An anti-aging polarized light shielding device, its preparation method and application, and a head-up display panel

Abstract

The present invention provides an anti-aging polarized light shielding device, a preparation method and an application thereof, and a head-up display panel. The anti-aging polarized light shielding device includes a stain-proof and hardening layer, a light anti-aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balance layer which are laminated in sequence. When the anti-aging polarized light shielding device is applied to a head-up display panel, it can ensure the emission intensity of the light source (polarized light) of the head-up display image, and still ensure the color uniformity even when the installation optical axis accuracy is poor. At the same time, it can also shield the burning damage of external visible light to internal optical devices, shield and hide internal optical devices, and significantly improve the scratch resistance and anti-fouling ability, and fully ensure the fitting performance of the curved surface.

Description

Technical Field

[0001] The present invention relates to the technical field of head-up display panels, and particularly relates to an anti-aging polarization light-shielding device, a preparation method and application thereof, and a head-up display panel. Background Art

[0002] A head-up display (HUD) system, also known as a parallel display system, is used to project important driving information such as speed and navigation onto the windshield in front of the driver or other display devices, so that the driver can see important driving information such as speed and navigation without lowering or turning the head as much as possible. The polarizer is an indispensable raw material for liquid crystal display panels. It has a thin thickness. In addition to high requirements for the performance of the polarizer itself, there are also certain requirements for the light transmittance, stability, durability, weather resistance, etc. of the optical adhesive, absorption layer, and hardening layer used for the polarizer.

[0003] Particularly, the curved screen has a beautiful appearance. In the front view, a very high screen-to-body ratio can be obtained. However, in the four corner regions where the curved surfaces intersect, there are curved surfaces with a certain spherical angle. The stress and strain in this region are unevenly distributed in the two-dimensional direction and are anisotropic. If the composite properties of the optical adhesive, absorption layer, and hardening layer used for the polarizer are poor, it will lead to serious problems such as fitting wrinkles, insufficient contact, easy delamination, and easy generation of voids. In the existing market, the hardness of the use layer of the polarization light-shielding device is generally not very high, and it is easy to produce scratches when subjected to friction or relatively large impacts. The overall structure has poor curing strength, and its stability, durability, anti-aging property, etc. are relatively poor, resulting in a short service life. In addition, most of the polarizers available on the market are for indoor use conditions, without considering harsh conditions such as strong ultraviolet rays outdoors and high temperatures under direct sunlight in the car, thus limiting the application of the polarizer.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-aging polarization light-shielding device, a preparation method and application thereof, and a head-up display panel. The anti-aging polarization light-shielding device is applied to the head-up display panel, which can ensure the output intensity of the head-up display image light source (polarized light), and still ensure the color uniformity even when the installation optical axis accuracy is poor. At the same time, it can also shield the internal optical devices from damage by external visible light, shield and hide the internal optical devices, and significantly improve the anti-scratch and anti-dirtying capabilities, and fully ensure the fitting performance of the curved surface. The present invention aims to improve the anti-aging property of the polarizer and enhance its shape retention property in the case of a curved surface.

[0006] In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:

[0007] In a first aspect, the present invention provides an anti-aging polarized light-shielding device, which comprises a stain-resistant hardening layer, a light-aging resistant layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer, and a thermal expansion balance layer stacked in sequence;

[0008] Among them, the stain-resistant hardening layer comprises a composite acrylic resin and a stain-resistant additive with a mass ratio of 100:(0.1~10).

[0009] Preferably, the raw materials for preparing the composite acrylic resin include, by weight: 5~15 parts of pentaerythritol triacrylate, 15~25 parts of isobornyl acrylate, 25~35 parts of polyurethane acrylate, 1~10 parts of tetraethylene glycol diacrylate, 10~20 parts of tetrahydrofurfuryl acrylate, N,N 10~20 parts of N,N-dimethylacrylamide, and 0.5~3 parts of a photoinitiator.

[0010] Preferably, the stain-resistant additive includes a fluoropolymer.

[0011] Preferably, the photoinitiator is selected from any one or a combination of at least two of benzophenone, 2-isopropylthioxanthone, dimethylbenzoyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, or 2-benzyl-2-dimethylamino-1-(4-morpholinobenzylphenyl)butanone.

[0012] Preferably, the composite acrylic resin further comprises 0.5~3 parts of an antioxidant.

[0013] Preferably, the antioxidant is selected from any one or a combination of at least two of pentaerythritol tetra β (3,5-di-tert-butyl-4-hydroxyphenyl)propionate, dilauryl thiodipropionate, dipentaerythritol distearyl diphosphite, tetra(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphonate, or dilauryl thiodipropionate.

[0014] Preferably, the stain-resistant additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosiloxane, bis(trimethoxysilylpropylcarbamate)perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane, or perfluorooctyltrimethoxysilane.

[0015] Preferably, the thickness of the stain-resistant hardening layer is 1~15μm.

[0016] Preferably, the raw materials for preparing the anti-photoaging layer include, by weight: 10-20 parts of polyhydroxy acrylic resin, 1-10 parts of isocyanate curing agent, 0-20 parts of infrared absorber, 1-10 parts of ultraviolet absorber, 0.1-5 parts of surfactant, and 60-80 parts of composite solvent.

[0017] Preferably, the composite solvent includes a large molecular weight solvent and a small molecular weight solvent with a mass ratio of (8.5-9.8):(0.2-1.5).

[0018] Preferably, the large molecular weight solvent includes N any one or a combination of at least two of N-methyl-2-pyrrolidone, cyclohexanone or xylene.

[0019] Preferably, the small molecular weight solvent includes any one or a combination of at least two of isopropyl alcohol, methyl ethyl ketone or ethyl acetate.

[0020] Preferably, the surfactant is selected from any one or a combination of at least two of alkyl sulfates with 12 or more carbon atoms, linear alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkylphenols, linear alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes or polyureas.

[0021] Preferably, the hydroxyl value of the polyhydroxy acrylic resin is 10-150 mgKOH / g.

[0022] Preferably, the polyhydroxy acrylic resin is selected from any one or a combination of at least two of HU840K from Laiyang Hong'an, HA865 from Kunshan Kaster, LR7601 from Mitsubishi or DS-2055 resin from Nantong Baisen Chemical Industry.

[0023] Preferably, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate.

[0024] Preferably, the isocyanate curing agent is selected from any one or a combination of at least two of N3300 of BASF HDI type, XP2400 of BASF IPDI type, HDI 200 of Wanhua, IPDI 200 of Wanhua, L75 of Covestro HDI type or I100 of Covestro IPDI type.

[0025] Preferably, the infrared absorber includes an organic dye and a metal oxide with a mass ratio of (0.05-2):(8-10).

[0026] Preferably, the organic dye is selected from indole-based near-infrared fluorescent organic dyes, and the metal oxide is selected from nano rare earth metal oxide powders.

[0027] Preferably, the organic dye is selected from any one or a combination of at least two of IR780, IR820, IR956, IR1008 or IR1086.

[0028] Preferably, the particle size of the nano rare earth metal oxide powder is 20 - 50 nm.

[0029] Preferably, the specific surface area of the nano rare earth metal oxide powder is 30 - 60 m 2 / g.

[0030] Preferably, the metal oxide is selected from any one or a combination of at least two of tungsten oxide, tungsten cesium oxide, tungsten gold vanadium oxide, tungsten vanadium tin antimony oxide, cesium tungsten bronze.

[0031] Preferably, the ultraviolet absorber is selected from any one or a combination of at least two of benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers or phenylbenzimidazole ultraviolet absorbers.

[0032] Preferably, the benzotriazole ultraviolet absorber is selected from any one or a combination of at least two of UV326, UV327, UV329 or UVP.

[0033] Preferably, the triazine ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 400, Tinuvin 405 or UV-1577.

[0034] Preferably, the phenylbenzimidazole ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 328, Tinuvin360 or UV-1226.

