WO2021079613A1

WO2021079613A1 - Polarizer complex and optical laminate

Info

Publication number: WO2021079613A1
Application number: PCT/JP2020/032326
Authority: WO
Inventors: 寿和松本
Original assignee: 住友化学株式会社
Priority date: 2019-10-25
Filing date: 2020-08-27
Publication date: 2021-04-29
Also published as: JP2021067867A; KR20220084307A; CN114599514A; TW202120309A; JP7516027B2

Abstract

A polarizer complex that has a polarizer and a reinforcing material provided on at least one surface side of the polarizer. The polarizer has: a polarized region having a thickness of no more than 15 µm; and a non-polarized region surrounded by the polarized region in the planar view. The reinforcing material has a plurality of cells having an open end surface and each open end surface is arranged so as to face the surface of the polarizer. The reinforcing material has: a cell region that has cells present therein and is present in a region corresponding to the polarized region; and a non-cell region that does not have cells present therein and is present in a region corresponding to the non-polarized region. The non-polarized region and the non-cell region include a cured product of an active energy ray curable resin and, in the planar view, the cured product included in the non-polarized region is provided in a through-hole surrounded by the polarized region.

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] A polarizer complex having a polarizer and a reinforcing material provided on at least one surface side of the polarizer.
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 reinforcing material is
A plurality of cells having an open end face are provided, and each open end face is arranged so as to face the surface of the polarizer.
It has a cell region in which the cell exists and exists in a region corresponding to the polarized light region, and a non-cell region in which the cell does not exist and exists in a region corresponding to the non-polarized region.
The non-polarized region and the non-cell region contain a cured product of an active energy ray-curable resin composition.
The cured product contained in the non-polarized region is a polarizer complex provided in a through hole surrounded by the polarized region in a plan view.
[2] The polarizer composite according to [1], wherein the reinforcing material is provided on both sides of the polarizer.
[3] The polarizer complex according to [1] or [2], wherein the thickness of the cured product is the same as the total thickness of the polarization region and the cell region.
[4] The polarizer complex according to [1] or [2], wherein the thickness of the cured product is smaller than the total thickness of the polarization region and the cell region.
[5] The polarizer complex according to [1] or [2], wherein the thickness of the cured product is larger than the total thickness of the polarization region and the cell region.
[6] The polarizer complex according to any one of [1] to [5], wherein the non-polarized region has translucency.
[7] The polarizer complex according to any one of [1] to [6], wherein the diameter of the non-polarized region in a plan view is 0.5 mm or more and 20 mm or less.
[8] The polarizer complex according to any one of [1] to [7], wherein the active energy ray-curable resin contains an epoxy compound.
[9] The polarizer complex according to [8], wherein the epoxy compound contains an alicyclic epoxy compound.
[10] The polarizer complex according to any one of [1] to [9], wherein the shape of the opening of the cell is a polygonal shape, a circular shape, or an elliptical shape.
[11] The polarizer complex according to any one of [1] to [10], wherein a translucent filler is provided in the internal space of the cell.
[12] An optical laminate having a protective layer on one side or both sides of the polarizer complex according to any one of [1] to [11].
[13] The protective layer provided on one side of the polarizer composite is the same active energy ray-curable resin as the active energy ray-curable resin constituting the cured product contained in the non-polarized region and the non-cell region. The optical laminate according to [12], which is a cured product layer of a sex resin.

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

(A) to (c) are schematic cross-sectional views schematically showing an example of the polarizer complex of the present invention. (A) is a schematic plan view of the polarizing element complexes shown in FIGS. 1 (a) to 1 (c) when viewed from the A direction, and FIG. 1 (b) is a schematic plan view of the polarizing element complexes shown in FIGS. It is a schematic plan view which looked at the body from the B direction. (A) and (b) are diagrams schematically showing an example of a cross section around a non-polarized region and a non-cell region of a polarizer complex, and are views of a cured product provided in the non-polarized region and the non-cell region. It is explanatory drawing for demonstrating the method of determining a thickness. It is schematic cross-sectional view which shows another example of the polarizer complex of this invention schematically. (A) to (e) are schematic cross-sectional views schematically showing an example of the method for producing a polarizer complex of the present invention. (A) to (d) 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))
1 (a) to 1 (c) are schematic cross-sectional views schematically showing an example of a polarizer complex of the present embodiment. FIG. 2A is a schematic plan view of the polarizer complex shown in FIGS. 1A to 1C as viewed from the A direction (polarizer side), and FIG. 2B is FIG. 1A. It is a schematic plan view which saw the polarizer composite shown in (c) from the B direction (reinforcing material side). The polarizer complex 40 shown in FIGS. 1 (a) to 1 (c) has a polarizer 10 and a reinforcing member 50 provided on one side of the polarizer 10.

