WO2014030848A1 - 하드코팅 필름 - Google Patents
하드코팅 필름 Download PDFInfo
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- WO2014030848A1 WO2014030848A1 PCT/KR2013/006777 KR2013006777W WO2014030848A1 WO 2014030848 A1 WO2014030848 A1 WO 2014030848A1 KR 2013006777 W KR2013006777 W KR 2013006777W WO 2014030848 A1 WO2014030848 A1 WO 2014030848A1
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- Prior art keywords
- film
- hard coating
- layer
- hard coat
- hard
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- 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
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/08—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
Definitions
- the present invention relates to a hard coat film. More specifically, the present invention relates to a hard coat film exhibiting high hardness and excellent properties.
- Glass or tempered glass is generally used as a material having excellent mechanical properties in the display window or the front plate of the mobile device.
- the glass causes the mobile device to be heavier due to its weight and there is a problem of breakage due to external impact.
- Plastic resin is being researched as a substitute material for glass.
- Plastic resin films are lightweight and less prone to break, making them suitable for the trend toward lighter mobile devices.
- films have been proposed in which a hard coat layer is coated on a resin substrate to achieve a film having properties of high hardness and wear resistance.
- a method of increasing the thickness of the hard coating layer may be considered.
- the surface hardness may be increased.
- wrinkles or curls increase due to hardening shrinkage of the hard coating layer, cracks or peeling of the hard coating layer are likely to occur. Is not easy.
- Korean Unexamined Patent Publication No. 2010-0041992 discloses a hard coating film composition excluding a monomer and using a binder resin including an ultraviolet curable polyurethane acrylate-based oligomer.
- the hard coat film disclosed above is not strong enough to replace the glass panel of the display with a pencil hardness of about 3H.
- the present invention provides a hard coating film exhibiting high hardness and excellent properties.
- It provides a hard coating film comprising a second hard coating layer in direct contact with the first hard coating layer and having a second elastic modulus, wherein the difference between the first and second elastic modulus is 500 MPa or more.
- the hard coating film of the present invention exhibits high hardness, scratch resistance, high transparency, and does not generate curl or cracks due to its excellent workability, and thus can be usefully applied to mobile devices, display devices, front panels of various instrument panels, and cover parts. .
- the hard coat film of the present invention comprises: a first hard coat layer having a first elastic modulus; And a second hard coat layer in direct contact with the first hard coat layer and having a second modulus of elasticity, wherein the difference between the first and second modulus of elasticity is 500 MPa or more.
- each component when each component is referred to as being formed “on” or “on” of each component, it means that each component is directly formed on each component, or other components It means that it can be additionally formed on the object, the substrate between each layer.
- the first hard coating layer having a first elastic modulus (elastic modulus); And a second hard coat layer in direct contact with the first hard coat layer and having a second modulus of elasticity, wherein a difference between the first and second modulus of elasticity is 500 MPa or more.
- direct contact does not include a structure such as another layer or film between the first and second hard coating layers, and the second hard coating layer is formed on one surface of the first hard coating layer. It means that it is formed in a direct covering form.
- the first and second hard coat layers are prepared by applying a hard coat composition on a thin release film that is not affected by shrinkage of the support substrate. After the hard coating composition is completely cured, the release film is peeled off to first form the first and second hard coating layers without a supporting substrate, thereby obtaining the hard coating film of the present invention. Next, optionally the first or second hard coating as needed A separate substrate can be laminated to the layer. The separate substrate may be adhered onto the first or second hard coat layer by lamination using an adhesive or the like. Usable adhesives are not particularly limited as long as they are known in the art.
- polyvinyl alcohol (PVA) adhesives there are one-component or two-component polyvinyl alcohol (PVA) adhesives, polyurethane adhesives, epoxy adhesives, styrene butadiene rubber (SBR) adhesives, or hot melt adhesives. It is not limited.
- PVA polyvinyl alcohol
- SBR styrene butadiene rubber
- the hard coating film of the present invention prepared as described above has excellent curling properties without warping or stacking, yet has high thickness and flatness, and exhibits high hardness, scratch resistance, and high transmittance.
- various substrates on one surface of the first or second hard coating layer according to the device to be applied it is widely applicable to display devices requiring high hardness.
