JPH0549115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to a method for producing a breakable adhesive material, in which when the surface layer is peeled off by hand, the breakable layer underneath is easily broken. In particular, the present invention relates to a method for producing an easily destructible adhesive material suitable for use in, for example, price tags and labels to prevent repositioning attached to the openings of containers.

(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 peeling them off at a store or the like and replacing them with other price tags. At times, it is known that there are pieces that separate and break at perforations or cuts, making it possible to tell at a glance that they have been attempted to be peeled off.

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 already been opened 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 labels that can be seen to be peeled off after pasting have come on the market, and are disclosed in Japanese Utility Model Application Publication No. 1077/1983.

This adhesive label is applied by peeling off the release sheet and pressing the exposed adhesive layer against the opening (not shown) of the package. When the adhesive label affixed to the opening is peeled off, only the part of the deposited film that was not directly deposited on the film substrate by the release agent coating is adhered to the opening by the adhesive coating. remain as is. Furthermore, when the opening is opened, the remaining vapor deposited film stuck to the opening 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 such adhesive labels, since metal is vapor-deposited on the film base material and the release agent coating layer,
The film used as the material to be deposited is limited to polyester or the like, and in addition, it is necessary to satisfy various other conditions in order to complete the deposition, which has the disadvantage of increasing costs.

Furthermore, when the film is peeled off, some of the vapor deposited film does not easily remain on the adhesive coated surface and is peeled off while remaining adhered to the film surface, resulting in the formation of characters, etc. with the remaining vapor deposited film. That cannot be done easily. Furthermore, when the film base material is peeled off, a portion of the adhesive coating remains on the adhesive part of the adhered material, causing problems such as stickiness and dust on the exposed adhesive coating surface. However, there were also problems in terms of hygiene.

Therefore, the main object of the present invention is to provide a method for producing an adhesive material that can be recognized as having been peeled off after being pasted, does not cause adhesive to appear on the peeled surface and become sticky, and does not require a vapor deposition process. It is to be.

(Means for Solving the Problems) In the present invention, the adhesive force of the adhesive layer at the adhesive strength decreasing layer portion is a, the force required to destroy the easily breakable layer is b, and the easily breakable layer is a temporary bonding layer. This is a manufacturing method that satisfies the following formulas: a<c, b<d, where c is the force required to peel it off from the surface layer, and d is the adhesive force of the adhesive layer other than the area where the adhesive strength decreases. (a) a step of temporarily adhering a surface material forming a surface layer and an easily destructible layer made of an easily destructible film, foil or sheet with a temporary adhesion layer; and (b) one of the easily destructible layers. (c) forming an adhesive strength reducing layer on a part of one surface of the adhesive layer to reduce the adhesive strength of the adhesive; This is a method for manufacturing adhesive adhesives.

(Function) An adhesive force reducing layer that reduces the adhesive force of the adhesive is partially formed on one surface of the easily destructible layer, and is divided and formed, so that it cannot be attached to the adhered material. The adhesive strength of the easily destructible adhesive material differs between the adhesive layer and the layer with reduced adhesion, and when the surface layer is peeled off, the easily destructible layer is torn and the easily broken layer in the reduced adhesion layer is Only the adhesive peels off from the adhered material.

(Effects of the Invention) According to the present invention, the surface layer and the easily broken layer can be laminated with a temporary adhesion layer such as wax, so that manufacturing can be performed without using a special vapor deposition device unlike in the past. In addition, since various synthetic resins and films can be used as the material for the surface layer, it is possible to manufacture a characteristic easily destructible adhesive material without using special equipment. Therefore, it is also possible to reduce manufacturing costs during manufacturing.

Thereon, an adhesive layer formed on one surface of the easily broken layer and an adhesive force reducing layer laminated on one surface of this adhesive layer that reduces the adhesive force of the adhesive are separated, It is formed so that it can be adhered with different adhesive strengths, so when it is attached to a material, each part will be adhered with a different adhesive strength, causing the surface layer to be pulled. When you peel it off,
It is possible to produce an easily destructible adhesive having a structure in which only the easily destructible layer in the adhesive strength decreasing layer portion is peeled off from the adhered material.

