Aluminum profile wood grain printing method and aluminum profile

Abstract

The application relates to the technical field of aluminum profile surface treatment, and discloses an aluminum profile wood grain printing method and aluminum profile, which is a film-coated aluminum profile, and comprises the following steps: performing corona treatment on the film on the surface of the film-coated aluminum profile; and performing additional wood grain pattern treatment on the film. The film is subjected to the corona treatment in advance, the polarity of the film surface is destroyed, the adhesion of ink on the film is enhanced, the additional wood grain pattern can be firmly attached to the film, the original wax smooth touch of the film-coated aluminum profile surface is retained, and the firm attachment of the wood grain pattern is realized.

Description

Technical Field

[0001] This application relates to the field of aluminum profile surface treatment technology, and mainly to a method for wood grain printing on aluminum profiles and aluminum profiles. Background Technology

[0002] Aluminum profiles are widely used in people's daily lives. To meet aesthetic requirements, most architectural aluminum profiles are adorned with wood grain patterns. Currently, the main process for adding wood grain patterns to aluminum profiles is wood grain transfer printing. Common surface treatment methods for aluminum profiles include anodizing, electrophoretic coating, powder coating, fluorocarbon coating, and ceramic coating. The wood grain transfer printing process, based on powder coating, utilizes the principle of high-temperature sublimation heat penetration. Through heating and pressurization, the wood grain pattern on transfer paper or film is rapidly transferred and penetrated onto the already coated profile, resulting in a clear, three-dimensional texture that better reflects the natural feel of wood grain.

[0003] With the development of technology, a new surface treatment process has recently emerged, which involves applying a film to the surface of aluminum profiles to give them a waxy, smooth feel, such as... Figure 1 As shown, the film used is generally PET film, PVC film, etc., mainly PET film. The customer requested an additional wood grain pattern on the surface of the aluminum profile to be filmed. However, because this type of film has a waxy, smooth feel and strong surface polarity, if conventional wood grain transfer is performed directly on the film-coated aluminum profile, the transferred pattern will have low adhesion and will be easily scratched off. Figure 2 As shown. Using solvents to clean the film surface can enhance the adhesion of the transferred pattern, but the solvents will cause the film to lose its waxy feel, negating the purpose of applying the film. Since applying film to the surface of aluminum profiles is a new surface treatment process, there are currently no commercially available processes for adding wood grain patterns to such aluminum profiles. Therefore, existing technology still needs improvement and development. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a wood grain printing method for aluminum profiles and aluminum profiles, which aims to solve the problem that the existing processing technology of adding wood grain patterns to the surface of aluminum profiles is not suitable for aluminum profiles with film.

[0005] The technical solution of this application is as follows:

[0006] A method for printing wood grain patterns on aluminum profiles, wherein the aluminum profiles are laminated aluminum profiles, comprising the following steps:

[0007] The film on the surface of the aluminum profile to which the film is applied is subjected to corona treatment;

[0008] An additional wood grain pattern is applied to the film.

[0009] By pre-treating the film with corona, the polarity of the film surface is disrupted, which enhances the adhesion of ink to the film. This allows the added wood grain pattern to adhere firmly to the film, preserving the original waxy smooth feel of the aluminum profile surface while achieving a firm adhesion of the wood grain pattern.

[0010] The method for printing wood grain on aluminum profiles, wherein during the corona treatment process, the electrode gap is set to 1-2mm, the treatment voltage is 5000-6000V, the treatment power is 10-15kW, and the treatment speed is 25-30m / min.

[0011] Using the above corona treatment parameters enhances the adhesion of subsequent wood grain patterns without significantly affecting the original waxy smoothness of the film surface.

[0012] The method for printing wood grain on aluminum profiles, wherein the additional wood grain pattern processing is specifically performed by screen printing.

[0013] The aforementioned method for printing wood grain patterns on aluminum profiles, wherein the process of adding wood grain patterns using screen printing includes the following steps:

[0014] The wood pulp layer is printed onto the film using screen printing.

