TW202109095A - Polarizing film with adhesive layer and liquid crystal panel - Google Patents

Abstract

The present invention provides a polarizing film with an adhesive layer that is capable of preventing poor display due to electrification of a liquid crystal display device and reducing degradation of visibility of the liquid crystal display device. The polarizing film with the adhesive layer according to the present invention is provided with a polarizing film and an adhesive layer. The polarizing film with the adhesive layer is further provided with a conductive layer, and the loss of total light transmittance by the conductive layer is 0.9% or less. The conductive layer has a surface resistivity of 1.0 * 10<SP>6</SP> [Omega]/□ or less.

Description

Polarizing film and liquid crystal panel with adhesive layer

The present invention relates to a polarizing film and a liquid crystal panel with an adhesive layer.

The liquid crystal display device includes, for example, a liquid crystal panel, which has a structure in which a polarizing film is arranged on the side of the liquid crystal cell, and an illumination system that illuminates the liquid crystal panel. The liquid crystal display device displays images by adjusting the orientation of the liquid crystal molecules contained in the liquid crystal cell by applying a voltage to the liquid crystal cell.

In the case of liquid crystal display devices, static electricity is generated during its manufacture, such as when a polarizing film is attached to a liquid crystal cell through an adhesive layer; or static electricity is generated during use, such as when a user touches the liquid crystal display device. Due to this static electricity, the liquid crystal display device may become charged. Once the liquid crystal display device is charged, the orientation of the liquid crystal molecules contained in the liquid crystal cell will be disordered and display failure may occur. In order to prevent the display failure of the liquid crystal display device due to charging, it is known, for example, to arrange an ITO (Indium Tin Oxide) layer on the surface of the liquid crystal cell on the side of the polarizing film.

Patent Documents 1 and 2 disclose a laminated structure having a polarizing film and a conductive layer containing a conductive polymer. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2016-39132 Patent Document 2: Japanese Patent Special Form 2015-509615

The problem to be solved by the invention According to the research conducted by the inventors, when the liquid crystal display device is used in an environment where static electricity is particularly prone to (for example, an environment where other electronic devices exist around the interior of a vehicle), in order to fully prevent the liquid crystal display device from being caused by electrification For poor display, the surface resistivity of the conductive layer must be adjusted to a low value. However, if the surface resistivity of the conductive layer is adjusted to a low value, the transmittance of the conductive layer will decrease, and the visibility of the liquid crystal display device will deteriorate.

In view of this, the object of the present invention is to provide a polarizing film with an adhesive layer, which can prevent display failures of the liquid crystal display device due to charging even in liquid crystal display devices that require high antistatic properties, such as automotive displays. At the same time, the deterioration of the visibility of the liquid crystal display device can be suppressed. Means to solve the problem

The present invention provides a polarizing film with an adhesive layer, which is provided with a polarizing film and an adhesive layer; the polarizing film with the adhesive layer is further provided with a conductive layer, and the total light transmittance loss caused by the conductive layer is 0.9% or less And the surface resistivity of the aforementioned conductive layer is 1.0×10 ⁶ Ω/□ or less. Invention effect

According to the present invention, it is possible to provide a polarizing film with an adhesive layer, which can prevent the display failure of the liquid crystal display device due to charging, and at the same time can suppress the deterioration of the visibility of the liquid crystal display device.

The form used to implement the invention In one aspect of the present invention, a polarizing film, a conductive layer, and an adhesive layer are sequentially laminated.

In one aspect of the present invention, the total light transmittance loss caused by the conductive layer is 0.5% or less.

In one aspect of the present invention, the total light transmittance loss due to the conductive layer is 0.4% or less.

In one aspect of the present invention, the surface resistivity of the conductive layer is 5.0×10 ⁵ Ω/□ or less.

In one aspect of the present invention, the surface resistivity of the conductive layer is 1.0×10 ⁴ Ω/□ or less.

In one aspect of the present invention, the surface resistivity of the conductive layer is greater than 5.0×10 ² Ω/□.

In one aspect of the present invention, at least one of the following holds: (i) the total light transmittance loss caused by the conductive layer is 0.5% or less, and the surface resistivity of the conductive layer is 1.0×10 ⁶ Ω/□ or less; And (ii) The total light transmittance loss caused by the conductive layer is 0.9% or less, and the surface resistivity of the conductive layer is 1.0×10 ⁴ Ω/□ or less.

In one aspect of the present invention, the adhesive layer includes a conductive material.

In one aspect of the present invention, the polarizing film with the adhesive layer is further provided with an anti-reflection film, and the anti-reflection film, the polarizing film, and the adhesive layer are sequentially arranged in the stacking direction.

In one aspect of the present invention, the polarizing film with the adhesive layer of the anti-reflection film is laminated with the alkali-free glass in a state where the adhesive layer is in direct contact with the alkali-free glass, when it comes from the CIE standard light source D65 When the light is incident from the surface on the opposite side of the adhesive layer, reflected light with a visual reflectance Y below 1.1% will be generated.

In one aspect of the present invention ^{, the a*} value and b ^{* value in the L*} a ^* b ^* color system of the reflected light satisfy the following relational expressions (1) and (2). -10≦a ^* ≦10...(1) -18≦b ^* ≦5...(2)

In one aspect of the present invention, the anti-reflection film has a first high refractive index layer, a first low refractive index layer, a second high refractive index layer, and a second low refractive index layer in this order in the stacking direction.

In one aspect of the present invention, the optical film thickness of the first high refractive index layer is 20 nm to 35 nm, the optical film thickness of the first low refractive index layer is 38 nm to 50 nm, and the optical film thickness of the second high refractive index layer is 230 nm ~290nm, the optical film thickness of the second low refractive index layer is 100nm~128nm.

In addition, the present invention provides a liquid crystal panel, which has: Polarizing film with adhesive layer, and Liquid crystal cell, And there is no conductive layer between the polarizing film with the adhesive layer and the liquid crystal cell.

Hereinafter, the details of the present invention will be described, but the following description does not mean that the present invention is limited to specific embodiments.

(Implementation form of polarizing film with adhesive layer) As shown in FIG. 1, the polarizing film 10 with an adhesive layer of this embodiment includes a polarizing film 1, a conductive layer 2, and an adhesive layer 3. The polarizing film 1, the conductive layer 2 and the adhesive layer 3 are laminated in this order, for example, and the conductive layer 2 is connected to the polarizing film 1 and the adhesive layer 3 respectively. When the conductive layer 2 is disposed between the polarizing film 1 and the adhesive layer 3, there is a tendency to suppress the deterioration of the conductive layer 2. However, the conductive layer 2 can also be arranged outside between the polarizing film 1 and the adhesive layer 3, for example, it can be arranged such that the polarizing film 1 is between the conductive layer 2 and the adhesive layer 3. The surface of the adhesive layer 3 is exposed to the outside of the polarizing film 10 to which the adhesive layer is attached, for example.

In the polarizing film 10 with the adhesive layer, the total light transmittance loss A caused by the conductive layer 2 is 0.9% or less. According to the study by the inventors of the present invention, when the loss A is suppressed to this level, the deterioration of the visibility of the liquid crystal display device can be sufficiently suppressed. The loss A can be specified by the following method. First, the total light transmittance T1 of the polarizing film 1 and the total light transmittance T2 of the laminate L composed of the polarizing film 1 and the conductive layer 2 are measured. In this specification, "total light transmittance" means the transmittance of light in the wavelength range of 380nm to 700nm. The total light transmittance can be measured in accordance with JIS K7361-1: 1997. D65 light source is used in the measurement of total light transmittance. The total light transmittance T2 of the laminate L is a value when light is incident from the polarizing film 1 side. The difference (T1-T2) between the total light transmittance T1 and the total light transmittance T2 can be specified as loss A.

When measuring the total light transmittance T1 and T2, a layer (such as a hard coat layer) that does not affect the value of the loss A may be arranged on the surface of the polarizing film 1. For example, loss A can be defined as the difference (T3-T4) between the total light transmittance T3 of the layered body L1 and the total light transmittance T4 of the layered body L2 (T3-T4), where the layered body L1 is composed of the hard coat layer H and the polarizing film 1. The laminate L2 is composed of the hard coat layer H, the polarizing film 1 and the conductive layer 2. In the layered body L2, the hard coat layer H, the polarizing film 1 and the conductive layer 2 are laminated in this order. The total light transmittance T3 of the layered body L1 and the total light transmittance T4 of the layered body L2 are both values when light is incident from the hard coat layer H side.

The above-mentioned loss A is preferably 0.8% or less, more preferably 0.6% or less, more preferably 0.5% or less, particularly preferably 0.4% or less, and particularly preferably less than 0.2%. The lower limit of loss A is not particularly limited, and is, for example, 0.01%.

In the polarizing film 10 with the adhesive layer, the surface resistivity of the conductive layer 2 is 1.0×10 ⁶ Ω/□ or less. The conductive layer 2 having a low surface resistivity as low as this level can prevent display failures caused by charging in a liquid crystal display device having a polarizing film 10 with an adhesive layer even in an environment prone to static electricity. The surface resistivity of the conductive layer 2 can be specified by the following method. First, a laminate in which the surface of the conductive layer 2 is exposed to the outside is prepared. Examples of the laminated body include a laminated body L composed of a polarizing film 1 and a conductive layer 2 and a laminated body L2 composed of a hard coat layer H, a polarizing film 1 and a conductive layer 2. Next, the surface resistivity was measured with respect to the surface of the conductive layer 2 of the prepared laminate. The surface resistivity can be measured according to the method specified in JIS K7194: 1994 or JIS K6911: 1995. As an example, when the surface resistivity of the conductive layer 2 is less than 1.0×10 ⁵ Ω/□, the surface resistivity of the conductive layer 2 can be Loresta-GP-MCP-T600 (manufactured by Mitsubishi Chemical Analytech) and conform to JIS K7194: 1994 Determined by the prescribed method. When the surface resistivity of the conductive layer 2 is 1.0×10 ⁵ Ω/□ or more, the surface resistivity of the conductive layer 2 can be performed using Hiresta-UP MCP-HT450 (manufactured by Mitsubishi Chemical Analytech) and in accordance with the method specified in JIS K6911: 1995 Determination. The measured value obtained by the above-mentioned measurement can be regarded as the surface resistivity of the conductive layer 2 in the polarizing film 10 with the adhesive layer.

The surface resistivity of the conductive layer 2 is preferably 5.0×10 ⁵ Ω/□ or less, preferably 1.0×10 ⁵ Ω/□ or less, more preferably 1.0×10 ⁴ Ω/□ or less, particularly ^{preferably 1.0×10 3} Ω /□ Below. The lower limit of the surface resistivity of the conductive layer 2 is not particularly limited, and is, for example, 1.0×10 ² Ω/□. When using a polarizing film 10 with an adhesive layer in a liquid crystal display device equipped with a touch sensor or touch panel, from the viewpoint of sufficiently ensuring the sensitivity of the touch sensor or touch panel provided in the liquid crystal display device , The surface resistivity of the conductive layer 2 can also be greater than 5.0×10 ² Ω/□.

In the polarizing film 10 with the adhesive layer, when the above loss A is greater than 0.5%, the surface resistivity of the conductive layer 2 can also be a particularly low value. As an example, in the polarizing film 10 with the adhesive layer, at least one of the following may be true: (i) the above loss A is 0.5% or less and the surface resistivity of the conductive layer 2 is 1.0×10 ⁶ Ω/□ or less; And (ii) The aforementioned loss A is 0.9% or less, and the surface resistivity of the conductive layer 2 is 1.0×10 ⁴ Ω/□ or less.

[Polarizing Film] The polarizing film 1 is a laminate including a polarizer and a transparent protective film. The transparent protective film is, for example, arranged to be in contact with the main surface (the surface with the largest area) of the layered polarizer. The polarizer can also be arranged between two transparent protective films. The polarizer is not particularly limited, and examples include hydrophilic polymer films such as polyvinyl alcohol-based films, partially formalized polyvinyl alcohol-based films, and ethylene-vinyl acetate copolymer-based partially saponified films that adsorb iodine or dichroism. Dye dichroic substances and uniaxially stretched ones, as well as polyene-based oriented films such as dehydrated polyvinyl alcohol or dehydrated polyvinyl chloride. The polarizer is preferably made of dichroic materials such as polyvinyl alcohol-based film and iodine.

The thickness of the polarizer is not particularly limited, for example, it is 80 µm or less. The thickness of the polarizer can also be less than 10µm, and preferably 1~7µm. This thin polarizer has less variation in thickness and is excellent in visibility. The dimensional change of the thin polarizer is suppressed and the durability is good. The polarizing film 1 can be made thinner by using a thin polarizer.

As the material of the transparent protective film, for example, thermoplastic resins excellent in transparency, mechanical strength, thermal stability, moisture barrier properties, and isotropy can be used. Specific examples of such thermoplastic resins include cellulosic resins such as triacetyl cellulose, polyester resins, polyether resins, polycarbonate resins, polycarbonate resins, polyamide resins, and polyimide resins. , Polyolefin resin, (meth)acrylic resin, cyclic polyolefin resin (norbornene resin), polyarylate resin, polystyrene resin, polyvinyl alcohol resin and mixtures thereof. The material of the transparent protective film may also be thermosetting resins such as (meth)acrylic, urethane, acrylic urethane, epoxy, and silicone resins, or ultraviolet curable resins. When the polarizing film 1 has two transparent protective films, the materials of the two transparent protective films may be the same or different from each other. For example, a transparent protective film made of thermoplastic resin may be bonded to one main surface of the polarizer through an adhesive, and a thermosetting resin or ultraviolet curable resin may be bonded to the other main surface of the polarizer. Transparent protective film. The transparent protective film may also contain one or more arbitrary additives.

The transparent protective film may also have optical properties such as anti-glare properties and anti-reflection properties. The transparent protective film may also be a film that functions as a retardation film. In this specification, the retardation film means a film having birefringence in the in-plane direction or the thickness direction. The film that functions as a retardation film includes, for example, a film obtained by stretching a polymer film, a film obtained by aligning and fixing a liquid crystal material, and the like.

The adhesive used to bond the polarizer and the transparent protective film is not particularly limited as long as it is optically transparent, and examples include water-based, solvent-based, hot-melt adhesive-based, radical-curing, and cation-curing adhesives. It is also suitable for water-based adhesives and free radical hardening adhesives.

The thickness of the polarizing film 1 is, for example, 10 μm to 500 μm. The total light transmittance of the polarizing film 1 is not particularly limited, and is, for example, 30%-50%.

When light from the CIE standard light source D65 is incident on the polarizing film 1, the value of a in the Hunter Lab color system of transmitted light should be -6.0~0, and -3.0~-0.5 is better, -1.8~-1.2 is particularly good . The b value in the above-mentioned Hunter Lab color system of transmitted light is preferably 1.0~10, and 1.5~5.0 is preferred, and 2.2~4.0 is particularly preferred. The a value and b value in the Hunter Lab color system of transmitted light can be identified by the following methods. First, using the integrating sphere of the spectrophotometer, the transmittance of the light from the CIE standard light source D65 in the polarizing film 1 is measured. For the obtained transmittance, the visual sensitivity correction (780~380nm: every 5nm) of the 2-degree field of view XYZ system specified in JIS Z8701: 1999 can be used to specify the a value and the a value of the Hunter Lab color system of the transmitted light. b value.

