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, and provides a cover window comprising: a substrate layer formed of a transparent plastic material; a black layer laminated on one surface of the base material layer and formed along the periphery of the base material layer; the elastomer layer is formed by wrapping the base material layer and the black layer together; a fixing member formed above the black layer at a predetermined distance from the elastic body layer; and a back surface coating layer laminated on a partial surface of the black layer between the elastic body layer and the fixing member.

Description

Technical Field

[0001] The present invention relates to a cover window and a manufacturing method thereof, and more particularly, to a cover window and a manufacturing method thereof which can provide a strong fixing force and reduce process steps by integrally injection molding a fixing device for a rear side window glass of a vehicle with an elastomer layer. Background Art

[0002] The rear side window glass (QTR GLASS) of conventional vehicles is firmly attached to the vehicle body by using fixing devices (locating pins, mounting pins, hook-type rings) and adhesives, etc. In order to make these fixing devices, they can be assembled and attached separately or formed by insert injection molding, etc., but in this case, additional process steps are required, making it a factor that increases processing costs.

[0003] Usually, in addition to the above-mentioned fixing means, a sealant is also used to more firmly attach the body and the glass. At this time, the sealant must be applied to the area near the locating pins to avoid the locating pins, which brings difficulties to the process.

[0004] On the one hand, transparent exterior parts of automobiles are widely used in lights such as headlights and brake lights. The outermost cover of lights such as headlights uses polycarbonate (PC) and brake lights use polymethyl methacrylate (PMMA).

[0005] PC is mainly used for headlights, and PMMA is mainly used for rear lights. However, PMMA cannot be used for headlights because of its stability problems due to its strong brittleness. PC has poor weather resistance, so its weakness is compensated by hard coating.

[0006] The black area of ​​the car window using double injection molding of the headlight is only about 3mm to 4mm. Although it is a very small part, there are problems such as yellowing caused by sunlight due to peeling of the coating surface and large area exposure.

[0007] When the transparent PC layer is exposed to sunlight or artificial lighting, the polymer bonds may be broken by ultraviolet rays. This can lead to polymer bond breakage, white deterioration, color change (yellowing), and physical property deterioration. In order to minimize the effects of decreased interfacial adhesion, shortened coating life, or yellowing during large-area double-injection molding, an excellent resin composition that can improve visible light shielding, infrared transmittance, and refractive index is required.

[0008] On the one hand, adhesion issues do not have a significant impact when using PC and thermoplastic elastomers (TPE) for molding and injection molding, but due to the nature of automotive exterior parts, strict quality standards need to be applied.

[0009] When insert molding PC and TPE, the adhesion may decrease due to the substrate temperature, mold temperature, resin temperature and injection pressure. In order to improve these problems, when the product shape is engraved to increase the surface area of ​​the injection surface, there is a problem that the adhesion between TPE and PC is reduced due to gas (GAS). In other words, there is a problem that molding cannot be performed due to the concave part being filled with gas, or the adhesion is reduced due to the deterioration of surface quality.

[0010] Prior art literature

[0011] Patent Literature

[0012] (Patent Document 1) Korean registered patent No. 10-2325187 (2021.11.05). Summary of the invention

[0013] Technical issues

[0014] The present invention is invented to solve the above problems, and its purpose is to provide a cover window and a manufacturing method thereof, which provides a strong fixing force and reduces the process steps by integrally injection molding a fixing device of a rear side window glass of a vehicle with an elastomer layer.

[0015] Also, an object of the present invention is to provide a cover window and a method of manufacturing the same, in which the adhesiveness is improved when a rubber-molded elastomer layer is applied to the cover window using plastic instead of glass.

[0016] Also, an object of the present invention is to provide a cover window and a method of manufacturing the same, which improves light stability and prevents adhesion degradation using a cover window made of plastic instead of glass.

[0017] Furthermore, an object of the present invention is to provide a cover window and a method for manufacturing the same, which can improve the problem of boundary surface intrusion by forming a notch at the boundary surface between a substrate layer and a black layer.

[0018] Technical Solution

[0019] In order to achieve the above-mentioned purpose, a cover window is provided. According to a preferred embodiment of the present invention, the cover window comprises: a substrate layer, which is formed of a transparent plastic material; a black layer, which is laminated on one side of the substrate layer and formed around the substrate layer; an elastomer layer, which is formed in a manner of wrapping the substrate layer and the black layer together; a fixing component, which is separated from the elastomer layer by a predetermined distance and formed above the black layer; and a back coating layer, which is laminated on a partial surface of the black layer located between the elastomer layer and the fixing component.

