Laminate, card and booklet using the laminate

Abstract

To solve the problem that it has been impossible to prevent deformation or foaming of a laminate without adjusting a color-developing layer.SOLUTION: A laminate according to an embodiment of the present invention comprises a transparent layer, and a glass particle layer containing glass particles. The glass particle layer further includes a first ink.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a laminate, and a card and a booklet using the laminate. [Background technology]

[0002] There is a known technology for printing by laser coloring using a YAG laser or the like. When a color-developing layer is irradiated with a laser, heat is generated by the energy of the laser. It is known that the heat can cause deformation or foaming in or near the printed portion of the color-developing layer or the laminate including the color-developing layer.

[0003] In this regard, Patent Document 1 (JP Patent Publication No. 2004-148642) discloses a technique for adjusting the thickness of a coloring layer (Abstract, paragraphs

[0001] to

[0006] ), and Patent Document 2 (JP Patent Publication No. 2004-243685) discloses a technique for using a coloring layer and an adhesive layer that satisfy a predetermined glass transition temperature condition in a card sheet (Abstract, paragraphs

[0001] to

[0009] ). These techniques prevent deformation and foaming of the card sheet by their configuration.

[0004] Patent Document 3 (JP 2016-539031 A) discloses a laser marking product that is thermally stable by adjusting the acid generating compound of the layer to be irradiated with a laser (paragraphs

[0001] to

[0021] ), and in particular, paragraph

[0143] thereof discloses a configuration in which a glass support is used as a support for supporting a color laser markable layer, which is a layer to be printed. Note that in the technology of Patent Document 3, the glass support is intended to support the color laser markable layer, and Patent Document 3 does not disclose a configuration in which the glass support includes anything other than glass. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-148642 A [Patent Document 2] JP 2004-243685 A [Patent Document 3] JP 2016-539031 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the techniques of Patent Documents 1 to 3 are techniques for preventing deformation and foaming of the laminate by adjusting the layer (color-forming layer) itself that develops color when irradiated with a laser, and therefore it was necessary to further adjust the composition and structure of the color-forming layer depending on the absorption rate of laser light energy of the layer placed below the color-forming layer.

[0007] Without adjusting the color-developing layer, it was not possible to prevent deformation and foaming of the laminate. [Means for solving the problem]

[0008] A laminate according to an embodiment of the present invention includes a transparent layer and a glass particle layer including glass particles, and the glass particle layer may further include a first ink.

[0009] The laminate according to an embodiment of the present invention may further comprise a core layer, the glass particle layer being disposed between the core layer and the transparent layer.

[0010] In the laminate according to the embodiment of the present invention, the first ink may include at least a transparent ink or a colored ink.

[0011] The laminate according to an embodiment of the present invention may further include a colored layer colored with a second ink, the colored layer being disposed between the core layer and the transparent layer, or the transparent layer being disposed between the colored layer and the core layer.

[0012] In the laminate according to the embodiment of the present invention, the second ink may include a colorant.

[0013] In the laminate according to the embodiment of the present invention, the ratio of the weight of the glass particles in the glass particle layer to the weight of the first ink after solidification is 1 or less.

[0014] In the laminate according to an embodiment of the present invention, at least a portion of the glass particles in the glass particle layer is coated with a metal or a metal oxide.

[0015] The laminate according to an embodiment of the present invention further comprises an additional transparent layer, the additional transparent layer being disposed on a surface side of the core layer opposite to the surface on which the transparent layer is disposed.

[0016] A card may comprise a laminate according to an embodiment of the invention.

[0017] A booklet may comprise a laminate according to an embodiment of the present invention.

[0018] A card or booklet according to an embodiment of the present invention further comprises an electronic information storage medium.

