WO2015115501A1 - 積層体および偏光板 - Google Patents
積層体および偏光板 Download PDFInfo
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- WO2015115501A1 WO2015115501A1 PCT/JP2015/052401 JP2015052401W WO2015115501A1 WO 2015115501 A1 WO2015115501 A1 WO 2015115501A1 JP 2015052401 W JP2015052401 W JP 2015052401W WO 2015115501 A1 WO2015115501 A1 WO 2015115501A1
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- acrylate
- optical film
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- film
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- 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
- C09J135/00—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 a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J135/02—Homopolymers or copolymers of esters
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- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09J175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
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- 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
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- 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
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- 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
- G02B5/3041—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 comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—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 comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- 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
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- 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
- C09J2421/00—Presence of unspecified rubber
- C09J2421/006—Presence of unspecified rubber in the substrate
Definitions
- the present invention relates to a laminate comprising an optical film A containing an alicyclic structure-containing polymer and an adhesive layer B, and a polarizing plate comprising the laminate.
- a laminate including the optical film A and the adhesive layer B may be referred to as “laminate C”.
- An optical film containing an alicyclic structure-containing polymer is often used as a polarizer protective film because of its excellent visibility and durability in a humid heat environment (Patent Document 1).
- An adhesive may be used when laminating an optical film containing an alicyclic structure-containing polymer and a polarizer to form a polarizing plate.
- An adhesive may be used when the polarizer is bonded to a liquid crystal display panel or a cover glass of a liquid crystal display device.
- these adhesives sometimes cause cracks in the optical film containing the alicyclic structure-containing polymer. When the crack occurs, the visibility of an image displayed on the liquid crystal display device may be reduced.
- the present invention has been made in view of the above, and in the case where an optical film containing an alicyclic structure-containing polymer is bonded to another layer via an adhesive layer to form an optical member.
- Another object of the present invention is to provide a laminate including an optical film containing an alicyclic structure-containing polymer and an adhesive layer, in which cracks and the like are not generated.
- the present inventor has found that the above problem can be solved by forming a laminate using a specific adhesive. That is, the present invention is as follows. [1] A laminate comprising an optical film A containing an alicyclic structure-containing polymer and an adhesive layer B, wherein the critical stress change rate calculated by the following formula 1 is 40% or less.
- an optical film containing an alicyclic structure-containing polymer is used as a polarizing plate protective film, a laminate is obtained in which cracks and the like are not generated and visibility is less likely to deteriorate. be able to.
- FIG. 2 is a diagram schematically showing one example of the polarizing plate of the present invention.
- FIG. 3 is a cross-sectional view schematically showing an example of a configuration in which the laminate of the present invention is applied to a liquid crystal display device.
- the “polarizing plate” and the “1 ⁇ 4 wavelength plate” include not only a rigid plate but also a flexible film such as a resin film.
- the optical film A in the present invention is a film containing an alicyclic structure-containing polymer.
- the alicyclic structure-containing polymer is a polymer having an alicyclic structure in one or both of the main chain and the side chain.
- a polymer containing an alicyclic structure in the main chain is preferable from the viewpoint of mechanical strength, heat resistance, and the like.
- the alicyclic structure include a saturated cyclic hydrocarbon (cycloalkane) structure and an unsaturated cyclic hydrocarbon (cycloalkene, cycloalkyne) structure.
- a cycloalkane structure and a cycloalkene structure are preferable, and a cycloalkane structure is particularly preferable.
- the number of carbon atoms constituting the alicyclic structure is preferably 4 or more, more preferably 5 or more, preferably 30 or less, more preferably 20 or less, particularly preferably per alicyclic structure. Is a range of 15 or less. When the number of carbon atoms constituting the alicyclic structure falls within the above range, mechanical strength, heat resistance and moldability are highly balanced, which is preferable.
- the proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer can be appropriately selected according to the use of the optical film A, but is usually 50% by weight or more, preferably 70% by weight or more, more preferably. Is 90% by weight or more.
- repeating units other than the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer can be appropriately selected depending on the purpose of use of the optical film A.
- the alicyclic structure-containing polymer examples include: (1) a norbornene polymer; (2) a polymer of a monocyclic olefin and a hydrogenated product thereof; and (3) a polymer of a cyclic conjugated diene and its hydrogen. Additives; (4) vinyl alicyclic hydrocarbon polymers; and the like.
- the (1) norbornene-based polymer include, for example, a ring-opening polymer of a norbornene-based monomer, and a ring-opening copolymer of a norbornene-based monomer and any monomer capable of ring-opening copolymerization therewith.
- the norbornene-based monomer refers to a monomer having a norbornene ring structure.
- the (4) vinyl alicyclic hydrocarbon polymer include, for example, a polymer of a vinyl alicyclic hydrocarbon monomer, an arbitrary copolymerizable with a vinyl alicyclic hydrocarbon monomer, and the like.
- examples include hydrogenated aromatic rings of copolymers with arbitrary monomers.
- norbornene-based polymers and vinyl alicyclic hydrocarbon-based polymers are preferable, hydrogenated products of norbornene-based ring-opening polymers, norbornene-based single polymers.
- an alicyclic structure containing polymer may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.
- the ratio of the alicyclic structure-containing polymer in the optical film A is preferably 67 to 100% by weight, more preferably 77 to 100% by weight.
- the optical film A may contain any component other than the alicyclic structure-containing polymer as long as the effects of the present invention are not significantly impaired.
- optional components other than alicyclic structure-containing polymers include antioxidants, heat stabilizers, light stabilizers, UV absorbers, antistatic agents, dispersants, chlorine scavengers, flame retardants, and crystallization. Nucleating agent, reinforcing agent, antiblocking agent, antifogging agent, mold release agent, pigment, organic or inorganic filler, neutralizing agent, lubricant, decomposing agent, metal deactivator, antifouling agent, and antibacterial agent, In addition, known additives such as polymers other than alicyclic structure-containing polymers and thermoplastic elastomers may be mentioned.
- the amount of any component other than the alicyclic structure-containing polymer contained in the optical film A is within a range that does not impair the effects of the present invention, and is usually 50 with respect to 100 parts by weight of the alicyclic structure-containing polymer. It is 30 parts by weight or less, preferably 30 parts by weight or less. The lower limit is zero.
