CN119126270A - Anti-glare low reflection film - Google Patents
Anti-glare low reflection film Download PDFInfo
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- CN119126270A CN119126270A CN202411521849.3A CN202411521849A CN119126270A CN 119126270 A CN119126270 A CN 119126270A CN 202411521849 A CN202411521849 A CN 202411521849A CN 119126270 A CN119126270 A CN 119126270A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
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Abstract
The application discloses an anti-dazzle low-reflection film which comprises a laminated substrate layer, a high-refractive index pre-coating layer, a high-refractive index anti-dazzle coating layer and a low-refractive index coating layer, wherein the refractive index of the high-refractive index pre-coating layer and the refractive index of the high-refractive index anti-dazzle coating layer are larger than that of the substrate layer, the refractive index of the substrate layer is larger than that of the low-refractive index coating layer, coating liquid of the high-refractive index anti-dazzle coating layer comprises outer anti-dazzle particles and inner anti-dazzle high-refractive particles, the outer anti-dazzle particles are arranged on one surface of the high-refractive index anti-dazzle coating layer, which is far away from the substrate layer, so that an outer anti-dazzle surface is formed on the outer surface of the low-refractive index coating layer, and the inner anti-dazzle high-refractive index particles are distributed inside the high-refractive index anti-dazzle coating layer. The anti-dazzle coating with high refractive index is directly arranged on the surface of the pre-coating, the anti-dazzle coating and the low refractive index coating are matched to form an anti-reflection structure, the reflectivity of the film is effectively reduced, the outer anti-dazzle particles can be protruded to keep high outer haze, the inner anti-dazzle high-refraction particles can improve the refractive index of the anti-dazzle coating, the inner haze is provided, and the anti-dazzle effect of the film is effectively ensured.
Description
Technical Field
The application belongs to the technical field of optical films, and particularly relates to an anti-dazzle low-reflection film.
Background
Modern displays and devices are often used in a variety of lighting conditions, including intense natural or artificial light. The anti-dazzle low reflection film can effectively reduce reflected light and scattered light on the surface of a screen, so that display content is clearer, colors are more vivid, and contrast ratio is higher, thereby providing more vivid and real visual experience and relieving visual fatigue of a user.
At present, in order to ensure the adhesive force of a coating, the surface of a PET substrate is usually provided with a low-refractive index precoat (Primer), the refractive index of the precoat of the PET substrate is 1.5-1.55, and in order to match the refractive index of the precoat, the bad phenomena such as rainbow lines and the like are avoided, so that a hardened coating with the refractive index of 1.5-1.55 can only be coated above the precoat, meanwhile, in order to reduce the reflectivity of the film, a nano-level high-refractive coating is required to be added, and finally, a nano-level low-reflective coating is required to be coated above the hardened coating, so that the wet low-reflective film consisting of the substrate precoat, the high-hard coating, the high-refractive coating and the low-reflective layer is formed.
The wet low reflection film technology needs to achieve the optimal anti-reflection effect within a certain thickness range, and the stability of the thickness of the coating layer can also influence the consistency and stability of the product, the wet low reflection film with the structure is difficult to control the thickness of each layer for wet coating, the high refractive coating and the low reflective coating are both nano-scale thicknesses, the uneven thickness easily causes the rise of the reflectivity of the film, the required coating thickness is difficult to control under the actual process condition, and the problems of larger reflectivity, poor uniformity of chromatic aberration in the TD direction and the like are caused.
Disclosure of Invention
The application aims to provide an anti-dazzle low-reflection film, which solves the technical problems that the thickness of each layer of the anti-dazzle low-reflection film in the prior art is difficult to control, the reflectivity is high, and the use requirement is difficult to meet in a specific scene.
