difference” (meaning to conceal “difference”) can be improved, and the anti-counterfeiting property can be further improved.
In this rainbow hologram and diffraction grating pattern, the reproduction direction (diffraction direction) with respect to the light from one light source differs depending on the wavelength component of “light”, and is reproduced at a relatively wide angle instead of one angle. Since an image appears (diffracted light travels), changes in “pattern a” and “pattern b2” can be visually recognized stably, which is preferable.
The colored pattern layer B1 and the transparent colored pattern layer A are formed as described above on the one surface (hologram relief forming surface) and the other surface, respectively, and further on the colored pattern layer B1 and the colored pattern. A transparent reflective thin film layer can be formed on the region where the layer B1 is not formed and the hologram relief surface is exposed so as to follow the surface shape.
As the transparent reflective thin film layer, a metal oxide thin film such as TiOx, or a metal nitride thin film is used, and is formed by a physical formation method such as a vacuum deposition method or a CVD (chemical vapor deposition) method. be able to.
When this transparent reflective thin film layer is formed, a “step” (at a thickness of 10 μm becomes a 10 μm step) present at the end of the colored pattern layer B1 is caused by uneven adhesion of the thin film layer or thin film “Pattern b1” so as not to cause unevenness in the light reflectivity due to the alteration of the material or the like (noticeably) and to produce a “clear difference (visibility difference)” from the step of the transparent colored pattern layer A. Provide contrivances such as providing “gradation” at 5 to 20 μm at the edge (boundary area) of the region and providing the same “gradation” at the end of “pattern a”. Is also suitable for increasing the anti-counterfeiting property.
As a method of applying the “gradation”, the thickness is gradually reduced to 10 μm, 5 μm, and 1 μm, or the steps are reduced stepwise as a halftone dot with a thickness of 1 μm, or A method of making it inconspicuous is preferred.
Then, on the transparent reflective thin film layer, the colored pattern layer B2 is placed on the colored pattern B1 in a region that does not overlap with the transparent colored pattern layer A or the colored pattern layer B1 (meaning that it does not overlap when observed). It is formed using the same method.

When the observer visually recognizes the color of the “pattern a” area, the color of the “pattern b1” area, and the color of the “pattern b2” area, simply “light reflected by the transparent colored pattern layer A” is used. In order to compare with “light that once passes through the hologram forming layer, is reflected by the colored pattern layer B1 or the colored pattern layer B2, and returns again through the hologram forming layer”, the color difference is reduced. Therefore, it is desirable to increase the transparency of the hologram forming layer, and the “haze” as an index indicating the transparency is set to 10% or less. Furthermore, the “haze” is more preferably 1% or less.
In addition to the above comparison, assuming that the concealment property of the colored pattern layer B1 is high, the observer, when viewing the color of the “pattern a” region, “the light incident from the observation side is transparently colored. The light passing through the pattern layer A and the hologram forming layer, reflected by the transparent reflective thin film layer surface, and again returning through the hologram forming layer and the transparent colored pattern layer A is visually recognized.
When visually recognizing the color of the “pattern b1” region, “the light incident from the observation side passes through the hologram forming layer, is reflected by the colored pattern layer B1, and passes again through the hologram forming layer. "Light coming"
At least, since both will be “compared”, it is desirable that the transparency of the transparent colored pattern layer A is high in order to reduce the color difference, and “haze” is an indicator of the transparency. 10% or less. More preferably, the “haze” is set to 1% or less.
Further, assuming that the colored pattern layer B1 has high transparency,
When the observer visually recognizes the color of the “pattern a” region, “the light incident from the observation side passes through the transparent colored pattern layer A and the hologram forming layer and is reflected by the surface of the transparent reflective thin film layer, Again, "light returning through the hologram forming layer and the transparent colored pattern layer A" is visually recognized,
When visually recognizing the color of the “pattern b1” region, the “light incident from the observation side” passes through the hologram forming layer and the colored pattern layer B1 and is reflected by the surface of the transparent reflective thin film layer. “Light returning through the layer B1 and the hologram forming layer”
At least, they will be “compared”.
In any case, the content and formation thickness of the pigment and dye are set according to the state of transmission and reflection of the light.
To keep the “haze” below 10%,
In the hologram forming layer, a transparent resin layer having a “haze” of 10% or less is used for the transparent resin layer serving as the hologram forming layer.
In the transparent colored pattern layer A, a transparent resin having a “haze” of 5% or less is used, or a dye added with 1% to 10% of a dye compatible with the resin is used,
A transparent resin having a “haze” of 2% or less is used, and a finely dispersed organic pigment having good dispersibility or 1% to 5% of a finely divided organic pigment is added to the resin.
Thereby, the visibility of transparent coloring pattern layer A can be made clearer, and the forgery prevention property can further be improved.

Further, as described above, when the colored pattern layer B1 is transparent and is formed so as to fill the hologram relief of the hologram forming layer, the hologram forming layer and the colored pattern layer B1 are formed. When the “light” incident on the hologram sheet passes (transmits) through the interface, it is desirable that the “light” does not receive an unnecessary “phase” change or “intensity” change.
Therefore, the refractive index of the hologram forming layer and the refractive index of the colored pattern layer B1 are the same or the difference in refractive index is 0.1 or less.
When the refractive index difference is “0”, “light” is transmitted so that the “interface” itself does not exist, and even if there is a refractive index difference, the refractive index difference is “0.1 or less”. In this case, an unnecessary “phase” change and “intensity” change with respect to the “light” can be sufficiently suppressed, and the effect of erasing the hologram relief by the colored pattern B1 is made clearer. The anti-counterfeiting property can be further enhanced.
Moreover, it is set as a hologram label by providing a solvent type or aqueous adhesive on the above-mentioned transparent reflective thin film layer or colored pattern layer B2.
Thereby, the application to a to-be-adhered body in various uses can be made easy.
In order to suppress the influence on the colored pattern layer B2 on the transparent reflective thin film layer and the colored pattern layer B1 below the transparent reflective thin film layer as viewed from the side on which the adhesive layer is formed, an aqueous adhesive is used. It is preferable to use it.
Further, a solvent-based or water-based adhesive layer is provided on the transparent reflective thin film layer of the hologram sheet or the colored pattern layer B2, and the transparent colored pattern layer in the region of the transparent colored pattern layer A is provided. In a region that covers A and is not provided with the transparent colored pattern layer A, a transparent substrate that covers a region where the transparent resin layer that is the hologram forming layer is exposed is provided to obtain a hologram transfer sheet.
At this time, as the transparent substrate, a material that can be easily separated from the transparent substrate and the transparent colored pattern layer A or the hologram forming layer is used.
As a result, it can be easily applied to an object imparting anti-counterfeiting properties, and when the transparent substrate is peeled off after application, the remaining layer (transferred layer) is very thin. Can be physically difficult to peel off, and can be made highly anti-counterfeiting.