[0020] A cover window is also provided, characterized in that the fixing component comprises: a positioning pin, which is arranged above the black layer; a fixing portion, which is integrally injection-molded with the elastomer layer through a connecting channel arranged above the back coating, and fastens the positioning pin to the black layer.

[0021] A cover window is also provided, wherein a protrusion is formed in the black layer, the protrusion protruding from one surface of the black layer as a reference and being inserted into and connected to the elastic layer.

[0022] A cover window is also provided, 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.

[0023] A cover window is also provided, wherein a notch corresponding to the shape of the protrusion of the mold is formed in the base material layer.

[0024] A cover window is also provided, wherein the notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

[0025] A cover window is also provided, characterized in that the substrate layer comprises 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0026] A cover window is also provided, characterized in that the black layer comprises 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0027] A cover window is also provided, characterized in that it further comprises a front coating layer laminated on the other side of the substrate layer; and the elastomer layer is formed in a manner of wrapping the black layer, the substrate layer and the front coating layer together.

[0028] A cover window is also provided, characterized in that the front coating and the back coating include 30 weight percent to 50 weight percent of polyhedral oligomeric silsesquioxane (POSS), 20 weight percent to 30 weight percent of epoxy oligomers, 10 weight percent to 20 weight percent of epoxy monomers, 5 weight percent to 30 weight percent of nano silicon dioxide, 5 weight percent to 10 weight percent of silicone oil, 1 weight percent to 5 weight percent of metal oxides, 1 weight percent to 3 weight percent of ultraviolet absorbers, 1 weight percent to 3 weight percent of ultraviolet scatterers, 1 weight percent to 5 weight percent of light stabilizers, and 1 weight percent to 5 weight percent of other additives.

[0029] In order to achieve the above-mentioned purpose, the manufacturing method of the cover window according to 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 above-mentioned substrate layer along the periphery of the above-mentioned substrate layer; a back coating forming step, forming a laminated back coating on a part of the surface of the above-mentioned black layer; an elastomer layer forming step, forming an elastomer layer in a manner of wrapping the above-mentioned substrate layer and the above-mentioned black layer together; and a fixing component forming step, which is formed simultaneously with the above-mentioned elastomer layer forming step and is separated from the above-mentioned elastomer layer by a certain distance so as to form a fixing component above the above-mentioned black layer.

[0030] A method for manufacturing a cover window is also provided, characterized in that the above-mentioned fixing component forming step includes: a positioning pin embedding step, in which a positioning pin is arranged above the above-mentioned black layer; and a fixing portion forming step, in which the positioning pin is integrally injection-molded with the above-mentioned elastomer layer through a connecting channel arranged above the above-mentioned back coating, and the positioning pin is fastened to the forming fixing portion of the above-mentioned black layer.

[0031] A method for manufacturing a cover window is also provided, wherein in the black layer forming step, a protrusion is formed in the black layer, the protrusion protruding from one surface of the black layer as a reference and connected in a manner of being inserted into the elastic layer.

[0032] A method for manufacturing a cover window is also provided, 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-material 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 located on the inner surface of the above-mentioned substrate layer.

[0033] A method for manufacturing a cover window is also provided, wherein in the step of forming the black layer, a notch corresponding to the shape of the protrusion of the mold is formed in the substrate layer.

[0034] A method for manufacturing a cover window is also provided, wherein the notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

[0035] A method for manufacturing a cover window is also provided, characterized in that in the above-mentioned substrate layer forming step, the substrate layer includes 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0036] A method for manufacturing a cover window is also provided, characterized in that, in the above-mentioned black layer forming step, the black layer includes 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0037] A method for manufacturing a cover window is also provided, characterized in that after the above-mentioned black layer forming step, it also includes a front coating forming step of forming a front 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 front coating together.

