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WO2019088192A1 - Plaque de polarisation dotée d'une couche antireflet et son procédé de production - Google Patents

Plaque de polarisation dotée d'une couche antireflet et son procédé de production Download PDF

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Publication number
WO2019088192A1
WO2019088192A1 PCT/JP2018/040572 JP2018040572W WO2019088192A1 WO 2019088192 A1 WO2019088192 A1 WO 2019088192A1 JP 2018040572 W JP2018040572 W JP 2018040572W WO 2019088192 A1 WO2019088192 A1 WO 2019088192A1
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WIPO (PCT)
Prior art keywords
layer
polarizing plate
polarizer
laminate
protective layer
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Application number
PCT/JP2018/040572
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English (en)
Japanese (ja)
Inventor
政和 望月
将寛 八重樫
章典 伊▲崎▼
▲吉▼紹 北村
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Nitto Denko Corp
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Nitto Denko Corp
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Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to CN202511488159.7A priority Critical patent/CN121165238A/zh
Priority to CN201880071645.0A priority patent/CN111295605A/zh
Priority to KR1020207007898A priority patent/KR102405568B1/ko
Publication of WO2019088192A1 publication Critical patent/WO2019088192A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
    • 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 plate with an antireflection layer and a method of manufacturing the same.
  • a polarizing plate is often disposed on at least one side of a display cell due to the image forming method.
  • an anti-reflection layer may be provided on the viewing side to prevent reflection of external light on the display screen (antireflection processing is performed).
  • the polarizing plate provided with the conventional antireflection layer has a problem that the dimensional change under a high temperature and high humidity environment is large, and the warpage (in particular, the warpage of the convex on the viewing side) is remarkable. As a result, the display cell to which the polarizing plate is applied may be warped, which may adversely affect the display characteristics of the image display device.
  • the present invention has been made to solve the above-mentioned problems, and its main object is to provide a polarizing plate with an antireflection layer in which dimensional change is small even under high temperature and high humidity environment and warpage is suppressed. .
  • the antireflective layer-attached polarizing plate of the present invention comprises a polarizer and a polarizing plate having a protective layer provided on one side of the polarizer, a substrate bonded to the protective layer, and the substrate directly And the formed antireflection layer, and the moisture content of the polarizing plate is 0.5% by weight or more.
  • the moisture permeability of the protective layer is not more than 1.0g / m 2 / 24hr.
  • the protective layer comprises (meth) acrylic resin.
  • the substrate has a hard coat layer on the surface on the side of the antireflective layer.
  • the anti-reflection layer-attached polarizing plate further includes a first retardation layer having a refractive index characteristic of nx>ny> nz on the side opposite to the protective layer of the polarizer.
  • the anti-reflection layer polarizing plate has a second retardation layer having a refractive index characteristic of nz>nx> ny on the opposite side of the first retardation layer to the polarizer. Further equipped.
  • the dimensional change rate in the absorption axis direction of the polarizer after holding for 500 hours at 65 ° C. and 90% RH in the polarizing plate with an antireflection layer is less than 0.10%.
  • the curl which may occur after holding for 500 hours at 65 ° C. and 90% RH in the polarizing plate with an antireflection layer is a convex on the opposite side to the antireflection layer.
  • a method of producing the above-mentioned polarizing plate with an antireflection layer produces a polarizer laminate including a polarizer and a protective layer; forming an antireflection layer on a substrate to produce an antireflection laminate; and a protective layer of the polarizer laminate Bonding the substrate of the antireflective laminate to the surface.
  • the antireflective layer is formed by sputtering.
  • the moisture content of the polarizing plate in the polarizing plate with an antireflection layer is 0.5% by weight or more, the dimensional change is small even in a high temperature and high humidity environment, and the warpage is suppressed.
  • a polarizing plate can be realized.
  • FIG. 1 is a schematic cross-sectional view of a polarizing plate with an antireflection layer according to one embodiment of the present invention.
