KR20220086575A - Polarizers, polarizer composites and optical laminates - Google Patents

Abstract

A polarizer has a polarization area|region and the non-polarization area|region surrounded by the polarization area|region in planar view. The thickness of the polarization region is 15 μm or less. A non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole surrounded by the polarization area|region in planar view.

Description

Polarizers, polarizer composites and optical laminates

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

A polarizer is widely used as a polarized light supply element in display apparatuses, such as a liquid crystal display device and an organic electroluminescent (EL) display device, and also as a polarized light detection element. A display device with a polarizer is also developed in mobile devices such as notebook personal computers and mobile phones, and polarizers having regions with different transmittance are required from the demands for diversification of display purposes, clarification of display divisions, decoration, etc. is becoming In particular, in small and medium-sized portable terminals typified by smartphones and tablet-type terminals, a polarizer may be bonded to the entire surface of the display surface in order to have a design without borders over the entire surface from the viewpoint of decorativeness. In this case, since the polarizer may be overlapped also in the area of the camera lens and the area of the icon or logo printed under the screen, there is a problem that the sensitivity of the camera is deteriorated or the designability is deteriorated.

For example, in Patent Document 1, a dichroic substance low concentration part having a relatively low content of a dichroic substance is partially provided in a polarizer included in a polarizing plate, and the camera is arranged in correspondence with this dichroic substance low concentration part. It is described to avoid adverse effects.

Patent Document 1: Japanese Patent Laid-Open No. 2015-215609

In patent document 1, the resin film is partially decolorized and the dichroic substance low concentration part is formed by performing the chemical process of making a basic solution contact the resin film containing a dichroic substance. In order to process the basic solution used for decolorization as a waste liquid, time and cost are needed. Moreover, it is described in patent document 1 that content of an iodine can be reduced and a dichroic substance low concentration part can be formed by making a basic solution contact when iodine as a dichroic substance is used. However, when a dichroic substance other than iodine is used, there is no disclosure regarding a specific method of forming the dichroic substance low concentration portion.

An object of this invention is to provide a novel polarizer, a polarizer composite, and an optical laminated body instead of the polarizer which formed the area|region with little content of a dichroic substance by chemical treatment, such as discoloration.

This invention provides the following polarizers, a polarizer composite, and an optical laminated body.

[1] a polarization region and a non-polarization region surrounded by the polarization region in plan view, wherein the polarization region has a thickness of 15 μm or less;

The said non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole enclosed by the said polarization area|region in planar view, The polarizer.

[2] The polarizer according to [1], wherein the thickness of the cured product is the same as the thickness of the polarization region.

[3] The polarizer according to [1], wherein the thickness of the cured product is smaller than the thickness of the polarization region.

[4] The polarizer according to [1], wherein the thickness of the cured product is larger than the thickness of the polarization region.

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

[6] The polarizer according to any one of [1] to [5], wherein the non-polarization region has a diameter in a plan view of 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 contains an epoxy compound.

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

[9] A polarizer composite comprising the polarizer according to any one of [1] to [8] and a reinforcing material provided on at least one surface side of the polarizer,

The reinforcing material is a polarizer composite having a plurality of cells arranged so that each of the opening end faces faces the face of the polarizer.

[10] The polarizer composite according to [9], wherein the shape of the opening of the cell is a polygonal shape, a circular shape, or an elliptical shape.

[11] The polarizer composite according to [9] or [10], wherein a light-transmitting filler is further provided in the inner space of the cell.

[12] An optical laminate having a protective layer on at least one side of the polarizer according to any one of [1] to [8] or the polarizer composite according to any one of [9] to [11].

[13] The optical laminate according to [12], wherein the protective layer is a layer of a cured product 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 is the same active energy ray-curable resin as the active energy ray-curable resin constituting the cured product contained in the polarization region.

ADVANTAGE OF THE INVENTION According to this invention, a novel polarizer, a polarizer composite, and an optical laminated body can be provided.

Fig. 1 (a) is a schematic plan view schematically showing an example of the polarizer of the present invention, and (b) to (d) are zz' cross-sectional views of the polarizer shown in (a).
Fig.2 (a) and (b) is a figure which shows typically an example of the cross section around the non-polarization area|region of a polarizer, It is explanatory drawing for demonstrating the method of determining the thickness of the hardened|cured material provided in the non-polarization area. .
3(a)-(e) are schematic cross-sectional views which show typically an example of the manufacturing method of the polarizer of this invention.
Fig. 4 (a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present invention, and (b) is a schematic plan view of the polarizer composite shown in (a) on the reinforcing material side.
5A to 5C are schematic cross-sectional views schematically showing an example of the optical laminate of the present invention.
It is a schematic sectional drawing which shows typically another example of the optical laminated body of this invention.
It is a schematic sectional drawing which shows typically still another example of the optical laminated body of this invention.
It is a schematic sectional drawing which shows typically still another example of the optical laminated body of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, preferable embodiment of the polarizer of this invention, a polarizer composite, and an optical laminated body is demonstrated. In all the drawings below, the scales are appropriately adjusted to facilitate understanding of each component, and the scale of each component shown in the drawings and the scale of the actual component do not necessarily coincide.

<Polarizer>

Fig. 1 (a) is a schematic plan view schematically showing an example of the polarizer of the present embodiment, and Figs. 1 (b) to (d) are z-z' of the polarizer shown in Fig. 1 (a). It is a cross section. The polarizer 10 shown in FIGS. The thickness of the polarization region 11 is 15 μm or less. The non-polarization region 12 is a cured product of an active energy ray-curable resin (hereinafter, sometimes referred to as “curable resin (X)”) in the through hole 22 surrounded by the polarization region 11 in plan view. This is an established area.

In the polarizer 10, as shown to Fig.1 (a), it has the non-polarization area|region 12 surrounded by the polarization area|region 11 in planar view. Therefore, when applying the polarizer 10 to display apparatuses, such as a liquid crystal display device and an organic electroluminescent display developed in a smartphone or tablet type terminal, etc., it makes it correspond to the non-polarization area|region 12, and a camera lens, an icon, or a logo By arrange|positioning the printing part of a back, the fall of the sensitivity of a camera, and the fall of designability can be suppressed.

In the polarizer 10, since the hardened|cured material of curable resin X is provided in the through-hole 22, the inside of the non-polarization area|region 12 can be filled. Since the polarizer 10 is as thin as 15 µm or less in thickness, if the cured product of the curable resin (X) is not provided in the non-polarization region 12 and the through hole 22 is hollow, when applied to a display device There is a fear that a problem such as cracks occurring in the periphery of the through hole 22 may occur due to the shrinkage of the polarizer according to the temperature change exposed to the back. On the other hand, like the polarizer 10, since the inside of the non-polarization area|region 12 can be filled by providing the hardened|cured material of curable resin X in the through-hole 22, generation|occurrence|production of the said problem is suppressed can do.