The formation order of each layer at this time is, for example, providing a transparent colored pattern layer A on a transparent substrate, covering the transparent colored pattern layer A, providing a hologram forming layer, forming a hologram relief, A colored pattern layer B1 is provided thereon, a transparent reflective thin film layer is provided so as to cover them, and a colored pattern layer B2 is provided on the transparent reflective thin film layer, and then the transparent reflective thin film layer or colored The order of providing the adhesive layer on the pattern layer B2 can be adopted.
In this case, it is also preferable to add a “peeling layer” having peelability from the transparent substrate on the transparent substrate.
Further, when provided in this order, since the transparent colored pattern layer A is embedded in the hologram forming layer, the transparent base material is peeled off after being transferred to the object for imparting anti-counterfeiting properties. Since the peeled surface is flush (meaning that the transparent colored pattern layer A does not protrude), the anti-counterfeiting property is further improved.
When the hologram sheet of the present invention is observed under a fluorescent lamp, the “pattern a” that is the region of the transparent colored pattern layer A is also the “pattern” that is the region of the colored pattern layer B1 in the direction in which the hologram reproduction image does not appear. “b1” and “pattern b2” which is the region of the colored pattern layer B2 looked the same “color” and were recognized as “one pattern C” composed of one “color”.
When this hologram sheet is rotated by a predetermined angle within the hologram sheet plane and the viewing direction is slightly changed to a predetermined direction, a hologram reproduction image appears, and “pattern a” and “pattern” Different changes were made in the “color” of “b2”, and their authenticity could be easily confirmed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
It is sectional drawing of the hologram sheet H which shows one Example of this invention. It is sectional drawing of the hologram label H 'which shows another Example of this invention. It is sectional drawing of the hologram transfer sheet H '' which shows another Example of this invention.

(Hologram forming layer with hologram relief on one side of transparent resin layer)
As the resin material used for the transparent resin layer for constituting the hologram forming layer 1 of the hologram sheet H of the present invention, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. Thermoplastic resins include acrylic ester resins, acrylamide resins, nitrocellulose resins, or polystyrene resins. Thermosetting resins include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, and epoxy-modified unsaturated resins. A polyester resin, an alkyd resin, a phenol resin, etc. are mentioned. (See Figure 1)
These thermoplastic resins and thermosetting resins can be used alone or in combination of two or more. One or more of these resins may be cross-linked using various isocyanate resins, or various curing catalysts, for example, metal soap such as cobalt naphthenate or zinc naphthenate may be blended. Or peroxide such as benzoyl peroxide and methyl ethyl ketone peroxide for initiating polymerization with heat or ultraviolet light, benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, or diphenyl sulfide good.
Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, acrylic-modified polyester, etc., for the purpose of introducing a crosslinked structure into such an ionizing radiation curable resin or adjusting the viscosity, A monofunctional monomer, a polyfunctional monomer, or an oligomer may be blended and used.
In order to form the hologram forming layer 1 using the above resin material, it can be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram. Using a replica or a plating mold thereof as a replica mold, the mold surface is pressed by pressing the above resin material against a transparent resin layer created by press molding, injection molding, blow molding, etc. Then, two hologram relief surfaces are formed. (See Figure 1)

When thermosetting resin or ionizing radiation curable resin is used, curing is performed by heating or ionizing radiation irradiation while keeping the uncured resin in close contact with the mold surface, and then cured by peeling after curing. Relief hologram fine irregularities can be formed on one side of the transparent resin layer, and these fine irregularities become the hologram relief 2. Note that a diffraction grating forming layer having a diffraction grating formed into a pattern by a similar method can also be used as the light diffraction structure (that is, the hologram relief 2 of the hologram forming layer 1).
The hologram is a recording of interference fringes due to the interference between the object beam and the reference beam in an uneven relief shape, for example, a laser reproduction hologram such as a Fresnel hologram, and a white light reproduction hologram such as a rainbow hologram, There are color holograms, computer generated holograms (CGH), holographic diffraction gratings, and the like using these principles. Further, like a machine readable hologram, the reproduction light may be converted into data by a light receiving unit and transmitted as predetermined information, or authenticity determination may be performed.
In order to precisely create fine irregularities (that is, hologram relief 2), not only optical methods but also electron beam lithography systems are used to create precisely designed relief structures for more precise and complex reproduction. It may create light. The relief shape is designed to have a pitch, depth, or specific periodic shape of the unevenness according to the wavelength (range) of the light or light source for reproducing or reproducing the hologram, the direction and the intensity of reproduction or reproduction. The pitch (period) of the unevenness depends on the reproduction or reproduction angle, but is usually 0.1 μm to several μm, and the depth of the unevenness is a factor that greatly affects the reproduction or reproduction intensity, but is usually 0.1 μm ~ 2 μm.

