WO2010151036A2 - Antiglare film, and polarizing plate and display device comprising same - Google Patents

Antiglare film, and polarizing plate and display device comprising same Download PDF

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Publication number
WO2010151036A2
WO2010151036A2 PCT/KR2010/004058 KR2010004058W WO2010151036A2 WO 2010151036 A2 WO2010151036 A2 WO 2010151036A2 KR 2010004058 W KR2010004058 W KR 2010004058W WO 2010151036 A2 WO2010151036 A2 WO 2010151036A2
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WO
WIPO (PCT)
Prior art keywords
glare
film
coating composition
antiglare
resin
Prior art date
Application number
PCT/KR2010/004058
Other languages
French (fr)
Korean (ko)
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WO2010151036A3 (en
Inventor
홍승모
임거산
김태욱
Original Assignee
동우화인켐 주식회사
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Publication of WO2010151036A2 publication Critical patent/WO2010151036A2/en
Publication of WO2010151036A3 publication Critical patent/WO2010151036A3/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
    • B05D1/005—Spin coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter

Definitions

  • the present invention relates to an antiglare film, a polarizing plate having the same, and a display device.
  • the anti-glare film has a function of reducing reflection of external light by using diffuse reflection by surface protrusions, and various display panels such as liquid crystal display (LCD), plasma display (PDP), CRT, and electroluminescent display (EL). It is used for the purpose of preventing the reduction of the contrast due to the reflection of external light or the deterioration of the visibility of the display due to the reflection of the image.
  • LCD liquid crystal display
  • PDP plasma display
  • EL electroluminescent display
  • the antiglare film is generally formed by coating an antiglare coating composition containing a filler such as silica or resin particles on the surface of a transparent substrate.
  • a filler such as silica or resin particles
  • surface unevenness is formed on the surface of the anti-glare layer by agglomeration of silica or the like, and the unevenness is formed on the surface by controlling the thickness of the filler.
  • the conventional anti-glare film has a disadvantage of severe reflection of external light when the surface irregularities are severe, excellent anti-glare, but the sharpness of the displayed image is inferior.
  • the surface unevenness of the conventional antiglare film is weak, the external light cannot be sufficiently diffused, and thus the antiglare property inherent in the antiglare film is inferior, and thus, the visibility of the displayed screen is greatly deteriorated.
  • the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide an anti-glare film having excellent anti-glare property and improved transmission clarity.
  • Another object of the present invention is to provide a polarizing plate and a display device including the anti-glare film.
  • the present invention for achieving the above object is an anti-glare film comprising a transparent substrate and an anti-glare layer formed by coating the anti-glare coating composition on one side or both sides of the transparent substrate, the anti-glare coating composition is a multi-functional ( It is made of a light-transmissive resin containing a meth) acrylate, a curable resin containing a photoinitiator and a solvent and a resin particle, wherein the resin particles have a refractive index difference of 0.03 to 0.2 after the curable resin is cured, the anti-glare layer
  • the anti-glare coating composition provides an anti-glare film, characterized in that the coating is formed so that the surface roughness Ra value is 0.05um to 0.2um.
  • the anti-glare film preferably has an internal haze of at least 2%, reflection clarity of 150 or less, and transmission clarity of 200 or more.
  • the said resin particle is 1-10 micrometers in average particle diameter.
  • the resin particles are preferably contained in 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
  • the anti-glare coating composition may further include conductive fine particles.
  • the anti-glare film may further include a low refractive index layer in the range of refractive index 1.25 to 1.45.
  • the present invention provides a polarizing plate comprising the anti-glare film described above.
  • this invention also provides the display apparatus characterized by including the anti-glare film mentioned above.
  • the anti-glare film according to the present invention described above exhibits low reflection sharpness and excellent transmission clarity while having excellent anti-glare property. Therefore, the anti-glare film according to the present invention can be usefully applied to the polarizing plate and the display device.
  • the antiglare film according to the present invention comprises a transparent base material and an antiglare layer formed by coating an antiglare coating composition on one or both surfaces of the transparent base material.
  • the anti-glare coating composition is made of a light-transmissive resin containing a polyfunctional (meth) acrylate, a curable resin and a resin particle comprising a photoinitiator and a solvent, the resin particles are different in refractive index after curing of the curable resin 0.03 to 0.2, and the antiglare layer is formed by coating the antiglare coating composition such that a surface roughness Ra value is 0.05 um to 0.2 um.
  • an anti-glare film satisfying the two optical characteristics can be obtained at the same time.
  • the anti-glare coating composition of the present invention consists of a curable resin and resin particles containing a light-transmissive resin, a photoinitiator and a solvent.
  • the resin particles are those having a refractive index difference of 0.03 to 0.20 and a refractive index after curing of the curable resin in order to enable the antiglare film according to the present invention to simultaneously obtain high antiglare properties and transmission clarity.
  • the difference in refractive index is a preferable range to satisfy both high anti-glare and high transmission clarity which are the objects of the present invention. That is, when the resin particles having a refractive index difference of less than 0.03 after curing of the curable resin are used, the scattering inside the antiglare layer is small, so that surface irregularities must be increased to obtain sufficient antiglare property, which leads to a decrease in the transmission sharpness. do.
  • the resin particles having a refractive index difference of more than 0.20 after curing of the curable resin are used, the internal scattering becomes sharp and the haze rises, which causes a decrease in the transmission sharpness.
  • Melamine resin particles acrylic resin particles, acrylic-styrene resin particles, polycarbonate resin particles, polyethylene resin particles, vinyl chloride resin particles and the like may be used as the resin particles.
  • the resin particles exemplified above may be used alone or in combination of two or more thereof.
  • the average particle diameter of the said resin particle is 1-10 micrometers.
  • the average particle diameter of the resin particles is 1 ⁇ m or less, it is difficult to form surface irregularities on the light-transmissive resin layer, so that the anti-glare property is not exhibited.
  • 10 ⁇ m or more the surface of the anti-glare layer becomes rough and the haze value increases significantly. There is this.
  • the resin particles are preferably contained 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
  • the said resin particle is less than 0.5 weight part on the said reference
  • the curable resin includes a light transmitting resin, a photoinitiator and a solvent.
  • the light transmissive resin contains a polyfunctional (meth) acrylate.
  • the multifunctional (meth) acrylate include dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, pentaerythritol tetra (meth) acrylate, and ditrimethylolpropane tetra (meth) acrylic acid.
  • the said translucent resin contains at least 1 sort (s) of the polyfunctional (meth) acrylate illustrated above.
  • the light-transmissive resin is not particularly limited, but is preferably contained 10 to 90 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
  • the content of the light-transmitting resin is included in the range of 10 to 90 parts by weight based on the above standards it is preferable because it shows excellent anti-glare property.
  • the photoinitiator may be used without limitation as long as it is used in the art.
  • Specific examples of the photoinitiator include 2-methyl-1- [4- (methylthio) phenyl] 2-morpholinepropanone-1, diphenyl ketone benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenyl- 1-one, 4-hydroxycyclophenylketone, dimethoxy-2-phenylacetophenone, anthraquinone, fluorene, triphenylamine, carbazole, 3-methylacetophenone, 4-chloroacetophenone, 4,4- At least one selected from the group consisting of dimethoxyacetophenone, 4,4-diaminobenzophenone and 1-hydroxycyclohexylphenyl ketone can be used.
  • the photoinitiator is preferably included 0.1 to 10 parts by weight based on 100 parts by weight of the total anti-glare coating composition of the present invention.
  • the photoinitiator is contained less than 0.1 parts by weight, the curing rate is slow, and when it is included more than 10 parts by weight, the polymer chain may be shortened due to overcuring and cracks may occur in the antiglare layer.
  • a photostimulant may be used together with the photoinitiator.
  • the photo-stimulating agent for example, triethylamine, diethylamine, methyl diethanolamine, ethanolamine, 4-dimethylamino-benzoic acid, isoamyl-4-dimethylaminobenzoate and the like can be used.
  • the amount of the photostimulant is not necessarily limited, 0.5 to 50 parts by weight may be added based on 100 parts by weight of the total amount of the photoinitiator.
  • the solvent can be used without limitation to those known in the art.
  • Specific examples of the solvent include alcohols (methanol, ethanol, isopropanol, butanol, methoxypropanol, etc.) or ketones (methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, dipropyl ketone, etc.). It can be used preferably.
  • the curable resin may further be used an organic-inorganic hybrid silica commonly used in the art.
