WO2021187600A1 - 光学性積層体および移動体 - Google Patents

光学性積層体および移動体 Download PDF

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Publication number
WO2021187600A1
WO2021187600A1 PCT/JP2021/011229 JP2021011229W WO2021187600A1 WO 2021187600 A1 WO2021187600 A1 WO 2021187600A1 JP 2021011229 W JP2021011229 W JP 2021011229W WO 2021187600 A1 WO2021187600 A1 WO 2021187600A1
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layer
less
optical laminate
light
wavelength
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PCT/JP2021/011229
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English (en)
French (fr)
Japanese (ja)
Inventor
雄一朗 船越
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住友ベークライト株式会社
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Priority to JP2022508443A priority Critical patent/JPWO2021187600A1/ja
Publication of WO2021187600A1 publication Critical patent/WO2021187600A1/ja

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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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters

Definitions

  • the present invention relates to an optical laminate and a moving body.
  • a molded product molded using a resin composition containing a permeable resin material as a main material is lightweight and has excellent moldability, and in particular, a molded product using polycarbonate as a main material is transparent. It is also good and has excellent impact resistance compared to glass products. Therefore, such molded bodies are often used for various lamp lenses, window materials, covers for instruments, windshields, and the like.
  • the optical laminate to which the light absorber is added mainly exhibits black color, and the optical laminate using the reflection mechanism is limited to a metallic luster color tone.
  • the cover material lacks design compatibility with the exterior of the sensor or the camera. As a result, it was difficult to improve the design of the sensor and camera.
  • An object of the present invention is to provide an optical laminate with improved design compatibility with the exterior of a sensor unit and a moving body with improved design.
  • a second layer laminated on the first layer and containing a polycarbonate as a main agent and a fluorescent coloring material is provided.
  • the fluorescent color material is excited by excitation light having a first peak of excitation wavelength intensity in a wavelength region of 200 nm or more and 780 nm or less, and emits light having a second peak of fluorescence wavelength intensity in a wavelength region of 380 nm or more and 780 nm or less.
  • An optical laminate characterized by being configured to emit light.
  • the fluorescent coloring material is at least one selected from the group consisting of anthraquinone dyes, perylene dyes, quinoline dyes, heterocyclic dyes, benzoxazole derivatives and naphthalene dyes in (1) above.
  • the optical laminate according to the description.
  • optical laminate according to any one of (1) to (5) above which is configured to be used as a cover member for covering a light emitting / receiving portion of an infrared sensor.
  • FIG. 1 is a vertical cross-sectional view showing a first embodiment of the optical laminate of the present invention.
  • FIG. 2 is a vertical sectional view showing a second embodiment of the optical laminate of the present invention.
  • FIG. 3 is a vertical sectional view showing a third embodiment of the optical laminate of the present invention.
  • FIG. 4 is a diagram showing an example of a spectrum having a first peak of an excitation wavelength.
  • FIG. 5 is a diagram showing an example of a spectrum having a second peak of the fluorescence wavelength.
  • FIG. 1 is a vertical cross-sectional view showing a first embodiment of the optical laminate of the present invention.
  • the upper side of FIG. 1 is referred to as “upper” and the lower side is referred to as “lower”.
  • the optical laminate 10 (optical film) is applied to a cover member or the like that covers a light emitting / receiving portion of an infrared sensor.
  • the optical laminate 10 is laminated on the first layer 1 (base material layer) and the first layer 1 and emits fluorescent light, as shown in FIG. 1, the second layer 2 (fluorescent layer). ) And.
  • the optical laminate 10 When the optical laminate 10 is applied to the cover member, the optical laminate 10 is installed so that the second layer 2 faces the outside and the first layer 1 is the object side to be covered. Will be done.
  • the second layer 2 can be provided with a function as a protective layer that protects the first layer 1.
  • the optical laminate of the present invention has a first layer (base material layer) containing a polycarbonate as a main agent and a visible light absorber that absorbs visible light, and a polycarbonate as a main agent that is laminated on the first layer.
  • the fluorescent color material includes a second layer (fluorescent layer) including the fluorescent color material, and the fluorescent color material has a first peak of the intensity of the excitation wavelength in the wavelength range of 200 nm or more and 780 nm or less (ultraviolet light to visible light). It is characterized in that it is excited by the excitation light and is configured to emit emitted light having a second peak of the intensity of the fluorescence wavelength in the wavelength range of 380 nm or more and 780 nm or less (visible light).
  • the optical laminate of the present invention can emit fluorescent light by providing a second layer (fluorescent layer) containing a fluorescent coloring material.
  • a second layer fluorescent layer
  • the optical laminate can improve the design compatibility with the exterior of the sensor unit.
  • the first layer contains polycarbonate as a main agent and a visible light absorber that absorbs visible light.
  • ultraviolet light to visible light refers to an electromagnetic wave having a wavelength of 200 nm or more and 780 nm or less.
  • the first layer (base material layer) 1 is a resin composition containing polycarbonate as a main agent (main material) having translucency and a visible light absorber that is dissolved and dispersed in the polycarbonate and absorbs visible light. It is a molded body molded into a layer using. By containing a visible light absorber in the resin composition, it is possible to accurately suppress or prevent the transmission of visible light in a specific wavelength region. As a result, the first layer 1 can have a function of allowing the transmission of light having a desired wavelength region.
  • the optical laminate 10 When the optical laminate 10 includes the first layer 1, the optical laminate 10 exhibits a light blocking property that blocks light in a specific wavelength region, so that light having a desired wavelength region is transmitted. Demonstrate light transmission. Therefore, the optical laminate 10 can be used as a cover member that allows the transmission of light having a desired color tone.
  • Polycarbonate Polycarbonate (polycarbonate-based resin) is contained as a main agent (base resin) of the first layer 1, and is used for molding the first layer 1 into a substrate shape.
  • This polycarbonate is rich in mechanical strength such as transparency (translucency), rigidity, and impact resistance. Therefore, by using polycarbonate as the main agent of the first layer 1, the optical laminate 10 can have excellent transparency and mechanical strength. Further, since polycarbonate has a specific gravity of about 1.2 and is classified as a light one among known resin materials, the weight of the optical laminate 10 can be reduced.
  • polycarbonate various types of polycarbonate can be used, and examples thereof include bisphenol-type polycarbonate and isosorbide-derived polycarbonate produced using plant-derived isosorbide as a main component. Among them, bisphenol-type polycarbonate can be used. preferable.
  • the bisphenol type polycarbonate has a benzene ring in its main chain, whereby the optical laminate 10 can have a higher strength.
  • This bisphenol type polycarbonate is synthesized by, for example, an interfacial polycondensation reaction between bisphenol and phosgene, a transesterification reaction between bisphenol and diphenyl carbonate, and the like.
