WO2020042561A1 - 反射固化胶、透明固化胶、投影屏幕及其制备方法 - Google Patents

反射固化胶、透明固化胶、投影屏幕及其制备方法 Download PDF

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Publication number
WO2020042561A1
WO2020042561A1 PCT/CN2019/076615 CN2019076615W WO2020042561A1 WO 2020042561 A1 WO2020042561 A1 WO 2020042561A1 CN 2019076615 W CN2019076615 W CN 2019076615W WO 2020042561 A1 WO2020042561 A1 WO 2020042561A1
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Prior art keywords
layer
curing
weight
parts
reflection
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PCT/CN2019/076615
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English (en)
French (fr)
Inventor
王杰
王霖
崔可建
张红秀
李屹
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深圳光峰科技股份有限公司
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Publication of WO2020042561A1 publication Critical patent/WO2020042561A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0806—Silver
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0812—Aluminium

Definitions

  • the invention relates to a reflection curing glue, a transparent curing glue, a projection screen and a preparation method thereof, and belongs to the technical field of display screen manufacturing.
  • the traditional white screen is susceptible to interference from ambient light.
  • the contrast of the picture is not high under bright living room lighting conditions, and it cannot display colors well.
  • To increase the contrast of the picture it is necessary to reduce the reflectance of the ambient light, while maintaining the gain of the screen as much as possible.
  • Existing Fresnel light curtains usually consist of a diffusion layer, an upper base layer, a glue layer, a lower base layer and a reflective layer.
  • the thickness of the diffusion layer is generally 5 ⁇ m to 10 ⁇ m.
  • the thickness of the upper base layer is 50 ⁇ m-250 ⁇ m
  • the thickness of the bonding glue layer is 5 ⁇ m-10 ⁇ m
  • the lower base layer is 50 ⁇ m-250 ⁇ m
  • the thickness of the reflective layer is 110 ⁇ m-250 ⁇ m
  • the above structure makes the overall thickness of the light-resistant curtain as high as 220 ⁇ m-770 ⁇ m.
  • some light-resistant curtains also include a bulk diffusion layer and a gray absorbing layer. At this time, the overall thickness of the light-resistant curtain can even reach 2 mm.
  • the existing formation process of the reflective layer is mainly various coating methods such as spray coating or screen printing.
  • This process will necessarily use a large proportion of organic solvent mixtures, such as anhydrous acetone, anhydrous xylene, and anhydrous cyclohexanone , Anhydrous methyl ethyl ketone, ethyl acetate and anhydrous ethyl acetate.
  • organic solvent mixtures such as anhydrous acetone, anhydrous xylene, and anhydrous cyclohexanone , Anhydrous methyl ethyl ketone, ethyl acetate and anhydrous ethyl acetate.
  • Such solvents can cause volatile organic compound (VOC) emissions during the production process and subsequent drying, posing a threat to the environment and human health.
  • VOC volatile organic compound
  • the technical problem to be solved by the present invention is to provide a reflection curing adhesive, a transparent curing adhesive, a projection screen, and a preparation method thereof in response to the shortcomings of the prior art.
  • the secondary curing method is used to make the substrate, the microstructure reflective layer and the diffuser layer that make up the projection screen tightly combined, which greatly reduces the thickness of the product, realizes the production of ultra-thin projection light curtain, and reduces the production cost.
  • a large amount of organic solvent mixture is not required in the production process of the projection screen, which will not cause VOC emissions, and is more environmentally friendly and safe compared with the existing process.
  • the invention provides a reflective curing adhesive, which is used to form a reflective structure layer on a substrate of a projection screen.
  • the reflective curing adhesive comprises the following components in parts by weight:
  • the reflection curing adhesive auxiliary agent includes a dispersant, a leveling agent, an antifoaming agent, and a polymerization inhibitor.
  • the UV absorption peak of the 184 photoinitiator is 240nm-250nm or 320nm-335nm; the UV absorption peak of the 819 photoinitiator is 365nm-400nm.
  • the reflection curing glue body includes the following components in parts by weight:
  • the reflection curable glue main body comprises the following components in parts by weight:
  • the doped particles include the following components in parts by weight:
  • Scattering particles 0.5-5 parts by weight.
  • the reflection curing adhesive assistant comprises the following components in parts by weight:
  • the invention also provides a transparent curing glue for forming a glue filling layer on the reflective structure layer as described above, and forming a reflecting layer on the glue filling layer.
  • the transparent curing glue contains Components:
  • the transparent curing adhesive auxiliary agent includes a defoaming agent, a leveling agent, and a polymerization inhibitor.
  • the UV absorption peak of the 184 photoinitiator is 240nm-250nm or 320nm-335nm; the UV absorption peak of the 819 photoinitiator is 365nm-400nm.
  • the transparent curing gum body includes the following components in parts by weight:
  • the transparent curing gum body comprises the following components in parts by weight:
  • the invention also provides a projection screen.
  • the projection screen includes a substrate, a microstructure reflective layer, and a diffusion layer that are sequentially stacked.
  • the microstructure reflective layer includes a reflective structure layer and a glue filling layer.
  • the material of the reflective structure layer is The reflection curing glue as described above; the material of the glue filling layer and the diffusion layer is the transparent curing glue as described above.
