TW202039238A - Layered body and display device - Google Patents

Layered body and display device Download PDF

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Publication number
TW202039238A
TW202039238A TW109107336A TW109107336A TW202039238A TW 202039238 A TW202039238 A TW 202039238A TW 109107336 A TW109107336 A TW 109107336A TW 109107336 A TW109107336 A TW 109107336A TW 202039238 A TW202039238 A TW 202039238A
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layer
adhesive
adhesive layer
laminate
coating
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TW109107336A
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Chinese (zh)
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張柱烈
金恩瑛
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日商住友化學股份有限公司
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • 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]
    • 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
    • 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
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Adhesive Tapes (AREA)

Abstract

The objective of the present invention is to provide a layered body wherein the occurrence of cracks in a coating layer caused by bending has been suppressed, and a display device equipped with same. The present invention provides a layered body comprising a first protective layer, a first adhesive layer, a base material layer, an intercalated coating layer, a second adhesive layer, and a second protective layer, in this order, each of the layers being in contact with one another. When G'1 (kPa) is the storage modulus for the first adhesive layer at a temperature of 25 DEG C, G'2 (kPa) is the storage modulus for the second adhesive layer at a temperature of 25 DEG C, a1 ([mu]m) is the thickness of the first adhesive layer, and a2 ([mu]m) is the thickness of the second adhesive layer, the evaluation parameters A1 and A2 represented by formula (1) and formula (2) fulfill the relationships in formula (3), formula (4), and formula (5). (1)A1 = G'1/a1 (2)A2 = G'2/a2 (3)A1+A2 ≤ 230 4)A2-A1 ≥ 0 (5)A2 ≥ 34.

Description

積層體以及顯示裝置Laminated body and display device

本發明是有關於一種積層體以及顯示裝置。The present invention relates to a laminate and a display device.

日本專利特開2018-101117號公報（專利文獻1）中揭示了一種圖像顯示裝置，其在偏光板上經由第一黏著片貼合有透明膜基材，在透明膜基材上經由第二黏著片貼合有前表面透明構件。日本專利特開2018-028573號公報（專利文獻2）中，揭示了一種圖像顯示裝置用積層體，該圖像顯示裝置用積層體包含多個黏著劑層、及含有偏光膜的光學膜。 [現有技術文獻] [專利文獻]Japanese Patent Laid-Open No. 2018-101117 (Patent Document 1) discloses an image display device in which a transparent film substrate is attached to a polarizing plate via a first adhesive sheet, and a second The adhesive sheet is pasted with a transparent member on the front surface. Japanese Patent Application Laid-Open No. 2018-028573 (Patent Document 2) discloses a laminate for an image display device that includes a plurality of adhesive layers and an optical film containing a polarizing film. [Prior Art Literature] [Patent Literature]

[專利文獻1]日本專利特開2018-101117號公報 [專利文獻2]日本專利特開2018-028573號公報[Patent Document 1] Japanese Patent Laid-Open No. 2018-101117 [Patent Document 2] Japanese Patent Application Publication No. 2018-028573

[發明所欲解決之課題] 在積層體中，為了實現薄型化及輕量化，採用藉由薄膜塗層形成構成積層體的層的方法。但是，在使包含塗層的積層體彎曲時，存在塗層容易產生裂紋的問題。[The problem to be solved by the invention] In the laminate, in order to achieve thickness reduction and weight reduction, a method of forming the layers constituting the laminate by a thin film coating is adopted. However, when the layered body including the coating layer is bent, there is a problem that the coating layer is likely to crack.

本發明的目的在於提供一種抑制在塗層中產生因彎曲而引起的裂紋的積層體以及具備其的顯示裝置。 [解決課題之手段]The object of the present invention is to provide a laminate that suppresses the occurrence of cracks due to bending in a coating layer, and a display device including the laminate. [Means to solve the problem]

本發明提供以下所示的積層體以及顯示裝置。 [1]一種積層體，依次包括：第一保護層、第一黏著劑層、基材層、夾設塗層、第二黏著劑層、及第二保護層，其中， 各層相互接觸， 當將所述第一黏著劑層在溫度25℃下的儲存彈性係數設為G'1〔kpa〕、將所述第二黏著劑層在溫度25℃下的儲存彈性係數設為G'2〔kpa〕、將所述第一黏著劑層的厚度設為a1〔μm〕、將所述第二黏著劑層的厚度設為a2〔μm〕時，由下述式（1）及式（2）： A1=G'1/a1    （1） A2=G'2/a2    （2） 所表示的評價參數A1及A2滿足下式（3）、式（4）及式（5）： A1+A2≦230  （3） A2-A1≧0    （4） A2≧34      （5）。 [2]如[1]所述的積層體，其中，所述第一保護層包含拉伸彈性係數為4.0 GPa以上的窗口膜。 [3]如[1]或[2]所述的積層體，其中，所述第二保護層包括拉伸彈性係數為4.0 GPa以上的背面板。 [4]如[1]至[3]中任一項所述的積層體，其中，所述夾設塗層包含一層以上，各層的厚度為5 μm以下。 [5]如[1]至[4]中任一項所述的積層體，其中，所述夾設塗層包括偏振片層、相位差層或觸控感測器面板。 [6]如[1]至[5]中任一項所述的積層體，其中，所述G'1及所述G'2分別為10000 kPa以下。 [7]一種顯示裝置，包括如[1]至[6]中任一項所述的積層體。 [發明的效果]The present invention provides the laminate and display device shown below. [1] A laminated body, including in order: a first protective layer, a first adhesive layer, a substrate layer, an interposed coating, a second adhesive layer, and a second protective layer, wherein, The layers touch each other, When the storage elastic coefficient of the first adhesive layer at a temperature of 25°C is set to G'1 [kpa], and the storage elastic coefficient of the second adhesive layer at a temperature of 25°C is set to G'2[ kpa], when the thickness of the first adhesive layer is set to a1[μm] and the thickness of the second adhesive layer is set to a2[μm], the following formulas (1) and (2) : A1=G'1/a1 (1) A2=G'2/a2 (2) The indicated evaluation parameters A1 and A2 satisfy the following formula (3), formula (4) and formula (5): A1+A2≦230 (3) A2-A1≧0 (4) A2≧34 (5). [2] The laminate according to [1], wherein the first protective layer includes a window film having a tensile elastic modulus of 4.0 GPa or more. [3] The laminate according to [1] or [2], wherein the second protective layer includes a back sheet having a tensile elastic modulus of 4.0 GPa or more. [4] The laminate according to any one of [1] to [3], wherein the interposed coating layer includes one or more layers, and the thickness of each layer is 5 μm or less. [5] The laminate according to any one of [1] to [4], wherein the interposed coating layer includes a polarizer layer, a retardation layer, or a touch sensor panel. [6] The laminate according to any one of [1] to [5], wherein the G'1 and the G'2 are each 10000 kPa or less. [7] A display device including the laminate according to any one of [1] to [6]. [Effects of the invention]

根據本發明，能夠提供一種抑制在塗層中產生因彎曲而引起的裂紋的積層體以及具備其的顯示裝置。According to the present invention, it is possible to provide a laminate that suppresses the occurrence of cracks due to bending in a coating layer, and a display device including the same.

以下，參照圖式說明本發明的實施方式。Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜積層體＞ 圖1中示出本發明的一個形態的積層體（光學積層體）的概略剖面圖。積層體100依次包括第一保護層10、第一黏著劑層11、基材層15、夾設塗層12、第二黏著劑層13、及第二保護層14。各層互相接觸。以下，有時將第一黏著劑層11及第二黏著劑層13統稱為黏著劑層。＜Laminated body＞ FIG. 1 shows a schematic cross-sectional view of a laminate (optical laminate) according to one aspect of the present invention. The laminated body 100 includes a first protective layer 10, a first adhesive layer 11, a substrate layer 15, an interposed coating layer 12, a second adhesive layer 13, and a second protective layer 14 in this order. The layers are in contact with each other. Hereinafter, the first adhesive layer 11 and the second adhesive layer 13 may be collectively referred to as an adhesive layer.

積層體100的厚度根據積層體所需的功能以及積層體的用途等而不同，因此沒有特別限定，例如為30 μm以上且1000 μm以下，較佳為40 μm以上且500 μm以下，更佳為50 μm以上且300 μm以下。The thickness of the laminate 100 varies depending on the functions required of the laminate and the purpose of the laminate, so it is not particularly limited. For example, it is 30 μm or more and 1000 μm or less, preferably 40 μm or more and 500 μm or less, more preferably 50 μm or more and 300 μm or less.

積層體100的俯視形狀例如可為方形形狀，較佳為具有長邊和短邊的方形形狀，更佳為長方形。當積層體100的面方向的形狀為長方形時，長邊的長度例如可為10 mm以上且1400 mm以下，較佳為50 mm以上且600 mm以下。短邊的長度例如為5 mm以上且800 mm以下，較佳為30 mm以上且500 mm以下，更佳為50 mm以上且300 mm以下。對於構成積層體的各層，可對角部進行R加工，或者對端部進行切口加工，或者進行穿孔加工。The planar shape of the laminate 100 may be, for example, a square shape, preferably a square shape having long sides and short sides, and more preferably a rectangular shape. When the shape of the laminate 100 in the plane direction is a rectangle, the length of the long side may be, for example, 10 mm or more and 1400 mm or less, preferably 50 mm or more and 600 mm or less. The length of the short side is, for example, 5 mm or more and 800 mm or less, preferably 30 mm or more and 500 mm or less, and more preferably 50 mm or more and 300 mm or less. For each layer constituting the layered body, the corners can be R processed, or the end can be cut, or punched.

積層體100例如能夠用於顯示裝置等。顯示裝置沒有特別限定，例如可列舉：有機電致發光（有機（electroluminescence，EL））顯示裝置、無機電致發光（無機EL）顯示裝置、液晶顯示裝置、電場發光顯示裝置等。顯示裝置可具有觸控面板功能。The laminated body 100 can be used for, for example, a display device. The display device is not particularly limited, and examples thereof include organic electroluminescence (EL) display devices, inorganic electroluminescence (inorganic EL) display devices, liquid crystal display devices, electroluminescence display devices, and the like. The display device may have a touch panel function.

[黏著劑層的評價參數] 在積層體100中，當將第一黏著劑層11在溫度25℃下的儲存彈性係數設為G'1〔kpa〕、將第二黏著劑層13在溫度25℃下的儲存彈性係數設為G'2〔kpa〕、將第一黏著劑層11的厚度設為a1〔μm〕、將第二黏著劑層13的厚度設為a2〔μm〕時，由下述式（1）及式（2）： A1=G'1/a1    （1） A2=G'2/a2    （2） 所表示的評價參數A1及A2滿足下式（3）、式（4）及式（5）： A1+A2≦230  （3） A2-A1≧0    （4） A2≧34      （5）。 黏著劑層的儲存彈性係數及層的厚度按照後述實施例一欄中記載的測定方法進行測定。[Evaluation parameters of adhesive layer] In the laminate 100, when the storage elastic coefficient of the first adhesive layer 11 at a temperature of 25°C is set to G'1 [kpa], and the storage elastic coefficient of the second adhesive layer 13 at a temperature of 25°C is set to G'2[kpa], when the thickness of the first adhesive layer 11 is set to a1[μm], and the thickness of the second adhesive layer 13 is set to a2[μm], the following formula (1) and formula ( 2): A1=G'1/a1 (1) A2=G'2/a2 (2) The indicated evaluation parameters A1 and A2 satisfy the following formula (3), formula (4) and formula (5): A1+A2≦230 (3) A2-A1≧0 (4) A2≧34 (5). The storage elastic coefficient of the adhesive layer and the thickness of the layer are measured in accordance with the measurement method described in the column of Examples described later.

積層體100較佳為滿足下述式（3'）： A1+A2≦130  （3'）。The laminated body 100 preferably satisfies the following formula (3'): A1+A2≦130 (3').

積層體100較佳為滿足下述式（4'）： A2-A1≧100  （4'）。The laminate 100 preferably satisfies the following formula (4'): A2-A1≧100 (4').

積層體100較佳為滿足下述式（5'）： A2≧60      （5'）。The laminated body 100 preferably satisfies the following formula (5'): A2≧60 (5').

此種積層體100即使以第一保護層10為內側而彎曲，在夾設塗層12亦難以產生裂紋，即，彎曲性優異。包含塗層的積層體反覆彎曲時，塗層中有時會產生裂紋。在積層體100中，第一黏著劑層11及第二黏著劑層13的評價參數A1及A2分別隨著儲存彈性係數變高而變大，隨著層的厚度變薄而變大。即，A1和A2越大，黏著劑層越有變硬的傾向，A1和A2越小，黏著劑層越有變軟的傾向。本發明者等人發現，在使積層體彎曲時，以彎曲軸為基準，塗層與相對硬的黏著劑層的外側鄰接時，塗層的拉伸應力增加，容易產生裂紋。相反，發現在使積層體彎曲時，以彎曲軸為基準，塗層與相對硬的黏著劑層的內側鄰接時，塗層的拉伸應力降低，難以產生裂紋。因此可知，在第一黏著劑層11及第二黏著劑層13滿足所述式（3）、式（4）及式（5）的情況下，夾在第一黏著劑層11與第二黏著劑層13間的夾設塗層12的拉伸應力難以上升，即使以第一保護層為內側而反覆彎曲，亦抑制裂紋的產生。Even if such a laminate 100 is bent with the first protective layer 10 as the inner side, cracks are unlikely to occur in the interposed coating layer 12, that is, it is excellent in flexibility. When the laminate containing the coating is repeatedly bent, cracks may occur in the coating. In the laminate 100, the evaluation parameters A1 and A2 of the first adhesive layer 11 and the second adhesive layer 13 respectively become larger as the storage elastic coefficient becomes higher, and become larger as the thickness of the layer becomes thinner. That is, the larger A1 and A2, the harder the adhesive layer tends to be, and the smaller the A1 and A2, the softer the adhesive layer tends to be. The inventors of the present invention found that when the laminate is bent, when the coating is adjacent to the outer side of the relatively hard adhesive layer based on the bending axis, the tensile stress of the coating increases and cracks are likely to occur. On the contrary, it has been found that when the layered body is bent, when the coating is adjacent to the inner side of the relatively hard adhesive layer based on the bending axis, the tensile stress of the coating is reduced and cracks are less likely to occur. Therefore, it can be seen that when the first adhesive layer 11 and the second adhesive layer 13 satisfy the aforementioned formulas (3), (4) and (5), they are sandwiched between the first adhesive layer 11 and the second adhesive layer. The tensile stress of the interposed coating layer 12 between the agent layers 13 is difficult to increase, and even if the first protective layer is repeatedly bent with the first protective layer as the inner side, the generation of cracks is suppressed.

本說明書中，彎曲包括在彎曲部分形成有曲面的彎折的形態。在彎折的形態下，彎折的內表面的彎曲半徑無特別限定。另外，彎曲亦包括內表面的折彎角大於0度小於180度的折彎形態以及內表面的彎曲半徑近似為零或內表面的折彎角為0度的折疊形態。In this specification, bending includes a form of bending in which a curved surface is formed in a curved portion. In the bent form, the bending radius of the bent inner surface is not particularly limited. In addition, bending also includes a bending form in which the bending angle of the inner surface is greater than 0 degree and less than 180 degrees, and a folding form in which the bending radius of the inner surface is approximately zero or the bending angle of the inner surface is 0 degree.

根據本發明的積層體，能夠將塗層的耐裂紋性提高到即使按照後述實施例一欄中記載的試驗方法以彎曲半徑1 mm反覆彎曲20萬次以上亦不會產生裂紋的程度。在本發明中，塗層中產生的裂紋包括塗層中產生的裂痕以及塗層與黏著劑層間的剝離等。According to the layered product of the present invention, the crack resistance of the coating layer can be improved to such an extent that cracks do not occur even if it is repeatedly bent 200,000 times with a bending radius of 1 mm according to the test method described in the column of Examples described later. In the present invention, cracks generated in the coating include cracks generated in the coating and peeling between the coating and the adhesive layer, and the like.

第一黏著劑層11包含第一黏著劑組成物，第二黏著劑層13包含第二黏著劑組成物。作為以第一黏著劑層11和第二黏著劑層13的評價參數A1和A2滿足式（3）、式（4）及式（5）的方式製備第一黏著劑組成物及第二黏著劑組成物的方法，例如可列舉：由後述的黏著劑組成物構成黏著劑層、變更後述的構成(甲基)丙烯酸系聚合物的單體的種類、調節(甲基)丙烯酸系聚合物的分子量、或調製黏著劑層的厚度的方法以及該些的組合的方法等。The first adhesive layer 11 includes a first adhesive composition, and the second adhesive layer 13 includes a second adhesive composition. As the first adhesive composition and the second adhesive are prepared in such a way that the evaluation parameters A1 and A2 of the first adhesive layer 11 and the second adhesive layer 13 satisfy formulas (3), (4) and (5) Examples of methods for the composition include: forming the adhesive layer from the adhesive composition described later, changing the type of monomer constituting the (meth)acrylic polymer described later, and adjusting the molecular weight of the (meth)acrylic polymer , Or the method of adjusting the thickness of the adhesive layer, the method of combining these, etc.

