JP2014126666A - Hologram sheet, hologram label and hologram transfer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hologram sheet, a hologram label and a hologram transfer sheet, having excellent forgery preventiveness, allowing easy determination of authenticity, simplifying a manufacturing process and having a unique hologram effect.SOLUTION: Patterns having slightly different visibility with each other are formed upper and lower sides of a hologram formation layer 1 making up a hologram sheet H, respectively, so that the patterns are recognized as if a single pattern is formed. When determining authenticity, the hologram sheet H having patterns allows easy determination of the authenticity by determining the slight visibility.

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. Thus, the present invention relates to a forgery-preventing hologram sheet, a label, and a transfer sheet that have high anti-counterfeiting properties and can easily determine their authenticity.

  In the present invention, the high-brightness ink reflecting layer is provided so as to follow the “hologram relief provided on the hologram forming layer” or the “colored pattern layer B”. This means that there is an interface in which one surface of the high-brightness ink reflective layer is in direct contact. As described in detail below, the high-brightness ink reflective layer is obtained by dispersing “predetermined metal thin film strips” in “predetermined resin material” (the metal thin film strips are encased in a resin material. In this sense, what is in direct contact with the hologram relief surface at this interface is the resin material.

  Therefore, the “difference between the refractive index of the hologram forming layer and the refractive index of the high-brightness ink reflecting layer” in the present invention is more specifically defined as “the refractive index of the hologram-forming layer and the high-brightness ink reflecting layer It means “difference from the refractive index of a predetermined resin material to be configured”.

  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, chemicals, etc.
(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, 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 applicant of the present invention has applied a hologram with a pattern to a support and a hologram forming layer, a reflective thin film layer, an adhesive layer, and a release sheet as necessary. The “adherent body” having at least one “picture” layer between any of the above-mentioned arbitrary layers, wherein the “picture” and the hologram reproduction image are integrated in harmony, and a label with a hologram with a picture is attached. It is beautiful in harmony with the design, color, and color tone, and is useful as a “hologram sticker”. It also exhibits high anti-counterfeiting properties when it is attached to gold cards such as credit cards and high-end products. A label with a hologram with a picture is provided.

  In particular, when an “image” layer is provided adjacent to (attached to) the reflective thin film layer and an attempt is made to rewrite the “image”, the reflective thin film layer is damaged and the rewritten “image” A device that can easily determine whether or not it exists and can prevent forgery is disclosed (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, it will physically damage the "reflective thin film layer" that is in contact with the "pattern" layer, and physically rewrite only the "pattern" layer. Therefore, it is intended to prevent counterfeiting.

  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 total reflection 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

  In the present invention, two types of colored pattern layers (“printing” layers), one of which transmits the hologram reproduction image and the other of which erases the hologram reproduction image, are provided above and below the hologram formation layer. By virtue of the above, although it is observed as if a single colored pattern is combined with the hologram, depending on a predetermined observation method, the two types can be easily discriminated by visual inspection. Provided are a hologram sheet, a hologram label, and a hologram transfer sheet that are excellent and simple in authenticity determination.

  In addition, by using a high-brightness ink reflective layer as a layer exhibiting reflectivity, the manufacturing process can be simplified and a unique hologram effect can be provided.

To solve the above problem,
The first aspect of the hologram sheet of the present invention is:
Hologram forming layer provided with hologram relief on one surface of transparent resin layer, transparent colored pattern layer A formed on the other surface of the transparent resin layer, and colored pattern layer B formed so as to fill the hologram relief And a hologram sheet composed of a high-brightness ink reflecting layer provided so as to follow the hologram relief or the colored pattern layer B, when the hologram sheet is observed from the transparent resin layer side. The transparent colored pattern layer A and the colored pattern layer B have the same color and are visually recognized as one pattern C formed with the color.

According to the hologram sheet of the first aspect,
Hologram forming layer provided with hologram relief on one surface of transparent resin layer, transparent colored pattern layer A formed on the other surface of the transparent resin layer, and colored pattern layer B formed so as to fill the hologram relief And a hologram sheet composed of a high-brightness ink reflecting layer provided so as to follow the hologram relief or the colored pattern layer B, when the hologram sheet is observed from the transparent resin layer side. The transparent colored pattern layer A and the colored pattern layer B exhibit the same color and can be visually recognized as one pattern C formed with the color. The pattern formed as one pattern is composed of two types of colored patterns with different visibility. In a high forgery prevention property, easy determination of the authenticity, and, strike a unique hologram effect, it is possible to provide a hologram sheet.

The second aspect of the hologram sheet of the present invention is:
The difference between the refractive index of the hologram forming layer and the refractive index of the high-brightness ink reflecting layer is 0.1 or more and 0.3 or less.

According to the hologram sheet of the second aspect,
A hologram sheet according to the first aspect is provided, wherein a difference between a refractive index of the hologram forming layer and a refractive index of the high-brightness ink reflecting layer is 0.1 or more and 0.3 or less. It is possible to provide a hologram sheet with enhanced unique hologram effect.

The third aspect of the hologram sheet of the present invention is:
Both of the haze of the transparent resin layer and the transparent colored pattern layer A are 10% or less.

According to the hologram sheet of the third aspect,
Both of the transparent resin layer and the transparent colored pattern layer A have a haze of 10% or less, and can provide a hologram sheet according to the first or second aspect. It is possible to provide a hologram sheet having a clearer visibility and further improving the anti-counterfeiting property.

The fourth aspect of the hologram sheet of the present invention is:
The colored pattern layer B is transparent, and the refractive index of the hologram forming layer and the refractive index of the colored pattern layer B are the same or the difference in refractive index is 0.1 or less. To do.

According to the hologram sheet of the fourth aspect,
The colored pattern layer B is transparent, and the refractive index of the hologram forming layer and the refractive index of the colored pattern layer B are the same or the difference in refractive index is 0.1 or less. The hologram sheet according to the first to third aspects can be provided, the effect of eliminating the hologram relief by the colored pattern B is made clearer, and the hologram sheet is further improved in forgery prevention be able to.

The hologram label according to the fifth aspect of the present invention is:
An adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheets of the first to fourth aspects.

According to the hologram label of the above aspect,
A hologram label characterized in that an adhesive layer is provided on the high-brightness ink reflective layer of the hologram sheet of the first to fourth aspects, and can be applied to a spotted body. It is possible to provide a hologram label in which the adhesive strength between the high-brightness ink reflecting layer and the pressure-sensitive adhesive layer is increased.

