Anti-glare film

Abstract

The invention discloses an anti-dazzle film. The anti-dazzle film comprises a regenerated PET base material and an anti-dazzle coating layer arranged on the regenerated PET base material, the regenerated PET base material comprises at least 50% of recycled PET resin, and the anti-dazzle coating layer comprises acrylic acid series adhesive resin and a plurality of amorphous silicon dioxide microparticles. According to the anti-dazzle film disclosed by the invention, the amorphous silicon dioxide microparticles form a concave-convex surface on the surface of the anti-dazzle coating, so that impurity particles and / or microbubbles in the regenerated PET film material can be effectively shielded, and the anti-dazzle film can be applied to a display.

Description

TECHNICAL FIELD

[0001] The present invention relates to an anti-glare film for image display devices, in particular, an anti-glare film using a recycled polyethylene terephthalate (PET) substrate. BACKGROUND

[0002] Polyethylene terephthalate (PET) is a versatile plastic widely used in various applications, including packaging, textiles, and films. With the demand for environmental sustainability and advancements in recycling technology, recycled PET can reduce dependence on virgin PET and minimize waste, contributing to sustainable development and supporting a circular economy.

[0003] In recent years, PET recycling has become a mature process, but recycled PET used in the process often contains a large number of complex fragments that cannot be melted, such as residual dyes, adhesives, or other contaminants. These impurities and contaminants can cause inclusions or microbubbles in recycled PET, resulting in performance defects. Currently, recycled PET can be widely used in packaging, textiles, automotive components, or construction industries, but there are still challenges and shortcomings in the optical-related industry that need to be addressed.

[0004] Based on the importance of recycled PET for environmental protection, resource conservation, energy consumption reduction, and promotion of sustainable circular economy, the present invention provides an optical-grade anti-glare film for displays made of recycled PET substrate to expand the application field of recycled PET. SUMMARY

[0005] The present invention provides an anti-glare film prepared using a recycled polyethylene terephthalate (recycled PET) film as a substrate, wherein the anti-glare coating on the recycled PET substrate effectively masks impurity particles or microbubbles in the recycled PET substrate for use in displays.

[0006] The anti-glare film of the present invention comprises a recycled PET substrate and an anti-glare coating on the recycled PET substrate, wherein the recycled PET substrate comprises at least 50% of recycled PET resin, and the anti-glare coating comprises an acrylic binder resin and a plurality of amorphous silica particles, the amount of amorphous silica particles used is between 0.5 parts by weight and 20.0 parts by weight per hundred parts by weight of acrylic binder resin.

[0007] In the anti-glare film of the present invention, the recycled PET substrate has a haze of between 0.1% and 3% and a light transmittance of at least 88%, and a thickness of between 40 μm and 80 μm.

[0008] The total haze of the anti-glare film of the present invention is greater than 15% and the surface haze is greater than 12%.

[0009] In the anti-glare film of the present application, the average particle size of the amorphous silica particles is between 2.0 μm and 10 μm, the BET specific surface area is between 60 m 2 / g and 300 m 2 / g and the particle size distribution measured by a laser method is between 0.2 μm and 25.0 μm.

[0010] In the anti-glare film of the present application, the amorphous silica particles form a concave-convex surface having a plurality of irregular projections on the surface of the anti-glare coating layer, the maximum height (Sz) of the surface roughness of the concave-convex surface is between 5.0 μm and 20.0 μm, the arithmetic mean height (Sa) is between 0.10 μm and 1.0 μm, the root mean square gradient (SΔq) is between 0.10° and 1.5° and the developed surface area ratio (Sdr) is between 1.0% and 45.0%.

[0011] In the anti-glare film of the present application, the thickness of the anti-glare coating layer is between 2 μm and 10 μm, preferably between 3 μm and 8 μm.

[0012] In the anti-glare film of the present application, the recycled PET substrate comprises at least 80% of recycled PET resin.

[0013] In the anti-glare film of the present application, the amount of the amorphous silica particles used is preferably between 1.0 parts by weight and 13.0 parts by weight per 100 parts by weight of the acrylic binder resin.

