Anti-glare wide viewing angle hard coating film, preparation method and application thereof

Abstract

This invention provides an anti-glare wide-viewing-angle curing film, comprising a substrate and an anti-glare wide-viewing-angle curing layer stacked sequentially. By weight, the slurry of the anti-glare wide-viewing-angle curing layer comprises 5-15 parts of high-functionality acrylate, 5-15 parts of high-molecular-weight acrylic polymer, 0.5-5 parts of fibrous particles, 0.005-0.05 parts of curing agent, 0.1-5 parts of photoinitiator, and 15-80 parts of solvent. The high-molecular-weight acrylic polymer has a weight-average molecular weight of 800,000-1,600,000 and a glass transition temperature of 0-20°C. The high-functionality acrylate has a functionality >2. The anti-glare wide-viewing-angle curing film exhibits excellent wide-viewing-angle effect and anti-glare properties, high total light transmittance, high hardness, good wear resistance, and combines the characteristics of polarizer surface coating and wide-viewing-angle properties.

Description

Technical Field

[0001] This invention belongs to the field of optical functional thin film technology, specifically relating to an anti-glare wide-viewing-angle hardened film, its preparation method, and its application. Background Technology

[0002] With the development of the social economy and the improvement of people's consumption level, the market share of large-screen TVs has gradually increased. LCDVA (Liquid Crystal VA) screens have become the mainstream choice due to their cost advantages, high contrast ratio (above 3000:1), excellent black level performance, and long lifespan. However, traditional VA screens have viewing angle deviation problems. When the viewing angle exceeds 60°, there is a significant color shift and contrast reduction. Therefore, how to improve the viewing angle of VA screens is an important research topic in the industry both domestically and internationally.

[0003] The display panel industry has introduced two wide-viewing-angle technologies: multi-domain vertical alignment and patterned vertical alignment. VA panels can be divided into two types: MVA (multi-domain vertical alignment) and PVA (patterned vertical alignment). These two technologies improve the viewing angle uniformity of color and brightness by creating microdomains with different pretilt angles within pixels and utilizing a symmetry compensation mechanism, significantly improving the subjective viewing experience.

[0004] However, improvements to the panel structure are only one part of solving the viewing angle problem. The full realization of the wide viewing angle performance of an LCD VA panel strongly depends on the matching wide viewing angle performance of the upper polarizer. Therefore, this requires the upper polarizer to also possess excellent wide viewing angle characteristics.

[0005] To simultaneously achieve both surface coating and wide viewing angle properties, existing top polarizer surface coating products typically include an anti-glare curing layer, a substrate layer, and a pressure-sensitive adhesive layer with wide viewing angle functionality. The anti-glare curing layer is a traditional functional layer used in top polarizer surface coatings, providing basic properties such as anti-glare and pencil hardness, but it does not improve viewing angle. Existing solutions add a wide-viewing-angle pressure-sensitive adhesive layer below the substrate layer. This functional layer consists of pressure-sensitive adhesive as the main component, encapsulated with special particles, and then cured to achieve the wide viewing angle function. However, the pressure-sensitive adhesive has low crosslinking density and low modulus, resulting in poor hardness. Compared to the traditional surface coating structure of "anti-glare curing layer + substrate layer," the pencil hardness is significantly reduced; it also increases usage costs and adds production steps.

[0006] Therefore, developing an optical thin film that combines high hardness and high wear resistance with anti-glare and wide viewing angle functions is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide an anti-glare wide-viewing-angle hardened film, its preparation method, and its application. The anti-glare wide-viewing-angle hardened film possesses excellent wide-viewing-angle effect and anti-glare properties, high total light transmittance, high hardness, good wear resistance, and combines the characteristics of polarizer surface coating and wide-viewing-angle properties.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides an anti-glare wide-viewing-angle curing film, the anti-glare wide-viewing-angle curing film comprising a substrate and an anti-glare wide-viewing-angle curing layer stacked sequentially; by weight, the slurry of the anti-glare wide-viewing-angle curing layer comprises 5-15 parts of high-functionality acrylate, 5-15 parts of high molecular weight acrylic polymer, 0.5-5 parts of fibrous particles, 0.005-0.05 parts of curing agent, 0.1-5 parts of photoinitiator, and 15-80 parts of solvent; the high molecular weight acrylic polymer has a weight-average molecular weight (Mw) of 800,000-1,600,000 and a glass transition temperature (Tg) of 0-20°C; the high-functionality acrylate has a functionality >2.