  • bisphenol examples include bisphenol A and bisphenol (modified bisphenol) which is the origin of the repeating unit of polycarbonate represented by the following formula (A).
  • X is an alkyl group having 1 to 18 carbon atoms, an aromatic group or a cyclic aliphatic group, and Ra and Rb are independently alkyl groups having 1 to 12 carbon atoms.
  • M and n are integers from 0 to 4, respectively, and p is the number of repeating units.
  • the content of the polycarbonate in the optical laminate 10 is not particularly limited, but is preferably 75 wt% or more, and more preferably 85 wt% or more. By setting the content of the polycarbonate within the above range, the optical laminate 10 can exhibit excellent strength.
  • the visible light absorber has a function of suppressing or preventing the transmission of visible light in a specific wavelength region.
  • Such a visible light absorber is not particularly limited, but for example, a first light absorber that absorbs light having a wavelength of 300 nm or more and 550 nm or less, and a second light absorber that absorbs light having a wavelength of 450 nm or more and 800 nm or less.
  • a third light absorber that absorbs light having a wavelength of 400 nm or more and 800 nm or less can be mentioned. Further, these can be used in combination, and further, by appropriately setting the content thereof, the first layer 1 can be surely provided with a function of allowing the transmission of light having a desired wavelength region. .. Therefore, the optical laminate 10 (cover member) exhibits light transmission that transmits light having a desired wavelength region.
  • the first light absorber has an absorption wavelength characteristic of absorbing light having a wavelength of 300 nm or more and 550 nm or less.
  • Examples of the first light absorber include quinoline pigments.
  • Examples of the quinoline pigment include 2-methylquinoline, 3-methylquinoline, 4-methylquinoline, 6-methylquinoline, 7-methylquinoline, 8-methylquinoline, 6-isopropylquinoline, and 2,4-dimethylquinoline.
  • Alkyl substituted quinoline compounds such as 2,6-dimethylquinoline and 4,6,8-trimethylquinoline, 2-aminoquinoline, 3-aminoquinoline, 5-aminoquinoline, 6-aminoquinoline, 8-aminoquinoline, 6-amino Amino group substituted quinoline compounds such as -2-methylquinoline, alkoxy group substituted quinoline compounds such as 6-methoxy-2-methylquinoline, 6,8-dimethoxy-4-methylquinoline, 6-chloroquinoline, 4,7-dichloro Examples thereof include halogen group-substituted quinoline compounds such as quinoline, 3-bromoquinoline, and 7-chloro-2-methylquinoline, and one or a combination of two or more of these can be
  • a first light absorber as a visible light absorber, it is possible to reliably absorb the light having a wavelength of 300 nm or more and 550 nm or less in the first layer 1 among the light incident on the first layer 1. can.
  • the content of the first light absorber in the first layer 1 is not particularly limited, but is preferably 0.001 wt% or more and 10 wt% or less, and is preferably 0.002 wt% or more and 1.0 wt% or less. More preferably, it is 0.005 wt% or more and 0.3 wt% or less.
  • the content of the first light absorber in the first layer 1 is less than the lower limit, visible light of the first layer 1 (light having a wavelength of 300 nm or more and 550 nm or less) depending on the type of the first light absorber. Absorption may decrease.
  • the content of the first light absorber in the first layer 1 exceeds the upper limit value, the absorption of visible light (light having a wavelength of 300 nm or more and 550 nm or less) is not improved, and the first layer 1 is not improved.
  • the adhesion of the 1st layer 1 to the 2nd layer 2 may be impaired.
  • the second light absorber has an absorption wavelength characteristic that absorbs light having a wavelength of 450 nm or more and 800 nm or less.
  • Examples of the second light absorber include anthraquinone-based dyes.
  • anthraquinone dye examples include (1) 2-anilino-1,3,4-trifluoroanthraquinone, (2) 2- (o-ethoxycarbonylanilino) -1,3,4-trifluoroanthraquinone, ( 3) 2- (p-ethoxycarbonylanilinone) -1,3,4-trifluoroanthraquinone, (4) 2- (m-ethoxycarbonylanilinone) -1,3,4-trifluoroanthraquinone, (5) 2- (o-cyanoanilinone) -1,3,4-trifluoroanthraquinone, (6) 2- (p-cyanoanilinone) -1,3,4-trifluoroanthraquinone, (7) 2- (m-cyanoanilinone)- 1,3,4-trifluoroanthraquinone, (8) 2- (o-nitroanilino) -1,3,4-trifluoroanthra
  • a second light absorber as a visible light absorber, it is possible to reliably absorb the light having a wavelength of 450 nm or more and 800 nm or less in the first layer 1 among the light incident on the first layer 1. can.
  • the content of the second light absorber in the first layer 1 is not particularly limited, but is preferably 0.001 wt% or more and 10 wt% or less, and is preferably 0.002 wt% or more and 1.0 wt% or less. More preferably, it is 0.005 wt% or more and 0.6 wt% or less.
  • the content of the second light absorber in the first layer 1 is less than the lower limit, visible light of the first layer 1 (light having a wavelength of 450 nm or more and 800 nm or less) depending on the type of the second light absorber. Absorption may decrease.
  • the content of the second light absorber in the first layer 1 exceeds the upper limit value, no further improvement in the absorbability of visible light (light having a wavelength of 450 nm or more and 800 nm or less) is not observed, and the second layer 1 The adhesion of the 1st layer 1 to the 2nd layer 2 may be impaired.
  • the third light absorber has an absorption wavelength characteristic that absorbs light having a wavelength of 400 nm or more and 800 nm or less.
  • Examples of the third light absorber include perinone-based dyes.
  • perinone-based dye examples include 2,3-naphtharoperinone, 1,8-naphtharoperinone, tetrabromo-1,2-naphtharoperinone, and the like, and one or more of these can be used in combination.
  • the light having a wavelength of 400 nm or more and 800 nm or less can be reliably absorbed in the first layer 1.
  • the content of the third light absorber in the first layer 1 is not particularly limited, but is preferably 0.001 wt% or more and 10 wt% or less, and is preferably 0.002 wt% or more and 1.0 wt% or less. More preferably, it is 0.005 wt% or more and 0.6 wt% or less.
  • the content of the third light absorber in the first layer 1 is less than the lower limit, visible light of the first layer 1 (light having a wavelength of 400 nm or more and 800 nm or less) depending on the type of the third light absorber. Absorption may decrease.
  • the absorbability of visible light (light having a wavelength of 400 nm or more and 800 nm or less) is not improved, and the first layer 1 is not improved.
  • the adhesion of the 1st layer 1 to the 2nd layer 2 may be impaired.
  • the first layer 1 further contains an ultraviolet absorber in addition to the visible light absorber.
  • an ultraviolet absorber in addition to the visible light absorber.
