WO2016088701A1 - Stratifié transparent, écran réfléchissant le comprenant, et dispositif de projection d'image les comprenant - Google Patents

Stratifié transparent, écran réfléchissant le comprenant, et dispositif de projection d'image les comprenant Download PDF

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Publication number
WO2016088701A1
WO2016088701A1 PCT/JP2015/083539 JP2015083539W WO2016088701A1 WO 2016088701 A1 WO2016088701 A1 WO 2016088701A1 JP 2015083539 W JP2015083539 W JP 2015083539W WO 2016088701 A1 WO2016088701 A1 WO 2016088701A1
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Prior art keywords
laminate
refractive index
resin
image
light
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PCT/JP2015/083539
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English (en)
Japanese (ja)
Inventor
彰 松尾
涼 西村
大直 田中
孝介 八牧
Original Assignee
Ｊｘ日鉱日石エネルギー株式会社
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Priority to JP2016562437A priority Critical patent/JP6707462B2/ja
Publication of WO2016088701A1 publication Critical patent/WO2016088701A1/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
    • 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
    • G02B5/02—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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention provides a laminate capable of achieving both the visibility of projection light and the visibility of transmitted light by anisotropically scattering and reflecting the projection light emitted from the viewer side, a reflective screen including the laminate, and
  • the present invention relates to an image projection apparatus including the same.
  • a reflective screen including a periodic structure has been proposed (see Patent Document 2).
  • an anisotropic scattering film has been proposed which is made of a dielectric matrix containing at least metal nanorods and in which specific metal nanorods are oriented in a certain direction in the dielectric matrix (see Patent Document 3).
  • Patent Documents 1 to 3 have the following technical problems.
  • the reflection type screen described in Patent Document 1 the first optical film and the second optical film having a refractive index lower than the first optical film are alternately stacked to form three or more layers.
  • the reflection efficiency is reduced by the irregular reflection, and the transmittance is reduced.
  • the reflective screen described in Patent Document 2 includes a periodic structure, there is a technical problem that the transmittance decreases due to an increase in film thickness, the color reproducibility decreases due to interference fringes, and the manufacturing process becomes complicated.
  • the anisotropic scattering film described in Patent Document 3 has a technical problem that the total light transmittance is low and the transmission visibility is poor.
  • the present invention has been made in view of the above-mentioned technical problems, and the object thereof is excellent in visibility of projected light by anisotropically scattering and reflecting projected light emitted from the viewer side.
  • An object of the present invention is to provide a laminate having a wide corner and excellent visibility of transmitted light.
  • Another object of the present invention is to provide a see-through reflective screen provided with the laminate, and an image projection device provided with the laminate or the see-through reflective screen and a projection device.
  • the present invention does not require that the first optical film and the second optical film having a lower refractive index are alternately laminated.
  • the reflective screen here refers to a screen on which an image can be viewed by providing a projection device on the viewer side (that is, on the same side as the viewer with respect to the screen), as shown in FIG.
  • the present inventors have found that in order to solve the above technical problem, a result of intensive studies, the resin having a refractive index n 1, the light diffusing layer using the fine particles having a refractive index n 1 is different from the refractive index n 2 And the above-mentioned technical problem is solved by using a laminate in which a reflective layer is formed on a light diffusion layer using a material having a refractive index n 3 larger than the refractive index n 1. It was found that it can be suitably used for a screen. The present invention has been completed based on such findings.
  • a resin having a refractive index n 1, and a light diffusing layer comprising a particulate having a refractive index n 1 is different from the refractive index n 2,
  • a laminate comprising: is provided.
  • optical thickness of the reflecting layer represented by the product of the refractive index n 3 and the thickness d is 20 ⁇ 400 nm.
  • the difference between the refractive index n 1 and the refractive index n 2 is preferably 0.1 or more.
  • the primary particles of the fine particles have a median diameter of 0.1 to 50 nm and a maximum particle diameter of 10 to 500 nm.
  • the laminate preferably has a total light transmittance of 70% or more.
  • the laminate has a image clarity of 60% or more.
  • the refractive index n 3 is at least 1.8.
  • the reflective layer is at least one selected from the group consisting of titanium oxide, niobium oxide, cerium oxide, zirconium oxide, indium tin oxide, zinc oxide, tantalum oxide, zinc sulfide, and tin oxide. It is preferable to comprise.
  • the refractive index n 2 is smaller than the refractive index n 1 and the content of the fine particles is 0.001 to 14% by mass with respect to the resin.
  • the refractive index n 2 is larger than the refractive index n 1 and the content of the fine particles is 0.00015 to 3.0% by mass with respect to the resin.
  • the laminate is preferably for a reflective screen that can be seen through.
  • a reflective screen that includes the above laminate and can be seen through.
  • a vehicle member provided with the laminate or the see-through reflective screen.
  • a residential member provided with the laminate or the see-through reflective screen.
  • an image projecting device comprising the above laminate or the above-described reflective screen that can be seen through, and a projection device.
