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WO2018025698A1 - Film stratifié - Google Patents

Film stratifié Download PDF

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Publication number
WO2018025698A1
WO2018025698A1 PCT/JP2017/026782 JP2017026782W WO2018025698A1 WO 2018025698 A1 WO2018025698 A1 WO 2018025698A1 JP 2017026782 W JP2017026782 W JP 2017026782W WO 2018025698 A1 WO2018025698 A1 WO 2018025698A1
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WIPO (PCT)
Prior art keywords
film
resin
layer
examples
polarizer layer
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PCT/JP2017/026782
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English (en)
Japanese (ja)
Inventor
将司 藤長
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Publication of WO2018025698A1 publication Critical patent/WO2018025698A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • 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
    • 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

Definitions

  • the present invention relates to a laminated film.
  • a polarizing plate has been widely used as a polarized light supplying element and a polarized light detecting element in a display device such as a liquid crystal display device.
  • a polarizing plate having a configuration in which a protective film is bonded to one side or both sides of a polarizing film (polarizer layer) using an adhesive or the like is known.
  • a film made of a polyvinyl alcohol-based resin in which a dichroic dye such as iodine is oriented is known.
  • Iodine in the polarizing film exists as an iodine complex, and the iodine complex itself is oriented depending on the orientation of the polyvinyl alcohol resin. It is known that this iodine complex absorbs light in the visible region, so that the polarizing film exhibits polarization characteristics (polarization degree).
  • the stretched film constituting the retardation film may be required to have a slow axis in a direction oblique to the longitudinal direction of the polarizing film. In such a display device, it is necessary to dispose the retardation film so that the slow axis of the retardation film and the absorption axis of the polarizing film are at a desired angle.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a laminated film that can maintain a high degree of polarization even in a humid heat environment.
  • the inventors of the present invention have made the stretched film expand and contract in a direction oblique to the longitudinal direction of the film in a wet and heat environment, thereby polarizing the polarizing plate. It was estimated that the axis collapsed, resulting in a decrease in the degree of polarization.
  • the glass transition temperature of the adhesive layer interposed between the polarizing film and the optical layer is expected to be able to suppress expansion and contraction in the oblique direction of the stretched film when the glass transition temperature is 60 ° C. or higher. It came to be completed.
  • One embodiment of the present invention is a material for forming a polarizer film in which a dichroic dye is oriented in a polyvinyl alcohol resin, and a resin film having a slow axis in a direction oblique to the absorption axis of the polarizer layer And an adhesive layer that adheres the polarizer layer and the stretched film, and the adhesive layer provides a laminated film having a glass transition temperature of 60 ° C. or higher.
  • the polarizer layer and the stretched film may both be long.
  • a laminated film capable of maintaining a high degree of polarization even in a humid heat environment is provided.
  • FIG. 1 is a schematic cross-sectional view showing an example of the layer configuration of the laminated film of the present embodiment.
  • the laminated film 1 of the present embodiment includes a polarizer layer 11, a stretched film 21, and an adhesive layer 31 that bonds the polarizer layer 11 and the stretched film 21.
  • a protective film may be further laminated on the side of the polarizer layer 11 opposite to the stretched film 21.
  • the laminated film of the present embodiment may be long or may be a single body obtained by cutting the long laminated film into a predetermined length.
  • the long laminated film includes a long polarizer layer and a long stretched film. The long polarizer layer and the long stretched film will be described later.
  • a polarizer layer refers to an optical film having the property of absorbing linearly polarized light having a vibration plane parallel to the optical axis and transmitting linearly polarized light having a vibration plane perpendicular to the optical axis.
  • the polarizer layer 11 of this embodiment is a film in which a dichroic dye is oriented in a polyvinyl alcohol-based resin (hereinafter sometimes referred to as “PVA-based resin”).
  • the thickness of the polarizer layer 11 is preferably 30 ⁇ m or less, more preferably 25 ⁇ m or less, further preferably 15 ⁇ m or less, particularly preferably 10 ⁇ m or less, and particularly preferably 7 ⁇ m or less. preferable.
  • the polarizer layer 11 When the polarizer layer 11 is a film in which a dichroic dye is oriented in a PVA-based resin, the polarizer layer 11 may be obtained by stretching a film original containing the PVA-based resin. When the thickness of the polarizer layer 11 is 7 ⁇ m or less, the polarizer layer 11 may be obtained by stretching a coating film containing a PVA-based resin formed on the substrate together with the substrate, and then peeling the substrate.
  • Examples of the substrate that may be used in the present embodiment include a polypropylene film, a polyethylene terephthalate film, a polycarbonate film, a triacetyl cellulose film, a norbornene film, a polyester film, and a polystyrene film.
  • Examples of the PVA resin used in the present embodiment include a saponified polyvinyl acetate resin.
  • the polyvinyl acetate resin include polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith.
  • Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and acrylamides having ammonium groups.
  • the saponification degree of the PVA resin is preferably 80 mol% or more, more preferably 90 mol% or more and 99.5 mol% or less, and further preferably 94 mol% or more and 99 mol% or less. .
  • the degree of saponification is 80 mol% or more, the moisture and heat resistance of the resulting laminated film 1 is improved.
  • polarized-light performance as saponification degree is 99.5 mol% or less is obtained.
  • the PVA resin may be a modified polyvinyl alcohol partially modified.
  • olefin modification with ethylene, propylene, etc . unsaturated carboxylic acid modification with acrylic acid, methacrylic acid, crotonic acid, etc .
  • one modified with an alkyl ester of unsaturated carboxylic acid, acrylamide or the like may be used.
  • the rate of modification of the PVA resin is preferably less than 30 mol%, more preferably less than 10%.
  • the dichroic dye can be sufficiently adsorbed, and a polarizer having sufficient polarization performance can be obtained.
  • the average degree of polymerization of the PVA-based resin is preferably 100 or more and 10,000 or less, more preferably 1500 or more and 8000 or less, and further preferably 2000 or more and 5000 or less.
  • a polarizer having sufficient polarization performance can be obtained.
  • the average degree of polymerization is 10,000 or less, the solubility in a solvent becomes good, and the formation of a film containing a PVA resin is easy.
  • PVA-based resins can be easily obtained, and preferable examples of commercially available products are trade names, “PVA124” and “PVA117” (both saponification degrees) manufactured by Kuraray Co., Ltd. : 98 to 99 mol%), “PVA624" (degree of saponification: 95 to 96 mol%), “PVA617” (degree of saponification: 94.5 to 95.5 mol%); manufactured by Nippon Synthetic Chemical Industry Co., Ltd.
