KR20100066260A - Tape for identification of unsealing - Google Patents

Abstract

PURPOSE: A tape for unsealing identification is provided to enable a user to see the opening mark of the tape by the change of the shape of an identification layer, and to prevent residues from remaining to the surface of an object when removing the tape. CONSTITUTION: A tape for unsealing identification capable of attaching to an object to check the unsealing state comprises the following: a supporting film(201); a release agent layer(202) partially formed on the lower side of the supporting film; identification layers(203a,203b) formed on the lower side of the supporting film and the release agent layer; and an adhesive layer(204) formed on the lower side of the identification layers to be separated with the release agent layer along with the identification layers.

Description

Tape for identification of unsealing

The present invention relates to a tape for confirming the opening that can be opened. Specifically, in the present invention, when the tape for confirming the opening is attached and detached on the adhered surface, the identification layer and the pressure-sensitive adhesive layer under the release agent layer are transferred to different areas, so that the seal can be checked on both sides of the sticker. The present invention relates to a tape for confirming opening so that security can be maintained because the shape of the identification layer that has already changed is maintained even when attached to the adherend again.

In recent years, securing competitiveness by technology development has become a top priority in the industrial field, and awareness of the importance of security of the developed technology is being strengthened. Therefore, companies and research institutes often attach and open the opening confirmation tape to the visitor's camera lens in order to prevent the technical contents from being leaked to the outside by the camera embedded in the mobile phone possessed by the visitor. In addition, there is an increasing demand for a tear-proof tape that can be attached to a package or a briefcase of a security-required object to check whether the package or envelope has been opened.

The tear-proof tape is a security device that leaves a mark after attaching to an object requiring security and then peeling off the sticker. Korean Patent Utility Model No. 1989-9269, which is a prior art document for confirming the opening of a tape, discloses a technique using a pressure-opaque material in which the tape becomes opaque due to the pressure applied when the tape is peeled off. Specifically, the prior document prints a letter which can confirm that the seal is opened on one side of the film made of a pressure-opaque material, and prints a letter that means that the seal is not opened on the other side, so that the sealing tape is peeled off. The present invention relates to a technique for displaying a letter confirming that it is opened by the pressure applied to the tape. However, since the tape may be changed by other external forces in addition to the pressure to remove the tape, there is a problem that can not be made for the convenience of work by manufacturing the tape in the form of a roll.

Korean Patent Utility Model No. 344944 and Patent No. 0840407, which are related to the present invention, have a partial release agent layer partially printed on the back side of the transparent base film layer when the sealed tape is peeled off, as well as color. Disclosed is a technique for unsealing tape which can easily check whether the printed layer (or aluminum vapor deposition layer) is broken irreparably. However, such a technique has a problem in that foreign materials remain on the adhered surface when the tearing tape is removed, and contaminants remain on objects such as a camera lens carried by the visitor.

An object of the present invention is to provide a tape for confirming the opening can be attached to the object to be secured to confirm whether the opening, and no contaminants remain on the object.

The present invention to solve the first problem It provides a tape for confirming opening comprising a support film, a release agent layer partially formed on the bottom surface of the support film, an identification layer formed on the bottom surface of the support film and the release agent layer, and an adhesive layer formed on the bottom surface of the identification layer. At this time, the tear-proof tape is characterized in that the identification layer and the pressure-sensitive adhesive layer formed on the lower surface of the release layer is separated from the lower surface of the release agent layer is transferred to the region where the release agent layer is not formed.

According to one embodiment of the present invention, the identification layer and the pressure-sensitive adhesive layer is separated and separated from the release agent layer and the adhered surface, the transition can be made by moving to bond to the region where the release agent layer is not formed by elasticity.

According to another embodiment of the present invention, in the present invention, it is preferable that the bonding force between the release agent layer and the identification layer is smaller than the bonding force between the adhesive layer and the adhered surface.

