Coating material, profile and repair method therefor

Abstract

A coating material, a profile and a repair method therefor. The coating material is used to adhere a profile body and an ink layer, and the coating material comprises an acrylic resin, an epoxy resin and an active auxiliary agent. The coating material is adhesive, is used to adhere the profile body and the ink layer, and has relatively high reliability.

Description

Coating material, profile and repair method thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 15, 2023, with application number 202310713602.0 and invention name “Coating materials, profiles and their repair methods”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of metal processing, and in particular to a coating material, a profile and a repair method thereof. Background Art

[0003] Profiles are solid straight bars of metal formed through plastic processing to have a specific cross-sectional shape and size. Profiles come in a wide variety of sizes and specifications, and are widely used, playing a crucial role in rolling production.

[0004] Take aluminum alloy profiles as an example, such as Al6061, Al6063 or Al6013. This aluminum alloy profile has the characteristics of light weight and strong metallic feel, especially in terms of formability, mechanical surface treatment and anodizing. Therefore, the display frames of products such as TV, all-in-one commercial display machines, and smart education machines are often made of aluminum alloy profiles. As the display frame of a TV or an all-in-one commercial display machine, the size of the display frame is relatively large. There are currently two processing routes in the industry. One is the traditional process route: first, the aluminum alloy profile is processed into a three-frame or four-frame structure such as a "door shape" through bending, welding and other processes, and then the appearance surface of the three-frame or four-frame structure is subjected to mechanical surface treatment such as sandblasting or brushing, and finally anodized. Due to the limitations of the large-size structure, the efficiency of processing methods such as mechanical surface treatment and anodizing is very low. The other is a novel process: Long aluminum alloy profiles are first subjected to mechanical surface treatment (brushing, sandblasting, etc.) and pre-anodized, and then bent, welded, and other forming processes to create a "door-shaped" three- or four-frame structure. By moving the anodizing process to before the bending process, this novel process eliminates the limitations of frame size on the oxidation equipment, allowing long aluminum alloy profiles to be stacked in layers in the oxidation tank. This increases production capacity by three to four times and significantly reduces overall costs.

[0005] While the novel process increases production capacity and reduces costs, a key appearance issue remains unresolved. The aluminum alloy profile is first oxidized and then bent into shape. However, during the bending process, a certain proportion of damaged areas, such as the R corners, may remain at the bends, requiring repair. This can lead to appearance issues such as the bends appearing white and colorless, or exposing the metal base. Furthermore, moisture, oxygen, or corrosive gases in the air can easily intrude into the interior of the aluminum alloy profile through the damaged areas at the bends, making it impossible to guarantee the corrosion resistance of the aluminum alloy profile.

[0006] In the related art, an ink layer is directly formed on the damaged area of ​​the profile. Since the damaged area of ​​the aluminum profile is easily adsorbed with water vapor and pollutants in the air, it is not conducive to the adhesion of the ink to the surface of the aluminum profile, resulting in the risk of the ink layer falling off and reduced safety and reliability. Technical issues

[0007] In the related art, an ink layer is directly formed on the damaged area of ​​the profile. Since the damaged area of ​​the aluminum profile is easily adsorbed with water vapor and pollutants in the air, it is not conducive to the adhesion of the ink to the surface of the aluminum profile, resulting in the risk of the ink layer falling off and reduced safety and reliability. Technical Solutions

[0008] In a first aspect, the present application provides a coating material, which is used to adhere to a profile body and an ink layer, and the coating material includes acrylic resin, epoxy resin, and an active auxiliary agent.

[0009] In a second aspect, the present application further provides a profile, comprising:

[0010] A profile body, wherein the profile body has an area to be repaired;

[0011] A primer layer, the primer layer being disposed on the area to be repaired, the primer layer being formed of a coating material comprising an acrylic resin, an epoxy resin, and an active auxiliary agent;

[0012] An ink layer is provided on a side of the primer layer away from the profile body to cover the area to be repaired; wherein the primer layer is used to adhere the profile body and the ink layer.

[0013] In a third aspect, the present application further provides a method for repairing a profile, which comprises:

[0014] Providing a profile body;

[0015] Identifying the area to be repaired of the profile body;

[0016] Disposing a coating material on the area to be repaired to form a primer layer, wherein the coating material comprises acrylic resin, epoxy resin and an active auxiliary agent;

[0017] providing an ink layer on the primer layer to cover the area to be repaired;

[0018] Wherein, the primer layer is used to adhere the profile body and the ink layer. Beneficial effects

[0019] The present invention provides a coating material, profile, and repair method thereof. The coating material is used to adhere to the profile body and ink layer. The coating material comprises an acrylic resin, an epoxy resin, and an active agent. The coating material can adhere to the profile body and the ink layer, thereby repairing the profile body and improving the profile body's corrosion resistance. The coating material is connected to the profile body on one hand and to the ink layer on the other hand, improving the adhesion of the ink layer to the profile body and enhancing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the forming process of the profile body in the related art provided in an embodiment of the present application.

[0021] FIG2 is a schematic structural diagram of the profile body and the ink layer provided in an embodiment of the present application.

[0022] FIG3 is a schematic structural diagram of the profile provided in an embodiment of the present application.

[0023] FIG4 is a schematic diagram of the repair process of the profile body provided in an embodiment of the present application.

[0024] FIG5 is a schematic diagram of a first flow chart of a method for repairing a profile provided in an embodiment of the present application.

[0025] FIG6 is a first process flow chart of the ink layer formation process provided in an embodiment of the present application.

[0026] FIG. 7 is a second process flow chart of the ink layer formation process provided in an embodiment of the present application.

[0027] FIG8 is a second flow chart of the method for repairing a profile provided in an embodiment of the present application.

[0028] Implementation Methods of the Application

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0030] Bending refers to the process in which a metal sheet undergoes elastic deformation and then plastic deformation under the pressure of the upper or lower die of a press brake. At the beginning of plastic bending, the sheet is free to bend. As the upper or lower die applies pressure to the sheet, the sheet gradually comes close to the inner surface of the lower die groove. At the same time, the radius of curvature and the bending arm gradually decrease. The pressure is continued until the stroke ends, so that the upper and lower dies are in full contact with the sheet at three points. At this time, the bending is completed, which is commonly known as bending.

