WO2022181656A1 - 粘着層付弾性シート及びそれを用いた可撓性ディスプレイ装置 - Google Patents

粘着層付弾性シート及びそれを用いた可撓性ディスプレイ装置 Download PDF

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Publication number
WO2022181656A1
WO2022181656A1 PCT/JP2022/007470 JP2022007470W WO2022181656A1 WO 2022181656 A1 WO2022181656 A1 WO 2022181656A1 JP 2022007470 W JP2022007470 W JP 2022007470W WO 2022181656 A1 WO2022181656 A1 WO 2022181656A1
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Prior art keywords
layer
adhesive layer
elastic
adhesive
mpa
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Ceased
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PCT/JP2022/007470
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English (en)
French (fr)
Japanese (ja)
Inventor
翔 英
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2023502463A priority Critical patent/JPWO2022181656A1/ja
Priority to KR1020237028053A priority patent/KR20230151998A/ko
Priority to CN202280015843.1A priority patent/CN117062887A/zh
Publication of WO2022181656A1 publication Critical patent/WO2022181656A1/ja
Anticipated expiration legal-status Critical
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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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature

Definitions

  • the present disclosure relates to an adhesive layer-attached elastic sheet and a flexible display device, and more specifically, to an adhesive layer-attached elastic sheet including an elastic layer and an adhesive layer, and a flexible display device using the same.
  • the optical film, etc. provided on the front side of the display may cause defects in appearance.
  • a pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer in which the occurrence of lifting and peeling is suppressed even in a high-temperature environment has been investigated (see Patent Document 1).
  • An object of the present disclosure is to provide an adhesive layer-attached elastic sheet capable of suppressing the occurrence of wrinkles in a bent portion when a display or the like is bent with a very small bending radius, and a flexible display device using the same. to do.
  • An elastic sheet with an adhesive layer includes an elastic layer having a tensile modulus of elasticity of 80 MPa or more and less than 1500 MPa at 20°C and a modulus of elasticity in tension of 40 MPa or more and less than 1000 MPa at 85°C; and an adhesive layer overlying the layers.
  • the thickness of the adhesive layer is 2 ⁇ m or more and 15 ⁇ m or less.
  • the adhesive layer has an adhesive strength of 10 N/25 mm or more to the polyethylene terephthalate film.
  • the elastic sheet with an adhesive layer is attached to the front side of a flexible display.
  • FIG. 1 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to one embodiment of the present disclosure.
  • FIG. 2 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to another embodiment of the present disclosure.
  • FIG. 3 is a schematic cross-sectional view of an elastic sheet with an adhesive layer according to another embodiment of the present disclosure.
  • the adhesive layer-attached elastic sheet (hereinafter also referred to as elastic sheet 1) according to the present embodiment has a tensile modulus of elasticity of 80 MPa or more and less than 1500 MPa at 20°C and a tensile modulus of elasticity of 40 MPa or more and less than 1000 MPa at 85°C.
  • a body layer and an adhesive layer overlapping the elastic layer are provided.
  • the thickness of the adhesive layer is 2 ⁇ m or more and 15 ⁇ m or less.
  • the adhesive layer has an adhesive strength of 10 N/25 mm or more to the polyethylene terephthalate film.
  • a bendable display when a thin film such as polyethylene terephthalate or polyimide placed on the front side of the display (the display surface side of the display) is bent, the tensile stress and the compressive stress concentrate at the same time, and the thin film Structural deformation and peeling of films and the like occur, and wrinkles occur.
  • the present inventors arranged an elastic sheet with an adhesive layer around the thin film or the like to reduce tensile stress and compressive stress in bending, thereby suppressing structural deformation and peeling of the thin film or the like. , it was found that the occurrence of wrinkles can be suppressed.
  • the present inventors also found that there is a relationship between the relaxation of tensile stress and compressive stress and the tensile elastic modulus of the elastic layer of the elastic sheet 1 . That is, if the tensile modulus is 80 MPa or more and less than 1500 MPa at 20° C. and 40 MPa or more and less than 1000 MPa at 85° C., the stress during bending can be well dispersed under each temperature condition. It is believed that tensile stress and compressive stress can be sufficiently relieved. If the tensile elastic modulus is outside the above range at either one of 20°C and 85°C, there is a possibility that tensile stress and compressive stress cannot be sufficiently relaxed.