[Conductive layer] The conductive layer 2 is not particularly limited as long as the surface resistivity is adjusted to 1.0×10 ⁶ Ω/□ or less and the loss A is 0.9% or less. The conductive layer 2 is a layer containing a conductive material. The conductive material can be a material other than ITO, such as a conductive polymer, a composite of a conductive polymer and a dopant, an ionic surfactant, a conductive fine particle, an ionic compound, and the like. From the viewpoints of transparency, total light transmittance, appearance, antistatic effect, and stability of the antistatic effect in a high-temperature or high-humidity environment, the conductive layer 2 preferably contains a conductive polymer. When the conductive layer 2 contains a conductive polymer as a conductive material, compared to the case where it contains conductive fine particles, even if the thickness of the conductive layer 2 is adjusted to be relatively large, haze is less likely to occur. Therefore, even when the conductive layer 2 is disposed between the liquid crystal cell and the polarizing member, the conductive layer 2 containing the conductive polymer is still not prone to depolarization, and it is not easy to reduce the contrast of the image displayed by the liquid crystal display device. When the conductive layer 2 contains a conductive polymer as a conductive material, the refractive index of the conductive layer 2 tends to be lower than when it contains conductive fine particles. Therefore, the conductive layer 2 containing a conductive polymer is suitable for reducing the light reflectivity of the liquid crystal panel.

Examples of the conductive polymer include polythiophene, polyaniline, polypyrrole, polyquinoline, polyacetylene, polystyrene, polynaphthalene, and derivatives thereof. The conductive material may contain one or more of these conductive polymers. The conductive polymer is preferably polythiophene, polyaniline and derivatives thereof, and polythiophene derivatives are particularly preferred. Polythiophene, polyaniline, and derivatives thereof, for example, can function as water-soluble or water-dispersible conductive polymers. When the conductive polymer is water-soluble or water-dispersible, an aqueous solution or dispersion of the conductive polymer can be used to produce the conductive layer 2. At this time, it is not necessary to use a non-aqueous organic solvent when fabricating the conductive layer 2, so the deterioration of the polarizing film 1 etc. caused by the organic solvent can be suppressed.

The conductive polymer may also have a hydrophilic functional group. Hydrophilic functional groups can include sulfonic acid groups, amino groups, amide groups, imine groups, hydroxyl groups, sulfhydryl groups, hydrazine groups, carboxyl groups, sulfate ester groups, phosphate ester groups and their salts (such as quaternary ammonium salt groups). ). When the conductive polymer has a hydrophilic functional group, there is a tendency that the conductive polymer is easily dissolved in water, or the particulate conductive polymer is easily dispersed in water.

From the viewpoint of conductivity and chemical stability, the conductive polymer is preferably poly(3,4-disubstituted thiophene). Poly(3,4-disubstituted thiophene) can be exemplified by poly(3,4-alkylene dioxythiophene) and poly(3,4-dialkoxythiophene), and is preferably poly(3,4-dioxythiophene). Alkyl dioxythiophene). Poly(3,4-alkylenedioxythiophene) has, for example, a structural unit represented by the following formula (I). [Chemical formula 1]

In the formula (I), R ^{1 is, for} example, an alkylene group having 1 to 4 carbon atoms. The alkylene group may be linear or branched. Examples of alkylene include methylene, 1,2-ethylene, 1,3-propylene, 1,4-butylene, 1-methyl-1,2-ethylene, 1-ethyl -1,2-ethylene, 1-methyl-1,3-propylene, and 2-methyl-1,3-propylene, and preferably methylene, 1,2-ethylene Group, 1,3-propylene group, more preferably 1,2-ethylene group. The conductive polymer is preferably poly(3,4-ethylenedioxythiophene) (PEDOT).

Examples of dopants include multivalent anions. When the conductive polymer is polythiophene (or a derivative thereof), the polyvalent anion can form an ion pair with the polythiophene (or a derivative thereof), thereby stably dispersing the polythiophene (or a derivative thereof) in water. The polyvalent anion is not particularly limited, and examples include carboxylic acid polymers such as polyacrylic acid, polymaleic acid, and polymethacrylic acid; and sulfonic acids such as polystyrene sulfonic acid, polyvinyl sulfonic acid, and polyisoprene sulfonic acid. Acid polymers, etc. The multivalent anion may also be a copolymer of vinyl carboxylic acid or vinyl sulfonic acid and other monomers. Examples of other monomers include (meth)acrylate compounds; aromatic vinyl compounds such as styrene and vinyl naphthalene. The polyvalent anion is particularly preferably polystyrene sulfonic acid (PSS). Examples of the composite of the conductive polymer and the dopant include the composite of poly(3,4-ethylenedioxythiophene) and polystyrene sulfonic acid (PEDOT/PSS).

Examples of ionic surfactants include cationic surfactants such as quaternary ammonium salt type, phosphonium salt type, and sulfonate salt type; carboxylic acid type, sulfonate type, sulfate type, phosphate type, phosphite type, etc. Anionic surfactants; zwitterionic surfactants such as sulfobetaine type, alkyl betaine type, alkyl imidazolium betaine type, etc.; polyol derivatives, β-cyclodextrin inclusion compound, sorbitan Nonionic surfactants such as alcohol fatty acid esters, sorbitan fatty acid diesters, polyalkylene oxide derivatives, and amine oxides.

Examples of the conductive fine particles include metal oxide fine particles of tin oxide type, antimony oxide type, indium oxide type, and zinc oxide type, and tin oxide type fine particles are preferred. The material of the tin oxide-based fine particles includes, for example, tin oxide, antimony-doped tin oxide, indium-doped tin oxide, aluminum-doped tin oxide, tungsten-doped tin oxide, titanium oxide-cerium oxide-tin oxide composite, titanium oxide -Compounds of tin oxide, etc. The average particle diameter of the conductive fine particles is, for example, 1 to 100 nm, and preferably 2 to 50 nm. The average particle size of the conductive fine particles means the particle size (d50) corresponding to 50% of the cumulative volume in the particle size distribution measured with a laser diffraction particle size meter, for example.

Examples of the ionic compound include alkali metal salts and/or organic cation-anion salts. Examples of alkali metal salts include organic salts and inorganic salts of alkali metals. In this specification, an organic cation-anion salt means an organic salt containing an organic cation. The anion contained in the organic cation-anion salt may be an organic anion or an inorganic anion. Organic cation-anion salts are sometimes called ionic liquids or ionic solids.

The alkali metal ions contained in the alkali metal salt can be exemplified by lithium ions, sodium ions, and potassium ions, and lithium ions are preferred.

Alkali metal salts of organic anions may be contained as for example ^{_{CH 3 COO -, CF 3 COO}} -, CH 3 SO 3 -, CF 3 SO 3 -, (CF 3 SO 2) 3 C -, C 4 F 9 SO 3 - ^{_{, C 3 F 7 COO -,}} (CF 3 SO 2) (CF 3 CO) N -, - O 3 S (CF 2) 3 SO 3 -, (CN) 2 N - and the following formula (a) ~ (d) The anion shown. _{(a) (C n F 2n} + 1 SO 2) 2 N - ( but, n is an integer of 1 to 9 _{in) (b) CF 2 (C} m F 2m SO 2) 2 N - ( but, m is 1 ~ integer 10 _{^{of) (c) - O 3 S}} (CF 2) l SO 3 - ( but, l is an integer of 1 to 9 _{in) (d) (C p F} 2p + 1 SO 2) N - (C q F 2q ₊₁ SO ₂ ) (However, p and q are independent of each other as an integer from 1 to 10)

The anion contained in the organic salt of alkali metal preferably contains a fluorine atom. With the anion containing a fluorine atom, an organic salt of an alkali metal can function as an ionic compound with excellent ion dissociation.

Alkali metal salts such as for example contained in the anion of ^{Cl -, Br -, I -} , AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, AsF 6 -, SbF _{^{6 -, NbF 6 -, TaF}} 6 -, (FSO 2) 2 N -, CO 3 2 - and the like.

Is suitably an alkali metal salt contained in the anion _{(CF 3 SO 2) 2 N} -, (C 2 F 5 SO 2) 2 N - like the above general formula (1) (perfluoroalkyl sulfonic acyl) (PEI) , particularly appropriate is _{(CF 3 SO 2) 2 N} - formula (trifluoromethane sulfonic acyl) (PEI).

Examples of organic salts of alkali metals include sodium acetate, sodium alginate, sodium lignosulfonate, sodium toluenesulfonate, LiCF ₃ SO ₃ , Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N, Li(CF ₃ SO ₂ ) ₃ C, KO ₃ S(CF ₂ ) ₃ SO ₃ K, LiO ₃ S(CF ₂ ) ₃ SO ₃ K, etc., and It should be LiCF ₃ SO ₃ , Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N, Li(CF ₃ SO ₂ ) ₃ C Etc., preferably Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N, etc. The organic salt of the alkali metal is preferably a fluorine-containing iminium lithium salt, and (perfluoroalkylsulfonyl) iminium lithium salt is particularly preferred.

Examples of inorganic salts of alkali metals include lithium perchlorate and lithium iodide.

Organic cations contained in the organic cation-anion salt include, for example, pyridinium cations, piperidinium cations, pyrrolidinium cations, cations having a dihydropyrrole skeleton, cations having a pyrrole skeleton, imidazolium cations, and tetrahydropyrimidinium cations. , Dihydropyrimidinium cation, pyrazolium cation, pyrazolinium cation, tetraalkylammonium cation, trialkylsulfonium cation, tetraalkylphosphonium cation, etc.

Organic cation - anionic salt for example such as may be contained in the anion ^{Cl -, Br -, I -} , AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, CH 3 COO - _{^{, CF 3 COO -, CH 3}} SO 3 -, CF 3 SO 3 -, (CF 3 SO 2) 3 C -, AsF 6 -, SbF 6 -, NbF 6 -, TaF 6 -, (CN) 2 N - ^{_{, C 4 F 9 SO 3 -}} , C 3 F 7 COO -, (CF 3 SO 2) (CF 3 CO) N -, (FSO 2) 2 N -, - O 3 S (CF 2) 3 SO 3 - And the anions represented by the above general formulas (a) to (d). The anion contained in the organic cation-anion salt preferably contains a fluorine atom. With the anion containing a fluorine atom, the organic cation-anion salt can function as an ionic compound with excellent ion dissociation.

The ionic compound is not limited to the above-mentioned alkali metal salts and organic cation-anion salts, and examples thereof include inorganic salts such as ammonium chloride, aluminum chloride, copper chloride, ferrous chloride, iron chloride, and ammonium sulfate. The conductive material may contain one or more of the above-mentioned ionic compounds.

The conductive material is not limited to the above-mentioned materials, and carbon materials such as acetylene black, Ketjen black, natural graphite, and artificial graphite; titanium black; cationic conductive groups such as quaternary ammonium salts, and zwitterions such as betaine compounds Homopolymers of monomers such as anionic conductive groups such as sulfonate or non-ionic conductive groups such as glycerin, or copolymers of this monomer and other monomers (e.g. Polymers with ionic conductivity such as structural units of base acrylate or methacrylate); made by alloying hydrophilic polymers such as copolymers of ethylene and methacrylate with acrylic resins, etc. Those (permanent antistatic agent).

In addition to the conductive material, the conductive layer 2 may further contain other materials such as adhesives. The adhesive, for example, has a tendency to improve the film forming property of the conductive material and at the same time improve the adhesion and adhesion (anchor power) of the conductive layer 2 to the polarizing film 1. The binder can include, for example, azolin group-containing polymers, polyurethane resins, polyester resins, acrylic resins, polyether resins, cellulose resins, polyvinyl alcohol resins, and epoxy resins. , Polyvinylpyrrolidone, polystyrene resin, polyethylene glycol, neopentyl erythritol, etc., but preferably oxazoline group-containing polymers, polyurethane resins, polyester resins, The acrylic resin is particularly preferably a polyurethane resin. The conductive layer 2 may also include one or more of these adhesives. The content of the binder in the conductive layer 2 is, for example, 1wt%~90wt%, and preferably 10wt%~80wt%.

The thickness of the conductive layer 2 is, for example, 5 nm to 180 nm, preferably 150 nm, more preferably 120 nm or less, more preferably 100 nm or less, particularly preferably 80 nm or less, and particularly preferably 50 nm or less. The thickness of the conductive layer 2 may be 10 nm or more, or 20 nm or more.

The anchoring force between the conductive layer 2 and the polarizing film 1 is, for example, 10.0N/25mm or more, preferably 12.0N/25mm or more, more preferably 14.0N/25mm or more, and more preferably 18.0N/25mm or more. The above-mentioned anchoring force can be measured by the following method. First, the polarizing film 10 with the adhesive layer of the evaluation object is cut into a width of 25 mm × a length of 150 mm to form a test piece. Next, through the double-sided tape, the entire surface of the polarizing film 1 included in the test piece was superimposed on a stainless steel test plate, and a 2 kg roller was reciprocated once for pressure bonding. Next, the adhesive layer 3 provided in the test piece was laminated on the evaluation sheet, and the 2 kg roller was reciprocated once to perform pressure bonding. The evaluation sheet is not particularly limited as long as it has a size of 30 mm in width×150 mm in length and does not peel off from the adhesive layer 3 in the test. As the evaluation sheet, for example, an ITO film (125 TETOLIGHT OES (manufactured by Oike Kogyo Co., Ltd.), etc.) can be used. Next, using a commercially available tensile tester, while holding the evaluation sheet, the adhesive layer 3 and the conductive layer 2 are peeled off the polarizing film 1 at a peeling angle of 180° and a tensile speed of 300 mm/min. The average value of the peeling force is specified as the anchoring force of the conductive layer 2 and the polarizing film 1. In addition, the above-mentioned test was carried out in a 23°C gas environment.

The surface resistivity of the conductive layer 2 and the aforementioned loss A not only change according to the composition of the conductive material contained in the conductive layer 2, but also change according to the content of the conductive material of the conductive layer 2, the thickness of the conductive layer 2, and the like. Patent Documents 1 and 2 do not describe nor teach that the surface resistivity of the conductive layer is maintained at 1.0×10 ⁶ Ω/□ or less, while the loss A is adjusted to 0.9% or less. For example, Patent Document 1 discloses that in a state where a coating composition for forming a conductive layer is applied to a transparent protective film, the measured value of its total light transmittance is about 98.5% or less (Example 1- 53). From this result, it can be imagined that in the structure of Patent Document 1, it is difficult to adjust the loss A to a value smaller than 1.5%.

[Adhesive layer] The adhesive layer 3 is a layer containing an adhesive. The adhesive contained in the adhesive layer 3 includes, for example, rubber-based adhesives, acrylic-based adhesives, silicone-based adhesives, urethane-based adhesives, vinyl alkyl ether-based adhesives, and polyvinylpyrrolidone. Adhesives, polyacrylamide-based adhesives, cellulose-based adhesives, etc. From the viewpoints of good optical transparency, appropriate adhesive properties such as wettability, cohesiveness, and adhesiveness, and excellent weather resistance, heat resistance, etc., the adhesive contained in the adhesive layer 3 is preferably an acrylic adhesive.

The acrylic adhesive contains a (meth)acrylic polymer as a base polymer. The (meth)acrylic polymer contains, for example, a structural unit derived from (meth)acrylate as a main component. In this specification, "(meth)acrylic acid" means acrylic acid and/or methacrylic acid. The "principal component" means that the polymer contains the most structural units on a weight basis.