[0010] In this invention, a high-functionality acrylate and a high-molecular-weight acrylic polymer are compounded to effectively disperse fibrous particles. A wet coating process ensures that the fibrous particles are arranged regularly within the hardened film, resulting in a hardened film with excellent wide-viewing angle, anti-glare properties, and high light transmittance. Simultaneously, the compounding of acrylates with specific functionalities and acrylic polymers with specific Tg and Mw values ​​gives the anti-glare wide-viewing angle hardened film high hardness and excellent wear resistance. A single-layer structure achieves the effects of both a traditional polarizer surface coating and a wide-viewing angle functional layer, significantly reducing usage costs, simplifying product structure, and shortening the production process.

[0011] In this invention, the high-functionality acrylate is 5 to 15 parts, for example, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, etc.

[0012] In this invention, if the content of the high-functionality acrylate is too low, the overall pencil hardness and abrasion resistance will decrease after the slurry is coated and cured; if it is too high, the dispersion of fiber particles in the slurry will deteriorate and the wide-viewing angle effect will be poor after the subsequent film is formed and cured.

[0013] In this invention, the high molecular weight acrylic polymer is 5 to 15 parts, for example, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, etc.

[0014] In this invention, if the content of the high molecular weight acrylic polymer is too low, the dispersion of fiber particles in the slurry will deteriorate, resulting in poor wide-viewing angle effect after subsequent film formation and curing; if it is too high, the pencil hardness and abrasion resistance will decrease after the slurry is coated and cured.

[0015] In this invention, the fibrous particles are 0.5 to 5 parts, for example, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, 4 parts, 4.2 parts, 4.4 parts, 4.6 parts, 4.8 parts, etc.

[0016] In this invention, compared with other non-fibrous particles (such as spherical particles), fibrous particles are used. When added in sufficient quantities and dispersed sufficiently, they can simultaneously satisfy the functions of high haze anti-glare and wide viewing angle after being coated into a film.

[0017] In this invention, the curing agent is used in quantities of 0.005 to 0.05 parts, for example, 0.006 parts, 0.008 parts, 0.01 parts, 0.015 parts, 0.02 parts, 0.025 parts, 0.03 parts, 0.035 parts, 0.04 parts, 0.045 parts, etc.

[0018] In this invention, the photoinitiator is 0.1 to 5 parts, for example, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, etc.

[0019] In this invention, the solvent is 15 to 80 parts, for example, it can be 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, etc.

[0020] In this invention, the high-functionality acrylate has a functionality >2, for example, it can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, etc., and more preferably 6 to 12.

[0021] In this invention, if the functionality of the high-functionality acrylate is too low, the crosslinking density after the slurry is coated and cured will be low, resulting in a decrease in pencil hardness and abrasion resistance; if it is too high, the shrinkage stress after the slurry is coated and cured will be large, resulting in poor wide-viewing angle effect after film formation.

[0022] In this invention, the high-functionality acrylate includes any one or a combination of at least two of polyurethane acrylate, polyether acrylate, polyester acrylate, epoxy acrylate, and acrylic resin, preferably polyurethane acrylate.

[0023] In this invention, the weight-average molecular weight of the high molecular weight acrylic polymer is 800,000 to 1,600,000, for example, it can be 850,000, 900,000, 950,000, 1,000,000, 1,050,000, 1,100,000, 1,150,000, 1,200,000, 1,250,000, 1,300,000, 1,350,000, 1,400,000, 1,450,000, 1,500,000, 1,550,000, etc.

[0024] In this invention, the glass transition temperature of the high molecular weight acrylic polymer is 0~20℃, for example, it can be 2℃, 4℃, 6℃, 8℃, 10℃, 12℃, 14℃, 16℃, 18℃, 19℃, etc.

[0025] In this invention, if the Mw and Tg of the high molecular weight acrylic polymer are too small, the cohesive force after the slurry is coated and cured will be insufficient, resulting in a decrease in pencil hardness and abrasion resistance; if they are too large, the dissolution and dispersion process of the high molecular weight acrylic polymer will be difficult and the compatibility with low molecular weight acrylate will be poor, resulting in a decrease in optical transmittance and insufficient wide viewing angle effect.

