JP5396007B2 - Tamper-proof adhesive label - Google Patents

Description

  The present invention relates to an anti-tampering adhesive label. More specifically, a half-cut portion having a pressure-sensitive adhesive layer on the back side of the pseudo-adhesive base material laminated via the pseudo-adhesive interface and reaching the pseudo-adhesive interface from the front or back surface of the pseudo-adhesive base material is provided. If the label attached to the adherend is peeled off, peeling occurs from the pseudo-adhesive interface and the half-cut part remains, or the pseudo-adhesive substrate is destroyed at the half-cut part. The present invention relates to an anti-tampering pressure-sensitive adhesive label that can be easily identified as being peeled off and that is easy to manufacture.

In order to ensure safety in product use as automobile parts, electrical / electronic parts, precision machine parts, etc. have become smaller, higher density, higher performance in recent years, or through the enforcement of the PL Law, It has become necessary to display features and precautions for handling on each part and product. In this case, the display content must be prevented from being tampered with, and therefore, a tamper-proof label or the like is used.
Also, when consigning or packing an article, if it cannot be prevented with a lock or the like to prevent unfair unpacking of the article or opening of the lid, the opening is usually made with a tamper-proof tape or the like. Sealing is done. For example, when transporting a safety box such as a desk, a cupboard, a safe, or baggage, a tamper-proof tape or a seal is generally affixed to the outside of the drawer, door, lid, or the like.
On the other hand, adhesive labels for sealing are often used for the purpose of proof of products and sealing. However, illegal actions such as once peeling off the sealing label and modifying the contents or replacing the contents and then sealing again with the same label are problematic. For this reason, a tamper-proof label is used in order to prevent unfair label reattachment and reuse.
As such security members such as anti-counterfeiting and tamper-proof labels, tapes, seals, etc., for example, when the member is peeled off from the adherend, the type in which the base material is destroyed, or the peeled trace remains on the adherend. The type is known.
As an anti-tampering member, for example, Patent Document 1 proposes a peeling prevention sheet in which a marking layer, a fixed color layer, a coating-formed non-peeling layer, and an adhesive layer are provided in this order on the back surface of a film substrate. ing. In this peeling prevention sheet, the non-peeling layer is made of a material such as rubber (latex), for example, and the fixed color layer and the adhesive layer are integrated with a strong adhesive force through the non-peeling layer. Has been. When the peeling prevention sheet is attached to the adherend and then peeled off, peeling occurs at the interface between the pressure-sensitive adhesive layer and the adherend, and the adhesion between the fixed color layer and the substrate is maintained. However, a gap occurs between the fixed color layer and the marking layer, and the fixed color layer is deformed, so that hidden characters can be confirmed from the substrate side. However, this peeling prevention sheet has a structure in which a non-peeling layer is directly applied and formed on the fixed color layer for the purpose of facilitating the application of the pressure-sensitive adhesive, and the pressure-sensitive adhesive layer is formed on the non-peeling layer. The production is very complicated.
Patent Document 2 discloses a label base material (A), an easily peelable layer (B) partially laminated on the label base material (A) and having easy peelability, and the label base material (A ) And an easily peelable layer (B) and an ink layer (C) formed of ink, and a layer that is laminated on the ink layer (C) and has removability to the adherend, and a label. An anti-tampering pressure-sensitive adhesive label having a re-peelable follow-up pressure-sensitive adhesive layer (D) that can be peeled off at the interface with the adherend following the base material (A) has been proposed. In this anti-tampering adhesive label, when the label is peeled off from the adherend, it can be identified whether or not it has been peeled off due to a change in the graphic information such as displayed characters and designs, An ink layer (printing layer) is required and the production is complicated.
On the other hand, credit cards, savings and savings cards, various vouchers, identification cards, etc. will cause various troubles if they are counterfeited or tampered with and used illegally, so in order to prevent damage caused by forgery or tampering It is desirable to have a function that can identify the authenticity of each. It is also desirable that luxury products such as watches, leather products, precious metal products, jewelry, clothing, bags and the like have a function for identifying authenticity.
Conventionally, for the purpose of enabling the identification of authenticity of various articles including the above-mentioned articles, a hologram having a manufacturing difficulty from the precision of the structure is often used (see Patent Document 3).
Utility Model Registration No. 3068860 (pages 6-7) JP 2003-84672 A JP 2007-72188 A

  An object of the present invention is to provide an anti-tampering pressure-sensitive adhesive label having a function capable of identifying whether or not it has been peeled off after being attached to an adherend under such circumstances. It was made as.

