Hardening film, preparation method and coating used in hardening film

Abstract

The invention discloses a hardened film, a preparation method and used paint, the hardened film comprises an anti-dazzle layer and a hardened layer which are laminated on a base material layer, anti-dazzle particles are dispersed in the anti-dazzle layer, the anti-dazzle particles are embedded in the hardened layer and protrude out of the surface of the hardened layer, and the anti-dazzle particles are dispersed in the hardened layer. And the hardened film satisfies the formula: 2 [mu] m > = the average particle size of the anti-dazzle particles-(the thickness of the anti-dazzle layer + the thickness of the hardened layer) > = 1.5 [mu] m. The anti-dazzle particles are dispersed in the functional layer of the hardened film, and the anti-dazzle particles protrude out of the surface of the hardened layer, so that when a finger presses the surface of the hardened film, the finger can make contact with the surface of the hardened film layer as little as possible, and residues of stains and fingerprints are reduced. Furthermore, the hardened film meets the condition that the average particle size of the anti-dazzle particles is larger than or equal to 2 microns and the sum of the thickness of the anti-dazzle layer and the thickness of the hardened layer is larger than or equal to 1.5 microns, the wear resistance of the hardened film can be considered, and the overall anti-dazzle performance of the hardened film is not lost.

Description

Technical Field

[0001] This invention relates to the field of protective film technology, and more specifically, to a hardened film, a preparation method thereof, and a coating used thereon. Background Technology

[0002] As living standards continue to improve, people are becoming increasingly reliant on electronic products. Touchscreens, a standard component of electronic devices such as tablets and smartphones, generally use protective films to prevent scratches. However, due to oil residue from sweaty hands, fingerprints easily form on the protective film during use, affecting not only aesthetics but also the user experience.

[0003] To address this issue, existing technologies enhance the hydrophobic and oleophobic properties of the hardened film by electroplating fluorosilicone material onto its surface, thereby achieving anti-fouling and anti-fingerprint functionality. This anti-glare hardened film effectively prevents the adhesion of sweat and oil, facilitating fingerprint removal. However, this technology suffers from limitations such as complex processes, high processing difficulty, and high manufacturing costs, resulting in poor economic efficiency and hindering large-scale application.

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

[0005] The purpose of this invention is to provide a hardened film, a preparation method, and a coating used thereon, wherein the hardened film has anti-fouling and anti-fingerprint effects, while also taking into account wear resistance.

[0006] This invention is implemented as follows: In a first aspect, the present invention provides a hardened film comprising an anti-glare layer and a hardened layer stacked on a substrate layer, wherein anti-glare particles are dispersed in the anti-glare layer, the anti-glare particles are embedded in the hardened layer and protrude from the surface of the hardened layer, and the hardened film satisfies 2μm≥average particle size of anti-glare particles - (thickness of anti-glare layer + thickness of hardened layer)≥1.5μm.

[0007] In an optional embodiment, the anti-glare particles are selected from at least one of polyacrylate, polystyrene, polymethacrylate, melamine, silicon dioxide, zinc oxide, PS-PMMA, and SiO2-PMMA; And / or, the average particle size of the anti-glare particles is 3-10 μm.

[0008] In an optional embodiment, the anti-glare layer is a polyurethane acrylate film; And / or, the hardened layer is a polyurethane acrylate film, and the hardened layer includes nanoscale inorganic particles; And / or, the substrate layer is a transparent film.

[0009] In an optional embodiment, the inorganic particles include one or more of silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, calcium carbonate, magnesium carbonate, aluminum hydroxide, and titanium dioxide. And / or, the average particle size of inorganic particles is 1-100 nm.

[0010] In an optional embodiment, the Spc value of the surface where the anti-glare layer contacts the hardened layer is 550-750 μm. -1 .

[0011] In an optional embodiment, the thickness of the anti-glare layer is 1.4 μm - 2.2 μm; And / or, the thickness of the hardened layer is ≥0.5μm.