  • JF-20 both saponification degrees: 98-99 %), “JM-26” (degree of saponification: 95.5 to 97.5 mol%), “JM-33” (degree of saponification: 93.5 to 95.5 mol%), “JP-45” (Saponification degree: 86.5 to 89.5 mol%).
  • dichroic dye used in the present embodiment examples include iodine or a dichroic organic dye.
  • Dichroic organic dyes include Red BR, Red LR, Red R, Pink LB, Rubin BL, Bordeaux GS, Sky Blue LG, Lemon Yellow, Blue BR, Blue 2R, Navy RY, Green LG, Violet LB, Violet B , Black H, Black B, Black GSP, Yellow 3G, Yellow R, Orange LR, Orange 3R, Scarlet GL, Scarlet KGL, Congo Red, Brilliant Violet BK, Spura Blue G, Spura Blue GL, Spura Orange GL, Direct Sky Blue , Direct First Orange S, and First Black.
  • dichroic dye Only one type of dichroic dye may be used alone, or two or more types may be used in combination.
  • the stretched film 21 of the present embodiment uses a resin film having a slow axis in a direction oblique to the absorption axis of the polarizer layer 11 as a forming material.
  • a resin film can be manufactured through a stretching process, and the resin film is left with a tensile stress in a direction oblique to the absorption axis of the polarizer layer 11.
  • the stretched film 21 has a slow axis in a direction oblique to the absorption axis of the polarizer layer 11.
  • the angle of the slow axis is 45 ⁇ 10 ° or 135 with respect to the absorption axis of the polarizer layer 11. It is preferably ⁇ 10 °.
  • the difference between the light phase in the fast axis direction and the light phase in the slow axis direction is ⁇ / 2.
  • the phase difference between the fast axis and the slow axis is ⁇ / 2
  • the laminated film 1 of the present embodiment is applied to a display device, the light that has passed through the laminated film 1 can be made into circularly polarized light. . Therefore, even when viewed through polarized sunglasses, a configuration with excellent visibility can be obtained.
  • the stretched film 21 of the present embodiment is preferably a retardation layer having retardation characteristics and wavelength dispersion characteristics that satisfy the following formulas (1) to (4).
  • the stretched film 21 satisfies the formulas (1) to (4)
  • the laminated film 1 of this embodiment is incorporated into a display device, the screen is viewed from various directions (azimuth and polar angles) through polarized sunglasses. It is possible to effectively suppress the color change when viewing the screen. Thereby, the visibility of the image display device can be improved.
  • R e (590), R e (450), R e (550), and R e (630) represent in-plane retardation values at measurement wavelengths of 590 nm, 450 nm, 550 nm, and 630 nm, respectively, and R th ( 590) represents a thickness direction retardation value at a measurement wavelength of 590 nm.
  • These in-plane retardation value and thickness direction retardation value are values measured in an environment of a temperature of 23 ° C. and a relative humidity of 55%.
  • Plane retardation value R e, and the thickness direction retardation value R th refraction of the refractive index in the in-plane slow axis direction n x, plane fast axis direction (perpendicular to the plane slow axis direction)
  • the rate is ny
  • the refractive index in the thickness direction is nz
  • the thickness of the optical film is d, it is defined by the following formulas (S1) and (S2).
  • R e (590) in the formula (1) is preferably 105 to 170 nm.
  • R th (590) / R e (590) in the formula (2) is preferably 0.6 to 0.75.
  • R e (450) / R e (550) is preferably 0.86 to 0.98.
  • R e (630) / R e (550) is preferably 1.01 to 1.06.
  • the stretched film 21 can be produced by stretching a film containing a resin described later.
  • Examples of the stretching treatment include uniaxial stretching and biaxial stretching.
  • the stretching direction examples include a machine flow direction (MD) of an unstretched film, a direction perpendicular to the machine flow direction (TD), and a direction oblique to the machine flow direction (MD).
  • MD machine flow direction
  • TD machine flow direction
  • MD machine flow direction
  • MD direction perpendicular to the machine flow direction
  • MD direction oblique to the machine flow direction
  • the unstretched film refers to a film that is not stretched.
  • uniaxial stretching an unstretched film is stretched in any one of these directions.
  • the biaxial stretching may be simultaneous biaxial stretching that simultaneously stretches in two stretching directions, or may be sequential biaxial stretching that stretches in another direction after stretching in a predetermined direction.
  • the stretching process for example, two or more pairs of nip rolls with increased peripheral speed on the outlet side are used to stretch in the longitudinal direction (machine flow direction: MD), or the both ends of the unstretched film are gripped with a chuck and machine flow is performed. It can be performed by spreading in a direction (TD) orthogonal to the direction.
  • the retardation value and the wavelength dispersion can be controlled within the ranges of the above formulas (1) to (4) by adjusting the thickness of the film or adjusting the draw ratio.
  • the chromatic dispersion value can be controlled within the range of the above formulas (3) to (4) by adding a chromatic dispersion adjusting agent to the resin.
  • a long polarizing film (polarizer layer) has an absorption axis in the long side direction.
  • the long stretched film and the long polarizer layer can be bonded with a roll-to-roll, and the angle formed by the absorption axis and the slow axis of the stretched film is within the above range. It is preferable that the stretched film 21 is manufactured by being obliquely stretched by biaxial stretching.
  • Examples of the resin forming the resin film include cellulose acetate resin, cycloolefin resin, polyolefin resin, acrylic resin, polyimide resin, polycarbonate resin, and polyester resin.
  • the cellulose acetate resin is composed of a cellulose portion or a complete acetate ester.
  • Examples of the cellulose acetate resin include triacetyl cellulose and diacetyl cellulose.
  • a resin film made of a cellulose acetate resin can be easily obtained as a commercial product.
  • all of them are trade names of “Fujitac (registered)” sold by FUJIFILM Corporation. Trademarks) TD80 ",” Fujitac (registered trademark) TD80UF “and” Fujitac (registered trademark) TD80UZ ",” KC8UX2M “and” KC8UY "sold by Konica Minolta Opto Corporation.
  • the cycloolefin resin forming the resin film is, for example, a thermoplastic amorphous resin having a monomer unit composed of a cyclic olefin (cycloolefin) such as norbornene or a polycyclic norbornene monomer (non-crystalline polyolefin). Also called resin.)
  • the cycloolefin-based resin may be a hydrogenated product of the above-mentioned cycloolefin ring-opening polymer or a hydrogenated product of a ring-opening copolymer using two or more kinds of cycloolefins. It may be an addition copolymer with an olefin and / or an aromatic compound having a vinyl group. In addition, a polar group may be introduced.
