CN102016960B - Retroreflective label sheets and articles with retroreflective label sheets fixedly attached - Google Patents

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

Retroreflective label sheets and articles with retroreflective label sheets fixedly attached

technical field

The present invention relates to a retroreflective label sheet, such as an open type retroreflective label sheet in which glass beads (hereinafter collectively referred to as light refractors) are exposed, and articles fixedly pasted with the retroreflective label sheet.

Background technique

A retroreflector utilizes a reflection phenomenon in which light incident on glass beads as a reflector returns to the incident direction again, and is composed of a glass bead layer as a light refractor and a reflective layer provided therebelow. The retroreflector includes a closed type in which a colorless and transparent resin coating is formed on glass beads, and an open type in which the glass beads are exposed.

Patent Document 1 discloses a technique of combining a retroreflector and a hologram to enhance anti-counterfeiting. The retroreflector is often used in traffic signs, armbands, work clothes, etc. by virtue of the following properties: the color tone of the retroreflector is seen under natural light from all directions such as sunlight and lighting light, and under consistent light such as car lights. Looks different in this nature. In addition, retroreflectors with special reflected light are also used in the anti-counterfeiting of banknotes, certificates, etc. Most of the anti-counterfeiting retroreflectors are sealed type retroreflectors that are easy to print.

Patent Document 2 discloses a technique for easily destroying a glass bead layer and a reflective layer to make them unusable. This retroreflector is used as an unsealing confirmation sheet based on the principle that once the glass bead layer and reflective layer of the retroreflector are damaged, it is difficult to recover, so that the box can be opened for the purpose of preventing counterfeiting, forgery, tampering, etc. confirm.

Patent Document 1: Japanese Patent Laid-Open No. 2000-272300

Patent Document 2: Japanese Unexamined Patent Publication No. 2003-29012

The retroreflector disclosed in Patent Document 2 cannot be reused because the glass bead layer is destroyed if the retroreflective sheeting or the like attached to the box or the like is peeled off. However, if an organic solvent such as alcohol is used or heated during peeling, the adhesive force of the adhesive layer of the retroreflector will be weakened, and the peeling can be performed without damaging the glass bead layer and the reflective layer, and it may be reused. .

Contents of the invention

The present invention was developed in view of the above-mentioned problems, and its purpose is to provide a retroreflective label sheet and an article on which the retroreflective label sheet is fixedly pasted. The retroreflective label sheet is not used as a retroreflector For example, the damage of the glass bead layer, reflective layer, etc., but by observing the condition of the printed layer applied on the surface of the retroreflector, it can be distinguished whether the label sheet is re-attached, and the result can be confirmed whether it is unopened or opened. Therefore, it can be judged whether it is necessary to check whether the article has been forged or counterfeited.

As a result of in-depth research by the present inventors to achieve the above object, it has been found that when a destructible layer formed by a material that is destructible to friction is provided on the exposed surface of the glass beads of the retroreflector, a small force will Will cause the fragile layer to peel off. The present invention has thus been accomplished.

That is, the retroreflective label sheet of the present invention includes: a substrate layer; a retroreflective layer laminated on one surface of the substrate layer, and capable of causing the detection light to reflect in the same direction when the detection light is incident from a predetermined direction. an adhesive layer laminated on the other side of the substrate layer and bonded to the article; and a breakable layer disposed on at least a portion of the surface of the retroreflective layer; the retroreflective layer comprising: a light refractor layer; a holding layer, which keeps the photorefractor layer in a state where the surface portion of the photorefractor layer is exposed; Inside, the breakable layer is formed of a substance that is breakable to frictional forces.

A specific example of the photorefractor layer is a plurality of glass beads held in a state of being partially embedded in the surface of a holding layer made of a thermoplastic resin laminated on the base layer and covered. .

According to the above configuration, the retroreflective label sheet is peeled without bending the release liner, and the retroreflective label sheet is attached to the article so that the hand does not touch the fragile layer at all. When the retroreflective label sheet is pasted in this way, the destructible layer will not be destroyed unless a force that is not normally applied is applied to the destructible layer formed of a substance that is destructible to frictional force.

Here, there is a possibility of fraudulent acts of attempting to replace an article with a counterfeit article on an article to which a retroreflective label sheet is stuck or an article housed in a state in which the destructible layer is not damaged at all.

If the fraudulent act of replacing the article to which the retro-reflective label sheet is pasted is performed, the retro-reflective label sheet is peeled off from the genuine article and reattached to the counterfeit article. In addition, for articles containing ROM and the like in the container body and covered with a lid, and a retroreflective label sheet is covered and pasted on the joint surface of the container body and the lid, if there is an illegal act of replacing the ROM, the retroreflective label will be removed. The sheet is peeled off from the genuine item and reattached to the counterfeit item. At this time, if an inadvertent force is applied to the retroreflector or the destructible layer is accidentally rubbed, the destructible layer will be peeled off from the surface of the retroreflective layer.

When the retroreflective label sheet attached to the article is turned up and peeled off, a bending force is applied to the destructible layer of the retroreflective label sheet, and the destructible layer is formed of a material that is destructible to frictional force, so the The easily destructible layer is partially destructed and peeled off. In particular, when a force is applied to rub the surface of the photorefractive body layer of the retroreflector, the breakable layer peels off.