The hologram transfer sheet according to the sixth aspect of the present invention is
An adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheet of the first to fourth aspects, and the transparent substrate is peeled off so as to cover the transparent resin layer and the transparent colored pattern layer A It is characterized by being provided.

According to the hologram transfer sheet of the above aspect,
An adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheet of the first to fourth aspects, and the transparent substrate is peeled off so as to cover the transparent resin layer and the transparent colored pattern layer A It is possible to provide a hologram transfer sheet characterized by being provided, which can be easily applied to an object that imparts anti-counterfeiting properties, and also has high adhesion between the high-brightness ink reflective layer and the adhesive layer. Thus, it is possible to provide a hologram transfer sheet that is physically difficult to peel off after application and can improve its anti-counterfeiting property.

  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, and the irregularities are the same as described above. The depth and period are disturbed, 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 the interference fringes. Arise.

  At the time of creating the hologram, when parallel light in which the object light and the reference light form a predetermined angle is used, the plus and minus first-order diffracted lights when the hologram is illuminated are both parallel lights. 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.

  Further, as in the present invention, when the “reflecting surface” is formed of “a high-brightness ink reflecting layer in which predetermined metal thin film strips are dispersed in a predetermined resin material”, the hologram relief surface and the resin material first Reflection of light occurs at the interface, and the first hologram reproduction image by the first interface can be observed, and the light transmitted through the first interface enters the high-brightness ink reflection layer, and is predetermined. (Refers to the interface between the resin material and the metal thin film strip, that is, the reflection at the second interface), and again passes through the first interface and returns to the observation side. Thus, the second hologram reproduction image can be observed. Moreover, since the second hologram reproduction image forms the same reproduction image in substantially the same direction as the first hologram reproduction image, a unique hologram reproduction image can be observed.

  Due to this mechanism, the hologram reproduction image of the present invention is a “unique hologram reproduction image” which is different from the hologram reproduction image when the reflective metal thin film layer is simply provided on the hologram relief surface. This further enhances anti-counterfeiting properties.

  However, the hologram reproduction image is generated by the interference of individual reflected lights generated from the adjacent concave and convex surfaces of the hologram relief. For this reason, in order to obtain a clear hologram reproduction image, It is required that adjacent uneven surfaces are formed at least over a circular region having a diameter of 30 μm or more. That is, the reflection at the second interface in the mechanism of the present invention occurs at a continuous and uniform interface having a region of at least a diameter of 30 μm or more, and the continuous and uniform reflected light indicates the region range (the cross section of the reflected light). ) Is substantially maintained and is incident on the first interface so that it passes through the adjacent reliefs of the hologram relief within the region at the first interface at the same time. The “predetermined metal thin film strip” is preferably 30 μm or more in diameter.

  Furthermore, in order to increase the reflectance at the first interface, the “difference between the refractive index of the hologram forming layer and the refractive index of the high-brightness ink reflective layer” is 0.1 or more and 0.3 or less. To do.

  When this difference is less than 0.1, the intensity of the reflected light at the first interface becomes small, and the first hologram reproduction image reproduced at this interface becomes unclear. On the other hand, if the difference exceeds 0.3, the amount of light passing through the first interface decreases, the second hologram reproduction image at the second interface becomes unclear, and the anti-counterfeiting property decreases.

  As described above, in the hologram sheet of the present invention, the hologram relief surface formed on one surface of the transparent resin layer is used as the first reflection surface, and the reference light (means illumination light) from the other surface of the transparent resin layer. ), Is transmitted through a “hologram forming layer made of a transparent resin layer” (hereinafter referred to as a hologram forming layer), and is reflected by the hologram relief surface (reflection surface) (including information on a three-dimensional object). However, the first hologram reproduction image is visually recognized by the light transmitted through the hologram forming layer and returning to the reference light incident side, and the first reflecting surface is The second hologram reconstructed image is visually recognized by the light transmitted through and reflected by the surface of the predetermined metal thin film strip in the high-brightness ink reflecting layer, that is, the second interface, and as a result, the two Hologram reproduction image It is those that can be visually recognized to "unique hologram effect".

However, in the detailed description of the functions of “transparent colored pattern layer A” and “colored pattern layer B” described below, these two hologram reproduction images are represented by a simple model in order to avoid complicated description. That is, a description will be given by replacing it with “a model in which one reflective metal thin film layer is provided on the hologram relief surface and one hologram reproduction image is reproduced from the hologram relief surface”. (The first interface, the second interface, and the high-brightness ink reflection layer itself are referred to as a single “reflection layer”, and the reflected light from the plurality of interfaces described above is collectively from one “reflection layer”. (It will be described as one "reflected light" or one "reflected light" from the "high-brightness ink reflective layer".)
Due to this simplification, the hologram sheet of the present invention has the following: “The hologram relief surface formed on one surface of the transparent resin layer is used as a reflection surface, and the reference light (means illumination light) from the other surface of the transparent resin layer. Is transmitted through a “hologram forming layer made of a transparent resin layer” (hereinafter referred to as “hologram forming layer”), and its hologram relief surface (reflection surface, ie, “hologram forming layer” and “reflection layer”). The light reflected by the interface with the light beam ("reflected light". The light containing the information of the three-dimensional object) passes through the hologram forming layer again and returns to the reference light incident side. It can be replaced with a simple description such as “the hologram reproduction image can be visually recognized by the incoming light”.

  In the hologram sheet of the present invention, a transparent colored pattern layer A is formed on the other surface (the surface on which no hologram relief is formed) of the hologram forming layer, and the “pattern” (pattern) represented by the transparent colored pattern layer A 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 B formed so as to fill the hologram relief of the hologram forming layer, and the “pattern” (pattern b) represented by the colored pattern B is the colored pattern layer. It is visually recognized as a “pattern” (pattern b) of “the same color” as B.

  Since the “pattern a” of the transparent coloring pattern layer A and the “pattern b” of the coloring pattern B are formed to constitute “one pattern C having one color”, 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 term “color tone” refers to the shade of color, brightness, darkness, strength, etc., that is, hue, and is a concept that combines “saturation” and “lightness”. Means that.

