WO2021079623A1

WO2021079623A1 - Polarizer composite and optical laminate

Info

Publication number: WO2021079623A1
Application number: PCT/JP2020/033059
Authority: WO
Inventors: 寿和松本
Original assignee: 住友化学株式会社
Priority date: 2019-10-25
Filing date: 2020-09-01
Publication date: 2021-04-29
Also published as: JP2021067871A; JP7404029B2; CN114599515B; TW202120312A; KR20220084372A; CN114599515A

Abstract

A polarizer composite that has a polarizer, a phase difference layer and a first reinforcing material that are provided on one surface side of the polarizer, and a second reinforcing material that is provided on the other surface side of the polarizer. The polarizer has a polarizing region that is no more than 15 μm thick and a non-polarizing region that is surrounded by the polarizing region as seen in plan view. The phase difference layer has a phase difference region and a non–phase difference region. The first reinforcing material has a cell region and a non-cell region. The second reinforcing material has a plurality of second cells that each have an opening end surface. The opening end surfaces are arranged to face the surface of the polarizer, and there are second cells in at least a region that corresponds to the non-polarizing region. The non-polarizing region, the non–phase difference region, and the non-cell region each include a cured product of an actinic-ray-curable resin.

Description

Polarizer complex and optical laminate

The present invention relates to a polarizer complex and an optical laminate.

The polarizer is widely used as a polarization supply element in a display device such as a liquid crystal display device or an organic electroluminescence (EL) display device, and as a polarization detection element. Display devices equipped with a polarizer have also been deployed in mobile devices such as notebook personal computers and mobile phones, and due to demands for diversification of display purposes, clarification of display categories, decoration, etc., the transmittance is high. Polaritators with different regions are required. In particular, in small and medium-sized mobile terminals such as smartphones and tablet terminals, a polarizer may be attached to the entire display surface in order to design the entire surface without boundaries from the viewpoint of decorativeness. In this case, since the polarizer may overlap the area of the camera lens and the area of the icon or logo printing at the bottom of the screen, there is a problem that the sensitivity of the camera is deteriorated or the design is inferior.

For example, in Patent Document 1, a low-concentration portion of a dichroic substance having a relatively low content of a dichroic substance is partially provided in a polarizer contained in a polarizing plate, and the low-concentration portion of the dichroic substance corresponds to the low-concentration portion of the dichroic substance. It is described that the camera is arranged so as not to adversely affect the camera performance.

JP-A-2015-215609

In Patent Document 1, the resin film is partially decolorized to form a low-concentration portion of the bicolor substance by subjecting the resin film containing the bicolor substance to a chemical treatment in which a basic solution is brought into contact with the resin film. The basic solution used for decolorization requires labor and cost to be treated as a waste liquid. Further, Patent Document 1 describes that when iodine as a dichroic substance is used, the iodine content can be reduced and a low concentration portion of the dichroic substance can be formed by contacting with a basic solution. ing. However, there is no disclosure about a specific method for forming a low-concentration portion of a dichroic substance when a dichroic substance other than iodine is used.

An object of the present invention is to provide a polarizer complex and an optical laminate having a novel polarizer instead of a polarizer in which a region having a low content of a dichroic substance is formed by a chemical treatment such as decolorization.

The present invention provides the following polarizer complexes and optical laminates.
[1] Polarized light having a polarizing element, a retardation layer and a first reinforcing material provided on one surface side of the polarizer, and a second reinforcing material provided on the other surface side of the polarizer. It ’s a child complex,
The polarizer has a polarized region having a thickness of 15 μm or less and a non-polarized region surrounded by the polarized region in a plan view.
The retardation layer has a retardation characteristic and exists in a region corresponding to the polarization region, and a non-phase difference having no retardation characteristic and exists in a region corresponding to the non-polarized region. Has an area and
The first reinforcing material is
It has a plurality of first cells having an open end face, and each open end face is arranged so as to face the surface of the polarizer.
It has a cell region in which the first cell exists and exists in a region corresponding to the polarized light region, and a non-cell region in which the first cell does not exist and exists in a region corresponding to the non-polarized region. ,
The second reinforcing material is
It has a plurality of second cells having an open end face, and each open end face is arranged so as to face the surface of the polarizer.
The second cell exists in at least the region corresponding to the non-polarized region,
The non-polarized region, the non-phase difference region, and the non-cell region contain a cured product of an active energy ray-curable resin.
The cured product contained in the non-polarized region is provided in a through hole surrounded by the polarized region in a plan view.
The cured product contained in the non-phase difference region is a polarizer complex provided in a through hole surrounded by the retardation region in a plan view.
[2] The polarizer composite according to [1], wherein the retardation layer and the first reinforcing material are provided in this order from the polarizer side.
[3] The polarizer composite according to [1], wherein the first reinforcing material and the retardation layer are provided in this order from the polarizer side.
[4] Any of [1] to [3], wherein the thickness of the cured product is the same as the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex. The polarizer complex described in Crab.
[5] Any one of [1] to [3], wherein the thickness of the cured product is smaller than the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex. The polarizer complex described in.
[6] Any one of [1] to [3], wherein the thickness of the cured product is larger than the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex. The polarizer complex described in.
[7] The polarizer complex according to any one of [1] to [6], wherein the retardation region is a polymerization cured layer of a polymerizable liquid crystal compound.
[8] The polarizer complex according to any one of [1] to [7], wherein the non-polarized region has translucency.
[9] The polarizer complex according to any one of [1] to [8], wherein the diameter of the non-polarized region in a plan view is 0.5 mm or more and 20 mm or less.
[10] The polarizer complex according to any one of [1] to [9], wherein the active energy ray-curable resin contains an epoxy compound.
[11] The polarizer complex according to [10], wherein the epoxy compound contains an alicyclic epoxy compound.
[12] The polarized light according to any one of [1] to [11], wherein the shape of the opening of the first cell and the second cell is independently polygonal, circular, or elliptical. Child complex.
[13] The polarizer complex according to any one of [1] to [12], wherein a translucent filler is provided in the internal space of the first cell.
[14] The polarizer complex according to any one of [1] to [13], wherein a translucent filler is provided in the internal space of the second cell.
[15] An optical laminate having a protective layer on one side or both sides of the polarizer complex according to any one of [1] to [14].

According to the present invention, it is possible to provide a polarizer complex and an optical laminate having a novel polarizer.

(A) is a schematic cross-sectional view schematically showing an example of the polarizer complex of the present invention, and (b) is a schematic plan view of the polarizer complex shown in (a) on the first reinforcing material side. Yes, (c) is a schematic plan view of the polarizer complex shown in (a) on the second reinforcing material side. (A) and (b) are schematic cross-sectional views schematically showing another example of the polarizer complex of the present invention. (A) and (b) are diagrams schematically showing an example of a cross section around a non-polarized region, a non-polarized region, and a non-cell region of a polarizer complex, and are a non-polarized region and a non-polarized region. , And an explanatory diagram for explaining a method of determining the thickness of the cured product provided in the non-cell region. It is schematic cross-sectional view which shows another example of the polarizer complex of this invention schematically. (A) to (d) are schematic cross-sectional views schematically showing an example of the method for producing a polarizer complex of the present invention. (A) to (c) are schematic cross-sectional views schematically showing a continuation of the method for producing a polarizer complex shown in FIG. (A) to (c) are schematic cross-sectional views schematically showing a continuation of the method for producing a polarizer complex shown in FIG. (A) to (e) are schematic cross-sectional views schematically showing another example of the method for producing a polarizer complex of the present invention. (A) to (d) are schematic cross-sectional views schematically showing a continuation of the method for producing a polarizer complex shown in FIG. It is schematic cross-sectional view which shows typically an example of the optical laminated body of this invention. It is the schematic sectional drawing which shows another example of the optical laminated body of this invention schematically.

Hereinafter, preferred embodiments of the polarizer complex of the present invention and the optical laminate will be described with reference to the drawings. In all the drawings below, the scales are appropriately adjusted to make each component easier to understand, and the scale of each component shown in the drawings does not necessarily match the scale of the actual component.

<Polarizer complex>
(Polarizer complex (1))
FIG. 1 (a) is a schematic cross-sectional view schematically showing an example of the polarizer complex of the present embodiment, and FIG. 1 (b) is a first reinforcing material side of the polarizer complex shown in (a). 1 (c) is a schematic plan view of the polarizer composite shown in (a) on the second reinforcing member side. 2 (a) and 2 (b) are schematic cross-sectional views schematically showing another example of the polarizer complex of the present embodiment. The polarizer complex 40 shown in FIGS. 1 and 2 includes a polarizer 10, a retardation layer 71, a first reinforcing member 50, and a second reinforcing member 60. The polarizer complex 40 has a retardation layer 71 and a first reinforcing member 50 on one surface side of the polarizer 10 in this order, and has a second reinforcing member 60 on the other surface side of the polarizer 10.

As shown in FIG. 1A, the polarizer 10 included in the polarizer complex 40 has a polarized region 11 and a non-polarized region 12. The thickness of the polarized light region 11 is 15 μm or less. The non-polarized region 12 is a region surrounded by the polarized region 11 in the plan view of the polarizer 10.

The arrangement of the polarized light region 11 and the non-polarized light region 12 in the polarizer 10 is not particularly limited as long as the polarized light region 11 is provided so as to surround the non-polarized light region 12. In a plan view of the polarizer 10, the total area occupied by the polarized region 11 is preferably larger than the total area occupied by the non-polarized region 12. The polarizer 10 may have one non-polarized region 12 and may have two or more non-polarized regions 12. When two or more non-polarized regions 12 are provided, the shapes of the non-polarized regions 12 may be the same or different from each other.

The retardation layer 71 can be provided on one surface side of the polarizer 10 via a bonding layer (not shown). Examples of the bonding layer include an adhesive layer or an adhesive layer. Examples of the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer and the adhesive for forming the adhesive layer include the pressure-sensitive adhesive and the adhesive used for forming the filler described later. As shown in FIG. 1A, the retardation layer 71 has a retardation region 75 having a retardation characteristic and a non-phase difference region 76 having no retardation characteristic. The retardation region 75 refers to a region in which at least one of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) is more than 40 nm at a wavelength of 590 nm. The non-phase difference region 76 refers to a region in which the in-plane retardation value (R0) and the thickness direction retardation value (Rth) are 40 nm or less, respectively, at a wavelength of 590 nm.

The in-plane retardation value (R0) is a phase difference value in a direction (in-plane direction) perpendicular to the thickness direction of the retardation layer 70, and can be obtained by the following equation (I). The thickness direction retardation value (Rth) is a thickness direction retardation value of the retardation layer 70, and can be obtained by the following equation (II).
Both the in-plane retardation value (R0) and the thickness direction retardation value (Rth) are measured with light having a wavelength of 590 nm at a temperature of 23 ° C.
R0 = (Nx-Ny) x d (I)
Rth = [{(Nx + Ny) / 2} -Nz] x d (II)
[In formula (I) and formula (II),
Nx is the refractive index in the direction in which the in-plane refractive index is maximized (that is, in the slow axis direction).
Ny is the refractive index in the direction orthogonal to the slow phase axis in the plane (that is, the phase advance axis direction).
Nz is the refractive index in the thickness direction.
d is the thickness [nm] of the retardation layer. ]
The in-plane retardation value (R0) and the thickness direction retardation value (Rth) can be measured by, for example, a birefringence measuring device (trade name KOBRA-WPR) manufactured by Oji Measuring Instruments Co., Ltd.

