WO2012026560A1 - 光学部材及びその用途 - Google Patents

光学部材及びその用途 Download PDF

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Publication number
WO2012026560A1
WO2012026560A1 PCT/JP2011/069240 JP2011069240W WO2012026560A1 WO 2012026560 A1 WO2012026560 A1 WO 2012026560A1 JP 2011069240 W JP2011069240 W JP 2011069240W WO 2012026560 A1 WO2012026560 A1 WO 2012026560A1
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WO
WIPO (PCT)
Prior art keywords
optical member
weight
adhesive
image display
adhesive layer
Prior art date
Application number
PCT/JP2011/069240
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English (en)
French (fr)
Japanese (ja)
Inventor
知浩 福浦
井上　登士哉
Original Assignee
住友化学株式会社
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Application filed by 住友化学株式会社 filed Critical 住友化学株式会社
Priority to CN201180040558.7A priority Critical patent/CN103097923B/zh
Priority to KR1020137007147A priority patent/KR101780849B1/ko
Publication of WO2012026560A1 publication Critical patent/WO2012026560A1/ja

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    • G02B1/105—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/13332—Front frames
    • 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
    • G02F1/133502—Antiglare, refractive index matching layers
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention is used in an image display device that includes an optical member, a transparent protective member, and an adhesive layer interposed therebetween, and further includes an image display unit on the side opposite to the adhesive layer of the optical member.
  • the present invention relates to the optical member.
  • an image display unit such as a liquid crystal cell in an image display device such as a liquid crystal display (LCD), an organic electroluminescence display (ELD), a plasma display (PDP), a surface electric field display (SED), a field emission display (FED)
  • an optical member such as a polarizing plate, an antiglare film or an antireflection film is disposed, and a transparent protective member made of glass or the like is disposed through an adhesive layer in order to protect them.
  • an adhesive is dropped on the optical member and then spread, and then the transparent protective member is brought down and superimposed, and then the adhesive is cured to integrate them. It is known (JP2005-55641A).
  • an object of the present invention is to provide an optical member that can suppress defects in appearance due to bubbles generated between the optical member and the transparent protective member.
  • the present invention includes the following.
  • the above-described image display device including an optical member, a transparent protective member, and an adhesive layer interposed therebetween, and further including an image display unit on the side opposite to the adhesive layer of the optical member.
  • Evaluation adhesive 10 ⁇ l comprising isoprene polymer as a main component and containing 14% by weight of dicyclopentenyloxyethyl methacrylate, 8% by weight of benzyl methacrylate, 2% by weight of methyl methacrylate and 0.2% by weight of a photopolymerization initiator Is dropped on the surface of the optical member, and the contact angle between the optical member and the evaluation adhesive when left for 5 minutes is 55 ° or less.
  • optical member according to [1] which further satisfies the following condition (2).
  • An evaluation adhesive comprising an isoprene polymer as a main component and comprising 14% by weight of dicyclopentenyloxyethyl methacrylate, 8% by weight of benzyl methacrylate, 2% by weight of methyl methacrylate and 0.2% by weight of a photopolymerization initiator.
  • the maximum shear stress of the optical member with respect to the adhesive layer in a sample in which the adhesive layer is formed by applying a curing treatment after being applied to the surface of the optical member is 140 N or more.
  • At least one of anti-glare treatment, anti-reflection treatment, hard coat treatment, anti-static treatment, and easy adhesion treatment is performed on the surface interposed by the adhesive layer [1] to The optical member according to any one of [3].
  • a polarizer protective film comprising the optical member according to any one of [1] to [5].
  • a polarizing plate comprising the polarizer protective film according to [5] and a polarizer.
  • An image display device including an optical member, a transparent protective member, and an adhesive layer interposed therebetween, and further including an image display unit on a side opposite to the adhesive layer of the optical member, An image display device in which an optical member satisfies the condition (1).
  • the adhesive layer interposed between the optical member and the transparent protective member is at least one selected from the group consisting of an acrylic resin, a terpene hydrogenated resin, a xylene resin, a butadiene polymer, and an isoprene polymer.
  • the acrylic resin is at least one polymer selected from the group consisting of an esterified product of polyurethane (meth) acrylate, polyisoprene (meth) acrylate, and polyisoprene (meth) acrylate.
