WO2014112724A1 - Procédé de fabrication d'un filtre de polarisation - Google Patents

Procédé de fabrication d'un filtre de polarisation Download PDF

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Publication number
WO2014112724A1
WO2014112724A1 PCT/KR2013/011748 KR2013011748W WO2014112724A1 WO 2014112724 A1 WO2014112724 A1 WO 2014112724A1 KR 2013011748 W KR2013011748 W KR 2013011748W WO 2014112724 A1 WO2014112724 A1 WO 2014112724A1
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Prior art keywords
polarizer
film
crosslinking
polarizing plate
stretching
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PCT/KR2013/011748
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English (en)
Korean (ko)
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김준석
김민석
김나연
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동우화인켐 주식회사
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Publication of WO2014112724A1 publication Critical patent/WO2014112724A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers

Definitions

  • the present invention relates to a method for producing a polarizer.
  • Liquid crystal display device is one of the image display devices, and has the advantage of realizing light and small size and low power consumption compared to the cathode ray tube (CRT) which is a typical image display device. Since CRTs are not devices that emit light by themselves, unlike CRTs, they require light sources other than liquid crystal panels, and fluorescent lamps are mainly used as light sources for liquid crystal display devices. A first (lower plate) and a second polarizing plate (top plate) are attached, respectively, The first and second polarizing plates block or pass light from the lamp.
  • CTR cathode ray tube
  • the polarizing plate has a structure including a pressure-sensitive adhesive layer for bonding to a liquid crystal cell on one side of a laminate including a first polarizer protective film, a polarizer and a second polarizer protective film, and a surface protective film on the other side.
  • a polarizing plate having the same configuration as the upper polarizing plate and the lower polarizing plate may be bonded to both surfaces of the liquid crystal cell.
  • polarizing plates having different characteristics as upper and lower polarizing plates have been applied.
  • a polarizing plate having a wide viewing angle compensation film, a functional coating layer (hard coating layer, an antistatic layer, an antireflection layer, or the like), or a laminate thereof is applied to the upper polarizing plate in addition to the polarizer protective film on the viewing side of the polarizer.
  • the polarizing plate provided with the brightness improving film, a diffusion protective film, these laminated bodies, etc. are applied to the backlight unit side surface of a polarizer.
  • Functional films, coating layers or laminates for imparting these different properties have different physical properties such as material, thickness, stretching direction, and moisture permeability, respectively.
  • Conventional polarizers include a polyvinyl alcohol (PVA) film drawn in a direction and dyed with a dichroic dye as a polarizer, and the stretched PVA film shrinks in the stretching direction according to temperature or humidity change.
  • PVA polyvinyl alcohol
  • the shrinkage rate is increased due to the difference in their moisture permeability, which causes the liquid crystal panel to curl. The phenomenon occurs badly. As a result, light leakage may occur and cause a defect of the liquid crystal panel.
  • Korean Patent No. 679535 discloses a polarizer, a polarizing plate, and a liquid crystal display device using the same having a small dimensional change, but did not suggest an alternative to the problem.
  • An object of the present invention is to provide a method of manufacturing a polarizer capable of reducing the warpage and light leakage phenomenon of the liquid crystal panel.
  • Y is 0 to 3.8 N / 2 mm in shrinkage force of the polarizer; a is 1 N / (2 mm ° C.); X is 60 ° C. or lower in temperature of the crosslinking bath in the crosslinking step).
  • the stretching is a polarizer manufacturing method so that the thickness of the polarizer is 30 ⁇ m or less.
  • the manufacturing method of the polarizer applying a tension of 500 to 850N / m to the film for forming the polarizer in the drying step.
  • Polarizing plate comprising a polarizer prepared by the method of any one of 1 to 5 above.
  • Liquid crystal display including the polarizing plate of the above six.
  • the polarizer manufactured by the manufacturing method of the present invention may be applied to the liquid crystal display to reduce the warpage phenomenon, thereby improving the light leakage phenomenon of the liquid crystal display.
  • Equation 1 shows the range of Equation 1 of the present invention.
  • Figure 2 shows the degree of warpage of the polarizing plate prepared in Example 1.
  • Figure 3 shows the degree of warpage of the polarizing plate prepared in Example 2.
  • Figure 4 shows the degree of warpage of the polarizing plate prepared in Example 3.
  • Figure 5 shows the degree of warpage of the polarizing plate prepared in Example 4.