[0035] Preferably, the thickness of the anti-photoaging layer is 5 - 30 μm.

[0036] Preferably, the substrate layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is > 85%.

[0037] Preferably, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP or PMMA.

[0038] Preferably, the thickness of the substrate layer is 75 - 200 μm.

[0039] Preferably, the raw materials for preparing the first OCA layer and the second OCA layer each include, by weight: 100 parts of a highly transparent acrylic resin, 0.5 - 2 parts of an epoxy resin, 0.5 - 2 parts of a water-blocking material, and 0.1 - 1 part of an antioxidant.

[0040] Preferably, the light transmittance of the high-transparency acrylic resin is 85-93%.

[0041] Preferably, the high-transparency acrylic resin includes SAPSA8087 from Ningbo Lihe Bohui, UVR2002 from Shanghai Feikai Materials, the polarizer special adhesive from Shenzhen Jialin Special Materials, etc.

[0042] Preferably, the epoxy resin includes 604 from Jiangsu Sanmu, NPEL-128 and NPES-901 from Nanya Kunshan, YN1827 from Yangnong Jinhu, etc.

[0043] Preferably, the water-blocking material is selected from nano-inorganic particles.

[0044] Preferably, the nano-inorganic particles include any one or a combination of at least two of nano-zinc oxide, nano-silica, nano-zirconia or cellulose nanocrystals.

[0045] Preferably, the antioxidant is selected from any one or a combination of at least two of methyl silicone, hexapentyl phosphite triamide or dialkyl phosphite.

[0046] Preferably, the thickness ratio of the first OCA layer to the second OCA layer is 1:(1-1.25).

[0047] Preferably, the thickness of the first OCA layer is 10-100 μm, and the thickness of the second OCA layer is 10-125 μm.

[0048] Preferably, the polarizer includes a polarizer grating layer and protective film layers on the upper and lower surfaces of the polarizer grating layer.

[0049] Preferably, the polarizer grating layer includes polyvinyl alcohol and a high-temperature-resistant dichroic pigment with a mass ratio of 100:(1-10); the protective film layer includes triacetyl cellulose.

[0050] Preferably, the protective film layer includes triacetyl cellulose.

[0051] Preferably, the high-temperature-resistant dichroic pigment includes any one or a combination of at least two of bis-azo dichroic dyes, anthraquinone dichroic dyes, triazine and derivative dichroic dyes, monomethine dichroic dyes or polymethine dichroic dyes.

[0052] Preferably, the thickness of the polarizer is 100-200 μm.

[0053] Preferably, the thickness of the polarizer grating layer is 20-100 μm, and the thicknesses of the protective film layers on the upper and lower surfaces of the polarizer grating layer are independently 20-50 μm.

[0054] Preferably, the thermal expansion balance layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is >85%.

[0055] Preferably, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP or PMMA.

[0056] In a second aspect, the present invention provides a method for preparing an anti-aging polarized light shielding device as described in the first aspect, and the preparation method comprises the following steps:

[0057] Mix the components in the preparation raw materials of the anti-photoaging layer to obtain a first slurry; mix the components in the antifouling and hardening layer to obtain a second slurry; first apply the first slurry on the surface of the substrate layer, and after thermal curing, form the anti-photoaging layer, and then apply the second slurry on the surface of the anti-photoaging layer, and after light curing, form the antifouling and hardening layer to obtain a first composite;

[0058] Mix the components in the preparation raw materials of the first OCA layer to obtain a first adhesive; mix the components in the preparation raw materials of the second OCA layer to obtain a second adhesive; apply the first adhesive and the second adhesive on the upper and lower surfaces of the polarizer respectively to obtain a second composite;

[0059] Bond the uncoated side of the first composite to the side of the polarizer coated with the first adhesive, and bond the thermal expansion balance layer to the side of the polarizer coated with the second adhesive, and after curing and drying, obtain the anti-aging polarized light shielding device.

[0060] In a third aspect, the present invention provides an application of the anti-aging polarized light shielding device as described in the first aspect in the preparation of a head-up display panel.

[0061] In a fourth aspect, the present invention provides a head-up display panel, and the head-up display panel comprises the anti-aging polarized light shielding device as described in the first aspect.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] (1) The antifouling and hardening layer of the present invention contains a composite acrylic resin with a specific composition and ratio and adds a fluoropolymer as an antifouling and anti-fingerprint additive. Through the mutual cooperation of various acrylates, the compatibility is good, and a hardening coating with excellent formability can be formed, and its scratch resistance, wear resistance, chemical resistance, weather resistance and antifouling property are significantly improved.

[0064] (2) The anti-aging light layer of the present invention has a high ability to block the penetration of infrared and ultraviolet rays in sunlight, enabling it to have good absorption and blocking effects on near-infrared rays with a wide wavelength range. Moreover, the heat insulation performance, anti-ultraviolet performance, anti-yellowing performance, weather resistance performance, and light transmittance performance of the absorption coating are further improved, preventing the aging of organic substances and ensuring a long service life for the vehicle under direct sunlight.

[0065] (3) The optical film substrate of the present invention can improve the overall flame retardant effect of the anti-aging polarized light-shielding device and prevent water vapor from invading and damaging the materials of the polarizer.

[0066] (4) The first OCA layer of the present invention connects the substrate layer and the polarizer, and the second OCA layer connects the polarizer and the thermal expansion balance layer, providing excellent flexibility. Moreover, the OCA can also block the erosion of water vapor on the polarizer.

[0067] (5) The polarizer of the present invention is a dichroic pigment polarizer that can withstand sunlight exposure and high temperatures. The mixing uniformity of the pigment is excellent, and it can provide a non-uniform grating polarizer, which can improve the color reducibility when there is a polarization angle error.

[0068] (6) The thermal expansion balance layer of the present invention has a curved surface structure to ensure good curved surface fitting when applied to a head-up display. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0070] Figure 1 It is a schematic structural diagram of the anti-aging polarized light-shielding device of the present invention.

[0071] Among them, 1 is an anti-fouling and hardening layer, 2 is an anti-aging light layer, 3 is a substrate layer, 4 is a first OCA layer, 5 is a polarizer, 6 is a second OCA layer, and 7 is a thermal expansion balance layer.

[0072] Figure 2 It is a schematic structural diagram of the polarizer of the present invention.

[0073] Among them, 50 is a polarizer grating layer, and 51 is a protective film layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0074] Unless otherwise defined herein, scientific and technical terms used in connection with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meanings and scopes of the terms should be clear. However, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or extrinsic definition. In this application, unless otherwise specified, the use of "or" means "and / or". In addition, the use of the term "comprising" and other forms is non-restrictive.

[0075] It should be noted that specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0076] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0077] In a first aspect, the present invention provides an anti-aging polarized light shielding device, such as Figure 1 shown, the anti-aging polarized light shielding device includes a stain-resistant hardening layer 1, a light anti-aging layer 2, a substrate layer 3, a first OCA layer 4, a polarizer 5, a second OCA layer 6, and a thermal expansion balance layer 7 that are stacked in sequence.

[0078] In the present invention, the hardening layer of the anti-aging polarized light shielding device has excellent ability to prevent external physical damage and chemical solvent damage; the light anti-aging layer has excellent ability to prevent organic matter aging. For automobiles that require a long service life under direct sunlight, it can prevent the destruction of ultraviolet rays to the polymer materials in each layer, reduce problems such as yellowing, fogging, and powdering of the polymer materials under ultraviolet rays, and prevent the hardening effect of ultraviolet rays on the two OCA layers, resulting in problems such as a decrease in adhesion and film peeling during use; the optical film substrate can effectively improve the overall flame retardant effect and prevent water vapor from invading and damaging the materials of the polarizer; the first OCA layer connects the substrate layer and the polarizer, and the second OCA layer connects the polarizer and the thermal expansion balance layer, and provides a certain flexibility. The OCA can also block the erosion of water vapor to the polarizer; the polarizer can provide a non-uniform grating polarizer, which can improve the color reducibility when there is a polarization angle error; the thermal expansion balance layer can ensure good curved surface fitting.