As in the case of a single diffraction grating, when the unevenness of exactly the same shape is repeated, as the adjacent unevenness is the same shape, the degree of interference of reflected light increases and the intensity increases, and the maximum value is reached. Converge. Diffraction in the diffraction direction is also minimized. When a single point of an image converges to a focal point, such as a stereoscopic image, the convergence accuracy to the focal point is improved, and a reproduced or reproduced image becomes clear.
Further, the transparent reflective thin film layer 5 has a higher reproducibility or reproduction strength as the upper and lower surfaces of the thin film have the same relief shape and the distance between the surfaces (that is, the film thickness) is more uniform. growing. In addition, if there are irregularities having a period and shape different from the irregularities of the hologram image on the relief surface, this becomes noise during reproduction or reproduction of the hologram or diffraction grating, which causes the image to become unclear.
The relief shape is shaped (also referred to as replication) by using an original plate on which diffraction gratings and interference fringes are recorded in a concavo-convex shape as a press die (referred to as a stamper) on the hologram forming layer 1 or described below. The concavo-convex pattern of the original plate can be replicated by superimposing the original plate on the transparent reflective thin film layer 5 and heat-pressing the original plate with an appropriate means such as a heating roll. The hologram pattern to be formed may be single or plural.
In order to accurately reproduce the above-mentioned extremely fine shape and to minimize distortion and deformation such as heat shrinkage after replication, the original plate is made of metal and replicated at low temperature and high pressure.
For the original plate, a metal having high hardness such as Ni is used. After a Cr or Ni thin film is formed on the surface of a glass master or the like formed by optical photography or electron beam drawing by vacuum deposition or sputtering, Ni or the like is electrodeposited (electroplating, electroless plating, Furthermore, after forming 50-1000 micrometers by composite plating etc., it can make by peeling a metal.
In order to use it for high-pressure rotation type replication, it is necessary to increase the thickness accuracy of this Ni layer, and it is usually ± 10 μm, preferably ± 1 μm. For this reason, you may use the back surface grinding | polishing or the planarization method.
Since the replication method is a high pressure, a rotary method is used instead of a flat plate method, and the linear pressure is 0.1 ton / m to 10 ton / m, preferably 5 ton / m or more. If the diameter of the duplication cylinder is small, the reproducibility of the relief is lowered. Therefore, it is preferable that the duplication cylinder diameter is large. Usually, an arc having a diameter of 0.1 m to 2.0 m, preferably 1.0 m or more is used. To do.
The hologram forming layer 1 is pressed along the duplicating cylinder, and duplication is performed from the back side by the metal cylinder at the above pressure. In order to minimize distortion and deformation such as heat shrinkage after replication, a method of heating only a part of the hologram forming layer 1 on the side of the hologram relief 2 rather than heating the entire hologram forming layer 1 is available. desirable. Usually it is heated to 60 ° C to 110 ° C. Furthermore, the precision can be further improved by keeping the metal cylinder on the back surface at room temperature or cooling it.
Moreover, the haze of the hologram forming layer 1 can be made 10% or less by selecting and using a transparent material having a haze of 10% or less from the resin materials used for the transparent resin layer.

(Transparent colored pattern layer A or colored pattern layer B1)
In the hologram sheet H of the present invention, a “transparent colored pattern layer A” 3 is formed on the other surface of the transparent resin layer of the hologram forming layer 1 provided with the hologram relief 2 on one surface of the transparent resin layer, The “colored pattern layer B1” 4 is formed so as to fill the hologram relief 2. (See Figure 1)
As a pigment used for "transparent coloring pattern layer A" 3,
Organic pigments such as quinacridone red / magenta, anthraquinone red / yellow, polyazo yellow, benzimidazolone yellow / orange, phthalocyanine pigments such as copper phthalocyanine blue (α-type, β-type), copper phthalocyanine green, different types Metallic phthalocyanine blue, selenium blue, azo pigments, soluble azo pigments (carmine 6B, permanent red 2B, etc.), insoluble azo pigments (disazo, monoazo, etc.), insoluble polycyclic pigments (red: quinacridone, perylene, Diketopyrrolopyrrole, orange: perinone, perylene, diketopyrrolopyrrole, yellow: quinophthalone, isoindolinone, green: phthalocyanine, blue: phthalocyanine, indanthrene, purple: dioxazine, etc., insoluble lake pigment (red: lake red) C, Wo Chun Red and others).
In particular, insoluble azo pigments, insoluble polycyclic pigments, and insoluble lake pigments are suitable because they have strong coloring power, a clear hue, and high transparency.
Inorganic pigments include complex oxide pigments, fine particle complex oxide pigments, bitumen, hybrid pigments, etc. In addition, petals, molybdenum red, cadmium red, red lead (above, red), yellow lead. (Red mouth), molybdenum orange (orange), cadmium orange (orange), ultramarine blue, ultramarine blue, Prussian blue, cobalt blue, cerulean, manganese blue (above, blue), amber (brown), yellow Lead, cadmium yellow, titanium yellow, yellow iron oxide (above, yellow), chromium oxide, cobalt green, viridian, peacock (above, green), Mars purple, cobalt violet, manganese violet (above, purple.), Etc. An extender pigment, a metal powder pigment, etc. are used.

