JP2016009149A - Translucent projection screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-shielding projection screen which is a translucent projection screen that is superior in terms of chromogenic clarity of translucent projection images under bright usage environments and a hotspot suppression effect, offers a heat-shielding property, and is suitable to be attached to a glass surface of a shop window.SOLUTION: A translucent projection screen is a light transmissive laminate having a translucent heat-ray reflective layer part comprising a thermoplastic resin film and a metal thin film layer formed thereon, and a light diffusion layer part laminated on top of the metal thin film layer, the light diffusion layer part containing a thermoplastic resin and light diffusion particles, where the light diffusive particle content is 10-60 mass%.

Description

  The present invention relates to a resin sheet for a transmissive projection screen, and in particular, the color clarity of a transmissive projection image in a bright environment in a digital display and digital signage that transmissively projects an image projected from the back of the screen to the back of the screen on the surface of the screen. The present invention relates to a projection screen / heat-shielding blind that is excellent in (high contrast effect) and hot-spot suppression effect and has a heat-shielding property, and is particularly used by being mounted on a glass surface of a show window.

  Digital signage (digital signage) that displays digital data as images and moving images via a computer has become widespread. Digital signage does not require realization such as posters and billboards, so it enables real-time and low-cost freedom of expression. One form of this is a method of projecting a projector from the back of the screen, which is particularly suitable for large visual media such as a show window. By using a transmissive screen having both appropriate translucency and light diffusibility for such a projection screen, it is possible to display a clear large screen image or moving image while hiding the projector light source.

  As a specific example of such a transmissive screen in which the light source position of the projector installed on the back side cannot be seen through and the image from the projector is clearly displayed, a plastic film is used as a support, and light diffusing particles are applied to this. A light transmission layer (Patent Document 1) having a haze of 80% or more, a total light transmittance of 60% or more, and a specular gloss of 10% or less provided with a light diffusion layer containing (inorganic pigment), and a light source through the light diffuser. As a screen that suppresses the color tone of the light source light from shifting and eliminates the appearance of the white light source appearing colored when it passes through the light diffuser, the transparent resin and the transparent resin have different refractive indexes. Prevents generation of transmission screens (Patent Document 2) and hot spots (projection light source reflection) formed from spherical fine particles that satisfy the conditions. As a screen capable of obtaining sufficient contrast and brightness, a black layer containing black beads having an average particle diameter of more than 6 μm to 12 μm and a binder resin is provided on a forward scattering film having a haze of 65% or more. A transmission type screen (Patent Document 3) is disclosed.

  Nowadays, in order to use large-scale visual media and get more eye-catching advertising effects and attracting customers, screens such as Patent Documents 1 to 3 are attached to the inside of the glass of the show window to show videos and others to passersby. Digital displays and digital signage that are projected by projectors are attracting attention. Large-scale show windows suitable for this method can be used indoors and outdoors, such as downtowns, underground malls, shopping malls, amusement facilities, event venues, station buildings, and airports. Also, the screens of Patent Documents 1 and 2 that are effective at night, such as causing the gradation of the projected image to be overexposed, lacked the vividness of the color vividness in the daytime environment. In addition, in large-scale show windows, there is a problem that strong sunlight in the summer increases the temperature in the store, but the screens of Patent Documents 1 to 3 do not have a heat shielding effect and do not have antistatic performance, etc. As a result, dust or dust adhering to the screen surface may cause fluttering diffused reflection noise, which may cause flickering in the projected image.

  Therefore, if there is a rear projection screen that has excellent color clarity and transparency in hot-projected images in a bright environment, a hot spot-inhibiting effect, and has heat shielding properties and anti-static properties as necessary, it is By using it for a show window, digital displays and digital signage that can stably transmit images and images to the passers-by through images projected by the projector regardless of day or night are possible, especially in the daytime in the summer, effectively reflecting the solar heat that shines on large show windows If possible, improvement of the efficiency of in-store cooling can be expected. According to such a digital display and digital signage, it is possible to produce a visual effect by projecting video and moving images on the ceiling surface and wall surface in addition to the show window. In addition, a part or all of the dome-shaped membrane structure is composed of a transmissive screen that includes a woven fabric as a base material, and images and videos can be displayed in all directions on the inner wall surface of the dome-shaped membrane structure by using multiple projectors. It enables digital display and digital signage to project and further display a transmission image and a moving image on the outer wall surface of the dome-shaped membrane structure.

JP 2005-024942 A JP 2007-249185 A JP 2010-250288 A

  The present invention is particularly suitable for digital display and digital signage that projects the image projected by the projector from the back of the screen to the back of the screen on the surface of the screen, and the color clarity (high contrast effect) and hot spot suppression of the transmitted image in a bright environment. The present invention provides a heat-shielding projection screen that is excellent in effect and has a heat-shielding property, is provided with antistatic properties as required, and is particularly suitable for mounting on a glass surface of a show window.

  As a result of various studies conducted by the present inventors in order to solve the above problems, a transparent heat ray reflective layer portion in which a metal thin film layer is provided on a thermoplastic resin film and a light diffusion layer laminated on the metal thin film layer In the light-transmitting laminate having a layer portion, the light diffusion layer portion contains a thermoplastic resin and light diffusing particles, and the content of the light diffusing particles is 10 to 60% by mass, thereby allowing near infrared rays. Highly clear color (high contrast effect) of transmitted images, especially in bright usage environments, with excellent reflectivity, and excellent hot spot suppression effects, providing a transmissive projection screen suitable for digital displays and digital signage. It has been found that a heat-shielding projection screen suitable for mounting on a glass surface of a show window can be obtained by exhibiting infrared reflectivity, and the present invention has been completed.

  That is, the transmissive projection screen of the present invention is a light transmissive laminate having a transparent heat ray reflective layer portion in which a metal thin film layer is provided on a thermoplastic resin film, and a light diffusion layer portion laminated on the metal thin film layer. And it is preferable that the said light-diffusion layer part contains a thermoplastic resin and light diffusable particle | grains, and the content rate of this light diffusable particle | grain shall be 10-60 mass%. This makes it possible to obtain a transparent projection screen that is excellent in color clarity and transparency of hot-projected images, especially in bright usage environments, and has a hot-spot suppression effect, and is suitable for mounting on the glass surface of a show window. A heat-shielding projection screen can be obtained.

