Label

Abstract

Provided is a label that enables both printing display or the like and a hologram to coexist in a visually recognizable state even if the label is small.　A label (1) comprises an information display part (12) provided to the obverse side of a body-side base material layer (11), and a cover layer (20) that covers at least the information display part (12) and is laminated on the body layer (10) in a form in which at least a portion thereof can be peeled. The cover layer (20) has a cover-side base material layer (21), a print layer (22) formed on the obverse side from the cover-side base material layer (21), and a hologram layer (23) formed on the obverse side from the print layer (22). The hologram layer (23) has a prescribed angle range in which a volume-reflective hologram reproduction image of the hologram layer (23) is not observed and only the print layer (22) is observed under observation carried out using a light source for which no irradiation direction is specified.

Description

Technical Field

[0001] This disclosure relates to labels.

Background Art

[0002] For the purpose of sales promotion, etc., labels are used to display the content of sales promotion campaigns, serial numbers necessary for applying for presents or lotteries, and the like. Such labels are provided, for example, as described in Patent Document 1, at a position where hidden information such as serial numbers cannot be seen while the label is attached, and by opening a part of the label or the like, the serial numbers and the like can be visually recognized. As a result, only those who have purchased the product can apply for presents or lotteries by opening or peeling off the label. Also, by displaying a unique ID with a two-dimensional code or the like, it is also effective for authenticity determination to determine whether it is a genuine product.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, such conventional labels could be relatively easily manufactured in a similar form using ordinary printing technology. Therefore, when a malicious person attaches a forged label or the like to a product or the like, it has been difficult to distinguish between genuine and forged products.

[0005] As a technology that makes forgery difficult and authenticity determination easy, holograms are used. For example, it has been conventionally practiced to attach a hologram to a part of a security note or the like. If the hologram technology can be applied to the above-described label, it becomes possible to prevent forgery and determine authenticity at a relatively low cost.

[0006] However, for labels that display the content of a sales promotion campaign, serial numbers necessary for applying for a present or a lottery, etc., a printed display or the like indicating that it is such a label is required. Usually, such a label is attached to a sold product only for a specific period, and in order to be attachable to a limited space that does not interfere with other displays of the product, it may sometimes be only as large as a coin. Therefore, in such a small label, there may not be an area large enough to separately arrange both the above-described printed display or the like and the hologram in a visible size. Therefore, it has not been possible to coexist the printed display or the like and the hologram on such a small label.

[0007] In addition, in the case where the article to which such a conventional label is attached has transparency (light transmissibility), there has been a risk that information such as a serial number can be seen through from the front side or the back side of the label. In particular, when the label is irradiated with strong light or held up to a strong light source, at first glance, the information such as the serial number may not be visible, or even if the label is attached in a state where the information such as the serial number cannot be understood without peeling it off, there is a risk that the information such as the serial number can be obtained.

[0008] An object of the present disclosure is to provide a label that can coexist both a printed display or the like and a hologram in a visible state even in a small label. Another object of the present disclosure is to provide a label that can prevent concealed information from being obtained even when attached to an article having light transmissibility.

Means for Solving the Problems

[0009] The present disclosure solves the above problems by the following solutions. For ease of understanding, reference numerals corresponding to embodiments of the present disclosure are used for explanation, but the present disclosure is not limited thereto.

[0010] A first disclosure is a label (1) including a main body layer (10) having a main body side base material layer (11) and attached to an article, an information display portion (12) provided on a front side of the main body side base material layer (11), and a cover layer (20) covering at least the information display portion (12) and laminated on the main body layer (10) in a form where at least a part thereof is peelable. The cover layer (20) has a cover side base material layer (21), a printing layer (22) formed on a front side of the cover side base material layer (21), and a hologram layer (23) formed on a front side of the printing layer (22).

[0011] A second disclosure is a label (1) including a main body layer (10) having a main body side base material layer (11) and attached to an article, an information display portion (12) provided on a front side of the main body side base material layer (11), and a cover layer (20) covering at least the information display portion (12) and laminated on the main body layer (10) in a form where at least a part thereof is peelable. The cover layer (20) has a cover side base material layer (21), a printing layer (22) formed on a front side of the cover side base material layer (21), and a hologram layer (23) formed on a front side of the printing layer (22). The hologram layer (23) has a predetermined angular range in which only the printing layer (22) is observed without observing a volume reflection type hologram reproduction image of the hologram layer (23) under observation by a light source that does not specify an irradiation direction.

[0012] The third disclosure is that in the label (1) described in the second disclosure, the hologram layer (23) is converted into a Fourier transform hologram reproduction image (H1) when detection light from a point light source (LS) arranged at a distance from the incident surface is incident thereon, and a second interference fringe that is converted into the volume reflection type hologram reproduction image (H2) when light from a light source that does not specify the irradiation direction is incident on the incident surface, are superimposed and recorded. The label (1) is characterized by this.

[0013] The fourth disclosure is that in the label (1) described in the third disclosure, the Fourier transform hologram reproduction image (H1) is observed in the normal direction of the incident surface when the detection light from the point light source (LS) is irradiated from the normal direction of the incident surface. The label (1) is characterized by this.

[0014] The fifth disclosure is that in the label (1) described in any one of the second disclosure to the fourth disclosure, the main body layer (10) includes an adhesive layer (13) for label attachment laminated on the back side of the main body side base material layer (11), and a separator layer (14) covering the adhesive layer (13) for label attachment. The label (1) is characterized by this.

[0015] The sixth disclosure is that in the label (1) described in any one of the second disclosure to the fifth disclosure, the cover layer (20) includes a hologram bonding layer (24) that bonds the cover side base material layer (21), the printing layer (22), and the hologram layer (23), and a protective layer (25) that is on the front side of the hologram layer (23) and protects the hologram layer (23). The label (1) is characterized by this.

[0016] The seventh disclosure is a label (1) described in any one of the second to sixth disclosures, comprising a cover bonding layer (30) that bonds the main body layer (10) and the cover layer (20), the cover bonding layer (30) being provided at a position that does not overlap with the information display portion (12), and the cover layer (20) having a planned cutting line (26) that facilitates cutting near the boundary between the range where the cover bonding layer (30) is provided and the range where it is not provided.

[0017] The eighth disclosure is a label (1) described in any one of the second to third disclosures, having a cut portion (1a) cut at the same position of both the main body layer (10) and the cover layer (20).

[0018] The ninth disclosure is a label (201) comprising a main body layer (210) having a main body side base material layer (211) and attached to an article (100), an information display portion (212) provided on the front side of the main body side base material layer (211), and a cover layer (220) that covers at least the information display portion (212) and is laminated on the main body layer (210) in a form that is at least partially peelable. The cover layer (220) has a cover side base material layer (221), a printing layer (222) formed on the front side of the cover side base material layer (221), and a hologram layer (223) formed on the front side of the printing layer (222). The label (201) is provided at a position that overlaps with the information display portion (212) in the thickness direction of the label (201), and is provided with information concealment portions (213, 226) that prevent the information displayed by the information display portion (212) from being known through the label (201).

[0019] The tenth disclosure is a label (201) described in the ninth disclosure, which has a first interference fringe that is converted into a Fourier transform hologram reproduction image when detection light from a point light source (LS) disposed at a distance from the incident surface is incident on the label (201), and the information concealment portion (213, 226) conceals the information displayed by the information display portion (212) even when the detection light irradiates the position of the information display portion (212).

[0020] The eleventh disclosure is a label (201) described in the tenth disclosure, wherein the hologram layer (223) records the first interference fringe and a second interference fringe that is converted into a volume reflection type hologram reproduction image when light from a light source that does not specify an irradiation direction is incident on the incident surface.

[0021] The twelfth disclosure is a label (201) described in any one of the ninth disclosure to the eleventh disclosure, wherein the information concealment portion (213, 226) includes a concealment printing layer (226) that is formed on the back side of the cover side base material layer (221) and has concealment properties.

[0022] The thirteenth disclosure is a label (201) described in any one of the ninth disclosure to the twelfth disclosure, wherein the information concealment portion (213, 226) includes a concealment adhesive layer (213) for label attachment that is laminated on the back side of the main body side base material layer (211) and has concealment properties.