The particle diameter of the pigment is 0.01 to 0.1 μm (fine particle pigment) in order to ensure the transparency of the “transparent colored pattern layer A” 3. However, those having this particle size are liable to agglomerate and need to be redispersed. The amount to be added is determined by the balance with the thickness to be formed in the forming method to be used, but usually 1% to 20% is preferably added, and it is dissolved in an appropriate solvent or water to form a thickness of 2 to 20 μm.
As for the formation method, since the flatness of the “transparent coloring pattern layer A” 3 is 0.1 μm to 0.5 μm in terms of surface roughness Ra, the stainless screen printing method, the intaglio method, the resist processing method, and further the coloring A layer transfer system is preferred.
Further, in order to suppress the “haze” of the “transparent coloring pattern layer A” 3 to 10% or less, a transparent resin having a “haze” of 2% or less is used. A fine particle organic pigment added at 1% to 5% is used.
Using a solvent system having a low solubility in the hologram forming layer 1, the fine particle pigment is added in an amount of 1% to 5% to an acrylic resin (haze 2% or less), a polycarbonate resin (2% or less), and the like. % To 50%.
At this time, a solvent system having a relatively slow drying rate (boiling point of 100 ° or more, preferably, boiling point of 130 ° or more) is mixed with 10% to 20% of the solvent component. It is also suitable to promote the leveling of the outermost surface of the pattern layer A "3.

Examples of the dye used in the “transparent coloring pattern layer A” 3 include natural dyes and synthetic dyes, such as direct dyes such as Direct Red 2 and Direct Red 28 (Congo Red), acid dyes such as Orange 2, and methylene blue. Basic dyes, cationic dyes, mordant dyes such as alizarin, acidic mordant dyes such as modern black 3, vat dyes such as sulfur dyes, indigo, naphthol dyes, disperse yellow 7, disperse orange 3, disperse thread 17, Disperse dyes such as 1,4-diaminoanthraquinone, reactive dyes such as Reactive Red 1, and the like can be used.
Since these dyes are dissolved in a highly compatible transparent resin, a clear hue and high transparency can be obtained. Therefore, the addition amount is set to 1% to 30%. In addition, when a dye system is used, the “level surface” at the time of formation and surface smoothness are superior to those of a pigment system, so that a “flat surface” can be realized.
The solid content and the forming method are the same as in the pigment system.
Further, in order to suppress the “haze” of the “transparent coloring pattern layer A” 3 to 10% or less, a transparent resin having a “haze” of 5% or less is used, and a dye compatible with the resin is used in an amount of 1% to What added 10% is used.

The resin used for the “transparent colored pattern layer A” 3 is acrylic resin, polyester resin, polyurethane resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, polyamide. Resin having a good adhesiveness with the hologram forming layer 1 and having good dispersibility and compatibility with pigments and dyes can be used.
Furthermore, in addition to these pigments and dyes, in order to adjust the “color”, transparent extender pigments such as calcium carbonate having a particle diameter of 0.1 μm to 1.0 μm, and having light scattering properties while having transparency. High refractive index transparent resin particles such as silicon powder can also be used.
These extender pigments and transparent resin particles have an effect of suppressing the light transmittance of the “transparent colored pattern layer A” 3, and the added amount thereof is set to a solid content ratio of 1% to 10%. If it is less than 1%, the added effect does not appear, and if it exceeds 10%, the leveling property as an ink and the dispersibility are adversely affected.
“Colored pattern layer B1” 4 As the resin, pigment and dye used in the above, those having good adhesion to the transparent reflective thin film layer 5 and the hologram forming layer 1 and dispersibility of the pigment and dye When a material having good compatibility can be used and the same transparency as that of the “transparent colored pattern layer A” 3 is given, the blending is the same as that of the “transparent colored pattern layer A” 3, but the “transparent colored pattern layer A” 3 Unlike pattern layer A "3, when concealing properties are imparted, pigments such as titanium white and lead white that are excellent in concealing properties are used.

In addition, the solvent system and the forming method are selected so that the shape and properties of the surface of the hologram relief 2 of the hologram forming layer 1 are not affected during the formation. In particular, in the formation process, there is no physical or chemical contact on the hologram relief 2 surface in the region other than the region where the “colored pattern layer B1” 4 is formed (the region of “pattern b1”). The method is desirable.
Further, in the area where the “colored pattern layer B1” 4 is provided, the reflectivity at the interface of the hologram relief 2 (the interface between the hologram forming layer 1 and “colored pattern layer B1” 4) is approximately “ In order to set the refractive index of the transparent resin layer used for the hologram forming layer 1 to be the same as the refractive index of the resin used for the “colored pattern layer B1” 4, The resin used for the “colored pattern layer B1” 4 is selected so as to be 1 or less.
For example, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. As the thermoplastic resins, acrylic ester resins (refractive index n = 1.47), acrylamide resins (n = 1.50), nitrocellulose resin (n = 1.54), vinyl acetate resin (n = 1.47), polystyrene resin (n = 1.60) or the like, Unsaturated polyester resin (n = 1.64), urethane resin (n = 1.60), epoxy-modified acrylic resin (n = 1.55), epoxy-modified unsaturated polyester resin (n = 1.64), alkyd resin (N = 1.54) or phenol resin (n = 1.60).

These thermoplastic resins and thermosetting resins can be used alone or in combination of two or more, and may be crosslinked using various isocyanate resins, or various curing catalysts such as cobalt naphthenate. Or a metal soap such as zinc naphthenate, or a peroxide such as benzoyl peroxide or methyl ethyl ketone peroxide for initiating polymerization with heat or ultraviolet light, benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisiso Butyronitrile or diphenyl sulfide may be blended.
Examples of the ionizing radiation curable resin include epoxy acrylate (n = 1.55), urethane acrylate (n = 1.54), acrylic modified polyester (n = 1.64), and the like. For the purpose of introducing a crosslinked structure into the ionizing radiation curable resin or adjusting the viscosity, a monofunctional monomer, a polyfunctional monomer, an oligomer, or the like may be blended and used.
Furthermore, in consideration of the environment, biodegradable plastics can also be used.
Of course, it is also preferable to use these resins for the “transparent colored pattern layer A” 3 to have high durability and physical properties.