According to another embodiment of the present invention, the present invention preferably has a bonding force between the release agent layer and the identification layer is smaller than the bonding force between the support film and the release agent layer.

According to another embodiment of the present invention, the present invention preferably has a bonding force between the adhesive layer and the adhered surface is smaller than the bonding force between the support film and the release agent layer, the bonding force between the support film and the identification layer and the bonding force between the identification layer and the adhesive layer. .

According to another embodiment of the present invention, the present invention may be made of at least one support film selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene naphthalate, polyethylene terephthalate, polycarbonate and polystyrene.

According to another embodiment of the present invention, the release agent layer may be made of at least one selected from the group consisting of cellulose resin, acrylic resin, vinyl resin, paraffin resin and water-soluble resin.

According to another embodiment of the present invention, the present invention preferably comprises an adhesive layer and an tackifier, the composition ratio of the tackifier is 1 to 25 parts by weight based on 100 parts by weight of the elastomer.

According to another embodiment of the present invention, the elastomer may be a rubber, an acrylic copolymer or a mixture thereof.

According to another embodiment of the present invention, it is preferable that the elastomer is a rubber and acrylic copolymer is mixed in a weight ratio of 10:90 to 90:10.

According to another embodiment of the present invention, the present invention may be a resin layer or a metal layer containing a pigment.

According to another embodiment of the present invention, the present invention may be a pigment contained in the identification layer may emit light by ultraviolet rays, or the color may change due to temperature.

According to another embodiment of the present invention, the present invention may be formed of a hologram identification layer.

According to another embodiment of the present invention, the present invention may use a pressure-sensitive adhesive layer mixed with a pigment, without using the identification layer and the pressure-sensitive adhesive layer separately.

According to another embodiment of the present invention, the present invention may further include a release release formed on the lower surface of the pressure-sensitive adhesive layer.

When the tape for confirming opening of the present invention is attached to an object and then peeled off, the identification layer and the adhesive layer formed on the lower surface of the release agent layer of the sticker are transferred to another region, and thus the shape of the identification layer is changed, so that the opening can be checked. By the process, you can check the security status of the product or check whether it is genuine. In addition, the tape for confirming opening of the present invention can check whether the seal is opened on both sides of the sticker, and at the time of opening, since the adhesive layer is completely separated from the surface of the object, it has an advantageous effect of not leaving contaminants or foreign substances on the adherend.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings based on embodiments. The examples presented are exemplary and are not intended to limit the scope of the invention.

Opening confirmation tape of the present invention includes a support film, a release agent layer partially formed on the lower surface of the support film, the identification layer formed on the lower surface of the support film and the release agent layer and the pressure-sensitive adhesive layer formed on the lower surface of the identification layer.

Figure 1a shows one cross-sectional view of the tear tape for checking according to an embodiment of the present invention. Referring to FIG. 1A, the opening confirming tape of the present invention includes a support film 101, a release agent layer 102, an identification layer 103, and an adhesive layer 104. The supporting film 101 is attached to the object to protect the lower layer to be exposed to the outside and serves to maintain the shape of the opening check tape. The release agent layer 102 is partially formed on the lower surface of the support film 101, and is weakly coupled with the identification layer 103 so that a visual change is caused to the identification layer 103 when the tearing tape is removed. have. The identification layer 103 is formed entirely on the lower surfaces of the support film 101 and the release agent layer 102 and has a constant color or shade so that a visual change is observed when the sticker is peeled off. The pressure-sensitive adhesive layer 104 is formed entirely on the lower surface of the identification layer 103, and has adhesiveness to enable adhesion to the adherend surface.

Fig. 1B shows another embodiment of the tear-proof tape of the present invention. Referring to FIG. 1B, the opening confirming tape of the present invention includes a support film 101, a release agent layer 102, and an adhesive layer 105 including a pigment. At this time, the pressure-sensitive adhesive layer 105 containing the pigment is a layer that simultaneously performs the function of giving adhesion to the adhered surface and the identification function to observe the use of the sticker. The pigment may be a solid pigment or a liquid ink having a constant color, and any material may be used as long as it is a material that is not usually called a pigment and can visually determine the presence or absence thereof.