- the optical film A may be a single-layer structure film having only one layer or a multilayer structure film having two or more layers.
- the said layer may contain an alicyclic structure containing polymer.
- the layer farthest from the adhesive layer B preferably contains an alicyclic structure-containing polymer.
- a masking film may be bonded to the surface of the optical film A farthest from the adhesive layer B. At this time, when the layer of the optical film A farthest from the adhesive layer B contains the alicyclic structure-containing polymer, the masking film can be easily peeled off.
- the optical film A preferably has a function of absorbing ultraviolet rays for the purpose of preventing deterioration of the polarizer and the liquid crystal element due to external light.
- the above-described ultraviolet absorber may be contained in the optical film A having a single layer structure.
- middle layer of the optical film A of a multilayer structure contains a ultraviolet absorber from the reason which prevents the contamination of the roll in a process, or a film.
- the intermediate layer of the optical film A having a multilayer structure refers to a layer that is not exposed on the front surface and the back surface of the optical film A among the plurality of layers provided in the optical film A.
- the layers other than the layer closest to the adhesive layer B and the layer farthest from the adhesive layer B are intermediate layers.
- the light transmittance at a wavelength of 380 nm of the optical film A having the function of absorbing ultraviolet rays is preferably 0.02% to 8.0%, more preferably 0.05% to 5.0%.
- the light transmittance at a wavelength of 370 nm of the optical film A having an ultraviolet absorption function is preferably 2% or less, more preferably 1% or less.
- the transmittance at a wavelength of 400 nm of the optical film A having an ultraviolet absorption function is preferably 65% or more.
- the light transmittance at a wavelength of 420 nm to 780 nm of the optical film A having the function of absorbing ultraviolet rays is preferably 85% or more, more preferably 88% or more.
- the entire laminate C may be considerably yellowish. Therefore, when the laminate C is mounted on a display device such as a liquid crystal display device, it may be colored particularly when used for a long period of time. Conversely, if the light transmittance at a wavelength of 380 nm exceeds 8.0%, the polarizer may be changed by ultraviolet rays, and the degree of polarization may decrease. Further, when the light transmittance at a wavelength of 420 nm to 780 nm is less than 85%, when the laminate C is mounted on a display device such as a liquid crystal display device, the luminance particularly when used for a long period of time may be lowered.
- the optical film A can be made to contain the above-mentioned ultraviolet absorber, and the optical film A can have an ultraviolet absorption function.
- the ultraviolet absorber for example, known ones such as a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, and an acrylonitrile ultraviolet absorber can be used.
- Examples of the ultraviolet absorber include 2,2′-methylenebis (4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol), 2- (2 '-Hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2,4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol, 2 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone and the like are preferably used.
- 2,2′-methylenebis (4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol) is particularly preferable.
- Examples of a method for obtaining the optical film A containing the ultraviolet absorber include, for example, a method in which an ultraviolet absorber is previously blended into a resin of an alicyclic structure-containing polymer; and a master batch containing a high concentration of the ultraviolet absorber.
- the method to be used; a method of directly supplying an ultraviolet absorber to the resin at the time of melt extrusion molding of the resin, and the like, and any method may be adopted.
- the content of the ultraviolet absorber is preferably 0.5% by weight to 7.0% by weight, more preferably 1.0% by weight to 5.0% by weight, based on 100% by weight of the entire optical film A.
- the variation in the concentration of the ultraviolet absorber is preferably within ⁇ 0.1% over the entire surface.
- the content of the ultraviolet absorber When the content of the ultraviolet absorber is less than 0.5% by weight, the light transmittance at wavelengths of 370 nm and 380 nm increases, and when the laminate C is used as a masking film for a polarizing plate, the degree of polarization of the polarizer is May be reduced. On the other hand, when the content of the ultraviolet absorber exceeds 7.0% by weight, the light transmittance on the short wavelength side is decreased, and the yellowness of the laminate C may be increased. However, the content of the ultraviolet absorber can be appropriately changed depending on the thickness of the optical film A.
- the dispersion of the concentration of the ultraviolet absorber is within ⁇ 0.1% by weight over the entire surface, so that there is no uneven color tone of the initial optical film A, and the deterioration due to ultraviolet rays after long-term use occurs uniformly. Color unevenness is less likely to occur when the laminated body C is mounted. If the variation in the concentration of the UV absorber exceeds ⁇ 0.1% by weight over the entire surface, uneven color tone can be clearly seen, which may result in poor color tone. Further, after long-term use, deterioration due to ultraviolet rays becomes non-uniform, and the color tone may be further deteriorated.
- the thickness of the optical film A is preferably 5.0 ⁇ m to 1000 ⁇ m, more preferably 10 ⁇ m to 500 ⁇ m, and particularly preferably 10 ⁇ m to 100 ⁇ m. Even when the optical film A has a multilayer structure, the total thickness is preferably within the above range. In the case where the optical film A has a multilayer structure, the thickness of the layers can be adjusted according to the use or the like.
- the thickness of the intermediate layer is preferably 2.0 ⁇ m or more and 500 ⁇ m or less, more preferably 5.0 ⁇ m or more and 50 ⁇ m or less. It is particularly preferably not less than 0.0 ⁇ m and not more than 40 ⁇ m.
- the optical film A used in the present invention can be obtained by forming a film containing an alicyclic structure-containing polymer and a resin containing optional components as required by a known method.
- the method include a cast molding method, an extrusion molding method, an inflation molding method, and stretching.
- the extrusion molding method is preferable because the amount of residual volatile components is small and dimensional stability is excellent.
- the content of the residual volatile component in the optical film A is preferably 0.1% by weight or less, more preferably 0.05% by weight or less, and further preferably 0.02% by weight or less. If the content of the residual volatile component is large, the optical characteristics of the laminate C may change over time.
- the optical film A may be a single layer as described above, or may have a multilayer structure of two or more layers.
- the optical film A can be obtained by a known method such as a coextrusion molding method, a film lamination method, or a coating method, but a coextrusion molding method is preferable.
