Cover window and manufacturing method thereof

Abstract

The present invention relates to a cover window using plastic instead of glass, and a method for manufacturing the same, the cover window comprising: a substrate layer formed of a transparent plastic material; a black layer laminated on one surface of the substrate layer and formed along the periphery of the substrate layer; and an elastic body layer formed so as to cover the other surface of the base material layer and one surface of the black layer together.

Description

Technical Field

[0001] The present invention relates to a cover window and a method for manufacturing the same, and more particularly, to a cover window and a method for manufacturing the same for improving adhesion when a rubber-molded elastomer layer is applied to a cover window using plastic instead of glass. Background Art

[0002] Transparent external parts of automobiles are widely used in headlights, brake lights and other headlights. As for the outermost cover of the headlights, the headlights are made of polycarbonate (PC) and the brake lights are made of polymethylmethacrylate (PMMA).

[0003] In the case of headlights, polycarbonate is mainly used, and in the case of taillights, polymethyl methacrylate is mainly used. In the case of polymethyl methacrylate, since it is very brittle, it cannot be used for headlights due to stability problems. In the case of polycarbonate, since it has poor weather resistance, hard coating is used to compensate for the weak points.

[0004] The black area of ​​the car window using double injection of the headlight is only a very small part of about 3mm to 4mm, but due to the peeling of the coating surface and the large area exposed to the outside, there are problems such as yellowing caused by sunlight.

[0005] When the transparent polycarbonate layer is exposed to sunlight or artificial lighting, the polymer bonds may be broken by ultraviolet rays. As a result, the polymer bonds may be broken, whitened, discolored (yellowing), and the physical properties may be reduced. When large-area double-material injection molding is performed, in order to minimize the effects of reduced adhesion at the interface, reduced coating life, or yellowing, an excellent resin composition that can improve visible light shielding, infrared transmission, and refractive index is required.

[0006] On the other hand, when polycarbonate and thermoplastic elastomer (TPE) are used for molding and injection molding, the problem of adhesion does not have a great impact, but strict quality standards are applied due to the characteristics of automotive exterior parts.

[0007] When insert molding polycarbonate and thermoplastic elastomer, the bonding force may decrease due to the substrate temperature, mold temperature, resin temperature and injection pressure. In order to improve this problem, when the product shape is engraved to increase the surface area of ​​the injection surface, there will be a problem that the adhesion between the thermoplastic elastomer and polycarbonate is reduced due to gas (GAS). That is, as the gas fills the concave part, there will be a problem that the bonding force is reduced due to the unmolded or the surface quality is reduced.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Korean Authorized Patent No. 10-2325187 (November 5, 2021). Summary of the invention

[0011] The present invention is proposed to solve the above-mentioned problems, and an object of the present invention is to provide a cover window and a manufacturing method thereof for improving adhesion when a rubber-molded elastomer layer is applied to a cover window made of plastic instead of glass.

[0012] Another object of the present invention is to provide a cover window and a method for manufacturing the same, which are cover windows made of plastic instead of glass and which can improve light stability and prevent a decrease in adhesion.

[0013] Furthermore, an object of the present invention is to provide a cover window and a method for manufacturing the same, which can improve the boundary surface intrusion problem by forming a notch at the boundary surface between the substrate layer and the black layer.

[0014] In order to achieve the above-mentioned purpose, the cover window of the preferred embodiment of the present invention includes: a substrate layer, which is formed of a transparent plastic material; a black layer, which is stacked on one side of the above-mentioned substrate layer and formed around the above-mentioned substrate layer; and an elastomer layer, which is formed in a manner of wrapping the other side of the above-mentioned substrate layer and one side of the above-mentioned black layer together.

[0015] Furthermore, the present invention provides a cover window characterized in that a protrusion is formed on the black layer, protruding from one surface of the black layer and being inserted into and connected to the elastic layer.

