WO2021206073A1 - Film polarisant - Google Patents

Film polarisant Download PDF

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Publication number
WO2021206073A1
WO2021206073A1 PCT/JP2021/014574 JP2021014574W WO2021206073A1 WO 2021206073 A1 WO2021206073 A1 WO 2021206073A1 JP 2021014574 W JP2021014574 W JP 2021014574W WO 2021206073 A1 WO2021206073 A1 WO 2021206073A1
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WO
WIPO (PCT)
Prior art keywords
polarizing film
film
polarizing
weight
iodine
Prior art date
Application number
PCT/JP2021/014574
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English (en)
Japanese (ja)
Inventor
浩明 澤田
山下　智弘
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN202180027116.2A priority Critical patent/CN115398289A/zh
Priority to KR1020227022599A priority patent/KR20220164466A/ko
Publication of WO2021206073A1 publication Critical patent/WO2021206073A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a polarizing film.
  • a polarizing film used in various image display devices such as a liquid crystal display device and an organic EL display device
  • dyed such as iodine and dichroic dyes
  • a polyvinyl alcohol-based film (containing a dichroic substance) is used.
  • the polarizing film is produced by subjecting a polyvinyl alcohol-based film to various treatments such as swelling, dyeing, cross-linking, and stretching in a bath, washing treatment, and then drying.
  • the polarizing film is usually used as a polarizing film (polarizing plate) in which a protective film such as triacetyl cellulose is bonded to one side or both sides thereof using an adhesive.
  • Patent Document 1 a polarizing film having a high iodine content is required. Further, it is known that even such a thin polarizing film can suppress the amount of change in the simple substance transmittance in a high temperature environment (105 ° C. ⁇ 30 hours) (Patent Document 2).
  • the thin polarizing films specifically disclosed in Patent Documents 1 and 2 do not sufficiently suppress the decrease in the single transmittance in a high temperature environment, and there is room for improvement in the performance.
  • the present inventors have found that iodine contained in an iodine-based polarizing film promotes polyene formation in a high temperature environment. Therefore, it is effective to reduce the iodine content in the polarizing film in order to suppress the decrease in the simple substance transmittance due to the coloring of the polarizing film in a high temperature environment. On the other hand, it has been difficult to obtain a polarizing film having a good degree of polarization and a high content of iodine.
  • a polarizing film having a high iodine content in a polarizing film having a high iodine content, a polarizing film having a simple substance transmittance of 41% or less can be used from the viewpoint that the contrast can be increased by setting the simple substance transmittance low. It has been demanded.
  • the polarizing film has a problem that the degree of polarization is lowered due to the boric acid cross-linking in the polarizing film being removed and the iodine complex being broken in a high temperature and high humidity environment.
  • the present invention has an initial simple substance transmittance of 41% or less in a polarizing film having a high iodine content, and a decrease in the simple substance transmittance due to coloring of the polarizing film in a high temperature environment. It is an object of the present invention to provide a polarizing film having an excellent suppressing effect and further having an excellent suppressing effect (humidification durability) of a decrease in the degree of polarization in a high temperature and high humidity environment.
  • Ts 96 represents a single-unit permeability after the laminated body is heat-treated at 105 ° C. for 96 hours.
  • the present invention relates to a polarizing film satisfying the condition that the amount of change ( ⁇ Ts) of the single-unit transmittance represented by is 0% or more and 5% or less.
  • the polarizing film of the present invention is a polarizing film in which a transparent protective film or an optical functional film is bonded to at least one surface of the polarizing film, and the polarizing film is formed by adsorbing and orienting iodine on a polyvinyl alcohol-based film.
  • the transparent protective film or the optical functional film is a first film moisture permeability is 200g / (m 2 ⁇ 24h) or less, it said polarizing film,
  • the single-unit transmittance is 41% or less
  • the general formula (1): ⁇ Ts (%) Ts 96 -Ts 0 (in the general formula (1), Ts 0 is the first film surface of the polarizing film. It is the single-unit permeability of a laminated body in which a glass plate is bonded to the opposite surface via an adhesive layer, and Ts 96 represents the single-unit permeability after the laminated body is heat-treated at 105 ° C. for 96 hours.
  • the polarizing film of the present invention has a small amount of change ( ⁇ Ts) in the simple substance transmittance after the above heat treatment (under a high temperature environment), it is possible to suppress a decrease in the simple substance transmittance due to coloring of the polarizing film.
  • the reason why the amount of change in the simple substance transmittance ( ⁇ Ts) before and after the heat treatment is small is that the temperature at which the dehydration reaction due to polyeneization occurs in the polarizing film of the present invention is higher than that of the conventional polarizing film. Presumed.
  • the above heat treatment is a heat durability test that is used as an index of heat resistance of a display, and is more severe than the heat durability tests of Patent Documents 1 and 2 described above.
  • the polarizing film of the present invention by setting the iodine concentration in the polarizing film within a certain range, the temperature at which the dehydration reaction due to polyene formation occurs can be controlled to a high temperature side, but the initial degree of polarization is improved. ..
  • the polarizing film of the present invention because moisture permeability is 200g / (m 2 ⁇ 24h) or less, by preventing the intrusion of water into the polarizing film, high temperature and high Even in a humid environment, it has an excellent effect of suppressing a decrease in the degree of polarization (humidity durability).
  • the polarizing film of the present invention is an iodine-based polarizing film formed by adsorbing and orienting iodine on a polyvinyl alcohol-based film, and the iodine content is more than 10% by weight.
  • the polarizing film has an iodine content of more than 10% by weight from the viewpoint of improving the initial degree of polarization of the polarizing film.
  • the iodine content is preferably 12% by weight or more, more preferably 15% by weight or more, and From the viewpoint of raising the temperature at which the dehydration reaction due to polyeneization occurs, the iodine content is preferably 30% by weight or less, and more preferably 25% by weight or less.