  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 and the colored pattern layer B are obtained by dispersing and dissolving dyes and pigments in a transparent resin. The types of the dyes and pigments, their dispersibility and solubility, pigment particles The hue, saturation, and brightness are determined by the size, shape, surface condition, other additives, and the forming method, drying and curing conditions during formation, and the thickness and interface conditions. And the "color" will be determined.

  However, when a reflective layer is provided on the back side of the transparent colored pattern layer A or the colored pattern layer B 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.

  As described above, the “same color” in the present invention means the “color” visually recognized.

  Therefore, the “color” visually recognized in the transparent colored pattern layer A is affected by the hologram reproduction image described above.

  That is, the reference light incident on the hologram sheet having the hologram relief formed on one surface of the hologram forming layer from the other surface of the hologram forming layer is transmitted from the region of the transparent colored pattern layer A and the other regions to the hologram forming layer. At the same time as reflected by the hologram relief surface, including information on the reproduced hologram image, again transmitted through the hologram forming layer, and further transmitted through the transparent colored pattern layer A in the transparent colored pattern layer A region. In the other areas, it returns to the observer side as it is.

  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 B is not affected by the hologram reproduction image described above.

  That is, the colored pattern layer B is formed so as to fill the hologram relief of the hologram forming layer, and therefore, in the region of “pattern b” formed by the colored pattern B, at the hologram relief surface (interface), Since the transparent resin constituting the hologram forming layer and the resin constituting the coloring pattern B are directly “adhered”, reflection at this interface is suppressed, and light incident on this interface simply passes through this interface. It will be “transmitted” (meaning that it does not include hologram information and “passes through”).

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 B, that is, in the region of “pattern b”, the hologram relief surface (interface) is transmitted (through) and incident on the colored pattern layer B and transmitted through the colored pattern layer B, or In the region other than the region of the colored pattern layer B, it directly reaches the reflective thin film.

  The surface of the colored pattern layer B opposite to the surface in contact with the hologram relief is a “flat surface”, and the high-brightness ink reflective layer adheres following this “flat surface”. Therefore, “reflection of light” in this region becomes “total light reflection of light” by the high-brightness ink reflection layer.

  This totally reflected light does not have information on the hologram reproduction image, proceeds in the reflection direction using the “pattern b shape” as the information, and “transmits” again through the colored pattern layer B and the hologram forming layer to observe it. Therefore, the “pattern b” is clearly visible in the “color” on the observation side.

  That is, in the region of “pattern b”, the hologram reproduction image is not visually recognized, and the formed “color” itself can be confirmed.

  This “difference in visibility” (meaning that the “appearance” of each pattern of “pattern a” and “pattern b” is recognized as “different” on the basis of “color difference”. The “pattern a” of the transparent colored pattern layer A and the “pattern b” of the colored pattern B are formed so as to constitute “one pattern C having the same color”. At the observation angle other than the direction in which the light of the hologram reproduction image travels, this “color” identity simply forms “one pattern C having one color” on the hologram sheet of the present invention. Observed as is.

  However, when observed in the direction (angle) in which the hologram reproduction image appears, the “pattern b” that does not change the “color” at all and the “pattern a” that slightly changes the “color” A distinguishable “color difference” occurs, and it is interpreted that “pattern C” is composed of two types of “patterns” instead of a single “one pattern”.

  This "difference in visibility" is recognized when one pattern is recognized as being "stable" and visible in a certain color, regardless of the observation angle, and the other pattern changes the observation angle. (By rotating the hologram sheet in the plane of the sheet or the like, the reproduction direction of the hologram reproduction image can be changed and the observation angle can be changed relatively.) The “color” is so-called “unstable”. It means being recognized as a thing.

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).

  In the first place, the general environment for observing the hologram sheet of the present invention is an environment where an article or the like to which the hologram sheet is applied is used in the various uses described above, and when worn or carried, it is outdoors. It is an environment, or an indoor environment such as a department store or a shopping mall outside the home, and when it is applied to a device installed in a 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 light emitted from the fluorescent lamp or the like becomes incident light. Therefore, the angles are plural and various, and a hologram reproduction image corresponding to each of them is expressed by the large number of incident light.

  Therefore, the “pattern a” of the transparent colored pattern layer A changes its “color” each time at an angle at which the corresponding hologram reproduction images appear, while the colored pattern layer B The area of “pattern b” always exhibits one “color”.

  Thus, the fact that “pattern b” exhibits a “constant” color makes it possible to “contrast” “pattern a” whose color slightly changes with reference to this “color”. By contrast, reliable authenticity determination is realized.

  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). If the colored pattern layer B is highly concealed, it is difficult to recognize the above-mentioned “difference in visibility” by just looking at the hologram sheet. Only those who can know that this slight “difference in visibility” exists (meaning a person with a legitimate right) can interpret the “difference” and authenticate it. Can be determined.

  That is, when observed from the direction in which the hologram reproduction image does not appear, both “pattern a” and “pattern b” receive the reflected light from the high-brightness ink reflecting layer behind them, and It will be observed as the same “color” with uniform brightness.

  In the “pattern a”, the reflected light is “zero-order diffracted light” from the hologram relief surface and the high-brightness ink reflecting layer formed following the surface, and the reflection angle is “regular reflection”. The angle is the same as “light”. Then, the reflected light in the “pattern b” becomes “regular reflected light” from the “flat surface” under the colored pattern layer B and the high-brightness ink reflecting layer formed following the surface.

  Thus, the reflected light in the chair area is also reflected at the same angle.

Since the intensity of the reflected light is larger in the “pattern b” (the 0th-order diffracted light is an intensity obtained by subtracting the intensity of ± 1st to higher-order diffracted light from the incident light intensity). The light transmittance of the colored pattern layer B is made lower than the light transmittance of the transparent colored pattern layer A (meaning that it is concealed by increasing the thickness of the layer). Are preferably 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).
For example, when the ratio of the reflected light of “pattern b” to 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 B 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 a silicon resin having an effect of scattering the transmitted light to the colored pattern layer B because the adjustment is easy.

  Further, when the transparency of the transparent coloring pattern layer A is high (meaning that the hologram reproduction efficiency of the hologram reproduction image after transmission is expressed as diffraction efficiency in terms of diffraction grating and is 10 to 30%). At the angle at which the hologram reproduction image described above appears, the contrast (brightness difference) between the “pattern a” region of the transparent colored pattern layer A and the peripheral region of the region becomes small, as if “pattern a” disappears. In order to improve the anti-counterfeiting property, it is also preferable to mix such a “disappearing” portion.