[0016] Furthermore, the present invention provides a cover window, characterized in that the black layer is laminated on the substrate layer by double injection molding or insert injection molding, and a mold protrusion is formed in the injection mold at a position corresponding to the boundary surface between the black layer and the inner surface of the substrate layer.

[0017] Furthermore, the present invention provides a cover window, characterized in that a notch corresponding to the shape of the mold protrusion is formed in the base material layer.

[0018] Furthermore, the present invention provides a cover window, wherein the notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

[0019] Furthermore, the present invention provides a cover window, characterized in that the substrate layer comprises 80 to 90 weight percent of polycarbonate resin (PC), 1 to 5 weight percent of colored particles, 1 to 3 weight percent of hindered amine light stabilizer (HALS), 1 to 3 weight percent of light stabilizer and 0.1 to 5 weight percent of coating solvent.

[0020] Furthermore, the present invention provides a cover window, characterized in that the black layer comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, 0.1 to 5 weight percent of a coating solvent, and 0.0001 to 5 weight percent of a sunscreen.

[0021] Furthermore, the present invention provides a cover window, characterized in that it further includes a coating layer laminated on the other side of the substrate layer, and the elastic layer is formed in a manner of wrapping the black layer, the substrate layer, and the coating layer together.

[0022] Furthermore, the present invention provides a cover window, characterized in that the above-mentioned coating contains 30 weight percent to 50 weight percent of polyhedral oligomeric silsesquioxane (POSS), 20 weight percent to 30 weight percent of epoxy oligomer, 10 weight percent to 20 weight percent of epoxy monomer, 5 weight percent to 30 weight percent of nano-silica, 5 weight percent to 10 weight percent of silicone oil, 1 weight percent to 5 weight percent of metal oxide, 1 weight percent to 3 weight percent of ultraviolet absorber, 1 weight percent to 3 weight percent of ultraviolet scatterer, 1 weight percent to 5 weight percent of light stabilizer, and 1 weight percent to 5 weight percent of other additives.

[0023] In order to achieve the above-mentioned purpose, the manufacturing method of the cover window of the preferred embodiment of the present invention includes: a substrate layer forming step, forming a substrate layer formed of a transparent plastic material; a black layer forming step, forming a black layer on one side of the substrate layer and along the periphery of the substrate layer; and an elastomer layer forming step, forming the elastomer layer by wrapping the other side of the substrate layer and the one side of the black layer together.

[0024] Furthermore, the present invention provides a method for manufacturing a cover window, wherein in the black layer forming step, a protrusion is formed on the black layer so as to protrude from one surface of the black layer and be inserted into the elastic layer.

[0025] Furthermore, the present invention provides a method for manufacturing a cover window, characterized in that, in the above-mentioned black layer forming step, the above-mentioned black layer is stacked on the above-mentioned substrate layer by double injection molding or insert injection molding, and a mold protrusion is formed in the injection mold at a position corresponding to the boundary surface between the above-mentioned black layer and the inner surface of the above-mentioned substrate layer.

[0026] Furthermore, the present invention provides a method for manufacturing a cover window, wherein in the black layer forming step, a notch corresponding to the shape of the mold protrusion is formed in the base layer.

[0027] Furthermore, the present invention provides a method for manufacturing a cover window, wherein the notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

[0028] Furthermore, the present invention provides a method for manufacturing a cover window, characterized in that, in the above-mentioned substrate layer forming step, the above-mentioned substrate layer contains 80 weight percent to 90 weight percent of polycarbonate resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of hindered amine light stabilizer, 1 weight percent to 3 weight percent of light stabilizer and 0.1 weight percent to 5 weight percent of coating solvent.

[0029] Furthermore, the present invention provides a method for manufacturing a cover window, characterized in that, in the above-mentioned black layer forming step, the above-mentioned black layer contains 80 weight percent to 90 weight percent of polycarbonate resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of hindered amine light stabilizer, 1 weight percent to 3 weight percent of light stabilizer, 0.1 weight percent to 5 weight percent of coating solvent and 0.0001 weight percent to 5 weight percent of light shielding agent.

