KR20220150278A - Polarizing film and image display device - Google Patents

Abstract

This invention provides the polarizing film which can fully suppress the permeation|transmission to the outside of the iodine contained in a polarizer in a high-temperature, high-humidity environment. The polarizing film of this invention is equipped with the resin layer containing a polarizer and a polymer, and at least 1 is established among the following requirements (i)-(v).
(i) The tensile storage modulus E1 of the resin layer is 1×10 ⁸ Pa or more.
(ii) The tensile storage modulus E2 of the resin layer is 1×10 ⁸ Pa or more.
(iii) The coefficient of linear expansion α1 of the resin layer is 400 × 10 ^-6 /K or less.
(iv) The coefficient of linear expansion α2 of the resin layer is 300 × 10 ^-6 /K or less.
(v) the dipole moment D of the monomer for forming the polymer is 2 Debye or less.

Description

Polarizing film and image display device

The present invention relates to a polarizing film and an image display device.

Image display apparatuses, such as a liquid crystal display device and an organic electroluminescent display, are equipped with a polarizing film from reasons, such as the display principle, for example. A polarizing film is a laminated body containing a polarizer and a transparent protective film, for example. A polarizer can generally be manufactured by making a dichroic dye adsorb|suck to hydrophilic polymer films, such as a polyvinyl alcohol (PVA) film, and uniaxially stretching the said film. From a viewpoint of improving the transmittance|permeability and polarization degree of a polarizer, an iodine is widely used as a dichroic dye.

Patent Document 1 discloses an optical laminate in which a polarizer and a protective film are adhered through a cured layer of a curable resin composition. From Patent Document 1, by appropriately adjusting the content of the alicyclic epoxy compound in the curable resin composition, even when the optical laminate is placed in a high-temperature and high-humidity environment, it is recognized that the content of iodine in the cured layer can be kept low. can

Japanese Laid-Open Patent Publication No. 2018-169512

In a high-temperature and high-humidity environment, the iodine contained in a polarizer tends to move from a polarizer to the adhesive layer for bonding a transparent protective film or a polarizing film to an image display panel. In particular, when the thickness of a polarizer is small and the density|concentration of the iodine in a polarizer is high, iodine is easy to move from a polarizer to a transparent protective film or an adhesive layer. The iodine that has moved to the transparent protective film or the pressure-sensitive adhesive layer is transmitted through the transparent protective film or the pressure-sensitive adhesive layer to the outside of the polarizing film. When the content rate of the iodine in a polarizer falls, the polarization degree of a polarizing film will fall.

In the conventional polarizing film, it cannot fully suppress that the iodine contained in a polarizer permeate|transmits to the outside of a polarizing film in a high-temperature and high-humidity environment. For example, patent document 1 pays attention to keeping low the content rate of the iodine in a hardened layer, when an optical laminated body is set|placed in a high-temperature and high-humidity environment. However, Patent Document 1 does not consider that iodine permeates from the polarizer to the outside of the optical laminate.

Then, this invention is a high temperature and high humidity environment. WHEREIN: It aims at providing the polarizing film which can fully suppress the permeation|transmission to the outside of the iodine contained in a polarizer.

As a result of earnest examination, the present inventors WHEREIN: In a polarizing film provided with a resin layer, the dipole moment of the monomer for forming the tensile storage elastic modulus of a resin layer, the linear expansion coefficient of a resin layer, and the polymer contained in a resin layer, respectively was newly discovered that it can be used as an index regarding the permeation of iodine to the outside, resulting in the completion of the present invention.

The present invention is

A polarizer containing iodine;

A resin layer comprising a polymer is provided,

Among the following requirements (i) - (v), the polarizing film in which at least 1 is satisfied is provided.

(i) The tensile storage elastic modulus E1 of the said resin layer in 65 degreeC in water is 1x10< ⁸ >Pa or more.

(ii) The tensile storage elastic modulus E2 of the said resin layer in 85 degreeC in water is 1x10< ⁸ >Pa or more.

(iii) The coefficient of linear expansion α1 of the resin layer when the resin layer is heated from 25°C to 65°C and the measurement atmosphere is further humidified from 10%RH to 90%RH is 400×10 ^-6 /K is below.

(iv) When the resin layer is heated from 25°C to 85°C and the measurement atmosphere is further humidified from 10%RH to 85%RH, the coefficient of linear expansion α2 of the resin layer is 300×10 ^-6 /K is below.

(v) the dipole moment D of the monomer for forming the polymer is 2 Debye or less.

ADVANTAGE OF THE INVENTION According to this invention, in a high-temperature, high-humidity environment, the polarizing film which can fully suppress the permeation|transmission to the outside of the iodine contained in a polarizer can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing of the polarizing film which concerns on one Embodiment of this invention.
It is a schematic sectional drawing which shows the modified example of a polarizing film.
3 : is a schematic sectional drawing which shows the other modified example of a polarizing film.
4 : is a schematic sectional drawing which shows still another modified example of a polarizing film.
5 is a schematic cross-sectional view of an image display device according to an embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, although the detail of this invention is demonstrated, the following description is not the meaning which restrict|limits this invention to specific embodiment.

(Embodiment of polarizing film)

As shown in FIG. 1, the polarizing film 10 of this embodiment is equipped with the polarizer 1 containing an iodine, and the resin layer 2 containing the polymer P. The resin layer 2 is located on the visual recognition side rather than the polarizer 1, and is in direct contact with the polarizer 1, for example. However, between the resin layer 2 and the polarizer 1, other layers, such as an adhesive bond layer and an easily bonding layer, may be arrange|positioned in the range which does not impair the effect of this invention. The resin layer 2 may be located in the image display panel side mentioned later rather than the polarizer 1. In other words, the polarizer 1 may be located on the visual recognition side rather than the resin layer 2 . The resin layer 2 is located at the outermost side of the polarizing film 10 , for example. In addition, in this specification, a "film" means a member whose thickness is sufficiently small compared with length and width|variety.

The polarizing film 10 may further be equipped with the adhesive bond layer 3, the transparent protective film (1st transparent protective film) 4, and the adhesive layer 5. The transparent protective film 4 is bonded to the polarizer 1 via the adhesive layer 3, for example. The adhesive layer 5 functions as a member for bonding the polarizing film 10 to the image display panel mentioned later, for example. Therefore, the adhesive layer 5 is the outermost of the polarizing film 10, and is located rather than the polarizer 1 on the image display panel side, for example. In other words, the polarizer 1 is located on the visual recognition side rather than the adhesive layer 5, for example. The resin layer 2, the polarizer 1, the adhesive bond layer 3, the transparent protective film 4, and the adhesive layer 5 are arranged in this order in the lamination direction, for example.

In the polarizing film 10 of the present embodiment, at least one of the following requirements (i) to (v) is established, and preferably the requirement (iii) is satisfied. In the polarizing film 10, all of the requirements (i) to (v) may be satisfied.

(i) Tensile storage elastic modulus E1 of the resin layer (2) at 65°C in water is 1×10 ⁸ Pa or more.

(ii) Tensile storage elastic modulus E2 of the resin layer (2) at 85°C in water is 1×10 ⁸ Pa or more.

(iii) The coefficient of linear expansion α1 of the resin layer 2 when the resin layer 2 is heated from 25°C to 65°C and the measurement atmosphere is further humidified from 10%RH to 90%RH is 400×10 ^-6 /K or less.

(iv) The coefficient of linear expansion α2 of the resin layer 2 when the resin layer 2 is heated from 25°C to 85°C and the measurement atmosphere is further humidified from 10%RH to 85%RH is 300×10 ^-6 /K or less.

(v) The dipole moment D of the monomer M for forming the polymer P contained in the resin layer (2) is 2 Debye or less.

First, the requirement (i) will be described. The tensile storage modulus E1 of the resin layer 2 is preferably 5×10 ⁸ Pa or more, more preferably 10×10 ⁸ Pa or more, and still more preferably 15×10 ⁸ Pa or more. Although the upper limit of the tensile storage elastic modulus E1 is not specifically limited, From a viewpoint of suppressing the crack in the resin layer 2, 100x10< ⁸ >Pa may be sufficient, for example.

The tensile storage modulus E1 of the resin layer 2 can be measured, for example, by the following method. First, the resin layer 2 which is an evaluation object is cut out into strip shape of width 5mm and length 30mm, and it is set as a test piece. Next, the test piece is set in a commercially available dynamic viscoelasticity measuring device. At this time, as a jig, one capable of immersing the test piece in a solvent is used. The distance between clamps for fixing the test piece is set to 15 mm. Next, the test piece is immersed in water. After confirming that the temperature of the test piece is 25°C, the measurement of the dynamic viscoelasticity of the test piece is started. The measurement is performed by the tensile vibration-non-resonance method specified in Japanese Industrial Standards (JIS) K7244-4: 1999. The frequency of vibration is set to 1 Hz. After starting the measurement, the test piece is heated to 95°C at a temperature increase rate of 5°C/min. The measured value of the tensile storage elastic modulus when the temperature of the test piece is 65°C can be regarded as the tensile storage elastic modulus E1 of the resin layer (2).