Therefore, according to the manufacturing method of the present invention, the easily breakable layer is torn and separated from other parts and does not return to its original state, so that it can be seen that the easily breakable layer has been separated. , an easily destructible adhesive material that is characterized by being able to tell at a glance that the pasted adhesive material has been peeled off, and also to easily determine whether foreign matter has entered the package cage.
can be manufactured.

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.

(Example) FIG. 1 is a sectional view of a label manufactured by the manufacturing method according to the present invention.

This label 10 is temporarily attached on a release sheet 12, and is made up of an adhesive layer 14, an easily broken layer 16, a temporary adhesive layer 18, and a surface layer 20, which are laminated in this order. In some cases, this adhesive layer 1
An adhesive force reducing layer 22 is laminated to reduce the adhesive force of the surface layer 20, and a printed layer 24 is formed on the surface of the surface layer 20.

The adhesive layer 14 is for giving adhesive force to the label 10, and is formed by applying an adhesive such as a pressure-sensitive adhesive, for example, and is formed on one surface of the easily broken layer 16, and the surface is coated with an adhesive such as a pressure-sensitive adhesive. , its adhesive layer 14
A release sheet 12 is temporarily attached to protect the .

The easily broken layer 16 is made of aluminum foil, or a synthetic resin film typified by a brittle film made by mixing an extender pigment (for example, titanium white, calcium carbonate) with a copolymer resin of vinyl chloride and acrylic. Examples include easily breakable sheets that can be easily torn by hand.

Among them, when this label 10 is bent and attached to a bent part, this temporary adhesive layer 18
It is preferable to use a relatively flexible material that does not peel off when the surface layer 20 attempts to restore its original state against the adhesive force of .

The surface layer 20 is formed to prevent the easily broken layer 16 from being cut or torn, and is temporarily bonded to the easily broken layer 16 via the temporary bonding layer 18 .

The surface layer 20 may be made of a relatively stiff material such as polyester or nylon film, which is difficult to shrink due to heat, or paper or synthetic paper. In order to be able to clearly see the traces of peeling from the surface side of the surface layer 20 when peeled off, it is better to select a transparent or semi-transparent layer. 16
It is easy to see that a part of the label remains on the adhered material, and a part is peeled off from the adhered material and sticks to the surface layer 20, which is more consistent with the intended use of the label. Become.

The temporary adhesion layer 18 is for temporarily adhering the surface layer 20 and the easily broken layer 16 in a state where they cannot be reattached, and is made of, for example, a wax agent such as paraffin or wax. It is formed between the destructible layer 16 and the destructible layer 16 . Note that the adhesive force between the surface layer 20 and the easily broken layer 16 due to the temporary adhesive layer 18 is weaker than the adhesive force of the adhesive layer 14.

The adhesive strength reducing layer 22 is formed by pattern-coating varnish on the surface of the adhesive layer 14,
This eliminates the activity of a pressure-sensitive adhesive such as an adhesive forming the adhesive layer 14.

That is, there is a significant difference in the adhesive strength of the adhesive layer 14 between the part where the adhesive force reducing layer 22 is formed and the part where it is not formed. , the surface layer 2 is pasted on the material to be pasted, and then the surface layer 2
Even when the adhesive layer 14 was peeled off by hand, the adhesive layer 14 remained in contact with the adhered material and was adhered to such an extent that it could not be easily peeled off, but a reduced adhesive strength layer 22 was formed. The parts are formed so that they can be peeled off relatively easily from the adhered material.

A suitable example of this adhesive strength reducing layer 22 is to form it by pattern coating the above-mentioned varnish, etc., but it can also be formed by using synthetic resin, UV rays, etc. that eliminates the activity of the adhesive.
It may also be formed by pattern coating with ink such as ink or oxidative polymerization type ink, vegetable or mineral powder such as wheat flour, starch, talc, etc.

