TW202117369A - Polarizer composite and optical laminate - Google Patents

Abstract

An object of the present invention is to provide a polarizer composite with a novel polarizer and an optical laminate.

The polarizer composite has a polarizer, 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. The polarizer has a polarizing region having a thickness of 15 μm or less and a non-polarizing region surrounded by the polarizing region in a plan view. The first reinforcing material has multiple first cells having open end faces, and each open end face is arranged so as to face the surface of the polarizer. The first reinforcing material has a cell region in which the first cells exist and which exists in a region corresponding to the polarizing region, and a non-cell region in which the first cells do not exist and which exists in a region corresponding to the non-polarizing region. The second reinforcing material has multiple second cells having open end faces, and each open end face is arranged so as to face the surface of the polarizer. The second reinforcing material has the multiple second cells, and the second cells are present in a region corresponding to at least the non-polarizing region. The non-polarizing region and the non-cell region contain a cured product of an active energy ray-curable resin, and the cured product contained in the non-polarizing region is provided in a through hole surrounded by the polarizing region in a plan view.

Description

Polarizer composite and optical laminate

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

Polarizers are widely used as polarized light supply elements or polarized light detection elements in display devices such as liquid crystal display devices or organic electroluminescence (EL) display devices. Display devices with polarizers have also been extended to mobile devices such as notebook personal computers or mobile phones. Due to the requirements for diversification of display purposes, clarification of display partitions, and decoration, it is expected that areas with different transmittances Polarizer. Especially for small and medium-sized portable terminals represented by smartphones or tablet terminals, from a decorative point of view, in order to create a design with no borders on the entire surface, polarized light is sometimes attached to the entire display surface. sheet. In this case, a polarizer may be superimposed on the area of the camera lens, the icon under the screen, or the area where the logo is printed. Therefore, there is a problem that the sensitivity of the camera and the design are deteriorated.

For example, Patent Document 1 describes that a polarizer contained in a polarizing plate is partially provided with a dichroic substance low-concentration portion with a relatively low content of dichroic substance, and the camera is arranged to correspond to the dichroic substance low-concentration portion , Which will not adversely affect the performance of the camera.

[Prior Technical Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2015-215609

In Patent Document 1, by applying a chemical treatment in which an alkaline solution is contacted with a resin film containing a dichroic substance, the resin film is partially decolorized to form a low-concentration portion of the dichroic substance. The alkaline solution used for decolorization requires time and cost because it is treated as a waste liquid. In addition, Patent Document 1 describes that when iodine is used as a dichroic substance, by contacting it with an alkaline solution, the content of iodine can be reduced to form a low-concentration portion of the dichroic substance. However, it did not disclose a specific method of forming a low-concentration portion of a dichroic substance when using a dichroic substance other than iodine.

The object of the present invention is to provide a polarizer composite and an optical laminate provided with a novel polarizer, which replaces the polarizer in which regions with low dichroic substance content are formed by chemical treatment such as decolorization.

The present invention provides the following polarizer composite and optical laminate.

[1] A polarizer composite body comprising a polarizer, a first reinforcing material provided on one side of the polarizer, and a second reinforcing material provided on the other side of the polarizer, wherein:

The aforementioned polarizer has a polarized area with a thickness of 15 μm or less and a non-polarized area surrounded by the aforementioned polarized area when viewed from above,

The aforementioned first reinforcing material has a plurality of first cells with open end faces, and each of the open end faces is arranged in a manner facing the surface of the aforementioned polarizer;

The first reinforcing material has a cell region and a non-cell region. The cell region has the first cell and the cell region exists in the region corresponding to the polarization region, and the non-cell region does not exist. The aforementioned first cell and the non-cell region exists in a region corresponding to the aforementioned non-polarized region,

The aforementioned second reinforcing material has a plurality of second cells with open end surfaces, and each of the open end surfaces is arranged in a manner facing the surface of the aforementioned polarizer;

The aforementioned second cell cavity exists at least in an area corresponding to the aforementioned non-polarized area,

The non-polarized region and the non-cellular region contain a cured product of active energy ray curable resin,

The hardened substance contained in the non-polarized region is provided in a through hole surrounded by the polarized region in a plan view.

[2] The polarizer composite as described in [1], wherein the thickness of the cured product is the same as the total thickness of the thickness of the polarizing region and the thickness of the cell region.

[3] The polarizer composite as described in [1], wherein the thickness of the cured product is smaller than the total thickness of the thickness of the polarizing region and the thickness of the cell region.

[4] The polarizer composite as described in [1], wherein the thickness of the cured product is greater than the total thickness of the thickness of the polarizing region and the thickness of the cell region.

[5] The polarizer composite as described in any one of [1] to [4], wherein the non-polarizing region has translucency.

[6] The polarizer composite as described in any one of [1] to [5], wherein the diameter of the non-polarized region in a plan view is 0.5 mm or more and 20 mm or less.

[7] The polarizer composite according to any one of [1] to [6], wherein the active energy ray curable resin system contains an epoxy compound.

[8] The polarizer composite as described in [7], wherein the epoxy compound contains an alicyclic epoxy compound.

[9] The polarizer composite as described in any one of [1] to [8], wherein the shapes of the openings of the first cell and the second cell are independently polygonal and circular, respectively. Shape, or oval.

[10] The polarizer composite as described in any one of [1] to [9], in which a translucent filler is further provided in the inner space of the first cell.

[11] The polarizer composite as described in any one of [1] to [10], in which a translucent filler is further provided in the inner space of the second cell.

[12] An optical laminate having a protective layer on one side or both sides of the polarizer composite described in any one of [1] to [11].

According to the present invention, it is possible to provide a polarizer composite body and an optical laminate provided with a novel polarizer.

10: Polarizer

11: Polarized area

11m: first plane

11n: second plane

12: Non-polarized area

17,18: protective layer

20: Raw material polarizer

21: Polarizer with aperture

22: Through hole

25: The first support layer

26: second support layer

27: The third support layer

28: The fourth support layer

31: The first layered body

32: Through hole

33: The second layered body

34: The third layered body

35: The fourth layered body

36: Through hole

40, 41: Polarizer composite

45: Optical laminate

50: The first reinforcing material

51: first cell

52: Through hole

53,63: cell wall

55: Cell cavity area

56: non-cell area

58: Structures and structures for forming reinforcing materials

59: Structure with openings

60: second reinforcing material

61, 62: second cell

Fig. 1(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present invention, and Fig. 1(b) is a schematic plan view of the first reinforcing member side of the polarizer composite shown in Fig. 1(a) , Fig. 1(c) is a schematic plan view of the second reinforcing material side of the polarizer composite shown in Fig. 1(a).

2(a) and 2(b) are schematic cross-sectional views schematically showing another example of the polarizer composite of the present invention.

Figures 3(a) and 3(b) are diagrams schematically showing an example of a cross section around the non-polarized region and the non-cellular region of the polarizer composite, and are used to illustrate the placement in the non-polarized region and the non-cellular region An explanatory diagram of the method of determining the thickness of the hardened material in the area.

4(a) to 4(d) are schematic cross-sectional views schematically showing an example of the manufacturing method of the polarizer composite of the present invention.

5(a) and 5(b) are schematic cross-sectional views schematically showing successively the manufacturing method of the polarizer composite shown in FIG. 4.

