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WO2016052883A1 - Plaque de polarisation et dispositif d'affichage d'images doté de celle-ci - Google Patents

Plaque de polarisation et dispositif d'affichage d'images doté de celle-ci Download PDF

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Publication number
WO2016052883A1
WO2016052883A1 PCT/KR2015/009571 KR2015009571W WO2016052883A1 WO 2016052883 A1 WO2016052883 A1 WO 2016052883A1 KR 2015009571 W KR2015009571 W KR 2015009571W WO 2016052883 A1 WO2016052883 A1 WO 2016052883A1
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WO
WIPO (PCT)
Prior art keywords
polarizing plate
hard coating
film
meth
acrylate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2015/009571
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English (en)
Korean (ko)
Inventor
임거산
박송희
이정은
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongwoo Fine Chem Co Ltd
Original Assignee
Dongwoo Fine Chem Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongwoo Fine Chem Co Ltd filed Critical Dongwoo Fine Chem Co Ltd
Publication of WO2016052883A1 publication Critical patent/WO2016052883A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a polarizing plate and an image display device having the same.
  • a polarizing plate base films, such as cellulose resin, are bonded to both surfaces of the polarizer on the film which consists of polyvinyl alcohol (PVA) etc. generally.
  • PVA polyvinyl alcohol
  • Such a polarizing plate is used as a main component of various display panels, such as a liquid crystal display (LCD), a cathode ray tube (CRT), and an electroluminescent display (EL).
  • LCD liquid crystal display
  • CRT cathode ray tube
  • EL electroluminescent display
  • the tempered glass may be replaced. In this case, it can be applied to various touch screen devices including a smart phone.
  • the thickness of the hard coating film may be formed thick, but in this case, the hardness of the obtained hard coating film may be improved, but the peeling of the hard coating layer may occur, and the end of the hard coating film may be rolled out by curing shrinkage or hot / humid shrinkage. The rising curl becomes large and there exists a problem of handleability falling.
  • the conventional hard coating composition has been used a polymer as a photocurable compound, there is a problem that the compatibility or poor optical properties may be lowered depending on the molecular weight of the polymer.
  • Korean Patent Publication No. 2013-0051824 discloses a hard coating film comprising a polyester polyol-modified hyperbranched (meth) acrylate and having a curl of more than 0 and 20 mm or less when laminated on a base film having a specific thickness. It did not provide an alternative to the problem.
  • An object of this invention is to provide the high hardness polarizing plate with high hardness.
  • an object of this invention is to provide the polarizing plate which can maintain the outstanding hardness, without reducing the hardness by an adhesion layer.
  • An object of the present invention is to provide an image display device having the polarizing plate.
  • a polarizing plate comprising a polarizer having a hard coating film on both sides, wherein any one of the hard coating films is provided with an adhesive layer on the opposite side of the surface in contact with the polarizer.
  • the hard coating film is made of a composition for forming a hard coating comprising a non-polymeric photocurable compound, a photoinitiator and a solvent.
  • non-polymeric photocurable compound is (meth) acrylate oligomer; And a monomer including at least one functional group selected from the group consisting of a (meth) acrylate group, a vinyl group, a styryl group, and an allyl group; At least one of, a polarizing plate.
  • the monomer is a monomer containing a (meth) acrylate group, the polarizing plate.
  • the polarizing plate In the above 1, wherein the non-polymeric photocurable compound is included in 1 to 80 parts by weight based on 100 parts by weight of the total composition for the hard coating layer, the polarizing plate.
  • the hard coating film is a polarizing plate comprising a transparent base film and a hard coating layer.
  • the hard coating film is a polarizing plate is disposed so that the transparent base film is in contact with the polarizer.
  • the other hard coating film is disposed so that the transparent base film is in contact with the polarizer.
  • the transparent base film is further provided with a second hard coating layer on the opposite side of the surface on which the hard coating layer is formed, the polarizing plate.
  • the transparent base film is an acrylic resin film, a polyester resin film, a cellulose resin film or a polyolefin resin film, polarizing plate.
  • the transparent base film is a triacetyl cellulose (TAC) film
  • TAC triacetyl cellulose
  • Image display device having a polarizing plate of any one of 1 to 13.
  • An object of this invention is to provide the high hardness polarizing plate with high hardness.
  • the present invention can maintain a good hardness without a decrease in hardness even if the adhesive layer by including a non-polymeric photo-curable compound.
  • the present invention minimizes the decrease in hardness due to the adhesive layer, and can maintain a high pencil hardness of the hard coat film even when the adhesive layer is included.
  • FIG. 1 is a view schematically showing an embodiment of a polarizing plate according to the present invention.
  • FIG. 2 is a view schematically showing another embodiment of a polarizing plate according to the present invention.
  • FIG. 3 is a view schematically showing another embodiment of a polarizing plate according to the present invention.
  • the present invention includes a polarizer having a hard coating film on both sides, and any one of the hard coating films is provided with an adhesive layer on the opposite side of the surface in contact with the polarizer, so that even if the adhesive layer includes a high pencil of the hard coating film