[0026] In this invention, the high molecular weight acrylic polymer can be purchased or prepared using conventional methods in the art. When prepared, there are no excessive limitations on the type and content of the polymer monomers, the type and content of the initiator, etc., of the high molecular weight acrylic polymer. Conventional polymer monomers and initiators in the art can be used, as long as a high molecular weight acrylic polymer with Mw and Tg within the above range can be prepared.

[0027] In this invention, the aspect ratio of the fibrous particles is (5~20):1; wherein, the specific values ​​of (5~20) can be, for example, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, etc.

[0028] In this invention, the aspect ratio of the fibrous particles is less than 5:1, resulting in insufficient wide viewing angle effect; and greater than 20:1, the fibrous particles are not easily dispersed in the slurry, resulting in insufficient wide viewing angle effect.

[0029] In this invention, the fibrous particles include any one or a combination of at least two of the following: calcium carbonate fibrous particles, barium sulfate fibrous particles, alumina fibrous particles, barium titanate fibrous particles, silicon dioxide fibrous particles, and titanium dioxide fibrous particles.

[0030] In this invention, the curing agent includes any one or a combination of at least two of isocyanate curing agents and epoxy curing agents.

[0031] In this invention, the photoinitiator includes any one or a combination of at least two of α-hydroxyalkylphenyl ketone, acylphosphine oxide, and α-aminoalkylphenyl ketone.

[0032] In this invention, the solvent includes organic solvents; the organic solvent includes at least one of ester solvents, ketone solvents, alcohol solvents, and ether solvents, preferably ester solvents, such as ethyl acetate, n-butyl acetate, etc.

[0033] In this invention, the thickness of the anti-glare wide-viewing-angle hardened layer is 10~25μm, for example, it can be 12μm, 14μm, 16μm, 18μm, 20μm, 22μm, 24μm, etc.

[0034] In this invention, the thickness of the substrate is 20~200μm, for example, it can be 40μm, 60μm, 80μm, 100μm, 120μm, 140μm, 160μm, 180μm, etc.

[0035] In this invention, the substrate may be a polarizer surface-coated optical film substrate, and exemplary, it includes, but is not limited to, at least one of polyethylene terephthalate (PET) substrate, polymethyl methacrylate (PMMA) substrate, and cellulose triacetate (TAC) substrate.

[0036] In a second aspect, the present invention provides a method for preparing an anti-glare wide-viewing-angle curing film according to the first aspect, the method comprising the following steps: (1) providing a slurry for an anti-glare wide-viewing-angle curing layer; (2) coating the slurry onto a surface of a substrate and curing it to obtain the anti-glare wide-viewing-angle curing film.

[0037] In this invention, the preparation method of the anti-glare wide-view curing layer slurry includes the following steps: (S1) mixing high-functionality acrylate, high molecular weight acrylic polymer and solvent at a formulation amount of 20-30% (e.g., 22%, 24%, 26%, 28%, etc.) to obtain solution A; (S2) mixing fibrous particles with solvent to obtain solution B; the mass ratio of the fibrous particles to the solvent is 1:(2-3), for example, 1:2.2, 1:2.4, 1:2.6, 1:2.8, etc.; (S3) mixing solution B with solution A to obtain solution C; (S4) mixing solution C with curing agent, photoinitiator and remaining solvent to obtain the slurry.

[0038] In this invention, the mixing speed in step (S1) is 200~600 rpm, for example, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, etc.; the time is 40~90 min, for example, 45 min, 50 min, 55 min, 60 min, 65 min, 70 min, 75 min, 80 min, 85 min, etc.

[0039] In this invention, the mixing speed in step (S2) is 50~150 rpm, for example, it can be 60 rpm, 70 rpm, 80 rpm, 90 rpm, 100 rpm, 110 rpm, 120 rpm, 130 rpm, 140 rpm, etc.; the time is 15~45 min, for example, it can be 20 min, 25 min, 30 min, 35 min, 40 min, etc.

[0040] In this invention, step (S3) includes adding solution B to solution A for mixing. The mixing speed is 200~600 rpm, for example, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, etc.; the mixing time is 40~80 min, for example, 45 min, 50 min, 55 min, 60 min, 65 min, 70 min, 75 min, etc.

[0041] In this invention, the mixing speed in step (S4) is 200~600 rpm, for example, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, etc.; the time is 20~60 min, for example, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, etc.

[0042] In this invention, the curing agent and photoinitiator in step (S4) can be partially diluted with solvent before being added for easy weighing.

