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WO2017099449A1 - Plaque polarisante complexe et dispositif d'affichage d'image la comprenant - Google Patents

Plaque polarisante complexe et dispositif d'affichage d'image la comprenant Download PDF

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Publication number
WO2017099449A1
WO2017099449A1 PCT/KR2016/014231 KR2016014231W WO2017099449A1 WO 2017099449 A1 WO2017099449 A1 WO 2017099449A1 KR 2016014231 W KR2016014231 W KR 2016014231W WO 2017099449 A1 WO2017099449 A1 WO 2017099449A1
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WO
WIPO (PCT)
Prior art keywords
polarizing plate
composite
retardation layer
epoxy compound
polarizer
Prior art date
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Ceased
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PCT/KR2016/014231
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English (en)
Korean (ko)
Inventor
최윤석
권용현
육근선
조천희
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Dongwoo Fine Chem Co Ltd
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Dongwoo Fine Chem Co Ltd
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Priority claimed from KR1020160129846A external-priority patent/KR101783210B1/ko
Application filed by Dongwoo Fine Chem Co Ltd filed Critical Dongwoo Fine Chem Co Ltd
Priority to CN201680067058.5A priority Critical patent/CN108291995B/zh
Publication of WO2017099449A1 publication Critical patent/WO2017099449A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers

Definitions

  • the present invention relates to a composite polarizing plate and an image display device including the same.
  • a flexible display is a display manufactured using a thin flexible substrate that can be bent or bent, and can be distinguished into a rugged display, a bendable display, and a rollable display according to a use and a function.
  • Thin film transistor (TFT) element substrates for liquid crystal display (LCD) or organic EL display (OLED) substrates, color filter substrates, substrates for touch screen panels, and substrates for solar cells It is a display that is being developed to secure various applications from space and form constraints by replacing the heavy and fragile plate glass used in flat panel displays (FPD) with thin, flexible substrates.
  • FPD flat panel displays
  • the flexible substrate used in the flexible display forms a multilayer structure, and an adhesive is used for bonding between retardation layers included in the multilayer structure.
  • the flexible substrate is often bent when used, if the bonding strength between the retardation layer is weak, problems such as expansion of the adhesive layer or peeling between the retardation layer occurs.
  • Korean Patent No. 1191865 discloses a technology related to a flexible substrate.
  • An object of the present invention is to provide a composite polarizing plate in which the bending property of a display and the adhesive property between retardation layers are improved.
  • an object of the present invention is to provide a composite polarizing plate in which the stiffness of the composite retardation layer is improved, the bending property is improved, and exhibits good light leakage characteristics.
  • the present invention can provide an image display device including the composite polarizing plate as described above.
  • polarizer disposed on at least one surface of the polarizer and stacked from the polarizer in order of a first retardation layer, a photocurable adhesive layer, and a second retardation layer, wherein the composite retardation layer is in a range of 20 to 90 ° C.
  • the slope with respect to the temperature of the stiffness is from -514 to -275.
  • the photocurable adhesive comprises a cycloaliphatic epoxy compound and a linear aliphatic epoxy compound, composite polarizing plate.
  • the photocurable adhesive is a weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound of 1: 1.5 to 4, the composite polarizing plate.
  • the linear aliphatic epoxy compound is neopentyl glycol diglycidyl ether (neopentyl glycol diglycidyl ether), 1,2,7,8-diepoxyoctane (1,2,7,8-Diepoxyoctane ), 1,4-Butanediol diglycidyl ether, 2-Ethyl Hexyl Glycidyl Ether, 1,2-Epoxy-9-decene (1) At least one selected from the group consisting of, 2-Epoxy-9-decene) and 2,3-epoxy-1- (1-ethoxyethoxy) propane (2,3-Epoxy-1- (1-ethoxyethoxy) propane) Phosphorus composite polarizer.
  • the coating thickness of the photocurable adhesive layer is 0.01 to 5 ⁇ m, composite polarizing plate.
  • the thickness of the composite retardation layer is 2 to 7 ⁇ m, the composite polarizing plate.
  • the polarizer comprises a polarizing film, or a polarizing coating on the base film and the base film, the composite polarizing plate.