[0012] In a second aspect, the present invention provides a coating for preparing the hardened film described in the foregoing embodiments, comprising an anti-glare coating for forming an anti-glare layer and a hardening coating for forming a hardened layer; The anti-glare coating includes: First, 20-40 parts by weight of polyurethane acrylate; Anti-glare particles: 1-10 parts by weight; 40-70 parts by weight of the first organic solvent; 1-5 parts by weight of the first photoinitiator; First leveling agent: 0.1-1 parts by weight; 1-5 parts by weight of the first dispersant; The hardening coating includes: 10-40 parts by weight of second polyurethane acrylate; Inorganic particles, 1-10 parts by weight; 60-90 parts by weight of the second organic solvent; 0.1-1 parts by weight of the second photoinitiator; Second leveling agent: 0.02-0.16 parts by weight; 0.1-1 parts by weight of the second dispersant.

[0013] In an optional embodiment, the first polyurethane acrylate has a functionality of 2-10 and a molecular weight of 1000-30000. And / or, the first organic solvent comprises one or more of ethyl acetate, butyl acetate, methyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; And / or, the first photoinitiator comprises one or more of 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, benzoin dimethyl ether, xylene ketone, 2-isopropylthioxanthone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and TPO.

[0014] In an optional embodiment, the second polyurethane acrylate has a functionality of 6-15 and a molecular weight of 1000-20000. And / or, the second organic solvent comprises one or more of ethyl acetate, butyl acetate, methyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; And / or, the second photoinitiator comprises one or more of 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, benzoin dimethyl ether, xylene ketone, 2-isopropylthioxanthraquinone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and TPO.

[0015] Thirdly, the present invention provides a method for preparing a hardened film, comprising: forming the anti-glare coating on a substrate layer to obtain an anti-glare layer; The hardening coating is formed into a film on the anti-glare layer to obtain the hardened film.

[0016] The present invention has the following beneficial effects: The functional layer of the hardened film in this application contains dispersed anti-glare particles, which protrude from the surface of the hardened layer. This minimizes contact between the finger and the surface of the hardened film when the finger is pressed, reducing the residue of dirt and fingerprints. Furthermore, the hardened film satisfies the condition that 2μm ≥ average particle size of anti-glare particles - (anti-glare layer thickness + hardened layer thickness) ≥ 1.5μm, which balances the wear resistance of the hardened film without compromising its overall anti-glare properties. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the hardened membrane in this application; Figure 2 The images show the anti-glare effect tests performed on Example 1 (left), Comparative Example 1 (middle), and Comparative Example 6 (right), respectively.

[0019] Illustration: 1-Substrate layer; 2-Anti-glare layer; 3-Curing layer; 4-Anti-glare particles. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0021] This invention provides a hardened film with the following structure: Figure 1 As shown, the material includes an anti-glare layer 2 and a hardening layer 3 stacked on a substrate layer 1. Anti-glare particles 4 are dispersed in the anti-glare layer 2. The anti-glare particles 4 are embedded in the hardening layer 3 and protrude from the surface of the hardening layer 3. The hardening film satisfies the condition that 2μm ≥ average particle size of anti-glare particles - (thickness of anti-glare layer + thickness of hardening layer) ≥ 1.5μm. Specifically, the average particle size of anti-glare particles - (thickness of anti-glare layer + thickness of hardening layer) can be 1.5 μm, 1.55 μm, 1.6 μm, 1.65 μm, 1.7 μm, 1.75 μm, 1.8 μm, 1.85 μm, 1.9 μm, 1.95 μm, or 2 μm.

[0022] In this application, anti-glare particles 4 are dispersed within the functional layer of the hardened film, and these particles protrude from the surface of the hardened layer 3. This minimizes contact between the fingers and the surface of the hardened film when pressed, reducing the residue of dirt and fingerprints. Furthermore, the average height of the anti-glare particles 4 protruding from the surface of the hardened layer 3 is 1.5-2 μm, which balances the wear resistance of the hardened film with the overall anti-glare properties.

[0023] In an optional embodiment, the anti-glare particles 4 are selected from at least one of polyacrylate, polystyrene, polymethyl methacrylate, melamine, silica, zinc oxide, PS-PMMA (polystyrene-polymethyl methacrylate) composite microspheres and SiO2-PMMA (silica-polymethyl methacrylate) composite microspheres; these anti-glare particles 4 help reduce glare, improve light transmission uniformity, and are also wear-resistant and scratch-resistant, which helps ensure visual comfort and material stability.