Therefore, for genuine items, if there are suspicions of forgery, tampering, counterfeiting, etc., by observing the condition of the fragile layer of the retroreflective label sheet pasted on the item, it can be confirmed whether it is unopened or opened, so that It is possible to detect forgery or counterfeiting based on the state of damage or detachment of the destructible layer. When the destructible layer has not been damaged at all, it can be proved that the retroreflective label sheet has not been turned over, that is, the retroreflective label sheet has not been reattached. In addition, when the destructible layer is even slightly damaged, it can be proved that the retroreflective label sheet has been turned over, that is, the retroreflective label sheet has been reattached. Therefore, it can be confirmed whether a force is applied to the retroreflective label sheet of the present invention and whether an intentional operation has been performed on the article by investigating the presence or absence of the fragile layer on the surface of the label sheet or its peeling state.

According to the above structure, it is not by detecting the destruction of the glass bead layer, reflective layer, etc. of the retroreflective label sheet, but by observing the condition of the destructible layer applied on the surface of the retroreflective body, whether it is unopened or opened. Confirmation of the status of the item, so that it can be detected whether the item has been forged or counterfeited.

In the retroreflective label sheet having the above structure, it is preferable that the breakable layer is formed of a transparent material that is transparent under natural light or has a color that is difficult to distinguish from the color when the reflective layer is colored. According to this structure, even if an attempt is made to exchange the article to which the retroreflective label sheet is attached, since the easily destructible layer cannot be recognized, when the retroreflective label sheet is peeled off, fingernails and fingernails are often used. The tip rubs the fragile layer on the surface of the rubbing sheet. The breakage of the easily destructible layer will be more conspicuous compared with the case where the retroreflective label sheet is turned over without touching the destructible layer due to the force of the fingernail or fingertip applied to the surface of the sheet. Therefore, since the breakage and fall-off of the destructible layer are more conspicuous, it is possible to more clearly confirm that the retroreflective label sheet has been reattached.

In order to investigate the presence or absence of a breakable layer on the surface of the label sheet or its detachment state, the retroreflective label sheet is irradiated with strong light, such as light passing through an optical lens, or light in the same direction. Then, in the part of the photorefractor layer that does not cover the fragile layer, the light incident on the photorefractor layer is refracted and returned, so the color of the reflective layer is strengthened, and it can be seen compared with the color seen under natural light. to more vivid colors. On the other hand, if a destructible layer is present, light refracted at the photorefractor layer and reflected back at the reflective layer is deflected by the destructible layer. Therefore, a contrast is created between areas where the destructible layer is present and areas where the destructible layer is not present. In this way, it is possible to determine whether or not the reusing action has been performed based on the result of irradiating strong light on the retroreflective label sheet to check whether or not the fragile layer is present.

Therefore, according to the present invention, the detection light is scanned by a reader that emits detection light, and the image shows a pattern of a transparent substance, or is compared with a pattern stored in the reader in advance for identification, thereby eliminating the need to take a judgment in the fragile state. Whether the layer is damaged or not can be inspected more easily to investigate whether the fragile layer on the surface of the label sheet exists or whether it is peeled off.

The retroreflective label sheet having the above-mentioned structure preferably has a peeling damage layer between the base material layer and the adhesive layer, and the peeling damage layer is peeled from the state adhered to the article and remains on at least a part of the article. superior. According to this structure, when the retroreflective label sheet is peeled off in an attempt to exchange the article to which the retroreflective label sheet is attached, the peeling damage layer is peeled off, and the retroreflective label sheet cannot be restored. The retroreflective label sheet that has been re-pasted is not smooth and has unevenness at a glance. In particular, the presence of the retroreflective layer makes the label sheet hard and requires a greater force for peeling. Therefore, the peel-damaged layer is also easily damaged by peeling. That is, the confirmation of whether it is unopened or opened can be easily recognized by visually inspecting the smoothness of the retroreflective label sheet in addition to the detection of the breakable layer. In addition, since the total thickness of the label sheet becomes large in the structure having the peel-off layer, it is difficult to bend and does not easily peel off. Therefore, in order to peel off the retroreflective label sheet, a greater force needs to be applied, and when the force acts on the destructible layer, the destructible layer will be reliably broken and peeled off. Therefore, the effect of preventing forgery and counterfeiting is high.

In the retroreflective label sheet configured as described above, it is preferable that the reflective layer produces structural color by interference of light. Structural color refers to the phenomenon that the light reflected on the upper surface of the film at the wavelength of light interferes with the light reflected on the lower surface to produce various colors depending on the viewing angle. To make a reflective layer that produces structural color, for example, (1) a single-layer thin film made of a metal compound at the wavelength of light (390nm to 770nm), (2) a metal compound made of a metal compound at the wavelength of light (3) Using fine grooves, protrusions, and fine particles to interfere and scatter light. According to this structure, the ground color becomes a camouflage pattern, and the fragile layer becomes difficult to see, and it is even more difficult for a person who intends to do fraudulent activities such as replacing the article on which the retroreflective label sheet is attached to notice the existence of the fragile layer. Therefore, the effect of preventing forgery and counterfeiting is high.

In the retroreflective label sheet having the above-mentioned structure, it is preferable that a cut is provided on the side of the retroreflective layer. According to this structure, when the remaining part of the label sheet is peeled off from the release liner so that the retroreflective label sheet remains on the release liner, the force applied to the retroreflective label sheet is dispersed, and the adhesion is further promoted by the cut. By drying the solvent contained in the agent, the sheet is more firmly bonded to the peeling sheet, so it is possible to prevent co-lifting. In addition, when the retroreflective label sheet attached to the article is to be peeled off for fraudulent acts, it will be torn from the incision, spread to the peeled damaged layer and cannot be restored, so it is impossible to reattach the retroreflective sheet without damage. The label sheet has a high effect of preventing forgery and counterfeiting.