[0023] The fourteenth disclosure is a label (201) described in any one of the ninth disclosure to the thirteenth disclosure, wherein the cover layer (220) includes a hologram bonding layer (224) that bonds the cover side base material layer (221), the printing layer (222), and the hologram layer (223), and a protective layer (225) that is on the front side of the hologram layer (223) and protects the hologram layer (223).

[0024] The 15th disclosure is a label (201) described in any one of the 9th to 14th disclosures, comprising a cover bonding layer (230) that bonds the main body layer (210) and the cover layer (220). The cover bonding layer (230) is provided at a position that does not overlap with the information display portion (212). The cover layer (220) has a planned cutting line (227) that facilitates cutting near the boundary between the range where the cover bonding layer (230) is provided and the range where it is not provided. The label (201) is characterized by this.

[0025] The 16th disclosure is a label (201) described in any one of the 9th to 15th disclosures, characterized by having a cut portion (201a) cut at the same position on both the main body layer (210) and the cover layer (220).

Advantages of the Invention

[0026] According to the present disclosure, it is possible to provide a label that can coexist both a printed display or the like and a hologram in a visible state even for a small label.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0028] Hereinafter, an embodiment for carrying out the present disclosure will be described with reference to the drawings and the like.

[0029] (First Embodiment) FIG. 1 is a front view showing a first embodiment of label 1 according to the present disclosure from the front side. FIG. 2 is a cross-sectional view of label 1 cut along the position of arrow A-A in FIG. 1. FIG. 3 is a front view showing a state where the cover layer 20 is removed from label 1. Note that, including FIGS. 1 to 3, each of the following figures is a schematically shown figure, and the size and shape of each part are exaggerated or omitted as appropriate for easy understanding. In the following description, specific numerical values, shapes, materials, etc. are shown for the description, but these can be changed as appropriate. In the present invention, transparent means at least transmitting light of the wavelength to be used.

[0030] Label 1 of the present embodiment is formed in a substantially square shape when viewed from the front side, and is used by being attached to an article such as a product during a sales promotion campaign or the like. Label 1 has a main body layer 10 and a cover layer 20, and a part of the cover layer 20 can be easily peeled off and opened from the main body layer 10. Note that the front side (or the front surface side) in FIG. 1 and the protective layer 25 side in FIG. 2 are referred to as the front side, and the back side (or the back surface side) in FIG. 1 and the separator layer 14 side in FIG. 2 are referred to as the back side.

[0031] The main body layer 10 is laminated with an information display portion 12, a main body side base material layer 11, an adhesive layer 13 for label attachment, and a separator layer 14 in this order from the front side.

[0032] It is desirable to use a resin film, a resin sheet, paper, etc. for the main body side base material layer 11, but the material can be any kind. For example, as the main body side base material layer 11, inkjet paper, high-quality paper, kraft paper, copying paper, glassine paper, rayon paper, coated paper, synthetic paper, paper laminated with a resin film, NIP high-quality paper, stretched polypropylene, polyethylene terephthalate, stretched polystyrene, polyvinyl chloride, etc. can be used. By forming the main body side base material layer 11 using the above materials, label 1 has flexibility and can be appropriately attached even if the surface of the article to be attached is a curved surface.

[0033] The information display unit 12 displays various visible information. The display content displayed by the information display unit 12 may be of any kind. For example, it may be a character code indicating specific information by a combination of character strings, a barcode, a code having information by a pattern in a figure, or a two-dimensional code. Also, the display content displayed by the information display unit 12 may be fixed information that does not change depending on the label, or may be unique variable information (ID: Identification) with different contents for each individual label. Here, examples of the variable information include a serial number for campaign application and the like. The information display unit 12 can be formed by printing on the front side of the main body side base material layer 11. In the present embodiment, the information display unit 12 displays unique information by a two-dimensional code. Also, the front side of the information display unit 12 is not joined to the back surface of the cover side base material layer 21.

[0034] The adhesive layer 13 for label attachment is laminated on the back side of the main body side base material layer 11 and is composed of an adhesive for attaching to an article such as a product when using the label 1. For the formation of the adhesive layer 13 for label attachment, a normal adhesive having an adhesive action can be widely used. As the solvent-based adhesive, rubber-based ones such as NR, SBR, IR, and CR are mainstream, but an emulsion-type acrylic adhesive can also be used. In addition, there are silicone-based, polyvinyl ether-based, etc., and any of them can be used. A hot melt adhesive may also be used. Since the adhesive layer 13 for label attachment does not affect the visibility of the information display unit 12 and the printing layer 22, light transmissibility is not required.

[0035] The separator layer 14 is a member also known as so-called release paper, release sheet, etc., and is laminated on the back side of the adhesive layer 13 for label attachment. The separator layer 14 protects the adhesive layer 13 for label attachment in the unused state, that is, in the label 1 before being attached to an article, and is provided so that the adhesive layer 13 for label attachment does not inadvertently stick to other articles or the like. In the figure, the separator layer 14 is shown as a single layer, but the separator layer 14 may be configured, for example, as a laminate of a base material layer and a release layer. The separator layer 14 is peeled off and removed when the label 1 is attached to an article. As the separator layer 14, the same material as the main body side base material layer 11 can be used, and a material obtained by adding silicone oil to an ultraviolet curable (UV type) ink for offset printing or a material obtained by adding silicone acrylate can be applied to the surface forming the adhesive layer 13 for label attachment to impart releasability. Also, a normal thermosetting release ink may be applied to the same material as the main body side base material layer 11 to form the separator layer 14.

[0036] The cover layer 20 is partially joined to the front side of the main body layer 10 using a cover joining layer 30 described later. The cover layer 20 has a protective layer 25, a hologram layer 23, a hologram joining layer 24, a printing layer 22, and a cover side base material layer 21 laminated in this order from the front side.

[0037] It is desirable to use a resin film, resin sheet, paper, etc. for the cover side base material layer 21, but the material may be any kind. For example, as the main body side base material layer 11, inkjet paper, high-quality paper, kraft paper, copying paper, glassine paper, rayon paper, coated paper, synthetic paper, paper laminated with a resin film, NIP high-quality paper, stretched polypropylene, polyethylene terephthalate, stretched polystyrene, polyvinyl chloride, etc. can be used. The cover side base material layer 21 may use the same material as the main body side base material layer 11. The cover side base material layer 21 does not have light transmittance to the extent that the display of the information display portion 12 can be visually recognized under normal environmental conditions. Therefore, in a state where the cover layer 20 covers the main body layer 10, usually, the display of the information display portion 12 cannot be visually recognized.

[0038] The printing layer 22 is provided on the front side of the cover-side base material layer 21. For example, characters representing product names, campaigns, etc. are printed and displayed on the printing layer 22. In the present embodiment, characters representing a campaign and an explanation, and (▽OPEN) indicating the position to open the cover layer 20 are displayed by printing.

[0039] When the detection light from a point light source arranged at a distance from the incident surface is incident on the hologram layer 23, the hologram layer 23 is recorded with a first interference fringe that is converted into a Fourier transform hologram reproduction image and a second interference fringe that is converted into a volume reflection type hologram reproduction image when light from a light source that does not specify an irradiation direction is incident on the incident surface. Here, the "incident surface" is the incident surface of the hologram layer 23, and more specifically, it is the front surface of the hologram layer 23. However, since the hologram layer 23 is not exposed to the outside, substantially, the "incident surface" is the surface of the protective layer 25. Also, the "light from a light source that does not specify an irradiation direction" means light that reaches the hologram layer 23 in a situation where the light source is not controlled, such as indoors or outdoors, without irradiating light from a specific direction in order to visually recognize the hologram. For example, diffused light reaching the hologram layer 23 from various directions can be exemplified. Also, when the label 1 is attached to an article such as a product, in the state where the article such as a product is held in the hand, the positional relationship with the light source is not specified, and it is assumed that light reaches the label 1 from various directions. Such a case can also be cited as an example of the state where "light from a light source that does not specify an irradiation direction is incident on the incident surface". The configuration of the hologram layer in which the first interference fringe converted into the Fourier transform hologram reproduction image and the second interference fringe converted into the volume reflection type hologram reproduction image are superimposed, and the manufacturing method are disclosed in Japanese Patent Application Laid-Open No. 2022-177038. The hologram layer 23 of the present embodiment has the same configuration as that of the above-mentioned Japanese Patent Application Laid-Open No. 2022-177038 and is manufactured by the same manufacturing method, and detailed description here is omitted.