The carbon number of the ester portion (the portion other than the (meth)acrylic group) contained in the (meth)acrylate used to form the main skeleton of the (meth)acrylic polymer is not particularly limited, and is, for example, 1~ 18. The ester portion of the (meth)acrylate may contain aromatic rings such as a phenyl group and a phenoxy group, and may also contain an alkyl group. The alkyl group may be linear or branched. The (meth)acrylic polymer may contain one or more structural units derived from (meth)acrylate. In the (meth)acrylic polymer, the average carbon number of the ester portion contained in the structural unit derived from the (meth)acrylate is preferably 3-9. From the viewpoints of adhesive properties, durability, adjustment of retardation, adjustment of refractive index, etc., the (meth)acrylic polymer preferably has a structural unit derived from an aromatic ring-containing (meth)acrylate. By adjusting the phase difference of the adhesive layer 3 by using the aromatic ring-containing (meth)acrylate, the heat shrinkage of the polarizing film 1 and the light leakage of the liquid crystal display caused by the extension of the adhesive layer 3 can be suppressed. In addition, the (meth)acrylate is suitable for adjusting the refractive index of the adhesive layer 3 to reduce the difference in refractive index between the adhesive layer 3 and the adherend (for example, a liquid crystal cell). As long as the difference in refractive index is reduced, light reflection at the interface between the adhesive layer 3 and the adherend can be suppressed, and the visibility of the display can be improved.

The aromatic ring-containing (meth)acrylates include, for example, benzyl (meth)acrylate, phenyl (meth)acrylate, ortho-phenylphenol (meth)acrylate, phenoxy (meth)acrylate, Phenoxyethyl (meth)acrylate, phenoxypropyl (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, ethylene oxide modified nonphenol (meth)acrylate, ring Modified cresol (meth)acrylate with oxyethane, modified (meth)acrylate with phenol ethylene oxide, 2-hydroxy-3-phenoxypropyl (meth)acrylate, methoxybenzyl (Meth) acrylate, chlorobenzyl (meth)acrylate, cresol (meth)acrylate, polystyrene (meth)acrylate and other (meth)acrylates containing benzene ring; hydroxyethyl Β-naphthol acrylate, 2-naphthylethyl (meth) acrylate, 2-naphthoxyethyl acrylate, 2-(4-methoxy-1-naphthoxy) ethyl (methyl) (Meth)acrylates containing naphthalene ring, such as acrylates; (meth)acrylates containing biphenyl ring, such as biphenyl (meth)acrylates. Among them, from the viewpoint of improving the adhesive properties and durability of the adhesive layer 3, benzyl (meth)acrylate and phenoxyethyl (meth)acrylate are more preferable.

When using aromatic ring-containing (meth)acrylate to adjust the refractive index of the adhesive layer 3, the total constituent units of the (meth)acrylic polymer are derived from aromatic ring-containing (meth)acrylate The content rate of the structural unit is preferably 3% by weight to 25% by weight. The content is preferably 22% by weight or less, and more preferably 20% by weight or less. The content is preferably 8% by weight or more, and more preferably 12% by weight or more. If the content of the structural unit derived from the aromatic ring-containing (meth)acrylate is less than 25% by weight, it tends to be able to suppress the light leakage of the liquid crystal display device caused by the shrinkage of the polarizing film 1, and at the same time improve the adhesion The heavy workability of the agent layer 3. If the content is 3% by weight or more, there is a tendency that light leakage of the liquid crystal display device can be sufficiently suppressed.

From the viewpoint of improving adhesiveness and heat resistance, the (meth)acrylic polymer may have at least one type of structural unit derived from the aromatic ring-containing (meth)acrylate in addition to the above-mentioned structural unit derived from the aromatic ring-containing (meth)acrylate. (Meth)acrylic acid group, vinyl group and other unsaturated double bond polymerizable functional group comonomer structural unit. The comonomers include, for example, 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate , 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)acrylate, (4-hydroxymethylcyclohexyl)methacrylate, etc. containing hydroxyl groups Monomers; (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid and other carboxyl group-containing monomers; maleic anhydride, iran Acrylic anhydride and other acid anhydride group-containing monomers; acrylic acid caprolactone adducts; styrene sulfonic acid, allyl sulfonic acid, 2-(meth)acrylamide-2-methylpropanesulfonic acid, (meth) Sulfonic acid group-containing monomers such as acrylamide propane sulfonic acid, (meth) sulfopropyl acrylate, (meth) acryloxynaphthalene sulfonic acid, etc.; 2-hydroxyethyl acrylamide phosphate, etc., containing phosphoric acid The monomer of the base and so on.

The above-mentioned comonomers include, for example, (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-butyl(meth)acrylamide, N-methylol(methyl)acrylamide, ) (N-substituted) amide-based monomers such as acrylamide, N-hydroxymethylpropane (meth)acrylamide, etc.; (meth)aminoethyl acrylate, (meth)acrylic acid N,N-dimethyl Alkylaminoalkyl (meth)acrylate monomers such as aminoethyl, tributylaminoethyl (meth)acrylate, etc.; methoxyethyl (meth)acrylate, ethoxy (meth)acrylate Alkoxyalkyl (meth)acrylate monomers such as ethyl ester; N-(meth)acryloyloxymethylene succinimidyl, N-(meth)acryloyl-6-oxy Succinimidyl monomers such as hexamethylene succinimidyl, N-(meth)acryloyl-8-oxyoctamethylene succinimidyl; N-acryloyl mopholin, etc. Folin-based monomers; N-cyclohexyl maleimide, N-isopropyl maleimide, N-lauryl maleimide, N-phenylmaleimide and other maleic acid Imine-based monomers; N-Methyl Ikonimines, N-Ethyl Ikonimines, N-butyl Ikonimines, N-octyl Ikonimines, N-2- Ethylhexyl Ikonimines, N-cyclohexyl Ikonimines, N-Lauryl Ikonimines and other Ikonimines, etc.

The aforementioned comonomers include, for example, vinyl acetate, vinyl propionate, N-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiper, Vinyl pyrrole, vinyl pyrrole, vinyl imidazole, vinyl azole, vinyl mopholin, N-vinyl amides, styrene, α-methyl styrene, N-vinyl caprolactone Vinyl monomers such as amines; cyanoacrylate monomers such as acrylonitrile and methacrylonitrile; acrylic monomers containing epoxy groups such as glycidyl (meth)acrylate; polyethylene glycol (former Base) acrylate, polypropylene glycol (meth)acrylate, methoxy glycol (meth)acrylate, methoxy polypropylene glycol (meth)acrylate and other glycol-based acrylate monomers; (methyl) ) Acrylic monomers such as tetrahydrofurfuryl acrylate, fluoro(meth)acrylate, polysiloxane (meth)acrylate, 2-methoxyethyl acrylate, etc. In addition, the comonomer may also include olefin units such as isoprene, butadiene, and isobutylene, and may also include vinyl-containing monomers such as vinyl ether groups.

The aforementioned comonomers can also include, for example, 3-propenyloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4- Vinylbutyltriethoxysilane, 8-vinyloctyltrimethoxysilane, 8-vinyloctyltriethoxysilane, 10-methacryloxydecyltrimethoxysilane, 10- Silane-based monomers such as acryloxydecyltrimethoxysilane, 10-methacryloxydecyltriethoxysilane, and 10-acryloxydecyltriethoxysilane.

As the above-mentioned comonomers, for example, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A Glycidyl ether di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, neopentaerythritol tri(meth)acrylate, new Pentaerythritol tetra (meth) acrylate, dineopentaerythritol penta (meth) acrylate, dineopentaerythritol hexa (meth) acrylate, caprolactone modified dineopentaerythritol hexa (meth) acrylate (Meth)acrylic acid esters such as acrylates and polyols (multifunctional monomers with two or more (meth)acrylic acid groups, vinyl groups and other unsaturated double bonds); addition of two or more Compounds composed of compounds with unsaturated double bonds, and the compounds with unsaturated double bonds have (meth)acrylic, vinyl and other unsaturated double bonds on the skeleton of polyester, epoxy, urethane, etc. (For example, polyester (meth)acrylate, epoxy (meth)acrylate, urethane (meth)acrylate, etc.).

The content of the structural unit derived from the above-mentioned comonomer in the (meth)acrylic polymer is not particularly limited, for example, 0wt%-20wt%, and preferably 0.1wt%-15wt%, preferably 0.1wt% ~10wt%.

From the viewpoint of adhesion and durability, the comonomers are preferably hydroxyl-containing monomers and carboxyl-containing monomers. The comonomer can also use a hydroxyl group-containing monomer and a carboxyl group-containing monomer in combination. For example, when the adhesive composition for forming the adhesive layer 3 contains a crosslinking agent, the comonomer functions as a reaction point with the crosslinking agent. The hydroxyl group-containing monomers, carboxyl group-containing monomers, etc., have good reactivity with the intermolecular crosslinking agent, and are therefore suitable for improving the cohesion and heat resistance of the resulting adhesive layer 3. In particular, the hydroxyl-containing monomer is suitable for improving the reworkability of the adhesive layer 3. The carboxyl group-containing monomer is suitable for the adhesive layer 3 to have both durability and heavy workability.

When a hydroxyl-containing monomer is used as a comonomer, the content of the structural unit derived from the hydroxyl-containing monomer in the (meth)acrylic polymer is preferably 0.01wt%~15wt%, preferably 0.03wt%~10wt% , 0.05wt%~7wt% is better. When a carboxyl group-containing monomer is used as a comonomer, the content of the structural unit derived from the carboxyl group-containing monomer in the (meth)acrylic polymer is preferably 0.05wt%~10wt%, and the content rate is between 0.1wt%~8wt%. Better, 0.2wt%~6wt% is even better.

The weight average molecular weight of the (meth)acrylic polymer is, for example, 500,000 to 3 million. From the viewpoint of durability, especially heat resistance, it is preferably 700,000 to 2.7 million, and more preferably 800,000 to 2.5 million. When the weight average molecular weight of the (meth)acrylic polymer is 500,000 or more, the adhesive layer 3 tends to have sufficient heat resistance practically. When the weight average molecular weight of the (meth)acrylic polymer is 3 million or less, the viscosity of the coating liquid used to make the adhesive layer 3 tends to be easily adjusted. If the viscosity of the coating liquid can be easily adjusted, there is no need to add a large amount of diluent solvent to the coating liquid, so the manufacturing cost of the adhesive layer 3 can be suppressed. In this specification, the weight average molecular weight refers to the value obtained by converting the measurement result of GPC (Gel Permeation Chromatography) into polystyrene.

The (meth)acrylic polymer can be produced by known polymerization reactions such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations. The (meth)acrylic polymer may be a random copolymer, a block copolymer, or a graft copolymer.

The adhesive contained in the adhesive layer 3 may also have a structure in which the base polymer is cross-linked by a cross-linking agent. For example, when a (meth)acrylic polymer is used as the base polymer, an organic crosslinking agent or a polyfunctional metal chelate can be used as the crosslinking agent. Examples of the organic crosslinking agent include isocyanate-based crosslinking agents, peroxide-based crosslinking agents, epoxy-based crosslinking agents, and imine-based crosslinking agents. Multifunctional metal chelate refers to a product in which a multivalent metal and an organic compound are covalently bonded or coordinately bonded. The atoms that constitute the polyvalent metal can include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti Wait. The organic compound contained in the polyfunctional metal chelate includes, for example, an oxygen atom. Examples of the organic compound include alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, and ketone compounds.

In the adhesive, relative to 100 parts by weight of the (meth)acrylic polymer, the amount of crosslinking agent used is preferably 3 parts by weight or less, and preferably 0.01 to 3 parts by weight, more preferably 0.02 to 2 parts by weight, 0.03 to 1 part by weight is particularly preferred.

The adhesive layer 3 may further contain other materials besides the adhesive. Examples of other materials include conductive materials, silane coupling agents, and other additives. The conductive material will reduce the surface resistivity of the adhesive layer 3, which is suitable for preventing the display failure of the liquid crystal display device due to charging. The conductive material may include the things described in the conductive layer 2 previously. The conductive material contained in the adhesive layer 3 is preferably an ionic compound from the viewpoint of compatibility with the base polymer and transparency of the adhesive layer 3. In particular, when the adhesive layer 3 contains an acrylic adhesive and the acrylic adhesive contains a (meth)acrylic polymer as a base polymer, it is preferable to use an ionic compound as a conductive material. The ionic compound is preferably an ionic liquid based on the viewpoint of antistatic performance.

Relative to 100 parts by weight of the base polymer of the adhesive (such as (meth)acrylic polymer), the adhesive layer 3 preferably contains 0.05-20 parts by weight of conductive material (such as ionic compounds). Since the adhesive layer 3 contains more than 0.05 parts by weight of conductive material, there is a tendency to sufficiently reduce the surface resistivity of the adhesive layer 3 and fully improve the antistatic performance of the adhesive layer 3. Relative to 100 parts by weight of the base polymer of the adhesive, the adhesive layer 3 preferably contains 0.1 parts by weight or more of conductive material, and preferably contains 0.5 parts by weight or more. From the viewpoint of giving the adhesive layer 3 practically sufficient durability, the adhesive layer 3 preferably contains 20 parts by weight or less of conductive material and 10 parts by weight relative to 100 parts by weight of the base polymer of the adhesive. The following is better.

Other additives, such as polyether compounds such as polyalkylene glycol (e.g. polypropylene glycol), colorants, pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, and leveling can be appropriately used in accordance with the intended use. Agents, softeners, antioxidants, anti-aging agents, light stabilizers, ultraviolet absorbers, polymerization inhibitors, inorganic fillers, organic fillers, metal powders, etc. The additive can be powder, granular, or foil. It is also possible to use a reducing agent as an additive within a controllable range, thereby forming a redox system. By adding pigments such as a colorant to the adhesive layer 3, the hue of the reflected light from the polarizing film 10 of the adhesive layer can be adjusted. Relative to 100 parts by weight of the base polymer of the adhesive (for example (meth)acrylic polymer), the adhesive layer 3 preferably contains 5 parts by weight or less of other additives, and preferably contains 3 parts by weight or less, and contains 1 part by weight The following is better.

The thickness of the adhesive layer 3 is not particularly limited, for example, 5-100 µm, and preferably 10-50 µm.

In the polarizing film 10 with the adhesive layer, the surface resistivity of the adhesive layer 3 is not particularly limited, and can be less than 1.0×10 ¹⁴ Ω/□, and preferably 1.0×10 ¹² Ω/□ or less. The lower limit of the surface resistivity of the adhesive layer 3 is not particularly limited, but from the viewpoint of durability, it is, for example, 1.0×10 ⁸ Ω/□. The surface resistivity of the adhesive layer 3 can be measured by the same method as the conductive layer 2.

[Other layers] The polarizing film 10 with an adhesive layer may further include other layers other than the polarizing film 1, the conductive layer 2 and the adhesive layer 3. The polarizing film 10 with the adhesive layer may also include one or more other layers. The other layers are, for example, arranged on the side of the polarizing film 1 that is closer to the visibility side, and connected to the polarizing film 1. Examples of other layers include surface treatment layers, surface protection films, and retardation films. The surface treatment layer can be, for example, a hard coat layer, an anti-glare treatment layer, an anti-reflection layer, an anti-adhesion layer, and the like.