  • the content of the ultraviolet absorber in the first layer 1 may be 0.005 wt% or more in the present embodiment, but is preferably 0.005 wt% or more and 0.200 wt% or less, and is 0. More preferably, it is .008 wt% or more and 0.150 wt% or less. If the content of the ultraviolet absorber in the first layer 1 is less than the lower limit, the absorption of ultraviolet rays in the first layer 1 may decrease depending on the type of the ultraviolet absorber. Further, even if the content of the ultraviolet absorber in the first layer 1 exceeds the upper limit value, no further improvement in the absorption of ultraviolet rays is observed, and the adhesion of the first layer 1 to the second layer 2 is impaired. In some cases.
  • the first layer 1 is covered with the resin material and the visible light absorber contained in the first layer 1 by containing the ultraviolet absorber within the above-mentioned range, and by extension, the optical laminate 10 (cover member). It is possible to more accurately suppress or prevent the object to be deteriorated from being deteriorated by ultraviolet rays. Therefore, the first layer 1 can have better weather resistance.
  • the ultraviolet absorber is contained in the second layer 2, or the third layer 3 in the case of the configuration shown in FIG. 2, or in the ultraviolet absorbing layer 5 in the case of the configuration shown in FIG. Is preferable. Thereby, it is possible to accurately suppress or prevent the fluorescent coloring material from being deteriorated by ultraviolet rays. As a result, the effects of the present invention can be stably exerted for a long period of time.
  • the ultraviolet absorber is not particularly limited, but preferably contains a light absorber that absorbs light having a wavelength of 100 nm or more and 400 nm or less. As a result, it is possible to suppress the transmission of ultraviolet rays and visible light having a relatively short wavelength (light having a wavelength of 400 nm or less). Therefore, the function as an ultraviolet absorber can be surely exhibited.
  • the ultraviolet absorber is not particularly limited, and examples thereof include triazine compounds, benzophenone compounds, benzotriazole compounds, and cyanoacrylate compounds, and one or a combination of two or more of these can be used. .. Among these, a triazine-based compound is particularly preferable. As a result, deterioration of the first layer 1 due to ultraviolet rays can be more reliably prevented or suppressed, and the weather resistance of the optical laminate 10 can be further enhanced.
  • triazine-based compounds examples include 2-mono (hydroxyphenyl) -1,3,5-triazine compound, 2,4-bis (hydroxyphenyl) -1,3,5-triazine compound, 2,4,6- Examples thereof include tris (hydroxyphenyl) -1,3,5-triazine compounds, specifically 2,4-diphenyl-6- (2-hydroxy-4-methoxyphenyl) -1,3,5-triazine, 2,4-Diphenyl-6- (2-hydroxy-4-ethoxyphenyl) -1,3,5-triazine, 2,4-diphenyl- (2-hydroxy-4-propoxyphenyl) -1,3,5- Triazine, 2,4-diphenyl- (2-hydroxy-4-butoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-butoxyphenyl) -1,3, 5-Triazine, 2,4-diphenyl-6- (2-hydroxy-4-hexyloxy
  • triazine-based ultraviolet absorbers examples include “Tinubin 1577”, “Tinubin 460”, “Tinubin 477” (manufactured by BASF Japan), “ADEKA STUB LA-F70” (manufactured by ADEKA), and the like.
  • Teinubin 1577 examples include "Tinubin 1577”, “Tinubin 460”, “Tinubin 477” (manufactured by BASF Japan), “ADEKA STUB LA-F70” (manufactured by ADEKA), and the like.
  • ADEKA STUB LA-F70 manufactured by ADEKA
  • the light having a wavelength of 100 nm or more and 400 nm or less among the light incident on the second layer 2 is reliably absorbed by the second layer 2. can do.
  • the content of the ultraviolet absorber in the second layer 2 is preferably 0.005 wt% or more and 0.200 wt% or less, and 0.008 wt% or more and 0. More preferably, it is 150 wt% or less. If the content of the ultraviolet absorber in the second layer 2 is less than the lower limit, the weather resistance of the second layer 2 may decrease depending on the type of the ultraviolet absorber. Further, even if the content of the ultraviolet absorber in the second layer 2 exceeds the upper limit value, no further improvement in weather resistance is observed, and the adhesion of the second layer 2 to the third layer 3 may be impaired. There is.
  • the first layer 1 may contain a dye (for example, an infrared light absorber) different from the visible light absorbers mentioned above.
  • the dye is not particularly limited, and examples thereof include pigments and dyes, and these can be used alone or in combination.
  • the pigment is not particularly limited, but for example, phthalocyanine pigments such as phthalocyanine green and phthalocyanine blue, fast yellow, disazo yellow, condensed azo yellow, benzoimidazolone yellow, dinitroaniline orange, benzimidazolone orange, toluidine red, permanent.
  • Azo pigments such as carmine, permanent red, naphthol red, condensed azo red, benz imidazolone carmine, benz imidazolone brown, anthraquinone pigments such as anthrapyrimidine yellow and anthraquinonyl red, azomethine pigments such as copper azomethin yellow, quinophthalone.
  • Kinophthalone pigments such as yellow, isoindolin pigments such as isoindolin yellow, nitroso pigments such as nickeldioxime yellow, perinone pigments such as perinone orange, quinacridone magenta, quinacridone maroon, quinacridone scarlet, quinacridone such as quinacridone red
  • Perylene pigments such as perylene red and perylene maroon
  • pyrrolopyrrole pigments such as diketopyrrolopyrrole red
  • organic pigments such as dioxazine pigments such as dioxazine violet, carbon black, lamp black, furnace black, ivory Carbon pigments such as black, graphite and fullerene
  • chromate pigments such as yellow lead and molybdate orange, cadmium yellow, cadmium lithopon yellow, cadmium orange, cadmium lithopon orange, silver vermilion, cadmium red, cadmium lithopon red Sulfur pigments such as
  • Oxide pigments such as Cerulean Blue, Cobalt Aluminum Chrome Blue, Iron Black, Manganese Ferrite Black, Cobalt Ferrite Black, Copper Chrome Black, Copper Chromium Manganese Black, Hydroxide Pigments such as Viridian, Ferocyanide Pigments such as Navy Blue Examples thereof include pigments, silicate pigments such as ultramarine, phosphate pigments such as cobalt violet and mineral violet, and inorganic pigments such as other (for example, cadmium sulfide, cadmium selenium, etc.), and one of them. Species or a combination of two or more can be used.
  • the dye is not particularly limited, and examples thereof include a metal complex dye, a cyan dye, a xanthene dye, an azo dye, a hibiscus dye, a blackberry dye, a raspberry dye, a pomegranate juice dye, and a chlorophyll dye. One of them or two or more of them can be used in combination.
  • the first layer 1 transmits light having a desired wavelength region. It is possible to exert a function that selectively allows.