In order to achieve the above object, the present application provides an antiglare low reflection film comprising a base material layer, a high refractive index precoat layer, a high refractive index antiglare coating layer and a low refractive index coating layer which are laminated in this order;
The absolute value of the difference between the refractive indexes of the high-refractive-index pre-coating layer and the high-refractive-index anti-dazzle coating layer is 0-0.02, the refractive indexes of the high-refractive-index pre-coating layer and the high-refractive-index anti-dazzle coating layer are larger than those of the substrate layer, and the refractive index of the substrate layer is larger than that of the low-refractive-index coating layer;
the coating liquid of the high refractive index anti-dazzle coating comprises outer anti-dazzle particles and inner anti-dazzle high-refraction particles, wherein the outer anti-dazzle particles protrude out of one surface of the high refractive index anti-dazzle coating, which is away from the substrate layer, so that the outer surface of the low refractive index coating forms an uneven outer anti-dazzle surface, the inner anti-dazzle high-refraction particles are distributed inside the high refractive index anti-dazzle coating, and the weight ratio of the outer anti-dazzle particles to the inner anti-dazzle high-refraction particles is (7-9) to (1-3).
In one or more embodiments, the refractive index of the high refractive index pre-coating layer and the high refractive index anti-dazzle coating layer is 1.63-1.68, the refractive index of the low refractive index coating layer is 1.33-1.4, and the refractive index of the substrate layer is 1.47-1.55.
In one or more embodiments, the antiglare low reflection film has a total haze A that satisfies the formula A.gtoreq.85% B, where B is the total haze of the antiglare low reflection film after removal of the low refractive index coating.
In one or more embodiments, the thickness of the high refractive index precoating layer is 30-60 nm, and the coating liquid of the high refractive index precoating layer comprises the following components in parts by weight:
20-30 parts of hydrolyzed polymer, 20-30 parts of waterborne polyurethane, 5-10 parts of photoinitiator, 10-20 parts of wetting agent and 10-35 parts of organic solvent.
In one or more embodiments, the hydrolyzed polymer comprises a methacryloxy silane hydrolyzed polymer and the aqueous polyurethane comprises an aqueous polyurethane.
In one or more embodiments, the thickness of the high refractive index anti-dazzle coating is 4-6 μm, and the coating liquid of the high refractive index anti-dazzle coating comprises the following components in parts by weight:
30-40 parts of epoxy acrylic resin, 5-10 parts of outer anti-dazzle particles, 1-5 parts of inner anti-dazzle high-refraction particles, 5-10 parts of photoinitiator, 5-10 parts of flatting agent and 25-40 parts of organic solvent.
In one or more embodiments, the epoxy acrylic resin has a functionality of 5 to 10.
In one or more embodiments, the outer antiglare particles are silica particles having a particle diameter of 3 to 4 μm, the inner antiglare high refractive index particles are one or a combination of two of alumina particles and zirconia particles, and the particle diameters of the alumina particles and the zirconia particles are 100 to 300nm.
In one or more embodiments, the thickness of the low refractive index coating is 95-105 nm, and the coating liquid of the low refractive index coating comprises the following components in parts by weight:
20-30 parts of fluorine-containing multifunctional (methyl) acrylic resin, 10-20 parts of polyfunctional acrylate monomer, 5-10 parts of photoinitiator, 10-15 parts of hollow silica particles, 5-10 parts of flatting agent and 25-45 parts of organic solvent.
In one or more embodiments, the high refractive index pre-coat layer and the high refractive index antiglare coating layer are applied by a gravure coating method
Compared with the prior art, the application has the beneficial effects that:
According to the anti-dazzle low-reflection film, the high-refractive-index precoating layer is arranged on the surface of the substrate layer, and the high-refractive-index anti-dazzle coating can be directly arranged on the surface of the precoating layer, so that the anti-dazzle coating and the low-refractive-index coating can be matched to form an anti-reflection structure, the reflectivity of the film is effectively reduced, the reflectivity is less than 1.5%, and the requirements of specific scenes can be met;
The anti-dazzle low-reflection film only has the low-reflectivity coating with the nano-scale thickness, so that the process difficulty of wet coating is effectively reduced, the stability of the thickness of each layer in the wet coating process is improved, and the consistency and stability of products are ensured;
The high refractive index anti-dazzle coating of the anti-dazzle low-reflection film comprises outer anti-dazzle particles and inner anti-dazzle high-refraction particles, wherein the outer anti-dazzle particles can protrude out of the surface of the high refractive index anti-dazzle coating, so that an uneven outer anti-dazzle surface is formed on the outer side of the low-reflectivity coating, high outer haze can be still kept after the low-reflectivity coating is coated, the refractive index of the anti-dazzle coating is improved by the inner anti-dazzle high-refraction particles, on the other hand, the inner haze is provided, and the anti-dazzle effect of the film is effectively ensured by adjusting the proportion of the outer anti-dazzle particles to the inner anti-dazzle high-refraction particles.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic structural view of an embodiment of the antiglare low reflection film of the present application;
Fig. 2 is an SEM image of the surface of the antiglare coating with high refractive index and the surface of the antiglare low reflection film of example 1.
