CN111344612A - Optical laminate, and polarizing lens and ophthalmic wearing article provided with same - Google Patents
Optical laminate, and polarizing lens and ophthalmic wearing article provided with same Download PDFInfo
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- CN111344612A CN111344612A CN201880072890.3A CN201880072890A CN111344612A CN 111344612 A CN111344612 A CN 111344612A CN 201880072890 A CN201880072890 A CN 201880072890A CN 111344612 A CN111344612 A CN 111344612A
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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
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/12—Polarisers
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Health & Medical Sciences (AREA)
- Polarising Elements (AREA)
- Eyeglasses (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides an optical laminate, which is provided with a cholesterol type liquid crystal layer (3) and a polarizing element (7) between a first support (1) and a second support (9); wherein the first support (1) and/or the second support (9) contain a polyamide resin; and, at least one combination selected from the group consisting of the following combinations 1) to 3) is bonded with a solvent-free ultraviolet-curable adhesive: 1) a first support (1) or a second support (9) and a polarizing element (7), 2) a first support (1) or a second support (9) and a cholesteric liquid crystal layer (3), and 3) a cholesteric liquid crystal layer (3) and a polarizing element (7).
Description
Technical Field
The present invention relates to an optical laminate including a cholesteric liquid crystal layer and a polarizing element, and an ophthalmic wearing article (sunglasses, goggles, a visor for a helmet, etc.) using the optical laminate.
Background
In order to reduce the glare caused by reflected light from water, road, snow, and the like, eye wear (sunglasses, goggles, helmet visor, and the like) is used. For example, sunglasses are colored by using a pigment or the like in a lens portion, and the amount of light incident on the eyes is reduced by absorption of the pigment to reduce the degree of glare, and polarized sunglasses are particularly effective for reflected light on water surfaces and snow surfaces.
Since the polarized sunglasses are designed to convert reflected light into polarized light and efficiently absorb light in the polarized light direction, the amount of incident light to the eyes is not greatly reduced, and the visibility can be improved by reducing the glare.
Polarized sunglasses are generally obtained by mounting a polarized lens in a frame, the polarized lens being formed by mounting an optical laminate in which a polarizing element is sandwiched by a support such as polycarbonate in a mold, and processing a lens base material layer into a desired shape by injection molding (patent document 1). The polarizing element is a thin film in which a so-called dichroic dye such as a dichroic dye and a polyiodide-polyvinyl alcohol (PVA) complex is uniaxially aligned together with a polymer such as PVA, and various colors of polarizing elements can be obtained depending on the color of the dye used.
In order to provide design properties or further improve visibility, a multilayer film may be deposited on the surface of the polarized sunglasses. By providing the multilayer film, reflected light on the surface of sunglasses, which can be viewed by other people, is in a metal-tone color of blue, green or red, and a wearer can reduce dazzling degree by reflecting specific light, and meanwhile, the visibility of scenery is further improved. The provision of such a multilayer film is advantageous for the wearer, but on the other hand, there are problems in handling that sebum and the like are not easily removed when adhering to the multilayer film, and there is a problem that the multilayer film peels off when exposed to moisture and sea wind at seashore and the like.
To solve such a problem, a method of providing a multilayer film on the inner side of the support (that is, between the polarizer and the support) is conceivable, but since the multilayer film exhibits reflection performance due to a difference in refractive index between layers, it is difficult to obtain reflection performance equivalent to that of an air interface on the outer side. Further, since the multilayer film is made of an inorganic substance, there is a problem in bonding with a polarizing element which is an organic substance.
On the other hand, as a method for imparting a metallic color tone using an organic substance without using a multilayer film, there is a method using a cholesteric liquid crystal layer (patent document 2). In the cholesteric liquid crystal, liquid crystal molecules are spirally aligned, and a function of selectively reflecting a circularly polarized light component in the same direction as the spiral direction of a specific wavelength region according to the length of the spiral pitch is provided. When a cholesteric liquid crystal layer in which the helical alignment is fixed in a state of a desired reflection wavelength region is used as the optical laminate, the optical laminate can have a vivid color tone and can provide decorativeness.
Polycarbonate is generally used for a lens base material layer of a polarizing lens in terms of high transparency, colorlessness, high impact resistance, high heat resistance, and the like (patent document 3).
