WO2020111176A1 - 防眩性フィルム、防眩性フィルムの製造方法、光学部材および画像表示装置 - Google Patents

防眩性フィルム、防眩性フィルムの製造方法、光学部材および画像表示装置 Download PDF

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Publication number
WO2020111176A1
WO2020111176A1 PCT/JP2019/046549 JP2019046549W WO2020111176A1 WO 2020111176 A1 WO2020111176 A1 WO 2020111176A1 JP 2019046549 W JP2019046549 W JP 2019046549W WO 2020111176 A1 WO2020111176 A1 WO 2020111176A1
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Prior art keywords
antiglare
film
layer
antiglare layer
fine particles
Prior art date
Application number
PCT/JP2019/046549
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English (en)
French (fr)
Japanese (ja)
Inventor
慎哉 平岡
尚樹 橋本
Original Assignee
日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020217017908A priority Critical patent/KR20210095643A/ko
Priority to SG11202105534WA priority patent/SG11202105534WA/en
Priority to CN201980078387.3A priority patent/CN113167940B/zh
Publication of WO2020111176A1 publication Critical patent/WO2020111176A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
    • 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
    • G02B1/11—Anti-reflection 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • 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
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • Patent Documents 1 and 2 There are many documents that describe the antiglare film, for example, Patent Documents 1 and 2.
  • the antiglare film needs to be suppressed from being reflected by external light.
  • FIG. 1 is a cross-sectional view showing an example of the antiglare film of the present invention.
  • FIG. 2 is a cross-sectional view showing another example of the antiglare film of the present invention.
  • FIG. 3 is a cross-sectional view showing an example of the antiglare film.
  • unevenness is formed on the surface of the antiglare layer (B) opposite to the light transmissive substrate (A), and the weight average particle diameter of the fine particles is
  • the thickness may be greater than the maximum thickness of the antiglare layer (B) minus the maximum height of the convex portions of the irregularities.
  • another layer may be further laminated on the surface of the antiglare layer (B) opposite to the light transmissive substrate (A).
  • the antiglare layer (B) forming step may further include a curing step of curing the coating film.
  • the antiglare film 10 has an antiglare layer (B) 12 laminated on one surface of a light transmissive substrate (A) 11.
  • the antiglare layer (B) 12 contains fine particles 12b and a thixotropy imparting agent 12c in the resin layer 12a. Irregularities are formed on the outermost surface of the antiglare film (B) 12 side of the antiglare film (the surface of the antiglare layer (B) 12 opposite to the light transmissive substrate (A) 11). There is.
  • the maximum height Ry of the convex portion of the unevenness is 1 ⁇ m or more.
  • the average inclination angle ⁇ a (not shown) of the irregularities is 0.7° or more.
  • the particle diameter D of the fine particles 12b is larger than the film thickness t obtained by subtracting Ry from the maximum thickness d of the antiglare layer (B).
  • FIG. 1 is an example, and the present invention is not limited to this.
  • the antiglare film of the present invention may or may not include the fine particles and the thixotropy imparting agent, respectively.
  • the particle diameter D of the fine particles 12b is larger than the film thickness t of the antiglare layer (B), but the present invention is not limited to this.
  • the antiglare film of the present invention can be used, for example, in a polarizing plate as a protective film, and in this case, the transparent plastic film substrate includes triacetyl cellulose (TAC), polycarbonate, acrylic polymer, A film formed of a polyolefin or the like having a cyclic or norbornene structure is preferable. Further, in the present invention, as will be described later, the transparent plastic film substrate may be the polarizer itself. With such a structure, a protective layer made of TAC or the like is not required and the structure of the polarizing plate can be simplified, so that the number of manufacturing steps of the polarizing plate or the image display device can be reduced and the production efficiency can be improved.
  • TAC triacetyl cellulose
  • acrylic polymer acrylic polymer
  • a film formed of a polyolefin or the like having a cyclic or norbornene structure is preferable.
  • the transparent plastic film substrate may be the polarizer itself. With such a structure, a protective layer made
  • the resin contained in the light transmissive substrate (A) may contain an acrylic resin.
  • the light transmissive substrate (A) may be an acrylic film.
  • the antiglare film of the present invention has irregularities formed on the outermost surface on the antiglare layer (B) side, and the maximum height Ry of the irregularities is 1 ⁇ m or more.
  • the maximum height Ry may be, for example, 1.5 ⁇ m or more, and may be, for example, 9 ⁇ m or less, 8 ⁇ m or less, 7 ⁇ m or less, or 6 ⁇ m or less.
  • the maximum height Ry may be, for example, 1 to 9 ⁇ m, 1 to 8 ⁇ m, 1 to 7 ⁇ m, or 1.5 to 6 ⁇ m.
  • Ry is preferably large from the viewpoint of suppressing glare, it is preferably not too large from the viewpoint of haze value described later.
  • the maximum height Ry is a value based on JIS B 0601 (1994 version).
  • the measuring method of Ry is not particularly limited, but it can be measured, for example, by the measuring method described in Examples described later.
  • the average inclination angle ⁇ a is 0.7 or more in the uneven shape of the outermost surface on the antiglare layer (B) side.
