WO2019172304A1 - 電気剥離型粘着シート、接合体、並びに被着体の接合及び分離方法 - Google Patents

電気剥離型粘着シート、接合体、並びに被着体の接合及び分離方法 Download PDF

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Publication number
WO2019172304A1
WO2019172304A1 PCT/JP2019/008825 JP2019008825W WO2019172304A1 WO 2019172304 A1 WO2019172304 A1 WO 2019172304A1 JP 2019008825 W JP2019008825 W JP 2019008825W WO 2019172304 A1 WO2019172304 A1 WO 2019172304A1
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WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
adherend
adhesive layer
adhesive sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/008825
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English (en)
French (fr)
Japanese (ja)
Inventor
香織 赤松
香 溝端
諒 粟根
平尾　昭
横山　純二
陽介 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
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Nitto Denko Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to EP19764294.5A priority Critical patent/EP3763796B1/en
Priority to KR1020207024822A priority patent/KR20200130264A/ko
Priority to EP25175676.3A priority patent/EP4574425A3/en
Priority to CN201980016859.2A priority patent/CN111819257B/zh
Priority to US16/979,014 priority patent/US11623429B2/en
Publication of WO2019172304A1 publication Critical patent/WO2019172304A1/ja
Anticipated expiration legal-status Critical
Priority to US18/178,670 priority patent/US11964462B2/en
Priority to US18/610,364 priority patent/US12441083B2/en
Priority to US19/334,074 priority patent/US20260014775A1/en
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09J7/29—Laminated material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C—CHEMISTRY; METALLURGY
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    • C—CHEMISTRY; METALLURGY
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    • C—CHEMISTRY; METALLURGY
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Definitions

  • the present invention relates to an electrodetachable pressure-sensitive adhesive sheet, a bonded body of the pressure-sensitive adhesive sheet and an adherend, and a method for bonding and separating the adherend using the pressure-sensitive adhesive sheet.
  • a double-sided pressure-sensitive adhesive sheet having a certain adhesive force and a certain peelability may be used when joining members in an electronic component manufacturing process or the like.
  • a double-sided pressure-sensitive adhesive sheet that realizes adhesive strength and peelability, a pressure-sensitive adhesive sheet comprising an electro-peeling pressure-sensitive adhesive layer made of a pressure-sensitive adhesive composition for peeling by applying a voltage to the adhesive layer ) Is known (Patent Document 1).
  • Such a pressure-sensitive adhesive sheet may consist of only an electro-peeling pressure-sensitive adhesive layer, but is preferably a pressure-sensitive adhesive sheet provided with a base material layer in consideration of handleability and flowability. Further, in order to apply a voltage to the electro-peeling pressure-sensitive adhesive layer, this base material layer needs to have conductivity. For example, when a metal foil is used as the base material, burrs are not generated when the pressure-sensitive adhesive sheet is punched. It tends to occur. If such burrs are present, the metal foil and the adherend may be short-circuited, making it impossible to apply a voltage to the electrodetachable pressure-sensitive adhesive layer.
  • a base material used for the electrodetachable pressure-sensitive adhesive sheet it is preferable to use a current-carrying base material in which a conductive layer such as a metal-deposited thin film is formed on a base material layer such as a PET film.
  • Patent Document 1 in order to improve the workability of voltage application, in the electrodetachable pressure-sensitive adhesive sheet, the base material for energization extends in the surface spreading direction beyond the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer.
  • the structure which has the extension part exposed in this way is disclosed. This configuration makes it easy to realize the electrical connection between the terminals of the voltage application device and the energizing substrate by exposing the energizing substrate usually covered with an insulating adhesive layer.
  • the extension part is unstable because it is not fixed by the adhesive material, and it is in electrical contact with an unintended part during voltage application, and is suitable for an electrodetachable adhesive layer. There is a risk that the voltage cannot be applied.
  • the base material for electricity supply is thin and flexible, the contact with the terminal of the voltage application device tends to be unstable, and the man-hour for the peeling operation is likely to increase. Therefore, there has been a demand for an electric peelable pressure-sensitive adhesive sheet that can produce a joined body that can stably apply a voltage to the electric peelable pressure-sensitive adhesive layer.
  • the present invention has been conceived under such circumstances, and the problem is that it is possible to produce a bonded body that can stably apply a voltage to the electrodetachable pressure-sensitive adhesive layer.
  • An object of the present invention is to provide an electrodetachable pressure-sensitive adhesive sheet. Moreover, the joining body manufactured using such an electrically peelable adhesive sheet, and the bonding
  • the electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention includes a conductive substrate including a conductive layer and a substrate layer, and an electrodetachable adhesive formed on the conductive layer of the conductive substrate.
  • An electrodetachable pressure-sensitive adhesive sheet comprising a first pressure-sensitive adhesive layer made of an agent and a second pressure-sensitive adhesive layer formed on a base material layer of a base material for energization, wherein the first pressure-sensitive adhesive layer and the power supply
  • the energizing base material is electrically connected to the first extending portion extending from the second adhesive layer in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet and the first extending portion.
  • a second extension portion extending and extending from the first pressure-sensitive adhesive layer in the surface spreading direction of the peelable pressure-sensitive adhesive sheet.
  • the joined body which concerns on the 1st Embodiment of this invention is equipped with the electrodetachable adhesive sheet which concerns on the 1st Embodiment of this invention, a 1st to-be-adhered body, and a 2nd to-be-adhered body.