  • FIG. 1 is a schematic cross-sectional view of an antireflection layer-attached polarizing plate according to an embodiment of the present invention.
  • the anti-reflection layer-attached polarizing plate 100 includes a polarizing plate 10 having a polarizer 11 and a protective layer 12, a base 20, and an anti-reflection layer 30 in this order.
  • the substrate 20 is typically bonded to the protective layer 12 of the polarizing plate 20 via any appropriate adhesive layer (adhesive layer, adhesive layer: not shown).
  • the adhesive layer is typically an acrylic pressure-sensitive adhesive layer.
  • the antireflective layer 30 is formed directly on the substrate 20. In the present specification, "directly" means that the adhesive layer does not intervene.
  • the substrate 20 may have a hard coat layer and / or an adhesion layer (neither is shown) on the surface on the side of the antireflective layer 30.
  • This configuration is also included in the form that "the antireflective layer is formed directly on the substrate”. If necessary, an antifouling layer (not shown) may be provided on the surface of the antireflective layer 30.
  • the moisture content of the polarizing plate 10 is 0.5% by weight or more, preferably 0.6% by weight or more, more preferably 0.8% by weight or more, and still more preferably It is 1.0% by weight or more.
  • the upper limit of the moisture content of the polarizing plate is, for example, 1.5% by weight. This moisture content is higher than the moisture content of the polarizing plate in a conventional polarizing plate with an antireflection layer.
  • a polarizing plate with an antireflection layer preferably has a dimensional change in the absorption axis direction of the polarizer of less than 0.10% after holding for 500 hours at 65 ° C. and 90% RH. Is not more than 0.08%, more preferably not more than 0.06%.
  • the polarizing plate with an anti-reflection layer according to the embodiment of the present invention has the direction of the curling usually even if the curling occurs even in a high temperature and high humidity environment. And in the opposite direction.
  • the curl that may occur after holding for 500 hours at 65 ° C. and 90% RH is the opposite side to the antireflection layer (the opposite side to the viewing side) Is convex.
  • the curl is often convex on the side of the antireflection layer.
  • the antireflective layer polarizing plate according to the embodiment of the present invention is applied to an image display device by the synergistic effect of the dimensional change suppression and the curling direction due to the polarizing plate having a high moisture content. When it is done, it is possible to significantly suppress warping, peeling and / or deterioration of display characteristics under a high temperature and high humidity environment.
  • the protective layer 12 is provided only on one side of the polarizer 11 in the illustrated example, another protective layer may be provided on the opposite side of the protective layer 12 depending on the purpose.
  • protective layers may be provided on both sides of the polarizer, and the protective layer 12 may be omitted and only another protective layer may be provided.
  • the substrate 30 can function as a visible side protective layer.
  • any appropriate functional layer may be provided depending on the purpose.
  • a phase difference layer and a conductive layer are mentioned as a representative example of a functional layer.
  • the type, number, combination, arrangement position, and characteristics of the functional layers may be appropriately set according to the purpose.
  • a first retardation layer (not shown) having refractive index characteristics of nx> ny> nz may be provided on the side opposite to the protective layer 12 of the polarizer 11.
  • a second retardation layer having a refractive index characteristic of nz> nx> ny may be further provided on the opposite side to the polarizer of the first retardation layer.
  • the first retardation layer may double as a protective layer on the side opposite to the viewing side of the polarizer.
  • the angle between the slow axis of the retardation layer (if present) and the absorption axis of the polarizer is the purpose, the in-plane retardation of the retardation layer, the thickness direction retardation, the refractive index It may be set appropriately according to the characteristics and the like.
  • a conductive layer may be provided on the side opposite to the protective layer 12 of the polarizer 11. By providing the conductive layer at such a position, the anti-reflection layer polarizing plate can be suitably used for the inner touch panel type input display device. In this case, the retardation layer may or may not be present.
