TW202116545A - Polarizer, polarizer composite, and optical laminate - Google Patents

Abstract

An object of the present invention is to provide a novel polarizer, a polarizer composite, and an optical laminate. The polarizer has a polarizing region and a non-polarizing region surrounded by the polarizing region in a plan view. A thickness of the polarizing region is 15 [mu]m or less. The non-polarizing region is a region in which a cured product of an active energy ray-curable resin is provided in a through hole surrounded by the polarizing region in a plan view.

Description

Polarizer, polarizer composite and optical laminate

The invention relates to a polarizer, a polarizer composite 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 novel polarizer, a polarizer composite and an optical laminate, which replaces the polarizer formed with regions with low dichroic substance content by chemical treatment such as decolorization.

The present invention provides the following polarizers, polarizer composites, and optical laminates.

[1] A polarizer comprising a polarizing region and a non-polarizing region surrounded by the aforementioned polarizing region when viewed from above, wherein,

The thickness of the aforementioned polarization zone is 15μm or less,

The non-polarized region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the polarized region in a plan view.

[2] The polarizer as described in [1], wherein the thickness of the cured product is the same as the thickness of the polarized region.

[3] The polarizer as described in [1], wherein the thickness of the cured product is smaller than the thickness of the polarized region.

[4] The polarizer as described in [1], wherein the thickness of the cured product is greater than the thickness of the polarized region.

[5] The polarizer according to any one of [1] to [4], wherein the non-polarized region has light transmittance.

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

[8] The polarizer according to [7], wherein the epoxy compound includes an alicyclic epoxy compound.

[9] A polarizer composite having the polarizer described in any one of [1] to [8] and a reinforcing material provided on at least one side of the polarizer, wherein:

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

[10] The polarizer composite as described in [9], wherein the shape of the opening of the cell is polygonal, circular, or elliptical.

[11] The polarizer composite as described in [9] or [10], in which a translucent filler is further provided in the inner space of the aforementioned cell.

[12] An optical laminate comprising at least one of the polarizer described in any one of [1] to [8] or the polarizer composite described in any one of [9] to [11] The surface side has a protective layer.

[13] The optical laminate according to [12], wherein the protective layer is a cured product layer of an active energy ray curable resin provided on the polarizer.

[14] The optical laminate according to [13], wherein the active energy ray curable resin constituting the protective layer has the same activity as the active energy ray curable resin constituting the cured product contained in the non-polarized region Energy ray curable resin.

With the present invention, a novel polarizer, polarizer composite and optical laminate can be provided.

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

31: The first layered body

32: Through hole

33: The second layered body

41: Polarizer composite

42 to 45: Optical laminate

50: Reinforcing material

51: cell cavity

53: Cell wall

Fig. 1(a) is a schematic plan view schematically showing an example of the polarizer of the present invention; Fig. 1(b) to Fig. 1(d) are z-z' cross-sectional views of the polarizer shown in Fig. 1(a).

2(a) and FIG. 2(b) are diagrams schematically showing an example of a cross section around the non-polarized region of the polarizer, and are explanatory diagrams for explaining the method of determining the thickness of the cured material provided in the non-polarized region.

3(a) to 3(e) are schematic cross-sectional views schematically showing an example of the manufacturing method of the polarizer of the present invention.

Fig. 4(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present invention; Fig. 4(b) is a schematic plan view of the reinforcing material side of the polarizer composite shown in Fig. 4(a).

5(a) to 5(c) are schematic cross-sectional views schematically showing an example of the optical laminate of the present invention.

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

Fig. 7 is a schematic cross-sectional view schematically showing still another example of the optical laminate of the present invention.

Fig. 8 is a schematic cross-sectional view schematically showing still another 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 diagrams, adjust appropriately in order to easily understand each component. The scale of site preparation is displayed, and the scale of each component shown in the diagram is not necessarily the same as the scale of the actual component.

<Polarizer>

Fig. 1(a) is a schematic plan view schematically showing an example of the polarizer of this embodiment, and Figs. 1(b) to (d) are z-z' cross-sectional views of the polarizer shown in Fig. 1(a). The polarizer 10 shown in FIGS. 1(a) to (d) has a polarized region 11 and a non-polarized region 12 surrounded by the polarized region 11 in a plan view. The thickness of the polarizing region 11 is 15 μm or less. The non-polarized area 12 is a through hole 22 surrounded by the polarized area 11 in which a cured product of active energy ray curable resin (hereinafter, sometimes referred to as "curable resin (X)") is provided in a plan view. area.