In the retardation layer 71 included in the polarizer complex 40, the retardation region 75 exists in the region corresponding to the polarization region 11 of the polarizer 10, and the non-phase difference region 76 corresponds to the non-polarizing region 12 of the polarizer 10. It exists in the area where it is used. Here, the fact that the retardation region 75 exists in the region corresponding to the polarization region 11 means that the retardation region 75 and the polarization region 11 have substantially the same shape and substantially the same dimensions in the plan view direction, and similarly. The fact that the non-polarized region 76 is in the region corresponding to the non-polarized region 12 means that the non-polarized region 76 and the non-polarized region 12 are at substantially the same position, substantially the same shape, and substantially the same dimensions (diameter) in the plan view direction. ). In other words, when the non-phase difference region 76 is projected onto the polarizer 10 in the plan view direction, the projected region of the non-phase difference region 76 and the non-polarizing region 12 on the polarizer 10 are substantially the same. Say that. According to the means for producing a polarizer complex described later, a polarizer complex in which the retardation region 75 exists in a region corresponding to the polarization region 11 can be efficiently manufactured. When the polarizer 10 included in the polarizer complex 40 has two or more non-polarizing regions 12, if the non-phase difference region 76 exists in the region corresponding to at least one non-polarizing region 12, the other A phase difference region 75 may exist in the region corresponding to the non-polarized region 12.

The polarizer complex 40 may have one retardation layer 71 on one surface side of the polarizing element 10, or may have two or more retardation layers 71. When two or more retardation layers are provided, the retardation layers may be laminated with each other via a bonding layer, and a retardation layer may be further provided on the side of the first reinforcing material 50 opposite to the polarizer 10 side. May be good. The retardation characteristics of two or more retardation layers may be the same or different from each other. In the polarizer complex 40, when a retardation layer is further provided on the side of the first reinforcing member 50 opposite to the polarizer 10 side, the retardation layer may be the retardation layer 71, and the entire retarder complex may be the retardation layer 71. It may be a retardation layer composed of regions (a retardation layer having no non-phase difference layer).

As shown in FIG. 1B, the first reinforcing member 50 included in the polarizer complex 40 has a plurality of first cells 51 having open end faces, and each open end face faces the surface of the polarizer 10. It is arranged so that it does. The first reinforcing member 50 has a cell region 55 in which the first cell 51 exists and a non-cell region 56 in which the first cell 51 does not exist. The first cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell partition wall 53 that partitions the first cell 51, and has an open end surface in which both ends in the axial direction of the columnar structure are open. is there. The non-cell region 56 in which the first cell 51 does not exist is an region in which a hollow columnar (cylindrical) space surrounded by the cell partition wall 53 and the cell partition wall 53 constituting the first cell 51 does not exist.

In the first reinforcing material 50, the cell region 55 exists in the region corresponding to the polarizing region 11 existing in the polarizer 10, and the non-cell region 56 exists in the region corresponding to the non-polarizing region 12 of the polarizer 10. .. Here, the fact that the cell region 55 exists in the region corresponding to the polarization region 11 means that the cell region 55 and the polarization region 11 have substantially the same shape and substantially the same dimensions in the plan view direction, and similarly, they are not. The fact that the cell region 56 is in the region corresponding to the non-polarized region 12 means that the non-cell region 56 and the non-polarized region 12 have substantially the same shape and substantially the same dimensions (diameter) at substantially the same position in the plan view direction. To say. In other words, when the non-cell region 56 is projected onto the polarizer 10 in the plan view direction, the projected region of the non-cell region 56 and the non-polarizing region 12 in the polarizer 10 are substantially the same. Say. According to the means for producing a polarizer complex described later, a polarizer complex in which the cell region 55 exists in a region corresponding to the polarizing region 11 can be efficiently manufactured. When the polarizer 10 included in the polarizer complex 40 has two or more non-polarized regions 12, if the non-cell region 56 is present in the region corresponding to at least one non-polarized region 12, the other non-polarized region 56 is present. The cell region 55 may exist in the region corresponding to (projecting) the polarized light region 12. It is preferable that at least one non-cell region 56 is provided in a region corresponding to the non-polarized region 12 and a region corresponding to the non-phase difference region 76.

As shown in FIG. 1 (c), the second reinforcing member 60 of the polarizer complex 40 has a plurality of second cells 61 having open end faces, and each open end face faces the surface of the polarizer 10. It is arranged so that it does. Like the first cell 51, the second cell 61 has a hollow columnar (cylindrical) structure surrounded by a cell partition wall 63 for partitioning the second cell 61, and both ends of the columnar structure in the axial direction are opened. It is an open end face. In the second reinforcing material 60, unlike the first reinforcing material 50, the second cell 61 also exists in the region corresponding to the non-polarized region 12 (the portion shown by the wavy line in FIG. 1C).
In the second reinforcing material 60, it is preferable that the second cell 61 is present in both the polarized region 11 and the non-polarized region 12, and it is more preferable that the second cell 61 is present on the entire surface of the polarizer 10.

The non-polarizing region 12 of the polarizer 10, the non-polarizing region 76 of the retardation layer 71, and the non-cell region 56 of the first reinforcing member 50 are active energy ray-curable resins (hereinafter, “curable resin (X)””. Including the cured product of.). The non-polarized 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 polarized region 11 in a plan view. The non-phase difference region 76 is surrounded by the retardation region 75 in a plan view, and a cured product of the curable resin (X) is provided in the through hole 72 provided in the region corresponding to the through hole 22 described above. The area. The non-cell region 56 is provided so as to cut out all or a part of the plurality of first cells 51, and the curable resin (X) is formed in the through hole 52 provided in the region corresponding to the through hole 22 described above. This is the area where the cured product of.

The through hole 22 of the polarizing element 10, the through hole 72 of the retardation layer 71, and the through hole 52 of the first reinforcing member 50 can have the same shape in a plan view. The through holes 22, 72, 52 can be communicated with each other in the thickness direction of the polarizing region 11, and a cured product of the curable resin (X) is provided over the through

holes

22, 72, 52 that communicate with each other. Can be done.

As shown in FIG. 1A, the polarizer 10 included in the polarizer complex 40 has a non-polarizing region 12. Therefore, when the polarizing element composite 40 is applied to a display device such as a liquid crystal display device or an organic EL display device developed in a smartphone or a tablet terminal, the camera lens and the icon correspond to the non-polarizing region 12. Alternatively, by arranging a printing portion such as a logo, it is possible to suppress a decrease in the sensitivity of the camera and a decrease in the design. In particular, in the polarizer complex 40, the retardation layer 71 has a non-phase difference region 76. Therefore, by arranging a printing portion such as a camera lens, an icon, or a logo corresponding to the non-polarized region 12 and the non-phase difference region 76, it is possible to further suppress the deterioration of the sensitivity and the design of the camera. it can.

Since the polarizer 10 has a non-polarized region 12, it is considered that cracks are likely to occur around the non-polarized region 12 due to the contraction of the polarizer 10 due to a temperature change received when applied to a display device or the like. Further, since the polarizing element 10 has a thin polarization region 11 of 15 μm or less, it is considered that cracks are likely to occur when it receives an impact. In the polarizer complex 40, since the polarizer 10 is provided between the first reinforcing member 50 and the second reinforcing member 60 as described above, cracks may occur when a temperature change or impact is applied, and cracks may occur. It is considered that it is possible to suppress the progress of fine cracks to large cracks.

In the polarizer complex 40, the non-polarizing region 12, the non-phase difference region 76, and the non-cell region 56 contain a cured product of the curable resin (X), so that the through hole 22 of the polarizer 10 and the retardation layer 71 The through hole 72 of the first reinforcing member 50 and the through hole 52 of the first reinforcing member 50 can be solid. Since the polarizer 10 of the polarizer complex 40 has a thin thickness of 15 μm or less, if the non-polarizing region 12 is not provided with a cured product of the curable resin (X) and the through hole 22 is hollow, There is a risk of problems such as cracks occurring around the through hole 22 due to shrinkage of the polarizer due to temperature changes that are exposed when applied to a display device. On the other hand, the non-polarizing region 12 and the non-phase difference region 75 are provided by providing the cured product of the curable resin (X) in the through

holes

22, 72, 52 like the polarizing element 10 of the polarizing element complex 40. , And the non-cell region 56 can be solid, so that the occurrence of the above-mentioned problems can be suppressed.

The thickness of the cured product of the curable resin (X) provided in the polarizer complex 40 is the same as the thickness of the laminated structure portion including the polarizing region 11, the retardation region 75, and the cell region 55 in the polarizer complex 40. It may be (FIG. 1 (a)), smaller than the thickness of the laminated structure portion (FIG. 2 (a)), or larger than the thickness of the laminated structure portion (FIG. 2 (b)). ). The thickness of the laminated structure portion may be the total thickness of the thickness of the polarization region 11, the retardation region 75, and the thickness of the cell region 55, and the total thickness includes the polarization region 11, the retardation region 75, and the like. The thickness of the layer interposed between the cell region 55 and the cell region 55 may be included. For example, when the polarizer complex 40 has a bonding layer between the polarizer 10 and the retardation layer 71, the thickness of the laminated structure portion is the thickness of the polarizing region 11 and the thickness of the retardation region 75. The thickness of the laminated layer is also added to the total thickness of. The cured product of the curable resin (X) provided in the polarizer complex 40 is at least a part of the through hole 22 of the polarizer 10, at least a part of the through hole 72 of the retardation layer 71, and a first reinforcing material. It suffices if it is provided so as to fill at least a part of the through hole 52 of 50. When the polarizer complex 40 has a bonding layer between the polarizing element 10 and the retardation layer 71, the curable resin (X) is made of a curable resin (X) so as to fill at least a part of the through holes provided in the bonding layer. It suffices if a cured product is provided. The cured product of the curable resin (X) is preferably provided so as to fill the entire through hole 22 of the polarizer 10, the entire through hole 22 of the polarizer 10, the entire through hole 72 of the retardation layer 71, and the first. It is more preferable that the reinforcing member 50 is provided so as to fill the entire through hole 52 and the entire through hole of the bonding layer.