Fig. 6 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present invention.

Hereinafter, preferred embodiments of the polarizer, polarizer composite, and optical laminate of the present invention will be described with reference to the drawings. In all the following drawings, the scales are adjusted appropriately for easy understanding of the constituent elements. The scales of the constituent elements shown in the drawings and the actual constituent elements do not necessarily match.

<Polarizer Complex>

Fig. 1(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of this embodiment, and Fig. 1(b) is the first reinforcing material side of the polarizer composite shown in Fig. 1(a) A schematic plan view. Fig. 1(c) is a schematic plan view of the second reinforcing member side of the polarizer composite shown in Fig. 1(a). 2(a) and 2(b) are schematic cross-sectional views showing another example of the polarizer composite of this embodiment. Figure 1 and Figure 2 The illustrated polarizer composite 40 has a polarizer 10, a first reinforcing material 50 provided on one side of the polarizer 10, and a second reinforcing material 60 provided on the other side of the polarizer 10.

The polarizer 10 included in the polarizer composite 40 has a polarizing area 11 and a non-polarizing area 12 as shown in FIG. 1( a ). The thickness of the polarizing region 11 is 15 μm or less.

The arrangement of the polarized area 11 and the non-polarized area 12 in the polarizer 10 is not particularly limited as long as the polarized area 11 surrounds the non-polarized area 12. When the polarizer 10 is viewed from above, 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 only needs to have one non-polarized area 12, and may also have two or more non-polarized areas 12. When there are more than two non-polarized regions 12, the shapes of the non-polarized regions 12 may be the same or different from each other.

The first reinforcing material 50 of the polarizer composite body 40 is shown in FIG. 1(b) as an example, and has a plurality of first cells 51 with open end surfaces, and each of the open end surfaces is connected to the polarizer 10 The faces are arranged facing each other. The first reinforcing material 50 has a cell region 55 in which the first cell 51 is present, and a non-cell region 56 in which the first cell 51 is not present. The first cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell wall 53 dividing the first cell 51, and both ends of the columnar structure are opened through openings. Open end face. The non-cell region 56 where the first cell 51 does not exist means that there is no cell wall 53 constituting the first cell 51 and a hollow columnar (cylindrical) surrounded by the cell wall 53 The area of space.

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. Area. Here, the so-called cell region 55 existing in the region corresponding to the polarized region 11 means that the cell region 55 and the polarized region 11 are substantially opposite to each other in the plan view direction. The meaning of the same shape and approximately the same size. Similarly, the so-called non-cellular area 56 existing in the area corresponding to the non-polarized area 12 means that the non-cellular area 56 and the non-polarized area 12 are at approximately the same position in the top view direction. It means roughly the same shape and roughly the same size (diameter). In other words, when the non-cellular area 56 is projected onto the polarizer 10 in the top view direction, the projection area of the non-cellular area 56 is substantially the same as the non-polarized area 12 in the polarizer 10. By the manufacturing method of the polarizer composite body described later, the polarizer composite body in which the cell region 55 exists in the region corresponding to the polarizing region 11 can be efficiently manufactured. When the polarizer 10 contained in the polarizer composite 40 has two or more non-polarized regions 12, if there is a non-cellular region 56 in at least one region corresponding to the non-polarized region 12, the non-polarized region 56 will be used in other non-polarized regions. The area corresponding to the polarization area 12 may also have a cell area 55.

The second reinforcing material 60 of the polarizer composite 40 is shown in FIG. 1(c) as an example, and has a plurality of second cells 61 with open end surfaces, and each open end surface is connected to the polarizer 10 The faces are arranged facing each other. The second reinforcing material 60 has, like the first cell 51, a hollow columnar (cylindrical) structure that surrounds the cell wall 63 dividing the second cell 61, and the axial direction of the columnar structure Both ends are opened to become open end faces. The second reinforcing material 60 is different from the first reinforcing material 50 in that a second cell 61 is also present in the region corresponding to the non-polarized region 12 (the part represented by the wavy line in FIG. 1(c)). The second reinforcing material 60 preferably has a second cell 61 in both the polarized region 11 and the non-polarized region 12, and more preferably the second cell 61 exists on the entire surface of the polarizer 10.

The non-polarized region 12 of the polarizer 10 and the non-cell region 56 of the first reinforcing material 50 contain a cured product of active energy ray curable resin (hereinafter, also referred to as "curable resin (X)"). The non-polarized region 12 is a region where 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-cell region 56 is provided with a sclerosing property in the through hole 52 In the area of the cured resin (X), the through hole 52 is provided in such a way that the entire or part of the plurality of first cells 51 is missing and is provided in the area corresponding to the through hole 22. The through hole 22 of the polarizer 10 and the through hole 52 of the first reinforcing material 50 can be set to have the same shape in a plan view. The through hole 22 and the through hole 52 may be connected in the thickness direction of the polarizing region 11, and a cured product of the curable resin (X) may be continuously provided in the through holes 22 and 52 that communicate with each other.

The polarizer 10 included in the polarizer composite 40 has a non-polarized region 12 as shown in FIG. 1( a ). Therefore, when the polarizer composite 40 is applied to a display device such as a liquid crystal display device such as a smartphone or a tablet terminal, or an organic EL display device, the camera lens is arranged in a manner corresponding to the non-polarized region 12 The printing part of, icon, logo, etc. can suppress the decrease of the sensitivity of the camera and the decrease of the design.

In the polarizer composite 40, it is believed that because the polarizer 10 contains the non-polarized area 12, the periphery of the non-polarized area 12 is prone to cracks due to the shrinkage of the polarizer 10. The shrinkage of the polarizer 10 is accompanied by the shrinkage of the polarizer 10 The temperature changes during the installation. In addition, since the thickness of the polarizing region 11 of the polarizer 10 is as thin as 15 μm or less, it is prone to cracks when it receives an impact. In the polarizer composite 40, since the first reinforcing material 50 and the second reinforcing material 60 are respectively provided on both sides of the polarizer 10 as described above, the generation of cracks due to temperature changes or impacts can be suppressed. , Or small cracks deteriorate into large cracks.

In the polarizer composite 40, the through holes 22 of the polarizer 10 and the through holes of the first reinforcing material 50 can be formed by making the non-polarizing region 12 and the non-cellular region 56 contain a cured product of the curable resin (X). 52 is set as solid. Since the polarizer 10 of the polarizer composite 40 has a thickness of 15 μm or less, if the non-polarized region 12 is not provided with a cured product of the curable resin (X) and the through hole 22 is hollow, the When applied to display devices, etc., the temperature The shrinkage of the polarizer caused by the change may cause defects such as cracks in the periphery of the through hole 22. On the other hand, like the polarizer 10 of the polarizer composite 40, the non-polarized region 12 and the non-cellular region 56 can be cured by providing the through hole 22 and the through hole 52 with a cured product of the curable resin (X). It is set to be solid, so the occurrence of the above-mentioned disadvantages can be suppressed.