  • Figure 6 shows the degree of warpage of the polarizing plate prepared in Example 5.
  • Example 7 shows the degree of warpage of the polarizing plate prepared in Example 6.
  • the present invention includes the steps of swelling, dyeing, crosslinking, stretching and drying the film for polarizer formation;
  • the present invention relates to a method of manufacturing a polarizer that can be applied to a liquid crystal display to reduce warpage and improve light leakage.
  • the method for producing a polarizer of the present invention includes the steps of swelling, dyeing, crosslinking, stretching and drying the film for forming a polarizer; The following Equation 1 is satisfied:
  • Y is 0 to 3.8 N / 2 mm in shrinkage force of the polarizer; a is 1 N / (2 mm ° C.); X is 60 ° C. or lower in temperature of the crosslinking bath in the crosslinking step).
  • Equation 1 For reference, the range of Equation 1 is shown in FIG.
  • the present invention is due to the fact that when the relationship between the temperature of the crosslinking bath and the shrinkage force of the polarizer in the crosslinking step of the polarizer manufacturing process satisfies Equation 1 above, when applied to the liquid crystal display, the warpage phenomenon is reduced and the light leakage phenomenon is improved.
  • the method of adjusting the shrinkage force of the polarizer is not particularly limited, and may be controlled by process conditions such as a swelling tank dipping time, a crosslinking tank dipping time and an elongation ratio during the polarizer manufacturing process.
  • the shrinkage force of the polarizer in the present invention was measured using a TMA manufactured by TA instrument, and when the polarizer having a width of 2 mm and a length of 40 mm was heated at 80 ° C., it contracted in the absorption axis direction of the polarizer after 240 minutes from the start of heating. It is the value of force in terms of unit width.
  • the measurement was carried out by heating a polarizer with a width of 2 mm between two chucks having one side fixed and a chuck attached to the other so that the chuck was 40 mm (absorption axis direction) between the chucks and continuously heated at 80 ° C. for 240 minutes. This is done by reading the value indicated by the force gauge.
  • the polarizer may be prepared by a conventional method for manufacturing a polarizer known in the art within a range satisfying the above conditions, which includes swelling, dyeing, crosslinking, stretching and drying the film for forming a polarizer.
  • the order of each step, the number of repetitions, the process conditions and the like are not particularly limited as long as they do not depart from the object of the present invention.
  • the film for forming a polarizer is not particularly limited as long as it is a dichroic substance, that is, a film which can be dyed with iodine, and the like, for example, a polyvinyl alcohol film, a partially gumified polyvinyl alcohol film; Hydrophilic polymer films such as polyethylene terephthalate film, ethylene-vinyl acetate copolymer film, ethylene-vinyl alcohol copolymer film, cellulose film, partially gumified film thereof and the like; Or a polyene alignment film such as a dehydrated polyvinyl alcohol-based film, a dehydrochloric acid-treated polyvinyl alcohol-based film, or the like.
  • polyvinyl alcohol-based films are preferred in that they are excellent in effect of enhancing uniformity in polarization degree and excellent in dyeing affinity for iodine.
  • the thickness of the film for polarizer formation is not specifically limited, For example, it may be 40-80 micrometers.
  • the swelling step is immersed in a swelling tank filled with an swelling aqueous solution before dyeing the unstretched polarizer-forming film to remove impurities such as dirt or antiblocking agent deposited on the surface of the polarizer-forming film and to remove the polarizer-forming film. It is a step for improving the physical properties of the polarizer by swelling to improve the stretching efficiency and to prevent dye non-uniformity.
  • aqueous solution for swelling water (pure water, deionized water) can be usually used alone, and when a small amount of glycerin or potassium iodide is added thereto, the processability can be improved together with the swelling of the polymer film.
  • the content of glycerin and potassium iodide is not particularly limited, and may be, for example, 5 wt% or less and 10 wt% or less in the total weight of the aqueous solution for swelling.
  • the temperature of the swelling bath is not particularly limited, and may be, for example, 20 to 45 ° C, preferably 25 to 40 ° C.
  • the temperature of the swelling tank is in the above range, the stretching and dyeing efficiency is excellent after that, it is possible to prevent the expansion of the film due to excessive swelling.
  • the execution time (swelling tank dipping time) of the swelling step is not particularly limited, and may be, for example, 180 seconds or less, preferably 10 to 120 seconds, more preferably 20 to 60 seconds.