[0014] In the anti-glare film of the present application, the anti-glare coating layer can further comprise spherical organic particles having an average particle size of between 1.0 μm and 5.0 μm. In the anti-glare coating layer of the anti-glare film of the present application, the amount of the organic particles used is between 1.0 parts by weight and 15.0 parts by weight per 100 parts by weight of the acrylic binder resin.

[0015] The above summary of the application is intended to provide a simplified abstract of the disclosure to acquaint the reader with the general nature of the disclosure as it pertains to the application being presented and is not intended to be a complete overview of the disclosure, nor is it intended to delineate the substantial / critical elements of the application or to define the scope of the application. Those skilled in the art will readily appreciate the basic inventive aspects of the application and the technical handiwork employed by the application after reviewing the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0016] To make the description of the present disclosure more detailed and complete, the following describes the illustrative embodiments of the present application; but this is not the only form of implementation or use of the specific embodiments of the present application. The disclosed embodiments can be combined or replaced with each other in a beneficial case, and other embodiments can be added in an embodiment without further description or illustration.

[0017] The advantages, features and achieved technical methods of the present application will be described in more detail and more easily understood with reference to the illustrative embodiments, and the present application can be implemented in different forms, so it should not be understood as being limited to the embodiments described herein. On the contrary, the embodiments provided by those skilled in the art will make the present disclosure more thorough and complete, and fully convey the scope of the present application, and the present application will be defined only by the appended claims.

[0018] Unless otherwise defined, all terms used herein after (including technical and scientific terms) and proper nouns are essentially the same as those understood by those skilled in the art to which the present application belongs, such as those defined in commonly used dictionaries, should be understood as having the same meaning as the context of the relevant field, and unless explicitly defined herein, should not be understood as having an overly idealized or overly formal meaning.

[0019] In this document, the maximum height (Sz) of the surface roughness parameter is the sum of the maximum peak height (Sp) and the maximum valley depth (Sv); the arithmetic mean height (Sa) represents the arithmetic mean of the absolute coordinates Z(x, y) within a defined area; the root mean square gradient (SΔq) represents the average amplitude of the local gradient (slope) of the surface; and the developed surface area ratio (Sdr) represents the ratio of the increase in surface area calculated from the projected area-derived surface area.

[0020] Furthermore, in this document, the term "(meth)acrylate" refers to methacrylate and acrylate.

[0021] The present application provides an anti-glare film, which comprises a recycled PET substrate and an anti-glare coating layer disposed on the recycled PET substrate, wherein the recycled PET substrate comprises at least 50% of recycled PET resin, and the anti-glare coating layer comprises an acrylic binder resin and a plurality of amorphous silica particles. The anti-glare film of the present application forms a concave-convex surface on the surface of the anti-glare coating layer by the amorphous silica particles, which can effectively shield impurity particles and / or micro-bubbles in the recycled PET substrate for use in displays.

[0022] The anti-glare film of the present application comprises a recycled PET substrate comprising at least 50% of recycled PET resin having a haze of between 0.1% and 3% (measured according to JIS K 7136) and a light transmittance of at least 88% (measured according to JIS K 7361), and a thickness of between 40 μm and 80 μm. The recycled PET substrate used in the anti-glare film of the present application can be a commercially available product, such as RESHINE TM series of recycled PET films.

[0023] In the technical field of known functional optical films, the transparent substrate selected for the functional optical film is preferably a film material having a light transmittance of 90% or more and a haze of preferably 0% to meet the optical requirements. The anti-glare film of the present application uses a recycled PET film material made of a recycled PET substrate comprising at least 50% of recycled PET resin having a haze of between 0.1% and 3.0% (measured according to JIS K 7136) and a light transmittance of at least 88% (measured according to JIS K 7361), and a thickness of between 40 μm and 80 μm. The anti-glare film is formed by coating the recycled PET film material with an anti-glare coating layer comprising an acrylic binder resin and a plurality of amorphous silica particles to form an anti-glare film having a total haze of greater than 15% and a surface haze of greater than 12%. The anti-glare coating layer of the anti-glare film of the present application can effectively shield the impurity particles and / or micro-bubbles in the recycled PET film material serving as the substrate, and can be used in displays.