  • the acrylic resin is at least one polymer selected from the group consisting of an esterified product of polyurethane (meth) acrylate, polyisoprene (meth) acrylate, and polyisoprene (meth) acrylate.
  • the (meth) acrylate monomer is selected from methyl (meth) acrylate, benzyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, isobornyl (meth) acrylate and 2-hydroxybutyl (meth) acrylate.
  • optical member is a sheet or film.
  • At least one of an anti-glare treatment, an antireflection treatment, a hard coat treatment, an antistatic treatment, and an easy adhesion treatment is performed on the surface of the optical member that is interposed between the adhesive layers. 13] to [15].
  • an optical member that can suppress defects in appearance due to bubbles generated between the optical member and the transparent protective member, and further, by using the optical member, the appearance defect is reduced.
  • a suppressed image display device can be provided.
  • the optical member of the present invention is used as a member of an image display device, and the image display device includes the optical member of the present invention, a transparent protective member, and an adhesive layer interposed therebetween, Furthermore, an image display unit is provided on the side opposite to the adhesive layer in the optical member.
  • the contact angle measured with a specific evaluation adhesive is not more than a predetermined value.
  • the optical member of the present invention that exhibits a predetermined contact angle as the optical member. By adopting, it becomes possible to suppress the generation of bubbles generated between the optical member and the transparent protective member.
  • the optical member of the present invention satisfies the following condition (1).
  • Evaluation adhesive 10 ⁇ l comprising isoprene polymer as a main component and containing 14% by weight of dicyclopentenyloxyethyl methacrylate, 8% by weight of benzyl methacrylate, 2% by weight of methyl methacrylate and 0.2% by weight of a photopolymerization initiator Is dropped on the surface of the optical member, and the contact angle between the optical member and the evaluation adhesive when left for 5 minutes is 55 ° or less.
  • the evaluation adhesive is an adhesive for evaluating the contact angle of the optical member, and the adhesive layer of the image display device does not necessarily have to be constituted by the adhesive.
  • this evaluation adhesive is composed mainly of an isoprene polymer, 14% by weight of dicyclopentenyloxyethyl methacrylate, 8% by weight of benzyl methacrylate, 2% by weight of methyl methacrylate, and 0.2% of a photopolymerization initiator. It contains weight%.
  • the adhesive for evaluation can contain, as other additives, diphenylphosphine in addition to a solvent such as acetone, 2,4,6-trimethylbenzoic acid, a polymerization regulator such as 1-octanethiol, Specifically, all or most of the components other than the essential components are composed of an isoprene polymer. Since the evaluation adhesive is composed of such a composition, it is transparent and viscous.
  • the optical member of the present invention has a contact angle of 55 ° or less when 10 ⁇ l of the above-mentioned evaluation adhesive is dropped on the surface and left for 5 minutes.
  • this contact angle is measured using an adhesive for evaluation, other than that, it can be measured in the same manner as the so-called contact angle with water.
  • OCA30L manufactured by DataPhysics, Inc. Can be measured.
  • the optical member of the present invention has a contact angle of 55 ° or less, which can suppress the generation of bubbles described above. From the viewpoint of suppressing the generation of such bubbles, the contact angle is preferably 50 ° or less.
  • the optical member of the present invention preferably further satisfies the following condition (2).
  • An evaluation adhesive comprising an isoprene polymer as a main component and comprising 14% by weight of dicyclopentenyloxyethyl methacrylate, 8% by weight of benzyl methacrylate, 2% by weight of methyl methacrylate and 0.2% by weight of a photopolymerization initiator.
  • the maximum shear stress of the optical member with respect to the adhesive layer in a sample in which the adhesive layer is formed by applying a curing treatment after being applied to the surface of the optical member is 140 N or more.
  • the same adhesive as described above is used as the evaluation adhesive.
  • the glass plate 7 is superimposed on the surface on which the adhesive is further applied, and then the active energy rays are applied.
  • an adhesive layer 8 is formed between the optical member 1 and the glass plate 7 to produce a measurement sample.
  • stress is applied at a constant speed in the direction in which the glass plate 6 and the glass plate 7 face each other (arrow direction in FIG. 2), that is, the direction in which the adhesive layer 8 is peeled off from the optical member 1.
  • the maximum value of the observed force is the maximum shear stress.
  • This maximum shear stress can be measured according to JIS K6868-2.