[0019] The laminate, card or booklet according to the embodiment of the present invention further comprises another core layer on the surface of the core layer on the side on which the glass particle layer is not disposed. [Brief description of the drawings]

[0020] [Figure 1] 1 shows a first conventional laminate 1. [Diagram 2] 1 shows a second conventional laminate 1. [Diagram 3] 1 shows a third conventional laminate 1. [Figure 4] A laminate 100 according to a first embodiment is shown having a glass particle layer 130 disposed between a core layer 110 and a transparent layer 120 . [Diagram 5] A laminate 100 according to a second embodiment is shown having a colored layer 140 disposed between a glass particle layer 130 and a transparent layer 120 . [Figure 6]A laminate 100 according to a third embodiment is shown having a transparent layer 120 disposed between a glass particle layer 130 and a colored layer 140 . [Figure 7] An example of a card using a laminate of the present invention is shown. [Figure 8] 1 shows an example of a card using a laminate of the present invention having two core layers. [Figure 9] Specific examples of a first and second embodiment of a card using a laminate are shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] In the following description, like reference numbers in different figures refer to like elements.

[0022] [Conventional technology (first laminate)] Fig. 1 shows a conventional first laminate 1. The laminate 1 has a core layer 2 and a transparent layer 3. The laminate 1 is irradiated with laser light 10, and the irradiated portion of the transparent layer 3 is scorched, thereby coloring the laminate 1 in black, brown, or the like. The coloring can also be called color development, and the transparent layer 3 can also be called a laser color development layer.

[0023] [Conventional technology (second laminate)] 2 shows a second conventional laminate 1. The laminate 1 has a colored layer 4 between a core layer 2 and a transparent layer 3. As a result, the surface of the laminate 1, which has the color of the colored layer 4 as the background color on the laser irradiation side, is irradiated with laser light 10 to scorch the irradiated portion of the transparent layer 3, thereby coloring the color of the colored layer 4 with a color such as black or brown. The coloring can also be called color development, and the transparent layer 3 can also be called a laser color development layer.

[0024] [Conventional technology (third laminate)] FIG. 3 shows a third conventional laminate 1. The laminate 1 has a transparent layer 3 between the colored layer 4 and the core layer 2. Thereby, by irradiating the laser light 10 and peeling off the colored layer 4 by the heat of the laser light 10, the color of the core layer appears in the part of the colored layer 4 irradiated with the laser light 10. By adding a layer colored with a color different from the color of the colored layer 4 between the colored layer 4 and the core layer 2, the above different color can be made to appear in the part of the colored layer 4 irradiated with the laser light 10. When the transparent layer 3 is colorless and transparent, the color of the core layer 2 can be observed from the peeled part of the colored layer 4. When the core layer 2 is colorless and transparent, the color of the outside can be observed from the peeled part of the colored layer 4. In addition, when the transparent layer 3 develops a color by irradiation with the laser light 10, the developed color can be observed from the peeled part of the colored layer 4.

[0025] [First Example] FIG. 4 shows a laminate 100 according to a first embodiment in which a glass particle layer 130 is disposed between a core layer 110 and a transparent layer 120. The laminate 100 is irradiated with a laser beam 10, and the irradiated portion of the transparent layer 120 is scorched (or heated), so that the laminate is colored black or brown, and characters, symbols, etc. are printed on the laminate. The coloring can also be called coloring, and the transparent layer 120 can also be called a laser coloring layer. The core layer is also called a core sheet, and the transparent layer is also called an over sheet. In particular, a transparent layer that develops color by irradiation with a laser beam is called a laser coloring over sheet or a laser coloring sheet. The transparent layer can have a function of protecting the printed portion and a layer disposed near the transparent layer. In addition, the transparent layer is observed as colorless and transparent under visible light. This embodiment corresponds to a configuration in which a glass particle layer 130 is provided on the conventional technology (first laminate).