[0040] In addition, when observed under a light source that does not specify the irradiation direction, the hologram layer 23 of the present embodiment is configured such that when observed within a predetermined angular range from the normal direction of the label, the volume reflection hologram reproduction image is not displayed outward, and when observed from a range exceeding the predetermined angular range from the normal direction of the label, the volume reflection hologram reproduction image is displayed outward. Thus, the second interference fringes are formed.

[0041] The hologram layer 23 is basically light-transmissive, and the printed display of the printed layer 22 can be visually recognized through the hologram layer 23. Further, in a situation where the hologram reproduction image is visually recognized, since the hologram reproduction image also has transparency, the printed layer 22 can be visually recognized through the hologram reproduction image, but due to the presence of the hologram reproduction image, the printed layer 22 cannot be clearly visually recognized. The appearance of the hologram layer 23 will be described later.

[0042] The hologram bonding layer 24 is laminated between the printed layer 22 and the hologram layer 23, and is a layer that bonds (adheres) the hologram bonding layer 24 and the printed layer 22. As the hologram bonding layer 24, for example, it can be a heat-seal layer that exhibits adhesiveness when heated and pressurized. The hologram bonding layer 24 needs to have light-transmittance (transparency) in order to make the printed display of the printed layer 22 visible through the hologram layer 23. The hologram bonding layer 24 can be formed using a material containing cations. For example, the hologram bonding layer 24 can be formed using an emulsion-type acrylic material, a rubber-based material, a silicon-based material, or the like. Further, the hologram bonding layer 24 can be formed using an adhesive similar to the adhesive layer 13 for label attachment, but it needs to have light-transmittance. The thickness of the hologram bonding layer 24 is preferably, for example, 0.1 μm or more and 20 μm or less. This is because if the thickness of the hologram bonding layer 24 is less than 0.1 μm, sufficient adhesive strength with the printed layer 22 cannot be obtained, and if it is 20 μm or more, blocking is likely to occur during the hologram manufacturing process.

[0043] The protective layer 25 is provided on the front side of the hologram layer 23 and is a transparent layer that protects the hologram layer 23. As the protective layer 25, for example, an overprint layer (OP layer) formed by applying overprint varnish can be used.

[0044] In addition to the cover-side base material layer 21, the printing layer 22, the hologram bonding layer 24, the hologram layer 23, and the protective layer 25 described above, a primer layer may be disposed between the hologram bonding layer 24 and the hologram layer 23 in the cover layer 20. The primer layer is not shown in the drawings and is omitted. The primer layer can be configured entirely or partially for each layer between the hologram bonding layer 24 and the hologram layer 23. The adhesive strength between the hologram bonding layer 24 and the hologram layer 23 is improved by providing the primer layer. Further, the durability of the laminated configuration state of the cover layer 20 before being laminated with the main body layer 10 or the cover bonding layer 30 is improved by providing the primer layer.

[0045] The cover bonding layer 30 is a layer that bonds the main body layer 10 and the cover layer 20 and is provided at a position that does not overlap with the information display portion 12. As shown in FIG. 3 in this embodiment, the cover bonding layer 30 is formed in a substantially U shape along three sides of a square surrounding the information display portion 12 when viewed from the front side. Since the cover bonding layer 30 is provided at a position that does not overlap with the information display portion 12, light transmissivity is not required, and it can be configured using an adhesive similar to the adhesive layer 13 for label attachment.

[0046] Further, the cover layer 20 has a planned cutting line 26 that facilitates cutting near the boundary between the area where the cover bonding layer 30 is provided and the area where it is not provided. The planned cutting line 26 may be a perforation where the cut portion and the non-cut portion are linearly continuous, or may be a partial cut that cuts halfway through the cover layer 20 in the thickness direction. Also, the planned cutting line 26 may be a perforation where the cut portion and the non-cut portion are linearly continuous, and the cut portion may be in a state of being cut all the way to the main body layer 10. In the present embodiment, the planned cutting line 26 is a perforation that extends from the end of one side of the cover layer 20 where the cover bonding layer 30 is not provided along the side facing this side to a position near the cover bonding layer 30 without overlapping the cover bonding layer 30.

[0047] FIG. 4 is a diagram showing a state in which the cover layer 20 is cut along the planned cutting line 26 and the central portion of the cover layer 20 is peeled off and opened. As shown in FIG. 4, by cutting along the planned cutting line 26, the central portion of the cover layer 20 in the area where the cover bonding layer 30 is not provided can be peeled off and opened, and the display on the information display portion 12 can be made visible. Even if a part of the cover layer 20 is peeled off and opened, one end is maintained in a state of being joined to the main body layer 10 by the cover bonding layer 30, so it is not separated from the main body layer 10. A consumer who has purchased a product or the like can open the cover layer 20 by turning up a part of it as shown in FIG. 4 and use the information such as the two-dimensional code displayed on the information display portion 12.

[0048] Also, the label 1 has cut portions 1a that are cut at the same positions on both the main body layer 10 and the cover layer 20. In the present embodiment, the cut portions 1a are provided at each of the four corners of the label 1 when viewed from the front side. When trying to peel off the label 1 attached to a product or the like, the label 1 can be torn starting from these cut portions 1a, preventing it from being reattached. Further, if the planned cutting line 26 is a perforation where the cut portion and the non-cut portion are linearly continuous and the cut portion is in a state of being cut all the way to the main body layer 10, the label 1 can be torn starting from the planned cutting line 26, preventing it from being reattached.

[0049] Next, the appearance of the hologram layer 23 will be described. FIG. 5 is a diagram showing how the label 1 looks when observed from within a predetermined angular range from the normal direction of the label 1 under observation by a light source whose irradiation direction is not specified. As shown in FIG. 5, when observed from within a predetermined angular range (within the range of ±θ in FIG. 5) from the normal direction of the label 1 under observation by a light source whose irradiation direction is not specified, neither the hologram image from the first interference fringes nor the second interference fringes of the hologram layer 23 are visually recognized. Therefore, the hologram layer 23 is observed as being transparent, and the display of the printing layer 22 is visible. The information displayed on the printing layer 22 is information such as the product name and campaign information, and it is important that it is easy for consumers to see. Therefore, it is important that the display of the printing layer 22 is visible without being obstructed by the hologram layer 23 when the label 1 is observed from within a predetermined angular range from the normal direction of the label 1 under observation by a light source whose irradiation direction is not specified. Note that the range of ±θ shown in FIG. 5 where the hologram image is not visually recognized can be appropriately changed according to the setting of the hologram layer 23.

[0050] Note that the volume reflection type hologram only appears to be invisible to the human eye even though the display of the printing layer 22 is visible, but actually exists. That is, when the angle at which the article with the label 1 attached is observed is changed, the volume reflection type hologram will have its reproduced hologram image visually recognized when observed from a direction that matches the angle at which the reproduced hologram image is visible, and will be difficult to visually recognize or not visually recognized and appear to disappear when observed from a direction outside the angular range where the reproduced hologram image is visible. The range of ±θ shown in FIG. 5 in the above example is the angular range that is outside the angular range where the reproduced hologram image is visible.

[0051] Also, for the sake of easy understanding, an example was given and explained here in which when label 1 is viewed within a predetermined angular range from the normal direction of label 1 under observation by a light source without specifying the irradiation direction, the hologram layer 23 is observed to be transparent. However, the central direction in the direction where label 1 cannot be visually recognized under observation by a light source without specifying the irradiation direction (in the above example, the normal direction of label 1 was exemplified) can be changed as appropriate. The angle at which the hologram reproduced image can be visually recognized can be set as appropriate during replication (manufacture), and can be arbitrarily set according to the situation in which label 1 is used and the article to which label 1 is attached, etc. For example, contrary to the above example, that is, a configuration may be adopted in which the volume reflection type hologram reproduced image is observed within an angular range close to the normal direction of label 1, and the volume reflection type hologram reproduced image is not observed when viewed from a direction at a large angle from the normal direction of label 1.