  • an apparatus for measuring the maximum shear stress for example, an autoclave (AG-1) manufactured by Shimadzu Corporation can be used.
  • the maximum shear stress measured in this way means the maximum shear stress of the optical member specified by the condition (2).
  • the maximum shear stress of the optical member is preferably 140 N or more.
  • the adhesiveness between the optical member and the transparent protective member laminated via the adhesive is increased.
  • the transparent protective member becomes larger like a liquid crystal TV.
  • optical member of the present invention examples include plate-like (plate-like), sheet-like, and film-like materials having the specific contact angle described above. preferable.
  • the antiglare treatment, the antireflection treatment, the hard coat treatment, the antistatic treatment, and the primer treatment are preferable, and the film subjected to these treatments is an antiglare film, a light diffusion film, an antireflection film. , A polarizer protective film or a polarizing plate including the same.
  • polarizer protective film or a polarizing plate including the same.
  • the antiglare film is a film for imparting an antiglare function to the image display device, and examples thereof include a film in which a so-called antiglare surface is formed on the surface of a transparent substrate film.
  • the antiglare surface herein include (a) an antiglare layer in which predetermined irregularities are formed on the surface by dispersing translucent fine particles in the translucent resin, and (a) the surface of the translucent resin.
  • an antiglare surface in which predetermined irregularities are directly formed on the surface of a transparent substrate film.
  • the above (a) and (b) are preferable.
  • the transparent base film used for the anti-glare film may be a resin film having appropriate transparency and mechanical strength.
  • cellulose acetate resin such as TAC (triacetyl cellulose), acrylic resin, polycarbonate Resin, polyester resin such as polyethylene terephthalate, and polyolefin resin such as polyethylene and polypropylene.
  • the translucent resin constituting the antiglare layer is not particularly limited as long as it has translucency, for example, cured products of ionizing radiation curable resins such as ultraviolet curable resins and electron beam curable resins, and thermosetting.
  • cured products of ionizing radiation curable resins such as ultraviolet curable resins and electron beam curable resins, and thermosetting.
  • a cured product of a mold resin, a thermoplastic resin, a metal alkoxide polymer, or the like can be used. Among these, a cured product of an ionizing radiation curable resin is preferable.
  • polyfunctional acrylates such as polyhydric alcohol acrylic acid or methacrylic acid ester, polyfunctional acrylate synthesized from diisocyanate and polyhydric alcohol and acrylic acid or methacrylic acid hydroxy ester, etc. And urethane acrylate.
  • polyether resins having an acrylate functional group polyester resins, epoxy resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and the like can also be used.
  • a photopolymerization initiator when an ultraviolet curable resin is used, a photopolymerization initiator is usually added.
  • a photoinitiator is suitably selected according to resin to be used.
  • the photopolymerization initiator radiation polymerization initiator
  • benzoin such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzyl methyl ketal, and alkyl ethers thereof are used.
  • thermosetting resin examples include a thermosetting urethane resin composed of an acrylic polyol and an isocyanate prepolymer, a phenol resin, a urea melamine resin, an epoxy resin, an unsaturated polyester resin, and a silicone resin.
  • thermoplastic resin examples include cellulose derivatives such as acetylcellulose, nitrocellulose, acetylbutylcellulose, ethylcellulose, and methylcellulose, vinyl acetate and copolymers thereof, vinyl chloride and copolymers thereof, vinylidene chloride and copolymers thereof, and the like.
  • Resin, acetal resin such as polyvinyl formal, polyvinyl butyral, acrylic resin and its copolymer, acrylic resin such as methacrylic resin and its copolymer, polystyrene resin, polyamide resin, linear polyester resin, polycarbonate resin, etc. it can.
  • a silicon oxide matrix using a silicon alkoxide material as a raw material can be used.
  • alkoxysilane such as tetramethoxysilane and tetraethoxysilane can be converted into an inorganic or organic-inorganic composite matrix by hydrolysis and dehydration condensation.
  • a cured product of ionizing radiation curable resin When a cured product of ionizing radiation curable resin is used as the translucent resin, it is necessary to irradiate with ionizing radiation such as ultraviolet rays and electron beams after being applied to a transparent substrate film and dried. Moreover, when using the hardened
  • Examples of the light-transmitting fine particles include organic fine particles such as acrylic resin, melamine resin, polyethylene, polystyrene, organic silicone resin, and acrylic-styrene copolymer, and calcium carbonate, silica, aluminum oxide, barium carbonate, barium sulfate, and oxide.