[0024] And / or, the anti-glare particles 4 have an average particle size of 3-10 μm, such as 3 μm, 3.8 μm, 4.6 μm, 5.4 μm, 6.2 μm, 7.0 μm, 7.8 μm, 8.6 μm, 9.4 μm, or 10 μm. This effectively reduces glare from strong light, improving visual clarity and comfort.

[0025] In an optional embodiment, the anti-glare layer 2 is a polyurethane acrylate film; the polyurethane acrylate film has high light transmittance and scratch resistance, and as the anti-glare layer 2, it has excellent anti-glare effect and good adhesion to the substrate.

[0026] And / or, the hardened layer 3 is a polyurethane acrylate film, and the hardened layer 3 includes nano-sized inorganic particles; the presence of nano-sized inorganic particles in the hardened layer 3 is beneficial for improving hardness and wear resistance, and the film is uniform, which is beneficial for both protection and adhesion.

[0027] And / or, the substrate layer 1 is a transparent film, which can be used as a protective film for electronic products such as mobile phones. The substrate layer 1 can be selected from one of polyethylene terephthalate (PET) resin-based film, polycarbonate (PC)-based film, cellulose triacetate (TAC)-based film, and polymethyl methacrylate (PMMA)-based film, preferably polyethylene terephthalate resin-based film. The thickness of the substrate layer 1 can be 25 μm to 200 μm.

[0028] In an optional embodiment, the inorganic particles include one or more of silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, calcium carbonate, magnesium carbonate, aluminum hydroxide, and titanium dioxide, which is beneficial for balancing the hardness and wear resistance of the hardened layer 3.

[0029] And / or, the average particle size of inorganic particles is 1-100nm, which is beneficial to balance the hardness and wear resistance of the hardened layer 3.

[0030] In an optional embodiment, the Spc value of the surface where the anti-glare layer 2 contacts the hardened layer 3 is 550-750 μm. -1 For example, 550 μm -1 570 μm -1 590 μm -1 610 μm -1 630 μm -1 650 μm -1 670 μm -1 690 μm -1 710μm, 730 μm -1 750 μm -1 .

[0031] Spc represents the arithmetic mean of the principal curvatures of the convex surface peaks of the anti-glare layer. A smaller value indicates a more rounded contact point with other objects, while a larger value indicates a sharper contact point. The Spc value of the surface where the anti-glare layer 2 contacts the hardened layer 3 is 550-750 μm. -1The anti-glare particles 4 protrude from the surface of the hardened layer 3 at an average height of 1.5-2μm, which ensures that the contact area between the finger and the test surface is small enough while ensuring that the anti-glare particles 4 are not sharp. This maintains a good feel and ensures that the protruding structure is not damaged and scratched during the wear resistance test.

[0032] In an optional embodiment, the thickness of the anti-glare layer is 1.4μm-2.2μm, for example 1.4μm, 1.5μm, 1.6μm, 1.7μm, 1.8μm, 1.9μm, 2.0μm, 2.1μm, or 2.2μm.

[0033] And / or, the thickness of the hardened layer is ≥0.5μm, preferably 0.5μm-1.5μm, for example 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1.0 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm.

[0034] The thickness of the hardened layer 3 is ≥0.5μm. Combined with the fact that the hardened film satisfies 2μm≥average particle size of anti-glare particles - (anti-glare layer thickness + hardened layer thickness)≥1.5μm, the wear resistance of the overall coating surface can be further improved without sacrificing the overall anti-glare performance.

[0035] When the thickness of the hardened layer 3 is ≥0.5μm and the average particle size of the anti-glare particles - (anti-glare layer thickness + hardened layer thickness) is less than 1.5μm, the overall wear resistance is good, but the anti-glare performance is slightly poor, and the anti-fingerprint performance does not reach the optimal effect. Conversely, when the thickness of the hardened layer 3 is ≥0.5μm and the average particle size of the anti-glare particles - (anti-glare layer thickness + hardened layer thickness) is greater than 2μm, the overall anti-glare performance is excellent, but the protrusions are sharp, which greatly reduces the wear resistance of the final product. When the thickness of the hardened layer 3 is less than 0.5μm, the wear resistance is poor regardless of any change in the average particle size of the anti-glare particles - (anti-glare layer thickness + hardened layer thickness). However, as the average particle size of the anti-glare particles - (anti-glare layer thickness + hardened layer thickness) increases, the wear resistance shows a decreasing trend. When the thickness of the hardened layer 3 is ≥0.5μm and the hardened film satisfies 2μm ≥ average particle size of the anti-glare particles - (anti-glare layer thickness + hardened layer thickness) ≥ 1.5μm, the anti-fingerprint performance increases with the increase of the protrusion height.

