Elongated laminate, polarizing plate, composite lens, display device, and virtual-reality display device

Abstract

The present invention addresses the problem of providing: an elongated laminate that can ensure a satisfactory effective width when polarizing plates (particularly for virtual-reality display device applications) are produced in small batches; a polarizing plate; a composite lens; a display device; and a virtual-reality display device. The elongated laminate according to the present invention comprises a support, an alignment film, a light absorption anisotropic film, and a first resin layer in this order, in which the light absorption anisotropic film contains a liquid crystal compound and a dichroic substance and, when the film thickness of the first resin layer is measured every 5 m in the longitudinal direction, 90% or more of all the measurement points satisfy the following condition.　Condition: The maximum film thickness value at positions of 5-20 mm from both ends in the transverse direction is within the range of 90-110% of the average film thickness value at the center portion in the transverse direction.

Description

Long laminate, polarizing plate, composite lens, display device, and virtual reality display device

[0001] The present invention relates to a long laminate, a polarizing plate, a composite lens, a display device, and a virtual reality display device.

[0002] A light absorption anisotropic film containing a dichroic substance is used in various applications. For example, it is used for preventing reflection of external light as a circular polarizing plate by combining a light absorption anisotropic film and a retardation layer (optically anisotropic layer). It is also used as a part of a virtual reality display device.

[0003] For example, in Patent Document 1, "a light absorption anisotropic film containing a dichroic substance, in which the degree of polarization A measured by incident light from one surface of the light absorption anisotropic film and the degree of polarization B measured by incident light from the other surface of the light absorption anisotropic film are different" is disclosed ([Claim 1]), and a laminate having a support, an alignment film, a light absorption anisotropic film, and an oxygen barrier layer (resin layer) in this order is disclosed (see [Example 1], etc.).

[0004] International Publication No. 2022 / 202470

[0005] The inventors of the present invention produced a laminate having a support, an alignment film, a light absorption anisotropic film, and a resin layer in this order as described in Patent Document 1 in a long form, and when considering an embodiment of producing a polarizing plate (particularly for use in a virtual reality display device) by dividing a part of the produced long laminate, it was found that color deterioration may be observed at the end in the short side (width) direction of the long laminate, and it was clarified that there is room to widen the effective width of the long laminate.

[0006] Therefore, an object of the present invention is to provide a long laminate that can ensure a good effective width when producing a polarizing plate (particularly for use in a virtual reality display device) by dividing, as well as a polarizing plate, a composite lens, a display device, and a virtual reality display device.<>

[0007] As a result of diligent research to achieve the above objectives, the inventors of the present invention have discovered that a long laminate, manufactured with a resin layer thickness that satisfies predetermined conditions, can secure a good effective width when divided into smaller pieces to manufacture polarizing plates (particularly for virtual reality display applications), and have completed the present invention. In other words, the inventors of the present invention have found that the above objectives can be solved by the following configuration.

[0008] [1] A long laminate having a support, an alignment film, a light-absorbing anisotropic film, and a first resin layer in this order, wherein the light-absorbing anisotropic film contains a liquid crystal compound and a dichroic substance, and when the thickness of the first resin layer is measured in 5 m increments along the longitudinal direction, 90% or more of the measurement points satisfy the following condition: Condition: The maximum thickness at positions 5 to 20 mm from both ends in the short direction is within the range of 90 to 110% of the average thickness in the center of the short direction. [2] The long laminate according to [1], further comprising a second resin layer between the support and the alignment film, wherein when the thickness of the second resin layer is measured in 5 m increments along the longitudinal direction, 90% or more of the measurement points satisfy the above condition. [3] The long laminate according to [1] or [2], wherein the average thickness of the first resin layer is 0.2 to 0.8 μm. [4] A long laminate according to any one of [1] to [3], wherein the first resin layer contains surfactants S-1 and S-2 which have different structures or molecular weights from each other. [5] A long laminate according to [4], wherein the weight-average molecular weight of surfactant S-1 is 600 or more and the weight-average molecular weight of surfactant S-2 is less than 600. [6] A long laminate according to [4] or [5], wherein both surfactant S-1 and surfactant S-2 are non-fluorinated surfactants. [7] A long laminate according to any one of [4] to [6], wherein at least one of surfactant S-1 and surfactant S-2 is a silicone-based surfactant. [8] A long laminate according to any one of [1] to [7], wherein the first resin layer contains polyvinyl alcohol. [9] A long laminate according to [5], wherein the content of surfactant S-1 is 1% by mass or less with respect to the total mass of the first resin layer.

[10] The long laminate according to [5], wherein when the content of surfactant S-1 and the content of surfactant S-2 are compared in mass % relative to the total mass of the first resin layer, the following formula (1) is satisfied: Content of S-1 ≥ Content of S-2 (1)

[11] A polarizing plate having a laminate obtained by cutting the long laminate according to any of [1] to

[10] .

[12] A composite lens comprising a laminate obtained by cutting the long laminate according to any of [1] to

[10] , a lens, and a half mirror in this order.

[13] A display device having a laminate obtained by cutting a long laminate according to any one of [1] to

[10] .

[14] A virtual reality display device having a laminate obtained by cutting a long laminate according to any one of [1] to

[10] .

[0009] According to the present invention, it is possible to provide a long laminate that can secure a good effective width when manufacturing polarizing plates (particularly for use in virtual reality display devices) in small quantities, as well as polarizing plates, composite lenses, display devices, and virtual reality display devices.

[0010] This figure shows an example of a long laminate of the present invention. This figure shows another example of a long laminate of the present invention. This figure shows another example of a long laminate of the present invention. This figure shows another example of a long laminate of the present invention. This figure shows an example of a composite lens of the present invention. This figure shows an example of a virtual reality display device of the present invention.

[0011] The present invention will now be described in detail. The following descriptions of constituent elements may be based on representative embodiments of the present invention, but the present invention is not limited to such embodiments. In this specification, numerical ranges expressed using "~" mean ranges that include the numbers written before and after "~" as the lower and upper limits. In this specification, an upper or lower limit stated in a numerical range described in steps may be replaced with an upper or lower limit in another numerical range described in steps. In addition, an upper or lower limit stated in a numerical range described in this specification may be replaced with a value shown in the examples. In this specification, each component may be made by using one substance alone or by using two or more substances in combination. Here, when two or more substances are used in combination for each component, the content for that component refers to the total content of the substances used in combination, unless otherwise specified.

[0012] In this specification, the "absorption axis" refers to the polarization direction in which the absorbance is maximum when linearly polarized light is incident on the element. The "in-plane lagging axis" refers to the direction in which the refractive index is maximum.

[0013] In this specification, Re(λ) and Rth(λ) represent the in-plane retardation and thickness retardation at wavelength λ, respectively. Unless otherwise specified, wavelength λ is assumed to be 550 nm. Furthermore, in this specification, Re(λ) and Rth(λ) are values ​​measured at wavelength λ using an AxoScan (manufactured by Axometrics). Specifically, by inputting the average refractive index ((nx + ny + nz) / 3) and film thickness (d) into the AxoScan, the following can be calculated: In-plane retardation axis direction (°) Re(λ) = R0(λ) Rth(λ) = ((nx + ny) / 2 - nz) × d Note that R0(λ) is displayed as a numerical value calculated by the AxoScan, but it means Re(λ).

[0014] In this specification, the refractive indices nx, ny, and nz are measured using an Abbe refractometer (NAR-4T, manufactured by Atago Corporation) with a sodium lamp (λ = 589 nm) as the light source. Wavelength dependence can be measured using a multi-wavelength Abbe refractometer DR-M2 (manufactured by Atago Corporation) in combination with an interference filter. Values ​​from the Polymer Handbook (JOHN WILEY & SONS, INC.) and catalogs of various optical films can also be used. Examples of average refractive index values ​​for major optical films are given below: cellulose acylate (1.48), cycloolefin polymer (1.52), polycarbonate (1.59), polymethyl methacrylate (1.49), and polystyrene (1.59).