[0079] As an optional implementation manner, the stain-resistant hardening layer includes a composite acrylic resin and a stain-resistant additive with a mass ratio of 100:(0.1~10).

[0080] As an alternative embodiment, the mass ratio of the composite acrylic resin to the antifouling additive is 100:(0.1~10), and can be, for example, 100:0.1, 100:0.5, 100:1, 100:2, 100:3, 100:4, 100:5, 100:6, 100:7, 100:8, 100:9, 100:10, etc.

[0081] As an alternative embodiment, the raw materials for preparing the composite acrylic resin include, by weight: 5~15 parts of pentaerythritol triacrylate, 15~25 parts of isobornyl acrylate, 25~35 parts of polyurethane acrylate, 1~10 parts of tetraethylene glycol diacrylate, 10~20 parts of tetrahydrofurfuryl acrylate, N,N 10~20 parts of N,N-dimethylacrylamide and 0.5~3 parts of photoinitiator.

[0082] In the present invention, PETA (pentaerythritol triacrylate): highest hardness, high crosslinking density; IBOA (isobornyl acrylate): relatively high hardness, rigid cyclic structure; PUA (polyurethane acrylate): medium to high hardness; TTEGDA (tetraethylene glycol diacrylate): medium hardness, bifunctional; THFA (tetrahydrofurfuryl acrylate): relatively low hardness, monofunctional; N,N-dimethylacrylamide: lowest hardness, monofunctional. The antifouling hardening layer of the present invention contains a multi-functional acrylic resin with a specific composition and ratio, and can form a hardening coating with excellent formability, well balancing the hardness and flexibility of the hardening layer, and significantly improving its scratch resistance, abrasion resistance, chemical resistance, weather resistance and antifouling property.

[0083] More specifically, the reason for the significant improvement in antifouling hardening performance is as follows: 1. Significantly increased crosslinking density: Each molecule of the multi-functional acrylic resin contains multiple reactive functional groups. During the photocuring process, these functional groups can undergo free radical polymerization or addition reactions with neighboring molecules to form more crosslinking points. When using resins with different functional degrees in combination, the high-functional degree components dominate the formation of a dense three-dimensional network, thereby improving the hardness and mechanical strength of the material. 2. Optimization of the three-dimensional network structure: The low-functional degree resin may provide a certain degree of chain segment flexibility, while the high-functional degree resin strengthens the crosslinking density. The combination of multiple types can achieve a balance between hardness and toughness, taking into account both hardness and flexibility, and is suitable for flexible electronic coatings. Moreover, the synergistic effect between the components can enhance the overall denseness. 3. Reaction kinetics advantage: Further improve the reaction activity, and quickly form an initial crosslinking network in the curing system, shortening the curing time. This rapid network formation effect can also reduce the residue of unreacted monomers and improve the conversion rate.

[0084] As an alternative embodiment, the content of pentaerythritol triacrylate in the raw materials for preparing the composite acrylic resin is 5 to 15 parts, such as 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0085] As an alternative embodiment, the content of isobornyl acrylate in the raw materials for preparing the composite acrylic resin is 15 to 25 parts, such as 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, etc.

[0086] As an alternative embodiment, the content of polyurethane acrylate in the raw materials for preparing the composite acrylic resin is 25 to 35 parts, such as 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, etc.

[0087] As an alternative embodiment, the content of tetraethylene glycol diacrylate in the raw materials for preparing the composite acrylic resin is 1 to 10 parts, such as 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0088] As an alternative embodiment, the content of tetrahydrofurfuryl acrylate in the raw materials for preparing the composite acrylic resin is 10 to 20 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0089] As an alternative embodiment, in the raw materials for preparing the composite acrylic resin N,N the content of N,N-dimethylacrylamide is 10 to 20 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0090] As an alternative embodiment, the content of the photoinitiator in the raw materials for preparing the composite acrylic resin is 0.5 to 3 parts, such as 0.5 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.8 parts, 3 parts, etc.

[0091] As an alternative embodiment, the anti-fouling additive includes a fluoropolymer.

[0092] In the present invention, adding a fluoropolymer as an anti-fouling and anti-fingerprint additive makes the surface resistant to solvent contamination such as acetone, alcohol, dishwashing liquid, sweat, coffee, and beverages.

[0093] As a preferred embodiment, the antifouling additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosiloxane, bis(trimethoxysilylpropyl carbamate) perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane or perfluorooctyltrimethoxysilane.

[0094] As an alternative embodiment, the photoinitiator is selected from any one or a combination of at least two of benzophenone, 2-isopropylthioxanthone, dimethylbenzoyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-one, 2-hydroxy-2-methyl-1-phenyl-1-propanone or 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl) butanone.

[0095] As an alternative embodiment, the composite acrylic resin further comprises: 0.5 to 3 parts of an antioxidant.

[0096] As an alternative embodiment, the antioxidant in the raw materials for preparing the composite acrylic resin is 0.5 to 3 parts, for example, it can be 0.5 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.8 parts, 3 parts, etc.

[0097] As an alternative embodiment, the antioxidant is selected from any one or a combination of at least two of β pentaerythritol tetrakis[[(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]], dilauryl thiodipropionate, pentaerythritol distearyl diphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosphite or dilauryl thiodipropionate.

[0098] As an alternative embodiment, the thickness of the antifouling and hardening layer is 1 to 15 μm, for example, it can be 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, etc.

[0099] As an alternative embodiment, the raw materials for preparing the anti-photoaging layer include, by weight parts: 10 to 20 parts of polyhydroxy acrylic resin, 1 to 10 parts of isocyanate curing agent, 0 to 20 parts of infrared absorber, 1 to 10 parts of ultraviolet absorber, 0.1 to 5 parts of surfactant, 60 to 80 parts of composite solvent.

[0100] As an optional embodiment, the content of the polyhydroxy acrylic resin in the raw materials for preparing the anti-photoaging layer is 10 to 20 parts, for example, it can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0101] As an optional embodiment, the content of the isocyanate curing agent in the raw materials for preparing the anti-photoaging layer is 1 to 10 parts, for example, it can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0102] In the present invention, a highly transparent polyhydroxy acrylic resin-isocyanate curing resin system is selected in the anti-photoaging layer, which has good wettability to the substrate. The polar groups generated by the reaction of the isocyanate further strengthen the interfacial bonding, and improve the interlayer bonding force between the anti-photoaging layer, the anti-fouling hardening layer and the substrate layer. At the same time, the combination of the ultraviolet resistance of the polyhydroxy acrylic resin and the anti-yellowing characteristics of the isocyanate can significantly improve the anti-photoaging ability of the anti-photoaging layer. In addition, after the polyhydroxy acrylic resin and the isocyanate are cured, a dense three-dimensional cross-linked network is formed, which can physically wrap the inorganic powder particles to prevent their migration or sedimentation. This coating effect further compacts the interface between the inorganic absorbent and the resin during the curing process. And the flexibility of the hybrid network system can relieve the interfacial stress caused by the difference in the thermal expansion coefficients of the inorganic absorbent and the resin, and reduce the generation of microcracks.

[0103] As an optional embodiment, the content of the infrared absorber in the raw materials for preparing the anti-photoaging layer is 0 to 20 parts, for example, it can be 0 parts, 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0104] As an optional embodiment, the content of the ultraviolet absorber in the raw materials for preparing the anti-photoaging layer is 1 to 10 parts, for example, it can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0105] As an optional embodiment, the content of the surfactant in the raw materials for preparing the anti-photoaging layer is 0.1 to 5 parts, for example, it can be 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0106] As an optional embodiment, the content of the composite solvent in the raw materials for preparing the anti-photoaging layer is 60 to 80 parts, for example, it can be 60 parts, 62 parts, 64 parts, 65 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 75 parts, 78 parts, 80 parts, etc.