  • the adhesive layer of the elastic sheet 1 needs to have a thickness of 2 ⁇ m or more and 15 ⁇ m or less and an adhesive force to the polyethylene terephthalate film of 10 N/25 mm or more. . If the thickness of the adhesive layer is less than 2 ⁇ m, peeling may occur in the adhesive layer, and if it exceeds 15 ⁇ m, structural deformation of the flexible adhesive layer may occur. If the adhesive strength is less than 10 N/25 mm, the adhesive layer may peel off. By satisfying all of these, the elastic sheet 1 can suppress the generation of wrinkles at a bending portion with a severe radius of curvature up to ⁇ 1.5 mm, for example. As described above, according to the present disclosure, it is possible to provide an adhesive layer-attached elastic sheet that can suppress the occurrence of wrinkles at the bent portion when bent with a very small bending radius by being used for a display or the like. can.
  • FIG. 1 shows an example of the elastic sheet of this embodiment.
  • the elastic sheet 1 of FIG. 1 includes an elastic layer 2 and an adhesive layer 3 directly overlapping the elastic layer 2 .
  • the elastic layer 2 has a tensile modulus of 80 MPa or more and less than 1500 MPa at 20°C and 40 MPa or more and less than 1000 MPa at 85°C.
  • the tensile modulus at 20° C. is preferably 100 MPa or more, more preferably 150 MPa or more, still more preferably 200 MPa or more, and particularly preferably 300 MPa or more.
  • the tensile modulus at 20° C. is preferably 1450 MPa or less, more preferably 1400 MPa or less, even more preferably 1350 MPa or less, and particularly preferably 1300 MPa or less.
  • the tensile modulus at 85° C. is preferably 900 MPa or less, more preferably 800 MPa or less, and even more preferably 700 MPa or less.
  • the elastic sheet 1 may have one elastic layer 2 or two or more layers, but usually has one layer.
  • the shape of the elastic layer 2 is, for example, film-like, sheet-like, or plate-like.
  • the tensile elastic modulus of the elastic layer 2 is a value measured by performing a dynamic viscoelasticity test.
  • a test piece is prepared from the elastic layer 2, and the tensile modulus (MPa) is measured at 20°C and 85°C under the conditions of a frequency of 10 Hz and a heating rate of 5°C/min.
  • MPa tensile modulus
  • the flexural modulus of the material forming the elastic layer 2 is preferably 100 MPa or more and 2500 MPa or less. In this case, tensile stress and compressive stress can be more relaxed, and as a result, the occurrence of wrinkles can be further suppressed.
  • the bending elastic modulus is more preferably 300 MPa or more, further preferably 500 MPa or more, and particularly preferably 650 MPa or more.
  • the bending elastic modulus is more preferably 2300 MPa or less, further preferably 2100 MPa or less, and particularly preferably 1500 MPa or less.
  • the flexural modulus of the material forming the elastic layer 2 is a value measured in accordance with JIS-K7171 under conditions of an indenter radius of 5 mm and a compression rate of 2 mm/min. A method for measuring the flexural modulus will be described in the Examples section below.
  • the thickness of the elastic layer 2 is preferably 30 ⁇ m or more. In this case, the stress relaxation ability is further improved, and the occurrence of wrinkles can be further suppressed. This thickness is more preferably 40 ⁇ m or more, and even more preferably 50 ⁇ m or more.
  • the thickness of the elastic layer 2 is preferably 290 ⁇ m or less. In this case, the thickness of the elastic sheet 1 can be further reduced. This thickness is more preferably 200 ⁇ m or less, and even more preferably 100 ⁇ m or less.
  • the material constituting the elastic layer 2 is not particularly limited as long as the elastic modulus in tension of the elastic layer 2 is within the above range, and examples thereof include the following elastomers.
  • elastomers examples include acrylic elastomers, urethane elastomers, olefin elastomers, amide elastomers, styrene elastomers, and ester elastomers.
  • acrylic elastomers include copolymers in which the hard segment contains (meth)acrylic acid ester units and the soft segment contains acrylonitrile units, ethylene units, (meth)acrylic acid ester units, and the like.