  • the laminate according to the present invention When the laminate according to the present invention is used as a reflective screen, the projected light emitted from the viewer side is anisotropically scattered and reflected without impairing the transmission visibility, so that the transparent screen can be clearly seen. It is possible to project a clear image and has an excellent viewing angle. That is, the laminate according to the present invention can achieve both the visibility of projection light and the visibility of transmitted light. Therefore, the laminated body by this invention can be used suitably as a transparent screen, and also can be used suitably for the member for vehicles, and the member for houses. The laminate according to the present invention can also be suitably used as a light guide plate used in an image display device, an image projection device, a scanner light source, and the like.
  • the laminate according to the present invention includes a light diffusion layer and a reflection layer.
  • the laminate according to the present invention is preferably transparent, and can be suitably used as a transparent screen laminate capable of being seen through.
  • the laminated body according to the present invention has excellent visibility of projection light by anisotropically reflecting reflected projection light emitted from the viewer side, wide viewing angle, high transparency, and visibility of transmitted light. It has excellent properties.
  • Such a laminate can be suitably used as a see-through reflective screen used for a head-up display, a wearable display, or the like.
  • the term “transparent” is sufficient as long as the transparency can be realized according to the application, and includes “translucent”.
  • FIG. 1 shows a schematic cross-sectional view in the thickness direction of an embodiment of a laminate according to the present invention.
  • the laminate 10 includes a light diffusion layer 11 in which fine particles 13 are dispersed in a resin 12 and a reflection layer 14 formed on the light diffusion layer 11.
  • the laminated body may have a two-layer configuration including the light diffusion layer 11 and the reflective layer 14, or may further include other layers such as a protective layer, a base material layer, an adhesive layer, and an antireflection layer. .
  • the laminate has a haze value of preferably 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% or more. 20% or less. Further, the laminate preferably has a total light transmittance of 70% or more, more preferably 75% or more, still more preferably 80% or more, and even more preferably 85% or more. When the haze value and the total light transmittance of the laminate are within the above ranges, the transparency is high and the transmission visibility can be further improved.
  • the haze value and total light transmittance of the reflection type screen laminate were measured using a turbidimeter (manufactured by Nippon Denshoku Industries Co., Ltd., product number: NDH-5000) and JIS-K-7361 and It can be measured according to JIS-K-7136.
  • the laminate has an image clarity of preferably 60% or more, more preferably 65% or more, still more preferably 70% or more, still more preferably 75% or more, and particularly preferably 80%. That's it. If the image clarity of the laminate is within the above range, the image seen through the transparent screen becomes very 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 laminated body has a reflected light intensity of preferably 3 or more and 60 or less, more preferably 4 or more and 50 or less, and further preferably 4.5 or more and 40 or less. Moreover, the said laminated body becomes like this.
  • the reflected luminous intensity improvement rate is 1.5 times or more, More preferably, it is 2 times or more, More preferably, it is 3 times or more and 50 times or less.
  • the reflected light intensity and the reflected light intensity improvement rate of the laminate are within the above ranges, the brightness of the reflected light is high and the performance as a reflective screen is excellent.
  • the reflected luminous intensity and the reflected luminous intensity improvement rate of the 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 corresponding to the projector light incident angle in the rear projection, and the intensity of reflected light in the 0 degree direction was measured.
  • the reflected luminous intensity was measured and calculated as an improvement magnification when the reflected luminous intensity of a laminate not provided with a reflective layer was set to 1.
  • the thickness of the laminate is not particularly limited, but is preferably 10 ⁇ m to 20 mm, more preferably 20 ⁇ m to 15 mm, from the viewpoints of use, productivity, handleability, and transportability.
  • the thickness is preferably 30 ⁇ m to 10 mm.
  • the “laminate” includes molded articles having various thicknesses such as a so-called film, sheet, and coating film formed by coating on a substrate, and a plate (plate-shaped molded article).
  • the light diffusion layer comprises a resin having a refractive index n 1, and fine particles having a refractive index n 1 is different from the refractive index n 2.
  • the difference between the refractive index n 1 and the refractive index n 2 is preferably 0.1 or more, more preferably 0.15 or more, and further preferably 0.2 or more and 1.5 or less. Since the refractive index of the resin forming the light diffusion layer is different from that of the fine particles, light can be scattered anisotropically in the light diffusion layer, and the viewing angle can be improved.
  • the thickness of the light diffusion layer is not particularly limited, but is preferably 0.1 ⁇ m to 20 mm, more preferably 0.2 ⁇ m to 15 mm, from the viewpoints of application, productivity, handleability, and transportability. More preferably, it is 1 ⁇ m to 10 mm, even more preferably 10 ⁇ m to 2 mm, and most preferably 50 ⁇ m to 1 mm.
  • the light diffusion layer may be a film or a coating film formed on a substrate made of glass or resin.
  • the light diffusion layer may have a single layer structure, or may have a multilayer structure in which two or more layers are laminated by coating or the like, or two or more layers are bonded together with an adhesive or the like.
  • the resin for forming the light diffusion layer it is preferable to use a highly transparent resin in order to obtain a highly transparent laminate.
  • Highly transparent resins include acrylic resins, acrylic urethane resins, polyester acrylate resins, polyurethane acrylate resins, epoxy acrylate resins, polyester resins, polyolefin resins, urethane resins, epoxy resins, and polycarbonate resins.
  • thermoplastic resin such as vinyl resins, polysulfone resins, and fluorine resins, thermosetting resins, ionizing radiation curable resins, and the like can be used.
