Information Concealment Card and Concealment Member Sheet

Abstract

To provide an information concealment card that can indicate that the concealing material has been peeled off if it has been peeled off and then pasted again.SOLUTION: An information concealment card 10 includes: a card substrate 1 where confidential information 5 is formed; and a concealing material 20 that is pasted on the card substrate 1 so as to conceal the confidential information 5. The concealing part 20 includes: a coated base material layer 4 to cover the confidential information 5; an adhesive layer 3 that is formed over the side of the card substrate 1 of the coated base material layer 4; and a coloring layer 7 that is formed over the opposite side to the side of the card substrate 1 of the coated base material layer 4. The concealing material 20 is divided into a concealing area 31 that is an area where the coloring layer 7 is formed and a transmission are 32 that is an area where the coloring layer 7 is not formed. The concealing material 20 is pasted on the card substrate 1 with the adhesive layer 3, and the surface of the side of the adhesive layer 3 of the coated base material 4 has mat-tone unevenness, and the surface of the side of the adhesive layer 3 of the coated base material 4 has a pattern printing part 8.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an information hiding card for circulating information in a hidden state and a hiding member sheet used for the information hiding card.

Background Art

[0002] Conventionally, a card has been used in which confidential information to be concealed is posted on the surface and the information is concealed by a predetermined method. The uses of the card are various. For example, it is used for scratch cards for lottery, gift cards, prepaid cards, POSA cards (registered trademark), electronic money cards, and the like.

[0003] For example, in the case of a POSA (Point of Sales Activation) card, in addition to the confidential information, a barcode for identifying each individual of the card is posted, and the PIN (Personal Identification Number) code posted on the target card becomes usable (activated) for the first time when a store clerk reads the barcode at the cash register and the payment of the purchaser who wishes to purchase is completed. The purchaser can obtain the PIN code described on the POSA card and use it as information having a monetary value by inputting the PIN code on the Internet. In the case of a POSA card, it is necessary to conceal the PIN code as confidential information until the time of sale so that the PIN code is not known to anyone other than the purchaser.

[0004] In the above-mentioned cards typified by POSA cards, etc., the confidential information is concealed by covering it with a concealment layer (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] When the card base material side of the concealment member including the concealment layer is an adhesive layer, it becomes possible to reattach it after peeling it off once. In this case, even if the confidential information is illegally peeked at, it is difficult to detect the illegality.

[0007] Therefore, an object of the present disclosure is to provide an information concealment card capable of grasping that the concealment member has been peeled off when the concealment member is peeled off and reattached.

MEANS FOR SOLVING THE PROBLEMS

[0008] To solve the above problems, in the present disclosure, An information concealment card having a card base material on which confidential information to be concealed is formed, and a concealment member attached to the card base material so as to conceal the confidential information, The concealment member is A covering base material layer for covering the confidential information, An adhesive layer formed by overlapping the surface of the covering base material layer on the card base material side, A colored layer formed by overlapping the surface of the covering base material layer on the side opposite to the card base material side, and having, The concealment member is divided into a concealment area which is an area where the colored layer is formed and a transmission area which is an area where the colored layer is not formed, and the concealment member is attached to the card base material by the adhesive layer, The surface of the covering base material layer on the adhesive layer side has a matte unevenness, Provided is an information concealment card having a pattern printing portion on the surface of the covering base material layer on the adhesive layer side.

[0009] Further, the information concealment card according to the present disclosure is As the confidential information, it has first confidential information and second confidential information whose width in a direction intersecting the longitudinal direction of the concealment member is smaller than the first confidential information. The width of the concealment area in a direction intersecting the longitudinal direction of the concealment member may be larger at a position overlapping the second confidential information than at a position overlapping the first confidential information.

[0010] Also, the information concealment card according to the present disclosure The first confidential information may be a two-dimensional code recording predetermined information.

[0011] Also, the information concealment card according to the present disclosure The second confidential information may be character information.

[0012] Also, the information concealment card according to the present disclosure The first confidential information may record the second confidential information.

[0013] Also, in the present disclosure A concealment member sheet having a plurality of concealment members for sticking to other media to make a predetermined range difficult to visually recognize, The concealment member A coating base material layer for covering confidential information which is information to be concealed, An adhesive layer formed by overlapping one surface of the coating base material layer, It has a coloring layer formed by overlapping the surface of the coating base material layer opposite to the adhesive layer, The concealment member is divided into a concealment area which is an area where the coloring layer is formed and a transmission area which is an area where the coloring layer is not formed, The surface of the coating base material layer on the adhesive layer side has a matte unevenness, A concealment member sheet having a pattern printing portion on the surface of the coating base material layer on the adhesive layer side is provided.

Advantages of the Invention

[0014] According to the present disclosure, when the concealment member is peeled off and reattached, it becomes possible to grasp that it has been peeled off.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0016] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. <1. Structure of Information Concealment Card> FIG. 1 is a diagram showing the structure of an information hiding card according to an embodiment of the present disclosure. Among them, FIG. 1(a) is a plan view seen from the front side of the information hiding card 10, FIG. 1(b) is a cross-sectional view corresponding to the line A-A in FIG. 1(a), and FIG. 1(c) is a cross-sectional view corresponding to the line B-B in FIG. 1(a). FIG. 2 is a plan view showing the details of the hiding member 20. In FIG. 2, similar to FIG. 1(a), the state seen from the front side of the information hiding card 10 is shown with a partial enlargement. Since the hiding member 20 is composed of a number of layers overlapping, in FIG. 2, it is shown decomposed into FIGS. 2(a) and 2(b). FIG. 3 is a cross-sectional view of the portion where the hiding member of the information hiding card according to the present embodiment is attached.

