WO2020091065A1 - Procédé de découpe laser et d'usinage pour un stratifié de film optiquement fonctionnel polarisant - Google Patents

Procédé de découpe laser et d'usinage pour un stratifié de film optiquement fonctionnel polarisant Download PDF

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Publication number
WO2020091065A1
WO2020091065A1 PCT/JP2019/043124 JP2019043124W WO2020091065A1 WO 2020091065 A1 WO2020091065 A1 WO 2020091065A1 JP 2019043124 W JP2019043124 W JP 2019043124W WO 2020091065 A1 WO2020091065 A1 WO 2020091065A1
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Prior art keywords
laser
film
polarizing
sheet material
polarizer
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PCT/JP2019/043124
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English (en)
Japanese (ja)
Inventor
直之 松尾
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日東電工株式会社
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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 CN201980071904.4A priority Critical patent/CN112969939B/zh
Priority to JP2020554989A priority patent/JP7316297B2/ja
Priority to KR1020217013601A priority patent/KR102433467B1/ko
Publication of WO2020091065A1 publication Critical patent/WO2020091065A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • 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 laser cutting method for a polarizing optical functional film laminate. More specifically, the polarizing optical functional film laminate having at least a polarizing film having a protective film laminated on at least one side of the polarizer is not limited to a rectangular shape, and may have a desired shape such as a curved edge or a hole. As has, relates to a method of laser cutting.
  • the polarizing optical functional film laminate subjected to laser cutting or a polarizing film which is a part thereof is then mounted on an optical display device such as a liquid crystal display device or an organic EL display device, or a plasma display panel (PDP). ) Etc., and can be used by being stuck to an optical display panel.
  • an optical display device such as a liquid crystal display device or an organic EL display device, or a plasma display panel (PDP).
  • PDP plasma display panel
  • the image display device equipped with a polarizing film has a wide variety of uses, and therefore, it is often used for a long time in a high temperature and high humidity environment.
  • a phenomenon occurs in which water flows in and out from the cut end surface of the polarizing film that has been exposed to water.
  • a polarizer is of a type in which a stretched film made of a PVA-based resin material is impregnated with iodine to form a PVA-polyiodine ion complex so as to exhibit polarization performance.
  • Patent Document 2 a method has been proposed in which the outer peripheral cut surface of a polarizing film cut into a desired shape is covered with a resin coating (Patent Document 2), but the method proposed in Patent Document 2 is proposed. Then, in order to form a film, it is necessary to apply a solution in which a resin is dissolved in a solvent to a cut surface of a polarizing film with a roll coater or the like, and to dry the manufacturing process, resulting in a long and complicated manufacturing process.
  • Patent Document 3 Another problem that results in an increase in Further, in Patent Document 3, a protective layer disposed on both front and back surfaces of the polarizer is formed to be larger than the polarizer so that a groove-shaped gap is provided between the protective layers and the gap is filled with a sealing material.
  • the manufacturing process is long and complicated.
  • a coating is formed using a universal coating means such as a roll coater or a slot die coater on the cut end surface of the polarizing film whose outer periphery is cut into a non-linear shape including a curved line
  • a universal coating means such as a roll coater or a slot die coater
  • the gap between the liquid discharge part and the cut end face of the polarizing film needs to be kept uniform, but such gap adjustment is extremely difficult, and it is difficult to form a coating film with a uniform thickness on the cut end face. ..
  • a spray coater for forming the resin film, but in this method, a solution in which a resin material is dissolved in an organic solvent is used as a coating liquid, and in this case, a multi-layer structure is used.
  • the coating liquid penetrates between the layers of the polarizing film, and the coating liquid that has penetrated between the layers causes a problem that the interlayer adhesive force is reduced. Further, this method may cause a problem that the constituent substrate of the polarizing film is eroded by the diluting organic solvent contained in the coating liquid.
  • the optical film generally has a surface protective film and a release liner which are peeled off at the time of mounting on a device on one side or both sides, and Patent Document 2 is provided at the cutting end of the optical film having such a constitution.
  • Patent Document 2 is provided at the cutting end of the optical film having such a constitution.
  • the cut end faces of the surface protective film and the release liner and the cut end face of the optical film are:
  • the coating that covers the cut ends makes them fixed to each other, making it difficult to peel off the surface protective film and the release liner. Further, if the surface protective film and the release liner are forcibly peeled off, a problem arises that the coating film formed on the cut end portion falls off from the optical film. Further, there arises a problem that a part of the film that has fallen off causes contamination of foreign matter in the manufacturing process.
  • Vapor deposition Vapor deposition, CVD (Chemical Vapor Deposition), and other so-called vacuum dry coating methods may be applied, but vapor deposition is mainly aimed at forming a metal component film, and in principle it is difficult to form an organic film.
  • CVD it is possible to enclose an organic monomer in a reaction furnace and form a film by a plasma CVD method or the like, but it takes too much time to form a film having a thickness of 100 nm or more, and thus the productivity is low. , Is difficult to apply in reality.
  • Patent Document 4 teaches that a protective film, which is originally formed of a material having low moisture permeability, is melted by the heat at the time of cutting, and the laser cut end surface of the polarizer is covered with the melt. Patent Document 4 states that according to this method, it is possible to improve the reliability of the processed end portion of the polarizing film in a high temperature and high humidity environment. According to this method, since the coating layer can be formed simultaneously with the laser cutting process, the outer peripheral coating step after the shape processing can be omitted.
  • an optical laminate roll is prepared by winding a long optical laminate comprising a long optical film and protective sheets laminated on both sides of the optical film into a roll, and from this roll, A method has also been proposed in which the optical laminate is subjected to laser cutting processing while being fed out (Patent Document 5).
  • Patent Document 5 among the protective sheets laminated on both sides of the optical film, the protective sheet located on the lower side can be made to function as the transport base material. In this case, it can be understood that the lower protective sheet is half-cut by laser irradiation.
  • Patent Document 4 teaches that the protective film of the polarizer is formed of a resin material having a predetermined low water vapor transmission rate. However, even if such a material is used, when the polarizing film is laser cut, There is no guarantee that the resulting melt from the protective film will be quantitatively sufficient to form a coating covering the cut end surface of the polarizer, and a coating with a thickness sufficient to prevent the permeation of water from the cut end surface should be provided. It is difficult to form. As described above, with the above-mentioned methods that have been conventionally proposed, it is not possible to obtain a polarizing film that can satisfy the recent strict quality requirements for "depolarization" due to color loss from the cut end face of the polarizer.
  • a polarizing film having at least a polarizing film having a protective film laminated on at least one side of a polarizer In the polarizing optical functional film laminate, a sheet material that is separate from the polarizing optical functional film laminate is placed on one surface of the polarizing optical functional film laminate, and the polarizing optical functional film is formed. A laser is irradiated in the thickness direction of the polarizing optical functional film laminate from the other surface located on the side opposite to the sheet material of the laminate, and the irradiation position of the laser is along a predetermined shape in the plane of the laminate.
  • the polarizing optical functional film laminate By cutting the polarizing optical functional film laminate into a predetermined shape by performing a laser cutting treatment for moving, a part in the thickness direction is obtained under the laser irradiation.
  • the existing sheet material component is sprayed as a droplet by laser energy, and at least a part of the droplet of the sheet material component is deposited on the laser cut end face formed on the polarizer of the polarizing optical functional film laminate.
  • a coating layer containing at least the components of the sheet material is formed so as to cover the laser cut end face of the polarizer, and by utilizing this phenomenon, the cut end face of the polarizing film transmits moisture.
  • the inventors have come to the idea of forming a protective film that suppresses the above.
  • the coating film thus formed can enhance the function of protecting the cut end face of the polarizing film in a high temperature and high humidity environment and improve the reliability of the polarizing film.
  • the present invention provides a cutting method for laser cutting a polarizing optical functional film laminate including a polarizing film having a protective film laminated on at least one side of a polarizer as a minimum constituent element.
  • a laser cutting method for a polarizing film according to an aspect of the present invention is a laser cutting method for laser cutting a polarizing optical functional film laminate having at least a polarizing film having a protective film laminated on at least one side of a polarizer.
  • a sheet material that is a separate body from the polarizing optical functional film laminate is placed on one surface of the polarizing optical functional film laminate to be arranged, and with the sheet material of the polarizing optical functional film laminate.
  • the polarizing optical functional film laminate is cut into the predetermined shape, and the sheet material has a thickness direction under laser irradiation.
  • a sheet material component present in a part of the sheet material is dispersed as a droplet by laser energy and scattered, and at least a part of the droplet of the sheet material component is formed on the polarizer of the polarizing optical functional film laminate.
  • a coating layer containing at least the components of the sheet material is formed so as to be deposited on the cut end face so as to cover the laser cut end face of the polarizer.
