A high-haze anti-glare film and a method for preparing the same

Abstract

The application discloses a high-haze anti-dazzle film and a preparation method thereof. The coating solution of the anti-dazzle layer of the high-haze anti-dazzle film comprises acrylic resin oligomers and anti-dazzle particles. The high-haze anti-dazzle film has excellent anti-environmental light, high transmittance and integral black effect, and can effectively solve the problem that the existing high-haze anti-dazzle film cannot be compatible with high transmittance and integral black effect.

Description

Technical Field

[0001] This invention relates to the field of anti-glare film technology, and in particular to an anti-glare film with high fog resistance, high transmittance and improved all-around black effect, and its preparation method. Background Technology

[0002] With the continuous development of display technology, people are paying more and more attention to the actual display effect of display devices, such as anti-glare performance, screen black effect, and low gloss. Good anti-glare and gloss performance can reduce the glare of light and reduce eye fatigue; while a good screen black effect can enhance the contrast and color saturation of the displayed image. In the field of traditional backlit displays, such as televisions, computers, and tablets, the display effect can be adjusted by adjusting the backlight and backlight module. However, in the fields of direct display, projection, and outdoor display, in order to achieve effects such as resistance to ambient light and black effect, it is often necessary to adjust them through external optical films.

[0003] In the field of MiniLED direct-view displays, a high-fog anti-glare layer is often applied to the outermost layer of the display screen. This high fogging characteristic provides excellent shielding (covering the LED beads under the display film) and effective resistance to ambient light. Similarly, in the field of laser projection displays, the outermost layer of the projection screen is also typically a high-fog anti-glare layer to ensure effective resistance to ambient light. To achieve high contrast and a seamless black effect in these display fields, a black coloring layer is needed beneath the high-fog anti-glare layer. However, in existing technologies, the high-fog anti-glare film may struggle to maintain good high transmittance, or it rarely considers compatibility with a seamless black effect. While adding carbon black or other black substances to the anti-glare layer can improve the seamless black effect to some extent, it also reduces the overall light transmittance of the anti-glare film.

[0004] CN1794016A discloses an anti-glare hard coating film, which has an anti-glare hard coating containing microparticles on at least one side of a transparent film substrate.

[0005] The thickness of the hard coating is 15 μm to 30 μm, and the average particle size is 30% to 75% of the thickness of the hard coating.

[0006] The θa of the uneven shape formed by the particles, according to JIS B 0601, is 0.4° or more and 1.5° or less.

[0007] JP4651705B2 discloses at least one transparent base film and an anti-glare layer containing at least first light-transmitting microparticles and second light-transmitting microparticles having a particle size different from that of the light-transmitting resin. The first light-transmitting microparticles have a refractive index 0.04 to 0.20 greater than that of the translucent resin. The second translucent microparticles are larger than the particle size of the first translucent microparticles. The anti-glare layer protrudes from the surface of the anti-glare layer. The refractive index difference between the light-transmitting resin layers is less than 0.3 der.

[0008] CN115963589A discloses a high-haze anti-glare film, comprising:

[0009] Transparent substrate; and

[0010] An anti-glare coating is formed on the transparent substrate, and the anti-glare coating comprises an acrylic adhesive resin and a plurality of amorphous silica microparticles;

[0011] The high-haze anti-glare film has a total haze Ht greater than 20%, where Ht is the sum of the surface haze Hs and the internal haze Hi of the film, and the internal haze Hi and the total haze Ht satisfy the following relationship: 0.01 <Hi / Ht<0.25。

[0012] US20080112055A1 discloses an anti-glare diffuser component, comprising: a transparent substrate; and an anti-glare diffuser layer comprising an adhesive matrix, particles A and particles B, wherein the front surface of the layer is irregular; wherein the difference between the refractive index of particle A and the refractive index of the adhesive matrix is ​​less than or equal to 0.02, the difference between the refractive index of particle B and the refractive index of the adhesive matrix is ​​0.03-0.20, wherein the average particle size of particle A is greater than the average film thickness of the anti-glare diffuser layer, and the average particle size of particle B is less than 0.9 times the average film thickness of the anti-glare diffuser layer.

[0013] CN115963584A discloses a high-haze anti-glare film, comprising:

[0014] Transparent substrate; and

[0015] An anti-glare coating is formed on the transparent substrate. The anti-glare coating comprises an acrylic adhesive resin, a plurality of amorphous silica microparticles and a plurality of spherical organic microparticles, wherein the spherical organic microparticles are monodisperse and have an average particle size smaller than the average particle size of the amorphous silica microparticles.

[0016] The high-haze anti-glare film has a total haze Ht greater than 40%, where the total haze Ht is the sum of the surface haze Hs and the internal haze Hi of the high-haze anti-glare film, and the internal haze Hi and the total haze Ht conform to the relationship: 0.25 <Hi / Ht<0.75。

[0017] CN106338783A discloses an anti-glare and anti-reflective optical film, characterized in that: it comprises a transparent support and an anti-glare and anti-reflective hard coating layer coated on at least one side of the transparent support. The anti-glare and anti-reflective hard coating layer comprises: a low-refractive-index material with a refractive index of 1.10 to 1.45 and a high-refractive-index material with a refractive index of 1.46 to 2.00; wherein the difference in refractive index between the two materials is greater than 0.01, and the difference in surface energy is greater than 4 mN / m; the low-refractive-index material and the high-refractive-index material in the anti-glare and anti-reflective hard coating layer are both UV-curable materials, and the weight ratio is 1 / 9 to 9 / 1.