The pressure-sensitive adhesive layer mixed with the identification layer or the pigment forming the tear-proof tape of the present invention may be made of a hologram. The hologram is formed by stacking a plurality of layers printed with a certain shape, and the shape is different according to the viewing angle. Therefore, the opening confirmation tape containing the hologram is difficult to forgery, it is possible to double the security function of the opening confirmation tape. In addition, the pressure-sensitive adhesive layer mixed with the identification layer or the pigment constituting the opening confirming tape of the present invention may be made of a material that emits ultraviolet light or changes color depending on temperature. Using this technique, you can secretly check whether the tear-off tape has been removed.

Although not shown in the drawings, the release check tape may have a release release coupled to the lower surface of the adhesive layer. Release release paper serves to maintain the adhesiveness of the adhesive layer and to allow storage, and is configured to have a very weak adhesive force with the adhesive layer to facilitate separation from the adhesive layer when in use.

2 shows a cross-sectional state after the tearing-off confirmation tape of the present invention is removed from the adherend. Referring to FIG. 2, an area in which the release agent layer 202 is formed is formed in a cross section only by the support film 201 and the release agent layer 202, and an area in which the release agent layer 202 is not formed is in the support film 201. ), The first identification layer 203a, the pressure-sensitive adhesive layer 204, and the second identification layer 203b. Since the identification layers 203a and 203b have a constant color or shade, the tear-opening confirmation tape once removed from the adherend has a trace. Specifically, the region in which the release agent layer 202 is formed is in a state in which the identification layer is removed under the release agent layer 202, so that the opening confirming tape maintains a state different from the color or shadow before peeling off. These changes can be observed on either the front or the back of the tear-off tape. In the drawing, the identification layer and the adhesive layer are completely removed from the lower surface of the release agent layer 202, but some identification layer and the adhesive layer may remain on the lower surface of the release agent layer 202. However, some of the remaining identification layer and pressure-sensitive adhesive layer does not substantially interfere with the use of the tape for checking the opening. In the pressure-sensitive adhesive layer 204 of the region where the release agent layer 202 is not formed, the thickness or the amount of the pressure-sensitive adhesive layer of the adjacent region is transferred, and the lower surface of the pressure-sensitive adhesive layer 202 is transferred. ) Is formed. Although the pressure-sensitive adhesive layer 204 and the second identification layer 203b are shown as forming a layer on the top and bottom, respectively, the pressure-sensitive adhesive layer and the second identification layer may be present in a tangled state without forming a layer. . In the above, only the contents of the tape for confirming the opening separately provided with the identification layer and the pressure-sensitive adhesive layer are described, but similar cross-sections will be observed even when the pressure-sensitive adhesive layer mixed with the pigment is used without a separate identification layer. That is, the area in which the release agent layer is formed will be made of the cross section only with the support film and the release agent layer, and the area in which the release agent layer is not formed will be made with the support film and the adhesive layer. As described above, the tear-opening tape of the present invention can check the history of peeling off the sticker since the state before use and the state after peeling off from the adherend are changed.

