JPH0241145Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Application Field) This invention relates to a band-shaped breakable adhesive tape in which only the surface layer is easily broken by hand, and is particularly used for sealing strips attached to price tags and container openings, etc. The present invention relates to an easily destructible adhesive tape suitable for. (Prior Art) Conventionally, this type of band-shaped sealing piece has been made of, for example, adhesive paper temporarily attached to a release sheet. This adhesive paper is, for example, paper or film with a pressure-sensitive adhesive layer formed on the back surface. In such a sealing piece, for example, when sealing an opening in a package of sweets, a piece of adhesive paper is peeled off from a release sheet and is stuck to the opening with a pressure-sensitive adhesive layer on the back side. Then, when opening the opening of the package, the pasted adhesive paper will be removed.
Be cut or torn. Therefore, if you look at the cut state of the adhesive paper attached to the package, you can easily tell whether the package has been opened. However, depending on the material of the opening of the package cage and its surface treatment method, such adhesive paper cannot be easily removed on the spot when, for example, a product is displayed on a display shelf in a store. After foreign matter has been mixed into the package, it can be reattached so that it is not obvious that it has been removed, so it is not possible to tell whether the package has been opened or not just by looking at the adhesive paper 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. As described above, a sealing piece in which adhesive paper is temporarily attached to a release sheet has the disadvantage that, when used, the quality of the contents of the package cannot be guaranteed. Therefore, recently, adhesive films that can be seen to be peeled off after being applied have come on the market. FIG. 13 is a sectional view showing such an adhesive film. The adhesive film 10 includes a film 12, and a silicon layer 14 is formed on a part of the back surface of the film 12. Then, metal is deposited on that surface to form a vapor deposited layer 16. Therefore, a part of this vapor deposited layer 16 is a silicon layer 14.
is not directly deposited on the film 12. Furthermore, the vapor deposition layer 16 and the release sheet 17 are temporarily attached with a pressure-sensitive adhesive layer 18. This adhesive film 10 is attached by peeling off the release sheet 17 and pressing the exposed surface of the adhesive layer 18 against an opening (not shown) of the package.
Then, an adhesive film 10 is attached to the opening.
When the film 12 is peeled off, only the part of the vapor deposited layer 16' that was not directly deposited on the film 12 by the silicon layer 14 remains adhered to the opening part with the adhesive layer 18, and the remaining part and the peeled part are separated. Predetermined characters such as "opened" will appear. 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 such an adhesive film 10, since the metal is deposited on the film 12 and the silicon layer 14, the film 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. Furthermore, when the film 12 is peeled off, the surface of the adhesive layer 18 that remains and is exposed on the adhered part of the adhered material becomes sticky and attracts dust at the part where the film 12 is peeled off. However, there were also problems in terms of hygiene. Moreover, the adhesive force of the exposed adhesive layer 18 makes it possible to reattach the film 12, making it impossible to achieve the intended purpose. Therefore, the main purpose of this invention is to provide an adhesive tape that can be peeled off after application and does not require a vapor deposition process. (Means for Solving the Problems) This invention consists of an easily destructible first layer, a second layer laminated on the first layer, and an adhesive layer laminated on the second layer. and a strip-shaped release layer laminated between the first layer and the second layer, with a part removed so that the first layer and the second layer adhere to each other. In this adhesive tape, the force required to separate the first layer from the second layer at the release layer part is a, and the force required to separate the first layer from the second layer at the part where the release layer is missing is The easily destructible adhesive tape satisfies the following formula: a<b<c, where b is the force required to separate the adhesive layer from the adhered material and c is the adhesive force between the adhesive layer and the adhered material. (Function) The adhesive layer gives the adhesive tape the adhesive strength to adhere to the surface of the adhered material or the sealed portion. The second layer retains its initial state when the first layer is removed. The peeling layer is divided into a part where the second layer and the first layer are peeled off and a part where the second layer and the first layer are not easily peeled off. The first layer protects the second layer from cutting or tearing and is easily destroyed by hand. (Effects of the invention) According to this 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 conventional methods. Moreover, there are parts where the second layer and the first layer are temporarily attached through the release layer in a state where re-adhesion is impossible, and parts where the release layer is not present and the first layer and the second layer are If you try to manually peel off a piece of adhesive tape formed into a predetermined shape from the opening of a package, etc., the part where the release layer is present will be separated from the first layer. peels off from the second layer, while in areas where there is no release layer, it does not peel off from the second layer,
It can be seen that the piece of adhesive tape applied to the material to be adhered has been peeled off because the first layer has torn or torn 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 adhesive tape piece stuck to the adhered material has been peeled off, and an adhesive tape can be obtained that does not require the conventional vapor deposition process. 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 this invention. The adhesive tape 10 of this embodiment is used as a seal, etc., and is wound into a roll as shown in FIG. .
Then, on the surface of the surface layer 12 as the first layer,
A release layer 14 is laminated, and on the surface of the release layer 14,
A resin layer 16 as a second layer is laminated, and an adhesive layer 18 is further laminated on the surface of the resin layer 16. A printing layer 2 is provided on the main surface of the surface layer 12.
4 is formed, and further the tape material 10A is bonded to the adhesive layer 18 of the tape material 10B which is wound and overlapped.
A second peeling layer 26 is formed on the surface of the surface layer 12, and is formed in the same manner one after another. Further, a solid printing layer 23 such as silver printing is formed on the main surface of the surface layer 12 on the peeling layer 14 side, and a printing layer 22 is also formed on the surface of the resin layer 16 on the adhesive layer 18 side. Therefore, the printing layer 23 increases the hiding power, making it impossible to see through the printing layer 22 from the surface layer 12 side, and also sealing the surface layer 12 to stabilize the coating film of the release layer 14. Can be done. However, the printing layers 22, 23, and 24 may not be formed. 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-fed type sheets, but also includes roll-up type (web) types.
Of course. The adhesive tape 10 in the form of a long strip is formed with cuts 28 such as perforations at predetermined intervals so that it can be cut into predetermined strips. The surface layer 12 is formed to prevent the resin layer 16 from being cut or torn, and is designed to prevent the surface layer 12 from being peeled off first if the adhesive tape 10 is to be peeled off. It was formed. The surface layer 12 is temporarily attached to the resin layer 16 via the release layer 14, but when the surface layer 12 is peeled off, the release layer 1
4 is not formed, and the part that is directly laminated on the resin layer 16 is left on the resin layer 16 side and can be torn. For example, paper, synthetic resin films such as brittle films made by mixing extender pigments (e.g., titanium white, calcium carbonate) with vinyl chloride and acrylic copolymer resin, or aluminum foil, etc., can be easily made by hand. Examples include sheets that are easily broken and can be easily torn. Also, among them, this adhesive tape 10
When the tape piece 10a obtained by cutting off the tape is bent and attached to the sealed part, a relatively flexible material is used so that the surface layer 12 does not peel off when it tries to restore its original state against the adhesive force of the resin layer 18. good. The peeling layer 14 is formed so that the resin layer 16 and the surface layer 12 can be easily peeled off in a state where they cannot be reattached, and is made of, for example, silicone resin such as UV silicone, fluororesin, The resin layer 16 and the surface layer 1 are coated with a release agent such as wax.
It is formed between 2 and 2. In this embodiment, the release layer 14 is
The release layer 14 is not formed over the entire surface of one main surface of 2, but as shown in FIG. In some areas, the resin layer 16 is adhered to the surface layer 12. In addition to the above example, the shape of the removed portion of the release layer 14 to which no release agent is applied may be, for example, the following shape as shown in FIG. In FIG. 2, dotted portions without the release layer 14 are regularly formed at predetermined intervals on the vertical groove line. In FIG. 2, portions from which the release layer 14 is removed are formed at each intersection of a honeycomb-like line. 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.
It is formed by coating the surface of the release layer 14 with a resin such as PVA, vinyl acetate, acrylic, vinyl chloride, or nylon. Note that another example of the resin layer 16 is a coating made of 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. Examples include a resin layer. The adhesive layer 18 is for giving adhesive force to the tape piece 10a formed into a predetermined shape by the adhesive tape 10, and is made of an adhesive such as a pressure-sensitive adhesive, for example, and is applied to the surface of the resin layer 16. It is formed. In this adhesive tape 10, the force required to peel off the surface layer 12 from the resin layer 16 at the release layer 14 portion is a, and the first layer is replaced with the second layer at the portion where the release layer is missing. b is the force required to separate the adhesive from the adhesive layer 18, and c is the adhesive force with the adhered material when the adhesive layer 18 is adhered to the adhered material such as a package.
In the adhesive tape 10 that is rolled up,
Of the adjacent tape materials 10A and 10B, if the force required to peel off the adhesive layer 18 of the tape material 10B from the second peeling layer 26 of the tape material 10A bonded thereto is d, then the force required for peeling off each part is d. The configuration is such that the required force satisfies the formula d<a<b<c. To use, first, roll adhesive tape 1
0, and after pulling out a predetermined length while peeling it from the adjacent tape material 10A, cut it into a predetermined tape 10a at a cut 28 such as a perforation,
Using the adhesive layer 18, it can be attached, for example, to the opening of a candy package or as a price tag, as shown in FIG. 11a. Also, Figure 11b
When the opening of the lid of a can or bottle is to be completely sealed, as shown in FIGS. 2 and 2c, the cuts 28 such as perforations are not necessary and it is preferable to use a series of adhesive tapes. In order to open the opening of the package to which the tape piece 10a made of the surface layer 12, the resin layer 16, etc. is stuck, it is necessary to peel off the stuck tape piece 10a and open the sealed part. In this case, a portion 12c where the surface layer 12 is weakly temporarily attached to the resin layer 16 via the release layer 14.
and a part 12b which is strongly adhered compared to the former part (part of the release layer 14) because the release layer 14 is not formed; 18, so if you try to peel off the tape piece 10a, you can only peel off the surface layer 12c where the release layer 14 is present, as shown in FIG. The surface layer 12b remains attached to the sealed portion together with the resin layer 16 by the adhesive layer 18. Therefore, once the surface layer 12 is peeled off, the surface layer 12c is torn off and the printed layer 22 is removed through the resin layer 16.
The characters such as "opened" can be seen through the line, and the surface layer 12c cannot be reattached to the surface of the resin layer 16, and the original state cannot be restored, so it is obvious that the package has been opened. 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 12
Even if the resin layer 16 is cut or torn at the same time as the package is peeled off, the opened state can be determined by looking at the state of the resin layer 16 in the same manner as described above. In this example, the tape piece 10a was used for the package of sweets, but it can also be used for sealing parts such as medicine packages, envelopes, bags, etc., and as a price tag displaying the price. Of course. Hereinafter, in order to make the embodiments of this invention even clearer, the embodiments will be explained in more detail according to an example of the manufacturing method of the tape material according to this invention. FIGS. 3 and 4 are illustrative views showing an example of an apparatus for manufacturing a laminate used in an embodiment of this invention. This laminate 30 has a release layer 14 and a resin layer 16 laminated in that order on the surface layer 12. The apparatus 100 includes a holding roller 102 for holding the surface material 12a forming the strip-shaped surface layer 12 in a roll shape. One end of the surface material 12a 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 14a such as silicone resin or fluorine resin to one surface of the surface material 12a, and includes two rollers 104a and 104b. The lower part of the roller 104a is a pan 104c.
It is immersed in a release agent 14a stored in the water. Therefore, by rotating rollers 104a and 104b, the surface material 2 guided between them
A release agent 14a is printed and coated on the surface of 0a.
Note that as the release agent coating device 104, a coating device such as a gravure roll coater, a reverse roll coater, an air knife coater, etc. may be used.
Also, known printing machines such as offset printing machines and screen printing machines may be used. The release agent 14a is applied, for example, in strips at intervals, as shown in FIG.
Parts coated with the release agent 14a and parts not coated are formed alternately. Then, the surface material 12a to which the release agent 14a is printed and coated is heated, for example, by a dryer 10 including a heater.
6. In the dryer 106, the surface material 1
The release agent 14a printed and coated on 2a is dried to form a release layer 14. The surface material 12a on which the release layer 14 has been formed in this manner is guided to the winding device 108. Next, the roll-shaped surface material 12a wound on the winding device 108 is loaded onto the holding roller 102 of the release agent coating device 104 again. and,
In the same manner as described above, a release agent having a lighter release force than that of the release layer 14 is applied to the main surface of the surface layer 12 opposite to the release layer 14 surface to form a second release layer. Form 26. In this way, in this embodiment, the peeling force is made different on both main surfaces of the surface material 12a. That is, the release layer 14 has a heavier release force than the second release layer 26, but this may be achieved by, for example, varying the release force by using different release agent components, or
Alternatively, make a difference by changing the amount of release agent applied. Then, the second peeling layer 26 is further formed, and the rolled surface material 12a is loaded into another resin 16a laminating apparatus 110 shown in FIG. 4. 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 layer 14 of the surface material 12a guided between them. Then, the surface material 1 coated with the resin 16a
2a is further led to a dryer 120, where it is dried and solidified. As a result, the resin 16a is coated on the surface of the release layer 14 on the surface of the surface layer 12, and a laminate 30 in which the resin layer 16 is formed is formed. This laminate 30 is then sent to the next printing device 130. The printing device 130 is
For example, it consists of a known printing machine such as an offset printing machine, and is installed on the transport path of the stack 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. In addition, for example, the surface of the material to be adhered to, such as a package cage, can be marked with "opened" marks.
The printed layer 22 can be formed by printing predetermined lines, such as, and making it possible to see through the resin layer 16 when the surface layer 12 is peeled off. You don't have to. Next, the laminate 30 is guided to a score forming device 136 that forms cuts 28, such as perforations for cutting. The cuts 28 are formed to divide a large number of identical arrays, and are intended to facilitate dividing the adhesive tape 10 one by one. The cut forming device 136 has a cutting blade having a shape corresponding to the shape of the cut 28. As the score forming device 136, a device including a cutting blade roller or the like may be used. Of course, in the case of a tape material in which no cuts 28 are formed, the cuts 28 do not need to be formed by the score forming device 136. The laminate 30 on which the printed layer 22 has been formed in this way is wound up into a roll shape and held by a take-up roller 140. In FIG. 5, using the laminate 30 shown in FIG.
It is an illustrative view showing an example of a device for further laminating an adhesive layer 18. Apparatus 150 includes a coating device 152 . The coating device 152 is for coating the adhesive 18a on the surface of the resin layer 16 of the laminate 30, and includes a main roller 154 and a main roller 154.
It includes a roller 156 provided opposite to. The main roller 154 has a pan 158 at its lower part.
The main roller 154 applies the adhesive 18a to the surface of the resin layer 16 of the laminate 30, which is immersed in the adhesive 18a stored in the resin layer 18a and is sandwiched between the main roller 154 and the roller 156. Then, the laminate 30 printed with the adhesive 18a is led to a dryer 122 including, for example, a heater. In the dryer 122, the adhesive 18a printed and coated on the laminate 30 is dried to form an adhesive layer 18.
is formed as. Then, the adhesive tape 10 formed by laminating the adhesive layer 18 and the laminate 30 is guided to a take-up roller 160. In the embodiment described above, before forming the second release layer 26, a printed layer 24 is formed by printing appropriate lines such as "product name" on the surface of the surface layer 12. However, these printed layers 22, 23,
24 may be formed alone or as a combination of two or more layers, or may not be formed at all. Note that the solid printing machine 23 is connected to the peeling layer 1 of the surface layer 12.
Of course, when forming on the fourth main surface, it is necessary to print before forming the release layer 14. Here, a more specific example will be described as follows. (1) As the first layer, a brittle film made by Nippon Carbide Industries Co., Ltd. whose main component is a copolymer resin of vinyl chloride and acrylic with a thickness of about 5 to 100 μm is used, and as a release agent to form the release layer 14, Toray Industries Co., Ltd. After coating the entire surface of the high-quality paper with a hardening agent using the company's silicone resin in a polka dot pattern, leaving the uncoated areas,
A release layer is formed by baking with a dryer. Then again, as a release agent for forming the second release layer 26, a silicone resin manufactured by Toray Industries, Inc. (coating amount: solid content) whose release force is lighter than the silicone resin is used again.
0.3 to 2 g/m ² ), coated with a hardening agent, and then baked with a dryer to form a second
A release layer 26 is formed. Next, a second layer is formed on this release layer 14 according to Table 1 below.
A hot melt mainly composed of EVA resin is coated to a thickness of approximately 5 to 50 μm.
At this time, the force (a) required to peel off the EVA resin layer from the release layer is 100 g, and the force (b) required to peel off the EVA resin from the brittle film in the area where the release layer 14 is not formed is 500 g. It was hot. The thus-prepared laminate of the first and second layers was coated with an acrylic adhesive (BPS-5127, manufactured by Toyo Ink) to a dry film thickness of 5 to 50 μm. Thereafter, the laminate was rolled up into a roll. At this time, the force (d) required to peel off the adhesive tape 10 from the inner adhesive tape 10 that has been wound over the adhesive layer is 10 g.
It was hot. The adhesive tape thus constructed was cut into small pieces and pasted onto a material to be pasted (paper box, plastic, glass bottle, etc.). At this time, the adhesive strength (b) to the adhered material was 1000 g. When I tried to forcefully peel off the attached tape piece from the material to which it was attached, the brittle film of the first layer was peeled off at the release layer 14, and it was removed from the area where the release layer 14 was not formed. It was left on the surface of the EVA resin layer and was torn.

【table】

[Table] Similar results were also obtained when a urethane resin manufactured by Takeda Pharmaceutical Co., Ltd. was coated as the second layer and the other conditions were the same as in the above example. (2) Using coated paper with a thickness of about 70 μm as the first layer, wax was applied as a release agent to form a release layer and dried, leaving a striped area where the release layer was missing. Next, a second layer of urethane resin or EVA is formed on top of this wax.
Coat with resin or the like to a thickness of approximately 5 to 50 μm. At this time, urethane resin or EVA
The force (a) required to peel the resin from the wax surface is
The force (b) required to peel off the coated paper from the resin layer in the area where the release agent layer was not formed was 500 g. A laminate of the coated paper and the second layer created in this way is coated with an adhesive manufactured by Toyo Ink Co., Ltd. to a dry film thickness of 5 to 500 ml.
It was coated to a thickness of 50μ. Thereafter, the laminate was rolled into a roll, and the force (d) required to peel off the adhesive portion from the second release layer was 20 g. The thus constructed adhesive tape is cut into small pieces to be applied to the material to be adhered to (paper boxes, paper boxes, etc.).
(plastic, glass bottle, etc.).
At this time, the adhesive strength (c) to the adhered material was 1000 g. When I tried to forcefully peel off the pasted tape piece from the material to which it was pasted, the coated paper of the first layer was peeled off at the release layer 14 portion, and the release layer 14 was not formed. In some areas, the coated paper was left on the surface of the resin layer and torn. FIG. 7 is a sectional view showing another embodiment of this invention. In particular, the adhesive tape 10 of this embodiment is different from the embodiment shown in FIG. 1 in that the resin layer 16 forming the second layer is not formed by coating the release layer 14; With the adhesive strength of the adhesive layer 16b formed on the main surface of the release layer 1
4 and are glued together. The resin layer 16 is formed with a film made of a resin such as polyethylene, polypropylene, polystyrene, urethane, etc., and the adhesive layer 16b is formed with an adhesive 16b' having a weaker adhesive force than the adhesive layer 18. It is. FIG. 6 shows the surface layer 12 shown in FIG. 7, using the laminated material 32 of the surface layer 12 shown in FIGS.
Laminate 30 consisting of release layer 14 and resin layer 16
It is an illustrative view showing an example of the apparatus for manufacturing. In this apparatus, unlike the apparatus shown in FIG. 4, a film 16' is laminated and laminated on the surface of the release layer 14 on the surface of the surface layer 12, instead of the lamination apparatus 110 that coats the resin 16a. A device 110' is provided. The laminating device 110' applies the adhesive 16b' to the laminated body 3.
a device 117 for coating the surface of the release layer 14 of 0;
It includes a device 118 for loading a roll of film 16'. The adhesive application device 117 is
Pan 11 for storing roller 112' and adhesive 16b'
After applying adhesive 16b' to the surface of the peeling layer 14 of the laminated material 32 drawn out and guided from the supply device, as the roller 112' rotates, the adhesive 16b' is applied to the surface of the peeling layer 14 of the laminated material 32 including the adhesive 6', and is then separately applied by the device 118 for loading the rolled body. The guided film 16' is overlapped and adhered to the surface of the adhesive 16b'. The laminate 30 in which the film 16' is thus laminated on the surface of the release layer 14 of the laminate 32 via the adhesive layer 16b is guided to the adhesive device 119. As the adhesive device, PVA type,
When using adhesives containing water-soluble resins such as vinyl acetate or acrylic, or solvent-based adhesives made of salt vinyl acetate, urethane, acrylic, etc., use a dryer.
When using rubber-based or EVA-based hot melt adhesives, use a "cooler". In this way, the films 16' are superimposed and the second
A laminate 30 in which a resin layer 16 is formed.
Next, it is guided to a score forming device 136 that forms perforations for cutting. The cuts 28 are formed to divide a large number of identical arrays, making it easier to separate the adhesive tape 10 one by one. Laminated body 30 with cuts 28 formed in this way
is guided to the printing device 130, and the printing device 13 prints an appropriate line such as “opened” on the surface of the resin layer 16.
0 and is wound up on the winding roller 140. Then, the winding roller 14
The laminated body 30, which has been rolled up in a single layer, is loaded into the adhesive 18a application device 158 shown in FIG. An adhesive layer 18 is formed. Note that the adhesive 18a forming the adhesive layer 18 at this time may be a pressure-sensitive adhesive similar to that in the above embodiment, but a sheet type adhesive as shown in FIG. 8 may be used. When forming the tape 10,
Pressure-sensitive adhesives tend to adhere inadvertently, so a rewetting adhesive that quickly dissolves when exposed to water and exhibits strong adhesive strength may be applied. As this rewetting type adhesive, for example, a starch-based adhesive such as water-soluble polyethylene, PVA (PVA), or starch glue is used. In addition, in the case of such a single-wafer type (sheet-like) adhesive tape 10, the seventh
Unlike the adhesive tape 10 shown in the figure,
Without forming the second release layer 26 on the surface of the surface layer 12, lines such as "product name" and "price" are appropriately printed on the surface of the surface layer 12 as shown in FIG. A printed layer 24a may also be formed. In addition, as shown in FIG.
8b, the wide sheet-like adhesive tape 10 may be divided into predetermined sizes and separated at the cuts 28a and 28b to form tape pieces 10a of appropriate sizes. Further, as the adhesive 18a forming the adhesive layer 18, a heat-sensitive type adhesive may be used, which has no tackiness on the surface at room temperature, but becomes activated and develops tackiness when heated. As a heat-sensitive adhesive,
Heating activates the adhesive. For example, an adhesive based on a hot-melt resin such as polyethylene that has adhesive properties and adheres when cooled may be used. When applying such an adhesive to the surface of the resin layer 16, which is the second layer of the laminate 30, for example, a coating device as shown in FIG. 9 that applies the adhesive while heating it to an appropriate temperature is used. The adhesive layer 18 is formed by drying the adhesive 18a by introducing the laminate 30 onto which the adhesive 18a has been printed and applied to the dryer 124 including a device for blowing cold air.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention. FIG. 2 is a plan view showing a state in which a release layer is formed. FIGS. 3 and 4 are illustrative views showing an example of an apparatus for manufacturing a laminate used in an embodiment of this invention. FIG. 5 shows an example in which the laminate 30 shown in FIG.
FIG. FIG. 6 is an illustrative view showing an example of an apparatus for manufacturing the adhesive tape 10 shown in FIG. 7 using the laminated material 32 shown in FIG. 4. Figure 7 shows
FIG. 3 is a sectional view showing another embodiment of the invention. 8th
The figure is a perspective view showing another embodiment of this invention. FIG. 9 is an illustrative view showing another apparatus for laminating the adhesive layer 18. FIG. 10 is a perspective view showing an embodiment of this invention. Figure 11a,
b and c are perspective views showing how to use the adhesive tape according to this invention. FIG. 12 is a sectional view showing a state in which the first layer of the embodiment of FIG. 1 is destroyed. FIG. 13 is a sectional view showing a conventional example. In the figure, 10 is an adhesive tape, 10A is a tape material, 10B is a tape material, 10a is a tape piece, 1
2 is a surface layer, 14 is a release layer, 14a is a release agent, 1
6 is a resin layer, 16' is a film, 18 is an adhesive layer,
18a is an adhesive, 22 is a printing layer, 23 is a printing layer,
24 is a printing layer, 26 is a second release layer, 30 is a laminate, 102 is a holding roller, 104 is a release agent coating device, 104a, 104b are rollers, 104c is a pan, 106 is a dryer, 108 is a winding device, 110, 110' is a laminating device, 120 is a dryer, 122 is a drying device, 130, 132 is a printing device, 136 is a score forming device, 140 is a winding roller, 150 is a device, 152 is a coating device, 1
54 is a main roller, 156 is a roller, 158 is a pan, 160 is a take-up roller, 162 is a holding roller, 164 and 166 are rollers, and 168 is a take-up roller.

Claims (1)

[Claims for Utility Model Registration] 1. an easily breakable first layer; a second layer laminated on the first layer; an adhesive layer laminated on the second layer; A portion is removed between the first layer and the second layer so that the first layer and the second layer adhere to each other,
A belt-shaped adhesive tape including laminated release layers, where a is the force required to separate the first layer from the second layer at the release layer, and a is the force required to separate the first layer from the second layer at the release layer, and a is the force required at the release layer where the release layer is removed. When the force required to separate the first layer from the second layer is b, and the adhesive force between the adhesive layer and the material to be adhered is c, it is easy to use a material that satisfies the following formula a<b<c. Destructible adhesive tape. 2. The easily destructible adhesive tape according to claim 1 of the utility model registration claim, wherein the adhesive tape includes one rolled up into a roll. 3. The first layer includes a second release layer formed on a surface opposite to the surface on which the release layer is formed, and the first layer is separated from the second layer by the release layer. Let a be the force required to peel off the first layer from the second layer at the part where the release layer is missing, b be the force required to peel off the first layer from the second layer, and c be the adhesive force between the adhesive layer and the adhered material. When the force required to peel off the adhesive layer and the second release layer of the first layer joined when rolled into a roll is d, the following formula d<a<b<c The easily breakable adhesive tape according to claim 2 of the utility model registration, which satisfies the following. 4. The easily breakable adhesive tape according to claim 1, wherein the adhesive tape includes a sheet-like adhesive tape. 5. The easily destructible adhesive tape according to any one of claims 1 to 4, wherein the first layer includes paper. 6. The easily broken adhesive tape according to any one of claims 1 to 4, wherein the first layer includes a easily broken synthetic resin film. 7. The easily breakable adhesive tape according to claim 6, wherein the first layer includes a film whose main component is a copolymer resin of vinyl chloride and acrylic. 8 The second layer includes a resin layer coated with synthetic resin, as claimed in Claim 1 of Utility Model Registration.
The easily destructible adhesive tape according to any one of Items 7 to 7. 9. The easily breakable adhesive tape according to claim 8, wherein the second layer includes a resin layer coated with urethane resin. 10. The breakable adhesive tape according to claim 8, wherein the second layer includes a resin layer coated with EVA resin. 11. The easily breakable adhesive tape according to any one of claims 1 to 7, wherein the second layer includes a synthetic resin layer formed by overlapping synthetic resin films. 12. The easily destructible adhesive tape according to any one of claims 1 to 11, wherein the release layer includes a layer coated with silicone resin. 13. The easily destructible adhesive tape according to any one of claims 1 to 11, wherein the release layer includes a layer coated with a soft resin. 14. The breakable adhesive tape according to any one of claims 1 to 11, wherein the release layer includes a layer coated with wax. 15 The portion from which the release layer is removed is formed in a linear shape.
The easily destructible adhesive tape according to any of paragraph 14. 16 The portion from which the release layer is removed is formed in a dot shape, as defined in the claims 1 to 3 of the claims for utility model registration.
The easily destructible adhesive tape according to any of paragraph 14. 17. The easily destructible adhesive tape according to any one of claims 1 to 14, wherein the portion lacking the release layer is formed in a geometric pattern. 18. The easily breakable adhesive tape according to any one of claims 1 to 17, wherein the adhesive layer includes an adhesive layer coated with a pressure-sensitive adhesive. 19 The adhesive layer includes an adhesive layer coated with a rewetting type adhesive.
The easily destructible adhesive tape according to any one of Items 1 to 17. 20 Utility model registration claim 1, wherein the adhesive layer includes an adhesive layer coated with a heat-sensitive adhesive.
The easily destructible adhesive tape according to any one of Items 1 to 17. 21. The easily breakable adhesive tape according to claim 20, wherein the heat-sensitive adhesive layer includes an adhesive layer mainly composed of a heat-melting resin. 22. The easily broken adhesive tape according to any one of claims 1 to 21, wherein the first layer includes a printed layer formed on its main surface. 23. The easily breakable adhesive tape according to claim 22, wherein the first layer includes a solid printing layer formed on the main surface on the second layer side. 24. The easily broken adhesive tape according to any one of claims 1 to 23, wherein the second layer includes a printed layer formed on its main surface.