  • the composite retardation layer is disposed on one surface of the polarizer
  • the other side of the protective film is a composite polarizing plate.
  • the image display device including the composite polarizing plate of any one of the above 1 to 10.
  • the bending property of the display and the adhesive property between the phase difference layers may be improved.
  • the composite polarizing plate of the present invention may exhibit good light leakage characteristics due to the improvement in the bending property due to the decrease in the expansion ratio due to the stiffness of the composite retardation layer.
  • the composite polarizing plate of the present invention can reduce the defective rate since the separation film peeling process is unnecessary during the manufacturing process.
  • the present invention can provide an image display device including the composite polarizing plate as described above.
  • FIG. 2 is a schematic cross-sectional view of a composite polarizing plate according to an embodiment of the present invention.
  • One embodiment of the present invention is a polarizer; And a composite retardation layer disposed on at least one surface of the polarizer and laminated from the polarizer in order of a first retardation layer, a photocurable adhesive layer, and a second retardation layer, wherein the composite retardation film is in a range of 20 to 90 ° C.
  • the slope of the stiffness with respect to the temperature at -514 to -275 improves the bending characteristics of the display, the adhesion between the retardation layers, the stiffness of the composite retardation layer, and the warping characteristics.
  • the present invention relates to a polarizing plate including a composite retardation layer.
  • the composite polarizing plate of the present invention includes a polarizer and a composite retardation layer disposed on at least one surface of the polarizer.
  • the polarizer may use a polarizer commonly used in the art and is not particularly limited in kind.
  • the polarizer may be imparted with a polarizing function through a single polarizing film itself as a film form, or as a coating film. It may be imparted through a polarization coating formed on.
  • the polarizer may be obtained by swelling, dyeing, crosslinking, stretching, washing and drying the polarizer forming film containing the polarizer-forming resin, the polarizer by coating a composition containing the polarizer-forming resin on the base film It may be obtained by forming a laminated film and stretching, dyeing, crosslinking, washing with water, drying or the like of the laminated film.
  • the polarizer-forming resin used in the above-mentioned polarizing film or polarizing coating is not particularly limited as long as it is a dichroic substance, that is, a resin which can be dyed by iodine.
  • a resin which can be dyed by iodine for example, polyvinyl alcohol-based resin, polyvinyl dehydrated Alcohol-based resins, dehydrochlorinated polyvinyl alcohol-based resins, polyethylene terephthalate-based resins, ethylene-vinyl acetate copolymer resins, ethylene-vinyl alcohol copolymer resins, cellulose-based resins, partially gumified resins thereof, and the like.
  • polyvinyl alcohol-based resins are preferred as the resin for polarizer formation from the viewpoint of excellent not only the effect of enhancing the uniformity of the degree of polarization in the plane but also the excellent dyeing affinity for iodine.
  • the thickness of the film for forming a polarizer or the film obtained by coating the resin for forming a polarizer is not particularly limited.
  • the thickness of the film for forming a polarizer may be 10 to 150 ⁇ m, and the composition contains a resin for forming a polarizer.
  • the thickness of the polarizing coating formed by coating on the base film may be 3 to 30 ⁇ m.
  • the composite polarizing plate according to an embodiment of the present invention may use an optical film capable of expressing polarization characteristics by coating a liquid crystal in addition to the polarizer described above.
  • the composite retardation layer according to the present invention is disposed on at least one surface of the polarizer.
  • the composite retardation layer and the polarizer may directly contact each other, and may further include a separate layer therebetween, and may further include a protective film therebetween.
  • the composite retardation layer according to the present invention is formed by laminating from the polarizer in the order of the first retardation layer, the photocurable adhesive layer and the second retardation layer.
  • the retardation film laminate according to the present invention has a slope with respect to the temperature of the stiffness in the range of 20 to 90 ° C -514 to -275.
  • the first retardation layer and the second retardation layer are used for the OLED display, and when used in the flexible display, excellent bending characteristics are required.
  • the present invention introduces a composite retardation layer in which the first retardation layer and the second retardation layer are bonded with a photocurable adhesive, and a stiffness slope in a specific temperature range of the composite retardation layer is -514 to -275. To solve the above problems.
