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WO2016076131A1 - Ruban adhésif double face, objet et procédé de séparation - Google Patents

Ruban adhésif double face, objet et procédé de séparation Download PDF

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Publication number
WO2016076131A1
WO2016076131A1 PCT/JP2015/080553 JP2015080553W WO2016076131A1 WO 2016076131 A1 WO2016076131 A1 WO 2016076131A1 JP 2015080553 W JP2015080553 W JP 2015080553W WO 2016076131 A1 WO2016076131 A1 WO 2016076131A1
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WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
double
adhesive tape
layer
sided pressure
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/JP2015/080553
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English (en)
Japanese (ja)
Inventor
誠二 秋山
森野　彰規
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.)
DIC Corp
Original Assignee
DIC Corp
Dainippon Ink and Chemicals Co Ltd
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 DIC Corp, Dainippon Ink and Chemicals Co Ltd filed Critical DIC Corp
Priority to JP2016558977A priority Critical patent/JP6120123B2/ja
Priority to CN201580056803.1A priority patent/CN107075323A/zh
Publication of WO2016076131A1 publication Critical patent/WO2016076131A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers

Definitions

  • the present invention is applied to an adherend and fixed between articles, and is pasted by an easily dismantleable double-sided adhesive tape that can be easily released after a certain period of time, and the double-sided adhesive tape.
  • the present invention relates to a method for separating two or more adherends combined.
  • Adhesive tape is a bonding means with excellent workability and high bonding reliability. It displays parts fixing applications in various industrial fields such as OA equipment, IT equipment, home appliances, automobiles, temporary fixing of parts, and product information. Used for labeling applications. In recent years, from the viewpoint of protecting the global environment, there is an increasing demand for recycling and reuse of used products in these industrial fields. When recycling and reusing various products, it is necessary to fix the parts and peel off the adhesive tape used for the labels. However, since the adhesive tape is provided at various locations in the product, Reduction of the work cost by a removal process is desired.
  • an adhesive tape that can be peeled relatively easily for example, an adhesive member having two or more adhesive layers having different adhesive forces is disclosed (see Patent Document 1).
  • the adhesive tape is obtained by bonding the adherend through a weak adhesive layer in an adhesive member having an adhesive layer having a superposed structure, thereby easily fixing the adherend and making the weak adhesive layer a release surface. It is an adhesive member that realizes easy disassembly.
  • the pressure-sensitive adhesive member has a problem that the manufacturing cost is high because a plurality of pressure-sensitive adhesive layers are essential. Moreover, since it is the structure by which adhesion
  • the problem to be solved by the present invention can be used for attaching to an adherend or fixing two or more adherends, and can be easily disassembled when separating the two or more adherends. Is to provide a simple double-sided adhesive tape.
  • the present invention relates to a double-sided pressure-sensitive adhesive tape characterized by having a pressure-sensitive adhesive layer directly or via another layer on both sides of an easily disintegrable layer containing a binder and thermally expandable microspheres.
  • the present invention also relates to an article characterized by having a configuration in which two or more adherends are bonded by the double-sided adhesive tape.
  • the present invention also relates to a method for separating two or more adherends constituting the article by heating the easily disintegrable layer constituting the article and expanding the thermally expandable microspheres.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be attached to an adherend, can firmly bond two or more adherends, and dismantle the article by eliminating the adhesion between the adherends.
  • the two or more adherends can be easily separated by heating.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be produced.
  • the separation method of the present invention it is possible to easily separate the adherends from each other.
  • the double-sided pressure-sensitive adhesive tape of the present invention is characterized by having a pressure-sensitive adhesive layer directly or via another layer on both surfaces of an easily dismantled layer containing a binder and thermally expandable microspheres.
  • FIG. 1 is an example of an embodiment of a double-sided pressure-sensitive adhesive tape according to the present invention.
  • the double-sided pressure-sensitive adhesive tape 1 has pressure-sensitive adhesive layers 20 and 21 on both sides of an easily dismantled layer 10 containing a binder 11 and thermally expandable microspheres 12. Release sheets 30 and 31 may be laminated on the pressure-sensitive adhesive layers 20 and 21, respectively.
  • the easily dismantled layer 10 contains a binder 11 and thermally expandable microspheres 12.
  • the easily dismantled layer is a layer that is broken by a peeling stress such as separating the adherends when separating two or more adherends bonded together by the double-sided adhesive tape.
  • thermoplastic As the binder, a binder that can be easily disassembled by the expansion force of the thermally expandable microspheres can be used. Moreover, it is preferable to use what is thermoplastic as said binder.
  • the thermoplastic be 1Hz and scope storage modulus G 23 is 1.0 ⁇ 10 3 ⁇ 5.0 ⁇ 10 7 Pa as measured with a dynamic viscoelasticity spectrum at 23 ° C. of the binder
  • the storage elastic modulus G 120 measured by a dynamic viscoelastic spectrum at 1 Hz and 120 ° C. is in the range of 1.0 ⁇ 10 2 to 5.0 ⁇ 10 6 Pa.
  • the storage elastic modulus measured by a dynamic viscoelastic spectrum at 1 Hz and 23 ° C. of the binder constituting the easily dismantled layer It is preferable to use a material having G 23 of 1.0 ⁇ 10 3 to 5.0 ⁇ 10 7 Pa, and more preferably a material having G 23 of 5.0 ⁇ 10 3 to 5.0 ⁇ 10 6 Pa. It is preferable to use a material having a pressure of 5.0 ⁇ 10 3 to 1.0 ⁇ 10 6 Pa, and it is particularly preferable to use a material having a pressure of 1.0 ⁇ 10 4 to 1.0 ⁇ 10 6 Pa. preferable.