(Transparent reflective thin film layer)
In the hologram sheet H of the present invention, the “colored pattern layer B1” 4 is provided on the hologram relief 2 so as to contact and follow the hologram relief 2 formed on the hologram forming layer 1. The transparent reflective thin film layer 5 is formed so as to be in contact with and follow the “colored pattern layer B1” 4 in the area where the film is present. (See Figure 1)
Since this transparent reflective thin film layer 5 needs to reflect incident light, it is a thin film having a higher refractive index than the hologram forming layer 1 and further “colored pattern layer B1” 4 and having transparency. If there is, it can be used without any particular limitation.
As the transparent reflective thin film layer 5, a metallic glossy reflective layer is partially provided or a transparent reflective layer is provided. In this case, after applying the hologram sheet H to an object for preventing forgery, the hologram sheet An advantage is that an image on an object covered with A can be observed through a hologram.
As a transparent reflective layer, since the optical refractive index is different from that of the hologram forming layer 1 in a substantially colorless and transparent hue, it is possible to visually recognize the glitter of a hologram or the like even though there is no metallic luster, A transparent hologram can be produced.
For example, a thin film having a higher refractive index than that of the hologram forming layer 1, for example, ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂ S ₃ , SiO, SnO ₂ , ITO, etc. Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Ti, Fe, Co, Zn, Ge, Pb. Cd, Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, and other oxides or nitrides, and the like can be exemplified by a mixture of two or more thereof. Also, a general light-reflective metal thin film such as aluminum can be used because it exhibits transparency when the thickness is 20 nm or less.
The transparent metal compound thin film is formed by vapor deposition, sputtering, ion plating, CVD (Chemical Vapor Deposition), etc. so as to have a thickness of about 10 to 2000 nm, preferably 20 to 1000 nm, like the metal thin film. It may be provided by a vacuum thin film method or the like. In particular, the CVD method causes little thermal damage to the hologram forming layer 1. Even if other thin film forming methods are used, if the thin film layer to be formed is made thin, the thermal damage can be reduced. For example, in the case of an aluminum vapor deposition layer, although depending on the formation conditions, approximately 20 nm is a critical point where transparency is lost and total reflection appears. This thickness varies depending on the forming conditions such as the thin film material, the forming method, the metal heating temperature and the degree of vacuum.

In order to partially provide the metallic glossy reflective layer, use aluminum or the like to form a metal thin film layer in the same manner as above after masking in a mesh, or after forming the metal thin film, pattern etching Alternatively, a method of removing the metal thin film can be used.
(Colored pattern layer B2)
As the resin, pigment, and dye used in the “colored pattern layer B2” 6, the same materials as those in the “colored pattern layer B1” can be used. However, the transparent reflective thin film layer 5 and an adhesive described later Those having good adhesion to the layer 7 and the adhesive layer 9 are used.
Further, it is desirable that the transparent reflective thin film layer 5 has no physical or chemical contact at the time of formation.
Furthermore, in order to increase the intensity of the reflected light (including the “color” of “colored pattern layer B2” 6) at the interface between “colored pattern layer B2” 6 and transparent reflective thin film layer 5, “ It is preferable that the difference between the refractive index of the colored pattern layer B2 "6 and the refractive index of the transparent reflective thin film layer 5 be large. This makes it possible to increase the “color” component in the “regular reflected light” when the region of the “colored pattern layer B2” 6 is visually recognized.
Therefore, the difference between the refractive index of the “colored pattern layer B2” 6 and the refractive index of the transparent reflective thin film layer 5 is desirably larger than the refractive index difference between the hologram forming layer 1 and the transparent reflective thin film layer 5. Thus, the interface reflectance between the "colored pattern layer B2" 6 and the transparent reflective thin film layer 5 can be made larger than the interface reflectance between the hologram forming layer 1 and the transparent reflective thin film layer 5, Making “color” adjustment easier.
Then, in order to increase the density of the “colored pattern layer B2” 6 corresponding to the light component reflected by the transparent reflective thin film layer, the mixing ratio of the pigment or dye contained in the “colored pattern layer B2” 6 is: 10% to 50% more than “colored pattern layer B1” 4.
Furthermore, in order to reduce the difference in “brightness” of light visually recognized from the “colored pattern layer B1” 4 and the “colored pattern layer B2” 6, it is preferable to use a pigment or dye having a high “brightness”. It is. It is also preferable to obtain a high “brightness” by using a fluorescent pigment or a fluorescent dye.
The “colored pattern layer B2” 6 can be formed using the same method as the “colored pattern layer B1” 4, and the thickness thereof is “transparent colored pattern layer A” 3 or “colored pattern layer B2” 6 The color is determined in accordance with the “color” visually recognized from 2.0 to 10 μm.

(Adhesive layer)
As the pressure-sensitive adhesive layer 7 used in the hologram label H ′ (see FIG. 2) of the present invention, any conventionally known solvent-based and water-based pressure-sensitive adhesives such as vinyl acetate resin, acrylic resin, and vinyl acetate-acrylic copolymer are used. Examples thereof include polymers, vinyl acetate-vinyl chloride copolymers, ethylene-vinyl acetate copolymers, polyurethane resins, and rubber resins such as natural rubber and chloroprene rubber. In order to make the material composition natural, especially natural latex such as latex mainly composed of natural rubber, modified natural rubber latex, especially natural rubber latex obtained by graft polymerization of natural rubber with styrene, especially methyl methacrylate, etc. You may use what was produced from the raw material.
The coating amount of the pressure-sensitive adhesive layer 7 is generally about 8 to 30 g / m ² (solid content), and is applied and dried by a conventionally known method such as gravure coating, roll coating, comma coating, and the like. Thus, the pressure-sensitive adhesive layer 7 is formed. Further, the adhesive strength of the pressure-sensitive adhesive layer 7 is the peel strength between the transparent reflective thin film layer 5 or “colored pattern B2” 6 and the pressure-sensitive adhesive layer 7, and in the peeling method at 180 ° in accordance with JIS Z0237, 0.1 It is desirable to be in the range of about 1 kg. Of course, even higher peel strengths are suitable for the purposes of the present invention.
The type of adhesive and the coating amount as described above can be selected and used so that the peel strength is within the above range when the adhesive layer 7 is formed on the transparent reflective thin film layer 5. preferable.
The hologram label H ′ of the present invention can be easily applied to an object by applying the pressure applied to the desired position of the object to prevent forgery so that the pressure-sensitive adhesive layer 7 is in contact with the hologram layer H ′.