As shown in FIG. 2A, the polarizing element 10 included in the polarizing element complex 40 has a polarized light region 11 and a non-polarized light region 12 surrounded by the polarized light region 11 in a plan view. The thickness of the polarized light region 11 is 15 μm or less.

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.

As shown in FIG. 2B, the reinforcing material 50 included in the polarizer complex 40 has a plurality of cells 51 having open end faces, and each open end face faces the surface of the polarizer 10. It is arranged in. The reinforcing material 50 has a cell region 55 in which the cell 51 is present and a non-cell region 56 in which the cell 51 is not present. The cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell partition wall 53 for partitioning the cell 51, and has an open end surface in which both ends in the axial direction of the columnar structure are open. The non-cell region 56 in which the 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 cell 51 does not exist.

In the 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 be present in the region corresponding to the polarization region 12.

The non-polarizing region 12 of the polarizer 10 and the non-cell region 56 of the reinforcing material 50 include a cured product of an active energy ray-curable resin (hereinafter, may be referred to as “curable resin (X)”). As shown in FIGS. 1 (a) to 1 (c), the non-polarized region 12 is a region in which a cured product of the curable resin (X) is provided in a through hole 22 surrounded by the polarized region 11 in a plan view. can do. The non-cell region 56 is provided so as to cut out all or a part of the plurality of cells 51, and the curable resin (X) is cured in the through holes 52 provided in the regions corresponding to the through holes 22 described above. It can be an area provided with an object. The through hole 22 of the polarizer 10 and the through hole 52 of the reinforcing member 50 can have the same shape in a plan view. The through hole 22 and the through hole 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) can be provided over the through

holes

22 and 52 that communicate with each other. it can.

As shown in FIG. 2A, 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 the polarizer complex 40, since the polarizer 10 has a non-polarizing region 12, cracks are likely to occur around the non-polarizing region 12 due to shrinkage of the polarizer 10 due to a temperature change received when applied to a display device or the like. it is conceivable that. 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 reinforcing material 50 is provided on one side of the polarizer 10 as described above, cracks occur when a temperature change or impact is applied, and fine cracks progress to large cracks. It is thought that this can be suppressed.

In the polarizer complex 40, the non-polarizing region 12 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 through hole 52 of the reinforcing material 50 are solid. can do. Since the thickness of the polarizer 10 of the polarizer complex 40 is as thin as 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, since the non-polarizing region 12 can be made solid by providing the cured product of the curable resin (X) in the through hole 22 like the polarizing element 10 of the polarizing element complex 40. It is possible to suppress the occurrence of the above-mentioned problems.

The thickness of the cured product of the curable resin (X) provided on the polarizer complex 40 may be the same as the total thickness of the polarizing region 11 and the cell region 55 (FIG. 1 (a)). It may be smaller than the total thickness (FIG. 1 (b)) or larger than the total thickness (FIG. 1 (c)). The cured product of the curable resin (X) provided in the polarizer complex 40 is provided so as to fill at least a part of the through hole 22 of the polarizer 10 and at least a part of the through hole 52 of the reinforcing material 50. It suffices if it is done. The cured product of the curable resin (X) is preferably provided so as to fill the entire through hole 22 of the polarizer 10, and fills the entire through hole 22 of the polarizer 10 and the entire through hole 52 of the reinforcing material 50. It is more preferable to be provided.

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 reinforcing member 50 side) and the open end surface (polarizer) of the cell region 55 of the reinforcing member 50. It is assumed that the second plane includes the open end face on the side opposite to the 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 surface of the cured product on the reinforcing material 50 side. The second position, which is the position where the shortest distance between the second plane 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.

A method for determining the thickness when the thickness of the cured product provided in the non-polarized region 12 and the non-cell region 56 is different from the total thickness of the polarized region 11 and the cell region 55 will be specifically described with reference to FIG. .. 3 (a) and 3 (b) are views schematically showing an example of a cross section around the non-polarized region and the non-cell region of the polarizer complex, and are the curing provided in the non-polarized region and the non-cell region. It is explanatory drawing for demonstrating the method of determining the thickness of an object.