  • organic-inorganic hybrid silica include those produced by chemically bonding a polyfunctional silane compound containing a polyfunctional (meth) acrylate to a hydroxy group on a silica surface.
  • the organic-inorganic hybrid silica is not limited, but it is preferable to use 5 to 50 parts by weight based on 100 parts by weight of the antiglare coating composition.
  • the organic-inorganic hybrid silica is added within the above range, there is an advantage of reducing curling of the coating film by reducing shrinkage due to curing.
  • the curable resin may further include conductive fine particles to impart an antistatic function to the antiglare coating composition.
  • the conductive fine particles are conductive metal fine particles such as ATO, ITO, SnO 2 , Sb 2 O 5 , I 2 O 3 , Au, In 2 O 3 or conductive such as polythiophene, polyacetylene, polyaniline, polypyrrole Polymers may additionally be used.
  • the conductive fine particles may be prepared by chemically bonding a multifunctional silane compound containing a polyfunctional (meth) acrylate on the surface.
  • the conductive fine particles are not particularly limited but are preferably included in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
  • the content of the conductive fine particles is less than 0.5 parts by weight based on the above standard, the antistatic function is not exerted, and when the content exceeds 10 parts by weight, the transmittance is lowered.
  • the curable resin according to the present invention may additionally include antioxidants, UV absorbers, light stabilizers, thermal polymerization inhibitors, labelling agents, surfactants, lubricants, antifouling agents and the like commonly used in anti-glare coating composition.
  • the transparent substrate will be described in detail as follows.
  • the transparent base material is a plastic film with transparency, any thing can be used.
  • the transparent base material include cycloolefin derivatives and cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate and isobutyl having units of monomers including cycloolefin such as norbornene or polycyclic norbornene monomer).
  • a uniaxial or biaxially stretched polyester film having excellent transparency and heat resistance a cycloolefin-based derivative film, polymethyl methacrylate film, and transparency capable of coping with the enlargement of the film, having excellent transparency and heat resistance, among the transparent substrates exemplified above.
  • the triacetyl cellulose and the isobutyl ester cellulose films are more preferable in that they are not optically anisotropic.
  • the thickness of the said transparent base material is not specifically limited, It is preferable that it is 8-1000 micrometers, and it is more preferable that it is 40-100 micrometers. If the thickness of the transparent base film is 8 ⁇ m or less, the film strength is lowered, resulting in poor workability. If the thickness is 1000 ⁇ m or more, transparency may be reduced or the weight of the polarizing plate may increase.
  • the anti-glare film according to the present invention includes an anti-glare layer formed by coating the anti-glare coating composition described above on the transparent substrate.
  • the coating of the anti-glare coating composition may be coated by a suitable method such as die coater, air knife, reverse roll, spray, blade, casting, gravure, micro gravure or spin coating.
  • the anti-glare coating composition such that the surface roughness Ra after curing is 0.05 um to 0.2 um. If the surface roughness is greater than 0.2 ⁇ m, the anti-glare property is excellent due to the surface irregularities, but there is a disadvantage in that the transmission sharpness is lowered. In the case where the surface roughness is less than 0.05, the reflection sharpness is increased to reduce the anti-glare property.
  • the coating thickness of the said anti-glare coating composition is not necessarily limited, it is usually 3-50 micrometers, Preferably it is 5-40 micrometers, More preferably, it is 5-35 micrometers.
  • the anti-glare coating composition applied to the transparent substrate is dried by evaporating the volatiles for 10 seconds to 2 hours, more preferably 30 seconds to 1 hour at a temperature of 30 to 150 °C. After curing by irradiation with UV light. It is preferable that it is about 0.01-10J / cm ⁇ 2>, and, as for the irradiation amount of the said UV light, it is more preferable that it is 0.1-2J / cm ⁇ 2>.
  • the anti-glare film has an internal haze of at least 2%, a reflection clarity of 150 or less, and a transmission clarity of 200 or more, so that excellent anti-glare property and excellent reflection clarity and transmission clarity can be obtained.
  • the anti-glare film may further include a low refractive layer on one surface.
  • the low refractive index layer may be formed by applying generally used in the art, preferably, the low refractive layer may be made of fluorine, silica, or porous.
  • the low refractive index layer preferably has a refractive index range of 1.25 to 1.45.
  • the refractive index of the low refractive index layer is lower than 1.25, the strength at the time of coating is weak, and when the refractive index is higher than 1.45, the difference in refractive index with the antiglare coating layer is not large and the antireflection effect is not sufficiently exhibited.
  • the present invention provides a polarizing plate provided with the antiglare film.
  • the polarizing plate may be formed by stacking an antiglare film according to the present invention on at least one surface.
  • the polarizing plate is not particularly limited, and various kinds may be used.
  • the polarizing plate include dichroic substances such as iodine or dichroic dye in hydrophilic polymer films such as a polyvinyl alcohol-based (PVA) film or an ethylene-vinyl acetate (EVA) copolymerized partially saponified film providing a polarizing function.
  • the polyene type orientation film such as the film which adsorb
  • the polarizing plate which consists of dichroic substances, such as a polyvinyl alcohol-type film and iodine, is preferable.
  • the present invention also provides a display device provided with the antiglare film.
  • the display device excellent in visibility can be manufactured by embedding the polarizing plate with an anti-glare film of this invention in a display device.
  • the anti-glare film of this invention can also be made to adhere to the window of a display apparatus.
  • Anti-glare film of the present invention is reflective, transmissive, semi-transmissive LCD or TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, OCB (Optical Compensation Bend) type, HAN type, VA (Vertical Alignment) type, IPS ( It can be preferably used for LCDs of various driving methods such as In Plain Switching).
  • the anti-glare film of the present invention can be preferably used for various display devices such as a plasma display, a field emission display, an organic EL display, an inorganic EL display, and an electronic paper.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having a refractive index of 1.43 parts were dispersed in 8.25 parts by weight of methyl ethyl ketone, and then containing a translucent resin, a solvent, an initiator, and an organic-inorganic hybrid silica. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour.
  • curable resin DN-0081, manufactured by JSR
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.13 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • silicone resin fine particles (Tospearl145, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 4.5 um with a refractive index of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, followed by dispersion. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR), and stirred for 1 hour.
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.11 ⁇ m, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour.
  • curable resin EC190-03, manufactured by Kriya
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having an index of refraction of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, and then dispersed. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour.
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated to have a surface roughness Ra of 0.25 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having an index of refraction of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, and then dispersed. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour.
  • the anti-glare coating composition obtained by stirring was dried on a transparent base film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.04 ⁇ m, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour.
  • curable resin EC190-03, manufactured by Kriya
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.28 ⁇ m, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour.
  • curable resin EC190-03, manufactured by Kriya
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.03 ⁇ m, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • the anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 ⁇ m, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2.
  • An antiglare film was prepared.
  • Total light transmittance and total haze were measured using a spectrophotometer (HZ-1, manufactured by Suga Corporation, Japan).
  • the anti-glare films of Examples 1 to 4 in which the refractive index difference and the surface roughness Ra of the resin particles and the curable resin after curing were included in the scope of the present invention, all exhibited low reflection sharpness as compared to the anti-glare film of the comparative example. It can be seen that while exhibiting anti-glare property, it also exhibits high transmission clarity.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The present invention relates to an antiglare film comprising an antiglare layer formed by applying an antiglare coating composition onto a transparent base member, wherein said antiglare coating composition consists of a light-transmitting resin, a curable resin containing a photoinitiator and a solvent, and resin particles. The present invention also relates to a polarizing plate and to a display device comprising the antiglare film. The antiglare film according to the present invention is to be disposed on the front surfaces of a variety of displays to diffuse light reflected by the displays. Thus, the antiglare film of the present invention has superior antiglare properties and excellent transmission clarity, and maintains a unique clarity of images being displayed on the displays, and therefore can be valuably used in a polarizing plate and in a display device.

Description

방현 필름, 이를 구비한 편광판 및 표시 장치Anti-glare film, polarizing plate and display device having same
본 발명은 방현 필름, 이를 구비한 편광판 및 표시 장치에 관한 것이다.The present invention relates to an antiglare film, a polarizing plate having the same, and a display device.