  • Polarizing plate B-1 Polarizer
  • the polarizer 11 is typically composed of a resin film containing a dichroic substance.
  • any appropriate resin film which can be used as a polarizer can be adopted.
  • the resin film is typically a polyvinyl alcohol resin (hereinafter referred to as "PVA resin”) film.
  • any appropriate resin may be used as the PVA-based resin forming the above-mentioned PVA-based resin film.
  • polyvinyl alcohol and ethylene-vinyl alcohol copolymer can be mentioned.
  • Polyvinyl alcohol is obtained by saponifying polyvinyl acetate.
  • the ethylene-vinyl alcohol copolymer is obtained by saponifying an ethylene-vinyl acetate copolymer.
  • the saponification degree of the PVA-based resin is usually 85 mol% to 100 mol%, preferably 95.0 mol% to 99.95 mol%, and more preferably 99.0 mol% to 99.93 mol%. .
  • the degree of saponification can be determined according to JIS K 6726-1994. By using a PVA resin having such a degree of saponification, a polarizer excellent in durability can be obtained. If the degree of saponification is too high, gelation may occur.
  • the average degree of polymerization of the PVA-based resin can be appropriately selected depending on the purpose.
  • the average degree of polymerization is usually 1000 to 10000, preferably 1200 to 4500, and more preferably 1500 to 4300.
  • the average degree of polymerization can be determined according to JIS K 6726-1994.
  • iodine As a dichroic substance contained in a resin film, iodine, an organic dye, etc. are mentioned, for example. These may be used alone or in combination of two or more. Preferably, iodine is used.
  • the iodine complex contained in the resin film (polarizer) is appropriately reduced, so for example, the non-polarization part having suitable characteristics when used in a camera part It is because it can form.
  • the resin film may be a single layer resin film or a laminate of two or more layers.
  • the polarizer comprised from the resin film of a single layer the thing in which the dyeing
  • the staining with iodine is performed, for example, by immersing a PVA-based film in an aqueous iodine solution.
  • the stretching ratio of the uniaxial stretching is preferably 3 to 7 times. Stretching may be carried out after the dyeing process or may be carried out while dyeing. Moreover, it may be dyed after being drawn.
  • the PVA resin film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment, and the like.
  • the polarizer obtained by using a laminate a laminate of a resin substrate and a PVA-based resin layer (PVA-based resin film) laminated on the resin substrate, or a resin substrate and the resin
  • coated-formed to the base material is mentioned.
  • coated and formed by the said resin base material applies a PVA-type resin solution to a resin base material, for example, it is made to dry, and a resin base material Forming a PVA-based resin layer thereon to obtain a laminate of the resin base and the PVA-based resin layer; stretching and dyeing the laminate to make the PVA-based resin layer as a polarizer; obtain.
  • stretching typically includes dipping the laminate in a boric acid aqueous solution and stretching.
  • stretching may optionally further comprise air-stretching the laminate at a high temperature (eg, 95 ° C. or higher) prior to stretching in an aqueous boric acid solution.
  • the resulting laminate of resin substrate / polarizer may be used as it is (that is, the resin substrate may be used as a protective layer of polarizer), and the resin substrate is peeled off from the laminate of resin substrate / polarizer.
  • any appropriate protective layer depending on the purpose may be laminated on the peeled surface.
  • the details of the method for producing such a polarizer are described, for example, in JP-A-2012-73580. The publication is incorporated herein by reference in its entirety.
  • the thickness of the polarizer is preferably 15 ⁇ m or less, more preferably 1 ⁇ m to 12 ⁇ m, still more preferably 3 ⁇ m to 10 ⁇ m, and particularly preferably 3 ⁇ m to 8 ⁇ m. If the thickness of the polarizer is in such a range, curling at the time of heating can be favorably suppressed, and good appearance durability at the time of heating can be obtained. Furthermore, if the thickness of the polarizer is in such a range, it can contribute to thinning of the polarizing plate with an antireflection layer (as a result, the image display device).