The thickness of the cured product of the curable resin (X) provided in the polarizer composite 40 may be the same as the total thickness of the thickness of the polarizing region 11 and the thickness of the cell region 55 (FIG. 1(a)), or less than The total thickness (Figure 2(a)) may be greater than the total thickness (Figure 2(b)). The cured product of the curable resin (X) provided in the polarizer composite 40 can be set 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 first reinforcing material 50 Copies. The cured product of the curable resin (X) is preferably set to fill the entire through hole 22 of the polarizer 10, more preferably set to fill the entire through hole 22 of the polarizer 10 and the through hole 52 of the first reinforcing material 50 overall.

The thickness of the cured product provided in the polarizer composite 40 is determined as follows. First, in the polarizer composite 40, it is assumed that the first plane including the surface of the polarizing region 11 of the polarizer 10 (the surface on the opposite side of the first reinforcing material 50 side) and the cell region including the first reinforcing material 50 The second plane of the open end surface of 55 (the open end surface on the opposite side of the polarizer 10 side). Next, in the non-polarized region 12, determine a first position and a second position. The first position is the position where the shortest distance between the surface of the hardened object on the side of the polarizer 10 and the first plane is the maximum, and the second position The position is the position when the shortest distance between the surface of the hardened object on the side of the first reinforcing material 50 and the second plane is the largest. Then, the total value (dm+dn+D) of the shortest distance of the first position (dm), the shortest distance of the second position (dn), and the distance (D) between the first plane and the second plane (dm+dn+D) is set in the polarized light The thickness of the hardened product of the sheet composite 40.

The method of determining the thickness when the thickness of the cured product provided in the non-polarized region 12 and the non-cellular region 56 is different from the total thickness of the polarized region 11 and the cell region 55 will be specifically explained based on FIG. 3. Figures 3(a) and 3(b) are diagrams schematically showing an example of a cross section around the non-polarized region and the non-cellular region of the polarizer composite, and are used to illustrate the arrangement in the non-polarized region and the non-cellular region An explanatory diagram of the method of determining the thickness of the hardened material in the area.

When the hardened material is provided in the non-polarized region 12 and the non-cellular region 56 as shown in FIG. 3(a), "along the side of the surface of the first reinforcing material 50 opposite to the side of the polarizer 10) The "straight line in the non-cell region 56" is assumed to be the first plane 11m. The length of the straight line connecting "an arbitrary point on the first plane 11m" and "an arbitrary point on the surface of the hardened object of the non-cell region 56" becomes the shortest distance (Figure 3 The position where "dm" in (a) becomes the largest is regarded as the first position. Next, as shown in FIG. 3(a), "a straight line indicated by a dashed-dotted line along the surface side of the polarizer 10 opposite to the side of the first reinforcing material 50 to the non-polarized region 12" is assumed to be The second plane 11n. The length of the straight line connecting "an arbitrary point on the second plane 11n" and "an arbitrary point on the surface of the hardened object provided in the non-polarized region 12" is the shortest distance (Fig. 3( The position where "dn" in a) becomes the maximum is regarded as the second position. Here, as shown in FIG. 3(a), in the thickness direction of the polarizer composite 40, when the surface of the hardened object disposed in the non-polarized region 12 and the non-cellular region 56 exists in the first plane 11m and the second When the plane 11n is closer to the inner surface side (the polarizer 10 and the first reinforcing material 50 side), dm and dn are shown as negative values. Also, let D be the distance between the first plane 11m and the second plane 11n. In this way, the thickness of the hardened material provided in the non-polarized region 12 and the non-cell region 56 shown in FIG. 3(a) can be determined as D+dm+dn (dm and dn are negative values).

In addition, when a hardened substance is provided in the non-polarized region 12 and the non-cell region 56 as shown in FIG. 3(b), the same as the above, the first plane 11m and the second plane 11n can be assumed , To determine the thickness of the hardened object disposed in the non-polarized region 12 and the non-cellular region 56. Specifically, first, the straight line connecting "any point on the first plane 11m" and "any point on the surface of the hardened object of the first reinforcing material 50" becomes the shortest straight line. The first position is the position where the length ("dm" in Figure 3(b)) becomes the largest. Next, among the shortest straight lines connecting "any point on the second plane 11n" and "any point on the surface of the hardened object provided in the non-polarized region 12", the length of the straight line (Figure 3 The position when "dn" in (b) becomes the largest is regarded as the second position. Here, as shown in FIG. 3(b), in the thickness direction of the polarizer composite body 40, when the surface of the hardened object disposed in the non-polarized region 12 and the non-cell region 56 exists in the first plane 11m and the second When the plane 11n is closer to the outer side (the opposite side of the polarizer 10 and the first reinforcing material 50), dm and dn are shown as positive values. In this way, the thickness of the hardened material provided in the non-polarized region 12 and the non-cell region 56 shown in FIG. 3(b) can be determined as D+dm+dn (dm and dn are positive values).

As for the polarizer composite 40 shown in FIG. 2(a), the second reinforcing material 60 can enter the through hole 22 of the polarizer 10 and is a cured product of the curable resin (X) provided in the through hole 22 on. As for the polarizer composite 40 shown in FIG. 2(b), a second reinforcing material 60 may be provided on the surface of the cured product of the curable resin (X) provided to protrude from the through hole 22 of the polarizer 10 .

Regarding the first reinforcing material 50 and the second reinforcing material 60 of the polarizer composite 40, the first cell 51 and the second cell 61 of the first reinforcing material 50 and the second reinforcing material 60, respectively The shapes and sizes may be the same as each other, or the shapes and sizes may be different from each other in at least one of the shapes and sizes. The opening of the first cell 51 of the first reinforcing material 50 provided on the polarizer 10 and the first The openings of the second cell 61 of the two reinforcing materials 60 can be arranged to overlap each other when viewed from above, but are preferably arranged to be staggered.

The polarizer composite 40 is applied to a display device and the like in a state including the polarizer 10, the first reinforcing material 50, and the second reinforcing material 60. If the inner 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, it will be due to the refractive index of the cell wall 53 and the inner space of the first cell 51. The difference and the difference in refractive index between the cell wall 63 and the inner space of the second cell 61 may reduce the visibility of the display device. Therefore, 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 composite body 40 are preferably provided with light-transmitting Filling material. Regarding the first reinforcing material 50 and the second reinforcing material 60 of the polarizer composite 40, when a gap is provided between a plurality of first cells 51 or a plurality of second cells 61 as described later Preferably, a translucent filler is also provided in the gap.

In this specification, the so-called light transmittance refers to the property of transmitting more than 80% of visible light in the wavelength range of 400nm to 700nm (transmittance), preferably 85% or more, more preferably 90% or more, and more preferably The transmission is above 92%. The following definition of "transmittance" and the preferred range of transmittance to visible light are also the same as above.

The polarizer composite 40 may be a sheet-shaped body, or may be an elongated body having a length that is wound into a roll shape during storage or transportation. The planar shape and size of the polarizer composite 40 are not particularly limited.

(Polarized area)

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

For the polarizing region 11, for example, two-color substances such as iodine or two-color dyes can be adsorbed/aligned to polyvinyl alcohol-based films, partially formalized polyvinyl alcohol-based films, ethylene/vinyl acetate copolymer-based partially saponified films, etc. It is made of polymer film; it is used for dehydration treatment of polyvinyl alcohol or dehydrochloric acid treatment of polyvinyl chloride, polyolefin-based alignment film or aligned liquid crystal compound that adsorbs/aligns dichroic substances, etc. Among them, it is preferable to use a polyvinyl alcohol-based film dyed with iodine and uniaxially stretched in terms of excellent optical properties.

