WO2016190137A1 - Corps stratifié transparent, écran transparent pourvu de celui-ci, et système de projection d'image pourvu de celui-ci - Google Patents

Corps stratifié transparent, écran transparent pourvu de celui-ci, et système de projection d'image pourvu de celui-ci Download PDF

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Publication number
WO2016190137A1
WO2016190137A1 PCT/JP2016/064330 JP2016064330W WO2016190137A1 WO 2016190137 A1 WO2016190137 A1 WO 2016190137A1 JP 2016064330 W JP2016064330 W JP 2016064330W WO 2016190137 A1 WO2016190137 A1 WO 2016190137A1
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Prior art keywords
transparent
fine particles
layer
transparent laminate
light
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PCT/JP2016/064330
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English (en)
Japanese (ja)
Inventor
彰 松尾
孝介 八牧
咲耶子 内澤
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Ｊｘエネルギー株式会社
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Priority to JP2017520628A priority Critical patent/JPWO2016190137A1/ja
Publication of WO2016190137A1 publication Critical patent/WO2016190137A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Definitions

  • the present invention relates to a transparent laminate that can achieve both the visibility of projection light and the visibility of transmitted light by efficiently reflecting and diffusing the projection light, a transparent screen including the same, and a video projection system including the same About.
  • a projector-type reflection screen characterized by providing a light diffusive reflection layer has been proposed (see Patent Document 2). Furthermore, a reflection screen has been proposed in which a light diffusion layer formed of a continuous layer made of a transparent resin and a dispersion layer made of anisotropic transparent particles is laminated on a light-reflective substrate. (See Patent Document 3).
  • Patent Documents 1 to 3 have the following technical problems.
  • the reflective screen described in Patent Document 2 contains a scaly aluminum paste at a high concentration of 10 to 80 weight as a light reflecting agent, and there is a technical problem that the obtained film cannot be seen through.
  • anisotropic transparent particles dispersed in a dispersion layer are non-metallic particles of mica, talc, and montmorillonite. In particular, since talc and montmorillonite are clay-based particles, regular reflectance is obtained. However, there is a technical problem that it cannot be suitably used as a reflective transparent screen.
  • the present invention has been made in view of the above technical problems, and its purpose is to efficiently reflect and diffuse the projection light, thereby providing excellent visibility of the projection light, with a wide viewing angle and high brightness.
  • the object is to provide a transparent laminate having excellent visibility of transmitted light.
  • Another object of the present invention is to provide a transparent screen including the transparent laminate, and an image projection system including the transparent laminate or the transparent screen and an image projection device.
  • the present inventors have found that a transparent light scattering layer in which substantially spherical fine particles are dispersed in a binder, and a transparent light reflecting layer in which glittering flaky fine particles are dispersed. It has been found that the above-mentioned technical problems can be solved and a transparent laminate that can be suitably used for a transparent screen can be obtained. The present invention has been completed based on such findings.
  • a transparent light scattering layer comprising a binder and substantially spherical fine particles;
  • a transparent light reflecting layer comprising a binder and glittering flaky fine particles on at least one surface side of the transparent light scattering layer;
  • a transparent laminate comprising: is provided.
  • an average diameter of primary particles of the glittering flaky fine particles is 0.01 to 200 ⁇ m.
  • the specular reflectance of the glittering flaky fine particles is preferably 12% or more.
  • the glittering flaky fine particles preferably have an average aspect ratio of 3 to 800.
  • the glittering flaky fine particles are made of aluminum, silver, platinum, gold, titanium, nickel, tin, tin-cobalt alloy, indium, chromium, titanium oxide, aluminum oxide, and zinc sulfide. It is preferable to use a metallic fine particle selected from the above, or a glittering material obtained by coating natural mica or synthetic mica with a metal oxide.
  • the binder forming the transparent light scattering layer and / or the transparent light reflecting layer is an organic binder.
  • the organic binder is preferably a thermoplastic resin or a self-crosslinking resin.
  • the thermoplastic resin is preferably at least one selected from the group consisting of an acrylic resin, a polyester resin, a polyolefin resin, a vinyl resin, a polycarbonate resin, and a polystyrene resin. .
  • the content of the glittering flaky fine particles is preferably 0.0001 to 5.0% by mass with respect to the binder of the transparent light reflecting layer.
  • the difference between the refractive index n 2 of the substantially spherical fine particles and the refractive index n 1 of the binder of the transparent light scattering layer is the following formula (1):
  • the substantially spherical fine particles are selected from the group consisting of zirconium oxide, diamond, zinc oxide, titanium oxide, cerium oxide, barium titanate, strontium titanate, crosslinked acrylic resin, crosslinked styrene resin, and silica. It is preferable that it is at least one kind.
  • the median diameter of the primary particles of the substantially spherical fine particles is preferably 0.1 to 100 nm.
  • the content of the substantially spherical fine particles is preferably 0.0001 to 2.0% by mass with respect to the binder of the transparent light scattering layer.
  • the transparent light reflecting layer is provided on both sides of the transparent light scattering layer.
  • the transparent laminate preferably has a haze value of 50% or less.
  • the transparent laminate preferably has a total light transmittance of 70% or more.
  • the transparent laminate has a image clarity of 70% or more.
  • the transparent laminate is preferably for a reflective transparent screen.
  • a reflective transparent screen provided with the above transparent laminate.
  • a vehicle member provided with the above transparent laminate or the above reflective transparent screen.
  • a building member provided with the transparent laminate or the reflective transparent screen.
  • an image projection system including the above-described transparent laminate or the above-described reflective transparent screen, and an image projection device.
  • the projection light emitted from the light source is anisotropically scattered and reflected by the transparent light scattering layer in which substantially spherical fine particles are dispersed.
  • the projection light transmitted without reflection can project a clear image on a transparent screen by further scattering and reflecting diffused light anisotropically with a transparent light reflection layer in which glittering flaky fine particles are dispersed.
  • the viewing angle and brightness are excellent.
  • the transparent laminate according to the present invention can be used suitably as a reflective transparent screen because it can achieve both the visibility of projected light, the visibility of transmitted light, and the brightness of an image.
  • 1 is a schematic diagram showing an embodiment of a video projection system according to the present invention.
  • the transparent laminate according to the present invention comprises a transparent light scattering layer in which substantially spherical fine particles are dispersed, and a transparent light reflecting layer in which glittering flaky fine particles are dispersed on at least one surface side of the transparent light scattering layer.
  • the transparent laminate according to the present invention may include a transparent light reflecting layer on both sides of the transparent light scattering layer.
  • the transparent laminate according to the present invention may further include other layers such as a protective layer, a base material layer, an adhesive layer, and an antireflection layer.
  • the transparent laminate according to the present invention can be seen through and can be suitably used as a transparent screen.
  • the transparent laminate according to the present invention has a two-layer structure, preferably a three-layer structure, the light utilization efficiency is improved, so that it has high brightness, excellent visibility, a wide viewing angle, and transparency. It is excellent.
  • a transparent laminate can be suitably used as a reflective screen used for a head-up display, a wearable display, and the like.
  • the term “transparent” is sufficient as long as the transparency can be realized according to the application, and includes “translucent”.
  • FIG. 2 and 3 are schematic cross-sectional views in the thickness direction of an embodiment of the transparent laminate according to the present invention.
  • the transparent reflector 11 having the conventional single-layer structure shown in FIG. 1 a part of the projection light 14 (solid line) is reflected to the viewer 16 side by the fine particles 13 in the binder 12 (scattered / reflected light 15 (broken line) )), The transmitted projection light 14 does not contribute to image formation.
  • the transparent light scattering layer 24 in which substantially spherical fine particles 23 are dispersed in a binder 22 and a glitter in a binder 25 from the viewer 30 side.