[0052] Also, as described above, in label 1 of the present embodiment, there is a predetermined angular range (±θ in the example of FIG. 5) in which only the printing layer 22 is observed without observing the volume reflection type hologram reproduced image of the hologram layer 23. The predetermined angular range in which only the printing layer 22 is observed without observing the volume reflection type hologram reproduced image can also be set as appropriate during replication (manufacture), and can be arbitrarily set according to the situation in which label 1 is used and the article to which label 1 is attached, etc. For example, when label 1 is attached to a flat surface as shown in FIG. 5, for example, θ = 20 degrees to 60 degrees can be exemplified. Note that the specific examples of the above angles are just examples and can be changed as appropriate.

[0053] FIG. 6 is a view showing how label 1 looks when observed from a range exceeding a predetermined angular range from the normal direction of label 1 under observation with a light source whose irradiation direction is not specified. As shown in FIG. 6, when observed from a range exceeding a predetermined angular range from the normal direction of label 1 under observation with a light source whose irradiation direction is not specified, the volume reflection hologram reproduction image H2 reproduced by the second interference fringes overlaps with the display of the printing layer 22 and is visually recognized. Since this volume reflection hologram reproduction image H2 is visible under observation with a light source whose irradiation direction is not specified, that is, under normal ambient light, it can be easily confirmed that label 1 is genuine, and the anti-counterfeiting effect can be enhanced.

[0054] The authenticity determination effect and the anti-counterfeiting effect by the above volume reflection hologram reproduction image H2 are easily and surely exhibited. However, if a person with malicious intent having hologram manufacturing technology exists, counterfeiting may be possible and authenticity determination may become difficult. Therefore, in label 1 of the present embodiment, in order to further enhance the authenticity determination effect and the anti-counterfeiting effect, the Fourier transform hologram reproduction image H1 (see FIG. 7) reproduced by the first interference fringes can be utilized.

[0055] FIG. 7 is a diagram showing how it looks when the detection light from a point light source arranged at a distance from the incident surface is made incident on label 1. As shown in FIG. 7, the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes overlaps with the display of the printing layer 22 and is visually recognized by the detection light irradiated from the point light source LS. Also, as shown in FIG. 7, the display of the printing layer 22 is difficult to see with the naked eye while the point light source LS is being irradiated. This is because the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes is emphasized more than the printing layer 22. By visually recognizing this Fourier transform hologram reproduction image H1, it is possible to confirm that it is a genuine product. This Fourier transform hologram reproduction image H1 can be visually recognized only when the detection light from the point light source is made incident on label 1. Therefore, since it is not visually recognized under normal observation environments, it is difficult to notice the existence of the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes, and it is possible to further enhance the anti-counterfeiting effect. And because the anti-counterfeiting effect is high, the authenticity determination effect, that is, the accuracy of being a genuine product becomes higher.

[0056] As described above, according to the present embodiment, when observed from within a predetermined angular range with respect to label 1, the volume reflection type hologram reproduction image is not displayed outward, and when observed from a range exceeding the predetermined angular range with respect to label 1, the hologram layer 23 in which the volume reflection type hologram reproduction image is displayed outward is provided. Thereby, even if the display of the printing layer 22 and the hologram image coexist in a small range, both can be clearly visually recognized. Therefore, even for a small label, both the printed display and the hologram can coexist in a visually recognizable state.

[0057] Further, the hologram layer 23 further includes first interference fringes that are converted into a Fourier transform hologram reproduction image when the detection light from the point light source LS arranged at a distance from the incident surface is made incident. Since the Fourier transform hologram reproduction image H1 is emphasized more than the printing layer 22, the display of the printing layer 22 becomes difficult to see. Therefore, the authenticity determination effect and the anti-counterfeiting effect can be further enhanced.

[0058] (Second Embodiment) FIG. 8 is a front view showing a second embodiment of the label 201 according to the present disclosure from the front side. FIG. 9 is a cross-sectional view of the label 201 cut at the position of arrow A-A in FIG. 8. FIG. 10 is a front view showing a state where the cover layer 220 is removed from the label 201.

[0059] The label 201 of the present embodiment is formed in a substantially square shape when viewed from the front side, and is used by being attached to an article such as a product during a sales promotion campaign or the like. The label 201 has a main body layer 210 and a cover layer 220, and a part of the cover layer 220 can be easily peeled off and opened from the main body layer 210. In addition, the front side (or the front surface side) in FIG. 8 and the protective layer 225 side in FIG. 9 are referred to as the front side, and the back side (or the back surface side) in FIG. 8 and the separator layer 214 side in FIG. 9 are referred to as the back side.

[0060] The main body layer 210 has, from the front side, an information display portion 212, a main body side base material layer 211, a label attachment-concealing adhesive layer 213, and a separator layer 214 laminated in this order.

[0061] It is desirable to use a resin film, a resin sheet, paper, etc. for the main body side base material layer 211, but the material may be any kind. For example, as the main body side base material layer 211, inkjet paper, high-quality paper, kraft paper, copying paper, glassine paper, rayon paper, coated paper, synthetic paper, paper laminated with a resin film, NIP high-quality paper, stretched polypropylene, polyethylene terephthalate, stretched polystyrene, polyvinyl chloride, etc. can be used. By forming the main body side base material layer 211 using the above materials, the label 201 has flexibility and can be properly attached even if the surface of the article to be attached is a curved surface. Also, it is desirable to use a white or light-colored material close to white for the main body side base material layer 211 in order to improve the visibility of the display content of the information display section 212. The thickness of the main body side base material layer 211 is desirably, for example, 10 μm or more and 100 μm or less. If it is less than 10 μm, wrinkles etc. are likely to occur at the label manufacturing stage and it is difficult to process, and if it is 100 μm or more, the label peels off depending on the shape of the article to which it is attached.

[0062] The information display section 212 displays various visible information. The display content displayed by the information display section 212 may be any kind, for example, it may be a character code indicating specific information by a combination of character strings, it may be a bar code, or it may be a two-dimensional code. Also, the display content displayed by the information display section 212 may be fixed information that does not change depending on the label, or may be unique variable information (ID: Identification) with different contents for each label. Here, as the variable information, for example, a serial number for campaign application etc. can be exemplified. The information display section 212 can be formed by printing on the front side of the main body side base material layer 211. In this embodiment, the information display section 212 displays unique information by a two-dimensional code. The thickness of the information display section 212 is desirably, for example, 0.1 μm or more and 40 μm or less. If it is less than 0.1 μm, printing streaks etc. occur and the readability deteriorates, and if it is 40 μm or more, blocking due to poor drying is likely to occur.

[0063] The information such as the two-dimensional code displayed by the information display unit 212 is covered by the cover layer 220 described later and cannot be visually recognized from the outside when the label 201 is attached to an article such as a product and displayed in a store or the like. Hereinafter, information that is hidden in a specific situation, such as the two-dimensional code displayed by this information display unit 212, will also be referred to as hidden information. Note that, as will be described later, by peeling off and opening a part of the cover layer 220, the information such as the two-dimensional code displayed by the information display unit 212 can be easily obtained.

[0064] Also, the front side of the information display unit 212 is not joined to the back surface of the cover-side base material layer 221. When the display on the main body-side base material layer 211 is a barcode, a two-dimensional code, or the like, it is desirable to use black or dark-colored printed display in order to improve recognition by a scanner, a camera, or the like.

[0065] The label-attaching hidden adhesive layer 213 is laminated on the back side of the main body-side base material layer 211 and is composed of an adhesive for attaching to an article such as a product when using the label 201. Further, the label-attaching hidden adhesive layer 213 has a function as an information hiding portion that prevents the hidden information displayed by the information display unit 212 from being obtained from either the front side or the back side through the label 201. The label-attaching hidden adhesive layer 213 contains a black pigment and is formed in black in order to have the function (hiding property) as this information hiding portion. Thereby, the light transmittance of the label-attaching hidden adhesive layer 213 at a wavelength of 500 nm, which is a typical visible light wavelength, is equal to or lower than the light transmittance of the portion (for example, ink, toner, etc.) that forms the hidden information displayed by the information display unit 212, ensuring the hiding property. The thickness of the label-attaching hidden adhesive layer 213 is desirably, for example, 5 μm or more and 40 μm or less. This is because if it is less than 5 μm, the adhesive force with the article to be attached is insufficient and it is likely to peel off, and if it is 40 μm or more, the adhesive is likely to protrude from the label and blocking is likely to occur.