[0017] In FIGS. 1 to 3, 1 is a card base material, 3 is an adhesive layer, 8 is a pattern printing portion, 4 is a coating base material layer, 5 is confidential information, 7 is a coloring layer, 10 is an information hiding card, 20 is a hiding member, 31 is a hiding area, 32 is a transmission area, 33 is a gripping portion, and 40 is code information. In the example of FIG. 1, on the front side, except for the areas where the hiding member 20 and the code information 40 exist, it is shown in a plain state, but actually, various information such as characters and patterns can be printed. The size of the information hiding card 10 (card base material 1) can be set as appropriate, but for example, it can be set to the size defined by the general (ISO / IEC7810) or JIS (JIS6301). Specifically, the length of the long side (the left-right direction in FIG. 1(a)) can be 85.60 mm, and the length of the short side (the up-down direction in FIG. 1(a)) can be 53.98 mm.

[0018] In the cross-sectional views of FIGS. 1(b) and 1(c), for convenience of explanation, the thickness of each layer (in the vertical direction of the drawing) is drawn larger than the size of the information hiding card 10 (in the horizontal direction of the drawing). However, since the information hiding card 10 is in the shape of a card or a sheet, in reality, each layer is formed thinner. For example, in FIG. 1, the width (in the horizontal direction of the drawing) is several cm to several tens of cm, while the thickness (in the vertical direction of the drawing) is about several tens of μm to several hundreds of μm. In the layer structure shown in the cross-sectional views of FIGS. 1(b) and 1(c), there is actually no distinction between the top and the bottom. However, for convenience of explanation, the upper side of the drawing (the side of the covering base material layer 4) will be expressed as the upper layer, and the lower side of the drawing (the side of the card base material 1) will be expressed as the lower layer. Therefore, in FIGS. 1(b) and 1(c), the coloring layer 7 is the topmost layer and the card base material 1 is the bottommost layer. Also, in this specification, the surface having the confidential information as shown in FIG. 1(a) will be described as the front surface, and the other surface will be described as the back surface. However, in reality, either one can be the front surface and the other can be the back surface.

[0019] FIG. 2 is a plan view showing details of the hiding member 20. In FIG. 2, similar to FIG. 1(a), a partially enlarged view of the state seen from the front surface of the information hiding card 10 is shown. Since the hiding member 20 is composed of a number of layers overlapping each other, in FIG. 2, it is shown decomposed into FIGS. 2(a) and 2(b). FIG. 2(a) shows the coloring layer 7 shaded. FIG. 2(b) shows the relationship with the outer edge G of the coloring layer 7. FIG. 3 is a cross-sectional view of the hiding member attachment portion of the information hiding card according to this embodiment. In FIG. 3, different from FIG. 1, the four layers of the coloring layer 7 are shown individually, and all the layers of the hiding member 20 are shown. Among FIGS. 3, FIG. 3(a) is a cross-sectional view corresponding to the C-C line in FIG. 2, FIG. 3(b) is a cross-sectional view corresponding to the D-D line in FIG. 2, and FIG. 3(c) is a cross-sectional view corresponding to the B-B line in FIG. 1.

[0020] In FIG. 3, the lower side of the drawing is the side of the card substrate 1, and the upper side of the drawing is the side opposite to the card substrate 1. As shown in FIGS. 3(a) and 3(b), the concealing member 20 is on the side of the card substrate 1 of the coating substrate layer 4, and the adhesive layer 3 is laminated on the side of the coating substrate layer 4. Further, on the side of the coating substrate layer 4 opposite to the card substrate 1, a first concealing layer 7aa, a second concealing layer 7ab, a white layer 7b, and a pattern layer 7c are laminated in this order from the side of the coating substrate layer 4. The first concealing layer 7aa and the second concealing layer 7ab may be collectively referred to as the concealing layer 7a. The concealing layer 7a may be formed of any number of layers. For example, it may be composed of only one layer, or may be composed of three or more layers. In the present embodiment, the concealing layer 7a is composed of two layers, the first concealing layer 7aa and the second concealing layer 7ab.

[0021] Furthermore, as shown in FIGS. 3(a) to 3(c), the surface of the coating substrate layer 4 on the side of the adhesive layer 3 has a matte texture with irregularities, and the surface of the coating substrate layer 4 on the side of the adhesive layer 3 has a pattern printing portion 8. That is, the surface of the coating substrate layer 4 on the side of the adhesive layer 3 is matte processed and has a fine irregular shape. Specifically, irregularities are formed over the entire surface of one surface of the coating substrate layer 4 by the matte processing. Therefore, one surface of the coating substrate layer 4 has a rough matte texture. The average roughness of one surface of the coating substrate layer 4 having a matte texture is preferably Ra 0.5 or more and 1.2 or less, and more preferably Ra 0.7 or more and 1.0 or less.

[0022] Furthermore, a pattern printing portion 8 is formed on this surface having a fine irregular shape by printing. As the pattern printing portion 8, any pattern can be formed. The pattern printing portion 8 is a portion that becomes visible when the concealing member 20 is illegally peeled off and reattached. For this reason, the pattern printing portion 8 is preferably formed of a pattern that can indicate that it has been illegally peeled off. For example, a character pattern such as "VOID" can be formed by printing.

