KR102026881B1 - Correcting method for pressed area of the polarizer or protective film - Google Patents

Correcting method for pressed area of the polarizer or protective film Download PDF

Info

Publication number
KR102026881B1
KR102026881B1 KR1020130060139A KR20130060139A KR102026881B1 KR 102026881 B1 KR102026881 B1 KR 102026881B1 KR 1020130060139 A KR1020130060139 A KR 1020130060139A KR 20130060139 A KR20130060139 A KR 20130060139A KR 102026881 B1 KR102026881 B1 KR 102026881B1
Authority
KR
South Korea
Prior art keywords
film
polarizer
protective film
pressed part
treatment
Prior art date
Application number
KR1020130060139A
Other languages
Korean (ko)
Other versions
KR20140140149A (en
Inventor
조천희
김대철
유현선
Original Assignee
동우 화인켐 주식회사
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 동우 화인켐 주식회사 filed Critical 동우 화인켐 주식회사
Priority to KR1020130060139A priority Critical patent/KR102026881B1/en
Publication of KR20140140149A publication Critical patent/KR20140140149A/en
Application granted granted Critical
Publication of KR102026881B1 publication Critical patent/KR102026881B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • 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
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J11/40—Layers for protecting or enhancing the electron emission, e.g. MgO layers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Polarising Elements (AREA)

Abstract

The present invention relates to a method for correcting a pressed part of a polarizer or a protective film, and more particularly, to a surface on which a pressed part of a polarizer or a protective film is formed by applying a photocurable resin composition comprising a polar wettability improving agent, wherein the composition is By filling the pressed portion, the pressed portion of the polarizer or the protective film can be corrected, thereby reducing the discrimination of a good polarizing plate, and thus, the method of correcting the pressed portion of the polarizer or the protective film can significantly improve the process efficiency. It is about.

Description

Correction method of pressed part of polarizer or protective film {Correcting method for pressed area of the polarizer or protective film}

The present invention relates to a method for correcting the pressed part of the polarizer or the protective film.

Along with the development of various image display devices such as liquid crystal display (LCD) and plasma display (PDP), research has been conducted to provide a polarizing plate having high polarization and transmittance in order to provide an image with excellent color reproducibility with high brightness. Has been. In general, a polarizing plate has a basic structure in which a polyvinyl alcohol (PVA) polarizer dyed with a dichroic dye or iodine and a acetylene (cellulose-based) protective film for protecting both sides of the polarizer are laminated. According to the display device, a retardation plate, a viewing angle compensation film, a brightness enhancement film, and the like may be additionally stacked on the protective film.

Such polarizers and protective films may develop pressed areas during the manufacturing process or handling, which does not affect the performance of the product.

However, since the polarizing plate is bonded to the display panel unit, the final product has a structure in which an adhesive layer and a release film are laminated on the protective film side bonded to the panel unit, and the defect discrimination inspection is performed in this state, so that the pressed polarizer is generated. Or in the case of a polarizing plate including a protective film there is a problem that is determined as defective even if there is no problem in the performance of the product.

Korean Patent Laid-Open No. 2012-122300 discloses a method for automatically inspecting a polarizer stain using color difference analysis.

Korean Laid-Open Patent No. 2012-122300

An object of the present invention is to provide a method of correcting a pressed part of a polarizer or a protective film which can suppress that a good polarizing plate is judged to be defective.

1. A method of correcting a pressed part of a polarizer or a protective film by applying a photocurable resin composition comprising a polar wettability improving agent to one surface on which a pressed part of a polarizer or a protective film is formed, so that the composition fills the pressed part.

2. In the above 1, the polarizer polyvinyl alcohol film, polyvinyl alcohol film dehydrated, polyvinyl alcohol film dehydrochlorinated, polyethylene terephthalate film, ethylene-vinyl acetate copolymer film, ethylene-vinyl alcohol air A method for correcting the pressed part of a polarizer or a protective film which is a coalesced film, a cellulose film or a partially gummed film thereof.

3. In the above 1, the protective film is a polyester film, cellulose film, polycarbonate film, acrylic film, styrene film, polyolefin film, vinyl chloride film, polyamide film, imide film, Sulfone film, polyether ketone film, polyphenylene sulfide film, vinyl alcohol film, vinylidene chloride film, vinyl butyral film, allylate film, polyoxymethylene film, urethane film, epoxy film or Method for correcting the pressed part of the polarizer or the protective film which is a silicone film.