  • a coating layer that contributes to reliability improvement in a high temperature and high humidity environment can be formed on the cut end surface of the polarizing film. It will be possible.
  • FIG. 1 is a schematic cross-sectional view showing an example of a polarizing optical functional film laminate that can be used in a laser cutting method according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing an example of a state when the polarizing optical functional film laminate of FIG. 1 is cut into a desired shape by laser irradiation.
  • the schematic diagram of the laminated body cross section which showed the state of the laminated body with a sheet material during the cutting process by laser irradiation.
  • FIG. 4 is an optical microscope image showing depolarization of a cut end face in a direction perpendicular to a light absorption axis of a polarizer under crossed Nicols transmission illumination, showing an example in which depolarization due to color loss does not occur.
  • FIG. 1 is a schematic cross-sectional view showing an example of a state when the polarizing optical functional film laminate of FIG. 1 is cut into a desired shape by laser irradiation.
  • FIG. 6 is an optical microscope image showing depolarization of a cut end face in a direction perpendicular to a light absorption axis of a polarizer under crossed Nicol transmitted illumination, showing an example in which depolarization due to color loss occurs.
  • FIG. 8 is a cross-sectional SEM image showing an enlarged cut end portion of a polarizer in the image shown in FIG. 7.
  • EDX image of the same location as in FIG. 9. Schematic of the laser shape processing apparatus which laser-cuts a long strip-shaped polarizing optical functional film laminated body by a roll-to-roll system. It is a figure which shows the example of a cutting processing layout at the time of manufacturing the product cut out in the smart phone shape from the large-sized polarizing film, and is a top view which shows the whole.
  • FIG. 1 It is a figure which shows the example of a cutting process layout at the time of manufacturing the product cut out in the smart phone shape from the large-sized polarizing film, and is a top view which expands and shows a part. It is a figure which shows the example of a cutting processing layout at the time of manufacturing the product cut out in the automobile meter panel shape from the large-sized polarizing film, and is a top view which shows the whole. It is a figure which shows the example of a cutting processing layout at the time of manufacturing the product cut out in the automobile meter panel shape from the large-sized polarizing film, and is a top view which expands and shows a part.
  • Example 1 the SEM image which observed the cut end surface from the molecular orientation direction.
  • Example 2 the SEM image which observed the cut end surface from the molecular orientation direction.
  • Compare example 1 the SEM image which observed the cut end surface from the molecular orientation direction.
  • 3 is an image showing the analysis result by TOF-SIMS in Example 1.
  • FIG. 5 is a diagram showing the elemental analysis result of the coating layer formed on the cut end surface in Example 1.
  • 8 is an image showing the analysis result by TOF-SIMS in Example 6.
  • FIG 9 is an image showing the analysis result by TOF-SIMS in Example 7.
  • FIG. 1 is a schematic sectional view showing an example of a polarizing optical functional film laminate that can be used in the laser cutting method according to the embodiment of the present invention.
  • the polarizing optical functional film laminate 1 includes at least the polarizing film 12, and further includes, but is not limited to, the surface treatment layer 13, the surface protective film 14, and the pollution control film 23 as optional elements. Can be included.
  • a release liner 16 may be further attached to the polarizing optical functional film laminate 1 via the pressure-sensitive adhesive layer 15.
  • the polarizing optical functional film laminate 1 provided with the pressure-sensitive adhesive layer 15 and the release liner 16 is indicated by reference numeral "1A", and the polarizing optical functional film laminate 1A will be described as an example.
  • the polarizing film 12 is mainly composed of a polarizer 10 and a protective film 11 laminated on one or both main surfaces of the polarizer 10, as shown in FIG.
  • Other optical functional films exhibiting optical functions such as a brightness enhancement film and a viewing angle compensation film may be further laminated.
  • the laminate including these optical functional films constitutes the polarizing film 12.
  • FIG. 1 shows an example in which the protective films 11a and 11b are laminated on both main surfaces of the polarizer 10, the protective film 11 may be laminated only on one main surface.
  • the polarizer 10 is made of a resin film. Any appropriate resin can be used as this resin film, but a polyvinyl alcohol-based resin (hereinafter, referred to as PVA-based resin) is usually used.
  • PVA-based resin examples include polyvinyl alcohol and ethylene-vinyl alcohol copolymer.
  • the ethylene-vinyl alcohol copolymer can be obtained by saponifying an ethylene-vinyl acetate copolymer.
  • the degree of saponification of the PVA-based resin is usually 85 mol% to 100 mol%, preferably 95.0 mol% or more, more preferably 99.0 mol% or more, and particularly preferably 99.93 mol% or more. ..
  • the degree of saponification can be determined according to JIS K 6726-1994. By using the PVA-based resin having such a saponification degree, the polarizer 10 having excellent durability can be obtained.
  • the PVA-based resin constituting the polarizer 10 may be subjected to various treatments such as swelling treatment, stretching treatment, dichroic substance, typically dyeing treatment with iodine, crosslinking treatment, washing treatment, and drying treatment, according to a commonly used method. It is applied and is ready for use as a polarizer. The number, order, time, etc. of each processing can be set appropriately.
  • the PVA-based resin may be a thin film formed as a coating layer on another base material, and may be formed by subjecting the thin film to the above-mentioned treatments.
  • the stretching direction in the stretching treatment corresponds to the absorption axis direction of the obtained polarizer. From the viewpoint of obtaining excellent polarization characteristics, the PVA-based resin is usually uniaxially stretched 3 to 7 times.
  • the PVA-based resin film a film formed by an arbitrary method such as a casting method of casting a stock solution dissolved in water or an organic solvent to form a film, a casting method, an extrusion method, or the like can be appropriately used.
  • the average degree of polymerization of the PVA resin can be appropriately selected according to the purpose.
  • the average degree of polymerization is usually 1000 to 10000, preferably 1200 to 6000, and more preferably 2000 to 5000.
  • the average degree of polymerization can be determined according to JIS K 6726-1994.
  • the resin film forming the polarizer 10 is typically impregnated with a dichroic substance.
  • the dichroic substance include iodine and organic dyes. These can be used alone or in combination of two or more. Iodine is preferably used as the dichroic substance.
  • organic dyes examples include Red BR, Red LR, Red R, Pink LB, Rubin BL, Bordeaux GS, Sky Blue LG, Lemon Yellow, Blue BR, Blue 2R, Navy RY, Green LG, Violet LB, Violet B, Black. H, Black B, Black GSP, Yellow 3G, Yellow R, Orange LR, Orange 3R, Scarlet GL, Scarlet KGL, Congo Red, Brilliant Violet BK, Supra Blue G, Supra Blue GL, Supra Orange GL, Direct Sky Blue, Direct First orange S, first black, etc. can be used. These dichroic substances may be used alone or in combination of two or more.
  • the thickness of the polarizer 10 can be set to any appropriate value.
  • the thickness of a practically used polarizer is 5 ⁇ m to 30 ⁇ m.
  • the polarizer 10 preferably has a characteristic of exhibiting absorption dichroism in the wavelength range of 380 nm to 780 nm.
  • the single transmittance (Ts) of the polarizer 10 is generally 43% or more. The theoretical upper limit of the single transmittance is 50%, and the practical upper limit is 46%. Further, the single transmittance (Ts) is a Y value measured by a 2 degree visual field (C light source) based on JIS Z8701 and subjected to luminosity correction. For example, a spectrophotometer (J7, V7100) is used. Can be used to measure.
  • the polarization degree of the polarizer 10 is generally 99.9% or more.
  • Examples of materials for forming the protective films 11a and 11b include cellulosic resins such as diacetyl cellulose and triacetyl cellulose (TAC), (meth) acrylic resins, cycloolefin resins, olefin resins such as polypropylene, and polyethylene terephthalate. Examples thereof include ester-based resins such as resin-based resins, polyamide-based resins, polycarbonate-based resins, and copolymer resins of these.
  • the expression “(meth) acrylic resin” means an acrylic resin and / or a methacrylic resin.
  • the thickness of the protective films 11a and 11b is usually selected to be an arbitrary value within the range of 10 ⁇ m to 200 ⁇ m. The materials, thicknesses and the like may be the same or different between the protective film 11a and the protective film 11b.
  • Each of the protective films 11a and 11b is typically laminated on each of the main surfaces of the polarizer 10 via an adhesive layer (not shown).
  • Any appropriate adhesive can be used as the adhesive forming the adhesive layer.
  • a water-based adhesive, a solvent-based adhesive, an active energy ray-curable adhesive, etc. are used.
  • As the water-based adhesive it is preferable to use an adhesive containing a PVA-based resin.
  • the protective films 11a and 11b may contain one or more kinds of appropriate additives. Examples of the additive include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a release agent, a coloring inhibitor, a flame retardant, a nucleating agent, an antistatic agent, a pigment and a coloring agent.