[0036] This embodiment ensures that the hardened film has excellent anti-glare and wear resistance, while overcoming the problems of poor anti-fouling and fingerprint resistance of conventional hardened films. It greatly reduces the manufacturing cost and can be mass-produced, bringing good economic benefits.

[0037] The present invention also provides a coating for preparing the hardened film described in the foregoing embodiments, comprising an anti-glare coating for forming an anti-glare layer 2 and a hardening coating for forming a hardened layer 3; The anti-glare coating includes: First, 20-40 parts by weight of polyurethane acrylate, for example 20 parts by weight, 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, 34 parts by weight, 36 parts by weight, 38 parts by weight, and 40 parts by weight; Anti-glare particles in 1-10 parts by weight, for example, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, and 10 parts by weight; The first organic solvent is 40-70 parts by weight, for example 40 parts by weight, 43 parts by weight, 46 parts by weight, 49 parts by weight, 52 parts by weight, 55 parts by weight, 58 parts by weight, 61 parts by weight, 64 parts by weight, 67 parts by weight, or 70 parts by weight; The first photoinitiator is 1-5 parts by weight, for example, 1 part by weight, 1.4 parts by weight, 1.8 parts by weight, 2.2 parts by weight, 2.6 parts by weight, 3.0 parts by weight, 3.4 parts by weight, 3.8 parts by weight, 4.2 parts by weight, 4.6 parts by weight, or 5 parts by weight; The first leveling agent is 0.1-1 parts by weight, for example, 0.1 parts by weight, 0.2 parts by weight, 0.3 parts by weight, 0.4 parts by weight, 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight; The first dispersant is 1-5 parts by weight, for example, 1 part by weight, 1.4 parts by weight, 1.8 parts by weight, 2.2 parts by weight, 2.6 parts by weight, 3.0 parts by weight, 3.4 parts by weight, 3.8 parts by weight, 4.2 parts by weight, 4.6 parts by weight, or 5 parts by weight; The hardening coating includes: The second polyurethane acrylate is 10-40 parts by weight, for example 10 parts by weight, 13 parts by weight, 16 parts by weight, 19 parts by weight, 22 parts by weight, 25 parts by weight, 28 parts by weight, 31 parts by weight, 34 parts by weight, 37 parts by weight, and 40 parts by weight. Inorganic particles, 1-10 parts by weight, for example, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight; The second organic solvent is 60-90 parts by weight, for example 60 parts by weight, 63 parts by weight, 66 parts by weight, 69 parts by weight, 72 parts by weight, 75 parts by weight, 78 parts by weight, 81 parts by weight, 84 parts by weight, 87 parts by weight, or 90 parts by weight; The second photoinitiator is 0.1 to 1 part by weight, for example, 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, 0.9 part by weight, or 1.0 part by weight; The second leveling agent is used in amounts of 0.02 to 0.16 parts by weight, for example, 0.02 parts by weight, 0.04 parts by weight, 0.06 parts by weight, 0.08 parts by weight, 0.10 parts by weight, 0.12 parts by weight, 0.14 parts by weight, and 0.16 parts by weight. The second dispersant is 0.1-1 parts by weight, for example, 0.1 parts by weight, 0.2 parts by weight, 0.3 parts by weight, 0.4 parts by weight, 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1.0 parts by weight.

[0038] By using the above-mentioned coating, it is beneficial for the anti-glare particles 4 and inorganic particles to be evenly dispersed in the coating. As a result, after film formation, the anti-glare particles 4 can be evenly dispersed in the anti-glare layer 2, and the inorganic particles can be evenly dispersed in the hardened layer 3, thus better balancing the anti-glare, wear resistance, hardness, and oil and fingerprint resistance properties.

