Repair method for exterior decorative components and repair transfer paper

Abstract

To provide a repair method for an exterior decorative member and transfer paper capable of not only repairing a design surface, but also providing a clear paint layer excellent in workability during the repair and excellent durability after the repair, onto the surface of the repaired part in the repair of the exterior decorative member.SOLUTION: A repair method for an exterior decorative member of the invention is a method for repairing deterioration or defects in design of an exterior decorative member, which comprises the steps of: replenishing paint or pattern ink into a portion to be repaired; and providing a clear paint layer on a surface of the portion to be repaired. A resin contained in the paint or the pattern ink for the portion to be repaired contains a component constituted of a polymer that has a cross-linking bond.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for repairing an exterior decorative member and a transfer paper for repair. In particular, it relates to a method for repairing an exterior decorative material and a transfer paper for repair, wherein the material serving as the base material of the member is a metal such as aluminum or steel plate, or a non-combustible material, and has a pattern layer or a colored layer on the surface.

Background Art

[0002] Exterior decorative members as building materials are widely used, including for housing. For example, with metals or non-combustible materials as the base materials, their designs vary, including single colors by painting or coating, or expressions such as spraying by painting techniques, and those provided with desired patterns using printing techniques.

[0003] The application of printing techniques to building materials, particularly interior and exterior materials, has been widely carried out since the latter half of the 20th century. In modern building materials for houses or stores, most of the floors, ceilings, wall surfaces, fittings, furniture, etc. are those with designs applied to their surfaces using printing techniques, rather than those using natural materials as they are or pasted on the surface.

[0004] When using printing techniques, it is possible to provide a pattern by printing on a base material such as a plastic film and then attach it to a metal member, for example. Also, a method of transferring a pattern printed on paper or a plastic film to the surface of a metal member has been put into practical use.

[0005] For example, it can be selected and used from known printing methods such as gravure printing, offset printing, gravure offset printing, flexographic printing, silk screen printing, inkjet printing, etc. Among them, the gravure printing method has advantages in productivity, printing suitability for plastic films, and high definition of patterns, and is preferably used.

[0006] On the other hand, building materials and similar products are durable consumer goods, and are generally required to have a certain level of durability, scratch resistance, and weather resistance. However, it is not uncommon for the patterned layer to be damaged, deteriorate, whiten, or disappear due to unexpected environmental conditions or handling.

[0007] When such a phenomenon occurs, replacing the entire decorative component is an option, but this would incur additional costs, and sometimes replacement components may not be readily available. Therefore, repair is a practical and necessary solution.

[0008] However, there are challenges in repair as well. For example, when actually performing repairs, the missing area may be repaired by applying paint, and in this case, it is common to use touch-up pens. Alternatively, if there is a pattern layer, the repair may involve creating a similar or identical pattern over the existing pattern.

[0009] Furthermore, as mentioned above, exterior decorative components require a certain level of durability, scratch resistance, and weather resistance, so it is common practice to apply a clear coating as a surface protective layer.

[0010] In this process, the clear coating used as a surface protective layer may affect the initially repaired painted area, or the already formed design may be affected by swelling due to the solvent, or even disappear.

[0011] Patent Document 1 proposes a non-combustible decorative steel sheet, but while its non-combustibility as a decorative steel sheet is considered, it does not mention a repair method.

[0012] Furthermore, Patent Document 2 proposes a decorative material made using an ABS resin sheet having a patterned layer, but even in this case, no consideration was given to repair methods. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] Patent No. 5630161 [Patent Document 2] Japanese Patent Publication No. 2008-110532 [Overview of the project] [Problems that the invention aims to solve]

[0014] The present invention has been made in view of the above circumstances, and aims to provide a method for repairing exterior decorative members and a repair transfer paper that, in addition to repairing the design surface of exterior decorative members, provides a clear paint layer on the surface of the repaired portion, resulting in excellent workability during repair and excellent durability after repair. [Means for solving the problem]

[0015] As a means to solve the above problems, the invention described in claim 1 is, A method for repairing deterioration or defects in the design of exterior decorative components, The process includes filling the repaired area with paint or pattern ink, and then applying a clear paint layer to the surface of the repaired area. This is a method for repairing exterior decorative components, characterized in that the paint or pattern ink used for the repaired area contains a resin made of polymers, and these polymers have cross-linked bonds.