[0026] The core layer 110 is formed of a resin such as plastic, and is typically opaque. Furthermore, the core layer 110 is a member that supports the laminate, that is, a member that carries the skeleton of the laminate. The transparent layer 120 is formed of a resin such as plastic, and is typically transparent, and develops a color such as black or brown due to heat caused by irradiation with laser light. Furthermore, the thickness of the transparent layer 120 may be thinner than the thickness of the core layer 110, and the transparent layer 120 can protect a design provided on the core layer 110. Here, the design is a printed pattern or the like, and can be provided as a printing layer on the core layer 110. The printing layer is omitted in the drawings. The glass particle layer 130 is formed by adding glass particles to a paste-like substance and stirring. The paste-like substance can typically be ink, and the ink can be a transparent ink or a colored ink. The ink that can be included in the glass particle layer can be any ink that does not absorb the laser wavelength, and a commercially available product can be used. The colored ink can be a translucent ink. The glass particle layer 130 is adhered to the core layer 110 and / or the transparent layer 120 by a method such as printing or coating. After adhesion, the glass particle layer 130 solidifies over time, fixing the layers together to form a laminate. In this embodiment, the glass particles can be small enough to be mixed with the ink. The average diameter of the glass particles can be 10 to 50 micrometers, preferably 22 to 40 micrometers.

[0027] The laminate 100 is subjected to a force such as vertical compression, and the layers are bonded to each other. Compression may be compression by applying heat or pressure bonding. In this embodiment, since the glass particle layer 130 is used instead of the glass layer, the glass component is not damaged by the force.

[0028] When the ink of the glass particle layer 130 is transparent, the color of the core layer 110 becomes the background color of the laser irradiated surface, i.e., the printed surface. When the ink of the glass particle layer 130 is colored ink, the color of the ink becomes the background color. When the laser is irradiated, printing is performed on the background color. In this way, laser printing is realized on the surface of the laminate 100.

[0029] The inventors of the present invention have discovered that when a laser is irradiated to a laminate 100 using a glass particle layer 130, deformation, bubbling, etc. do not occur in the laminate 100 on the side of the laminate 100 irradiated with the laser light 10. In this embodiment, the glass particle layer 130 transmits, reflects, scatters, etc. the laser light 10, thereby reducing heat generated by irradiation with the laser light 10. By reducing the generation of heat, deformation and bubbling of the laminate 100 are prevented or reduced.

[0030] The product using the laminate 100 according to this embodiment can be applied to products with a more sophisticated design because deformation or foaming does not occur at least on the side of the transparent layer 120 where the laser is irradiated. Furthermore, since the glass particle layer 130 is not a glass layer, it is possible to suppress the occurrence of breakage even if force is applied.

[0031] In this embodiment, a YAG laser is preferably used as the laser.

[0032] In the glass particle layer 130 of this embodiment, it is desirable that the ratio of the weight of the glass particles to the weight of the solidified ink (ink that has turned from liquid to solid after a predetermined time has passed) is 1 or less, that is, the value obtained by dividing the weight of the glass particles by the weight of the solidified ink is 1 or less. By setting this ratio to 1 or less and restricting the amount of glass particles to a predetermined ratio, it is possible to prevent the glass particle layer 130 from peeling off from other layers, and to more reliably achieve adhesion to other layers.

[0033] The surface of the glass particles is coated with a metal or a metal oxide. In one embodiment, a part of the surface of the glass particles may be coated with a metal or a metal oxide. Examples of metals include gold and silver, and examples of metal oxides include titanium oxide and iron oxide. By coating the surface of the glass particles with a metal or a metal oxide, a pearlescent luster is obtained, and the design of the product using the laminate is further improved.

[0034] [Second Example] This embodiment is roughly similar to the first embodiment, but differs from the first embodiment in that a colored layer 140 is used. This embodiment corresponds to a configuration in which a glass particle layer 130 is provided in the conventional technology (second laminate). In the colored layer 140, coloring is achieved by printing. In one embodiment, coloring may be achieved by halftone dot printing, that is, printing that is achieved by arranging colored dots in a mesh pattern. FIG. 5 shows a laminate 100 according to the second embodiment in which a colored layer 140 is arranged between the glass particle layer 130 and the transparent layer 120. In the laminate 100, the transparent layer 120, the colored layer 140, the glass particle layer 130, and the core layer 110 are arranged in this order from the printing surface side.

[0035] In this embodiment, the background color of the printed surface of the laminate 100 is the ink of the colored layer 140 due to the colored layer 140 containing ink. In this embodiment, the ink of the glass particle layer 130 and the colored layer 140 may each be transparent or colored. The colored ink may be a translucent ink. In this embodiment, the following variations in the ink in each layer are possible.