4. In the above 1, wherein the protective film is a polarizer that is performed on the surface to be bonded to the polarizer primer treatment, plasma treatment, corona treatment, alkali treatment (soap treatment) and low pressure UV treatment selected from the group consisting of. Or correction method of the pressed part of the protective film.

5. In the above 1, wherein the polar wettability improver is water or alcohol polarization or correction method of the pressed part of the protective film.

6. In the above 1, wherein the polar wettability improver correction method of the pressed part of the polarizer or the protective film is contained in 0.5 to 10 parts by weight with respect to 100 parts by weight of the composition.

7. Correcting the pressed part of the polarizer or the protective film by the method of any one of the above 1 to 6; And laminating the polarizer or the protective film whose pressed portion is corrected in the order of the polarizer, the photocurable resin layer, and the protective film, and curing the resin layer to bond the polarizer and the protective film.

The present invention can correct the pressed portion of the polarizer or the protective film, it is possible to reduce the determination of a good polarizing plate is defective, thereby significantly improving the process efficiency.

Figure 1 shows a process for correcting the pressed part of the polarizer according to an embodiment of the present invention.
2 is a process flowchart showing one embodiment of a method of manufacturing a polarizing plate of the present invention.
3 is a process flowchart showing an embodiment of the method of manufacturing a polarizing plate of the present invention.
4 is a cross-sectional view of a polarizing plate manufactured according to an embodiment of the present invention.
FIG. 5 is a photograph showing whether or not protrusion of a portion corresponding to a portion marked and marked with a name pen in the release film of the polarizing plate manufactured in Example 1 is observed.
FIG. 6 is a photograph showing whether or not protrusion of a portion corresponding to a portion marked and marked with a name pen in the release film of the polarizing plate manufactured in Comparative Example 1 is observed.

The present invention is to apply a photocurable resin composition comprising a polar wettability improver to one surface on which the pressed portion of the polarizer or the protective film is formed, to correct the pressed portion of the polarizer or the protective film by filling the pressed portion of the composition, Since it is possible to reduce the determination that the good polarizing plate is defective, the present invention relates to a method of correcting the pressed part of the polarizer or the protective film which can significantly improve the process efficiency.

In the polarizer and the protective film, the pressed part may be caused by thickness variation in the manufacturing process or external impact that may be applied during handling. When the polarizing plate including the polarizer and the protective film formed with such a pressed part is applied to the display panel, there is no particular problem in the performance of the product.

However, since the polarizing plate is adhered to the display panel part, the final product has a stacked structure in order of polarizer, protective film, adhesive layer, and release film, and thus the defect determination test is performed in the laminated state to the release film. The polarizer having a polarizer or a protective film formed thereon is shown to be protruding a portion corresponding to the pressed part on the release film when viewed from the release film side, there is a problem that is determined to be defective.

In order to solve this problem, the present invention was applied to the photocurable resin composition comprising a polar wettability improver on one surface of the polarizer or the pressing portion of the protective film, so that the composition to fill the pressing portion. Thereby, it can suppress that a good polarizing plate is discriminated as defective.

Hereinafter, the present invention will be described in detail.

The method of correcting the pressed part of the polarizer or the protective film of the present invention by applying a photocurable resin composition comprising a polar wettability improver on one surface of the pressed part of the polarizer or the protective film, so that the composition fills the pressed part.

1 schematically illustrates an embodiment of the present invention for correcting a pressed part by applying a photocurable resin composition including a polar wettability improving agent. Thus, the pressed part of the polarizer 100 is formed according to the present invention. When the photocurable resin composition including the polar wettability improving agent is applied, the photocurable resin composition having improved wettability may be filled to compensate for the pressed portion.

The polarizer 100 according to the present invention may be a polarizer commonly used in the art prepared according to a process including a step 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. Among them, polyvinyl alcohol-based films are preferred in that they are excellent in effect of enhancing uniformity in polarization degree and excellent in dyeing affinity for iodine.

The thickness of the film for polarizer formation is not specifically limited, For example, it may be 10-150 micrometers.