The polarizer 10 is shown in FIG. 1(a), and has a non-polarized region 12 surrounded by a polarized region 11 in a plan view. Therefore, when the polarizer 10 is applied to a display device such as a liquid crystal display device such as a smart phone or a tablet terminal, or an organic EL display device, the camera lens and image are arranged in a manner corresponding to the non-polarized region 12 The printed part of the display or logo can suppress the decrease of the sensitivity of the camera and the decrease of the design.

In the polarizer 10, since a cured product of the curable resin (X) is provided in the through hole 22, the non-polarized region 12 can be made solid. Since the thickness of the polarizer 10 is as thin as 15 μm or less, if the hardening resin (X) is not provided in the non-polarized region 12 and the through hole 22 is hollow, it will be caused when it is applied to a display device, etc. The shrinkage of the polarizer due to the temperature change it withstands may cause defects such as cracks in the periphery of the through hole 22. In contrast, like the polarizer 10, by providing a cured product of the curable resin (X) in the through hole 22, the non-polarized region 12 can be made solid, so that the occurrence of the above-mentioned problems can be suppressed.

The arrangement of the polarizing area 11 and the non-polarizing area 12 in the polarizer 10, if so The polarizing area 11 may be provided in such a way that it surrounds the non-polarizing area 12, and it is not particularly limited. 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 polarizer 10 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 10 are not particularly limited, and can be determined according to the size of the display device to which the polarizer 10 is applied.

(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 the property of absorbing linearly polarized light having a vibrating surface parallel to its absorption axis and transmitting linearly polarized light having a vibrating surface orthogonal to the absorption axis (parallel to the transmission axis), and this property can be mainly achieved by the polarization region 11 and obtained.

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, for example, can be done by immersing a polyvinyl alcohol-based film in an iodine aqueous solution To proceed. 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 manual, sometimes it will be so only by polarized light The polarizing film formed in the area 11 is called 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 single 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 x100

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 the active energy ray curable resin composition containing the curable resin (X) described later in the non-polarized region 12 is likely to decrease. Moreover, when the polarization region 11 is less than the above-mentioned range, it is 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 is It means that the light (transmitted light) transmitted through the non-polarized region 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. 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 more than 85%, more preferably more than 90%, and more Preferably, the transmission is more than 92%. The following definition of "transmittance" and the preferred range of transmittance to visible light are also the same as above.

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. Thereby, when the polarizer 10 is applied to a display device, printing parts such as a camera lens, an icon, or a logo can be arranged corresponding to the non-polarized area 12, thereby suppressing a decrease in camera sensitivity or a decrease in 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 can be The thickness of the polarizing region 11 is the same (FIG. 1(b)), it may be smaller than the thickness of the polarizing region 11 (FIG. 1(c)), or it may be greater than the thickness of the polarizing region 11 (FIG. 1(d)). 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 of the non-polarized light region 12 is determined as follows. First, in the polarizer 10, a first plane including one surface of the polarizing region 11 and a second plane including the other surface are assumed. Next, in the non-polarized region 12, a first position and a second position are determined. The first position is the position where the shortest distance between the surface of the hardened object and the first plane in the above-mentioned one surface side is the largest. The second position is the position when the shortest distance between the surface of the hardened object on the other surface side and the second plane is the largest. Then, the total value (dm+dn+D) of the shortest distance at the first position (dm), the shortest distance at the second position (dn), and the distance (D) between the first plane and the second plane (dm+dn+D) is used as non-polarized light The thickness of the hardened substance in zone 12.

The method of determining the thickness when the thickness of the cured product provided in the non-polarized region 12 is different from the thickness of the polarized region 11 will be specifically explained based on FIG. 2. 2(a) and (b) are diagrams schematically showing an example of a cross section around the non-polarized region of the polarizer, and are explanatory diagrams for explaining the method of determining the thickness of the hardened object provided in the non-polarized region.