  • a thermoplastic resin is preferable from the viewpoint of the moldability of the laminate, but is not particularly limited.
  • acrylic resins, polyester resins, polyolefin resins, vinyl resins, polycarbonate resins, and polystyrene resins are preferably used.
  • Polymethyl methacrylate resin polyethylene terephthalate resin, polyethylene naphthalate resin More preferably, polypropylene resin, cycloolefin polymer resin, cellulose acetate propionate resin, polyvinyl butyral resin, polycarbonate resin, and polystyrene resin are used. These resins can be used alone or in combination of two or more.
  • the ionizing radiation curable resin 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
  • polyfunctional monomers such as polymethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate Preferred are those containing a
  • the ionizing radiation curable resin may be mixed with a thermoplastic resin and a solvent.
  • thermosetting resins 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.
  • the fine particles forming the light diffusion layer an inorganic material or an organic material that can be atomized to a nano size can be suitably used.
  • the refractive index n 2 is preferably 1.80 to 3.55, more preferably 1.9 to 3.3, and still more preferably 2.0 to 3 0.0, and metal-based particles obtained by atomizing metal oxides, metal salts, pure metals, and the like can be used.
  • Examples of the pure metal include silver, gold, platinum, and palladium.
  • zirconium oxide particles, titanium oxide particles, cerium oxide particles, barium titanate particles, and silver particles are preferably used from the viewpoints of projection light scattering, particle aggregability, and production cost.
  • These inorganic fine particles can be used alone or in combination of two or more.
  • the refractive index n 2 is preferably 1.35 to 1.80, more preferably 1.4 to 1.75, and still more preferably 1.45.
  • organic fine particles having a low refractive index include acrylic particles and polystyrene particles.
  • the primary particles of the fine particles have a median diameter (D 50 ) of 0.1 to 50 nm, preferably 0.5 to 40 nm, more preferably 1 to 35 nm, still more preferably 1.5 to 30 nm, and 10 to 500 nm.
  • the maximum particle diameter is preferably 15 to 300 nm, more preferably 20 to 200 nm, and still more preferably 20 to 130 nm.
  • the median diameter (D 50 ) and the maximum particle diameter of the primary particles of the inorganic fine particles are determined using a particle size distribution measuring device (trade name: DLS-8000, manufactured by Otsuka Electronics Co., Ltd.) by a dynamic light scattering method. It can be determined from the particle size distribution measured by using.
  • the inorganic fine particles commercially available ones may be used.
  • the zirconium oxide particles SZR-W, SZR-CW, SZR-M, SZR-K and the like (above, manufactured by Sakai Chemical Industry Co., Ltd.) Product name) can be preferably used.
  • the content of the fine particles in the light diffusion layer can be appropriately adjusted according to the refractive index n 2 of the fine particles, and is preferably 0.00015 to 14% by mass with respect to the resin.
  • the content of fine particles in the light diffusion layer is preferably 0.001 to 14% by mass with respect to the resin. Yes, preferably 0.01 to 12% by mass, and more preferably 0.1 to 10% by mass.
  • the content of the fine particles in the light diffusion layer is preferably 0.00015-3.
  • the content of the inorganic fine particles in the light diffusion layer is within the above range, the projection light emitted from the viewer side is scattered and reflected anisotropically, thereby improving the visibility of the projection light and the visibility of the transmitted light. Can be improved.
  • the reflection layer is a layer for anisotropically scattering and reflecting the projection light emitted from the light source. Further, since the reflective layer can be seen through, the visibility of transmitted light is excellent.
  • the reflective layer has a refractive index n 3 greater than the refractive index n 1 of the resin of the light diffusion layer.
  • Refractive index n 3 of the reflective layer is preferably 1.8 or more, more preferably 1.8 to 3.0, more preferably 1.8 or more 2.6 or less.
  • the thickness of the reflective layer is preferably 5 to 130 nm, more preferably 10 to 100 nm, and still more preferably 15 to 90 nm. When the thickness of the reflective layer is within the above range, a highly transparent and reflective screen capable of being seen through can be provided.
  • the reflective layer has an optical film thickness (nd) represented by the product of the refractive index n 3 and the film thickness d, preferably 20 to 400 nm, more preferably 50 to 300 nm, and still more preferably 70 to 250 nm. And even more preferably 100 to 200 nm. If the optical film thickness of the reflective layer is within the above numerical range, the image can be clearly seen, there is no color change of the reflected image, and the color reproducibility is excellent.
  • nd optical film thickness represented by the product of the refractive index n 3 and the film thickness d
  • the reflective layer is formed using at least one material selected from the group consisting of titanium oxide, niobium oxide, cerium oxide, zirconium oxide, indium tin oxide, zinc oxide, tantalum oxide, zinc sulfide, and tin oxide. Is preferred. By using such a material, to achieve the refractive index n 3 of the above projection light emitted from the light source can be efficiently reflected.
  • the method for forming the reflective layer is not particularly limited, and can be performed by a conventionally known method.
  • the reflective layer can be formed by vapor deposition, sputtering, or coating.
  • the reflective layer may be directly formed on the light diffusion layer, or may be bonded to the light diffusion layer with an adhesive or the like after being formed on a substrate layer made of resin or glass.
