WO2021220805A1 - フレキシブル積層体及び表示装置 - Google Patents

フレキシブル積層体及び表示装置 Download PDF

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Publication number
WO2021220805A1
WO2021220805A1 PCT/JP2021/015398 JP2021015398W WO2021220805A1 WO 2021220805 A1 WO2021220805 A1 WO 2021220805A1 JP 2021015398 W JP2021015398 W JP 2021015398W WO 2021220805 A1 WO2021220805 A1 WO 2021220805A1
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Prior art keywords
layer
film
touch sensor
resin
polarizing plate
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PCT/JP2021/015398
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English (en)
French (fr)
Japanese (ja)
Inventor
承柏 洪
▲ビョン▼▲フン▼ 宋
東輝 金
大山 姜
Original Assignee
住友化学株式会社
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Application filed by 住友化学株式会社 filed Critical 住友化学株式会社
Priority to CN202180030800.6A priority Critical patent/CN115461704A/zh
Priority to KR1020227031705A priority patent/KR20230002313A/ko
Publication of WO2021220805A1 publication Critical patent/WO2021220805A1/ja

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/1033—Laminated safety glass or glazing containing temporary protective coatings or layers
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10458—Polarization selective transmission
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10724—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyamide
    • 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
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens

Definitions

  • the present invention relates to a flexible laminate, and particularly to a flexible laminate having excellent impact resistance.
  • organic EL displays that use organic EL as a display element are rapidly becoming widespread.
  • the organic EL display integrated with the touch panel is operated by touching the surface of the display device. Depending on the type of operation, the surface may be struck as well as rubbed.
  • Organic EL displays are generally thin. Therefore, when performing the above operation, the display may be damaged, and the display device not only rubs against the surface but also abruptly in the vertical direction from the side to be visually recognized while maintaining flexibility. It is required to have a performance that can withstand the force applied to.
  • Patent Document 1 describes a display device with a touch panel in which a touch panel is mounted on the polarizing plate side of a display device in which a polarizing plate is laminated on a display panel via an antireflection layer or an adhesive layer. It has a polarizer and a film having a thickness of 35 ⁇ m or less laminated on the touch panel side of the polarizing element, and the contact angle of the surface of the film on the touch panel side is less than 60 °.
  • a display device with a touch panel is described (claim 1). This display device with a touch panel has a thin polarizing plate, suppresses peeling of the antireflection layer and the adhesive layer, and avoids deterioration of the visibility of the display device (paragraph [0017]).
  • Patent Document 2 describes a polyimide-based film having a hard coat layer on one surface of a polyimide base material and a transparent electrode layer on the other surface.
  • This plastic substrate has excellent light transmission, satisfies high hardness, ITO processability, and flexibility, and when applied to a touch screen panel, functions as a window film and an electrode (). wrap up).
  • Patent Document 1 has only a configuration in which a thin film such as an acrylic resin is sandwiched above and below the polarizing element of the polarizing plate existing in the display device, and the laminate is located at the lower part of the laminate. Impact mitigation effect is poor.
  • the present invention solves the problem of the above-mentioned conventional laminated body, and an object of the present invention is a laminated body such as an organic EL layer and an organic EL panel while maintaining flexibility. It is to provide a flexible laminate capable of improving the impact mitigation effect on the substructure connected to.
  • the present invention is a flexible laminated body having a window film located on the side to be visually recognized, a polarizing plate, and a touch sensor layer, and further laminated on the touch sensor layer with a thickness of 10 to 100 ⁇ m.
  • a flexible laminate having a certain glass plate.
  • the flexible laminate has a window film located on the side to be visually recognized, a touch sensor layer, and a polarizing plate in this order.
  • the flexible laminate has a window film located on the side to be visually recognized, a polarizing plate, and a touch sensor layer in this order.
  • the flexible laminate is for an organic EL display device.
  • the present invention also provides an organic EL display device having an organic EL layer and any of the above flexible laminated bodies laminated on the visible side of the organic EL layer.
  • the organic EL display device is used when the operation of bending and stretching 180 ° with a bending radius of 3 mm with the window film located on the side to be visually recognized inside is repeated 100,000 times. It has bending resistance that does not cause cracks or breaks in the glass plate.
  • a flexible laminate having an improved impact mitigation effect on a lower structure connected to the laminate while maintaining flexibility.
  • FIG. 1 is a cross-sectional view showing an example of the structure of the flexible laminated body 100 of the present invention.
  • the flexible laminate 100 of FIG. 1 is a flexible laminate having a window film 10, a polarizing plate 40, and a touch sensor layer 30 located on the side to be visually recognized, and further covers the entire touch sensor layer 30. It has laminated glass plates having a thickness of 10 to 100 ⁇ m.
  • the flexible laminate 100 shown in FIG. 1A has a window film 10 located on the side to be visually recognized, a touch sensor layer 30 in which a glass plate 20 is laminated on the entire upper portion, and a polarizing plate 40 in this order.
  • the flexible laminate 100 shown in FIG. 1B has a window film 10 located on the side to be visually recognized, a touch sensor layer 30 in which a glass plate 20 is laminated on the entire lower portion, and a polarizing plate 40 in this order.
  • the flexible laminate 100 shown in FIG. 1C has a window film 10 located on the side to be visually recognized, a polarizing plate 40, and a touch sensor layer 30 in which a glass plate 20 is laminated on the entire upper portion in this order.
  • the flexible laminate 100 shown in FIG. 1D has a window film 10 located on the side to be visually recognized, a polarizing plate 40, and a touch sensor layer 30 in which a glass plate 20 is laminated on the entire lower portion in this order.
