WO2014204205A1 - Plaque polarisante et appareil d'affichage d'images la comportant - Google Patents

Plaque polarisante et appareil d'affichage d'images la comportant Download PDF

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Publication number
WO2014204205A1
WO2014204205A1 PCT/KR2014/005366 KR2014005366W WO2014204205A1 WO 2014204205 A1 WO2014204205 A1 WO 2014204205A1 KR 2014005366 W KR2014005366 W KR 2014005366W WO 2014204205 A1 WO2014204205 A1 WO 2014204205A1
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Prior art keywords
film
polarizing plate
epoxy compound
group
weight
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PCT/KR2014/005366
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English (en)
Korean (ko)
Inventor
남성현
서은미
남승희
이대웅
나균일
Original Assignee
주식회사 엘지화학
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Priority claimed from KR1020140073329A external-priority patent/KR101685252B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201480000905.7A priority Critical patent/CN104395788B/zh
Priority to US14/388,153 priority patent/US10353125B2/en
Priority to JP2015534411A priority patent/JP6309012B2/ja
Publication of WO2014204205A1 publication Critical patent/WO2014204205A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/418—Refractive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED

Definitions

  • the present invention relates to a polarizing plate and an image display device including the same, and more particularly, to a polarizing plate having a polyethylene terephthalate film as a protective film on one surface of the polarizer and an image display device including the same.
  • the present invention is a polarizing plate provided with an adhesive layer, a primer layer and a polyethylene terephthalate film on at least one surface of the polarizer in this order
  • the adhesive layer is a first glass transition temperature of the homopolymer 120 °C or more It is formed by an active energy ray-curable adhesive comprising an epoxy compound, a second epoxy compound having a glass transition temperature of 60 ° C. or less, and a cationic photopolymerization initiator
  • the primer layer is made of polyester and polyvinyl alcohol-based resin.
  • the polarizing plate according to the present invention includes an adhesive layer, a primer layer and a polyethylene terephthalate film on at least one surface of the polarizer in this order, wherein the adhesive layer comprises a first epoxy compound having a glass transition temperature of the homopolymer of 120 ° C. or more, It is formed by an active energy ray-curable adhesive comprising a second epoxy compound having a glass transition temperature of homopolymer of 60 ° C. or less and a cationic photopolymerization initiator, and the primer layer is selected from the group consisting of polyester and polyvinyl alcohol resin. Formed by a primer composition comprising at least one binder resin and at least one crosslinking agent selected from the group consisting of an acrylic crosslinking agent, an epoxy crosslinking agent and a polyvinyl alcohol crosslinking agent. It is characterized by that.
  • the polyvinyl alcohol-based polarizer may be produced by a polyvinyl alcohol-based polarizer manufacturing method well known in the art, the production method is not particularly limited.
  • the polarizer usable in the present invention may be prepared by impregnating an unstretched polyvinyl alcohol-based film in an aqueous solution of iodine and / or a dichroic dye, followed by dyeing, crosslinking, and stretching.
  • the polyvinyl alcohol polarizer may be used by purchasing a commercially available product.
  • a polyethylene terephthalate film is attached to at least one surface of the polarizer through an adhesive layer and a primer layer. Since the polyethylene terephthalate film has low moisture permeability and moisture content, when used as a polarizer protective film, not only improves the water resistance of the polarizing plate, but also has excellent resistance to heat and moisture, thereby maintaining excellent optical properties of the polarizing plate even at high temperature and high humidity. . In addition, since the polyethylene terephthalate film is cheaper to produce than other transparent polymer films, there is an advantage that the manufacturing cost of the polarizing plate can be lowered when it is used.
  • the polyethylene terephthalate film usable in the present invention is not limited thereto, but, for example, water vapor transmission rate (WVTR) is 100 g / m 2 ⁇ day or less, preferably 10 to 50 g / m 2 ⁇ day, the moisture content is 1% by weight or less, preferably 0.1 to 0.6% by weight. It is because the water resistance and the durability improvement effect under high temperature, high humidity appear more when water vapor transmission rate and moisture content rate satisfy
  • WVTR water vapor transmission rate
  • the polyethylene terephthalate film usable in the present invention is not limited thereto, but may be a film having a low refractive index layer formed of a material having a refractive index of about 1.4 to 1.5 on at least one surface thereof.
  • the polyethylene terephthalate film has a refractive index of 1.65, which is relatively higher than that of a TAC film.
  • the low refractive index layer may be formed on one side or both sides of the polyethylene terephthalate film, preferably may be formed on the opposite side of the surface on which the primer layer is formed.
  • the low refractive index layer may be formed by a resin composition in which a low refractive index material is mixed with a polymer resin having a low refractive index.