- the optical film A has a variation in film thickness of preferably 5% or less, more preferably 4% or less with respect to the average thickness.
- the variation in film thickness is a value obtained by subtracting the minimum value from the maximum value among the values obtained by measuring the optical film A at equal intervals in the width direction.
- the average thickness is an average value of values obtained by measuring the optical film A at equal intervals in the width direction.
- the optical film A is obtained by stretching an unstretched film
- a film subjected to a known stretching process such as uniaxial stretching, biaxial stretching, or oblique stretching can be appropriately employed.
- the stretching method is not particularly limited, and examples thereof include roll-type and float-type longitudinal stretching methods; tenter-type lateral uniaxial stretching; and simultaneous biaxial stretching.
- the temperature at which the unstretched film is stretched is preferably in the temperature range of Tg-30 ° C to Tg + 60 ° C, more preferably Tg-10 ° C to Tg + 50 ° C.
- the Tg is a glass transition temperature of a resin containing the alicyclic structure-containing polymer.
- the draw ratio is usually 1.01 to 30 times, preferably 1.01 to 10 times, more preferably 1.01 to 5 times.
- the optical film A is preferably a film having the characteristics of a quarter wavelength plate.
- the film having the characteristics of a quarter wavelength plate means that the in-plane retardation value (Re) for transmitted light of visible light 550 nm is 80 nm to 160 nm and the retardation value (Rth) in the film thickness direction.
- the in-plane retardation (Re) is a value obtained by multiplying the difference between the refractive index nx in the in-plane slow axis direction and the refractive index ny in the direction perpendicular to the slow axis in the plane by the average thickness d of the film.
- (Re (nx ⁇ ny) ⁇ d).
- nx is the refractive index in the in-plane slow axis direction
- ny is the refractive index in the direction perpendicular to the slow axis in the plane
- nz is the refractive index in the thickness direction
- d is the average thickness of the film.
- the in-plane retardation value (Re) of the optical film A is preferably 80 nm to 160 nm, and more preferably 90 nm to 150 nm.
- the variation in retardation (Re) in the in-plane direction of the optical film A is preferably within 10 nm, more preferably within 5 nm, and particularly preferably within 2 nm.
- the retardation value (Rth) in the film thickness direction of the optical film A is preferably ⁇ 250 nm to +150 nm, more preferably ⁇ 80 nm to +150 nm, and still more preferably 40 nm to 150 nm.
- the variation of the retardation value (Rth) in the film thickness direction of the optical film A is preferably within 10 nm, more preferably within 5 nm, and particularly preferably within 2 nm.
- the adhesive layer B can be formed by applying an adhesive on the optical film A containing the alicyclic structure-containing polymer.
- the adhesive layer B can be formed by laminating a sheet-like adhesive layer on the optical film A containing the alicyclic structure-containing polymer.
- the adhesive layer represents a layer made of an adhesive.
- Such adhesives usually contain a resin as a main component.
- main component means a component having a weight ratio of usually 30% by weight or more, preferably 40% by weight or more, more preferably 50% by weight or more.
- an ultraviolet curable resin is preferably used as this resin.
- the adhesive layer B is irradiated with ultraviolet rays while the surface of the laminate C on the adhesive layer B side is bonded to an arbitrary member.
- the adhesive layer B can be cured to bond the laminate C to any member.
- the adhesive or the adhesive layer is not particularly limited as long as the layered product C has a critical stress change rate calculated by Equation 1 of 40% or less, but is optically transparent.
- optically transparent means that the total light transmittance in terms of 1 mm thickness is 88% or more. This total light transmittance can be measured using a spectrophotometer (manufactured by JASCO Corporation, ultraviolet-visible near-infrared spectrophotometer “V-570”) in accordance with JIS K0115.
- a urethane-based adhesive or an adhesive layer is particularly preferable, and a urethane acrylate adhesive or an adhesive layer is particularly preferable.
- the urethane acrylate adhesive is an adhesive including urethane acrylate.
- Urethane acrylate is not particularly limited. Urethane acrylate is synthesized from components such as hydroxyl-modified hydrogenated polybutadiene, isophorone diisocyanate, 2-hydroxyethyl acrylate, 2-ethylhexyl acrylate, 4-acryloylmorpholine, ⁇ -caprolactone, trimethylhexamethylene diisocyanate, polypropylene glycol and the like. Are preferred.
- the adhesive or the adhesive layer may contain, for example, a (meth) acrylate compound, a polyfunctional (meth) acrylic compound, or an isocyanate compound.
- (Meth) acrylate includes both acrylate and methacrylate.
- (meth) acryl includes both acryl and methacryl.
- Examples of (meth) acrylate compounds include (meth) acrylate having one polymerizable unsaturated group in the molecule, (meth) acrylate having two polymerizable unsaturated groups in the molecule, and polymerizable unsaturated group.
- (Meth) acrylate having 3 or more in the molecule and (meth) acrylate oligomer containing 3 or more polymerizable unsaturated groups in the molecule.
- the (meth) acrylate compound may be used alone or in combination of two or more. Among these, since flexibility can be imparted, (meth) acrylate having one polymerizable unsaturated bond in the molecule is preferably used.
- Examples of (meth) acrylate having one polymerizable unsaturated group in the molecule include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, and octyl (meth) acrylate.
- Examples of the (meth) acrylate having two polymerizable unsaturated groups in the molecule include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, and polyethylene glycol di (meth).
- Examples of the (meth) acrylate having three or more polymerizable unsaturated groups in the molecule include glycerin tri (meth) acrylate, glycerin alkylene oxide tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, and trimethylolpropane.
- isocyanate compound examples include hexamethylene diisocyanate, 2,2,4-trimethylhexane diisocyanate, hexane diisocyanate, 1,4-cyclohexane diisocyanate, methylcyclohexylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, tolylene diisocyanate, 4,4.
- the ratio of urethane acrylate is preferably 10% by weight or more and 90% by weight or less, and more preferably 30% by weight or more and 80% by weight or less with respect to the total amount of the adhesive.
- the adhesive and adhesive layer that can be used include the SVR series (manufactured by Dexials), the TE-9000 series (manufactured by Hitachi Chemical Co., Ltd.), the ThreeBond 1500 series, the 1600 series (manufactured by ThreeBond), and the word lock.