[0107] As an alternative embodiment, the composite solvent comprises a large-molecular-weight solvent and a small-molecular-weight solvent in a mass ratio of (8.5 to 9.8):(0.2 to 1.5), for example, it can be 8.5:1.5, 8.6:1.4, 8.8:1.2, 9:1, 9.2:1.8, 9.4:1.6, 9.5:0.5, 9.6:0.4, 9.8:0.2, etc.

[0108] As an alternative embodiment, the large-molecular-weight solvent comprises N any one or a combination of at least two of N-methyl-2-pyrrolidone, cyclohexanone or xylene.

[0109] As an alternative embodiment, the small-molecular-weight solvent comprises any one or a combination of at least two of isopropanol, methyl ethyl ketone or ethyl acetate.

[0110] In the present invention, the specific large-molecular-weight solvent and small-molecular-weight solvent are preferably compounded in the above mass ratio, that is, a small amount of small-molecular-weight solvent is added to the large-molecular-weight solvent, so as to ensure that the large-molecular-weight solvent can better coat the small-molecular-weight solvent to form a more colloidal-like structure, and more effectively weaken the erosion of small molecules on large molecules, solving the problems of large haze, easy whitening of the solvent in the coating on the substrate corrosion part, the substrate is not resistant to UV and is prone to yellowing and powdering, and the coating has high viscosity and is prone to sagging, peeling, vertical streaks, etc.

[0111] As an alternative embodiment, the surfactant is selected from any one or a combination of at least two of alkyl sulfates with C12 or more, linear alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkyl phenols, linear alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes or polyureas.

[0112] As an alternative embodiment, the hydroxyl value of the polyhydroxy acrylic resin is 10 to 150 mgKOH / g, for example, it can be 10 mgKOH / g, 20 mgKOH / g, 30 mgKOH / g, 40 mgKOH / g, 50 mgKOH / g, 60 mgKOH / g, 70mgKOH / g, 80 mgKOH / g, 90 mgKOH / g, 100 mgKOH / g, 110 mgKOH / g, 120 mgKOH / g, 130 mgKOH / g, 140 mgKOH / g, 150 mgKOH / g, etc.

[0113] As an alternative embodiment, the polyhydroxy acrylic resin is selected from any one or a combination of at least two of HU840K from Laiyang Hong'an, HA865 from Kunshan Kaster, LR7601 from Mitsubishi or DS-2055 resin from Nantong Baisen Chemical Industry.

[0114] As an alternative embodiment, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate.

[0115] As an alternative embodiment, the isocyanate curing agent is selected from any one or a combination of at least two of N3300 of BASF HDI type, XP 2400 of BASF IPDI type, HDI 200 of Wanhua, IPDI 200 of Wanhua, L75 of Covestro HDI type or I100 of Covestro IPDI type.

[0116] As an alternative embodiment, the infrared absorber comprises an organic dye and a metal oxide in a mass ratio of (0.05 - 2):(8 - 10);

[0117] Among them, "0.05 - 2" can be, for example, 0.05, 0.08, 0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.6, 1.8, 2, etc.;

[0118] Among them, "8 - 10" can be, for example, 8, 8.2, 8.4, 8.5, 8.6, 8.8, 9, 9.2, 9.4, 9.6, 9.8, 10, etc.

[0119] In the present invention, it is preferred to use a specific ratio of the organic dye and the metal oxide in combination. The combination of the two can cover a wider infrared spectrum and is suitable for multi - band infrared absorption requirements. The compounding of the two can also further improve the thermal stability and light stability. The metal oxide can act as a carrier to reduce the direct exposure of dye molecules to the environment and extend the material life.

[0120] As an alternative embodiment, the organic dye is selected from indole - type near - infrared fluorescent organic dyes, and the metal oxide is selected from nano rare - earth metal oxide powders.

[0121] Preferably, the organic dye is selected from any one or a combination of at least two of IR780, IR820, IR956, IR1008 or IR1086.

[0122] As an alternative embodiment, the particle size of the nano rare - earth metal oxide powder is 20 - 50 nm, and can be, for example, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, etc.

[0123] As an alternative embodiment, the specific surface area of the nano rare - earth metal oxide powder is 30 - 60 m 2 / g, and can be, for example, 30 m 2 / g, 35 m 2 / g, 40 m 2 / g, 45 m 2 / g, 50 m 2 / g, 55 m 2 / g, 60 m 2 / g, etc.

[0124] As an optional embodiment, the metal oxide is selected from any one or a combination of at least two of tungsten oxide, tungsten cesium oxide, tungsten gold vanadium oxide, tungsten vanadium tin antimony oxide, and cesium tungsten bronze.

[0125] As an optional embodiment, the ultraviolet absorber is selected from any one or a combination of at least two of benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers, or phenylbenzimidazole ultraviolet absorbers.

[0126] As an optional embodiment, the benzotriazole ultraviolet absorber is selected from any one or a combination of at least two of UV326, UV327, UV329, or UVP.

[0127] As an optional embodiment, the triazine ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 400, Tinuvin 405, or UV-1577.

[0128] As an optional embodiment, the phenylbenzimidazole ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 328, Tinuvin360, or UV-1226.

[0129] As an optional embodiment, the thickness of the anti-photoaging layer is 5 - 30 μm, for example, it can be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20μm, 22 μm, 24 μm, 25 μm, 26 μm, 28 μm, 30 μm, etc.

[0130] As an optional embodiment, the substrate layer includes an optically highly transparent material, and the light transmittance of the optically highly transparent material is > 85%, for example, it can be 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0131] As an optional embodiment, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP, or PMMA.

[0132] As a preferred embodiment, the optically highly transparent material is PC. Considering the flame retardancy and optical effects of the vehicle, PC is preferably used.

[0133] As an optional embodiment, the thickness of the substrate layer is 75 to 200 μm, for example, it can be 75 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 171 μm, 172 μm, 173 μm, 174 μm, 175 μm, 176 μm, 177 μm, 178 μm, 179 μm, 180 μm, 190 μm, 200 μm, etc.

[0134] As an optional implementation, the raw materials for preparing the first OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 part of antioxidant.

[0135] As an optional embodiment, the content of epoxy resin in the raw materials for preparing the first OCA layer is 0.5~2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0136] As an optional embodiment, the content of water-blocking material in the raw materials for preparing the first OCA layer is 0.5~2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0137] As an optional embodiment, the content of antioxidant in the raw materials for preparing the first OCA layer is 0.1~1 part, for example, it can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0138] As a preferred embodiment, the raw materials for preparing the second OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 part of antioxidant.

[0139] As an optional embodiment, the content of epoxy resin in the raw materials for preparing the second OCA layer is 0.5 to 2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0140] As an optional implementation, the content of the water-blocking material in the preparation raw materials of the second OCA layer is 0.5 to 2 parts, for example, it can be 0.5 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0141] As an optional implementation, the content of the antioxidant in the preparation raw materials of the second OCA layer is 0.1 to 1 part, for example, it can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0142] In the present invention, the OCA layer is mainly composed of a high-transparency acrylic resin, which provides a certain flexibility. At the same time, a certain amount of epoxy resin is added to enhance the bonding force. To improve its aging resistance, a certain content of water-blocking material is also added, which can also block the erosion of water vapor on the polarizer.

[0143] As an optional implementation, the light transmittance of the high-transparency acrylic resin is 85 to 93%, for example, it can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, etc.

[0144] As an optional implementation, the high-transparency acrylic resin includes SAPSA8087 of Ningbo Lihe Bohui, UVR2002 of Shanghai Feikai Materials, polarizer special glue of Shenzhen Jialin Special Materials, etc.