(Transparent substrate or adhesive layer)
The transparent substrate 8 used in the hologram transfer sheet H ″ (see FIG. 3) of the present invention can be made thin, and the mechanical strength and the hologram transfer sheet H ″ are manufactured. Those having solvent resistance and heat resistance suitable for processing and processing at the time are preferable. Further, those having releasability from hologram forming layer 1 and “transparent colored pattern layer A” 3 (transparent substrate 8 is easy Meaning that it can be peeled off.)
Since it depends on the purpose of use, it is not limited, but a film-like or sheet-like plastic is preferable.
For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. .
It is also preferable that one surface of the transparent substrate 8 is subjected to a surface deactivation treatment such as silicon treatment over the entire surface to suppress the peel strength of the transparent substrate 7 to a desired value.
The thickness of the transparent substrate 8 is usually 5 to 100 μm, but is preferably 12 to 25 μm in view of proper handling as a transfer sheet.

Of course, in consideration of environmental influences, a transparent biodegradable plastic film or sheet can also be used. As a chemical synthesis system, lactone resins: ε-caprolactone, 4-methylcaprolactone, 3, 5, 5 -Trimethylcaprolactone, 3,3,5-trimethylcaprolactone, β-propiolactone, γ-butyrolactone, δ-valerolactone, a homopolymer of enanthlactone or a copolymer of two or more of these monomers, a mixture thereof, polycaprolactone Or, polybutylene succinate resin: polybutylene succinate adipate, a mixture of polybutylene succinate and polycaprolactone, a mixture of polybutylene succinate and polybutylene succinate adipate, polybutylene succinate adipate A polyester resin synthesized from a low molecular weight aliphatic dicarboxylic acid and a low molecular weight aliphatic diol, such as succinic acid and butane Addition of aliphatic isocyanate to a mixture of modified polyvinyl alcohol, aliphatic polyester resin and starch, and low molecular weight aliphatic polyester, such as combinations of diol and ethylene glycol, oxalic acid and neopentyl glycol, butanediol, and ethylene glycol A polymerized product is preferred.
In addition, natural products such as animal natural materials such as gelatin, plant natural materials such as cellulose, etc .: starch fatty acid ester, starch chitonan, cellulose, etc., as microbial production systems such as polyhydroxybutyrate and polyesters: carbon source P based on 3-hydroxypropionic acid, 4-hydroxybutyric acid, γ-butyrolactone (3HB-CO-4HB), propionic acid as carbon source, P based on valeric acid (3HB-CO-3HV), etc. Is preferred.

Moreover, on the transparent base material 8, you may provide the peeling layer (not shown) which has the peelability with the hologram formation layer 1 and the "transparent coloring pattern layer A" 3, and a peeling layer is transparent base. Desirably, the material 8 has a property of peeling off, has excellent adhesion to the hologram forming layer 1 and the “transparent colored pattern layer A” 3, and is excellent in durability. Acrylic resin, polyester resin, polyurethane resin Select from the above. It is also preferable to add silicon resin fine particles having transparency and durability.
Then, an adhesive layer 9 is provided on the transparent reflective thin film layer 5 or “colored pattern B2” 6. (See Figure 3.)
As an adhesive, it is intended to ensure adhesion to an object to prevent counterfeiting, so it has good adhesion to the transparent reflective thin film layer 5 and the like, and adheres firmly to the object that is the adherend. What can be done is preferred. Specific examples include vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, acrylic resins, polyester resins, polyurethane resins, polyamide resins, and rubber-modified products. Appropriately selected from the above can be used, and these can be used alone or in a mixture of two or more, and if necessary, hard resin, plasticizer, and other additives can be added and used. The formation thickness, the formation method, and the like are appropriately selected.
The hologram transfer sheet H ″ of the present invention is overlapped so that the adhesive layer 9 is in contact with the object, heated from the transparent substrate 8 side by 100 ° to 200 °, and 1 g / mm ^{2 to} 100 g / mm ² . By applying pressure to the object and then peeling off only the transparent substrate 8, it can be easily applied to an object for preventing counterfeiting.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.
Example 1
As a transparent resin layer constituting the hologram forming layer 1, a hologram having a high design property (diffraction efficiency: 10%) is formed by forming a 50 μm-thick melamine resin on a sheet by an extrusion molding method and photographing using a laser optical system. The Ni original plate was prepared, and the relief surface of the Ni original plate was aligned with one surface of the hologram forming layer 1 described above, and a rotary relief hologram forming apparatus (original cylinder diameter 1.0 m, original plate surface temperature 100 ° C., applied) The hologram relief 2 was formed on one surface of the hologram forming layer 1 with a pressure cylinder diameter of 0.3 m, water-cooled, a pressure of 2 ton / m, and a replication speed of 10 m / min. (See Figure 1)
On the other surface of the hologram forming layer 1, a “transparent colored pattern layer A” 3 having the following composition was formed using a stainless screen system, and a red character (logo) “BR NDBR ND” having a thickness of 5 μm was formed. .
The size of this character is 5mm x 5mm, and 10 characters including 2 blanks are repeated on the left and right sides (2mm gap in the vertical direction and 3mm gap in the horizontal direction) Was provided). The line width of the characters “BR NDBR ND” was approximately 300 μm. (This design corresponds to “pattern a”.)