[0030] Furthermore, the present invention provides a method for manufacturing a cover window, characterized in that after the above-mentioned black layer forming step, it also includes a coating forming step of forming a coating on the other side of the above-mentioned substrate layer, and the above-mentioned elastomer layer is formed in a manner of wrapping the above-mentioned black layer, the above-mentioned substrate layer and the above-mentioned coating together.

[0031] Furthermore, the present invention provides a method for manufacturing a cover window, characterized in that, in the coating forming step, the coating comprises 30 to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 to 30 weight percent of epoxy oligomer, 10 to 20 weight percent of epoxy monomer, 5 to 30 weight percent of nano-silica, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxide, 1 to 3 weight percent of ultraviolet absorber, 1 to 3 weight percent of ultraviolet scatterer, 1 to 5 weight percent of light stabilizer and 1 to 5 weight percent of other additives.

[0032] According to the cover window and the manufacturing method thereof of the present invention, the present invention can have the following effects: the bonding force between the polycarbonate and the thermoplastic elastomer is increased, thereby improving the bonding strength of the cover window.

[0033] Furthermore, the present invention can have the following effects: instead of using glass, the manufacturing cost can be reduced and safety accidents caused by breakage can be prevented by using plastic. When double injection molding is performed, the reduction of adhesion and discoloration of the interface between the substrate layer and the black layer can be prevented.

[0034] Furthermore, according to the present invention, the present invention can have the effect of preventing cracks in the base material layer and the coating layer and discoloration of the coating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The figure is a cross-sectional view briefly showing a cover window according to an embodiment of the present invention.

[0036] Figure 2 FIG. 1 is a diagram showing a protrusion of a cover window and a flow path of an injection resin according to an embodiment of the present invention.

[0037] Figure 3 A cross-sectional view of a cover window of an embodiment of the present invention including a coating is briefly shown.

[0038] Figure 4 A cross-sectional view briefly showing a cover window according to an embodiment of the present invention and a diagram showing movement phenomena of ultraviolet rays a, visible rays b, and infrared rays c.

[0039] Figure 5 The cross-sectional view briefly illustrates a notch of a cover window according to an embodiment of the present invention.

[0040] Figure 6 A diagram briefly illustrating mold protrusions of an injection mold for forming a black layer in a cover window according to an embodiment of the present invention.

[0041] Figure 7The flowchart briefly shows a method for manufacturing a cover window according to an embodiment of the present invention.

[0042] Description of Reference Numerals

[0043] 10: Injection mold 11: Mold protrusion

[0044] 110: base material layer 111: notch

[0045] 120: Black layer 121: Protrusion

[0046] 130: coating 200: elastomer layer. DETAILED DESCRIPTION

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0048] The present invention is susceptible to various modifications and may have various embodiments, specific embodiments of which are illustrated in the drawings and described in detail in the detailed description. This does not limit the present invention to a specific embodiment, but should be interpreted as including all changes, equivalent technical solutions or alternative technical solutions within the scope of the present invention.

[0049] The terms used in this application are only used to describe specific embodiments and are not used to limit the present invention. Unless clearly indicated in the context, a singular expression includes a plural expression.

[0050] Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person skilled in the art to which the present invention belongs. Terms defined in commonly used dictionaries may have the same meaning as that in the context of the relevant technology, and unless clearly defined in this application, may not be interpreted as idealized or overly formalized meanings.

