Recovery anti-glare film

Abstract

The present application provides a recovery anti-glare film, which comprises a transparent substrate and a recovery anti-glare layer formed on the transparent substrate, wherein the recovery anti-glare layer comprises an amine-based (meth)acrylate copolymer containing a siloxane group and a plurality of (meth)acrylate resin particles, wherein the weight average molecular weight (Mw) of the amine-based (meth)acrylate copolymer is between 4,000 and 60,000, and the (meth)acrylate resin particles have a 30% compression strength of 14.7 MPa to 49 MPa and a recovery rate of 22% or more. The recovery anti-glare film can provide scratch repair and stable and reliable anti-glare properties.

Description

Technical Field

[0001] This invention relates to an anti-glare film that can be used in image display devices, and more particularly to a restorative anti-glare film that provides scratch repairability and stable and reliable anti-glare performance. Background Technology

[0002] With the rapid development of display technology, such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs), there has been a widespread demand for display performance such as high contrast, wide viewing angle, high brightness, thinness, large size, high resolution, and diversified additional functions.

[0003] With the increase in handheld products, the surface of the display needs to be scratch-resistant to maintain the clarity and visibility of the displayed image. Therefore, a hard coating is generally used on the display surface, utilizing the hardness and lubricity of the hard coating to inhibit scratches and protect the display surface.

[0004] A self-healing protective coating for paint surfaces is also disclosed in the prior art, which utilizes rubber-like elasticity and lubricity to inhibit surface scratches. However, this scratch-resistant protective coating is not recommended for use on display surfaces due to its light reflectivity. Although silica particles can be added to this protective coating to increase its haze and reduce light reflectivity, the addition of particles will disrupt the self-healing properties of the coating. This would require a greater thickness to achieve the desired repair performance, whereas a minimum 15μm coating thickness is already necessary for self-healing.

[0005] This invention proposes an anti-glare film with self-healing properties, which provides stable and excellent anti-glare performance while also being scratch-repairable. Summary of the Invention

[0006] The purpose of this invention is to provide a restorative anti-glare film that is scratch-repairable and provides stable and satisfactory anti-glare performance.

[0007] The resilient anti-glare film of the present invention comprises a transparent substrate and a resilient anti-glare layer thereon, wherein the resilient anti-glare layer comprises an amino (meth)acrylate copolymer containing siloxane groups and a plurality of (meth)acrylate resin particles, wherein the (meth)acrylate resin particles have a 30% compressive strength of 14.7 to 49 MPa and a recovery rate of more than 22%.

[0008] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the particle size of the (meth)acrylate resin particles is between 1 μm and 15 μm, and preferably between 2 μm and 12 μm, and the amount of (meth)acrylate resin particles used relative to each hundred parts by weight of amino (meth)acrylate copolymer is between 1 part by weight and 20 parts by weight, and preferably between 1 part by weight and 18 parts by weight.

[0009] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the hysteresis loss of the (meth)acrylate resin particles is not greater than 30%, and preferably not greater than 25%.

[0010] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the product of the particle size of the (meth)acrylate resin particles and the amount of (meth)acrylate resin particles relative to the amount of amino (meth)acrylate copolymer used per 100 parts by weight is between 10 and 55.

[0011] In the restorative anti-glare film of the present invention, the thickness of the restorative anti-glare layer is between 3 μm and 15 μm, preferably between 3 μm and 12 μm.

[0012] In the restorative anti-glare film of the present invention, the surface roughness of the restorative anti-glare film is as follows: the arithmetic mean height Ra is between 0.14 and 0.75 μm, the maximum height Ry is between 1.00 and 6.50 μm, the ten-point average roughness Rz is between 0.70 and 3.50 μm, the single-peak average spacing S is between 0.050 and 0.300 μm, and the average peak spacing Sm is between 0.30 and 0.55 μm.

[0013] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the amino (meth)acrylate copolymer is as shown in formula (I), and its weight-average molecular weight (Mw) is between 4,000 and 60,000.

[0014]

[0015] Wherein, M1 and M2 are respectively urethane segments, and Q is a siloxane structure as shown in formula (II).

[0016]

[0017] Z1 and Z2 are each hydrogen or C1 to C4 alkyl, a is an integer from 2 to 70, and the siloxane structure accounts for 1 to 10% of the total mass of the amino (meth)acrylate copolymer.