[0066] For the formation of the concealed adhesive layer 213 for label attachment, ordinary adhesives with adhesive properties can be widely used. As solvent-based adhesives, rubber-based ones such as NR, SBR, IR, and CR are mainstream, but emulsion-type acrylic adhesives can also be used. In addition, there are silicone-based, polyvinyl ether-based, etc., and any of them can be used. A hot-melt adhesive may also be used. By including a black pigment that imparts concealment (light impermeability) to these materials, the concealed adhesive layer 213 for label attachment can be obtained.

[0067] The separator layer 214 is a member also known as a so-called release paper, release sheet, etc., and is laminated on the back side of the concealed adhesive layer 213 for label attachment. The separator layer 214 protects the concealed adhesive layer 213 in the unused state, that is, in the label 201 before being attached to an article, so that the concealed adhesive layer 213 for label attachment does not inadvertently stick to other articles, etc. In the figure, the separator layer 214 is shown as a single layer, but the separator layer 214 may be configured, for example, as a laminate of a base material layer and a release layer. The separator layer 214 is peeled off and removed when the label 201 is attached to an article. As the separator layer 214, the same material as the main body side base material layer 211 can be used, and a material obtained by adding silicone oil or silicone acrylate to ultraviolet curable (UV type) ink for offset printing can be applied to the surface forming the concealed adhesive layer 213 for label attachment to impart releasability. Also, a normal thermosetting release ink may be applied to a material similar to the main body side base material layer 211 to form the separator layer 214. The thickness of the separator layer 214 is desirably, for example, 25 μm or more and 300 μm or less. This is because if it is less than 25 μm, the separator layer is likely to break during the attachment process with a labeling machine, and if it is more than 300 μm, the label cannot be fed out from the release plate during the attachment process with a labeling machine.

[0068] The cover layer 220 is partially joined to the front side of the main body layer 210 using a cover joining layer 230, which will be described later. The cover layer 220 has, from the front side, a protective layer 225, a hologram layer 223, a hologram joining layer 224, a printing layer 222, a cover-side base material layer 221, and a hidden printing layer 226 laminated in this order.

[0069] It is desirable to use a resin film, a resin sheet, paper, etc. for the cover-side base material layer 221, but the material may be any kind. For example, as the main body-side base material layer 211, inkjet paper, high-quality paper, kraft paper, copying paper, glassine paper, rayon paper, coated paper, synthetic paper, paper laminated with a resin film, NIP high-quality paper, stretched polypropylene, polyethylene terephthalate, stretched polystyrene, polyvinyl chloride, etc. can be used. The cover-side base material layer 221 may use the same material as the main body-side base material layer 211. The cover-side base material layer 221 does not have light transmittance to the extent that the display of the information display portion 212 can be visually recognized under normal environmental conditions. Therefore, in a state where the cover layer 220 covers the main body layer 210, usually, the display of the information display portion 212 cannot be visually recognized. Depending on the printing color of the printing layer 222 formed thereon, it is usually desirable to use a white or light-colored material close to white for the cover-side base material layer 221 in order to make the color development of the printing layer 222 good. The thickness of the cover-side base material layer 221 is desirably, for example, 15 μm or more and 100 μm or less. If it is less than 15 μm, it is difficult to peel the cover-side base material when acquiring hidden information, and if it is 100 μm or more, the label peels off depending on the shape of the article to which it is attached.

[0070] The printing layer 222 is provided on the front side of the cover-side base material layer 221. The printing layer 222 has, for example, characters representing a product name or a campaign printed and displayed. In this embodiment, characters representing a campaign and an explanation, and (▽OPEN) indicating the position to open the cover layer 220 are displayed by printing. The thickness of the printing layer 222 is desirably, for example, 0.1 μm or more and 40 μm or less. If it is less than 0.1 μm, color unevenness is likely to occur, and if it is 40 μm or more, blocking due to poor drying is likely to occur.

[0071] When the detection light from a point light source arranged at a distance from the incident surface is incident on the hologram layer 223, the hologram layer 223 is recorded with the first interference fringes that are converted into a Fourier transform hologram reproduction image and the second interference fringes that are converted into a volume reflection type hologram reproduction image when light from a light source that does not specify the irradiation direction is incident on the incident surface, with the two overlapping. Here, the "incident surface" is the incident surface of the hologram layer 223. More specifically, it is the front surface of the hologram layer 223. However, since the hologram layer 223 is not exposed to the outside, substantially, the "incident surface" is the surface of the protective layer 225. Also, the "light from a light source that does not specify the irradiation direction" means the light that reaches the hologram layer 223 in a situation where the light source indoors or outdoors is not managed without irradiating light from a specific direction in order to visually recognize the hologram. For example, diffused light that reaches the hologram layer 223 from various directions can be exemplified. Also, when the label 201 is attached to an article such as a product, in the state where the article such as the product is held in the hand, the positional relationship with the light source is not specified, and it is assumed that light reaches the label 201 from various directions. Such a case can also be cited as an example of the state where "light from a light source that does not specify the irradiation direction is incident on the incident surface". The configuration of the hologram layer in which the first interference fringes converted into a Fourier transform hologram reproduction image and the second interference fringes converted into a volume reflection type hologram reproduction image are superimposed, and the manufacturing method are disclosed in Japanese Patent Application Laid-Open No. 2022-177038. The hologram layer 223 of the present embodiment has the same configuration as that of Japanese Patent Application Laid-Open No. 2022-177038 and is manufactured by the same manufacturing method, and detailed description here is omitted. The thickness of the hologram layer 223 is desirably, for example, 1 μm or more and 30 μm or less. This is because if it is less than 1 μm, the luminance of the hologram becomes dark and the reproduction image becomes difficult to visually recognize, and if it is 30 μm or more, the hologram material protrudes from the label and blocking is likely to occur.

[0072] Further, in the hologram layer 223 of the present embodiment, when observed under a light source that does not specify the irradiation direction, if observed within a predetermined angular range from the normal direction of the label, the volume reflection hologram reproduced image is not displayed outward, and if observed from a range exceeding the predetermined angular range from the normal direction of the label, the second interference fringes are formed so that the volume reflection hologram reproduced image is displayed outward.

[0073] The hologram layer 223 basically has light transmissibility, and the printed display of the printing layer 222 can be visually recognized through the hologram layer 223. Further, in a situation where the hologram reproduced image is visually recognized, since the hologram reproduced image also has transparency, the printing layer 222 can be visually recognized through the hologram reproduced image, but due to the presence of the hologram reproduced image, the printing layer 222 cannot be clearly visually recognized. The appearance of the hologram layer 223 will be described later.

[0074] The hologram bonding layer 224 is laminated between the printing layer 222 and the hologram layer 223, and is a layer that bonds (adheres) the hologram bonding layer 224 and the printing layer 222. As the hologram bonding layer 224, for example, it can be a heat seal layer that exhibits adhesiveness when heated and pressurized. The hologram bonding layer 224 needs to have light transmissibility (transparency) in order to make the printed display of the printing layer 222 visible through the hologram layer 223. Further, the hologram bonding layer 224 can be configured using an adhesive similar to the label - attaching hidden adhesive layer 213, but it is necessary to have light transmissibility. The hologram bonding layer 24 can be configured using a material containing cations. For example, the hologram bonding layer 24 can be configured using an emulsion - type acrylic - based material, a rubber - based material, a silicon - based material, or the like. The thickness of the hologram bonding layer 224 is desirably, for example, 0.1 μm or more and 20 μm or less. If it is less than 0.1 μm, sufficient adhesive force with the printing layer 222 cannot be obtained, and if it is more than 20 μm, blocking is likely to occur during the hologram manufacturing process.

[0075] The protective layer 225 is provided on the front side of the hologram layer 223 and is a transparent layer that protects the hologram layer 223. As the protective layer 225, for example, an overprint layer (OP layer) formed by applying overprint varnish can be used. The thickness of the protective layer 225 is desirably, for example, 0.1 μm or more and 20 μm or less. If it is less than 0.1 μm, the abrasion resistance decreases and the hologram layer 223 is likely to be damaged. If it is 20 μm or more, the transparency is impaired.