In the retroreflective label sheet having the above-mentioned structure, preferably, the retroreflective layer is transparent, and background information is formed on either surface of the base layer, and the background information has a pattern or characters. According to this structure, the background information of the retroreflective label sheet can be seen under natural light, so it is difficult to know that there is a destructible layer on the surface. Therefore, it is necessary to rub the destructible layer on the surface to destroy it when fraudulent behavior is attempted. The probability increases, and the effect of preventing counterfeiting and counterfeiting is high.

According to the present invention, instead of checking the damage of eg glass bead layer, reflective layer, etc. used as retroreflector, it is possible to distinguish whether the label sheet has been reattached by observing the condition of the printed layer applied on the surface of the retroreflector. As a result, it is possible to provide a retroreflective label sheet and an article to which the retroreflective label sheet is fixedly pasted. The status of the retroreflective label sheet can be confirmed whether it is unopened or opened, so that it can be judged whether inspection is necessary or not. Items have been forged or counterfeited. Moreover, according to this invention, since the counterfeit thing of a retroreflective body label sheet is hard to produce, it has the effect of preventing a forgery and a counterfeit.

Description of drawings

1 is a schematic cross-sectional view showing a retroreflective label sheet according to a first embodiment;

2 is a schematic cross-sectional view showing a retroreflective label sheet according to a second embodiment;

3 is a schematic cross-sectional view showing a retroreflective label sheet according to a third embodiment;

4 is a schematic cross-sectional view showing a retroreflective label sheet according to a fourth embodiment;

5 is a schematic cross-sectional view showing a retroreflective label sheet according to a fifth embodiment;

6 is a schematic cross-sectional view showing a retroreflective label sheet according to a sixth embodiment;

7 is a schematic cross-sectional view showing a retroreflective label sheet according to a seventh embodiment;

8 is a schematic cross-sectional view showing a retroreflective label sheet according to an eighth embodiment;

9 is a top view of a retroreflective label sheet according to a ninth embodiment;

Fig. 10 is a schematic cross-sectional view showing a mode of providing a printing protection layer on the retroreflective label sheet corresponding to the first embodiment according to the ninth embodiment;

11 is a schematic cross-sectional view showing another form of providing a print protection layer on the retroreflective label sheet corresponding to the first embodiment according to the ninth embodiment;

12 is a plan view showing the sheet state before the retroreflective label sheet of the present invention is formed by applying a circular half-cut to the retroreflective label sheet layer laminated on the release liner, and the remaining part of the label sheet is peeled off;

Fig. 13 is a schematic sectional view showing a state after peeling off the remainder of the label sheet;

Fig. 14 is a diagram showing a state in which a label sheet is used as a seal of a certificate attached to a housing case of a control part;

Fig. 15 is a diagram showing a state in which the label sheet is sealed and used so as to cover the mating surface of the control component housing body and the cover;

Fig. 16 is a diagram showing a state where a label sheet is attached to a control board such as a CPU and a side surface of a case.

Detailed ways

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

first embodiment

As shown in FIG. 1 , the retroreflective label sheet 1 of the first embodiment includes: a base material layer 10; The detection light can be retroreflected in the same direction; the adhesive layer 30 is laminated on the other side of the base material layer 10 and bonded to the article; the easily destructible layer 40 is arranged on the at least a part of the surface; and the background information 50 consisting of a pattern or characters formed by printing on the surface of the substrate layer 10 on the side of the adhesive layer 30 . In this embodiment, the background information 50 is configured so that it can be seen from the front side of the retroreflective label sheet 1 . That is, the retroreflective layer 20, the fragile layer 40, and the base layer 10 are transparent. In addition, the background information 50 may be provided on the surface of the base material layer 10 on the retroreflective layer 20 side. To make the retroreflective label sheet 1 original, a specific design, trademark, or house logo can be used on the background information 50 .

The base material layer 10 is a layer supporting 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 includes a photorefractor layer 21, a holding layer 22 that maintains the photorefractor layer 21 in a state where its surface is exposed, and a surface laminated on the side of the photorefractor layer 21 opposite to the surface. The reflective layer 23.

In this embodiment, the photorefractor layer 21 is made of glass beads. The glass beads 21 are embedded such that a part thereof is exposed to the surface side of the holding layer 22 . In this embodiment, the reflective layer 23 is colorless and transparent or colored and transparent. The glass bead 21 is a ball for refracting incident light, and its lower half is generally buried in the holding layer 22 , and the remaining upper half is exposed to the air. The raw material of the glass beads 21 is not particularly limited, and BaO-SiO ₂ -TiO ₂ glass and BaO-ZnO-TiO ₂ glass can be used. It is sufficient that the refractive index is in the range of 1.9 to 2.2 which is generally adopted. In this embodiment, the refractive index of the glass beads 21 is about 1.9. Preferably, the particle size of the glass beads 21 is 38 μm to 50 μm or 45 μm to 90 μm. It is preferable that the glass beads 21 are arranged closely to each other, but the glass beads 21 may be slightly separated from each other. It is also possible to remove the glass beads 21 at constant intervals on a circular or heart-shaped area in order to make the reflector label sheet 1 original.

The holding layer 22 holds the glass beads 21 and is a layer for bonding the base material layer 10 and the glass beads 21 to hold the glass beads 21 . As for the holding layer 22, it is preferable to use a resin with good adhesion to the glass beads 21 and high transparency, such as polystyrene resin, polyester resin, acrylic resin, silicone resin, fluororesin, polyester resin, etc. Thermoplastic resins such as amide resins, polyvinyl alcohol resins, polyurethane resins, polyolefin resins, polycarbonate resins, and polysulfone resins.