  • the storage elastic modulus G 120 measured by a dynamic viscoelastic spectrum at 1 Hz and 120 ° C. of the binder constituting the easily dismantled layer is 1.0 ⁇ 10 10. It is more preferable to use 2 to 5.0 as a ⁇ 10 6 Pa and is 6 preferably 5.0 ⁇ 10 2 ⁇ 1.0 ⁇ 10 be used for this purpose Pa, 5.0 ⁇ 10 2 ⁇ more preferable to use what is 5.0 ⁇ 10 5 Pa, it is particularly preferable to use one which is 5.0 ⁇ 10 2 ⁇ 5.0 ⁇ 10 5 Pa.
  • the storage elastic modulus G 120 of the binder in the easy dismantling layer it is preferable that the smaller than the storage modulus G 23.
  • the storage modulus G 23 and G 120 refers to the results of the measurement for test piece formed by using a binder which constitutes the Disassembly layer.
  • the test piece does not contain thermally expandable microspheres.
  • the thickness of the test piece is 2 mm.
  • the test piece can be obtained by, for example, applying a binder contained in the easily dismantled layer on the sheet.
  • Storage modulus G 23 and G 120, using a commercial viscoelastic tester, can be measured by the method described in the examples below.
  • the thickness of the easily dismantled layer is preferably 5 ⁇ m to 80 ⁇ m, more preferably 5 ⁇ m to 60 ⁇ m, and even more preferably 10 ⁇ m to 50 ⁇ m.
  • the thickness of the easily dismantled layer is an average value obtained by measuring the thicknesses of 5 locations randomly selected in the thickness direction of the easily dismantled layer. When the thickness of the easily dismantled layer is within the above range, it is possible to form an easily dismantled layer that is easy to form a layer and is excellent in easy disassembly.
  • thermoplastic resin As the binder contained in the easily dismantled layer, for example, it is preferable to use a thermoplastic resin because it is easily softened by heat and easily disassembled.
  • thermoplastic resin examples include urethane resins such as polyurethane (PU) and thermoplastic polyurethane (TPU); polycarbonate (PC); polyvinyl chloride (PVC) and vinyl chloride such as vinyl chloride-vinyl acetate copolymer resin.
  • PU polyurethane
  • TPU thermoplastic polyurethane
  • PC polycarbonate
  • PVC polyvinyl chloride
  • PVC vinyl chloride
  • Resins such as polyacrylic acid, polymethacrylic acid, polymethyl acrylate, polymethyl methacrylate (PMMA) and polyethyl methacrylate; polyethylene terephthalate (PET), polybutylene terephthalate, Polyester resins such as polytrimethylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate; Polyamide resins such as nylon (registered trademark); Polystyrene (PS), Imido-modified polystyrene, Acrylonitrile butadiene, Styrene (ABS) resin, Imi Modified ABS resin, styrene / acrylonitrile copolymer (SAN) resin, polystyrene resin such as acrylonitrile / ethylene-propylene-diene / styrene (AES) resin, polyethylene (PE) resin, polypropylene (PP) resin, cycloolefin resin, etc.
  • PS Polys
  • Olefin resins Cellulosic resins such as nitrocellulose and cellulose acetate; Silicone resins; Thermoplastic resins such as fluororesins, Styrenic thermoplastic elastomers, Olefin thermoplastic elastomers, Vinyl chloride thermoplastic elastomers, Urethane heat Examples include thermoplastic elastomers such as plastic elastomers, ester-based thermoplastic elastomers, and amide-based thermoplastic elastomers.
  • thermoplastic resins among them, styrene thermoplastic elastomer, olefin thermoplastic elastomer, vinyl chloride thermoplastic elastomer, ester thermoplastic elastomer, urethane thermoplastic elastomer, amide thermoplastic elastomer or acrylic It is preferable to use a styrene resin or the like, and it is particularly preferable to use a styrene thermoplastic elastomer or an acrylic resin.
  • Styrenic thermoplastic elastomers include, for example, styrene diblock copolymers such as styrene-ethylene-butylene copolymer (SEB); styrene-butadiene-styrene copolymers (SBS), hydrogenated SBS (styrene) -Ethylene-butylene-styrene copolymer (SEBS)), styrene-isoprene-styrene copolymer (SIS), hydrogenated product of SIS (styrene-ethylene-propylene-styrene copolymer (SEPS)), styrene-isobutylene -Styrene triblock copolymer such as styrene copolymer (SIBS); Styrene tetrablock copolymer such as styrene-butadiene-styrene-butadiene (SBSB); St
  • the styrenic thermoplastic elastomer it is possible to use a mixture of the styrene triblock copolymer and the styrene diblock copolymer, the storage elastic modulus at 23 ° C. and the storage elastic modulus at 120 ° C., It has a value obtained by dividing the storage elastic modulus at 23 ° C. by the storage elastic modulus measured at 120 ° C. As a result, two or more adherends are firmly bonded under a room temperature region of approximately 23 ° C.
  • an adhesive tape that can be easily separated from two or more adherends by being heated to about 120 ° C., and the styrenic diblock copolymer is added to the entire styrenic thermoplastic elastomer. It is more preferable to use those contained in the range of 10% by mass to 90% by mass, and in the range of 15% by mass to 80% by mass. Preferably the al, and particularly preferably used in the range of 20 mass% to 75 mass%.
  • those having a weight average molecular weight in the range of 10,000 to 800,000 are preferably used in order to further improve the dismantling property by heating. It is more preferable to use those having a weight average molecular weight of 150,000 to 450,000, and it is more preferable to use those having a weight average molecular weight in the range of 150,000 to 450,000.
  • acrylic resin for example, a resin obtained by polymerizing a monomer containing an alkyl (meth) acrylate can be used.
  • alkyl (meth) acrylate a (meth) acrylate having an alkyl group having 4 to 12 carbon atoms is preferably used.
  • butyl (meth) acrylate, isooctyl (meth) acrylate, 2- Ethylhexyl (meth) acrylate or the like is preferably used, and butyl acrylate and 2-ethylhexyl acrylate are more preferably used alone or in combination.