[0051] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0052] Figure 1 To briefly illustrate a cross-sectional view of a cover window according to an embodiment of the present invention, Figure 2 FIG. 2 is a diagram showing a protrusion of a cover window and a flow path of an injection resin according to an embodiment of the present invention. Figure 3 To briefly illustrate a cross-sectional view of a cover window of an embodiment of the present invention including a coating, Figure 4 In order to briefly illustrate a cross-sectional view of a cover window according to an embodiment of the present invention and a diagram showing the movement phenomenon of ultraviolet rays, visible rays and infrared rays, Figure 5 The cross-sectional view briefly illustrates a notch of a cover window according to an embodiment of the present invention. Figure 6 A diagram briefly illustrating mold protrusions of an injection mold for forming a black layer in a cover window according to an embodiment of the present invention.

[0053] Reference Figures 1 to 6 The cover window of the embodiment of the present invention includes: a substrate layer 110, which is formed of a transparent plastic material; a black layer 120, which is stacked on one side of the substrate layer 110; and an elastomer layer 200, which is formed by wrapping the other side of the substrate layer 110 and one side of the black layer 120 together.

[0054] The cover window of the present invention can be used instead of vehicle glass and can be used for transparent external parts such as headlights and brake lights. Moreover, the shape of the cover window can be different according to the shape of the application position of the vehicle. That is, the shape of the cover window can be changed in many ways.

[0055] The substrate layer 110 may be made of at least one of polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and colorless polyimide (CPI).

[0056] The substrate layer 110 is manufactured into a plate form by extruding the above materials to prevent deformation, birefringence, moldability (film breakage and insufficient elongation), etc. Furthermore, the substrate layer 110 may use a specially colored polycarbonate material to reproduce the color of window glass.

[0057] More specifically, the substrate layer 110 includes 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, and 0.1 to 5 weight percent of a coating solvent.

[0058] The colored particles are organic particles, and because of their high oil absorption, they can prevent the weather resistance and corrosion resistance of the coating from decreasing. The colored particles can be black, green, white, transparent, etc. As an embodiment, the colored particles of the substrate layer 110 can be transparent.

[0059] Since the substrate layer 110 contains colored particle components, in addition to the purpose of coloring, the light transmittance will be greatly reduced. Therefore, in addition to improving the light safety effects such as yellowing and aging caused by ultraviolet rays, it also has the following effects, namely, improving the increase in surface temperature caused by ultraviolet rays and the resulting reduction in adhesion and shortened life of the coated surface.

[0060] Hindered Amine Light Stabilizer (HALS) is a UV stabilizer that can prevent photo-oxidation by removing free radicals generated in the photolysis reaction. The substrate layer 110 can prevent light from entering the interior of the polymer material through HALS, light stabilizer, and colored particle components. Through this light-shielding effect, the influence of harmful light wavelengths in the range of 290 to 400 nm that cause photo-oxidation degradation can be minimized.

[0061] The black layer 120 may be formed along the periphery of the base layer 110 and form an edge portion of the cover window. The shape of the black layer 120 may be changed according to the shape of the cover window.

[0062] The black layer 120 comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, 0.1 to 5 weight percent of a coating solvent, and 0.0001 to 5 weight percent of a sunscreen.

[0063] As an embodiment, the colored particles of the black layer 120 may be black. The black layer 120 may contain colored particle components, so that, in addition to the coloring purpose, the light transmittance will be greatly reduced. Therefore, in addition to improving the light safety effect such as yellowing and aging caused by ultraviolet rays, it also has the following effects, that is, improving the surface temperature increase caused by ultraviolet rays and the resulting decrease in adhesion, shortening the life of the coating surface, etc.

[0064] The black layer 120 can prevent light from entering the interior of the polymer material through the hindered amine light stabilizer, the light stabilizer, and the colored particle components. Through this light shielding effect, the influence of harmful light wavelengths in the range of 290 to 400 nm that cause photo-oxidative degradation can be minimized.

[0065] The black layer 120 contains 0.0001 wt % to 5 wt % of a light shielding agent. Figure 4 In the case where only the substrate layer 110 exists, ultraviolet rays a will be blocked, but visible rays b and infrared rays c will be transmitted. However, when the black layer 120 is stacked on the substrate layer 110, the transmittance of visible rays b and infrared rays c will be reduced, so that the light shielding effect can be improved.