Arrangement of the polarization area|region 11 and the non-polarization area|region 12 in the polarizer 10 will not be specifically limited if the polarization area|region 11 is provided so that the non-polarization area|region 12 may be enclosed. The planar view of the polarizer 10 WHEREIN: It is preferable that the total area occupied by the polarization area|region 11 is larger than the total area which the non-polarization area|region 12 occupies. The polarizer 10 should just have one non-polarization area|region 12, and may have the non-polarization area|region 12 two or more. When it has two or more non-polarization areas|regions 12, the shape of each non-polarization area|region 12 may mutually be mutually same, and may differ from each other.

The polarizer 10 may be a sheet body, or an elongate body having a length to be wound into a roll shape at the time of storage or transport, etc. may be sufficient as it. The planar shape and size of the polarizer 10 are not particularly limited, and are determined according to the size of the display device to which the polarizer 10 is applied.

(polarization area)

The polarization region 11 of the polarizer 10 preferably exhibits absorption dichroism in the wavelength range of 380 nm to 780 nm. The polarizer 10 has a property of absorbing linearly polarized light having an oscillation plane parallel to the absorption axis and transmitting linearly polarized light having an oscillation plane perpendicular to the absorption axis (parallel to the transmission axis), and this property is mainly polarized light It can be obtained by area (11).

The polarization region 11 is, for example, in a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene/vinyl acetate copolymer-based partially saponified film, and a dichroic substance such as iodine or a dichroic dye. This adsorption/orientation; What the dichroic substance adsorbed and orientated to what orientated the polyene-type orientation film or liquid crystal compound, such as a dehydration-processed material of polyvinyl alcohol, and a dehydrochloric acid-treated product of polyvinyl chloride; etc. can be used. Especially, it is preferable to use the thing obtained by dyeing a polyvinyl alcohol-type film with iodine and uniaxially stretching as a thing excellent in an optical characteristic.

First, about the thing obtained by dyeing|staining the polyvinyl alcohol-type film used as the preferable polarization area|region 11 with iodine and uniaxial stretching, the manufacturing method is demonstrated briefly.

Dyeing with iodine is performed by, for example, immersing a polyvinyl alcohol-based film in an aqueous iodine solution. It is preferable that the draw ratio of uniaxial stretching is 3 to 7 times. Extending|stretching may be performed after dyeing process, and may be performed while dyeing|staining. Moreover, you may dye|dye after extending|stretching.

A swelling process, a crosslinking process, a washing process, a drying process, etc. are performed to a polyvinyl alcohol-type film as needed. For example, by immersing the polyvinyl alcohol-based film in water and washing with water before dyeing, it is possible to not only wash the surface of the polyvinyl alcohol-based film from contamination and anti-blocking agent, but also to swell the polyvinyl alcohol-based film to prevent dyeing unevenness, etc. can do.

Stretching treatment, dyeing treatment, crosslinking treatment (boric acid treatment), water washing treatment, and drying treatment of the polyvinyl alcohol-based resin film may be performed according to, for example, the method described in Japanese Patent Application Laid-Open No. 2012-159778. In the method described in this document, the polyvinyl alcohol-type resin layer used as the polarization area|region 11 is formed by coating of the polyvinyl alcohol-type resin with respect to a base film. At this time, the used base film can also be used as the 1st support layer 25 mentioned later.

Then, the polarization|polarized-light area|region 11 which the dichroic dye was adsorb|sucked and orientated to what orientated the liquid crystal compound is demonstrated briefly. As the polarization region 11 in this case, for example, Japanese Patent Application Laid-Open No. 2013-37353, Japanese Patent Application Laid-Open No. 2013-33249, Japanese Patent Application Laid-Open No. 2016-170368, and Japanese Patent Application Laid-Open No. 2017-83843 As described in publications, etc., in the cured film in which the liquid crystal compound superposed|polymerized, you may use what the dichroic dye orientated. As a dichroic dye, what has absorption within the range of wavelength 380-800 nm can be used, and it is preferable to use organic dye. As a dichroic dye, an azo compound is mentioned, for example. A liquid crystal compound is a liquid crystal compound which can superpose|polymerize with orientation, and can have a polymeric group in a molecule|numerator. The cured film which this liquid crystal compound superposed|polymerized may be formed on the base film, and in that case, the said base film can also be used as the 1st support layer 25 mentioned later.

After producing the polarizing film used for the polarization area|region 11 as mentioned above, it is also preferable to form the non-polarization area|region 12 by hole processing, and to form the polarizer 10. In this specification, the polarizing film formed only with such a polarization area|region 11 may be called the raw material polarizer 20.

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

The single transmittance (Ts) is the Y value which measured based on the 2 degree field of view (C light source) of JIS Z8701, and performed the visibility correction|amendment. Visibility correction polarization degree (Py) can be measured using, for example, an ultraviolet and visible spectrophotometer (manufactured by Nippon Bunko Co., Ltd., product name: V7100), and based on the parallel transmittance Tp and the orthogonal transmittance Tc subjected to the visibility correction, the following is obtained by the formula

Py[%]={(Tp-Tc)/(Tp+Tc)} ^1/2 × 100

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

(non-polarization area)

Generally, "non-polarization" refers to light having no observable regularity in an electric field component. In other words, unpolarized light is random light in which a specific dominant polarization state is not observed. In addition, "partially polarized light" refers to light in an intermediate state between polarized light and unpolarized light, and refers to light in which at least one of linearly polarized light, circularly polarized light, and elliptically polarized light and unpolarized light are mixed. The non-polarization area|region 12 in the polarizer 10 means that the light (transmission light) which permeate|transmits the said non-polarization area|region 12 becomes non-polarization|polarized-light or partially polarized light. In particular, a non-polarization region in which transmitted light is non-polarization is preferable.

The non-polarization region 12 of the polarizer 10 is a region surrounded by the polarization region 11 in plan view.

The non-polarization area|region 12 contains the hardened|cured material of curable resin (X). The non-polarization region 12 is a through hole provided in the polarizer (raw material polarizer 20) formed only in the polarization region 11. A cured product of an active energy ray-curable resin composition containing a curable resin (X) described later is provided. it is preferable The non-polarization region 12 has light-transmitting properties. In the present specification, light transmittance refers to a property (transmittance) that transmits 80% or more of visible light in a wavelength range of 400 nm to 700 nm, preferably transmits 85% or more, more preferably transmits 90% or more, 92 % or more is more preferable. The definition of "transmittance" below and the preferable range of the transmittance|permeability with respect to visible light are also the same as above.

