JP2014044451A - Seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal capable of determining whether a seal is easily peeled off even when the seal is illegally peeled off.SOLUTION: A seal to be used for a purpose to prevent falsification is provided with a base material sheet and an adhesive strength suppressing layer on a part of one surface of the base material sheet. The seal is provided with a color variable sheet in a state in which an adhesive force suppressing layer is covered, and includes: a pressure-sensitive adhesive layer on a reverse side of the surface where the adhesive strength suppressing layer of the color variable sheet is provided, and it is found that the color variable sheet is broken by peeling off the seal from a state adhered to an adhering object through the pressure sensitive adhesive layer, and becomes a color changed part in which the color of a broken interface side edge part is changed and traces thereof are left in the color variable sheet, thereby solving above-mentioned problem.

Description

  The present invention relates to a seal used for an application for preventing falsification such as a seal seal that can leave a trace when a sealed bag or box is opened without permission by a third party.

Hereinafter, a sealing seal will be described as an example of a seal used for the purpose of preventing tampering.
Conventionally, a sealing seal has been formed with a pressure-sensitive adhesive layer necessary for adhering a base sheet to an object to be sealed (corresponding to the adherend of the present invention), and the base sheet and pressure-sensitive adhesive What gave the work for leaving the opening history between agent layers is common. (For example, see Patent Documents 1 and 2)
Examples of sealing seals include a base sheet, a release layer on the back side of the base sheet, a pressure-sensitive adhesive layer provided on the release layer via a metal deposition layer, and the pressure-sensitive adhesive layer. A structure in which a release sheet is temporarily bonded can be raised.

The release sheet can be peeled off from the sealing seal and can be attached to the sealed object. When the sealing seal is peeled off from the sealed object, the release is peeled off at the interface between the release layer and the metal vapor deposited layer, and the metal vapor deposited layer becomes the sealed object. The remaining structure.
Since the sealing seal once peeled off at the interface between the peeling layer and the metal deposition layer cannot be attached again, it functions as an opening history.
Moreover, it has the structure which can express the function as an opening history also by a metal vapor deposition layer remaining in a sealing target object.

In addition, there is a feature that a metal vapor deposition layer having a unique shape can be left on the sealing object by making the peeling layer of the sealing seal into a pattern.
Such seals are used in foods, cosmetics, software for personal computers, industrial products for export, etc. for the purpose of leaving an opening history.
In the case of the above-mentioned sealing seal, even if it is opened, it can be repaired to the extent that it cannot be reasonably judged with a commercially available adhesive, etc., so there is a problem that it is difficult to distinguish between individual consumers who actually use it .

  In addition, since it will be confirmed by the presence or absence of a metal surface, if a base sheet is affixed again from above, it is difficult to instantly determine whether or not it has been opened. There is a problem that it is necessary.

JP 2004-212778 A JP 2005-148325 A JP 2007-314750 A

  Therefore, an object of the present invention is to provide a seal that allows anyone to easily determine whether or not the seal has been peeled off by merely visually observing it from the outside even if the seal is peeled off illegally.

The first aspect of the seal of the present invention is a seal used for the purpose of preventing tampering, wherein the seal is provided with an adhesive force suppression layer on a part of one surface of the base sheet and the base sheet, A color variable sheet is provided in a state of covering the adhesive force suppressing layer, and a pressure sensitive adhesive layer is provided on a surface of the color variable sheet opposite to the side on which the adhesive force suppressing layer is provided. When the seal is peeled off from a state where the seal is adhered to the adherend via the pressure adhesive layer, the pressure-sensitive adhesive layer located in a portion where the adhesive force suppressing layer is not provided is the adherend. The color variable sheet of the portion provided with the adhesive force suppressing layer is peeled between the adhesive force suppressing layer and the color variable sheet, whereby the color variable sheet is broken and the interface side edge is broken. Color change part where the color of the color changed It becomes, characterized in that the traces remain in the color variable sheet.
Moreover, the second aspect of the seal of the present invention is characterized in that the substrate sheet of the first aspect is a resin sheet.

