JP6414841B2 - Anti-tamper labels and methods for determining whether tamper-proof labels are reused - Google Patents

Description

  The present invention relates to a tamper-proof label and a determination method for determining whether or not to reuse the tamper-proof label.

  A sealing body provided with the contents stored and sealed may have a tamper-proof label attached to the sealing opening so that the fact of opening can be easily recognized when it is opened. This is to prevent the stored contents of the sealing body from being tampered with or misused at an unintended timing or opened and taken out by an unintended person. Further, in order to guarantee that the product is a genuine product, a tamper-proof label may be attached to the product. When the tamper-proof label is removed from the adhered adherend (the above-mentioned sealing body, product, etc.), the base material of the tamper-proof label is easily destroyed, or a part of the tamper-proof label component is covered. It can be easily confirmed that it has been removed by, for example, forming characters such as “VOID” and “opening” left on the body (see, for example, Patent Document 1).

JP-A-10-116031

  However, even if a tamper-proof label, for example, leaves characters on the adherend, it can be reused by applying an adhesive to the affixing surface after removal, unless it is observed carefully. There was a problem that it was difficult to notice the fact of use. In addition, even if it is a tamper-proof label that easily breaks the base material when it is removed, it can be applied to both the tamper-proof label and the adherend by carefully handling it with a paste remover or heating. It is possible to peel off (remove) without leaving a trace of destruction or damage. Therefore, the tamper-proof label removed in an intact state may be reused as it is, or may be reused by re-applying the adhesive on its application surface.In that case, unless carefully observed, There was a problem that it was difficult to notice the fact of reuse. In this way, the conventional tamper-proof label can be misused by reuse, for example, by replacing the contents of the sealed body and attaching it again or attaching it to a counterfeit product. It is difficult to do.

  As a tamper-proof label that makes reuse and counterfeiting difficult, a label having a complicated configuration using an easily destructible hologram, RFID (radio frequency identifier), or the like has been proposed. However, since these labels are expensive, it is not practical to use them for general-purpose products distributed in large quantities such as foods.

  The present invention has been made in view of the above circumstances, a novel tamper-proof label that can easily determine the presence or absence of reuse with a simple configuration, and a determination method for determining whether or not the tamper-proof label is reused It is an issue to provide.

In order to solve the above-mentioned problems, the present invention uses tampering that can be used by sticking to an adherend, removing the attached adherend, and then sticking to the adherend again to determine whether or not to reuse. An anti-adhesive label, wherein a pressure-sensitive adhesive layer and a base material are laminated, a code pattern is provided on the surface of the base material opposite to the pressure-sensitive adhesive layer side, and a second pressure-sensitive adhesive is further provided on the code pattern. A layer and a covering layer are laminated in this order, and the base material is not separated into a plurality of layers in the thickness direction, and the code pattern is divided into two or more regions when looking down from above. The adhesive layer and the base material, or the adhesive layer, the base material, and the cord pattern are provided with continuous cuts, and when the tamper-proof label is removed from the adhered adherend, the cuts are divided by the cuts. Said adhesive , Part of the area of the substrate and the code patterns, the provide tamper-proof labels, characterized in that it is to remain on the adherend.
Further, the present invention is a method for applying the tamper-proof label to an adherend via the pressure-sensitive adhesive layer, and initial information obtained from a code pattern of the tamper-proof label before or after application to the adherend. After obtaining the initial information, the latest information acquired from the code pattern on the adherend is compared. If the latest information is the same as the initial information, the tamper-proof label is not reused. And when the latest information is different from the initial information because the partial area of the code pattern divided by the cut is missing, the tamper-proof label is reused. A method for determining whether or not a tamper-proof label is reused is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the novel tamper-proof label which can determine the presence or absence of reuse with a simple structure easily, and the determination method which determines the presence or absence of the reuse of the said tamper-proof label are provided.

It is a figure which illustrates typically a 1st embodiment of a tamper-proof label concerning the present invention, (a) is a top view and (b) is a sectional view in an II line of (a). It is a top view for demonstrating typically the effect | action at the time of use of the tamper-proof label shown in FIG. It is sectional drawing in the II line | wire of FIG. 2 for demonstrating the effect | action at the time of use of the tamper-proof label shown in FIG. It is sectional drawing which illustrates typically 2nd Embodiment of the tamperproof label which concerns on this invention. It is a top view which illustrates typically a 3rd embodiment of a tamper-proof label concerning the present invention. It is a top view for demonstrating typically the effect | action at the time of use of the tamper-proof label shown in FIG. It is a top view which illustrates typically 9th Embodiment of the tamper-proof label which concerns on this invention. It is a top view for demonstrating typically the effect | action at the time of use of the tamper-proof label shown in FIG. It is sectional drawing for demonstrating typically the manufacturing method of the tamper-proof label shown in FIG. It is sectional drawing for demonstrating typically the manufacturing method of the tamper-proof label shown in FIG.

<Tamper-proof label>
The tamper-proof label according to the present invention is used by sticking to an adherend, and after removing from the pasted adherend, it can be used again by sticking to the adherend and determining whether or not to reuse. The pressure-sensitive adhesive layer and the base material are laminated, and a code pattern is provided on the surface of the base material on the side opposite to the pressure-sensitive adhesive layer side. The adhesive layer and the base material, or the adhesive layer, the base material and the code pattern are continuous so as to divide the code pattern into two or more regions when not looking down from above. When the tamper-proof label is removed from the attached adherend, the adhesive layer, the base material, and a partial region of the code pattern divided by the cut are provided on the adherend. To stay on top And said that you are.
The tamper-proof label uses a conventional two-dimensional code, and can be easily determined whether or not it is reused with a simple configuration in which an adhesive layer, a base material, etc. are simply processed. Is. The conventional two-dimensional code (code pattern) reflects manufacturing management information and product management information, whereas the tamper-proof label uses the two-dimensional code as a means for preventing tampering. This is completely different from the tamper-proof label.

(First embodiment)
1A and 1B are diagrams schematically illustrating a first embodiment of a tamper-proof label according to the present invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line II in FIG. .
The tamper-proof label 1 shown here has a pressure-sensitive adhesive layer 12 and a base material 13 laminated, and a code pattern 14 is provided on the surface 13a of the base material 13 opposite to the pressure-sensitive adhesive layer 12 side. A release material 11 is provided on the surface (back surface) 12b of the pressure-sensitive adhesive layer 12 opposite to the base material 13 side. That is, the tamper-proof label 1 is formed by laminating a release material 11, an adhesive layer 12, a base material 13, and a code pattern 14 in this order. In the present specification, the code pattern means not a pattern (shape) of each code but a pattern indicated by the code as a whole.

The code pattern 14 is a color code pattern colored with a color other than white and black, and the first code 141, the second code 142, the third code 143, and the fourth code 144 (hereinafter collectively referred to as different colors). “Sometimes abbreviated as“ first code 141 to fourth code 144 ”)”. That is, the code pattern 14 is composed of four colors.
The colors of the first code 141 to the fourth code 144 are not particularly limited as long as they are other than white and black, and are not particularly limited as long as they are colors that can be recognized as different from each other, such as red, blue, yellow, green, and purple. .