[0031] Please refer to FIG1 , which is a schematic diagram of the forming process of the profile body in the related art provided in an embodiment of the present application.

[0032] Among them, take the aluminum alloy profile body 10 as an example, such as Al6061, Al6063 or Al6013. The aluminum alloy profile body 10 has the characteristics of light weight and strong metallic feel, especially in terms of formability, mechanical surface treatment and anodizing. Therefore, the display frames of products such as TV, commercial display all-in-one machine, smart education machine, etc. are often made of the aluminum alloy profile body 10. As the display frame of TV or commercial display all-in-one machine, the size of the display frame is relatively large. There are currently two processing routes in the industry. One is the traditional process route: first, the aluminum alloy profile body 10 is processed into a three-frame or four-frame structure such as a "door shape" through bending, welding and other processes, and then the appearance surface of the three-frame or four-frame structure is subjected to mechanical surface treatment such as sandblasting or brushing, and finally anodized. Due to the limitation of the large-size structure, the efficiency of processing methods such as mechanical surface treatment and anodizing in this traditional process route is very low. The other is a new process route, as shown in Figure 1: (1) First, the long strip of aluminum alloy profile body 10 is subjected to mechanical surface treatment (brushing, sandblasting, etc.), and then pre-folding lines are formed on the profile body 10; (2) The profile body 10 is then anodized and colored with ink; (3) Finally, bending, welding and other forming processes are performed to obtain a "door-shaped" three-frame or four-frame structure. It can be seen that this new process route advances the anodizing process of the aluminum alloy profile body 10 to before the bending process. The oxidation equipment is no longer limited by the size of the frame structure. The long strip of aluminum alloy profile body 10 can be placed in the oxidation tank in a stacked manner, and the production capacity is increased by 3 to 4 times, and the overall cost is also greatly reduced.

[0033] Although the above-mentioned new process route has increased production capacity and reduced costs, there is a key appearance problem that has not been effectively solved. The aluminum alloy profile body 10 is first oxidized and then bent into shape. However, during the bending process of the aluminum alloy profile body 10, as shown in Figure 1 (3), a certain proportion of damaged areas, such as the R corners, will exist at the bend 11, i.e., the area to be repaired, resulting in appearance problems such as the bend 11 being white and colorless or the metal base being exposed; and, because water vapor, oxygen, or corrosive gases in the air can easily invade the interior of the profile body 10 from the damaged area of ​​the bend 11, the corrosion resistance of the profile body 10 cannot be guaranteed.

[0034] In the technical solution of the related art, when the finished aluminum alloy profile body 10 is designed to have a silvery-white exterior color, since aluminum is also silvery-white, even if the bend 11 of the aluminum alloy profile body 10 is damaged, it is not visually noticeable, and the impact on the appearance is minimal. However, the exterior color of the aluminum alloy profile body 10 in the related art can only be selected from the silver series. If the exterior color is dark, the damaged area will be exposed white or the metal base material will be exposed, resulting in a significant color contrast and appearance problems.

[0035] In other related technologies, aluminum alloy profiles are repaired by processes such as stripping, grinding and re-oxidation. This related technology is time-consuming, labor-intensive and costly.

[0036] The present invention provides a coating material, a profile, and a repair method thereof. The coating material is viscous and is used to adhere to the profile body and the ink layer, and has high reliability. Detailed description is provided below with reference to the accompanying drawings.

[0037] Please refer to Figure 2, which is a schematic structural diagram of the profile body and ink layer provided in an embodiment of the present application.

[0038] The present application provides a coating material, which is used to adhere the profile body 10 and the ink layer 40. The coating material includes acrylic resin, epoxy resin and an active auxiliary agent.

[0039] The acrylic resin and epoxy resin have a film-forming effect and can form a uniform and dense film layer on the surface of the profile body 10, such as the area to be repaired of the profile body 10. The active auxiliary agent can enhance the film-forming property and adhesion of the acrylic resin and epoxy resin. The active auxiliary agent can be an amphoteric surfactant, a cationic surfactant and a non-ionic surfactant, such as metal oxides, hydroxides, basic carbonates, fatty acids, amines, polyols, and amino alcohols. The active auxiliary agent can be a single chemical substance or several chemical substances, such as sodium hydroxide, or a mixture of sodium hydroxide and sodium carbonate. Among them, the active auxiliary agent can be a silane coupling agent. The silane coupling agent has an inorganic-philic group and an organic-philic group. The inorganic-philic group of the silane coupling agent is combined with the surface of the filler, and the organic-philic group is entangled or reacted with the polymer resin. Therefore, the active auxiliary agent can improve the adhesion of the primer 30 on the profile body 10.

[0040] The coating material provided in the embodiments of the present application is used to adhere to the profile body 10 and the ink layer 40. The coating material comprises an acrylic resin, an epoxy resin, and an active agent. The coating material adheres to the profile body 10 and the ink layer 40, repairing the profile body 10 and improving its corrosion resistance. The coating material is connected to the profile body 10 on one hand and to the ink layer 40 on the other, improving the adhesion of the ink layer 40 to the profile body 10 and enhancing reliability.

[0041] In some embodiments, the coating material further includes an organic solvent, which is used to dissolve the acrylic resin, the epoxy resin, and the active auxiliary agent.

[0042] The organic solvent must have volatility, fluidity, dispersibility, and solubility. The organic solvent is used to dissolve acrylic resin and epoxy resin. The organic solvent can be a medium-to-low boiling point solvent, for example, a boiling point of less than or equal to 140°C. The organic solvent can be one or more of isopropyl alcohol, xylene, cyclohexane, and ethyl acetate. Among them, the boiling point of isopropyl alcohol is 82.5°C (degrees Celsius), the boiling point of xylene is 137°C to 140°C, the boiling point of cyclohexane is 80.7°C, and the boiling point of ethyl acetate is 76.5°C to 77.5°C.

