WO2024005382A1 - 하드코팅 필름 및 이를 적용한 윈도우 및 화상 표시 장치 - Google Patents
하드코팅 필름 및 이를 적용한 윈도우 및 화상 표시 장치 Download PDFInfo
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- WO2024005382A1 WO2024005382A1 PCT/KR2023/007381 KR2023007381W WO2024005382A1 WO 2024005382 A1 WO2024005382 A1 WO 2024005382A1 KR 2023007381 W KR2023007381 W KR 2023007381W WO 2024005382 A1 WO2024005382 A1 WO 2024005382A1
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- hard coating
- coating layer
- coating film
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- acrylate
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/38—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/78—Coatings specially designed to be durable, e.g. scratch-resistant
Definitions
- the present invention relates to a hard coating film and a window and image display device using the same.
- image display devices such as liquid crystal display (LCD) devices or organic light emitting display (OLED) devices
- LCD liquid crystal display
- OLED organic light emitting display
- the image display device is widely applied to various smart devices characterized by portability, including smart phones and tablet PCs, as well as various wearable devices.
- Such a flexible display requires a glass base layer having physical properties such as high transparency, hardness, and bending characteristics.
- Republic of Korea Patent Publication No. 10-1408511 reinforces the thin glass by providing a resin layer with a specific shrinkage stress on one or both sides of the thin glass, significantly preventing the propagation and fracture of cracks in the thin glass, thereby improving bendability and flexibility. This provides an excellent transparent substrate.
- the purpose of the present invention is to provide a hard coating film of excellent quality that prevents scattering of fragments when broken.
- the purpose is to provide a window and image display device that has high hardness when applying the hard coating film and has excellent scratch resistance, anti-fouling, abrasion resistance, chemical resistance, crush resistance, anti-shattering properties, adhesion, and flexibility. Do it as
- the present invention is to be formed on display glass, and includes a first hard coating layer containing a silane or siloxane compound and having a Vickers hardness of 20 kgf/mm 2 or less; and a second hard coating layer formed on the first hard coating layer, comprising a fluorine-based UV curable functional group-containing compound, and having a thickness of 3 to 15 ⁇ m.
- the display glass may be UTG (Ultra Thin Glass).
- the display glass, the first hard coating layer, and the second hard coating layer may be formed by directly contacting each other without including a separate layer.
- the fluorine-based UV-curable functional group-containing compound may have 1 to 6 UV-curable functional groups.
- any one of the first hard coating layer and the second hard coating layer may be manufactured from a composition containing at least one member selected from the group consisting of a photopolymerizable compound, an initiator, and a solvent.
- the photopolymerizable compound may further include an inorganic nano-filler.
- any one of the first hard coating layer and the second hard coating layer may further include an additive.
- the additive may include one or more selected from the group consisting of a leveling agent, an ultraviolet stabilizer, and a heat stabilizer.
- the present invention may be applied to flexible displays.
- the present invention glass for display; And it relates to a window including the hard coating film formed on the display glass.
- the present invention relates to an image display device including the window.
- the hard coating film according to the present invention and the window and image display device to which it is applied have a pencil hardness of 3H or more and are excellent in scratch resistance, anti-fouling, abrasion resistance, chemical resistance, crush resistance, anti-scattering, adhesion, and flexibility. When applied to a flexible display, device reliability may be improved.
- the hard coating film according to the present invention does not include a separate substrate between the glass and the hard coating layer, but is formed by direct contact, so the process for bonding each substrate layer can be omitted, simplifying the manufacturing process compared to the prior art. You can.
- Figure 1 shows a laminated structure of display glass on which a hard coating film is laminated according to an embodiment of the present invention.
- the present invention is to be formed on the display glass, and includes a first hard coating layer containing a silane or siloxane compound and having a Vickers hardness of 20 kgf/mm 2 or less; and a second hard coating layer formed on the first hard coating layer, comprising a fluorine-based UV-curable functional group-containing compound, and having a thickness of 3 to 15 ⁇ m, a hard coating film suitable for use in a flexible display, and a window using the same. and an image display device.
- the terms used in this specification are for describing embodiments and are not intended to limit the invention. As used herein, singular forms also include plural forms unless specifically stated otherwise in the context.
- the “hard coating layer” used in this specification may mean at least one hard coating layer among a first hard coating layer and a second hard coating layer.
- substantially can be interpreted to include not only physically completely identical or identical, but also within the error range of measurement or manufacturing process, for example, error range of 0.1%. It can be interpreted as follows.
- Figure 1 shows a laminated structure of display glass on which a hard coating film is laminated according to an embodiment of the present invention.