[0015] In this specification, A plates and C plates are defined as follows: There are two types of A plates: positive A plates and negative A plates. When the refractive index in the in-plane slow axis direction (the direction in which the refractive index is maximum in the plane) of the film is nx, the refractive index in the direction perpendicular to the in-plane slow axis is ny, and the refractive index in the thickness direction is nz, a positive A plate satisfies the relationship given by equation (A1), and a negative A plate satisfies the relationship given by equation (A2). Note that a positive A plate has a positive Rth value, and a negative A plate has a negative Rth value. Equation (A1) nx > ny ≈ nz Equation (A2) ny < nx ≈ nz Note that the above "≈" includes not only cases where the two are completely identical, but also cases where the two are substantially identical. "Substantially identical" means, for example, that when (ny - nz) × d (where d is the film thickness) is -10 to 10 nm, preferably -5 to 5 nm, it is included in "ny ≈ nz", and when (nx - nz) × d is -10 to 10 nm, preferably -5 to 5 nm, it is included in "nx ≈ nz". There are two types of C plates: positive C plates and negative C plates. A positive C plate satisfies the relationship in equation (C1), and a negative C plate satisfies the relationship in equation (C2). Note that a positive C plate shows a negative Rth value, and a negative C plate shows a positive Rth value. Equation (C1) nz > nx ≈ ny Equation (C2) nz < nx ≈ ny Note that the above "≈" includes not only cases where the two are completely identical, but also cases where the two are substantially identical. "Substantially identical" means that, for example, when (nx - ny) × d (where d is the thickness of the film) is 0 to 10 nm, preferably 0 to 5 nm, it is included in "nx ≈ ny".

[0016] [Long Laminate] The long laminate of the present invention is a long laminate having a support, an alignment film, a light-absorbing anisotropic film, and a first resin layer in this order. Furthermore, the light-absorbing anisotropic film of the long laminate of the present invention contains a liquid crystal compound and a dichroic substance. Moreover, when the thickness of the first resin layer of the long laminate of the present invention is measured in 5m increments along the longitudinal direction, more than 90% of the measurement points satisfy the following condition: Condition: The maximum thickness of the film at positions 5 to 20 mm from both ends in the short direction is within the range of 90 to 110% of the average thickness of the film in the center of the short direction.

[0017] Here, the various film thicknesses in the first resin layer and the second resin layer (described later) are measured by the following method.

[0018] (1) Maximum film thickness at positions 5 to 20 mm from both ends in the short direction The maximum film thickness at positions 5 to 20 mm from both ends in the short direction of the first resin layer of the long laminate of the present invention, i.e., the long resin layer, is determined by using a micro-spectrometer (e.g., OPTM manufactured by Otsuka Electronics) to measure the film thickness at positions 5 mm to 20 mm from the edge of the layer at 1 mm intervals for each end in the short direction, and then determining the maximum value. Alternatively, the maximum film thickness at positions 5 to 20 mm from both ends in the short direction can also be measured by cutting the first resin layer in the short direction with a microtome and measuring the exposed cross-section using a scanning electron microscope (SEM).

[0019] (2) Average value of film thickness in the center in the short direction The "average value of film thickness in the center in the short direction" of the first resin layer, i.e., the elongated resin layer, of the long laminate of the present invention is measured using a micro-spectrometer (for example, OPTM manufactured by Otsuka Electronics) to measure the film thickness at three points: the center in the short direction and at a distance of ±20 mm in the short direction from there, and calculate the average value of these measurements. Alternatively, the "average value of film thickness in the center in the short direction" can also be measured using a SEM from the exposed cross-section after cutting the first resin layer in the short direction with a microtome.

[0020] (3) Average value of film thickness The "average value of film thickness" in the first resin layer of the long laminate of the present invention, that is, in the long resin layer, refers to the average value of the average values ​​obtained by measuring the "average value of film thickness at the center in the short direction" as shown in (2) above in 5 m increments along the longitudinal direction.

[0021] In the present invention, as described above, a laminate having a first resin layer in which, when the film thickness is measured in 5m increments along the longitudinal direction, 90% or more of the measurement points satisfy the above conditions can secure a good effective width when the laminate is divided into smaller portions to produce polarizing plates. The details of the reason for this are not yet clear, but the inventors speculate that it is due to the following reason. That is, because the film thickness of the first resin layer satisfies the above conditions, when producing polarizing plates (especially for virtual reality display applications) (especially during curved surface molding), the non-uniform stretching of the first resin layer is suppressed, and as a result, color degradation at the short-side edges of the long laminate is suppressed, thus securing a good effective width.

[0022] Figures 1 and 2 show an example of a long laminate of the present invention. As shown in Figure 1, the long laminate 10 has a long support 11, an alignment film 12, a light-absorbing anisotropic film 13, and a first resin layer 14 in that order. As shown in Figure 2, the long laminate 20 has not only a long support 11, an alignment film 12, a light-absorbing anisotropic film 13, and a first resin layer 14, but also a second resin layer 15 between the long support 11 and the alignment film 12.

[0023] The length (longitudinal direction) and width (short direction) of the long laminate of the present invention are not particularly limited as long as they are of a size that allows for the determination of whether or not the above conditions relating to the first resin layer are met. For example, the length is preferably 10 m or more, and the width is preferably 10 cm or more. The upper limits are not particularly limited, but the upper limit of the length is preferably 10,000 m or less, and the upper limit of the width is preferably 200 cm or less. The same applies to the length (longitudinal direction) and width (short direction) of the support, orientation film, light absorption anisotropy film, and first resin layer, as well as any other components (second resin layer, phase difference layer, etc.) described later, in the long laminate of the present invention.

[0024] The following provides a detailed description of each component of the long laminated structure.

[0025] [Support] The long laminate of the present invention has a support. Such a support is preferably transparent. In this invention, "transparent" means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more.

[0026] As the above-mentioned support, polymer films are preferred, for example. Examples of polymer film materials include cellulose polymers; acrylic polymers having acrylic acid ester polymers such as polymethyl methacrylate and lactone ring-containing polymers; thermoplastic norbornene polymers; polycarbonate polymers; polyester polymers such as polyethylene terephthalate and polyethylene naphthalate; styrene polymers such as polystyrene and acrylonitrile-styrene copolymer (AS resin); polyolefin polymers such as polyethylene, polypropylene, and ethylene-propylene copolymer; vinyl chloride polymers; amide polymers such as nylon and aromatic polyamides; imide polymers; sulfone polymers; polyethersulfone polymers; polyetheretherketone polymers; polyphenylene sulfide polymers; vinylidene chloride polymers; vinyl alcohol polymers; vinyl butyral polymers; arylate polymers; polyoxymethylene polymers; epoxy polymers; and polymers obtained by mixing these polymers.

[0027] The above-mentioned support preferably has a small phase difference. Specifically, the in-plane retardation at a wavelength of 550 nm is preferably 10 nm or less, and the absolute value of the retardation in the thickness direction at a wavelength of 550 nm is preferably 50 nm or less.

[0028] The above-mentioned support is not limited to the polymer film, as long as it has the mechanical strength to support the long laminate; for example, a phase difference layer, as described later, may also be used.

[0029] The thickness of the support is not particularly limited, but is preferably 5 to 300 μm, and more preferably 5 to 100 μm.