[0036] [Table 1]

[0037] In the case of pattern 1, the background color of the printing surface is the color of the core layer 110, which is typically white. In the case of pattern 2, the background color of the printed surface is the color of the colored layer 140. In the case of pattern 3, the background color of the printed surface is the color obtained when the inks of colored layer 140 and glass particle layer 130 are superimposed. When the inks of colored layer 140 and glass particle layer 130 are different in color, it is possible to realize a color that cannot be expressed by a single color, and when the inks of both are the same color, it is possible to realize a darker color. In the case of pattern 4, the background color of the printed surface is the color of the glass particle layer 130.

[0038] In this embodiment, the laminate 100 is irradiated with laser light 10, and the irradiated portions of the transparent layer 120 are scorched (or heated), thereby coloring them black, brown, etc., and letters, symbols, etc. are printed on a background color.

[0039] [Third Example] This embodiment has a similar configuration to the second embodiment, but differs from the second embodiment in that the colored layer 140 is disposed on the printing surface. This embodiment corresponds to a configuration in which the glass particle layer 130 is disposed in the conventional technology (third laminate). FIG. 6 shows a laminate 100 according to the third embodiment in which the transparent layer 120 is disposed between the glass particle layer 130 and the colored layer 140. In the laminate 100, the layers are disposed in the order of the colored layer 140, the transparent layer 120, the glass particle layer 130, and the core layer 110 from the printing surface side. In this embodiment as well, variations of the ink as shown in Table 1 are possible, as shown in the second embodiment.

[0040] In this embodiment, the color of the core layer 110 or the glass particle layer 130 appears in the portion of the colored layer 140 irradiated with the laser light 10 by irradiating the laser light 10 and peeling the colored layer 140 with heat or the like. By adding a layer colored with a color different from the colored layer 140 between the colored layer 140 and the core layer 110, the color of the added layer can be made to appear in the portion of the colored layer 140 irradiated with the laser light 10. In another embodiment, the colored layer 140 is peeled off with heat or the like by irradiating the laser light 10, and the portion of the transparent layer 120 to which heat is applied is scorched (or heated) to obtain coloring such as black or brown. Therefore, by peeling off a part of the colored layer 140, the color of the core layer 110 or the glass particle layer 130, the color of the added layer, or coloring such as black or brown on the transparent layer 120 can be made to appear, thereby realizing printing.

[0041] As described above in the first, second and third embodiments, in the embodiment of the present invention, the layers can be arranged as follows. [Table 2]

[0042] [Overview of cards using laminates] Laser printing is increasingly being used to display variable information such as card member numbers on financial cards such as credit cards and cash cards. One of the conventional printing methods is thermal printing. Thermal printing has the advantage that ribbons of various colors can be used and background designs are not important. However, cards created by thermal printing have problems such as a tendency for print chipping to occur, poor durability, and information wears away over time. Furthermore, because personal information remains on the ribbon after transfer, disposing of the ribbon also poses security issues.

[0043] On the other hand, laser color printing is extremely unlikely to chip, the printing is permanently readable, and there are further advantages such as no waste being generated that could cause security problems.For plastic cards, a transparent oversheet is generally laminated onto a white opaque core substrate and molded into one piece by heat and pressure, and when laser coloring is desired, a laser coloring oversheet is used.

[0044] Incidentally, in the case of financial cards, from the viewpoint of design, it is not rare to color the entire back of the card in a metallic silver or gold color. In this case, ink with aluminum powder dispersed therein is generally used. When laser printing is attempted on a metallic colored portion, the aluminum powder, which is the ink pigment, absorbs the thermal energy of the laser irradiation, generating excess heat and causing the surrounding synthetic resin to foam. For this reason, when laser printing is performed on a card with metallic printing, it is necessary to remove the metallic printing at least from the printing area (providing a window area, and only in this area the color of the core layer (e.g., white) is visible). For this reason, the larger and more complex the printing area is, the more the user feels uncomfortable with the design.