[0016] Furthermore, the invention described in claim 2 is, The aforementioned polymer is a resin having crosslinking bonds, The method for repairing an exterior decorative component according to claim 1, characterized in that the polyurethane resin is a polyol-curable type made of one or more of the following: acrylic polyol, polyester polyol, polyether polyol, epoxy polyol, polyolefin-based polyol, and fluorine-containing polyol.

[0017] Furthermore, the invention described in claim 3 is, The aforementioned polymer is a resin having crosslinking bonds, The method for repairing an exterior decorative member according to claim 1, characterized by comprising one or more of urethane acrylate, epoxy acrylate, and polyester acrylate.

[0018] Further, the invention according to claim 4 The method for repairing an exterior decorative member according to claim 3, characterized in that the polymer structures of the urethane acrylate, the epoxy acrylate, and the polyester acrylate are formed by ultraviolet irradiation or electron beam irradiation.

[0019] Further, the invention according to claim 5 In the method of repairing the repaired portion by filling a paint or a pattern ink, the filling is performed by transferring a paint or a pattern ink layer, which is a method for repairing an exterior decorative member according to any one of claims 1 to 4.

[0020] Further, the invention according to claim 6 The step of providing a clear paint layer on the surface of the repaired portion is composed of a step of providing a sealer layer and a step of providing a clear layer by spray coating on the surface, which is a method for repairing an exterior decorative member according to any one of claims 1 to 5.

[0021] Further, the invention according to claim 7 A transfer paper for performing the repair method according to claim 5 or claim 6, The transfer paper is composed of a release paper having paper as a base material, an adhesive layer, a paint or a pattern ink layer, and a plastic film layer. After peeling off the release paper, the paint or the pattern ink layer can be transferred to the repaired portion through the adhesive layer, and further the plastic film layer can be peeled off. The paint or the pattern ink layer is a transfer paper for repairing an exterior decorative member, characterized in that the polymer is composed of a resin having a crosslinked bond.

Advantages of the Invention

[0022] According to the present invention, in repairing exterior decorative members, in addition to repairing the design surface, a clear coating layer is provided on the surface of the repaired portion, making it possible to provide a repair method for exterior decorative members and a repair transfer paper that offers excellent workability during repair and excellent durability after repair.

[0023] In other words, according to the repair method shown in the present invention, the resin contained in the paint or ink of the repaired part contains a component made of a polymer, and the polymer structure is composed of a resin with cross-linking bonds. As a result, even when a clear paint layer is applied to the surface of the repaired part, it is less susceptible to the effects of solvents, etc., and it is possible to prevent the repaired part from dissolving, swelling, or disappearing.

[0024] Furthermore, by applying a clear paint layer to the outermost surface of the repaired area, it is possible to provide a certain level of durability, scratch resistance, and weather resistance as an exterior decorative component.

[0025] Furthermore, according to the invention described in claim 2 in particular, being a polymer is effective in preventing the paint or ink on the repaired area from dissolving, swelling, or disappearing due to the influence of the clear paint layer applied to the repaired area.

[0026] Furthermore, according to the invention described in claim 3 in particular, because the polymer is a resin having cross-linked bonds, when a clear paint layer is applied to the repaired area, it is possible to prevent the paint or ink on the repaired area from dissolving, swelling, disappearing, etc., due to the influence of the clear paint layer.

[0027] Furthermore, according to the invention described in claim 4 in particular, the polymer structure of the urethane acrylate, epoxy acrylate, and polyester acrylate is obtained by ultraviolet irradiation or electron beam irradiation, resulting in excellent low pollution and energy saving properties, as well as superior efficiency during polymerization and solidification. In addition, it is effective in preventing the paint or ink on the repaired area from dissolving, swelling, or disappearing.

[0028] Furthermore, according to the invention described in claim 5 in particular, in a method of repairing a damaged area by filling it with paint or patterned ink, this filling is performed by transferring a layer of paint or patterned ink. Compared to the so-called wet method, where paint or ink is applied to the area to be repaired using a brush or the like, this method is dry, offering superior workability and the advantage of being a relatively simple repair method that does not require skill or special techniques.