  • the thickness of the substrate is 50 ⁇ m to 250 ⁇ m
  • the thickness of the microstructured reflective layer is 100 ⁇ m
  • the thickness of the diffusion layer is 5 ⁇ m to 10 ⁇ m.
  • the reflectivity of the reflective structure layer is 10% -35%; preferably 20% -25%.
  • the present invention also provides a method for preparing a projection screen.
  • the projection screen is the projection screen as described above, and the preparation method includes:
  • the second UV curing device is used to cure the diffusion layer to form a projection screen.
  • the present invention adds two photoinitiators to the reflective curing adhesive and the transparent curing adhesive, and adopts a secondary curing method to make the substrate, the microstructure reflective layer, and the diffusion layer constituting the projection screen tight.
  • the combination greatly reduces the thickness of the product, realizes the production of ultra-thin projection light curtain, and reduces the production cost.
  • the production process of the projection screen does not require a large amount of organic solvent mixture, which does not cause VOC emissions, which is in line with existing processes. More environmentally friendly and safe.
  • FIG. 1 is a structural sectional view of a projection screen of the present invention
  • FIG. 2 is a schematic diagram of the principle of collimating the light of the projector by the projection screen of the present invention
  • FIG. 3 is a schematic diagram showing a relationship between a radius of a reflective structure layer, a first incident surface, and a second incident surface of the present invention
  • FIG. 4 is a schematic diagram of a production process of a reflective structure layer according to the present invention.
  • FIG. 5 is a schematic diagram of a production process of a glue filling layer according to the present invention.
  • FIG. 6 is a schematic diagram of a production process of a diffusion layer according to the present invention.
  • FIG. 1 is a structural cross-sectional view of a projection screen of the present invention
  • FIG. 2 is a schematic diagram of the principle of collimating light from a projector screen of the present invention
  • FIG. 3 is a radius of a reflective structure layer of the present invention Relationship diagram.
  • the present invention provides a projection screen.
  • the projection screen includes a substrate 4, a microstructure reflective layer, and a diffusion layer 1 stacked in this order.
  • the microstructure reflective layer includes a reflective structure layer 3 and glue.
  • the filling layer 2 wherein the thickness of the substrate 4 is 50 ⁇ m-250 ⁇ m, the thickness of the microstructure reflection layer is 100 ⁇ m, and the thickness of the diffusion layer 1 is 5 ⁇ m-10 ⁇ m; that is, the thickness of the projection screen in the present invention is 155 ⁇ m-360 ⁇ m.
  • the substrate 4 may be made of organic materials such as polyethylene terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), and polymethyl methacrylate (PMMA), and is extruded. Way made.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PVC polyvinyl chloride
  • PMMA polymethyl methacrylate
  • the substrate 4 is a black film.
  • the reflection structure layer 3 is a ring-shaped Fresnel reflection structure, which is composed of a plurality of concentric rings, and the cross-section of the ring is triangular (by the bottom surface of the reflection structure layer 3, the first incidence surface a, and the second incidence Face b is enclosed).
  • the glue-filled layer 2 is filled between the reflective structure layer 3 and the diffusion layer 1.
  • the glue-filled layer 2 and the reflective structure layer 3 together form a micro-structured reflective layer with both sides being planar.
  • the reflectance of the reflective structure layer 3 is set in a range of 10% to 35%, preferably in a range of 20% to 25%.
  • reducing the reflectivity of the reflective structure layer 3 will reduce the reflection of the projector light and ambient light at the same time, that is, reduce the gain of diffuse reflection.
  • the viewing angle of diffuse reflection is ⁇ 60 °
  • the reflectance is 100%, a screen effect with a gain of 1.0 can be achieved, and when the reflectance of the projection screen is reduced to 25%, the gain of diffuse reflection is The maximum is 0.25.
  • the present invention improves the gain of the reflective structure layer 3 having a reflectance in the range of 10% to 35% to a level greater than 1.0 by adding scattering particles to the reflective layer structure layer 3 and providing the diffusion layer 1.
  • the present invention can improve the screen's anti-ambient light contrast, ensure the light gain within the projection screen's scattering angle range, and effectively reduce the projection screen's reflection of ambient light.
  • the projector [alpha] l 1 of the projected light is incident to the angle (l 1 projected light is incident medium 2 n 2 n in the medium in the projection screen where the angle between the normal of the plane, hereinafter Incident angle for short), ⁇ is the angle at which the projection light l 1 of the projector is reflected into the medium n 2 (the angle between the reflected light l 1 in the medium n 2 and the normal to the plane on which the projection screen is located, which is abbreviated hereinafter Exit angle), ⁇ 1 is the angle between the first incident surface a of the reflective structure layer 3 and the plane on which the projection screen is located, and ⁇ 2 is the angle between the second incident surface b of the reflective structure layer 3 and the plane on which the projection screen is located
  • Figure 3 shows the distribution of a projector. At this time, ⁇ 2 is fixed, and the angle range of ⁇ 1 varies from 5 ° to 30 °.
  • ⁇ 2 is preferably 70 ° -90 °.
  • the material of the reflective structure layer 3 is described below.
  • the reflective structure layer 3 is cured by a reflective curing glue.
  • the reflection curing glue comprises the following components in parts by weight:
  • the reflection curing adhesive auxiliary agent includes a dispersant, a leveling agent, an antifoaming agent, and a polymerization inhibitor.