  • a transparent light reflecting layer 27 in which conductive flaky fine particles 26 are dispersed.
  • part of the projection light 28 solid line
  • the substantially spherical fine particles 23 in the transparent light scattering layer 24 sintered / reflected light 29 (broken line)
  • the light scattered by the substantially spherical fine particles 23 is reflected toward the viewer 30 by the glittering flaky fine particles 26 in the transparent light reflecting layer 27.
  • the projection light 28 transmitted through the transparent light scattering layer 24 is reflected toward the viewer 30 by the glittering flaky fine particles 26 in the transparent light reflecting layer 27. Therefore, the projection light 28 can be efficiently scattered and reflected.
  • 3 includes a transparent light reflecting layer 34 in which glittering flaky fine particles 33 are dispersed in a binder 32, and a binder 35 from the viewer 43 side.
  • the projection light 41 In the transparent laminate 31 having a three-layer structure, a part of the projection light 41 (solid line) is reflected to the viewer 43 side by the glittering flaky fine particles 33 in the transparent light reflection layer 34 (scattered / reflected light 42 (broken line) )). Further, the projection light 41 transmitted through the transparent light reflecting layer 34 is reflected toward the viewer 43 by the substantially spherical fine particles 36 in the transparent light scattering layer 37, or scattered by the substantially spherical fine particles 36 and in the transparent light reflecting layer 40. Or reflected by the glittering flaky fine particles 39 toward the viewer 43 side. Further, the projection light 41 transmitted through the transparent light scattering layer 37 is reflected toward the viewer 43 by the glittering flaky fine particles 39 in the transparent light reflecting layer 40. Therefore, the projection light 41 can be efficiently scattered and reflected. As described above, the multilayer structure allows the reflected light to be visually recognized more efficiently than the case where substantially spherical fine particles and bright flaky fine particles are dispersed in one layer.
  • the transparent laminate preferably has a haze value of 50% or less, more preferably 1% or more and 40% or less, more preferably 1.3% or more and 30% or less, and even more preferably 1.5%. It is 20% or less and particularly preferably 2.0% or more and 10% or less.
  • the total light transmittance is preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, and even more preferably 85% or more.
  • the transparent laminate preferably has a diffuse transmittance of 1.5% to 60%, more preferably 1.7% to 55%, and more preferably 1.9% to 50%. Yes, even more preferably 2.0% or more and 45% or less.
  • the haze value and the total light transmittance are within the above ranges, the transparency is high and transmission visibility can be further improved. If the diffuse transmittance is within the above ranges, the incident light is efficiently diffused. Since the viewing angle can be further improved, the performance as a screen is excellent.
  • the haze value, total light transmittance and diffuse transmittance of the transparent laminate are JIS-K-7361 using a turbidimeter (manufactured by Nippon Denshoku Industries Co., Ltd., product number: NDH-5000). And can be measured according to JIS-K-7136.
  • the image clarity of the transparent laminate is preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, still more preferably 85% or more, and particularly preferably 90%. % Or more. If the image clarity of the transparent laminate is within the above range, the image seen through the transparent screen becomes extremely clear. In the present invention, the image clarity is a value of image definition (%) when measured with an optical comb width of 0.125 mm in accordance with JIS K7374.
  • the transparent laminate preferably has a reflected front luminous intensity of 1 or more and 60 or less, more preferably 1.5 or more and 50 or less, and further preferably 2.0 or more and 40 or less. Further, the transparent laminate has a value obtained by multiplying the transmitted front luminous intensity by 1000, preferably 0.5 or more, more preferably 1.0 or more, and even more preferably 2.0 or more and 50 or less. . If the value obtained by multiplying the reflective front luminous intensity and the transmitted front luminous intensity of the transparent laminate by 1000 is within the above range, the brightness of the reflected light is high and the performance as a reflective screen is excellent.
  • the reflected front luminous intensity and the transmitted reflected luminous intensity of the transparent laminate are values measured as follows.
  • the measurement was performed using a variable angle photometer (Nippon Denshoku Industries Co., Ltd., product number: GC5000L).
  • the incident angle of the light source was set to 45 degrees, and the reflected light intensity in the 0 degree direction when a standard white plate with a whiteness of 95.77 was placed on the measurement stage was set to 100.
  • the incident angle of the light source was set to 15 degrees, and the intensity of reflected light in the 0 degree direction was measured.
  • the measurement was performed using a variable angle photometer (Nippon Denshoku Industries Co., Ltd., product number: GC5000L).
  • the incident angle of the light source was set to 0 degree, and the transmitted light intensity in the 0 degree direction when nothing was placed on the measurement stage was set to 100.
  • the incident angle of the light source was set to 15 degrees, and the intensity of transmitted light in the 0 degree direction was measured.
  • the thickness of the transparent laminate is not particularly limited, but is preferably from 0.1 ⁇ m to 20 mm, more preferably from 0.5 ⁇ m to the viewpoint of use, productivity, handleability, and transportability. It is 15 mm, more preferably 1 ⁇ m to 10 mm.
  • the “transparent laminate” includes so-called films, sheets, coatings formed by coating on a substrate, and moldings of various thicknesses such as plates (plate-like moldings). .
  • the transparent light scattering layer includes a binder and substantially spherical fine particles. By using the following substantially spherical fine particles, light can be scattered and reflected anisotropically in the transparent light scattering layer, and the light utilization efficiency can be enhanced.
  • the thickness of the transparent light scattering layer is not particularly limited, but is preferably 0.1 ⁇ m to 20 mm, more preferably 0.2 ⁇ m to 20 mm from the viewpoints of application, productivity, handleability, and transportability. It is 15 mm, more preferably 1 ⁇ m to 10 mm.
  • the transparent light scattering layer may be a single layer, or two or more layers may be laminated by coating or the like, or two or more transparent light scattering layers may be bonded together with an adhesive or the like.
  • binder As the binder for forming the transparent light scattering layer, it is preferable to use an organic binder or inorganic binder with high transparency in order to obtain a transparent laminate with high transparency.
  • organic binder having high transparency a resin, for example, a thermoplastic resin, a self-crosslinking resin such as a thermosetting resin and an ionizing radiation curable resin, or the like can be used.
  • thermoplastic resins examples include acrylic resins, polyester resins, polyolefin resins, vinyl resins, polycarbonate resins, and polystyrene resins.
  • polymethyl methacrylate resin, polyethylene terephthalate resin, polyethylene naphthalate resin, polypropylene resin, cycloolefin resin, cellulose acetate propionate resin, polyvinyl butyral resin, polycarbonate resin, nitrocellulose resin, and polystyrene resin should be used. Is more preferable. These resins can be used alone or in combination of two or more.
  • Examples of highly transparent ionizing radiation curable resins include acrylic, urethane, acrylic urethane, epoxy, and silicone resins.
  • those having an acrylate-based functional group such as relatively low molecular weight polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, many Monofunctional monomers such as (meth) allylate oligomers or prepolymers of polyfunctional compounds such as monohydric alcohols, and reactive diluents such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone And polyfunctional monomers such as polymethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, trip
  • the ionizing radiation curable resin may be mixed with a thermoplastic resin and a solvent.
  • Commercially available products can be used as the ionizing radiation curable resin, for example, urethane acrylate type UV curable resin (trade name: Unidic V-4018) manufactured by DIC Corporation.
  • thermosetting resins examples include phenolic resins, epoxy resins, silicone resins, melamine resins, urethane resins, urea resins, and the like. Among these, epoxy resins and silicone resins are preferable.
  • Examples of the highly transparent inorganic binder include water glass, a glass material having a low softening point, and a sol-gel material.
  • Water glass refers to a concentrated aqueous solution of alkali silicate, and sodium is usually included as an alkali metal.