This adhesive strength reducing layer 22 is, for example, "opened".
By pattern printing and coating lines such as letters and pictures, the surface layer 2 is coated as described below.
When the label 10 is peeled off and the easily broken layer 16 is destroyed, a pattern such as the above-mentioned characters ``opened'' is made to appear, which further matches the purpose of use of the label 10.

In this label 10, the adhesive strength of the adhesive layer 14 at the adhesive strength decreasing layer 22 portion is a, and the easily broken layer 1
The force required to destroy 6 is b, and the easily broken layer 16
The force required to peel off the temporary adhesive layer 18 from the surface layer 20 is c, the adhesive force of the adhesive layer 14 other than the adhesive force decreasing layer 22 is d, and the release sheet 12
The structure is such that the following formula is satisfied: a<e<c, b<d (c≦b or c≧b), where e is the force required to separate the adhesive from the adhesive layer 14.

To use this label 10, release sheet 1
2, and the adhesive layer 14 is used to attach it as a price tag or to the opening of a package of sweets, as shown in FIGS. 8a, b, and c, for example.

In this way, in order to open the opening of the package to which the label 10 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 temporarily attached to the easily broken layer 16 with the temporary adhesive layer 18, the easily broken layer 16 is strongly adhered to the adhered material A with the adhesive layer 14, and the adhesive force reducing layer In the region where the adhesive layer 22 is formed, the adhesive layer 14 is weakly bonded compared to the region where the adhesive layer 14 is directly bonded. Therefore, as shown in FIG. 2, when an attempt is made to peel off the label 10, the easily broken layer 16 in the adhesive strength reducing layer 22 portion and the adhesive layer 14 remain intact without forming the adhesive strength reducing layer 22. At the boundary between the exposed portion and the easily destructible layer 16, the easily destructible layer 16 in the adhesive force decreasing layer 22 portion
is peeled off from the adhesive material A, and the easily destructible layer 16 thereon is torn off from the easily destructible layer 16 portion of the adhesive layer 14, and is peeled off from the adhesive material A.

Then, in the easily broken layer 16, the portion where the adhesive strength reducing layer 22 is not formed remains stuck to the adhered material A as it is. Therefore, once the surface layer 20 is peeled off, the easily broken layer 16 is torn at the boundary between the portion where the adhesive strength reducing layer 22 is formed and the portion where it is not formed, and the surface layer 2 is removed again.
0 cannot be attached to the surface of the temporary adhesion layer 18 and will not return to its original state, so the unsealed state can be clearly seen at a glance.

In this example, the label 10 was used for a candy package, but it can also be used for medicine packages, envelopes,
It goes without saying that it can be used as a part to be sealed, such as a bag, and as a price tag displaying the price.

In this specification, sheets, films, and their equivalents are collectively referred to as "sheets" or "films," indicating the most suitable one for each case. Furthermore, the term "sheet" does not only refer to single-wafer type sheets, but also includes roll-up type (web) types.

An embodiment of the present invention will be described below based on an example of an adhesive manufacturing apparatus according to the present invention.

FIG. 3 shows a laminate 3 used in an embodiment of the present invention.
1 is an illustrative view showing an example of an apparatus for manufacturing 0.

This laminate 30 has a temporary adhesive layer 1 on top of the surface layer 20.
8 and the easily broken layer 16 are laminated in that order.

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 unraveled, and the surface material 20a is guided to the temporary adhesive material application device 104.