[0018] CN113402976B discloses a high-transparency, high-fog, anti-glare coating comprising a UV-curable borosilicate resin, a UV-curable acrylic resin, a reactive diluent, a photoinitiator, and additives. The coating system is characterized by being a particle-free system, while the UV-curable borosilicate resin and acrylic resin used are a limited compatibility system. The borosilicate resin has a higher surface energy than the acrylic resin, resulting in an uneven, island-like structure after curing, achieving surface diffusion and scattering.

[0019] The coating prepared by this paint has a haze of 60% to 85% and a transmittance of over 90%.

[0020] CN107739159B discloses a high-haze, low-gloss anti-glare film and its preparation method, comprising a glass substrate, and

[0021] An anti-glare coating is formed on the transparent glass substrate. The anti-glare coating comprises an anti-glare base liquid composed of silicate ester, pure water, acid, and organic solvent, as well as inorganic nanoparticles, wherein the refractive index of the inorganic nanoparticles is higher than 2.0. The anti-glare film layer has a thickness of 0.1-2 μm and a surface roughness of 0.1-0.25 μm.

[0022] However, existing anti-glare film technologies either fail to adequately consider the compatibility of high fog characteristics, high transmittance characteristics, and gloss, or fail to achieve good surface hardness and surface reflectivity. Furthermore, existing technical solutions do not effectively consider the seamless black effect of the displayed image after the anti-glare film is applied.

[0023] Therefore, it is necessary to develop a high-fog anti-glare film, especially an anti-glare film that combines high transmittance, high fog level, and the ability to effectively enhance the all-black effect of the display screen. Summary of the Invention

[0024] To address the technical problem that existing high-fog anti-glare films cannot achieve both high transmittance and a seamless black effect, this invention provides a high-fog anti-glare film and its preparation method. This high-fog anti-glare film simultaneously possesses excellent ambient light resistance, high transmittance, and a seamless black effect, effectively solving the problem that existing high-fog anti-glare films cannot achieve both high transmittance and a seamless black effect.

[0025] To address the aforementioned technical problems, this invention provides a high-fog anti-glare film, comprising a substrate and an anti-glare layer. The anti-glare layer is coated on the substrate, and the coating of the anti-glare layer comprises acrylic resin oligomers and anti-glare particles. The anti-glare particles are solid micron particles and hollow nanoparticles. The thickness of the anti-glare film is 2-50 μm, and the transmittance of the anti-glare film is 91.00%-98.00%.

[0026] Furthermore, the substrate is preferably a substrate with high transmittance and low brightness (luminance L value in Lab color space).

[0027] Furthermore, the material of the substrate layer is selected from polyethylene terephthalate (PET), cellulose triacetate (TAC), polycarbonate (PC), or polymethyl methacrylate (PMMA).

[0028] Furthermore, the thickness of the substrate is preferably 50-250μm, or 80-220μm, or 100-200μm, or 120-180μm, or 140μm, or 150μm, or 160μm.

[0029] Furthermore, the anti-glare coating liquid includes acrylic resin oligomers, acrylate monomers, photoinitiators, leveling agents, anti-glare particles, and organic solvents.

[0030] Furthermore, the anti-glare coating liquid comprises the following components: 18.00%-30.00% acrylic resin oligomer, 4.00%-8.00% acrylate monomer, 0.90%-1.90% photoinitiator, 0.15%-0.40% leveling agent, 4.00%-10.00% anti-glare particles, and 60.00%-75.00% organic solvent, wherein the percentages are by weight.

[0031] Furthermore, the anti-glare coating liquid comprises the following components: 19.08%-27.06% (or 19.50%, 20.00%, 21.00%, 23.10%, 25.00%) of acrylic resin oligomer, 4.77%-6.77% (or 4.90%, 5.20%, 5.80%, 6.10%) of acrylate monomer, and 1.19%-1.69% (or 1.25%, 1.30%, 1.40%, 1. 50% to 1.60% of a photoinitiator, 0.24% to 0.34% (or 0.28% to 0.30%) of a leveling agent, 4.42% to 9.58% (or 5.10%, 6.00%, 7.10%, 8.00%, 9.10%) of anti-glare particles, and 55.17% to 70.30% (or 58.10%, 60.00%, 65.20%, 69.00%) of an organic solvent, wherein the percentages are by weight.

[0032] Furthermore, the acrylic resin oligomer is one or a combination of two of the following: a decafunctional polyurethane acrylic resin oligomer or a nonafunctional polyurethane acrylic resin oligomer.