  • acrylonitrile (meth) acrylic acid, maleic anhydride, acrylamide, itaconic acid, styrene, vinyl acetate and the like can be used as the monomer.
  • the thermally expandable microspheres contained in the easily dismantled layer can expand due to the influence of heat.
  • the thermally expandable microspheres those having a thermal expansion coefficient at 120 ° C. of 150% or more are preferably used, and those having a thermal expansion coefficient at 120 ° C. of 170% or more are used. More preferably, the one having a coefficient of thermal expansion at 120 ° C. of 200% or more is further preferred, the one having a coefficient of thermal expansion at 120 ° C. of 220% or more is particularly preferred, and 250% or more It is particularly preferable to use a material that is easy to disassemble the easily dismantled layer, and as a result, the adherends can be easily separated from each other.
  • the upper limit of the expansion coefficient is not particularly limited, but is preferably approximately 5000%.
  • the said thermal expansion coefficient points out the value calculated with the following method.
  • thermally expandable microspheres (not expanded) is placed in a volumetric flask, and the true specific gravity is measured by a water displacement method.
  • 1 g of the thermally expandable microspheres is placed in a gear type oven and heated at 120 ° C. for 2 minutes to expand.
  • the expanded microspheres are placed in a volumetric flask and the true specific gravity is measured by a water displacement method.
  • the ratio of the true specific gravity of the thermally expandable microsphere before expansion to the true specific gravity of the microsphere after thermal expansion was calculated and multiplied by 100 to obtain the coefficient of thermal expansion.
  • the expansion start temperature of the thermally expandable microspheres is not particularly limited, but is preferably 80 ° C. or higher, more preferably 85 ° C. to 120 ° C., and 90 ° C. to 120 ° C. It is more preferable to separate them without causing expansion when the layers are formed and without causing damage to two or more adherends due to heat.
  • the “expansion start temperature of the thermally expandable microsphere” is obtained by using a thermal analyzer (“TMA / SS6100”, manufactured by SII / Nanotechnology Co., Ltd.), and the expansion method (load: 0.1N, probe: 3 mm ⁇ , temperature increase rate: 5 ° C./min), the temperature of the thermally expandable microspheres started to expand.
  • the maximum expansion temperature of the thermally expandable microsphere is not particularly limited, but is preferably 90 ° C. or higher, preferably 90 ° C. to 180 ° C., and 100 ° C. or higher to 150 ° C. is 2 or higher. It is more preferable to separate them without causing damage to the adherend due to heat.
  • the above-mentioned “maximum expansion temperature” uses a thermal analyzer (“TMA / SS6100”, manufactured by SII / Nanotechnology Co., Ltd.), and an expansion method (load: 0.1 N, probe: This is the temperature at which the expansion of the thermally expandable microspheres is maximized when evaluated at 3 mm ⁇ and the heating rate of 5 ° C./min. Note that the thermally expandable microspheres heated to a temperature higher than the maximum expansion temperature usually contract and reduce the expansion rate, and therefore it is preferable not to heat to a temperature higher than the maximum expansion temperature.
  • the thermally expandable microspheres When producing the thermally expandable microspheres, it is difficult to make all the wall thickness of the capsule used for the production, the content of the gasified substance, etc. uniform, so the expansion start temperature and the maximum expansion The temperature usually has a certain range.
  • the particle size of the thermally expandable microspheres (before expansion) is not particularly limited, but when heated, the dismantling property of the easy dismantling layer is further improved and the thinning of the dismantling layer and the double-sided adhesive tape is realized. Therefore, it is preferably in the range of 1 ⁇ m to 50 ⁇ m, more preferably in the range of 3 ⁇ m to 30 ⁇ m, and still more preferably in the range of 5 ⁇ m to 20 ⁇ m.
  • the thermally expandable microspheres are usually a collection of particles having different particle sizes. Therefore, distribution (particle size distribution) is obtained when the particle diameter of the thermally expandable microsphere is measured.
  • the particle size (before expansion) of the thermally expandable microsphere was obtained by performing measurement by a laser diffraction scattering method 10 times using a particle size distribution measuring device “Mastersizer 2000” manufactured by Malvern. The maximum value and the minimum value of 10 local maximum values based on 10 particle size distributions are used to represent the range.
  • the maximum value of 10 local maximum values based on 10 particle size distributions obtained by measuring the particle size (before expansion) of the thermally expandable microspheres 10 times by the above method is 15 ⁇ m, and the minimum When the value is 9 ⁇ m, the particle diameter (before expansion) of the thermally expandable microsphere is expressed as 9 ⁇ m to 15 ⁇ m.
  • an elastic capsule containing a substance that is gasified by heat can be used.
  • the substance that can be gasified by heat is preferably a substance that can be gasified by being heated to about 80 ° C. to 150 ° C., specifically, butane, isobutane, propane, isopropane, isopentane, isooctane, etc. More preferably, is used.
  • a capsule composed of a softening agent when heated to about 90 ° C. to 150 ° C. can be used.
  • thermally expandable microspheres can be produced by a known and common method such as a coacervation method or an interfacial polymerization method.
  • thermally expandable microsphere examples include “Matsumoto Microsphere” (trade name, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.), “Microsphere Expandel” (trade name, manufactured by Nippon Philite Co., Ltd.), “ Commercial products such as “Die Form” (trade name, manufactured by Dainichi Seika Kogyo Co., Ltd.) can also be used.
  • the content (blending amount) of the heat-expandable microspheres is based on 100 parts by weight of the binder contained in the easy-dismantling layer in order to achieve both good adhesion to the pressure-sensitive adhesive layer and easy disassembly.
  • the amount is preferably 1 to 100 parts by mass, more preferably 3 to 50 parts by mass, and still more preferably 5 to 30 parts by mass.