- HRJ series manufactured by Kyoritsu Chemical Industry Co., Ltd.
- the amount of the material having high compatibility with the alicyclic structure-containing polymer is preferably 25% by weight or less. Furthermore, it is preferable that the adhesive and the adhesive layer do not contain a material having high compatibility with the alicyclic structure-containing polymer. By using such an adhesive or an adhesive layer, it is possible to satisfy that the critical stress change rate calculated by Equation 1 is 40% or less.
- the “material highly compatible with the alicyclic structure-containing polymer” refers to a material that is judged to be highly compatible by the following test method.
- Test method A film having a thickness of 100 ⁇ m prepared from an alicyclic structure-containing polymer is prepared. A material is dropped onto the film as a sample and left for 30 minutes. The material is wiped off and the film is observed. If one or more of whitening, cracking and deformation appears in the film, it is judged that the compatibility of the material as the sample is high.
- the adhesive and the adhesive layer include isobornyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, benzyl (meth) acrylate, decyl (meth) acrylate, n-dodecyl (meta) ) It is preferable not to contain a material having high compatibility with an alicyclic structure-containing polymer such as acrylate, cyclohexane, n-octane, toluene, terpene resin, styrene-modified terpene resin, dimethyl 1,4-cyclohexanedicarboxylate, etc. .
- the thickness of the adhesive layer B is usually 1 ⁇ m to 400 ⁇ m, and is appropriately determined depending on the place where the adhesive is used.
- the method for forming the adhesive layer is not particularly limited, and a known coating method can be employed.
- Specific examples of the coating method include a dipping method, a spray method, a slide coating method, a bar coating method, a roll coater method, a die coater method, a gravure coater method, and a screen printing method.
- the laminate C including the optical film A containing the alicyclic structure-containing polymer and the adhesive layer B forms the adhesive layer B on the surface of the optical film A containing the alicyclic structure-containing polymer. It can be manufactured by applying an adhesive. Or the laminated body C can be manufactured by laminating
- the laminate C has a critical stress change rate calculated by the following formula 1 of 40% or less, preferably 30% or less. In Equation 1, “limit stress of laminate” represents “limit stress of laminate C”. This critical stress change rate is usually 0% or more.
- That the critical stress change rate calculated by Equation 1 is 40% or less is achieved by using a material made of a specific material as an adhesive as described above.
- the measurement of the critical stress of the optical film A is performed by fixing the test piece of the optical film A along the jig shown in FIG. 1 (cross-sectional view) and observing the occurrence of craze.
- the thickness ratio of each layer of the optical film A and the thickness of the layer made of each material in a plate having a thickness of 1 mm is manufactured so that the ratio is the same.
- the position where the craze is entered can be measured by the strain generated in the test piece along the curvature of the ellipse of the jig, and the degree of stress at which the craze is generated can be evaluated.
- the critical stress of the laminate C is measured by fixing a laminate sample as a film piece of the laminate C along the jig shown in FIG. 1 (cross-sectional view) and observing the occurrence of craze. Is called.
- the laminate sample is fixed to the jig such that the surface on the optical film A side is in contact with the jig.
- a plate having a thickness of 1 mm is produced using a material normally used for the optical film A, and this plate is used in place of the optical film A to obtain a laminate sample.
- Is preferably prepared. In this case, an adhesive layer B and an arbitrary layer are formed on the above plate in the same manner as the laminate C to produce a laminate sample.
- an arbitrary layer can be provided between the optical film A and the adhesive layer B as necessary.
- the optional layer include a hard coat layer, an index matching layer, an antistatic layer, and a conductive layer.
- a material that exhibits a hardness of “HB” or higher in a pencil hardness test specified in JIS K5700 is suitable.
- examples of such a material include organic hard coat layer forming materials such as organic silicone, melamine, epoxy, (meth) acrylate, and polyfunctional (meth) acrylic compounds; inorganic hard such as silicon dioxide Coating layer forming material; and the like.
- organic hard coat layer forming materials such as organic silicone, melamine, epoxy, (meth) acrylate, and polyfunctional (meth) acrylic compounds
- inorganic hard such as silicon dioxide Coating layer forming material
- the (meth) acrylate-based hard coat layer forming material for example, (meth) acrylate having one polymerizable unsaturated group in the molecule, (meth) acrylate having two polymerizable unsaturated groups in the molecule, Examples thereof include (meth) acrylate having three or more polymerizable unsaturated groups in the molecule and (meth) acrylate oligomer having three or more polymerizable unsaturated groups in the molecule.
- the (meth) acrylate-based hard coat layer forming material may be used alone or in combination of two or more.
- the method for forming the hard coat layer is not particularly limited.
- the hard coat layer can be formed, for example, by applying a coating liquid of a hard coat layer forming material on the optical film A, removing the solvent by drying, and then crosslinking and curing with an ultraviolet ray, an electron beam or the like.
- a coating method of the coating solution a known method such as a dipping method, a spray method, a slide coating method, a bar coating method, a roll coater method, a die coater method, a gravure coater method, a screen printing method, or the like can be used.
- the coating solution can be dried in an atmosphere such as air or nitrogen, for example.
- the hard coat layer can be formed by, for example, applying a silicone-based, melamine-based, or epoxy-based hard coat layer material on the optical film A and thermally curing the material. Unevenness of the coating film tends to occur during drying. Therefore, at the time of drying, it is preferable to adjust the intake air and exhaust air so as not to impair the appearance of the coating film, and to control the entire coating film to be uniform.
- the irradiation time for curing the hard coat layer forming material after application by ultraviolet irradiation is usually in the range of 0.01 seconds to 10 seconds.
- the irradiation amount of energy radiation source of accumulative exposure at an ultraviolet wavelength of 365 nm usually ranges from 40 mJ / cm 2 of 1000 mJ / cm 2. Further, the irradiation with ultraviolet rays may be performed in an inert gas such as nitrogen and argon, or may be performed in the air.
- the optical film A may be subjected to a surface treatment for the purpose of improving adhesiveness with the hard coat layer.