For the material of the hard coat layer, for example, a thermoplastic resin, a material hardened by heat or radiation, etc. can be used. Examples of materials that are cured by heat or radiation include thermosetting resins; radiation curing resins such as ultraviolet curing resins and electron beam curing resins. If it is based on an ultraviolet-curable resin, the cured resin layer can be efficiently formed with a simple processing operation by curing treatment by ultraviolet irradiation. Examples of curable resins include polyester resins, acrylic resins, urethane resins, amide resins, silicone resins, epoxy resins, and melamine resins. Curable resins include, for example, monomers, oligomers, and polymers such as polyester-based, acrylic-based, urethane-based, amide-based, silicone-based, epoxy-based, and melamine-based monomers. From the viewpoint of fast processing speed and less heat loss to the substrate, the material of the hard coat layer is preferably radiation-curing resin, especially UV-curing resin. The ultraviolet curable resin preferably contains, for example, a compound having an ultraviolet polymerizable functional group, especially an acrylic monomer or oligomer having two or more (preferably 3 to 6) functional groups. For example, a photopolymerization initiator may be blended in the ultraviolet curable resin.

The anti-glare treatment layer and the anti-reflection layer are suitable for improving the visibility of the liquid crystal display device. The surface treatment layer has a hard coating layer and an anti-glare treatment layer or an anti-reflection layer, and the anti-glare treatment layer or the anti-reflection layer is configured to be closer to the viewing side than the hard coating layer. The material of the anti-glare treatment layer is not particularly limited. For example, radiation hardening resin, thermosetting resin, thermoplastic resin, etc. can be used. The material of the anti-reflection layer can be, for example, titanium oxide, zirconium oxide, silicon oxide, magnesium fluoride, etc. The surface treatment layer may have multiple anti-reflection layers.

The surface treatment layer may have conductivity by containing a conductive material. The conductive material may include the things described in the conductive layer 2 previously.

The surface protection film may be disposed on the above-mentioned surface treatment layer, or may be disposed on the polarizing film 1. The surface protection film has, for example, a support film and an adhesive layer disposed on at least one side of the support film. The adhesive layer of the surface protection film may also contain light release agents or conductive materials. When the adhesive layer of the surface protection film contains a conductive material, the surface protection film can be attached to the surface treatment layer and then the surface protection film can be peeled off, thereby making the surface treatment layer contain the conductive material and imparting a conductive function to the surface. The conductive material may include the things described in the conductive layer 2 previously. In order to impart conductivity to the surface of the surface treatment layer by peeling off the surface protection film, the adhesive layer of the surface protection film should contain both conductive material and light release agent. Examples of the light release agent include polysiloxane resins such as polyorganosiloxane. The conductive function imparted to the surface of the surface treatment layer can be appropriately adjusted by using the conductive material and the light release agent.

Other layers may also contain easy-to-bond layers to improve adhesion between components. When the other layer is an easy-to-bond layer, the easy-to-bond layer can also be arranged between the polarizing film 1 and the conductive layer 2. In addition, the surface on the conductive layer 2 side of the polarizing film 1 may be subjected to easy bonding treatments such as corona treatment, plasma treatment, etc., instead of the easy bonding layer.

[Method for manufacturing polarizing film with adhesive layer] The polarizing film 10 with the adhesive layer can be manufactured by the following method, for example. First, prepare a solution or dispersion of a conductive material. The solvent of the solution or dispersion is water, for example, and may further contain a water-soluble organic solvent. Water-soluble organic solvents include, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, secondary butanol, tertiary butanol, n-pentanol, isoamyl alcohol, secondary pentanol, Alcohols such as tertiary amyl alcohol, 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol and cyclohexanol.

Next, a solution or dispersion of a conductive material is coated on the surface of the polarizing film 1. By drying the obtained coating film, a conductive layer 2 can be formed on the polarizing film 1. In this way, a laminate L composed of the polarizing film 1 and the conductive layer 2 can be produced.

Next, prepare a solution containing an adhesive. By coating the solution on the surface of the separator, a coating film can be produced. The separator is not particularly limited. For example, a polyethylene terephthalate film treated with a silicone-based release agent can be used. Next, the coating film is dried, thereby forming the adhesive layer 3 on the separator. By transferring the obtained adhesive layer 3 to the conductive layer 2 of the laminate L, the polarizing film 10 with the adhesive layer can be produced.

(Modifications of Polarizing Film with Adhesive Layer) The polarizing film 10 with an adhesive layer may be further provided with other members other than the polarizing film 1, the conductive layer 2, and the adhesive layer 3. As shown in FIG. 2, the polarizing film 11 with an adhesive layer of this modification is further provided with an anti-reflection film 40. In the polarizing film 11 with the adhesive layer, the anti-reflection film 40, the polarizing film 1 and the adhesive layer 3 are arranged in order in the stacking direction. The anti-reflection film 40 may also be connected to the polarizing film 1. Except for the anti-reflective film 40, the structure of the polarizing film 11 with the adhesive layer is the same as the structure of the polarizing film 10 with the adhesive layer. Therefore, the common elements in the polarizing film 10 with the adhesive layer and the polarizing film 11 with the adhesive layer of the modified example will be given the same reference symbols and their description will be omitted. That is, the descriptions related to the following embodiments are applicable to each other as long as they are not technically contradictory. The following embodiments can be combined with each other as long as they are not technically contradictory.

As an example, the polarizing film 11 with the adhesive layer, in the state where the adhesive layer 3 has been laminated with the alkali-free glass in direct contact with the alkali-free glass, when the light from the CIE standard light source D65 comes from the adhesive layer 3 When the surface on the opposite side (typically the surface of the anti-reflection film 40) is incident, reflected light with a visual reflectivity Y of 1.1% or less is generated. The polarizing film 11 with the adhesive layer that generates the reflected light is suitable for suppressing the reflection of light on the liquid crystal panel so as to improve the visibility of the liquid crystal display device. In addition, the visual reflectance Y refers to the Y value of the tristimulus values (X, Y, and Z) in the XYZ color system (CIE1931). The tristimulus value is specified in JIS Z8701: 1999 in detail.

In detail, the above-mentioned visual reflectance Y can be specified by the following method. First, the adhesive layer 3 is used to attach the polarizing film 11 with the adhesive layer to the alkali-free glass. The alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide). Specifically, the weight ratio of the alkali component in the glass is, for example, 1000 ppm or less, and more 500 ppm or less. The alkali-free glass is, for example, plate-shaped and has a thickness of 0.5 mm or more. Next, a black film is attached to the surface of the non-alkali glass on the opposite side to the surface of the polarizing film 11 to which the adhesive layer has been attached. Then, the light from the CIE standard light source D65 was incident on the surface of the polarizing film 11 with the adhesive layer on the side of the anti-reflection film 40 at an incident angle of 5°. For the unidirectional reflected light generated at this time, the spectral reflectance of the wavelength range from 360nm to 740nm can be specified, and the visual reflectance Y in the XYZ color system (CIE1931) can be specified from the spectral reflectance.

The visual reflectance Y is preferably 1.0% or less, preferably 0.9% or less, more preferably 0.8% or less, and particularly preferably 0.7% or less. The lower limit of the visual reflectance Y is not particularly limited, for example, 0.1%.

^{The a*} value and b ^{* value in the L*} a ^* b ^* color system (CIE1976) of the above-mentioned reflected light are not particularly limited, but should satisfy the following relational expressions (1) and (2). -10≦a ^* ≦10...(1) -18≦b ^* ≦5...(2)

The above a ^* value and b ^* value are the tristimulus values (X, Y, and Z) in the XYZ color system using reflected light, using the following formulas (i) and (ii) specified in JIS Z8781-4: 2013 ) To specify. [Math 1]

The aforementioned a ^* value is preferably -6 or more and 6 or less, preferably -3 or more and 3 or less. The above-mentioned b ^* value is preferably -15 or more and 3 or less, preferably -10 or more and 2 or less, more preferably -6 or more and 2 or less, and particularly preferably -5 or more and 2 or less. Depending on the situation, the a ^* value and b ^* value may also satisfy the following relational expressions (3) and (4). b ^* ≧-1.5a ^* -15…(3) b ^* ≦-1.5a ^* +7.5…(4)

In addition, the a ^* value and b ^* value may also satisfy the following relational expressions (5) and (6). b ^* ≧-1.5a ^* -5…(5) b ^* ≦-1.5a ^* ＋4.5…(6)

^{The L*} value of the above-mentioned reflected light is, for example, 12 or less, and preferably 10 or less, preferably 8 or less, and more preferably 7 or less. The lower ^{limit of the L*} value is not particularly limited, and is 3, for example. The L ^* value can be specified using the above-mentioned tristimulus value and the following formula (iii) specified in JIS Z8781-4:2013. [Math 2]

The color difference ΔE between the light with L ^* value=0, a ^* value=0, and b ^* value=0 (light with a completely neutral hue) and the above-mentioned reflected light is, for example, 22 or less, preferably 18 or less, preferably 15 or less , More preferably 10 or less, particularly preferably 8 or less. The lower limit of the color difference ΔE is not particularly limited, and is 3, for example. The color difference ΔE can be calculated according to the following formula (iv) ^{using the L*} value, a ^* value, and b ^{* value of the reflected light.} ΔE ^* ＝{(L ^* ) ² ＋(a ^* ) ² ＋(b ^* ) ² } ^1/2 (iv)

[Anti-reflective film] As shown in FIG. 3, the anti-reflection film 40 has a first high refractive index layer 41, a first low refractive index layer 42, a second high refractive index layer 43, and a second low refractive index layer 44 in order in the stacking direction. The first high refractive index layer 41 is in contact with the polarizing film 1, for example. The second low-refractive index layer 44 is located, for example, at the side closest to the viewing side among the layers.

The high refractive index layers 41 and 43 have higher refractive index layers than the low refractive index layers 42 and 44, and the refractive index thereof is, for example, in the range of 1.6 to 3.2. The refractive index of the first high refractive index layer 41 and the second high refractive index layer 43 may be the same or different from each other. In this specification, the "refractive index", unless otherwise mentioned, means the value measured in accordance with JIS K0062:1992 using light with a wavelength of λ=550nm at a temperature of 25°C.

In an ideal form of the present invention, the high refractive index layers 41 and 43 include, for example, a binder resin and inorganic fine particles dispersed in the binder resin. The binder resin represents a cured product of a free-ray-curable resin, and more specifically, a cured product of an ultraviolet-curable resin. Examples of ultraviolet curable resins include resins containing polymers or oligomers having radically polymerizable substituents, such as (meth)acrylate resins. The (meth)acrylate resin as an ultraviolet curable resin includes, for example, polymers such as epoxy (meth)acrylate, polyester (meth)acrylate, acrylic (meth)acrylate, and (meth)acrylate ether. Or oligomers. The (meth)acrylate resin may further contain a radical polymerizable monomer (precursor) in addition to the above-mentioned polymer or oligomer. The molecular weight of the monomer is 200-700, for example. Specific examples of the monomer include neopentyl erythritol triacrylate (PETA: molecular weight 298), neopentyl glycol diacrylate (NPGDA: molecular weight 212), and dineopentyl erythritol hexaacrylate (DPHA: molecular weight 632) , Dineopentylerythritol pentaacrylate (DPPA: molecular weight 578), trimethylolpropane triacrylate (TMPTA: molecular weight 296). Free radiation-curable resins can also contain initiators as required. Examples of the initiator include UV radical generators (IRGACURE 907, IRGACURE 127, IRGACURE 192 manufactured by Ciba Specialty Chemicals, etc.) or benzyl peroxide. The above-mentioned binder resin may contain other resins in addition to the cured product of the free-ray-curable resin. Other resins may be thermosetting resins or thermoplastic resins. Examples of other resins include aliphatic resins (for example, polyolefins), urethane resins, and the like.

The refractive index of the binder resin is, for example, 1.40 to 1.60. Relative to 100 parts by weight of the formed high refractive index layer, the blending amount of the binder resin is, for example, 10 parts by weight to 80 parts by weight, and preferably 20 parts by weight to 70 parts by weight.

The material of the inorganic fine particles is, for example, a metal oxide. Specific examples of metal oxides include zirconia (zirconium) (refractive index: 2.19), alumina (refractive index: 1.56 to 2.62), titanium oxide (refractive index: 2.49 to 2.74), and silica (refractive index: 1.25~1.46). These metal oxides not only have low light absorption, but also have a higher refractive index than organic materials such as free-ray hardening resins or thermoplastic resins. Therefore, they are suitable for adjusting the refractive index of the high refractive index layers 41 and 43. The inorganic fine particles preferably contain zirconium oxide or titanium oxide.

The refractive index of the inorganic fine particles is, for example, above 1.60, and preferably 1.70 to 2.80, preferably 2.00 to 2.80. Inorganic particles having a refractive index of 1.60 or more are suitable for adjusting the refractive index of the high refractive index layers 41 and 43. The average particle diameter of the inorganic fine particles is, for example, 1 nm to 100 nm, and preferably 10 nm to 80 nm, and more preferably 20 nm to 70 nm. The average particle size of the inorganic fine particles means the particle size (d50) corresponding to 50% of the cumulative volume in the particle size distribution measured with a laser diffraction particle size meter, for example.

Inorganic particles may not be surface modified, but they should be surface modified. The surface-modified inorganic particles tend to be well dispersed in the binder resin. The surface modification system is performed, for example, by coating a surface modifying agent on the surface of the inorganic fine particles to form a surface modifying agent layer. Examples of surface modifiers include coupling agents such as silane coupling agents and titanate coupling agents; and surfactants such as fatty acid-based surfactants. If the surface modifier is used, the wettability of the binder resin and the inorganic fine particles is improved, and the interface between the binder resin and the inorganic fine particles tends to be stabilized.

With respect to 100 parts by weight of the formed high refractive index layer, the blending amount of the inorganic fine particles is, for example, 10 parts by weight to 90 parts by weight, preferably 20 parts by weight to 80 parts by weight. As long as the blending amount of the inorganic fine particles is within the above range, the anti-reflection film has sufficient mechanical properties and at the same time can sufficiently reduce the visual reflectance Y of the reflected light.

The refractive index of the high refractive index layers 41 and 43 containing the binder resin and inorganic fine particles is, for example, 1.6 to 2.6, and preferably 1.7 to 2.2.

In another ideal form of the present invention, the high refractive index layers 41 and 43 contain metal oxide or metal nitride, and preferably are substantially composed of metal oxide or metal nitride. Specific examples of metal oxides include titanium oxide (TiO ₂ ), indium/tin oxide (ITO), niobium oxide (Nb ₂ O ₅ ), yttrium oxide (Y ₂ O ₃ ), and indium oxide (In ₂ O ₃ ) , Tin oxide (SnO ₂ ), zirconium oxide (ZrO ₂ ), hafnium oxide (HfO ₂ ), antimony oxide (Sb ₂ O ₃ ), tantalum oxide (Ta ₂ O ₅ ), zinc oxide (ZnO), tungsten (WO ₃ ). A specific example of the metal nitride can be silicon nitride (Si ₃ N ₄ ). The high refractive index layers 41 and 43 preferably include niobium oxide (Nb ₂ O ₅ ) or titanium oxide (TiO ₂ ). The refractive index of the high refractive index layer made of metal oxide or metal nitride is, for example, 2.00-2.60, and preferably 2.10-2.45.

The material of the first high refractive index layer 41 and the second high refractive index layer 43 may be the same or different from each other.

The physical film thickness of the first high refractive index layer 41 is, for example, 9 nm to 15 nm, and preferably 11 nm to 13 nm. The optical film thickness of the first high refractive index layer 41 is, for example, 20 nm to 35 nm, and preferably 25 nm to 30 nm. In this specification, the optical film thickness is a value expressed as the product of the refractive index of light with a wavelength of 550 nm and the physical film thickness.

