TW202307485A - Laminate - Google Patents

Laminate Download PDF

Info

Publication number
TW202307485A
TW202307485A TW111113058A TW111113058A TW202307485A TW 202307485 A TW202307485 A TW 202307485A TW 111113058 A TW111113058 A TW 111113058A TW 111113058 A TW111113058 A TW 111113058A TW 202307485 A TW202307485 A TW 202307485A
Authority
TW
Taiwan
Prior art keywords
bonding layer
polarizer
layer
laminate
film
Prior art date
Application number
TW111113058A
Other languages
Chinese (zh)
Inventor
竹内智康
趙天熙
崔允碩
金孝東
Original Assignee
日商住友化學股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2022042656A external-priority patent/JP2022161832A/en
Application filed by 日商住友化學股份有限公司 filed Critical 日商住友化學股份有限公司
Publication of TW202307485A publication Critical patent/TW202307485A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10458—Polarization selective transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/72—Cured, e.g. vulcanised, cross-linked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/516—Oriented mono-axially
    • 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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
    • B32B2310/0837—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using actinic light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • 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
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B32B2329/04—Polyvinylalcohol
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonlinear Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polarising Elements (AREA)

Abstract

An object of the present invention is to provide a laminate, an image display device including the laminate, and a method for manufacturing the laminate; the laminate has a glass plate, a first bonding layer, a polarizer, a second bonding layer, and a thermoplastic resin film in this order, and the amount of change in the degree of polarization is small even after a heat resistance test.
As a solution, the laminate has a glass plate, a first bonding layer, and a polarizer laminated in this order, wherein both of the glass plate and the polarizer are laminated in direct contact with the first bonding layer, the thickness of the glass plate is 100 μm or less, the thickness of the first bonding layer is 10 μm or less, the first bonding layer contains a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition, a second bonding layer and a thermoplastic resin film are laminated in this order on the side opposite to the first bonding layer of the polarizing element.

Description

積層體 laminate

本發明係關於積層體，更且亦關於其製造方法。 The present invention relates to laminates, and moreover to methods for their manufacture.

偏光板係用來作為構成液晶顯示裝置等圖像顯示裝置的光學構件。專利文獻1中提案包含偏光片、接著層及玻璃膜的偏光板。構成該偏光板之玻璃膜在圖像顯示裝置之顯示面中構成視認側表面。 A polarizing plate is used as an optical member constituting an image display device such as a liquid crystal display device. Patent Document 1 proposes a polarizing plate including a polarizer, an adhesive layer, and a glass film. The glass film constituting the polarizing plate constitutes the viewing side surface of the display surface of the image display device.

[先前技術文獻] [Prior Art Literature]

[專利文獻] [Patent Document]

[專利文獻1]國際公開第2013/175767號 [Patent Document 1] International Publication No. 2013/175767

包含偏光片、接著層及玻璃膜的偏光板，在進行耐熱試驗時，有著偏光度大幅變化之情況。 A polarizing plate including a polarizer, an adhesive layer, and a glass film may have a large change in the degree of polarization when subjected to a heat resistance test.

本發明提供一種積層體、包含該積層體之圖像顯示裝置、及積層體的製造方法，該積層體係依序具有玻璃板、第1貼合層及偏光片，且在耐熱試驗後，偏光度之變化量小。 The present invention provides a laminated body, an image display device comprising the laminated body, and a method for manufacturing the laminated body. The laminated system has a glass plate, a first bonding layer, and a polarizer in sequence, and after a heat resistance test, the polarization degree The amount of change is small.

本發明提供以下之積層體、圖像顯示裝置及積層體的製造方法。 The present invention provides the following laminate, image display device, and method for manufacturing the laminate.

[1]一種積層體，係依序積層有玻璃板、第1貼合層及偏光片，其中， [1] A laminate comprising a glass plate, a first bonding layer and a polarizer laminated sequentially, wherein,

前述玻璃板之厚度係100μm以下， The thickness of the aforementioned glass plate is 100 μm or less,

前述第1貼合層之厚度係10μm以下， The thickness of the aforementioned first bonding layer is 10 μm or less,

前述第1貼合層包含活性能量線硬化性組成物之硬化物或感壓接著劑組成物。 The first bonding layer includes a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition.

[2]如[1]所述之積層體，其中，在前述偏光片之與前述第1貼合層為相反側，依序積層有第2貼合層、熱塑性樹脂膜。 [2] The laminate according to [1], wherein a second bonding layer and a thermoplastic resin film are laminated in this order on the side of the polarizer opposite to the first bonding layer.

[3]如[2]所述之積層體，其中，前述第2貼合層包含水系接著劑組成物之硬化物。 [3] The laminate according to [2], wherein the second bonding layer includes a cured product of a water-based adhesive composition.

[4]一種圖像顯示裝置，係包含[1]至[3]中任一項所述之積層體。 [4] An image display device comprising the laminate described in any one of [1] to [3].

[5]一種積層體之製造方法，係製造[3]所述之積層體，該製造方法係包含： [5] A method for manufacturing a laminate, which is to manufacture the laminate described in [3], the manufacturing method comprising:

在偏光片或熱塑性樹脂膜之至少任一者的貼合面塗佈水系接著劑組成物之步驟； A step of coating a water-based adhesive composition on at least one of the bonding surface of the polarizer or the thermoplastic resin film;

使前述偏光片及前述熱塑性樹脂膜經介前述水系接著劑組成物而貼合之步驟； a step of laminating the aforementioned polarizer and the aforementioned thermoplastic resin film through the aforementioned water-based adhesive composition;

藉由加熱使前述水系接著劑組成物硬化而形成包含前述水系接著劑組成物之硬化物的第2貼合層之步驟；以及 A step of forming a second bonding layer comprising a cured product of the water-based adhesive composition by heating the water-based adhesive composition to harden; and

在前述偏光片之與前述第2貼合層為相反側經介第1貼合層而貼合玻璃板之步驟。 A step of laminating a glass plate on the opposite side of the polarizer to the second laminating layer through the first laminating layer.

[6]一種積層體，係依序積層有玻璃板、第1貼合層及偏光片，其中， [6] A laminate comprising a glass plate, a first bonding layer and a polarizer laminated sequentially, wherein,

前述玻璃板及前述偏光片均以與前述第1貼合層直接地接觸之方式積層， Both the aforementioned glass plate and the aforementioned polarizer are laminated in such a manner that they are in direct contact with the aforementioned first bonding layer,

前述玻璃板之厚度係100μm以下， The thickness of the aforementioned glass plate is 100 μm or less,

前述第1貼合層之厚度係10μm以下， The thickness of the aforementioned first bonding layer is 10 μm or less,

前述第1貼合層包含活性能量線硬化性組成物之硬化物或感壓接著劑組成物， The first bonding layer includes a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition,

在前述偏光片之與前述第1貼合層為相反側依序積層有第2貼合層及熱塑性樹脂膜。 A second bonding layer and a thermoplastic resin film are sequentially laminated on the side of the polarizer opposite to the first bonding layer.

藉由本發明，可提供積層體、包含該積層體之圖像顯示裝置、及積層體的製造方法，該積層體係依序具有玻璃板、第1貼合層及偏光片，且在耐熱試驗後偏光度之降低受到抑制。 According to the present invention, a laminate, an image display device including the laminate, and a method for manufacturing the laminate can be provided. The laminate system has a glass plate, a first bonding layer, and a polarizer in this order, and polarized light after a heat resistance test The decrease in speed is suppressed.

1:玻璃板 1: glass plate

2:第1貼合層 2: The first bonding layer

3:偏光片 3: Polarizer

4:第2貼合層 4: The second bonding layer

5:熱塑性樹脂膜 5: Thermoplastic resin film

6:表面保護膜(防護膜) 6: Surface protection film (protective film)

7:黏著層 7: Adhesive layer

8:圖像顯示元件 8: Image display components

10,20,30:積層體 10,20,30: laminated body

40:圖像顯示裝置 40: Image display device

圖1係顯示本發明之一態樣之積層體的概略平面圖。 Fig. 1 is a schematic plan view showing a laminate of an aspect of the present invention.

圖2係顯示本發明之另一態樣之積層體的概略平面圖。 Fig. 2 is a schematic plan view showing a laminate of another aspect of the present invention.

圖3係顯示本發明之又另一態樣之積層體的概略平面圖。 Fig. 3 is a schematic plan view showing a laminate of still another aspect of the present invention.

圖4係顯示本發明之圖像顯示裝置的概略剖面圖。 Fig. 4 is a schematic sectional view showing the image display device of the present invention.

以下參照圖式的同時說明本發明之實施型態，惟本發明並非限定於以下之實施型態。以下所有圖式中，為了易於理解各構成要件，而以適宜調整後的縮尺顯示，圖式所示之各構成要件的縮尺與實際的構成要件的縮尺未必一致。 Embodiments of the present invention will be described below while referring to the drawings, but the present invention is not limited to the following embodiments. In all the drawings below, each constituent element is displayed on a scale adjusted appropriately for easy understanding, and the scale of each constituent element shown in the drawing may not necessarily match the scale of the actual constituent element.

<積層體> <laminate>

本發明之積層體係依序積層有玻璃板、第1貼合層及偏光片，玻璃板之厚度係100μm以下，第1貼合層之厚度係10μm以下，第1貼合層包含活性能量線硬化性組成物之硬化物或感壓接著劑組成物。 The lamination system of the present invention is laminated with a glass plate, a first bonding layer and a polarizer in sequence, the thickness of the glass plate is below 100 μm , the thickness of the first bonding layer is below 10 μm , and the first bonding layer includes Cured product of active energy ray curable composition or pressure sensitive adhesive composition.

針對積層體係參照圖1的同時進行說明。圖1所示之積層體10係依序積層有玻璃板1、第1貼合層2及偏光片3。如圖1所示，積層體10係玻璃板1及偏光片3均以與第1貼合層2直接地接觸的方式積層。玻璃板1通常不透水。因此，藉由使玻璃板1及偏光片3均以與第1貼合層2直接地接觸的方式積層，則可在玻璃板側之偏光片面，阻擋大氣中之水分的吸收。亦即，能夠將顯示吸濕性之偏光片表面積減半，可抑制偏光片3對大氣中之水分的吸收，並可抑制偏光片3之水分量的變化。就抑制耐熱試驗後之偏光度降低之點而言，以抑制偏光片3之水分量的變化為較佳。 The laminated system will be described with reference to FIG. 1 . In the laminated body 10 shown in FIG. 1 , a glass plate 1 , a first bonding layer 2 and a polarizer 3 are laminated in this order. As shown in FIG. 1 , the laminated body 10 is laminated so that both the glass plate 1 and the polarizer 3 are in direct contact with the first bonding layer 2 . The glass pane 1 is generally impermeable to water. Therefore, by laminating both the glass plate 1 and the polarizer 3 in direct contact with the first bonding layer 2, the absorption of moisture in the atmosphere can be blocked on the polarizer surface on the glass plate side. That is, the surface area of the polarizer showing hygroscopicity can be halved, the absorption of moisture in the atmosphere by the polarizer 3 can be suppressed, and the change in the moisture content of the polarizer 3 can be suppressed. In terms of suppressing the decrease in the degree of polarization after the heat resistance test, it is preferable to suppress the change in the moisture content of the polarizer 3 .

積層體10有著耐熱試驗後之偏光度的變化量小之傾向。積層體10在耐熱試驗後之偏光度的變化量，例如可為0.01以上0.25以下，較佳為0.03以上0.2以下，更佳為0.05以上0.1以下。耐熱試驗及偏光度之變化量係根據後述實施例之欄中說明的方法而測定。 The laminated body 10 tends to have a small amount of change in the degree of polarization after the heat resistance test. The amount of change in the degree of polarization of the laminate 10 after the heat resistance test is, for example, 0.01 to 0.25, preferably 0.03 to 0.2, more preferably 0.05 to 0.1. The heat resistance test and the amount of change in the degree of polarization were measured in accordance with the methods described in the section of Examples described later.

積層體10之俯視時之形狀(以下，亦稱為俯視形狀)，例如可為方形形狀，較佳為具有長邊與短邊的方形形狀，更佳為長方形。構成積層體10之各層可對角部進行R加工、對端部進行切口加工、或在俯視之面內進行開孔加工。本說明書中，俯視意指從層之厚度方向(積層方向)觀看者。 The shape of the laminated body 10 in plan view (hereinafter also referred to as plan view shape) may be, for example, a square shape, preferably a square shape having long sides and short sides, more preferably a rectangle. Each layer constituting the laminated body 10 may be subjected to R processing at the corner, notch processing at the end, or drilling processing in the plane viewed from above. In this specification, planar view means a view from the thickness direction (lamination direction) of a layer.