The thickness of the laminated structure portion including the polarizing region 11, the retardation layer region 75, and the cell region 55 in the polarizer complex 40 is preferably 30 μm or less, more preferably 25 μm or less, and more preferably 20 μm or less. More preferably, it may be 18 μm or less, 16 μm or less, and usually 2 μm or more. When the thickness of the laminated structure portion exceeds the above range, workability for providing a cured product of the curable resin (X) in the non-polarizing region 12, the non-phase difference region 76, and the non-cell region 56 becomes as described later. Easy to drop. The thickness can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Corporation). The thickness of the cell region corresponds to the height of the first cell 51 (the length in the direction orthogonal to the opening end surface of the first cell 51).

The thickness of the cured product provided on the polarizer complex 40 is determined as follows. First, in the polarizer complex 40, a first plane including the surface of the polarizing region 11 of the polarizer 10 (the surface opposite to the retardation layer 71 side) and the open end surface of the cell region 55 of the first reinforcing member 50. It is assumed that the second plane includes (the open end surface on the side opposite to the polarizer 10 side). Next, in the non-polarized region 12, the first position where the shortest distance between the surface of the cured product and the first plane on the polarizer 10 side is the maximum, and the cured product on the first reinforcing member 50 side. The second position where the shortest distance between the surface and the second plane is maximized is determined. Then, the value (dm + dn + D), which is the sum of the shortest distance (dm) at the first position, the shortest distance (dn) at the second position, and the distance (D) between the first plane and the second plane, is set as the polarizer complex. It is the thickness of the cured product provided in 40.

The thickness of the cured product of the curable resin (X) provided in the non-polarizing region 12, the non-phase difference region 76, and the non-cell region 56, and the polarization region 11, the retardation region 75, and the cell in the polarizer complex 40. A method for determining the thickness when the thickness of the laminated structure portion including the region 55 is different will be specifically described with reference to FIG. 3 (a) and 3 (b) are diagrams schematically showing an example of a cross section around a non-polarized region, a non-phase difference region, and a non-cell region of a polarizer complex, and are a non-polarized region and a non-polarized region. It is explanatory drawing for demonstrating the method of determining the thickness of the cured product provided in the phase difference region and the non-cell region.

When a cured product is provided in the non-polarized region 12, the non-phase difference region 76, and the non-cell region 56 as shown in FIG. 3A, the first reinforcing member 50 is on the opposite side to the retardation layer 71. It is assumed that the straight line in the non-cell region 56 along the surface side is the first plane 11 m. Of the straight lines having the shortest distance connecting an arbitrary point on the first plane 11 m and an arbitrary point on the surface of the cured product provided in the non-cell region 56, the length of the straight line (FIG. 3). The position when "dm") in (a) is maximized is set as the first position. Next, as shown in FIG. 3A, it is assumed that the straight line indicated by the alternate long and short dash line in the non-polarized region 12 along the surface side of the polarizer 10 opposite to the retardation layer 71 side is the second plane 11n. To do. Of the straight lines having the shortest distance connecting an arbitrary point on the second plane 11n and an arbitrary point on the surface of the cured product provided in the non-polarized region 12, the length of the straight line (FIG. 3). The position when "dn") in (a) is maximized is defined as the second position. Here, as shown in FIG. 3A, the surfaces of the cured product provided in the non-cell region 56 and the non-polarized region 12 are the first plane 11 m and the second in the thickness direction of the polarizer complex 40. When it exists on the inner surface side (the retardation layer 71 side) of the plane 11n, dm and dn are shown as negative values. Further, let D be the distance between the first plane 11m and the second plane 11n (corresponding to the thickness of the laminated structure portion). Then, the thickness of the cured product provided in the non-polarized region 12, the non-phase difference region 76, and the non-cell region 56 shown in FIG. 3A is determined as D + dm + dn (dm and dn are negative values). Can be done.

Further, as shown in FIG. 3B, when the cured product is provided in the non-polarized region 12, the non-phase difference region 76, and the non-cell region 56, the first plane 11 m and the second plane are the same as described above. By assuming the plane 11n, the thickness of the cured product provided in the non-polarized region 12, the non-phase difference region 76, and the non-cell region 56 can be determined. Specifically, first, among the straight lines having the shortest distance, the straight line connecting an arbitrary point on the first plane 11 m and an arbitrary point on the surface of the cured product provided in the non-cell region 56 is the straight line. The position when the length (“dm” in FIG. 3B) is maximized is set as the first position. Next, among the straight lines having the shortest distance connecting an arbitrary point on the second plane 11n and an arbitrary point on the surface of the cured product provided in the non-polarized region 12, the length of the straight line ( The position when “dn”) in FIG. 3 (b) is maximized is defined as the second position. Here, as shown in FIG. 3B, the surfaces of the cured product provided in the non-cell region 56 and the non-polarized region 12 are the first plane 11 m and the second in the thickness direction of the polarizer complex 40. When it exists on the outer surface side (opposite side of the retardation layer 71 side) from the plane 11n, dm and dn are shown as positive values. Then, the thickness of the cured product provided in the non-polarized region 12, the non-phase difference region 76, and the non-cell region 56 shown in FIG. 3B is determined as D + dm + dn (dm and dn are positive values). Can be done.

The polarizer complex 40 is applied to a display device or the like with the polarizer 10, the retardation layer 71, the first reinforcing member 50, and the second reinforcing member 60. When the internal space of the first cell 51 of the first reinforcing material 50 and the second cell 61 of the second reinforcing material 60 is hollow, the difference in refractive index between the cell partition wall 53 and the internal space of the first cell 51, and The visibility of the display device may decrease due to a difference in the refractive index between the cell partition 63 and the internal space of the second cell 61. Therefore, a translucent filler may be provided in the internal space of the first cell 51 of the first reinforcing material 50 and the internal space of the second cell 61 of the second reinforcing material 60 in the polarizer complex 40. preferable. In the first reinforcing material 50 and the second reinforcing material 60 of the polarizer complex 40, when a gap is provided between the plurality of first cells 51 or between the plurality of second cells 61 as described later. , It is preferable that a translucent filler is also provided in this gap. Such a filler will be described later.

In the present specification, the translucency refers to the property (transmittance) of transmitting 80% or more of visible light in the wavelength range of 400 nm to 700 nm, preferably 85% or more, and more preferably 90% or more. , 92% or more transparent is more preferable. The definition of "translucency" below and the preferable range of transmittance for visible light are the same as above.

(Polarizer complex (2))
FIG. 4 is a schematic cross-sectional view schematically showing another example of the polarizer complex of the present embodiment. The polarizer complex 41 shown in FIG. 4 has a polarizer 10, a retardation layer 71, a first reinforcing member 50, and a second reinforcing member 60. The polarizer complex 41 has a first reinforcing member 50 and a retardation layer 71 on one surface side of the polarizer 10 in this order, and has a second reinforcing member 60 on the other surface side of the polarizer 10.
The polarizer 10, the retardation layer 71, the first reinforcing material 50, and the second reinforcing material 60 are as described above.

The retardation layer 71 can be provided on the side of the first reinforcing member 50 opposite to the polarizer 10 via a bonding layer (not shown). Examples of the bonding layer include the pressure-sensitive adhesive layer or the adhesive layer described in the above-mentioned polarizer complex 40. It is preferable that the bonding layer interposed between the first reinforcing material 50 and the retardation layer 71 is also provided in the internal space of the first cell 51 of the first reinforcing material 50. If the internal space of the first cell 51 of the first reinforcing member 50 is hollow, the visibility of the display device may decrease due to the difference in refractive index between the cell partition wall 53 and the internal space of the first cell 51. Therefore, the display device is provided by providing a material constituting the bonding layer interposed between the first reinforcing material 50 and the retardation layer 71 so as to fill the internal space of the first cell 51 of the first reinforcing material 50. It is possible to suppress a decrease in visibility in. When a gap is provided between the plurality of first cells 51 as described later, it is preferable that a material forming the bonding layer is also provided in this gap.

The polarizer complex 41 may have one retardation layer 71 on the opposite side of the first reinforcing material 50 from the polarizer 10, and may have two or more retardation layers 71. May be good. When having two or more retardation layers, the retardation layers can be laminated with each other via a bonding layer, and the retardation characteristics may be the same or different from each other. When the polarizer complex 41 further has a retardation layer on the side of the first reinforcing material 50 opposite to the polarizer 10 side, the retardation layer may be the retardation layer 71, and the entire retarder complex may be a retardation layer 71. It may be a retardation layer composed of regions (a retardation layer having no non-phase difference layer).

Similar to the above-mentioned polarizer complex 40, the polarizer complex 41 further suppresses a decrease in camera sensitivity and a decrease in design by arranging a printing portion such as a camera lens, an icon, or a logo. It is possible to suppress the occurrence of the above-mentioned problems. Further, in the polarizer complex 41, since the first reinforcing member 50 and the second reinforcing member 60 are provided on both sides of the polarizer 10, cracks in the polarizer 10 that occur when a temperature change or an impact is applied are provided. It is considered that it is possible to suppress the progress of fine cracks to large cracks.

The thickness of the cured product of the curable resin (X) provided in the polarizer complex 41 is the same as the thickness of the laminated structure portion including the retardation region 75, the polarizing region 11, and the cell region 55 in the polarizer complex 40. It may be present (FIG. 4), may be smaller than the thickness of the laminated structure portion, or may be larger than the thickness of the laminated structure portion. The cured product of the curable resin (X) provided in the polarizer complex 41 is at least a part of the through hole 72 of the retardation layer 71, at least a part of the through hole 22 of the polarizer 10, and the first reinforcing material. It suffices if it is provided so as to fill at least a part of the through hole 52 of 50. The cured product of the curable resin (X) is preferably provided so as to fill the entire through hole 22 of the polarizer 10, the entire through hole 72 of the retardation layer 71, the entire through hole 22 of the polarizer 10, and the first. 1 It is more preferable that the reinforcing member 50 is provided so as to fill the entire through hole 52.

The thickness of the laminated structure portion including the retardation region 75, the polarizing region 11 and the cell region 55 in the polarizer complex 41 is preferably 30 μm or less, more preferably 25 μm or less, and more preferably 20 μm or less. Is more preferable, and it may be 18 μm or less, 16 μm or less, and usually 2 μm or more. When the thickness of the laminated structure portion exceeds the above range, workability for providing a cured product of the curable resin (X) in the non-phase difference region 76, the non-polarizing region 12, and the non-cell region 56 becomes as described later. Easy to drop. The thickness and the method for measuring the thickness are as described above.

The thickness of the cured product provided on the polarizer complex 41 may be measured according to the method for measuring the thickness of the cured product provided on the polarizer complex 40 described above. Specifically, in the above measuring method, the first plane is a plane including the surface of the retardation region 75 of the retardation layer 71 (the surface opposite to the polarizing element 10 side) of the curable resin (X). The thickness of the cured product may be determined.

The second reinforcing material 60 is applied to a display device or the like in a state of being contained in the polarizer composite 41. Therefore, as described in the above-described polarizer complex 40, a translucent filler is provided in the internal space of the second cell 61 of the second reinforcing material 60 and in the gap between the plurality of second cells 61. Is preferable.