  • the first layer preferably has a transmittance of light in the wavelength range of 850 nm or more and 1100 nm or less (infrared rays), or light in the wavelength range of 1300 nm or more and 1600 nm or less, preferably 85% or more and 95% or less, and is 86% or more and 93% or less. Is more preferable.
  • the optical laminate can be suitably used as a cover member for covering the light receiving / receiving portion of the infrared sensor or the infrared camera.
  • the thickness of the first layer 1 is not particularly limited, but is preferably 0.1 mm or more and 3 mm or less, and more preferably 0.5 mm or more and 2.0 mm or less. As a result, the first layer 1 can sufficiently exert its effect as a base material layer, and cracks occur in the second layer 2 when the optical laminate 10 is molded into a curved surface shape. Can be prevented.
  • the second layer contains polycarbonate as a main agent and a fluorescent coloring material.
  • the second layer (fluorescent layer) is layered using a resin composition containing polycarbonate as a main agent (main material) having translucency and a fluorescent coloring material that is dissolved and dispersed in the polycarbonate and emits fluorescence. It is a molded body molded into.
  • the second layer can emit fluorescent light by containing a fluorescent coloring material in the resin composition.
  • the optical laminate 10 (cover member) can be used as a cover member having improved design compatibility with the exterior of the sensor unit.
  • Polycarbonate Polycarbonate (polycarbonate-based resin) is contained as the main agent (base resin) of the second layer 2, and is used for molding the second layer 2 into a substrate shape.
  • the same polycarbonate as the polycarbonate constituting the first layer 1 described above can be used.
  • the fluorescent coloring material contained in the second layer 2 is excited by excitation light having the first peak of the intensity of the excitation wavelength in the wavelength range of 200 nm or more and 780 nm or less (visible light), and is 380 nm or more and 780 nm. It is configured to emit emitted light having a second peak of fluorescence wavelength intensity in the following (visible light) wavelength range.
  • the fluorescent coloring material includes a fluorescent dye and a fluorescent pigment.
  • fluorescent coloring material examples include nonionic fluorescent dyes, anthraquinone dyes, perylene dyes, biolantron dyes, isobiolantron dyes, vilantron dyes, flavantron dyes, and bilen dyes. At least one selected from the group consisting of dyes, xanthene dyes, thioxanthene dyes, naphthalene dyes, quinoline dyes, naphthalimide dyes, naphtholactam dyes, benzoanthrone dyes and coumarin dyes.
  • the second layer 2 and thus the optical laminate can have more excellent heat resistance and weather resistance as well as excellent fluorescent color development.
  • the fluorescent dye may be used alone or in combination of two or more.
  • examples of the anthraquinone dye include, for example, Arimoto Chemical Industry Co., Ltd., Last Red 8355 and the like.
  • Examples of the perylene-based pigment include Yellow 083, Orange 240, Red 305 and the like of the Lumogen F series trade name manufactured by BASF Akchen Gezel Shaft.
  • FIG. 4 an example of a spectrum having a first peak of an excitation wavelength is shown in FIG. 4, and an example of a spectrum having a second peak of a fluorescence wavelength is shown in FIG.
  • This spectrum is a fluorescence spectrum of Last Red 8355 manufactured by Arimoto Chemical Industry Co., Ltd., and has a first peak of an excitation wavelength at 548 nm (see FIG. 4) and a second peak of an excitation wavelength at 580 nm (FIG. 5).
  • the difference between the maximum intensity wavelength at the first peak and the maximum intensity wavelength at the second peak is preferably 10 nm or more and 150 nm or less, more preferably 20 nm or more and 110 nm or less, and more preferably 30 nm. It is more preferably 65 nm or less.
  • the difference between the maximum excitation wavelength (first peak) and the maximum fluorescence wavelength (second peak) in a certain fluorescent substance (fluorescent color material) is called a Stokes shift.
  • the larger the Stokes shift the smaller the overlap (self-absorption) between the absorption spectrum and the emission spectrum. As a result, concentration quenching is suppressed and the emission intensity is increased.
  • the maximum intensity of the second peak is preferably 6 or more and 28,000 or less, and more preferably 60 or more and 17,000 or less. As a result, the second layer 2 can fully exert the effect as a fluorescent design layer.
  • the half width of the second peak (emission peak) at the first maximum peak wavelength is preferably 20 nm or more and less than 150 nm, preferably 30 nm or more and less than 100 nm, and 40 nm or more and less than 80 nm. It is even more preferable to have it.
  • the half width of the second peak is within the above range because the color purity and the emission intensity are excellent.
  • the wavelength and full width at half maximum of the second peak can be calculated from the obtained emission spectrum.
  • the full width at half maximum means the wavelength width of the emission spectrum showing an emission intensity of 50% of the maximum emission intensity in the emission spectrum of the fluorescent color material.
  • the emission spectrum of the fluorescent color material is measured, for example, with respect to a 2 mmt-thick polycarbonate substrate to which the fluorescent color material is added at 1.3 wt%, the fluorescence spectrophotometer FP-8600 (JASCO Corporation). For example, it can be carried out under the condition of PMT voltage 600V.
  • the glossiness (surface glossiness) of the second layer 2 is preferably such that the 60 ° mirror glossiness Gs is 20 or more and 200 or less, and more preferably 30 or more and 150 or less.
  • the glossiness (gloss value) is measured at a measurement angle of 60 ° using a gloss meter "PG-1M” manufactured by Nippon Denshoku Industries Co., Ltd. by a method based on JIS Z8741: 1997 (mirror glossiness). It is a value measured when it is set to.
  • the optical laminate 10 can have a high texture (high-grade texture) and a better aesthetic appearance.
  • the content of the fluorescent color material in the second layer 2 is preferably 0.001 wt% or more and 5.0 wt% or less, and more preferably 0.005 wt% or more and 3.0 wt% or less.
  • the content of the fluorescent color material is 0.001 wt% or more, a sufficient amount of fluorescence can be emitted. Further, when the content of the fluorescent color material is 5.0 wt% or less, the fluorescent color material is unlikely to aggregate inside the resin, and the fluorescence luminous efficiency is sufficiently increased with the minimum necessary amount of the fluorescent color material at low cost. It is possible to reduce the burden on the environment at the time of incineration of the optical laminate. This makes it possible to obtain an optical laminate having excellent fluorescence color development.
  • the thickness of the second layer 2 is not particularly limited, but is preferably 10 ⁇ m or more and 1000 ⁇ m or less, and more preferably 20 ⁇ m or more and 500 ⁇ m or less. As a result, the second layer 2 can sufficiently exert the effect as a fluorescent layer, and prevents cracks from occurring in the second layer 2 when the optical laminate 10 is molded into a curved surface shape. can do.
  • the second layer 2 may further contain an ultraviolet absorber in addition to the fluorescent coloring material.
  • an ultraviolet absorber in addition to the fluorescent coloring material.
  • the same ultraviolet absorbers as those mentioned in the first layer 1 above can be used.