- the laminate 100 of the present invention is a display glass 110 as shown in Figure 1. ;
- it may have a structure in which a second hard coating layer 120b is formed on the first hard coating layer, that is, on the outermost layer.
- the hard coating film of the present invention can have both hardness and flexibility in order to be applied to a window for a flexible display.
- the display glass is intended to replace the existing glass substrate and support the hard coating layer 120 and other substrates or panels to be described later, and may be made of either thin glass or curved glass for the display of electronic devices.
- the thin glass may include flat glass and flexible glass.
- the display glass 110 may be made of UTG (ultra thin glass).
- UTG ultra thin glass
- UTG is a component made of ultra-thin tempered glass used in display cover windows. It has high transparency and a thickness of about 10 to 100 ⁇ m, allowing for flexible folding.
- “transparent” means that the transmittance of visible light is 70% or more or 80% or more, but is not limited thereto.
- the display glass 110 may include an additional base layer, such as a hard coating layer 120, which will be described later, to ensure durability.
- a hard coating layer 120 which will be described later, to ensure durability.
- an adhesive layer or an adhesive layer is included to form or bond a base layer, but according to the hard coating film according to the present invention, it does not include a separate base layer for bonding the hard coat layer, but is formed by direct contact. Due to this feature, the manufacturing process can be simplified compared to the conventional laminate.
- the hard coating film of the present invention includes a hard coating layer, and may preferably include a first hard coating layer and a second hard coating layer. More specifically, the hard coating film of the present invention is to be formed on display glass, and includes a first hard coating layer containing a silane or siloxane compound and having a Vickers hardness of 20 kgf/mm 2 or less; and a second hard coating layer formed on the first hard coating layer, including a fluorine-based UV curable functional group-containing compound, and having a thickness of 3 to 15 ⁇ m.
- the hard coating layer of the present invention may include a first hard coating layer 120a and a second hard coating layer 120b, as shown in FIG. 1.
- the first hard coating layer 120a contains a silane or siloxane compound and has a Vickers hardness of 20 kgf/mm 2 or less. As the Vickers hardness satisfies the above range, the window It serves to prevent fragments from scattering when broken.
- the second hard coating layer 120b is exposed to the surface to provide anti-fouling properties and the function of protecting the film.
- the second hard coating layer 120b contains a fluorine-based UV-curable functional group-containing compound and has a thickness of 3 to 15 ⁇ m.
- the first hard coating layer 120a is formed on the display glass 110, and the second hard coating layer 120b is formed on the first hard coating layer 120a, that is, a hard coating film. It can be formed on the outermost side of.
- the first hard coating layer 120a ensures adhesion between substrates and provides impact resistance without the need for a separate substrate layer such as an adhesive layer.
- the display glass 110 may be made of UTG (ultra thin glass) as described above, and the display glass 110, the first hard coating layer 120a, and The second hard coating layer 120b may be formed by directly contacting each other without including a separate layer.
- UTG ultra thin glass
- first hard coating layer (120a) and the second hard coating layer (120b) may each independently be manufactured from a hard coating composition containing at least one member selected from the group consisting of a photopolymerizable compound, a solvent, and an initiator.
- the composition may further include one or more additives selected from the group consisting of leveling agents, ultraviolet stabilizers, and heat stabilizers, if necessary.
- the first hard coating layer may be manufactured from a hard coating composition containing a silane or siloxane compound, a photopolymerizable compound, an initiator, and a solvent.
- the second hard coating layer may be manufactured from a hard coating composition containing a fluorine-based UV-curable functional group-containing compound, a photopolymerizable compound, an initiator, and a solvent.
- the siloxane compound included in the first hard coating layer 120a of the present invention includes a compound having a Si-O-Si bond.
- the Si-O bonding force of the siloxane compound is stronger than the CC bond, so not only can it have excellent impact resistance properties, but it can also provide excellent adhesion to other adjacent substrates.
- the bond length of Si-O is longer than that of CC, and the bond angle of Si-O-Si is 143°, which is larger than the bond angle of 110° of CCC bond, so it has excellent flexibility against deformation. For this reason, the silane or siloxane compound of the present invention has an excellent elastic recovery rate compared to carbon materials.
- the siloxane compound may be in the form of -(R 2 SiO)-, in which two organic groups are bonded to a silicon element, or in the form of -(RSiO 1.5 )-, in which one organic group is bonded to a silicon element.
- Examples of the -(R 2 SiO)- type include polydimethylsiloxane (PDMS).