  • the first extending portion of the electrodetachable pressure-sensitive adhesive sheet is folded in the direction of the second pressure-sensitive adhesive layer, and the first adherend is folded back of the first pressure-sensitive adhesive layer.
  • the second adherend is adhered to the electro-peelable adhesive sheet by the part that has not been removed, and the second adherend is made of the electro-peelable adhesive by the second adhesive layer and the folded part of the first adhesive layer. Affixed to the sheet and in contact with the conductive layer in the second extension.
  • the first extending portion of the electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention is used as the second pressure-sensitive adhesive. Fold in the direction of the layer, stick the first adherend to the unfolded portion of the first pressure-sensitive adhesive layer, and place the second pressure-sensitive adhesive layer and the first pressure-sensitive adhesive layer on the folded-back portion. After adhering the two adherends and joining the first adherend and the second adherend, a voltage is applied so as to generate a potential difference in the thickness direction of the first adhesive layer, The first adherend and the second adherend are separated.
  • the electrodetachable pressure-sensitive adhesive sheet according to the second embodiment of the present invention includes a conductive substrate including a conductive layer and a substrate layer, and an electrodetachable adhesive formed on the conductive layer of the conductive substrate.
  • An electrodetachable pressure-sensitive adhesive sheet comprising a first pressure-sensitive adhesive layer made of an agent and a second pressure-sensitive adhesive layer formed on a base material layer of a base material for energization, wherein the second pressure-sensitive adhesive layer and the power supply
  • the base material for use has an extending portion that extends and extends beyond the first pressure-sensitive adhesive layer in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet.
  • the joined body which concerns on the 2nd Embodiment of this invention is equipped with the electrodetachable adhesive sheet which concerns on the 2nd Embodiment of this invention, a 1st adherend, and a 2nd adherend. It is a joined body, and the second adherend is adhered to the electrodetachable adhesive sheet by the second adhesive layer, and the electrodetachable adhesive sheet is attached to the end of the second adherend.
  • the second adherend is folded so as to sandwich the second adherend, and at least a part of the extended portion is opposite to the first adherend of the second adherend by the second adhesive layer.
  • the first adherend is stuck to the electrodetachable pressure-sensitive adhesive sheet by the unfolded portion of the first pressure-sensitive adhesive layer.
  • the bonding and separating method for adherends according to the second embodiment of the present invention is the same as the electrodetachable pressure-sensitive adhesive sheet according to the second embodiment of the present invention along the end of the second adherend.
  • the second adherend is folded so as to sandwich the second adherend, and the second adhesive layer is attached to the second adherend, and the unfolded portion of the first adhesive layer is the first adherend.
  • the first adherend is attached to the surface of the second adherend opposite to the first adherend by the second pressure-sensitive adhesive layer.
  • a voltage is applied to the first pressure-sensitive adhesive layer so as to generate a potential difference in the thickness direction, and the first and second adherends are applied. Separate the body.
  • the electrodetachable pressure-sensitive adhesive sheet of the present invention it is possible to provide a joined body that can stably perform electrodetachment.
  • the bonded body of the present invention can stably perform electrical peeling.
  • the method for bonding and separating adherends of the present invention it is possible to stably perform electrodetachment.
  • FIG. 1 is a schematic view of an electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention.
  • Fig. 2 (a) is a perspective view of an example of the electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention
  • Fig. 2 (b) is another view of the electro-peelable pressure-sensitive adhesive sheet according to the first embodiment of the present invention.
  • FIG. 3 is an exploded view of the joined body according to the first embodiment of the present invention.
  • FIG. 4 is an enlarged view of a dotted line portion of FIG.
  • FIG. 5 is an enlarged view of a dotted line portion in FIG. 2 in a modification of the first embodiment of the present invention.
  • FIG. 1 is a schematic view of an electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention.
  • Fig. 2 (a) is a perspective view of an example of the electrodetachable pressure-sensitive adhesive sheet according to the first embodiment of the present invention
  • FIG. 6 is a schematic view of the bonded body according to the first embodiment of the present invention at the time of electrodetachment.
  • FIG. 7 is a schematic view of an electrodetachable pressure-sensitive adhesive sheet according to the second embodiment of the present invention.
  • FIG. 8 is a schematic view of a joined body according to the second embodiment of the present invention.
  • FIG. 9 is an enlarged view of a dotted line portion of FIG.
  • FIG. 10 is an enlarged view of a dotted line portion of FIG. 8 in a modification of the second embodiment of the present invention.
  • FIG. 11 is a schematic view when the bonded body according to the second embodiment of the present invention is electrodetached.
  • FIG. 1 is a schematic view of an electrodetachable pressure-sensitive adhesive sheet 10 (hereinafter also simply referred to as “pressure-sensitive adhesive sheet 10 of this embodiment” or “pressure-sensitive adhesive sheet 10”) according to the first embodiment of the present invention.
  • the pressure-sensitive adhesive sheet 10 of the present embodiment includes a first base material 12 including a conductive substrate 12 including a conductive layer 12a and a base material layer 12b, and an electrical peeling adhesive formed on the conductive layer 12a of the conductive substrate 12.
  • the base material 12 has a second extending portion 15 that extends and extends from the first pressure-sensitive adhesive layer 11 in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet 10.