  • the window film 10 located on the side to be visually recognized, the touch sensor layer 30 in which the glass plate 20 is laminated on at least one of the entire upper portion or the entire lower portion, and the polarizing plate 40 are an adhesive layer or an adhesive layer described later. (Hereinafter, both are collectively referred to as an adhesive layer), and they are bonded to each other.
  • the adhesive layer is not shown for simplicity.
  • the flexible laminate 100 of FIGS. 1A to 1D is further connected to the lower structure 50 via an adhesive layer (not shown).
  • the window film 10 of the flexible laminate 100 constitutes a visible surface which is the uppermost portion of the flexible laminate 100.
  • the window film is a translucent plate-like layer.
  • the window film may be composed of two or more layers.
  • the window film include a resin plate (for example, a resin plate, a resin sheet, a resin film, etc.), a glass plate (for example, a glass plate, a glass film, etc.), or a resin plate. Examples thereof include a laminate of a body and a glass plate-like body.
  • the material may be, for example, an acrylic resin such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; and a polyolefin resin such as polyethylene, polypropylene, polymethylpentene and polystyrene.
  • Cellular resins such as triacetyl cellulose, acetyl cellulose butyrate, propionyl cellulose, butyryl cellulose and acetyl propionyl cellulose; polyvinyl chloride such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol and polyvinyl acetal Based resin; sulfone resin such as polysulfone and polyether sulfone; ketone resin such as polyether ketone and polyether ether ketone; polyetherimide; polycarbonate resin; polyester resin; polyimide resin; polyamideimide resin; and Examples thereof include polyamide resins.
  • polyvinyl chloride such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol and polyvinyl acetal Based resin
  • sulfone resin such as polysulfone and polyether s
  • resins can be used alone or in admixture of two or more. Above all, from the viewpoint of improving strength and transparency, it is preferable to use a polycarbonate resin, a polyester resin, a polyimide resin, a polyamide-imide resin, or a polyamide resin.
  • the window film 10 may be a film made of the above resin, and may have a hard coat layer on at least one surface of the film.
  • the hard coat layer may be formed on the outer surface of the film or may be formed on both sides.
  • the hard coat layer is, for example, a cured layer of an ultraviolet curable resin.
  • the ultraviolet curable resin include acrylic resin, silicone resin, polyester resin, urethane resin, amide resin, epoxy resin and the like.
  • the hard coat layer may contain additives to improve hardness.
  • the additive is not particularly limited as long as it does not inhibit the translucency of the window film, and inorganic fine particles, organic fine particles, or a mixture thereof can be used.
  • the glass plate-like body can be formed from the same material as the glass plate 20 described later.
  • the window film may further have a function as a touch sensor, a blue light cut function, a viewing angle adjusting function, and the like.
  • the thickness of the window film is, for example, 3 to 100 ⁇ m, preferably 5 to 70 ⁇ m, and more preferably 10 to 60 ⁇ m.
  • the glass plate 20 of the flexible laminate 100 is laminated on at least one of the entire upper portion or the entire lower portion of the touch sensor layer 30.
  • the whole means a substantially entire surface covering the bent portion and the touch sensory region of the touch sensor layer 30.
  • the glass plate to be used it is preferable to use chemically strengthened glass having excellent strength and translucency in light of the object of the present invention. By using chemically tempered glass, it is possible to improve the impact resistance of the laminated body while maintaining flexibility.
  • the glass plates are laminated as close as possible to the lower structure 50. By doing so, the impact resistance of the obtained display device is improved. From this point of view, among the embodiments shown in FIGS. 1A to 1D, those of FIGS. 1C and 1D are preferable.
  • Chemically tempered glass suitable for the glass plate 20 can be obtained by chemical ion exchange treatment of glass.
  • the strength of the glass surface can be improved by partially replacing the sodium ions and lithium ions on the glass surface with potassium ions having a larger ionic radius by the chemical ion exchange treatment.
  • the formation of a thin compressive stress layer improves the surface strength.
  • the glass used for chemically strengthened glass include aluminum nosilicate glass, soda lime glass, borosilicate glass, lead glass, alkali barium glass, and aluminoborosilicate glass.
  • the chemical ion exchange treatment can be performed by immersing the glass in an ion replacement solution heated to a temperature higher than the melting point or by directly applying a paste-like ion replacement solution to the glass.
  • the ion substitution solution include those based on potassium nitrate, potassium carbonate, potassium hydrogen carbonate, potassium phosphate, potassium sulfate and potassium hydroxide.
  • potassium nitrate 330 ° C. is preferable because it has a melting point lower than the melting point of glass (usually 500 ° C. to 600 ° C.) and is easy to handle.
  • the glass may be thinned by performing an etching treatment before the chemical ion exchange treatment.
  • the etching treatment can also be carried out using hydrofluoric acid or a mixture thereof as an aqueous ammonium fluoride solution and an organic acid such as formic acid, acetic acid, propionic acid and the like as a chemical treatment solution. Using these, etching can be performed by injection, dipping, or the like.
  • the etching treatment may be carried out using an inert gas containing fluorine as the etching gas, for example, He gas or Ar gas containing at least one of CF 4 , C 3 F 8 , C 2 F 6 , XeF 2 and the like. ..
  • the etching can be performed by turning an inert gas containing fluorine diluted with He gas or Ar gas into plasma under atmospheric pressure and releasing fluorine from carbon fluoride.
  • the thickness of the glass plate used for the flexible laminate 100 is, for example, 10 to 100 ⁇ m, preferably 20 to 80 ⁇ m, and more preferably 30 to 60 ⁇ m.