Next, the requirement (ii) will be described. The tensile storage modulus E2 of the resin layer 2 is preferably 5 × 10 ⁸ Pa or more, more preferably 10 × 10 ⁸ Pa or more, and still more preferably 15 × 10 ⁸ Pa or more. Although the upper limit of the tensile storage elastic modulus E2 is not specifically limited, From a viewpoint of suppressing the crack in the resin layer 2, 100x10< ⁸ >Pa may be sufficient, for example. The tensile storage elastic modulus E2 of the resin layer 2 can be measured, for example, by the same method as the tensile storage elastic modulus E1. Specifically, by the method described above for the tensile storage elastic modulus E1, dynamic viscoelasticity is measured on the test piece, and the measured value of the tensile storage elastic modulus when the temperature of the test piece is 85°C is calculated as the tensile strength of the resin layer (2). It can be regarded as the storage modulus E2.

Next, the requirement (iii) will be described. The coefficient of linear expansion α1 of the resin layer 2 is preferably 200 × 10 ^-6 /K or less, more preferably 180 × 10 ^-6 /K or less, still more preferably 150 × 10 ^-6 /K or less. and particularly preferably 120 × 10 ^-6 /K or less. Although the lower limit of linear expansion coefficient (alpha)1 is not specifically limited, From a viewpoint of suppressing the crack in the resin layer 2, 10x10<^-6> /K may be sufficient, for example.

The coefficient of linear expansion α1 of the resin layer 2 can be measured, for example, by the following method. First, the resin layer 2 which is an evaluation object is cut out in the strip shape of width 5mm and length 30mm, and it is set as a test piece. Next, the test piece is set in a commercially available thermomechanical analysis apparatus. At this time, the distance between the clamps which fix the test piece is set to 15 mm. About the test piece, it is left to stand in the measurement atmosphere of 25 degreeC 10%RH for at least 10 minutes. Next, the test piece is heated to 65 degreeC over 60 minutes, and the test piece is hold|maintained for 10 minutes. Next, the measurement atmosphere is humidified from 10%RH to 90%RH over 30 minutes, and the test piece is held for 10 minutes. Based on the amount of change ΔL (mm) of the length of the test piece before and after the test, the coefficient of linear expansion α calculated from the following formula (1) can be regarded as the coefficient of linear expansion α1 of the resin layer 2 . In addition, in Formula (1), L ₀ means the length of the test piece in 25 degreeC, and ΔT means the amount of change in the temperature of the test piece before and after the test. In the requirement (iii), ΔT is 40°C.

Coefficient of linear expansion α = ΔL/(L ₀ × ΔT) (1)

Next, the requirement (iv) will be described. The coefficient of linear expansion α2 of the resin layer 2 is preferably 200 × 10 ^-6 /K or less, more preferably 170 × 10 ^-6 /K or less, still more preferably 150 × 10 ^-6 /K or less and particularly preferably 100 × 10 ^-6 /K or less. Although the lower limit of linear expansion coefficient (alpha)2 is not specifically limited, From a viewpoint of suppressing the crack in the resin layer 2, 10x10<^-6> /K may be sufficient, for example. The coefficient of linear expansion α2 of the resin layer 2 is, for example, heating the test piece to 85° C. over 60 minutes, and humidifying the measurement atmosphere from 10% RH to 85% RH over 30 minutes, except for , can be measured by the same method as the coefficient of linear expansion α1 described above. In the requirement (iv), ΔT in the formula (1) is 60°C.

Next, the requirement (v) will be described. The dipole moment D of the monomer M for forming the polymer P is preferably 1.7 Debye or less, more preferably 1.5 Debye or less, and still more preferably 1.3 Debye or less. The lower limit of the dipole moment D is not particularly limited, and is, for example, 0.5 Debye.

The dipole moment D can be calculated, for example, by the following method. First, the monomer M for forming the polymer P is specified. With respect to the monomer M, the dipole moment D can be calculated by performing molecular simulation. Molecular simulation can be performed, for example, using known software such as Materials Studio (manufactured by BIOVIA, ver.8.0.0.843) and WebMO (ver.19.0.009e).

Calculation of the dipole moment D by molecular simulation can be performed, for example by the following method. First, using Materials Studio, a molecular model of the monomer M is prepared. For the molecular model, the force field of COMPASS (Condensed-phase Optimized Molecular Potentials for Atomistic Simulation Studies) II is employed to optimize the structure. Next, the molecular model of the monomer M is processed with WebMO. In detail, in WebMO, the structure optimization calculation is performed with respect to the molecular model of the monomer M using a Gaussian program (Queue: g09). At this time, B3LYP may be used as a functional function, and 6-31G(d) may be used as a basis function. Thereby, the dipole moment D of the monomer M can be calculated.

When the polymer P is formed from plural types of monomers M, the dipole moment D can be specified by the following method. First, a dipole moment is computed by the method mentioned above about each of several types of monomer M. With respect to the calculated dipole moment, weighted average is performed by assigning a weight according to the molar ratio of each monomer M. The obtained weighted average value can be regarded as the dipole moment D. Even when a plurality of types of monomers M are structural isomers, the calculated dipole moment D can be calculated by weighting the calculated dipole moment according to the molar ratio of each structural isomer and performing a weighted average.

When at least one of the requirements (i) and (ii) is satisfied, the polymer P contained in the resin layer 2 tends to be maintained in a low molecular mobility state even in a high-temperature and high-humidity environment. When the molecular mobility of the polymer P is low, in the resin layer 2, it is difficult to create a space into which iodine can penetrate. Thereby, it can suppress that iodine moves from the polarizer 1 to the resin layer 2, and it can suppress that permeation|transmission of iodine to the outside of the polarizing film 10.

When at least one of the requirements (iii) and (iv) is satisfied, the polymer P contained in the resin layer 2 tends to be maintained in a state with a small free volume even in a high-temperature and high-humidity environment. When the free volume of the polymer P is small, in the resin layer 2, a space into which iodine can penetrate is less likely to be formed. Thereby, it can suppress that iodine moves from the polarizer 1 to the resin layer 2, and it can suppress that permeation|transmission of iodine to the outside of the polarizing film 10.

When the requirement (v) is satisfied, the electrostatic interaction between the polymer P and the iodine tends to hardly occur. That is, iodine is hardly attracted to the polymer P. Thereby, it can suppress that iodine moves from the polarizer 1 to the resin layer 2, and it can suppress that permeation|transmission of iodine to the outside of the polarizing film 10.

In the polarizing film 10 of this embodiment, less than 1.3 may be sufficient as the value of y computed by following formula (2).

y = (0.279)x ₁ + (−1.51)x ₂ + (0.178)x ₃ + 0.386 (2)

In the formula (2), x ₁ is the number of rotatable bonds contained in the monomer M for forming the polymer P. x ₁ can be an index for predicting to what extent the molecular motion of the polymer P is constrained. As used herein, the term "rotatable bond" means, among single bonds connecting heavy atoms, excluding bonds included in the ring structure, and single bonds connecting heavy atoms located at the ends and other heavy atoms . A heavy atom means an atom other than a hydrogen atom and a helium atom, Specifically, hetero atoms, such as a nitrogen atom and an oxygen atom, and a carbon atom are mentioned. Specific examples of the single bond connecting between heavy atoms are a carbon-carbon bond and a carbon-hetero atom bond. As an example, when the polymer P is formed of dimethylol-tricyclodecanediacrylate, the value of x ₁ is 8. The number of rotatable bonds may be calculated using software for calculating molecular descriptors. Examples of such software include Dragon (version 7.0) and alvaDesc.

When the polymer P is formed of a plurality of types of monomers M, the value of x ₁ can be specified by the following method. First, the number of rotatable bonds is calculated with respect to each of a plurality of types of monomers M. With respect to the calculated number of rotatable bonds, weighted average is performed by weighting according to the molar ratio of each monomer M. The obtained weighted average value can be regarded as x ₁ . In this embodiment, the value of _x1 is not specifically limited, For example, it is 2-20.

x ₂ is the number of reaction points contained in the monomer M for forming the polymer P. x ₂ may be an index for predicting how many gaps with a size that can pass through a low molecular weight compound exist with respect to the polymer P. In this specification, the "reaction point" means a group capable of polymerization or a group capable of crosslinking. Specific examples of these groups include groups having a polymerizable double bond such as a (meth)acryloyl group, and crosslinkable functional groups such as an epoxy group and an oxetane group. As an example, when the polymer P is formed of dimethylol-tricyclodecanediacrylate, the value of x ₂ is 2. The number of reaction points may be calculated using software for calculating the molecular descriptor described above.

When the polymer P is formed from a plurality of types of monomers M, the value of x ₂ can be specified by the following method. First, the number of reaction points is computed with respect to each of several types of monomer M. With respect to the calculated number of reaction points, weighted average is performed by assigning weights according to the molar ratio of each monomer M. The obtained weighted average value can be regarded as x ₂ . In this embodiment, the value _of x2 is not specifically limited, For example, it is 1-6.

x ₃ is the polarization term δP (MPa ^1/2 ) in the Hansen solubility parameter of the monomer M for forming the polymer P. x ₃ can be an index for predicting the interaction that occurs between the polymer P and water molecules or iodine. The Hansen solubility parameter is obtained by dividing the solubility parameter introduced by Hildebrand into three components: a dispersion term δD, a polarization term δP, and a hydrogen bonding term δH. The polarization term δP represents energy due to the intermolecular dipole interaction. For details of Hansen solubility parameters, see "Hansen Solubility Parameters; A Users Handbook (CRC Press, 2007). The polarization term (delta)P can be calculated using well-known software, such as HSPiP (version5), for example. In addition, the value of the polarization term (delta)P may differ slightly depending on the software to be used. However, this error is usually negligible in calculating the value of y.