[0145] As an optional implementation, the epoxy resin includes 604 of Jiangsu Sanmu, NPEL-128 and NPES-901 of Nanya Kunshan, YN1827 of Yangnong Jinhu, etc. As an optional implementation, in the preparation raw materials of the first OCA layer and / or the second OCA layer, the water-blocking material is selected from nano-inorganic particles.

[0146] As an optional implementation, the nano-inorganic particles include any one or a combination of at least two of nano-zinc oxide, nano-silica, nano-zirconia or cellulose nanocrystals.

[0147] As an optional implementation, in the preparation raw materials of the first OCA layer and / or the second OCA layer, the antioxidant is selected from any one or a combination of at least two of methyl silicone, hexamethyl phosphite triamide or dialkyl phosphite.

[0148] As a preferred implementation, the thickness ratio of the first OCA layer to the second OCA layer is 1:(1 to 1.25), for example, it can be 1:1, 1:1.05, 1:1.1, 1:1.15, 1:1.2, 1:1.25, etc.

[0149] As an optional embodiment, the thickness of the first OCA layer is 10 to 100 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc.

[0150] As an optional embodiment, the thickness of the second OCA layer is 10 to 125 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 125 μm, etc.

[0151] As an optional embodiment, as Figure 2 shown, the polarizer includes a polarizer grating layer 50 and protective film layers 51 located on the upper and lower surfaces of the polarizer grating layer.

[0152] As an optional embodiment, the polarizer grating layer includes polyvinyl alcohol and a high-temperature-resistant dichroic pigment with a mass ratio of 100:(1 to 10), for example, it can be 100:1, 100:2, 100:3, 100:4, 100:5, 100:6, 100:7, 100:8, 100:9, 100:10, etc.

[0153] As an optional embodiment, the degree of polymerization of the polyvinyl alcohol is 1000 to 9000, for example, it can be 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, etc.

[0154] As an optional embodiment, the saponification degree of the polyvinyl alcohol is ≥98% and <100%, for example, it can be 98%, 98.2%, 98.4%, 98.5%, 98.6%, 98.8%, 99%, 99.2%, 99.4%, 99.5%, 99.6%, 99.8%, 99.9%, etc.

[0155] As an optional embodiment, the molecular weight distribution of the polyvinyl alcohol is 1.5 to 2.5, for example, it can be 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, etc.

[0156] As an optional embodiment, the polyvinyl alcohol can be purchased from manufacturers such as Anhui Wanyuan High-Tech, Kuraray, and Nippon Chemical Synthesis, etc.

[0157] As an optional embodiment, the protective film layer includes triacetyl cellulose.

[0158] As an optional embodiment, the high-temperature-resistant dichroic pigment includes any one or a combination of at least two of bisazo dichroic dyes, anthraquinone dichroic dyes, triazine and derivative dichroic dyes, monomethine dichroic dyes, or polymethine dichroic dyes.

[0159] As an optional embodiment, the high-temperature-resistant dichroic pigment includes, by color parts, but is not limited to, red, blue, green, yellow, orange, purple, etc.; suppliers include, but are not limited to, Huacai Dye Business Department in Yuncheng District, Yunfu City, Guangdong Province, Nanjing Jialin, Nippon Shokubai, Sumitomo of Japan, etc.

[0160] As an optional embodiment, the thickness of the polarizer is 100 - 200 μm, for example, it can be 100 μm, 110 μm, 120 μm, 121 μm, 122 μm, 123 μm, 124 μm, 125 μm, 126 μm, 127 μm, 128 μm, 129 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, etc.

[0161] As an optional embodiment, the thickness of the polarizer grating layer is 20 - 100 μm, for example, it can be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc., and the thickness of the protective film layers on the upper and lower surfaces of the polarizer grating layer is independently 20 - 50 μm, for example, it can be 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, etc.

[0162] As an optional embodiment, the thermal expansion balance layer includes an optically highly transparent material, and the light transmittance of the optically highly transparent material is > 85%, for example, it can be 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0163] As an optional embodiment, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP, or PMMA.

[0164] It should be noted that since the thermal expansion rate of the polarizer is about 0.007%, the thermal expansion rate of PC is about 0.006%, and the thermal expansion rate of PET is about 0.004%. The thickness of the polarizers available in the market is generally about 200 μm, which is too soft. The overhead transparent panel is placed overhead and has a certain curvature, so the panel needs to have a certain stiffness. The selected thickness is between 375 and 500 μm. The polarizer needs to be thickened, and the thickening material is a film material of various high-transparency materials. However, the single-sided thickened material will curl and deform when heated. When installed in the head-up display, the single-sided material will bulge or twist in shape under the influence of sunlight and high temperature in the car. To avoid this situation, a thermal expansion balance layer material with the same thermal expansion rate as the first-layer thickened material needs to be set on the back based on the single-sided thickening.

[0165] In a second aspect, the present invention provides a method for preparing an anti-aging polarization light-shielding device as described in the first aspect. The preparation method includes the following steps:

[0166] Mix the components in the preparation raw materials of the anti-photoaging layer to obtain a first slurry; mix the components in the anti-fouling and hardening layer to obtain a second slurry. First, coat the first slurry on the surface of the substrate layer and cure it thermally to form the anti-photoaging layer. Then, coat the second slurry on the surface of the anti-photoaging layer and cure it by light to form the anti-fouling and hardening layer, obtaining a first composite.

[0167] Mix the components in the preparation raw materials of the first OCA layer to obtain a first adhesive; mix the components in the preparation raw materials of the second OCA layer to obtain a second adhesive. Coat the first adhesive and the second adhesive on the upper and lower surfaces of the polarizer respectively to obtain a second composite.

[0168] Bond the uncoated side of the first composite to the side of the polarizer coated with the first adhesive, and bond the thermal expansion balance layer to the side of the polarizer coated with the second adhesive. After curing and drying, the anti-aging polarization light-shielding device is obtained.

[0169] As an optional implementation manner, the preparation method of the first slurry includes: mixing the infrared absorber, ultraviolet absorber, surfactant, and composite solvent, and performing a first stirring to obtain a first dispersion; mixing the first dispersion and the polyhydroxy acrylic resin, performing a second stirring, and filtering to obtain a second dispersion; mixing the second dispersion and the isocyanate curing agent, and performing a third stirring to obtain the first slurry.

[0170] As an alternative embodiment, during the preparation of the first slurry, the rotation speed of the first stirring is 3000 - 10000 rpm, for example, it can be 3000 rpm, 4000 rpm, 5000 rpm, 6000 rpm, 7000 rpm, 8000 rpm, 9000 rpm, 10000 rpm, etc., and the time of the first stirring is 30 - 60 min, for example, it can be 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0171] As an alternative embodiment, during the preparation of the first slurry, the rotation speed of the second stirring is 3000 - 10000 rpm, for example, it can be 3000 rpm, 4000 rpm, 5000 rpm, 6000 rpm, 7000 rpm, 8000 rpm, 9000 rpm, 10000 rpm, etc., and the time of the second stirring is 30 - 60 min, for example, it can be 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0172] As an alternative embodiment, during the preparation of the first slurry, the rotation speed of the third stirring is 300 - 1000 rpm, for example, it can be 300 rpm, 400 rpm, 500 rpm, 600 rpm, 700 rpm, 800 rpm, 9000 rpm, 1000 rpm, etc., and the time of the third stirring is 20 - 40 min, for example, it can be 20 min, 25 min, 30 min, 35min, 40 min, etc.

[0173] As an alternative embodiment, the preparation method of the second slurry includes: mixing pentaerythritol triacrylate, isobornyl acrylate, polyurethane acrylate, tetraethylene glycol diacrylate, tetrahydrofurfuryl acrylate, N,N -dimethylacrylamide, performing the first stirring to obtain dispersion A; then adding a photoinitiator, an antifouling additive and an antioxidant, and performing the second stirring to obtain the second slurry.