The first reinforcing material 50 and the second reinforcing material 60 included in the

polarizing element complexes

40 and 41 described above have the same shape and size as the first cell 51 and the second cell 61, respectively. Also, at least one of the shape and size may be different from each other. The opening of the first cell 51 of the first reinforcing member 50 and the opening of the second cell 61 of the second reinforcing member 60 provided in the polarizer 10 may be arranged so as to overlap each other in a plan view. , It is preferable that they are arranged so as to be offset from each other.

The

polarizer complexes

40 and 41 described above may be circularly polarizing plates. In this case, the retardation region 75 of the retardation layer 71 can have a retardation characteristic that functions as a 1/4 wave plate. When the

polarizer complexes

40 and 41 are circular polarizing plates, two or more retardation layers may be provided on one surface side of the polarizer 10. For example, on one surface side of the polarizer 10, the retardation characteristics of the retardation region 75 are in the order of [a] 1/2 wave plate and 1/4 wave plate, and [b] 1/4 wavelength of inverse wavelength dispersibility. The retardation layer 71 may be laminated so that the plates and the positive C plate are arranged in this order, or [c] the positive C plate and the 1/4 wave plate having the opposite wavelength dispersibility are arranged in this order.

The

polarizer complexes

40 and 41 may be single-wafered bodies, or may be long bodies having a length that is wound into a roll shape during storage, transportation, or the like. The planar shape and size of the

polarizer complexes

40 and 41 are not particularly limited.

(Polarized region)
The polarization region 11 of the polarizer 10 preferably exhibits absorption dichroism at wavelengths in the wavelength range of 380 nm to 780 nm. The polarizer 10 has a property of absorbing linearly polarized light having a vibration plane parallel to its absorption axis and transmitting linearly polarized light having a vibration plane orthogonal to the absorption axis (parallel to the transmission axis). It can be obtained mainly by the polarization region 11.

The polarizing region 11 is a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, an ethylene / vinyl acetate copolymerization system partially saponified film, and two colors such as iodine and a dichroic dye. Dichroic substances are adsorbed and oriented; dichroic substances are adsorbed and oriented on a polyene-based orientation film or liquid crystal compound oriented, such as a dehydrated product of polyvinyl alcohol or a dehydrogenated product of polyvinyl chloride. Things; etc. can be used. Among them, as one having excellent optical characteristics, it is preferable to use a film obtained by dyeing a polyvinyl alcohol-based film with iodine and uniaxially stretching it.

First, a method for producing a polyvinyl alcohol-based film, which is a preferable polarization region 11, obtained by dyeing with iodine and uniaxially stretching the film will be briefly described.

Dyeing with iodine is performed, for example, by immersing a polyvinyl alcohol-based film in an aqueous iodine solution. The draw ratio of uniaxial stretching is preferably 3 to 7 times. Stretching may be performed after the dyeing treatment or while dyeing. Alternatively, it may be stretched and then dyed.

The polyvinyl alcohol-based film is subjected to swelling treatment, cross-linking treatment, cleaning treatment, drying treatment and the like, if necessary. For example, by immersing a polyvinyl alcohol-based film in water and washing it with water before dyeing, not only can the dirt on the surface of the polyvinyl alcohol-based film and the blocking inhibitor be washed, but also the polyvinyl alcohol-based film is swollen and dyed. It is possible to prevent unevenness and the like.

The stretching treatment, dyeing treatment, cross-linking treatment (boric acid treatment), washing treatment, and drying treatment of the polyvinyl alcohol-based resin film may be carried out according to, for example, the method described in Japanese Patent Application Laid-Open No. 2012-159778. In the method described in this document, the polyvinyl alcohol-based resin layer to be the polarization region 11 is formed by coating the base film with the polyvinyl alcohol-based resin. At this time, the base film used can also be used as the first support layer 25, which will be described later.

Subsequently, the polarization region 11 in which the dichroic dye is adsorbed and oriented on the oriented liquid crystal compound will be briefly described. The polarization region 11 in this case is a liquid crystal compound as described in, for example, JP-A-2013-373353, JP-A-2013-33249, JP-A-2016-170368, JP-A-2017-83843, and the like. You may use the one in which the dichroic dye is oriented in the cured film which is polymerized with. As the dichroic dye, a dye having absorption in the wavelength range of 380 to 800 nm can be used, and it is preferable to use an organic dye. Examples of the dichroic dye include an azo compound. The liquid crystal compound is a liquid crystal compound that can be polymerized while being oriented, and can have a polymerizable group in the molecule. The cured film obtained by polymerizing such a liquid crystal compound may be formed on the base film, and in that case, the base film can also be used as the first support layer 25 described later.

It is also preferable that after the polarizing film used for the polarizing region 11 is produced as described above, the non-polarizing region 12 is formed by drilling to form the polarizer 10. In the present specification, the polarizing film formed only in such a polarizing region 11 may be referred to as a raw material polarizer 20.

The luminous efficiency correction polarization degree (Py) of the polarized light region 11 is preferably 80% or more, more preferably 90% or more, further preferably 95% or more, and particularly preferably 99% or more. The simple substance transmittance (Ts) of the polarized light region 11 is usually less than 50% and may be 46% or less. The simple substance transmittance (Ts) of the polarized light 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 simple substance transmittance (Ts) is a Y value measured in accordance with the JIS Z8701 2 degree field of view (C light source) and corrected for luminosity factor. Luminous efficiency correction The degree of polarization (Py) and the single transmittance (Ts) can be measured using, for example, an ultraviolet-visible spectrophotometer (manufactured by JASCO Corporation, product name: V7100), and the luminous efficiency is corrected. It is calculated by the following formula based on the parallel transmittance Tp and the orthogonal transmittance Tc.
Py [%] = {(Tp-Tc) / (Tp + Tc)} ^1/2 x 100

(Non-polarized region)
Generally, "non-polarized light" refers to light having no observable regularity in the electric field component. In other words, unpolarized light is random light in which no particular dominant specific polarization state is observed. Further, "partially polarized light" refers to light in an intermediate state between polarized light and unpolarized light, and means light in which at least one of linearly polarized light, circularly polarized light, and elliptically polarized light is mixed with non-polarized light. The non-polarized region 12 in the polarizer 10 means that the light (transmitted light) transmitted through the non-polarized region 12 is unpolarized or partially polarized. In particular, a non-polarized region in which the transmitted light is non-polarized is preferable.

The non-polarized region 12 of the polarizer 10 is a region surrounded by the polarized region 11 in a plan view.
The non-polarized region 12 contains a cured product of the curable resin (X). The non-polarizing region 12 is a curing of an active energy ray-curable resin composition containing a curable resin (X) described later in a through hole provided in a polarizer (raw material polarizer 20) formed only in the polarizing region 11. It is preferable that the object is provided. The non-polarized region 12 has translucency.

Since the non-polarizing region 12 of the polarizer 10 has translucency, a predetermined transparency can be ensured in the non-polarizing region 12. As a result, when the

polarizer complexes

40 and 41 are applied to the display device, the sensitivity of the camera is lowered by arranging the printing portion such as the camera lens, the icon or the logo corresponding to the non-polarized region 12. It is possible to suppress the deterioration of the design.

The planar shape of the non-polarized region 12 is not particularly limited, but is circular; elliptical; oval; polygon such as triangle or quadrangle; rounded corners in which at least one corner of the polygon is rounded (shape having R). It can be a polygon or the like.

The diameter of the non-polarized region 12 is preferably 0.5 mm or more, and may be 1 mm or more, 2 mm or more, or 3 mm or more. The diameter of the non-polarized region 12 is preferably 20 mm or less, may be 15 mm or less, may be 10 mm or less, or may be 7 mm or less. The diameter of the non-polarized region 12 means the length of the longest straight line connecting arbitrary two points on the outer circumference of the non-polarized region 12.

The thickness of the cured product of the curable resin (X) provided in the non-polarized region 12 may be the same as the thickness of the polarized region 11, or may be smaller than the thickness of the polarized region 11, and the thickness of the polarized region 11 may be smaller. It may be larger than the thickness. As described above, the cured product of the curable resin (X) provided in the non-polarized region 12 is preferably provided so as to fill the entire through hole 22.

The thickness of the cured product provided in the non-polarized region 12 may be measured according to the method for measuring the thickness of the cured product provided in the polarizer complex 40 described above. Specifically, in the above measuring method, the curable resin (X) is set as the surface of the polarizing region 11 of the polarizer 10 on the opposite side of the surface of the polarization region 11 that is included in the first plane. The thickness of the cured product may be determined.

(Cell area of the first reinforcing material)
The cell region 55 is an region in which the first cell 51 of the first reinforcing member 50 exists. As shown in FIG. 1B, the first cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell partition wall 53 that partitions the first cell 51, and both ends of the columnar structure in the axial direction are It is an open end face. The first cell 51 is arranged as an opening end surface on a side relatively far from the first opening end surface arranged on a side in which the distance between the

polarizer complexes

40 and 41 and the polarizer 10 is relatively short. It has two open end faces. The cell region 55 may be arranged so that at least one of the first open end face and the second open end face faces the polarizer 10, and both the first open end face and the second open end face are polarized. It is preferable that they are arranged so as to face the child 10.

The shape of the opening of the first cell 51 included in the cell region 55 is not particularly limited, but is preferably a polygonal shape, a circular shape, or an elliptical shape. The shape of the opening on the first opening end face and the shape of the opening on the second opening end face are preferably the same shape of the same size, but may be different shapes, and the same shape and size may be used. It may be different. Further, the shapes of the openings of the plurality of first cells 51 included in the cell region 55 may be the same as each other or may be different from each other.

It is preferable that the plurality of first cells 51 included in the cell region 55 are arranged so that the openings of the first cells 51 are adjacent to each other in the plan view of the opening end face. In the plan view of the opening end faces of the plurality of first cells 51, the first cells 51 have no gaps with each other, as in the case where the opening shape of the first cell 51 shown in FIG. 1B is hexagonal or the like. It may be arranged so as to be arranged. Alternatively, the plurality of first cells 51 are in contact with a part of the cell partition walls 53 of the plurality of first cells 51 as in the case where the shape of the opening of the first cell 51 is circular or the like in the plan view of the opening end face. It may be arranged so as to be arranged with a gap between the plurality of first cells 51.

As shown in FIG. 1B, for example, the cell region 55 of the first reinforcing member 50 has a hexagonal opening shape in both the first opening end face and the second opening end face, and the polarizer complex 40, It is preferable to have a honeycomb structure in which a plurality of first cells 51 are arranged so that the openings are arranged adjacent to each other without a gap in the plane direction of 41.

The size of the opening of the first cell 51 is not particularly limited, but it is preferable to have a diameter smaller than the diameter of the non-polarized region 12. The diameter of the first cell 51 is preferably 3 mm or less, may be 2 mm or less, may be 1 mm or less, and is usually 0.1 mm or more, and may be 0.5 mm or more. .. The diameter of the opening of the first cell 51 refers to the length of the longest straight line connecting arbitrary two points on the outer circumference of the opening.