[0030] [Alignment Layer] The long laminate of the present invention has an alignment layer. Here, the alignment layer can be any layer as long as it can bring the liquid crystal compound and dichroic substance into a desired orientation state on the alignment layer. Methods for forming the alignment layer include, for example, rubbing treatment of the film surface with an organic compound (preferably a polymer), oblique deposition of an inorganic compound, formation of a layer having microgrooves, and accumulation of an organic compound (e.g., ω-tricosanoic acid, dioctadecylmethylammonium chloride, methyl stearylate, etc.) by the Langmuir-Bludget method (LB film). Furthermore, alignment layers that exhibit alignment function upon application of an electric field, magnetic field, or light irradiation are also known. Among these, in the present invention, an alignment layer formed by rubbing treatment is preferred from the viewpoint of ease of controlling the pre-tilt angle of the alignment layer, and a photo-alignment layer formed by light irradiation is also preferred from the viewpoint of uniformity of orientation.

[0031] <Rubbing-treated orientation film> Numerous polymer materials are described in various publications and many commercially available products can be used for orientation films formed by rubbing treatment. In the present invention, polyvinyl alcohol or polyimide, and their derivatives are preferably used. For information on orientation films, please refer to the description on pages 43, line 24 to 49, line 8 of International Publication No. 2001 / 88574A1.

[0032] <Photo-aligned film> Numerous publications describe photo-aligning compounds used in aligning films formed by light irradiation. In the present invention, for example, azo compounds described in Japanese Patent Publication No. 2006-285197, Japanese Patent Publication No. 2007-76839, Japanese Patent Publication No. 2007-138138, Japanese Patent Publication No. 2007-94071, Japanese Patent Publication No. 2007-121721, Japanese Patent Publication No. 2007-140465, Japanese Patent Publication No. 2007-156439, Japanese Patent Publication No. 2007-133184, Japanese Patent Publication No. 2009-109831, Japanese Patent No. 3883848, Japanese Patent No. 4151746, and Japanese Patent Publication No. 2002-229039 are used. Preferred examples include aromatic ester compounds, maleimides and / or alkenyl-substituted nadiimide compounds having photo-orienting units as described in Japanese Patent Publication No. 2002-265541 and Japanese Patent Publication No. 2002-317013, photocrosslinkable silane derivatives as described in Japanese Patent No. 4205195 and Japanese Patent No. 4205198, photocrosslinkable polyimides, polyamides or esters as described in Japanese Patent Publication No. 2003-520878 and Japanese Patent Publication No. 2004-529220, or photocrosslinkable polyimides, polyamides or esters as described in Japanese Patent No. 4162850. More preferably are azo compounds, photocrosslinkable polyimides, polyamides or esters.

[0033] Of these, it is preferable to use a photosensitive compound having a photo-oriented group that undergoes at least one of dimerization and isomerization upon the action of light as the photo-oriented compound. Examples of photo-oriented groups include groups having a cinnamic acid (cinnamoyl) structure (skeleton), a coumarin structure (skeleton), a chalcone structure (skeleton), a benzophenone structure (skeleton), and an anthracene structure (skeleton). Among these groups, groups having a cinnamoyl structure and groups having a coumarin structure are preferred, and groups having a cinnamoyl structure are more preferred.

[0034] Furthermore, the photosensitive compound having the above-mentioned photo-orienting group may also have a crosslinking group. Preferably, the crosslinking group is a thermally crosslinking group that undergoes a curing reaction upon the action of heat, or a photocrosslinking group that undergoes a curing reaction upon the action of light. A crosslinking group having both thermal and photocrosslinking properties may also be used. Examples of such crosslinking groups include epoxy groups, oxetanyl groups, and -NH-CH ２ At least one selected from the group consisting of -O-R (where R represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms), a group having an ethylenically unsaturated double bond, and a blocked isocyanate group is mentioned. Among these, epoxy groups, oxetanyl groups, and groups having an ethylenically unsaturated double bond are preferred. Note that a three-membered cyclic ether group is also called an epoxy group, and a four-membered cyclic ether group is also called an oxetanyl group. Specifically, examples of groups having an ethylenically unsaturated double bond include vinyl groups, allyl groups, styryl groups, acryloyl groups, and methacryloyl groups, with acryloyl groups or methacryloyl groups being preferred.

[0035] A photo-alignment film is manufactured by irradiating a photo-alignment film formed from the above materials with linearly polarized or unpolarized light. In this specification, "linearly polarized light irradiation" and "unpolarized light irradiation" refer to operations that cause a photoreaction in the photo-alignment material. The wavelength of light used varies depending on the photo-alignment material used and is not particularly limited as long as it is the wavelength necessary for the photoreaction. The peak wavelength of the light used for irradiation is preferably 200 nm to 700 nm, and ultraviolet light with a peak wavelength of 400 nm or less is more preferred.

[0036] Light sources used for light irradiation include commonly used light sources such as tungsten lamps, halogen lamps, xenon lamps, xenon flash lamps, mercury lamps, mercury xenon lamps, and carbon arc lamps; various lasers [e.g., semiconductor lasers, helium-neon lasers, argon ion lasers, helium-cadmium lasers, and YAG (yttrium aluminum garnet) lasers]; light-emitting diodes; and cathode ray tubes.

[0037] Methods for obtaining linearly polarized light include using polarizers (e.g., iodine polarizers, two-color dye polarizers, and wire grid polarizers), using prism-type elements (e.g., Grant-Thomson prisms) or reflective polarizers utilizing the Brewster angle, or using light emitted from a polarized laser light source. Alternatively, filters or wavelength conversion elements may be used to selectively irradiate only the light of the required wavelength.

[0038] When linearly polarized light is used, the light is irradiated onto the alignment film from the top or back surface, perpendicular or oblique to the surface of the alignment film. The angle of incidence of the light varies depending on the photo-alignment material, but is preferably 0 to 90° (perpendicular), and more preferably 40 to 90°. When unpolarized light is used, the alignment film is irradiated with unpolarized light from an oblique angle. The angle of incidence is preferably 10 to 80°, more preferably 20 to 60°, and even more preferably 30 to 50°. The irradiation time is preferably 1 to 60 minutes, and more preferably 1 to 10 minutes.

[0039] If patterning is required, a method can be employed in which light irradiation using a photomask is performed the number of times necessary to create the pattern, or a method can be employed in which the pattern is written by laser scanning.

[0040] The thickness of the orientation film is not particularly limited as long as it can perform the orientation function, but it is preferably 0.01 to 5.0 μm, and more preferably 0.05 to 2.0 μm.

[0041] [Light-absorbing anisotropic film] The long laminate of the present invention has a light-absorbing anisotropic film. Here, the light-absorbing anisotropic film can function as a linear polarizer that transmits linearly polarized light in a certain direction and absorbs linearly polarized light in a direction perpendicular to this linearly polarized light.

[0042] In the present invention, the light-absorbing anisotropic film is preferably a layer containing a liquid crystal compound and a dichroic substance, and is a layer in which the orientation state of the liquid crystal compound and the dichroic substance is fixed.

[0043] <Liquid Crystal Compound> As the liquid crystal compound, either a polymer liquid crystal compound or a low molecular weight liquid crystal compound can be used, and a polymer liquid crystal compound is preferred in terms of being able to achieve a high degree of orientation. Also, as the liquid crystal compound, a polymer liquid crystal compound and a low molecular weight liquid crystal compound may be used in combination. The liquid crystal compound may be fixed in the light absorption anisotropic film. Here, the "polymer liquid crystal compound" refers to a liquid crystal compound having a repeating unit in its chemical structure. Also, the "low molecular weight liquid crystal compound" refers to a liquid crystal compound having no repeating unit in its chemical structure.

[0044] The low molecular weight liquid crystal compound is not particularly limited. For example, a compound showing a nematic liquid crystal phase and a compound showing a smectic liquid crystal phase can be mentioned. In terms of enhancing the degree of orientation, a compound showing a smectic liquid crystal phase is preferred. For example, the liquid crystal compounds described in JP-A-2013-228706 can be mentioned.