[0039] In an optional embodiment, the first polyurethane acrylate has a functionality of 2-10, such as 2, 3, 4, 5, 6, 7, 8, 9, 10; and a molecular weight of 1000-30000, such as 1000, 4000, 7000, 10000, 13000, 16000, 19000, 22000, 25000, 28000, 30000. And / or, the first organic solvent comprises one or more of ethyl acetate, butyl acetate, methyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; And / or, the first photoinitiator comprises one or more of 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, benzoin dimethyl ether, xylene ketone, 2-isopropylthioxanthone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and TPO.

[0040] In an optional embodiment, the functionality of the second polyurethane acrylate is 6-15, for example 6, 7, 8, 9, 10, 11, 12, 13, 14, 15; and the molecular weight is 1000-20000, for example 1000, 3000, 5000, 7000, 9000, 11000, 13000, 15000, 17000, 19000, 20000. And / or, the second organic solvent comprises one or more of ethyl acetate, butyl acetate, methyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; And / or, the second photoinitiator comprises one or more of 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, benzoin dimethyl ether, xylene ketone, 2-isopropylthioxanthraquinone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and TPO.

[0041] The present invention also provides a method for preparing a hardened film, comprising: forming the anti-glare coating on a substrate layer 1 to obtain an anti-glare layer 2; The hardened coating is formed on the anti-glare layer 2 to obtain the hardened film.

[0042] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0043] Examples and Comparative Examples Both the embodiments and comparative examples of this application provide a hardened film, including an anti-glare (AG) layer 2 and a hardened (HC) layer 3 stacked on a substrate layer 1. Anti-glare particles 4 are dispersed in the anti-glare layer 2, the anti-glare particles 4 are embedded in the hardened layer 3, and the anti-glare particles 4 protrude from the surface of the hardened layer 3. The method for preparing the hardened film in this embodiment includes: curing the anti-glare coating onto the substrate layer 1 to form an anti-glare layer 2; the curing conditions for the anti-glare layer 2 are: drying at 80°C for 2 minutes, followed by UV curing at an energy of 127 mJ / cm². 2 UV curing at a vehicle speed of 10m / min.

[0044] The hardening coating is cured onto the anti-glare layer 2 to form a film, thus obtaining the hardened film; the curing conditions are: drying at 80°C for 2 minutes, followed by UV curing at an energy of 148 mJ / cm². 2 UV curing at a vehicle speed of 10m / min.

[0045] In the anti-glare coating used to form anti-glare layer 2: The first polyurethane acrylate has a functionality of 9 and a molecular weight of 5500. It is KAYARAD UX-9001W from Wuxi Chemical Co., Ltd. The anti-glare particles are PS-PMMA organic anti-glare particles; The first organic solvent is a mixed solvent of butyl acetate, n-propanol and methyl isobutyl ketone, and the mass ratio of butyl acetate, n-propanol and methyl isobutyl ketone is 21:29:20. The first photoinitiator is Irgacure 184; The first leveling agent was Lencolo 3108; The primary dispersant is Efka® PX 4360; The hardening coating used to form hardened layer 3 includes: The second polyurethane acrylate is resin 120-4 from Guangdong Jingwei New Materials Co., Ltd.; The inorganic particles are nano-SiO2 with an average particle size of 30 nm. The organic solvent is a mixture of butyl acetate, butanone, and propylene glycol methyl ether, and the mass ratio of butyl acetate, butanone, and propylene glycol methyl ether is 20:30:20. The second photoinitiator is Irgacure 184; The second leveling agent is Lencolo 3108; The second dispersant is Efka® PX 4360.

[0046] Specifically, the dosage (wt%) of each component and some performance test results in each embodiment and comparative example are shown in Table 1.

[0047] Table 1

[0048] The methods used for some performance tests are as follows in Table 1: 1. Adhesion test method: According to standard ASTMD 3359, first draw a grid on the surface of the film with a cross-cutting tool, then stick 3M 600 tape on the drawn grid, and quickly peel off the tape at a 180° angle to observe the grid peeling situation.

[0049] 5B: The coating has not peeled off at all; 4B: Cross-cut coating peeling area <5%; 3B: Cross-cut coating peeling area is 5% - 15%; 2B: Cross-cut coating peeling area is 15% - 35%; 1B: Cross-cut coating peeling area: 35% - 65%; 0B: Area of ​​cross-cut coating peeling > 65%.