  • the second layer 2 may contain a dye (for example, an infrared light absorber) different from the fluorescent coloring material and the ultraviolet absorber mentioned above.
  • a dye for example, an infrared light absorber
  • the dye is not particularly limited, and examples thereof include pigments and dyes, and these can be used alone or in combination.
  • pigments, dyes, etc. the same pigments, dyes, etc. as those mentioned in the first layer 1 above can be used.
  • the optical laminate 10 having the above configuration can be obtained by, for example, the following manufacturing method.
  • the method for producing the optical laminate 10 includes a base material layer forming step for forming the first layer 1 and a fluorescent layer forming step for forming the second layer 2. These steps may be carried out in sequence, and the first layer 1 and the second layer 2 may be laminated or coextruded.
  • the first layer 1 formed as a strip-shaped sheet is formed. Specifically, a molten sheet is formed by extruding a resin composition for forming the first layer 1 in a molten state or a softened state in a band shape.
  • a molten resin in which the resin composition in which the constituent materials constituting the first layer 1 are kneaded described above is in a molten state is extruded from, for example, an opening provided in the T-die to form a strip-shaped sheet.
  • a molten sheet in a molten or softened state can be continuously sent out.
  • the second layer 2 formed as a strip-shaped sheet is formed. Specifically, a molten sheet is formed by extruding a resin composition for forming the second layer 2 in a molten state or a softened state in a band shape.
  • a molten resin in which the resin composition in which the constituent materials constituting the second layer 2 are kneaded described above is in a molten state is extruded from, for example, an opening provided in the T-die to form a strip-shaped sheet.
  • a molten sheet in a molten or softened state can be continuously sent out.
  • the first layer 1 and the second layer 2 are extruded from different T dies at the same time, and the first layer 1 in the molten or softened state and the second layer 2 in the molten or softened state are laminated.
  • a molten sheet having a two-layer structure is obtained.
  • the outer peripheral surfaces of the two rolls each have a smooth roll shape. Therefore, both sides of the molten sheet are flattened by being pressed against the outer peripheral surface having smoothness.
  • the separation distance between the outer peripheral surfaces of the two rolls is set to the thickness of the optical laminate 10 to be formed, and by appropriately setting this separation distance to a predetermined size, melting of a desired thickness is performed. A sheet (optical laminate 10) can be obtained.
  • the two rolls are used for flattening both sides and for setting the thickness of the molten sheet, respectively.
  • the optical laminate 10 (melted sheet) in a molten state or a softened state, which is flattened on both sides and set to a predetermined thickness, is cooled (cooling step). As a result, the optical laminate 10 in which the first layer 1 and the second layer 2 are laminated is formed.
  • This cooling step can be performed, for example, by bringing the molten sheet into contact with a cooling roll provided with cooling means.
  • the optical laminate 10 formed into a strip-shaped sheet is formed.
  • the first layer 1 may be formed as follows. That is, a molten resin in which the resin composition for forming the first layer 1 is in a molten state is used to form granular granules, and then the granular material is used to form a sheet in a molten state.
  • the first layer 1 may be formed by cooling the molten resin after obtaining the molten resin forming the above. This also applies to the second layer 2.
  • the optical laminate 10 forming a flat plate is heated and pressed against a mold immediately after the resin is softened to form a curved surface shape.
  • a method of molding can be mentioned.
  • the method for heating the resin is not particularly limited, and examples thereof include known methods such as an infrared drying oven, a gas type hot air drying oven, and a hot air circulation type drying oven. Further, as a method of thermoforming, for example, a method such as vacuum forming, compressed air forming, press molding, free blow molding and the like can be mentioned.
  • the curved surface shape is a shape having a curved surface, and includes, for example, a shape in which the cross-sectional shape of the molded body is an arc shape.
  • the optical laminate 10 in which a part or all of the flat plate is formed into a curved surface shape.
  • FIG. 2 is a vertical sectional view showing a second embodiment of the optical laminate of the present invention.
  • the optical laminate 10A of the second embodiment will be described mainly on the differences from the optical laminate 10 of the first embodiment, and the same matters will be omitted.
  • the optical laminate 10A of the present embodiment is the same as that of the first embodiment except that it has a third layer 3 (protective layer) laminated on the second layer 2.
  • the third layer 3 is provided so as to be laminated on the second layer 2 to cover the second layer 2, thereby functioning as a hard coat layer (coating layer) for protecting the second layer 2 and having optical properties. Excellent weather resistance, durability and scratch resistance can be imparted to the laminated body 10.
  • the resin composition used to form the third layer 3 contains a silicon-modified (meth) acrylic resin and a urethane (meth) acrylate.
  • the resin composition contains a silicon-modified (meth) acrylic resin
  • the surface hardness of the third layer 3 is increased, and excellent scratch resistance can be imparted to the optical laminate 10.
  • the resin composition contains urethane (meth) acrylate, the flexibility of the third layer 3 can be improved, and the surface of the third layer 3 when the optical laminate 10 is thermoformed. It is possible to suppress the occurrence of cracks and impart excellent thermoformability to the optical laminate 10.
  • silicon-modified (meth) acrylic resin In the silicon-modified (meth) acrylic resin, a main chain in which a structural unit derived from a (meth) acrylic monomer having a (meth) acryloyl group is repeated and a structural unit linked to the main chain and having a siloxane bond are repeated. It is a polymer (prepolymer) having a repeating body.
  • the silicon-modified (meth) acrylic resin imparts transparency to the third layer 3 by having the main chain, and has a repeating body in which the structural unit having the siloxane bond is repeated. Scratch resistance is imparted to 3 layers 3.
  • the main chain of the silicon-modified (meth) acrylic resin is specifically composed of repeating structural units derived from a monomer having at least one (meth) acryloyl group of the following formulas (1) and (2). What has been done is mentioned.
  • n represents an integer of 1 or more
  • R1 independently represents a hydrocarbon group, an organic group, or a hydrogen atom
  • R0 independently represents a hydrocarbon group or a hydrogen atom.
  • m represents an integer of 1 or more
  • R2 independently represents a hydrocarbon group, an organic group, or a hydrogen atom
  • R0 independently represents a hydrocarbon group or a hydrogen atom.
  • the terminal or side chain of the main chain has a hydroxyl group (-OH). That is, in the case of the formula (1) or the formula (2), it is preferable that R1 or R2 is hydrogen.
  • the adhesion between the third layer 3 and the polycarbonate can be improved. Therefore, the adhesion of the third layer 3 to the second layer 2 is enhanced, and it is possible to prevent the second layer 2 and the third layer 3 from being unintentionally peeled off.
  • a curing agent having an isocyanate group which will be described later, is used, the hydroxyl group reacts with the isocyanate group of the curing agent to form a crosslinked structure by a urethane bond.
  • At least one end or side chain of the main chain is bound to a repeater in which structural units having a siloxane bond are repeated.