The reflective layer 23 is provided along the lower surface side of the glass bead 21 , that is, the side opposite to the exposed surface of the glass bead 21 , and is a layer for reflecting light incident on the glass bead 21 . The reflective layer 23 is a colored or colorless thin film, and here, a structural color is produced by irradiation of natural light and utilizing light interference. If the retroreflective label sheet 1 is to be original, it can also be realized by making the structural color band of the reflective layer 23 original. In addition to metal compounds such as titanium oxide, bismuth oxide, zirconium oxide, silicon oxide, zinc oxide, zinc sulfide, and mixtures thereof, aluminum may also be used to form the reflective layer 23 .

For example, the reflective layer 23 that produces structural color can be manufactured by alternately laminating a metal compound having a higher light refractive index and a compound having a lower light refractive index in the visible region shown below.

[Metal compounds with high refractive index]

Zinc sulfide (ZnS): 2.40

Titanium oxide (TiO ₂ ): 2.71 (rutile structure), 2.52 (anatase structure)

Indium oxide (In ₂ O, In ₂ O ₃ ): 2.00

Tin oxide (SnO, SnO ₂ ): 1.90

Zirconia (ZrO ₂ ): 2.40

Alumina (Al ₂ O ₃ ): 1.76

Magnesium oxide (MgO): 1.74

[Metal compounds with high refractive index]

Calcium Fluoride (CaF ₂ ): 1.44

Magnesium fluoride (MgF ₂ ): 1.38

Sodium fluoride (NaF): 1.29

Silicon oxide (SiO ₂ ): 1.46

Preferably, the layer thickness of the reflective layer 23 is within the range where the light reflected on the upper surface of the film and the light reflected on the lower surface interfere with each other, and it is selected within 300-600 nm when multi-layered. If the total layer thickness of the multilayers is less than 300 nm, the interference light will be dull, and if the total thickness is more than 600 nm, the desired structural color cannot be obtained or the appearance color will be cloudy. Preferably, the thickness of one layer is in the range of 100 to 200 nm. In addition, it is preferable to have layers within a range of layer thickness. In order to exhibit structural color in a single layer, a thin film of the above-mentioned metal compound may be used. In the case of a single layer, the film thickness is preferably in the range of 100 to 600 nm, and it is only necessary to have layers within this layer thickness range.

Preferably, the adhesive layer 30 is formed with an adhesive with high transparency. For example, polyester adhesives, acrylic adhesives, polyurethane adhesives, and ethylene oxide adhesives are mentioned. In addition, a release sheet (not shown) that is peeled off before use to expose the adhesive layer 30 may be attached to the lower surface of the adhesive layer 30 .

The destructible layer 40 is formed of a substance destructible to frictional force. The thickness of the substance is preferably 0.5 to 5 μm, more preferably 1 to 3 μm. As for the destructible layer 40 formed of a substance destructible to frictional force, ink can be used. The components of the ink, for example, preferably use only dyes as colorants. As for the binder resin, water-based inks containing water-soluble polymers and emulsion resins are mentioned. As for water-soluble polymers, for example, polyvinyl alcohol, polyethylene oxide, sodium polyacrylate can be used, and as emulsion resins, polyvinyl acetate emulsion, ethylene-vinyl acetate copolymer emulsion, acrylic emulsion, styrene-acrylic emulsion, vinyl chloride emulsion, etc. can be used. lotion. As the ink, for example, ink that is easy to peel off when characters are written on a board with a scriber and rubbed after drying. The breakable layer 40 can be made using various printing methods. In this embodiment, the breakable layer 40 is also formed of a transparent substance that is transparent under natural light or has a color that is difficult to distinguish from the color if the reflective layer is colored.

The retroreflective layer of the background information 50 is transparent, and is formed by having patterns or characters on any surface of the base material layer 10 . Under natural light, the structure of the background information 50 can be seen, so a pattern that makes it difficult to see the easily destructible layer 40 can be used, or a mark or trademark with a certification function can be used. When strong light is irradiated on the retroreflective label sheet 1, the entire surface of the transparent retroreflective layer 20 is reflected by the retroreflective function, and the background information 50 cannot be seen at this time. Therefore, if a part of the reflective layer 23 of the retroreflective layer 20 is removed in such a way that there is a small pattern without glass beads, the background information 50 can be seen in the part that is missed from the entire surface reflection, and can be used as a hidden advertisement. , other marks.

According to the above configuration, the breakable layer 40 will not be broken unless a force that is not normally applied is applied to the breakable layer formed of ink that is breakable to frictional force. The retroreflective label sheet is peeled off so that the release backing paper does not bend, and the retroreflective label sheet is attached to the article so as not to strongly rub the destructible layer. When intending to perform fraudulent acts of replacing the article with the retroreflective label sheet attached, the retroreflective label sheet will be peeled off from the genuine article and re-attached to the counterfeit article. When peeled off, the fragile layer will be damaged. peel off. Therefore, by observing the state of the breakable layer, it is possible to confirm whether it is unopened or opened, thereby enabling detection of forgery or counterfeiting.

The retroreflective label sheet 1 of the above-mentioned first embodiment can see the background information 50 through the fragile layer 40, the retroreflective layer 20 and the base layer 10 under natural light, but the reflective layer 23 can also be made opaque. Construct, in this case, no background information 50 is set. In addition, although the breakable layer 40 is formed with transparent ink, the breakable layer 40 may be formed with opaque ink. In this case, it is preferable to color the reflective layer 23 and form the breakable layer 40 from a transparent ink having a color that is difficult to distinguish from the color.