  • a resin film is formed using a copolymer of a cycloolefin and a chain olefin and / or an aromatic compound having a vinyl group
  • chain olefin examples include ethylene and propylene.
  • aromatic compound having a vinyl group examples include styrene, ⁇ -methylstyrene, and nuclear alkyl-substituted styrene.
  • the unit of the monomer composed of cycloolefin may be 50 mol% or less, preferably 15 to 50 mol%.
  • the monomer unit composed of the cycloolefin can be used in a relatively small amount as described above.
  • the unit of monomer composed of a chain olefin is preferably 5 to 80 mol%.
  • the unit of the monomer composed of an aromatic compound having a vinyl group is preferably 5 to 80 mol%.
  • Cycloolefin-based resins can be easily obtained from commercial products, and preferable examples of commercially available products are all trade names, manufactured by TOPAS ADVANCED POLYMERS GmbH, sold in Japan by Polyplastics Co., Ltd. "TOPAS (registered trademark)”, “Arton (registered trademark)” sold by JSR Corporation, “ZEONOR (registered trademark)” and “ZEONEX” sold by ZEON Corporation ) (Registered trademark) ”,“ Apel (registered trademark) ”sold by Mitsui Chemicals, Inc., and the like.
  • the thickness of the retardation layer is preferably 10 ⁇ m or more and 50 ⁇ m or less.
  • the stretched film 21 of the present embodiment may contain a plasticizer for the purpose of imparting flexibility to the resin film and facilitating stretching in addition to the resin forming the resin film.
  • a plasticizer for the purpose of imparting flexibility to the resin film and facilitating stretching in addition to the resin forming the resin film.
  • the plasticizer include polyhydric alcohols such as ethylene glycol, glycerin, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and trimethylolpropane.
  • the plasticizer may be used alone or in combination of two or more.
  • ethylene glycol and glycerin are preferably used.
  • the adhesive layer 31 of this embodiment has a glass transition temperature of 60 ° C. or higher.
  • the glass transition temperature is 60 ° C. or higher, the hardness of the adhesive layer 31 can be sufficiently increased. Thereby, the expansion-contraction to the direction which crosses the stretched film 21 diagonally can be suppressed in a humid heat environment (for example, the environment of 60 degreeC of room temperature, and 95% of humidity).
  • the upper limit is not particularly limited, but may be about 400 ° C.
  • the glass transition temperature of the adhesive layer 31 is a value measured as follows.
  • an active energy ray-curable adhesive composition (described later) two sheets of a stretched cycloolefin-based resin film (trade name “ZEONOR (registered trademark)” manufactured by Nippon Zeon Co., Ltd.) having a thickness of 50 ⁇ m are prepared. Then, using a bar coater on one film surface, each prepared curable resin composition is applied so that the film thickness after curing is 2 ⁇ m, and another film is overlaid on the coated surface.
  • an ultraviolet-ray is irradiated so that an integrated light quantity may be 250 mJ / cm ⁇ 2 > from one surface, and an adhesive composition is hardened.
  • a container containing the above-described measurement sample is set in a differential scanning calorimeter (DSC) “EXSTAR-6000 DSC 6220” sold by SII Nano Technology Co., Ltd. Then, while flowing in nitrogen gas, the temperature is lowered from 20 ° C. to ⁇ 60 ° C., held for 1 minute after reaching ⁇ 60 ° C., and then heated from ⁇ 60 ° C. to 200 ° C. at a rate of 10 ° C./min. When the temperature reaches 200 ° C., the temperature is immediately lowered to 20 ° C. Then, from the DSC curve when the temperature is raised from ⁇ 60 ° C. to 200 ° C., the midpoint glass transition temperature specified in JIS K 7121-1987 “Method for measuring plastic transition temperature” is determined. This was made into the glass transition temperature of the adhesive bond layer 31 (hardened
  • DSC differential scanning calorimeter
  • aqueous adhesive composition (described later), one triacetyl cellulose film [trade name “KC4UY” manufactured by Konica Minolta Opto Co., Ltd.] was prepared. A water-based adhesive composition was applied to one side and dried at 80 ° C. for 5 minutes. At this time, coating and drying were repeated so that the film thickness after drying was 2 ⁇ m. Then, the sample for a measurement was produced with the method similar to the above with respect to the hardened
  • the thickness of the adhesive layer 31 is preferably 0.01 ⁇ m or more and 5 ⁇ m or less, more preferably 0.01 ⁇ m or more and 2 ⁇ m or less, and further preferably 0.01 ⁇ m or more and 1 ⁇ m or less. Sufficient adhesiveness can be acquired as the thickness of the adhesive bond layer 31 is 0.01 micrometer or more. Moreover, when the thickness of the adhesive layer 31 is 5 ⁇ m or less, the laminated film 1 is unlikely to have a poor appearance.
  • the material for forming the adhesive layer 31 is not particularly limited as long as the glass transition temperature is 60 ° C. or higher, and a cured product of the curable resin composition can be used.
  • the curable resin composition include a water-based adhesive composition and an active energy ray-curable adhesive composition.
  • the “active energy ray-curable adhesive composition” refers to an adhesive composition that is cured by irradiation with active energy rays (for example, ultraviolet rays, visible light, electron beams, X-rays, etc.).
  • the aqueous adhesive composition examples include an aqueous polyvinyl alcohol resin solution and an aqueous two-component urethane emulsion adhesive composition, and an aqueous polyvinyl alcohol resin solution is preferable.
  • the polyvinyl alcohol resin used as the adhesive composition includes a vinyl alcohol homopolymer obtained by saponifying polyvinyl acetate, which is a homopolymer of vinyl acetate, and vinyl acetate.
  • vinyl alcohol copolymers obtained by saponifying a copolymer with other monomers copolymerizable therewith, and modified polyvinyl alcohol polymers obtained by partially modifying the hydroxyl groups thereof is there.
  • the modified polyvinyl alcohol polymer examples include carboxy group-modified polyvinyl alcohol, acetoacetyl group-modified polyvinyl alcohol, methylol group-modified polyvinyl alcohol, and amino group-modified polyvinyl alcohol.
  • the adhesive layer 31 preferably contains a cured product of an acetoacetyl group-modified polyvinyl alcohol resin as a forming material.
  • a polyhydric aldehyde, a water-soluble epoxy compound, a melamine compound, a zirconia compound, a zinc compound, or the like may be added as an additive.