First, the manufacturing method of the polyvinyl alcohol-based film that will become the preferred polarizing region 11 is dyed with iodine and uniaxially stretched.

Dyeing with iodine can be performed, for example, by immersing a polyvinyl alcohol-based film in an iodine aqueous solution. The stretching magnification of uniaxial stretching is preferably 3 to 7 times. It can be stretched after dyeing, or stretched while dyeing. Also, dyeing may be performed after stretching.

The polyvinyl alcohol-based film may be subjected to swelling treatment, cross-linking treatment, washing treatment, drying treatment, etc. as needed. For example, by immersing the polyvinyl alcohol-based film in water for washing before dyeing, not only can the surface of the polyvinyl alcohol-based film be cleaned of dirt or anti-blocking agent, but also the polyvinyl alcohol-based film can be swollen to prevent staining. equal.

The stretching treatment, dyeing treatment, crosslinking treatment (boric acid treatment), water washing treatment, and drying treatment of the polyvinyl alcohol-based resin film can be performed, for example, according to the method described in JP 2012-159778 A. In the method described in this document, a polyvinyl alcohol-based resin layer is formed by applying a polyvinyl alcohol-based resin to a base film. In this case, the base film used can also be used as the first support layer 25 described later.

Next, a brief description will be given of the polarization region 11 formed by the adsorption/alignment of the dichroic dye on the aligned liquid crystal compound. In this case, the polarizing region 11 can be used, for example, as described in Japanese Patent Application Publication No. 2013-37353, Japanese Patent Application Publication No. 2013-33249, Japanese Patent Application Publication No. 2016-170368, Japanese Patent Application Publication No. 2017-83843, etc. Those with dichroic pigments aligned in the cured film formed by the polymerization of liquid crystal compounds. Dichroic dyes can be used for those with absorption in the wavelength range of 380 to 800 nm, and organic dyes are preferably used. Examples of dichroic dyes include azo compounds. The liquid crystal compound is a liquid crystal compound that can be polymerized in an aligned state, and can have a polymerizable group in the molecule. The cured film formed by polymerization of such a liquid crystal compound can be formed on a base film. In this case, the base film can also be used as the first support layer 25 described later.

After the polarizing film used in the polarizing region 11 is fabricated as described above, it is preferable to form the non-polarizing region 12 by perforation processing to form the polarizing film 10. In this specification, the polarizing film formed by only the polarizing region 11 in this way is sometimes referred to as the raw material polarizer 20.

The visual sensitivity correction polarization (Py) of the polarization region 11 is preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more. The monomer transmittance (Ts) of the polarizing region 11 is usually less than 50%, and may be less than 46%. The monomer transmittance (Ts) of the polarizing region 11 is preferably 39% or more, more preferably 39.5% or more, still more preferably 40% or more, particularly preferably 40.5% or more.

The single transmittance (Ts) is the Y value obtained by measuring and calibrating the visual sensitivity according to the 2 degree field of view (light source C) of JIS Z8701. The visual sensitivity correction polarization (Py) can be measured using, for example, an ultraviolet-visible spectrophotometer (manufactured by JASCO Corporation, product name: V7100). Based on the parallel transmittance Tp and the orthogonal transmittance Tc after the visual sensitivity correction, It can be obtained by the following formula.

Py[%]={(Tp-Tc)/(Tp+Tc)} ^1/2 ×100

The thickness of the polarizing region 11 is 15 μm or less, may be 13 μm or less, may be 10 μm or less, may be 8 μm or less, or may be 5 μm or less, and is usually 1 μm or more. If the thickness of the polarized region 11 exceeds the above-mentioned range, the workability for providing a cured product of the active energy ray curable resin (X) containing the curable resin (X) described later in the non-polarized region 12 is likely to decrease. In addition, when the polarization region 11 is less than the aforementioned range, it may be difficult to obtain the 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 Co., Ltd.).

(Non-polarized area)

Generally speaking, the so-called "unpolarized light" refers to the irregular light that can be observed in the electric field component. In other words, the so-called non-polarized light system cannot observe the random light with the advantageous specific polarization state. In addition, the term "partially polarized light" refers to light in an intermediate state between polarized light and non-polarized light, and refers to light that is a mixture of at least one of linearly polarized light, circularly polarized light, and elliptical polarized light, and non-polarized light. The non-polarized area 12 of the polarizer 10 means that the light (transmitted light) transmitted through the non-polarized area 12 becomes non-polarized or partially polarized. Especially preferably, the transmitted light is a non-polarized non-polarized area.

The non-polarized area 12 of the polarizer 10 is an area surrounded by the polarized area 11 when viewed from above. The non-polarized region 12 contains a cured product of curable resin (X). The non-polarized region 12 is preferably provided with an active energy ray curable resin composition containing a curable resin (X) described later in a through hole provided in a polarizer (raw polarizer 20) formed by only the polarized region 11 Of hardened things. The non-polarized light region 12 has light transmittance.

By making the non-polarized region 12 of the polarizer 10 light-transmissive, the optical transparency in the non-polarized region 12 can be ensured. Therefore, when the polarizer composite 40 is applied to a display device In this case, printing parts such as camera lenses, icons, logos, etc. can be arranged corresponding to the non-polarized regions 12, thereby suppressing the deterioration of the camera sensitivity or the deterioration of the design.

The planar shape of the non-polarized light region 12 is not particularly limited, but it can be round; elliptical; oval; polygons such as triangles or quadrangles; at least one corner of the polygon is rounded (shaped with R). Polygon and so on.

The diameter of the non-polarized region 12 is preferably 0.5 mm or more, may be 1 mm or more, may be 2 mm or more, or may be 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 refers to the length of the longest straight line connecting any two points on the outer periphery of the non-polarized region 12.

The thickness of the cured product of the curable resin (X) provided in the non-polarized area 12 may be the same as the thickness of the polarized area 11, may be smaller than the thickness of the polarized area 11, or may be greater than the thickness of the polarized area 11. 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 can be measured according to the method for measuring the thickness of the cured product provided in the polarizer composite 40 as described above. Specifically, in the above-mentioned measurement method, the first plane is set as the surface of the polarizing region 11 of the polarizer 10 (the surface on the side of the first reinforcing material 50), and the thickness of the cured product of the curable resin (X) is determined can.

(Cell area of the first reinforcing material)

The cell area 55 is an area of the first reinforcing material 50 where the first cell 51 exists. As shown in FIG. 1(b), the first cell 51 has a hollow columnar (cylindrical) structure surrounded by a cell wall 53 dividing the first cell 51, and the columnar structure The two ends of the axis are open and become open ends surface. The first cell 51 has a first opening end surface arranged on the near side opposite to the polarizer 10 of the polarizer assembly 40, and a second opening end surface arranged on the opposite far side as an opening end surface. If at least one of the first open end surface and the second open end surface of the cell area 55 is arranged in a manner opposite to the polarizer 10, it is preferable that both the first open end surface and the second open end surface are aligned with The polarizers 10 are arranged facing each other.