  • the first pressure-sensitive adhesive layer 11 is a pressure-sensitive adhesive layer made of an electric peeling pressure-sensitive adhesive, and contains a polymer as an adhesive and an electrolyte.
  • the polymer contained in the first pressure-sensitive adhesive layer 11 examples include acrylic polymers, rubber polymers, vinyl alkyl ether polymers, silicon polymers, polyester polymers, polyamide polymers, urethane polymers, and fluorine polymers. And epoxy-based polymers.
  • the 1st adhesive layer 11 may contain only one type of polymer, and may contain two or more types of polymers. From the viewpoint of cost reduction and high productivity, it is preferable to contain an acrylic polymer.
  • the acrylic polymer is a polymer containing monomer units derived from an acrylic acid alkyl ester and / or a methacrylic acid alkyl ester as a main monomer unit having the largest mass ratio.
  • (meth) acryl means “acryl” and / or “methacryl”.
  • the acrylic polymer preferably contains a monomer unit derived from a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 14 carbon atoms.
  • the (meth) acrylic acid alkyl ester include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, sec-butyl (meth) ) Acrylate, 1,3-dimethylbutyl acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, heptyl (meth) acrylate, n-octyl (meth) Acrylate, isooctyl (meth)
  • one type of (meth) acrylic acid alkyl ester may be used, or two or more types of (meth) acrylic acid alkyl ester may be used.
  • the ratio of the monomer unit derived from the (meth) acrylic acid alkyl ester having an alkyl group having 1 to 14 carbon atoms is from the viewpoint of realizing a high adhesive force with respect to the first pressure-sensitive adhesive layer 11.
  • it is 50 mass% or more, More preferably, it is 60 mass% or more, More preferably, it is 70 mass% or more, More preferably, it is 80 mass% or more.
  • the ratio of the alkyl (meth) acrylate having an alkyl group having 1 to 14 carbon atoms in the total amount of the raw material monomers for forming the acrylic polymer realizes high adhesive strength for the first pressure-sensitive adhesive layer 11. From the viewpoint of doing, it is preferably 50% by mass or more, more preferably 60% by mass or more, more preferably 70% by mass or more, and more preferably 80% by mass or more.
  • the acrylic polymer is a monomer unit derived from a polar group-containing monomer from the viewpoint of realizing a high adhesive force with respect to the first pressure-sensitive adhesive layer 11. It is preferable to contain.
  • the polar group-containing monomer include a carboxyl group-containing monomer, a hydroxyl group-containing monomer, and a vinyl group-containing monomer.
  • carboxyl group-containing monomer examples include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, carboxyethyl (meth) acrylate, and carboxypentyl (meth) acrylate. Of these, acrylic acid and methacrylic acid are preferred. Moreover, one type of carboxyl group-containing monomer may be used, or two or more types of carboxyl group-containing monomers may be used.
  • hydroxyl group-containing monomer examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meta ) Acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl acrylate, N-methylol (meth) acrylamide, vinyl alcohol, allyl alcohol, 2-hydroxy Examples include ethyl vinyl ether, 4-hydroxybutyl vinyl ether, and diethylene glycol monovinyl ether. Of these, 2-hydroxyethyl (meth) acrylate is preferred. Moreover, one type of hydroxyl group-containing monomer may be used, or two or more types of hydroxyl group-containing monomers may be used.
  • vinyl group-containing monomer examples include vinyl acetate, vinyl propionate, and vinyl laurate. Of these, vinyl acetate is preferred.
  • One type of vinyl group-containing monomer may be used, or two or more types of vinyl group-containing monomers may be used.
  • the ratio of the monomer unit derived from the polar group-containing monomer in the acrylic polymer is such that the cohesive force is secured in the first pressure-sensitive adhesive layer 11 and the surface of the adherend after peeling off the first pressure-sensitive adhesive layer 11.
  • the content is preferably 0.1% by mass or more. That is, the ratio of the polar group-containing monomer in the total amount of raw material monomers for forming the acrylic polymer is preferably 0.1% by mass or more from the viewpoint of securing cohesive force and preventing adhesive residue.
  • the ratio of the monomer unit derived from the polar group-containing monomer is a characteristic attributed to the monomer unit derived from the above (meth) acrylic acid alkyl ester having an alkyl group having 1 to 14 carbon atoms. Is preferably 30% by mass or less from the viewpoint of appropriately expressing in the acrylic polymer. That is, the ratio of the polar group-containing monomer in the total amount of the raw material monomers for forming the acrylic polymer is preferably 30% by mass or less from the viewpoint of manifesting the characteristics.
  • the method for obtaining the acrylic polymer by polymerizing the above monomers is not particularly limited, and a known method can be used.
  • Examples of the polymerization method include solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization. Is mentioned.
  • the content of the polymer in the first pressure-sensitive adhesive layer 11 is preferably 70% by mass or more, more preferably 80% by mass or more, more preferably, from the viewpoint of realizing sufficient adhesive force in the first pressure-sensitive adhesive layer 11. Is 85% by mass or more, more preferably 90% by mass or more.
  • the electrolyte contained in the first pressure-sensitive adhesive layer 11 is a substance that can be ionized into anions and cations.
  • Examples of such electrolytes include ionic liquids, alkali metal salts, and alkaline earth metal salts.