[0015] A layer of wood splinters is printed onto the film using screen printing.

[0016] The aluminum profile with the film applied is dried at 60-80℃ for 0.5-2 hours.

[0017] The method for printing wood grain on aluminum profiles, wherein the wood core layer is printed using 1-3 screen printing plates, and the wood splinter layer is printed using 1-10 screen printing plates.

[0018] The wood grain printing method for aluminum profiles, wherein the wood splinter layer is printed using 3-10 screen printing plates.

[0019] The method for printing wood grain on aluminum profiles, wherein the wood splinter layer and the wood core layer are printed using screen printing inks with different gloss levels or different colors.

[0020] The method for printing wood grain on aluminum profiles, after printing the wood splinter layer on the film by screen printing, further includes the following steps:

[0021] A transparent or matte ink layer is printed on the film using screen printing.

[0022] The wood grain printing method for aluminum profiles, wherein the film is a PET film.

[0023] An aluminum profile, wherein the aluminum profile is a film-coated aluminum profile, and a wood grain pattern is attached to the aluminum profile, the wood grain pattern being printed using the aluminum profile wood grain printing method described above.

[0024] Beneficial effects: The wood grain printing method for aluminum profiles provided in this application offers a new solution for adding wood grain patterns to aluminum profiles with film. By pre-treating the film with corona discharge to break the polarity of the film surface, the adhesion of ink to the film can be enhanced. Then, the wood grain pattern is added to the film by screen printing. The added wood grain pattern can be firmly attached to the film, which not only preserves the original waxy smooth feel of the aluminum profile surface with film, but also achieves firm adhesion of the wood grain pattern. Attached Figure Description

[0025] Figure 1 A schematic diagram illustrating the effect of applying a film to an aluminum profile.

[0026] Figure 2 This is a schematic diagram illustrating the effect of transferring patterns onto a laminated aluminum profile using existing wood grain transfer paper.

[0027] Figure 3 This is a schematic diagram illustrating the effect of printing a wood grain pattern on a laminated aluminum profile using the wood grain printing method provided in this application in Embodiment 1 of this application.

[0028] Figure 4 This is a schematic diagram illustrating the effect of printing a wood grain pattern on a laminated aluminum profile using the wood grain printing method provided in this application in Embodiment 2 of this application. Detailed Implementation

[0029] This application provides a method for wood grain printing on aluminum profiles and the aluminum profiles themselves. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0030] The customer requested an additional wood grain pattern on the surface of the aluminum profiles to be coated with film. However, due to the waxy, smooth feel and strong surface polarity of this film, direct application of conventional wood grain transfer techniques to the coated aluminum profiles results in poor adhesion of the transferred pattern, making it easily scratched off. Figure 2As shown. Since existing wood grain transfer processes are not suitable for aluminum profiles with laminated films, there is currently no process for adding wood grain patterns to such profiles. Therefore, the applicant is researching a process for adding wood grain patterns to such aluminum profiles, seeking one that can retain the smooth, waxy feel of the aluminum profile surface while ensuring the wood grain pattern adheres firmly to the profile. The laminated film is generally made of PET film or PVC film, primarily PET film; therefore, the applicant's research mainly focuses on aluminum profiles with PET film.

[0031] This application provides a method for printing wood grain on aluminum profiles, including the following steps:

[0032] The film on the surface of the aluminum profile to be coated is subjected to corona treatment;

[0033] Add a wood grain pattern to the film on the surface of the aluminum profile.

[0034] By pre-treating the film with corona, the polarity of the film surface is disrupted, which enhances the adhesion of ink to the film. This allows the added wood grain pattern to adhere firmly to the film, preserving the original waxy smooth feel of the aluminum profile surface while ensuring the firm adhesion of the wood grain pattern.

[0035] Furthermore, during the corona treatment process, the electrode gap is set to 1-2 mm, the treatment voltage is 5000-6000V, the treatment power is 10-15kW, and the treatment speed is 25-30m / min.