The figure shows:
a substrate layer 100;
A high refractive index precoat layer 200;
High refractive index antiglare coating 300, outer antiglare particles 301, inner antiglare high refractive index particles 302;
Low refractive index coating 400.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
The anti-dazzle low reflection film technology meets the high requirements of modern display equipment on visual definition and comfort by improving the optical performance and use experience of a screen. However, the reflectivity of the conventional anti-dazzle low-reflection film is generally higher than 2%, so that the requirements of specific scenes are difficult to meet.
In order to solve the problems, the applicant has developed a novel anti-dazzle low-reflection film which can further reduce the reflectivity to below 1.5% while ensuring the anti-dazzle effect, thereby meeting the requirements of specific scenes.
Specifically, referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an antiglare low reflection film according to the present application.
As shown in fig. 1, the film includes a base material layer 100, a high refractive index pre-coating layer 200, a high refractive index antiglare coating layer 300, and a low refractive index coating layer 400, which are sequentially stacked.
In order to ensure the refractive index matching of the layers of the film and avoid the rainbow phenomenon caused by the refractive index mismatch, the absolute value of the difference between the refractive indexes of the high refractive index pre-coating layer 200 and the high refractive index anti-dazzle coating layer 300 is 0-0.02, and the refractive indexes of the high refractive index pre-coating layer 200 and the high refractive index anti-dazzle coating layer 300 are larger than those of the substrate layer 100.
To ensure a low reflection effect, the refractive index of the substrate layer 100 is greater than that of the low refractive index coating 400, thereby forming a high-low refractive composite anti-reflection structure.
In one embodiment, the refractive index of the high refractive index pre-coating layer 200 and the high refractive index antiglare coating layer 300 may be 1.63 to 1.68, the refractive index of the base material layer 100 may be 1.47 to 1.55, and the refractive index of the low refractive index coating layer 400 may be 1.33 to 1.4.
In order to achieve a good antiglare effect of a film after the low refractive index antiglare coating 400 is coated on the high refractive index antiglare coating 300, the coating liquid of the high refractive index antiglare coating 300 comprises outer antiglare particles 301 and inner antiglare high refractive index particles 302, the outer antiglare particles 301 protrude out of one surface of the high refractive index antiglare coating 300 facing away from the substrate layer 100, so that the outer surface of the low refractive index coating 400 forms an uneven outer antiglare surface, the inner antiglare high refractive index particles 302 are distributed inside the high refractive index antiglare coating 300, and the weight ratio of the outer antiglare particles 301 to the inner antiglare high refractive index particles 302 is (7-9): (1-3).
Based on the above design, after the low refractive index coating 400 is coated, the rugged outer anti-dazzle surface can be provided, the outer haze is effectively increased, after the low refractive index coating 400 is coated, the total haze loss of the film is lower than 15%, meanwhile, the inner haze can be ensured by the inner anti-dazzle high-refraction particles 302 dispersed inside the high refractive index anti-dazzle coating 300, the refractive index of the high refractive index anti-dazzle coating 300 is adjusted, the film can be ensured to have proper outer haze and inner haze by adjusting the weight ratio of the outer anti-dazzle particles 301 to the inner anti-dazzle high-refraction particles 302, and accordingly the anti-dazzle effect of the film is ensured while the low anti-dazzle effect is ensured.
The materials of the layers of the antiglare low reflection film are described in detail below.