3A to 3F show changes in the cross-sectional structure that occurs when the tear-off tape of the present invention is detached from the adhered surface. Referring to FIG. 3A, an opening confirmation tape including a support film 301, release agent layers 302a and 302b, an identification layer 303, and an adhesive layer 304 is attached to the adherend 305. Referring to FIG. 3B, when one end of the tear-opening tape is removed, the pressure-sensitive adhesive layer 304 and the adherend 305 are separated in a region where the release agent layer 302a is not formed, whereby the release agent layer 302a is present. In the region, the release agent layer 302a and the identification layer 303 start to separate. This phenomenon is because the bonding force between the release agent layer 302a and the identification layer 303 is weaker than the bonding force between the adhesive layer 304 and the adherend 305. Referring to FIG. 3C, the release agent layer 302a and the identification layer 303 are completely separated from the peeled off portion of the sticker as the peeling area of the opening confirming tape increases. At this time, the pressure-sensitive adhesive layer 304 also gradually begins to separate from the adherend 305, and in the process, the identification layer 303 and the pressure-sensitive adhesive layer 304 are stretched with elasticity and become thin. In the above, the fact that the release agent layer 302a and the identification layer 303 are completely separated does not mean that the identification layer 303 does not remain on the lower surface of the release agent layer 302a. This means that the bonding between the identification layers 303 is broken on all lower surfaces of the release agent layer 302a. Referring to FIG. 3D, when the peeled area of the opening confirming tape is further extended, the identification layer 303 and the pressure-sensitive adhesive layer 304, which have become thin, are broken. At this time, the part of the identification layer 303 and the adhesive layer 304 which are broken become a part close to the part which started peeling off the opening confirmation tape, and the remainder part expands again with elasticity. Referring to FIG. 3E, when the peeled area of the tear-opening tape is further increased, the broken adhesive layer 304 is separated from the adherend 305 and transferred to an adjacent region. This phenomenon is because the pressure-sensitive adhesive layer 304 is suddenly separated from the adherend 305 in a stretched state with elasticity, so that the adhesive layer 304 is moved to and adhered to an adjacent region by the elastic force. Referring to FIG. 3F, in the open-confirmation tape completely removed from the adherend, no identification layer or pressure-sensitive adhesive layer remains under the release agent layers 302a, 302b, and 302c, and the release agent layers 302a, 302b, and 302c are formed. The identification layer 303 and the pressure-sensitive adhesive layer 304 are transferred to the lower portion of the non-region that is not in the region. The cross-sectional change of the opening confirming tape described with reference to the drawings is schematically illustrated to some extent for the convenience of explanation. That is, some identification layers may remain on the lower surface of the release agent layer of the tear-opening confirming tape that is actually peeled off, and the broken identification layer and the release agent layer may be attached in a stretched state without a transition to an adjacent region. However, even in such a case, if the identification layer that has been changed in the tearing-opening confirmation tape can be visually recognized, there is no problem in the function of the tearing-opening confirmation tape. Even when the pressure-sensitive adhesive layer mixed with the pigment is used without a separate identification layer, further description is omitted because the same phenomenon occurs due to the above-described principle.

In the tape for confirming opening of the present invention, it is important to control the bonding force between the layers. The bonding force between the release agent layer and the identification layer should be weaker than the bonding force between the adhesive layer and the adhered surface. If the bonding force between the release agent layer and the identification layer is greater than the bonding force between the pressure-sensitive adhesive layer and the adhered surface, the release layer and the identification layer cannot be separated when the tearing-opening confirmation tape is peeled off, so that no change can occur in the identification layer. In addition, the bonding force between the release agent layer and the identification layer is preferably smaller than the bonding force between the support film and the release agent layer. If the bonding force between the release agent layer and the identification layer is greater than the bonding force between the support film and the release agent layer, it is because the support film and the release agent layer are separated first and the identification layer and the pressure-sensitive adhesive layer are difficult to transfer to the adjacent area when the tearing-opening confirmation tape is peeled off. . In addition, the bonding force between the adhesive layer and the adhered surface is preferably smaller than the bonding force between the support film and the release agent layer, the bonding force between the support film and the identification layer and the bonding force between the identification layer and the adhesive layer. Otherwise, foreign matters including the adhesive may remain on the adhered surface.

The bonding force relationship between the layers described above can be satisfied by the composition of the material constituting each layer or by a special surface treatment technique.