[0076] The concealed printing layer 226 is formed on the back side of the cover-side base material layer 221, more specifically, on the back surface of the cover-side base material layer 221 in the present embodiment. The concealed printing layer 226 functions as an information concealment part that prevents the concealed information displayed by the information display part 212 from being known from either the front side or the back side through the label 201. The concealed printing layer 226 is printed with ink containing a black pigment in order to have the function (concealability) as this information concealment part. In FIG. 9, the concealed printing layer 226 is shown as being provided over the entire back surface of the cover-side base material layer 221. However, the concealed printing layer 226 may be provided at least at a position overlapping the information display part 212 in the thickness direction of the label 201. Also for the concealed printing layer 226, the light transmittance at a wavelength of 500 nm, which is a typical wavelength of visible light, is equal to or lower than the light transmittance of the part (for example, ink, toner, etc.) that forms the concealed information displayed by the information display part 212, ensuring concealability. The thickness of the concealed printing layer 226 is desirably, for example, 0.1 μm or more and 40 μm or less. If it is less than 0.1 μm, color unevenness is likely to occur. If it is 40 μm or more, blocking due to poor drying is likely to occur.

[0077] Also, the concealed printing layer 226 does not necessarily have to be solid printing as long as it has a concealment property that can prevent the concealed information displayed by the information display unit 212 from being known from either the front or the back side through the label 201. Different from the concealed adhesive layer 213 for label attachment shown above, the concealed printing layer 226 can be printed in a desired pattern. Therefore, for example, when the concealed information of the information display unit 212 is a two-dimensional code, the concealed printing layer 226 may be provided as a pattern, a design, etc. at a position overlapping the two-dimensional code. In this case, even if the two-dimensional code (concealed information) of the information display unit 212 and the printing pattern or design of the concealed printing layer 226 are observed through the front or the back side of the label 201, the concealed information cannot be known as the original correct information (the two-dimensional code cannot be read correctly) because the concealed information of the information display unit 212 and the printing pattern, etc. of the concealed printing layer 226 overlap. In the present embodiment, since the manufacturing is easy, the concealed printing layer 226 is provided as solid printing over the entire back surface of the cover-side base material layer 221.

[0078] As described above, the information concealment portions (213, 226) only need to have a concealment property that can prevent the concealed information displayed by the information display unit 212 from being known from either the front or the back side through the label 201. Therefore, when the information concealment portions (213, 226) are uniformly formed as in the present embodiment, it is necessary that the light transmittance be equal to or lower than the light transmittance of the portion (for example, ink, toner, etc.) that forms the concealed information displayed by the information display unit 212. Alternatively, when the information concealment portions (213, 226) are in the form of a pattern or a design, it is necessary that the light transmittance of the portion (for example, ink, toner, etc.) that forms the pattern or the design be equal to or lower than the light transmittance of the portion (for example, ink, toner, etc.) that forms the concealed information displayed by the information display unit 212.

[0079] In order to have a concealment property that can prevent the concealed information from being known from either the front or the back side through the label 201, it is desirable that the transmittance of the ink (or toner, transfer layer, etc.) itself used for the concealed printing layer 226 be equal to or lower than the light transmittance of the information displayed by the information display unit 212.

[0080] In the cover layer 220, in addition to the aforementioned cover-side base material layer 221, printing layer 222, hologram bonding layer 224, hologram layer 223, protective layer 225, and hidden printing layer 226, a primer layer may be disposed between the hologram bonding layer 224 and the hologram layer 223. The primer layer is not shown in the drawings and is omitted. The primer layer can be configured entirely or partially for each layer between the hologram bonding layer 224 and the hologram layer 223. The adhesive force between the hologram bonding layer 224 and the hologram layer 223 is improved by providing the primer layer. Also, the durability of the laminated structure state of the cover layer 220 before being laminated with the main body layer 210 or the cover bonding layer 230 is improved by providing the primer layer.

[0081] The cover bonding layer 230 is a layer that bonds the main body layer 210 and the cover layer 220, and is provided at a position that does not overlap with the information display portion 212. As shown in FIG. 10 in this embodiment, the cover bonding layer 230 is formed in a substantially U shape along three sides of a square that surrounds the information display portion 212 when viewed from the front side. Since the cover bonding layer 230 is provided at a position that does not overlap with the information display portion 212, light transmissivity is not required, and it can be configured using an adhesive similar to the hidden adhesive layer 213 for label attachment. The thickness of the cover bonding layer 230 is desirably 5 μm or more and 40 μm or less. If it is less than 5 μm, the adhesive force with the main body-side base material layer 211 and the hidden printing layer 226 may be insufficient, and the cover layer 220 may be unintentionally peeled off from the main body layer 210. If it is 40 μm or more, the adhesive may protrude from the label and blocking is likely to occur.

[0082] Further, the cover layer 220 has a planned cutting line 227 that facilitates cutting near the boundary between the area where the cover bonding layer 230 is provided and the area where it is not provided. The planned cutting line 227 may be a perforation where the cut portion and the non-cut portion are linearly continuous, or may be a partial cut that cuts halfway through the thickness direction of the cover layer 220. Also, the planned cutting line 227 may be a perforation where the cut portion and the non-cut portion are linearly continuous, and the cut portion may be in a state where it is cut down to the main body layer 210. In the present embodiment, the planned cutting line 227 is a perforation that extends from one end of the cover layer 220 where the cover bonding layer 230 is not provided along the side opposite to this side to a position near the cover bonding layer 230 provided along this side without overlapping the cover bonding layer 230.

[0083] FIG. 11 is a diagram showing a state in which the cover layer 220 is cut along the planned cutting line 227 and the central portion of the cover layer 220 is peeled off and opened. As shown in FIG. 11, by cutting along the planned cutting line 227, the central portion of the cover layer 220 in the area where the cover bonding layer 230 is not provided can be peeled off and opened, and the display on the information display portion 212 can be made visible. Even if a part of the cover layer 220 is peeled off and opened, one end is maintained in a state of being joined to the main body layer 210 by the cover bonding layer 230, so it is not separated from the main body layer 210. A consumer who has purchased a product or the like can open a part of the cover layer 220 as shown in FIG. 11 and use information such as a two-dimensional code displayed on the information display portion 212.

[0084] Also, the label 201 has cut portions 201a that are cut at the same positions on both the main body layer 210 and the cover layer 220. In the present embodiment, the cut portions 201a are provided at each of the four corners of the label 201 when viewed from the front side. When trying to peel off the label 201 attached to a product or the like, the label 201 can be torn starting from the cut portions 201a, preventing it from being reattached. Further, if the planned cutting line 227 is a perforation where the cut portion and the non-cut portion are linearly continuous and the cut portion is in a state where it is cut down to the main body layer 210, the label 201 can be torn starting from the planned cutting line 227, preventing it from being reattached.

[0085] Next, the appearance of the hologram layer 223 will be described. FIG. 12 is a diagram showing the appearance when the label 201 is viewed within a predetermined angular range from the normal direction of the label 201 under observation by a light source whose irradiation direction is not specified. As shown in FIG. 12, when viewed within a predetermined angular range (within the range of ±θ in FIG. 12) from the normal direction of the label 201 under observation by a light source whose irradiation direction is not specified, neither the hologram image from the first interference fringes nor the second interference fringes of the hologram layer 223 can be visually recognized. Therefore, the hologram layer 223 is observed as transparent, and the display of the printing layer 22 is visible. The information displayed on the printing layer 222 is product names, campaign information, etc., and it is important that it is easy for consumers to see. Therefore, it is important that the display of the printing layer 222 can be visually recognized without being obstructed by the hologram layer 223 when the label 201 is viewed within a predetermined angular range from the normal direction of the label 201 under observation by a light source whose irradiation direction is not specified. Note that the range of ±θ shown in FIG. 12 where the hologram image is not visually recognized can be appropriately changed according to the setting of the hologram layer 223.