  • a base material layer is a layer for supporting a laminated body, and can improve the intensity
  • the base material layer is preferably made of a highly transparent resin or glass that does not impair the transmission visibility and desired optical properties of the laminate.
  • a resin for example, a highly transparent resin similar to the above light diffusion layer can be used.
  • Acrylic resins acrylic urethane resins, polyester acrylate resins, polyurethane acrylate resins, epoxy acrylate resins, polyester resins, polyolefin resins, urethane resins, epoxy resins, polycarbonate resins, cellulose resins, Acetal resin, vinyl resin, polystyrene resin, polyamide resin, polyimide resin, melamine resin, phenol resin, silicone resin, polyarylate resin, polyvinyl alcohol resin, polyvinyl chloride resin, polysulfone resin Resins, thermoplastic resins such as fluorine resins, thermosetting resins, ionizing radiation curable resins, and the like can be suitably used.
  • seat which laminated
  • the thickness of the base material layer can be appropriately changed according to the material so that the strength is appropriate, and may be in the range of 10 to 1000 ⁇ m, for example.
  • the protective layer may be laminated on both the front side (viewer side) and the back side of the laminate or any one of them, and functions such as light resistance, scratch resistance, substrate adhesion and antifouling properties. It is a layer for giving.
  • the protective layer is preferably formed using a resin that does not impair the transmission visibility and desired optical properties of the laminate. Examples of the material for the protective layer include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, cellulose resins such as diacetyl cellulose and triacetyl cellulose, acrylic resins such as polymethyl methacrylate, polystyrene, acrylonitrile / styrene copolymers, and the like.
  • polystyrene resins such as (AS resin), polycarbonate resins, and the like.
  • polyolefin resins such as polyethylene, polypropylene, ethylene / propylene copolymers, olefin resins having cycloolefin or norbornene structures, vinyl chloride resins, amide resins such as nylon and aromatic polyamide, imide resins, Sulfone resin, polyether sulfone resin, polyether ether ketone resin, polyphenylene sulfide resin, vinyl alcohol resin, vinylidene chloride resin, vinyl butyral resin, arylate resin, polyoxymethylene resin, epoxy resin Or the blend of the said resin etc.
  • resin which forms a protective film examples include ionizing radiation curable resins such as acrylics, urethanes, acrylic urethanes, epoxies, and silicones, mixtures of thermoplastic resins and solvents in ionizing radiation curable resins, and thermosetting resins. .
  • the film forming component of the ionizing radiation curable resin composition is preferably one having an acrylate functional group, such as a relatively low molecular weight polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin, alkyd resin, Spiroacetal resin, polybutadiene resin, polythiol polyene resin, oligomers or prepolymers such as (meth) arylate of polyfunctional compounds such as polyhydric alcohols, and reactive diluents such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, Monofunctional and polyfunctional monomers such as methylstyrene and N-vinylpyrrolidone, such as polymethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate Of diethyl methacrylate, diethylene glycol di
  • acetophenones, benzophenones, Michler benzoyl benzoate, ⁇ -amyloxime ester, tetramethylchuram mono are used as photopolymerization initiators.
  • a mixture of sulfide, thioxanthone, n-butylamine, triethylamine, poly-n-butylphosphine, or the like as a photosensitizer can be used.
  • the ionizing radiation curable resin composition can be cured by a normal curing method, that is, by irradiation with electron beams or ultraviolet rays.
  • a normal curing method that is, by irradiation with electron beams or ultraviolet rays.
  • electron beam curing 50 to 50 emitted from various electron beam accelerators such as Cockloft Walton type, bandegraph type, resonant transformation type, insulated core transformer type, linear type, dynamitron type, high frequency type, etc.
  • An electron beam having an energy of 1000 KeV, preferably 100 to 300 KeV is used.
  • ultraviolet rays emitted from rays such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp, etc. Available.
  • the protective layer is formed by applying the coating liquid of the ionizing radiation (ultraviolet ray) radiation curable resin composition by a method such as spin coating, die coating, dip coating, bar coating, flow coating, roll coating, gravure coating, or the like. It can form by apply
  • a fine structure such as a concavo-convex structure, a prism structure, or a microlens structure can be provided on the surface of the protective layer according to the purpose.
  • An adhesion layer is a layer for sticking a 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 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 monomers containing amino groups such as meth) acrylate, dimethylaminoethyl (meth) acrylate and vinylpyridine; ⁇ ⁇ ⁇ ⁇ epoxy group-containing monomers such as allyl glycidyl ether and (meth)
  • 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.
  • the acrylic resin pressure-sensitive adhesive in addition to the monomer having another functional group as described above, another monomer having an ethylenic double bond can be used.
  • monomers having an ethylenic double bond include diesters of ⁇ , ⁇ -unsaturated dibasic acids such as dibutyl maleate, dioctyl maleate and dibutyl fumarate; vinyl esters such as vinyl oxalate and vinyl propionate; vinyl ether And vinyl aromatic compounds such as styrene, ⁇ -methylstyrene and vinyltoluene; (meth) acrylonitrile and the like.
  • a compound having two or more ethylenic double bonds may be used in combination.