  • the polarizing plate which can maintain hardness, and the image display apparatus provided with the said polarizing plate.
  • FIG. 1 schematically shows an embodiment of a polarizing plate according to the present invention.
  • Polarizer according to the present invention has a structure having a hard coating film on both sides.
  • the polarizer according to the present invention may be a polarizer commonly used in the art prepared according to a process including the steps of swelling, dyeing, crosslinking, stretching, washing, drying, and the like for forming a polarizer film.
  • the polarizer-forming film is not particularly limited as long as it is a dichroic substance, that is, a film that can be dyed with iodine, and the like, for example, a polyvinyl alcohol film, a polyvinyl alcohol film dehydrated, a polyvinyl alcohol film treated with dehydrochloric acid, Polyethylene terephthalate films, ethylene-vinyl acetate copolymer films, ethylene-vinyl alcohol copolymer films, cellulose films, partially gumified films thereof, and 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 hard coat film according to the present invention may be prepared as a composition for forming a hard coat comprising a non-polymeric photocurable compound, a photoinitiator and a solvent.
  • the photocurable compound may include a monomer including at least one functional group selected from the group consisting of a (meth) acrylate oligomer or a (meth) acrylate group, a vinyl group, a styryl group, and an allyl group.
  • the polymer refers to a polymer having a weight average molecular weight of 10,000 or more.
  • (meth) acrylate means acrylate, methacrylate or both.
  • the present invention does not include a photocurable cross-linked polymer in the hard coating layer, it is possible to solve the problems caused by difficulty in precise control of the molecular weight of the polymer, such as haze (haze) caused by hardness decrease, molecular weight increase when using the polymer have.
  • haze haze
  • the hardness of the other surface in the case of a polarizing plate having an adhesive layer on one side is generally lower than before the adhesive layer is provided.
  • the decrease in hardness due to the adhesive layer is minimized.
  • the pencil hardness of the hard-coating film side surface may be 5H or more, and the upper limit of the hardness is not particularly limited and may be 9H, for example.
  • the pencil hardness difference between the hard coating film side surface pencil hardness of the polarizing plate of the present invention and the hard coating film may be 2H or less.
  • the (meth) acrylate oligomer may preferably be an epoxy (meth) acrylate oligomer or a urethane (meth) acrylate oligomer, and more preferably a urethane (meth) acrylate oligomer.
  • the urethane (meth) acrylate oligomer can be prepared by reacting a polyfunctional (meth) acrylate having a hydroxy group in a molecule with a compound having an isocyanate group in the presence of a catalyst.
  • the (meth) acrylate having a hydroxy group in the molecule examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxyisopropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and capro It may be a lactone ring-opening hydroxy acrylate, pentaerythritol tri / tetra (meth) acrylate mixture and dipentaerythritol penta / hexa (meth) acrylate mixture, these may be used alone or in combination of two or more.
  • the compound having an isocyanate group examples include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane, 1,8-diisocyanatooctane, 1,12-diisocyanatododecane, 1 , 5-diisocyanato-2-methylpentane, trimethyl-1,6-diisocyanatohexane, 1,3-bis (isocyanatomethyl) cyclohexane, trans-1,4-cyclohexene diisocyanate, 4, 4'-methylenebis (cyclohexyl isocyanate), isophorone diisocyanate, toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, xylene-1,4-diisocyanate, tetramethylxylene-1 , 3-diisocyanate, 1-chloromethyl-2,4-
  • the epoxy (meth) acrylate oligomers include bisphenol A epoxy acrylate, bisphenol A epoxy methacrylate, phenyl epoxy acrylate, aliphatic alkyl epoxy acrylate, soybean oil epoxy acrylate, acid pendant novolac epoxy acrylate, phenyl Novolak epoxy acrylate, cresol novolak epoxy acrylate, etc. are mentioned, These can be used individually or in mixture of 2 or more types, respectively.
  • the monomer containing at least one functional group selected from the group consisting of a (meth) acrylate group, a vinyl group, a styryl group, and an allyl group has an unsaturated group in the molecule, and particularly, a (meth) acrylate group is more preferable.
  • the monomer having a (meth) acrylate group include urethane acrylate, neopentyl glycol acrylate, 1,6-hexanediol (meth) acrylate, propylene glycol di (meth) acrylate, triethylene glycol di ( Meta) acrylate, dipropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane tree (meth) ) Acrylate, 1,2,4-cyclohexanetetra (meth) acrylate, pentaglycerol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tree To (meth) acrylate, dipentaeryth
  • the content of the photocurable compound is not particularly limited, but may preferably include 1 to 80 parts by weight based on 100 parts by weight of the total composition for forming the hard coating layer. Sufficient hardness can be improved in the said range, and the problem which curling becomes severe can be prevented.
  • the photoinitiator included in the composition for forming a hard coat according to the present invention may be used without particular limitation as long as it is used in the art.
  • the photoinitiator is 2-methyl-1- [4- (methylthio) phenyl] 2-morpholinepropanone-1, diphenylketone benzyldimethyl ketal, 2-hydroxy-2-methyl-1-phenyl-1 -One, 4-hydroxycyclophenylketone, dimethoxy-2-phenylatetophenone, anthraquinone, fluorene, triphenylamine, carbazole, 3-methylacetophenone, 4-knoloacetophenone, 4,4 -Dimethoxyacetophenone, 4,4-diaminobenzophenone, 1-hydroxycyclohexylphenylketone, and benzophenone, each of which may be used alone or in combination of two or more thereof.