[0043] In this invention, the slurry of the anti-glare wide-viewing-angle hardening layer should meet the requirements of the scraper fineness test: 0-5 particle points under a thickness of 15-20μm, and 0-10 particle points under a thickness of 10-15μm.

[0044] In this invention, the coating method includes a wet coating process; the slurry is uniformly applied to a thin film substrate. The wet coating process must be able to apply a shear force of 10-20 Pa to the liquid surface; the specific coating method can be blade coating, with a blade gap of 24-50 μm after deducting the substrate thickness, a coating speed of 15-25 m / min, and a pressure of 0.1-0.2 MPa; it can be slot extrusion coating, with a slot gap of 30-75 μm, a coating speed of 15-30 m / min, and a pressure of 0.2-0.3 MPa; or it can be flow coating, with a flow channel height of 10-15 mm, a coating speed of 18-22 m / min, and a temperature of 25-30℃.

[0045] In this invention, the step of drying is included before curing; the drying temperature is 40~80℃, for example, it can be 45℃, 50℃, 55℃, 60℃, 65℃, 70℃, 75℃, etc.; the drying time is 2~5min, for example, it can be 2.5min, 3min, 3.5min, 4min, 4.5min, etc.

[0046] In this invention, the curing includes thermal curing and / or ultraviolet curing.

[0047] In this invention, the temperature for heat curing is 80~110℃, for example, it can be 85℃, 90℃, 95℃, 100℃, 105℃, etc.; the time is 3~10min, for example, it can be 4min, 5min, 6min, 7min, 8min, 9min, etc.

[0048] In this invention, the ultraviolet curing includes a first-stage curing and a second-stage curing performed sequentially; the illuminance of the first-stage curing is 50~200mW / cm². 2 For example, it can be 60 mW / cm 2 80 mW / cm 2 100 mW / cm 2 120mW / cm 2 140 mW / cm 2 160 mW / cm 2 180 mW / cm 2 etc.; energy is 100~300mJ / cm 2 For example, it can be 120 mJ / cm 2 150 mJ / cm 2 180 mJ / cm 2 200 mJ / cm 2 220 mJ / cm 2 250 mJ / cm 2280 mJ / cm 2 etc.; the illuminance for the second stage of curing is 700~1000mW / cm². 2 For example, it can be 750 mW / cm 2 800 mW / cm 2 850 mW / cm 2 900mW / cm 2 950 mW / cm 2 etc.; energy is 300~800 mJ / cm 2 For example, it can be 350 mJ / cm 2 400 mJ / cm 2 450 mJ / cm 2 500 mJ / cm 2 550 mJ / cm 2 600 mJ / cm 2 650 mJ / cm 2 700 mJ / cm 2 750 mJ / cm 2 wait.

[0049] Thirdly, the present invention provides a polarizer, the polarizer comprising the anti-glare wide-viewing-angle hardened film described in the first aspect.

[0050] Fourthly, the present invention provides a display panel, the display panel including the polarizer described in the third aspect.

[0051] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0052] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0053] The anti-glare wide-viewing-angle curing film provided by this invention is made by compounding acrylates with specific functionalities and acrylic polymers with specific Tg and Mw with fibrous particles in specific amounts. This makes the anti-glare wide-viewing-angle curing film have excellent wide-viewing-angle effect and anti-glare properties, high light transmittance, high hardness, and good wear resistance. It can achieve the effect of two layers, the surface coating of traditional polarizer and wide-viewing-angle functional layer, through a single-layer structure, which can significantly reduce the cost of use, simplify the product structure, and shorten the production process. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the anti-glare wide-viewing-angle hardening film provided by the present invention.

[0055] Among them, 1-substrate; 2-anti-glare wide-viewing-angle hardened layer. Detailed Implementation

[0056] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0057] All materials used in this invention can be purchased commercially or prepared using conventional methods. Unless otherwise specified, the materials used in this invention are shown in Table 1.

[0058] Table 1

[0059]

[0060] The preparation method of the high molecular weight acrylic polymer includes: adding 40-55 parts of isobornyl acrylate (IBOA), 10 parts of acrylate (AA), 25-45 parts of butyl acrylate (BA), 10 parts of 2-hydroxyethyl acrylate (HEA), and 100 parts of ethyl acetate to a glass reactor under a nitrogen atmosphere; adding 0.02-0.15 parts of initiator (AIBN); maintaining the temperature at 70°C for 5 hours; then adding 0.05-0.3 parts of AIBN; and maintaining the temperature at 80°C for 3 hours to obtain the high molecular weight acrylic polymer; wherein, high molecular weight acrylic polymers with different Mw and Tg are obtained by adjusting the contents of IBOA, BA, and initiator.