  The code pattern 14 may be composed of two to three colors or five or more colors in addition to the four colors. One or both of white and black may be included in the code pattern 14.

  Here, each of the first cord 141 to the fourth cord 144 has a quadrangular shape when viewed from above (a shape in plan view), and the outer edges thereof are arranged in contact with each other. In accordance with the shape of these codes, the code pattern 14 also has a quadrangular outer shape (shape in plan view) when viewed from above, and has a grid shape.

  The shape of each cord may be, for example, a polygonal shape other than a quadrangle such as a triangle, pentagon, or hexagon, or may be a shape other than a polygonal shape. Also, the shape and size of each cord may all be the same, all may be different, or only a part may be the same. The shape of the code pattern 14 may also be an outer shape other than a quadrangle shape or a non-square shape according to the shape of each code.

  Here, the code pattern 14 includes 16 codes, but the number of codes constituting the code pattern 14 is not limited to this. However, the number of codes constituting the code pattern 14 is preferably 8 to 50.

  Further, the tamper-proof label 1 is provided with a cut 10. The notch 10 is continuous with the adhesive layer 12, the base material 13, and the code pattern 14 so as to divide the code pattern 14 into two regions when the anti-tampering label 1 is looked down from above (in plan view). Is provided. In more detail, it is as follows.

  As shown in FIG. 1B, the cuts 10 are continuously provided in a continuous manner from the pressure-sensitive adhesive layer 12 to the base material 13 and from the base material 13 to the code pattern 14. The cuts 10 are provided so as to penetrate in the thickness direction in any of the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14, and from the back surface 12 b of the pressure-sensitive adhesive layer 12, It is continuously provided over the surface 14a opposite to the base material 13 side. Here, in order to make it easy to distinguish from the other, the notch 10 is indicated by a dotted line, but the actual notch 10 does not necessarily have to be intermittently provided in this way (continuous). As will be described later, when an appropriate external force is applied (that is, when the tamper-proof label 1 is removed from the adherend), the adhesive layer 12 and the base material 13 are used as a boundary. And the code pattern 14 should just be formed so that it may isolate | separate, respectively.

  Further, the notch 10 does not necessarily have to be provided in the thickness direction in any of the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14, and the tamper-proof label 1 is attached to the adherend. It is only necessary to form the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14 so as to separate from each other at the time of removal from the printer. However, in this embodiment, in any of the pressure-sensitive adhesive layer 12, the base material 13, and the cord pattern 14, the lengths of the cuts 10 in the thickness direction are those (the pressure-sensitive adhesive layer 12, the base material 13, the cord It is preferably 90% or more of the thickness of the pattern 14), more preferably 95% or more, and particularly preferably 100%. When the ratio of the length of the notch 10 is equal to or more than the lower limit value, when removing the tamper-proof label 1 from the adherend, the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14 (partition region 18 described later). Is more easily separated.

  Further, the cut 10 may be provided in the release material 11 continuously from the pressure-sensitive adhesive layer 12. In this case, the cut 10 is provided without penetrating in the thickness direction of the release material 11. As described above, when the cut 10 having a predetermined length is formed in the pressure-sensitive adhesive layer 12, the cut 10 may also be formed in the release material 11 in the method for manufacturing the tamper-proof label 1 described later. And even if the cut | notch 10 is formed in the peeling material 11 in this way, this invention does not prevent that there exists the effect.

  On the other hand, as shown in FIG. 1A, the notch 10 is provided on one outer edge 141c of the four first cords 141 or in the vicinity thereof along the outer edge 141c. However, here, in order to easily distinguish the notch 10 from the outer edge 141 c of the first cord 141, the notch 10 is shown separated from the outer edge 141 c of the first cord 141.

  In this way, the notch 10 is provided so as to coincide with the first code 141 or surround the first code 141, so that the first notch is formed on the surface 14 a of the code pattern 14. The code pattern 14 is divided into two areas, one code 141 and 15 other codes. Further, the cuts 10 are continuously provided from the back surface 12 b of the pressure-sensitive adhesive layer 12 to the surface 14 a of the code pattern 14 in the cross section of the tamper-proof label 1. Therefore, the tamper-proof label 1 can be completely divided into two by the notch 10 in a state where the release material 11 is peeled off.

  The notch 10 only needs to be able to divide the adjacent cords (for example, the first cord 141 and the second cord 142) from this boundary, and as shown here, a gap (slit) is formed between the adjacent cords. (In other words, adjacent cords may be in contact with each other), or may be provided with a gap formed between adjacent cords (in other words, adjacent cords) Need not be in contact with each other). When the gap is provided, the width (slit width) is preferably 5 mm or less.

In the code pattern 14, the color combination of the first code 141 to the fourth code 144 is not particularly limited.
And the 1st code | cord | chord 141-the 4th code | cord 144 contain colorants, such as a pigment corresponding to the color, or are comprised without containing a colorant. The colorant contained in the first code 141 to the fourth code 144 may be a known colorant and is not particularly limited.

The area of the surface 14a of the code pattern 14 (in FIG. 1, the total area of the surfaces of the first code 141 to the fourth code 144) is preferably 0.4 to 10 cm ² , and is 1 to 8 cm ² . More preferably. When the area of the surface 14a of the code pattern 14 is equal to or larger than the lower limit value, it is easier to read the code pattern 14 with a reader. Further, since the area of the surface 14a of the code pattern 14 is equal to or less than the upper limit value, the code pattern 14 is suppressed from being excessively large.

The first code 141 to fourth code 144, the area of each surface is preferably 1 to 25 mm ^2, more preferably 2 to 10 mm ^2. When the area of the surface of each code is equal to or greater than the lower limit value, the code pattern 14 can be easily read by a reader. Moreover, it is suppressed that the code pattern 14 becomes an excessive magnitude | size because the area of the surface of each code | cord | chord is below the said upper limit.

  The thickness of the first cord 141 to the fourth cord 144 (thickness of the code pattern 14) is not particularly limited, but is preferably 0.5 to 50 μm, and more preferably 1 to 30 μm. When the thickness of these cords is equal to or greater than the lower limit value, the structure of the cord is more stably maintained, and when the thickness of these cords is equal to or less than the upper limit value, the tamper-proof label 1 is made thinner. it can. Here, the case where the thicknesses of the four types of cords of the first cord 141 to the fourth cord 144 are all the same is shown, but in the present invention, the thickness of the four types of cords is the type of the cord. Each may be different, or only a part may be the same. The thicknesses of the 16 cords constituting the code pattern 14 may all be the same, all may be different, or only a part may be the same.