  • the polarizing film preferably has a thickness of 0.2 ⁇ m or more, more preferably 0.5 ⁇ m or more, and makes the polarizing film thinner. From the above viewpoint, the thickness is preferably 10 ⁇ m or less, more preferably 8 ⁇ m or less, and further preferably 5 ⁇ m or less.
  • the polarizing film preferably contains a radical scavenger. It is presumed that the radical scavenger can set the temperature at which the dehydration reaction of polyene formation occurs on the high temperature side by capturing the radicals generated by heating the polyvinyl alcohol of the polarizing film.
  • the radical scavenger include radical scavengers such as hindered phenol-based, hindered amine-based, phosphorus-based, sulfur-based, benzotriazole-based, benzophenone-based, hydroxylamine-based, salicylate ester-based, and triazine-based compounds. Be done.
  • the radical scavenger is preferably, for example, a nitroxy radical or a compound having a nitroxide group from the viewpoint that the temperature at which the dehydration reaction of polyene formation occurs can be easily set on the high temperature side.
  • N-oxyl compound functional group, the C-N (-C) -O ⁇ compounds having (O ⁇ is an oxy radical)
  • known materials can be used.
  • N-oxyl compound include compounds having an organic group having the following structure.
  • R 1 represents an oxy radical
  • R 2 to R 5 independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
  • n is 0 or 1.
  • the left side of the dotted line part shows an arbitrary organic group.
  • Examples of the compound having an organic group include compounds represented by the following general formulas (2) to (5).
  • R 1 to R 5 and n are the same as above, and R 6 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, an acyl group, or an aryl group. , N represents 0 or 1.
  • R 1 to R 5 and n are the same as above, and R 7 and R 8 are independently hydrogen atoms or alkyl groups having 1 to 10 carbon atoms.
  • R 1 to R 5 and n are the same as described above, and R 9 to R 11 are independently hydrogen atoms or alkyl groups having 1 to 10 carbon atoms.
  • R 12 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, an amino group, an alkoxy group and a hydroxy group. Represents a group or an aryl group.
  • R 2 to R 5 are preferably alkyl groups having 1 to 6 carbon atoms and having 1 to 3 carbon atoms from the viewpoint of availability. It is more preferably an alkyl group.
  • R 6 is preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and more preferably a hydrogen atom.
  • R 7 and R 8 are preferably hydrogen atoms independently or alkyl groups having 1 to 10 carbon atoms, and are hydrogen atoms. Is more preferable.
  • R 9 to R 11 are preferably hydrogen atoms or alkyl groups having 1 to 10 carbon atoms.
  • R 12 is preferably a hydroxy group, an amino group, or an alkoxy group.
  • n is preferably 1 from the viewpoint of availability.
  • N-oxyl compound examples include N- described in JP-A-2003-64022, JP-A-11-222462, JP-A-2002-284737, and International Publication No. 2016/047655. Oxyl compounds can be mentioned.
  • the radical scavenger preferably has a molecular weight of 1000 or less, more preferably 500 or less, and further preferably 300 or less, from the viewpoint of efficiently capturing radicals generated in the polyene reaction. preferable.
  • the radical trapping agent is short from the viewpoint of being able to efficiently soak into the polarizing film together with water during the production of the polarizing film, from the viewpoint of being able to impregnate the polarizing film at a high concentration, and even when a thick polyvinyl alcohol-based film is used. Since it can be impregnated with time, it is preferable that 1 part by weight or more can be dissolved in 100 parts by weight of water at 25 ° C., and 2 parts by weight with respect to 100 parts by weight of water at 25 ° C. from the viewpoint of increasing the productivity of the polarizing film. It is more preferable that it can be dissolved as described above, and it is further preferable that it can be dissolved in 5 parts by weight or more with respect to 100 parts by weight of water at 25 ° C.
  • examples of the compound having a nitroxyl radical or a nitroxide group include the following compounds.
  • R represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, an acyl group, or an aryl group.
  • the content of the radical scavenger is 0.1% by weight in the polarizing film from the viewpoint of suppressing a decrease in single transmittance due to coloring of the polarizing film in a high temperature environment. % Or more, more preferably 0.2% by weight or more, further preferably 0.5% by weight or more, and preferably 30% by weight or less from the viewpoint of appearance. , 20% by weight or less, more preferably 10% by weight or less.
  • the polarizing film When the polarizing film contains the radical scavenger, the polarizing film has a weight ratio of the content of the radical scavenger to the content of the iodine (the content of the radical scavenger / the weight of the iodine content).
  • the ratio is preferably 0.01 or more, more preferably 0.05 or more, and from the viewpoint of appearance, from the viewpoint of suppressing a decrease in the radical transmittance due to coloring of the polarizing film in a high temperature environment. Therefore, it is preferably 1.0 or less, and more preferably 0.5 or less.
  • the method for producing a polarizing film is obtained by subjecting a polyvinyl alcohol-based film (PVA-based film) to an arbitrary swelling step, a washing step, and a drying step, and at least a dyeing step, a cross-linking step, and a stretching step.
  • the content of the iodine contained in the polarizing film is the content of the iodine and iodide such as potassium iodide contained in any of the treatment baths in the swelling step, the dyeing step, the cross-linking step, the stretching step and the washing step. It can be controlled by the concentration, the treatment temperature and the treatment time of each of the above treatment baths. Further, each step may be performed in an arbitrary appropriate order, and one step may be performed a plurality of times as needed.
  • the polyvinyl alcohol-based film has translucency in the visible light region, and can be used without particular limitation if it disperses and adsorbs a dichroic substance such as iodine or a dichroic dye.
  • a dichroic substance such as iodine or a dichroic dye.
  • the material of the polyvinyl alcohol-based film include polyvinyl alcohol or a derivative thereof.
  • the polyvinyl alcohol derivative include polyvinyl formal, polyvinyl acetal; olefins such as ethylene and propylene; unsaturated carboxylic acids such as acrylic acid, methacrylic acid and crotonic acid, and alkyl esters and acrylamides thereof. Can be mentioned.