[0038] A method for manufacturing a cover window is also provided, characterized in that in the front coating forming step and the back coating forming step, the front coating and the back coating include 30 weight percent to 50 weight percent of polyhedral oligomeric silsesquioxane (POSS), 20 weight percent to 30 weight percent of epoxy oligomers, 10 weight percent to 20 weight percent of epoxy monomers, 5 weight percent to 30 weight percent of nano silicon dioxide, 5 weight percent to 10 weight percent of silicone oil, 1 weight percent to 5 weight percent of metal oxides, 1 weight percent to 3 weight percent of ultraviolet absorbers, 1 weight percent to 3 weight percent of ultraviolet scatterers, 1 weight percent to 5 weight percent of light stabilizers, and 1 weight percent to 5 weight percent of other additives.

[0039] Effects of the Invention

[0040] According to the cover window and the manufacturing method thereof of the present invention, a fixing device for a rear side window glass of a vehicle is integrally injection-molded with an elastomer layer, thereby obtaining a strong fixing force and reducing the effects of process steps.

[0041] Also, when the rubber-molded elastomer layer is applied to a cover window using plastic instead of glass, an effect of improving adhesion can be obtained.

[0042] Furthermore, according to the present invention, by forming a notch at the interface between the base material layer and the black layer, it is possible to obtain an effect of improving the problem of intrusion at the interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 FIG. 1 is a cross-sectional view schematically showing a cover window according to an embodiment of the present invention.

[0044] Figure 2 FIG. 4 is a cross-sectional view showing a connection channel of a cover window according to an embodiment of the present invention.

[0045] Figure 3 A diagram showing a partial back side of a rear side window glass of a vehicle to which a cover window according to an embodiment of the present invention is applied.

[0046] Figure 4 FIG. 1 is a diagram illustrating a protrusion of a cover window and a flow path of an injection resin according to an embodiment of the present invention.

[0047] Figure 5 FIG. 1 is a cross-sectional view schematically showing a cover window including a front coating according to an embodiment of the present invention.

[0048] Figure 6 2 is a diagram schematically showing a cross-sectional view of a cover window according to an embodiment of the present invention and a movement phenomenon of ultraviolet rays (a), visible rays (b), and infrared rays (c).

[0049] Figure 7 FIG. 1 is a cross-sectional view schematically showing a notch of a cover window according to an embodiment of the present invention.

[0050] Figure 8 FIG. 1 is a schematic diagram showing a mold protrusion of an injection mold for forming a black layer in a cover window according to an embodiment of the present invention.

[0051] Fig. 9 FIG. 1 is a flow chart schematically illustrating a method for manufacturing a cover window according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] The present invention can make various changes and have multiple embodiments, so specific embodiments are shown in the drawings and described in detail. This does not mean that the present invention is limited to specific embodiments, and it should be understood that all changes, equivalents and substitutes included in the spirit and technical scope of the present invention are included.

[0054] The terms used in this application are only used to describe specific embodiments and are not used to limit the present invention. Unless the context clearly indicates otherwise, a singular expression may include a plural expression.

[0055] Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms defined in commonly used dictionaries may be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and unless explicitly defined in this application, are not interpreted as having an ideal or overly formal meaning.

[0056] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0057] Figure 1 Schematically showing a cross-sectional view of a cover window according to an embodiment of the present invention, Figure 2 A cross-sectional view showing a connection channel of a cover window according to an embodiment of the present invention, Figure 3 A diagram showing a partial back side of a rear side window glass of a vehicle to which a cover window according to an embodiment of the present invention is applied, Figure 4A 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 5 To schematically illustrate a cross-sectional view of a cover window including a front coating according to an embodiment of the present invention, Figure 6 2 is a diagram schematically showing a cross-sectional view of a cover window according to an embodiment of the present invention and a moving phenomenon of ultraviolet rays (a), visible rays (b), and infrared rays (c), Figure 7 2 is a cross-sectional view schematically showing a notch of a cover window according to an embodiment of the present invention. Figure 8 FIG. 1 is a schematic diagram showing a mold protrusion of an injection mold for forming a black layer in a cover window according to an embodiment of the present invention.

[0058] Reference Figures 1 to 8 According to an embodiment of the present invention, the cover window includes: a substrate layer, which is formed of a transparent plastic material; a black layer, which is stacked on one side of the substrate layer and formed around the substrate layer; an elastomer layer 200, which is formed in a manner of wrapping the substrate layer 110 and the black layer 120 together; a fixing component 300, which is separated from the elastomer layer 200 by a predetermined distance and formed above the black layer 120; and a back coating layer 400, which is stacked on a portion of the black layer 120 located between the elastomer layer 200 and the fixing component 300.