When the non-polarization area|region 12 of the polarizer 10 has translucency, optical transparency can be ensured in the non-polarization area|region 12. Thereby, when applying the polarizer 10 to a display device, by making it correspond to the non-polarization area|region 12, and arranging printing parts, such as a camera lens, an icon, or a logo, the fall of the sensitivity of a camera, and a fall of designability. can suppress.

Although the planar shape of the non-polarization area|region 12 is not specifically limited, Circle; oval; Jang Won-Hyeong; polygons such as triangles or squares; At least one corner of the polygon is rounded (a shape having R), and may be a rounded polygon or the like.

It is preferable that the diameter of the non-polarization area|region 12 is 0.5 mm or more, 1 mm or more may be sufficient as it, 2 mm or more may be sufficient as it, and 3 mm or more may be sufficient as it. It is preferable that the diameter of the non-polarization area|region 12 is 20 mm or less, 15 mm or less may be sufficient as it, 10 mm or less may be sufficient as it, and 7 mm or less may be sufficient as it. The diameter of the non-polarization area|region 12 means the length in the longest straight line among the straight lines which connect arbitrary two points of the outer periphery of the said non-polarization area|region 12.

The thickness of the cured product of the curable resin (X) provided in the non-polarization region 12 may be the same as the thickness of the polarization region 11 (FIG. 1(b)), or may be smaller than the thickness of the polarization region 11 ( It may be larger than the thickness of the polarization area|region 11 in FIG.1(c)) (FIG.1(d)). It is preferable that the hardened|cured material of curable resin (X) provided in the non-polarization area|region 12 may be provided so that the through hole 22 whole may be filled.

The thickness of the hardened|cured material of the non-polarization area|region 12 is determined as follows. First, in the polarizer 10 , a first plane including one surface of the polarization region 11 and a second plane including the other surface are assumed. Next, in the non-polarization region 12, the first position is a position where the shortest distance between the surface of the cured product on the one surface side and the first plane is the largest, and the surface and the second surface of the cured product on the other surface side A second position, which is a position at which the shortest distance formed by the plane becomes the maximum, is determined. Then, the sum of the shortest distance (dm) from the first position, the shortest distance (dn) from the second position, and the distance (D) between the first plane and the second plane (dm+dn+D) , let it be the thickness of the hardened|cured material of the non-polarization area|region 12.

The thickness determination method in case the thickness of the hardened|cured material provided in the non-polarization area|region 12 and the thickness of the polarization area|region 11 differ is demonstrated concretely based on FIG. Fig.2 (a) and (b) is a figure which shows typically an example of the cross section around the non-polarization area|region of a polarizer, It is explanatory drawing for demonstrating the method of determining the thickness of the hardened|cured material provided in the non-polarization area. .

As shown in FIG.2(a), when the hardened|cured material is provided in the non-polarization area|region 12, the straight line shown by the dashed-dotted line in the non-polarization area|region 12 along one surface side of the polarization area|region 11. is assumed to be the first plane 11m. Among the straight lines in which the straight line connecting any point on the first plane 11m and any point on the surface of the cured product provided in the non-polarization region 12 is the shortest distance, the length of the straight line (Fig. 2(a)) The position when "dm") in ) becomes the maximum is made into a 1st position. Next, as shown in Fig. 2A, a straight line indicated by a dashed-dotted line in the non-polarization region 12 along the other surface side of the polarization region 11 is assumed to be the second plane 11n. do. Among the straight lines connecting any point on the second plane 11n and any point on the surface of the cured product provided in the non-polarization region 12 to the shortest distance, the length of the straight line (Fig. 2(a)) The position at which "dn") in ) becomes the maximum is set as the second position. Here, as shown to Fig.2 (a), the surface of the hardened|cured material provided in the non-polarization area|region 12 is the thickness direction of the polarizer 10. WHEREIN: 1st plane 11m and 2nd plane 11n ), when present on the inner surface side (polarizer 10 side), dm and dn shall be expressed as negative values. In addition, let D be the distance between the 1st plane 11m and the 2nd plane 11n. Then, the thickness of the hardened|cured material provided in the non-polarization area|region 12 shown to Fig.2 (a) can be determined as D+dm+dn (dm and dn are negative values).

Moreover, as shown in FIG.2(b), also about the case where the hardened|cured material is provided in the non-polarization area|region 12, similarly to the above, by assuming the 1st plane 11m and the 2nd plane 11n , the thickness of the cured product provided in the non-polarization region 12 can be determined. Specifically, first, among the straight lines connecting any point on the first plane 11m and any point on the surface of the cured product provided in the non-polarization region 12 to the shortest distance, the length of the straight line ( Let the position at the time of "dm") in FIG.2(b) become the 1st position. Next, among the straight lines connecting any point on the second plane 11n and any point on the surface of the cured product provided in the non-polarization region 12 to the shortest distance, the length of the straight line (in FIG. 2 ) The position when "dn") in (b) becomes the maximum is made into a 2nd position.

Here, as shown in FIG.2(b), the surface of the hardened|cured material provided in the non-polarization area|region 12 is the thickness direction of the polarizer 10. WHEREIN: 1st plane 11m and 2nd plane 11n ), dm and dn shall be expressed as positive values when present on the outer surface side (the side opposite to the polarizer 10). Then, the thickness of the hardened|cured material provided in the non-polarization area|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))

As described above, the non-polarization region 12 in the polarizer 10 is a region in which a cured product of an active energy ray-curable resin (curable resin (X)) is provided, and preferably contains the curable resin (X). It is formed of an active energy ray-curable resin composition (henceforth "curable resin composition" may be called). Curable resin (X) contained in curable resin composition hardens|cures by irradiation of active energy rays, such as an ultraviolet-ray, a visible light, an electron beam, and X-ray. It is preferable that curable resin (X) is ultraviolet curable resin hardened|cured by irradiation of an ultraviolet-ray. An active energy ray hardening-type adhesive agent may be sufficient as curable resin composition containing curable resin (X), and in this case, it is more preferable that it is an ultraviolet curable adhesive agent.

It is preferable that curable resin composition is a solvent-free type. The solvent-free type means that no solvent is actively added, and specifically, the solvent-free type curable resin composition has a solvent content of 5 weight percent with respect to 100 weight % of the curable resin (X) contained in the curable resin composition. % or less.