[0018] In yet another embodiment of the restorative anti-glare film according to the present invention, the restorative anti-glare film may further incorporate a leveling agent of a (meth)acrylyl-modified organosilicon compound having a perfluoropolyether functional group into the restorative anti-glare layer.

[0019] According to a preferred embodiment of the restorative anti-glare film of the present invention, the leveling agent is used in the restorative anti-glare layer at an amount of 0.3 to 1.0 parts by weight, more preferably 0.4 to 0.8 parts by weight, relative to every 100 parts by weight of the amino (meth)acrylate copolymer.

[0020] Another object of the present invention is to provide a method for preparing a restorative anti-glare film, which includes uniformly mixing an amino (meth)acrylate copolymer and a plurality of (meth)acrylate resin particles to form a restorative anti-glare solution, coating the restorative anti-glare solution onto a transparent substrate, drying the substrate coated with the restorative anti-glare solution, and then curing it by radiation or electron beam to form a restorative anti-glare film.

[0021] The foregoing description is intended to provide a simplified explanation of this disclosure, enabling the reader to gain a basic understanding of it. This description is not a complete summary of the disclosure, nor is it intended to identify key / critical components of the embodiments or define the scope of the invention. Upon reviewing the following embodiments, those skilled in the art will readily understand the basic spirit of the invention and the technical means and implementation methods employed. Detailed Implementation

[0022] To make the description of the present invention more detailed and complete, illustrative descriptions of the embodiments and specific examples of the present invention are provided below; however, these are not the only forms of implementing or using the specific examples of the present invention. The various embodiments disclosed below can be combined or substituted with each other where advantageous, and other embodiments can be added to one embodiment without further description or explanation.

[0023] The advantages, features, and technical methods of the present invention will be more readily understood by referring to exemplary embodiments, and the invention may be implemented in different forms. Therefore, it should not be understood as limited to the embodiments set forth herein. Rather, the embodiments provided will enable this disclosure to more thoroughly and completely convey the scope of the invention to those skilled in the art, and the invention will be defined only as defined in the appended claims.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) and proper nouns that apply hereto shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and those terms as defined in commonly used dictionaries shall be understood to have the same meaning as the content of the relevant field, and shall not be interpreted in an overly idealized or overly formal sense unless explicitly defined thereto.

[0025] Furthermore, in this article, "(meth)acrylate" refers to methacrylate and acrylate; "30% compressive strength" is the compressive stress that (meth)acrylate resin particles withstand when their particle size deformation reaches 30% during compression; "recovery rate" is the proportion of particle size recovery when (meth)acrylate resin particles are subjected to a stress of 9.81 mN and then the stress is reduced to 1.96 mN; and "hysteresis loss" is the energy lost by the particle deformation during the recovery period after stress is applied to (meth)acrylate resin particles, representing the deformation recovery rate of the particles after stress is applied.

[0026] One object of the present invention is to provide a restorative anti-glare film that has both scratch repair properties and good anti-glare properties.

[0027] The resilient anti-glare film of the present invention comprises a transparent substrate and a resilient anti-glare layer thereon, wherein the resilient anti-glare layer comprises an amino (meth)acrylate copolymer containing siloxane groups and a plurality of (meth)acrylate resin particles, wherein the (meth)acrylate resin particles have a 30% compressive strength of 14.7 to 49 MPa and a recovery rate of more than 22%.

[0028] In one embodiment of the restorative anti-glare film of the present invention, a suitable substrate may be a film material with good mechanical strength and light transmittance, which may be, but is not limited to, resin film materials such as polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), triacetyl cellulose (TAC), polyimide (PI), polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), or cyclic olefin copolymer (COC).

[0029] In a preferred embodiment of the restorative anti-glare film of the present invention, the selected substrate preferably has a light transmittance of 80% or more, and particularly preferably has a light transmittance of 90% or more. The thickness of the substrate is approximately between 10 μm and 500 μm, preferably between 15 μm and 250 μm, and particularly preferably between 20 μm and 100 μm.

[0030] In the resilient anti-glare film of the present invention, the thickness of the resilient anti-glare layer can be between 3 μm and 15 μm, preferably between 3 μm and 12 μm. In a preferred embodiment of the resilient anti-glare film of the present invention, if the thickness of the resilient anti-glare layer is too thin, it is difficult to provide good scratch recovery; if the thickness of the resilient anti-glare layer is too thick, the anti-glare performance does not meet expectations.

