TW202015895A - Laminate and method for producing the same - Google Patents

Abstract

The invention relates to a laminate and a method for producing the same. The present invention provides a bendable laminate that is free of stains on the surface of the laminate on the visible side. The laminate comprises a first optical member composed of at least one layer, a bonding layer, and a second optical member composed of at least one layer sequentially. The laminate also comprises a colored layer partially formed on the surface of the bonding layer side of the first optical member or the second optical member. The first optical member is disposed to be closer to the viewing side of the laminate than the second optical member. The laminate satisfies the following formula (1): wherein SPa represents the sum of the product Pa of the elastic modulus Ea of each layer constituting the first optical member and the thickness ta, SPb is the sum of the product Pb of the elastic modulus Eb of each layer constituting the second optical member and the thickness tb and Spa > SPb.

Description

Laminated body and its manufacturing method

The present invention relates to a laminate and a method of manufacturing the same.

Patent Document 1 describes a laminate in which a front panel and a smooth layer are laminated, and a printed layer is formed as a colored layer on the peripheral portion of the surface of the front panel on the smooth layer side. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2014-238533

[Problems to be solved by the invention]

A laminate having an optical member partially formed with a colored layer may have a situation where the reflection image visually recognized on the surface of the laminate is distorted at the boundary between the area where the colored layer exists and the area where it does not exist, and the appearance quality is reduced.

The present invention provides a laminate including a first optical member and a second optical member, and a reflection view of the surface of the laminate on the first optical member side at the boundary between the area where the colored layer exists and the area where it does not exist Like no distortion. [Technical means to solve the problem]

The present invention provides a laminate as shown below and a manufacturing method thereof. [1] A laminate comprising a first optical member including at least one layer, a bonding layer, and a second optical member including at least one layer in sequence, and further including a first optical member formed locally or For the coloring layer on the surface of the second optical member on the bonding layer side, the first optical member is disposed on the viewing side of the laminate more than the second optical member, and satisfies the following formula (1). S _Pa > S _Pb (1) [In the formula, S _Pa represents the sum of the elastic modulus E _a of each layer constituting the first optical member and the product P _a of the thickness t _a , and S _Pb represents the sum of each layer constituting the second optical member Sum of product P _b of elastic modulus E _b and thickness t _b ] [2] The laminate as described in [1], wherein the first optical member is a front panel, and the front panel includes a resin film. [3] The laminate according to [1] or [2], wherein the second optical member includes at least one selected from the group consisting of a touch sensing panel and a polarizing plate. [4] The laminate according to any one of [1] to [3], wherein the colored layer is partially formed on the surface of the second optical member on the bonding layer side. [5] The laminate according to any one of [1] to [4], wherein the thickness of the colored layer is 0.1 μm or more and 50 μm or less. [6] A display device comprising the laminate as described in any one of [1] to [5]. [7] A method for manufacturing a laminate, which is the method for manufacturing a laminate as described in any one of [1] to [5], and includes: a preparation step, which prepares the first optical member and the second An optical member; a colored layer forming step that forms a colored layer locally on the surface of one of the first optical member or the second optical member; and a bonding step that connects the first optical member and the second The optical member is bonded via the bonding layer. [Effect of invention]

According to the present invention, it is possible to provide a layered body comprising the first optical member and the second optical member, and the boundary between the region where the colored layer exists and the region where it does not exist is visually recognized on the surface of the layered body on the side of the first optical member The reflected image is not distorted.

Hereinafter, the embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments. In all the drawings below, in order to easily understand each component, the reduction ratio is appropriately adjusted and shown. The reduction ratio of each component shown in the drawings may not be the same as the actual reduction ratio of the component.

<Laminate> FIG. 1 is a schematic cross-sectional view of a laminate according to an embodiment of the present invention. The laminate 100 shown in FIG. 1 includes a first optical member 10 including at least one layer, a bonding layer 20, and a second optical member 30 including at least one layer in this order. The laminate 100 further includes a coloring layer 40 that is partially formed on the second optical member.

The laminate 100 satisfies the following formula (1). S _Pa > S _Pb (1) [where, S _Pa represents the sum of the products P _a of the elastic modulus E _a (GPa) and the thickness t _a (mm) of each layer constituting the first optical member 10, and S _Pb represents the composition [Total Product of Elastic Modulus E _b (GPa) and Thickness t _b (mm) P _b of Each Layer of the Second Optical Member 30] In the present invention, the elastic modulus is a value measured at 25°C.

In the laminate formed by bonding the first optical member and the second optical member via the bonding layer, there may be a case where the reflected image visually recognized on the surface of the laminate is distorted, and the appearance quality of the laminate is lowered. The inventors conducted research on the occurrence of distortion and found that when the colored layer is partially formed on the first optical member or the second optical member, when the first optical member and the second optical member are bonded together, The colored layer forming portion is extruded to the outside of the layered body (viewing side). As a result, the outer surface of the layered body of the optical member on the viewable side of the layered body is the boundary between the colored layer forming portion and the colored layer non-forming part There is a step difference, and therefore distortion occurs in the reflected image. Further research was conducted to suppress the distortion of the reflected image, and as a result, it was found that the above-mentioned formula (1) is satisfied when the first optical member and the second optical member are bonded together, so that the reflected image is less likely to be distorted. It is presumed that the reason is that the optical member on the non-visual side of the laminated body is more easily deformed than the optical member on the visual side of the laminated body, and therefore the deformation of the optical member on the visual side of the laminated body is suppressed and the surface becomes flat. Furthermore, the distortion of the reflected image includes not only the case where the reflected image is distorted, but also the case where the reflected image is interrupted or the outline is broken.

Regarding S _Pa and S _Pb , the difference between S _Pa and S _Pb can be, for example, 0.005 GPa·mm or more and 0.3 GPa·mm or less, preferably 0.020 GPa·mm or more and 0.20 GPa·mm or less, more preferably 0.030 GPa· mm or more and 0.16 GPa·mm or less.

Regarding S _Pa and S _Pb , the ratio of S _Pb to S _Pa may be, for example, 0.1 or more and less than 1, preferably 0.2 or more and 0.9 or less, and more preferably 0.3 or more and 0.85 or less.

The first optical member 10 and the second optical member 30 each include at least one layer. The first optical member 10 and the second optical member 30 may include only one layer, or may include two or more layers. Preferably, at least one of the first optical member 10 and the second optical member 30 includes two or more layers, and more preferably the second optical member 30 includes two or more layers.