[0023] On the front surface of the card substrate 1 (the upper surface in FIGS. 1(b) and 1(c)), confidential information 5 is formed in a predetermined area, which is a confidential information area. Specifically, the confidential information 5 is formed by printing. The confidential information 5 is preferably individual information that varies from card to card. The formation of the variable confidential information 5 can be performed by a known printing method such as inkjet printing or electrophotographic printing. The confidential information area where the confidential information 5 is formed is covered by a shielding member 20 so as to be concealed and difficult to visually recognize from the front surface of the information shielding card 10.

[0024] In the present embodiment, as will be described later, the area where the first confidential information 5a is formed is defined as the first confidential information area 35a, and the area where the second confidential information 5b is formed is defined as the second confidential information area 35b (see FIG. 2(b)). Specifically, the first confidential information area 35a is a rectangular area that includes all of the first confidential information 5a, and the second confidential information area 35b is a rectangular area that includes all of the second confidential information 5b.

[0025] The first confidential information 5a is information that requires a certain length in a direction intersecting the longitudinal direction of the shielding member 20. The intersecting direction is typically an orthogonal direction. In the present embodiment, a two-dimensional code is used as the first confidential information 5a. The two-dimensional code requires a certain length in both the vertical and horizontal directions (the vertical and horizontal directions in FIG. 1(a)). Therefore, it also requires a certain length in the direction intersecting the longitudinal direction of the shielding member 20 (the vertical direction in FIG. 1(a)). In the present embodiment, character information is used as the second confidential information 5b. The character information may be a single character or a character string of two or more characters. When the character information is arranged in a row along the longitudinal direction, as long as it is within the visible range, a length of one character is sufficient. Therefore, in the direction intersecting the longitudinal direction of the shielding member 20, it does not require as much length as the first confidential information 5a.

[0026] The concealing member 20 is laminated in the order of the coloring layer 7, the covering base material layer 4, and the adhesive layer 3 from the outer surface side (the front side in Fig. 1(a), the upper side in Figs. 1(b) and (c)). Although details will be described later, in this embodiment, the coloring layer 7 has a four-layer structure of a first concealing layer 7aa, a second concealing layer 7ab, a white layer 7b, and a pattern layer 7c. Among these, the four layers of the first concealing layer 7aa, the second concealing layer 7ab, the white layer 7b, and the pattern layer 7c included in the coloring layer 7 have the same coated area. In Figs. 1(b) and (c) and Fig. 4(b), to avoid making the figure complicated, they are collectively shown as the coloring layer 7.

[0027] The covering base material layer 4 is a base material layer for covering the confidential information area. The adhesive layer 3 is formed over substantially the entire surface of the covering base material layer 4. The first concealing layer 7aa, the second concealing layer 7ab, the white layer 7b, and the pattern layer 7c included in the coloring layer 7 do not necessarily have to be formed in the same area. However, by forming them in the same area, each layer can be printed using the same pattern plate, and the manufacturing efficiency can be improved.

[0028] The concealing member 20 is divided into a concealing area 31 and a transmission area 32 in a plan view. Specifically, the concealing member 20 is divided into a concealing area 31, which is the area where the coloring layer 7 is formed, and a transmission area 32, which is the area where the coloring layer 7 is not formed. The concealing area 31 is the area where the coloring layer 7 is formed. In particular, it is the area concealed by the concealing layer 7a included in the coloring layer 7. The area other than the concealing area 31 in the concealing member 20 is the transmission area 32 that transmits light. As shown in Fig. 1(a), the transmission area 32 has a substantially U-shaped shape as a whole. When assuming a rectangle composed of three sides of the U-shaped outer edge and the other one side of the transmission area 32, the adhesive layer 3 is not formed in the portion protruding from the one side other than the U-shaped outer edge of the transmission area 32. This protruding portion becomes the gripping portion 33 when opening the concealed portion.

[0029] As shown in FIGS. 1(b) and 1(c), in the information hiding card 10, a coloring layer 7 is disposed at a position overlapping the confidential information 5. The hidden area 31 where the coloring layer 7 is formed includes the confidential information area 35 (the first confidential information area 35a and the second confidential information area 35b: see FIG. 2(b)) where the confidential information 5 (the first confidential information 5a and the second confidential information 5b) is formed. In the present embodiment, the coloring layer 7 serves to hide the confidential information 5.

[0030] As shown in FIGS. 1(b) and 1(c), in the transmission area 32, the coloring layer 7 does not exist. Note that printing of characters, patterns, etc. on the front and back surfaces of the card base material 1 can be performed by known printing methods such as offset printing, gravure printing, screen printing, and inkjet printing.

[0031] In FIG. 2(a), the outer edge of the coloring layer 7 is shown by a solid line. Among these, two edges (the upper side and the lower side in FIG. 2) extending in the longitudinal direction of the hiding member 20 are line-symmetric to each other. Among the outer edges of the coloring layer 7, the edges extending in the longitudinal direction of the hiding member 20 are composed of two parallel linear line segments and a curve connecting these two line segments. In FIG. 2(a), the coloring layer 7 is shown shaded. In the present embodiment, the first hiding layer 7aa, the second hiding layer 7ab, the white layer 7b, and the pattern layer 7c that constitute the coloring layer 7 are all formed within the same area.