The protective film 300 is not particularly limited as long as the film is excellent in transparency, mechanical strength, thermal stability, moisture shielding, and isotropy. Specifically, polyester film, such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate; Cellulose films such as diacetyl cellulose and triacetyl cellulose; Polycarbonate film; Acrylic films such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene films such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin-based films such as cycloolefin, cycloolefin copolymer, polynorbornene, polypropylene, polyethylene, and ethylene propylene copolymer; Vinyl chloride film; Polyamide films such as nylon and aromatic polyamides; Imide film; Sulfone film; Polyether ketone film; Sulfided polyphenylene-based films; Vinyl alcohol film; Vinylidene chloride-based film; Vinyl butyral film; Allylate film; Polyoxymethylene film; Urethane film; Epoxy film; Silicone film etc. are mentioned. Among these, especially the cellulose type film which has the surface saponified by saponification by alkali etc. is preferable in consideration of polarization characteristic or durability. The protective film may also have an optical compensation function such as a phase difference function.

The thickness of the protective film 300 is not particularly limited, for example, may be 10 to 200㎛, preferably 10 to 150㎛.

The protective film 300 is bonded to one surface of the polarizer 100 when used as a polarizing plate, the bonding process for improving the bonding strength may be performed on the surface to be bonded to the polarizer 100.

The easy bonding process is not particularly limited as long as it can improve the bonding strength between the polarizer 100 and the protective film 300, and for example, dry treatment such as primer treatment, plasma treatment, corona treatment, etc .; Chemical treatments such as alkali treatment (saponification treatment); Low pressure UV treatment; and the like.

The photocurable resin composition according to the present invention is applied to one surface on which the pressed part of the polarizer or the protective film is formed. The photocurable resin composition according to the present invention is applied to one side on which the pressed part is formed to fill the pressed part, thereby solving the problem of projecting visible after the release film is bonded later. To this end, the photocurable resin composition according to the present invention includes a polar wettability improving agent.

The polar wettability improver improves the wettability of the photocurable resin composition to spread like a film when applied to the polarizer 100 or the protective film 300 so as to wet the surface well. This allows the composition to fill in the pressed area.

The polar wettability improving agent included in the photocurable resin composition of the present invention is not particularly limited as long as it can play the above role by improving the wettability of the composition, and may be, for example, water, alcohol, etc. In terms of aspect, it may be water. These can be used individually or in mixture of 2 or more types.

The alcohol is not particularly limited, and examples thereof include methanol, ethanol, propanol, butanol, t-butanol, isopropanol, ethylene glycol, propylene glycol, glycerol and the like.

The content of the polar wettability improving agent is not particularly limited and may be appropriately selected so as to have compatibility in a photocurable resin composition which is usually hydrophobic while sufficiently exhibiting a wettability improving effect, for example, from 0.5 to 100 parts by weight of the resin composition. It may be included in 10 parts by weight. If the content of the polar wettability improver is 0.5 to 10 parts by weight, it is possible to maximize the wettability improvement effect and excellent compatibility.

The photocurable resin composition is a resin composition which is cured by irradiation of light, is excellent in adhesiveness with a polarizer or a protective film, is a resin composition, and may include a photopolymerizable compound and a photopolymerization initiator.

The photopolymerizable compound may be an optical radical polymerizable compound or a photo cationic polymerizable compound.