[0031] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the amino (meth)acrylate copolymer is as shown in formula (I), and its weight-average molecular weight (Mw) is between 4,000 and 60,000.

[0032]

[0033] Wherein, M1 and M2 are respectively urethane segments, and Q is a siloxane structure as shown in formula (II).

[0034]

[0035] Z1 and Z2 are each hydrogen or C1 to C4 alkyl, a is an integer from 2 to 70, and the siloxane structure accounts for 1 to 10% of the total weight of the amino (meth)acrylate copolymer.

[0036] In a preferred embodiment of the present invention, the amino (meth)acrylate copolymer contains an aminocarbamate segment M1 formed by the reaction of a polyfunctional isocyanate with a hydroxyl group. Suitable polyfunctional isocyanates for the present invention are polyisocyanates having 3 to 6 isocyanate groups, and are polyisocyanate oligomers containing isocyanurate rings formed by the polymerization of aliphatic diisocyanates. Suitable aliphatic diisocyanates in the amino (meth)acrylate copolymers of the present invention may be, for example, one or a combination of hexamethylene diisocyanate (HDI) adducts, HDI isocyanurate-type polyisocyanates, HDI dimers, isophorone diisocyanates, or other combinations thereof, but are not limited thereto.

[0037] In a preferred embodiment of the invention, the amino (meth)acrylate copolymer contains an aminocarbamate segment M2 formed by the reaction of polycarbonate diol and diisocyanate. Suitable diol compounds in the amino (meth)acrylate copolymer of the invention may be, for example, one or a combination of 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 2-methyl-1,3-propanediol, 2-ethyl-1,6-hexanediol, 2,4-dimethyl-1,5-pentanediol, diol compounds comprising alicyclic or aromatic rings, but are not limited thereto. Suitable diisocyanates in the invention may be, for example, one or a combination of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), trimethylhexamethylene diisocyanate (TMDI), dicyclohexylmethane-4,4'-diisocyanate (HMDI), but are not limited thereto.

[0038] The amine (meth)acrylate copolymer used in the restorative anti-glare film of the present invention can preferably be a commercially available product, such as "AUP-727", "AUP-828", "AUP-838C", "AUP-849" or "AUP-1410" manufactured by Tokushiki Co., Ltd. of Japan.

[0039] In the restorative anti-glare film of the present invention, the particle size of the (meth)acrylate resin particles used in the restorative anti-glare layer is between 1 μm and 15 μm, and preferably between 2 μm and 12 μm, and the amount of (meth)acrylate resin particles used relative to each hundred parts by weight of amino (meth)acrylate copolymer is between 1 part by weight and 20 parts by weight, and preferably between 1 part by weight and 18 parts by weight.

[0040] In the restorative anti-glare layer of the restorative anti-glare film of the present invention, the product of the particle size of the (meth)acrylate resin particles and the amount of (meth)acrylate resin particles relative to the amount used per 100 parts by weight of the amino (meth)acrylate copolymer is between 10 and 55, and preferably between 10 and 40. In the restorative anti-glare film of the present invention, the restorative anti-glare film of the present invention can be obtained by adjusting the particle size of the (meth)acrylate resin particles and the amount of (meth)acrylate resin particles relative to the amount used per 100 parts by weight of the amino (meth)acrylate copolymer.

[0041] In the restorative anti-glare film of the present invention, the hysteresis loss of the (meth)acrylate resin particles of the restorative anti-glare layer is not greater than 30%, and preferably not greater than 25%.

[0042] In the resilient anti-glare film of the present invention, the (meth)acrylate resin particles of the resilient anti-glare layer are obtained by polymer derivatization of a mixture of 80 to 20 weight percent crosslinked oligomers and 20 to 80 weight percent monofunctional (meth)acrylate monomers, wherein the crosslinked oligomers are obtained by reacting polyols, polyisocyanates and (meth)acrylates having hydroxyl groups, and the crosslinked oligomers have an acrylic equivalent of 400 to 600 g / mol. When the crosslinked oligomers have too low or too high an acrylic equivalent, the (meth)acrylate resin particles cannot have appropriate flexibility. Furthermore, after the crosslinked oligomers are cured alone, their glass transition temperature (Tg) is between 0 and 30°C, preferably between 0 and 25°C. When Tg is less than 0°C, the (meth)acrylate resin particles become sticky; when Tg is greater than 30°C, it is difficult to obtain (meth)acrylate resin particles with high resilience.