2nd embodiment

As shown in FIG. 2, the retroreflective label sheet 1A of the second embodiment includes: a base layer 10; a retroreflective layer 20A, which is laminated on one side of the base layer 10, is transparent, and When incident in a specified direction, the detection light can be retroreflected in the same direction; the adhesive layer 30 is laminated on the other side of the base material layer 10 and bonded to the article; the easily destructible layer 40 is arranged on the retroreflective a part on the surface of the layer 20A; and the background information 50 formed of a pattern or characters on the surface of the base material layer 10 on the side of the adhesive layer 30 .

The retroreflective layer 20 includes a photorefractor layer 21 covered with glass beads, a holding layer 22 for maintaining the photorefractor layer 21 in a state where its surface is exposed, and a layer laminated on the surface of the photorefractor layer 21. The reflective layer 23A is laminated on the surface on the side opposite to the holding layer 22 or inside the holding layer 22 . The destructible layer 40 is formed of an ink that is destructible against friction, and is formed of a transparent ink that is transparent under natural light or has a color that is difficult to distinguish from the color when the reflective layer is colored.

This retroreflective label sheet 1A is different from the first embodiment in the reflective layer 23A. The reflective layer 23A is disposed at the focal point of the glass bead 21 , and the focal point is determined according to the refractive index of the glass bead 21 . In the present embodiment, the glass beads 21 have a refractive index of about 2.2, so the reflective layer 23A is buried in the holding layer 22 away from the glass beads 21 .

Since other structures are the same as those of the first embodiment, corresponding reference numerals are attached to the constituent elements, and descriptions thereof are omitted. Functions and effects are also the same as those of the first embodiment.

third embodiment

As shown in FIG. 3 , the retroreflective label sheet 1B of the third embodiment includes: a substrate layer 10; a retroreflective layer 20, which is laminated on one side of the substrate layer 10, is transparent, and The detection light can be retroreflected in the same direction when it is incident in a predetermined direction; the adhesive layer 30 is laminated on the other surface of the base material layer 10 and adhered to the article; the peeling damage layer 60 is formed on the base material between layer 10 and adhesive layer 30; easily breakable layer 40, which is disposed on a portion of the surface of retroreflective layer 20; and background information 50, which is patterned on the surface of substrate layer 10 on the adhesive layer 30 side Or text etc. form. The retroreflective layer 20 has the same structure as that of the first embodiment, and includes a photorefractor layer 21 covered with glass beads, a holding layer 22 that keeps the photorefractor layer 21 in a state where its surface is exposed, and The reflective layer 23 is laminated on the surface of the light refractor layer 21 opposite to the surface portion or laminated inside the holding layer 22 .

This retroreflective label sheet 1B is different from the first embodiment in that it has a peeling damage layer 60 . The peel failure layer 60 is formed by laminating a plurality of thin-layer films with weak adhesive force, and is a layer that tends to delaminate at the interface when a shear force is applied from the lateral direction to cause dissociation between the layers. Here, the dissociated part between the layer films exists in the part other than the peripheral edge of the label sheet.

Since other structures are the same as those of the first embodiment, corresponding reference numerals are attached to the constituent elements, and descriptions thereof are omitted. Functions and effects are also the same as those of the first embodiment.

The peeling failure layer 60 is a layer that is peeled off and remains on at least a part of the article (not shown) when the retroreflective label sheet 1B is peeled from the state adhered to the article (not shown).

According to this structure, it can be understood that the retroreflective label sheet cannot be restored when the retroreflective label sheet is peeled off when the fraudulent act of replacing the article to which the retroreflective label sheet is attached is attempted. In the case of re-pasting, not only the destructible layer 40 will be destroyed and fall off, but also the surface of the retroreflective label sheet 1B is not smooth and presents unevenness that can be clearly recognized. Therefore, by observing the destructible layer 40 and peeling damage The state of the layer 60 can be confirmed whether it is unopened or opened, and thus whether forgery or counterfeiting has been performed can be detected.

4th embodiment

As shown in FIG. 4 , the retroreflective label sheet 1C of the fourth embodiment includes: a base layer 10; a retroreflective layer 20A, which is laminated on one side of the base layer 10, is transparent, and The detection light can be retroreflected in the same direction when it is incident in a predetermined direction; the adhesive layer 30 is laminated on the other surface of the base material layer 10 and adhered to the article; the peeling damage layer 60 is formed on the base material between layer 10 and adhesive layer 30; easily breakable layer 40, which is disposed on a portion of the surface of retroreflective layer 20A; and background information 50, which is patterned on the surface of substrate layer 10 on the adhesive layer 30 side Or text etc. form.

The retroreflective layer 20 has the same structure as that of the second embodiment, and includes a photorefractor layer 21 covered with glass beads, a holding layer 22 that keeps the photorefractor layer 21 in a state where its surface is exposed, and Reflective layer 23A is laminated on the surface portion of base material layer 10 .

This retroreflective label sheet 1C differs from the second embodiment in that it has a peel-off layer 60 . Since other structures are the same as those of the second embodiment, corresponding reference numerals are attached to the constituent elements, and descriptions thereof are omitted. Functions and effects are also the same as those of the third embodiment.