[第一黏著劑層] 在積層體具有黏著劑層、熱塑性樹脂膜、塗層、黏著劑層按照該順序彼此接觸的結構時，將與熱塑性樹脂膜接觸的黏著劑層作為第一黏著劑層11。第一黏著劑層11可以是下述的黏著劑層。[The first adhesive layer] When the laminate has a structure in which an adhesive layer, a thermoplastic resin film, a coating layer, and an adhesive layer are in contact with each other in this order, the adhesive layer in contact with the thermoplastic resin film is used as the first adhesive layer 11. The first adhesive layer 11 may be the following adhesive layer.

第一黏著劑層11在溫度25℃下的儲存彈性係數G'1通常為10 kPa以上，較佳為30 kPa以上。第一黏著劑層11在溫度25℃下的儲存彈性係數G'1通常為10000 kPa以下，更佳為5000 kPa以下，進而佳為1000 kPa以下。黏著劑層的儲存彈性係數按照後述的實施例一欄中記載的方法測定。若儲存彈性係數G'1過小，則存在積層體的加工性降低的傾向，例如切削加工時黏著劑的端部自積層體脫落（脫漿），難以剝離剝離膜，積層體容易產生污垢。儲存彈性係數G'1過大時，積層體的彎曲性有下降的傾向。The storage elastic coefficient G'1 of the first adhesive layer 11 at a temperature of 25° C. is generally 10 kPa or more, preferably 30 kPa or more. The storage elastic coefficient G'1 of the first adhesive layer 11 at a temperature of 25° C. is usually 10000 kPa or less, more preferably 5000 kPa or less, and even more preferably 1000 kPa or less. The storage elastic coefficient of the adhesive layer is measured according to the method described in the column of Examples described later. If the storage elasticity coefficient G'1 is too small, the workability of the laminate tends to decrease. For example, the end of the adhesive falls off the laminate during cutting (desizing), it is difficult to peel the release film, and the laminate tends to generate dirt. When the storage elasticity coefficient G'1 is too large, the flexibility of the laminate tends to decrease.

第一黏著劑層11的厚度a1可為1 μm以上，較佳為3 μm以上。第一黏著劑層11的厚度a1可為100 μm以下，較佳為50 μm以下。The thickness a1 of the first adhesive layer 11 may be 1 μm or more, preferably 3 μm or more. The thickness a1 of the first adhesive layer 11 may be 100 μm or less, preferably 50 μm or less.

[第二黏著劑層] 在積層體具有黏著劑層、熱塑性樹脂膜、塗層、及黏著劑層按照該順序彼此接觸的結構時，將與塗層接觸的黏著劑層作為第二黏著劑層13。第二黏著劑層13可以是下述黏著劑層。[Second Adhesive Layer] When the laminate has a structure in which the adhesive layer, the thermoplastic resin film, the coating, and the adhesive layer are in contact with each other in this order, the adhesive layer in contact with the coating is used as the second adhesive layer 13. The second adhesive layer 13 may be the following adhesive layer.

第二黏著劑層13在溫度25℃下的儲存彈性係數G'2通常為10 kPa以上，較佳為30 kPa以上。第二黏著劑層13在溫度25℃下的儲存彈性係數G'2通常為10000 kPa以下，更佳為5000 kPa以下，進而佳為1000 kPa以下。黏著劑層的儲存彈性係數按照後述的實施例一欄中記載的方法測定。若儲存彈性係數G'2過小，則存在積層體的加工性降低的傾向，例如切削加工時黏著劑的端部自積層體脫落（脫漿），難以剝離剝離膜，積層體容易產生污垢。儲存彈性係數G'2過大時，則存在積層體的彎曲性下降的傾向。The storage elastic coefficient G'2 of the second adhesive layer 13 at a temperature of 25° C. is generally 10 kPa or more, preferably 30 kPa or more. The storage elastic coefficient G'2 of the second adhesive layer 13 at a temperature of 25° C. is generally 10000 kPa or less, more preferably 5000 kPa or less, and even more preferably 1000 kPa or less. The storage elastic coefficient of the adhesive layer is measured according to the method described in the column of Examples described later. If the storage elastic coefficient G'2 is too small, the workability of the laminate tends to decrease. For example, the end of the adhesive falls off (desizing) from the laminate during cutting, making it difficult to peel off the release film, and the laminate tends to generate dirt. When the storage elasticity coefficient G'2 is too large, the flexibility of the laminate tends to decrease.

第二黏著劑層13的厚度a2可為1 μm以上，較佳為3 μm以上。第二黏著劑層13的厚度a2可為100 μm以下，較佳為50 μm以下。The thickness a2 of the second adhesive layer 13 may be 1 μm or more, preferably 3 μm or more. The thickness a2 of the second adhesive layer 13 may be 100 μm or less, preferably 50 μm or less.

[夾設塗層] 在積層體具有黏著劑層、熱塑性樹脂膜、塗層、及黏著劑層按照該順序彼此接觸的結構時，將夾設於第一黏著劑層11與第二黏著劑層13之間的塗層設為夾設塗層12。塗層是包括塗佈塗佈液的步驟而形成的黏著劑層以外的層。夾設塗層12可包括偏振片層、相位差層、觸控感測器面板、接著劑層、或著色層，較佳包括下述的偏振片層、相位差層或觸控感測器面板，更佳為包括偏振片層或相位差層。著色層可以是遮蔽配置於圖像顯示裝置的非顯示區域的配線等的層。藉由將著色層配置在積層體的周緣部，能夠抑制漏光，另外，由於著色層如邊框般被識別，因此能夠提高設計性。[Clamping coating] When the laminate has a structure in which the adhesive layer, the thermoplastic resin film, the coating layer, and the adhesive layer are in contact with each other in this order, the coating layer is interposed between the first adhesive layer 11 and the second adhesive layer 13 Set as sandwich coating 12. The coating layer is a layer other than the adhesive layer formed by applying the coating liquid. The sandwich coating 12 may include a polarizer layer, a retardation layer, a touch sensor panel, an adhesive layer, or a colored layer, and preferably includes the following polarizer layer, retardation layer, or touch sensor panel , And more preferably include a polarizer layer or a retardation layer. The colored layer may be a layer that shields wiring or the like arranged in a non-display area of the image display device. By arranging the colored layer on the peripheral edge of the laminate, light leakage can be suppressed, and since the colored layer is recognized like a frame, the design can be improved.

塗佈方法包括塗佈法、印刷法、蒸鍍法等。作為塗佈法，可列舉棒塗法、刀塗法、刮板塗佈法、模塗法、直接凹版塗佈法、逆向凹版塗佈法、輥塗法、毛細管（capillary，CAP）塗佈法、旋塗法、噴塗法、網版塗佈法、狹縫塗佈法、浸漬塗佈法等。作為印刷法，可列舉平版印刷法、凹版印刷法、網版印刷法、噴墨印刷法等。作為蒸鍍法，可列舉濺射法、物理蒸鍍法（物理氣相沈積（physical vapor deposition，PVD））、化學蒸鍍法（化學氣相沈積（chemical vapor deposition，CVD））、電漿CVD（電漿增強化學氣相沈積（plasma-enhanced chemical vapor deposition，PECVD））等。Coating methods include coating methods, printing methods, vapor deposition methods, and the like. Examples of coating methods include bar coating, knife coating, blade coating, die coating, direct gravure coating, reverse gravure coating, roll coating, and capillary (CAP) coating methods. , Spin coating, spray coating, screen coating, slit coating, dip coating, etc. Examples of printing methods include offset printing, gravure printing, screen printing, and inkjet printing. Examples of vapor deposition methods include sputtering, physical vapor deposition (physical vapor deposition (PVD)), chemical vapor deposition (chemical vapor deposition (CVD)), plasma CVD (Plasma-enhanced chemical vapor deposition (PECVD)) and so on.

夾設塗層12包含一層以上。各層的厚度通常為5 μm以下。各層的厚度通常為0.01 μm以上。夾設塗層12的厚度較佳為1 μm以上20 μm以下，可為10 μm以下。夾設塗層12包含偏振片層時，夾設塗層12的厚度例如為1 μm以上15 μm以下。夾設塗層12包含相位差層時，夾設塗層12的厚度例如為1 μm以上8 μm以下。夾設塗層12包含觸控感測器面板時，夾設塗層12的厚度例如為15 μm以下。The sandwich coating 12 includes more than one layer. The thickness of each layer is usually 5 μm or less. The thickness of each layer is usually 0.01 μm or more. The thickness of the interposed coating layer 12 is preferably 1 μm or more and 20 μm or less, and may be 10 μm or less. When the interposing coating layer 12 includes a polarizing plate layer, the thickness of the interposing coating layer 12 is, for example, 1 μm or more and 15 μm or less. When the interposing coating layer 12 includes a retardation layer, the thickness of the interposing coating layer 12 is, for example, 1 μm or more and 8 μm or less. When the sandwich coating 12 includes a touch sensor panel, the thickness of the sandwich coating 12 is, for example, 15 μm or less.

[基材層] 在積層體具有黏著劑層、熱塑性樹脂膜、塗層、黏著劑層按照該順序相互接觸的結構時，將位於第一黏著劑層11與第二黏著劑層13之間的熱塑性樹脂膜作為基材層15。基材層15通常是供塗佈上述塗佈液的基材。基材層15可以是下述的基材膜。[Substrate layer] When the laminate has a structure in which an adhesive layer, a thermoplastic resin film, a coating layer, and an adhesive layer are in contact with each other in this order, the thermoplastic resin film located between the first adhesive layer 11 and the second adhesive layer 13 is used as the base材层15。 Material layer 15. The substrate layer 15 is usually a substrate on which the above-mentioned coating liquid is applied. The base layer 15 may be the base film described below.

[第一保護層] 將為積層體的一部分、與第一黏著劑層11接觸並且存在於與基材層15側相反的一側的整個結構部分設為第一保護層10。當在隔著第一黏著劑層11而與基材層15側相反的一側存在多個層時，將其全部作為第一保護層10。第一保護層10可包括下述的前表面板、基材膜、黏著劑層、偏振片層、相位差層、觸控感測器面板、貼合層、背面板等中的一個以上。第一保護層10較佳為包括前表面板。[First protective layer] A part of the layered body, the entire structural part that is in contact with the first adhesive layer 11 and exists on the side opposite to the base layer 15 side is referred to as the first protective layer 10. When there are a plurality of layers on the side opposite to the base layer 15 side with the first adhesive layer 11 interposed therebetween, all of them are regarded as the first protective layer 10. The first protective layer 10 may include one or more of the following front surface plate, base film, adhesive layer, polarizer layer, retardation layer, touch sensor panel, bonding layer, back plate, and the like. The first protective layer 10 preferably includes a front surface plate.

[第二保護層] 將為積層體的一部分、與第二黏著劑層13接觸並且存在於與夾設塗層12側相反的一側的整個結構部分設為第二保護層14。當在隔著第二黏著劑層13而與夾設塗層12側相反的一側存在多個層時，將其全部作為第二保護層14。第二保護層14可包括下述的基材膜、黏著劑層、偏振片層、相位差層、觸控感測器面板、貼合層、背面板等中的一個以上。第二保護層14較佳為包括背面板。[Second protective layer] The second protective layer 14 is used as a part of the laminated body, and the entire structural part that is in contact with the second adhesive layer 13 and exists on the side opposite to the side where the coating layer 12 is interposed. When there are a plurality of layers on the side opposite to the side where the coating layer 12 is interposed with the second adhesive layer 13 interposed therebetween, all of them are used as the second protective layer 14. The second protective layer 14 may include one or more of the following base film, adhesive layer, polarizer layer, retardation layer, touch sensor panel, bonding layer, back plate, and the like. The second protective layer 14 preferably includes a back plate.

積層體中存在多個黏著劑層、熱塑性樹脂膜、塗層、及黏著劑層按照該順序彼此接觸的結構時，第一保護層10、第一黏著劑層11、基材層15、夾設塗層12、第二黏著劑層13、及第二保護層14可藉由多個模式認定。例如，積層體100包含前表面板/黏著劑層I/基材膜I/塗層I/黏著劑層II/基材膜II/塗層II/黏著劑層III/背面板時（「/」是指相鄰的層接觸。以下相同），第一保護層10、第一黏著劑層11、夾設塗層12、第二黏著劑層13及第二保護層14可藉由兩種模式認定。即，可認定為：第一保護層10是前表面板、第一黏著劑層11是黏著劑層I、基材層15是基材膜I、夾設塗層12是塗層I、第二黏著劑層13是黏著劑層II、第二保護層14是基材膜II/塗層II/黏著劑層III/背面板。另一方面，亦可認定為：第一保護層10是前表面板/黏著劑層I/基材膜I/塗層I，第一黏著劑層11是黏著劑層II，基材層15是基材膜II、夾設塗層12是塗層II，第二黏著劑層13是黏著劑層III，第二保護層14是背面板。在此種情況下，在兩個認定模式中，評價參數A1及評價參數A2滿足式（3）、式（4）及式（5）的積層體以第一保護層為內側而彎曲時，抑制塗層中的裂紋的產生。When there is a structure in which a plurality of adhesive layers, thermoplastic resin films, coatings, and adhesive layers are in contact with each other in this order in the laminate, the first protective layer 10, the first adhesive layer 11, the substrate layer 15, and the interposed The coating 12, the second adhesive layer 13, and the second protective layer 14 can be identified by multiple modes. For example, when the laminate 100 includes a front surface plate/adhesive layer I/base film I/coating layer I/adhesive layer II/base film II/coating layer II/adhesive layer III/back plate ("/" It means that adjacent layers are in contact. The same below), the first protective layer 10, the first adhesive layer 11, the interlayer coating 12, the second adhesive layer 13, and the second protective layer 14 can be identified by two modes . That is, it can be determined that the first protective layer 10 is the front surface plate, the first adhesive layer 11 is the adhesive layer I, the base layer 15 is the base film I, the interposed coating 12 is the coating I, and the second The adhesive layer 13 is the adhesive layer II, and the second protective layer 14 is the base film II/coating layer II/adhesive layer III/back plate. On the other hand, it can also be regarded as: the first protective layer 10 is the front surface plate/adhesive layer I/substrate film I/coating I, the first adhesive layer 11 is the adhesive layer II, and the substrate layer 15 is The substrate film II and the interposed coating layer 12 are the coating layer II, the second adhesive layer 13 is the adhesive layer III, and the second protective layer 14 is the back plate. In this case, in the two certification modes, when the evaluation parameter A1 and the evaluation parameter A2 satisfy the formula (3), formula (4) and formula (5), when the laminate is bent with the first protective layer as the inner side, it is suppressed The generation of cracks in the coating.

以下，對可構成積層體100的層進行說明。Hereinafter, the layers that can constitute the laminate 100 will be described.

（前表面板） 前表面板只要是能夠透射光的板狀體，並不限定材料及厚度，另外，可僅包含1層，亦可包含2層以上。作為其例子，可列舉樹脂製的板狀體（例如樹脂板、樹脂片、樹脂膜等）、玻璃製的板狀體（例如玻璃板、玻璃膜等）等、後述的觸控感測器面板。前表面板能夠構成顯示裝置的最表面。(Front panel) As long as the front surface plate is a plate-shaped body capable of transmitting light, the material and thickness are not limited, and may include only one layer or two or more layers. Examples thereof include resin-made plate-shaped bodies (for example, resin plates, resin sheets, resin films, etc.), glass-made plate-shaped bodies (for example, glass plates, glass films, etc.), etc., and touch sensor panels described later . The front surface plate can constitute the outermost surface of the display device.

前表面板的厚度例如可為10 μm以上且1000 μm以下，較佳為20 μm以上且500 μm以下，更佳為30 μm以上且300 μm以下。在本發明中，各層的厚度可按照後述的實施例中說明的厚度測定方法進行測定。The thickness of the front surface plate may be, for example, 10 μm or more and 1000 μm or less, preferably 20 μm or more and 500 μm or less, and more preferably 30 μm or more and 300 μm or less. In the present invention, the thickness of each layer can be measured in accordance with the thickness measurement method described in the below-mentioned Examples.

