JPH0580676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a label for preventing replacement, and particularly to a label for preventing replacement, which is used, for example, as a price tag or a label attached to the opening of a container.

(Prior art) Conventionally, labels used as price tags and the like to prevent replacement have been made by making appropriate perforations or cuts in the surface base material, and then being peeled off at a store, etc., and attempted to be replaced with another price tag. In some cases, it is known that the material is separated or damaged at perforations or cuts, making it possible to tell at a glance that it has been attempted to be removed.

On the other hand, the adhesive paper attached to the opening of the container to indicate its unopened status may vary depending on the material of the opening of the package and its surface treatment method.
For example, you can pick up a product displayed on a display shelf at a store, easily peel it off on the spot, and after getting foreign objects into the packaging, you can reapply it so that it is not obvious that it was removed. Therefore, you cannot tell whether the package has been opened or not just by looking at the sticker from the outside. Therefore, there is a risk that the contents of the package may be tampered with. For example, poisonous substances may be mixed in with sweets in a package.

Therefore, recently, adhesive papers that show that they have been peeled off after being pasted have become available on the market.

FIG. 7 is a cross-sectional view of such adhesive paper.

This adhesive paper 10 includes a film 20, and a silicon layer 18 is formed on a part of the back surface of the film 20.
is formed. Then, metal is deposited on that surface to form a vapor deposited layer 16. Therefore, a portion of this deposited layer 16 is not directly deposited on the film 20 due to the interposition of the silicon layer 18. Furthermore, a vapor deposition layer 16 and a release sheet 12
and are temporarily attached with a pressure-sensitive adhesive layer 14.

This adhesive paper 10 is obtained by peeling off the release sheet 12 and
The exposed surface of the adhesive layer 14 is pressed against an opening (not shown) of the package to attach it. When the adhesive paper 10 pasted to the opening is peeled off, only the portion of the vapor deposited layer 16' that was not directly deposited on the film 20 by the silicon layer 18 is removed.
It remains glued to the opening with the adhesive layer 14.
Further, when the opening is opened, the remaining vapor deposited layer 16' stuck thereon is cut or torn, thereby making it possible to determine whether the opening has been opened.

(Problems to be Solved by the Invention) However, in the adhesive paper 10, the metal is deposited on the film 20 and the silicon layer 18, so the film as the material to be deposited is limited to polyester or the like. In addition to the above, it is also necessary to satisfy various other conditions, which has the disadvantage of increasing costs. Further, when the film 20 is peeled off, a part of the adhesive layer 14 remains on the adhered part of the material to be adhered, and the surface of the exposed adhesive layer 14 becomes sticky and attracts dust. However, there were also problems in terms of hygiene.

Therefore, the main object of the present invention is to provide a label that can be peeled off after being applied and does not require a vapor deposition process.

(Means for Solving the Problems) The present invention comprises a release sheet, an adhesive layer laminated on one main surface of the release sheet, and a second layer further coated with a resin thereon. , a label comprising a release agent layer laminated on the second layer, and a first layer laminated on the release agent layer, the first layer being the release agent layer and the second layer being laminated on the release agent layer. When the force required to peel the release sheet from the adhesive layer is a, the adhesive force between the adhesive layer and the adhered material is b, and the force required to peel the release sheet from the adhesive layer is c,
This is a re-sticking prevention label that satisfies the following formula c<a<b.

(Function) The adhesive layer gives the label adhesive strength to adhere to the surface of the material to be adhered or the sealing part.

The second layer retains its initial state when the first layer is removed.

The release agent layer allows the second layer and the first layer to be easily separated.

The first layer protects the second layer from cutting or tearing.

(Effects of the Invention) According to the present invention, since the second layer is laminated on the first layer by coating or the like, it can be produced without performing vapor deposition as in the conventional method. Moreover, the second layer and the first layer are temporarily attached through the release agent layer in a state that cannot be reattached, and if you try to peel off the label from the opening of the package, etc., the first layer It can be seen that the applied label has been peeled off because the layer peels off from the second layer and cannot be reapplied. Additionally, once the second layer is cut or torn, it does not return to its original state, indicating that the second layer has been separated. Therefore, it can be seen at a glance that the attached label has been peeled off, and a label that does not require the conventional vapor deposition process can be obtained.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 is a sectional view showing an embodiment of the present invention. The label 10 of this example has a release sheet 12
The adhesive layer 14, the resin layer 16 as the second layer, the release agent layer 18, and the surface layer 20 as the first layer are laminated in this order. A printed layer 24 is formed on the surface of the first layer 20, and a printed layer 22 is also formed on the surface of the second layer 16 on the adhesive layer 14 side.