- Examples of the -(RSiO 1.5 )- type include caged silsesquioxane, partially caged silsesquioxane, ladder-type silsesquioxane, and random silsesquioxane.
- the organic group may have a (meth)acrylic group functional group or an epoxy group functional group that can be photocured.
- the silane compound includes, but is not limited to, a compound having an X-Si-(OR) 3 bond.
- an example of the X-Si-(OR) 3 type may include a silane coupling agent.
- X of the silane compound is a reactive group that chemically bonds with organic materials and may have a photocurable (meth)acrylic group functional group or an epoxy group functional group.
- R of the silane or siloxane compound refers to any organic group and includes organic groups of known silane or siloxane compounds without limitation.
- the silane or siloxane compound may be included in an amount of 1 to 10 parts by weight, preferably 3 to 10 parts by weight, based on 100 parts by weight of the hard coating composition.
- the hard coating layer formed from the hard coating composition has good adhesion between substrates, can provide flexibility to the film substrate layer, and does not break into fragments when damaged by frequent folding or external impact. This can prevent it from scattering.
- the fluorine-based UV-curable functional group-containing compound included in the second hard coating layer 120b of the present invention is an ingredient that imparts antifouling and wear resistance, and must contain fluorine and is not particularly limited as long as it has a UV-curable functional group. .
- the fluorine-based UV-curable functional group-containing compound preferably has 1 to 6 UV-curable functional groups.
- the scope of the present invention is not limited to these, and any material that has a UV-curable functional group and contains a fluorine group can be applied. do.
- the photopolymerizable compound used to form the hard coating layer of the present invention contains a photopolymerizable functional group and may be a photopolymerizable monomer, a photopolymerizable oligomer, etc., and may be, for example, a radically photopolymerizable compound.
- Photopolymerizable monomers are commonly used photocurable functional groups, for example, monomers used in the art having unsaturated groups such as (meth)acryloyl group, vinyl group, styryl group, and allyl group in the molecule can be used without limitation. More specifically, examples include monofunctional and/or polyfunctional (meth)acrylates. These can be used individually or in combination of two or more types.
- (meth)acryl- refers to “methacryl-”, “acryl-”, or both.
- (meth)acrylate monomers include (meth)acrylic acid esters, such as trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, glycerol tri(meth)acrylate, and tris(2-hyde).
- Monomers having a trifunctional or less (meth)acryloyl group such as acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol hydroxypenta(meth)acrylate, pentaerythritol tetra(meth)acrylate, Ditrimethylolpropane tetra(meth)acrylate, etc. can be mentioned. These can be used individually or in combination of two or more types.
- the photopolymerizable oligomer may be, for example, one or more selected from the group consisting of epoxy (meth)acrylate, urethane (meth)acrylate, and polyester (meth)acrylate, specifically urethane (meth)acrylate. It can be used by mixing polyester (meth)acrylate, or by mixing two types of polyester (meth)acrylate. It is preferable to include urethane (meth)acrylate oligomer in order to improve the scratch resistance and hardness of the cured product and increase the elastic modulus of the hard coating layer.
- the urethane (meth)acrylate can be produced by reacting a polyfunctional (meth)acrylate having a hydroxy group in the molecule and a compound having an isocyanate group in the presence of a catalyst according to a method known in the art.
- polyfunctional (meth)acrylate having a hydroxy group in the molecule examples include 2-hydroxyethyl (meth)acrylate, 2-hydroxyisopropyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate. , caprolactone ring-opened hydroxyacrylate, pentaerythritol tri/tetra (meth)acrylate mixture, and dipentaerythritol penta/hexa (meth)acrylate mixture.
- compounds having an isocyanate group include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane, 1,8-diisocyanatooctane, 1,12-diisocyanatododecane, and 1,5-diisocyanatododecane.
- the urethane (meth)acrylate oligomer may be a compound containing two or more substituents and (meth)acrylic groups each represented by the following formula (1) in the molecule.
- the urethane (meth)acrylate oligomer may be produced by reacting 1 mol of diisocyanate represented by the following formula (2) with 2 mol of an active hydrogen-containing polymerizable unsaturated compound.
- R 1 and R 2 are each independently a substituent containing a (meth)acryloyl group derived from an active hydrogen-containing polymerizable unsaturated compound, and R 3 is a divalent substituent derived from diisocyanate.
- urethane (meth)acrylate oligomers include reaction of 2-hydroxyethyl (meth)acrylate and 2,4-tolylene diisocyanate, 2-hydroxyethyl (meth)acrylate and isophorone diisocyanate.
- Polyester (meth)acrylate can be produced by reacting polyester polyol and acrylic acid according to methods known in the art.