  • examples of such compounds include divinylbenzene, diallyl malate, diallyl phthalate, ethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, methylene bis (meth) acrylamide, and the like.
  • monomers having an alkoxyalkyl chain can be used.
  • (meth) acrylic acid alkoxyalkyl esters include 2-methoxyethyl (meth) acrylate, methoxyethyl (meth) acrylate, 2-methoxypropyl (meth) acrylate, and 3-methoxypropyl (meth) acrylate.
  • the pressure-sensitive adhesive composition may be a homopolymer of (meth) acrylic acid alkyl ester monomer in addition to the above acrylic resin pressure-sensitive adhesive.
  • (meth) acrylic acid ester homopolymers include poly (meth) acrylate methyl, poly (meth) ethyl acrylate, poly (meth) acrylate propyl, poly (meth) acrylate butyl, poly (meth) Examples include octyl acrylate.
  • Copolymers containing two or more acrylate units include methyl (meth) acrylate- (meth) ethyl acrylate copolymer, methyl (meth) acrylate-butyl (meth) acrylate copolymer, ( Examples thereof include methyl (meth) acrylate- (meth) acrylic acid 2-hydroxyethyl copolymer, methyl (meth) acrylate- (meth) acrylic acid 2-hydroxy3-phenyloxypropyl copolymer, and the like.
  • Copolymers of (meth) acrylic acid esters and other functional monomers include (meth) methyl acrylate-styrene copolymers, (meth) methyl acrylate-ethylene copolymers, (meth) acrylic. Examples include methyl acid- (meth) acrylate 2-hydroxyethyl-styrene copolymer.
  • 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 laminate and reflection from outside light.
  • the antireflection layer may be laminated on the surface side (viewer side) of the laminate, or may be laminated on both surfaces. 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 properties of the laminate.
  • a resin curable by ultraviolet rays or an electron beam 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. Among these, 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 laminated body by this invention includes the process of forming a light-diffusion layer, and the process of forming the reflective layer containing a lamination process.
  • the step of forming the light diffusion layer is a known method such as offset printing, gravure printing, screen printing, inkjet printing, spray printing, spin coating, die coating, dip coating, bar coating, flow coating, roll coating, gravure coating, or the like.
  • a thin film of an appropriate thickness produced by the method, an injection molding method, an extrusion molding method comprising a kneading step and a film forming step, a calendar molding method, a blow molding method, a compression molding method, a cell casting method, a continuous casting method, etc.
  • the extrusion molding method can be suitably used because it can be molded by the method and has a wide range of film thickness that can be formed.
  • each process of a manufacturing method is explained in full detail.
  • the kneading step can be performed using an extruder such as a single-screw kneader or a twin-screw kneading extruder.
  • an extruder such as a single-screw kneader or a twin-screw kneading extruder.
  • the above resin and fine particles are kneaded while applying a shear stress of preferably 3 to 1800 KPa, more preferably 6 to 1400 KPa as an average value over the entire length of the screw.
  • a composition can be obtained. If the shear stress is within the above range, 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 light diffusion layer. Can do.
  • the shear stress can be set in a desired range by adjusting the twin-screw kneading extruder.
  • a resin (masterbatch) to which fine particles have been added in advance and a mixture of resin to which fine particles have not been added are kneaded using a single-screw kneading extruder or a twin-screw kneading extruder, A resin composition may be obtained.
  • additives may be added to the resin composition as long as the transmission visibility and desired optical performance of the reflective screen 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 film made 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 extruder, a twin screw extruder, a vent extruder, a tandem extruder, or the like can be used depending on the purpose.
  • the melted 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, thereby forming a film.
  • the resin composition obtained in the kneading process is directly extruded into a sheet shape with a die in a molten state, and a film-shaped light diffusion layer is formed. It can also be molded.
  • the film-shaped light diffusion layer obtained by the film forming step may be further uniaxially or biaxially stretched by a conventionally known method.
  • the strength of the light diffusion layer can be improved by stretching the light diffusion layer.
  • the laminating step is a step of further laminating a reflective layer on the film-shaped light diffusion layer obtained in the film forming step.
  • the method for laminating the reflective layer is not particularly limited, and can be performed by a conventionally known method.
  • the reflective layer can be formed by vapor deposition, sputtering, or coating.
  • a reflective screen according to the present invention comprises the above laminate.
  • the reflective screen may be composed only of the above-described laminated body, or may further include a support such as a transparent partition. When used as a reflective screen, it is preferable that the viewer visually recognizes an image from the light diffusion layer side of the laminate.
  • the reflective screen may be a flat surface, a curved surface, or an uneven surface.
  • the position of the light source is on the viewer side with respect to the screen.
  • a reflective screen has excellent visibility of projection light by anisotropically reflecting the projection light emitted from the viewer side, and has a wide viewing angle and excellent visibility of transmitted light. It is.
  • the support is for supporting the 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 vehicle member according to the present invention includes the above-described laminated body or a see-through reflective screen, and may further include an antireflection layer or the like.
  • Examples of the vehicle member include a windshield and a side glass.
  • the housing member according to the present invention includes the above-described laminated body or a reflective screen that can be seen through, and may further include an antireflection layer or the like.
  • Examples of the house member include a window glass of a house, a convenience store, a glass wall of a road surface store, and the like.