- the first hard coating layer has a first elastic modulus
- the second hard coating layer has a second elastic modulus
- the first and second elastic modulus The difference is characterized in that more than 500 MPa.
- elastic modulus means a value measured according to ASTM D882.
- the hard coat film of the present invention has a form in which two layers each having a different elastic modulus are stacked, and the elastic modulus of one hard coat layer is at least 500 MPa greater than that of the other hard coat layers.
- the hard coating layer having a larger modulus of elasticity exhibits high physical strength such as high hardness
- the hard coating layer having a relatively low modulus of elasticity may exhibit layer resistance and flex resistance. Therefore, as described above, the hard coating film including two hard coating layers each having a different elastic modulus in a stacked form has a high physical strength that can replace glass and has a low curl or crack problem, thereby providing excellent processability. Can be represented.
- the difference between the first and second elastic modulus is about 500 MPa or more, for example, about 500 to about 3000 MPa, or about 500 to about 2500 MPa, or about 500 to about 2000 MPa Can be.
- the first elastic modulus is about 1500 MPa or less, for example, about 300 to about 1500 MPa, or about 300 to about 1200 MPa, or about 300 to about 1000 MPa, 2
- the modulus of elasticity may be at least about 2000 MPa, for example about 2000 to about 3500 MPa, or about 2000 to about 3000 MPa, or about 2000 to about 2800 MPa.
- the first and the second elastic modulus and the difference When the first and the second elastic modulus and the difference is within the above range, it has a high physical strength enough to replace the glass, but less curl or crack problems, it can exhibit high hardness and high layer resistance.
- the components constituting the first and second hard coating layers are not particularly limited, but according to an embodiment of the present invention, the first hard coating layer is 1 It may include a first photocurable cross-linked copolymer of the 6 to 6 functional acrylate-based monomer and the first photocurable elastomer.
- the acrylate-based means not only acrylate but also methacrylate or a derivative in which a substituent is introduced into acrylate or methacrylate.
- the photocurable elastomer means a polymer material that exhibits elasticity and includes a functional group capable of crosslinking polymerization by ultraviolet irradiation.
- the first photocurable elastomer is at least about 15%, for example from about 15 to about 200%, or from about 20 to about 200%, or about 20 as measured by ASTM D638. To elongation of about 150%.
- the first photocurable elastomer is cross-polymerized with the 1 to 6 functional acrylate monomers to form a first hard coat layer after curing, and thus the first hard coat layer formed has an appropriate modulus of elasticity. Flexibility and impact resistance can be imparted.
- the first photocurable elastomer may be a polymer or oligomer having a weight average molecular weight in the range of about 1,000 to about 600,000 g / mol, or about 10,000 to about 600,000 g / mol.
- the first photocurable elastomer is, for example, polycaprolactone, It may be at least one member selected from the group consisting of a urethane acrylate polymer, and polyrotaxane.
- polycaprolactone is formed by ring-opening polymerization of caprolactone and has excellent physical properties such as flexibility, impact resistance, and durability.
- the urethane acrylate polymer has excellent elasticity and durability, including a urethane bond.
- the components constituting the second layer are not particularly limited as long as the above-described conditions of the second elastic modulus are satisfied, but according to an embodiment of the present invention, the second hard coat layer may have a 3 to 6 functional acrylate type. And a second photocurable crosslinked copolymer with the monomer and the second photocurable elastomer, and inorganic particles dispersed in the second photocurable crosslinked copolymer.
- the second hard coat layer is in direct contact with the first hard coat layer.
- the 3 to 6 functional acrylate monomer is tri methylol propane Triacrylate (TMPTA), trimethylolpropaneethoxy triacrylate (TMPEOTA), glycerin propoxylated triacrylate (GPTA) pentaerythritol to tetraacrylate (PETA), or dipentaerythr to nuxaacrylate ( DPHA) etc. can be mentioned.
- TMPTA tri methylol propane Triacrylate
- TMPEOTA trimethylolpropaneethoxy triacrylate
- GPTA glycerin propoxylated triacrylate
- PETA pentaerythritol to tetraacrylate
- DPHA dipentaerythr to nuxaacrylate
- the 3 to 6 functional acrylate monomers may be used alone or in combination with each other.
- the second photocurable elastomer is at least about 15%, for example from about 15 to about 200%, or from about 20 to about 200%, or about 20 as measured by ASTM D638. And elongation of from about 150%.