[0024] In a preferred embodiment of the anti-glare film of the present application, the recycled PET substrate preferably comprises at least 80% of recycled PET resin.

[0025] The anti-glare coating layer of the anti-glare film of the present application comprises an acrylic binder resin and a plurality of amorphous silica particles, and the amount of the amorphous silica particles used is between 0.5 parts by weight and 20.0 parts by weight per 100 parts by weight of the acrylic binder resin, and preferably between 1.0 parts by weight and 18.0 parts by weight.

[0026] In the anti-glare film of the present application, the average particle size of the amorphous silica particles in the anti-glare coating layer is between 2.0 μm and 10.0 μm, and preferably between 2.0 μm and 8.0 μm, and the BET specific surface area is between 60 m 2 / g and 100 m 2 / g. Furthermore, the amorphous silica particles used in the present application are preferably particles having a wide particle size distribution, such as a particle size distribution measured by a laser method of between 0.2 μm and 25.0 μm, and preferably between 0.3 μm and 20.0 μm. The amorphous silica particles can be a commercially available product, such as SS-50B, but not limited thereto. In other embodiments according to the present application, other amorphous silica microparticles can be selected as desired by those having ordinary skill in the art.

[0027] In the antiglare film of the present application, the amorphous silica microparticles of the antiglare coating form a concave-convex surface having a plurality of irregular projections on the surface of the antiglare coating, the maximum height (Sz) of the surface roughness of the concave-convex surface is between 5.0 μm and 20.0 μm, the arithmetic mean height (Sa) is between 0.10 μm and 1.0 μm, the root mean square gradient (SΔq) is between 0.10° and 1.5°, and the spread area ratio (Sdr) is between 1.0% and 45.0%.

[0028] In a preferred embodiment of the antiglare film of the present application, the amorphous silica microparticles of the antiglare coating form a concave-convex surface having a plurality of irregular projections on the surface of the antiglare coating, the maximum height (Sz) of the surface roughness of the concave-convex surface is between 7.0 μm and 18.0 μm, the arithmetic mean height (Sa) is between 0.20 μm and 0.8 μm, the root mean square gradient (SΔq) is between 0.15° and 1.2°, and the spread area ratio (Sdr) is between 1.5% and 42.0%.

[0029] In the antiglare film of the present application, the thickness of the antiglare coating on the recycled PET substrate is between 2.0 μm and 10 μm, and preferably between 3.0 μm and 8.0 μm.

[0030] In the antiglare film of the present application, the acrylic binder resin used in the antiglare coating includes a (meth)acrylate composition and an initiator, and the (meth)acrylate composition in the acrylic binder resin can include 35 to 50 parts by weight of a polyurethane (meth)acrylate oligomer having a functionality of 6 to 15, 12 to 20 parts by weight of a (meth)acrylate monomer having a functionality of 3 to 6, and 1.5 to 12 parts by weight of a (meth)acrylate monomer having a functionality of less than 3.

[0031] In a preferred embodiment of the present application, the polyurethane (meth)acrylate oligomer having a functionality of 6 to 15 is preferably an aliphatic polyurethane (meth)acrylate oligomer having a molecular weight of 1,500 to 4,500.

[0032] In a preferred embodiment of the present application, the (meth)acrylate monomer having a functionality of 3 to 6 is a (meth)acrylate monomer having a molecular weight of less than 800. The (meth)acrylate monomer having a functionality of 3 to 6 suitable for use in the present application can be one or a combination of pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), or dipentaerythritol pentaacrylate (DPPA), but is not limited thereto.

[0033] In a preferred embodiment of the present application, the (meth)acrylate monomer having a functionality of less than 3 can be a (meth)acrylate monomer having a functionality of 1 or 2, which is a (meth)acrylate monomer having a molecular weight of less than 500. The (meth)acrylate monomer having a functionality of less than 3 can use one or a combination of 1,6-hexanediol diacrylate (HDDA), cyclotrihydroxymethylpropane formal acrylate (CTFA), 2-phenoxyethyl acrylate (PHEA), or isobornyl acrylate (IBOA), but is not limited thereto.