[0045] [First Example of Card Using Laminate] 7 shows an embodiment of a card 700 using a laminate 799 of the present invention. The card 700 includes a laminate 799 including, from a first surface side (a side irradiated with laser light 10) to a second surface side (a side irradiated with laser light 11, 12), a first transparent layer 720, a first colored layer 740, a glass particle layer 730, a core layer 710, a second transparent layer 750, and a second colored layer 760. The card 700 may further include a first magnetic stripe 765 on the first surface side and a second magnetic stripe 770 on the second surface side.

[0046] The compositions of the first transparent layer 720, the first colored layer 740, the glass particle layer 730, and the core layer 710 in this embodiment can be similar to the compositions of the transparent layer 120, the colored layer 140, the glass particle layer 130, and the core layer 110 in the second embodiment, respectively.

[0047] The magnetic stripe 765 on the first side and the magnetic stripe 770 on the second side store information related to a user of the card 700 equipped with the magnetic stripe. By swiping the card 700 over a magnetic stripe reader (not shown), the magnetic stripe reader can read the information on the magnetic stripe. In one embodiment, the card 700 may have either the magnetic stripe 765 on the first side and the magnetic stripe 770 on the second side, or may have no magnetic stripe.

[0048] Card 700 may further include an IC (integrated circuit) chip (not shown) that stores information related to the user of card 700. An IC chip reader can read the information on the IC chip. IC chips are of non-contact type and contact type, and card 700 may include one or more IC chips of both types, or one or more IC chips of either type. The non-contact type IC chip may be disposed inside card 700, i.e., in any part of each layer. Also, the contact type IC chip is disposed exposed on the first surface or the second surface of the card.

[0049] The first transparent layer 720 is also called an oversheet layer. In this embodiment, the first transparent layer 720 develops a black color when irradiated with a laser beam 10, and is printed. The first transparent layer 720 develops a color when irradiated with a laser beam, and is therefore also called a laser coloring sheet or a laser coloring oversheet. The first transparent layer 720 may have a function of protecting the first surface of the card 700.

[0050] The glass particle layer 730 includes a first ink. The color of the first ink is typically transparent. The first ink may include a colorant. In this case, the color of the first ink combined with a second ink (described below) becomes the background color on the first side of the card 700.

[0051] The first colored layer 740 includes a second ink, the color of which becomes the background color on the first side of the card 700. If the first ink of the glass particle layer 740 is a clear ink, the color of the second ink will be the major contributor to the background color on the first side of the card 700.

[0052] In financial cards and the like, a color that imitates a metallic tone such as silver or gold is preferably used for the first ink and / or the second ink.

[0053] The core layer 710 is formed of a plastic resin etc. The color of the core layer 710 is typically white.

[0054] As described in the first, second, and third embodiments, the glass particle layer 730 is used, so that the card 700 does not deform or bubble even when the first surface side of the card 700 is irradiated with the laser light 10. Conventionally, in order to prevent deformation and foaming of the card 700, a window area (an area where the white color of the core layer is exposed, also called a blank area) was required in printing with laser light, in which the color of the core layer appears. However, the embodiment of the present invention does not require a window area. Therefore, the embodiment of the present invention realizes printing with laser light without impairing the design due to its configuration. Furthermore, since printing with laser light has superior abrasion resistance compared to thermal printing, printing with laser light is particularly useful for cards that are used for many years. Furthermore, since financial cards using metallic colors such as silver and gold are prone to deformation and foaming due to irradiation with laser light, the embodiment of the present invention is more suitable for financial cards.

[0055] The laminate 799 further includes a second transparent layer 750 and a second colored layer 760. The second transparent layer 750 is also called an oversheet. When the second transparent layer 750 is not to be colored by irradiation with laser light, the second transparent layer 750 does not have to be a transparent layer that develops color. On the other hand, when the second transparent layer 750 is to be colored, the second transparent layer 750 can be a transparent layer that develops color by irradiation with laser light, similar to the first transparent layer 720.