  • the reflection curable glue main body includes the following components in parts by weight:
  • the main body of the reflection curing glue is 50-70 parts by weight, wherein the acrylic resin / vinyl resin is 25-35 parts by weight, and the diluent is 25-35 parts by weight.
  • the reflection curable glue body includes an acrylate resin and a diluent.
  • the doped particles include the following components in parts by weight:
  • Scattering particles 0.5-5 parts by weight.
  • the reflection curing adhesive assistant comprises the following components in parts by weight:
  • the acrylate resin is one or more of urethane acrylate, polyester acrylate, polyether acrylate, and epoxy acrylate (oligomer).
  • the acrylate resin may be replaced by a vinyl resin (UPE).
  • the diluent is phenoxyethyl acrylate (POEA) or isobornyl methacrylate (IBOA) (monofunctional, ensuring a lower shrinkage rate after the structure is formed).
  • the aluminum silver powder may be a floating type or a non-floating type, and the aluminum silver powder is in a sheet shape and has a particle diameter of 1 ⁇ m to 5 ⁇ m, and preferably 1 ⁇ m to 3 ⁇ m.
  • the scattering particles are one or more of nano titanium dioxide, nano silicon dioxide, and ultra-fine calcium carbonate.
  • the carbon black is one of aniline black, carbon black particles, and iron black, and the particle diameter is preferably 1 ⁇ m.
  • the UV absorption peak of the 184 photoinitiator (1-hydroxycyclohexylphenyl ketone, HCPK for short) is 240 nm-250 nm or 320 nm-335 nm.
  • the UV absorption peak of the 819 photoinitiator (phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide) is 365nm-400nm.
  • the dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, sodium silicate, and fatty alcohol.
  • the leveling agent is a silicone type or a fluorocarbon type.
  • the defoaming agent is one or more of ethanol, n-butanol, silicone ester, and mineral oil.
  • the polymerization inhibitor is one or more of phenothiazine, p-hydroxyanisole, hydroquinone, phenylnaphthylamine, and p-tert-butylcatechol.
  • the material of the glue-filled layer 2 is described below.
  • the glue-filled layer 2 is made of transparent curing glue.
  • the transparent curing glue includes the following components in parts by weight:
  • the transparent curing adhesive auxiliary agent includes a defoaming agent, a leveling agent, and a polymerization inhibitor.
  • the transparent curing glue main body includes the following components in parts by weight:
  • the main body of the transparent curing glue is 85-95 parts by weight, wherein the acrylic resin / vinyl resin is 40-45 parts by weight, and the diluent is 45-50 parts by weight.
  • the acrylate resin is one or more of urethane acrylate, polyester acrylate, polyether acrylate, and epoxy acrylate (oligomer).
  • the diluent is phenoxyethyl acrylate (POEA) or isobornyl acrylate (IBOA) (monofunctional, ensuring a lower shrinkage rate after the structure is formed).
  • the UV absorption peak of the 184 photoinitiator (1-hydroxycyclohexylphenyl ketone, HCPK for short) is 240 nm-250 nm or 320 nm-335 nm.
  • the UV absorption peak of the 819 photoinitiator (phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide) is 365nm-400nm.
  • the leveling agent is a silicone type or a fluorocarbon type.
  • the defoaming agent is one or more of ethanol, n-butanol, silicone ester, and mineral oil.
  • the polymerization inhibitor is one or more of phenothiazine, p-hydroxyanisole, hydroquinone, phenylnaphthylamine, and p-tert-butylcatechol.
  • FIG. 4 is a schematic diagram of the production process of the reflective structure layer of the present invention
  • FIG. 5 is a schematic diagram of the production process of the glue filling layer of the present invention
  • FIG. 6 is a schematic diagram of the production process of the diffusion layer of the present invention. The method for preparing the projection screen in the present invention is described below with reference to the drawings.
  • the reflection-curing adhesive coated on the substrate 4 is processed into a ring-shaped Fresnel reflection structure through a roll-to-roll transfer process.
  • the roll-to-roll transfer process can use Hard Mold (Soft Mold) or Soft Mold (Soft Mold). ) Method, the method in Figure 4 is Hard Mold.
  • the first UV curing device 5 brings the reflective curing glue to a semi-cured state.
  • the UV peak range of the first UV curing device 5 is 240 nm-340 nm (UVC to UVB), and the minimum energy is not lower than 150 mj / cm 2 .
  • the 184 photoinitiator in the reflection curing adhesive can completely react, so that a chain reaction occurs between the oligomer and the monofunctional monomer.
  • the coating device 6 is used to coat the transparent curing glue on the semi-cured reflective structure layer 3, and the second UV curing device 7 is used to bring the glue filling layer 2 to a semi-cured state, and the reflective structure layer 3 to a fully cured state.
  • the coating can be performed by roller coating, doctor blade, air knife, doctor roller, gravure, slit, micro-concave, etc .; the range of the UV peak of the second UV curing device 7 is 360nm-400nm (UVA ), In this wavelength band, the 819 photoinitiator in the transparent curing adhesive and the reflective curing adhesive will completely react, and chain polymerization will occur at the same time, which can ensure that the reflective structure layer 3 and the glue filling layer 2 fill seamlessly.