- a surface treatment examples include plasma treatment, corona treatment, alkali treatment, and coating treatment.
- the coating liquid for the hard coat layer forming material may be applied immediately after the corona treatment, or may be applied after neutralization, but since the appearance of the hard coat layer becomes good, It is preferable to apply.
- the average thickness of the hard coat layer is usually 0.5 ⁇ m or more and 30 ⁇ m or less, preferably 2 ⁇ m or more and 15 ⁇ m or less. If the thickness of the hard coat layer is too thick, the visibility may be lowered, and if it is too thin, the scratch resistance may be inferior.
- the haze of the hard coat layer is usually 0.5% or less, preferably 0.3% or less.
- the hard coat layer forming material is, for example, organic particles, inorganic particles, photosensitizers, polymerization inhibitors, polymerization initiation assistants, leveling agents, wettability improvers, surfactants, plasticizers, ultraviolet absorbers, An antioxidant, an antistatic agent, a silane coupling agent, and the like may be included.
- the laminated body C can be made into a polarizing plate by bonding with a polarizer.
- a polarizing plate can be obtained as shown in FIG.
- it can also be set as a polarizing plate by providing another adhesive layer on the opposite surface to the adhesive layer B side of the laminated body C, and bonding with a polarizer.
- the optical film A can function as a polarizing plate protective film.
- the polarizer is not particularly limited.
- a dichroic substance such as iodine or a dichroic dye is adsorbed on a hydrophilic polymer film such as a polyvinyl alcohol film or an ethylene vinyl acetate partially saponified film, and is uniaxially stretched.
- a hydrophilic polymer film such as a polyvinyl alcohol film or an ethylene vinyl acetate partially saponified film
- a polyene-oriented film such as a dehydrated polyvinyl alcohol product or a dehydrochlorinated polyvinyl chloride product.
- Other examples include a polarizer having a function of separating polarized light such as grid polarizer and multilayer polarizer into reflected light and transmitted light.
- the polarizing plate can be bonded to a liquid crystal panel and a cover glass to form a liquid crystal display device as in the example shown in FIG.
- a cover glass 50 is attached to the adhesive layer B side
- the polarizer 40 is attached to the opposite surface of the adhesive layer B via another adhesive layer 60
- the liquid crystal A configuration in which the liquid crystal display device 200 is bonded to the panel 80 is illustrated.
- the laminated body sample was fixed to the jig so that the surface on the optical film A side was in contact with the jig.
- the sample was allowed to stand at 25 ° C. for 1 hour, and the distance L (cm) on the curved surface between the position where the crazing occurred and the starting point a of the elliptical jig was measured.
- L and the thickness t (cm) of the test piece From the value of L and the thickness t (cm) of the test piece, the strain E was calculated by Equation 2. The critical stress was determined from the product of this strain E and the flexural modulus of the optical film A.
- the bending elastic modulus of the alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd., glass transition temperature 123 ° C.) used in Reference Example 1 below was 2.2 ⁇ 10 4 kgf / cm 2 .
- the flexural modulus of the mixture of the alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd., glass transition temperature 123 ° C.) and the benzotriazole UV absorber used in Reference Example 2 below is 1.95 ⁇ 10. It was 4 kgf / cm 2 .
- Example 1 (Manufacture of adhesive 1) Uniformly stir a mixture of 50 parts urethane acrylate, 30 parts pentaerythritol triacrylate, 10 parts ethoxylated phenonyl acrylate, 4 parts 4-acryloylmorpholine, 3 parts benzyl acrylate and 3 parts Irgacure 184 (BASF). The adhesive 1 was produced.
- the adhesive 1 was applied to one side of the optical film 1 using a bar coater to produce a laminate 1.
- the manufactured laminate 1 was provided with the optical film 1 and the adhesive layer B having a thickness of 100 ⁇ m.
- the critical stress of the laminate 1 was measured by the measurement method, and the critical stress change rate with the optical film 1 was calculated. The results are shown in Table 1.
- Example 2 Manufacture of laminated body 2
- the adhesive 2 (LE-3000 series; manufactured by Hitachi Chemical Co., Ltd.) was used instead of the adhesive 1, and the critical stress was measured in the same manner. did.
- the critical stress change rate with the optical film 1 was also calculated, and the results are shown in Table 1.
- Example 3 Manufacture of laminate 3
- a laminate 3 was produced in the same manner as in Example 1 except that the optical film 1 was changed to the optical film 2, and the critical stress was measured in the same manner.
- the critical stress change rate with the optical film 2 was also calculated, and the results are shown in Table 1.
- Example 4 Manufacture of laminated body 4
- a laminate 4 was produced in the same manner as in Example 2 except that the optical film 1 was changed to the optical film 2, and the critical stress was measured in the same manner.
- the critical stress change rate with the optical film 2 was also calculated, and the results are shown in Table 1.
- Example 5 Manufacture of optical film 3 An optical film 3 was produced in the same manner as in Reference Example 1 except that the thickness of the optical film was changed to 50 ⁇ m.
- Example 6 Manufacture of optical film 4
- An optical film 4 was produced in the same manner as in Reference Example 2 except that the thickness of the optical film was changed to 50 ⁇ m.
- Example 7 Manufacture of adhesive 3
- Example 8 Manufacture of laminated body 8) Except having changed the optical film 1 into the optical film 3, the laminated body 8 was manufactured similarly to Example 7, and the limit stress was measured similarly. The critical stress change rate with the optical film 3 was also calculated, and the results are shown in Table 1.
- Laminates 1 to 13 were bonded to polarizers doped with iodine and uniaxially stretched, and irradiated with ultraviolet rays to obtain polarizing plates 1 to 13.
- the obtained polarizing plates 1 to 13 were placed in an oven at 90 ° C. for 2 hours, and then the end face was visually observed to check for cracks. The confirmed results are summarized in Table 1.
- the laminate C containing the alicyclic structure-containing polymer of the present invention is excellent in visibility without causing cracks or crazes in the optical film A due to the influence of the adhesive layer B.