When the polymer P is formed from a plurality of types of monomers M, the value of x ₃ can be specified by the following method. First, for each of the plurality of types of monomers M, the polarization term δP (MPa ^1/2 ) in the Hansen solubility parameter is calculated. The calculated polarization term δP is weighted and averaged by weighting it according to the molar ratio of each monomer M. The obtained weighted average value can be regarded as x ₃ . _In this embodiment, the value of x3 is not specifically limited, For example, it is 1-10 (MPa ^1/2 ). The value of x ₃ is preferably 6 (MPa ^1/2 ) or less, more preferably 5 (MPa ^1/2 ) or less, and still more preferably 4 (MPa ^1/2 ) or less.

The value of y computed by Formula (2) becomes like this. Preferably it is 0.8 or less, More preferably, it is 0.7 or less, More preferably, it is 0.5 or less, Especially preferably, it is 0.3 or less.

The value of y computed by Formula (2) is an index|index regarding the monomer M for forming the polymer P contained in the resin layer (2). However, according to examination of the present inventors, the value of y is useful also as an index|index for selecting the resin layer 2 suitable for suppressing the permeation|transmission of the iodine contained in the polarizer 1 to the outside. The value of y is especially suitable as an index|index for predicting the characteristic of the resin layer containing the polymer which has a structural unit derived from (meth)acrylic acid ester.

[Polarizer]

The polarizer 1 is not particularly limited as long as it contains iodine, and for example, 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. The thing which made iodine adsorb|suck and uniaxially stretched is mentioned. It is preferable that the polarizer 1 is comprised from a polyvinyl alcohol-type film and iodine.

The thickness of the polarizer 1 is not particularly limited, for example, 30 µm or less, preferably 20 µm or less, more preferably 18 µm or less, still more preferably 15 µm or less, particularly preferably is 12 μm or less, particularly preferably 10 μm or less. The thickness of the polarizer 1 may be 2 micrometers or more, 4 micrometers or more may be sufficient as it, and 5 micrometers or more may be sufficient as it. 7-12 micrometers may be sufficient as the thickness of the polarizer 1, and 1-7 micrometers in some cases, especially 4-6 micrometers may be sufficient as it. In this specification, the polarizer 1 whose thickness is 10 micrometers or less may be called thin-shaped polarizer. A thin polarizer tends to have little thickness nonuniformity and to be excellent in visibility. Moreover, a dimensional change is suppressed and the thin polarizer also has the advantage that it is excellent in durability. According to the thin polarizer, the polarizing film 10 can be made thin. When the polarizer 1 is a thin polarizer, in order for the polarizing film 10 to have a polarization degree sufficient for practical use, it is necessary to adjust the density|concentration of the iodine in the polarizer 1 highly. In the polarizing film 10 of this embodiment, even when the thickness of the polarizer 1 is small and the concentration of iodine in the polarizer 1 is high, it can sufficiently suppress that iodine is transmitted from the polarizer 1 to the outside. can

The polarizer 1 can be manufactured by, for example, dyeing a hydrophilic polymer film such as a polyvinyl alcohol-based film by immersing it in an aqueous solution of iodine, and extending it to 3 to 7 times its original length. If necessary, the hydrophilic polymer film may be immersed in an aqueous solution containing boric acid, potassium iodide, or the like. In addition, if necessary, the hydrophilic polymer film may be immersed in water before dyeing and washed with water. By washing the hydrophilic polymer film with water, it is possible to wash the stains and antiblocking agent adhering to the surface. Since the hydrophilic polymer film swells when the hydrophilic polymer film is washed with water, there is also an effect that can suppress unevenness in dyeing. Extending|stretching of a hydrophilic polymer film may be performed after dyeing with iodine, may be performed while dyeing|staining, and may be performed before dyeing with iodine. Stretching of the hydrophilic polymer film may be performed in an aqueous solution containing boric acid, potassium iodide, or the like, or in water.

Typical examples of the thin polarizer include JP-A-51-069644, JP-A-2000-338329, JP-A-2010/100917, JP-A-2014-59328, JP-2012- 73563 etc. are mentioned. These thin polarizers can be manufactured by a manufacturing method comprising a step of stretching a laminate including a polyvinyl alcohol-based resin (PVA-based resin) layer and a resin substrate for stretching, and a step of dyeing the obtained stretched film. . In this manufacturing method, since the PVA-type resin layer is supported by the resin base material for extending|stretching, it is hard to generate|occur|produce defects, such as a fracture|rupture by extending|stretching.

From the viewpoint that the thin polarizer can be stretched at a high magnification and the polarization performance can be improved, it is preferable that the thin polarizer be manufactured by a manufacturing method including a stretching step in an aqueous boric acid solution among the above manufacturing methods, and in particular, boric acid It is preferable to manufacture by the manufacturing method which includes the process of performing auxiliary|assistant aerial stretching before the extending|stretching process in aqueous solution. The manufacturing method including the extending|stretching process in boric-acid aqueous solution is disclosed in International Publication No. 2010/100917, Unexamined-Japanese-Patent No. 2014-59328, Unexamined-Japanese-Patent No. 2012-73563, etc. The manufacturing method including the process of air-stretching is disclosed by Unexamined-Japanese-Patent No. 2014-59328, Unexamined-Japanese-Patent No. 2012-73563, etc.

[resin layer]

The polymer P contained in the resin layer 2 and the resin layer 2 is not specifically limited as long as at least one of the requirements (i)-(v) mentioned above is satisfied. Polymer P contains, for example, a structural unit derived from one monomer selected from the group consisting of radically polymerizable monomers, cationically polymerizable monomers and anionically polymerizable monomers, preferably from a radically polymerizable monomer derived structural units. The polymer P may contain the structural unit derived from a radically polymerizable monomer, and the structural unit derived from a cationically polymerizable monomer.

As a radically polymerizable monomer, (meth)acrylic acid ester and a styrenic compound are mentioned, for example. In this specification, "(meth)acrylic acid" means acrylic acid and/or methacrylic acid.

Monofunctional (meth)acrylic acid ester which has one (meth)acryloyl group may be sufficient as (meth)acrylic acid ester, and polyfunctional (meth)acrylic acid ester which has two or more (meth)acryloyl groups may be sufficient as it. It is preferable that the polymer P contains the structural unit derived from polyfunctional (meth)acrylic acid ester. According to the polymer P containing the structural unit derived from polyfunctional (meth)acrylic acid ester, it exists in the tendency which can suppress more that iodine moves from the polarizer 1 to the resin layer 2. The number of (meth)acryloyl groups contained in polyfunctional (meth)acrylic acid ester is not specifically limited, For example, it is 2-6, Preferably it is 2-4. When there are too many (meth)acryloyl groups contained in polyfunctional (meth)acrylic acid ester, an unreacted (meth)acryloyl group may remain|survive in polymer P.

Carbon number of parts other than the (meth)acryloyl group in (meth)acrylic acid ester (it may call ester part hereafter) is not specifically limited, For example, it is 1-18, Preferably it is 4- 10 is The ester moiety may contain a ring structure. Although the ring structure may contain hetero atoms, such as a nitrogen atom and an oxygen atom, it is preferable that it is comprised only with an alicyclic hydrocarbon. The ring structure may be a condensed ring structure such as tricyclodecane, or a monocyclic structure such as cyclohexane. The ester part may contain functional groups, such as an ether group.

Although (meth)acrylic acid ester may contain a polar group, it is preferable not to contain a polar group. In this specification, a polar group means the group containing the bond of a hydrogen atom, hetero atoms, such as an oxygen atom and a nitrogen atom. As a polar group, a hydroxyl group, a carboxyl group, a primary amine group, and a secondary amine group are mentioned, for example.

As (meth)acrylic acid ester, dicyclopentanyl (meth)acrylate, 4-t- butylcyclohexyl (meth)acrylate, lauryl (meth)acrylate, 5-(meth)acryloxy- 2,6-norbornane carboractone, 3,3,5-trimethylcyclohexyl (meth) acrylate, 4-t-butylphenyl (meth) acrylate, isobornyl (meth) acrylate, 1-a Damantyl (meth) acrylate, 2-adamantyl (meth) acrylate, 2-methyl-2-adamantyl (meth) acrylate, 2-ethyl-2-adamantyl (meth) acrylate, 2 -Isopropyl-2-adamantyl (meth) acrylate, 4-biphenyl (meth) acrylate, 1-naphthyl (meth) acrylate, 2-naphthyl (meth) acrylate, 1-anthracene (meth) ) Monofunctional (meth)acrylic acid esters, such as acrylate, 1-anthracenemethyl (meth)acrylate, and 9-anthracenemethyl (meth)acrylate; Dimethylol-tricyclodecanedi(meth)acrylate, 1,3-adamantanediol di(meth)acrylate, 1,3,5-adamantanetriol-1,5-di(meth)acrylate bifunctional (meth)acrylic acid esters such as , 9,9-bis[4-(2-(meth)acryloyloxyethoxy)phenyl]fluorene; trifunctional (meth)acrylic acid esters such as trimethylolpropane tri(meth)acrylate, glycerin tri(meth)acrylate, and 1,3,5-adamantane triol tri(meth)acrylate; tetrafunctional (meth)acrylic acid esters such as pentaerythritol tetra(meth)acrylate; 6 functional (meth)acrylic acid esters, such as dipentaerythritol hexa (meth)acrylate, etc. are mentioned.