  • examples thereof include inorganic fine particles such as titanium and glass, and one or more of these can be used in combination.
  • the kind, particle diameter, refractive index, content, and the like of the light-transmitting fine particles may be appropriately adjusted.
  • a plate-shaped or roll-shaped mold can be used as the mold.
  • a coating material containing a resin material for forming a translucent resin or translucent fine particles is used.
  • a resin material ionizing radiation curable resin, thermosetting resin, metal alkoxide
  • curing is performed using a mold.
  • the coating method of the coating liquid conventionally known methods can be employed, for example, gravure coating method, micro gravure coating method, roll coating method, rod coating method, knife coating method, air knife coating method, kiss coating. Method, die coating method and the like can be used.
  • the coating film is cured by ionizing radiation and / or heat.
  • the ionizing radiation species is not particularly limited, and can be appropriately selected from ultraviolet rays, electron beams, near ultraviolet rays, visible light, near infrared rays, infrared rays, X-rays, etc., depending on the type of translucent resin, Ultraviolet rays and electron beams are preferred, and ultraviolet rays are particularly preferred in that they are easy to handle and high energy can be easily obtained.
  • the light diffusing film is for diffusing light from the image display unit for the purpose of, for example, widening the viewing angle of the image display device. And having a light diffusion layer in which is dispersed.
  • the transparent substrate film the translucent resin, and the translucent fine particles
  • the same materials as those exemplified in the previous antiglare film can be used.
  • the type of transparent substrate film, the type of translucent resin, the type of translucent fine particles, the particle diameter, the refractive index, the content may be adjusted as appropriate.
  • the antireflection film is a film for improving the display quality of the image display device by preventing reflection of external light incident on the surface of the image display device.
  • a low refractive index layer is provided on the outside of the transparent substrate film. It is what you have.
  • a hard coat layer, a high refractive index layer, or a medium refractive index layer can be provided between the transparent substrate film and the low refractive index layer, and a hard coat for imparting scratch resistance to the outermost layer.
  • a layer may be provided.
  • the transparent substrate film here, a film similar to the film exemplified in the previous anti-glare film can be used.
  • the low refractive index layer examples include those containing a binder matrix and inorganic fine particles.
  • a material for forming the binder matrix for example, a mixture containing an ionizing radiation curable resin and a polymerization initiator is irradiated with ionizing radiation to be polymerized and cured, or a hydrolyzate of alkoxysilane is dehydrated. The thing obtained by condensation is mentioned.
  • examples of the inorganic fine particles include LiF (refractive index 1.4), MgF (refractive index 1.4), 3NaF ⁇ AlF (refractive index 1.4), AlF (refractive index 1.4), Na3AlF6 (refractive index). Low refractive fine particles such as 1.33) and hollow silica fine particles.
  • the hard coat layer can be formed by polymerization and curing by irradiating a mixture containing an ionizing radiation curable resin and a polymerization initiator with ionizing radiation.
  • a mixture containing an ionizing radiation curable resin and a polymerization initiator with ionizing radiation.
  • the ionizing radiation curable resin and the polymerization initiator those similar to those exemplified above can be used.
  • the material constituting the high refractive index layer is not particularly limited, and inorganic materials and organic materials can be used.
  • the inorganic material include fine particles such as zinc oxide, titanium oxide, cerium oxide, aluminum oxide, silane oxide, tantalum oxide, yttrium oxide, ytterbium oxide, zirconium oxide, antimony oxide, and indium tin oxide (hereinafter also referred to as ITO). Is mentioned.
  • ITO indium tin oxide
  • the polarizing plate is composed of a polarizer made of polyvinyl alcohol and a polarizer protective film for protecting it.
  • the optical member of the present invention may be a polarizing plate or a polarizer protective film as long as it satisfies the contact angle described above.
  • the polarizer protective film include cellulose acetate resins such as TAC (triacetylcellulose), acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate, and polyolefin resins such as polyethylene and polypropylene.
  • the surface of the resin is preferably subjected to an easy adhesion treatment such as a corona discharge treatment, a glow discharge treatment, a primer treatment, an acid treatment, an alkali treatment, or an ultraviolet irradiation treatment.