[0045] As the polymer liquid crystal compound, for example, the thermotropic liquid crystalline polymer described in JP-A-2011-237513 can be mentioned. When the light absorption anisotropic film contains a polymer liquid crystal compound, the polymer liquid crystal compound preferably forms a nematic liquid crystal phase. The temperature range showing a nematic liquid crystal phase is preferably from room temperature (23°C) to 450°C, and more preferably from 50 to 400°C in terms of handling and manufacturing suitability.

[0046] The content of the liquid crystal compound contained in the light absorption anisotropic film is preferably 25 to 2000 parts by mass, more preferably 100 to 1300 parts by mass, and still more preferably 200 to 900 parts by mass with respect to 100 parts by mass of the content of the dichroic substance described later. When the content of the liquid crystal compound is within the above range, the degree of orientation of the dichroic substance is further improved. The liquid crystal compound may be contained alone or in combination of two or more. When two or more liquid crystal compounds are contained, the content of the above liquid crystal compound means the total content of the liquid crystal compounds.

[0047] <Dichroic Substances> Dichroic substances refer to dyes whose absorbance differs depending on the direction. Dichroic substances may or may not exhibit liquid crystalline properties. The light-absorbing anisotropic film may contain one type of dichroic substance or multiple types of dichroic substances. In particular, it is preferable to contain three or more types of dichroic substances, and more preferably four or more types. There is no particular upper limit to the number of types of dichroic substances contained in the light-absorbing anisotropic film, but six or fewer types are preferred.

[0048] Dichroic azo dye compounds are preferred as the dichroic substance. Dichroic azo dye compounds refer to azo dye compounds whose absorbance differs depending on the direction. Dichroic azo dye compounds may or may not exhibit liquid crystalline properties. If a dichroic azo dye compound exhibits liquid crystalline properties, it may exhibit either nematic or smectic properties. The temperature range in which the liquid crystalline phase is exhibited is preferably room temperature (about 20 to 28°C) to 300°C, and more preferably 50 to 200°C from the viewpoint of handling and manufacturing suitability.

[0049] In the present invention, from the viewpoint of color adjustment, it is preferable to use at least one dye compound having a maximum absorption wavelength in the range of 560 to 700 nm (hereinafter also referred to as the "first dichroic azo dye compound") and at least one dye compound having a maximum absorption wavelength in the range of 455 nm or more and less than 560 nm (hereinafter also referred to as the "second dichroic azo dye compound").

[0050] In the present invention, three or more dichroic azo dye compounds may be used in combination. For example, from the viewpoint of making the absorption polarizer closer to black, it is preferable to use a first dichroic azo dye compound, a second dichroic azo dye compound, and at least one dye compound having a maximum absorption wavelength in the range of 380 nm to less than 455 nm (hereinafter also abbreviated as "third dichroic azo dye compound"). In particular, it is preferable to use at least one first dichroic azo dye compound, at least one second dichroic azo dye compound, and at least one third dichroic azo dye compound, and to use a total of four or more first, second, and third dichroic azo dye compounds.

[0051] Examples of dichroic substances that can be used in the present invention include those described in International Publication No. 2018 / 186503, International Publication No. 2019 / 189345, and International Publication No. 2018 / 124198.

[0052] The content of the dichroic substance is preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more, relative to the total mass of the light-absorbing anisotropic film. There is no particular upper limit, but it is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less.

[0053] <Other Components> In the light-absorbing anisotropic film, in addition to the components mentioned above, surfactants, adhesion improvers, and plasticizers may also be included. The type of surfactant is not particularly limited, and known surfactants can be used. The LogP value of the surfactant is not particularly limited, but is often 5.0 or less. In terms of superior effects of the present invention, the LogP value of the surfactant is preferably 4.0 or less, and more preferably 3.0 or less. The lower limit of the LogP value of the surfactant is not particularly limited, but is preferably 1.0 or higher. Here, the LogP value is an index that expresses the hydrophilic and hydrophobic properties of the chemical structure, and is sometimes called the hydrophilic-hydrophobic parameter. The LogP value can be calculated using software such as ChemBioDraw Ultra or HSPiP (Ver. 4.1.07). Also, OECD Guidelines for the Testing of Chemicals, Sections 1, Test No. It can also be determined experimentally by methods such as those described in 117. In this invention, unless otherwise specified, the LogP value is adopted as the value calculated by inputting the structural formula of the compound into HSPiP (Ver. 4.1.07).

[0054] Examples of surfactants include fluorine (meth)acrylate polymers described in paragraphs

[0018] to

[0043] of Japanese Patent Publication No. 2007-272185, and silicon-containing polymers described in paragraphs

[0019] to

[0073] of International Publication No. 2023 / 054164. Other compounds may also be used as surfactants. One surfactant may be used alone, or two or more may be used in combination. When the light-absorbing anisotropic film contains a surfactant, the surfactant content is preferably 0.01 to 10% by mass, and more preferably 0.02 to 5% by mass, relative to the total solid content mass of the light-absorbing anisotropic film.

[0055] Examples of adhesion improvers include reactive additives listed in paragraphs

[0123] to

[0129] of Japanese Patent Publication No. 2019-91088, and boronic acid monomers listed in paragraphs

[0015] to

[0028] of International Publication No. 2015 / 053359.

[0056] Furthermore, in light-absorbing anisotropic films, it is more preferable to orient the organic dichroic dye using the orientation of the liquid crystal compound. In other words, by utilizing the technology of a guest-host liquid crystal cell, the organic dichroic dye can be oriented to a desired orientation in conjunction with the orientation of the host liquid crystal. Specifically, a light-absorbing anisotropic film can be fabricated by mixing a guest organic dichroic dye with a liquid crystal compound that will act as the host liquid crystal, orienting the host liquid crystal, and then orienting the organic dichroic dye along the orientation of its liquid crystal molecules, thereby fixing the orientation state.

[0057] The thickness of the light-absorbing anisotropic film is not particularly limited, but is preferably 50.0 μm or less, more preferably 10.0 μm or less, and even more preferably 5.0 μm or less. The lower limit is not particularly limited, but is preferably 0.1 μm or more.

[0058] [Resin Layer] The long laminate of the present invention has a first resin layer. Here, as described above, when the thickness of the first resin layer is measured in 5m increments along the longitudinal direction, more than 90% of the measurement points satisfy the following condition: Condition: The maximum thickness at positions 5 to 20 mm from both ends in the short direction is within the range of 90 to 110% of the average thickness in the center of the short direction.

[0059] Furthermore, the long laminate of the present invention preferably has a second resin layer between the support and the orientation film, in order to impart properties such as oxygen barrier properties while making the orientation film thinner, and when the thickness of the second resin layer is measured in 5m increments along the longitudinal direction, it is preferable that 90% or more of the measurement points satisfy the above conditions.

[0060] The first resin layer and an optional second resin layer (hereinafter, when there is no need to distinguish between them, they will simply be abbreviated as "resin layer") are preferably transparent. In this invention, "transparent" means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more.

[0061] Such a resin layer is not particularly limited as long as it contains 50% by mass or more of a resin material (i.e., natural resin or synthetic resin), and is preferably an optically isotropic resin layer (hereinafter also referred to as an "isotropic resin layer"), and more preferably an isotropic resin layer formed by coating. Furthermore, it is preferable that the resin layer has small in-plane retardation. Specifically, it is preferable that the in-plane retardation at a wavelength of 550 nm is 10 nm or less, and the absolute value of the retardation in the thickness direction at a wavelength of 550 nm is 50 nm or less. Such a resin layer may be, for example, a conventionally known oxygen barrier layer or hard coat layer, as long as it satisfies the above conditions, but conventionally known adhesive layers and tack layers are excluded.

[0062] Examples of resin materials include polyvinyl alcohol (PVA), modified polyvinyl alcohol, polyethylene vinyl alcohol, polyvinyl ether, polyvinylpyrrolidone, acrylic polymers (e.g., polyacrylamide, polyacrylic acid ester, etc.), cellulose ether, polyamide, polyimide, and styrene / maleic acid copolymer. Of these, it is preferable that the resin layer contains polyvinyl alcohol because the effects of the present invention become apparent and oxygen barrier performance can be imparted.