[0043] In one embodiment of the (meth)acrylate resin particles of the present invention, the polyol suitable for preparing the crosslinkable oligomer may be, for example, but not limited to, one or a combination of polycarbonate polyols, polyester polyols, polyether polyols, aliphatic hydrocarbon polyols, alicyclic hydrocarbon polyols, etc. Preferably, the polyol has 2 to 4 hydroxyl groups and a number average molecular weight (Mn) of 200 to 3000.

[0044] In the (meth)acrylate resin particles of the present invention, the isocyanates suitable for preparing crosslinked oligomers can be those that are well known and usable in the art, and there are no particular limitations, such as aromatic polyisocyanates, aromatic aliphatic polyisocyanates, aliphatic polyisocyanates or alicyclic polyisocyanates, etc.

[0045] In one embodiment of the (meth)acrylate resin particles of the present invention, the hydroxyl-containing (meth)acrylate suitable for preparing crosslinked oligomers may be, for example, one or a combination of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl methacrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, caprolactone-modified 2-hydroxyethyl acrylate, polyethylene glycol mono(meth)acrylate, polypropylene glycol monoacrylate, 2-(meth)acryloyloxyethyl-2-hydroxyethyl phthalate, pentaerythritol triacrylate, etc., but is not limited thereto.

[0046] In one embodiment of the (meth)acrylate resin particles of the present invention, a suitable monofunctional (meth)acrylate monomer is a (meth)acrylate formed by esterification of an alcohol compound having 1 to 8 carbon atoms. It is not particularly limited and may be, for example, one or a combination of (meth)acrylate, (meth)acrylate, (meth)acrylate, (meth)acrylate, (meth)acrylate, (meth)acrylate, and (meth)acrylate.

[0047] In a preferred embodiment of the present invention, the (meth)acrylate resin particles may further possess a structure derived from other monomers during polymerization. Examples of these other monomers include 2-ethylhexyl (meth)acrylate, methyl methacrylate, styrene, acryloylmorpholine, phenoxyethyl (meth)acrylate, phenoxypropyl (meth)acrylate, benzyl (meth)acrylate, polyethoxyphenyl (meth)acrylate, phenyl benzyl (meth)acrylate, o-phenylphenol (meth)acrylate, cyclohexyl (meth)acrylate, dicyclopentenyl (meth)acrylate, dicyclopentyl (meth)acrylate, ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, 1,4-butanediol-di(meth)acrylate, 1,6-hexanediol-di(meth)acrylate, 1,9-nonanediol-di(meth)acrylate, etc. Other monomers may be used alone or in combination.

[0048] The (meth)acrylate resin particles used in the resilient anti-glare film of the present invention are preferably commercially available products, such as TECHPOLYMER manufactured by Sekisui Kasei Co., Ltd. of Japan. TM The MB series, MBP series, ACP series, and ACX series, such as MB-8C, MBP-8, ACX-806C, ACX-1502C, XX-5214Z, XX3954Z, etc.

[0049] According to the restorative anti-glare film of the present invention, the surface roughness of the anti-glare layer is as follows: the arithmetic mean height Ra is between 0.14 and 0.75 μm, the maximum height Ry is between 1.00 and 6.50 μm, the ten-point average roughness Rz is between 0.70 and 3.50 μm, the single-peak average spacing S is between 0.050 and 0.300 μm, and the average peak spacing Sm is between 0.30 and 0.55 μm.

[0050] The restorative anti-glare film of the present invention can immediately repair and restore the surface when there is slight damage or scratches, while providing stable and excellent anti-glare performance.

[0051] In another embodiment of the restorative anti-glare film of the present invention, a leveling agent of a (meth)acrylamide-modified organosilicon compound having perfluoropolyether functional groups is added to the restorative anti-glare layer to achieve good coating or smoothness, and also to give the anti-glare film good anti-fouling and abrasion resistance. The number-average molecular weight (Mn) of the organosilicon compound is between 1,500 and 16,000. Suitable leveling agents of (meth)acrylamide-modified organosilicon compounds with perfluoropolyether functional groups include, but are not limited to, commercially available X-71-1203E, KY-1203, KY-1211, or KY-1207 (purchased from Shingoshi Chemical Industry, Japan).

[0052] In one embodiment of the invention, the leveling agent is used in an amount of 0.3 to 1.0 parts by weight, preferably 0.4 to 0.8 parts by weight, relative to every 100 parts by weight of the amino (meth)acrylate copolymer.