  • immersion time is within the above range, it is possible to suppress the film from being saturated due to excessive swelling, to prevent breakage due to softening of the film, and to uniformly adsorb iodine in the dyeing step, thereby improving polarization degree. .
  • the dyeing step is a step of adsorbing iodine to the polarizer-forming film by immersing the polarizer-forming film in a dye bath filled with a dichroic material, for example, an aqueous solution for dyeing including iodine.
  • a dichroic material for example, an aqueous solution for dyeing including iodine.
  • the dyeing aqueous solution may include water, a water-soluble organic solvent or a mixed solvent and iodine thereof.
  • the content of iodine may be 0.4 to 400 mmol / L in the total weight of the aqueous solution for dyeing, preferably 0.8 to 275 mmol / L, more preferably 1 to 200 mmol / L.
  • the aqueous solution for dyeing may further include iodide as a dissolution aid to improve dyeing efficiency.
  • the type of iodide is not particularly limited, and examples thereof include potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, and titanium iodide. Potassium iodide is preferred in view of its high solubility in water. These can be used individually or in mixture of 2 or more types.
  • the content of iodide is not particularly limited, and may be, for example, 0.01 to 10% by weight of the total weight of the aqueous solution for dyeing, and preferably 0.01 to 5% by weight.
  • the temperature of the dye bath is not particularly limited, for example, may be 5 to 42 °C, preferably 10 to 35 °C.
  • Immersion time of the film for polarizer formation in a dye bath is not specifically limited, For example, it may be 1 to 20 minutes, Preferably it may be 2 to 10 minutes.
  • the crosslinking step is a step of fixing the adsorbed iodine molecules by immersing the dyed polarizer-forming film in an aqueous solution for crosslinking in a crosslinking tank so that dyeability by physically adsorbed iodine molecules is not lowered by the external environment.
  • Dichroic dyes are not often eluted in a humid environment, but iodine is often dissolved or sublimed depending on the environment when the crosslinking reaction is unstable, and sufficient crosslinking reaction is required.
  • the aqueous solution for crosslinking includes boron compounds such as water, boric acid, and sodium borate, which are solvents, and may further include an organic solvent that is mutually soluble with water.
  • the content of the boron compound is not particularly limited, and may be, for example, 1 to 7% by weight of the total weight of the aqueous solution for crosslinking, and preferably 2 to 6% by weight.
  • the aqueous solution for crosslinking may further include at least one crosslinking agent selected from the group consisting of glyoxal and glutalaldehyde to improve the reactivity of the crosslinking reaction.
  • the content of the crosslinking agent is not particularly limited, and may be 1 to 10% by weight of the total weight of the aqueous solution for crosslinking, and preferably 2 to 6% by weight.
  • the aqueous solution for crosslinking may further include a small amount of iodide in order to obtain uniformity of polarization degree in the polarizer plane.
  • Iodide may be the same as used in the dyeing step.
  • the content of iodide is not particularly limited, and may be, for example, 0.05 to 15% by weight of the total weight of the aqueous solution for crosslinking, and preferably 0.5 to 11% by weight.
  • the weight ratio of the boron compound and iodide is not particularly limited, and may be, for example, 1: 0.1-3.5, and preferably 1: 0.5-2.5.
  • the aqueous solution for crosslinking may further include an alkali metal chloride to improve color durability of the polarizer produced.
  • An alkali metal chloride is not specifically limited, For example, lithium chloride, sodium chloride, potassium chloride, etc. are mentioned.
  • the content of the alkali metal chloride is not particularly limited, and may be included, for example, in a 0.22 to 4.5 molar ratio, preferably 0.3 to 3.0 molar ratio with respect to 1 mole of iodide.
  • the content of the alkali metal chloride is in the above range can be maximized the effect of improving color durability.
  • the temperature of the crosslinking bath is 60 ° C. or less, and preferably 50 to 60 ° C. in view of maximizing warpage and light leakage improvement effects when applied to the liquid crystal panel.
  • Immersion time of the film for polarizer formation in a crosslinking tank is not specifically limited, For example, it may be 1 second-15 minutes, Preferably it may be 5 second-10 minutes.
  • the order of the stretching step is not particularly limited, for example, may be performed before, after the dyeing step or after the crosslinking step, and may be performed simultaneously with one or more steps selected from the group consisting of a swelling step, a dyeing step and a crosslinking step. .
  • the thickness of the polarizer after stretching may be 30 ⁇ m or less, and preferably 10 to 25 ⁇ m. When the thickness of the polarizer after stretching is within the above range, it is excellent in optical properties such as polarization degree, it may have excellent durability.