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent application laid-open No. 2010-39220
[ patent document 2] Japanese patent application laid-open No. 2001-180200
[ patent document 3] International publication No. 2016/002582.
Disclosure of Invention
[ problems to be solved by the invention ]
However, in patent document 3, since the heat distortion temperature of polycarbonate is as high as 130 to 140 ℃, there is a problem in processability at the time of molding. In addition, in the polarizing lens using polycarbonate, a problem of whitening of a frame portion in contact with the polarizing lens due to the influence of exhaust gas generated by heating occurs, and the material of the frame is limited. Further, when a thermosetting adhesive is used for bonding a cholesteric liquid crystal layer and a polycarbonate resin, sufficient bonding strength may not be obtained.
The purpose of the present invention is to provide an optical laminate which has good processability during molding in an ophthalmic wearing article such as polarized sunglasses having a cholesteric liquid crystal layer, is lightweight, has high productivity, and can suppress frame whitening, and an ophthalmic wearing article using the optical laminate.
[ means for solving the problems ]
The present inventors have intensively studied and found an optical laminate comprising a cholesteric liquid crystal layer and a polarizing element between a first support and a second support; wherein the first support and/or the second support contain a polyamide resin; further, at least one combination selected from the group consisting of the following combinations 1) to 3) is bonded with a solvent-free ultraviolet-curable adhesive, 1) the first support or the second support and the polarizing element, 2) the first support or the second support and the cholesteric liquid crystal layer, and 3) the cholesteric liquid crystal layer and the polarizing element. The above problems can be solved by the optical layered body, and the present invention has been completed.
That is, the present invention relates to the following:
(1) an optical laminate comprising a cholesteric liquid crystal layer and a polarizing element between a first support and a second support; wherein the content of the first and second substances,
the first support and/or the second support contain a polyamide resin;
and, at least one combination selected from the group consisting of the following 1) to 3) is bonded with a solvent-free ultraviolet-curable adhesive: 1) a first support or a second support and a polarizing element, 2) a first support or a second support and a cholesteric liquid crystal layer, and 3) a cholesteric liquid crystal layer and a polarizing element.
(2) The optical laminate according to the item (1), wherein the polyamide resin has an aliphatic skeleton of nylon.
(3) The optical laminate according to the item (1) or (2), wherein the solvent-free ultraviolet-curable adhesive contains urethane (meth) acrylate.
(4) A polarized lens obtained by injection molding of a lens base material onto the optical laminate according to any one of the above (1) to (3).
(5) The polarizing lens according to the item (4), wherein the lens base material comprises a polyamide resin.
(6) The polarizing lens according to the item (5), wherein the polyamide resin contained in the lens base material is nylon having an aliphatic skeleton.
(7) An ophthalmic wearing article comprising the polarizing lens according to any one of the above (4) to (6) incorporated in a frame.
[ Effect of the invention ]
The optical laminate of the present invention is excellent in processability in molding, light in weight, and high in productivity when used in an ophthalmic wearing article such as polarizing sunglasses, and can suppress frame whitening.
Drawings
Fig. 1 is an explanatory view showing an optical laminate of the present invention.
Fig. 2 is an explanatory view showing an optical layered body according to another embodiment of the present invention.
Detailed Description
The optical laminate of the present invention includes a cholesteric liquid crystal layer having a function as a light reflecting layer. The cholesteric liquid crystal layer includes: nematic Liquid Crystal (Nematic Liquid Crystal) having chirality (chirality), or a formulation in which a chiral agent (chiral agent) is added to the Nematic Liquid Crystal. The method of adding a chiral agent to a nematic liquid crystal to obtain a cholesteric liquid crystal layer is preferable because the helical direction and the reflection wavelength can be arbitrarily designed according to the type and amount of the chiral agent. The nematic liquid crystal layer used in the present invention is preferably a nematic liquid crystal monomer having a polymerizable group because the liquid crystal layer is used in a state of a helical alignment and is fixed, unlike a liquid crystal layer which operates in an electric field.