在前表面板為樹脂製的板狀體的情況下，樹脂製的板狀體只要能夠透射光，則沒有限定。作為構成樹脂膜等樹脂製板狀體的樹脂，例如可列舉三乙醯纖維素、乙醯纖維素丁酸酯、乙烯-乙酸乙烯酯共聚物、丙醯纖維素、丁醯纖維素、乙醯丙醯纖維素、聚酯、聚苯乙烯、聚醯胺、聚醚醯亞胺、聚(甲基)丙烯酸、聚醯亞胺、聚醚碸、聚碸、聚乙烯、聚丙烯、聚甲基戊烯、聚氯乙烯、聚偏二氯乙烯、聚乙烯醇、聚乙烯縮醛、聚醚酮、聚醚醚酮、聚醚碸、聚甲基丙烯酸甲酯、聚對苯二甲酸乙二酯、聚對苯二甲酸丁二酯、聚萘二甲酸乙二酯、聚碳酸酯、聚醯胺醯亞胺等高分子形成的膜。所述高分子可單獨使用或混合兩種以上使用。自提高強度和透明性的觀點出發，較佳為由聚醯亞胺、聚醯胺、聚醯胺醯亞胺等高分子形成的樹脂膜。When the front surface plate is a resin-made plate-shaped body, the resin-made plate-shaped body is not limited as long as it can transmit light. Examples of the resin constituting the resin plate-shaped body such as the resin film include triacetyl cellulose, acetyl cellulose butyrate, ethylene-vinyl acetate copolymer, propylene cellulose, butyl cellulose, and acetyl cellulose. Acrylic cellulose, polyester, polystyrene, polyamide, polyetherimide, poly(meth)acrylic acid, polyimide, polyether turpentine, polysulfide, polyethylene, polypropylene, polymethyl Pentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether ash, polymethyl methacrylate, polyethylene terephthalate , Polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyamide imide and other polymer films. The polymer can be used alone or in combination of two or more. From the viewpoint of improving strength and transparency, a resin film formed of a polymer such as polyimide, polyimide, and polyimide is preferred.

自硬度的觀點出發，前表面板較佳為在基材膜的至少一個面上設置有硬塗層的膜。作為基材膜，能夠使用可由所述樹脂製成的膜。硬塗層可形成在基材膜的一面上，亦可形成在兩面上。藉由設置硬塗層，可製成提高了硬度及劃痕性的樹脂膜。硬塗層例如是紫外線硬化型樹脂的硬化層。作為紫外線硬化型樹脂，例如可列舉：丙烯酸系樹脂、矽酮系樹脂、聚酯系樹脂、胺基甲酸酯系樹脂、醯胺系樹脂、環氧系樹脂等。為了提高硬度，硬塗層可含有添加劑。添加劑沒有限定，可列舉無機系微粒、有機系微粒、或者該些的混合物。From the viewpoint of hardness, the front surface plate is preferably a film in which a hard coat layer is provided on at least one surface of the base film. As the base film, a film that can be made of the resin can be used. The hard coat layer can be formed on one side of the base film or on both sides. By providing a hard coat layer, a resin film with improved hardness and scratch resistance can be made. The hard coat layer is, for example, a cured layer of ultraviolet curable resin. Examples of ultraviolet curable resins include acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. In order to increase the hardness, the hard coat layer may contain additives. The additives are not limited, and examples include inorganic fine particles, organic fine particles, or a mixture of these.

當前表面板為玻璃板時，玻璃板較佳地使用顯示用強化玻璃。玻璃板的厚度例如為10 μm以上且1000 μm以下，亦可為50 μm以上且500 μm以下。藉由使用玻璃板，可構成具有優異的機械強度及表面硬度的前表面板。When the front surface plate is a glass plate, tempered glass for display is preferably used as the glass plate. The thickness of the glass plate is, for example, 10 μm or more and 1000 μm or less, and may be 50 μm or more and 500 μm or less. By using a glass plate, a front surface plate with excellent mechanical strength and surface hardness can be constructed.

當積層體100用於顯示裝置時，前表面板不僅具有保護顯示裝置的前表面（畫面）的功能（作為窗口膜的功能），亦可具有作為觸控感測器的功能、藍光隔斷功能、視角調整功能等。When the laminate 100 is used in a display device, the front surface plate not only has the function of protecting the front surface (screen) of the display device (function as a window film), but also has the function as a touch sensor, a blue light blocking function, Angle adjustment function, etc.

自容易構成具有優異的彎曲性的積層體100的觀點出發，前表面板在溫度23℃下的拉伸彈性係數較佳為4.0 GPa以上，進而佳為5.0 GPa以上。自容易構成具有優異的彎曲性的積層體100的觀點出發，前表面板在溫度23℃下的拉伸彈性係數較佳為20 GPa以下，進而佳為15 GPa以下。拉伸彈性係數可藉由下述實施例欄中記載的試驗方法測定。From the viewpoint of easy formation of the laminate 100 having excellent flexibility, the tensile elastic modulus of the front surface plate at a temperature of 23° C. is preferably 4.0 GPa or more, and more preferably 5.0 GPa or more. From the viewpoint of easy formation of the laminate 100 having excellent flexibility, the tensile elastic modulus of the front surface plate at a temperature of 23° C. is preferably 20 GPa or less, and more preferably 15 GPa or less. The coefficient of tensile elasticity can be measured by the test method described in the following example column.

（基材膜） 基材膜例如可包含樹脂膜，較佳為可包含透明樹脂膜。樹脂膜可以是長條的卷狀樹脂膜，亦可以是單片狀樹脂膜。自能夠連續製造的觀點出發，較佳為長條的卷狀樹脂膜。(Base film) The base film may include a resin film, for example, and preferably may include a transparent resin film. The resin film may be a long roll-shaped resin film or a single-piece resin film. From the viewpoint of continuous production, a long roll-shaped resin film is preferred.

作為構成樹脂膜的樹脂，例如可列舉聚乙烯、聚丙烯、降冰片烯系聚合物、環狀烯烴系樹脂等聚烯烴；聚乙烯醇；聚對苯二甲酸乙二酯；聚甲基丙烯酸酯；聚丙烯酸酯；三乙醯纖維素、二乙醯纖維素及纖維素乙酸酯丙酸酯等纖維素酯；聚萘二甲酸乙二酯；聚碳酸酯；聚碸；聚醚碸；聚醚酮；聚苯硫醚；聚伸苯醚；聚醯胺；聚醯亞胺；聚醯胺醯亞胺等塑膠。其中較佳為環狀烯烴系樹脂、纖維素酯及聚醯亞胺。Examples of the resin constituting the resin film include polyolefins such as polyethylene, polypropylene, norbornene-based polymers, and cyclic olefin-based resins; polyvinyl alcohol; polyethylene terephthalate; polymethacrylate ; Polyacrylate; cellulose esters such as triacetyl cellulose, diethyl cellulose and cellulose acetate propionate; polyethylene naphthalate; polycarbonate; polysulfite; polyether sulfite; poly Ether ketone; polyphenylene sulfide; polyphenylene ether; polyamide; polyimide; polyimide imine and other plastics. Among them, cyclic olefin resins, cellulose esters, and polyimides are preferred.

自積層體100的薄膜化的觀點來看，樹脂膜的厚度較佳為薄，但若過薄，則有難以確保耐衝擊性的傾向。樹脂膜的厚度例如可為10 μm以上且200 μm以下，較佳為15 μm以上且150 μm以下，更佳為20 μm以上且100 μm以下。From the viewpoint of making the laminate 100 thinner, the thickness of the resin film is preferably thin, but if it is too thin, it tends to be difficult to ensure impact resistance. The thickness of the resin film may be, for example, 10 μm or more and 200 μm or less, preferably 15 μm or more and 150 μm or less, and more preferably 20 μm or more and 100 μm or less.

在基材膜上可形成塗層。基材膜可在至少一個表面具有硬塗層、防反射層或防靜電層。基材膜可僅在未形成塗層的一側的表面上形成硬塗層、防反射層、防靜電層等。基材膜亦可僅在形成有塗層的一側的表面上形成有硬塗層、防反射層、防靜電層等。基材膜可包含用於與其他層貼合的接著劑層。A coating can be formed on the substrate film. The base film may have a hard coat layer, an anti-reflection layer, or an anti-static layer on at least one surface. The base film may have a hard coat layer, an anti-reflection layer, an anti-static layer, etc., only on the surface on the side where the coating layer is not formed. The base film may have a hard coat layer, an anti-reflection layer, an anti-static layer, etc., formed only on the surface on the side where the coating layer is formed. The base film may include an adhesive layer for bonding with other layers.

（黏著劑層） 黏著劑層是夾設於兩個層之間並將所述兩個層貼合的層，例如可以是包含黏著劑、接著劑的層或者對該層實施某種處理而成的層。黏著劑亦稱為壓敏式接著劑。本說明書中的「接著劑」是指黏著劑（壓敏式接著劑）以外的接著劑，與黏著劑明確區別。黏著劑層可為一層，亦可包含兩層以上，較佳為一層。黏著劑層可由黏著劑組成物形成。(Adhesive layer) The adhesive layer is a layer that is sandwiched between two layers and bonded to the two layers. For example, it may be a layer containing an adhesive or an adhesive, or a layer obtained by applying a certain treatment to the layer. Adhesives are also called pressure-sensitive adhesives. The "adhesive" in this specification refers to an adhesive other than an adhesive (pressure-sensitive adhesive), and is clearly distinguished from an adhesive. The adhesive layer may be one layer or two or more layers, preferably one layer. The adhesive layer may be formed of an adhesive composition.

黏著劑層可包含以(甲基)丙烯酸系、橡膠系、胺基甲酸酯系、酯系、矽酮系、聚乙烯醚系之類的樹脂為主要成分的黏著劑組成物。其中，較佳為以透明性、耐候性、耐熱性等優異的(甲基)丙烯酸系樹脂為原料聚合物的黏著劑組成物。黏著劑組成物可為活性能量線硬化型、熱硬化型。The adhesive layer may include an adhesive composition mainly composed of (meth)acrylic, rubber, urethane, ester, silicone, or polyvinyl ether resins. Among them, an adhesive composition using a (meth)acrylic resin excellent in transparency, weather resistance, heat resistance, etc., as a base polymer is preferred. The adhesive composition can be an active energy ray hardening type or a heat hardening type.

作為黏著劑組成物中使用的(甲基)丙烯酸系樹脂（原料聚合物），例如可較佳地使用將(甲基)丙烯酸丁酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸異辛酯、(甲基)丙烯酸2-乙基己酯之類的(甲基)丙烯酸酯的一種或兩種以上作為單體的聚合物或共聚物。原料聚合物較佳為使極性單體共聚。作為極性單體，例如可列舉：(甲基)丙烯酸、(甲基)丙烯酸2-羥基丙酯、(甲基)丙烯酸羥基乙酯、(甲基)丙烯醯胺、N,N-二甲基胺基(甲基)丙烯酸乙酯、(甲基)丙烯酸縮水甘油酯之類的具有羧基、羥基、醯胺基、胺基、環氧基等的單體。As the (meth)acrylic resin (raw polymer) used in the adhesive composition, for example, butyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate can be preferably used. A polymer or copolymer in which one or two or more (meth)acrylates such as octyl ester and 2-ethylhexyl (meth)acrylate are used as monomers. The base polymer is preferably copolymerized with a polar monomer. Examples of polar monomers include (meth)acrylic acid, 2-hydroxypropyl (meth)acrylate, hydroxyethyl (meth)acrylate, (meth)acrylamide, N,N-dimethyl Monomers such as amino ethyl (meth)acrylate and glycidyl (meth)acrylate, which have a carboxyl group, a hydroxyl group, an amide group, an amino group, and an epoxy group.

黏著劑組成物可僅含有所述原料聚合物，但通常更含有交聯劑。作為交聯劑，可例示：為2價以上的金屬離子，且與羧基之間形成羧酸金屬鹽者；為多胺化合物，且與羧基之間形成醯胺鍵者；為聚環氧化合物或多元醇，且與羧基之間形成酯鍵者；為聚異氰酸酯化合物，且與羧基之間形成醯胺鍵者。其中，較佳為聚異氰酸酯化合物。The adhesive composition may only contain the base polymer, but usually contains a crosslinking agent. Examples of the crosslinking agent include: a metal ion having a valence of two or more and forming a metal carboxylic acid salt with a carboxyl group; a polyamine compound forming an amide bond with a carboxyl group; a polyepoxy compound or Polyols and those that form ester bonds with carboxyl groups; those that are polyisocyanate compounds and those that form amide bonds with carboxyl groups. Among them, polyisocyanate compounds are preferred.

所謂活性能量線硬化型黏著劑組成物是指如下的黏著劑組成物，具有受到紫外線或電子線之類的活性能量線的照射而硬化的性質，從而具有在活性能量線照射前仍具有黏著性而可與膜等被黏物密著，且藉由活性能量線的照射而硬化，可調整密著力的性質。活性能量射線硬化型黏合劑組成物較佳為紫外線硬化型。活性能量線硬化型黏著劑組成物除了原料聚合物、交聯劑以外，更含有活性能量線聚合性化合物。此外，根據需要，亦含有光聚合起始劑或光敏劑等。The so-called active energy ray-curable adhesive composition refers to the following adhesive composition, which has the property of being irradiated with active energy rays such as ultraviolet rays or electron rays to be cured, and thus has adhesiveness before active energy ray irradiation It can be closely adhered to adherends such as films, and can be cured by the irradiation of active energy rays to adjust the properties of adhesion. The active energy ray curable adhesive composition is preferably an ultraviolet curable adhesive composition. The active energy ray-curable adhesive composition contains an active energy ray polymerizable compound in addition to the raw material polymer and crosslinking agent. In addition, if necessary, a photopolymerization initiator, photosensitizer, and the like are also contained.

黏著劑組成物可含有用於賦予光散射性的微粒子、珠（樹脂珠、玻璃珠等）、玻璃纖維、原料聚合物以外的樹脂、增黏劑、填充劑（金屬粉或其他無機粉末等）、抗氧化劑、紫外線吸收劑、染料、顏料、著色劑、消泡劑、防腐蝕劑、光聚合起始劑等添加劑。The adhesive composition may contain fine particles, beads (resin beads, glass beads, etc.), glass fibers, resins other than raw polymers, tackifiers, fillers (metal powder or other inorganic powders, etc.) for imparting light scattering properties. , Antioxidants, UV absorbers, dyes, pigments, colorants, defoamers, corrosion inhibitors, photopolymerization initiators and other additives.

黏著劑層可藉由將所述黏著劑組成物的有機溶劑稀釋液塗佈在基材上並使其乾燥而形成。使用活性能量線硬化型黏著劑組成物時，藉由對所形成的黏著劑層照射活性能量線，可製成具有所期望的硬化度的硬化物。The adhesive layer can be formed by coating the organic solvent diluent of the adhesive composition on the substrate and drying it. When an active energy ray curable adhesive composition is used, by irradiating the formed adhesive layer with active energy rays, a cured product having a desired degree of curing can be obtained.

黏著劑層的厚度例如較佳為1 μm以上且100 μm以下，更佳為3 μm以上且50 μm以下，還可為20 μm以上。The thickness of the adhesive layer is, for example, preferably 1 μm or more and 100 μm or less, more preferably 3 μm or more and 50 μm or less, and may also be 20 μm or more.

（偏振片層） 作為偏振片層，可列舉吸附了二色性色素的拉伸膜或拉伸層、塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的層等。作為二色性色素，具體而言，可使用碘或二色性的有機染料。二色性有機染料包括包含C.I.直接紅（DIRECT RED）39等雙偶氮化合物的二色性直接染料、包含三偶氮、四偶氮等化合物的二色性直接染料。(Polarizer layer) Examples of the polarizing plate layer include a stretched film or stretched layer in which a dichroic dye is adsorbed, a layer obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound, and the like. As the dichroic dye, specifically, iodine or a dichroic organic dye can be used. Dichroic organic dyes include dichroic direct dyes containing C.I. Direct Red 39 and other bisazo compounds, and dichroic direct dyes containing compounds such as trisazo and tetraazo.

作為塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層，可列舉塗佈含有具有液晶性的二色性色素的組成物或含有二色性色素和聚合性液晶的組成物並使其硬化而得到的層等含有聚合性液晶化合物的硬化物的偏振片層。 塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層與吸附有二色性色素的拉伸膜或拉伸層相比，彎曲方向沒有限制，因此較佳。Examples of the polarizer layer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound include coating a composition containing a liquid crystalline dichroic pigment, or a composition containing a dichroic pigment and polymerizing A polarizer layer containing a cured product of a polymerizable liquid crystal compound, such as a layer obtained by curing the composition of a liquid crystal. The polarizer layer formed by coating and hardening a composition containing a dichroic dye and a polymerizable compound has no limitation on the bending direction compared to a stretched film or a stretched layer to which the dichroic dye is adsorbed, so it is better .