  In the transmissive projection screen of the present invention, the transparent heat ray reflective layer portion has a curable transparent protective layer for the metal thin film layer, and the curing reaction of the curable transparent protective layer is performed after the light diffusion layer portion is laminated. It is preferable to intervene as an adhesive layer between the transparent heat ray reflective layer and the light diffusion layer. As a result, the adhesion between the transparent heat ray reflective layer part (that is, the metal thin film layer surface) and the light diffusion layer part is strengthened, the durability is increased, and at the same time, the wear deterioration and corrosion deterioration of the metal thin film layer are effectively suppressed. The heat shielding effect by reflection is stable for a long time.

  It is preferable that the transmissive projection screen of the present invention includes a dot pattern printing layer in either the transparent heat ray reflective layer portion or the light diffusion layer portion. The presence of this dot pattern promotes the visual effect of enhancing the contrast of the color image projected on the back in the brain, and is excellent in the clearness of the color of the transmitted projection image even in a bright usage environment, and also in the hot spot suppression effect. A heat-shielding transmission projection screen can be obtained.

In the transmissive projection screen of the present invention, the metal thin film layer is 1) a low refractive index layer having a refractive index of 1.5 or less, comprising at least one selected from Au, Ag, Cu, Al and SiO ₂ , and 2) WO ₃ , a multilayer structure composed of a high refractive index layer having a refractive index of 1.65 or more made of one or more selected from In ₂ O ₃ , ZrO ₂ , ZnO, SnO ₂ , and TiO _2. preferable. While maintaining transparency through light diffraction by a multilayer structure having a high refractive index layer and a low refractive index layer, a heat shielding effect by heat ray reflection is exhibited.

  In the transmission projection screen of the present invention, the light diffusing particles are preferably spherical solid particles and / or spherical hollow particles having an average particle diameter of 5 to 30 μm. As a result, a heat-shielding transmission projection screen having an excellent hot spot suppression effect can be obtained.

  In the transmissive projection screen of the present invention, it is preferable that the light transmissive laminate includes a light transmissive woven fabric as a core material. As a result, a part or all of the dome-shaped membrane structure is composed of a transmissive screen including a woven fabric as a base material, thereby satisfying the strength and durability of the building structure. This enables a digital display and digital signage to project images and moving images in 360 ° in all directions on the inner wall surface of the film-like film structure, and to simultaneously display the transmitted images and moving images on the outer wall surface of the dome-shaped film structure.

  In the transmissive projection screen of the present invention, it is preferable that the light-transmitting laminate has a surface resistance value (measurement method: JIS K6911, measurement condition: humidity 30% RH−temperature 23 ° C.) of less than 1.0E + 12Ω. As a result, anti-static properties are imparted to the transmission projection screen, and it is possible to always provide a projection image free from sparkling irregular reflection noise caused by dust or dust surface adhesion.

  According to the present invention, it is excellent in color sharpness (high contrast effect) and hot spot suppression effect of a transmitted image in a bright environment, has a heat shielding property, and is provided with an antistatic property as required, particularly in a show window. This makes it possible to obtain a heat-shielding projection screen suitable for mounting on a glass surface, so it is possible to easily express a digital display or digital signage by simply projecting from behind the projector, and in spite of the strong sunlight in summer. Since the rise in the store temperature is suppressed, the cooling efficiency is effectively improved. The heat-shielding transmissive projection screen according to the present invention is not only used for commercial purposes such as window displays and POP advertising billboards, but also has heat-shielding properties, so that it can be used for wall projection of movies and animations at amusement facilities, outdoor event venues, etc. It can also be used for wall projections such as promotional videos and live video. In addition, the use of digital signage in conjunction with Internet communication can be expected to provide news bulletins, traffic information, and real-time display of emergency evacuation guidance in the event of a disaster.

The figure which shows an example of the cross section of the transmission projection screen of this invention The figure which shows an example of the cross section of the transmission projection screen of this invention The figure which shows an example of the cross section of the transmission projection screen of this invention The figure which shows an example of the cross section of the transmission projection screen of this invention The figure which shows an example of the cross section of the transmission projection screen of this invention The figure which shows an example of the cross section of the transmission projection screen of this invention

  The transmissive projection screen of the present invention is a light transmissive laminate having a transparent heat ray reflective layer portion in which a metal thin film layer is provided on a thermoplastic resin film and a light diffusion layer portion laminated on the metal thin film layer. Other embodiments of the light transmissive laminate include 1) “transparent heat ray reflective layer / curable transparent protective layer / light diffusion layer” having a curable transparent protective layer for the metal thin film layer, and 2) a dot pattern printing layer. "Dot pattern printed layer / transparent heat ray reflective layer part / curable transparent protective layer / light diffusion layer part", "transparent heat ray reflective layer part / dot pattern printed layer / curable transparent protective layer / light diffusion layer part" ”,“ Transparent heat ray reflective layer / curable transparent protective layer / dot pattern printed layer / light diffusion layer ”,“ Transparent heat reflective layer / curable transparent protective layer / light diffused layer / dot pattern printed layer ” 3) “Translucent heat ray reflective layer part / light diffusing layer part / light transmissive woven cloth” including light transmissive woven cloth in the core material, “Transparent heat ray reflective layer part / curable transparent protective layer / light diffusion” Layer / light-transmitting woven fabric ”,“ dot pattern printed layer / transparent heat ray reflective layer / cured transparent Protective layer / light diffusion layer / light-transmitting woven fabric ”,“ translucent heat ray reflective layer / dot pattern printing layer / curable transparent protective layer / light diffusing layer / light-transmitting woven fabric ”,“ transparent heat ray ” Reflective layer part / curable transparent protective layer / dot pattern printing layer / light diffusion layer part / light-transmitting woven fabric ”, etc. In these embodiments, the exposed surface of the light-transmitting woven fabric is further made of a thermoplastic resin. A transparent layer or a light diffusion layer may be formed.

  As the thermoplastic resin film, a film produced within a thickness range of 0.1 mm to 1.0 mm by a known film / sheet manufacturing machine such as a calendar molding machine or a T-die extrusion molding machine can be used. As the thermoplastic resin, it is particularly preferable to use a cyclic olefin copolymer because it is excellent in optical transparency and is suitable for a vacuum deposition process, a sputtering process, and a plasma CVD process for providing a metal thin film layer. Such a cyclic olefin copolymer includes monomers of ethylene and / or an α-olefin compound having 3 to 20 carbon atoms (for example, propylene, 1-butene, 1-pentene, 1-hexene, etc.), norbornene, tetracyclododecene, and the like. It is a non-crystalline polymer (cycloolefin monomer content 60-85 mass%) by the copolymer with the cycloolefin monomer. In addition to the above monomers, a copolymer containing a third component monomer such as vinyl naphthalene, vinyl anthracene, vinyl phenanthrene, vinyl fluoranthene, or vinyl pyrene may be used. The thermoplastic resin film includes soft to semi-rigid vinyl chloride resin, vinyl chloride copolymer resin, olefin resin (PE, PP, etc.), olefin copolymer resin (EVA, EMMA, etc.), urethane resin, Urethane copolymer resin, acrylic resin, acrylic copolymer resin, vinyl acetate resin, vinyl acetate copolymer resin, styrene resin, styrene copolymer resin, polyester resin (PET, PEN, PBT, etc.), A film or sheet made of polyester-based copolymer resin, fluorine-containing copolymer resin, polycarbonate, polyamide, polyether, polyesteramide, polyetherester, or the like can be used. For the transmission screen of the present invention, polyester resin (PET, PEN, PBT) film can be used as a metal thin film layer Vacuum deposition processes for kicking sputtering process is suitable for the plasma CVD process.