In the method for producing the cholesteric liquid crystal layer used in the present invention, for example, a necessary amount of a dextrorotatory or levorotatory chiral agent is added to a nematic liquid crystal monomer having a polymerizable group so as to reflect a desired wavelength. Next, these are dissolved in a solvent, and a photopolymerization initiator is added. Then, the solution is coated on a plastic substrate such as a PET film to have a uniform thickness as much as possible, and the solvent is removed by heating to form cholesteric liquid crystals on the substrate, and the cholesteric liquid crystals are left for a certain period of time under a temperature condition that the cholesteric liquid crystals are aligned at a desired helical pitch. Then, while maintaining the alignment, the alignment is fixed by irradiating ultraviolet rays with a high-pressure mercury lamp or the like, thereby obtaining a cholesteric liquid crystal layer used in the present invention.
The cholesteric liquid crystal layer used in the present invention may be used by stacking 2 or 3 or more layers, or may be used as a single layer. For example, when 2 layers are stacked for use, a right-handed cholesteric liquid crystal layer and a left-handed cholesteric liquid crystal layer are preferably stacked for maintaining high polarization degree.
The method of lamination is not particularly limited, and lamination using an adhesive or a bonding agent is preferable. The adhesive includes acrylic and rubber adhesives, and an acrylic adhesive whose adhesiveness, holding force, and the like can be easily adjusted is preferable. Examples of the adhesive include an ultraviolet-curable adhesive and a heat-curable adhesive. In the case of an ultraviolet-curable adhesive, the adhesive can be cured by irradiating a composition obtained by mixing a plurality of monomers having an acryloyl group or an epoxy group with ultraviolet light in the presence of a photopolymerization initiator. In the case of a thermosetting adhesive, a composition obtained by mixing a plurality of epoxy group-containing monomers is heated in the presence of an acid catalyst to cure and bond the epoxy group-containing monomers. An ultraviolet-curable adhesive is preferable from the viewpoint of curing in a short time and high productivity.
The polarizing element used in the present invention is typically a PVA polarizing film. The production method is not particularly limited, and the film is produced by uniaxially stretching and aligning a polymer film containing polyvinyl alcohol or a derivative thereof to which a dye such as iodine or a dichroic dye is adsorbed. As the coloring matter, a dichroic dye is preferable from the viewpoint of heat resistance, and particularly a direct dye containing an azo coloring matter having a sulfonic acid group is preferable.
The optical laminate of the present invention includes a first support and a second support. The first support and/or the second support contain a polyamide resin. Polyamide resins have less optical anisotropy and suppressed birefringence compared to polycarbonate resins, and also have excellent solvent resistance. Further, since the composition has a low specific gravity, is lightweight, and has a low heat distortion temperature, it has good processability during molding. When nylon is used as the injection molding resin, it is preferable to use the same material for the injection molding resin of the lens base layer and the support of the optical laminate in order to prevent deterioration of the appearance due to the difference in refractive index and to ensure adhesion, and in this respect, it is also preferable to use a polyamide resin. Further, when a polyamide resin is used, since the frame whitening phenomenon due to the influence of exhaust gas generated by heating can be suppressed, it is also preferable from the viewpoint of no limitation on the frame material as described later.
Examples of the polyamide resin include nylon having an aliphatic skeleton and polyaramide composed only of an aromatic skeleton. Examples of the nylon include nylon 6, nylon 11, nylon 12, and nylon 66. The polyaramid includes para (para) polyaramid and meta (meta) polyaramid.
When only the first support or the second support contains a polyamide resin, the other support is preferably a polycarbonate resin or a cellulose triacetate resin.
In the present invention, a solvent-free ultraviolet-curable adhesive is used when bonding the support and the polarizing element, the support and the cholesteric liquid crystal layer, and the cholesteric liquid crystal layer and the polarizing element. When a solvent-based adhesive is used, there is a problem that the surface of the base material is corroded and the adhesive strength is reduced, but by using a solventless adhesive, damage to the film can be suppressed. In the case of an ultraviolet-curable adhesive, a composition obtained by mixing a plurality of monomers having an acryloyl group or an epoxy group can be cured by irradiation with ultraviolet light in the presence of a photopolymerization initiator, and the adhesive can be bonded. An ultraviolet-curable adhesive is preferable from the viewpoint of curing in a short time and high productivity.