The styrenic compound contains, for example, an aromatic ring and at least one vinyl group. Like (meth)acrylic acid ester, although the styrenic compound may contain the polar group, it is preferable not to contain a polar group. As a styrene-type compound, styrene, (alpha)-methylstyrene, vinylbenzyl chloride, butoxystyrene, vinylpyridine, etc. are mentioned, for example.

It is preferable that the polymer P contains the structural unit derived from a radically polymerizable monomer as a main component, and it is preferable that it consists substantially of the structural unit derived from a radically polymerizable monomer. In the present specification, the "main component" means a structural unit that is contained most in the polymer P on a weight basis. In particular, the polymer P preferably contains a structural unit derived from (meth)acrylic acid ester, and the content thereof is, for example, 50% by weight or more, preferably higher than 70% by weight, more preferably 80 It is weight % or more, More preferably, it is 90 weight% or more, Especially preferably, it is 95 weight% or more, Especially preferably, it is 99 weight% or more.

As a cationically polymerizable monomer, a vinyl ether compound, an epoxy compound, and an oxetane compound are mentioned, for example. Examples of the vinyl ether compound include aliphatic vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether, and cyclohexyl vinyl ether; aromatic vinyl ethers such as phenyl vinyl ether, 2-phenoxyethyl vinyl ether, and p-methoxyphenyl vinyl ether; Polyfunctional vinyl ethers, such as butanediol-1, 4- divinyl ether, triethylene glycol divinyl ether, and dipropylene glycol divinyl ether, etc. are mentioned.

As an epoxy compound, an aromatic epoxy compound, an alicyclic epoxy compound, and an aliphatic epoxy compound are mentioned, for example. As an aromatic epoxy compound, For example, diglycidyl ether compounds of bisphenols, such as bisphenol A, bisphenol F, and bisphenol S (bisphenol-type epoxy resin); novolac-type epoxy resins such as phenol novolac epoxy resins, cresol novolac epoxy resins, and hydroxybenzaldehyde phenol novolac epoxy resins; Glycidyl ether compounds of polyalcohols, such as tetrahydroxyphenylmethane, tetrahydroxybenzophenone, and polyvinylphenol, etc. are mentioned.

Examples of the alicyclic epoxy compound include vinylcyclohexene dioxide, 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, limonene dioxide, and bis(3,4-epoxycyclohexyl). Methyl) adipate, dicyclopentadienediepoxide, bicyclononadienediepoxide, tricyclopentadienediepoxide, dodecahydro-2,6-methano-2H-oxirano[3',4' ]cyclopenta[1',2':6,7]naphth[2,3-b]oxirane etc. are mentioned.

Examples of the aliphatic epoxy compound include 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, glycerol triglycidyl ether, trimethylolpropane triglycidyl ether, and ethylene glycol diglycidyl ether. , propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and the like.

Examples of the oxetane compound include 3-ethyl-3-hydroxymethyloxetane, 1,4-bis[(3-ethyl-3-oxetanyl)methoxymethyl]benzene, 3-ethyl-3-(phenoxy) methyl)oxetane, bis[(3-ethyl-3-oxetanyl)methyl]ether, 3-ethyl-3-(2-ethylhexyloxymethyl)oxetane, etc. are mentioned.

As an anionic polymerizable monomer, (meth)acrylic acid ester is mentioned, for example. As for the (meth)acrylic acid ester as an anion-polymerizable monomer, what was mentioned above as a radically polymerizable monomer can be used.

It is preferable that the polymer P contains the structural unit derived from a polyfunctional monomer. As a polyfunctional monomer, the polyfunctional (meth)acrylic acid ester mentioned above, a polyfunctional vinyl ether compound, a polyfunctional epoxy compound, a polyfunctional oxetane compound etc. are mentioned, for example. The content of the structural unit derived from the polyfunctional monomer in the polymer P is, for example, 20 wt% or more, preferably 40 wt% or more, more preferably 50 wt% or more, and in some cases 70 Weight % or more may be sufficient. The upper limit of the content rate of the structural unit derived from a polyfunctional monomer is not specifically limited, For example, it is 95 weight%.

Although the polymer P may contain the structural unit derived from the monomer which has a polar group, it is preferable not to contain it. When the polymer P contains the structural unit derived from the monomer which has a polar group, there exists a tendency for the iodine contained in the polarizer 1 to approach the resin layer 2 easily. Therefore, the content rate of the structural unit derived from the monomer which has a polar group in polymer P becomes like this. Preferably it is 20 weight% or less, More preferably, it is 10 weight% or less, More preferably, it is 5 weight% or less, Especially preferably, it is 2 weight% or less.

The resin layer 2 contains the polymer P as a main component, for example. The content rate of the polymer P in the resin layer 2 is, for example, 50 weight% or more, Preferably it is 70 weight% or more, More preferably, it is 90 weight% or more, More preferably, it is 95 weight% or more. to be. The resin layer 2, Preferably, consists essentially only of the polymer P. However, the resin layer 2 may contain additives other than the polymer P, such as an antistatic agent, antioxidant, an inorganic particle, and a leveling agent.

The thickness of the resin layer 2 is not specifically limited, For example, it is 10 micrometers or less, Preferably it is 5 micrometers or less, More preferably, it is 3 micrometers or less. It is preferable that the thickness of the resin layer 2 is 0.3 micrometer or more from a viewpoint of fully suppressing permeation|transmission to the outside of the iodine contained in the polarizer 1, and 0.5 micrometer or more may be sufficient as it.

The resin layer 2 may be bonded to the polarizer 1 through an adhesive layer or an easily bonding layer. As an adhesive bond layer for bonding the resin layer 2 to the polarizer 1, what is illustrated with respect to the adhesive bond layer 3 mentioned later is mentioned, for example. The easily adhesive layer is formed of, for example, a resin containing a polymer having a polyester skeleton, a polyether skeleton, a polycarbonate skeleton, a polyurethane skeleton, a silicone system, a polyamide skeleton, a polyimide skeleton, a polyvinyl alcohol skeleton, or the like. can do. One type may be sufficient as the polymer contained in resin, and 2 or more types may be sufficient as it. The easily bonding layer may contain the additive. As an additive, stabilizers, such as a tackifier, a ultraviolet absorber, antioxidant, and a heat-resistant stabilizer, etc. are mentioned. The thickness of an easily bonding layer is not specifically limited, Preferably it is 0.01-5 micrometers, More preferably, it is 0.02-2 micrometers, More preferably, it is 0.05-1 micrometer. The easily bonding layer may be a laminate of a plurality of layers.

[Adhesive layer]

The adhesive bond layer 3 is a layer containing an adhesive agent. The material of the adhesive is not particularly limited, and a known material can be used. As an adhesive agent contained in the adhesive bond layer 3, a water-system adhesive agent and an active energy ray hardening-type adhesive agent are mentioned, for example. As an active energy ray hardening-type adhesive agent, what was disclosed in Unexamined-Japanese-Patent No. 2019-147865, Unexamined-Japanese-Patent No. 2016-177248, etc. can be used, for example.

The thickness of the adhesive bond layer 3 is not specifically limited, For example, it is 3.0 micrometers or less, Preferably it is 0.01-3.0 micrometers, More preferably, it is 0.1-2.5 micrometers, More preferably, it is 0.5-1.5 micrometers. . When the thickness of the adhesive bond layer 3 is too small, the cohesive force of the adhesive bond layer 3 may run short, and peeling force may fall. When the thickness of the adhesive bond layer 3 is too large and stress is applied to the cross section of the polarizing film 10, peeling may arise in the adhesive bond layer 3. That is, in the polarizing film 10, peeling defect by an impact may generate|occur|produce.

[Transparent Protective Film]

The transparent protective film 4 is preferably excellent in transparency, mechanical strength, thermal stability, moisture barrier properties, isotropy, and the like. As a material of the transparent protective film 4, For example, Polyester-type polymers, such as a polyethylene terephthalate and a polyethylene naphthalate; Cellulose polymers, such as a diacetyl cellulose and a triacetyl cellulose; (meth)acrylic polymers, such as polymethyl methacrylate; Styrenic polymers, such as polystyrene and an acrylonitrile-styrene copolymer (AS resin); Polycarbonate-type polymer; olefinic polymers such as polyethylene, polypropylene, and ethylene/propylene copolymer; Cyclic olefin polymers, such as polynorbornene; vinyl chloride polymer; amide-based polymers such as nylon and aromatic polyamide; imide-based polymers; sulfone-based polymers; Polyether sulfone-type polymer; Polyether ether ketone type polymer; Polyphenylene sulfide-type polymer; vinyl alcohol-based polymers; vinylidene chloride polymer; vinyl butyral polymer; arylate-based polymers; polyoxymethylene-based polymers; Epoxy polymer; A mixture of these polymers, etc. are mentioned.