  • the photoinitiator may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total composition for forming a hard coat layer.
  • the content of the photoinitiator is less than 0.1 parts by weight, the curing rate is slow, and when it exceeds 10 parts by weight, cracks may occur in the hard coat layer due to over curing.
  • the solvent included in the composition for forming a hard coat of the present invention may be used without particular limitation as long as it is known as a solvent of the composition for forming a hard coat in the art.
  • the solvent may be alcohols such as methanol, ethanol, isopropanol, butanol, methyl cellosolve, ethyl cellosolve, etc .; Ketones such as methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, dipropyl ketone and cyclohexanone; Hexanes such as hexane, heptane and octane; Ethers such as propylene glycol monomethyl ether; And benzenes such as benzene, toluene and xylene. These can be used individually or in mixture of 2 or more types, respectively.
  • alcohols such as methanol, ethanol, isopropanol, butanol, methyl cellosolve, ethyl cellosolve, etc .
  • Ketones such as methyl ethyl ketone, methyl but
  • the solvent may be included in an amount of 10 to 95 parts by weight based on 100 parts by weight of the total composition for forming a hard coat layer. If the solvent is less than 10 parts by weight on the basis of the high viscosity is low workability, when it exceeds 95 parts by weight it takes a long time in the curing process and there is a problem of low economic efficiency.
  • the composition for forming a hard coat according to the present invention may further include additives known in the art.
  • additives known in the art.
  • an inorganic filler the nano silica sol for further strengthening hardness is mentioned.
  • the hard coating film according to the present invention may be a single film or may have a laminated structure including a transparent base film and a hard coating layer.
  • between the polarizer and the adhesive layer may have a structure in which the hard coating layer is in contact with the polarizer, but the hard coating layer is preferably positioned at the outermost side to secure hardness.
  • 2 schematically illustrates an embodiment in which the hard coating film has a laminated structure including a transparent base film and a hard coating layer, respectively.
  • the transparent base film according to the present invention may further include a second hard coating layer on the opposite side of the surface on which the hard coating layer is formed.
  • 3 schematically illustrates an embodiment in which a hard coating film is formed in a structure in which a transparent base film is interposed between different hard coating layers.
  • the transparent substrate film may include an acrylic resin film, a polyester resin film, a cellulose resin film, a polyolefin resin film, and the like, preferably a triacetyl cellulose (TAC) film.
  • TAC triacetyl cellulose
  • the polarizer and the hard coat film, or the transparent base film may be bonded by lamination using an adhesive or the like.
  • the adhesive usable in the present invention is not particularly limited as long as it is known in the art.
  • PVA polyvinyl alcohol
  • SBR styrene butadiene rubber
  • hot melt adhesives It is not limited.
  • the adhesive layer according to the present invention is provided on the opposite side of the surface in contact with the polarizer in any one of the hard coating film in contact with the polarizer.
  • the adhesive layer is provided to attach the high hardness polarizing plate according to the present invention to another member such as a liquid crystal cell and another optical functional film.
  • the pressure-sensitive adhesive layer may be formed using a pressure-sensitive adhesive known in the art without particular limitation.
  • the present invention provides an image display device including the polarizing plate.
  • the polarizing plate according to the present invention can be applied to any conventional image display device.
  • a liquid crystal display device including a liquid crystal panel obtained by laminating a polarizing plate having an adhesive layer laminated on at least one side of a liquid crystal cell can be configured. .
  • the image display apparatus of the present invention may further include a configuration known in the art in addition to the polarizing plate.
  • urethane acrylate (10 functional, Miwon Corporation, SC2153), 10 parts by weight of pentaerythritol triacrylate (trifunctional, Miwon Corporation, M340), an organic acrylate and a nano silica sol (12 nm) having an average number of functional groups of 6.5 functional groups , 40% solids, catalyzed sand, V8802) 50 parts by weight, 20 parts by weight of methyl ethyl ketone (large gold), 7 parts by weight of propylene glycol monomethyl ether (large gold), photoinitiator (Shiba Corporation, I-184) 2.5 parts by weight of a leveling agent (BYK Chemisa, BYK3530) 0.5 parts by weight was blended using a stirrer and filtered using a filter made of polypropylene (PP) to prepare a hard coating composition of high hardness.
  • a leveling agent BYK Chemisa, BYK3530
  • a high hardness hard coat composition was prepared in the same manner as in Preparation Example 1, except that 20 parts by weight of polyester acrylate having a molecular weight of 100,000 was further included.
  • the coating thickness is 15 ⁇ m and cured to a polarizing plate as shown in Table 1 below Was prepared.
  • Pencil Hardness Tester pencil hardness tester, Seokbo Science
  • Comparative Example 3 of the polarizing plate including a hard coating film made of a polymer was confirmed that the number of scratches and haze is also high.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