The thickness, elastic modulus, and number of layers of each layer constituting the first optical member 10 and the second optical member 30 can be selected so as to satisfy the formula (1).

From the viewpoint of suppressing the distortion of the reflected image, the laminate 100 preferably includes only the bonding layer 20 and the partially formed coloring layer 40 between the first optical member 10 and the second optical member 30.

The shape of the layered body 100 in the plane direction may be, for example, a square shape, preferably a square shape having long sides and short sides, and more preferably a rectangular shape. When the shape of the surface direction of the laminate 100 is a rectangle, the length of the long side may be, for example, 10 mm or more and 1400 mm or less, preferably 50 mm or more and 600 mm or less. The length of the short side is, for example, 5 mm or more and 800 mm or less, preferably 30 mm or more and 500 mm or less, more preferably 50 mm or more and 300 mm or less.

The thickness of the laminate 100 depends on the function required for the laminate and the use of the laminate, so it is not particularly limited, for example, 20 μm or more and 1,000 μm or less, preferably 50 μm or more and 500 μm or less, 80 μm Above and below 300 μm.

The step difference generated by the laminate 100 on the outer surface of the laminate on the side of the first optical member 10 may be, for example, 350 nm or less, preferably 300 nm or less, more preferably 200 nm or less, and further preferably 100 nm or less. When the step difference is 350 nm or less, the reflected image viewed on the surface of the first optical member tends not to be distorted. The step difference is preferably 0 nm, but there may be a step difference of 5 nm or more and a step difference of 10 nm or more.

The laminate 100 is preferably bendable. The laminate 100 is preferably capable of bending when the radius of curvature is 2.5 mm. Being able to bend means that the laminate 100 can be bent without cracking. It is preferable that the laminate 100 can be bent toward the inside of the first optical member 10. It is more preferable that the laminate 100 does not cause cracking even if the curvature radius of the inner surface of the structure is 2.5 mm and the number of bending is 10,000.

The laminate 100 can be used for a display device or the like, for example. The 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 electroluminescence display devices. The display device may have a touch panel function. The laminate 100 is suitable for a flexible display device.

(1st optical member) The first optical member 10 is a member disposed closer to the viewing side of the laminate than the second optical member 30. For example, when the laminated body 100 is used in a display device, in the display device, the laminated body 100 is arranged on the display device with the first optical member 10 facing outward (the side opposite to the display element side, that is, the viewing side) The visible side of the display element. As long as the first optical member 10 is a plate-shaped body that can transmit light, the material and thickness are not limited, and may include only one layer, or may include two or more layers, and can be exemplified by a plate-shaped body made of glass (for example, glass Plate, glass film, etc.), resin-made plate-like body (for example, resin plate, resin sheet, resin film, etc.).

The thickness of the first optical member 10 may be, for example, 30 μm or more and 500 μm or less, preferably 50 μm or more and 200 μm or less, and more preferably 50 μm or more and 100 μm or less. In the present invention, the thickness of each layer can be measured according to the thickness measurement method described in the following examples.

Constituting the elastic modulus E _a and the thickness of each of the first optical member 10 of the product of t _a P _a sum of S _Pa (GPa · mm), for example, may be 0.015 GPa · mm or more and 20 GPa · mm or less, preferably 0.1 GPa·mm or more and 10 GPa·mm or less, more preferably 0.15 GPa·mm or more and 5 GPa·mm or less, and further preferably 0.2 GPa·mm or more and 1 GPa·mm or less.

When the first optical member 10 is a glass plate, it is preferable to use tempered glass for a display for the glass plate. The thickness t _{a of the} glass plate may be, for example, 0.05 mm or more and 1 mm or less. The elastic modulus E _{a of the} glass plate may be, for example, 500 GPa or more and 1,000 GPaMPa or less. By using a glass plate, the first optical member 10 having excellent mechanical strength and surface hardness can be constructed. In the present invention, the elastic modulus of each layer can be measured according to the elastic modulus measurement method described in the following examples.

When the first optical member 10 is a resin film, the resin film is not limited as long as it can transmit light. For example, triacetyl cellulose, acetyl cellulose butyrate, ethylene-vinyl acetate copolymer, propyl cellulose, butyl cellulose, acetyl cellulose, polyester, polystyrene, Polyamide, polyetherimide, polyacrylic acid, polyimide, polyether sock, poly sock, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol , Polyvinyl acetal, polyether ketone, polyether ether ketone, polyether ballast, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate Films made of polymers such as diesters, polycarbonates, and polyimides. These polymers can be used alone or in combination of two or more. From the viewpoint of improving strength and transparency, a resin film formed of a polymer such as polyimide, polyamide, polyamidimide, and the like is preferable.

The resin film may be a film provided with a hard coat layer on at least one side of the base film to further increase the hardness. The hard coat layer may be formed on one side of the base film or on both sides. By providing a hard coat layer, a resin film with improved hardness and scratch resistance can be made. The hard coat layer is, for example, a hardened layer of ultraviolet-curable resin. Examples of the ultraviolet-curable resins include acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. In order to increase strength, the hard coat layer may also contain additives. The additive is not limited, and examples thereof include inorganic fine particles, organic fine particles, and mixtures thereof. The thickness t _{a of the} resin film may be, for example, 30 μm or more and 2,000 μm or less, preferably 50 μm or more and 1,000 μm or less, more preferably 50 μm or more and 500 μm or less, or 100 μm or less. The elastic modulus E _{a of the} resin film may be, for example, 500 MPa or more and 10,000 MPa or less, preferably 1,000 MPa or more and 9,000 MPa or less, more preferably 2,000 MPa or more and 8,000 MPa or less, and further preferably 3,000 MPa or more and 7,000 MPa or less.

When the laminated body 100 is used in a display device, the first optical member 10 may have a function as a component used in a general display device, for example, a front panel (window film) in the display device. When the first optical member 10 functions as a front panel, it may not only have a function of protecting the front surface of the display device, but also a function as a touch sensor, a blue light cutoff function, a viewing angle adjustment function, and the like. The front panel preferably contains the above-mentioned resin film.

(Second optical member) As the second optical member 30, a plate-shaped body that can transmit light or a component used in a general display device can be used.