It is preferable that the transparent protective film 4 contains the polymer which functions as a thermoplastic resin among the above-mentioned polymers. The content of the thermoplastic resin in the transparent protective film 4 is preferably 50 wt% to 100 wt%, more preferably 50 wt% to 99 wt%, still more preferably 60 wt% to 98 wt% %, and particularly preferably 70% by weight to 97% by weight. When the content rate of the thermoplastic resin in the transparent protective film 4 is less than 50 weight%, functions, such as high transparency which a thermoplastic resin originally has, may not fully express.

The transparent protective film may contain one or more types of additives. As an additive, a ultraviolet absorber, antioxidant, a lubricant, a plasticizer, a mold release agent, a coloring inhibitor, a flame retardant, a nucleating agent, an antistatic agent, a pigment, a coloring agent etc. are mentioned, for example.

The polymer film of Unexamined-Japanese-Patent No. 2001-343529, International Publication No. 01/37007, etc. may be sufficient as the transparent protective film 4. As a material for this polymer film, for example, a thermoplastic resin having a substituted and/or unsubstituted imide group in the side chain, a thermoplastic resin having a substituted and/or unsubstituted phenyl group in the side chain, and a nitrile group. A resin composition is mentioned. As a specific example of this polymer film, the film formed from the resin composition containing the alternating copolymer which consists of isobutylene and N-methylmaleimide, and an acrylonitrile-styrene copolymer is mentioned. This film is obtained by mixing-extruding a resin composition, for example. Since this film has a small retardation and a small photoelastic coefficient, problems, such as nonuniformity by the deformation|transformation of the polarizing film 10, can be eliminated. Moreover, since this film has a small moisture permeability, it is excellent in durability in a high-humidity environment.

Although the water vapor transmission rate of the transparent protective film 4 is not specifically limited, It is preferable that it is 150 g/m<2>/24h or less. In this case, it can suppress that the water|moisture content in air penetrate|invades the inside of the polarizing film 10, and the change of the moisture content of the polarizing film 10 can be suppressed. Thereby, at the time of a preservation|save etc. WHEREIN: Generation|occurrence|production of the curl of the polarizing film 10 and a dimensional change can be suppressed. Examples of the material for forming the transparent protective film 4 with low moisture permeability include a polyester-based polymer, a polycarbonate-based polymer, an arylate-based polymer, an amide-based polymer, an olefin-based polymer, a cyclic olefin-based polymer, ( meth)acrylic polymers, and mixtures thereof. As a material which forms the transparent protective film 4, a polycarbonate type polymer, a cyclic olefin type polymer, and a (meth)acrylic type polymer are preferable, and a cyclic olefin type polymer and a (meth)acrylic type polymer are especially preferable.

Although the thickness of the transparent protective film 4 is not specifically limited, From a viewpoint of intensity|strength, handleability, etc., 5-100 micrometers is preferable, 10-60 micrometers is more preferable, 13-40 micrometers is still more preferable.

In order to improve the adhesiveness between members, the surface of the transparent protective film 4 may be given easy adhesion processing, such as a corona treatment and a plasma processing. On the surface of the transparent protective film 4, the easily bonding layer may be arrange|positioned. As an easily bonding layer, what was mentioned above about the resin layer 2 can be used.

[Adhesive layer]

The adhesive layer 5 is a layer containing an adhesive. The material of the pressure-sensitive adhesive is not particularly limited, and for example, those containing (meth)acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyethers, fluorine-based polymers, rubber-based polymers, etc. can be used as the base polymer. have. In particular, the acrylic pressure-sensitive adhesive containing a (meth)acrylic polymer is excellent in optical transparency, has adhesive properties such as appropriate wettability, cohesiveness, and adhesiveness, and is excellent in weather resistance and heat resistance, so the material of the pressure-sensitive adhesive layer (5) suitable for

The pressure-sensitive adhesive layer 5 may be a laminate of a plurality of layers having different compositions. The thickness of the pressure-sensitive adhesive layer 5 is appropriately determined according to the purpose of use, adhesive strength, and the like, and is, for example, from 1 to 500 µm, preferably from 1 to 200 µm, and more preferably from 1 to 100 µm. The thickness of the adhesive layer 5 may be 50 micrometers or less.

Before the polarizing film 10 is bonded to an image display panel, the adhesive layer 5 may be bonded together with a separator. According to the separator, contamination of the pressure-sensitive adhesive layer 5 can be prevented. As the separator, for example, for thin films such as plastic film, rubber sheet, paper, cloth, nonwoven fabric, net, foam sheet, metal foil, and laminates thereof, silicone-based, long-chain alkyl-based, fluorine-based, What was coated with a release agent, such as molybdenum sulfide, can be used.

[Other Absence]

The polarizing film 10 may further be equipped with other members other than the member mentioned above. The polarizing film 10 may further be equipped with the transparent substrate located in the visual recognition side rather than the resin layer 2, for example. The transparent substrate may be located at the outermost side of the polarizing film 10 . A transparent substrate is comprised from glass or a polymer, for example. Examples of the polymer constituting the transparent substrate include polyethylene terephthalate, polycycloolefin, and polycarbonate. The thickness of the transparent substrate comprised from glass is 0.1 mm - 1 mm, for example. The thickness of the transparent substrate comprised of a polymer is 10 micrometers - 200 micrometers, for example.

A transparent substrate is bonded with the resin layer 2 via an OCA (optical clear adhesive) layer, for example. As an OCA layer, what was mentioned above about the adhesive layer 5 can be used, for example. It is preferable that the thickness of an OCA layer is 150 micrometers or less.

The polarizing film 10 may further be equipped with optical films, such as a reflecting plate, a transflective plate, retardation film, a viewing angle compensation film, and a brightness improvement film. The retardation film includes, for example, a 1/2 wave plate, a 1/4 wave plate, and the like. In the polarizing film 10, the retardation film may be disposed on the image display panel side (for example, between the pressure-sensitive adhesive layer 5 and the transparent protective film 4) rather than the polarizer 1, and the polarizer 1 You may arrange|position more on the visual recognition side.

The polarizing film 10 may further be equipped with functional layers, such as a hard-coat layer, a reflection prevention layer, a sticking prevention layer, a diffusion layer, and an anti-glare layer. In the polarizing film 10, the hard-coat layer may be arrange|positioned rather than the resin layer 2 on the visual recognition side.

[Method for producing polarizing film]

The polarizing film 10 can be manufactured by the following method, for example. First, the polarizer 1 and the transparent protective film 4 are bonded together via the adhesive bond layer 3 . Next, the coating liquid containing the monomer M for forming the polymer P and a polymerization initiator is prepared. A polymerization initiator can be suitably selected according to the monomer M contained in a coating liquid. As an example, when the coating liquid contains a radically polymerizable monomer, a photopolymerization initiator may be used as the polymerization initiator. When a coating liquid contains a cationically polymerizable monomer, a photo-acid generator can be used as a polymerization initiator.

As a photoinitiator, For example, Benzophenone type compounds, such as benzyl, benzophenone, benzoyl benzoic acid, 3,3'- dimethyl-4- methoxybenzophenone; 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone, α-hydroxy-α, α'-dimethylacetophenone, 2-methyl-2-hydroxypropiophenone, α - Aromatic ketone compounds, such as hydroxycyclohexylphenyl ketone; Methoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxyacetophenone, 2-methyl-1-[4-(methylthio)-phenyl]-2-morpholinopropane acetophenone-based compounds such as -1-one; benzoin ether compounds such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, and anisoin methyl ether; aromatic ketal compounds such as benzyl dimethyl ketal; aromatic sulfonyl chloride compounds such as 2-naphthalenesulfonyl chloride; photoactive oxime compounds such as 1-phenone-1,1-propanedione-2-(o-ethoxycarbonyl)oxime; Thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone thioxanthone-based compounds such as xanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone; camphorquinone; halogenated ketones; Acyl phosphine oxide; Acyl phosphonate, etc. are mentioned.

As a photo-acid generator, the compound represented by following formula (i) is mentioned, for example.

L ⁺ X ^- (i)

In formula (i), L ⁺ is onium cation, X ^- is PF ₆ ^- , SbF ₆ ^- , AsF ₆ ^- , SbCl ₆ ^- , BiCl ₅ ^- , SnCl ₆ ^- , ClO ₄ ^- , dithio It is a counter anion selected from the group consisting of carbamate anion and ^SCN- .

As a specific example of a photo-acid generator, For example, "Cyracure UVI-6992", "Cyracure UVI-6974" (above, manufactured by Dow Chemical Japan Co., Ltd.), "Adeca Optomer SP150", " Adeca Optomer SP152", "Adeka Optomer SP170", "Adeca Optomer SP172" (above, manufactured by ADEKA Co., Ltd.), "IRGACURE250" (Ciba Specialty Chemicals), "CI-5102", "CI- 2855" (above, manufactured by Nippon Soda), "San-Aid SI-60L", "San-Aid SI-80L", "San-Aid SI-100L", "San-Aid SI-110L", "San-Aid SI-180L" (above, manufactured by Sanshin Chemical), "CPI-100P", "CPI-100A" (above, manufactured by San Apro Corporation), "WPI-069", "WPI-113", "WPI-116", "WPI-041" ', "WPI-044", "WPI-054", "WPI-055", "WPAG-281", "WPAG-567", "WPAG-596" (above, manufactured by Wako Pure Chemical Industries, Ltd.).

The content rate of the polymerization initiator in the coating liquid is, for example, 20 wt% or less, preferably 0.01 to 20 wt%, more preferably 0.05 to 10 wt%, still more preferably 0.1 to 5 wt% to be.