[0034] The initiator suitable for use in the acrylate-based binder resin of the present application can be one generally known in the art, and is not particularly limited, and for example, a phenylacetone-based initiator, a benzophenone-based initiator, a benzopropylone-based initiator, a dibenzoyl-based initiator, a difunctional α-hydroxy ketone-based initiator, or an acylphosphine oxide-based initiator, etc. can be used. The aforementioned initiators can be used alone or in combination.

[0035] A leveling agent can be added to the antiglare coating layer of the antiglare film of the present application to provide a good coating or flatness. A leveling agent having recoatability can also be selectively added to the antiglare coating layer of the antiglare film of the present application to facilitate coating of other optical functional layers on the film surface of the antiglare film. A fluorine-based, (meth)acrylate-based, or silicone-based leveling agent can be used in the antiglare coating layer of the antiglare film of the present application.

[0036] In the antiglare film of the present application, the antiglare coating layer can further include a plurality of organic microparticles to adjust the haze. The organic microparticles that can be used in the antiglare coating layer of the antiglare film of the present application are spherical organic microparticles having an average particle diameter of 1.0 μm or less or 5.0 μm or more. In the antiglare film of the present application, the organic microparticles are used in an amount of 1.0 parts by weight to 15.0 parts by weight, preferably 2.0 parts by weight to 10.0 parts by weight, per 100 parts by weight of the acrylate-based binder resin.

[0037] The organic microparticles suitable for the anti-glare coating of the present application can be polymethyl methacrylate resin microparticles, polystyrene resin microparticles, styrene-methyl methacrylate copolymer microparticles, melamine microparticles, polyethylene resin microparticles, epoxy resin microparticles, polysiloxane resin microparticles, polyvinylidene fluoride resin or polyfluoroethylene resin microparticles.

[0038] Another object of the present application is to provide a method for preparing an anti-glare film. The method for preparing an anti-glare film of the present application comprises mixing a polyurethane (meth)acrylate oligomer having a functionality of 6 to 15, at least one (meth)acrylate monomer having a functionality of 3 to 6, at least one (meth)acrylate monomer having a functionality of less than 3, and an initiator in a suitable solvent to form an acrylic binder resin solution; adding amorphous silica microparticles, a leveling agent, and an organic solvent to the acrylic binder resin solution to form an anti-glare solution; coating the anti-glare solution on a recycled PET substrate; drying the recycled PET substrate coated with the anti-glare solution; and curing the anti-glare solution by radiation or electron beam to form an anti-glare coating on the recycled PET substrate, thereby obtaining an anti-glare film.

[0039] The solvent used in the aforementioned method for preparing an anti-glare film of the present application can be any organic solvent commonly used in the art, such as ketones, aliphatic or cycloaliphatic hydrocarbons, aromatic hydrocarbons, ethers, esters, or alcohols.

[0040] In other embodiments of the present application, additives such as antistatic agents, colorants, flame retardants, ultraviolet absorbers, antioxidants, surface modifiers, antibacterial agents, hydrophobically modified silica nanoparticles, or defoaming agents can be added to the prepared anti-glare solution to provide different functional properties.

[0041] The aforementioned method for coating the anti-glare solution can employ any coating method commonly used in the art, such as roll coating, blade coating, dip coating, roller coating, spin coating, spray coating, slit coating, and the like.

[0042] The anti-glare film of the present application can further be coated with a low-refractive layer on the anti-glare coating to provide an anti-reflection function and improve the transmittance, thereby improving the contrast in a dark room while maintaining the original anti-glare properties.

[0043] The following examples are provided to further illustrate the present application, which should not be construed as limiting the scope thereof.

[0044] Examples

[0045] Example 1: Preparation of an acrylic binder resin

[0046] An acrylic adhesive resin was formed by mixing 42 parts by weight of polyurethane acrylate oligomer (functionality 6, molecular weight approximately 1,600, viscosity approximately 36,000 cps (25°C), purchased from IGM Resins, Netherlands), 4.5 parts by weight of pentaerythritol triacrylate (PETA), 12 parts by weight of dipentaerythritol hexaacrylate (DPHA), 3 parts by weight of cyclotrimethylolpropane methyl acetal acrylate (CTFA), 4 parts by weight of photoinitiator (Chemcure-481, purchased from Heng Chiao Industry, Taiwan, China), 24.5 parts by weight of ethyl acetate (EAC), and 10 parts by weight of n-butyl acetate (nBAC) for 1 hour.