Specifically, the substrate layer 100 may be a TAC substrate layer 100, the thickness of which may be adjusted based on actual requirements, and preferably the total light transmittance of the TAC substrate layer 100 is greater than 90%, and exemplary, the thickness of the TAC substrate layer 100 may be 60 μm or 80 μm.
In one embodiment, the high refractive index pre-coating layer 200 may have a thickness of 30-60 nm, and the coating liquid of the high refractive index pre-coating layer 200 may comprise, by weight, 20-30 parts of a hydrolyzed polymer, 20-30 parts of aqueous polyurethane, 5-10 parts of a photoinitiator, 10-20 parts of a wetting agent, and 10-35 parts of an organic solvent.
Wherein the hydrolyzed polymer can be methacryloxy silane hydrolyzed polymer, the aqueous polyurethane can be aqueous polyurethane, the photoinitiator can be benzophenone, the wetting agent can be dodecyl dimethyl ammonium chloride, and the organic solvent can be butanone, propylene glycol methyl ether, methyl isobutyl ketone, isopropanol, ethyl acetate, etc.
Because the TAC substrate has a low surface tension, its surface is less likely to interact with the aqueous coating. In order to improve the coating property, the present application adjusts the surface tension by adding a hydrolyzed polymer to the high refractive index pre-coat layer 200, so that the coating material is more easily wetted and covers the surface of the TAC substrate layer 100. During coating, the water and solvent in the high refractive index precoat layer 200 may adsorb to the TAC substrate surface and diffuse into the TAC substrate. In this way, the resin, filler and other additives in the coating can contact with the TAC substrate and form physical adsorption or chemical bonding with the surface of the TAC substrate, so that good adhesion is realized. After coating, the moisture or other solvents in the high refractive index pre-coat layer 200 gradually volatilize, allowing the resin or polymer to form a solid film and bond with the TAC substrate. During the drying and curing process, the interaction between the coating and the TAC substrate can be further enhanced, and the stability and the adhesive force of the coating are ensured.
In one embodiment, the thickness of the high refractive index anti-dazzle coating 300 may be 4-6 μm, and the coating liquid of the high refractive index anti-dazzle coating 300 may include the following components in parts by weight:
30-40 parts of epoxy acrylic resin, 5-10 parts of outer anti-dazzle particles 301, 1-5 parts of inner anti-dazzle high-refraction particles 3021-10 parts of photoinitiator, 5-10 parts of flatting agent and 25-40 parts of organic solvent.
The functionality of the epoxy acrylic resin can be 5-10, so that the hardness and wear resistance of the coating are improved, the photoinitiator can be benzophenone, the leveling agent can be polyether modified silane, and the organic solvent can be butanone, propylene glycol methyl ether, methyl isobutyl ketone, isopropanol, ethyl acetate and the like.
In one embodiment, the thickness of the low refractive index coating 400 may be 95-105 nm, and the low refractive index coating 400 may include the following components in parts by weight:
20-30 parts of fluorine-containing multifunctional (methyl) acrylic resin, 10-20 parts of polyfunctional acrylate monomer, 5-10 parts of photoinitiator, 10-15 parts of hollow silica particles, 5-10 parts of flatting agent and 25-45 parts of organic solvent.
In one embodiment, the hollow silica particles may have a particle size of 30 to 60nm.
In one embodiment, the high refractive index pre-coating layer 200 and the high refractive index antiglare coating layer 300 may be coated using a micro gravure coating method.
In order to ensure that the outer antiglare particles 301 can protrude from the outer surface of the high refractive index antiglare coating 300, the inner antiglare high refractive index particles 302 can be dispersed inside the high refractive index antiglare coating 300, and in one embodiment, the outer antiglare particles 301 can be silica particles having a particle diameter of 3 to 4 μm, and the inner antiglare high refractive index particles 302 can be one or a combination of two of alumina particles and zirconia particles having a particle diameter of 100 to 300nm.
Because the silica particles can be dispersed on the surface of the high refractive index antiglare coating 300, the protruding size thereof is in the micrometer scale, while the thickness of the low refractive index coating 400 is in the nanometer scale, which is insufficient to fill the depressions between the silica particles, thereby ensuring that the final finished product still has a certain external haze, and ensuring the antiglare performance of the film.