The metal thin film layer is formed on only one surface or both surfaces of the thermoplastic resin film by a known vacuum deposition method, sputtering method, or plasma CVD method. The metal thin film layer is composed of 1) Au (gold), Ag (silver), Cu (copper), Al (aluminum), and SiO ₂ (silicon oxide). Low refractive index layer, 2) WO ₃ (tungsten oxide), In ₂ O ₃ (indium oxide), ZrO ₂ (zirconium oxide), ZnO (zinc oxide), SnO ₂ (tin oxide), and TiO ₂ (titanium oxide) A multi-layer structure composed of a high refractive index layer having a refractive index of 1.65 or more, including one or more selected from (for example, usage forms such as SnO ₂ doped with In ₂ O ₃ ). . While maintaining transparency by the action of light diffraction by the multilayer structure having such a high refractive index layer and a low refractive index layer, a heat shielding effect by heat ray reflection is exhibited. Examples of this multilayer structure include “metal layer / metal oxide layer / metal layer”, “metal oxide layer / metal layer / metal oxide layer”, “(metal layer / metal oxide layer) n”, “ (Metal oxide layer / metal layer) n ”,“ (metal layer / metal oxide layer) n / metal layer ”,“ (metal oxide layer / metal layer) n / metal oxide layer ”, etc. Exemplified, n represents the number of repeating structural units shown in parentheses, and n is an integer of 1 to 10, particularly preferably 1 to 3. The thickness of the metal thin film layer is not particularly limited as long as the average value of visible light transmittance at a wavelength of 400 nm to 750 nm satisfies 55% or more and the average value of infrared reflectance in a wavelength region of 5 μm to 30 μm satisfies 75% or more. Absent. Specifically, the thickness per layer of the metal thin film layer (multi-layer structure) is preferably about 5 nm to 100 nm, and if it is less than 5 nm, sufficient heat ray reflection effect is not exhibited, and the infrared transmittance increases, and when it exceeds 100 nm. When the total thickness of the multi-layer structure exceeds 1000 nm, coloring and half-mirroring increase, and the visible light transmittance may decrease, thereby deteriorating the appearance and transparency.

  In the transmissive projection screen of the present invention, the transparent heat ray reflective layer portion has a curable transparent protective layer for the metal thin film layer, and the curing reaction of the curable transparent protective layer is performed after the light diffusing layer portion is laminated. It is preferable to intervene as an adhesive layer between the heat ray reflective layer portion and the light diffusion layer portion. The curable transparent protective layer for the metal thin film layer is preferably provided in a range of 0.01 mm to 0.3 mm, and the curing reaction is performed after the lamination of the light diffusion layer portion, so that the transparent heat ray reflective layer portion (that is, Strengthens the adhesion between the metal thin film layer surface and the light diffusion layer, increases durability, and at the same time, effectively suppresses wear and corrosion degradation of the metal thin film layer and maintains the heat shielding effect by heat ray reflection for a long period of time. . In the present invention, the curable transparent protective layer can be used also as the light diffusing layer portion by containing 10-60 mass% of the light diffusing particles in the curable transparent protective layer. The curable transparent protective layer is selected from the thermoplastic resins described in paragraph [0019], preferably the same resin as the thermoplastic resin film used is selected, and the polyisocyanate compound, oxazoline compound, aziridine compound, acrylate as the curing component It is preferable to contain 1-20 mass% of reactive compounds, such as a compound, an epoxy compound, and a silane coupling agent, with respect to a thermoplastic resin. If it is necessary to further strengthen the adhesion between the transparent heat ray reflective layer portion (that is, the metal thin film layer surface) and the light diffusion layer portion and further protect from wear deterioration and corrosion deterioration, it is preferable to perform coating film crosslinking with an ultraviolet curable resin. Specifically, a liquid mixture of (photopolymerizable) acrylate monomer having 1 to 6 acryloyl groups at the end and (photopolymerizable) acrylate prepolymer is mechanically applied to the metal thin film layer. And complete the film curing by irradiating with UV light in the presence of a photopolymerization initiator such as benzophenone, or heat curing using a catalyst such as a vanadium catalyst, or heat curing using a peroxide such as benzoyl peroxide. Should be implemented. The acrylate monomer is an acrylate compound containing at least one structural component selected from an alkyl chain, a hydroxyalkyl chain, an alkylene oxide, an alkylene glycol, pentaerythritol, and a trimethylolalkane as part of the molecular structure, or It is a methacrylate compound. As the acrylate prepolymer, any of polyester, polyurethane, epoxy, polyether, alkyd, and the like can be used. Since the acrylate monomer has two or more acryloyl groups, the crosslinking density of the resulting coating film is increased and the hardness of the curable transparent protective layer is strengthened. The UV curing step is performed after the light diffusion layer portion is provided on the curable transparent protective layer (uncured), that is, “thermoplastic resin film / metal thin film layer / curable transparent protective layer (uncured) / light diffusion layer portion”. It is preferable to irradiate with ultraviolet rays in the form of “and make the ultraviolet curable resin function as an adhesive layer and perform ultraviolet curable adhesion between the transparent heat ray reflective layer portion and the light diffusion layer portion.