此外，方形形狀之積層體10可為以長形狀而捲成卷狀者。 In addition, the square-shaped laminated body 10 may be rolled in a long shape.

積層體10之俯視形狀屬於長方形之情況下，長邊之長度例如可為10mm以上500mm以下，較佳為50mm以上300mm以下，更佳為100mm以上200mm以下。短邊之長度，例如可為5mm以上400mm以下，較佳為20mm以上300mm以下，更佳為40mm以上200mm以下，再更佳為60mm以上180mm以下。 When the top view shape of the laminate 10 is a rectangle, the length of the long side may be, for example, 10 mm to 500 mm, preferably 50 mm to 300 mm, more preferably 100 mm to 200 mm. The length of the short side can be, for example, not less than 5 mm and not more than 400 mm, preferably not less than 20 mm and not more than 300 mm, more preferably not less than 40 mm and not more than 200 mm, and still more preferably not less than 60 mm and not more than 180 mm.

積層體10之厚度並無特別限定，惟例如可為60μm以下，較佳為50μm以下，更佳為40μm以下，再更佳為35μm以下。積層體10之厚度通常為30μm以上。 The thickness of the laminate 10 is not particularly limited, but may be, for example, 60 μm or less, preferably 50 μm or less, more preferably 40 μm or less, and more preferably 35 μm or less. The thickness of the laminate 10 is usually 30 μm or more.

積層體10可為能夠彎曲者。能夠彎曲意指可彎曲且不會產生裂縫。積層體10可為以玻璃板1側作為內側及外側之至少任一者而能夠彎曲，較佳係以玻璃板1側作為內側而能夠彎曲。本說明書中，彎曲中可包含彎曲部分形成有曲面之彎折的型態。彎折的型態中，經彎折之內面的曲率半徑並無特別限定。此外，彎曲中可包含：內面之曲折角為大於0°且未達180°之曲折型態、及內面之曲率半徑接近零或內面之曲折角為0°之折疊的型態。 The laminated body 10 may be bendable. Bendable means bendable without cracks. The laminated body 10 may be bendable with the glass plate 1 side as at least any one of the inner side and the outer side, and is preferably bendable with the glass plate 1 side as the inner side. In this specification, bending may include a bent form in which a curved portion is formed with a curved surface. In the bent form, the radius of curvature of the bent inner surface is not particularly limited. In addition, the bending may include: a bending type in which the bending angle of the inner surface is greater than 0° and less than 180°, and a folding type in which the radius of curvature of the inner surface is close to zero or the bending angle of the inner surface is 0°.

積層體10可配置於圖像顯示裝置。在積層體配置於圖像顯示裝置之情況下，積層體係配置於圖像顯示裝置之視認側，較佳係以構成圖像顯示裝置之視認側之最表面的方式而配置，更佳係以由玻璃板1構成圖像顯示裝置之 視認側之最表面的方式而配置。圖像顯示裝置並無特別限定，可列舉例如：有機電致發光(有機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。在積層體10能夠彎曲之情況下，積層體10適合用於可撓式顯示器。 The laminated body 10 can be arranged in an image display device. In the case where the laminate is arranged on an image display device, the laminate system is arranged on the viewing side of the image display device, preferably in such a way as to constitute the outermost surface of the viewing side of the image display device, more preferably by The glass plate 1 constitutes an image display device It is configured according to the most superficial way of the recognition side. The image display device is not particularly limited, and examples thereof include organic electroluminescence (organic EL) display devices, inorganic electroluminescence (inorganic EL) display devices, liquid crystal display devices, and electroluminescent display devices. When the laminated body 10 is bendable, the laminated body 10 is suitably used for a flexible display.

[玻璃板] [glass plate]

玻璃板1可藉由在偏光片3之單側經介第1貼合層2而積層，而具有保護偏光片3及其表面的機能。本說明書中，用語「玻璃板」中係包含玻璃膜之概念。 The glass plate 1 can be laminated on one side of the polarizer 3 via the first bonding layer 2 , so as to have the function of protecting the polarizer 3 and its surface. In this specification, the term "glass plate" includes the concept of glass film.

玻璃板1之厚度係100μm以下。由於玻璃板1之厚度係100μm以下，故有著易於獲得耐熱試驗後之偏光度之變化量少的積層體之傾向。玻璃板1之厚度，就易於降低耐熱試驗後之偏光度的變化量之觀點而言，較佳為90μm以下，更佳為80μm以下，再更佳為70μm以下，特佳為60μm以下，更特佳為50μm以下。玻璃板1之厚度通常為10μm以上，就易於降低耐熱試驗後之偏光度的變化量之觀點而言，較佳為20μm以上，更佳為30μm以上。 The thickness of the glass plate 1 is 100 μm or less. Since the thickness of the glass plate 1 is 100 μm or less, it tends to be easy to obtain a laminate with little change in polarization degree after the heat resistance test. The thickness of the glass plate 1 is preferably not more than 90 μm , more preferably not more than 80 μm, still more preferably not more than 70 μm , and most preferably from the viewpoint of reducing the amount of change in the degree of polarization after the heat resistance test. 60 μm or less, more preferably 50 μm or less. The thickness of the glass plate 1 is usually at least 10 μm , and is preferably at least 20 μm , more preferably at least 30 μm , from the viewpoint of ease of reducing the amount of change in polarization degree after the heat resistance test.

玻璃板1可為例如化學強化玻璃。在玻璃板1為化學強化玻璃之情況下，就強度及透光性之觀點而言，屬有利者。藉由使用化學強化玻璃，在保持積層體10之能夠彎曲性的同時，亦可使積層體之耐衝撃性提升。化學強化玻璃，可藉由玻璃之化學性離子交換處理而得。藉由化學性離子交換處理，將玻璃表面之鈉離子、鋰離子部分地取代成離子半徑較大的鉀離子，而可使玻璃表面之強度提升。藉由形成薄的壓縮應力層，而提升表面強度。使用於化學強化玻璃之玻璃可列舉例如：鋁矽酸鹽玻璃、鈉鈣玻璃、硼矽酸鹽玻璃、鉛玻璃、鹼性鋇玻璃、及鋁硼矽酸鹽玻璃等。 The glass sheet 1 may be, for example, chemically strengthened glass. When the glass plate 1 is chemically strengthened glass, it is advantageous from the viewpoint of strength and translucency. By using chemically strengthened glass, the impact resistance of the laminate can be improved while maintaining the bendability of the laminate 10 . Chemically strengthened glass can be obtained by chemical ion exchange treatment of glass. Through chemical ion exchange treatment, sodium ions and lithium ions on the glass surface are partially replaced with potassium ions with larger ionic radius, which can improve the strength of the glass surface. Improves surface strength by forming a thin compressive stress layer. Examples of glass used in chemically strengthened glass include aluminosilicate glass, soda lime glass, borosilicate glass, lead glass, alkali barium glass, and aluminoborosilicate glass.

化學性離子交換處理，可藉由將上述玻璃浸漬於已加熱至熔點以上後的離子取代溶液，或將糊狀的離子取代溶液直接塗佈於玻璃而進行。離子取代溶液可列舉：以硝酸鉀、碳酸鉀、碳酸氫鉀、磷酸鉀、硫酸鉀及氫氧化鉀為基礎者等。其中，就熔點低於玻璃之熔點(通常500℃以上600℃以下)且易於處理而言，硝酸鉀(330℃)為較佳者。 The chemical ion exchange treatment can be carried out by immersing the above-mentioned glass in the ion substitution solution heated above the melting point, or directly coating the pasty ion substitution solution on the glass. Examples of ion substitution solutions include those based on potassium nitrate, potassium carbonate, potassium bicarbonate, potassium phosphate, potassium sulfate, and potassium hydroxide. Among them, potassium nitrate (330° C.) is preferable in terms of melting point lower than that of glass (usually 500° C. to 600° C.) and ease of handling.

化學性離子交換處理前，可進行蝕刻處理而使玻璃薄膜化。蝕刻處理，可使用氫氟酸或此與氟化銨水溶液以及有機酸(例如甲酸、乙酸、丙酸等)混合者作為化學處理溶液而進行。可使用此等，並藉由噴射、浸漬等進行蝕刻。蝕刻處理，可使用含氟之非活性氣體，例如，包含CF4、C3F8、C2F6、XeF2等之至少1種的He氣或Ar氣作為蝕刻氣體而進行。具體而言，可將經He氣或Ar氣稀釋的含氟之非活性氣體在大氣壓下電漿化，從氟化碳使氟游離，藉此而進行蝕刻。 Before chemical ion exchange treatment, etching treatment can be performed to make the glass thinner. The etching treatment can be performed using hydrofluoric acid or a mixture thereof with an ammonium fluoride aqueous solution and an organic acid (such as formic acid, acetic acid, propionic acid, etc.) as a chemical treatment solution. These can be used and etched by spraying, dipping, etc. The etching process can be performed using an inert gas containing fluorine, for example, He gas or Ar gas containing at least one of CF 4 , C 3 F 8 , C 2 F 6 , XeF 2 , etc., as an etching gas. Specifically, etching can be performed by plasmating a fluorine-containing inert gas diluted with He gas or Ar gas under atmospheric pressure to release fluorine from fluorinated carbon.

在本發明之積層體10貼合於後述圖像顯示元件8並組裝於圖像顯示裝置40之情況下，玻璃板1通常成為前面板，而成為圖像顯示裝置40之視認側的最表面。因此，在玻璃板1之與偏光片側為相反側的表面，可設置表面處理層。表面處理層可列舉例如：防止玻璃板1之表面之光反射的防反射層、使在表面反射之光進行擴散以使視認性提升的防眩層、防止水滴附著於表面的撥水層、防止油分附著於表面的撥油層等。又，前面板係配置於圖像顯示裝置之最前面並保護圖像顯示裝置的板。 When the laminated body 10 of the present invention is attached to an image display element 8 described later and assembled in an image display device 40 , the glass plate 1 usually becomes the front panel and becomes the outermost surface on the viewing side of the image display device 40 . Therefore, a surface treatment layer may be provided on the surface of the glass plate 1 opposite to the polarizer side. Examples of the surface treatment layer include: an anti-reflection layer that prevents reflection of light on the surface of the glass plate 1, an anti-glare layer that diffuses light reflected on the surface to improve visibility, a water-repellent layer that prevents water droplets from adhering to the surface, and an anti-glare layer that prevents water droplets from adhering to the surface. Oil adheres to the oil-repellent layer on the surface, etc. Also, the front panel is a plate arranged at the front of the image display device to protect the image display device.

在玻璃板1之與偏光片側為相反側的表面，直到被組裝至圖像顯示裝置為止、或在組裝後圖像被顯示與使用為止，可將用於防止玻璃板1表面刮傷等之表面保護膜可剝離地積層，而形成附表面保護膜之積層體。 On the surface of the glass plate 1 opposite to the polarizer side, until it is assembled into an image display device, or until the image is displayed and used after assembly, it can be used to prevent the surface of the glass plate 1 from being scratched, etc. The protective film can be peeled off to form a laminate with a surface protective film.

[第1貼合層] [1st bonding layer]

第1貼合層2係配置於玻璃板1與偏光片3之間，並具有接合此等的機能。第1貼合層2可具有單層結構或多層結構，較佳係具有單層結構。 The 1st bonding layer 2 is arrange|positioned between the glass plate 1 and the polarizer 3, and has the function of bonding these. The first bonding layer 2 can have a single-layer structure or a multi-layer structure, and preferably has a single-layer structure.

第1貼合層2之厚度係10μm以下。由於第1貼合層2之厚度係10μm以下，故有著易於獲得耐熱試驗後之偏光度之變化量少的積層體之傾向。第1貼合層2之厚度，就耐熱試驗後之偏光度之變化量易於降低之觀點而言，較佳為8μm以下，更佳為6μm以下。第1貼合層2之厚度通常為0.1μm以上，就接合性之觀點而言，較佳為0.5μm以上，更佳為1μm以上。 The thickness of the first bonding layer 2 is 10 μm or less. Since the thickness of the first bonding layer 2 is 10 μm or less, it tends to be easy to obtain a laminate with a small amount of change in the degree of polarization after the heat resistance test. The thickness of the first bonding layer 2 is preferably 8 μm or less, more preferably 6 μm or less, from the viewpoint of easily reducing the amount of change in the degree of polarization after the heat resistance test. The thickness of the first bonding layer 2 is usually at least 0.1 μm , preferably at least 0.5 μm , more preferably at least 1 μm from the viewpoint of adhesiveness.