[0059] The cover window of the present invention can be used instead of vehicle glass and can be used for transparent exterior parts such as headlights, brake lights, etc. Moreover, the shape of the above-mentioned cover window can be changed according to the shape of the application position of the vehicle. That is, the shape of the cover window can be changed in various ways.

[0060] The substrate layer 110 may be made of at least one of PMMA (polymethylmethacrylate), PC (polycarbonate), PET (polyethylene terephthalate), PEN (polyethylene naphthalate) and CPI (colorless polyimide).

[0061] The substrate layer 110 is manufactured in the form of a plate by extruding a material to prevent problems such as deformation and birefringence, formability (film cracking and lack of elongation), etc. Also, the substrate layer 110 may be made of a PC material of a special color to reproduce the tinted color of the window glass.

[0062] More specifically, the substrate layer 110 includes 80 to 90 weight percent of PC (polycarbonate) resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of HALS (hindered amine light stabilizer), 1 to 3 weight percent of light stabilizer, and 0.1 to 5 weight percent of coating solvent.

[0063] The colored particles are particles of organic components and have high oil absorption, which can prevent the weather resistance and corrosion resistance of the coating from being reduced. The colored particles can have colors such as black, green, white or transparent. As an embodiment, the colored particles of the substrate layer 110 can have a transparent color.

[0064] Since the substrate layer 110 includes colored particle components, the light transmittance is greatly reduced in addition to the coloring purpose. Therefore, it not only has a light safety effect, such as yellowing and aging caused by ultraviolet rays, but also improves the effects of increased surface temperature, corresponding decreased adhesion, and decreased life of the coated surface due to infrared rays.

[0065] HALS (Hindered Amine Light Stabilizer, hereinafter referred to as HALS) is a UV light stabilizer that can prevent photo-oxidation by removing free radicals generated during the photolysis reaction. The substrate layer 110 can block light from entering the interior of the polymer material by using HALS, light stabilizers and colored particle components. This light blocking effect can minimize the impact of harmful light in the wavelength range of 290 to 400 nm that causes photo-oxidation degradation.

[0066] The black layer 120 is formed along the periphery of the base layer 110 to form an edge portion of the cover window. The shape of the black layer 120 may vary according to the shape of the cover window.

[0067] The black layer 120 includes 80 to 90 weight percent of PC (polycarbonate) resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of HALS (hindered amine light stabilizer), 1 to 3 weight percent of light stabilizer, 0.1 to 5 weight percent of coating solvent and 0.0001 to 5 weight percent of light shielding agent.

[0068] As an embodiment, the colored particles of the black layer 120 may have a black color. Since the black layer 120 includes colored particle components, the light transmittance is greatly reduced in addition to the coloring purpose, so it not only has a light safety effect such as yellowing and aging caused by ultraviolet rays, but also improves the effect of increasing the surface temperature due to infrared rays, the corresponding decrease in adhesion, and the decrease in the life of the coating surface.

[0069] The black layer 120 can block light from entering the interior of the polymer material by using HALS, light stabilizers and colored particle components. This light blocking effect can minimize the impact of harmful light in the wavelength range of 290 to 400 nm that causes photo-oxidative degradation.

[0070] The black layer 120 contains 0.0001 wt % to 5 wt % of carboxylic acid. Figure 4 When only the substrate layer 110 is present, ultraviolet rays (a) are blocked, but visible light (b) and infrared light (c) are transmitted. However, when the black layer 120 is stacked on the substrate layer 110, the transmittance of visible light (b) and infrared light (c) is reduced, thereby improving the light blocking effect.

[0071] The elastomer layer 200 is formed by wrapping the base layer 110 and the black layer 120. The elastomer layer 200 may be an elastomer resin, such as thermoplastic elastomer (TPE) or thermoplastic vulcanizate (TPV).

[0072] The black layer 120 may include a protrusion 121 protruding from one side of the black layer 120 and inserted into the elastic layer 200 . A plurality of protrusions 121 may be formed on one side of the black layer 120 .

[0073] As an embodiment, the elastomer layer 200 may be injection molded by flowing TPE resin between the plurality of protrusions 121. That is, due to the convex shape of the protrusions 121, when the elastomer layer 200 is insert-molded, the injection surface area may be increased, thereby increasing the bonding strength between the black layer 120 and the elastomer layer 200.