  • the thickness of the glass plate is 10 ⁇ m or more, the impact resistance of the flexible laminate 100 can be enhanced and the glass plate can be prevented from breaking.
  • the thickness of the glass plate is 100 ⁇ m or less, the flexibility of the flexible laminate can be increased.
  • the touch sensor layer 30 of the flexible laminated body 100 has a glass plate 20 laminated on at least one of the entire upper portion or the entire lower portion (FIG. 1).
  • the glass plate 20 and the touch sensor layer 30 are bonded to each other via an adhesive layer.
  • the touch sensor layer 30 may be formed directly on the glass plate 20 without interposing the adhesive layer.
  • the glass plate 20 is preferably bonded to the touch sensor layer 30 via an ultraviolet curable adhesive layer.
  • the touch sensor layer to which the glass plate is attached is further attached to at least one of the window film 10 and the polarizing plate 40 via the adhesive layer (not shown).
  • the touch sensor layer 30 has a transparent conductive layer.
  • the detection method of the touch sensor layer is not particularly limited as long as it can detect the touched position on the window film, and is, for example, a capacitance method, a resistance film method, or an optical sensor method. , Supersonic method, electromagnetic induction coupling method, surface acoustic wave method and the like can be appropriately selected. Above all, the capacitance method is preferable from the viewpoint of low cost, quick response, and thinning.
  • the touch sensor layer is composed of, for example, a base material, a transparent conductive layer for position detection formed on the base material, and a touch position detection circuit.
  • the transparent conductive layer is grounded through the capacitance of the human body at the touched point, and the touch position detection circuit detects the grounding of the transparent conductive layer to detect the touch position. be able to.
  • ITO indium tin oxide
  • the transparent conductive layer is preferably formed so as not to be visually recognized when the touch sensor layer is used for the laminated body.
  • the touch sensor layer may have a separation layer.
  • the separation layer can be a layer having a function of facilitating the separation of the transparent conductive layer from the base material in the manufacturing process of the touch sensor layer 30.
  • it is formed on a base material with an inorganic material layer such as a silicone oxide or an organic material layer such as a (meth) acrylic resin composition, an epoxy resin composition, or a polyimide resin composition, and is formed from the base material together with a transparent conductive layer. Can be separated.
  • the touch sensor layer may further include at least one protective layer in addition to or in place of the separation layer.
  • the protective layer can be provided in contact with the transparent conductive layer to support the transparent conductive layer. Like the separation layer, it is formed on the base material and is a layer located between the base material and the transparent conductive layer.
  • the protective layer contains at least one of an organic insulating film and an inorganic insulating film, and these films can be formed by a spin coating method, a sputtering method, a vapor deposition method, or the like.
  • the touch sensor layer can be manufactured by the following method.
  • a separation layer is formed on the base material, and if necessary, a protective layer is further formed on the separation layer.
  • a transparent conductive layer patterned by photolithography is formed on the separation layer or the protective layer, and a peelable protective film is laminated on the transparent conductive layer to separate the base material.
  • a peelable protective film can be laminated on the separation layer in the same manner to obtain a touch sensor layer.
  • the touch sensor layer may be transferred to another resin film and incorporated into the flexible laminate together with the resin film.
  • the touch sensor layer may be incorporated into the flexible laminate in a form that does not have a resin film.
  • the thickness of the touch sensor layer is, for example, 5 to 100 ⁇ m, preferably 5 to 50 ⁇ m, more preferably 6 to 30 ⁇ m, and may be 6 to 15 ⁇ m.
  • the thickness of the touch sensor layer is 5 ⁇ m or more, the impact resistance of the flexible laminate can be enhanced, and when it is 100 ⁇ m or less, the flexibility of the flexible laminate can be enhanced.
  • the polarizing plate 40 of the flexible laminated body 100 is bonded to the touch sensor layer 30 in which the glass plate 20 is laminated on the entire upper portion via the adhesive layer (FIG. 1A), or the glass plate 20 is formed on the entire lower portion. It is attached to the laminated touch sensor layer 30 (FIG. 1B), or attached to the window film 10 and the touch sensor layer 30 in which the glass plate 20 is laminated on the entire upper surface (FIG. 1C), or with the window film 10. It is attached to the touch sensor layer 30 on which the glass plate 20 is laminated on the entire lower portion (FIG. 1D).
  • the polarizing plate is preferably arranged as close as possible to the window film 10.
  • the polarizing plate is arranged on the side that can be visually recognized (window film 10 side) with respect to the touch sensor layer. By doing so, the pattern of the touch sensor layer becomes difficult to see, and the visibility of the obtained display device is improved. From this point of view, among the embodiments shown in FIGS. 1A to 1D, those of FIGS. 1C and 1D are preferable.
  • the polarizing plate 40 may be composed of a linear polarizing plate or a circular polarizing plate.
  • the linear polarizing plate include a stretched film or a stretched layer on which a dichroic dye is adsorbed, or a film containing a film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound as a polarizer. ..
  • the dichroic dye iodine or a dichroic organic dye is used.
  • C.I. I. Includes a dichroic direct dye composed of a disazo compound such as DIRECT RED 39, and a dichroic direct dye composed of a compound such as trisazo and tetrakisazo.
  • the film to which the composition containing the dichroic dye and the polymerizable compound used as a polarizer is applied and cured includes a composition containing a dichroic dye having a liquid crystal property or a dichroic dye and a polymerizable liquid crystal.