Next, the substance of each layer contained in the opening confirmation tape of this invention is demonstrated. Since the support film of the opening check tape provides a constant tensile strength to the sticker and protects the lower layer, polymer films of various materials may be used. In addition, the support film is preferably made of a transparent material so that the change in the identification layer of the lower can be observed. The support film constituting the opening confirming tape of the present invention may be made of at least one selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene naphthalate, polyethylene terephthalate, polycarbonate and polystyrene to satisfy these conditions. The lower surface of the support film may be surface treated to enhance the bonding force between the release agent layer and the identification layer. Surface treatment is a method of increasing the cohesion by increasing the roughness of the lower surface of the support film or by introducing a hydrophilic functional group, such as corona treatment, or by forming a separate primer layer to enhance the cohesion Can be used.

The release agent layer should be selected as a material having high bonding strength with the identification layer, and may be made of at least one selected from the group consisting of cellulose resins, acrylic resins, vinyl resins, paraffin resins, and water-soluble resins. The release agent layer may be printed by mixing a water-soluble resin such as an acrylic emulsion in water or printing a gravure resin in an organic solvent, depending on the properties of the material forming the identification layer. The combination of the water-soluble resin, the resin soluble in the organic solvent, water and the organic solvent may be adjusted in various ways in consideration of the bonding strength with the identification layer.

The identification layer may be formed by vacuum depositing a metal, or may be formed by applying a resin layer containing a pigment. When forming the identification layer by vacuum-depositing the metal, it is possible to control the bonding strength with the surface to be deposited by adjusting the process pressure or the deposition rate, etc. At this time, the bonding strength with the supporting film is high and the bonding strength with the release agent layer is important. Do. Such adjustment can be made more easily when the lower surface of the support film is surface-treated. When the identification layer is formed of the resin layer containing the pigment, a resin having a small bonding strength with the material of the identification layer may be selected to adjust the bonding strength with the identification layer. The pigment included in the resin layer may be made of a material that changes color with temperature or emits light in ultraviolet rays. It is also possible to form a plurality of layers having a plurality of patterns so that the identification layer functions as a hologram.

The pressure-sensitive adhesive layer may be made of various compositions depending on the surface properties of the adherend. In the present invention, the pressure-sensitive adhesive layer should have a proper bonding force with the adherend, and at the same time it should be able to stretch and break with a certain elasticity when the security tape falls off the adherend. Such physical properties are determined by the type or mixing ratio of the materials forming the pressure-sensitive adhesive layer. In the present invention, the pressure-sensitive adhesive layer includes an elastomer and an tackfier. The elastomer may be a rubber such as natural rubber, styrene butadiene rubber, polyisobutylene, an acrylic copolymer, or a mixture thereof. The tackifier may be a rosin-based tackifier such as gum rosin, wood rosin or tall rosin, or may be a petroleum-based tackifier such as aliphatic, aromatic or copolymer. . The rosin-based tackifier is preferably used after being modified through a hydrogenation reaction in order to increase stability. In the present invention, the pressure-sensitive adhesive layer preferably contains 1 to 25 parts by weight of a tackifier based on 100 parts by weight of the elastomer. If the tackifier is included in less than 1 part by weight, the bonding force between the security tape and the adherend is too weak to separate the release agent layer and the identification layer, and if it exceeds 25 parts by weight, the viscosity of the adhesive layer is too low to store the security tape. This is difficult. In addition, the elastomer is preferably a mixture of a rubber and an acrylic copolymer in a weight ratio of 10:90 to 90:10. When the rubber is contained in the elastomer less than 10% by weight, the elasticity of the pressure-sensitive adhesive layer is insufficient, the extension of the pressure-sensitive adhesive layer is difficult to occur when peeling off the security tape, if it exceeds 90% by weight, the pressure-sensitive adhesive layer is difficult to be broken and transferred. Therefore, the elastomer is more preferably formed by mixing the rubber and the acrylic copolymer in a weight ratio of 30:70 to 70:30. Instead of separately forming the identification layer and the pressure-sensitive adhesive layer, when using the pressure-sensitive adhesive layer mixed with the pigment, a pigment of a certain component may be mixed and used in the composition of the pressure-sensitive adhesive described above. In this case, it may be necessary to adjust the composition ratio in consideration of the change in bonding strength and elasticity according to the mixing ratio of the pigment.