[0053] Another object of the present invention is to provide a method for preparing a restorative anti-glare film, which includes uniformly mixing an amino (meth)acrylate copolymer and a plurality of (meth)acrylate resin particles to form a restorative anti-glare solution, coating the restorative anti-glare solution onto a transparent substrate, drying the substrate coated with the restorative anti-glare solution, and then curing it by radiation or electron beam to form a restorative anti-glare film.

[0054] The solvent used in the aforementioned method for preparing the anti-glare film of the present invention can be any organic solvent widely used in this technical field, such as ketones, aliphatic or alicyclic hydrocarbons, aromatic hydrocarbons, ethers, esters, or alcohols. One or more organic solvents can be used in both the acrylate composition and the anti-glare solution. Suitable solvents include, for example, acetone, butanone, cyclohexanone, methyl isobutyl ketone, hexane, cyclohexane, dichloromethane, dichloroethane, toluene, xylene, propylene glycol methyl ether, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, isopropanol, n-butanol, isobutanol, cyclohexanol, diacetone alcohol, propylene glycol methyl ether acetate, or tetrahydrofuran, or similar substances, but are not limited thereto.

[0055] In other embodiments of the present invention, additives such as antistatic agents, colorants, flame retardants, ultraviolet absorbers, antioxidants, surface modifiers, leveling agents without polyether modification, and defoamers may be added to the prepared restorative anti-glare solution as needed to provide different functional properties.

[0056] The aforementioned method for applying the restorative anti-glare solution can employ, for example, roller coating, doctor blade coating, dip coating, roller coating, spin coating, spray coating, slot coating, and other coating methods widely used in this technical field.

[0057] The following embodiments are used to further illustrate the present invention, but the content of the present invention is not limited thereto.

[0058] Example

[0059] Example 1: Preparation of a restorative anti-glare film

[0060] Nine parts by weight of amino (meth)acrylate copolymer (AUP-828, purchased from Tokushiki Co., Ltd., Japan), one part by weight of (meth)acrylate resin particles with a particle size of 3 μm (XX-5214Z, purchased from Sekisui Kasei Co., Ltd., Japan), and 20 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to ensure uniform dispersion, thus forming a restorative anti-glare solution. This restorative anti-glare solution was coated onto a polyethylene terephthalate (PET) substrate with a thickness of 80 μm and dried at 80 °C to form a restorative anti-glare layer with a thickness of 9.3 μm on the PET substrate.

[0061] The obtained anti-glare film was tested for transmittance, haze, anti-glare performance, resilience and surface roughness using the optical measurement methods described below. The results are listed in Tables 1 and 2 below.

[0062] Example 2: Preparation of a restorative anti-glare film

[0063] 5.6 parts by weight of amino (meth)acrylate copolymer (AUP-828, purchased from Tokushiki Co., Ltd., Japan), 0.99 parts by weight of (meth)acrylate resin particles with a particle size of 3 μm (XX-5214Z, purchased from Sekisui Kasei Co., Ltd., Japan), and 13.32 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to achieve uniform dispersion, thus forming a restorative anti-glare solution. This restorative anti-glare solution was coated onto a polyethylene terephthalate (PET) substrate with a thickness of 80 μm and dried at 80°C to form a restorative anti-glare layer with a thickness of 7.3 μm on the PET substrate.

[0064] The obtained anti-glare film was tested for transmittance, haze, anti-glare performance, resilience and surface roughness using the optical measurement methods described below. The results are listed in Tables 1 and 2 below.

[0065] Example 3: Preparation of a restorative anti-glare film

[0066] 5.6 parts by weight of amino (meth)acrylate copolymer (AUP-828, purchased from Tokushiki Co., Ltd., Japan), 0.06 parts by weight of (meth)acrylate resin particles with a particle size of 10 μm (XX-3954Z, purchased from Sekisui Kasei Co., Ltd., Japan), and 11.4 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to achieve uniform dispersion, thus forming a restorative anti-glare solution. This restorative anti-glare solution was coated onto a polyethylene terephthalate (PET) substrate with a thickness of 80 μm and dried at 80°C to form a restorative anti-glare layer with a thickness of 9.4 μm on the PET substrate.

[0067] The obtained anti-glare film was tested for transmittance, haze, anti-glare performance, resilience and surface roughness using the optical measurement methods described below. The results are listed in Tables 1 and 2 below.

