WO2009133876A1

WO2009133876A1 - Retroreflector label sheet and article to which retroreflector label sheet is bonded

Info

Publication number: WO2009133876A1
Application number: PCT/JP2009/058329
Authority: WO
Inventors: 久美子鈴木; 文人小林; 紗和子木本; 博昭島根
Original assignee: 共同印刷株式会社
Priority date: 2008-04-30
Filing date: 2009-04-28
Publication date: 2009-11-05
Also published as: KR101204810B1; TW200951901A; JPWO2009133876A1; JP5161960B2; CN102016960B; CN102016960A; HK1154695A1; TWI394111B; KR20100117131A

Abstract

Provided is a retroreflector label sheet and an article to which a retroreflector label sheet is boded wherein a judgment can be made whether a label sheet has been re-stuck or not by observing the conditions on the surface, unsealing can be confirmed, and forgery and camouflage can be inspected. The retroreflector label sheet (1) consists of a base layer (10), a retroreflective layer (20) that is laminated on one surface of the base layer (10) and can retroreflect a detection light, that has entered from a fixed direction, in the same direction, an adhesive layer (30) laminated on the other surface of the base layer (10) and adhering to an article, an easy-to-destroy layer (40) provided at least partially on the front surface of the retroreflective layer (20), and background information (50) consisting of designs or characters formed on the front surface of the base layer (10) on the side of the adhesive layer (30) by printing.

Description

Retroreflector label sheet and article to which retroreflector label sheet is fixed

The present invention relates to a retroreflector label sheet, for example, an open type retroreflector label sheet in which glass beads (hereinafter collectively referred to as a photorefractive body) are exposed, and an article to which the retroreflector label sheet is fixed.

The retroreflector uses a reflection phenomenon in which light incident on, for example, a glass bead as a reflector returns to the incident direction again, and includes a glass bead layer that is a light refractor and a reflective layer provided therebelow. It is configured. The retroreflector includes a closed type in which a coating layer made of a colorless and transparent resin is formed on a glass bead, and an open type in which the glass bead is exposed.

Patent Document 1 discloses a technique for enhancing anti-counterfeiting by combining a retroreflector and a hologram. This retroreflector has a different color tone under natural light from various directions, such as sunlight and lighting, and under light with a uniform orientation, such as a car light. It is often used for traffic signs, armbands, work clothes, etc., because it is visible. Also, those with special reflected light are used to prevent counterfeiting of cash vouchers and certificates. For this anti-counterfeiting retroreflector, a closed-type retroreflector that is easy to print is often used.

Patent Document 2 discloses a technique for making a glass bead layer and a reflective layer easy to be destroyed so that reuse is impossible. This retroreflector uses the fact that recovery is difficult when the glass bead layer or reflective layer of the retroreflector collapses, and for checking the opening of boxes etc. for the purpose of preventing forgery, forgery, alteration, etc. And used as an opening confirmation seal.

JP 2000-272300 A JP 2003-29012 A

The retroreflector as shown in Patent Document 2 cannot be reused because the glass bead layer is destroyed when the retroreflective seal attached to the box or the like is peeled off. However, if an organic solvent such as alcohol is used or heated at the time of peeling, the adhesive strength of the adhesive layer of the retroreflector is weakened, and peeling becomes possible without breaking the glass bead layer or the reflecting layer. There was a risk of being used.

The present invention has been devised in view of the above problems, and does not detect the collapse of, for example, a glass bead layer or a reflective layer as a retroreflector, but whether or not a label sheet is re-applied. Can be determined by observing the status of the printed layer applied to the surface of the retroreflector, and as a result, it can be confirmed whether it is unopened or already opened, and the product is counterfeited or forged. It is an object of the present invention to provide a retroreflector label sheet capable of determining whether or not it is necessary to inspect whether or not it is broken, and an article to which the retroreflector label sheet is fixed.

In order to achieve the above object, the present inventors have intensively studied. As a result, when an easily destructible layer formed of a substance having an easily destructible property against frictional force is provided on the glass bead exposed surface of the retroreflector, the easily destructible It was found that the layer peeled off with a slight force, and the present invention was completed.

That is, the retroreflector label sheet of the present invention is a retroreflective material that is laminated on one surface of the base material layer and the base material layer and can retroreflect the detection light in the same direction when the detection light enters from a certain direction. Layer, an adhesive layer that is laminated on the other surface of the base material layer and adheres to the article, and an easily destructible layer provided on at least a part of the surface of the retroreflective layer. A body layer, a holding layer that holds the photorefractive layer in a state in which the surface portion is exposed, and a reflective layer that is laminated on the surface opposite to the surface portion of the photorefractive body layer or laminated inside the holding layer; The easily breakable layer is formed of a material having breakability with respect to frictional force.
A specific example of the photorefractive material layer is a plurality of glass beads that are partially embedded and spread on the surface of a holding layer made of a thermoplastic resin laminated on a base material layer.

According to the above configuration, the release mount is bent so as not to bend the retroreflector label sheet, and is attached to the article so as not to shake the hand easily to the easily breakable layer. Thus, when pasting a retroreflector label sheet, an easily destructible layer is formed unless a force that is not normally applied is applied to the easily destructible layer formed of a substance having an easily destructible property against a frictional force. It will not collapse.

Here, fraudulent attempts to exchange for fake articles are made on articles with retroreflector label sheets affixed in a state where no collapse occurs in the easily breakable layer or articles contained in the articles. There is.