The base material 13 is not separated into a plurality of layers in the thickness direction. In this specification, “the base material does not separate into a plurality of layers in the thickness direction” means that the base material 13 is subjected to normal handling conditions including removal (peeling) of the tamper-proof label from the adherend. Does not separate into two or more layers in the thickness direction.
When the base material 13 is separated into a plurality of layers in the thickness direction, the upper layer portion provided with the code pattern 14 generated by the separation is opposite to the separation surface (the side provided with the code pattern 14). By providing a pressure-sensitive adhesive layer or the like on the side surface), it is possible to affix it to the adherend without damaging the code pattern 14, and it can be reused. However, since the base material 13 is not separated into a plurality of layers in the thickness direction, the tamper-proof label 1 is prevented from being reused.

Although the material of the base material 13 will not be specifically limited if the said conditions are satisfy | filled, The thing containing resin is preferable and only resin may be sufficient.
Examples of the resin include polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN); polyethylene (PE), polypropylene Examples thereof include polyolefins such as (PP), polystyrene (PS) and polyvinyl chloride (PVC); polyimides and the like.
The material of the base material 13 may be only one kind, or may be two or more kinds. When there are two or more kinds, the combination and ratio thereof can be arbitrarily adjusted.
As what consists of 2 or more types of materials, the alloy (polymer alloy) which consists of 2 or more types of resin, and what provided metal layers, such as aluminum, on the resin layer by vapor deposition etc. can be illustrated.
The resin may be a foam such as foamed polyethylene terephthalate.

  Although the thickness of the base material 13 is not specifically limited, It is preferable that the base material 13 is a film form or a sheet form. In that case, it is preferable that the thickness of the base material 13 is 1-125 micrometers, and 2-50 micrometers. It is more preferable that

The substrate 13 may be composed of a single layer or may be composed of two or more layers. When the base material 13 consists of multiple layers, these multiple layers may be the same as or different from each other. That is, all the layers may be the same, all the layers may be different, or only some of the layers may be different. And when several layers differ from each other, the combination of these several layers is not specifically limited. Here, the plurality of layers being different from each other means that at least one of the material and the thickness of each layer is different from each other.
In addition, when the base material 13 consists of multiple layers, it is good to make it the thickness of the total of each layer be the thickness of said preferable base material 13.

  When the base material 13 consists of two or more layers, the base material 13 should just be a thing in which each layer does not isolate | separate into multiple layers in the thickness direction, and does not carry out interlayer separation.

  Among these, the substrate 13 is particularly preferably a single layer containing a resin.

Since the base material 13 is not separated into a plurality of layers in the thickness direction, the interlayer strength is preferably 25 N / 25 mm or more, and more preferably 30 N / 25 mm or more. Here, “interlayer strength of the substrate” means that measured by the following method.
(Measurement method of interlayer strength of substrate)
A laminate of the pressure-sensitive adhesive layer 12 and the base material 13 (with the structure in which the release material 11 and the code pattern 14 are removed from the tamper-proof label 1) is attached to the adherend via the pressure-sensitive adhesive layer 12, and further the base A test pressure-sensitive adhesive layer having a thickness of 20 μm is formed on the surface of the material 13 opposite to the pressure-sensitive adhesive layer 12 using an acrylic strong pressure-sensitive adhesive (“PAT1” manufactured by Lintec Corporation), and this test pressure-sensitive adhesive layer A laminated structure in which a test substrate made of polyethylene terephthalate having a thickness of 50 μm is stuck thereon, and the adhesive layer 12, the substrate 13, the test adhesive layer, and the test substrate are laminated in this order on the adherend. Form. Next, in this laminated structure, the test base material and the test pressure-sensitive adhesive layer are peeled off, and the peeling force when the base material 13 peels in the thickness direction is defined as the interlayer strength. However, when peeling occurs between the pressure-sensitive adhesive layer 12 and the adherend or between the base material 13 and the test pressure-sensitive adhesive layer, the base material 13 is not separated into a plurality of layers in the thickness direction. Judge. The above-mentioned “delamination of the base material 13 in the thickness direction”, “peeling between the pressure-sensitive adhesive layer 12 and the adherend”, “peeling between the base material 13 and the test pressure-sensitive adhesive layer” Means that the target parts are completely separated from the integrated state.

  The pressure-sensitive adhesive layer 12 may be a known one, and examples of the pressure-sensitive adhesive that constitutes the pressure-sensitive adhesive layer 12 include acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, polyurethane-based pressure-sensitive adhesives, and polyester-based pressure-sensitive adhesives. These pressure-sensitive adhesives may be any of emulsion type, solvent type and solventless type.

  Although the thickness of the adhesive layer 12 is not specifically limited, It is preferable that it is 0.5-30 micrometers, and it is more preferable that it is 1-25 micrometers. When the thickness of the pressure-sensitive adhesive layer 12 is equal to or greater than the lower limit value, high adhesive strength can be secured when the tamper-proof label 1 is applied to the adherend, and the thickness of the pressure-sensitive adhesive layer 12 is equal to or less than the upper limit value. As a result, the tamper-proof label 1 can be made thinner.

  The adhesive strength of the pressure-sensitive adhesive layer 12 to the base material 13 suppresses the entire pressure-sensitive adhesive layer 12 from remaining on the surface of the adherend when the tamper-proof label 1 is removed (peeled off) from the adherend. In addition, as will be described later, it is only necessary that only the region divided by the notch 10 (divided region) can remain stably on the surface of the adherend.

As will be described later, the release material 11 is peeled off when applied to an adherend, but is preferably used when the tamper-proof label 1 is manufactured or stored.
The release material 11 may be a known material, and examples thereof include those in which a release layer is provided on the surface of a paper substrate or a film substrate.

Examples of the paper substrate include various paper materials such as polyethylene laminated paper, polypropylene laminated paper, clay coated paper, resin coated paper, glassine paper, and high quality paper.
Examples of the film substrate include various resin films such as polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, and polyacrylate.

  Examples of the release material 11 include a synthetic paper or film in which a filler such as a filler is contained in a paper base material or a film base material. If necessary, a release layer is provided on the surface of the synthetic paper or film. May be.

  Examples of the release layer include those containing release agents such as silicone resins, long-chain alkyl resins, and fluorine resins.

  The thickness of the release material 11 is not particularly limited and may be adjusted as appropriate.

  The tamper-proof label 1 can determine whether or not it is reused by the following operation. 2 and 3 are diagrams for schematically explaining the operation when the tamper-proof label 1 shown in FIG. 1 is used, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view taken along the line II in FIG. FIG. 2 and 3 that are the same as those shown in FIG. 1 are given the same reference numerals as those in FIG. 1, and detailed descriptions thereof are omitted. The same applies to the drawings after FIG.

  The tamper-proof label 1 is a target adherend as shown in FIGS. 2 (a) and 3 (a) by the exposed adhesive layer 12 after the release material 11 is peeled off. Affixed on the surface 9a of the body 9. This is a usage form of the normal tamper-proof label 1.