[0032] The first hiding layer 7aa and the second hiding layer 7ab are formed to hide the confidential information 5 formed in the confidential information area 35. Therefore, they are formed by applying ink containing a highly hiding pigment. The white layer 7b is formed to hide the second hiding layer 7ab so as to be difficult to visually recognize. The pattern layer 7c is a layer for forming patterns such as pictures and characters on the white layer 7b. Patterns formed on the pattern layer 7c allow pictures and characters to be visually recognized from the front side of the information hiding card 10. The pattern layer 7c serves to further enhance the hiding property of the confidential information 5 and to emphasize the presence of the hiding member 20 to the user.

[0033] As is clear from comparing FIGS. 3(a) and 3(b), the width in the direction intersecting the longitudinal direction of the shielding member 20 of the coloring layer 7 (the left-right direction in FIG. 3) is larger at the position covering the first confidential information 5a than at the position covering the second confidential information 5b. For this reason, when the shielding member 20 is rectangular and the width of the shielding member 20 in the direction intersecting the longitudinal direction of the shielding member 20 is constant, the width in the direction intersecting the longitudinal direction of the shielding member 20 of the transmission region 32 (the left-right direction in FIG. 3) is smaller at the position covering the first confidential information 5a than at the position covering the second confidential information 5b.

[0034] In the present embodiment, a two-dimensional code is used as the first confidential information 5a. Since the two-dimensional code corresponds to machine reading and requires a certain length in each of the two-dimensional vertical and horizontal directions, it is necessary to form it with a certain length in each of the two-dimensional vertical and horizontal directions also on the card base material 1. On the other hand, since various information is printed in a narrow space on the card base material 1, there is a desire to make the area of the shielding member 20 somewhat small. Therefore, on the two-dimensional code which is the first confidential information 5a, in order to expand the coloring layer 7 while suppressing the width in the direction intersecting the longitudinal direction of the shielding member 20, as shown in FIG. 3(a), the width of the transmission region 32 becomes relatively narrow.

[0035] Also, in the present embodiment, visible character information is used as the second confidential information 5b. When arranging characters in a row, for one direction, the width for one character is sufficient. Therefore, when forming the second confidential information 5b as a character string arranged in the longitudinal direction of the shielding member 20 on the card base material 1, the coloring layer 7 can be made narrow even if the width in the direction intersecting the longitudinal direction of the shielding member 20 is suppressed. For this reason, as shown in FIG. 3(b), the width of the transmission region 32 can be made relatively wide.

[0036] The confidential information area 35 is an area where confidential information is formed. As described above, in the present embodiment, there are a first confidential information area 35a and a second confidential information area 35b. In both cases, in FIG. 2(b), it is a rectangular area indicated by a two-dot chain line.

[0037] In the example of Fig. 1(a), code information 40 is also formed in addition to the locations where the concealment member 20 is formed. Fig. 1(a) shows an example where a barcode, which is a one-dimensional code, is formed as the code information 40, but a two-dimensional code such as a QR code (registered trademark) may also be used. The formation of the code information 40, which is variable information, can be carried out by known printing methods such as inkjet printing and electrophotographic printing, similar to the concealment information 5. The code information 40 records card identification information that can identify the individual of the information concealment card 10.

[0038] <2. Configuration of Each Layer> The card base material 1 serves as the card body of the information concealment card 10. Various materials can be applied as the card base material 1 according to the application. For example, any of natural fiber paper, coated paper, tracing paper, plastic film, etc. may be used, and it may be appropriately selected according to the application. In the case of a plastic film, examples include polyester-based resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide-based resins such as nylon 6, polyolefin-based resins such as polyethylene, polypropylene, and polymethylpentene, vinyl-based resins such as polyvinyl chloride, acrylic-based resins such as polymethyl methacrylate, polycarbonate, cellophane, and cellulose-based films such as cellulose acetate. The card base material 1 may be a copolymer resin mainly composed of these resins, or a mixture (including polymer alloys), or a laminate composed of multiple layers.

[0039] The card base material 1 may be subjected to adhesion-promoting treatments such as corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called anchor coat, adhesion promoter, or easy adhesive) coating treatment, preheating treatment, dust removal treatment, vapor deposition treatment, alkali treatment, etc. on its surface. Further, additives such as fillers, plasticizers, colorants, and antistatic agents may be added as necessary.

[0040] The adhesive layer 3 is a layer for attaching the concealment member 20 to the side of the card base material 1. As the adhesive layer 3, an acrylic adhesive is most preferable, but a natural rubber-based adhesive, a synthetic rubber-based adhesive, a silicone rubber-based adhesive, etc. may also be used. The coating amount and coating thickness of the adhesive for forming the adhesive layer 3 are not particularly limited, but preferably, the coating amount is 0.1 g / m 2 ~50 g / m 2 and the coating thickness is 0.1 μm to 50 μm. The adhesive layer 3 has adhesiveness in order to facilitate the attachment of the concealment member 20.

[0041] The coating base material layer 4 serves as the base material of the concealment member 20. The coating base material layer 4 conceals the confidential information 5 formed on the front surface of the card base material 1 and also has a function as a protective layer that protects the confidential information 5 from being damaged. As the coating base material layer 4, various materials can be applied according to the application as long as they have heat resistance, mechanical strength, solvent resistance, etc. For example, polyester-based resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyamide-based resins such as nylon 6, polyolefin-based resins such as polyethylene, polypropylene, and polymethylpentene, vinyl-based resins such as polyvinyl chloride, acrylic-based resins such as polymethyl methacrylate, polycarbonate, cellophane, cellulose-based films such as cellulose acetate, etc. can be exemplified. The coating base material layer 4 may be a copolymer resin mainly composed of these resins, or a mixture (including polymer alloys), or a laminate composed of multiple layers. Usually, polyester-based films such as polyethylene terephthalate and polyethylene naphthalate are preferably used because of their high heat resistance and mechanical strength.