- Polyester (meth)acrylates include, for example, polyester acrylate, polyester diacrylate, polyester tetraacrylate, polyester hexaacrylate, polyester pentaerythritol triacrylate, polyester pentaerythritol tetraacrylate. , and polyester pentaerythritol hexaacrylate, but is not limited to this.
- Photopolymerizable monomers and photopolymerizable oligomers can be used individually or in combination. When photopolymerizable monomers and photopolymerizable oligomers are used in combination, the workability and compatibility of the hard coating composition can be increased.
- the content ratio of the photopolymerizable monomer and the photopolymerizable oligomer is not particularly limited and may be appropriately selected considering the storage modulus, shrinkage force, and workability of the hard coating layer.
- the content ratio of the polymerizable oligomer to the polymerizable monomer is not particularly limited. It may be included in a ratio of (1:10) to (10:1). If the content ratio of the polymerizable oligomer to the polymerizable monomer is outside the above range, the storage modulus of the hard coating layer may decrease or the shrinkage force may increase, resulting in lower hardness and flexibility, which may cause curling.
- the content of the photopolymerizable compound is not particularly limited, but for example, may be included in an amount of 1 to 80 parts by weight, preferably 5 to 50 parts by weight, based on a total of 100 parts by weight of the hard coating composition. If the polymerizable compound is less than 1 part by weight, the elastic modulus of the hard coating layer is reduced, so cracks may easily occur in the hard coating layer when bending, and if it exceeds 80 parts by weight, the viscosity increases, the applicability decreases, and surface leveling is insufficient. This may cause problems with the exterior characteristics.
- the photopolymerizable compound can be used together with an inorganic nano-filler to improve hardness and scratch resistance.
- the inorganic nanofiller may generally be less than 100 nm in size, preferably 10 to 100 nm, and more preferably 10 to 50 nm.
- Representative inorganic nano fillers include, for example, silica, aluminum oxide particles, titanium oxide particles, or zinc oxide particles, and silica is preferably used.
- Silica may or may not have a photocurable group on its surface that can participate in a photoreaction.
- the inorganic nano filler can be added by appropriately adjusting the content within a range that does not impair the effect of the present invention.
- the solvent is capable of dissolving or dispersing the above-mentioned composition and can be used without limitation as long as it is known as a solvent for the composition for forming a coating layer in the art.
- Solvents that can be used are alcohol-based (methanol, ethanol, isopropanol, butanol, methylcellusorb, ethylsolusorb, etc.), ketone-based (methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, dipropyl ketone, Cyclohexanone, etc.), acetates (ethyl acetate, propyl acetate, n-butyl acetate, tertiary-butyl acetate, methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, Propylene glycol monopropyl ether acetate, methoxybutyl acetate, methoxypentyl acetate, etc.), hexane type (hexan
- This solvent is used in an amount of 10 to 95 parts by weight based on 100 parts by weight of the total hard coating composition. If the content of the solvent is less than the above content, the viscosity is high, which not only reduces workability, but also makes it impossible to sufficiently progress the swelling of the base film. Conversely, if it exceeds the above range, the drying process takes a lot of time and is not economically feasible. Since there is a problem of dropping, use appropriately within the above range.
- the initiator can be used without limitation as long as it is used in the art.
- one or more types selected from the group consisting of hydroxyketones, aminoketones, hydrogen recovery type photoinitiators, and combinations thereof may be used.
- the photoinitiator includes 2-methyl-1-[4-(methylthio)phenyl]2-morpholinepropanone-1, diphenyl ketone, benzyldimethyl ketal, 2-hydroxy-2-methyl-1- Phenyl-1-one, 4-hydroxycyclophenylketone, 2,2-dimethoxy-2-phenyl-acetophenone, anthraquinone, fluorene, triphenylamine, carbazole, 3-methylacetophenone, 4-c.
- This photoinitiator is used in an amount of 0.1 to 10 parts by weight, preferably 1 to 5 parts by weight, based on 100 parts by weight of the hard coating composition. If the content is less than the above range, the curing speed of the composition is slow and non-curing occurs, resulting in poor mechanical properties. Conversely, if the content exceeds the above range, cracks may occur in the coating film due to overcuring.
- the hard coating composition used to form the hard coating layer according to the present invention may further include additives such as a leveling agent, ultraviolet stabilizer, and/or heat stabilizer.
- the leveling agent is an ingredient that provides smoothness and coating properties to the coating film.