  The diffraction efficiency is determined by using 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 ratio of reflected light intensity to incident light intensity. (%).

  If the transparent colored pattern layer A and the colored pattern layer B are both highly transparent, the total reflected light is strong in “pattern a”, and the hologram relief is zero in the “pattern b”. 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 the transparent coloring pattern layer A and the coloring pattern layer B are both highly transparent, when the light reflectance of the high-brightness ink reflecting layer itself is high (visible light that becomes illumination light). The light reflectance is 70% or more.).

  On the contrary, when the transparent colored pattern layer A has transparency and slightly transmits reflected light that expresses a hologram reproduction image, and the colored pattern layer B has high concealing property, 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 shapes of the upper and lower surfaces of the transparent colored pattern layer A and the lower surface of the colored pattern layer B have no scattering property with respect to transmitted or reflected light, and the hologram forming layer Must be 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 are used. As the ink, a transparent resin is mixed with a highly soluble dye, or the transparent resin is mixed. It is preferable to use a pigment in which the pigment is sufficiently dispersed in the resin using a ball mill, a kneader, or the like so that a pigment having a small particle diameter is mixed and the pigment does not agglomerate.

  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 it is less than 2.0 μm, a stable “color” cannot be exhibited, and if it exceeds 20 μm, its cross section becomes visible, which is inconvenient.

  Further, when the flatness exceeds 0.5 μm, the light scattering property is increased, the reflection of light at the interface increases, and the visibility between the interface and the visibility of the colored pattern layer B is between. 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 forming the colored pattern layer B on the hologram relief surface, it is necessary to pay close attention and use a method that does not cause any effect on the uneven surface other than the region where the colored pattern layer B is provided. .

  From this, the offset printing method and the gravure method are based on the principle that the plate cylinder is pressed against the concavo-convex surface other than the colored pattern layer B forming region, and not only the pressure but also the solvent and the fountain solution adhere. Has a problem.

  Therefore, in principle, using a stainless screen method, which is a method that works only on the region where the colored pattern layer B is provided, or a transfer sheet in which a colored layer is formed in advance in a pattern, the coloring layer portion is transferred. A layer transfer system is preferred.

  Of course, when the transparent resin used for the hologram relief is of an ionizing radiation curable type having a high surface strength and is sufficiently cured after the hologram relief is formed, and the colored pattern layer B is formed, the hologram relief is completely affected. It is also preferable to use a high-purity solvent that does not reach or a high-purity water (pure water or the like) so that excess deposits can be removed in post-treatment.

  The thickness of the colored pattern layer B 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 under the coloring pattern layer B and becomes inconspicuous, even if it is a little rougher than the transparent coloring pattern layer A, the visibility is not affected.

  As “Pattern a”, “Pattern b”, and “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 and the colored pattern layer B may be repeatedly changed, or only “one character” of a plurality of characters is used as the colored pattern layer B, and all the remaining characters are used as the transparent colored pattern layer A. May be.

  This is because the change in “visibility” occurs only in a part of “one character” (transparent colored pattern layer A) and the other part does not change (colored pattern layer B). It is difficult for a person who determines authenticity to determine whether the change is “what was intentionally provided to prevent counterfeiting” or “simple printing unevenness”. This is because the reliability of the determination is ensured by determining whether the entire “one character” “changes uniformly” or “does not change uniformly”.

  Further, when the transparent colored pattern layer A (“pattern a”) and the colored pattern layer B (“pattern b”) are formed in contact with each other and the combined pattern is “pattern C”, In addition, the boundary line is generated, and it is possible to compare two areas on the boundary line, and it becomes a factor that makes it easy to notice that there is some difference between the two areas.

  In addition, when the transparent colored pattern layer A and the colored pattern layer B partially overlap in the boundary line area, the boundary line area exhibits another “color”, and the anti-counterfeiting property is greatly reduced. Will be allowed to.

  Further, the size of the area occupied by the transparent colored pattern layer A (“pattern a”) and the colored pattern layer B (“pattern b”) is the size of the above-mentioned “logo” (for example, the line representing the logo) It is sufficient if the line width is 2 mm.) However, in order to sufficiently bring out the effects of the respective layers described above, 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, the line width is buried in the reflected light from the high-brightness ink reflecting 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 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 “pattern C” can be used to conceal the “difference” in visibility between “pattern a” and “pattern b”. 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), the change of “pattern a” can be visually recognized stably, which is preferable.

  The colored pattern layer B and the transparent colored pattern layer A are respectively formed on the one surface (hologram relief forming surface) and the other surface as described above, and further on the colored pattern layer B and the colored pattern. On the region where the layer B is not formed and the hologram relief surface is exposed, a high-brightness ink reflecting layer is formed so as to follow the surface shape.

  For the high-brightness ink reflective layer, after forming a metal thin film on the surface of the substrate having an appropriate peelability by a wet method or a dry method, the metal thin film is rolled using a roll-up method or other appropriate peeling means, Use high-brightness ink in which metal thin film strips formed by a method of breaking the metal thin film to an appropriate size and shape while being peeled from the surface of the base material are dispersed in a predetermined resin material and solvent. be able to.

  When forming this high-brightness ink, the metal thin film strips do not aggregate in the high-brightness ink reflecting layer, and force is applied in the in-plane direction so as to extend in a direction substantially parallel to the surface of the high-brightness ink reflecting layer. Is formed using a printing method such as a multistage offset printing method or a gravure reverse coating method.

  Of course, once a high-brightness ink reflective layer is formed to a predetermined thickness on a substrate with surface smoothness, the surface is roll calendered, and the metal thin film strips in the ink layer are approximately parallel to the substrate surface. Or by repeating this process to form a high-brightness ink reflective layer in a multilayer structure, and to improve the parallelization effect for each layer, and then on the colored pattern layer B by a transfer method. And forming the high-brightness ink reflective layer on the region where the transparent resin base material is exposed without forming the colored pattern layer B so as to follow the surface shape. The brightness ink reflection layer is improved in reflectivity, and a metallic luster comparable to a so-called “metal vapor deposition reflection layer” can be obtained.

  Furthermore, the surface of the metal thin film strip is treated with an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative to improve dispersibility in the high-brightness ink, and the high-brightness ink reflective layer has a high metallic luster. It is also suitable.