The height of the first cell 51 (the length in the direction orthogonal to the opening end surface of the first cell 51) is usually 0.1 μm or more, may be 0.5 μm or more, or may be 1 μm or more. It may be 3 μm or more, usually 15 μm or less, 13 μm or less, or 10 μm or less.

The cell partition wall 53 that partitions the first cell 51 of the cell region 55 preferably has translucency.

The line width of the cell partition wall 53 of the cell region 55 is, for example, 0.05 mm or more, 0.1 mm or more, 0.5 mm or more, 1 mm or more, and also. It is usually 5 mm or less, and may be 3 mm or less.

The cell partition wall 53 of the cell region 55 can be formed of, for example, a resin material or an inorganic oxide, and is preferably formed of a resin material. Examples of the resin material include a thermoplastic resin, a thermosetting resin, a curable resin such as an active energy ray-curable resin, and the like. Examples of the resin material include the above-mentioned curable resin (X); the thermoplastic resin exemplified as the thermoplastic resin used for the above-mentioned filler. Examples of the inorganic oxide include silicon oxide (SiO ₂ ) and aluminum oxide.

(Non-cell area of the first reinforcing material)
The non-cell region is a region in which 56, the first cell 51 of the first reinforcing member 50 does not exist, and as described above, a hollow columnar (cylinder) surrounded by the cell partition wall 53 and the cell partition wall 53 constituting the first cell 51. It is an area where there is no space. The non-cell region 56 is provided so as to cut out all or a part of the plurality of first cells 51, and has a through hole 52 provided in a region corresponding to the through hole 22 of the polarizer 10. The non-cell region 56 can contain a cured product of the curable resin (X) in the through hole 52.

The planar shape and diameter of the non-cell region 56 are not particularly limited, and examples thereof include the shape and diameter exemplified as the planar shape of the non-polarized region 12. The planar shape and diameter of the non-cell region 56 are preferably the same as the planar shape and diameter of the non-polarized region 12.

(2nd reinforcement)
As shown in FIG. 1 (c), the second cell 61 included in the second reinforcing member 60 has a hollow columnar (cylindrical) structure surrounded by the cell partition wall 63 for partitioning the second cell 61, and has a columnar structure. The structure is an open end face with both ends open in the axial direction. The second cell 61 is arranged as an opening end surface on a side relatively far from the first'opening end surface, which is arranged on a side in which the distance between the

polarizer complexes

40 and 41 and the polarizer 10 is relatively short. It has a second'open end face. The second reinforcing member 60 may be arranged so that at least one of the first'open end face and the second'open end face faces the polarizer 10, and the first'open end face and the second'opening may be arranged. It is preferable that both end faces are arranged so as to face the polarizer 10.

Examples of the shape of the opening of the second cell 61 of the second reinforcing material 60 include those exemplified by the shape of the opening of the first cell 51. The shape of the opening on the 1st'opening end face and the shape of the opening on the 2nd'opening end face are preferably the same shape, but may be different shapes, and the same shape and size. May be different. Further, the shapes of the openings of the plurality of second cells 61 may be the same as each other or may be different from each other.

It is preferable that the plurality of second cells 61 included in the second reinforcing member 60 are arranged so that the openings of the second cells 61 are adjacent to each other in the plan view of the opening end face. In the plan view of the opening end faces of the plurality of second cells 61, the second cells 61 have no gaps with each other, as in the case where the opening shape of the second cell 61 shown in FIG. 1C is hexagonal or the like. It may be arranged so as to be arranged. Alternatively, the plurality of second cells 61 are in contact with a part of the cell partition walls 63 of the plurality of second cells 61, as in the case where the shape of the opening of the second cell 61 is circular or the like in the plan view of the opening end face. It may be arranged so as to be arranged with a gap between the plurality of second cells 61.

As shown in FIG. 1 (c), for example, the second reinforcing member 60 has a hexagonal opening shape in both the first'open end face and the second'open end face, and is in the plane direction of the polarizer composite 40. It is preferable to have a honeycomb structure in which a plurality of second cells 62 are arranged so that the openings are arranged adjacent to each other without a gap.

The size and height of the opening of the second cell 62 can be, for example, the size and height exemplified for the opening of the first cell 52. The translucency, line width, and material of the cell bulkhead 63 partitioning the second cell 61 of the second reinforcing material 60 are, for example, the translucency, line width, and the material exemplified for the cell bulkhead 53 partitioning the first cell 51. And can be a material.

(Phase difference region)
The retardation layer 71 has a retardation characteristic, and this property can be mainly obtained by the retardation region 75. At least one of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) at the wavelength of 590 nm in the retardation region 75 is more than 40 nm, and each may be independently 100 nm or more. It may be 500 nm or more, 1000 nm or more, and usually 15000 nm or less.

The phase difference region 75 can have, for example, a phase difference characteristic that functions as a 1/4 wave plate, a 1/2 wave plate, a 1/4 wave plate having a reverse wavelength dispersion, or a positive C plate. As described above, a plurality of types of retardation layers having different retardation characteristics can be laminated to form a retardation region 75.

The retardation region 75 can be a region formed by the raw material retardation layer, which will be described later as a whole, which is a retardation region. When a plurality of types of retardation layers having different retardation characteristics are laminated to form the retardation region 75, the stacking of the plurality of types may be used as the raw material retardation layer. Therefore, the retardation region 75 is formed of a material constituting the raw material retardation layer described later, and can specifically include a thermoplastic resin. The retardation region can be formed, for example, by a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, a polymerized cured layer of a polymerizable liquid crystal compound, or the like.

The thickness of the retardation region 75 is preferably 15 μm or less, 13 μm or less, 10 μm or less, 8 μm or less, 5 μm or less, and usually 1 μm. That is all.

(Non-phase difference region)
The non-phase difference region 76 of the retardation layer 71 is a region surrounded by the retardation region 75 in a plan view. The in-plane retardation value (R0) and the thickness direction retardation value (Rth) at the wavelength of 590 nm in the non-phase difference region 76 are 40 nm or less, and each may be independently 35 nm or less, or 30 nm or less. It may be, it may be 20 nm or less, or it may be 0 nm.

The non-phase difference region 76 can contain a cured product of the curable resin (X) in the through hole 72 surrounded by the retardation region 75 in a plan view. The thickness of the cured product of the curable resin (X) provided in the non-phase difference region 76 may be the same as the thickness of the retardation region 75, or may be smaller than the thickness of the non-phase difference region 76. It may be larger than the thickness of the non-phase difference region 76. As described above, the cured product of the curable resin (X) provided in the non-phase difference region 76 is preferably provided so as to fill the entire through hole 72. As will be described later, by providing such a non-phase difference region 76 in correspondence with the non-polarized region 12, when the

polarizer composites

40 and 41 are applied to the display device, the non-polarized region 12 and the non-polarized region 12 and the non-polarized region 12 are provided. By arranging a printing portion such as a camera lens, an icon, or a logo corresponding to the phase difference region 76, it is possible to suppress a decrease in camera sensitivity and a decrease in design.

The thickness of the cured product provided in the non-phase difference region 76 may be measured according to the method for measuring the thickness of the cured product provided in the polarizer complex 40 described above. Specifically, in the above measuring method, the first plane and the second plane are used as one surface and the other surface of the retardation region 75 of the retardation layer 71, respectively, and the thickness of the cured product of the curable resin (X) is used. Should be decided.

The planar shape and diameter of the non-phase difference region 76 are not particularly limited, and examples thereof include the shape and diameter exemplified as the planar shape of the non-polarized region 12. It is preferable that the plane shape and diameter of the non-polarization region 76 are the same as the plane shape and diameter of the non-polarizing region 12, respectively.

(Active energy ray curable resin (curable resin (X)))
As described above, a cured product of an active energy ray-curable resin (curable resin (X)) is provided in the non-polarized region 12, the non-cell region 56, and the non-phase difference region 76 in the

polarizer composites

40 and 41. It is a region, and is preferably formed of an active energy ray-curable resin composition containing the curable resin (X) (hereinafter, may be referred to as a “curable resin composition”). 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 with 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 a solvent-free type. The solvent-free type means that no solvent is positively added. Specifically, the solvent-free type curable resin composition is a curable resin contained in the curable resin composition. X) It means that the content of the solvent is 5% by weight or less with respect to 100% by weight.

The curable resin (X) preferably contains an epoxy compound. The epoxy compound is a compound having one or more, preferably two or more epoxy groups in the molecule. Examples of the epoxy compound include an alicyclic epoxy compound, an aliphatic epoxy compound, and a hydride epoxy compound (glycidyl ether of a polyol having an alicyclic ring). The epoxy compound contained in the curable resin (X) may be one kind or two 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 with respect to 100% by weight of the curable resin (X). preferable. The content of the epoxy compound may be 100% by weight or less, 90% by weight or less, or even 80% by weight or less with respect to 100% by weight of the curable resin (X). However, it may be 75% by weight or less.

The epoxy equivalent of the epoxy compound is usually in the range of 40 to 3000 g / equivalent, preferably 50 to 1500 g / equivalent. If the epoxy equivalent exceeds 3000 g / equivalent, the compatibility with other components contained in the curable resin (X) may decrease.

The epoxy compound contained in the curable resin (X) preferably contains an alicyclic epoxy compound. The alicyclic epoxy compound is an epoxy compound having one or more epoxy groups bonded to the alicyclic in the molecule. The "epoxy group bonded to the alicyclic" means a bridging oxygen atom-O-in the structure represented by the following formula. In the following formula, m is an integer of 2 to 5.

A compound in which _{one or more hydrogen atoms in the (CH 2} ) _m in the above formula are bonded to another chemical structure can be an alicyclic epoxy compound. One or more hydrogen atoms in (CH ₂ ) _m may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group. Among the alicyclic epoxy compounds, the epoxy compound having an oxabicyclohexane ring (m = 3 in the above formula) and an oxabicycloheptane ring (m = 4 in the above formula) is the polarization region of the polarizer 10. 11. The curable resin (X) forming the retardation region 75 of the retardation layer 71, the cell region 55 of the first reinforcing member 50, the non-polarizing region 12, the non-polarization region 76, and the non-cell region 56. It is preferably used because it provides excellent adhesion to the cured product. Hereinafter, alicyclic epoxy compounds that are preferably used will be specifically exemplified, but the present invention is not limited to these compounds.