As a result of intensive studies to achieve the above object, the present inventors have used a pseudo-adhesive substrate laminated through a pseudo-adhesive interface, and provided a pressure-sensitive adhesive layer on the back side of the substrate. The inventors have found that a pressure-sensitive adhesive label provided with a half-cut portion that reaches the pseudo-adhesive interface from the front surface or the back surface of the base material can meet the purpose, and has completed the present invention based on this finding.
That is, the present invention is [1] a pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back side of a pseudo-adhesive substrate laminated via a pseudo-adhesive interface, and a half reaching the pseudo-adhesive interface from the surface of the pseudo-adhesive substrate. A tamper-proof adhesive label, wherein a cut portion is provided and the surface of the pseudo-adhesive substrate is heat-pressed with a mold having irregularities;
[2] The tamper-proof adhesive label according to the above item [1], wherein the convex portion of the mold is disposed so as to be positioned at the half-cut portion, and the mold is heat-pressed.
[3] The above-mentioned [1] or [2], wherein a half-cut portion reaching the pseudo-adhesion interface from the surface of the pseudo-adhesive substrate is provided, and a hologram layer is laminated on the surface of the pseudo-adhesive substrate. Tamper-proof adhesive label,
[4] In the above item [1] or [2], a half-cut portion reaching the pseudo-adhesion interface from the surface of the pseudo-adhesive substrate is provided, and a brittle film layer is laminated on the surface of the pseudo-adhesive substrate. [5] A pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back side of a pseudo-adhesive base material laminated via a pseudo-adhesive interface, and pseudo-adhesion from the back side of the pseudo-adhesive base material A half-cut portion that reaches the interface is provided in a part of the plane so as not to cross the plane of the pseudo-adhesive base material , and the peeling opening of the pressure-sensitive adhesive layer is paste-killed or pressure-sensitive adhesive is provided. adhesive label for tamperproof, wherein the non
Is to provide.

  According to the present invention, the half-cut portion having the pressure-sensitive adhesive layer on the back surface side of the pseudo-adhesive base material laminated via the pseudo-adhesive interface, and reaching the pseudo-adhesive interface from the front surface or the back surface of the pseudo-adhesive base material. If the adhesive label provided is peeled off the label attached to the adherend, peeling occurs from the pseudo-adhesive interface and the half-cut portion remains, or the pseudo-adhesive substrate is destroyed at the half-cut portion, etc. Thus, it is possible to provide an anti-tampering pressure-sensitive adhesive label that can be easily identified as being peeled off and that is easy to manufacture.

The anti-tampering pressure-sensitive adhesive label of the present invention (hereinafter, sometimes simply referred to as pressure-sensitive adhesive label) is a pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back side of a pseudo-adhesive substrate laminated via a pseudo-adhesive interface. A half-cut portion that reaches the pseudo-adhesion interface from the front surface or the back surface of the pseudo-adhesive substrate is provided.
[Pseudo-adhesive substrate]
The pseudo-adhesive substrate used in the anti-tampering pressure-sensitive adhesive label of the present invention may have any structure as long as it has a structure laminated through a pseudo-adhesive interface and can be used as a label substrate. There is no limit.
The pseudo-adhesive interface in the present invention means that the adhesive strength when peeled in the direction of 180 degrees at a speed of 300 mm / min is about 10 to 1000 mN / 50 mm, and when the interface is once peeled off, It refers to an interface that is difficult to re-bond during work.
In the present invention, the pseudo-adhesion interface can be formed between thermoplastic resin layers. Therefore, in the pseudo-adhesive substrate, when the support is a thermoplastic resin film, a thermoplastic resin layer is provided on the back side of the support, and a pseudo-adhesion interface is formed between the support and the thermoplastic resin layer. The thermoplastic resin layer A and the thermoplastic resin layer B are laminated in this order on the back side of the support, and the pseudo-adhesive interface is formed between the A layer and the B layer. It may have a three-layer structure in which is formed.
Further, when the support is a paper base, the thermoplastic resin layer A and the thermoplastic resin layer B are sequentially laminated on the back side of the support, and a pseudo-adhesion interface is formed between the A layer and the B layer. What has the three-layer laminated structure which becomes is preferable.

In the present invention, the combination of the thermoplastic resins forming the pseudo-adhesive interface is not particularly limited, and various combinations such as polystyrene resin / low density polyethylene resin, polyethylene terephthalate resin / low density polyethylene resin, acrylic resin / Combinations of low density polyethylene resin, natural rubber resin / low density polyethylene resin, and the like can be given. Among these, a combination of polystyrene resin / low density polyethylene resin is preferable in terms of pseudo-adhesion performance.
(Support)
There are no particular limitations on the support used for the pseudo-adhesive substrate, for example, paper substrates such as fine paper, kraft paper, coated paper, art paper; polyolefin resins such as polyethylene, polypropylene, various olefin copolymers, Polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polystyrene resins, polyvinyl chloride resins, acrylic resins, polycarbonate resins, polyamide resins, fluorine resins such as polytetrafluoroethylene, and mixtures of these resins or The film which consists of a laminated body can be mentioned.
When using a paper base material for the support, the basis weight is usually selected in the range of 40 to 120 g / m ² , preferably 50 to 100 g / m ² . Moreover, when using a plastic film, thickness is normally selected in the range of 10-300 micrometers, Preferably it is 20-150 micrometers.
In the case of using a plastic film as the support, surface treatment such as an oxidation method or a concavo-convex method can be applied as desired in order to improve adhesion to each layer provided on the front surface and / or back surface. Examples of the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and examples of the unevenness method include a sand blast method, a solvent, and the like. Treatment methods and the like. These surface treatment methods are appropriately selected according to the type of the film, but in general, the corona discharge treatment method is preferably used from the viewpoints of effects and operability. Moreover, the primer process which provides a primer layer can also be performed.
Moreover, in this invention, the partial printing about the information regarding a to-be-adhered body can be given to the surface side of the said support body as needed. The information printing method is not particularly limited, and various conventionally known printing methods can be appropriately employed.