방현 필름은 표면 돌출부에 의한 난반사를 이용하여 외부 광의 반사를 감소시키는 기능을 갖는 것으로서 각종 디스플레이 패널, 예를 들면 액정 디스플레이(LCD), 플라스마 디스플레이(PDP), 브라운관(CRT), 전자발광 디스플레이(EL) 등의 표면에 배치되어 외부광의 반사로 인한 콘트라스트의 감소를 방지하거나 이미지 반사에 의한 디스플레이의 시인성 저하를 방지하는 등의 목적으로 이용되고 있다.The anti-glare film has a function of reducing reflection of external light by using diffuse reflection by surface protrusions, and various display panels such as liquid crystal display (LCD), plasma display (PDP), CRT, and electroluminescent display (EL). It is used for the purpose of preventing the reduction of the contrast due to the reflection of external light or the deterioration of the visibility of the display due to the reflection of the image.
상기 방현 필름은 일반적으로 투명 기재의 표면에 실리카 또는 수지 입자와 같은 충전재를 함유하는 방현성 코팅 조성물을 코팅하여 형성된다. 상기 방현 필름 코팅되는 방현성 코팅 조성물에 따라 실리카 등의 응집에 의해 방현층의 표면에 표면 요철이 형성된 것과, 충전재의 두께조절을 통해 표면에 요철을 형성한 것 등이 있다.The antiglare film is generally formed by coating an antiglare coating composition containing a filler such as silica or resin particles on the surface of a transparent substrate. According to the anti-glare coating composition to be coated with the anti-glare film, surface unevenness is formed on the surface of the anti-glare layer by agglomeration of silica or the like, and the unevenness is formed on the surface by controlling the thickness of the filler.
그러나, 종래의 방현 필름은 표면 요철이 심한 경우 외부 광의 난반사가 심하여, 방현성은 뛰어나나 디스플레이 되는 화상의 선명도는 떨어지는 단점이 있다. 반대로 종래의 방현 필름의 표면 요철이 약한 경우는 외부 광을 충분히 난반사 시키지 못하여 방현 필름 고유의 목적인 방현성이 떨어지게 되며, 이로 인해 디스플레이 되는 화면의 시인성이 크게 저하되는 단점이 있다.However, the conventional anti-glare film has a disadvantage of severe reflection of external light when the surface irregularities are severe, excellent anti-glare, but the sharpness of the displayed image is inferior. On the contrary, when the surface unevenness of the conventional antiglare film is weak, the external light cannot be sufficiently diffused, and thus the antiglare property inherent in the antiglare film is inferior, and thus, the visibility of the displayed screen is greatly deteriorated.
본 발명은 상기한 종래의 문제점을 해결하기 위한 것으로, 방현성이 우수하면서 투과 선명도가 향상된 방현 필름을 제공하는데 그 목적이 있다. The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide an anti-glare film having excellent anti-glare property and improved transmission clarity.
또한 본 발명은 상기 방현 필름을 포함하는 편광판 및 표시 장치를 제공하는데 다른 목적이 있다.Another object of the present invention is to provide a polarizing plate and a display device including the anti-glare film.
상기 목적을 달성하기 위한 본 발명은 투명 기재와, 상기 투명 기재의 일면 또는 양면에 방현성 코팅 조성물을 코팅하여 형성한 방현층을 포함하여 이루어지는 방현 필름에 있어서, 상기 방현성 코팅 조성물은 다관능(메타)아크릴레이트를 포함하는 투광성 수지, 광개시제 및 용제를 포함하는 경화성 수지와 수지 입자로 이루어지며, 상기 수지 입자는 상기 경화성 수지가 경화된 후와의 굴절률 차이가 0.03 내지 0.2이며, 상기 방현층은 상기 방현성 코팅 조성물을 표면 거칠기 Ra 값이 0.05um 내지 0.2um가 되도록 코팅하여 형성한 것을 특징으로 하는 방현 필름을 제공한다. The present invention for achieving the above object is an anti-glare film comprising a transparent substrate and an anti-glare layer formed by coating the anti-glare coating composition on one side or both sides of the transparent substrate, the anti-glare coating composition is a multi-functional ( It is made of a light-transmissive resin containing a meth) acrylate, a curable resin containing a photoinitiator and a solvent and a resin particle, wherein the resin particles have a refractive index difference of 0.03 to 0.2 after the curable resin is cured, the anti-glare layer The anti-glare coating composition provides an anti-glare film, characterized in that the coating is formed so that the surface roughness Ra value is 0.05um to 0.2um.
상기 방현 필름은 내부 헤이즈가 적어도 2%이고, 반사 선명도가 150 이하이고, 투과 선명도 200이상인 것이 바람직하다. The anti-glare film preferably has an internal haze of at least 2%, reflection clarity of 150 or less, and transmission clarity of 200 or more.
상기 수지 입자는 평균 입경이 1 내지 10㎛인 것이 바람직하다.It is preferable that the said resin particle is 1-10 micrometers in average particle diameter.
또한, 상기 수지 입자는 상기 방현성 코팅 조성물 전체 100중량부에 대하여 0.5 내지 20중량부 포함되는 것이 바람직하다.In addition, the resin particles are preferably contained in 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
상기 방현성 코팅 조성물은 전도성 미립자를 더 포함할 수 있다. The anti-glare coating composition may further include conductive fine particles.
상기 방현 필름은 굴절률 1.25 내지 1.45 범위의 저굴절층을 더 포함할 수 있다. The anti-glare film may further include a low refractive index layer in the range of refractive index 1.25 to 1.45.
본 발명의 다른 목적을 달성하기 위하여 본 발명은 전술한 방현 필름을 구비한 것을 특징으로 하는 편광판을 제공한다.In order to achieve another object of the present invention, the present invention provides a polarizing plate comprising the anti-glare film described above.
본 발명의 다른 목적을 달성하기 위하여 본 발명은 또한, 전술한 방현 필름을 구비한 것을 특징으로 하는 표시 장치를 제공한다.In order to achieve the other object of this invention, this invention also provides the display apparatus characterized by including the anti-glare film mentioned above.
상기한 본 발명에 따른 방현 필름은 낮은 반사 선명도를 나타내어 우수한 방현성을 지니면서도 우수한 투과 선명도를 나타낸다. 따라서 본 발명에 따른 방현 필름은 편광판 및 표시 장치에 유용하게 적용될 수 있다.The anti-glare film according to the present invention described above exhibits low reflection sharpness and excellent transmission clarity while having excellent anti-glare property. Therefore, the anti-glare film according to the present invention can be usefully applied to the polarizing plate and the display device.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에 따른 방현 필름은 투명 기재와, 상기 투명 기재의 일면 또는 양면에 방현성 코팅 조성물을 코팅하여 형성한 방현층을 포함하여 이루어진다. 이때 상기 방현성 코팅 조성물은 다관능(메타)아크릴레이트를 포함하는 투광성 수지, 광개시제 및 용제를 포함하는 경화성 수지와 수지 입자로 이루어지며, 상기 수지 입자는 상기 경화성 수지의 경화 후와의 굴절률 차이가 0.03 내지 0.2이며, 상기 방현층은 상기 방현성 코팅 조성물을 표면 거칠기 Ra 값이 0.05um 내지 0.2um가 되도록 코팅하여 형성된다. The antiglare film according to the present invention comprises a transparent base material and an antiglare layer formed by coating an antiglare coating composition on one or both surfaces of the transparent base material. At this time, the anti-glare coating composition is made of a light-transmissive resin containing a polyfunctional (meth) acrylate, a curable resin and a resin particle comprising a photoinitiator and a solvent, the resin particles are different in refractive index after curing of the curable resin 0.03 to 0.2, and the antiglare layer is formed by coating the antiglare coating composition such that a surface roughness Ra value is 0.05 um to 0.2 um.
즉, 본 발명에서는 방현성과 투과 선명도를 동시에 높이기 위하여 방현층을 형성하는 방현성 코팅 조성물과 방현층의 코팅 형상을 동시에 조정함으로써, 상기 두 가지 광학적 특성을 동시에 만족하는 방현 필름을 얻을 수 있다.That is, in the present invention, by simultaneously adjusting the anti-glare coating composition for forming the anti-glare layer and the coating shape of the anti-glare layer in order to simultaneously increase the anti-glare and transmission clarity, an anti-glare film satisfying the two optical characteristics can be obtained at the same time.
먼저 본 발명에 따른 방현성 코팅 조성물을 설명하면 다음과 같다.First, the anti-glare coating composition according to the present invention will be described.
본 발명의 방현성 코팅 조성물은 투광성 수지, 광개시제 및 용제를 포함하는 경화성 수지와 수지 입자로 이루어진다. The anti-glare coating composition of the present invention consists of a curable resin and resin particles containing a light-transmissive resin, a photoinitiator and a solvent.