  • the housing member includes the above-described laminate or the see-through reflective screen, so that a clear image can be displayed on the housing member without providing a separate screen.
  • An image projection apparatus includes the above laminate or a reflective screen that can be seen through, and a projection apparatus.
  • the projection device is not particularly limited as long as it can project an image on a screen.
  • a commercially available front projector can be used.
  • FIG. 2 shows a schematic diagram of an embodiment of a reflective screen and an image projection apparatus according to the present invention.
  • the reflective screen 20 includes a support body (transparent partition) 21 and a laminated body 10 on the support body 21 so that a light diffusing layer and a reflective layer are arranged in this order from the viewer 22 side.
  • a support body transparent partition
  • a laminated body 10 on the support body 21 so that a light diffusing layer and a reflective layer are arranged in this order from the viewer 22 side.
  • the image projection apparatus includes a reflective screen 20 and a projection apparatus 23.
  • the projection device 23 is installed on the same side as the viewer 22 with respect to the transparent partition 21, and the projection light 24 emitted from the light source is anisotropically scattered and reflected by the reflective screen laminate 10, and the viewer reflects the reflected light. 25 can be visually recognized.
  • 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 corresponding to the projector light incident angle in the rear projection, and the intensity of reflected light in the 0 degree direction was measured.
  • (4) Reflective Layer Film Thickness of the reflective layer was measured by using SURFACE TEXTURE ANALYSIS SYSTEM Dektak 3030ST manufactured by SLOAN or DIGIMICRO MFC-101 manufactured by Nikon.
  • thermoplastic resin pellets to which inorganic fine particles were added Polyethylene terephthalate (PET) pellets (trade name: IP121B, manufactured by Bell Polyester Products Co., Ltd.) were prepared as thermoplastic resins.
  • PET Polyethylene terephthalate
  • IP121B manufactured by Bell Polyester Products Co., Ltd.
  • ZrO 2 zirconium oxide
  • the PET pellets in which ZrO 2 particles were uniformly adhered to the surface of the PET pellets were obtained by mixing in the above.
  • 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.
  • a light diffusion layer was prepared in the same manner as in Production 1 except that polyethylene naphthalate (PEN) pellets (manufactured by Teijin Ltd., trade name: Teonex TN-8065S) were used as the thermoplastic resin in (1) of Production Example 1. Produced.
  • PEN polyethylene naphthalate
  • a light diffusion layer was produced in the same manner as in Production 1 except that polycarbonate (PC) pellets (manufactured by Sumika Stylon Polycarbonate Co., Ltd., trade name: SD2201W) were used as the thermoplastic resin in Production Example 1 (1). .
  • PC polycarbonate
  • SD2201W trade name: SD2201W
  • Example 11 a light diffusion layer was produced in the same manner as in Production 1 except that polystyrene (PS) pellets (brand name HF77 manufactured by PS Japan Co., Ltd.) were used as the thermoplastic resin.
  • PS polystyrene
  • thermoplastic resin pellets to which inorganic fine particles were added Polyethylene terephthalate (PET) pellets (trade name: IP121B, manufactured by Bell Polyester Products Co., Ltd.) were prepared as thermoplastic resins.
  • PET Polyethylene terephthalate
  • ZrO 2 particles manufactured by Kanto Denka Kogyo Co., Ltd., primary particle median diameter 10 nm
  • a PET pellet having ZrO 2 particles uniformly adhered to the surface of the PET pellet was obtained.
  • ZrO 2 particles are obtained by putting the pellets into a hopper of a twin-screw kneading extruder (trade name: KZW-30MG, manufactured by Technobel Co., Ltd.) and pelletizing the strand obtained by melt-kneading at 270 ° C. A PET pellet kneaded with 0.003% by mass was obtained.
  • thermoplastic resin pellet to which inorganic fine particles were added A cycloolefin polymer (COP) pellet (manufactured by Nippon Zeon Co., Ltd., trade name: 1020R) was prepared as a thermoplastic resin. To this COP pellet, 0.15% by mass of ZrO 2 particles (manufactured by Kanto Denka Kogyo Co., Ltd., primary particle median diameter 10 nm) is added as inorganic fine particles to the COP pellet and mixed in a rotary mixer. As a result, a COP pellet having ZrO 2 particles uniformly adhered to the pellet surface was obtained.
  • COP cycloolefin polymer
  • ZrO 2 particles are obtained by putting the pellets into a hopper of a twin-screw kneading extruder (trade name: KZW-30MG, manufactured by Technobel Co., Ltd.) and pelletizing the strand obtained by melt-kneading at 260 ° C.
  • COP pellets containing 0.15% by mass were obtained.
  • the COP pellets with the ZrO 2 particles added of (1) above are put into a hopper of a twin screw kneading extruder (trade name: KZW-30MG), and a 500 ⁇ m thick light diffusion film is formed. did.
  • the screw diameter of the 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 twin-screw kneading extruder through an adapter.
  • the extrusion temperature was 260 ° 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.
  • Example 1 A reflective layer was formed by laminating titanium dioxide (TiO 2 ) to a thickness of 15 nm on one side of the light diffusion layer produced in Production Example 1 to obtain a laminate for a reflective screen.