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Abstract
Description
すなわち、本発明は、下記の通りである。
〔1〕脂環式構造含有重合体を含む光学フィルムAと粘接着層Bとを備える積層体において、下記式1で計算される限界応力変化率が40%以下である積層体。
〔3〕前記粘接着層Bがウレタンアクリレートを含む〔1〕または〔2〕に記載の積層体。
〔4〕前記粘接着層Bにおける、前記脂環式構造含有重合体と相溶性が高い材料の量が、25重量%以下である〔1〕~〔3〕のいずれか1項に記載の積層体。
〔5〕〔1〕~〔4〕のいずれかに記載の積層体と偏光子とを含む偏光板。
以下の説明において、別に断らない限り、「偏光板」及び「1/4波長板」は、剛性の板だけでなく、樹脂フィルム等の可撓性のあるフィルムを包含する。
本発明における光学フィルムAは、脂環式構造含有重合体を含むフィルムである。脂環式構造含有重合体とは、主鎖及び側鎖の一方又は両方に脂環式構造を有する重合体である。中でも、機械的強度、耐熱性などの観点から、主鎖に脂環式構造を含有する重合体が好ましい。脂環式構造としては、例えば、飽和環状炭化水素(シクロアルカン)構造、不飽和環状炭化水素(シクロアルケン、シクロアルキン)構造などを挙げることができる。中でも、機械的強度および耐熱性などの観点から、シクロアルカン構造及びシクロアルケン構造が好ましく、シクロアルカン構造が特に好ましい。
脂環式構造含有重合体中の脂環式構造を有する繰り返し単位の割合は、光学フィルムAの用途に応じて適宜選択しうるが、通常50重量%以上、好ましくは70重量%以上、より好ましくは90重量%以上である。脂環式構造を有する繰り返し単位の割合が過度に少ないと、耐熱性が低下する可能性がある。なお、脂環式構造含有重合体中における脂環式構造を有する繰り返し単位以外の繰り返し単位は、光学フィルムAの使用目的に応じて適宜選択されうる。
なお、脂環式構造含有重合体は、1種類を単独で用いてもよく、2種類以上を任意の比率で組み合わせて用いてもよい。
粘接着層Bは、脂環式構造含有重合体を含む光学フィルムA上に粘接着剤を塗布することによって形成しうる。または、粘接着層Bは、脂環式構造含有重合体を含む光学フィルムA上にシート状の粘接着層を積層することによって形成しうる。ここで粘接着層とは、粘接着剤からなる層を表す。前記のような粘接着剤は、通常、樹脂を主成分として含む。ここで「主成分」とは、通常30重量%以上、好ましくは40重量%以上、より好ましくは50重量%以上の重量割合の成分をいう。この樹脂としては、紫外線硬化樹脂を用いることが好ましい。粘接着剤として紫外線硬化樹脂を用いた場合、通常は、積層体Cの粘接着層B側の面を任意の部材に貼り合わせた状態で粘接着層Bに紫外線を照射することにより、粘接着層Bを硬化させて、積層体Cと任意の部材との接着を行うことができる。
(試験方法)
脂環式構造含有重合体で作製した厚み100μmのフィルムを用意する。このフィルム上へ、試料として材料を滴下し、30分放置する。材料をふき取り、前記のフィルムを観察する。白化、クラック及び変形の1つ以上がフィルムに現れている場合、前記試料としての材料の相溶性は高いと判断する。
脂環式構造含有重合体を含む光学フィルムAと粘接着層Bとを備える積層体Cは、脂環式構造含有重合体を含む光学フィルムAの表面に、粘接着層Bを形成する粘接着剤を塗布することで製造しうる。または、積層体Cは、脂環式構造含有重合体を含む光学フィルムAの表面に粘接着層Bを積層することによって製造しうる。粘接着剤の塗布に先立って、脂環式構造含有重合体を含む光学フィルムAに表面処理を施してもよい。該表面処理としては、例えば、プラズマ処理、コロナ処理、アルカリ処理、コーティング処理等が挙げられる。
積層体Cは、下記式1で計算される限界応力変化率が、40%以下、好ましくは30%以下である。式1において、「積層体の限界応力」は、「積層体Cの限界応力」を表す。この限界応力変化率は、通常0%以上である。
積層体Cは、偏光子と貼り合せることによって偏光板とすることができる。例えば、積層体Cの粘接着層B側を偏光子に貼りわせることによって、図2のように偏光板とすることができる。また、積層体Cの粘接着層B側とは逆の面に別の粘接着層を設けて偏光子と貼り合せることによっても偏光板とすることができる。光学フィルムAは偏光板保護フィルムとして機能しうる。偏光子は、特に制限はないが、例えば、ポリビニルアルコールフィルムやエチレン酢酸ビニル部分ケン化フィルム等の親水性高分子フィルムにヨウ素や二色性染料などの二色性物質を吸着させて一軸延伸させたもの;前記親水性高分子フィルムを一軸延伸して二色性物質を吸着させたもの;ポリビニルアルコールの脱水処理物やポリ塩化ビニルの脱塩酸処理物等のポリエン配向フィルムなどが挙げられる。その他に、グリッド偏光子、多層偏光子などの偏光を反射光と透過光に分離する機能を有する偏光子が挙げられる。
前記偏光板は、液晶パネル及びカバーガラスと貼り合せて、図3に示す例のように、液晶表示装置とすることができる。図3においては、粘接着層B側にはカバーガラス50を添付し、粘接着層Bとは逆の面に別の粘接着層60を介して偏光子40と貼付し、さらに液晶パネル80と貼り合せて液晶表示装置200とした構成を例示する。
〔積層体Cの限界応力の測定方法〕
厚さ1mmの光学フィルムAを10mm×90mmのサイズに切断し、試験片を作製した。得られた試験片へ、厚さ100μmになるように、粘接着剤を塗布し、積層体サンプルを作製した。積層体サンプルの作製後、1分以内に、積層体サンプルを図1(断面図)に示す治具に固定した。図1で示される治具の断面形状は、x2/1002+y2/402=1で表される曲線を有する楕円を四分の一に切った形状(1/4楕円形状)となっていた。また、積層体サンプルは、光学フィルムA側の面が治具に接触するように、治具に固定した。このように積層体サンプルを治具に固定した状態で、25℃で1時間静置し、クレーズが発生した位置と楕円治具の始点aとの曲面上の距離L(cm)を測定した。Lの値と試験片の厚みt(cm)から、式2により、歪みEを算出した。この歪みEと、光学フィルムAの曲げ弾性係数との積から、限界応力を求めた。なお、下記の参考例1で用いた脂環式構造含有重合体(日本ゼオン社製、ガラス転移温度123℃)の曲げ弾性係数は、2.2×104kgf/cm2であった。また、下記の参考例2で用いた脂環式構造含有重合体(日本ゼオン社製、ガラス転移温度123℃)とベンゾトリアゾール系紫外線吸収剤との混合物の曲げ弾性係数は、1.95×104kgf/cm2であった。
光学フィルムAの試験片に粘接着剤を塗布する工程を行わないで、光学フィルムAの試験片を積層体サンプルの代わりに用いた。以上の事項以外は、前記[積層体Cの限界応力の測定方法]と同様にして、光学フィルムAの限界応力を測定した。
(光学フィルム1の製造)