  • a typical water glass can be represented by Na 2 O.nSiO 2 (n: any positive number), and as a commercial product, sodium silicate manufactured by Fuji Chemical Co., Ltd. can be used.
  • the glass material having a low softening point is a glass having a softening temperature of preferably 150 to 620 ° C., more preferably a softening temperature of 200 to 600 ° C., and most preferably a softening temperature of 250 to 550. It is in the range of ° C.
  • a PbO—B 2 O 3 system, a PbO—B 2 O 3 —SiO 2 system, a PbO—ZnO—B 2 O 3 system a mixture containing an acid component and a metal chloride is heat-treated.
  • the lead-free low softening point glass etc. which are obtained by this can be mentioned.
  • a solvent, a high boiling point organic solvent, and the like can be mixed with the low softening point glass material.
  • the sol-gel material is a group of compounds that are cured by hydrolysis polycondensation by the action of heat, light, catalyst, and the like.
  • metal alkoxide metal alcoholate
  • metal chelate compound metal halide
  • liquid glass spin-on glass
  • reaction product thereof which may contain a catalyst for promoting curing.
  • photoreactive functional group such as an acryl group
  • the cured sol-gel material refers to a state in which the polymerization reaction of the sol-gel material has sufficiently progressed.
  • the sol-gel material is chemically bonded to the surface of the inorganic substrate in the course of the polymerization reaction and strongly adheres. Therefore, a stable cured product layer can be formed by using a cured body of a sol-gel material as the cured product layer.
  • a metal alkoxide is a compound group obtained by reacting an arbitrary metal species with water or an organic solvent using a hydrolysis catalyst or the like.
  • the metal species of the metal alkoxide include silicon, titanium, aluminum, germanium, boron, zirconium, tungsten, sodium, potassium, lithium, magnesium, tin and the like.
  • metal alkoxides whose metal species is silicon include dimethyldiethoxysilane, diphenyldiethoxysilane, phenyltriethoxysilane, methyltriethoxysilane (MTES), vinyltriethoxysilane, p-styryltriethoxysilane, methylphenyldioxysilane.
  • a compound group in which the ethoxy group of these compound groups is replaced by a methoxy group, a propyl group, an isopropyl group, a hydroxy group, or the like a compound group in which the ethoxy group of these compound groups is replaced by a methoxy group, a propyl group, an isopropyl group, a hydroxy group, or the like.
  • TEOS triethoxysilane
  • TMOS tetramethoxysilane
  • solvent used inorganic binders
  • the solvent is not limited to an organic solvent, and a solvent used in a general coating composition can be used.
  • hydrophilic solvents such as water can be used.
  • the binder of this invention is a liquid, it does not need to contain a solvent.
  • the solvent according to the present invention include, for example, alcohols such as methanol, ethanol, isopropyl alcohol (IPA), n-propanol, butanol, 2-butanol, ethylene glycol, propylene glycol, hexane, heptane, octane, decane, Aliphatic hydrocarbons such as cyclohexane, aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene and tetramethylbenzene, ethers such as diethyl ether, tetrahydrofuran and dioxane, acetone, methyl ethyl ketone, isophorone, cyclohexanone and cyclopentanone , Ketones such as N-methyl-2-pyrrolidone, ethers such as butoxyethyl ether, hexyloxyethyl alcohol, methoxy-2-propanol and
  • the substantially spherical fine particles may contain true spherical fine particles, or may contain spherical fine particles having irregularities and protrusions.
  • Refractive index n 1 and the refractive index n 2 of the substantially spherical fine particles of the binder the following equation (1):
  • the refractive index of the binder and the substantially spherical fine particles that form the transparent light scattering layer satisfy the above formula, so that light is anisotropically scattered in the transparent light scattering layer, improving the viewing angle and improving the light utilization efficiency. Can be made.
  • the substantially spherical fine particles may have a high refractive index or may have a low refractive index.
  • the refractive index n 2 is preferably 1.80 to 3.55, more preferably 1.9 to 3.3, and further preferably 2.0 to 3.5.
  • examples of the organic substantially spherical fine particles having a low refractive index include acrylic particles and polystyrene particles. These substantially spherical fine particles can be used singly or in combination of two or more.
  • the median diameter of the primary particles of the substantially spherical fine particles is preferably 0.1 to 100 nm, more preferably 0.2 to 70 nm, and still more preferably 0.5 to 50 nm.
  • the median diameter of the primary particles of substantially spherical fine particles is within the above range, when used as a transparent sheet, a sufficient diffusion effect of projected light can be obtained without impairing transmission visibility, so that the transparent screen is clear. Video can be projected.
  • the median diameter (D 50 ) of primary particles of substantially spherical fine particles is measured by a dynamic light scattering method using a particle size distribution analyzer (trade name: DLS-8000, manufactured by Otsuka Electronics Co., Ltd.). The particle size distribution can be obtained.
  • the content of the substantially spherical fine particles can be appropriately adjusted according to the thickness of the transparent light scattering layer and the refractive index of the fine particles.
  • the content of the fine particles in the transparent light scattering layer is preferably 0.0001 to 2.0% by mass, more preferably 0.001 to 1.0% by mass, and still more preferably 0% with respect to the binder. 0.005 to 0.5% by mass, and still more preferably 0.01 to 0.3% by mass. If the content of substantially spherical fine particles in the transparent light scattering layer is within the above range, the projection light emitted from the image projection device is sufficiently diffused anisotropically while ensuring the transparency of the transparent light scattering layer. Thereby, the visibility of diffused light and the visibility of transmitted light can be compatible.
  • the transparent light reflecting layer includes a binder and glittering flaky fine particles.
  • the viewing angle can be improved by anisotropically scattering and reflecting light within the transparent light reflecting layer.
  • the binder for forming the transparent light reflecting layer in order to obtain a transparent laminate having high transparency, it is preferable to use a binder having high transparency, and the same binder as that of the transparent light scattering layer can be used.
  • the thickness of the transparent light reflecting layer is not particularly limited, but is preferably from 0.1 ⁇ m to 20 mm, more preferably from 0.2 ⁇ m to the viewpoint of use, productivity, handleability, and transportability. It is 15 mm, more preferably 1 ⁇ m to 10 mm.
  • the transparent light reflecting layer may be a transparent laminate or a coating film formed on a substrate made of glass, resin, or the like.
  • the transparent light reflecting layer may be a single layer, or two or more layers may be laminated by coating or the like, or two or more transparent light reflecting layers may be bonded together with an adhesive or the like.
  • the regular reflectance of the glittering flaky fine particles is preferably 12.0% or more, more preferably 15.0% or more, and further preferably 20.0% or more and 80.0% or less.
  • the regular reflectance of the glittering flaky fine particles is a value measured as follows. (Regular reflectance) Measurement was performed using a spectrocolorimeter (manufactured by Konica Minolta Co., Ltd., product number: CM-3500d).
  • Bright flaky fine particles dispersed in an appropriate solvent were formed on a slide glass with a film thickness of 0.00.
  • the coated glass plate was coated and dried so that the thickness was 5 mm or more.
  • the glittering flaky fine particles depending on the type of the binder to be dispersed, for example, metallic fine particles such as aluminum, silver, platinum, gold, titanium, nickel, tin, tin-cobalt alloy, indium and chromium, or A metallic fine particle composed of titanium oxide, aluminum oxide and zinc sulfide, or a glittering material in which natural mica or synthetic mica is coated with a metal oxide can be used.
  • metallic fine particles such as aluminum, silver, platinum, gold, titanium, nickel, tin, tin-cobalt alloy, indium and chromium
  • the metal material used for the metal-based fine particles a metal having excellent projection light reflectivity is used.
  • the metal material has a reflectance R at a measurement wavelength of 550 nm of 50% or more, preferably 55% or more, more preferably 60% or more, and even more preferably 70% or more.