[0074] The fixing member 300 is spaced apart from the elastic layer 200 by a certain distance and is formed above the black layer 120. The fixing member 300 includes a positioning pin 310 and a fixing portion 320. The positioning pin 310 is disposed above the black layer 120.

[0075] More specifically, before the fixing portion 320 is injected, the positioning pin 310 is spaced a certain distance from the elastomer layer 200 and is disposed above the black layer 120. The fixing portion 320 is integrally injection-molded with the elastomer layer 200 via a connecting channel 500 disposed above the back coating layer 400. The fixing portion 320 fastens and fixes the positioning pin 310 to the black layer 120.

[0076] The back coating layer 400 is laminated on a portion of the black layer 120 between the elastomer layer 200 and the fixing member 300. The formation of the back coating layer 400 makes it easy to remove the connecting channel 500. That is, the back coating layer 400 is laminated on the black layer 120 in the area around the connecting channel 500, so that the injection resin is supplied through the connecting channel 500, and the connecting channel 500 is easy to remove after the fixing part 320 is insert-molded.

[0077] On the one hand, the black layer 120 is laminated on the substrate layer 110 by double injection molding or insert injection molding. In the injection mold 10 of the black layer 120, a mold protrusion 11 is formed corresponding to the position of the interface with the black layer 120 located on the inner surface of the substrate layer 110.

[0078] 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 on 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 injection-molded, the base layer 110 forms the notch 111 in a concave shape corresponding to the shape of the mold protrusion 11.

[0079] The formation of the notch 111 is to improve the problem that the black layer 120 intrudes into the substrate layer 110 due to the tolerance of the boundary surface between the substrate layer 110 and the black layer 120 when the black layer 120 is injected into the substrate layer 110. At this time, if the size of the notch 111 on the boundary surface between the substrate layer 110 and the black layer 120 is large, the appearance of the substrate layer 110 will bend and flash due to extrusion, resulting in quality problems on the boundary surface 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 boundary surface.

[0080] As an embodiment, the notch 111 may be formed with a thickness of 5% to 10% of the thickness of the black layer 120. If 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 poor, and if it exceeds 10%, quality problems such as marks on the surface of the base layer 110 may occur.

[0081] The cover window according to the embodiment of the present invention further includes a front coating layer 130 laminated on the other side of the substrate layer 110. The front coating layer 130 is a layer located on the surface of the substrate layer 110 to protect the substrate layer 110. To this end, the front coating layer 130 may be formed by coating an organic-inorganic hybrid compound as a coating liquid. At this time, the elastomer layer 200 is formed in a manner of wrapping the black layer 120, the substrate layer 110 and the front coating layer (130) together.

[0082] Moreover, the organic-inorganic hybrid compound can be formed by chemically bonding silica to epoxy resin. As the silica content increases, the hardness increases but the flexibility decreases; as the epoxy resin content increases, the flexibility increases but the hardness decreases. Therefore, the content of the epoxy resin and silica can be adjusted according to the application purpose.

[0083] Among them, the above-mentioned organic-inorganic hybrid compound can be formed by chemically bonding silicon dioxide to epoxy resin, rather than simply mixing.

[0084] Although a mixture of simply mixing epoxy resin and silica has the advantage of being easy to manufacture, it has the disadvantages of poor light transmittance, low surface hardness, and poor light resistance, weather resistance, and chemical resistance.

[0085] In contrast, although the chemical bonding of epoxy resin and silica has the disadvantage of difficult manufacturing, it has the advantages of ensuring a transmittance of more than 89%, excellent hardness and flexibility, excellent light resistance, weather resistance and chemical resistance, and no diffuse reflection and refraction.

[0086] Therefore, the cover window according to the embodiment of the present invention is formed by coating the front coating layer 130 chemically bonded by epoxy resin and silicon dioxide on the outer surface.

[0087] The front coating 130 and the back coating 400 include 30 to 50 weight percent of polyhedral oligomeric silsesquioxane (POSS), 20 to 30 weight percent of epoxy oligomers, 10 to 20 weight percent of epoxy monomers, 5 to 30 weight percent of nano-silica, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxides, 1 to 3 weight percent of ultraviolet absorbers, 1 to 3 weight percent of ultraviolet scatterers, 1 to 5 weight percent of light stabilizers, and 1 to 5 weight percent of other additives.