  When the seal of the present invention is peeled off from the state where the seal is applied to the adherend, the color of the fractured interface of the color variable sheet changes when the color variable sheet breaks. Even if it is peeled off, there is an effect that anyone can easily determine whether or not the seal has been peeled off only by visual inspection from the outside.

It is sectional drawing of the sealing seal | sticker which concerns on embodiment of this invention. 1 is a cross-sectional view showing a sealing seal according to an embodiment of the present invention, wherein the sealing seal is peeled off after being attached to an adherend with a pressure-sensitive adhesive layer. FIG. 2 is a plan view showing a sealing seal according to an embodiment of the present invention, wherein the sealing seal is adhered to an adherend with a pressure-sensitive adhesive layer and then peeled off.

Hereinafter, a sealing seal according to an embodiment of a seal used for the purpose of preventing falsification of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the sealing seal 1 according to the embodiment of the present invention is provided with a base sheet 2 and an adhesive force suppressing layer 3 on at least a part of the back surface of the base sheet 2.
The sealing seal 1 is provided with a color variable sheet 4 in a state of covering the adhesive force suppressing layer 3, and a pressure sensitive adhesive layer 5 is provided on the lower surface of the color variable sheet 4.

Further, the sealing seal 1 is provided with a release sheet 6 so as to be peelable on the lower surface of the pressure-sensitive adhesive layer 5, and the sealing seal 1 is attached to the adherend 7 to be sealed by the pressure-sensitive adhesive layer 5. When peeled from the state, the pressure-sensitive adhesive layer 5 located in the portion where the adhesive force suppressing layer 3 is not provided is peeled off from the adherend 7, but the portion provided with the adhesive force suppressing layer 3 is the adhesive force. By peeling between the suppression layer 3 and the color variable sheet 4, the color variable sheet 4 and the pressure-sensitive adhesive layer 5 are stressed, and the color variable sheet 4 is broken when the color variable sheet 4 is broken. The sheet 4 is composed of a color variable sheet 4 having a property that the color of the fractured interface changes.
A release sheet 6 is attached to the back surface of the pressure-sensitive adhesive layer 5 so as to be peelable.

As the base material sheet 2 constituting the sealing seal 1, paper, synthetic paper, a resin sheet or the like can be used, and can be appropriately selected depending on the application.
When the sealing seal 1 is peeled off, it is preferable that the base sheet 2 can be peeled without being stretched. As the base sheet 2, PET or the like can be preferably used.
In order to prevent the color variable sheet 4 from being exposed, it is preferable to use a resin sheet such as PET.
Moreover, there is no restriction | limiting in particular as thickness of the base material sheet 2, The thing of several dozen micrometer-several hundred micrometer can be used suitably, Especially preferably, about 40 micrometer-200 micrometers are used preferably.
If the adhesion to the color variable sheet 4 is low depending on the application, it is necessary to perform an easy adhesion treatment on the base sheet 2. For example, an anchor layer is provided between the base sheet 2 and the color variable sheet 4. It can be provided, or the substrate sheet 2 can be subjected to corona treatment.

Moreover, the adhesive force suppression layer 3 provided on at least a part of the back surface of the base sheet 2 is provided to suppress the adhesion of the color variable sheet 4 to the base sheet 2 and forms the color variable sheet 4. It can be formed by providing a material having a low adhesive strength with respect to the material to be used, and a resin material is used as the material. If you want to reduce the adhesive strength, add wax composed of silicone to the resin material, or use ink composed of silicone resin, fluorine resin, etc. Can do.
The method for configuring the adhesive force suppressing layer 3 can be appropriately selected according to necessary functions such as offset printing, flexographic printing, gravure printing, screen printing, and the like.