  • UVA 360nm-400nm
  • a part of the oligomer and monofunctional monomer that does not participate in the reaction and the 184 photoinitiator that does not participate in the reaction in the UVA band are left in the transparent curing glue, so that the transparent curing glue is in a semi-cured state and has good physical properties.
  • the diffusion layer 1 is made of transparent curing glue. Specifically, the transparent curing glue is coated on the semi-cured reflective structure layer 3, and then a diffusion structure is processed by a roll-to-roll transfer process, and the roll-to-roll transfer process can use Hard Mold or Hard Mold. Soft Mold mode, the method in Figure 6 is Hard Mold.
  • the curing of the diffusion layer 1 is performed in two steps. In the first step, the diffusion layer 1 is brought to a semi-cured state by a first UV curing device 5, and the glue-filled layer 2 is brought to a fully cured state, and then demolded.
  • the diffusion layer 1 is completely cured by the second UV curing device 7.
  • the incompletely reacted 819 photoinitiator, residual oligomer, and monofunctional diluent in the diffusion layer 1 are almost completely consumed to ensure the final product.
  • Good physical properties (wear resistance, scratch resistance, hardness, adhesion, etc.).
  • the glue-filled layer 2, the reflective structure layer 3, and the diffusion layer 1 can reach a semi-cured state or a fully cured state, due to the influence of various factors, a small amount may remain in the projection screen.
  • the photoinitiator, acrylate resin, and diluent that did not react may also be due to the complete reaction of the photoinitiator, acrylate resin, and diluent. There is no photoinitiator, acrylate resin, and diluent in the projection screen.
  • the reflection curing glue and the transparent curing glue require two different wavelengths of light to be irradiated respectively to be completely cured.
  • one kind of light is irradiated
  • the reflection curing glue can only be made semi-cured. After the reflection curing glue is semi-cured, it is not only conducive to the coating of the transparent curing glue, but also the combination of the transparent curing glue and the reflection curing glue.
  • the present invention also provides a method for manufacturing a projection screen as described above, the method includes:
  • the second UV curing device is used to cure the diffusion layer to form a projection screen.
  • the present invention adds two photoinitiators to the reflective curing adhesive and the transparent curing adhesive, and adopts a secondary curing method to make the substrate, the microstructure reflective layer, and the diffusion layer constituting the projection screen tight.