Next, a coating liquid is apply|coated on the polarizer 1 . Thereby, the film|membrane (coating film) containing the monomer M and a polymerization initiator can be formed on the polarizer 1 . Next, the monomer M is polymerized so that the resin layer 2 may be formed from the coating film. Superposition|polymerization of the monomer M can be performed by a well-known method. For example, when using a photoinitiator or a photo-acid generator as a polymerization initiator, the monomer M can be superposed|polymerized by irradiating an active energy ray to a coating film. As an active energy ray, visible light and an ultraviolet-ray are mentioned, for example. In this specification, the resin layer 2 manufactured by superposing|polymerizing the monomer M contained in a coating film may be called a cured resin layer. Next, the polarizing film 10 is obtained by bonding the adhesive layer 5 together to the transparent protective film 4 .

The resin layer 2 may be manufactured by the following method. First, the monomer M is polymerized, and the polymer P is obtained. The obtained polymer P is added to a solvent, and a coating liquid is manufactured. As a solvent, the organic solvent which can melt|dissolve or disperse|distribute the polymer P is mentioned, for example. Next, a coating film is manufactured by apply|coating a coating liquid on the polarizer 1. By drying the coating film, the resin layer (2) is obtained.

[Characteristics of polarizing film]

In the polarizing film 10 of the present embodiment, since at least one of the above requirements (i) to (v) is satisfied, in a high-temperature and high-humidity environment, permeation of the iodine contained in the polarizer 1 to the outside is sufficiently restrained. That is, in a high-temperature and high-humidity environment, the density|concentration of the iodine in the polarizer 1 hardly changes. The change of the density|concentration of the iodine in the polarizer 1 can be read from the change of the single transmittance of the polarizing film 10, for example. As an example, in the state which bonded the polarizing film 10 to alkali-free glass through the adhesive layer 5, when putting the polarizing film 10 in the atmosphere of 65 degreeC 90%RH for 24 hours, the polarizing film 10 ), change ΔY1 in single transmittance is, for example, 5 or less, preferably 4 or less, more preferably 2 or less, still more preferably 1.5 or less, and particularly preferably 1 or less.

The change ΔY1 of the single transmittance can be specifically measured by the following method. First, the single transmittance|permeability Ts1 of the laminated body obtained by bonding the polarizing film 10 to an alkali free glass through the adhesive layer 5 is measured. Next, this laminated body is set|placed in the atmosphere of 65 degreeC 90 %RH for 24 hours. The single transmittance Ts2 is measured for the laminate after being placed in this atmosphere. The value obtained by subtracting the single transmittance Ts1 from the single transmittance Ts2 is regarded as the change ΔY1 of the single transmittance. In addition, the single transmittance of a laminated body is the Y value which performed visibility correction|amendment by the 2 degree field of view (C light source) of JISZ8701-1999. A single transmittance can be measured using commercially available spectrophotometers, such as DOT-3 by Murakami Color Technology Research Institute. The measurement wavelength of the single transmittance|permeability is 380-700 nm (every 10 nm). Alkali-free glass is glass which does not contain an alkali component (alkali metal oxide) substantially, Specifically, the weight ratio of the alkali component in glass is 1000 ppm or less, Furthermore, it is 500 ppm or less. . Alkali-free glass is plate-shaped, for example, and has thickness 0.5 mm or more.

The single transmittance Ts1 is not particularly limited, and is, for example, 42% to 46%, preferably 43% or more, and more preferably 44% or more. The single transmittance Ts2 is not particularly limited, and is, for example, 42% to 48%, preferably 47% or less, and more preferably 46% or less.

(Modified example of polarizing film)

In the polarizing film 10, the resin layer 2 may be located in the image display panel side mentioned later rather than the polarizer 1. As shown in FIG. 2, in the polarizing film 11 which concerns on this modification, the resin layer 2 is located rather than the polarizer 1 on the image display panel side. Except for the position of the resin layer 2 , the structure of the polarizing film 11 is the same as that of the polarizing film 10 . Therefore, the same reference code|symbol is attached|subjected to the element common in the polarizing film 10 and the polarizing film 11 of a modification, and those descriptions may be abbreviate|omitted. That is, the description regarding each embodiment below is applied to each other unless there is a technical contradiction. Each of the following embodiments may be combined with each other as long as there is no technical contradiction.

The resin layer 2 is located between the polarizer 1 and the adhesive bond layer 3, for example, and is in direct contact with each of the polarizer 1 and the adhesive bond layer 3, for example. However, between the resin layer 2 and the polarizer 1, other layers, such as an adhesive bond layer and an easily bonding layer, may be arrange|positioned. For example, the resin layer 2 may be bonded to the polarizer 1 through an adhesive bond layer or an easily bonding layer. As an adhesive bond layer for bonding the resin layer 2 to the polarizer 1, and an easily bonding layer, what was mentioned above about the polarizing film 10 is mentioned. When the resin layer 2 is located on the image display panel side rather than the polarizer 1, in a high-temperature and high-humidity environment, the iodine contained in the polarizer 1 moves to the pressure-sensitive adhesive layer 5, and the pressure-sensitive adhesive layer 5 It is possible to suppress transmission to the outside of the polarizing film 11 through the.

(Another modification of the polarizing film)

The polarizing film 10 may further be equipped with other members other than the member mentioned above. As shown in FIG. 3 , the polarizing film 12 according to the present modification further includes a transparent protective film (a second transparent protective film) 6 . Except for the second transparent protective film 6 , the structure of the polarizing film 12 is the same as that of the polarizing film 10 . Therefore, the same reference code|symbol is attached|subjected to the element common in the polarizing film 10 and the polarizing film 12 of a modification, and those descriptions may be abbreviate|omitted.

The 2nd transparent protective film 6 is located on the visual recognition side rather than the polarizer 1 . The polarizer 1 is positioned between the first transparent protective film 4 and the second transparent protective film 6 , for example. The 2nd transparent protective film 6 is located in the visual recognition side rather than the resin layer 2, and the outermost of the polarizing film 12, for example. However, when the polarizing film 12 is equipped with the transparent substrate mentioned above, the 2nd transparent protective film 6 may be located between the resin layer 2 and a transparent substrate. The 2nd transparent protective film 6 is in direct contact with the resin layer 2, for example. However, the 2nd transparent protective film 6 may be bonded to the resin layer 2 through other layers, such as an adhesive bond layer and a hard-coat layer. As an adhesive bond layer for bonding the 2nd transparent protective film 6 to the resin layer 2, what was mentioned above about the adhesive bond layer 3 is mentioned, for example.

As the 2nd transparent protective film 6, what was mentioned above about the 1st transparent protective film 4 can be used. The first transparent protective film 4 and the second transparent protective film 6 may be the same as or different from each other.

In the polarizing film 12 provided with the 2nd transparent protective film 6, in a high-temperature and high-humidity environment, there exists a tendency for permeation|transmission to the outside of the iodine contained in the polarizer 1 to be suppressed more. As an example, in the state which bonded the polarizing film 12 to alkali-free glass through the adhesive layer 5, when putting the polarizing film 12 in the atmosphere of 65 degreeC 90%RH for 120 hours, the polarizing film 12 The change ΔY2 of the single transmittance of ) is, for example, 3 or less, preferably 2 or less, more preferably 1.5 or less, still more preferably 1 or less, particularly preferably 0.8 or less.

The change ΔY2 of the single transmittance can be specifically measured by the following method. First, the single transmittance|permeability Ts3 of the laminated body obtained by bonding the polarizing film 12 to an alkali free glass through the adhesive layer 5 is measured. Next, this laminated body is set|placed in the atmosphere of 65 degreeC 90%RH for 120 hours. The single transmittance Ts4 is measured for the laminate after being placed in this atmosphere. The value obtained by subtracting the single transmittance Ts3 from the single transmittance Ts4 is regarded as the change ΔY2 of the single transmittance.

The single transmittance Ts3 is not particularly limited, and is, for example, 42% to 46%, preferably 43% or more, and more preferably 44% or more. The single transmittance Ts4 is not particularly limited, and is, for example, 42% to 48%, preferably 47% or less, and more preferably 46% or less.

(Another variation of polarizing film)

The polarizing film 10 may be equipped with the two or more resin layers 2 . As shown in FIG. 4, the polarizing film 13 which concerns on this modification is equipped with two resin layers 2a and 2b. Except for the resin layer 2b , the structure of the polarizing film 13 is the same as that of the polarizing film 10 . Therefore, the same reference code|symbol is attached|subjected to the element common in the polarizing film 10 and the polarizing film 13 of a modification, and those descriptions may be abbreviate|omitted.

In the polarizing film 13, the polarizer 1 is located between the two resin layers 2a and 2b. In detail, the resin layer 2b is located rather than the polarizer 1 on the image display panel side (for example, between the polarizer 1 and the adhesive bond layer 3). When the polarizer 1 is arrange|positioned between the two resin layers 2a and 2b, in the polarizing film 13, there exists a tendency for permeation|transmission to the outside of the iodine contained in the polarizer 1 to be suppressed more.

The resin layer 2b may be in direct contact with the polarizer 1 . However, between the resin layer 2b and the polarizer 1, other layers, such as an adhesive bond layer and an easily bonding layer, may be arrange|positioned. For example, the resin layer 2b may be bonded to the polarizer 1 through an adhesive bond layer or an easily bonding layer. As an adhesive bond layer for bonding the resin layer 2b together to the polarizer 1, and an easily bonding layer, what was mentioned above about the polarizing film 10 is mentioned.