[A] Epoxycyclohexylmethyl epoxycyclohexanecarboxylates represented by the following formula (IV):

[In formula (IV), R ⁸ and R ⁹ represent hydrogen atoms or linear alkyl groups having 1 to 5 carbon atoms independently of each other. ]

[B] Epoxycyclohexanecarboxylates of alkanediol represented by the following formula (V):

[In formula (V), R ¹⁰ and R ¹¹ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other, and n represents an integer of 2 to 20. ]

[C] Epoxycyclohexylmethyl esters of dicarboxylic acids represented by the following formula (VI):

[In formula (VI), R ¹² and R ¹³ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other, and p represents an integer of 2 to 20. ]

[D] Epoxycyclohexylmethyl ethers of polyethylene glycol represented by the following formula (VII):

[In formula (VII), R ¹⁴ and R ¹⁵ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other, and q represents an integer of 2 to 10. ]

[E] Epoxycyclohexylmethyl ethers of alkanediol represented by the following formula (VIII):

[In formula (VIII), R ¹⁶ and R ¹⁷ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other, and r represents an integer of 2 to 20. ]

[F] The diepoxy trispyro compound represented by the following formula (IX):

[In formula (IX), R ¹⁸ and R ¹⁹ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other. ]

[G] Diepoxy monospiro compound represented by the following formula (X):

[In formula (X), R ²⁰ and R ²¹ represent hydrogen atoms or linear alkyl groups having 1 to 5 carbon atoms independently of each other. ]

[H] Vinyl cyclohexene epoxides represented by the following formula (XI):

[In formula (XI), R ²² represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[I] Epoxy cyclopentyl ethers represented by the following formula (XII):

[In formula (XII), R ²³ and R ²⁴ represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms independently of each other. ]

[J] Diepoxytricyclodecanes represented by the following formula (XIII):

[In formula (XIII), R ²⁵ represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms.
]

Examples of the aliphatic epoxy compound include an aliphatic polyhydric alcohol or a polyglycidyl ether as an adduct thereof. More specifically, 1,4-butanediol diglycidyl ether; 1,6-hexanediol diglycidyl ether; glycerin triglycidyl ether; trimethylrol propane triglycidyl ether; polyethylene glycol diglycidyl ether; propylene Diglycidyl ether of glycol; Polyglycidyl of a polyether polyol obtained by adding one or more alkylene oxides (ethylene oxide or propylene oxide) to an aliphatic polyhydric alcohol such as ethylene glycol, propylene glycol or glycerin. Examples include ether.

The hydrogenated epoxy compound is obtained by reacting epichlorohydrin with an alicyclic polyol obtained by hydrogenating the aromatic ring of an aromatic polyol. Examples of the aromatic polyol include bisphenol-type compounds such as bisphenol A, bisphenol F, and bisphenol S; novolak-type resins such as phenol novolac resin, cresol novolac resin, and hydroxybenzaldehyde phenol novolac resin; tetrahydroxydiphenylmethane, tetrahydroxybenzophenone, polyvinylphenol, and the like. Polyfunctional compounds of. Among the hydrogenated epoxy compounds, the diglycidyl ether of hydrogenated bisphenol A can be mentioned.

The curable resin (X) may contain a (meth) acrylic compound or the like together with an active energy ray-curable compound such as an epoxy compound. By using the (meth) acrylic compound in combination, the polarizing region 11 of the polarizer 10, the retardation region 75 of the retardation layer 71, and the cell region 55 of the first reinforcing material 50, the non-polarizing region 12, and the non-phase difference are used. The effect of increasing the adhesion between the cured product of the curable resin (X) forming the region 76 and the non-cell region 56, the hardness and mechanical strength of the cured product of the curable resin (X) can be expected, and further. Makes it easier to adjust the viscosity, curing rate, and the like of the curable resin (X). "(Meta) acrylic" means at least one selected from the group consisting of acrylic and methacrylic.

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 photocationic polymerization agents and radical polymerization initiators. The photocationic polymerization initiator generates a cationic species or Lewis acid by irradiation with active energy rays such as visible light, ultraviolet rays, X-rays, and electron beams, 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. The polymerization initiator is preferably one that generates a cationic species or a Lewis acid by irradiation with ultraviolet rays.

The curable resin composition further comprises a photosensitizer, a polymerization accelerator, an ion trapping agent, an antioxidant, a chain transfer agent, a tackifier, a thermoplastic resin, a filler, a flow conditioner, a plasticizer, and a defoamer. It can contain additives such as agents, antistatic agents, and leveling agents.

(Filler)
The filler that may be provided in the first reinforcing material 50 and the second reinforcing material 60 has translucency, and has an internal space of the first cell 51 of the first reinforcing material 50 and a second cell 61 of the second reinforcing material 60. It is not particularly limited as long as it can fill the internal space of. The filler is preferably a material different from the material constituting the cell partition wall 53 of the first reinforcing member 50 and the cell partition wall 63 of the second reinforcing member 60, and preferably contains a resin material. Examples of the resin material include one or more selected from the group consisting of curable resins such as thermoplastic resins, thermosetting resins and active energy ray-curable resins, and are adhesives or adhesives. May be good.

Examples of the thermoplastic resin include polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.) and cyclic polyolefin resins (norbornene resins, etc.); cellulose ester resins such as triacetyl cellulose and diacetyl cellulose; polyethylene terephthalates, Polyester resins such as polyethylene naphthalate and polybutylene terephthalate; polycarbonate resins; (meth) acrylic resins; polystyrene resins; polyether resins; polyurethane resins; polyamide resins; polyimide resins; fluororesins, etc. Can be mentioned.

Examples of the curable resin include the above-mentioned curable resin (X).

The pressure-sensitive adhesive exhibits adhesiveness by sticking itself to an adherend, and is a so-called pressure-sensitive adhesive. Examples of the pressure-sensitive adhesive include those 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 containing 50% by mass or more of the total solid content of the pressure-sensitive adhesive. The pressure-sensitive adhesive may be an active energy ray-curable type or a thermosetting type, and the degree of cross-linking and adhesive strength may be adjusted by irradiation with active energy rays or heating.

The adhesive contains a curable resin component and is an adhesive other than a pressure-sensitive adhesive (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, an aqueous adhesive widely used in the technical field of polarizing plates can also be used.
Examples of the resin component contained in the water-based adhesive include polyvinyl alcohol-based resin and urethane-based 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 above-mentioned curable resin (X) may be used. Examples of the thermosetting adhesive include those containing an epoxy resin, a silicone resin, a phenol resin, a melamine resin, or the like as a main component.

(Manufacturing method of polarizer complex (1))
5 to 7 are schematic cross-sectional views schematically showing an example of a method for manufacturing the polarizer complex 40 (FIG. 1 (a)). 5 to 7 show a case where the polarizer complex 40 shown in FIG. 1 (a) is obtained, but the polarizer complex 40 shown in FIGS. 2 (a) and 2 (b) will also be described below. It can be manufactured by the method. The polarizer complex 40 is, for example, a raw material polarizer 20 (FIG. 5 (a)) having the same luminous efficiency correction degree of polarization (Py) as a whole and not having a non-polarized region 12, as a raw material retardation layer. A structure 58 for forming a reinforcing material (hereinafter, "structure 58") consisting of only a polymerization cured layer 85 (FIG. 5B) and a cell region 55, which is a retardation region as a whole, and does not have a non-cell region 56. It can be manufactured by using.).

Since the raw material polarizer 20 is formed only by the polarization region 11 of the above-mentioned polarizer 10, the thickness of the raw material polarizer 20 is preferably 15 μm or less, which is the same thickness as the polarizing region 11 of the polarizer 10. Since the polymerization cured layer 85 is the retardation region 75 of the retardation layer 71 described above, the thickness of the polymerization curing layer 85 is preferably the same as the retardation region 75 of the retardation layer 71. Since the structure 58 is the cell region 55 of the first reinforcing member 50 described above, it is preferable that the structure 58 has the same thickness as the cell region 55 of the first reinforcing member 50.

The polarizer complex 40 can be produced, for example, in the following process. First, a first support layer 25 is provided on one surface of the raw material polarizer 20 and on one surface of the raw material polarizing element 20 so as to be detachable from the raw material polarizer 20 (FIG. 5A). The polymerizable liquid crystal compound is polymerized and cured on the base material layer 84 to prepare a polymerization cured layer 80 with a base material layer on which the polymerization curing layer 85 having a retardation region as a whole is formed (on the base material layer 84). FIG. 5 (b). On the raw material polarizer 20 on the first support layer 25, the polymerization cured layer 85 side of the polymerization curing layer 80 with a base material layer is laminated via a bonding layer (not shown) (FIG. 5 (c)), and the base material is formed. The layer 84 is peeled off (FIG. 5 (d)). The structure 58 is formed on the exposed surface (the surface on the polymerization cured layer 85 side) after the base material layer 84 is peeled off (FIG. 6A). As a result, a first laminated body 31 in which the structure 58, the polymerization cured layer 85, the raw material polarizer 20, and the first support layer 25 are laminated in this order is obtained (FIG. 6A). The structure 58 can be obtained, for example, by forming a cell partition wall 53 for partitioning the first cell 51 on the surface of the polymerization cured layer 85 using a resin material or an inorganic oxide.

The method for forming the cell partition wall 53 using a resin material is not particularly limited, and examples thereof include printing methods such as inkjet printing, screen printing, and gravure printing; photolithography methods; coating methods using nozzles, dies, and the like. Be done. In the above method, a resin composition obtained by mixing a resin material with a solvent, an additive, or the like may be used. Examples of the additive include a leveling agent, an antioxidant, a plasticizer, a tackifier, an organic or inorganic filler, a pigment, an antioxidant, an ultraviolet absorber, an antioxidant and the like. The cell partition wall 53 may be formed by subjecting the printed or coated resin composition to a treatment for solidification or curing, if necessary.

The method for forming the cell partition wall 53 using an inorganic oxide is not particularly limited, but it can be formed, for example, by depositing an inorganic oxide.

A through hole 32 penetrating in the stacking direction is formed in the first laminated body 31 by punching, cutting, cutting, laser cutting, or the like (FIG. 6 (b)). As a result, the perforated polarizing element 21 in which the through hole 22 is formed in the raw material polarizer 20, the perforated retardation layer 81 in which the through hole 72 is formed in the polymerization cured layer 85, and the through hole 52 are formed in the structure 58, respectively. The formed perforated structure 59 is obtained. The second support layer 26 is laminated on the perforated structure 59 side (the side opposite to the perforated retardation layer 81) of the first laminated body 31 in which the through hole 32 is formed (FIG. 6 (c)). The second support layer 26 is provided so as to close one side of the through hole 72 of the perforated retardation layer 81.

After that, the first support layer 25 is peeled off (FIG. 7A) into the through hole 22 of the perforated polarizer 21, the through hole 72 of the perforated retardation layer 81, and the through hole 52 of the perforated structure 59. By filling the curable resin composition containing the curable resin (X) and irradiating with active energy rays, the curable resin (X) in the through

holes

22, 72, 52 is cured, and the perforated polarizer is used. A cured product of the curable resin (X) is formed in the through hole 22 of 21, the through hole 72 of the perforated retardation layer 81, and the through hole 52 of the perforated structure 59 (FIG. 7 (b)). As a result, a cured product of the curable resin (X) is formed in the through hole 22 of the perforated polarizing element 21, the through hole 72 of the perforated retardation layer 81, and the through hole 52 of the perforated structure 59, and the second The first reinforcing member 50, the retardation layer 71, and the polarizer 10 are formed on the support layer 26 in this order (FIG. 7 (b)). In the polarizer 10 shown in FIG. 7B, a region other than the through hole 22 of the perforated polarizer 21 is a polarized region 11, and a region of the through hole 22 provided with a cured product is a non-polarized region 12. Is. In the retardation layer 71 shown in FIG. 7B, the region other than the through hole 72 of the perforated retardation layer 81 is the retardation region 75, and the region of the through hole 72 provided with the cured product is the non-phase difference region 76. It became. The first reinforcing member 50 shown in FIG. 7B was provided on one surface side of the polarizer 10, and the region other than the through hole 52 of the perforated structure 59 became the cell region 55, and a cured product was provided. The region of the through hole 52 is the non-cell region 56.