[0056] The second colored layer 760 contains a third ink. The color of the third ink becomes the background color on the second side of the card 700. In financial cards and the like, the magnetic stripe 770 is often concealed, and the third ink is a metallic color with high light-blocking properties, similar to the second ink. For example, a silver or gold ink is used as the third ink.

[0057] Laser printing may also be applied to the second surface of the card 700. On the second surface, printing is applied by peeling off the second colored layer 760 by irradiating it with laser light. When peeling is performed, the color of the core layer, typically white, appears in the portion irradiated with the laser light, and printing is performed. Note that by disposing a sheet-like layer of a color different from the color of the core layer at least in the printing portion between the core layer and the second colored layer 760, the color that appears by printing can be the color of the sheet. In another embodiment, when the second transparent layer 750 is made of a material that develops color by irradiation with laser light (laser coloring sheet), the color that appears by printing can be the color developed by the second transparent layer 750, typically black.

[0058] The laser light 12 shows an example in which the second colored layer 760 is peeled off, or an example in which the second colored layer 760 is peeled off and further the second transparent layer made of a color-producing material is colored.

[0059] In this embodiment, the second colored layer 760 is disposed on the surface of the second side of the card 700, but in another embodiment, the second transparent layer 750 may be disposed on the surface, and the second colored layer 670 may be disposed on the surface of the second transparent layer 750 facing the core layer 710.

[0060] In other embodiments, a glass particle layer is disposed between the second transparent layer 750 and the second colored layer 760, or between the second transparent layer 750 and the core layer 710, thereby preventing deformation or foaming of the card 700 on the second side as well.

[0061] [Second embodiment of card using laminate] 8 shows an embodiment of a card 700 using a laminate 799 of the present invention having two core layers. The second embodiment of the card using the laminate has a configuration similar to that of the first embodiment of the card using the laminate, but the laminate 799 of the second embodiment differs from the first embodiment in that a second core layer 810 is disposed on the second surface side of the first core layer 710.

[0062] In this embodiment, by arranging the first core layer 710 and the second core layer 810, it is possible to prevent deformation such as warping of the laminate 799.

[0063] In another embodiment, the first transparent layer 720, the first colored layer 740, the glass particle layer 730, and the first core layer 710 are arranged as a first layer set, and the same layer set is arranged on the second surface side. More specifically, the second core layer 810, the second glass particle layer, the second colored layer 760, and the second transparent layer 750 are arranged from the first core layer 710 toward the second surface, that is, the layers can be arranged so as to be symmetrical in the thickness direction of the laminate, based on a line (a line formed by the surface where the first core layer 710 and the second core layer 810 face each other) that extends horizontally from the center in the thickness direction of the cross section of the laminate. Even if each layer is deformed due to heat or temperature changes during molding, the layers arranged as mirror images have the same composition or a similar composition, so that the layers deform in the same way, and deformation such as warping of the laminate 799 can be more appropriately prevented.

[0064] [Card Example] FIG. 9 shows a first and second embodiment of a card using a laminate. In this embodiment, the card 900 is typically a credit card, a bank cash card / debit card, a transportation IC card, an electronic money-related card, or the like, and has a front surface 910 and a back surface 950. On the front surface 910, a card brand name 910, a card brand mark 920, a counterfeit prevention mark 925, and the like are printed. The mark 920 is printed in a window area (white portion), but this is an example, and the mark may be printed without providing a white portion. The counterfeit prevention mark 925 is typically printed by a hologram or the like, and is useful for counterfeit prevention. The front surface 910 may have a contact IC chip 930.

[0065] Printed on the back side 950 are the card owner's name 955, a card number 960 that is unique to each card, and the card's expiration date 965. The back side 950 may also include a signature area 970 for the card owner and a magnetic stripe 975.