  • a composition containing a dichroic dye having a liquid crystal property or a dichroic dye and a polymerizable liquid crystal examples thereof include a film containing a cured product of a polymerizable liquid crystal compound such as a layer obtained by applying and curing the composition containing the above.
  • a film coated with a composition containing a dichroic dye and a polymerizable compound and cured is preferable because there is no limitation in the bending direction as compared with a stretched film or a stretched layer on which a dichroic dye is adsorbed.
  • the linear polarizing plate may be composed of only a polarizing element, or may further include a resin film, a base material, an alignment film, and a protective layer in addition to the polarizing element.
  • the thickness of the linear polarizing plate is, for example, 1 to 100 ⁇ m, preferably 5 to 75 ⁇ m, and more preferably 10 to 50 ⁇ m.
  • a linear polarizing plate having a stretched film having a dichroic dye adsorbed as a polarizer will be described.
  • a stretched film on which a dichroic dye, which is a polarizer, is adsorbed is usually bicolorized by a step of uniaxially stretching the polyvinyl alcohol-based resin film and dyeing the polyvinyl alcohol-based resin film with the bicolor dye.
  • a polarizer may be used as it is as a linear polarizing plate, or a resin film described later may be bonded to one side or both sides thereof and used as a linear polarizing plate.
  • the thickness of the polarizer is, for example, 0.1 to 50 ⁇ m, preferably 0.5 to 25 ⁇ m, and more preferably 1 to 10 ⁇ m.
  • the polyvinyl alcohol-based resin is obtained by saponifying the polyvinyl acetate-based resin.
  • the polyvinyl acetate-based resin in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer of vinyl acetate and another monomer copolymerizable therewith is used.
  • examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and (meth) acrylamides having an ammonium group.
  • the degree of saponification of the polyvinyl alcohol-based resin is usually 85 to 100 mol%, preferably 98 mol% or more.
  • the polyvinyl alcohol-based resin may be modified, and for example, polyvinyl formal or polyvinyl acetal modified with aldehydes can also be used.
  • the degree of polymerization of the polyvinyl alcohol-based resin is usually 1000 to 10000, preferably 1500 to 5000.
  • the stretched layer on which the dichroic dye, which is a polarizer, is adsorbed is usually a step of applying the coating liquid containing the polyvinyl alcohol-based resin on the base film, a step of uniaxially stretching the obtained laminated film, and uniaxial.
  • a step of dyeing the polyvinyl alcohol-based resin layer of the stretched laminated film with a dichroic dye to adsorb the dichroic dye to form a polarizer, and the film on which the dichroic dye is adsorbed is an aqueous boric acid solution.
  • the base film may be peeled off from the polarizer.
  • the material and thickness of the base film may be the same as the material and thickness of the resin film described later.
  • the stretched film or the polarizing element which is a stretched layer, may be incorporated into the optical laminate in a form in which a resin film is bonded to one side or both sides thereof.
  • This resin film can function as a protective film for a polarizer or a retardation layer.
  • the resin film may be a thermoplastic resin film.
  • the resin film is, for example, a polyolefin resin such as a chain polyolefin resin (polypropylene resin or the like), a cyclic polyolefin resin (norbornen resin or the like); a cellulose resin such as triacetyl cellulose; polyethylene terephthalate, polyethylene naphthalate, etc. It can be a film composed of a polyester resin such as polybutylene terephthalate; a polycarbonate resin; a (meth) acrylic resin; or a mixture thereof.
  • the thickness of the resin film is usually 1 to 100 ⁇ m, preferably 5 to 50 ⁇ m, and more preferably 10 to 25 ⁇ m from the viewpoint of improving flexibility while protecting the polarizer.
  • the resin film may or may not have a phase difference.
  • the resin film can be attached to the polarizer using, for example, an adhesive layer.
  • Linear polarizing plate having a film coated and cured with a composition containing a dichroic dye and a polymerizable compound as a polarizer
  • a linear polarizing plate having as a polarizer will be described.
  • a film to which a composition containing a dichroic dye and a polymerizable compound used as a polarizer is applied and cured is a composition containing a dichroic dye having a liquid crystal property, or a dichroic dye and a liquid crystal compound. Examples thereof include a film obtained by applying the containing composition to a substrate and curing it.
  • the film may be used as a linear polarizing plate by peeling off the base material or together with the base material, or may be used as a linear polarizing plate in a configuration having a thermoplastic resin film on one side or both sides thereof.
  • the base material may be a resin film.
  • the example and thickness of the base material may be the same as those exemplified in the above description of the resin film.
  • the base material may be a resin film having a hard coat layer, an antireflection layer, or an antistatic layer on at least one surface.
  • the base material may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface on the side where the polarizer is not formed.
  • the base material may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface on the side where the polarizer is formed.
  • Examples of the resin film include the same stretched film or linear polarizing plate having a stretched layer as a polarizer.
  • An overcoat layer can also be formed on the polarizer.
  • the overcoat layer is formed by applying a water-based adhesive or an active energy ray-curable adhesive, which will be described later.
  • the thickness of the overcoat layer is, for example, 0.1 to 10 ⁇ m, preferably 1 to 5 ⁇ m.
  • the film to which the composition containing the dichroic dye and the polymerizable compound is applied and cured is thin, but if it is too thin, the strength is lowered and the processability tends to be inferior.
  • the thickness of the film is, for example, 1 to 100 ⁇ m, preferably 5 to 50 ⁇ m, and more preferably 10 to 25 ⁇ m.
  • the film coated with the composition containing the dichroic dye and the polymerizable compound and cured include those described in JP2013-37353A, JP2013-33249, and the like. ..