As a radical photopolymerizable compound, a 1-6 functional monomer is mentioned, Specifically, methyl (meth) acrylate, allyl methacrylate, 2-ethoxyethyl (meth) acrylate, isodecyl (meth) acrylate , 2-dodecylthioethyl methacrylate, octyl acrylate, 2-methoxyethyl acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, Isooctyl (meth) acrylate, isodecyl (meth) acrylate, stearyl (meth) acrylate, tetraperfuryl (meth) acrylate, phenoxyethyl (meth) acrylate, urethane acrylate, aminoethyl (meth Monofunctional monomers such as) acrylate and dimethylaminoethyl (meth) acrylate; 1,3-butanedioldi (meth) acrylate, 1,4-butanedioldi (meth) acrylate, 1,6-hexanedioldi (meth) acrylate, ethylene glycoldi (meth) acrylate, bisphenol A-ethylene Glycol diacrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (meth) Acrylate, neopentyl glycol di (meth) acrylate, dicyclopentanyldi (meth) acrylate, caprolactone modified dicyclopentenyldi (meth) acrylate, ethylene oxide modified phosphate di (meth) acrylate, bis (2 -Hydroxyethyl) isocyanurate di (meth) acrylate, di (acryloxyethyl) isocyanurate, allylated cyclohexyldi (meth) acrylate, dimethyloldicyclopentanediacrylate , Ethylene oxide-modified hexahydrophthalic acid diacrylate, tricyclodecane dimethanol diacrylate, neopentyl glycol-modified trimethylolpropane diacrylate, adamantyl bifunctional monomers such as tandi acrylate; Trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane Trifunctional monomers such as tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, and glycerol tri (meth) acrylate ; Tetrafunctional monomers such as diglycerin tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate; Pentafunctional monomers such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And six-functional monomers such as caprolactone-modified dipentaerythritol hexa (meth) acrylate, and the like, and among these, 1-3 functional monomers are preferable. These can be used individually or in mixture of 2 or more types.

As a photocationic polymerizable compound, Bisphenol-type epoxy resins, such as a bisphenol-A epoxy resin and a bisphenol F-type epoxy resin; Novolak-type epoxy resins, such as a phenol novolak-type epoxy resin and a cresol novolak-type epoxy resin; Aliphatic epoxy resins, alicyclic epoxy resins, naphthalene type epoxy resins, polyfunctional epoxy resins, biphenyl type epoxy resins, glycidyl ether type epoxy resins, glycidyl ester type epoxy resins, glycidylamine type epoxy resins; Alcohol type epoxy resins such as hydrogenated bisphenol A type epoxy resins; Halogenated epoxy resins such as brominated epoxy resins; Epoxy group-containing compounds such as rubber-modified urethane resins, urethane-modified epoxy resins, epoxidized polybutadienes, epoxidized styrene-butadiene-styrene block copolymers, epoxy group-containing polyester resins, epoxy group-containing polyurethane resins and epoxy group-containing acrylic resins; Phenoxymethyloxetane, 3,3-bis (methoxymethyl) oxetane, 3,3-bis (phenoxymethyl) oxetane, 3-ethyl-3- (phenoxymethyl) oxetane, 3-ethyl- 3- (2-ethylhexyloxymethyl) oxetane, 3-ethyl-3-{[3- (triethoxysilyl) propoxy] methyl} oxetane, phenol novolac oxetane, 1,4-bis {[ Oxetanyl-group containing compounds, such as (3-ethyl 3- oxetanyl) methoxy] methyl} benzene, etc. are mentioned, These can be used individually or in mixture of 2 or more types.

The photopolymerization initiator is for improving the efficiency of the curing reaction, and may include photo radical polymerization initiators such as acetophenone series, benzophenone series, thioxanthone series, benzoin series and benzoin alkyl ether series; Aromatic diazonium salt, aromatic sulfonium salt, aromatic iodide aluminum salt, benzoin sulfonic acid ester, etc. are mentioned. As photocationic polymerization initiators, commercially available products, Oputoma-SP-151, Oputoma-SP-170, Oputoma-SP-171 (Asahi Telephone Co., Ltd.), Igacure-261 (Shiba Corporation), and Seaside SI -60L, UVI-6990 (Union Carbide Corporation), BBI-1C3, MPI-103, TPS-103, DTS-103, NAT-103, NDS-103 (Midori Chemical Co., Ltd.), CPI-110A (San Eprosa), etc. You can also listen. These can be used individually or in mixture of 2 or more types.

The content of the photopolymerization initiator is not particularly limited, and may be included in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the photopolymerizable compound. When the content is within the above range, it has an appropriate curing rate and has excellent durability.

The coating method of the photocurable resin composition is not particularly limited and a method known in the art may be used, for example, a bar coater, an air knife, gravure, a reverse roll, a kiss roll, a spray, a blade, a die coater, casting, and a spin. Methods such as coating can be used.

In addition, the present invention provides a method of manufacturing a polarizing plate comprising a polarizer 100 or a protective film 300, the pressed portion is corrected according to the above method.