  • a release film carrier film
  • foreign material inflow defects due to static electricity generated during release film release during the manufacturing process are generated.
  • the composite retardation layer according to the present invention uses a photocurable adhesive layer, the release film peeling process is unnecessary during the manufacturing process, thereby reducing the defective rate.
  • the photocurable adhesive agent is formed to be thinner than the pressure-sensitive adhesive layer, it exhibits sufficient adhesive force, so that the composite polarizing plate can be thinned, whereby the bending property can be improved.
  • the composition and content of the photocurable adhesive layer according to the present invention it is possible to adjust the adhesion strength, heat resistance, durability, the size of the stiffness with respect to temperature.
  • the slope of the stiffness is less than -514, the folding traces occur, the interface peeling, poor appearance or deformation occurs, and if the slope of the stiffness is more than -275 cracks.
  • the thickness of the composite retardation layer is not particularly limited, but may be, for example, 2 to 7 ⁇ m. In this case, the bending property and the adhesive property between the retardation layers may be improved, and 20 to 90 ° C. of the composite retardation layer according to the present invention. It may be desirable for the slope of the stiffness to be designed from -514 to -275 in the temperature range of.
  • the composite retardation layer according to the present invention may be bonded to the polarizer by means known in the art, for example, an adhesive, an adhesive may be used, preferably an adhesive may be used.
  • the first retardation layer and the second retardation layer according to the present invention are bonded with the photocurable adhesive layer interposed therebetween.
  • the first retardation layer and the second retardation layer may be used.
  • it may be a stretched or unstretched polymer film, a liquid crystal layer obtained by curing a reactive liquid crystal compound, and specifically, the first retardation layer may be a ⁇ / 2 retardation layer, and the second retardation layer may be a ⁇ / 4 retardation layer.
  • the first retardation layer may be a ⁇ / 2 retardation layer
  • the second retardation layer may be a ⁇ / 4 retardation layer.
  • a reactive liquid crystal compound may be used as a liquid crystal compound having optical anisotropy and crosslinking by light or heat.
  • a liquid crystal compound having optical anisotropy and crosslinking by light or heat examples thereof include the information described in Information Display 10 Volume 1 (Recent Research Trends of Reactive Liquid Crystal Monomer (RM)).
  • the liquid crystal compound may be coated on the base film to form a liquid crystal film, and the coating method is not particularly limited, but specifically, pin coating, roll coating, dispensing coating, or gravure coating may be used. It is desirable to determine the type and amount of solvent depending on the coating method.
  • the base film is not limited to a specific kind, but one of the protective films described below may be selected.
  • the photocurable adhesive layer which concerns on this invention is used in the part which requires the bonding between the 1st phase difference layer and the 2nd phase difference layer of a composite retardation layer.
  • the photocurable adhesive layer according to the present invention may be further applied between the polarizer and the protective substrate or between the protective substrate and the composite retardation layer.
  • the photocurable adhesive layer according to the present invention may be formed of a photocurable adhesive composition capable of performing photocurable adhesion, and the photocurable adhesive composition may be used without particular limitation as long as it can perform photocurable adhesion.
  • the photocurable adhesive composition may include a photopolymerizable compound, a photoinitiator, and the like.
  • the photopolymerizable compound may be an optical radical polymerizable compound or a photo cationic polymerizable compound known in the art. These can be used individually or in mixture of 2 or more types.
  • radical photopolymerizable compound employ the radical photopolymerizable compound exemplified in paragraph [0100] of Korean Patent Laid-Open Publication No. 2015-0017446.
  • a polymer polymerized with the monomers may be used as the radical photopolymerizable compound.
  • Examples of the photo cationic polymerizable compound employ the photo cationic polymerizable compound exemplified in the paragraph of Korean Patent Laid-Open Publication No. 2015-0017446.
  • Photocurable adhesive composition it may be preferable to include an alicyclic epoxy compound and a linear aliphatic epoxy compound in terms of adhesive properties and stiffness control.
