CN114631044A - Polarizing plate composite and optical laminate - Google Patents

Polarizing plate composite and optical laminate Download PDF

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Publication number
CN114631044A
CN114631044A CN202080073998.1A CN202080073998A CN114631044A CN 114631044 A CN114631044 A CN 114631044A CN 202080073998 A CN202080073998 A CN 202080073998A CN 114631044 A CN114631044 A CN 114631044A
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CN
China
Prior art keywords
region
polarizing plate
polarizing
cell
reinforcing material
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CN202080073998.1A
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Chinese (zh)
Inventor
松本寿和
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Publication of CN114631044A publication Critical patent/CN114631044A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation

Abstract

The polarizing plate composite comprises: the polarizing plate comprises a polarizing plate, a 1 st reinforcing material arranged on one surface side of the polarizing plate, and a 2 nd reinforcing material arranged on the other surface side of the polarizing plate. The polarizing plate has a polarizing region having a thickness of 15 [ mu ] m or less and a non-polarizing region surrounded by the polarizing region in a plan view. The 1 st reinforcing material has a plurality of 1 st cells having open end faces, and is arranged in such a manner that each open end face is opposed to a face of the polarizing plate. The 1 st reinforcing material has a cell region where the 1 st cell is present and a region corresponding to the polarization region, and a non-cell region where the 1 st cell is absent and a region corresponding to the non-polarization region is present. The 2 nd reinforcing material has a plurality of 2 nd cells having open end faces, and is arranged in such a manner that each open end face is opposed to a face of the polarizing plate. The 2 nd reinforcing material has a plurality of 2 nd cells, and the 2 nd cells are present at least in a region corresponding to the non-polarizing region. The non-polarizing region and the non-cell region contain a cured product of an active energy ray-curable resin composition, and the cured product contained in the non-polarizing region is provided in a through-hole surrounded by the polarizing region in a plan view.

Description

Polarizing plate composite and optical laminate
Technical Field
The present invention relates to a polarizing plate composite and an optical laminate.
Background
Polarizing plates are widely used as supply elements of polarized light in display devices such as liquid crystal display devices and organic Electroluminescence (EL) display devices, and as detection elements of polarized light. Display devices including polarizing plates are also widespread in mobile devices such as notebook personal computers and cellular phones, and polarizing plates having regions of different transmittances are required for diversification of display purposes, clarification of display distinction, decoration, and the like. In particular, in small and medium-sized mobile terminals represented by smartphones and tablet terminals, a polarizing plate may be bonded to the entire display surface in order to form a design without a boundary on the entire surface from the viewpoint of decorative properties. In this case, the polarizing plate may be overlapped in the area of the camera lens or the area where the icon or the logo is printed on the screen, and thus there is a problem that the sensitivity of the camera is deteriorated and the design is deteriorated.
For example, patent document 1 describes the following: a low-concentration dichroic material portion having a relatively low content of a dichroic material is locally provided in a polarizing plate included in a polarizing plate, and a camera is disposed in correspondence with the low-concentration dichroic material portion, whereby the performance of the camera is not adversely affected.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication (Kokai) No. 2015-215609
Disclosure of Invention
Problems to be solved by the invention
In patent document 1, a resin film containing a dichroic substance is partially decolored by performing a chemical treatment of bringing an alkaline solution into contact with the resin film to form a low-concentration portion of the dichroic substance. The treatment of the alkaline solution used for decoloring as a waste liquid requires labor and cost. Patent document 1 describes the following: in the case of using iodine as the dichroic material, the content of iodine can be reduced by contacting with an alkaline solution to form the dichroic material low-concentration portion. However, a specific method of forming a low-concentration portion of a dichroic substance in the case of using a dichroic substance other than iodine is not disclosed.
The purpose of the present invention is to provide a polarizing plate composite and an optical laminate provided with a novel polarizing plate, which substitute for a polarizing plate having a region with a low dichroic substance content formed by chemical treatment such as decolorization.
Means for solving the problems
The present invention provides the following polarizing plate complex and optical laminate.
[ 1] A polarizing plate composite comprising a polarizing plate, a 1 st reinforcing material provided on one surface side of the polarizing plate, and a 2 nd reinforcing material provided on the other surface side of the polarizing plate,
the polarizing plate has a polarizing region having a thickness of 15 [ mu ] m or less and a non-polarizing region surrounded by the polarizing region in a plan view,
having a plurality of 1 st cells having open end faces and arranged in such a manner that each open end face is opposed to the face of the polarizing plate,
the 1 st reinforcing material having a cell region where the 1 st cell described above is present and a region corresponding to the polarizing region described above, and a non-cell region where the 1 st cell described above is not present and a region corresponding to the non-polarizing region described above,
the 2 nd reinforcing material has a plurality of 2 nd cells having open end faces and arranged such that each open end face is opposed to the face of the polarizing plate,
the 2 nd cell is present at least in a region corresponding to the non-polarizing region,
the non-polarizing region and the non-cell region contain a cured product of an active energy ray-curable resin, and the cured product contained in the non-polarizing region is provided in a through hole surrounded by the polarizing region in a plan view.
The polarizing plate composite according to [ 1], wherein the thickness of the cured product is the same as the total thickness of the polarizing region and the thickness of the cell region.
[ 3] the polarizing plate composite according to [ 1], wherein the thickness of the cured product is smaller than the total thickness of the polarizing region and the thickness of the cell region.
The polarizing plate composite according to [ 1], wherein the thickness of the cured product is larger than the total thickness of the polarizing region and the thickness of the cell region.
The polarizing plate composite according to any one of [ 1] to [ 4], wherein the unpolarized region has a light-transmitting property.
The polarizing plate composite according to any one of [ 1] to [ 5], wherein the non-polarizing region has a diameter of 0.5mm to 20mm in a plan view.
The polarizing plate composite according to any one of [ 1] to [ 6], wherein the active energy ray-curable resin contains an epoxy compound.
The polarizing plate composite according to [ 7], wherein the epoxy compound comprises an alicyclic epoxy compound.
[ 9] the polarizer composite according to any one of [ 1] to [ 8], wherein shapes of the openings of the 1 st cell and the 2 nd cell are each independently a polygon, a circle, or an ellipse.
[ 10] the polarizing plate composite according to any one of [ 1] to [ 9], wherein a light-transmitting filler is further provided in an inner space of the 1 st cell.
The polarizing plate composite according to any one of [ 1] to [ 10], wherein a light-transmitting filler is further provided in an inner space of the 2 nd cell.
An optical laminate according to any one of [ 1] to [ 11], wherein a protective layer is provided on one surface side or both surfaces side of the polarizing plate composite.
Effects of the invention
According to the present invention, a polarizing plate composite and an optical laminate provided with a novel polarizing plate can be provided.
Drawings
Fig. 1 (a) is a schematic cross-sectional view schematically showing an example of the polarizing plate composite of the present invention, fig. 1 (b) is a schematic plan view of the polarizing plate composite shown in fig. 1 (a) from the reinforcing material 1 side, and fig. 1 (c) is a schematic plan view of the polarizing plate composite shown in fig. 1 (a) from the reinforcing material 2 side.
Fig. 2 (a) and (b) are schematic cross-sectional views schematically showing another example of the polarizing plate composite of the present invention.
FIGS. 3 (a) and (b) are views schematically showing an example of a cross section around the non-polarizing region and the non-cell region of the polarizing plate composite, and are explanatory views for explaining a method of determining the thickness of a cured product disposed in the non-polarizing region and the non-cell region.
Fig. 4 (a) to (d) are schematic cross-sectional views schematically showing an example of the method for producing the polarizing plate composite of the present invention.
Fig. 5 (a) and (b) are schematic cross-sectional views showing the subsequent process for producing the polarizing plate composite shown in fig. 4.
Fig. 6 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present invention.
Detailed Description
Preferred embodiments of the polarizing plate, the polarizing plate composite, and the optical laminate according to the present invention will be described below with reference to the drawings. In all the drawings below, the scale of each component shown in the drawings is appropriately adjusted to facilitate understanding of each component, and the scale of each component does not necessarily coincide with the scale of the actual component.
< polarizer composite >
Fig. 1 (a) is a schematic cross-sectional view schematically showing an example of the polarizing plate composite of the present embodiment, fig. 1 (b) is a schematic plan view of the 1 st reinforcing material side of the polarizing plate composite shown in fig. 1 (a), and fig. 1 (c) is a schematic plan view of the 2 nd reinforcing material side of the polarizing plate composite shown in fig. 1 (a). Fig. 2 (a) and (b) are schematic cross-sectional views showing another example of the polarizing plate composite of the present embodiment. The polarizing plate composite 40 shown in fig. 1 and 2 includes a polarizing plate 10, a 1 st reinforcing material 50 provided on one surface side of the polarizing plate 10, and a 2 nd reinforcing material 60 provided on the other surface side of the polarizing plate 10.