[0033] Furthermore, the anti-glare coating liquid comprises the following components: 13.36%-18.94% (or 14.00%, 15.10%, 16.20%, 17.00%) of decafunctional polyurethane acrylic resin oligomer, 5.72%-8.12% (or 6.10%, 7.00%, 7.50%) of nonafunctional polyurethane acrylic resin oligomer, 4.77%-6.77% (or 4.90%, 5.20%, 5.80%, 6.50%) of trifunctional acrylate monomer, 0.48%-0.68% (or 0.50%, 0.55%, 0.60%) of photoinitiator TPO, 0.82%-1.01% (or 0.88%, 0.95%) of photoinitiator 1173, and 0.24%-0.34% of [unclear - possibly a specific ingredient or component]. The composition includes: a balancing agent (or 0.26%, 0.28%, 0.30%, 0.32%), 2.46%-3.48% (or 2.60%, 2.90%, 3.20%) of first anti-glare particles, 0.00%-3.42% (or 0.10%, 0.50%, 1.00%, 1.50%, 2.00%, 2.50%, 3.00%) of second anti-glare particles, 1.39%-4.40% (or 1.50%, 2.10%, 2.50%, 3.00%, 3.50%, 3.90%, 4.20%) of third anti-glare particles, and 55.17%-70.30% (or 58.00%, 60.20%, 65.40%, 69.50%) of organic solvent, wherein the percentages are by weight.

[0034] Furthermore, the acrylate monomer is one of the following: pentaerythritol triacrylate (PETA) with trifunctional groups and bispentaerythritol hexaacrylate (DPHA) with hexafunctional groups.

[0035] Furthermore, the photoinitiator is one or more of conventional photoinitiators such as TPO, 1173, 183, and 907, or a combination thereof.

[0036] Furthermore, the anti-glare particles include a first anti-glare particle, a second anti-glare particle, and a third anti-glare particle.

[0037] Furthermore, the first, second, and third anti-glare particles are all inorganic particles.

[0038] Furthermore, the first anti-glare particle is a solid silica particle with an average particle size ranging from 4 to 6 μm, or 4.2 μm, 4.6 μm, 5.0 μm, 5.4 μm, or 5.8 μm.

[0039] Furthermore, the second anti-glare particle is a solid silica particle with an average particle size ranging from 2 to 3 μm, or 2.0 μm, 2.4 μm, 2.5 μm, 2.7 μm, or 2.9 μm.

[0040] Furthermore, the content of the second anti-glare particles is lower than or equal to the content of the first anti-glare particles. The average particle size of the second anti-glare particles is smaller than that of the first anti-glare particles, and the addition of the second anti-glare particles can effectively optimize the surface gloss of the anti-glare film.

[0041] Furthermore, the third anti-glare particle is a hollow microsphere-shaped nano-silica particle with a particle size of 10-50nm, preferably 20-30nm, or 15nm, 22nm, 25nm, 35nm, 40nm, or 45nm.

[0042] Furthermore, the porosity of the hollow microsphere-shaped third anti-glare particle—nano silica—is 45%-55%, or 47%, 49%, 50%, 52%, or 54%.

[0043] Furthermore, the anti-glare layer is formed by wet coating and light curing of the anti-glare coating liquid.

[0044] Furthermore, the anti-glare coating liquid can be applied using one of the following methods: roller coating, spray coating, or curtain coating.

[0045] Furthermore, the thickness of the anti-glare layer of the anti-glare film is 4-20 μm, or 5-12 μm, or 6 μm, 8 μm, 10 μm, 14 μm, 16 μm, 18 μm, etc.

[0046] Furthermore, the anti-glare coating is a UV-curable acrylate system.

[0047] Furthermore, the UV curing method can be implemented using mercury lamps or LED lamps.

[0048] Furthermore, the UV curing energy is 100-500 mJ / cm². 2 Or 150-480mJ / cm 2 Or 180mJ / cm 2 Or 250mJ / cm 2 Or 300mJ / cm 2 Or 450mJ / cm 2 .

[0049] Furthermore, the haze range of the anti-glare film is 75.08%-94.49%, or 77.20%-93.40%, or 80.00%, 82.10%, 85.00%, or 89.00%.

[0050] Furthermore, the transmittance of the anti-glare film ranges from 92.10% to 94.71%, or 93.00% to 94.50%, or 93.20%, 93.50%, and 93.70%.

[0051] Furthermore, the integrated black effect of the anti-glare film is tested using the L*a*b* color space of the anti-glare film, and characterized by L*. The L* value is 22.00-27.50, or 23.82-26.27, or 24.00, 24.50, 25.10, 25.60, 25.90.

[0052] The smaller the L* value, the darker the black; the larger the L* value, the brighter the black. The smaller the L* value, the better the overall black effect.

[0053] Furthermore, the gloss of the anti-glare film is 0.1-10, or 0.1-5.0, or 0.5, 1.0, 2.0, 3.0, 3.5, or 4.0.

[0054] This invention provides a method for preparing a high-fog anti-glare mold, the high-fog anti-glare mold comprising a substrate and an anti-glare layer, the preparation steps including:

[0055] Step 1), prepare the anti-glare coating.

[0056] An anti-glare layer is coated on a substrate. The coating solution for the anti-glare layer includes acrylic resin oligomers and anti-glare particles, wherein the anti-glare particles are solid micron particles and hollow nanoparticles.