（（作為拉伸膜或拉伸層的偏振片層）） 作為吸附了二色性色素的拉伸膜的偏振片層通常可經由如下步驟而製造：將聚乙烯醇系樹脂膜單軸拉伸的步驟；藉由用二色性色素對聚乙烯醇系樹脂膜進行染色來吸附該二色性色素的步驟；利用硼酸水溶液對吸附了二色性色素的聚乙烯醇系樹脂膜進行處理的步驟；以及在利用硼酸水溶液進行處理後進行水洗的步驟。 偏振片層的厚度例如為2 μm以上40 μm以下。偏振片層的厚度可為5 μm以上，亦可為20 μm以下，進而為15 μm以下，進一步可為10 μm以下。((As a polarizer layer of a stretched film or stretched layer)) The polarizing plate layer as a stretched film to which the dichroic dye is adsorbed can usually be produced through the following steps: a step of uniaxially stretching a polyvinyl alcohol-based resin film; The step of dyeing the film to adsorb the dichroic pigment; the step of treating the polyvinyl alcohol resin film with the dichroic pigment adsorbed with the boric acid aqueous solution; and the step of washing with water after the treatment with the boric acid aqueous solution. The thickness of the polarizer layer is, for example, 2 μm or more and 40 μm or less. The thickness of the polarizer layer may be 5 μm or more, 20 μm or less, further 15 μm or less, and further may be 10 μm or less.

聚乙烯醇系樹脂藉由將聚乙酸乙烯酯系樹脂皂化而得到。作為聚乙酸乙烯酯系樹脂，除了作為乙酸乙烯酯的均聚物的聚乙酸乙烯酯以外，還使用乙酸乙烯酯和能夠與其共聚的其他單體的共聚物。作為能夠與乙酸乙烯酯共聚的其他單體，例如可列舉：不飽和羧酸類、烯烴類、乙烯基醚類、不飽和磺酸類、具有銨基的(甲基)丙烯醯胺類等。The polyvinyl alcohol-based resin is obtained by saponifying a polyvinyl acetate-based resin. As the polyvinyl acetate-based resin, in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer of vinyl acetate and other monomers 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.

聚乙烯醇系樹脂的皂化度通常為85莫耳%以上且100莫耳%以下左右，較佳為98莫耳%以上。聚乙烯醇系樹脂可被改質，例如可使用經醛類改質的聚乙烯醇縮甲醛或聚乙烯縮醛。聚乙烯醇系樹脂的聚合度通常為1000以上且10000以下，較佳為1500以上且5000以下。The degree of saponification of the polyvinyl alcohol-based resin is usually about 85 mol% or more and 100 mol% or less, preferably 98 mol% or more. The polyvinyl alcohol-based resin can be modified. For example, polyvinyl formal or polyvinyl acetal modified with aldehydes can be used. The degree of polymerization of the polyvinyl alcohol resin is usually 1,000 or more and 10,000 or less, preferably 1,500 or more and 5,000 or less.

作為吸附了二色性色素的拉伸層的偏振片層通常可經由如下步驟而製造：將含有所述聚乙烯醇系樹脂的塗佈液塗佈在基材膜上的步驟、將得到的積層膜單軸拉伸的步驟、將經單軸拉伸的積層膜的聚乙烯醇系樹脂層用二色性色素染色，藉此吸附該二色性色素而製成偏振片層的步驟、用硼酸水溶液處理吸附了二色性色素的膜的步驟、以及用硼酸水溶液處理後進行水洗的步驟。 根據需要，可自偏振片層剝離除去基材膜。基材膜的材料及厚度可與後述的熱塑性樹脂膜的材料及厚度相同。The polarizing plate layer, which is the stretched layer to which the dichroic dye is adsorbed, can usually be manufactured through the following steps: a step of applying a coating solution containing the polyvinyl alcohol-based resin on a base film, and the resulting laminate The step of uniaxial stretching of the film, the step of dyeing the polyvinyl alcohol resin layer of the uniaxially stretched laminate film with a dichroic dye, thereby adsorbing the dichroic dye to form a polarizer layer, using boric acid A step of treating a film with a dichroic dye adsorbed in an aqueous solution, and a step of washing with water after treatment with an aqueous boric acid solution. If necessary, the base film can be peeled and removed from the polarizer layer. The material and thickness of the base film may be the same as the material and thickness of the thermoplastic resin film described later.

作為拉伸膜或拉伸層的偏振片層亦可以在其單面或雙面貼合有熱塑性樹脂膜的形態組裝到積層體中。該熱塑性樹脂膜可作為偏振片層用的保護膜或相位差膜發揮功能。熱塑性樹脂膜例如為包含如下樹脂的膜，即，鏈狀聚烯烴系樹脂（聚丙烯系樹脂等）、環狀聚烯烴系樹脂（降冰片烯系樹脂等）等聚烯烴系樹脂；三乙醯纖維素等纖維素系樹脂；聚對苯二甲酸乙二酯、聚萘二甲酸乙二酯、聚對苯二甲酸丁二酯等聚酯系樹脂；聚碳酸酯系樹脂；(甲基)丙烯酸系樹脂；或者該些的混合物等。The polarizing plate layer as a stretched film or a stretched layer may be assembled in a laminate in a form in which a thermoplastic resin film is bonded on one or both sides. This thermoplastic resin film can function as a protective film or retardation film for a polarizer layer. The thermoplastic resin film is, for example, a film containing resins such as polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.) and cyclic polyolefin resins (norbornene resins, etc.); triacetin Cellulose resins such as cellulose; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate resins; (meth)acrylic acid Resin; or a mixture of these.

自薄型化的觀點出發，熱塑性樹脂膜的厚度通常為300 μm以下，較佳為200 μm以下，更佳為100 μm以下，進而佳為80 μm以下，進一步佳為60 μm以下，另外通常為5 μm以上，較佳為20 μm以上。From the viewpoint of thinning, the thickness of the thermoplastic resin film is usually 300 μm or less, preferably 200 μm or less, more preferably 100 μm or less, still more preferably 80 μm or less, further preferably 60 μm or less, and usually 5 μm or more, preferably 20 μm or more.

熱塑性樹脂膜可具有相位差，亦可不具有相位差。The thermoplastic resin film may or may not have a phase difference.

熱塑性樹脂膜例如可使用接著劑層貼合在偏振片層上。The thermoplastic resin film can be bonded to the polarizer layer using an adhesive layer, for example.

（（塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層）） 作為塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層，可列舉如下的層等含有聚合性液晶化合物的硬化物的偏振片層，即，將包含具有液晶性的聚合性的二色性色素的組成物或包含二色性色素與聚合性液晶的組成物塗佈於基材膜並使其硬化而得到的層。((Polarizer layer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound)) Examples of the polarizer layer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound include the following layers, such as a polarizer layer containing a cured product of a polymerizable liquid crystal compound, which includes A layer obtained by applying a liquid crystalline polymerizable dichroic dye composition or a composition containing a dichroic dye and a polymerizable liquid crystal to a base film and curing it.

根據需要，可自偏振片層剝離除去基材膜。基材膜的材料及厚度可與所述熱塑性樹脂膜的材料及厚度相同。If necessary, the base film can be peeled and removed from the polarizer layer. The material and thickness of the base film may be the same as the material and thickness of the thermoplastic resin film.

塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層可以在其一面或兩面貼合有熱塑性樹脂膜的形態組裝到光學積層體中。作為熱塑性樹脂膜，可使用與作為拉伸膜或拉伸層的偏振片層中可使用的熱塑性樹脂膜相同者。熱塑性樹脂膜例如可使用接著劑層貼合在偏振片層上。The polarizer layer formed by applying and curing a composition containing a dichroic dye and a polymerizable compound can be assembled in an optical laminate in a form in which a thermoplastic resin film is bonded on one or both surfaces. As the thermoplastic resin film, the same ones as those that can be used in the polarizing plate layer as the stretched film or stretched layer can be used. The thermoplastic resin film can be bonded to the polarizer layer using an adhesive layer, for example.

塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層的厚度通常為10 μm以下，較佳為0.5 μm以上8 μm以下，更佳為1 μm以上5 μm以下。The thickness of the polarizer layer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound is usually 10 μm or less, preferably 0.5 μm or more and 8 μm or less, and more preferably 1 μm or more and 5 μm the following.

夾設塗層12可包含例如塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層。作為包含彼此接觸的基材層15及夾設塗層12的結構，可列舉：在基材膜上形成有塗佈包含二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層的結構、在塗佈包含二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層上貼合熱塑性樹脂膜的結構。夾設塗層12包含塗佈含有二色性色素及聚合性化合物的組成物並使其硬化而成的偏振片層時，夾設塗層12可更包含作為塗層的一種的配向膜、保護層（具體而言為硬塗（hard coat，HC）層或外塗（over coat，OC）層）等。The interlayer coating layer 12 may include, for example, a polarizer layer obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound. Examples of the structure including the substrate layer 15 and the interposed coating layer 12 that are in contact with each other include: a polarizer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound on the substrate film The structure of the sheet layer is a structure in which a thermoplastic resin film is bonded to a polarizer layer formed by coating and curing a composition containing a dichroic dye and a polymerizable compound. When the interlayer coating layer 12 includes a polarizer layer formed by coating and hardening a composition containing a dichroic dye and a polymerizable compound, the interlayer coating layer 12 may further include an alignment film, which is a kind of coating, and a protective layer. Layer (specifically, a hard coat (HC) layer or an over coat (OC) layer), etc.

（相位差層） 積層體100可包括一層或兩層以上的相位差層。相位差層通常配置在偏振片層與背面板之間。相位差層經由第一黏著劑層11、第二黏著劑層13、或該些層以外的包含黏著劑或著接著劑的層（以下亦稱為貼合層）而積層在其他層（包含其他相位差層）上。(Retardation layer) The laminated body 100 may include one layer or two or more retardation layers. The retardation layer is usually arranged between the polarizing plate layer and the back plate. The retardation layer is laminated on other layers (including other layers) through the first adhesive layer 11, the second adhesive layer 13, or a layer other than these layers containing an adhesive or adhesive (hereinafter also referred to as an adhesive layer) Retardation layer).

相位差層可以是λ/4板、λ/2板等正A板、及正C板。相位差層可以是作為所述保護膜的材料而例示的樹脂膜，亦可以是使聚合性液晶化合物硬化而成的層。相位差層可更含有配向膜或基材膜。相位差層的厚度例如為0.1 μm以上且10 μm以下，較佳為0.5 μm以上且8 μm以下，更佳為1 μm以上且6 μm以下。The retardation layer may be a positive A plate such as a λ/4 plate and a λ/2 plate, and a positive C plate. The retardation layer may be a resin film exemplified as a material of the protective film, or a layer formed by curing a polymerizable liquid crystal compound. The retardation layer may further contain an alignment film or a base film. The thickness of the retardation layer is, for example, 0.1 μm or more and 10 μm or less, preferably 0.5 μm or more and 8 μm or less, and more preferably 1 μm or more and 6 μm or less.

使聚合性液晶化合物硬化而成的相位差層可藉由將含有聚合性液晶化合物的組成物塗佈在基材膜上並使其硬化而形成。在基材膜和塗層之間可形成配向層。基材膜的材料及厚度可與所述熱塑性樹脂膜的材料及厚度相同。 使聚合性液晶化合物硬化而成的相位差層亦可以具有配向層及/或基材膜的形態組裝入積層體100中。The retardation layer formed by curing the polymerizable liquid crystal compound can be formed by coating a composition containing the polymerizable liquid crystal compound on a base film and curing it. An alignment layer can be formed between the base film and the coating. The material and thickness of the base film may be the same as the material and thickness of the thermoplastic resin film. The retardation layer formed by curing the polymerizable liquid crystal compound may be incorporated in the laminate 100 in a form having an alignment layer and/or a base film.

夾設塗層12例如可包含使聚合性液晶化合物硬化而成的相位差層。作為包含彼此接觸的基材層15及夾設塗層12的結構，可列舉在基材膜上形成有使聚合性液晶化合物硬化而成的相位差層的結構。夾設塗層12包含使聚合性液晶化合物硬化而成的相位差層時，夾設塗層12可更包含作為塗層的一種的配向膜、保護層（具體而言，可舉出硬塗層或外塗層）等。The interlayer coating layer 12 may include, for example, a retardation layer formed by curing a polymerizable liquid crystal compound. As a structure including the base material layer 15 and the interposed coating layer 12 in contact with each other, a structure in which a phase difference layer formed by curing a polymerizable liquid crystal compound is formed on a base film is mentioned. When the interposition coating layer 12 includes a retardation layer formed by hardening a polymerizable liquid crystal compound, the interposition coating layer 12 may further include an alignment film and a protective layer as a kind of coating (specifically, a hard coat layer Or outer coating) etc.

（觸控感測器面板） 觸控感測器面板只要是能夠檢測被觸控的位置的感測器，則檢測方式不受限定，可例示電阻膜方式、靜電電容方式、光感測器方式、超音波方式、電磁感應耦合方式、表面彈性波方式等的觸控感測器面板。其中，就低成本、快速反應速度、薄膜化方面而言，較佳地使用靜電電容方式的觸控感測器面板。觸控感測器面板可在透明導電層與支撐該透明導電層的基材膜之間具備接著層、分離層、保護層等。作為接著層，可列舉接著劑層、黏著劑層。作為支撐透明導電層的基材膜，可列舉在一個表面蒸鍍形成有透明導電層的基材膜、經由接著層轉印有透明導電層的基材膜等。(Touch sensor panel) The detection method of the touch sensor panel is not limited as long as it is a sensor capable of detecting the touched position, and examples of resistive film method, electrostatic capacitance method, photo sensor method, ultrasonic method, electromagnetic induction coupling Touch sensor panels such as the method and surface elastic wave method. Among them, in terms of low cost, fast response speed, and thin film, it is preferable to use an electrostatic capacitive touch sensor panel. The touch sensor panel may be provided with an adhesive layer, a separation layer, a protective layer, etc. between the transparent conductive layer and the base film supporting the transparent conductive layer. Examples of the adhesive layer include an adhesive layer and an adhesive layer. Examples of the base film supporting the transparent conductive layer include a base film having a transparent conductive layer deposited on one surface, a base film having a transparent conductive layer transferred via an adhesive layer, and the like.

靜電電容方式的觸控感測器面板的一例包括：基材膜、設置在基材膜的表面上的用於位置檢測的透明導電層、以及觸控位置檢測電路。在設置有包括靜電電容方式的觸控感測器面板的光學積層體的顯示裝置中，當前表面板的表面被觸控時，在所觸控的點，透明導電層經由人體的靜電電容而接地。觸控位置檢測電路檢測到透明導電層的接地，從而檢測被觸控的位置。藉由具有相互分離的多個透明導電層，能夠進行更詳細的位置檢測。An example of the capacitive touch sensor panel includes a base film, a transparent conductive layer for position detection provided on the surface of the base film, and a touch position detection circuit. In a display device provided with an optical laminate including an electrostatic capacitive touch sensor panel, when the surface of the front surface plate is touched, at the touched point, the transparent conductive layer is grounded via the electrostatic capacitance of the human body . The touch position detection circuit detects the grounding of the transparent conductive layer, thereby detecting the touched position. By having multiple transparent conductive layers separated from each other, more detailed position detection can be performed.

透明導電層可為包含氧化銦錫（Indium Tin Oxide，ITO）等金屬氧化物的透明導電層，亦可為包含鋁或銅、銀、金或者該些的合金等金屬的金屬層。透明電極層藉由濺射法、印刷法、蒸鍍法等塗佈法形成。在透明電極層上形成感光性抗蝕劑，之後藉由光微影術形成電極圖案層。感光性抗蝕劑使用負片型感光性抗蝕劑或正片型感光性抗蝕劑，圖案化後感光性抗蝕劑可殘存，亦可除去。在藉由濺射法製膜的情況下，亦可配置具有電極圖案形狀的遮罩，進行濺射，而形成電極圖案層。The transparent conductive layer may be a transparent conductive layer containing metal oxides such as indium tin oxide (ITO), or a metal layer containing metals such as aluminum, copper, silver, gold, or alloys of these. The transparent electrode layer is formed by coating methods such as sputtering, printing, and vapor deposition. A photosensitive resist is formed on the transparent electrode layer, and then the electrode pattern layer is formed by photolithography. As the photosensitive resist, a negative type photosensitive resist or a positive type photosensitive resist is used, and the photosensitive resist may remain after patterning or may be removed. In the case of film formation by a sputtering method, a mask having an electrode pattern shape may be arranged, and sputtering may be performed to form an electrode pattern layer.