[0047] Example 1: Preparation of anti-glare film

[0048] 100 parts by weight of acrylic adhesive resin and 1.5 parts by weight of amorphous silica microparticles ( SS-50B has an average particle size of 4.0 μm and a BET specific surface area of ​​80 m². 2 The following ingredients were mixed and stirred for 1 hour to form an anti-glare coating solution: 0.28 parts by weight of a wetted dispersion (DisperBYK-2150, 5% solids content, ethyl acetate and propylene glycol methyl ether acetate, purchased from BYK, Germany); 20 parts by weight of a polyether-modified acrylate copolymer leveling agent (BYK-UV3535, 10% solids content, ethyl acetate, purchased from BYK, Germany); 4.5 parts by weight of a silica nanoparticle dispersion sol (NanoBYK-3650, 20nm average particle size, 31% solids content, propylene glycol methyl ether acetate / propylene glycol methyl ether, purchased from BYK, Germany); 16.6 parts by weight of ethyl acetate (EAC); and 70 parts by weight of n-butyl acetate (nBAC).

[0049] This anti-glare coating was applied to a 50μm recycled PET substrate with a haze of 1.9% and a light transmittance of 89%. TM Purchased from Toyobo Co., Ltd., Japan. After drying, it was heated in a nitrogen atmosphere at 298 mJ / cm³. 2 UV lamps with radiation doses are used for photocuring to form an anti-glare coating with a thickness of 4.0 μm on a recycled PET substrate.

[0050] The obtained anti-glare film underwent the following optical and physical property analyses, and the results are listed in Table 1.

[0051] Measurement of thickness: The thickness of the antiglare film was evaluated using an electronic thickness gauge, Extramess 2001 (Mahr Inc., Germany), according to the description of JIS K 5600-1-7:2014.

[0052] Measurement of transmittance: The transmittance was evaluated using NDH-2000 (Nippon Denshoku Corp., Japan), according to the description of JIS K 7361.

[0053] Measurement of haze: The haze was evaluated using NDH-2000 (Nippon Denshoku Corp., Japan), according to the description of JIS K 7136.

[0054] Measurement of internal and surface haze: On the surface of the antiglare film, a TAC film (T40UZ, manufactured by Fuji Film Corp.) having a thickness of 40 μm was attached using a transparent optical adhesive, whereby the uneven surface of the antiglare film was made flat. In this state, the haze was evaluated using NDH-2000 (Nippon Denshoku Corp., Japan), according to the description of JIS K 7136, to obtain the internal haze value. Then, the surface haze value was obtained by subtracting the internal haze value from the total haze value.

[0055] Measurement of gloss: The antiglare film was attached to a black acrylic plate via a transparent optical adhesive, and the gloss was measured using a BYK micro-gloss gloss meter, according to the description of JIS Z 8741, to obtain the 20-, 60-, and 85-degree angle gloss values.

[0056] Measurement of clarity: The antiglare film was cut into 5 x 8 cm 2 squares, and the clarity was measured using a SUGA ICM-IT image clarity meter, according to the description of JIS K 7374. The values measured for 0.125 mm, 0.25 mm, 0.50 mm, 1.00 mm, and 2.00 mm slits were added together.

[0057] Evaluation of antiglare property of the antiglare film: The antiglare film was attached to a black acrylic plate via a transparent optical adhesive, and 2 fluorescent light tubes were projected onto the surface of the antiglare film. The degree of blurring of the fluorescent light tubes was visually observed, and the antiglare property of the antiglare film was evaluated according to the following 5 grades. The antiglare property was determined to be passed when the grade was Lv. 4 or higher.

[0058] Lv. 1: The 2 fluorescent light tubes were clearly seen separately, and the outline was clearly recognized as a straight line.

[0059] Lv. 2: The 2 fluorescent light tubes were clearly seen separately, but the outline was slightly blurred.

[0060] Lv.3: Two separate fluorescent tubes are visible, their outlines are vaguely visible, but their shapes can be discerned.