When a hardened substance is set on the non-polarized region 12 as shown in Figure 2(a), assume that "a straight line represented by a dashed-dotted line along one surface side of the polarized region 11 to the non-polarized region 12" 11m for the first plane. 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 provided in the non-polarized region 12" becomes the shortest distance (Figure 2( The position where "dm" in a) becomes the largest is regarded as the first position. Next, as shown in FIG. 2(a), "a straight line indicated by a dashed-dotted line along the other surface side of the polarized region 11 and the non-polarized region 12" is assumed as the second plane 11n. Connect "Any point on the second plane 11n" with "Set Placed on any point on the surface of the hardened object in the non-polarized region 12" is the shortest line, and the position where the length of the line ("dn" in Figure 2(a)) becomes the largest is regarded as the first Two positions. Here, as shown in FIG. 2(a), in the thickness direction of the polarizer 10, when the surface of the hardened object provided in the non-polarized region 12 is present on the inner surface side than the first plane 11m and the second plane 11n ( In the case of the polarizer 10 side), dm and dn are displayed 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 shown in FIG. 2(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 as shown in FIG. 2(b), it is also possible to determine the setting in the non-polarized region by assuming the first plane 11m and the second plane 11n in the same manner as described above. The thickness of the cured product of the polarized light zone 12. Specifically, first, among the shortest straight lines connecting "any point on the first plane 11m" and "any point on the surface of the hardened object provided in the non-polarized region 12," The position where the length ("dm" in Figure 2(b)) becomes the largest is regarded as the first position. Next, the length of the straight line 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" becomes the shortest distance (Figure 2 The position when "dn" in (b) becomes the largest is regarded as the second position. Here, as shown in FIG. 2(b), in the thickness direction of the polarizer 10, when the surface of the hardened object provided in the non-polarized region 12 exists on the outer side (polarized light) than the first plane 11m and the second plane 11n On the opposite side of sheet 10), dm and dn are displayed as positive values. In this way, the thickness of the hardened material provided in the non-polarized region 12 shown in FIG. 2(b) can be determined as D+dm+dn (dm and dn are positive values).

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

The non-polarized area 12 in the polarizer 10 is the area where the cured product of the active energy ray curable resin (curable resin (X)) is provided as described above, and is preferably composed of active energy ray-curable resin (curable resin (X)). Energy line It is formed from a curable resin composition (hereinafter, sometimes 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 curable resin (X) can 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. Alicyclic epoxy compounds are epoxidized compounds with more than one epoxy group bonded to the alicyclic ring in the molecule. Things. 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 polarizing region 11 of the polarizer 10 and the cured product of the curable resin (X) forming the non-polarizing region 12 are provided with excellent adhesion, so they can be preferably used. 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 improve the adhesion between the polarized region 11 of the polarizer 10 and the cured product of the curable resin (X) forming the non-polarized region 12, and the curable resin (X) The effect of the hardness and mechanical strength of the cured product, and also makes it easier to adjust the viscosity and curing speed of the curable resin (X). "(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. Examples of the polymerization initiator include cationic polymerization initiators such as photocationic polymerization initiators or radical polymerization initiators. The photocationic polymerization initiator is used by visible light, ultraviolet light, X-ray, electron beam, etc. The irradiation of active energy rays generates cationic species or Lewis acid 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 agents, antistatic agents, leveling agents, etc.

(Method of manufacturing polarizer)

3(a) to (e) are schematic cross-sectional views schematically showing an example of the manufacturing method of the polarizer of this embodiment. Although the polarizer 10 shown in Fig. 1(b) is manufactured in Fig. 3(a) to (e), the polarizer 10 shown in Fig. 1(c) and (d) can also be manufactured by It is manufactured by the method described below. The polarizer 10 can be manufactured using, for example, a "material polarizer 20 having the same visual sensitivity correction polarization (Py) as a whole and without the non-polarizing region 12". 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.