[0036] Since the aluminum profile for the film was provided by the customer, when adjusting the corona treatment parameters, in addition to considering how to enhance the adhesion of the subsequent wood grain pattern, it was also necessary to consider whether the corona treatment would change the original waxy smooth feel of the film surface. Generally, corona treatment of PET film uses higher processing voltage and higher processing power to enhance the treatment effect. However, after multiple experiments, it was found that using excessively high processing voltage and power on the aluminum profile for this film would cause the film to lose its original waxy smooth feel or become less smooth. After several adjustments, the above-mentioned corona treatment parameters were used, which enhanced the adhesion of the subsequent wood grain pattern without significantly affecting the original waxy smooth feel of the film surface.

[0037] Furthermore, in this application, the additional wood grain pattern processing is specifically carried out through screen printing. Although corona treatment can increase the adhesion of the wood grain pattern to the film, the durability of the wood grain pattern transferred by the wood grain transfer process still does not meet the requirements. Therefore, the applicant changed its approach and adopted screen printing for additional wood grain pattern processing. It was found that the wood grain pattern added by screen printing has better wear resistance and weather resistance, realistic colors, clear layers, and the operation is less difficult and simpler than the original wood grain transfer process.

[0038] Wood grain patterns can be divided into the wood core layer and the wood spike layer. The wood core layer refers to the bottom layer of the wood grain, which is equivalent to the stem of the wood; the wood spike layer refers to the surface layer of the wood grain, which is equivalent to the raised stripes or granules on the surface of the stem.

[0039] Specifically, the process of adding wood grain patterns using screen printing may include the following steps:

[0040] A layer of wood pulp is printed onto the film on the surface of the aluminum profile using screen printing.

[0041] A layer of wood splinters is printed onto the film on the surface of the aluminum profile using screen printing.

[0042] Dry the aluminum profiles with the film applied at 60-80℃ for 0.5-2 hours.

[0043] Furthermore, the wood core layer can be printed using 1-3 screen printing plates, while the wood splinter layer can be printed using 1-10 screen printing plates. Depending on the wood grain pattern, the wood core layer can be printed using 1-3 screen printing plates, primarily to mask the original color of the aluminum profile being coated, resulting in a natural wood core color. Similarly, the wood splinter layer can be printed using 1-10 screen printing plates, with the order of each plate and the position and size of the wood splinters on each plate determined according to the wood grain pattern.

[0044] Preferably, the wood splinter layer can be printed using 3-10 screen printing plates. Printing the wood splinter layer using multiple screen printing plates, and stacking multiple layers of screen printing ink, not only creates a three-dimensional wood grain visual effect but also provides a raised, three-dimensional wood grain feel, making the resulting wood grain pattern realistic. Regarding the screen printing ink used, this application does not impose any special restrictions; commercially available screen printing ink that is not thermal sublimation transfer ink can be used. In the embodiments of this application, taking aluminum profiles coated with PET film as an example, PET screen printing ink suitable for PET is used.

[0045] Furthermore, the splinter layer and the wood core layer are printed with screen printing inks of different gloss levels or colors. This creates a better three-dimensional wood grain effect on the coated aluminum profile, presenting a natural and realistic wood grain appearance.

[0046] Furthermore, after printing the wood splinter layer onto the film on the surface of the aluminum profile using screen printing, the following steps may also be included:

[0047] A transparent or matte ink layer is printed on the film on the surface of the aluminum profile using screen printing.

[0048] This transparent or matte ink layer covers the surface of the splinter and wood layers, protecting the protruding splinter layer from peeling off and extending its lifespan. At the same time, it also makes the splinter and wood layers appear as a single unit, more closely resembling a natural and realistic wood grain effect.

[0049] This application also provides an aluminum profile, which is a film-coated aluminum profile with a wood grain pattern attached to it. The wood grain pattern is printed using the aforementioned aluminum profile wood grain printing method.

[0050] The present application will be further described below through specific embodiments.

[0051] Example 1

[0052] The inks used in this example are all Zhongyi PET screen printing inks.