The thickness of the second optical member 30 may be, for example, 5 μm or more and 2,000 μm or less, preferably 10 μm or more and 1,000 μm or less, and more preferably 15 μm or more and 500 μm or less.

The sum of the product of the elastic modulus E _b of each layer constituting the second optical member 30 and the thickness t _b P _b S _Pb (GPa·mm) may be, for example, 0.01 GPa·mm or more and 10 GPa·mm or less, preferably 0.015 GPa·mm or more and 6 GPa·mm or less, more preferably 0.02 GPa·mm or more and 5 GPa·mm or less, and further preferably 0.04 GPa·mm or more and 3.5 GPa·mm or less.

The plate-shaped body may include only one layer or two or more layers, and the plate-shaped body described in relation to the first optical member 10 may be used as an example.

As constituent elements used in a general display device used for the second optical member 30, for example, a touch sensing panel, a polarizing plate, a retardation film, etc. may be mentioned. The second optical member 30 preferably includes at least one selected from the group consisting of a touch sensing panel and a polarizing plate.

(Touch sensing panel) As the touch-sensing panel, as long as it is a sensor capable of detecting the touch position, the detection method is not limited, and examples include a resistive film method, an electrostatic capacitance coupling method, a light sensing method, an ultrasonic method, and an electromagnetic induction coupling method , Surface elastic wave method and other touch sensing panels. In terms of low cost, the touch sensing panel of the resistive film method and the electrostatic capacitance coupling method can be preferably used.

An example of a resistive film type touch-sensing panel includes a pair of substrates opposed to each other, an insulating spacer sandwiched between the pair of substrates, and a resistive film provided on the inner front surface of each substrate Transparent conductive film and touch position detection circuit. In an image display device provided with a touch sensing panel of a resistive film method, if the surface of the first optical member 10 is touched, the opposing resistive film is short-circuited, and current flows through the resistive film. The touch position detection circuit detects the change in voltage at this time to detect the touch position.

An example of a touch sensing panel of an electrostatic capacitance coupling method includes a substrate, a transparent electrode for position detection provided on the entire surface of the substrate, and a touch position detection circuit. In an image display device provided with a touch sensing panel of an electrostatic capacitance coupling method, if the surface of the first optical member 10 is touched, the transparent electrode is grounded through the electrostatic capacitance of the human body at the touch point. The touch position detection circuit detects the grounding of the transparent electrode to detect the touch position.

The thickness t _{b of the} touch sensing panel may be, for example, 5 μm or more and 2,000 μm or less, or 5 μm or more and 100 μm or less. The elastic modulus E _{b of the} touch sensing panel may be, for example, 1,000 MPa or more and 7,000 MPa or less.

(Polarizer) Examples of the polarizing plate include a film including a stretched film adsorbed with an anisotropic absorption dye, or a film obtained by coating and curing an anisotropic absorption dye as a polarizing element. Examples of the dye having absorption anisotropy include dichroic dyes. As the dichroic dye, specifically, iodine or a dichroic organic dye is used. Dichroic organic dyes include dichroic direct dyes containing C.I. DIRECT RED 39 and other diazo compounds, and dichroic direct dyes containing triazo and tetraazo compounds. As a film used as a polarizing element by coating an anisotropic dye and curing it, a composition having a coating containing a dichroic dye having liquid crystallinity or a dichroic dye and a polymerizable liquid crystal can be cited The composition and harden the resulting layer of the film. The film obtained by coating and curing an anisotropic pigment is harder than the stretched film having an anisotropic pigment absorbed, and the bending direction is not limited, so it is preferable.

(1) Polarizing plate with stretch film as polarizing element A polarizing plate having a stretched film adsorbed with an anisotropically absorbing dye as a polarizing element will be described. As the polarizing element, the stretched film adsorbed with an anisotropic dye is usually manufactured through the following steps: a step of uniaxially stretching the polyvinyl alcohol-based resin film; a polyvinyl alcohol-based resin film by using a dichroic dye The step of dyeing and adsorbing the dichroic pigment; the step of treating the polyvinyl alcohol-based resin film adsorbed with the dichroic pigment by the aqueous solution of boric acid; and the step of washing with water after the treatment with the aqueous solution of boric acid. The above-mentioned polarizing element may be used directly as a polarizing plate, or a polarizing plate may be used if a transparent protective film is attached to one or both sides. The thickness of the polarizing element thus obtained is preferably 2 μm or more and 40 μm or less.

The polyvinyl alcohol-based resin is obtained by saponifying the polyvinyl acetate-based resin. As the polyvinyl acetate-based resin, in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer of vinyl acetate and other monomers copolymerizable therewith can also be used. Examples of other monomers capable of copolymerizing with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and acrylamides having an ammonium group.

The saponification degree of the polyvinyl alcohol-based resin is usually 85 mol% or more and 100 mol% or less, preferably 98 mol% or more. The polyvinyl alcohol-based resin may be modified, for example, polyvinyl formal or polyvinyl acetal obtained by aldehyde modification may be used. The degree of polymerization of the polyvinyl alcohol-based resin is usually about 1,000 or more and 10,000 or less, preferably in the range of 1,500 or more and 5,000 or less.

A film made of such a polyvinyl alcohol-based resin is used as a raw film of a polarizing plate. The method of forming the polyvinyl alcohol resin film is not particularly limited, and the film can be formed by a known method. The film thickness of the polyvinyl alcohol-based green film can be, for example, about 10 μm or more and 150 μm or less.

The uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before dyeing with the dichroic pigment, simultaneously with dyeing, or after dyeing. In the case of uniaxial stretching after dyeing, the uniaxial stretching may be performed before boric acid treatment, or may be performed in boric acid treatment. Moreover, uniaxial extension can also be performed in these plural stages. In uniaxial stretching, uniaxial stretching can be performed between rollers with different peripheral speeds, or uniaxial stretching can also be performed using hot rollers. In addition, the uniaxial stretching may be dry stretching in the atmosphere, or wet stretching using a solvent in a state where the polyvinyl alcohol-based resin film is swelled. The stretching magnification is usually about 3 to 8 times.

The thickness t _b of the polarizing plate provided with the stretched film as the polarizing element may be, for example, 1 μm or more and 400 μm or less, or may be 5 μm or more and 100 μm or less. The elastic modulus E _b of the polarizing plate provided with the stretched film as the polarizing element may be, for example, 1,000 MPa or more and 5,000 MPa or less.