[0063] Furthermore, the resin material may be a material obtained by crosslinking or polymerizing ionizing radiation-curable polyfunctional monomers or polyfunctional oligomers. Here, the functional groups of the ionizing radiation-curable polyfunctional monomers or polyfunctional oligomers are preferably those that are polymerizable by light, electron beam, or radiation, and among these, photopolymerizable functional groups are preferred. Examples of photopolymerizable functional groups include unsaturated polymerizable functional groups such as (meth)acryloyl groups, vinyl groups, styryl groups, and allyl groups, and among these, (meth)acryloyl groups are preferred.

[0064] In the present invention, it is preferable that the resin layer contains surfactant S-1 and surfactant S-2, which have different structures or molecular weights from each other, in order to suppress the occurrence of aggregation or whitening (especially the occurrence of aggregation).

[0065] Furthermore, in the present invention, it is preferable that the weight-average molecular weight of surfactant S-1 is 600 or more, and the weight-average molecular weight of surfactant S-2 is less than 600, in order to suppress the occurrence of aggregation or whitening (especially the occurrence of aggregation). It is also preferable that the weight-average molecular weight of surfactant S-1 be 800 or more, and more preferably 1000 or more. The upper limit of the weight-average molecular weight of surfactant S-1 is not particularly limited, but it is preferably 10000 or less. The weight-average molecular weight of surfactant S-2 is preferably 550 or less, and more preferably 500 or less. The lower limit of the weight-average molecular weight of surfactant S-2 is not particularly limited, but it is preferably 100 or more. Here, the weight-average molecular weights of surfactants S-1 and S-2 are values ​​measured by gel permeation chromatography (GPC). • Solvent (eluent): N-methylpyrrolidone • Instrument name: TOSOH HLC-8220GPC • Column: Three TOSOH TSKgelSuperAWM-H (6mm x 15cm) columns connected together • Column temperature: 25°C • Sample concentration: 0.1% by mass • Flow rate: 0.35 mL / min • Calibration curve: Calibration curve using seven TOSOH TSK standard polystyrene samples with Mw = 2,800,000 to 1,050 (Mw / Mn = 1.03 to 1.06) was used.

[0066] Furthermore, in the present invention, it is preferable that both surfactant S-1 and surfactant S-2 are non-fluorinated surfactants, as this makes it easier to secure a good effective width. Examples of non-fluorinated surfactants include silicon-based (especially silicone-based) or alkyl-based surfactants.

[0067] In the present invention, as non-fluorinated surfactants, for example, the following commercially available products can be used: BYK Corporation: BYK-333, BYK-3760, BYK-3762, BYK-3764, BYK-L 9565, BYK-L 9568, BYK-379, BYK-347, BYK-3450, BYK-3451, BYK-3410; Silface series (Nisshin Chemical Industry Co., Ltd.): SAG016, SAG002, SAG503A, SAG502, SAG021, SAG020, SAG008, SAG005, SAG003, PD-508, SWP-001; Orphin series (Nisshin Chemical Industry Co., Ltd.): Orphin D-10; MEGAFACE EFS series (manufactured by DIC Corporation): EFS-131, EFS-321, EFS-521, EFS-801 Takesurf (manufactured by Takemoto Oil Co., Ltd.): Takesurf A-51-G, Takesurf D-1107SP3, Takesurf A-32-B Dowsil (manufactured by Toray Dow Corporation): Dowsil 501W, Dowsil SH28, Dowsil 8561

[0068] Furthermore, in the present invention, it is preferable that at least one of surfactant S-1 and surfactant S-2 is a silicone-based surfactant, and it is more preferable that surfactant S-1, which has a weight-average molecular weight of 600 or more, is a silicone-based surfactant, in order to more easily secure a good effective width.

[0069] In the present invention, for the reason that the occurrence of aggregation or whitening (especially the occurrence of aggregation) is suppressed, the content of surfactant S-1 having a weight-average molecular weight of 600 or more is preferably 1% by mass or less, more preferably 0.01 to 0.80% by mass, and even more preferably 0.05 to 0.50% by mass, relative to the total mass of the resin layer. Note that the above content is the same as the amount blended (by mass) relative to the total mass of solids in the composition forming the resin layer.

[0070] Furthermore, in this invention, for the reason that it is easier to secure a good effective width, it is preferable that the following formula (1) is satisfied when comparing the content of surfactant S-1, which has a weight-average molecular weight of 600 or more, and the content of surfactant S-2, which has a weight-average molecular weight of less than 600, in terms of mass % relative to the total mass of the resin layer: Content of S-1 ≥ Content of S-2 (1)

[0071] In the present invention, for the reason that the color tone in virtual reality display devices and the like is good, the average thickness of the resin layer is preferably 0.2 to 0.8 μm, more preferably 0.3 to 0.6 μm, and even more preferably 0.3 to 0.5 μm.

[0072] Figure 3 shows another example of the elongated laminate of the present invention. As shown in Figure 3, the elongated laminate 30 has, in this order, an elongated support 11, an alignment film 12, a light-absorbing anisotropy film 13, a first resin layer 14, and a phase difference layer 16. Depending on the type of phase difference layer 16, the laminate obtained by cutting the elongated laminate 30 can be used as a so-called circular polarizer. Here, the configuration of the support, alignment film, light-absorbing anisotropy film, and first resin layer is as described above, so the configuration of the phase difference layer will be described in detail below.

[0073] [Phase Difference Layer] The long laminate of the present invention may have a phase difference layer. The type of phase difference layer is not particularly limited, but for example, the phase difference layer may include a λ / 4 plate. A λ / 4 plate is a plate having a λ / 4 function, and specifically, it is a plate that has the function of converting linearly polarized light of a certain wavelength (preferably visible light) to circularly polarized light (or circularly polarized light to linearly polarized light). The in-plane retardation of the λ / 4 plate at a wavelength of 550 nm is not particularly limited, but 120 to 150 nm is preferred, 125 to 145 nm is more preferred, and 135 to 140 nm is even more preferred. In addition to the λ / 4 plate, a phase difference layer in which the in-plane retardation at a wavelength of 550 nm is 3 / 4 or 5 / 4 of the wavelength of any light in the visible light spectrum is also preferred. The phase difference layer may have inverse wavelength dispersion. Inverse wavelength dispersion means that the value of the phase difference at a wavelength increases as the wavelength increases. Furthermore, the phase difference layer may have a multilayer structure. Specifically, an example of such a structure is a broadband λ / 4 plate formed by laminating a λ / 4 plate and a λ / 2 plate. The angle between the in-plane slow axis of the phase difference layer and the absorption axis of the optical absorption anisotropy film is not particularly limited, but is preferably within the range of 45° ± 10°.

[0074] The phase difference layer may be a layer in which a liquid crystal compound is immobilized that is twisted and oriented with the thickness direction as the helical axis. For example, as disclosed in Japanese Patent Publication No. 5753922 and Japanese Patent Publication No. 5960743, a phase difference layer may be provided which has a layer in which a rod-shaped liquid crystal compound or a disc-shaped liquid crystal compound is immobilized that is twisted and oriented with the thickness direction as the helical axis.

[0075] The phase difference layer may include a positive A plate. The in-plane retardation of the positive A plate at wavelength 550 is not particularly limited, but is preferably 120 to 150 nm, more preferably 125 to 145 nm, and even more preferably 135 to 140 nm. The positive A plate preferably functions as the λ / 4 plate described above.

[0076] The phase difference layer may include a positive C plate. A positive C plate is a phase difference layer having substantially zero in-plane retardation and negative retardation in the thickness direction. The positive C plate functions as an optical compensation layer to increase the polarization degree of transmitted light for light incident at an oblique angle. The in-plane retardation of the positive C plate at a wavelength of 550 nm is preferably 10 nm or less. The retardation in the thickness direction of the positive C plate at a wavelength of 550 nm is preferably -600 to -40 nm.