分離層可為形成在玻璃等基板上、用於將在分離層上形成的透明導電層與分離層一起自基板分離的層。分離層較佳為無機物層或有機物層。作為形成無機物層的材料，例如可舉出矽氧化物。作為形成有機物層的材料，例如可使用(甲基)丙烯酸系樹脂組成物、環氧系樹脂組成物、聚醯亞胺系樹脂組成物等。分離層可用公知的塗佈法塗佈，並藉由熱硬化或紫外線（ultraviolet，UV）硬化或該些的組合的方法進行硬化而形成。The separation layer may be a layer formed on a substrate such as glass to separate the transparent conductive layer formed on the separation layer from the substrate together with the separation layer. The separation layer is preferably an inorganic layer or an organic layer. Examples of the material forming the inorganic layer include silicon oxide. As a material for forming the organic layer, for example, a (meth)acrylic resin composition, an epoxy resin composition, a polyimide resin composition, etc. can be used. The separation layer can be coated by a well-known coating method, and is formed by curing by thermal curing, ultraviolet (UV) curing, or a combination of these methods.

保護層可設置成與透明導電層接觸以保護導電層。保護層包含有機絕緣膜及無機絕緣膜中的至少一種，該些膜可藉由旋塗法、濺射法、蒸鍍法等塗佈法形成。The protective layer may be provided in contact with the transparent conductive layer to protect the conductive layer. The protective layer includes at least one of an organic insulating film and an inorganic insulating film, and these films can be formed by coating methods such as spin coating, sputtering, and vapor deposition.

絕緣層例如可包含矽氧化物等無機絕緣物質、丙烯酸系樹脂等透明有機物質。絕緣層可用公知的塗佈法塗佈後，藉由熱硬化、UV硬化、熱乾燥、真空乾燥等而形成。The insulating layer may include, for example, inorganic insulating materials such as silicon oxide, and transparent organic materials such as acrylic resin. The insulating layer can be coated by a known coating method and then formed by thermal curing, UV curing, thermal drying, vacuum drying, or the like.

作為觸控感測器面板的基材膜，可列舉三乙醯纖維素、聚對苯二甲酸乙二酯、環烯烴聚合物、聚萘二甲酸乙二酯、聚烯烴、聚環烯烴、聚碳酸酯、聚醚碸、聚芳酯、聚醯亞胺、聚醯胺、聚苯乙烯、聚降冰片烯等的樹脂膜。自容易構成具有所期望的韌性的基材膜的觀點出發，較佳地使用聚對苯二甲酸乙二酯。As the base film of the touch sensor panel, triacetyl cellulose, polyethylene terephthalate, cycloolefin polymer, polyethylene naphthalate, polyolefin, polycycloolefin, poly Resin films such as carbonate, polyether agglomerate, polyarylate, polyimide, polyamide, polystyrene, polynorbornene, etc. From the viewpoint of easily forming a base film having desired toughness, polyethylene terephthalate is preferably used.

自容易構成具有優異的耐彎曲性的光學積層體的觀點出發，觸控感測器面板的基材膜的厚度較佳為50 μm以下，進而佳為30 μm以下。觸控感測器面板的基材膜的厚度例如為5 μm以上。From the viewpoint of easy formation of an optical laminate having excellent bending resistance, the thickness of the base film of the touch sensor panel is preferably 50 μm or less, and more preferably 30 μm or less. The thickness of the base film of the touch sensor panel is, for example, 5 μm or more.

觸控感測器面板例如可按下方式進行製造。在第一方法中，首先將基材膜經由接著層積層在基板上。在基材膜上形成藉由光微影術而圖案化的透明導電層。藉由加熱，將基板和基材膜分離，從而得到包含透明導電層和基材膜的觸控感測器面板。基板只要是維持平坦性、具有耐熱性的基板，就沒有特別限定，但較佳為玻璃基板。The touch sensor panel can be manufactured in a pressing manner, for example. In the first method, the base film is first laminated on the substrate via the subsequent lamination. A transparent conductive layer patterned by photolithography is formed on the base film. By heating, the substrate and the base film are separated, thereby obtaining a touch sensor panel including a transparent conductive layer and a base film. The substrate is not particularly limited as long as it maintains flatness and has heat resistance, but it is preferably a glass substrate.

在第二方法中，首先在基板上塗佈形成分離層的材料，形成分離層。視需要，在分離層上藉由塗佈來形成保護層。保護層可按照在形成焊盤圖案層的部分中不形成保護層的方式形成。在分離層（或保護層）上形成藉由光微影術而圖案化的透明導電層。在透明導電層上，以填埋電極圖案層的方式形成絕緣層。在絕緣層上用可剝離的黏著劑積層保護膜，自絕緣層轉印至分離層，分離基板。藉由剝離可剝離的保護膜，可得到依次具有絕緣層/透明導電層/（保護層）/分離層的觸控感測器面板。In the second method, the material for forming the separation layer is first coated on the substrate to form the separation layer. If necessary, a protective layer is formed by coating on the separation layer. The protective layer may be formed in such a manner that the protective layer is not formed in the portion where the land pattern layer is formed. A transparent conductive layer patterned by photolithography is formed on the separation layer (or protective layer). On the transparent conductive layer, an insulating layer is formed by filling the electrode pattern layer. Laminate a protective film on the insulating layer with a peelable adhesive, transfer from the insulating layer to the separation layer, and separate the substrate. By peeling off the peelable protective film, a touch sensor panel having an insulating layer/transparent conductive layer/(protective layer)/separation layer in this order can be obtained.

當包括基材膜時，觸控感測器面板的厚度例如可為5 μm以上2000 μm以下，亦可為5 μm以上100 μm以下。When the base film is included, the thickness of the touch sensor panel may be, for example, 5 μm or more and 2000 μm or less, or 5 μm or more and 100 μm or less.

當不包括基材膜時，觸控感測器面板的厚度例如為0.5 μm以上10 μm以下，並且較佳為5 μm以下。When the base film is not included, the thickness of the touch sensor panel is, for example, 0.5 μm or more and 10 μm or less, and preferably 5 μm or less.

夾設塗層12例如可包含藉由第二方法製作的觸控感測器面板。作為包含彼此接觸的基材層15及夾設塗層12的結構，可列舉：將藉由所述第一方法製作的觸控感測器面板、基材膜與藉由所述第二方法製作的觸控感測器面板用接著劑貼合而成的結構。The sandwich coating 12 may include, for example, a touch sensor panel manufactured by the second method. Examples of the structure including the substrate layer 15 and the interposed coating layer 12 that are in contact with each other include: a touch sensor panel manufactured by the first method, a substrate film, and a substrate film manufactured by the second method. The touch sensor panel is laminated with an adhesive.

（貼合層） 貼合層是包含黏著劑或接著劑的層。貼合層例如可以是貼合前表面板與觸控感測器面板的層、貼合前表面板與偏光板的層、貼合偏光板與觸控感測器面板的層。構成貼合層的黏著劑可以是與對於構成黏著劑層的黏著劑組成物例示的黏著劑相同的黏著劑，亦可以是其他黏著劑，例如(甲基)丙烯酸系黏著劑、苯乙烯系黏著劑、矽酮系黏著劑、橡膠系黏著劑、胺基甲酸酯系黏著劑、聚酯系黏著劑、環氧系共聚物黏著劑等。積層體100可具備一個貼合層，亦可具備兩個以上。在積層體100具備多個貼合層的情況下，多個貼合層彼此可相同，亦可不同。(Laminated layer) The bonding layer is a layer containing an adhesive or adhesive. The bonding layer may be, for example, a layer bonding the front surface plate and the touch sensor panel, a layer bonding the front surface plate and a polarizing plate, or a layer bonding the polarizing plate and the touch sensor panel. The adhesive constituting the bonding layer may be the same adhesive as the adhesive exemplified for the adhesive composition constituting the adhesive layer, or other adhesives such as (meth)acrylic adhesives, styrene adhesives Adhesives, silicone adhesives, rubber adhesives, urethane adhesives, polyester adhesives, epoxy copolymer adhesives, etc. The laminate 100 may include one bonding layer, or may include two or more. When the laminated body 100 includes a plurality of bonding layers, the plurality of bonding layers may be the same as or different from each other.

作為構成貼合層的接著劑，例如可將水系接著劑、活性能量線硬化型接著劑、黏著劑等中的一種或兩種以上組合而形成。作為水系接著劑，例如可列舉聚乙烯醇系樹脂水溶液、水系二液型胺基甲酸酯系乳液接著劑等。作為活性能量線硬化型接著劑，是藉由照射紫外線等活性能量線而硬化的接著劑，例如可列舉含有聚合性化合物及光聚合性起始劑的接著劑、含有光反應性樹脂的接著劑、含有黏合劑樹脂及光反應***聯劑的接著劑等。作為所述聚合性化合物，可列舉光硬化性環氧系單體、光硬化性丙烯酸系單體、光硬化性胺基甲酸酯系單體等光聚合性單體、來自該些單體的寡聚物等。作為所述光聚合起始劑，可列舉包含藉由照射紫外線等活性能量線而產生中性自由基、陰離子自由基、陽離子自由基等活性種的物質的光聚合起始劑。As the adhesive agent constituting the bonding layer, for example, one or two or more of a water-based adhesive agent, an active energy ray curable adhesive agent, an adhesive, and the like can be combined and formed. Examples of the water-based adhesive include a polyvinyl alcohol-based resin aqueous solution, an aqueous two-component urethane-based emulsion adhesive, and the like. The active energy ray curable adhesive is an adhesive that is cured by irradiating active energy rays such as ultraviolet rays. Examples include adhesives containing polymerizable compounds and photopolymerizable initiators, and adhesives containing photoreactive resins. , Adhesives containing adhesive resins and photoreactive crosslinking agents, etc. Examples of the polymerizable compound include photopolymerizable monomers such as photocurable epoxy monomers, photocurable acrylic monomers, and photocurable urethane monomers, and those derived from these monomers. Oligomers and so on. Examples of the photopolymerization initiator include photopolymerization initiators containing substances that generate active species such as neutral radicals, anionic radicals, and cationic radicals by irradiation with active energy rays such as ultraviolet rays.

貼合層的厚度例如可為1 μm以上，較佳為1 μm以上25 μm以下，更佳為2 μm以上15 μm以下，進而佳為2.5 μm以上5 μm以下。The thickness of the bonding layer may be, for example, 1 μm or more, preferably 1 μm or more and 25 μm or less, more preferably 2 μm or more and 15 μm or less, and still more preferably 2.5 μm or more and 5 μm or less.

（背面板） 作為背面板，能夠使用可透射光的板狀體、通常的顯示裝置中使用的構成要素等。(Back panel) As the back plate, a light-transmissive plate-shaped body, a component used in a normal display device, and the like can be used.

背面板的厚度例如可為5 μm以上且2000 μm以下，較佳為10 μm以上且1000 μm以下，更佳為15 μm以上且500 μm以下。The thickness of the back plate may be, for example, 5 μm or more and 2000 μm or less, preferably 10 μm or more and 1000 μm or less, and more preferably 15 μm or more and 500 μm or less.

作為用於背面板的板狀體，可僅包含一層，亦可包含兩層以上，可使用對所述前表面板中所述的板狀體例示的板狀體。The plate-shaped body used for the back panel may include only one layer or two or more layers, and a plate-shaped body exemplified for the plate-shaped body described in the front surface panel can be used.

作為用於背面板的通常的顯示裝置所使用的構成要素，例如可列舉觸控感測器面板、有機EL顯示元件等。作為顯示裝置中的構成要素的積層順序，例如可列舉：窗口膜/圓偏光板/觸控感測器面板/有機EL顯示元件、窗口膜/觸控感測器面板/圓偏光板/有機EL顯示元件等。As constituent elements used in a normal display device used for a back panel, for example, a touch sensor panel, an organic EL display element, etc. can be cited. Examples of the stacking order of the constituent elements in the display device include: window film/circular polarizer/touch sensor panel/organic EL display element, window film/touch sensor panel/circular polarizer/organic EL Display components, etc.

自容易構成具有優異的彎曲性的積層體100的觀點出發，背面板在溫度23℃下的拉伸彈性係數較佳為4.0 GPa以上，進而佳為4.5 GPa以上。自容易構成具有優異的彎曲性的積層體100的觀點出發，背面板在溫度23℃下的拉伸彈性係數較佳為20 GPa以下，進而佳為15 GPa以下。拉伸彈性係數可藉由下述實施例欄中記載的試驗方法來測定。From the viewpoint of easy formation of the laminate 100 having excellent flexibility, the tensile modulus of elasticity of the back sheet at a temperature of 23° C. is preferably 4.0 GPa or more, and more preferably 4.5 GPa or more. From the viewpoint of easy formation of the laminate 100 having excellent flexibility, the tensile modulus of elasticity of the back sheet at a temperature of 23° C. is preferably 20 GPa or less, and more preferably 15 GPa or less. The coefficient of tensile elasticity can be measured by the test method described in the following example column.

[積層體的製造方法] 積層體100可藉由包括如下步驟的方法來製造，即，經由黏著劑層或者接著劑層將構成積層體100的層彼此貼合的步驟。在經由黏著劑層或者接著劑層將層彼此貼合的情況下，為了提高密著性，較佳為對貼合面的一方或雙方實施例如電暈處理等表面活性化處理。[Method of manufacturing laminate] The laminated body 100 can be manufactured by a method including the step of bonding the layers constituting the laminated body 100 to each other via an adhesive layer or an adhesive layer. When bonding the layers to each other via an adhesive layer or an adhesive layer, in order to improve adhesion, it is preferable to perform surface activation treatment such as corona treatment on one or both of the bonding surfaces.

＜顯示裝置＞ 本發明的顯示裝置包括所述本發明的積層體100。顯示裝置沒有特別限定，例如可列舉有機EL顯示裝置、無機EL顯示裝置、液晶顯示裝置、電場發光顯示裝置等圖像顯示裝置。顯示裝置可具有觸控面板功能。光學積層體適於具有可彎曲或折彎等的可撓性的顯示裝置。＜Display device＞ The display device of the present invention includes the laminate 100 of the present invention. The display device is not particularly limited, and examples thereof include image display devices such as organic EL display devices, inorganic EL display devices, liquid crystal display devices, and electroluminescence display devices. The display device may have a touch panel function. The optical laminate is suitable for a display device having flexibility such as bendability or bending.

在顯示裝置中，光學積層體使前表面板朝向外側（顯示元件側的相反側，即視認側）而配置在顯示裝置所具有的顯示元件的視認側。In the display device, the optical laminate is arranged on the visibility side of the display element included in the display device with the front surface plate facing outward (the side opposite to the display element side, that is, the visibility side).

本發明的顯示裝置可用作智慧型手機、輸入板等移動設備、電視、數位相框、電子廣告牌、測定器或儀錶類、辦公用設備、醫療設備、計算機設備等。 [實施例]The display device of the present invention can be used as mobile devices such as smart phones, input tablets, televisions, digital photo frames, electronic billboards, measuring devices or meters, office equipment, medical equipment, computer equipment, etc. [Example]

以下，列舉實施例來更詳細地說明本發明，但本發明並不限定於該些實施例。Hereinafter, examples are given to explain the present invention in more detail, but the present invention is not limited to these examples.

＜包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體＞ （基材膜） 作為基材膜，準備三乙醯纖維素（Triacetyl Cellulose，TAC）膜（柯尼卡美能達（Konica Minolta）股份有限公司製、厚度25 μm）。<Laminated body containing "base film/first alignment film/polarizer layer/protective layer (OC layer)"> (Base film) As the base film, a Triacetyl Cellulose (TAC) film (manufactured by Konica Minolta Co., Ltd., thickness 25 μm) was prepared.

（配向膜形成用組成物） 聚合物1是具有包含以下結構單元的光反應性基的聚合物。

Figure 02_image001
藉由凝膠滲透層析法（Gel Permeation Chromatography，GPC）測定得到的聚合物1的分子量顯示數量平均分子量28200、Mw/Mn1.82，單體含量為0.5%。 將聚合物1以濃度5質量%溶解於環戊酮中而得的溶液用作配向膜形成用組成物。(Composition for forming an alignment film) The polymer 1 is a polymer having a photoreactive group including the following structural unit.
Figure 02_image001
The molecular weight of polymer 1 measured by Gel Permeation Chromatography (GPC) showed a number average molecular weight of 28200, Mw/Mn 1.82, and a monomer content of 0.5%. A solution obtained by dissolving the polymer 1 in cyclopentanone at a concentration of 5% by mass was used as the composition for forming an alignment film.