  • the linear polarizing plate can be circularly polarized light having a retardation layer.
  • a circularly polarizing plate in which a polarizer and a retardation layer are arranged so that the absorption axis of the linear polarizing plate and the slow axis of the retardation layer are at a predetermined angle can exhibit an antireflection function.
  • the retardation layer includes a ⁇ / 4 plate
  • the angle formed by the absorption axis of the linear polarizing plate and the slow axis of the ⁇ / 4 plate can be 45 ° ⁇ 10 °.
  • the linear polarizing plate and the retardation layer may be bonded by an adhesive layer or an adhesive layer.
  • the adhesive layer is such that the window film 10 located on the side to be visually recognized, the glass plate 20, the touch sensor layer 30, and the polarizing plate 40 are bonded to each other. do. Further, the adhesive layer can form a display device by laminating the flexible laminate 100 and the lower structure 50 (FIG. 2).
  • the adhesive layer is an adhesive layer or an adhesive layer.
  • the adhesive refers to an adhesive having pressure-sensitive adhesiveness.
  • the adhesive layer is an adhesive layer
  • the adhesive layer is an adhesive containing, for example, a resin such as (meth) acrylic, rubber, urethane, ester, silicone, or polyvinyl ether as a main component. It is composed of an agent composition. Among them, a pressure-sensitive adhesive composition using a (meth) acrylic resin having excellent transparency, weather resistance, heat resistance and the like as a base polymer is preferable.
  • the pressure-sensitive adhesive composition may be an active energy ray-curable type or a thermosetting type.
  • Examples of the (meth) acrylic resin (base polymer) used in the pressure-sensitive adhesive composition include butyl (meth) acrylate, ethyl (meth) acrylate, isooctyl (meth) acrylate, and 2- (meth) acrylate.
  • a polymer or copolymer using one or more of (meth) acrylic acid esters such as ethylhexyl as a monomer is preferably used.
  • the base polymer is preferably copolymerized with polar monomers.
  • Examples of the polar monomer include (meth) acrylic acid, 2-hydroxypropyl (meth) acrylate, hydroxyethyl (meth) acrylate, (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylate, and glycidyl ().
  • Examples thereof include monomers having a carboxyl group, a hydroxyl group, an amide group, an amino group, an epoxy group and the like, such as meth) acrylate.
  • the pressure-sensitive adhesive composition may consist of the base polymer alone, but usually further contains a cross-linking agent.
  • the cross-linking agent is a divalent or higher metal ion that forms a carboxylic acid metal salt with a carboxyl group; a polyamine compound that forms an amide bond with a carboxyl group; Examples thereof include polyepoxy compounds and polyols that form an ester bond with a carboxyl group; polyisocyanate compounds that form an amide bond with a carboxyl group, and the like. Of these, polyisocyanate compounds are preferable.
  • the active energy ray-curable pressure-sensitive adhesive composition has a property of being cured by being irradiated with active energy rays such as ultraviolet rays and electron beams, and has adhesiveness even before irradiation with active energy rays. It can be brought into close contact with an adherend such as a film. It can be cured by irradiation with active energy rays and the adhesion can be adjusted.
  • the active energy ray-curable pressure-sensitive adhesive composition is preferably an ultraviolet-curable type.
  • the active energy ray-curable pressure-sensitive adhesive composition contains an active energy ray-polymerizable compound in addition to the base polymer and the cross-linking agent as described above. A photopolymerization initiator, a photosensitizer, and the like are also included as appropriate.
  • the pressure-sensitive adhesive composition includes fine particles for imparting light scattering properties, beads (resin beads, glass beads, etc.), glass fibers, resins other than the base polymer, adhesive adhesive-imparting agents, fillers (metal powder and other materials). Additives such as (inorganic powder, etc.), antioxidants, ultraviolet absorbers, dyes, pigments, colorants, antifoaming agents, corrosion inhibitors, photopolymerization initiators, etc. may be further contained.
  • the pressure-sensitive adhesive layer can be formed by applying an organic solvent diluent of the pressure-sensitive adhesive composition on a substrate and drying it.
  • the formed pressure-sensitive adhesive layer can be irradiated with active energy rays to obtain a cured product having a desired degree of curing.
  • the thickness of the pressure-sensitive adhesive layer is, for example, 0.1 to 30 ⁇ m, preferably 0.5 to 20 ⁇ m, and more preferably 1 to 10 ⁇ m.
  • the storage elastic modulus of the pressure-sensitive adhesive layer is, for example, 0.001 to 1 MPa, preferably 0.01 to 0.3 MPa, and more preferably 0.05 to 0.1 MPa at 25 ° C.
  • the storage elastic modulus of the pressure-sensitive adhesive layer can be measured by the method described in Examples described later.
  • the adhesive layer 20 is an adhesive layer
  • the adhesive layer can be formed from, for example, a water-based adhesive or an active energy ray-curable adhesive.
  • water-based adhesive examples include a polyvinyl alcohol-based resin aqueous solution, an aqueous two-component urethane-based emulsion adhesive composition, and the like, and a polyvinyl alcohol-based resin aqueous solution is preferable.
  • the content of the polyvinyl alcohol-based resin is preferably 1 to 10 parts by mass or less, and preferably 1 to 5 parts by mass with respect to 100 parts by mass of water. More preferable.
  • a polyhydric aldehyde, a water-soluble epoxy compound, a melamine compound, a zirconia compound, a zinc compound, or the like may be added as an additive to the water-based adhesive.