  It is preferable that a dot pattern printing layer is included in either the transparent heat ray reflective layer portion or the light diffusion layer portion. The dot pattern is 1) a sea-island relationship with black dots as islands, and a space other than these dots as colorless and transparent sea (light transmissive), or 2) colorless transparent dots (light transmissive) as islands, Any of the inverted dots in which the space other than the dots is a black sea may be used. The presence of such a dot pattern promotes the visual effect of enhancing the contrast of the color image projected on the back in the brain, and makes the color transparency of the transmitted projection image good even in a bright usage environment. Even if the dot pattern printing layer is formed on any of the surface, the inside, the bottom, and the surface or the back surface of the light diffusing layer portion of the transparent heat ray reflective layer portion, the effect is not inferior. The form formed on the surface is “dot pattern printed layer / transparent heat ray reflective layer part / curable transparent protective layer / light diffusion layer part”, and the form formed inside is “transparent heat ray reflective layer part / dot pattern print”. Layer / curing type transparent protective layer / light diffusion layer part ”, and the form formed on the bottom part is“ translucent heat ray reflection layer part / curing type transparent protective layer / dot pattern printing layer / light diffusion layer part ”,“ transparent heat ray ” Reflective layer part / curable transparent protective layer / light diffusion layer part / dot pattern printing layer ”. The dots are preferably circular to substantially circular. Although it may be a triangle or a quadrangle, it does not exhibit a particular advantage in the contrast effect obtained. Further, it is preferable that the dot pattern is regular, the distance between the dots positioned on the left and right is constant, and the distance between the dots positioned on the top and bottom is constant. The dot rows arranged vertically or horizontally may be either one in which the adjacent ones are arranged horizontally and vertically, or one in which the adjacent ones are arranged in a positional relationship shifted by half the distance between the dots. Although the dot diameter depends on the size of the screen, it is 0.05 mm to 1.0 mm, preferably 0.1 mm to 0.5 mm. As the black dots (or inverted dots), black pigments such as Pigment Black group 6, 7, 11, 26 of Color Index International (C.I.) can be used. Moreover, what provided the light transmittance of about 5-30% of visible light transmittance | permeability by diluting commercially available black ink with a medium, a solvent, etc. and using it at low concentration is preferable. The black ink is an ink containing any one or more of conductive carbon black, composite oxide black pigment, iron oxide black pigment, titanium oxide black pigment, azomethine azo black pigment, perylene black pigment, polyaniline, Conductive ink containing a conjugated polymer such as polythiophene or polypyrrole. The dot pattern printing layer can be formed by a known printing method such as gravure printing, screen (silk) printing, ink jet printing, or transfer printing.

The transmissive projection screen of the present invention has a transparent heat ray reflective layer portion and a light diffusion layer portion. The light diffusing layer portion contains a thermoplastic resin and light diffusing particles, and the content of the light diffusing particles is preferably 10 to 60% by mass with respect to the mass of the light diffusing layer portion. The presence of the light diffusing layer part imparts transmission projection properties to the screen, and at the same time allows the hot spot suppression effect to be exhibited. The thermoplastic resin constituting the light diffusion layer portion is selected from the thermoplastic resins described in paragraph [0019], and basically uses the same resin as the thermoplastic resin film used, and is a calendar molding machine or a T-die extrusion molding machine. What was manufactured in the range of thickness 0.1mm-1.0mm with well-known film-sheet manufacturing machines, such as these, can be used. The light diffusing particles include glass beads, glass powder, silica beads, silicone resin (or rubber) beads, acrylic resin beads, crosslinked acrylic resin beads, styrene resin beads, crosslinked styrene resin beads, melamine resin beads, and their surfaces. Spherical solid particles having an average particle diameter of 5 to 30 μm, particularly 5 to 20 μm are preferable, and at least one selected from treated beads is used. When heat shielding properties are particularly important, glass balloons, silica balloons, shirasu balloons, etc. It is preferable to use spherical hollow particles as a main component from the viewpoint of providing and forming a heat insulating layer. Here, the “average particle size of 5 to 30 μm” means an individual group of a particle group having an average particle size of 5 μm, a particle group having an average particle size of 6 μm, a particle group having an average particle size of 7 μm, and a particle group having an average particle size of 30 μm. means. The surface-treated beads are the ones coated with the reaction product of silane coupling agent or titanium coupling agent, hydrolyzate, coated with silica fine particles, or coated with a resin different from the bead constituent resin. Etc. Even if the average particle size of the light diffusing particles is about 50 μm, there is no particular adverse effect on the viewing image on a large screen. However, when the screen is bent, the light diffusing layer easily cracks, and Refraction causes a whitening phenomenon and may impair the sharpness of the projected image. On the other hand, if the average particle diameter is less than 5 μm, the light diffusion effect is insufficient and the hot spot suppression effect may be insufficient. When the content of the light diffusing particles is less than 10 parts by mass, the light diffusing effect is insufficient, and a problem that a projector light source (hot spot) is reflected in the projected image may occur. If the content of light diffusing particles exceeds 60 parts by mass, halation occurs in the projected image, or cracks occur in the light diffusing layer when the screen is bent, causing whitening due to light refraction at the cracks. , The sharpness of the projected image may be hindered. Further, it is possible to sufficiently ensure the light diffusing effect of the light diffusing particles under the condition that the refractive index difference between the thermoplastic resin and the light diffusing particles is 0.01 or more, particularly 0.05 or more. it can. If the difference in refractive index is 0.05 or more, either side of the refractive index of the thermoplastic resin and the light diffusing particles may be set to a high value. A value obtained by an Abbe refractometer using the D line as a light source is applied as the refractive index.

  The transmissive projection screen of the present invention may contain a light transmissive woven fabric in the core material. In these embodiments, “translucent heat ray reflective layer portion / light diffusion layer portion / light transmissive woven fabric”, “transparent heat ray reflective layer portion / curable transparent protective layer / light diffusing layer portion / light transmissive woven fabric”, "Dot pattern printed layer / transparent heat ray reflective layer / curable transparent protective layer / light diffusion layer / light transmissive woven fabric", "Transparent heat ray reflective layer / dot pattern printed layer / curable transparent protective layer / Light diffusion layer portion / light transmissive woven fabric ”,“ transparent heat ray reflective layer portion / curable transparent protective layer / dot pattern printing layer / light diffusion layer portion / light transmissive woven fabric ”, and the like. In the above, a transparent layer or a light diffusion layer made of a thermoplastic resin may be further formed on the exposed surface of the light-transmitting woven fabric. As the light-transmitting woven fabric, known woven fabrics such as plain weave, twill weave, satin weave, and patterned weave can be used. A light-transmitting woven fabric is a coarse woven fabric (porosity 10 to 50%) composed of warp yarns and weft yarns arranged evenly in parallel with the interval between yarns, and has light transmittance of the yarn itself. Furthermore, it has light transmittance due to a gap formed by a gap between yarns. Alternatively, it is a non-coarse woven fabric (porosity of less than 10%) and mainly depends on the light transmittance of the yarn itself. In the present invention, a high-density fabric having a porosity of 0 to 5% formed between the interlaces of the warp and weft yarns is particularly preferably used from the viewpoints of the reinforcing effect and the uniformity of the light diffusion effect. The light-transmitting woven fabric may be subjected to known flame retardant processing, water repellent treatment, adhesive treatment and the like.