（聚合性液晶化合物） 聚合性液晶化合物使用式（1-6）所表示的聚合性液晶化合物[以下亦稱為化合物（1-6）]和式（1-7）所表示的聚合性液晶化合物[以下亦稱為化合物（1-7）]。

Figure 02_image003
Figure 02_image005
(Polymerizable liquid crystal compound) As the polymerizable liquid crystal compound, a polymerizable liquid crystal compound represented by formula (1-6) [hereinafter also referred to as compound (1-6)] and a polymerizable liquid crystal compound represented by formula (1-7) are used [Hereinafter also referred to as compound (1-7)].
Figure 02_image003
Figure 02_image005

化合物（1-6）及化合物（1-7）藉由路伯等人（Lub et al.）著、《荷蘭皇家化學期刊，Recl.Trav.Chim.Pays-bas》、115、321-328（1996）中記載的方法而合成。Compounds (1-6) and compounds (1-7) were written by Lub et al., "Royal Dutch Journal of Chemistry, Recl.Trav.Chim.Pays-bas", 115, 321-328 ( It was synthesized by the method described in 1996).

（二色性色素） 二色性色素使用下述式（2-1a）、（2-1b）、（2-3a）所示的日本專利特開2013-101328號公報的實施例中記載的偶氮色素。

Figure 02_image007
Figure 02_image008
Figure 02_image009
(Dichroic Dye) As the dichroic dye, the dichroic dye shown in the following formulas (2-1a), (2-1b), and (2-3a) described in the examples of Japanese Patent Laid-Open No. 2013-101328 was used. Nitrogen pigment.
Figure 02_image007
Figure 02_image008
Figure 02_image009

（偏振片層形成用組成物） 偏振片層形成用組成物藉由如下步驟來製造，即，在作為溶劑的甲苯400質量份中，混合75質量份化合物（1-6）、25質量份化合物（1-7）、作為二色性染料的所述式（2-1a）、（2-1b）、（2-3a）所示的偶氮色素各2.5質量份、作為聚合起始劑的2-二甲基胺基-2-苄基-1-(4-嗎啉基苯基)丁烷-1-酮（豔佳固（Irgacure）369、日本巴斯夫（BASF）公司製）6質量份、以及作為調平劑的聚丙烯酸酯化合物（BYK-361N、畢克化學（BYK-Chemie）公司製）1.2質量份，將得到的混合物在80℃下攪拌1小時。(Composition for forming polarizer layer) The composition for forming a polarizing plate layer is manufactured by mixing 75 parts by mass of compound (1-6) and 25 parts by mass of compound (1-7) in 400 parts by mass of toluene as a solvent as a two-color 2.5 parts by mass each of the azo dyes represented by the formulas (2-1a), (2-1b), and (2-3a) of the sexual dye, 2-dimethylamino-2- as a polymerization initiator Benzyl-1-(4-morpholinylphenyl)butan-1-one (Irgacure 369, manufactured by BASF Corporation) 6 parts by mass, and polyacrylate as a leveling agent 1.2 parts by mass of the compound (BYK-361N, manufactured by BYK-Chemie), and the obtained mixture was stirred at 80°C for 1 hour.

（保護層（OC層）用組成物） 保護層用組成物是藉由相對於水100質量份，混合聚乙烯醇樹脂粉末（可樂麗（Kuraray）股份有限公司製、平均聚合度18000、商品名：KL-318）3質量份、聚醯胺環氧樹脂（交聯劑、住化化學（Chemtex）股份有限公司製、商品名：SR650（30））1.5質量份而製備。(Composition for protective layer (OC layer)) The composition for the protective layer is made by mixing 3 parts by mass of polyvinyl alcohol resin powder (manufactured by Kuraray Co., Ltd., with an average degree of polymerization of 18000, trade name: KL-318) with respect to 100 parts by mass of water. Amine epoxy resin (crosslinking agent, manufactured by Chemtex Co., Ltd., trade name: SR650(30)) 1.5 parts by mass was prepared.

（包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體的製作） 對基材膜實施了電暈處理。電暈處理的條件為輸出0.3 kW、處理速度3 m/分鐘。然後，藉由棒塗法在基材膜上塗佈配向膜形成用組成物，在80℃的乾燥烘箱中加熱乾燥1分鐘。對得到的乾燥被膜實施偏光UV照射處理，形成第一配向膜。偏光UV處理是在使自UV照射裝置（SPOT CURE SP-7；牛尾（Ushio）電機股份有限公司製）照射的光透過線柵（UIS-27132##、牛尾電機股份有限公司製），波長365 nm下測定的累計光量為100 mJ/cm2 的條件下進行。第一配向膜的厚度為100 nm。(Production of a laminate including "base film/first alignment film/polarizer layer/protective layer (OC layer)") The base film was corona treated. The conditions of corona treatment are output of 0.3 kW and treatment speed of 3 m/min. Then, the alignment film forming composition was coated on the base film by a bar coating method, and heated and dried in a drying oven at 80° C. for 1 minute. The obtained dry film is subjected to a polarization UV irradiation treatment to form a first alignment film. Polarized UV treatment is to make light irradiated from a UV irradiation device (SPOT CURE SP-7; manufactured by Ushio Electric Co., Ltd.) pass through a wire grid (UIS-27132##, manufactured by Ushio Electric Co., Ltd.), with a wavelength of 365 It is performed under the condition that the cumulative light intensity measured at nm is 100 mJ/cm 2 . The thickness of the first alignment film is 100 nm.

在形成的第一配向膜上，藉由棒塗法塗佈偏振片層形成用組成物，在120℃的乾燥烘箱中加熱乾燥1分鐘後，冷卻至室溫。使用所述UV照射裝置，以累計光量1200 mJ/cm2 （365 nm基準）對乾燥被膜照射紫外線，藉此形成偏振片層。利用雷射顯微鏡（奧林巴司（Olympus）股份有限公司製OLS3000）測定得到的偏振片層的厚度，結果為1.8 μm。如此，得到包含「基材膜/第一配向膜/偏振片層」的積層體。On the formed first alignment film, the composition for forming a polarizer layer was applied by a bar coating method, heated and dried in a drying oven at 120° C. for 1 minute, and then cooled to room temperature. Using the UV irradiation device, ultraviolet rays were irradiated to the dry film at a cumulative light amount of 1200 mJ/cm 2 (365 nm reference) to form a polarizer layer. The thickness of the obtained polarizer layer was measured with a laser microscope (OLS3000 manufactured by Olympus Co., Ltd.), and it was 1.8 μm. In this way, a laminate including "base film/first alignment film/polarizer layer" was obtained.

在形成的偏振片層上，藉由棒塗法塗佈保護層（OC層）用組成物，以乾燥後的厚度為1.0 μm的方式進行塗敷，在溫度80℃下乾燥3分鐘。如此，得到包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體。On the formed polarizer layer, the composition for the protective layer (OC layer) was coated by a bar coating method, coated so that the thickness after drying was 1.0 μm, and dried at a temperature of 80° C. for 3 minutes. In this way, a laminate including "base film/first alignment film/polarizer layer/protective layer (OC layer)" was obtained.

＜包含「基材膜/第二配向膜/相位差層」的積層體＞ （基材膜） 準備聚對苯二甲酸乙二酯（PET）膜（厚度100 μm）作為基材膜。<Laminated body containing "base film/second alignment film/retardation layer"> (Base film) Prepare a polyethylene terephthalate (PET) film (thickness 100 μm) as the base film.

作為配向膜形成用組成物，使用所述＜包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體＞項中記載的配向膜形成用組成物。As the composition for forming an alignment film, the composition for forming an alignment film described in the section of the above-mentioned "Layered body including "base film/first alignment film/polarizer layer/protective layer (OC layer)"" was used.

（相位差層形成用組成物） 混合下述所示的各成分，將得到的混合物在80℃下攪拌1小時，藉此得到相位差層形成用組成物。 下式所示的化合物b-1：80質量份

Figure 02_image011
(The composition for forming a retardation layer) The components shown below are mixed, and the obtained mixture is stirred at 80° C. for 1 hour to obtain a composition for forming a retardation layer. Compound b-1 represented by the following formula: 80 parts by mass
Figure 02_image011

下式所示的化合物b-2：20質量份

Figure 02_image013
Compound b-2 represented by the following formula: 20 parts by mass
Figure 02_image013

聚合起始劑（豔佳固（Irgacure）369、2-二甲基胺基-2-苄基-1-(4-嗎啉基苯基)丁烷-1-酮、日本巴斯夫（BASF）公司製）：6質量份 調平劑（BYK-361N、聚丙烯酸酯化合物、畢克化學（BYK-Chemie）公司製）：0.1質量份 溶劑（環戊酮）：400質量份Polymerization initiator (Irgacure 369, 2-dimethylamino-2-benzyl-1-(4-morpholinylphenyl)butan-1-one, BASF Corporation of Japan System): 6 parts by mass Leveling agent (BYK-361N, polyacrylate compound, manufactured by BYK-Chemie): 0.1 parts by mass Solvent (cyclopentanone): 400 parts by mass

（包含「基材膜/第二配向膜/相位差層」的積層體的製作） 藉由棒塗法在基材膜上塗佈配向膜形成用組成物，在80℃的乾燥烘箱中加熱乾燥1分鐘。對得到的乾燥被膜實施偏光UV照射處理，形成第二配向膜。偏光UV處理使用所述UV照射裝置，在波長365 nm下測定的累計光量為100 mJ/cm2 的條件下進行。另外，以偏光UV的偏光方向相對於偏光層的吸收軸成45°的方式進行。如此，得到包含「基材膜/第二配向膜」的積層體。第二配向膜的厚度為100 nm。(Production of a laminate containing "base film/second alignment film/phase difference layer") The alignment film forming composition is applied to the base film by the bar coating method and heated and dried in a drying oven at 80°C 1 minute. The obtained dry film is subjected to polarization UV irradiation treatment to form a second alignment film. The polarized UV treatment was performed using the UV irradiation device described above, and the cumulative light amount measured at a wavelength of 365 nm was 100 mJ/cm 2 . In addition, it is performed so that the polarization direction of the polarized light UV is 45° with respect to the absorption axis of the polarizing layer. In this way, a laminate including "base film/second alignment film" is obtained. The thickness of the second alignment film is 100 nm.

在包含「基材膜/第二配向膜」的積層體的第二配向膜上，藉由棒塗法塗佈相位差層形成用組成物，在120℃的乾燥烘箱中加熱乾燥1分鐘後，冷卻至室溫。對得到的乾燥被膜，使用所述UV照射裝置，照射累計光量1000 mJ/cm2 （365 nm基準）的紫外線，藉此形成相位差層。藉由雷射顯微鏡（奧林巴司（Olympus）股份有限公司製OLS3000）測定得到的相位差層的厚度，結果為2.0 μm。相位差層是在面內方向顯示λ/4相位差值的λ/4板。如此，得到包含「基材膜/第二配向膜/相位差層」的積層體。On the second alignment film of the laminate including the "base film/second alignment film", the retardation layer forming composition was applied by bar coating, and then heated and dried in a drying oven at 120°C for 1 minute. Cool to room temperature. The obtained dry film was irradiated with ultraviolet rays with a cumulative light amount of 1000 mJ/cm 2 (based on 365 nm) using the UV irradiation device, thereby forming a retardation layer. The thickness of the obtained retardation layer was measured with a laser microscope (OLS3000 manufactured by Olympus Co., Ltd.) and found to be 2.0 μm. The retardation layer is a λ/4 plate showing a λ/4 retardation value in the in-plane direction. In this way, a laminate including "base film/second alignment film/phase difference layer" was obtained.

＜相位差膜＞ 作為相位差膜，準備作為環狀烯烴系樹脂的單軸拉伸膜的，厚度20 μm的1/4波長板（「瑞翁諾阿（Zeonor）膜」、日本瑞翁（Zeon）股份有限公司）。＜Retardation film＞ As the retardation film, a 1/4-wavelength plate with a thickness of 20 μm ("Zeonor film", Zeon Co., Ltd.) is prepared as a uniaxially stretched film of cyclic olefin resin. ).

＜黏著片＞ （黏著劑組成物A） 向具備冷卻管、氮氣導入管、溫度計及攪拌機的反應器中裝入丙酮81.8質量份、丙烯酸丁酯98.6質量份、丙烯酸0.4質量份及丙烯酸2-羥基乙酯1.0質量份的混合溶液，用氮氣置換裝置內的空氣而不含氧，同時將內溫升高至55℃。然後，全量添加將偶氮二異丁腈（聚合起始劑）0.14質量份溶解於丙酮10質量份而得到的溶液。添加聚合起始劑1小時後，以使除去單體的丙烯酸樹脂的濃度為35%的方式，在添加速度17.3質量份/hr下向反應器中連續添加丙酮，同時在內溫54℃～56℃下保溫12小時，最後添加乙酸乙酯，調節丙烯酸樹脂溶液A，以使丙烯酸樹脂的濃度達到20%。＜Adhesive sheet＞ (Adhesive composition A) A mixed solution of 81.8 parts by mass of acetone, 98.6 parts by mass of butyl acrylate, 0.4 parts by mass of acrylic acid, and 1.0 part by mass of 2-hydroxyethyl acrylate was charged into a reactor equipped with a cooling tube, a nitrogen introduction tube, a thermometer, and a stirrer. The air in the device is replaced without oxygen, and the internal temperature is raised to 55°C. Then, a solution obtained by dissolving 0.14 parts by mass of azobisisobutyronitrile (polymerization initiator) in 10 parts by mass of acetone was added in the entire amount. One hour after the addition of the polymerization initiator, acetone was continuously added to the reactor at an addition rate of 17.3 parts by mass/hr so that the concentration of the acrylic resin from which the monomer was removed was 35% while the internal temperature was 54°C to 56°C. Keep the temperature at ℃ for 12 hours, and finally add ethyl acetate to adjust the acrylic resin solution A so that the concentration of the acrylic resin reaches 20%.

將丙烯酸樹脂溶液A的不揮發分量丙烯酸樹脂：100質量份 異氰酸酯系化合物：0.4質量份 矽烷系化合物：0.5質量份混合。 以整體固體成分濃度達到10%的方式添加乙酸乙酯，得到黏著劑組成物A。 所述異氰酸酯系化合物使用甲苯二異氰酸酯的三羥甲基丙烷加成物的乙酸乙酯溶液（固體成分濃度75%）（東曹股份有限公司製、「科羅奈特（Coronate）L」）。矽烷系化合物使用3-縮水甘油氧基丙基三甲氧基矽烷（信越化學工業股份有限公司製、「KBM403」）。The non-volatile content of acrylic resin solution A acrylic resin: 100 parts by mass Isocyanate compound: 0.4 parts by mass Silane compound: 0.5 parts by mass mixed. Ethyl acetate was added so that the total solid content concentration reached 10%, and adhesive composition A was obtained. As the isocyanate compound, an ethyl acetate solution of a trimethylolpropane adduct of toluene diisocyanate (solid content 75%) (manufactured by Tosoh Co., Ltd., "Coronate L") was used. The silane-based compound used 3-glycidoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., "KBM403").

（黏著片「A40」、黏著片「A25」、黏著片「A15」） 利用塗敷器（applicator）以乾燥後的厚度為40 μm的方式將得到的黏著劑組成物A塗佈在經脫模處理的聚對苯二甲酸乙二酯膜（輕剝離膜B、厚度38 μm）的脫模處理面上，在100℃下乾燥1分鐘，得到具備黏著劑層的膜。然後，在黏著劑層上貼合進行了脫模處理的另一聚對苯二甲酸乙二酯膜（重剝離膜A、厚度38 μm）。然後，在溫度23℃、相對濕度50%RH的條件下養護7天，製作黏著片「A40」。(Adhesive sheet "A40", adhesive sheet "A25", adhesive sheet "A15") Use an applicator to apply the resulting adhesive composition A to a release-treated polyethylene terephthalate film (light release film B, thickness 38 μm) with a thickness of 40 μm after drying. μm) on the release-treated surface, dried at 100°C for 1 minute to obtain a film with an adhesive layer. Then, another polyethylene terephthalate film (heavy release film A, thickness 38 μm) that was subjected to a mold release treatment was bonded to the 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 to produce an adhesive sheet "A40".

除了以乾燥後的厚度為25 μm的方式進行塗佈以外，與「A40」同樣地製作黏著片「A25」。Except for coating so that the thickness after drying was 25 μm, an adhesive sheet "A25" was produced in the same manner as "A40".

除了以乾燥後的厚度為15 μm的方式進行塗佈以外，與「A40」同樣地製作黏著片「A15」。Except for coating so that the thickness after drying was 15 μm, an adhesive sheet "A15" was produced in the same manner as "A40".