[0077] The material constituting the phase difference layer is not particularly limited, but it is preferably formed from a composition containing a liquid crystal compound. Typically, such a phase difference layer can be obtained by vertically oriented rod-shaped polymerizable liquid crystal compounds contained in a polymerizable liquid crystal composition and fixing the orientation state by polymerization. Alternatively, it can also be formed from a composition containing a side-chain polymer liquid crystal compound as the liquid crystal compound.

[0078] The thickness of the phase difference layer is not particularly limited, but is preferably 0.1 to 8 μm, and more preferably 0.3 to 5 μm.

[0079] Figure 4 shows another example of the laminate of the present invention. As shown in Figure 4, the laminate 40 has, in this order, a long support 11, an alignment film 12, a light-absorbing anisotropy film 13, a first resin layer 14, a reflective polarizer 17, a positive A plate 18, and a positive C plate 19. The laminate obtained by cutting the long laminate 40 can be used as a component of a virtual reality display device, which will be described later. Here, the configuration of the support, alignment film, light-absorbing anisotropy film, first resin layer, positive A plate, and positive C plate is as described above, so the configuration of the reflective polarizer will be described in detail below.

[0080] [Reflective Polarizer] The long laminate of the present invention may have a reflective polarizer. A reflective polarizer (reflective linear polarizer) is a linear polarizer that transmits linearly polarized light in a certain direction and reflects linearly polarized light in a direction perpendicular to this linearly polarized light. Any known reflective polarizer (reflective linear polarizer) can be used as a reflective polarizer, as long as it selectively transmits linearly polarized light in a certain direction in the visible light wavelength range. Examples of reflective polarizers include a film made by stretching a dielectric multilayer film, as described in Japanese Patent Application Publication No. 2011-053705, and a wire grid type polarizer. Commercially available reflective polarizers can also be suitably used. Examples of commercially available reflective polarizers include a reflective polarizer manufactured by 3M (product name IQPE) and a wire grid type polarizer manufactured by AGC (product name WGF).

[0081] [Other Components] The long laminate of the present invention may include other components besides the various components described above. The other components are not particularly limited, but examples include an adhesive layer and a surface anti-reflective layer.

[0082] [Polarizing Plate] The polarizing plate of the present invention is a polarizing plate having a laminate obtained by cutting the long laminate of the present invention described above. Here, as described above, in the embodiment shown in Figure 3, depending on the type of phase difference layer 16, the laminate obtained by cutting the long laminate 30 can be used as a so-called circular polarizing plate. However, the polarizing plate of the present invention may have a configuration different from the laminate obtained by cutting the long laminate of the present invention described above, and may have the above-described phase difference layer. Furthermore, the laminate of the polarizing plate of the present invention may be a laminate obtained by peeling off the support after cutting the long laminate of the present invention described above.Therefore, the method for producing the polarizing plate of the present invention is not particularly limited as long as it has a cutting step of cutting the long laminate of the present invention described above, that is, a step of cutting the long laminate to an appropriate length to obtain a laminate, but as described above, it may also have a step of peeling off the support after the cutting step.

[0083] [Composite Lens] The composite lens of the present invention is a composite lens comprising, in this order, a laminate obtained by cutting the long laminate of the present invention described above, a lens, and a half mirror. Figure 5 shows an example of the composite lens of the present invention. The composite lens 50 comprises, in this order, a laminate 40a, a lens 52, and a half mirror 54. Here, the laminate 40a is a laminate obtained by cutting the long laminate 40 shown in Figure 4, and has, in this order, a support 11a, an alignment film 12a, a light-absorbing anisotropy film 13a, a first resin layer 14a, a reflective polarizer 17a, a positive A plate 18a, and a positive C plate 19a. Furthermore, the laminate of the composite lens of the present invention may be a laminate obtained by peeling off the support after cutting the long laminate of the present invention described above. Therefore, the method for manufacturing the composite lens of the present invention is not particularly limited as long as it includes a cutting step to cut the long laminate of the present invention as described above, that is, a step of cutting the long laminate to an appropriate length to obtain a laminate, but as described above, it may also include a step of peeling off the support after the cutting step. The other components other than the laminate included in the composite lens will be described in detail below.

[0084] [Lenses] A composite lens has lenses. Examples of lenses include convex lenses and concave lenses. Examples of convex lenses include biconvex lenses, plano-convex lenses, and convex meniscus lenses. Examples of concave lenses include biconcave lenses, plano-concave lenses, and concave meniscus lenses. For lenses used in virtual reality display devices, convex meniscus lenses or concave meniscus lenses are preferred in terms of expanding the field of view, and concave meniscus lenses are more preferred in terms of minimizing chromatic aberration. As lens materials, transparent materials to visible light such as glass, crystal, and plastic can be used. Since birefringence of lenses can cause rainbow-like unevenness and light leakage, it is preferable for the birefringence to be small, and birefringence-free materials are more preferable.

[0085] [Half-mirror] The composite lens of the present invention has a half-mirror. The half-mirror is a conventionally known half-mirror that transmits about half of the incident light and reflects the remaining about half. The transmittance of the half-mirror is preferably 50 ± 30%, and more preferably 50 ± 10%. The type of half-mirror is not particularly limited, but a reflective layer made of metal is an example. Examples of metals include silver and aluminum. The thickness of the half-mirror is preferably 1 to 20 nm, more preferably 2 to 10 nm, and even more preferably 3 to 6 nm.

[0086] [Display Device (Virtual Reality Display Device)] The display device of the present invention is a display device having a laminate obtained by cutting the long laminate of the present invention described above, and the virtual reality display device of the present invention is a virtual reality display device having a laminate obtained by cutting the long laminate of the present invention described above. That is, the laminate obtained by cutting the long laminate of the present invention described above is applicable to various display devices, and is preferably applied to a virtual reality display device. Furthermore, the laminate of the display device of the present invention may be a laminate obtained by peeling off the support after cutting the long laminate of the present invention described above. Therefore, the method for manufacturing the display device of the present invention is not particularly limited as long as it has a cutting step of cutting the long laminate of the present invention described above, that is, a step of cutting the long laminate to an appropriate length to obtain a laminate, but as described above, it may also have a step of peeling off the support after the cutting step.

[0087] Figure 6 is a schematic diagram showing an example of the configuration of a virtual reality display device. The virtual reality display device 60 shown in Figure 6 includes, from right to left in the figure, an image display panel 62, a circular polarizer 64, and a composite lens 50. The composite lens 50 used in Figure 6 has the same configuration as the composite lens 50 shown in Figure 5.

[0088] In the virtual reality display device 60 shown in Figure 6, light rays emitted from the image display panel 62 pass through the circular polarizer 64 to become circularly polarized, and then pass through the half mirror 54. Next, they pass through the positive A plate included in the laminate 40a to become linearly polarized, and are incident from the reflective polarizer side included in the laminate 40a and reflected. The light reflected by the reflective polarizer passes through the positive A plate to become circularly polarized, is reflected by the half mirror 54, passes through the positive A plate again to become linearly polarized, and is incident on the reflective polarizer again. At this time, the polarization state of the light rays incident on the reflective polarizer again does not change when reflected by the reflective polarizer, but changes to linearly polarized light perpendicular to the linear polarization when it was first incident on the reflective polarizer when it is reflected by the half mirror 54 and passes through the positive A plate. Therefore, the light rays pass through the reflective polarizer and are visible to the user.

[0089] The image display panel 62 is a known image display panel (display panel), such as an organic electroluminescent display panel. In the illustrated example, the image display panel 62 emits an unpolarized image (image light). The unpolarized image emitted by the image display panel 62 passes through the circular polarizer 64 and is converted into circularly polarized light.