  • the combination greatly reduces the thickness of the product, realizes the production of ultra-thin projection light curtain, and reduces the production cost.
  • the production process of the projection screen does not require a large amount of organic solvent mixture, which does not cause VOC emissions, which is in line with existing processes. More environmentally friendly and safe.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

一种反射固化胶、透明固化胶、投影屏幕及其制备方法，所述投影屏幕包含依次层叠的基底、微结构反射层以及扩散层，所述微结构反射层包含反射结构层和胶水填充层，所述反射结构层的材质为反射固化胶；所述胶水填充层和扩散层的材质为透明固化胶。本发明通过在反射固化胶和透明固化胶中添加两种光引发剂，并采用二次固化的方式，使得组成投影屏幕的基底、微结构反射层以及扩散层之间能够紧密结合，大大降低了产品的厚度，实现了超薄投影抗光幕的制作，降低了生产成本；另外，投影屏幕的生产过程中无需大量有机溶剂混合物，不会造成VOC排放，与现有工艺相比更加环保安全。

Description

反射固化胶、透明固化胶、投影屏幕及其制备方法 技术领域
本发明涉及一种反射固化胶、透明固化胶、投影屏幕及其制备方法，属于显示屏幕制造技术领域。
背景技术
超短焦投影的使用中，传统的白色屏幕容易受到环境光的干扰，在明亮的客厅灯光环境下画面的对比度不高，不能很好的展示色彩。要提高画面的对比度需要降低对环境光的反射率，同时尽量保持屏幕的增益。
现有的菲涅尔结构抗光幕通常由扩散层、上层基底层、贴合胶水层、下层基底层以及反射层依次层叠而成，为保证工艺稳定性，扩散层厚度一般为5μm-10μm，上层基底层厚度为50μm-250μm，贴合胶水层厚度为5μm-10μm，下层基底层为50μm-250μm，反射层厚度为110μm-250μm，上述结构使得抗光幕的整体厚度高达220μm-770μm。除上述结构外，部分抗光幕还包含体扩散层及灰色吸收层，此时，抗光幕的整体厚度甚至能达到2mm。
另外，现有的反射层的形成工艺主要为喷涂或丝印等各种涂布方式，此种工艺必然会使用大比例的有机溶剂混合物，例如无水丙酮、无水二甲苯、无水环已酮、无水丁酮、乙酸乙酯和无水醋酸丁醋等。此类溶剂在生产过程及后续干燥中均会造成挥发性有机化合物(VOC)排放，对环境及人员的身体健康产生威胁。
发明内容
本发明所要解决的技术问题在于针对现有技术的不足，提供一种反射固化胶、透明固化胶、投影屏幕及其制备方法，通过在反射固化胶和透明固化胶中添加两种光引发剂，并采用二次固化的方式，使得 组成投影屏幕的基底、微结构反射层以及扩散层之间能够紧密结合，大大降低了产品的厚度，实现了超薄投影抗光幕的制作，降低了生产成本；另外，投影屏幕的生产过程中无需大量有机溶剂混合物，不会造成VOC排放，与现有工艺相比更加环保安全。
本发明所要解决的技术问题是通过如下技术方案实现的：
本发明提供一种反射固化胶，所述反射固化胶用于在投影屏幕的基底上形成反射结构层，所述反射固化胶包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000001
所述反射固化胶助剂包含分散剂、流平剂、消泡剂、阻聚剂。
所述184光引发剂的UV吸收峰值为240nm-250nm或320nm-335nm；所述819光引发剂的UV吸收峰值为365nm-400nm。
所述反射固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂15-35重量份
稀释剂                15-35重量份。
优选地，所述反射固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂25-35重量份
稀释剂                25-35重量份。
所述掺杂粒子包含按重量份计的如下组分：
铝银粉               10-20重量份
炭黑                 10-25重量份
散射粒子             0.5-5重量份。
所述反射固化胶助剂包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000002
本发明还提供一种透明固化胶，用于在如上所述的反射结构层上形成胶水填充层，以及在所述胶水填充层上形成反射层，所述透明固化胶包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000003
所述透明固化胶助剂包含消泡剂、流平剂、阻聚剂。
所述184光引发剂的UV吸收峰值为240nm-250nm或320nm-335nm；所述819光引发剂的UV吸收峰值为365nm-400nm。
所述透明固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂 30-50重量份
稀释剂                30-50重量份。
优选地，所述透明固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂 40-45重量份
稀释剂                45-50重量份。