脂環式構造含有重合体(日本ゼオン社製、ガラス転移温度123℃)のペレットを100℃で5時間乾燥した。該ペレットを押出機に供給し、260℃の条件で射出成形を行い、厚さ1mmの光学フィルム1を得た。得られた光学フィルム1の限界応力を前記測定方法により測定した。
(光学フィルム2の製造)
乾燥させた脂環式構造含有重合体(日本ゼオン社製、ガラス転移温度123℃)100部と、ベンゾトリアゾール系紫外線吸収剤(「LA-31」、ADEKA社製)5.5部とを、二軸押出機により混合して、混合物を得た。次いで、その混合物を押出機に接続されたホッパーへ投入し、単軸押出機へ供給して溶融押出し、ペレットを作製した。該ペレットを、参考例1と同様にしてフィルム化し、厚さ1mmの光学フィルム2を得た。光学フィルム2の限界応力を前記測定方法により測定した。
(粘接着剤1の製造)
ウレタンアクリレート50部、ペンタエリスリトール トリアクリレート30部、エトキシ化フェノニルアクリレート10部、4-アクリロイルモルホリン4部、ベンジルアクリレート3部、イルガキュアー184(BASF社)3部からなる混合液を均一に攪拌し、粘接着剤1を作製した。
光学フィルム1の片面に粘接着剤1をバーコーターを用い塗布して、積層体1を製造した。製造された積層体1は、光学フィルム1及び厚み100μmの粘接着層Bを備えていた。前記測定方法により、積層体1の限界応力を測定し、光学フィルム1との限界応力変化率を算出した。結果を表1に記載した。
(積層体2の製造)
粘接着剤1の代わりに粘接着剤2(LE-3000シリーズ;日立化成社製)を用いた以外は、実施例1と同様にして積層体2を製造し、同様に限界応力を測定した。光学フィルム1との限界応力変化率も算出し、結果を表1に記載した。
(積層体3の製造)
光学フィルム1を光学フィルム2に変えた以外は、実施例1と同様にして積層体3を製造し、同様に限界応力を測定した。光学フィルム2との限界応力変化率も算出し、結果を表1に記載した。
(積層体4の製造)
光学フィルム1を光学フィルム2に変えた以外は、実施例2と同様にして積層体4を製造し、同様に限界応力を測定した。光学フィルム2との限界応力変化率も算出し、結果を表1に記載した。
(光学フィルム3の製造)
光学フィルムの厚みを50μmに変更した以外は、参考例1と同様にして光学フィルム3を製造した。
光学フィルム1を光学フィルム3に変えた以外は、実施例1と同様にして積層体5を製造し、同様に限界応力を測定した。光学フィルム3との限界応力変化率も算出し、結果を表1に記載した。
(光学フィルム4の製造)
光学フィルムの厚みを50μmに変更した以外は、参考例2と同様にして光学フィルム4を製造した。
光学フィルム1を光学フィルム4に変えた以外は、実施例2と同様にして積層体6を製造し、同様に限界応力を測定した。光学フィルム4との限界応力変化率も算出し、結果を表1に記載した。
(粘接着剤3の製造)
ウレタンアクリレート70部、ペンタエリスリトール トリアクリレート20部、メトキシエチルメタクリレート7部、イルガキュアー184(BASF社)3部からなる混合液を均一に攪拌し、粘接着剤3を作製した。
粘接着剤1を粘接着剤3に変えた以外は、実施例1と同様にして、積層体7を製造し、同様に限界応力を測定した。光学フィルム1との限界応力変化率も算出し、結果を表1に記載した。
(積層体8の製造)
光学フィルム1を光学フィルム3に変えた以外は、実施例7と同様にして、積層体8を製造し、同様に限界応力を測定した。光学フィルム3との限界応力変化率も算出し、結果を表1に記載した。
(粘接着剤4の製造)
ウレタンアクリレート50部、イソボニルアクリレート37部、デシルアクリレート10部、イルガキュアー184(BASF社)3部からなる混合液を均一に攪拌し、粘接着剤4を作製した。
粘接着剤1を粘接着剤4に変えた以外は、実施例1と同様にして積層体9を製造し、同様に限界応力を測定した。光学フィルム1との限界応力変化率も算出し、結果を表1に記載した。
(積層体10の製造)
光学フィルム1を光学フィルム2に変えた以外は、比較例1と同様にして積層体10を製造し、同様に限界応力を測定した。光学フィルム2との限界応力変化率も算出し、結果を表1に記載した。
(粘接着剤5の製造)
ウレタンアクリレート40部、ペンタエリスリトール トリアクリレート27部、テルペン樹脂30部、イルガキュアー184(BASF社)3部からなる混合液を均一に攪拌し、粘接着剤5を作製した。
粘接着剤1を粘接着剤5に変えた以外は、実施例1と同様にして積層体11を製造し、同様に限界応力を測定した。光学フィルム1との限界応力変化率も算出し、結果を表1に記載した。
(積層体12の製造)
光学フィルム1を光学フィルム3に変えた以外は、比較例1と同様にして積層体12を製造し、同様に限界応力を測定した。光学フィルム3との限界応力変化率も算出し、結果を表1に記載した。
(積層体13の製造)
光学フィルム1を光学フィルム4に変えた以外は、比較例1と同様にして積層体13を製造し、同様に限界応力を測定した。光学フィルム4との限界応力変化率も算出し、結果を表1に記載した。
ヨウ素をドープして一軸に延伸した偏光子に積層体1~13をそれぞれ貼り合せ、紫外線を照射し、偏光板1~13を得た。得られた偏光板1~13を90℃のオーブンに2時間入れたあとに、端面を目視観察し、クラックを確認した。確認した結果を表1にまとめた。
20 粘接着層B
30 積層体C
40 偏光子
50 カバーガラス
60、70 他の粘接着層
80 液晶パネル
100 偏光板
200 液晶表示装置
a 試験片を曲げる始点
Claims (5)
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JP2015559987A JPWO2015115501A1 (ja) | 2014-01-30 | 2015-01-28 | 積層体および偏光板 |
CN201580004946.8A CN105916953B (zh) | 2014-01-30 | 2015-01-28 | 叠层体及偏振片 |
KR1020167019376A KR20160114588A (ko) | 2014-01-30 | 2015-01-28 | 적층체 및 편광판 |
US15/112,929 US20160333234A1 (en) | 2014-01-30 | 2015-01-28 | Laminate and polarizing plate |
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JP2014-016161 | 2014-01-30 | ||
JP2014016161 | 2014-01-30 |
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WO2015115501A1 true WO2015115501A1 (ja) | 2015-08-06 |
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US (1) | US20160333234A1 (ja) |