The adhesive layer 14 is for providing adhesive force to the label 10, is made of an adhesive such as a pressure sensitive adhesive, and is formed between the release sheet 12 and the resin layer 16.

The resin layer 16 is for sealing the opening of the package, for example, and is also for opening the package by being cut or torn when the seal is opened. This resin layer 16 is made of urethane resin, EVA resin, etc.
Release agent layer 1 for resin such as PVA, salt vinyl acetate, acrylic, etc.
It is formed by coating the surface of 8. In addition,
Another example of the resin layer 16 is a resin layer coated with a synthetic resin in which metal powder is mixed with a synthetic resin and is formed so that it can be cut or torn by applying a relatively weak force. etc.

The release agent layer 18 is formed so that the resin layer 16 and the surface layer 20 can be easily separated in a state where they cannot be reattached. It is formed between the resin layer 16 and the surface layer 20 by applying a release agent.

The surface layer 20 is formed to prevent the resin layer 16 from being cut or torn, and is temporarily attached to the resin layer 16 via the release agent layer 18. Examples of the surface layer include paper, synthetic paper, film, and aluminum foil. It is preferable to use a relatively flexible material that does not peel off when the surface layer 20 tries to restore its original state.

The release sheet 12 is for protecting the adhesive layer 14, and includes a release paper made of paper, a synthetic resin sheet, etc., and a release agent such as silicone is coated and printed on the surface of a base material such as paper. A release agent layer 12a is formed.

In this label 10, the force required to peel off the surface layer 20 from the resin layer 16 with the release agent layer 18 is a, and the adhesive layer 14 is attached to the adhered material. If the adhesive force between the release sheet 12 and the adhesive layer 14 is b, and the force required to separate the release sheet 12 from the adhesive layer 14 is c, the structure is such that the force required to separate each part satisfies the formula c<a<b. .

First, the label 10 is peeled off from the release sheet 12, and is pasted on the adhesive layer 14, for example, as a price tag or on the opening of a package of sweets, as shown in FIG.

In order to open the opening of the package to which the label 10 made of the surface layer 20 and the resin layer 16 is attached, the attached label 10 must be peeled off and the sealed portion must be opened. In this case, the surface layer 20 is weakly temporarily attached to the resin layer 16 via the release agent layer 18, while the resin layer 16
is strongly adhered to the opening of the package with the adhesive layer 14, so if you try to peel off the label 10, you can only peel off the surface layer 20, and the resin layer 1
6 remains stuck to the sealing portion together with the adhesive layer 14. Therefore, once the surface layer 20 is peeled off, the surface layer 20 cannot be reattached to the surface of the resin layer 16 and will not return to its original state. It's obvious at a glance.

In order to completely open the opening of the package, the remaining resin layer 16 must be cut, torn, or peeled from the opening.

In addition, in order to open the sealed part, the surface layer 20
If the resin layer 16 is cut or torn at the same time as the resin layer 16 is peeled off, the resin layer 16
You can tell if the package has been opened by looking at its condition.

In this example, the label 10 was used for a package of sweets, but it can also be used for a package of medicine, an envelope, a bag, etc. that should be sealed, and a price tag that displays the price. Of course.

FIGS. 2 and 3 are illustrative views showing an example of an apparatus for manufacturing a laminate used in an embodiment of the present invention.

This laminate 30 has a release agent layer 18 and a resin layer 16 laminated in that order on the surface layer 20.

The apparatus 100 includes a holding roller 102 for holding the surface material 20a forming the strip-shaped surface layer 20 in a roll shape. One end of the surface material 20a held by the holding roller 102 is unwound and guided to the release agent coating device 104.

The release agent application device 104 is for printing and applying a release agent 18a such as silicone resin or fluororesin to the front or back surface of the surface material 20a, and includes two rollers 104a and 104b.
including. The lower part of the roller 104a is the pan 10.
It is immersed in the release agent 18a stored in the tank 4c. Therefore, by rotating the rollers 104a and 104b, the release material 18a is printed and coated on the surface of the facing material 20a guided between them. As the release agent coating device 104, a gravure roll coater, a reverse roll coater, or the like may be used, or a known printing machine such as an offset printing machine or a screen printing machine may be used.

Then, the surface material 20a to which the release agent 18a is printed and coated is heated by a dryer 10 including a heater, for example.
6. In the dryer 106, the surface material 2
The release agent 18a printed and coated on Oa is dried to form a release agent layer 18. The surface material 20a on which the release agent layer 18 has been formed in this manner is guided to the winding device 108.