The opening shape of the first cell 51 of the cell region 55 is not particularly limited, but a polygonal, circular, or elliptical shape is preferable. The opening shape of the first opening end surface and the opening shape of the second opening end surface are preferably the same shape and the same size, but they can also be different shapes, or the same shape but different sizes. In addition, the opening shapes of the plurality of first cells 51 in the cell region 55 may be the same or different from each other.

The plurality of first cavities 51 of the cell region 55 are preferably arranged in a plan view of the opening end surface in such a manner that the openings of the first cavities 51 are adjacent to each other. When the plurality of first cells 51 are viewed in a plan view of the open end surface, for example, as shown in FIG. 1(b), the opening shape of the first cell 51 is hexagonal, etc., so that the first cells 51 are mutually exclusive. Arranged in an intermittently arranged manner. Or, when the plurality of first cavities 51 are viewed from the top of the open end surface, the shape of the opening of the first cavities 51 may be circular, etc., so that the cell walls 53 of the plurality of first cavities 51 Some of them are arranged in contact with each other and arranged with a gap between the plurality of first cells 51.

Preferably, the cell area 55 of the first reinforcing material 50 is, for example, as shown in FIG. 1(b), the opening shape at any one of the first opening end surface and the second opening end surface is hexagonal, and in the polarizer The surface direction of the composite body 40 has a honeycomb structure in which a plurality of first cells 51 are arranged such that the openings are adjacent to each other without gaps.

The size of the opening of the first cell 51 is not particularly limited, but preferably has 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, or may be 1 mm or less, usually 0.1 mm or more, or 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 any two points on the outer periphery 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, may be 1 μm or more, or may be 3 μm or more, and usually It is 15 μm or less, may be 13 μm or less, or may be 10 μm or less.

The cell wall 53 of the cell region 55 that divides the first cell 51 is preferably light-transmissive.

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

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

(The non-cell area of the first reinforcing material)

The non-cell region 56 is the region of the first reinforcing material 50 where the first cell 51 does not exist. As described above, the cell wall 53 and the cell wall of the first cell 51 are not present. 53 is an area surrounded by a hollow columnar (cylindrical) space. The non-cell region 56 has a through hole 52, which penetrates The perforation 52 is provided in such a manner that the entire or a part of the plurality of first cells 51 is missing, and is provided in an area corresponding to the through hole 22 of the polarizer 10. The non-cell region 56 may contain a cured product of 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-polarizing region 12.

(Second reinforcing material)

The second cell 61 of the second reinforcing material 60 is shown in FIG. 1(c), and has a hollow columnar (cylindrical) shape surrounded by a cell wall 63 that divides the second cell 61 ) Structure, and both ends of the columnar structure in the axial direction are opened to become open end faces. The second cell 61 has a first' opening end surface arranged on the near side opposite to the distance of the polarizer 10 of the polarizer assembly 40, and a second' opening end surface arranged on the opposite far side as the opening end surface. The second reinforcing material 60 may be arranged so that at least one of the first' opening end surface and the second' opening end surface is opposed to the polarizer 10, and it is preferably one of the first' opening end surface and the second' opening end surface. Both are arranged in a manner facing the polarizer 10.

The opening shape of the second cell 61 of the second reinforcing material 60 can be exemplified as the opening shape of the first cell 51. The opening shape of the first' opening end surface and the opening shape of the second' opening end surface are preferably the same shape and the same size, but may be different shapes, or the same shape but different sizes. In addition, the opening shapes of the plurality of second cells 61 may be the same or different from each other.

The plurality of second cells 61 of the second reinforcing material 60 are preferably arranged in a plan view of the opening end surface such that the openings of the second cells 61 are adjacent to each other. Plural second cell In a plan view of the opening end surface of the cavity 61, for example, as shown in FIG. 1(c), the opening shape of the second cell 61 is hexagonal, etc., so that the second cells 61 are arranged without gaps. To arrange. Alternatively, when the plurality of second cavities 61 are viewed from the top of the open end surface, the shape of the opening of the second cavities 61 may be circular, etc., so that the cell walls 63 of the plurality of second cavities 61 Some of them are arranged in contact with each other and arranged with gaps between the plurality of second cells 61.

The second reinforcing material 60 is preferably, for example, as shown in FIG. 1(c), the opening shape at any one of the first' opening end surface and the second' opening end surface is hexagonal, and the polarizer composite body 40 The surface direction has a honeycomb structure in which a plurality of second cells 62 are arranged such that the openings are adjacent to each other without gaps.

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 51. The light transmittance, line width and material of the cell wall 63 of the second reinforcing material 60 which divide the second cell 61 can be set as exemplified for the cell wall 53 which divides the first cell 51, for example. Transmittance, line width, and material.

(Active energy ray curable resin composition (curable resin composition))

The non-polarized region 12 and the non-cell region 56 in the polarizer composite 40 are, as described above, the region where the cured product of the active energy ray curable resin (curable resin (X)) is provided, and is preferably composed of This curable resin (X) is formed of an active energy ray curable resin composition (hereinafter also 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 ultraviolet irradiation. The curable resin composition containing the curable resin (X) may be an active energy ray curable adhesive. In this case, it is more preferably an ultraviolet curable adhesive.

The curable resin composition is preferably a solvent-free type. The solvent-free type means that no solvent is actively added. Specifically, the solvent-free curable resin composition refers to 100% by weight of the curable resin (X) contained in the curable resin composition. The solvent The content is 5% by weight or less.

The curable resin (X) preferably contains an epoxy compound. The so-called epoxy compound refers to a compound having one or more (preferably two or more) epoxy groups in the molecule. Examples of the epoxy compound include alicyclic epoxy compounds, aliphatic epoxy compounds, and hydrogenated epoxy compounds (glycidyl ethers of polyhydric alcohols having an alicyclic ring). The epoxy compound contained in the curable resin (X) may be one type or two or more types.

The content of the epoxy compound relative to 100% by weight of the curable resin (X) is preferably 40% by weight or more, more preferably 50% by weight or more, and still more preferably 60% by weight or more. With respect to 100% by weight of the curable resin (X), the content of the epoxy compound may be 100% by weight or less, and may be 90% by weight or less, 80% by weight or less, or 75% by weight or less.

The epoxy equivalent of the epoxy compound is usually 40 to 3000 g/equivalent, preferably in the range of 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 an alicyclic ring in the molecule. The "epoxy group bonded to an alicyclic ring" refers to the bridged oxygen atom -O- in the structure shown in the following formula. In the following formula, m is an integer of 2 to 5.

_{Compounds in which one or more hydrogen atoms of (CH 2} ) _m in the above formula are removed and bonded to other chemical structures can become alicyclic epoxy compounds. 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, epoxy compounds with oxabicyclohexane ring (where m=3 in the above formula) or oxabicycloheptane ring (where m=4 in the above formula) can be used for The polarized region 11 of the polarizer 10 and the cell region 55 of the first reinforcing material 50 and the cured product of the curable resin (X) forming the non-polarized region 12 and the non-cell region 56 provide excellent adhesion, so Can be used better. The alicyclic epoxy compounds that can be preferably used are specifically exemplified below, but they are not limited to these compounds.

[a] The epoxy cyclohexyl methyl esters of epoxy cyclohexane carboxylic acid represented by the following formula (IV):

[In formula (IV), R ⁸ and R ⁹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms].