  • An adhesive composition containing a polyvinyl alcohol resin as an adhesive component may contain a curable component such as a metal salt of glyoxylic acid, glyoxal, and a water-soluble epoxy resin and / or a crosslinking agent in order to improve adhesion.
  • a curable component such as a metal salt of glyoxylic acid, glyoxal, and a water-soluble epoxy resin and / or a crosslinking agent in order to improve adhesion.
  • the metal salt of glyoxylic acid is preferably an alkali metal salt or an alkaline earth metal salt, and examples thereof include sodium glyoxylate, potassium glyoxylate, magnesium glyoxylate, and calcium glyoxylate.
  • water-soluble epoxy resins examples include polyamide polyamine epoxy resins obtained by reacting polychloropolyamines such as diethylenetriamine and triethylenetetramine with polycarboxylic acid polyamines such as adipic acid and epichlorohydrin. Can be suitably used.
  • Examples of such a commercially available metal salt of glyoxylic acid include “SPM-01” (manufactured by Nippon Synthetic Chemical Co., Ltd.).
  • Commercially available products of such polyamide polyamine epoxy resins include “Smiles Resin 650” (manufactured by Sumika Chemtex Co., Ltd.), “Smiles Resin 675” (manufactured by Sumika Chemtex Co., Ltd.), “WS-525” (Nippon PMC Co., Ltd.) Company-made).
  • the addition amount of these curable components and / or crosslinking agents (the total amount when added together) is, for example, 1 to 100 parts by mass, preferably 1 to 50 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol resin. It is. Adhesiveness improves that the addition amount of the said sclerosing
  • the water-based adhesive composition contains a urethane resin
  • a polyester ionomer type urethane resin is a urethane resin having a polyester skeleton, and a small amount of an ionic component (hydrophilic component) is introduced into the skeleton.
  • an ionomer type urethane resin is suitable as a water-based adhesive composition because it is emulsified directly into water without using an emulsifier to form an emulsion.
  • Polyester-based ionomer urethane resins are known per se.
  • JP-A-7-97504 describes an example of a polymer dispersant for dispersing a phenol-based resin in an aqueous medium.
  • JP-A-2005-70140 and JP-A-2005-208456 a mixture of a polyester ionomer type urethane resin and a compound having a glycidyloxy group is used as an adhesive, and a polarizer made of a polyvinyl alcohol resin is cyclic. The form which bonds an olefin resin film is shown.
  • the content of the polyvinyl alcohol-based resin is preferably 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of water, and is 1 part by mass or more and 5 parts by mass or less. It is more preferable.
  • the active energy ray-curable compound contained in the active energy ray-curable adhesive composition is preferably a cationic polymerizable compound or a radical polymerizable compound, and includes a cationic polymerizable compound and a radical polymerizable compound. It is more preferable.
  • the cationic polymerizable compound and the radical polymerizable compound are included, an effect of increasing the hardness of the adhesive layer 31 can be expected, and furthermore, the adjustment of the viscosity and the curing rate of the active energy ray-curable adhesive composition is further facilitated. Will be able to do.
  • cationic polymerizable compound examples include an oxetane compound and an epoxy compound.
  • the content of the cationic polymerizable compound is preferably 10 parts by mass or more and 99 parts by mass or less, and 40 parts by mass or more and 99 parts by mass or less with respect to 100 parts by mass of the active energy ray-curable adhesive composition. It is more preferable.
  • oxetane compounds include 3-ethyl-3-hydroxymethyloxetane, 1,4-bis [(3-ethyl-3-oxetanyl) methoxymethyl] benzene, 3-ethyl-3- (phenoxymethyl) oxetane, di [( 3-ethyl-3-oxetanyl) methyl] ether, 3-ethyl-3- (2-ethylhexyloxymethyl) oxetane and the like.
  • 1,4-bis [(3-ethyl-3-oxetanyl) methoxymethyl] benzene and di [(3-ethyl-3-oxetanyl) methyl] ether are mentioned.
  • the content of the oxetane compound is preferably 1 part by mass or more and 50 parts by mass or less, and preferably 10 parts by mass or more and 40 parts by mass or less with respect to 100 parts by mass of the active energy ray-curable adhesive composition. More preferred.
  • the oxetane compound may be used alone or in combination of two or more.
  • the active energy ray-curable adhesive composition may contain an epoxy compound as necessary.
  • the epoxy compound is one of cationically polymerizable compounds like the oxetane compound, and can be cured by irradiation with active energy rays.
  • the active energy ray-curable adhesive composition contains an epoxy compound, the adhesion between the stretched film 21 and the polarizer layer 11 can be improved.
  • Examples of the epoxy compound include an aromatic epoxy compound, a glycidyl ether of a polyol having an alicyclic ring, an aliphatic epoxy compound, and an alicyclic epoxy compound.
  • Aromatic epoxy compounds include bisphenol type epoxy resins such as diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F and diglycidyl ether of bisphenol S; phenol novolac epoxy resins, cresol novolac epoxy resins and hydroxybenzaldehyde phenol novolacs Examples thereof include novolak-type epoxy resins such as epoxy resins; glycidyl ethers of tetrahydroxyphenylmethane, glycidyl ethers of tetrahydroxybenzophenone, and polyfunctional epoxy resins such as epoxidized polyvinylphenol.
  • glycidyl ether of a polyol having an alicyclic ring a nuclear hydrogenated polyhydroxy compound obtained by selectively hydrogenating an aromatic polyol under pressure in the presence of a catalyst under pressure is used as a glycidyl ether.
  • aromatic polyols include bisphenol type compounds such as bisphenol A, bisphenol F, and bisphenol S; novolac type resins such as phenol novolac resin, cresol novolac resin, hydroxybenzaldehyde phenol novolac resin; tetrahydroxydiphenylmethane, tetrahydroxybenzophenone, A polyfunctional compound such as polyvinylphenol is exemplified.
  • Glycidyl ether can be obtained by reacting an alicyclic polyol obtained by hydrogenating the aromatic ring of these aromatic polyols with epichlorohydrin.
  • glycidyl ethers of polyols having an alicyclic ring hydrogenated bisphenol A diglycidyl ether is preferable.
  • Examples of the “aliphatic epoxy compound” include an aliphatic polyhydric alcohol or a polyglycidyl ether of an alkylene oxide adduct thereof. Specifically, 1,4-butanediol diglycidyl ether; 1,6-hexanediol diglycidyl ether; glycerin triglycidyl ether; trimethylolpropane triglycidyl ether; polyethylene glycol diglycidyl ether; propylene glycol Diglycidyl ether of neopentyl glycol; by adding one or more alkylene oxides (ethylene oxide or propylene oxide) to aliphatic polyhydric alcohols such as ethylene glycol, propylene glycol or glycerin The polyglycidyl ether of the polyether polyol obtained is mentioned.