  • the (meth)acrylic acid ester unit includes both an acrylic acid ester unit and a methacrylic acid ester unit.
  • urethane-based elastomers include copolymers in which the hard segment includes a polyurethane structure and the soft segment includes a polyester structure, polyether structure, polycaprolactone structure, or the like.
  • olefinic elastomer for example, a polymer alloy obtained by finely dispersing an olefinic rubber such as an ethylene/propylene rubber or an ethylene/propylene/diene terpolymer in a matrix of an olefinic resin such as polypropylene or polyethylene; contains a polybutadiene structure, and the soft segment contains a polyether structure, a polyester structure, or the like.
  • amide-based elastomers include copolymers in which the hard segment contains a polyamide structure and the soft segment contains a polyether structure, polyester structure, or the like.
  • styrene-based elastomers include copolymers in which the hard segment contains styrene units and the soft segment contains butadiene units or hydrogenated butadiene units, or isoprene units or hydrogenated isoprene units.
  • ester-based elastomers include copolymers in which the hard segment contains a polyester structure and the soft segment contains a polyether structure, polyester structure, or the like.
  • the material constituting the elastic layer 2 preferably contains an elastomer, and preferably contains an acrylic elastomer from the viewpoint of adhesiveness, transparency and weather resistance.
  • Examples of the (meth)acrylic acid ester units of the acrylic elastomer include methyl (meth)acrylate units; ethyl (meth)acrylate units; n-propyl (meth)acrylate units, iso-propyl (meth)acrylate units and other propyl ( meth)acrylate units; butyl (meth)acrylate units such as n-butyl (meth)acrylate units, iso-butyl (meth)acrylate units, sec-butyl (meth)acrylate units, tert-butyl (meth)acrylate units; pentyl (Meth) acrylate units; hexyl (meth) acrylate units; cyclohexyl (meth) acrylate units; heptyl (meth) acrylate units; ) acrylate unit; nonyl (meth) acrylate unit; decyl (meth) acrylate unit; undecyl (meth) acrylate unit
  • the acrylic elastomer may have units derived from other monomers in addition to the (meth)acrylic acid ester units.
  • Other monomers include, for example, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate; glycerin di(meth)acrylate, glycidyl (meth)acrylate, 2-(meth)acryloyloxyethyl isocyanate, ( meth)acrylic acid, itaconic acid, maleic anhydride, crotonic acid, maleic acid, fumaric acid and the like.
  • the monomer that provides the hard segment of the acrylic elastomer preferably has a homopolymer glass transition temperature (Tg) of 60°C or higher.
  • the monomer that provides the soft segment of the acrylic elastomer preferably has a homopolymer Tg of -10°C or lower.
  • Monomers whose homopolymer Tg is 60° C. or higher include, for example, methyl methacrylate, cyclohexyl methacrylate, and isobornyl methacrylate.
  • n-butyl acrylate 2-ethylhexyl acrylate, isooctyl acrylate, n-octyl acrylate, isononyl acrylate, lauryl methacrylate and the like.
  • the ratio of the units constituting the hard segment to the total units of the acrylic elastomer is preferably 5% by mass or more, more preferably 20% by mass or more, further preferably 40% by mass or more, and 50% by mass or more. % by mass or more is particularly preferred. This proportion is preferably 95% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, and particularly preferably 75% by mass or less.
  • the acrylic elastomer preferably contains a resin having a butyl acrylate unit and a methyl methacrylate unit from the viewpoint of superior adhesiveness, transparency, and weather resistance, the soft segment containing the butyl acrylate unit, and the hard segment containing methyl methacrylate. It more preferably contains a block copolymer containing units, and more preferably contains a triblock copolymer composed of a methyl methacrylate block-butyl acrylate block-methyl methacrylate block.
  • the ratio of butyl acrylate units to all units of the resin is preferably 10% by mass or more and 60% by mass or less, more preferably 25% by mass or more and 50% by mass or less.
  • the ratio of methyl methacrylate units to all units of the resin is preferably 40% by mass or more and 90% by mass or less, more preferably 50% by mass or more and 75% by mass or less.