In addition, since the particle sizes of the alumina and zirconia are nano-sized and the thickness of the high refractive index antiglare coating 300 is 3 to 4 μm, the two types of high refractive particles are generally encapsulated in the coating, thus providing the internal haze of the antiglare coating.
In addition, the ratio of addition of the outer antiglare particles 301 and the inner antiglare high refractive index particles 302 has a great influence on the antiglare effect of the final film. In general, in order to secure antiglare performance of a film, it is necessary to increase the external haze of the film as much as possible, but in order to increase the refractive index and hardness of the antiglare film, it is also necessary to match the internal haze in a certain proportion. The application ensures that the external haze and the internal haze of the final film are in reasonable proportion by controlling the proportion of the external haze and the internal haze of the final film, and ensures the anti-dazzle performance of the final film.
The following describes the advantageous effects of the technical scheme of the present application in further detail with reference to specific examples.
Example 1:
An anti-dazzle low-reflection film comprises a substrate layer, a high-refractive index precoating layer, a high-refractive index anti-dazzle coating and a low-refractive index coating which are sequentially laminated;
wherein the substrate layer is a 60 μmTAC substrate;
The thickness of the high refractive index precoat layer is 30nm, and the coating liquid comprises 30 parts of methacryloxy silane hydrolyzed polymer, 30 parts of water-based polyurethane, 5 parts of benzophenone photoinitiator, 10 parts of dodecyl dimethyl ammonium chloride wetting agent, 15 parts of butanone and 10 parts of propylene glycol methyl ether;
The high refractive index anti-dazzle coating has a thickness of 4 mu m, and the coating liquid comprises, by weight, 30 parts of epoxy acrylic resin with a functionality of 7, 8 parts of silica particles with a particle size of 3 mu m, 2 parts of alumina particles with a particle size of 150nm, 5 parts of a benzophenone photoinitiator, 5 parts of a polyether modified silane leveling agent, 20 parts of butanone and 30 parts of propylene glycol methyl ether;
The coating liquid comprises 20 parts of fluorine-containing multifunctional (methyl) acrylic resin, 15 parts of multifunctional acrylic ester monomer, 5 parts of benzophenone photoinitiator, 10 parts of hollow silica particles, 5 parts of polyether modified silane flatting agent and 45 parts of methyl isobutyl ketone.
Example 2:
An anti-dazzle low-reflection film comprises a substrate layer, a high-refractive index precoating layer, a high-refractive index anti-dazzle coating and a low-refractive index coating which are sequentially laminated;
Wherein the substrate layer is an 80 mu mTAC substrate;
the thickness of the high refractive index precoat layer is 50nm, and the coating liquid comprises the following components, by weight, 25 parts of methacryloxy silane hydrolyzed polymer, 25 parts of waterborne polyurethane, 5 parts of benzophenone photoinitiator, 10 parts of dodecyl dimethyl ammonium chloride wetting agent, 25 parts of butanone and 10 parts of propylene glycol methyl ether;
The high refractive index anti-dazzle coating has a thickness of 5 mu m, and the coating liquid comprises, by weight, 30 parts of epoxy acrylic resin with a functionality of 10, 9 parts of silica particles with a particle size of 3.5 mu m,1 part of zirconia particles with a particle size of 200nm, 5 parts of benzophenone photoinitiator, 5 parts of polyether modified silane leveling agent, 20 parts of butanone and 10 parts of propylene glycol methyl ether;
The coating liquid comprises, by weight, 25 parts of fluorine-containing multifunctional (methyl) acrylic resin, 15 parts of multifunctional acrylate monomer, 5 parts of benzophenone photoinitiator, 15 parts of hollow silica particles, 5 parts of polyether modified silane leveling agent and 35 parts of methyl isobutyl ketone.