  • reflectance R refers to the reflectance when light is incident on a metal material from the vertical direction.
  • the reflectance R can be calculated by the following formula (1) using the refractive index n and the extinction coefficient k, which are intrinsic values of the metal material.
  • n and k are, for example, in Handbook of Optical Constants of Solids: Volume 1 (by Edward D.
  • the reflectance R (550) at a measurement wavelength of 550 nm can be calculated from n and k measured at a wavelength of 550 nm.
  • the metal material has an absolute value of the difference between the reflectance R (450) at the measurement wavelength 450 nm and the reflectance R (650) at the measurement wavelength 650 nm within 25% of the reflectance R (650) at the measurement wavelength 550 nm. Yes, preferably within 20%, more preferably within 15%, and even more preferably within 10%.
  • the real term ⁇ ′ of the dielectric constant is preferably ⁇ 60 to 0, and more preferably ⁇ 50 to ⁇ 10.
  • the real term ⁇ ′ of the dielectric constant can be calculated by the following formula (2) using the values of the refractive index n and the extinction coefficient k.
  • ⁇ ′ n 2 ⁇ k 2 formula (2)
  • the present invention is not bound by any theory, when the real term ⁇ ′ of the dielectric constant of the metal material satisfies the above numerical range, the following action occurs, and the transparent light scatterer is used as a reflective transparent screen. It is thought that it can be used suitably.
  • ⁇ ′ When ⁇ ′ is larger than 0, the vibration of free electrons in the metal-based fine particles cannot follow the vibration of light, so the vibration electric field due to light cannot be completely canceled, and the light enters the metal-based fine particles, It is transparent. As a result, only a part of the light is reflected on the surface of the metal-based fine particles, and the light reflectivity is lowered. In addition, an oxide or the like has low light reflectivity because there are few free electrons that can contribute to vibration.
  • any metal material satisfying the above-described reflectance R, preferably further satisfying the dielectric constant may be used, and a pure metal or an alloy can also be used.
  • the pure metal is preferably selected from the group consisting of aluminum, silver, platinum, titanium, nickel, and chromium.
  • the metal-based fine particles fine particles made of these metal materials, or fine particles obtained by coating these metal materials with resin, glass, natural mica, or synthetic mica can be used.
  • the shape of the metal-based fine particles is not particularly limited, and flaky fine particles, substantially spherical fine particles, and the like can be used.
  • the refractive index n and extinction coefficient k at each measurement wavelength are summarized in Table 1, and the reflectances R and ⁇ ′ calculated using the values are summarized in Table 2.
  • the glittering flaky fine particles preferably have an average primary particle diameter of 0.01 to 200 ⁇ m, more preferably 0.01 to 100 ⁇ m, still more preferably 0.05 to 80 ⁇ m, and still more preferably 0.1 to 50 ⁇ m, particularly Preferably, it is 0.5 to 30 ⁇ m.
  • the average diameter and average aspect ratio of the glittering flaky fine particles are within the above ranges, a sufficient scattering effect of the projection light can be obtained without impairing transmission visibility when the transparent laminate is used for a transparent screen. Thus, a clear image can be projected.
  • the average diameter of the glittering flaky fine particles was measured using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, product number: SALD-2300). The average aspect ratio was calculated from an SEM (trade name: SU-1500, manufactured by Hitachi High-Technologies Corporation) image.
  • glittering flaky fine particles commercially available ones may be used.
  • aluminum powder manufactured by Daiwa Metal Powder Industry Co., Ltd. can be suitably used.
  • the content of the glittering flaky fine particles in the transparent light reflecting layer can be appropriately adjusted according to the regular reflectance of the glittering flaky fine particles, and is preferably 0.0001 to 5.0 mass with respect to the binder. %, Preferably 0.0005 to 3.0 mass%, more preferably 0.001 to 1.0 mass%.
  • Projecting light is produced by anisotropically scattering and reflecting the projection light emitted from the light source by dispersing the glittering flaky fine particles in the binder at a low concentration within the above range to form a transparent light reflection layer. And the visibility of transmitted light can be improved.
  • An adhesion layer is a layer for sticking a transparent laminated body to a support body.
  • the pressure-sensitive adhesive layer is preferably formed using a pressure-sensitive adhesive composition that does not impair the transmission visibility and desired optical properties of the transparent laminate.
  • the pressure-sensitive adhesive composition include natural rubber, synthetic rubber, acrylic resin, polyvinyl ether resin, urethane resin, and silicone resin.
  • synthetic rubbers include styrene-butadiene rubber, acrylonitrile-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, styrene-ethylene-butylene block.
  • a copolymer is mentioned.
  • Specific examples of the silicone resin system include dimethylpolysiloxane.
  • the acrylic resin pressure-sensitive adhesive is a polymer containing at least a (meth) acrylic acid alkyl ester monomer. Generally, it is a copolymer of a (meth) acrylic acid alkyl ester monomer having an alkyl group having about 1 to 18 carbon atoms and a monomer having a carboxyl group.
  • (meth) acrylic acid means acrylic acid and / or methacrylic acid.
  • Examples of (meth) acrylic acid alkyl ester monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, sec-propyl (meth) acrylate, (meth) acrylic acid n-butyl, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) acrylic acid Examples include n-octyl, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, undecyl (meth) acrylate, and lauryl (meth) acrylate.
  • the (meth) acrylic acid alkyl ester is usually copolymerized in an acrylic adhesive at a ratio of 30
  • Examples of the monomer having a carboxyl group that forms the acrylic resin pressure-sensitive adhesive include monomers containing a carboxyl group such as (meth) acrylic acid, itaconic acid, crotonic acid, maleic acid, monobutyl maleate and ⁇ -carboxyethyl acrylate. Can be mentioned.
  • the acrylic resin pressure-sensitive adhesive may be copolymerized with a monomer having another functional group within a range not impairing the characteristics of the acrylic resin pressure-sensitive adhesive.
  • monomers having other functional groups include monomers containing hydroxyl groups such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate and allyl alcohol; (meth) acrylamide, N-methyl Monomers containing amide groups such as (meth) acrylamide and N-ethyl (meth) acrylamide; Monomers containing amide groups and methylol groups such as N-methylol (meth) acrylamide and dimethylol (meth) acrylamide; Monomers having functional groups such as amino group-containing monomers such as meth) acrylate, dimethylaminoethyl (meth) acrylate, and vinylpyridine; epoxy group-containing monomers such as allyl glycidyl ether and (meth) acrylic acid glycid
  • fluorine-substituted (meth) acrylic acid alkyl ester, (meth) acrylonitrile and the like, vinyl group-containing aromatic compounds such as styrene and methylstyrene, vinyl acetate, and vinyl halide compounds can be used.
  • adhesives such as SK Dyne 2094, SK Dyne 2147, SK Dyne 1811L, SK Dyne 1442, SK Dyne 1435, and SK Dyne 1415 (above, manufactured by Soken Chemical Co., Ltd.), Olivain EG-655, Olivevine BPS5896 (above, manufactured by Toyo Ink Co., Ltd.), etc. (above, trade name) can be suitably used.
  • the antireflection layer is a layer for preventing reflection on the surface of the transparent laminate and reflection from external light.
  • the antireflection layer may be laminated only on one side on the viewer side or the opposite side of the transparent laminate, or may be laminated on both sides. In particular, when used as a reflective screen, it is preferably laminated on the viewer side.
  • the antireflection layer is preferably formed using a resin that does not impair the transmission visibility and desired optical characteristics of the transparent laminate.
  • a resin curable by ultraviolet rays / electron beams that is, an ionizing radiation curable resin, a mixture of an ionizing radiation curable resin and a thermoplastic resin and a solvent, and a thermosetting resin are used.
  • ionizing radiation curable resins are particularly preferable.