  • the polarizer preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm.
  • the single transmittance of the polarizer is preferably 43.0% to 46.0%, and more preferably 44.5% to 46.0%.
  • the polarization degree of the polarizer is preferably 97.0% or more, more preferably 99.0% or more, and still more preferably 99.9% or more.
  • any appropriate resin film is used as the protective layer 12.
  • cellulose resins such as (meth) acrylic resins, diacetyl cellulose and triacetyl cellulose, cycloolefin resins such as norbornene resins, olefin resins such as polypropylene, polyethylene terephthalate resins And ester resins, polyamide resins, polycarbonate resins, copolymer resins thereof, and the like.
  • (meth) acrylic-type resin means acrylic resin and / or methacrylic resin.
  • a (meth) acrylic resin having a glutarimide structure is used as the (meth) acrylic resin.
  • (meth) acrylic resins having a glutarimide structure include, for example, JP-A-2006-309033, JP-A-2006-317560, and JP-A-2006-328329, and JP-A-2006-328329.
  • 2006-328334 JP-A 2006-337491, JP-A 2006-337492, JP-A 2006-337493, JP-A 2006-337569, JP-2007-009182, JP-2009- No. 161744 and Japanese Patent Application Laid-Open No. 2010-284840. These descriptions are incorporated herein by reference.
  • Moisture permeability of the protective layer 12 is preferably not more than 1.0g / m 2 / 24hr, more preferably not more than 0.8g / m 2 / 24hr, more preferably below 0.6g / m 2 / 24hr There, particularly preferably not more than 0.4g / m 2 / 24hr. If the moisture permeability of the protective layer is in such a range, dimensional change under a high temperature and high humidity environment can be further suppressed.
  • the thickness of the protective layer is typically 10 ⁇ m to 100 ⁇ m, preferably 20 ⁇ m to 40 ⁇ m.
  • the protective layer is typically laminated to the polarizer via an adhesive layer (specifically, an adhesive layer, an adhesive layer).
  • the adhesive layer is typically formed of a PVA-based adhesive or an activated energy ray-curable adhesive.
  • the pressure-sensitive adhesive layer is typically formed of an acrylic pressure-sensitive adhesive.
  • the substrate 20 is used to form the antireflective layer 30.
  • the polarizing plate can be subjected to an antireflective layer forming process (typically, sputtering). There is no need to offer. As a result, since the polarizing plate is not exposed to high temperature, the moisture content of the polarizing plate can be maintained in the above-mentioned desired range.
  • any appropriate resin film is used as a substrate.
  • the material for forming the resin film include polyester resins such as polyethylene terephthalate (PET), cycloolefin resins such as norbornene resin, and addition of cycloolefin (for example, norbornene) and ⁇ -olefin (for example, ethylene)
  • PET polyethylene terephthalate
  • cycloolefin resins such as norbornene resin
  • ⁇ -olefin for example, ethylene
  • a cellulose resin such as a resin (COC) obtained by polymerization and triacetyl cellulose (TAC) can be mentioned.
  • the thickness of the substrate can be appropriately set depending on the purpose.
  • the thickness of the substrate is typically 20 ⁇ m to 200 ⁇ m, preferably 25 ⁇ m to 100 ⁇ m.
  • a hard coat layer may be formed on the surface of the base on the side of the antireflection layer.
  • the hard coat layer By forming the hard coat layer, there is an advantage that the adhesion between the substrate and the antireflective layer can be improved. Furthermore, the reflectance can be further reduced by appropriately adjusting the difference in refractive index between the hard coat layer and the antireflective layer.
  • the hard coat layer preferably has sufficient surface hardness, excellent mechanical strength, and excellent light transmission.
  • the hard coat layer may be formed of any suitable resin as long as it has such desired properties.