Example 3:
An anti-dazzle low-reflection film comprises a substrate layer, a high-refractive index precoating layer, a high-refractive index anti-dazzle coating and a low-refractive index coating which are sequentially laminated;
Wherein the substrate layer is an 80 mu mTAC substrate;
the thickness of the high refractive index precoat layer is 60nm, and the coating liquid comprises the following components, by weight, 20 parts of methacryloxy silane hydrolyzed polymer, 20 parts of waterborne polyurethane, 10 parts of benzophenone photoinitiator, 20 parts of dodecyl dimethyl ammonium chloride wetting agent, 5 parts of butanone and 5 parts of propylene glycol methyl ether;
the high refractive index anti-dazzle coating has a thickness of 6 mu m, and the coating liquid comprises 40 parts of epoxy acrylic resin with a functionality of 10, 7 parts of silicon dioxide particles with a particle size of 3.5 mu m, 3 parts of zirconia particles with a particle size of 200nm, 10 parts of benzophenone photoinitiator, 10 parts of polyether modified silane leveling agent, 15 parts of butanone and 10 parts of propylene glycol methyl ether;
the coating liquid comprises, by weight, 30 parts of fluorine-containing multifunctional (methyl) acrylic resin, 20 parts of multifunctional acrylate monomer, 10 parts of benzophenone photoinitiator, 10 parts of hollow silica particles, 10 parts of polyether modified silane leveling agent and 25 parts of methyl isobutyl ketone.
Comparative example 1:
An anti-dazzle low-reflection film comprises a substrate layer, an anti-dazzle coating and a low-refractive index coating which are sequentially laminated;
Wherein the substrate layer is an 80 mu mTAC substrate;
The thickness of the anti-dazzle coating is 4 mu m, and the coating liquid comprises the following components, by weight, 30 parts of epoxy acrylic resin with the functionality of 10, 10 parts of silicon dioxide particles with the particle size of 4 mu m, 5 parts of benzophenone photoinitiator, 5 parts of polyether modified silane leveling agent, 10 parts of butanone and 30 parts of propylene glycol methyl ether;
The coating liquid comprises 20 parts of fluorine-containing multifunctional (methyl) acrylic resin, 15 parts of multifunctional acrylic ester monomer, 5 parts of benzophenone photoinitiator, 10 parts of hollow silica particles, 5 parts of polyether modified silane flatting agent and 45 parts of methyl isobutyl ketone.
Effect example 1:
Characterization analysis was performed on the surface of the antiglare coating with high refractive index and the surface of the antiglare low reflection film of example 1, respectively, to obtain fig. 2.
Referring to fig. 2, fig. 2 is an SEM image of the surface of the antiglare coating with high refractive index and the surface of the antiglare low reflection film of example 1, a is a surface topography of the antiglare coating with high refractive index, and b is a surface topography of the antiglare low reflection film.
As shown in fig. 2a, when the low refractive index coating layer is not coated, a large number of protrusion structures, which are silica particles protruding from the surface, exist on the surface of the high refractive index antiglare coating layer, and as shown in fig. 2b, after the low refractive index coating layer is coated, a large number of protrusion structures are still visible, indicating that the low refractive index coating layer fails to fill up the depressions between the silica particles, thereby improving the external haze and antiglare property of the film.
Effect example 2:
The reflectance, total haze, external haze, and internal haze of the films of examples 1,2 and comparative example 1 were measured using a haze meter and a reflectance meter, respectively, while the external haze, internal haze, and total haze of the high refractive index antiglare coating of example 1 were measured, to obtain the following table data:
| Group of | Reflectivity of | External haze | Internal haze | Total haze |
| Example 1 | 1.39% | 8.26% | 2.06% | 10.32% |
| Example 2 | 1.26% | 13.12% | 1.46% | 14.58% |
| Comparative example 1 | 2.65% | 12.67% | 0.16% | 12.83% |
As described above, the reflectance of the films of examples 1 and 2 was less than 1.5%, wherein the reflectance of example 2 was 1.26%, and the reflectance of the conventional antiglare low-reflection film of comparative example 1 was 2.65%, mainly because the antiglare coating of comparative example 1 lacks internal antiglare high-refractive particles, and the antiglare coating and the low-refractive-index coating were difficult to cooperate to form a low-reflection structure, affecting the reflectance of the film.