When a cured product is provided in the non-polarized region 12 and the non-cell region 56 as shown in FIG. 3A, the non-polarized region 12 is provided along the surface side of the polarizer 10 opposite to the reinforcing material 50 side. It is assumed that the straight line indicated by the alternate long and short dash line in is 11 m on the first plane. 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-polarized region 12, 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-cell region 56 along the surface side of the reinforcing material 50 opposite to the polarizer 10 side is the second plane 11n. .. 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-cell region 56, 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-polarized region 12 and the non-cell region 56 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 (polarizer complex 40 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. Then, the thickness of the cured product provided in the non-polarized region 12 and the non-cell region 56 shown in FIG. 3A can be determined as D + dm + dn (where dm and dn are negative values).

Further, as shown in FIG. 3B, when the cured product is provided in the non-polarized region 12 and the non-cell region 56, the first plane 11m and the second plane 11n are assumed in the same manner as described above. , The thickness of the cured product provided in the non-polarized region 12 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-polarized region 12 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-cell region 56, 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-polarized region 12 and the non-cell region 56 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 polarizer complex 40) 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 and the non-cell region 56 shown in FIG. 3B can be determined as D + dm + dn (dm and dn are positive values).

The polarizer complex 40 is applied to a display device or the like with the polarizer 10 and the reinforcing material 50 provided. If the internal space of the cell 51 of the reinforcing material 50 is hollow, the visibility of the display device may decrease due to a difference in the refractive index between the cell partition wall 53 and the internal space of the cell 51. Therefore, it is preferable that a translucent filler is provided in the internal space of the cell 51 of the reinforcing material 50 in the polarizer complex 40. In the reinforcing material 50 of the polarizer complex 40, when a gap is provided between the plurality of cells 51 as described later, it is preferable that a translucent filler is also provided in the gap.

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.

The polarizer complex 40 may be a single-wafered body, or may be a long body having a length that is wound into a roll shape during storage, transportation, or the like. The planar shape and size of the polarizer complex 40 are not particularly limited.

(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 and reinforcing

members

50 and 50 provided on both side surfaces of the polarizer 10. The polarizer 10 and the reinforcing member 50 are as described above. In the polarizer complex 41, the non-polarizing region 12 of the polarizer 10 and the non-cell region 56 of the two reinforcing members 50 each contain a cured product of the curable resin (X). The through hole 22 of the polarizer 10 and the through hole 52 of the two reinforcing members 50 can have the same shape in a plan view. The through hole 22 and the two through holes 52 can be in communication 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 and 52 that communicate with each other. be able to.

Similar to the polarizing element complex 40 shown in FIG. 1, the polarizer complex 41 can also suppress a decrease in camera sensitivity and a decrease in design when applied to a display device, and has the above-mentioned problems. It is possible to suppress the decrease in occurrence.

The thickness of the cured product of the curable resin (X) provided on the polarizer complex 40 may be the same as the total thickness of the polarizing region 11 and the thickness of the cell region 55 of the two reinforcing members. It may be smaller than the total thickness and may be larger than the total thickness. The cured product of the curable resin (X) provided in the polarizer complex 41 fills at least a part of the through hole 22 of the polarizer 10 and at least a part of each of the through holes 52 of the two reinforcing members 50. It suffices if it is provided as follows. The cured product of the curable resin (X) is preferably provided so as to fill the entire through hole 22 of the polarizer 10, and the entire through hole 22 of the polarizer 10 and the through hole 52 of the two reinforcing members 50, respectively. It is more preferable that it is provided so as to fill the entire surface of the.

The thickness of the cured product of the curable resin (X) provided on the polarizing element complex 41 may be measured according to the method for measuring the thickness of the cured product provided on the polarizing element composite 40 described above. Specifically, in the above measurement method, the cell region of the reinforcing material 50 is different from the reinforcing material 50 assuming the second plane of the two reinforcing materials 50 provided on the polarizer complex 41. The thickness of the cured product of the curable resin (X) may be determined as the surface including the open end surface of 55 (the open end surface on the side opposite to the polarizer 10 side).

The two reinforcing members 50 included in the polarizer complex 41 may be the same as each other (the shape and size of the cell 51 are the same), or may be different from each other. The openings of the cells 51 of the two reinforcing members 50 provided on both sides of the polarizer 10 may be arranged so as to overlap each other in a plan view, but are preferably arranged so as to be offset from each other.

As described in the above-mentioned Polarizer Complex 40, it is preferable that a translucent filler is provided in the internal space of the cell 51 of the reinforcing material 50 in the Polarizer Complex 41. In the reinforcing material 50 of the polarizer complex 41, when a gap is provided between the plurality of cells 51 as described later, it is preferable that a translucent filler is also provided in the gap.