[0057] Step 2), apply an anti-glare layer

[0058] An anti-glare coating is applied to a substrate, then baked and cured to prepare an anti-glare film.

[0059] The anti-glare layer of the anti-glare film has a thickness of 2-50 μm, and the transmittance of the anti-glare film is 91.00%-98.00%.

[0060] Furthermore, the substrate is preferably a substrate with high transmittance and low brightness (luminance L value in Lab color space).

[0061] Furthermore, the material of the substrate layer is selected from polyethylene terephthalate (PET), cellulose triacetate (TAC), polycarbonate (PC), or polymethyl methacrylate (PMMA).

[0062] Furthermore, the thickness of the substrate is preferably 50-250μm, or 80-220μm, or 100-200μm, or 120-180μm, or 140μm, or 150μm, or 160μm.

[0063] Furthermore, the anti-glare coating liquid includes acrylic resin oligomers, acrylate monomers, photoinitiators, leveling agents, anti-glare particles, and organic solvents.

[0064] Furthermore, the anti-glare coating liquid comprises the following components: 18.00%-30.00% acrylic resin oligomer, 4.00%-8.00% acrylate monomer, 0.90%-1.90% photoinitiator, 0.15%-0.40% leveling agent, 4.00%-10.00% anti-glare particles, and 60.00%-75.00% organic solvent, wherein the percentages are by weight.

[0065] Furthermore, the anti-glare coating liquid comprises the following components: 19.08%-27.06% (or 19.50%, 20.00%, 21.00%, 23.10%, 25.00%) of acrylic resin oligomer, 4.77%-6.77% (or 4.90%, 5.20%, 5.80%, 6.10%) of acrylate monomer, and 1.19%-1.69% (or 1.25%, 1.30%, 1.40%, 1. 50% to 1.60% of a photoinitiator, 0.24% to 0.34% (or 0.28% to 0.30%) of a leveling agent, 4.42% to 9.58% (or 5.10%, 6.00%, 7.10%, 8.00%, 9.10%) of anti-glare particles, and 55.17% to 70.30% (or 58.10%, 60.00%, 65.20%, 69.00%) of an organic solvent, wherein the percentages are by weight.

[0066] Furthermore, the acrylic resin oligomer is one or a combination of two of the following: a decafunctional polyurethane acrylic resin oligomer or a nonafunctional polyurethane acrylic resin oligomer.

[0067] Furthermore, the anti-glare coating liquid comprises the following components: 13.36%-18.94% (or 14.00%, 15.10%, 16.20%, 17.00%) of decafunctional polyurethane acrylic resin oligomer, 5.72%-8.12% (or 6.10%, 7.00%, 7.50%) of nonafunctional polyurethane acrylic resin oligomer, 4.77%-6.77% (or 4.90%, 5.20%, 5.80%, 6.50%) of trifunctional acrylate monomer, 0.48%-0.68% (or 0.50%, 0.55%, 0.60%) of photoinitiator TPO, 0.82%-1.01% (or 0.88%, 0.95%) of photoinitiator 1173, and 0.24%-0.34% of [unclear - possibly a specific ingredient or component]. The composition includes: a balancing agent (or 0.26%, 0.28%, 0.30%, 0.32%), 2.46%-3.48% (or 2.60%, 2.90%, 3.20%) of first anti-glare particles, 0.00%-3.42% (or 0.10%, 0.50%, 1.00%, 1.50%, 2.00%, 2.50%, 3.00%) of second anti-glare particles, 1.39%-4.40% (or 1.50%, 2.10%, 2.50%, 3.00%, 3.50%, 3.90%, 4.20%) of third anti-glare particles, and 55.17%-70.30% (or 58.00%, 60.20%, 65.40%, 69.50%) of organic solvent, wherein the percentages are by weight.

[0068] Furthermore, the acrylate monomer is one of the following: pentaerythritol triacrylate (PETA) with trifunctional groups and bispentaerythritol hexaacrylate (DPHA) with hexafunctional groups.

[0069] Furthermore, the photoinitiator is one or more of conventional photoinitiators such as TPO, 1173, 183, and 907, or a combination thereof.

[0070] Furthermore, the anti-glare particles include a first anti-glare particle, a second anti-glare particle, and a third anti-glare particle.

[0071] Furthermore, the first, second, and third anti-glare particles are all inorganic particles.

[0072] Furthermore, the first anti-glare particle is a solid silica particle with an average particle size ranging from 4 to 6 μm, or 4.2 μm, 4.6 μm, 5.0 μm, 5.4 μm, or 5.8 μm.

[0073] Furthermore, the second anti-glare particle is a solid silica particle with an average particle size ranging from 2-3 μm, or 2.0 μm, 2.4 μm, 2.5 μm, 2.7 μm, or 2.9 μm.

[0074] Furthermore, the content of the second anti-glare particles is lower than or equal to the content of the first anti-glare particles. The average particle size of the second anti-glare particles is smaller than that of the first anti-glare particles, and the addition of the second anti-glare particles can effectively optimize the surface gloss of the anti-glare film.