  • the water-based adhesive preferably contains a curable component such as a metal salt of glyoxylic acid, glyoxal, and a water-soluble epoxy resin and / or a cross-linking agent in order to improve the adhesiveness.
  • a curable component such as a metal salt of glyoxylic acid, glyoxal, and a water-soluble epoxy resin and / or a cross-linking agent in order to improve the adhesiveness.
  • the metal salt of glyoxylic acid is preferably an alkali metal salt or an alkaline earth metal salt, and examples thereof include sodium glyoxylate, potassium glyoxylate, magnesium glyoxylate, calcium glyoxylate and the like.
  • the water-soluble epoxy resin is a polyamide polyamine epoxy resin obtained by reacting epichlorohydrin with a polyamide amine obtained by reacting a polyalkylene polyamine such as diethylenetriamine or triethylenetetramine with a dicarboxylic acid such as adipic acid. Can be preferably used.
  • the active energy ray-curable adhesive contains an active energy ray-curable compound.
  • the active energy ray-curable compound include a cationically polymerizable compound and a radically polymerizable compound.
  • a cationically polymerizable compound or a radically polymerizable compound is contained, the effect of increasing the hardness of the adhesive layer can be expected.
  • Examples of the cationically polymerizable compound include an oxetane compound and an epoxy compound.
  • the content of the cationically polymerizable compound is preferably 10 to 99 parts by mass, more preferably 40 to 99 parts by mass, based on 100 parts by mass of the active energy ray-curable adhesive composition.
  • the active energy ray-curable adhesive may contain only one type of oxetane compound, or may contain two or more types of oxetane compounds.
  • the active energy ray-curable adhesive may contain only one type of epoxy compound, or may contain two or more types of epoxy compounds.
  • Examples of the radically polymerizable compound include (meth) acrylic compounds and (meth) acrylamide compounds.
  • Examples of the (meth) acrylic compound include a (meth) acrylate monomer having at least one (meth) acryloyloxy group in the molecule and a (meth) acrylate oligomer having at least two (meth) acryloyloxy groups in the molecule. Can be mentioned. Each of these may be used alone, or two or more thereof may be used in combination.
  • Examples of the (meth) acrylamide compound include N-substituted (meth) acrylamide compounds.
  • the N-substituted (meth) acrylamide compound is a (meth) acrylamide compound having a substituent at the N-position.
  • a typical example of the substituent is an alkyl group.
  • the substituents at the N-position may be bonded to each other to form a ring, and -CH 2- which constitutes this ring may be substituted with an oxygen atom.
  • N-substituted (meth) acrylamide can generally be produced by the reaction of (meth) acrylic acid or its chloride with a primary or secondary amine.
  • the content of the radically polymerizable compound is preferably 1 to 70 parts by mass and more preferably 10 to 60 parts by mass with respect to 100 parts by mass of the active energy ray-curable adhesive.
  • the active energy ray-curable adhesive may contain only one type of radically polymerizable compound, or may contain two or more types.
  • the active energy ray-curable adhesive may further contain a cationic polymerization initiator or a radical polymerization initiator.
  • the active energy ray-curable adhesive may contain only one type of polymerization initiator, or may contain two or more types of polymerization initiators.
  • the window film 10 In the flexible laminate 100, the window film 10, the glass plate 20, the touch sensor layer 30, and the polarizing plate 40 are located on the viewing surface side of the window film, and the glass plate is on the upper part of the touch sensor layer 30 or. It can be manufactured by laminating so that it is located at the bottom. When these members are bonded, the adhesive layer may be used, and the bonded surface may be easily bonded.
  • the glass plate 20 and the touch sensor layer 30 are bonded to each other via an adhesive layer to obtain a glass plate bonded touch sensor layer.
  • the glass plate 20 may be located above or below the touch sensor layer 30.
  • the exposed surface of the window film 10 not covered with a hard coat or the like and the polarizing plate 40 are bonded to each other via an adhesive layer.
  • the exposed surface of the polarizing plate 40 and the glass plate bonding touch sensor layer are bonded to each other via the adhesive layer.
  • the surface to which the glass plate bonding touch sensor layer is bonded may be the glass plate side or the touch sensor layer side.
  • the exposed surface of the window film 10 not covered with the hard coat or the like and the glass plate bonding touch sensor layer are bonded via the adhesive layer.
  • the surface to which the glass plate bonding touch sensor layer is bonded may be the glass plate side or the touch sensor layer side.
  • the exposed surface of the glass plate bonding touch sensor layer and the polarizing plate 40 are bonded via the adhesive layer.
  • the flexible laminate can be used as a layer constituting the visible surface side of the display device.
  • Specific examples of the display device include an organic EL display device.
  • the flexible laminated body 100 can manufacture the display device 200 by laminating the lower structure of the display device on the lower part.
  • the exposed surface of the flexible laminate 100 that is not on the visible side and the display surface of the lower structure may be bonded to each other via the adhesive layer.
  • the substructure of the display device include a display structure including an organic EL layer and an organic EL panel.
  • a display device including a flexible laminated body preferably has a window film located on the side to be visually recognized inside, and is preferably bent and stretched by 180 ° with a bending radius of 3 mm when the operation is repeated 100,000 times. It is possible to have bending resistance so that the window film does not crack or break when repeated times.
  • the specific method of the bending test follows the method described in Examples described later.
  • the unit "part" of the mixing ratio of the substance is based on mass unless otherwise specified.
  • the measurement method for the following items was as follows.
  • (A) Layer thickness The thickness of each layer was measured using a contact-type film thickness measuring device (“MS-5C” (trade name) manufactured by Nikon Corporation). However, the polarizer and the alignment film were measured using a laser microscope (“OLS3000” (trade name) manufactured by Olympus Corporation).