  Semi-synthetic fibers such as polypropylene fiber, polyethylene fiber, polyester fiber, nylon fiber, vinylon fiber, acrylic fiber, etc., synthetic fiber long fiber yarn, diacetate fiber, triacetate fiber, etc. Long fiber, rayon fiber, recycled fiber yarn such as polynosic fiber, etc., long fiber yarn made of inorganic fiber such as glass fiber, silica fiber, alumina fiber, etc., these may be used alone or mixed and blended . For fiber mixing and spinning, known composite yarns such as twin yarns, triplet twisted yarns, core-sheath yarns, yarns in which short fibers are entangled with long fibers can be used. Polypropylene fiber, polyethylene fiber, polyester fiber, etc. may be in the form of monofilament yarn or stretched tape yarn. In the present invention, a multifilament yarn is preferable as the yarn constituting the light-transmitting woven fabric, and in particular, a multifilament yarn having 10 to 300 filaments and a fineness of 138 to 2223 dtex (decitex), particularly 277 to 1112 dtex is preferable.

  The transmissive projection screen of the present invention has an antifouling layer and an antistatic layer on one side or both sides of the light transmissive laminate for the purpose of preventing the surface from being scratched and improving the removal of attached dirt. It is preferable. The antifouling and antistatic layer includes an acrylic resin, a copolymer resin of a fluorine-containing monomer A and a fluorine-containing monomer B, an acrylic-silicon copolymer resin, an acrylic-fluorine copolymer resin, an acrylic-urethane copolymer resin, A blend of acrylic resin and fluorine copolymer resin, and a resin layer containing silica fine particles, colloidal silica, and organosilicate are used, and an antifouling and antistatic layer is formed by coating or film lamination. Form. The antifouling and antistatic layer can contain an antistatic agent, an ultraviolet absorber, an antibacterial agent, an antifungal agent and the like. In addition, an antifouling layer containing a photocatalytic inorganic material (for example, photocatalytic titanium oxide / photocatalytic tungsten oxide) may be provided on the surface of the light transmissive laminate, thereby improving the water washing removal performance of oily dirt. Can do.

  To impart antistatic properties to the antifouling and antistatic layer, a silica (silicon oxide) sol, an alumina (aluminum oxide) sol, a zirconia (zirconium oxide) sol, and a ceria (oxidized) having a primary particle diameter of 3 to 150 nm. Mass of antifouling and antistatic layer using inorganic colloids such as cerium) sol, tin oxide sol (phosphate doped) and composite oxide (zinc oxide-antimony pentoxide composite or tin oxide-antimony pentoxide composite) sol It is used at a content of 1 to 15% by mass with respect to. As a result, the surface resistance value of the antifouling and antistatic layer (measuring method: JIS K6911, measuring condition: humidity 30% RH-temperature 23 ° C.) is imparted with antistatic properties of less than 1.0E + 12Ω, and dust is applied to the screen surface. A beautiful projection screen is always maintained by preventing electrostatic adhesion of dust and dust, thereby making it difficult to cause irregular reflection of dust and dust. Further, the light transmissive laminate or the antifouling layer / antistatic layer may contain a surfactant, and the surface resistance value of the screen obtained thereby (measurement method: JIS K6911, measurement condition: humidity 30% RH- The temperature is 23 ° C), and antistatic property of less than 1.0E + 12Ω is added to prevent electrostatic adhesion of dust and dust to the screen surface, thereby always providing a beautiful projection screen free from dust and dust irregular reflection noise. Provided. Surfactant includes anionic surfactant (carboxylate, sulfate ester, sulfonate, phosphate ester salt), cationic surfactant (amine salt type, quaternary ammonium type), amphoteric surfactant (amino acid) Type, betaine type), nonionic surfactant (polyethylene glycol type, polyhydric alcohol type), etc., and 1-5% by mass with respect to the mass of the light-transmitting laminate or antifouling layer / antistatic layer Content. In addition to conjugated polymers such as polyaniline, polythiophene, polypyrrole, and the like as a polymer type antistatic agent, a copolymer containing a monomer A having at least one quaternary ammonium salt in the side chain as a copolymer component, for example, Quaternary ammonium salt type polymers such as polyvinyl benzyl type, poly (meth) acrylate type, styrene- (meth) acrylate copolymer type, styrene-maleimide copolymer type, methacrylate-methacrylimide copolymer type can be used. These polymer type antistatic agents are more preferably used in combination with the above-described inorganic colloid substances and in a mass ratio of 3: 1 to 1: 3.

  The transmission projection screen of the present invention can be used in various forms such as an example of using it on the inside of the glass surface of a show window, an example of using it on the outside of the glass surface, an example of installing a screen in the space inside the show window, Even if the glass surface is arcuate, the transmission projection screen of the present invention has flexibility to follow the curved surface. Since the transmission projection screen of the present invention has a smooth surface and high adhesion to the glass surface, and maintains a state of less air accumulation, it can be installed on the glass surface only by fixing the four corners. By attaching the adhesiveness to the screen surface with the agent spray, the stability of sticking to the glass surface can be further increased. In the installation of the transmissive projection screen of the present invention, it is effective for the expression of heat shielding that the transparent heat ray reflective layer part is directed outward of the show window and the light diffusion layer part is opposed to the video projection device. As the video projection device, a video projection device such as a slide projector, a film projector, a planetarium projector, a laser projector, an overhead projector, and a video projector can be used, and a video projector is particularly preferable. The video projector is linked with a computer and projects POP advertisements and moving images stored in the computer (hard disk) or information, images, and moving images obtained through a wireless or Internet line via the computer. These video projectors are arranged in the center of the rear surface of the transmissive projection screen. However, in a space where the depth is narrow, an oblique projection using a reflection mirror may be used. In addition, it is effective for visual presentation of a show window to attach a sound device such as a speaker, a flat speaker, and an electronic audio device to the transmissive projection screen of the present invention.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these.
The following evaluation was performed on the transmission projection screens created in the examples and comparative examples. The size of the transmissive projection screen was 1.5 m × 2.0 m, and a liquid crystal video projector (EH-TW500S manufactured by Seiko Epson Corporation) was used as a video projection device on the back.
<Visibility of projector light source: presence of hot spot>
A video projector was placed at a distance of 2 m on the back side of a 1.5 m long by 2.0 m wide projection screen. The projected video was observed from directly in front of the seat and evaluated according to the following criteria.
1: No hot spot: The projector light source position cannot be recognized. 2: A slight hot spot is recognized: The projector light source position can be recognized roughly. 3: The hot spot is present: The projector light source position can be clearly recognized. Contrast)>
1: Brightness is high and clear 2: Brightness is high and blurry 3: Low brightness and blurry <Visible light transmittance>
The visible light transmittance of the transmission projection screen was measured according to JIS Z8722 using a spectroscopic color meter CM-3600d (manufactured by Konica Minolta).
<Heat ray reflection effect>
A temperature rise curve by irradiation with a 250 W infrared lamp by the ASTM D4803-97 method was measured for 30 minutes indoors, and the temperature after 30 minutes was determined.
<Heat shielding effect>
A cube frame having a width of 100 cm, a height of 100 cm, and a depth of 100 cm was assembled with an aluminum L-shaped angle (width: 35 mm), and a transmission projection screen was pasted and fixed on the entire surface except the bottom surface of the cube frame to prepare a test box. A temperature sensor (temperature sensor in the center of the test box inside the test box) in the environment where sunlight from noon to 13:00 is directly shining through this test box (Soka City, Saitama, June: fine weather: temperature 28 ° C) Was suspended in a space of 50 cm above the floor).

