laminate

Abstract

The present application provides a laminate sequentially having a glass plate, a first adhesive layer, a polarizing plate, a second adhesive layer, and a thermoplastic resin film, and having a small change in degree of polarization even after a heat resistance test, an image display device including the laminate, and a method for manufacturing the laminate. A laminate in which a glass plate, a first adhesive layer, and a polarizing plate are sequentially laminated, the glass plate and the polarizing plate are each laminated in direct contact with the first adhesive layer, the thickness of the glass plate is 100 μm or less, the thickness of the first adhesive layer is 10 μm or less, the first adhesive layer contains a cured product of a active energy ray-curable composition or a pressure-sensitive adhesive composition, and a second adhesive layer and a thermoplastic resin film are sequentially laminated on the side of the polarizing plate opposite the first adhesive layer.

Description

Technical Field

[0001] This invention relates to laminates, and further to methods of manufacturing them. Background Technology

[0002] Polarizing plates are used as optical components in image display devices such as liquid crystal displays. Patent Document 1 discloses a polarizing plate comprising a polarizer, an adhesive layer, and a glass film. The glass film constituting this polarizing plate forms the viewing side surface on the display surface of the image display device.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2013 / 175767 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Polarizing plates, which include polarizers, adhesive layers, and glass films, exhibit significant changes in polarization degree after undergoing heat resistance tests.

[0008] The present invention provides a laminate having a glass plate, a first bonding layer and a polarizer in sequence, and having a small change in polarization degree after a heat resistance test, an image display device comprising the laminate, and a method for manufacturing the laminate.

[0009] Methods for solving problems

[0010] The present invention provides the following laminate, image display device and method for manufacturing laminate.

[0011] [1] A laminate, wherein a glass plate, a first bonding layer and a polarizer are sequentially laminated.

[0012] The thickness of the aforementioned glass plate is less than 100 μm.

[0013] The thickness of the first bonding layer is less than 10 μm.

[0014] The first bonding layer described above comprises a cured product of an active energy radiation curable composition or a pressure-sensitive adhesive composition.

[0015] [2] According to the laminate described in [1], a second bonding layer and a thermoplastic resin film are sequentially laminated on the side of the polarizer opposite to the first bonding layer.

[0016] [3] The laminate according to [2], wherein the second bonding layer comprises a cured aqueous adhesive composition.

[0017] [4] An image display device comprising any one of [1] to [3].

[0018] [5] A method for manufacturing a laminate, which is the method for manufacturing a laminate as described in [3], comprising: a step of coating a water-based adhesive composition on the bonding surface of at least one of a polarizing film or a thermoplastic resin film.

[0019] The process of bonding the polarizing film and the thermoplastic resin film together using the water-based adhesive composition.

[0020] The process of forming a second bonding layer comprising a cured product of the water-based adhesive composition by heating and curing the above-mentioned water-based adhesive composition.

[0021] The process of bonding a glass plate to the side of the polarizer opposite to the second bonding layer via the first bonding layer.

[0022] [6] A laminate, wherein a glass plate, a first bonding layer and a polarizer are sequentially laminated.

[0023] Both the glass plate and the polarizer are laminated in direct contact with the first bonding layer.

[0024] The thickness of the aforementioned glass plate is less than 100 μm.

[0025] The thickness of the first bonding layer is less than 10 μm.

[0026] The first bonding layer described above comprises a cured product of an active energy radiation-curable composition or a pressure-sensitive adhesive composition.

[0027] A second bonding layer and a thermoplastic resin film are sequentially stacked on the side of the polarizer opposite to the first bonding layer.

[0028] Invention Effects

[0029] According to the present invention, a laminate having a glass plate, a first bonding layer and a polarizer in sequence, wherein the reduction of polarization degree is suppressed after a heat resistance test, an image display device comprising the laminate, and a method for manufacturing the laminate can be provided. Attached Figure Description

[0030] Figure 1 A schematic top view illustrating one aspect of the stacked body of the present invention.

[0031] Figure 2 A schematic top view illustrating another aspect of the stacked body of the present invention.

[0032] Figure 3 A schematic top view illustrating another embodiment of the laminate of the present invention.

[0033] Figure 4 A schematic cross-sectional view illustrating the image display device of the present invention.

[0034] Explanation of reference numerals in the attached figures

[0035] 1. Glass plate, 2. First bonding layer, 3. Polarizing film, 4. Second bonding layer, 5. Thermoplastic resin film, 6. Surface protective film (protective film), 7. Adhesive layer, 8. Image display element, 10. 20. 30. Laminate, 40. Image display device Detailed Implementation

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments. In all the following drawings, the proportions of each component have been appropriately adjusted for ease of understanding, and the proportions of each component shown in the drawings may not be consistent with the actual proportions of the components.

[0037] <Layered Body>

[0038] In the laminate of the present invention, a glass plate, a first bonding layer and a polarizer are sequentially laminated. The thickness of the glass plate is less than 100 μm, the thickness of the first bonding layer is less than 10 μm, and the first bonding layer comprises a cured product of an active energy radiation curable composition or a pressure-sensitive adhesive composition.

[0039] For stacked bodies, refer to Figure 1 Please provide an explanation. Figure 1 In the laminate 10 shown, a glass plate 1, a first bonding layer 2, and a polarizer 3 are sequentially stacked. Figure 1 As shown, in the laminate 10, both the glass plate 1 and the polarizer 3 are laminated in direct contact with the first bonding layer 2. The glass plate 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, it is possible to prevent the polarizer surface on the glass plate side from absorbing moisture from the atmosphere. That is, the surface area of ​​the polarizer, which exhibits hygroscopic properties, can be halved, thereby suppressing the absorption of moisture from the atmosphere by the polarizer 3 and suppressing changes in the moisture content of the polarizer 3. From the viewpoint of suppressing a decrease in polarization degree after a heat resistance test, it is preferable to suppress changes in the moisture content of the polarizer 3.

[0040] The laminate 10 exhibits a small change in polarization degree after the heat resistance test. The change in polarization degree of the laminate 10 after the heat resistance test is, for example, 0.01 or more and 0.25 or less, preferably 0.03 or more and 0.2 or less, and more preferably 0.05 or more and 0.1 or less. The heat resistance test and the change in polarization degree are measured according to the method described in the Example section below.