[0174] As an alternative embodiment, during the preparation of the second slurry, the rotation speed of the first stirring is 300 - 1000 rpm, and the time of the first stirring is 30 - 60 min.

[0175] As an alternative embodiment, during the preparation of the second slurry, the rotation speed of the second stirring is 300 - 1000 rpm, and the time of the second stirring is 30 - 60 min.

[0176] As an alternative embodiment, during the process of preparing the anti-photoaging layer, the temperature of the thermal curing is 115 - 125 °C, such as 115 °C, 116 °C, 117 °C, 118 °C, 119 °C, 120 °C, 121 °C, 122 °C, 123 °C, 124 °C, 125 °C, etc., and the time of the thermal curing is 5 - 20 min, such as 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, 11 min, 12 min, 13 min, 14 min, 15 min, 16 min, 17 min, 18 min, 19 min, 20 min, etc.

[0177] As an alternative embodiment, during the process of preparing the anti-fouling and hardening layer, the UV energy of the photocuring is 300 - 500 mj / cm 2 , such as 300 mj / cm 2 , 350 mj / cm 2 , 400 mj / cm 2 , 450 mj / cm 2 , 500 mj / cm 2 , etc., and the time of the photocuring is 20 - 50 s, such as 20 s, 25 s, 30 s, 35 s, 40 s, 45 s, 50 s, etc.

[0178] As an alternative embodiment, the preparation method of the first adhesive includes: mixing a high-transparency acrylic resin, an epoxy resin, a water-blocking material, and an antioxidant, and stirring to obtain the first adhesive.

[0179] As an alternative embodiment, during the process of preparing the first adhesive, the rotation speed of the stirring is 300 - 1000 rpm, and the time of the stirring is 30 - 60 min.

[0180] As an alternative embodiment, the preparation method of the second adhesive includes: mixing a high-transparency acrylic resin, an epoxy resin, a water-blocking material, and an antioxidant, and stirring to obtain the second adhesive.

[0181] As an alternative embodiment, during the process of preparing the second adhesive, the rotation speed of the stirring is 300 - 1000 rpm, and the time of the stirring is 30 - 60 min.

[0182] As an alternative embodiment, after the lamination, the temperature of the curing and drying is 60 - 80 °C, such as 60 °C, 65 °C, 70 °C, 75 °C, 80 °C, etc.

[0183] As an optional implementation manner, the preparation method of the polarizer grating layer includes: adding 80% of the pigment into the polyvinyl alcohol, stirring for the first time, and then performing ultrasonic treatment; adding the remaining 80% of the pigment, stirring for the second time, and then casting into a film and stretching to obtain the polarizer grating layer.

[0184] As an optional implementation manner, during the preparation of the polarizer grating layer, the rotation speed of the first stirring is 500 - 1500 rpm, for example, it can be 500 rpm, 600 rpm, 700 rpm, 800 rpm, 900 rpm, 1000 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, etc.; the time of the first stirring is 10 - 60 min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0185] As an optional implementation manner, during the preparation of the polarizer grating layer, the power of the ultrasonic treatment is 10 - 30 kHZ, for example, it can be 10 kHZ, 12 kHZ, 14 kHZ, 15 kHZ, 16 kHZ, 18 kHZ, 20 kHZ, 22 kHZ, 24 kHZ, 25 kHZ, 26 kHZ, 28 kHZ, 30 kHZ, etc.; the time of the first stirring is 10 - 60 min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0186] As an optional implementation manner, during the preparation of the polarizer grating layer, the rotation speed of the second stirring is 200 - 800 rpm, for example, it can be 200 rpm, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm, 650 rpm, 700 rpm, 750 rpm, 800 rpm, etc.; the time of the first stirring is 10 - 60 min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0187] Third aspect, the present invention provides an application of the anti-aging polarized light shielding device as described in the first aspect in the preparation of a head-up display panel.

[0188] Fourth aspect, the present invention provides a head-up display panel, and the head-up display panel includes the anti-aging polarized light shielding device as described in the first aspect.

[0189] The present invention will be further described below through embodiments. Unless otherwise specified, the materials in the embodiments are prepared according to existing methods or directly purchased from the market.

[0190] Embodiment 1

[0191] This embodiment provides an anti-aging polarized light shielding device, which includes a stain-resistant and hardening layer, a light anti-aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer, and a thermal expansion balance layer stacked in sequence. The material ratios and thicknesses of each layer are shown in Table 1 below:

[0192] Table 1

[0193]

[0194] The preparation method includes the following steps:

[0195] Mix the components in the preparation raw materials of the light anti-aging layer to obtain Slurry 1; mix the components in the stain-resistant and hardening layer to obtain Slurry 2; first coat Slurry 1 on the surface of the substrate layer, and after thermal curing, form the light anti-aging layer, and then coat Slurry 2 on the surface of the light anti-aging layer, and after light curing, form the stain-resistant and hardening layer to obtain Composite 1;

[0196] Mix the components in the preparation raw materials of the first OCA layer to obtain Adhesive 1; mix the components in the preparation raw materials of the second OCA layer to obtain Adhesive 2; coat Adhesive 1 and Adhesive 2 on the upper and lower surfaces of the polarizer respectively to obtain Composite 2;

[0197] Bond the uncoated side of Composite 1 with the side of the polarizer coated with Adhesive 1, and bond the thermal expansion balance layer with the side of the polarizer coated with Adhesive 2, and after curing and drying, obtain the anti-aging polarized light shielding device.

[0198] Embodiment 2

[0199] This embodiment provides an anti-aging polarized light shielding device, which includes a stain-resistant and hardening layer, a light anti-aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer, and a thermal expansion balance layer stacked in sequence. The material ratios and thicknesses of each layer are shown in Table 2 below:

[0200] Table 2

[0201]

[0202] The preparation method includes the following steps:

[0203] Mix the components in the preparation raw materials of the anti-photoaging layer to obtain a first slurry; mix the components in the antifouling and hardening layer to obtain a second slurry; first apply the first slurry on the surface of the substrate layer, and after thermal curing, form the anti-photoaging layer, and then apply the second slurry on the surface of the anti-photoaging layer, and after photo-curing, form the antifouling and hardening layer to obtain a first composite;

[0204] Mix the components in the preparation raw materials of the first OCA layer to obtain a first adhesive; mix the components in the preparation raw materials of the second OCA layer to obtain a second adhesive; apply the first adhesive and the second adhesive on the upper and lower surfaces of the polarizer respectively to obtain a second composite;

[0205] Bond the uncoated side of the first composite with the side of the polarizer coated with the first adhesive, and bond the thermal expansion balance layer with the side of the polarizer coated with the second adhesive, and after curing and drying, obtain the anti-aging polarizing light-shielding device.

[0206] Example 3

[0207] This example provides an anti-aging polarizing light-shielding device, which includes an antifouling and hardening layer, an anti-photoaging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer, and a thermal expansion balance layer stacked in sequence. The material ratios and thicknesses of each layer are shown in Table 3 below:

[0208] Table 3

[0209]

[0210] The preparation method includes the following steps:

[0211] Mix the components in the preparation raw materials of the anti-photoaging layer to obtain a first slurry; mix the components in the antifouling and hardening layer to obtain a second slurry; first apply the first slurry on the surface of the substrate layer, and after thermal curing, form the anti-photoaging layer, and then apply the second slurry on the surface of the anti-photoaging layer, and after photo-curing, form the antifouling and hardening layer to obtain a first composite;

[0212] Mix the components in the preparation raw materials of the first OCA layer to obtain Adhesive 1; mix the components in the preparation raw materials of the second OCA layer to obtain Adhesive 2; apply Adhesive 1 and Adhesive 2 to the upper and lower surfaces of the polarizer respectively to obtain Composite 2;

[0213] Bond the uncoated side of Composite 1 with the side of the polarizer coated with Adhesive 1, and bond the thermal expansion balance layer with the side of the polarizer coated with Adhesive 2, and cure and dry to obtain the anti-aging polarization light-shielding device.