  • an easy adhesion treatment such as a corona discharge treatment, a glow discharge treatment, a primer treatment, an acid treatment, an alkali treatment, or an ultraviolet irradiation treatment.
  • polyester resins, polyolefin resins, acrylic resins, and polycarbonate resins that have been subjected to easy adhesion treatment are more preferable from the viewpoint of the maximum shear stress described above.
  • the optical member of the present invention is preferably one whose surface is not subjected to antifouling treatment with a leveling agent or the like.
  • the contact angle of the optical member described above tends to increase.
  • the transparent protective member is a transparent member disposed on the outermost surface on the viewing side of the image display device, and is for physically protecting the image display device.
  • a transparent protective member a widely used glass plate can be used.
  • the adhesive here is for interposing the optical member of the present invention and the transparent protective member, and the same adhesive as conventionally used can also be used.
  • acrylic resin polyurethane (meth) acrylate, polyisoprene (meth) acrylate, esterified product of polyisoprene (meth) acrylate, and the like are preferable.
  • examples of the (meth) acrylic monomer include methyl (meth) acrylate, ethyl (meth) acrylate, hydroxyethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, and 2-hydroxypropyl (meth) acrylate.
  • the adhesive may contain a photopolymerization initiator, a solvent, a polymerization regulator, and the like.
  • the adhesive agent for evaluation mentioned above can also be used as an adhesive agent here.
  • the transparent protective member As a method of forming an adhesive layer between the optical member of the present invention and the transparent protective member, for example, after applying an adhesive on the surface of the optical member, the transparent protective member is overlaid on the surface, and then activated.
  • the method of irradiating an energy ray and performing a hardening process is mentioned.
  • the active energy ray can be appropriately selected from ultraviolet rays, electron beams, near ultraviolet rays, visible light, near infrared rays, infrared rays, X-rays, etc. Among them, ultraviolet rays are preferable.
  • FIG. 1 is a conceptual diagram of the image display apparatus according to the present invention.
  • the image display device 5 includes an image display unit 4, an optical member 1, an adhesive layer 3, and a transparent protective member 2 in this order.
  • the transparent protective member 2 is the viewing side of the image display device 5
  • the image display unit 1 is the light source side (not shown) of the image display device 5.
  • Examples of the image display unit 1 include a liquid crystal panel, an EL panel, and a PDP.
  • the image display device 5 is a liquid crystal display device
  • a rear-side polarizing plate, a prism sheet, a light diffusion sheet, and a backlight device are further arranged on the light source side of the image display unit 4. .
  • Adhesive for evaluation The adhesive for evaluation analyzed as follows by the gas chromatography method was used. Main component: Isoprene polymer Dicyclopentenyloxyethyl methacrylate: 14% by weight Benzyl methacrylate: 8% by weight Methyl methacrylate: 2% by weight Photopolymerization initiator (Irgacure 184): 0.2% by weight Other additives: 0.8% by weight of (meth) acrylate monomer, Acetone, 2,4,6-trimethylbenzoic acid, 1-octanethiol, diphenylphosphine (although these compounds were observed as peaks in gas chromatography analysis, they were below the limit of quantification)
  • the adhesive for evaluation was applied to the surface of the optical member that had been bonded to the glass plate in advance, the glass plate was overlaid on the surface on which the adhesive was further applied.
  • the length of the adhesive coating film in the direction of applying stress was set to about 12.5 mm, and the thickness of the adhesive coating film was adjusted to about 150 ⁇ m.
  • the adhesive was cured by irradiating ultraviolet rays with an integrated light amount of 5000 mJ / cm 2 to form an adhesive layer.
  • the glass plates face each other, that is, in the direction to peel the adhesive layer from the optical member. Stress was applied at a constant speed (5 mm / min) to obtain the maximum shear stress.
  • ⁇ Evaluation of bubble generation> The presence / absence of bubbles between the optical member and the transparent protective member was evaluated as follows. First, a glass plate was used as a transparent protective member. Next, the adhesive for evaluation was diverted as an adhesive for forming an adhesive layer interposed between the optical member and the transparent protective member. Specifically, after an adhesive was applied to the center of the surface of an optical member having a length of 9 cm and a width of 9 cm, a glass plate was overlaid to evaluate the spread of the adhesive. The case where the adhesive spread well without entrapment of bubbles was rated as ⁇ , and the case where some bubbles were encapsulated and the adhesive did not spread well was marked as x.