  • the pressure-sensitive adhesive layers 20 and 21 are layers that adhere to the adherend.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layers 20 and 21 includes a natural rubber polymer, a synthetic rubber polymer, an acrylic polymer, a silicone polymer, a urethane polymer, a vinyl ether polymer, and the like. Can be used.
  • Examples of the form of the pressure-sensitive adhesive include aqueous systems such as solvent-based, emulsion-type pressure-sensitive adhesives, and water-soluble pressure-sensitive adhesives, and solventless systems such as hot-melt pressure-sensitive adhesives, UV-curable pressure-sensitive adhesives, and EB-curable pressure-sensitive adhesives. .
  • the pressure-sensitive adhesive layers 20 and 21 preferably contain an acrylic copolymer.
  • An acrylic copolymer is a copolymer of (meth) acrylic acid that imparts hydrophilicity and other monomers copolymerizable therewith, and is obtained by reacting (meth) acrylic acid with vinyl ether. (Meth) acrylate etc. are mentioned.
  • the thickness of the pressure-sensitive adhesive layer is preferably 5 ⁇ m to 100 ⁇ m, more preferably 10 ⁇ m to 80 ⁇ m, and even more preferably 30 ⁇ m to 70 ⁇ m. It is preferable for the thickness of the pressure-sensitive adhesive layer to be in the above range because layer formation is easy and adhesion between adherends is excellent.
  • the pressure-sensitive adhesive layers 20 and 21 may contain a tackifier resin, a crosslinking agent, other additives, and the like as necessary.
  • rosin tackifier resin for the purpose of adjusting the strong adhesion of the pressure-sensitive adhesive layer
  • rosin tackifier resin for the purpose of adjusting the strong adhesion of the pressure-sensitive adhesive layer
  • polymerized rosin tackifier resin polymerized rosin ester tackifier resin
  • rosin phenol tackifier examples thereof include a resin, a stabilized rosin ester tackifier resin, a disproportionated rosin ester tackifier resin, a terpene tackifier resin, a terpene phenol tackifier resin, and a petroleum resin tackifier resin.
  • the crosslinking agent may be a known isocyanate-based crosslinking agent, epoxy-based crosslinking agent, aziridine-based crosslinking agent, polyvalent metal salt-based crosslinking agent, metal chelate-based crosslinking agent.
  • Keto-hydrazide crosslinking agents, oxazoline crosslinking agents, carbodiimide crosslinking agents, silane crosslinking agents, glycidyl (alkoxy) epoxysilane crosslinking agents, and the like can be used.
  • the additive examples include a base for adjusting pH (such as aqueous ammonia), an acid, a foaming agent, a plasticizer, a softening agent, an antioxidant, as long as the desired effect of the present invention is not inhibited as necessary.
  • Fillers such as glass and plastic fibers, balloons, beads, metal powders, colorants such as pigments and dyes, pH adjusters, film formation aids, leveling agents, thickeners, water repellents, antifoaming agents, etc.
  • the known materials can be optionally added to the pressure-sensitive adhesive. Moreover, you may add an acid catalyst and an acid generator.
  • the acid catalyst and the acid generator can be used for the purpose of imparting disassembly by external stimulation of light or heat, for example.
  • the acid catalyst and the acid generator those exemplified as those usable for the easily dismantled layer can be used.
  • the pressure-sensitive adhesive that can be used for forming the pressure-sensitive adhesive layer
  • one that contains a solvent can be used in order to maintain good coating workability and the like.
  • the solvent for example, toluene, xylene, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, hexane and the like can be used.
  • water or an aqueous solvent mainly composed of water can be used as the solvent.
  • release sheets 30 and 31 examples include glassine paper, kraft paper, clay coat paper, paper laminated with a film such as polyethylene, paper coated with a resin such as polyvinyl alcohol or an acrylate copolymer, polyester, polypropylene, and the like. And those obtained by applying a fluororesin or silicone resin as a release agent to the synthetic resin film.
  • the pair of pressure-sensitive adhesive layers of the double-sided pressure-sensitive adhesive tape of the present embodiment may have the same configuration or different configurations.
  • the double-sided pressure-sensitive adhesive tape of this embodiment contains thermally expandable microspheres in the easily dismantled layer, the softening of the binder contained in the easily dismantled layer and the expansion of the thermally expandable microspheres are caused by heating. As a result, the adhesion between adherends can be disassembled with a weaker force than when an easily dismantled layer that does not contain a thermally expandable filler is used.
  • FIG. 2 is an example of an embodiment of a double-sided pressure-sensitive adhesive tape according to the present invention.
  • the double-sided pressure-sensitive adhesive tape 2 has pressure-sensitive adhesive layers 20 and 21 on both sides of the easy-disassembly layer 10 containing the binder 11 and the thermally expandable microspheres 12, and both between the easy-disassembly layer and the pressure-sensitive adhesive layer.
  • the base films 40 and 41 are provided. Release sheets 30 and 31 may be laminated on the pressure-sensitive adhesive layers 20 and 21, respectively.
  • the double-sided tape of said ⁇ 1st Embodiment> has further base film 40, 41 in both between the said easily dismantled layer and the said adhesive layer. It is. The description of points that are the same as those in the first embodiment will be omitted.
  • the base film examples include polyolefin (eg, polypropylene, polyethylene), polyester (eg, polyethylene terephthalate, polyethylene naphthalate), polystyrene, acrylonitrile-butadiene-styrene resin (ABS resin), polycarbonate, polyimide film, polychlorinated Nonwoven fabrics, papers, cloths, metal foils and the like obtained by using plastic films made of vinyl, nylon, polyvinyl alcohol, etc., pulp, rayon, Manila hemp, acrylonitrile, nylon, polyester, and the like.