[0061] Lv.4: It can be seen that there are 2 fluorescent tubes, but their shapes cannot be identified.

[0062] Lv.5: The two separate fluorescent tubes are not visible, nor can their shapes be discerned.

[0063] Surface roughness measurement: The anti-glare film was adhered to a black acrylic plate using transparent optical adhesive. The surface roughness was measured at 640 x 640 μm using an OLYMPUS LEXT OLS5000-SAF 3D laser confocal microscope and an MPLAPON 20xLEXT objective lens. 2 Four 3D surface roughness images were taken for the area of ​​the surface roughness. The arithmetic mean height (Sa), maximum height (Sz), root mean square gradient (tilt angle) (SΔq), and unfolded specific surface area (Sdr) were measured according to the surface roughness description of ISO 25178-2:2012. Each test was performed five times and the average value was taken.

[0064] Panel evaluation of foreign object coverage: After the location of the foreign object is marked, the recycled PET substrate is made into an anti-glare film and then bonded to the SHARP AQOUS 8K LC-70X500T LCD monitor with the surface treatment layer removed by transparent optical adhesive. The foreign object is observed at a viewing angle of 0° to 60°. If the obscurity is 100%, it is rated as "Excellent" (◎). If the obscurity is 75% or more but less than 100%, it is rated as "Excellent" (〇). If the obscurity is 50% or more but less than 75%, it is rated as "Acceptable" (Δ). If the obscurity is less than 50%, it is rated as "Poor" (×).

[0065] Example 2: Preparation of anti-glare film

[0066] Example 2 prepared an anti-glare film using the same method as in Example 1, except that 3 parts by weight of amorphous silica microparticles and 0.55 parts by weight of a wetting and dispersing agent were used to prepare the anti-glare coating liquid. This anti-glare coating liquid was coated onto a 50 μm recycled PET substrate with a haze of 1.9% and a light transmittance of 89%. TM The material (purchased from Toyobo Co., Ltd., Japan) was dried and cured as in Example 1 to form an anti-glare coating with a thickness of 4.2 μm on a recycled PET substrate. Optical and physical property analyses were performed on the obtained anti-glare film, and the results are listed in Table 1.

[0067] Example 3: Preparation of anti-glare film

[0068] Example 3 An antiglare film was prepared using the same method as in Example 1, except that 6 parts by weight of amorphous silica microparticles and 1.1 parts by weight of a wet dispersant were used to prepare an antiglare coating solution. This antiglare coating solution was applied to a 50-μm regenerated PET substrate (RESHINE TM , available from Toyobo Co., Ltd., Japan) having a haze of 1.9% and a light transmittance of 89%, and after drying and curing as in Example 1, an antiglare coating layer having a thickness of 4.2 μm was formed on the regenerated PET substrate. The resulting antiglare film was subjected to optical and physical property analyses, and the results are shown in Table 1.

[0069] Example 4: Preparation of an antiglare film

[0070] Example 4 An antiglare film was prepared using the same method as in Example 1, except that 7.0 parts by weight of amorphous silica microparticles and 1.9 parts by weight of a wet dispersant were used, and 3.1 parts by weight of spherical polystyrene microparticles (XX-40IK, average particle diameter 3 μm, available from Sekisui Plastics Co., Ltd., Japan) were added to prepare an antiglare coating solution. This antiglare coating solution was applied to a 50-μm regenerated PET substrate (RESHINE TM , available from Toyobo Co., Ltd., Japan) having a haze of 1.9% and a light transmittance of 89%, and after drying and curing as in Example 1, an antiglare coating layer having a thickness of 5.8 μm was formed on the regenerated PET substrate. The resulting antiglare film was subjected to optical and physical property analyses, and the results are shown in Table 1.