[0042] In addition, the coated base material layer 4 may be an oriented film or an unoriented film, but a film stretched in the uniaxial or biaxial direction is preferred for the purpose of improving strength. The coated base material layer 4 is used in the form of a film, sheet, or board composed of at least one layer of these resins. The thickness of the coated base material layer 4 can usually be about 2.5 μm to 50 μm, preferably 2.5 μm to 12 μm, and more preferably 4 μm to 6 μm. The coated base material layer 4 is transparent and has light transmittance. In addition, a colorant is kneaded into the coated base material layer 4. Therefore, the coated base material layer 4 is colored and transparent. For example, a blue colorant can be kneaded in.

[0043] The coated base material layer 4 may be subjected to an easy adhesion treatment such as corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called anchor coat, adhesion promoter, easy adhesive) coating treatment, preheating treatment, dust removal treatment, vapor deposition treatment, alkali treatment, etc. on its surface. Further, additives such as fillers, plasticizers, colorants, and antistatic agents may be added as necessary.

[0044] The colored layer 7 is a layer formed on the side of the coated base material layer 4 opposite to the card base material 1. The colored layer 7 has a concealment layer 7a for concealing confidential information, a white layer 7b for further concealing the concealment layer 7a, and a pattern layer 7c. The concealment layer 7a, the white layer 7b, and the pattern layer 7c are laminated in this order from the side of the coated base material layer 4. The concealment layer 7a can be composed of one layer or two or more layers. In this embodiment, the concealment layer 7a has a two-layer structure of a first concealment layer 7aa and a second concealment layer 7ab.

[0045] As the pigment used in the ink for forming each layer of the colored layer 7, those with high concealment are used. For example, as such pigments with high concealment, metal-based powders such as silver powder, aluminum powder, brass powder, or copper powder, calcium carbonate, zinc oxide, alumina, titanium dioxide, silica, barium sulfate, talc, kaolin, clay, carbon black, or resin powder can be used.

[0046] In addition, as the binder resin used in the ink for forming each layer of the coloring layer 7, a resin that holds the above-mentioned highly concealing pigment and has good adhesiveness to the coated base material layer 4 is selected and used. For example, natural rubber, or rubber-based natural resins such as hydrochloric acid rubber, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polyisoprene, polychloroprene, acrylic, vinyl chloride, or vinyl chloride-vinyl acetate copolymer, etc. are used.

[0047] In this embodiment, the first concealment layer 7aa is black and the second concealment layer 7ab is silver. The first concealment layer 7aa is black, and the second concealment layer 7ab may be formed, for example, by known printing methods such as offset printing, gravure printing, or silk screen printing using India ink, silver ink obtained by inking metal powder, etc., and may be printed multiple times to enhance concealment. Also, the white layer 7b is formed by known printing methods such as offset printing, gravure printing, or silk screen printing using white ink containing a pigment that exhibits white among the above-mentioned pigments. The pattern layer 7c is formed by known printing methods such as offset printing, gravure printing, or silk screen printing using India ink.

[0048] <3. Concealment Member Sheet> The concealment member 20 attached as a part of the information concealment card 10 is separately supplied and attached to the front surface of the card base material 1. The supply is performed in the state of the concealment member sheet 20A in which the adhesive layer 3 side of the concealment member 20 is protected by the release base material layer 6. The concealment member sheet 20A is a sheet having a plurality of concealment members 20 for attaching to another medium, the card base material 1, to make a predetermined range difficult to visually recognize. FIG. 4 is a diagram showing an example of the concealment member sheet 20A according to this embodiment. Among them, FIG. 4(a) is a plan view seen from the pattern layer 7c (coloring layer 7) side, and FIG. 4(b) is a cross-sectional view corresponding to the line E-E in FIG. 4(a).

[0049] The release base material layer 6 has a strip shape that extends greatly in the longitudinal direction (the left-right direction in Fig. 4(a)). Each concealment member 20 is attached to the release base material layer 6 subjected to a release treatment in a state of being arranged side by side at regular intervals by the adhesive layer 3. As shown in Fig. 4(a), in the concealment member sheet 20A, the concealment members 20 are arranged at equal intervals along the longitudinal direction on one surface of the release base material layer 6.

[0050] The release base material layer 6 is a support for protecting the adhesive layer 3 and supporting the concealment member 20. Various materials can be applied as the release base material layer 6 according to the application. For example, any of natural fiber paper, coated paper, tracing paper, plastic film, glass, ceramics, etc. may be used, and it may be appropriately selected according to the application. In the case of a plastic film, examples include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as nylon 6, polyolefin resins such as polyethylene, polypropylene, and polymethylpentene, vinyl resins such as polyvinyl chloride, acrylic resins such as polymethyl methacrylate, and cellulose-based films such as polycarbonate, cellophane, and cellulose acetate. The release base material layer 6 may be a copolymer resin mainly composed of these resins, or a mixture (including polymer alloy), or a laminate composed of multiple layers.

[0051] Also, when using a plastic film as the release base material layer 6, it may be a stretched film or an unstretched film, but for the purpose of improving strength, a film stretched in the uniaxial direction or biaxial direction is preferred. The release base material layer 6 is used in the form of a film, sheet, or board composed of at least one layer of these resins. The release base material layer 6 has a release agent such as a silicone-based or acrylic-based resin printed or coated on the surface on the side in contact with the concealment member (the surface exposed in the part where the concealment member 20 does not exist in Fig. 4: the front side of the drawing in Fig. 4), and the release treatment has been performed.