If there is a fraud in which an article with a retroreflector label sheet attached is exchanged, the retroreflector label sheet is peeled off from the genuine article and re-applied to the fake article. In addition, in the unlikely event that an injustice is made to replace a ROM or the like in an article that contains a ROM and the like in the container body and covers the cover, and a pasting reflector sheet attached to the mating surface of the container body and the lid Then, the retroreflector label sheet is peeled off from the genuine article and re-applied to the fake article. At this time, if an inadvertent force is applied to the retroreflector or the easily destructible layer is carelessly rubbed, the easily destructible layer is peeled off from the surface of the retroreflective layer.

When the retroreflective label sheet affixed to the article is rolled up and peeled off, a bending force is applied to the easily breakable layer of the retroreflector label sheet, and the easily breakable layer is formed of a material that easily breaks against frictional force. Thus, the easily breakable layer partially collapses and peels off. In particular, when a force that rubs the surface of the photorefractive material layer of the retroreflector is applied, the easily breakable layer peels off.

Therefore, if there is a suspicion that a genuine article has been forged, altered, forged, etc., by observing the condition of the easily destructible layer of the retroreflector label sheet attached to the article, It is possible to check the status of whether it is opened or not, and it is possible to detect whether forgery or forgery is performed from the collapse or dropout state of the easily breakable layer. When no collapse has occurred in the easily breakable layer, it is proved that the retroreflector label sheet is not rolled up, that is, the retroreflector label sheet is not reattached. In addition, when even a slight collapse occurs in the easily breakable layer, it is proved that the retroreflector label sheet has been rolled up, that is, the retroreflector label sheet has been reapplied. . Therefore, by checking the presence or absence of the easily breakable layer on the surface of the label sheet or the falling state, it is possible to confirm whether or not a force is applied to the retroreflector label sheet of the present invention and an intentional operation is applied to the article.

According to the above configuration, not detecting the collapse of the glass bead layer or the reflective layer of the retroreflector label sheet, but observing the state of the easily destructible layer applied to the surface of the retroreflector, Or whether it is already opened, and from this, it is possible to detect whether forgery or forgery is being performed.

The retroreflective label sheet having the above-described configuration may be formed of a transparent material having a color that is difficult to distinguish from this color when the easily breakable layer is transparent under natural light or the reflective layer is colored. preferable. With this configuration, it is not possible to recognize that an easily destructible layer has been formed even if an attempt is made to replace the article with the retroreflector label sheet attached, so that when the retroreflector label sheet is peeled off, Or the fingertip often rubs the easily breakable layer on the sheet surface. When a force by a nail or a fingertip is applied to the surface of the sheet, the easy-breaking layer collapses more significantly than when the retroreflector label sheet is rolled up without contacting the easily-breaking layer. Accordingly, since the easily breakable layer collapses and falls off, it can be more clearly confirmed that the retroreflector label sheet has been reapplied.

In order to examine the presence or absence of the easily breakable layer on the surface of the label sheet, strong light, for example, light through an optical lens or light having a uniform direction is applied to the retroreflector label sheet. Then, in the portion of the photorefractive material layer that is not covered with the easily destructible layer, the light incident on the photorefractive material layer is refracted and returned, so that the color of the reflective layer is emphasized and more vivid than the color seen under natural light. Looks like a color. On the other hand, when the easily breakable layer exists, the light that is refracted by the photorefractive material layer, reflected by the reflective layer, and returned is deflected by the easily breakable layer. For this reason, a contrast arises between the area | region where an easily breakable layer exists, and the area | region which does not have an easily breakable layer. In this way, the retroreflector is irradiated with strong light to check the presence or absence of the easily destructible layer, and based on the result, it can be determined whether or not the reuse action has been performed.
Therefore, according to the present invention, the detection light is scanned by the reader that emits the detection light, and the pattern of the transparent material is displayed as an image or is compared with the pattern stored in the reader in advance, thereby easily breaking the layer. Therefore, the presence or absence of the easily breakable layer on the surface of the label sheet or the drop-off state can be examined by a simpler inspection without taking an inspection method for determining whether or not the disintegration has occurred.

The retroreflector label sheet having the above configuration has a peeling / disintegrating layer between the base material layer and the pressure-sensitive adhesive layer, which peels and collapses when peeled from the state of being stuck to the article and remains in at least a part of the article. Is preferred. With this structure, when the retroreflective label sheet is peeled off after trying to replace the article with the retroreflective label sheet attached, the release collapsing layer peels and collapses, making the retroreflective label sheet unrecoverable. Thus, it can be seen that the retroreflector label sheet that has been re-applied is not smooth but uneven at a glance. In particular, the presence of the retroreflective layer hardens the label sheet and requires a stronger force to peel off. Therefore, the peeling collapse layer is also easily peeled and collapsed. That is, confirmation of whether it is unopened or already opened is easily determined by visual inspection of the smoothness of the retroreflector label sheet in addition to the detection of the easily breakable layer. Moreover, in the structure which has a peeling disintegration layer, since the total thickness of a label sheet becomes large, it becomes difficult to bend and it is hard to peel off easily. For this reason, in order to peel off the retroreflector label sheet, it is necessary to apply a greater force. When this force acts on the easily breakable layer, the easily breakable layer surely collapses and falls off. Therefore, the effect of preventing forgery and forgery is high.