The polarizer 10 can be manufactured by the following steps, for example. First, as shown in FIG. 3( a ), a first laminate 31 with a first support layer 25 is provided on one surface of the raw polarizer 20 and the raw polarizer 20 is peelable. With respect to the prepared first layered body 31, a through hole 32 penetrating in the layering direction is formed by punching, cutting, cutting, or laser cutting (FIG. 3(b)). In this way, the polarizer 21 with openings in which the through holes 22 are formed on the raw polarizer 20 is produced. Next, after the second support layer 26 is releasably provided on the side of the polarizer 21 with openings of the first laminate 31 in which the through holes 32 are formed (FIG. 3(c)), the first support layer 25 Peel off (Figure 3(d)). Thereby, a second laminate 33 in which the second support layer 26 and the polarizer 21 with openings are laminated is obtained (FIG. 3(d)). The second support layer 26 is to seal the polarized light with openings The sheet 21 is arranged on one side of the through hole 52.

Next, the through hole 22 of the polarizer 21 with openings in the second laminate 33 is filled with a curable resin composition containing a curable resin (X), and the curable resin composition in the through hole 22 is irradiated with active energy rays. The resin (X) hardens. Thereby, a cured product of curable resin (X) is formed in the through hole 22 of the polarizer 21 with openings, and the polarizer 10 laminated on the second support layer 26 is obtained (FIG. 3(e)). After the cured product is formed, the second support layer 26 may be peeled off. In the obtained polarizer 10, the region other than the through hole 22 of the polarizer 21 with an opening becomes the polarizing region 11, and the region where the through hole 22 of the hardened material is provided becomes the non-polarizing region 12.

The method of filling the curable resin composition in the through hole 22 of the polarizer 21 with openings is not particularly limited. For example, a dispenser or a dispenser can be used to inject the curable resin composition into the through hole 22 of the polarizer 21 of the second laminated body 33; The surface of the polarizer 21 is coated with a curable resin composition, and the curable resin composition is filled in the through holes 22 of the polarizer 21 with openings. 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 can also be used as a protective layer described later. In this case, the cured product layer of the curable resin (X) can also be used as a bonding layer for bonding the protective layer described later. The base film may be peeled after the curable resin (X) contained in the curable resin composition is cured.

The first support layer 25 may be a support layer used in the production of the raw polarizer 20, 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 may be a peelable adhesive sheet for the raw material polarizer 20. The second support layer 26 can be attached to the hole with a volatile liquid such as water. The peelable support layer of the polarizer 21 may also be an adhesive sheet that is peelable for the polarizer 21 with openings.

As described above, 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 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 curable resin (X) contained in the curable resin composition filled in the through-hole 22 can be performed in a short time. ) Hardening treatment, it can suppress the decrease in workability.

(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 As described in the above-mentioned polarizing region 11.

<Polarizer Complex>

Fig. 4(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of this embodiment, and Fig. 4(b) is a schematic plan view of the reinforcing material side of the polarizer composite. In FIG. 4(b), the non-polarized area 12 of the polarizer 10 is shown in wave lines. The polarizer composite 41 shown in FIG. 4( a) has a polarizer 10 and a reinforcing material 50 provided on one side of the polarizer 10. The reinforcing material 50 may also be provided on both sides of the polarizer 10.

In the polarizer composite body 41, the reinforcing material 50 has a plurality of cavities 51, and the plurality of cavities 51 are arranged in such a way that each opening end surface faces the surface of the polarizer 10. The cell cavity 51 has a hollow columnar (cylindrical) structure surrounded by a cell wall 53 dividing the cell cavity 51, and both ends of the columnar structure in the axial direction are opened to become open end faces.

In the polarizer composite body 41, the reinforcing material 50 is shown in FIG. 4(a), and is preferably arranged in such a way that the cell 51 exists in the region corresponding to the non-polarized region 12 of the polarizer 10 and its periphery It is more preferable to provide the cell 51 on the entire surface of the polarizer 10.

It is recognized that since the polarizer 10 has the non-polarized region 12, it is likely to cause cracks in the periphery of the non-polarized region 12 due to shrinkage of the polarizer 10 accompanying temperature changes when applied to a display device or the like. 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 41, since the reinforcing material 50 is provided on one side of the polarizer 10 as described above, it is possible to suppress the generation of cracks due to temperature changes or impacts, or the deterioration of small cracks. Rift.