[0052] <4. Manufacture of Information Concealment Card> Next, a method for manufacturing an information hiding card according to the present embodiment will be described. FIG. 5 is a flowchart showing a method for manufacturing an information hiding card according to an embodiment of the present disclosure. First, in steps S1 to S4, a concealment member sheet 20A is prepared.

[0053] Specifically, in steps S1 to S5, a concealment member sheet 20A including an adhesive layer 3, a coating base material layer 4, and a release base material layer 6 is manufactured. First, on one surface of the coating base material layer 4, matte unevenness is formed (step S1). The matte unevenness is formed by applying pressure with an uneven mold such as a steel material and shaping it. The uneven mold can be obtained by forming unevenness on the surface of a steel material by blasting such as bead blasting. The size of the beads used for bead blasting corresponds to the unevenness formed on the coating base material layer 4. Therefore, it is preferable to use beads having a size that can make the average roughness of the surface of the coating base material layer 4 Ra 0.5 or more and 1.2 or less, more preferably Ra 0.7 or more and 1.0 or less. Using the obtained uneven mold, it is pressure-bonded to one surface of the coating base material layer 4 to perform matte processing on the coating base material layer 4.

[0054] Subsequently, a pattern printing portion 8 is formed by printing on the surface of the coating base material layer 4 having the uneven shape (step S2). As the pattern printing portion 8, a pattern capable of indicating that it has been illegally peeled off is formed. For example, a character pattern such as "VOID" is formed by printing. The printing of the pattern printing portion 8 can be formed by a known printing method such as offset printing, gravure printing, screen printing, or inkjet printing.

[0055] Next, an adhesive is applied to the surface of the coating base material layer 4 on the side where the pattern printing portion 8 is formed to form an adhesive layer 3 (step S3). The application amount and application thickness of the adhesive in the adhesive layer 3 are not particularly limited, but preferably, the application amount is 0.1 g / m 2 ~50 g / m 2and the coating thickness is 0.1 μm to 50 μm. As a method for applying the adhesive for forming the adhesive layer 3, for example, coating by a gravure method, a spray coating method, a flexo method, etc., which can be relatively speeded up, can be used.

[0056] Next, a release base material layer 6 is laminated on the surface of the coated base material layer 4 on the side where the adhesive layer 3 is formed (step S4). As the release base material layer 6, one having a release treatment performed in advance on the surface in contact with the adhesive layer 3 is used.

[0057] Subsequently, a coloring layer 7 is formed on the surface of the coated base material layer 4 on the side opposite to the release base material layer 6 (step S5). The coloring layer 7 is formed in the order of the first shielding layer 7aa, the second shielding layer 7ab, the white layer 7b, and the pattern layer 7c from the coated base material layer 4 side. Each layer of the first shielding layer 7aa, the second shielding layer 7ab, the white layer 7b, and the pattern layer 7c can be formed by a known printing method such as offset printing, gravure printing, screen printing, or inkjet printing. For example, the first shielding layer 7aa is formed with black ink, the second shielding layer 7ab is formed with silver ink, the white layer 7b is formed with white ink, and the pattern layer 7c is formed with black ink by screen printing. In this embodiment, the first shielding layer 7aa, the second shielding layer 7ab, and the white layer 7b are formed by solid printing, and only the pattern layer 7c is formed in a pattern.

[0058] In this state, a sheet with the shielding members 20 attached to multiple sides vertically and horizontally is obtained. This sheet is slit and separated in the direction in which the shielding members 20 are arranged in a row, and the coated base material layer 4 other than the shielding members 20 is removed from the release base material layer 6 by so-called culling. Thereby, a shielding member sheet 20A as shown in FIG. 4 is obtained.

[0059] Next, confidential information is formed on the card substrate (step S6). The formation of the confidential information 5, which is variable information, can be performed by a known printing method such as inkjet printing or electrophotographic printing. For the fixed information other than the confidential information, it is performed by a known printing method such as offset printing, gravure printing, screen printing, inkjet printing, or electrophotographic printing. When forming the first confidential information 5a and the second confidential information 5b as the confidential information 5 as in this embodiment, either one of the first confidential information 5a and the second confidential information 5b may be formed first, or they may be formed simultaneously. When either one is formed first, either the first confidential information 5a or the second confidential information 5b may be formed first. In this embodiment, the first confidential information 5a and the second confidential information 5b are formed by gravure printing using ink.

[0060] Next, using a label applicator called a labeler, a concealment member 20 composed of an adhesive layer 3, a coated substrate layer 4, and a colored layer 7 is attached to the card substrate 1 (step S7). Specifically, while conveying the concealment member sheet 20A, the concealment member 20 is peeled from the release substrate layer 6. Then, the concealment member 20 is attached to the card substrate 1 with the adhesive layer 3 facing the card substrate 1 side. At this time, the concealment member 20 is attached while aligning it with the position covering the confidential information area 35 where the confidential information 5 is formed on the card substrate 1.

[0061] As a result, the confidential information 5 formed on the card substrate 1 is concealed by the concealment member 20 provided with the colored layer 7. The state seen from the front side (concealment member 20 side) of the information concealment card 10 at this time is as shown in Fig. 1(a). As shown in Fig. 1(a), in the information concealment card 10, the concealment member 20 is attached so as to cover the confidential information area 35, and the colored layer 7 formed on the outermost surface is visible. In the information concealment card 10 obtained in this way, it is difficult to visually recognize the confidential information 5 from the outside due to the concealability of the colored layer 7. Therefore, it is possible to prevent the leakage of the confidential information 5.