[0214] Example 4

[0215] This example provides an anti-aging polarization light-shielding device, which is only different from Example 1 in that the polyhydroxy acrylic resin in the preparation raw materials of the anti-photoaging layer is replaced with an equal weight of polyurethane acrylate, and other steps are the same as those in Example 1.

[0216] Example 5

[0217] This example provides an anti-aging polarization light-shielding device, which is only different from Example 1 in that the substrate layer is a PC layer with a thickness of 100 μm, and the thermal expansion balance layer is a PC layer with a thickness of 100 μm, and other steps are the same as those in Example 1.

[0218] Example 6

[0219] This example provides an anti-aging polarization light-shielding device, which is only different from Example 1 in that the substrate layer is a PC layer with a thickness of 125 μm, and the thermal expansion balance layer is a PC layer with a thickness of 125 μm, and other steps are the same as those in Example 1.

[0220] Example 7

[0221] This example provides an anti-aging polarization light-shielding device, which is only different from Example 1 in that the thickness of the substrate layer is 125 μm, and the thickness of the thermal expansion balance layer is 100 μm, and other steps are the same as those in Example 1.

[0222] Example 8

[0223] This example provides an anti-aging polarization light-shielding device, which is only different from Example 1 in that the epoxy resin in the preparation raw materials of the first OCA layer and the second OCA layer is replaced with an equal weight of phenolic resin, and other steps are the same as those in Example 1.

[0224] Comparative Example 1

[0225] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that the antifouling and hardening layer comprises, by weight: 50 parts of hydroxyl-containing polyurethane acrylate, 40 parts of dipentaerythritol hexaacrylate, 5 parts of pentaerythritol triacrylate, 3 parts of 2-isopropylthioxanthone, 2 parts of pentaerythritol ester of β tetrakis-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 5 parts of perfluoropolyether, and other steps are the same as those in Example 1.

[0226] Comparative Example 2

[0227] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that pentaerythritol triacrylate is not added, the content of isobornyl acrylate is increased to 25 parts, and the content of polyurethane acrylate is increased to 35 parts, and other steps are the same as those in Example 1.

[0228] Comparative Example 3

[0229] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that isobornyl acrylate is not added, the content of pentaerythritol triacrylate is increased to 20 parts, and the content of polyurethane acrylate is increased to 40 parts, and other steps are the same as those in Example 1.

[0230] Comparative Example 4

[0231] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that polyurethane acrylate is not added, the content of pentaerythritol triacrylate is increased to 20 parts, isobornyl acrylate is increased to 30 parts, tetraethylene glycol diacrylate is increased to 10 parts, and tetrahydrofurfuryl acrylate is increased to 20 parts, and other steps are the same as those in Example 1.

[0232] Comparative Example 5

[0233] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that tetrahydrofurfuryl acrylate is not added and replaced with an equal mass of methyl methacrylate, and other steps are the same as those in Example 1.

[0234] Comparative Example 6

[0235] This comparative example provides an anti-aging polarized light-shielding device, which is only different from Example 1 in that N,N -dimethylacrylamide is replaced with an equal mass of 4-tert-butylcyclohexyl acrylate, and other steps are the same as those in Example 1.

[0236] Test Example 1

[0237] Tests related to the hardening layer

[0238] Test samples: Anti-aging polarized light-shielding devices provided in Examples 1 to 8, and anti-aging polarized light-shielding devices provided in Comparative Examples 1 to 6.

[0239] Test methods:

[0240] (1) Adhesion: Scratch 100 squares of 1×1 mm on the surface of the anti-fouling hardening layer; Stick a transparent tape with the model number 610-1PK produced by 3M Company of the United States flatly on the squares without leaving any gaps, and then lift it up at a speed of 60° as fast as possible, and observe whether there is delamination at the edge of the scratch; If there is no delamination, it is 5B, the delamination amount is between ≤5% is 4B, between 5-15% is 3B, between 15-35% is 2B, between 35-65% is 1B, and 65% and above is 0B.

[0241] (2) Hardness: According to the ASTM D3363 standard, the test method is to use a series of pencils with hardness ranging from soft to hard (such as 6B to 9H), scratch the coating surface at a fixed angle and with uniform force, and gradually test until the highest hardness pencil that does not scratch the coating is found.

[0242] (3) Flexibility: Bend the film closely against a 5 mm diameter mandrel and recover 10 times; "OK" means no cracks; "NG" means there are cracks.

[0243] (4) Scratch resistance: Resist scratching with a Japanese Rhino brand 0000# steel wool, 500 g force, and 40 round trips per minute; "OK" means no obvious scratches; "NG" means there are obvious scratches.

[0244] The specific test results of the anti-fouling hardening layer are shown in Table 4 below:

[0245] Table 4

[0246]

[0247] As shown in Table 4, the adhesion of the anti-fouling hardening layer of the anti-aging polarized light-shielding devices provided in Examples 1 to 8 is above 5B, the hardness can be adjusted between H and B according to the device requirements, the optimal solution is HB, and the flexibility and scratch resistance of this layer are excellent. This shows that the anti-fouling hardening layer described in the present invention contains a composite acrylic resin with a specific composition and ratio and adds a fluoropolymer as an anti-fouling and anti-fingerprint additive. Through the mutual cooperation of various acrylates, the compatibility is good, and a hardening coating with excellent formability can be formed, and its scratch resistance, wear resistance, chemical resistance, weather resistance, and anti-fouling property are significantly improved.

[0248] Test Example 2

[0249] Tests related to anti-aging polarized light-shielding devices

[0250] Test samples: The anti-aging polarized light-shielding devices provided in Examples 1 to 8.

[0251] Test methods:

[0252] (1) Transmittance: Use a BYK transmission haze meter from Germany to measure the transmittance of the film.

[0253] (2) Thickness: Take 10 different positions and measure the thickness at each position using a micrometer, and then take the average value.

[0254] (3) Thickness uniformity: Take 5 samples of 3 cm × 3 cm squares in the film width direction, measure the thickness of the four sides with a micrometer respectively to obtain 20 thickness data, then find the maximum difference from the average thickness, and divide this difference by the average thickness.

[0255] (4) Resistance to light aging: The number of days of tolerance is tested by a QLAB UV aging tester.

[0256] (5) Resistance to high temperature and high humidity: Place it in a high temperature and high humidity experiment at 85°C and 85% humidity to test the tolerance time.

[0257] The specific test results are shown in Table 5 below:

[0258] Table 5

[0259]

[0260] As shown in Table 5, the hardening layer of the anti-aging polarized light-shielding device has excellent ability to prevent external physical damage and chemical solvent damage; the anti-light aging layer has excellent ability to prevent organic matter aging. For cars that require a long service life under direct sunlight, it can prevent the destruction of the polymer materials in each layer by ultraviolet rays, reduce problems such as yellowing, fogging, and powdering of the polymer materials under ultraviolet rays, and prevent the hardening effect of ultraviolet rays on the two layers of OCA, resulting in problems such as a decrease in adhesion and film peeling during use; the optical film substrate can effectively improve the overall flame retardant effect and prevent water vapor from invading and damaging the polarizer material; the first OCA layer connects the substrate layer and the polarizer, the second OCA layer connects the polarizer and the thermal expansion balance layer, and provides a certain degree of flexibility. OCA can also block the erosion of water vapor on the polarizer; the polarizer can provide a non-uniform grating polarizer, which can improve the color reducibility when there is a polarization angle error; the thermal expansion balance layer is applied when the product is curved in a head-up display to ensure good curvature fitting.