[b] The epoxy cyclohexane carboxylates of alkanediol represented by the following formula (V):

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

[c] Epoxy cyclohexyl methyl esters of dicarboxylic acids represented by the following formula (VI):

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

[d] Epoxy cyclohexyl methyl ethers of polyethylene glycol represented by the following formula (VII):

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

[e] The epoxy cyclohexyl methyl ethers of alkanediol represented by the following formula (VIII):

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

[f] Diepoxy trispiro compound represented by the following formula (IX):

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

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

[In the formula (X), R ²⁰ and R ²¹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms].

[h] Vinyl cyclohexene diepoxides 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 independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms].

[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 polyglycidyl ethers of aliphatic polyols or alkylene oxide adducts thereof. More specifically, for example, the diglycidyl ether of 1,4-butanediol; the diglycidyl ether of 1,6-hexanediol; the triglycidyl ether of glycerol; the trimethylolpropane Triglycidyl ether; diglycidyl ether of polyethylene glycol; diglycidyl ether of propylene glycol; by adding one or more epoxy resins to aliphatic polyols such as ethylene glycol, propylene glycol or glycerin Polyglycidyl ether of polyether polyol derived from alkyl (ethylene oxide or propylene oxide).

The hydrogenated epoxy compound is obtained by reacting an alicyclic polyol obtained by hydrogenating the aromatic ring of an aromatic polyol with epichlorohydrin. Examples of aromatic polyols include: bisphenol-type compounds such as bisphenol A, bisphenol F, and bisphenol S; novolac-type resins such as phenol novolak resin, cresol novolak resin, and hydroxybenzaldehyde phenol novolak resin; Multifunctional compounds such as hydroxydiphenylmethane, tetrahydroxydiphenylketone, and polyvinylphenol. A preferable one among the hydrogenated epoxy compounds includes, for example, the diglycidyl ether of hydrogenated bisphenol A.

The curable resin (X) may contain a (meth)acrylic compound and the like together with an active energy ray curable compound such as an epoxy compound. By using (meth)acrylic compounds in combination, it can be expected to increase the polarization region 11 of the polarizer 10 and the cell region 55 of the first reinforcing material 50 and the curable resin (X The effect of the adhesion between the cured products of ), the hardness and mechanical strength of the cured product of the curable resin (X), and the adjustment of the viscosity, curing speed, etc. of the curable resin (X) get on. "(Meth)acrylic acid" means at least one selected from the group consisting of acrylic acid and methacrylic acid.

The curable resin composition containing the curable resin (X) preferably contains a polymerization initiator. The polymerization initiator may include, for example, cationic polymerization initiators such as photocationic polymerization initiators, or Free radical polymerization initiator. The photocationic polymerization initiator is one that generates cationic species or Lewis acid by irradiation with active energy rays such as visible light, ultraviolet rays, X-rays, and electron rays, and initiates the polymerization reaction of epoxy groups. As described above, the curable resin (X) is preferably an ultraviolet curable resin that is cured by ultraviolet radiation. Since the curable resin (X) preferably contains an alicyclic epoxy compound, the polymerization in this case The initiator is preferably one that generates cationic species or Lewis acid by irradiation with ultraviolet rays.

The curable resin composition may further contain photosensitizers, polymerization accelerators, ion traps, antioxidants, chain transfer agents, tackifiers, thermoplastic resins, fillers, flow regulators, plasticizers, and defoamers Additives such as antistatic agent, antistatic agent, leveling agent, etc.

(Filling material)

If the filling material that can be set in the first reinforcing material 50 and the second reinforcing material 60 is translucent and can fill the inner space of the first cell 51 of the first reinforcing material 50 and the second reinforcing material 60 The internal space of the cell 61 is sufficient, and it is not particularly limited. The filling material is preferably a material different from the material constituting the cell wall 53 of the first reinforcing material 50 and the cell wall 63 of the second reinforcing material 60, and a resin material is more preferable. The resin material may include, for example, one or more selected from the group consisting of thermoplastic resin, thermosetting resin, or curable resin such as active energy ray curable resin, etc., and it may also be a pressure-sensitive adhesive or adhesive. Agent.

Examples of thermoplastic resins include polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.), cyclic polyolefin resins (norbornene resins, etc.); cellulose triacetate, cellulose diacetate, etc. Cellulose ester resins; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate resins; (meth)acrylic resins; poly Styrene -Based resin; polyether-based resin; polyurethane-based resin; polyamide-based resin, polyimide-based resin; fluorine-based resin, etc.

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

Adhesives are those that exhibit adhesiveness by attaching themselves to the adherend, so-called pressure-sensitive adhesives. The adhesive may, for example, contain polymers such as (meth)acrylic polymers, silicone polymers, polyester polymers, polyurethane polymers, polyether polymers, or rubber polymers as main components. By. In this specification, the so-called main component refers to a component that contains 50% by mass or more in the total solid content of the adhesive. The adhesive can be an active energy ray hardening type or a thermal hardening type, and the crosslinking degree or adhesive force can also be adjusted by active energy ray irradiation or heating.

Adhesives are those containing curable resin components and are adhesives other than pressure-sensitive adhesives (adhesives). Examples of the adhesive include water-based adhesives prepared by dissolving or dispersing curable resin components in water, active energy ray curable adhesives containing active energy ray curable compounds, thermosetting adhesives, and the like.

The adhesive can also be a water-based adhesive commonly used in the technical field of polarizing plates. Examples of the resin component contained in the water-based adhesive include polyvinyl alcohol-based resins and urethane-based resins. 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. The active energy ray curable adhesive can also use the curable resin composition containing the curable resin (X) described above. Examples of thermosetting adhesives include epoxy resins, silicone resins, phenol resins, melamine resins, and the like as main components.

(Method of manufacturing polarizer composite)

4 and 5 are schematic cross-sectional views schematically showing an example of a method of manufacturing the polarizer composite 40 (FIG. 1(a)). Although shown in FIG. 4 and FIG. 5, the polarizer composite 40 shown in FIG. 1(a) is obtained However, the polarizer composite 40 shown in FIG. 2(a) and FIG. 2(b) can also be manufactured by the method described below. The polarizer composite 40 can be used, for example, on one side of the raw material polarizer 20 that has the same visual sensitivity correction polarization (Py) as a whole and does not have the non-polarized region 12, and is formed with only the cell region 55 without non-cellular The structure 58 for forming a reinforcing material of the cavity region 56 (hereinafter, also referred to as a "structure 58") is manufactured. Since the raw material polarizer 20 is formed only of the polarizing region 11 of the above-mentioned polarizer 10, the thickness of the raw material polarizer 20 is preferably the same thickness as that of the polarizing region 11 of the polarizer 10, that is, 15 μm or less. Since the structure 58 will become the cell area 55 of the first reinforcing material 50 described above, it is preferable to have the same thickness as the cell area 55 of the first reinforcing material 50.

The polarizer composite 40 can be manufactured by the following steps, for example. First, as shown in FIG. 4(a), a first support layer 25 is provided on one side of the raw polarizer 20 in a manner that can be peeled off from the raw polarizer 20, and then a structure is formed on the other side of the raw polarizer 20 58, and the first laminate 31 is prepared. The structure 58 can be made, for example, by using a resin material or an inorganic oxide to form a cell wall 53 dividing the first cell 51 on the surface of the raw polarizer 20.