  • the monofunctional epoxy compound represented by following formula (I) is also mentioned as an aliphatic epoxy compound.
  • R 1 is an optionally branched alkyl group having 1 to 15 carbon atoms. The number of carbon atoms of the alkyl group is preferably 6 or more, more preferably 6 to 10. Of these, a branched alkyl group is preferred.
  • Examples of the monofunctional epoxy compound represented by the formula (I) include 2-ethylhexyl glycidyl ether.
  • Alicyclic epoxy compound refers to a compound having at least one structure in the molecule forming an oxirane ring together with the carbon atom of the alicyclic ring.
  • a structure in which an oxirane ring is formed together with a carbon atom of an alicyclic ring means a structure represented by the following formula (II).
  • N in the formula is an integer of 2 to 5.
  • a compound in which a group in a form in which one or a plurality of hydrogen atoms in (CH 2 ) n in formula (II) are removed is bonded to another chemical structure is an alicyclic epoxy compound.
  • One or more hydrogen atoms in (CH 2 ) n forming the alicyclic ring may be substituted with a linear alkyl group such as a methyl group or an ethyl group.
  • the content of the epoxy compound is preferably 1 part by mass or more and 90 parts by mass or less, and more preferably 20 parts by mass or more and 80 parts by mass or less with respect to 100 parts by mass of the active energy ray-curable adhesive composition. More preferred.
  • the epoxy compound may be used alone or in combination of two or more.
  • radical polymerizable compound in addition to the cationically polymerizable compound such as the oxetane compound or the epoxy compound, a radical polymerizable compound may be included.
  • radical polymerizable compound examples include a compound having at least one (meth) acryloyloxy group in the molecule (hereinafter sometimes referred to as “(meth) acrylic compound”), and at least one ( Examples thereof include compounds having a meth) acrylamide group (hereinafter sometimes referred to as “(meth) acrylamide compounds”).
  • the “(meth) acryloyloxy group” means a methacryloyloxy group or an acryloyloxy group
  • the (meth) acrylamide group means a methacryloylamide group or an acryloylamide group.
  • (Meth) acrylic compounds include (meth) acrylate monomers having at least one (meth) acryloyloxy group in the molecule and (meth) acrylates having at least two (meth) acryloyloxy groups in the molecule.
  • An oligomer etc. are mentioned. These may be used alone or in combination of two or more. When two or more types are used in combination, two or more (meth) acrylate monomers may be used, two or more (meth) acrylate oligomers may be used, and, of course, one or more (meth) acrylate monomers. One or more (meth) acrylate oligomers may be used in combination.
  • Examples of (meth) acrylamide compounds include N-substituted (meth) acrylamide compounds.
  • An N-substituted (meth) acrylamide compound is a (meth) acrylamide compound having a substituent at the N-position.
  • a typical example of the substituent is an alkyl group.
  • the N-position substituents may be bonded to each other to form a ring, and —CH 2 — constituting the ring may be substituted with an oxygen atom. Further, a substituent such as an alkyl group or an oxo group ( ⁇ O) may be bonded to the carbon atom constituting the ring.
  • N-substituted (meth) acrylamides can generally be prepared by reaction of (meth) acrylic acid or its chloride with a primary or secondary amine.
  • the content of the radical polymerizable compound is preferably 1 part by mass or more and 70 parts by mass or less, and preferably 10 parts by mass or more and 60 parts by mass or less with respect to 100 parts by mass of the active energy ray-curable adhesive composition. Is more preferable.
  • the radical polymerizable compound may be used alone or in combination of two or more.
  • the active energy ray-curable adhesive composition contains a cationic polymerizable compound such as the oxetane compound or the epoxy compound, it is preferable to further contain a cationic polymerization initiator.
  • the cationic polymerization initiator generates a cationic species or a Lewis acid by irradiation with active energy rays such as visible light, ultraviolet rays, X-rays, and electron beams, and initiates a polymerization reaction of the cationic polymerizable compound.
  • the cationic polymerization initiator include aromatic diazonium salts, onium salts such as aromatic iodonium salts and aromatic sulfonium salts, and iron-arene complexes.
  • aromatic diazonium salt examples include benzenediazonium hexafluoroantimonate, benzenediazonium hexafluorophosphate, and benzenediazonium hexafluoroborate.
  • aromatic iodonium salt examples include diphenyliodonium tetrakis (pentafluorophenyl) borate, diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, di (4-nonylphenyl) iodonium hexafluorophosphate, and the like.
  • aromatic sulfonium salt examples include triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrakis (pentafluorophenyl) borate, 4,4′-bis [diphenylsulfonio] diphenyl sulfide bishexa Fluorophosphate, 4,4'-bis [di ( ⁇ -hydroxyethoxy) phenylsulfonio] diphenyl sulfide bishexafluoroantimonate, 4,4'-bis [di ( ⁇ -hydroxyethoxy) phenylsulfonio] diphenyl sulfide bis Hexafluorophosphate, 7- [di (p-toluyl) sulfonio] -2-isopropylthioxanthone hexafluoroantimonate
  • iron-arene complexes examples include xylene-cyclopentadienyl iron (II) hexafluoroantimonate, cumene-cyclopentadienyl iron (II) hexafluorophosphate, xylene-cyclopentadienyl iron (II) tris ( (Trifluoromethylsulfonyl) methanide and the like.
  • cationic polymerization initiators can be easily obtained as commercial products.
  • the aromatic sulfonium salt is capable of absorbing light having a wavelength of 300 nm or more, having excellent curability, and obtaining a cured product having good mechanical strength and adhesion. preferable.
  • the cationic polymerization initiator may be used alone or in combination of two or more.
  • radical polymerization initiator When the active energy ray-curable adhesive composition contains the above-mentioned radical polymerizable compound, it is preferable to further contain a radical polymerization initiator. Any radical polymerization initiator may be used as long as it can initiate polymerization of a radical polymerizable compound such as a (meth) acrylic compound by irradiation with active energy rays, and a known one can be used.