  • polyolefin eg, polypropylene, polyethylene
  • polyester eg, polyethylene terephthalate, polyethylene naphthalate
  • ABS resin acrylonitrile-butadiene-styrene resin
  • ABS resin acrylonitrile-butadiene-styrene resin
  • Nonwoven fabrics, papers, cloths, metal foils and the like obtained by using plastic films made of vinyl, nylon, polyvin
  • the base film serves as a support when the double-sided adhesive tape is peeled off from the adherend after the adherends bonded with the double-sided adhesive tape are disassembled and the easily dismantled layer is broken. obtain.
  • the adhesiveness between the base film and the other layers of the double-sided pressure-sensitive adhesive tape (in this embodiment, the adhesiveness between the base films 40 and 41 and the adhesive layers 20 and 21) and the strength as a support are compatible. Since it is easy to do, a plastic film is preferable and a polyester film is more preferable.
  • corona treatment, plasma treatment, anchor coating treatment, or the like may be performed on one or both sides of the base film.
  • the double-sided pressure-sensitive adhesive tape of this embodiment when heated, the binder contained in the easy-dismantling layer is softened, and the thermally expandable microspheres are expanded, so that the cohesive force of the easy-dismantling layer is dramatically increased. Since it lowers and is easily disassembled, the double-sided pressure-sensitive adhesive tape is disassembled with little force after the heating, and two or more adherends can be separated from each other.
  • the double-sided pressure-sensitive adhesive tape of the second embodiment further has a base film between the easily dismantled layer and the pressure-sensitive adhesive layer.
  • the residue of the double-sided pressure-sensitive adhesive tape may remain on the adherend.
  • the double-sided pressure-sensitive adhesive tape of this embodiment further has a base film between the easily dismantled layer and the pressure-sensitive adhesive layer, the double-sided pressure-sensitive adhesive tape disassembled by catching and pulling the base film part, etc. The entire residue can be easily removed from the adherend.
  • the double-sided pressure-sensitive adhesive tape comprising the easily dismantled layer 10 containing the binder 11 and the heat-expandable microspheres 12, the pressure-sensitive adhesive layers 20, 21, the base film 40, 41, and the release sheets 30, 31.
  • it may further have an arbitrary layer structure.
  • a foam is used between the base films 40 and 41 and the pressure-sensitive adhesive layers 20 and 21 or between the base films 40 and 41 and the easily dismantled layer 10.
  • a material having a material layer can be used.
  • the foam layer serves as a cushion, and can provide cushioning properties to the double-sided pressure-sensitive adhesive tape having the foam layer.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be suitably used, for example, for adhesion between a rigid body and a rigid body as an adherend and separation between the rigid body and the rigid bodies.
  • the rigid adherend include a metal plate, a metal casing, a metal cover, a glass plate, and a plastic plate.
  • the two or more adherends bonded by the double-sided pressure-sensitive adhesive tape of the present invention may be the same kind of adherends or different kinds of adherends.
  • the adherends bonded and separated by the double-sided pressure-sensitive adhesive tape of the present invention may be the same kind of adherends or different kinds of adherends.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be easily disassembled by heating when separating between members during reuse or recycling. For this reason, it can be suitably used as a double-sided pressure-sensitive adhesive tape that fixes parts of various products in industrial applications such as automobiles, building materials, OA, and home appliance industries. The work efficiency is also good when separating a large amount of parts during reuse or recycling, or when removing a large amount of labels.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be disassembled at a relatively low heating temperature. Therefore, in particular, it can be suitably used as a double-sided pressure-sensitive adhesive tape for fixing an electrical product such as a mobile phone, a video display device, a computer or the like that is likely to be deteriorated due to heat.
  • the method for producing a double-sided pressure-sensitive adhesive tape of the present invention comprises preparing an easily disassembled layer containing a binder and thermally expandable microspheres, and bonding one adhesive layer to one side of the easily dismantled layer, and thereafter The other pressure-sensitive adhesive layer is bonded to the other side of the layer.
  • FIG. 3 is an example of an embodiment of a method for producing a double-sided pressure-sensitive adhesive tape according to the present invention.
  • a mixture of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, the binder constituting the easy-disassembly layer, and the heat-expandable microspheres is prepared.
  • an adhesive is applied onto the release sheets 32 and 34 to form the adhesive layers 20 and 21, and a binder and thermally expandable microspheres are formed on the release sheet 33.
  • the easily dismantled layer 10 is formed by applying the mixture.
  • the pressure-sensitive adhesive layer 21 is bonded to the other surface of the easy-disassembling layer 10 to obtain a double-sided pressure-sensitive adhesive tape according to the present invention.
  • the production of the double-sided pressure-sensitive adhesive tape is preferably carried out at a temperature of 80 ° C. or less, preferably 40 ° C. to 80 ° C., and preferably 50 ° C. to 80 ° C. in order to suppress the expansion of the thermally expandable microspheres. More preferably, it is carried out in the range of ° C.
  • the two pressure-sensitive adhesive layers 20 and 21 of the double-sided pressure-sensitive adhesive tape to be manufactured have the same configuration, the easy-disassembly layer and the pressure-sensitive adhesive layer are individually molded and bonded together.
  • the step of forming the pressure-sensitive adhesive layer may be performed once, and a double-sided pressure-sensitive adhesive tape can be produced efficiently.
  • adherends are bonded to each other with the double-sided pressure-sensitive adhesive tape of the present invention.
  • the easy-disassembly layer is heated to separate the adherends bonded together by the bonding method of the present invention.
  • FIG. 4 is an example of an embodiment of the bonding method of the present invention. As shown in FIG. 4, the adherends 50 and 51 are brought into contact with the pressure-sensitive adhesive layers 20 and 21 on both sides of the double-sided pressure-sensitive adhesive tape, and the adherends are bonded and bonded together.
  • FIG. 5 is an example of an embodiment of the separation method according to the present invention.