[0041] The shape of the laminate 10 in top view (hereinafter also referred to as the top view shape) can be, for example, a square shape, preferably a square shape with a long side and a short side, and more preferably a rectangle. Each layer constituting the laminate 10 may have its corners rounded, its ends slotted, or its surfaces perforated in top view. In this specification, top view refers to observation from the thickness direction of the layers (lamination direction).

[0042] In addition, the square-shaped laminate 10 can be rolled into a cylindrical shape in a long strip.

[0043] When the planar shape of the laminate 10 is rectangular, the length of the long side can be, for example, 10 mm or more and 500 mm or less, preferably 50 mm or more and 300 mm or less, and more preferably 100 mm or more and 200 mm or less. The length of the short side can be, for example, 5 mm or more and 400 mm or less, preferably 20 mm or more and 300 mm or less, more preferably 40 mm or more and 200 mm or less, and even more preferably 60 mm or more and 180 mm or less.

[0044] The thickness of the laminate 10 is not particularly limited, but can be, for example, 60 μm or less, preferably 50 μm or less, more preferably 40 μm or less, and even more preferably 35 μm or less. The thickness of the laminate 10 is typically 30 μm or more.

[0045] The laminate 10 is bendable. "Bendable" means it can be bent without causing cracks. The laminate 10 can be bent with at least one of the glass plate 1 side as the inside and the other as the outside, preferably with the glass plate 1 side as the inside. In this specification, bending can include a folded shape where a curved surface is formed in the folded portion. In the folded shape, the radius of curvature of the folded inner surface is not particularly limited. Furthermore, bending can include a folded shape where the inner surface bending angle is greater than 0° and less than 180°, and a folded shape where the inner surface radius of curvature is approximately zero or the inner surface bending angle is 0°.

[0046] The laminate 10 can be disposed in an image display device. When the laminate is disposed in an image display device, it is preferably disposed on the viewing side of the image display device, preferably forming the outermost surface of the viewing side of the image display device, and more preferably formed by the glass plate 1 forming the outermost surface of the viewing side of the image display device. There are no particular limitations on the image display device; examples include organic electroluminescent (organic EL) display devices, inorganic electroluminescent (inorganic EL) display devices, liquid crystal display devices, and electroluminescent (EMF) display devices. If the laminate 10 is bendable, it is suitable for a flexible display.

[0047] [glass plate]

[0048] The glass plate 1 is laminated to one side of the polarizer 3 via the first bonding layer 2, thereby providing protection for the polarizer 3 and its surface. In this specification, the term "glass plate" includes the concept of a glass film.

[0049] The thickness of glass plate 1 is 100 μm or less. By making the thickness of glass plate 1 100 μm or less, it is easier to obtain a laminate with a small change in polarization degree after the heat resistance test. From the viewpoint of easily reducing the change in polarization degree after the heat resistance test, the thickness of glass plate 1 is preferably 90 μm or less, more preferably 80 μm or less, further preferably 70 μm or less, particularly preferably 60 μm or less, and even more particularly preferably 50 μm or less. The thickness of glass plate 1 is usually 10 μm or more, and from the viewpoint of easily reducing the change in polarization degree after the heat resistance test, it is preferably 20 μm or more, more preferably 30 μm or more.

[0050] As the glass plate 1, chemically strengthened glass can be used, for example. When the glass plate 1 is chemically strengthened glass, it is advantageous from the viewpoint of strength and light transmittance. By using chemically strengthened glass, the impact resistance of the laminate 10 can be improved while maintaining its flexibility. Chemically strengthened glass can be obtained through chemical ion exchange treatment of the glass. Through chemical ion exchange treatment, sodium and lithium ions on the glass surface are partially replaced by potassium ions with larger ionic radii, thereby increasing the strength of the glass surface. Surface strength is improved by forming a thin compressive stress layer. Examples of glasses used as chemically strengthened glass include aluminosilicate glass, soda-lime glass, borosilicate glass, lead glass, alkali barium glass, and aluminoborosilicate glass.

[0051] Chemical ion exchange treatment can be carried out by immersing the glass in an ion-exchange solution heated to above its melting point or by directly coating the glass with a paste-like ion-exchange solution. Examples of ion-exchange solutions include those based on potassium nitrate, potassium carbonate, potassium bicarbonate, potassium phosphate, potassium sulfate, and potassium hydroxide. Potassium nitrate (330°C) is preferred because its melting point is lower than that of glass (typically above 500°C and below 600°C) and it is easier to handle.

[0052] Etching can be performed before chemical ion exchange treatment to achieve thin-film glass formation. Etching can also be carried out using hydrofluoric acid or a solution obtained by mixing hydrofluoric acid with an aqueous solution of ammonium fluoride and organic acids such as formic acid, acetic acid, and propionic acid as the chemical treatment solution. These solutions can be used for etching via spraying, immersion, etc. Etching can also be performed using inert gases containing fluorine, such as He or Ar gas containing at least one of CF4, C3F8, C2F6, or XeF2, as the etching gas. Specifically, an inert gas containing fluorine diluted with He or Ar gas can be plasma-entrained at atmospheric pressure to release fluorine from fluorocarbons, thereby achieving etching.

[0053] When the laminate 10 of the present invention is attached to the image display element 8 (described later) and installed into the image display device 40, the glass plate 1 typically serves as the front panel, becoming the outermost surface of the viewing side of the image display device 40. Therefore, a surface treatment layer can be provided on the surface of the glass plate 1 opposite to the polarizer side. Examples of surface treatment layers include, for instance, an anti-reflective layer to prevent light reflection at the surface of the glass plate 1, an anti-glare layer to diffuse reflected light at the surface and thereby improve visibility, a water-resistant layer to prevent water droplets from adhering to the surface, and an oil-resistant layer to prevent oil from adhering to the surface. Furthermore, the front panel is a plate positioned at the very front of the image display device to protect it.

[0054] A surface protective film for preventing scratches or other damage to the surface of the glass plate 1 can be peelably laminated on the surface of the glass plate 1 opposite to the polarizer side, before the image display device is installed or after the image display device is installed and before it is used to display an image, thus becoming a laminate with a surface protective film.

[0055] [First bonding layer]

[0056] The first bonding layer 2 is disposed between the glass plate 1 and the polarizer 3, and has the function of bonding them together. The first bonding layer 2 can have a single-layer structure or a multi-layer structure, and preferably has a single-layer structure.

[0057] The thickness of the first bonding layer 2 is 10 μm or less. By making the thickness of the first bonding layer 2 10 μm or less, it is easier to obtain a laminate with a smaller change in polarization degree after the heat resistance test. From the viewpoint of easily reducing the change in polarization degree 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. The thickness of the first bonding layer 2 is usually 0.1 μm or more, and from the viewpoint of adhesion, it is preferably 0.5 μm or more, more preferably 1 μm or more.

[0058] The first bonding layer 2 comprises a cured product of an active energy radiation-curable composition or a pressure-sensitive adhesive composition. The first bonding layer 2 can be formed from an active energy radiation-curable composition or a pressure-sensitive adhesive composition. By forming the first bonding layer 2 from a cured product of an active energy radiation-curable composition or a pressure-sensitive adhesive composition, there is a tendency to easily obtain a laminate with a small change in polarization degree after heat resistance testing.

[0059] The active energy ray-curable composition has the property of curing upon exposure to active energy rays such as ultraviolet rays and electron beams. The active energy ray-curable composition can be a mixture of a free radical polymerizable (meth)acrylic acid compound and a photofree radical polymerization initiator, or a mixture of a cationic polymerizable epoxy compound and a photocationic polymerization initiator. Alternatively, a cationic polymerizable epoxy compound and a free radical polymerizable (meth)acrylic acid compound can be used together as initiators, along with a photocationic polymerization initiator and a photofree radical polymerization initiator.

[0060] When the first bonding layer 2 contains a cured product of an active energy ray curable composition, from the viewpoint of suppressing the change in polarization degree after the heat resistance test, the thickness of the first bonding layer 2 is preferably 0.1 μm or more and 5 μm or less, more preferably 0.5 μm or more and 3 μm or less.

[0061] When using an active energy radiation curable composition, in the formation of the first bonding layer 2, for example, the active energy radiation curable composition is applied to the bonding surface of at least one of the glass plate 1 and the polarizer 3. After the glass plate 1 and the polarizer are bonded together, active energy radiation is irradiated, thereby curing the active energy radiation curable composition. The light source of the active energy radiation is not particularly limited, but it is preferably active energy radiation (ultraviolet light) with a emission distribution at a wavelength of 400 nm or less. Specifically, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, chemical lamps, black light lamps, microwave-excited mercury lamps, metal halide lamps, etc., are preferred. The irradiation dose of the active energy radiation can be, for example, 100 mJ or more and 1500 mJ or less. From the viewpoint of suppressing the change in polarization degree after the heat resistance test, it is preferably 100 mJ or more and 1200 mJ or less, and more preferably 100 mJ or more and 400 mJ or less.

[0062] A pressure-sensitive adhesive composition is a high-viscosity liquid or gel-like solid that, after curing, can bond to substrates by applying slight pressure for a short time at room temperature (e.g., 23°C–25°C, 55–60% relative humidity). The pressure-sensitive adhesive composition can be formed from adhesive compositions primarily composed of resins such as (meth)acrylic, rubber, urethane, ester, silicone, and polyvinyl ether resins. From the viewpoints of transparency, weather resistance, heat resistance, and storage modulus, pressure-sensitive adhesive compositions based on (meth)acrylic resins are preferred. The pressure-sensitive adhesive composition can be either an active energy radiation-cured or thermosetting type.

[0063] The (meth)acrylate resin (base polymer) used in the pressure-sensitive adhesive composition is preferably a polymer or copolymer with one or more (meth)acrylate monomers such as butyl (meth)acrylate, ethyl (meth)acrylate, isooctyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate. Polar monomers are preferably copolymerized in the base polymer. Examples of polar monomers include (meth)acrylate, 2-hydroxypropyl (meth)acrylate, hydroxyethyl (meth)acrylate, (meth)acrylamide, N,N-dimethylaminoethyl (meth)acrylate, and glycidyl (meth)acrylate, which have carboxyl, hydroxyl, amide, amino, or epoxy groups.

[0064] Pressure-sensitive adhesive compositions may contain only the aforementioned base polymer, but typically also include a crosslinking agent. Examples of crosslinking agents include: crosslinking agents that form carboxylic acid metal salts with carboxyl groups as divalent or higher metal ions; crosslinking agents that form amide bonds with carboxyl groups as polyamine compounds; crosslinking agents that form ester bonds with carboxyl groups as polyepoxide compounds or polyols; and crosslinking agents that form amide bonds with carboxyl groups as polyisocyanate compounds. Among these, polyisocyanate compounds are preferred.

[0065] When the first bonding layer 2 contains a pressure-sensitive adhesive composition, the formation of the first bonding layer 2 can be carried out, for example, by dissolving or dispersing the pressure-sensitive adhesive composition in an organic solvent such as toluene or ethyl acetate to prepare a pressure-sensitive adhesive liquid, and directly applying the pressure-sensitive adhesive liquid to the bonding surface to form a pressure-sensitive adhesive layer; or by forming a pressure-sensitive adhesive layer in sheet form on a release film that has undergone a demolding treatment in advance, and transferring the pressure-sensitive adhesive layer to the bonding surface; etc.

[0066] The separator can be a film containing polyethylene resins such as polyethylene, polypropylene resins such as polypropylene, or polyester resins such as polyethylene terephthalate. A stretched polyethylene terephthalate film is preferred.

[0067] Pressure-sensitive adhesive compositions may contain optional components such as fillers, pigments, colorants, antioxidants, UV absorbers, antistatic agents, etc., including glass fibers, glass beads, resin beads, metal powder, other inorganic powders.

[0068] When the first bonding layer 2 contains a pressure-sensitive adhesive composition, the thickness of the first bonding layer 2 can be, for example, in the range of 1 μm or more and 10 μm or less, preferably 2 μm or more and 8 μm or less, and more preferably 3 μm or more and 6 μm or less.

[0069] [Polarizing filter]

[0070] Examples of polarizers 3 include stretched films or stretched layers with adsorbed dichroic pigments, or films obtained by coating with dichroic pigments and then curing them. Specifically, dichroic pigments can be iodine or dichroic organic dyes. Dichroic organic dyes include dichroic direct dyes formed from diazo compounds such as CIDIRECT RED 39, and dichroic direct dyes formed from compounds such as triazo and tetraazo.

[0071] Examples of films obtained by coating and curing dichroic pigments include films containing cured polymeric liquid crystal compounds, such as layers obtained by coating and curing compositions containing dichroic pigments with liquid crystal properties or compositions containing dichroic pigments and polymeric liquid crystals. Compared to stretched films or stretched layers with adsorbed dichroic pigments, films obtained by coating and curing dichroic pigments have no limitation on the bending direction and are therefore preferred.

[0072] (1) Polarizing film or stretching layer

[0073] First, a polarizer as a stretched film with adsorbed dichroic pigment will be described. The stretched film with adsorbed dichroic pigment can generally be manufactured through the following steps: uniaxial stretching of a polyvinyl alcohol (PVA) resin film; dyeing the PVA resin film with a dichroic pigment to adsorb the pigment; treating the PVA resin film with adsorbed dichroic pigment in a boric acid aqueous solution; and washing with water after the boric acid aqueous solution treatment. The thickness of the polarizer as a stretched film with adsorbed dichroic pigment can, for example, be 2 μm or more and 40 μm or less.

[0074] Polyvinyl alcohol-based resins can be obtained by saponifying polyvinyl acetate-based resins. Besides polyvinyl acetate as a homopolymer of vinyl acetate, copolymers of vinyl acetate with other monomers capable of copolymerizing with it can also be used as polyvinyl acetate-based resins. Examples of other monomers capable of copolymerizing with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and (meth)acrylamides with ammonium groups.

[0075] The degree of saponification of polyvinyl alcohol (PVA) resins is typically 85–100 mol%, preferably 98 mol% or more. PVA resins can be modified; for example, aldehyde-modified PVA formal or PVA acetal can be used. The degree of polymerization of PVA resins is typically 1000 or more and 10000 or less, preferably 1500 or more and 5000 or less.

[0076] For the polarizer 3, the moisture content of the polarizer 3 can be adjusted before it is loaded into the laminate 10. The moisture content of the polarizer 3 is preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 9.9% by mass or less. In addition, the moisture content of the polarizer 3 is preferably 4% by mass or more.

[0077] Next, the polarizer as a stretched layer adsorbed with dichroic pigment will be described. The stretched layer adsorbed with dichroic pigment can generally be manufactured through the following steps: applying a coating solution containing the aforementioned polyvinyl alcohol resin onto a substrate film; uniaxially stretching the resulting laminated film; dyeing the polyvinyl alcohol resin layer of the uniaxially stretched laminated film with a dichroic pigment to adsorb the pigment and form a polarizer; treating the film adsorbed with dichroic pigment with a boric acid aqueous solution; and washing with water after the boric acid aqueous solution treatment. The substrate film can be peeled off from the polarizer when the polarizer is loaded into the laminate, or it can be loaded into the laminate together with the polarizer. The material and thickness of the substrate film can be the same as the material and thickness of the thermoplastic resin film exemplified in the description of the protective layer described later.

[0078] (2) A polarizing film obtained by coating a dichroic pigment and then curing it.

[0079] As a film obtained by coating a dichroic pigment and curing it, examples include cured films obtained by coating a composition containing a dichroic pigment with liquid crystal properties, or a composition containing a dichroic pigment and a liquid crystal compound, onto a substrate on which an alignment film for polarizing is to be formed as needed, and then curing it. The material and thickness of the substrate can be the same as those of the thermoplastic resin film exemplified in the description of the protective layer described later. The substrate can be peeled off from the polarizing film when the polarizing film is loaded into the laminate, or it can be loaded into the laminate together with the polarizing film.

[0080] The film obtained by coating with a dichroic pigment and curing it is preferably thin, but if it is too thin, the strength will decrease and the processability will be poor. The thickness of the film is usually 20 μm or less, preferably 5 μm or less, and more preferably 0.5 μm or more and 3 μm or less.

[0081] As a film obtained by coating a dichroic pigment and curing it, specific examples include the films described in Japanese Patent Application Publication No. 2013-37353 and Japanese Patent Application Publication No. 2013-33249.

[0082] A polarizer alignment film can be disposed between the aforementioned substrate and a layer of a cured composition containing a dichroic pigment with liquid crystal properties, or a composition containing a dichroic pigment and a liquid crystal compound. The polarizer alignment film has an alignment restraint force that aligns the liquid crystal layer formed thereon in a desired direction. Examples of polarizer alignment films include an alignment polymer layer formed of an alignment polymer, a photoalignment polymer layer formed of a photoalignment polymer, and a trench alignment film having a raised or recessed pattern and multiple grooves on its surface. The thickness of the polarizer alignment film can be, for example, 10 nm or more and 500 nm or less, preferably 10 nm or more and 200 nm or less.

[0083] An orientation polymer layer can be formed by coating a composition obtained by dissolving an orientation polymer in a solvent onto a substrate, removing the solvent, and then subjecting it to friction treatment as needed. In this case, the orientation restraint force in the orientation polymer layer formed by the orientation polymer can be arbitrarily adjusted by the surface state of the orientation polymer and the friction conditions.

[0084] A photooriented polymer layer can be formed by coating a composition containing a polymer or monomer with photoreactive groups and a solvent onto a substrate and irradiating it with polarized light. In this case, the orientation constraint force in the photooriented polymer layer can be arbitrarily adjusted by the polarized light irradiation conditions of the photooriented polymer.

[0085] Groove-oriented films can be formed, for example, by methods such as exposing and developing the surface of a photosensitive polyimide film through an exposure mask with a patterned slit to form a raised or recessed pattern; forming an uncured layer of an active energy radiation-curable resin on a plate-shaped master disk with grooves on its surface and transferring the layer to a substrate for curing; forming an uncured layer of an active energy radiation-curable resin on a substrate and forming a raised or recessed pattern by pressing the layer onto a roller-shaped master disk or the like to cure it; etc.

[0086] [Other Constituent Elements]

[0087] The laminate 10 may further include a second bonding layer, a thermoplastic resin film, a phase difference layer, an adhesive layer, and a surface protective film (protective film).

[0088] [Second bonding layer]

[0089] The second bonding layer functions to bond a thermoplastic resin film to the side of the polarizer 3 opposite to the first bonding layer 2. The second bonding layer may, for example, comprise a cured product of an active energy radiation-curable composition or a pressure-sensitive adhesive composition illustrated in the description of the first bonding layer, or it may comprise a cured product of a water-based adhesive composition. Preferably, the second bonding layer comprises a cured product of a water-based adhesive composition.

[0090] Examples of aqueous adhesive compositions include adhesive compositions comprising aqueous solutions of polyvinyl alcohol (PVA) resins and aqueous two-component urethane emulsion adhesive compositions. Among these, aqueous adhesive compositions comprising aqueous solutions of PVA resins are preferred. As for the PVA resin, in addition to ethylene alcohol homopolymers obtained by saponifying polyvinyl acetate homopolymers, PVA copolymers obtained by saponifying copolymers of vinyl acetate and other monomers capable of copolymerizing therewith, or modified PVA polymers obtained by partially modifying their hydroxyl groups, etc., can also be used. Aqueous adhesive compositions may contain crosslinking agents such as aldehyde compounds (glyoxal, etc.), epoxy compounds, melamine compounds, hydroxymethyl compounds, isocyanate compounds, amine compounds, and polyvalent metal salts.

[0091] When using a water-based adhesive composition, after bonding the layers together, it is preferable to perform a drying process to remove water contained in the water-based adhesive composition. After the drying process, a curing process may also be provided, for example, at a temperature of 20°C or higher and 45°C or lower.

[0092] [Thermoplastic resin film]

[0093] The thermoplastic resin film can function to protect the surface of the polarizer 3. The thermoplastic resin film can be laminated on the side of the polarizer 3 opposite to the side of the first adhesive layer 2 via the second adhesive layer. Even when the thermoplastic resin film is laminated on the side of the polarizer 3 opposite to the first adhesive layer 2 via the second adhesive layer, the laminate 10 tends to have a small change in polarization after the heat resistance test.

[0094] As a thermoplastic resin film, it can be a thermoplastic resin film that is light-transmitting, preferably optically transparent. Examples include chain polyolefin resins (polyethylene resins, polypropylene resins, polymethylpentene resins, etc.), cyclic polyolefin resins (norbornene resins, etc.); cellulose resins such as triacetyl cellulose; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate resins; ethylene-vinyl acetate resins; polystyrene resins; polyamide resins; polyetherimide resins; (meth)acrylic resins such as poly(meth)acrylate resins; polyimide resins; polyethersulfone resins; polysulfone resins; polyvinyl chloride resins; polyvinylidene chloride resins; polyvinyl alcohol resins; polyvinyl alcohol acetal resins; polyetherketone resins; polyetheretherketone resins; polyethersulfone resins; and polyamide-imide resins. Thermoplastic resins can be used alone or in combination of two or more. From the viewpoint of strength and light transmittance, triacetyl cellulose resin films, cyclic polyolefin resin films, and (meth)acrylic resin films are preferred.

[0095] The thickness of the thermoplastic resin film can be, for example, 30 μm or less, and from the viewpoint of thinning, preferably 25 μm or less. It is also typically 1 μm or more, preferably 5 μm or more, and even more preferably 15 μm or more. The thermoplastic resin film may or may not have a phase difference.

[0096] The thermoplastic resin film may have a hard coating, an anti-reflective layer, or an antistatic layer on at least one surface. The hard coating, anti-reflective layer, and antistatic layer may be formed only on the surface of the substrate on the side where the cured material is not formed, or they may be formed only on the surface of the substrate on the side where the cured material is formed.

[0097] There is no particular limitation on the moisture permeability of thermoplastic resin films, but for example, it can be 1500 g / m³. 2 [ / 24hr] or less, preferably 1000 [g / m] 2 [ / 24hr] or less, more preferably 850 [g / m] 2 Below 24hr, it can be 500 g / m³ 2 [ / 24hr] or less. Additionally, the moisture permeability of thermoplastic resin films can be 10 [g / m³]. 2 [24hr] or more, or 100 [g / m] 2 [24hr] or more or 300 [g / m] 2 [24hr] or above. By laminating the glass plate 1 and the polarizer 3 in direct contact with the first bonding layer 2, the present invention can suppress the reduction of polarization degree after the heat resistance test even when the thermoplastic resin film has high moisture permeability.

[0098] [Phase difference layer]

[0099] The phase retardation layer can be laminated on the polarizer 3 side or the thermoplastic resin film side of the laminate 10 via the bonding layer described later.

[0100] The phase retardation layer can be a λ / 4 phase retardation layer that imparts a phase difference corresponding to 1 / 4 wavelength to the transmitted light, a λ / 2 phase retardation layer that imparts a phase difference corresponding to 1 / 2 wavelength to the transmitted light, a positive A plate, and a positive C plate. The phase retardation layer can be formed from a liquid crystal curing layer, or from a resin film exemplified above as a thermoplastic resin film material. When the phase retardation layer includes a liquid crystal curing layer, the phase retardation layer may further include an adhesive layer, an alignment layer, and a substrate, as described later.

[0101] The phase retardation layer preferably comprises a λ / 4 layer, and more preferably comprises at least one of a λ / 4 layer, a λ / 2 layer, and a positive C layer. When the phase retardation layer comprises a λ / 2 layer, the λ / 2 layer and the λ / 4 layer can be stacked sequentially from the polarizer 3 side. When the phase retardation layer comprises a positive C layer, the λ / 4 layer and the positive C layer can be stacked sequentially from the polarizer 3 side, or the positive C layer and the λ / 4 layer can be stacked sequentially from the polarizer 3 side.

[0102] Examples of polymeric liquid crystal compounds used in the formation of liquid crystal curing layers include compounds containing polymeric groups as described in "3.8.6 Network (Fully Cross-linked Type)" and "6.5.1 Liquid Crystal Materials b. Polymerizable Nematic Liquid Crystal Materials" of the Liquid Crystal Handbook (edited by the Liquid Crystal Handbook Editorial Committee and published by Maruzen Co., Ltd. on October 30, 2012), as well as polymeric liquid crystal compounds described in Japanese Patent Application Publication Nos. 2010-31223, 2010-270108, 2011-6360, 2011-207765, 2011-162678, 2016-81035, International Publication No. 2017 / 043438, and Japanese Patent Application Publication No. 2011-207765.

[0103] Methods for manufacturing a phase retardation layer from a polymer in an oriented state of a polymeric liquid crystal compound include, for example, the method described in Japanese Patent Application Publication No. 2010-31223.

[0104] The thickness of the phase retardation layer, which is a liquid crystal curing layer formed by curing a polymeric liquid crystal compound, is, for example, 0.1 μm or more and 10 μm or less, preferably 0.5 μm or more and 8 μm or less, and more preferably 1 μm or more and 6 μm or less.

[0105] The laminate of the present invention can be constructed as a circular polarizer having a λ / 4 phase difference layer. The circular polarizer can be used as a polarizer for anti-reflection purposes.

[0106] [Adhesive layer]

[0107] An adhesive layer may be disposed on the outermost layer of the laminate 10. The adhesive layer may be a layer used for bonding display modules such as a retardation layer and an image display element to the laminate 10. The adhesive layer is typically formed of an adhesive. Conventionally known adhesives can be used without particular limitation, and adhesives with base polymers such as acrylic polymers, urethane polymers, silicone polymers, and polyvinyl ether polymers can be used. Alternatively, active energy radiation-cured adhesives, thermosetting adhesives, etc., can be used. The adhesive layer has a diaphragm. The diaphragm is peeled off and removed when the display module, such as the retardation layer and the image display element, is bonded to the laminate 10.

[0108] [Surface protective film (protective film)]

[0109] A surface protective film (protective film) is a film used to protect the surface of the glass plate 1 from scratches, etc., and may be disposed on the glass plate 1 side of the laminate 10. The laminate 10 may include a surface protective film for protecting the glass plate 1 and its surface, typically the surface of the glass plate 1. The surface protective film is peeled off along with its adhesive layer, for example, after the laminate 10 is bonded to an image display element or other optical components. The adhesion force of the surface protective film relative to the glass plate 1 is typically 0.01 N / 25 mm to 1 N / 25 mm.

[0110] The surface protective film is formed, for example, from a substrate film and an adhesive layer laminated thereon. The description of the adhesive layer described above can be applied to the adhesive layer. The resin constituting the substrate film can be, for example, a polyethylene-based resin such as polyethylene, a polypropylene-based resin such as polypropylene, a polyester-based resin such as polyethylene terephthalate, polyethylene naphthalate, or a thermoplastic resin such as polycarbonate. A polyester-based resin such as polyethylene terephthalate is preferred. The surface protective film can be a single-layer film formed from a self-adhesive resin.

[0111] The thickness of the surface protective film is not particularly limited, but it is preferably set to a range of 20 μm or more and 200 μm or less. If the thickness of the substrate film is 20 μm or more, it tends to easily impart strength to the laminate 10.

[0112] [Layer Composition of Laminated Structures]

[0113] For the other layer of the laminate, refer to Figure 2 Please provide an explanation. Figure 2The laminate 20 shown includes a glass plate 1, a first bonding layer 2, a polarizer 3, a second bonding layer 4, and a thermoplastic resin film 5.

[0114] For the next layer of the laminate, refer to Figure 3 Please provide an explanation. Figure 3 The laminate 30 shown includes a surface protective 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.

[0115] [Manufacturing method of laminated bodies]

[0116] The laminate 10 can be manufactured, for example, by a manufacturing method that includes the following steps.

[0117] A process of bonding a glass plate and a polarizer by applying an active energy radiation-curable composition or a pressure-sensitive adhesive composition constituting a first bonding layer to either or both of the bonding surfaces of the glass plate or the polarizer.

[0118] When the first bonding layer is formed by the active energy radiation curable composition, the active energy radiation curable composition can be cured by irradiating it with active energy radiation after the glass plate and the polarizer are bonded together. The active energy radiation used to cure the active energy radiation curable composition can irradiate from either side or both sides of the glass plate and the polarizer. The amount of active energy irradiation can be, for example, 100 mJ or more and 1500 mJ or less, and from the viewpoint of suppressing the change in polarization after the heat resistance test, it is preferably 100 mJ or more and 1200 mJ or less, and more preferably 100 mJ or more and 400 mJ or less.

[0119] When a second bonding layer and a thermoplastic resin film are sequentially laminated on the side of the polarizer opposite to the first bonding layer, as in laminate 20, the laminate can be manufactured by a manufacturing method including the following steps.

[0120] The process of applying a water-based adhesive composition to the bonding surface of at least one of the polarizing film or the thermoplastic resin film;

[0121] The process of bonding polarizing film and thermoplastic resin film using a water-based adhesive composition;

[0122] A process of using heat to cure a water-based adhesive composition to form a second bonding layer containing a cured water-based adhesive composition;

[0123] The process of bonding a glass plate to the side of the polarizer opposite to the second bonding layer via the first bonding layer.

[0124] When the first bonding layer is formed by the active energy radiation curable composition, the active energy radiation curable composition can be cured by irradiating it with active energy radiation after the glass plate and the polarizer are bonded together. The active energy radiation used to cure the active energy radiation curable composition can irradiate from either side or both sides of the glass plate and the polarizer. The amount of active energy irradiation can be, for example, 100 mJ or more and 1500 mJ or less, and from the viewpoint of suppressing the change in polarization after the heat resistance test, it is preferably 100 mJ or more and 1200 mJ or less, and more preferably 100 mJ or more and 400 mJ or less.

[0125] Corona treatment, plasma treatment, etc., can be applied to one or both of the bonding surfaces, or a primer layer can be formed. The application of water-based adhesive compositions and active energy radiation-curable compositions can be carried out using various application methods, such as scraper, wire rod, slot coater, comma-type blade coater, gravure coater, etc.

[0126] When the first bonding layer 2 is formed from a pressure-sensitive adhesive composition, the first bonding layer 2 can be prepared in the form of an adhesive sheet. The adhesive sheet can be made, for example, by dissolving or dispersing the pressure-sensitive adhesive composition in an organic solvent such as toluene or ethyl acetate to prepare a pressure-sensitive adhesive liquid, applying the pressure-sensitive adhesive liquid to a release film that has undergone a demolding treatment to pre-form a pressure-sensitive adhesive layer in sheet form, and then bonding another release film onto this pressure-sensitive adhesive layer. The layers can be bonded by bonding an adhesive sheet with one release film peeled off to one layer, then peeling off another release film, and bonding another layer.

[0127] As a method for applying pressure-sensitive adhesive liquid to the release film, conventional coating techniques using slit coating machines, comma-type doctor blade coating machines, reverse roller coating machines, gravure coating machines, bar coating machines, wire-wound bar coating machines, scraper coating machines, air knife coating machines, etc., are acceptable.

[0128] 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 polyolefin films such as polypropylene films. The release layer can be formed, for example, from a release layer forming composition. The main component (resin) constituting the release layer forming composition is not particularly limited, and examples include silicone resins, alkyd resins, acrylic resins, and long-chain alkyl resins.

[0129] When the first bonding layer 2 contains a cured product of an active energy ray curable composition, the first bonding layer 2 can be formed by applying the active energy ray curable composition to the bonding surface using a known coating technique.

[0130] The thickness of the first bonding layer 2 can be adjusted according to the application conditions of the active energy radiation curable composition and the pressure-sensitive adhesive liquid. Reducing the coating thickness is effective in thinning the first bonding layer.

[0131] <Image display device>

[0132] The image display device of the present invention includes the aforementioned laminate. The image display device is not particularly limited, and examples include organic EL display devices, inorganic EL display devices, liquid crystal display devices, and electroluminescent display devices. The image display device may have a touch panel function. The aforementioned laminate can be a flexible optical laminate. Flexible optical laminates are suitable for image display devices that are flexible and can be bent or folded. In the image display device, the laminate is arranged on the viewing side of the image display device with the glass plate 1 side facing outwards.

[0133] The image display device of this invention can be used as mobile devices such as smartphones and tablets, televisions, digital photo frames, electronic billboards, measuring instruments, office equipment, medical equipment, computer equipment, etc. The image display device of this invention has excellent flexibility, and is therefore suitable for flexible displays, etc.

[0134] Figure 4 In the image display device 40 shown, the laminate 20 and the image display element 8 are laminated via an adhesive layer 7. Examples of the image display element 8 include liquid crystal cells, organic electroluminescent (organic EL) display elements, inorganic electroluminescent (inorganic EL) display elements, plasma display elements, field emission display elements, etc.

[0135] Example

[0136] The present invention will be further described in detail below through examples. Unless otherwise specified, "%" and "parts" in the examples refer to mass % and mass parts.

[0137] [Change in polarization degree after heat resistance test]

[0138] For the evaluation samples, the degree of polarization was measured using a UV-Vis-NIR spectrophotometer (V7100, manufactured by Nippon Spectrophotometer Co., Ltd.). Subsequently, after being placed in a heat resistance testing chamber at a temperature of 95°C for 48 hours, the degree of polarization was measured again.

[0139] (Example 1: Fabrication of Polarizer 1)

[0140] A hot roller stretching device is used to continuously stretch long strips of PVA-based resin film (thickness: 20 μm, saponification degree: ≥99.3 mol%) in a longitudinal uniaxial stretching manner to produce stretched films. During hot roller stretching, the surface temperature of the hot roller is set to 123°C, and the circumferential speed of the hot roller is set to be greater than that of the first traction roller. This difference in circumferential speed is used to apply tension (stretching force) to achieve stretching. For PVA-based resin film, it is first humidified in a humidification furnace before being fed into the hot roller stretching device.

[0141] The prepared stretched film was immersed in pure water at 30°C for 50 seconds while under tension (swelling process), and then immersed in a dyeing solution containing iodine at 28°C with a mass ratio of potassium iodide / water = 5.4 / 100 for 37 seconds (dyeing process). The stretched film treated in the dyeing process was then immersed in a crosslinking solution at 65°C with a mass ratio of potassium iodide / boric acid / water = 15 / 5.5 / 100 for 143 seconds (crosslinking process), rinsed in pure water at 5°C for 2 seconds, and then, while maintaining tension, the temperature of the blown hot air was increased from 40°C to 85°C, and simultaneously dried for 47 seconds to obtain a polarizer (film thickness: 7.2 μm) with iodine adsorbed and oriented on the PVA-based resin film. Based on the PVA-based resin film used as the raw material, the total cumulative stretching ratio of the polarizer was 4.5 times.

[0142] (Example 2: Fabrication of Polarizer 2)

[0143] 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 swelled by immersion in water (deionized water) at 29°C for 90 seconds. Then, it was dyed by immersion in a dyeing solution at 30°C containing 0.6 mmol / L iodine, 1.6 parts by mass of potassium iodide, and 0.3 parts by mass of boric acid. During this process, the film was stretched at stretch ratios of 1.72 and 1.54 during the swelling and dyeing stages, respectively, to achieve a cumulative stretch ratio of 2.64 up to the dyeing bath. Subsequently, it was crosslinked by immersion in a crosslinking solution at 52°C containing 8 parts by mass of potassium iodide and 4 parts by mass of boric acid for 54 seconds (crosslinking stage), while being stretched at a stretch ratio of 2.1. Then, crosslinking was performed by immersion in a crosslinking solution containing 9.5 parts by mass of potassium iodide and 3.8 parts by mass of boric acid at 45°C for 13 seconds (color correction stage), while simultaneously undergoing stretching. At this point, the total cumulative stretch ratio of the swelling, dyeing, crosslinking, and color correction stages reached 5.64 times. After crosslinking, the temperature of the blown hot air was increased from 65°C to 90°C, and the polyvinyl alcohol film was dried for 93 seconds to produce a polarizing film. The thickness of the polarizing film was 23.0 μm.

[0144] (Manufacturing Example 3: Preparation of Active Energy Ray Curable Composition 1)

[0145] The mixture was prepared by mixing and degassing 70 parts of 3,4'-epoxycyclohexanecarboxylic acid 3',4'-epoxycyclohexylmethyl ester (trade name "CELLOXIDE2021P" manufactured by Daicel Co., Ltd.), 20 parts of neopentyl glycol diglycidyl ether (trade name "EX-211L" manufactured by Nagase ChemteX Co., Ltd.), 10 parts of 2-ethylhexyl glycidyl ether, and 2.25 parts of the solid component of photopolymerization initiator (trade name "CPI-100P" manufactured by San-Apro Co., Ltd.).

[0146] (Manufacturing Example 4: Preparation of Active Energy Ray Curable Composition 2)

[0147] The mixture was prepared by mixing and degassing 20 parts of 3,4-epoxycyclohexanecarboxylic acid 3',4'-epoxycyclohexylmethyl ester (trade name "CELLOXIDE2021P" manufactured by Daicel Co., Ltd.), 70 parts of neopentyl glycol diglycidyl ether (trade name "EX-211L" manufactured by Nagase ChemteX Co., Ltd.), 2 parts of 4-hydroxybutyl vinyl ether (trade name "HBVE" manufactured by Carbide Japan), 8 parts of methyl methacrylate-glycidyl methacrylate copolymer (cationic polymer) (trade name "Marproof G-01100" manufactured by Nippon Oil), and 2.25 parts of the solid component of photopolymerization initiator (trade name "CPI-100P" manufactured by San-Apro Co., Ltd.).