It is preferable that curable resin (X) contains an epoxy compound. An epoxy compound is one or more in a molecule|numerator, Preferably it is a compound which has two or more epoxy groups. As an epoxy compound, an alicyclic epoxy compound, an aliphatic epoxy compound, a hydrogenated epoxy compound (glycidyl ether of the polyol which has an alicyclic ring), etc. are mentioned. One type may be sufficient as the epoxy compound contained in curable resin (X), and 2 or more types may be sufficient as it.

It is preferable that content of an epoxy compound is 40 weight% or more with respect to 100 weight% of curable resin (X), It is more preferable that it is 50 weight% or more, It is still more preferable that it is 60 weight% or more. Content of the epoxy compound may be 100 weight% or less with respect to 100 weight% of curable resin (X), 90 weight% or less may be sufficient, Furthermore, 80 weight% or less may be sufficient and 75 weight% or less may be sufficient as it.

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

It is preferable that the epoxy compound contained in curable resin (X) contains an alicyclic epoxy compound. An alicyclic epoxy compound is an epoxy compound which has one or more epoxy groups couple|bonded with the alicyclic in a molecule|numerator. "The epoxy group couple|bonded with the alicyclic" means the oxygen atom -O- of bridge|crosslinking in the structure shown to a following formula. In the following formula, m is an integer of 2 to 5.

In the formula (CH ₂ ) _m in which one or more hydrogen atoms have been removed, the compound in which the group is bonded to another chemical structure may be an alicyclic epoxy compound. (CH ₂ ) One or more hydrogen atoms in _m may be suitably substituted with a straight-chain alkyl group such as a methyl group or an ethyl group. Among the alicyclic epoxy compounds, the epoxy compound which has an oxabicyclohexane ring (the thing of m=3 in the said formula) and the oxabicycloheptane ring (the thing of m=4 in the said formula) is a polarizer (10) It is preferably used at the point of providing the outstanding adhesiveness between the polarization|polarized-light area|region 11 of and the hardened|cured material of curable resin (X) which forms the non-polarization area|region 12. Although the alicyclic epoxy compound used preferably is specifically illustrated below, it is not limited to these compounds.

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

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

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

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

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

[In formula (VI), R ¹² and R ¹³ each 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] Epoxycyclohexylmethyl ethers of polyethylene glycol represented by the following formula (VII):

[In formula (VII), R ¹⁴ and R ¹⁵ each 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] Epoxycyclohexylmethyl ethers of alkanediol represented by the following formula (VIII):

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

[f] a diepoxytrispiro compound represented by the following formula (IX):

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

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

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

[h] Vinylcyclohexene diepoxides represented by the following formula (XI):

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

[i] Epoxycyclopentyl ethers represented by the following formula (XII):

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

As an aliphatic epoxy compound, the polyglycidyl ether of an aliphatic polyhydric alcohol or its alkylene oxide adduct is mentioned. More specifically, diglycidyl ether of 1,4-butanediol; diglycidyl ether of 1,6-hexanediol; triglycidyl ether of glycerin; triglycidyl ether of trimethylolpropane; diglycidyl ether of polyethylene glycol; diglycidyl ether of propylene glycol; and polyglycidyl ethers of polyether polyols obtained by adding one or more alkylene oxides (ethylene oxide or propylene oxide) to an aliphatic polyhydric alcohol such as ethylene glycol, propylene glycol or glycerin.

A hydrogenated epoxy compound is obtained by making epichlorohydrin react with the alicyclic polyol obtained by performing a hydrogenation reaction on the aromatic ring of an aromatic polyol. As an aromatic polyol, Bisphenol type compounds, such as bisphenol A, bisphenol F, and bisphenol S; novolak-type resins such as phenol novolac resins, cresol novolac resins, and hydroxybenzaldehyde phenol novolac resins; and polyfunctional compounds such as tetrahydroxydiphenylmethane, tetrahydroxybenzophenone and polyvinylphenol. As a preferable thing among a hydrogenation epoxy compound, the diglycidyl ether of hydrogenated bisphenol A is mentioned.

Curable resin (X) may contain a (meth)acrylic-type compound etc. with active energy ray-curable compounds, such as an epoxy compound. By using the (meth)acrylic compound together, the adhesiveness between the hardened|cured material of curable resin (X) which forms the polarization area|region 11 of the polarizer 10, and the non-polarization area|region 12, curable resin (X) An effect of increasing the hardness and mechanical strength of the cured product can be expected, and furthermore, it becomes possible to more easily adjust the viscosity and curing rate of the curable resin (X). "(meth)acryl" means at least one selected from the group which consists of acryl and methacryl.

It is preferable that curable resin composition containing curable resin (X) contains a polymerization initiator. As a polymerization initiator, cationic polymerization initiators, such as a photocationic polymerization initiator, and a radical polymerization initiator are mentioned. A photocationic polymerization initiator generates a cationic species or a Lewis acid by irradiation of active energy rays, such as a visible light ray, an ultraviolet-ray, X-ray, an electron beam, and initiates the polymerization reaction of an epoxy group. As described above, the curable resin (X) is preferably an ultraviolet curable resin that is cured by irradiation with ultraviolet rays, and the curable resin (X) preferably contains an alicyclic epoxy compound. Therefore, the polymerization initiator in this case is , it is preferable to generate a cationic species or a Lewis acid by irradiation with ultraviolet rays.

The curable resin composition further contains additives such as a photosensitizer, a polymerization accelerator, an ion trapping agent, an antioxidant, a chain transfer agent, a tackifier, a thermoplastic resin, a filler, a flow regulator, a plasticizer, an antifoaming agent, an antistatic agent, a leveling agent can do.

(Manufacturing method of polarizer)

3A to 3E are schematic cross-sectional views schematically illustrating an example of a method for manufacturing the polarizer of the present embodiment. Although the case where the polarizer 10 shown to FIG. 1(b) is obtained is shown in FIG.3(a)-(e), the polarizer 10 shown to FIG.1(c) and (d) Also, it can be manufactured by the method described below. The polarizer 10 can be manufactured using the raw material polarizer 20 which has the same visibility correction|amendment polarization degree Py and does not have the non-polarization area|region 12, for example. Since the raw polarizer 20 is formed only in the polarization region 11 of the polarizer 10, the thickness of the raw polarizer 20 is 15 μm or less, which is the same thickness as the polarization region 11 of the polarizer 10. desirable.