  • the polyvinyl alcohol preferably has an average degree of polymerization of about 100 to 10,000, more preferably about 1,000 to 10,000, and even more preferably about 1,500 to 4,500. ..
  • the polyvinyl alcohol preferably has a degree of saponification of about 80 to 100 mol%, more preferably about 95 mol% to 99.95 mol.
  • the average degree of polymerization and the degree of saponification can be determined according to JIS K 6726.
  • the polyvinyl alcohol-based film may contain additives such as a plasticizer and a surfactant.
  • the plasticizer include polyols such as glycerin, diglycerin, triglycerin, ethylene glycol, propylene glycol, and polyethylene glycol, and condensates thereof.
  • the amount of the additive used is not particularly limited, but is preferably about 20% by weight or less in the polyvinyl alcohol-based film, for example.
  • the polyvinyl alcohol-based film uses a laminate in which a polyvinyl alcohol-based resin layer (PVA-based resin layer) containing a polyvinyl alcohol-based resin (PVA-based resin) is formed on one side of a long thermoplastic resin base material. May be good. Any suitable method is adopted as the method for producing the laminate. For example, a method of applying a coating liquid containing the PVA-based resin to the surface of the thermoplastic resin base material and drying the laminate can be mentioned. Be done.
  • the thickness of the thermoplastic resin base material is preferably about 20 to 300 ⁇ m, more preferably about 50 to 200 ⁇ m.
  • the thickness of the PVA-based resin layer is preferably about 3 to 40 ⁇ m, more preferably about 3 to 20 ⁇ m.
  • thermoplastic resin can be adopted as the constituent material of the thermoplastic resin base material.
  • the thermoplastic resin include ester resins such as polyethylene terephthalate resins, cycloolefin resins such as norbornene resins, olefin resins such as polypropylene, polyamide resins, polycarbonate resins, and copolymer resins thereof. And so on.
  • norbornene-based resin and amorphous (amorphous) polyethylene terephthalate-based resin are preferable, and further, the thermoplastic resin base material is extremely excellent in stretchability and crystallization during stretching can be suppressed.
  • Amorphous (amorphous) polyethylene terephthalate resin is preferably used.
  • amorphous (amorphous) polyethylene terephthalate resin examples include a copolymer containing isophthalic acid and / or cyclohexanedicarboxylic acid as a dicarboxylic acid, and a copolymer containing cyclohexanedimethanol or diethylene glycol as a glycol.
  • the thermoplastic resin base material may be surface-treated (for example, corona treatment or the like) before forming the PVA-based resin layer, or the easy-adhesion layer may be formed on the thermoplastic resin base material. .. By performing such a treatment, the adhesion between the thermoplastic resin base material and the PVA-based resin layer can be improved. Further, the thermoplastic resin base material may be stretched before forming the PVA-based resin layer.
  • the coating liquid is a solution in which a PVA-based resin is dissolved in a solvent.
  • the solvent include water, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, various glycols, polyhydric alcohols such as trimethylpropane, and amines such as ethylenediamine and diethylenetriamine. preferable. These can be used alone or in combination of two or more.
  • the concentration of the PVA-based resin in the coating liquid is about 3 to 20 parts by weight with respect to 100 parts by weight of the solvent from the viewpoint of being able to form a uniform coating film in close contact with the thermoplastic resin base material. preferable.
  • the coating liquid may contain a halide from the viewpoint of improving the orientation of polyvinyl alcohol molecules by stretching.
  • a halide any suitable halide can be adopted, and examples thereof include iodide and sodium chloride.
  • the iodide include potassium iodide, sodium iodide, lithium iodide and the like, and potassium iodide is preferable.
  • the concentration of the halide in the coating liquid is preferably about 5 to 20 parts by weight, more preferably about 10 to 15 parts by weight, based on 100 parts by weight of the PVA-based resin.
  • an additive may be added to the coating liquid.
  • the additive include plasticizers such as ethylene glycol and glycerin; and surfactants such as nonionic surfactants.
  • any suitable method can be adopted as the coating method of the coating liquid, and for example, a roll coating method, a spin coating method, a wire bar coating method, a dip coating method, a die coating method, a curtain coating method, and a spray coating method can be adopted. , Knife coat method (comma coat method, etc.) and the like.
  • the PVA-based film is typically uniaxially stretched about 3 to 7 times.
  • the stretching direction may be the longitudinal direction of the film (MD direction) or the width direction of the film (TD direction).
  • the stretching direction is preferably the TD direction from the viewpoint of laminating the transparent protective film or the optical functional film with the roll-to-roll.
  • the stretching method may be dry stretching, wet stretching, or a combination of these.
  • the PVA-based film may be stretched when performing a crosslinking step, a swelling step, a dyeing step, or the like.
  • the stretching step may be performed in one step or in multiple steps. When performed in multiple stages, the draw ratio is the product of the draw ratios of each stage.
  • the stretching direction can correspond to the absorption axis direction of the obtained polarizing film.
  • the swelling step is performed before the dyeing step, if necessary.
  • the swelling step is performed, for example, by immersing a PVA-based film in a swelling bath.
  • a swelling bath water such as distilled water or pure water is usually used.
  • the swollen bath may contain any suitable other component other than water.
  • the other components include solvents such as alcohol, additives such as surfactants, and iodides.
  • the iodide include potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, and iodide.
  • titanium, and potassium iodide is preferable.
  • the temperature of the swelling bath is, for example, about 20 to 45 ° C.
  • the immersion time is, for example, about 10 to 300 seconds.
  • the dyeing step is a step of dyeing a PVA-based film with a dichroic substance.
  • the adsorption method include a method of immersing a PVA-based film in a dyeing solution containing a dichroic substance, a method of applying the dyeing solution to the PVA-based film, a method of spraying the dyeing solution onto the PVA-based film, and the like. From the viewpoint that the dichroic substance can be adsorbed well, the method of immersing the PVA-based film in the dyeing solution is preferable.