[0068] Example 4: Preparation of a restorative anti-glare film

[0069] 5.6 parts by weight of amino (meth)acrylate copolymer (AUP-828, purchased from Tokushiki Co., Ltd., Japan), 0.18 parts by weight of (meth)acrylate resin particles with a particle size of 10 μm (XX-3954Z, purchased from Sekisui Kasei Co., Ltd., Japan), and 11.65 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to achieve uniform dispersion, thus forming a restorative anti-glare solution. This restorative anti-glare solution was coated onto a polyethylene terephthalate (PET) substrate with a thickness of 80 μm and dried at 80°C to form a restorative anti-glare layer with a thickness of 8.0 μm on the PET substrate.

[0070] The obtained anti-glare film was tested for transmittance, haze, anti-glare performance, resilience and surface roughness using the optical measurement methods described below. The results are listed in Tables 1 and 2 below.

[0071] Example 5: Preparation of a restorative anti-glare film

[0072] Nine parts by weight of an amino (meth)acrylate copolymer (AUP-828, purchased from Tokushiki Co., Ltd., Japan), one part by weight of (meth)acrylate resin particles with a particle size of 3 μm (XX-5214Z, purchased from Sekisui Kasei Co., Ltd., Japan), 0.013 parts by weight of a perfluoropolyether functional group (meth)acrylamide-modified organosilicon compound (KY-1203E, purchased from Shin-Etsu Chemical Co., Ltd., Japan), and 20 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to achieve uniform dispersion, thus forming a restorative anti-glare solution. This restorative anti-glare solution was coated onto a polyethylene terephthalate (PET) substrate with a thickness of 80 μm and dried at 80 °C to form a restorative anti-glare layer with a thickness of 7.5 μm on the PET substrate.

[0073] The obtained anti-glare film was tested for transmittance, haze, anti-glare performance, resilience, surface abrasion resistance and roughness using the optical measurement methods described below. The results are listed in Tables 1 and 2 below.

[0074] Optical measurement methods

[0075] The restorative anti-glare film prepared in the aforementioned embodiments was optically measured according to the measurement method of Japanese Industrial Standard (JIS).

[0076] Light transmittance measurement: The light transmittance was measured using an NDH-2000 haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd.) according to the measurement method of JIS K7361.

[0077] Haze measurement: The haze was evaluated using the NDH-2000 (manufactured by Nippon Denshoku Kogyo Co., Ltd.) according to the description in JIS K7136.

[0078] Anti-glare measurement: The restorative anti-glare film is bonded to a black acrylic board. Two fluorescent lights are shone onto the surface of the anti-glare film. The degree of diffusion of the fluorescent light is visually compared with the anti-glare film. The anti-glare performance of the anti-glare film is evaluated according to the following two levels.

[0079] X: The two separate fluorescent tubes can be clearly seen, and their outlines can be clearly distinguished as straight lines;

[0080] O: The two separate fluorescent tubes are not clearly visible.

[0081] Surface roughness measurement

[0082] Surface roughness measurement: Surface roughness was measured using a MITUTOYO Formtracer CS-5000 surface roughness and profile measuring instrument according to JIS B 0601-1994 method, measuring the average spacing (Sm), arithmetic mean roughness (Ra), and maximum roughness (Ry) of the unevenness of the restorative anti-glare film surface.

[0083] Methods for measuring resilience and abrasion resistance

[0084] Resilience measurement: On the surface of the resilient anti-glare film, use a brass brush at 100 gf / cm². 2 Under a frictional load, rub back and forth 10 times within 20 seconds, and check whether the scratches have disappeared five minutes after they are formed on the surface of the anti-glare layer.

[0085] O: No scratches were found on the surface;

[0086] X: Scratches were found on the surface.

[0087] Abrasion resistance measurement: On the surface of the resilient anti-glare film, #0000 steel wool was applied at 200 gf / cm². 2 Under a frictional load, rub back and forth 10 times at a speed of 60 rpm. Afterward, visually inspect the surface of the restorative anti-glare layer to see if any scratches are left.

[0088] O: No scratches were found on the surface;

[0089] X: Scratches were found on the surface.

[0090] Table 1: Optical measurement results of anti-glare films in Examples 1 to 5

[0091]

[0092]

[0093] Note 1: The amount of particles used is relative to every 100 parts by weight of amino (meth)acrylate copolymer.