As shown in fig. 1 (a), the polarizing plate 10 included in the polarizing plate composite 40 includes a polarizing region 11 and a non-polarizing region 12. The thickness of the polarizing region 11 is 15 μm or less.
The polarizing region 11 and the non-polarizing region 12 in the polarizing plate 10 are not particularly limited as long as the polarizing region 11 surrounds the non-polarizing region 12. The total area occupied by the polarizing regions 11 is preferably larger than the total area occupied by the non-polarizing regions 12 when the polarizing plate 10 is viewed in plan. The polarizing plate 10 may have 1 unpolarized region 12, or may have 2 or more unpolarized regions 12. In the case of having 2 or more non-polarizing regions 12, the shapes of the respective non-polarizing regions 12 may be the same as each other, or may be different from each other.
The 1 st reinforcing material 50 of the polarizing plate composite 40 has a plurality of 1 st cells 51 having open end faces, and is arranged so that each open end face faces the surface of the polarizing plate 10, as in the example shown in fig. 1 (b). The 1 st reinforcing material 50 has a cell region 55 where the 1 st cells 51 exist and a non-cell region 56 where the 1 st cells 51 do not exist. The 1 st cell 51 has a hollow columnar (cylindrical) structure surrounded by cell partition walls 53 that partition the 1 st cell 51, and both axial ends of the columnar structure become open end faces. The non-cell region 56 where the 1 st cell 51 does not exist is a region where the cell partition wall 53 constituting the 1 st cell 51 and a hollow columnar (cylindrical) space surrounded by the cell partition wall 53 do not exist.
In the 1 st reinforcing material 50, the cell region 55 exists in a region corresponding to the polarizing region 11 existing in the polarizing plate 10, and the non-cell region 56 exists in a region corresponding to the non-polarizing region 12 of the polarizing plate 10. Here, the presence of the cell region 55 in the region corresponding to the polarizing region 11 means that the cell region 55 and the polarizing region 11 have substantially the same shape and substantially the same size as each other in a plan view direction, and similarly, the presence of the non-cell region 56 in the region corresponding to the non-polarizing region 12 means that the non-cell region 56 and the non-polarizing region 12 have substantially the same position, substantially the same shape, and substantially the same size (diameter) as each other in a plan view direction. In other words, it means that the projected area of the non-cellular region 56 is substantially the same as the non-polarizing region 12 located in the polarizing plate 10 when the non-cellular region 56 is projected to the polarizing plate 10 in the plan view direction. According to the manufacturing means of the polarizing plate composite described later, a polarizing plate composite in which the cell region 55 exists in the region corresponding to the polarizing region 11 can be efficiently manufactured. In the case where the polarizing plate 10 contained in the polarizing plate complex 40 has 2 or more non-polarizing regions 12, as long as the non-cell region 56 exists in a region corresponding to at least 1 non-polarizing region 12, the cell region 55 may also exist in a region corresponding to the other non-polarizing region 12.
The 2 nd reinforcing material 60 of the polarizing plate composite 40 has a plurality of 2 nd cells 61 having open end faces, and is arranged so that each open end face faces the surface of the polarizing plate 10, as in the example shown in fig. 1 (c). The 2 nd reinforcing material 60 has a hollow columnar (cylindrical) structure surrounded by cell walls 63 partitioning the 2 nd cells 61, similarly to the 1 st cells 51, and both ends in the axial direction of the columnar structure are open end faces. In the 2 nd reinforcing material 60, unlike the 1 st reinforcing material 50, the 2 nd cells 61 are also present in the region corresponding to the non-polarizing region 12 (in fig. 1 (c), the portion indicated by the wavy line). The 2 nd reinforcing material 60 preferably has the 2 nd cell 61 in both of the polarizing region 11 and the non-polarizing region 12, and more preferably has the 2 nd cell 61 in the entire face of the polarizing plate 10.
The non-polarizing region 12 of the polarizing plate 10 and the non-cell region 56 of the 1 st reinforcing material 50 contain a cured product of an active energy ray-curable resin (hereinafter, sometimes referred to as "curable resin (X)"). The non-polarizing region 12 is a region in which a cured product of the curable resin (X) is provided in the through hole 22 surrounded by the polarizing region 11 in a plan view. The non-cell region 56 is a region in which a cured product of the curable resin (X) is provided in the through-holes 52 provided in the region corresponding to the through-holes 22 so that the entire or a part of the plurality of 1 st cells 51 is cut out. The through-hole 22 of the polarizing plate 10 and the through-hole 52 of the 1 st reinforcing material 50 may have the same shape in a plan view. The through-holes 22 and the through-holes 52 may communicate in the thickness direction of the polarizing region 11, and a cured product of the curable resin (X) may be provided over the communicating through- holes 22 and 52.
The polarizing plate 10 included in the polarizing plate composite 40 has a non-polarizing region 12 as shown in fig. 1 (a). Therefore, when the polarizing plate composite 40 is applied to a display device such as a liquid crystal display device or an organic EL display device which is widely used in a smartphone or a tablet terminal, a decrease in sensitivity and a decrease in design of a camera can be suppressed by disposing a printing portion such as a camera lens, an icon, or a logo in correspondence with the non-polarizing region 12.
In the polarizing plate composite 40, since the polarizing plate 10 has the non-polarizing region 12, it is considered that cracks are likely to occur around the non-polarizing region 12 due to shrinkage of the polarizing plate 10 caused by a temperature change that is applied to a display device or the like. In addition, since the polarizing plate 10 has a thickness of the polarizing region 11 as thin as 15 μm or less, it is considered that cracks are likely to occur when an impact is applied. In the polarizing plate composite 40, since the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 are provided on both surfaces of the polarizing plate 10 as described above, it is considered that the generation of cracks and the development of fine cracks into large cracks can be suppressed when the polarizing plate composite is subjected to a temperature change or an impact.
In the polarizing plate composite 40, the through-holes 22 of the polarizing plate 10 and the through-holes 52 of the 1 st reinforcing material 50 can be made solid by including the cured product of the curable resin (X) in the non-polarizing region 12 and the non-cell region 56. Since the polarizing plate 10 included in the polarizing plate composite 40 has a thickness as thin as 15 μm or less, if a cured product of the curable resin (X) is not provided in the non-polarizing region 12 and the through-hole 22 is hollow, there is a possibility that defects such as cracks may occur around the through-hole 22 due to shrinkage of the polarizing plate caused by a change in temperature to which the polarizing plate is exposed when used in a display device or the like. On the other hand, as in the polarizing plate 10 of the polarizing plate composite 40, by providing a cured product of the curable resin (X) in the through- holes 22 and 52, the non-polarizing region 12 and the non-cell region 56 can be made solid, and therefore the occurrence of the above-described problem can be suppressed.
The thickness of the cured product of the curable resin (X) provided in the polarizing plate composite 40 may be the same as the total thickness of the polarizing region 11 and the thickness of the cell region 55 (fig. 1 (a)), may be smaller than the total thickness (fig. 2 (a)), or may be larger than the total thickness (fig. 2 (b)). The cured product of the curable resin (X) provided in the polarizing plate composite 40 may be provided so as to plug at least a part of the through-hole 22 of the polarizing plate 10 and at least a part of the through-hole 52 of the 1 st reinforcing material 50. The cured product of the curable resin (X) is preferably provided so as to fill the entire through-hole 22 of the polarizing plate 10, and more preferably provided so as to fill the entire through-hole 22 of the polarizing plate 10 and the entire through-hole 52 of the 1 st reinforcing material 50.
The thickness of the cured product provided on the polarizing plate composite 40 was determined as follows. First, in the polarizing plate composite 40, the 1 st plane including the surface of the polarizing region 11 of the polarizing plate 10 (the surface on the side opposite to the 1 st reinforcing material 50) and the 2 nd plane including the open end face of the cell region 55 of the 1 st reinforcing material 50 (the open end face on the side opposite to the polarizing plate 10) are assumed. Next, in the non-polarizing region 12, the 1 st position where the shortest distance between the surface of the cured product on the polarizing plate 10 side and the 1 st plane becomes the largest, and the 2 nd position where the shortest distance between the surface of the cured product on the 1 st reinforcing material 50 side and the 2 nd plane becomes the largest are determined. Then, the total value (dm + dn + D) of the shortest distance (dm) at the 1 st position, the shortest distance (dn) at the 2 nd position, and the distance (D) between the 1 st plane and the 2 nd plane is defined as the thickness of the cured product provided on the polarizing plate composite 40.