  • the dichroic substance examples include iodine and a dichroic dye, and iodine is preferable.
  • iodine is used as the dichroic substance
  • an aqueous iodine solution is preferably used as the staining solution.
  • the iodine content of the iodine aqueous solution is preferably about 0.04 to 5.0 parts by weight with respect to 100 parts by weight of water.
  • iodide is preferably used as the iodide.
  • the content of the iodide is preferably about 0.3 to 15 parts by weight with respect to 100 parts by weight of water.
  • the ratio of the content of iodine and iodide in the iodine aqueous solution is preferably about 1: 5 to 1:20, preferably about 1: 5 to 1:10. More preferably.
  • the temperature of the dyeing solution is, for example, 20 to 50 ° C.
  • the immersion time is, for example, 5 seconds to 5 minutes.
  • a boron compound is usually used as a cross-linking agent.
  • the boron compound include boric acid and borax, and boric acid is preferable.
  • the boron compound is usually used in the form of an aqueous solution.
  • the concentration of the boron compound is, for example, about 0.5 to 15% by weight, preferably about 1 to 10% by weight.
  • the aqueous solution containing the boron compound may contain iodide such as potassium iodide.
  • the cross-linking step includes, for example, a method of immersing a PVA-based film in an aqueous solution containing a boron compound, a method of applying an aqueous solution containing a boron compound to a PVA-based film, a method of spraying an aqueous solution containing a boron compound onto a PVA-based film, and the like.
  • the method of immersing in an aqueous solution containing a boron compound is preferable.
  • the temperature of the aqueous solution containing the boron compound is, for example, 25 ° C. or higher, preferably about 30 to 85 ° C., and even more preferably about 40 to 70 ° C.
  • the immersion time is, for example, about 5 to 800 seconds, preferably about 8 to 500 seconds.
  • the cleaning step is performed after the cross-linking step, if necessary.
  • the cleaning step is typically performed by immersing a PVA-based film in a cleaning solution. Pure water is a typical example of the cleaning liquid.
  • the cleaning solution may contain iodide such as potassium iodide.
  • the temperature of the cleaning liquid is, for example, about 5 to 50 ° C.
  • the immersion time is, for example, about 1 to 300 seconds.
  • the radical scavenging is performed in one or more of the swelling step, the washing step, the dyeing step, the cross-linking step, and the stretching step. It may contain an agent.
  • concentration of the radical scavenger contained in any of the treatment baths cannot be unconditionally determined because it is affected by the number of treatments, the treatment time, the treatment temperature, etc. of each treatment, but the concentration of the radical scavenger in the polarizing film is contained.
  • the amount is usually preferably 0.01% by weight or more, more preferably 0.05% by weight or more, further preferably 0.1% by weight or more, and , 30% by weight or less, more preferably 25% by weight or less, still more preferably 20% by weight or less.
  • each treatment bath in the swelling step, the dyeing step, the cross-linking step, the stretching step, and the washing step contains additives such as zinc salts, pH adjusters, pH buffers, and other salts.
  • the zinc salt include zinc halides such as zinc chloride and zinc iodide; and inorganic zinc salts such as zinc sulfate and zinc acetate.
  • the pH adjuster include strong acids such as hydrochloric acid, sulfuric acid and nitric acid, and strong bases such as sodium hydroxide and potassium hydroxide.
  • Examples of the pH buffer include carboxylic acids such as acetic acid, oxalic acid and citric acid and salts thereof, and inorganic weak acids such as phosphoric acid and carbonic acid and salts thereof.
  • Examples of the other salts include chlorides such as sodium chloride, potassium chloride and barium chloride, nitrates such as sodium nitrate and potassium nitrate, sulfates such as sodium sulfate and potassium sulfate, and alkali metals and alkaline earth metals. Examples include salt.
  • drying step examples include natural drying, blast drying, vacuum drying, heat drying and the like, and heat drying is preferable.
  • the heating temperature is, for example, 30 to 100 ° C.
  • the drying time is, for example, 20 seconds to 10 minutes.
  • the polarizing film of the present invention is a polarizing film in which a transparent protective film or an optical functional film is bonded to at least one surface of the polarizing film, and the transparent protective film or the optical functional film has a moisture permeability of 200 g / (.
  • Ts 0 is the single permeability of a laminated body in which a glass plate is bonded to the opposite surface of the first film surface of the polarizing film via an adhesive layer
  • Ts 96 is the laminated body. Represents the single-unit permeability after heat treatment at 105 ° C. for 96 hours.) The condition is that the amount of change ( ⁇ Ts) in the single-unit permeability is 0% or more and 5% or less.
  • the transparent protective film is not particularly limited, and various transparent protective films used for the polarizing film can be used.
  • a thermoplastic resin having excellent transparency, mechanical strength, thermal stability, moisture blocking property, isotropic property and the like is used.
  • the thermoplastic resin include cell roll ester resins such as triacetyl cellulol, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyether sulfone resins, polysulfone resins, polycarbonate resins, nylon and fragrances.
  • Polyamide-based resin such as group polyamide, polyimide-based resin, polyethylene, polypropylene, polyolefin-based resin such as ethylene / propylene copolymer, (meth) acrylic-based resin, cyclic polyolefin-based resin having a cyclo-based or norbornene structure (norbornene-based resin) ), Polyallylate-based resin, polystyrene-based resin, polyvinyl alcohol-based resin, and mixtures thereof.
  • a cured layer formed of a thermosetting resin such as (meth) acrylic, urethane, acrylic urethane, epoxy, silicone or the like or an ultraviolet curable resin can be used.
  • cell roll ester-based resins, polycarbonate-based resins, (meth) acrylic-based resins, cyclic polyolefin-based resins, and polyester-based resins are preferable.