Subsequently, a second reinforcing member 60 is formed on the side of the polarizer 10 opposite to the retardation layer 71 side, and the polarizer complex 40 is formed on the second support layer 26 (FIG. 5 (c)). .. The second reinforcing member 60 may form the cell partition wall 63, for example, by the method described in the method for forming the cell partition wall 53 of the structure 58 described above. After forming the second reinforcing member 60, the second support layer 26 may be peeled off.

The method of filling the through hole 22 of the perforated polarizing element 21, the through hole 72 of the perforated retardation layer 81, and the through hole 52 of the perforated structure 59 with the curable resin composition is not particularly limited. For example, the curable resin composition may be injected into the through

holes

22, 72, 52 using a dispenser, a dispenser, or the like, and the through holes are coated with the curable resin composition on the perforated structure 59. 22, 72, 52 may be filled with the curable resin composition.

The first support layer 25 may be a support layer used in the production of the raw material polarizer 20, which will be described later, or the above-mentioned base film used for coating the curable resin composition may be used.
Alternatively, it may be a peelable support layer attached to the raw material polarizer 20 by a volatile liquid such as water, or may be a peelable adhesive sheet to the raw material polarizer 20. Examples of the method for providing the second support layer 26 include the method exemplified as the method for providing the first support layer 25.

As described above, since the thickness of the raw material polarizer 20 is 15 μm or less, the depth of the through hole 22 provided in the perforated polarizer 21 can also be 15 μm or less. As described in the polarizer complex 40, the thickness of the laminated structure portion including the polarizing region 11, the retardation region 75, and the cell region 55 in the polarizer complex 40 is preferably 30 μm or less, and thus the raw material phase difference. The total thickness of the polymerization cured layer 85 and the thickness of the structure 58, which are layers, is also preferably 15 μm or less. As a result, the total depth of the through

holes

22, 72, and 52 can be set to 30 μm or less. Therefore, the through hole 22 of the perforated polarizing element 21, the through hole 72 of the perforated retardation layer 71, and the through hole 52 of the perforated structure 59 can be filled with the curable resin composition, and the through

holes

22, 72, The curable resin (X) contained in the curable resin composition filled in 52 can be cured in a short time.

(Manufacturing method of polarizer complex (2))
8 to 11 are schematic cross-sectional views schematically showing an example of a method for manufacturing the polarizer complex 41 (FIG. 4). 8 to 11 show a case where the polarizer complex 41 shown in FIG. 4 is obtained. The polarizer complex 41 can be produced by using the raw material polarizer 20, the polymerization cured layer 85, and the structure 58 used in the production of the polarizer complex 40.

The polarizer complex 41 can be produced, for example, in the following process. First, a first support layer 25 is provided on one surface of the raw material polarizing element 20 so as to be detachable from the raw material polarizing element 20 on one surface of the raw material polarizing element 20, and then the other surface of the raw material polarizing element 20 is provided. The structure 58 is formed in the structure 58 to prepare the second laminated body 33 (FIG. 8 (a)). The structure 58 can be formed by the method described above. The polymerizable liquid crystal compound is polymerized and cured on the base material layer 84 to prepare a polymerization cured layer 80 with a base material layer on which the polymerization curing layer 85 having a retardation region as a whole is formed (on the base material layer 84). FIG. 8 (b).

The polymerized cured layer 85 side of the polymerized cured layer 80 with a base material layer is laminated on the structure 58 side of the prepared second laminated body 33 via a bonding layer (not shown) (FIG. 8 (c)). At this time, it is preferable that the bonding layer is provided so as to enter the internal space of the first cell 51 of the structure 58 and the gap between the plurality of first cells 51. As a result, a third laminated body 34 in which the base material layer 84, the polymerization cured layer 85, the structure 58, the raw material polarizer 20, and the first support layer 25 are laminated in this order is obtained (FIG. 8 (c)). A through hole 35 penetrating in the stacking direction is formed in the third laminated body 34 by punching, cutting, cutting, laser cutting, or the like (FIG. 8 (d)), and the base material layer 84 is peeled off (FIG. 8 (FIG. 8). e)). As a result, the perforated polarizing element 21 in which the through hole 22 is formed in the raw material polarizer 20, the perforated structure 59 in which the through hole 52 is formed in the structure 58, and the through hole 72 are formed in the polymerization cured layer 85. A perforated retardation layer 81 is obtained.

Subsequently, the third support layer 27 is laminated on the exposed side (perforated retardation layer 81 side) by peeling the base material layer 84 (FIG. 9A), and the first support layer 25 is peeled off (FIG. 9). 9 (b)). The third support layer 76 is provided so as to close one side of the through hole 72 of the perforated retardation layer 81. After that, the through hole 22 of the perforated polarizer 21, the through hole 52 of the perforated structure 59, and the through hole 72 of the perforated retardation layer 81 are filled with a curable resin composition containing a curable resin (X). By irradiating the active energy rays, the curable resin (X) in the through

holes

22, 52, 72 is cured, and the through holes 22 of the perforated polarizer 21 and the through holes 52 of the perforated structure 59, A cured product of the curable resin (X) is formed in the through holes 72 of the perforated retardation layer 81 (FIG. 9 (c)). As a result, the retardation layer 71, the first reinforcing member 50, and the polarizer 10 are formed on the third support layer 27 in this order (FIG. 9 (c)). In the retardation layer 71 shown in FIG. 9C, the region other than the through hole 72 of the perforated retardation layer 81 is the retardation region 75, and the region of the through hole 72 provided with the cured product is the non-phase difference region 76. It became. The first reinforcing member 50 shown in FIG. 9C was provided on one surface side of the polarizer 10, and the region other than the through hole 52 of the perforated structure 59 became the cell region 55, and a cured product was provided. The region of the through hole 52 is the non-cell region 56. In the polarizer 10 shown in FIG. 9 (c), the region other than the through hole 22 of the perforated polarizer 21 is the polarized region 11, and the region of the through hole 22 provided with the cured product is the non-polarized region 12. Is.

Subsequently, a second reinforcing member 60 is formed on the side of the polarizer 10 opposite to the first reinforcing member 50 side, and the polarizer complex 40 is formed on the third support layer 27 (FIG. 9 (d)). ). The second reinforcing member 60 may form the cell partition wall 63, for example, by the method described in the method for forming the cell partition wall 53 of the structure 58 described above. After forming the second reinforcing member 60, the third support layer 27 may be peeled off.

A method of filling the through hole 22 of the perforated polarizer 21, the through hole 52 of the perforated structure 59, and the through hole 72 of the perforated retardation layer 81 with the curable resin composition is as follows. Examples thereof include the filling method described in the manufacturing method. The through holes 22, 52, and 72 may be filled with the curable resin composition while the curable resin composition is coated on the surface of the perforated polarizing element 21.
Examples of the method for providing the third support layer 27 include the method exemplified as the method for providing the first support layer 25.

(Raw material polarizer)
It is preferable that the raw material polarizer 20 is not significantly deteriorated by the active energy rays irradiated to cure the curable resin (X) in the curable resin composition filled in the through hole 22. Such a raw material polarizer 20 is, for example, a film in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol-based resin film, or a film in which the dichroic dye is oriented in a cured layer of a polymerizable liquid crystal compound. , These manufacturing methods are as described in the above-mentioned polarization region 11.

(Raw material retardation layer)
The raw material retardation layer is composed of a retardation region having a retardation characteristic as a whole. The raw material retardation layer can have, for example, the retardation characteristics of the retardation region 75 described above. The raw material retardation layer can have a retardation characteristic that functions as, for example, a 1/4 wave plate, a 1/2 wave plate, a 1/4 wave plate having a reverse wavelength dispersion, or a positive C plate.

The raw material retardation layer is, for example, a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, a polymerized cured layer of a polymerizable liquid crystal compound, or the like.

As the thermoplastic resin constituting the stretched film, a thermoplastic resin having translucency (preferably optically transparent) is preferable. Specifically, polyolefin resins such as chain polyolefin resins (polyethylene resins, polypropylene resins, etc.), cyclic polyolefin resins (norbornen resins, etc.); triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, etc. Cellulose ester-based resins such as cellulose acetate butyrate; polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polytrimethylene terephthalate, polytrimethylene naphthalate, polycyclohexanedimethylterephthalate, polycyclohexanedimethylnaphthalate, etc. Polyester-based resin; Polycarbonate-based resin; (meth) acrylic-based resin; Polystyrene-based resin; or a mixture or copolymer thereof.

The polymerizable liquid crystal compound constituting the polymerization cured layer is a compound having a polymerizable reactive group and exhibiting liquid crystallinity. Examples of the polymerizable reactive group include the polymerizable reactive group exemplified by the raw material polarizer. The type of the polymerizable liquid crystal compound is not particularly limited, and a rod-shaped liquid crystal compound, a disk-shaped liquid crystal compound, and a mixture thereof can be used. The liquid crystal property of the polymerizable liquid crystal compound may be a thermotropic liquid crystal or a lyotropic liquid crystal, and the phase-ordered structure may be a nematic liquid crystal or a smectic liquid crystal.

The raw material retardation layer is a method in which, for example, a composition for forming a retardation layer containing a polymerizable liquid crystal compound is applied onto an alignment layer formed on a base film, and the polymerizable liquid crystal compound is polymerized and cured. , [Vi] A composition for forming a retardation layer is applied onto the base material layer to form a coating film, and the coating film can be formed by stretching the coating film together with the base material layer. Examples of the base material layer include the base material film used in the above-mentioned [ii] described in the raw material polarizer.

Examples of the stretched film and the polymerization cured layer constituting the raw material retardation layer include the retardation layer described in International Publication No. 2018/003416.

(Structure for forming reinforcing material (structure))
The structure 58 is a structure consisting of only the cell region 55 and not having the non-cell region 56. As described above, the structure 58 can be obtained by forming the cell partition wall 53 that partitions the first cell 51 by using a resin material or an inorganic oxide. Examples of the material that can be used as the resin material and the inorganic oxide, and the method for forming the cell partition wall 53 using these are the materials and methods exemplified above.

<Optical laminate>
10 and 11 are schematic cross-sectional views schematically showing an example of the optical laminate of the present embodiment. The optical laminate has a protective layer on one side or both sides of the

polarizing element complexes

40 and 41 shown in FIGS. 1 and 4.