  • the thickness of the polarizer is closely related to optical properties such as polarization degree of the manufactured polarizer and mechanical properties such as tensile strength. That is, stepwise stretching is performed to maintain optical and mechanical properties of the polarizer.
  • the cumulative draw ratio which is the product of the draw ratios in each step, is not particularly limited, and may be, for example, 4 to 5.8 times, and preferably 4.5 to 5.7 times. When the cumulative draw ratio is within the above range, a polarizer having low shrinkage force can be made.
  • the method of manufacturing a polarizer of the present invention may further include a washing step after the crosslinking step.
  • the washing step is a step of removing the unnecessary residue such as boric acid attached to the film for forming the polarizer in the previous steps by immersing the polarizer forming film completed crosslinking and stretching in the washing tank filled with the aqueous solution for washing.
  • the aqueous solution for washing may be water (deionized water), and iodide may be further added thereto.
  • iodide the same ones as used in the dyeing step can be used, and among them, it is preferable to use sodium iodide or potassium iodide.
  • the content of iodide is not particularly limited, and may be, for example, 0.1 to 10 parts by weight, and preferably 3 to 8 parts by weight of the total weight of the aqueous solution for washing.
  • the temperature of the washing tank is not particularly limited, and may be, for example, 10 to 60 ° C, and preferably 15 to 40 ° C.
  • the washing step may be omitted and may be performed whenever previous steps such as dyeing step, crosslinking step or stretching step are completed. In addition, it may be repeated one or more times, and the number of repetitions is not particularly limited.
  • the drying step is a step of obtaining a polarizer having excellent optical properties by drying the washed polyvinyl alcohol-based film and further improving the orientation of the iodine molecules dyed by neck-in by drying.
  • drying method methods such as natural drying, air drying, heat drying, far infrared drying, microwave drying, and hot air drying may be used. Recently, microwave drying for activating and drying only water in a film is newly used. Drying is mainly used. For example, hot air drying may be performed at 20 to 90 ° C. for 1 to 10 minutes.
  • the drying temperature is preferably low in order to prevent deterioration of the polarizer, more preferably 80 ° C. or less, and most preferably 60 ° C. or less.
  • the polarizer-forming film may be tensioned to prevent shrinkage again after stretching, and the tension is not particularly limited, but may be, for example, 500 to 850 N / m, preferably 500 to 600 N / m. Can be.
  • the tension is within the above range, defects due to wrinkles, film breakage, shrinkage, and the like can be reduced.
  • the present invention provides a polarizing plate in which a protective film is bonded to at least one surface of the polarizer.
  • the protective film is not particularly limited as long as the film is excellent in transparency, mechanical strength, thermal stability, moisture shielding, and isotropy.
  • polyester film such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate; Cellulose films such as diacetyl cellulose and triacetyl cellulose; Polycarbonate film; Acrylic films such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene films such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin-based film; Vinyl chloride film; Polyamide films such as nylon and aromatic polyamides; Imide film; Sulfone film; Polyether ketone film; Sulfided polyphenylene-based films; Vinyl alcohol film; Vinylidene chloride-based film; Vinyl butyral film; Allylate film; Polyoxymethylene film; Urethane film; Epoxy film; Silicone film etc. are mentioned.
  • the structure of the polarizing plate is not particularly limited, and various kinds of optical layers capable of satisfying required optical properties may be bonded onto the polarizer.
  • a structure in which a protective film for protecting the polarizer is bonded to at least one surface of the polarizer A structure in which a surface treatment layer such as a hard coating layer, an antireflection layer, an anti-sticking layer, a diffusion preventing layer, an anti-glare layer, or the like is bonded on at least one surface or a protective film of the polarizer; It may have a structure in which an alignment liquid crystal layer or another functional film is bonded on at least one surface of the polarizer or a protective film to compensate for a viewing angle.
  • a phase difference including a wavelength plate (including a ⁇ plate) such as an optical film, a reflector, a semi-transmissive plate, a 1/2 wave plate, or a quarter wave plate, such as a polarization conversion device used to form various image display devices
  • a wavelength plate including a ⁇ plate
  • the plate, the viewing angle compensation film, and the brightness enhancement film may be bonded to the optical layer.