The material of the protective film attached to one side or both sides of the polarizing element is not particularly limited, and examples thereof include cyclic polyolefin-based resin films, and acetic acid including resins such as triethyl cellulose and diethyl cellulose. Cellulose-based resin films, polyester-based resin films containing resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate, polycarbonate-based resin films, ( Methacrylic resin films, polypropylene resin films, and the like are known in the art. From the viewpoint of thinning, the thickness t _{b of the} protective film is usually 300 μm or less, preferably 200 μm or less, more preferably 100 μm or less, and usually 5 μm or more, preferably 20 μm or more. The protective film may or may not have a phase difference. The elastic modulus E _{b of the} protective film can be, for example, 1,000 MPa or more and 5,000 MPa or less.

(2) Polarizing plate with a film formed of a liquid crystal layer as a polarizing element A polarizing plate including a film formed of a liquid crystal layer as a polarizing element will be described. As a film used as a polarizing element coated with an anisotropic dye, a composition containing a dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a liquid crystal compound is applied to The substrate and the resulting film are cured. The film can be used as a polarizing plate by peeling off the substrate or together with the substrate, or it can be used as a polarizing plate with a protective film on one or both sides. As this protective film, the same as the above-mentioned polarizing plate provided with a stretch film as a polarizing element can be mentioned.

The film obtained by coating and curing an anisotropic pigment is preferably thin, but if it is too thin, the strength tends to decrease and the processability tends to 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.

As the film obtained by coating the anisotropic dye, the film described in Japanese Patent Laid-Open No. 2013-148883 and the like can be specifically mentioned.

The thickness t _b of a polarizing plate provided with a film formed of a liquid crystal layer as a polarizing element can be, for example, 1 μm or more and 50 μm or less, and the elastic modulus E _b of a polarizing plate provided with a film formed of a liquid crystal layer as a polarizing element can be, for example, 500 MPa or more and 5,000 MPa or less.

(Retardation film) The retardation film may include one or more retardation layers. As the phase difference layer, there may be a positive A plate, a negative A plate, and a positive C plate such as a λ/4 plate or a λ/2 plate. The retardation layer may be formed of a resin film exemplified as the material of the protective film, or may be formed of a layer formed by curing a polymerizable liquid crystal compound. The retardation film may further include an alignment film or a base film.

The thickness t _{b of the} retardation film may be, for example, 1 μm or more and 50 μm or less, and the elastic modulus E _b of a polarizing plate provided with a film formed of a liquid crystal layer as a polarizing element may be, for example, 1,000 MPa or more and 4,000 MPa or less.

(Laminated layer) The bonding layer 20 is a layer that is bonded between the first optical member 10 and the second optical member 30, and may be, for example, an adhesive layer or an adhesive layer. From the viewpoint that the step difference of the colored layer 40 can be absorbed well, the bonding layer 20 is preferably an adhesive layer.

The adhesive layer can be composed of an adhesive composition mainly composed of resins such as (meth)acrylic, rubber, urethane, ester, polysiloxane, and polyvinyl ether resins. Among them, an adhesive composition based on a (meth)acrylic resin excellent in transparency, weather resistance, heat resistance, etc. as a base polymer is preferred. The adhesive composition may be active energy ray hardening type or thermosetting type.

The (meth)acrylic resin (base polymer) used as the adhesive composition is preferably, for example, butyl (meth)acrylate, ethyl (meth)acrylate, or (meth)acrylic acid. One or more of octyl ester and (meth)acrylate of 2-ethylhexyl (meth)acrylate are monomeric polymers or copolymers. The base polymer is preferably a copolymer of polar monomers. Examples of polar monomers include (meth)acrylic acid, (meth)acrylic acid 2-hydroxypropyl ester, (meth)acrylic acid hydroxyethyl ester, (meth)acrylamide, (meth)acrylic acid N, N-dimethylaminoethyl, glycidyl (meth)acrylate monomers with carboxyl, hydroxyl, amide, amine, epoxy, etc.

The adhesive composition may contain only the above base polymer, but usually contains a crosslinking agent. As the cross-linking agent, there can be exemplified: metal ions with a divalent or higher, which form a metal salt of carboxylic acid with the carboxyl group; polyamine compound, which forms an amide bond with the carboxyl group; polyepoxy compound or polyol, which The carboxyl group forms an ester bond; the polyisocyanate compound forms an amide bond with the carboxyl group. Among them, polyisocyanate compounds are preferred.

The active energy ray-curable adhesive composition means that it has a property of being hardened by being irradiated with active energy rays such as ultraviolet rays or electron beams, and has adhesiveness even before the active energy ray is irradiated and can be adhered to a film, etc. to be adhered The adhesive composition can be hardened by irradiation with active energy rays to adjust the properties of adhesion. The active energy ray-curable adhesive composition is preferably an ultraviolet-curable type. The active energy ray-curable adhesive composition contains an active energy ray polymerizable compound in addition to the base polymer and the cross-linking agent. Furthermore, there may be a case where a photopolymerization initiator, a photosensitizer, etc. are contained as needed.

The adhesive composition may contain fine particles, beads (resin beads, glass beads, etc.), glass fibers, resins other than the base polymer, adhesion imparting agents, fillers (metal powder or other inorganic powder) to impart light scattering Etc.), antioxidants, ultraviolet absorbers, dyes, pigments, colorants, defoamers, corrosion inhibitors, photopolymerization initiators and other additives.

It can be formed by applying the organic solvent dilution liquid of the above-mentioned adhesive composition on a substrate and drying it. In the case of using an active energy ray-curable adhesive composition, a cured product having a desired degree of hardening can be produced by irradiating the formed adhesive layer with active energy rays.

From the viewpoint of absorbing the step difference of the colored layer 40, the thickness of the bonding layer 20 is preferably thicker than the thickness of the colored layer 40, for example, preferably 3 μm or more and 100 μm or less, more preferably 5 μm or more and 50 Below μm, it can also be above 20 μm.

(Coloring layer) The colored layer 40 has a function of improving the visibility of displayed images and the like, for example, when used in a display device, and preventing the wiring and the like in the display device from being visually recognized from the outside of the display device. The colored layer 40 may have an optical density of 3 or more, and preferably 3.2 or more, for example.