The method of determining the thickness of the cured product disposed in the non-polarizing region 12 and the non-cellular region 56 when the thickness is different from the total thickness of the polarizing region 11 and the cellular region 55 will be specifically described with reference to fig. 3. FIGS. 3 (a) and (b) are views schematically showing an example of a cross section around the non-polarizing region and the non-cell region of the polarizing plate composite, and are explanatory views for explaining a method of determining the thickness of a cured product disposed in the non-polarizing region and the non-cell region.
In the case where the non-polarizing region 12 and the non-cell region 56 are provided with a cured product as shown in fig. 3 (a), a straight line along the surface side of the 1 st reinforcing material 50 on the side opposite to the polarizing plate 10 side and located in the non-cell region 56 is assumed as the 1 st plane 11 m. The position at which the length of a straight line ("dm" in fig. 3 (a)) connecting an arbitrary point on the 1 st plane 11m and an arbitrary point on the surface of the cured product disposed in the non-cellular region 56 becomes the maximum among straight lines having the shortest distance therebetween is the 1 st position. Next, as shown in fig. 3 (a), a straight line indicated by a one-dot chain line along the surface side of the polarizing plate 10 opposite to the 1 st reinforcing material 50 side and located in the non-polarizing region 12 is assumed as a 2 nd plane 11 n. The position at which the length of a straight line ("dn" in fig. 3 (a)) connecting an arbitrary point on the 2 nd plane 11n and an arbitrary point on the surface of the cured product disposed in the non-polarizing region 12 becomes the maximum among straight lines having the shortest distance therebetween is the 2 nd position. Here, as shown in fig. 3 (a), when the surfaces of the cured products disposed in the non-polarizing regions 12 and the non-cell regions 56 are present on the inner surface side (the polarizer 10 and the 1 st reinforcing material 50 side) of the 1 st plane 11m and the 2 nd plane 11n in the thickness direction of the polarizer composite 40, dm and dn are expressed as negative values. The distance between the 1 st plane 11m and the 2 nd plane 11n is D. Thus, the thickness of the cured product disposed in the non-polarized regions 12 and the non-cellular regions 56 shown in FIG. 3 (a) can be determined as D + dm + dn (negative values for dm and dn).
In addition, as shown in fig. 3 (b), in the case where the cured products are provided in the non-polarizing regions 12 and the non-cellular regions 56, the thickness of the cured products provided in the non-polarizing regions 12 and the non-cellular regions 56 can be determined by assuming the 1 st plane 11m and the 2 nd plane 11n, as described above. Specifically, first, the position where the length of a straight line ("dm" in fig. 3 (b)) connecting an arbitrary point on the 1 st plane 11m and an arbitrary point provided on the surface of the cured product of the 1 st reinforcing material 50 becomes the maximum among straight lines having the shortest distance therebetween is defined as the 1 st position. Next, of the straight lines that connect an arbitrary point on the 2 nd plane 11n and an arbitrary point on the surface of the cured product disposed in the non-polarizing region 12, the position at which the length ("dn" in fig. 3 b) of the straight line becomes the maximum is defined as the 2 nd position. Here, as shown in fig. 3 (b), when the surfaces of the cured products provided in the non-polarizing region 12 and the non-cell region 56 are present on the outer surface side (the side opposite to the polarizing plate 10 and the 1 st reinforcing material 50) of the 1 st plane 11m and the 2 nd plane 11n in the thickness direction of the polarizing plate composite 40, dm and dn are expressed as positive values. Thus, the thickness of the cured product disposed in the non-polarized regions 12 and the non-cellular regions 56 shown in FIG. 3 (b) can be determined as D + dm + dn (where dm and dn are positive values).
In the polarizing plate composite 40 shown in fig. 2 (a), the 2 nd reinforcing material 60 may be inserted into the through-hole 22 of the polarizing plate 10 and provided on the cured product of the curable resin (X) in the through-hole 22. In the polarizing plate composite 40 shown in fig. 2 (b), the 2 nd reinforcing material 60 may be provided on the surface of the cured product of the curable resin (X) provided so as to protrude from the through-hole 22 of the polarizing plate 10.
The 1 st cell 51 and the 2 nd cell 61 of each of the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 of the polarizer composite 40 may be the same shape and size as each other, or at least one of the shape and size may be different from each other. The opening of the 1 st cell 51 of the 1 st reinforcing material 50 and the opening of the 2 nd cell 61 of the 2 nd reinforcing material 60 provided in the polarizing plate 10 may be arranged so as to overlap each other in a plan view, but are preferably arranged so as to be shifted from each other.
The polarizing plate composite 40 is used in a display device or the like in a state of being provided with the polarizing plate 10, the 1 st reinforcing material 50, and the 2 nd reinforcing material 60. If the internal spaces of the 1 st cell 51 of the 1 st reinforcing material 50 and the 2 nd cell 61 of the 2 nd reinforcing material 60 are hollow, the visibility of the display device may be reduced due to the difference in the refractive index between the cell partition wall 53 and the internal space of the 1 st cell 51, the difference in the refractive index between the cell partition wall 63 and the internal space of the 2 nd cell 61, and the like. Therefore, it is preferable that a light-transmitting filler is provided in the internal space of the 1 st cell 51 of the 1 st reinforcing material 50 and the internal space of the 2 nd cell 61 of the 2 nd reinforcing material 60 in the polarizer composite 40. In the case where a gap is provided between the plurality of 1 st cells 51 or between the plurality of 2 nd cells 61 in the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 of the polarizer composite 40 as described later, it is preferable that a light-transmitting filler is also provided in the gap.
In the present specification, the light transmittance refers to a property (transmittance) that visible light having a wavelength of 400nm to 700nm transmits 80% or more, preferably 85% or more, more preferably 90% or more, and still more preferably 92% or more. The following definition of "light transmittance" and preferred ranges of transmittance for visible light are also the same as described above.
The polarizing plate composite 40 may be a single piece or an elongated body having a length that is wound into a roll shape during storage, transportation, or the like. The planar shape and size of the polarizing plate composite 40 are not particularly limited.
(polarizing region)
The polarizing region 11 of the polarizing plate 10 preferably exhibits absorption dichroism at a wavelength ranging from 380nm to 780 nm. The polarizing plate 10 has a property of absorbing linearly polarized light having a vibration plane parallel to the absorption axis thereof and transmitting linearly polarized light having a vibration plane orthogonal to the absorption axis (parallel to the transmission axis), and this property can be obtained mainly by the polarizing region 11.
The polarization region 11 may use, for example: films obtained by adsorbing and orienting a dichroic substance such as iodine or a dichroic dye on a hydrophilic polymer film such as a polyvinyl alcohol film, a partially acetalized polyvinyl alcohol film, or an ethylene-vinyl acetate copolymer partially saponified film; and a polyene-based alignment film or a film in which a liquid crystal compound is aligned, which is obtained by adsorbing and aligning a dichroic material to a dehydrated polyvinyl alcohol or a desalted polyvinyl chloride. Among these, as a film having excellent optical properties, a film obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching the dyed film is preferably used.
First, a method for producing a film obtained by uniaxially stretching a polyvinyl alcohol film dyed with iodine, which is a preferable polarizing region 11, will be briefly described.
The dyeing with iodine is performed by, for example, immersing a polyvinyl alcohol film in an aqueous iodine solution. The stretching ratio of the uniaxial stretching is preferably 3 to 7 times. The stretching may be performed after the dyeing treatment, or may be performed while dyeing. In addition, dyeing may be performed after stretching.
The polyvinyl alcohol film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment, and the like as necessary. For example, by immersing the polyvinyl alcohol film in water and washing with water before dyeing, not only dirt and an antiblocking agent on the surface of the polyvinyl alcohol film can be washed, but also the polyvinyl alcohol film can be swollen to prevent uneven dyeing and the like.
The stretching treatment, dyeing treatment, crosslinking treatment (boric acid treatment), washing treatment, and drying treatment of the polyvinyl alcohol resin film can be performed, for example, according to the method described in japanese patent laid-open No. 2012-159778. In the method described in this document, a polyvinyl alcohol resin layer to be the polarizing region 11 is formed by coating a polyvinyl alcohol resin on a base film. In this case, the substrate film used may be used as the 1 st support layer 25 described later.