  • a polarizing plate having a structure in which a protective film is bonded to one surface of a polarizer, the polarizing plate having a reflector or a semi-transmissive reflector bonded to a reflective film or a transflective polarizing plate on the bonded protective film;
  • An oval or circular polarizer having a retardation plate bonded thereto;
  • a wide viewing angle polarizer having a viewing angle compensation layer or a viewing angle compensation film bonded thereto;
  • the polarizing plate with which the brightness enhancement film was bonded is preferable.
  • the present invention provides a liquid crystal display device including a liquid crystal panel including the polarizing plate.
  • the structure of the liquid crystal display device is not particularly limited, and may be a structure including a liquid crystal cell commonly used in the art and the polarizing plates bonded to both surfaces of the liquid crystal cell.
  • the backlight unit for supplying light to the liquid crystal panel it may further include a control unit for controlling the image display of the liquid crystal panel.
  • pressure sensitive adhesives may be applied to one side of the polarizer.
  • the main polymer used for the pressure-sensitive adhesive is not particularly limited, acrylic polymer; Silicone-based polymers; Polyesters, polyurethanes, polyamides, polyethers; Fluoride and rubber polymers are mainly used.
  • an adhesive such as an acrylic adhesive is generally used, which is excellent in optical transparency, and has moderate cohesiveness and adhesion. In addition, it has low hygroscopicity, remarkable weather resistance and heat resistance in terms of durability. Such characteristics are important for suppressing bubble generation and peeling phenomenon due to moisture absorption.
  • the thickness of the adhesive layer may be appropriately determined depending on the purpose of use and rework, and may be, for example, 1 to 500 ⁇ m, preferably 5 to 200 ⁇ m, and more preferably 10 to 100 ⁇ m. Can be.
  • At least 99.9% saponification and 75 ⁇ thick transparent unstretched polyvinyl alcohol film (VF-PS, KURARAY Co., Ltd.) was swelled by immersion in water (deionized water) at 30 ° C and 3.5 mmol / L of iodine and potassium iodide 2
  • Dyeing was performed by immersion in an aqueous solution for dyeing at 30 ° C. containing% by weight.
  • the temperature of the crosslinking tank was 54 degreeC, and it immersed in the crosslinking aqueous solution containing 4.5 mol ratio of lithium chlorides with respect to 2 weight% of potassium iodide, 3.7 weight% of boric acid, and 1 mol of potassium iodide.
  • stretched stretched so that the total cumulative stretching ratio might be 5.4 times so that the thickness of a polyvinyl alcohol film might be set to 23 micrometers.
  • the polyvinyl alcohol film was applied for 4 minutes in a drying furnace at 70 ° C. under a tension of 850 N / m to prepare a polarizer.
  • the polarizer was prepared by bonding a triacetyl cellulose film having a thickness of 23 ⁇ m to both sides of the polarizer with an acrylic adhesive.
  • the polarizer was produced by the same method as Example 1, and the polarizing plate was produced from this.
  • a polarizer was prepared in the same manner as in Example 1 except that the temperature of the crosslinking bath was applied to the film at 55 ° C. in a drying furnace to 500 N / m, thereby preparing a polarizer.
  • a polarizer was prepared in the same manner as in Example 1 except that the temperature of the crosslinking bath was set at 57 ° C. and the tension applied to the film in a drying furnace was 500 N / m, to thereby prepare a polarizer.
  • a polarizer was produced in the same manner as in Example 1 except that the temperature of the crosslinking bath was 58 ° C. and the tension applied to the film in the drying furnace was 500 N / m, to thereby prepare a polarizer.
  • a polarizer was prepared in the same manner as in Example 1 except that the stretching was performed so that the cumulative stretching ratio was 5 times, and the temperature of the crosslinking tank was 58 ° C. and the tension applied to the film in the drying furnace was 500 N / m. .
  • a polarizer was prepared in the same manner as in Example 1 except that the stretching was carried out so that the cumulative stretching ratio was 4.5 times, and the temperature of the crosslinking bath was 58 ° C. and the tension applied to the film in the drying furnace was 500 N / m. .
  • a polarizer was manufactured in the same manner as in Example 1 except that the total cumulative draw ratio was 6 times, and a polarizing plate was prepared therefrom.
  • Specimens were prepared at 2 mm in width and 40 mm in length with the polarizers prepared in Examples and Comparative Examples, and after heating at 80 ° C. for 240 minutes, shrinkage was measured by TMA. The measurement results are shown in Table 1 below.
  • Example 1 The maximum value of the deflection degree of the polarizing plates manufactured by the Example and the comparative example was measured using the two-dimensional measuring instrument of INTEK IMS. The measurement results are shown in Table 1, FIG. 2 (Example 1), FIG. 3 (Example 2), FIG. 4 (Example 3), FIG. 5 (Example 4), FIG. 6 (Example 5), and FIG. 7 ( Example 6), FIG. 8 (Example 7) and FIG. 9 (Comparative Example).