In the retroreflector label sheet having the above-described configuration, it is preferable that the reflective layer generates a structural color due to light interference. The structural color is a color of a phenomenon in which light reflected from the upper surface of a thin film having a wavelength of light and light reflected from the lower surface interfere with each other to generate various colors depending on the viewing angle. In order to obtain a reflective layer that generates a structural color, for example, (1) the metal compound is formed as a single layer having a thickness as thin as the light wavelength (390 nm to 770 nm), and (2) the light wavelength as thin as the metal compound. (3) causing interference and scattering of light by fine grooves, protrusions, and fine particles. With this configuration, the ground color becomes camouflage, the easily breakable layer becomes difficult to see, and those who try to cheat replacing the article with the retroreflector label sheet attached become less aware of the presence of the easily breakable layer. . For this reason, the effect of forgery and forgery prevention is high.

It is preferable that the retroreflector label sheet having the above-described configuration is provided with a cut on the side of the retroreflective layer. With this configuration, the force applied to the retroreflector label sheet is dispersed when the remaining portion of the label sheet is peeled off from the release mount so as to leave the retroreflector label sheet on the release mount, and further included in the adhesive from the cut. Drying of the solvent is promoted, and the seal adheres strongly to the release sheet, so that it is possible to prevent co-up. In addition, when trying to peel off the retroreflector label sheet attached to the article in order to carry out fraud, it will be cut from the cut and spread to the peeling disintegration layer, making it unrecoverable. It is not possible to correct it, and the effect of preventing forgery and forgery is high.

In the retroreflector label sheet having the above-described configuration, it is preferable that the retroreflective layer is transparent, and background information having a design or characters is formed on any surface of the base material layer. With this configuration, the retroreflector label sheet shows the background information under natural light, making it difficult to understand the presence of the surface easily destructible layer. The probability of rubbing and breaking up increases, and the effect of preventing forgery and forgery is high.

According to the present invention, instead of detecting the collapse of, for example, a glass bead layer or a reflective layer as a retroreflector, whether or not the label sheet has been reapplied is applied to the surface of the retroreflector. This can be determined by observing the status of the print layer. As a result, it is possible to provide a retroreflector label sheet that can confirm whether it is unopened or already opened, and can determine whether it is necessary to inspect whether the article is counterfeited or forged. In addition, an article to which the retroreflector label sheet is fixed can be provided. Further, according to the present invention, it is difficult to make a counterfeit reflector sheet sheet, which is effective in preventing forgery and forgery.

It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 1st Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 2nd Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 3rd Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 4th Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 5th Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 6th Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 7th Embodiment. It is a schematic sectional drawing which shows the retroreflector label sheet which concerns on 8th Embodiment. It is a top view of the retroreflector label sheet which concerns on 9th Embodiment. It is a schematic sectional drawing which concerns on 9th Embodiment and shows one form which provides a printing protective layer in the retroreflector label sheet corresponding to 1st Embodiment. It is a schematic sectional drawing which concerns on 9th Embodiment and shows the other form which provides a printing protective layer in the retroreflector label sheet corresponding to 1st Embodiment. The top view which shows the state of the sheet | seat before providing the circular half cut with respect to the retroreflector label sheet layer laminated | stacked and formed on the peeling mount, aligning the retroreflector label sheet of this invention, and peeling the label sheet remainder part It is. It is typical sectional drawing which shows the state which peeled the label sheet remainder part. It is a figure which shows the state used as labeling of the certificate affixed on the storage case of the control components. It is a figure which shows the state which used the label sheet | seat so that it might cover the joint surface of the storage case main body and cover of a control component. It is a figure which shows the state which affixed the label sheet on control boards, such as CPU, and the case side surface.

Hereinafter, embodiments of the retroreflector label sheet of the present invention will be described in detail with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the retroreflector label sheet 1 according to the first embodiment is laminated on one surface of a base material layer 10 and the base material layer 10, and the detection light is incident from a certain direction. Provided on at least a part of the surface of the retroreflective layer 20, the retroreflective layer 20 that can retroreflect the detection light in the same direction, the adhesive layer 30 that is laminated on the other surface of the base material layer 10 and adheres to the article. The background information 50 which consists of the design or character etc. which are formed in the surface by the side of the adhesion layer 30 of the base material layer 10 and the adhesion layer 30 by easy printing is comprised. In this embodiment, the background information 50 is configured to be visible from the front side of the retroreflector label sheet 1. That is, the retroreflective layer 20, the easily breakable layer 40, and the base material layer 10 are configured to be transparent. The background information 50 may be provided on the surface of the base material layer 10 on the retroreflective layer 20 side. When originality is given to the reflector label sheet 1, a specific design, trademark, or house mark may be used for the background information 50.

The base material layer 10 is a layer that supports the retroreflective layer 20, and a film made of polyester resin, polyolefin resin, cellulose resin, acrylic resin, or the like can be used.

The retroreflective layer 20 is laminated on the surface opposite to the surface portion of the photorefractive material layer 21, the holding layer 22 that holds the photorefractive material layer 21 in a state where the surface portion is exposed. And the reflective layer 23.

In this embodiment, the photorefractive material layer 21 is made of glass beads. The glass beads 21 are embedded so that a part is exposed on the surface side of the holding layer 22. In this embodiment, the reflective layer 23 is colorless or colored and transparent. The glass beads 21 are spheres for refracting incident light. The lower half is buried in the holding layer 22 and the remaining upper half is exposed to the air. The material of the glass beads 21 is not particularly limited, and BaO—SiO ₂ —TiO ₂ glass or BaO—ZnO—TiO ₂ glass can be used. The refractive index may be in the range of 1.9 to 2.2 which is usually used. In this embodiment, the refractive index of the glass beads 21 is around 1.9. The particle size of the glass beads 21 is desirably 38 μm to 50 μm or 45 μm to 90 μm. Although it is desirable that the glass beads 21 are spread in close contact with each other in an aligned state, the glass beads 21 may be slightly separated from each other. In order to give the reflector label sheet 1 originality, the glass beads 21 may be removed with respect to a circular or heart-shaped area at a constant pitch.