[0088] As an example, the front coating layer 130 may be formed to have a thickness of 10 μm to 20 μm. To this end, after the base layer 110 is coated with a coating liquid of an organic-inorganic hybrid compound, the coating liquid is flattened using a roller spaced 10 μm to 20 μm from the surface of the base layer 110, and then cured to form the front coating layer 130 having a thickness of 10 μm to 20 μm.

[0089] Moreover, ultraviolet rays with wavelengths of 365 to 395 nm can be used to treat 500 to 2000 mJ / cm 2 The coating liquid is cured by irradiating with a light amount of

[0090] In a cover window according to an embodiment of the present invention, the front coating 130 is stacked on the other side of the substrate layer 110, so that the visible light (b) transmittance is reduced from 88.5% to 59.2%, and the infrared light (c) shading rate is increased from 10% to 22%, which can not only improve the shading effect, but also improve the safety caused by light transmittance and physical properties such as weather resistance and wear resistance.

[0091] Fig. 9 FIG. 1 is a flow chart schematically illustrating a method for manufacturing a cover window according to an embodiment of the present invention.

[0092] Reference Fig. 9 , the manufacturing method of the cover window according to 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 along the periphery of the substrate layer 110; a back coating forming step S300, forming a laminated back coating 400 on a part of the surface of the black layer 120; an elastomer layer forming step S400, forming an elastomer layer 200 in a manner of wrapping the substrate layer 110 and the black layer 120 together; and a fixing component forming step S500, which is formed simultaneously with the elastomer layer forming step and is separated from the elastomer layer 200 by a certain distance, so as to form a fixing component 300 above the black layer 120.

[0093] In the substrate layer forming step S100, the substrate layer 110 includes 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0094] In the black layer forming step S200, the black layer 120 is laminated on the substrate layer 110 by double injection molding or insert injection molding. The black layer forming step S300 is a step of forming the black layer 120 around the substrate layer 110, and is a step of forming the edge portion of the cover window.

[0095] In the black layer forming step S200, the mold protrusion 11 is disposed at a position in the injection mold 10 corresponding to the boundary surface of the black layer 120 located on the inner surface of the base layer 110, so that a notch 111 corresponding to the shape of the mold protrusion 11 is formed in the base layer 110. At this time, as an embodiment, the notch 111 can be formed with a thickness of 5% to 10% of the thickness of the black layer 120.

[0096] In the black layer forming step S200 , when the black layer is laminated on the base layer 110 by double injection molding, the black layer 120 as the second injection molding product is sequentially injected and laminated on one side of the base layer 110 as the first injection molding product.

[0097] In the black layer forming step S200, when the black layer is laminated on the substrate layer 110 by insert injection molding, after the substrate layer 110 as the first injection molding product is sufficiently cooled after injection molding, the black layer 120 as the second injection molding product is injected and laminated on one side of the above-mentioned substrate layer 110. In this case, when the first injection molding product is embedded in the injection mold 10 for the second injection molding, problems may occur due to the mismatch between the shape of the first injection molding product and the shape of the second injection mold 10. In order to improve this, if the thickness of the first injection molding product is 2.5 to 4.5t, it can be preheated to 100 to 120°C in an oven at 120 to 150°C and then placed in the second injection mold 10 for insert injection molding. In this way, the occurrence of scratches on the surface of the cover window and flashes of the substrate layer 110 and the black layer 120 can be improved.

[0098] In the above-mentioned black layer forming step S200, the above-mentioned black layer 120 includes 80 weight percent to 90 weight percent of PC (polycarbonate) resin, 1 weight percent to 5 weight percent of colored particles, 1 weight percent to 3 weight percent of HALS (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.

[0099] After the black layer forming step S200 is performed, a back coating forming step S300 is performed to form a back coating 400 laminated on a portion of the black layer 120. In the back coating forming step S300, the back coating 400 is laminated on the black layer 120 in the area around the connecting channel 500.

[0100] After performing the back coating forming step S300, the elastomer layer forming step S400 and the fixing component forming step S500 are performed. The elastomer layer forming step S400 and the fixing component forming step S500 can be performed simultaneously. More specifically, in the elastomer layer forming step S400 and the fixing component forming step S500, the elastomer layer 200 and the fixing component 300 can be formed by insert molding at the same time.