[0062] Also, in the example of Fig. 1(a), except for the locations where the concealment member 20 is formed and the locations where the code information 40 is formed, the surface is in the state of plain paper (blank), and patterns and the like are omitted. However, if necessary, arbitrary information and patterns may be formed on the front and back surfaces of the card substrate 1 by printing or the like. Printing of information on the card substrate 1 can be performed by known printing methods such as offset printing, gravure printing, screen printing, and inkjet printing.

[0063] <5. Use of Information Concealment Card> The information concealment card 10 as shown in Figs. 1 and 2 is displayed and sold in a store. In the displayed state, the confidential information cannot be visually recognized from the outside. A user who purchases the information concealment card 10 at a store opens the concealment member 20 and separates a part of the concealment member 20 from the information concealment card 10 in order to know the confidential information. Specifically, the tab portion 33 is pinched with a finger and pulled along the longitudinal direction of the concealment member 20.

[0064] Fig. 6 is a diagram showing a state in which a part of the concealment member 20 of the information concealment card according to the present embodiment is separated and the confidential information area 35 is exposed. When the tab portion 33 is pinched with a finger and pulled according to the message "Please fold in the direction of the arrow →" formed in the pattern layer 7c of the concealment member 20 as shown in Fig. 1(a), the adhesive layer 3 and the card substrate 1 are peeled off. Then, the concealment member 20 is separated from the card substrate 1. And, as shown in Fig. 6, the confidential information area 35 is completely exposed. Thereby, the confidential information 5 can be visually recognized from the front surface side.

[0065] When the two-dimensional code is a QR code (registered trademark), it is necessary to ensure that within 4 dots from the edge of the QR code, there is no color similar to the dark color forming the QR code. If there is a dark-colored portion within 4 dots from the edge of the QR code, it may not be possible to accurately read the QR code. This "dot" is the minimum unit that constitutes the QR code, and the actual printed size varies according to the size of the entire QR code. For example, there are QR codes with a vertical × horizontal size of 37 dots × 37 dots or 41 dots × 41 dots. And the size of 1 dot is often about 0.25mm to 0.29mm.

[0066] When using the information concealment card 10 as a POSA card, in the state shown in Fig. 1(a) before separating the concealment member 20, the user purchases the information concealment card 10 at the store. At that time, at the store's register, the barcode reader reads the code information 40. As a result, the card identification information recorded in the code information 40 is transmitted to a predetermined computer on the network and activated. Specifically, the computer sets the information concealment card 10 with that card number to a usable state.

[0067] Then, the user who purchased the information concealment card 10 separates a part of the concealment member 20 as shown in Fig. 6 to recognize the confidential information. Then, the user accesses the computer on the above network and transmits the confidential information as a password. When the password associated with the already activated card number is input, authentication using the password is performed, and processes such as setting the availability of a predetermined service commensurate with the monetary value corresponding to that card number are carried out. And the user who purchased the information concealment card 10 can receive the provision of a service commensurate with the monetary value.

[0068] When two types of confidential information are recorded as the confidential information 5 as in this embodiment, authentication can be performed by two methods according to each confidential information. When using the second confidential information 5b which is visible information, after visually recognizing the confidential information as described above, the recognized confidential information is used as a password or the like to perform authentication on a computer on the network.

[0069] On the other hand, when using the first confidential information 5a which is machine-readable information, the recorded information is read from a two-dimensional code or the like by a code reader. Then, the computer performs a predetermined process using the read recorded information, and authentication is performed on a computer on the network using the read recorded information as a password or the like. The two-dimensional code can also record the URL of the access destination, an instruction for launching a browser for access, and the like. In this case, the user can access a computer on the network and receive the service just by performing the operation of reading the first confidential information 5a with a code reader.

[0070] The second confidential information 5b can be recorded in the first confidential information 5a. For example, as shown in FIG. 6, when the second confidential information 5b is the visible character string "A1234567890", "A1234567890" can be recorded as the recorded information in the first confidential information 5a which is a two-dimensional code. In this case, when the first confidential information 5a is read by a code reader, the recorded character information "A1234567890" can be obtained. As described above, when the first confidential information 5a also records the URL of the access destination, when the first confidential information 5a is read by a code reader, a computer or the like connected to the code reader can access the computer on the network specified by the URL and then perform the process of automatically inputting the recorded character string.

[0071] FIG. 7 is a cross-sectional view of the information hiding card 10 showing the states before and after peeling. FIG. 7(a) shows the state at the time of attachment, and FIG. 7(b) shows the state at the time of peeling. As shown in FIG. 7(a), in the information hiding card 10 according to the present embodiment, the surface of the covering base material layer 4 on the side of the adhesive layer 3 is subjected to a matte process and has matte-like irregularities. And the covering base material layer 4 has a pattern printing portion 8 on the matte-like irregularities. Before the concealment member 20 is peeled off, the pattern printing portion 8 is sandwiched between the covering base material layer 4 and the adhesive layer 3. When the concealment member 20 is peeled off, the adhesive layer 3 is pulled on the covering base material layer 4 side and the card base material 1 side, respectively. Therefore, the ink printed as the pattern printing portion 8 is pulled from the covering base material layer 4 side to the adhesive layer 3 side. And a space is formed between the covering base material layer 4 and the ink, and air enters the space. As a result, when viewed from the colored layer 7 side, the pattern printing portion 8 looks different in color.