상기 수지 입자는 본 발명에 따른 방현 필름이 높은 방현성과 투과 선명도를 동시에 얻을 수 있도록 하기 위하여 상기 경화성 수지의 경화 후와의 굴절률과 0.03 내지 0.20의 굴절률 차이를 갖는 것을 사용한다. 상기 굴절률 차이는 본 발명의 목적인 높은 방현성과 높은 투과 선명도를 동시에 만족시키기 위해 바람직한 범위이다. 즉 상기 수지 입자로 상기 경화성 수지의 경화 후와의 굴절률 차이가 0.03 미만인 것을 사용하게 되면 방현층 내부의 산란이 적어 충분한 방현성을 얻기 위해서는 표면요철을 증가시켜야 하며, 이는 곧 투과 선명도의 저하로 이어지게 된다. 상기 수지 입자로 경화성 수지의 경화 후와의 굴절률 차이가 0.20을 초과하는 것을 사용하게 되면 내부 산란이 극명하여, 헤이즈 상승이 두드러지며, 이는 투과선명도의 저하를 가져오게 된다. The resin particles are those having a refractive index difference of 0.03 to 0.20 and a refractive index after curing of the curable resin in order to enable the antiglare film according to the present invention to simultaneously obtain high antiglare properties and transmission clarity. The difference in refractive index is a preferable range to satisfy both high anti-glare and high transmission clarity which are the objects of the present invention. That is, when the resin particles having a refractive index difference of less than 0.03 after curing of the curable resin are used, the scattering inside the antiglare layer is small, so that surface irregularities must be increased to obtain sufficient antiglare property, which leads to a decrease in the transmission sharpness. do. When the resin particles having a refractive index difference of more than 0.20 after curing of the curable resin are used, the internal scattering becomes sharp and the haze rises, which causes a decrease in the transmission sharpness.
상기 수지 입자로는 멜라민계 수지 입자, 아크릴계 수지 입자, 아크릴-스티렌계 수지 입자, 폴리카보네이트계 수지 입자, 폴리에틸렌계 수지 입자, 염화비닐계 수지 입자 등을 사용 할 수 있다. 상기 예시된 수지 입자들은 단독 또는 2종 이상을 혼합하여 사용할 수 있다.Melamine resin particles, acrylic resin particles, acrylic-styrene resin particles, polycarbonate resin particles, polyethylene resin particles, vinyl chloride resin particles and the like may be used as the resin particles. The resin particles exemplified above may be used alone or in combination of two or more thereof.
상기 수지 입자의 평균 입경은 1 내지 10㎛인 것이 바람직하다. 상기 수지 입자의 평균 입경이 1㎛ 이하인 경우에는 투광성 수지층에 표면 요철을 형성하기가 어려워 방현성이 발휘되지 않으며, 10㎛ 이상인 경우에는 방현층의 표면이 거칠어지는 동시에 헤이즈 값이 크게 상승하는 단점이 있다. It is preferable that the average particle diameter of the said resin particle is 1-10 micrometers. When the average particle diameter of the resin particles is 1 μm or less, it is difficult to form surface irregularities on the light-transmissive resin layer, so that the anti-glare property is not exhibited. When 10 μm or more, the surface of the anti-glare layer becomes rough and the haze value increases significantly. There is this.
또한 상기 수지 입자는 상기 방현성 코팅 조성물 전체 100중량부에 대하여 0.5 내지 20중량부 포함되는 것이 바람직하다. 상기 수지 입자가 상기의 기준으로 0.5중량부 미만인 경우 방현성이 떨어지며, 20중량부를 초과할 경우 방현층의 백화가 심해진다. In addition, the resin particles are preferably contained 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare coating composition. When the said resin particle is less than 0.5 weight part on the said reference | standard, anti-glare property falls and when it exceeds 20 weight part, whitening of an anti-glare layer becomes severe.
상기 경화성 수지는 투광성 수지와 광개시제 및 용제를 포함한다. The curable resin includes a light transmitting resin, a photoinitiator and a solvent.
상기 투광성 수지는 다관능(메타)아크릴레이트를 포함한다. 상기 다관능 (메타)아크릴레이트의 구체적인 예로는 디펜타에리스리톨헥사(메타)아크릴레이트, 디펜타에리스리톨펜타(메타)아크릴레이트, 펜타에리스리톨테트라(메타)아크릴레이트, 디트리메틸올프로판테트라(메타)아크릴레이트, (메타)아크릴릭에스테르, 트리메틸올프로판트리(메타)아크릴레이트, 글리세롤트리(메타)아크릴레이트, 트리스(2-히드록시에틸)이소시아누레이트트리(메타)아크릴레이트, 에틸렌글리콜디(메타)아크릴레이트, 프로필렌글리콜(메타)아크릴레이트, 1,3-부탄디올디(메타)아크릴레이트, 1,4-부탄디올디(메타)아크릴레이트, 1,6-헥산디올디(메타)아크릴레이트, 네오펜틸글리콜디(메타)아크릴레이트, 디에틸렌글리콜디(메타)아크릴레이트, 트리에틸렌글리콜디(메타)아크릴레이트, 디프로필렌글리콜디(메타)아크릴레이트, 비스(2-히드록시에틸)이소시아누레이트디(메타)아크릴레이트, 히드록시에틸(메타)아크릴레이트, 히드록시프로필(메타)아크릴레이트, 히드록시부틸(메타)아크릴레이트, 이소옥틸(메타)아크릴레이트, 이소-덱실(메타)아크릴레이트, 스테아릴(메타)아크릴레이트, 테트라히드로퍼푸릴(메타)아크릴레이트, 페녹시에틸(메타)아크릴레이트 등을 들 수 있다. The light transmissive resin contains a polyfunctional (meth) acrylate. Specific examples of the multifunctional (meth) acrylate include dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, pentaerythritol tetra (meth) acrylate, and ditrimethylolpropane tetra (meth) acrylic acid. Ethylene, (meth) acrylic ester, trimethylolpropane tri (meth) acrylate, glycerol tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, ethylene glycol di (meth ) Acrylate, propylene glycol (meth) acrylate, 1,3-butanedioldi (meth) acrylate, 1,4-butanedioldi (meth) acrylate, 1,6-hexanedioldi (meth) acrylate, neo Pentyl glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, bis (2-hi) Hydroxyethyl) isocyanurate di (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, isooctyl (meth) acrylate, Iso-decyl (meth) acrylate, stearyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, phenoxyethyl (meth) acrylate, and the like.
상기 투광성 수지는 상기에서 예시한 다관능(메타)아크릴레이트를 적어도 1종 이상 포함한다.The said translucent resin contains at least 1 sort (s) of the polyfunctional (meth) acrylate illustrated above.
상기 투광성 수지는 특별히 제한되지는 않으나 상기 방현성 코팅 조성물 전체 100중량부에 대하여 10~90중량부 함유되는 것이 바람직하다. 상기 투광성 수지의 함량이 상기 기준으로 10~90중량부 범위내에 포함될 경우 우수한 방현성을 나타내므로 바람직하다. The light-transmissive resin is not particularly limited, but is preferably contained 10 to 90 parts by weight based on 100 parts by weight of the total anti-glare coating composition. When the content of the light-transmitting resin is included in the range of 10 to 90 parts by weight based on the above standards it is preferable because it shows excellent anti-glare property.
상기 광개시제로는 본 기술분야에서 사용되는 것이라면 제한되지 않고 사용될 수 있다. 상기 광개시제로는 구체적으로 2-메틸-1-[4-(메틸티오)페닐]2-모폴린프로판온-1, 디페닐케톤벤질디메틸케탈, 2-히드록시-2-메틸-1-페닐-1-온, 4-히드록시시클로페닐케톤, 디메톡시-2-페닐아세토페논, 안트라퀴논, 플루오렌, 트리페닐아민, 카바졸, 3-메틸아세토페논, 4-클로로아세토페논, 4,4-디메톡시아세토페논, 4,4-디아미노벤조페논, 1-히드록시시클로헥실페닐케톤으로 이루어진 군으로부터 선택되는 적어도 1종을 사용할 수 있다. The photoinitiator may be used without limitation as long as it is used in the art. Specific examples of the photoinitiator include 2-methyl-1- [4- (methylthio) phenyl] 2-morpholinepropanone-1, diphenyl ketone benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenyl- 1-one, 4-hydroxycyclophenylketone, dimethoxy-2-phenylacetophenone, anthraquinone, fluorene, triphenylamine, carbazole, 3-methylacetophenone, 4-chloroacetophenone, 4,4- At least one selected from the group consisting of dimethoxyacetophenone, 4,4-diaminobenzophenone and 1-hydroxycyclohexylphenyl ketone can be used.