  • the double-sided adhesive tape is heated. You may heat a double-sided adhesive tape by heating the said adherend and the whole double-sided adhesive tape which were bonded together. Then, the binder 11 of the easily dismantled layer 10 is softened by heat, and the thermally expandable microspheres 12 expand. At this time, a peeling stress is applied to the double-sided pressure-sensitive adhesive tape by applying force to the double-sided pressure-sensitive adhesive tape in a direction in which the adherends 50 and 51 are separated. Since the easily expandable layer of the double-sided pressure-sensitive adhesive tape of the present invention contains thermally expandable microspheres, the adherends can be easily separated from each other when it expands due to heating or the like.
  • FIG. 6 is a diagram schematically showing an example of a state of separation of adherends in the separation method of the present invention and another method.
  • FIG. 6A is an example of the separation method of the present invention, and shows a case where the heat-expandable microspheres 12 are contained in the easy-disassembly layer 10 of the double-sided pressure-sensitive adhesive tape.
  • FIG. 6B shows a case where the heat-expandable microspheres 12 are not contained in the easy-disassembly layer 10 of the double-sided pressure-sensitive adhesive tape.
  • the heat-expandable microspheres 12 are contained in the easy-disassembly layer 10 of the double-sided pressure-sensitive adhesive tape, as shown in FIG.
  • the easily dismantled layer can be disassembled with less force, and as a result, two or more easily.
  • the adherend can be separated.
  • the heating performed by the separation method can be appropriately selected depending on the thermally expandable microspheres used and the working environment, but is preferably 85 ° C to 150 ° C, more preferably 90 ° C to 120 ° C.
  • the double-sided pressure-sensitive adhesive tape of the present invention can firmly adhere to adherends without being disassembled in a normal use environment (approximately 80 ° C. or lower), while being heated to the above temperature.
  • the easily dismantled layer can be easily disassembled, and as a result, the adherend can be easily separated.
  • Examples of the heating method include a method of directly or indirectly heating the double-sided pressure-sensitive adhesive tape using a dryer or a halogen lamp.
  • a halogen lamp may be brought close to or in contact with the double-sided pressure-sensitive adhesive tape, or the pressure-sensitive adhesive tape may be indirectly heated by bringing a halogen lamp close to or in contact with the adherend.
  • a halogen lamp may approach or contact the end of the double-sided pressure-sensitive adhesive tape.
  • heating step it is preferable to use a heating device equipped with a halogen lamp or the like and heat the double-sided pressure-sensitive adhesive tape until the temperature reaches 80 ° C. to 130 ° C., more preferably 85 ° C. to 125 ° C.
  • heating is performed until 90 ° C to 120 ° C.
  • the heating is preferably within 20 seconds, more preferably within 15 seconds, and further preferably within a relatively short period of time within 10 seconds.
  • the heating step using the halogen lamp or the dryer is a step of setting the temperature of the double-sided pressure-sensitive adhesive tape to 100 ° C. within 20 seconds, so that the disassembly efficiency of the article can be improved and This is preferable because deformation of the body due to heat can be prevented.
  • a heating device equipped with a halogen lamp for example, a “parallel light type halogen lamp heater” capable of heating a certain area in a short time, a condensing halogen type lamp capable of local heating, or the like may be used.
  • a parallel light type halogen lamp heater can heat a wide range at a time, so that the heating time can be shortened to the time described above.
  • the area that the parallel light halogen lamp heater can heat at a time is preferably about 10 cm 2 to 500 cm 2 .
  • the heating device such as a parallel light type halogen lamp heater has a portable size and weight in order to improve the efficiency of the work for disassembling the article.
  • the weight is preferably 3 kg or less, preferably 2 kg or less, and more preferably 0.1 kg to 1 kg.
  • the article heated by the above method can be easily disassembled by applying little or no force to two or more adherends constituting the article.
  • the double-sided pressure-sensitive adhesive tape of the present invention has a very excellent adhesive force in a temperature range of 60 ° C. or lower, a transparent top plate constituting an electronic device such as a copying machine or a multifunction machine having a copy function or a scan function, for example And can be used for fixing to the casing.
  • the transparent top plate it is possible to use a transparent top plate installed in a copying machine or a multifunction machine equipped with a general copy function or scan function.
  • the transparent top plate for example, a transparent plate-like rigid body made of glass or plastic can be used.
  • a transparent plate-like rigid body made of glass or plastic
  • plastic an acrylic board, a polycarbonate board, etc. can be used, for example.
  • a plate suitable for the shape of the copying machine or the like on which it is installed can be used, but it is usually preferable to use a plate having a square or rectangular shape.
  • the double-sided pressure-sensitive adhesive tape is, for example, a rectangular transparent top plate
  • the double-sided pressure-sensitive adhesive tape is affixed along the ends of two opposing sides.
  • the adhesive tape can be cut into a cover corresponding to the length of the side of the transparent top plate.
  • the width is 0.5 mm to 20 mm and the length is 0.1 mm to 2. It is preferable to use one that is 0 mm.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be used exclusively for fixing members constituting portable electronic devices.
  • the member include two or more casings or lens members constituting an electronic device.
  • Examples of the portable electronic device include those having a structure in which a case and one of a lens member and other cases are joined via the double-sided adhesive tape as the member.
  • the fixing of the member includes, for example, a method in which one of the casing or the lens member and the other casing or the lens member are laminated via the double-sided adhesive tape and then cured for a certain period.
  • FIG. 7 is an example of an embodiment of the separation method according to the present invention.
  • the separation method as shown in FIG. 6 is performed.
  • the residue of the double-sided adhesive tape that has been disassembled remains on the adherends 50 and 51.
  • the double-sided adhesive tape is cooled. Thereafter, by pulling the base film 41 portion, the entire residue of the double-sided pressure-sensitive adhesive tape can be peeled off from the adherend while the base film and the other layers of the double-sided pressure-sensitive adhesive tape are integrated.