（黏著劑組成物B） 除了將單體組成變更為丙烯酸丁酯78.6份、甲基丙烯酸甲酯20份、丙烯酸0.4份、以及丙烯酸2-羥基乙酯1.0份以外，與丙烯酸樹脂溶液A同樣地得到丙烯酸樹脂溶液B。(Adhesive composition B) Except having changed the monomer composition to 78.6 parts of butyl acrylate, 20 parts of methyl methacrylate, 0.4 part of acrylic acid, and 1.0 part of 2-hydroxyethyl acrylate, an acrylic resin solution B was obtained in the same manner as the acrylic resin solution A.

將丙烯酸樹脂溶液B的不揮發分量丙烯酸樹脂：100質量份 異氰酸酯系化合物：0.5質量份 矽烷系化合物：0.5質量份混合。 以使整體固體成分濃度達到10%的方式添加乙酸乙酯，得到黏著劑組成物B。異氰酸酯系化合物及矽烷系化合物使用了與黏著劑組成物A中使用的物質相同的物質。The non-volatile content of acrylic resin solution B acrylic resin: 100 parts by mass Isocyanate compound: 0.5 parts by mass Silane compound: 0.5 parts by mass mixed. Ethyl acetate was added so that the total solid content concentration might reach 10%, and adhesive composition B was obtained. The isocyanate-based compound and the silane-based compound were the same as those used in the adhesive composition A.

（黏著片「B40」、黏著片「B25」、黏著片「B15」） 除了使用黏著劑組成物B以外，與所述黏著片「A40」同樣地製作乾燥後的黏著劑層的厚度為40 μm、25 μm、15 μm的黏著片「B40」、黏著片「B25」、黏著片「B15」。(Adhesive sheet "B40", adhesive sheet "B25", adhesive sheet "B15") Except that the adhesive composition B was used, the adhesive sheet "B40", the adhesive sheet "B25", and the adhesive sheet "B25" with the thickness of 40 μm, 25 μm, and 15 μm after drying were produced in the same manner as the adhesive sheet "A40". Adhesive sheet "B15".

（黏著劑組成物C） 除了將單體組成變更為丙烯酸丁酯61.0份、甲基丙烯酸甲酯37份、丙烯酸1.0份、以及丙烯酸2-羥基乙酯1.0份以外，與丙烯酸樹脂溶液A同樣地得到丙烯酸樹脂溶液C。(Adhesive composition C) Except having changed the monomer composition to 61.0 parts of butyl acrylate, 37 parts of methyl methacrylate, 1.0 part of acrylic acid, and 1.0 part of 2-hydroxyethyl acrylate, an acrylic resin solution C was obtained in the same manner as the acrylic resin solution A.

將丙烯酸樹脂溶液C的不揮發分量丙烯酸樹脂：100質量份 異氰酸酯系化合物：3.0質量份 矽烷系化合物：0.5質量份混合。 以使整體固體成分濃度達到10%的方式添加乙酸乙酯，得到黏著劑組成物C。異氰酸酯系化合物及矽烷系化合物使用了與黏著劑組成物A中使用的物質相同的物質。The non-volatile content of acrylic resin solution C acrylic resin: 100 parts by mass Isocyanate compound: 3.0 parts by mass Silane compound: 0.5 parts by mass mixed. Ethyl acetate was added so that the total solid content concentration might reach 10%, and adhesive composition C was obtained. The isocyanate-based compound and the silane-based compound were the same as those used in the adhesive composition A.

（黏著片「C25」、黏著片「C15」、黏著片「C05」） 除了使用黏著劑組成物C以外，與所述黏著片「A40」同樣地製作乾燥後的黏著劑層的厚度為25 μm、15 μm、5 μm的黏著片「C25」、黏著片「C15」、黏著片「C05」。(Adhesive sheet "C25", adhesive sheet "C15", adhesive sheet "C05") Except that the adhesive composition C is used, the adhesive sheet "C25", the adhesive sheet "C15", and the adhesive sheet "C15" with the thickness of 25 μm, 15 μm, and 5 μm after drying are produced in the same manner as the adhesive sheet "A40". Adhesive sheet "C05".

對於製作的黏著劑層，按照下述測定儲存彈性係數及層的厚度，求出評價參數A（儲存彈性係數/層的厚度）。評價參數A是A1及A2的總稱。結果如表1所示。For the produced adhesive layer, the storage elastic coefficient and the thickness of the layer were measured as follows to obtain the evaluation parameter A (storage elastic coefficient/layer thickness). Evaluation parameter A is a general term for A1 and A2. The results are shown in Table 1.

[表1] 黏著劑組成物 儲存彈性係數 （kPa） 層的厚度 （μm） 評價參數A （kPa/μm） 名稱 A 60 40 1.5 A40 60 25 2.4 A25 60 15 4.0 A15 B 290 40 7.3 B40 290 25 11.6 B25 290 15 19.3 B15 C 870 25 34.8 C25 870 15 58.0 C15 870 5 174 C05 [Table 1] Adhesive composition Storage elasticity coefficient (kPa) Layer thickness (μm) Evaluation parameter A (kPa/μm) name A 60 40 1.5 A40 60 25 2.4 A25 60 15 4.0 A15 B 290 40 7.3 B40 290 25 11.6 B25 290 15 19.3 B15 C 870 25 34.8 C25 870 15 58.0 C15 870 5 174 C05

[層的厚度] 黏著劑層的厚度使用接觸式膜厚測定裝置（尼康（Nikon）股份有限公司製「MS-5C」）測定。其中，針對偏振片層以及配向膜，使用雷射顯微鏡（奧林巴司（Olympus）股份有限公司製「OLS3000」）進行測定。[Layer thickness] The thickness of the adhesive layer is measured using a contact-type film thickness measuring device ("MS-5C" manufactured by Nikon Co., Ltd.). Among them, the polarizer layer and the alignment film were measured using a laser microscope (“OLS3000” manufactured by Olympus Co., Ltd.).

[儲存彈性係數測定方法] 黏著劑層在溫度25℃下的儲存彈性係數使用黏彈性測定裝置（MCR-301，安敦帕爾（Anton Paar）公司）進行測定。將厚度25 μm的各黏著片裁斷為寬30 mm×長30 mm。剝離剝離膜，以厚度為150 μm的方式積層多張並接合於玻璃板後，在與測定晶片接著的狀態下，在-20℃至100℃的溫度區域，在頻率1.0 Hz、變形量1%、升溫速度5 ℃/分鐘的條件下進行測定，確認溫度25℃下的儲存彈性係數。[Measurement method of storage elasticity coefficient] The storage elastic coefficient of the adhesive layer at a temperature of 25°C was measured using a viscoelasticity measuring device (MCR-301, Anton Paar). Cut each adhesive sheet with a thickness of 25 μm into a width of 30 mm × a length of 30 mm. After peeling off the release film, layering multiple sheets with a thickness of 150 μm and bonding them to the glass plate, in the state of being bonded to the measuring wafer, in the temperature range of -20°C to 100°C, at a frequency of 1.0 Hz and a deformation amount of 1% , Measure under the condition of a heating rate of 5°C/min to confirm the storage elasticity coefficient at a temperature of 25°C.

＜前表面板＞ 就作為前表面板的窗口膜而言，準備了單面具有硬塗層的聚醯亞胺膜（HC-PI膜，整體厚度：70 μm，拉伸彈性係數5.6 GPa）。＜Front surface plate＞ As for the window film of the front surface plate, a polyimide film (HC-PI film, overall thickness: 70 μm, tensile elastic coefficient 5.6 GPa) with a hard coat on one side was prepared.

＜背面板＞ 作為背面板，準備聚對苯二甲酸乙二酯（PET）基板（厚度38 μm、拉伸彈性係數4.5 GPa）。＜Back panel＞ As the back plate, a polyethylene terephthalate (PET) substrate (thickness 38 μm, tensile elastic coefficient 4.5 GPa) was prepared.

[拉伸彈性係數測定方法] 前表面板及背面板的拉伸彈性係數如下般進行測定。使用超級切割器自前表面板或背面板切出長邊110 mm×短邊10 mm的長方形的小片。接著，用拉伸試驗機（島津製作所股份有限公司製、奧托古拉夫（autograph）AG-Xplus試驗機）的上下夾具以夾具的間隔為5 cm的方式夾住所述測定用樣品的長邊方向兩端，在23℃、相對濕度55%的環境下，以拉伸速度4 mm/分鐘沿測定用樣品的長度方向拉伸測定用樣品，自得到的應力-應變曲線中的20 MPa～40 MPa之間的直線的斜率，算出在23℃、相對濕度55%下的拉伸彈性模數。此時，用於計算應力的厚度藉由所述記載的方法測定。[Measurement method of tensile elasticity coefficient] The tensile elastic modulus of the front panel and the back panel was measured as follows. Use a super cutter to cut out a rectangular piece of 110 mm long side × 10 mm short side from the front panel or back panel. Next, the upper and lower clamps of a tensile testing machine (manufactured by Shimadzu Corporation, autograph AG-Xplus testing machine) were used to clamp the long sides of the measurement sample at a distance of 5 cm. At both ends of the direction, the measurement sample is stretched along the length direction of the measurement sample at a tensile speed of 4 mm/min under an environment of 23°C and a relative humidity of 55%. The obtained stress-strain curve is 20 MPa～40 The slope of the straight line between MPa is calculated as the tensile modulus of elasticity at 23°C and relative humidity of 55%. At this time, the thickness used to calculate the stress is measured by the method described above.

＜實施例1-1的積層體的製造＞ 自黏著片「C25」剝離輕剝離膜B，貼合在包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體的保護層（OC層）側，得到積層體A1。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。<Production of the laminate of Example 1-1> The light release film B was peeled off from the adhesive sheet "C25" and bonded to the protective layer (OC layer) side of the laminate containing the "base film/first alignment film/polarizer layer/protective layer (OC layer)" to obtain Laminated body A1. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自積層體A1剝離重剝離膜A，貼合在作為相位差層的的相位差膜，得到積層體A2。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The heavy release film A was peeled off from the laminate A1 and bonded to the retardation film as the retardation layer to obtain a laminate A2. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自黏著片「C15」剝離輕剝離膜B，貼合在積層體A2的相位差層側，得到積層體A3。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The light release film B was peeled off from the adhesive sheet "C15" and bonded to the retardation layer side of the laminate A2 to obtain a laminate A3. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自黏著片「A25」剝離輕剝離膜B，貼合於前表面板的不具有硬塗層的一側，得到積層體A4。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The light release film B was peeled off from the adhesive sheet "A25", and it was bonded to the side of the front panel that does not have a hard coat layer to obtain a laminate A4. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自積層體A4剝離重剝離膜A，貼合到積層體A3的基材膜側，得到積層體A5。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The heavy release film A was peeled off from the laminate A4 and bonded to the base film side of the laminate A3 to obtain a laminate A5. Preliminary double-sided corona treatment on the bonding surface (output 0.3 kW, speed 3 m/min).

自積層體A5剝離重剝離膜A，貼合於背面板，得到圖2所示的實施例1-1的積層體。圖2中，前面板為第一保護層10，前面板下的黏著劑層為第一黏著劑層11，基材膜為基材層15，自第一配向膜至保護層（OC層）為夾設塗層12，保護層（OC層）下的黏著劑層為第二黏著劑層13，自相位差層至背面板為第二保護層14。The heavy release film A was peeled off from the laminate A5 and bonded to the back plate to obtain the laminate of Example 1-1 shown in FIG. 2. In FIG. 2, the front panel is the first protective layer 10, the adhesive layer under the front panel is the first adhesive layer 11, the base film is the base layer 15, and the first alignment film to the protective layer (OC layer) is The coating layer 12 is sandwiched, the adhesive layer under the protective layer (OC layer) is the second adhesive layer 13, and the second protective layer 14 is from the retardation layer to the back plate.

＜實施例1-2的積層體的製造＞ 除了使用「C05」代替黏著片「C15」以外，與實施例1-1同樣地得到實施例1-2的積層體。<Production of laminated body of Example 1-2> Except having used "C05" instead of the adhesive sheet "C15", the laminate of Example 1-2 was obtained in the same manner as Example 1-1.

＜比較例1-1的積層體的製造＞ 除了使用「C05」代替黏著片「A25」、使用「C15」代替「C25」、使用「C05」代替「C15」以外，與實施例1-1同樣地得到比較例1-1的積層體。<Production of laminate of Comparative Example 1-1> A laminate of Comparative Example 1-1 was obtained in the same manner as in Example 1-1 except that "C05" was used instead of the adhesive sheet "A25", "C15" was used instead of "C25", and "C05" was used instead of "C15".

＜比較例1-2的積層體的製造＞ 除了使用「C15」代替黏著片「A25」、使用「C05」代替「C25」以外，與實施例1-1同樣地得到比較例1-2的積層體。 ＜比較例1-3的積層體的製造＞ 除了使用「B25」代替黏著片「A25」、使用「B15」代替「C25」、使用使用「B25」代替「C15」以外，與實施例1-1同樣地得到比較例1-3的積層體。<Production of laminate of Comparative Example 1-2> Except for using "C15" instead of the adhesive sheet "A25" and using "C05" instead of "C25", the laminate of Comparative Example 1-2 was obtained in the same manner as in Example 1-1. <Production of laminated body of Comparative Example 1-3> A laminate of Comparative Example 1-3 was obtained in the same manner as in Example 1-1 except that "B25" was used instead of the adhesive sheet "A25", "B15" was used instead of "C25", and "B25" was used instead of "C15".

將實施例1-1、1-2、比較例1-1、1-2、1-3的積層體中使用的黏著劑層匯總於表2。「A1+A2」、「A2-A1」、「A2」的值如表2記載般。對積層體進行彎曲性試驗的結果如表2所示。Table 2 summarizes the adhesive layers used in the laminates of Examples 1-1, 1-2 and Comparative Examples 1-1, 1-2, and 1-3. The values of "A1+A2", "A2-A1", and "A2" are as described in Table 2. The results of the bendability test on the laminate are shown in Table 2.

[彎曲性試驗] 對於積層體，使用彎曲評價設備（科學小鎮（Science Town）公司製，STS-VRT-500）進行了確認彎曲性的評價試驗。圖4的（a）及（b）是示意性示出本評價試驗的方法的圖。如圖4的（a）及（b）所示，將能夠分別移動的兩個載置台501、502以間隙C為2 mm（彎曲半徑1 mm）的方式配置，以使寬度方向的中心位於間隙C的中心並且第一保護層位於上側的方式固定配置積層體（圖4的（a））。然後，使兩個載置台501、502以位置P1以及位置P2為旋轉軸的中心向上方旋轉90度，對與載置台的間隙C對應的積層體的區域施加彎曲力（圖4的（b））。然後，使兩個載置台501、502返回原來的位置（圖4的（a））。完成以上一系列操作，將彎曲力的附加次數計為1次。在溫度25℃下反覆進行該處理後，確認在積層體的與載置台501、載置台502的間隙C對應的區域的塗層中有無產生裂紋。載置台501、載置台502的移動速度、彎曲力的附加步幅在對任一積層體的評價試驗中均為相同的條件。 A：彎曲力的附加次數達到30萬亦沒有產生裂紋。 B：彎曲力的附加次數為20萬以上且不足30萬時產生了裂紋。 C：彎曲力的附加次數為10萬以上且不足20萬時產生了裂紋。 D：彎曲力的附加次數不足10萬時產生了裂紋。[Bending test] For the laminate, an evaluation test to confirm the bendability was performed using a bending evaluation device (manufactured by Science Town, STS-VRT-500). Fig. 4 (a) and (b) are diagrams schematically showing the method of this evaluation test. As shown in (a) and (b) of Figure 4, the two mounting tables 501 and 502 that can be moved separately are arranged so that the gap C is 2 mm (bending radius of 1 mm) so that the center in the width direction is located in the gap The laminated body is fixedly arranged such that the center of C and the first protective layer is located on the upper side (FIG. 4( a )). Then, the two mounting tables 501 and 502 are rotated upwards by 90 degrees with the positions P1 and P2 as the center of the rotation axis, and bending force is applied to the region of the laminate corresponding to the gap C of the mounting table (Figure 4(b)) ). Then, the two mounting tables 501 and 502 are returned to their original positions (FIG. 4(a)). After completing the above series of operations, count the number of additional bending forces as one. After performing this treatment repeatedly at a temperature of 25° C., it was confirmed whether or not cracks were generated in the coating layer of the layered body corresponding to the gap C between the mounting table 501 and the mounting table 502. The moving speed of the mounting table 501 and the mounting table 502, and the additional step width of the bending force are the same conditions in the evaluation test of any laminate. A: The number of additional bending forces reached 300,000 without cracks. B: Cracks occurred when the number of additional bending forces was 200,000 or more and less than 300,000. C: Cracks occurred when the number of additional bending forces was 100,000 or more and less than 200,000. D: Cracks occurred when the number of additional bending forces was less than 100,000.