Fifth to Eighth Embodiments

5 to 8 show fifth to eighth embodiments. The retroreflective body label sheet 1D of the fifth embodiment shown in FIG. 5 is different from the first embodiment in the photoreflector layer 21D of the retroreflective layer 20D. The retroreflective body label sheet 1E of the sixth embodiment shown in FIG. 6 is different from the second embodiment in the photoreflector layer 21E of the retroreflective layer 20E. The retroreflective body label sheet 1F of the seventh embodiment shown in FIG. 7 is different from the third embodiment in the photorefractive layer 21F of the retroreflective layer 20F. The retroreflective body label sheet 1G of the eighth embodiment shown in FIG. 8 is different from the fourth embodiment in the photoreflector layer 21G of the retroreflective layer 20G.

These light refractor layers 21D to 21G are not glass beads, but optical moldings in which convex spherical surfaces are arranged on both sides, and substantially the same function as a retroreflective layer in which glass beads are arranged in an array can be obtained. Since other structures are the same as those in the corresponding embodiments, the same reference numerals are used to omit descriptions thereof.

ninth embodiment

Fig. 9 is a plan view of a retroreflective label sheet according to a ninth embodiment in which the retroreflective label sheets 1, 1A to 1G according to the above-mentioned first to eighth embodiments are arranged around the surface of the retroreflective layer. A print protection layer 70 is provided. FIG. 10 shows a situation where the fragile layer 40 of the retroreflective label sheet 1 according to the first embodiment shown in FIG. 1 is formed to the periphery of the label sheet. on the breakable layer 40 . FIG. 11 shows a situation in which the fragile layer 40 of the retroreflective label sheet 1 according to the first embodiment shown in FIG. 1 is formed away from the periphery of the label sheet. In this retroreflective label sheet 1, the print protection layer 70 is overlapped. on the retroreflective layer 20 . The print protection layer 70 can also be provided similarly to the retroreflective body label sheets 1 and 1A to 1G of the first to eighth embodiments.

The print protection layer 70 helps to prevent the easily destructible layer 40 from being damaged by a force or the like that is applied when the sheets including the arrayed retroreflective label sheets are stacked on the release liner or the like. By forming the print protection layer 70 , it is possible to prevent a legitimate operator from accidentally touching the breakable layer 40 during operation, and thus it is possible to improve the accuracy of detection of forgery and counterfeiting.

Preferably, the printing protection layer 70 is printing ink or thermoplastic resin. As for thermoplastic resins, there are, for example, polystyrene resins, polyester resins, acrylic resins, silicone resins, fluororesins, polyamide resins, polyvinyl alcohol resins, polyurethane resins, polyolefin resins, polycarbonate resins , polysulfone resin, etc. By providing the printing protection layer 70, the thickness of the fragile layer 40 is increased to make it difficult to break. Preferably, the combined thickness of the print protection layer 70 and the breakable layer 40 is 5 μm or more.

Example 1

FDKARTON ACE MAT OP NISU (FD カルトン ACE マツト OP NISU) made by Toyo Ink (东洋インキ) is used on the surface (exposed surface of the glass beads) of the retroreflector whose color tone is red when the reflective layer reflects light. The composed transparent ink is used to form the easily destructible layer of the light-transmitting text "Sample" by letterpress printing. The destructible layer was made into two types with a thickness of 3 μm and 5 μm.

A retroreflector layer having a destructible layer with different layer thicknesses was punched out into a circle with a diameter of 1 cm, and this was pasted on the box as a retroreflector label sheet. The characters "Sample" of this retroreflective label sheet were difficult to see under natural light, but when strong light was irradiated, the characters "Sample" emerged and became visible. Next, the sheet was peeled off from the box, pasted on the box again, and the sheet was observed by irradiating strong light. In the case of a sheet having a destructible layer with a thickness of 3 μm, the characters of "Sample" were cut off, and in the area where the characters were cut off, the characters of "Sample" emerged in a state of being almost unreadable and could be read. arrive. On the other hand, in the case of a sheet having a destructible layer with a thickness of 5 μm, the characters of “Sample” clearly emerged and could be seen. In addition, this observation was repeated 20 times, and all the results were the same.

Example 2

On the glass beads of the retroreflector (the hue seen when the reflective layer reflects light is red), use a colored transparent ink (FD KARTON ACE MAT OP NISU+Sakura made by Toyo Ink) that is different from the hue seen when the reflective layer reflects light MICROLITH BLUE (3% of the total weight) manufactured by Miya Chemical Co., Ltd. (Sakura Miya Chemical Co., Ltd.) has the letter "Sample" printed on it.

The obtained retroreflector with the colored destructible layer was punched out into a circle with a diameter of 1 cm, which was pasted on the box as a retroreflector label sheet.

In the same manner as in Example 1, a peeling test of the paper sheet was performed. The "Sample" text was chipped off to the extent that it can be seen slightly under natural light, but when the strong light is applied, the color of the reflective layer is strengthened, and the "Sample" text can be clearly confirmed to be destroyed. In addition, this observation was repeated 20 times, and all the results were the same.

Example 3

On the surface (the exposed surface of the glass bead) of the retroreflector (the hue seen when the reflective layer reflects light becomes iridescent depending on the viewing angle, the so-called structural color), a warm-colored colored transparent ink is used and printed by letterpress. A destructible layer with the word "Sample" formed at a thickness of 3 μm.