The polarizer complex 41 may be a single-wafered body, or may be a long body having a length that is wound into a roll shape during storage, transportation, or the like. The planar shape and size of the polarizer complex 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. The luminosity factor correction polarization degree (Py) can be measured using, for example, an ultraviolet-visible spectrophotometer (manufactured by JASCO Corporation, product name: V7100), and the parallel transmittance Tp and the orthogonality factor with luminosity factor correction. It is calculated by the following formula based on the transmittance Tc.
Py [%] = {(Tp-Tc) / (Tp + Tc)} ^1/2 x 100

The thickness of the polarized light region 11 is 15 μm or less, 13 μm or less, 10 μm or less, 8 μm or less, 5 μm or less, and usually 1 μm or more. When the thickness of the polarizing region 11 exceeds the above range, the workability for providing the active energy ray-curable resin composition containing the curable resin (X) described later in the non-polarizing region 12 tends to decrease. Further, when the polarization region 11 is less than the above range, it becomes difficult to obtain desired optical characteristics. The thickness of the polarizing region 11 can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Corporation).

(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, optical 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)
The cell region 55 is an region in which the cell 51 of the reinforcing member 50 exists. As shown in FIG. 2B, the cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell partition wall 53 for partitioning the cell 51, and an open end surface in which both ends in the axial direction of the columnar structure are open. It is the one that has become. The cell 51 has a first opening end face arranged on a side in which the distance between the

polarizer complexes

40 and 41 and the polarizer 10 is relatively short, and a second opening arranged on a relatively distant side as opening end faces. Has an end face. 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 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 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 cells 51 included in the cell region 55 are arranged so that the openings of the cells 51 are adjacent to each other in the plan view of the opening end surface. The plurality of cells 51 are arranged so that the cells 51 are arranged without gaps in the plan view of the opening end face, for example, when the shape of the opening of the cell 51 shown in FIG. 2B is hexagonal or the like. You may be doing it. Alternatively, the plurality of cells 51 are in contact with a part of the cell partition wall 53 of the plurality of cells 51 as in the case where the shape of the opening of the cell 51 is circular or the like in the plan view of the opening end face, and the plurality of cells are present. It may be arranged so as to be arranged with a gap between 51.

As shown in FIG. 2B, for example, the cell region 55 of the reinforcing member 50 has a hexagonal opening shape in both the first opening end face and the second opening end face, and the

polarizer composites

40 and 41 have a hexagonal shape. It is preferable to have a honeycomb structure in which a plurality of cells 51 are arranged so that the openings are arranged adjacent to each other without a gap in the plane direction.

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

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

The line width of the cell partition wall 53 of the reinforcing material 50 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)
The non-cell region 56 is a region in which the cell 51 of the reinforcing material 50 does not exist, and as described above, a hollow columnar (cylindrical) space surrounded by the cell partition wall 53 and the cell partition wall 53 constituting the cell 51 exists. It is an area that is not. The non-cell region 56 is provided so as to cut out all or a part of the plurality of 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.

(Active energy ray-curable resin composition (curable resin composition))
As described above, the non-polarizing region 12 and the non-cell region 56 in the

polarizer composites

40 and 41 are regions provided with a cured product of the active energy ray-curable resin (curable resin (X)), and are preferably regions. It is formed of an active energy ray-curable resin composition containing the curable resin (X) (hereinafter, may be referred to as "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. It is preferably used because it provides excellent adhesion between the cell region 55 of 11 and the reinforcing material 50 and the cured product of the curable resin (X) forming the non-polarized region 12 and the non-cell region 56. 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. A cured product of a curable resin (X) that forms the polarized region 11 of the polarizer 10 and the cell region 55 of the reinforcing material 50, and the non-polarized region 12 and the non-cell region 56 by using the (meth) acrylic compound in combination. It can be expected to have the effect of increasing the adhesion between the curable resin (X), the hardness of the cured product of the curable resin (X), and the mechanical strength, and further, it is easier to adjust the viscosity and curing rate of the curable resin (X). You will be able to do it. "(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 reinforcing material 50 is not particularly limited as long as it has translucency and can fill the internal space of the cell 51 of the reinforcing material 50. The filler is preferably a material different from the material constituting the cell partition wall 53 of the reinforcing material 50, 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))
FIG. 5 is a schematic cross-sectional view schematically showing an example of a method for manufacturing the polarizer complex 40 (FIG. 1 (a)). Although FIG. 5 shows a case where the polarizer 10 shown in FIG. 1 (a) is obtained, the polarizer 10 shown in FIGS. 1 (b) and 1 (c) can also be manufactured by the method described below. .. The polarizer complex 40 is, for example, a non-cell composed of only a cell region 55 on one side of a raw material polarizer 20 having the same luminous efficiency correction degree of polarization (Py) as a whole and not having a non-polarizing region 12. It can be manufactured by forming a reinforcing material forming structure 58 (hereinafter, may be referred to as “structure 58”) having no region 56. 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 structure 58 is the cell region 55 of the reinforcing material 50 described above, it is preferable that the structure 58 has the same thickness as the cell region 55 of the reinforcing material 50.