  • Specific examples of the resin include thermosetting resins, thermoplastic resins, ultraviolet curable resins, electron beam curable resins, and two-component mixed resins. UV curable resins are preferred. This is because the hard coat layer can be formed by simple operation and high efficiency.
  • UV curable resin examples include polyester-based, acrylic-based, urethane-based, amide-based, silicone-based, and epoxy-based ultraviolet-curable resins.
  • UV curable resins include UV curable monomers, oligomers, and polymers.
  • a resin composition containing an acrylic monomer component or oligomer component having preferably 2 or more, more preferably 3 to 6 of ultraviolet polymerizable functional groups can be mentioned.
  • the ultraviolet curable resin contains a photopolymerization initiator.
  • the hard coat layer may be formed by any appropriate method.
  • the hard coat layer may be formed by applying a resin composition for forming a hard coat layer on a substrate, drying it, and irradiating the dried coating film with ultraviolet rays to cure it.
  • the thickness of the hard coat layer is, for example, 0.5 ⁇ m to 20 ⁇ m, preferably 1 ⁇ m to 15 ⁇ m.
  • any appropriate configuration may be adopted as the configuration of the anti-reflection layer.
  • a typical constitution of the antireflective layer (1) a single layer of a low refractive index layer having a refractive index of about 1.35 to 1.55 having an optical film thickness of 120 nm to 140 nm; (2) from the substrate side A laminate having a middle refractive index layer, a high refractive index layer, and a low refractive index layer in order; (3) an alternating multilayer laminate of a high refractive index layer and a low refractive index layer;
  • Examples of the material that can form the low refractive index layer include silicon oxide (SiO 2 ) and magnesium fluoride (MgF 2 ).
  • the refractive index of the low refractive index layer is typically about 1.35 to 1.55.
  • Examples of materials capable of forming a high refractive index layer include titanium oxide (TiO 2 ), niobium oxide (Nb 2 O 3 or Nb 2 O 5 ), tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO), ZrO 2 -TiO 2 is mentioned.
  • the refractive index of the high refractive index layer is typically about 1.60 to 2.20.
  • a material which can form a middle refractive index layer for example, titanium oxide (TiO 2 ), a mixture of a material which can form a low refractive index layer and a material which can form a high refractive index layer (for example, titanium oxide and oxide) Mixtures with silicon).
  • the refractive index of the middle refractive index layer is typically about 1.50 to 1.85.
  • the thicknesses of the low refractive index layer, the medium refractive index layer, and the high refractive index layer may be set so as to realize an appropriate optical film thickness according to the layer structure of the antireflection layer, desired antireflection performance, and the like.
  • the antireflective layer is typically formed by a dry process.
  • the dry process include a PVD (Physical Vapor Deposition) method and a CVD (Chemical Vapor Deposition) method.
  • PVD Physical Vapor Deposition
  • CVD Chemical Vapor Deposition
  • a PVD method a vacuum evaporation method, a reactive evaporation method, an ion beam assist method, a sputtering method, an ion plating method may be mentioned.
  • CVD method plasma CVD method is mentioned.
  • it is a sputtering method. This is because film formation with less unevenness in film thickness can be achieved.
  • the thickness of the antireflective layer is, for example, about 20 nm to 300 nm.
  • the difference between the maximum reflectance and the minimum reflectance in the wavelength range of 400 nm to 700 nm is preferably 2.0% or less, more preferably 1.9% or less, and still more preferably 1.8. % Or less. If the difference between the maximum reflectance and the minimum reflectance is in such a range, coloring of the reflected light can be well prevented.
  • an antifouling layer may be provided on the surface of the antireflective layer.
  • the antifouling layer contains, for example, a fluorine group-containing silane compound (for example, an alkoxysilane compound having a perfluoropolyether group) or a fluorine group-containing organic compound.
  • the antifouling layer preferably exhibits water repellency with a water contact angle of 110 degrees or more.