  • the electrolyte contained in the first pressure-sensitive adhesive layer 11 is preferably an ionic liquid.
  • the ionic liquid is a salt which is liquid at room temperature (about 25 ° C.) and contains an anion and a cation.
  • the anions of the ionic liquid are (FSO 2 ) 2 N ⁇ , (CF 3 SO 2 ) 2 N ⁇ , (CF 3 CF 2 SO 2 ) 2 N ⁇ , (CF 3 SO 2 ) 3 C ⁇ , Br ⁇ , AlCl 4 ⁇ , Al 2 Cl 7 ⁇ , NO 3 ⁇ , BF 4 ⁇ , PF 6 ⁇ , CH 3 COO ⁇ , CF 3 COO ⁇ , CF 3 CF Containing at least one selected from the group consisting of 2 CF 2 COO ⁇ , CF 3 SO 3 ⁇ , CF 3 (CF 2 ) 3 SO 3 ⁇ , AsF 6 ⁇ , SbF 6 ⁇ and F (HF) n ⁇ Is preferred.
  • the cation of the ionic liquid contains at least one selected from the group consisting of an imidazolium cation, a pyridinium cation, a pyrrolidinium cation, and an ammonium cation. It is preferable to do.
  • imidazolium-based cation examples include 1-methylimidazolium cation, 1-ethyl-3-methylimidazolium cation, 1-propyl-3-methylimidazolium cation, 1-butyl-3-methylimidazolium cation, 1 -Pentyl-3-methylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-heptyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-nonyl-3- Methyl imidazolium cation, 1-undecyl-3-methyl imidazolium cation, 1-dodecyl-3-methyl imidazolium cation, 1-tridecyl-3-methyl imidazolium cation, 1-tetradecyl-3-methyl imidazolium cation, 1 -Penta Sil-3-methylimidazolium c
  • pyridinium cation examples include 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-butyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, and 1-octyl-4-methylpyridinium cation. Is mentioned.
  • Examples of the pyrrolidinium cation include 1-ethyl-1-methylpyrrolidinium cation and 1-butyl-1-methylpyrrolidinium cation. *
  • ammonium-based cation examples include a tetraethylammonium cation, a tetrabutylammonium cation, a methyltrioctylammonium cation, a tetradecitrihexylammonium cation, a glycidyltrimethylammonium cation, and a trimethylaminoethylacrylate cation.
  • the above (FSO 2 ) 2 is used from the viewpoint of realizing high electric peelability in the first pressure-sensitive adhesive layer 11 by utilizing high diffusibility of cations.
  • An ionic liquid containing N- [bis (fluorosulfonyl) imide anion] and a cation having a molecular weight of 160 or less is particularly preferable.
  • Examples of the cation having a molecular weight of 160 or less include 1-methylimidazolium cation, 1-ethyl-3-methylimidazolium cation, 1-propyl-3-methylimidazolium cation, 1-butyl-3-methylimidazolium cation, 1-pentyl-3-methylimidazolium cation, 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-butyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, 1-ethyl-1-methyl
  • Examples include pyrrolidinium cation, 1-butyl-1-methylpyrrolidinium cation, tetraethylammonium cation, glycidyltrimethylammonium cation, and trimethylaminoethyl acrylate cation.
  • Examples of commercially available ionic liquids contained in the first pressure-sensitive adhesive layer 11 include “Elexel AS-110”, “Elexel MP-442”, “Elexel IL-210” manufactured by Daiichi Kogyo Seiyaku Co., Ltd. “Elexel MP-471”, “Elexel MP-456”, and “Elexel AS-804” may be mentioned.
  • alkali metal salt examples include LiCl, Li 2 SO 4 , LiBF 4 , LiPF 6 , LiClO 4 , LiAsF 6 , LiCF 3 SO 3 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 C 2 F 5 ).
  • the content of the ionic liquid in the first pressure-sensitive adhesive layer 11 is, for example, 0.1% with respect to 100 parts by mass of the polymer in the first pressure-sensitive adhesive layer 11 in order to impart electric peelability in the first pressure-sensitive adhesive layer 11.
  • the content of the ionic liquid in the first pressure-sensitive adhesive layer 11 is, for example, 0.1% with respect to 100 parts by mass of the polymer in the first pressure-sensitive adhesive layer 11 in order to impart electric peelability in the first pressure-sensitive adhesive layer 11.
  • From the viewpoint of realizing 1 part by mass or more and better electrical releasability preferably 0.5 parts by mass or more, more preferably 0.6 parts by mass or more, further preferably 0.8 parts by mass or more, Especially preferably, it is 1.0 mass part or more, Most preferably, it is 1.5 mass part or more.
  • the content of the ionic liquid in the first pressure-sensitive adhesive layer 11 is within the first pressure-sensitive adhesive layer 11.
  • the amount is preferably 30 parts by mass or less, more preferably 20 parts by mass or less, further preferably 15 parts by mass or less, particularly preferably 10 parts by mass or less, and most preferably 5 parts by mass or less based on 100 parts by mass of the polymer.
  • the first pressure-sensitive adhesive layer 11 may contain other components as long as the effects of the present invention are not impaired.
  • components include tackifiers, silane coupling agents, colorants, pigments, dyes, surface lubricants, leveling agents, softeners, antioxidants, anti-aging agents, light stabilizers, and polymerization inhibitors. , Inorganic or organic fillers, metal powders, particulates, and foils.