The polarizer complex 40 can be produced, for example, in the following process. First, as shown in FIG. 5A, a first support layer 25 is provided on one surface of the raw material polarizer 20 so as to be detachable from the raw material polarizer 20, and then the other surface of the raw material polarizer 20 is provided. The structure 58 is formed in the structure 58 to prepare the first laminated body 31. The structure 58 can be obtained, for example, by forming a cell partition wall 53 for partitioning the cell 51 on the surface of the raw material polarizer 20 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 prepared first laminated body 31 by punching, cutting, cutting, laser cutting, or the like (FIG. 5 (b)). As a result, on the first support layer 25 in which the through hole is formed, the perforated polarizer 21 in which the through hole 22 is formed in the raw material polarizer 20 and the perforated hole 52 in which the through hole 52 is formed in the structure 58. The structure 59 is formed. Subsequently, the second support layer 26 is detachably provided on the perforated structure 59 side of the first laminated body 31 in which the through hole 32 is formed (FIG. 5 (c)), and then the first support layer 25 is peeled off. (Fig. 5 (d)). As a result, a second laminated body 33 in which the second support layer 26, the perforated structure 59, and the perforated polarizer 21 are laminated in this order is obtained (FIG. 5 (d)). The second support layer 26 is provided so as to close one side of the through hole 52 of the perforated structure 59.

Next, the through hole 22 of the perforated polarizer 21 of the second laminated body 33 and the through hole 52 of the perforated structure 59 are filled with a curable resin composition containing a curable resin (X), and active energy rays are applied. By irradiating, the curable resin (X) in the through

holes

22 and 52 is cured. As a result, a cured product of the curable resin (X) is formed in the through hole 22 of the perforated polarizer 21 and the through hole 52 of the perforated structure 59, and the polarizer composite laminated on the second support layer 26. 40 is obtained (FIG. 5 (e)). After forming the cured product, the second support layer 26 may be peeled off. In the obtained polarizer complex 40, 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. And, the region other than the through hole 52 of the perforated structure 59 is the cell region 55, and the region of the through hole 52 provided with the cured product is the non-cell region 56.

The method of filling the through hole 22 of the perforated polarizing element 21 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 and 52 of the second laminated body 33 using a dispenser, a dispenser, or the like, and the curable resin composition may be injected onto the surface of the perforated polarizer 21 of the second laminated body 33. The through holes 22 and 52 may be filled with the curable resin composition while coating the curable resin composition. The cured product layer of the curable resin composition coated on the surface of the perforated polarizing element 21 can be a protective layer described later. 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. The base film may be used as a protective layer described later, and in this case, the cured product layer of the curable resin (X) may be a bonding layer for bonding the protective layer described later. The base film may be peeled off after the curable resin (X) contained in the curable resin composition is cured.

The first support layer 25 may be the support layer used in the production of the raw material polarizer 20, 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 an adhesive sheet that can be peeled off from the raw material polarizer 20. The second support layer 26 may be a peelable support layer bonded to the perforated polarizing element 21 by a volatile liquid such as water, and is an adhesive sheet that can be peeled off from the perforated polarizing element 21. You may.

(Manufacturing method of polarizer complex (2))
6 and 7 are schematic cross-sectional views schematically showing an example of a method for producing the polarizer complex 41 (FIG. 4). The polarizer complex 41 is, for example, a non-cell composed of only a cell region 55 on both sides of a raw material polarizer 20 having the same luminous efficiency correction degree of polarization (Py) as a whole and not having a non-polarizing region 12. It can be manufactured by forming each of the structures (reinforcing material forming structures) 58 having no region 56. 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 structure 58 is the cell region 55 of the reinforcing material 50 described above, it is preferable that the structure 58 has the same thickness as the cell region 55 of the reinforcing material 50.