  • the method for forming the antireflection layer is not particularly limited, but is a method of pasting a coating film, a method of dry coating directly on a film substrate by vapor deposition or sputtering, gravure coating, micro gravure coating, bar coating, slide die coating. Methods such as wet coating such as coating, slot die coating, and dip coating can be used.
  • the manufacturing method of the transparent laminated body by this invention includes the process of forming a transparent light-scattering layer, and the formation process of the transparent light reflection layer containing a lamination process.
  • the steps of forming the transparent light scattering layer and the transparent light reflecting layer include an extrusion molding method comprising a kneading step and a film forming step, a coextrusion molding method comprising a kneading step, a film forming step and a laminating step, a cast film forming method, and a gravure coating.
  • an extrusion molding method, an injection molding method, and a coating method can be suitably used because of the wide range of film thickness that can be formed by a known method.
  • each process of the manufacturing method using the extrusion molding method will be described in detail.
  • the kneading step is a step of forming a transparent light scattering layer using a kneading extruder.
  • a single-screw or twin-screw kneading extruder can be used as the kneading extruder.
  • twin-screw kneading extruder the average value over the entire screw length of the twin-screw kneading extruder is preferably 3 to 1800 KPa, More preferably, the above resin and fine particles are kneaded while applying a shearing stress of 6 to 1400 KPa to obtain a resin composition.
  • the fine particles can be sufficiently dispersed in the resin.
  • the shear stress is 3 KPa or more, the dispersion uniformity of the fine particles can be further improved, and if it is 1800 KPa or less, decomposition of the resin is prevented and bubbles are prevented from being mixed in the transparent light scattering layer. be able to.
  • the shear stress can be set in a desired range by adjusting the twin-screw kneading extruder.
  • a resin composition obtained by adding a resin (master batch) to which fine particles have been added in advance and a resin to which fine particles have not been added is kneaded using a twin-screw kneading extruder to obtain a resin composition. Also good.
  • a transparent light scattering layer may be produced from a masterbatch obtained by preparing a resin (masterbatch) to which fine particles have been added in advance using a single screw kneading extruder. You may add the dispersing agent generally known at the time of preparation.
  • additives may be added to the resin composition as long as the transmission visibility and desired optical performance of the transparent laminate are not impaired.
  • the additive include an antioxidant, a lubricant, an ultraviolet absorber, a compatibilizer, a nucleating agent, and a stabilizer.
  • the resin and the fine particles are as described above.
  • the twin-screw kneading extruder used in the kneading process is one in which two screws are inserted into a cylinder, and is configured by combining screw elements.
  • a flight screw including at least a conveying element and a kneading element can be suitably used.
  • the kneading element preferably contains at least one selected from the group consisting of a kneading element, a mixing element, and a rotary element.
  • the film forming step is a step of forming a film of the resin composition obtained in the kneading step.
  • the film forming method is not particularly limited, and a transparent laminate composed of the resin composition can be formed by a conventionally known method.
  • the resin composition obtained in the kneading step is supplied to a melt extruder heated to a temperature equal to or higher than the melting point (Tm to Tm + 70 ° C.) to melt the resin composition.
  • a melt extruder a single screw kneading extruder, a twin screw kneading extruder, a vent extruder, a tandem extruder, or the like can be used depending on the purpose.
  • the molten resin composition is extruded into a sheet shape by a die such as a T die, and the extruded sheet material is rapidly cooled and solidified by a rotating cooling drum or the like to form a sheet-shaped molded body.
  • a die such as a T die
  • the resin composition obtained in the kneading process is directly extruded from a die in a molten state to form a sheet-like transparent light scattering layer. You can also.
  • the sheet-like transparent light scattering layer obtained by the film forming step may be further uniaxially or biaxially stretched by a conventionally known method.
  • the mechanical strength can be improved by stretching the transparent light scattering layer.
  • a lamination process is a process of laminating
  • the method for laminating the transparent light reflecting layer is not particularly limited and can be performed by a conventionally known method.
  • the transparent light reflecting layer is formed by an extrusion molding method consisting of a kneading step and a film forming step, a coextrusion molding method consisting of a kneading step, a film forming step and a laminating step, a cast film forming method, an injection molding method, a calendar molding method, a blow molding method. It may be laminated by bonding with a pressure-sensitive adhesive or the like molded by a known method such as a molding method, compression molding method, cell casting method, or may be directly formed on a transparent light scattering layer by a coating method. it can.
  • the transparent screen according to the present invention comprises the above transparent laminate.
  • a transparent screen may consist only of said transparent laminated body, and may further be equipped with support bodies, such as a transparent partition.
  • the transparent screen may be a flat surface, a curved surface, or an uneven surface.
  • the reflective screen refers to a screen on which an image can be viewed by providing a video projection device on the viewer side (the same side as the viewer with respect to the screen).
  • the position of the light source is on the viewer side relative to the screen.
  • a transparent screen has excellent visibility of the projection light by anisotropically reflecting the projection light emitted from the light source, and also has a wide viewing angle and high brightness, and excellent visibility of the transmitted light. Is.
  • the support is for supporting the transparent laminate.
  • the support may be any material that does not impair the transmission visibility and desired optical characteristics of the reflective screen. Examples thereof include a transparent partition, a glass window, a head-up display for a passenger car, and a wearable display.
  • the member for vehicles by the present invention comprises the above-mentioned transparent layered product or transparent screen.
  • the vehicle member may be composed of only the above-described transparent screen, or may be a laminate that further includes an antireflection layer or the like. Examples of the vehicle member include a windshield and a side glass. Since the vehicle member includes the transparent laminate or the transparent screen, a clear image can be displayed on the vehicle member without providing a separate screen.
  • the building member according to the present invention comprises the transparent laminate or the transparent screen.
  • the building member may be composed of only the above-described transparent screen, or may be a laminate further provided with an antireflection layer or the like. Examples of the building member include a window glass of a house, a glass wall of a convenience store, a road surface store, and the like.
  • a video projection system includes the above-described transparent laminated body or a reflective screen that can be seen through, and a video projection device.
  • the video projection apparatus is not particularly limited as long as it can project an image on a screen.
  • a commercially available front projector can be used.
  • FIG. 4 shows a schematic diagram of an embodiment of a video projection system according to the present invention.
  • the transparent screen 53 includes a transparent partition (support) 52 and a transparent laminate 51 on the viewer 54 side on the transparent partition 51.
  • the transparent laminate 51 may include an adhesive layer in order to stick to the transparent partition 52.
  • the video projection system includes a transparent screen 53 and a video projection device 55 installed on the same side (front side) as the viewer 54 with respect to the transparent partition 51.
  • the projection light 56 emitted from the image projection device 55 is incident from the front side of the transparent screen 53 and is anisotropically scattered and reflected by the transparent screen 53, so that the viewer 54 can visually recognize a clear image.
  • Reflected frontal light intensity Measured using a variable angle photometer (manufactured by Nippon Denshoku Industries Co., Ltd., product number: GC5000L).
  • the incident angle of the light source was set to 45 degrees, and the reflected light intensity in the 0 degree direction when a standard white plate with a whiteness of 95.77 was placed on the measurement stage was set to 100.
  • the incident angle of the light source was set to 15 degrees, and the intensity of reflected light in the 0 degree direction was measured.
  • Transmitted frontal light intensity Measured using a variable angle photometer (manufactured by Nippon Denshoku Industries Co., Ltd., product number: GC5000L).
  • the incident angle of the light source was set to 0 degree, and the transmitted light intensity in the 0 degree direction when nothing was placed on the measurement stage was set to 100.
  • the incident angle of the light source was set to 15 degrees, and the intensity of transmitted light in the 0 degree direction was measured.