[0050] 2. Anti-glare effect test method: The hardened films prepared in each embodiment and comparative example were attached to a black acrylic plate with the hardened layer 3 facing upwards. After repeated inspections under three wavelength lamps, the clearer the lamp outline on the film surface, the worse the anti-glare performance; conversely, the clearer the outline, the better the anti-glare performance. Anti-glare test results from some embodiments and comparative examples are shown in the figures below. Figure 2 As shown.

[0051] Judgment criteria: The lamp tube outline is uniformly diffused, with excellent anti-glare performance, marked as "◎"; the lamp tube outline is faintly visible, with average anti-glare performance, marked as "△"; the lamp tube outline is clearly visible, with poor anti-glare performance, marked as "×".

[0052] 3. Test methods for light transmittance and haze: The test was conducted using a Japanese Denshoku NDH 2000N haze meter.

[0053] 4. Sharpness testing method: According to the JIS K7105 standard, using an image sharpness measuring instrument (model: ICM-1T) manufactured by SUGA TEST INSTRUMENTS, the transmittance image sharpness of the sample was tested under five different width optical comb conditions of 0.125mm, 0.25mm, 0.5mm, 1.0mm, and 2.0mm through the transmittance measurement method. Finally, the sum of the transmittance image sharpness measured values ​​corresponding to the above five optical combs was calculated and recorded.

[0054] 5. Abrasion resistance test method: With a load of 1000g, a 2cm×2cm abrasion-resistant head made of Bonston #0000 steel wool was pressed vertically onto the thin film coating surface and a reciprocating friction test was performed. One round trip was counted as one test. After each test, the coating surface was observed for scratches, exposed substrate, wear, or other damage. The number of times scratches, exposed substrate, wear, or other damage first appeared was calculated and recorded.

[0055] 6. Fingerprint resistance test method: The film was bonded to black glass, and tested using a Konica 3600A spectrophotometer. The L*, a*, and b* values ​​in SCI mode were measured before and after fingerprint pressing. The values ​​before fingerprint pressing were recorded as L*1, a*1, and b*1, and the values ​​after fingerprint pressing were recorded as L*2, a*2, and b*2. The color difference Δ was calculated. E Value, ΔE=[(ΔL*)] 2 +(Δa*) 2 +(Δb*) 2 ] 1 / 2 , ΔL*=L*2-L*1, Δa*=a*2-a*1, Δb*=b*2-b*1: △ E A value of 0-0.1 is considered anti-fingerprint; △ E A value of 0.1-0.15 is considered a slight fingerprint residue; △ E A value of 0.15-0.30 is considered moderate fingerprint residue; △ E A value >0.30 is considered severe fingerprint residue. 7. SPC value testing method: The laser microscope test was conducted by placing the sample on the laser microscope stage, adjusting the objective lens to 20x, selecting the laser mode for observation, fine-tuning the microscope focal length to move the focal point from above the AG coating to below the thickness of the AG coating, ensuring a comprehensive scan of the AG film surface structure, calibrating the reference surface after the test, measuring the roughness value, displaying the SPC value and recording it.

[0056] As can be seen from Table 1: The hardened film in Examples 1-4 can achieve the effects of wear resistance, anti-glare and anti-fingerprint.

[0057] In Comparative Example 1, the SPC value of the anti-glare layer is >550 μm -1 The average particle size of the anti-glare particles - (anti-glare layer thickness + hardening layer thickness) < 1.5μm, which makes the anti-glare effect of the hardened film generally poor, and the surface protrusions are not numerous enough, resulting in slightly poor fingerprint resistance.

[0058] In Comparative Example 2, the SPC value of the anti-glare layer is <550 μm -1 It has good wear resistance, but its anti-glare effect is average and its anti-fingerprint effect is poor.

[0059] In Comparative Example 3, the SPC value of the anti-glare layer is >550 μm -1 The hardened layer is too thin, which makes the hardened film less wear-resistant, but it has good anti-glare and anti-fingerprint effects.