The drying conditions were moderate, and the smoothness of the character surface was improved.
・ <Composition for transparent colored pattern layer A>
Melamine resin 30 parts by mass Phthalocyanine dye 10 parts by mass Toluene 30 parts by mass Isopropyl alcohol 2 5 parts by mass Butyl cellsolve 5 parts by mass Further, on the hologram relief 2 surface of this hologram forming layer 1, the “colored pattern layer B1 having the same composition” “4” was formed using a stainless screen method and a red letter (logo) “A” having a thickness of 7 μm.
At this time, this logo “A” is composed of 9 blanks and one letter, and the position of “A” is exactly the left side of “BR NDBR ND” of “logo” of “transparent coloring pattern layer A” 3 It was arranged so as to match the position of the blank. The line width of the letter “A” was also about 300 μm. (This design corresponds to “pattern b1”.)
(See Figure 1)

Further, as the transparent reflective thin film layer 5 is in contact with and follows the hologram relief 2 surface and the “colored pattern layer B 1” 4, a TiOx thin film layer is formed by using an electron beam heating method vacuum deposition machine manufactured by ULVAC. 40 nm is formed, and further, a 7 μm-thick red letter (logo) “A” is formed thereon as a “colored pattern layer B2” 6 having the following composition by using a stainless screen method. No. 1 hologram sheet H was obtained. (See Figure 1)
・ <Composition for transparent colored pattern layer B2>
Melamine resin 30 parts by weight Phthalocyanine dye 15 parts by weight Toluene 25 parts by weight Isopropyl alcohol 2 5 parts by weight Butyl cellosolve 5 parts by weight At this time, this logo “A” consists of 9 blanks and one letter, The position of “A” was arranged so as to coincide with the position of the blank on the right side of (logo) “BR NDBR ND” of “transparent coloring pattern layer A” 3. The line width of the letter “A” was also about 300 μm. (This design corresponds to “pattern b2”.)
When this hologram sheet H is observed from the hologram forming layer 1 side under illumination of an indoor fluorescent lamp, when the hologram sheet H is observed from the front, the red letters “BR NDBR ND” and “A” The red letters of the red light receive the reflected light from the transparent reflective thin film layer 5 from behind, and the “color” of the red letters of “BR NDBR ND” and the “color” of the red letters of “A” are recognized as “identical”. Furthermore, the red letter “A” receives the light transmitted through the transparent reflective thin film layer 5 and is visually recognized as “same” as those, and it is as if the letters are combined to form “red one color”. "One logo" called "BRANDBRAND" was recognized as printed ("Pattern a", "Pattern b1" and "Pattern b2" are the same color, so they are integrated into "Pattern C". "B "RANDBRAND" means visually recognized.)
When the angle at which the hologram sheet H is observed is observed as the direction in which the hologram is reproduced, the characters “BR NDBR ND”, which is the characters of the “transparent colored pattern layer A” 3, appear bright and the “color” changes. Furthermore, a hologram reproduction image is added on the “color” of the character “A”, which is the character of “coloring pattern layer B2” 6, and it appears to be a little shining, and “coloring pattern layer B1” 4 Since the “color” of the character “A” is unchanged, the authenticity of the character can be easily determined.

(Example 2)
As the transparent resin layer constituting the hologram forming layer 1, an acrylic resin (haze 2%) is used, and “transparent colored pattern layer A” 3, “colored pattern layer B 1” 4 and “colored pattern layer B 2” 6 have the following composition: A hologram sheet H of Example 2 was obtained in the same manner as in Example 1 except that the above ink was used. (See Figure 1)
-<Transparent colored pattern layer A and colored pattern layer B1 composition>
Acrylic resin (Haze 2%) 30 parts by weight Reid C fine particle organic pigment 1 part by weight Toluene 30 parts by weight Isopropyl alcohol 3 4 parts by weight Butyl cellosolve 5 parts by weight <Composition for transparent colored pattern layer B2>
Melamine resin 30 parts by weight Reid C fine particle organic pigment 1 part by weight Toluene 40 parts by weight Isopropyl alcohol 2 4 parts by weight Butyl cellosolve 5 parts by weight When this hologram sheet H was evaluated in the same manner as in Example 1, a “transparent colored pattern layer” A favorable evaluation result similar to that of Example 1 was obtained except that the change in “color” (blue) of “A” 3 was more clearly recognized.
Example 3
As the transparent resin layer constituting the hologram forming layer 1, an acrylate resin (refractive index n = 1.47) is used, and the "transparent colored pattern layer A" 3 and the "colored pattern layer B1" 4 have the following ink composition: A hologram sheet H of Example 3 was obtained in the same manner as Example 1 except that was used. (See Figure 1)
・ <Composition for transparent colored pattern layer A and colored pattern layer B1>
Acrylic ester resin (refractive index n = 1.47) 30 parts by mass Phthalocyanine dye 10 parts by mass Toluene 30 parts by mass Isopropyl alcohol 2 5 parts by mass Butyl cellosolve 5 parts by mass As a result of the evaluation, the disappearance effect of the hologram relief 2 in the region of the “colored pattern layer B1” 4 was felt more strongly (meaning that the “color” does not change even when the observation angle is changed). Good evaluation results similar to those of Example 1 were obtained.

Example 4
A hologram sheet H of Example 4 was obtained in the same manner as in Example 3 except that the following composition was used as the “composition for transparent colored pattern layer A and colored pattern layer B1” in Example 3. (See Figure 1)
・ <Composition for transparent colored pattern layer A and colored pattern layer B1>
Epoxy-modified acrylic resin (n = 1.55) 30 parts by mass Phthalocyanine dye 10 parts by mass Toluene 30 parts by mass Isopropyl alcohol 2 5 parts by mass Butyl cellosolve 5 parts by mass This hologram sheet H was evaluated in the same manner as in Example 3. However, except that the disappearance effect of the hologram relief 2 in the region of the “colored pattern layer B1” 4 was felt strongly (meaning that the “color” does not change even if the observation angle is changed). Good evaluation results similar to Example 3 were obtained.