  • the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is preferably in the range of 1: 1.5 to 1: 4, and more preferably in the range of 1: 2 to 1: 4. If the above range is satisfied, the bending property is improved due to the improvement of interlayer peeling and the decrease of the expansion rate due to the improved stiffness through the improved adhesive property between the retardation layers, thereby exhibiting good light leakage characteristics.
  • the alicyclic epoxy compound and the linear aliphatic epoxy compound are not particularly limited.
  • the alicyclic epoxy compound may be 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (3,4). -Epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate)
  • Linear aliphatic epoxy compounds include neopentyl glycol diglycidyl ether, 1,2,7,8-diepoxyoctane (1,2,7,8-Diepoxyoctane), 1,4-butanediol diol 1,4-Butanediol diglycidyl ether, 2-Ethyl Hexyl Glycidyl Ether, 1,2-Epoxy-9-decene ), And 2,3-epoxy-1- (1-ethoxyethoxy) propane (2,3-Epoxy-1- (1-ethoxyethoxy) propane).
  • the cycloaliphatic epoxy compound and the linear aliphatic epoxy compound may further include other photo radical polymerizable compounds and photo cationic polymerizable compounds as necessary, and the content thereof may be 1 to 20 based on the total weight of the photocurable adhesive composition. A weight percent range is preferred.
  • the content of the photocationic polymerization initiator, the content of the photopolymerization initiator and the coating method of the photocurable adhesive composition uses the contents of paragraphs [0102] to [0104] of Korea Patent Publication No. 2015-0017446.
  • the coating thickness of a photocurable adhesive composition is not specifically limited, For example, it can coat with 0.01-5 micrometers, Preferably it is 0.5-3 micrometers.
  • the coating thickness of the photocurable adhesive composition exceeds 5 ⁇ m, application to a polarizing plate for general display is possible, but cracking of the protective substrate may occur when evaluating the bending property of the flexible display.
  • the protective film may be bonded to at least one surface of the polarizer.
  • the protective film may be bonded to the other surface.
  • the protective film may be disposed between the composite retardation layer and the polarizer, but is not limited thereto.
  • Examples of the protective film and its contents use the contents of paragraphs [0111] to [0114] of Korean Patent Application Publication No. 2015-0015569.
  • thermosetting or ultraviolet curing resin may be a cured layer formed from an aryl resin, a urethane resin, an acryl-urethane resin, an epoxy resin, a silicone resin or the like, but is not limited to a specific film and may be used in consideration of adhesion or durability.
  • the thickness of the protective film is not particularly limited, but may be 10 to 200 ⁇ m, preferably 10 to 150 ⁇ m.
  • each protective film may have the same or different thickness from each other.
  • composite polarizing plate of the present invention can be usefully applied to an image display device or the like in combination with other conventional configurations.
  • an image display device not only an ordinary liquid crystal display device but also an electroluminescent display device, a plasma display device, a field emission display device, an OLED, etc. can be mentioned, In the case where the composite polarizing plate of this invention is applied to OLED, It is preferable to arrange
  • a 75 ⁇ m thick polyvinyl alcohol film (PS 7500, Kuraray) having an average degree of polymerization of 2,400 and a saponification degree of 99.9% or more was swelled by immersion in water (deionized water) at 30 ° C. for 2 minutes and then 3.5 mmol / L of iodine After dyeing by immersion for 4 minutes in an aqueous solution for dyeing at 30 °C containing 2% by weight of potassium iodide, 2% by weight of potassium iodide, 3.7% by weight of boric acid, 4.5 mol of lithium chloride per 1 mole of potassium iodide It was immersed in an aqueous solution for crosslinking at ⁇ ⁇ for 2 minutes to crosslink.
  • the polarizer was manufactured so that the cumulative draw ratio up to each swelling / dyeing / crosslinking / washing step may be 5.5 times.
  • Noren W151 (Sumitomo Chemical Co., Ltd.)
  • Noren FLX80E4 (Sumitomo Chemical Co., Ltd.) is placed on both sides of the resin layer to produce a three-layer base film by co-extrusion using a multilayer extrusion molding machine, and then polyvinyl alcohol powder.
  • Z-200 (Japan Synthetic Co., Ltd.) was heated to 90 ° C. to prepare an aqueous solution of 3% by weight, and then a crosslinking agent, Sumirejin 650 (Daoka Chemical Co., Ltd.), was mixed at a ratio of 1% by weight to 2% by weight of polyvinyl alcohol powder.