本发明还提供一种投影屏幕，所述投影屏幕包含依次层叠的基底、微结构反射层以及扩散层，所述微结构反射层包含反射结构层和胶水填充层，所述反射结构层的材质为如上所述的反射固化胶；所述胶水填充层和扩散层的材质为如上所述的透明固化胶。
为了降低了产品的厚度，所述基底的厚度为50μm-250μm，微结构反射层的厚度为100μm，扩散层的厚度为5μm-10μm。
为了提高环境光的对比度，所述反射结构层的反射率为10％-35％；优选为20％-25％。
本发明还提供一种投影屏幕的制备方法，所述投影屏幕为如上所述的投影屏幕，所述制备方法包括：
S1：在基底上涂布反射固化胶，将反射固化胶加工成菲涅尔反射结构的同时，采用第一UV固化装置固化，以形成半固化的反射结构层，其中，第一UV固化装置的UV波峰的范围为240nm-340nm；
S2：在半固化的反射结构层上涂布透明固化胶后，采用第二UV 固化装置固化，以形成半固化的胶水填充层以及完全固化的反射结构层，其中，第二UV固化装置的UV波峰的范围为360nm-400nm；
S3：在半固化的胶水填充层上涂布透明固化胶，将透明固化胶加工成扩散结构的同时，采用所述第一UV固化装置固化，以形成半固化的扩散层以及完全固化的胶水填充层，之后进行脱模；
S4：采用第二UV固化装置固化扩散层，以形成投影屏幕。
综上所述，本发明通过在反射固化胶和透明固化胶中添加两种光引发剂，并采用二次固化的方式，使得组成投影屏幕的基底、微结构反射层以及扩散层之间能够紧密结合，大大降低了产品的厚度，实现了超薄投影抗光幕的制作，降低了生产成本；另外，投影屏幕的生产过程中无需大量有机溶剂混合物，不会造成VOC排放，与现有工艺相比更加环保安全。
下面结合附图和具体实施例，对本发明的技术方案进行详细地说明。
附图说明
图1为本发明投影屏幕的结构剖视图；
图2为本发明投影屏幕对投影机光线进行准直的原理示意图；
图3为本发明反射结构层的半径与第一入射面以及第二入射面的关系示意图；
图4为本发明反射结构层的生产工艺示意图；
图5为本发明胶水填充层的生产工艺示意图；
图6为本发明扩散层的生产工艺示意图。
具体实施方式
图1为本发明投影屏幕的结构剖视图；图2为本发明投影屏幕对投影机光线进行准直的原理示意图；图3为本发明反射结构层的半径与第一入射面以及第二入射面的关系示意图。如图1至图3所示，本发明提供一种投影屏幕，所述投影屏幕包含依次层叠的基底4、微结构反射层以及扩散层1，所述微结构反射层包含反射结构层3和胶水填充 层2，其中，所述基底4的厚度为50μm-250μm，微结构反射层的厚度为100μm，扩散层1的厚度为5μm-10μm；即本发明中投影屏幕的的厚度为155μm-360μm。
所述基底4可采用聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚氯乙烯(PVC)、聚甲基丙烯酸甲酯(PMMA)等有机材料，并通过挤出方式制成。优选地，为了增加基底4的吸收效率，所述基底4为黑色薄膜。
所述反射结构层3为环形的菲涅尔反射结构，其由多个同心的环形构成，所述环形的横截面为三角形(由反射结构层3的底面、第一入射面a以及第二入射面b围设而成)。所述胶水填充层2填充在反射结构层3与扩散层1之间，所述胶水填充层2和反射结构层3共同组成两侧均为平面的微结构反射层。
在本发明中，为了提高环境光的对比度，将反射结构层3的反射率设置为在10％-35％的范围内，优选为20％-25％的范围内。然而，降低反射结构层3的反射率会同时降低对投影机光线和环境光的反射，即降低漫反射的增益。具体来说，漫反射的观看视角为±60°时，如果反射率为100％，则能够实现增益为1.0的屏幕效果，而当投影屏幕的反射率降为25％的时候，漫反射的增益最高为0.25。因此为了使本发明中的反射结构层3仍然能够产生1.0左右的增益，另外本发明的反射层可实现±10°-±45°的散射角度，因此通过压缩可视角的方式来提高屏幕增益。对于观看电视的观看者来说，±20°-30°的散射角度已经能够满足一般家庭的观看需求。因此，本发明通过在反射层结构层3中加散射粒子以及设置扩散层1，将具有10％-35％范围内反射率的反射结构层3的增益提高到大于1.0的水平，另一方面，由于大部分环境光来自于天花板，而本发明中反射结构层3的散射角度比较小，大角度的环境入射光线会被反射结构层3反射向地板的方向，而不会通过漫反射而进入到观众的视场内，因此本发明能够提高屏幕的抗环境光对比度，在保证了投影屏幕散射角度范围内光增益的同时有效的降低投影屏幕对环境光的反射。
如图2所示，α为投影机的投影光线l 1入射至介质n 2中的角度(投影光线l 1入射时在介质n 2中与投影屏幕所在平面的法线之间的夹角， 下文简称入射角度)，β为投影机的投影光线l 1反射至介质n 2中的角度(投影光线l 1反射后在介质n 2中与投影屏幕所在平面的法线之间的夹角，下文简称出射角度)，θ 1为反射结构层3的第一入射面a与投影屏幕所在平面之间的夹角，θ 2为反射结构层3的第二入射面b与投影屏幕所在平面之间的夹角，图3为一种投影机摆放下的分布，此时θ 2固定，θ 1的角度范围在5°-30°的范围内变化。
当投影机和观众相对于投影屏幕的位置已知的情况下，投影机的入射角度α和反射到观众视场光线的角度β已知，此时，根据折射定律可以求出θ 1＝(α-β)/2。
为了使第二入射面b不反射投影机的投影光线l 1，同时使第二入射面b不会将环境光线l 2反射到观众的视场中，θ 2优选为70°-90°。
另外，当投影机和投影屏幕的相对位置固定的情况下，还可以计算出θ 1、θ 2随反射结构层3的半径的分布。根据图3可以看出，在投影机和投影屏幕的相对位置固定的情况下，为了使投影光的反射最优化，随着反射结构层3半径的增大，θ 2保持不变，而θ 1相应地增大。
下面对反射结构层3的材质进行介绍。所述反射结构层3由反射固化胶固化而成。所述反射固化胶包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000004
所述反射固化胶助剂包含分散剂、流平剂、消泡剂、阻聚剂。
其中，所述反射固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂 15-35重量份
稀释剂                 15-35重量份。