[0029] Furthermore, when the pattern ink layer is created using a printing method, it is possible to make the design of the surface of the decorative material before repair and the paint or pattern ink layer transferred and used for repair the same or similar pattern or similar color tone, thereby making the repair marks less noticeable.

[0030] Furthermore, according to the invention described in claim 6 in particular, the step of providing a clear paint layer on the surface of the repaired portion is comprised of a step of providing a sealer layer and a step of providing a clear layer on the surface by spray painting. As a result, the clear paint layer can obtain stronger adhesion due to the sealer layer, making it a more effective method for repairing exterior decorative members to protect the surface of the repaired portion.

[0031] Furthermore, according to the invention described in claim 7 in particular, the repair transfer paper according to the present invention comprises a release liner with a paper base, an adhesive layer, a paint or pattern ink layer, and a plastic film layer, enabling repair by transfer.

[0032] Furthermore, the paint or pattern ink layer is composed of polymers with cross-linked resins, which makes it less susceptible to the effects of solvents when a clear paint layer is applied to the surface of the repaired area, thus preventing dissolution, swelling, and disappearance of the repaired area, thus making it possible to create a repair transfer paper.

[0033] Furthermore, repairs using transfer paper are more efficient and require no special skills compared to the so-called wet method, which involves filling the repair area with paint or ink using a brush.

[0034] Furthermore, according to the configuration of the transfer paper of the invention described in claim 7, since the base material is a plastic film, when the paint or pattern ink layer is formed using a printing method, it is possible to create a more detailed and precise pattern or design.

[0035] Therefore, it is possible to make the design of the surface of the decorative material before repair and the paint or pattern ink layer transferred and used for repair the same or similar pattern or color tone, thereby making the repair marks less noticeable.

[0036] Thus, according to the present invention, it is possible to provide a method for repairing exterior decorative members and a transfer paper for repair. [Brief explanation of the drawing]

[0037] [Figure 1] Figure 1 is a schematic partial cross-sectional view illustrating the state of an exterior decorative member before repair, for the purpose of explaining one embodiment of the repair method for exterior decorative members according to the present invention. [Figure 2] Figure 2 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of filling the repaired portion with paint or pattern ink. [Figure 3] Figure 3 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of providing a sealer layer to the surface of the repaired portion. [Figure 4]Figure 4 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of applying a clear layer to the outermost surface by spray painting. [Figure 5] Figure 5 is a schematic partial cross-sectional diagram illustrating one embodiment of the configuration of a transfer paper in a method for repairing exterior decorative members according to the present invention, in which the repair is performed by a transfer method. It is also a schematic partial cross-sectional diagram illustrating the configuration of the transfer paper in Example 1 and Comparative Example 1. [Figure 6] Figure 6 is a schematic partial cross-sectional view illustrating one embodiment of a repair method for exterior decorative members according to the present invention, specifically a method for filling the repair area with paint or pattern ink by transfer. [Figure 7] Figure 7 is a schematic partial cross-sectional view illustrating the state after transfer in a method for repairing exterior decorative members according to the present invention, specifically a method for filling the repair area with paint or pattern ink by transfer. [Figure 8] Figure 8 is a schematic partial cross-sectional view illustrating one embodiment of a repair method for exterior decorative members according to the present invention, specifically the step of providing a sealer layer on the surface of the repaired portion, as part of a transfer-based repair method. [Figure 9] Figure 9 is a schematic partial cross-sectional view illustrating one embodiment of a repair method for exterior decorative members according to the present invention, specifically the step of applying a clear layer to the outermost surface by spray painting. [Modes for carrying out the invention]

[0038] The present invention will be described in more detail below with reference to Figures 1 to 9. However, the present invention is not limited to the examples shown herein. The present invention is limited by the claims.

[0039] Figure 1 is a schematic partial cross-sectional view illustrating the state of an exterior decorative member before repair, for the purpose of explaining one embodiment of the repair method for exterior decorative members according to the present invention.