[0086] Note that the volume reflection type hologram only appears to the human eye as if it has disappeared even though the display of the printing layer 222 is visible, and it actually exists. That is, when the angle of observing the article to which the label 201 is attached is changed, the volume reflection type hologram can be visually recognized when observed from the direction that matches the angle at which the hologram reproduction image is visible, and it is difficult to visually recognize or is not visually recognized and appears to the human eye as if it has disappeared when observed from a direction outside the angular range where the hologram reproduction image is visible. The range of ±θ shown in FIG. 12 in the above example is the angular range that is outside the angular range where the hologram reproduction image is visible.

[0087] Also, here, for the sake of easy understanding, an example was given and explained where, when the label 201 is viewed within a predetermined angular range from the normal direction of the label 201 under observation by a light source without specifying the irradiation direction, the hologram layer 223 is observed to be transparent. However, the central direction in the direction where the label 201 cannot be visually recognized under observation by a light source without specifying the irradiation direction (in the above example, the normal direction of the label 201 was exemplified) can be appropriately changed. The angle at which the hologram reproduced image can be visually recognized can be appropriately set during replication (manufacture), and can be arbitrarily set according to the situation where the label 201 is used and the article to which the label 201 is attached, etc. For example, contrary to the above example, that is, a configuration may be adopted in which the volume reflection type hologram reproduced image is observed within an angular range close to the normal direction of the label 201, and the volume reflection type hologram reproduced image is not observed when observed from a direction at a large angle from the normal direction of the label 201.

[0088] Also, as described above, in the label 201 of the present embodiment, there is a predetermined angular range (±θ in the example of FIG. 12) in which only the printing layer 222 is observed without observing the volume reflection type hologram reproduced image of the hologram layer 223. Regarding this predetermined angular range in which only the printing layer 222 is observed without observing the volume reflection type hologram reproduced image, it can be appropriately set during replication (manufacture), and can be arbitrarily set according to the situation where the label 201 is used and the article to which the label 201 is attached, etc. For example, when the label 201 is attached to a flat surface as shown in FIG. 12, for example, θ = 20 degrees to 60 degrees can be exemplified. Note that the specific example of the above angle is only an example and can be appropriately changed.

[0089] FIG. 13 is a view showing how the label 201 looks when observed from a range exceeding a predetermined angular range from the normal direction of the label 201 under observation by a light source that does not specify the irradiation direction. In FIG. 13 and FIG. 14 described later, a state where the label 201 is attached to the transparent article 100 is shown. Examples of the transparent article 100 include liquid containers such as plastic bottles and glass bottles, but are not limited thereto. As shown in FIG. 13, when observed from a range exceeding a predetermined angular range from the normal direction of the label 201 under observation by a light source that does not specify the irradiation direction, the volume reflection hologram reproduction image H2 reproduced by the second interference fringes overlaps the display of the printing layer 222 and is visually recognized. Since this volume reflection hologram reproduction image H2 is visible under observation by a light source that does not specify the irradiation direction, that is, under normal ambient light, it can be easily confirmed that the label 201 is genuine, and the forgery prevention effect can be enhanced.

[0090] The authenticity determination effect and forgery prevention effect by the above volume reflection hologram reproduction image H2 are easily and surely exhibited. However, a person with malicious intent having hologram manufacturing technology may be able to forge, and there is a possibility that authenticity determination may become difficult. Therefore, in the label 201 of the present embodiment, in order to further enhance the authenticity determination effect and forgery prevention effect, the Fourier transform hologram reproduction image H1 (see FIG. 14) reproduced by the first interference fringes can be utilized.

[0091] FIG. 14 is a diagram showing how the detection light from a point light source arranged at a distance from the incident surface is incident on the label 201. As shown in FIG. 14, the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes overlaps with the display of the printing layer 222 and is visually recognized by the detection light irradiated from the point light source LS. Further, as shown in FIG. 14, the display of the printing layer 222 is difficult to be visually recognized by the human eye while the point light source LS is being irradiated. This is because the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes is more emphasized than the printing layer 222. By visually recognizing this Fourier transform hologram reproduction image H1, it is possible to confirm that it is an authentic product. This Fourier transform hologram reproduction image H1 can be visually recognized only when the detection light from the point light source is incident on the label 201. Therefore, since it is not visually recognized in a normal observation environment, it is difficult to notice the existence of the Fourier transform hologram reproduction image H1 reproduced by the first interference fringes, and it is possible to further enhance the anti-counterfeiting effect. And because the anti-counterfeiting effect is high, the authenticity determination effect, that is, the accuracy of being an authentic product becomes higher.

[0092] Also, the detection light from the point light source for observing the Fourier transform hologram reproduction image H1 is irradiated with light having a higher intensity than in a normal environment. When such light with a high intensity is irradiated on the label 201, in a label that does not have the function as an information concealment part exerted by the concealment adhesive layer 213 and the concealment printing layer 226 for label attachment of the present embodiment, there is a possibility that the concealed information such as the two-dimensional code displayed by the information display part 212 is observed through the transparent article 100 or projected onto other articles or the like.

[0093] However, the label 201 of the present embodiment has a function as an information hiding part exerted by the label - attaching - hiding adhesive layer 213 and the hidden printing layer 226. Therefore, even when light with a stronger intensity than in a normal environment irradiates the label 201, as shown in FIG. 14, from the back side of the article 100, only the shadow S in the outer - diameter shape of the label 201 is observed, and it is possible to prevent the hidden information such as the two - dimensional code displayed by the information display part 212 from being known. In the example of FIG. 14, the case where the detection light is irradiated onto the label 201 from the front side of the label 201 is illustrated. However, even when the detection light is irradiated onto the label 201 from the back side of the label 201 through the article 100, similarly, it is possible to prevent the hidden information such as the two - dimensional code displayed by the information display part 212 from being known.

[0094] As described above, according to the present embodiment, since the label 201 includes the label - attaching - hiding adhesive layer 213 and the hidden printing layer 226 as the information hiding part, even when light with a strong intensity irradiates the label 201, it is possible to prevent the hidden information such as the two - dimensional code displayed by the information display part 212 from being known through the label 201. Further, since the label 201 includes the label - attaching - hiding adhesive layer 213 and the hidden printing layer 226 as the information hiding part, when the detection light from the point light source LS arranged at a distance from the incident surface is made incident, the observation of the first interference fringes converted into the Fourier - transform hologram reproduction image can be safely performed while preventing the leakage of the hidden information.

[0095] (Modified form) Without being limited to the embodiments described above, various modifications and changes are possible, and they are also within the scope of the present disclosure.

[0096] (1) In the second embodiment, an example in which two layers, i.e., the concealing adhesive layer 213 for label attachment and the concealing printing layer 226, are provided as the information concealing portion has been described. However, the function as the information concealing portion is not limited to this, and it may be provided in only one of the concealing adhesive layer 213 for label attachment and the concealing printing layer 226. That is, for example, the function as the information concealing portion may be imparted only to the concealing adhesive layer 213 for label attachment, and the concealing printing layer 226 may be omitted. Conversely, for example, the function as the information concealing portion may be imparted only to the concealing printing layer 226, and a normal adhesive layer without concealability may be provided at a portion corresponding to the concealing adhesive layer 213 for label attachment.

[0097] (2) In the first embodiment or the second embodiment, an example in which the cover bonding layer 30 or the cover bonding layer 230 is formed in a substantially U shape along three sides of a square surrounding the information display portion 12 or the information display portion 212 when viewed from the front side has been described. However, the arrangement of the cover bonding layer 30 or the cover bonding layer 230 is not limited to this and can be changed as appropriate. FIGS. 15 and 16 are diagrams showing modified forms of the arrangement of the cover bonding layer 30 or the cover bonding layer 230. For example, the cover bonding layer 30 or the cover bonding layer 230 may be arranged along two opposing sides as shown in FIG. 15. Further, for example, the cover bonding layer 30 or the cover bonding layer 230 may be arranged along all four sides excluding the vicinity of one corner as shown in FIG. 16.

[0098] (3) In the first embodiment or the second embodiment, an example in which the label 1 or the label 201 has the cut portion 1a or the cut portion 201a has been described. However, the cut portion 1a or the cut portion 201a is not limited to this and may be omitted.