The shape and color of the colored layer 40 are not limited, and can be appropriately selected according to the application or design of the display device using the laminate, for example. The colored layer 40 contains a colorant. The colored layer 40 may include only one layer, or may include two or more layers. When the coloring layer 40 includes two or more layers, at least one of the two or more layers is a coloring agent-containing layer containing a colorant, and the remaining layers may or may not contain a colorant. As the color of the colorant, there can be exemplified: black, red, white, navy blue, silver, gold, etc. The coloring layer 40 may have a coloring agent-containing layer with a high light-shielding property under the coloring agent-containing layer containing the colorant, or a base layer that improves adhesion. Moreover, you may have a transparent protective layer which coats a coloring agent containing layer.

The colorant can be appropriately selected according to the desired color. Examples of the colorant include inorganic pigments such as carbon black such as titanium dioxide, zinc white, and acetylene black, iron black, red lead, molybdenum cadmium red, ultramarine blue, cobalt blue, chrome yellow, and titanium yellow; phthalocyanine blue and indanthrene Organic pigments or dyes such as forest blue, isoindolinone yellow, benzidine yellow, quinacridone red, polyazo red, perylene red, aniline black; metal pigments including scaly foils such as aluminum and brass; Pearlescent pigments (pearl pigments) containing scaly foils such as titanium dioxide coated mica and alkaline lead carbonate. In this specification, the metal contained in the plating layer is also included in the colorant.

Each layer of the colored layer 40 can be formed by a printing method, a coating method, a plating method, or the like. In FIG. 1, the colored layer 40 is partially formed on the surface of the second optical member 30 on the bonding layer 20 side, but the colored layer 40 may also be partially formed on the surface of the first optical member 10 on the bonding layer 20 side on. The colored layer 40 may be directly formed on the surface of the first optical member 10 or the second optical member 30 that becomes the bonding layer 20 side, or may be transferred to the first optical member 10 or the second member formed on another substrate The optical member 30 is formed on the surface of the bonding layer 20 side. Specific examples of the printing method include gravure printing, offset printing, screen printing, and transfer printing of a self-transfer sheet. The printing by the printing method can also be repeated to obtain the coloring layer 40 of the required thickness. Examples of inks used in the printing method include inks containing colorants, adhesives, solvents, and optional additives. From the viewpoint of reducing the step difference, the colored layer 40 is preferably formed locally on the surface of the second optical member 30 on the side of the bonding layer 20.

Examples of the binder include chlorinated polyolefins (for example, chlorinated polyethylene and chlorinated polypropylene), polyester resins, urethane resins, acrylic resins, vinyl acetate resins, and vinyl chloride-acetic acid. Vinyl ester copolymer, cellulose resin. The binder resin can be used alone or in combination of two or more. As for the binder resin, a thermally polymerizable resin or a photopolymerizable resin can be used.

When the coloring agent-containing layer is formed by a printing method, it is preferable to use an ink containing 50 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the binder resin.

Specific examples of the plating method include well-known plating methods such as electroplating, electroless plating, melt plating, chemical vapor deposition, and physical vapor deposition. Examples of physical vapor deposition include evaporation systems including vacuum evaporation, molecular beam evaporation, ion beam evaporation, and other methods for heating and evaporating an evaporation source, sputtering systems such as magnetron sputtering, and ion beam sputtering. These methods may combine patterning as needed. In this specification, the layer formed by the plating method is called a plating layer.

In the case where the colored layer 40 is provided on the peripheral portion of the first optical member 10 or the second optical member 30, it is not limited to the form provided on the entire circumference of the peripheral portion, but may be designed according to the required design, etc. It is installed in a part of the periphery. When the colored layer 40 is provided on the peripheral portion of the first optical member 10 or the second optical member 30, its width can be appropriately determined according to the size of the display area, the required design, etc. For example, it is preferably 1 mm or more and The range below 20 mm.

The thickness of the colored layer 40 is preferably 30 μm or less, and more preferably 25 μm or less. When the thickness of the colored layer 40 is within the above numerical range, bubbles generated at the interface with the bonding layer 20 can be suppressed. The thickness of the colored layer 40 may be, for example, 0.1 μm or more, preferably 3 μm or more. When the thickness of the colored layer 40 is 0.1 μm or more, the colored layer 40 is easy to be recognized, and it contributes to the improvement of designability, and also helps to increase the optical density.

FIG. 1 illustrates an example in which the thickness of the colored layer 40 is uniform and the cross-sectional shape is rectangular. However, the thickness of the colored layer 40 may not be uniform. For example, it may be a cross-sectional shape having an inclined portion whose thickness becomes thinner toward the inside. By having an inclined portion, it is possible to suppress the entrapment of air that is easily generated during lamination. When the thickness of the colored layer 40 is not uniform, the numerical range described above as the thickness of the colored layer 40 is set as the maximum thickness of the colored layer 40.

(First embodiment) Fig. 2 is a schematic cross-sectional view of the laminate according to the first embodiment of the present invention. The laminate 101 includes a front panel 11, a bonding layer 20, a plate-shaped body 31 and a coloring layer 40. In FIG. 2, the colored layer 40 is partially formed on the surface of the plate-like body 31 on the side of the bonding layer 20, but the colored layer 40 may also be partially formed on the surface of the front panel 11 on the side of the bonding layer 20. In this embodiment, the front panel 11 corresponds to the first optical member, and the plate-shaped body 31 corresponds to the second optical member.

(Second embodiment) Fig. 3 is a schematic cross-sectional view of a laminate according to a second embodiment of the present invention. The laminate 102 includes a front panel 11, a bonding layer 20, a plate-shaped body 31, a polarizing plate 32, a retardation film 33, a touch-sensing panel 34 and a coloring layer 40. In FIG. 3, the colored layer 40 is partially formed on the surface of the plate-like body 31 on the side of the bonding layer 20, but the colored layer 40 may also be partially formed on the surface of the front panel 11 on the side of the bonding layer 20. In the present embodiment, the front panel 11 corresponds to the first optical member, and the structure from the plate-shaped body 31 to the touch sensing panel 34 corresponds to the second optical member.