[0061] Examples 1-9, Comparative Examples 1-6

[0062] Examples 1-9 and Comparative Examples 1-6 each provide an anti-glare wide-viewing-angle curing film, and the structural schematic diagram of the anti-glare wide-viewing-angle curing film is shown below. Figure 1 As shown, it includes a substrate 1 and an anti-glare wide-viewing-angle curing layer 2 stacked sequentially; the types of the substrate and the thickness of the anti-glare wide-viewing-angle curing layer are shown in Tables 2 and 3; the formulation of the slurry of the anti-glare wide-viewing-angle curing layer by weight is shown in Tables 2 and 3.

[0063] Unless otherwise specified, the preparation method of the anti-glare wide-viewing-angle curing film of the present invention includes the following steps:

[0064] (1) Provide a slurry for an anti-glare, wide-viewing-angle hardening layer;

[0065] (S1) According to the formula, the high-functionality acrylate, high molecular weight acrylic polymer and part of the solvent (accounting for 25% of the total mass of the solvent) are mixed and mechanically stirred at 350 rpm for 60 rpm to obtain liquid A;

[0066] (S2) The fibrous particles were pre-dispersed in a partial solvent at a weight ratio of 1:2.2, and the dispersion conditions were mechanical stirring at 80 rpm for 20 min to obtain solution B.

[0067] (S3) Add the evenly dispersed liquid B to the evenly mixed liquid A, and mechanically stir at 520 rpm for 75 min to obtain liquid C;

[0068] (S4) Mix liquid C with curing agent, photoinitiator and remaining solvent, and mechanically stir at 350 rpm for 40 min to obtain the slurry;

[0069] (2) The slurry is applied evenly to the substrate using a wet coating process, then baked at 80°C for 2 minutes to dry and evaporate the solvent, followed by baking at 100°C for 5 minutes for thermosetting, and finally UV curing. The UV curing conditions are: first, at an illuminance of 150 mW / cm². 2 The energy is 200 mJ / cm 2 After irradiation under certain conditions, the illuminance is then increased to 750 mW / cm². 2 The energy is 600 mJ / cm 2 The anti-glare wide-viewing-angle hardened film was obtained by irradiation.

[0070] Performance testing

[0071] (1) Total light transmittance: Tested according to JIS K 7105 using an NDH 2000N haze meter from Nippon Denshoku Co., Ltd.

[0072] (2) Haze: Tested according to JIS K 7105 using an NDH 2000N haze meter from Nippon Denshoku Co., Ltd.

[0073] (3) Wide viewing angle: The sample to be tested is placed parallel to the LED tube, and the line of sight is perpendicular to the sample surface to observe the diffusion and focusing of the light passing through the sample. When the sample coating direction is parallel to the LED tube, and the light passes through the sample and diffuses perpendicular to the LED tube, a wide viewing angle effect is achieved. The best wide viewing angle effect is when the visually observed diffusion width covers the entire sample. Conversely, when the sample coating direction is perpendicular to the LED tube, and the light passes through the sample and focuses parallel to the LED tube, a wide viewing angle effect is achieved. The best wide viewing angle effect is when the visually observed focusing width is the same as the width of the LED tube. The wide viewing angle effect is denoted as " If neither diffusion nor clustering is satisfied, the wide-angle effect is denoted as "". If neither condition is met, the wide-angle effect is denoted as "". "

[0074] (4) Pencil hardness: Mitsubishi UNI test pencil, tip load 500g, pencil and test surface angle 45°, push the pencil to make 5 strokes, observe the scratches on the surface, and record the pencil hardness corresponding to 5 strokes without scratches.

[0075] (5) Abrasion resistance: Rub the sample surface under pressure of 500g of 20mm×20mm Bon Star #0000 steel wool for 10 rounds and observe the scratches on the surface.

[0076] The specific test results are shown in Tables 2 and 3; among them, " "This indicates that the corresponding effect / function is not present or that the ingredient is not in the formula;" "Indicates that there is a corresponding effect / function;" "Indicates poor performance / function" "Indicates that the corresponding effect / function is good."