It is preferable to use a solventless ultraviolet curing adhesive for all the adhesive layers.
Examples of the solvent-free ultraviolet-curable adhesive used in the present invention include adhesives using a photo radical polymerization reaction such as a (meth) acrylate adhesive, an ene/thiol adhesive, and an unsaturated polyester adhesive, and adhesives using a photo cation polymerization reaction such as an epoxy adhesive, an oxetane adhesive, an epoxy/oxetane adhesive, and a vinyl ether adhesive, and these adhesives may be used alone or in combination. From the viewpoint of satisfactory transparency and weather resistance, a (meth) acrylate-based adhesive is particularly preferable. The (meth) acrylate adhesive contains "a monomer or oligomer having 1 or more (meth) acryloyl groups in a molecule" and "a photopolymerization initiator" as essential components. The (meth) acrylate-based adhesive may contain additives and the like as needed. The oligomer having 1 or more (meth) acryloyl groups in the molecule includes, for example, epoxy (meth) acrylate, polyester (meth) acrylate, and urethane (meth) acrylate, with urethane (meth) acrylate being particularly preferred.
In adjusting the viscosity of the ultraviolet-curable adhesive, various solvents capable of sufficiently dissolving the adhesive may be used, but since there is a problem that the adhesive will corrode the surface of the substrate and the adhesive force will be reduced, it is preferable to use a reactive diluent (for example, a monofunctional acrylic monomer). Examples of the monofunctional acrylic monomer include isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, methoxytriethylene glycol (meth) acrylate, and (meth) acrylate which is an alkylene oxide-modified product of a phenol derivative, 2-ethylhexyl carbitol (meth) acrylate, ethoxyethoxyethyl (meth) acrylate, tricyclodecane (meth) acrylate, dicycloalkenyl (meth) acrylate, isobornyl (meth) acrylate, adamantyl (meth) acrylate, benzyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, and ethoxylated (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, N- (meth) acryloyloxyethylhexahydrophthalimide, ω -carbonylpolycaprolactone (meth) acrylate, monohydroxyhexyl (meth) acrylate phthalate, dimer (meth) acrylate, and the like.
The ultraviolet-curable adhesive is cured by irradiation with ultraviolet light. The ultraviolet rays used can be of various types. The light source of the ultraviolet ray is not particularly limited, and for example, sunlight, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, and the like can be used, and among these, a high-pressure mercury lamp and a metal halide lamp are preferable from the viewpoint of low cost and excellent versatility.
The optical laminate of the present invention can be obtained by sandwiching the cholesteric liquid crystal layer and the polarizing element with a support and an adhesive layer or the like therebetween.
Fig. 2 shows an example of a configuration diagram of the present invention. The cholesteric liquid crystal layers 3 and 5 and the polarizer 7 laminated via the adhesive layers 4 and 6 are sandwiched between the adhesive layers 2 and 8 by the supports 1 and 9, and the optical laminate 10 of the present invention is obtained. The polarizing lens 11 is obtained by injection molding the lens base material layer 12 on the optical laminate 10 of the present invention.
The lens base material is not particularly limited, and for example: thermoplastic resins which can be molded by injection molding, thermosetting resins which can be molded by cast polymerization and the like and are generally used for lenses for ophthalmic wearing articles, and the like. Examples thereof include: (meth) acrylic resins such as methyl methacrylate homopolymer and copolymers of methyl methacrylate and 1 or more other monomers; diethylene glycol bisallylcarbonate-based resins such as a homopolymer of diethylene glycol bisallylcarbonate, and a copolymer of diethylene glycol bisallylcarbonate and 1 or more kinds of other monomers; acrylonitrile-styrene copolymers; a halogen-containing copolymer; polythioether resins such as homopolymers of a monomer having a sulfide bond, and copolymers of a monomer having a sulfide bond and 1 or more other monomers; a polyurea resin; a polyamide resin; a polycarbonate resin; a polystyrene resin; a polyolefin resin; a polyvinyl chloride resin; a polyester resin; polyethylene terephthalate; polyurethane (polyurethane) resins; sulfur-containing urethane resins such as polythiourethane (polythiourethane) resins; epoxy resins, and the like. From the viewpoint of adhesion to the optical laminate, the same material as the layer in contact therewith is preferable.