Next, the polarizing region 11 in which a dichroic dye is adsorbed and aligned to a film in which a liquid crystal compound is aligned will be briefly described. As the polarizing region 11 in this case, for example, as described in japanese patent application laid-open nos. 2013-37353, 2013-33249, and 2016-170368, 2017-83843, a film in which a dichroic dye is aligned in a cured film obtained by polymerizing a liquid crystal compound can be used. As the dichroic dye, a dichroic dye having absorption in a wavelength range of 380 to 800nm can be used, and an organic dye is preferably used. Examples of the dichroic dye include azo compounds. The liquid crystal compound is a liquid crystal compound capable of being polymerized in an aligned state, and may have a polymerizable group in a molecule. The cured film obtained by polymerizing the liquid crystal compound may be formed on a base film, and in this case, the base film may be used as the 1 st support layer 25 described later.
It is also preferable that the polarizing film for the polarizing region 11 is produced as described above, and then the non-polarizing region 12 is formed by punching to form the polarizing plate 10. In the present specification, such a polarizing film formed only of the polarizing region 11 is sometimes referred to as a raw polarizing plate 20.
The visibility-corrected polarization degree (Py) of the polarization region 11 is preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more. The monomer transmittance (Ts) of the polarizing region 11 is generally less than 50%, and may be 46% or less. The monomer transmittance (Ts) of the polarizing region 11 is preferably 39% or more, more preferably 39.5% or more, further preferably 40% or more, and particularly preferably 40.5% or more.
The monomer transmittance (Ts) is a Y value obtained by measuring a 2-degree field of vision (C light source) according to JIS Z8701 and correcting visibility. The visibility-corrected polarization degree (Py) can be determined by the following formula based on the visibility-corrected parallel transmittance Tp and orthogonal transmittance Tc, and can be measured, for example, using an ultraviolet-visible spectrophotometer (product name: V7100, manufactured by japan spectrographs).
Py[％]＝{(Tp-Tc)/(Tp+Tc)}1/2×100
The thickness of the polarizing region 11 is 15 μm or less, may be 13 μm or less, may be 10 μm or less, may be 8 μm or less, may be 5 μm or less, and is usually 1 μm or more. If the thickness of the polarizing region 11 exceeds the above range, workability for providing a cured product of an active energy ray-curable resin (X) including a curable resin (X) described later in the non-polarizing region 12 is likely to be reduced. In addition, when the polarization region 11 is smaller than the above range, it is difficult to obtain desired optical characteristics. The thickness of the polarizing region 11 can be measured, for example, by using a contact type film thickness measuring apparatus (MS-5C, manufactured by Nikon K.K.).
(unpolarized region)
In general, "unpolarized light" refers to light without regularity that can be observed in the electric field component. In other words, unpolarized light refers to random light for which no predominantly specific polarization state is observed. The "partially polarized light" refers to light in an intermediate state between polarized light and unpolarized light, and refers to light obtained by mixing at least 1 of linearly polarized light, circularly polarized light, and elliptically polarized light with unpolarized light. The non-polarizing region 12 in the polarizing plate 10 refers to a region where light transmitted through the non-polarizing region 12 (transmitted light) becomes non-polarized light or partially polarized light. In particular, the transmission light is preferably an unpolarized region of unpolarized light.
The non-polarizing region 12 of the polarizing plate 10 is a region surrounded by the polarizing region 11 in a plan view.
The non-polarizing region 12 contains a cured product of the curable resin (X). The non-polarizing region 12 is preferably a region in which a cured product of an active energy ray-curable resin composition containing a curable resin (X) described later is provided in a through hole provided in a polarizing plate (raw material polarizing plate 20) formed only of the polarizing region 11. The unpolarized region 12 has optical transparency.
By providing the non-polarizing region 12 of the polarizing plate 10 with light transmittance, optical transparency can be secured in the non-polarizing region 12. Thus, when the polarizing plate composite 40 is applied to a display device, a decrease in sensitivity and a decrease in design of the camera can be suppressed by disposing a printing portion such as a camera lens, an icon, or a logo so as to correspond to the non-polarizing region 12.
The plane shape of the non-polarizing region 12 is not particularly limited, and may be a circle; an oval shape; coin shape (Japanese original: small judgment shape); polygons such as triangles and quadrilaterals; at least 1 corner of the polygon is a rounded polygon with rounded corners (having the shape of R), etc.
The diameter of the non-polarizing region 12 is preferably 0.5mm or more, and may be 1mm or more, 2mm or more, and may be 3mm or more. The diameter of the non-polarizing region 12 is preferably 20mm or less, and may be 15mm or less, or may be 10mm or less, or may be 7mm or less. The diameter of the non-polarizing region 12 is the length of the longest straight line among straight lines connecting two arbitrary points on the outer periphery of the non-polarizing region 12.
The thickness of the cured product of the curable resin (X) provided in the non-polarizing region 12 may be the same as the thickness of the polarizing region 11, may be smaller than the thickness of the polarizing region 11, or may be larger than the thickness of the polarizing region 11. As described above, the cured product of the curable resin (X) provided in the unpolarized region 12 is preferably provided so as to fill the entire through-hole 22.
The thickness of the cured product provided in the non-polarizing region 12 may be measured by the method described above for measuring the thickness of the cured product provided in the polarizing plate composite 40. Specifically, in the above measurement method, the thickness of the cured product of the curable resin (X) may be determined by setting the 1 st plane as the surface of the polarizing region 11 of the polarizing plate 10 (the surface on the 1 st reinforcing material 50 side).
(cell region of reinforcing Material 1.)
The cell region 55 is a region where the 1 st cell 51 of the 1 st reinforcing material 50 exists. As shown in fig. 1 (b), the 1 st cell 51 has a hollow columnar (cylindrical) structure surrounded by cell partition walls 53 dividing the 1 st cell 51, and both axial ends of the columnar structure become open end faces. The 1 st cell 51 has a 1 st open end face disposed on a side of the polarizer composite 40 relatively close to the distance from the polarizer 10 and a 2 nd open end face disposed on a relatively distant side as open end faces. The cell regions 55 may be arranged such that at least one of the 1 st open end face and the 2 nd open end face is opposed to the polarizing plate 10, and preferably, both the 1 st open end face and the 2 nd open end face are opposed to the polarizing plate 10.
The shape of the opening of the 1 st cell 51 which the cell region 55 has is not particularly limited, and is preferably a polygon, a circle, or an ellipse. The shape of the opening on the 1 st opening end surface and the shape of the opening on the 2 nd opening end surface are preferably the same shape with the same size, but may be different shapes, or may be the same shape but different sizes. In addition, the shape of the openings of the 1 st cells 51 of the cell region 55 may be the same as or different from each other.
It is preferable that the cell region 55 has a plurality of 1 st cells 51 arranged in such a manner that the openings of the 1 st cells 51 are adjacent to each other in a plan view of the open end face. The plurality of 1 st cells 51 may be arranged such that the 1 st cells 51 are arranged without gaps therebetween when viewed from the top of the open end face, for example, as in the case where the shape of the opening of the 1 st cell 51 is hexagonal as shown in fig. 1 (b). Alternatively, the plurality of 1 st cells 51 may also be arranged as follows: in a plan view of the open end face, as in the case where the shape of the opening of the 1 st cell 51 is circular or the like, a part of the cell partition walls 53 of the plurality of 1 st cells 51 are connected, and arranged with a gap between the plurality of 1 st cells 51.
The cell region 55 of the 1 st reinforcing material 50, for example, as shown in fig. 1 (b), preferably has a honeycomb structure as follows: in both of the 1 st and 2 nd opening end faces, the opening has a hexagonal shape, and a plurality of 1 st cells 51 are arranged so that the openings are adjacent to each other without a gap in the plane direction of the polarizing plate composite 40.
The size of the opening of the 1 st cell 51 is not particularly limited, and preferably has a diameter smaller than that of the non-polarizing region 12. The diameter of the 1 st cells 51 is preferably 3mm or less, may be 2mm or less, may be 1mm or less, and is usually 0.1mm or more, and may be 0.5mm or more. The diameter of the opening of the 1 st cell 51 means the length on the straight line having the longest length among straight lines connecting any two points of the periphery of the opening.
The height of the 1 st cells 51 (the length in the direction orthogonal to the open end faces of the 1 st cells 51) is usually 0.1 μm or more, and may be 0.5 μm or more, and may be 1 μm or more, and may be 3 μm or more, and is usually 15 μm or less, and may be 13 μm or less, and may be 10 μm or less.