- the leveling agent can be any leveling agent commonly used in the industry, and examples include silicone-based leveling agents, fluorine-based leveling agents, and acrylic polymer-based leveling agents. These can be used alone or in combination of two or more, but are not necessarily limited to these.
- the leveling agent may be included in an amount of 0.1 to 1 part by weight based on 100 parts by weight of the hard coating composition, but is not limited thereto.
- UV stabilizers are ingredients that block or absorb ultraviolet rays and prevent decomposition, discoloration, and crumbling of the hardened hard coating layer due to exposure to ultraviolet rays.
- the UV stabilizers include absorbers, quenchers, hindered amine light stabilizers (HALS), etc., which are classified according to their mechanism of action; Or, classified according to chemical structure: Phenyl Salicylates (absorbent), Benzophenone (absorbent), Benzotriazole (absorbent), Nickel Derivative (quencher), Radical Scavenger ; etc. can be used. These can be used alone or in combination of two or more types, and the type is not particularly limited as long as it is a UV stabilizer that does not significantly change the initial color of the hard coating layer.
- Heat stabilizers are commercially applicable products, for example, polyphenol-based primary heat stabilizers, phosphate-based and lactone-based secondary heat stabilizers can be used individually or in combination. These can be used alone or in combination of two or more types.
- the ultraviolet stabilizer and heat stabilizer can be used by appropriately adjusting the content at a level that does not affect ultraviolet curing properties, and specifically, it is preferably contained in an amount of 0.1 to 3 parts by weight based on a total of 100 parts by weight of the hard coating composition of the present invention.
- the additives can be added by appropriately adjusting the content within a range that does not impair the effect of the present invention.
- the hard coating layer may be manufactured through a method known in the art.
- the thickness of the first hard coating layer is not particularly limited and, for example, may be 5 to 100 ⁇ m, and the thickness of the second hard coating layer may be 3 to 15 ⁇ m, preferably 5 to 10 ⁇ m. . When the thickness is within the above range, superior hardness and flexibility can be exhibited.
- the hard coating film according to an embodiment of the present invention may be formed by applying a first hard coating composition on the display glass 110 to form a first hard coating layer 120a through drying and UV curing steps, and then After applying the second hard coating composition on the first hard coating layer 120a, the second hard coating layer 120b may be formed through the same hard contrast and UV curing steps as the first hard coating layer.
- the step of drying the hard coating film may be performed by a heating means such as a hot plate, hot air circulation furnace, or infrared furnace, and may be performed at a temperature of 50 to 150°C or 50 to 100°C.
- a heating means such as a hot plate, hot air circulation furnace, or infrared furnace, and may be performed at a temperature of 50 to 150°C or 50 to 100°C.
- actinic rays such as UV light of 50 to 1000 mJ/cm 2 , preferably 200 to 800 mJ/cm 2 are irradiated.
- the step of forming the first hard coating layer (120a) is performed by mild primary curing at a level of 50 to 600 mJ/cm 2
- the step of forming the second hard coating layer (120b) is performed by a strong light amount of 300 to 800 mJ/cm 2
- Light sources used for irradiation include low-pressure mercury lamps, high-pressure mercury lamps, ultra-high pressure mercury lamps, metal halide lamps, and argon gas lasers. In some cases, X-rays and electron beams can also be used.
- Embodiments of the present invention provide a window and an image display device including the above-described display glass and hard coating film.
- the above-described hard coating film or a laminate containing the same may be applied as a window or a window laminate, and at this time, at least one of a polarizing layer or a touch sensor layer may be laminated on one side of the window on which the hard coating film is formed.
- This window or window laminate can be applied as a window film formed on the outermost surface of an image display device.
- the hard coating film may be inserted into, for example, an image display device.
- the image display device includes various image display devices such as a liquid crystal display device, an electroluminescence display device, a plasma display device, and a field emission display device, and may be a flexible display device having flexibility and bending characteristics.
- the hard coating laminate according to embodiments of the present invention can be more effectively applied as a window or window laminate of the flexible display device.
- the flexibility and durability of the window are improved, and antistatic performance can be implemented. Accordingly, for example, the impact resistance and wear resistance of the flexible display device can be improved, and damage such as cracks and peeling can be prevented even when bending.
- bifunctional acrylate (Miwon Special Chemicals, UA5216), 4 parts by weight 14-functional acrylate (VISCOAT #1000, Osaka Yuki Chemical Co., Ltd.), 0.5 parts by weight 1-hydroxycyclohexyl phenyl ketone, 0.5 parts by weight silicone Additives (BYK, BYK-UV3530), 50 parts by weight of methyl ethyl ketone, and 5 parts by weight of an acrylic silane compound (Shin-Etsu Silicone, KBM-5803) were mixed using a stirrer and filtered using a PP filter to obtain the first solution.