(Method for producing pseudo-adhesive substrate)
Regarding the method for producing the pseudo-adhesive base material, a three-layer laminated structure in which the thermoplastic resin layer A and the thermoplastic resin layer B are sequentially laminated on the back side of the support, and a pseudo-adhesive interface is formed between the A layer and the B layer. The pseudo-adhesive substrate will be described as an example.
In order to produce a pseudo-adhesive substrate, a conventionally known method such as a coating method or the like is used by using one of the thermoplastic resins in the combination of the thermoplastic resins forming the pseudo-adhesive interface on the back side of the support. The thermoplastic resin layer A is provided by an extrusion laminating method or the like. Next, a thermoplastic resin layer B is provided on the thermoplastic resin layer A by using another thermoplastic resin by a coating method, an extrusion laminating method, or the like. In this way, a pseudo-adhesive substrate having a three-layer structure in which a pseudo-adhesion interface is formed between the thermoplastic resin layer A and the thermoplastic resin layer B is produced.
In this case, the thickness of the thermoplastic resin layer A is usually about 0.1 to 10 μm, preferably 0.5 to 5 μm, and the thickness of the thermoplastic resin layer B is usually about 10 to 100 μm, preferably 15 ˜40 μm.
As described above, if the support is a thermoplastic resin film and the material can form a pseudo-adhesive interface, the corresponding thermoplastic resin layer C is formed by a coating method, an extrusion laminating method, or the like. By providing, a pseudo-adhesive substrate having a two-layer laminated structure can be produced. In this case, the thickness of the thermoplastic resin C is usually about 0.1 to 100 μm, preferably 0.5 to 40 μm.

(Processing of pseudo-adhesive substrate)
Next, after partially printing information on the adherend as necessary on the surface of the pseudo-adhesive substrate thus prepared, the half reaching the pseudo-adhesion interface from the front or back surface of the pseudo-adhesive substrate. A cut part is provided. There is no restriction | limiting in particular in the shape of a half cut part, Any, such as circular shape, ellipse shape, triangular shape, linear shape, curve shape, broken line shape, X shape, may be sufficient. This half-cut portion can be performed by using a cutting blade and providing a cut so that the tip thereof reaches the pseudo-adhesive interface. There is no particular limitation on the order of the printing operation and the operation for providing the cut, and either may be performed first, but usually a method of providing the cut after printing is used.
The printing and cutting operations may be performed using a device having both a printing mechanism and a cutting mechanism, or may be performed separately using a device having a printing mechanism and a device having a cutting mechanism. Also good.
In the present invention, when a half-cut portion that reaches the pseudo-adhesion interface from the surface of the pseudo-adhesive base material is provided, the surface of the pseudo-adhesive base material can be thermocompression bonded with a mold having irregularities. As a result of this operation, the pseudo-adhesion strength of the pseudo-bonding interface at the portion heat-pressed by the convex portion of the mold is increased. Therefore, in the present invention, when thermocompression bonding is performed using the mold having the unevenness, it is preferable that the convex portion of the mold is disposed at the half cut portion and thermocompression bonding is performed. If the half-cut shape is circular, ellipsoidal, square, triangular, etc., place the mold so that the convex part of the mold is located inside the half-cut, and then apply heat and pressure to the adherend. When sticking and peeling off, the half cut part tends to remain. If the shape of the half-cut is linear, curved, broken, X-shaped, etc., place it so that the convex part of the mold is located in part or all of the half-cut, When it is applied to the body and peeled off, the pseudo-adhesive base material is destroyed.
When thermocompression bonding with the mold, the temperature is usually about 100 to 180 ° C., preferably 120 to 160 ° C., and the pressure is usually about 1 × 10 ³ to 1 × 10 ⁷ N / mm ² , preferably 1 ×. 10 ⁴ to 1 × 10 ⁶ N / mm ² .

As described above, the anti-tampering pressure-sensitive adhesive label of the present invention is provided with a half-cut portion that reaches the pseudo-adhesion interface from the surface of the pseudo-adhesive substrate, and a hologram layer or brittle material on the surface of the pseudo-adhesive substrate. A structure in which a film layer is laminated is preferable from the viewpoint of the effect of preventing falsification. The hologram layer or the brittle film layer is preferably laminated so as to cover at least a part of the half-cut portion, and more preferably laminated so as to cover the entire half-cut portion.
[Hologram layer]
Holograms can reproduce a three-dimensional image using light interference, and are widely used in various fields as a means for preventing forgery. In the present invention, the type of hologram used for forming the hologram layer is not particularly limited, and any one of conventionally known relief holograms, volume holograms, diffraction gratings, computer-generated holograms, and the like can be selected. Accordingly, by providing a reflective layer and a protective layer, an arbitrary one such as a hologram transfer foil or a hologram label can be appropriately selected. In the falsification-preventing pressure-sensitive adhesive label of the present invention, the layer made of the hologram is preferably one that can be easily broken when the adhesive label is peeled off from the adherend. Therefore, the hologram material is brittle. It is desirable that a cut is made in the hologram layer. In this case, in view of the function of the hologram, the cut is preferably placed in a region other than the pattern of the hologram, and is preferably regular or geometric.
The formation of the hologram layer on the pseudo-adhesive substrate surface is usually performed using a heat-sensitive adhesive. This heat-sensitive adhesive melts or softens when heated and exhibits an adhesive effect. Specific examples include vinyl chloride-vinyl acetate copolymer resins, acrylic resins, and polyester resins. The thickness of the adhesive layer is usually about 0.1 to 30 μm.
The thickness of the hologram layer is usually about 1 to 50 μm, preferably 3 to 25 μm.