The polarizer composite 41 shown in FIG. 4(a) is one having the polarizer 10 and the reinforcing material 50 shown in FIG. 1(b), but it is not limited to this. For example, the polarizer 10 contained in the polarizer composite 41 may also be the polarizer 10 shown in FIG. 1(c) or (d).

The reinforcing material 50 can be applied to a display device and the like together with the polarizer 10. 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 the difference in refractive index between the cell wall 53 and the internal space of the cell 51. Therefore, the inner space of the cell 51 of the reinforcing material 50 in the polarizer composite 41 is preferably provided with a translucent filler. In the reinforcing material 50 of the polarizer composite 41, when a gap is provided between the plurality of cavities 51 as described later, it is preferable that a translucent filler is also provided in the gap.

The filling material that can 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 filling material is preferably a material different from the material constituting the cell wall 53 of the reinforcing material 50, and it is more preferable to contain a resin material. The resin material can be selected from, for example, curable resins such as thermoplastic resins, thermosetting resins, or active energy ray curable resins. One or more of the constituent groups may also be pressure-sensitive adhesives or adhesives.

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, etc. Resin, phenol-based resin, melamine-based resin, etc. as main components.

(Reinforcing material)

The cell 51 of the reinforcing material 50 is as described above, and has a hollow columnar (cylindrical) structure surrounded by the cell wall 53 dividing the cell 51, and both ends of the columnar structure in the axial direction The line becomes the open end surface through the opening. The cell 51 has a first opening end surface arranged on the near side opposite to the polarizer 10 of the polarizer assembly 41, and a second opening end surface arranged on the opposite far side as an opening end surface. The reinforcing material 50 may be arranged such 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 preferable that both the first opening end surface and the second opening end surface are aligned with the polarizer 10 The polarizers 10 are arranged facing each other.

The opening shape of the cell 51 of the reinforcing material 50 is not particularly limited, but a polygonal shape, a circular shape, or an 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 cells 51 of the reinforcing material 50 may be the same or different from each other.

The multiple cavities 51 of the reinforcing material 50 are preferably arranged in a plan view of the opening end surface such that the openings of the cavities 51 are adjacent to each other. When a plurality of cells 51 are viewed in a plan view of the opening end surface, for example, as shown in FIG. 4(b), the opening shape of the cell 51 is hexagonal, etc., so that the cells 51 are arranged without gaps. arrangement. Alternatively, when the plurality of cavities 51 are viewed in a plan view of the open end surface, as in the case where the opening shape of the cell 51 is circular, etc., a part of the cell wall 53 of the plurality of cavities 51 may be in contact with each other. The individual cavities 51 are arranged with gaps between them.

Preferably, the reinforcing material 50 is, for example, as shown in FIG. 4(b), the opening shape at any one of the first opening end surface and the second opening end surface is hexagonal, and is in the plane direction of the polarizer composite body 41, have A honeycomb structure in which a plurality of cells are arranged such that the openings are arranged adjacent to each other without gaps.

The size of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, but it is preferable to have a diameter smaller than the diameter of the non-polarized light region 12. The diameter of the cell cavity 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 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 cell 51 of the reinforcing material 50 (the length in the direction orthogonal to the open end surface of the 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, It is usually 15 μm or less, may be 13 μm or less, or may be 10 μm or less.

The cell wall 53 of the reinforcing material 50 that divides the cell 51 is preferably light-transmissive.

The line width of the cell wall 53 of the reinforcing material 50 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 wall 53 of the reinforcing material 50 may 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 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.

When the reinforcing materials 50 are provided on both sides of the polarizer 10, the two reinforcing materials 50 may be the same (the shape and size of the cell 51 are the same), or may be different from each other. The openings of the cavities 51 of the two reinforcing materials 50 provided on both sides of the polarizer 10 may be arranged to overlap each other in a plan view, but are preferably arranged to be staggered in a plan view.

(Method of manufacturing polarizer composite)

The polarizer composite 41 shown in FIG. 4(a) can be manufactured by forming a reinforcing material 50 on the polarizer 10. The reinforcing material 50 can be made, for example, by using a resin material or an inorganic oxide to form a cell wall 53 that divides the cell 51 on the surface of the polarizer 10.

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.