The polarizer 10 can be manufactured, for example by the following process. First, as shown in Fig. 3(a), on one surface of the raw material polarizer 20, the first laminate 31 provided with the first support layer 25 so as to be peelable with respect to the raw material polarizer 20. Prepare. With respect to the prepared first laminate 31, a through hole 32 penetrating in the lamination direction is formed by punching, cutout, cutting, laser cutting, or the like (FIG. 3(b)). Thereby, the open hole polarizer 21 in which the through hole 22 was formed in the raw material polarizer 20 is obtained. Subsequently, after the second support layer 26 is provided so as to be peelable on the side of the aperture polarizer 21 of the first laminate 31 in which the through hole 32 is formed (FIG. 3(c)), the first support layer ( 25) is peeled off (FIG. 3(d)). Thereby, the 2nd laminated body 33 in which the 2nd support layer 26 and the opening hole polarizer 21 were laminated|stacked is obtained (FIG.3(d)). The second support layer 26 is provided so as to block one side of the through hole 22 of the apertured polarizer 21 .

Next, the through hole 22 of the aperture polarizer 21 of the second laminate 33 is filled with a curable resin composition containing the curable resin (X), and by irradiating an active energy ray, the through hole ( 22) The curable resin (X) inside is cured. Thereby, the hardened|cured material of curable resin (X) is formed in the through-hole 22 of the opening hole polarizer 21, and the polarizer 10 laminated|stacked on the 2nd support layer 26 is obtained (FIG.3(e)) )).

After forming hardened|cured material, the 2nd support layer 26 may peel. As for the obtained polarizer 10, the area|region other than the through-hole 22 of the apertured polarizer 21 became the polarization area|region 11, and the area|region of the through-hole 22 in which the hardened|cured material was provided became the non-polarization area|region 12. .

It does not specifically limit as a method of filling the curable resin composition in the through-hole 22 of the apertured polarizer 21. As shown in FIG. For example, the curable resin composition may be injected into the through hole 22 of the perforated polarizer 21 of the second laminate 33 using a dispenser or dispenser, or the second laminate 33 . While coating the curable resin composition on the surface of the apertured polarizer 21, the through hole 22 of the apertured polarizer 21 may be filled with the curable resin composition. The cured product layer of the curable resin composition coated on the surface of the aperture polarizer 21 can be a protective layer to be described later. When coating curable resin composition, you may provide a base film so that the coating layer surface formed by coating may be covered. A base film may be used as a protective layer mentioned later, and in this case, the hardened|cured material layer of curable resin (X) is good also as a bonding layer for bonding the protective layer mentioned later. You may peel a base film after hardening of curable resin (X) contained in curable resin composition.

The support layer used at the time of manufacture of the raw material polarizer 20 may be sufficient as the 1st support layer 25, and the said base film used when coating curable resin composition may be used for it. Alternatively, a peelable support layer bonded to the raw material polarizer 20 with a volatile liquid such as water may be sufficient, or a peelable adhesive sheet may be used with respect to the raw material polarizer 20 . The second support layer 26 may be a peelable support layer bonded to the aperture polarizer 21 with a volatile liquid such as water, or may be a peelable adhesive sheet with respect to the aperture polarizer 21 .

As described above, when the thickness of the raw material polarizer 20 is 15 µm or less, the depth of the through hole 22 provided in the apertured polarizer 21 can also be 15 µm or less. Thereby, the filling of the curable resin composition into the through-holes 22 of the perforated polarizer 21 and the curing treatment of the curable resin (X) contained in the curable resin composition filled in the through-holes 22 can be performed in a short time. Therefore, a decrease in workability can be suppressed.

(raw polarizer)

It is preferable that the raw material polarizer 20 is not remarkably changed in quality by the active energy ray irradiated in order to harden curable resin (X) in the curable resin composition filled in the through hole 22. The raw material polarizer 20 is, for example, a film in which a dichroic dye is adsorbed and aligned on a polyvinyl alcohol-based resin film, or a dichroic dye is oriented in a cured layer of a polymerizable liquid crystal compound, and their manufacturing method is described above. As described for one polarization region 11 .

<Polarizer complex>

Fig. 4(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present embodiment, and Fig. 4(b) is a schematic plan view of the polarizer composite on the reinforcing material side. In FIG.4(b), the non-polarization area|region 12 of the polarizer 10 is shown by the broken line. A polarizer composite 41 shown in FIG. 4A includes a polarizer 10 and a reinforcing material 50 provided on one surface side of the polarizer 10 . The reinforcing material 50 may be provided on both surfaces of the polarizer 10 .

In the polarizer composite 41 , the reinforcing material 50 has a plurality of cells 51 arranged so that each open end face faces the face of the polarizer 10 . The cell 51 has a hollow columnar (cylindrical) structure surrounded by cell partition walls 53 that partition the cell 51, and has an open end face with both ends of the columnar structure open in the axial direction.

In the polarizer composite 41, the reinforcing material 50 is, as shown in FIG. It is preferable to provide so that it exists, and it is more preferable to provide so that the cell 51 exists on the front surface of the polarizer 10 .

Since the polarizer 10 has the non-polarization region 12, it is thought that cracks are likely to occur in the periphery of the non-polarization region 12 due to the contraction of the polarizer 10 according to the temperature change received when applied to a display device, etc. . Moreover, since the thickness of the polarization area|region 11 is 15 micrometers or less, since the polarizer 10 receives an impact, it is thought that it is easy to generate|occur|produce a crack. 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 occurrence of cracks in the case of temperature change or impact, or the progress of fine cracks into large cracks. I think it can

Although the polarizer composite 41 shown in FIG.4(a) has the polarizer 10 and the reinforcement material 50 shown in FIG.1(b), respectively, it is not limited to this. For example, the polarizer 10 included in the polarizer composite 41 may be the polarizer 10 shown in FIG. 1(c) or (d).

The reinforcing material 50 is applied to a display device or the like together with the polarizer 10 . If the inner space of the cell 51 of the reinforcing material 50 is hollow, the visibility of the display device may be reduced due to a difference in refractive index between the cell partition wall 53 and the inner space of the cell 51 . Therefore, it is preferable that a light-transmitting filler is provided in the inner space of the cell 51 of the reinforcing material 50 in the polarizer composite 41 . In the reinforcing material 50 of the polarizer composite 41, when a gap is provided between the plurality of cells 51 as will be described later, a light-transmitting filler is preferably provided also in the gap.

The filler that may be provided in the reinforcing material 50 is not particularly limited as long as it has light-transmitting properties and can fill the inner space of the cell 51 of the reinforcing material 50 . The filler is preferably a material different from the material constituting the cell partition walls 53 of the reinforcing material 50 , and more preferably contains a resin material. Examples of the resin material include at least one selected from the group consisting of a thermoplastic resin, a thermosetting resin, and a curable resin such as an active energy ray-curable resin, and may be an adhesive or an adhesive.