2 shows a process flow chart according to an embodiment of the manufacturing method of the polarizing plate of the present invention, with reference to this will be described in detail the manufacturing method of the polarizing plate of the present invention.

First, the pressed part of the polarizer 100 or the protective film 200 is corrected according to the method of correcting the pressed part.

Next, the polarizer 100 or the protective film 300 whose pressed portion is corrected is laminated in the order of the polarizer 100, the photocurable resin layer 200a, and the protective film 300.

The protective film 300 may be laminated on one or both surfaces of the polarizer 100.

3 shows a process flow chart when the protective film 300 is laminated on both sides of the polarizer 100, in which case the photocurable resin composition is bonded to the other side or one surface of the polarizer 100 ( 300 may be applied to one surface.

Thereafter, the photocurable resin layer 200a is cured to bond the polarizer 100 and the protective film 300.

Curing of the photocurable resin layer 200a is performed by ultraviolet irradiation, and the irradiation method is not particularly limited, and for example, low pressure mercury lamp, medium pressure mercury lamp, high pressure mercury lamp, ultra high pressure mercury lamp, microwave mercury lamp, chemical lamp, black light lamp Using a metal halide lamp or the like, a light source having a light emission distribution at a wavelength of 400 nm or less can be irradiated with an integrated light amount of 10 to 5,000 mJ / cm.

In addition, the manufacturing method of the polarizing plate of the present invention comprises the steps of forming an adhesive layer on one surface of the protective film bonded to the display panel portion; And bonding a release film on the adhesive layer.

4 illustrates an embodiment of a polarizing plate manufactured according to the above method.

The adhesive layer 400 is a layer bonded to the display panel unit, and is formed by applying an adhesive composition to one surface of the protective film 300 on the side bonded to the display panel unit.

The pressure-sensitive adhesive composition is not particularly limited and may be used pressure-sensitive adhesive composition commonly used in the art, for example, pressure-sensitive adhesive composition containing acrylic resin, silicone resin, styrene resin, polyester resin, rubber resin, urethane resin and the like. Can be used. These can be used individually or in mixture of 2 or more types.

The coating method of an adhesive composition can use the same method as the coating method of the said photocurable resin composition.

Thereafter, the release film 500 is bonded onto the adhesive layer 400.

The release film 500 is a film for protecting the adhesive layer 400, and specifically, a polyolefin film, a polyester film, an acrylic film, a styrene film, an amide film, a polyvinyl chloride film, and a polyvinylidene chloride film. The polycarbonate film etc. can be mentioned, These may be what was suitably released by silicone type, a fluorine type, a silica powder, etc.

In the polarizing plate manufactured according to the above method, the pressed portion of the polarizer 100 or the protective film 300 is corrected, and the portion corresponding to the pressed portion on the release film 500 is projected when the release film 500 is recognized. No visible phenomenon occurs. Thereby, the good polarizing plate can be prevented from being judged as defective, and process efficiency can be improved.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but these examples are merely illustrative of the present invention and are not intended to limit the scope of the appended claims, which are within the scope and spirit of the present invention. It is apparent to those skilled in the art that various changes and modifications can be made to the present invention, and such modifications and changes belong to the appended claims.

Example  And Comparative example

(One) Polarizer  Produce

A 75 μm thick polyvinyl alcohol film having an average degree of polymerization of 2,400 and a saponification degree of 99.9 mol% or more was uniaxially stretched by about 5 times dry, and immersed in water (distilled water) at 60 ° C. for 1 minute while maintaining the stretched state. After immersion for 60 seconds in an aqueous solution of 28 ℃ having a weight ratio of iodine / potassium iodide / distilled water of 0.05 / 5/100. Thereafter, the weight ratio of potassium iodide / boric acid / distilled water was immersed in an aqueous 72 ° C. solution having a ratio of 8.5 / 8.5 / 100 for 300 seconds, washed for 20 seconds with distilled water at 26 ° C., and dried at 65 ° C. to give iodine adsorption-oriented polarizer. Was prepared.

(2) Preparation of Polarizing Plate

The corona discharge process was performed to the surface joined with the polarizer of the stretched norbornene type protective film (thickness 70 micrometers) and the polymethyl methacrylate film (thickness 70 micrometers) which marked the pressed part of the bonding surface with a name pen.