  • FIG. 1 shows an example in which the surface treatment layer 13 is formed only on the protective film 11 a laminated on one main surface of the polarizer 10.
  • the surface protective film 14 is a member that is releasably attached to the protective film 11a for the purpose of protecting the protective film 11a from scratches caused by contact or adhesion of foreign matter, and is composed of an adhesive layer 14a and a resin film 14b.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 14a a material containing a polymer material of any one of acryl-based, rubber-based, urethane-based, silicone-based, and polyester-based as a main component is used, and the thickness is in the range of 1 to 100 ⁇ m. It can be appropriately selected.
  • the resin film 14b examples include acrylic resins, olefin resins such as polyethylene and polypropylene, ester resins such as polyethylene terephthalate resin, and the like, and the thickness is preferably in the range of 5 ⁇ m to 100 ⁇ m.
  • the surface protection film 14 is peeled off when the polarizing film is mounted on an optical display device. Therefore, the pressure-sensitive adhesive that constitutes the pressure-sensitive adhesive layer 14a preferably has a light pressure-sensitive adhesive force, and a preferable peeling force is 5 N / 20 mm or less.
  • the release liner 16 is laminated on the surface of the polarizing film 12 on the side opposite to the surface protective film 14, that is, on the surface of the protective film 11b on the side opposite to the polarizer 10, with the adhesive layer 15 interposed therebetween.
  • the main surface of the release liner 16 in contact with the pressure-sensitive adhesive layer 15 is subjected to a mold release treatment in order to obtain good release properties.
  • the release liner 16 covers the adhesive layer 15 until the polarizing film 12 is attached to the optical display panel.
  • the release liner 16 is peeled off from the protective film 11b leaving the pressure-sensitive adhesive layer 15 on the side of the polarization film 12 when the polarization film 12 is bonded to the optical display panel. It is attached to the optical display panel via.
  • the peeling force of the release liner 16 with respect to the adhesive layer 15 is preferably 5 N / 20 mm or less.
  • the release liner 16 is preferably composed of a resin film, and for example, an olefin resin such as polyethylene and polypropylene or an ester resin such as polyethylene terephthalate resin can be used, but the release liner 16 is not limited thereto.
  • the thickness of the release liner 16 can be appropriately selected within the range of 1 ⁇ m to 100 ⁇ m.
  • the release liner 16 is preferably formed of a material having low moisture permeability, and a preferable value of the moisture permeability of the material of the release liner 16 is 200 g / in a temperature of 40 ° C. and a humidity of 90% RH. m 2 ⁇ 24h or less, more preferably 150 g / m 2 ⁇ 24h or less.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 15 it is possible to use a pressure-sensitive adhesive mainly containing any polymer material selected from the group consisting of acrylic, rubber-based, urethane-based, silicone-based, olefin-based, and polyester-based. it can. From the viewpoint of cost reduction, acrylic or rubber adhesives are preferable.
  • the thickness of the pressure-sensitive adhesive layer 15 can be appropriately set within the range of 1 ⁇ m to 50 ⁇ m.
  • the pollution control film 23 may be provided on the surface protection film 14.
  • the pollution control film 23 includes at least a resin film base material 23a made of a resin material, and further includes an adhesive layer 23b arranged on one surface of the resin film base material 23a.
  • the resin film substrate 23a is laminated on the surface protection film 14 via the adhesive layer 23b.
  • a general resin film can be used as the resin film 23a, and for example, an acrylic resin, an olefin resin such as polyethylene and polypropylene, or an ester resin such as polyethylene terephthalate resin can be used.
  • the resin film 23a preferably has a thickness in the range of 20 ⁇ m to 100 ⁇ m.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 23b a material containing any of acrylic, rubber-based, urethane-based, silicone-based, and polyester-based polymer materials as a main component can be used.
  • the thickness of the layer 23b can be appropriately selected within the range of 1 to 100 ⁇ m.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 23b preferably has a light pressure-sensitive adhesive force to the surface protection film 14, and the pressure-sensitive adhesive force is equal to or smaller than the pressure-sensitive adhesive force of the surface protection film 14 used.
  • the adhesive strength of the pressure-sensitive adhesive is larger than the adhesive strength of the surface protective film 14, the surface protective film 14 may be peeled off when the anti-contamination film 23 is peeled off, which is not preferable.
  • the polarizing optical functional film laminate 1A is cut into a desired shape by laser cutting before the polarizing film 12 is attached to the optical display panel via the adhesive layer 15.
  • the melt, fine particles, or the like generated during the laser cutting process may be scattered and scattered, and the scattered components may contaminate the surface layer on the main surface of the polarizing film on the laser incident surface side.
  • this pollution can be prevented or suppressed.
  • the layer or film located on the most front side in the laser irradiation direction, in the example of FIG. 1, the cut end surface of the resin film 14b forming the surface protection film 14. May have a burr “A” (see FIG. 5) in a state of protruding to the outside of the polarizing optical functional film laminate 1A.
  • a burr can be polarized. It is possible to suppress the thickness to 0 to 20 ⁇ m in the laminating direction of the optical function film laminate 1A.
  • FIG. 2 shows an example of a state in which the polarizing optical functional film laminate 1A of FIG. 1 is cut into a desired shape by laser irradiation by the same method as in FIG.
  • a laser By using a laser, not only the polarizing optical function film laminated body 1A can be easily cut into a predetermined shape, but also the polarized light contained in the polarizing optical function film laminated body 1A is accompanied by this cutting process.
  • a coating layer can be formed on the cut end surface of the child 10.
  • the surface of the polarizing film 12 facing the main surface on the side opposite to the laser incident surface is located outside the release liner 16 of the polarizing optical functional film laminate 1A in the present embodiment, for example.
  • the sheet material 17 is arranged so as to face 16a.
  • the polarizing optical functional film laminate 1A in which the sheet material 17 is arranged is referred to as a "laminate with a sheet material", and the whole is indicated by reference numeral "2".
  • the sheet material 17 includes at least a resin film base material 17a made of a resin material, and further includes a pressure-sensitive adhesive layer 17b arranged on one surface of the resin film base material 17a.
  • the resin film substrate 17a is releasably attached to the release liner 16 via the pressure-sensitive adhesive layer 17b, and is peeled from the release liner 16 after the cutting process.
  • a general resin film can be used, and for example, an acrylic resin, an olefin resin such as polyethylene and polypropylene, or an ester resin such as polyethylene terephthalate resin is used. can do.
  • the resin film substrate 17a preferably has a thickness in the range of 5 ⁇ m to 200 ⁇ m.
  • the resin film base material 17a is formed of a material having low moisture permeability, and a preferable value of the moisture permeability of the material of the resin film base material 17a is under an atmosphere of a temperature of 40 ° C. and a humidity of 90% RH. And 200 g / m 2 ⁇ 24h or less, and more preferably 150 g / m 2 ⁇ 24h or less.
  • the pressure-sensitive adhesive layer 17b is formed of a polymer material containing acrylic, urethane, silicone, rubber or polyester as a main component. Further, the pressure-sensitive adhesive layer 17b is preferably made of a pressure-sensitive adhesive having a light peeling pressure-sensitive adhesive force, and the peeling force of the pressure-sensitive adhesive layer 17b is the peeling force of the release liner 16 of the polarizing optical functional film laminate 1A. Is preferably equal to or smaller than. When the peeling force of the pressure-sensitive adhesive layer 17b of the sheet material 17 is larger than the peeling force of the release liner 16, the release liner 16 is also peeled off when the sheet material 17 is peeled after the laser cutting process. This may occur. The adhesive layer 17b is usually removed together with the resin film substrate 17a when the sheet material 17 is peeled off after the laser cutting process step.
  • the laser is applied from the other surface of the polarizing optical functional film laminated body 1A located on the opposite side of the sheet material 17, to the surface on the side of the pollution control film 23 in the illustrated embodiment. Is irradiated in the thickness direction of the polarizing optical functional film laminate 1A.
  • This “thickness direction” is sufficient as long as it is a direction that penetrates the layers constituting the polarizing optical functional film laminate 1 ⁇ / b> A, and is not necessarily a direction orthogonal to those layers.
  • This cutting with a laser may be performed in a state where the polarizing optical functional film laminate 1A is singulated into a single plate state, but from the viewpoint of efficient production, as described in detail later, It is preferably carried out in the form of a strip film. Therefore, it is preferable that the laminate with sheet material 2 is formed in the form of a long strip film wound in a roll.
  • FIG. 3 shows the state of the laminated body 2 with a sheet material during the cutting process by laser irradiation in a schematic view of the laminated body cross section.