The holding layer 22 is a layer that holds the glass beads 21 and adheres and holds the base material layer 10 and the glass beads 21. The holding layer 22 has good adhesiveness to the glass beads 21 and is highly transparent resin such as polystyrene resin, polyester resin, acrylic resin, silicone resin, fluorine resin, polyamide resin, polyvinyl alcohol resin, polyurethane. It is preferable to apply a thermoplastic resin such as a resin, a polyolefin resin, a polycarbonate resin, or a polysulfone resin.

The reflective layer 23 is a layer that is provided along the lower surface side of the glass bead 21, that is, along the opposite side of the surface on which the glass bead 21 is exposed, and reflects light incident on the glass bead 21. The reflective layer 23 is a colorless or colored thin film, and here, a layer that generates a structural color by utilizing the interference of light by irradiation with natural light is employed. When the originality is given to the reflector label sheet 1, it can also be achieved by giving the structural color of the reflective layer 23 originality. The reflective layer 23 can be formed using a metal compound such as titanium oxide, bismuth oxide, zirconium oxide, silicon oxide, zinc oxide, zinc sulfide, and a mixture thereof as well as aluminum.

The reflective layer 23 that generates a structural color can be manufactured, for example, by alternately laminating a metal compound having a high refractive index of light and a compound having a low refractive index in the visible range shown below.
[Metal compounds with high refractive index of light]
Zinc sulfide (ZnS): 2.40
Titanium oxide (TiO ₂ ): 2.71 (rutile structure), 2.52 (antase structure)
Indium oxide (In ₂ O, In ₂ O ₃ ): 2.00
Tin oxide (SnO, SnO ₂ ): 1.90
Zirconium oxide (ZrO ₂ ): 2.40
Alumina (Al ₂ O ₃ ): 1.76
Magnesium oxide (MgO): 1.74
[Metal compounds with high refractive index of light]
Calcium fluoride (CaF ₂ ): 1.44
Magnesium fluoride (MgF ₂ ) 1.38
Sodium fluoride (NaF): 1.29
Silicon oxide (SiO ₂ ): 1.46

The thickness of the reflective layer 23 is preferably selected in a range where light reflected from the upper surface of the film and light reflected from the lower surface interfere, and in the case of a multilayer, it is selected from 300 to 600 nm. If the total thickness of the multilayer is less than 300 nm, the interference light is dull, and if it is thicker than 600 nm, the desired structural color cannot be obtained or the appearance color becomes cloudy. The thickness of one layer is preferably in the range of 100 to 200 nm. Moreover, it is preferable to add gradation within the range of one layer thickness. In order to exhibit a structural color with a single layer, the metal compound thin film described above may be used. In the case of a single layer, the film thickness is preferably in the range of 100 to 600 nm, and gradation may be added within this layer thickness range.

The adhesive layer 30 is preferably formed using a highly transparent adhesive. For example, a polyester-type adhesive, an acrylic adhesive, a urethane-type adhesive, and a vinyl oxide-type adhesive can be mentioned. Note that a release sheet (not shown) that peels off the adhesive layer 30 before use to expose the adhesive layer 30 may be further attached to the lower surface of the adhesive layer 30.

The easily breakable layer 40 is formed of a material having a breakable property against a frictional force. The thickness of this substance is preferably 0.5 to less than 5 μm, and more preferably in the range of 1 to 3 μm or less. Ink can be used for the easily breakable layer 40 made of a material having easy breakability against frictional force. As for the component of this ink, for example, it is desirable to use only a dye as a colorant. Examples of the binder resin include water-based inks containing a water-soluble polymer and an emulsion resin. For example, polyvinyl alcohol, polyethylene oxide, or sodium polyacrylate can be used as the water-soluble polymer, and vinyl acetate emulsion, ethylene vinyl acetate emulsion, acrylic emulsion, acrylic styrene emulsion, or vinylidene chloride emulsion can be used as the emulsion resin. it can. As this ink, for example, an ink that is easily peeled off when a character is written on a board with a marker and rubbed after being dried is mentioned. The easily breakable layer 40 can be formed by various printing methods. In this embodiment, the easily breakable layer 40 is made of a transparent material having a color that is more transparent under natural light or difficult to distinguish from this color when the reflective layer is colored.

The background information 50 is such that the retroreflective layer is transparent and has a design or characters on any surface of the base material layer 10. Since the background information 50 can be seen under natural light, a design for making the easily breakable layer 40 difficult to see can be adopted, or a mark or trademark that can provide proof power can be adopted. When strong light is applied to the retroreflector label sheet 1, the transparent retroreflective layer 20 is totally reflected by the retroreflective function, and at this time, the background information 50 becomes invisible. Therefore, if a part of the reflective layer 23 of the retroreflective layer 20 is removed so that there is a small design without glass beads, the background information 50 can be seen in the portion leaking from the entire reflection, and hidden advertisements and other landmarks Available as

According to the above configuration, the easily destructible layer 40 does not collapse unless a force that is not normally applied is applied to the easily destructible layer formed of ink having an easily destructible property against a frictional force. The release mount is bent so that the retroreflector label sheet is not bent, and it is attached to the article so as not to rub the easily breakable layer. When attempting to cheat to replace an article with a retroreflector label sheet attached, the retroreflector label sheet is peeled off from the genuine article and reattached to the fake article. Peel off. Therefore, by observing the state of the easily breakable layer, it is possible to confirm the state of whether it is unopened or already opened, and from this, it is possible to detect whether forgery or forgery is being performed.