[0060] In Comparative Example 4, the SPC value of the anti-glare layer is <550 μm -1 It has poor wear resistance, but good anti-glare and anti-fingerprint effects.

[0061] In Comparative Example 5, the SPC value of the anti-glare layer is >750 μm -1 Although the thickness of the hardened layer is >0.5μm, it has poor wear resistance, but good anti-glare and anti-fingerprint effects.

[0062] The SPC value of the anti-glare layer in Comparative Example 6 is <550μm -1 It has good wear resistance, but its anti-glare and anti-fingerprint effects are poor.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hardened film, characterized by, The anti-glare layer and the hardening layer are stacked on the substrate layer, the anti-glare layer has anti-glare particles dispersed therein, the anti-glare particles are embedded in the hardening layer and protrude from the surface of the hardening layer, and the hardening film satisfies 2 μm ≥ anti-glare particle average particle size - (anti-glare layer thickness + hardening layer thickness) ≥ 1.5 μm.

2. The hardened film according to claim 1, characterized by The anti-glare particles are selected from at least one of polyacrylate, polystyrene, polymethacrylate, melamine, silicon oxide, zinc oxide, PS-PMMA, and SiO2-PMMA; And / or, the anti-glare particle average particle size is 3-10 μm.

3. The hardened film according to claim 1, characterized by The anti-glare layer is a polyurethane acrylate film; And / or, the hardening layer is a polyurethane acrylate film, and the hardening layer includes nanoscale inorganic particles; And / or, the substrate layer is a transparent film.

4. The hardened film according to claim 3, characterized in that, The inorganic particles include one or more of silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, calcium carbonate, magnesium carbonate, aluminum hydroxide, and titanium dioxide; And / or, the inorganic particle average particle size is 1-100 nm.

5. The hardened film according to claim 1, characterized by The surface SPC of the anti-glare layer in contact with the hard coat layer has a value of 550-750 μm -1 .

6. The hardened film according to claim 1, characterized by The anti-glare layer thickness is 1.4 μm - 2.2 μm; And / or, the hardening layer thickness is ≥ 0.5 μm.

7. A coating for producing the hardened film according to claim 1, characterized by, The anti-glare coating for forming the anti-glare layer and the hardening coating for forming the hardening layer are included; The anti-glare coating includes: The first polyurethane acrylate 20-40 parts by weight; Anti-glare particles 1-10 parts by weight; The first organic solvent 40-70 parts by weight; The first photoinitiator 1-5 parts by weight; The first leveling agent 0.1-1 parts by weight; The first dispersing agent 1-5 parts by weight; The hardening coating includes: The second polyurethane acrylate 10-40 parts by weight; Inorganic particles 1-10 parts by weight; The second organic solvent 60-90 parts by weight; The second photoinitiator 0.1-1 parts by weight; The second leveling agent 0.02-0.16 parts by weight; The second dispersing agent 0.1-1 parts by weight.

8. The coating of claim 7, wherein, The first polyurethane acrylate has a functionality of 2-10 and a molecular weight of 1000-30000; And / or, the first organic solvent includes one or more of ethyl acetate, butyl acetate, dimethyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; And / or, the first photoinitiator includes one or more of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, benzoin dimethyl ether, xanthone, 2-isopropylthioxanthone, 2,4,6(trimethylbenzoyl) diphenyl phosphine oxide, and TPO.

9. The coating of claim 7, wherein, The second polyurethane acrylate has a functionality of 6-15 and a molecular weight of 1000-20000; And / or, the second organic solvent includes one or more of ethyl acetate, butyl acetate, dimethyl ether, propylene glycol methyl ether, methyl isobutyl ketone, butanone, cyclohexanone, n-butanol, n-propanol, isopropanol, toluene, and xylene; and / or the second photoinitiator comprises one or several of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropanone, benzoin methyl ether, xanthone, 2-isopropylthioxanthone, 2,4,6(trimethylbenzoyl) diphenyl phosphine oxide and TPO.

10. A method for producing the hardened film according to any one of claims 1 to 6, characterized by, comprising: forming a film of the anti-glare coating among the coatings of any one of claims 7-9 on a substrate layer to obtain an anti-glare layer; forming a film of the hardening coating among the coatings of any one of claims 7-9 on the anti-glare layer to obtain the hardening film.

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