By using the optical laminate of the present invention, an ophthalmic wearing article (sunglasses, goggles, visor for helmet, etc.) using the optical laminate of the present invention can be obtained by molding the cholesteric liquid crystal layer into a desired shape so as to be on the outer side and fixing the same to a frame.
For example, in the case of sunglasses, the optical layered body is die-cut into a desired shape, and then bent. The method of bending is not particularly limited as long as the bending is performed through a step capable of imparting a shape to a spherical surface or an aspherical surface according to the purpose. The resin may be further injected into the bent product. In this case, there is an advantage that the optical layered body is free from unevenness in thickness, and even a lens having no focal refractive power can be used for a product having particularly excellent impact resistance and appearance and causing no visual fatigue.
A hard coat layer, an antireflection film, etc. are appropriately formed on the surface, and then the film is fixed to the frame by edging, boring, screwing, etc., thereby forming sunglasses.
Examples of the material of the frame include synthetic resin materials such as celluloid (celluloid), acetate, and polyamide, and natural materials such as tortoise shell (tortoishell). When a nylon resin having an aliphatic skeleton is used for a polarizing lens formed by injection molding, the polarizing lens can be suitably used without causing problems such as whitening even when combined with a cellulose-based frame.
[ examples ]
The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to these examples.
[ example 1]
< production of cholesteric liquid Crystal layer >
A dextrorotatory cholesteric liquid crystal layer was produced according to the following procedure using a coating solution prepared from 40g of a polymerizable liquid crystal monomer (trade name: LC242, manufactured by BASF corporation), 3g of a chiral agent (trade name: LC756, manufactured by BASF corporation) and 2g of a photopolymerization initiator (trade name: IRGACUREPOTO, manufactured by BASF corporation). A levorotatory cholesteric liquid crystal layer was produced by following the same procedure using a coating solution prepared from 40g of a polymerizable liquid crystal monomer (trade name: LC242, manufactured by BASF corporation), 9g of a chiral agent (trade name: S1080, manufactured by Merck corporation) and 2g of a photopolymerization initiator (trade name: IRGACUREPO, manufactured by BASF corporation). A PET film (manufactured by toyo textile co., ltd., no easy-bonding layer) was used as the plastic substrate.
(1) The coating liquid was applied to a PET film at room temperature using a wire bar so that the film thickness after drying became 4 μm.
(2) The solvent was removed by heating at 150 ℃ for 5 minutes. Next, a high pressure mercury lamp (manufactured by HANSON TOYOTHI LIGHT Co., Ltd.) was UV-irradiated for 5 to 10 seconds at an output of 120W to obtain a cholesteric liquid crystal layer.
(3) The PET film was peeled off.
The cholesteric liquid crystal layer used in the present invention is obtained by the above-described process.
< production of polarizing element >
Polyvinyl alcohol (manufactured by Kuraray Ltd., trade name: Kuraray Vinylon #750) was stained at 35 ℃ for 3 minutes in an aqueous solution containing Chlorantine Fast Red (C.I.28160)0.25g/L, direct yellow (C.I.24895)0.18g/L, Cyranine Blue 4GL (Solophenyl Blue 4GL) (C.I.34200)1.0g/L, and sodium sulfate 10g/L, and then extended to 4-fold in the solution. Subsequently, the dyed sheet was immersed in an aqueous solution containing 2.5 g/L of nickel acetate and 6.6g/L of boric acid at 35 ℃ for 3 minutes. Then, the sheet was dried at room temperature for 3 minutes while being kept in a stretched state, and then heat-treated at 70 ℃ for 3 minutes to obtain a polarizing element. The degree of polarization of the polarizing element was measured by the absolute polarization method using a spectrophotometer, and as a result, the degree of polarization was 99.5%.