[0043] For example, the organic solvent is xylene, which has a strong solubility in acrylic resin and epoxy resin, can prevent the coating material from precipitating, and can improve the fluidity of the coating film of the coating material on the profile body 10. The organic solvent can be a mixture of isopropyl alcohol, xylene, cyclohexane and ethyl acetate, wherein isopropyl alcohol, cyclohexane and ethyl acetate have a low boiling point, low viscosity and fast evaporation rate, which can assist in diluting and dispersing the material and quickly dry the coating film. If the chemical type of the organic solvent is single, the functions that the organic solvent can achieve are relatively few, but the cost is low. When the organic solvent contains multiple chemical substances, the functions of the organic solvent are diverse. It is understandable that when the organic solvent includes isopropyl alcohol, xylene, cyclohexane and ethyl acetate, the organic solvent has higher volatility, higher fluidity, higher dispersibility and better solubility in acrylic resin, epoxy resin and active additives.

[0044] Furthermore, cyclohexane, isopropyl alcohol, and ethyl acetate as diluents can improve the dispersibility of acrylic resin, epoxy resin, and coagents. Furthermore, due to their low viscosity and high volatility, cyclohexane, isopropyl alcohol, and ethyl acetate accelerate the drying speed of the coating material after application to the profile body 10. Xylene, with its relatively high boiling point and strong resin solubility, can prevent precipitation when acrylic resin, epoxy resin, and coagents are dissolved in organic solvents. Furthermore, isopropyl alcohol, xylene, cyclohexane, and ethyl acetate as solvents can enhance the leveling properties of the coating material after application to the profile body 10, resulting in superior film-forming properties.

[0045] In some cases, the composition of the organic solvent includes, by mass percentage, 25% to 50% isopropyl alcohol, 15% to 35% xylene, 5% to 15% cyclohexane, and 1% to 10% ethyl acetate. It is understood that this ratio of the organic solvent components allows for high volatility, high fluidity, high dispersibility, and strong solubility in acrylic resins and epoxy resins, while also enabling cleaning of the surface of the profile body 10.

[0046] In some embodiments, the coating material comprises, by weight, 91% to 97.9% organic solvent, 1% to 7% acrylic resin, 0.8% to 1% epoxy resin, and 0.3% to 1% active agent. The coating material with the aforementioned ratios exhibits both good ductility and good adhesion.

[0047] Please continue to refer to Figures 2 and 3. Figure 3 is a schematic structural diagram of a profile provided in an embodiment of the present application. This embodiment of the present application also provides a profile 1, which includes a profile body 10, a primer 30, and an ink layer 40. The profile body 10 has an area to be repaired 20. The primer 30 is disposed on the area to be repaired 20, and the primer 30 is formed from the coating material of the above-mentioned embodiment. The ink layer 40 is disposed on a side of the primer 30 away from the profile body 10 to cover the area to be repaired 20. The primer 30 is used to adhere the profile body 10 and the ink layer 40.

[0048] The profile body 10 can be made of aluminum alloy, other metals, and their alloys. For example, aluminum alloy can be used as an extruded aluminum alloy profile body 10. The extruded aluminum alloy profile body 10 is formed by extruding an aluminum alloy ingot through an extruder and an extrusion die to form an aluminum alloy extruded profile body 10 having a mid-frame cross-section. The extruded aluminum alloy profile body 10 is then cut. The extruded aluminum alloy profile body 10 can then be brushed or sandblasted to create a brushed or sandblasted effect on the surface of the extruded aluminum alloy profile body 10.

[0049] Subsequently, a dense and porous anodic oxide film can be formed on the surface of the aluminum alloy extruded profile body 10 by chemical oxidation or anodic oxidation. The aluminum alloy extruded profile body 10 can be bent, welded, and other forming processes to obtain a "door-shaped" structure display frame.

[0050] Please continue to refer to Figures 1 and 4. Figure 4 is a schematic diagram of the repair process of the profile body provided in an embodiment of the present application. After the aluminum alloy extruded profile body 10 is bent, an R-angle appearance surface is formed at the bent portion. The R-angle appearance surface refers to the portion of the "door-shaped" frame where the R-angles of the two bends 11 are observable when in use. The area to be repaired 20 can be located at the bend 11 of the profile body 10, that is, at the R-angle of the profile body 10.

[0051] The surface of the profile body 10 may have cracks or damages in the anodic oxide film, revealing the alloy underneath the anodic oxide film. This surface is the area to be repaired 20. The profile body 10 can be repaired by identifying the area to be repaired 20.

[0052] During the process of repairing the area to be repaired 20 of the profile body 10, a primer layer 30 is provided on the area to be repaired 20. The primer layer 30 can completely cover the area to be repaired 20. The thickness of the primer layer 30 is uniform, about 0.5 to 5 μm. The primer layer 30 can be a transparent liquid. When the primer layer 30 is a transparent liquid, the primer layer 30 can not only completely cover the area to be repaired 20, but also exceed the edge of the area to be repaired 20, for example, exceed the edge of the area to be repaired by 0.5 mm (millimeter) to 1.5 mm, so as to completely cover the area to be repaired 20. Since the primer layer 30 is a transparent liquid, the primer layer 30 exceeding the edge of the area to be repaired 20 can also ensure the integrity of the appearance of the profile body 10.

[0053] An ink layer 40 is formed on the primer layer 30 to cover the area to be repaired 20. It is understood that the color of the ink layer 40 can be the same as the color of the outer surface of the profile body 10, so that the repair of the area to be repaired 20 does not visually reveal cracks or damage to the oxide film of the profile body 10. Furthermore, because cracks or damage in the oxide film of the profile body 10 are covered by the ink layer 40, external moisture, oxygen, and corrosive gases are less likely to enter the interior of the profile body 10 through the cracks or damage, thereby improving the corrosion resistance of the profile body 10.

[0054] Therefore, the ink layer 40 can cover and repair the area 20 to be repaired of the profile body 10, so as to repair the area 20 to be repaired of the profile body 10; the primer layer 30, on the one hand, grips the profile body 10, and on the other hand, grips the ink layer 40, thereby improving the adhesion of the ink layer 40 to the profile body 10, making it difficult for the ink layer 40 to fall off from the profile body 10, thereby increasing reliability.