[表2]   實施例1-1 實施例1-2 比較例1-1 比較例1-2 比較例1-3 種類 評價參數A 種類 評價參數A 種類 評價參數A 種類 評價參數A 種類 評價參數A 前表面板下的 黏著劑層 A25 2.4 A25 2.4 C05 174 C15 58.0 B25 11.6 保護層（OC層）下的黏著劑層 C25 34.8 C25 34.8 C15 58.0 C05 174 B15 19.3 相位差層下的 黏著劑層 C15 58.0 C05 174 C05 174 C15 58.0 B25 11.6 A1+A2 A 37.2 A 37.2 C 232 C 232 A 30.9 A2-A1 B 32.4 B 32.4 D -116 A 116 B 7.7 A2 B 34.8 B 34.8 B 58.0 A 174 C 19.3 彎曲性 A A D C C 表中，由粗線包圍的區域中，上段為第一黏著劑層的評價參數A1，下段為第二黏著劑層的評價參數A2。 [Table 2] Example 1-1 Example 1-2 Comparative example 1-1 Comparative example 1-2 Comparative example 1-3 species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A Adhesive layer under the front surface plate A25 2.4 A25 2.4 C05 174 C15 58.0 B25 11.6 Adhesive layer under protective layer (OC layer) C25 34.8 C25 34.8 C15 58.0 C05 174 B15 19.3 Adhesive layer under retardation layer C15 58.0 C05 174 C05 174 C15 58.0 B25 11.6 A1+A2 A 37.2 A 37.2 C 232 C 232 A 30.9 A2-A1 B 32.4 B 32.4 D -116 A 116 B 7.7 A2 B 34.8 B 34.8 B 58.0 A 174 C 19.3 Flexibility A A D C C In the table, in the area surrounded by the thick line, the upper section is the evaluation parameter A1 of the first adhesive layer, and the lower section is the evaluation parameter A2 of the second adhesive layer.

表2中，對於「A1+A2」，將「A1+A2≦130」設為「A」，將「130>A1+A2≦230」設為「B」，將「230>A1+A2≦260」設為「C」，將「260>A1+A2」設為「D」。對於「A2-A1」，將「100≦A2-A1」設為「A」，將「0≦A2-A1>100」設為「B」，將「-100≦A2-A1>0」設為「C」，將「A2-A1>-100」設為「D」。關於「A2」，將「60≦A2」設為「A」，將「34≦A2>60」設為「B」，將「10≦A2>34」設為「C」，將「A2>10」設為「D」。對於以下的表亦是同樣的。In Table 2, for "A1+A2", set "A1+A2≦130" to "A", set "130>A1+A2≦230" to "B", set "230>A1+A2≦260 "Is set to "C", and "260>A1+A2" is set to "D". For "A2-A1", set "100≦A2-A1" to "A", set "0≦A2-A1>100" to "B", and set "-100≦A2-A1>0" to "C", set "A2-A1>-100" to "D". Regarding "A2", set "60≦A2" to "A", set "34≦A2>60" to "B", set "10≦A2>34" to "C", set "A2>10 "Is set to "D". The same is true for the following table.

實施例1-1及實施例1-2的積層體中，「A1+A2」為230以下，「A2-A1」為0以上，「A2」為34以上。在該些積層體中，塗層裂紋的產生得到了抑制。另一方面，儘管使用了相同的塗層及基材層，但在「A1+A2」大於230、「A2-A1」小於0的比較例1-1的積層體、「A1+A2」大於230的比較例1-2的積層體、「A2」小於34的比較例1-3的積層體中，裂紋的產生沒有得到抑制。In the laminates of Example 1-1 and Example 1-2, "A1+A2" is 230 or less, "A2-A1" is 0 or more, and "A2" is 34 or more. In these laminates, the generation of coating cracks is suppressed. On the other hand, despite using the same coating and base layer, the laminate of Comparative Example 1-1 where "A1+A2" is greater than 230 and "A2-A1" is less than 0, "A1+A2" is greater than 230 In the laminate of Comparative Example 1-2 and the laminate of Comparative Example 1-3 with "A2" less than 34, the occurrence of cracks was not suppressed.

＜實施例2-1的積層體的製造＞ 自黏著片「C25」剝離輕剝離膜B，貼合在包含「基材膜/第一配向膜/偏振片層/保護層（OC層）」的積層體的保護層（OC層）側，得到積層體B1。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。<Production of laminate of Example 2-1> The light release film B was peeled off from the adhesive sheet "C25" and bonded to the protective layer (OC layer) side of the laminate containing the "base film/first alignment film/polarizer layer/protective layer (OC layer)" to obtain Laminated body B1. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自積層體B1剝離重剝離膜A，貼合在包含「基材膜/第二配向膜/相位差層」的積層體的相位差層側，得到積層體B2。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The heavy release film A was peeled off from the laminate B1, and was bonded to the retardation layer side of the laminate including the "base film/second alignment film/retardation layer" to obtain a laminate B2. Preliminary double-sided corona treatment on the bonding surface (output 0.3 kW, speed 3 m/min).

自黏著片「C15」剝離輕剝離膜B，貼合在自積層體B2剝離了相位差層的形成中使用的基材膜和第二配向膜的面上，得到積層體B3。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The light release film B was peeled off from the adhesive sheet "C15", and the base film and the second alignment film used for the formation of the retardation layer were peeled off from the laminate B2 to obtain a laminate B3. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自黏著片「A25」剝離輕剝離膜B，貼合於前表面板的不具有硬塗層的一側，得到積層體B4。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The light release film B was peeled off from the adhesive sheet "A25", and it was bonded to the side of the front surface plate that does not have a hard coat layer to obtain a laminate B4. Preliminary double-sided corona treatment (output 0.3 kW, speed 3 m/min) on the bonding surface.

自積層體B4剝離重剝離膜A，貼合到積層體B3的基材膜側，得到積層體B5。對貼合面預先進行了雙面電暈處理（輸出0.3 kW、速度3 m/分鐘）。The heavy release film A was peeled off from the laminate B4 and bonded to the base film side of the laminate B3 to obtain a laminate B5. Preliminary double-sided corona treatment on the bonding surface (output 0.3 kW, speed 3 m/min).

自積層體B5剝離重剝離膜A，貼合於背面板，得到圖3所示的實施例2-1的積層體。圖3中，前表面板為第一保護層10，前表面板下的黏著劑層為第一黏著劑層11，基材膜為基材層15，自第一配向膜至保護層（OC層）為夾設塗層12，保護層（OC層）下的黏著劑層為第二黏著劑層13，自相位差層至背面板為第二保護層14。The heavy release film A was peeled off from the laminate B5 and bonded to the back plate to obtain the laminate of Example 2-1 shown in FIG. 3. In FIG. 3, the front surface plate is the first protective layer 10, the adhesive layer under the front surface plate is the first adhesive layer 11, and the base film is the base layer 15, from the first alignment film to the protective layer (OC layer ) Is to sandwich the coating 12, the adhesive layer under the protective layer (OC layer) is the second adhesive layer 13, and from the retardation layer to the back plate is the second protective layer 14.

＜實施例2-2的積層體的製造＞ 除了使用「C05」代替黏著片「C15」以外，與實施例2-1同樣地得到實施例2-2的積層體。<Production of the laminate of Example 2-2> Except having used "C05" instead of the adhesive sheet "C15", the laminate of Example 2-2 was obtained in the same manner as in Example 2-1.

＜比較例2-1的積層體的製造＞ 除了使用「C05」代替黏著片「A25」、使用「C15」代替「C25」、使用「C05」代替「C15」以外，與實施例2-1同樣地得到比較例2-1的積層體。<Production of laminated body of Comparative Example 2-1> Except for using "C05" instead of the adhesive sheet "A25", "C15" instead of "C25", and "C05" instead of "C15", a laminate of Comparative Example 2-1 was obtained in the same manner as in Example 2-1.

＜比較例2-2的積層體的製造＞ 除了使用「C15」代替黏著片「A25」、使用「C05」代替「C25」以外，與實施例2-1同樣地得到比較例2-2的積層體。 ＜比較例2-3的積層體的製造＞ 除了使用「B25」代替黏著片「A25」、使用「B15」代替「C25」、使用使用「B25」代替「C15」以外，與實施例2-1同樣地得到比較例2-3的積層體。<Production of laminated body of Comparative Example 2-2> Except for using "C15" instead of the adhesive sheet "A25" and using "C05" instead of "C25", a laminate of Comparative Example 2-2 was obtained in the same manner as in Example 2-1. <Production of laminate of Comparative Example 2-3> Except for using "B25" instead of the adhesive sheet "A25", using "B15" instead of "C25", and using "B25" instead of "C15", a laminate of Comparative Example 2-3 was obtained in the same manner as in Example 2-1.

將實施例2-1、2-2、比較例2-1、2-2、2-3的積層體中使用的黏著劑層匯總於表3。「A1+A2」、「A2-A1」、「A2」的值如表3記載般。將對積層體進行彎曲性試驗的結果示於表3。Table 3 summarizes the adhesive layers used in the laminates of Examples 2-1, 2-2, Comparative Examples 2-1, 2-2, and 2-3. The values of "A1+A2", "A2-A1", and "A2" are as described in Table 3. Table 3 shows the results of the bending test on the laminate.

[表3]   實施例2-1 實施例2-2 比較例2-1 比較例2-2 比較例2-3 種類 評價參數A 種類 評價參數A 種類 評價參數A 種類 評價參數A 種類 評價參數A 前表面板下的 黏著劑層 A25 2.4 A25 2.4 C05 174 C15 58.0 B25 11.6 保護層（OC層） 下的黏著劑層 C25 34.8 C25 34.8 C15 58.0 C05 174 B15 19.3 相位差層下 的黏著劑層 C15 58.0 C05 174 C05 174 C15 58.0 B25 11.6 A1+A2 A 37.2 A 37.2 C 232 C 232 A 30.9 A2-A1 B 32.4 B 32.4 D -116 A 116 B 7.7 A2 B 34.8 B 34.8 B 58.0 A 174 C 19.3 彎曲性 A A D C C 表中，由粗線包圍的區域中，上段為第一黏著劑層的評價參數A1，下段為第二黏著劑層的評價參數A2。 [table 3] Example 2-1 Example 2-2 Comparative example 2-1 Comparative example 2-2 Comparative example 2-3 species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A species Evaluation parameter A Adhesive layer under the front surface plate A25 2.4 A25 2.4 C05 174 C15 58.0 B25 11.6 Adhesive layer under protective layer (OC layer) C25 34.8 C25 34.8 C15 58.0 C05 174 B15 19.3 Adhesive layer under retardation layer C15 58.0 C05 174 C05 174 C15 58.0 B25 11.6 A1+A2 A 37.2 A 37.2 C 232 C 232 A 30.9 A2-A1 B 32.4 B 32.4 D -116 A 116 B 7.7 A2 B 34.8 B 34.8 B 58.0 A 174 C 19.3 Flexibility A A D C C In the table, in the area surrounded by the thick line, the upper section is the evaluation parameter A1 of the first adhesive layer, and the lower section is the evaluation parameter A2 of the second adhesive layer.

實施例2-1及實施例2-2的積層體中，「A1+A2」為230以下，「A2-A1」為0以上，「A2」為34以上。在該些積層體中，抑制了在塗層中產生裂紋。另一方面，儘管使用了相同的塗層及基材層，但在「A1+A2」大於230、「A2-A1」小於0的比較例2-1的積層體、「A1+A2」大於230的比較例2-2的積層體、及「A2」小於34的比較例2-3的積層體中，裂紋的產生沒有得到抑制。In the laminates of Example 2-1 and Example 2-2, "A1+A2" is 230 or less, "A2-A1" is 0 or more, and "A2" is 34 or more. In these laminates, the generation of cracks in the coating is suppressed. On the other hand, despite using the same coating and base layer, the laminate of Comparative Example 2-1 where "A1+A2" is greater than 230 and "A2-A1" is less than 0, "A1+A2" is greater than 230 In the laminate of Comparative Example 2-2 and the laminate of Comparative Example 2-3 in which "A2" is less than 34, the occurrence of cracks is not suppressed.

100:積層體 10:第一保護層 11:第一黏著劑層 12:夾設塗層 13:第二黏著劑層 14:第二保護層 15:基材層 501、502:載置台 1:前表面板 2:黏著劑層 3:基材膜 4:偏振片層 5:相位差層 6:背面板 7:第一配向膜 8:保護層（OC層） P1、P2:位置 C:間隙100: layered body 10: The first protective layer 11: The first adhesive layer 12: Clamping coating 13: The second adhesive layer 14: The second protective layer 15: Substrate layer 501, 502: Mounting table 1: Front panel 2: Adhesive layer 3: Base film 4: Polarizer layer 5: retardation layer 6: Back panel 7: The first alignment film 8: Protective layer (OC layer) P1, P2: position C: gap

圖1是表示本發明的積層體的一例的概略剖面圖。 圖2是表示實施例1-1的積層體的概略剖面圖。 圖3是表示實施例2-1的積層體的概略剖面圖。 圖4的（a）及（b）是說明彎曲性試驗的方法的概略圖。Fig. 1 is a schematic cross-sectional view showing an example of the laminate of the present invention. Fig. 2 is a schematic cross-sectional view showing a laminate of Example 1-1. Fig. 3 is a schematic cross-sectional view showing a laminate of Example 2-1. (A) and (b) of FIG. 4 are schematic diagrams explaining the method of a bendability test.

100:積層體 100: layered body

10:第一保護層 10: The first protective layer

11:第一黏著劑層 11: The first adhesive layer

12:夾設塗層 12: Clamping coating

13:第二黏著劑層 13: The second adhesive layer

14:第二保護層 14: The second protective layer

15:基材層 15: Substrate layer

Claims (7)

一種積層體，依次包括：第一保護層、第一黏著劑層、基材層、夾設塗層、第二黏著劑層、及第二保護層，其中， 各層相互接觸， 當將所述第一黏著劑層在溫度25℃下的儲存彈性係數設為G'1〔kpa〕、將所述第二黏著劑層在溫度25℃下的儲存彈性係數設為G'2〔kpa〕、將所述第一黏著劑層的厚度設為a1〔μm〕、將所述第二黏著劑層的厚度設為a2〔μm〕時，由下述式（1）及式（2）： A1=G'1/a1    （1） A2=G'2/a2    （2） 所表示的評價參數A1及A2滿足下式（3）、式（4）及式（5）： A1+A2≦230  （3） A2-A1≧0    （4） A2≧34      （5）。A laminated body, in turn, includes: a first protective layer, a first adhesive layer, a substrate layer, an interposed coating, a second adhesive layer, and a second protective layer, wherein, The layers touch each other, When the storage elastic coefficient of the first adhesive layer at a temperature of 25°C is set to G'1 [kpa], and the storage elastic coefficient of the second adhesive layer at a temperature of 25°C is set to G'2[ kpa], when the thickness of the first adhesive layer is set to a1[μm] and the thickness of the second adhesive layer is set to a2[μm], the following formulas (1) and (2) : A1=G'1/a1 (1) A2=G'2/a2 (2) The indicated evaluation parameters A1 and A2 satisfy the following formula (3), formula (4) and formula (5): A1+A2≦230 (3) A2-A1≧0 (4) A2≧34 (5). 如請求項1所述的積層體，其中，所述第一保護層包含拉伸彈性係數為4.0 GPa以上的窗口膜。The laminate according to claim 1, wherein the first protective layer includes a window film having a tensile elastic modulus of 4.0 GPa or more. 如請求項1或請求項2所述的積層體，其中，所述第二保護層包括拉伸彈性係數為4.0 GPa以上的背面板。The laminate according to claim 1 or claim 2, wherein the second protective layer includes a back sheet having a tensile elasticity coefficient of 4.0 GPa or more. 如請求項1至請求項3中任一項所述的積層體，其中，所述夾設塗層包含一層以上，各層的厚度為5 μm以下。The laminate according to any one of claims 1 to 3, wherein the intervening coating layer includes one or more layers, and the thickness of each layer is 5 μm or less. 如請求項1至請求項4中任一項所述的積層體，其中，所述夾設塗層包括偏振片層、相位差層或觸控感測器面板。The laminate according to any one of claim 1 to claim 4, wherein the interposed coating layer includes a polarizer layer, a phase difference layer, or a touch sensor panel. 如請求項1至請求項5中任一項所述的積層體，其中，所述G'1及所述G'2分別為10000 kPa以下。The laminate according to any one of claims 1 to 5, wherein the G'1 and the G'2 are each 10000 kPa or less. 一種顯示裝置，包括如請求項1至請求項6中任一項所述的積層體。A display device includes the laminated body according to any one of claim 1 to 6.
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