  • the content of these components is determined within a range that does not impair the effects of the present invention according to the purpose of use. For example, it is 10 parts by mass or less with respect to 100 parts by mass of the polymer.
  • the thickness of the 1st adhesive layer 11 is not specifically limited, From a viewpoint of implement
  • the second pressure-sensitive adhesive layer 13 contains a polymer for expressing the pressure-sensitive adhesiveness in the second pressure-sensitive adhesive layer 13.
  • the thickness of the 2nd adhesive layer 13 is not specifically limited, From a viewpoint of implement
  • the energizing substrate 12 is not particularly limited as long as it has a laminated structure including the conductive layer 12a and the substrate layer 12b.
  • an aluminum vapor deposition film including an aluminum vapor deposition film on a plastic film can be used.
  • the thickness of the substrate 12 for energization is not particularly limited, but is preferably 10 ⁇ m or more, more preferably 12 ⁇ m or more, and further preferably 25 ⁇ m or more.
  • the thickness of the energizing substrate 12 is preferably 1000 ⁇ m or less, more preferably 500 ⁇ m or less, further preferably 300 ⁇ m or less, and particularly preferably 100 ⁇ m or less.
  • the base material layer 12b is a part that functions as a support, and examples thereof include a plastic base material, a fiber base material, a paper base material, and a laminate thereof.
  • the base material layer 12b may be a single layer or multiple layers.
  • the base material layer 12b may be subjected to various processes such as a back surface process, an antistatic process, and an undercoat process as necessary.
  • the thickness of the base material layer 12b is not particularly limited, but is preferably 10 ⁇ m or more, more preferably 12 ⁇ m or more, and further preferably 25 ⁇ m or more. Further, the thickness of the base material layer 12b is preferably 1000 ⁇ m or less, more preferably 500 ⁇ m or less, further preferably 300 ⁇ m or less, and particularly preferably 100 ⁇ m or less.
  • the conductive layer 12a is a conductive layer, and is made of, for example, a metal or a conductive polymer. Such a conductive layer 12a can be formed by plating, chemical vapor deposition, sputtering, or the like.
  • the thickness of the conductive layer 12a is not particularly limited, but is preferably 0.001 ⁇ m or more, more preferably 0.01 ⁇ m or more, further preferably 0.03 ⁇ m or more, and 0.05 ⁇ m or more. Is particularly preferred. Further, it is preferably 1000 ⁇ m or less, more preferably 500 ⁇ m or less, further preferably 300 ⁇ m or less, particularly preferably 50 ⁇ m or less, and most preferably 10 ⁇ m or less.
  • the first extending portion 14 is a portion where the first pressure-sensitive adhesive layer 11 and the current-carrying base material 12 extend and extend beyond the second pressure-sensitive adhesive layer 13 in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet 10. It is.
  • the second extending portion 15 is a portion where the energizing base material 12 extends from the first extending portion 14 so as to extend beyond the first pressure-sensitive adhesive layer 11 in the surface spreading direction of the pressure-sensitive adhesive sheet 10. is there.
  • the tape-like pressure-sensitive adhesive sheet 10 may have a configuration in which a first extension portion 14 and a second extension portion 15 are provided at the tip portion.
  • the structure provided so that the 1st extension part 14 and the 2nd extension part 15 may protrude in the sheet-like adhesive sheet 10 may be sufficient.
  • the separator (release liner) may be provided in the surface of the 1st adhesive layer 11 and the 2nd adhesive layer 13 of the adhesive sheet 10 of 1st Embodiment.
  • the separator is an element for protecting the first pressure-sensitive adhesive layer 11 and the second pressure-sensitive adhesive layer 13 of the pressure-sensitive adhesive sheet 10 from being exposed, and the pressure-sensitive adhesive sheet 10 is attached when the pressure-sensitive adhesive sheet 10 is attached to an adherend. Peeled off.
  • the pressure-sensitive adhesive sheet 10 may be sandwiched between two separators, or the pressure-sensitive adhesive sheet 10 may be wound in a roll with a separator so that the pressure-sensitive adhesive sheet 10 and the separator are alternately arranged. .
  • the separator examples include a substrate having a release treatment layer, a low adhesive substrate made of a fluoropolymer, and a low adhesive substrate made of a nonpolar polymer.
  • the surface of the separator may be subjected to release treatment, antifouling treatment, or antistatic treatment.
  • the thickness of the separator is, for example, 5 to 200 ⁇ m.
  • Adhesive strength of adhesive sheet Each adhesive surface of the adhesive sheet 10, that is, the surface on the first adhesive layer 11 side and the surface on the second adhesive layer 13 side, is peeled by 180 ° from the viewpoint of realizing good adhesive force. It is preferable that the adhesive strength (vs. SUS304 plate, tensile speed 300 mm / min, peeling temperature 23 ° C.) is 0.1 N / 10 mm or more. About 180 degree peeling adhesive force of the adhesive sheet 10, it can measure according to JISZ0237 as follows, for example.
  • the adhesive sheet 10 With a separator on both surfaces, after peeling off one separator, it sticks to the polyethylene terephthalate (PET) film of thickness 50 micrometers on the exposed adhesive surface, and the adhesive sheet 10 is lined. Next, a test piece (width 10 mm ⁇ length 100 mm) is cut out from the backed adhesive sheet 10. Next, the other separator is peeled off from the test piece, and the test piece is bonded to a stainless steel plate (SUS304) as an adherend, and then the test piece and the adherend are pressure-bonded by reciprocating a 2 kg roller once. .