[0099] (4) In the first embodiment or the second embodiment, the information display unit 12 or the information display unit 212 has been described by taking an example of variable information for campaign application. However, it is not limited to this. For example, the information display unit 12 or the information display unit 212 may be fixed information or variable information used for authenticity determination. If the display of the information display unit 12 or the information display unit 212 is used for authenticity determination, in combination with the authenticity determination using the Fourier transform hologram reproduction image by the first interference fringes and the authenticity determination using the volume reflection type hologram reproduction image by the second interference fringes, a three-stage authenticity determination can be performed.

[0100] (5) In the first embodiment or the second embodiment, the cover layer 20 or the cover layer 220 has been described by taking an example in which a part of each can be peeled off and opened from the main body layer 10 or the main body layer 210, and also an example in which the cover layer 20 or the cover layer 220 does not separate from the main body layer 10 or the main body layer 210. However, it is not limited to this. For example, the entire cover layer 20 or the cover layer 220 may be separable by being peeled off from the main body layer 10 or the main body layer 210, respectively.

[0101] (6) In the first embodiment or the second embodiment, even when the label 1 or the label 201 is pasted on a container having a curved surface such as a plastic bottle, an aluminum can, a steel can, or a bottle and observed, the Fourier transform hologram reproduction image formed by the first interference fringes of the printing layer 22 and the hologram layer 23, or the printing layer 222 and the hologram layer 223, and the volume reflection type hologram reproduction image formed by the second interference fringes can be recognized. Here, the curved surface refers to a form having curvature, circularity, or a curve. Even when the label 1 or the label 201 is pasted not only on a flat surface but also on a curved surface, it can be seen that there is a display on the printing layer 22 or the printing layer 222, respectively, and the Fourier transform hologram reproduction image formed by the first interference fringes can be observed, and the volume reflection type hologram reproduction image formed by the second interference fringes can be observed. Furthermore, since the information in the printing layer 22, the information display unit 12, or the printing layer 222, the information display unit 212 is two-dimensional code, unique information, or variable information, the authenticity determination function by machine authentication can also be imparted to the curved surface. Therefore, three types of authenticity determination functions, namely, the Fourier transform hologram reproduction image, the volume reflection type hologram reproduction image, and machine authentication, can be provided on one medium, the label 1 or the label 201. Although there are three levels of authenticity determination functions by three types, authentication by two levels using two of them may also be used. Since it can be pasted on a curved surface, the range of applications for brand protection can be expanded. Furthermore, among containers and products, the label 1 or the label 201 can be pasted anywhere, and the information that is intended to be conveyed to general consumers and purchasers can be made clear and easy to understand. At the same time, it has both effects of protecting the product to be protected from forgery. There are various forms of containers and products in the world. Even if they are partially flat or have a curved surface, the label 1 or the label 201 in the first embodiment or the second embodiment can be pasted on an unspecified location of the container or the product, and forgery can also be prevented.

[0102] FIG. 17 is a view showing a state where label 1 or label 201 is attached to the curved surface of article 100. As shown in FIG. 17, when label 1 or label 201 is attached to the curved surface, θ = 90 degrees to 100 degrees can be exemplified. That is, when label 1 or label 201 is attached to the curved surface, the range in which only the printing layer 22 or the printing layer 222 is observed without observing the volume reflection hologram reproduction image is, for example, the direction between +90 degrees (~100 degrees) and -90 degrees (~-100 degrees) with respect to the normal direction at an arbitrary position of label 1 or label 201 (the predetermined angular range in which only the printing layer 22 or the printing layer 222 is observed without observing the volume reflection hologram reproduction image can be exemplified as approximately 180 degrees to 200 degrees).

[0103] In addition, although the embodiments and the modified forms can be used in appropriate combination, detailed description thereof is omitted. Further, the present disclosure is not limited to each of the embodiments described above.

Explanation of Reference Numerals

[0104] 1, 201 Labels 1a, 201a Cut portions 10, 210 Body layers 11, 211 Body-side base material layers 12, 212 Information display portions 13, 213 Adhesive layers for attaching labels 14, 214 Separator layers 20, 220 Cover layers 21, 221 Cover-side base material layers 22, 222 Printing layers 23, 223 Hologram layers 24, 224 Hologram bonding layers 25, 225 Protective layers 26 Cutting planned line 226 Concealed printing layer 227 Cutting planned line 30, 230 Cover bonding layers 100 Articles

Claims

1. A main body layer having a main body side base material layer; An information display section provided on the front side of the main body side base material layer; a cover layer covering at least the information display unit and laminated on the main body layer in a form in which at least a portion of the cover layer is peelable; A label comprising: The cover layer is A cover side base material layer; A printed layer formed on the outer side of the cover-side base material layer; a hologram layer formed on the front side of the print layer; having The hologram layer is a label having a predetermined angle range in which, when observed with a light source that does not specify an irradiation direction, only the printing layer is observed and the volume reflection hologram reconstruction image of the hologram layer is not observed.

2. The label of claim 1, The hologram layer is a first interference fringe that is converted into a Fourier transform hologram reconstruction image when detection light from a point light source disposed apart from the incident surface is incident thereon; a second interference fringe that is converted into the volume reflection hologram reconstruction image when light from a light source with no specific irradiation direction is incident on the incident surface; and are recorded superimposed on each other, A label characterized by:

3. The label according to claim 2, the Fourier transform hologram reconstruction image is observed in a normal direction of the incident surface when the detection light from the point light source is irradiated from the normal direction of the incident surface; A label characterized by:

4. The label according to claim 1 or 2, The main body layer is An adhesive layer for attaching a label laminated on the back side of the main body side base material layer; a separator layer covering the label-attaching adhesive layer; To have A label characterized by:

5. The label according to claim 1 or 2, The cover layer is a hologram bonding layer that bonds the cover side base material layer and the printing layer to the hologram layer; a protective layer disposed on the outer surface of the hologram layer to protect the hologram layer; To have A label characterized by:

6. The label according to claim 1 or 2, a cover bonding layer that bonds the main body layer and the cover layer; The cover bonding layer is provided at a position not overlapping with the information display portion, the cover layer has a planned cutting line for facilitating cutting in the vicinity of a boundary between an area where the cover bonding layer is provided and an area where the cover bonding layer is not provided; A label characterized by:

7. The label according to claim 1 or 2, The body layer and the cover layer have cut portions cut at the same positions. A label characterized by:

8. A main body layer having a main body side base material layer; An information display section provided on the front side of the main body side base material layer; a cover layer covering at least the information display unit and laminated on the main body layer in a form in which at least a portion of the cover layer is peelable; A label comprising: The cover layer is A cover side base material layer; A printed layer formed on the outer side of the cover-side base material layer; a hologram layer formed on the front side of the print layer; having an information concealing section that is disposed at a position overlapping with the information display section in a thickness direction of the label and that prevents information displayed by the information display section from being seen through the label; a first interference fringe that is converted into a Fourier transform hologram reconstruction image when detection light from a point light source disposed apart from the entrance surface is incident thereon; The information hiding portion is a label that hides the information displayed by the information display portion even in a state in which the detection light is irradiated onto the position of the information display portion.

9. The label of claim 8, The hologram layer is The first interference pattern; and a second interference fringe that is converted into a volume reflection hologram reconstruction image when light from a light source with no specific irradiation direction is incident on the incident surface; and That is recorded, A label characterized by:

10. The label of claim 8, the information concealing portion includes a concealing printed layer formed on the back side of the cover-side base material layer and having concealing properties; A label characterized by:

11. The label of claim 8, The information concealing portion includes a label-attaching concealing adhesive layer having concealing properties and laminated on the back side of the main body-side base material layer; A label characterized by:

12. The label of claim 8, The cover layer is a hologram bonding layer that bonds the cover side base material layer and the printing layer to the hologram layer; a protective layer disposed on the outer surface of the hologram layer to protect the hologram layer; To have A label characterized by:

13. The label of claim 8, a cover bonding layer that bonds the main body layer and the cover layer; The cover bonding layer is provided at a position not overlapping with the information display portion, the cover layer has a planned cutting line for facilitating cutting in the vicinity of a boundary between an area where the cover bonding layer is provided and an area where the cover bonding layer is not provided; A label characterized by:

14. The label of claim 8, The body layer and the cover layer have cut portions cut at the same positions. A label characterized by:

Images