[0066] The elastic layer 200 is formed to wrap the other side of the base layer 110 and the one side of the black layer 120. The elastic layer 200 may be an elastic resin such as thermoplastic elastomer (TPE) or thermoplastic vulcanizate (TPV).

[0067] The black layer 120 includes a protrusion 121 protruding from one surface of the black layer 120 and inserted into the elastic layer 200 . A plurality of protrusions 121 may be formed on one surface of the black layer 120 .

[0068] As an embodiment, the elastomer layer 200 can be formed by thermoplastic elastomer flowing between the plurality of protrusions 121 and injection molding. That is, due to the protruding shape of the protrusions 121, when the elastomer layer 200 is insert-molded, the injection surface area will increase, thereby improving the bonding strength between the black layer 120 and the elastomer layer 200.

[0069] The black layer 120 is laminated on the base layer 110 by double injection molding or insert injection molding. A mold protrusion 11 is formed at a position of the injection mold 10 for the black layer 120 corresponding to the boundary surface between the black layer 120 and the inner surface of the base layer 110.

[0070] The base layer 110 is formed with a notch 111 corresponding to the shape of the mold protrusion 11. More specifically, the mold protrusion 11 is formed in the injection mold 10 at the boundary surface between the black layer 120 and the base layer 110, and after the black layer 120 is injected, the base layer 110 is formed with a notch 111 that is recessed corresponding to the shape of the mold protrusion 11.

[0071] When the black layer 120 is injection molded on the substrate layer 110, the notch 111 is used to improve the problem of the black layer 120 intruding into the substrate layer 110 due to the tolerance of the interface between the substrate layer 110 and the black layer 120. In this case, when the size of the notch 111 on the interface between the substrate layer 110 and the black layer 120 is large, the appearance of the substrate layer 110 is bent and flashed due to pressure, thereby causing quality problems at the interface between the substrate layer 110 and the black layer 120. Therefore, it is necessary to set an appropriate size of the notch 111 (edge) on the interface.

[0072] As an embodiment, the notch 111 may be formed with a thickness of 5% to 10% of the thickness of the black layer 120. When the thickness of the notch 111 is less than 5% of the thickness of the black layer 120, the effect of improving the problem of intrusion into the base layer 110 is negligible, and when the thickness of the notch 111 is greater than 10%, a quality problem of marks appearing on the surface of the base layer 110 may occur.

[0073] The cover window of one embodiment of the present invention further includes a coating layer 130 stacked on the other side of the substrate layer 110. The coating layer 130 is located on the surface of the substrate layer 110 and protects the substrate layer 110. To this end, the coating layer 130 can be formed by applying an organic-inorganic hybrid mixture as a coating liquid. In this case, the elastomer layer 200 is formed in a manner of wrapping the black layer 120, the substrate layer 110, and the coating layer 130 together.

[0074] Moreover, the organic-inorganic hybrid mixture can be formed by chemically combining silica with epoxy resin. When the content of silica increases, the hardness will increase, but the flexibility will decrease, and when the content of epoxy resin increases, the flexibility will increase, but the hardness will decrease. Therefore, the content of the epoxy resin and silica can be adjusted according to the application purpose.

[0075] The organic-inorganic hybrid mixture is not simply a mixture of epoxy resin and silicon dioxide, but can be formed by chemical combination.

[0076] A mixture of simply mixing epoxy resin and silica has the effect of being easily manufactured, but has poor transmittance and low surface hardness, and also has problems of poor light resistance, weather resistance, and chemical resistance.

[0077] In contrast, when epoxy resin and silica are chemically bonded, although there is a problem of difficulty in manufacturing, it can ensure a transmittance of more than 89%, and has excellent hardness and flexibility, excellent light resistance, weather resistance and chemical resistance, and does not cause scattering and refraction.