[0055] The material of the ink layer 40 includes a polyurethane acrylate resin and a reactive diluent. The reactive diluent is a monofunctional acrylate or a multifunctional acrylate; the reactive diluent can be one or more of isobornyl (meth)acrylate, isooctyl (meth)acrylate, dodecyl (meth)acrylate, isodecyl (meth)acrylate, caprolactone (meth)acrylate, hydroxyethyl (meth)acrylate, C16-C18 methacrylate, stearic acid methacrylate, 2-ethylhexyl methacrylate, hexanediol diacrylate, polyethylene glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane propoxylate triacrylate, or pentaerythritol propoxylate tetraacrylate.

[0056] The thickness of the primer layer 30 is 0.5 μm (micrometer) to 5 μm. For example, the thickness of the primer layer 30 is 3 μm. When the thickness of the primer layer 30 is within the above value, the primer layer 30 can enhance the reliability of adhesion to the profile body 10 and the ink layer 40, while not being too thick to form a noticeable protrusion on the profile body 10, affecting the appearance.

[0057] The ink layer 40 has a thickness of 5 to 20 μm. For example, the ink layer 40 has a thickness of 15 μm. When the ink layer 40 has this thickness, it can mask color unevenness caused by cracks or damage on the oxide film of the profile body 10 while also preventing the ink layer 40 from forming noticeable protrusions on the profile body 10 that would affect the appearance.

[0058] Please continue to refer to Figures 3 and 5. Figure 5 is a schematic flow chart of the first method for repairing a profile provided in an embodiment of the present application. An embodiment of the present application also provides a method for repairing a profile 1. The method for repairing the profile 1 includes the following steps: S1. Providing a profile body 10; S2. Confirming the area 20 to be repaired of the profile body 10; S3. Disposing the coating material in the above embodiment on the area 20 to be repaired to form a primer 30; S4. Disposing an ink layer 40 on the primer 30 to cover the area 20 to be repaired. The primer 30 is capable of adhering to the profile body 10 and the ink layer 40.

[0059] In some embodiments, the material of the base coating 30 includes acrylic resin, epoxy resin, and an active auxiliary agent.

[0060] The step of disposing a coating material on the area to be repaired 20 to form a primer layer 30 includes disposing a coating material on the area to be repaired 20 to form a primer layer 30. The coating material includes acrylic resin, epoxy resin and an active agent.

[0061] The acrylic resin and epoxy resin possess film-forming properties, forming a uniform, dense film layer on the repaired area 20. The active agent enhances the film-forming and adhesion properties of the acrylic resin and epoxy resin. The active agent may be an amphoteric surfactant, a cationic surfactant, or a nonionic surfactant, such as metal oxides, hydroxides, basic carbonates, fatty acids, amines, polyols, or amino alcohols. The active agent may be a single chemical substance or multiple chemical substances, such as sodium hydroxide or a mixture of sodium hydroxide and sodium carbonate.

[0062] The coating material further comprises an organic solvent, which is used for dissolving acrylic resin, epoxy resin and active auxiliary agent.

[0063] The organic solvent must have volatility, fluidity, dispersibility and solubility. The organic solvent is used to dissolve acrylic resin and epoxy resin. The organic solvent can be a medium-low boiling point solvent, for example, a boiling point less than or equal to 140°C. The organic solvent can be one or more of isopropyl alcohol, xylene, cyclohexane and ethyl acetate. Among them, the boiling point of isopropyl alcohol is 82.5°C, the boiling point of xylene is 137°C to 140°C, the boiling point of cyclohexane is 80.7°C, and the boiling point of ethyl acetate is 76.5°C to 77.5°C. Among them, the active auxiliary agent can be a silane coupling agent. The silane coupling agent has an inorganic-philic group and an organic-philic group. The inorganic-philic group of the silane coupling agent is combined with the surface of the filler, and the organic-philic group is entangled or reacted with the polymer resin. Therefore, the active auxiliary agent can improve the adhesion of the primer 30 on the profile.

[0064] In which, the coating material is set on the area to be repaired 20 to form a primer layer 30. The repair method of the profile 1 includes applying the coating material on the area to be repaired 20, and the coating material also includes an organic solvent; drying the coating material so that the organic solvent evaporates to form a primer layer 30 on the area to be repaired 20.

[0065] The components of the coating material, calculated by mass percentage, include: organic solvent: 91% to 97.9%; acrylic resin: 1% to 7%; epoxy resin: 0.8% to 1%; and active agent: 0.3% to 1%.

[0066] The coating material may be applied to the area to be repaired 20 by using a flat-head primer pen or a roller to evenly apply the coating material to the area to be repaired 20 .

[0067] The organic solvent must have volatility, fluidity, dispersibility, and solubility. The organic solvent is used to dissolve acrylic resin and epoxy resin. The organic solvent can be a medium-to-low boiling point solvent, for example, a boiling point of less than or equal to 140°C. The organic solvent can be one or more of isopropyl alcohol, xylene, cyclohexane, and ethyl acetate. Among them, the boiling point of isopropyl alcohol is 82.5°C (degrees Celsius), the boiling point of xylene is 137°C to 140°C, the boiling point of cyclohexane is 80.7°C, and the boiling point of ethyl acetate is 76.5°C to 77.5°C.

[0068] For example, the organic solvent is xylene, which has a strong solubility in acrylic resin and epoxy resin, can prevent the coating material from precipitating, and can improve the fluidity of the coating film of the coating material on the profile body 10. The organic solvent can be a mixture of isopropyl alcohol, xylene, cyclohexane and ethyl acetate, wherein isopropyl alcohol, cyclohexane and ethyl acetate have a low boiling point, low viscosity and fast evaporation rate, which play a role in assisting the dilution and dispersion of the material and accelerating the drying of the coating film. If the chemical type of the organic solvent is single, the functions that the organic solvent can achieve are relatively few. When the organic solvent contains multiple chemical substances, the functions of the organic solvent are diverse. It is understandable that when the organic solvent includes isopropyl alcohol, xylene, cyclohexane and ethyl acetate, the organic solvent has higher volatility, higher fluidity, higher dispersibility and better solubility in acrylic resin, epoxy resin and active additives.