[Example 1]
1-1) Cyclic olefin copolymer of a copolymer of ethylene and norbornene (norbornene content 78% by mass): Trademark “TOPAS”: Product No. 6015: Polyplastics Co., Ltd .: Refractive index 1.53 (ISO 489): Light transmission A rate (2 mmt) 91 (ISO13468-2) was calendered under a hot roll condition of 175 ° C. to obtain a transparent film having a width of 100 cm and a thickness of 0.2 mm.
1-2) The back surface of the film obtained in 1-1) above is subjected to indium oxide sputtering under a vacuum of 5 × 10 ⁻⁵ torr to form an indium oxide layer (refractive index 2.06) having a thickness of 10 nm. Then, a silver thin film layer (refractive index of 0.17) having a thickness of 12 nm is formed on the same under the same vacuum condition to form a silver thin film layer (refractive index of 0.17). A 20 nm indium oxide layer (refractive index of 2.06) was formed, and a transparent heat ray reflective layer portion provided with a metal thin film layer having a multilayer structure of “In ₂ O ₃ / Ag / In ₂ O ₃ ” was obtained. . Further, an ultraviolet curable acrylic resin composition (1) was applied on the metal thin film layer of the transparent heat ray reflective layer portion to form a 25 μm thick curable transparent protective layer (uncured).
<Ultraviolet curable acrylic resin composition (1)>
Ethylene oxide-modified trimethylolpropane triacrylate acryloyl groups having three acrylate compounds: _{[CH 2 = CHCO- (OC 2 H} 4) -OCH 2 ] ₃ -CCH ₂ CH _3] 100 parts by weight polyester acrylate prepolymer A liquid composition containing 0.8% by mass of benzophenone as a photopolymerization initiator (sensitizer) was used at 100 parts by mass.
1-3) Cyclic olefin copolymer used for the thermoplastic resin film of the transparent heat ray reflective layer portion of 1-1) above: Trademark “TOPAS”: Part No. 6015: Polyplastics Co., Ltd .: Refractive index 1.53 (ISO 489) For 100 parts by mass, cross-linked polymethyl methacrylate substantially spherical particles (average particle diameter 12 μm) as light diffusing particles: Trademark “Techpolymer”: Part No. MBX-12: Sekisui Plastics Co., Ltd .: Refractive index 1.49 The composition containing 20 parts by mass was calendered under a hot roll condition of 175 ° C. to obtain a light transmission diffusive film (light diffusion layer part) having a width of 100 cm and a thickness of 0.2 mm.
1-4) The light transmissive diffusive film (light diffusing layer part) obtained in 1-3) above was provided on the transparent heat ray reflective layer part obtained in 1-2) and the transparent heat ray reflective layer part. It is laminated on the curable transparent protective layer (uncured) surface, and the curable transparent protective layer is sandwiched between the transparent heat ray reflective layer part and the light diffusing layer part, and then irradiated with ultraviolet rays, thereby curable transparent protection. At the same time as the curing reaction of the layer was completed, the transparent heat ray reflective layer portion and the light diffusion layer portion were adhered to obtain a light transmissive laminate having a thickness of 0.42 mm.

[Example 2]
2-1) The film by the cyclic olefin copolymer used for the transparent heat ray reflective layer part of Example 1 was changed, and a polyethylene terephthalate (PET) film having a width of 100 cm and a thickness of 188 μm was used. It was obtained through property heat ray reflective layer portion having a metal thin film layer made of multi-layer structure of _{"In 2 O 3 / Ag / In} 2 O 3 " backside in Example 1 the same and the film.
2-2) The ultraviolet curable acrylic resin composition (2) was applied on the metal thin film layer of the transparent heat ray reflective layer to form a 50 μm thick curable transparent protective layer (uncured).
<Ultraviolet curable acrylic resin composition (2)>
Ethylene oxide-modified trimethylolpropane triacrylate acryloyl groups having three acrylate compounds: _{[CH 2 = CHCO- (OC 2 H} 4) -OCH 2 ] ₃ -CCH ₂ CH _3] 100 parts by weight polyester acrylate prepolymer In 100 parts by mass, cross-linked polymethyl methacrylate substantially spherical particles (average particle diameter 12 μm) as light diffusing particles: Trademark “Techpolymer”: Product No. MBX-12: Sekisui Plastics Co., Ltd .: Refractive index 1.49 is 40 A liquid composition containing 0.8 parts by mass of benzophenone was used as a photopolymerization initiator (sensitizer).
2-3) A transparent heat ray reflective layer part obtained in 2-2) with a 100 cm wide × 188 μm thick polyethylene terephthalate (PET) film, and a curable transparent protective layer (not yet provided) on the transparent heat ray reflective layer part At the same time that the curable transparent protective layer is laminated, the ultraviolet ray is irradiated while the curable transparent protective layer is sandwiched between the transparent heat ray reflective layer and the PET film to complete the curing reaction of the curable transparent protective layer. The transparent heat ray reflective layer and the PET film were adhered to obtain a light transmissive laminate having a thickness of 0.4 mm. In Example 2, the curable transparent protective layer (cured) is substantially a light diffusing layer portion, and the light diffusing layer portion and the curable transparent protective layer are combined.

