Method for adhering and peeling objects, and object adhering and peeling apparatus

Abstract

To provide an object adhesion / peeling method and an object adhesion / peeling device with which an adhesion target object is temporarily adhered to a fixation target object and the fixation target object can be peeled off without any residue.SOLUTION: An object adhesion / peeling device according to an embodiment has an adhesive sheet, a first electrode, a second electrode, and a power supply unit. The adhesive sheet has adhesive faces on one face side to be adhered to a fixation target surface and on the other face side to be adhered to an adhesion target object. The first electrode is arranged on the one face side of the adhesive sheet. The second electrode is arranged on the one face side of the adhesive sheet adjacent to the first electrode. The power supply unit inputs predetermined voltages to the first and second electrodes and by applying a potential difference between the first and second electrodes, makes the adhesive sheet generate a potential difference based on the predetermined voltage on the one face side thereof in a direction orthogonal to a layer thickness direction, makes the adhesive sheet generate an electrochemical reaction thereon, and makes the adhesive sheet peeled off from the fixation target surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to a method for adhering and peeling an object and an object adhesion and peeling device.

Background Art

[0002] For example, when temporarily adhering a sensor to concrete, generally an adhesive or double-sided tape is used. However, when peeling the sensor, the adhesive or double-sided tape may remain as a residue on the concrete side. When an article to be adhered is temporarily adhered to a fixing object and then peeled again, it is desirable that no residue such as an adhesive remains on the fixing object.

[0003] In recent years, an adhesive that can be easily peeled from an adherend by applying a voltage has been put into practical use. According to this technique, both the fixing object and the adhering object need to have conductivity, and the applicable range has been limited.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a method for adhering and peeling an object that can temporarily adhere an object to be adhered to a fixing object and peel the fixing object without residue, and an object adhesion and peeling device.

Means for Solving the Problems

[0006] The object adhesion and peeling device of the embodiment includes an adhesive sheet, a first electrode, a second electrode, and a power supply unit. The adhesive sheet has an adhesive surface on one side adhered to the surface to be fixed and on the other side to which the object to be adhered is adhered. The first electrode is disposed on one side of the adhesive sheet. The second electrode is disposed adjacent to the first electrode on one side of the adhesive sheet. The power supply unit inputs a predetermined voltage to the first electrode and the second electrode, and applies a potential difference between the first electrode and the second electrode, thereby generating a potential difference based on the predetermined voltage in a direction orthogonal to the layer thickness direction on one side of the adhesive sheet, causing an electrochemical reaction in the adhesive sheet, and peeling the adhesive sheet from the surface to be fixed.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0008] Hereinafter, the object adhesion and peeling method and the object adhesion and peeling device of the embodiment will be described with reference to the drawings.

[0009] (First Embodiment) As shown in FIG. 1, the object adhesion and peeling device 1 includes an adhesive sheet 4 formed in a sheet shape, a first electrode 2 and a second electrode 3 provided on one surface 4A side of the adhesive sheet 4, and a power supply unit 5 that applies a voltage to the first electrode 2 and the second electrode 3. The adhesive sheet 4 has, for example, adhesive surfaces on one surface 4A side and the other surface 4B side. One surface 4A side of the adhesive sheet 4 is adhered to, for example, a fixed target surface of a fixed object. The fixed object is, for example, concrete. An object to be adhered such as a sensor is adhered to the other surface 4B side of the adhesive sheet 4. The first electrode 2 is disposed on one surface 4A side of the adhesive sheet 4, and the second electrode 3 is disposed adjacent to the first electrode 2. The power supply unit 5 is electrically connected to the first electrode 2 and the second electrode 3.

[0010] The adhesive sheet 4 is formed of, for example, an acrylic polymer adhesive using an imidazolium ionic liquid. The adhesive sheet 4 is formed of, for example, an electrically peelable adhesive layer having predetermined electrical characteristics. The adhesive sheet 4 is formed in a sheet shape using a material including, for example, an acrylic polymer, an ionic liquid contained in the acrylic polymer and exhibiting a predetermined ionic conductivity, and a migration promoter that promotes the migration of the ionic liquid. The adhesive sheet 4 is provided with adhesiveness on one surface 4A side and the other surface 4B side.