  • the average inclination angle ⁇ a may be, for example, 0.7° or more, 0.8° or more, 0.9° or more, or 1.0° or more, and 8° or less, 7° or less, 6° or less. , Or 5° or less.
  • the average inclination angle ⁇ a is, for example, 0.7 to 8°, 0.7 to 7°, 0.7 to 6°, 0.7 to 5°, 0.8 to 8°, 0.8 to 7°.
  • the antiglare film of the present invention may have a haze value of, for example, 4% or more, 6% or more, 10% or more, or 15% or more, for example, 50% or less, 40% or less, It may be 35% or less, or less than 30%.
  • the haze value may be, for example, 4 to 50%, 6 to 40%, 10 to 40%, further 15 to 40%, or 15 to 35%.
  • the haze value is the haze value (cloudiness) of the entire antiglare film according to JIS K 7136 (2000 version). Generally, in the antiglare film, when the haze value is large, it is easy to suppress glare.
  • the resin contained in the antiglare layer (B) may be a copolymer of a curable urethane acrylate resin and a polyfunctional acrylate.
  • the antiglare layer (B) is formed using an antiglare layer forming material containing a resin and a filler, and the antiglare layer (B) contains the filler.
  • the antiglare layer (B) may have an aggregating portion that forms a convex portion by aggregating.
  • a plurality of the fillers may be present in a state gathered in one direction in the surface direction of the antiglare layer (B).
  • the antiglare film of the present invention may be arranged such that one direction in which a plurality of the fillers are gathered and a long side direction of the black matrix pattern match. ..
  • the thixotropy-imparting agent may be, for example, at least one selected from the group consisting of organic clay, oxidized polyolefin, and modified urea. Further, the thixotropy imparting agent may be, for example, a thickener.
  • the fine particles are contained in the range of, for example, 0.2 to 12 parts by weight or 0.5 to 12 parts by weight with respect to 100 parts by weight of the resin of the antiglare layer (B). It may be.
  • Examples of the reactive diluent also include butanediol glycerin ether diacrylate, acrylate of isocyanuric acid, and methacrylate of isocyanuric acid. These may be used alone or in combination of two or more.
  • the particle diameter (D) (weight average particle diameter) of the fine particles is not particularly limited, but is, for example, in the range of 2 to 10 ⁇ m. By setting the weight average particle diameter of the fine particles within the above range, for example, an antiglare film having more excellent antiglare properties and suppressed glare can be obtained. From the viewpoint of suppressing reflection from an oblique direction, it is preferable that the weight average particle diameter of the fine particles is not too small. From the viewpoint of suppressing reflection from the front direction, it is preferable that the weight average particle diameter of the fine particles is not too large.
  • the ratio D/d′ between the thickness (d′) of the antiglare layer (B) and the weight average particle diameter (D) of the fine particles is, for example, 1 or less, less than 1, less than 0.98, 0.96 or less. , 0.93 or less, or 0.90 or less, and 0.5 or more, 0.6 or more, 0.7 or more, or 0.8 or more.
  • the antiglare layer (B) has an aggregated portion that forms a convex portion on the surface of the antiglare layer (B) due to aggregation of the filler.
  • a plurality of the fillers may be present in a state gathered in one direction in the plane direction of the antiglare layer (B). Thereby, for example, the reflection of a fluorescent lamp can be prevented.
  • the antiglare film of the present invention is not limited to this.
  • the resin contained in the intermediate layer is not particularly limited, and for example, the resin contained in the light transmissive substrate (A) and the resin contained in the antiglare layer (B) are simply mixed (compatible). It may be a thing. Further, the resin contained in the intermediate layer is, for example, at least one of the resin contained in the light transmissive substrate (A) and the resin contained in the antiglare layer (B) is heating, light irradiation, or the like. It may be chemically changed by.
  • the Ti value is 1.3 or more, problems such as appearance defects and deterioration of antiglare properties and white blur characteristics are less likely to occur. Further, if the Ti value is 3.5 or less, problems such as the particles being in a dispersed state without aggregating are unlikely to occur.
  • a good solvent for the acrylic film (acrylic resin) can be preferably used.
  • the solvent may be, for example, a solvent containing a hydrocarbon solvent and a ketone solvent as described above.
  • the hydrocarbon solvent may be, for example, an aromatic hydrocarbon.
  • the aromatic hydrocarbon may be, for example, at least one selected from the group consisting of toluene, o-xylene, m-xylene, p-xylene, ethylbenzene, and benzene.
  • the thixotropy of the material for forming the antiglare layer (coating liquid) can be well exhibited when the thixotropy-imparting agent is contained.
  • toluene and xylene can be preferably used alone or in combination.
  • methyl ethyl ketone, ethyl acetate, and propylene glycol monomethylmatel are preferably used alone. They can be used or used together.
  • a modified urea is used, butyl acetate and methyl isobutyl ketone are preferably used alone or in combination.
  • a laminate of the light transmissive substrate (A) and the antiglare layer (B) can be manufactured.
  • This laminate may be used as the antiglare film of the present invention as it is, or for example, the other layer may be formed on the antiglare layer (B) to form the antiglare film of the present invention.