[0069] Furthermore, cyclohexane, isopropyl alcohol, and ethyl acetate as diluents can improve the dispersibility of acrylic resin, epoxy resin, and coagents. Furthermore, due to their low viscosity and high volatility, cyclohexane, isopropyl alcohol, and ethyl acetate accelerate the drying speed of the coating material after application to the profile body 10. Xylene, with its relatively high boiling point and strong resin solubility, can prevent precipitation when acrylic resin, epoxy resin, and coagents are dissolved in organic solvents. Furthermore, isopropyl alcohol, xylene, cyclohexane, and ethyl acetate as solvents can enhance the leveling properties of the coating material after application to the profile body 10, resulting in superior film-forming properties.

[0070] The coating material is dried to volatilize the organic solvent, thereby forming a primer layer 30 on the area to be repaired 20. For example, after the coating material is evenly coated on the area to be repaired 20, the primer surface is dried using hot air at a drying temperature of 50°C to 80°C for 3 to 5 minutes to fully dry the surface and form a uniform film, thereby forming the primer layer 30. For another example, after the coating material is evenly coated on the area to be repaired 20, the solvent in the coating material evaporates at room temperature to form the primer layer 30.

[0071] In some cases, the organic solvent comprises, by weight, 25% to 50% isopropyl alcohol, 15% to 35% xylene, 5% to 15% cyclohexane, and 1% to 10% ethyl acetate. It is understood that this ratio of components in the organic solvent allows for high volatility, high fluidity, high dispersibility, and strong solubility in acrylic resins and epoxy resins, while also enabling cleaning of the area to be repaired 20.

[0072] In some embodiments, the thickness of the primer layer 30 is 0.5 to 5 μm. For example, the thickness of the primer layer 30 is 3 μm. When the thickness of the primer layer 30 is within the above value, the primer layer 30 can enhance the reliability of adhesion to the profile body 10 and the ink layer 40, while not being too thick to form a noticeable protrusion on the profile body 10, affecting the appearance.

[0073] In the related art, since the profile body 10 that has been anodized is baked at high temperature for a long time, the anodized film on the surface of the profile body 10 is prone to cracking; at the same time, in a high temperature environment, the profile body 10 that is oxidized as an anode is also prone to discoloration or fading. Here, high temperature refers to a temperature greater than or equal to 120°C, and long time refers to a baking time greater than or equal to 20 minutes. In order to avoid the above situation, the embodiment of the present application can select a low-temperature curable ink, which includes a light-curable ink or a low-temperature baking ink. The light-curable ink and the low-temperature baking ink can be metallic ink. The low-temperature baking ink is suitable for a baking temperature of less than or equal to 100°C. In some embodiments, please refer to Figure 6, which is a first process flow chart of the ink layer formation process provided in the embodiment of the present application. The formation process of the ink layer 40 includes: S200, printing a light-curable light-curable ink mixture; S300, light curing. In the step of providing the ink layer 40 on the base coat 30, the method for repairing the profile 1 includes: providing a light-curable ink mixture on the base coat 30, the light-curable ink mixture comprising a polyurethane acrylate resin prepolymer, a reactive diluent, and a photoinitiator; and irradiating the light-curable ink mixture with light to cure the light-curable ink mixture to form the ink layer 40. Under the action of light, the polyurethane acrylate resin prepolymer undergoes a polymerization reaction to form the ink layer 40 on the base coat 30. It is understood that the light-curable ink mixture is a light-curable ink mixture. The light irradiation may be ultraviolet (UV) light.

[0074] Among them, the active diluent is a monofunctional acrylate or a multifunctional acrylate; the active diluent can be one or more of isobornyl (meth)acrylate, isooctyl (meth)acrylate, dodecyl (meth)acrylate, isodecyl (meth)acrylate, caprolactone (meth)acrylate, hydroxyethyl (meth)acrylate, C16-C18 methacrylate, stearic acid methacrylate, 2-ethylhexyl methacrylate, hexanediol diacrylate, polyethylene glycol diacrylate, tripropylene glycol diacrylate, propoxylated trimethylolpropane triacrylate or propoxylated pentaerythritol tetraacrylate.

[0075] The light-curable ink mixture may be applied to the base coating 30 by uniformly printing the light-curable ink mixture on the surface of the base coating 30 in the area 20 to be repaired using a screen printing device or a pad printing device. The mesh size of the screen of the screen printing device may be 300 to 350. The printed area of ​​the light-curable ink mixture may be equal to or slightly larger than the area of ​​the area 20 to be repaired in the base coating 30. The thickness of the light-curable ink mixture applied to the base coating 30 may be 10 μm to 20 μm.

[0076] After the light-curable ink mixture is disposed on the base coating layer 30, the light-curable ink mixture may be left at room temperature for 5 to 8 minutes before entering a curing process to form the ink layer 40. It is understood that the light-curable ink mixture is left at room temperature for 5 to 8 minutes to allow the light-curable ink mixture to be fully leveled and stably disposed on the base coating layer 30.

[0077] The composition of the photocurable ink mixture is, by mass percentage, 40% to 50% polyurethane acrylate resin prepolymer, 10% to 20% reactive diluent, and 5% to 15% photoinitiator. The photoinitiator can be a ketone, such as one or more of benzophenone, p-phenylbenzophenone, halogenated acetophenone, and hydroxycyclohexylphenyl ketone; or one or more of benzoin and its ethers, such as benzoin methyl ether, benzoin ethyl ether, benzoin butyl ether, α-methylbenzoin, and α-phenylbenzoin.

[0078] Among them, the polyurethane-modified acrylate resin is a prepolymer that polymerizes to form a polyurethane acrylate resin after exposure to light. It is an important component that determines the performance of the ink layer 40. It is a basic component in the ink layer 40 and is the main film-forming substance. It plays an important role in the curing process of the coating material and the properties of the ink film layer after curing. The reactive diluent can reduce the viscosity of the prepolymer. At the same time, it can itself polymerize under the action of light and the initiator, becoming part of the ink layer 40. The photoinitiator can absorb ultraviolet light within a certain wavelength range and produce free radicals through decomposition reactions or cause secondary reactions to produce free radicals through light excitation. The free radicals generated during UV light exposure can trigger the polymerization reaction of the polyurethane acrylate resin prepolymer and the reactive diluent. After the light-curing ink mixture is applied to the base coat 30, it can be left to stand for 5 to 8 minutes to allow the light-curing ink mixture to fully level. Then, the light-curing ink mixture is cured by UV light using a light-emitting diode (LED) lamp. The UV light curing process parameters can be light energy of 12000 to 15000 mJ (millijoules), power of 1.2 to 1.5 kW (kilowatts), UV light curing wavelength of 365 nm (nanometers) or 395 nm, and illumination time of 5 s to 20 s (seconds).