  When this high-brightness ink reflective layer is formed, the “steps” existing at the end of the colored pattern layer B (when formed with a thickness of 10 μm, a step of 10 μm) is uneven adhesion of the high-brightness ink reflective layer. "Pattern b" so as not to cause unevenness in the light reflectivity (the difference in level is conspicuous) and a "clear difference (difference in visibility)" from the level difference in the transparent colored pattern layer A. It is possible to devise such as providing “gradation” at 5 μm to 20 μm at the end (boundary region) of the region and providing the same “gradation” at the end of “pattern a”. It 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 halftone dot region having an appropriate size of 1 μm is used to suppress the visibility of the step. Is preferred. Alternatively, as a first step, a high-brightness ink reflection layer is provided only in a region where the colored pattern layer B is not provided, with the thickness of the colored pattern layer B, and as a second step, the same thickness is provided on the colored pattern layer B. It is also preferable to eliminate the above-described step by providing a high-brightness ink reflecting layer.

  In addition, when the observer visually recognizes the color of the “pattern a” region and the color of the “pattern b” region, simply “light reflected by the transparent colored pattern layer A” and “once the hologram forming layer In order to reduce the color difference, the transparency of the hologram forming layer must be high in order to compare “the light that passes through and reflects the colored pattern layer B and then returns again through the hologram forming layer”. It is desirable to set the “haze”, which is an index indicating the transparency, to 10% or less. Furthermore, the “haze” is more preferably 1% or less.

In addition to the above comparison, the observer assumes a case where the concealment property of the colored pattern layer B is high.
When visually recognizing 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, is reflected by the surface of the high-brightness ink reflecting layer, and again forms a hologram. The light returning through the layer and the transparent colored pattern layer A ",
When visually recognizing the color of the “pattern b” region, “the light incident from the observation side passes through the hologram forming layer, is reflected by the colored pattern layer B, and again passes through the hologram forming layer. "Light coming"
Since both are to be “compared”, in order to reduce the color difference, it is desirable that the transparent colored pattern layer A has a high transparency, and “haze”, which is an indicator of the transparency, is 10 % Or less. More preferably, the “haze” is set to 1% or less.

Further, assuming that the colored pattern layer B 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 high-brightness ink reflecting 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 b” region, “light incident from the observation side” passes through the hologram forming layer and the colored pattern layer B, is reflected by the surface of the high-brightness ink reflecting layer, and is again colored. `` Light returning through layer B and the hologram forming layer ''
The two 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 B 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 B 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 B 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 B is made clearer. The anti-counterfeiting property can be further enhanced.

  Moreover, a hologram label is obtained by providing a solvent-based or water-based adhesive on the above-described high-brightness ink reflecting layer.

  Thereby, application to a spotted body in various applications can be facilitated.

  In order to suppress the influence on the colored pattern layer B under the high-brightness ink reflecting layer, it is preferable to use a water-based adhesive.

  Further, a solvent-based or water-based adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheet described above, and in the region of the transparent coloring pattern layer A, the transparent coloring pattern layer A is covered and transparent coloring is performed. In the area where the pattern layer A is not provided, a transparent base material is provided to cover the area where the transparent resin layer that is the hologram forming layer is exposed, and a hologram transfer sheet is obtained.

  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 is very thin. Can be difficult, and can be 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, On top of that, after the colored pattern layer B is provided and the high-brightness ink reflective layer is provided so as to cover them, the adhesive layer may be provided on the high-brightness ink reflective layer.

  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 B in the direction in which the hologram reproduction image does not appear. “b” also appears as the same “color” and can be recognized as “one pattern C” composed of one “color”.

  When this hologram sheet is rotated by a predetermined angle within the hologram sheet surface and the viewing direction is slightly changed to the predetermined direction, the hologram reproduction image appears and only “pattern a” becomes “color”. A change occurred and its authenticity could be easily confirmed.

  Moreover, the same effect was able to be confirmed in the state which affixed the coloring label of this invention to the appropriate to-be-adhered body.

  Furthermore, the same effect could be confirmed even in the state transferred to an appropriate object using the colored transfer sheet of the present invention.

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 of light 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, in the case of a transparent metal compound thin film, the upper and lower surfaces of the thin film have the same relief shape, and the more uniform the distance between the surfaces (that is, the film thickness), the higher the reproduction or reproduction strength. 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 high-brightness ink reflecting layer 5 and heat-pressing them 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 B)
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, A “colored pattern layer B” 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, petal, molybdenum red, HYPERLINK "http://100.yahoo.co.jp/ detail /% E3% 82% AB% E3% 83% 89% E3% 83% 9F% E3% 82% A6% E3% 83% A0% E3% 83% AC% E3% 83% 83% E3% 83% 89 / "Cadmium Red, HYPERLINK" http://100.yahoo.co.jp/detail/%E9%89%9B%E4%B8%B9/ "Red lead (above red), yellow lead (HYPERLINK" http : //100.yahoo.co.jp/detail/%E8%B5%A4%E5%8F%A3/ "red end), molybdenum orange (orange), cadmium orange (orange), ultramarine blue, bitumen (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 (green), ma Scan purple, cobalt violet, manganese violet (or purple.) Other, extender pigments, metallic powder pigments and the like 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 lens flatness and surface smoothness during formation are superior to that 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 B” 4 The resin, pigment, and dye used in the above are those having good adhesion to the high-brightness ink reflecting 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 “transparent colored pattern layer A” 3 is given, the blending is the same as that of “transparent colored pattern layer A” 3, but “transparent Unlike the colored pattern layer A ”3, when providing concealability, a pigment such as titanium white or lead white having excellent concealability is 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 surface of the hologram relief 2 in the region other than the region for forming the “colored pattern layer B” 4 (region of “pattern b”). The method is desirable.

  Further, in the area where the “colored pattern layer B” 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 B” 4) is substantially “ 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 B” 4, The resin used for the “colored pattern layer B” 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.

(High brightness ink reflective layer)
In the colored sheet H of the present invention, in the region where the transparent resin base material 1 is provided with the “transparent colored pattern layer B” 4 so as to follow and follow the transparent resin base material 1. The high-brightness ink reflecting layer 5 is formed so as to contact and follow the “transparent colored pattern layer B” 4. (See Figure 1)
For the high-brightness ink reflective layer 5, after forming a metal thin film on a substrate surface having appropriate peelability by a wet method or a dry method, the metal thin film is rolled up using a roll-up method or other appropriate peeling means, A high-brightness ink in which metal thin film strips formed by a method of breaking the metal thin film to an appropriate size and shape while being peeled from the surface of the base material are dispersed in a predetermined resin material and solvent, etc. Can be used.