  • the method for forming the other layer is not particularly limited, and is, for example, the same as or similar to the method for forming a general low refractive index layer, antireflection layer, high refractive index layer, hard coat layer, pressure-sensitive adhesive layer, or the like. Can be done at.
  • a constant weight feeder (manufactured by Kubota Corporation) was used to supply the raw material resin to the first extruder raw material supply port.
  • the degree of pressure reduction of each vent in the first extruder and the second extruder was ⁇ 0.095 MPa.
  • a pipe having a diameter of 38 mm and a length of 2 m was used for connecting the first extruder and the second extruder.
  • a constant flow pressure valve was used for the internal pressure control mechanism for connecting the resin discharge port of the first extruder and the raw material supply port of the second extruder.
  • a resin pressure gauge was provided at each of the outlet of the first extruder, the central portion of the connecting part between the first extruder and the second extruder, and the outlet of the second extruder. This resin pressure gauge can be used for adjusting the pressure in the component connecting the resin discharge port of the first extruder and the second extruder raw material supply port, or for determining the extrusion fluctuation.
  • the above-mentioned imidized polymethylmethacrylate resin was manufactured as follows. First, the raw material resin polymethylmethacrylate resin (Mw: 105,000) and the imidizing agent monomethylamine were charged into the first extruder to produce the imide resin intermediate 1. At this time, the extruder maximum temperature was 280° C., the screw rotation speed was 55 rpm, the raw material resin supply rate was 150 kg/hour, and the addition amount of monomethylamine was 2.0 parts with respect to 100 parts of the raw material resin. In addition, the pressure of the first extruder monomethylamine press-fitting section was adjusted to 8 MPa by the constant flow pressure valve installed immediately before the second extruder raw material supply port.
  • Pentaerythritol triacrylate (PETA) (Osaka Organic Chemical Industry Co., Ltd., trade name: Biscoat #300, concentration 80%) 60 parts, 15-functional urethane acrylic oligomer (Shin Nakamura Chemical Co., Ltd., trade name: NK Oligo UA-53H, Weight average molecular weight: 2300, concentration 100%) 40 parts, 4-hydroxybutyl acrylate (Osaka Organic Chemical Co., Ltd., trade name: 4-HBA, concentration 100%) 20 parts, leveling agent (DIC, trade name: 1 part of GRANDIC PC-4100), 5 parts of a photopolymerization initiator (manufactured by BASF Japan Ltd., trade name: Irgacure 907), fine particles of crosslinked acrylic styrene copolymer resin (manufactured by Sekisui Plastics Co., Ltd., trade name: SSX1055QXE, weight average particle) Diameter: 5.5 ⁇ m
  • Coating liquid 3 Coating liquid 1 was coated in the same manner as coating liquid 1 except that the fine particles of crosslinked acrylic styrene copolymer resin of coating liquid 1 were changed to 20 parts of fine particles of crosslinked acrylic styrene copolymer resin having a weight average particle diameter of 8.0 ⁇ m.
  • Working solution 3 composition for forming an antiglare layer
  • Example 5 An antiglare film was obtained in the same manner as in Example 1 except that the coating liquid 1 was changed to the coating liquid 2 and the maximum height Ry value of the antiglare layer (B) was set to 2.4 ⁇ m.
  • Example 7 An antiglare film was obtained in the same manner as in Example 5 except that the maximum height Ry value of the antiglare layer (B) was changed to 1.1 ⁇ m by changing the thickness of the coating film.
  • Example 10 An antiglare film was obtained in the same manner as in Example 1 except that the coating liquid 1 was changed to the coating liquid 3 and the maximum height Ry value of the antiglare layer (B) was set to 2.6 ⁇ m.
  • Example 11 An antiglare film was obtained in the same manner as in Example 5 except that the maximum height Ry value of the antiglare layer (B) was changed to 1.8 ⁇ m by changing the thickness of the coating film.
  • Example 12 An antiglare film was obtained in the same manner as in Example 5 except that the maximum height Ry value of the antiglare layer (B) was changed to 1.2 ⁇ by changing the thickness of the coating film.
  • Example 4 An antiglare film was obtained in the same manner as in Example 8 except that Smecton SAN was not added (addition amount 0 part) and the addition amount of fine particles was changed to 0.3 part.
  • the average inclination angle ⁇ a of the irregularities of the antiglare layer in this antiglare film was less than 0.7 degrees.
  • the present invention it is possible to provide an antiglare film, an optical member and an image display device in which glare is suppressed.
  • the antiglare film of the present invention for example, strong external light can be scattered and reflection can be suppressed, so that glare can be suppressed even outdoors. Therefore, the present invention can be suitably used for an image display device such as an outdoor public information display.
  • the present invention is not limited to this application and can be used for a wide range of applications.
  • Anti-glare film 11 Light-transmissive substrate (A) 12 Antiglare layer (B) 12a Resin layer 12b Particle 12c Thixotropic agent 13 Other layer Ry Maximum height of convex portion of irregularities on the outermost surface d Maximum thickness D other than the light transmissive substrate (A) D Particle diameter Ry′ Antiglare layer (B ) Maximum height of convex portion of unevenness d′ Maximum thickness of antiglare layer (B) t Thickness of antiglare layer (B) (d′ ⁇ Ry′)