(Third Embodiment) Fig. 4 is a schematic cross-sectional view of a laminate according to a third embodiment of the present invention. The laminate 103 includes a glass plate 12, a bonding layer 20, a plate-shaped body 31, a polarizing plate 32, a retardation film 33, a touch sensing panel 34, a plate-shaped body 35, a plate-shaped body 36, and a coloring layer 40. In FIG. 4, the colored layer 40 is partially formed on the surface of the plate-like body 31 on the side of the bonding layer 20, but the colored layer 40 may also be partially formed on the surface of the glass plate 12 on the side of the bonding layer 20. In this embodiment, the glass plate 12 corresponds to the first optical member, and the structure from the plate-shaped body 31 to the plate-shaped body 36 corresponds to the second optical member.

<Manufacturing method of laminate> 5 is a cross-sectional view schematically showing a method for manufacturing a laminate according to another embodiment of the present invention. The manufacturing method of the laminate includes: a preparation step which prepares the first optical member 10 and the second optical member 30 (FIG. 5(a)); a colored layer forming step which is attached to the first optical member 10 or the second optical member A coloring layer 40 is partially formed on the surface of one of 30 (FIG. 5(b)); and a bonding step, which is to bond the first optical member 10 to the coloring layer of the second optical member 30 via the bonding layer 20 The surface on the 40 side (Figure 5(c)).

In the colored layer forming step, the colored layer 40 is formed on the surface of the second optical member 30, and in the bonding step, when the first optical member 10 and the second optical member 30 are bonded, the above formula (1) is satisfied, Thereby, it is possible to suppress the generation of a step difference on the surface of the first optical member, and it is not easy to distort the reflected image viewed on the surface.

In FIG. 5, in the colored layer forming step, the colored layer 40 is partially formed on the surface on the side of the second optical member 30, but the colored layer 40 may also be partially formed on one of the first optical member 10 On the surface of the side.

<Display device> The display device is not particularly limited, and examples include organic electroluminescence (organic EL) display devices, inorganic electroluminescence (inorganic EL) display devices, liquid crystal display devices, touch panel display devices, electroluminescence display devices, etc. . The display device of this embodiment has the laminate 100 that can be bent, and therefore can be preferably used for a flexible display device, and particularly preferably for an organic EL display device. [Example]

<Method for measuring thickness> Use a laser cutter to cut the laminate. Using a transmission electron microscope (SU8010; Horiba Manufacturing Co., Ltd.), the cross section of the cut laminate was observed, and the thickness of each layer was measured from the obtained observation image.

<Method of measuring elastic modulus> The elastic modulus of each layer constituting the optical member is measured as follows. From the components constituting each layer, use a super cutter to cut rectangular pieces of 110 mm long side × 10 mm short side. Next, using a tensile tester [Autograph AG-Xplus test machine manufactured by Shimadzu Corporation], the upper and lower clamps were sandwiched so that the distance between the clamps became 5 cm, and the two ends of the measurement sample in the longitudinal direction were sandwiched. In an environment with a temperature of 23°C and a relative humidity of 55%, the measurement sample is stretched in the longitudinal direction of the measurement sample at a tensile speed of 4 mm/min, from 20 to 40 MPa in the obtained stress-strain curve The slope of the straight line calculates the tensile modulus of elasticity [MPa] at a temperature of 23°C and a relative humidity of 55%. At this time, as the thickness for calculating the stress, the thickness value of each layer measured as described above is used.

<Method of step measurement> An interference microscope (Contour GT by Bruker) was used to measure the step difference at the boundary between the portion where the colored layer was formed and the portion where the colored layer was not formed.

<Reflection image evaluation method> Check whether the reflected image of the fluorescent lamp visually recognized on the surface of the first optical member of the laminate under the fluorescent lamp is distorted. ○: No distortion ×: There is distortion

<Bendability Test> For the laminates obtained in the examples and comparative examples, a bending evaluation device (STS-VRT-500 manufactured by Science Town) was used to perform an evaluation test to confirm the durability of the bending. FIG. 6 is a diagram schematically showing the method of this evaluation test. As shown in FIG. 6, the two mounting tables 501 and 502 that can be moved individually are arranged so that the gap C becomes 5.0 mm (2.5 R), and the laminated body 100 is fixed so that the center in the width direction is positioned at the center of the gap C And the configuration (Figure 6(a)). At this time, the laminate 100 is arranged so that the front panel (first optical member 10) is upward. Then, using the position P1 and the position P2 as the center of the rotation axis, the two mounting tables 501, 502 are rotated upward by 90 degrees, and a bending force is added to the area of the laminate 100 corresponding to the gap C of the mounting table (FIG. 6(b )). Thereafter, the two mounting tables 501 and 502 are moved back to their original positions (FIG. 6(a)). After completing the above series of operations, the additional number of bending forces is counted as 1. For the cumulative number of additional bending forces, confirm whether bubbles or cracks have occurred in the area of the laminate 100 corresponding to the gap C of the mounting tables 501, 502. Stop the additional bending forces at the time when the bubbles or bursts occur, according to the following criteria to evaluate. The evaluation results are shown in Table 1. The movement speed of the mounting tables 501 and 502 and the additional speed of the bending force are set to the same condition in the evaluation test of any laminate. A: Even if the additional frequency of the bending force reaches 10,000, no bubbles or cracks are generated; B: When the additional frequency of bending force is more than 7 thousand and less than 10,000, bubbles or cracks are generated; C: When the additional frequency of the bending force is more than 0.5 thousand and less than 7 thousand, bubbles or cracks are generated; D: When the additional frequency of the bending force is more than 2,000 and less than 5,000, bubbles or cracks are generated; E: When the additional frequency of the bending force is less than 22,000, bubbles or cracks are generated.

<Preparation of the composition for forming a colored layer (black)> [Ink composition] Acetylene black 15% by mass Polyester 75% by mass Dimethyl glutarate 2.5% by mass Succinic acid 2% by mass Isophorone 5.5% by mass [hardener] Aliphatic polyisocyanate 75% by mass Ethyl acetate 25% by mass [Solvent] Isophorone [Preparation] To 100 parts by mass of the ink component, 10 parts by mass of a hardener and 10 parts by mass of a solvent were added and stirred to obtain a composition (black) for forming a colored layer.

<Preparation of the composition for forming a colored layer (white)> [Ink composition] Titanium dioxide 50% by mass Polyester 39% by mass Dimethyl glutarate 2.5% by mass Succinic acid 2% by mass Isophorone 6.5 mass% [hardener] Aliphatic polyisocyanate 75% by mass Ethyl acetate 25% by mass [Solvent] Isophorone [Preparation] To 100 parts by mass of the ink component, 10 parts by mass of a hardener and 10 parts by mass of a solvent were added and stirred to obtain a composition (white) for forming a colorant-containing layer.