[0101] The above-mentioned fixing component forming step S500 includes: a positioning pin embedding step, configuring a positioning pin 310 above the above-mentioned black layer 120; and a fixing part forming step, integrally injecting the above-mentioned elastomer layer through a connecting channel 500 configured above the above-mentioned back coating 400, and fastening the above-mentioned positioning pin 310 to the above-mentioned black layer 120 to form a fixing part 320.

[0102] In the step S400 of forming the elastomer layer and the step S500 of forming the fixing part, the positioning pin 310 is spaced a certain distance from the elastomer layer and pre-placed above the black layer before the fixing part 320 is injected. At this time, the fixing part 320 is integrally injection-molded with the elastomer layer through the connecting channel 500 disposed above the back coating layer 400.

[0103] In the fixing component forming step S500 , the injection resin is supplied through the connecting channel 500 , and after the fixing portion 320 is insert-molded, the connecting channel 500 may be removed.

[0104] On the one hand, in the black layer forming step S200 , the black layer 120 forms a protrusion 121 that protrudes from one surface of the black layer 120 and is inserted into the elastic layer 200 and is combined.

[0105] In the elastomer layer forming step S400, the elastomer layer 200 is formed by wrapping the other side of the substrate layer 110 and the one side of the black layer 120 together. In the product of performing the black layer forming step S200, the elastomer layer 200 can be formed by insert molding. As an embodiment, the elastomer layer forming step S400 can be a step of injection molding the elastomer layer 200 by flowing a TPE resin between the plurality of protrusions 121.

[0106] The manufacturing method of the cover window according to an embodiment of the present invention may further include a front coating forming step of forming a front coating 130 on the other side of the substrate layer 110. After the black layer forming step S200 is performed, after the front coating 130 is formed through the front coating forming step, 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 front coating 130 together.

[0107] In the front coating forming step, the front coating 130 is formed by applying a coating liquid as an organic-inorganic hybrid compound to the substrate layer 110. The front coating forming step can be performed by directly coating the coating liquid on the substrate layer 110, and then planarizing and curing it to directly coat the substrate layer 110.

[0108] The coating liquid is applied by using an organic-inorganic hybrid compound in which silica is chemically bonded to an epoxy resin. As the silica content increases, the hardness increases but the flexibility decreases; as the epoxy resin content increases, the flexibility increases but the hardness decreases. Therefore, the content of the epoxy resin and silica can be adjusted according to the application purpose.

[0109] Furthermore, when the coating liquid is planarized, the coating liquid applied on the base layer 110 is planarized using a roller or a steel plate to have a certain thickness.

[0110] When curing the coating liquid, the coating liquid applied to the base material layer 110 may be cured by UV irradiation. More specifically, the curing may be performed by ultraviolet rays with a wavelength of 365 to 395 nm at 500 to 2000 mJ / cm 2 The curing is achieved by irradiating with an amount of light.

[0111] On the one hand, in the front coating forming step, the front coating 130 includes 30 weight percent to 50 weight percent of polyhedral oligomeric silsesquioxane (POSS), 20 weight percent to 30 weight percent of epoxy oligomers, 10 weight percent to 20 weight percent of epoxy monomers, 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 oxides, 1 weight percent to 3 weight percent of ultraviolet absorbers, 1 weight percent to 3 weight percent of ultraviolet scatterers, 1 weight percent to 5 weight percent of light stabilizers, and 1 weight percent to 5 weight percent of other additives.

[0112] The present invention has been described in detail above through specific embodiments, but this is only for specific illustration of the present invention and the present invention is not limited thereto. It is obvious that a person skilled in the art can modify or improve the present invention within the scope of the technical idea of ​​the present invention.

[0113] All simple modifications or variations of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will become clear through the appended claims.

[0114] Description of Reference Numerals

[0115] 10: Injection mold 11: Mold protrusion

[0116] 110: base material layer 111: notch

[0117] 120: Black layer 121: Protrusion

[0118] 130: front coating 200: elastomer layer

[0119] 300:Fixed component 310:Locking pin

[0120] 320:Fixing part 400:Back coating

[0121] 500: Connection channel.