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
PCT/JP2019/046549 2018-11-29 2019-11-28 防眩性フィルム、防眩性フィルムの製造方法、光学部材および画像表示装置 WO2020111176A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020217017908A KR20210095643A (ko) 2018-11-29 2019-11-28 방현성 필름, 방현성 필름의 제조 방법, 광학 부재 및 화상 표시 장치
SG11202105534WA SG11202105534WA (en) 2018-11-29 2019-11-28 Anti-glare film, method for producing anti-glare film, optical member, and image display device
CN201980078387.3A CN113167940B (zh) 2018-11-29 2019-11-28 防眩性薄膜、防眩性薄膜的制造方法、光学构件和图像显示装置

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JP2018-223536 2018-11-29
JP2018223536A JP2020086273A (ja) 2018-11-29 2018-11-29 防眩性フィルム、防眩性フィルムの製造方法、光学部材および画像表示装置

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WO (1) WO2020111176A1 (zh)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US20230086813A1 (en) * 2021-09-17 2023-03-23 Benq Materials Corporation High-haze anti-glare film and high-haze anti-glare anti-reflection film

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JP2021124616A (ja) * 2020-02-05 2021-08-30 日東電工株式会社 防眩性ハードコートフィルム、防眩性ハードコートフィルムの製造方法、光学部材および画像表示装置

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