- the second photocurable elastomer may be a polymer or oligomer having a weight average molecular weight in the range of about 1,000 to about 600,000 g / mol, or about 10,000 to about 600,000 g / mol.
- the second photocurable elastomer may be the same as or different from the first photocurable elastomer, and a detailed description thereof is as described in the first hard coating layer.
- the second hard coating layer is photocured by including one or more second photocurable elastomers selected from the group consisting of polycaprolactone, urethane acrylate-based polymers, and polyrotasein. It is possible to secure excellent layer resistance by preventing damage by external impact.
- the second photocurable ' crosslinked copolymer included in the second hard coat layer may be a copolymer crosslinked with a 3 to 6 functional acrylate monomer and a second photocurable elastomer as described above.
- the second photocurable crosslinked copolymer is 5 to 20 parts by weight of the second photocurable elastomer when the total weight of the second photocurable crosslinked copolymer is 100 parts by weight, 3 to 6 functional acrylate monomer 80 to 95 parts by weight may be cross-linked polymerized ⁇ second photocurable crosslinked air crosslinked 3 to 6 functional acrylate monomer and the second photocurable elastomer in the weight ratio Second containing coalescence
- the second hard coating filler formed thereby has an appropriate modulus of elasticity, and can achieve high hardness and high layer resistance without deteriorating other physical properties such as curling properties and light resistance.
- the second hard coat layer includes inorganic fine particles dispersed in the second photocurable crosslinked copolymer.
- the inorganic fine particles may be nanoscale inorganic fine particles, for example, nanoparticles having a particle diameter of about 100 nm or less, or about 10 to about 100 nm, or about 10 to about 50 nm. Can be used.
- the inorganic fine particles for example, silica fine particles, aluminum oxide particles, titanium oxide particles, zinc oxide particles, or the like can be used. By including the inorganic fine particles, the hardness of the hard coat film can be further improved.
- the second hard coat layer is about 40 to about 90 parts by weight of the second photocurable crosslinked copolymer and about 10 to about 100 parts by weight of the total weight of the second hard coat layer.
- the second hard coat layer of the present invention in addition to the second photocurable crosslinked copolymer and inorganic fine particles, additives commonly used in the technical field to which the present invention belongs, such as surfactants, anti-yellowing agents, leveling agents, antifouling agents, etc. It may further comprise.
- the content can be variously adjusted within the range of not lowering the physical properties of the hard coating film of the present invention, it is not particularly limited, for example, the second photocurable crosslinked copolymer 100 It may be included in about 0.1 to about 10 parts by weight, based on parts by weight.
- the second hard coating layer may include a surfactant as an additive, and the surfactant may include 1 to 2 functional fluorine acrylates, fluorine surfactants or silicon surfactants. You can be the best.
- the surfactant may be included in the form of being dispersed or crosslinked in the second crosslinked copolymer.
- the additive may include a yellowing inhibitor such as a benzophenone compound or a benzotriazole compound.
- the second hard coating layer is formed by photocuring a second hard coating composition comprising the 3 to 6 functional acrylate monomer, the second photocurable elastomer, inorganic fine particles, a photoinitiator, optionally an additive, and an organic solvent. can do.
- the other layer, film, or film may be included in direct contact with the first hard coating layer in order to secure scratch resistance by friction.
- the hard coat layer may be formed by applying and curing the first and second hard coat compositions comprising the above components on a release film.
- a thin release film which is not affected by shrinkage of the support substrate as described above, curls or cracks generated due to a difference in shrinkage with the support substrate to which the hard coating composition is applied during the curing process. You can prevent it. Accordingly, since there is no problem of curl generation, which is the most obstacle when forming a hard coating layer with a high thickness to achieve high hardness, a hard coating film can be formed with a high thickness as desired. Can provide.
- the above-mentioned first hard coat composition is applied onto a release film.
- the method of applying the first hard coating composition is not particularly limited as long as it can be used in the technical field to which the present technology belongs, for example, bar coating method, knife coating method, the coating method, blade coating method, die coating Method, micro gravure coating method, comma coating method, slot die coating method, lip coating method, or solution casting (solution casting) method can be used.