Release release paper may be made of a general purpose polymer such as polyethylene or polypropylene. In addition, the release release paper may be made of a coating of the polymer film on paper to facilitate the separation of the opening confirmation tape, in addition to those of various materials and forms known in the art.

The method of manufacturing the opening confirmation tape of this invention is as follows. First, a release agent layer having a predetermined pattern is formed on the lower surface of the support film. At this time, optionally the corona treatment on the lower surface of the support film or by coating a primer layer can improve the adhesion. The release agent layer may be formed by various methods such as gravure printing. Subsequently, an identification layer is formed on the lower surface of the supporting film on which the release agent layer is formed. The identification layer may be formed by vacuum-depositing a metal or printing the resin layer on which the pigment is mixed. Finally, an adhesive layer is applied to the lower surface of the identification layer. Application of the pressure-sensitive adhesive layer may be achieved by dissolving an acrylic monomer and an adhesive force control agent in ethyl acetate, toluene, methyl ethyl ketone or a mixed solvent thereof and polymerizing it. In this case, when using the pressure-sensitive adhesive layer mixed with the pigment, the step of forming the identification layer will be omitted.

Hereinafter, the present invention will be described in more detail using examples.

Example

The upper surface of the support film made of polyethylene was treated with corona, and the letters 'VOID' were continuously printed on the resin solution in which the acrylic emulsion and water were mixed in a weight ratio of 9: 1. Subsequently, aluminum was deposited on the entire surface of the supporting film on which letters were printed by a sputtering deposition method. Sputtering deposition was performed by injecting 20 sccm of Ar into the discharge gas in the DC magnetron sputtering deposition machine, and proceeded for 3 minutes without heating the substrate (support film). The deposited aluminum layer was then corona treated again and an adhesive applied thereon. The pressure sensitive adhesive includes 90% by weight of elastomers containing butyl acrylate / acrylic acid copolymer (molar ratio = 97: 3, TOYO Ink manufacturing Co. Ltd) and styrene butadiene rubber in a weight ratio of 6: 4, and tackifier (Estergum AAG) 10 weight% was used in mixture. The butyl acrylate / acrylic acid copolymer was used by dissolving in a mixed solution of ethyl acetate and toluene (weight ratio = 2: 1) in a weight ratio of 85:15, and the tackifier was dissolved in a weight ratio of 5: 5 in ethyl acetate. It was. Finally, the support film applied to the pressure-sensitive adhesive was cut to a size of 5cm x 11cm to prepare a tape for opening confirmation.

Experimental Example

The opening confirmation tape was affixed on the acrylic plate, and after 1 minute had elapsed, the tape was removed by hand from the end of the tape. The appearance of the tape attached to the polyethylene plate and the peeled off tape was visually observed and compared.

Figure 4a is a photograph of the top of the tear-opening tape attached to the acrylic plate, Figure 4b is a photograph of the process of removing the tear-opening tape, Figures 4c and 4d are respectively the front and back of the peeled portion For the picture. Referring to FIG. 4A, the opening confirming tape attached to the acrylic plate has a metallic color on its front surface. Referring to FIG. 4B, the adhesive liquid does not remain at all on the acrylic plate in the process of removing the opening confirming tape. 4C and 4D, the peeled surface of the opening checking tape showed a difference in the color of the surrounding metal due to the transparent portion of the word 'VOID' written on the front and back. As described above, the tape for confirming opening of the present invention is attached to an object and then detached, so that the tape may be visually identified along the pattern of the release agent layer.

Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will be able to make various modifications and modifications to the embodiments without departing from the spirit of the invention. The invention is not limited by these variations and modifications.