[0071] Example 5: Preparation of an antiglare film

[0072] Example 5 An antiglare film was prepared using the same method as in Example 1, except that 10.6 parts by weight of amorphous silica microparticles and 2.9 parts by weight of a wet dispersant were used, and 3.3 parts by weight of spherical polystyrene microparticles (XX-40IK, average particle diameter 3 μm, available from Sekisui Plastics Co., Ltd., Japan) were added to prepare an antiglare coating solution. This antiglare coating solution was applied to a 50-μm regenerated PET substrate (RESHINE TM , available from Toyobo Co., Ltd., Japan) having a haze of 1.9% and a light transmittance of 89%, and after drying and curing as in Example 1, an antiglare coating layer having a thickness of 5.8 μm was formed on the regenerated PET substrate. The resulting antiglare film was subjected to optical and physical property analyses, and the results are shown in Table 1.

[0073] Example 6: Preparation of an antiglare film

[0074] Example 6 A glare-reducing film was prepared using the same method as in Example 1, except that 3.9 parts by weight of amorphous silica microparticles and 1.1 parts by weight of a wet dispersing agent were used, and 6.6 parts by weight of spherical polystyrene microparticles (XX-40IK, average particle diameter 3 μm, available from Sekisui Plastics Co., Ltd., Japan) were added to prepare a glare-reducing coating solution. This glare-reducing coating solution was applied to a 50 μm recycled PET substrate (RESHINE TM , available from Toyobo Co., Ltd., Japan) having a haze of 1.9% and a light transmittance of 89%, and after drying and curing as in Example 1, a glare-reducing coating layer having a thickness of 5.0 μm was formed on the recycled PET substrate. The resulting glare-reducing film was subjected to optical and physical property analysis, and the results are shown in Table 1.

[0075] Table 1 Physical properties of the glare-reducing films of Examples 1-6

[0076]

[0077]

[0078] As can be seen from Table 1, the glare-reducing films obtained in Examples 1 to 6, which were prepared using recycled PET as the substrate, exhibited excellent glare- reducing properties and foreign matter hiding properties due to the formation of a concave-convex surface having a plurality of irregular projections by the amorphous silica microparticles in the glare-reducing coating layer.

[0079] Although the present application has been disclosed with reference to examples as above, it is not intended to limit the present application, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the scope of protection of the present application is defined by the appended claims.

Claims

1. An anti-glare film, comprising: Recycled PET substrate, containing at least 50% recycled PET resin; and An anti-glare coating is applied to the recycled PET substrate; The anti-glare coating comprises an acrylic binder resin and a plurality of amorphous silica microparticles, wherein the amount of amorphous silica microparticles used is between 0.5 parts by weight and 20.0 parts by weight per 100 parts by weight of the acrylic binder resin.

2. The anti-glare film according to claim 1, wherein the recycled PET substrate has a haze between 0.1% and 3% and a light transmittance of at least 88%.

3. The anti-glare film according to claim 1, wherein the total haze of the anti-glare film is greater than 15% and the surface haze is greater than 12%.

4. The anti-glare film according to claim 1, wherein the average particle size of the amorphous silica microparticles is between 2.0 μm and 10 μm, and the BET specific surface area is between 60 m². 2 / g to 100m 2 The particle size distribution, measured by laser method, is between 0.2 μm and 25.0 μm, with a particle size distribution between 0.2 μm and 25.0 μm.

5. The anti-glare film according to claim 1, wherein the amorphous silica microparticles form a rough surface with a plurality of irregular protrusions on the surface of the anti-glare coating, wherein the maximum height of the surface roughness of the rough surface is between 5.0 μm and 20.0 μm, the arithmetic mean height is between 0.10 μm and 1.0 μm, the root mean square gradient is between 0.10° and 1.5°, and the unfolded surface area ratio is between 1.0% and 45.0%.

6. The anti-glare film according to claim 1, wherein the recycled PET substrate comprises at least 80% recycled PET resin.

7. The anti-glare film according to claim 1, wherein the amount of the amorphous silica microparticles used is between 1.0 parts by weight and 18.0 parts by weight per 100 parts by weight of the acrylic adhesive resin.

8. The anti-glare film according to claim 1, wherein the anti-glare coating further comprises a plurality of spherical organic microparticles, the amount of which is between 1.0 parts by weight and 15.0 parts by weight per 100 parts by weight of the acrylic adhesive resin.

9. The anti-glare film according to claim 8, wherein the average particle size of the organic microparticles is between 1.0 μm and 5.0 μm.

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