(Example 5)
On the transparent reflective thin film layer 5 or “colored pattern layer B2” 6 of Example 1, an adhesive layer 7 having the following composition was formed to a thickness of 30 μm to obtain a hologram label H ′ of Example 4. (See Figure 2.)
・ <Adhesive composition>
Vinyl acetate-acrylic copolymer 30 parts by mass Toluene 40 parts by mass Vinyl acetate 40 parts by mass The pressure-sensitive adhesive layer 7 of this hologram label H ′ was placed on the surface of the object to be imparted with anti-counterfeiting, and pressure was applied. When the hologram label H ′ was easily attached to the surface of the object and observed from the hologram forming layer 1 side under an indoor fluorescent lamp, the same good evaluation results as in Example 1 were obtained.
Further, through the hologram portion, the hologram reproduction image of the hologram label H ′, the “transparent colored pattern layer A” 3, the “colored pattern layer B1” 4, and the “colored pattern layer B2” 6 behind the “logo” The design of the surface of the object could be visually confirmed, and it was thought that the design was excellent.
(Example 6)
25 μm polyethylene terephthalate is used as the transparent substrate 8, and “transparent coloring pattern layer A” 3 of Example 1 is formed on the one surface by using the same method. A composition having the following composition is formed with a thickness of 10 μm using a gravure coating method so as to cover the surface of the layer A ″ 3, and the “colored pattern layer B1” 4 of Example 1 is similarly formed thereon. It formed so that it might become the arrangement | positioning. (See Figure 3.)
・ <Composition for hologram forming layer>
Melamine resin 30 parts by weight Toluene 40 parts by weight Isopropyl alcohol 10 parts by weight Ethyl acetate 20 parts by weight

Then, in the same manner as in Example 1, the transparent reflective thin film layer 5 and the “colored pattern layer B2” 6 are formed, and the transparent reflective thin film layer 5 or the “colored pattern layer B2” 6 is covered. An adhesive layer 9 having the following composition was formed with a thickness of 10 μm using a gravure coating method, to obtain a hologram transfer sheet H ″ of Example 6. (See Figure 3.)
・ <Adhesive composition>
Acrylic resin 15 parts by weight Vinyl chloride-vinyl acetate copolymer 25 parts by weight Toluene 30 parts by weight Vinyl acetate 30 parts by weight The surface of the adhesive layer 9 of this hologram transfer sheet H ″ is provided with anti-counterfeit properties. Placed in contact with the surface and heated and pressurized at 120 °, 10 g / mm ² from the transparent substrate 8 side, the transparent substrate 8 was peeled off, and a hologram portion (hologram transfer) was formed on the object. The portion from which the transparent substrate 8 was peeled from the configuration of the sheet H ″ was transferred.
The hologram part could no longer be peeled off from the object and obtained the same good evaluation as in Example 1 except that it was thought to have high anti-counterfeiting properties.
Further, through the hologram portion, behind the hologram reproduction image of the hologram transfer sheet H ″ and the “logo” of the “transparent colored pattern layer A” 3, “colored pattern layer B 1” 4, and “colored pattern layer B 2” 6 The surface design of the object could be visually confirmed, and it was thought that the design was excellent.

(Example 7)
A hologram sheet H of Example 7 was obtained in the same manner as in Example 1 except that the “transparent colored pattern layer B2” having the following composition was used.
・ <Composition for transparent colored pattern layer B2>
Melamine resin 30 parts by weight Phthalocyanine dye 10 parts by weight Red fluorescent dye (manufactured by Digro) 3 parts by weight Toluene 28 parts by weight Isopropyl alcohol 2 5 parts by weight Butyl cellosolve 5 parts by weight This hologram sheet H was used in the same manner as in Example 1. As a result of evaluation, the same good evaluation results as in Example 1 were obtained except that “pattern a”, “pattern b1”, and “pattern b2” were visually recognized more integrally.
(Comparative example)
(Comparative Example 1) “Transparent Colored Pattern Layer A” 3, “Colored Pattern Layer B1” 4 and “Colored Pattern Layer B2” 6 were not provided, and the same composition as “Transparent Colored Pattern Layer A” 3 was used. A hologram sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the “BRANDBRAND” “logo” was uniformly formed.
When this hologram sheet was evaluated in the same manner as in Example 1, the “BRANDBRAND” “logo” formed was visually recognizable, and the “BRANDBRAND” “logo” was placed on the hologram sheet. In addition, it was thought that the same thing could be easily created simply by printing and the anti-counterfeiting property was inferior.

H hologram sheet H ′ hologram label H ″ hologram transfer sheet 1 hologram forming layer 2 hologram relief 3 transparent colored pattern layer A
4 Colored pattern layer B1
5 Transparent reflective thin film layer 6 Colored pattern layer B2
7 Adhesive layer 8 Transparent substrate 9 Adhesive layer

Claims (1)

A hologram forming layer provided with a hologram relief on one surface of the transparent resin layer, a transparent colored pattern layer A formed on the other surface of the transparent resin layer, and a colored pattern layer B1 formed so as to fill the hologram relief A hologram sheet comprising: a transparent reflective thin film layer provided in contact with the hologram relief or the colored pattern layer B1, and a colored pattern layer B2 provided on the transparent reflective thin film layer; ,
By making the light transmittance of the colored pattern layer B1 lower than the light transmittance of the transparent colored pattern layer A and making the saturation of the colored pattern layer B2 larger than the saturation of the colored pattern layer B1,
When the hologram sheet is observed from the transparent resin layer side, the transparent colored pattern layer A, the colored pattern layer B1, and the colored pattern layer B2 exhibit the same color and are formed with the color. A hologram sheet characterized by being visually recognized as two patterns C.

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