The retroreflector label sheet 1 of the first embodiment described above is configured so that the background information 50 can be seen through the easily breakable layer 40, the retroreflective layer 20, and the base material layer 10 under natural light. The layer 23 may be made opaque, and in this case, the background information 50 is not provided. Moreover, although the easily breakable layer 40 is formed of the transparent ink, it may be formed of an opaque ink. In this case, it is preferable to color the reflective layer 23 and form the easily breakable layer 40 with a transparent ink having a color that is difficult to distinguish from this color.

(Second Embodiment)
As shown in FIG. 2, the retroreflector label sheet 1 A according to the second embodiment is laminated on one surface of the base material layer 10 and the base material layer 10, is transparent, and the detection light enters from a certain direction. Sometimes provided on a part of the surface of the retroreflective layer 20A, a retroreflective layer 20A that can retroreflect the detection light in the same direction, an adhesive layer 30 that is laminated on the other surface of the base material layer 10 and adheres to the article. The background information 50 which consists of a design or a character etc. on the surface at the side of the adhesion layer 30 of the obtained easily breakable layer 40 and the base material layer 10 is comprised.
The retroreflective layer 20 includes a photorefractive layer 21 laid with glass beads, a holding layer 22 that holds the photorefractive layer 21 in a state in which the surface portion is exposed, and a side opposite to the surface portion of the photorefractive layer 21. The reflective layer 23A is laminated on the surface of the substrate or inside the holding layer 32. The easily breakable layer 40 is formed of an ink that is easily breakable with respect to frictional force, and is transparent under natural light or has a color that is difficult to distinguish from this color when the reflective layer is colored. It is formed by.

The retroreflector label sheet 1A is different from the first embodiment in the reflective layer 23A. The reflective layer 23 A is provided at the focal position of the glass bead 21, and the focal position is determined by the refractive index of the glass bead 21. In this embodiment, since the refractive index of the glass beads 21 is around 2.2, the reflective layer 23 A is embedded in the holding layer 22 away from the glass beads 21.
Other configurations are the same as those in the first embodiment, and corresponding components are denoted by reference numerals, and description thereof is omitted. The operation and effect are the same as those in the first embodiment.

(Third embodiment)
As shown in FIG. 3, the retroreflector label sheet 1 B according to the third embodiment is laminated on one surface of the base material layer 10 and the base material layer 10, is transparent, and the detection light is incident from a certain direction. Sometimes the retroreflective layer 20 that can retroreflect the detection light in the same direction, the adhesive layer 30 that is laminated on the other surface of the base material layer 10 and adheres to the article, and between the base material layer 10 and the adhesive layer 30 The peel-disintegrating layer 60 formed on the surface, the easily breakable layer 40 provided on a part of the surface of the retroreflective layer 20, and the background information 50 made of a design or characters on the surface of the base material layer 10 on the adhesive layer 30 side. And is configured. The retroreflective layer 20 has the same configuration as that of the first embodiment, and includes a photorefractive layer 21 in which glass beads are spread, and a holding layer 22 that holds the photorefractive layer 21 in a state in which the surface portion is exposed. The reflective layer 23 is laminated on the surface opposite to the surface portion of the photorefractive material layer 21 or laminated inside the holding layer 32.

This retroreflector label sheet 1B is different from that of the first embodiment in that it has a peeling / disintegrating layer 60. The peeling / disintegrating layer 60 is a layer formed by laminating a plurality of thin layer films with a weak adhesive force, and when the shearing force from the side is applied, the interface peeling easily occurs and the layer films are dissociated. . Here, the part which layer films dissociate exists in the part except the periphery of a label sheet.
Other configurations are the same as those in the first embodiment, and corresponding components are denoted by reference numerals, and description thereof is omitted. The operation and effect are the same as those in the first embodiment.

The peeling / collapse layer 60 is a layer that peels and collapses when the retroreflector label sheet 1B is peeled from a state where the retroreflector label sheet 1B is adhered to the article (not shown) and remains on at least a part of the article (not shown).
According to this configuration, when trying to perform an injustice to replace the article with the retroreflector label sheet attached, the retroreflector label sheet has become unrecoverable when the retroreflector label sheet is peeled off. I understand that. When the re-sticking is performed, not only the collapse and drop of the easily breakable layer 40 but also the surface of the retroreflector label sheet 1 B is not smooth and exhibits irregularities that can be clearly seen. By observing this situation, it is possible to confirm whether it is unopened or already opened, and it is possible to detect whether forgery or forgery is being performed.

(Fourth embodiment)
As shown in FIG. 4, the retroreflector label sheet 1 C according to the fourth embodiment is laminated on one surface of the base material layer 10 and the base material layer 10, is transparent, and the detection light is incident from a certain direction. Sometimes the retroreflective layer 20A that can retroreflect the detection light in the same direction, the adhesive layer 30 that is laminated on the other surface of the base material layer 10 and adheres to the article, and between the base material layer 10 and the adhesive layer 30 The peel-disintegrating layer 60 formed on the surface, the easily breakable layer 40 provided on a part of the surface of the retroreflective layer 20A, and the background information 50 made of a design or characters on the surface of the base material layer 10 on the adhesive layer 30 side. And is configured.
The retroreflective layer 20 has the same configuration as that of the second embodiment, and includes a photorefractive layer 21 in which glass beads are spread, and a holding layer 22 that holds the photorefractive layer 21 in a state where the surface portion is exposed. The reflective layer 23 A is laminated on the surface portion of the base material layer 10.