The temporary adhesive application device 104 is for printing and applying a temporary adhesive 18a such as paraffin or wax to one surface of the surface material 20a, and includes two rollers 106a and 106b and a storage tank 108. The surface material 20a coated with the temporary bonding material 18a is sent to a lamination device 110 that overlays and laminates the next easily breakable material 16a. This laminating device 1
Reference numeral 10 includes a device 112 for loading a rolled body in which easily destructible material 16a such as aluminum foil is wound. In this laminating apparatus 110, rollers 114a,
They are stacked while being pressed at 114b, and then guided to a cooler 116 provided. That is, one end of the breakable material 16a held in a roll is unwound and guided between the roller 114a and the corresponding roller 114b. At this time, these rollers 114a and rollers 11
Between these rollers 114a and 114b, a surface material 20a having a temporary bonding material 18a applied thereon is guided between the rollers 114a and 114b.
0a and the breakable material 16a are overlapped with the temporary adhesive material 18a sandwiched therebetween. In this way, the easily destructible material 1
The stacked body 30 in which 6a are stacked is the cooler 116.
guided by. The cooler 116 is for cooling the temporary adhesive material 18a of the laminate 30. Cooler 11
6, the temporary adhesive material 18a of the laminate 30 is cooled and solidified to form the temporary adhesive layer 18.

This rolled body of laminate 30 is sent to a lamination device 120 shown in FIG. 4.

The laminating apparatus 120 shown in FIG.
The laminate 30 drawn out from the roll filling device 122 that loads this roll is transferred to the next adhesive application device 124.
sent to.

As the adhesive 14a forming the adhesive layer 14, an adhesive such as a hot melt adhesive is used. This adhesive is applied to the easily broken layer 16 of the laminate 30.
When applying the adhesive to the surface of the adhesive, for example, the adhesive may be applied using a coating device 124 as shown in FIG. 4, which applies the adhesive while heating it to an appropriate temperature.
The laminate 30 on which the adhesive 14a has been printed is led to a dryer 126 that includes a device for blowing cold air, and the adhesive 14a is dried to form the adhesive layer 14.

In this way, the laminate 30 with the adhesive layer 14 formed thereon is led to the printing coating device 128 where the adhesion reducing layer 22 is formed next. In this printing coating device 128, a pattern of an adhesive force reducing material 22a such as varnish, which erases the activity of the adhesive layer 14, is printed on the surface of the adhesive layer 14 described above.

This printing coating device 128 is composed of a known printing machine such as an offset printing machine, and is used to coat the laminate 3.
This printing coating device 128 forms an adhesive strength reducing layer 22 on the surface of the adhesive layer 14 with a pattern of lines such as "opened" printed thereon. The laminate 30 on which the adhesive strength reducing layer 22 has been formed is subsequently led to a lamination device 130 for the release sheet 12.

This release sheet laminating device 130 includes two rollers 132a and 132b.
The release sheet 12 with the release agent layer 12a formed on its surface and the surface of the laminate 30 on the adhesive layer 14 side are overlapped by pressing between the laminate 30 and the laminate 30. Release sheet 12
is taken up by the take-up roller 134.

The laminating apparatus 140 shown in FIG. 5 differs from the laminating apparatus 120 shown in FIG.
Furthermore, a release sheet 1 is placed on the surface of the adhesive layer 14.
This is an apparatus for forming adhesive materials using laminated materials temporarily attached. This laminating device 140 has a surface layer 2
0. Adhesive layer 14 laminated on the surface of the easily destructible layer 16 of the laminate 30 formed by laminating the temporary adhesion layer 18 and the easily destructible layer 16 in this order, and the peeling that is temporarily adhered to the surface of the adhesive layer 14 The apparatus 142 includes a device 142 for loading a roll of laminate material including a sheet 12.

The laminated material pulled out from this roll loading device 142 includes a surface layer 20, a temporary adhesion layer 18, an easily broken layer 16
Then, it is led to a peeling device 144 that peels off the laminated material 32 of the adhesive layer 14 and the release sheet 12 temporarily attached to the surface of the adhesive layer 14. This peeling device 144 includes a roller that separates the laminated material 32 and the release sheet 12, and in this peeling device 144, the surface layer 20, the temporary adhesion layer 18, the easily broken layer 16, and the The laminated material 32 made of the adhesive layer 14 has an adhesive force reducing material 22a.
is guided to a printing coating device 146.