Examples of the thermoplastic resin include polyolefin-based resins such as chain polyolefin-based resins (polypropylene-based resins, etc.) and cyclic polyolefin-based resins (norbornene-based resins, etc.); Cellulose ester-type resin, such as a triacetyl cellulose and a diacetyl cellulose; polyester-based resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate-based resin; (meth)acrylic resin; polystyrene-based resin; polyether-based resin; polyurethane-based resin; polyamide-based resin; polyimide-based resin; A fluorine-type resin etc. are mentioned.

As curable resin, the said curable resin (X) is mentioned, for example.

An adhesive expresses adhesiveness by adhering itself to a to-be-adhered body, and is what is called a so-called pressure-sensitive adhesive. Examples of the pressure-sensitive adhesive include those containing, as a main component, a polymer such as a (meth)acrylic polymer, a silicone polymer, a polyester polymer, a polyurethane polymer, a polyether polymer, or a rubber polymer.

In this specification, a main component means the component containing 50 mass % or more in the total solid of an adhesive. An active energy ray hardening type or a thermosetting type may be sufficient as an adhesive, and it may adjust a crosslinking degree and adhesive force by active energy ray irradiation or heating.

An adhesive agent contains a sclerosing|hardenable resin component, and is an adhesive agent other than a pressure-sensitive adhesive agent (adhesive agent). Examples of the adhesive include a water-based adhesive in which a curable resin component is dissolved or dispersed in water, an active energy ray-curable adhesive containing an active energy ray-curable compound, and a thermosetting adhesive.

As the adhesive, a water-based adhesive commonly used in the technical field of polarizing plates may be used.

Examples of the resin component contained in the water-based adhesive include polyvinyl alcohol-based resins and urethane-based resins. As an active energy ray-curable adhesive agent, the composition hardened|cured by irradiation of active energy rays, such as an ultraviolet-ray, a visible light, an electron beam, and X-ray, is mentioned. As an active energy ray-curable adhesive agent, you may use the curable resin composition containing the said curable resin (X). Examples of the thermosetting adhesive include those containing an epoxy-based resin, a silicone-based resin, a phenol-based resin, a melamine-based resin, and the like as a main component.

(reinforcement)

As described above, the cell 51 of the reinforcing material 50 has a hollow columnar (tubular) structure surrounded by the cell partition walls 53 that partition the cell 51, and both ends of the columnar structure in the axial direction are open. It has an open end face. The cell 51 has, as an open end face, a first open end face disposed on a side having a relatively close distance from the polarizer 10 of the polarizer composite 41 and a second open end face disposed on a relatively far side. . As for the reinforcing material 50, at least one of a 1st open end surface and a 2nd open end surface should just be arranged so that it may oppose the polarizer 10, and both a 1st open end surface and a 2nd open end surface are a polarizer. It is preferable to arrange so as to face (10).

The shape of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, but is preferably a polygonal shape, a circular shape, or an elliptical shape. The shape of the opening of the first open end face and the shape of the opening of the second open end face are preferably the same shape of the same size, but may have different shapes or may have the same shape and different sizes. In addition, the shape of the opening of the some cell which the reinforcing material 50 has may mutually be same or mutually different may be sufficient as it.

It is preferable that the plurality of cells 51 included in the reinforcing material 50 are arranged so that the openings of the cells 51 are adjacent to each other in a plan view of the end surface of the opening. In the case of the plurality of cells 51 in a plan view of the end faces of the openings, for example, as in the case where the openings of the cells 51 shown in FIG. They may be arranged so as to be arranged. Alternatively, in the case where the openings of the cells 51 have a circular shape or the like in a plan view of the opening end faces of the plurality of cells 51 , a part of the cell partition walls 53 of the plurality of cells 51 is They may be arranged so as to be in contact with the plurality of cells 51 with a gap therebetween.

The reinforcing material 50 has, for example, a hexagonal shape of an opening in both of the first open end face and the second open end face, as shown in FIG. In this case, it is preferable to have a honeycomb structure in which a plurality of cells are arranged so that the openings are arranged adjacent to each other without gaps.

Although the size of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, it is preferable to have a diameter smaller than the diameter of the non-polarization region 12 . The diameter of the cell is preferably 3 mm or less, may be 2 mm or less, may be 1 mm or less, and is usually 0.1 mm or more, and may be 0.5 mm or more. The diameter of the opening of the cell 51 is the length of the longest straight line connecting two arbitrary points on the outer periphery of the opening.

The height of the cell 51 of the reinforcing material 50 (the length in the direction perpendicular to the open end face of the cell 51) is usually 0.1 μm or more, may be 0.5 μm or more, may be 1 μm or more, and may be 3 μm or more. may be, and usually 15 µm or less, 13 µm or less, or 10 µm or less.

It is preferable that the cell partition walls 53 partitioning the cells 51 of the reinforcing material 50 have light-transmitting properties.

The line width of the cell partition 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, may be 0.5 mm or more, may be 1 mm or more, and is usually 5 mm or less and 3 mm or less. good night.

The cell partition walls 53 of the reinforcing material 50 can be formed of, for example, a resin material or an inorganic oxide, and are preferably formed of a resin material. Curable resins, such as a thermoplastic resin, a thermosetting resin, and an active-energy-ray-curable resin, etc. are mentioned as a resin material. As a resin material, For example, the said curable resin (X); The thermoplastic resin etc. illustrated as a thermoplastic resin used for the said filler are mentioned. As an inorganic oxide, _a silicon oxide (SiO2), aluminum oxide, etc. are mentioned.

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

(Method for producing polarizer complex)

The polarizer composite 41 illustrated in FIG. 4A can be manufactured by forming the reinforcing material 50 in the polarizer 10 . The reinforcing material 50 can be obtained by, for example, forming the cell partition walls 53 that partition the cells 51 on the surface of the polarizer 10 using a resin material or an inorganic oxide.

Although it does not specifically limit as a method of forming the cell partition 53 using a resin material, For example, Printing methods, such as inkjet printing, screen printing, gravure printing; photolithography; The coating method using a nozzle, a die|dye, etc. are mentioned. In the said method, you may use the resin composition which mixed the resin material with a solvent, an additive, etc. As an additive, a leveling agent, antioxidant, a plasticizer, a tackifier, organic or inorganic filler, a pigment, antioxidant, a ultraviolet absorber, antioxidant, etc. are mentioned. The cell partition walls 53 may be formed by subjecting the printed or applied resin composition to a treatment for solidification or curing as needed.

Although it does not specifically limit as a method of forming the cell partition 53 using an inorganic oxide, For example, it can form by vapor-depositing an inorganic oxide.