[0072] As shown in FIG. 7(b), the ink printed as the pattern printing portion 8 is pulled from the covering base material layer 4 side to the adhesive layer 3 side, and a space P is generated. When air enters this space P, the pattern printing portion 8 looks different in color from other portions. And once peeled off, the concealment member 20 remains in a state where the pattern of the pattern printing portion 8 is represented. In FIG. 7(b), for convenience of illustration, the masking of the adhesive layer 3 is omitted. FIG. 8 is a view showing a state where the concealment member 20 is reattached onto the confidential information area 35 of the card base material 1 after being peeled off once. When a large number of character patterns of "VOID" are formed as the pattern printing portion 8, when reattached after peeling off, as shown in FIG. 8, the character pattern of "VOID" is visually recognized. For this reason, it becomes clear that it has been peeled off once, and fraud can be detected. In FIG. 8, for convenience of illustration, the transparent area 32 is shown in white and the pattern of "VOID" is shown in black, but in reality, the transparent area 32 is darker in color and the pattern of "VOID" is lighter in color. When the covering base material layer 4 is blue transparent, the transparent area 21 is darker in blue and the pattern of "VOID" is lighter in blue. Due to this difference in color density, the pattern by the pattern printing portion 8 can be recognized.

[0073] The preferred embodiments of the present disclosure have been described above. However, the present disclosure is not limited to the above embodiments, and various modifications are possible. For example, in the above embodiments, two types of confidential information, i.e., first confidential information and second confidential information, are used as the confidential information. However, only the first confidential information may be used as the confidential information.

[0074] Also, in the above embodiments, as the first confidential information, a two-dimensional code that records information and is machine-readable is used. However, it is not limited to the two-dimensional code, and other code information such as a one-dimensional barcode may be used.

[0075] Also, in the above embodiments, visible confidential information other than code information may be used as the first confidential information.

[0076] Also, in the above embodiments, the information concealment card is used as a POSA (Point of Sales Activation) card. However, it can be used as various cards for concealing confidential information, such as a scratch card for a lottery, a gift card, a prepaid card, a POSA card (registered trademark), an electronic money card, etc.

[0077] Also, in the above embodiments, the code information 40 is formed on the front surface of the card base material 1. However, when the information concealment card is used as a lottery ticket or the like, it is not always necessary to form the code information on the front surface, the back surface, etc.

Explanation of Reference Numerals

[0078] 1 ··· Card base material 3 ··· Adhesive layer 4 ··· Coating base material layer 5 ··· Confidential information 5a ··· First confidential information 5b ··· Second confidential information 6 ··· Release base material layer 7 ··· Coloring layer 7a ··· Concealment layer 7aa ··· First concealment layer 7ab ··· Second concealment layer 7b ··· White layer 7c ··· Pattern layer 8 ··· Pattern printing section 10 ··· Information hiding card 20 ··· Hiding member 20A ··· Hiding member sheet 31 ··· Hiding area 32 ··· Transmissive area 33 ··· Knob portion 35 ··· Concealed information area 35a ··· First concealed information area 35b ··· Second concealed information area 40 ··· Code information

Claims

1. An information-hiding card having a card substrate on which hidden information, which is information to be hidden, is formed, and a hiding member attached to the card substrate so as to hide the hidden information, wherein the hiding member has a covering substrate layer for covering the hidden information, an adhesive layer formed by overlapping on the surface of the covering substrate layer on the card substrate side, and a coloring layer formed by overlapping on the surface of the covering substrate layer on the side opposite to the card substrate side, the hiding member is divided into a hiding area, which is an area where the coloring layer is formed, and a transmission area, which is an area where the coloring layer is not formed, and the hiding member is attached to the card substrate by the adhesive layer, the surface of the covering substrate layer on the adhesive layer side has a matte unevenness, the surface of the covering substrate layer on the adhesive layer side has a pattern printing portion, the hidden information includes first hidden information and second hidden information whose width in a direction intersecting the longitudinal direction of the hiding member is smaller than that of the first hidden information, the width of the hiding area in a direction intersecting the longitudinal direction of the hiding member is smaller at a position overlapping the second hidden information than at a position overlapping the first hidden information, the first hidden information is a two-dimensional code recording predetermined information, the information-hiding card.

2. The information-hiding card according to claim 1, wherein the second hidden information is character information.

3. The information-hiding card according to claim 2, wherein the first hidden information records the second hidden information.

4. A hiding member sheet provided with a plurality of hiding members for attaching to another medium to make a predetermined range difficult to visually recognize, wherein the hiding member has a covering substrate layer for covering hidden information, which is information to be hidden, an adhesive layer formed by overlapping on one surface of the covering substrate layer, and a coloring layer formed by overlapping on the surface of the covering substrate layer on the side opposite to the adhesive layer, the hiding member is divided into a hiding area, which is an area where the coloring layer is formed, and a transmission area, which is an area where the coloring layer is not formed, the surface of the covering substrate layer on the adhesive layer side has a matte unevenness, the surface of the covering substrate layer on the adhesive layer side has a pattern printing portion, the hidden information includes first hidden information and second hidden information whose width in a direction intersecting the longitudinal direction of the hiding member is smaller than that of the first hidden information, The width of the hidden area in the direction intersecting the longitudinal direction of the hidden member is smaller at the position overlapping the second confidential information than at the position overlapping the first confidential information. The hidden member sheet, wherein the first confidential information is a two-dimensional code recording predetermined information.

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