This adhesion reducing agent coating device 146 is comprised of a known printing machine or coating device, and prints lines such as appropriate characters such as "opened" or pictures on a part of the surface of the adhesive layer 14. , is a device for coating.

In this adhesion reducing material application device 146, the laminated material 32 on which a suitable pattern has been printed and applied is led to a drying device 148.

This drying device 148 includes, for example, an ultraviolet irradiation device in the case of UV type ink printed and applied by the adhesion reducing agent coating device 146.

By this drying device 148, the adhesion reducing material 2
After the release sheet 2a is dried, the release sheet 12 is peeled off again by the above-described peeling device 144.
In order to overlap the laminate material 32, the laminate material 32 is moved by two rollers 150a and 150b.
is guided to a superimposing device 152 that includes.

The surface layer 20 and the temporary adhesive layer 1 are superimposed on the release sheet 12 by the superposition device 152.
8. The laminated material 32 consisting of the easily broken layer 16 and the adhesive layer 14 on the surface of which the adhesive force reducing layer 22 is formed is wound up by the winding roller 154.

FIG. 6 is an illustrative view showing yet another laminating apparatus 160, which replaces the laminating apparatus 120 shown in FIG.

This laminating device 160 includes a roll loading device 162 for loading rolls of release sheets 12 .

The release sheet 12 pulled out from the roll loader 162 of the release sheet 12 has its release agent layer 12a surface as the lower surface in FIG. is directed to device 164. In this adhesion reducing material application device 164, varnish or the like which is an adhesion reducing material is printed and applied. Then, in this adhesion reducing material application device 164, the release sheet 12 on which the image line consisting of an appropriate pattern has been printed and coated is
Subsequently, it is led to an adhesive applicator 166.

This adhesive applicator 166 uses the release sheet 12
The main roller 168a is for applying the adhesive 14a to the surface of the release agent layer 12a, and
It includes a roller 168b provided opposite to the main roller 168a. And main roller 1
The lower part of the roller 68a is immersed in the adhesive 14a stored in the storage tank 170, and the main roller 16
The adhesive 14a is applied by the main roller 168a to the surface of the release agent layer 12a of the release sheet 12 sandwiched between the release sheet 8a and the roller 168b.

Then, the release sheet 12 on which the adhesive 14a is printed and applied is transferred to a dryer 172 including a heater, for example.
guided by. In the dryer 172, the release sheet 12
The adhesive 14a printed and applied to the adhesive layer 14 is dried to form the adhesive layer 14.
The laminate of the release sheet 12 and the release sheet 12 is guided to a laminate device 174 where a laminate 30 consisting of a surface layer 20, a temporary adhesion layer 18, and an easily broken layer 16 is prepared separately.

The laminating device 174 of this laminated body 30 is a laminated body 30.
It includes a device 176 for loading zero rolls. Laminated body 30 led out from this roll loading device 176
is guided between two rollers 178a and 178b, and connects the surface of the adhesive layer 14 formed on the surface of the release sheet 12 and the easily broken layer 1 of the laminate 30.
6 are overlapped, and the two rollers 178
a and 178b to overlap each other, and the overlapping state is taken up by a winding roller 179.

In the adhesive material manufactured by this laminating device 160, initially, the adhesive force reducing layer 22 printed and applied on the release agent layer 12a surface of the release sheet 12 is attached to the release agent layer 12a.
2a, but after being superimposed on the laminate 30, during use, for example,
When the release sheet 12 is peeled off from the surface of the adhesive layer 14, the release agent layer 12a of the release sheet 12 is removed.
Due to the releasability of the adhesive layer 14, the adhesive force reducing layer 22 is transferred with the adhesive force of the adhesive layer 14 and transferred to the surface of the adhesive layer 14.

In order to make a label using the adhesive material manufactured in this way, this laminate may be loaded into a label manufacturing apparatus including a printing apparatus or the like.

FIG. 7 is an illustrative view showing an example of an apparatus for manufacturing labels.