  • a polymer resin for example, an acrylic resin may be used, and the low refractive index may be used.
  • Materials include 1,1,1-trifluoroethane, polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE, Teflon) hydrofluoro ether, hydrochloro fluorocarbons, fluorocarbons, perfluorocarbons, Fluoro-based compounds such as perfluoropolyether, Perfluorooctanoic acid (PFOA), Perfluorooctane sulfonate (PFOS), perfluoroalkoxy fluoropolymer, or silica-based compounds may be used. have.
  • the total refractive index of the polyethylene terephthalate film is about 1.48 to 1.55, preferably about 1.50 to 1.53.
  • the total refractive index means not only the refractive index of the single polyethylene terephthalate film, but also the effective refractive index of the polyethylene terephthalate film including other functional coating layers.
  • the effective refractive index of the low refractive index layer and the polyethylene terephthalate film, which is a functional coating layer is the total refractive index.
  • a polyethylene terephthalate film may be attached to both sides of the polarizer, a polyethylene terephthalate film may be attached to one surface of the polarizer, and a transparent polymer film other than the polyethylene terephthalate film may be attached to the other surface of the polarizer.
  • the transparent polymer film attached to the other surface of the polarizer is a polarizer protective film or a compensation film for compensating the optical characteristics of the polarizer, and the material thereof is not particularly limited, and a polymer film known in the art may be used.
  • the transparent polymer film attached to the other surface is preferably selected from the group consisting of a triacetyl cellulose film, a cycloolefin polymer film, a polyester film, a polycarbonate film, and an acrylic film.
  • the transparent polymer film attached to the other surface may have optically isotropic or anisotropic, for example, having a phase difference value that can cancel the optical anisotropy of the polyethylene terephthalate film, or with a polyethylene terephthalate film It may have a suitable phase difference value that can compensate for the viewing angle characteristics of the liquid crystal display device applied in combination.
  • the polyethylene terephthalate film and the transparent polymer film may be subjected to a surface treatment for improving adhesion when necessary, for example, selected from the group consisting of alkali treatment, corona treatment, and plasma treatment on at least one surface of the optical film. At least one surface treatment may be performed.
  • the polarizer and the polyethylene terephthalate film are attached by an active energy ray curable adhesive.
  • the active energy ray-curable adhesive means an adhesive that is cured by irradiation of active energy rays.
  • the active energy ray-curable adhesives usable in the present invention include (1) a first epoxy compound having a glass transition temperature of homopolymer of 120 ° C. or more (2) a second epoxy compound having a glass transition temperature of homopolymer of 60 ° C. or less and (3) It is preferable to include a photo cationic polymerization initiator.
  • the active energy ray-curable adhesive includes (1) 100 parts by weight of the first epoxy compound having a glass transition temperature of homopolymer of 120 ° C. or more, and (2) a second epoxy having a glass transition temperature of homopolymer of 60 ° C. or less. It is preferred to include 30 to 100 parts by weight of the compound, and 0.5 to 20 parts by weight of the (3) photo cationic polymerization initiator.
  • the homopolymer having a low glass transition temperature plays an advantageous role in adhesion and viscosity, and when the homopolymer having a high glass transition temperature is used together, the glass transition temperature does not decrease. It is advantageous in thermal shock.
  • the first epoxy compound may be used without particular limitation as long as the glass transition temperature of the homopolymer is 120 ° C. or higher.
  • the alicyclic epoxy compound and / or the aromatic epoxy having a glass transition temperature of the homo polymer is 120 ° C. or higher. May be used as the first epoxy compound of the present invention.
  • Specific examples of the epoxy compound having a glass transition temperature of homopolymer of 120 ° C. or higher include 3,4-epoxycyclohexylmethyl-3,4′-epoxycyclohexanecarboxylate, vinylcyclohexenedioxide dicyclopentadiene dioxide, and bisepoxycyclo.
  • the first epoxy compound is more preferably the glass transition temperature of the homopolymer is about 120 °C to 200 °C.
  • the second epoxy compound may be used without particular limitation as long as the glass transition temperature of the homopolymer is an epoxy compound of 60 ° C. or less.
  • an alicyclic epoxy compound, an aliphatic epoxy compound, or the like may be used as the second epoxy compound.
  • aliphatic polyhydric alcohol for example, an aliphatic polyhydric alcohol having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms or 2 to 4 carbon atoms may be exemplified.
  • the adhesive composition for a polarizing plate of the present invention may further include a silane coupling agent, as necessary, with the above components.
  • a silane coupling agent when included, the silane coupling agent lowers the surface energy of the adhesive, thereby improving the adhesive wetting property.