[0090] The features of the present invention will be further explained in detail below with reference to examples. The materials, amounts used, proportions, processing content, and processing procedures shown below can be modified as appropriate, as long as they do not depart from the spirit of the present invention. Furthermore, configurations other than those shown below are also possible, as long as they do not depart from the spirit of the present invention.

[0091] [Example 1] [Preparation of support] The following composition was placed in a mixing tank, stirred, and then heated at 90°C for 10 minutes. The resulting composition was then filtered through filter paper with an average pore size of 34 μm and a sintered metal filter with an average pore size of 10 μm to prepare a dope. The solid content concentration of the dope was 23.5% by mass, the amount of plasticizer added was a ratio to the cellulose acylate, and the solvent of the dope was methylene chloride / methanol / butanol = 81 / 18 / 1 (by mass ratio).

[0092] --------------------------------------------------- Cellulose acylate dope --------------------------------------------------- Cellulose acylate (acetyl substitution degree 2.86, viscosity-average degree of polymerization 310) 100 parts by mass Sugar ester compound 1 (formula (S4) below) 6.0 parts by mass Sugar ester compound 2 (formula (S5) below) 2.0 parts by mass Silica particle dispersion (AEROSIL R972, manufactured by Nippon Aerosil Co., Ltd.) 0.1 parts by mass Solvent (methylene chloride / methanol / butanol) 351.9 parts by mass

[0093]

[0094]

[0095] The dope prepared as described above was cast using a drum film-forming machine. The dope was cast from the die so that it was in contact with a metal support cooled to 0°C, and then the resulting web (film) was peeled off the drum. The drum was made of SUS (stainless steel).

[0096] After the casting process, the obtained web (film) was peeled from the drum and dried for 20 minutes in a tenter device at 30-40°C during film transport, using clips to hold both ends of the web in place. Subsequently, the web was further dried by zone heating while being transported on a roll. The obtained web was knurled and then wound up to form cellulose acylate film A1. The thickness of the obtained cellulose acylate film A1 was 60 μm, the in-plane retardation Re(550) at a wavelength of 550 nm was 1 nm, and the thickness-direction retardation Rth(550) at a wavelength of 550 nm was 35 nm.

[0097] [Formation of Photo-Alignment Film B1] The photo-alignment film-forming composition B1, described later, was continuously applied to the cellulose acylate film A1 using a wire bar. The cellulose acylate film A1 with the coating film formed was dried with 140°C hot air for 120 seconds, and then polarized ultraviolet light (10 mJ / cm²) was irradiated onto the coating film.２ By using an ultra-high pressure mercury lamp, a photo-alignment film B1 was formed, and a TAC (triacetylcellulose) film with the photo-alignment film was obtained. The thickness of the photo-alignment film B1 was 1.5 μm.

[0098] -------------------------------------------------- Composition of Photo-Alignment Film Forming Composition B1 -------------------------------------------------- ・Photo-alignment compound PA-1 9.20 parts by mass ・EPICLON N-695 (manufactured by DIC Corporation) 5.27 parts by mass ・jER YX7400 (manufactured by Mitsubishi Chemical Corporation) 1.72 parts by mass ・Polymerizable polymer PA-2 0.65 parts by mass ・Thermal cationic polymerization initiator PAG-1 1.54 parts by mass ・Stabilizer DIPEA 0.11 parts by mass ・Butyl acetate 77.61 parts by mass ・tert-butyl alcohol 3.89 parts by mass --------------------------------------------------

[0099] Photo-oriented compound PA-1 [In the formula, the numerical values ​​listed for each repeating unit represent the content (mass%) of each repeating unit relative to the total number of repeating units. Weight-average molecular weight: 32000]

[0100]

[0101] Polymerizable polymer PA-2 [In the formula, the values ​​of a, b, and c represent the content (mass%) of each repeat relative to the total repeating units. Weight-average molecular weight: 40,000]

[0102]

[0103] Thermal cationic polymerization initiator PAG-1

[0104]

[0105] Stabilizer DIPEA

[0106]

[0107] [Formation of Light-Absorbing Anisotropic Film C1] A light-absorbing anisotropic film-forming composition C1 with the following composition was applied to the obtained photo-alignment film B1 using a wire bar to form a coating film. Next, the coating film was heated at 140°C for 15 seconds (first heating step), followed by heating at 80°C for 5 seconds, and then cooled to room temperature (25°C). Next, the coating film was heated at 75°C for 15 seconds (second heating step), and then cooled again to room temperature. After that, an illuminance of 200 mW / cm was applied using an LED (light-emitting diode) lamp (center wavelength 365 nm). ２ A 1.0 μm thick optical anisotropic film C1 (polarizer) was fabricated on the optical alignment film B1 by irradiating it for 2 seconds under the specified irradiation conditions. When the transmittance of the optical anisotropic film C1 in the wavelength range of 380 to 780 nm was measured using a spectrophotometer, the average visible light transmittance was 43%. The absorption axis of the optical anisotropic film C1 was located within the plane of the optical anisotropic film C1 and was perpendicular to the width direction of the cellulose acylate film A1.

[0108] -------------------------------------------------- Composition C1 for forming anisotropic light-absorbing film -------------------------------------------------- • Organic dichroic dye Dye-Y1 below 0.019 parts by mass • Organic dichroic dye Dye-M1 below 0.12 parts by mass • Organic dichroic dye Dye-C1 below 0.12 parts by mass • Organic dichroic dye Dye-C2 below 0.37 parts by mass • Liquid crystal compound L-1 below 1.29 parts by mass • Liquid crystal compound L-2 below 0.55 parts by mass • Adhesion improver A-1 below 0.04 parts by mass • Polymerization initiator IRGACUREOXE-02 (manufactured by BASF) 0.07 parts by mass • Surfactant F-3 below 0.006 parts by mass • Cyclopentanone 94.97 parts by mass • Benzyl alcohol 2.44 parts by mass --------------------------------------------------

[0109] Organic dichroic dye Dye-Y1

[0110] Organic dichroic dye Dye-M1

[0111] Organic dichroic dye Dye-C1

[0112] Organic dichroic dye Dye-C2

[0113] Liquid crystal compound L-1 [In the formula below, the numerical values ​​listed for each repeating unit ("59", "15", "26") represent the content (mass %) of each repeating unit relative to the total number of repeating units. Weight-average molecular weight: 18000]

[0114]

[0115] Liquid crystal compound L-2

[0116] Adhesion improver A-1

[0117] Surfactant F-3 [In the formula, the numerical values ​​listed for each repeating unit represent the content (mass%) of each repeating unit relative to the total number of repeating units. Weight-average molecular weight: 15000]

[0118] [Formation of Oxygen Barrier Layer (First Resin Layer) D1] A coating solution D1 with the following composition was continuously applied to the light-absorbing anisotropic film C1 using a wire bar. Subsequently, by drying with hot air at 80°C for 5 minutes, a laminate was obtained in which an oxygen barrier layer D1 made of polyvinyl alcohol (PVA) with a thickness of 0.4 μm was formed, i.e., a long laminate CP1 comprising a cellulose acylate film A1 (transparent support), a photo-alignment film B1, a light-absorbing anisotropic film C1, and an oxygen barrier layer D1 adjacent to each other in this order.

[0119] ------------------------------------------------------------------- Oxygen barrier layer forming coating solution D1 ------------------------------------------------------------------- Modified polyvinyl alcohol 2.39 parts by mass Initiator Irg2959 0.13 parts by mass Pyridinium p-toluenesulfonate 0.041 parts by mass 2,5-dimethoxy-2,5-dihydrofuran 0.13 parts by mass Surfactant S-1 from Table 1 below 0.0041 parts by mass (0.15% by mass of total solids) Surfactant S-2 from Table 1 below 0.0014 parts by mass (0.05% by mass of total solids) Water 74.70 parts by mass Ethanol 22.60 parts by mass -------------------------------------------------------------------

[0120] Modified polyvinyl alcohol

[0121] [Examples 2-9 and Comparative Examples 1-2] In forming the oxygen barrier layer D1, the types and contents of surfactants S-1 and S-2 were changed as shown in Table 1 below. Except for this change, a long laminate comprising a cellulose acylate film A1 (transparent support), a photo-alignment film B1, a light-absorbing anisotropic film C1, and an oxygen barrier layer was obtained in the same manner as in Example 1, with these components arranged adjacently in this order.