The physical film thickness of the second high refractive index layer 43 is, for example, 98 nm to 124 nm, and preferably 111 nm to 120 nm. The optical film thickness of the second high refractive index layer 43 is, for example, 230 nm to 290 nm, and preferably 260 nm to 280 nm.

The low refractive index layers 42 and 44 are layers having a lower refractive index than the high refractive index layers 41 and 43, and the refractive index thereof is, for example, 1.35 to 1.55, and preferably 1.40 to 1.50. By appropriately adjusting the refractive index difference between the low refractive index layers 42 and 44 and the high refractive index layers 41 and 43, the light reflection tends to be suppressed. The refractive index of the first low refractive index layer 42 and the second low refractive index layer 44 may be the same or different from each other.

The materials of the low refractive index layers 42 and 44 can be, for example, metal oxides and metal fluorides. A specific example of the metal oxide can be silicon oxide (SiO ₂ ). Specific examples of metal fluorides include magnesium fluoride and fluorosilicic acid. The materials of the low refractive index layers 42 and 44 are preferably magnesium fluoride and fluorosilicic acid from the point of view of refractive index; if the material is made of silicon oxide from the point of view of ease of manufacture, mechanical strength, and moisture resistance; if Considering various characteristics, silicon oxide is better. The material of the first low refractive index layer 42 and the second low refractive index layer 44 may be the same or different from each other.

The material of the low refractive index layers 42 and 44 may also be a cured product of a curable fluorine-containing resin. The curable fluorine-containing resin has, for example, a structural unit derived from a fluorine-containing monomer and a structural unit derived from a crosslinkable monomer. Specific examples of fluorine-containing monomers include, for example, fluoroolefins (ethylene fluoride, vinylidene fluoride, tetrafluoroethylene, hexafluoroethylene, hexafluoropropylene, perfluoro-2,2-dimethyl-1,3-two㗁er, etc.), (meth)acrylate derivatives with partially or completely fluorinated alkyl groups (Viscoat 6FM (manufactured by Osaka Organic Chemical Co., Ltd.), M-2020 (manufactured by Daikin), etc.), fully or partially fluorinated Chemicals of vinyl ethers, etc. Examples of crosslinkable monomers include: (meth)acrylate monomers having crosslinkable functional groups in the molecule such as glycidyl methacrylate; those having functional groups such as carboxyl group, hydroxyl group, amino group, and sulfonic acid group (Meth)acrylate monomers ((meth)acrylic acid, hydroxymethyl (meth)acrylate, hydroxyalkyl (meth)acrylate, allyl (meth)acrylate, etc.). The fluorine-containing resin may have structural units derived from other monomers (for example, olefin-based monomers, (meth)acrylate-based monomers, and styrene-based monomers) other than the above-mentioned compounds.

The physical film thickness of the first low refractive index layer 42 is, for example, 26 nm to 34 nm, and preferably 27 nm to 31 nm. The optical film thickness of the first low refractive index layer 42 is, for example, 38 nm to 50 nm, and preferably 40 nm to 45 nm.

The physical film thickness of the second low refractive index layer 44 is, for example, 68 nm to 88 nm, and preferably 72 nm to 79 nm. The optical film thickness of the second low refractive index layer 44 is, for example, 100 nm to 128 nm, and preferably 105 nm to 115 nm.

The manufacturing method of the high refractive index layer and the low refractive index layer is not particularly limited. When the layers contain resin, the layers can be formed by a so-called wet process (the resin composition is applied and then cured). When the layers are composed of metal oxide, metal fluoride, metal nitride, etc., the layers can be formed by a so-called dry process. Specific examples of the dry process include PVD (Physical Vapor Deposition) method and CVD (Chemical Vapor Deposition) method. The PVD method includes, for example, a vacuum vapor deposition method, a reactive vapor deposition method, an ion beam assist method, a sputtering method, and an ion plating method. The CVD method includes, for example, a plasma CVD method. From the standpoint of reducing the color difference of the reflected light, the sputtering method is better for the dry process.

The anti-reflection film 40 of FIG. 3 may further have other components besides the high refractive index layer and the low refractive index layer. Figure 4 shows another example of the anti-reflection film. The anti-reflection film 47 of FIG. 4 further has a base material 45 and an adhesive layer 46. The base material 45 is, for example, arranged between the first high refractive index layer 41 and the polarizing film 1 and is in contact with the first high refractive index layer 41. The adhesive layer 46 is, for example, disposed between the substrate 45 and the polarizing film 1, and is in contact with the substrate 45 and the polarizing film 1, respectively.

The base material 45 includes, for example, a resin film having transparency. The material of the resin film can include, for example, cellulosic resins (triacetyl cellulose, diacetyl cellulose, acryl cellulose, butyl cellulose, acetyl cellulose, nitrocellulose, etc.), poly Amide resins (nylon-6, nylon-66, etc.), polyimide resins, polycarbonate resins, polyester resins (polyethylene terephthalate, polyethylene naphthalate, etc.) Poly 1,4-cyclohexane dimethyl terephthalate, polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate, polybutylene terephthalate Etc.), polyolefin-based resins (polyethylene, polypropylene, polymethylpentene, etc.), polyether-based resins, polyether-based resins, polyarylate-based resins, polyetherimide-based resins, polymethyl Methyl acrylate resin, polyetherketone resin, polystyrene resin, polyvinyl chloride resin, polyvinyl alcohol resin, ethylene vinyl alcohol resin, (meth)acrylic resin, (meth)acrylonitrile resin, etc. . The base material 45 may be a layer of a single resin film, a laminate of multiple resin films, or a laminate of a resin film and a hard coat layer described later. The base material 45 may also contain additives. Specific examples of additives include antistatic agents, ultraviolet absorbers, plasticizers, lubricants, colorants, antioxidants, flame retardants, and the like.

In an ideal form of the present invention, the substrate 45 is a triacetyl cellulose (TAC) film. The triacetyl cellulose film can also function as a protective film for polarizers. Therefore, by using the anti-reflection film 47 having the base material 45 composed of a triacetyl cellulose film, the transparent protective film of the polarizing film 1 on the viewing side can be omitted.

In another ideal form of the present invention, the substrate 45 includes a hard coat layer. The base material 45 may be composed of a hard coat layer, or may be a laminate of a resin film and a hard coat layer. The hard coat layer is, for example, a hardened layer of free radiation-curable resin. Examples of free rays include ultraviolet rays, visible light, infrared rays, and electron beams, and ultraviolet rays are preferred. That is, the free radiation-curable resin is preferably an ultraviolet-curable resin. Examples of ultraviolet curable resins include (meth)acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, epoxy resins, and the like. The (meth)acrylic resin includes, for example, a cured product (polymer) obtained by curing a polyfunctional monomer containing a (meth)acryloyloxy group with ultraviolet rays. For example, a polyfunctional monomer can be used 1 type or in combination of 2 or more types. The polyfunctional monomer can be used in combination with, for example, a photopolymerization initiator.

Inorganic particles or organic particles may be dispersed in the hard coat layer. The average particle size (d50) of the fine particles is, for example, 0.01 µm to 3 µm. The fine particles dispersed in the hard coat layer are _{preferably silica (SiO 2} ) from the viewpoint of refractive index, stability, and heat resistance. The hard coat layer may also contain additives. Specific examples of additives include leveling agents, fillers, dispersants, plasticizers, ultraviolet absorbers, surfactants, antioxidants, and thixotropic agents. In addition, the surface of the hard coat layer may be formed with uneven shapes. The hard coat with uneven surface has a light diffusion function (anti-glare).

The physical film thickness of the base material 45 is not particularly limited. When the substrate 45 is a layer of a single resin film or a laminate of multiple resin films, the physical film thickness of the substrate 45 is, for example, in the range of 10 μm to 200 μm. When the base material 45 contains a hard coat layer, the physical film thickness of the hard coat layer is, for example, in the range of 1 μm to 50 μm.

The refractive index of the base material 45 (when the base material 45 has a laminated structure, the refractive index of the layer closest to the first high refractive index layer 41) is, for example, 1.3 to 1.8, and preferably 1.4 to 1.7.

The adhesive layer 46 is a layer containing an adhesive. The adhesive contained in the adhesive layer 46 may be, for example, a resin having adhesiveness. Examples of such resins include acrylic resins, acrylic urethane resins, urethane resins, and silicone resins. The adhesive layer 46 preferably contains an acrylic adhesive composed of acrylic resin.

The adhesive layer 46 may further contain additives as required. Additives include, for example, crosslinking agents, tackifiers, plasticizers, pigments, dyes, fillers, anti-aging agents, conductive materials, ultraviolet absorbers, light stabilizers, peeling regulators, softeners, surfactants, and anti-aging agents. Burning agent, antioxidant, etc. Examples of the crosslinking agent include isocyanate-based crosslinking agents, epoxy-based crosslinking agents, peroxide-based crosslinking agents, melamine-based crosslinking agents, urea-based crosslinking agents, metal alkoxide-based crosslinking agents, and metal chelate. Compound-based cross-linking agents, metal salt-based cross-linking agents, carbodiimide-based cross-linking agents, oxazoline-based cross-linking agents, aziridine-based cross-linking agents, amine-based cross-linking agents, etc.

The physical film thickness of the adhesive layer 46 is, for example, 5 μm to 100 μm, and preferably 10 μm to 50 μm.

The anti-reflective film 47 may further have other members other than the base material 45 and the adhesive layer 46. The anti-reflection film 47 may further have an anti-glare layer disposed between the base material 45 and the first high refractive index layer 41, for example. The anti-reflection film 47 may further have an adhesion layer disposed between specific members (for example, between the base material 45 and the first high refractive index layer 41, or between the anti-glare layer and the first high refractive index layer 41). The adhesion layer is a layer that can improve the adhesion between the components, and includes, for example, silicon or SiO _x (x <2). The physical film thickness of the adhesion layer is, for example, 1 nm to 10 nm, preferably 2 nm to 5 nm. The refractive index of the adhesion layer is, for example, 1 to 2.5.

The anti-reflection films 40 and 47 may further have an anti-fouling layer arranged on the visible side of the second low-refractive index layer 44 and in contact with the second low-refractive index layer 44. The antifouling layer is a layer having an antifouling effect, and it contains, for example, at least one selected from the group consisting of fluorine-based resin and silicone-based resin. The physical film thickness of the antifouling layer is, for example, 5 nm to 13 nm, and preferably 5 nm to 10 nm. The refractive index of the antifouling layer is, for example, 1~2.

For the reflected light generated when light enters the anti-reflection films 40 and 47 from the CIE standard light source D65, the smaller the absolute value of _{the a 1} ^* value and the b ₁ ^{* value in the L*} a ^* b ^* color system, the better. The a ₁ ^* value is, for example, -6 or more and 6 or less, preferably -3 or more and 3 or less. The b ₁ ^* value is, for example, -15 or more and 3 or less, preferably -10 or more and 2 or less, and preferably -5 or more and 2 or less. The a ₁ ^* value and b ₁ ^* value can be specified by the following methods. First, the first high refractive index layer 41, the first low refractive index layer 42, the second high refractive index layer 43, and the second low refractive index layer 44 of the anti-reflection film 40 are sequentially laminated on the black film, or through anti-reflection The adhesive layer 46 of the film 47 attaches the anti-reflection film 47 to the black film. Next, the light from the CIE standard light source D65 was made incident on the surface of the anti-reflection film 40 or 47 on the side of the second low refractive index layer at an incident angle of 5°. The unidirectional reflected light generated at this time specifies the spectral reflectance in the range of 360nm to 740nm, and then the tristimulus value of the XYZ color system is specified from the spectral reflectance. _{Using the obtained tristimulus value, the a 1} ^* value and the b ₁ ^* value are specified by the above formulas (i) and (ii).

_{The visual reflectance Y 1 of the} above-mentioned reflected light is, for example, 0.3% or less, and preferably 0.2% or less.

(Another modification of polarizing film with adhesive layer) The polarizing film 11 with an adhesive layer may be further provided with other members besides the above-mentioned members. As shown in FIG. 5, the polarizing film 12 with an adhesive layer used in this modification further includes a transparent substrate 50 and an adhesive layer 55 disposed between the anti-reflection film 40 and the polarizing film 1. Except for the transparent substrate 50 and the adhesive layer 55, the structure of the polarizing film 12 with the adhesive layer is the same as the structure of the polarizing film 11 with the adhesive layer.

The transparent substrate 50 is in contact with the first high refractive index layer 41 of the anti-reflection film 40, for example. However, the polarizing film 12 with the adhesive layer can also have the anti-reflection film 47 illustrated in FIG. 4 instead of the anti-reflection film 40. At this time, the adhesive layer 46 of the anti-reflection film 47 is in contact with the transparent substrate 50. The adhesive layer 46 is, for example, disposed between the transparent substrate 50 and the polarizing film 1, and is connected to the transparent substrate 50 and the polarizing film 1, respectively.

As the transparent substrate 50, the first transparent substrate 6 and the second transparent substrate 7 included in the liquid crystal cell 20 described later can be used. The transparent substrate 50 is preferably made of glass. In this specification, the transparent substrate 50 made of glass is sometimes referred to as "cover glass".

The adhesive layer 55 can use what was previously described for the adhesive layer 3. In particular, the adhesive layer 55 preferably contains a commercially available optical clear adhesive (OCA: Optical Clear Adhesive). The adhesive layer 55 can be formed using, for example, an adhesive tape such as LUCIACS (registered trademark) CS9621T.

(Implementation form of liquid crystal panel) As shown in FIG. 6, the liquid crystal panel 100 includes a polarizing film 10 with an adhesive layer and a liquid crystal cell 20. In the liquid crystal panel 100, the polarizing film 11 or 12 with an adhesive layer can also be used instead of the polarizing film 10 with an adhesive layer. The polarizing film 10 with the adhesive layer is directly or indirectly connected to the liquid crystal cell 20. For example, there is no conductive layer, such as an ITO layer, between the polarizing film 10 with the adhesive layer and the liquid crystal cell 20. A layer other than the conductive layer may also be arranged between the polarizing film 10 with the adhesive layer and the liquid crystal cell 20. The liquid crystal cell 20 is attached to the adhesive layer 3 of the polarizing film 10 with the adhesive layer, and can be directly connected to the polarizing film 10 with the adhesive layer.

The liquid crystal cell 20 includes, for example, a liquid crystal layer 5, a first transparent substrate 6 and a second transparent substrate 7. The liquid crystal layer 5 is arranged, for example, between the first transparent substrate 6 and the second transparent substrate 7, and is in contact with the first transparent substrate 6 and the second transparent substrate 7, respectively. The first transparent substrate 6 is in contact with the adhesive layer 3 of the polarizing film 10 with the adhesive layer, for example. For example, the liquid crystal cell 20 does not have an ITO layer between the first transparent substrate 6 and the adhesive layer 3 of the polarizing film 10 with the adhesive layer. In other words, the liquid crystal panel 100 does not have an ITO layer between the first transparent substrate 6 and the adhesive layer 3, for example.

The liquid crystal layer 5 includes, for example, liquid crystal molecules aligned in parallel in the absence of an electric field. The liquid crystal layer 5 containing the liquid crystal molecules is suitable for the IPS (In-Plane Switching) method. However, the liquid crystal layer 5 can also be used for TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, π type, VA (Vertical Alignment) type, etc. The thickness of the liquid crystal layer 5 is, for example, 1.5 μm to 4 μm.