[0078] Therefore, the cover window of the embodiment of the present invention is formed by coating the coating layer 130 chemically combining epoxy resin and silicon dioxide on the outer surface.

[0079] The coating 130 comprises 30 to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 to 30 weight percent of epoxy oligomer, 10 to 20 weight percent of epoxy monomer, 5 to 30 weight percent of nano-silica, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxide, 1 to 3 weight percent of ultraviolet absorber, 1 to 3 weight percent of ultraviolet scatterer, 1 to 5 weight percent of light stabilizer and 1 to 5 weight percent of other additives.

[0080] For example, the coating layer 130 may have a thickness of 10 to 20 μm. To this end, after the base layer 110 is coated with a coating liquid as an organic-inorganic hybrid mixture, the coating liquid is flattened by a roller spaced 10 to 20 μm from the surface of the base layer 110 and then hardened to form the coating layer 130 having a thickness of 10 to 20 μm.

[0081] The coating liquid can be cured by irradiating ultraviolet light with a wavelength of 365 to 395 nm at a light intensity of 500 to 2000 mJ / cm 2 .

[0082] In the cover window of one embodiment of the present invention, a coating 130 is stacked on the other side of the substrate layer 110 to reduce the transmittance of visible light b from 88.5% to 59.2% and increase the shielding rate of infrared light c from 10% to 22%, thereby improving the shading effect and the safety caused by light transmittance and physical properties such as weather resistance and abrasion resistance.

[0083] Figure 7 The flowchart briefly shows a method for manufacturing a cover window according to an embodiment of the present invention.

[0084] Reference Figure 7 The manufacturing method of the cover window of the embodiment of the present invention includes: a substrate layer forming step S100, forming a substrate layer 110 formed of a transparent plastic material; a black layer forming step S200, forming a black layer 120 on one side of the substrate layer 110 and along the periphery of the substrate layer 110; and a coating forming step S400, forming an elastomer layer 200 in a manner of wrapping the other side of the substrate layer 110 and one side of the black layer 120 together.

[0085] In the substrate layer forming step S100, the substrate layer 110 comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, and 0.1 to 5 weight percent of a coating solvent.

[0086] In the black layer forming step S200, the black layer 120 is stacked on the base layer 110 by double injection molding or insert molding. The black layer forming step S300 is a step of forming the black layer 120 around the base layer 110, and is a step of forming the edge of the cover window.

[0087] In the black layer forming step S200, a mold protrusion 11 is provided at a position of the injection mold 10 corresponding to the boundary surface between the black layer 120 located on the inner surface of the base layer 110, and a notch 111 corresponding to the shape of the mold protrusion 11 is formed in the base layer 110. In this case, as an embodiment, the notch 111 may be formed with a thickness of 5% to 10% of the thickness of the black layer 120.

[0088] In the black layer forming step S200 , when the black layer 120 is laminated on the base layer 110 by double injection molding, the black layer 120 as a second injection molded product is sequentially injection-molded and laminated on one side of the base layer 110 as a first injection molded product.

[0089] In the black layer forming step S200, when the black layer 120 is laminated on the substrate layer 110 by insert injection molding, the substrate layer 110 as the first injection molded product is fully cooled after injection molding, and then the black layer 120 as the second injection molded product is injection molded and laminated on one side of the substrate layer 110. In this case, when the first injection molded product is inserted into the injection mold 10 for the second injection molding, the shape of the first injection molded product and the shape of the second injection molded product may be inconsistent. In order to improve this problem, when the thickness of the first injection molded product is 2.5 to 4.5 tons, it is preheated to 100 to 120 degrees Celsius in an oven at 120 to 150 degrees Celsius, and then placed in the second injection mold 10 for insert injection molding. In this way, cracks on the surface of the cover window and flashes on the substrate layer 110 and the black layer 120 can be improved.