상기 광개시제는 본 발명의 방현성 코팅 조성물 전체 100중량부에 대하여 0.1 내지 10중량부 포함되는 것이 바람직하다. 상기 광개시제가 0.1중량부 보다 적게 포함되는 경우에는 경화 속도가 늦고, 10중량부 보다 많게 포함되는 경우에는 과경화로 고분자 체인이 짧아져 방현층에 크랙이 발생할 수 있다The photoinitiator is preferably included 0.1 to 10 parts by weight based on 100 parts by weight of the total anti-glare coating composition of the present invention. When the photoinitiator is contained less than 0.1 parts by weight, the curing rate is slow, and when it is included more than 10 parts by weight, the polymer chain may be shortened due to overcuring and cracks may occur in the antiglare layer.
필요에 따라서는 상기 광개시제와 함께 광자극제가 사용될 수 있다. 상기 광자극제로는, 예를 들면 트리에틸아민, 디에틸아민, 메틸디에탄올아민, 에탄올아민, 4-디메틸아미노-벤조인산, 이소아밀-4-디메틸아미노벤조에이트 등이 사용될 수 있다. 상기 광자극제의 사용량은 반드시 제한되지는 않지만 상기 광개시제 전체 사용량 100중량부에 대하여 0.5 내지 50중량부 첨가할 수 있다. If necessary, a photostimulant may be used together with the photoinitiator. As the photo-stimulating agent, for example, triethylamine, diethylamine, methyl diethanolamine, ethanolamine, 4-dimethylamino-benzoic acid, isoamyl-4-dimethylaminobenzoate and the like can be used. Although the amount of the photostimulant is not necessarily limited, 0.5 to 50 parts by weight may be added based on 100 parts by weight of the total amount of the photoinitiator.
상기 용제는 본 기술분야에서 알려진 것은 제한되지 않고 사용될 수 있다. 상기 용제로는 구체적으로 알코올계(메탄올, 에탄올, 이소프로판올, 부탄올, 메톡시프로판올 등) 또는 케톤계(메틸에틸케톤, 메틸부틸케톤, 메틸이소부틸케톤, 디에틸케톤, 디프로필케톤 등) 등이 바람직하게 사용될 수 있다. The solvent can be used without limitation to those known in the art. Specific examples of the solvent include alcohols (methanol, ethanol, isopropanol, butanol, methoxypropanol, etc.) or ketones (methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, dipropyl ketone, etc.). It can be used preferably.
상기 용제는 방현성 코팅 조성물 100중량부에 대하여 0.1 내지 80중량부 포함되는 것이 좋다. 상기 용제의 함량이 0.1중량부 미만이면 점도가 높아 작업성이 떨어지고, 80중량부를 초과할 경우에는 건조 및 경화 과정에서 많은 시간이 많이 소요되고 경제성이 떨어지는 단점이 있다.The solvent is preferably included 0.1 to 80 parts by weight based on 100 parts by weight of the antiglare coating composition. When the content of the solvent is less than 0.1 parts by weight, the workability is high due to the high viscosity, and when it exceeds 80 parts by weight, it takes a lot of time in the drying and curing process, and there is a disadvantage in economy.
상기 경화성 수지는 시판되는 것을 사용할 수 있다. 또한 상기 경화성 수지에는 당해 분야에서 일반적으로 사용되는 유-무기 하이브리드 실리카가 추가로 사용될 수 있다. 상기 유-무기 하이브리드 실리카로는 실리카 표면의 히드록시기에 다관능 (메타)아크릴레이트를 포함하는 다관능 실란 화합물을 화학적으로 결합시켜 제조된 것을 들 수 있다. A commercially available thing can be used for the said curable resin. In addition, the curable resin may further be used an organic-inorganic hybrid silica commonly used in the art. Examples of the organic-inorganic hybrid silica include those produced by chemically bonding a polyfunctional silane compound containing a polyfunctional (meth) acrylate to a hydroxy group on a silica surface.
상기 유-무기 하이브리드 실리카는 제한되지 않으나 방현 코팅 조성물 100중량부에 대하여 5 내지 50중량부 사용하는 것이 바람직하다. 상기 범위 내에서 유-무기 하이브리드 실리카를 첨가할 경우 경화에 의한 수축을 저감시켜 코팅 필름의 컬링을 저감할 수 있는 장점이 있다.The organic-inorganic hybrid silica is not limited, but it is preferable to use 5 to 50 parts by weight based on 100 parts by weight of the antiglare coating composition. When the organic-inorganic hybrid silica is added within the above range, there is an advantage of reducing curling of the coating film by reducing shrinkage due to curing.
또한, 상기 경화성 수지는 방현성 코팅 조성물에 대전 방지 기능을 부여하기 위하여 전도성 미립자를 더 포함할 수 있다. 상기 전도성 미립자는 ATO, ITO, SnO2, Sb2O5, I2O3, Au, In2O3와 같은 전도성 금속 미립자 또는 폴리티오펜계, 폴리아세틸렌계, 폴리아닐린계, 폴리피롤계와 같은 전도성 고분자를 추가로 사용할 수 있다. In addition, the curable resin may further include conductive fine particles to impart an antistatic function to the antiglare coating composition. The conductive fine particles are conductive metal fine particles such as ATO, ITO, SnO 2 , Sb 2 O 5 , I 2 O 3 , Au, In 2 O 3 or conductive such as polythiophene, polyacetylene, polyaniline, polypyrrole Polymers may additionally be used.
또한 상기 전도성 미립자는 표면에 다관능(메타)아크릴레이트를 포함하는 다관능 실란 화합물을 화학적으로 결합시켜 제조된 것일 수도 있다.In addition, the conductive fine particles may be prepared by chemically bonding a multifunctional silane compound containing a polyfunctional (meth) acrylate on the surface.
상기 전도성 미립자는 특별히 제한되지는 않지만 상기 방현성 코팅 조성물 전체 100중량부에 대하여 0.5 내지 10중량부 포함되는 것이 바람직하다. 상기 전도성 미립자의 함량이 상기의 기준으로 0.5중량부 미만일 경우 대전방지 기능이 발휘되지 않으며, 그 함량이 10중량부를 초과할 경우 투과율이 저하되는 단점이 있다.The conductive fine particles are not particularly limited but are preferably included in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the total anti-glare coating composition. When the content of the conductive fine particles is less than 0.5 parts by weight based on the above standard, the antistatic function is not exerted, and when the content exceeds 10 parts by weight, the transmittance is lowered.
이외에도, 본 발명에 따른 경화성 수지에는 방현성 코팅 조성물에서 일반적으로 사용되는 항산화제, UV 흡수제, 광안정제, 열적고분자화 금지제, 레블링제, 계면활성제, 윤활제, 방오제 등이 추가적으로 포함될 수 있다.In addition, the curable resin according to the present invention may additionally include antioxidants, UV absorbers, light stabilizers, thermal polymerization inhibitors, labelling agents, surfactants, lubricants, antifouling agents and the like commonly used in anti-glare coating composition.