The cell partition wall 53 of the 1 st cell 51 dividing the cell region 55 preferably has light transmittance.
The line width of the cell partition walls 53 in the cell region 55 is, for example, 0.05mm or more, and may be 0.1mm or more, and may be 0.5mm or more, and may be 1mm or more, and is usually 5mm or less, and may be 3mm or less.
The cell partition walls 53 of the cell region 55 may be formed of, for example, a resin material or an inorganic oxide, preferably a resin material. Examples of the resin material include curable resins such as thermoplastic resins, thermosetting resins, and active energy ray-curable resins. Examples of the resin material include the curable resin (X)(ii) a Examples of the thermoplastic resin used as the filler include thermoplastic resins. As the inorganic oxide, silicon oxide (SiO) may be mentioned2) Alumina, and the like.
(non-cellular region of reinforcing Material 1.)
The non-cell region 56 is a region of the 1 st reinforcing material 50 where the 1 st cell 51 is not present, and as described above, is a region where the cell partition walls 53 constituting the 1 st cell 51 and the hollow columnar (cylindrical) space surrounded by the cell partition walls 53 are not present. The non-cell region 56 has through-holes 52 provided in a region corresponding to the through-holes 22 of the polarizing plate 10 so that the entire or a part of the plurality of 1 st cells 51 is cut out. The non-cell region 56 may contain a cured product of the curable resin (X) in the through-holes 52.
The planar shape and diameter of the non-cellular region 56 are not particularly limited, and the shapes and diameters exemplified as the planar shape of the non-polarizing region 12 can be cited. The planar shape and diameter of the non-cellular regions 56 are preferably the same as the planar shape and diameter of the non-polarizing regions 12.
(reinforcing material No. 2)
As shown in fig. 1 (c), the 2 nd cells 61 of the 2 nd reinforcing material 60 have a hollow columnar (cylindrical) structure surrounded by cell partition walls 63 partitioning the 2 nd cells 61, and both axial ends of the columnar structure become open end faces. The 2 nd cell 61 has a 1 st 'open end face disposed on a side of the polarizer composite 40 relatively close to the distance from the polarizer 10 and a 2 nd' open end face disposed on a relatively distant side as open end faces. The 2 nd reinforcing material 60 may be arranged such that at least one of the 1 st 'open end face and the 2 nd' open end face faces the polarizing plate 10, and preferably both the 1 st 'open end face and the 2 nd' open end face the polarizing plate 10.
The shape of the opening of the 2 nd cell 61 of the 2 nd reinforcing material 60 is exemplified by the shape of the opening of the 1 st cell 51. The shape of the opening on the 1 st 'opening end surface and the shape of the opening on the 2 nd' opening end surface are preferably the same shape with the same size, but may be different shapes, or may be the same shape but different sizes. In addition, the shapes of the openings of the plurality of 2 nd foam cells 61 may be the same as each other or may be different from each other.
The plurality of 2 nd cells 61 of the 2 nd reinforcing material 60 are preferably arranged such that the openings of the 2 nd cells 61 are adjacent to each other in a plan view of the open end face. The plurality of 2 nd cells 61 may be arranged such that the 2 nd cells 61 are arranged without gaps therebetween as in the case where the shape of the opening of the 2 nd cell 61 is hexagonal or the like as shown in fig. 1 (c), for example, when the open end surface is viewed in plan. Alternatively, the plurality of 2 nd cells 61 may also be arranged as follows: in a plan view of the open end face, as in the case where the shape of the opening of the 2 nd cell 61 is circular or the like, a part of the cell partition walls 63 of the plurality of 2 nd cells 61 are connected, and arranged with a gap between the plurality of 2 nd cells 61.
The 2 nd reinforcing material 60 preferably has a honeycomb structure in which a plurality of 2 nd cells 62 are arranged so that the shape of the openings is hexagonal in both of the 1 st 'open end face and the 2 nd' open end face and the openings are adjacent to each other in the plane direction of the polarizer composite 40 without a gap, as shown in fig. 1 (c), for example.
The size and height of the opening of the 2 nd cell 62 can be set to, for example, the size and height exemplified for the opening of the 1 st cell 51. The light transmittance, line width and material of the cell partition wall 63 of the 2 nd reinforcing material 60 that divides the 2 nd cell 61 may be set to, for example, the light transmittance, line width and material exemplified for the cell partition wall 53 that divides the 1 st cell 51.
(active energy ray-curable resin composition (curable resin composition))
The non-polarizing region 12 and the non-cell region 56 in the polarizer composite 40 are regions where a cured product of an active energy ray-curable resin (X)) is provided as described above, and are preferably formed from an active energy ray-curable resin composition (hereinafter, sometimes referred to as "curable resin composition") containing the curable resin (X). The curable resin (X) contained in the curable resin composition is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. The curable resin (X) is preferably an ultraviolet curable resin that is cured by irradiation of ultraviolet rays. The curable resin composition containing the curable resin (X) may be an active energy ray-curable adhesive, and in this case, an ultraviolet-curable adhesive is more preferable.
The curable resin composition is preferably solvent-free. The solvent-free type means that a solvent is not positively added, and specifically, the solvent-free type curable resin composition means that the content of the solvent is 5% by weight or less with respect to 100% by weight of the curable resin (X) contained in the curable resin composition.
The curable resin (X) preferably contains an epoxy compound. The epoxy compound is a compound having 1 or more, preferably 2 or more, epoxy groups in the molecule. Examples of the epoxy compound include alicyclic epoxy compounds, aliphatic epoxy compounds, and hydrogenated epoxy compounds (glycidyl ethers of polyhydric alcohols having an alicyclic ring). The epoxy compound contained in the curable resin (X) may be 1 kind or 2 or more kinds.
The content of the epoxy compound is preferably 40% by weight or more, more preferably 50% by weight or more, and further preferably 60% by weight or more, based on 100% by weight of the curable resin (X). The content of the epoxy compound may be 100% by weight or less, 90% by weight or less, 80% by weight or less, or 75% by weight or less based on 100% by weight of the curable resin (X).
The epoxy equivalent of the epoxy compound is usually 40 to 3000 g/equivalent, preferably 50 to 1500 g/equivalent. If the epoxy equivalent exceeds 3000 g/equivalent, compatibility with other components contained in the curable resin (X) may be lowered.
The epoxy compound contained in the curable resin (X) preferably contains an alicyclic epoxy compound. The alicyclic epoxy compound is an epoxy compound having 1 or more epoxy groups bonded to an alicyclic ring in a molecule. The "epoxy group bonded to an alicyclic ring" refers to a bridged oxygen atom-O-in the structure represented by the following formula. In the formula, m is an integer of 2 to 5.
[ chemical formula 1]
Figure BDA0003608344400000171
Removing (CH) in the above formula2)mThe compound in which 1 or more hydrogen atoms in the formula (b) are bonded to other chemical structures may be an alicyclic epoxy compound. (CH)2)m1 or more of the hydrogen atoms in (b) may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group. Among the alicyclic epoxy compounds, an epoxy compound having an oxabicyclohexane ring (an epoxy compound having m ═ 3 in the above formula) or an oxabicycloheptane ring (an epoxy compound having m ═ 4 in the above formula) is preferably used because it imparts excellent adhesion between the polarizing region 11 of the polarizing plate 10 and the cell region 55 of the 1 st reinforcing material 50 and the cured product of the curable resin (X) forming the non-polarizing region 12 and the non-cell region 56. The alicyclic epoxy compound to be preferably used is specifically exemplified below, but is not limited to these compounds.
[a] Epoxycyclohexanecarboxylic acid epoxycyclohexylmethyl esters represented by the following formula (IV):
[ chemical formula 2]
Figure BDA0003608344400000181
[ in the formula (IV), R8And R9Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
[b] Epoxycyclohexanecarboxylic acid esters of alkanediols represented by the following formula (V):
[ chemical formula 3]
Figure BDA0003608344400000182
[ in the formula (V), R10And R11Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and n represents an integer of 2 to 20.]
[c] Epoxycyclohexylmethyl esters of dicarboxylic acids represented by the following formula (VI):
[ chemical formula 4]
Figure BDA0003608344400000183
[ in the formula (VI), R12And R13Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and p represents an integer of 2 to 20.]
[d] Epoxycyclohexylmethyl ethers of polyethylene glycols of the formula (VII):
[ chemical formula 5]
Figure BDA0003608344400000184
[ in the formula (VII), R14And R15Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and q represents an integer of 2 to 10.]