Thereafter, a photocurable resin composition having a content and composition shown in Table 1 below was applied to the corona discharge treatment surface of the stretched norbornene-based resin film with a bar coater at a thickness of 3 μm, and the polarizer was laminated thereon.

The photocurable resin composition was also apply | coated also to the polymethylmethacrylate film, and it laminated | stacked on the other surface of the polarizer.

Subsequently, the laminate was irradiated with ultraviolet rays at a UVA reference accumulated light amount of 300 mJ / cm 2 from one surface by an ultraviolet irradiation device (Fusion Fusion H valve) with a belt conveyor to cure the resin layer to form a polarizer and a protective film. The polarizing plate was manufactured by bonding.

The composition of the photocurable resin composition in each Example and the comparative example is as Table 1 below.

division Photopolymerizable compound
(A) Photopolymerization initiator
(B) Polar wetting improver
(C) ingredient content ingredient content ingredient content Example 1 A-1 / A-2 47/50 B-1 3 C-1 2 Example 2 A-1 / A-2 47/50 B-1 3 C-1 One Example 3 A-1 / A-2 47/50 B-1 3 C-1 3 Example 4 A-1 / A-2 47/50 B-1 3 C-1 5 Example 5 A-1 / A-2 47/50 B-1 3 C-1 7 Example 6 A-1 / A-2 47/50 B-1 3 C-2 One Example 7 A-1 / A-2 47/50 B-1 3 C-2 3 Example 8 A-1 / A-2 47/50 B-1 3 C-2 5 Example 9 A-1 / A-2 47/50 B-1 3 C-2 10 Example 10 A-3 / A-4 45/50 B-2 5 C-1 2 Example 11 A-3 / A-4 45/50 B-2 5 C-2 3 Example 12 A-3 / A-4 45/50 B-2 5 C-3 3 Example 13 A-2 / A-4 48/47 B-1 / B-2 2/3 C-1 2 Example 14 A-1 / A-4 48/47 B-1 / B-2 2/3 C-1 2 Comparative Example 1 A-1 / A-2 47/50 B-1 3 - - Comparative Example 2 A-3 / A-4 45/50 B-2 5 - - Comparative Example 3 A-2 / A-4 48/47 B-1 / B-2 2/3 - - A-1: phenoxy glycidyl ether
A-2: 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate
A-3: 4-hydroxybutyl acrylate
A-4: dimethylaminoethyl acrylate
B-1: CPI-110A (San Eprosa)
B-2: Irg184 (Shibasa)
C-1: water
C-2: propanol
C-3: propylene glycol

Experimental Example

(1) adhesive evaluation

After the polarizing plates prepared in Examples and Comparative Examples were left at room temperature for 1 hour, when the blade of the cutter was pushed between the polarizer and the protective film, the adhesiveness between the polarizer and the protective film was evaluated to the extent that the blade enters.

◎: Cutter blade does not enter between polarizer and protective film

○: cutter blade enters 2 mm or less between polarizer and protective film

(Triangle | delta): The blade of a cutter enters more than 2 mm-5 mm or less between a polarizer and at least one protective film.

X: The blade of the cutter goes all the way between the polarizer and at least one protective film

(2) Hot water resistance  evaluation

After leaving the polarizing plates prepared in the above Examples and Comparative Examples for 24 hours at 23 ° C. and 55% RH, a 5 cm × 2 cm sample was prepared with the absorption axis (stretching direction) on the long side. Thereafter, the short sides of the samples were gripped, and 80% of the longitudinal direction was immersed in a 60 ° C. water bath for 4 hours, and then removed to wipe off moisture.

Since the polarizer shrinks by immersion in warm water, the distance from the end of the protective film in the center of the short side of the sample to the contracted polarizer was measured to make the shrinkage length.

In addition, since iodine eluted from the periphery part of a polarizer and discolored by warm water immersion, the distance from the contracted polarizer end of the short side of a sample to the part which has not been discolored was made into the iodine stripping length.

The sum of the contraction length and the iodine omission length was taken as the total erosion length. That is, the total erosion length is the distance from the end of the protective film at the center of the short side of the sample to the undiscolored portion of the polarizer. The smaller the immersion length, the better the water resistance.