  • the thickness of the transparent protective film can be appropriately determined, but in general, it is preferably about 1 to 500 ⁇ m, preferably about 1 to 300 ⁇ m, from the viewpoint of workability such as strength and handleability, and thin layer property. More preferably, it is more preferably about 5 to 100 ⁇ m.
  • the transparent protective film contains any suitable additives such as UV absorbers, antioxidants, lubricants, plasticizers, mold release agents, color inhibitors, flame retardants, antistatic agents, pigments, colorants and the like. You may. In particular, when the transparent protective film contains an ultraviolet absorber, the light resistance of the polarizing film can be improved.
  • the optical functional film is not particularly limited, and for example, a reflector, a semitransparent plate, a retardation plate (including a wave plate such as 1/2 or 1/4), a viewing angle compensation film, a linearly polarizing separation film, or the like.
  • a reflector a semitransparent plate
  • a retardation plate including a wave plate such as 1/2 or 1/4
  • a viewing angle compensation film a linearly polarizing separation film, or the like.
  • One layer or two or more layers of an optical functional film that may be used for forming a liquid crystal display device such as a brightness improving film can be used.
  • the polarizing film having the optical functional film include a reflective polarizing film or a semi-transmissive polarizing film in which a reflecting plate or a semi-transmissive reflecting plate is further laminated on the polarizing film, and a retardation plate further formed on the polarizing film.
  • Examples thereof include an elliptically polarized light film or a circularly polarizing film laminated, a wide viewing angle polarizing film obtained by further laminating a viewing angle compensating film on the polarizing film, and a polarizing film obtained by further laminating a brightness improving film on the polarizing film. ..
  • moisture permeability is at 200g / (m 2 ⁇ 24h) or less, a high temperature from the standpoint of polarization degree decrease in inhibition of the polarizing film under a high-humidity environment, it is preferable that moisture permeability is 180g / (m 2 ⁇ 24h) or less, more not less 150g / (m 2 ⁇ 24h) or less preferable.
  • the other transparent protective film or optical functional film (second film on the other side of the polarizing film) is from the viewpoint of production efficiency in the drying process after the polarizing film and the transparent protective film or the optical functional film are bonded together.
  • the moisture permeability is 200g / (m 2 ⁇ 24h) or higher, more preferably 300g / (m 2 ⁇ 24h) or more and a polarization degree reduction of the polarizing film under a high-temperature and high-humidity environment from the viewpoint of suppression, it is preferable that a moisture permeability at 1200g / (m 2 ⁇ 24h) or less, and more preferably 1000g / (m 2 ⁇ 24h) or less.
  • the films on both sides may be the same or different.
  • Functional layers such as a hard coat layer, an antireflection layer, a sticking prevention layer, a diffusion layer and an antiglare layer can be provided on the surface of the transparent protective film or the optical functional film to which the polarizing film is not bonded.
  • the functional layers such as the hard coat layer, the antireflection layer, the sticking prevention layer, the diffusion layer and the antiglare layer can be provided as the film itself, or can be provided separately from the film.
  • the polarizing film and the transparent protective film or the optical functional film, or the polarizing film and the functional layer are usually bonded via an adhesive layer or an adhesive layer.
  • various pressure-sensitive adhesives used in polarizing films can be applied.
  • examples thereof include alkyl ether adhesives, polyvinyl alcohol adhesives, polyvinyl porolidone adhesives, polyacrylamide adhesives, cellulose adhesives and the like.
  • an acrylic pressure-sensitive adhesive is preferable.
  • the pressure-sensitive adhesive layer for example, a method in which the pressure-sensitive adhesive is applied to a separator or the like that has been peeled off, dried to form a pressure-sensitive adhesive layer, and then transferred to a polarizing film or the like, or the pressure-sensitive adhesive is applied. Examples thereof include a method of applying to a polarizing film and the like and drying to form an adhesive layer.
  • the thickness of the pressure-sensitive adhesive layer is not particularly limited, and is, for example, about 1 to 100 ⁇ m, preferably about 2 to 50 ⁇ m.
  • the adhesive for forming the adhesive layer various adhesives used for the polarizing film can be applied.
  • isocyanate-based adhesives polyvinyl alcohol-based adhesives, gelatin-based adhesives, vinyl-based latex-based adhesives, and the like.
  • Water-based polyester and the like can be mentioned.
  • These adhesives are usually used as an adhesive (water-based adhesive) composed of an aqueous solution, and contain 0.5 to 60% by weight of a solid content.
  • the water-based adhesive may contain a cross-linking agent.
  • a cross-linking agent a compound having at least two functional groups in one molecule having reactivity with a component such as a polymer constituting the adhesive is usually used, and for example, alkylenediamines; isocyanates; epoxies; Aldehydes: Amino-formaldehyde and the like such as methylol urea and methylol melamine can be mentioned.
  • the blending amount of the cross-linking agent in the adhesive is usually about 10 to 60 parts by weight with respect to 100 parts by weight of the components such as the polymer constituting the adhesive.
  • examples of the adhesive include active energy ray-curable adhesives such as ultraviolet curable adhesives and electron beam curable adhesives.
  • active energy ray-curable adhesive include (meth) acrylate-based adhesives.
  • examples of the curable component in the (meth) acrylate-based adhesive include a compound having a (meth) acryloyl group and a compound having a vinyl group.
  • examples of the compound having a (meth) acryloyl group include alkyl (meth) acrylates having 1 to 20 carbon atoms, such as chain alkyl (meth) acrylates, alicyclic alkyl (meth) acrylates, and polycyclic alkyl (meth) acrylates.
  • the (meth) acrylate-based adhesives are hydroxyethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N-ethoxymethyl (meth) acrylamide, (meth) acrylamide, and (meth). It may contain a nitrogen-containing monomer such as acrylamide.