(Embodiment of image display device)

As shown in FIG. 5 , the image display device 100 of the present embodiment includes a polarizing film 10 and an image display panel 20 . In the image display apparatus 100, instead of the polarizing film 10, the polarizing film 11, 12, or 13 can also be used. In the image display device 100 , the polarizing film 10 is bonded to the image display panel 20 via the pressure-sensitive adhesive layer 5 , for example. As the image display panel 20, an organic electroluminescent display panel, a liquid crystal display panel, etc. are mentioned, Preferably it is an organic electroluminescent display panel.

The image display device 100 further includes, for example, an illumination system (not shown). As an example, the polarizing film 10, the image display panel 20, and the lighting system are arranged in this order, and the polarizing film 10 is located most on the viewing side. The lighting system has, for example, a backlight or a reflecting plate, and irradiates light to the image display panel 20 .

Example

Hereinafter, the present invention will be described in more detail by way of Examples. This invention is not limited to the Example shown below.

<Thin polarizer>

First, a laminate in which a PVA layer having a thickness of 9 μm was formed on an amorphous polyethylene terephthalate (PET) substrate was prepared. About this laminated body, the extending|stretching laminated body was manufactured by performing aerial auxiliary extending|stretching at the extending|stretching temperature of 130 degreeC. Next, the stretched laminate was dyed using iodine to obtain a colored laminate. Furthermore, with respect to the colored laminate, by extending|stretching at the extending|stretching temperature 65 degreeC in boric-acid aqueous solution, the laminated body in which the amorphous PET base material and the PVA layer were extended|stretched integrally was obtained. In the laminate, the total draw ratio was 5.94 times, and the thickness of the PVA layer was 5 µm. The PVA molecules of the PVA layer formed on the amorphous PET substrate by the above two-stage stretching were highly oriented. In addition, iodine adsorbed by dyeing was highly oriented in one direction as a polyiodine ion complex. The PVA layer contained in the laminated body functioned as a thin polarizer.

<Transparent protective film>

First, by the method described in Production Example 1 of Japanese Patent Application Laid-Open No. 2010-284840, a resin composed of imidized methyl methacrylate-styrene copolymer (imidized MS resin) was prepared. Next, using a twin-screw kneader, 100 parts by weight of the imidized MS resin and 0.62 parts by weight of a triazine-based ultraviolet absorber (manufactured by ADEKA, trade name: T-712) were mixed at 220° C. to prepare resin pellets. The obtained resin pellet was dried in the environment of 100.5 kPa and 100 degreeC for 12 hours. Next, a 160-micrometer-thick film was manufactured by extruding resin pellets from T-die at the die temperature of 270 degreeC using the single screw extruder. Furthermore, about this film, it extended|stretched in the 150 degreeC atmosphere in the conveyance direction, and adjusted thickness to 80 micrometers. Next, after apply|coating the easy adhesion agent containing an aqueous urethane resin to a film, the 40-micrometer-thick transparent protective film was obtained by extending|stretching a film in a 150 degreeC atmosphere in the direction orthogonal to a conveyance direction. The water vapor transmission rate of this transparent protective film was 58 g/m<2>/24h.

<Active energy ray-curable adhesive composition>

12 parts by weight of hydroxyethylacrylamide (manufactured by KJ Chemicals, trade name: HEAA), 24 parts by weight of 2-hydroxy-3-phenoxypropyl acrylate (manufactured by Toa Synthesis, trade name: ARONIX M-5700), 12 parts by weight Hydroxypivalate neopentyl glycol acrylic acid adduct (manufactured by Kyoeisha Chemical, trade name: light acrylate HPP-A), 38 parts by weight of 1,9-nonanediol diacrylate (manufactured by Kyoeisha Chemical, trade name: light acrylic) rate 1,9ND-A), 10 parts by weight of an acrylic oligomer (manufactured by Toa Synthesis, trade name: ARUFON UP-1190), 3 parts by weight of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropane- 1-on (manufactured by IGM Resins, trade name: OMNIRAD 907) and 2 parts by weight of 2,4-diethylthioxanthone (manufactured by Nippon Kayaku Co., Ltd., trade name: KAYACURE DETX-S) were mixed and stirred for 3 hours to activate An energy ray-curable adhesive composition was obtained.

<Laminate body including transparent protective film, adhesive layer, and thin polarizer>

Using an MCD coater manufactured by Fuji Machinery Co., Ltd. (cell shape: honeycomb, gravure roll line: 1000 pieces/inch, rotation speed 140%/line speed), the active energy ray-curable adhesive composition is transparently protected It coated on the bonding surface of the film. The thickness of the obtained coating film was 0.7 micrometer. Next, the laminated body containing a transparent protective film and a PVA layer was bonded together using the roll machine. At this time, the coating film and the PVA layer were brought into contact. The line speed of the roll machine was 25 m/min. Next, about the obtained laminated body, the active energy ray was irradiated from the transparent protective film side. As the active energy ray, visible ray emitted from a visible ray irradiation device (Light HAMMER10 manufactured by Fusion UV Systems) was used. The light source of the visible light irradiation apparatus was a gallium-encapsulated metal halide lamp. In the visible light irradiation apparatus, a V valve was used as the valve. The peak illuminance of the light emitted from the visible light irradiation device was 1600 mW/cm 2 . In the wavelength range of 380 nm to 440 nm, the cumulative irradiation amount of the light emitted from the visible light irradiation device was 1000 mJ/cm 2 . The illuminance of the light emitted from the visible light irradiation device was measured using a Sola-Check system manufactured by Solatell. By irradiating an active energy ray to a laminated body, the active energy ray hardening-type adhesive composition in a coating film hardened|cured. Next, the laminated body a containing a transparent protective film, an adhesive bond layer, and a thin-shaped polarizer was obtained by performing hot air drying at 70 degreeC for 3 minute(s) with respect to this laminated body.

[Example 1]

(polarizing film A)

First, 50 parts by weight of dicyclopentanyl acrylate (manufactured by Hitachi Chemical Co., Ltd., trade name: Pancryl FA-513AS), 50 parts by weight of dimethylol-tricyclodecane diacrylate (manufactured by Kyoeisha Chemical, trade name: light acrylate DCP) -A), 2 parts by weight of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one (manufactured by IGM Resins, trade name: OMNIRAD 907) and 2 parts by weight of 2,4- Diethyl thioxanthone (manufactured by Nippon Kayaku Co., Ltd., trade name: KAYACURE DETX-S) was mixed to prepare a coating solution.

Next, from the laminate a, the amorphous PET substrate adjacent to the PVA layer was removed. Using Select Roller #0 (manufactured by OSG System Products Co., Ltd.), the above-mentioned coating liquid was applied on the exposed PVA layer. The thickness of the obtained coating film was 1 micrometer. Next, the monomer was polymerized by irradiating the coating film with visible light under a nitrogen stream using the above-described visible light irradiation apparatus. By polymerization of the monomer, the coating film was cured and a resin layer was formed.

Next, the surface of the transparent protective film was corona-treated. A 20-micrometer-thick adhesive layer was pasted together on this surface. The adhesive layer was comprised by the acrylic adhesive. Thereby, the polarizing film A provided with the resin layer, a polarizer, an adhesive bond layer, a transparent protective film, and an adhesive layer in this order was obtained.

(polarizing film B)

First, the coating liquid was manufactured by the method similar to the polarizing film A. Using an MCD coater (cell shape: honeycomb, gravure roll number: 700 pieces/inch, rotation speed 140%/line speed) manufactured by Fuji Machinery, a 20 µm-thick triacetyl cellulose (TAC) film was glued together. A coating liquid was applied to the surface. The thickness of the obtained coating film was 1 micrometer. Next, from the laminate a, the amorphous PET substrate adjacent to the PVA layer was removed. The TAC film and the laminated body a were bonded together using the roll machine. At this time, the coating film and the PVA layer were brought into contact. The line speed of the roll machine was 25 m/min. Next, about the obtained laminated body, the active energy ray was irradiated from the TAC film side. As an active energy ray, the visible ray radiated|emitted from the above-mentioned visible ray irradiation apparatus was used. By irradiating the laminate with an active energy ray, the monomer in the coating film was polymerized. The coating film was cured by polymerization of the monomer. Next, about this laminated body, hot air drying was performed at 70 degreeC for 3 minute(s). Thereby, the resin layer was formed.

Next, corona-treated with respect to the surface of the transparent protective film containing imidation MS resin. A 20-micrometer-thick adhesive layer was pasted together on this surface. The adhesive layer was comprised by the acrylic adhesive. Thereby, a polarizing film B comprising a TAC film (second transparent protective film), a resin layer, a polarizer, an adhesive layer, a transparent protective film (first transparent protective film) containing an imidized MS resin, and an adhesive layer in this order got it

[Example 2-10 and Comparative Example 1]

Polarizing films A and B of Examples 2-10 and Comparative Example 1 were prepared in the same manner as in Example 1, except that the monomer contained in the coating liquid for forming the resin layer was changed to the monomer shown in Table 1. prepared.