[0148] (Manufacturing Example 5: Preparation of Water-Based Adhesive)

[0149] A polyvinyl alcohol-based resin adhesive was prepared by dissolving 3.5 parts of GOHSEFIMER™ Z-200 (Mitsubishi Chemical Corporation) (made by Mitsubishi Chemical Corporation) in 100 parts of water, 0.09 parts of zinc chloride, 0.35 parts of zinc nitrate, and 0.7 parts of glyoxal.

[0150] [Preparation of thin glass with a protective film]

[0151] After etching a glass plate (SCHOTT's "AS87-eco" (trade name), 100 μm thick), a chemical strengthening process was performed to produce a glass plate with a thickness of 50 μm. A surface protective film was then laminated onto one side of this glass plate to obtain a thin glass with a surface protective film.

[0152] <Example 1>

[0153] Corona treatment was performed on one side of polarizer 1, which was adjusted to 9.50% moisture content in a constant temperature and humidity bath (temperature 25℃, relative humidity 55%) (800W, 10m / min, bar width 700mm, one pass).

[0154] Triacetyl cellulose (TAC) membrane (thickness 40 μm, moisture permeability: 799 g / m³) 2 Corona treatment is performed on one side of the polarizer 1 (24h). A water-based adhesive is coated on the corona-treated side of the polarizer 1 to achieve a film thickness of 100nm after drying. The corona-treated side of the triacetyl cellulose (TAC) film is then bonded together and dried at 80°C for 120 seconds to obtain a polarizer with a TAC film.

[0155] Corona treatment is applied to the side of the polarizer with TAC film obtained above, which is opposite to the TAC film, i.e., the polarizer 1 side.

[0156] The thin glass surface with a protective film obtained above was subjected to corona treatment. An active energy X-ray curable composition 1 was coated onto the corona-treated surface of polarizer 1, resulting in a cured thickness of 3 μm. This coated surface was then bonded to the glass surface of the thin glass with the protective film. Ultraviolet light was irradiated from the TAC film side to cure the active energy X-ray curable composition, thereby obtaining the laminate of Example 1. For the laminate, the change in polarization degree after a heat resistance test was calculated. The results are shown in Table 1.

[0157] <Example 2>

[0158] Instead of using polarizer 1 with a moisture content adjusted to 9.50% as in Example 1, polarizer 1 with a moisture content adjusted to 9.98% under an atmosphere of 25°C and 95% relative humidity was used. Otherwise, the same procedure as in Example 1 was followed to obtain the laminate of Example 2. The results are shown in Table 1.

[0159] <Example 3>

[0160] Instead of using polarizer 1 with a moisture content adjusted to 9.50% as in Example 1, polarizer 1 with a moisture content adjusted to 7.35% under an atmosphere of 25°C and 0% relative humidity was used. Otherwise, the same procedure as in Example 1 was followed to obtain the laminate of Example 3. The results are shown in Table 1.

[0161] <Example 4>

[0162] Instead of using the active energy ray curable composition 1 in Example 1, active energy ray curable composition 2 was used, and the laminate of Example 4 was obtained by performing the same procedure as in Example 1. The results are shown in Table 1.

[0163] <Example 5>

[0164] A polarizer with a TAC film was fabricated in the same manner as in Example 1. Corona treatment was applied to the side of the polarizer 1 opposite to the TAC film. Corona treatment was also applied to the glass plate. An acrylic pressure-sensitive adhesive layer (5 μm thick) exposed by peeling off one diaphragm of the acrylic pressure-sensitive adhesive sheet was bonded to the corona-treated surface of the polarizer 1. The pressure-sensitive adhesive layer exposed by peeling off the other diaphragm was then bonded to the glass surface of a thin glass sheet with a surface protective film, resulting in the laminate of Example 5. The change in polarization after a heat resistance test was calculated for the laminate. The results are shown in Table 1.

[0165] <Example 6>

[0166] Instead of using polarizer 1 in Example 1, polarizer 2 was used, and the same procedure as in Example 1 was followed to obtain the laminate of Example 6. The results are shown in Table 1.

[0167] <Comparative Example 1>

[0168] A polarizer with a TAC film was fabricated in the same manner as in Example 1. Corona treatment was applied to the side of the polarizer 1 opposite to the TAC film. Corona treatment was also applied to one side of a separately prepared TAC film (40 μm thick). A water-based adhesive was coated onto the corona-treated side of the polarizer 1 to achieve a thickness of 100 nm after drying. The corona-treated side of the TAC film was then bonded and dried at 80°C for 120 seconds to obtain the laminate of Comparative Example 1. The change in polarization degree after a heat resistance test was calculated for the laminate. The results are shown in Table 1.

[0169] Table 1

[0170]

Claims

1. A layered body, wherein, A glass plate, a first bonding layer, and a polarizing film are stacked in sequence. Both the glass plate and the polarizer are laminated in direct contact with the first bonding layer. The thickness of the glass plate is more than 10 μm and less than 100 μm. The thickness of the first bonding layer is more than 1 μm and less than 10 μm. The first bonding layer comprises a cured product of an active energy radiation-curable composition or a pressure-sensitive adhesive composition. The moisture content of the polarizer is below 9.9% by mass. A second bonding layer and a thermoplastic resin film are sequentially stacked on the side of the polarizer opposite to the first bonding layer. The change in polarization degree after the heat resistance test, which is placed in an atmosphere at 95°C in a heat resistance testing machine for 48 hours, is greater than 0.01 and less than 0.

25.

2. The laminated body according to claim 1, wherein, The second bonding layer comprises a cured product of a water-based adhesive composition.

3. An image display device comprising the laminate as described in claim 1 or 2.

4. A method for manufacturing a laminate, which is the method for manufacturing a laminate as described in claim 2, comprising: The process of applying a water-based adhesive composition to the bonding surface of at least one of the polarizing film or the thermoplastic resin film. The process of bonding the polarizer and the thermoplastic resin film using the aqueous adhesive composition. The process of using heat to cure the water-based adhesive composition to form a second bonding layer comprising a cured product of the water-based adhesive composition. The process of bonding a glass plate to the side of the polarizer opposite to the second bonding layer via the first bonding layer.

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