  • Cooling may be suitably cooled to a temperature at which the degree of softening of the binder in the residue of the double-sided pressure-sensitive adhesive tape softened by heating is reduced, and the residue of the double-sided pressure-sensitive adhesive tape is removed and becomes easy to handle, and is 35 ° C. or lower.
  • the temperature is preferably 25 ° C. or lower.
  • the mass proportion of polystyrene units in the whole styrene-isoprene block copolymer is 15 mass%, the mass proportion of polyisoprene units is 85 mass%), 100 mass parts, C5 petroleum-based tackifying resin (softening point 100 ° C, several 40 parts by mass of average molecular weight 885), 30 parts by mass of polymerized rosin ester-based tackifier resin (softening point 125 ° C., number average molecular weight 880), HV-100 (manufactured by JX Nippon Mining & Metals Corporation, low 5 parts by weight of molecular weight polybutene), Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) as thermally expandable microspheres A thermal expansion coefficient at 120 ° C.
  • a synthetic rubber solution was obtained by dissolving in toluene.
  • the easy-disassembly layer (1) was manufactured by applying the solution to the surface of the release sheet using an applicator so that the thickness after drying was 40 ⁇ m and drying at 85 ° C. for 5 minutes.
  • Easy dismantling layer (9) 100 parts by mass of LA2250 (manufactured by Kuraray Co., Ltd., acrylic thermoplastic elastomer), Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd., thermal expansion coefficient at 120 ° C. is 370%, and expansion start temperature is 90 ° C. to 100 ° C.
  • An acrylic resin composition having a non-volatile content of 40% by mass was obtained by mixing 10 parts by mass of 10 ° C., a maximum expansion temperature of 125 ° C. to 135 ° C. and a particle size (before expansion) of 9 ⁇ m to 15 ⁇ m) and toluene.
  • the easy-disassembly layer (9) was manufactured by applying the acrylic resin composition to the surface of the release sheet using an applicator so that the thickness after drying was 40 ⁇ m and drying at 85 ° C. for 5 minutes.
  • an acrylic copolymer solution having a weight average molecular weight of 800,000 was obtained.
  • 30 parts by mass of a polymerized rosin ester tackifier resin (softening point 125 ° C., number average molecular weight 880) is added to 100 parts by mass of the acrylic copolymer, and ethyl acetate is added and mixed.
  • An acrylic copolymer composition (1) having a nonvolatile content of 45% by mass was obtained.
  • particle size (before expansion) 9 ⁇ m ⁇ 15 ⁇ m) 10 parts by weight of the mixture was applied to the surface of the release sheet using an applicator so that the thickness after drying was 40 ⁇ m, and dried at 85 ° C. for 5 minutes to facilitate the dismantling layer ( 10) was formed.
  • Core layer (1) A core layer (1) was produced in the same manner as in Production Example 1, except that Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was not used.
  • Core layer (2) A core layer (2) was produced in the same manner as in Production Example 9 except that Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was not used.
  • Middle core layer (3) A core layer (3) was produced in the same manner as in Production Example 10 except that Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was not used.
  • Middle core layer (4) A core layer (4) was produced in the same manner as in Production Example 11 except that Matsumoto Microsphere F-48 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was not used.
  • Adhesive layer (1) In a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, 44.9 parts by mass of butyl acrylate, 50 parts by mass of 2-ethylhexyl acrylate, 2 parts by mass of acrylic acid, 3 parts by mass of vinyl acetate , 0.1 part by weight of 4-hydroxybutyl acrylate and 0.1 part by weight of 2,2′-azobisisobutylnitrile as a polymerization initiator are dissolved in 100 parts by weight of ethyl acetate and polymerized at 70 ° C. for 10 hours.
  • an acrylic copolymer solution having a weight average molecular weight of 800,000 was obtained.
  • 30 parts by mass of a polymerized rosin ester tackifier resin (softening point 125 ° C., number average molecular weight 880) is added to 100 parts by mass of the acrylic copolymer, and ethyl acetate is added and mixed.
  • An acrylic copolymer composition (1) having a nonvolatile content of 45% by mass was obtained.
  • Example 1 As shown in FIG. 8A, the pressure-sensitive adhesive layer (1) 22 was bonded to a polyethylene terephthalate film 42 having a thickness of 16 ⁇ m (bonded product).
  • Example 2 A double-sided pressure-sensitive adhesive tape of Example 2 was produced in the same manner as in Example 1 except that the easy-disintegration layer (2) was used instead of the easy-disassembly layer (1).
  • Example 3 A double-sided pressure-sensitive adhesive tape of Example 3 was produced in the same manner as in Example 1 except that the easy-disintegration layer (3) was used instead of the easy-disassembly layer (1).
  • Example 4 A double-sided pressure-sensitive adhesive tape of Example 4 was produced in the same manner as in Example 1 except that the easy-disassembly layer (4) was used instead of the easy-disassembly layer (1).
  • Example 5 A double-sided pressure-sensitive adhesive tape of Example 5 was produced in the same manner as in Example 1 except that the easy-disassembly layer (5) was used instead of the easy-disassembly layer (1).
  • Example 6 (Example 6) Implemented except that instead of the 16 ⁇ m polyethylene terephthalate film on one side, a laminate of a 16 ⁇ m thick polyethylene terephthalate film and a 100 ⁇ m thick polyolefin foam was used so that the foam side was in contact with the easily disintegrable layer. In the same manner as in Example 1, the double-sided pressure-sensitive adhesive tape of Example 6 was produced.
  • Example 7 A double-sided pressure-sensitive adhesive tape of Example 7 was produced in the same manner as in Example 1 except that the easy-disassembly layer (6) was used instead of the easy-disassembly layer (1).
  • Example 8 A double-sided pressure-sensitive adhesive tape of Example 8 was produced in the same manner as in Example 1 except that the easy-disintegration layer (7) was used instead of the easy-disassembly layer (1).