  • ⁇ Manufacturing example> (Preparation of window film 10)
  • a transparent base film polyamideimide film, thickness 40 ⁇ m) prepared according to Example 4 of JP-A-2018-119141 is coated with the following composition for a hard coat layer, and then the solvent is dried.
  • a window film 10 thickness 50 ⁇ m
  • a hard coat layer having a thickness of 10 ⁇ m formed on one side of the base film was produced.
  • Composition for forming a hard coat layer 30 parts of multifunctional acrylate (“MIRAMER M340” (trade name) manufactured by MIWON Specialty Chemical Co., Ltd.), nanosilica sol (particle size 12 nm, solid content 40%) dispersed in propylene glycol monomethyl ether 50 Parts, 17 parts of ethyl acetate, photopolymerization initiator (BASF "I184" (trade name)) 2.7 parts, fluorine-based additive ("KY1203" (trade name) manufactured by Shin-Etsu Chemical Industry Co., Ltd.) 0.3 The parts were prepared by blending using a stirrer and filtering using a filter made of polypropylene (PP) material.
  • MIRAMER M340 trade name
  • nanosilica sol particle size 12 nm, solid content 40%
  • a separation layer, a protective layer, and a transparent conductive layer were formed in this order on the glass substrate.
  • the transparent conductive layer was patterned by photolithography.
  • the separation layer is a cured layer of an acrylic resin and has a thickness of 0.5 ⁇ m.
  • the protective layer is a cured layer of an acrylic resin and has a thickness of 3 ⁇ m.
  • the transparent conductive layer has an indium tin oxide (ITO) layer, and its surface is coated with an insulating layer. The thickness of the ITO layer is 0.1 ⁇ m.
  • the insulating layer is a cured product of the photosensitive resin composition described in Example 3 of Japanese Patent Application Laid-Open No. 2016-14877, and has a thickness of 2 ⁇ m.
  • the touch sensor layer 30 composed of the separation layer, the protective layer, and the transparent conductive layer was peeled off from the glass substrate and used for producing a flexible laminate.
  • a photoalignment film was formed on a 25 ⁇ m-thick triacetyl cellulose (TAC) film.
  • a composition containing a dichroic dye and a polymerizable liquid crystal compound was applied onto the photoalignment film, and the mixture was oriented and cured to prepare a polarizer having a thickness of 2 ⁇ m.
  • An acrylic resin composition was further applied onto the polarizer and cured by irradiating with ultraviolet rays to form an overcoat layer having a thickness of 2 ⁇ m.
  • a retardation layer including a layer obtained by polymerizing and curing a liquid crystal compound was laminated via an acrylic pressure-sensitive adhesive layer having a thickness of 5 ⁇ m.
  • the layer structure of the retardation layer is a ⁇ / 4 plate (thickness 2 ⁇ m) consisting of a layer in which the liquid crystal compound is cured and an alignment film / an ultraviolet curable adhesive layer (thickness 2 ⁇ m) / a layer in which the liquid crystal compound is cured and an alignment film. It was a positive C plate (thickness 3 ⁇ m) composed of.
  • the retardation layers were laminated in the order of the ⁇ / 4 plate and the positive C plate from the polarizer side. The angle formed by the slow axis of ⁇ / 4 and the absorption axis of the polarizer was 45 °. In this way, the polarizing plate 40 was produced.
  • the polarizing plate 40 was a circular polarizing plate.
  • An acrylic resin was prepared by reacting the following components at 55 ° C. with stirring in a nitrogen atmosphere. Butyl acrylate: 70 parts, Methyl acrylate: 20 parts, Acrylic acid: 1.0 parts, Radical polymerization initiator (2,2'-azobisisobutyronitrile): 0.2 parts, Solvent (ethyl acetate) : 80 copies.
  • a cross-linking agent (“Coronate L” (trade name) manufactured by Tosoh Corporation) and a silane coupling agent (“X-12-981” (trade name) manufactured by Shin-Etsu Chemical Co., Ltd.) ) 0.5 parts were mixed, and ethyl acetate was added so that the total solid content concentration became 10% to prepare a pressure-sensitive adhesive composition.
  • the obtained pressure-sensitive adhesive composition was applied to the release-treated surface of the release-treated polyethylene terephthalate film (release film B, thickness 38 ⁇ m) using an applicator so that the thickness after drying was 25 ⁇ m. ..
  • the coating layer was dried at 100 ° C. for 1 minute to obtain a film having an adhesive layer.
  • release film A thickness 38 ⁇ m
  • release film B another polyethylene terephthalate film that had been released from the mold was attached onto the exposed surface of the pressure-sensitive adhesive layer. Then, it was cured for 7 days under the conditions of a temperature of 23 ° C. and a relative humidity of 50% RH. In this way, a pressure-sensitive adhesive layer composed of the release film A / pressure-sensitive adhesive layer / release film B was produced.
  • the storage elastic modulus of the pressure-sensitive adhesive layer at 25 ° C. was 0.05 MPa. The release film was appropriately peeled off when the flexible laminate was produced.
  • a colored polyimide film (thickness 50 ⁇ m) is laminated on one surface of a colored polyimide film (“UPILEX-35S” (trade name) manufactured by Ube Industries, Ltd., thickness 35 ⁇ m) via the adhesive layer (thickness 25 ⁇ m). Then, a lower structure 50 (thickness 110 ⁇ m) connected to the flexible laminate 100 was produced. This was used as a substitute for the display device substructure.