- the first hard coating composition is about 50 to about after being completely cured
- the hard coating film of the present invention even if formed to a high thickness as described above it can be produced a hard coating film of high hardness without curling or cracking.
- the release film may be used without limitation as long as it is commonly used in the art to which the present invention pertains.
- the release film is a polyester film, polyethylene film, polyethylene terephthalate film, polypropylene, polyolefin-based film such as a film may be, or a Teflon-based film, preferably a silicone to facilitate stripping Or a film release-treated with acrylsilicon.
- the release film may be removed by peeling after curing of the first and second hard coat layers.
- the first hard coat composition is photocured by irradiating ultraviolet rays to the applied first hard coat composition to form a first hard coat layer.
- a second hard coat composition comprising the above components is applied onto the first hard coat layer.
- the second hard coating composition is about 50 to about 500 j i, for example about 50, about 75 / m, about ⁇ , about 125 / ⁇ ), about 150, about 188, about 200, about 250 / after fully cured It may be applied to have a thickness of ⁇ , about 300, or about 500 ⁇ .
- the second hard coat composition is photocured by irradiating ultraviolet rays to the applied second hard coat composition to form a second hard coat layer.
- the irradiation amount of ultraviolet light may be, for example, about 20 to about 600 mJ / cm 2 , or about 50 to about 500 mJ / cm 2 .
- the light source for ultraviolet irradiation is not particularly limited as long as it can be used in the technical field to which the present technology belongs, and for example, a high pressure mercury lamp, a metal halide lamp, a black light fluorescent lamp, or the like can be used. Irradiation for about 30 seconds to about 15 minutes, or about 1 minute to about 10 minutes with the above irradiation amount may be carried out photocuring.
- the acrylate-based binder monomer may cause curing shrinkage or curl phenomenon in which the resin substrate is rolled up together with the coating layer due to shrinkage due to curing in the photocuring step.
- the curl phenomenon refers to a phenomenon in which a corner or the like is curved or curled when the film having a flat structure is laid out on a flat surface, which is a phenomenon that occurs when the acrylate shrinks during photocuring by ultraviolet rays.
- a hard coating film for use as a cover of a mobile communication terminal such as a smartphone or a tablet PC
- the thickness of the hard coating layer must be increased to a certain thickness or more, for example, 50 / m or more.
- the hard coat film of the present invention when forming the first and second hard coat layer, there is a fear that curling or cracking may occur because the coating is applied on a thin release film that is not affected by the shrinkage of the substrate without using a supporting substrate. It is possible to form a hard coat layer with a high thickness of 50 or more, for example 50 to 500. In addition, even without using a supporting substrate, it is possible to provide a hard coating film having a high hardness without deterioration of physical properties required for the hard coating film such as hardness and layer resistance.
- the release film may be peeled off to obtain a hard coating film having a crab first and a second hard coating layer formed thereon without a supporting substrate.
- a second hard coat layer may be first formed on a release film, and a first hard coat layer may be formed on the second hard coat layer.
- a separate substrate may be further laminated on the first hard coat layer or the second hard coat layer.
- the type and method of attaching the stackable substrate may vary depending on the device to which the hard coat film of the present invention is applied, and are not particularly limited in terms of materials and physical properties.
- a plastic resin film, an adhesive film, a release film It may be at least one selected from the group consisting of a conductive film, a conductive layer, a coating layer, a cured resin layer, a non-conductive film, a metal mesh layer, or a patterned metal layer.
- the layer, film, or film may be a single layer, a double layer or It may be in any form of lamination.
- the plastic resin film may include, for example, polyester such as polyethyleneterephtalate (PET), polyethylene such as ethylene vinyl acetate (EVA), and cyclic olefin polymer (cyclic olefin).
- PET polyethyleneterephtalate
- EVA ethylene vinyl acetate
- cyclic olefin polymer cyclic olefin polymer
- polymer COP
- COC cyclic olefin copolymer
- PAC polyacrylate
- PC polycarbonate
- PE polyethylene
- PE polymethylmethacrylate
- PMMA polymethylmethacrylate
- PEEK polyetheretherketon
- PEN polyethylenenaphthalate
- PEI polyetherimide
- PI polyimide
- TAC triacetylcellulose
- a film containing MMA (methyl methacrylate), a fluorine resin, or the like can be used.