  • a coating solution for forming a primer layer To obtain a coating solution for forming a primer layer, and heated polyvinyl alcohol powder PVA124 (Kuraray Co., Ltd.) at 90 ° C. to prepare an aqueous solution of 8% by weight to prepare a coating solution for forming a polyvinyl alcohol-based resin, followed by corona treatment on the multilayer base film. After coating, the primer layer was coated on the corona treated surface using a microgravure coater and dried at 80 ° C. for 3 minutes to form a primer layer having a thickness of 0.2 ⁇ m. Coating a carbonyl alcohol-based coating solution, which was continuously form a series of 10 ⁇ m thick polyvinyl alcohol resin layer and dried at 90 °C 5 minutes.
  • the obtained multilayer film was stretched 5.8 times with a thermal roll at 160 ° C., immersed in pure water at 60 ° C. for 1 minute, immersed for 3 minutes in a dye solution of iodine and potassium iodide, and then stained with 75 containing boric acid and potassium iodide. It was immersed in a crosslinking solution of 10 minutes for 10 minutes, washed with 10 °C pure water, and then dried at 80 °C 5 minutes to prepare a polyvinyl alcohol polarizer having a thickness of 3.8 ⁇ m.
  • the adhesive composition was formulated by combining 20 wt% of Daicel's alicyclic epoxy compound CEL 2021P, 80 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether, and 4 wt% of cationic photoinitiator CPI-110A of acid eprosa.
  • the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 4.
  • the photocurable adhesive composition thus prepared was bonded to have a thickness of 3 ⁇ m between the ⁇ / 2 retardation layer and the ⁇ / 4 retardation layer, and then UV cured in a high-pressure mercury lamp (UVA accumulated light amount of 500 mJ / cm 2 ) to form a composite retardation layer. .
  • One surface of the polarizer of Preparation Example 1 was applied to a triacetyl cellulose-based film (FUJI Co., Ltd.) by applying and drying a water-based adhesive, and bonded to the other surface by using a film-type acrylic pressure-sensitive adhesive on the ⁇ / 2 phase difference layer side of the composite retardation layer. Splicing.
  • the film type acrylic adhesive was further bonded to the (lambda) / 4 phase (s) difference layer side of the said bonding structure, and the polarizing plate was produced.
  • FIG. 2 is a schematic cross-sectional view of the composite polarizing plate.
  • a polarizing plate was prepared in the same manner as in Example 1 except that 30 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 70 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 2.3.
  • Example 2 20% by weight of Daicel's alicyclic epoxy compound CEL 2021P, 70% by weight of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether and 10% by weight of 1,2,7,8-diepoxyoctane
  • the same polarizing plate as that in Example 1 was prepared except that the composition was prepared, and the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 4.
  • Example 2 The same polarizing plate as in Example 1, except that 20 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 80 wt% of Aldrich's linear aliphatic epoxy compound 1,2,7,8-diepoxyoctane were prepared. In this case, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 4.
  • Example 2 Same as Example 1 except that 20% by weight of Daicel's alicyclic epoxy compound CEL 2021P and 80% by weight of Aldrich's linear aliphatic epoxy compound 1,4-butanediol diglycidyl ether were prepared. A polarizing plate was prepared, and the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 4.
  • Example 2 The same polarizing plate as in Example 1 was prepared except that 20 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 80 wt% of Aldrich's linear aliphatic epoxy compound 2-ethylhexyl glycidyl ether were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 4.
  • Example 2 The same polarizing plate as in Example 1 was prepared except that 20 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 80 wt% of Aldrich's linear aliphatic epoxy compound 1,2-epoxy-9-decene were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 4.
  • Example 2 20 wt% of Daicel's alicyclic epoxy compound CEL 2021P, 70 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglycidyl ether, and 10 wt% of aromatic Aldrich's aromatic epoxy lesosinol diglycidyl ether
  • the same polarizing plate as in Example 1 was prepared except that the adhesive composition was prepared, and the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 3.5.