  When forming this high-brightness ink, the metal thin film strips do not aggregate in the high-brightness ink reflecting layer, and force is applied in the in-plane direction so as to extend in a direction substantially parallel to the surface of the high-brightness ink reflecting layer. Is formed using a printing method such as a multistage offset printing method or a gravure reverse coating method.

  Of course, once a high-brightness ink reflective layer is formed to a predetermined thickness on a substrate with surface smoothness, the surface is roll calendered, and the metal thin film strips in the ink layer are approximately parallel to the substrate surface. Or by repeating this process to form a high-brightness ink reflective layer in a multilayer structure, and to improve the parallelization effect for each layer, and then on the colored pattern layer B by a transfer method. And forming the high-brightness ink reflective layer on the region where the transparent resin base material is exposed without forming the colored pattern layer B so as to follow the surface shape. The brightness ink reflection layer is improved in reflectivity, and a metallic luster comparable to a so-called “metal vapor deposition reflection layer” can be obtained.

  Furthermore, the surface of the metal thin film strip is treated with an organic fatty acid, methylsilyl isocyanate or a cellulose derivative to improve dispersibility in the high-brightness ink ink, so that the metallic luster of the high-brightness ink reflecting layer is increased. It is also suitable to do.

  As the metal of the metal thin film strip used for the high-brightness ink reflecting layer 5, aluminum can be applied, but gold, silver, copper, brass, titanium, chromium, nickel, nickel chromium, stainless steel, etc. can be used as necessary. . The thickness of the metal thin film strip is preferably 0.01 to 0.1 μm, more preferably 0.03 to 0.08 μm, and the size of the metal thin film strip dispersed in the high-brightness ink is 5 -50 μm is preferable, and more preferably 30-50 μm. When the size is less than 5 μm, the brightness of the ink coating film becomes insufficient, and when it exceeds 50 μm, the print formation suitability and the coating formation suitability deteriorate. For example, when the gravure coating method is used, it is difficult to enter the cell of the gravure plate, and when the screen printing method is used, the screen plate is likely to be clogged. The metal thin film strips are unevenly distributed, the metal thin film strips are not parallel to the surface, are bent or agglomerated, and the metallic luster of the high-brightness ink reflecting layer 5 is increased. It will drop significantly.

  As the metal thin film strip, for example, a metal vapor deposition film comprising a polyester film substrate / release layer / metal vapor deposition film / antioxidation protective layer on the metal surface is produced. At this time, the release layer and the protective layer are not particularly limited, and for example, cellulose derivatives, acrylic resins, chlorinated polypropylene, and the like can be applied. This metal vapor-deposited film is immersed in an appropriate solvent in which the release layer dissolves, and a metal roll or rubber roll is pressed on the metal vapor-deposited film (the roll rotation speed is slightly faster than the substrate conveyance speed. Alternatively, the metal vapor deposition film is peeled off while breaking the metal vapor deposition film to have an appropriate shape and size, stirred, filtered and dried to obtain a desired thickness, shape, And a metal thin-film strip having a size (the shape and size are distributions relatively close to a normal distribution, so the average shape and size are determined by a sampling method).

  Then, while stirring the metal thin film strip at a temperature of 10 to 35 ° C. for about 30 minutes, an organic fatty acid, methylsilyl isocyanate or cellulose derivative solution is added, and the organic fatty acid, methylsilyl isocyanate or cellulose is added to the surface of the metal thin film strip. The derivative is adsorbed and the surface treatment of the metal thin film strip is performed. As the cellulose derivative, nitrocellulose, cellulose acetate propionate, cellulose acetate butyrate, ethyl cellulose and the like can be applied. When the metal is aluminum, the addition amount of the cellulose derivative is preferably 1 to 20% with respect to the metal thin film strip.

  After the surface treatment, the metal thin film strips are separated, or the metal thin film strip slurry is blended and dispersed in an appropriate resin material and an appropriate solvent as it is to obtain a high brightness ink. As the resin material, for example, (meth) acrylic resin, polyester, polyamide, polyurethane, shellac, alkyd resin, or the like is used. If necessary, additives having transparency, such as wax, plasticizer, leveling agent, surfactant, dispersant, antifoaming agent, and chelating agent may be added to the high-brightness ink. Solvents for high brightness ink include, for example, aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, esters such as ethyl acetate and propyl acetate, methanol, ethanol, Alcohols such as IPA, ketones such as acetone and MEK, alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether, and the like can be used.

  Ordinary inks are kneaded with a roll mill, ball mill, etc., and the pigmented additive is finely divided to submicron and highly dispersed to give printability. However, the high-intensity ink of the present invention does not use a kneading step A means of mixing with a stirrer is preferable, and it is better dispersed and the metallic luster is not impaired. That is, in order to develop a high-brightness metallic luster, it is necessary to set the size of the metal thin film strip to 5 to 50 μm. When the kneading process as described above is performed, the size of the metal thin film strip is required. Becomes less than 5 μm, which causes the metallic luster of the high-brightness ink reflecting layer 5 to be extremely lowered.

  Here, the size of the metal thin film strip is the maximum diameter of each individual thin film strip sampled at an arbitrary sampling (the part like a thin “beard” that is generated when it breaks). Is the maximum width in the region excluding), and is taken as the 100-point average value.

  The ink obtained as described above can be used in a roll coating method, a gravure coating method, a curtain coating method, a screen printing method, or a flexographic printing. In addition, a roll calendering process adds a shear in the in-plane direction to the metal thin film strips in the layer, and performs a drying process that controls the drying speed so as not to affect the orientation of the metal thin film strips during drying. Then, curing is performed as necessary to obtain the high-brightness ink reflecting layer 5.

  Since the metallic luster of the high-brightness ink reflecting layer 5 is composed of the reflected light from the metal thin film strip, it is desirable that the high-brightness ink reflecting layer 5 is covered with the metal thin film strip without any gap. Sometimes the best metallic luster can be obtained, but from another viewpoint, basically, the reflected light of the metal thin film strip that first blocks the light incident on the high-brightness ink reflective layer 5 Since the metallic luster property is determined, the number of layers of the thin metal thin film overlapping at the same position does not significantly affect the metallic luster property. That is, if the high-brightness ink reflective layer 5 has a necessary and sufficient thickness, stable and uniform reflected light can be obtained regardless of the thickness variation.