  • UPILEX-35S trademark
  • both sides of the glass plate 20 are corona-treated, and one of the surfaces, the touch sensor layer 30 and the glass plate are combined with an ultraviolet curable adhesive layer (Nitto Denko Corporation "NT-UV” series, "NT-01UV”. (Product name), thickness 1.5 ⁇ m or less).
  • NT-UV ultraviolet curable adhesive layer
  • Corona treatment was performed on the transparent base film surface of the window film 10, both sides of the polarizing plate 40, and both sides of the pressure-sensitive adhesive layer.
  • the flexible laminated body 100 was produced by laminating and laminating these in the order described below via the pressure-sensitive adhesive layer.
  • Example 1 A flexible laminated body 100 was produced by laminating the window film 10, the touch sensor layer 30 on which the glass plate 20 was laminated on the entire upper portion, and the polarizing plate 40 in this order from the side to be visually recognized (FIG. 1A).
  • Example 2 A flexible laminated body 100 was produced by laminating the window film 10, the touch sensor layer 30 on which the glass plate 20 was laminated on the entire lower portion, and the polarizing plate 40 in this order from the side to be visually recognized (FIG. 1B).
  • Example 3> A flexible laminated body 100 was produced by laminating the window film 10, the polarizing plate 40, and the touch sensor layer 30 on which the glass plate 20 was laminated on the entire upper portion in this order from the side to be visually recognized (FIG. 1C).
  • Example 4 A flexible laminated body 100 was produced by laminating the window film 10, the polarizing plate 40, and the touch sensor layer 30 on which the glass plate 20 was laminated on the entire lower portion in this order from the side to be visually recognized (FIG. 1D).
  • ⁇ Bottom pressure is less than 72 MPa
  • ⁇ Bottom pressure is 72 MPa or more and less than 75 MPa
  • ⁇ Bottom pressure is 75 MPa or more and less than 80 MPa
  • X Bottom pressure is 80 MPa or more.
  • a pressure-sensitive paper (HS Grade, manufactured by Fuji Image Tech) was scanned using a scanner (“V350” (trade name) manufactured by EPSON) using a program (FPD-8010E).
  • the pressure measurement range of the pressure-sensitive paper of HS Grade is 50 MPa to 130 MPa, and it is suitable for measuring the impact pressure (measurable range: 60 to 100 MPa) on the laminated body. The values are based on the highest confirmed value in the circular pressure range. The measurement was performed one day after the laminate was prepared.
  • ⁇ Bending test> The substructure 50 and the flexible laminate were subjected to corona treatment (conditions: frequency 20 Hz, output 8.6 kW, processing speed 6.8 m / min), and then laminated with each other via an adhesive layer to prepare a laminate.
  • a bending test was performed on the obtained laminate.
  • the bending test was performed under the conditions of normal temperature, bending radius of 3 mm, and infold method. That is, the obtained laminate is installed in a bending tester (COVOTEC "CFT-720C" (product name)) in a flat state (not bent) so that the window film side is on the inside (infold method). ) Was bent 180 ° and then returned to the original flat state.
  • the bending radius was set to 3 mm.
  • the operation of bending and returning to flatness was counted as one bending, and this operation was repeated.
  • the bending speed was set to one bending (60 rpm) in 1 second.
  • the number of times of bending when a crack or break occurred in the glass plate in the region bent by the bending operation was recorded as the limit number of times of bending, and evaluated according to the following criteria.
  • the limit number of bends is 200,000 or more
  • ⁇ The limit number of bends is 100,000 or more, less than 200,000
  • ⁇ The limit bending number is 10,000 times or more and less than 100,000 times
  • X The limit bending number is less than 10,000 times.
  • ⁇ When the pattern of the touch sensor layer 30 is invisible to the naked eye ⁇ : When the pattern of the touch sensor layer 30 is faintly visible to the naked eye.
  • the laminate of the present invention also has good results of the flexibility test and the visibility test.
  • the flexible laminate of the present invention satisfies the performance requirements as a flexible laminate for a display device.

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  • Engineering & Computer Science (AREA)
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  • General Physics & Mathematics (AREA)
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  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • Electroluminescent Light Sources (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024158021A1 (ja) * 2023-01-27 2024-08-02 日東電工株式会社 スイッチ装置、電子装置
JP7731024B1 (ja) 2024-03-29 2025-08-28 日東電工株式会社 積層体及びスイッチ装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019144681A (ja) * 2018-02-16 2019-08-29 東洋インキＳｃホールディングス株式会社 タッチパネルデバイス、及びタッチパネル
US20190355919A1 (en) * 2017-10-31 2019-11-21 Yungu (Gu'an) Technology Co., Ltd. Flexible substrate and manufacturing method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6000257B2 (ja) 2011-08-31 2016-09-28 昭和電工株式会社 ２−アルケニルアミン化合物の製造方法
KR101688173B1 (ko) 2011-12-26 2016-12-21 코오롱인더스트리 주식회사 플라스틱 기판

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190355919A1 (en) * 2017-10-31 2019-11-21 Yungu (Gu'an) Technology Co., Ltd. Flexible substrate and manufacturing method thereof
JP2019144681A (ja) * 2018-02-16 2019-08-29 東洋インキＳｃホールディングス株式会社 タッチパネルデバイス、及びタッチパネル

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024158021A1 (ja) * 2023-01-27 2024-08-02 日東電工株式会社 スイッチ装置、電子装置
JP7731024B1 (ja) 2024-03-29 2025-08-28 日東電工株式会社 積層体及びスイッチ装置

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