  • the method for producing a polarizing plate with antireflection layer is to produce a polarizer laminate including a polarizer and a protective layer, an antireflection layer on a substrate Forming the antireflective laminate, and bonding the base of the antireflective laminate to the surface of the protective layer of the polarizer laminate.
  • the polarizer stack may be made by any suitable method.
  • the polarizer and the resin film constituting the protective layer may be pasted together via any appropriate adhesive layer (adhesive layer or pressure-sensitive adhesive layer) Good.
  • the laminate is subjected to a dyeing and stretching treatment to make the PVA-based resin layer a polarizer
  • the laminate may be used as it is as a polarizer laminate. Or you may bond and use the resin film which comprises a protective layer on the polarizer surface of this laminated body.
  • the resin base material may or may not be peeled off.
  • An antireflective laminate is produced by forming an antireflective layer on a substrate.
  • the substrate may be subjected to surface treatment in advance, if necessary.
  • the surface treatment includes, for example, low pressure plasma treatment, ultraviolet radiation treatment, corona treatment, flame treatment, acid or alkali treatment.
  • an adhesive layer made of, for example, SiO x may be formed on the surface of the base material.
  • the antireflective layer is typically formed by a dry process (eg, sputtering) as described above.
  • the antireflective layer is an alternating multilayer laminate of a high refractive index layer and a low refractive index layer, for example, an Nb 2 O 5 film (high refractive index layer), an SiO 2 film (low refractive index)
  • the antireflection layer can be formed by sequentially forming the refractive index layer, the Nb 2 O 5 film (high refractive index layer), and the SiO 2 film (low refractive index layer).
  • a polarizer can be obtained.
  • the polarizing plate is not subjected to the formation process (dry process) of the antireflective layer. Therefore, since the polarizing plate is not exposed to high temperature, the moisture content of the polarizing plate can be maintained in the above-mentioned desired range.
  • the anti-reflection layer polarizing plate according to the embodiment of the present invention may be applied to an image display device.
  • the anti-reflection layer-attached polarizing plate can be disposed on the viewing side of the image display device such that the anti-reflection layer is on the viewing side.
  • a liquid crystal display device, an organic electroluminescent (EL) display device, and a quantum dot display device are mentioned as a representative example of an image display device.
  • the measurement sample was placed in an environment of 65 ° C. and 90% RH for 500 hours, and warpage (curling) was visually observed.
  • warpage curling
  • the case where the warpage is convex on the side opposite to the antireflective layer is regarded as “good”, and the case where the warpage is convex on the side of the antireflective layer is regarded as “poor”.
  • Example 1 Preparation of Polarizing Plate (Polarizer Laminate) As a resin substrate, an amorphous isophthalic acid copolymerized polyethylene terephthalate (IPA copolymerized PET) film (thickness: 100 ⁇ m) was used.
  • IPA copolymerized PET amorphous isophthalic acid copolymerized polyethylene terephthalate
  • One side of the substrate is subjected to corona treatment, and to this corona-treated side, polyvinyl alcohol (polymerization degree 4200, saponification degree 99.2 mol%) and acetoacetyl modified PVA (polymerization degree 1200, acetoacetyl modification degree 4.6)
  • a PVA-based resin layer was formed to prepare a laminate.
  • the obtained laminate was subjected to free-end uniaxial stretching 2.0 times in the longitudinal direction (longitudinal direction) between rolls with different circumferential speeds in an oven at 120 ° C. (air-assisted extension). Then, the laminate was immersed in an insolubilizing bath (aqueous solution of boric acid obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water) for 30 seconds (insolubilization treatment). Subsequently, it was immersed in a dyeing bath with a liquid temperature of 30 ° C. while adjusting the iodine concentration and immersion time so that the polarizing plate had a predetermined transmittance.