(Adhesive layer)
As the pressure-sensitive adhesive layer 6 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, vinyl acetate-acrylic 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 6 is generally about 8 to 30 g / m ² (solid content), and is applied and dried by a conventionally known method, that is, a gravure coat, roll coat, comma coat or the like. Thus, the pressure-sensitive adhesive layer 6 is formed. Further, the adhesive strength of the pressure-sensitive adhesive layer 6 is the peel strength between the high-brightness ink reflective layer 5 and the pressure-sensitive adhesive layer 6, and in the peeling method by 180 ° in accordance with JIS Z0237, in the range of 0.1 to 3.0 kg. Preferably, it is desirable to make it 2.0 kg to 3.0 kg. Of course, even higher peel strengths are suitable for the purposes of the present invention.

  In particular, a metal thin film is used for the reflection layer of a general hologram label, and strengthening the adhesive force between the metal thin film layer and a general pressure-sensitive adhesive includes that the metal bonding surface of the metal thin film is included in the pressure-sensitive adhesive. It is quite difficult because it is an (chemically) inert surface that does not change at all depending on the solvent used. On the other hand, since the surface of the high-brightness ink reflective layer 5 of the present invention is a (chemically) active surface with a resin material or a solvent used for the adhesive, the high-brightness ink reflective layer 5 is used. The adhesive force (peeling strength) between the adhesive layer 6 and the adhesive layer 6 can be set high, and the anti-counterfeiting property can be enhanced.

  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 6 is in contact with the hologram layer H ′.

(Transparent substrate or adhesive layer)
The transparent substrate 7 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 7 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 7 is subjected to a surface inactivation treatment such as silicon treatment to suppress the peel strength of the transparent substrate 7 to a desired value.

  The thickness of the transparent substrate 7 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 a 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.

  Further, a release layer (not shown) having releasability from the hologram forming layer 1 and the “transparent colored pattern layer A” 3 may be provided on the transparent substrate 7. Desirably, the material 7 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 8 is provided on the high brightness ink reflecting layer 5. (See Figure 3.)
Since the adhesive is used to ensure adhesion to an object for preventing counterfeiting, it has good adhesion to the high-brightness ink reflective layer 5 and the like, and can adhere firmly to the object that is the adherend. Those are 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.

  Also, the adhesive force between the adhesive layer 8 and the high-brightness ink reflective layer 5 is the same as the adhesive force between the pressure-sensitive adhesive layer 6 and the high-brightness ink reflective layer 5. Forgery prevention can be improved.

The hologram transfer sheet H ″ of the present invention is overlaid so that the adhesive layer 8 is in contact with the object, heated from 100 ° to 200 ° from the transparent substrate 7 side, and 1 g / mm ^{2 to} 100 g / mm ² . By applying pressure to the object and then peeling off only the transparent substrate 7, it can be easily applied to an object for preventing forgery.

  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 20%) is formed by forming a melamine resin having a thickness of 50 μm 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) Hologram relief 2 was formed on one surface of hologram forming layer 1 with a pressure cylinder diameter of 0.3 m, water-cooled, pressure of 2 ton / m, 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 to form a red character (logo) “BR ND” having a thickness of 5 μm.
The size of this character is 5mm x 5mm, and it is a design in which 5 characters including one blank are repeated and placed on the top and bottom (with a 2mm gap in the top and bottom direction and a 3mm gap in the left and right direction) Was provided). The line width of the characters “BR 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, “colored pattern layer B “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 four blanks and one letter, and the position of “A” is located in the center of “logo” “BR ND” of “transparent coloring pattern layer A” 3 Arranged to be. The line width of the letter “A” was also about 300 μm. (This design corresponds to “pattern a”.)
(See Figure 1)
Furthermore, the thickness after drying becomes 5 μm by the gravure reverse method using the following high-intensity ink composition so as to contact and follow the hologram relief 2 surface and “colored pattern layer B” 4. The high brightness ink reflecting layer 5 was formed by calendaring with a silicon resin roll having a linear pressure of 200 ° C. and 100 kg / cm, and the hologram sheet H of Example 1 was obtained. (See Figure 1)
・ <High brightness ink composition>
Acrylic resin 10 parts by weight Vinyl chloride / vinyl acetate resin 15 parts by weight Urethane resin 5 parts by weight Aluminum metal thin film strip (isocyanate treatment, thickness 0.08 μm, average diameter 30 μm) 3 parts by weight Toluene 27 parts by weight Isopropyl alcohol 25 5 parts by weight Part Ethyl acetate 1 5 parts by mass The hologram sheet H was observed from the hologram forming layer 1 side under the illumination of an indoor fluorescent lamp. When the hologram sheet H was observed from the front, the red “BR ND” The letter and the red letter “A” receive the reflected light from the high-brightness ink reflecting layer 5 from behind, and the “color” of the red letter “BR ND” and the “color” of the red letter “A” It is visually recognized as “same”, and as if those characters were combined, “one logo” called “BRAND” consisting of the “red one color” was printed. It recognized in so that (for the "pattern a" and "pattern b" is the same color, together, meant to be visible as a "pattern C""BRAND".).

  When the angle at which the hologram sheet H is observed is observed as the direction in which the hologram is reproduced, only the characters “BR ND” that are the characters of the “transparent colored pattern layer A” 3 appear bright and the “color” changes. In addition, since the “color” of the character “A”, which is the character of “colored pattern layer B” 4, is not changed, the authenticity thereof can be easily determined.

Further, the reproduced hologram reproduction image produced a unique hologram effect, and the level difference of the “colored pattern layer B” 3 was inconspicuous. (Not shown)
From the above, it was considered that the hologram sheet H of the present invention has a high anti-counterfeit property.