  • the silicon-modified (meth) acrylic resin has a repeating body in which the structural unit having the siloxane bond is repeated, so that the third layer 3 has better heat resistance and weather resistance. Can be obtained. Further, since the hard third layer 3 can be obtained due to the high bonding force of the siloxane bond, the scratch resistance of the optical laminate 10 to impacts such as sand dust and stepping stones can be further increased.
  • repeating body in which the structural unit having a siloxane bond is repeated include those composed of repeating the structural unit having at least one of the following formulas (3) and (4). Be done.
  • X 1 represents a hydrocarbon group or a hydroxyl group.
  • X 2 represents a hydrocarbon group or a hydroxyl group
  • X 3 represents a divalent group in which hydrogen is removed from the hydrocarbon group or the hydroxyl group.
  • repeating body in which the structural unit having the siloxane bond is repeated include those having polyorganosiloxane and those having silsesquioxane.
  • the structure of silsesquioxane may be any structure such as a random structure, a cage structure, and a ladder structure (ladder type structure).
  • hydrocarbon group examples include an alkyl group such as a methyl group, an ethyl group, a propyl group and an isopropyl group, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cycloalkyl group such as a cyclohexyl group, a phenyl group and a naphthyl group, and 2 -An aryl group such as a methylphenyl group, an aralkyl group such as a benzyl group, a diphenylmethyl group and a naphthylmethyl group, a phenyl group, a biphenyl group and the like can be mentioned.
  • alkyl group such as a methyl group, an ethyl group, a propyl group and an isopropyl group, a cyclopropyl group, a cyclobutyl group, a cyclopentyl
  • an unsaturated double bond is introduced into the terminal or side chain of the repeating body in which the structural unit having a siloxane bond is repeated.
  • the silicon-modified (meth) acrylic resin and the urethane (meth) acrylate are more uniformly dispersed, and as a result, the third layer 3 more uniformly expresses the above-mentioned characteristics throughout. be able to.
  • the content of the silicon-modified (meth) acrylic resin in the resin composition is not particularly limited, but is preferably 5% by weight or more and 45% by weight or less, and 11% by weight or more and 28% by weight or less. Is more preferable.
  • the content of the silicon-modified (meth) acrylic resin in the resin composition is less than the lower limit, the hardness of the third layer 3 obtained by the resin composition may decrease. Further, when the content of the silicon-modified (meth) acrylic resin in the resin composition exceeds the upper limit value, the content of the material other than the silicon-modified (meth) acrylic resin in the resin composition is relatively high. This may decrease, and the flexibility of the third layer 3 formed by using the resin composition may decrease.
  • the urethane (meth) acrylate is a compound having a main chain having a urethane bond (-OCONH-) and a (meth) acryloyl group linked to the main chain.
  • the urethane (meth) acrylate is a monomer or an oligomer.
  • This urethane (meth) acrylate is a compound with excellent flexibility because it has a urethane bond. Therefore, when the third layer 3 contains urethane (meth) acrylate, further flexibility (flexibility) can be imparted to the third layer 3.
  • the number of (meth) acryloyl groups in one molecule of the urethane (meth) acrylate is preferably two or more.
  • the urethane (meth) acrylate When the number of (meth) acryloyl groups in one molecule of the urethane (meth) acrylate is two or more, the urethane (meth) acrylate can be bonded to the silicon-modified (meth) acrylic resin to form a network. , The curing of the third layer 3 can be promoted. As a result, the crosslink density of the third layer 3 is increased, and the hardness of the third layer 3 can be increased to some extent. Therefore, the properties such as scratch resistance and solvent resistance of the third layer 3 can be improved.
  • the urethane (meth) acrylate can be obtained as a reaction product of an isocyanate compound obtained by reacting a polyol with a diisocyanate and a (meth) acrylate monomer having a hydroxyl group.
  • polyol examples include polyether polyols, polyester polyols, and polycarbonate diols.
  • the polyether polyol is a polyethylene oxide, polypropylene oxide, or ethylene oxide-propylene oxide random copolymer, preferably having a number average molecular weight of less than 1300.
  • a polyether polyol having a number average molecular weight of 1300 or more is used, the flexibility of the third layer 3 is too high, and there is a risk that the third layer 3 is easily scratched by the impact of sand dust or stepping stones. be.
  • the polyester polyol can be obtained, for example, by subjecting a diol to a dicarboxylic acid or a dicarboxylic acid chloride in a polycondensation reaction, or by esterifying a diol or a dicarboxylic acid and causing a transesterification reaction.
  • Dicarboxylic acids include adipic acid, succinic acid, glutaric acid, pimelli acid, sebacic acid, azelaic acid, maleic acid, terephthalic acid, isophthalic acid, phthalic acid, etc.
  • diols include ethylene glycol, 1,4-butanediol, 1. , 6-Hexenediol, diethylene glycol, dipropylene glycol, triethylene glycol, tetraethylene glycol, tripropylene glycol, tetrapropylene glycol and the like are used.
  • polycarbonate diol examples include 1,4-butanediol, 1,6-hexanediol, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, and dipropylene glycol.
  • 2-Ethyl-1,3-hexanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,4-cyclohexanediol, polyoxyethylene glycol, etc. are used, and even one kind is 2 Seeds or more may be used together.
  • acrylate monomer having a hydroxyl group examples include trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, and 3-hydroxybutyl acrylate. , Polyethylene glycol monoacrylate.
  • the weight average molecular weight of the urethane (meth) acrylate is not particularly limited , but is preferably 1.0 ⁇ 10 3 or more and 2.0 ⁇ 10 3 or less, and 1.1 ⁇ 10 3 or more and 1.5 ⁇ and more preferably 10 3 or less.
  • the weight average molecular weight of the urethane (meth) acrylate is within the above range, the balance between the flexibility and hardness of the third layer 3 becomes good, and when the optical laminate 10 is molded into a curved surface shape. However, it is possible to suppress the occurrence of cracks in the bent portion.
  • the weight average molecular weight of the urethane (meth) acrylate can be measured by, for example, GPC (gel permeation chromatography).
  • the content of the urethane (meth) acrylate in the resin composition is not particularly limited, but is preferably 10% or more and 75% or less, and more preferably 17% or more and 50% or less.
  • the flexibility of the third layer 3 may be poor. Further, when the content of the urethane (meth) acrylate in the resin composition exceeds the upper limit value, the content of the material other than the urethane (meth) acrylate in the resin composition is relatively reduced, and the optics The scratch resistance of the sex laminate 10 may decrease.
  • the resin composition preferably further contains an acrylate monomer.
  • the adhesion between the second layer 2 and the third layer 3 is improved, and the third layer 3 is less likely to be peeled from the second layer 2 during thermal bending.
  • the acrylate monomer also functions as a reactive diluent, the viscosity of the resin composition can be reduced.