[Example 3]
3-1) Using a transparent film having a width of 100 cm and a thickness of 0.2 mm using the cyclic olefin copolymer (trademark “TOPAS”: product number 6015: manufactured by Polyplastics Co., Ltd.) used in Example 1, 5 × 10 ⁻ Titanium oxide was sputtered under a vacuum of ⁵ torr to form a 12 nm thick titanium oxide layer (refractive index of 2.5), and then this was sputtered with silver under the same vacuum conditions to a thickness of 15 nm. A silver thin film layer (refractive index 0.17) is formed, and further, a titanium oxide sputtering process (refractive index 2.5) is formed thereon by sputtering titanium oxide under vacuum conditions, and “TiO ₂ / A transparent heat ray reflective layer portion provided with a metal thin film layer having a multilayer structure of “Ag / TiO ₂ ” was obtained. Further, the same ultraviolet curable acrylic resin composition (1) as in Example 1 was applied on the metal thin film layer of the transparent heat ray reflective layer portion to form a 25 μm thick curable transparent protective layer (uncured).
3-2) A light transmissive diffusing film (containing light diffusing particles) having the same specifications as used in 1-3) of Example 1 is used for the light diffusing layer portion, and a black dot pattern having the following specifications is used on the surface of the film The printing layer was formed by gravure printing.
<Black dot pattern printing layer>
3-2-1) Black ink (CI) Pigment Black 7 was blended with the ultraviolet curable acrylic resin composition (1) used in 2) of Example 1, and light was applied when the dot printing part had a film thickness of 5 μm. The density was adjusted to a transmittance of 12 to 15%.
3-2-2) Black dots are circular with a diameter of 0.08 mm, and as a pattern, the dot rows arranged vertically or horizontally are arranged at positions where the adjacent dots are displaced by a half distance between the dots (0.12 mm). A gravure roll imprinted with a regular mesh of 150 mesh was used.
3-2-3) After printing, the black dot printing portion was cured by ultraviolet irradiation to form a black dot pattern printing layer.
3-4) Curing type transparent protection of the transparent heat ray reflective layer part obtained in 3-1) with the light transmissive diffusive film (light diffusion layer part) having the black dot pattern printing layer obtained in 3-2) above The layer (uncured) surface and the black dot pattern printed layer surface are laminated so that the curable transparent protective layer is sandwiched between the transparent heat ray reflective layer part and the light diffusion layer part, and then UV irradiation is performed. Then, the curing reaction of the curable transparent protective layer was completed, and at the same time, the transparent heat ray reflective layer part and the light diffusion layer part were adhered to obtain a light transmissive laminate having a thickness of 0.42 mm.

[Example 4]
4-1) The film made of the cyclic olefin copolymer used in the transparent heat ray reflective layer part of Example 3 was changed, and a polyethylene terephthalate (PET) film having a width of 100 cm and a thickness of 188 μm was used. It was obtained through property heat ray reflective layer portion having a metal thin film layer made of multi-layer structure of "TiO ₂ / _Ag / TiO 2" backside in Example 3 same as in the film. Further, the same ultraviolet curable acrylic resin composition (2) as in Example 2 was applied on the metal thin film layer of the transparent heat ray reflective layer portion to form a 50 μm thick curable transparent protective layer (uncured). .
4-2) The same black dot pattern printing layer as in 3-2) of Example 3 was formed on the surface of the PET film having the same specifications as used in 2-3) of Example 2 by gravure printing. 3-3) A light-transmitting laminate having a thickness of 0.4 mm was obtained by the same lamination and ultraviolet curing procedure. In Example 4, the curable transparent protective layer (cured) is substantially a light diffusing layer part, and serves both as the light diffusing layer part and the curable transparent protective layer.

[Example 5]
5-1) The film by the cyclic olefin copolymer used for the transparent heat ray reflective layer part of Example 1 was changed, and a polyethylene terephthalate (PET) film having a width of 100 cm and a thickness of 188 μm was used. It was obtained through property heat ray reflective layer portion having a metal thin film layer made of multi-layer structure of _{"In 2 O 3 / Ag / In} 2 O 3 " backside in Example 1 the same and the film.
5-2) The ultraviolet curable acrylic resin composition (1) used in Example 1 was applied on the metal thin film layer of the transparent heat ray reflective layer, and a 25 μm thick curable transparent protective layer (uncured) Formed.
5-3) Transparent heat ray reflection obtained in 5-2) using a PET film having a 100 cm width × 188 μm thickness containing 15% by mass of spherical glass beads having an average particle diameter of 10 μm (surface treatment with aminosilane) as a light diffusion layer part. The layer portion and the curable transparent protective layer (uncured) surface provided on the transparent heat ray reflective layer portion were laminated, and the curable transparent protective layer was sandwiched between the transparent heat ray reflective layer portion and the PET film. In this state, ultraviolet irradiation was performed to complete the curing reaction of the curable transparent protective layer, and at the same time, the transparent heat ray reflective layer part and the PET film were adhered to obtain a light transmissive laminate having a thickness of 0.4 mm. .

[Example 6]
6-1) The film made of the cyclic olefin copolymer used in the transparent heat ray reflective layer part of Example 3 was changed, and a polyethylene terephthalate (PET) film having a width of 100 cm and a thickness of 188 μm was used. It was obtained through property heat ray reflective layer portion having a metal thin film layer made of multi-layer structure of "TiO ₂ / _Ag / TiO 2" backside in Example 3 same as in the film.
6-2) On the metal thin film layer of the transparent heat ray reflective layer portion, the same ultraviolet curable acrylic resin composition (1) as in Example 1 was applied, and a 25 μm thick curable transparent protective layer (uncured) Formed.
6-3) A PET film 100 cm wide × 188 μm thick containing 15% by mass of spherical glass beads (surface treatment with aminosilane) having an average particle diameter of 10 μm was used as a light diffusion layer portion, and 3-2 of Example 3) on this surface) The same black dot pattern print layer formed by gravure printing is used as the light diffusion layer part, and the transparent heat ray reflective layer part obtained in 6-2), and the curable transparent provided on the transparent heat ray reflective layer part Laminate on the protective layer (uncured) surface, and with the curable transparent protective layer sandwiched between the transparent heat ray reflective layer part and the PET film, UV irradiation is performed to cure the curable transparent protective layer. At the same time of completion, the transparent heat ray reflective layer and the PET film were adhered to obtain a light transmissive laminate having a thickness of 0.4 mm.