The method of forming the cell 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; photoetching methods; coating methods using nozzles, molds, and the like. In the above method, a resin composition obtained by mixing a resin material, a solvent, additives, etc., can also be used. Examples of additives include levelers, antioxidants, plasticizers, tackifiers, organic or inorganic fillers, pigments, anti-aging agents, ultraviolet absorbers, antioxidants, and the like. The cell wall 53 can also be formed by curing or hardening the printed or coated resin composition as needed.

The method of using an inorganic oxide to form the cell partition wall 53 is not particularly limited. For example, it can be formed by vapor deposition of an inorganic oxide.

With respect to the prepared first layered body 31, a through hole 32 penetrating in the layering direction is formed by punching, cutting, cutting, laser cutting, or the like (FIG. 4(b)). Thereby, on the first support layer 25 formed with the through holes, "the polarizer 21 with through holes 22 formed in the raw material polarizer 20" and "the polarizer 21 with through holes 52 formed in the structure 58" are formed on the first support layer 25 formed with through holes. The structure of the opening 59". Next, on the side of the structure 59 with openings of the first laminate 31 where the through holes 32 are formed, the second support layer 26 is releasably provided (FIG. 4(c)), and the first support layer 25 Peel off (Figure 4(d)). Thereby, a second laminated body 33 in which the second support layer 26, the structure 59 with openings, and the polarizer 21 with openings are sequentially laminated is obtained (FIG. 4(d)). The second support layer 26 is arranged in a manner of sealing one side of the through hole 52 of the structure 59 with openings.

Next, the through holes 22 of the polarizer 21 with openings and the through holes 52 of the structure 59 with openings of the second layered body 33 are filled with a curable resin composition containing a curable resin (X), and by irradiation The active energy rays harden the curable resin (X) in the through holes 22 and 52. Thereby, the through-hole 22 of the polarizer 21 with the opening and the through-hole 52 of the structure 59 with the opening form a cured product of the curable resin (X), and the first reinforcement is formed on the second support layer 26 The material 50 and the polarizer 10 (FIG. 5(a)). In the polarizer 10 shown in FIG. 5( a ), the area other than the through hole 22 of the polarizer 21 with an opening becomes the polarizing area 11, and the area where the through hole 22 is provided with the hardened substance becomes the non-polarizing area 12. The first reinforcing material 50 shown in FIG. 5(a) is provided on one side of the polarizer 10, and the area other than the through hole 52 of the structure 59 with openings becomes the cell area 55, and is provided with a hardened substance The area of the through hole 52 becomes the non-cell area 56.

Then, a second reinforcing material 60 is formed on the side opposite to the first reinforcing material 50 side of the polarizer 10, and a polarizer composite 40 is formed on the second support layer 26 (FIG. 5(b)). Second reinforcing material 60 For example, the cell wall 63 can be formed by the method described above as the method of forming the cell wall 53 of the structure 58. After the second reinforcing material 60 is formed, the second support layer 26 may also be peeled off.

The method of filling the curable resin composition in the through holes 22 of the polarizer 21 with openings and the through holes 52 of the structure 59 with openings is not particularly limited. For example, a dispenser or a dispenser may be used to inject the curable resin composition into the through holes 22 and 52 of the second laminate 33; it may also be placed on the surface of the polarizer 21 with the opening of the second laminate 33. The curable resin composition is applied on the top, and the curable resin composition is filled in the through holes 22 and 52. The cured layer of the curable resin composition coated on the surface of the polarizer 21 with openings can be used as a protective layer described later. When applying the curable resin composition, the base film can also be provided so as to cover the surface of the coating layer formed by coating. The base film may be peeled after the curable resin (X) is cured.

The first support layer 25 may be a support layer used in the production of the raw material polarizer 20 described later, or the above-mentioned base film used when the curable resin composition is applied. Alternatively, it may be a peelable support layer bonded to the raw material polarizer 20 with a volatile liquid such as water, or it may be a peelable adhesive sheet for the raw material polarizer 20. The second support layer 26 can be a peelable support layer attached to the polarizer 21 with openings by a volatile liquid such as water, or it can be a peelable adhesive for the polarizer 21 with openings sheet.

As described above, in the polarizer composite 40, by setting the thickness of the raw polarizer 20 to be 15 μm or less, the depth of the through hole 22 provided in the polarizer 21 with the aperture can also be 15 μm or less. Since the height of the first cell 51 of the structure 59 with openings is usually 15 μm or less, the depth of the through holes 52 provided in the structure 59 with openings can also be 15 μm or less. Thereby, the filling of the curable resin composition in the through hole 22 of the polarizer 21 with openings and the through hole 52 of the structure 59 with openings, and filling in the through holes 22, can be performed in a short time. The curing treatment of the curable resin (X) contained in the curable resin composition of 52 can suppress the decrease in workability.

In the manufacturing method of the polarizer composite 40, the through hole 32 is formed in the first laminate 31 having the structure 58, the raw polarizer 20, and the first support layer 25 in this order. The raw material polarizer 20 is the area where the non-polarized region 12 of the polarizer 10 is formed, 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, cracks may be generated around the through hole 22 The fear of occurrence of such unfavorable circumstances. In the manufacturing method of the polarizer composite 40, since the structure 58 is provided on the raw polarizer 20, the through holes 22 are formed in a state where the structure 58 reinforces the raw polarizer 20, so that the polarizer 21 with apertures can be prevented from generating Cracks, and the polarizer 10 with the generation of cracks suppressed can be obtained.

(Material Polarizer)

The raw material polarizer 20 is preferably one that is not likely to be significantly deteriorated by the active energy rays irradiated for curing the curable resin (X) filled in the curable resin composition of the through hole 22. Such a raw material polarizer 20 is, for example, a film formed by adsorbing and aligning a dichroic dye on a polyvinyl alcohol-based resin film, or a hardened layer of a polymerizable liquid crystal compound with a dichroic dye aligning, and the manufacturing method is such as The above-mentioned polarized light region 11 is described.

(Structure for forming reinforcement material (structure))

The structure 58 is a structure composed of only the cell region 55 without the non-cell region 56. The structure 58 can be obtained by using a resin material or an inorganic oxide as described above to form a cell partition wall 53 that divides the first cell 51. Examples of materials that can be used as resin materials and inorganic oxides, and methods for forming cell partition walls 53 using these, include the materials and methods exemplified above.

<Optical Laminate>

FIG. 6 is a schematic cross-sectional view schematically showing an example of the optical laminate of this embodiment. The optical laminate 45 shown in FIG. 6 has protective layers 17, 18 on both sides of the polarizer composite 40 shown in FIG. 1(a). The optical layered body 45 may have the protective layer 17 (or 18) only on one side of the polarizer composite body 40. The polarizer composite 40 contained in the optical laminate 45 may also be the polarizer composite 40 shown in FIG. 2(a) or (b). The protective layers 17 and 18 can be provided on the polarizer composite 40 via an adhesive layer or an adhesive layer or other bonding layer. In this case, for example, a film-like protective layer can be laminated on the polarizer composite 40 via a bonding layer. The protective layers 17 and 18 may be provided on the polarizer composite 40 in a direct contact manner without passing through the bonding layer. In this case, the protective layers 17 and 18 can be formed by, for example, coating a composition containing the resin material constituting the protective layers 17 and 18 on the polarizer composite 40 and curing or hardening the coating layer.