The total haze of examples 1 and 2 was 10% or more, while the external haze and the internal haze were high, the ratio was proper, and the antiglare effect was ensured, while the total haze of comparative example 1 was 12.83%, but the internal haze was too low, and the overall antiglare effect was imaged.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. An anti-dazzle low-reflection film is characterized by comprising a substrate layer, a high-refractive index precoating layer, a high-refractive index anti-dazzle coating and a low-refractive index coating which are sequentially laminated;
The absolute value of the difference between the refractive indexes of the high-refractive-index pre-coating layer and the high-refractive-index anti-dazzle coating layer is 0-0.02, the refractive indexes of the high-refractive-index pre-coating layer and the high-refractive-index anti-dazzle coating layer are larger than those of the substrate layer, and the refractive index of the substrate layer is larger than that of the low-refractive-index coating layer;
the coating liquid of the high refractive index anti-dazzle coating comprises outer anti-dazzle particles and inner anti-dazzle high-refraction particles, wherein the outer anti-dazzle particles protrude out of one surface of the high refractive index anti-dazzle coating, which is away from the substrate layer, so that the outer surface of the low refractive index coating forms an uneven outer anti-dazzle surface, the inner anti-dazzle high-refraction particles are distributed inside the high refractive index anti-dazzle coating, and the weight ratio of the outer anti-dazzle particles to the inner anti-dazzle high-refraction particles is (7-9) to (1-3).
2. The antiglare low reflection film according to claim 1, wherein the refractive index of the high refractive index precoat layer and the high refractive index antiglare coating layer is 1.63 to 1.68, the refractive index of the low refractive index coating layer is 1.33 to 1.4, and the refractive index of the base material layer is 1.47 to 1.55.
3. The antiglare low reflection film according to claim 2, wherein the antiglare low reflection film has a total haze A satisfying the formula A.gtoreq.85% B, wherein B is the total haze of the antiglare low reflection film after removal of the low refractive index coating.
4. The antiglare low reflection film according to claim 2, wherein the thickness of the high refractive index precoat layer is 30 to 60nm, and the coating liquid of the high refractive index precoat layer comprises the following components in parts by weight:
20-30 parts of hydrolyzed polymer, 20-30 parts of waterborne polyurethane, 5-10 parts of photoinitiator, 10-20 parts of wetting agent and 10-35 parts of organic solvent.
5. The antiglare low reflection film according to claim 4, wherein the hydrolyzed polymer comprises a methacryloxy silane hydrolyzed polymer and the aqueous polyurethane comprises an aqueous polyurethane.
6. The antiglare low reflection film according to claim 2, wherein the thickness of the high refractive index antiglare coating is 4 to 6 μm, and the coating liquid of the high refractive index antiglare coating comprises the following components in parts by weight:
30-40 parts of epoxy acrylic resin, 5-10 parts of outer anti-dazzle particles, 1-5 parts of inner anti-dazzle high-refraction particles, 5-10 parts of photoinitiator, 5-10 parts of flatting agent and 25-40 parts of organic solvent.
7. The antiglare low reflection film according to claim 6, wherein the epoxy acrylic resin has a functionality of 5 to 10.
8. The antiglare low reflection film according to claim 1, wherein the outer antiglare particles are silica particles having a particle diameter of 3 to 4 μm, the inner antiglare high refractive index particles are one or a combination of two of alumina particles and zirconia particles having a particle diameter of 100 to 300nm.
9. The antiglare low reflection film according to claim 2, wherein the low refractive index coating has a thickness of 95 to 105nm, and the coating liquid of the low refractive index coating comprises the following components in parts by weight:
20-30 parts of fluorine-containing multifunctional (methyl) acrylic resin, 10-20 parts of polyfunctional acrylate monomer, 5-10 parts of photoinitiator, 10-15 parts of hollow silica particles, 5-10 parts of flatting agent and 25-45 parts of organic solvent.
10. The antiglare low reflection film according to claim 1, wherein the high refractive index precoat layer and the high refractive index antiglare coating layer are coated by a micro-gravure coating method.
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