[Brittle film layer]
In the anti-tampering pressure-sensitive adhesive label of the present invention, the brittle film constituting the brittle film layer formed on the surface of the pseudo-adhesive substrate is not particularly limited, and any one of conventionally known brittle films can be appropriately selected. It can be selected and used.
The brittle film preferably has a tear strength of about 30 to 200 mN, and more preferably 50 to 170 mN. If the tear strength is in the range of 30 to 200 mN, it is easy to tear and the handleability is good.
Regarding the above tear strength, after leaving the sample to stand at 22-25 ° C. for 1 hour or longer and adjusting in the normal state, 10 test pieces having a size of 50 × 100 mm are stacked, and in accordance with JIS K 7128, the Elmendorf tear test is performed. 6 times, the average value of tear strength is calculated, and the value of 1/10 is taken as the tear strength.
Examples of such a brittle film include (1) vinyl chloride resin film, alkyl methacrylate resin, vinyl chloride resin film formed by forming a resin composition containing a plasticizer and a pigment, and (2) acrylic resin. And an acrylic resin film formed by forming a resin composition containing at least one filler selected from fused silica, aluminum hydroxide, barium sulfate, and calcium carbonate, and a plasticizer. it can. The brittle film layer is usually formed using a heat-sensitive adhesive in the same manner as the hologram layer.
The thickness of the brittle film used by this invention is about 5-100 micrometers normally, Preferably it is 10-60 micrometers.
In this way, by providing a brittle film on the surface of the pseudo-adhesive substrate, when the adhesive label for preventing tampering of the present invention is peeled off from the adherend, the brittle film easily breaks and remains, so that the label is It can be easily identified that it has been peeled off.

[Adhesive layer]
In the tamper-proof pressure-sensitive adhesive label of the present invention, a pressure-sensitive adhesive layer is provided on the back surface side of the pseudo-adhesive substrate in order to attach the label to an adherend.
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and any of those conventionally used for pressure-sensitive adhesive layers such as labels can be used as long as the pressure-sensitive adhesive strength is greater than the pseudo-adhesive strength of the pseudo-adhesive substrate. Any one can be appropriately selected and used. For example, 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 can be used. Among these, acrylic pressure-sensitive adhesives are preferably used.
Examples of the acrylic pressure-sensitive adhesive include, as a main component, an acrylic ester homopolymer, a copolymer containing two or more acrylic ester units, and a copolymer of an acrylic ester and another functional monomer. What contains at least 1 sort (s) chosen from the inside is used. Examples of the acrylic ester include (meth) acrylic butyl ester, (meth) acrylic pentyl ester, (meth) acrylic hexyl ester, (meth) acrylic heptyl ester, (meth) acrylic octyl ester, (meth) ) Acrylic acid nonyl ester, (meth) acrylic acid decyl ester and the like. Examples of the functional monomer include hydroxyl group-containing monomers such as (meth) acrylic acid hydroxyethyl ester and (meth) acrylic acid hydroxypropyl ester, and amides such as (meth) acrylamide and dimethyl (meth) acrylamide. Examples thereof include group-containing monomers and carboxylic acid group-containing monomers such as (meth) acrylic acid. In addition, if necessary, other monomers copolymerizable with the acrylate ester, for example, vinyl acetate, styrene, acrylonitrile, etc. may be copolymerized.

This pressure-sensitive adhesive is blended with a tackifier, a crosslinking agent, a filler and the like as desired. As the tackifier, such as rosin-based resins, natural resins such as polyterpene resins, C ₅ based, C ₉ type, DCPD petroleum resins, coumarone-indene resins, and synthetic resins such as xylene resins.
Examples of the crosslinking agent include polyisocyanate compounds, epoxy resins, melamine resins, urea resins, metal chelate compounds, and metal salts. Examples of the filler include zinc white, titanium oxide, silica, and calcium carbonate.
As this pressure-sensitive adhesive, one that does not cause adhesive residue on the adherend is preferable.
There is no particular limitation on the method of forming the pressure-sensitive adhesive layer, and a method of directly applying the pressure-sensitive adhesive to the back surface of the pseudo-adhesive substrate may be used, or first, the pressure-sensitive adhesive layer is first applied to the release treatment surface of the release sheet. Alternatively, a method may be used in which a pressure-sensitive adhesive layer is provided and transferred to the back surface of the pseudo-adhesive substrate. In this transfer method, the release sheet can be stuck as it is. Moreover, in the former method of directly providing a pressure-sensitive adhesive layer, a release sheet may be attached to this pressure-sensitive adhesive layer. When using the label, these release sheets are peeled off and then attached to the adherend.
Examples of the release sheet include paper substrates such as high-quality paper, glassine paper, and coated paper, laminated paper obtained by laminating a thermoplastic resin such as polyethylene on these paper substrates, or polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate. For example, a film obtained by applying a release agent such as a silicone resin to a plastic film such as a polyolefin film such as polypropylene or polyethylene and a release agent layer. Although there is no restriction | limiting in particular about the thickness of this peeling sheet, Usually, it is about 30-150 micrometers.