When the reinforcing material 50 of the polarizer composite 41 has a filler, with respect to the reinforcing material 50 formed in the polarizer 10, a filler is formed in the inner space of the cell 51 or in the gap between the cells 51 . You just need to fill the material. The material constituting the filler may be filled, for example, by coating it on the reinforcing material 50 . Or, when using an adhesive as a material which comprises a filler, the adhesive sheet which provided the adhesive layer on the release film may be bonded together, and an adhesive may be filled.

<Optical laminate>

5-8 are schematic cross-sectional views which show typically an example of the optical laminated body of this embodiment. The optical laminate has a protective layer on one side or both sides of the polarizer 10 shown in FIGS. 1B to 1D and the polarizer composite 41 shown in FIG. 4A.

(Optical laminate (1))

The optical laminate 42 shown in FIGS. It has a protective layer 17 provided on the. The protective layer 17 is a hardened|cured material layer of curable resin (X) provided directly on the polarizer 10. The curable resin (X) constituting the protective layer 17, which is the cured material layer, is not particularly limited as long as it is a resin that is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. For example, the curable resin described above (X) is mentioned. The protective layer 17 is a cured product layer of a curable resin composition containing the same curable resin (X) as the curable resin (X) constituting the cured product contained in the non-polarization region 12 of the polarizer 10 desirable.

When the protective layer 17 is a cured product layer of the same curable resin (X) as the curable resin (X) constituting the cured product of the polarizer 10 , the protective layer 17 is at least a non-polarization region of the polarizer 10 . It is preferable to cover (12). The protective layer 17 should just cover at least a part of single side|surface of the polarizer 10, but it is preferable to coat|cover the whole surface of the single side|surface of the polarizer 10. As shown in FIG.

In order to manufacture the optical laminated body 42, for example, the curable resin composition is coated on one side of the polarizer 10, and curable resin (X) contained in the said curable resin composition is hardened by irradiating an active energy ray. Thereby, on the polarizer 10, the protective layer 17 which is a hardened|cured material layer of curable resin (X) may be formed, and the optical laminated body 42 may be obtained.

Alternatively, by first coating the curable resin composition on the surface of the apertured polarizer 21 of the second laminate 33 (FIG. 3(d)), the through hole 22 of the apertured polarizer 21 is The curable resin composition is filled, and a coating layer of the curable resin composition is also formed on the surface of the aperture polarizer 21 . Thereafter, by irradiation with an active energy ray, the curable resin (X) contained in the curable resin composition in and on the surface of and in the through hole 22 of the apertured polarizer 21 is cured, and the cured product and the cured product layer are a protective layer. (17) may be formed to obtain the optical laminate 42. In this case, the hardened|cured material contained in the non-polarization area|region 12, and the hardened|cured material layer which comprises the protective layer 17 can be integrated, and curable resin X which comprises the protective layer 17 is non-polarization. It can be set as the same curable resin (X) as curable resin (X) which comprises the hardened|cured material contained in the area|region 12.

In order to manufacture the optical laminated body 42 shown in FIGS. When providing 17), you may provide the protective layer 17 so that the difference of the thickness of the polarization area|region 11 of the polarizer 10 and the non-polarization area|region 12 may be filled. Specifically, when obtaining the optical laminated body 42 shown in FIG.5(b), in the non-polarization area|region 12 of the polarizer 10 shown in FIG.1(c), the polarization region ( 11), the curable resin (X) is coated so as to fill the difference in thickness and cover the surface of the polarization region 11 on the side (the upper surface side in Fig. 1(c)) Thus, the protective layer 17 may be provided. When obtaining the optical laminated body 42 shown to FIG.5(c), the non-polarization area|region 12 rather than the surface of the polarization area|region 11 of the polarizer 10 shown to FIG.1(d) is On the protruding side (the upper surface side of FIG. may be coated to provide a protective layer 17 . In the optical laminate 42 shown in FIG.5(c), although the protective layer 17 is provided also in the surface of the non-polarization area|region 12, the surface of the non-polarization area|region 12 is not coat|covered, but polarized light The protective layer 17 may be provided so as to cover only the surface of the region 11 .

When coating curable resin composition, you may provide a base film so that the coating layer surface formed by coating may be covered. In this case, the base film may be used as the protective layer 17 , and the cured product layer of the curable resin (X) may be used as a bonding layer for bonding the protective layer 17 to the polarizer 10 . You may peel a base film after hardening of curable resin (X).

(Optical laminate (2))

6 : is a schematic sectional drawing which shows typically another example of the optical laminated body of this embodiment. The optical laminated body 43 shown in FIG. 6 has the optical laminated body 42 which has the protective layer 17 of the hardened|cured material layer of curable resin (X) on single side|surface of the polarizer 10 (FIG.5(a)) )) and a reinforcing material 50 provided on the polarizer 10 side of the optical laminate 42 . The reinforcing material 50 may be provided also on the protective layer 17 side of the optical laminated body 42 shown to Fig.5 (a).

The reinforcing material 50 is as described for the polarizer composite 41 . The optical laminated body 43 shown in FIG. 6 can be obtained by forming the reinforcing material 50 in the optical laminated body 42 shown to FIG.5(a) by the said method, for example. Alternatively, after forming the reinforcing material 50 in the polarizer 10 shown in FIGS. ) may be obtained.

(Optical laminate (3))

The optical laminate 44 shown in FIG. 7 has protective layers 17 and 18 on both surfaces of the polarizer 10 shown in FIG.1(b). The optical laminate 44 may have the protective layer 17 (or 18) only on the single side|surface side of the polarizer 10. The polarizer 10 contained in the optical laminated body 44 may be the polarizer 10 shown in FIG.1(c) or (d). The protective layers 17 and 18 may be provided on the polarizer 10 through a bonding layer such as an adhesive layer or an adhesive layer. In this case, for example, a film-type protective layer may be laminated on the polarizer 10 through a bonding layer. The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizer 10 without passing through the bonding layer. In this case, for example, a composition containing a resin material constituting the protective layers 17 and 18 is applied on the polarizer 10, and the protective layers 17 and 18 are formed by solidifying or curing the applied layer. can be formed One of the protective layers 17 and 18 may be a protective layer provided through the bonding layer, and the other may be a protective layer provided without passing through the bonding layer. The protective layers 17 and 18 included in the optical laminate 44 may be the same as or different from each other.