  • (meth) acrylates having one (meth) acryloyl group in a molecule include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, Butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (Meth) acrylate, 1, 4- cyclohexane dimethylol mono (meth) acrylate
  • the adhesive layer has a thickness of about 10 ⁇ m or less, preferably about 0.1 to 5 ⁇ m. When the thickness of the adhesive layer exceeds 10 ⁇ m, a problem of wrinkles in the appearance of the polarizing plate may occur. When the thickness of the adhesive layer is 0.1 ⁇ m or more, it is more preferable in terms of uniformity and adhesive strength of the adhesive layer.
  • the polarizing plate of this invention contains the primer layer for improving the adhesive force of an adhesive bond layer and a polyethylene terephthalate film between an adhesive bond layer and a polyethylene terephthalate film.
  • the primer layer of the present invention is not limited thereto, but for example, at least one binder resin selected from the group consisting of polyester and polyvinyl alcohol resins, acrylic crosslinking agents, epoxy crosslinking agents, and polyvinyl alcohol crosslinking agents. It may be formed by a primer composition comprising at least one crosslinking agent selected from the group consisting of.
  • the epoxy-based crosslinking agent is not limited thereto, but may include an alicyclic epoxy group or an aromatic epoxy group.
  • the primer composition may further include components such as waxes, organic fine particles, inorganic fine particles, antifoaming agents, thickeners, lubricants, antioxidants, and the like, in addition to the above components, as necessary, in a range that does not impair the physical properties of the primer composition. .
  • the water contact angle of the surface of the primer layer of the present invention is preferably 40 to 100 degrees, more preferably 50 to 90 degrees, still more preferably 60 to 80 degrees. If the water contact angle is less than 40 degrees, since the hydrophilicity of the primer layer is strong, it may react with the iodine of the polarizer to inhibit the iodine arrangement, resulting in the discoloration of the group color and the polarization degree. If the water contact angle exceeds 100 degrees, the primer layer The hydrophobicity of is so strong that adhesion with the polarizer is difficult.
  • the polyethylene terephthalate film is attached to one surface of the polarizer, and even when the other type of film is attached to the other surface, the curling properties are excellent, as well as durability, single transmittance, polarization degree, and the like. Properties such as color are also very good.
  • the polarizing plate of the present invention has excellent optical properties with a single transmittance of about 40 to 45% and a polarization degree of 99% or more, and when immersed in water at 60 ° C. for 24 hours, discoloration of the polarizing plate in the MD direction is less than 10 mm. It has excellent water resistance.
  • the polarizing plate of the present invention as described above can be usefully applied to an image display device such as a liquid crystal display device or an organic EL display device.
  • the image display apparatus of the present invention may be a liquid crystal display including a liquid crystal panel and polarizing plates provided on both sides of the liquid crystal panel, wherein at least one of the polarizing plates may be a polarizing plate according to the present invention. have.
  • the type of liquid crystal panel included in the liquid crystal display device is not particularly limited.
  • a panel of a passive matrix type such as, but not limited to, a twisted nematic (TN) type, a super twisted nematic (STN) type, a ferrolectic (F) type, or a polymer dispersed (PD) type; Active matrix panels, such as two-terminal or three-terminal; All known panels, such as an In Plane Switching (IPS) panel and a Vertical Alignment (VA) panel, can be applied.
  • IPS In Plane Switching
  • VA Vertical Alignment
  • other configurations constituting the liquid crystal display device for example, types of upper and lower substrates (eg, color filter substrates or array substrates) are not particularly limited, and configurations known in the art may be employed without limitation. Can be.
  • the adhesive A prepared in Preparation Example 1 was applied to both sides of the polarizer, the polyethylene terephthalate film and the triacetyl cellulose film (NRT film) were laminated, and then passed through a laminator. At this time, the primer layer of the polyethylene terephthalate film was laminated so that the adhesive layer. Then, using a UV irradiation device (metal halide lamp), the polarizing plate made of a structure of PET film / primer layer / adhesive layer / polarizer / adhesive layer / NRT film by irradiating 500mJ / cm 2 ultraviolet rays to cure the adhesive layer was prepared.
  • a UV irradiation device metal halide lamp
  • a polarizing plate was manufactured in the same manner as in Example 1, except that a corona treated triacetylcellulose film (manufacturer: Fuji Film, trade name: UZ TAC) was used instead of the polyethylene terephthalate film having a primer layer formed thereon.
  • the prepared polarizing plate produced a polarizing plate composed of a structure of UZ TAC film / adhesive layer / polarizer / adhesive layer / NRT film.
  • a primer composition including a polyester resin and an acrylic crosslinking agent was coated on one surface of the polyethylene terephthalate film to prepare a polyethylene terephthalate film having a primer layer formed thereon.
  • Corona treated triacetylcellulose film (manufacturer: Fujifilm, brand name: NRT) was prepared.
  • an aqueous adhesive including acetoacetyl group-modified polyvinyl alcohol-based resin and glyoxalate as a crosslinking agent was applied to both sides of the polarizer, and the polyethylene terephthalate film and the triacetyl cellulose film (NRT film) were laminated, and then a laminator Passed.
  • the primer layer of the polyethylene terephthalate film was laminated so that the adhesive layer.
  • the adhesive layer was cured by drying in an oven at 80 ° C. for 5 minutes to prepare a polarizing plate having a structure of PET film / primer layer / adhesive layer / polarizer / adhesive layer / NRT film.
  • a polarizing plate was manufactured in the same manner as in Comparative Example 2, except that a corona-treated triacetylcellulose film (manufacturer: Fuji Film, trade name: UZ TAC) was used instead of the polyethylene terephthalate film having a primer layer formed thereon.
  • the prepared polarizing plate produced a polarizing plate composed of a structure of UZ TAC film / adhesive layer / polarizer / adhesive layer / NRT film.
  • a polarizing plate was manufactured in the same manner as in Example 1, except that a polyethylene terephthalate film without a primer layer was used.
  • the polarizer produced It was a structure of PET film / adhesive layer / polarizer / adhesive layer / NRT film.
  • a polarizing plate was manufactured in the same manner as in Example 1, except that a primer composition including a polyester resin and a urethane crosslinking agent was used instead of a primer composition including a polyester resin and an epoxy crosslinking agent.
  • a polarizing plate was manufactured in the same manner as in Example 1, except that a primer composition including a polyurethane resin was used instead of a primer composition including a polyester resin and an epoxy-based crosslinking agent.
  • Example 1 After the polarizing plate prepared in Example 1 and the polarizing plate prepared in Comparative Example 1 were immersed in water at a temperature of 60 ° C. for 24 hours, the polarizing plate state was visually observed. 8 is a photograph showing a state after immersing the polarizing plates of Example 1 and Comparative Example 1 for 24 hours. 8, in the case of the polarizing plate of Example 1, there was almost no change even after 24 hours of immersion, whereas the polarizing plate of Comparative Example 1 began to discolor in the terminal portion after 4 hours of immersion, and after the 24 hours of immersion, a large polarizing plate It can be seen that discoloration has occurred.
  • a primer composition comprising a polyester resin and an epoxy-based crosslinking agent on a polyethylene terephthalate film coated with a low refractive index layer formed by applying an acrylic resin mixed with 1,1,1-trifluoroethane on one surface (polyester resin and A polyethylene terephthalate film having a primer layer was prepared by coating a resin composition (manufacturer: TAKAMATSU, trade name: A115GE) 40 parts by weight, 3 parts by weight of silica and 57 parts by weight of water) blended with an epoxy-based crosslinking agent.
  • TAKAMATSU trade name: A115GE
  • the poly (N-cyclohexanemaleimide-co-methyl methacrylate-co- ⁇ -methyl-styrene) resin composition was supplied to an extruder of 24 ⁇ which was nitrogen-substituted from the raw material hopper to the extruder and melted at 240 ° C.
  • a raw pellet pellet
  • the obtained raw material pellets were vacuum dried, then fed from an raw material hopper to a twin extruder substituted with nitrogen, melted with an extruder at 260 ° C., passed through a T-die of a coat hanger type, and a chrome plated casting roll and An acrylic optical film was manufactured through a drying roll.
  • the optical film thus prepared was held at 135 ° C. for 2 minutes using a biaxial stretching machine, and then stretched at 100% in the MD direction and 100% in the TD direction to prepare an acrylic film.
  • the adhesive A prepared in Preparation Example 1 was applied to both sides of the polarizer, the polyethylene terephthalate film and the acrylic film were laminated, and then passed through a laminator. At this time, the primer layer of the polyethylene terephthalate film and the acrylic film was laminated so that the adhesive layer. Then, using UV irradiation device (metal halide lamp), by irradiating UV light of 500mJ / cm 2 to cure the adhesive layer to the structure of PET film / primer layer / adhesive layer / polarizer / adhesive layer / primer layer / acrylic film A polarizing plate made of was prepared.
  • UV irradiation device metal halide lamp
  • a polarizing plate was manufactured in the same manner as in Example 2 except for using a corona treated corona treated triacetylcellulose film (manufacturer: Fuji Film, trade name: NRT) instead of the polyethylene terephthalate film having a primer layer formed thereon.
  • the produced polarizing plate was a structure of NRT film / adhesive layer / polarizer / adhesive layer / primer layer / acrylic film.
  • Example 2 including the PET film having the low refractive index layer was confirmed that compared with Comparative Example 7, showing the same degree of polarization degree and at the same time improve the single transmittance.
  • Example 2 The polarizing plates prepared in Example 2 and Comparative Example 7 were placed in an oven at 80 ° C. for 100 hours, then left at room temperature for 12 hours, and then the degree of change in optical properties and color was measured. The measurement results are shown in [Table 2].