[0090] In the black layer forming step S200, the black layer 120 comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, 0.1 to 5 weight percent of a coating solvent, and 0.0001 to 5 weight percent of a sunscreen.

[0091] On the other hand, in the black layer forming step ( S200 ), the protrusion 121 that protrudes from one surface of the black layer 120 and is inserted into the elastic layer 200 is formed on the black layer 120 .

[0092] In the elastic layer forming step S400, the elastic layer 200 is formed by wrapping the other side of the substrate layer 110 and the one side of the black layer 120 together. The elastic layer 200 can be formed by insert molding the product of the black layer forming step S200. As an embodiment, the elastic layer forming step S400 can be a step of flowing a thermoplastic elastomer resin between the plurality of protrusions 121 and injection molding the elastic layer 200.

[0093] The manufacturing method of the cover window of an embodiment of the present invention may further include a coating layer forming step S300, forming a coating layer 130 on the other side of the substrate layer 110. After performing the black layer forming step S200, when the coating layer 130 is formed through the coating layer forming step S300, an elastomer layer forming step S400 is performed, so that the elastomer layer 200 wraps the black layer 120, the substrate layer 110 and the coating layer 130 together.

[0094] In the coating forming step S300, the coating 130 is formed by applying a coating liquid as an organic-inorganic hybrid mixture to the base layer 110. In the coating forming step S300, the coating liquid is directly applied to the base layer 110, flattened, and then hardened to directly coat the base layer 110.

[0095] In the coating liquid, an organic-inorganic hybrid mixture of epoxy resin and silica is applied as the coating liquid. When the content of silica increases, the hardness increases, but the flexibility decreases. When the content of epoxy resin increases, the flexibility increases, but the hardness decreases. Therefore, the content of epoxy resin and silica can be adjusted according to the application purpose.

[0096] When the coating liquid is planarized, the coating liquid applied to the base layer 110 is planarized to a predetermined thickness using a roller, a steel plate, or the like.

[0097] When the coating liquid is cured, ultraviolet rays (UV) may be irradiated to the coating liquid applied to the base layer 110. More specifically, the curing may be achieved by irradiating ultraviolet rays with a wavelength of 365 to 395 nm at a light intensity of 500 to 2000 mJ / cm2.

[0098] On the other hand, in the coating forming step S300, the coating 130 comprises 30 to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 to 30 weight percent of epoxy oligomer, 10 to 20 weight percent of epoxy monomer, 5 to 30 weight percent of nano-silica, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxide, 1 to 3 weight percent of ultraviolet absorber, 1 to 3 weight percent of ultraviolet scatterer, 1 to 5 weight percent of light stabilizer and 1 to 5 weight percent of other additives.

[0099] The present invention has been described in detail above through specific embodiments, but this is only used to specifically illustrate the present invention and the present invention is not limited thereto. A person skilled in the art in the technical field to which the present invention belongs can modify or improve the present invention within the technical concept of the present invention.

[0100] Simple deformation or modification of the present invention all belong to the field of the present invention, and the specific protection scope of the present invention can be made clearer through the protection scope of the invention claims.

Claims

1. A cover window, characterized in that: include: A substrate layer, which is formed of a transparent plastic material; A black layer is laminated on one side of the base layer and is formed along the periphery of the base layer; and The elastic layer is formed so as to wrap the other surface of the base layer and the one surface of the black layer.

2. The cover window according to claim 1, characterized in that: A protrusion is formed on the black layer, protruding from one surface of the black layer and connected so as to be inserted into the elastic layer.

3. The cover window according to claim 1, characterized in that: The black layer is laminated on the base layer by double injection molding or insert molding, and a mold protrusion is formed in an injection mold at a position corresponding to the boundary surface between the black layer and the inner surface of the base layer.

4. The cover window according to claim 3, characterized in that: A notch corresponding to the shape of the mold protrusion is formed in the base layer.

5. The cover window according to claim 4, characterized in that: The notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

6. The cover window according to claim 1, characterized in that: The substrate layer comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, and 0.1 to 5 weight percent of a coating solvent.

7. The cover window according to claim 1, characterized in that: The black layer comprises 80 to 90 weight percent of a polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of a hindered amine light stabilizer, 1 to 3 weight percent of a light stabilizer, 0.1 to 5 weight percent of a coating solvent, and 0.0001 to 5 weight percent of a sunscreen.

8. The cover window according to claim 1, characterized in that: It also includes a coating layer laminated on the other side of the substrate layer. The elastic layer is formed so as to wrap the black layer, the base layer, and the coating layer.

9. The cover window according to claim 8, characterized in that: The coating comprises 30 to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 to 30 weight percent of epoxy oligomer, 10 to 20 weight percent of epoxy monomer, 5 to 30 weight percent of nano silicon dioxide, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxide, 1 to 3 weight percent of ultraviolet absorber, 1 to 3 weight percent of ultraviolet scatterer, 1 to 5 weight percent of light stabilizer and 1 to 5 weight percent of other additives.

10. A method for manufacturing a cover window, characterized in that: include: a substrate layer forming step, which forms a substrate layer made of a transparent plastic material; A black layer forming step, which forms a black layer on one side of the substrate layer and along the periphery of the substrate layer; and The elastic layer forming step is to form the elastic layer so as to wrap the other surface of the base layer and the one surface of the black layer.

11. The method for manufacturing a cover window according to claim 10, characterized in that: In the black layer forming step, a protrusion is formed on the black layer so as to protrude from one surface of the black layer and be connected so as to be inserted into the elastic layer.

12. The method for manufacturing a cover window according to claim 10, characterized in that: In the black layer forming step, the black layer is stacked on the base layer by double injection molding or insert molding, and a mold protrusion is formed in the injection mold at a position corresponding to the boundary surface between the black layer and the inner surface of the base layer.

13. The method for manufacturing a cover window according to claim 12, characterized in that: In the black layer forming step, a notch corresponding to the shape of the mold protrusion is formed in the base layer.

14. The method for manufacturing a cover window according to claim 13, characterized in that: The notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

15. The method for manufacturing a cover window according to claim 10, characterized in that: In the above-mentioned substrate layer forming step, the above-mentioned substrate layer contains 80 weight percent to 90 weight percent of polycarbonate resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of hindered amine light stabilizer, 1 weight percent to 3 weight percent of light stabilizer and 0.1 weight percent to 5 weight percent of coating solvent.

16. The method for manufacturing a cover window according to claim 10, characterized in that: In the above-mentioned black layer forming step, the above-mentioned black layer contains 80 weight percent to 90 weight percent of polycarbonate resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of hindered amine light stabilizer, 1 weight percent to 3 weight percent of light stabilizer, 0.1 weight percent to 5 weight percent of coating solvent and 0.0001 weight percent to 5 weight percent of sunscreen.

17. The method for manufacturing a cover window according to claim 10, characterized in that: The method further comprises a coating layer forming step of forming a coating layer on the other side of the substrate layer after the black layer forming step. The elastic layer is formed so as to wrap the black layer, the base layer, and the coating layer.

18. The method for manufacturing a cover window according to claim 17, characterized in that: In the above-mentioned coating formation step, the above-mentioned coating contains 30 weight percent to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 weight percent to 30 weight percent of epoxy oligomer, 10 weight percent to 20 weight percent of epoxy monomer, 5 weight percent to 30 weight percent of nano-silica, 5 weight percent to 10 weight percent of silicone oil, 1 weight percent to 5 weight percent of metal oxide, 1 weight percent to 3 weight percent of ultraviolet absorber, 1 weight percent to 3 weight percent of ultraviolet scatterer, 1 weight percent to 5 weight percent of light stabilizer and 1 weight percent to 5 weight percent of other additives.

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