In the tamper-proof pressure-sensitive adhesive label of the present invention, the thickness of the pressure-sensitive adhesive layer is usually about 5 to 50 μm, preferably 10 to 30 μm.
Moreover, in the tamper-proof adhesive label of the present invention, when a half cut portion reaching the pseudo-adhesion interface from the back surface of the pseudo-adhesive substrate is provided, it is preferable to provide a peeling opening in the pressure-sensitive adhesive layer. The peeling port can be formed by applying paste-killing treatment or not providing an adhesive. The function of such an anti-tampering adhesive label will be described later.
The paste killing process can be performed as follows, for example.
The paste killing process is performed by performing relief printing, intaglio printing or the like on the surface of the adhesive. Examples of the ink used for the paste-killing treatment include ultraviolet curable ink and oxidative polymerization ink, but are not limited thereto.
In the tamper-proof adhesive label of the present invention, the above-described hologram layer and brittle film layer may be laminated before or after the formation of the pressure-sensitive adhesive layer.

[Anti-tampering adhesive label]
The pressure-sensitive adhesive label for tampering prevention of the present invention is a pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back surface side of a pseudo-adhesive substrate laminated via a pseudo-adhesive interface, and includes the following four types (1) to (4) It can be divided roughly into an aspect.
(1) A label having a structure in which a half-cut portion reaching the pseudo-adhesion interface is provided from the surface of the pseudo-adhesive substrate (hereinafter referred to as label I).
(2) A label having a structure in which a half-cut portion reaching the pseudo-adhesion interface is provided from the surface of the pseudo-adhesive base material and a hologram layer is laminated on the surface of the pseudo-adhesive base material (hereinafter referred to as label II). .
(3) A label having a structure in which a half-cut portion reaching the pseudo-adhesion interface is provided from the surface of the pseudo-adhesive base material and a brittle film layer is laminated on the surface of the pseudo-adhesive base material (hereinafter referred to as label III) .)
(4) A label having a structure in which a half-cut portion reaching the pseudo-adhesion interface is provided from the back surface of the pseudo-adhesive base material, and the adhesive layer is peeled off or not provided with an adhesive (hereinafter referred to as an adhesive) , Referred to as Label IV).
Next, the structure of the above-mentioned label I, label II, label III, and label IV and the falsification preventing function will be described with reference to the drawings.

(Label I)
FIG. 1 is a schematic cross-sectional view showing the structure of an example of a label I of the present invention, and the label I10 has a structure in which a pressure-sensitive adhesive layer 4 is provided on the back side of a pseudo-adhesive substrate 5 ( The release sheet attached to the adhesive layer is not shown). The pseudo-adhesive base material 5 is composed of a support 1, a thermoplastic resin layer A2 and a thermoplastic resin layer B3 provided in order on the back surface thereof, and the thermoplastic resin layer A2 and the thermoplastic resin layer B3. A pseudo-adhesive interface P is formed between the two. And the half cut part Q which reaches the pseudo adhesion interface P from the surface of the support body 1 in the pseudo adhesion base material 5 is formed.
When the label I10 affixed to the adherend via the pressure-sensitive adhesive layer 4 is peeled off, peeling occurs from the pseudo-adhesive interface P, and a half-cut portion remains, and it is identified that the label I10 has been peeled off.
FIG. 2 is a schematic view showing a state where a half-cut portion remains when the label I attached to the adherend is peeled off. Reference symbol C indicates a residue of a half cut portion.
In addition, in the said label I, you may heat-press the surface of the pseudo-adhesive base material 5 with the metal mold | die which has an unevenness | corrugation. This thermocompression bonding is preferably performed by placing the mold so that the convex portion is located inside the half-cut portion Q, and by this operation, the adhesive force inside the half-cut portion is increased and half-cut. The part remains easily.

(Labels II and III)
FIG. 3 is a schematic cross-sectional view showing an example of the structure of the label II or III of the present invention. The label II or III 20 is attached to the surface of the pseudo-adhesive substrate 5 in the label I shown in FIG. The hologram layer or the brittle film layer 7 is laminated through the layer 6.
When the label II or III20 affixed to the adherend through the pressure-sensitive adhesive layer 4 is peeled off, the peeling occurs from the pseudo-adhesive interface P, and the hologram layer or the brittle film layer is torn off at the half-cut portion. And it is identified that it has been removed.
FIG. 4 is a schematic diagram showing a state in which the torn part of the hologram layer or the brittle film layer remains when the label II or III attached to the adherend is peeled off, and symbol D indicates the residue. Show.