  • a polarizing plate was prepared in the same manner as in Example 1 except that an adhesive composition was prepared by mixing 10 wt% of a ratio and 4 wt% of a radical photoinitiator Irg184 of Ciba, and the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 3.
  • a polarizing plate was manufactured in the same manner as in Example 1 except that the thickness of the adhesive was 5 ⁇ m.
  • a polarizing plate was manufactured in the same manner as in Example 1 except that the thickness of the adhesive was 1 ⁇ m.
  • a polarizing plate was used in the same manner as in Example 1, except that the polarizer of Preparation Example 2 was used as the polarizer, and the triacetyl cellulose-based film (FUJI) was bonded to the side where the polyvinyl alcohol-based resin layer was formed on both sides of the polarizer.
  • the polarizer of Preparation Example 2 was used as the polarizer, and the triacetyl cellulose-based film (FUJI) was bonded to the side where the polyvinyl alcohol-based resin layer was formed on both sides of the polarizer.
  • Example 2 The same polarizing plate as in Example 1 was prepared except that 10 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 90 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 9.
  • a polarizing plate was prepared in the same manner as in Example 1 except that 70 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 30 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 0.4.
  • Example 1 70% by weight of Daicel's alicyclic epoxy compound CEL 2021P, 20% by weight of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether, and 10% by weight of 1,2,7,8-diepoxyoctane
  • the same polarizing plate as that in Example 1 was prepared except that the composition was prepared, and the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound was 1: 0.4.
  • a polarizing plate was prepared in the same manner as in Example 1, except that 50 wt% of Daicel's alicyclic epoxy compound CEL 2021P and 50 wt% of Aldrich's linear aliphatic epoxy compound neopentyl glycol diglyceryl ether were prepared. At this time, the weight ratio of the alicyclic epoxy compound and the linear aliphatic epoxy compound is 1: 1.
  • the acrylic copolymer was polymerized with 70% by weight of butyl acrylate, 20% by weight of methyl acrylate, and 10% by weight of acrylic acid, and 15% by weight of the polyfunctional acrylate monomer and 0.3% by weight of the photopolymerization initiator (Irgacure500, Chiba Chemical Co., Ltd., an isocyanate crosslinking agent (Colonate L, Nippon Polyurethane Industry Co., Ltd.), and 0.1 wt% of a silane coupling agent (KBM-403, Shinnets Chemical Co., Ltd.) were added to prepare an acrylic pressure-sensitive adhesive composition.
  • the prepared pressure-sensitive adhesive composition was applied to a separator film having a thickness of 80 ⁇ m and dried to prepare an adhesive film having an acrylic pressure-sensitive adhesive layer having a thickness of 5 ⁇ m.
  • Example 2 The same polarizing plate as in Example 1 was prepared except that the PSA layer was repeatedly transcribed onto a ⁇ / 2 retardation layer of the composite retardation layer to form an acrylic pressure-sensitive adhesive layer having a thickness of 20 ⁇ m, and the ⁇ / 4 retardation layer was bonded thereon.
  • a polarizing plate similar to Comparative Example 6 was prepared except that the thickness of the acrylic pressure sensitive adhesive layer was 5 ⁇ m.
  • a polarizing plate was manufactured in the same manner as in Example 1 except that the thickness of the adhesive was 7 ⁇ m.
  • composition contents of Examples 1 to 14 are expressed in weight percent.
  • composition content of Comparative Examples 1 to 8 is expressed in weight%.
  • A-1 CEL 2021P (DIESEL Co., Ltd.)
  • the interlayer adhesion of the composite retardation layer (whether interlayer peeling) was tested according to the standard of ASTM D 3359 for the composite polarizing plates of the examples and comparative examples.
  • 11 cutting lines are inserted in the longitudinal and transverse directions at intervals of 1 mm on the surface of the composite retardation layer to form 100 eyes of 1 mm 2 , and then the cellophane tape is applied to the surface, and then the process of peeling is repeated three times. It carried out and counted the average peeling number, and evaluated according to the following criteria.