  • PAT polyethylene terephthalate
  • 180 degree peeling adhesive force (tensile speed: 300 mm / min, peeling temperature) is used using a peeling tester (trade name “Variable Peel Measuring Machine YSP”, manufactured by Asahi Seiko Co., Ltd.). 23 ° C.).
  • a pressure-sensitive adhesive composition for forming the first pressure-sensitive adhesive layer 11 and a pressure-sensitive adhesive for forming the second pressure-sensitive adhesive layer 13 are used.
  • Each agent composition (second composition) is prepared.
  • a 1st composition is apply
  • the first pressure-sensitive adhesive layer 11 is formed.
  • a 2nd composition is apply
  • the second pressure-sensitive adhesive layer 13 is formed.
  • the adhesive sheet 10 can be manufactured in this way.
  • the adhesive sheet 10 may be manufactured by a so-called transfer method. Specifically, first, the first pressure-sensitive adhesive layer 11 and the second pressure-sensitive adhesive layer 13 are each formed on a separator (release liner). About the 1st adhesive layer 11, after apply
  • the 1st adhesive layer 11 with a separator is bonded together to the conductive layer 12a side of the base material 12 for electricity supply.
  • the 2nd adhesive layer 13 with a separator is bonded together to the base material layer 12b side of the base material 12 for electricity supply.
  • the adhesive sheet 10 can be manufactured in this way.
  • FIG. 3 is an exploded view of the joined body 40 (hereinafter also simply referred to as “joined body 40 of the present embodiment” or “joined body 40”) according to the first embodiment of the present invention.
  • FIG. 3 is an enlarged view of a dotted line part 3;
  • the bonded body 40 of the present embodiment is a bonded body including the pressure-sensitive adhesive sheet 10 of the present embodiment, the first adherend 20, and the second adherend 30.
  • the extending portion 14 is folded in the direction of the second pressure-sensitive adhesive layer 13, and the first adherend 20 is separated from the first pressure-sensitive adhesive layer 11 by the unfolded portion of the electrodetachable pressure-sensitive adhesive sheet 10.
  • the second adherend 30 is attached to the electrodetachable pressure-sensitive adhesive sheet 10 by the second pressure-sensitive adhesive layer 13 and the folded portion of the first pressure-sensitive adhesive layer 11. And is in contact with the conductive layer in the second extension 15.
  • the first extending portion 14 of the pressure-sensitive adhesive sheet 10 according to the present embodiment is folded back in the direction of the second pressure-sensitive adhesive layer 13, and the first pressure-sensitive adhesive layer.
  • the first adherend is stuck to the unfolded portion of 11
  • the second adherend 30 is stuck to the folded portion of the second adhesive layer 13 and the first adhesive layer 11.
  • the pressure-sensitive adhesive sheet 10 has the first extension portion 14 and the second pressure-sensitive adhesive layer 13 as shown in FIG.
  • the portion of the first pressure-sensitive adhesive layer 11 that is not folded back (that is, the upper surface in FIG. 4) is attached to the first adherend 20, and the second pressure-sensitive adhesive layer and Then, the first adhesive layer 11 of the folded first extending portion 14 is affixed to the second adherend 30.
  • the position at which the first extending portion 14 is folded back is not particularly limited, and may be folded along the end of the second pressure-sensitive adhesive layer 13 as shown in FIG. 4, or as shown in FIG. You may fold in places other than the edge part of the 2nd adhesive layer 13.
  • the second adherend 30 is attached to the conductive layer 12a of the adhesive sheet 10 and the region B in FIG. , In the region B ′ in FIG. 5), a stable electrical contact state is obtained. Further, the second adherend 30 and the pressure-sensitive adhesive sheet 10 are formed by the second pressure-sensitive adhesive layer 13 and the first pressure-sensitive adhesive layer 11 of the folded first extending portion 14 in FIGS. Since it is affixed in the region (or regions A ′ and C ′ in FIG. 5), stable adhesion can be secured, and the conductive layer 12a of the base 12 for energization comes into contact with an unintended location, There is no fear that a voltage cannot be properly applied to one adhesive layer 11.
  • the 1st extension part 14 consists of the 1st adhesive layer 11 and the base material 12 for electricity supply, ie, the 2nd adhesive layer 13 does not exist in the 1st extension part 14.
  • the increase in thickness due to the folding is suppressed to a minimum, and stable bonding and stable conduction between the second adherend 30 and the conductive layer 12a can be achieved.
  • the first adherend 20 and the second adherend 30 have conductivity.
  • the constituent material of the adherend include aluminum, copper, iron, silver, and alloys containing these. Moreover, a conductive polymer etc. may be sufficient.
  • the conductivity may be at least a portion necessary for achieving the effects of the present invention.
  • the first adherend 20 at least a portion in contact with the first pressure-sensitive adhesive layer 11 and a voltage application device. It is only necessary that the portions that are in contact with the terminal have electrical conductivity, and these portions are electrically connected.
  • the second adherend at least the portion that contacts the conductive layer 12a of the base 12 for energization, and the voltage application device It is only necessary that the portions that are in contact with each other have conductivity and these portions are conductive.