[0075] Furthermore, the third anti-glare particle is a hollow microsphere-shaped nano-silica particle with a particle size of 10-50nm, preferably 20-30nm, or 15nm, 22nm, 25nm, 35nm, 40nm, or 45nm.

[0076] Furthermore, the porosity of the hollow microsphere-type third anti-glare particle—nano silica—is 45%-55%, or 47%, 49%, 50%, 52%, or 54%.

[0077] Furthermore, the anti-glare layer is formed by wet coating and light curing of the anti-glare coating liquid.

[0078] Furthermore, the anti-glare coating liquid can be applied using one of the following methods: roller coating, spray coating, or curtain coating.

[0079] Furthermore, the thickness of the anti-glare layer of the anti-glare film is 4-20 μm, or 5-12 μm, or 6 μm, 8 μm, 10 μm, 14 μm, 16 μm, 18 μm, etc.

[0080] Furthermore, the anti-glare coating is a UV-curable acrylate system.

[0081] Furthermore, the curing is UV curing, which can be achieved using a mercury lamp or an LED lamp.

[0082] Furthermore, the UV curing energy is 100-500 mJ / cm². 2 Or 150-480mJ / cm 2 Or 180mJ / cm 2 Or 250mJ / cm 2 Or 300mJ / cm 2 Or 450mJ / cm 2 .

[0083] Furthermore, the haze range of the anti-glare film is 75.08%-94.49%, or 77.20%-93.40%, or 80.00%, 82.10%, 85.00%, or 89.00%.

[0084] Furthermore, the transmittance of the anti-glare film ranges from 92.10% to 94.71%, or 93.00% to 94.50%, or 93.20%, 93.50%, and 93.70%.

[0085] Furthermore, the integrated black effect of the anti-glare film is tested using the L*a*b* color space of the anti-glare film, and characterized by L*. The L* value is 22.00-27.50, or 23.82-26.27, or 24.00, 24.50, 25.10, 25.60, 25.90.

[0086] The smaller the L* value, the darker the black; the larger the L* value, the brighter the black. The smaller the L* value, the better the overall black effect.

[0087] Furthermore, the gloss of the anti-glare film is 0.1-10, or 0.1-5.0, or 0.5, 1.0, 2.0, 3.0, 3.5, or 4.0.

[0088] This invention also discloses the use of anti-glare particles in the preparation of high-fog anti-glare films. The anti-glare particles are solid micron particles and hollow nanoparticles. The high-fog anti-glare film includes a substrate and an anti-glare layer. The anti-glare layer is coated on the substrate. The coating liquid of the anti-glare layer includes acrylic resin oligomers and anti-glare particles. The thickness of the anti-glare layer of the anti-glare film is 2-50 μm, and the transmittance of the anti-glare film is 91.00%-98.00%.

[0089] The high-fog anti-glare film uses solid micron particles and hollow nanoparticles as anti-glare particles, which effectively improves the overall black effect of the anti-glare film, while its surface has a low surface reflectivity.

[0090] The anti-glare film has excellent high fog and high transmittance characteristics, extremely low surface gloss, and can effectively improve the overall black effect of the display screen to a certain extent. At the same time, the anti-glare film has good surface hardness and can be effectively used as a protective film for the display screen.

[0091] The anti-glare film provided by this invention has a haze range of 75.08%-94.49%, a total light transmittance range of 92.10%-94.71%, a surface gloss range of 0.1-4.0, a surface reflectance range of 4.05%-4.84%, and a brightness L* value of 23.82-26.27.

[0092] The anti-glare film provided by this invention has good light transmittance under high fog conditions, while also having low surface gloss and surface reflectivity, which can effectively improve the contrast of the displayed image.

[0093] The anti-glare film provided by this invention uses hollow microsphere nanoparticles as anti-glare particles, which can effectively improve the overall black effect (low L* value) of the display screen to a certain extent. At the same time, it achieves a low surface reflectivity without the need for anti-reflection treatment, that is, it achieves good anti-glare and anti-reflection performance in one step. Attached Figure Description

[0094] Figure 1 This is a schematic diagram of the structure of the high-fog anti-glare film provided by the present invention;

[0095] Illustration: 1-Substrate; 2-Anti-glare layer; 21-First anti-glare particle; 22-Second anti-glare particle; 23-Third anti-glare particle. Detailed Implementation

[0096] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0097] like Figure 1 As shown, the present invention provides a high-fog anti-glare film, including a substrate layer 1 and an anti-glare layer 2, wherein the anti-glare layer includes a first anti-glare particle 21, a second anti-glare particle 22 and a third anti-glare particle 23.

[0098] The raw materials used in this invention include the following:

[0099] Deca-functional polyurethane acrylic resin oligomer, DSM product M058.

[0100] Nine-component polyurethane acrylic resin oligomer, Sartoma's product CN-9013NS.

[0101] The tetrafunctional pentaerythritol tetraacrylate monomer, Sartoma's product SR-295NS.

[0102] Leveling agent, BYK-355, a product of BYK Chemical Company.

[0103] TPO photoinitiator, a product of BASF.

[0104] Photoinitiator 1173, a product of Merck.

[0105] The first anti-glare particle is silica particles, Grace's SY7000 product, with an average particle size of 4.6μm. The particle surface is treated with wax, which gives it high transparency, easy dispersibility, and a smooth surface.