As described above, the tamper-proof label 1 is partly divided in the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14 by the cuts 10 (the first code 141 in the code pattern 14), and Since the base material 13 is not separated into a plurality of layers in the thickness direction, when the tamper-proof label 1 is removed (peeled off) from the adherend 9, as shown in FIGS. 2 (b) and 3 (b). In addition, these divided regions (divided regions) 18 remain on the surface 9 a of the adherend 9. The tamper-proof label 1 removed is shown as a defective label 1 ′ having a defective portion 19. A code pattern in which the first code 141 of the missing label 1 ′ is missing is indicated as a missing code pattern 14 ′.
If the base material 13 is to be separated into a plurality of layers in the thickness direction, what remains on the surface 9a of the adherend 9 is not the divided region 18 but the lower layer portion of the base material separated into two layers. (Not shown) and the pressure-sensitive adhesive layer 12.

  When the defective label 1 ′ is reused and pasted on the surface 8a of the adherend 8 different from the original adherend 9, as shown in FIG. 2 (c) and FIG. 3 (c), the adherend If the surface 8a of 8 is different in color (pattern) from the surface 18a of the divided region 18, the missing code pattern 14 'is a new pseudo code pattern 14 which is different from the original code pattern 14 when looking down. "The missing code pattern 14 'and the pseudo code pattern 14" are not recognized as the initial code pattern 14, and therefore the code pattern 14 is acquired as initial information. Comparing with the missing code pattern 14 ′ (pseudo code pattern 14 ″) acquired as the latest information after acquiring the initial information, the latest information is different from the initial information. Prevention label 1 can be judged to have been reused.

(Second Embodiment)
FIG. 4 is a cross-sectional view schematically illustrating a second embodiment of the tamper-proof label according to the present invention.
The tamper-proof label 2 shown here is obtained by further laminating an adhesive layer 15 and a coating layer 16 in this order on the code pattern 14 of the tamper-proof label 1 shown in FIG. In this embodiment, the pressure-sensitive adhesive layer 15 on the code pattern 14 is referred to as a second pressure-sensitive adhesive layer 15 in order to distinguish it from the pressure-sensitive adhesive layer 12 between the release material 11 and the base material 13. The pressure-sensitive adhesive layer 12 between the base materials 13 is referred to as a first pressure-sensitive adhesive layer 12.
The tamper-proof label 2 is the same as the tamper-proof label 1 except that the second pressure-sensitive adhesive layer 15 and the coating layer 16 are provided.

The covering layer 16 protects the code pattern 14 and facilitates the production of the tamper-proof label 2. A method for manufacturing the tamper-proof label 2 will be described later.
The tamper-proof label 2 may be used with the second pressure-sensitive adhesive layer 15 and the coating layer 16, or may be used with the coating layer 16 or the second pressure-sensitive adhesive layer 15 and the coating layer 16 removed. It may be appropriately selected depending on the situation. The tamper-proof label 2 when the second pressure-sensitive adhesive layer 15 and the coating layer 16 are removed is substantially equivalent to the tamper-proof label 1.

When the second pressure-sensitive adhesive layer 15 and the coating layer 16 are used as they are without being removed, the second pressure-sensitive adhesive layer 15 and the coating layer 16 need to have transparency. In this way, in the tamper-proof label 2, the coating layer 16 and the second pressure-sensitive adhesive layer are used. The code pattern 14 can be recognized via the layer 15.
When removed and used, the second pressure-sensitive adhesive layer 15 and the coating layer 16 may have transparency or may not have transparency.

The second pressure-sensitive adhesive layer 15 can have the same structure as that of the first pressure-sensitive adhesive layer 12 except for the point that it may have transparency.
However, the adhesive force of the second pressure-sensitive adhesive layer 15 to the code pattern 14 or the base material 13 is such that the second pressure-sensitive adhesive layer 15 and the code pattern 14 or the base material 13 are removed when the second pressure-sensitive adhesive layer 15 and the coating layer 16 are removed. It is preferably a value that always causes peeling at the interface with And the adhesive force with respect to the code | cord pattern 14 or the base material 13 of the 2nd adhesive layer 15 is preferably 10 N / 25mm or less, and it is more preferable that it is 7 N / 25mm or less. When the adhesive force is less than or equal to the upper limit value, the second adhesive layer 15 and the coating layer 16 are more easily removed (peeled) without impairing the laminated structure of the first adhesive layer 12 and the base material 13. be able to.
Moreover, it is preferable that the adhesive force with respect to the code pattern 14 or the base material 13 of the 2nd adhesive layer 15 is 3 N / 25mm or more. The laminated structure of the second pressure-sensitive adhesive layer 15 and the covering layer 16 is more stably maintained in the tamper-proof label 2 because the adhesive strength is equal to or more than the lower limit value.
The adhesive strength of the second pressure-sensitive adhesive layer 15 to the code pattern 14 or the base material 13 is obtained by applying the tamper-proof label 2 from which the release material 11 has been peeled off to the SUS board via the first pressure-sensitive adhesive layer 12, in a standard environment. The sample can be measured according to the measurement conditions of JIS Z 0237 except that the pasting time is set as described above after being left for 24 hours.

  Furthermore, when the 2nd adhesive layer 15 and the coating layer 16 are not removed at the time of use, it is preferable that the thickness of the 2nd adhesive layer 15 is 50 micrometers or less, and it is more preferable that it is 25 micrometers or less. When the thickness of the second pressure-sensitive adhesive layer 15 when not removed is equal to or less than the upper limit value, the recognition of the code pattern 14 through the second pressure-sensitive adhesive layer 15 and the coating layer 16 becomes easier.

  The coating layer 16 is preferably made of a resin, and examples of the resin include polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polybutylene naphthalate (PBN). Depending on whether or not it is necessary to have transparency, it may be made of a suitable material.

  Although the thickness of the coating layer 16 is not particularly limited, the coating layer 16 is preferably in the form of a film, and the thickness of the coating layer 16 is 10 to 100 μm regardless of whether or not the coating layer 16 is removed during use. It is preferable that the thickness is 15 to 50 μm. When the thickness of the coating layer 16 is equal to or more than the lower limit, the effect of providing the coating layer 16 can be obtained more remarkably. Moreover, when the thickness of the coating layer 16 is not more than the above upper limit value, the tamper-proof label 2 can be made thinner. And when not removing the 2nd adhesive layer 15 and the coating layer 16 at the time of use, it is preferable that the thickness of the coating layer 16 is 100 micrometers or less, and it is more preferable that it is 50 micrometers or less. When the thickness of the coating layer 16 when not removed is equal to or less than the upper limit, the code pattern 14 can be easily recognized through the second pressure-sensitive adhesive layer 15 and the coating layer 16.

  The coating layer 16 may be composed of a single layer, or may be composed of two or more layers. When the coating layer 16 is composed of a plurality of layers, these layers may be the same or different from each other. The thickness of is preferably the thickness of the preferred coating layer 16 described above.

  The tamper-proof label 2 exhibits the same action as the tamper-proof label 1. At this time, when the tamper-proof label 2 affixed on the surface 9 a of the adherend 9 is removed (peeled off) from the adherend 9, the dividing region 28 remains on the surface 9 a of the adherend 9. When the cover layer 16 or the second pressure-sensitive adhesive layer 15 and the cover layer 16 are used without being removed, the defective label obtained by removing the cover layer 16 or the second pressure-sensitive adhesive layer 15 and The covering layer 16 remains as it is. In FIG. 4, reference numeral 28 a indicates the surface of the divided region 28.