◎ ： Total erosion length is less than 2mm

○: Total erosion length is 2 mm or more but less than 3 mm

△: Total erosion length is 3 mm or more and less than 5 mm

X: Total erosion length is 5mm or more

(3) evaluation of protrusion visual recognition

In the polarizing plates prepared in Examples and Comparative Examples, after performing a corona treatment on the side of the protective film bonded to the panel portion, a roll laminator (25 degrees, speed 5m / min) of the release film on the protective film with an acrylic double-sided adhesive It bonded by using.

After that, in the reflection mode (x100 times) of the optical microscope (SMZ800, Nikon Corporation), it was evaluated whether the part corresponding to the part marked with a name pen on the release film was recognized as projecting.

In addition, the part corresponding to the marking-marked part in the release film of the polarizing plate of Example 1 and the comparative example 1 was image | photographed (refer FIG. 5 and 6).

○: The projection is not recognized

△: recognized as projecting fine

X ： admitted as having been extruded

division Adhesive Hot water resistance Salient poet evaluation Norbornene-based protective film Polymethylmethacrylate Protective Film Example 1 ◎ ○ ○ △ Example 2 ◎ ○ △ △ Example 3 ◎ ○ ○ ○ Example 4 ○ ○ ○ ○ Example 5 ○ △ ○ ○ Example 6 ◎ ○ △ △ Example 7 ◎ ○ ○ △ Example 8 ◎ ○ ○ ○ Example 9 ◎ ○ ○ ○ Example 10 ◎ △ ○ △ Example 11 ○ ○ ○ △ Example 12 ○ △ ○ ○ Example 13 ◎ ○ ○ △ Example 14 ○ ○ ○ △ Comparative Example 1 ◎ ○ X X Comparative Example 2 ○ △ X X Comparative Example 3 ◎ ○ X X

Referring to Table 2, the polarizing plates of Examples 1 to 14 were not visible or only visible to a minute extent in the part corresponding to the pressed part of the protective film in the release film, it was confirmed that the pressed part is corrected. Adhesion and hot water resistance were also excellent.

Referring to FIG. 5, it can be seen that the polarizing plate of Example 1 looks flat without any protruding portions of the release film.

However, it was recognized that the polarizing plates of Comparative Examples 1 to 3 protruded.

Referring to FIG. 6, it can be seen that the polarizing plate of Comparative Example 1 is recognized as a protruding portion of the release film.

100: polarizer 200a: photocurable resin layer
200b: cured photocurable resin layer 300: protective film
400: adhesive layer 500: release film

Claims (7)

A photocurable resin composition comprising a polar wettability improving agent, a photopolymerizable compound, and a photopolymerization initiator is applied to one surface on which the pressed part of the polarizer or the protective film is formed, so that the composition fills the pressed part,
The polar wettability improving agent includes water or an alcohol and is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the composition, the method of correcting the pressed part of the polarizer or the protective film.
The method of claim 1, wherein the polarizer is a polyvinyl alcohol film, a polyvinyl alcohol film dehydrated, a polyvinyl alcohol film desalted, a polyethylene terephthalate film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film , A cellulose film or a partially gumified film thereof, a method of correcting a pressed part of a polarizer or a protective film.
The method of claim 1, wherein the protective film is a polyester film, cellulose film, polycarbonate film, acrylic film, styrene film, polyolefin film, vinyl chloride film, polyamide film, imide film, sulfone Film, polyether ketone film, polyphenylene sulfide film, vinyl alcohol film, vinylidene chloride film, vinyl butyral film, allylate film, polyoxymethylene film, urethane film, epoxy film or silicone film Correction method of pressed part of phosphor polarizer or protective film.
The method according to claim 1, wherein the protective film is a polarizer or protection that is performed on the surface to be bonded to the polarizer is easy treatment selected from the group consisting of primer treatment, plasma treatment, corona treatment, alkali treatment (soap treatment) and low pressure UV treatment. Method of correction of the pressed part of the film.
delete delete Correcting the pressed part of the polarizer or the protective film by the method of any one of claims 1 to 4; And
Method of manufacturing a polarizing plate comprising the step of laminating a polarizer or a protective film of the pressed portion is corrected in the order of a polarizer, a photocurable resin layer, a protective film, and curing the resin layer.
KR1020130060139A 2013-05-28 2013-05-28 Correcting method for pressed area of the polarizer or protective film KR102026881B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130060139A KR102026881B1 (en) 2013-05-28 2013-05-28 Correcting method for pressed area of the polarizer or protective film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130060139A KR102026881B1 (en) 2013-05-28 2013-05-28 Correcting method for pressed area of the polarizer or protective film