When the optical laminate 44 is a thing in which the protective layers 17 and 18 are provided in the polarizer 10 shown to Fig.1 (c) or (d) through a bonding layer, the polarization|polarized-light of the polarizer 10 It is preferable to provide a bonding layer so that the difference of the thickness of the area|region 11 and the non-polarization area|region 12 may be filled, and to provide the protective layers 17 and 18. When the protective layers 17 and 18 are provided so that the optical laminate 44 may directly contact the polarizer 10 shown in FIG.1(c) or (d), the polarization region of the polarizer 10 It is preferable to provide the composition containing the resin material which comprises the protective layers 17 and 18 so that the difference of the thickness of (11) and the non-polarization area|region 12 may be filled, and to form the protective layers 17 and 18. .

(optical laminate (4))

The optical laminate 45 shown in FIG. 8 has protective layers 17 and 18 on both sides of the polarizer composite 41 shown in FIG. 4(a). The optical laminate 45 may have the protective layer 17 (or 18) only on the single side|surface side of the polarizer composite 41. The protective layers 17 and 18 may be provided on the polarizer composite 41 through a bonding layer such as an adhesive layer or an adhesive layer. In this case, for example, a film-type protective layer may be laminated on the polarizer composite 41 through a bonding layer. The protective layer 18 provided on the side of the reinforcing material 50 of the polarizer composite 41 is, for example, to fill the inner space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51 . What is necessary is just to provide a bonding layer and to laminate|stack a protective layer. Alternatively, by laminating a laminated sheet in which an application layer of a material serving as a bonding layer is formed on one side of the film-type protective layer on the reinforcing material 50, the inner space of the cell 51 of the reinforcing material 50, and a plurality of cells ( 51), the protective layer may be formed by filling the gap or the like with a material serving as the bonding layer. In addition, in FIG. 8, although it illustrated about the case where the reinforcing material was provided in the surface on one side of the polarizer 10, you may provide the reinforcing material 50 in both surfaces of the polarizer 10.

The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizer composite 41 without passing through the bonding layer. The protective layer 17 provided on the polarizer 10 side of the polarizer composite 41 is applied, for example, to a composition containing a resin material constituting the protective layer 17 on the polarizer 10 of the polarizer composite 41 . It can be formed by, for example, applying to the coating layer and solidifying or curing the coating layer. The protective layer 18 provided on the reinforcing material 50 side of the polarizer composite 41 is protected so as to fill the internal space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51 . A composition containing a resin material constituting the layer 18 may be provided, and the protective layer 18 may be filled and formed.

One of the protective layers 17 and 18 may be a protective layer provided through the bonding layer, and the other may be a protective layer provided without passing through the bonding layer. The protective layers 17 and 18 included in the optical laminate 44 may be the same as or different from each other.

(protective layer)

It is preferable that the protective layers 17 and 18 are a resin layer which can transmit light, and a resin film may be sufficient as it, and the coating layer formed by apply|coating the composition containing a resin material may be sufficient as it. The resin used for the resin layer is preferably a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, stretchability, and the like. As a thermoplastic resin, the thermoplastic resin which comprises the base film which may be used for manufacture of the said raw material polarizer 20 is mentioned. When the optical laminates 42 to 45 have the protective layers 17 and 18 on both surfaces, the resin compositions of the protective layers 17 and 18 may be the same as or different from each other.

The thickness of the protective layers 17 and 18 is usually 200 µm or less, preferably 150 µm or less, more preferably 100 µm or less, 80 µm or less, or 60 µm or less from the viewpoint of reducing the thickness. The thickness of the protective layers 17 and 18 is usually 5 µm or more, and may be 10 µm or more, or 20 µm or more. The protective layers 17 and 18 may or may not have a phase difference. When the optical laminates 42 to 45 have protective layers 17 and 18 on both surfaces, the thicknesses of the protective layers 17 and 18 may be the same as or different from each other.

(bonding layer)

A bonding layer is an adhesive layer or an adhesive bond layer. Examples of the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer and the adhesive for forming the adhesive layer include pressure-sensitive adhesives and adhesives used to constitute the filler.

<Laminate body having bonding layer for optical display element>

The polarizer 10 shown in FIGS. , You may further have the bonding layer for optical display elements for bonding to the optical display element (liquid crystal panel, organic electroluminescent element) of display apparatuses, such as a liquid crystal display device and an organic electroluminescent display.

In the polarizer 10, the polarizer composite 41, and the optical laminates 42 to 45, the polarization region 11 and the non-polarization region like the polarizer 10 shown in Fig. 1(c) or (d). When providing the bonding layer for optical display elements in the surface in which the difference in thickness occurred between (12), it is preferable to provide the bonding layer for optical display elements so that this thickness difference may be filled.

In the polarizer composite 41 and the optical laminates 43 and 45 , when providing the bonding layer for optical display elements on the surface of the reinforcing material 50 , bonding for optical display elements as a filler provided in the reinforcing material 50 . Using the material constituting the layer, the filling of the filler to the inner space of the cell 51 of the reinforcing material 50, etc., and the formation of the bonding layer for optical display elements may be performed simultaneously.

10 polarizer, 11: polarization region, 11m: first plane, 11n: second plane, 12: non-polarization region, 17, 18: protective layer, 20: raw polarizer, 21: perforated polarizer, 22: through hole, 25: : first support layer, 26: second support layer, 31: first laminate, 32: through hole, 33: second laminate, 41: polarizer composite, 42 to 45: optical laminate, 50: reinforcing material, 51: cell , 53: cell bulkhead.

Claims (14)

It has a polarization region and a non-polarization region surrounded by the polarization region in plan view,
The thickness of the polarization region is 15 μm or less,
The said non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole enclosed by the said polarization area|region in planar view, The polarizer. The polarizer of claim 1 , wherein a thickness of the cured product is the same as a thickness of the polarization region. The polarizer of claim 1 , wherein a thickness of the cured product is smaller than a thickness of the polarization region. The polarizer of claim 1 , wherein a thickness of the cured product is greater than a thickness of the polarization region. The polarizer according to any one of claims 1 to 4, wherein the non-polarization region has light-transmitting properties. The polarizer according to any one of claims 1 to 5, wherein a diameter of the non-polarization 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 contains an epoxy compound. The polarizer according to claim 7, wherein the epoxy compound includes an alicyclic epoxy compound. A polarizer composite comprising the polarizer according to any one of claims 1 to 8 and a reinforcing material provided on at least one surface side of the polarizer,
The reinforcing material is a polarizer composite having a plurality of cells arranged so that each of the opening end faces faces the face of the polarizer. The polarizer composite according to claim 9, wherein the opening of the cell has a polygonal shape, a circular shape, or an elliptical shape. The polarizer composite according to claim 9 or 10, wherein a light-transmitting filler is further provided in the inner space of the 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 is the same active energy ray-curable resin as the active energy ray-curable resin constituting the cured product contained in the polarization region.

Images