第1貼合層2包含活性能量線硬化性組成物之硬化物或感壓接著劑組成物。第1貼合層2可從活性能量線硬化性組成物或感壓接著劑組成物形成。藉由從活性能量線硬化性組成物之硬化物或感壓接著劑組成物形成第1貼合層2，則有著易於獲得耐熱試驗後之偏光度之變化量少的積層體之傾向。 The first bonding layer 2 includes a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition. The first bonding layer 2 can be formed from an active energy ray-curable composition or a pressure-sensitive adhesive composition. By forming the first bonding layer 2 from a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition, it tends to be easy to obtain a laminate with little change in polarization degree after a heat resistance test.

活性能量線硬化性組成物具有接受如紫外線或電子束般的活性能量線之照射而硬化的性質。活性能量線硬化性組成物可為自由基聚合性之(甲基)丙烯酸系化合物與光自由基聚合起始劑之混合物、或陽離子聚合性之環氧化合物與光陽離子聚合起始劑之混合物等。此外，亦可併用陽離子聚合性之環氧化合物與自由基聚合性之(甲基)丙烯酸系化合物，並且併用光陽離子聚合起始劑與光自由基聚合起始劑作為起始劑。 The active energy ray-curable composition has a property of being cured by being irradiated with active energy rays such as ultraviolet rays or electron beams. The active energy ray curable composition can be a mixture of a radically polymerizable (meth)acrylic compound and a photoradical polymerization initiator, or a mixture of a cationic polymerizable epoxy compound and a photocationic polymerization initiator, etc. . In addition, a cationic polymerizable epoxy compound and a radical polymerizable (meth)acrylic compound may be used in combination, and a photocationic polymerization initiator and a photoradical polymerization initiator may be used in combination as an initiator.

在第1貼合層2包含活性能量線硬化性組成物之硬化物之情況下，第1貼合層2之厚度，就耐熱試驗後之偏光度之變化量的抑制之觀點而言，較佳為0.1μm以上5μm以下，更佳為0.5μm以上3μm以下。 In the case where the first bonding layer 2 contains a cured product of an active energy ray-curable composition, the thickness of the first bonding layer 2 is preferable from the viewpoint of suppressing the amount of change in the degree of polarization after the heat resistance test. It is not less than 0.1 μm and not more than 5 μm , more preferably not less than 0.5 μm and not more than 3 μm .

在使用活性能量線硬化性組成物之情況下，關於第1貼合層2之形成，例如，將活性能量線硬化性組成物塗佈於玻璃板1及偏光片3之至少一者的貼合面，將玻璃板1及偏光片貼合後，藉由照射活性能量線，而使活性能量線硬化性組成物硬化。活性能量線之光源並無特別限定，惟較佳係在波長400nm以下具有發光分佈的活性能量線(紫外線)，具體而言，較佳使用低壓汞燈、中壓汞燈、高壓汞燈、超高壓汞燈、捕蟲器用螢光燈、黑光燈、微波激發汞燈、金屬鹵素燈等。活性能量線之照射量，例如可為100mJ以上1500mJ以下，就耐熱試驗後之偏光度之變化量的抑制之觀點而言，較佳為100mJ以上1200mJ以下，再更佳為100mJ以上400mJ以下。 In the case of using an active energy ray-curable composition, the formation of the first bonding layer 2 is, for example, lamination of applying the active energy ray-curable composition to at least one of the glass plate 1 and the polarizer 3 On the other hand, after bonding the glass plate 1 and the polarizer together, the active energy ray-curable composition is cured by irradiating the active energy ray. The light source of the active energy ray is not particularly limited, but it is preferably an active energy ray (ultraviolet ray) having a luminescence distribution below a wavelength of 400nm. High-pressure mercury lamps, fluorescent lamps for insect traps, black light lamps, microwave-excited mercury lamps, metal halide lamps, etc. The irradiation amount of active energy rays may be, for example, 100 mJ to 1500 mJ. From the viewpoint of suppressing the change in polarization degree after the heat resistance test, it is preferably 100 mJ to 1200 mJ, and more preferably 100 mJ to 400 mJ.

感壓接著劑組成物在硬化反應後之狀態係高黏度液體或凝膠狀固體，在常溫(例如，溫度23℃至25℃，相對濕度55至60%)以短時間施壓輕微壓力即可與黏附體接著。感壓接著劑組成物，例如，可由將如(甲基)丙烯酸系、橡膠系、胺甲酸酯系、酯系、聚矽氧系、聚乙烯醚系般的樹脂作為主成分之黏著劑組成物構成。其中，就透明性、耐候性、耐熱性及儲存彈性模數之觀點而言，較佳係將(甲基)丙烯酸系樹脂作為基底聚合物的感壓接著劑組成物。感壓接著劑組成物可為活性能量線硬化型或熱硬化型。 The state of the pressure-sensitive adhesive composition after the hardening reaction is a high-viscosity liquid or a gel-like solid. It is sufficient to apply light pressure for a short time at room temperature (for example, temperature 23°C to 25°C, relative humidity 55-60%) Bonded with adherends. The pressure-sensitive adhesive composition, for example, can be composed of an adhesive mainly composed of (meth)acrylic, rubber, urethane, ester, polysiloxane, and polyvinyl ether resins. things constitute. Among them, a pressure-sensitive adhesive composition using a (meth)acrylic resin as a base polymer is preferable from the viewpoint of transparency, weather resistance, heat resistance, and storage elastic modulus. The pressure-sensitive adhesive composition may be active energy ray-curable or thermal-curable.

用於感壓接著劑組成物之(甲基)丙烯酸系樹脂(基底聚合物)，適合使用例如：(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-乙基己酯等(甲基)丙烯酸酯之1種或2種以上作為單體的聚合物或共聚物。基底聚合物中，較佳係使極性單體共聚合。極性單體可列舉例如：(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、(甲 基)丙烯酸N,N-二甲基胺基乙酯、(甲基)丙烯酸縮水甘油酯等具有羧基、羥基、醯胺基、胺基、環氧基等之單體。 (Meth)acrylic resins (base polymers) used in pressure-sensitive adhesive compositions, such as: butyl (meth)acrylate, ethyl (meth)acrylate, isooctyl (meth)acrylate , Polymers or copolymers of one or more (meth)acrylates such as 2-ethylhexyl (meth)acrylate as monomers. Among the base polymers, it is preferable to copolymerize polar monomers. Examples of polar monomers include: (meth)acrylic acid, 2-hydroxypropyl (meth)acrylate, hydroxyethyl (meth)acrylate, (meth)acrylamide, (meth)acrylic acid Base) N,N-dimethylaminoethyl acrylate, glycidyl (meth)acrylate and other monomers with carboxyl, hydroxyl, amido, amine, epoxy, etc.

感壓接著劑組成物可為僅包含上述基底聚合物者，惟通常更含有交聯劑。交聯劑可例示：屬於2價以上之金屬離子且會與羧基之間形成羧酸金屬鹽者；屬於多胺化合物且會與羧基之間形成醯胺鍵者；屬於聚環氧化合物或多元醇且會與羧基之間形成酯鍵者；屬於聚異氰酸酯化合物且會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 pressure-sensitive adhesive composition may only contain the above-mentioned base polymer, but usually further contains a cross-linking agent. Examples of cross-linking agents include metal ions with a valence of more than 2 and the formation of carboxyl metal salts with carboxyl groups; polyamine compounds that form amide bonds with carboxyl groups; polyepoxides or polyols Those that can form ester bonds with carboxyl groups; those that belong to polyisocyanate compounds and can form amide bonds with carboxyl groups. Among them, polyisocyanate compounds are preferred.

在第1貼合層2包含感壓接著劑組成物之情況下，關於第1貼合層2之形成，可藉由例如在甲苯或乙酸乙酯等有機溶劑中使感壓接著劑組成物溶解或分散以調製感壓接著劑液，並將此直接塗佈於貼合面而形成感壓接著劑層的方式；或在已經實施離型處理之分離膜上將感壓接著劑層形成為片狀，並將此轉移至貼合面的方式等而進行。 When the first bonding layer 2 contains a pressure-sensitive adhesive composition, the formation of the first bonding layer 2 can be carried out by dissolving the pressure-sensitive adhesive composition in an organic solvent such as toluene or ethyl acetate, for example. Or disperse to prepare a pressure-sensitive adhesive liquid, and directly apply it on the bonding surface to form a pressure-sensitive adhesive layer; or form a pressure-sensitive adhesive layer into a sheet on a separation film that has been subjected to release treatment shape, and transfer this to the bonding surface, etc.

分離膜可為由聚乙烯等聚乙烯系樹脂、聚丙烯等聚丙烯系樹脂、聚對酞酸乙二酯等聚酯系樹脂等所構成之膜。其中，較佳為聚對酞酸乙二酯的延伸膜。 The separation membrane may be a film made of polyethylene-based resins such as polyethylene, polypropylene-based resins such as polypropylene, polyester-based resins such as polyethylene terephthalate, and the like. Among them, a stretched film of polyethylene terephthalate is preferable.

感壓接著劑組成物可包含任意成分，例如：由玻璃纖維、玻璃珠粒、樹脂珠粒、金屬粉或其他無機粉末所構成之填充劑、顏料、著色劑、抗氧化劑、紫外線吸收劑、抗靜電劑等。 The pressure-sensitive adhesive composition can contain any components, such as fillers, pigments, colorants, antioxidants, UV absorbers, anti- Static agent etc.

在第1貼合層2包含感壓接著劑組成物之情況下，第1貼合層2之厚度，例如可為1μm以上10μm以下之範圍，較佳為2μm以上8μm以下，更佳為3μm以上6μm以下。 In the case where the first bonding layer 2 includes a pressure-sensitive adhesive composition, the thickness of the first bonding layer 2 can be, for example, in the range of 1 μm to 10 μm , preferably 2 μm to 8 μm m or less, more preferably 3 μm or more and 6 μm or less.

[偏光片] [Polarizer]

偏光片3可列舉：吸附有二色性色素的延伸膜或延伸層、或者塗佈二色性色素並使其硬化而成的膜等。二色性色素可列舉例如：二色性色素。二色性色素，具體而言，可使用碘或二色性之有機染料。二色性有機染料中，包含由C.I.DIRECT RED 39等雙偶氮化合物所構成之二色性直接染料、由參偶氮、肆偶氮等之化合物所構成之二色性直接染料。 Examples of the polarizer 3 include a stretched film or a stretched layer in which a dichroic dye is adsorbed, or a film in which a dichroic dye is applied and cured. As a dichroic dye, a dichroic dye is mentioned, for example. As a dichroic dye, specifically, iodine or a dichroic organic dye can be used. Dichroic organic dyes include dichroic direct dyes composed of disazo compounds such as C.I.DIRECT RED 39, and dichroic direct dyes composed of compounds such as para-azo and quaternary azo.

塗佈二色性色素並使其硬化而成的膜可列舉：塗佈包含具有液晶性之二色性色素的組成物或包含二色性色素與聚合性液晶之組成物並使其硬化而獲得之層等的包含聚合性液晶化合物之硬化物的膜等。相較於吸附有二色性色素的延伸膜、或延伸層，塗佈二色性色素並使其硬化而成的膜因無限制彎曲方向而為較佳。 Films obtained by applying a dichroic dye and curing it include: coating a composition containing a liquid crystalline dichroic dye or a composition containing a dichroic dye and a polymerizable liquid crystal, and curing it A film or the like made of a cured product of a polymerizable liquid crystal compound, such as a layer. Compared to a stretched film or a stretched layer on which a dichroic dye is adsorbed, a film obtained by applying and curing a dichroic dye is preferable because the bending direction is not restricted.

(1)屬於延伸膜或延伸層的偏光片 (1) Polarizers belonging to stretched film or stretched layer

首先，針對屬於吸附有二色性色素的延伸膜之偏光片進行說明。吸附有二色性色素的延伸膜，通常可經過下述步驟而製造：將聚乙烯醇系樹脂膜單軸延伸之步驟、將聚乙烯醇系樹脂膜以二色性色素染色藉此使此二色性色素吸附的步驟、將吸附有二色性色素之聚乙烯醇系樹脂膜以硼酸水溶液進行處理的步驟、及藉由硼酸水溶液而進行之處理後進行水洗的步驟。屬於吸附有二色性色素的延伸膜之偏光片的厚度，例如2μm以上40μm以下。 First, a polarizer that is a stretched film on which a dichroic dye is adsorbed will be described. The stretched film to which the dichroic dye is adsorbed is usually manufactured through the steps of uniaxially stretching the polyvinyl alcohol resin film, dyeing the polyvinyl alcohol resin film with the dichroic dye to thereby make the dichroic dye A step of adsorbing a chromatic dye, a step of treating the polyvinyl alcohol-based resin film adsorbed with a dichroic dye with an aqueous boric acid solution, and a step of washing with water after the treatment with an aqueous boric acid solution. The thickness of the polarizer belonging to the stretched film on which the dichroic dye is adsorbed is, for example, not less than 2 μm and not more than 40 μm .

聚乙烯醇系樹脂係藉由將聚乙酸乙烯酯系樹脂皂化而獲得。聚乙酸乙烯酯系樹脂，除了可使用屬於乙酸乙烯酯之均聚物的聚乙酸乙烯酯以外，還可使用乙酸乙烯酯和能與乙酸乙烯酯共聚合之其他單體的共聚物。能與乙酸乙烯酯共聚合之其他單體可列舉例如：不飽和羧酸類、烯烴類、乙烯基醚類、不飽和磺酸類、具有銨基之(甲基)丙烯醯胺類等。 The polyvinyl alcohol-based resin is obtained by saponifying polyvinyl acetate-based resin. As the polyvinyl acetate resin, in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, copolymers of vinyl acetate and other monomers that can be copolymerized with vinyl acetate can be used. Examples of other monomers that can be copolymerized with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and (meth)acrylamides having ammonium groups.

聚乙烯醇系樹脂之皂化度通常為85至100莫耳%，較佳為98莫耳%以上。聚乙烯醇系樹脂可被改質，例如，亦可使用經醛類改質的聚乙烯醇縮甲醛或聚乙烯醇縮乙醛。聚乙烯醇系樹脂之聚合度，通常為1000以上10000以下，較佳為1500以上5000以下。 The degree of saponification of the polyvinyl alcohol-based resin is usually 85 to 100 mol%, preferably more than 98 mol%. The polyvinyl alcohol-based resin may be modified, for example, polyvinyl formal or polyvinyl acetal modified with aldehydes may also be used. The degree of polymerization of the polyvinyl alcohol-based resin is usually not less than 1,000 and not more than 10,000, preferably not less than 1,500 and not more than 5,000.

偏光片3可在組裝於積層體10前調整偏光片3中的水分率。偏光片3之水分率，較佳為15質量%以下，更佳為10質量%以下，再更佳為9.9質量%以下。此外，偏光片3之水分率較佳為4質量%以上。 Before the polarizer 3 is assembled into the laminate 10 , the moisture content in the polarizer 3 can be adjusted. The moisture content of the polarizer 3 is preferably at most 15% by mass, more preferably at most 10% by mass, and still more preferably at most 9.9% by mass. In addition, the moisture content of the polarizer 3 is preferably 4% by mass or more.

其次，針對屬於吸附有二色性色素的延伸層之偏光片進行說明。吸附有二色性色素的延伸層，通常可經過下述步驟而製造：將包含上述聚乙烯醇系樹脂的塗佈液塗佈於基材膜上的步驟、將獲得的積層膜進行單軸延伸的步驟、將經單軸延伸的積層膜之聚乙烯醇系樹脂層以二色性色素進行染色藉此吸附此二色性色素而製成偏光片的步驟、將吸附有二色性色素之膜以硼酸水溶液進行處理的步驟、及在藉由硼酸水溶液所進行之處理後進行水洗的步驟。基材膜，可在將偏光片組裝於積層體時從偏光片剝離除去，亦可與偏光片一起組裝於積層體。基材膜之材料及厚度，可與後述保護層之說明中例示的熱塑性樹脂膜之材料及厚度相同。 Next, a polarizer which is an extension layer on which a dichroic dye is adsorbed will be described. The stretched layer to which the dichroic dye is adsorbed is usually produced through the steps of applying a coating liquid containing the above-mentioned polyvinyl alcohol-based resin on the base film, and uniaxially stretching the obtained laminated film. The step of dyeing the polyvinyl alcohol-based resin layer of the uniaxially stretched laminated film with a dichroic dye to absorb the dichroic dye to make a polarizer, the film with the dichroic dye adsorbed A step of treating with an aqueous boric acid solution, and a step of washing with water after the treatment with an aqueous boric acid solution. The base film may be peeled and removed from the polarizer when assembling the polarizer in the laminate, or may be assembled in the laminate together with the polarizer. The material and thickness of the base film may be the same as those of the thermoplastic resin film exemplified in the description of the protective layer described later.

(2)屬於塗佈二色性色素並使其硬化而成的膜之偏光片 (2) Polarizers that are films formed by coating and curing dichroic pigments

塗佈二色性色素並使其硬化而成的膜可列舉例如：包含「將包含具有液晶性之二色性色素的組成物或包含二色性色素與液晶化合物的組成物，塗佈在因應需要而形成有偏光片用配向膜之基材並使其硬化而成的硬化物」之膜。基材之材料及厚度，可與後述保護層之說明中例示的熱塑性樹脂膜之材料及厚度相同。基 材可在將偏光片組裝於積層體時從偏光片剝離除去，亦可與偏光片一起組裝於積層體。 The film formed by applying a dichroic dye and making it harden includes, for example, "coating a composition containing a dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a liquid crystal compound on a corresponding A film of a hardened product formed by forming and curing a base material of an alignment film for a polarizer if necessary. The material and thickness of the base material may be the same as those of the thermoplastic resin film exemplified in the description of the protective layer described later. base The material may be peeled and removed from the polarizer when assembling the polarizer in the laminate, or may be assembled in the laminate together with the polarizer.

塗佈二色性色素並使其硬化而成的膜係以薄者為較佳，惟過薄則強度降低，而有著加工性差之傾向。該膜之厚度通常為20μm以下，較佳為5μm以下，更佳為0.5μm以上3μm以下。 It is better to apply a dichroic pigment and harden the film to be thinner, but if it is too thin, the strength will decrease and the workability will tend to be poor. The thickness of the film is usually not more than 20 μm , preferably not more than 5 μm , more preferably not less than 0.5 μm and not more than 3 μm .

塗佈二色性色素並使其硬化而成的膜，具體而言，可列舉日本特開2013-37353號公報及日本特開2013-33249號公報等所記載者。 As for the film obtained by applying and curing a dichroic dye, specifically, those described in JP-A-2013-37353 and JP-A-2013-33249 can be mentioned.

偏光片用配向膜可在「上述基材」與「包含具有液晶性之二色性色素的組成物、或包含二色性色素與液晶化合物之組成物的硬化物之層」之間配置。偏光片用配向膜具有使形成於其上之液晶層在期望的方向液晶配向之配向限制力。偏光片用配向膜可列舉：以配向性聚合物所形成的配向性聚合物層、以光配向聚合物所形成的光配向性聚合物層、在層表面具有凹凸圖案或複數個溝(groove)的溝配向膜。偏光片用配向膜之厚度，例如可為10nm以上500nm以下，較佳為10nm以上200nm以下。 The alignment film for a polarizer can be arranged between "the aforementioned substrate" and "a layer comprising a composition comprising a liquid crystalline dichroic dye, or a cured product comprising a composition comprising a dichroic dye and a liquid crystal compound". The alignment film for a polarizer has an alignment restriction force for aligning liquid crystals in a desired direction in a liquid crystal layer formed thereon. Alignment films for polarizers include: alignment polymer layers formed with alignment polymers, photo-alignment polymer layers formed with photo-alignment polymers, and layers with concavo-convex patterns or multiple grooves on the surface. trench alignment film. The thickness of the alignment film for polarizers may be, for example, not less than 10 nm and not more than 500 nm, preferably not less than 10 nm and not more than 200 nm.

配向性聚合物層可藉由將已使配向性聚合物溶解於溶劑中而成的組成物塗佈在基材並除去溶劑，因應需要，進行摩擦處理而形成。於此之情況下，在以配向性聚合物所形成的配向性聚合物層中，能夠藉由配向性聚合物之表面狀態及摩擦條件，而任意地調整配向限制力。 The alignment polymer layer can be formed by applying a composition obtained by dissolving an alignment polymer in a solvent to a substrate, removing the solvent, and performing rubbing treatment if necessary. In this case, in the alignment polymer layer formed of the alignment polymer, the alignment restriction force can be adjusted arbitrarily according to the surface state of the alignment polymer and rubbing conditions.

光配向性聚合物層可藉由在基材塗佈包含具有光反應性基之聚合物或單體與溶劑之組成物，並進行偏光照射而形成。於此之情況下，在光配向性聚合物層中，能夠藉由對於光配向性聚合物之偏光照射條件等，而任意地調整配向限制力。 The photo-alignment polymer layer can be formed by coating a composition comprising a polymer or monomer with a photoreactive group and a solvent on a substrate, and irradiating with polarized light. In this case, in the photo-alignment polymer layer, the alignment-regulating force can be adjusted arbitrarily according to the polarized light irradiation conditions and the like to the photo-alignment polymer.

溝配向膜可藉由下述方法形成，例如：在感光性聚醯亞胺膜表面經介具有圖案形狀之狹縫的曝光用遮罩進行曝光、顯影等以形成凹凸圖案的方法；在表面具有溝之板狀的原盤，形成活性能量線硬化性樹脂之未硬化的層，將該層轉移至基材並進行硬化的方法；在基材形成活性能量線硬化性樹脂之未硬化的層，藉由將具有凹凸之輥狀的原盤壓在該層等以形成凹凸並使其硬化的方法等。 The trench alignment film can be formed by the following methods, for example: a method of exposing and developing a concave-convex pattern on the surface of the photosensitive polyimide film through an exposure mask having a pattern-shaped slit; A method of forming an uncured layer of an active energy ray-curable resin on a plate-shaped master plate of a groove, transferring the layer to a base material and hardening it; forming an uncured layer of an active energy ray-curable resin on the base material, by A method such as pressing a roll-shaped original disk having unevenness on the layer to form unevenness and hardening.

[其他構成要件] [Other constituent elements]

積層體10可更包含第2貼合層、熱塑性樹脂膜、相位差層、黏著劑層、表面保護膜(防護膜，Protect Film)。 The laminate 10 may further include a second bonding layer, a thermoplastic resin film, a retardation layer, an adhesive layer, and a surface protection film (protect film).

[第2貼合層] [Second bonding layer]

第2貼合層具有在偏光片3之與第1貼合層2為相反側接合熱塑性樹脂膜的機能。第2貼合層例如可包含上述第1貼合層之說明中所例示的活性能量線硬化性組成物之硬化物或感壓接著劑組成物，或亦可包含水系接著劑組成物之硬化物。第2貼合層較佳係包含水系接著劑組成物之硬化物。 The second bonding layer has a function of bonding a thermoplastic resin film on the opposite side of the polarizer 3 to the first bonding layer 2 . The second bonding layer may include, for example, a cured product of the active energy ray-curable composition or a pressure-sensitive adhesive composition as exemplified in the description of the first bonding layer above, or may include a cured product of a water-based adhesive composition. . It is preferable that the 2nd bonding layer is a cured product containing a water-based adhesive composition.

水系接著劑組成物可列舉：由聚乙烯醇系樹脂水溶液所構成之接著劑組成物、水系二液型胺甲酸酯系乳液接著劑組成物等。其中，適合使用由聚乙烯醇系樹脂水溶液所構成之水系接著劑組成物。聚乙烯醇系樹脂，除了可使用將屬於乙酸乙烯酯之均聚物的聚乙酸乙烯酯進行皂化處理而得的乙烯醇均聚物以外，還可使用將乙酸乙烯酯和能夠與乙酸乙烯酯共聚合之其他單體的共聚物進行皂化處理而得的聚乙烯醇系共聚物、或將此等之羥基經部分地改質而成的改質聚乙烯醇系聚合物等。水系接著劑組成物可包含：醛化合物(乙二醛等)、環 氧化合物、三聚氰胺系化合物、羥甲基化合物、異氰酸酯化合物、胺化合物、多價金屬鹽等的交聯劑。 Examples of the water-based adhesive composition include: an adhesive composition composed of a polyvinyl alcohol-based resin aqueous solution, a water-based two-component urethane-based emulsion adhesive composition, and the like. Among them, a water-based adhesive composition composed of a polyvinyl alcohol-based resin aqueous solution is suitably used. As polyvinyl alcohol-based resins, in addition to vinyl alcohol homopolymers obtained by saponifying polyvinyl acetate, which is a homopolymer of vinyl acetate, vinyl acetate and vinyl acetate copolymers can also be used. Polyvinyl alcohol-based copolymers obtained by saponifying copolymers of other monomers polymerized, or modified polyvinyl alcohol-based polymers obtained by partially modifying the hydroxyl groups of these polymers. The water-based adhesive composition may contain: aldehyde compounds (glyoxal, etc.), cyclic Crosslinking agent for oxygen compounds, melamine-based compounds, methylol compounds, isocyanate compounds, amine compounds, polyvalent metal salts, etc.

在使用水系接著劑組成物之情況下，層彼此貼合後，為了除去水系接著劑組成物中含有的水，較佳係實施乾燥步驟。乾燥步驟後，可設置例如在20℃以上45℃以下之溫度下進行熟化的熟化步驟。 In the case of using a water-based adhesive composition, it is preferable to perform a drying step in order to remove water contained in the water-based adhesive composition after the layers are bonded together. After the drying step, for example, an aging step of aging at a temperature of 20° C. to 45° C. may be provided.

[熱塑性樹脂膜] [thermoplastic resin film]

熱塑性樹脂膜可具有用於保護偏光片3之表面的機能。熱塑性樹脂膜可在偏光片3之與第1貼合層2側為相反側經介第2貼合層而積層。積層體10即使在偏光片3之與第1貼合層2為相反側經介第2貼合層而將熱塑性樹脂膜積層的情況下，亦有著耐熱試驗後之偏光度的變化量小之傾向。 The thermoplastic resin film may have a function of protecting the surface of the polarizer 3 . The thermoplastic resin film can be laminated via the second bonding layer on the side opposite to the first bonding layer 2 of the polarizer 3 . Even when the laminate 10 is laminated with a thermoplastic resin film via the second bonding layer on the opposite side of the polarizer 3 to the first bonding layer 2, the amount of change in the degree of polarization after the heat resistance test tends to be small. .

熱塑性樹脂膜例如可為具有透光性(較佳係光學上透明)的熱塑性樹脂膜，作為其例，可列舉：鏈狀聚烯烴系樹脂(聚乙烯系樹脂、聚丙烯系樹脂、聚甲基戊烯系樹脂等)、環狀聚烯烴系樹脂(降莰烯系樹脂等)等聚烯烴系樹脂；三乙醯纖維素等纖維素系樹脂；聚對酞酸乙二酯、聚萘二甲酸乙二酯、聚對酞酸丁二酯等聚酯系樹脂；聚碳酸酯系樹脂；乙烯-乙酸乙烯酯系樹脂；聚苯乙烯系樹脂；聚醯胺系樹脂；聚醚醯亞胺系樹脂；聚(甲基)丙烯酸甲酯樹脂等(甲基)丙烯酸系樹脂；聚醯亞胺系樹脂；聚醚碸系樹脂；聚碸系樹脂；聚氯乙烯系樹脂；聚二氯亞乙烯系樹脂；聚乙烯醇系樹脂；聚乙烯醇縮醛系樹脂；聚醚酮系樹脂；聚醚醚酮系樹脂；聚醚碸系樹脂；聚醯胺醯亞胺系樹脂等。熱塑性樹脂，可單獨使用或混合使用2種以上。其中，就強度及透光性之觀點而言，較佳為三乙醯纖維素系樹脂膜、環狀聚烯烴系樹脂膜及(甲基)丙烯酸系樹脂膜。 The thermoplastic resin film may be, for example, a thermoplastic resin film having light transmission (preferably optically transparent), and as an example, chain polyolefin resins (polyethylene resins, polypropylene resins, polymethyl resins, etc.) Pentene-based resins, etc.), polyolefin-based resins such as cyclic polyolefin-based resins (norcamphene-based resins, etc.); cellulose-based resins such as triacetyl cellulose; polyethylene terephthalate, polyethylene naphthalate Polyester-based resins such as ethylene glycol and polybutylene terephthalate; polycarbonate-based resins; ethylene-vinyl acetate-based resins; polystyrene-based resins; polyamide-based resins; polyetherimide-based resins ; (meth)acrylic resins such as poly(methyl)acrylate resin; polyimide resin; polyether resin; polyvinyl chloride resin; polyvinyl chloride resin; polyvinylidene chloride resin ; Polyvinyl alcohol resin; polyvinyl acetal resin; polyether ketone resin; polyether ether ketone resin; Thermoplastic resins can be used alone or in combination of two or more. Among them, from the viewpoint of strength and translucency, triacetylcellulose-based resin films, cyclic polyolefin-based resin films, and (meth)acrylic-based resin films are preferable.

熱塑性樹脂膜之厚度例如可為30μm以下，就薄型化之觀點而言，較佳為25μm以下，此外，通常為1μm以上，較佳為5μm以上，再更佳為15μm以上。熱塑性樹脂膜可具或不具相位差。 The thickness of the thermoplastic resin film may be, for example, 30 μm or less, preferably 25 μm or less from the viewpoint of thinning, and usually 1 μm or more, preferably 5 μm or more, and more preferably 5 μm or more. 15 μm or more. The thermoplastic resin film may or may not have a retardation.

熱塑性樹脂膜可於至少一表面具有硬塗層、抗反射層或抗靜電層。硬塗層、抗反射層及抗靜電層可僅形成於基材之未形成上述硬化物之側的表面、或僅形成於基材之形成有上述硬化物之側的表面。 The thermoplastic resin film may have a hard coat layer, an antireflection layer or an antistatic layer on at least one surface. The hard coat layer, antireflective layer, and antistatic layer may be formed only on the surface of the base material on which the above-mentioned hardened product is not formed, or only on the surface of the base material on the side where the above-mentioned hardened product is formed.

熱塑性樹脂膜之透濕度並無特別限定，惟可為例如1500[g/m2/24hr]以下，較佳為1000[g/m2/24hr]以下，更佳為850[g/m2/24hr]以下，可為500[g/m2/24hr]以下。此外，熱塑性樹脂膜之透濕度可為10[g/m2/24hr]以上，也可為100[g/m2/24hr]以上或300[g/m2/24hr]以上。本發明藉由使玻璃板1及偏光片3均直接地接觸第1貼合層2而積層，而即使在熱塑性樹脂膜之透濕度高的情況下，亦可達成耐熱試驗後之偏光度的降低之抑制。 The moisture permeability of the thermoplastic resin film is not particularly limited, but may be, for example, 1500 [g/m 2 /24hr] or less, preferably 1000 [g/m 2 /24hr] or less, more preferably 850 [g/m 2 /24hr] 24hr] or less, may be 500 [g/m 2 /24hr] or less. In addition, the moisture permeability of the thermoplastic resin film may be 10 [g/m 2 /24hr] or more, 100 [g/m 2 /24hr] or 300 [g/m 2 /24hr] or more. In the present invention, both the glass plate 1 and the polarizer 3 are laminated in direct contact with the first bonding layer 2, and even when the moisture permeability of the thermoplastic resin film is high, the degree of polarization after the heat resistance test can be reduced. suppression.

[相位差層] [Retardation layer]

相位差層可經介後述貼合層而積層於積層體10之偏光片3側或上述熱塑性樹脂膜側。 The retardation layer can be laminated on the side of the polarizer 3 of the laminate 10 or the side of the above-mentioned thermoplastic resin film via an adhesive layer described later.

相位差層可為：對透射光賦予1/4波長份之相位差的λ/4相位差層、對透射光賦予1/2波長份之相位差的λ/2相位差層、正A板、及正C板。相位差層可從液晶硬化層形成，亦可從作為上述熱塑性樹脂膜之材料所例示的樹脂膜形成。在相位差層包含液晶硬化層之情況下，相位差層可更包含後述接著劑層或配向層、基材。 The phase difference layer can be: a λ/4 phase difference layer that imparts a phase difference of 1/4 wavelength to the transmitted light, a λ/2 phase difference layer that imparts a phase difference of 1/2 wavelength to the transmitted light, a positive A plate, And positive C board. The retardation layer may be formed from a liquid crystal cured layer, or may be formed from the resin film exemplified as the material of the above-mentioned thermoplastic resin film. When the retardation layer includes a liquid crystal cured layer, the retardation layer may further include an adhesive layer, an alignment layer, and a base material to be described later.

相位差層較佳係包含λ/4層，更佳係包含λ/4層與λ/2層及正C層之至少一者。在相位差層包含λ/2層之情況下，可從偏光片3側依序積層λ/2 層及λ/4層。在相位差層包含正C層之情況下，可從偏光片3側依序積層λ/4層及正C層，亦可從偏光片3側依序積層正C層及λ/4層。 The retardation layer preferably includes a λ/4 layer, and more preferably includes at least one of the λ/4 layer, the λ/2 layer, and the positive C layer. In the case where the retardation layer includes a λ/2 layer, λ/2 layers can be stacked sequentially from the polarizer 3 side layer and λ/4 layer. When the retardation layer includes a positive C layer, the λ/4 layer and the positive C layer may be laminated sequentially from the polarizer 3 side, or the positive C layer and λ/4 layer may be laminated sequentially from the polarizer 3 side.

用於液晶硬化層之形成的聚合性液晶化合物可列舉：液晶手冊(液晶手冊編輯委員會編、丸善(股)平成12年10月30日發行)之「3.8.6網絡(完全交聯型)」、「6.5.1液晶材料b.聚合性向列液晶材料」所記載的化合物中具有聚合性基的化合物，以及日本特開2010-31223號公報、日本特開2010-270108號公報、日本特開2011-6360號公報、日本特開2011-207765號公報、日本特開2011-162678號公報、日本特開2016-81035號公報、國際公開第2017/043438號及日本特表2011-207765號公報所記載的聚合性液晶化合物等。 Examples of polymerizable liquid crystal compounds used in the formation of the liquid crystal cured layer include: "3.8.6 Network (Completely Crosslinked Type)" in Liquid Crystal Handbook (Edited by the Liquid Crystal Handbook Editorial Committee, Maruzen Co., Ltd., October 30, 2012) , "6.5.1 Liquid crystal material b. Polymerizable nematic liquid crystal material", a compound having a polymerizable group among the compounds described in "6.5.1 Liquid Crystal Material b. -Recorded in Gazette No. 6360, JP 2011-207765 Gazette, JP 2011-162678 Gazette, JP 2016-81035 Gazette, International Publication No. 2017/043438 and JP 2011-207765 Gazette polymerizable liquid crystal compounds, etc.

從聚合性液晶化合物之在配向狀態之聚合物製造相位差層的方法可列舉例如：日本特開2010-31223號公報所記載的方法等。 As a method of producing a retardation layer from a polymer in an aligned state of a polymerizable liquid crystal compound, for example, the method described in JP 2010-31223 A may be mentioned.

屬於使聚合性液晶化合物硬化而成的液晶硬化層之相位差層之厚度，例如為0.1μm以上10μm以下，較佳為0.5μm以上8μm以下，更佳為1μm以上6μm以下。 The thickness of the phase difference layer belonging to the liquid crystal cured layer formed by curing a polymerizable liquid crystal compound is, for example, 0.1 μm to 10 μm , preferably 0.5 μm to 8 μm , more preferably 1 μm or more 6 μm or less.

本發明之積層體可作為具有λ/4相位差層之圓偏光板而構成。圓偏光板可作為抗反射用偏光板使用。 The laminate of the present invention can be constituted as a circular polarizing plate having a λ/4 retardation layer. Circular polarizers can be used as anti-reflection polarizers.

[黏著層] [adhesive layer]

積層體10可在最外面配置有黏著層。黏著層可為用於在積層體10貼合相位差層或圖像顯示元件等顯示模組之層。黏著層通常係由黏著劑(pressure-sensitive adhesive)所構成。作為黏著劑，可使用以往習知的黏著劑而無特別限制，可使用具有丙烯酸系聚合物、胺甲酸酯系聚合物、聚矽氧系聚合物、聚乙烯醚系聚合物等基底聚合物的黏著劑。此外，可為活性能量線硬化型黏著劑、熱硬化型 黏著劑等。黏著層具有隔片(separator)。在將相位差層或圖像顯示元件等顯示模組貼合於積層體10之際，剝離除去隔片。 The laminated body 10 may be provided with an adhesive layer on the outermost surface. The adhesive layer may be a layer for bonding display modules such as a retardation layer or an image display element to the laminate 10 . The adhesive layer is usually composed of pressure-sensitive adhesive. As the adhesive, conventionally known adhesives can be used without particular limitation, and base polymers such as acrylic polymers, urethane polymers, polysiloxane polymers, and polyvinyl ether polymers can be used. of adhesives. In addition, active energy ray-curable adhesives, heat-curable Adhesives etc. The adhesive layer has a separator. When bonding a display module such as a retardation layer or an image display element to the laminate 10, the spacer is peeled off and removed.

[表面保護膜(防護膜)] [surface protective film (protective film)]

表面保護膜(防護膜)係用於保護玻璃板1之表面免受擦傷等的膜，並可配置於積層體10之玻璃板1側。積層體10可包含用於保護玻璃板1及其表面、典型而言用於保護玻璃板1之表面的表面保護膜。關於表面保護膜，例如，在圖像顯示元件或其他光學構件貼合積層體10後，在此具有黏著劑層之情況下，則與其黏著劑層一起剝離除去。表面保護膜對於玻璃板1的密著力通常為0.01N/25mm至1N/25mm。 The surface protection film (protective film) is a film for protecting the surface of the glass plate 1 from scratches, etc., and can be arranged on the glass plate 1 side of the laminated body 10 . The laminate 10 may include a surface protection film for protecting the glass plate 1 and its surface, typically for protecting the surface of the glass plate 1 . Regarding the surface protection film, for example, after the laminated body 10 is bonded to an image display element or another optical member, if there is an adhesive layer, it is peeled off together with the adhesive layer. The adhesion of the surface protection film to the glass plate 1 is usually 0.01N/25mm to 1N/25mm.

表面保護膜係由例如基材膜與積層在基材膜上之黏著劑層所構成。針對黏著劑層係適用針對上述貼合層所說明者。構成基材膜之樹脂可為例如：聚乙烯等聚乙烯系樹脂、聚丙烯等聚丙烯系樹脂、聚對酞酸乙二酯或聚萘二甲酸乙二酯等聚酯系樹脂、聚碳酸酯系樹脂等熱塑性樹脂。較佳為聚對酞酸乙二酯等聚酯系樹脂。表面保護膜可為由自黏著性之樹脂所構成之單層膜。 The surface protection film is composed of, for example, a base film and an adhesive layer laminated on the base film. For the adhesive layer system, what has been described for the above-mentioned bonding layer applies. The resin constituting the base film can be, for example, polyethylene-based resins such as polyethylene, polypropylene-based resins such as polypropylene, polyester-based resins such as polyethylene terephthalate or polyethylene naphthalate, polycarbonate, etc. Thermoplastic resins such as resins. Polyester-based resins such as polyethylene terephthalate are preferable. The surface protection film can be a single-layer film made of self-adhesive resin.

表面保護膜之厚度並無特別限定，惟例如，較佳係設為20μm以上200μm以下之範圍。基材膜之厚度若為20μm以上，則有著易於賦予積層體10強度的傾向。 The thickness of the surface protection film is not particularly limited, but for example, it is preferably in the range of 20 μm or more and 200 μm or less. When the thickness of the base film is 20 μm or more, it tends to be easy to impart strength to the laminate 10.

[積層體之層構成] [Layer composition of laminated body]

針對積層體之另一層構成，參照圖2的同時進行說明。圖2所示之積層體20具備：玻璃板1、第1貼合層2、偏光片3、第2貼合層4、及熱塑性樹脂膜5。 Another layer configuration of the laminate will be described with reference to FIG. 2 . A laminate 20 shown in FIG. 2 includes a glass plate 1 , a first bonding layer 2 , a polarizer 3 , a second bonding layer 4 , and a thermoplastic resin film 5 .

針對積層體之又另一層構成，參照圖3的同時進行說明。圖3所示之積層體30具備：表面保護膜6、玻璃板1、第1貼合層2、偏光片3、第2貼合層4、及熱塑性樹脂膜5。 Still another layer configuration of the laminate will be described with reference to FIG. 3 . A laminate 30 shown in FIG. 3 includes a surface protection film 6 , a glass plate 1 , a first bonding layer 2 , a polarizer 3 , a second bonding layer 4 , and a thermoplastic resin film 5 .

[積層體之製造方法] [Manufacturing method of laminated body]

關於積層體10，例如，可藉由包含以下步驟之製造方法而製造。 The laminated body 10 can be manufactured, for example, by a manufacturing method including the following steps.

在玻璃板或偏光片之貼合面之任一面或其雙面，施用會構成第1貼合層之活性能量線硬化性組成物或感壓接著劑組成物，並使玻璃板及偏光片貼合的步驟。 Apply an active energy ray curable composition or a pressure-sensitive adhesive composition that will constitute the first bonding layer on either or both sides of the bonding surface of the glass plate or polarizer, and bond the glass plate and polarizer combined steps.

在從活性能量線硬化性組成物形成第1貼合層之情況下，可在使玻璃板及偏光片貼合後照射活性能量線，並使活性能量線硬化性組成物硬化。用於使活性能量線硬化性組成物硬化之活性能量線，可從玻璃板及偏光片之任一者或兩者之側進行照射。活性能量之照射量，例如可為100mJ以上1500mJ以下，就耐熱試驗後之偏光度之變化量的抑制之觀點而言，較佳為100mJ以上1200mJ以下，更佳為100mJ以上400mJ以下。 When forming the first bonding layer from an active energy ray-curable composition, the active energy ray-curable composition may be cured by irradiating the active energy ray after bonding the glass plate and the polarizer. The active energy rays for curing the active energy ray-curable composition may be irradiated from either or both sides of the glass plate and the polarizer. The irradiation amount of active energy may be, for example, 100 mJ to 1500 mJ, and from the viewpoint of suppressing the change in polarization degree after the heat resistance test, it is preferably 100 mJ to 1200 mJ, more preferably 100 mJ to 400 mJ.

如積層體20般，在偏光片之與第1貼合層為相反側依序積層有第2貼合層、熱塑性樹脂膜之情況下，積層體可藉由包含以下步驟之製造方法而製造。 Like the laminate 20, when the second bonding layer and the thermoplastic resin film are sequentially laminated on the opposite side of the polarizer to the first bonding layer, the laminate can be manufactured by a manufacturing method including the following steps.

在偏光片或熱塑性樹脂膜之至少任一者的貼合面塗佈水系接著劑組成物之步驟； A step of coating a water-based adhesive composition on at least one of the bonding surface of the polarizer or the thermoplastic resin film;

使偏光片及熱塑性樹脂膜經介水系接著劑組成物而貼合之步驟； The step of laminating the polarizer and the thermoplastic resin film through a water-based adhesive composition;

藉由加熱水系接著劑組成物使其硬化而形成包含水系接著劑組成物之硬化物的第2貼合層之步驟； A step of forming a second bonding layer comprising a cured product of the water-based adhesive composition by heating the water-based adhesive composition to harden it;

在偏光片之與第2貼合層為相反側經介第1貼合層貼合玻璃板之步驟。 The step of bonding the glass plate through the first bonding layer on the opposite side of the polarizer to the second bonding layer.

在從活性能量線硬化性組成物形成第1貼合層之情況下，可在使玻璃板及偏光片貼合後照射活性能量線，而使活性能量線硬化性組成物硬化。用於使活性能量線硬化性組成物硬化的活性能量線，可從玻璃板及偏光片之任一者或兩者之側進行照射。活性能量之照射量，例如可為100mJ以上1500mJ以下，就耐熱試驗後之偏光度之變化量的抑制之觀點而言，較佳為100mJ以上1200mJ以下，更佳為100mJ以上400mJ以下。 When forming the first bonding layer from an active energy ray-curable composition, the active energy ray-curable composition can be cured by irradiating the active energy ray after bonding the glass plate and the polarizer. The active energy ray for curing the active energy ray curable composition may be irradiated from either or both sides of the glass plate and the polarizer. The irradiation amount of active energy may be, for example, 100 mJ to 1500 mJ, and from the viewpoint of suppressing the change in polarization degree after the heat resistance test, it is preferably 100 mJ to 1200 mJ, more preferably 100 mJ to 400 mJ.

在貼合面之任一面或其雙面，可進行電暈處理、電漿處理等，亦可形成底漆層。水系接著劑組成物及活性能量線硬化性組成物之塗佈中，可利用例如刮刀、線棒、模具塗佈器、逗號塗佈器(comma coater)、凹版塗佈器等各種塗佈方式。 Corona treatment, plasma treatment, etc. can be performed on either side or both sides of the bonding surface, and a primer layer can also be formed. Various coating methods such as a doctor blade, a wire bar, a die coater, a comma coater, and a gravure coater can be used for coating the water-based adhesive composition and the active energy ray-curable composition.

在從感壓接著劑組成物形成第1貼合層2之情況下，能以黏著片之形式準備第1貼合層2。關於黏著片，例如，可藉由在甲苯或乙酸乙酯等有機溶劑中使感壓接著劑組成物溶解或分散以調製感壓接著劑液，將此感壓接著劑液在已實施離型處理後的剝離膜上形成片狀的感壓接著劑層，並在此感壓接著劑層上更貼合另一剝離膜的方式等而製作。可藉由將剝離其中一剝離膜後的黏著片貼合於一層，其次，剝離另一剝離膜並貼合另一層之方法而貼合各層。 When the first bonding layer 2 is formed from a pressure-sensitive adhesive composition, the first bonding layer 2 can be prepared as an adhesive sheet. For an adhesive sheet, for example, a pressure-sensitive adhesive solution can be prepared by dissolving or dispersing a pressure-sensitive adhesive composition in an organic solvent such as toluene or ethyl acetate, and the pressure-sensitive adhesive solution can be prepared after a release treatment has been performed. A sheet-shaped pressure-sensitive adhesive layer is formed on the final release film, and another release film is attached to the pressure-sensitive adhesive layer. Each layer can be attached by a method of attaching an adhesive sheet after peeling off one of the peeling films to one layer, and then peeling off the other peeling film and attaching the other layer.

將感壓接著劑液塗佈於剝離膜上的方法，可採用使用了模具塗佈器、逗號塗佈器、反向輥式塗佈器、凹版塗佈器、棒塗佈器、線棒塗佈器、刮刀塗佈器、氣動刮刀塗佈器等的通常的塗佈技術。 The method of coating the pressure-sensitive adhesive liquid on the release film can use a die coater, a comma coater, a reverse roll coater, a gravure coater, a bar coater, or a wire bar coater. Common coating techniques such as cloth cloth, knife coater, pneumatic knife coater, etc.

剝離膜較佳係由塑料膜與剝離層所構成。塑料膜可列舉：聚對酞酸乙二酯膜、聚對酞酸丁二酯膜、及聚萘二甲酸乙二酯膜等聚酯膜，以及聚丙烯 膜等聚烯烴膜。此外，剝離層，例如，可從剝離層形成用組成物而形成。構成剝離層形成用組成物之主要成分(樹脂)並無特別限定，惟可列舉：聚矽氧樹脂、醇酸樹脂、丙烯酸樹脂、及長鏈烷基樹脂等。 The release film is preferably composed of a plastic film and a release layer. Examples of plastic films include polyester films such as polyethylene terephthalate films, polybutylene terephthalate films, and polyethylene naphthalate films, and polypropylene films. film and other polyolefin films. In addition, the release layer can be formed, for example, from a composition for forming a release layer. The main component (resin) constituting the composition for peeling layer formation is not particularly limited, but examples thereof include silicone resins, alkyd resins, acrylic resins, and long-chain alkyl resins.

在第1貼合層2包含活性能量線硬化性組成物的硬化物之情況下，第1貼合層2可藉由使用習知的塗佈技術將活性能量線硬化性組成物塗佈於貼合面而形成。 In the case where the first bonding layer 2 contains a cured product of the active energy ray-curable composition, the first bonding layer 2 can be coated with the active energy ray-curable composition on the pasting layer 2 using a known coating technique. Formed together.

第1貼合層2之厚度可藉由各別活性能量線硬化性組成物、感壓接著劑液之塗佈條件而調整。為了使第1貼合層之厚度變薄，減小塗佈厚度乃屬有效者。 The thickness of the first bonding layer 2 can be adjusted according to the coating conditions of the active energy ray curable composition and the pressure-sensitive adhesive liquid. In order to reduce the thickness of the first bonding layer, it is effective to reduce the coating thickness.

<圖像顯示裝置> <Image display device>

本發明之圖像顯示裝置包含上述積層體。圖像顯示裝置並無特別限定，可列舉例如：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。圖像顯示裝置可具有觸控機能。上述積層體可為可撓式光學積層體。可撓式光學積層體適合用於能夠彎曲或彎折等具有可撓性的圖像顯示裝置。圖像顯示裝置中，積層體係將玻璃板1側朝向外側而配置於圖像顯示裝置的視認側。 An image display device of the present invention includes the above-mentioned laminate. The image 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 image display device may have a touch function. The above-mentioned laminate may be a flexible optical laminate. The flexible optical layered body is suitable for use in a flexible image display device such as being able to bend or bend. In the image display device, the laminated system is disposed on the viewing side of the image display device with the glass plate 1 facing outward.

本發明之圖像顯示裝置可使用來作為智慧型手機、平板電腦等行動裝置、電視、數位相框、電子標牌、測量儀器及儀表類、辦公設備、醫療設備、計算機設備等。本發明之圖像顯示裝置，由於具有優異的可撓性，故適合用於可撓式顯示器等。 The image display device of the present invention can be used as mobile devices such as smart phones and tablet computers, televisions, digital photo frames, electronic signs, measuring instruments and meters, office equipment, medical equipment, computer equipment, etc. Since the image display device of the present invention has excellent flexibility, it is suitable for use in flexible displays and the like.

圖4所示之圖像顯示裝置40中，經介黏著層7而積層有積層體20與圖像顯示元件8。圖像顯示元件8可列舉例如：液晶單元、有機電致發光 (有機EL)顯示元件、無機電致發光(無機EL)顯示元件、電漿顯示元件、電場發射型顯示元件等。 In an image display device 40 shown in FIG. 4 , a laminate 20 and an image display element 8 are laminated via an adhesive layer 7 . The image display element 8 can include, for example: a liquid crystal cell, an organic electroluminescent (Organic EL) display elements, inorganic electroluminescence (inorganic EL) display elements, plasma display elements, electric field emission type display elements, etc.

[實施例] [Example]

以下藉由實施例更詳細地說明本發明。關於例中之「%」及「份」，除非另有說明，否則為質量%及質量份。 The present invention is described in more detail below by means of examples. "%" and "parts" in the examples are % by mass and parts by mass unless otherwise specified.

[耐熱試驗後之偏光度的變化量] [Change in polarization degree after heat resistance test]

使用紫外可見近紅外分光光度計(V7100，日本分光股份有限公司製)測定評估樣品的偏光度。其後，在耐熱試驗機中之溫度95℃的環境下，放置48小時後，同樣地測定偏光度。 The degree of polarization of the evaluation sample was measured using an ultraviolet-visible-near-infrared spectrophotometer (V7100, manufactured by JASCO Corporation). Thereafter, the degree of polarization was measured in the same manner after being left to stand for 48 hours in an environment at a temperature of 95° C. in a heat-resistant tester.

(製造例1：偏光片1之製作) (Manufacturing Example 1: Production of Polarizer 1)

使用熱輥延伸裝置以縱向單軸延伸的方式連續地進行熱輥延伸，從作為原料膜之長條PVA系樹脂膜(厚度：20μm，皂化度：99.3莫耳%以上)製作長條延伸膜。熱輥延伸中，將熱輥之表面溫度設為123℃，使熱輥之周速較第1挾持輥之周速大，藉由該周速差，賦予張力(拉張力)而延伸。PVA系樹脂膜在導入熱輥延伸裝置前，藉由通過加濕爐進行加濕後提供至熱輥延伸。 Heat roll stretching is continuously performed in a longitudinal uniaxial stretching manner using a heat roll stretching device, and a long stretch is produced from a long PVA-based resin film (thickness: 20 μm , saponification degree: 99.3 mol% or more) as a raw material film. membrane. In hot roll stretching, the surface temperature of the hot roll was set at 123° C., the peripheral speed of the hot roll was higher than that of the first nip roll, and tension (tension) was applied by the difference in peripheral speed to stretch. The PVA-based resin film is supplied to the hot roll stretching after being humidified by a humidifying furnace before being introduced into the hot roll stretching device.

將所製作的延伸膜在保持緊繃狀態下，在溫度30℃之純水浸漬50秒鐘(膨潤步驟)後，將其浸漬於以質量比計為碘化鉀/水=5.4/100之含碘的溫度28℃之染色液37秒鐘(染色步驟)。將染色步驟中經處理的延伸膜浸漬於以質量比計為碘化鉀/硼酸/水=15/5.5/100的溫度65℃之交聯液143秒鐘(交聯步驟)後，以溫度5℃之純水洗滌2秒鐘後，將延伸膜在保持於緊繃狀態下，在將噴吹熱風溫度從40℃提升至85℃的同時進行乾燥47秒鐘，並獲得在PVA系樹脂膜吸附配向 有碘之偏光片(膜厚：7.2μm)。以作為原料膜之PVA系樹脂膜作為基準的偏光片之總累積延伸倍率：4.5倍。 Keeping the stretched film in a tight state, immerse it in pure water at a temperature of 30°C for 50 seconds (swelling step), and then immerse it in iodine-containing iodine with a mass ratio of potassium iodide/water=5.4/100. Dyeing solution at 28°C for 37 seconds (staining step). Immerse the stretched film treated in the dyeing step in the cross-linking solution at a temperature of 65°C at a mass ratio of potassium iodide/boric acid/water=15/5.5/100 for 143 seconds (cross-linking step), and then at a temperature of 5°C After washing with pure water for 2 seconds, the stretched film was kept in a tight state, and dried for 47 seconds while raising the temperature of the hot air from 40°C to 85°C, and obtained a positive effect on the adsorption and alignment of the PVA-based resin film. Iodine polarizer (film thickness: 7.2 μm ). The total cumulative elongation ratio of the polarizer based on the PVA-based resin film as the raw material film: 4.5 times.

(製造例2：偏光片2之製作) (Manufacturing Example 2: Production of Polarizer 2)

將皂化度99.9%以上之透明的厚度60μm之未延伸聚乙烯醇膜(PE-6000，Kuraray公司製)浸漬於29℃之水(去離子水)90秒鐘並使其膨潤後，浸漬於包含碘0.6mmol/L、碘化鉀1.6質量份、及硼酸0.3質量份之30℃的染色液2分鐘，藉此而進行染色。此時，在膨潤及染色階段中，各別以1.72倍、1.54倍之延伸比進行延伸，並以直到染色槽為止之累積延伸比成為2.64倍的方式進行延伸。繼而，以包含碘化鉀8質量份、硼酸4質量份之溶液為52℃之交聯液浸漬54秒鐘(交聯階段)並使其交聯的同時，以2.1倍之延伸比進行延伸。更且，在包含碘化鉀9.5質量份、及硼酸3.8質量份之45℃的交聯液浸漬13秒鐘(補色階段)使其交聯的同時進行延伸處理。此時，以膨潤、染色、及交聯、補色階段之總累積延伸比成為5.64倍的方式而進行。交聯結束後，在將噴吹熱風溫度從65℃提升至90℃的同時將聚乙烯醇膜乾燥93秒以製造偏光片。偏光片之厚度為23.0μm。 A transparent unstretched polyvinyl alcohol film (PE-6000, manufactured by Kuraray Co., Ltd.) with a saponification degree of 99.9% or higher and a thickness of 60 μm was immersed in water (deionized water) at 29°C for 90 seconds to swell, and then dipped in Staining was carried out in a 30° C. staining solution containing 0.6 mmol/L of iodine, 1.6 parts by mass of potassium iodide, and 0.3 parts by mass of boric acid for 2 minutes. At this time, in the swelling and dyeing stages, stretching was performed at stretching ratios of 1.72 times and 1.54 times, respectively, and stretching was performed so that the cumulative stretching ratio up to the dyeing tank became 2.64 times. Next, while immersing in a cross-linking solution at 52° C. for 54 seconds (cross-linking stage) in a solution containing 8 parts by mass of potassium iodide and 4 parts by mass of boric acid, it was stretched at a stretch ratio of 2.1 times. Furthermore, stretching treatment was performed while immersing in a 45° C. crosslinking solution containing 9.5 parts by mass of potassium iodide and 3.8 parts by mass of boric acid for 13 seconds (color correction stage) to crosslink. At this time, it was performed so that the total cumulative elongation ratio of swelling, dyeing, crosslinking, and complementary color stages would become 5.64 times. After the cross-linking was completed, the polyvinyl alcohol film was dried for 93 seconds while raising the temperature of the blown hot air from 65° C. to 90° C. to manufacture a polarizer. The thickness of the polarizer is 23.0 μm .

(製造例3：活性能量線硬化性組成物1之調製) (Production Example 3: Preparation of Active Energy Ray Curable Composition 1)

將3,4-環氧基環己烷羧酸3’,4’-環氧基環己基甲酯(Daicel股份有限公司製之商品名「CELLOXIDE 2021P」)70份、新戊二醇二縮水甘油醚(Nagase ChemteX(股)製，商品名「EX-211L」)20份、2-乙基己基縮水甘油醚10份、光聚合起始劑(SAN-APRO股份有限公司製之商品名「CPI-100P」)之固體成分2.25份混合，消泡而調製。 70 parts of 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (trade name "CELLOXIDE 2021P" manufactured by Daicel Co., Ltd.), neopentyl glycol diglycidyl 20 parts of ether (manufactured by Nagase ChemteX Co., Ltd., trade name "EX-211L"), 10 parts of 2-ethylhexyl glycidyl ether, photopolymerization initiator (trade name "CPI- 2.25 parts of the solid content of 100P") were mixed and prepared by defoaming.

(製造例4：活性能量線硬化性組成物2之調製) (Production Example 4: Preparation of Active Energy Ray Curable Composition 2)

將3,4-環氧基環己烷羧酸3’,4’-環氧基環己基甲酯(Daicel股份有限公司製之商品名「CELLOXIDE 2021P」)20份、新戊二醇二縮水甘油醚(Nagase ChemteX(股)製，商品名「EX-211L」)70份、4-羥基丁基乙烯基醚(日本CARBIDE製，商品名「HBVE」)2份、甲基丙烯酸甲酯-甲基丙烯酸縮水甘油醚共聚物(陽離子聚合性聚合物)(日油製，商品名「MARPROOF G-01100」)8份、光聚合起始劑(SAN-APRO股份有限公司製之商品名「CPI-100P」)之固體成分2.25份混合，消泡而調製。 20 parts of 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (trade name "CELLOXIDE 2021P" manufactured by Daicel Co., Ltd.), neopentyl glycol diglycidyl Ether (manufactured by Nagase ChemteX Co., Ltd., trade name "EX-211L") 70 parts, 4-hydroxybutyl vinyl ether (manufactured by Nippon CARBIDE, trade name "HBVE") 2 parts, methyl methacrylate-methyl Acrylic glycidyl ether copolymer (cationically polymerizable polymer) (manufactured by NOF, trade name "MARPROOF G-01100") 8 parts, photopolymerization initiator (manufactured by San-Apro Co., Ltd., trade name "CPI-100P") ") solid content of 2.25 parts were mixed, defoamed and prepared.

(製造例5：水系接著劑之調製) (Manufacturing example 5: Preparation of water-based adhesive)

相對於水100份，使GOHSEFIMER Z-200(三菱化學股份有限公司)製)3.5份、氯化鋅0.09份、硝酸鋅0.35份、乙二醛0.7份溶解，而調製聚乙烯醇系樹脂接著劑。 Prepare a polyvinyl alcohol-based resin adhesive by dissolving 3.5 parts of GOHSEFIMER Z-200 (manufactured by Mitsubishi Chemical Corporation), 0.09 parts of zinc chloride, 0.35 parts of zinc nitrate, and 0.7 parts of glyoxal in 100 parts of water. .

〔附表面保護膜之薄型玻璃的調製〕 [Preparation of thin glass with surface protection film]

將玻璃板(SCHOTT公司製「AS87-eco」(商品名)，厚度100μm)進行蝕刻處理後，實施化學強化處理，以製作厚度50μm之玻璃板。在該玻璃板單面，貼附表面保護膜而獲得附表面保護膜的薄型玻璃。 A glass plate ("AS87-eco" (trade name) manufactured by SCHOTT Co., Ltd., thickness 100 μm ) was etched, and then chemically strengthened to produce a glass plate with a thickness of 50 μm . On one side of the glass plate, a surface protective film was attached to obtain a thin glass with a surface protective film.

<實施例1> <Example 1>

在已利用恆溫恆濕槽(溫度25℃相對濕度55%)將水分率調節成9.50%的偏光片1之單面，實施電暈處理(800W、10m/分鐘、棒寬700mm、1Pass)。 Corona treatment (800W, 10m/min, rod width 700mm, 1Pass) was performed on one side of the polarizer 1 whose moisture content was adjusted to 9.50% by using a constant temperature and humidity chamber (temperature 25°C, relative humidity 55%).

在三乙醯纖維素(TAC)膜(厚度40μm/透濕度：799〔g/m2‧24h〕)之單面實施電暈處理。在偏光片1之電暈處理面，將水系接著劑以乾燥後膜厚成為100nm的方式塗佈，貼合三乙醯纖維素(TAC)膜之電暈處理面，在80℃、120秒鐘使其乾燥而貼合，藉此獲得附TAC膜的偏光片。 Corona treatment was performed on one side of a triacetyl cellulose (TAC) film (thickness: 40 μm /moisture permeability: 799 [g/m 2 ‧24h]). On the corona-treated surface of the polarizer 1, apply a water-based adhesive so that the film thickness becomes 100nm after drying, and stick the corona-treated surface of the triacetyl cellulose (TAC) film, at 80°C for 120 seconds By drying and bonding, a polarizer with a TAC film was obtained.

在上述獲得的附TAC膜的偏光片之與TAC膜為相反側，亦即，在偏光片1側實施電暈處理。 Corona treatment was performed on the side opposite to the TAC film of the polarizer with a TAC film obtained above, that is, on the side of the polarizer 1 .

在上述獲得的附表面保護膜之薄型的玻璃面實施電暈處理。在偏光片1之電暈處理面，將活性能量線硬化性組成物1以硬化後厚度成為3μm的方式塗佈，貼合附表面保護膜之薄型玻璃的玻璃面，從TAC膜側照射紫外線並使活性能量線硬化性組成物硬化，以獲得實施例1的積層體。針對積層體求出耐熱試驗後之偏光度的變化量。將結果示於表1。 Corona treatment was performed on the thin glass surface with the surface protection film obtained above. On the corona-treated surface of the polarizer 1, apply the active energy ray-curable composition 1 so that the thickness after curing becomes 3 μm , attach the glass surface of thin glass with a surface protection film, and irradiate from the TAC film side The active energy ray curable composition was cured by ultraviolet rays to obtain the laminate of Example 1. The amount of change in the degree of polarization after the heat resistance test was calculated for the laminate. The results are shown in Table 1.

<實施例2> <Example 2>

除了使用在溫度25℃相對濕度95%之環境下水分率經調節成9.98%的偏光片1取代實施例1中使用的水分率經調節成9.50%的偏光片1以外，與實施例1同樣地進行以獲得實施例2的積層體。將結果示於表1。 In the same manner as in Example 1, except that the polarizer 1 with a moisture content adjusted to 9.98% in an environment with a temperature of 25°C and a relative humidity of 95% was used instead of the polarizer 1 used in Example 1 with a moisture content adjusted to 9.50%. This was carried out to obtain a laminate of Example 2. The results are shown in Table 1.

<實施例3> <Example 3>

除了使用在溫度25℃相對濕度0%之環境下水分率經調節成7.35%的偏光片1取代實施例1中使用的水分率經調節成9.50%的偏光片1以外，與實施例1同樣地進行以獲得實施例3的積層體。將結果示於表1。 In the same manner as in Example 1, except that the polarizer 1 with a moisture content adjusted to 7.35% in an environment with a temperature of 25°C and a relative humidity of 0% was used instead of the polarizer 1 used in Example 1 with a moisture content adjusted to 9.50%. This was carried out to obtain a laminate of Example 3. The results are shown in Table 1.

<實施例4> <Example 4>

除了使用活性能量線硬化性組成物2取代實施例1中使用的活性能量線硬化性組成物1以外，與實施例1同樣地進行以獲得實施例4的積層體。將結果示於表1。 A laminate of Example 4 was obtained in the same manner as in Example 1, except that the active energy ray-curable composition 2 was used instead of the active energy ray-curable composition 1 used in Example 1. The results are shown in Table 1.

<實施例5> <Example 5>

與實施例1同樣地進行以製作附TAC膜的偏光片。在偏光片1之與TAC膜為相反側實施電暈處理。同樣地在玻璃板實施電暈處理。在偏光片1之電暈處理 面，將丙烯酸系感壓接著劑片之一面的隔片剝離除去，並貼合所露出的丙烯酸系感壓接著劑(厚度5μm)，將另一面的隔片剝離除去，並在所露出的感壓接著劑層貼合附表面保護膜之薄型玻璃的玻璃面，以獲得實施例5的積層體。針對積層體求出耐熱試驗後之偏光度的變化量。將結果示於表1。 A polarizer with a TAC film was produced in the same manner as in Example 1. Corona treatment was performed on the side of the polarizer 1 opposite to the TAC film. Corona treatment was similarly performed on the glass plate. On the corona-treated surface of the polarizer 1, the spacer on one side of the acrylic pressure-sensitive adhesive sheet was peeled off and removed, and the exposed acrylic pressure-sensitive adhesive (thickness 5 μm ) was bonded, and the spacer on the other side was bonded. The sheet was peeled off, and the exposed pressure-sensitive adhesive layer was bonded to the glass surface of the thin glass with a surface protection film to obtain the laminate of Example 5. The amount of change in the degree of polarization after the heat resistance test was calculated for the laminate. The results are shown in Table 1.

<實施例6> <Example 6>

除了使用偏光片2取代實施例1中使用的偏光片1以外，與實施例1同樣地進行以獲得實施例6的積層體。將結果示於表1。 Except having used the polarizer 2 instead of the polarizer 1 used in Example 1, it carried out similarly to Example 1, and obtained the laminated body of Example 6. The results are shown in Table 1.

<比較例1> <Comparative example 1>

與實施例1同樣地進行以製作附TAC膜的偏光片。在偏光片1之與TAC膜為相反側實施電暈處理。同樣地在另外所準備的TAC膜(厚度40μm)之一面實施電暈處理。在偏光片1之電暈處理面將水系接著劑以乾燥後厚度成為100nm的方式塗佈，將TAC膜之電暈處理面貼合，在80℃使其乾燥120秒鐘，以獲得比較例1的積層體。針對積層體求出耐熱試驗後之偏光度的變化量。將結果示於表1。 A polarizer with a TAC film was produced in the same manner as in Example 1. Corona treatment was performed on the side of the polarizer 1 opposite to the TAC film. Similarly, corona treatment was performed on one side of a separately prepared TAC film (thickness: 40 μm ). A water-based adhesive was applied to the corona-treated surface of the polarizer 1 so that the thickness after drying became 100 nm, and the corona-treated surface of the TAC film was bonded together, and dried at 80° C. for 120 seconds to obtain Comparative Example 1 layered body. The amount of change in the degree of polarization after the heat resistance test was calculated for the laminate. The results are shown in Table 1.

表1

Figure 111113058-A0202-12-0026-1
Table 1
Figure 111113058-A0202-12-0026-1

1:玻璃板 1: glass plate

2:第1貼合層 2: The first bonding layer

3:偏光片 3: Polarizer

10:積層體 10: laminated body

Claims (4)

一種積層體，係依序積層有玻璃板、第1貼合層及偏光片，其中， A laminated body, which is sequentially laminated with a glass plate, a first bonding layer and a polarizer, wherein, 前述玻璃板及前述偏光片均以與前述第1貼合層直接地接觸的方式積層， Both the glass plate and the polarizer are laminated so as to be in direct contact with the first bonding layer, 前述玻璃板之厚度係100μm以下， The thickness of the aforementioned glass plate is 100 μm or less, 前述第1貼合層之厚度係10μm以下， The thickness of the aforementioned first bonding layer is 10 μm or less, 前述第1貼合層包含活性能量線硬化性組成物之硬化物或感壓接著劑組成物， The first bonding layer includes a cured product of an active energy ray-curable composition or a pressure-sensitive adhesive composition, 在前述偏光片之與前述第1貼合層為相反側依序積層有第2貼合層及熱塑性樹脂膜。 A second bonding layer and a thermoplastic resin film are sequentially laminated on the side of the polarizer opposite to the first bonding layer. 如請求項1所述之積層體，其中，前述第2貼合層包含水系接著劑組成物的硬化物。 The laminate according to claim 1, wherein the second bonding layer includes a hardened water-based adhesive composition. 一種圖像顯示裝置，係包含請求項1或2所述之積層體。 An image display device comprising the laminate described in claim 1 or 2. 一種積層體之製造方法，係製造請求項2所述之積層體，該製造方法包含： A method for manufacturing a laminate is to manufacture the laminate described in Claim 2, the manufacturing method comprising: 在偏光片或熱塑性樹脂膜之至少任一者的貼合面塗佈水系接著劑組成物之步驟； A step of coating a water-based adhesive composition on at least one of the bonding surface of the polarizer or the thermoplastic resin film; 使前述偏光片及前述熱塑性樹脂膜經介前述水系接著劑組成物而貼合之步驟； a step of laminating the aforementioned polarizer and the aforementioned thermoplastic resin film through the aforementioned water-based adhesive composition; 藉由加熱使前述水系接著劑組成物硬化而形成包含前述水系接著劑組成物之硬化物的第2貼合層之步驟；以及 A step of forming a second bonding layer comprising a cured product of the water-based adhesive composition by heating the water-based adhesive composition to harden; and 在前述偏光片之與前述第2貼合層為相反側經介第1貼合層而貼合玻璃板之 步驟。 On the opposite side of the polarizer to the second bonding layer, the glass plate is bonded via the first bonding layer step.
TW111113058A 2021-04-09 2022-04-06 Laminate TW202307485A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2021066438 2021-04-09
JP2021-066438 2021-04-09
JP2021-121431 2021-07-26
JP2021121431 2021-07-26
JP2022032663 2022-03-03
JP2022-032663 2022-03-03
JP2022042656A JP2022161832A (en) 2021-04-09 2022-03-17 laminate
JP2022-042656 2022-03-17

Publications (1)

Publication Number Publication Date
TW202307485A true TW202307485A (en) 2023-02-16

Family

ID=83575185

Family Applications (1)

Application Number Title Priority Date Filing Date
TW111113058A TW202307485A (en) 2021-04-09 2022-04-06 Laminate

Country Status (3)

Country Link
KR (1) KR20220140426A (en)
CN (1) CN115195255A (en)
TW (1) TW202307485A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008166782A (en) 2006-12-26 2008-07-17 Seoul Semiconductor Co Ltd Light-emitting element

Also Published As

Publication number Publication date
CN115195255A (en) 2022-10-18
KR20220140426A (en) 2022-10-18

Similar Documents

Publication Publication Date Title
JP6893904B2 (en) Polarizer
CN108885298B (en) Optical film, peeling method, and method for manufacturing optical display panel
CN108431650B (en) Method for manufacturing optical film
KR20160076435A (en) Polarizing plate and fabrication method for the same, and polarizing plate set, liquid crystal panel, liquid crystal display device
TW202242458A (en) Method for manufacturing optical laminate
WO2013168722A1 (en) Polarizing plate
JP2018072533A (en) Polarizing plate set and liquid crystal panel
JP2018163374A (en) Polarizing plate set and liquid crystal panel
TW202307485A (en) Laminate
JP2022161832A (en) laminate
WO2020110538A1 (en) Polarizing plate
JP2020095247A (en) Polarizing plate
WO2021200364A1 (en) Multilayer body
WO2021200365A1 (en) Laminated body
KR102325624B1 (en) Polarizing Plate for OLED and Display Device Comprising the Same
WO2023189811A1 (en) Polarizing film, layered polarizing film, image display panel, and image display device
JP7297642B2 (en) POLARIZING PLATE COMPOSITION FOR PROTECTING POLARIZER AND PROTECTIVE LAYER MADE FROM THE COMPOSITION
US20220099875A1 (en) Polarizing plate for antireflection and display device comprising the same
WO2023054595A1 (en) Optical laminate, and image display device
WO2022270402A1 (en) Display device
KR20100046645A (en) Hard coating composition, hard coated polarizing film using the same and preparation method thereof
JP2021152642A (en) Optical laminate and display device
JP2022034558A (en) Anti-reflective polarizing plate and image display device having the same
KR20220064654A (en) Polarizing Plate and Display Device Comprising the Same
JP2022059255A (en) Flexible laminate