Publications (2)

Publication Number Publication Date
KR20140140149A KR20140140149A (en) 2014-12-09
KR102026881B1 true KR102026881B1 (en) 2019-10-01

Family

ID=52458082

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130060139A KR102026881B1 (en) 2013-05-28 2013-05-28 Correcting method for pressed area of the polarizer or protective film

Country Status (1)

Country Link
KR (1) KR102026881B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008257199A (en) * 2007-03-15 2008-10-23 Sumitomo Chemical Co Ltd Photocurable adhesive agent, polarizing plate using the photocurable adhesive agent, method for production of the polarizing plate, optical member, and liquid crystal display device
JP2012118201A (en) 2010-11-30 2012-06-21 Sumitomo Chemical Co Ltd Optical film and polarizing plate using the same
JP2013061365A (en) 2011-09-12 2013-04-04 Konica Minolta Advanced Layers Inc Polarizer plate protection film and polarizer plate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7695780B2 (en) * 2004-02-26 2010-04-13 Fujifilm Corporation Optical film, optical compensation sheet, polarizing plate, and liquid crystal display device
TW200632002A (en) * 2004-11-30 2006-09-16 Fuji Photo Film Co Ltd Polarizing plate and liquid crystal display device comprising the same
KR20110038977A (en) * 2009-10-09 2011-04-15 동우 화인켐 주식회사 Adhesive composition and polarizing plate using the same
KR101440974B1 (en) 2011-04-28 2014-09-17 주식회사 엘지화학 Automatic inspection method for stain in the polarizing plate using color difference analysis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008257199A (en) * 2007-03-15 2008-10-23 Sumitomo Chemical Co Ltd Photocurable adhesive agent, polarizing plate using the photocurable adhesive agent, method for production of the polarizing plate, optical member, and liquid crystal display device
JP2012118201A (en) 2010-11-30 2012-06-21 Sumitomo Chemical Co Ltd Optical film and polarizing plate using the same
JP2013061365A (en) 2011-09-12 2013-04-04 Konica Minolta Advanced Layers Inc Polarizer plate protection film and polarizer plate

Also Published As

Publication number Publication date
KR20140140149A (en) 2014-12-09

Similar Documents

Publication Publication Date Title
KR101494043B1 (en) Adhesive for polarizing plate and polarizing plate comprising the same
KR101908172B1 (en) Method for manufacturing laminated film
TWI724076B (en) Manufacturing method of optical film
KR101938411B1 (en) Polarizing plate
CN108351454B (en) Polarizing plate and image display device including the same
KR20160054229A (en) Process for Preparing Polarizer
KR20110131512A (en) Polarizing plate and method for preparing the same
CN112334799B (en) Polarizer, polarizing film, optical film, and image display device
KR102587187B1 (en) Method for producing polarizing plate
JP6257680B2 (en) Manufacturing method of polarizing film, laminated film
KR102443829B1 (en) Optical laminate
KR102026881B1 (en) Correcting method for pressed area of the polarizer or protective film
TWI646349B (en) Method for manufacturing polarizer
KR102024733B1 (en) Method of manufacturing polarizing plate
KR20140091217A (en) Preparing method for polarizing plate
KR101745989B1 (en) Polarizing plate
KR20130074942A (en) Method for preparing polarizing plate, polarizing plate, and display device comprising the same
WO2020110538A1 (en) Polarizing plate
CN112969940A (en) Polarizing plate
KR101988982B1 (en) Polarizing plate and preparing method thereof
CN112334798B (en) Polarizer, polarizing film, optical film, and image display device
KR20160107458A (en) Adhesive composition and polarizing plate using the same
KR102388999B1 (en) Process for Preparing Polarizing Plate
KR20150031350A (en) Adhesive composition for polarizing plate
JP2022077996A (en) Polarizing plate and image display device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant