CN112540421A - Anti-dazzle film and polarizing plate with same - Google Patents
Anti-dazzle film and polarizing plate with same Download PDFInfo
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- CN112540421A CN112540421A CN202011500008.6A CN202011500008A CN112540421A CN 112540421 A CN112540421 A CN 112540421A CN 202011500008 A CN202011500008 A CN 202011500008A CN 112540421 A CN112540421 A CN 112540421A
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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
- G02B1/14—Protective coatings, e.g. hard coatings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention discloses an anti-dazzle film, which comprises a polyethylene terephthalate (PET) base material; and a cured anti-glare hard coating layer formed on one surface of the light-transmitting substrate, wherein the cured anti-glare hard coating layer comprises 75 to 90 parts by weight of an acrylic binder resin, 0.01 to 10 parts by weight of silica nanoparticles, and 5 to 20 parts by weight of organic microparticles. The antiglare film has a total haze of 35% to 50% and a surface haze of 10% to 15%, and a gloss at 60 degrees viewing angle of 30% to 50%. The antiglare film provides satisfactory antiglare properties and surface fineness, particularly antiglare properties at a wide viewing angle to increase visibility of the display as a whole.
Description
Technical Field
The present invention relates to an anti-glare film for image display devices and a polarizing plate comprising the same.
Background
With the development of display technologies, for example, image display devices such as Liquid Crystal Displays (LCDs), organic light emitting diode displays (OLEDs), etc., demands for display performance such as high contrast, wide viewing angle, high brightness, thinness, upsizing, high definition, and diversification of additional functions have been widely raised.
An anti-glare effect of light diffusion is achieved by using an anti-glare film with a rough surface on the surface of a display, but when the anti-glare property is improved and the surface roughness is increased, white fogging of an anti-glare layer is caused, and the visibility and contrast of a displayed image are reduced. With the development of high-resolution liquid crystal displays, the antiglare film for a high-resolution display requires a fine surface to prevent the image definition from being affected, but this causes the surface whitening phenomenon caused by the reflection of external light on the display surface, and at the same time, when light generated by the backlight inside the display passes through the rough surface of the antiglare film on the display surface, the microlens effect is generated to cause the flicker phenomenon inside, which is not favorable for the color reproducibility or definition of the display during image generation, and affects the expected contrast to cause the poor image visibility.
It is known to coat organic fine and/or nano particles with Triacetyl cellulose (TAC) film to prepare an anti-glare film, but TAC film is easy to absorb moisture and has poor weather resistance, so polyethylene terephthalate (PET) and polymethyl methacrylate (PMMA) films with good weather resistance and good light transmittance are frequently used as the substrate of the optical film at present. When the PMMA film is used as a substrate, due to the film surface property of the PMMA film, the particles can easily approach the upper edge of the coating layer by the co-dissolution effect generated by the coating layer and the film surface when the particles are coated, so as to achieve the anti-dazzle property. However, when the PET film is used, the co-solvent layer is not easily formed on the surface of the PET film, so that the particles are easily precipitated, the particles are not easily protruded from the surface of the PET film, and the anti-glare property is lost, and the co-solvent layer is not easily formed on the surface of the PET film, so that the adhesion between the anti-glare coating and the PET film may be poor.
The present invention proposes an antiglare film using polyethylene terephthalate (PET) as a base material, which can provide satisfactory antiglare properties and can achieve high fineness, high resolution, no flicker, and good visibility, and has good adhesion.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides an antiglare film to solve the above problems.
Accordingly, an object of the present invention is to provide an antiglare film comprising:
a polyethylene terephthalate (PET) substrate; and
a cured antiglare hard coat layer formed on a surface of the substrate, wherein the cured antiglare hard coat layer comprises:
75 to 90 parts by weight of an acrylic binder resin;
0.01 to 10 parts by weight of silica nanoparticles;
5 to 20 parts by weight of organic fine particles; and
0.05 to 2 parts by weight of a leveling agent;
the antiglare film has a total haze of 35% to 50% and a surface haze of 10% to 15%, and a gloss at a viewing angle of 60 degrees of 30% to 50%.
As an optional technical solution, the total haze of the anti-glare film is 40% to 50%, the inner haze is 27% to 40%, and the surface haze is 10% to 13%.
As an optional technical scheme, the average particle size of the organic microparticles is 2-6 μm.
As an optional technical scheme, the average particle size of the organic microparticles is 2-5 μm.
As an optional technical scheme, the primary particle diameter (d50) of the silicon dioxide nano-particles is 5nm to 30nm, and the secondary particle diameter (d50) of the silicon dioxide nano-particles is 50nm to 120 nm.
As an alternative solution, the acrylic binder resin is preferably used in an amount of 80 to 90 parts by weight.
As an alternative embodiment, the organic fine particles are preferably used in an amount of 7 to 15 parts by weight.
As an alternative solution, the silica nanoparticles are preferably used in an amount of 0.05 to 7 parts by weight.
As an alternative solution, the leveling agent is preferably used in an amount of 0.1 to 1 part by weight.
As an optional technical solution, the organic fine particles are polymethyl methacrylate resin fine particles, polystyrene resin fine particles, styrene-methyl methacrylate copolymer fine particles, polyethylene resin fine particles, epoxy resin fine particles, silicone resin fine particles, polyvinylidene fluoride resin fine particles, or polyvinyl fluoride resin fine particles, the surfaces of which are subjected to hydrophobic treatment or hydrophilic treatment.
As an alternative solution, the refractive index of the organic fine particles is 1.40 to 1.60.
As an alternative solution, the thickness of the cured antiglare hard coat layer is from 3 μm to 9 μm.
As an optional technical scheme, the flatting agent is a polyether modified polysiloxane flatting agent.
As an alternative solution, the acrylic binder resin comprises a (meth) acrylate composition and an initiator, the (meth) acrylate composition comprising:
35 to 50 parts by weight of a urethane (meth) acrylate oligomer having a functionality of 6 to 15;
12 to 20 parts by weight of a (meth) acrylate ester 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;
wherein the molecular weight of the urethane (meth) acrylate oligomer is 1,000 to 4,500.
As an alternative solution, the urethane (meth) acrylate oligomer having a functionality of 6 to 15 is an aliphatic urethane (meth) acrylate oligomer.
As an alternative, the (meth) acrylate monomer having a functionality of 3 to 6 is at least one selected from the group consisting of pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dpp (m) a, dipentaerythritol hexa (meth) acrylate, dph (m) a, trimethylolpropane tri (meth) acrylate, tmpt (m) a, ditrimethylolpropane tetra (meth) acrylate, dtmpt (m) a, and pentaerythritol tri (meth) acrylate (pet), or a combination thereof.
As an alternative, the (meth) acrylate monomer having a functionality of less than 3 is selected from the group consisting of 2-ethylhexyl (meth) acrylate, 2-EH (M) A, 2-hydroxyethyl (meth) acrylate, 2-HE (M) A, 3-hydroxypropyl (meth) acrylate, 3-HP (M) A, 4-hydroxybutyl (meth) acrylate, 4-HB (M) A, 2-butoxyethyl (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1, 6-cyclohexanediol (meth) HDD, 1-hydroxyethyl (meth) acrylate, 2-EH (M) A, 2-butoxyethyl (meth) acrylate, and 1,6-hexanediol di (meth) acrylate, Cyclic trimethylolpropane formal (meth) acrylate (CTF (M) A), 2-phenoxyethyl (meth) acrylate (2-phenoxyethyl (meth) acrylate, PHE (M) A), tetrahydrofuran (meth) acrylate (tetrahydrofuran (meth) acrylate, THF (M) A), lauryl (meth) acrylate (lauryl (meth) acrylate, L (M) A), diethylene glycol di (meth) acrylate (DEGD (M) A), dipropylene glycol di (meth) acrylate (DPGD (M) A), tripropylene glycol di (meth) acrylate (TPGD (M) A), and isobornyl (meth) acrylate (isobornyl (meth) acrylate).
As an optional technical solution, the initiator is at least one selected from the group consisting of acetophenone initiator, diphenyl ketone initiator, phenylpropanone initiator, dibenzoyl initiator, bifunctional α -hydroxy ketone initiator, and acylphosphine oxide initiator, or a combination thereof.
The invention also provides a polarizing plate comprising a polarizing component, wherein at least one surface of the polarizing component is provided with the anti-dazzle film.
Compared with the prior art, the surface haze of the anti-dazzle film and the polarizing plate with the anti-dazzle film can effectively reduce the flicker on the surface of a display and the internal haze of the anti-dazzle layer is damaged properly, so that the anti-dazzle film has satisfactory anti-dazzle property, high fineness and high resolution, does not flicker and has good visibility. The anti-glare film and the polarizing plate having the same disclosed in the present invention also provide excellent display quality at a wide viewing angle, and anti-glare properties at a wide viewing angle to increase visibility of the entire display. The anti-dazzle film and the polarizing plate with the anti-dazzle film disclosed by the invention have good adhesion between the anti-dazzle layer and the base material.
The present invention will be described in detail with reference to specific examples, but the present invention is not limited thereto.
Detailed Description
In order to make the disclosure more complete and complete, the following description sets forth illustrative aspects and embodiments of the invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments disclosed below may be combined with or substituted for one another where appropriate, and additional embodiments may be added to one embodiment without further recitation or description.
The advantages, features, and technical solutions of the present invention will be described in greater detail with reference to exemplary embodiments for easier understanding, and the present invention may be embodied in different forms, so should not be construed as limited to the embodiments set forth herein, but rather should be construed as providing embodiments that will provide a more thorough and complete understanding of the present disclosure and will fully convey the scope of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.
Unless otherwise defined, all terms (including technical and scientific terms) and specific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly idealized or overly formal sense unless expressly so defined herein.
In this specification, the term "(meth) acrylate" refers to both methacrylate and acrylate. The average primary particle diameter (d50) of the particles means the particle diameter corresponding to the cumulative particle size distribution of the original particles of 50%, and the average secondary particle diameter (d50) of the particles means the particle diameter corresponding to the cumulative particle size distribution of the secondary particles formed by agglomeration of the particles of 50%.
An object of the present invention is to provide an antiglare film comprising a polyethylene terephthalate (PET) substrate; and a cured anti-glare hard coating layer formed on the surface of the substrate, wherein the cured anti-glare hard coating layer comprises 75 to 90 parts by weight of an acrylic binder resin, 0.01 to 10 parts by weight of silica nanoparticles, 5 to 20 parts by weight of organic microparticles, and 0.05 to 2 parts by weight of a leveling agent, the anti-glare film having a total haze of 35 to 50% and a surface haze of 10 to 15%, and a gloss at a viewing angle of 60 degrees of 30 to 50%.
The antiglare film of the present disclosure preferably has a total haze of 40% to 50%, an inner haze of 27% to 40%, and a surface haze of 10% to 13%. The surface haze of the antiglare film of the present invention can effectively reduce the glare on the display surface and the appropriate internal haze destroys the internal scattering of the antiglare layer to provide satisfactory antiglare properties and can achieve high definition, high resolution, no glare and good visibility.
The antiglare film disclosed in the present invention provides, in addition to satisfactory antiglare properties and surface fineness, a glossiness of 30% to 50% at a viewing angle of 60 degrees, and a glossiness in this range can provide excellent display quality at a wide viewing angle. If the glossiness at the viewing angle of 60 degrees is greater than 50%, the antiglare property of the antiglare film is reduced, and the external light source cannot be effectively scattered, so that the display device has a problem of reduced display quality due to the influence of light reflection of the external light source, and if the glossiness at the viewing angle of 60 degrees is less than 30%, the antiglare property of the antiglare film is too high, so that the display image of the display device is easily blurred.
The anti-dazzle film disclosed by the invention adopts the PET film as the base material, and not only provides satisfactory anti-dazzle property and surface fineness, but also has good adhesion between the anti-dazzle layer and the base material.
In one embodiment of the present invention, the PET substrate of the anti-glare film has a light transmittance of 80% or more, preferably 90% or more, and the thickness of the PET substrate is about 10 μm to 250 μm, preferably 20 μm to 100 μm.
In one embodiment of the present invention, the cured antiglare hard coat layer of the antiglare film has a thickness of 3 μm to 9 μm, preferably 4 μm to 7 μm.
In the antiglare film disclosed by the present invention, the acrylic binder resin is used in an amount of 75 to 90 parts by weight, preferably 80 to 90 parts by weight.
In the disclosed antiglare film, the cured antiglare hard coat layer comprises organic microparticles and silica nanoparticles, wherein the organic microparticles provide an appropriate internal haze to homogenize light emitted from the interior of the display for light diffusion to provide the cured antiglare hard coat layer. The internal haze of the antiglare film of the present invention can be adjusted depending on the refractive index, particle size and addition amount of the organic fine particles to be used. The organic fine particles suitable for use in the present invention have a refractive index of 1.40 to 1.60 and an average particle diameter of 2 μm to 6 μm, preferably 2 μm to 5 μm. The organic microparticles are used in an amount of 5 to 20 parts by weight, preferably 7 to 15 parts by weight. If the amount of the organic fine particles used is too low, a sufficient light scattering effect cannot be provided, the antiglare property of the antiglare film is insufficient, and the display is easily affected by light reflection from an external light source, resulting in a problem of deterioration in display quality. If the amount of organic fine particles used is too high, the light scattering effect of the antiglare film becomes too high, and the display image of the display tends to suffer from whitening and contrast deterioration.
Suitable organic fine particles are polymethyl methacrylate resin fine particles, polystyrene resin fine particles, styrene-methyl methacrylate copolymer fine particles, polyethylene resin fine particles, epoxy resin fine particles, silicone resin fine particles, polyvinylidene fluoride resins, or polyvinyl fluoride resin fine particles, the surfaces of which are subjected to hydrophobic treatment or hydrophilic treatment. The organic particles can be resin fine particles containing styrene group, or organic particles whose surface is hydrophilically treated with, for example, 2-hydroxyethyl (meth) acrylate (2-HE (M) A) or (meth) acrylonitrile (meth) acrylate.
In an antiglare film of the present invention, the cured antiglare hard coat layer contains silica nanoparticles that promote the resistance of organic particles to sedimentation and increase the fineness of the surface of the cured antiglare hard coat layer. Silica nanoparticles having an average primary particle diameter (d50) of about 5nm to about 30nm and an average secondary particle diameter (d50) of about 50nm to about 120nm are suitably used in the present invention in an amount of 0.01 to 10 parts by weight, preferably 0.05 to 7 parts by weight. If the amount of the silica nanoparticles used is too low, the organic fine particles cannot be effectively prevented from settling, and the surface irregularities on the antiglare film cannot be appropriately provided to increase the fineness. If the amount of the silica nanoparticles used is too high, the haze of the antiglare film tends to be increased due to the decrease in the dispersibility of the silica nanoparticles, and problems such as whitening and decrease in contrast occur in the display.
The antiglare film of the present invention, wherein the leveling agent is preferably used in an amount of 0.1 to 1 part by weight.
In the antiglare film of the present invention, the cured antiglare hard coat layer contains a leveling agent to provide a good coating surface and has surface lubricity, antifouling property, scratch resistance, and the like. The leveling agent which can be used for the antiglare film of the present invention may be a fluorine-based or organosilicon-based leveling agent, such as silicone oil, fluorine-based surfactant, and the like. The leveling agent suitable for use in the cured antiglare hard coat layer of the antiglare film of the present invention may be, for example, polyether-modified polysiloxane, and is used in an amount of 0.05 parts by weight to 2 parts by weight, preferably 0.2 parts by weight to 1 part by weight. If the amount of the leveling agent used is too low, the content of the leveling agent on the surface of the antiglare film becomes insufficient, and drying defects are likely to occur during coating. If the amount of the leveling agent used is too high, the leveling agent generates excessive micelles inside the antiglare film, and the physical properties of the antiglare film are degraded.
In the antiglare film of the present invention, the acrylic binder resin of the cured antiglare hard coat layer comprises a (meth) acrylate composition and an initiator, wherein the (meth) acrylate composition comprises 35 to 50 parts by weight of a urethane (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, wherein the urethane (meth) acrylate oligomer has a molecular weight of 1,000 to 4,500. The acrylic binder resin used in the present invention can provide a cured antiglare hard coat layer having good adhesion to a PET substrate, and also having good weather resistance, sufficient surface hardness and scratch resistance.
In one embodiment of the present invention, the urethane (meth) acrylate oligomer having a functionality of 6 to 15 has a molecular weight of not less than 1,000, preferably 1,500 to 4,500. In a preferred embodiment of the present invention, the urethane (meth) acrylate oligomer having a functionality of 6 to 15 is preferably an aliphatic urethane (meth) acrylate oligomer having a functionality of 6 to 15.
In one embodiment of the present invention, the (meth) acrylate monomer having a functionality of 3 to 6 has a molecular weight of less than 1,000, preferably less than 800. The (meth) acrylate monomer having a functionality of 3 to 6 suitable for use in the present invention may be, for example, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dpp (m) a, dipentaerythritol hexa (meth) acrylate, dph (m) a, trimethylolpropane tri (meth) acrylate (trimethyolpropane tri (meth) acrylate, tmpt (m) a), ditrimethylolpropane tetra (meth) acrylate (trimethyolpropane tetra (meth) acrylate, dtmpt m) a), pentaerythritol tri (meth) acrylate (pentaerythriol tri (meth) acrylate (pet) a, or a combination thereof, but is not limited thereto. The (meth) acrylate monomer having a functionality of 3 to 6 is preferably one of pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), dipentaerythritol pentaacrylate (DPPA), or a combination thereof.
In one embodiment of the present invention, the (meth) acrylate monomer having a functionality of less than 3 may be a (meth) acrylate monomer having a functionality of 1 or 2 and a molecular weight of less than 500. Suitable (meth) acrylate monomers having a functionality of less than 3 for use in the present invention may be, for example, 2-ethylhexyl (meth) acrylate (2-ethylhexyl (meth) acrylate, 2-EH (M) A), 2-hydroxyethyl (meth) acrylate (2-hydroxyethyi (meth) acrylate, 2-HE (M) A), 3-hydroxypropyl (meth) acrylate (3-hydroxypropyl (meth) acrylate, 3-HP (M) A), 4-hydroxybutyl (meth) acrylate (4-hydroxybuytl (meth) acrylate, 4-HB (M) A), 2-butoxyethyl (meth) acrylate (2-butoxyethyi (meth) acrylate), 1,6-hexanediol di (meth) acrylate (1, 6-cyclohexanediol (meth) acrylate, trimethylolpropane (meth) acetal (methyl methacrylate), ctf (m) a), 2-phenoxyethyl (meth) acrylate (2-phenoxyethyl (meth) acrylate, phe (m) a), tetrahydrofuran (meth) acrylate (tetrahydrofuran (meth) acrylate, thf (m) a, lauryl (meth) acrylate, l (m) a, diethylene glycol di (meth) acrylate, degd (m) a, dipropylene glycol di (meth) acrylate (dpgd (m) a), tripropylene glycol di (meth) acrylate (tripropylene glycol di (meth) acrylate, tpgd (m) a), isobornyl (meth) acrylate (isobornyl) acrylate, or combinations thereof. The (meth) acrylate monomer having a functionality of less than 3 is preferably 1,6-hexanediol diacrylate (HDDA), cyclotrimethylolpropane formal acrylate (CTFA), 2-phenoxyethyl acrylate (PHEA), or a combination thereof.
Suitable initiators in the acrylic binder resin of the present invention may be those generally known in the art, and are not particularly limited, and for example, acetophenone type initiators, diphenyl ketone type initiators, phenyl acetophenone type initiators, dibenzoyl type initiators, bifunctional α -hydroxy ketone type initiators or acylphosphine oxide type initiators, etc. may be used. The aforementioned initiators may be used alone or in admixture.
In other embodiments of the present invention, additives such as antistatic agents, coloring agents, flame retardants, antibacterial agents, ultraviolet absorbers, antioxidants, surface modifiers, and the like may be added to the acrylic binder resin as needed.
Other optical function layers, such as a low refractive layer, may also be selectively coated on the antiglare film of the present invention to provide antireflection properties.
The preparation method of the anti-dazzle film comprises the steps of uniformly mixing polyurethane (methyl) acrylate oligomer with the functionality of 6-15, a (methyl) acrylate monomer with the functionality of not less than 3, a (methyl) acrylate monomer with the functionality of less than 3, an initiator and a proper solvent to form a solution of acrylic acid adhesive resin; adding organic microparticles, silicon dioxide nanoparticles, a flatting agent, an additive, an organic solvent and the like into a solution of acrylic binder resin, and uniformly mixing to form an anti-dazzle solution; and (3) coating the anti-dazzle solution on a transparent substrate, drying the anti-dazzle solution coated on the transparent substrate, and then forming a cured anti-dazzle hard coating on the transparent substrate through radiation curing or electron beam curing to obtain the anti-dazzle film.
The solvent used in the method for producing an antiglare film of the present invention may be an organic solvent generally used in this technical field, for example, ketones, aliphatic or cycloaliphatic hydrocarbons, aromatic hydrocarbons, ethers, esters, or alcohols. One or more organic solvents may be used in the solution of the binder resin, and suitable solvents may be, 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, isopropyl alcohol, n-butanol, isobutyl alcohol, cyclohexanol, diacetone alcohol, propylene glycol methyl ether acetate, tetrahydrofuran, or the like, but are not limited thereto.
The method for applying the antiglare solution may be a coating method generally used in the art, for example, a roll coating method, a knife coating method, a dip coating method, a roll coating method, a spin coating method, a slit coating method, and the like.
The antiglare film of the present invention can be combined with other functional optical films to form a composite optical film. A functional optical film such as a polarizing plate may be used, wherein the polarizing plate may be located on the other side of the transparent substrate of the antiglare film with respect to the cured antiglare hard coat layer.
According to the anti-glare film disclosed in the above embodiment of the present invention, in another embodiment, the present invention further provides a polarizing plate comprising a polarizing element, wherein the anti-glare film disclosed in the above embodiment of the present invention is provided on a surface of the polarizing element.
The following examples are intended to further illustrate the invention, but the invention is not limited thereto.
Examples
Preparation example 1: preparation of acrylic Binder resin I
42 g of urethane acrylate (functionality 6, molecular weight about 1200, viscosity about 30,000cps (25 ℃), from IGM, taiwan), 4.5 g of pentaerythritol triacrylate (PETA), 12 g of dipentaerythritol hexaacrylate (DPHA), 3 g of cyclotrimethylolpropane formal acrylate (CTFA), 4 g of polymerization initiator (Chemcure-481, available from the bridge industry, taiwan), 24.5 g of Ethyl Acetate (EAC) and 10 g of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a solution of acrylic adhesive resin I having a solid content of 65.5%.
Preparation example 2: preparation of acrylic Binder resin II
40.5 grams of urethane acrylate oligomer (functionality 9, molecular weight about 2,000, viscosity about 86,000cps (25 ℃), from Allnex, USA), 4.5 grams of pentaerythritol triacrylate (PETA), 10.5 grams of dipentaerythritol hexaacrylate (DPHA), 4.5 grams of hexanediol diacrylate (HDDA), 1.5 grams of 2-phenoxyethyl acrylate (PHEA), 3.5 grams of polymerization initiator (Chemcure-481, from the constant bridge industry, Taiwan), 0.5 grams of polymerization initiator (TR-PPI-One, from Strong New Material, hong Kong), 24.5 grams of Ethyl Acetate (EAC) and 10 weight percent of n-butyl acetate (nBAC) were mixed and stirred for 1 hour to form a solution of acrylic binder resin II with a solids content of 65.5%.
Example 1
199 g of a binder resin I, 7.4 g of a hydrophobically modified silica nanoparticle dispersion sol (NanoBYK-3650, average primary particle size of 20nm, solid content of 31%, solvent propylene glycol methyl ether acetate/propylene glycol monomethyl ether solution, available from BYK, Germany), 5.3 g of a polyether modified polydimethylsiloxane flow flattening agent (BYK-333, solid content of 10%, solvent ethyl acetate, available from BYK, Germany), 19.6 g of polystyrene particles (SSX-303ABE, average particle size of 3.0 μm, refractive index of 1.59, available from product of hydration, Japan), 48.3 g of propylene glycol methyl ether acetate (PMA) and 100 g of n-propyl acetate (nPAC) were mixed and stirred for 1 hour to form an antiglare solution.
This antiglare solution was coated on one of the surfaces of a polyethylene terephthalate (PET) substrate having a thickness of 80 μm, dried, and then light-cured under a nitrogen atmosphere at a radiation dose of 80mJ/cm2 of a UV lamp to form a cured antiglare hard coat layer having a thickness of 4.2 μm on one of the surfaces of the PET substrate, and an antiglare film was obtained.
The obtained antiglare film was evaluated for transmittance, total haze, internal haze, surface haze, gloss, clarity and antiglare property by the optical measurement method described later, and the results are shown in table 1, and the scratch resistance measurement, hardness measurement, and adhesion to the substrate were performed, and the test results are shown in table 2.
Example 2
199 g of binder resin II, 0.5 g of hydrophobically modified silica nanoparticle dispersion sol (NanoBYK-3650, average primary particle size 20nm, solid content 31%, solvent propylene glycol methyl ether acetate/propylene glycol monomethyl ether solution, available from BYK, Germany), 5.2 g of polyether modified polydimethylsiloxane flow agent (BYK-333, solid content 10%, solvent ethyl acetate, available from BYK, Germany), 16.3 g of polystyrene particles (XX-35IK, average particle size 3.8 μm, refractive index 1.59, available from product of hydration, Nissan), 37.4 g of Ethyl Acetate (EAC) and 112 parts by weight of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to form an anti-glare solution.
The anti-glare solution was coated on one surface of a polyethylene terephthalate (PET) substrate having a thickness of 80 μm, dried, and then photo-cured under a nitrogen atmosphere at a radiation dose of 80mJ/cm2 by a UV lamp to form a cured anti-glare hard coating layer having a thickness of 5.0 μm on one surface of the PET substrate, and an anti-glare film was obtained.
The obtained antiglare film was subjected to the test as in example 1, and the results are shown in tables 1 and 2.
Example 3
212 g of a binder resin II, 21.6 g of a silica nanoparticle dispersion sol (MEK-9130X, average primary particle size of 12nm, average secondary particle size of 90 to 100nm, solid content of 30%, butanone as a solvent, purchased from Unionions, Taiwan, China), 5.4 g of a polyether modified polydimethylsiloxane leveling agent (BYK-307, solid content of 10%, ethyl acetate as a solvent, purchased from BYK, Germany), 16.2 g of polystyrene particles (XX-29IK, average particle size of 3.5 μm, refractive index of 1.59, purchased from a hydrated product, Nippon), 39.45 g of n-butyl acetate (nBAC), 39.45 g of n-propyl acetate (nPAC) and 72.5 g of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to form an antiglare solution.
This antiglare solution was applied to one surface of a polyethylene terephthalate (PET) substrate having a thickness of 80 μm, dried, and then photo-cured under a nitrogen atmosphere with a UV lamp at a radiation dose of 80mJ/cm2 to form a cured antiglare hard coat layer having a thickness of 4.4 μm on one surface of the substrate, and an antiglare film was obtained.
The obtained antiglare film was subjected to the test as in example 1, and the results are shown in tables 1 and 2.
Example 4
199 parts by weight of a binder resin II, 3.6 g of a hydrophobically modified silica nanoparticle dispersion sol (NanoBYK-3650, average primary particle size 20nm, solid content 31%, solvent propylene glycol methyl ether acetate/propylene glycol methyl ether solution, purchased from BYK, Germany), 5.3 g of a polyether modified polydimethylsiloxane leveling agent (BYK-333, solid content 10%, solvent ethyl acetate, purchased from BYK, Germany), 16.3 g of polystyrene particles (SSX-303ABE), 36.8 g of Ethyl Acetate (EAC) and 112 g of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to be uniformly dispersed, and then an anti-glare solution was formed.
This antiglare solution was coated on one surface of a polyethylene terephthalate (PET) substrate having a thickness of 80 μm, dried, and then photo-cured under a nitrogen atmosphere with a UV lamp at a radiation dose of 80mJ/cm2 to form a cured antiglare hard coat layer having a thickness of 4.3 μm on one surface of the PET substrate, and an antiglare film was obtained.
The obtained antiglare film was subjected to the test as in example 1, and the results are shown in tables 1 and 2.
Example 5
212 g of a binder resin II, 32.4 g of a silica nanoparticle dispersion sol (MEK-9130X, average primary particle diameter of 12nm, average secondary particle diameter of 90 to 100nm, solid content of 30%, butanone as a solvent, purchased from Unionions, Taiwan, China), 5.4 g of a polyether-modified polydimethylsiloxane leveling agent (BYK-307, solid content of 10%, ethyl acetate as a solvent, purchased from BYK, Germany), 13 g of polystyrene particles (XX-31IK, average particle diameter of 3.8 μm, refractive index of 1.59, purchased from a hydrated product, Japan), 39.45 g of n-butyl acetate (nBAC), 39.45 g of n-propyl acetate (nPAC), and 72.5 g of methyl isobutyl ketone (MIBK) were mixed and stirred for 1 hour to be uniformly dispersed, and an antiglare solution was formed.
The antiglare solution was coated on one surface of a polyethylene terephthalate (PET) substrate having a thickness of 80 μm, dried, and then photo-cured under a nitrogen atmosphere with a UV lamp at a radiation dose of 80mJ/cm2 to form a cured antiglare hard coat layer having a thickness of 4.6 μm on one surface of the PET substrate, and an antiglare film was obtained.
The obtained antiglare film was subjected to the test as in example 1, and the results are shown in tables 1 and 2.