(Label IV)
FIG. 5 is a schematic cross-sectional view showing the structure of an example of the label IV of the present invention. The label IV30 has a structure in which the pressure-sensitive adhesive layer 4 is provided on the back side of the pseudo-adhesive substrate 5 ( The release sheet attached to the adhesive layer is not shown). The pseudo-adhesive base material 5 is composed of a support 1, a thermoplastic resin layer A2 and a thermoplastic resin layer B3 provided in order on the back surface thereof, and the thermoplastic resin layer A2 and the thermoplastic resin layer B3. A pseudo-adhesive interface P is formed between the two. And the half cut part R which reaches the pseudo adhesion interface P from the back surface in the pseudo adhesion base material 5 is formed. The edge of the pressure-sensitive adhesive layer 4 is provided with a peeling opening (an area without paste removal or pressure-sensitive adhesive) 8, and the label can be peeled off from the surface of the pressure-sensitive adhesive layer through the peeling opening 8. ing.
FIG. 6 is a schematic top view of the label IV of the present invention, and FIG. 7 is a schematic diagram showing a state where the label IV affixed to the adherend is peeled off from the adhesive layer surface.
When the label IV30 affixed to the adherend via the adhesive layer 4 is peeled from the peeling opening 8 provided at the edge of the adhesive layer 4, the label IV is peeled off at the adhesive layer surface, and the pseudo-adhesive interface However, as shown in FIG. 7, in the half cut portion R that cannot be seen from the surface, the pseudo-adhesive base material indicated by S is broken, so that it cannot be reapplied as it is.
As described above, in the tamper-proof adhesive label of the present invention, when the label affixed to the adherend is peeled off, the half-cut portion remains due to peeling from the pseudo-adhesive interface, or the half-cut portion is simulated. It can be easily identified that the adhesive substrate has been peeled off due to destruction or the like, and it cannot be reapplied. In particular, the anti-tampering pressure-sensitive adhesive label of the present invention having a hologram layer on the surface has both an anti-tampering function and an authenticity identification function, and has high utility value.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Example 1
(1) Production of pseudo-adhesive substrate On one side of a paper substrate made of high-quality paper having a basis weight of 70 g / m ² , a styrene-based resin [manufactured by Asahi Kasei Co., Ltd., trade name “Styron G8259”] was solidified with toluene 15 It melt | dissolved in the mass%, and it coated by the roll-coating method, and formed the 2 micrometer-thick polystyrene layer. Subsequently, a low-density polyethylene resin [manufactured by Asahi Kasei Co., Ltd., trade name “L6810”, melt index 10.0 g / 10 min] is heated and melted by an extruder and extruded onto the polystyrene layer, and a low-density polyethylene layer having a thickness of 32 μm. Were laminated.
As a result, a pseudo-adhesive substrate having a three-layer structure having a pseudo-adhesive interface between the polystyrene layer and the low-density polyethylene layer was obtained. The adhesive force at the pseudo-adhesive interface was 390 mN / 50 mm when peeled off in the direction of 180 degrees at a speed of 300 mm / min.
(2) Production of Release Sheet with Adhesive Layer An acrylic adhesive was applied to the release surface of the release sheet having a thickness of 95 μm and dried to prepare a release sheet with an adhesive layer having a thickness of 20 μm.
(3) Production of anti-tampering adhesive label From the paper substrate side of the pseudo-adhesive substrate produced in (1) above, use a cutting blade to make a cut so that the tip reaches the pseudo-adhesive interface. A circular half-cut portion was provided. Next, the pressure-sensitive adhesive layer surface of the release sheet with the pressure-sensitive adhesive layer produced in the above (2) is in contact with the back surface side (surface of the low-density polyethylene layer) of the pseudo-adhesive base material provided with the half-cut portion. The adhesive label for tampering prevention shown in FIG. In addition, the release sheet is not shown in FIG.
(4) Evaluation of anti-tampering property The anti-tampering pressure-sensitive adhesive label produced in (3) above was peeled off the release sheet and attached to an adherend consisting of a product packaging box. When the affixed label was peeled off from the adherend, peeling occurred from the pseudo-adhesive interface, and a half-cut portion remained as shown in FIG. As a result, it was possible to identify the peeling.

Example 2
In the same manner as in Example 1, a release sheet with a pseudo-adhesive substrate and a pressure-sensitive adhesive layer was produced. Next, from the paper substrate side of the pseudo-adhesive substrate, using a cutting blade, a cut is made so that the tip of the pseudo-adhesive substrate reaches the pseudo-adhesive interface, and a half-cut portion as shown in FIGS. 8 and 9 to be described later Was established. Next, a mold having irregularities is placed so that the convex part is located in the half-cut part, and the pseudo-adhesive substrate is attached for 1 second under conditions of a temperature of 150 ° C. and a pressure of 1 × 10 ⁵ N / mm ^2. Thermocompression bonding was performed.
Next, using the release sheet with the pressure-sensitive adhesive layer, in the same manner as in Example 1, a pressure-sensitive adhesive layer was provided on the back side of the pseudo-adhesive substrate to produce a tamper-proof pressure-sensitive adhesive label.
FIG. 8 is a schematic cross-sectional view showing the structure of the anti-tampering pressure-sensitive adhesive label, FIG. 9 is a top view of the pressure-sensitive adhesive label, reference numeral 10-a is the pressure-sensitive adhesive label, and other numerals are the same as described above.
Using this pressure-sensitive adhesive label, the same operation as in Example 1 was performed to evaluate tamper resistance. As a result, the pseudo-adhesive base material similar to that in FIG. 7 was broken at the half-cut portion. Therefore, once a label is peeled off, it cannot be reapplied.