  • radical polymerization initiators examples include acetophenone, 3-methylacetophenone, benzyldimethyl ketal, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-methyl-1- [4- ( Acetophenone initiators such as methylthio) phenyl-2-morpholinopropan-1-one and 2-hydroxy-2-methyl-1-phenylpropan-1-one; benzophenone, 4-chlorobenzophenone and 4,4′-diamino Benzophenone initiators such as benzophenone; benzoin ether initiators such as benzoin propyl ether and benzoin ethyl ether; thioxanthone initiators such as 4-isopropylthioxanthone; xanthone, fluorenone, camphorquinone Benzaldehyde, such as anthraquinone, and the like.
  • radical polymerization initiators can be easily obtained.
  • “Darocur (registered trademark)” manufactured by BASF are available.
  • Lucirin (registered trademark) TPO and the like.
  • the radical polymerization initiator may be used alone or in combination of two or more.
  • the active energy ray-curable adhesive composition is a photosensitizer, a solvent, a leveling agent, an antioxidant, a light stabilizer, an ultraviolet absorber, etc., as long as the effects of the present invention are not impaired, in addition to the above compounds. May be included.
  • photosensitizers examples include carbonyl compounds, organic sulfur compounds, persulfides, redox compounds, azo compounds, diazo compounds, halogen compounds, and photoreductive dyes.
  • Examples of the solvent that may be used in the present embodiment include aliphatic hydrocarbons such as n-hexane and cyclohexane; aromatic hydrocarbons such as toluene and xylene; methanol, ethanol, propanol, isopropanol, and n- Alcohols such as butanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; esters such as methyl acetate, ethyl acetate and butyl acetate; cellosolves such as methyl cellosolve, ethyl cellosolve and butyl cellosolve; Halogenated hydrocarbons such as methylene and chloroform.
  • aliphatic hydrocarbons such as n-hexane and cyclohexane
  • aromatic hydrocarbons such as toluene and xylene
  • leveling agent that may be used in the present embodiment, various compounds such as silicone, fluorine, polyether, acrylic acid copolymer, and titanate can be used.
  • antioxidants examples include primary antioxidants such as phenols and amines, and sulfur-based secondary antioxidants.
  • Examples of the light stabilizer that may be used in the present embodiment include hindered amine light stabilizers (HALS).
  • HALS hindered amine light stabilizers
  • Examples of ultraviolet absorbers that may be used in this embodiment include benzophenone-based, benzotriazole-based, and benzoate-based compounds.
  • Adjustment of the glass transition temperature of the adhesive layer 31 can be performed, for example, according to the following guidelines. That is, the glass transition temperature of the adhesive layer depends on the structure of the compound contained as a main component in the curable resin composition and the combination of the compounds. For example, when an adhesive layer is formed from a curable resin composition, when the composition contains the above-described alicyclic epoxy compound, the glass transition temperature tends to be high, and the above-described aliphatic epoxy compound is contained. The glass transition temperature tends to be low. It is possible to adjust the glass transition temperature of the adhesive layer also by the degree of crosslinking of the compound. For example, increasing the amount of bifunctional or higher curable compound increases the degree of cross-linking and increases the glass transition temperature of the adhesive layer. Increasing the amount of monofunctional curable compound decreases the degree of cross-linking and the glass transition temperature. It tends to be lower.
  • FIG. 2 is a schematic cross-sectional view showing a modification of the layer configuration of the laminated film of the present embodiment.
  • a protective film 23 can be further laminated on the side of the polarizer layer 11 opposite to the side on which the stretched film 21 is laminated.
  • a material for forming the protective film 23 the same resin as the material for forming the stretched film 21 can be used.
  • the material forming the stretched film 21 and the material forming the protective film 23 may be the same or different.
  • the protective film 23 can be laminated on the polarizer layer 11 via the adhesive layer 33.
  • the adhesive layer 33 include a water-based adhesive and an active energy ray-curable adhesive.
  • the active energy ray-curable adhesive include a cationic polymerization-type active energy ray-curable adhesive and a radical polymerization-type active energy.
  • a line curable adhesive is mentioned.
  • An adhesive layer may be provided instead of the adhesive layer 33.
  • Examples of the pressure-sensitive adhesive layer include a pressure-sensitive adhesive containing an acrylic resin.
  • An adhesive layer may be provided on the side of the polarizer layer 11 opposite to the side on which the stretched film 21 is laminated, or on the side of the protective film opposite to the side on which the polarizer layer 11 is laminated.
  • the laminated film 2 can be bonded to the liquid crystal cell of the display device.
  • the pressure-sensitive adhesive layer include a pressure-sensitive adhesive containing an acrylic resin.
  • the laminated film of the present invention is preferably arranged on the viewing side of the liquid crystal cell.
  • the laminated film 1 of this embodiment is (I) forming a layer of a cured product resin composition (hereinafter sometimes referred to as a “cured product resin composition layer”) on one surface of the stretched film 21 having a slow axis; (Ii) The polarizer layer 11 and the cured resin composition layer formed on the stretched film 21 in (i) above have a slow axis of 45 ⁇ 10 with respect to the absorption axis of the polarizer layer 11.
  • the laminate obtained in (ii) above is irradiated with active energy rays (for example, ultraviolet rays, visible light, electron beams, X-rays, etc.) and / or heated to cure the cured resin composition layer. And obtaining the adhesive layer 31.
  • active energy rays for example, ultraviolet rays, visible light, electron beams, X-rays, etc.
  • a stretched film 21 having a slow axis is prepared.
  • the elongated polarizer layer may have an absorption axis in the flow direction.
  • a laminate (laminated film) can be produced by roll-to-roll, and both can be arranged so that the angle formed by the absorption axis and the slow axis of the stretched film 21 falls within the above range.
  • the stretched film 21 is preferably manufactured by being stretched obliquely.
  • Examples of the stretching machine used for the oblique stretching include a tenter type stretching machine.
  • the tenter type stretching machine can apply a feeding force, a pulling force or a pulling force at different speeds in the left and right directions in the horizontal direction or the vertical direction or in both directions.
  • Examples of such a tenter-type stretching machine include a horizontal uniaxial stretching machine and a simultaneous biaxial stretching machine. Any suitable stretching machine can be used as long as the resin film can be continuously stretched obliquely. it can.
  • Examples of the method for forming the cured resin composition layer on one surface of the stretched film 21 include a method in which a curable resin composition is directly applied and dried as necessary. Further, as another method, there is a method in which a curable resin composition is applied to a base film and dried as necessary, and then the applied layer is transferred to the polarizer layer 11. In the latter case, the base film is removed before the step (ii). For the base film, the same resin as described above is used. Moreover, in the base film, the application surface of the curable resin composition may be subjected to a peeling treatment in advance.