La présente invention concerne une plaque de polarisation et un dispositif d'affichage d'images, et de manière plus spécifique, une plaque de polarisation et un dispositif d'affichage d'images doté de celle-ci, la plaque de polarisation comportant un polariseur ayant des films de revêtement dur sur les deux surfaces de celui-ci, l'un des films de revêtement dur ayant une couche adhésive sur la surface opposée à la surface en contact avec le polariseur de telle sorte que les films de revêtement dur peuvent maintenir une haute dureté au crayon, même avec la couche adhésive.
PCT/KR2015/009571 2014-10-02 2015-09-11 Plaque de polarisation et dispositif d'affichage d'images doté de celle-ci Ceased WO2016052883A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0133566 2014-10-02
KR1020140133566A KR20160040051A (ko) 2014-10-02 2014-10-02 편광판 및 이를 구비한 화상 표시 장치

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WO2016052883A1 true WO2016052883A1 (fr) 2016-04-07

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KR (1) KR20160040051A (fr)
TW (1) TW201613752A (fr)
WO (1) WO2016052883A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102082410B1 (ko) * 2016-07-22 2020-02-27 동우 화인켐 주식회사 하드코팅 필름 및 이를 구비한 터치센서를 포함하는 플렉서블 디스플레이 윈도우
JPWO2019216120A1 (ja) * 2018-05-09 2021-05-27 日本化薬株式会社 偏光板及びそれを用いた表示装置
KR102581428B1 (ko) * 2019-05-28 2023-09-21 주식회사 엘지화학 반사 방지 필름, 편광판 및 디스플레이 장치
US12158654B2 (en) 2020-10-16 2024-12-03 Lg Chem, Ltd. Polarizing plate for display device and display device comprising the same
KR102681560B1 (ko) * 2022-03-24 2024-07-04 동우 화인켐 주식회사 투과율 가변 광학 적층체 및 이의 제조방법과, 이를 포함하는 스마트 윈도우
KR102633703B1 (ko) * 2022-07-06 2024-02-06 동우 화인켐 주식회사 광학 적층체 및 이를 포함하는 스마트 윈도우

Citations (5)

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KR20100077798A (ko) * 2008-12-29 2010-07-08 제일모직주식회사 자외선 경화형 하드코팅용 조성물, 이를 이용한 내오염성이우수한 편광판 및 하드코팅층 형성 방법
KR20110109206A (ko) * 2010-03-30 2011-10-06 동우 화인켐 주식회사 편광판 및 이것이 구비된 액정표시장치
JP2012022189A (ja) * 2010-07-15 2012-02-02 Dainippon Printing Co Ltd 光学積層体、偏光板及び画像表示装置
JP2014035365A (ja) * 2012-08-07 2014-02-24 Toyobo Co Ltd 偏光子保護用ポリエステルフィルム
KR20140031103A (ko) * 2012-09-03 2014-03-12 주식회사 엘지화학 하드코팅 필름을 포함하는 편광판

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100077798A (ko) * 2008-12-29 2010-07-08 제일모직주식회사 자외선 경화형 하드코팅용 조성물, 이를 이용한 내오염성이우수한 편광판 및 하드코팅층 형성 방법
KR20110109206A (ko) * 2010-03-30 2011-10-06 동우 화인켐 주식회사 편광판 및 이것이 구비된 액정표시장치
JP2012022189A (ja) * 2010-07-15 2012-02-02 Dainippon Printing Co Ltd 光学積層体、偏光板及び画像表示装置
JP2014035365A (ja) * 2012-08-07 2014-02-24 Toyobo Co Ltd 偏光子保護用ポリエステルフィルム
KR20140031103A (ko) * 2012-09-03 2014-03-12 주식회사 엘지화학 하드코팅 필름을 포함하는 편광판

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KR20160040051A (ko) 2016-04-12

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