Claims

1. A cover window, characterized in that: include: A substrate layer, which is formed of a transparent plastic material; A black layer, which is laminated on one side of the substrate layer and formed along the periphery of the substrate layer; an elastic layer formed in such a manner as to wrap the base material layer and the black layer together; a fixing member which is spaced a certain distance from the elastomer layer and formed above the black layer; as well as A back coating layer is laminated on a portion of the black layer located between the elastomer layer and the fixing member.

2. The cover window according to claim 1, wherein: The above-mentioned fixing parts include: A positioning pin disposed above the black layer; and The fixing part is integrally injection-molded with the elastomer layer through a connecting channel arranged above the back coating layer, and the positioning pin is fastened to the black layer.

3. The cover window according to claim 1, characterized in that: The black layer forms a protrusion that protrudes from one surface of the black layer and is connected so as to be inserted into the elastic layer.

4. The cover window according to claim 1, wherein: The black layer is laminated on the base 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 base layer.

5. The cover window according to claim 4, characterized in that: The base material layer has a notch formed therein corresponding to the shape of the mold protrusion.

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

7. The cover window according to claim 1, wherein: 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.

8. The cover window according to claim 1, wherein: The above black layer 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, 0.1 to 5 weight percent of a coating solvent, and 0.0001 to 5 weight percent of a light shielding agent.

9. The cover window according to claim 1, wherein: Also includes a front 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 front coating layer.

10. The cover window according to claim 8, wherein: Also includes a front coating layer laminated on the other side of the substrate layer; The front coating and the back coating include: 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.

11. A method for manufacturing a cover window, comprising: A substrate layer forming step, forming a substrate layer formed of a transparent plastic material; A black layer forming step, which forms a black layer on one side of the substrate layer along the periphery of the substrate layer; a back coating forming step of forming a laminated back coating on a portion of the surface of the black layer; an elastic body layer forming step of forming an elastic body layer in a manner of wrapping the base layer and the black layer together; and A fixing component forming step is formed simultaneously with the elastic layer forming step and is spaced a certain distance from the elastic layer so as to form the fixing component above the black layer.

12. The method for manufacturing a cover window according to claim 11, wherein: The above-mentioned fixing component forming step comprises: A positioning pin embedding step of disposing positioning pins above the black layer; and The fixing portion forming step is to form a fixing portion by integrally injecting the connecting channel placed above the back coating layer with the elastomer layer and fastening the positioning pin to the black layer.

13. The method for manufacturing a cover window according to claim 11, wherein: In the above black layer forming step, The black layer has a protrusion formed therein that protrudes from one surface of the black layer and is connected so as to be inserted into the elastic layer.

14. The method for manufacturing a cover window according to claim 11, wherein: In the above black layer forming step, The black layer is laminated on the base 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 base layer.

15. The method for manufacturing a cover window according to claim 14, wherein: In the above black layer forming step, The base material layer has a notch formed therein corresponding to the shape of the mold protrusion.

16. The method for manufacturing a cover window according to claim 15, wherein: The notch is formed with a thickness of 5% to 10% of the thickness of the black layer.

17. The method for manufacturing a cover window according to claim 11, wherein: In the above-mentioned base material layer forming step, The substrate layer comprises: 80 to 90 weight percent of polycarbonate resin, 1 to 5 weight percent of colored particles, 1 to 3 weight percent of hindered amine light stabilizer, 1 to 3 weight percent of light stabilizer and 0.1 to 5 weight percent of coating solvent.

18. The method for manufacturing a cover window according to claim 11, wherein: In the above black layer forming step, 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 light shielding agent.

19. The method for manufacturing a cover window according to claim 11, wherein: The method further comprises a front coating forming step of forming a front coating 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 front coating layer.

20. The method for manufacturing a cover window according to claim 17, wherein: The method further comprises a front coating forming step of forming a front coating on the other side of the substrate layer after the black layer forming step; In the above-mentioned front coating forming step and the above-mentioned back coating forming step, The front coating and the back coating include 30 to 50 weight percent of polyhedral oligomeric silsesquioxane, 20 to 30 weight percent of epoxy oligomers, 10 to 20 weight percent of epoxy monomers, 5 to 30 weight percent of nano-silicon dioxide, 5 to 10 weight percent of silicone oil, 1 to 5 weight percent of metal oxides, 1 to 3 weight percent of ultraviolet absorbers, 1 to 3 weight percent of ultraviolet scatterers, 1 to 5 weight percent of light stabilizers, and 1 to 5 weight percent of other additives.

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