(Third embodiment)
FIG. 5 is a plan view schematically illustrating a third embodiment of the tamper-proof label according to the present invention.
The tamper-proof label 3 shown here is provided with a notch 30 at a position different from the notch 10 of the tamper-proof label 1 shown in FIG.
More specifically, the notch 30 surrounds one first code 141 and is divided into two first code 141 to fourth code 144 (a total of eight codes) adjacent to the first code 141. It is provided across.
The tamper-proof label 3 is the same as the tamper-proof label 1 except that a cut 30 is provided instead of the cut 10.

The falsification preventing label 3 exhibits the same action as the falsification preventing label 1. FIG. 6 is a plan view for schematically explaining the operation when the tamper-proof label 3 shown in FIG. 5 is used.
As shown in FIG. 6 (a), the tamper-proof label 3 affixed on the surface 9a of the adherend 9 that is the target adherend is removed from the adherend 9 and peeled off. A segmented region 38 remains on the surface 9 a of the body 9. As shown in FIG. 6B, the defect label 3 ′ obtained by removing has a defect portion 39 and a defect code pattern 34 ′.

  When the defective label 3 ′ is reused and pasted on the surface 8a of the adherend 8 different from the original adherend 9, the surface 8a of the adherend 8 becomes as shown in FIG. If the color (pattern) is different from the surface 38 a of the divided region 38, the missing code pattern 34 ′ is as if a new pseudo code pattern 34 ″ different from the original code pattern 14 when looking down. Since neither the missing code pattern 34 ′ nor the pseudo code pattern 34 ″ is recognized as the initial code pattern 14, the code pattern 14 is acquired as initial information, and the latest information is acquired after the initial information is acquired. If the missing code pattern 34 ′ (pseudo code pattern 34 ″) acquired as information is compared, the latest information is different from the initial information. As with, tamper proof label 3 can be determined to have been reused.

(Fourth to eighth embodiments)
Up to this point, the tamper-proof label whose code pattern is a color code pattern has been described, but the code pattern may be composed of two colors including a combination of white and black. For example, the tamper-proof label 1 can be provided with a code pattern constituted by two colors (fourth embodiment), and the tamper-proof label 2 provided with a code pattern constituted by two colors (Fifth embodiment), and the tamper-proof label 3 can be one having a code pattern composed of two colors (sixth embodiment).
Furthermore, the code pattern may be composed of only one color. For example, the tamper-proof label 1 is provided with a code pattern composed of only one color (a code pattern in which the first code 141 to the fourth code 144 are all composed of the same color) (seventh embodiment). Therefore, the tamper-proof label 2 can be provided with a code pattern composed of only one color (eighth embodiment).

(Ninth embodiment)
Further, the description has been made so far regarding the tamper-proof label in which each code of the code pattern has a quadrangular shape in plan view, but the shape of each code is not limited to this, and other shapes may be used. FIG. 7 is a plan view schematically illustrating a tamper-proof label (a ninth embodiment) provided with such a code pattern.

The tamper-proof label 4 shown here includes a code pattern 44 in which a plurality of dot-shaped same color (single color) codes 441 are arranged, and a cut 40 surrounds one code 441. It is not provided in the code pattern 44 (code 441), and is provided only in the pressure-sensitive adhesive layer 13 and the base material 12. The tamper-proof label 4 is the same as the tamper-proof label 1 except for these points.
Since the tamper-proof label 4 is arranged without the adjacent cords 441 coming into contact with each other, the code pattern 44 does not need to be composed of two or more colors, and can be composed of one color (single color). For the same reason, the notch 40 does not need to be provided in the code pattern 44. And by arrange | positioning adjacent code | cord | chords 441 without contacting, in the falsification prevention label 4, the surface 13a of the base material 13 is partially exposed.

  The thickness of the code 441 (the thickness of the code pattern 44) can be the same as the thickness of the first code 141 to the fourth code 144 of the tamper-proof label 1 shown in FIG.

In the code pattern 44, the notch 40 may be provided in the code pattern 44 so as to divide one or more codes 441.
Here, although a code pattern consisting of a dot-like code is shown, the shape of the code when viewed from above may be another shape.
The shape, size, and thickness of each cord may all be the same, all may be different, or only a part may be the same.

  Here, the code pattern 44 is composed of six codes, but the number of codes constituting one code pattern 44 is not limited to this. However, the number of codes constituting one code pattern 44 is preferably 6-50.

The tamper-proof label 4 exhibits the same action as the tamper-proof label 1. FIG. 8 is a plan view for schematically explaining the operation when the tamper-proof label 4 shown in FIG. 7 is used.
As shown in FIG. 8A, when the tamper-proof label 4 affixed on the surface 9a of the adherend 9, which is the target adherend, is removed from the adherend 9, it is attached. A segmented region 48 remains on the surface 9 a of the body 9. As shown in FIG. 8B, the defect label 4 ′ obtained by removing has a defect part 49 and a defect code pattern 44 ′.

  When the defective label 4 ′ is reused and pasted on the surface 8a of the adherend 8 different from the original adherend 9, the surface 8a of the adherend 8 becomes as shown in FIG. If the color (pattern) is different from the surface 48 a of the divided region 48, the missing code pattern 44 ′ looks as if it is a new pseudo code pattern 44 ″ different from the original code pattern 44 when looking down. The surface 48a of the divided region 48 includes the surface 13a of the base material 13 and the surface 441a of the code 441. The missing code pattern 44 ′ and the pseudo code pattern 44 ″ are both the original code pattern. 44, since it is not recognized, the code pattern 44 is acquired as initial information, and after this initial information is acquired, the missing code pattern 44 ′ ( By comparing the code pattern 44 ") and similar, to the latest information is different from the initial information, as in the case of falsification prevention label 1, tamperproof labels 4 can be judged to be reused.

(10th Embodiment, 11th Embodiment)
The tamper-proof label 4 shown in FIG. 7 may be configured with two colors including a combination of white and black instead of the color of the code pattern 44 (tenth embodiment). As in the case of No. 3, the code pattern 44 may be a color code pattern composed of three or more colors (11th embodiment).

  In the above-described first to eleventh embodiments, when looking down from above (in a plan view), the notch does not reach these peripheral portions in the base material and the adhesive layer, but the peripheral portions. It is provided so as to surround a specific area other than. However, the tamper-proof label according to the present invention is not limited to this, and the cut may be provided so as to divide the code pattern into two or more regions when looking down from above.

  In the first to eleventh embodiments described above, the code has been described as being configured with a color that can be identified by visible light. However, in the present invention, a part or all of the codes constituting the code pattern (one or two) May be composed of a color that cannot be identified by visible light, for example, formed of infrared absorbing ink or the like.