  • the prepared polarizing plate was attached to the glass using a film-type adhesive, and then a silver reflecting plate was attached to the opposite side of the polarizing plate attaching surface, and the light polarizing plate was put into an oven at 85 ° C. for 24 hours, and the light leakage of the polarizing plate was observed in the reflection mode in the dark room.
  • MIT evaluation Using a bending test apparatus (MIT evaluation), repeated bending experiments were performed with a width of 10 mm, a length of 150 mm, and a radius of 3 mm to observe cracking degree and peeling between layers of films during 50,000 repeated bending tests.
  • the examples are excellent in both Cross Cut, light leakage evaluation and bending evaluation, the comparative examples are not excellent in both Cross Cut, light leakage evaluation and bending evaluation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)

Abstract

La présente invention concerne une plaque polarisante complexe et, plus particulièrement, une plaque polarisante complexe comprenant : un polariseur ; et des couches à différence de phase complexe disposées sur au moins une surface du polariseur, et ayant, à partir du polariseur, une première couche à différence de phase, une couche adhésive photodurcissable, et une seconde couche à différence de phase qui sont empilées dans cet ordre, les couches à différence de phase complexe ayant de -514 à 275 d'une pente de rigidité par rapport à une température comprise entre 20 et 90°C, ce qui améliore les caractéristiques de flexion d'un afficheur et des caractéristiques d'adhésion entre des couches à différence de phase, améliore la rigidité des couches à différence de phase complexe, et améliore les caractéristiques de flexion de façon à présenter de bonnes caractéristiques de fuite de lumière.
PCT/KR2016/014231 2015-12-10 2016-12-06 Plaque polarisante complexe et dispositif d'affichage d'image la comprenant Ceased WO2017099449A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680067058.5A CN108291995B (zh) 2015-12-10 2016-12-06 复合偏光板及包含该复合偏光板的图像显示设备

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2015-0175846 2015-12-10
KR20150175846 2015-12-10
KR1020160129846A KR101783210B1 (ko) 2015-12-10 2016-10-07 복합 편광판 및 이를 포함하는 화상 표시 장치
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DE102023106296A1 (de) * 2023-03-14 2024-09-19 Carl Zeiss Ag Optisches System mit einer Klebstoffschicht mit einem Steifigkeitsgradienten

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JP2009244486A (ja) * 2008-03-31 2009-10-22 Toagosei Co Ltd 位相差一体型複合偏光板及びそれを用いた画像表示装置
JP2009258660A (ja) * 2008-03-24 2009-11-05 Fujifilm Corp 光学補償フィルム付き偏光板、液晶パネル、及び液晶表示装置
JP2013212657A (ja) * 2012-04-03 2013-10-17 Dainippon Printing Co Ltd トリアセチルセルロース積層体、これを用いた光学フィルム及び光学部材
KR20140076425A (ko) * 2012-12-12 2014-06-20 제일모직주식회사 편광판용 접착 필름, 이를 위한 접착제 조성물, 이를 포함하는 편광판 및 이를 포함하는 광학 표시 장치
KR20140147036A (ko) * 2013-06-18 2014-12-29 주식회사 엘지화학 편광판 및 이를 포함하는 화상표시장치

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JP2009258660A (ja) * 2008-03-24 2009-11-05 Fujifilm Corp 光学補償フィルム付き偏光板、液晶パネル、及び液晶表示装置
JP2009244486A (ja) * 2008-03-31 2009-10-22 Toagosei Co Ltd 位相差一体型複合偏光板及びそれを用いた画像表示装置
JP2013212657A (ja) * 2012-04-03 2013-10-17 Dainippon Printing Co Ltd トリアセチルセルロース積層体、これを用いた光学フィルム及び光学部材
KR20140076425A (ko) * 2012-12-12 2014-06-20 제일모직주식회사 편광판용 접착 필름, 이를 위한 접착제 조성물, 이를 포함하는 편광판 및 이를 포함하는 광학 표시 장치
KR20140147036A (ko) * 2013-06-18 2014-12-29 주식회사 엘지화학 편광판 및 이를 포함하는 화상표시장치

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DE102023106296A1 (de) * 2023-03-14 2024-09-19 Carl Zeiss Ag Optisches System mit einer Klebstoffschicht mit einem Steifigkeitsgradienten

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