[Examples 7 to 12]
A coating liquid composition according to the following formulation 1 was applied to both surfaces of the light transmissive laminates (screens) of Examples 1 to 6 with a 100 mesh gravure roll, dried and cured for several days to complete sol-gel curing and antifouling. A layer-cum-antistatic layer was formed to obtain various screens (Example 1 base is Example 7, Example 2 base is Example 8, and so on).
<Formulation 1> Antifouling layer and antistatic layer Zinc oxide-antimony pentoxide double oxide sol (manufactured by Nissan Chemical Industries, Ltd .: trade name "CELNAX")
Product number: CX-Z603M-F2: particle size 15 nm: solid content 60% by mass) 100 parts by mass vinyltriethoxysilane (silane coupling agent) 50 parts by mass benzotriazole compound (ultraviolet absorber) 1 part by mass Polyethylene glycol type non-ion Activator (antistatic agent) 1 part by weight Diluent (water) 100 parts by weight

[Examples 13 to 24]
The screens of Examples 1 to 12 and the following glass woven fabric were laminated with an adhesive (two-component curable polyurethane: a mixture of polyurethane prepolymer and polyisocyanate), and the glass woven fabric was a core material on one side of the light transmissive laminate. (The base of Example 1 is Example 13, the base of Example 2 is Example 14, and so on).
<Glass woven fabric>
375 dtex E glass (refractive index: 1.558) Untwisted flat multifilament yarns with warp and weft as a warp density of 32 yarns / inch, weft density of 32 yarns / inch and a porosity of 1. Glass woven fabric of less than 0% and mass of 100 g / m ² (silane coupling treatment)

  All of the transmissive projection screens of Examples 1 to 24 were excellent in the color clarity and the hot spot suppression effect of the transmissive projection image in a bright environment, and had sufficient heat ray reflection effect and heat shielding property. In particular, the anti-fouling and antistatic layers of Examples 7 to 12 (Examples 19 to 24 are substantially the same in terms of individual correspondence with Examples 7 to 12) are provided, and transmission projection with an antistatic effect is provided. The screen can be easily removed by wiping with a paper towel or wiping cloth, etc., even if dirt is attached to the screen, has an antistatic effect of 1.0E + 9Ω to 10Ω, and adheres to dust or dust caused by static electricity. Since the projector image is extremely small, it is difficult for the projector projection image to cause irregular reflection due to the presence of dust or dust.

[Comparative Example 1]
In Example 1, a sheet having a thickness of 0.42 mm was obtained in the same manner as in Example 1 except that the blending of the light diffusing particles was omitted from the light diffusion layer part. The obtained sheet lacks the light diffusion effect, the projected image is unclear, the projector's light source (hot spot) is exposed, and the projector has a projection screen function that causes the light source to be reflected in the projected image. It was not.

[Comparative Example 2]
In Example 1, a sheet having a thickness of 0.42 mm was obtained in the same manner as in Example 1 except that the content ratio of the light diffusing particles in the light diffusing layer portion was 5% by mass. The obtained sheet has insufficient light diffusion effect, the projected image is unclear, the projector's light source (hot spot) is exposed, and the projection screen functions sufficiently, such as causing the light source to be reflected in the projected image It was not expressed.

[Comparative Example 3]
In Example 1, a sheet having a thickness of 0.42 mm was obtained in the same manner as in Example 1 except that the content of the light diffusing particles in the light diffusing layer was 80% by mass. The obtained sheet has a sufficient light diffusion effect, conceals the light source (hot spot) of the projector, and the projected image is also clear, but the light diffuses when the image is halated or the sheet is bent Cracks were likely to occur in the layer part, and whitening occurred due to the refraction of light in the crack part, thereby impairing the sharpness of the projected image.

[Comparative Example 4]
In Example 1, a sheet having a thickness of 0.42 mm was obtained in the same manner as in Example 1 except that the formation of the metal thin film layer was omitted from the transparent heat ray reflective layer part. The obtained sheet had a sufficient light diffusion effect, concealed the light source (hot spot) of the projector, and the projected image was clear, but did not have a heat ray reflection effect or a heat shielding effect.

  The transmission projection screen of the present invention is excellent in color clarity (high contrast effect) and hot spot suppression effect of a transmission image in a bright environment, has a heat shielding effect, and is provided with antistatic properties as necessary. In particular, it is possible to obtain a heat-shielding projection screen suitable for mounting on the glass surface of a show window, so it is possible to easily express a digital display, digital signage, etc. by simply projecting from the back, and also in the strong sunlight in summer Regardless, since the rise in the store temperature is suppressed, the cooling efficiency is effectively improved. The heat-shielding transmissive projection screen according to the present invention is not only used for commercial purposes such as window displays and POP advertising billboards, but also has heat-shielding properties, so that it can be used for wall projection of movies and animations at amusement facilities, outdoor event venues, etc. It can also be used for wall projections such as promotional videos and live video. In addition, the use of digital signage in conjunction with Internet communication can be expected to provide news bulletins, traffic information, and real-time display of emergency evacuation guidance in the event of a disaster.

1: Transmission projection screen (light-transmitting laminate)
2: Transparent heat ray reflective layer part 2-1: Thermoplastic resin film 2-2: Metal thin film layer 3: Light diffusion layer part 3-1: Light diffusing particle 4: Curing type transparent protective layer 5: Black dot pattern printing Layer 6: Light-transmitting woven fabric

Claims (7)

  A light transmissive laminate having a transparent heat ray reflective layer portion in which a metal thin film layer is provided on a thermoplastic resin film, and a light diffusion layer portion laminated on the metal thin film layer, wherein the light diffusion layer portion is A transmissive projection screen comprising a thermoplastic resin and light diffusing particles, wherein the content of the light diffusing particles is 10 to 60% by mass.   The transparent heat ray reflective layer portion has a curable transparent protective layer for the metal thin film layer, and the curing reaction of the curable transparent protective layer is performed after the light diffusion layer portion is laminated, and the transparent heat ray reflective layer The transmissive projection screen according to claim 1, wherein the transmissive projection screen is interposed as an adhesive layer between the portion and the light diffusion layer portion.   The transmissive projection screen according to claim 1, wherein a dot pattern printing layer is included in any one of the transparent heat ray reflective layer portion and the light diffusion layer portion. The metal thin film layer is 1) a low refractive index layer having a refractive index of 1.5 or less, consisting of one or more selected from Au, Ag, Cu, Al and SiO ₂ , 2) WO ₃ , In ₂ O ₃ , ZrO _2. A multilayer structure comprising a high refractive index layer having a refractive index of 1.65 or more, which is composed of one or more selected from Zn, ZnO, SnO ₂ , and TiO _2. The transmission projection screen described in 1.   The transmission projection screen according to claim 1, wherein the light diffusing particles are spherical solid particles and / or spherical hollow particles having an average particle diameter of 5 to 30 μm.   The transmissive projection screen according to claim 1, wherein the light transmissive laminate includes a light transmissive woven fabric in a core material.   The surface resistance value (measurement method: JIS K6911, measurement condition: humidity 30% RH-temperature 23 ° C) of the light-transmitting laminate is less than 1.0E + 12Ω. Transparent projection screen.