(Other embodiments)
Up to this point, the tamper-proof label having a code pattern in which the code has a quadrangular or dot shape has been mainly described. However, in the tamper-proof label according to the present invention, the code pattern is not particularly limited as long as it is a two-dimensional code.
Specific examples of the code pattern in the present invention include color barcodes such as a Microsoft tag (Microsoft), a color code (Colorzip), and a chameleon code (Shift); QR code (registered trademark), SP code, CP Matrix type two-dimensional code such as Code, Veri code, Maxi code, DataMatrix, AztecCode, etc .; Stack type two-dimensional code such as PDF417, Code49, etc .; Dot code such as Grid mark (Gridmark), Z code (Toppan TDK Label) However, the present invention is not limited to these.

<Manufacturing method of tamper-proof label>
The tamper-proof label according to the present invention includes, for example, a step of laminating a pressure-sensitive adhesive layer (first pressure-sensitive adhesive layer) and a base material (hereinafter sometimes abbreviated as “lamination step”), and the pressure-sensitive adhesive of the base material. A step of forming a code pattern on the surface opposite to the agent layer side (hereinafter sometimes abbreviated as “code pattern formation step”), and when the code pattern is looked down from above, the code pattern is A process of forming continuous cuts in the pressure-sensitive adhesive layer and the base material, or the pressure-sensitive adhesive layer, the base material, and the code pattern so as to be divided into two or more regions (hereinafter abbreviated as “cut-off forming process”). Can be produced by a production method comprising:
Hereinafter, the tamper-proof label 1 shown in FIG. 1 will be described as an example, and the manufacturing method thereof will be described. FIG. 9 is a cross-sectional view for schematically explaining the method for manufacturing the tamper-proof label 1 shown in FIG.

(Lamination process (first lamination process))
In the laminating step (sometimes referred to as a “first laminating step” in order to distinguish it from a “second laminating step” described later), as shown in FIG. The pressure-sensitive adhesive layer 12 is laminated on the front surface (back surface) 13b.
The pressure-sensitive adhesive layer 12 can be formed by applying a pressure-sensitive adhesive composition to the back surface 13 b of the substrate 13 and drying it. Alternatively, the pressure-sensitive adhesive layer 12 can also be formed by pasting the pressure-sensitive adhesive layer formed by applying the pressure-sensitive adhesive composition on the surface of the release layer of the release material and drying it on the back surface 13 b of the base material 13. In this case, when the above-described release material 11 is used as the release material, the release material 11 does not need to be removed. When a release material other than the release material 11 is used, the release material is removed. FIG. 9A shows a case where the release material 11 is provided.

Examples of the pressure-sensitive adhesive composition include those in which the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 12, the solvent or the dispersion medium, and other components as necessary are blended.
Examples of the solvent or dispersion medium include esters such as ethyl acetate and butyl acetate; ketones such as methyl isobutyl ketone, methyl ethyl ketone and cyclohexanone; aromatic hydrocarbons such as toluene and xylene; alcohol; water and the like.

  The adhesive composition may be applied to the base material 13 or the release material by a known method, such as an air knife coater, blade coater, bar coater, gravure coater, roll coater, roll knife coater, curtain coater, die coater, Examples thereof include a method using various coaters such as a knife coater, a screen coater, a Meyer bar coater, and a kiss coater.

The application amount of the pressure-sensitive adhesive composition to the base material 13 or the release material may be adjusted as appropriate, but the application amount of the pressure-sensitive adhesive is preferably 1 to 100 g / m ² .

  Although the drying conditions of an adhesive layer composition are not specifically limited, It is preferable that temperature is 40-150 degreeC, and it is preferable that time is 20 second-5 minutes.

  The pressure-sensitive adhesive layer 12 is preferably formed by bonding the pressure-sensitive adhesive layer to the base material 13 after forming the pressure-sensitive adhesive layer on the release material under the above conditions.

(Code pattern formation process)
In the manufacturing method, as shown in FIG. 9B, a code pattern forming step of forming a code pattern 14 on the surface 13a opposite to the adhesive layer 12 side of the base material 13 after the lamination step is completed. Do.

The code pattern 14 is formed by applying a code composition (a first code composition, a second code composition, a third code composition, a fourth code composition) to the surface 13a of the substrate 13 and drying it. The 1st code 141 to the 4th code 144 can be formed by forming each at a target location. Here, for example, the first cord composition is a composition for forming the first cord 141.
The first code 141 to the fourth code 144 are preferably formed by a printing method.
The printing method is preferably a gravure printing method, a flexographic printing method, an offset printing method, or a digital printing method such as a UV-inkjet method or an electrophotographic method.

Examples of the cord composition include a colorant, a solvent or a dispersion medium corresponding to each cord, and other components blended as necessary. In the printing method, various types suitable for these methods are used. Ink compositions can be used.
Examples of the solvent or dispersion medium include those similar to the solvent or dispersion medium in the pressure-sensitive adhesive composition, but are not limited thereto.
When the cord can be adjusted to the target color with components other than the colorant, it is not necessary to add a colorant to the cord composition.

(Incision forming process)
In the manufacturing method, as shown in FIG. 9 (c), after the code pattern forming step is completed, when the code pattern 14 is looked down from above, the adhesive is divided into two or more regions. A notch forming step for forming continuous notches 10 in the layer 12, the base material 13 and the code pattern 14 is performed.
The cut 10 can be formed by using a Thomson blade, a pinnacle blade, a die cut roll, or the like.
By performing these steps, the tamper-proof label 1 is obtained.

  In addition, unlike what is shown to Fig.9 (a), when the peeling material 11 is not provided at the time of formation of the adhesive layer 12, the peeling material 11 is separately provided on the back surface 12b of the adhesive layer 12 (attachment). It is preferable that the release material 11 be provided at any time. However, as described above, it is preferable to provide the release material 11 on the back surface 12b of the pressure-sensitive adhesive layer 12 before the cuts 10 are formed in the pressure-sensitive adhesive layer 12, the base material 13, and the code pattern 14. By doing in this way, the release material 11 also functions as a support, and the cut 10 can be stably formed, and the adhesive layer 12, the base material 13 and the code pattern 14 in which the cut 10 is formed are laminated. The structure is maintained more stably.

Among the tamper-proof labels according to the present invention, those in which the second pressure-sensitive adhesive layer and the coating layer are further laminated in this order on the code pattern are the above-described manufacturing methods (hereinafter, in order to distinguish them from other manufacturing methods). (Hereinafter referred to as “Manufacturing Method 1”), a step of laminating the second pressure-sensitive adhesive layer 15 and the coating layer on the code pattern 14 (hereinafter referred to as “second laminating step” in order to distinguish from the laminating step in Manufacturing Method 1). And a lamination process in the production method 1 is referred to as a “first lamination process”) (hereinafter, referred to as “production method 2”).
Hereinafter, the manufacturing method will be described using the tamper-proof label 2 shown in FIG. 4 as an example. FIG. 10 is a cross-sectional view for schematically explaining the method for manufacturing the tamper-proof label 2 shown in FIG.