The retroreflector with the destructible layer was punched into a circle with a diameter of 1 cm, and it was pasted on the box as a retroreflector label sheet. The characters "Sample" on this retroreflector are slightly recognizable under natural light. When irradiated with strong light, if you see warm colors in the structural color of the reflective layer of the retroreflector, the text "Sample" cannot be confirmed. Text "Sample" can be confirmed. Next, a peeling test of the paper sheet was carried out. When the sheet was observed under strong light, in the region where the "Sample" character was cut off, the structural color of the reflective layer was seen in a tone other than the warm color system, and the character was regarded as being suppressed. The state of destruction emerges and can be seen. In addition, this observation was repeated 20 times, and all the results were the same.

Example 4

On the glass beads of the retroreflector of Example 3, use warm-colored colored transparent ink (FD KARTON ACE MAT OP NISU manufactured by Toyo Ink + MICROLITH RED manufactured by Sakuramiya Chemical (3% of the total weight)) to measure the thickness A star mark was printed at 3 μm, and the letter “Sample” was printed with a thickness of 3 μm by the transparent ink employed in Example 1.

The obtained retroreflector with two types of printing was punched out into a circle with a diameter of 1 cm, and this was pasted on the box as a retroreflector label sheet. This retroreflective label sheet only shows the star mark in natural light. Next, a peel test of the sheet was performed.

When the thin section was observed under strong light, the structural color was enhanced, and in the area where the "Sample" characters were cut off, the "Sample" characters emerged in a destroyed state that was almost unreadable and could be seen. In addition, when the structural color of the reflective layer is seen in a color tone other than the warm color system, the star mark appears in a broken state and can be seen. In addition, this observation was repeated 20 times, and all the results were the same.

Next, the manufacturing method of the retroreflective label sheet of this invention is briefly demonstrated. Here, a case of a retroreflective label sheet having a fragile layer on glass beads will be described.

The manufacturing process of a retroreflective label sheet generally includes a fixing process of glass beads, a forming process of a reflective layer, a bonding process of a base material layer, and a film peeling process. Next, a specific manufacturing method will be described.

(1) Manufacture of retroreflective label sheet with single-layer reflective layer

Polyethylene resin is coated on the upper surface of a film such as a PET film, glass beads are scattered in an array and dried. Thus, the lower hemisphere of the glass bead was buried in the polyethylene resin (glass bead fixing step). Next, a thin film of a metal compound is vapor-deposited in a range of 100 to 600 nm on the exposed upper surface of the glass beads (step of forming a reflective layer). Then, a polyethylene resin is applied to the substrate layer laminated on the release sheet via an adhesive layer, and this is used as a holding layer, and the substrate layer and the holding layer are pasted on the above-mentioned reflective layer (substrate layer bonding step) , and finally, films such as PET film and polyethylene resin are peeled off (film peeling process).

Due to the presence of irregularities on the surface of the glass beads, the film thickness of the metal compound fluctuates and has layers.

(2) The reflective layer is a multi-layer retroreflective label sheet

Polyethylene resin is coated on the upper surface of a film such as a PET film, and glass beads are scattered and dried to bury the lower hemisphere of the glass beads in the polyethylene resin (glass bead fixing step). Next, a plurality of metal compound thin films (in the range of 100 to 200 nm) are vapor-deposited on the exposed upper surfaces of the glass beads to form a multilayer reflective layer (step of forming a reflective layer). Then, a polyethylene resin is applied to the substrate layer laminated on the release sheet via an adhesive layer, and this is used as a holding layer, and the substrate layer and the holding layer are pasted on the above-mentioned reflective layer (substrate layer bonding step) , and finally, films such as PET film and polyethylene resin are peeled off (film peeling process).

When the obtained retroreflective label sheet with a destructible layer on the glass beads is made into a specific shape, such as a circular label sheet, only the circular label sheet 1 is arranged on the release sheet 80. flakes (see Figure 12). The retroreflective label sheet 1 in which only the label sheet remains on the peeling sheet 80 can be obtained by giving the glass beads 21 a label sheet-shaped notch 91 and peeling off only the remaining portion 93 of the circular label sheet.

However, when the remaining label sheet portion 93 is peeled off (removal of scraps), the remaining label sheet portion 93 may be peeled off together with the label sheet 1 (hereinafter referred to as “simultaneously lifted”). In order to prevent simultaneous lifting, as shown in FIG. 12 , a notch 91 is provided on the side of the label sheet 1 across the remaining part 93 of the label sheet. The cutouts 91 are arranged diagonally to each other at the peripheral edge of the label sheet 1 . The cut 91 is a half cut applied to the retroreflective layer 20 from the surface of the retroreflective label sheet.

By providing the slit 91 straddling the retroreflective label sheet 1 and the remaining portion 93 of the label sheet, the drying of the solvent contained in the adhesive is promoted by the slit, and when the remaining portion 93 of the label sheet is peeled off from the release backing paper 80, the remaining portion 93 of the label sheet is applied. Since the force applied to the retroreflective label sheet 1 is dispersed and the retroreflective label sheet 1 is firmly adhered to the release liner 80 , simultaneous lifting can be prevented. In addition, the notches 91 are easy to tear against the reattachment of the retroreflective label sheet 1 , and do not have recovery properties for the reattachment, so they have an effect of unsealing confirmation.

As for the knife for punching the retroreflective label sheet 1 by applying the slit 91 and the label punching slit 92 , for example, a Thomson knife, a rotary knife, or the like can be used.

Next, an article to which any one of the above-mentioned first to ninth retroreflective label sheets is fixed will be described.

An anti-counterfeit article or a container article accommodating the anti-counterfeit article can be mentioned as the article on which the retroreflective label sheet is fixedly pasted. For example, in a game machine such as a pinball machine or a slot machine, the probability of hitting a ball is written in a PROM or the like, and the PROM or the like is accommodated in a case and cannot be easily touched. In order to prevent fraudulent actions such as changing the PROM to increase the probability of hitting the ball, a retro-reflective label sheet is provided on the PROM itself or the box containing the PROM, so that it can be judged whether it is necessary to check for counterfeiting or counterfeiting.