- a hard coating composition was prepared.
- the first hard coating composition was prepared by mixing and filtering using a PP filter.
- a hard coating film was prepared by laminating the hard coating compositions of Preparation Examples 1 to 12 in the order shown in Tables 1 and 2 below.
- first hard coating layer on 50 ⁇ m thin glass
- the composition of each preparation example was applied using a No. 40 bar coater, and the solvent was dried at 90°C for 2 minutes.
- the dried film was irradiated with UV light at a light dose of 600 mJ/cm 2 to form a 25 ⁇ m first hard coating layer (HC1).
- the composition of the manufacturing example suitable for each example was applied on the formed first hard coating layer to form a second hard coating layer (HC2).
- the composition of each example was applied to the second hard coating composition using a No. 12 bar coater, and then the solvent was dried at 90°C for 2 minutes. Nitrogen was purged on the dried film and irradiated with UV light at a light dose of 600 mJ/cm 2 under nitrogen conditions to form a 7 ⁇ m second hard coating layer, thereby preparing the final laminated hard coating film.
- Comparative Example 6 the composition of Preparation Example 1 of the second hard coating layer was applied using a No. 3 bar coater, and then the solvent was dried at 90°C for 2 minutes. The dried film was purged with nitrogen and irradiated with UV light at a light dose of 600 mJ/cm 2 under nitrogen conditions to form a 1 ⁇ m second hard coating layer, thereby preparing the final laminated hard coating film.
- Comparative Example 7 the composition of Preparation Example 1 of the second hard coating layer was applied using a No. 25 bar coater, and then the solvent was dried at 90°C for 2 minutes. The dried film was purged with nitrogen and irradiated with UV light at a light dose of 600 mJ/cm 2 under nitrogen conditions to form a 20 ⁇ m second hard coating layer, thereby preparing the final laminated hard coating film.
- Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 structure HC2 Manufacturing example 1 Manufacturing Example 1 Manufacturing Example 1 Manufacturing example 1 Manufacturing example 1 Manufacturing example 2 Manufacturing example 2 Manufacturing example 2 HC1 Production example 3 Production example 4 Production example 5 Manufacturing example 6 Manufacturing example 7 Manufacturing example 5 Manufacturing example 7 Manufacturing example 9 Production example 10 glass glass glass glass glass glass glass glass HC2 thickness ( ⁇ m) 7 7 7 7 7 7 7 7 7 7 7 Transmittance 91.9 91.8 91.9 92 91.9 92.1 91.9 92.1 91.9 Scratch resistance O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O pencil hardness 3H 3H 3H 3H 3H 3H 3H 3H 3H antifouling 111 110 112 111 110 110 111 110 111 wear resistance 105 103 98 103 103 100 99 100 99 Chemical resistance 105 100 97 99 99 98 99 98 99 crush resistance O O O O O O O O O O O O O O O O O Shatterproof
- the transmittance of the coating film was measured using a Murakami haze meter HM-150N.
- the base film was bonded to the glass using a transparent adhesive so that the hard coating side was at the top, and scratch resistance was measured by reciprocating friction 10 times with a load of 500 g/cm 2 using steel wool (#0000).
- ⁇ When the measurement part is transmitted and reflected by a three-wavelength lamp and observed, no scratches are visible or less than 10 scratches are visible.
- the base film was fixed to the glass with the hard coating side facing upward, and the pencil hardness was measured under a 1kg load.
- the test was conducted 5 times with a pencil of the same hardness at a length of 1 cm, and the hardness that was OK more than 4 times was designated as pencil hardness.
- the contact angle of water was measured using a contact angle measuring instrument DSA100 from KRUSS.
- the liquid drop volume at room temperature was 3 ⁇ l.
- the case where the contact angle of water was 110° or more was selected as the contact angle acceptance criterion.
- the sample was placed so that the first hard coating layer was on top, and the Vickers hardness of the first hard coating layer against compression measured with a microload of 5 mN was measured using a nanoindenter (Fisher).
- a folding test was performed on the prepared hard coating film by placing the second hard coating layers in contact with each other and repeating the folding process 200,000 times so that the radius of curvature of the folded portion was 5 mm.
- the pencil hardness is 3H or more, scratch resistance, antifouling property, abrasion resistance, chemical resistance, While excellent results were shown in all evaluations of crush resistance, shatterproofness, adhesion, and flexibility, Comparative Examples 1 to 7, in which the hard coating layer deviates from the embodiments of the present invention, showed scratch resistance, stain resistance, abrasion resistance, chemical resistance, and crush resistance.
- One or more of the evaluation criteria of property, anti-shattering property, adhesion, and flexibility did not meet the present invention, so it did not exhibit physical properties suitable as a hard coating film for flexible displays.
- the hard coating film according to the present invention and the window and image display device to which it is applied have excellent physical properties in terms of durability when repeatedly folded, and especially have a scattering prevention effect when broken.
- the hard coating film according to the present invention and the window and image display device to which it is applied have a pencil hardness of 3H or more and are excellent in scratch resistance, anti-fouling, abrasion resistance, chemical resistance, crush resistance, anti-scattering, adhesion, and flexibility. When applied to a flexible display, device reliability may be improved.
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Abstract
Description
| 실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | 실시예7 | 실시예8 | 실시예9 | ||
| 구조 | HC2 | 제조예1 | 제조예1 | 제조예1 | 제조예1 | 제조예1 | 제조예2 | 제조예2 | 제조예2 | 제조예2 |
| HC1 | 제조예 3 | 제조예 4 | 제조예 5 | 제조예6 | 제조예7 | 제조예5 | 제조예7 | 제조예9 | 제조예10 | |
| 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | ||
| HC2두께 (㎛) |
7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | |
| 투과율 | 91.9 | 91.8 | 91.9 | 92 | 91.9 | 92.1 | 91.9 | 92.1 | 91.9 | |
| 내스크래치성 | O | O | O | O | O | O | O | O | O | |
| 연필경도 | 3H | 3H | 3H | 3H | 3H | 3H | 3H | 3H | 3H | |
| 방오성 | 111 | 110 | 112 | 111 | 110 | 110 | 111 | 110 | 111 | |
| 내마모성 | 105 | 103 | 98 | 103 | 103 | 100 | 99 | 100 | 99 | |
| 내약품성 | 105 | 100 | 97 | 99 | 99 | 98 | 99 | 98 | 99 | |
| 내눌림성 | O | O | O | O | O | O | O | O | O | |
| 비산방지성 | O | O | O | O | O | O | O | O | O | |
| 밀착성 | O | O | O | O | O | O | O | O | O | |
| 굴곡성 | O | O | O | O | O | O | O | O | O | |
| HC1 비커스 하드니스[kgf/mm2] | 1.1 | 3.1 | 6.3 | 12.4 | 16.8 | 6.3 | 16.8 | 13.2 | 12.1 | |
| 비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | 비교예6 | 비교예7 | ||
| 구조 | HC2 | 제조예2 | 제조예11 | 제조예1 | 제조예1 | - | 제조예1 | 제조예1 |
| HC1 | 제조예8 | 제조예6 | 제조예12 | - | 제조예6 | 제조예 4 | 제조예 4 | |
| 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | 글라스 | ||
| HC2 두께(㎛) | 7 | 7 | 7 | 7 | 7 | 1 | 20 | |
| 투과율 | 91.9 | 91.9 | 92 | 91.8 | 91.9 | 91.7 | 91.5 | |
| 내스크래치성 | O | X | O | O | X | O | O | |
| 연필경도 | 3H | 3H | 3H | 3H | H | 3H | 3H | |
| 방오성 | 111 | 97 | 80 | 110 | 73 | 110 | 110 | |
| 내마모성 | 97 | 82 | 56 | 98 | 56 | 84 | 98 | |
| 내약품성 | 97 | 76 | 58 | 96 | 52 | 78 | 97 | |
| 내눌림성 | X | O | O | X | O | O | O | |
| 비산방지성 | X | X | O | X | O | O | O | |
| 밀착성 | O | O | X | X | O | O | O | |
| 굴곡성 | O | O | X | O | O | O | X | |
| HC1 비커스 하드니스 [kgf/mm2] |
21.1 | 12.4 | 12.6 | - | 12.4 | 3.1 | 3.1 | |
Claims (11)
- 디스플레이용 글라스 상에 형성되기 위한 것으로,실란 또는 실록산 화합물을 포함하고, 비커스 경도가 20 kgf/mm2 이하인 제1 하드코팅층; 및상기 제1 하드코팅층 상에 형성되며, 불소계 UV 경화형 관능기 함유 화합물을 포함하고, 두께가 3 내지 15㎛인 제2 하드코팅층을 포함하는 것을 특징으로 하는, 하드코팅 필름.
- 청구항 1에 있어서,상기 디스플레이용 글라스는, UTG(Ultra Thin Glass)인 것을 특징으로 하는, 하드코팅 필름.