  • Example 9 A double-sided pressure-sensitive adhesive tape of Example 9 was produced in the same manner as in Example 1 except that the easy-disassembly layer (8) was used instead of the easy-disassembly layer (1).
  • Example 10 A double-sided pressure-sensitive adhesive tape of Example 10 was produced in the same manner as in Example 1 except that the easy-disassembly layer (9) was used instead of the easy-disassembly layer (1).
  • Example 11 A double-sided pressure-sensitive adhesive tape of Example 11 was produced in the same manner as in Example 1 except that the easy-disintegration layer (10) was used instead of the easy-disassembly layer (1).
  • Example 12 A double-sided pressure-sensitive adhesive tape of Example 12 was produced in the same manner as in Example 1 except that the easy-disassembly layer (11) was used instead of the easy-disassembly layer (1).
  • Comparative Example 1 A double-sided pressure-sensitive adhesive tape of Comparative Example 1 was produced in the same manner as in Example 1 except that the core layer (1) was used in place of the easily dismantled layer (1).
  • Comparative Example 2 A double-sided pressure-sensitive adhesive tape of Comparative Example 2 was produced in the same manner as in Example 1 except that the core layer (2) was used in place of the easy-dismantling layer (1).
  • Comparative Example 3 A double-sided pressure-sensitive adhesive tape of Comparative Example 3 was produced in the same manner as in Example 1 except that the core layer (3) was used in place of the easily dismantled layer (1).
  • Comparative Example 4 A double-sided pressure-sensitive adhesive tape of Comparative Example 4 was produced in the same manner as in Example 1 except that the core layer (4) was used in place of the easily dismantled layer (1).
  • the release sheet on one side of the double-sided pressure-sensitive adhesive tape was peeled off, and the pressure-sensitive adhesive layer was lined with an aluminum foil having a thickness of 50 ⁇ m.
  • the backed adhesive tape was cut to a width of 20 mm, the release sheet on the other side was peeled off, and the adhesive layer was bonded to the smooth surface of the SUS plate that had been degreased to obtain a test piece.
  • test piece was allowed to stand for 30 minutes in an environment of 23 ° C., and in that environment, a tensilon tensile tester [manufactured by A & D Co., Ltd., model: RTM-100] was used to form a double-sided adhesive tape constituting the test piece.
  • the adhesive strength when peeled from the SUS plate at a speed of 300 mm / min in the direction of 180 degrees was measured.
  • the release sheet on one side of the double-sided pressure-sensitive adhesive tape was peeled off, and the pressure-sensitive adhesive layer was lined with an aluminum foil having a thickness of 50 ⁇ m.
  • the backed adhesive tape was cut to a width of 20 mm, the release sheet on the other side was peeled off, and the adhesive layer was bonded to the smooth surface of the SUS plate that had been degreased to obtain a test piece.
  • test piece was allowed to stand for 30 minutes in a 120 ° C. environment, and in that environment, a tensilon tensile tester [manufactured by A & D Co., Ltd., model: RTM-100] was used to form a double-sided adhesive tape constituting the test piece.
  • the adhesive strength when peeled from the SUS plate at a speed of 300 mm / min in the direction of 180 degrees was measured.
  • FIG. 9 is a diagram for explaining a method of dismantling test.
  • the double-sided pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples were cut into a square shape having a side (outer shape) length of 20 mm.
  • the cut double-sided adhesive tape 202 was affixed to a degreased smooth surface of an SUS plate 201 having a length of 100 mm, a width of 30 mm, and a thickness of 1 mm.
  • the degreased smooth surface of the SUS plate 201 ′ was applied to the surface opposite to the surface where the double-sided adhesive tape 202 and the SUS plate 201 were applied, and one reciprocating pressure was applied with a 5 kg load roller. A test piece was obtained.
  • the prepared test piece which was left in an environment of 120 ° C. for 30 minutes, was taken out at 23 ° C., and the SUS plate when both ends of the SUS plates 201 and 201 ′ were held by hand and peeled off vertically within 15 seconds. The ease of separation was evaluated.
  • a test piece composed of a binder layer having a thickness of 2 mm was prepared by overlapping the binder layers obtained using the same binder.
  • a parallel plate having a diameter of 7.9 mm was attached to a viscoelasticity tester (ARES 2kSTD) manufactured by TA Instruments Japan.
  • the test piece is sandwiched between the parallel plates with a compression load of 50 g, and a storage elastic modulus (G 23) at 23 ° C. under the conditions of a frequency of 1 Hz, a temperature range of ⁇ 60 to 150 ° C., and a heating rate of 2 ° C./min. ) And storage elastic modulus (G 120 ) at 120 ° C. was measured.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)

Abstract

Le problème de la présente invention concerne un ruban adhésif double face, qui peut être utilisé pour l'application sur un substrat et pour l'apposition de deux substrats ou plus et qui permet une séparation facile lors de la séparation desdits deux substrats ou plus. La présente invention concerne un ruban adhésif double face, caractérisé en ce qu'il possède une couche adhésive, directement ou par l'intermédiaire d'une autre couche intermédiaire, sur les deux côtés d'une couche de séparation facile, contenant un liant et des microsphères thermoexpansibles. La présente invention concerne également un objet caractérisé en ce qu'il présente une configuration dans laquelle deux substrats ou plus sont collés par l'utilisation dudit ruban adhésif double face.
PCT/JP2015/080553 2014-11-13 2015-10-29 Ruban adhésif double face, objet et procédé de séparation Ceased WO2016076131A1 (fr)

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JP2016558977A JP6120123B2 (ja) 2014-11-13 2015-10-29 両面粘着テープ、物品及び分離方法
CN201580056803.1A CN107075323A (zh) 2014-11-13 2015-10-29 双面粘胶带、物品及分离方法

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JPWO2018181769A1 (ja) * 2017-03-31 2020-02-13 リンテック株式会社 粘着シート
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