  • the cutting groove 2a is formed in the polarizing optical functional film laminate 1A of the laminate 2 with the sheet material over the entire thickness thereof including the release liner 16. Therefore, by moving the laser irradiation position along the predetermined shape within the plane of the polarizing optical functional film laminate 1A, the polarizing optical functional film laminate 1A can be cut into a desired shape.
  • the cutting is performed by completely cutting the polarizing optical functional film laminate 1A forming the laminated body 2 with a sheet material in the thickness direction, and further cutting to a depth where a part of the sheet material is left.
  • the laser cutting process be performed in a state where the laminated body 2 with a sheet material is placed on the suction type fixed stage 19 and held by suction force as shown in FIG.
  • the cutting end face of the polarizing film 12 and especially the cutting end face of the polarizer 10 are covered with the coating layer 18a. , 18b can be formed.
  • the "depolarization width" described below is reduced, in other words, it is possible to improve reliability in a high temperature and high humidity environment.
  • FIG. 4A shows an example of a polarizing film in which depolarization due to color loss has not occurred
  • FIG. 4B shows an example of a polarizing film in which depolarization has occurred by performing a reliability test in a high temperature and high humidity environment. ..
  • the cut edge of the polarizing film 12 is indicated by reference numeral 12a, and color loss occurs in the region from the cut edge 12a to the width 12b.
  • the width 12b of this region is the depolarization width.
  • the protective films 11a and 11b constituting the polarizing film 12 and other adhesives (not shown) for adhering the polarizer 10 and the protective films 11a and 11b to each other generally have an infrared laser energy of a threshold value or more. It is made of a resin material that has the property of softening or melting. Therefore, at least the protective films 11a, 11b and the like adjacent to the cutting groove 2a can be melted by the thermal energy of the laser during the laser cutting process to form a melt. For the sake of convenience, FIG. 3 shows only the melt formed by the protective film 11a and the adhesive attached thereto.
  • the melt contains a large amount of the components of the protective films 11a and 11b, and the melt flows along the laser cut end face of the polarizer 10 exposed by the cutting process to cover a part or all of the cut end face.
  • Form layer 18a is formed on the cut end surface of the polarizing film 12, especially the cut end surface of the polarizer 10. Therefore, it is possible to improve reliability in a high temperature and high humidity environment.
  • the region affected by the thermal energy of the laser and formed along the surface of the protective film 11 is preferably 200 ⁇ m or less from the cut end face, more preferably 100 ⁇ m or less, and particularly preferably 50 ⁇ m or less. This is because if the thickness exceeds 200 ⁇ m, the fused region may be projected from the frame portion of the display panel in a state where the polarizing film 12 is bonded to the display panel, and the appearance quality may be deteriorated.
  • a coating layer 18b containing at least the components of the sheet material 17, in some cases, the components of the pressure-sensitive adhesive layer 15 and the release liner 16, and further other components is formed, and the moisture blocking of the coating layer 18b formed is performed.
  • a desired effect can be expected depending on the property (hydrophobicity or moisture permeability).
  • the moisture barrier property (hydrophobicity or moisture permeability) of the formed coating layer even in the same thickness, a high temperature and high humidity environment can be obtained.
  • a predetermined effect of blocking infiltration can be expected. Therefore, according to the present embodiment, in the shape processing of the polarizing optical functional film laminate 1A, at the same time as the laser cutting processing, in addition to the coating layer 18a, on the cutting end surface of the polarizing film 12, especially the cutting end surface of the polarizer 10.
  • the coating layer 18b can be formed, and the reliability can be improved in a high temperature and high humidity environment.
  • the width of the cutting groove 2a formed on the sheet material 17 is appropriately determined in the range of 5 ⁇ m to 300 ⁇ m, and the depth of the cutting groove 2a is 5 ⁇ m to 200 ⁇ m. It is preferable to appropriately determine in the range.
  • the thickness of the coating layer 18b formed on the cut end surface of the polarizing film 12, more specifically, the length in the direction orthogonal to the cut end surface of the polarizing film 12 is preferably 10 ⁇ m or less. If the thickness of the coating layer 18b exceeds 10 ⁇ m, the dimensional accuracy of the product may be affected, and a defect may occur when the coating layer 18b is mounted on the target display panel, and peeling occurs when the coating layer 18b is mounted on the display panel. This is because it is unfavorable because it may affect the releasability of the surface protective film. ..
  • the pressure-sensitive adhesive layer 17b of the sheet material 17 constitute a part or all of the components of the coating layer 18b formed on the cut end surface of the polarizing film 12
  • the pressure-sensitive adhesive layer 17b of The thickness is preferably in the range of 1 ⁇ m to 100 ⁇ m, more preferably in the range of 5 ⁇ m to 50 ⁇ m.
  • the thickness of the pressure-sensitive adhesive layer 17b is less than 1 ⁇ m, a sufficient pressure-sensitive adhesive force cannot be obtained, and peeling may occur during transportation, and when the thickness of the pressure-sensitive adhesive layer 17b is more than 100 ⁇ m, the sheet This is because the total thickness of the laminated body with material 2 becomes too thick and the handling property deteriorates.
  • the adhesive layer 17b is made of a silicone-based or rubber-based one having hydrophobicity as a main component. It is particularly preferable that it has an alkyl group such as a methyl group or an ethyl group, or a hydrophobic group such as a phenyl group.
  • the pressure-sensitive adhesive layer 17b is preferably formed of a material having low moisture permeability, and a preferable value of the moisture permeability of the material of the pressure-sensitive adhesive layer 17b is under an atmosphere of a temperature of 40 ° C. and a humidity of 90% RH.
  • the components of the adhesive layer 17b are the same as those described above. It is not limited. Further, when the laser penetrates the pressure-sensitive adhesive layer 17b of the sheet material 17 and reaches the resin film base material 17a, the component of the resin film base material 17a as well as the component of the pressure-sensitive adhesive layer 17b is cut into the polarizing film 12. Since it constitutes a part of the components of the coating layer 18b formed on the end surface, the thickness of the resin film substrate 17a is 10 ⁇ m to 150 ⁇ m from this viewpoint and from the viewpoint of preventing damage during handling. Is preferred.
  • the coating layer 18a contains a large amount of the melt of the protective films 11a and 11b.
  • a pressure-sensitive adhesive having components other than the polarizing optical functional film laminate 1 and 1A, at least the component of the sheet material 17 being components other than the polarizing optical functional film laminate 1 It is believed that the components of layer 15 and release liner 16 are rich.
  • the coating layer 18a and the coating layer 18b can theoretically be relatively clearly distinguished as shown in the schematic view of FIG. 3, it is practically difficult to clearly distinguish them. Is.
  • both the coating layer 18a and the coating layer 18b respectively, at least the components of the protective film 11a, 11b and the component that is melted and scattered from the sheet material 17, Furthermore, the release liner 16 and the adhesive layer 15 and the like contain components that are melted and scattered. In other words, the components of the coating layer 18a and the coating layer 18b are in a mixed or mixed state, so that the components of the coating layer 18a and the coating layer 18b cannot be clearly distinguished, and it is necessary to do so. Absent.
  • FIG. 3 merely shows a conceptual diagram for facilitating the explanation.
  • the components contained in the coating layers 18a and 18b were analyzed by TOF-SIMS (time-of-flight secondary ion mass spectrometry) or energy dispersive X-ray analysis. Are analyzed by.
  • FIG. 5 shows an SEM image of a cut cross section of the laminated body 2 with a sheet material as an example, which is laser cut.
  • FIGS. 6A and 6B the effect obtained by the laminated body 2 with a sheet material is shown by “depolarization width” in comparison with the effect obtained by the end mill according to the related art.
  • FIG. 6A shows an example of a depolarization width achieved by Example 4 described later
  • FIG. 6B shows an example of a depolarization width achieved by Comparative Example 3 described later.
  • the coating layer (18a) was melted and scattered from the release liner 16 and the sheet material 17. It is believed that the ingredients are included.
  • the coating layer (18a) contributes to the improvement of the quality reliability of the cut end surface of the polarizer 10 in a high temperature and high humidity environment.
  • the pressure-sensitive adhesive layer 15 is not always necessary, and even when the pressure-sensitive adhesive layer 15 is provided, the pressure-sensitive adhesive for the laser used is Depending on the thermal characteristics such as reactivity and fluidity during heating, the coating layer (18a) may not include the components of the melt from the adhesive layer 15. However, the components of the coating layer 18a and the components of the coating layer 18b are in a mixed or mixed state. Therefore, even in such a case, the quality reliability of the cut end face of the polarizer 10 can be improved. ..
  • FIG. 7 is a cross-sectional SEM image in the vicinity of a polarizing film of a laminate with a sheet material according to one example of the present invention (corresponding to Example 1 described later) processed by laser cutting, and more specifically, molecular orientation of a polarizer.