Examples of materials for the first transparent substrate 6 and the second transparent substrate 7 include glass and polymers. In this specification, a transparent substrate made of polymer is sometimes referred to as a polymer film. Examples of the polymer constituting the transparent substrate include polyethylene terephthalate, polycycloolefin, and polycarbonate. The thickness of the transparent substrate made of glass is, for example, 0.1 mm to 1 mm. The thickness of the transparent substrate made of polymer is, for example, 10 µm to 200 µm.

The liquid crystal cell 20 may further include layers other than the liquid crystal layer 5, the first transparent substrate 6 and the second transparent substrate 7. Examples of other layers include color filters, easy-to-bond layers, and hard coats. The color filter is, for example, arranged at a side closer to the visibility side than the liquid crystal layer 5, and is suitably located between the first transparent substrate 6 and the adhesive layer 3 of the polarizing film 10 to which the adhesive layer is attached. The easy bonding layer and the hard coat layer are arranged on the surface of the first transparent substrate 6 or the second transparent substrate 7, for example.

The liquid crystal panel 100 may further have a conductive structure (not shown) electrically connected to the side surface of the conductive layer 2. If the conductive structure is grounded, the polarizing film 10 with the adhesive layer can be prevented from being charged by static electricity. The conductive structure can cover the entire side surface of the conductive layer 2 or partially cover the side surface of the conductive layer 2. The area ratio of the area covered by the conductive structure on the side surface of the conductive layer 2 to the entire area of the side surface of the conductive layer 2 is, for example, 1% or more, and preferably 3% or more. The conductive structure can be electrically connected not only with the side surface of the conductive layer 2 but also with the side surface of the polarizing film 1 and the adhesive layer 3.

The conductive structure can be made of conductive paste made of metals such as silver, gold, conductive adhesive, and other conductive materials. The conductive structure may also be wiring extending from the side surface of the conductive layer 2.

The liquid crystal panel 100 may be further provided with other optical films other than the polarizing film 1. Examples of other optical films include films used in liquid crystal display devices such as polarizing films, reflecting plates, retro-transmission plates, retardation films, viewing angle compensation films, and brightness enhancement films. The retardation film includes, for example, a half-wavelength plate, a quarter-wavelength plate, and the like. The liquid crystal panel 100 may include one or more of these other optical films.

When the other optical film is a polarizing film, the polarizing film is bonded to the second transparent substrate 7 of the liquid crystal cell 20 through, for example, an adhesive layer. The polarizing film has, for example, the above-mentioned structure for the polarizing film 1. In a polarizing film as another optical film, the transmission axis (or absorption axis) of the polarizer is orthogonal to the transmission axis (or absorption axis) of the polarizer in the polarizing film 1, for example. The material used for bonding the polarizing film and the adhesive layer of the second transparent substrate 7 can be the one previously described for the adhesive layer 3. The thickness of the adhesive layer is not particularly limited. For example, it can be 1-100 µm, preferably 2-50 µm, preferably 2-40 µm, and more preferably 5-35 µm.

The liquid crystal panel 100 provided with the polarizing film 10 with the adhesive layer showed good results when subjected to ESD (Electro-Static Discharge Test). The ESD test can be implemented in the following method, for example. First, the liquid crystal panel 100 is installed on the backlight device. Next, static electricity is applied to the viewing side of the liquid crystal panel 100 (the side of the polarizing film 1). The application of static electricity is to use an Electrostatic Discharge Gun (Electrostatic Discharge Gun) whose applied voltage is adjusted to 15kV. If static electricity is applied, a part of the liquid crystal panel 100 will become white. The time T from the application of static electricity to the disappearance of the white part is measured. In the liquid crystal panel 100, the time T is, for example, 10 seconds or less, preferably 1 second or less, and more preferably 0.5 second or less. In addition, the ESD test was conducted under the conditions of 23°C and 55% RH.

The liquid crystal panel 100 is suitable for applications that do not require a touch sensor, such as vehicle dashboards and mirror displays. The dashboard is a panel that displays the speed of the vehicle or the number of engine revolutions.

(Modification of LCD panel) The liquid crystal panel 100 of FIG. 6 may further have a touch sensor or a touch panel. FIG. 7 shows a liquid crystal panel 110 equipped with a touch panel 30. Except for the touch panel 30, the structure of the liquid crystal panel 110 is the same as that of the liquid crystal panel 100. Therefore, the elements common to the liquid crystal panel 100 and the liquid crystal panel 110 will be given the same reference numerals, and their descriptions will be omitted.

In the liquid crystal panel 110, the touch panel 30 is, for example, disposed on the side of the polarizing film 1 to be more visible. The touch panel 30 is not in contact with the polarizing film 10 with the adhesive layer, and a gap (air layer) is formed between the touch panel 30 and the polarizing film 10 with the adhesive layer. The liquid crystal panel 110 is a so-called plug-in liquid crystal panel. The touch panel 30 may adopt an optical type, an ultrasonic type, a capacitive type, a resistive film type, and the like. When the touch panel 30 is a resistive film type, the touch panel 30 has, for example, a structure in which two electrode plates with a transparent conductive film are arranged in opposite directions through a spacer. When the touch panel 30 is a capacitive type, the touch panel 30 is composed of, for example, a transparent conductive film having a transparent conductive film having a predetermined pattern shape.

(Implementation mode of liquid crystal display device) The liquid crystal display device of this embodiment includes, for example, a liquid crystal panel 100 and an illumination system. In the liquid crystal display device, the liquid crystal panel 110 described with reference to FIG. 7 can also be used instead of the liquid crystal panel 100. In the liquid crystal display device, the liquid crystal panel 100 is, for example, arranged at a position closer to the viewing side than the lighting system. The lighting system has, for example, a backlight or a reflective plate, and irradiates the liquid crystal panel 100 with light. Example

The following examples illustrate the present invention in more detail. The present invention is not limited by the examples shown below. In addition, unless otherwise specified below, "%" means "% by weight", "parts" means "parts by weight", and thickness" means "physical film thickness". Unless otherwise specified, the indoor temperature and humidity are 23°C and 65%RH.

<Weight average molecular weight of meth)acrylic polymer> In the following examples, the weight average molecular weight (Mw) of (meth)acrylic polymer is measured by GPC (Gel Permeation Chromatography). The Mw/Mn of the (meth)acrylic polymer was also measured in the same way.・Analysis device: manufactured by Tosoh Corporation, HLC-8120GPC ・Column: manufactured by Tosoh Corporation, G7000H _XL ＋GMH _XL ＋GMH _XL・Column size: 7.8mmφ×30cm each, 90cm in total ・Column temperature: 40°C 0.8mL/min ・Injection volume: 100µL ・Eluent: Tetrahydrofuran ・Detector: Differential Refractometer (RI) ・Standard sample: Polystyrene

<About Examples and Comparative Examples of Polarizing Films with Adhesive Layers Without Anti-reflective Film> (Example 1) [TAC Film with Hard Coat] First, prepare a resin solution, which is dissolved in butyl acetate There are UV-curable resin monomers or oligomers containing urethane acrylate as the main component (manufactured by DIC Corporation, trade name: UNIDIC 17-806, solid content concentration: 80%). With respect to 100 parts of the solid content of the resin solution, 5 parts of a photopolymerization initiator (manufactured by BASF, trade name: IRGACURE907) and 0.1 part of a leveling agent (manufactured by DIC, trade name: GRANDIC PC4100) were added to the resin solution . Next, cyclopentanone and propylene glycol monomethyl ether were added to the resin solution at a weight ratio of 45:55 to adjust the solid content concentration in the tree solution to 36%. In this way, a hard coat layer forming material is produced. The obtained forming material was coated on a transparent protective film (TAC film manufactured by Konica Minolta, trade name "KC4UY") containing triacetyl cellulose with a thickness of 40 µm to form a coating film. At this time, the thickness of the coating film was adjusted so that the thickness of the hard coat layer obtained by hardening the forming material was adjusted to 7 µm. Next, the coating film was dried at 90°C for 1 minute, and then the coating film was irradiated with ultraviolet rays with a ^{cumulative light intensity of 300 mJ/cm 2 with a high-pressure mercury lamp.} This hardens the coating film to produce a hard coat (HC) TAC film.

[Polarizing Film] First, between a plurality of rollers with different speed ratios, a polyvinyl alcohol film with a thickness of 80 µm is dyed in a 0.3% iodine solution (temperature 30°C) for 1 minute, and stretched simultaneously to achieve a stretching ratio of 3 Times. Next, the obtained stretched film was immersed in an aqueous solution (temperature 60° C.) with a boric acid concentration of 4% and a potassium iodide concentration of 10% for 0.5 minutes and stretched simultaneously so that the total stretch magnification reached 6 times. Next, the stretched film was immersed in a 1.5% potassium iodide-containing aqueous solution (temperature 30°C) for 10 seconds to wash it. Next, the stretched film was dried at 50°C for 4 minutes, thereby producing a polarizing member with a thickness of 30 µm. A transparent protective film (thickness 30 µm) composed of a modified acrylic polymer with a lactone ring structure was bonded to one main surface of the prepared polarizer through a polyvinyl alcohol-based adhesive. The TAC film (thickness 47µm) with the hard coat layer was bonded to the other main surface of the polarizer through a polyvinyl alcohol-based adhesive. At this time, the other main surface of the polarizer is joined to the transparent protective film. The bonding of the polarizer and the transparent protective film is performed using a roll laminator. After joining the polarizer and the transparent protective film, the resulting laminate was heated and dried at 70° C. for 5 minutes in an oven, thereby obtaining a laminate L1 composed of a hard coat layer and a polarizing film.

[Conductive layer] First, 50 parts of a solution containing PEDOT/PSS (Denatron PT-436 manufactured by Nagase ChemteX Co.) and 50 parts of water are mixed to prepare a coating liquid with a solid content concentration of 0.5% by weight. Next, the coating liquid was applied to the surface of the layered body L1 on the side of the polarizing film. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. In this way, a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer was produced. The thickness of the conductive layer is 30 nm.

[Adhesive layer] First, a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler was charged with 76.9 parts of butyl acrylate, 18 parts of benzyl acrylate, 5 parts of acrylic acid, and 0.1 part of 4-hydroxybutyl acrylate to prepare The monomer mixture is obtained. Then, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was fed with 100 parts of ethyl acetate with respect to 100 parts of the monomer mixture (solid content). While slowly stirring the mixture, nitrogen gas was introduced into the flask to perform nitrogen substitution. By maintaining the liquid temperature in the flask at around 55°C for 8 hours, the polymerization reaction was carried out to prepare a solution of acrylic polymer with a weight average molecular weight (Mw) of 1.9 million and Mw/Mn=3.7.

Next, with respect to 100 parts of the solid content of the acrylic polymer solution, 0.45 parts of isocyanate crosslinking agent (Coronate L manufactured by Tosoh Corporation, trimethylolpropane toluene diisocyanate), benzene peroxide 0.1 part of formaldehyde (NYPER BMT manufactured by Nippon Oil & Fat Co., Ltd.) and 0.2 part of γ-glycidoxypropyl methoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.: KBM-403) to prepare an acrylic adhesive composition物的Solution.

Next, the obtained solution was applied to one side of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.). The separation part is a polyethylene terephthalate film treated with a silicone release agent. The obtained coating film was dried at 155° C. for 1 minute, thereby forming an adhesive layer on the surface of the separator. The thickness of the adhesive layer is 20µm.

[Polarizing film with adhesive layer] Next, the obtained adhesive layer was transferred onto the conductive layer of the laminate L2, thereby producing the adhesive layer-attached polarizing film of Example 1.

(Example 2) In the acrylic polymer solution, 1 part of lithium bis(trifluoromethanesulfonyl) imide manufactured by Mitsubishi Materials Co., Ltd. is further blended to prepare a solution of acrylic adhesive composition. The adhesive layer-attached polarizing film of Example 2 was produced in the same manner as in Example 1.

(Examples 3 and 4) The coating solution of PEDOT/PSS was applied to the polarizing film so that the thickness of the conductive layer became 20nm and 90nm, respectively, except that the adhesive layers of Examples 3 and 4 were produced in the same way as in Example 1. Polarizing film.

(Example 5) Except that a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer was produced in the following method, the adhesive layer-attached polarizing film of Example 5 was produced in the same manner as in Example 1. First, 9 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase ChemteX Co.) and 91 parts of water were mixed to prepare a coating liquid with a solid content concentration of 0.27% by weight. Next, the coating liquid is applied to the main surface of the layered body L1 on the polarizing film side. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. In this way, a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer was produced. The thickness of the conductive layer is 100 nm.

(Example 6) Polyurethane resin (SUPERFLEX 210 manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) was further added to the coating solution used to make the conductive layer, except that it was made in the same way as in Example 1. The polarizing film with adhesive layer of Example 6. The content of the polyurethane resin in the conductive layer of Example 6 was 50% by weight.

(Example 7) Polyurethane-based resin (SUPERFLEX 210 manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) was further added to the coating solution used to make the conductive layer, except that it was made in the same way as in Example 2. The polarizing film with adhesive layer of Example 7. The content of the polyurethane resin in the conductive layer of Example 7 was 50% by weight.

(Example 8) A solution of an acrylic polymer containing an azolinyl group (EPOCROS WS-700 manufactured by Nippon Shokubai Co., Ltd.) as a binder was further added to the coating solution for making the conductive layer. Other than that, the same as in Example 1 The adhesive layer-attached polarizing film of Example 8 was produced in the same manner. The content of the oxazoline group-containing acrylic polymer in the conductive layer of Example 8 was 50% by weight.

(Example 9) A solution of an acrylic polymer containing an azoline group as a binder (EPOCROS WS-700 manufactured by Nippon Shokubai Co., Ltd.) was further added to the coating solution used to make the conductive layer. Other than that, the same as in Example 2 The adhesive layer-attached polarizing film of Example 9 was produced in the same manner. The content of the oxazoline group-containing acrylic polymer in the conductive layer of Example 9 was 50% by weight.

(Example 10) The PEDOT/PSS coating solution was applied to the polarizing film so that the thickness of the conductive layer became 5 nm, except that the adhesive layer-attached polarizing film of Example 10 was produced in the same manner as in Example 1.

(Example 11) The PEDOT/PSS coating solution was applied to the polarizing film so that the thickness of the conductive layer became 5 nm, except that the adhesive layer-attached polarizing film of Example 11 was produced in the same manner as in Example 2.

(Example 12) The PEDOT/PSS coating solution was applied to the polarizing film so that the thickness of the conductive layer became 150 nm, except that the adhesive layer-attached polarizing film of Example 12 was produced in the same manner as in Example 1.

(Comparative example 1) The PEDOT/PSS coating solution was applied to the polarizing film so that the thickness of the conductive layer became 15 nm, except that the adhesive layer-attached polarizing film of Comparative Example 1 was produced in the same manner as in Example 5.

(Comparative example 2) The adhesive layer-attached polarizing film of Comparative Example 2 was manufactured in the same manner as in Example 1, except that a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer was manufactured according to the following method. First, 36.5 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase ChemteX Co.) and 63.5 parts of water were mixed to prepare a coating liquid with a solid content concentration of 1.1% by weight. Next, the coating liquid is applied to the main surface of the layered body L1 on the polarizing film side. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. In this way, a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer was produced. The thickness of the conductive layer is 350 nm.

(Comparative example 3) Except that the conductive layer was not formed, the polarizing film with the adhesive layer of Comparative Example 3 was manufactured in the same manner as in Example 1.