Such a label manufacturing device 180 includes a release sheet 1
2 is laminated on the surface of the adhesive layer 14.
It includes a holding device 182 for loading zero rolls. Release sheet 1 pulled out from this holding device 182
2 and the laminate 30 is printed in the printing device 1.
84.

This printing device 184 is comprised of a known printing machine such as an offset printing machine. Then, by this printing device 184, on the surface of the surface layer 20,
For example, a printed layer 24 is formed on which lines such as "product name" are printed. The laminate on which the printed layer 24 has been formed in this manner is guided to a die cutter 186.
The die cutting machine 186 includes a so-called die cutter having a cutting blade, and uses this die cutter to cut the surface layer 2.
0, temporary adhesive layer 18, easily broken layer 16 and adhesive layer 1
4 and the printed layer 24 are cut in an appropriate shape.

Note that the die cutter 186 may use a roller with cutting blades, a so-called die roll.

The scored laminate is removed by roller 188a.
Then, the unnecessary part and the label 10 (necessary part) are separated at 188b, the unnecessary part is wound up into a roll by the scraping roller 190, and the label 10 (necessary part) is temporarily attached to the release sheet 12. The film is wound into a roll by a winding roller 192. Note that a score forming machine may be provided in place of the die cutting machine 186 and the winding roller 192. The scoring machine includes a cutting blade. This cutting blade makes cuts in the surface layer 20, the temporary adhesive layer 18, the easily broken layer 16, and the adhesive layer 14, and cuts each label piece 10a.
It is for separating into.

Here, more specifically, it is as follows.

(1) As the surface layer, a polyester film with a thickness of about 50μ is used, and as a wax agent to form a temporary adhesive layer, wax manufactured by Nihon Seiro Co., Ltd. is used, and the wax is applied to the surface of the polyester film. to form a temporary adhesion layer.

Next, an easily breakable layer is formed on this temporary adhesion layer.
Aluminum foil with a thickness of 7 μm was laminated, and the melted wax was dried and solidified.

Furthermore, the adhesive layer 14 is formed by coating the surface of the aluminum foil with an acrylic adhesive (BPS-5127) manufactured by Toyo Ink so that the dry film thickness is 5 to 50 μm. After that, a varnish manufactured by Toyo Ink Co., Ltd. is part-coated to a thickness of 100 to 0.5 μm.

Thereafter, release paper manufactured by Shikoku Paper Industries Co., Ltd. was attached to the surface of the adhesive layer 14.

At this time, the adhesive force a of the adhesive layer at the adhesive strength lowering layer portion is about 1 g, and the force b required to break the easily broken layer is about 200 g, and it is necessary to separate the easily broken layer from the temporary bonding layer. The required force c is about 400 g, the adhesive force d of the adhesive layer other than the adhesive force reduced layer part is about 2000 g, and the force e required to peel the release sheet from the adhesive layer is about 20 g.
It was hot.

The thus constructed pressure-sensitive adhesive sheet was cut into label pieces and pasted onto a material to be pasted (paper box, etc.).

At this time, the adhesive force d to the adhered material is 2000g.
It was hot.

When an attempt was made to forcefully peel off the pasted label piece from the material to which it was applied, the easily broken layer in the area of the adhesive strength decreasing layer was torn at the border with the easily breaking layer in the area where the adhesive strength decreasing layer was not formed. , it was peeled off from the adhered material together with the polyester film forming the surface layer.

(2) As the surface layer, a nylon film with a thickness of about 50μ is used, and as a wax agent to form a temporary adhesive layer, wax manufactured by Nihon Seiro Co., Ltd. is used to apply the wax to the surface of the nylon film. to form a temporary adhesion layer.

Next, an easily breakable layer is formed on this temporary adhesion layer.
A brittle film made by Nippon Carbide Co., Ltd. having a thickness of 7 μm was laminated thereon, and the melted wax described above was dried and solidified.