优选地，所述反射固化胶主体为50-70重量份，其中丙烯酸酯树脂/乙烯基树脂为25-35重量份，所述稀释剂为25-35重量份。
更优选地，所述反射固化胶主体包含丙烯酸酯树脂和稀释剂。
所述掺杂粒子包含按重量份计的如下组分：
铝银粉                10-20重量份
炭黑                  10-25重量份
散射粒子              0.5-5重量份。
所述反射固化胶助剂包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000005
具体来说，所述丙烯酸酯树脂为聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯、环氧丙烯酸酯中的一种或多种(齐聚物)。所述丙烯酸酯树脂也可以由乙烯基树脂(UPE)代替。
所述稀释剂为丙烯酸苯氧基乙脂(POEA)或者甲基丙烯酸异冰片酯(IBOA)(单官能，保证结构成型后较低的收缩率)。
所述铝银粉可以为浮型或非浮型，所述铝银粉为片状，粒径为1μm-5μm，优选为1μm-3μm。
所述散射粒子为纳米二氧化钛、纳米二氧化硅、超重细碳酸钙中的一种或多种。
所述炭黑为苯胺黑、炭黑颗粒、铁黑其中的一种，粒径优选为1μm。
所述184光引发剂(1-羟基环己基苯基甲酮，简称HCPK)的UV吸收峰值为240nm-250nm或320nm-335nm。
所述819光引发剂(苯基双(2,4,6-三甲基苯甲酰基)氧化膦)的UV吸收峰值为365nm-400nm。
所述分散剂为六偏磷酸钠、焦磷酸钠、硅酸钠、脂肪醇中的一种或多种。
所述流平剂为有机硅类或氟碳类。
所述消泡剂为乙醇、正丁醇、有机硅酯、矿物油中的一种或多种。
所述阻聚剂为吩噻嗪、对羟基苯甲醚、对苯二酚、苯基萘胺、对叔丁基邻苯二酚中的一种或多种。
下面对胶水填充层2的材质进行介绍。所述胶水填充层2由透明固化胶固化而成。所述透明固化胶包含按重量份计的如下组分：
Figure PCTCN2019076615-appb-000006
所述透明固化胶助剂包含消泡剂、流平剂、阻聚剂。
其中，所述透明固化胶主体包含按重量份计的如下组分：
丙烯酸酯树脂/乙烯基树脂 30-50重量份
稀释剂                 30-50重量份。
优选地，所述所述透明固化胶主体为85-95重量份，其中丙烯酸酯树脂/乙烯基树脂为40-45重量份，稀释剂为45-50重量份。
具体来说，所述丙烯酸酯树脂为聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯、环氧丙烯酸酯中的一种或多种(齐聚物)。
所述稀释剂为丙烯酸苯氧基乙脂(POEA)或者丙烯酸异冰片酯(IBOA)(单官能，保证结构成型后较低的收缩率)。
所述184光引发剂(1-羟基环己基苯基甲酮，简称HCPK)的UV吸收峰值为240nm-250nm或320nm-335nm。
所述819光引发剂(苯基双(2,4,6-三甲基苯甲酰基)氧化膦)的UV吸收峰值为365nm-400nm。
所述流平剂为有机硅类或氟碳类。
所述消泡剂为乙醇、正丁醇、有机硅酯、矿物油中的一种或多种。
所述阻聚剂为吩噻嗪、对羟基苯甲醚、对苯二酚、苯基萘胺、对叔丁基邻苯二酚中的一种或多种。
图4为本发明反射结构层的生产工艺示意图；图5为本发明胶水填充层的生产工艺示意图；图6为本发明扩散层的生产工艺示意图。下面结合附图对本发明中投影屏幕的制备方法进行介绍。
将涂布在基底4上的反射固化胶通过卷对卷转印工艺加工成环形的菲涅尔反射结构，所述卷对卷转印工艺可以采用Hard Mold(硬模)或Soft Mold(软模)的方式，图4中的方式为Hard Mold。在此过程中，第一UV固化装置5使反射固化胶达到半固化状态。具体来说，所述第一UV固化装置5的UV波峰的范围为240nm-340nm (UVC～UVB)，最低能量不低于150mj/cm 2。此波段下，反射固化胶中184光引发剂可完全反应，使齐聚物及单官能单体间发生链式反应；在184光引发剂反应完全的情况下，反射固化胶内会剩余一部分未参与反应的齐聚物和单官能单体及在UVC～UVB波段内不参与反应的819光引发剂，从而使得反射固化胶处于半固化状态，并具有良好的脱模效果及物理性能。
利用涂布装置6将透明固化胶涂布在半固化的反射结构层3上，并通过第二UV固化装置7使胶水填充层2达到半固化状态，反射结构层3达到完全固化状态。具体来说，所述涂布可采用辊涂、刮刀、气刀、刮辊、凹版、狭缝、微凹等方式；所述第二UV固化装置7的UV波峰的范围为360nm-400nm(UVA)，此波段下，透明固化胶和反射固化胶中的819光引发剂会完全反应，同时发生链式聚合，可保证反射结构层3和胶水填充层2之间无缝隙填充。透明固化胶内会剩余一部分未参与反应的齐聚物和单官能单体及在UVA波段内不参与反应的184光引发剂，从而使得透明固化胶处于半固化状态，并具有良好物理性能。
所述扩散层1由透明固化胶固化而成。具体来说，将透明固化胶涂布在半固化的反射结构层3上，之后通过卷对卷转印工艺加工出扩散结构，所述卷对卷转印工艺可以采用Hard Mold(硬模)或Soft Mold(软模)的方式，图6中的方式为Hard Mold。所述扩散层1的固化分两步进行，第一步，通过第一UV固化装置5使扩散层1达到半固化状态，胶水填充层2达到完全固化状态，之后进行脱模。此过程中，胶水填充层2和扩散层1中的透明固化胶的184光引发剂完全反应，使齐聚物及单官能单体间发生链式反应。第二步，通过第二UV固化装置7使扩散层1达到完全固化状态，扩散层1内的未完全反应的819光引发剂及剩余齐聚物、单官能稀释剂近似完全消耗，保证最终产品良好的物理性能(耐磨、抗刮、硬度、附着力等)。
需要说明的是，实际生产过程中，虽然胶水填充层2、反射结构层3以及扩散层1能够达到半固化状态或者完全固化状态，然而由于多种因素的影响，投影屏幕中仍可能残留有少量没有发生反应的光引 发剂、丙烯酸酯树脂及稀释剂等，也有可能由于光引发剂、丙烯酸酯树脂及稀释剂完全反应，投影屏幕中没有光引发剂、丙烯酸酯树脂及稀释剂。