[0066] In this embodiment, the layers of the front surface 910 and the back surface 950 can correspond to the second colored layer 760 and the first transparent layer 720 of FIG. 7 and FIG. 8, respectively, or vice versa. That is, when the layer of the front surface 910 is the colored layer 760, the second colored layer 760, the second transparent layer 750, (the second core layer 810), the core layer 710, the glass particle layer 730, the first colored layer 740, and the first transparent layer 720 are arranged in this order from the front surface 910 to the back surface 950. On the other hand, when the layer of the front surface 910 is the first transparent layer 720, the first transparent layer 720, the first colored layer 740, the glass particle layer 730, the core layer 710, (the second core layer 810), the second transparent layer 750, and the second colored layer 760 are arranged in this order from the front surface 910 to the back surface 950.

[0067] In this embodiment, a part or all of the printing may be achieved by printing using laser irradiation as described in the above embodiment.

[0068] [others] The laminate described in each of the above examples can be used for a booklet containing variable information such as a passport. When used for a booklet, the laminate described in each of the above examples can be arranged on an information page called a data page, which records personal information. Since the layer structure containing glass particles is difficult to imitate, it is possible to prevent counterfeiting. In addition, since the information page has an electronic information storage medium, it can be used as an identity document in a passport or a travel document. In addition, when manufacturing an information page having the laminate of this embodiment, it can be manufactured through a multi-face lamination process. The multi-face lamination process refers to a process in which a layer in which a glass particle layer is printed on a core layer (also called a base layer) and a transparent layer (laser coloring layer) is laminated (also possible in a temporary pasting state) on the printed sheet are arranged in a plurality of laminates to form a single sheet. For example, 32 laminates are arranged on a plane in 4 rows and 8 columns, and punching marks (lines, etc.) are applied to the connection parts of each laminate so that these laminates can be punched out later, and the 32 laminates are formed into a single sheet. Since the laminate is in a multi-sided state, it can be shipped from the factory as it is, and when printing personal information on the laser coloring layer, it can be printed at a specific location other than the factory. By being able to process at a specific location, it is possible to prevent the leakage of personal information. In this embodiment, 32 laminates are an example, and one sheet may be formed with another suitable number of laminates.

[0069] The transparent layer in the above examples also includes layers that are colored and semi-transparent.

[0070] The "electronic information storage medium" described in the claims corresponds to the "IC chip" and "magnetic stripe" described in the above embodiment.

[0071] Regarding each of the embodiments described above, a part or all of each embodiment may be combined to be realized as a single embodiment.

[0072] The above-described embodiments are merely examples for explaining the present invention, and the present invention is not limited to these embodiments. The present invention can be embodied in various forms without departing from the gist of the present invention. [Explanation of symbols]

[0073] 100: Laminate 110: Core layer 120: Transparent layer 130: Glass particle layer 140: Colored layer 670: Second colored layer 700: Card 710: Core layer 720: First transparent layer 730: Glass particle layer 740: First colored layer 750: Second transparent layer 760: Second colored layer 765: First magnetic stripe 770: Second magnetic stripe 799: Laminated body 810: Second core layer

Claims

1. A transparent layer, a glass particle layer containing glass particles; An electronic information storage medium; Equipped with The card, wherein the glass particle layer further comprises a first ink.

2. Further comprising a core layer, The card of claim 1 , wherein the glass particle layer is disposed between the core layer and the transparent layer.

3. Further comprising a colored layer colored with a second ink, The card of claim 2 , wherein the color layer is disposed between the core layer and the transparent layer, or the transparent layer is disposed between the color layer and the core layer.

4. The card described in claim 3, wherein the second ink includes a colorant.

5. Further comprising an additional transparent layer, 5. The card according to claim 2, wherein the additional transparent layer is disposed on a surface side of the core layer opposite to the surface on which the transparent layer is disposed.

6. A card described in any one of claims 2 to 5, further comprising another core layer on the side of the core layer on which the glass particle layer is not disposed.

7. A card described in any one of claims 1 to 6, wherein the first ink includes at least a transparent ink or a colored ink.

8. A card described in any one of claims 1 to 7, wherein the ratio of the weight of the glass particles in the glass particle layer to the weight of the first ink after solidification is 1 or less.

9. A card as claimed in any one of claims 1 to 8, wherein at least a portion of the glass particles in the glass particle layer are coated with a metal or metal oxide.

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