[0122] [Example 10] In the formation of the oxygen barrier layer D1, a coating solution D10 for forming an oxygen barrier layer having the following composition was used instead of the coating solution D1 for forming the oxygen barrier layer, but otherwise a long laminate comprising a cellulose acylate film A1 (transparent support), a photo-alignment film B1, a light-absorbing anisotropic film C1, and an oxygen barrier layer arranged in this order adjacently was obtained using the same method as in Example 1. ------------------------------------------------------------------- Oxygen barrier layer forming coating solution D10 ------------------------------------------------------------------- Modified polyvinyl alcohol 2.39 parts by mass Initiator Irg2959 0.13 parts by mass Pyridinium p-toluenesulfonate 0.041 parts by mass 2,5-dimethoxy-2,5-dihydrofuran 0.13 parts by mass Surfactant S-1 in Table 1 below 0.0041 parts by mass (0.15% by mass relative to the total mass of solids) Water 63.25 parts by mass Ethanol 34.06 parts by mass -------------------------------------------------------------------

[0123] [Evaluation] (1) For long laminates prepared with measurement points that meet the conditions, the thickness of the oxygen barrier layer was measured in 5m increments along the length, and the percentage of measurement points that met the following conditions was investigated using the method described above. The results are shown in Table 1 below. Table 1 also shows the ratio of the maximum thickness at positions 5 to 20 mm from both ends in the short direction to the average thickness at the center in the short direction. Condition: The maximum thickness at positions 5 to 20 mm from both ends in the short direction is within the range of 90 to 110% of the average thickness at the center in the short direction.

[0124] (2) For the long laminated material with the effective width, a white light source was shone from the first resin layer (oxygen barrier layer) side and the reflected light was observed. At that time, the area where the color changed significantly when the color of the central part in the short direction was used as a reference was evaluated as the area of ​​color degradation, and the area where there was no change in color and the area where the change in color was small were measured as the effective width.

[0125] (3) For the long laminates that had been prepared with aggregation or whitening, the surface shape of the first resin layer (oxygen barrier layer) side was measured using an atomic force microscope (AFM) mode with a Hitachi High-Tech SPA-400 to observe the presence or absence of aggregation structures. In addition, the presence or absence of whitening was observed using the same method as in (2) above. These observations were evaluated according to the following criteria. The results are shown in Table 1 below. <Evaluation Criteria> A: No aggregation or whitening occurred B: Aggregation structure occurred in some areas, but no whitening occurred

[0126]

[0127] The compound names and other details for the surfactant products listed in Table 1 above are as follows: ・BYK3420: Polyether-modified polydimethylsiloxane (manufactured by BIC Chemie Japan) ・BYK348: Polyether-modified siloxane (manufactured by BIC Chemie Japan) ・BYK3451: Polyether-modified siloxane (manufactured by BIC Chemie Japan) ・Rapizol® A-90: Sodium di-2-ethylhexyl sulfosuccinate (manufactured by Nippon Oil & Fats Co., Ltd.) ・BYK-DYNWET 800: Alcohol alkoxylate (manufactured by BIC Chemie Japan) ・Orphine D-10: Acetylene glycol (manufactured by Nisshin Chemical Industry Co., Ltd.)

[0128] As shown in Table 1 above, when the film thickness of the first resin layer was measured in 5m increments along the longitudinal direction, it was found that the effective width was narrower when no measurement points satisfying the above-mentioned conditions existed (Comparative Examples 1 and 2). Conversely, when the film thickness of the first resin layer was measured in 5m increments along the longitudinal direction, it was found that the effective width was wider when 90% or more of the measurement points satisfying the above-mentioned conditions were found to be equal to the total number of measurement points (Examples 1 to 10). In particular, a comparison of Examples 1 to 3 revealed that the occurrence of aggregation or whitening could be further suppressed when the resin layer contained surfactants S-1 and S-2 with different structures or molecular weights. Furthermore, a comparison of Example 2 and Example 8 revealed that the occurrence of aggregation or whitening could be further suppressed when the weight-average molecular weight of surfactant S-1 was 600 or more and the weight-average molecular weight of surfactant S-2 was less than 600. Furthermore, a comparison between Example 2 and Example 9 revealed that when comparing the content of surfactant S-1 with a weight-average molecular weight of 600 or more, and the content of surfactant S-2 with a weight-average molecular weight of less than 600, in terms of mass % relative to the total mass of the resin layer, the effective width becomes wider when the above formula (1) is satisfied.

[0129] 10, 20, 30, 40 Long laminate 11 Long support 12 Long alignment film 13 Long light-absorbing anisotropic film 14 Long first resin layer 15 Long second resin layer 16 Long phase difference layer 17 Long reflective polarizer 18 Long positive A plate 19 Long positive C plate 11a Support 12a Alignment film 13a Light-absorbing anisotropic film 14a First resin layer 17a Reflective polarizer 18a Positive A plate 19a Positive C plate 40a Laminate 50 Composite lens 52 Lens 54 Half mirror 60 Virtual reality display device 62 Image display device 64 Circular polarizer

Claims

1. A long laminate having a support, an alignment film, a light-absorbing anisotropic film, and a first resin layer in this order, wherein the light-absorbing anisotropic film contains a liquid crystal compound and a dichroic substance, and when the thickness of the first resin layer is measured in 5m increments along the longitudinal direction, 90% or more of the measurement points satisfy the following condition: Condition: The maximum thickness of the resin layer at positions 5 to 20 mm from both ends in the short direction is within the range of 90 to 110% of the average thickness of the resin layer in the center of the short direction.

2. The long laminate according to claim 1, further comprising a second resin layer between the support and the orientation film, wherein when the thickness of the second resin layer is measured in 5m increments along the longitudinal direction, 90% or more of the measurement points satisfy the above condition.

3. The long laminate according to claim 1, wherein the average thickness of the first resin layer is 0.2 to 0.8 μm.

4. The long laminate according to claim 1, wherein the first resin layer contains surfactants S-1 and S-2 that have different structures or molecular weights from each other.

5. The long laminate according to claim 4, wherein the weight-average molecular weight of surfactant S-1 is 600 or more, and the weight-average molecular weight of surfactant S-2 is less than 600.

6. The long laminate according to claim 4, wherein both surfactant S-1 and surfactant S-2 are non-fluorinated surfactants.

7. The long laminate according to claim 4, wherein at least one of the surfactant S-1 and the surfactant S-2 is a silicone-based surfactant.

8. The long laminate according to claim 1, wherein the first resin layer contains polyvinyl alcohol.

9. The long laminate according to claim 5, wherein the content of the surfactant S-1 is 1% by mass or less with respect to the total mass of the first resin layer.

10. The long laminate according to claim 5, wherein when the content of surfactant S-1 and the content of surfactant S-2 are compared in mass % relative to the total mass of the first resin layer, the following formula (1) is satisfied: Content of S-1 ≥ Content of S-2 (1) 11. A polarizing plate having a laminate obtained by cutting a long laminate according to any one of claims 1 to 10.

12. A composite lens comprising, in this order, a laminate obtained by cutting a long laminate according to any one of claims 1 to 10, a lens, and a half mirror.

13. A display device having a laminate obtained by cutting a long laminate according to any one of claims 1 to 10.

14. A virtual reality display device having a laminate obtained by cutting a long laminate according to any one of claims 1 to 10.

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