[0011] The first electrode 2 has, for example, a plurality of first comb teeth electrodes 2A. The plurality of first comb teeth electrodes 2A are formed of a metal linear body having a predetermined electrode width. The plurality of first comb teeth electrodes 2A are juxtaposed at a predetermined interval. The plurality of first comb teeth electrodes 2A are electrically connected in parallel by a first connection portion 2B. The first connection portion 2B electrically connects the proximal ends of the respective first comb teeth electrodes 2A. The first connection portion 2B is electrically connected to the power supply unit 5.

[0012] The second electrode 3 has, for example, a plurality of second comb-shaped electrodes 3A. The plurality of second comb-shaped electrodes 3A are formed by a linear body made of metal having a predetermined electrode width. The plurality of second comb-shaped electrodes 3A are juxtaposed at a predetermined interval. The plurality of second comb-shaped electrodes 3A are electrically connected in parallel by a second connection portion 3B. The second connection portion 3B electrically connects the proximal ends of the respective second comb-shaped electrodes 3A. The second connection portion 3B is electrically connected to the power supply unit 5.

[0013] The second electrode 3 and the first electrode 2 are arranged in line symmetry such that the comb-shaped electrodes of each other are arranged adjacent to each other. Each first comb-shaped electrode 2A is arranged between the respective second comb-shaped electrodes 3A. That is, each first comb-shaped electrode and each second comb-shaped electrode are arranged adjacent to each other alternately. The respective first comb-shaped electrodes 2A and the respective second comb-shaped electrodes 3A are arranged at a separation distance d of less than 1000 μm, for example. The electrode widths of the respective first comb-shaped electrodes 2A and the respective second comb-shaped electrodes 3A are formed smaller than the separation distance d. It is desirable that the separation distance d is smaller than the layer thickness T of the adhesive sheet 4.

[0014] The power supply unit 5 inputs a predetermined voltage to the first electrode 2 and the second electrode 3 via the first connection portion 2B and the second connection portion 3B. The predetermined voltage is an alternating voltage having a predetermined frequency. The predetermined frequency is desirably, for example, 1000 Hz or less, and preferably 10 Hz or less in order to more surely cause the peeling described later. The power supply unit 5 generates a potential difference based on the predetermined voltage in the surface direction of the adhesive sheet 4 orthogonal to the layer thickness direction (normal direction) of the adhesive sheet 4 by applying a potential difference between the first electrode 2 and the second electrode 3. When an object to be adhered is fixed to the other surface 4B side of the adhesive sheet 4 and one surface 4A side of the adhesive sheet 4 is adhered to the surface to be fixed as described later, the power supply unit 5 causes an electrochemical reaction in the adhesive sheet 4 based on the input of the predetermined voltage, and peels the adhesive sheet 4 from the surface to be fixed.

[0015] The acrylic polymer adhesive using an imidazolium ionic liquid, which is the material of the adhesive sheet 4, is known to be used for electrical peeling on the adhesion surface. For example, when the acrylic polymer adhesive formed in a sheet shape is provided on both sides with the electrodes on the anode side and the cathode side facing each other, a chemical reaction occurs based on the potential difference applied between the two electrodes on the anode side and the cathode side, and it is known that the adhesive force decreases.

[0016] When a potential difference is applied between the two electrodes on the anode side and the cathode side of the adhesive sheet provided with the electrodes, hydrogen bubbles are generated at the cathode side electrode. The generated bubbles significantly reduce the adhesive force by peeling off between the cathode side electrode and the adhesive sheet. The size of the generated bubbles is about 1 μm - 100 μm. In this range, the adhesive force between the electrode and the adhesive sheet 4 decreases.

[0017] FIG. 2 shows the electric field distribution in a part of the cross-section of the object adhesion peeling device 1. The first comb electrode 2A and the second comb electrode 3A are arranged spaced apart in the plane direction (X-axis direction) orthogonal to the normal direction (Z-axis direction) of the adhesive sheet 4 on one surface 4A side of the adhesive sheet 4. Between the first comb electrode 2A and the second comb electrode 3A, it has adhesiveness by the adhesive sheet 4 and can be adhered to the surface to be fixed. Also, the other surface 4B side of the adhesive sheet 4 is also an adhesive surface and can adhere the object to be adhered. The object to be adhered and the surface to be fixed do not necessarily need to have conductivity and may be formed of any of an insulator, a dielectric, a resistor, and a conductor. The first comb electrode 2A and the second comb electrode 3A may be provided in advance on the adhesive sheet 4 side or on the surface to be fixed side.