  • the (meth) acrylate-based adhesive contains tripropylene glycol diacrylate, 1,9-nonanediol diacrylate, tricyclodecanedimethanol diacrylate, cyclic trimethylolpropane formal acrylate, dioxane glycol diacrylate, and EO as cross-linking components. It may contain a polyfunctional monomer such as modified diglycerin tetraacrylate. Further, a compound having an epoxy group or an oxetanyl group can also be used as the cationic polymerization curable adhesive.
  • the compound having an epoxy group is not particularly limited as long as it has at least two epoxy groups in the molecule, and various generally known curable epoxy compounds can be used.
  • the adhesive may contain an appropriate additive if necessary.
  • the additive include a silane coupling agent, a coupling agent such as a titanium coupling agent, an adhesion promoter such as ethylene oxide, an ultraviolet absorber, a deterioration inhibitor, a dye, a processing aid, an ion trap agent, and an antioxidant.
  • the adhesive may be applied to either the transparent protective film, the optical functional film side (or the functional layer side), or the polarizing film side, or both.
  • a drying step is performed to form an adhesive layer composed of a coating and drying layer. After the drying step, ultraviolet rays or electron beams can be irradiated if necessary.
  • the thickness of the adhesive layer is not particularly limited, and when a water-based adhesive or the like is used, it is preferably about 30 to 5000 nm, more preferably about 100 to 1000 nm, and an ultraviolet curable adhesive. When an electron beam-curable adhesive or the like is used, it is preferably about 0.1 to 100 ⁇ m, and more preferably about 0.5 to 10 ⁇ m.
  • the transparent protective film or the optical functional film and the polarizing film, or the polarizing film and the functional layer are laminated via intervening layers such as a surface modification treatment layer, an easy-adhesion layer, a block layer, and a refractive index adjusting layer. It may have been.
  • Examples of the surface modification treatment for forming the surface modification layer include corona treatment, plasma treatment, primer treatment, and saponification treatment.
  • Examples of the easy-adhesive agent for forming the easy-adhesive layer include a forming material containing various resins having a polyester skeleton, a polyether skeleton, a polycarbonate skeleton, a polyurethane skeleton, a silicone-based, a polyamide skeleton, a polyimide skeleton, a polyvinyl alcohol skeleton, and the like. Can be mentioned.
  • the easy-adhesive layer is usually provided in advance on the film, and the easy-adhesive layer side of the film and the polarizing film are laminated by the adhesive layer or the adhesive layer.
  • the block layer is a layer having a function for preventing impurities such as oligomers and ions eluted from the transparent protective film or the optical functional film from migrating (penetrating) into the polarizing film.
  • the block layer may be a layer having transparency and capable of preventing impurities eluted from the transparent protective film or the optical functional film, and the material forming the block layer may be, for example, a urethane prepolymer type. Examples thereof include a forming material, a cyanoacrylate-based forming material, and an epoxy-based forming material.
  • the refractive index adjusting layer is a layer provided to suppress a decrease in transmittance due to reflection between layers having different refractive indexes such as the transparent protective film or the optical functional film and a polarizing film.
  • the refractive index adjusting material for forming the refractive index adjusting layer include a forming agent containing various resins having silica-based, acrylic-based, acrylic-styrene-based, melamine-based, and the like, and additives.
  • the polarizing film has a single transmittance of 41% or less. From the viewpoint of display panel brightness, the polarizing film preferably has a single transmittance of 30% or more, more preferably 35% or more, and controls the initial degree of polarization to 99.98 or more. From the viewpoint, the single transmittance is preferably 41% or less, and more preferably 40% or less.
  • the single transmittance was measured with a spectrophotometer with an integrating sphere (for example, manufactured by JASCO Corporation, product name: V7100) and measured with a 2 degree field (C light source) of JIS Z8701 to correct the luminosity factor. It is a Y value.
  • the polarizing film preferably has a degree of polarization of 99.98% or more, and more preferably a degree of polarization of 99.99% or more.
  • An adhesive layer for bonding other members may be attached to one surface or both surfaces of the polarizing film.
  • an adhesive layer is suitable.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is not particularly limited, and for example, those using a polymer such as an acrylic polymer, a silicone-based polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluorine-based polymer, or a rubber-based polymer as a base polymer are used. It can be appropriately selected and used.
  • a pressure-sensitive adhesive containing an acrylic polymer which has excellent optical transparency, exhibits appropriate wettability, cohesiveness, and adhesiveness, and has excellent weather resistance, heat resistance, and the like is preferably used.
  • the pressure-sensitive adhesive layer can be attached to one or both sides of the polarizing film by an appropriate method.
  • the pressure-sensitive adhesive layer may be attached, for example, by preparing a pressure-sensitive adhesive solution and directly attaching the pressure-sensitive adhesive solution onto the polarizing film by an appropriate development method such as a casting method or a coating method, or a pressure-sensitive adhesive layer on a separator.
  • a method of forming the above-mentioned material and transferring it onto the polarizing film can be mentioned.
  • the thickness of the pressure-sensitive adhesive layer can be appropriately determined according to the purpose of use, adhesive strength, etc., and is generally 1 to 500 ⁇ m, preferably 5 to 200 ⁇ m, and more preferably 10 to 100 ⁇ m.
  • Such a polarizing film provided with an adhesive layer on at least one surface is also referred to as a polarizing film with an adhesive layer.
  • the exposed surface of the pressure-sensitive adhesive layer is temporarily covered with a separator for the purpose of preventing contamination or the like until it is put into practical use.
  • a separator for example, an appropriate thin leaf body such as a plastic film, a rubber sheet, a paper, a cloth, a non-woven fabric, a net, a foam sheet or a metal foil, or a laminate thereof can be used, if necessary, a silicone-based or long-chain alkyl-based separator.
  • Those coated with an appropriate release agent such as fluorine-based or molybdenum sulfide are used.
  • thermoplastic resin base material an isophthalic acid copolymerized polyethylene terephthalate (IPA copolymerized PET) film (thickness: 100 ⁇ m) was used.