When the reinforcing material 50 of the polarizer composite 41 has a filler, the reinforcing material 50 formed on the polarizer 10 can be filled with the material constituting the filler in the inner space of the cell 51 or the gap between the cells 51. The material constituting the filling material can be filled by coating on the reinforcing material 50, for example. Alternatively, when an adhesive is used as the material constituting the filler, the adhesive sheet provided with an adhesive layer on the release film may be attached to fill the adhesive.

<Optical Laminate>

5 to 8 are schematic cross-sectional views schematically showing an example of the optical laminate of this embodiment. The optical laminate is one having a protective layer on one side or both sides of the polarizer 10 shown in Figs. 1(b) to (d) and the polarizer composite 41 shown in Fig. 4(a).

(Optical laminate (1))

The optical laminate 42 shown in Figs. 5(a) to (c) has the polarizer 10 shown in any one of Figs. 1(b) to (d), and a polarizer 10 provided on one side of the polarizer 10 Protective layer 17. The protective layer 17 is a cured layer of the curable resin (X) directly disposed on the polarizer 10. The curable resin (X) constituting the protective layer 17 belonging to the cured layer may be a resin that is cured by irradiation of active energy rays such as ultraviolet rays, visible light, electron beams, X-rays, etc., and is not particularly limited, and examples can be given. Curable resin (X) as explained above. The protective layer 17 is preferably a cured product layer containing a curable resin composition of the same curable resin (X) as the curable resin (X) included in the non-polarized region 12 of the polarizer 10.

When the protective layer 17 is a cured layer of a curable resin (X) that is the same as the curable resin (X) constituting the cured material of the polarizer 10, the protective layer 17 preferably covers at least the non-polarized region 12 of the polarizer 10 . The protective layer 17 only needs to cover at least a part of one side of the polarizer 10, but preferably covers the entire surface of one side of the polarizer 10.

In order to manufacture the optical layered body 42, for example, a curable resin composition is applied to one side of the polarizer 10, and the curable resin (X) contained in the curable resin composition is cured by irradiation with active energy rays. Thereby, the protective layer 17 belonging to the cured layer of the curable resin (X) can be formed on the polarizer 10 to obtain the optical laminate 42.

Or, firstly, a curable resin composition is applied to the surface of the polarizer 21 with openings in the second laminate 33 (FIG. 3(d)), thereby forming the through holes 22 of the polarizer 21 with openings. The curable resin composition is filled, and a coating layer of the curable resin composition is also formed on the surface of the polarizer 21 with openings. Afterwards, the curable resin (X) contained in the curable resin composition inside and on the surface of the through-hole 22 of the polarizer 21 with openings can be cured by the irradiation of active energy rays to form a cured product and belong to the cured product The protective layer 17 is formed to obtain an optical laminate 42. In this case, the cured product contained in the non-polarized region 12 can be integrated with the cured product layer constituting the protective layer 17, and the curable resin (X) constituting the protective layer 17 can be set to The curable resin (X) that constitutes the curable material contained in the non-polarized region 12 is the same as the curable resin (X).

In order to manufacture the optical laminate 42 shown in Figs. 5(b) and (c), when the protective layer 17 belonging to the hardened layer is provided on the polarizer 10 shown in Figs. 1(c) and (d), it can be filled The protective layer 17 is provided in a way that the thickness of the polarized area 11 and the non-polarized area 12 of the polarizer 10 is different. Specifically, when the optical laminate 42 shown in FIG. 5(b) is to be produced, the thickness of the non-polarized region 12 of the polarizer 10 shown in FIG. 1(c) is smaller than the thickness of the polarized region 11 (The surface side on the upper side of FIG. 1(c)) The protective layer 17 may be provided by coating the curable resin (X) so as to fill up the difference in thickness and cover the surface of the polarization region 11. When the optical layered body 42 shown in FIG. 5(c) is to be produced, the non-polarized area 12 of the polarizer 10 shown in FIG. 1(d) may protrude from the surface of the polarized area 11 (FIG. 1(d) The upper surface side), the protective layer 17 is provided by applying a curable resin composition so as to fill the thickness difference and cover the surfaces of both the polarized region 11 and the non-polarized region 12. In the optical laminate 42 shown in FIG. 5(c), although the protective layer 17 is also provided on the surface of the non-polarized region 12, it can also be provided so as not to cover the surface of the non-polarized region 12 and only the surface of the polarized region 11 Protective layer 17.