다음으로 투명 기재에 대하여 상세하게 설명하면 다음과 같다. 상기 투명 기재는 투명성이 있는 플라스틱 필름이면 어떠한 것이라도 사용 가능하다. 상기 투명 기재로는 구체적으로 노르보르넨 또는 다환 노르보르넨계 단량체와 같은 시클로올레핀을 포함하는 단량체의 단위를 갖는 시클로올레핀계 유도체, 셀룰로오스(디아세틸셀룰로오스, 트리아세틸셀룰로오스, 아세틸셀룰로오스부틸레이트, 이소부틸에스테르셀룰로오스, 프로피오닐셀룰로오스, 부티릴셀룰로오스, 아세틸프로피오닐셀룰로오스) 에틸렌-아세트산비닐공중합체, 폴리시클로올레핀, 폴리에스테르, 폴리스티렌, 폴리아미드, 폴리에테르이미드, 폴리아크릴, 폴리이미드, 폴리에테르술폰, 폴리술폰, 폴리에틸렌, 폴리프로필렌, 폴리메틸펜텐, 폴리염화비닐, 폴리염화비닐리덴, 폴리비닐알콜, 폴리비닐아세탈, 폴리에테르케톤, 폴리에테르에테르케톤, 폴리에테르술폰, 폴리메틸메타아크릴레이트, 폴리에틸렌테레프탈레이트, 폴리부틸렌테레프탈레이트, 폴리에틸렌나프탈레이트, 폴리카보네이트, 폴리우레탄, 에폭시 중에서 선택된 것을 사용할 수 있으며, 미연신 1축 또는 2축 연신 필름이 사용될 수 있다. 바람직하게 상기 예시한 투명 기재 중에서도 투명성 및 내열성이 우수한 1축 또는 2축 연신 폴리에스테르 필름, 투명성 및 내열성이 우수하면서 필름의 대형화에 대응할 수 있는 시클로올레핀계 유도체 필름, 폴리메틸메타크릴레이트 필름 및 투명성과 광학적으로 이방성이 없다는 점에서 트리아세틸셀룰로오스 및 이소부틸에스테르셀룰로오스 필름이 보다 바람직하다. Next, the transparent substrate will be described in detail as follows. As long as the said transparent base material is a plastic film with transparency, any thing can be used. Specific examples of the transparent base material include cycloolefin derivatives and cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate and isobutyl having units of monomers including cycloolefin such as norbornene or polycyclic norbornene monomer). Ester cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose) ethylene-vinyl acetate copolymer, polycycloolefin, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, poly Sulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate , Polybutyl Terephthalate, may be used polyethylene naphthalate, polycarbonate, selected from polyurethane, epoxy, may be used non-stretched uniaxially or biaxially stretched film. Preferably, a uniaxial or biaxially stretched polyester film having excellent transparency and heat resistance, a cycloolefin-based derivative film, polymethyl methacrylate film, and transparency capable of coping with the enlargement of the film, having excellent transparency and heat resistance, among the transparent substrates exemplified above. The triacetyl cellulose and the isobutyl ester cellulose films are more preferable in that they are not optically anisotropic.
상기 투명 기재의 두께는 특별히 제한되지는 않으나 8 내지 1000㎛인 것이 바람직하고, 40 내지 100㎛인 것이 보다 바람직하다. 상기 투명 기재 필름의 두께가 8㎛ 이하이면 필름의 강도가 저하되어 가공성이 떨어지게 되고, 1000㎛ 이상이면 투명성이 저하되거나 편광판의 중량이 커지는 문제가 발생한다. Although the thickness of the said transparent base material is not specifically limited, It is preferable that it is 8-1000 micrometers, and it is more preferable that it is 40-100 micrometers. If the thickness of the transparent base film is 8 μm or less, the film strength is lowered, resulting in poor workability. If the thickness is 1000 μm or more, transparency may be reduced or the weight of the polarizing plate may increase.
본 발명에 따른 방현 필름은 상기한 투명 기재에 전술한 방현성 코팅 조성물을 코팅하여 형성된 방현층을 포함한다. The anti-glare film according to the present invention includes an anti-glare layer formed by coating the anti-glare coating composition described above on the transparent substrate.
상기 방현성 코팅 조성물의 코팅은 다이코터, 에어 나이프, 리버스 롤, 스프레이, 블레이드, 캐스팅, 그라비아, 마이크로 그라비아 또는 스핀코팅 등의 적당한 방식으로 도공(Coating Process)이 가능하다. The coating of the anti-glare coating composition may be coated by a suitable method such as die coater, air knife, reverse roll, spray, blade, casting, gravure, micro gravure or spin coating.
이때, 본 발명에 따르면 상기 방현성 코팅 조성물은 경화 후의 표면 거칠기 Ra가 0.05um~0.2um가 되도록 코팅하는 것이 중요하다. 상기 표면 거칠기가 0.2um보다 큰 경우는 표면 요철에 의해 방현성은 우수하나 투과 선명도가 저하되는 단점이 있으며, 표면 거칠기가 0.05미만인 경우 반사 선명도가 상승하여 방현성이 저하되는 단점이 있다. At this time, it is important to coat the anti-glare coating composition such that the surface roughness Ra after curing is 0.05 um to 0.2 um. If the surface roughness is greater than 0.2 μm, the anti-glare property is excellent due to the surface irregularities, but there is a disadvantage in that the transmission sharpness is lowered. In the case where the surface roughness is less than 0.05, the reflection sharpness is increased to reduce the anti-glare property.
상기 방현성 코팅 조성물의 도포 두께는 반드시 제한되는 것은 아니나 보통 3~50㎛이며, 바람직하게는 5~40㎛이고, 보다 바람직하게는 5~35㎛이다. 상기 투명 기재에 도포된 방현성 코팅 조성물은 30 내지 150℃의 온도에서 10초 내지 2시간 동안, 보다 바람직하게는 30초 내지 1시간 동안 휘발물을 증발시켜 건조시킨다. 이후 UV광을 조사하여 경화시킨다. 상기 UV광의 조사량은 약 0.01 내지 10J/㎠인 것이 바람직하고, 0.1 내지 2J/㎠인 것이 보다 바람직하다. Although the coating thickness of the said anti-glare coating composition is not necessarily limited, it is usually 3-50 micrometers, Preferably it is 5-40 micrometers, More preferably, it is 5-35 micrometers. The anti-glare coating composition applied to the transparent substrate is dried by evaporating the volatiles for 10 seconds to 2 hours, more preferably 30 seconds to 1 hour at a temperature of 30 to 150 ℃. After curing by irradiation with UV light. It is preferable that it is about 0.01-10J / cm <2>, and, as for the irradiation amount of the said UV light, it is more preferable that it is 0.1-2J / cm <2>.
이때, 상기 방현 필름은 내부 헤이즈가 적어도 2%이고, 반사 선명도가 150 이하이며, 투과 선명도는 200이상으로서, 우수한 방현성과 우수한 반사 선명도 및 투과 선명도를 얻을 수 있다. In this case, the anti-glare film has an internal haze of at least 2%, a reflection clarity of 150 or less, and a transmission clarity of 200 or more, so that excellent anti-glare property and excellent reflection clarity and transmission clarity can be obtained.
본 발명에 따르면 상기 방현 필름은 일면에 저굴절층을 더 포함할 수 있다. 상기 저굴절층은 당해 분야에서 일반적으로 사용되는 것을 적용하여 형성할 수 있으며, 바람직하게 상기 저굴절층은 불소계, 실리카계, 혹은 다공질로 이루어진 것일 수 있다. 이때, 상기 저굴절층은 굴절률 1.25 내지 1.45 범위를 갖는 것이 바람직하다. 상기 저굴절층의 굴절률이 1.25 보다 낮은 경우에는 코팅시의 강도가 약한 단점이 있고, 굴절률이 1.45 보다 높은 경우에는 방현 코팅층과의 굴절률 차가 크지 않아 반사방지 효과가 충분히 발휘되지 못한다.According to the present invention, the anti-glare film may further include a low refractive layer on one surface. The low refractive index layer may be formed by applying generally used in the art, preferably, the low refractive layer may be made of fluorine, silica, or porous. At this time, the low refractive index layer preferably has a refractive index range of 1.25 to 1.45. When the refractive index of the low refractive index layer is lower than 1.25, the strength at the time of coating is weak, and when the refractive index is higher than 1.45, the difference in refractive index with the antiglare coating layer is not large and the antireflection effect is not sufficiently exhibited.
본 발명은 상기 방현 필름이 구비된 편광판을 제공한다. 일예로 상기 편광판은 적어도 한면에 본 발명에 따른 방현필름을 적층하여 형성될 수 있다. The present invention provides a polarizing plate provided with the antiglare film. For example, the polarizing plate may be formed by stacking an antiglare film according to the present invention on at least one surface.
상기 편광판은 특별히 제한되지 않으며, 다양한 종류가 사용될 수 있다. 상기 편광판으로는 예를 들면, 편광 기능을 부여하는 폴리비닐 알코올계(PVA) 필름 또는 에틸렌-비닐 아세테이트(EVA) 공중합체계 부분 비누화 필름 등의 친수성 고분자 필름에 요오드 또는 2색성 염료 등의 2색성 물질을 흡착시켜 1축 연신한 필름, 폴리비닐 알코올(PVA)의 탈수처리물이나 폴리염화비닐의 탈염산처리물 등의 폴리엔계 배향 필름 등을 들 수 있다. 이들 중에서도 폴리비닐 알코올계 필름 및 요오드 등의 2색성 물질로 이루어지는 편광판이 바람직하다.The polarizing plate is not particularly limited, and various kinds may be used. Examples of the polarizing plate include dichroic substances such as iodine or dichroic dye in hydrophilic polymer films such as a polyvinyl alcohol-based (PVA) film or an ethylene-vinyl acetate (EVA) copolymerized partially saponified film providing a polarizing function. The polyene type orientation film, such as the film which adsorb | sucked and uniaxially stretched, the dehydration process of polyvinyl alcohol (PVA), and the dehydrochlorination process of polyvinyl chloride, etc. are mentioned. Among these, the polarizing plate which consists of dichroic substances, such as a polyvinyl alcohol-type film and iodine, is preferable.