- the separate substrate may be laminated on the first or second hard coating layer by laminating an independent film using an adhesive or an adhesive film, or by coating, vapor deposition, sputtering, or the like.
- the present invention is not limited thereto.
- Usable adhesives are not particularly limited as long as they are known in the art.
- the adhesive film is not particularly limited as long as it can be used in the art to which the present technology belongs, but preferably a double-sided adhesive film such as an optically clear adhesive (OCA) film may be used.
- OCA optically clear adhesive
- the hard coating film of the present invention prepared as described above has excellent curling properties without warping or cracking, but also has high thickness and flatness, and exhibits high hardness, scratch resistance, and high transmittance.
- various substrates may be stacked on at least one surface of the first or second hard coating layer according to the device to be applied, and thus the present invention may be widely applied to display devices requiring high hardness.
- the hard coating film of the present invention can be directly attached to the device substrate or combined with other devices, and is useful for the touch panel, polarizer, OLED device and cover substrate or device substrate of various displays of mobile communication terminals, smartphones or tablet PCs. Can be used.
- the hard coat film of the present invention exhibits excellent high hardness, scratch resistance, layer resistance, high transparency, durability, light resistance, light transmittance and the like.
- TMPTA trimethylolpropane triacrylate
- PVT photoinitiator
- FC4430 fluorine-based surfactant
- methylethyl Ketone lg was mixed to prepare a first hard coat composition.
- the number of grooves was evaluated after reciprocating 400 times with a load of 0.5 kg with respect to the second hard coating layer.
- ⁇ when more than two home houses less than five, was evaluated as ⁇ , X if more than five home houses.
- Each hard coating film was cut into 10 cm X 10 cm and stored in a chamber of 85 ° C. and 85% humidity for 72 hours, and then the maximum value of the distance of one side of each corner from the plane when placed in the plane was measured.
- the hard coat film having a value of 500 MPa or more that the elastic modulus of the second hard coat layer is larger than the elastic modulus of the first hard coat layer showed good characteristics in all properties.
- Comparative Example 1 in which the elastic modulus of the second hard coat layer is less than 500 MPa in the difference in the elastic modulus of the first hard coat layer did not have sufficient impact resistance.
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- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13831101.4A EP2873692B1 (en) | 2012-08-23 | 2013-07-29 | Hard coating film |
| US14/423,377 US9777186B2 (en) | 2012-08-23 | 2013-07-29 | Hard coating film |
| JP2015528386A JP6133425B2 (ja) | 2012-08-23 | 2013-07-29 | ハードコーティングフィルム |
| CN201380055015.1A CN104755539B (zh) | 2012-08-23 | 2013-07-29 | 硬涂膜 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120092531 | 2012-08-23 | ||
| KR10-2012-0092531 | 2012-08-23 | ||
| KR1020130089099A KR101470463B1 (ko) | 2012-08-23 | 2013-07-26 | 하드코팅 필름 |
| KR10-2013-0089099 | 2013-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014030848A1 true WO2014030848A1 (ko) | 2014-02-27 |
Family
ID=50641353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2013/006777 Ceased WO2014030848A1 (ko) | 2012-08-23 | 2013-07-29 | 하드코팅 필름 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9777186B2 (ko) |
| EP (1) | EP2873692B1 (ko) |
| JP (1) | JP6133425B2 (ko) |
| KR (1) | KR101470463B1 (ko) |
| CN (1) | CN104755539B (ko) |
| TW (1) | TWI500669B (ko) |
| WO (1) | WO2014030848A1 (ko) |
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- 2013-07-29 CN CN201380055015.1A patent/CN104755539B/zh active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6133425B2 (ja) | 2017-05-24 |
| JP2015533866A (ja) | 2015-11-26 |
| CN104755539A (zh) | 2015-07-01 |
| EP2873692A1 (en) | 2015-05-20 |
| TWI500669B (zh) | 2015-09-21 |
| EP2873692A4 (en) | 2016-05-04 |
| KR20140027019A (ko) | 2014-03-06 |
| KR101470463B1 (ko) | 2014-12-08 |
| EP2873692B1 (en) | 2019-10-09 |
| CN104755539B (zh) | 2018-03-02 |
| US9777186B2 (en) | 2017-10-03 |
| US20150203711A1 (en) | 2015-07-23 |
| TW201420652A (zh) | 2014-06-01 |
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