[0079] The photocurable ink mixture further comprises one or more of talc, pigment, coupling agent, defoaming agent and leveling agent.

[0080] Talc is a filler that increases the strength of the ink layer 40. The pigment can be adjusted to match the color of the profile body 10 to the outer surface of the profile body 10. The coupling agent undergoes a self-crosslinking reaction with the prepolymer, enhancing the adhesion and tightness of the ink layer 40. The defoamer quickly removes bubbles during the stirring process of the photocurable ink mixture. The leveling agent ensures rapid leveling of the photocurable ink mixture after printing.

[0081] For example, when a photocurable ink mixture includes talc, pigment, coupling agent, defoamer, and leveling agent, the composition of the photocurable ink mixture is, by mass percentage, talc: 5% to 15%; pigment: 5% to 15%; coupling agent: 1% to 3%; defoamer: 0.5% to 1%; and leveling agent: 0.2% to 1%. It is understood that the photocurable ink mixture can achieve high strength, suitable color concentration, high adhesion and density, and easy processing by using this composition ratio.

[0082] The coupling agent may be one or more of a silane coupling agent containing vinyl and methacryloyl groups, an epoxy group, or an amine group. The defoamer may be a mixed solution of a foam-breaking polymer and a polysiloxane. The leveling agent may be one or more of a polyether-modified polydimethylsiloxane, a polyacrylate compound, an ink surfactant, or an oil-based leveling agent.

[0083] In some embodiments, please refer to Figure 7, which is a second process flow chart of the ink layer formation process provided in the embodiments of the present application. The formation process of the ink layer 40 includes: S400, printing a thermosetting ink mixture; S500, baking and curing. When the conditions for thermal baking and curing are met, a low-temperature baking type ink can be selected and set on the primer layer 30 and then cured to form the ink layer 40. In the step of setting the ink layer 40 on the primer layer 30, the method for repairing the profile 1 includes setting a thermosetting ink mixture on the primer layer 30; heating the thermosetting ink mixture so that the thermosetting ink mixture is cured to form the ink layer 40. The thermosetting ink mixture is a low-temperature baking type ink.

[0084] In the embodiment of the present application, the thermosetting ink mixture is prepared by thoroughly mixing 100 parts of SS-H501Y ink, 5 parts of a special curing agent, and 5 to 15 parts of a diluent.

[0085] After the thermosetting ink mixture is coated on the base coating 30, it can be left to stand for 5 to 8 minutes to allow the thermosetting ink mixture to fully level out, and then the thermosetting ink mixture is baked and cured in a drying tunnel or baking oven at a baking temperature of 80°C to 100°C and a baking time of 15 minutes to 20 minutes to complete the curing.

[0086] It can be seen that in the process of curing the thermosetting ink mixture, the baking temperature is less than 100°C and the baking time is less than 20 minutes. Therefore, it is possible to prevent the anodized film on the surface of the profile body 10 from cracking, discoloring or fading. In some embodiments, the thickness of the ink layer 40 is 5 to 20 μm. For example, the thickness of the ink layer 40 is 15 μm. When the thickness of the ink layer 40 is the above value, it can not only cover the whitening caused by cracks or damage on the oxide film of the profile body 10, but also prevent the ink layer 40 from forming obvious protrusions on the profile body 10, affecting the appearance.

[0087] In some embodiments, after confirming the repaired area 20 at the bend 11 of the profile body 10, the profile 1 repair method includes cleaning the repaired area 20 with ethanol or isopropyl alcohol to facilitate subsequent application of the primer 30 on the repaired area 20. The mass percentage of the ethanol is 75%.

[0088] Optionally, for cracked or exposed oxide films at the outer R corners of the frame bend, wipe the area 20 to be repaired with a solvent such as 75% alcohol or isopropyl alcohol, let it dry for 15 to 30 seconds until the alcohol or isopropyl alcohol evaporates, and then proceed to the next step. In some scenarios, please refer to Figure 8, which is a schematic diagram of the second process of the profile repair method provided in the embodiment of the present application.

[0089] Taking the aluminum alloy profile body 10 as an example, the specific steps for forming a finished product, such as a "door-shaped" frame, are: S101, aluminum extrusion, S102, mechanical surface treatment (brushing or sandblasting), S103, anodizing of the profile body 10, S104, punching, S105, bending, S106, welding, S107, surface cleaning, S108, surface primer process, S109, printing process (silk screen printing or pad printing), S110, curing process (low-temperature baking curing or light curing), S111, finished product. The above steps are explained below. Aluminum extrusion: an aluminum alloy ingot is used to extrude a profile body 10 having a middle frame cross-sectional shape through an extruder and an extrusion die, such as an aluminum extruded profile body 10, and then cut according to the total length of the three sides of the middle frame;

[0090] Mechanical surface treatment: brushing or sandblasting the aluminum extruded profile body 10 to form a brushed or sandblasted effect;

[0091] Anodizing the profile body 10: The profile body 10 is anodized to form a protective oxide film on the surface. If the profile body 10 needs to be colored, it can be dyed after oxidation and then sealed with the anodized film. If a silvery white color is required, the anodized film can be sealed after oxidation.

[0092] Punching and bending: Punching a V-shaped notch on the profile body 10, and then bending the V-notch 90 degrees to form a three-sided frame structure.

[0093] Welding: The bending seams are welded to fix the frame structure and enhance stability.

[0094] Surface Cleaning: For areas to be repaired (20) where the oxide film is cracked or exposed at the outer corners of the frame bend, wipe clean the area 20 with a solvent such as 75% alcohol or isopropyl alcohol. Allow to dry for 15 to 30 seconds before proceeding to the next step. Surface Primer: Use a flat-tipped primer pen or roller to evenly apply the coating material to the area 20 to be repaired. The primer 30 must completely cover the area 20 to be repaired. The thinner the coating, the better, while ensuring uniformity. The coating thickness is approximately 0.5 to 5 μm. This coating material is a transparent liquid and may include 25 to 50% isopropyl alcohol, 15 to 35% xylene, 5 to 15% cyclohexane, 1 to 10% ethyl acetate, 1 to 7% acrylic resin, 0.8 to 1% epoxy resin, and 0.3 to 1% other active agents. After evenly applying the coating material to the repaired area 20, the primer surface is dried using a hot air dryer at a drying temperature of 50°C to 80°C for 3 to 5 minutes to fully dry the surface and form a uniform film. Isopropyl alcohol, xylene, cyclohexane, and ethyl acetate are solvents with high volatility, high fluidity, and high dispersibility, which can clean the surface and dissolve the resin components in the coating material. Acrylic resin and epoxy resin have film-forming properties, forming a uniform and dense film layer on the surface, serving as the basic film-forming substances for the coating material. Active additives further enhance the film-forming properties and adhesion of acrylic resin and epoxy resin on the surface. The primer layer 30 primarily serves as a bridge, connecting the repaired area 20 on one hand and the ink layer 40 on the other.

[0095] The first printing process involves using a screen printer (300-350 mesh) to evenly print a photocurable ink mixture onto the surface of the primer layer 30 in the repaired area 20. The printed area is equal to or slightly larger than the primer layer 30, and the printed film thickness is 8 to 15 μm. The mixture is then left to stand at room temperature for 5 to 8 minutes before entering the photocurable ink mixture curing process. The photocurable ink mixture can be a UV-curable ink containing 40% to 50% polyurethane-modified acrylate resin, 10% to 20% multifunctional acrylate monomer, 5% to 15% hydroxycyclohexyl phenyl ketone, 5% to 15% talc, 5% to 15% pigment, 1% to 3% coupling agent, 0.5% to 1% defoaming agent, and 0.2% to 1% leveling agent. Polyurethane-modified acrylate resin is a polymerizable prepolymer, a key component in determining the performance of UV varnish coatings. It is a basic component of UV inks and a film-forming substance. Its performance plays an important role in the curing process and the properties of the cured ink film. Multifunctional active acrylate monomers are active diluents used to reduce the viscosity of the prepolymer. At the same time, the monomers themselves polymerize and become part of the cured film. Hydroxycyclohexyl phenyl ketone is a photoinitiator that triggers the polymerization reaction of the prepolymer and active monomers under UV light. Talc is a filler that increases the strength of the ink. Pigments can be formulated according to the color of the anodized coating to achieve the same color as the anode. Coupling agents undergo a self-crosslinking reaction with the prepolymer to provide film adhesion and tightness. Defoamers quickly defoam during the ink stirring process. Leveling agents help the printed ink layer to level quickly.

[0096] Second printing process: After the thermosetting ink mixture is coated on the base coating 30 , it can be left to stand for 5 to 8 minutes to allow the thermosetting ink mixture to fully level out.

[0097] The first curing process (corresponding to the first printing process): After printing is completed, let it stand for 5 to 8 minutes, and then the printed part is UV-cured under the light of a UV curing machine with an LED lamp. The light curing energy is 12,000 to 15,000 millijoules, the power is 1.2 to 1.5 kw, the UV light curing wavelength is 365 nm or 395 nm, and the illumination time is 5 to 20 seconds to complete the curing.

[0098] The second curing process (corresponding to the second printing process): the thermosetting ink mixture is cured by passing it through a drying tunnel or a baking oven at a temperature of 80-100°C and a baking time of 15-20 minutes.

[0099] This embodiment of the present application further provides a primer layer 30. This primer layer 30 can be used in the above-mentioned method for repairing the profile 1. This primer layer 30 can adhere to the profile body 10 and the ink layer 40. The primer layer 30 is composed of acrylic resin, epoxy resin, and an active agent.

[0100] A coating material is provided on the area to be repaired 20 to form a primer layer 30. The coating material includes acrylic resin, epoxy resin and an active auxiliary agent.

[0101] The embodiment of the present application further provides an ink layer 40. The ink layer 40 can be applied to the above-mentioned method for repairing the profile 1. The ink layer 40 can cover the white spots caused by cracks or damage on the oxide film of the profile body 10.

[0102] The acrylic resin and epoxy resin possess film-forming properties, forming a uniform, dense film layer on the repaired area 20. The active agent enhances the film-forming and adhesion properties of the acrylic resin and epoxy resin. The active agent may be an amphoteric surfactant, a cationic surfactant, or a nonionic surfactant, such as metal oxides, hydroxides, basic carbonates, fatty acids, amines, polyols, or amino alcohols. The active agent may be a single chemical substance or multiple chemical substances, such as sodium hydroxide or a mixture of sodium hydroxide and sodium carbonate.

[0103] The coating material further includes an organic solvent. The coating material is dried to volatilize the organic solvent, thereby forming a primer layer 30 on the area to be repaired 20 .

[0104] The coating material can be applied to the area to be repaired 20 by using a flat-head primer pen or a roller to evenly apply the coating material to the area to be repaired 20. The thickness of the coating material can be 0.5 μm to 5 μm.

[0105] The components of the coating material, calculated by mass percentage, include: organic solvent: 91% to 97.9%; acrylic resin: 1% to 7%; epoxy resin: 0.8% to 1%; and active agent: 0.3% to 1%.

[0106] The organic solvent needs to have volatility, fluidity, dispersibility and solubility. The organic solvent is used to dissolve acrylic resin and epoxy resin, and the boiling point of the organic solvent can be less than or equal to 80°C. The organic solvent can be one or more of isopropyl alcohol, xylene, cyclohexane and ethyl acetate. If the chemical type of the organic solvent is single, the functions that the organic solvent can achieve are relatively few. When the organic solvent contains multiple chemical substances, the functions of the organic solvent are diverse. It is understandable that when the organic solvent includes isopropyl alcohol, xylene, cyclohexane and ethyl acetate, the organic solvent has higher volatility, higher fluidity, higher dispersibility and better solubility for acrylic resin and epoxy resin.