[0261] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-aging polarized light-shielding device, characterized in that, The anti-aging polarized light-shielding device includes a stain-resistant and hardening layer, a light anti-aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer, and a thermal expansion balance layer that are stacked in sequence; The antifouling and hardening layer is composed of a composite acrylic resin and an antifouling additive with a mass ratio of 100:(0.1~10); wherein, the raw materials for preparing the composite acrylic resin are composed of the following components in parts by weight: 5~15 parts of pentaerythritol triacrylate, 15~25 parts of isobornyl acrylate, 25~35 parts of polyurethane acrylate, 1~10 parts of tetraethylene glycol diacrylate, 10~20 parts of tetrahydrofurfuryl acrylate, N,N -dimethylacrylamide 10~20, 0.5~3 parts of a photoinitiator and 0.5~3 parts of an antioxidant; the antifouling additive is a fluorine-containing polymer; The preparation raw materials of the first OCA layer and the second OCA layer are both calculated by weight and include: 100 parts of high-transparency acrylic resin, 0.5 - 2 parts of epoxy resin, 0.5 - 2 parts of water-blocking material, and 0.1 - 1 part of antioxidant; the light transmittance of the high-transparency acrylic resin is 85 - 93%; the water-blocking material is selected from nano-inorganic particles; wherein, the nano-inorganic particles include any one or a combination of at least two of nano-zinc oxide, nano-silica, nano-zirconia, or cellulose nanocrystals; the antioxidant is selected from any one or a combination of at least two of methyl silicone, hexapropyl phosphite triamide, or dialkyl phosphite.

2. The anti-aging polarized light-shielding device according to claim 1, wherein The photoinitiator is selected from any one or a combination of at least two of benzophenone, 2-isopropyl thioxanthone, dimethylbenzoyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-acetone, 2-hydroxy-2-methyl-1-phenyl-1-acetone, or 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl) butanone; and / or, the antioxidant is selected from any one or a combination of at least two of pentaerythritol tetrakis β -(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], dilauryl thiodipropionate, pentaerythritol distearyl diphosphite, tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite or lauryl thiodipropionate; and / or, the anti-fouling additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosiloxane, bis(trimethoxysilylpropyl carbamate) perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane, or perfluorooctyltrimethoxysilane; and / or, the thickness of the stain-resistant and hardening layer is 1 - 15 μm.

3. The anti-aging polarized light-shielding device according to claim 1, wherein The preparation raw materials of the light anti-aging layer are calculated by weight and include: 10 - 20 parts of polyhydroxy acrylic resin, 1 - 10 parts of isocyanate curing agent, 0 - 20 parts of infrared absorber, 1 - 10 parts of ultraviolet absorber, 0.1 - 5 parts of surfactant, and 60 - 80 parts of composite solvent; And / or, the composite solvent comprises a solvent with a large molecular weight and a solvent with a small molecular weight in a mass ratio of (8.5~9.8):(0.2~1.5); wherein, the solvent with a large molecular weight comprises N any one or a combination of at least two of N-methyl-2-pyrrolidone, cyclohexanone or xylene, and the solvent with a small molecular weight comprises any one or a combination of at least two of isopropanol, methyl ethyl ketone or ethyl acetate; and / or, the surfactant is selected from any one or a combination of at least two of alkyl sulfates with C12 or above, straight-chain alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkyl phenols, straight-chain alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes, or polyureas; and / or, the hydroxyl value of the polyhydroxy acrylic resin is 10 - 150 mgKOH / g; and / or, the polyhydroxy acrylic resin is selected from any one or a combination of at least two of HU840K from Laiyang Hong'an, HA865 from Kunshan Kast, LR7601 from Mitsubishi, or DS-2055 resin from Nantong Baisen Chemical Industry; and / or, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate; and / or, the isocyanate curing agent is selected from any one or a combination of at least two of N3300 of the HDI type from BASF, XP 2400 of the IPDI type from BASF, HDI 200 from Wanhua, IPDI 200 from Wanhua, L75 of the HDI type from Covestro, or I100 of the IPDI type from Covestro; And / or, the infrared absorber comprises an organic dye and a metal oxide in a mass ratio of (0.05~2):(8~10); wherein, the organic dye is selected from indole-based near-infrared fluorescent organic dyes, and the metal oxide is selected from nano rare earth metal oxide powders; And / or, the organic dye is selected from any one or a combination of at least two of IR780, IR820, IR956, IR1008 or IR1086; And / or, the particle size of the nano rare earth metal oxide powder is 20 to 50 nm, and the specific surface area of the nano rare earth metal oxide powder is 30 to 60 m 2 / g; And / or, the metal oxide is selected from any one or a combination of at least two of tungsten oxide, tungsten cesium oxide, tungsten gold vanadium oxide, tungsten vanadium tin antimony oxide, cesium tungsten bronze; And / or, the ultraviolet absorber is selected from any one or a combination of at least two of benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers or phenylbenzimidazole ultraviolet absorbers; And / or, the benzotriazole ultraviolet absorber is selected from any one or a combination of at least two of UV326, UV327, UV329 or UVP; And / or, the triazine ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 400, Tinuvin 405 or UV-1577; And / or, the phenylbenzimidazole ultraviolet absorber is selected from any one or a combination of at least two of Tinuvin 328, Tinuvin360 or UV-1226; And / or, the thickness of the anti-photoaging layer is 5~30 μm.

4. The anti-aging polarized light-shielding device according to claim 1, wherein The substrate layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is >85%; And / or, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP or PMMA; And / or, the thickness of the substrate layer is 75~200 μm.

5. The anti-aging polarized light-shielding device according to claim 1, wherein The thickness ratio of the first OCA layer to the second OCA layer is 1:(1~1.25); And / or, the thickness of the first OCA layer is 10~100 μm, and the thickness of the second OCA layer is 10~125 μm.

6. The anti-aging polarized light-shielding device according to claim 1, characterized in that The polarizer comprises a polarizer grating layer and protective film layers on the upper and lower surfaces of the polarizer grating layer; wherein, the polarizer grating layer comprises polyvinyl alcohol and a high-temperature resistant dichroic pigment in a mass ratio of 100:(1~10); the protective film layer comprises cellulose triacetate; And / or, the high-temperature resistant dichroic pigment comprises any one or a combination of at least two of bisazo dichroic dyes, anthraquinone dichroic dyes, triazine and derivative dichroic dyes, monomethine dichroic dyes or polymethine dichroic dyes; And / or, the thickness of the polarizer is 100~200 μm; And / or, the thickness of the polarizer grating layer is 20~100 μm, and the thicknesses of the protective film layers on the upper and lower surfaces of the polarizer grating layer are each independently 20~50 μm.

7. The anti-aging polarization light-shielding device according to claim 1, wherein The thermal expansion balance layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is >85%; And / or, the optically highly transparent material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP or PMMA.

8. A method for preparing an anti-aging polarized light-shielding device according to any one of claims 1 to 7, characterized in that, The preparation method includes the following steps: Mix the components in the preparation raw materials of the anti-photoaging layer to obtain a first slurry; mix the components in the anti-fouling and hardening layer to obtain a second slurry; first apply the first slurry on the surface of the substrate layer, and after thermal curing, form the anti-photoaging layer, and then apply the second slurry on the surface of the anti-photoaging layer, and after photo-curing, form the anti-fouling and hardening layer to obtain a first composite; Mix the components in the preparation raw materials of the first OCA layer to obtain a first adhesive; mix the components in the preparation raw materials of the second OCA layer to obtain a second adhesive; respectively apply the first adhesive and the second adhesive on the upper and lower surfaces of the polarizer to obtain a second composite; Bond the uncoated side of the first composite to the side of the polarizer coated with the first adhesive, bond the thermal expansion balance layer to the side of the polarizer coated with the second adhesive, and after curing and drying, obtain the anti-aging polarized light shielding device.

9. Use of the anti-aging polarized light shielding device according to any one of claims 1 to 7 in the preparation of a head-up display panel.

10. A head-up display panel, characterized in that, The head-up display panel includes the anti-aging polarized light shielding device according to any one of claims 1 to 7.

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