[0040] The present invention relates to a repair method and repair transfer paper for repairing deterioration or defects in the design of an exterior decorative component (100). The repair method comprises the steps of filling the area to be repaired (20) with paint or pattern ink, and then applying a clear paint layer to the surface of the repaired area.

[0041] The base material (1) of the exterior decorative component (100) is not particularly limited, as long as its suitability as an exterior material is taken into consideration. For example, metals such as aluminum and iron, or non-combustible materials can be used, and other materials can be selected as the base material as long as they are suitable as an exterior material.

[0042] In the example of the exterior decorative member (100) shown in Figure 1, the member is composed of a base material (1), an adhesive layer (2), a plastic film layer (11), and a pattern layer (12) provided on its surface. The plastic film layer (11) having the pattern layer (12) is a decorative film (10), and the pattern layer (12) may be a single-color colored layer without a pattern.

[0043] In the example shown in Figure 1, the area to be repaired (20) is a depression, and the pattern layer (12) is partially missing. Other types of disappearance may occur due to external force applied to the exterior decorative material (100), such as being scraped away, or due to deterioration over time. In addition to disappearance, fading or whitening may also result in the area to be repaired (20).

[0044] The method for repairing an exterior decorative component (100) according to the present invention includes the steps of filling the part to be repaired (20) with paint or pattern ink, and then applying a clear paint layer to the surface of the repaired part.

[0045] Furthermore, in the repair method for exterior decorative member (100) and the repair transfer paper according to the present invention, the resin contained in the paint or pattern ink of the repaired portion contains a component made of a polymer, and the polymer is characterized by having cross-linked bonds.

[0046] In addition, when carrying out repairs, if necessary, surface treatment such as polishing and cleaning of the surface of the part to be repaired (20) may be performed prior to the repair. This will be explained later in the description of the repair method by transfer, using Figure 6.

[0047] Figure 2 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of filling the repaired portion with paint or pattern ink.

[0048] For example, to repair a dent in the part to be repaired (20), a method of restoring color or pattern using, for example, a touch-up pen is known. In the present invention, as a method of restoring color or pattern, for example, as shown in Figure 2, a method of filling in liquid paint or pattern ink (21) using a brush (22) can be used.

[0049] The present invention is characterized in that the paint or pattern ink (21) used for filling contains a component made of polymers, and the polymers have cross-linked bonds.

[0050] For example, the polymer having crosslinked bonds can be a polyol-curable polyurethane resin composed of one or more of the following: acrylic polyol, polyester polyol, polyether polyol, epoxy polyol, polyolefin-based polyol, and fluorine-containing polyol.

[0051] Alternatively, the polymer resin having cross-linked bonds may consist of one or more of urethane acrylate, epoxy acrylate, and polyester acrylate.

[0052] In other words, because it is a polymer, it is effective in preventing the paint or ink on the repaired area from dissolving, swelling, or disappearing due to the influence of the clear paint layer applied to the repaired area.

[0053] Furthermore, because the polymer is a resin with cross-linking bonds, when a clear coating layer is applied to the repaired area, it is possible to prevent the paint or ink on the repaired area from dissolving, swelling, or disappearing due to the influence of the clear coating layer.

[0054] Furthermore, these methods are also effective in improving the resistance of the exterior components to changes and deterioration over time after repair, such as preventing or mitigating changes like cracks, yellowing, chalking, and peeling.

[0055] Furthermore, the polymeric structures of these urethane acrylates, epoxy acrylates, and polyester acrylates can be determined by ultraviolet irradiation or electron beam irradiation.

[0056] The formation of polymer structures by ultraviolet irradiation or electron beam irradiation involves polymerizing a liquid material through a polymerization reaction, thereby solidifying it. Therefore, it offers excellent low pollution, energy efficiency, and high efficiency during solidification. In addition, it is effective in preventing the dissolution, swelling, or disappearance of paint or ink in the repaired area, and in preventing or mitigating the aforementioned deterioration over time.

[0057] Figure 3 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of providing a sealer layer to the surface of the repaired portion. In the present invention, the step of providing a clear paint layer on the surface of the repaired portion can consist of a step of providing a sealer layer (30) and a step of providing a clear layer thereon. The method for providing this clear layer can be, for example, painting by spray.