  • insolubilizing bath aqueous solution of boric acid obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water
  • iodine 0.2 parts by weight was mixed with 100 parts by weight of water, and it was immersed in an aqueous iodine solution obtained by mixing 1.5 parts by weight of potassium iodide for 60 seconds (staining treatment) . Then, it was immersed in a 30 ° C. crosslinking bath (a boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 100 parts by weight of water and 3 parts by weight of boric acid) for 30 seconds. (Crosslinking treatment). Thereafter, the laminate is immersed in a boric acid aqueous solution having a liquid temperature of 70 ° C.
  • an adhesive as shown below is applied so that the adhesive layer thickness after curing becomes 1.0 ⁇ m, and a methacrylic resin film (a protective layer is formed) thickness: irradiation 0.6g / m 2 / 24hr, bonded to having a glutarimide structure), warmed from the methacrylic resin film side 50 ° C. using an IR heater, ultraviolet following: 40 [mu] m, moisture permeability
  • the adhesive was then cured. Thereafter, the base material was peeled off from the PVA-based resin layer to obtain a polarizer laminate (polarizer having a constitution of polarizer / protective layer).
  • the thickness of the polarizer was 5 ⁇ m, and the single transmittance was 42.3%. Moreover, the moisture content of the obtained polarizing plate was 1.0 weight%.
  • Adhesive composition 40 parts by weight of N-hydroxyethyl acrylamide (HEAA), 60 parts by weight of acryloyl morpholine (ACMO), and 3 parts by weight of a photoinitiator "IRGACURE 819" (manufactured by BASF Corp.) The agent was prepared.
  • UV ultraviolet
  • active energy rays ultraviolet rays (gallium filled metal halide lamps, light irradiator: Light HAMMER 10 manufactured by Fusion UV Systems, Inc., bulbs: V bulbs, peak illuminance: 1600 mW / cm 2 , integrated dose 1000 / mJ / cm 2 (wavelength 380-440 nm) was used.
  • the illuminance of the ultraviolet light was measured using a Sola-Check system manufactured by Solatell.
  • An adhesion layer consisting of SiOx is formed by sputtering on the HC layer surface of the substrate by sputtering, and further, an Nb 2 O 5 film (high refractive index layer), SiO 2 film (low refractive index) on the adhesion layer Layer), an Nb 2 O 5 film (high refractive index layer), and a SiO 2 film (low refractive index layer) were sequentially formed to form an antireflective layer (total thickness of four layers: 200 nm).
  • the antifouling layer (thickness: 10 nm) which consists of an alkoxysilane compound which has perfluoropolyether group was formed on the anti-reflective layer, and the anti-reflective laminated body was produced.
  • the slow axis of the first retardation layer makes an angle of 0 ° with respect to the absorption axis of the polarizer
  • the slow axis of the second retardation layer makes an angle of 90 ° with the absorption axis of the polarizer. It was pasted together.
  • the HC-TAC film of the antireflective laminate is attached to the surface of the protective layer (methacrylic resin film) of the above-mentioned polarizer laminate via an acrylic adhesive (thickness: 20 ⁇ m) to obtain a polarized light with an antireflective layer. I got a board.
  • the obtained polarizing plate with an antireflection layer was subjected to the evaluations of the above (3) and (4). The results are shown in Table 1.
  • Example 2 A polarizing plate with an antireflection layer was produced in the same manner as in Example 1 except that the moisture content of the polarizing plate was 0.6% by weight. The obtained polarizing plate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 3 Except that the moisture permeability of the protective layer was 0.2g / m 2 / 24hr was produced an antireflection layer-attached polarizing plate in the same manner as in Example 1. The obtained polarizing plate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 4 A polarizing plate with an antireflection layer was produced in the same manner as in Example 3 except that the moisture content of the polarizing plate was changed to 0.6% by weight. The obtained polarizing plate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 5 A polarizing plate with an antireflection layer was produced in the same manner as in Example 1 except that the moisture content of the polarizing plate was changed to 2.0% by weight. The obtained polarizing plate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 1 The HC-TAC film used in Example 1 was attached to the surface of the protective layer of the same polarizer laminate as in Example 2 via an acrylic pressure-sensitive adhesive (thickness: 20 ⁇ m).