  • the acrylate monomer is not particularly limited, but for example, pentaerythritol tetraacrylate, ditrimethylolpropantriacrylate, trimethylolpropantriacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, ethoxylated trimethylolpropantriacrylate, ethoxy.
  • an aromatic-free resin from the viewpoint of improving the weather resistance of the optical laminate 10, it is preferable to use an aromatic-free resin.
  • the content of the acrylate monomer in the resin composition is not particularly limited, but is preferably 15% or more and 55% or less, and more preferably 27% or more and 55% or less.
  • the content of the acrylate monomer in the resin composition is less than the lower limit, the adhesion between the second layer 2 and the third layer 3 is insufficient, and the third layer 3 is peeled from the second layer 2 during thermal bending. It will be easier to do. Further, the crosslink density of the third layer 3 may decrease, and the scratch resistance of the optical laminate 10 may decrease. Further, when the content of the acrylate monomer in the resin composition exceeds the upper limit value, the third layer 3 may not be stretched and may be cracked at the time of thermal bending.
  • the resin composition preferably further contains isocyanate as a cross-linking agent for bonding (cross-linking) silicon-modified (meth) acrylate between molecules.
  • isocyanate as a cross-linking agent, the hydroxyl group of the silicon-modified (meth) acrylate reacts with the isocyanate group of the isocyanate to form a cross-linked structure composed of urethane bonds. Thereby, the scratch resistance of the resin composition can be improved.
  • the isocyanate is not particularly limited, and examples thereof include polyisocyanates having two or more isocyanate groups, and more preferably, it also contains a polyfunctional isocyanate having three or more isocyanate groups, and further, scratch resistance. Can be improved.
  • the content of the isocyanate in the resin composition is not particularly limited, but is preferably 3% or more and 40% or less, and more preferably 10% or more and 25% or less.
  • the scratch resistance of the third layer 3 may decrease. Further, when the content of the isocyanate in the resin composition exceeds the upper limit value, an unreacted product of isocyanate remains in the coating film as an impurity, so that the coating film has scratch resistance and durability (adhesion of the coating film). ) May decrease.
  • the resin composition may contain an ultraviolet absorber.
  • the ultraviolet absorber is not particularly limited, and examples thereof include triazine-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based ultraviolet absorbers, and one or two of these can be used in combination.
  • a triazine-based ultraviolet absorber is particularly preferably used, and among the triazine-based ultraviolet absorbers, a hydroxyphenyl triazine-based ultraviolet absorber is more preferable.
  • deterioration of the third layer 3 due to ultraviolet rays can be more reliably prevented or suppressed, and the weather resistance of the optical laminate 10 can be further increased.
  • the content of the ultraviolet absorber in the resin composition is not particularly limited, but is preferably 0.1 part by weight or more and 20 parts by weight or less, and is preferably 1 part by weight or more and 10 parts by weight or less. Is more preferable. If the content of the ultraviolet absorber in the resin composition is less than the lower limit, the weather resistance of the third layer 3 may decrease. Further, even if the content of the ultraviolet absorber in the resin composition exceeds the upper limit value, no further improvement in weather resistance is observed, and the transparency of the third layer 3 and the transparency of the third layer 3 and the third layer 3 The adhesion to the second layer 2 may be impaired.
  • the resin composition may contain a photopolymerization initiator.
  • the photopolymerization initiator is not particularly limited, but includes benzoin or benzoin alkyl ethers such as benzoin, benzoin methyl ether, benzoin ethyl ether and benzoin isopropyl ether, aromatic ketones such as benzophenone and benzoyl benzoic acid, and benzyl.
  • the content of the photopolymerization initiator in the resin composition is not particularly limited, but is preferably 0.5 parts by weight or more and 15 parts by weight or less, and is preferably 1 part by weight or more and 10 parts by weight or less. It is more preferable to have it. If the content of the photopolymerization initiator in the resin composition is less than the lower limit, it may be difficult to sufficiently cure the resin composition. Further, even if the content of the photopolymerization initiator in the resin composition exceeds the upper limit value, no further improvement is observed.
  • the resin composition may contain other materials other than the above-mentioned materials.
  • other materials include resin materials other than the silicon-modified (meth) acrylic resin, colorants, sensitizers, stabilizers, surfactants, antioxidants, antioxidants, antistatic agents, and surface conditioners. And a solvent and the like.
  • the solvent examples include aliphatic hydrocarbons such as hexane, heptane and cyclohexane, aromatic hydrocarbons such as toluene and xylene, alcohols such as methanol, ethanol, propanol and butanol, methyl ethyl ketone, 2-pentanone, isophorone and diisobutyl ketone.
  • aliphatic hydrocarbons such as hexane, heptane and cyclohexane
  • aromatic hydrocarbons such as toluene and xylene
  • alcohols such as methanol, ethanol, propanol and butanol, methyl ethyl ketone, 2-pentanone, isophorone and diisobutyl ketone.
  • esters such as ketone, ethyl acetate, butyl acetate, isobutyl acetate and methoxypropyl acetate
  • cellosolve solvents such as ethyl cellosolve
  • glycol solvents such as methoxypropanol, ethoxypropanol and methoxybutanol.
  • alcohol-based, cellosolve-based, and glycol-based materials may react with isocyanates in the resin composition, and therefore it is desirable not to use them alone. It is more preferable to use a hydrocarbon-based solvent, a ketone-based solvent, or an ester-based solvent as the main component of the solvent.
  • the thickness of the third layer 3 is not particularly limited, but is preferably 1 ⁇ m or more and 40 ⁇ m or less, more preferably 2 ⁇ m or more and 30 ⁇ m or less, and further preferably 3 ⁇ m or more and 20 ⁇ m or less. If the thickness of the third layer 3 is less than the lower limit, the weather resistance of the optical laminate 10 may decrease. On the other hand, if the thickness of the third layer 3 exceeds the upper limit value, cracks may occur at the bent portion when the optical laminate 10 is formed into a curved surface shape.
  • FIG. 3 is a vertical sectional view showing a third embodiment of the optical laminate of the present invention.
  • the optical laminate 10B of the third embodiment will be described mainly on the differences from the optical laminate 10 of the first embodiment, and the same matters will be omitted.
  • the optical laminate 10B has a first layer 1, a second layer 2, and an ultraviolet absorbing layer 5 that absorbs ultraviolet rays, and these are laminated in order from the lower side. Yes (see Figure 3).
  • the ultraviolet absorbing layer 5 contains a resin material having translucency as a main agent and an ultraviolet absorber that is dissolved and dispersed in the resin material and absorbs ultraviolet rays, thereby transmitting ultraviolet rays and visible light. It has a function of allowing and suppressing or preventing the transmission of ultraviolet rays.
  • the resin material contained in the ultraviolet absorbing layer 5 is contained as a main agent of each layer and is for molding each layer into a substrate shape.