  • a cross-sectional SEM image of a cut end face in a direction perpendicular to the (light absorption axis) is shown in FIG. 8, an EDX (energy dispersive X-ray analysis) image of the same portion as FIG. 7, and an image shown in FIG.
  • FIG. 10 shows an EDX image at the same position as in FIG.
  • the thickness of the polarizer 10 at the cut end face in the direction perpendicular to the light absorption axis direction of the polarizer 10 is as shown in FIG.
  • bulging (10a) occurs as compared with the thickness other than the vicinity of the cut end face, and the thickness increases 1.1 to 2.5 times.
  • the PVA-based resin containing iodine is thermally stressed by the laser energy, so that the PVA-based resin is contracted in the optical absorption axis direction which is the stretching direction of the PVA-based resin, and as a result, the PVA-based resin is compressed in the optical absorption axis direction. It is considered that this is due to expansion in the thickness direction. Along with this phenomenon, the softened or melted protective film 11 and the pressure-sensitive adhesive flow into the space formed by compression, so that the coating layer (18a) is easily formed. Such a phenomenon is not observed at the cut end surface parallel to the light absorption axis direction of the polarizer 10.
  • the laser light source for example, an infrared laser including a CO 2 laser light source having an oscillation wavelength of laser light in the infrared region of 9 to 11 ⁇ m is preferably used from the viewpoint of high productivity.
  • the infrared laser can easily obtain a power of several tens of W, and further efficiently heats the film and the pressure-sensitive adhesive layer constituting the polarizing optical functional film laminate 1A by molecular vibration associated with infrared absorption, It is possible to cause etching accompanying the phase transition of a substance.
  • the present invention is not limited to the infrared laser, and it is also possible to use a CO 2 laser light source having an oscillation wavelength of laser light of 5 ⁇ m.
  • a near infrared (NIR) light source a visible light (Vis) light source, and an ultraviolet (UV) light source can be used as long as they are pulse laser light sources.
  • the oscillation wavelength of laser light is 1064 nm, 532 nm, 355 nm, 349 nm or 266 nm (Nd: YAG, Nd: YLF, or YVO4) A second harmonic), an excimer laser light source having a laser light oscillation wavelength of 351 nm, 248 nm, 222 nm, 193 nm or 157 nm, and an F2 laser light source having a laser light oscillation wavelength of 157 nm.
  • a pulse wave is preferable to a continuous wave (CW) from the viewpoint of suppressing heat damage to the polarizing film.
  • the pulse width can be appropriately set within the range of 10 femtoseconds (10 ⁇ 14 seconds) to 1 millisecond (10 ⁇ 3 seconds). It is also possible to set and process two or more types of pulse widths.
  • the repetition frequency which is the time interval of pulses, is preferably 1 to 1,000 kHz, and more preferably 10 to 500 kHz.
  • Gaussian beam is preferable because it shows good condensing property, can be made into a small spot, and can be expected to improve productivity. It may be shaped into a flat top beam using a diffractive optical element, an aspherical lens or the like.
  • the laser beam may be irradiated once along the target shape, or may be irradiated multiple times to achieve a desired cutting depth. Further, it is possible to appropriately adjust the processing conditions for the first and second processings within the above-mentioned condition range.
  • a polarizing optical function By using a general scanning device such as a stage drive system such as an XY precision stage, an optical scanning system such as a galvano scanner and a polygon scanner, or a combination thereof (multi-axis synchronous control), a polarizing optical function to be a workpiece.
  • a general scanning device such as a stage drive system such as an XY precision stage, an optical scanning system such as a galvano scanner and a polygon scanner, or a combination thereof (multi-axis synchronous control), a polarizing optical function to be a workpiece.
  • the laser irradiation While changing the relative position of the film laminated body 1A and the laser beam at a predetermined speed, the laser irradiation is controlled to be on / off by using a mechanical shutter mechanism, an AOM (acousto-optical element), or the like, thereby obtaining a desired shape. It becomes possible to process it.
  • the scanning speed of laser irradiation achieves a desired etching depth that can completely cut the polarizing optical functional film laminate 1A in the thickness direction and further form a cutting groove in the sheet material 17 to a sufficient depth. It may be set as appropriate.
  • the laser beam preferably has a focused spot diameter that can be processed with a cutting width of 500 ⁇ m or less, and more preferably has a focused spot diameter that can be processed with a cutting width of 300 ⁇ m or less.
  • the spot diameter is defined as the point where the intensity is reduced to 1 / e 2 as compared with the peak intensity value
  • the focused spot diameter is preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less.
  • a beam expanding unit for adjusting the beam diameter may be arranged in the optical path of the objective lens from the emission end of the laser oscillator to obtain the desired focused spot diameter and cutting width.
  • the laser power may be appropriately set according to the thickness and properties of the polarizing optical functional film laminate 1A to be processed.
  • the laser power is in the range of 5 to 300 W. It is preferable to set to, and it is more preferable to set to the range of 20 to 200W.
  • -It is possible to irradiate two or more types of lasers at the same time, and it is also possible to irradiate two or more types of lasers sequentially.
  • the laser cutting process for the polarizing functional optical film laminate 1A may be performed while continuously feeding the polarizing optical functional film laminate 1A wound in a roll, or may be cut in advance to a predetermined length. You may perform it to 1 A of polarizing functional optical film laminated bodies separated by this.
  • the polarizing optical functional film laminate 1A is continuously or intermittently supplied by a so-called roll-to-roll method, and in the meanwhile, desired
  • an optical element such as a laser light source and a lens or a mirror is placed and fixed on the XY biaxial movable stage, and the XY biaxial movable stage is driven, so that the XY2 of the laser light irradiated to the polarizing film is obtained. Change the position on the dimensional plane.
  • the long strip-shaped film laminate may be stopped from being conveyed or may be synchronously processed according to the feed speed and position while being continuously conveyed.
  • the suction-fixing stage for holding the laminate with sheet material 2 during processing may or may not be provided. It is preferable to provide a dust collecting mechanism in the vicinity of the laser irradiation part for the purpose of suppressing the adhesion of scattered particles, which do not contribute to the formation of the coating layer during processing, to the product.
  • a desired amount of the sheet material-derived material that is scattered from the sheet material by the laser energy received during laser cutting processing and adheres to the cut end surface of the polarizing film can be obtained. It can be a value. Therefore, at the same time as the laser cutting process, a coating layer that contributes to reliability improvement in a high temperature and high humidity environment can be formed on the cut end surface of the polarizing film to obtain the depolarization preventing effect.
  • FIG. 11 is a schematic diagram showing an example of a laser cutting device 30 that can be used in a method of continuously performing laser cutting processing by a roll-to-roll method.
  • a laminated body 31 in which a surface protective film 34, a polarizing film 32, and a release liner 36 are laminated in the same configuration as the polarizing optical function film laminated body 1A shown in FIG. 1 is formed in a long strip shape. It is used as it is.
  • the long strip-shaped laminated body 31 is rolled and formed into a roll 31a, and the roll 31a is rotatably supported by a roll supporting portion (not shown).
  • the sheet material 37 having the same configuration as the sheet material 17 is used in a state of being formed in a long strip shape.
  • the long strip-shaped sheet material 37 is rolled and formed into a roll 37a, and the roll 37a is rotatably supported by a roll supporting portion (not shown).
  • the stacked body 31 and the sheet material 37 fed from the rolls 31a and 37a are fed to the nip of the pair of overlapping rollers 40 in a state of being overlapped with each other.
  • the laminated body 31 and the sheet material 37 are laminated by the superposing roller 40 to form a laminated body 41 with a sheet material, which is sent to the nip of the second superposing roller 42 in the next stage.
  • the anti-contamination film 43 is fed to the second stacking roller 42 on the side of the laminated body 41 with the sheet material that overlaps the surface protection film 34.
  • the anti-contamination film 43 is supplied in the form of a roll, and is rotatably supported by a roll support portion (not shown).
  • the second superimposing roller 42 attaches the pollution control film 43 onto the surface protection film 34 of the sheet material-attached laminate 41, and the sheet material-attached laminate 41 to which the contamination prevention film 43 is attached is moved to the next stage.
  • a laser irradiation device 45 capable of XY biaxial movement is arranged between the second overlapping roller 42 and the guide roller 44.
  • the laser irradiation device 45 irradiates the laminated body 41 with the sheet material with laser light from the upper side of the pollution control film 43, and moves XY biaxially during that time to move the contamination prevention film 43 and the laminated body 41 with the sheet material.
  • a cutting groove 46 is formed as shown in the lower sectional view in FIG. Laser cutting of a desired pattern is performed by the cutting groove 46. As shown in the lower sectional view of FIG. 11, the cutting groove 46 cuts the pollution control film 43 and the laminated body 41 with the sheet material in the thickness direction, and reaches a certain depth in the thickness direction of the sheet material 37. .. Due to the cutting groove 46, a cutting portion 47 having a predetermined pattern is formed in the pollution control film 43 and the sheet material-attached laminate 41.