The surface material 20a rolled up into a roll is transferred to another resin 16a laminating device 110 shown in FIG.
is loaded into.

Laminating device 110 includes two rollers 112 and 114. The lower part of the roller 112 is immersed in a resin 16a such as urethane resin or EVA resin stored in a pan 116. Therefore, by rotating the rollers 112 and 114, the resin 16a is printed and coated on the surface of the release agent layer 18 of the surface material 20a guided between them.
The surface material 20a coated with the resin 16a is further led to a dryer 120, where it is dried and solidified. As a result, the surface of the release agent layer 18 on the surface of the surface layer 20 is coated with the resin 16a, thereby forming the surface base material 30 on which the resin layer 16 is formed. Then, this surface base material 30
is then sent to printing device 130. The printing device 130 is comprised of a known printing machine such as an offset printing machine, and is provided on the transport path of the surface substrate 30. The printing device 130 forms a printed layer 22 on the surface of the resin layer 16 with, for example, characters such as "opened" printed thereon.

The surface base material 30 on which the printed layer 22 is formed in this manner is wound up into a roll shape by a winding roller 140 and held.

FIG. 4 is an illustrative view showing an example of an apparatus for further laminating the adhesive layer 14 and the release sheet 12 using the surface base material 30 shown in FIG.

Apparatus 150 includes a coating device 152 .

The coating device 152 is for coating the surface of the release sheet 12 with the adhesive 14a, and includes a main roller 154 and a roller 156 provided opposite to the main roller 154. The lower part of the main roller 154 is immersed in the adhesive 14a stored in the pan 158, and the main roller Adhesive 14a is applied at 154.

Then, the release sheet 12 on which the adhesive 14a is printed and applied is transferred to a dryer 122 including a heater, for example.
guided by. In the dryer 122, the release sheet 12
The adhesive 14a printed and applied is dried to form the adhesive layer 14. The release sheet 12 on which the adhesive layer 14 is formed in this way is attached to the surface base material 3.
0 to a stacking device 160.

The surface base material laminating device 160 is for laminating the surface base material 30 on the adhesive layer 14 of the laminate of the release sheet 16 and the adhesive layer 14, and holds the surface base material 30 in a roll shape. Holding roller 1 for
62 included. Surface base material 30 held in a roll shape
is unwound at one end and guided between rollers 164 and 166. At this time, adhesive 1 is applied between these rollers 164 and 166.
A laminate 32 coated with 4a is being guided, so that between these rollers 166 and 164 the surface substrate 30 and the release sheet 12 are superimposed with the adhesive layer 14 in between. In this way, the surface base material 30 on which the laminate 32 of the release sheet 12 and the adhesive layer 14 is superimposed is guided to the take-up roller 168.

Next, the surface base material 30 on which the release sheet 12 is laminated with the adhesive layer 14 is introduced into an apparatus for manufacturing labels. FIG. 5 is an illustrative diagram showing an example of an apparatus for manufacturing labels.

Such apparatus 170 includes a holding device 172 into which a roll of surface substrate 30 is loaded with release sheet 12 laminated with adhesive layer 14 . Surface base material 30 and laminate 3 pulled out from holding device 172
The laminate consisting of 2 and 2 is led to a printing device 132.

Further, like the printing device 130, the printing device 132 is composed of a known printing machine such as an offset printing machine. The printing device 132 prints, for example, a "product name" on the surface of the surface layer 20.
A printed layer 24 is formed on which lines such as the following are printed.

The laminate on which the printed layer 24 has been formed in this manner is guided to a die cutting machine 174. The die cutting machine 174 is
It includes a so-called die cutter having a cutting edge, and by this die cutter, the surface layer 20, the release agent layer 18,
Cuts of appropriate shapes are made in the resin layer 16 and the adhesive layer 14.

Note that the die cutting machine 174 may be one using a roll with cutting edges, so-called a die roll.

The surface base material 30 including the cut surface layer 20 and the like is divided into an unnecessary part and a label 10 (necessary part) by rollers 176a and 176b, and the unnecessary part is rolled into a roll by a scraping roller 180. The label 10 (required portion) is rolled up and placed on the take-up roller 17 while temporarily attached to the release sheet 12.
8 into a roll.

Note that the die cutting machine 174 and the winding roller 17
8 may be replaced by a score forming machine. The score forming machine includes a cutting blade. This cutting blade is used to make cuts in the surface layer 20, release agent layer 18, resin layer 16, and adhesive layer 14 to separate each label 10.