(Second lamination step)
In the second lamination step, it is usually difficult to sequentially laminate the second pressure-sensitive adhesive layer 15 and the coating layer 16 on the code pattern 14 of the tamper-proof label 1 obtained by the manufacturing method 1. Therefore, first, as shown in FIG. 10A, the second pressure-sensitive adhesive layer 15 is laminated on the surface of the release layer of the release material 21.
The 2nd adhesive layer 15 can be formed by apply | coating a 2nd adhesive composition to the peeling layer surface of the peeling material 21, and making it dry, for example, the case of the 1st adhesive layer 12 in a 1st lamination process, and It can be formed by a similar method. The release material 21 may be the same as the release material 11 in the tamper-proof label 1 or may be a known material other than the release material 11.

  Next, in the second lamination step, the coating layer 16 is laminated on the second pressure-sensitive adhesive layer 15 as shown in FIG. The coating layer 16 can be laminated by pressing and sticking to the second pressure-sensitive adhesive layer. At this time, the second pressure-sensitive adhesive layer may be heated as necessary.

Next, in the second lamination step, as shown in FIG. 10C, the release material 21 is peeled from the laminate of the release material 21, the second pressure-sensitive adhesive layer 15, and the coating layer 16, and then the second pressure-sensitive adhesive layer. The exposed surface of 15 and the code pattern 14 of the tamper-proof label 1 obtained by the manufacturing method 1 face each other and are bonded together.
By performing these steps, the tamper-proof label 2 is obtained as shown in FIG.

  In the second lamination step, the second pressure-sensitive adhesive layer 15 may be directly laminated on the coating layer 16 instead of the release material 21 to form a laminate of the second pressure-sensitive adhesive layer 15 and the coating layer 16. Good.

  Up to this point, the tamper-proof label 1 shown in FIG. 1 and the tamper-proof label 2 shown in FIG. 4 have been described as examples, but other tamper-proof labels are also adjusted as appropriate according to the configuration thereof. And can be manufactured.

  For example, the tamper-proof label 3 shown in FIG. 5 forms a cut 30 instead of the cut 10, that is, when forming a continuous cut in the adhesive layer 12, the base material 13, and the code pattern 14 in the cut forming process. Moreover, it can be manufactured by the same method as the case of the tamper-proof label 1 shown in FIG.

  Further, the tamper-proof label 4 shown in FIG. 7 is the same as the tamper-proof label 1 shown in FIG. 1 except that a code pattern 44 is formed instead of the code pattern 14 and a cut 40 is formed instead of the cut 10. It can be manufactured in the same way as the case. The code pattern 44 is formed by the tamper-proof label 1 except that a dot-shaped code 441 is formed instead of the rectangular color code (first code 141 to fourth code 144). The same process as the process may be performed. And the formation of the cut 40 is not formed in the code pattern 44 (code 441), but when forming continuously on the pressure-sensitive adhesive layer 12 and the substrate 13, except that the formation position is changed. What is necessary is just to perform the same process as the notch formation process in the tamper-proof label 1.

<Method for determining whether or not tamper-proof labels are reused>
A method for determining whether or not a tamper-proof label according to the present invention is reused is a method in which the tamper-proof label according to the present invention is applied to an adherend via the adhesive layer and is applied to the adherend before or after application. The initial information acquired from the code pattern of the tamper-proof label immediately after is compared with the latest information acquired from the code pattern on the adherend after the initial information is acquired, and the latest information is the same as the initial information. In some cases, it is determined that the tamper-proof label is not reused, and the latest information is different from the initial information because a partial area of the code pattern divided by the cut is missing. In this case, it is determined that the tamper-proof label is reused.
In the determination method, the presence / absence of reuse of the tamper-proof label can be determined with high accuracy and speed by a simple process of using the tamper-proof label according to the present invention and collating information acquired from the code pattern.

In the determination method, first, the tamper-proof label is applied to the target adherend through the adhesive layer, and information is obtained from the code pattern of the tamper-proof label before or immediately after application to the adherend. Get (initial information). The initial information acquired here is acquired from the original code pattern whose configuration has not changed, and is accurate information.
The “tamper-proof label immediately after application to the adherend” means that the attachment state has been intentionally changed, such as removal (peeling) or changing the code pattern after application to the adherend. This means a tamper-proof label that has been found to be not (guaranteed), in other words, a tamper-proof label whose composition has not changed since it was applied to the adherend. The length of time that has elapsed since the prevention label was applied to the adherend is not important.

  Acquisition of initial information from the code pattern of the tamper-proof label is preferably performed using a reader. By using a reader, information can be acquired with higher accuracy in a short time, and the acquired information can be easily managed. When a reader is used, information can be acquired with higher accuracy in a short time even if the code pattern is made finer or more complicated.

  The reader can be configured in the same manner as a conventional two-dimensional code reader, for example, information reading means for reading code pattern information, information transmission means for transmitting the read information, and recording the transmitted information Examples include information processing means for performing processing such as collation, display means for displaying the results of information processing, and the like.

  Next, in the determination method, after obtaining the initial information, information (latest information) is further obtained from the code pattern on the adherend. The latest information acquired here is the newest information acquired from a code pattern whose time has passed since the initial information was acquired, and the presence or absence of the change in the configuration is unknown. Information. In other words, the latest information is unknown (not guaranteed) that the tamper-proof label affixed to the adherend has not been intentionally changed in its affixing state, such as removal (peeling) thereafter. ) Obtained from the code pattern of the thing.

  The latest information from the code pattern may be acquired in the same manner as the initial information.

Next, in the determination method, the initial information is compared with the latest information. Here, if the latest information is the same as the initial information, it can be determined that the tamper-proof label is not reused. The reason is that when the tamper-proof label is removed from the adherend (peeled off), for example, as described with reference to FIGS. This is because a part of the divided code pattern is missing in the removed tamper-proof label. Such a defect occurs when the tamper-proof label is removed from the adherend, and there is no such defect, that is, there is no change in the code pattern. It means that it has not been removed from the body and has not been reused.
On the other hand, if the latest information is different from the initial information, it can be determined that the tamper-proof label is removed from the adherend and reused because a part of the region is missing.

  As described above, the tamper-proof label according to the present invention uses a two-dimensional code as a means for preventing tampering, has a simple configuration, and can be manufactured in a simple process, and therefore can be provided at low cost. Further, in the determination method according to the present invention, the presence / absence of reuse of the tamper-proof label can be determined with high accuracy and speed by a simple process of using the tamper-proof label and collating information acquired from the code pattern. Therefore, the tamper-proof label and determination method according to the present invention are suitable for application to general-purpose products that are distributed in large quantities such as food.

  Hereinafter, the present invention will be described in more detail with reference to specific examples. However, the present invention is not limited to the following examples.

[Example 1]
A tamper-proof label shown in FIG. 1 was produced. That is, using an adhesive product (“PETWH50 (A) PAT1 8K” manufactured by Lintec Corporation) using a base material that does not separate into a plurality of layers in the thickness direction, the surface area of the code pattern surface is UV-inkjet on the surface. The code pattern was formed so as to be 4 cm ² . Here, the first code is red, the second code is blue, the third code is yellow, and the fourth code is green. The cut was made using a Thomson blade. In addition, the base material used here was peeled between the base material and the test pressure-sensitive adhesive layer when the interlayer strength was measured by the method described above.