[e] Epoxycyclohexylmethyl ethers of alkanediols represented by the following formula (VIII):
[ chemical formula 6]
Figure BDA0003608344400000191
[ in the formula (VIII), R16And R17Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and r represents an integer of 2 to 20.]
[f] A diepoxytriaspiro compound represented by the following formula (IX):
[ chemical formula 7]
Figure BDA0003608344400000192
[ in the formula (IX), R18And R19Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
[g] A diepoxy monoaspiro compound represented by the following formula (X):
[ chemical formula 8]
Figure BDA0003608344400000193
[ in the formula (X), R20And R21Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
[h] Vinylcyclohexene diepoxides of the following formula (XI):
[ chemical formula 9]
Figure BDA0003608344400000201
[ in the formula (XI), R22Represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
[i] Epoxycyclopentyl ethers of the following formula (XII):
[ chemical formula 10]
Figure BDA0003608344400000202
[ in the formula (XII), R23And R24Each independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
[j] Diepoxy tricyclodecanes represented by the following formula (XIII):
[ chemical formula 11]
Figure BDA0003608344400000203
[ in the formula (XIII), R25Represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.]
Examples of the aliphatic epoxy compound include polyglycidyl ethers of aliphatic polyhydric alcohols or alkylene oxide adducts thereof. More specifically, there may be mentioned diglycidyl ether of 1, 4-butanediol; a diglycidyl ether of 1, 6-hexanediol; triglycidyl ethers of glycerol; triglycidyl ether of trimethylolpropane; diglycidyl ethers of polyethylene glycol; a diglycidyl ether of propylene glycol; polyglycidyl ethers of polyether polyols obtained by adding 1 or 2 or more kinds of alkylene oxides (ethylene oxide, propylene oxide) to aliphatic polyols such as ethylene glycol, propylene glycol, and glycerin.
The hydrogenated epoxy compound is obtained by reacting epichlorohydrin with an alicyclic polyol obtained by hydrogenating an aromatic ring of an aromatic polyol. Examples of the aromatic polyol include bisphenol compounds such as bisphenol a, bisphenol F, and bisphenol S; novolac resins such as phenol novolac resin, cresol novolac resin, hydroxybenzaldehyde phenol novolac resin, and the like; and polyfunctional compounds such as tetrahydroxydiphenylmethane, tetrahydroxybenzophenone, and polyvinyl phenol. Preferred examples of the hydrogenated epoxy compound include hydrogenated diglycidyl ethers of bisphenol A.
The curable resin (X) may contain a (meth) acrylic compound and the like together with an active energy ray curable compound such as an epoxy compound. By using the (meth) acrylic compound in combination, effects of improving the adhesion between the polarizing region 11 of the polarizing plate 10 and the cell region 55 of the 1 st reinforcing material 50 and the cured product of the curable resin (X) forming the non-polarizing region 12 and the non-cell region 56, and the hardness and mechanical strength of the cured product of the curable resin (X) can be expected, and further, adjustment of the viscosity, curing speed, and the like of the curable resin (X) can be performed more easily. "(meth) acrylic acid" means at least one selected from acrylic acid and methacrylic acid.
The curable resin composition containing the curable resin (X) preferably contains a polymerization initiator. Examples of the polymerization initiator include cationic polymerization agents such as cationic photopolymerization agents and radical polymerization initiators. The photo cation polymerization initiator generates a cation species or lewis acid by irradiation of active energy rays such as visible rays, ultraviolet rays, X-rays, electron beams, and the like, and initiates a polymerization reaction of an epoxy group. As described above, the curable resin (X) is preferably an ultraviolet-curable resin that is cured by irradiation with ultraviolet rays, and the curable resin (X) preferably contains an alicyclic epoxy compound, and therefore, the polymerization initiator in this case is preferably a polymerization initiator that generates a cationic species or a lewis acid by irradiation with ultraviolet rays.
The curable resin composition may further contain additives such as photosensitizers, polymerization accelerators, ion scavengers, antioxidants, chain transfer agents, tackifiers, thermoplastic resins, fillers, flow control agents, plasticizers, defoaming agents, antistatic agents, and leveling agents.
(Filler)
The filler that can be provided in the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 is not particularly limited as long as it has light transmittance and can plug the internal space of the 1 st cell 51 of the 1 st reinforcing material 50 and the internal space of the 2 nd cell 61 of the 2 nd reinforcing material 60. The filler is preferably a material different from the material constituting the cell partition walls 53 of the 1 st reinforcing material 50 and the cell partition walls 63 of the 2 nd reinforcing material 60, and preferably contains a resin material. Examples of the resin material include 1 or more selected from curable resins such as thermoplastic resins, thermosetting resins, and active energy ray-curable resins, and may include adhesives and binders.
Examples of the thermoplastic resin include polyolefin resins such as chain polyolefin resins (e.g., polypropylene resins) and cyclic polyolefin resins (e.g., norbornene resins); cellulose ester resins such as triacetyl cellulose and diacetyl cellulose; polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate; a polycarbonate-based resin; (meth) acrylic resins; a polystyrene-based resin; a polyether resin; a polyurethane resin; a polyamide resin; a polyimide resin; fluorine-based resins, and the like.
Examples of the curable resin include the curable resin (X) described above.
The pressure-sensitive adhesive exhibits adhesiveness by attaching itself to an adherend, and is called a so-called pressure-sensitive adhesive. Examples of the adhesive include adhesives containing a polymer such as a (meth) acrylic polymer, a silicone polymer, a polyester polymer, a polyurethane polymer, a polyether polymer, or a rubber polymer as a main component.
In the present specification, the main component means a component contained in an amount of 50 mass% or more of the total solid content of the binder. The binder may be an active energy ray-curable type or a thermosetting type, and the crosslinking degree and the adhesive strength may be adjusted by irradiation with an active energy ray or heating.
The adhesive contains a curable resin component and is an adhesive other than a pressure-sensitive adhesive (pressure-sensitive adhesive). Examples of the adhesive include an aqueous adhesive in which a curable resin component is dissolved or dispersed in water, an active energy ray-curable adhesive containing an active energy ray-curable compound, and a thermosetting adhesive.
As the adhesive, a water-based adhesive commonly used in the technical field of polarizing plates may be used.
Examples of the resin component contained in the aqueous adhesive include a polyvinyl alcohol resin and a urethane resin. Examples of the active energy ray-curable adhesive include compositions that are cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. As the active energy ray-curable adhesive, a curable resin composition containing the curable resin (X) can be used. Examples of the thermosetting adhesive include thermosetting adhesives containing an epoxy resin, a silicone resin, a phenol resin, a melamine resin, or the like as a main component.
(method for producing polarizing plate Complex)
Fig. 4 and 5 are schematic cross-sectional views schematically showing an example of a method for producing the polarizing plate composite 40 (fig. 1 (a)). Fig. 4 and 5 show a case where the polarizing plate composite 40 shown in fig. 1 (a) is obtained, and the polarizing plate composite 40 shown in fig. 2 (a) and (b) can also be produced by the method described below. The polarizing plate composite 40 can be manufactured by, for example, forming a reinforcing material-forming structure 58 (hereinafter, sometimes referred to as "structure 58") that is composed only of the cell region 55 and does not have the non-cell region 56 on one surface side of the raw polarizing plate 20 having the same visibility correction polarization degree (Py) as a whole and that does not have the non-polarizing region 12. Since the raw material polarizing plate 20 is formed only by the polarizing regions 11 of the polarizing plate 10, the thickness of the raw material polarizing plate 20 is preferably equal to or less than 15 μm, which is the same thickness as the polarizing regions 11 of the polarizing plate 10. Structure 58 becomes cell region 55 of 1 st reinforcement 50 described above and therefore preferably has the same thickness as cell region 55 of 1 st reinforcement 50.
The polarizing plate composite 40 can be manufactured, for example, by the following steps. First, as shown in fig. 4 (a), after the 1 st support layer 25 is provided on one surface of the raw material polarizing plate 20 so as to be peelable from the raw material polarizing plate 20, the structure 58 is formed on the other surface of the raw material polarizing plate 20, and the 1 st laminate 31 is prepared. The structural body 58 can be obtained by forming cell partition walls 53 that partition the 1 st cells 51 on the surface of the raw material polarizing plate 20 using a resin material or an inorganic oxide, for example.