Further, the color variable sheet 4 provided on the upper surface of the pressure-sensitive adhesive layer 5 can use a substituted polyacetylene described in JP-A-2007-314750 described in Patent Document 3.
The color variable sheet 4 is preferably easy to break, and the thickness of the color variable sheet 4 is preferably 1 μm to 10 μm.
Moreover, as a method of constructing the color variable sheet 4, a spin coating method is preferably used, but it is not particularly limited.

  In addition, the pressure-sensitive adhesive layer 5 provided on the back surface of the base material sheet 2 only needs to be adhered to the adherend 7 to which the sealing seal 1 is attached, and can be appropriately selected according to the adherend 7. Preferably, by selecting a pressure-sensitive adhesive that has high adhesive strength to the adherend 7 and that is easily broken when stress is applied, the adhesive strength when peeling the sealing seal 1 affixed to the adherend 7 is selected. It becomes easy to fracture | rupture in the cross section of the suppression layer 3. FIG.

  Moreover, the release sheet 6 provided so as to cover the pressure-sensitive adhesive layer 5 can be easily peeled off from the pressure-sensitive adhesive layer 5, and is a base sheet coated with silicone or a fluorine-based resin. It is configured.

Next, the usage method of the sealing seal 1 comprised with the said material is described.
If the release sheet 6 is peeled from the sealing seal 1 to expose the pressure-sensitive adhesive layer 5 and is attached to the adherend 7 and then the adherend 7 is opened, the adhesive strength is suppressed when the seal seal 1 is peeled off from the adherend 7. Only the pressure-sensitive adhesive layer 5 and the color variable sheet 4 in the portion where the layer 3 is provided are broken and remain on the adherend 7, and tension is applied to the fracture surface of the color variable sheet 4 and the color changes. There is an effect that it is possible to determine that the color has been opened by checking the color changing portion 4a of the color variable sheet 4.

  As shown in FIGS. 2 and 3, the color changing portion 4 a of the color variable sheet 4 is a side edge portion of the color variable sheet 4 remaining on the adherend 7, and when the adherend 7 is viewed, the color variable sheet 4 a. Since only the side edge portion 4 is a color changing portion 4a having a color different from that of the other portions, even if the sealing seal 1 is illegally peeled off, the sealing seal can be easily viewed by anyone only from the outside. It can be determined whether or not it has been peeled off.

  Moreover, the pressure-sensitive adhesive layer 5 is provided on the lower surface of the broken color variable sheet 4, and the cross section of the pressure-sensitive adhesive layer 5 that is broken when peeled off from the adherend 7 is deformed. Since the color changing sheet 4 is also deformed and the color change is fixed, the fractured surface does not return to the original state when the peeled base sheet 2 side is pasted again. The effect is expressed.

  As described above, the seal 1 of the present invention is suitable for use by being attached to a package such as cosmetics, but can also be used for preventing tampering by attaching it to personal computer software or the like on which pirated copies are easily distributed. In addition, the present invention can be used for any application that needs to leave a trace of opening and that requires easy confirmation of opening.

1 Sealing seal
2 Base sheet
3 Adhesive strength suppression layer
4 Color variable sheet
4a Color change part
5 Pressure sensitive adhesive layer
6 Release sheet
7 Deposits

Claims (2)

In seals used for applications that prevent tampering,
The seal is
An adhesive force suppression layer is provided on a part of one surface of the base sheet and the base sheet,
A color variable sheet is provided in a state of covering the adhesive force suppressing layer,
A pressure-sensitive adhesive layer is provided on the surface of the color variable sheet opposite to the side on which the adhesive force suppressing layer is provided;
When the seal is peeled off from a state where the seal is stuck to an adherend through the pressure-sensitive adhesive layer,
The pressure-sensitive adhesive layer located in a portion where the adhesive force suppressing layer is not provided peels from the adherend,
The color variable sheet of the portion where the adhesive force suppressing layer is provided peels between the adhesive force suppressing layer and the color variable sheet, whereby the color variable sheet breaks and the color of the fractured interface side edge changes. The seal is characterized by leaving a trace on the color changeable sheet as a color change portion. The seal according to claim 1, wherein the base sheet is a resin sheet.

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