本发明通过在反射固化胶和透明固化胶中加入两种光引发剂，使得反射固化胶和透明固化胶需要两种不同波长的光线分别照射才能完全固化，在此过程中，一种光线的照射只能使反射固化胶达到半固化状态，反射固化胶半固化后不仅有利于透明固化胶的涂布，还有利于透明固化胶和反射固化胶的结合，在另一种光线的照射下，反射固化胶中之前未固化的光引发剂与透明固化胶中的光引发剂同时固化，使胶水填充层2和反射结构层3结合紧密。
综上，本发明还提供一种如上所述的投影屏幕的制备方法，所述制备方法包含：
S1：在基底上涂布反射固化胶，将反射固化胶加工成菲涅尔反射结构的同时，采用第一UV固化装置固化，以形成半固化的反射结构层，其中，第一UV固化装置的UV波峰的范围为240nm-340nm；
S2：在半固化的反射结构层上涂布透明固化胶后，采用第二UV固化装置固化，以形成半固化的胶水填充层以及完全固化的反射结构层，其中，第二UV固化装置的UV波峰的范围为360nm-400nm；
S3：在半固化的胶水填充层上涂布透明固化胶，将透明固化胶加工成扩散结构的同时，采用所述第一UV固化装置固化，以形成半固化的扩散层以及完全固化的胶水填充层，之后进行脱模；
S4：采用第二UV固化装置固化扩散层，以形成投影屏幕。
综上所述，本发明通过在反射固化胶和透明固化胶中添加两种光引发剂，并采用二次固化的方式，使得组成投影屏幕的基底、微结构反射层以及扩散层之间能够紧密结合，大大降低了产品的厚度，实现了超薄投影抗光幕的制作，降低了生产成本；另外，投影屏幕的生产过程中无需大量有机溶剂混合物，不会造成VOC排放，与现有工艺相比更加环保安全。

Claims (15)

  1. 一种反射固化胶，其特征在于，所述反射固化胶用于在投影屏幕的基底上形成反射结构层，所述反射固化胶包含按重量份计的如下组分：
    Figure PCTCN2019076615-appb-100001
    所述反射固化胶助剂包含分散剂、流平剂、消泡剂、阻聚剂。
  2. 如权利要求1所述的反射固化胶，其特征在于，所述184光引发剂的UV吸收峰值为240nm-250nm或320nm-335nm；所述819光引发剂的UV吸收峰值为365nm-400nm。
  3. 如权利要求1所述的反射固化胶，其特征在于，所述反射固化胶主体包含按重量份计的如下组分：
    丙烯酸酯树脂/乙烯基树脂  15-35重量份
    稀释剂                   15-35重量份。
  4. 如权利要求3所述的反射固化胶，其特征在于，所述反射固化胶主体包含按重量份计的如下组分：
    丙烯酸酯树脂/乙烯基树脂  25-35重量份
    稀释剂                   25-35重量份。
  5. 如权利要求1所述的反射固化胶，其特征在于，所述掺杂粒子包含按重量份计的如下组分：
    铝银粉                10-20重量份
    炭黑                  10-25重量份
    散射粒子              0.5-5重量份。
  6. 如权利要求1所述的反射固化胶，其特征在于，所述反射固化胶助剂包含按重量份计的如下组分：
    Figure PCTCN2019076615-appb-100002
  7. 一种透明固化胶，其特征在于，用于在如权利要求1所述的反射结构层上形成胶水填充层，以及在所述胶水填充层上形成反射层，所述透明固化胶包含按重量份计的如下组分：
    Figure PCTCN2019076615-appb-100003
    所述透明固化胶助剂包含消泡剂、流平剂、阻聚剂。
  8. 如权利要求7所述的透明固化胶，其特征在于，所述184光引发剂的UV吸收峰值为240nm-250nm或320nm-335nm；所述819光引发剂的UV吸收峰值为365nm-400nm。
  9. 如权利要求7所述的透明固化胶，其特征在于，所述透明固化胶主体包含按重量份计的如下组分：
    丙烯酸酯树脂/乙烯基树脂  30-50重量份
    稀释剂                   30-50重量份。
  10. 如权利要求9所述的透明固化胶，其特征在于，所述透明固化胶主体包含按重量份计的如下组分：
    丙烯酸酯树脂/乙烯基树脂  40-45重量份
    稀释剂                   45-50重量份。
  11. 一种投影屏幕，其特征在于，所述投影屏幕包含依次层叠的基底、微结构反射层以及扩散层，所述微结构反射层包含反射结构层和胶水填充层，所述反射结构层的材质为如权利要求1至6任意一项所述的反射固化胶；所述胶水填充层和扩散层的材质为如权利要求7至10任意一项所述的透明固化胶。
  12. 如权利要求11所述的投影屏幕，其特征在于，所述基底的厚度为50μm-250μm，微结构反射层的厚度为100μm，扩散层的厚度为5μm-10μm。
  13. 如权利要求11所述的投影屏幕，其特征在于，所述反射结构层的反射率为10％-35％。
  14. 如权利要求13所述的投影屏幕，其特征在于，所述反射结构层的反射率为20％-25％。
  15. 一种投影尔屏幕的制备方法，其特征在于，所述投影屏幕为权利要求11中所述的投影屏幕，所述制备方法包括：
    S1：在基底上涂布反射固化胶，将反射固化胶加工成菲涅尔反射结构的同时，采用第一UV固化装置固化，以形成半固化的反射结构层，其中，第一UV固化装置的UV波峰的范围为240nm-340nm；
    S2：在半固化的反射结构层上涂布透明固化胶后，采用第二UV固化装置固化，以形成半固化的胶水填充层以及完全固化的反射结构层，其中，第二UV固化装置的UV波峰的范围为360nm-400nm；
    S3：在半固化的胶水填充层上涂布透明固化胶，将透明固化胶加工成扩散结构的同时，采用所述第一UV固化装置固化，以形成半固化的扩散层以及完全固化的胶水填充层，之后进行脱模；
    S4：采用第二UV固化装置固化扩散层，以形成投影屏幕。
PCT/CN2019/076615 2018-08-28 2019-03-01 反射固化胶、透明固化胶、投影屏幕及其制备方法 WO2020042561A1 (zh)

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