Example 3
(1) Preparation of pseudo-adhesive base material It manufactured similarly to Example 1 (1).
(2) Preparation of release sheet with pressure-sensitive adhesive layer It was prepared in the same manner as Example 1 (2).
(3) Manufacture of tamper-proof adhesive label From the paper substrate side of the pseudo-adhesive substrate prepared in (1) above, using a cutting blade, make a cut so that the tip reaches the pseudo-adhesive interface and half A cut part was provided. Next, a hologram layer was formed on the paper substrate surface of the pseudo-adhesive substrate. The hologram layer was formed by the following method.
(First laminate)
A PET film [Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.] is prepared as a first film, and a volume hologram recording material having the following composition is applied as a hologram forming material to a gravure coat so as to have a dry film thickness of 7 μm. A surface release treatment PET film [“SP-PET” 50 μm, manufactured by Tosero Co., Ltd.] was laminated on the coated surface to prepare a first laminate.
<Composition of volume hologram recording material>
Binder resin (polymethyl methacrylate resin (molecular weight 200,000)) 50 parts by mass 3,9-diethyl-3′-carboxylmethyl-2,2′-thiacarbocyanine iodine salt 0.5 parts by mass Diphenyliodonium hexafluoroantimo Nate 6 parts by mass 2,2-bis (4- (acryloxydiethoxy) phenyl) propane 80 parts by mass 1,6-hexanediol diglycidyl ether 80 parts by mass Fluorine-based fine particles 8 parts by mass Solvent (methyl isobutyl ketone / n- Butanol = 1/1 (mass ratio)) 200 parts by mass (base / protective layer second laminate)
A PET film [Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.] was prepared as a second film, and a material having the following composition was applied as a protective layer by gravure coating so as to have a dry film thickness of 1 μm. .
<Composition of protective layer forming material>
Polymethylmethacrylate resin (molecular weight; 35000) 97 parts by mass Polyethylene wax (molecular weight; 10,000, average particle size: 5 μm) 3 parts by mass Solvent (methyl ethyl ketone / toluene = 1/1 (mass ratio)) 400 parts by mass (recording of volume hologram) )
A volume hologram was photographed and recorded on a first film / layer of volume hologram recording material / surface release treatment PET film using a laser beam having a wavelength of 532 nm. After the recording, the laminate was heated in an atmosphere of 100 ° C. for 10 minutes, and after the heating, the surface release-treated PET film was peeled off and exposed to the layer of the volume hologram recording material that was exposed to the second film / protective layer. The laminated body was laminated so that the protective layer side was in contact with each other and passed through a pair of heated rollers at 80 ° C. to obtain a laminated body of the first film / volume hologram layer / protective layer / second film. Thereafter, using a high-pressure mercury lamp, the entire surface was irradiated with ultraviolet rays having an irradiation dose of 2500 mJ / cm ^{2 to} fix the volume hologram recording material layer.
(Coating of heat seal layer)
The first film / volume hologram layer / protective layer / second film prepared as described above is peeled off, and a material having the following composition is peeled off on the volume hologram layer, and a gravure coat is applied so that the dry film thickness is 4 μm. Coated with.
<Composition of heat seal layer forming material>
Polyester resin [Byron 550 manufactured by TOYOBO, Tg; −15 ° C., molecular weight 28000] 20 parts by mass Solvent (methyl ethyl ketone / toluene = 1/1 (mass ratio)) 80 parts by mass Transfer temperature 150 ° C. using a hot stamping machine manufactured by Navidas Co., Ltd. At a pressure of 0.8 MPa, transfer was performed so as to cover the half-cut portion on the surface of the paper substrate of the pseudo-adhesive substrate, and the second film was peeled off to transfer the volume hologram.
Next, the pressure-sensitive adhesive layer surface of the release sheet with the pressure-sensitive adhesive layer produced in the above (2) is in contact with the back surface side (surface of the low-density polyethylene layer) of the pseudo-adhesive base material provided with the half-cut portion. The adhesive label for falsification prevention shown in FIG. 3 was produced by bonding. Note that FIG. 3 does not show the release sheet.
(4) Evaluation of anti-tampering property The anti-tampering pressure-sensitive adhesive label produced in (3) above was peeled off the release sheet and attached to an adherend consisting of a product packaging box. When the affixed label was peeled off from the adherend, peeling occurred from the pseudo-adhesive interface, the hologram layer was broken at the half-cut portion, and a residue as shown in FIG. 4 was produced. As a result, it was possible to identify the peeling.

Example 4
(1) Preparation of pseudo-adhesive base material It manufactured similarly to Example 1 (1).
(2) Preparation of release sheet with pressure-sensitive adhesive layer It was prepared in the same manner as Example 1 (2).
(3) Preparation of tamper-proof adhesive label A hologram layer prepared in the same manner as in Example 3 was formed on the paper substrate surface of the pseudo-adhesive substrate. Thereafter, an ellipse-shaped half-cut portion was provided by using a cutting blade so as to penetrate the hologram layer and have its tip reach the pseudo-adhesive interface. Next, the release sheet with the pressure-sensitive adhesive layer produced in (2) above is bonded to the back surface side (the surface of the low-density polyethylene layer) of the pseudo-adhesive layer provided with the half-cut portion so that the pressure-sensitive adhesive layer side is in contact with the release sheet. A tamper-proof adhesive label shown in FIG. 10 was produced.
FIG. 10 is a schematic cross-sectional view showing the structure of the anti-tampering adhesive label, which is denoted by reference numeral 20-a.
Is the adhesive label, and the other symbols are the same as above. In addition, the peeling sheet is not shown in FIG.
(4) Evaluation of anti-tampering property The anti-tampering pressure-sensitive adhesive label produced in (3) above was peeled off the release sheet and attached to an adherend consisting of a product packaging box. When the affixed label was peeled off from the adherend, peeling occurred from the pseudo-adhesive interface, resulting in a half-cut residue as shown in FIG. As a result, it was possible to identify the peeling.