  • IPA copolymerized PET film thinness: 100 ⁇ m
  • One side of the base material is corona-treated, and polyvinyl alcohol (polymerization degree 4200, saponification degree 99.2 mol%) and acetoacetyl-modified PVA (polymerization degree 1200, acetoacetyl modification degree 4.6) are applied to the corona-treated surface.
  • the laminate was dried in an oven at 60 ° C. for 21 seconds (drying treatment) to obtain a laminate having a PVA-based resin layer (polarizing film) having a thickness of 1.2 ⁇ m.
  • a linear polarizing separation film manufactured by 3M Co., Ltd., trade name " DBEF ", after the moisture permeability was bonded to 8.5g / (m 2 ⁇ 24h) ), peeling the thermoplastic resin substrate, the polarization by applying an acrylic adhesive layer having a thickness of 20 ⁇ m on the release surface A film was made.
  • the simple substance transmittance was 39.7%.
  • iodine concentration (% by weight) of the polarizing film was determined using the following formula using a fluorescent X-ray analyzer (manufactured by Rigaku Corporation, trade name "ZSX-PRIMUS IV", measurement diameter: ⁇ 20 mm).
  • Iodine concentration (wt%) 14.474 ⁇ (fluorescent X-ray intensity) / (film thickness) (kcps / ⁇ m)
  • the coefficient for calculating the concentration differs depending on the measuring device, but the coefficient is an appropriate calibration curve. Can be obtained using. The results are shown in Table 1.
  • the degree of polarization of the polarizing film can be measured using a spectrophotometer (manufactured by JASCO Corporation, product name "V7100").
  • the parallel transmittance (H0) is a value of the transmittance of a parallel type laminated polarizing film produced by superimposing two same polarizing films so that their absorption axes are parallel to each other.
  • the orthogonal transmittance (H90) is a value of the transmittance of an orthogonal laminated polarizing film produced by superimposing two identical polarizing films so that their absorption axes are orthogonal to each other.
  • These transmittances are Y values obtained by correcting the luminosity factor with the 2 degree field of view (C light source) of JlS Z 8701-1982. The results are shown in Table 1.
  • Ts 0 the single transmittance of the laminate before heating
  • Ts 96 the single transmittance of the laminate after heating for 96 hours.
  • the cross-linking bath is a cross-linking bath (boron concentration 1.0% by weight, potassium iodide concentration 1.0% by weight, and the compound represented by the above general formula (9).
  • a polarizing film and a polarizing film were produced by the same operation as in Example 1 except that the concentration was changed to 10.0% by weight aqueous solution).
  • Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • Example 3> In the above ⁇ Preparation of polarizing film and polarizing film>, the dyeing bath was changed to a dyeing bath (an aqueous solution having an iodine concentration of 0.7% by weight and a potassium iodide concentration of 4.9% by weight), and the cross-linking bath was changed to a cross-linking bath (boron). Example 1 except that the concentration was changed to 1.0% by weight, the potassium iodide concentration was 1.0% by weight, and the concentration of the compound represented by the general formula (9) was changed to 10.0% by weight.
  • a polarizing film and a polarizing film were produced by the same operation as in the above. Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • the cross-linking bath is a cross-linking bath (boron concentration 1.0% by weight, potassium iodide concentration 1.0% by weight, and the compound represented by the above general formula (8).
  • a polarizing film and a polarizing film were produced by the same operation as in Example 1 except that the concentration was changed to 10.0% by weight aqueous solution).
  • Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • the cross-linking bath is a cross-linking bath (boron concentration 1.0% by weight, potassium iodide concentration 1.0% by weight, and the compound represented by the above general formula (7).
  • a polarizing film and a polarizing film were produced by the same operation as in Example 1 except that the concentration was changed to 10.0% by weight aqueous solution).
  • Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • a straight line is formed as the first film on the polarizing film side of the laminate having the obtained PVA-based resin layer (polarizing film) via an acrylic pressure-sensitive adhesive layer having a thickness of 20 ⁇ m.
  • a PVA-based resin layer is formed so that the thickness of the finally obtained polarizing film is 4.8 ⁇ m to prepare a laminate, and the dyeing bath is used as a dyeing bath (dyeing bath).
  • the dyeing bath is used as a dyeing bath (dyeing bath).
  • change the cross-linking bath to a cross-linking bath boron concentration 1.0% by weight, potassium iodide concentration 1.0% by weight, and the above.
  • a polarizing film and a polarizing film were produced by the same operation as in Example 1 except that the concentration of the compound represented by the general formula (9) was changed to 10.0% by weight aqueous solution).
  • Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • Example 9> In the above ⁇ Preparation of polarizing film and polarizing film>, the dyeing bath was changed to a dyeing bath (an aqueous solution having an iodine concentration of 1.5% by weight and a potassium iodide concentration of 10.5% by weight), and the cross-linking bath was changed to a cross-linking bath (boron). Example 1 except that the concentration was changed to 1.0% by weight, the potassium iodide concentration was 1.0% by weight, and the concentration of the compound represented by the general formula (9) was changed to 15.0% by weight.
  • a polarizing film and a polarizing film were produced by the same operation as in the above. Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • Example 1 except that the cross-linking bath was changed to a cross-linking bath (an aqueous solution having a boron concentration of 1.0% by weight and a potassium iodide concentration of 1.0% by weight) in the above ⁇ Preparation of polarizing film and polarizing film>.
  • a polarizing film and a polarizing film were produced by the same operation as in the above. Table 1 shows the results of the above measurements and evaluations of the polarizing film and the polarizing film.
  • a linear polarizing separation film is used as the first film via an acrylic pressure-sensitive adhesive layer having a thickness of 20 ⁇ m on the polarizing film side of the laminate having a PVA-based resin layer (polarizing film).
  • DBEF trade name
  • the thermoplastic resin base material is peeled off, and a treatment liquid (0.5% by weight of sodium hydrogen carbonate and isopropyl alcohol 50) is used on the peeled surface using a bar coater. Examples except that a weight% aqueous solution: pH 6.0) was applied, dried at 50 ° C.