  • FIG. 6 shows a schematic view when the first adherend 20 and the second adherend 30 are peeled in the joined body 40 of the present embodiment.
  • the voltage is applied to the first adhesive layer 11 via the first adherend 20 and the conductive layer 12a of the adhesive sheet 10. Stripping while applying.
  • the conductive layer 12a of the pressure-sensitive adhesive sheet 10 is in electrical contact with the second adherend 30, and the first adherend 20 and the second adherend 30 are in contact with each other. Since the voltage can be applied by contacting the terminals of the voltage application device, the voltage can be stably applied.
  • the applied voltage to the first pressure-sensitive adhesive layer 11 is preferably 1 V or higher, more preferably 3 V or higher, and further preferably 6 V or higher. Further, it is preferably 100 V or less, more preferably 50 V or less, further preferably 30 V or less, and particularly preferably 15 V or less. Within such a range, the joined body can be separated efficiently, which is preferable. For example, within such a range, it is possible to use a readily available battery such as a dry battery as a power source for the voltage application device. Moreover, it is preferable that the application time of the voltage with respect to the 1st adhesive layer 11 is short, Specifically, Preferably it is less than 60 second, More preferably, it is less than 40 second, More preferably, it is less than 20 second. Within such a range, it is suitable for improving the efficiency of the separation work of the joined body. These preferable application voltages and preferable application times are the same in the second embodiment described later.
  • FIG. 7 is a schematic view of an electrodetachable pressure-sensitive adhesive sheet 110 (hereinafter, also simply referred to as “pressure-sensitive adhesive sheet of this embodiment” or “pressure-sensitive adhesive sheet 110”) according to the second embodiment of the present invention.
  • the pressure-sensitive adhesive sheet 110 according to the present embodiment includes a first base 112 made of a conductive substrate 112 having a conductive layer 112a and a base layer 112b, and an electro-peeling adhesive formed on the conductive layer 112a of the conductive substrate 112.
  • the second pressure-sensitive adhesive layer 113 and The energizing substrate 112 has an extending portion 114 that extends and extends beyond the first pressure-sensitive adhesive layer 111 in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet 110.
  • Each layer constituting the pressure-sensitive adhesive sheet of the second embodiment is the same as the pressure-sensitive adhesive sheet of the first embodiment, and only the configuration of the extending portion is different. Below, only a different point from the adhesive sheet of 1st Embodiment is demonstrated.
  • the first pressure-sensitive adhesive layer 111 and the current-carrying substrate 112 are more than the second pressure-sensitive adhesive layer 113 in the surface spreading direction of the electrodetachable pressure-sensitive adhesive sheet 110. It is also a part that extends and extends.
  • the dimension and shape of the extension part 114 are not particularly limited.
  • the tape extension is the same as that described for the first extension part 14 and the second extension part 15 of the first embodiment.
  • the extension part 114 may be provided at the tip, or the extension part 114 may be provided so as to protrude from the sheet-like adhesive sheet. .
  • FIG. 8 is an exploded view of a joined body 140 according to the second embodiment of the present invention (hereinafter, also simply referred to as “the joined body 140 of the present embodiment” or “joined body 140”), and FIG. It is an enlarged view of the dotted line part of 8.
  • the joined body 140 of the present embodiment is a joined body including the pressure-sensitive adhesive sheet 110 of the present embodiment, the first adherend 120, and the second adherend 130, and the second adherend 130. Is adhered to the electrodetachable pressure-sensitive adhesive sheet by the second pressure-sensitive adhesive layer 113, and the pressure-sensitive adhesive sheet 110 sandwiches the second adherend 130 along the end of the second adherend 130. And at least a part of the extended portion 114 is adhered to the surface of the second adherend 130 opposite to the first adherend 120 by the second pressure-sensitive adhesive layer 113. The first adherend 120 is adhered to the pressure-sensitive adhesive sheet 110 by the unfolded portion of the first pressure-sensitive adhesive layer 111.
  • the adhesive sheet 110 according to this embodiment is folded back so as to sandwich the second adherend 130 along the end of the second adherend 130. Then, the second adhesive layer 113 is attached to the second adherend 130, the unfolded portion of the first adhesive layer 111 is attached to the first adherend 120, and the extension 114 The first adherend is attached such that at least a part of the first adherend is adhered to the surface of the second adherend 130 opposite to the first adherend 120 by the second adhesive layer 113. After bonding 120 and the second adherend 130, a voltage is applied to the first pressure-sensitive adhesive layer 111 so as to generate a potential difference in the thickness direction, and the first adherend 120 and the second adherend 130 are bonded. The body 130 is separated.
  • the adhesive sheet 110 sandwiches the second adherend 130 along the end as shown in FIG.
  • the adhesive sheet 110 sandwiches the second adherend 130 along the end as shown in FIG.
  • at least a part of the extended portion 114 is attached to the surface of the second adherend 130 opposite to the first adherend 120 by the second pressure-sensitive adhesive layer 113. It is affixed.
  • the position at which the adhesive sheet 110 is folded back is not particularly limited, and may be folded along the end of the first pressure-sensitive adhesive layer 111 as shown in FIG. 9, or as shown in FIG. Although it may be folded at a portion other than 114, it is preferably folded along the end of the first pressure-sensitive adhesive layer 111.