본 발명은 또한, 상기 방현 필름이 구비된 표시 장치를 제공한다. The present invention also provides a display device provided with the antiglare film.
일례로, 본 발명의 방현 필름이 구비된 편광판을 표시 장치에 내장시킴으로써 가시성이 우수한 표시 장치를 제조할 수 있다. 또한, 본 발명의 방현 필름을 표시 장치의 윈도우에 부착시킬 수도 있다. 본 발명의 방현 필름은 반사형, 투과형, 반투과형 LCD 또는 TN(Twisted Nematic)형, STN(Super Twisted Nematic)형, OCB(Optical Compensation Bend)형, HAN형, VA(Vertical Alignment)형, IPS(In Plain Switching)형 등의 각종 구동 방식의 LCD에 바람직하게 이용될 수 있다. 또한, 본 발명의 방현 필름은 플라즈마 디스플레이, 필드 에미션 디스플레이, 유기 EL 디스플레이, 무기 EL 디스플레이, 전자 페이퍼 등의 각종 표시 장치에도 바람직하게 이용될 수 있다. As an example, the display device excellent in visibility can be manufactured by embedding the polarizing plate with an anti-glare film of this invention in a display device. Moreover, the anti-glare film of this invention can also be made to adhere to the window of a display apparatus. Anti-glare film of the present invention is reflective, transmissive, semi-transmissive LCD or TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, OCB (Optical Compensation Bend) type, HAN type, VA (Vertical Alignment) type, IPS ( It can be preferably used for LCDs of various driving methods such as In Plain Switching). In addition, the anti-glare film of the present invention can be preferably used for various display devices such as a plasma display, a field emission display, an organic EL display, an inorganic EL display, and an electronic paper.
이하와 같이, 본 발명을 실시예에 기초하여 더욱 상세하게 설명하지만, 하기에 개시되는 본 발명의 실시 형태는 어디까지 예시로써, 본 발명의 범위는 이것들의 실시 형태에 한정되지 않는다. 본 발명의 범위는 특허청구범위에 표시되었고, 더욱이 특허청구범위의 기록과 균등한 의미 및 범위 내에서의 모든 변경을 함유하고 있다.As follows, the present invention will be described in more detail based on examples, but the embodiments of the present invention disclosed below are exemplified to the last, and the scope of the present invention is not limited to these embodiments. The scope of the invention is indicated in the appended claims, and moreover, contains all changes within the meaning and range equivalent to those of the claims.
<실시예 1><Example 1>
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 2.25중량부를 메틸에틸케톤 8.25중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 유-무기 하이브리드 실리카를 포함하는 경화성 수지(DN-0081, JSR사 제조) 89.5중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.13um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.2.25 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having a refractive index of 1.43 parts were dispersed in 8.25 parts by weight of methyl ethyl ketone, and then containing a translucent resin, a solvent, an initiator, and an organic-inorganic hybrid silica. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.13 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<실시예 2><Example 2>
굴절률이 1.43인 평균 입경 4.5um인 실리콘 수지 미립자(Tospearl145, 도시바실리콘사 제조) 2.25중량부를 메틸에틸케톤 8.25중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 유-무기 하이브리드 실리카를 포함하는 경화성 수지(DN-0081, JSR사 제조) 89.5중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.11um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.2.25 parts by weight of silicone resin fine particles (Tospearl145, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 4.5 um with a refractive index of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, followed by dispersion. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR), and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.11 μm, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<실시예 3><Example 3>
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.15um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<실시예 4><Example 4>
굴절률이 1.43인 평균 입경 4.5um인 실리콘 수지 미립자(Tospearl145, 도시바실리콘사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.12um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of silicone resin fine particles (Tospearl145, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 4.5 um with a refractive index of 1.43 were added to 6.40 parts by weight of methyl ethyl ketone, and dispersed therein. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having a (meth) acrylate and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.12 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 1>Comparative Example 1
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 2.25중량부를 메틸에틸케톤 8.25중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 유-무기 하이브리드 실리카를 포함하는 경화성 수지(DN-0081, JSR사 제조) 89.5중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.25um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.2.25 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having an index of refraction of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, and then dispersed. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated to have a surface roughness Ra of 0.25 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 2>Comparative Example 2
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 2.25중량부를 메틸에틸케톤 8.25중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 유-무기 하이브리드 실리카를 포함하는 경화성 수지(DN-0081, JSR사 제조) 89.5중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.04um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.2.25 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 having an index of refraction of 1.43 were added to 8.25 parts by weight of methyl ethyl ketone, and then dispersed. It was mixed with 89.5 parts by weight of curable resin (DN-0081, manufactured by JSR) and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent base film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.04 μm, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 3>Comparative Example 3
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.28um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.28 μm, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 4><Comparative Example 4>
굴절률이 1.43인 평균 입경 6um인 실리콘 수지 미립자(Tospearl2000B, 도시바실리콘사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.03um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of silicone resin fine particles (Tospearl2000B, manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 1.43 with a refractive index of 1.43 parts were dispersed in 6.40 parts by weight of methyl ethyl ketone, and then dispersed on a surface as a light transmitting resin, a solvent, an initiator, and conductive particles. It was mixed with 92.17 parts by weight of curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having meth) acrylate and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and then coated with a surface roughness Ra of 0.03 μm, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 5>Comparative Example 5
굴절률이 1.49인 평균 입경 4.5um인 고분자 수지 미립자(SSX-104, 세끼스이 플라스틱사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.15um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of polymer resin fine particles (SSX-104, manufactured by Sekisui Plastic Co., Ltd.) having an average particle diameter of 4.5 μm having a refractive index of 1.49 were added to 6.40 parts by weight of methyl ethyl ketone, and dispersed therein, and then surfaced as a translucent resin, a solvent, an initiator, and conductive particles It was mixed with 92.17 parts by weight of the curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having a polyfunctional (meth) acrylate in the mixture, and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<비교예 6>Comparative Example 6
굴절률이 1.51인 평균 입경 4.5um인 고분자 수지 미립자(XX-1734Z, 세끼스이 플라스틱사 제조) 1.43중량부를 메틸에틸케톤 6.40중량부에 투입하여 분산시킨 후, 투광성 수지와 용제, 개시제 및 전도성 미립자로서 표면에 다관능 (메타)아크릴레이트를 가지는 ATO 미립자를 포함하는 경화성 수지(EC190-03, Kriya사 제조) 92.17중량부와 혼합하여 1시간 동안 교반하였다. 상기 교반하여 얻어진 방현성 코팅 조성물을 투명 기재필름(80㎛, TAC;Triacetate Cellulose) 위에 마이어바로 건조 후 표면 거칠기 Ra가 0.15um되도록 도포하고, 70℃에서 1분간 건조한 후, 700mJ/㎠으로 경화시킴으로써 방현 필름을 제조하였다.1.43 parts by weight of polymer resin fine particles (XX-1734Z, manufactured by Sekisui Plastics Co., Ltd.) having an average particle diameter of 4.5 um with a refractive index of 1.51 were added to 6.40 parts by weight of methyl ethyl ketone, and dispersed therein. It was mixed with 92.17 parts by weight of the curable resin (EC190-03, manufactured by Kriya) containing ATO fine particles having a polyfunctional (meth) acrylate in the mixture, and stirred for 1 hour. The anti-glare coating composition obtained by stirring was dried on a transparent substrate film (80 μm, TAC; Triacetate Cellulose) with a meyer bar, and coated with a surface roughness Ra of 0.15 um, dried at 70 ° C. for 1 minute, and then cured at 700 mJ / cm 2. An antiglare film was prepared.
<실험예 1>Experimental Example 1
- 굴절률 차이Refractive index difference
상기 실시예 1 내지 4 및 비교예 1 내지 6에서 사용된 경화성 수지를 실리콘 웨이퍼에 스핀 코팅 후 70℃에서 1분간 건조한 후, 700mJ/㎠으로 UV경화시켜 박막을 얻고, 상기 박막의 굴절률을 엘립소미터를 통해 측정하였으며, 측정된 굴절률 값과 수지 입자의 굴절률의 차이 값을 산출하고 그 결과를 하기 표 1에 나타내었다. After spin coating the curable resin used in Examples 1 to 4 and Comparative Examples 1 to 6 on a silicon wafer and drying at 70 ° C. for 1 minute, UV curing was performed at 700 mJ / cm 2 to obtain a thin film, and the refractive index of the thin film was ellipso. Measured through a meter, the difference between the measured refractive index value and the refractive index of the resin particles is calculated and the results are shown in Table 1 below.