[0106] The second anti-glare particle is silica particles, specifically Evonik's OK520 product, with an average particle size of 3μm and excellent transparency.

[0107] The third anti-glare particle is a nano-hollow silica particle, a product of Ningbo Particle Technology Co., Ltd., with an average particle size of 30nm.

[0108] Example 1

[0109] This invention provides a high-fog anti-glare film, comprising a substrate and an anti-glare layer. The anti-glare layer is formed by roller coating or spraying an anti-glare coating liquid, followed by UV curing. The anti-glare layer includes first anti-glare particles, second anti-glare particles, and third anti-glare particles, wherein the third anti-glare particles are nano-sized hollow silica particles. The preparation method of the high-fog anti-glare film is as follows.

[0110] 1. Preparation of anti-glare coating liquid

[0111] 18.94% of decafunctional polyurethane acrylate oligomer (DSM product), 8.12% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 6.77% of tetrafunctional acrylate monomer (Sartoma product), 0.34% of leveling agent (BYK product), 0.68% of photoinitiator TPO (BASF product), 1.01% of photoinitiator 1173 (Merck product), 3.48% of first anti-glare particles - silica particles (Grace, particle size 4-7μm), 1.74% of second anti-glare particles - silica particles (Evonik, particle size 3-6μm), 2.79% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 56.13% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0112] 2. Anti-glare coating

[0113] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0114] Example 2

[0115] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0116] 1. Preparation of anti-glare coating liquid

[0117] 18.62% of decafunctional polyurethane acrylate oligomer (DSM product), 7.99% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 6.65% of tetrafunctional acrylate monomer (Sartoma product), 0.33% of leveling agent (BYK product), 0.66% of photoinitiator TPO (BASF product), 1.00% of photoinitiator 1173 (Merck product), 3.42% of first anti-glare particles - silica particles (Grace, particle size 4-7μm), 3.42% of second anti-glare particles - silica particles (Evonik, particle size 3-6μm), 2.74% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 55.17% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0118] 2. Anti-glare coating

[0119] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0120] Example 3

[0121] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0122] 1. Preparation of anti-glare coating liquid

[0123] 17.54% of decafunctional polyurethane acrylate oligomer (DSM product), 7.52% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 6.26% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.31% of leveling agent (BYK product), 0.63% of photoinitiator TPO (BASF product), 0.94% of photoinitiator 1173 (Merck product), 3.23% of first anti-glare particles - silica particles (Grace company, particle size 4-7μm), 1.61% of second anti-glare particles - silica particles (Evonik company, particle size 3-6μm), 3.41% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 58.55% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0124] 2. Anti-glare coating

[0125] The anti-glare coating liquid was evenly applied to the PET substrate using methods such as roller coating, and then baked at 65℃ for 5 minutes. After the surface was dry, it was tested using 300mJ / cm². 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0126] Example 4

[0127] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0128] 1. Preparation of anti-glare coating liquid

[0129] 15.28% of decafunctional polyurethane acrylate oligomer (DSM product), 6.55% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 5.46% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.27% of leveling agent (BYK product), 0.55% of photoinitiator TPO (BASF product), 0.82% of photoinitiator 1173 (Merck product), 2.81% of first anti-glare particles - silica particles (Grace company, particle size 4-7μm), 1.41% of second anti-glare particles - silica particles (Evonik company, particle size 3-6μm), 4.40% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 62.45% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0130] 2. Anti-glare coating

[0131] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0132] Example 5

[0133] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0134] 1. Preparation of anti-glare coating liquid

[0135] 13.36% of decafunctional polyurethane acrylate oligomer (DSM product), 5.72% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 4.77% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.24% of leveling agent (BYK product), 0.48% of photoinitiator TPO (BASF product), 0.71% of photoinitiator 1173 (Merck product), 2.46% of primary anti-glare particles—silica particles (Grace, particle size 4-7μm), 1.96% of secondary anti-glare particles—nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 70.30% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0136] 2. Anti-glare coating

[0137] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied.2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0138] Example 6

[0139] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0140] 1. Preparation of anti-glare coating liquid

[0141] 18.94% of decafunctional polyurethane acrylate oligomer (DSM product), 8.12% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 6.77% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.34% of leveling agent (BYK product), 0.68% of photoinitiator TPO (BASF product), 1.01% of photoinitiator 1173 (Merck product), 3.48% of first anti-glare particles - silica particles (Grace company, particle size 4-7μm), 1.74% of second anti-glare particles - silica particles (Evonik company, particle size 3-6μm), 1.39% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 57.53% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0142] 2. Anti-glare coating

[0143] The anti-glare coating liquid was evenly applied to the PET substrate using methods such as roller coating, and then baked at 65℃ for 5 minutes. After the surface was dry, it was tested using 300mJ / cm². 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0144] Example 7

[0145] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0146] 1. Preparation of anti-glare coating liquid

[0147] 18.62% of decafunctional polyurethane acrylate oligomer (DSM product), 7.99% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 6.65% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.33% of leveling agent (BYK product), 0.66% of photoinitiator TPO (BASF product), 1.00% of photoinitiator 1173 (Merck product), 3.42% of first anti-glare particles - silica particles (Grace company, particle size 4-7μm), 3.42% of second anti-glare particles - silica particles (Evonik company, particle size 3-6μm), 2.74% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 55.17% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0148] 2. Anti-glare coating

[0149] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the film, resulting in a high-fog anti-glare film with a dry film thickness of 12μm.