When coating the curable resin composition, the base film can also be provided so as to cover the surface of the coating layer formed by coating. In this case, the base film can be used as the protective layer 17 and the cured product layer of the curable resin (X) can be used as a bonding layer for bonding the protective layer 17 to the polarizer 10. The base film may be peeled after the curable resin (X) is cured.

(Optical laminate (2))

FIG. 6 is a schematic cross-sectional view schematically showing another example of the optical laminate of this embodiment. The optical laminate 43 shown in FIG. 6 has: an optical laminate 42 having a protective layer 17 of a cured material layer of curable resin (X) on one side of the polarizer 10 (FIG. 5(a)), and an optical laminate 42 (FIG. 5(a)) provided on one side of the polarizer 10 The reinforcing material 50 on the polarizer 10 side of the optical layered body 42. The reinforcing material 50 may also be provided on the protective layer 17 side of the optical laminate 42 shown in FIG. 5(a).

The reinforcing material 50 is the same as that described in the above-mentioned polarizer composite 41. The optical laminate 43 shown in FIG. 6 can be produced, for example, by forming the reinforcing material 50 in the above-mentioned method due to the optical laminate 42 shown in FIG. 5(a). Alternatively, the optical layered body 43 can also be produced by forming the reinforcing material 50 by the above-mentioned method due to the polarizer 10 shown in FIGS. 1(b) to (d), and then forming the protective layer 17 by the above-mentioned method.

(Optical laminate (3))

The optical laminate 44 shown in FIG. 7 has protective layers 17, 18 on both sides of the polarizer 10 shown in FIG. 1(b). The optical layered body 44 may have the protective layer 17 (or 18) only on one side of the polarizer 10. The polarizer 10 contained in the optical laminate 44 may also be the polarizer 10 shown in FIG. 1(c) or (d). The protective layers 17 and 18 can be provided on the polarizer 10 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 10 via a bonding layer. The protective layers 17 and 18 may be provided on the polarizer 10 in a direct contact manner without passing through the bonding layer. In this case, for example, the protective layers 17 and 18 can be formed by coating a composition containing a resin material constituting the protective layers 17 and 18 on the polarizer 10 and curing or hardening the coating layer. Regarding the protective layers 17 and 18, one may be a protective layer provided through the bonding layer, and the other may be a protective layer provided not through the bonding layer. The protective layers 17 and 18 included in the optical laminate 44 may be the same or different from each other.

When the optical laminate 44 is the polarizer 10 shown in FIG. 1(c) or (d) and the protective layers 17, 18 are provided via the bonding layer, it is preferable to fill the polarizing region 11 and the polarizer 10 of the polarizer 10 The bonding layer is provided in a way that the thickness of the non-polarized region 12 is different, and the protective layers 17 and 18 are provided. When the optical layered body 44 is directly connected to the polarizer 10 shown in FIG. 1(c) or (d) with the protective layers 17, 18, it is preferable to fill the polarizing area 11 of the polarizer 10 The composition containing the resin material constituting the protective layers 17 and 18 is provided so as to be different from the thickness of the non-polarized region 12 to form the protective layers 17 and 18.

(Optical laminate (4))

The optical laminate 45 shown in FIG. 8 has protective layers 17, 18 on both sides of the polarizer composite 41 shown in FIG. 4(a). The optical layered body 45 may have the protective layer 17 (or 18) only on one side of the polarizer composite body 41. The protective layers 17 and 18 can be provided on the polarizer composite 41 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 41 via a bonding layer. The protective layer 18 provided on the side of the reinforcing material 50 of the polarizer composite body 41, for example, is provided with a bonding layer in such a way as to fill in the internal space of the cell 51 of the strong material 50 and the gaps between the plurality of cells 51, and Just build up a protective layer. Alternatively, it is also possible to form a laminated sheet with a coating layer that will become the material of the bonding layer on one side of the film-like protective layer, and laminate it on the reinforcing material 50, thereby forming the inner space of the cell 51 of the reinforcing material 50 , And the filling of the gaps between the plurality of cells 51 will become the material of the bonding layer to form the protective layer. In addition, in FIG. 8, although the case where a reinforcing material is provided on one side of the polarizer 10 is shown, the reinforcing material 50 may be provided on both sides of the polarizer 10.