Here, more specifically, it is as follows.

(1) Use high-quality paper with a thickness of about 70μ as the first layer,
A silicone resin manufactured by Toray Industries, Inc. is used as a release agent to form the release agent layer, and after coating with a hardening agent, the release agent layer is formed by baking with a dryer. Next, a urethane resin manufactured by Takeda Pharmaceutical Co., Ltd., which forms a second layer, is coated on the release agent layer to a thickness of approximately 5 to 50 microns. At this time, the force (a) required to peel off the urethane resin from the release agent layer was 70 g. Based on the multilayer product of the first layer and second layer created in this way,
A release sheet is produced by coating Shikoku Paper's release paper with Toyo Ink's acrylic adhesive (BPS-5127) to a dry film thickness of 5 to 50 μm. After that, it was laminated with the multilayer product. At this time, the force (c) required to peel off the release paper from the adhesive was 10 g. The thus constructed pressure-sensitive adhesive paper was made into a label and pasted on a material to be pasted (paper box, plastic, glass bottle, etc.). At this time, the adhesive strength (b) to the adhered material was 1500 g. When I tried to forcefully remove the pasted label from the material to which it was applied, the first layer of paper was peeled off first.

(2) Coated paper with a thickness of about 70 μm was used as the first layer, and wax was applied as a release agent to form a release agent layer and dried. Next, a second layer of urethane resin, EVA resin, or the like is coated on this wax to a thickness of about 5 to 50 microns. At this time, the force (a) required to peel off the urethane resin or EVA resin from the wax surface was 100g.
It was hot. The multi-layer product of the coated paper and the second layer prepared in this way was used as a base material and was laminated with a release sheet prepared by coating a release paper with an adhesive to a dry film thickness of 5 to 50 μm. At this time, the force (c) required to peel off the release paper from the adhesive was 10 g. The thus constructed pressure-sensitive adhesive paper was made into a label and pasted on a material to be pasted (paper box, plastic, glass bottle, etc.). At this time, the adhesive strength (b) to the adhered material was 1500 g. When I tried to forcefully remove the pasted label from the material to which it was applied, the first layer of paper was peeled off first.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. FIGS. 2 and 3 are illustrative views showing an example of an apparatus for manufacturing a laminate used in an embodiment of the present invention. FIG. 4 is an illustrative view showing an example of an apparatus for further laminating the adhesive layer 14 and the release sheet 12 using the surface base material 30 shown in FIG. FIG. 5 is an illustrative diagram showing an example of an apparatus for manufacturing labels. FIG. 6 is a perspective view showing how to use the label according to the invention. FIG. 7 is a sectional view showing a conventional example. In the figure, 10 is a label, 12 is a release sheet, 14 is an adhesive layer, 16 is a resin layer, 18 is a release agent layer, 18a is a release agent, 20 is a surface layer, 20a is a surface material, 30 is a surface base material, 32 is a laminate, 102
104 is a holding roller; 104 is a release agent coating device; 104
a, 104b is a roller, 104c is a pan, 108
110 is a winding device, 110 is a laminating device, 120 is a dryer, 122 is a drying device, 130, 132 is a printing device, 140 is a winding roller, 150 is a device, 152 is a coating device, 154 is a main roller,
156 is a roller, 158 is a pan, 160 is a surface base material laminating device, 162 is a holding roller, 164, 16
6 indicates a roller, and 168 indicates a take-up roller.

Claims (1)

[Scope of Claims] 1. A release sheet, an adhesive layer laminated on one main surface of the release sheet, a second layer further coated with a resin thereon, and on the second layer. A label comprising: a release agent layer laminated on the release agent layer; and a first layer laminated on the release agent layer, the force required to peel the first layer from the second layer at the release agent layer. is a, the adhesive force of the adhesive layer to the adhered material is b, and the force required to peel the release sheet from the adhesive layer is c, satisfying the following formula c<a<b, Label to prevent replacement. 2. The repositioning prevention label according to claim 1, wherein the second layer includes a resin layer coated with urethane resin. 3. The repositioning prevention label according to claim 1, wherein the second layer includes a resin layer coated with EVA resin. 4. The label for preventing repositioning according to any one of claims 1 to 3, wherein the release agent layer includes a layer coated with silicone resin. 5. The repositioning prevention label according to any one of claims 1 to 4, wherein the first layer includes a synthetic resin sheet. 6. The repositioning prevention label according to any one of claims 1 to 5, wherein the first layer includes paper. 7. The repositioning prevention label according to any one of claims 1 to 6, wherein the first layer includes a printing layer formed on its main surface.