  • the adhesive spreads well without entrapment of bubbles in the stage where the glass plates are overlaid, then it will have a good appearance even after curing treatment, on the other hand, if entrapment of bubbles, Even if the curing process is performed, bubbles remain and the appearance is poor.
  • Example evaluation 1 The contact angle and the maximum shear stress were evaluated for the film-like optical members (Sample Nos. 1 to 12) having the following configurations. The results are shown in Table 1.
  • Example No. 1 A film having an antiglare layer formed mainly from pentaerythritol tetraacrylate (hereinafter referred to as PETA) or dipentaerythritol hexaacrylate (hereinafter referred to as DPHA) on a triacetylcellulose (hereinafter referred to as TAC) base film.
  • PETA pentaerythritol tetraacrylate
  • DPHA dipentaerythritol hexaacrylate
  • TAC triacetylcellulose
  • Example No. 2 A film-like optical member having an antiglare layer formed mainly from PETA on a TAC substrate film.
  • Example No. 3 A film-like optical member having an antiglare layer formed mainly from PETA and IPDI on a TAC substrate film. When the surface of the optical member was analyzed by TOF-SIMS, the presence of the fluorine-based compound was not confirmed.
  • Example No. 4 A film-like optical member having an antiglare layer formed mainly from PETA and organosiloxane on the TAC substrate film.
  • Example No. 5 A film-like optical member having a hard coat layer formed mainly from PETA and hexamethylene diisocyanate (hereinafter, HDI) on the TAC base film.
  • HDI hexamethylene diisocyanate
  • TAIC tris (2-acryloxyethyl) isocyanurate
  • Example No. 7 -A film-like optical film having an antiglare layer formed mainly from PETA, DPHA, IPDI, 2-hydroxyethyl methacrylate (hereinafter, HEMA) on a TAC substrate film and containing an antistatic agent.
  • HEMA 2-hydroxyethyl methacrylate
  • Example No. 8 A film-like optical member having an antistatic layer on a TAC substrate film and further having an antiglare layer mainly formed of PETA, DPHA, IPDI, HEMA, and TAIC.
  • an antiglare layer mainly formed of PETA, DPHA, IPDI, HEMA, and TAIC.
  • Example No. 9 A film-like optical member having an antistatic layer on a TAC substrate film and further having an antiglare layer mainly formed of PETA, DPHA, IPDI, HEMA, and TAIC.
  • an antiglare layer mainly formed of PETA, DPHA, IPDI, HEMA, and TAIC.
  • Example No. 10 A film-like optical member having an antiglare layer formed mainly from PETA and IPDI on a TAC substrate film.
  • the surface of the optical member was analyzed by TOF-SIMS, the presence of perfluoropolyether was confirmed.
  • Example No. 11 A film-like optical member having an antiglare layer formed mainly from PETA, DPHA, and IPDI on the TAC substrate film and containing an antistatic agent.
  • the surface of the optical member was analyzed by TOF-SIMS, the presence of perfluoropolyether was confirmed.
  • ⁇ Sample evaluation 2> The surface of the PET base film could be subjected to easy adhesion treatment so that the contact angle was 25 ° and the maximum shear stress was 160N.
  • Optical member 2 Transparent protective member 3: Adhesive layer 4: Image display unit 5: Image display device 6, 7: Glass plate 8: Adhesive layer formed from adhesive for evaluation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Polarising Elements (AREA)
PCT/JP2011/069240 2010-08-26 2011-08-19 光学部材及びその用途 WO2012026560A1 (ja)

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JP5477495B2 (ja) * 2012-05-09 2014-04-23 デクセリアルズ株式会社 画像表示装置の製造方法
WO2017026078A1 (ja) * 2015-08-10 2017-02-16 住友化学株式会社 偏光板、画像表示装置、及び偏光板の製造方法
JP6805966B2 (ja) * 2017-05-24 2020-12-23 Ａｇｃ株式会社 カバー部材、カバー部材の製造方法および表示装置

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JP2012047929A (ja) 2012-03-08
CN103097923B (zh) 2015-03-11
TW201224091A (en) 2012-06-16
JP5750848B2 (ja) 2015-07-22
CN103097923A (zh) 2013-05-08
TWI551660B (zh) 2016-10-01
KR20140006774A (ko) 2014-01-16

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