<First Optical Member>

[1st optical member A] Front panel with hard coating formed on both sides of the base film: thickness 70 μm, elastic modulus 3457 MPa, length 177 mm×width 105 mm Substrate film: 50 μm thick, polyimide (PI) resin film Hard coating layer: 10 μm thick, a layer formed from a composition containing a dendrimer compound having a polyfunctional acryl group at the end

[1st optical member B] Glass plate: thickness 70 μm, elastic modulus 68,000 MPa, SCHOTT

[1st optical member C] Before the hard coat layer is formed on one side of the substrate film: thickness 50 μm, elastic modulus 4091 MPa Base film: thickness 40 μm, triacetyl cellulose resin film Hard coating: thickness 10 μm

<Second optical member>

[Second optical member A] Triacetyl cellulose-based resin film (TAC): thickness 25 μm, elastic modulus 3282 MPa, Konica Minolta

[Second optical member B] Polyimide resin film (PI): thickness 25 μm, elastic modulus 3900 MPa, WON IMC

[Second optical member C] Triacetyl cellulose resin film (TAC): thickness 60 μm, elastic modulus 3282 MPa, Konica Minolta

[Second optical member D] The laminated body obtained by sequentially stacking TAC/polarizing element/retardation film/touch sensing panel has a thickness of 102.5 μm, a length of 177 mm×a width of 105 mm TAC: thickness 25 μm, elastic modulus 3282 MPa, Konica Minolta Polarizing element: thickness 2.5 μm, elastic modulus 937 MPa Phase difference film: thickness 17 μm, layer composition: overcoat layer (hardened layer of acrylic resin composition, thickness 1 μm, elastic modulus 4,510 MPa)/adhesive layer (thickness 5 μm, elastic modulus 0.11 MPa)/ Λ/4 plate (thickness 3 μm, elastic modulus 1,624 MPa) containing a layer hardened by a liquid crystal compound and an alignment film/adhesive layer (thickness 5 μm, elastic modulus 0.11 MPa)/containing hardened liquid crystal compound C-plate with layer and alignment film (thickness 3 μm, elastic modulus 2,039 MPa)/adhesive layer (thickness 25 μm, elastic modulus 0.63 MPa) Touch sensing panel: thickness 33 μm, layer structure: laminate of hardened layers of touch sensing pattern (ITO (Indium Tin Oxides) and acrylic resin composition, thickness 7 μm, elastic modulus 4,510 MPa)/adhesive layer (thickness 3 μm, elastic modulus 12,309 MPa)/cyclic olefin resin film (thickness 23 μm, elastic modulus 1,785 MPa)

The second optical member D is produced as follows. First, after forming a photo-alignment film on a base material, a composition containing a dichroic dye and a polymerizable liquid crystal compound is applied to the base material, which is aligned and hardened to obtain a polarizing element with a thickness of 2 μm. A film of triacetyl cellulose (TAC) with a thickness of 25 μm was attached to the polarizing element via an adhesive layer. The base material was peeled off, and a hardened layer of an acrylic resin composition with a thickness of 1 μm was formed on the exposed surface as an overcoat layer. Furthermore, a retardation film containing a layer formed by polymerizing and hardening a liquid crystal compound (a λ/4 plate containing a layer hardened by a liquid crystal compound and an alignment film (thickness 3 μm)/ Adhesive layer (thickness 5 μm)/positive C plate (thickness 3 μm) containing a layer hardened by a liquid crystal compound and an alignment film). Next, the second optical member D is obtained by laminating the touch sensing panel on the surface of the retardation film side through the adhesive layer.

[Second optical member E] The second optical member D/adhesive layer/PI1/adhesive layer/PI2 is laminated in this order. PI1: Polyimide resin film (PI), thickness 38 μm, elastic modulus 4,865 MPa, Kolon Corporation PI2: Polyimide resin film (PI), thickness 50 μm, elastic modulus 5,800 MPa, Kolon Corporation The surface of the second optical member D obtained as described above on the touch sensing panel side is bonded to PI1 via an adhesive layer. As the adhesive layer, a thickness of 25 μm and a storage elastic modulus of 0.63 MPa are used. Thereafter, PI2 was bonded to the surface on the PI1 side through the same adhesive layer to obtain a second optical member E.

[Second optical member F] Glass plate: thickness 70 μm, elastic modulus 68,000 MPa, SCHOTT

[Second optical member G] Triacetyl cellulose-based resin film (TAC): thickness 40 μm, elastic modulus 3282 MPa, Konica Minolta

<laminated layer> (Meth)acrylic adhesive layer, thickness 25 μm, length 177 mm×width 105 mm

<Example 1> On the surface of the front panel (first optical member A), using the above-prepared coloring agent-containing layer forming composition (black) as ink, using a 460 mesh screen, and drying twice by screen printing The printing with a coating thickness of 3 μm and a black printing layer with a thickness of 6 μm and a width of 5 mm is formed on the entire circumference of the peripheral portion. In the same area as the black printed layer, the coloring layer forming composition (white) prepared above was used as ink, and printing was repeated by screen printing over three times and the coating thickness was 5 μm.

Corona treatment is performed on the bonding surface of the TAC (second optical member A) to the bonding layer and the bonding surface of the bonding layer to the TAC. Then, TAC and the adhesive layer are bonded together to obtain a TAC with a bonding layer.

Thereafter, the surface of the front panel where the colored layer is formed and the surface of the adhesive layer of the TAC with the adhesive layer are subjected to corona treatment, and the front panel is attached to the attached layer so that the surface subjected to the corona treatment becomes inside The TAC layers of the layers were laminated using a roll bonding machine and cured in an autoclave to obtain the layered body of Example 1. Step measurement, reflection image evaluation and bendability test were performed on the obtained laminate. The results are shown in Table 1.

<Example 2> Except for using the second optical member B instead of using the second optical member A in Example 1, the same operation as in Example 1 was performed to produce the laminate of Example 2. The results are shown in Table 1.

<Example 3> The second optical member C was used instead of using the second optical member A in Example 1, except that the same operation as in Example 1 was carried out to produce a laminate of Example 3. The results are shown in Table 1.