  • the obtained reflective screen laminate had a very light brown luster, a haze value of 10.8%, and a total light transmittance of 82%, which was sufficiently transparent.
  • As a result of visual evaluation of color reproducibility it was possible to clearly see the video.
  • the reflected image seen from the rear had no change in color, and the brightness was improved as compared with the case where vapor deposition was not performed, and the image was clearer.
  • the reflected light intensity improvement magnification obtained by dividing the front reflection light intensity measured by placing the laminate on the stage so that light hits the undeposited surface with the variable angle photometer divided by the measured value with the film without the reflection layer is It was 4.1 times.
  • Example 2 A reflective screen laminate was prepared in the same manner as in Example 1 except that the thickness of TiO 2 was changed to 30 nm.
  • the obtained laminate had a light brown luster, a haze value of 11.3%, and a total light transmittance of 70%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 6.2 times. Further, the image clarity was 76%, and the image seen through the laminate was clear.
  • Example 3 A laminate was produced in the same manner as in Example 1 except that the thickness of TiO 2 was set to 150 nm.
  • the obtained laminate had a brown luster, a haze value of 11.0%, and a total light transmittance of 70%.
  • the color tone was slightly reddish compared to Examples 1 and 2, it was possible to visually recognize the image clearly.
  • the reflected light intensity improvement magnification obtained by dividing the front reflection light intensity measured by placing the laminate on the stage so that light hits the undeposited surface with the variable angle photometer divided by the measured value with the film without the reflection layer is It was 6.4 times. Further, the image clarity was 72%, and the image seen through the laminate was clear.
  • Example 4 On one side of the light diffusion layer produced in Production Example 1, zinc sulfide (ZnS) was laminated to a thickness of 10 nm by vapor deposition to form a reflective layer, thereby obtaining a laminate.
  • the obtained laminate was almost colorless, had a haze value of 9.5%, and a total light transmittance of 90%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 3.0 times.
  • the image clarity was 81%, and the image seen through the laminate was clear.
  • Example 5 A laminate was produced in the same manner as in Example 4 except that the film thickness of ZnS was changed to 60 nm.
  • the obtained laminate had a light blue gloss, had a haze value of 10.0%, and a total light transmittance of 70%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 11.0 times. Further, the image clarity was 77%, and the image seen through the laminate was clear.
  • Example 6 A laminate was produced in the same manner as in Example 4 except that the film thickness of ZnS was 80 nm.
  • the obtained laminate had a light blue gloss, a haze value of 9.8%, and a total light transmittance of 72%, which was sufficiently transparent.
  • a very weak bluish color change was observed depending on the image.
  • the reflected light intensity improvement magnification was 7.5 times. Further, the image clarity was 73%, and the image seen through the laminate was clear.
  • Example 7 A laminate was prepared in the same manner as in Example 4 except that the film thickness of ZnS was 140 nm.
  • the obtained laminate had a red to yellow gloss, a haze value of 9.2%, and a total light transmittance of 88%.
  • the reflected light intensity improvement magnification obtained by dividing the front reflection light intensity measured by placing the laminate on the stage so that light hits the undeposited surface with the variable angle photometer divided by the measured value with the film without the reflection layer is It was 6.9 times. Further, the image clarity was 71%, and the image seen through the laminate was clear.
  • Example 8 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 2 was used.
  • the obtained laminate had a light blue luster, had a haze value of 47.8%, and a total light transmittance of 72%, which was slightly cloudy, but had sufficient transparency.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 2.7 times. Further, the image clarity was 65%, and the image seen through the laminate was clear.
  • Example 9 A laminate (plate) was produced in the same manner as in Example 5 except that the light diffusion layer (plate) produced in Production Example 12 was used.
  • the obtained laminate (plate) had a light blue gloss, had a haze of 3.2%, and a total light transmittance of 71%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.8 times.
  • the image clarity was 83%, and the image seen through the laminate was clear.
  • Example 10 A screen laminate (plate) was produced in the same manner as in Example 5 except that the light diffusion layer (plate) produced in Production Example 13 was used.
  • the obtained laminate (plate) had a light blue gloss, had a haze of 3.2%, and a total light transmittance of 71%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.2 times. Further, the image clarity was 77%, and the image seen through the laminate was clear.
  • Example 11 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 3 was used.
  • the obtained laminate had a light blue gloss, had a haze value of 10.8%, and a total light transmittance of 70%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.2 times. Further, the image clarity was 77%, and the image seen through the laminate was clear.
  • Example 12 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 4 was used.
  • the obtained laminate had a light blue luster, a haze value of 9.9%, and a total light transmittance of 73%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 6.0 times. Further, the image clarity was 78%, and the image seen through the laminate was clear.
  • Example 13 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 5 was used.
  • the obtained laminate had a light blue luster, a haze value of 1.8%, and a total light transmittance of 71%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 3.0 times.
  • the image clarity was 79%, and the image seen through the laminate was clear.
  • Example 14 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 6 was used.
  • the obtained laminate had a light blue gloss, had a haze value of 5.2%, and a total light transmittance of 72%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.5 times.
  • the image clarity was 75%, and the image seen through the laminate was clear.
  • Example 15 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 7 was used.