(Comparative Example 4) The PEDOT/PSS coating solution was applied to the polarizing film so that the thickness of the conductive layer became 230 nm, except that the adhesive layer-attached polarizing film of Comparative Example 4 was produced in the same manner as in Example 1.

The following evaluations were performed for Examples 1 to 12 and Comparative Examples 1 to 4. The evaluation results are shown in Table 1 and FIG. 8.

＜Loss of total light transmittance A＞ First, at the stage of producing a laminate L1 composed of a hard coat layer and a polarizing film, the total light transmittance T3 of the laminate L1 is measured. The total light transmittance T3 is measured in accordance with JIS K7361-1: 1997, using a spectrophotometer (V7100 manufactured by JASCO Corporation). The total light transmittance of the layered body L1 was measured by making light enter from the hard coat layer side. In the same way, the total light transmittance T4 of the laminate L2 was measured at the stage of producing the laminate L2 composed of the hard coat layer, the polarizing film, and the conductive layer. The total light transmittance T4 of the layered body L2 was measured by making light enter from the hard coat layer side. The difference (T3-T4) between the total light transmittance T3 and the total light transmittance T4 is calculated, and the calculated value is regarded as the total light transmittance loss A caused by the conductive layer.

＜Surface resistivity＞ Using a laminate L2 composed of a hard coat layer, a polarizing film, and a conductive layer, the surface resistivity of the conductive layer was measured. In Example 5, Comparative Example 1 and Comparative Example 2, the surface resistivity of the conductive layer was measured using a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech) according to the method specified in JIS K6911: 1995 get on. The measurement conditions are that the applied voltage is 10V and the application time is 10 seconds. In Examples 1 to 4, 6 to 12, and Comparative Example 4, the surface resistivity of the conductive layer was measured using a resistivity meter (Loresta-GP MCP-T600 manufactured by Mitsubishi Chemical Analytech) and was based on JIS K7194: 1994 The method is carried out. The measurement conditions are that the applied voltage is 10V and the application time is 10 seconds. Then, for Examples 1 to 12 and Comparative Examples 1 to 4, at the stage of making the adhesive layer on the separator, a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech) was used to measure the adhesive layer The surface resistivity. The measurement conditions are that the applied voltage is 250V and the application time is 10 seconds.

＜ESD Test＞ The ESD test was performed on the polarizing film with the adhesive layer in the following method. First, the polarizing film with the adhesive layer is attached to the liquid crystal cell through the adhesive layer to fabricate a liquid crystal panel. Then, the silver paste was coated with a width of 5 mm to cover each side of the polarizing film, conductive layer and adhesive layer of the liquid crystal panel. The conductive structure made of silver is formed by drying the silver paste. Through the conduction structure, the liquid crystal panel is electrically connected to the external ground electrode. Next, the liquid crystal panel is installed on the backlight device. Next, using an electrostatic discharge gun whose applied voltage has been adjusted to 15kV, static electricity is applied to the viewing side (polarizing film side) of the liquid crystal panel. This makes a part of the liquid crystal panel white. The time T from the application of static electricity to the disappearance of the white part is measured. In Table 1, the results of the ESD test are evaluated according to the relevant benchmarks at the following time T. In addition, the ESD test was conducted under the conditions of 23°C and 55% RH. (Assessment criteria) A: Less than 0.5 seconds B: More than 0.5 seconds and less than 1 second C: More than 1 second and less than 10 seconds D: more than 10 seconds

＜Anchor Casting Force＞ For the polarizing film with the adhesive layer, the anchoring force of the conductive layer and the polarizing film was measured by the above method. The double-sided tape uses the product name "No. 531" manufactured by Nitto Denko Corporation. The stainless steel test material uses a SUS304 plate (width 40mm×length 120mm). The evaluation sheet used ITO film (125 TETOLIGHT OES, manufactured by Oike Kogyo). The tensile tester used Autograph SHIMAZU AG-I 10KN (manufactured by Shimadzu Corporation).

[Table 1]

In the polarizing films with adhesive layers of Examples 1 to 12, the total light transmittance loss A caused by the conductive layer is 0.9% or less, so it can be inferred that the deterioration of the visibility of the liquid crystal display device can be sufficiently suppressed. In addition, the adhesive layer-attached polarizing films of Examples 1 to 12 having a conductive layer with a surface resistivity of 1.0×10 ⁶ Ω/□ or less have good ESD test results, so it can be inferred that the charging of the liquid crystal panel can be sufficiently suppressed. It can be read from Table 1 and Figure 8 that the total light transmittance loss A and the surface resistivity of the conductive layer are affected by the composition and thickness of the conductive layer.

<About Examples and Comparative Examples of Polarizing Film with Adhesive Layer of Anti-Reflection Film> [Adhesive layer A] First, a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler was charged with 76.9 parts of butyl acrylate, 18 parts of benzyl acrylate, 5 parts of acrylic acid, and 0.1 part of 4-hydroxybutyl acrylate to prepare The monomer mixture is obtained. Then, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was fed with 100 parts of ethyl acetate with respect to 100 parts of the monomer mixture (solid content). While slowly stirring the mixture, nitrogen gas was introduced into the flask to perform nitrogen substitution. By maintaining the liquid temperature in the flask at around 55°C for 8 hours, the polymerization reaction was carried out to prepare an acrylic polymer solution with a weight average molecular weight (Mw) of 2 million and Mw/Mn=4.1.

Next, with respect to 100 parts of the solid content of the acrylic polymer solution, 0.45 parts of isocyanate crosslinking agent (Coronate L manufactured by Tosoh Corporation, trimethylolpropane toluene diisocyanate) and 0.1 part are further blended Peroxide crosslinking agent (NYPER BMT manufactured by Nippon Oil & Fat Co., Ltd.) and 0.2 parts of silane coupling agent (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd., γ-glycidoxypropyl methoxysilane), by This prepares a solution of the acrylic adhesive composition.

Next, the obtained solution was applied to one side of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.). The separation part is a polyethylene terephthalate film treated with a silicone release agent. The obtained coating film was dried at 155° C. for 1 minute, thereby forming an adhesive layer A on the surface of the separator. The thickness of the adhesive layer A is 20 µm.

[Adhesive layer B] With respect to 100 parts of the solid content of the acrylic polymer solution, 1 part of lithium bis(trifluoromethanesulfonyl) imide (LiTFSI, manufactured by Mitsubishi Materials Co.) was further blended to prepare an acrylic adhesive The solution of the composition, except that the adhesive layer B is prepared in the same way as the adhesive layer A.

[Adhesive layer C] First, 94.9 parts of butyl acrylate, 5 parts of acrylic acid, and 0.1 part of 4-hydroxybutyl acrylate were charged into a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler, thereby obtaining a monomer mixture. Then, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was fed with 100 parts of ethyl acetate with respect to 100 parts of the monomer mixture (solid content). While slowly stirring the mixture, nitrogen gas was introduced into the flask to perform nitrogen substitution. By maintaining the liquid temperature in the flask at around 55°C for 8 hours, the polymerization reaction was carried out to prepare an acrylic polymer solution with a weight average molecular weight (Mw) of 2.1 million and Mw/Mn=4.0.

Next, with respect to 100 parts of the solid content of the acrylic polymer solution, 0.45 parts of isocyanate crosslinking agent (Coronate L manufactured by Tosoh Corporation, trimethylolpropane toluene diisocyanate) and 0.1 part are further blended Peroxide crosslinking agent (NYPER BMT manufactured by Nippon Oil & Fat Co., Ltd.) and 0.2 parts of silane coupling agent (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd., γ-glycidoxypropyl methoxysilane), by This prepares a solution of the acrylic adhesive composition.

Next, the obtained solution was applied to one side of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.). The separation part is a polyethylene terephthalate film treated with a silicone release agent. The obtained coating film was dried at 155° C. for 1 minute, thereby forming an adhesive layer C on the surface of the separator. The thickness of the adhesive layer C is 12 µm.

[Anti-reflective film AR1] First, prepare 50 parts by weight of an ultraviolet curable urethane acrylate resin (manufactured by Mitsubishi Chemical Co., trade name "UV1700TL", solid content concentration 80% by weight), and a resin containing neopentylerythritol triacrylate as the main component. 50 parts by weight of polyfunctional acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name "Viscoat #300", solid content concentration 100% by weight) as a resin for forming an anti-glare layer. The solid content of these resins is mixed with particles containing a copolymer of (meth)acrylate and styrene (manufactured by Sekisui Chemical Co., Ltd., trade name "Techpolymer SSX504TNR",” weight average particle size: 3.0 µm) 4 parts by weight; organic clay as a thixotropy imparting agent, namely synthetic bentonite (manufactured by KUNIMINE INDUSTRIES CO., LTD., trade name "SUMECTON SAN") 1.5 parts by weight; photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907") 3 parts by weight; leveling agent (manufactured by DIC Co., Ltd., trade name "GRANDIC PC4100", solid content concentration 10% by weight) 0.015 parts by weight. This mixture was diluted with a toluene/cyclopentanone mixed solvent (weight ratio 80/20) so that the solid content concentration became 50% by weight, and a material (coating liquid) for forming an anti-glare layer was prepared.

Next, a triacetyl cellulose (TAC) film (manufactured by Fuji Film Co., Ltd., trade name "TD60UL") was prepared. A bar coater is used to coat the material (coating liquid) for forming the anti-glare layer on one side of the transparent plastic film (TAC film) to form a coating film. Then, the coating film was dried by heating the transparent plastic film formed with the coating film at 80°C for 1 minute. Next, the coating film was irradiated with ultraviolet light with a cumulative light quantity of 300 mJ/cm ² using a high-pressure mercury lamp, thereby performing a curing treatment. By this, an anti-glare layer with a thickness of 8.0 µm can be formed, and a TAC film with an anti-glare layer can be produced. The haze of TAC film with anti-glare layer is 8%.

Next, the TAC film with the anti-glare layer is introduced into the roll-to-roll sputtering film forming device and the film is advanced, thereby bombarding the surface of the anti-glare layer (plasma treatment using Ar gas). _{Next, a SiO x} layer (x<2) with a physical film thickness of 3 nm was formed on the surface of the anti-glare layer as an adhesion layer. Next, on the adhesion layer, a Nb ₂ O ₅ layer (the first high refractive index layer) with a physical film _{thickness of 12 nm, a SiO 2} layer (the first low refractive index layer) with a physical film thickness of 29 nm, and a physical film thickness A 116 nm Nb ₂ O _{5 layer (second high refractive index layer) and a SiO 2} layer (second low refractive index layer) with a physical film thickness of 78 nm were sequentially formed to form a laminate a. When forming these oxide films, adjust the amount of argon introduced and exhaust to keep the pressure in the device constant, and at the same time adjust the amount of oxygen introduced by plasma emission monitoring (PEM) control.

Next, a layer (physical film thickness: 9 nm) made of a fluorine-based resin as an antifouling layer was formed on the surface of the second low refractive index layer (SiO _{2 layer) of the laminate a.} Then, the adhesive layer C is transferred to the surface of the TAC film of the laminate a, thereby producing the anti-reflection film AR1.

[Anti-reflective film AR2~AR10] The physical film thickness of each layer was changed to the value shown in Table 2, except that the anti-reflection films AR2 to AR10 were produced in the same way as the anti-reflection film AR1.

[Table 2]

[Polarizing Film P1] First, an acrylic film was made using the following method. In a 30L tank reactor equipped with a stirring device, a temperature sensor, a cooling tube, and a nitrogen introduction tube, 8,000 g of methyl methacrylate (MMA) and 2,000 g of 2-(hydroxymethyl) are fed Methyl acrylate (MHMA), 10,000g of 4-methyl-2-pentanone (methyl isobutyl ketone, MIBK), 5g of n-dodecanethiol. While introducing nitrogen into the reactor, the mixture in the reactor was heated to 105°C and refluxed. Next, 5.0 g of tertiary butylperoxy isopropyl carbonate (Kayakarubon BIC-7, manufactured by KAYAKU AKZO CO., LTD.) was added as a polymerization initiator, and it took 4 hours to drop the tertiary butyl peroxyisopropyl carbonate (Kayakarubon BIC-7, manufactured by KAYAKU AKZO CO., LTD.). A solution composed of butylperoxyisopropyl carbonate and 230 g of MIBK was subjected to solution polymerization. Solution polymerization is carried out at about 105~120°C under reflux. After all the drops are dropped, it takes another 4 hours to mature.

Then, 30g of octadecyl phosphate/di(octadecyl) phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Industry) was added to the prepared polymer solution and heated at about 90~120°C under reflux. The cyclization condensation reaction was carried out for 5 hours. Next, the prepared solution was introduced into a vent-type twin-screw extruder (φ=29.75mm, L/D=30) at a processing speed of 2.0 kg/h in terms of the amount of resin, and its sleeve temperature was 260°C , The number of rotations is 100rpm, the decompression degree is 13.3~400hPa (10~300mmHg), the number of rear vent holes is 1, and the number of front vent holes is 4. In the extruder, a further cyclization condensation reaction is carried out and devolatization is carried out at the same time. In this way, transparent pellets of a polymer containing lactone rings are prepared.

After the dynamic TG measurement of the prepared lactone ring-containing polymer, a mass loss of 0.17% by mass was detected. In addition, the weight average molecular weight of the lactone ring-containing polymer was 133,000, the melt flow rate was 6.5 g/10 minutes, and the glass transition temperature was 131°C.

Using a uniaxial extruder (screw 30mmφ), the obtained pellets and acrylonitrile-styrene (AS) resin (TOYO AS AS20, manufactured by TOYO STYRENE CO., LTD.) were kneaded and extruded at a mass ratio of 90/10. This obtains transparent pellets. The glass transition temperature of the obtained pellets was 127°C.

The pellets were melt-extruded from a 400mm wide hanger-type T-die using a 50mmφ uniaxial extruder to produce a film with a thickness of 120µm. Using a 2-axis stretching device, the film was stretched to 2.0 times in the longitudinal direction and 2.0 times in the transverse direction at a temperature of 150°C to obtain a stretched film (acrylic film) with a thickness of 30 µm. After measuring the optical properties of the stretched film, the total light transmittance was 93%, the in-plane retardation Δnd was 0.8 nm, and the thickness direction retardation Rth was 1.5 nm.

Next, the polarizing film P1 was produced by the following method. First, between a plurality of rollers with different speed ratios, a polyvinyl alcohol film with a thickness of 45 µm is dyed in a 0.3% iodine solution (temperature 30°C) for 1 minute and stretched at the same time to increase the stretching ratio to 3 times. Next, the obtained stretched film was immersed in an aqueous solution (temperature 60° C.) with a boric acid concentration of 4% and a potassium iodide concentration of 10% for 0.5 minutes and stretched simultaneously so that the total stretch magnification reached 6 times. Next, the stretched film was immersed in a 1.5% potassium iodide-containing aqueous solution (temperature 30°C) for 10 seconds to wash it. Next, the stretched film was dried at 50°C for 4 minutes, thereby producing a polarizing member with a thickness of 18 µm. A TAC film (manufactured by Konica Minolta, trade name "KC4UY") with a thickness of 40 µm was bonded to one main surface of the prepared polarizer through a polyvinyl alcohol-based adhesive. The above-mentioned acrylic film with a thickness of 30 µm is pasted on the other main surface of the polarizer through a polyvinyl alcohol-based adhesive. Thus, the polarizing film P1 is obtained.