  • acrylic resin polystyrene resin, polyethylene resin, polypropylene resin.
  • polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polycarbonates, vinyl chloride resins, polyacetal resins, etc., and one or more of these may be used in combination.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • polycarbonates such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN)
  • vinyl chloride resins polyacetal resins, etc.
  • the ultraviolet absorber contained in the ultraviolet absorbing layer 5 absorbs light having a wavelength of 100 nm or more and 400 nm or less in the present embodiment, similarly to the ultraviolet absorber which may be contained in the first layer 1 of the first embodiment. It is preferable that the light absorber is contained. Further, as the ultraviolet absorber, the same one as described as the ultraviolet absorber that may be contained in the first layer 1 in the first embodiment can be used.
  • the optical laminate 10B of the present embodiment may also have the third layer 3 (protective layer) laminated on the second layer 2 as shown in the second embodiment.
  • the optical laminate of the present invention as described above is used as a cover member for covering the light receiving / receiving portion of the infrared sensor.
  • the optical laminate is applied to a cover member for covering various sensors and cameras provided in a moving body such as an automobile or a two-wheeled vehicle, and for example, a cover member included in a brake lamp or a hazard lamp provided in the moving body. It can be applied to a spoiler provided on a moving body, a lens material (cover member) provided on a surveillance camera, and the like. Further, the optical laminate can be applied to a lens material (cover member) such as eyeglasses and sunglasses.
  • the optical laminate of the present invention is applied to a cover member covering various sensors, as described above, in addition to application to various sensors (built-in sensors, etc.) provided in a moving body such as an automobile.
  • various sensors built-in sensors, etc.
  • it may be applied to a sensor (built-in sensor, etc.) provided in an automatic ticket vending machine, a vending machine, etc. installed outdoors.
  • the moving body of the present invention is characterized by including an optical laminate as described above.
  • the moving body of the present invention is provided with the above-mentioned optical laminate as a cover member for covering the light emitting / receiving portion of the infrared sensor, so that the design compatibility with the exterior of the sensor unit can be improved and the design width can be widened. The spread design can be further improved.
  • the moving body (moving body of the present invention) provided with the optical laminate of the present invention as a cover member includes automobiles, two-wheeled vehicles (motorcycles, bicycles), ships, railroad vehicles, airplanes, buses, forklifts, construction sites, etc. It may be a work vehicle, a golf cart, an unmanned transport vehicle, a drone, etc., which perform a predetermined work in the above.
  • optical laminate and the moving body of the present invention have been described above, but the present invention is not limited thereto.
  • each configuration can be replaced with an arbitrary configuration capable of exhibiting the same function, or an arbitrary configuration can be added.
  • an optical laminate having improved design compatibility with the exterior of the sensor unit.
  • Such an optical laminate can be widely used as a cover member for covering the light receiving / receiving portion of the infrared sensor. Therefore, the present invention has industrial applicability.
  • the first layer forming material and the second layer forming material are stored in different extruders, melted, coextruded from a T die, and the first layer and the second layer are laminated. I got the wood. Then, the sheet material was cooled and molded, and cut into a rectangular shape having an average thickness of 2.0 mm and a plan view of 100 mm ⁇ 200 mm to prepare an optical laminate.
  • the average transmittance of light having a wavelength range of 300 nm to 700 nm in the first layer of the obtained optical laminate is 1% or less, and the average transmittance of light having a wavelength range of 800 nm to 1100 nm is 89%.
  • the average transmittance of light having a wavelength range of 1300 nm to 1600 nm was 87%.
  • the thickness (total thickness) of the optical laminate was 2 mm.
  • the thickness of the second layer of the obtained optical laminate was 40 ⁇ m.
  • the excitation wavelength of the first peak of the excitation light is 550 nm
  • the fluorescence wavelength of the second peak of the emitted light is 590 nm
  • the maximum intensity of the second peak is 1570
  • the average wavelength is close to 905 nm.
  • the average transmittance of infrared light was 89%
  • the average transmittance of near-infrared light having an average wavelength of 1550 nm was 87%.
  • Example 2 An optical laminate of Example 2 was obtained in the same manner as in Example 1 except that the configuration of the optical laminate was changed as shown in Table 1.
  • Example 3 An optical laminate of Example 3 was obtained in the same manner as in Example 1 except that the configuration of the optical laminate was changed as shown in Table 1.
  • Example 4 An optical laminate of Example 4 was obtained in the same manner as in Example 1 except that the configuration of the optical laminate was changed as shown in Table 1.
  • Comparative Example 1 An optical laminate of Comparative Example 1 was obtained in the same manner as in Example 1 except that the configuration of the optical laminate was changed as shown in Table 1.
  • Comparative Example 2 An optical laminate of Comparative Example 1 was obtained in the same manner as in Example 1 except that the configuration of the optical laminate was changed as shown in Table 2.

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  • Optics & Photonics (AREA)
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PCT/JP2021/011229 2020-03-19 2021-03-18 光学性積層体および移動体 WO2021187600A1 (ja)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010002704A (ja) * 2008-06-20 2010-01-07 Mitsubishi Engineering Plastics Corp フィルター用樹脂組成物
JP2013101166A (ja) * 2011-10-12 2013-05-23 Toyo Ink Sc Holdings Co Ltd カラーフィルタ用着色組成物、およびカラーフィルタ
JP2016177273A (ja) * 2015-03-19 2016-10-06 Jsr株式会社 硬化性組成物、硬化膜、赤外光透過フィルタ及び固体撮像装置
JP2018109742A (ja) * 2016-12-28 2018-07-12 住友ベークライト株式会社 光学性層
JP2018169579A (ja) * 2017-03-30 2018-11-01 住友ベークライト株式会社 光学性層
WO2019022213A1 (ja) * 2017-07-28 2019-01-31 株式会社クラレ 積層押出樹脂板及び赤外線センサー付き液晶ディスプレイ用の保護板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010002704A (ja) * 2008-06-20 2010-01-07 Mitsubishi Engineering Plastics Corp フィルター用樹脂組成物
JP2013101166A (ja) * 2011-10-12 2013-05-23 Toyo Ink Sc Holdings Co Ltd カラーフィルタ用着色組成物、およびカラーフィルタ
JP2016177273A (ja) * 2015-03-19 2016-10-06 Jsr株式会社 硬化性組成物、硬化膜、赤外光透過フィルタ及び固体撮像装置
JP2018109742A (ja) * 2016-12-28 2018-07-12 住友ベークライト株式会社 光学性層
JP2018169579A (ja) * 2017-03-30 2018-11-01 住友ベークライト株式会社 光学性層
WO2019022213A1 (ja) * 2017-07-28 2019-01-31 株式会社クラレ 積層押出樹脂板及び赤外線センサー付き液晶ディスプレイ用の保護板

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