1A and 2B illustrate one cross section of an opening confirming tape according to embodiments of the present invention.

2 shows a cross-sectional state after the tearing-off confirmation tape of the present invention is removed from the adherend.

3A to 3F show changes in the cross-sectional structure that occurs when the tear-off tape of the present invention is detached from the adhered surface.

Figure 4a is a photograph of the top of the tear-opening tape attached to the polyethylene plate, Figure 4b is a photograph of the process of removing the tear-opening tape, Figures 4c and 4d are respectively the front and back of the peeled portion For the picture.

Claims (15)

In the opening confirmation tape that can be attached to the adherend to confirm the opening, The opening checking tape includes a support film, a release agent layer partially formed on the bottom surface of the support film, an identification layer formed on the bottom surface of the support film and the release agent layer, and an adhesive layer formed on the bottom surface of the identification layer, When the tearing-off confirmation tape is peeled off from the adhered surface, the tearing-off layer and the pressure-sensitive adhesive layer formed on the lower surface of the mold release layer are separated from the lower surface of the release agent layer and transferred to a region where no release agent layer is formed. tape. The method of claim 1, The transition of the identification layer and the pressure-sensitive adhesive layer, And the identification layer and the adhesive layer are separated from the release agent layer and the adhered surface, and then separated and separated, thereby moving and bonding to an area where the release agent layer is not formed by elasticity. The method of claim 1, Cohesion between the release agent layer and the identification layer, Tape for opening checking, characterized in that less than the bonding force between the pressure-sensitive adhesive layer and the adhered surface. The method of claim 1, Cohesion between the release agent layer and the identification layer, Opening check tape, characterized in that less than the bonding force between the support film and the release agent layer. The method of claim 1, The bonding force between the pressure-sensitive adhesive layer and the adhered surface, Opening check tape, characterized in that less than the bonding force between the support film and the release agent layer, the bonding force between the support film and the identification layer and the bonding force between the identification layer and the adhesive layer. The method of claim 1, The support film is an opening confirmation tape, characterized in that made of at least one selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene naphthalate, polyethylene terephthalate, polycarbonate and polystyrene. The method of claim 1, The release agent layer is a tear tape for opening, characterized in that at least one selected from the group consisting of cellulose resin, acrylic resin, vinyl resin, paraffin resin and water-soluble resin. The method of claim 1, The pressure-sensitive adhesive layer includes an elastomer and a tackifier, and the composition ratio of the tackifier is 1 to 25 parts by weight based on 100 parts by weight of the elastomer. The method of claim 8, The elastomer is an opening confirmation tape, characterized in that the rubber, acrylic copolymer or a mixture thereof. The method of claim 8, The elastomer is an opening confirmation tape, characterized in that the rubber and the acrylic copolymer is mixed in a weight ratio of 10:90 to 90:10. The method of claim 1, The identification layer is an opening confirmation tape, characterized in that the resin layer or a metal layer containing a pigment. The method of claim 11, The pigment for opening confirmation tape, characterized in that the pigment emits light by ultraviolet rays, or the color is changed by temperature. The method of claim 1, The identification layer is a tearing check tape, characterized in that consisting of a hologram. In the opening confirmation tape that can be attached to the adherend to confirm the opening, The opening checking tape includes a support film, a release agent layer partially formed on the bottom surface of the support film, an adhesive layer formed on the bottom surface of the support film and the release agent layer and mixed with a pigment. And when the tearing-off confirmation tape is peeled off from the adhered surface, the pressure-sensitive adhesive layer formed on the lower surface of the mold release layer is separated from the lower surface of the release agent layer and transferred to a region where the release agent layer is not formed. 15. The method of claim 14, The transition of the pressure-sensitive adhesive layer, Opening check tape, characterized in that the pressure-sensitive adhesive layer is separated from the release layer and the adhered surface is broken and then moved to the area where the release layer is not formed by the elastic bond.

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