  • the incident angle of the light source was set to 0 degree, and the transmitted light intensity in the 0 degree direction when nothing was placed on the measurement stage was set to 100.
  • the transmitted light intensity from ⁇ 85 degrees to +85 degrees was measured in steps of 1 degree with the incident angle of the light source kept at 0 degrees.
  • the viewing angle was defined as a range where the transmitted light intensity was 0.001 or more in the measurement range.
  • Regular reflectance Measured using a spectrocolorimeter manufactured by Konica Minolta, product number: CM-3500d.
  • the glittering flaky fine particles dispersed in an appropriate solvent water or methyl ethyl ketone
  • times with respect to the normal line of a glass surface was measured.
  • Image clarity Image clarity (%) measured using an image clarity measuring instrument (Suga Test Instruments Co., Ltd., product number: ICM-1T) in accordance with JIS K7374 with an optical comb width of 0.125 mm. The value of) was defined as image clarity. The larger the image sharpness value, the higher the image clarity, and the clearer the image seen through the transparent screen. (9) Screen performance The mobile LED mini projector PP-D1S manufactured by Onkyo Digital Solutions Co., Ltd. is located at a position 15cm away from the normal direction of the transparent laminate produced below as a transparent screen. Was used to project the image.
  • Example 1 Production of thermoplastic resin pellets to which fine particles have been added (hereinafter referred to as “pellet production process”)
  • PET polyethylene terephthalate
  • IP121B manufactured by Bell Polyester Products Co., Ltd.
  • flaky aluminum fine particles A average primary particle diameter 10 ⁇ m, aspect ratio 300, regular reflectance 62.86% is added as bright flaky fine particles.
  • a PET pellet for transparent light reflection layer in which flaky aluminum fine particles were uniformly adhered to the surface of the PET pellet was obtained.
  • ZrO 2 particles manufactured by Kanto Denka Kogyo Co., Ltd., primary particle median diameter 10 nm
  • a PET pellet for transparent light scattering layer in which ZrO 2 particles uniformly adhered to the surface of the PET pellet was obtained.
  • Second layer Preparation of transparent light reflecting layer
  • the obtained fine particle-added PET pellets for transparent light reflecting layer were put into a hopper of a screw type biaxial kneading extruder (trade name: KZW-30MG) manufactured by Technobel Co., Ltd.
  • a transparent light reflecting layer having a thickness of 30 ⁇ m was prepared.
  • the screw diameter of the screw type twin-screw kneading extruder was 20 mm, and the effective screw length (L / D) was 30.
  • a hanger coat type T-die was installed in the screw type twin-screw kneading extruder through an adapter.
  • the extrusion temperature was 270 ° C.
  • the screw rotation speed was 500 rpm
  • the shear stress was 300 KPa.
  • the used screw has a total length of 670 mm, including a mixing element between 160 mm and 185 mm from the hopper side of the screw, and a kneading element between 185 mm and 285 mm, and the other parts are flight It was a shape.
  • Second layer Preparation of transparent light scattering layer A transparent layer having a thickness of 30 ⁇ m was obtained in the same manner as in the first layer, except that the transparent light reflecting layer fine particle-added PET pellet was changed to a transparent light scattering layer fine particle-added PET pellet. A light scattering layer (second layer) was prepared.
  • Third layer Preparation of transparent light reflection layer A transparent light reflection layer (third layer) having a thickness of 30 ⁇ m was prepared in the same manner as in the first layer.
  • Example 2 In the (1) pellet preparation step of Example 1, flaky aluminum fine particles B (average primary particle diameter of 7 ⁇ m, aspect ratio of 40, regular reflectance of 24.6%) as glittering flaky fine particles were 0 with respect to PET pellets.
  • a transparent light reflecting layer (third layer) was produced in the same manner as in Example 1 except that .0085% by mass was added.
  • a transparent laminate was produced in the same manner as in Example 1 except that the obtained third layer was used.
  • the haze value was 7.6%
  • the diffuse transmittance was 6.5%
  • the total light transmittance was 85. .3% and had high transparency.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 1.51, and it was found that the transmission front luminous intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 3.2, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 24 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 86%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the video very clearly.
  • Example 3 The transparent light reflecting layer (first and third layers) having a film thickness of 30 ⁇ m was obtained in the same manner as in Example 1 except that the flaky aluminum fine particles A were changed to 0.0005 mass% in the (1) pellet manufacturing step of Example 1. Layer). Further, as a substantially spherical fine particle, a transparent light-scattering layer (second film) having a thickness of 30 ⁇ m was prepared in the same manner as in Example 1 except that 0.05% by mass of titanium oxide (TiO 2 ) particles were added to the PET pellets. Layer). A transparent laminate was produced in the same manner as in Example 1 except that the obtained first to third layers were used.
  • the haze value was 3.9%
  • the diffuse transmittance was 3.4%
  • the total light transmittance was 87. It was 2% and had sufficient transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a variable angle photometer was 1.01, and it was found that the transmission front light intensity ( ⁇ 1000) was excellent.
  • the reflected front light intensity measured with a goniophotometer was 2.1, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 20 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 87%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 4 A transparent light reflecting layer (first layer and third layer) having a film thickness of 30 ⁇ m in the same manner as in Example 1 except that the flaky aluminum fine particles A were changed to 0.042% by mass in the (1) pellet preparation step of Example 1. ) was produced.
  • a transparent laminate was produced in the same manner as in Example 1 except that the obtained first layer and third layer were used.
  • the haze value was 11.2%
  • the diffuse transmittance was 9.1%
  • the total light transmittance was 81. It was 0.5% and had high transparency.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 2.80, and it was found that the transmission front luminous intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 12.2, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 16 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 86%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the video very clearly.
  • Example 5 Transparent light reflection in the same manner as in Example 1 except that 0.0085% by mass of flaky aluminum fine particles B as bright flaky fine particles was added to the PET pellets in the (1) pellet preparation step of Example 1.
  • Layers (first layer and third layer) were prepared.
  • a transparent laminate was produced in the same manner as in Example 1 except that the obtained first layer and third layer were used.
  • the haze value was 7.6%
  • the diffuse transmittance was 6.4%
  • the total light transmittance was 84. It was 2% and had high transparency.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 1.83, and it was found that the transmission front luminous intensity was excellent.
  • the reflected front luminous intensity measured with a goniophotometer was 1.8, indicating that the reflected front luminous intensity is excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 21 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 85%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 6 In Example 1 (1) Pellet preparation step, the thickness of 30 ⁇ m was the same as Example 1 except that 0.014% by mass of flaky aluminum fine particles B as bright flaky fine particles was added to the PET pellets. A transparent light reflecting layer (first layer) was produced. Further, titanium oxide (TiO 2 ) -coated mica (trade name: Helios R10S, average diameter of primary particles 12 ⁇ m, aspect ratio 80, regular reflectance 16.5%) as glittering flaky fine particles. A transparent light reflecting layer (third layer) having a thickness of 30 ⁇ m was prepared in the same manner as in Example 1 except that 0.1% by mass was added. A transparent laminate was produced in the same manner as in Example 1 except that the obtained first layer and third layer were used.
  • the haze value was 7.6%
  • the diffuse transmittance was 6.6%
  • the total light transmittance was 86. It was 2% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 1.56, and it was found that the transmission front light intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 2.2, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 22 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 83%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 7 The same procedure as in Example 1 was conducted except that the transparent light reflecting layer (bright flaky fine particles: titanium oxide (TiO 2 ) -coated mica) having a thickness of 30 ⁇ m prepared in Example 6 was used as the first layer and the third layer. Thus, a transparent laminate was produced. When the produced transparent laminate was used as a transparent screen with the first layer facing the viewer side, the haze value was 7.0%, the diffuse transmittance was 6.1%, and the total light transmittance was 86. It was 0.7% and had high transparency. The transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 0.98, and it was found that the transmission front light intensity was excellent.