Further, the adhesive layer 14 is formed by coating the surface of the brittle film with an acrylic adhesive (BPS-5127) manufactured by Toyo Ink so that the dry film thickness is 5 to 50 .mu.m. Thereafter, an adhesion reducing layer is printed using UV ink manufactured by Toka Shiki Co., Ltd. to a thickness of 100 to 0.5 μm.

Thereafter, release paper manufactured by Shikoku Paper Industries Co., Ltd. was attached to the surface of the adhesive layer 14.

At this time, the adhesive force a of the adhesive layer at the adhesive strength lowering layer portion is about 2 g, and the force b required to break the easily breakable layer is about 50 g, and it is necessary to separate the easily breakable layer from the temporary bonding layer. The force c required to release the release sheet from the adhesive layer is approximately 100 g, the adhesive force d of the adhesive layer other than the area where the adhesive strength decreases is approximately 1500 g, and the force e required to peel the release sheet from the adhesive layer is approximately 15 g.
It was hot.

The thus constructed pressure-sensitive adhesive sheet was cut into label pieces and pasted onto a material to be pasted (paper box, etc.).

At this time, the adhesive force d to the adhered material is 1000g.
It was hot.

When an attempt was made to forcefully peel off the pasted label piece from the material to which it was applied, the easily broken layer was torn off at the border of the easily broken layer in the area where the adhesive force reduced layer was not formed. , it was peeled off from the adhered material together with the nylon film forming the surface layer.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a label manufactured by the manufacturing method according to the present invention. FIG. 2 is a sectional view showing the example shown in FIG. 1 in a destroyed state. FIG. 3 is an illustrative view 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 manufacturing a laminated material used in an embodiment of the present invention. FIG. 5 and FIG. 6 are illustrative views showing other examples of the apparatus for manufacturing the laminated material used in the embodiment of the present invention. FIG. 7 is an illustrative view showing an example of an apparatus for manufacturing labels. FIG. 8 is a perspective view showing how to use the example illustrated in FIG. In the figure, 10 is a label, 12 is a release sheet, 14 is an adhesive layer, 16 is an easily broken layer, 18 is a temporary adhesive layer, 20 is a surface layer, 22 is an adhesive strength reducing layer, 24
is a printed layer, 30 is a laminate, 32 is a laminate material, 14a
is an adhesive, 16a is an easily broken material, 18a is a temporary adhesive material,
20a is a surface material, 22a is an adhesive force reducing material, 100
102 is a holding roller, 104 is a temporary adhesive coating device, 110 is a lamination device, 112 is a roll loading device, 114a, 114b are rollers, 116 is a cooling machine, 120 is a lamination device, 122 is a roll loading device , 124 is an adhesive coating device, 126 is a dryer,
128 is an adhesion reducing material printing and coating device, 130 is a release sheet laminating device, 132a, 132b are rollers, 134 is a winding roller, 140 is a laminating device,
142 is a roll loading device, 144 is a peeling device, 1
46 is an adhesion reducing material application device, 148 is a drying device, 150a, 150b are rollers, 152 is a superimposing device, 154 is a winding roller, 160 is a laminating device, 162 is a roll loading device, 164 is an adhesion reducing material 166 is a printing coating device, 166 is an adhesive coating device, 168a is a main roller, 168b is a roller, 170 is a storage tank, 172 is a dryer, 174 is a laminating device, 176 is a roll loading device, 178
a, 178b are rollers, 179 is a winding roller,
180 is a label manufacturing device, 182 is a holding device, 1
84 is a printing device, 186 is a die cutting machine, 188a, 1
88b is a roller, 190 is a scrap removing roller, 19
2 indicates a winding roller.