Example 5
In Example 3, instead of the hologram layer, a brittle film [polymethyl methacrylate resin, tear strength 65 mN] having a thickness of 20 μm was provided through a heat-sensitive adhesive layer in the same manner as in Example 3, 3 was prepared.
The anti-tampering pressure-sensitive adhesive label was affixed to an adherend comprising a product packaging box by peeling off the release sheet. When the affixed label was peeled off from the adherend, peeling occurred from the pseudo-adhesive interface, the brittle film layer was broken at the half-cut portion, and a residue as shown in FIG. 4 was produced. As a result, it was possible to identify the peeling.

Example 6
(1) Preparation of pseudo-adhesive base material It manufactured similarly to Example 1 (1).
(2) Preparation of release sheet with pressure-sensitive adhesive layer It was prepared in the same manner as Example 1 (2).
(3) Preparation of tamper-proof adhesive label From the back side (low-density polyethylene layer side) of the pseudo-adhesive substrate produced in (1) above, using a cutting blade, the tip reaches the pseudo-adhesive interface. A half-cut part was provided by cutting. Next, the release sheet with the pressure-sensitive adhesive layer prepared in the above (2) was bonded so that the pressure-sensitive adhesive layer surface was in contact with the back surface side of the pseudo-adhesive substrate provided with the half-cut portion, and then the release sheet was After peeling off, the NO.2 flexonis FT-P made by T & K TOKA Co., Ltd. was printed at the peeling opening of the pressure-sensitive adhesive layer, and then the paste was killed by irradiation with ultraviolet rays. Then, the adhesive sheet for falsification prevention shown in FIG.5 and FIG.6 was produced by affixing a peeling sheet to an adhesive layer again. In addition, the peeling sheet is not shown in FIG.
(4) Evaluation of anti-tampering property The anti-tampering pressure-sensitive adhesive label produced in (3) above was peeled off the release sheet and attached to an adherend consisting of a product packaging box. When the affixed label is peeled off from the peeling opening provided in the pressure-sensitive adhesive layer, the label is peeled off at the pressure-sensitive adhesive layer surface, and does not peel off at the pseudo-adhesive interface, but as shown in FIG. In part, the pseudo-adhesive substrate was broken. Therefore, once a label is peeled off, it cannot be reapplied.

  The tamper-proof adhesive label of the present invention has a function of easily identifying whether or not it has been peeled off after being attached to an adherend, and can be easily manufactured.

It is a cross-sectional schematic diagram which shows the structure of an example of the label of this invention. It is a schematic diagram which shows the state at the time of sticking the label shown in FIG. 1 on a to-be-adhered body, and peeling. It is a cross-sectional schematic diagram which shows the structure of the example from which the label of this invention differs. It is a schematic diagram which shows the state at the time of sticking the label shown in FIG. 3 on a to-be-adhered body, and peeling. It is a cross-sectional schematic diagram which shows the structure of another example of the label of this invention. FIG. 6 is a schematic top view of the label shown in FIG. 5. It is a schematic diagram which shows the state at the time of sticking the label shown in FIG. 5 on a to-be-adhered body, and peeling. 6 is a schematic cross-sectional view showing the structure of a label produced in Example 2. FIG. FIG. 9 is a schematic top view of the label shown in FIG. 8. 6 is a schematic cross-sectional view showing the structure of a label produced in Example 4. FIG.

Explanation of symbols

1 Support 2 Thermoplastic Resin Layer A
3 Thermoplastic resin layer B
4 Adhesive Layer 5 Pseudo Adhesive Base Material 6 Adhesive Layer 7 Hologram Layer or Brittle Film Layer 8 Peeling Port 10 Label I
10-a Label produced in Example 2 20 Label II or III
20-a Label produced in Example 4 30 Label IV
C, D Residue P Pseudo-adhesive interface Q, R Half-cut part S Fracture state of pseudo-adhesive substrate

Claims (5)

  A pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back side of a pseudo-adhesive base material laminated via a pseudo-adhesive interface, provided with a half-cut portion that reaches the pseudo-adhesive interface from the surface of the pseudo-adhesive base material, and An anti-tampering pressure-sensitive adhesive label, wherein the surface of an adhesive substrate is heat-pressed with a mold having irregularities.   The adhesive label for preventing tampering according to claim 1, wherein the convex portion of the mold is disposed so as to be located at the half-cut portion and the mold is thermocompression bonded.   The anti-tampering pressure-sensitive adhesive label according to claim 1 or 2, wherein a half-cut portion reaching the pseudo-adhesion interface from the surface of the pseudo-adhesive substrate is provided, and a hologram layer is laminated on the surface of the pseudo-adhesive substrate.   The anti-tampering pressure-sensitive adhesive label according to claim 1 or 2, wherein a half-cut portion reaching the pseudo-adhesion interface from the surface of the pseudo-adhesive base material is provided, and a brittle film layer is laminated on the surface of the pseudo-adhesive base material. . A pressure-sensitive adhesive label having a pressure-sensitive adhesive layer on the back side of a pseudo-adhesive substrate laminated via a pseudo-adhesive interface, wherein the half-cut portion reaching the pseudo-adhesive interface from the back side of the pseudo-adhesive substrate provided in the plane part of the plane as not to traverse the timber, and peeling openings of the pressure-sensitive adhesive layer, tamper-evident adhesive label, characterized in that the or adhesive is glue killing treatment is not provided .

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