When the optical laminated body 45 is one in which the protective layers 18 and 17 are respectively disposed on the first reinforcing material 50 and the second reinforcing material 60 of the polarizer composite 40 through the bonding layer, it is preferable to fill the first reinforcing material The internal space of the first cell 51 of the material 50, 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, etc. In this way, a bonding layer is provided to form the protective layers 18 and 17.

When the optical laminate 45 is one in which the protective layers 18 and 17 are respectively arranged on the first reinforcing material 50 and the second reinforcing material 60 of the polarizer composite 40 in a direct contact manner, it is preferable to bury the first The internal space of the first cell 51 of the reinforcing material 50, 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 The protective layers 18 and 17 are formed by disposing a composition containing the resin material constituting the protective layers 18 and 17 in a manner such as this.

In the optical layered body 45, the protective layers 18 and 17 may be cured layers of the curable resin (X) directly provided on the first reinforcing material 50 and the second reinforcing material 60, respectively. The curable resin (X) constituting the protective layers 18 and 17 belonging to the cured layer may be a resin that is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays, and is not particularly limited. Exemplified by the curable resin (X) described above. The protective layers 18, 17 may be a curable resin composition containing the same curable resin (X) as the curable resin (X) that constitutes the non-polarized region 12 and the non-cellular region 56 of the polarizer 10 The hardened layer.

To manufacture the optical laminate 45, for example, a curable resin composition is applied to the first reinforcing material 50 and the second reinforcing material 60 sides of the polarizer composite 40, and the curable resin (X) is irradiated with active energy rays. hardening. Thereby, the protective layers 18 and 17 belonging to the cured layer of the curable resin (X) can be formed on the first reinforcing material 50 and the second reinforcing material 60, respectively, to obtain the optical layered body 45.

In the optical layered body 45 shown in FIG. 6, one of the protective layers 17 and 18 can be a protective layer provided via a bonding layer, and the other can be a protective layer provided not via a bonding layer. The protective layers 17 and 18 included in the optical laminate 45 may be the same or different from each other.

When coating the curable resin composition, the base film can be provided so as to cover the surface of the coating layer formed by coating. In this case, the base film may be used as the protective layers 17 and 18, and the cured product layer of the curable resin (X) may be used as the bonding layer for bonding the protective layers 17 and 18. The base film may be peeled after the curable resin (X) is cured.

(The protective layer)

The protective layers 17, 18 are preferably light-permeable resin layers, may also be resin films, or may be coating layers formed by coating a composition containing a resin material. The resin used in the resin layer is preferably transparent, A thermoplastic resin with excellent mechanical strength, thermal stability, moisture barrier properties, isotropy, and extensibility. The thermoplastic resin may be, for example, a thermoplastic resin constituting a base film that can be used in the production of the above-mentioned raw material polarizer 20. When the optical laminate 45 has 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 thickness of the protective layers 17 and 18 is generally 200 μm or less, preferably 150 μm or less, more preferably 100 μm or less, and may be 80 μm or less, or may be 60 μm or less. The thickness of the protective layers 17, 18 is usually 5 μm or more, may be 10 μm or more, or may be 20 μm or more. The protective layers 17, 18 may or may not have a phase difference. When the optical laminate 45 has 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.

(Laminated layer)

The bonding layer is an adhesive layer or an adhesive layer. The adhesive used to form the adhesive layer and the adhesive used to form the adhesive layer include, for example, the adhesives and adhesives used to form the above-mentioned filler.

<Laminate with bonding layer for optical display elements>

The polarizer composite 40 shown in FIGS. 1 and 2 and the optical laminate 45 shown in FIG. 6 may further have a bonding layer for an optical display element, and the bonding layer for an optical display element is used for bonding to a liquid crystal display Optical display elements (liquid crystal panels, organic EL elements) of display devices such as devices or organic EL display devices.

In the polarizer composite 40 and the optical laminate 45, when an optical display element bonding layer is provided on the surface of the first reinforcing material 50 or the second reinforcing material 60, the material constituting the optical display element bonding layer can be used As a filling for the first reinforcing material 50 or the second reinforcing material 60 The filling material is simultaneously performed in the internal space of the first cell 51 of the first reinforcing material 50 or the internal space of the second cell 61 of the second reinforcing material 60, and is bonded to the optical display element. Layer formation.

10: Polarizer

11: Polarized area

12: Non-polarized area

22: Through hole

40: Polarizer composite

50: The first reinforcing material

51: first cell

52: Through hole

53,63: cell wall

55: Cell cavity area

56: non-cell area

60: second reinforcing material

62: second cell

Claims (12)

A polarizer composite body is provided with a polarizer, a first reinforcing material provided on one side of the polarizer, and a second reinforcing material provided on the other side of the polarizer, wherein, The aforementioned polarizer has a polarized area with a thickness of 15 μm or less and a non-polarized area surrounded by the aforementioned polarized area when viewed from above, The first reinforcing material has a plurality of first cells with open end surfaces, and each of the open end surfaces is arranged so as to face the surface of the polarizer. The first reinforcing material has a cell region and a non-cell region. The cell region has the first cell and the cell region exists in the region corresponding to the polarization region, and the non-cell region does not exist. The aforementioned first cell and the non-cell region exists in a region corresponding to the aforementioned non-polarized region, The second reinforcing material has a plurality of second cells with open end surfaces, and each of the open end surfaces is arranged so as to face the surface of the polarizer. The aforementioned second cell cavity exists at least in an area corresponding to the aforementioned non-polarized area, The non-polarized region and the non-cellular region contain a cured product of active energy ray curable resin, The hardened substance contained in the non-polarized region is provided in a through hole surrounded by the polarized region in a plan view. The polarizer composite according to claim 1, wherein the thickness of the cured product is the same as the total thickness of the thickness of the polarizing region and the thickness of the cell region. The polarizer composite according to claim 1, wherein the thickness of the cured product is smaller than the total thickness of the thickness of the polarizing region and the thickness of the cell region. The polarizer composite according to claim 1, wherein the thickness of the cured product is greater than the total thickness of the thickness of the polarizing region and the thickness of the cell region. The polarizer composite according to any one of claims 1 to 4, wherein the non-polarized region has light transmittance. The polarizer composite according to any one of claims 1 to 5, 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 composite according to any one of claims 1 to 6, wherein the active energy ray curable resin system contains an epoxy compound. The polarizer composite according to claim 7, wherein the epoxy compound contains an alicyclic epoxy compound. The polarizer composite according to any one of claims 1 to 8, wherein the shapes of the openings of the first cell and the second cell are independently polygonal, circular, or elliptical, respectively . The polarizer composite according to any one of claims 1 to 9, wherein a translucent filler is further provided in the inner space of the first cell. The polarizer composite according to any one of claims 1 to 10, wherein a translucent filler is further provided in the inner space of the second cell. An optical laminate having a protective layer on one side or both sides of the polarizer composite according to any one of claims 1 to 11.

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