  • acrylic elastomers include Clarity LA4286, LA2250 and LA2270 manufactured by Kuraray Co., Ltd., for example.
  • the method of forming the elastic layer 2 is not particularly limited. Examples include a method of obtaining a film by molding by a die method, an inflation film forming method, or the like.
  • the adhesive layer 3 is placed over the elastic layer 2 .
  • the elastic sheet 1 may have one adhesive layer 3, two layers, or three or more layers.
  • the shape of the adhesive layer 3 is, for example, film-like, sheet-like, or plate-like.
  • the thickness of the adhesive layer 3 is 2 ⁇ m or more and 15 ⁇ m or less.
  • the thickness of the adhesive layer 3 is preferably 4 ⁇ m or more, more preferably 6 ⁇ m or more, still more preferably 8 ⁇ m or more, and particularly preferably 9 ⁇ m or more. In this case, the stress relaxation ability of the elastic sheet 1 is further improved, and as a result, the occurrence of wrinkles can be further suppressed.
  • the thickness of the adhesive layer 3 is preferably 12 ⁇ m or less, more preferably 10 ⁇ m or less.
  • the thickness of the adhesive layer 3 refers to the thickness of one adhesive layer.
  • the adhesive strength of the adhesive layer 3 to the polyethylene terephthalate film is 10 N/25 mm or more.
  • the adhesive strength is preferably 12 N/25 mm or more, more preferably 14 N/25 mm or more, and even more preferably 15 N/25 mm or more. In this case, the occurrence of wrinkles can be further suppressed.
  • the adhesive layer 3 can be formed, for example, from an adhesive. Any adhesive can be used without particular limitation as long as the adhesive strength of the adhesive layer 3 to the polyethylene terephthalate film can be within the above range.
  • adhesives examples include acrylic adhesives, urethane adhesives, and polyester adhesives.
  • the adhesive preferably contains an acrylic adhesive from the viewpoint of increasing the adhesive strength.
  • acrylic adhesives examples include methyl (meth) acrylate; ethyl (meth) acrylate; butyl (meth) acrylate such as n-butyl (meth) acrylate and iso-butyl (meth) acrylate; 2-ethylhexyl (meth) acrylate.
  • dodecyl (meth)acrylate alkyl (meth)acrylates such as octadecyl (meth)acrylate; hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate; methoxyethyl (meth)acrylate, butoxymethyl (meth)acrylate alkoxyalkyl (meth)acrylates such as; cyclohexyl (meth)acrylate, phenyl (meth)acrylate, benzyl (meth)acrylate, vinyl acetate; (meth)acrylamides such as (meth)acrylamide and N-methylol (meth)acrylamide; styrene , acrylonitrile, vinylpyridine, vinylpyrrolidone, vinylalkyl ether, and the like.
  • the method of forming the adhesive layer 3 is not particularly limited, but for example, a method of applying an adhesive to the surface of the elastic layer 2 to form it, or a method of co-extrusion of the material constituting the elastic layer 2 and an adhesive. and methods to do so.
  • the elastic sheet 1 may include other layers in addition to the elastic layer 2 and the adhesive layer 3 .
  • the elastic sheet 1 may comprise one or more other layers.
  • the shape of other layers is, for example, film-like, sheet-like, or plate-like.
  • the elastic sheet 1 may include, as another layer, a shock absorbing layer 5 for absorbing shock and vibration between the elastic layer 2 and the adhesive layer 3, for example.
  • the elastic sheet 1 may also include a protective layer such as a separator on the side of the adhesive layer 3 opposite to the elastic layer 2 as another layer.
  • Examples of the layer structure of the adhesive layer-attached elastic sheet according to the present embodiment include the following (a) to (l).
  • the notation of A/B/C indicates that layers are laminated in order of A, B, and C from the front surface of the display device, for example.
  • Adhesive layer/elastic layer Adhesive layer/elastic layer
  • Adhesive layer/elastic layer/adhesive layer Adhesive layer/shock absorbing layer/elastic layer/adhesive layer
  • Adhesive layer/shock-absorbing layer/elastic layer/shock-absorbing layer Adhesive layer/shock-absorbing layer/elastic layer/shock-absorbing layer/adhesive layer
  • Adhesive layer/shock-absorbing layer/elastic layer/shock-absorbing layer/adhesive layer Adhesive layer/shock-absorbing layer/elastic layer/shock-absorbing layer/adhesive layer
  • g) Separator/adhesive layer/elastic layer Separator/Adhesive layer/Elastic layer/Adhesive layer/Separator
  • FIG. 2 shows an elastic sheet with an adhesive layer having the layer structure (h).