[0150] Comparative Example 1

[0151] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0152] 1. Preparation of anti-glare coating liquid

[0153] 24.72% of decafunctional polyurethane acrylate oligomer (DSM product), 10.59% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 8.83% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.44% of leveling agent (BYK product), 0.88% of photoinitiator TPO (BASF product), 1.32% of photoinitiator 1173 (Merck product), 1.82% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 51.40% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0154] 2. Anti-glare coating

[0155] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0156] The anti-glare film contains only the third type of anti-glare particles – nano-hollow silica particles with a particle size of 30 nm.

[0157] Comparative Example 2

[0158] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0159] 1. Preparation of anti-glare coating liquid

[0160] 22.65% of decafunctional polyurethane acrylate oligomer (DSM product), 9.72% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 8.09% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.40% of leveling agent (BYK product), 0.81% of photoinitiator TPO (BASF product), 1.21% of photoinitiator 1173 (Merck product), 3.33% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 53.79% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0161] 2. Anti-glare coating

[0162] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0163] The anti-glare film contains only the third type of anti-glare particles – nano-hollow silica particles with a particle size of 30 nm.

[0164] Comparative Example 3

[0165] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0166] 1. Preparation of anti-glare coating liquid

[0167] 20.91% of decafunctional polyurethane acrylate oligomer (DSM product), 8.96% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 7.47% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.37% of leveling agent (BYK product), 0.75% of photoinitiator TPO (BASF product), 1.12% of photoinitiator 1173 (Merck product), 4.62% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 30nm), and 55.80% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0168] 2. Anti-glare coating

[0169] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0170] The anti-glare film contains only the third type of anti-glare particles – nano-hollow silica particles with a particle size of 30 nm.

[0171] Comparative Example 4

[0172] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0173] 1. Preparation of anti-glare coating liquid

[0174] 20.91% of decafunctional polyurethane acrylate oligomer (DSM product), 8.96% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 7.47% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.37% of leveling agent (BYK product), 0.75% of photoinitiator TPO (BASF product), 1.12% of photoinitiator 1173 (Merck product), 4.62% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 80nm), and 55.80% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0175] 2. Anti-glare coating

[0176] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0177] The anti-glare film contains only the third type of anti-glare particles—nano hollow silica particles with a particle size of 80 nm.

[0178] Comparative Example 5

[0179] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0180] 1. Preparation of anti-glare coating liquid

[0181] 20.91% of decafunctional polyurethane acrylate oligomer (DSM product), 8.96% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 7.47% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.37% of leveling agent (BYK product), 0.75% of photoinitiator TPO (BASF product), 1.12% of photoinitiator 1173 (Merck product), 4.62% of third anti-glare particles - nano hollow silica particles (Ningbo Portion Technology, particle size 120nm), and 55.80% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0182] 2. Anti-glare coating

[0183] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0184] The anti-glare film contains only the third type of anti-glare particles—nano hollow silica particles with a particle size of 120 nm.

[0185] Comparative Example 6

[0186] The high-fog anti-glare film provided in Example 1, and the method for preparing the high-fog anti-glare film.

[0187] 1. Preparation of anti-glare coating liquid

[0188] 27.18% of decafunctional polyurethane acrylate oligomer (DSM product), 11.65% of nonafunctional polyurethane acrylate oligomer (Sartoma product), 9.71% of tetrafunctional acrylate monomer PETA (Sartoma product), 0.49% of leveling agent (BYK product), 0.97% of photoinitiator TPO (BASF product), 1.46% of photoinitiator 1173 (Merck product), and 48.54% of organic solvent ethyl acetate were thoroughly stirred and mixed to obtain an anti-glare coating liquid.

[0189] 2. Anti-glare coating

[0190] The anti-glare coating liquid was evenly applied to the PET substrate by roller coating, baked at 65℃ for 5 minutes, and allowed to dry on the surface. Then, a 300mJ / cm² solution was applied. 2 The UV energy is applied to cure the anti-glare layer, resulting in a high-fog anti-glare film with a dry film thickness of 6μm.

[0191] This anti-glare film contains no anti-glare particles.

[0192] The formulations of the anti-glare coating liquids for the anti-glare films provided in the embodiments and comparative examples of the present invention are shown in Tables 1-1 and 1-2.

[0193] Table 1-1 Formulations of the anti-glare coating liquid for the anti-glare films provided in Examples 1-7

[0194]

[0195]

[0196] Table 1-2 shows the formulations of the anti-glare coatings for the anti-glare films provided in Comparative Examples 1-6.

[0197]

[0198] The main performance of the anti-glare film provided in the embodiments and comparative examples of the present invention was tested using the following test methods.

[0199] (1) Transmittance / Haze: The total light transmittance and haze of each anti-glare film were measured using an NDH7000 haze meter manufactured by Nippon Denshoku.