- 청구항 1에 있어서,상기 디스플레이용 글라스, 제1 하드코팅층 및 제2 하드코팅층은, 별도의 층을 포함하지 않고 각각 직접 접촉하여 형성되는 것을 특징으로 하는, 하드코팅 필름.
- 청구항 1에 있어서,상기 불소계 UV 경화형 관능기 함유 화합물은, UV 경화형 관능기를 1 내지 6개 가지는, 하드코팅 필름.
- 청구항 1에 있어서,상기 제1 하드코팅층 및 제2 하드코팅층 중 어느 하나의 하드코팅층은, 광중합성 화합물, 개시제 및 용제로 이루어진 군에서 선택되는 1종 이상을 포함하는 조성물로부터 제조되는 것인, 하드코팅 필름.
- 청구항 5에 있어서,상기 광중합성 화합물은, 무기 나노 필러를 더 포함하는, 하드코팅 필름.
- 청구항 1에 있어서,상기 제1 하드코팅층 및 제2 하드코팅층 중 어느 하나의 하드코팅층은, 첨가제를 더 포함하는, 하드코팅 필름.
- 청구항 7에 있어서,상기 첨가제는 레벨링제, 자외선 안정제 및 열 안정제로 이루어진 군에서 선택되는 1종 이상을 포함하는, 하드코팅 필름.
- 청구항 1에 있어서,플렉서블 디스플레이에 적용되는 것인, 하드코팅 필름.
- 디스플레이용 글라스; 및상기 디스플레이용 글라스 상에 형성된 하드코팅 필름을 포함하는 윈도우로,상기 하드코팅 필름은 청구항 1 내지 9 중 어느 한 항에 따른 하드코팅 필름을 포함하는, 윈도우.
- 청구항 10에 따른 윈도우를 포함하는, 화상 표시 장치.
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| KR20250161839A (ko) * | 2024-05-09 | 2025-11-18 | 동우 화인켐 주식회사 | 하드코팅 필름 및 이를 포함하는 화상 표시 장치 |
| KR20260011956A (ko) * | 2024-07-17 | 2026-01-26 | 동우 화인켐 주식회사 | 광학 적층체 및 이를 포함하는 화상 표시 장치 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130071582A (ko) * | 2011-12-21 | 2013-07-01 | (주)엘지하우시스 | 인쇄가능한 글래스 비산 방지 필름 및 그 제조방법 |
| KR20180027317A (ko) * | 2016-09-05 | 2018-03-14 | 동우 화인켐 주식회사 | 하드코팅 필름 및 이를 구비한 화상표시장치 |
| KR20210010029A (ko) * | 2019-07-19 | 2021-01-27 | 주식회사 엘지화학 | 플렉서블 디스플레이 장치의 커버 윈도우용 보호필름, 이를 포함한 커버 윈도우 및 디스플레이 장치 |
| JP2021015168A (ja) * | 2019-07-11 | 2021-02-12 | 東山フイルム株式会社 | ハードコートフィルムおよびこれを用いたフレキシブルディスプレイ |
| KR20210123038A (ko) * | 2020-04-02 | 2021-10-13 | 동우 화인켐 주식회사 | 하드코팅 필름 및 이를 포함하는 화상 표시 장치 |
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| JP5416546B2 (ja) | 2009-10-23 | 2014-02-12 | 日東電工株式会社 | 透明基板 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130071582A (ko) * | 2011-12-21 | 2013-07-01 | (주)엘지하우시스 | 인쇄가능한 글래스 비산 방지 필름 및 그 제조방법 |
| KR20180027317A (ko) * | 2016-09-05 | 2018-03-14 | 동우 화인켐 주식회사 | 하드코팅 필름 및 이를 구비한 화상표시장치 |
| JP2021015168A (ja) * | 2019-07-11 | 2021-02-12 | 東山フイルム株式会社 | ハードコートフィルムおよびこれを用いたフレキシブルディスプレイ |
| KR20210010029A (ko) * | 2019-07-19 | 2021-01-27 | 주식회사 엘지화학 | 플렉서블 디스플레이 장치의 커버 윈도우용 보호필름, 이를 포함한 커버 윈도우 및 디스플레이 장치 |
| KR20210123038A (ko) * | 2020-04-02 | 2021-10-13 | 동우 화인켐 주식회사 | 하드코팅 필름 및 이를 포함하는 화상 표시 장치 |
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| KR20240003276A (ko) | 2024-01-08 |
| JP2025522773A (ja) | 2025-07-17 |
| CN119585221A (zh) | 2025-03-07 |
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