<Example 4> The second optical member D was used instead of using the second optical member A in Example 1, except that the same operation as in Example 1 was performed to produce a laminate of Example 4. The results are shown in Table 1.

<Example 5> The first optical member B and the second optical member E were used instead of using the first optical member A and the second optical member A in Example 1, except that the same operation as in Example 1 was performed to produce a laminate of Example 5. body. However, no bendability test was conducted. The results are shown in Table 1.

<Example 6> The first optical member C was used instead of using the first optical member A in Example 1, and printing using the colored layer forming composition (white) as ink was not performed, except that the same operation as in Example 1 was performed. The laminate of Example 6 was produced. The results are shown in Table 1.

<Example 7> The second optical member G was used instead of using the second optical member A in Example 6, except that the same operation as in Example 6 was performed to produce a laminate of Example 7. The results are shown in Table 1.

<Comparative Example 1> Except for using the second optical member E instead of using the second optical member A in Example 1, the same operation as in Example 1 was performed to produce a laminate of Comparative Example 1. The results are shown in Table 1.

<Comparative example 2> Except for using the second optical member F instead of using the second optical member A in Example 1, the same operation as in Example 1 was performed to produce a laminate of Comparative Example 2. However, no bendability test was conducted. The results are shown in Table 1.

<Example 8> Corona treatment is applied to the bonding surface of the front panel (first optical member A) to the bonding layer and the bonding surface of the bonding layer to the front panel. Then, the front panel and the adhesive layer are bonded together to obtain a front panel with a bonding layer.

On the surface of TAC (second optical member A), using the above-prepared coloring agent-containing composition for layer formation (black) as ink, using a 460 mesh screen, the coating was dried twice by screen printing The printing with a cloth thickness of 3 μm and a black printing layer with a thickness of 6 μm and a width of 5 mm is formed on the entire circumference of the peripheral portion. In the same area as the black printed layer, the composition for coloring layer formation (white) prepared as described above was used as ink, and the coating thickness was repeatedly dried by screen printing three times, and the coating thickness was 5 μm.

Thereafter, corona treatment is applied to the surface of the bonding layer of the panel before the adhesive layer and the surface of the TAC on which the colored layer is formed, so that the surface of the panel before the bonding layer is The TAC laminate was laminated using a roll bonding machine and cured in an autoclave to obtain the laminate of Example 8. Step measurement, reflection image evaluation and bendability test were performed on the obtained laminate. The results are shown in Table 2.

<Example 9> The second optical member B was used instead of using the second optical member A in Example 8. Except that the second optical member A was used, the same operation as in Example 8 was carried out to produce the laminate of Example 9. The results are shown in Table 2.

<Example 10> Except for using the second optical member C instead of using the second optical member A in Example 8, the same operation as in Example 8 was carried out to produce a laminate of Example 10. The results are shown in Table 2.

<Example 11> The second optical member D was used instead of using the second optical member A in Example 8. Except that the second optical member A was used, the same operation as in Example 8 was carried out to produce the laminate of Example 11. The results are shown in Table 2.

<Example 12> The first optical member B and the second optical member E were used instead of using the first optical member A and the second optical member A in Example 8, except that the same operation as in Example 8 was performed to produce the laminate of Example 12. body. However, no bendability test was conducted. The results are shown in Table 2.

<Comparative Example 3> Except for using the second optical member E instead of using the second optical member A in Example 8, the same operation as in Example 8 was performed to produce a laminate of Comparative Example 3. The results are shown in Table 2.

<Comparative Example 4> Except for using the second optical member F instead of using the second optical member A in Example 8, the same operation as in Example 8 was performed to produce a laminate of Comparative Example 4. However, no bendability test was conducted. The results are shown in Table 2.

[Table 1]

[Table 2]

10: The first optical component 11: Front panel 12: Glass plate 20: Laminated layer 30: Second optical component 31: Plate-like body 32: polarizer 33: retardation film 34: Touch sensing panel 35: Plate-like body 36: Plate 40: Colored layer 100: laminate 101: laminate 102: laminate 103: laminate 501: Mounting table 502: Mounting table

FIG. 1 is a schematic cross-sectional view of a laminate according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of the laminate according to the first embodiment of the present invention. Fig. 3 is a schematic cross-sectional view of a laminate according to a second embodiment of the present invention. Fig. 4 is a schematic cross-sectional view of a laminate according to a third embodiment of the present invention. 5(a) to (c) are cross-sectional views schematically showing an example of the method for manufacturing the laminate of the present invention. 6(a) and (b) are diagrams schematically showing the evaluation test method in the examples.

10: The first optical component

20: Laminated layer

30: Second optical component

40: Colored layer

100: laminate

Claims (9)

A laminate including a first optical member including at least one layer, a bonding layer, and a second optical member including at least one layer, and further including a first optical member or a second optical member partially formed The coloring layer on the surface of the member on the bonding layer side, the first optical member is disposed on the viewing side of the laminate more than the second optical member, and satisfies the following formula (1), S _Pa > S _Pb (1 ) [In the formula, S _Pa represents the sum of the product P _a of the elastic modulus E _a and the thickness t _a of each layer constituting the first optical member, and S _Pb represents the elastic modulus E _b and the thickness of each layer of the second optical member The sum of the products of t _b and P _b ]. The laminate according to claim 1, wherein the first optical member is a front panel, and the front panel includes a resin film. The laminated body according to claim 1, wherein the second optical member includes at least one selected from the group consisting of a touch sensing panel and a polarizing plate. The laminate according to claim 2, wherein the second optical member includes at least one selected from the group consisting of a touch sensing panel and a polarizing plate. The laminate according to any one of claims 1 to 4, wherein the colored layer is partially formed on the surface of the second optical member on the bonding layer side. The laminated body according to any one of claims 1 to 4, wherein the thickness of the above-mentioned colored layer is 0.1 μm or more and 30 μm or less. The laminate according to claim 5, wherein the thickness of the above-mentioned colored layer is 0.1 μm or more and 30 μm or less. A display device comprising the layered body according to any one of claims 1 to 7. A method for manufacturing a laminate, which is a method for manufacturing a laminate as claimed in any one of claims 1 to 7, and includes: A preparation step, which is to prepare the first optical member and the second optical member; A colored layer forming step, which is to partially form a colored layer on the surface of one of the first optical member or the second optical member; and In the bonding step, the first optical member and the second optical member are bonded via a bonding layer.

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