Claims (1)

[Scope of Claims] 1. The adhesive force of the adhesive layer at the adhesive strength-decreased layer portion is a, the force required to destroy the easily breakable layer is b, and the easily breakable layer is peeled off from the surface layer at the temporary adhesion layer. (a) Surface layer (b) forming an adhesive layer on one surface of the easily breaking layer; (c) forming an adhesive force reducing layer on a part of one surface of the adhesive layer to reduce the adhesive force of the adhesive. 2. The method for producing an easily breakable adhesive material according to claim 1, wherein step (c) includes a step of temporarily attaching a release sheet to one surface of the adhesive layer. 3 In step (c), the adhesion reducing material forming the adhesion reducing layer is temporarily attached to a release sheet and superimposed on the adhesive layer to transfer the adhesion reducing material to the surface of the adhesive layer. 3. A method for producing an easily breakable adhesive material according to claim 1 or 2, comprising the step of forming an adhesive force reducing layer on the surface of the adhesive layer. 4 The step (c) is to temporarily attach a release sheet to one surface of the adhesive layer, then peel off the release sheet again from the adhesive layer surface, and print and coat the adhesive force reducing material on the adhesive layer surface. 3. A method for producing an easily destructible adhesive material according to claim 1 or 2, comprising the step of forming an adhesive force-reducing layer. 5. In step (a), a temporary adhesive material that forms a temporary adhesive layer is printed and coated on the surface of a surface material that forms a surface layer, and an easily destructible material that forms an easily destructible layer is applied on the surface of the temporary adhesive material. A method for producing a breakable adhesive material according to any one of claims 1 to 4, which includes a step of laminating. 6. The method according to any one of claims 1 to 4, wherein the step (a) includes a step of sequentially laminating a temporary adhesion layer and an easily broken layer on the surface of a surface material made of a synthetic resin film. Manufacturing method for easily destructible adhesive material. 7. The easily breakable adhesive according to claim 6, wherein step (a) includes a step of sequentially laminating a temporary adhesive layer and an easily breakable layer on the surface of a surface material made of a transparent synthetic resin film. The manufacturing method of the material. 8 The step (a) includes the step of printing and applying a temporary adhesive material made of wax on the surface of the surface material forming the surface layer, and laminating an easily breakable layer on the surface of the temporary adhesive material. A method for producing an easily destructible adhesive according to Scope 5. 9 The step (a) is a step of forming a temporary bonding layer on the surface of the surface material forming the surface layer, and laminating an easily broken material made of aluminum foil on the surface of the temporary bonding layer to form an easily breaking layer. A method for producing an easily breakable adhesive material according to any one of claims 1 to 8, which comprises: 10 In step (a), a temporary bonding layer is formed on the surface of the surface material forming the surface layer, and a breakable material made of a breakable synthetic resin film is laminated on the surface of the temporary bonding layer to make the surface layer easy to break. 9. A method for producing a breakable adhesive material according to any one of claims 1 to 8, which comprises a step of forming a layer. 11. The easily destructible adhesive material according to any one of claims 1 to 10, wherein the step (b) includes a step of applying a pressure-sensitive adhesive to form an adhesive layer. Manufacturing method. 12. The step (c) includes a step of printing and coating an adhesion reducing material made of varnish on the surface of the adhesive layer to form an adhesion reducing layer. A method for manufacturing the easily destructible adhesive material according to any one of the above. 13. The step (c) includes a step of forming an adhesion reducing layer by applying an adhesion reducing material containing synthetic resin as a main component to the surface of the adhesive layer. 12. A method for producing an easily destructible adhesive material according to any one of Item 11. 14 In step (c), on the surface of the adhesive layer,
14. The method for producing a breakable adhesive material according to claim 13, which comprises the step of printing an adhesion reducing material made of an ink such as a UV type ink to form an adhesion reducing layer. 15. The step (c) includes a step of applying an adhesion reducing material made of powder to the surface of the adhesive layer to form an adhesion reducing layer.
A method for producing an easily destructible adhesive material according to any one of Items 1 to 11. 16. Any one of claims 1 to 14, wherein the step (c) includes a step of pattern-coating an adhesion-reducing material on the surface of the adhesive layer to form an adhesion-reducing layer. The manufacturing method of the easily destructible adhesive material described in .