[Comparative Example 2]

Polarizing films A and B of Comparative Example 2 were manufactured by the method similar to Example 1 except having used the photocurable resin composition B as a coating liquid for forming a resin layer. In addition, the photocurable resin composition B contains 12 parts by weight of hydroxyethyl acrylamide (manufactured by KJ Chemicals, trade name: HEAA), and 20 parts by weight of 2-hydroxy-3-phenoxypropyl acrylate (manufactured by Toa Synthesis, trade name: ARONIX M-5700), 12 parts by weight of hydroxypivalate neopentyl glycol acrylic acid adduct (manufactured by Kyoeisha Chemical, trade name: Light Acrylate HPP-A), 34 parts by weight of 1,9-nonanediol diacrylate (Kyoeisha Chemical) Aisha Chemicals, trade name: Light acrylate 1,9ND-A), 10 parts by weight of acrylic oligomer (Toa Synthetic, trade name: ARUFON UP-1190), 5 parts by weight of diethylacrylamide (KJ Chemicals, trade name: DEAA), 3 parts by weight of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one (manufactured by IGM Resins, trade name: OMNIRAD 907) and 3 parts by weight of 2,4-di It was a mixture of ethyl thioxanthone (the Nippon Kayaku company make, brand name: KAYACURE DETX-S).

[Comparative Example 3]

Polarizing films A and B of Comparative Example 3 were manufactured by the method similar to Example 1 except having used the photocurable resin composition A as a coating liquid for forming a resin layer. The photocurable resin composition A contains 43 parts by weight of acryloylmorpholine (manufactured by KJ Chemicals, trade name: ACMO), and 29 parts by weight of 1,9-nonanediol diacrylate (manufactured by Kyoeisha Chemicals, trade name: light acrylate). 1,9ND-A), 14 parts by weight of phenoxydiethylene glycol acrylate (manufactured by Kyoeisha Chemical, trade name: light acrylate P2H-A), 10 parts by weight of acrylic oligomer (manufactured by Toa Synthetic, trade name: ARUFON UP-1190) , 2 parts by weight of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one (manufactured by IGM Resins, trade name: OMNIRAD 907) and 2 parts by weight of 2,4-diethylthi It was a mixture of oxanthone (made by Nippon Kayaku Co., Ltd., trade name: KAYACURE DETX-S).

<Change in single transmittance ΔY1>

About the polarizing film A of an Example and a comparative example, change (DELTA)Y1 of the single transmittance was measured with the following method. First, the polarizing film A was bonded to alkali free glass through an adhesive layer. About the obtained laminated body, the single transmittance Ts1 was measured. The single transmittance Ts1 was measured using a spectral transmittance measuring instrument with an integrating sphere (Dot-3c manufactured by Murakami Color Technology Research Institute). Next, this laminated body was set|placed in the atmosphere of 65 degreeC 90%RH for 24 hours. About the laminated body after putting in this atmosphere, the said spectral transmittance|permeability measuring instrument was used and the single transmittance Ts2 was measured. The change ΔY1 of the single transmittance was calculated by subtracting the single transmittance Ts1 from the single transmittance Ts2.

<Change in single transmittance ΔY2>

About the polarizing film B of an Example and a comparative example, change (DELTA)Y2 of the single transmittance was measured with the following method. First, the polarizing film B was bonded to alkali free glass through an adhesive layer. About the obtained laminated body, the single transmittance Ts3 was measured. The single transmittance Ts3 was measured using a spectral transmittance measuring instrument equipped with an integrating sphere (Dot-3c manufactured by Murakami Color Research Institute). Next, this laminated body was put in the atmosphere of 65 degreeC 90%RH for 120 hours. About the laminated body after setting it in this atmosphere, single transmittance Ts4 was measured using said spectral transmittance|permeability measuring instrument. The change ΔY2 of the single transmittance was calculated by subtracting the single transmittance Ts3 from the single transmittance Ts4.

<Tensile storage modulus E1 and E2>

For the resin layers used in Examples and Comparative Examples, tensile storage modulus E1 and E2 were measured by the method described above. As a dynamic viscoelasticity measuring apparatus, the TA Instruments dynamic viscoelasticity measuring apparatus RSA-G2 was used.

<Coefficients of linear expansion α1 and α2>

For the resin layers used in Examples and Comparative Examples, coefficients of linear expansion α1 and α2 were measured by the method described above. As the thermomechanical analyzer, a thermomechanical analyzer TMA 4000 SE manufactured by NETZSCH was used.

<Dipole moment D>

With respect to the monomer contained in the coating liquid for forming the resin layer used in the Example and the comparative example, the dipole moment D was computed by the method mentioned above. Materials Studio (manufactured by BIOVIA, ver.8.0.0.843) and WebMO (ver.19.0.009e) were used for calculation of the dipole moment D.

In addition, the abbreviation in Table 1 is as follows.

FA513AS: dicyclofentanyl acrylate, manufactured by Hitachi Chemical

TBCHA: 4-t-butylcyclohexyl acrylate, manufactured by KJ Chemicals

L-A: Lauryl acrylate, manufactured by Kyoeisha Chemical

ACMO: Acryloylmorpholine, manufactured by KJ Chemicals

DCP-A: dimethylol-tricyclodecane diacrylate, manufactured by Kyoeisha Chemical

TMP-A: Trimethylolpropane triacrylate, manufactured by Kyoeisha Chemical

PE-4A: pentaerythritol tetraacrylate, manufactured by Kyoeisha Chemical

DPE-6A: dipentaerythritol hexaacrylate, manufactured by Kyoeisha Chemical

1,9ND-A: 1,9-nonanediol diacrylate, manufactured by Kyoeisha Chemical

As Table 1 shows, in the polarizing film A of the Example in which at least one is established among the requirements (i)-(v), the change ΔY1 of the single transmittance is 5 or less, and the outside of iodine in a high-temperature and high-humidity environment Permeation into the furnace was sufficiently suppressed. Similarly, in the polarizing film B of an Example, change (DELTA)Y2 of single transmittance was 3 or less, and the permeation|transmission to the outside of the iodine in a high-temperature and high-humidity environment was fully suppressed. On the other hand, in the polarizing films A and B of the comparative example in which neither of the requirements (i) to (v) are satisfied, compared with the Example, the change of the single transmittance|permeability is large, and the permeation|transmission of iodine to the outside in a high-temperature and high-humidity environment is could not be suppressed enough.

The polarizing film of this invention is a mobile display, such as a mobile phone, a smart phone, and a notebook computer, for example; It can be used suitably for in-vehicle displays, such as a panel for car navigation apparatuses, a cluster panel, and a mirror display.

Claims (14)

A polarizer containing iodine;
A resin layer comprising a polymer is provided,
The polarizing film in which at least 1 is established among following requirements (i)-(v).
(i) The tensile storage elastic modulus E1 of the said resin layer in 65 degreeC in water is 1x10< ⁸ >Pa or more.
(ii) The tensile storage elastic modulus E2 of the said resin layer in 85 degreeC in water is 1x10< ⁸ >Pa or more.
(iii) The coefficient of linear expansion α1 of the resin layer when the resin layer is heated from 25°C to 65°C and the measurement atmosphere is further humidified from 10%RH to 90%RH is 400×10 ^-6 /K is below.
(iv) When the resin layer is heated from 25°C to 85°C and the measurement atmosphere is further humidified from 10%RH to 85%RH, the coefficient of linear expansion α2 of the resin layer is 300×10 ^-6 /K is below.
(v) the dipole moment D of the monomer for forming the polymer is 2 Debye or less. The method of claim 1,
The polarizing film, wherein the coefficient of linear expansion α1 of the resin layer is 180 × 10 ^-6 /K or less. 3. The method according to claim 1 or 2,
The polarizing film in which the said polymer contains the structural unit derived from (meth)acrylic acid ester. 4. The method of claim 3,
The polarizing film whose content rate of the said structural unit derived from the said (meth)acrylic acid ester in the said polymer is higher than 70 weight%. 5. The method according to any one of claims 1 to 4,
The polarizing film, wherein the polymer comprises a structural unit derived from a polyfunctional monomer. 6. The method of claim 5,
The polarizing film whose content rate of the said structural unit derived from the said polyfunctional monomer in the said polymer is 20 weight% or more. 7. The method according to any one of claims 1 to 6,
The polarizing film whose content rate of the structural unit derived from the monomer which has a polar group in the said polymer is 20 weight% or less. 8. The method according to any one of claims 1 to 7,
The said resin layer is located in the visual recognition side rather than the said polarizer, The polarizing film. 9. The method according to any one of claims 1 to 8,
The polarizing film in which the said resin layer is in direct contact with the said polarizer. 8. The method according to any one of claims 1 to 7,
provided with the two resin layers,
The said polarizer is located between two said resin layers, The polarizing film. 11. The method according to any one of claims 1 to 10,
An adhesive layer and a first transparent protective film are additionally provided,
The polarizing film, wherein the polarizer, the adhesive layer, and the first transparent protective film are arranged in this order in a lamination direction. 12. The method of claim 11,
A second transparent protective film is additionally provided,
The polarizer is positioned between the first transparent protective film and the second transparent protective film. 13. The method according to any one of claims 1 to 12,
An adhesive layer is additionally provided,
The said polarizer is located in the visual recognition side rather than the said adhesive layer, The polarizing film. The polarizing film in any one of Claims 1-13,
An image display device provided with an image display panel.

Images