(Example 13) First, 50 parts of a solution containing PEDOT/PSS (Denatron PT-436 manufactured by Nagase ChemteX Co.) and 50 parts of water were mixed to prepare a coating liquid with a solid content concentration of 0.5% by weight. Next, the coating liquid was applied to the surface of the acrylic film side of the polarizing film P1. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. Thus, a polarizing film with a conductive layer is obtained. The thickness of the conductive layer is 30 nm.

Next, the adhesive layer C of the anti-reflective film AR1 is attached to the surface of the TAC film of the polarizing film P1. Then, by transferring the adhesive layer A to the surface of the conductive layer, the polarizing film with the adhesive layer of Example 13 with the structure of anti-reflection film AR1/polarizing film P1/conductive layer/adhesive layer A was produced.

(Example 14) The coating solution of PEDOT/PSS was applied to the polarizing film P1 so that the thickness of the conductive layer became 90 nm, except that the adhesive layer-attached polarizing film of Example 14 was produced in the same manner as in Example 13.

(Examples 15-24, 26 and Comparative Example 5) The anti-reflective film, the conductive layer and the adhesive layer were changed to the combination shown in Table 3, except that the adhesive layer of Examples 15-24, 26 and Comparative Example 5 was prepared according to the same method as in Example 13. Polarizing film. In addition, in Comparative Example 5, the adhesive layer A was directly bonded to the surface of the acrylic film side of the polarizing film P1 without forming a conductive layer on the polarizing film P1.

(Example 25) First, 9 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase ChemteX Co.) and 91 parts of water were mixed to prepare a coating liquid with a solid content concentration of 0.27% by weight. Next, the coating liquid was applied to the surface of the acrylic film side of the polarizing film P1. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. Thus, a polarizing film with a conductive layer is obtained. The thickness of the conductive layer is 100 nm.

Next, the adhesive layer C of the anti-reflective film AR4 is attached to the surface of the TAC film of the polarizing film P1. Then, by transferring the adhesive layer A to the surface of the conductive layer, the polarizing film with the adhesive layer of Example 25 with the structure of anti-reflection film AR4/polarizing film P1/conductive layer/adhesive layer A was produced.

(Comparative Example 6) First, 8.6 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase ChemteX Co.) and a solution containing an oxazoline group-containing acrylic polymer (trade name: Epocros WS-700, manufactured by Nippon Shokubai) 1 Part and 90.4 parts of water were mixed to prepare a coating liquid (solid content concentration 0.5% by weight) for forming a conductive layer. In the obtained coating solution, the concentration of the polythiophene-based polymer was 0.04% by weight, and the concentration of the oxazoline group-containing acrylic polymer was 0.25% by weight.

Next, the obtained coating liquid was applied to the main surface on the acrylic film side of the polarizing film P1. The obtained coating film was dried at 80°C for 2 minutes to produce a conductive layer. Thus, a polarizing film with a conductive layer is obtained. The thickness of the conductive layer is 60 nm.

Next, the adhesive layer C of the anti-reflective film AR10 is attached to the surface of the TAC film of the polarizing film P1. Then, by transferring the adhesive layer A to the surface of the conductive layer, the polarizing film with the adhesive layer of Comparative Example 6 with the structure of anti-reflection film AR10/polarizing film P1/conductive layer/adhesive layer A was produced.

<Optical properties of polarizing film with adhesive layer> For the polarizing film with adhesive layer prepared in Examples 13 to 26 and Comparative Examples 5 to 6, the adhesive layer has been in direct contact with alkali-free glass. Under the state of non-alkali glass laminate, use the above evaluation method to evaluate the visual reflectance Y, L ^* value, a ^* value and b ^* value of the reflected light generated when the light from the CIE standard light source D65 enters the anti-reflection film. And the color difference ΔE between light and reflected light that satisfies L ^* value=0, a ^* value=0, and b ^*value=0. At this time, the polarizing film with the adhesive layer is cut into a 50mm square for use. The alkali-free glass used Corning EG-XG (thickness 0.7 mm). The black film is made of polyethylene terephthalate (PET). The spectral reflectance was measured using a spectrophotometer (manufactured by Konica Minolta, trade name "CM2600D"). The evaluation sample used to evaluate the optical properties has a structure of a polarizing film with an adhesive layer/alkali-free glass/black PET film. However, for the polarizing film with the adhesive layer of Example 26, an alkali-free glass with an amorphous ITO layer (thickness 20 nm) formed on the surface was used to evaluate the reflected light. That is, in Example 26, the evaluation sample has a structure of a polarizing film with an adhesive layer/ITO layer/alkali-free glass/black PET film. The ITO layer is made by sputtering. The Sn ratio of ITO contained in the ITO layer is 3% by weight. The Sn ratio is calculated from the weight of Sn atoms in ITO/(the weight of Sn atoms + the weight of In atoms).

<Optical properties of anti-reflective film> For anti-reflective films AR1~AR10, use the above method to evaluate: the visual reflectance Y ₁ , a ₁ ^* value and b of the reflected light generated by the light from the CIE standard light source D65 when it is incident ₁ ^* value. The black film, spectrophotometer, etc. are the same as those used when evaluating the optical properties of the polarizing film with the adhesive layer.

＜Surface resistivity of adhesive layer＞ The surface resistivity (Ω/□) of the adhesive layer A and B is measured at the stage where the adhesive layer A or B is formed on the surface of the separator. The surface resistivity was measured using a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech). The measurement conditions are that the applied voltage is 250V and the application time is 10 seconds.

＜Surface resistivity of conductive layer＞ In Examples 13 to 26 and Comparative Example 6, the surface resistivity (Ω/□) of the conductive layer was measured at the stage when the conductive layer was formed on the surface of the polarizing film P1. In Example 25 and Comparative Example 6, the surface resistivity of the conductive layer was measured using a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech) according to the method specified in JIS K6911: 1995. The measurement conditions are that the applied voltage is 10V and the application time is 10 seconds. In Examples 13-24 and 26, the measurement of the surface resistivity of the conductive layer was performed using a resistivity meter (Loresta-GP MCP-T600 manufactured by Mitsubishi Chemical Analytech), and was performed in accordance with the method specified in JIS K7194:1994. The measurement conditions are that the applied voltage is 10V and the application time is 10 seconds.

<Surface resistivity of polarizing film> In Comparative Example 5, a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech) was used to measure the surface resistivity of polarizing film P1 according to the method specified in JIS K6911: 1995 . The measurement conditions are that the applied voltage is 10V and the application time is 10 seconds. The surface resistivity of the polarizing film P1 is greater than 1.0×10 ¹⁴ Ω/□.

＜Loss of total light transmittance caused by conductive layer A＞ First, in accordance with JIS K7361-1: 1997, a spectrophotometer (V7100 manufactured by JASCO Corporation) was used to measure the total light transmittance T1 of the polarizing film P1. In the same way, the total light transmittance T2 of the laminate L composed of the polarizing film P1 and the conductive layer was measured at the stage where the conductive layer was formed on the surface of the polarizing film P1. The total light transmittance T2 of the layered body L is measured by making light enter from the side of the polarizing film P1. Calculate the difference (T1-T2) between the total light transmittance T1 of the polarizing film P1 and the total light transmittance T2 (T1-T2), and take the calculated value as the total light transmittance loss A caused by the conductive layer.

＜ESD Test＞ First, the polarizing films with the adhesive layer obtained in Examples 13 to 26 and Comparative Examples 5 to 6 were bonded to the viewing side surface of the liquid crystal cell to produce a liquid crystal panel. However, Example 26 uses a liquid crystal cell with an amorphous ITO layer (thickness 20 nm) formed on the surface. That is, in Example 26, the liquid crystal panel has a structure of a polarizing film with an adhesive layer/ITO layer/liquid crystal cell. The ITO layer is made by sputtering. The Sn ratio of ITO contained in the ITO layer is 3% by weight. Then, silver paste was coated with a width of 5 mm to cover the side of the polarizing film with the adhesive layer. The conductive structure made of silver is formed by drying the silver paste. Through the conduction structure, the liquid crystal panel is electrically connected to the external ground electrode. Next, the liquid crystal panel is installed on the backlight device. Next, using an electrostatic discharge (ESD) gun whose applied voltage has been adjusted to 10kV, static electricity is applied to the viewing side (anti-reflection film side) of the liquid crystal panel. This makes a part of the liquid crystal panel white. The time T from the application of static electricity to the disappearance of the white part is measured. In Table 3, the results of the ESD test are evaluated according to the relevant benchmarks of the following time T. In addition, the ESD test was conducted under the conditions of 23°C and 55% RH. (Assessment criteria) A: Less than 0.5 seconds B: More than 0.5 seconds and less than 1 second C: More than 1 second and less than 10 seconds D: more than 10 seconds

<Color tone> The liquid crystal panel produced in the above-mentioned ESD test was visually observed from the visual side (anti-reflection film side), and the color tone was evaluated. In the hue items in Table 3, A means that the hue is not confirmed. B means that a very slight tone can be confirmed. C means that a slight tone can be confirmed. D means that the tint can be confirmed.

[table 3]

It can be seen from Table 3 that in the polarizing films with adhesive layers of Examples 13 to 26, the total light transmittance loss A caused by the conductive layer is 0.9% or less, so it can be inferred that the visibility of the liquid crystal display device can be sufficiently suppressed. The deterioration of sex. In addition, the adhesive layer-attached polarizing films of Examples 13 to 26 having a conductive layer with a surface resistivity of 1.0×10 ⁶ Ω/□ or less have good ESD test results, so it can be inferred that the charging of the liquid crystal panel can be sufficiently suppressed. From the ESD test results of Example 15 and Example 26, it can be seen that by using a conductive layer and an adhesive layer added with a conductive material at the same time, charging of the liquid crystal panel can be sufficiently suppressed compared to the case of using an ITO layer. In addition, it can be seen from the results of Examples 24 and 26 that when the ITO layer is not arranged between the polarizing film with the adhesive layer and the liquid crystal cell, the visual reflectance Y value of the reflected light is low, and the light reflection is sufficiently suppressed.

In addition, compared with the liquid crystal panel with the polarizing film with the adhesive layer of Example 24, Comparative Examples 5 and 6, the liquid crystal panel with the polarizing film with the adhesive layer of Examples 13 to 23 and Examples 25 to 26 (It produces ^{reflected light whose a*} value and b ^* value satisfy the relational expressions (1) and (2)), and the color tone is not confirmed, or even if the color tone is confirmed, there is no practical problem. That is, the reflected light from the liquid crystal panel provided with the polarizing film with the adhesive layer of Examples 13 to 23 and Examples 25 to 26 has a neutral hue. Industrial availability

The polarizing film with an adhesive layer of the present invention can be suitably used in liquid crystal display devices used in environments prone to static electricity, especially in environments where there are other electronic devices around the interior of a vehicle.

1: Polarizing film 2: conductive layer 3: Adhesive layer 5: Liquid crystal layer 6: The first transparent substrate 7: The second transparent substrate 10,11,12: Polarizing film with adhesive layer 20: LCD unit 30: Touch panel 40, 47: Anti-reflective film 41: The first high refractive index layer 42: The first low refractive index layer 43: The second high refractive index layer 44: The second low refractive index layer 45: Substrate 46: Adhesive layer 50: Transparent substrate 55: Adhesive layer 100, 110: LCD panel

Fig. 1 is a cross-sectional view of a polarizing film with an adhesive layer according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a modified example of a polarizing film with an adhesive layer. Fig. 3 is a cross-sectional view showing an example of an anti-reflection film. Fig. 4 is a cross-sectional view showing another example of the anti-reflection film. Fig. 5 is a cross-sectional view showing another modification of the polarizing film with an adhesive layer. Fig. 6 is a cross-sectional view of a liquid crystal panel provided with a polarizing film with an adhesive layer of the present invention. Fig. 7 is a cross-sectional view of a liquid crystal panel according to another embodiment of the present invention. FIG. 8 is a graph showing the relationship between the surface resistivity of the conductive layer and the loss of total light transmittance caused by the conductive layer for the polarizing films with the adhesive layer of Examples 1-12 and Comparative Examples 1, 2 and 4. 9 is a graph showing the relationship between ^{the a*} value and the b ^* value of the reflected light from the polarizing film with the adhesive layer of Examples 13 to 26 and Comparative Examples 5 and 6.

1: Polarizing film

2: conductive layer

3: Adhesive layer

10: Polarizing film with adhesive layer

Claims (15)

A polarizing film with an adhesive layer, comprising a polarizing film and an adhesive layer; the polarizing film with the adhesive layer is further equipped with a conductive layer, the total light transmittance loss caused by the conductive layer is 0.9% or less, and the conductive layer The surface resistivity of the layer is 1.0×10 ⁶ Ω/□ or less. For example, the polarizing film with an adhesive layer of claim 1, wherein the polarizing film, the conductive layer, and the adhesive layer are sequentially laminated. Such as claim 1 or 2 of the polarizing film with adhesive layer, wherein the aforementioned loss is 0.5% or less. The polarizing film with an adhesive layer according to any one of claims 1 to 3, wherein the aforementioned loss is 0.4% or less. The polarizing film with an adhesive layer according to any one of claims 1 to 4, wherein the surface resistivity is 5.0×10 ⁵ Ω/□ or less. The polarizing film with an adhesive layer according to any one of claims 1 to 5, wherein the surface resistivity is 1.0×10 ⁴ Ω/□ or less. The polarizing film with an adhesive layer according to any one of claims 1 to 6, wherein the aforementioned surface resistivity is greater than 5.0×10 ² Ω/□. For example, the polarizing film with adhesive layer of claim 1 or 2, in which at least one of the following is true: (i) the aforementioned loss is 0.5% or less and the aforementioned surface resistivity is 1.0×10 ⁶ Ω/□ or less; and (ii) The aforementioned loss is 0.9% or less, and the aforementioned surface resistivity is 1.0×10 ⁴ Ω/□ or less. The polarizing film with an adhesive layer according to any one of claims 1 to 8, wherein the adhesive layer includes a conductive material. Such as the polarizing film with adhesive layer of any one of claims 1 to 9, which is further provided with an anti-reflection film; and The anti-reflection film, the polarizing film, and the adhesive layer are sequentially arranged in the stacking direction. For example, the polarizing film with the adhesive layer of claim 10, in the state where the adhesive layer has been laminated with the alkali-free glass in direct contact with the alkali-free glass, when the light from the CIE standard light source D65 is caused by the aforementioned adhesive When the surface on the opposite side of the layer is incident, reflected light with a visual reflectance Y of 1.1% or less is generated. For example, the polarizing film with adhesive layer of claim 11, wherein ^{the a*} value and b ^{* value in the L*} a ^* b ^* color system of the aforementioned reflected light satisfy the following relational expressions (1) and (2):- 10≦a ^* ≦10...(1) -18≦b ^* ≦5...(2). The polarizing film with an adhesive layer according to any one of claims 10 to 12, wherein the anti-reflection film has a first high refractive index layer, a first low refractive index layer, and a second high refractive index layer in order in the stacking direction Layer and the second low refractive index layer. For example, the polarizing film with adhesive layer of claim 13, wherein the optical film thickness of the first high refractive index layer is 20nm~35nm, The optical film thickness of the aforementioned first low refractive index layer is 38nm~50nm, The optical film thickness of the aforementioned second high refractive index layer is 230nm~290nm, The optical film thickness of the aforementioned second low refractive index layer is 100 nm to 128 nm. A liquid crystal panel, comprising a polarizing film with an adhesive layer as claimed in any one of claims 1 to 14, and a liquid crystal cell, and There is no conductive layer between the polarizing film with the adhesive layer and the liquid crystal cell.

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