[0053] This application provides a method for printing wood grain on aluminum profiles, including the following steps:

[0054] The film on the surface of the aluminum profile is subjected to corona treatment. The electrode gap is set to 2mm, the treatment voltage is 5500V, the treatment power is 12kW, and the treatment speed is 30m / min.

[0055] The wood pulp layer is printed on the film on the surface of the aluminum profile using screen printing. Yellow ink is selected as the wood pulp layer ink, and two screen printing plates are used in this process.

[0056] A wood splinter layer is printed on the film on the surface of the aluminum profile using screen printing. Brown ink is selected as the ink for the wood core layer. Six screen printing plates are used in this process.

[0057] A transparent ink layer is printed on the film on the surface of the aluminum profile using screen printing, with one screen printing plate used in this process;

[0058] Dry the aluminum profile with the film applied at 70℃ for 1 hour.

[0059] After drying, aluminum profiles with an added wood grain film, such as Figure 3 As shown, the wood grain on the surface is clear and complete, and still has a waxy smooth feel; the wood grain pattern adheres well to the film and cannot be scraped off with a fingernail.

[0060] Example 2

[0061] The inks used in this example are all Zhongyi PET screen printing inks.

[0062] This application provides a method for printing wood grain on aluminum profiles, including the following steps:

[0063] The film on the surface of the aluminum profile is subjected to corona treatment. The electrode gap is set to 2mm, the treatment voltage is 5500V, the treatment power is 12kW, and the treatment speed is 30m / min.

[0064] The wood pulp layer is printed on the film on the surface of the aluminum profile using screen printing. Black ink is selected as the ink for the wood pulp layer. Two screen printing plates are used in this process.

[0065] A wood splinter layer is printed on the film on the surface of the aluminum profile using screen printing. Light yellow ink is selected as the ink for the wood core layer. Four screen printing plates are used in this process.

[0066] A transparent ink layer is printed on the film on the surface of the aluminum profile using screen printing, with one screen printing plate used in this process;

[0067] Dry the aluminum profile with the film applied at 70℃ for 1 hour.

[0068] After drying, aluminum profiles with an added wood grain film, such as Figure 4 As shown, the wood grain on the surface is clear and complete, and still has a waxy smooth feel; the wood grain pattern adheres well to the film and cannot be scraped off with a fingernail.

[0069] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A method for printing wood grain on aluminum profiles, wherein the aluminum profile is a film-coated aluminum profile, characterized in that, Includes the following steps: The film on the surface of the aluminum profile to which the film is applied is subjected to corona treatment; Add a wood grain pattern to the film; The film is a PET film; During the corona treatment, the electrode gap is set to 1-2 mm, the treatment voltage is 5000-6000V, the treatment power is 10-15kW, and the treatment speed is 25-30m / min. The additional wood grain pattern processing is specifically carried out by screen printing. The process of adding wood grain patterns using screen printing includes the following steps: The wood pulp layer is printed onto the film using screen printing. A layer of wood splinters is printed onto the film using screen printing. The aluminum profile with the film applied is dried at 60-80℃ for 0.5-2 hours.

2. The method for printing wood grain on aluminum profiles according to claim 1, characterized in that, The wood core layer is printed using 1-3 screen printing plates, and the wood splinter layer is printed using 1-10 screen printing plates.

3. The method for printing wood grain on aluminum profiles according to claim 2, characterized in that, The wood splinter layer is formed by printing using 3-10 screen printing plates.

4. The method for printing wood grain on aluminum profiles according to claim 1, characterized in that, The splinter layer and the wood core layer are printed using screen printing inks with different gloss levels or colors.

5. The method for printing wood grain on aluminum profiles according to claim 1, characterized in that, After printing the wood splinter layer onto the film using screen printing, the following steps are also included: A transparent or matte ink layer is printed on the film using screen printing.

6. An aluminum profile, wherein the aluminum profile is a film-coated aluminum profile, characterized in that, The aluminum profile is provided with a wood grain pattern, which is printed using the wood grain printing method for aluminum profiles as described in any one of claims 1 to 5.

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