  • a coating method of the curable resin composition a known coating method can be employed, and examples thereof include a doctor blade, a wire bar, a die coater, a comma coater, and a gravure coater.
  • the polarizer layer 11 and the cured resin composition layer formed on the stretched film 21 in (i) above are bonded together, and the polarizer layer 11, cured resin composition layer, stretched A laminated body in which the films 21 are laminated in this order is obtained.
  • the laminate obtained in (ii) above is irradiated with active energy rays such as visible light, ultraviolet rays, X-rays, or electron beams and / or obtained in (ii) above.
  • active energy rays such as visible light, ultraviolet rays, X-rays, or electron beams and / or obtained in (ii) above.
  • the cured resin composition layer is cured to form an adhesive layer 31 to obtain a laminated film 1.
  • the adhesive composition is cured by irradiating active energy rays.
  • the light source used for irradiation with active energy rays is not particularly limited, but a light source having a light emission distribution at a wavelength of 400 nm or less is used. Examples of such a light source include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp.
  • the irradiation intensity of the active energy ray varies depending on the adhesive composition to be cured, but it is preferable that the irradiation intensity in the wavelength region effective for activating the cationic polymerization initiator is set in the range of 10 to 2500 mW / cm 2 .
  • the irradiation time of the active energy ray varies depending on the adhesive composition to be cured, but it is preferable to set the integrated light amount represented by the product of the irradiation intensity and the irradiation time in the range of 10 to 2500 mJ / cm 2 .
  • the adhesive composition is cured by heat treatment after bonding.
  • This drying process is performed, for example, by blowing hot air.
  • the temperature of the drying treatment is, for example, in the range of 30 to 200 ° C, preferably 35 to 150 ° C, more preferably 40 to 100 ° C, and still more preferably 60 to 100 ° C.
  • the drying time is, for example, 20 to 1200 seconds.
  • the curing temperature is preferably in the range of 30 to 50 ° C, more preferably in the range of 35 to 45 ° C. When the curing temperature is within the above range, so-called “tightening” in the roll winding state is difficult to occur.
  • the humidity during curing is not particularly limited, and the relative humidity may be in the range of 0 to 70% RH.
  • the curing time is, for example, 1 to 10 days, preferably 2 to 7 days.
  • the cured resin composition layer is formed on one surface of the stretched film 21, but may be formed on one surface of the polarizer layer 11 or on both surfaces.
  • a protective film 23 may be laminated on the side of the polarizer layer 11 opposite to the side on which the stretched film 21 is bonded, and a pressure-sensitive adhesive for bonding to a liquid crystal cell.
  • a layer (not shown) may be provided.
  • the laminated film original fabric (elongated laminated film) of the present embodiment includes a strip-shaped polarizing film original fabric (elongated polarizer layer), a belt-shaped resin film original fabric (long elongated stretched film), and And an adhesive layer that bonds the polarizing film original and the resin film original.
  • the original polarizing film is a strip-shaped film made of a PVA-based resin, and a dichroic dye is oriented in the longitudinal direction of the film.
  • the PVA resin and the dichroic dye are the same as described above.
  • the resin film original is formed by stretching a strip-shaped film made of a thermoplastic resin as a forming material in a direction oblique to the longitudinal direction of the film. Thereby, a roll, a toe, and a roll are attained at the time of lamination
  • the thermoplastic resin is the same as described above.
  • the resin film original is preferably a retardation film original.
  • a slow axis is given at an arbitrary angle with respect to the absorption axis of the polarizing film original fabric.
  • the arbitrary angle is preferably 45 ⁇ 10 ° or 135 ⁇ 10 ° with respect to the absorption axis of the polarizing film original.
  • the adhesive layer contains a cured product of the same curable resin composition as described above as a forming material.
  • the glass transition temperature of the adhesive layer is 60 ° C. or higher. When the glass transition temperature is 60 ° C. or higher, the hardness of the adhesive layer 31 can be sufficiently increased. Thereby, the expansion-contraction to the direction which crosses the stretched film 21 diagonally can be suppressed in a humid heat environment (for example, the environment of 60 degreeC of room temperature, and 95% of humidity).
  • the unstretched film used in this example refers to a film that has not been stretched.
  • both films sandwiching the cured product were peeled off. Furthermore, 5 mg of the cured product was collected, put into an aluminum press-lid container, pressed down and sealed to prepare a measurement sample.
  • a container containing the above-described measurement sample was set in a differential scanning calorimeter (DSC) “EXSTAR-6000 DSC6220” sold by SII Nanotechnology Inc. Then, while flowing in nitrogen gas, the temperature is lowered from 20 ° C. to ⁇ 60 ° C., held for 1 minute after reaching ⁇ 60 ° C., and then heated from ⁇ 60 ° C. to 200 ° C. at a rate of 10 ° C./min. When the temperature reached 200 ° C., the temperature was immediately decreased to 20 ° C. Then, from the DSC curve when the temperature was raised from ⁇ 60 ° C. to 200 ° C., the midpoint glass transition temperature defined in JIS K 7121-1987 “Method for measuring plastic transition temperature” was determined. This was taken as the glass transition temperature of the adhesive layer (cured product).
  • DSC differential scanning calorimeter
  • aqueous adhesive composition (described later), one triacetyl cellulose film [trade name “KC4UY” manufactured by Konica Minolta Opto Co., Ltd.] was prepared. A water-based adhesive composition was applied to one side and dried at 80 ° C. for 5 minutes. At this time, coating and drying were repeated so that the film thickness after drying was 2 ⁇ m. Then, the sample for a measurement was produced with the method similar to the above with respect to the hardened
  • MD transmittance and TD transmittance in a wavelength range of 380 nm to 780 nm were measured with a spectrophotometer with an integrating sphere (manufactured by JASCO Corporation, “V7100”).
  • the degree of polarization at each wavelength was calculated based on the formula (T1) using the MD transmittance and the TD transmittance.
  • MD transmittance indicates the transmittance when the direction of polarized light emitted from the Glan-Thompson prism is parallel to the transmission axis of the laminated film sample.
  • TD transmittance refers to the transmittance when the direction of polarized light emitted from the Glan-Thompson prism is orthogonal to the transmission axis of the laminated film sample.
  • Alignetane (registered trademark) OXT-101 3-ethyl-3-hydroxymethyloxetane, obtained from Toagosei Co., Ltd.
  • Aron oxetane (registered trademark) OXT-221 di [(3-ethyl-3-oxetanyl) methyl] ether, obtained from Toagosei Co., Ltd.