  • the pollution control film recovery tape 49 formed of an adhesive tape has its adhesive surface
  • the anti-contamination film 43 is pressed against the anti-contamination film 43, and the anti-contamination film 43 is collected from the upper surface of the laminate 41.
  • other unnecessary portions unnecessary materials
  • the sheet material peeling portion 51 is provided with a wedge-shaped peeling plate 51a, and the used sheet material after the laser cutting process is peeled off from the laminate 31 which is a product portion in the peeling plate 51a.
  • the remaining laminated body 31 is sent to the product collecting unit 52 and collected as a product.
  • the laminated body 31 that has reached the product collecting unit 52 may be wound into a roll here to form a product roll.
  • FIG. 11 shows a configuration in which the unnecessary material and the pollution control film are collected separately, but the invention is not limited to this, and it is possible to collect them at the same time.
  • the polarizing film 12 included in the polarizing optical functional film laminate of the present invention is a liquid crystal display device including an automobile meter display unit, a smart watch, goggles, a smartphone, a notebook computer, and a note pad, and further an organic EL display. Since it is used for many devices such as an optical display device such as a device or an optical display panel such as a plasma display panel (PDP), as illustrated in FIGS. 12A to 14, not only a rectangular shape but also a curved shape. It is cut into various shapes, such as shapes with edges and holes.
  • FIGS. 13A and 13B are views showing a cutting processing layout example in the case of manufacturing a product cut out from a large-sized polarizing film into a smartphone shape.
  • FIG. 12A is a plan view showing the whole
  • FIG. 13A and 13B are enlarged plan views showing a part thereof
  • FIGS. 13A and 13B are views showing a cutting processing layout example in the case of manufacturing a product cut out from a large-sized polarizing film into an automobile meter panel shape.
  • FIG. 13B is a plan view showing the whole
  • FIG. 13B is a plan view showing a part of the enlarged view
  • FIG. 14 is a photograph showing a plurality of examples of polarizing films cut out in a smartphone shape. Therefore, the present invention is applicable to cutting of all of these shapes.
  • a laser for cutting it is possible to perform processing having a curved portion with a small radius of curvature (R), and it is possible to handle cutting with a radius of curvature R of 2 mm or less
  • a polarizing film used for an automobile meter panel may have a structure in which a through hole is formed for fixing a meter needle, and it is required to form a through hole having a diameter of 0.5 mm to 100 mm, for example.
  • the laser cutting process of the polarizing film 12 of the present invention is not limited to the above-mentioned shape, and can be applied to various shapes.
  • the method of the present invention is also applicable to a step of slit-cutting a long strip-shaped film laminate including a polarizing film in the longitudinal direction by a laser, and by applying the present invention, a slit-cut long strip-shaped
  • the coating layer according to the present invention can be formed on the cut end surface of the film laminate. This coating layer makes it possible to suppress the deterioration of the cut end surface of the long strip film laminate due to the infiltration of water from the cut end face of the laminate during storage and transportation of the long strip film laminate. ..
  • a long strip-shaped film laminate containing a polarizing film by a roll-to-roll method, while being conveyed, while stopped after being conveyed at a predetermined feed amount, with respect to the conveying direction. It can also be applied to a standard length cutting step of cutting the long strip film laminate in the vertical direction.
  • Example 1 (Polarizing optical functional film laminate) A polymer film having a thickness of 30 ⁇ m, which contains a PVA-based resin as a main component, is sequentially immersed in 5 baths of [1] to [5] below while applying tension that allows stretching in the longitudinal direction of the film, and a stretching ratio of 6 times ( It was stretched with a polymer film manufactured by Kuraray Co., Ltd.). The stretched film was dried to obtain a polarizer 10 having a thickness of 12 ⁇ m.
  • Swelling bath pure water at 30 ° C.
  • Dyeing bath aqueous solution at 30 ° C.
  • First crosslinking bath containing potassium iodide and boric acid, 40 C. aqueous solution
  • Second crosslinking bath 60 ° C. aqueous solution containing potassium iodide and boric acid
  • Washing bath potassium iodide containing 25 C aqueous solution
  • a PVA-based adhesive is applied to one side of the above-described polarizer so that the thickness after drying is 100 nm, and long TAC films having a thickness of 25 ⁇ m are attached to each other so that their longitudinal directions are aligned with each other, and thus the protective film 11a is formed.
  • a PVA-based adhesive was applied to the other side of the above-described polarizer so that the thickness after drying was 100 nm, and a long TAC film having a thickness of 25 ⁇ m was attached so that the longitudinal directions thereof were aligned with each other.
  • the protective film 11b was used.
  • the polarizing film 12 was produced as described above.
  • a hard coat layer is formed on the main surface of the one TAC film 11a opposite to the polarizer so as to have a thickness after drying of 7 ⁇ m to form a surface treatment layer 13, and a surface treatment layer 13 is further formed thereon.
  • the protective film 14 was formed.
  • the surface protection film 14 is composed of a polyethylene terephthalate substrate (thickness 38 ⁇ m) and an acrylic adhesive (thickness 23 ⁇ m).
  • An acrylic adhesive having a thickness of 12 ⁇ m is applied to the main surface of the other TAC film 11b opposite to the polarizer to form an adhesive layer 15, and a release liner made of polyethylene terephthalate is further formed thereon. 16 were stuck together.
  • the pollution control film 23 / surface protection film 14 / hard coat 13 / TAC film 11a / PVA adhesive / polarizer 10 / PVA adhesive / TAC film 11b / pressure-sensitive acrylic pressure-sensitive adhesive layer 15 / peeling A polarizing optical functional film laminate 1A having a structure of the liner 16 and a total thickness of about 180 ⁇ m was obtained.
  • laser A CO 2 laser (J-3 manufactured by Coherent Co., wavelength 9.4 ⁇ m, Gaussian beam, pulse oscillation) was used as the laser oscillator, and the theoretical spot diameter was defined by the objective lens (the spot diameter was defined as the intensity of 1 / e 2 of the peak value). ) Is about 90 ⁇ m, and the XY stage and galvano scanner are used together, and the desired processing shape is scanned once with a laser power of 65 W, a repetition frequency of 30 kHz, and a scanning speed of 500 mm / s. It was cut into a rectangular shape with dimensions of 80 mm ⁇ 50 mm.
  • a sheet material 17 composed of a silicone-based pressure-sensitive adhesive layer 17b (thickness: 75 ⁇ m) and a polyethylene terephthalate substrate 17a (manufactured by Mitsubishi Chemical Corporation, T100-75S, thickness: 75 ⁇ m) is inserted through the above-mentioned silicone-based pressure-sensitive adhesive layer 17b. It was attached to the main surface 16a of the release liner 16 of the above-mentioned polarizing optical function film laminate 1A.
  • the sheet material 17 and the polarizing optical functional film laminate 1A to which the anti-contamination film 43 was attached were laser-cut into a desired shape.
  • the polarizing optical functional film laminate 1A is fully cut along with the silicone-based adhesive layer 17b of the sheet material 17 over the entire thickness, while the polyethylene terephthalate substrate 17a is not completely cut. It was confirmed that the cutting process was performed in the half-cut state.
  • the pollution control film 43 was peeled off, and the height of the burr formed on the cut end surface of the surface protection film 14 was measured, and it was confirmed to be 3 ⁇ m, which is a sufficiently low value.
  • the thickness of the polarizer at the cut end face in the direction perpendicular to the stretching direction of the polarizer 10, that is, in the direction perpendicular to the alignment direction of PVA-based molecules is 1 compared with the thickness of the polarizer other than the vicinity of the cut end face. It was .8 times.
  • the sheet material 17 and the anti-contamination film 43 are peeled off from the sample of the polarizing film that has been laser-cut into a rectangular shape, the cut surface is embedded with an epoxy resin, and the cut cross section is FE-SEM (scanning electron microscope, Japan). SEM images were acquired by observing with JSM-7001F manufactured by Denshi Co., Ltd. (FIGS. 7 and 9). Further, the state of the cut end face of the polarizer 10, in other words, the state of the coating layer was observed from the molecular orientation direction using the same FE-SEM to obtain an SEM image (FIG. 15A). This FIG.
  • FIG. 15A is an SEM image in Example 1, and corresponds to the SEM image seen from the direction of arrow “C” in FIG. 9.
  • FIG. 15B shows similar SEM images in Example 2
  • FIGS. 15C and 15D show similar SEM images in Comparative Examples 1 and 2, respectively.
  • the cut end surface of the polarizer 10 is surely covered with the coating layers 18a and 18b.