  • the obtained laminate had a light blue gloss, had a haze value of 37.0%, and a total light transmittance of 72%, although it was slightly cloudy, but had sufficient transparency.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 3.1 times. Further, the image clarity was 62%, and the image seen through the laminate was clear.
  • Example 16 A reflective layer was formed by laminating indium tin oxide (ITO) to a thickness of 80 nm on one side of the light diffusion layer produced in Production Example 8 to obtain a laminate.
  • the obtained laminate had a very light gray luster, had a haze value of 10.5%, and a total light transmittance of 80%, which was sufficiently transparent.
  • ITO indium tin oxide
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 3.9 times. Further, the image clarity was 82%, and the image seen through the laminate was clear.
  • Example 17 A laminate was produced in the same manner as in Example 2 except that the light diffusion layer produced in Production Example 9 was used.
  • the obtained laminate had a light brown luster, a haze value of 9.2%, and a total light transmittance of 71%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 3.5 times.
  • the image clarity was 79%, and the image seen through the laminate was clear.
  • Example 18 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 9 was used.
  • the obtained laminate had a light brown luster, a haze value of 9.5%, and a total light transmittance of 70%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 8.5 times. Further, the image clarity was 78%, and the image seen through the laminate was clear.
  • Example 19 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 10 was used.
  • the obtained laminate had a light brown luster, a haze value of 7.8%, and a total light transmittance of 75%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light improvement factor was 4.6 times.
  • the image clarity was 83%, and the image seen through the laminate was clear.
  • Example 20 A laminate was produced in the same manner as in Example 5 except that the light diffusion layer produced in Production Example 11 was used.
  • the obtained laminate had a light brown luster, a haze value of 7.8%, and a total light transmittance of 71%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.8 times.
  • the image clarity was 85%, and the image seen through the laminate was clear.
  • Example 21 A laminate (plate) was produced in the same manner as in Example 5 except that the light diffusion layer (plate) produced in Production Example 14 was used.
  • the obtained laminate (plate) had a light brown luster, a haze of 23.1%, and a total light transmittance of 67%, although it was slightly cloudy and had sufficient transparency.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 6.2 times. Further, the image clarity was 73%, and the image seen through the laminate was clear.
  • Example 22 A laminate (plate) was produced in the same manner as in Example 5 except that the light diffusion layer (plate) produced in Production Example 15 was used.
  • the obtained laminate (plate) had a light brown luster, a haze of 10.1%, and a total light transmittance of 65%, which was sufficiently transparent.
  • a clear image with almost no color change was visually recognized.
  • the reflected light intensity improvement magnification was 4.8 times.
  • the image clarity was 83%, and the image seen through the laminate was clear.
  • Table 2 shows various physical properties and performance evaluation results of the laminates used in the examples and comparative examples.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

La présente invention a pour but de proposer un stratifié transparent dans lequel une lumière de projection émise à partir du côté observateur est diffusée et réfléchie de manière anisotrope, ce qui permet de garantir la visibilité de la lumière de projection ainsi que la visibilité de la lumière transmise. Le stratifié de la présente invention comporte une couche de diffusion de lumière contenant une résine ayant un indice de réfraction n1 et des microparticules ayant un indice de réfraction n2 différent de l'indice de réfraction n1, et une couche de réflexion transparente ayant un indice de réfraction n3 supérieur à l'indice de réfraction n1.
PCT/JP2015/083539 2014-12-02 2015-11-30 Stratifié transparent, écran réfléchissant le comprenant, et dispositif de projection d'image les comprenant WO2016088701A1 (fr)

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JP2017227901A (ja) * 2016-06-21 2017-12-28 日華化学株式会社 反射型スクリーン及び反射型スクリーン用シート、並びにそれらを用いた映像表示システム
JP2018045137A (ja) * 2016-09-15 2018-03-22 Ｊｘｔｇエネルギー株式会社 映像を投影可能な積層体、およびそれを備えた映像投影システム
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

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JP2013182141A (ja) * 2012-03-02 2013-09-12 Mitsubishi Paper Mills Ltd 透視可能な透過型スクリーン
WO2014009663A1 (fr) * 2012-07-13 2014-01-16 Saint-Gobain Glass France Élément transparent a réflexion diffuse comprenant une couche sol-gel

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JP2005156690A (ja) * 2003-11-21 2005-06-16 Dainippon Printing Co Ltd 投影スクリーン及びそれを備えた投影システム
WO2006016556A1 (fr) * 2004-08-10 2006-02-16 Kimoto Co., Ltd. Écran de transmission
JP2008112040A (ja) * 2006-10-31 2008-05-15 Teijin Dupont Films Japan Ltd 高透明反射型スクリーン用フィルム
JP2011164311A (ja) * 2010-02-08 2011-08-25 Sony Corp 光学体およびその製造方法、窓材、建具、ならびに日射遮蔽装置
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Publication number Priority date Publication date Assignee Title
JP2017227901A (ja) * 2016-06-21 2017-12-28 日華化学株式会社 反射型スクリーン及び反射型スクリーン用シート、並びにそれらを用いた映像表示システム
JP2018045137A (ja) * 2016-09-15 2018-03-22 Ｊｘｔｇエネルギー株式会社 映像を投影可能な積層体、およびそれを備えた映像投影システム
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

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