[0200] (2) Gloss: The gloss of the surface of each anti-glare film at 60° was measured using a Kossler gloss meter.

[0201] (3) Reflectance: The surface reflectance of each anti-glare film was measured using a Konica Minolta colorimeter (CM-3600a). The test method is as follows: the anti-glare film was attached to an orthogonal polarizer, and its surface reflectance was measured using the reflection mode. The lower the reflectance, the better.

[0202] (4) Surface L* value: The surface L* value of each anti-glare film was measured using a Konica Minolta colorimeter (CM-3600a). The test method is as follows: the anti-glare film is attached to the cross polarizer and its surface L* value is measured using the reflection mode. The lower the L* value, the better the overall black effect of the display screen after using its anti-glare film.

[0203] (5) Coating thickness: The surface coating thickness of each anti-glare film was measured using a micrometer screw gauge.

[0204] (6) Hardness: The pencil hardness of each anti-glare film was measured using a pencil hardness tester under a 500g load. The pencils used were products of Mitsubishi Corporation.

[0205] (7) Anti-glare performance: This invention mainly uses a point light source to illuminate the anti-glare film at 60° and observes the degree of scattering of the light shadow at the center of the point light source. The greater the degree of scattering of the light shadow, the better the anti-glare performance. The specific evaluation criteria for its anti-glare performance are as follows:

[0206] If the light shadow is completely invisible, the anti-glare performance is rated as "Excellent".

[0207] If the light shadow is only slightly visible, the anti-glare performance is rated as "good".

[0208] If the light shadow is clearly visible, then it has virtually no anti-glare performance and is rated as "poor".

[0209] Table 2. Performance test results of the anti-glare films provided in Examples 1-7 and Comparative Examples 1-6

[0210]

[0211]

[0212] Table 3. Differences in basic parameters of the anti-glare films provided in Examples 1-7 and Comparative Examples 1-6

[0213]

[0214] Based on the test results of the above embodiments and comparative examples, it can be concluded that the anti-glare film provided by the present invention has good compatibility with high fog and high transmittance characteristics, while having low surface gloss and surface reflectivity, and the low L* value can improve the overall black effect of the display screen to a certain extent.

[0215] The anti-glare film provided by this invention uses nano-sized hollow silica particles as anti-glare particles, which effectively reduces the surface brightness L of the anti-glare film to a certain extent. Furthermore, by selecting an appropriate particle size for the nano-hollow particles, the surface reflectivity is also effectively reduced.

[0216] The anti-glare film provided by this invention has a haze range of 75.08%-94.49%, a total light transmittance range of 92.10%-94.71%, a surface gloss range of 0.1-4.0, a surface reflectance range of 4.05%-4.84%, a brightness L value of 23.82-26.27, and a surface hardness of about 3H.

[0217] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. All equivalent variations and modifications made based on the content of the present invention are covered within the patent scope of the present invention.

Claims

1. An anti-glare film, comprising a substrate layer and an anti-glare layer coated on the substrate, The coating of the anti-glare layer comprises 13.36%-18.94% of decafunctional polyurethane acrylate oligomer, 5.72%-8.12% of nonafunctional polyurethane acrylate oligomer, 4.77%-6.77% of trifunctional acrylate monomer and anti-glare particles, wherein the percentage content is by weight percentage. The thickness of the anti-glare layer of the anti-glare film is 5-12 μm; The anti-glare particles are composed of a first anti-glare particle, a second anti-glare particle, and a third anti-glare particle; The first, second, and third anti-glare particles are all inorganic particles; The first anti-glare particle is a solid silica particle with an average particle size ranging from 4.6 to 6 μm; The second anti-glare particles are solid silica particles with an average particle size range of 2-3 μm; The content of the second anti-glare particles is lower than or equal to the content of the first anti-glare particles; The third anti-glare particle is a hollow microsphere-shaped nano-silica particle with an average particle size of 20-30 nm. The hollow microsphere-type third anti-glare particle - nano silica has a porosity of 45%-55%; The first anti-glare particle has a weight percentage of 2.60%-3.48%, the second anti-glare particle has a weight percentage of 1.00%-3.42%, and the third anti-glare particle has a weight percentage of 1.39%-4.40%. The anti-glare film has a haze range of 75.08%-94.49%, a transmittance range of 92.10%-94.71%, a surface gloss range of 0.1-3.5, a surface reflectance range of 4.05%-4.84%, and a luminance L* value of 23.82-26.

27.

2. The anti-glare film according to claim 1, characterized in that, The material of the substrate layer is selected from polyethylene terephthalate, cellulose triacetate, polycarbonate or polymethyl methacrylate.

3. The anti-glare film according to claim 1, characterized in that, The thickness of the substrate is 50-250 μm.

4. The anti-glare film according to claim 1, characterized in that, Anti-glare coatings also include photoinitiators, leveling agents, and organic solvents.

5. The anti-glare film according to claim 4, characterized in that, The anti-glare coating contains the following components: 0.90%-1.69% photoinitiator, 0.15%-0.40% leveling agent, and 60.00%-75.00% organic solvent.

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