  • the transparent light reflecting layer green flaky fine particles: titanium oxide (TiO 2 ) -coated mica
  • the reflected front light intensity measured with a goniophotometer was 2.0, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 20 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 85%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 8 A thickness of 30 ⁇ m was obtained in the same manner as in Example 1 except that 1.00% by mass of acrylic particles (PMMA) was added to the PET pellets as substantially spherical fine particles in the pellet production step of Example 1 (1).
  • a transparent light scattering layer (second layer) was prepared.
  • a transparent laminate was produced in the same manner as in Example 3 except that the obtained second layer was used. When the produced transparent laminate was disposed so that the first layer was directed to the viewer side and used as a transparent screen, the haze value was 5.9%, the diffuse transmittance was 5.2%, and the total light transmittance was 88. It was 4% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 1.79, and it was found that the transmission front light intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 2.6, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 23 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 82%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 9 A transparent layer having a thickness of 30 ⁇ m was obtained in the same manner as in Example 1 except that the glittering flaky fine particles were not added in the (1) pellet preparation step of Example 1.
  • a transparent laminate was produced in the same manner as in Example 1 except that the obtained transparent layer was used as the first layer.
  • the haze value was 7.1%
  • the diffuse transmittance was 6.2%
  • the total light transmittance was 87. It was 1% and had high transparency.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 1.02, and it was found that the transmission front luminous intensity was excellent.
  • the reflected front brightness measured with a goniophotometer was 2.9, and it was found that the reflected front brightness was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 23 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 84%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 10 In Example 1 (1) pellet preparation step, instead of polyethylene terephthalate (PET) pellets as a thermoplastic resin, methacrylic resin (PMMA) (product name: Delpet 60N, manufactured by Asahi Kasei Corporation), glittering flaky fine particles In the same manner as in Example 1 except that 0.004% by mass of flaky aluminum fine particles C (average primary particle diameter 1 ⁇ m, aspect ratio 25, regular reflectance 26.8%) was added instead of flaky aluminum fine particles A. PMMA pellets (for transparent light reflecting layer) with flaky aluminum fine particles C adhered thereto were prepared, and a transparent light reflecting layer (first layer) having a thickness of 60 ⁇ m was obtained at an extrusion temperature of 250 ° C.
  • PMMA methacrylic resin
  • PET pellets for a transparent light scattering layer having ZrO 2 particles attached thereto were prepared in the same manner as in Example 1 except that ZrO 2 was changed to 0.03 mass% as substantially spherical fine particles, and the thickness was 30 ⁇ m.
  • a transparent light scattering layer (second layer) was prepared.
  • a transparent light reflecting layer (thickness 30 ⁇ m) was formed in the same manner as in Example 1 except that the amount of flaky aluminum fine particles A added was changed to 0.010% by mass.
  • a third layer was produced, and a transparent laminate was produced in the same manner as in Example 1.
  • the haze value was 9.2%
  • the diffuse transmittance was 7.7%
  • the total light transmittance was 83. It was 4% and had high transparency.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 1.23, and it was found that the transmission front luminous intensity was excellent.
  • the reflected front luminous intensity measured with a goniophotometer was 1.6, indicating that the reflected front luminous intensity is excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 18 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 87%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 11 In Example 1 (1) pellet preparation step, instead of the flaky aluminum fine particles A as brilliant flaky fine particles, flaky silver fine particles (average primary particle diameter 1 ⁇ m, aspect ratio 100, regular reflectance 32.8%). ) was added in the same manner as in Example 1 except that 0.50% by mass was added, and a PET pellet (for transparent light reflecting layer) having flaky silver fine particles adhered thereto was prepared. Layer). Further, PET pellets (for a transparent light scattering layer) having ZrO 2 particles attached thereto were prepared in the same manner as in Example 1 except that ZrO 2 was changed to 0.005% by mass as substantially spherical fine particles, and the thickness was 30 ⁇ m. A transparent light scattering layer (second layer) was prepared.
  • PET pellets to which flaky aluminum fine particles A adhered were the same as in Example 1 except that the amount of flaky aluminum fine particles A added was changed to 0.020 mass%.
  • a transparent light reflection layer (third layer) having a thickness of 30 ⁇ m was prepared, and a transparent laminate was prepared in the same manner as in Example 1.
  • the haze value was 24.3%
  • the diffuse transmittance was 15.6%
  • the total light transmittance was 64. It was 2% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 5.34, and it was found that the transmission front light intensity was excellent.
  • the reflected front luminous intensity measured with a goniophotometer was 18.5, and it was found that the reflected front luminous intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 29 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 75%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the video very clearly.
  • Example 12 In the (1) pellet preparation step of Example 1, instead of the flaky aluminum fine particles A as the brilliant flaky fine particles, the flaky aluminum fine particles D (average primary particle diameter 120 ⁇ m, aspect ratio 38, regular reflectance 25.5). %) was prepared in the same manner as in Example 1 except that 0.01% by mass was added, and PET pellets (for a transparent light reflecting layer) having flaky silver fine particles adhered thereto were prepared. 1 layer) was obtained. Further, a transparent light scattering layer (second layer) having a thickness of 30 ⁇ m was produced in the same manner as in Example 1.
  • Example 1 a thickness of 30 ⁇ m was obtained in the same manner as in Example 1 except that the flaky aluminum fine particle C was changed to 0.004 mass% instead of the flaky aluminum fine particle A.
  • a transparent light reflection layer (third layer) was prepared, and a transparent laminate was prepared.
  • the produced transparent laminate was used as a transparent screen with the first layer facing the viewer side, the haze value was 13.1%, the diffuse transmittance was 9.4%, and the total light transmittance was 72. It was 1% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 3.40, and it was found that the transmission front light intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 4.3, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 22 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 71%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the video very clearly.
  • Example 13 A transparent layer (first layer) having a thickness of 30 ⁇ m was formed in the same manner as in Example 10 except that the flaky aluminum fine particles C were not added as the glittering flaky fine particles in the (1) pellet preparation step of Example 10. Obtained. Further, a transparent light scattering layer (second layer) similar to that of Example 1 was produced. In addition, in the (1) pellet manufacturing step of Example 1, a thickness of 30 ⁇ m was obtained in the same manner as in Example 1 except that the flaky aluminum fine particles D were changed to 0.01 mass% instead of the flaky aluminum fine particles A. A transparent light reflection layer (third layer) was prepared, and a transparent laminate was prepared.
  • the haze value was 10.9%
  • the diffuse transmittance was 7.8%
  • the total light transmittance was 77. It was 0.6% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 2.41, and it was found that the transmission front light intensity was excellent.
  • the reflected front light intensity measured with a goniophotometer was 3.8, and it was found that the reflected front light intensity was excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 23 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 83%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the image clearly.
  • Example 14 Using commercially available urethane acrylate type UV curable resin (DIC Co., Ltd. Unidic V-4018, diluted butyl acetate and isopropyl alcohol) as a binder, aluminum fine particles A as glittering flaky fine particles with respect to non-volatile content weight Dispersion A was prepared by adding 0.015% by mass. Furthermore, 5 parts by weight of a photopolymerization initiator (manufactured by BASF Japan Ltd., Irgacure 184) was added to 100 parts by weight of this dispersion to obtain a dispersion having photocurability.
  • a photopolymerization initiator manufactured by BASF Japan Ltd., Irgacure 184
  • the obtained dispersion was applied to a biaxially stretched polyester film having a thickness of 100 ⁇ m (manufactured by Toyobo Co., Ltd., Cosmo Shine A4100) using a bar coater so that the film thickness after drying was 20 ⁇ m.
  • a transparent light reflecting layer (first layer) was produced by irradiating with ultraviolet rays.