Next, the tamper-proof label was affixed to the surface of the target adherend (genuine product), the code pattern information was obtained with a reader, and then removed (peeled). As a result, the divided region (one first code) formed by the cut remained on the surface of the adherend, and the tamper-proof label became a defective label having a defective portion.
Next, this defect label is pasted on the surface of a black solid adherend (counterfeit product), and information on the code pattern (defect code pattern) is obtained with a reader. As a result of comparison, it was recognized that the information was different from the previously acquired information, and it was determined that the tamper-proof label was reused.

[Example 2]
A tamper-proof label shown in FIG. 4 was produced. That is, the tamper-proof label shown in FIG. 1 was obtained in the same manner as in Example 1. Next, a second adhesive layer (adhesive “MF” manufactured by Lintec Corporation) and a coating layer (PET having a thickness of 16 μm) are provided on the code pattern of the obtained anti-tamper label, and the anti-tamper label shown in FIG. Obtained.

Next, the tamper-proof label was applied to the surface of the target adherend (genuine product), the second adhesive layer and the coating layer were removed, and the code pattern information was obtained with a reader and then removed. (Peeled off). As a result, the divided region (one first code) formed by the cut remained on the surface of the adherend, and the tamper-proof label became a defective label having a defective portion.
Next, this defect label is pasted on the surface of a black solid adherend (counterfeit product), and information on the code pattern (defect code pattern) is obtained with a reader. As a result of comparison, it was recognized that the information was different from the previously acquired information, and it was determined that the tamper-proof label was reused.

[Example 3]
A tamper-proof label shown in FIG. 5 was produced. That is, using an adhesive product (“PETWH50 (A) PAT1 8K” manufactured by Lintec Corporation) using a base material that does not separate into a plurality of layers in the thickness direction, the surface area of the code pattern surface is UV-inkjet on the surface. The code pattern was formed so as to be 4 cm ² . Here, the first code to the fourth code are white or black. More specifically, of the 16 grid-like (4 × 4) codes, the first and fourth from the left of the uppermost row in plan view, the first from the left of the second row, and The 8 codes in total in the 3rd and 3rd row, 2nd and 4th from the left, and 1st and 4th from the left in the bottom row are black, and the remaining 8 codes are white. did. The cut was made using a Thomson blade. In addition, the base material used here was peeled between the base material and the test pressure-sensitive adhesive layer when the interlayer strength was measured by the method described above.

Next, the tamper-proof label was affixed to the surface of the target adherend (genuine product), and the code pattern information was obtained with a reader and then removed. As a result, the divided region (region extending over nine cords) formed by the cut remained on the surface of the adherend, and the tamper-proof label became a defective label having a defective portion.
Next, the defect label is pasted on the surface of a red solid adherend (counterfeit product), and after obtaining information of the code pattern (defect code pattern) with a reader, this information is obtained with the previously obtained information and As a result of comparison, it was recognized that the information was different from the previously acquired information, and it was determined that the tamper-proof label was reused.

[Example 4]
A tamper-proof label shown in FIG. 7 was produced. That is, using an adhesive product (“PETWH50 (A) PAT1 8K” manufactured by Lintec Corporation) using a base material that does not separate into a plurality of layers in the thickness direction, the surface area of the code pattern surface is UV-inkjet on the surface. The code pattern was formed so as to be 4 cm ² . Here, the dot codes are all black. The cut was made using a Thomson blade. In addition, the base material used here was peeled between the base material and the test pressure-sensitive adhesive layer when the interlayer strength was measured by the method described above.

Next, the tamper-proof label was affixed to the surface of the target adherend (genuine product), and the code pattern information was obtained with a reader and then removed. As a result, a divided region (region surrounding one dot-like code) formed by the cut remained on the surface of the adherend, and the tamper-proof label became a defective label having a defective portion.
Next, this defect label is pasted on the surface of a white, plain adherend (counterfeit product) and information on the code pattern (defect code pattern) is obtained with a reader. As a result of comparison, it was recognized that the information was different from the previously acquired information, and it was determined that the tamper-proof label was reused.

[Comparative Example 1]
A prevention label was produced in the same manner as in Example 2 except that the base material was made of high-quality paper having a basis weight of 55 g / m ² . In addition, the base material used here was one in which delamination occurred when the interlayer strength was measured by the method described above.
Next, this tamper-proof label was affixed to the surface of the target adherend (genuine product), and after attempting to acquire the code pattern information with a reader, it was attempted to remove it. As a result, the divided region (one first cord) formed by the cut does not remain on the surface of the adherend, and the base material is separated into two layers in the thickness direction, and the original configuration is maintained. The upper layer portion provided with the coded pattern was taken out with the second pressure-sensitive adhesive layer and the coating layer being laminated. On the surface of the adherend, the lower layer portion of the base material separated into two layers remained together with the pressure-sensitive adhesive layer.
Next, a pressure-sensitive adhesive layer is separately provided on the separated separation surface (the surface opposite to the side provided with the code pattern) of the upper layer portion, and the resulting product is a black, plain adherend (counterfeit product) ), The code pattern information was acquired with a reader, and when this information was compared with the previously acquired information, it was naturally acquired first because the compared code patterns were the same. It was recognized that the information was the same as the information, and it could not be determined that the tamper-proof label was reused.

  The present invention can be used for a tamper-proof label for determining whether or not to reuse.

  1, 2, 3, 4 ... tamper-proof labels, 10, 30, 40 ... notches, 12 ... adhesive layer, 13 ... substrate, 13a ... surface of substrate, 14, 44 ... code pattern, 141 ... first code, 142 ... second code, 143 ... third code, 144 ... fourth code, 441 ... code, 18, 28, 38 , 48 ... division area, 9 ... adherend

Claims (2)

A tamper-proof label that can be used by attaching to an adherend, removing it from the attached adherend, and then re-applying it after being attached to the adherend.
A pressure-sensitive adhesive layer and a base material are laminated, a code pattern is provided on the surface of the base material opposite to the pressure-sensitive adhesive layer side, and a second pressure-sensitive adhesive layer and a coating layer are further provided on the code pattern. Are stacked in order ,
The base material is not separated into a plurality of layers in the thickness direction,
The adhesive layer and the base material, or the adhesive layer, the base material, and the code pattern are provided with a continuous cut so that the code pattern is divided into two or more regions when viewed from above. When the tamper-proof label is removed from the adherend, a part of the adhesive layer, the base material, and the code pattern divided by the cut is left on the adherend. A tamper-proof label characterized by that. Affixing the tamper-proof label according to claim 1 to an adherend through the adhesive layer,
Compare the initial information acquired from the code pattern of the tamper-proof label before or immediately after application to the adherend, and the latest information acquired from the code pattern on the adherend after the initial information acquisition, When the latest information is the same as the initial information, it is determined that the tamper-proof label is not reused, and a partial area of the code pattern divided by the cut is missing, When the latest information is different from the initial information, it is determined that the tamper-proof label is reused. The method for determining whether or not the tamper-proof label is reused.

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