The protective layers 17 and 18 may be provided on the polarizer composite 41 in direct contact without passing through the bonding layer. The protective layer 17 provided on the polarizer 10 side of the polarizer composite 41 can be, for example, coated on the polarizer 10 of the polarizer composite 41 by coating a composition containing a resin material constituting the protective layer 17 on the polarizer 10 of the polarizer composite 41. The layer is formed by curing or hardening. The protective layer 18 provided on the side of the reinforcing material 50 of the polarizer composite 41 can be formed by embedding and filling the internal space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51, for example. The composition of the resin material of the protective layer 18 is filled to form the protective layer 18.

Regarding the protective layers 17 and 18, one may be used as a protective layer provided through the bonding layer, and the other may be used as a protective layer provided not through the bonding layer. The protective layers 17 and 18 included in the optical laminate 44 may be the same or different from each other.

(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 a thermoplastic resin excellent in transparency, 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 laminates 42 to 45 have 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 laminates 45 and 46 have 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 10 shown in Fig. 1(b) to (d), the polarizer composite 41 shown in Fig. 4(a), and the optical laminates 42 to 45 shown in Figs. 5 to 8 may further have optical display elements With the bonding layer, the bonding layer for the optical display element is used to bond the optical display element (liquid crystal panel, organic EL element) of a display device such as a liquid crystal display device or an organic EL display device.

In the polarizer 10, the polarizer composite 41, and the optical laminates 42 to 45, as in the polarizer 10 shown in FIG. 1(c) or (d), it is located between the polarizing area 11 and the non-polarizing area 12 When the bonding layer for an optical display element is provided on the surface where the thickness difference has occurred, it is preferably provided to fill the thickness difference Bonding layer for optical display elements.

In the polarizer composite 41 and the optical laminates 43 and 45, when the bonding layer for the optical display element is provided on the surface of the reinforcing material 50, the material constituting the bonding layer for the optical display element can be used as the material provided on the reinforcing material 50 The filling material is simultaneously filled with the filling material in the internal space of the cell 51 of the reinforcing material 50 and the formation of the bonding layer for the optical display element.

10: Polarizer

11: Polarized area

12: Non-polarized area

22: Through hole

Claims (14)

A polarizer, which is provided with a polarized area and a non-polarized area surrounded by the aforementioned polarized area when viewed from above, wherein: The thickness of the aforementioned polarization zone is 15μm or less, The non-polarized region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the polarized region in a plan view. The polarizer according to claim 1, wherein the thickness of the cured product is the same as the thickness of the polarized region. The polarizer according to claim 1, wherein the thickness of the cured product is smaller than the thickness of the polarized region. The polarizer according to claim 1, wherein the thickness of the cured product is greater than the thickness of the polarized region. The polarizer according to any one of claims 1 to 4, wherein the non-polarized region has light transmittance. The polarizer 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 according to any one of claims 1 to 6, wherein the active energy ray curable resin system contains an epoxy compound. The polarizer according to claim 7, wherein the epoxy compound contains an alicyclic epoxy compound. A polarizer composite having the polarizer according to any one of claims 1 to 8 and a reinforcing material provided on at least one side of the aforementioned polarizer, wherein: The aforementioned reinforcing material has a plurality of cavities, and each opening end surface of the plurality of cavities is arranged in a manner facing the surface of the aforementioned polarizer. The polarizer composite according to claim 9, wherein the shape of the opening of the cell cavity is polygonal, circular, or elliptical. The polarizer composite according to claim 9 or 10, wherein a translucent filler is further provided in the inner space of the aforementioned cell. An optical laminate having a protective layer on at least one side of the polarizer according to any one of claims 1 to 8, or the polarizer composite according to any one of claims 9 to 11. The optical laminate according to claim 12, wherein the protective layer is a cured product layer of an active energy ray curable resin provided on the polarizer. The optical laminate according to claim 13, wherein the active energy ray curable resin constituting the protective layer has the same active energy ray curable resin as the active energy ray curable resin constituting the cured product contained in the polarizing region Resin.

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