Optical measurement method
The antiglare films obtained in the above examples were measured optically according to the measurement method of the Japanese Industrial Standard (JIS).
Light transmittance measurement: measured by a measurement method according to JIS K7361 using an NDH-2000 haze meter (manufactured by Nippon Denshoku industries Co., Ltd.).
Measurement of haze: the haze was evaluated according to the description of JIS K7136 using NDH-2000 (manufactured by Nippon Denshoku industries Co., Ltd.).
Measurement of internal haze and surface haze: in a state in which a triacetylcellulose substrate (T40UZ, thickness 40 μm, fuji film corporation) was attached to the surface of the antiglare film using a transparent optical adhesive, thereby flattening the uneven surface of the antiglare film, the haze was evaluated according to the description of JIS K7136 using an NDH-2000 haze meter (manufactured by nippon electrochrome industry corporation) to obtain a total haze value and an inner haze value, and then the inner haze value was subtracted from the total haze value to obtain a surface haze value.
Measurement of gloss: the antiglare film was bonded to a black acrylic plate, measured using a BYK Micro-Gloss glossmeter according to the description of JIS Z8741, and Gloss values at viewing angles of 20, 60, and 85 degrees were selected.
Measurement of resolution Using a SUGA ICM-IT image resolution instrument, measurement was performed in accordance with the description of JIS K7374, and values measured at slits of 0.125mm, 0.25mm, 0.50mm, 1.00mm and 2.00mm were added up.
Measurement of anti-glare property: the antiglare film was bonded to a black acrylic plate, and the antiglare property of the antiglare film was evaluated in the following 5 grades by reflecting 2 daylight lamp light on the surface of the antiglare film and visually checking the degree of blooming of the daylight lamp. Lv.1: 2 separated fluorescent tubes can be clearly seen, and the outline can be clearly distinguished to be linear;
lv.2: the 2 separated fluorescent tubes can be clearly seen, but the outline is slightly blurred;
lv.3: 2 separated fluorescent tubes can be seen, the outline can be seen in a fuzzy way, but the shape of the fluorescent tubes can be distinguished;
lv.4: 2 fluorescent tubes can be seen, but the shapes can not be distinguished;
lv.5: the separated 2 fluorescent tubes cannot be seen, and the shape thereof cannot be distinguished.
TABLE 1 optical measurement results of the antiglare films of examples 1 to 5:
method for measuring scratch resistance, hardness and adhesion with substrate
Measurement of scratch resistance: on the surface of the antiglare film, using #0000 steel wool, rubbing was performed 10 times back and forth under a rubbing load of 250gf/cm2, and thereafter, whether or not scratches were left on the surface of the antiglare layer was observed with the eyes
Measuring the pencil hardness: the surface of the antiglare layer was visually observed for the occurrence of scratches under five tests using a mechanical pencil hardness tester with a pencil having a Mitsubishi pencil standard hardness of 2H in accordance with JIS K-5400. If no scratch is generated, the measurement result is marked with "0/5".
Measurement of adhesion: the adhesion measurement was carried out using a hundred-grid knife in accordance with the description of JIS K5600-5-6. The measurement method is to scratch 10x10 grids of 1mmx1mm on the surface of the anti-dazzle film by using a hundred grid knife, then use a standard test tape for sticking and tearing, and check the number of the grids which are not peeled.
TABLE 2 results of measurement of scratch resistance, pencil hardness, and adhesiveness of the antiglare films of examples 1 to 5
As is apparent from tables 1 and 2, the anti-glare films obtained in examples 1 to 5 of the present invention have not only good anti-glare properties but also gloss at a viewing angle of 60 degrees to provide excellent display quality at a wide viewing angle, and have good adhesion to a polyethylene terephthalate (PET) substrate, and the surface of the anti-glare film provides sufficient hardness and excellent scratch resistance.
In summary, the surface haze of the anti-glare film and the polarizing plate having the same disclosed in the present invention can effectively reduce the flicker on the display surface and the internal haze of the anti-glare layer can be properly destroyed, so as to provide satisfactory anti-glare properties and achieve high definition, high resolution, no flicker, and good visibility. The anti-glare film and the polarizing plate with the anti-glare film disclosed by the invention also provide excellent display quality at a wide viewing angle, and the anti-glare property at the wide viewing angle is used for increasing the visibility of the whole display. The anti-dazzle film and the polarizing plate with the anti-dazzle film disclosed by the invention have good adhesion between the anti-dazzle layer and the base material.
The present invention is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (19)
1. An antiglare film, characterized by comprising:
a polyethylene terephthalate (PET) substrate; and
a cured antiglare hard coat layer formed on a surface of the substrate, wherein the cured antiglare hard coat layer comprises:
75 to 90 parts by weight of an acrylic binder resin;
0.01 to 10 parts by weight of silica nanoparticles;
5 to 20 parts by weight of organic fine particles; and
0.05 to 2 parts by weight of a leveling agent;
the antiglare film has a total haze of 35% to 50% and a surface haze of 10% to 15%, and a gloss at a viewing angle of 60 degrees of 30% to 50%.