The method of forming the cell walls 53 using a resin material is not particularly limited, and examples thereof include printing methods such as inkjet printing, screen printing, and gravure printing; photoetching; coating methods using a nozzle, a die, or the like. In the above method, a resin composition obtained by mixing a resin material with a solvent, an additive, and the like can be used. Examples of the additives include leveling agents, antioxidants, plasticizers, tackifiers, organic or inorganic fillers, pigments, antioxidants, ultraviolet absorbers, and antioxidants. The cell partition wall 53 may be formed by curing or treating for curing the printed or coated resin composition as needed.
The method for forming the cell walls 53 using an inorganic oxide is not particularly limited, and the inorganic oxide can be formed by, for example, vapor deposition.
The prepared 1 st laminated body 31 is formed with a through hole 32 penetrating in the lamination direction by punching, shearing, cutting, laser cutting, or the like (fig. 4 (b)). Thus, the apertured polarizing plate 21 having the through-holes 22 formed in the raw polarizing plate 20 and the apertured structure 59 having the through-holes 52 formed in the structure 58 are formed in the 1 st support layer 25 having the through-holes formed therein. Next, after the 2 nd support layer 26 is provided in a peelable manner on the side of the open structure 59 of the 1 st stacked body 31 in which the through-holes 32 are formed (fig. 4 (c)), the 1 st support layer 25 is peeled off (fig. 4 (d)). Thus, a 2 nd laminate 33 in which the 2 nd support layer 26, the opening structure 59, and the opening polarizing plate 21 are laminated in this order is obtained (fig. 4 (d)). The 2 nd support layer 26 is provided so as to block one side of the through-holes 52 of the porous structures 59.
Next, the curable resin composition containing the curable resin (X) is filled in the through-holes 22 of the apertured polarizing plate 21 and the through-holes 52 of the apertured structure 59 of the 2 nd laminate 33, and the curable resin (X) in the through- holes 22 and 52 is cured by irradiation with active energy rays. As a result, a cured product of the curable resin (X) is formed in the through-hole 22 of the apertured polarizing plate 21 and the through-hole 52 of the apertured structure 59, and the 1 st reinforcing material 50 and the polarizing plate 10 are formed on the 2 nd support layer 26 ((a) of fig. 5). In the polarizing plate 10 shown in fig. 5 (a), the region other than the through-hole 22 of the apertured polarizing plate 21 is the polarizing region 11, and the region provided with the through-hole 22 of the cured product is the non-polarizing region 12. The 1 st reinforcing material 50 shown in fig. 5 (a) is provided on one surface side of the polarizing plate 10, and the region of the perforated structure 59 other than the through-holes 52 becomes the cell region 55, and the region of the through-holes 52 provided with the cured product becomes the non-cell region 56.
Next, a 2 nd reinforcing material 60 is formed on the side of the polarizing plate 10 opposite to the 1 st reinforcing material 50 side, and a polarizing plate complex 40 is formed on the 2 nd support layer 26 (fig. 5 (b)). The 2 nd reinforcing material 60 may be formed by, for example, the method described in the method of forming the cell partition walls 53 of the structure 58 to form the cell partition walls 63. After the 2 nd reinforcing material 60 is formed, the 2 nd support layer 26 may be peeled off.
The method for filling the curable resin composition into the through-holes 22 of the apertured polarizing plate 21 and the through-holes 52 of the apertured structure 59 is not particularly limited. For example, the curable resin composition may be injected into the through holes 22 and 52 of the 2 nd laminate 33 using a dispenser or the like, or the curable resin composition may be filled into the through holes 22 and 52 while the curable resin composition is applied to the surface of the apertured polarizing plate 21 of the 2 nd laminate 33. The cured product layer of the curable resin composition applied to the surface of the aperture polarizing plate 21 may serve as a protective layer described later. In the case of coating the curable resin composition, the substrate film may be provided so as to cover the surface of the coating layer formed by coating. The substrate film may be peeled off after curing of the curable resin (X).
The 1 st support layer 25 may be a support layer used in the production of the raw polarizing plate 20 described later, or the above-described substrate film used in the application of the curable resin composition may be used.
Alternatively, the pressure-sensitive adhesive sheet may be a releasable support layer that is bonded to the raw material polarizing plate 20 with a volatile liquid such as water, or may be a pressure-sensitive adhesive sheet that is releasable from the raw material polarizing plate 20. The 2 nd support layer 26 may be a releasable support layer that is bonded to the apertured polarizing plate 21 by a volatile liquid such as water bonding, or may be a pressure-sensitive adhesive sheet that is releasable from the apertured polarizing plate 21.
As described above, in the polarizing plate composite 40, the depth of the through-hole 22 provided in the apertured polarizing plate 21 can be made 15 μm or less by making the thickness of the raw polarizing plate 2015 μm or less. Since the height of the 1 st cell 51 of the open-cell structure 59 is also usually 15 μm or less, the depth of the through-hole 52 provided in the open-cell structure 59 may also be 15 μm or less. This makes it possible to fill the through-holes 22 of the apertured polarizing plate 21 and the through-holes 52 of the apertured structure 59 with the curable resin composition in a short time and to cure the curable resin (X) contained in the curable resin composition filled in the through- holes 22, 52, and therefore, a reduction in workability can be suppressed.
In the method for manufacturing the polarizing plate composite 40, the through-hole 32 is formed in the 1 st laminate 31 including the structure 58, the raw polarizing plate 20, and the 1 st support layer 25 in this order. Since the raw polarizing plate 20 is formed as a region to be the non-polarizing region 12 of the polarizing plate 10 and has a thickness of 15 μm or less, when the through-hole 22 is formed in the raw polarizing plate 20, there is a possibility that defects such as cracks may occur around the through-hole 22. In the method for manufacturing the polarizing plate composite 40, since the structure 58 is provided on the raw polarizing plate 20 and the through-hole 22 is formed in a state where the raw polarizing plate 20 is reinforced by the structure 58, the occurrence of cracks in the apertured polarizing plate 21 can be suppressed, and the polarizing plate 10 in which the occurrence of cracks is suppressed can be obtained.
(raw material polarizing plate)
The raw material polarizing plate 20 is preferably not significantly denatured by active energy rays irradiated for curing the curable resin (X) in the curable resin composition filled in the through-holes 22. The raw material polarizing plate 20 is, for example, a film in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol resin film, or a film in which a dichroic dye is oriented in a cured layer of a polymerizable liquid crystal compound, and the production method thereof is as described above for the polarizing region 11.
(Structure for Forming reinforcing Material (Structure))
Structure 58 is a structure that consists only of cell regions 55 and does not have non-cell regions 56. As described above, the structural body 58 can be obtained by forming the cell dividing walls 53 that divide the 1 st cells 51 using a resin material or an inorganic oxide. As materials that can be used as the resin material and the inorganic oxide, and methods for forming the cell partition walls 53 using them, the above exemplified materials and methods can be cited.
< optical laminate >
Fig. 6 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present embodiment. The optical laminate 45 shown in fig. 6 has protective layers 17 and 18 on both sides of the polarizing plate composite 40 shown in fig. 1 (a). The optical laminate 45 may have the protective layer 17 (or 18) only on one side of the polarizing plate composite 40. The polarizing plate composite 40 included in the optical laminate 45 may be the polarizing plate composite 40 shown in fig. 2 (a) or (b). The protective layers 17 and 18 may be provided on the polarizer composite 40 via a pressure-sensitive adhesive layer such as an adhesive layer or an adhesive layer. In this case, for example, a film-like protective layer may be laminated on the polarizing plate composite 40 via the adhesive layer. The protective layers 17 and 18 may be in direct contact with the polarizer composite 40 without interposing a bonding layer therebetween. In this case, the protective layers 17 and 18 can be formed, for example, by applying a composition containing a resin material constituting the protective layers 17 and 18 onto the polarizing plate composite 40 and curing or hardening the applied layer.
In the case where the optical laminate 45 is provided with the protective layers 18 and 17 on the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 of the polarizer composite 40 with the adhesive layers interposed therebetween, the adhesive layers are preferably provided so as to fill the internal space of the 1 st cell 51 of the 1 st reinforcing material 50, the gaps between the plurality of 1 st cells 51, the internal space of the 2 nd cell 61 of the 2 nd reinforcing material 60, the gaps between the plurality of 2 nd cells 61, and the like, thereby forming the protective layers 18 and 17.
In the case where the optical laminate 45 is provided with the protective layers 18, 17 on the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 of the polarizer composite 40, respectively, in direct contact, it is preferable to form the protective layers 18, 17 by providing a composition containing a resin material constituting the protective layers 18, 17 in such a manner as to fill the internal space of the 1 st cell 51 of the 1 st reinforcing material 50, the gap between the plurality of 1 st cells 51, the internal space of the 2 nd cell 61 of the 2 nd reinforcing material 60, the gap between the plurality of 2 nd cells 61, and the like.