The polarizer complex 41 can be produced, for example, in the following process. First, the first laminated body 31 is prepared by the procedure described in the method for manufacturing the polarizer complex 40 (FIG. 6A). The third support layer 27 is detachably provided on the structure 58 side of the prepared first laminated body 31 (FIG. 6 (b)), and then the first support layer 25 is detached (FIG. 6 (c)). The structure 58 is formed on the exposed surface (the surface of the raw material polarizer 20) by peeling off the first support layer 25 in the same procedure as described above (FIG. 6 (d)). As a result, a third laminated body 34 in which the third support layer 27, the structure 58, the raw material polarizer 20, and the structure 58 are laminated in this order is obtained (FIG. 6 (d)).

A through hole 36 penetrating in the stacking direction is formed in the obtained third laminated body 34 by punching, cutting, cutting, laser cutting, or the like (FIG. 7A). As a result, on the third support layer 27 in which the through hole is formed, the perforated polarizer 21 in which the through hole 22 is formed in the raw material polarizer 20, and the perforated hole 52 in which the through hole 52 is formed in the structure 58. The structure 59 is formed. Subsequently, the fourth support layer 28 is detachably provided on the perforated structure 59 side of the third laminated body 34 in which the through hole 36 is formed (FIG. 7B), and then the third support layer 27 is peeled off. (Fig. 7 (c)). As a result, a fourth laminated body 35 in which the perforated structure 59, the perforated polarizing element 21, the perforated structure 59, and the fourth support layer 28 are laminated in this order is obtained (FIG. 7 (c)). The fourth support layer 28 is provided so as to close one side of the through hole 52 of the perforated structure 59.

Next, the curable resin (X) is applied to the through hole 22 of the perforated polarizer 21 of the fourth laminated body 35 and the through hole 52 of the perforated structure 59 by the method exemplified in the method for producing the polarizer composite 40. The curable resin (X) in the through

holes

22 and 52 is cured by filling the curable resin composition containing the mixture and irradiating it with active energy rays. As a result, a cured product of the curable resin (X) is formed in the through hole 22 of the perforated polarizing element 21 and the through hole 52 of the perforated structure 59, and the polarizer composite laminated on the fourth support layer 28. 41 is obtained (FIG. 7 (d)). After forming the cured product, the fourth support layer 28 may be peeled off. In the obtained polarizer complex 41, 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. And, the region other than the through hole 52 of the perforated structure 59 is the cell region 55, and the region of the through hole 52 provided with the cured product is the non-cell region 56.

Examples of the method for filling the through hole 22 of the perforated polarizer 21 and the through hole 52 of the perforated structure 59 with the curable resin (X) include the filling method described in the method for producing the polarizer complex (1). Be done. Examples of the method of providing the third support layer 27 and the fourth support layer 28 include the methods exemplified as the method of providing the first support layer 25 and the second support layer 26.

As described above, in the

polarizer complexes

40 and 41, 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. Since the height of the cell 51 of the perforated structure 59 is usually 15 μm or less, the depth of the through hole 52 provided in the perforated structure 59 can also be 15 μm or less. As a result, the curable resin composition is filled in the through hole 22 of the perforated polarizing element 21 and the through hole 52 of the perforated structure 59, and is included in the curable resin composition filled in the through

holes

22 and 52. Since the curing treatment of the curable resin (X) can be performed in a short time, deterioration of workability can be suppressed.

In the method for manufacturing the polarizer complex 40, a through hole 32 is formed in the first laminated body 31 having the structure 58, the raw material polarizer 20, and the first support layer 25 in this order. In the method for producing the polarizer complex 41, a through hole 36 is formed in the third laminated body 34 having the third support layer 27, the structure 58, the raw material polarizer 20, and the structure 58 in this order. The raw material polarizer 20 forms a region to be the non-polarized region 12 of the polarizing element 10, and its thickness is as thin as 15 μm or less. Therefore, when the raw material polarizer 20 is formed with the through hole 22, the through hole 22 is formed. There is a risk of problems such as cracks occurring in the periphery. In the method for producing the

polarizer complexes

40 and 41, the structure 58 is provided in the raw material polarizer 20, and the through hole 22 is formed in a state where the raw material polarizer 20 is reinforced by the structure 58. It is possible to obtain a polarizer 10 in which cracks are suppressed and cracks are suppressed.

(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.

(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 cell 51 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>
8 and 9 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 polarizer complex 40 shown in FIGS. 1 (a) to 1 (c) and the polarizer complex 41 shown in FIG.