[0107] The coating material is dried to volatilize the organic solvent, thereby forming a primer layer 30 on the area to be repaired 20. For example, after the coating material is evenly applied to the area to be repaired 20, the primer surface is dried for 3 to 5 minutes using hot air at a drying temperature of 50°C to 80°C to fully dry the surface and form a uniform film, thereby forming the primer layer 30. For another example, after the coating material is evenly applied to the area to be repaired 20, the solvent in the coating material evaporates at room temperature to form the primer layer 30.

[0108] The organic solvent comprises, by mass percentage, 25% to 50% isopropyl alcohol, 15% to 35% xylene, 5% to 15% cyclohexane, and 1% to 10% ethyl acetate. It is understood that the organic solvent, with this ratio of components, exhibits high volatility, high fluidity, high dispersibility, and strong solubility for acrylic resins and epoxy resins.

[0109] The present invention provides a method for repairing a profile 1 and a primer coating 30. The method comprises providing a profile body 10; identifying an area 20 to be repaired at a bend 11 of the profile body 10, and applying a primer coating 30 on the area 20 to be repaired; and applying an ink layer 40 on the primer coating 30 to cover the area 20 to be repaired. The primer coating 30 is capable of adhering to the profile body 10 and the ink layer 40. The ink layer 40 can cover and repair the area 20 to be repaired of the profile body 10, thereby repairing the area 20 to be repaired of the profile body 10 and improving the corrosion resistance of the profile body 10. The primer coating 30 grips the profile body 10 and the ink layer 40, improving the adhesion of the ink layer 40 to the profile body 10 and increasing reliability.

[0110] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0111] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0112] The coating materials, profiles, and repair methods thereof provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the present application. At the same time, for those skilled in the art, based on the concepts of the present application, there may be changes in the specific implementation methods and scope of application. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A coating material, which is used to adhere to a profile body and an ink layer, and the coating material comprises acrylic resin, epoxy resin and an active auxiliary agent.

2. The coating material according to claim 1, in, The invention also comprises an organic solvent, and the organic solvent is used to dissolve the acrylic resin, the epoxy resin and the active auxiliary agent.

3. The coating material according to claim 2, in, The organic solvent includes xylene.

4. The coating material according to claim 3, in, The organic solvent also includes isopropanol, cyclohexane and ethyl acetate; the components of the organic solvent include, by mass percentage: the isopropanol: 25% to 50%; the xylene: 15% to 35%; the cyclohexane: 5% to 15%; the ethyl acetate: 1% to 10%.

5. The coating material according to claim 2, in, The components of the coating material include, by mass percentage: the organic solvent: 91% to 97.9%; the acrylic resin: 1% to 7%; the epoxy resin: 0.8% to 1%; and the active auxiliary agent: 0.3% to 1%.

6. The coating material according to claim 1, in, The active auxiliary agent is a silane coupling agent.

7. A profile, wherein include: A profile body, wherein the profile body has a region to be repaired; A primer layer, the primer layer is disposed on the area to be repaired, the primer layer is formed by a coating material, and the coating material includes an acrylic resin, an epoxy resin, and an active auxiliary agent; An ink layer, wherein the ink layer is disposed on a side of the primer layer away from the profile body to cover the area to be repaired; Wherein, the primer layer is used to adhere the profile body and the ink layer.

8. The profile according to claim 7, in, The coating material further includes an organic solvent, and the organic solvent is used to dissolve the acrylic resin, the epoxy resin and the active auxiliary agent.

9. The profile according to claim 8, in, The organic solvent includes one or more of isopropanol, xylene, cyclohexane and ethyl acetate.

10. The profile according to claim 7, in, The material of the ink layer includes polyurethane acrylate resin and active diluent.

11. The profile according to claim 10, in, The reactive diluent is monofunctional acrylate or multifunctional acrylate.

12. The profile according to claim 7, in, The primer layer has a thickness of 0.5 to 5 μm.

13. The profile according to claim 7, in, The ink layer has a thickness of 5 to 20 μm.

14. A method for repairing a profile, wherein include: Providing a profile body; Confirming the area to be repaired of the profile body; Disposing a coating material on the area to be repaired to form a primer layer, wherein the coating material comprises an acrylic resin, an epoxy resin and an active auxiliary agent; Providing an ink layer on the primer layer to cover the area to be repaired; Wherein, the primer layer is used to adhere the profile body and the ink layer.

15. The method for repairing a profile according to claim 14, in, The step of arranging the coating material on the profile body to form a primer layer comprises: Applying a coating material on the area to be repaired, wherein the coating material further comprises an organic solvent; The coating material is dried to volatilize the organic solvent, so as to form the primer layer on the area to be repaired.

16. The method for repairing a profile according to claim 14, in, Providing an ink layer on the primer layer comprises: Disposing a photocurable ink mixture on the base coating, wherein the photocurable ink mixture comprises a polyurethane acrylate resin prepolymer, a reactive diluent and a photoinitiator; The photocurable ink mixture is irradiated with light to cure the photocurable ink mixture to form an ink layer.

17. The method for repairing a profile according to claim 16, in, The step of disposing the light-curable ink mixture on the base coating layer comprises: The photocurable ink mixture is evenly printed on the surface of the primer layer in the area to be repaired by using a silk screen printing device or a pad printing device.

18. The method for repairing a profile according to claim 16, in, The components of the photocurable ink mixture are as follows by mass percentage: 40% to 50% of the polyurethane acrylate resin prepolymer; 10% to 20% of the active diluent; and 5% to 15% of the photoinitiator.

19. The method for repairing a profile according to claim 14, in, The ink layer is provided on the primer layer, comprising: disposing a thermosetting ink mixture on the base coating; The thermosetting ink mixture is heated to solidify the thermosetting ink mixture to form an ink layer.

20. The method for repairing a profile according to claim 14, in, After confirming the area to be repaired of the profile, the method further includes cleaning the area to be repaired using ethanol or isopropanol.

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