In the optical layered body 45, the protective layers 18 and 17 may be cured layers of the curable resin (X) directly provided on the 1 st reinforcing material 50 and the 2 nd reinforcing material 60, respectively. The curable resin (X) constituting the protective layers 18 and 17 as the cured product layer is not particularly limited as long as it is a resin that is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays, and examples thereof include the curable resin (X) described above. The protective layers 18 and 17 may be cured layers of a curable resin composition containing the same curable resin (X) as the curable resin (X) constituting the cured product contained in the non-polarizing region 12 and the non-cell region 56 of the polarizing plate 10.
In order to manufacture the optical laminate 45, for example, a curable resin composition is applied to the 1 st reinforcing material 50 and the 2 nd reinforcing material 60 side of the polarizing plate composite 40, and the curable resin (X) is cured by irradiation with active energy rays. In this way, the protective layers 18 and 17, which are cured layers of the curable resin (X), can be formed on the 1 st reinforcing material 50 and the 2 nd reinforcing material 60, respectively, to obtain the optical laminate 45.
In the optical laminate 45 shown in fig. 6, one of the protective layers 17 and 18 may be a protective layer provided with a bonding layer interposed therebetween, and the other may be a protective layer provided without a bonding layer interposed therebetween. The protective layers 17 and 18 included in the optical layered body 45 may be the same as or different from each other.
In the case of coating the curable resin composition, the substrate film may be provided so as to cover the surface of the coating layer formed by coating. In this case, the base film may be used as the protective layers 17 and 18, and the cured product layer of the curable resin (X) may be used as the bonding layer for bonding the protective layers 17 and 18. The substrate film may be peeled off after curing of the curable resin (X).
(protective layer)
The protective layers 17 and 18 are preferably resin layers capable of transmitting light, and may be resin films or coating layers formed by coating a composition containing a resin material. The resin used in the resin layer is preferably a thermoplastic resin having excellent transparency, mechanical strength, thermal stability, moisture barrier properties, isotropy, stretchability, and the like. Examples of the thermoplastic resin include those constituting a base film that can be used for producing the raw material polarizing plate 20. When the optical layered body 45 has the protective layers 17 and 18 on both surfaces, the resin compositions of the protective layers 17 and 18 may be the same as each other or may be different from each other.
From the viewpoint of thinning, the thickness of the protective layers 17 and 18 is usually 200 μm or less, preferably 150 μm or less, more preferably 100 μm or less, and may be 80 μm or less, or may be 60 μm or less. The thickness of the protective layers 17, 18 is usually 5 μm or more, and may be 10 μm or more, or 20 μm or more. The protective layers 17 and 18 may or may not have a phase difference. When the optical layered body 45 has the protective layers 17 and 18 on both surfaces, the thicknesses of the protective layers 17 and 18 may be the same or different from each other.
(laminating layer)
The adhesive layer is an adhesive layer or an adhesive layer. Examples of the adhesive for forming the adhesive layer and the adhesive for forming the adhesive layer include adhesives and binders for constituting the filler.
< laminate having adhesive layer for optical display element >
The polarizing plate composite 40 shown in fig. 1 and 2 and the optical laminate 45 shown in fig. 6 may further include a bonding layer for an optical display element to be bonded to an optical display element (liquid crystal panel, organic EL element) of a display device such as a liquid crystal display device or an organic EL display device.
In the polarizing plate composite 40 and the optical laminate 45, when the adhesive layer for an optical display element is provided on the surface of the 1 st reinforcing material 50 or the 2 nd reinforcing material 60, the filler may be filled into the internal space of the 1 st cell 51 of the 1 st reinforcing material 50 or the internal space of the 2 nd cell 61 of the 2 nd reinforcing material 60, or the like, and the adhesive layer for an optical display element may be formed while using a material constituting the adhesive layer for an optical display element as the filler provided in the 1 st reinforcing material 50 or the 2 nd reinforcing material 60.
Description of the reference numerals
10: polarizing plate, 11: polarization region, 11 m: 1 st plane, 11 n: plane 2, 12: non-polarizing region, 17, 18: protective layer, 20: raw material polarizing plate, 21: apertured polarizer, 22: through-hole, 25: support layer 1, 26: support layer 2, 27: support layer 3, 28: 4 th support layer, 31: 1 st stacked body, 32: through-hole, 33: 2 nd stack, 34: stack 3, 35: 4 th stacked body, 36: through-hole, 40, 41: polarizing plate complex, 45: optical laminate, 50: reinforcing material No. 1, 51: 1 st cell, 52: through-hole, 53: cell partition, 55: cell area, 56: non-cellular region, 58: reinforcing material forming structure, 59: open-cell structure, 60: reinforcing material No. 1, 61: 2 nd cell, 63: cell walls.

Claims (12)

1. A polarizing plate composite comprising: a polarizing plate, a 1 st reinforcing material provided on one surface side of the polarizing plate, and a 2 nd reinforcing material provided on the other surface side of the polarizing plate,
the polarizing plate has a polarizing region having a thickness of 15 [ mu ] m or less and a non-polarizing region surrounded by the polarizing region in a plan view,
the 1 st reinforcing material has a plurality of 1 st cells having open end faces and arranged in such a manner that each open end face is opposed to a face of the polarizing plate,
the 1 st reinforcing material has a cell region where the 1 st cell is present and is present in a region corresponding to the polarization region, and a non-cell region where the 1 st cell is not present and is present in a region corresponding to the non-polarization region,
the 2 nd reinforcing material has a plurality of 2 nd cells having open end faces and arranged in such a manner that each open end face is opposed to a face of the polarizing plate,
the 2 nd cell is present at least in a region corresponding to the non-polarizing region,
the non-polarizing region and the non-cell region contain a cured product of an active energy ray-curable resin, and the cured product contained in the non-polarizing region is provided in a through hole surrounded by the polarizing region in a plan view.
2. The polarizing plate composite according to claim 1, wherein a thickness of the cured product is the same as a total thickness of a thickness of the polarizing region and a thickness of the cell region.
3. The polarizing plate composite according to claim 1, wherein a thickness of the cured product is less than a total thickness of a thickness of the polarizing region and a thickness of the cell region.
4. The polarizing plate composite according to claim 1, wherein a thickness of the cured product is larger than a total thickness of a thickness of the polarizing region and a thickness of the cell region.
5. The polarizing plate complex according to any one of claims 1 to 4, wherein the non-polarizing region has light transmittance.
6. The polarizing plate composite according to any one of claims 1 to 5, wherein the non-polarizing region has a diameter of 0.5mm or more and 20mm or less in a plan view.
7. The polarizing plate composite according to any one of claims 1 to 6, wherein the active energy ray-curable resin contains an epoxy compound.
8. The polarizer composite according to claim 7, wherein the epoxy compound comprises an alicyclic epoxy compound.
9. The polarizer composite according to any one of claims 1 to 8, wherein the shape of the opening of the 1 st cell and the 2 nd cell is each independently a polygon, a circle, or an ellipse.
10. The polarizing plate composite according to any one of claims 1 to 9, wherein a light-transmitting filler is further provided in an inner space of the 1 st cell.
11. The polarizing plate composite according to any one of claims 1 to 10, wherein a light-transmitting filler is further provided in an inner space of the 2 nd cell.
12. An optical laminate comprising a polarizer composite according to any one of claims 1 to 11 and a protective layer on one surface or both surfaces of the polarizer composite.
CN202080073998.1A 2019-10-25 2020-08-27 Polarizing plate composite and optical laminate Pending CN114631044A (en)

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PCT/JP2020/032327 WO2021079614A1 (en) 2019-10-25 2020-08-27 Polarizer complex and optical laminate

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CN114599515A (en) * 2019-10-25 2022-06-07 住友化学株式会社 Polarizing plate composite and optical laminate

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JP6214594B2 (en) 2014-04-25 2017-10-18 日東電工株式会社 Polarizer, polarizing plate and image display device
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JP2018128664A (en) * 2017-02-10 2018-08-16 日東電工株式会社 Polarizing film, image display device, and manufacturing method of the polarizing film
WO2019017483A1 (en) * 2017-07-21 2019-01-24 富士フイルム株式会社 Liquid crystal display device
CN114599515A (en) * 2019-10-25 2022-06-07 住友化学株式会社 Polarizing plate composite and optical laminate

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