<실험예 2>Experimental Example 2
상기 실시예 1 내지 4 및 비교예 1 내지 6에서 제조한 방현 필름을 하기와 같은 방법으로 물성 측정 및 평가하였으며, 그 결과를 다음 표 1에 나타내었다. Physical properties of the antiglare films prepared in Examples 1 to 4 and Comparative Examples 1 to 6 were measured and evaluated in the following manner, and the results are shown in Table 1 below.
- 전광선 투과율 및 헤이즈Total light transmittance and haze
분광광도계(HZ-1, 일본 스가사 제조)를 이용하여 전광선 투과율(Total Transmittance)과 헤이즈를 측정하였다. Total light transmittance and total haze were measured using a spectrophotometer (HZ-1, manufactured by Suga Corporation, Japan).
- 투과 선명도 및 반사 선명도-Transmission clarity and reflection clarity
선명도 측정기(ICM-1T, 일본 스가사 제조)를 이용하여 투과 선명도 및 반사 선명도를 측정하였다.Transmission clarity and reflection clarity were measured using the sharpness measuring instrument (ICM-1T, Japan Corporation make).
투과 선명도: 0.125, 0.50, 1.0, 2.0 슬릿값의 합Transmission Clarity: Sum of 0.125, 0.50, 1.0, 2.0 slit values
반사 선명도: 0.5, 1.0, 2.0 슬릿값의 합Reflection Sharpness: Sum of 0.5, 1.0, and 2.0 slit values
표 1
실시예 1 실시예 2 실시예 3 실시예 4 비교예 1 비교예 2 비교예 3 비교예 4 비교예 5 비교예 6
전광선 투과율(%) 92.5 91.7 91.8 91.6 91.3 93.0 89.3 92.5 88.9 90.5
내부 헤이즈(%) 8.5 9.8 7.2 10.1 5.3 13.1 6.4 14.3 1.8 0.9
투과 선명도 293.5 302.5 225.3 325.7 132.0 369.9 15.3 356.2 155.2 142.1
반사 선명도 80.5 101.3 37.1 110.7 20.6 260.5 25.5 245.7 85.2 71.6
굴절률 차이 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.02 0.00
표면거칠기 Ra(um) 0.13 0.11 0.15 0.12 0.25 0.04 0.28 0.03 0.15 0.15
Table 1
Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6
Total light transmittance (%) 92.5 91.7 91.8 91.6 91.3 93.0 89.3 92.5 88.9 90.5
Internal haze (%) 8.5 9.8 7.2 10.1 5.3 13.1 6.4 14.3 1.8 0.9
Transmission clarity 293.5 302.5 225.3 325.7 132.0 369.9 15.3 356.2 155.2 142.1
Reflection sharpness 80.5 101.3 37.1 110.7 20.6 260.5 25.5 245.7 85.2 71.6
Refractive index difference 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.02 0.00
Surface Roughness Ra (um) 0.13 0.11 0.15 0.12 0.25 0.04 0.28 0.03 0.15 0.15
상기 표 1에 나타낸 바와 같이 수지 입자와 경화성 수지의 경화후의 굴절률 차이 및 표면 거칠기 Ra가 본 발명의 범위 내에 포함된 실시예 1 내지 4의 방현 필름은 비교예의 방현 필름에 비하여 모두 낮은 반사 선명도을 나타내어 우수한 방현성을 나타내면서도, 동시에 높은 투과 선명도를 나타냄을 확인할 수 있다.As shown in Table 1, the anti-glare films of Examples 1 to 4, in which the refractive index difference and the surface roughness Ra of the resin particles and the curable resin after curing were included in the scope of the present invention, all exhibited low reflection sharpness as compared to the anti-glare film of the comparative example. It can be seen that while exhibiting anti-glare property, it also exhibits high transmission clarity.

Claims (8)

  1. 투명 기재와, 상기 투명 기재의 일면 또는 양면에 방현성 코팅 조성물을 코팅하여 형성한 방현층을 포함하여 이루어지는 방현 필름에 있어서, In the anti-glare film comprising a transparent substrate and an anti-glare layer formed by coating the anti-glare coating composition on one side or both sides of the transparent substrate,
    상기 방현성 코팅 조성물은 다관능(메타)아크릴레이트를 포함하는 투광성 수지와 광개시제 및 용제를 포함하는 경화성 수지와 수지 입자로 이루어지며, The anti-glare coating composition is made of a light-transmissive resin containing a polyfunctional (meth) acrylate and a curable resin and a resin particle containing a photoinitiator and a solvent,
    상기 수지 입자는 상기 경화성 수지의 경화후와의 굴절률 차이가 0.03 내지 0.20이며, The resin particles have a refractive index difference of 0.03 to 0.20 after curing of the curable resin,
    상기 방현층은 상기 방현성 코팅 조성물을 표면 거칠기 Ra 값이 0.05um~0.2um가 되도록 코팅하여 형성한 것을 특징으로 하는 방현 필름. The anti-glare layer is formed by coating the anti-glare coating composition so that the surface roughness Ra value is 0.05um ~ 0.2um.
    상기 방현층은 상기 방현성 코팅 조성물을 표면 거칠기 Ra 값이 0.05um~0.2um가 되도록 코팅하여 형성한 것을 특징으로 하는 방현 필름. The anti-glare layer is formed by coating the anti-glare coating composition so that the surface roughness Ra value is 0.05um ~ 0.2um.
  2. 청구항 1에 있어서, 상기 방현 필름은 내부 헤이즈가 적어도 2%이고, 반사 선명도가 150 이하이고, 투과 선명도는 200 이상인 것을 특징으로 하는 방현 필름. The antiglare film of claim 1, wherein the antiglare film has an internal haze of at least 2%, a reflection sharpness of 150 or less, and a transmission sharpness of 200 or more.
  3. 청구항 1에 있어서, 상기 수지 입자는 평균 입경이 1 내지 10㎛인 것을 특징으로 하는 방현 필름. The anti-glare film of claim 1, wherein the resin particles have an average particle diameter of 1 to 10 µm.
  4. 청구항 1에 있어서, 상기 수지 입자는 상기 방현성 코팅 조성물 전체 100중량부에 대하여 0.5 내지 20중량부 포함되는 것을 특징으로 하는 방현 필름. The anti-glare film of claim 1, wherein the resin particles are contained in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare coating composition.
  5. 청구항 1에 있어서, 상기 방현성 코팅 조성물이 전도성 미립자를 더 포함하는 것을 특징으로 하는 방현 필름.The anti-glare film of claim 1, wherein the anti-glare coating composition further comprises conductive fine particles.
  6. 청구항 1에 있어서, 상기 방현 필름이 1.25 내지 1.45의 굴절률을 갖는 저굴절층을 더 포함하는 것을 특징으로 하는 방현 필름.The anti-glare film of claim 1, wherein the anti-glare film further comprises a low refractive index layer having a refractive index of 1.25 to 1.45.
  7. 청구항 1 내지 청구항 6 중 어느 한 항의 방현 필름을 구비한 것을 특징으로 하는 편광판.The anti-glare film of any one of Claims 1-6 was provided. The polarizing plate characterized by the above-mentioned.
  8. 청구항 1 내지 청구항 6 중 어느 한 항의 방현 필름을 구비한 것을 특징으로 하는 표시 장치.The anti-glare film of any one of Claims 1-6 was provided. The display apparatus characterized by the above-mentioned.
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KR20010049433A (en) * 1999-05-28 2001-06-15 기타지마 요시토시 Glare reducing film and method of manufacturing thereof
JP2002254573A (en) * 2001-03-05 2002-09-11 Dainippon Printing Co Ltd Antistatic glare-proof film
JP2005092197A (en) * 2003-08-13 2005-04-07 Sumitomo Chemical Co Ltd Antidazzle optical film

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Publication number Priority date Publication date Assignee Title
KR20010049433A (en) * 1999-05-28 2001-06-15 기타지마 요시토시 Glare reducing film and method of manufacturing thereof
JP2002254573A (en) * 2001-03-05 2002-09-11 Dainippon Printing Co Ltd Antistatic glare-proof film
JP2005092197A (en) * 2003-08-13 2005-04-07 Sumitomo Chemical Co Ltd Antidazzle optical film

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