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Abstract

L'invention concerne un élément polarisant qui est formé en faisant adhérer un film protecteur transparent ou un film fonctionnel optique à au moins une surface d'une membrane de polarisation, la membrane de polarisation étant formée par adsorption et alignement d'iode sur un film d'alcool polyvinylique ; la concentration en iode étant supérieure à 10 % en poids. Le film protecteur transparent ou le film fonctionnel optique est un premier film qui a une perméabilité à la vapeur d'eau de 200 g/(m2∙24 h) maximum ; le film de polarisation a une transmittance unique de 41 % maximum ; et le film de polarisation satisfait la condition selon laquelle le changement (∆Ts) en une seule transmittance représentée par la formule générale (1) (∆Ts(%) = Ts96 – Ts0) est de 0 à 5 %. Dans le film de polarisation, la transmittance unique initiale de la membrane de polarisation ayant une forte teneur en iode est d'au maximum 41 % ; le film est excellent en termes de suppression des diminutions de la transmittance unique due à la coloration du film de polarisation dans des environnements à haute température et est également excellent en termes de suppression des diminutions du degré de polarisation dans des environnements à haute température et à humidité élevée (durabilité de mouillage).
PCT/JP2021/014574 2020-04-08 2021-04-06 Film polarisant WO2021206073A1 (fr)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015180921A (ja) * 2014-03-05 2015-10-15 富士フイルム株式会社 偏光板、および、これを含む液晶表示装置
WO2015163224A1 (fr) * 2014-04-25 2015-10-29 日本化薬株式会社 Élément polarisant contenant de l'iode très durable
WO2018235461A1 (fr) * 2017-06-23 2018-12-27 日東電工株式会社 Film polarisant, plaque polarisante comprenant ledit film polarisant, et dispositif d'affichage d'image embarqué sur un véhicule comprenant ladite plaque polarisante
JP2019053291A (ja) * 2016-07-29 2019-04-04 住友化学株式会社 光学積層体
WO2019103002A1 (fr) * 2017-11-24 2019-05-31 日東電工株式会社 Polariseur et plaque de polarisation
JP2019152862A (ja) * 2018-02-28 2019-09-12 日東電工株式会社 動力走行車両用の補強型偏光性光学フィルム積層体、及び、該補強型偏光性光学フィルム積層体が使用される光学表示パネル
WO2020066125A1 (fr) * 2018-09-25 2020-04-02 日東電工株式会社 Plaque de polarisation et procédé de fabrication associé et dispositif d'affichage d'image comprenant la plaque de polarisation
JP6695014B1 (ja) * 2018-11-12 2020-05-20 日東電工株式会社 偏光膜、偏光フィルム、積層偏光フィルム、画像表示パネル、および画像表示装置、ならびに偏光膜の製造方法
WO2020100861A1 (fr) * 2018-11-12 2020-05-22 日東電工株式会社 Pellicule polarisante, film polarisant, film polarisant stratifié, panneau d'affichage d'image, et dispositif d'affichage d'image
WO2020100869A1 (fr) * 2018-11-12 2020-05-22 日東電工株式会社 Dispositif d'affichage d'image
WO2020184587A1 (fr) * 2019-03-14 2020-09-17 株式会社クラレ Film d'alcool polyvinylique, film polarisant et plaque polarisante
WO2021039784A1 (fr) * 2019-08-28 2021-03-04 日東電工株式会社 Film polarisant, film polarisant stratifié, panneau d'affichage d'image, et dispositif d'affichage d'image

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6857236B2 (ja) 2017-04-03 2021-04-14 日東電工株式会社 偏光子および偏光板

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015180921A (ja) * 2014-03-05 2015-10-15 富士フイルム株式会社 偏光板、および、これを含む液晶表示装置
WO2015163224A1 (fr) * 2014-04-25 2015-10-29 日本化薬株式会社 Élément polarisant contenant de l'iode très durable
JP2019053291A (ja) * 2016-07-29 2019-04-04 住友化学株式会社 光学積層体
WO2018235461A1 (fr) * 2017-06-23 2018-12-27 日東電工株式会社 Film polarisant, plaque polarisante comprenant ledit film polarisant, et dispositif d'affichage d'image embarqué sur un véhicule comprenant ladite plaque polarisante
WO2019103002A1 (fr) * 2017-11-24 2019-05-31 日東電工株式会社 Polariseur et plaque de polarisation
JP2019152862A (ja) * 2018-02-28 2019-09-12 日東電工株式会社 動力走行車両用の補強型偏光性光学フィルム積層体、及び、該補強型偏光性光学フィルム積層体が使用される光学表示パネル
WO2020066125A1 (fr) * 2018-09-25 2020-04-02 日東電工株式会社 Plaque de polarisation et procédé de fabrication associé et dispositif d'affichage d'image comprenant la plaque de polarisation
JP6695014B1 (ja) * 2018-11-12 2020-05-20 日東電工株式会社 偏光膜、偏光フィルム、積層偏光フィルム、画像表示パネル、および画像表示装置、ならびに偏光膜の製造方法
WO2020100861A1 (fr) * 2018-11-12 2020-05-22 日東電工株式会社 Pellicule polarisante, film polarisant, film polarisant stratifié, panneau d'affichage d'image, et dispositif d'affichage d'image
WO2020100869A1 (fr) * 2018-11-12 2020-05-22 日東電工株式会社 Dispositif d'affichage d'image
WO2020184587A1 (fr) * 2019-03-14 2020-09-17 株式会社クラレ Film d'alcool polyvinylique, film polarisant et plaque polarisante
WO2021039784A1 (fr) * 2019-08-28 2021-03-04 日東電工株式会社 Film polarisant, film polarisant stratifié, panneau d'affichage d'image, et dispositif d'affichage d'image

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