[0077] Table 2

[0078]

[0079] Table 3

[0080]

[0081] As shown in Tables 2 and 3, the anti-glare wide-viewing-angle curing film provided by this invention is compounded with acrylates of specific functionality and acrylic polymers of specific Tg and Mw with fibrous particles in specific amounts. This results in the anti-glare wide-viewing-angle curing film having excellent wide-viewing-angle effect and anti-glare properties, high total light transmittance, high hardness, and good wear resistance. It achieves the effect of a traditional polarizer surface coating and a wide-viewing-angle functional layer through a single-layer structure, which can significantly reduce usage costs, simplify product structure, and shorten the production process. The anti-glare wide-viewing-angle curing film has a total light transmittance of ≥93%, a haze of 40~60%, good anti-glare and wide-viewing-angle effects, and a hardness of 2H or higher. After 10 rounds of rubbing with 500g steel wool, the surface of the curing layer is free of scratches.

[0082] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. An anti-glare wide-viewing-angle curing film, characterized in that, The anti-glare wide-viewing-angle curing film comprises a substrate and an anti-glare wide-viewing-angle curing layer stacked sequentially. By weight, the slurry of the anti-glare wide-viewing-angle curing layer comprises 5-15 parts of high-functionality acrylate, 5-15 parts of high molecular weight acrylic polymer, 0.5-5 parts of fibrous particles, 0.005-0.05 parts of curing agent, 0.1-5 parts of photoinitiator, and 15-80 parts of solvent. The high molecular weight acrylic polymer has a weight-average molecular weight of 800,000 to 1,600,000 and a glass transition temperature of 0 to 20°C. The high-functionality acrylate has a functionality of 6-12; The aspect ratio of the fibrous particles is (5~20):

1.

2. The anti-glare wide-viewing-angle hardening film according to claim 1, characterized in that, The high-functionality acrylates include any one or a combination of at least two of polyurethane acrylates, polyether acrylates, polyester acrylates, epoxy acrylates, and acrylic resins.

3. The anti-glare wide-viewing-angle curing film according to claim 1, characterized in that, The fibrous particles include any one or a combination of at least two of the following: calcium carbonate fibrous particles, barium sulfate fibrous particles, alumina fibrous particles, barium titanate fibrous particles, silica fibrous particles, and titanium dioxide fibrous particles.

4. The anti-glare wide-viewing-angle curing film according to claim 1, characterized in that, The curing agent includes any one or a combination of at least two of isocyanate curing agents and epoxy curing agents; The photoinitiator includes any one or a combination of at least two of α-hydroxyalkylphenyl ketone, acylphosphine oxide, and α-aminoalkylphenyl ketone.

5. The anti-glare wide-viewing-angle curing film according to claim 1, characterized in that, The thickness of the anti-glare wide-viewing angle hardening layer is 10~25μm; The thickness of the substrate is 20~200μm.

6. A method for preparing an anti-glare wide-viewing-angle curing film according to any one of claims 1 to 5, characterized in that, The preparation method includes the following steps: (1) Provide a slurry for an anti-glare, wide-viewing-angle hardening layer; (2) The slurry is coated onto one surface of the substrate and cured to obtain the anti-glare wide-viewing-angle hardened film.

7. The preparation method according to claim 6, characterized in that, The preparation method of the anti-glare wide-viewing-angle hardening layer slurry includes the following steps: (S1) Mix high-functionality acrylate, high molecular weight acrylic polymer with 20-30% of the formulation amount of solvent to obtain solution A; (S2) Mix the fibrous particles with the solvent to obtain solution B; the mass ratio of the fibrous particles to the solvent is 1:(2~3); (S3) Mix solution B with solution A to obtain solution C; (S4) Mix solution C with curing agent, photoinitiator and remaining solvent to obtain the slurry; The curing includes thermosetting and / or ultraviolet curing; The thermosetting temperature is 80~110℃, and the time is 3~10min; The ultraviolet curing includes a first-stage curing and a second-stage curing performed sequentially; the illuminance of the first-stage curing is 50~200mW / cm². 2 Energy is 100~300mJ / cm 2 The illuminance for the second stage of curing is 700~1000mW / cm². 2 Energy is 300~800 mJ / cm 2 .

8. A polarizer, characterized in that, The polarizer includes the anti-glare wide-viewing-angle hardened film as described in any one of claims 1 to 5.

9. A display panel, characterized in that, The display panel includes the polarizer as described in claim 8.

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