  • An antireflective layer (including an adhesive layer and an antifouling layer) was formed on the surface of the HC-TAC film of the obtained laminate in the same manner as in Example 1.
  • the first retardation layer and the second retardation layer were bonded to the surface of the polarizer. That is, the polarizing plate with an antireflection layer was produced using the procedure of using the laminated body containing a polarizing plate for an antireflection layer formation process.
  • the obtained polarizing plate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • the polarizing plate with an antireflection layer of the present invention is suitably used for an image display device such as a liquid crystal display device, an organic EL display device, and a quantum dot display device.
  • Polarizer 11 Polarizer 12 Protective Layer 20 Substrate 30 Antireflection Layer 100 Polarizer with Antireflection Layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Polarising Elements (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une plaque de polarisation dotée d'une couche antireflet, qui a un petit changement de dimension même dans des environnements de forte humidité et de forte température et est ainsi supprimée lors d'un gauchissement. Conformément à la présente invention une plaque de polarisation dotée d'une couche antireflet comprend : une plaque de polarisation qui a un polariseur et une couche de protection qui est disposée sur une surface du polariseur ; un matériau de base qui est lié à la couche de protection ; et une couche antireflet qui est directement formée sur le matériau de base. Dans des modes de réalisation de la présente invention, le pourcentage d'humidité de la plaque de polarisation est de 0,5 % en poids ou plus. Dans un mode de réalisation de la présente invention, la perméabilité à la vapeur d'eau de la couche protectrice est de 1,0 g/m2/24 hr ou moins.
PCT/JP2018/040572 2017-11-06 2018-10-31 Plaque de polarisation dotée d'une couche antireflet et son procédé de production Ceased WO2019088192A1 (fr)

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CN202511488159.7A CN121165238A (zh) 2017-11-06 2018-10-31 带防反射层的偏振片及其制造方法
CN201880071645.0A CN111295605A (zh) 2017-11-06 2018-10-31 带防反射层的偏振片及其制造方法
KR1020207007898A KR102405568B1 (ko) 2017-11-06 2018-10-31 반사 방지층 부착 편광판 및 그 제조 방법

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CN110989066B (zh) * 2019-12-20 2022-01-11 京东方科技集团股份有限公司 偏光片、其制作方法及显示装置
KR20210095553A (ko) * 2020-01-23 2021-08-02 스미또모 가가꾸 가부시키가이샤 광학 적층체, 접합층 부착 광학 적층체, 및 그의 제조 방법
JP7089610B2 (ja) 2020-03-04 2022-06-22 デクセリアルズ株式会社 光学積層体の製造方法
EP4116083A4 (fr) 2020-03-04 2024-06-19 Dexerials Corporation Stratifié optique, article, et procédé de production de stratifié optique
JP7633782B2 (ja) * 2020-09-03 2025-02-20 日東電工株式会社 位相差層付偏光板の製造方法
WO2022054827A1 (fr) 2020-09-10 2022-03-17 デクセリアルズ株式会社 Stratifié optique, article et procédé de production de stratifié optique
JP7628010B2 (ja) * 2020-10-15 2025-02-07 日東電工株式会社 反射防止層付き偏光板および画像表示装置
WO2022102647A1 (fr) * 2020-11-16 2022-05-19 日東電工株式会社 Écran d'affichage d'image
JP7234309B2 (ja) * 2021-07-29 2023-03-07 日東電工株式会社 光学積層体

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JP6999370B2 (ja) 2022-01-18
JP2019086605A (ja) 2019-06-06
CN111295605A (zh) 2020-06-16
TWI785140B (zh) 2022-12-01

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