(Optical laminate (1))
The optical laminate 45 shown in FIG. 8 has

protective layers

17 and 18 on both side surfaces of the polarizer 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. 1 (b) or 1 (c). 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 the protective layer 18 via the bonding layer on the reinforcing material 50 side of the polarizing element composite 40, the internal space of the cells 51 of the reinforcing material 50 and the plurality of cells 51. It is preferable to provide a bonding layer so as to fill the gaps between the layers 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 reinforcing material 50 side of the polarizing element composite 40, the internal space of the cells 51 of the reinforcing material 50 and the space between the plurality of cells 51. It is preferable to form the protective layer 18 by providing a composition containing a resin material constituting the protective layer 18 so as to fill the gaps and the like.

When the optical laminate 45 is provided with a protective layer 17 via a bonding layer on the polarizer 10 side of the polarizer complex 40 shown in FIG. 1B or FIG. 1C, the polarizing element 10 is provided. It is preferable to provide a bonding layer and provide a protective layer 17 so as to fill the thickness difference between the polarized region 11 and the non-polarized region 12. When the optical laminate 45 is provided with the protective layer 17 so as to be in direct contact with the polarizer 10 side of the polarizer complex 40 shown in FIG. 1 (b) or (c), the polarized light of the polarizer 10 is provided. It is preferable to form the protective layer 17 by providing a composition containing a resin material constituting the protective layer 17 so as to fill the thickness difference between the region 11 and the non-polarized region 12.

In the optical laminate 45, the protective layer 17 may be a cured product layer of a curable resin (X) provided directly on the polarizing element 10. The curable resin (X) constituting the protective layer 17 which is a cured product layer is not particularly limited as long as it is a resin that is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. Examples thereof include the curable resin (X) described above. The protective layer 17 is a cured product of a curable resin composition containing the same curable resin (X) as the curable resin (X) constituting the cured product contained in the non-polarized region 12 and the non-cell region 56 of the polarizer 10. It is preferably a layer.

When the protective layer 17 is a cured product layer of the same curable resin (X) as the curable resin (X) constituting the cured product of the polarizer 10 and the cured product of the reinforcing material 50, the protective layer 17 is at least the polarizer 10 It is preferable to cover the non-polarized region 12 of the above. The protective layer 17 may cover at least a part of one side of the polarizer 10, but it is preferable to cover the entire surface of one side of the polarizer 10.

In order to produce the optical laminate 45, for example, the curable resin composition is coated on the polarizer 10 side of the polarizer composite 40, and the curable resin (X) is cured by irradiating it with active energy rays. .. As a result, the protective layer 17 which is a cured product layer of the curable resin (X) may be formed on the polarizing element 10 to obtain the optical laminate 45.

Alternatively, first, by coating the surface of the perforated polarizing element 21 of the second laminated body 33 (FIG. 5 (d)) with the curable resin composition, the through holes 52 and the perforations of the perforated structure 59 are perforated. The through hole 22 of the polarizer 21 is filled with the curable resin composition, and a coating layer of the curable resin composition is also formed on the surface of the perforated polarizer 21. Then, by irradiating with active energy rays, the curable resin (X) in the through hole 52 of the perforated structure 59, in the through hole 22 of the perforated polarizing element 21, and on the surface of the perforated polarizing element 21 is cured. Alternatively, the cured product and the protective layer 17 which is a cured product layer may be formed to obtain the optical laminate 45. In this case, the cured product contained in the non-polarized region 12 and the non-cell region 56 and the cured product layer constituting the protective layer 17 can be integrated, and the protective layer 17 is the non-polarized region 12 and the non-cell region. It is preferable that the cured product layer is a curable resin composition containing the same curable resin (X) as the curable resin (X) constituting the cured product contained in 56.

(Optical laminate (2))
The optical laminate 46 shown in FIG. 9 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 may be provided on the polarizing element complex 41 via a bonding layer such as an adhesive layer or an adhesive layer, and are in direct contact with the polarizing element complex 41 without a bonding layer. It may be provided in. The method of providing the

protective layers

17 and 18 on the polarizer complex 41 may be performed in the same procedure as the method of providing the

protective layers

17 and 18 on the polarizer complex 40 in the optical laminate 45 shown in FIG. 8 described above. it can.