< production of optical layered body >
Urethane acrylate (trade name: UX-4101, manufactured by Nippon chemical Co., Ltd.) 6g, 4-hydroxybutyl acrylate (trade name: 4-HBA, manufactured by Osaka organic chemical industries, Ltd.) 25g, tetrahydrofurfuryl acrylate (trade name: VISCOTE #150, manufactured by Osaka organic chemical industries, Ltd.) 20g, isoborneol acrylate (trade name: IBXA, manufactured by Osaka organic chemical industries, Ltd.) 10g, a solvent-free ultraviolet-curable adhesive was prepared by mixing 30g of bisphenol A type epoxy resin (product name: RE-310S, manufactured by Nippon chemical Co., Ltd.), 3g of photopolymerization initiator (product name: DETX-S, manufactured by Nippon chemical Co., Ltd.), 0.1g of photopolymerization initiator (product name: UVS-1331, manufactured by Kawasaki chemical Co., Ltd.), and 5g of photopolymerization initiator (product name: IRGACURE270, manufactured by BASF Co., Ltd.). The cholesteric liquid crystal layer was bonded to a polarizer with the adhesive, and then the resultant was irradiated with 146mW/cm of light using a high-pressure mercury lamp2Cumulative light quantity 866mJ/cm2Irradiating ultraviolet rays under the conditions of (1) to obtain a cured product. Further, via the bonding agentThe optical laminate of the present invention was obtained by irradiating a polyamide resin support (product name: Grilamid TR-90, manufactured by EMS) having a thickness of about 0.2mm with ultraviolet rays.
The optical laminate thus obtained was punched out into a strip shape using a die having a diameter of 79.5mm and a width of 55mm in the vertical direction, and was subjected to bending at a low temperature of 110 ℃ using a die having a base curve (base curve) of 7.95 (curvature radius of 66.67mm), so that the cholesteric liquid crystal layer side became a convex surface. The optical laminate has good processability and good bonding properties, and does not peel off even when immersed in water at 80 ℃ for 1 day.
[ example 2]
< production of polarized sunglasses >
The optical laminate bent in example 1 was inserted into a mold for injection molding, and the molten transparent nylon was injection molded on the concave side to obtain a polarizing lens. Then, the frame is matched and the edge is polished, and the polarized lens is embedded into the cellulose frame, so as to manufacture the polarized sunglasses.
The produced polarized sunglasses were excellent in adhesion between the polyamide support and the transparent nylon and did not peel off even when immersed in water at 80 ℃ for 1 day. Moreover, frame whitening was not confirmed.
Comparative example 1
Polarizing sunglasses for comparison were produced by following the same procedures as in examples 1 and 2, except that a polycarbonate support (bisphenol a type aromatic polycarbonate manufactured by mitsubishi gas chemical corporation) having a thickness of 0.3mm was used as the support.
The optical laminate thus produced had poor processability at a low temperature of 110 ℃, and could not be sufficiently bent to cause cracks.
In the produced polarized sunglasses, the polycarbonate support and the transparent nylon were poor in adhesion, and peeling was observed at the end portions when immersed in water at 80 ℃ for 1 day. In addition, whitening was observed in the contact portion when the film was combined with the cellulose-based frame.
Comparative example 2
An optical laminate for comparison was produced by following the same procedure as in example 1 except that 6g of polyvinyl alcohol (trade name: Gohsenex Z200, manufactured by Nippon synthetic chemical industries, Ltd.), 1.5g of a curing agent (trade name: SPM-01, manufactured by Nippon synthetic chemical industries, Ltd.) and 100g of pure water were mixed as an adhesive to prepare a thermosetting adhesive, and the mixture was cured by heat treatment at 80 ℃ for 10 minutes.
The optical laminate thus produced had poor adhesion, and delamination was observed when the laminate was immersed in water at 80 ℃ for 1 day.
Comparative example 3
An optical laminate for comparison was produced by following the same procedure as in comparative example 2, except that a polycarbonate support (bisphenol a type aromatic polycarbonate manufactured by mitsubishi gas chemical corporation) having a thickness of 0.3mm was used as the support.
The optical laminate thus produced had poor processability at a low temperature of 110 ℃, and could not be sufficiently bent to cause cracks. Further, the adhesiveness was poor, and delamination was observed when the sheet was immersed in water at 80 ℃ for 1 day.