  • FIGS. 8 and 10 are EDX images processed by software so that when the coating layers 18a and 18b contain silicon, the silicon is displayed brightly and brightly.
  • the coating layer 18b formed on the cut end face of the polarizing film contains silicon (Si element) derived from the silicone-based pressure-sensitive adhesive layer 17b forming the sheet material 17. .. Further, the coating layer 18b had a thickness of about 2 to 5 ⁇ m.
  • TOF- was used for the location corresponding to the location in FIG. 9 by using the time-of-flight secondary ion mass spectrometer of ULVAC-PHI, Inc. Analysis by SIMS was performed. More, obtained by analysis, C-derived PET 8 H 5 O 4 - ( m / z 165) (m / z represents the mass-to-charge ratio) in view of the ionic strength of the mapping data did.
  • FIG. 16 shows an image showing the analysis result. From this image, it was confirmed that a film of polyethylene terephthalate (PET) was formed not only on the coating layer 18b but also on the coating layer 18a.
  • PET polyethylene terephthalate
  • a cutting groove 17-1a having a width of 40 ⁇ m and a depth of about 100 ⁇ m formed by cutting with laser energy was confirmed. This indicates that at least the component of the sheet material 17 scattered from the cutting groove 17-1a adheres to the cut end surface of the polarizing film 12 and forms the coating layers 18a and 18b (FIG. 17). ..
  • FIG. 18 is a graph showing the results of component analysis of the materials contained in the coating layers 18a and 18b in Example 1. More specifically, it is a graph showing the EDX elemental analysis result of the portion indicated by the arrow “B” in FIG. 10, where the horizontal axis shows the X-ray energy (keV) and the vertical axis shows the X-ray count number. As shown in this figure, in this example, carbon (C) and oxygen (O) were detected in addition to silicon (Si) from the coating layers 18a and 18b. As can be seen from this, the coating layers 18a and 18b formed on the cut end surface of the polarizer 10 include at least the polarizing film 12, the adhesive layer 15, the release liner 16, the organic component derived from the sheet material, and the sheet material. It can be seen that the layer is formed by mixing with silicon (Si) derived from the adhesive layer 17b.
  • the surface protective film 14 and the release liner 16 were peeled from the sample of the manufactured rectangular polarizing optical functional film laminate 1A, and they were attached to the glass plate so that the surface of the pressure-sensitive adhesive layer 15 was in contact.
  • the sample was put in an oven set to an environment of a temperature of 65 ° C. and a humidity of 90% to perform a reliability test.
  • the condition of the reliability test was to hold the sample in an oven in the above environment for 240 hours (10 days) and observe depolarization due to color loss of the polarizing film 12 on the processed end face in a high temperature and high humidity environment.
  • the depolarization width of the cut end surface (alignment parallel surface) parallel to the light absorption axis of the polarizer was 135 ⁇ m, and the depolarization width of the cut end surface (alignment division cross section) perpendicular to the light absorption axis was 183 ⁇ m. It was It can be seen that the depolarization width can be suppressed as compared with the comparative example described later.
  • Example 2 In the sheet material 17, the acrylic pressure-sensitive adhesive layer (thickness 23 ⁇ m) was used as the pressure-sensitive adhesive layer 17 b, the polyethylene terephthalate substrate (thickness 38 ⁇ m) was used as the resin film substrate 17 a, and the laser power was changed to 55 W. Except for the above, evaluation of depolarization due to laser cutting and color loss of the polarizer 10 was performed under the same conditions as in Example 1.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer 10 was 153 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 216 ⁇ m.
  • the depolarization width could be suppressed as compared with the comparative example described later.
  • Example 3 In the sheet material 17, a rubber-based pressure-sensitive adhesive layer (thickness 10 ⁇ m) was used as the pressure-sensitive adhesive layer 17 b, a polyethylene terephthalate substrate (thickness 38 ⁇ m) was used as the resin film substrate 17 a, and the laser power was changed to 55 W. Except for the above, evaluation of depolarization due to laser cutting and color loss of the polarizer 10 was performed under the same conditions as in Example 1.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 120 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 191 ⁇ m.
  • the depolarization width could be suppressed as compared with the comparative example described later.
  • Example 4 The same conditions as in Example 2 except that the thickness of the polarizer 10 was set to 5 ⁇ m, the protective film 11b was removed, a base material in which the thickness of the silicone adhesive layer was 20 ⁇ m was used, and the laser power was changed to 35 W. Then, evaluation of depolarization caused by laser cutting and color loss of the polarizer 10 was performed. Note that FIG. 5 corresponds to the SEM image obtained by removing the anti-contamination film from the configuration of Example 4.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 113 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 103 ⁇ m.
  • the depolarization width could be suppressed as compared with Comparative Example 3 described later.
  • Example 1 Except that the polarizing optical functional film laminate 1A described in Example 1, which does not use the sheet material and the pollution control film 23, is cut into a predetermined shape using an end mill, that is, a rectangular shape having a size of 80 mm ⁇ 50 mm. The evaluation was performed under the same conditions as in Example 1.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 182 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 251 ⁇ m.
  • the depolarization width was larger than in Examples 1 and 2.
  • Example 2 Under the same conditions as in Example 1 except that the sheet material was not used and the laser power was changed to 55 W, the laser cutting process and the depolarization caused by the color loss of the polarizer 10 were evaluated. In this case, it was confirmed that the polarizing optical functional film laminate 1A was fully cut, while the release liner 16 was not completely cut, but was cut into a half-cut state.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 170 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 231 ⁇ m.
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer 10 was 129 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 177 ⁇ m.
  • the depolarization width was larger than that in Example 4.
  • Example 5 Due to the laser cutting process and color loss of the polarizer 10 under the same conditions as in Example 1 except that the pollution control film 23 was not used, and the laser power was changed to 43 W and the repetition frequency was 15 kHz. Depolarization evaluation was performed. As a result, the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 122 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 195 ⁇ m. The depolarization width could be suppressed as compared with the comparative example described later.
  • Example 6 The TOF-SIMS analysis was performed under the same conditions as in Example 2 except that the pollution control film 23 was not used, the laser power was changed to 39 W, and the repetition frequency was 15 kHz. Also, depolarization caused by color loss of the polarizer 10 was evaluated.
  • FIG. 19 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that a film of polyethylene terephthalate (PET) was formed not only on the coating layer 18b but also on the coating layer 18a.
  • PET polyethylene terephthalate
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 132 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 214 ⁇ m.
  • the depolarization width could be suppressed as compared with the comparative example described later.
  • Example 7 Analysis by TOF-SIMS was performed under the same conditions as in Example 2 except that the pollution control film 23 was not used, the laser power was changed to 20 W, the repetition frequency was 15 kHz, and the number of scans was 2. Further, evaluation of depolarization caused by laser cutting and color loss of the polarizer 10 was performed.
  • FIG. 20 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that a film of polyethylene terephthalate (PET) was formed not only on the coating layer 18b but also on the coating layer 18a.
  • PET polyethylene terephthalate
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 133 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 233 ⁇ m.
  • the depolarization width could be suppressed as compared with the comparative example described later. Further, it was revealed that by lowering the laser power and increasing the number of scans, the result is comparable to the case where the laser power is strong and the number of scans is small.
  • Example 4 Analysis was performed by TOF-SIMS under the same conditions as in Example 5 except that the sheet material was not used and the laser power was changed to 20 W. Also, due to laser cutting and color loss of the polarizer 10. The depolarization evaluation was performed. In this case, it was confirmed that the release liner 16 of the polarizing optical functional film laminate 1A was not completely cut, but cut into a half-cut state.
  • FIG. 21 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that no polyethylene terephthalate (PET) film was formed on the coating layers 18a and 18b.
  • PET polyethylene terephthalate
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 158 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 235 ⁇ m.
  • the depolarization width was larger than that in Example 5.
  • FIG. 22 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that no polyethylene terephthalate (PET) film was formed on the coating layers 18a and 18b.
  • PET polyethylene terephthalate
  • the depolarization width of the cut end surface parallel to the light absorption axis of the polarizer was 163 ⁇ m, and the depolarization width of the cut end surface perpendicular to the light absorption axis was 268 ⁇ m.
  • the depolarization width was larger than that in Example 6.
  • FIG. 23 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that a film of polyethylene terephthalate (PET) was formed not only on the coating layer 18b but also on the coating layer 18a. As a result, it was found that a film of polyethylene terephthalate (PET) was formed on the coating layers 18a and 18b even when the pollution control film 23 and the like were not present.
  • PET polyethylene terephthalate
  • FIG. 24 is an image showing the analysis result by TOF-SIMS. From this figure, it was confirmed that no polyethylene terephthalate (PET) film was formed not only on the coating layer 18b but also on the coating layer 18a. As a result, it was found that when the release liner and the sheet material were not used, the polyethylene terephthalate (PET) film was not formed on the coating layers 18a and 18b even if the anti-contamination film 23 and the like were present.