  • FIG. 3 shows an elastic sheet with an adhesive layer having the layer structure (j).
  • the total thickness of the elastic layer 2 and the adhesive layer 3 in the elastic sheet 1 is preferably 50 ⁇ m or more. In this case, the stress relaxation ability of the elastic sheet 1 can be further improved, and as a result, the occurrence of wrinkles can be further suppressed.
  • This thickness is more preferably 60 ⁇ m or more, and even more preferably 70 ⁇ m or more. This sum is preferably less than or equal to 300 ⁇ m. In this case, it is possible to further reduce the thickness of the display device including the display. More preferably, the total is 200 ⁇ m or less, and even more preferably 100 ⁇ m or less.
  • the thickness of the elastic sheet 1 is preferably 50 ⁇ m or more. In this case, the strength of the elastic sheet 1 can be further improved. This thickness is more preferably 60 ⁇ m or more, and even more preferably 70 ⁇ m or more.
  • the thickness of the elastic sheet 1 is preferably 300 ⁇ m or less. In this case, it is possible to further reduce the thickness of the display device including the display. This thickness is more preferably 200 ⁇ m or less, and even more preferably 100 ⁇ m or less.
  • the elastic sheet 1 according to this embodiment can be suitably used for flexible displays.
  • the elastic sheet 1 is arranged on the front side of the flexible display, that is, it is preferably used by being attached to the front side of the flexible display. It is more preferable to be used by being directly laminated on a protective film, coating layer, or the like.
  • Materials constituting the elastic layer and the adhesive layer are as follows.
  • - Material of elastic layer Resin A Methyl methacrylate-n-butyl acrylate-methyl methacrylate triblock copolymer.
  • a mixed resin of methyl methacrylate-n-butyl acrylate-methyl methacrylate triblock copolymer and polymethyl methacrylate was obtained by dissolving pellets of Clarity (manufactured by Kuraray Co., Ltd.) product numbers LA4285, LA2250, and LA2270 and Dianal (manufactured by Mitsubishi Chemical Co., Ltd.) product number BR-87 in a solvent.
  • the adhesive layer 1 having the thickness shown in Table 1 was formed by applying a material for the adhesive layer (acrylic adhesive) to one surface of the elastic layer and drying it. Then, the adhesive layer having the thickness shown in Table 1 was formed by applying the acrylic adhesive to the surface of the elastic layer opposite to the adhesive layer 1 in the same manner as described above and drying it. Thus, an elastic sheet with an adhesive layer was produced.
  • Adhesive strength of the adhesive layer to the polyethylene terephthalate film was determined by attaching a polyethylene terephthalate film (thickness 25 ⁇ m, manufactured by Toyobo Co., Ltd., product number E5100) to the adhesive layer 1 of the elastic sheet with adhesive layer. Combined, a test piece with a width of 25 mm ⁇ length of 100 mm was prepared, and a method conforming to JIS-Z0237: 2009 "Adhesive tape/adhesive sheet test method" (bonding conditions: 2 kg roller 1 reciprocation, peeling speed: 300 mm / min , peeling angle: 180°) under an environment of 23°C.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Electroluminescent Light Sources (AREA)
  • Adhesive Tapes (AREA)
PCT/JP2022/007470 2021-02-25 2022-02-24 粘着層付弾性シート及びそれを用いた可撓性ディスプレイ装置 Ceased WO2022181656A1 (ja)

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JP2023502463A JPWO2022181656A1 (https=) 2021-02-25 2022-02-24
KR1020237028053A KR20230151998A (ko) 2021-02-25 2022-02-24 점착층 부가 탄성 시트 및 그것을 이용한 가요성 디스플레이장치
CN202280015843.1A CN117062887A (zh) 2021-02-25 2022-02-24 带粘合层的弹性片和使用其的挠性显示装置

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JP2021-029253 2021-02-25

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