  • Table 1 shows the structure of the oxetane compound.
  • A-DCP tricyclodecane dimethanol diacrylate, obtained from Shin-Nakamura Chemical Co., Ltd.
  • aqueous solution having a weight ratio of potassium iodide / boric acid / water of 8.5 / 8.5 / 100 at 72 ° C. for 300 seconds.
  • the film was washed with pure water at 26 ° C. for 20 seconds, and then dried at 65 ° C. to prepare a polarizer layer in which iodine was oriented on a uniaxially stretched polyvinyl alcohol film.
  • the thickness of the polarizer was 12 ⁇ m.
  • R e (590), R e (450), R e (550), R e (630) respectively, represent the measurement wavelength 590 nm, 450 nm, 550 nm, an in-plane retardation value at 630 nm
  • R th (590 ) Represents a thickness direction retardation value at a measurement wavelength of 590 nm.
  • the adhesive composition obtained in the production example was applied to the surface of the stretched film of (b) where the hard coat layer was not formed to form an adhesive composition layer.
  • the adhesive composition was applied using a bar coater (manufactured by Daiichi Rika Co., Ltd.) so that the film thickness after curing was about 2 ⁇ m.
  • a corona discharge treatment was performed on one side of an unstretched film (trade name “ZEONOR (registered trademark)” manufactured by Nippon Zeon Co., Ltd.) using a norbornene-based resin having a thickness of 23 ⁇ m as a forming material.
  • the adhesive composition was applied to the corona discharge treated surface in the same manner as the stretched film to form an adhesive composition layer.
  • the unstretched film is a raw material for the protective film in the laminated film.
  • the laminated adhesive composition layer was laminated to prepare a laminate.
  • a pasting apparatus manufactured by Fuji Pla Co., Ltd., “LPA3301”
  • the angle formed by the absorption axis of the polarizer layer and the slow axis of the stretched film was set to 45 °.
  • the accumulated light amount is 250 mJ / cm 2 from the unstretched film side of the obtained laminate.
  • the adhesive composition layer was cured by irradiating with UV rays.
  • the laminated film which consists of a protective film / polarizer layer / adhesive layer / stretched film / hard coat layer was produced.
  • Example 14 (C) A laminated film of Example 14 was produced in the same manner as in Example 1 except that the following operation was performed in the production of the laminated film.
  • the resin layer prepared in (b) above was bonded to one surface of the polarizer layer prepared in (a) via the aqueous adhesive composition obtained in the production example. Then, after drying at 80 degreeC for 5 minute (s), it cured at 40 degreeC and 23% RH for 72 hours, and produced the laminated
  • the present invention can be used as a polarization supply element or a polarization detection element in a display device such as a liquid crystal display device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Laminated Bodies (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un film stratifié qui peut maintenir un degré élevé de polarisation même dans un environnement chaud et humide. [Solution] ce film stratifié comprend : une couche de polariseur dans laquelle un colorant dichroïque est orienté dans une résine d'alcool polyvinylique; un film étiré dans lequel le matériau de formation est un film de résine qui a un axe lent dans la direction oblique par rapport à l'axe d'absorption de la couche de polariseur; et une couche adhésive qui colle ensemble la couche de polarisation et le film étiré. La couche adhésive présente une température de transition vitreuse supérieure ou égale à 60° C
PCT/JP2017/026782 2016-08-03 2017-07-25 Film stratifié Ceased WO2018025698A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020011487A (ja) * 2018-07-20 2020-01-23 ナガセケムテックス株式会社 積層体
JP2020024368A (ja) * 2018-07-26 2020-02-13 三菱ケミカル株式会社 活性エネルギー線硬化性樹脂組成物、偏光フィルム保護層、およびそれを用いた偏光板

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3971636A4 (fr) * 2019-05-17 2023-06-14 Nippon Kayaku Kabushiki Kaisha Élément optique ou plaque polarisante, et lunettes l'utilisant
JP7059409B1 (ja) 2021-01-15 2022-04-25 住友化学株式会社 光吸収異方性板

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085802A (ja) * 2008-10-01 2010-04-15 Sony Corp 位相差フィルム・偏光板積層体及び液晶表示装置
JP2012014148A (ja) * 2010-06-04 2012-01-19 Fujifilm Corp 偏光板および液晶表示装置
JP2013177547A (ja) * 2012-02-06 2013-09-09 Kohjin Holdings Co Ltd 活性エネルギー線硬化性接着剤
JP2013178466A (ja) * 2012-02-06 2013-09-09 Kohjin Holdings Co Ltd 偏光板用活性エネルギー線硬化性接着剤
JP2013536456A (ja) * 2010-11-10 2013-09-19 エルジー・ケム・リミテッド 光学素子
JP2014513325A (ja) * 2011-04-13 2014-05-29 エルジー・ケム・リミテッド 光学フィルム
JP2014215560A (ja) * 2013-04-26 2014-11-17 日東電工株式会社 偏光フィルムおよびその製造方法、光学フィルムおよび画像表示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013137521A (ja) * 2011-11-30 2013-07-11 Sumitomo Chemical Co Ltd 複合位相差板及びそれを用いた複合偏光板
JP6356408B2 (ja) * 2013-11-05 2018-07-11 住友化学株式会社 積層光学フィルムの製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085802A (ja) * 2008-10-01 2010-04-15 Sony Corp 位相差フィルム・偏光板積層体及び液晶表示装置
JP2012014148A (ja) * 2010-06-04 2012-01-19 Fujifilm Corp 偏光板および液晶表示装置
JP2013536456A (ja) * 2010-11-10 2013-09-19 エルジー・ケム・リミテッド 光学素子
JP2014513325A (ja) * 2011-04-13 2014-05-29 エルジー・ケム・リミテッド 光学フィルム
JP2013177547A (ja) * 2012-02-06 2013-09-09 Kohjin Holdings Co Ltd 活性エネルギー線硬化性接着剤
JP2013178466A (ja) * 2012-02-06 2013-09-09 Kohjin Holdings Co Ltd 偏光板用活性エネルギー線硬化性接着剤
JP2014215560A (ja) * 2013-04-26 2014-11-17 日東電工株式会社 偏光フィルムおよびその製造方法、光学フィルムおよび画像表示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020011487A (ja) * 2018-07-20 2020-01-23 ナガセケムテックス株式会社 積層体
JP2020024368A (ja) * 2018-07-26 2020-02-13 三菱ケミカル株式会社 活性エネルギー線硬化性樹脂組成物、偏光フィルム保護層、およびそれを用いた偏光板

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