[0018] When a voltage is applied between the first comb electrode 2A and the second comb electrode 3A, an electric field is generated in a direction (X-axis direction) perpendicular to the layer thickness direction (Z-axis direction) of the adhesive sheet 4. When the first comb electrode 2A becomes the cathode side when an alternating voltage is applied by the power supply unit 5 (see Fig. 2(A)), in the region between the first comb electrode 2A and the second comb electrode 3A, the region adjacent to the first comb electrode 2A becomes a hydrogen generation region R where hydrogen bubbles are generated. When the second comb electrode 3A becomes the cathode side when an alternating voltage is applied by the power supply unit 5 (see Fig. 2(B)), in the region between the first comb electrode 2A and the second comb electrode 3A, the region adjacent to the second comb electrode 3A becomes a hydrogen generation region R where hydrogen bubbles are generated.

[0019] In the hydrogen generation region R, a space is generated due to the generation of hydrogen bubbles, and the adhesive force between the adhesive sheet 4 and the surface to be fixed decreases. Therefore, when an alternating voltage is applied to the first comb electrode 2A and the second comb electrode 3A by the power supply unit 5, on the one surface 4A side of the adhesive sheet 4, the adhesive force in the hydrogen generation region R adjacent to the first comb electrode 2A and the second comb electrode 3A decreases, and the adhesive force on the one surface 4A side of the adhesive sheet 4 decreases. In this case, the adhesive force on the one surface 4A side of the adhesive sheet 4 where the first comb electrode 2A and the second comb electrode 3A are provided relatively decreases compared to the adhesive force on the other surface 4B side, and the one surface 4A side peels off selectively.

[0020] At this time, when the frequency of the alternating voltage input by the power supply unit 5 is increased to a predetermined value or more, the movement of the electrolyte existing in the region between the first comb electrode 2A and the second comb electrode 3A on the one surface 4A side of the adhesive sheet 4 cannot follow. In this state, a sufficient amount of electrolyte cannot reach the first comb electrode 2A or the second comb electrode 3A, the adhesive force on the one surface 4A side of the adhesive sheet 4 does not decrease, and it does not peel off from the surface to be fixed. Therefore, it is desirable that the frequency of the alternating voltage input by the power supply unit 5 is set to 1 kHz or less based on the ionic mobility indicating the amount of movement of the electrolyte existing in the region between the first comb electrode 2A and the second comb electrode 3A. In order to more surely cause peeling at both electrodes, it is preferable that the frequency of the alternating voltage input by the power supply unit 5 is 10 Hz or less.

[0021] FIG. 3 shows the relationship between the electrode width in the short direction and the separation distance between the first comb-tooth electrode 2A and the second comb-tooth electrode 3A. When the electrode width W and the separation distance d in the short direction of the first comb-tooth electrode 2A and the second comb-tooth electrode 3A are considered, sufficient adhesive force can be ensured on the side of one surface 4A of the adhesive sheet 4 when the conditions of the following formula (1) are satisfied. W < d (1)

[0022] Also, when the bubble diameter rb of hydrogen in the hydrogen generation region R adjacent to the first comb-tooth electrode 2A and the second comb-tooth electrode 3A is considered, a good peeling effect can be obtained on the side of one surface 4A of the adhesive sheet 4 when the conditions of the following formula (2) are satisfied. d < 2 × rb (2)

[0023] The separation distance d only needs to be in a range where the effect of reducing the adhesive force can be obtained, and is not necessarily limited to the above relationship. More preferably, it is desirable that the separation distance d satisfies the conditions of the following formula (3). d < 10 × rb (3)

[0024] The bubble diameter rb of hydrogen is desirably approximately 100 μm. Therefore, the condition of the separation distance d can be set in the range of 1000 μm or less, and in order to enhance the peelability more, it is set in the range of 200 μm or less.

[0025] FIG. 4 shows an object adhesion and peeling device 10 according to a comparative example. For the same configurations as those in the above embodiment in the comparative example, the same names are used, and duplicate descriptions are omitted as appropriate. The object adhesion and peeling device 10 according to the comparative example includes an adhesive sheet 40, a first electrode 20, and a second electrode 30. The first electrode 20 is provided on one surface 40A side of the adhesive sheet 40, and the second electrode 30 is provided on the other surface 40B side. The first electrode 20 and the second electrode 30 are electrically connected to a power supply unit 50. In this configuration, the power supply unit 50 inputs a DC predetermined voltage to the first electrode 20 and the second electrode 30. When the first electrode 20 is on the cathode side, in the region between the first electrode 20 and the second electrode 30, the region adjacent to the first electrode 20 becomes a hydrogen generation region R where hydrogen bubbles are generated.

[0026] When the object adhesion and peeling device 10 according to the comparative example is used for fixing between the surface to be fixed and the object to be adhered, at least one of the surface to be fixed and the object to be adhered needs to be formed on a conductor having electrical conductivity. Compared with the object adhesion and peeling device 10 according to the comparative example, according to the object adhesion and peeling device 1 of the embodiment, the surface to be fixed and the object to be adhered do not need to be conductors and may be formed on insulators.

[0027] FIG. 5 shows each step executed in the method for adhering and peeling an object. An object to be adhered is adhered to the other surface 4B side of the adhesive sheet 4 provided with the first electrode 2 and the second electrode 3 on one surface 4A side (step S100). One surface 4A side of the adhesive sheet 4 is adhered to the surface to be fixed (step S102). A predetermined voltage is input to the first electrode 2 and the second electrode 3 to generate a potential difference based on the predetermined voltage in a direction orthogonal to the layer thickness direction of the adhesive sheet 4 (step S104). An electrochemical reaction is caused on one surface 4A side of the adhesive sheet 4, and the adhesive sheet 4 is peeled from the surface to be fixed together with the first electrode 2 and the second electrode 3 (step S106). Steps S100 and S102 may be interchanged.

[0028] As described above, according to the object adhesion and peeling device 1, the object to be adhered can be temporarily adhered to the object to be fixed, and the object to be fixed can be peeled without residue. According to the object adhesion and peeling device 1, since the plurality of first comb teeth electrodes 2A and the plurality of second comb teeth electrodes 3A are alternately arranged on one surface side of the adhesive sheet 4, when a predetermined voltage is input to the plurality of first comb teeth electrodes 2A and the plurality of second comb teeth electrodes 3A, a potential difference based on the predetermined voltage is generated in a direction orthogonal to the layer thickness direction of the adhesive sheet, and an electrochemical reaction is caused on one surface side 4A of the adhesive sheet 4, so that the adhesive sheet 4 can be peeled from the surface to be fixed without leaving residue on the surface to be fixed.

[0029] According to the object adhesion and peeling device 1, the adhesive sheet 4 can be peeled from the surface to be fixed regardless of whether the surface to be fixed is formed of a conductor or an insulator. According to the object adhesion and peeling device, by inputting a predetermined voltage of a predetermined frequency to the first electrode 2 and the second electrode 3, the peelability of the adhesive sheet 4 can be improved. According to the object adhesion and peeling device 1, by setting the predetermined frequency within a range not exceeding a predetermined value based on the ion mobility in the adhesive sheet 4, the peelability of the adhesive sheet 4 can be improved.

[0030] (Second Embodiment) Hereinafter, the object adhesion and peeling device according to the second embodiment will be described. In the following description, for the same configurations as those in the first embodiment, the same names and reference numerals will be used, and duplicate descriptions will be omitted as appropriate.

[0031] As shown in FIG. 6, in the object adhesion and peeling device 1A, a first electrode 2C and a second electrode 3C are provided on one surface 4A side of the adhesive sheet 4. The first electrode 2C has a first spiral electrode 2D in which a metal first linear body is arranged in a spiral shape. The first spiral electrode 2D is formed in a spiral shape wound in a predetermined winding direction. The second electrode 3C has a second spiral electrode 3D in which a metal second linear body is arranged in a spiral shape. The second spiral electrode 3D is formed in a spiral shape wound in the same predetermined winding direction as the first spiral electrode 2D. The first linear body and the second linear body are arranged adjacent to each other alternately. The first linear body and the second linear body are arranged at a separation distance d. A double helix is formed by the first spiral electrode 2D and the second spiral electrode 3D.

[0032] According to the object adhesion and peeling device 1A according to the second embodiment, by inputting an alternating voltage of a predetermined voltage to the first electrode 2C and the second electrode 3C by the power supply unit 5, a potential difference based on the predetermined voltage is generated in the directions (X-axis direction and Y-axis direction) orthogonal to the layer thickness direction of the adhesive sheet 4, an electrochemical reaction is generated on one surface side 4A of the adhesive sheet 4, and the adhesive sheet 4 can be peeled from the surface to be fixed so that no residue remains on the surface to be fixed.

[0033] According to at least one embodiment described above, the object adhesion and peeling device 1 includes an adhesive sheet 4 having an adhesive surface on one surface 4A side adhered to the surface to be fixed and on the other surface 4B side to which the object to be adhered is adhered, a first electrode 2 disposed on the one surface 4A side of the adhesive sheet 4, a second electrode 3 disposed adjacent to the first electrode 2 on one surface side of the adhesive sheet 4, and a power supply unit 5 that inputs a predetermined voltage to the first electrode 2 and the second electrode 3 to provide a potential difference between the first electrode 2 and the second electrode 3, thereby generating a potential difference based on the predetermined voltage in a direction orthogonal to the layer thickness direction on the one surface 4A side of the adhesive sheet 4, causing an electrochemical reaction in the adhesive sheet 4, and peeling the adhesive sheet 4 from the surface to be fixed. By having these components, the object to be adhered can be temporarily adhered to the object to be fixed, and the object to be fixed can be peeled off without residue.

[0034] Although some embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, as well as in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0035] 1, 1A... Object adhesion and peeling device, 2, 2C... First electrode, 2A... First comb-shaped electrode, 2D... First spiral electrode, 3, 3C... Second electrode, 3A... Second comb-shaped electrode, 3D... Second spiral electrode, 4... Adhesive sheet, 5... Power supply unit

Claims

1. An object to be adhered is adhered to the other surface side of an adhesive sheet having adhesive surfaces on one surface side and the other surface side, and having a first electrode and a second electrode disposed adjacent to the first electrode on the one surface side, the one surface side of the adhesive sheet is adhered to a surface to be fixed, a predetermined voltage is applied to the first electrode and the second electrode to generate a potential difference based on the predetermined voltage in a direction orthogonal to the layer thickness direction of the adhesive sheet, an electrochemical reaction is generated on the one surface side of the adhesive sheet, and the adhesive sheet is peeled off from the surface to be fixed, A method for adhering and peeling an object.

2. The method for adhering and peeling an object according to claim 1, wherein the predetermined voltage is an alternating voltage having a predetermined frequency.

3. The predetermined frequency is 1000 Hz or less, The method for adhering and peeling an object according to claim 2.

4. The adhesive sheet is formed of an electropeeling adhesive layer including an acrylic polymer, an ionic liquid contained in the acrylic polymer and exhibiting a predetermined ionic conductivity, and a migration promoter for promoting the migration of the ionic liquid, The method for adhering and peeling an object according to any one of claims 1 to 3.

5. The method for adhering and peeling an object according to any one of claims 1 to 3, wherein the first electrode and the second electrode are arranged at a separation distance of less than 1000 μm.

6. The first electrode and the second electrode are formed of linear bodies having a predetermined electrode width, The method for adhering and peeling an object according to claim 5, wherein the electrode width is formed smaller than the separation distance.

7. The first electrode has a plurality of first comb teeth electrodes that are electrically connected in parallel and juxtaposed, The second electrode has a plurality of second comb teeth electrodes that are electrically connected in parallel and juxtaposed, and each of the first comb teeth electrodes and each of the second comb teeth electrodes are arranged adjacent to each other alternately. The method for adhering and peeling an object according to any one of claims 1 to 6.

8. The first electrode has a first spiral electrode in which a first linear body is arranged in a spiral shape, The second electrode has a second spiral electrode in which a second linear body is arranged in a spiral shape, The first linear body and the second linear body constitute a double helix arranged adjacent to each other alternately. The method for adhering and peeling an object according to any one of claims 1 to 6.

9. An adhesive sheet having adhesive surfaces on one surface side adhered to a surface to be fixed and the other surface side to which an object to be adhered is adhered, a first electrode disposed on the one surface side of the adhesive sheet, A second electrode disposed adjacent to the first electrode on the one surface side of the adhesive sheet; A power supply unit that inputs a predetermined voltage to the first electrode and the second electrode to provide a potential difference between the first electrode and the second electrode, thereby generating a potential difference based on the predetermined voltage in a direction orthogonal to the layer thickness direction on the one surface side of the adhesive sheet, causing an electrochemical reaction in the adhesive sheet, and peeling the adhesive sheet from the surface to be fixed. An object adhesion and peeling device comprising:

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