JP (1) | JPWO2015115501A1 (ja) |
KR (1) | KR20160114588A (ja) |
CN (1) | CN105916953B (ja) |
TW (1) | TWI701140B (ja) |
WO (1) | WO2015115501A1 (ja) |
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WO2018079627A1 (ja) * | 2016-10-31 | 2018-05-03 | 日本ゼオン株式会社 | 光学フィルム、製造方法、及び多層フィルム |
JP7024725B2 (ja) * | 2016-11-30 | 2022-02-24 | 日本ゼオン株式会社 | 光学積層体、円偏光板、タッチパネル及び画像表示装置 |
Citations (4)
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JP2008058599A (ja) * | 2006-08-31 | 2008-03-13 | Sumitomo Chemical Co Ltd | 複合偏光板製品チップの製造方法 |
WO2009025360A1 (ja) * | 2007-08-22 | 2009-02-26 | Sumitomo Chemical Company, Limited | 複合偏光板、積層光学部材及びそれらを用いた画像表示装置 |
JP2010224377A (ja) * | 2009-03-25 | 2010-10-07 | Sumitomo Chemical Co Ltd | 複合偏光板及び液晶表示装置 |
JP2010282161A (ja) * | 2009-06-08 | 2010-12-16 | Toyo Ink Mfg Co Ltd | 偏光板及び偏光板形成用接着剤組成物 |
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JP3899511B2 (ja) * | 2001-04-27 | 2007-03-28 | Jsr株式会社 | 熱可塑性ノルボルネン系樹脂系光学用フィルム |
JP4238501B2 (ja) * | 2001-04-27 | 2009-03-18 | Jsr株式会社 | 熱可塑性ノルボルネン系樹脂系光学用フィルム |
JP4461795B2 (ja) | 2003-12-18 | 2010-05-12 | 日本ゼオン株式会社 | 光学積層体、及び光学積層体の製造方法 |
KR20070094825A (ko) * | 2005-01-05 | 2007-09-21 | 제이에스알 가부시끼가이샤 | 열가소성 수지 조성물, 광학 필름 및 필름 제조 방법 |
WO2008145714A2 (en) * | 2007-05-30 | 2008-12-04 | Glaxo Group Limited | Fluid dispenser |
TW201009035A (en) * | 2008-06-30 | 2010-03-01 | Toagosei Co Ltd | Actinic ray curable adhesive composition |
WO2012165201A1 (ja) * | 2011-06-02 | 2012-12-06 | 株式会社きもと | 易剥離性粘着フィルム |
CN103975033B (zh) * | 2011-12-07 | 2016-04-13 | 第一毛织株式会社 | 光固化粘合剂组合物以及包含它的显示装置 |
JP2014139297A (ja) * | 2012-12-21 | 2014-07-31 | Asahi Glass Co Ltd | 粘着層付き透明面材、表示装置およびそれらの製造方法 |
-
2015
- 2015-01-28 KR KR1020167019376A patent/KR20160114588A/ko not_active Application Discontinuation
- 2015-01-28 US US15/112,929 patent/US20160333234A1/en not_active Abandoned
- 2015-01-28 JP JP2015559987A patent/JPWO2015115501A1/ja active Pending
- 2015-01-28 CN CN201580004946.8A patent/CN105916953B/zh not_active Expired - Fee Related
- 2015-01-28 WO PCT/JP2015/052401 patent/WO2015115501A1/ja active Application Filing
- 2015-01-30 TW TW104103147A patent/TWI701140B/zh not_active IP Right Cessation
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JP2008058599A (ja) * | 2006-08-31 | 2008-03-13 | Sumitomo Chemical Co Ltd | 複合偏光板製品チップの製造方法 |
WO2009025360A1 (ja) * | 2007-08-22 | 2009-02-26 | Sumitomo Chemical Company, Limited | 複合偏光板、積層光学部材及びそれらを用いた画像表示装置 |
JP2010224377A (ja) * | 2009-03-25 | 2010-10-07 | Sumitomo Chemical Co Ltd | 複合偏光板及び液晶表示装置 |
JP2010282161A (ja) * | 2009-06-08 | 2010-12-16 | Toyo Ink Mfg Co Ltd | 偏光板及び偏光板形成用接着剤組成物 |
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Publication number | Publication date |
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TW201532820A (zh) | 2015-09-01 |
CN105916953B (zh) | 2019-11-19 |
CN105916953A (zh) | 2016-08-31 |
TWI701140B (zh) | 2020-08-11 |
JPWO2015115501A1 (ja) | 2017-03-23 |
KR20160114588A (ko) | 2016-10-05 |
US20160333234A1 (en) | 2016-11-17 |
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