(Example 2)
As in Example 1, except that an acrylic resin (haze 2%) was used as the transparent resin layer constituting the hologram forming layer 1 and an ink having the following composition was used for the “transparent colored pattern layer A” 3. The hologram sheet H of Example 2 was obtained. (See Figure 1)
・ <Composition for transparent colored pattern layer A>
Acrylic resin Acrylic resin (Haze 2%) 30 parts by weight Reid C particulate organic pigment 1 part by weight Toluene 30 parts by weight Isopropyl alcohol 3 4 parts by weight Butyl cellsolve 5 parts by weight
The hologram sheet H This was evaluated in the same manner as in Example 1, changes in the "color" of "transparent colored pattern layer A" 3 (blue), except that which is more clearly visible, as in Example 1 Similar good evaluation results were obtained.

(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 B" 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 B>
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 B” 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 B” of Example 3. (See Figure 1)
・ <Composition for transparent colored pattern layer A and colored pattern layer B>
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 1. However, the implementation was performed except that the disappearance effect of the hologram relief 2 in the region of the “colored pattern layer B” 4 was felt strongly (meaning that “color” does not change even if the observation angle is changed). Good evaluation results similar to Example 1 were obtained.

(Example 5)
On the high-brightness ink reflective layer 5 of Example 1, a pressure-sensitive adhesive layer 6 having the following composition having a large adhesive force with the high-brightness ink reflective layer 5 was formed to a thickness of 30 μm. I got ´. (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 6 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, when the hologram label H ′ was peeled off from the object, it was determined that the anti-counterfeiting property was improved because the high-brightness ink reflecting layer 5 and the adhesive layer 6 were deformed or broken, respectively. did it.

(Example 6)
25 μm polyethylene terephthalate is used as the transparent substrate 7, and “transparent colored 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 B” 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 mass Toluene 40 parts by mass Isopropyl alcohol 10 0 parts by mass Ethyl acetate 20 parts by weight A high-brightness ink reflection layer 5 is formed in the same manner as in Example 1, and the high-brightness ink reflection is formed thereon. An adhesive layer 8 having the following composition and having a large adhesive strength with the layer 5 was formed to a thickness of 10 μm using a gravure coating method, to obtain a hologram transfer sheet H ″ of Example 6. (See Figure 3.)
The surface of the adhesive layer 8 of the hologram transfer sheet H ″ is placed in contact with the surface of the object to be given anti-counterfeiting, and heated and heated at 120 °, 10 g / mm ² from the transparent substrate 7 side. After pressing, the transparent substrate 7 was peeled off, and a hologram portion (a portion where the transparent substrate 7 was peeled off from the configuration of the hologram transfer sheet H ″) was transferred onto the object.

  The hologram part could no longer be peeled off from the object at all, and the same good evaluation as in Example 1 was obtained except that it seemed to have high anti-counterfeiting properties.

(Example 7)
In Example 6, the hologram transfer sheet H ″ of Example 7 was obtained in the same manner except that the high-brightness ink reflective layer 5 was manufactured from a TiOx thin film. (See Figure 3.)
When this hologram transfer sheet H ″ was transferred onto the design of the object that imparts anti-counterfeiting in the same manner as in Example 6, the brightness itself of the high-brightness ink reflecting layer 4 was slightly reduced, but the hologram portion The design can be visually recognized through the hologram reproduction image of the hologram transfer sheet H ″ and the “logo” of the “colored pattern layer A” 3 and the “colored pattern layer B” 4. As in Example 6, a good evaluation result was obtained except that the anti-counterfeiting property was improved and the anti-counterfeiting property became higher.

(Example 8)
In Example 3,
A hologram sheet H of Example 8 was obtained in the same manner as Example 3 except that the high-brightness ink reflecting layer 5 was formed using the following high-brightness ink composition. (See Figure 1)
・ <High brightness ink composition>
Acrylic resin (n = 1.47) 5 parts by mass Vinyl chloride / vinyl acetate resin (n = 1.47) 5 parts by mass Urethane resin (n = 1.60) 15 parts by mass Unsaturated polyester resin (n = 1.64) ) 10 parts by weight Aluminum metal thin film strip (isocyanate treatment, thickness 0.08 μm, average diameter 30 μm) 3 parts by weight Toluene 27 parts by weight Isopropyl alcohol 15 parts by weight Ethyl acetate 10 parts by weight Methyl ethyl ketone 10 parts by weight This hologram sheet H Was evaluated in the same manner as in Example 3. As a result, the intensity of reflected light from the high-brightness ink reflecting layer 5 was increased, the hologram reproduction image became clearer, and the anti-counterfeiting property was improved. The same good evaluation results were obtained.
(Comparative example)
(Comparative Example 1) “BRAND” “LOGO” is formed using the same composition as “transparent coloring pattern layer A” 3 without providing “transparent coloring pattern layer A” 3 and “coloring pattern layer B” 4. A hologram sheet of Comparative Example 1 was obtained in the same manner as Example 1 except that it was formed uniformly.

  When this hologram sheet was evaluated in the same manner as in Example 1, the “BRAND” “logo” formed was visually recognizable, and the “BRAND” “logo” was placed on the hologram sheet. However, it was thought that the same thing could be easily made by merely 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 B
5 High-brightness ink reflective layer 6 Adhesive layer 7 Transparent substrate 8 Adhesive layer

Claims (6)

Hologram forming layer provided with hologram relief on one surface of transparent resin layer, transparent colored pattern layer A formed on the other surface of the transparent resin layer, and colored pattern layer B formed so as to fill the hologram relief And a hologram sheet comprising a high-luminance ink reflecting layer provided so as to follow the hologram relief or the colored pattern layer B,
When the hologram sheet is observed from the transparent resin layer side, the transparent colored pattern layer A and the colored pattern layer B have the same color and are visually recognized as one pattern C formed with the color. A hologram sheet characterized by that.
2. The hologram sheet according to claim 1, wherein a difference between a refractive index of the hologram forming layer and a refractive index of the high-brightness ink reflecting layer is 0.1 or more and 0.3 or less.
The hologram sheet according to claim 1 or 2, wherein the haze of the transparent resin layer and the transparent colored pattern layer A is 10% or less.
The colored pattern layer B is transparent, and the refractive index of the hologram forming layer and the refractive index of the colored pattern layer B are the same or the difference in refractive index is 0.1 or less. The hologram sheet according to claim 1.
A hologram label, wherein an adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheet according to claim 1.
  An adhesive layer is provided on the high-brightness ink reflecting layer of the hologram sheet according to claim 1, and the transparent substrate is peeled off so as to cover the transparent resin layer and the transparent colored pattern layer A. A hologram transfer sheet characterized by being provided.

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