(Optical laminate (1))
FIG. 10 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. 10 has

protective layers

17 and 18 on both side surfaces of the polarizing element complex 40 shown in FIG. 1 (a). The optical laminate 45 may have a protective layer 17 (or 18) only on one side of the polarizer complex 40. The polarizer complex 40 included in the optical laminate 45 may be the polarizer complex 40 shown in FIGS. 2 (a) or 2 (b). The protective layers 17 and 18 can be provided on the polarizer complex 40 via a bonding 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 polarizer complex 40 via a bonding layer. The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizer complex 40 without interposing a bonding layer.
In this case, for example, a composition containing a resin material constituting the

protective layers

17 and 18 is applied onto the polarizer complex 40, and the coated layers are solidified or cured to form the

protective layers

17 and 18. be able to.

When the optical laminate 45 is provided with

protective layers

17 and 18 on the first reinforcing material 50 side and the second reinforcing material 60 side of the polarizer composite 40 via a bonding layer, the first reinforcing material is provided. Fill the internal space of the first cell 51 of 50 and the gap between the plurality of first cells 51, the internal space of the second cell 61 of the second reinforcing member 60, and the gap between the plurality of second cells 61. It is preferable to provide the bonding layer to form the

protective layers

17 and 18. When the optical laminate 45 is provided with the

protective layers

17 and 18 so as to be in direct contact with the first reinforcing material 50 side and the second reinforcing material 60 side of the polarizer composite 40, the first reinforcing material 50 Protected so as to fill the internal space of the first cell 51 and the gap between the plurality of first cells 51, the internal space of the second cell 61 of the second reinforcing material 60 and the gap between the plurality of second cells 61, and the like. It is preferable to provide the composition containing the resin material constituting the

layers

17 and 18 to form the

protective layers

17 and 18.

(Optical laminate (2))
FIG. 11 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present embodiment. The optical laminate 46 shown in FIG. 11 has

protective layers

17 and 18 on both side surfaces of the polarizer complex 41 shown in FIG. The optical laminate 46 may have a protective layer 17 (or 18) only on one side of the polarizer complex 41. The protective layers 17 and 18 can be provided on the polarizer complex 41 via a bonding 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 polarizer complex 41 via a bonding layer. The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizer complex 41 without interposing a bonding layer. In this case, for example, a composition containing a resin material constituting the

protective layers

17 and 18 is applied onto the polarizer complex 41, and the coated layers are solidified or cured to form the

protective layers

17 and 18. be able to.

When the optical laminate 45 is provided with the protective layer 18 on the second reinforcing material 60 side of the polarizer composite 41 via the bonding layer, the internal space of the second cell 61 of the second reinforcing material 60 is provided. It is preferable to provide a bonding layer so as to fill the gaps between the plurality of second cells 61 and to form the protective layer 18. When the optical laminate 45 is provided with the protective layer 18 so as to be in direct contact with the second reinforcing material 60 side of the polarizer composite 41, the internal space and the plurality of the second cell 61 of the second reinforcing material 60 are provided. It is preferable to form the protective layer 18 by providing a composition containing the resin material constituting the protective layer 18 so as to fill the gaps between the second cells 61 of the above.

The protective layers 17 and 18 in the optical laminates 45 and 46 are active energy ray-curable resin compositions (curable resin) provided directly on the first reinforcing material 50, the retardation layer 71, and the second reinforcing material 60, respectively. It may be the cured product layer of (X)). The curable resin (X) constituting the

protective layers

17 and 18 which are the cured product layers 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. For example, the curable resin (X) described above can be mentioned. The cured product of the curable resin (X) constituting the

protective layers

17 and 18 can be the same as the cured product contained in the non-polarized region 12 of the polarizer 10.

In order to manufacture the optical laminates 45 and 46, for example, the first reinforcing material 50, the retardation layer 71, and the second reinforcing material 60 side of the

polarizer composites

40 and 41 include a curable resin (X). The curable resin (X) contained in the curable resin composition is cured by coating the curable resin composition and irradiating it with active energy rays. As a result, the

protective layers

17 and 18, which are the cured product layers of the curable resin (X) contained in the curable resin composition, are formed on the first reinforcing material 50, the retardation layer 71, and the second reinforcing material 60, respectively. It may be formed to obtain optical laminates 45 and 46.

In the optical laminates 45 and 46, one of the

protective layers

17 and 18 may be a protective layer provided via a bonding layer, and the other may be a protective layer provided without a bonding layer. The protective layers 17 and 18 included in the optical laminates 45 and 46 may be the same as each other or may be different from each other.

When coating the curable resin composition, a base film may be provided so as to cover the surface of the coating layer formed by the coating. In this case, the base film is used as the

protective layers

17 and 18, and the cured product layer of the curable resin (X) is also used as a bonding layer for bonding the

protective layers

17 and 18 to the

polarizing element complexes

40 and 41. Good. The base film may be peeled off after the curable resin (X) is cured.

(Protective layer)
The protective layers 17 and 18 are preferably resin layers that can transmit light, and may be a resin film or a coating layer formed by applying a composition containing a resin material. The resin used for the resin layer is preferably a thermoplastic resin having excellent transparency, mechanical strength, thermal stability, moisture blocking property, isotropic property, stretchability and the like. Examples of the thermoplastic resin include the thermoplastic resin constituting the base film that may be used in the production of the raw material polarizer 20 described above. When the optical laminates 45 and 46 have the

protective layers

17 and 18 on both sides, the resin compositions of the

protective layers

17 and 18 may be the same or different from each other.

From the viewpoint of thinning, the thicknesses of the

protective layers

17 and 18 are usually 200 μm or less, preferably 150 μm or less, more preferably 100 μm or less, 80 μm or less, and 60 μm or less. You may. The thickness of the

protective layers

17 and 18 is usually 5 μm or more, may be 10 μm or more, or may be 20 μm or more. The protective layers 17 and 18 may or may not have a phase difference. When the optical laminates 45 and 46 have the

protective layers

17 and 18 on both sides, the thicknesses of the

protective layers

17 and 18 may be the same or different from each other.

(Lated layer)
The bonding layer is an adhesive layer or an adhesive layer. Examples of the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer and the adhesive for forming the adhesive layer include the pressure-sensitive adhesive and the adhesive used for forming the above-mentioned filler.

<Laminate with laminated layer for optical display element>
The

polarizing element composites

40, 41 shown in FIGS. 1 and 4, and the optical laminates 45, 46 shown in FIGS. 10 and 11 are further optical display elements (liquid crystal) of a display device such as a liquid crystal display device or an organic EL display device. It may have a bonding layer for an optical display element for bonding to a panel (panel, organic EL element).

In the

polarizer composites

40, 41 and the optical laminates 45, 46, when the bonding layer for the optical display element is provided on the surface of the first reinforcing material 50 or the surface of the second reinforcing material 60, the first reinforcing material 50 and As the filler provided in the second reinforcing material 60, a material constituting the bonding layer for the optical display element is used, and the internal space of the first cell 51 of the first reinforcing material 50 and the second cell 61 of the second reinforcing material 60 are used. The filling material may be filled in the internal space of the optical display element and the bonding layer for the optical display element may be formed at the same time.

10 Polarizer, 11 Polarized Region, 11 m 1st Plane, 11n 2nd Plane, 12 Non-Polarized Region, 17, 18 Protective Layer, 20 Raw Material Polarizer, 21 Perforated Polarizer, 22 Through Hole, 25 1st Support Layer, 26 2nd support layer, 27 3rd support layer, 31 1st laminate, 32 through hole, 33 2nd laminate, 34 through hole, 40,41 polarizer composite, 45,46 optical laminate, 50 1st Reinforcing material, 51 1st cell, 52 through hole, 53 cell bulkhead, 60 2nd reinforcing material, 61 2nd cell, 63 cell bulkhead, 70, 71 retardation layer, 72 through hole, 75 retardation region, 76 non-positioning Phase difference region, 80 polymerization hardened layer with base material layer, 81 perforated retardation layer, 84 base material layer, 85 polymerization hardened layer.

Claims

A polarizer complex having a polarizer, a retardation layer and a first reinforcing material provided on one surface side of the polarizer, and a second reinforcing material provided on the other surface side of the polarizer. And
The polarizer has a polarized region having a thickness of 15 μm or less and a non-polarized region surrounded by the polarized region in a plan view.
The retardation layer has a retardation characteristic and exists in a region corresponding to the polarization region, and a non-phase difference having no retardation characteristic and exists in a region corresponding to the non-polarized region. Has an area and
The first reinforcing material is
It has a plurality of first cells having an open end face, and each open end face is arranged so as to face the surface of the polarizer.
It has a cell region in which the first cell exists and exists in a region corresponding to the polarized light region, and a non-cell region in which the first cell does not exist and exists in a region corresponding to the non-polarized region. ,
The second reinforcing material is
It has a plurality of second cells having an open end face, and each open end face is arranged so as to face the surface of the polarizer.
The second cell exists in at least the region corresponding to the non-polarized region,
The non-polarized region, the non-phase difference region, and the non-cell region contain a cured product of an active energy ray-curable resin.
The cured product contained in the non-polarized region is provided in a through hole surrounded by the polarized region in a plan view.
The cured product contained in the non-phase difference region is a polarizer complex provided in a through hole surrounded by the retardation region in a plan view.
The polarizer composite according to claim 1, wherein the retardation layer and the first reinforcing material are provided in this order from the polarizer side.
The polarizer composite according to claim 1, wherein the first reinforcing material and the retardation layer are provided in this order from the polarizer side.
The thickness of the cured product is the same as the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex, according to any one of claims 1 to 3. Polarizer complex.
The thickness of the cured product is smaller than the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex, according to any one of claims 1 to 3. Polarizer complex.
The thickness of the cured product is larger than the thickness of the laminated structure portion including the polarization region, the retardation region, and the cell region in the polarizer complex, according to any one of claims 1 to 3. Polarizer complex.
The polarizer complex according to any one of claims 1 to 6, wherein the retardation region is a polymerization cured layer of a polymerizable liquid crystal compound.
The polarizer complex according to any one of claims 1 to 7, wherein the non-polarized region has translucency.
The polarizer complex according to any one of claims 1 to 8, wherein the diameter of the non-polarized region in a plan view is 0.5 mm or more and 20 mm or less.
The polarizer complex according to any one of claims 1 to 9, wherein the active energy ray-curable resin contains an epoxy compound.
The polarizer complex according to claim 10, wherein the epoxy compound contains an alicyclic epoxy compound.
The polarizer complex according to any one of claims 1 to 11, wherein the shapes of the openings of the first cell and the second cell are independently polygonal, circular, or elliptical. ..
The polarizer complex according to any one of claims 1 to 12, further comprising a translucent filler in the internal space of the first cell.
The polarizer complex according to any one of claims 1 to 13, further comprising a translucent filler in the internal space of the second cell.
An optical laminate having a protective layer on one side or both sides of the polarizer complex according to any one of claims 1 to 14.