2. The antiglare film of claim 1, wherein the antiglare film has a total haze of 40% to 50%, an internal haze of 27% to 40%, and a surface haze of 10% to 13%.
3. The antiglare film of claim 1, wherein the organic fine particles have an average particle diameter of 2 μm to 6 μm.
4. The antiglare film of claim 2, wherein the organic fine particles have an average particle diameter of 2 μm to 5 μm.
5. The antiglare film of claim 3, wherein the silica nanoparticles have a primary particle diameter (d50) of 5nm to 30nm and a secondary particle diameter (d50) of 50nm to 120 nm.
6. The antiglare film of claim 1, wherein the acrylic binder resin is used in an amount of preferably 80 to 90 parts by weight.
7. The antiglare film of claim 1, wherein the organic fine particles are used in an amount of preferably 7 to 15 parts by weight.
8. The antiglare film of claim 1 wherein the silica nanoparticles are preferably used in an amount of 0.05 to 7 parts by weight.
9. The antiglare film of claim 1, wherein the leveling agent is used in an amount of from 0.1 to 1 part by weight.
10. The antiglare film according to claim 1, wherein the organic fine particles are polymethyl methacrylate resin fine particles, polystyrene resin fine particles, styrene-methyl methacrylate copolymer fine particles, polyethylene resin fine particles, epoxy resin fine particles, silicone resin fine particles, polyvinylidene fluoride resin fine particles, or polyvinyl fluoride resin fine particles, the surfaces of which are hydrophobic-treated or hydrophilic-treated.
11. The antiglare film of claim 1, wherein the organic fine particles have a refractive index of 1.40 to 1.60.
12. The antiglare film of claim 1, wherein the cured antiglare hard coat layer has a thickness of 3 μm to 9 μm.
13. The antiglare film of claim 1, wherein the leveling agent is a polyether-modified polysiloxane-based leveling agent.
14. The antiglare film of claim 1, wherein said acrylic binder resin comprises a (meth) acrylate composition and an initiator, said (meth) acrylate composition comprising:
35 to 50 parts by weight of a urethane (meth) acrylate oligomer having a functionality of 6 to 15;
12 to 20 parts by weight of a (meth) acrylate ester 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;
wherein the molecular weight of the urethane (meth) acrylate oligomer is 1,000 to 4,500.
15. The antiglare film of claim 14, wherein the urethane (meth) acrylate oligomer having a functionality of 6 to 15 is an aliphatic urethane (meth) acrylate oligomer.
16. The antiglare film of claim 14, wherein the (meth) acrylate monomer having a functionality of 3 to 6 is at least one selected from the group consisting of pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dpp (m) a, dipentaerythritol hexa (meth) acrylate, dph (m) a, trimethylolpropane tri (meth) acrylate, tmpt (m) a, ditrimethylolpropane tetra (meth) acrylate, dtmpt (m) a, and pentaerythritol tri (meth) acrylate, pet (pet) a, or a combination thereof.
17. The antiglare film of claim 14, wherein the (meth) acrylate monomer having a functionality of less than 3 is selected from the group consisting of 2-ethylhexyl (meth) acrylate, 2-eh (m) a, 2-hydroxyethyl (meth) acrylate, 2-he (m) a, 3-hydroxypropyl (meth) acrylate, 3-hp (m) a, 4-hydroxybutyl (meth) acrylate (4-hydroxybutyl (meth) acrylate, 4-hb (m) a), 2-butoxyethyl (meth) acrylate (2-butoxybutyl (meth) acrylate), 1,6-hexanediol di (meth) acrylate (1,6-hexanediol di (meth) acrylate, a, and m, Cyclic trimethylolpropane formal (meth) acrylate (ctf (m) a), 2-phenoxyethyl (meth) acrylate (2-phenoxyethyl) acrylate, phe (m) a), tetrahydrofuran (meth) acrylate (tetrahydrofuran (meth) acrylate, thf (m) a), lauryl (meth) acrylate (lauryl (meth) acrylate, l (m) a), diethylene glycol di (meth) acrylate (degd (m) a), dipropylene glycol di (meth) acrylate (lauryl di (meth) acrylate, dpgd (m) a), tripropylene glycol di (meth) acrylate (triethylene glycol) acrylate (tpm) a, and combinations thereof.
18. The antiglare film of claim 14, wherein said initiator is at least one selected from the group consisting of acetophenone initiators, benzophenone initiators, acetophenone initiators, dibenzoyl initiators, difunctional α -hydroxy ketone initiators, and acylphosphine oxide initiators, or a combination thereof.
19. A polarizing plate comprising a polarizing element, wherein at least one surface of the polarizing element has the antiglare film according to any one of claims 1 to 18.
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| TWI789017B (en) * | 2021-09-17 | 2023-01-01 | 明基材料股份有限公司 | High-haze anti-glare film and high-haze anti-glare anti-reflection film |
| CN113912893B (en) * | 2021-12-15 | 2022-03-08 | 苏州奥美材料科技有限公司 | Colorful film and preparation method thereof |
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| CN111366994A (en) | 2020-07-03 |
| CN112540421B (en) | 2023-08-15 |
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