[0094] Table 2: Surface roughness measurement results of anti-glare films in Examples 1 to 5

[0095]

[0096] As shown in Tables 1 and 2, the resilient anti-glare films prepared in Examples 1 to 5 of the present invention have good light transmittance and provide excellent haze and anti-glare properties, and also possess good resilience. Simultaneously, the resilient anti-glare film has a fine surface with a surface roughness of arithmetic mean height Ra between 0.151 and 0.688 μm, maximum height Ry between 1.076 and 5.695 μm, ten-point average roughness Rz between 0.716 and 3.325 μm, average single-peak spacing S between 0.062 and 0.256 μm, and average peak spacing Sm between 0.411 and 0.532 μm. Furthermore, the resilient anti-glare film prepared in Example 5 contains a leveling agent of a (meth)acrylyl-modified organosilicon compound with perfluoropolyether functional groups, thus achieving excellent wear resistance while maintaining good light transmittance, anti-glare properties, and resilience.

[0097] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Anyone skilled in the art should be able to make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the appended claims.

Claims

1. A restorative anti-glare film, comprising: Transparent substrate; and A restorative anti-glare layer is located on the transparent substrate, and the restorative anti-glare layer comprises: Amino (meth)acrylate copolymers containing siloxane groups; and Multiple (meth)acrylate resin particles, exhibiting a compressive strength of 30% ranging from 14.7 to 49 MPa and a recovery rate exceeding 22%. in, The amino (meth)acrylate copolymer is shown in formula (I), and its weight-average molecular weight (Mw) is between 4,000 and 60,000. Wherein, M1 and M2 are respectively urethane segments, and Q is a siloxane structure as shown in formula (II). Wherein, Z1 and Z2 are each hydrogen or C1 to C4 alkyl, a is an integer from 2 to 70, and the siloxane structure accounts for 1 to 10% of the total mass of the amino (meth)acrylate copolymer. The 30% compressive strength refers to the compressive stress that the (meth)acrylate resin particles withstand when their particle size deformation reaches 30% during compression. The recovery rate is the particle size recovery ratio of the (meth)acrylate resin particles when the stress is reduced to 1.96 mN after applying a stress of 9.81 mN.

2. The restorative anti-glare film according to claim 1, wherein, The particle size of the (meth)acrylate resin particles in the restorative anti-glare layer is between 1 μm and 15 μm, and the amount of the (meth)acrylate resin particles used relative to each hundred parts by weight of the amino (meth)acrylate copolymer is between 1 part by weight and 20 parts by weight.

3. The restorative anti-glare film according to claim 2, wherein the particle size of the (meth)acrylate resin particles in the restorative anti-glare layer is between 2 μm and 12 μm, and the amount of the (meth)acrylate resin particles used relative to each hundred parts by weight of the amino (meth)acrylate copolymer is between 1 part by weight and 18 parts by weight.

4. The restorative anti-glare film according to claim 1, wherein the product of the particle size of the (meth)acrylate resin particles in the restorative anti-glare layer and the amount of the (meth)acrylate resin particles relative to the amount used per 100 parts by weight of the amino (meth)acrylate copolymer is between 10 and 55.

5. The restorative anti-glare film according to claim 1, wherein the thickness of the restorative anti-glare layer is between 3 μm and 15 μm.

6. The restorative anti-glare film according to claim 1, wherein the surface roughness of the restorative anti-glare film is: the arithmetic mean height Ra is between 0.14 and 0.75 μm, the maximum height Ry is between 1.00 and 6.50 μm, the ten-point average roughness Rz is between 0.70 and 3.50 μm, the single-peak average spacing S is between 0.050 and 0.300 μm, and the average peak spacing Sm is between 0.30 and 0.55 μm.

7. The restorative anti-glare film according to claim 1, wherein, The (meth)acrylate resin particles of the restorative anti-glare layer have a hysteresis loss of no more than 30%, wherein the hysteresis loss is the energy lost by the particle deformation during the recovery period after stress is applied to the (meth)acrylate resin particles.

8. The restorative anti-glare film according to claim 1, wherein, The restorative anti-glare layer further comprises a leveling agent of a (meth)acrylyl-modified organosilicon compound having perfluoropolyether functional groups.

9. The restorative anti-glare film according to claim 8, wherein, The leveling agent of the (meth)acrylamide-modified organosilicon compound having perfluoropolyether functional groups is used in an amount of 0.3 to 1.0 parts by weight relative to every 100 parts by weight of the amino (meth)acrylate copolymer.

Images