Comparative example 4
Except that "6 g of urethane acrylate (trade name: UX-4101, manufactured by Nippon Kagaku Co., Ltd.), 25g of monofunctional acrylate (trade name: 4-HBA, manufactured by Osaka organic chemical industries, Ltd.), 30g of epoxy resin (trade name: RE-310S, manufactured by Nippon Kagaku Co., Ltd.), 3g of photopolymerization initiator (trade name: DETX-S, manufactured by Nippon Kagaku Co., Ltd.), 0.1g of photopolymerization initiator (trade name: UVS-1331, manufactured by Kawasaki chemical industries, Ltd.), 5g of photopolymerization initiator (trade name: IRGACURE270, manufactured by BASF Co., Ltd.), and 40g of solvent (trade name: methyl ethyl ketone, manufactured by Nakazaki chemical industries, Ltd.) were mixed to prepare a solvent-based ultraviolet-curing type adhesive, which was heated at 80 ℃ for 3 minutes, using a high pressure mercury lamp and at an illuminance of 146mW/cm2Cumulative light quantity 866mJ/cm2An optical laminate for comparison was produced by following the same procedure as in example 1 except that the optical laminate was cured by irradiation with ultraviolet rays under the conditions of (1).
The optical laminate thus produced had poor adhesion, and delamination was observed when the laminate was immersed in water at 80 ℃ for 1 day. In addition, whitening was observed due to base material erosion by the solvent.
Description of the reference numerals
1 first support
2 bonding agent layer
3 cholesterol type liquid crystal layer
4 bonding agent layer
5 cholesterol type liquid crystal layer
6 bonding agent layer
7 polarizing element
8 bonding agent layer
9 second support
10 optical laminate
11 polarized lens
12 lens substrate.
Claims (7)
1. An optical laminate comprising a cholesteric liquid crystal layer and a polarizing element between a first support and a second support; wherein the content of the first and second substances,
the first support and/or the second support contain a polyamide resin;
and, at least one combination selected from the group consisting of the following combinations 1) to 3) is bonded with a solvent-free ultraviolet-curable adhesive, 1) the first support or the second support and the polarizing element, 2) the first support or the second support and the cholesteric liquid crystal layer, and 3) the cholesteric liquid crystal layer and the polarizing element.
2. The optical laminate according to claim 1, wherein the polyamide resin is a nylon having an aliphatic skeleton.
3. The optical laminate according to claim 1 or 2, wherein the solvent-free ultraviolet-curable adhesive contains urethane (meth) acrylate.
4. A polarized lens obtained by injection molding of the optical laminate according to any one of claims 1 to 3, wherein the lens base material is a lens.
5. The optical laminate according to claim 4, wherein the lens base material comprises a polyamide resin.
6. The optical laminate according to claim 5, wherein the polyamide resin contained in the lens base material is nylon having an aliphatic skeleton.
7. An ophthalmic wearing article in which the polarizing lens according to any one of claims 4 to 6 is incorporated in a frame.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017238311 | 2017-12-13 | ||
| JP2017-238311 | 2017-12-13 | ||
| PCT/JP2018/040369 WO2019116760A1 (en) | 2017-12-13 | 2018-10-30 | Optical laminate, and polarizing lens and eye wear each equipped with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111344612A true CN111344612A (en) | 2020-06-26 |
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| CN201880072890.3A Pending CN111344612A (en) | 2017-12-13 | 2018-10-30 | Optical laminate, and polarizing lens and ophthalmic wearing article provided with same |
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| Country | Link |
|---|---|
| JP (1) | JPWO2019116760A1 (en) |
| CN (1) | CN111344612A (en) |
| TW (1) | TW201927572A (en) |
| WO (1) | WO2019116760A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427846A (en) * | 2020-04-07 | 2022-12-02 | 日本化药株式会社 | Optical film, and optical laminate and goggles having the same |
| JPWO2022196784A1 (en) | 2021-03-18 | 2022-09-22 | ||
| WO2023112533A1 (en) * | 2021-12-17 | 2023-06-22 | 三菱瓦斯化学株式会社 | Polarizing sheet |
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- 2018-10-30 JP JP2019558958A patent/JPWO2019116760A1/en active Pending
- 2018-10-30 WO PCT/JP2018/040369 patent/WO2019116760A1/en active Application Filing
- 2018-10-30 CN CN201880072890.3A patent/CN111344612A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019116760A1 (en) | 2019-06-20 |
| JPWO2019116760A1 (en) | 2020-12-17 |
| TW201927572A (en) | 2019-07-16 |
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