Abstract

La présente invention concerne une plaque polarisante comprenant, dans l'ordre suivant, une couche d'adhésif, une couche d'apprêt et un film de polyéthylène téréphtalate placés sur au moins une face d'un polariseur. Dans la présente invention, la couche d'adhésif est formée d'un adhésif durcissable par des rayons d'énergie active comportant: un premier composé époxy caractérisé en ce que la température de transition vitreuse d'un homopolymère est d'au moins 120 ℃; un deuxième composé époxy caractérisé en ce que la température de transition vitreuse d'un homopolymère est d'au plus 60 ℃; et un initiateur de photo-polymérisation cationique, et la couche d'apprêt est formée d'une composition d'apprêt comportant: au moins une résine liante choisie dans le groupe constitué du polyester et d'une résine à base de polyalcool de vinyle; et au moins un agent de réticulation choisi dans le groupe constitué d'un agent de réticulation à base d'acryl, d'un agent de réticulation à base d'époxy et d'un agent de réticulation à base de polyalcool de vinyle.
PCT/KR2014/005366 2013-06-18 2014-06-18 Plaque polarisante et appareil d'affichage d'images la comportant WO2014204205A1 (fr)

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CN201480000905.7A CN104395788B (zh) 2013-06-18 2014-06-18 偏光板和包括该偏光板的图像显示装置
US14/388,153 US10353125B2 (en) 2013-06-18 2014-06-18 Polarizing plate and image display device including the same
JP2015534411A JP6309012B2 (ja) 2013-06-18 2014-06-18 偏光板およびこれを含む画像表示装置

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KR1020140073329A KR101685252B1 (ko) 2013-06-18 2014-06-17 편광판 및 이를 포함하는 화상표시장치

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