  • PET polyethylene terephthalate
  • the coating layers 18a and 18b include at least the component of the sheet material 17, that is, the component of the pressure-sensitive adhesive layer 17b, and / or the PET component of the resin film substrate 17a. Therefore, by appropriately selecting the components of these sheet materials, particularly for the pressure-sensitive adhesive layer 17b, it is possible to effectively prevent water from entering the polarizer 10 from the outside through the cut end face, Prevention of color loss, in other words, reduction of depolarization width can be expected.
  • the polarizing optical functional film laminate 1 constitutes the polarizing optical functional film laminate 1A including the pressure-sensitive adhesive layer 15 and the release liner 16, depending on the components of the pressure-sensitive adhesive layer 15, further
  • the coating layers 18a and 18b can be made thicker and the entry of water can be prevented more effectively.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Polarising Elements (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé de découpe laser et d'usinage pour un stratifié de film optiquement fonctionnel polarisant comprenant, en tant qu'élément constitutif minimal, un film polarisant ayant un film protecteur stratifié sur au moins un côté d'un polariseur. Ce procédé de découpe et d'usinage découpe au laser et usine un stratifié de film optiquement fonctionnel polarisant ayant au moins un film polarisant ayant un film protecteur stratifié sur au moins un côté d'un polariseur. Le procédé découpe le stratifié de film optiquement fonctionnel polarisant en une forme prescrite par la réalisation d'une découpe au laser, par lequel : un matériau en feuille est empilé et disposé sur une surface du stratifié de film optiquement fonctionnel polarisant, ladite feuille étant séparée du stratifié de film optiquement fonctionnel polarisant ; une lumière laser est irradiée dans la direction de l'épaisseur du stratifié de film optiquement fonctionnel polarisant, à partir de l'autre surface du stratifié de film optiquement fonctionnel polarisant, ladite surface étant positionnée sur le côté opposé au matériau en feuille ; et la position d'irradiation laser étant déplacée le long d'une forme prescrite dans la surface dans le plan du stratifié. Le matériau en feuille est configuré de telle sorte que : un composant de matériau en feuille, présent dans une partie de la direction de l'épaisseur du matériau en feuille, devient des gouttelettes et est dispersé pendant une irradiation laser en raison de l'énergie laser ; et au moins une partie des gouttelettes de composant de matériau en feuille s'accumulent sur une face d'extrémité découpée au laser formée sur le polariseur dans le stratifié de film optiquement fonctionnel polarisant. Une couche de revêtement comprenant au moins le composant de matériau en feuille est formée de manière à recouvrir la face d'extrémité découpée au laser du polariseur.
PCT/JP2019/043124 2018-11-02 2019-11-01 Procédé de découpe laser et d'usinage pour un stratifié de film optiquement fonctionnel polarisant WO2020091065A1 (fr)

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CN201980071904.4A CN112969939B (zh) 2018-11-02 2019-11-01 偏光性光学功能膜层叠体的激光切割加工方法
JP2020554989A JP7316297B2 (ja) 2018-11-02 2019-11-01 偏光性光学機能フィルム積層体のレーザー切断加工方法
KR1020217013601A KR102433467B1 (ko) 2018-11-02 2019-11-01 편광성 광학 기능 필름 적층체의 레이저 절단 가공 방법

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021186986A1 (fr) * 2020-03-16 2021-09-23 住友化学株式会社 Feuille stratifiée et son procédé de fabrication
US20210311241A1 (en) * 2020-04-07 2021-10-07 Samsung Display Co., Ltd. Electronic device and method of manufacturing the same
WO2022054295A1 (fr) * 2020-09-14 2022-03-17 日東電工株式会社 Plaque de polarisation, plaque de polarisation équipée d'une couche de retard, et dispositif d'affichage d'image comprenant ladite plaque de polarisation ou ladite plaque de polarisation équipée d'une couche de retard
JP7509823B2 (ja) 2022-05-26 2024-07-02 日東電工株式会社 偏光板、偏光板の製造方法、位相差層付偏光板、ならびに、該偏光板または該位相差層付偏光板を含む画像表示装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118040108A (zh) * 2024-04-11 2024-05-14 宁德时代新能源科技股份有限公司 极片的制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10206633A (ja) * 1997-01-22 1998-08-07 Casio Comput Co Ltd 偏光板およびその製造方法
JP2009294649A (ja) * 2008-05-07 2009-12-17 Nitto Denko Corp 偏光板、およびその製造方法
WO2018190181A1 (fr) * 2017-04-13 2018-10-18 日東電工株式会社 Procédé de production de dispositif d'affichage d'image et dispositif d'affichage d'image

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2921345B2 (ja) 1993-07-20 1999-07-19 株式会社大林組 橋桁のダンパー装置
JPH08146219A (ja) 1994-11-25 1996-06-07 Sekisui Chem Co Ltd 反射偏光板
GB2402230B (en) * 2003-05-30 2006-05-03 Xsil Technology Ltd Focusing an optical beam to two foci
JP4690697B2 (ja) * 2004-11-01 2011-06-01 古河電気工業株式会社 半導体チップの製造方法
JP2008073742A (ja) * 2006-09-22 2008-04-03 Nitto Denko Corp 光学フィルムの切断方法及び光学フィルム
JP2009006350A (ja) * 2007-06-27 2009-01-15 Sony Corp レーザ加工装置とその加工方法、デブリ回収機構とその回収方法、並びに表示パネルの製造方法
JP2011022202A (ja) * 2009-07-13 2011-02-03 Sumitomo Chemical Co Ltd 偏光板およびそれを用いた画像表示装置
CN102282485B (zh) * 2009-08-06 2012-08-29 住友化学株式会社 偏光板的制造方法
JP5764430B2 (ja) * 2011-08-22 2015-08-19 花王株式会社 積層体の製造方法
CN103212855B (zh) * 2012-01-19 2016-02-24 昆山思拓机器有限公司 含同轴水射流结构的激光切割机
JP2015009250A (ja) * 2013-06-27 2015-01-19 昭和電工株式会社 レーザー加工方法
KR101817388B1 (ko) * 2014-09-30 2018-01-10 주식회사 엘지화학 편광판의 절단 방법 및 이를 이용하여 절단된 편광판
CA2957234C (fr) * 2016-02-12 2020-12-15 Kondex Corporation Bord de coupe revetu au laser destine a des composantes de coupe agricoles
KR20170098569A (ko) * 2016-02-22 2017-08-30 주식회사 엘지화학 편광필름 및 그 제조방법
JP6887759B2 (ja) 2016-05-17 2021-06-16 日東電工株式会社 光学積層体、ならびに該光学積層体を用いた光学フィルム片の製造方法
JP6899721B2 (ja) 2016-07-22 2021-07-07 日東電工株式会社 偏光板の製造方法およびその製造装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10206633A (ja) * 1997-01-22 1998-08-07 Casio Comput Co Ltd 偏光板およびその製造方法
JP2009294649A (ja) * 2008-05-07 2009-12-17 Nitto Denko Corp 偏光板、およびその製造方法
WO2018190181A1 (fr) * 2017-04-13 2018-10-18 日東電工株式会社 Procédé de production de dispositif d'affichage d'image et dispositif d'affichage d'image

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021186986A1 (fr) * 2020-03-16 2021-09-23 住友化学株式会社 Feuille stratifiée et son procédé de fabrication
US20210311241A1 (en) * 2020-04-07 2021-10-07 Samsung Display Co., Ltd. Electronic device and method of manufacturing the same
US11719872B2 (en) * 2020-04-07 2023-08-08 Samsung Display Co., Ltd. Electronic device and method of manufacturing the same
WO2022054295A1 (fr) * 2020-09-14 2022-03-17 日東電工株式会社 Plaque de polarisation, plaque de polarisation équipée d'une couche de retard, et dispositif d'affichage d'image comprenant ladite plaque de polarisation ou ladite plaque de polarisation équipée d'une couche de retard
JP2022047611A (ja) * 2020-09-14 2022-03-25 日東電工株式会社 偏光板、位相差層付偏光板、ならびに、該偏光板または該位相差層付偏光板を含む画像表示装置
JP7221256B2 (ja) 2020-09-14 2023-02-13 日東電工株式会社 偏光板、位相差層付偏光板、ならびに、該偏光板または該位相差層付偏光板を含む画像表示装置
JP7509823B2 (ja) 2022-05-26 2024-07-02 日東電工株式会社 偏光板、偏光板の製造方法、位相差層付偏光板、ならびに、該偏光板または該位相差層付偏光板を含む画像表示装置

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JPWO2020091065A1 (ja) 2021-10-07
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