  • ZrO 2 particles as substantially spherical fine particles were added to a commercially available urethane acrylate type UV curable resin (Unidic V-4018 manufactured by DIC Corporation) with respect to the nonvolatile content weight in the urethane acrylate type UV curable resin.
  • Dispersion B was prepared by adding .25% by mass. Furthermore, 5 parts by weight of a photopolymerization initiator (manufactured by BASF Japan Ltd., Irgacure 184) was added to 100 parts by weight of this dispersion to obtain a dispersion having photocurability. The obtained dispersion was applied to the transparent light reflection layer (first layer) using a bar coater so that the film thickness after drying was 20 ⁇ m, and dried for 5 minutes with a hot air dryer at 70 ° C. A transparent light scattering layer (second layer) was laminated by irradiating with ultraviolet rays.
  • a photopolymerization initiator manufactured by BASF Japan Ltd., Irgacure 184
  • dispersion A was spray-coated on the transparent light scattering layer (second layer) with an air brush so that the coating thickness after drying was 20 ⁇ m, and dried with a hot air dryer at 70 ° C. for 5 minutes.
  • the transparent light reflecting layer (third layer) was laminated by irradiating ultraviolet rays to obtain a transparent laminate.
  • the haze value was 8.2%
  • the diffuse transmittance was 6.8%
  • the total light transmittance was 82. It was 0.7% and had high transparency.
  • the transmission front light intensity ( ⁇ 1000) measured with a goniophotometer was 1.85, and it was found that the transmission front light intensity was excellent.
  • the reflected front luminous intensity measured with a goniophotometer was 5.0, indicating that the reflected front luminous intensity is excellent.
  • the viewing angle measured with a goniophotometer was ⁇ 20 degrees, and it was found that the viewing angle characteristics were excellent.
  • the image clarity was 83%, and the image seen through the transparent screen was clear. Moreover, as a result of visually evaluating the visibility, it was possible to visually recognize the video very clearly.
  • Example 1 A transparent laminate was produced in the same manner as in Example 1 except that the transparent layer produced in Example 9 was used as the second layer and the third layer.
  • the haze value was 2.5%
  • the diffuse transmittance was 2.2%
  • the total light transmittance was 86.0%.
  • the transmission front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 0.42, indicating that the transmission front luminous intensity was inferior.
  • the reflected front brightness measured with a goniophotometer was 0.8, indicating that the reflected front brightness was inferior.
  • the viewing angle measured with a goniophotometer was ⁇ 10 degrees
  • the image clarity was 82%
  • the image seen through the transparent screen was clear. However, it was not possible to see a clear image.
  • Example 2 A transparent laminate was produced in the same manner as in Example 1 except that the transparent layer produced in Example 9 was used as the first layer and the third layer.
  • the haze value was 6.5%
  • the diffuse transmittance was 5.8%
  • the total light transmittance was 88. .5%.
  • the transmitted front luminous intensity ( ⁇ 1000) measured with a goniophotometer was 1.50
  • the reflected front luminous intensity was 0.5
  • both the transmitted light and reflected light were inferior.
  • the viewing angle measured with a goniophotometer was ⁇ 15 degrees
  • the image clarity was 85%.
  • the visually recognized video was unclear.
  • Table 6 shows the results of various physical properties and performance evaluation of the transparent laminates used in Examples and Comparative Examples.
  • Transparent reflector single layer structure
  • Binder 13 Fine particles 14, 28, 41, 56 Projected light (solid line) 15, 29, 42, 57 Scattered / reflected light (broken line) 16, 30, 43, 54
  • Viewer 21 Transparent laminate (two-layer structure) 23, 36 Spherical fine particles 24, 37 Transparent light scattering layer 26, 33, 39 Bright flaky fine particles 27, 34, 40
  • Transparent light reflective layer 31 Transparent laminate (three-layer structure)
  • Transparent laminate 53
  • Transparent partition (support) 53
  • Transparent screen 55 Video projector

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

[Problème] Fournir un corps stratifié transparent grâce auquel une visibilité de lumière de projection et une visibilité de lumière transmise peuvent être obtenues simultanément par réflexion anisotrope et diffuse de lumière de projection émise depuis une source de lumière lorsque le corps stratifié transparent est utilisé en tant qu'écran transparent. [Solution] La présente invention concerne un corps stratifié transparent qui est pourvu d'une couche de diffusion de lumière transparente comprenant un liant et des microparticules sensiblement sphériques, et une couche de réflexion de lumière transparente comprenant un liant et des microparticules en forme d'écailles photoluminescentes sur au moins un côté de la couche de diffusion de lumière transparente.
PCT/JP2016/064330 2015-05-27 2016-05-13 Corps stratifié transparent, écran transparent pourvu de celui-ci, et système de projection d'image pourvu de celui-ci WO2016190137A1 (fr)

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Cited By (6)

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JP2019015783A (ja) * 2017-07-04 2019-01-31 富士フイルム株式会社 ヘッドアップディスプレイ
WO2019039163A1 (fr) * 2017-08-25 2019-02-28 セントラル硝子株式会社 Écran transparent, et système d'affichage
WO2020116431A1 (fr) * 2018-12-04 2020-06-11 Ｊｘｔｇエネルギー株式会社 Film de commande de réflexion de lumière à alignement de particules fines
WO2021039304A1 (fr) * 2019-08-30 2021-03-04 パナソニックＩｐマネジメント株式会社 Élément translucide et système de source de lumière
JP2021099514A (ja) * 2017-02-14 2021-07-01 大日本印刷株式会社 反射スクリーン、映像表示装置
WO2022134267A1 (fr) * 2020-12-22 2022-06-30 宁波激智科技股份有限公司 Écran de télévision laser capable de résoudre le problème du chatoiement, et procédé de préparation associé

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JPH10213851A (ja) * 1997-01-31 1998-08-11 Dainippon Printing Co Ltd 反射型映写スクリーン
JP2005107011A (ja) * 2003-09-29 2005-04-21 Daicel Chem Ind Ltd 反射スクリーン、それを用いた表示方法および表示装置

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JPH10213851A (ja) * 1997-01-31 1998-08-11 Dainippon Printing Co Ltd 反射型映写スクリーン
JP2005107011A (ja) * 2003-09-29 2005-04-21 Daicel Chem Ind Ltd 反射スクリーン、それを用いた表示方法および表示装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021099514A (ja) * 2017-02-14 2021-07-01 大日本印刷株式会社 反射スクリーン、映像表示装置
JP7036247B2 (ja) 2017-02-14 2022-03-15 大日本印刷株式会社 反射スクリーン、映像表示装置
JP2019015783A (ja) * 2017-07-04 2019-01-31 富士フイルム株式会社 ヘッドアップディスプレイ
WO2019039163A1 (fr) * 2017-08-25 2019-02-28 セントラル硝子株式会社 Écran transparent, et système d'affichage
WO2020116431A1 (fr) * 2018-12-04 2020-06-11 Ｊｘｔｇエネルギー株式会社 Film de commande de réflexion de lumière à alignement de particules fines
JP2020091368A (ja) * 2018-12-04 2020-06-11 Ｊｘｔｇエネルギー株式会社 微粒子配向光反射制御フィルム
WO2021039304A1 (fr) * 2019-08-30 2021-03-04 パナソニックＩｐマネジメント株式会社 Élément translucide et système de source de lumière
JPWO2021039304A1 (fr) * 2019-08-30 2021-03-04
JP7241323B2 (ja) 2019-08-30 2023-03-17 パナソニックＩｐマネジメント株式会社 透光性部材及び光源システム
WO2022134267A1 (fr) * 2020-12-22 2022-06-30 宁波激智科技股份有限公司 Écran de télévision laser capable de résoudre le problème du chatoiement, et procédé de préparation associé

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