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Abstract

La présente invention concerne un procédé de fabrication d'un filtre de polarisation, et plus spécifiquement un procédé de fabrication d'un filtre de polarisation qui comprend les étapes consistant à faire gonfler, à colorer, à réticuler, à étirer et à faire sécher un film pour former le filtre de polarisation, ce dernier pouvant être appliqué sur un afficheur à cristal liquide afin de réduire la déviation et les fuites de lumière, en repectant la formule mathématique 1.
PCT/KR2013/011748 2013-01-21 2013-12-17 Procédé de fabrication d'un filtre de polarisation WO2014112724A1 (fr)

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KR1020130006310A KR20140094092A (ko) 2013-01-21 2013-01-21 편광자의 제조 방법

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KR102024248B1 (ko) * 2017-07-14 2019-09-23 주식회사 엘지화학 편광판

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100679535B1 (ko) * 2000-06-19 2007-02-07 닛토덴코 가부시키가이샤 편광자, 편광판 및 그것을 사용한 액정 표시 장치
KR20090027584A (ko) * 2007-09-12 2009-03-17 스미또모 가가꾸 가부시키가이샤 편광 필름, 편광 필름의 제조방법, 및 편광판의 제조방법
JP2009104062A (ja) * 2007-10-25 2009-05-14 Sumitomo Chemical Co Ltd 偏光フィルム、その製造方法および偏光板
KR20090070069A (ko) * 2007-12-26 2009-07-01 주식회사 에이스 디지텍 편광판의 제조방법 및 그를 이용하여 제조된 편광판
KR100978951B1 (ko) * 2003-12-05 2010-08-31 엘지디스플레이 주식회사 액정표시장치용 액정패널

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100679535B1 (ko) * 2000-06-19 2007-02-07 닛토덴코 가부시키가이샤 편광자, 편광판 및 그것을 사용한 액정 표시 장치
KR100978951B1 (ko) * 2003-12-05 2010-08-31 엘지디스플레이 주식회사 액정표시장치용 액정패널
KR20090027584A (ko) * 2007-09-12 2009-03-17 스미또모 가가꾸 가부시키가이샤 편광 필름, 편광 필름의 제조방법, 및 편광판의 제조방법
JP2009104062A (ja) * 2007-10-25 2009-05-14 Sumitomo Chemical Co Ltd 偏光フィルム、その製造方法および偏光板
KR20090070069A (ko) * 2007-12-26 2009-07-01 주식회사 에이스 디지텍 편광판의 제조방법 및 그를 이용하여 제조된 편광판

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