This retroreflector label sheet 1 C is different from the second embodiment in that it has a peeling collapse layer 60. Other configurations are the same as those of the second embodiment, and corresponding components are denoted by reference numerals, and description thereof is omitted. Actions and effects are the same as those of the third embodiment.

(Fifth to eighth embodiments)
Fifth to eighth embodiments are shown in FIGS. The retroreflector label sheet 1D of the fifth embodiment shown in FIG. 5 is different from the first embodiment in the photorefractive layer 21D of the retroreflective layer 20D. The retroreflector label sheet 1E of the sixth embodiment shown in FIG. 6 is different from the second embodiment in the photorefractive material layer 21E of the retroreflective layer 20E. The retroreflector label sheet 1F of the seventh embodiment shown in FIG. 7 is different from the third embodiment in the photorefractive material layer 21F of the retroreflective layer 20F. The retroreflector label sheet 1G of the eighth embodiment shown in FIG. 8 is different from the fourth embodiment in the photorefractive material layer 21G of the retroreflective layer 20G.
These photorefractive material layers 21D to 21G are not optical beads but molded optical bodies in which convex spherical surfaces are arranged on both surfaces, and have substantially the same functions as retroreflective layers formed by laying glass beads in a regular row. Is obtained. Other configurations are the same as those of the corresponding embodiment, and thus the same reference numerals are given and description thereof is omitted.

(Ninth embodiment)
FIG. 9 shows a top view of the retroreflector label sheet according to the ninth embodiment. This retroreflector label sheet is the retroreflector label sheet 1 according to the first to eighth embodiments described above. , 1A to 1G, a print protective layer 70 is provided around the surface of the retroreflective layer. FIG. 10 shows a case where the easily breakable layer 40 of the retroreflector label sheet 1 according to the first embodiment shown in FIG. 1 is formed so as to extend to the periphery of the label sheet. 1, the print protective layer 70 is provided on the easily breakable layer 40. FIG. 11 shows a case where the easily breakable layer 40 of the retroreflector label sheet 1 according to the first embodiment shown in FIG. 1 is formed away from the periphery of the label sheet. This retroreflector label sheet 1, the print protective layer 70 is provided on the retroreflective layer 20. The print protective layer 70 can be similarly provided for the

retroreflector label sheets

1 and 1A to 1G according to the second to eighth embodiments.

The print protective layer 70 prevents the easily breakable layer 40 from collapsing due to an applied force or the like due to a sheet having a retroreflector label sheet arranged in an array state on the release mount and being stacked during transportation. It is effective for. By forming the print protection layer 70, it is possible to avoid a legitimate operator from inadvertently touching the easily breakable layer 40 in handling, so that it is possible to improve the accuracy of counterfeiting and forgery discovery.

The printing protective layer 70 is preferably printing ink or thermoplastic resin. Examples of the thermoplastic resin include polystyrene resin, polyester resin, acrylic resin, silicone resin, fluorine resin, polyamide resin, polyvinyl alcohol resin, polyurethane resin, polyolefin resin, polycarbonate resin, and polysulfone resin. . By providing the print protective layer 70, the easily breakable layer 40 increases in thickness and is difficult to collapse. The print protective layer 70 preferably has a total thickness of 5 μm or more with the easily breakable layer 40.

Transparent ink made of Toyo Ink's FD Carton ACE Matte OP varnish is used on the surface of the retroreflector (exposed surface of the glass beads) whose color tone is visible when the light is reflected on the reflective layer, and translucent by letterpress printing. An easily breakable layer of the sex character “Sample” was formed. Two types of easily breakable layers having a thickness of 3 μm and 5 μm were used.
Retroreflective layers having respective easily breakable layers having different layer thicknesses were punched into a circle having a diameter of 1 cm, and attached to a box as a retroreflector label sheet. The letter “Sample” on the retroreflector label sheet is difficult to see under natural light, but when irradiated with strong light, the letter “Sample” appears to appear. Next, the seal was peeled off from the box, and again attached to the box, and the seal was observed by irradiating strong light. In the case of a seal having an easily destructible layer with a thickness of 3 μm, the characters “Sample” have been scraped off, and in the region where the characters have been scraped, the “Sample” characters have emerged in a collapsed state that can hardly be read. Looked. On the other hand, in the case of a seal having an easily breakable layer having a thickness of 5 μm, the characters “Sample” clearly appeared. In addition, although this observation was repeated 20 times, all had the same result.

Colored transparent ink (FD Carton made by Toyo Ink) with a color tone different from the color tone seen when light is reflected on the reflective layer on the glass beads of the retroreflector (the color is visible when the light is reflected on the reflective layer) The letters “Sample” were printed with ACE mat OP varnish + Sakuramiya Chemical Microlith Blue (3% relative to the total amount).
The obtained retroreflector having a colored easily breakable layer was punched into a circle having a diameter of 1 cm, and attached to a box as a retroreflector label sheet.
In the same manner as in Example 1, a seal peeling test was performed. The fact that the “Sample” characters were removed was only slightly visible under natural light, but the color of the reflective layer was emphasized when irradiated with strong light, and the “Sample” characters were broken. Was clearly confirmed. In addition, although this observation was repeated 20 times, all had the same result.