When the retroreflective label sheet is attached to the PROM itself, it is necessary to replace it with an unauthorized PROM or the like, and to reattach the retroreflective label sheet. In addition, when the retroreflective label sheet is pasted so as to cover the mating surface of the box body containing the PROM, etc., and the cover, it is necessary to peel off the retroreflective label sheet, open the cover and replace it with the illegal PROM, etc. Attach the retroreflective label sheet so as to cover the mating surface of the box main body and the cover.

Once the retroreflective label sheet of the present invention is reattached, the destructible layer will be destroyed. In addition, if there is a peeling damaged layer, the peeling damaged layer will also be peeled and damaged, so it can be immediately recognized that re-pasting has been performed. Therefore, it is possible to confirm whether the package is unopened or opened, or whether the article has been replaced.

Items to which a retroreflective label sheet is attached include a control board housed in a board case of a game machine control board unit, a board case, electronic components such as a PROM, and a seal for a certificate attached to the case.

FIG. 14 shows a case where a seal 102 is provided for a certificate 101 attached to a case 100 accommodating a control component that is a subject of fraudulent replacement. As for the seal 102, a retroreflective label sheet 102 is employed. In addition, as shown in this example, the background information 50 of the retroreflective label sheet 102 may be used as certification information, and a common sealing material may be used for the seal 102 .

FIG. 15 shows a case where a retroreflective label sheet 106 is pasted as a seal so as to cover the mating surface of the case main body 104 that accommodates control components that are subject to unauthorized replacement.

16 shows the following situation: the first retroreflective body label sheet 110 is pasted on the control substrate 109 having CPU 107, ROM 108, etc. as the object of illegal replacement, the control substrate 109 is placed on the lower case 111, and the side surface is covered with The upper case 113 of the second retroreflective label sheet 112, and the lower case 111 and the upper case 113 are connected by bolts. In this example, the second retroreflective label sheet 112 is located between the side surface of the lower case 111 and the side surface of the upper case 113 in the assembled state. In addition, in this example, the first retroreflective body label sheet 110 may be attached to the CPU 107 .

Industrial Applicability

Since the retroreflective label sheet with a destructible layer of the present invention is used as an anti-tampering seal of a substrate housing case of a game machine, as long as it is unsealed improperly, traces will be left. Effective use of preventive measures.

Explanation of reference signs

1. 1A～1G retroreflector label sheet; 10 substrate layer; 20. 20A～20G retroreflective layer; 21 glass beads; 21D～21G photorefractor layer; 22 holding layer; 23, 23A reflective layer; layer; 40 fragile layer; 50 background information; 60 peeling damage layer; 70 printing protection layer; 80 peeling backing paper; 91 incision; 92 label punching incision;

Claims (11)

1. A retroreflective label sheet, comprising: substrate layer; A retroreflective layer, which is laminated on one surface of the above-mentioned substrate layer, and can make the detection light retroreflect in the same direction when the detection light is incident from a predetermined direction; an adhesive layer laminated on the other side of the aforementioned substrate layer and bonded to the article; and a breakable layer disposed on at least a portion of the surface of the retroreflective layer; The above-mentioned retroreflective layer includes: a photorefractor layer; a holding layer, which maintains the above-mentioned photorefractor layer in a state where the surface part of the photorefractor layer is exposed; and a reflective layer, which is laminated on the surface part of the above-mentioned photorefractor layer. The face on the opposite side or the interior of the above-mentioned retaining layer; The destructible layer is formed of a substance destructible against frictional force. 2. The retroreflective label sheet of claim 1, wherein: The breakable layer is formed of a transparent substance that is transparent under natural light or has a color that is difficult to distinguish from the color when the reflective layer is colored. 3. The retroreflective label sheet of claim 1, wherein: Between the base material layer and the adhesive layer, there is a peeling failure layer which is peeled from a state adhered to the article and remains on at least a part of the article due to peeling failure. 4. The retroreflective label sheet of any one of claims 1 to 3, wherein: The reflective layer produces structural color through the interference of light. 5. The retroreflective label sheet of any one of claims 1 to 3, wherein: A cutout is provided on the side of the retroreflection layer. 6. The retroreflective label sheet of any one of claims 1 to 3, wherein: The photorefractor layer is composed of a plurality of glass beads, and the plurality of glass beads are held in a state of being partially embedded in the surface of a holding layer, and the holding layer is laminated on the base material layer and is composed of a thermoplastic resin. . 7. The retroreflective label sheet of any one of claims 1 to 3, wherein: The above-mentioned retroreflective layer is transparent, and background information is formed on any one surface of the above-mentioned base material layer, and the background information has patterns or characters. 8. The retroreflective label sheet of any one of claims 1 to 3, wherein: The above-mentioned retroreflective label sheet is an anti-counterfeiting seal. 9. An article fixedly pasted with the retroreflective label sheet according to any one of claims 1 to 8. 10. The article of claim 9, wherein, The above-mentioned article is an anti-counterfeiting article or a container article containing the anti-counterfeiting article, and the above-mentioned retroreflective label sheet is fixedly pasted. 11. The article of claim 9, wherein, The above-mentioned article is an article formed by combining a plurality of members, and the above-mentioned retroreflective label sheet is fixedly pasted on the plurality of members in such a manner as to cover a closed seam.

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