When the protective layer 17 (or 18) provided on one side of the

polarizer composites

40 and 41 is a layer provided so as to be in direct contact with the

polarizer composites

40 and 41, the protective layer 17 (or 18) Can be a cured product layer of the same curable resin (X) as the curable resin (X) constituting the cured product contained in the non-polarized region 12 and the non-cell region 56 of the

polarizer composites

40 and 41. .. In this case, when the

polarizer composites

40 and 41 are manufactured, the through hole 22 of the perforated polarizer 21 and the through hole 52 of the perforated structure 59 are filled with a curable resin (X) while performing perforated polarized light. The cured product layer obtained by curing the curable resin (X) coated on the surface of the child 21 or the perforated structure 59 may be the protective layer 17 (or 18). As a result, the cured product contained in the non-polarized region 12 and the non-cell region 56 and the cured product layer constituting the protective layer 17 (or 18) can be integrated, and the protective layer 17 (or 18) can be integrated. It can be a cured product layer of a curable resin composition containing the same curable resin (X) as the curable resin (X) constituting the cured product contained in the non-polarized region 12 and the non-cell region 56.

In the

optical laminates

45 and 46 shown in FIGS. 8 and 9, one of the

protective layers

17 and 18 is a protective layer provided via a bonding layer, and the other is a protective layer provided without a bonding layer. May be good. 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 may be the

protective layers

17 and 18, and the cured product layer of the curable resin (X) may be the bonding layer for bonding the

protective layers

17 and 18. 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 (a) to 1 (c) and FIGS. 4 and the

optical laminates

45, 46 shown in FIGS. 8 and 9 further display a liquid crystal display device, an organic EL display device, or the like. It may have a bonding layer for an optical display element for bonding to an optical display element (liquid crystal panel, organic EL element) of the apparatus.

In the polarizer complex 40, for an optical display element on a surface having a thickness difference between a polarized region 11 and a non-polarized region 12 as in the polarizer complex 40 shown in FIGS. 1 (b) or 1 (c). When the bonding layer is provided, it is preferable to provide the bonding layer for the optical display element so as to fill this difference in thickness.

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 reinforcing material 50, the bonding layer for the optical display element is provided as a filler to be provided on the reinforcing material 50. The filling material may be filled in the internal space of the cell 51 of the reinforcing material 50 and the bonding layer for the optical display element may be formed at the same time by using the material constituting the above.

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, 28 4th support layer, 31 1st laminate, 32 through hole, 33 2nd laminate, 34 3rd laminate, 35 4th laminate, 36 through hole, 40,41 Polarizer composite, 45,46 Optical laminate, 50 Reinforcing material, 51 cells, 52 Through holes, 53 Cell bulkheads, 55 cell areas, 56 Non-cell areas, 58 Reinforcing material forming structures, 59 Perforated Structure.

Claims

A polarizer complex having a polarizer and a reinforcing material provided on at least one surface side of the polarizer.
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 reinforcing material is
A plurality of cells having an open end face are provided, and each open end face is arranged so as to face the surface of the polarizer.
It has a cell region in which the cell exists and exists in a region corresponding to the polarized light region, and a non-cell region in which the cell does not exist and exists in a region corresponding to the non-polarized region.
The non-polarized region and the non-cell region include a cured product of an active energy ray-curable resin, and the cured product contained in the non-polarized region is provided in a through hole surrounded by the polarized region in a plan view. Polarizer complex.
The polarizer composite according to claim 1, wherein the reinforcing material is provided on both sides of the polarizer.
The polarizer complex according to claim 1 or 2, wherein the thickness of the cured product is the same as the total thickness of the polarization region and the cell region.
The polarizer complex according to claim 1 or 2, wherein the thickness of the cured product is smaller than the total thickness of the polarization region and the cell region.
The polarizer complex according to claim 1 or 2, wherein the thickness of the cured product is larger than the total thickness of the polarization region and the cell region.
The polarizer complex according to any one of claims 1 to 5, wherein the non-polarized region has translucency.
The polarizer complex according to any one of claims 1 to 6, 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 7, wherein the active energy ray-curable resin contains an epoxy compound.
The polarizer complex according to claim 8, wherein the epoxy compound contains an alicyclic epoxy compound.
The polarizer complex according to any one of claims 1 to 9, wherein the shape of the opening of the cell is a polygonal shape, a circular shape, or an elliptical shape.
The polarizer complex according to any one of claims 1 to 10, further comprising a translucent filler in the internal space of the 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 11.
The protective layer provided on one side of the polarizer composite is made of the same active energy ray-curable resin as the active energy ray-curable resin constituting the cured product contained in the non-polarized region and the non-cell region. The optical laminate according to claim 12, which is a cured product layer.