Thickness by typographic printing with warm colored colored transparent ink on the surface (exposed surface of the glass beads) of the retroreflector (so-called structural color that changes to the rainbow color depending on the viewing angle when the light is reflected on the reflective layer) An easily breakable layer of the characters “Sample” was formed at 3 μm.
A retroreflector having an easily destructible layer was punched into a circle having a diameter of 1 cm and attached to a box as a retroreflector label sheet. The letter “Sample” of the retroreflector was only slightly visible under natural light. When irradiated with intense light, the letter “Sample” could not be confirmed when the structural color of the reflective layer of the retroreflector appeared warm, and the reflective layer appeared to have a color tone other than the warm color by tilting the retroreflector. I was able to confirm. Next, when the seal was peeled off and the seal was observed by irradiating with strong light, when the structural color of the reflective layer appeared to be a color tone other than the warm color system in the area where the letters “Sample” were cut , It appeared to appear in a state where the characters collapsed. In addition, although this observation was repeated 20 times, all had the same result.

On the glass beads of the retroreflector of Example 3, a warm colored colored transparent ink (FD Carton ACE Matte OP varnish made by Toyo Ink + micro rethread made by Sakuranomiya Chemical (3% of the total amount), a star-shaped mark, Furthermore, the characters “Sample” were printed with a thickness of 3 μm using the transparent ink used in Example 1.
The obtained retroreflectors having two types of printing were punched into a circle having a diameter of 1 cm and pasted on a box as a retroreflector label sheet. This retroreflector label sheet was only visible as a star mark under natural light. Next, a seal peeling test was performed.
When the seal was observed by irradiating strong light, the structure color was emphasized, and in the area where the characters “Sample” were cut off, the characters “Sample” emerged in a collapsed state that could hardly be read. I saw. In addition, when the structural color of the reflective layer appeared to be a color other than the warm color, the star-shaped mark appeared in a collapsed state. In addition, although this observation was repeated 20 times, all had the same result.

Then, the manufacturing method of the retroreflector label sheet of this invention is demonstrated easily. Here, the retroreflector label sheet which has an easily breakable layer on a glass bead is demonstrated.
The manufacturing process of the retroreflector label sheet basically includes a glass bead fixing process, a reflective layer forming process, a base material layer attaching process, and a film peeling process. A specific manufacturing method will be described below.
(1) Production of Retroreflective Label Sheet with Single-Layer Reflective Layer A polyethylene resin is applied to the upper surface of a film such as a PET film, and glass beads are sprayed in an aligned manner thereon and dried. As a result, the lower hemisphere of the glass beads is buried in the polyethylene resin (glass beads fixing step). Next, a thin film of a metal compound is deposited on the exposed upper surface of the glass beads within a range of 100 to 600 nm (reflection layer forming step). Then, a polyethylene resin is applied to the base material layer laminated on the release sheet via the adhesive layer, and this is used as a holding layer and bonded to the holding layer and the reflective layer (base material layer attaching step). Finally, PET A film such as a film and a polyethylene resin are peeled off (film peeling step).
Since the surface of the glass beads has irregularities, the thickness of the thin film of the metal compound changes, and a gradation is given.

(2) Retroreflective label sheet having a multilayer reflective layer Apply polyethylene resin to the upper surface of a film such as a PET film, spray glass beads on it, and dry the lower hemisphere of the glass beads in the polyethylene resin. Buried (glass beads fixing process). Next, a plurality of metal compound thin films (in the range of 100 to 200 nm) are vapor-deposited on the exposed upper surface of the glass beads to form a multilayer reflective layer (reflection layer forming step). And a polyethylene resin is apply | coated to the base material layer laminated | stacked on the peeling sheet through the adhesion layer, this is made into a retention layer, and it bonds together to this retention layer and said reflection layer (base material layer pasting process), and the last A film such as a PET film and a polyethylene resin are peeled off (film peeling step).

When the retroreflector label sheet having an easily breakable layer on the obtained glass beads is a specific shape, for example, a circular label sheet, only the circular label sheet 1 is aligned on the release sheet 80. A sheet is used (see FIG. 12). The retroreflector label sheet 1 in which only the label sheet remains on the release sheet 80 can be obtained by making a notch 81 in the form of a label sheet on the glass bead 21 and peeling only the remaining circular label sheet 93. .
However, when the label sheet remaining portion 93 is peeled off (seals are lifted), the label sheet remaining portion 93 and the label sheet 1 are peeled together (hereinafter referred to as “co-raising”). In order to prevent the joints from rising, as shown in FIG. 12, a notch 81 is provided on the side of the label sheet 1 so as to straddle the label sheet residual portion 93. The notches 81 are provided at the periphery of the label sheet 1 so as to be diagonal to each other. This notch 81 is a half-cut from the surface of the retroreflector label sheet to the retroreflective layer 20.

By providing the notch 92 straddling the retroreflector label sheet 1 and the label sheet remaining portion 93, drying of the solvent contained in the adhesive is promoted from the notch, and the label sheet remaining portion 93 is peeled off from the peeling mount 80. At this time, the force applied to the retroreflector label sheet 1 is dispersed, and the retroreflector label sheet 1 strongly adheres to the peeling mount 80, so that it is possible to prevent co-up. Further, the notch 81 has an easy tearing effect for reattachment of the retroreflector label sheet 1 and has no recovery effect for reattachment, and therefore has an opening confirmation effect.

For example, a Thomson blade or a rotary blade can be used as a tooth for punching the retroreflector label sheet 1 by inserting the cut 91 and the label punching cut 92.