  • the first adherend 120 has electrical conductivity, similar to the first adherend 20 in the first embodiment.
  • the second adherend 130 may or may not have conductivity.
  • the current-carrying substrate 112 exposed in the extending portion is formed by the second pressure-sensitive adhesive layer 113. Since the second adherend 130 is affixed to the surface opposite to the first adherend and is stable, the conductive layer 112a of the energizing substrate 112 contacts an unintended location, and There is no fear that a voltage cannot be appropriately applied to the pressure-sensitive adhesive layer 111.
  • FIG. 11 shows a schematic view when the first adherend 120 and the second adherend 130 are peeled in the joined body 140 of the present embodiment.
  • a voltage is applied to the first adhesive layer 111 via the first adherend 120 and the conductive layer 112a of the adhesive sheet 110. Stripping while applying.
  • FIG. 11 shows a schematic diagram when the bonded body 140 of the present embodiment is electrically peeled.
  • the extended portion folded back so as to sandwich the first adherend 120 and the second adherend 130 with respect to the first adhesive layer 111 of the adhesive sheet 110. Since a voltage can be applied through the conductive layer 112a, the voltage can be stably applied.
  • the pressure-sensitive adhesive sheet 110 is folded back so as to sandwich the second adherend 130 along the end portion of the second adherend 130, and at least a part of the extension portion is the first.
  • a voltage applying device is applied to the conductive layer 112a and the first adherend 120 that are attached to the surface of the second adherend 130 opposite to the first adherend 120 and exposed at the extension. Since the voltage can be applied by contacting these terminals, the voltage can be stably applied.
  • SYMBOLS 10,110 Electrically peelable adhesive sheet 11, 111: 1st adhesive layer 12, 112: Base material 12a for electricity supply, 112a: Conductive layer 12b, 112b: Base material layer 13, 113: 2nd adhesive layer 14: 1st extension part 15: 2nd extension part 20, 120: 1st adherend 30, 130: 2nd adherend 40, 140: joined body 50, 60, 150, 160: Terminal 114: Extension part

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
PCT/JP2019/008825 2018-03-08 2019-03-06 電気剥離型粘着シート、接合体、並びに被着体の接合及び分離方法 Ceased WO2019172304A1 (ja)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP19764294.5A EP3763796B1 (en) 2018-03-08 2019-03-06 Electrical debonding type adhesive sheet, joined body, and joining and separation method for adherend
KR1020207024822A KR20200130264A (ko) 2018-03-08 2019-03-06 전기 박리형 점착 시트, 접합체, 그리고 피착체의 접합 및 분리 방법
EP25175676.3A EP4574425A3 (en) 2018-03-08 2019-03-06 Electrical debonding type adhesive sheet, joined body, and joining and separation method for adherend
CN201980016859.2A CN111819257B (zh) 2018-03-08 2019-03-06 电剥离型粘合片材、接合体、和被粘接物的接合及分离方法
US16/979,014 US11623429B2 (en) 2018-03-08 2019-03-06 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend
US18/178,670 US11964462B2 (en) 2018-03-08 2023-03-06 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend
US18/610,364 US12441083B2 (en) 2018-03-08 2024-03-20 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend
US19/334,074 US20260014775A1 (en) 2018-03-08 2025-09-19 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend

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JP2018042353A JP7063660B2 (ja) 2018-03-08 2018-03-08 電気剥離型粘着シート、接合体、並びに被着体の接合及び分離方法
JP2018-042353 2018-03-08

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US16/979,014 A-371-Of-International US11623429B2 (en) 2018-03-08 2019-03-06 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend
US18/178,670 Division US11964462B2 (en) 2018-03-08 2023-03-06 Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend

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JP (1) JP7063660B2 (https=)
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CN (1) CN111819257B (https=)
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EP4194200B1 (en) 2021-03-26 2025-08-20 Lintec Corporation Electrically debondable adhesive sheet, and method for releasing electrically debondable adhesive sheet
JP7697512B2 (ja) 2021-07-09 2025-06-24 Dic株式会社 粘着テープ、物品、及び物品の解体方法
JP7743867B2 (ja) * 2021-07-09 2025-09-25 Dic株式会社 粘着テープ、物品、及び物品の解体方法
JP7685398B2 (ja) * 2021-08-31 2025-05-29 リンテック株式会社 電気剥離性粘着シート
CN114261105B (zh) * 2021-11-23 2023-10-03 航天海鹰(镇江)特种材料有限公司 一种判断钛合金与复材大曲率零件胶接质量的方法

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CN111819257B (zh) 2023-01-06
US12441083B2 (en) 2025-10-14
EP3763796A1 (en) 2021-01-13
US11964462B2 (en) 2024-04-23
KR20200130264A (ko) 2020-11-18
EP3763796A4 (en) 2021-12-15
US20230256710A1 (en) 2023-08-17
US11623429B2 (en) 2023-04-11
JP2019156914A (ja) 2019-09-19
US20240217208A1 (en) 2024-07-04
JP7063660B2 (ja) 2022-05-09
EP4574425A2 (en) 2025-06-25
EP3763796B1 (en) 2025-07-09
EP4574425A3 (en) 2025-09-24
US20200406582A1 (en) 2020-12-31
CN111819257A (zh) 2020-10-23
TW201938726A (zh) 2019-10-01
US20260014775A1 (en) 2026-01-15

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