Next, an article to which any of the first to ninth retroreflector label sheets is fixed will be described.
The article to which the retroreflector label sheet is fixed may be a forgery prevention article or a container article containing the forgery prevention article. For example, in a gaming machine such as a pachinko machine or a pachislot machine, the probability of appearing is written in a PROM or the like, and this PROM or the like is housed in a box and cannot be easily touched. . In order to prevent the fraud which raises the probability of appearing by exchanging the PROM, by providing a retroreflector label sheet in the PROM itself or in the box containing the PROM etc. It can be determined whether or not it is necessary to inspect whether or not this is done.

When a retroreflector label sheet is affixed to the PROM itself, it is necessary to replace it with an illegal PROM or the like and reapply the retroreflector label sheet. In addition, when the retroreflector label sheet is attached so as to cover the mating surface of the box body containing the PROM or the like and the lid, the retroreflector label sheet is peeled off, the lid is opened, and the illegal PROM or the like It is necessary to paste the retroreflector label sheet so that it covers the mating surface of the box body and the lid again.
When the retroreflector label sheet of the present invention is reapplied, the easily breakable layer is destroyed. In addition, when there is a peel-disintegrating layer, the peel-disintegrating layer is also peeled and disintegrated, so that it is immediately determined that the reattachment has been performed. Accordingly, it is possible to confirm whether the package is unopened or opened, or confirm whether the article has been exchanged.

As an article to which the retroreflector label sheet is attached, control boards, board cases, electronic components such as PROMs accommodated in a board case of a control board unit of a gaming machine, a seal attached to a certificate attached to the case, etc. Can be mentioned.

FIG. 14 shows that a split 102 is provided for the certificate 101 attached to the case 101 that accommodates the control component to be illegally exchanged. For the split 102, a retroreflector label sheet 102 is used. As shown in this example, the background information 50 of the retroreflector label sheet 102 may be used as proof content, and the split 102 may be an ordinary seal.

FIG. 15 shows that the retroreflector label sheet 106 is attached as a split so as to cover the mating surface of the case main body 104 and the lid 105 that accommodates the control component to be illegally exchanged.

In FIG. 16, a first retroreflector label sheet 110 is pasted on a control board 109 having a CPU 107, a ROM 108, etc., which are subject to unauthorized exchange, and the control board 109 is placed on the lower case 111, and a second retroreflection is performed. The body label sheet 112 is covered with an upper case 113 attached to the side surface, and the lower case 111 and the upper case 113 are connected with bolts. In this example, the second retroreflector label sheet 112 is positioned between the side surface of the lower case 111 and the side surface of the upper case 113 in the assembled state. In this example, the first retroreflector label sheet 110 may be pasted on the CPU 107.

Since the retroreflector label sheet having the easily breakable layer according to the present invention is used as, for example, an anti-opening seal for a board storage case of a gaming machine, if it is illegally opened, the trace will be left, so that it is possible to prevent fraud Can be effectively used as

1,1A-1G Retroreflective label sheet 10

Base material layer

20,20A-20G Retroreflective layer 21 Glass beads 21D-21G Photorefractive material layer 22

Retaining layer

23,23A Reflective layer 30 Adhesive layer 40 Easily destructible layer 50 Background information 60 Peeling disintegration layer 70 Print protection layer 80 Peeling mount 91 Notch 92 Label punching cut 93 Label sheet remaining part

Claims

A base material layer;
A retroreflective layer laminated on one surface of the base material layer and capable of retroreflecting the detection light in the same direction when the detection light is incident from a certain direction;
An adhesive layer that is laminated on the other side of the base material layer and adheres to an article;
An easily breakable layer provided on at least a part of the surface of the retroreflective layer,
The retroreflective layer is laminated on a surface opposite to the surface portion of the photorefractive layer, a photorefractive layer, a holding layer that holds the photorefractive layer in a state where the surface portion is exposed, or the above A reflective layer laminated inside the holding layer,
The easily breakable layer is formed of a material having breakability with respect to frictional force.
Retroreflector label sheet.
The retroreflector according to claim 1, wherein the easily destructible layer is formed of a transparent material having a color that is difficult to distinguish from this color when the easily destructible layer is transparent under natural light or the reflective layer is colored. Label sheet.
The peeling collapse layer which peels and disintegrates by peeling from the state adhered to the said article | item between the said base material layer and the said adhesion layer, and remains in at least one part of the said article | item, It is Claim 1 of Claim 1. Retroreflector label sheet.
The retroreflector label sheet according to any one of claims 1 to 3, wherein the reflective layer generates a structural color by light interference.
The retroreflector label sheet according to any one of claims 1 to 4, wherein a cut is provided on a side of the retroreflective layer.
6. The photorefractive layer is made of a plurality of glass beads that are partially embedded and spread on the surface of a holding layer made of a thermoplastic resin laminated on the base material layer. A retroreflector label sheet according to any one of the above.
The retroreflective label according to any one of claims 1 to 6, wherein the retroreflective layer is transparent, and background information having a design or a character is formed on any surface of the base material layer. Sheet.
The retroreflector label sheet according to any one of claims 1 to 7, which is a forgery prevention seal.
An article to which the retroreflector label sheet according to any one of claims 1 to 8 is fixed.
The article according to claim 9, wherein the article is an anti-counterfeit article or a container article containing the anti-counterfeit article, to which the retroreflector label sheet is fixed.
The article according to claim 9, wherein the article is a combination of a plurality of members, and the retroreflector label sheet is fixed to the plurality of members so as to cover the joint.