[0058] In the example shown in Figure 3, the process involves filling the area to be repaired (20) with paint or pattern ink (21), and then applying a sealer layer (30) to the surface of the repaired area.

[0059] In the example shown in Figure 3, the sealer layer (30) is formed by applying the sealer (32) to the surface of the replenished paint or pattern ink (21) using a brush (31) and allowing it to dry to form a layer.

[0060] This sealer layer (30), also known as a primer, is intended to improve the adhesion between the paint or pattern ink (21) applied to the repaired area and the clear layer applied to the surface of the repaired area.

[0061] There are no particular limitations on the type of sealer layer (30). Sealers are broadly divided into water-based and solvent-based sealers, but considering that they contribute to improving the adhesion between the paint or pattern ink (21) applied to the repaired area and the clear layer applied to the surface of the repaired area, it is possible to select one according to the type of clear layer. Generally, if the clear layer is water-based, a water-based sealer can be selected, and if the clear layer is solvent-based, a solvent-based sealer can be selected.

[0062] Figure 4 is a schematic partial cross-sectional view illustrating one embodiment of the repair method for exterior decorative members according to the present invention, specifically the step of applying a clear coat to the outermost surface by spray painting. However, a portion of the spray can (41) is shown as a schematic perspective view.

[0063] In the example shown in Figure 4, the clear paint layer (40) is formed by spraying clear paint (42) in a mist onto the sealer layer (30) using a spray can (41) to create a clear layer (43).

[0064] As mentioned above, the clear paint layer (40) has improved adhesion between the clear paint layer (40) and the pattern layer (12) due to the formation of the sealer layer (30).

[0065] This clear coating layer (40) is intended to protect the outermost surface of the repaired portion (23) and to impart to the repaired portion (23) the necessary performance as an exterior decorative component (100).

[0066] The formation of the clear paint layer (40) completes the repair of the area to be repaired (20) shown in Figure 1, and it becomes the repaired area (23).

[0067] Figure 5 is a schematic partial cross-sectional view illustrating one embodiment of the configuration of a transfer paper in a method for repairing exterior decorative members according to the present invention, in which the repair is performed by a transfer method.

[0068] In the present invention, in a method of repairing a part to be repaired (20) by filling it with paint or pattern ink (21), this filling can be done in a wet manner, i.e., by applying the paint or pattern ink (21) using a brush (22), or in a dry manner, i.e., by transferring the layer corresponding to the paint or pattern ink onto the surface of the part to be repaired (20).

[0069] The example shown in Figure 5 illustrates one embodiment of a transfer paper (50) for transfer, which consists of a paper-based release liner (51), an adhesive layer (52), a pattern ink layer (53), and a plastic film layer (54). The pattern ink layer (53) can be used to form a desired pattern, for example, by printing.

[0070] There are no particular limitations on the printing method; for example, any known printing method such as gravure printing, offset printing, gravure offset printing, flexographic printing, screen printing, or inkjet printing can be appropriately selected and used.

[0071] Among these, gravure printing is preferred due to its productivity, suitability for printing on plastic film, and high resolution of the image, and can be selected considering the image of the exterior decorative component to be repaired.

[0072] Furthermore, when the pattern ink layer is created using a printing method, it is possible to make the design of the surface of the decorative material before repair and the paint or pattern ink layer transferred and used for repair the same or similar pattern or similar color tone, thereby making the repair marks less noticeable.

[0073] Here, the plastic film is a film made of a polymer resin composition, and can be made of, for example, polyolefins (polyethylene, polypropylene, etc.), polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, etc.), polyimides, etc., and can be selected as appropriate.

[0074] In particular, when using polypropylene or polyethylene terephthalate as plastic films, they are more preferable in terms of film strength and cost.

[0075] Prior to the transfer, the release paper (51) is first peeled off in the direction of the arrow (55), exposing the adhesive layer (52) and enabling the transfer of the pattern ink layer (53). In other words, the pattern ink layer (53) can be transferred to the repair target area (20) via the adhesive layer (52).

[0076] Furthermore, the transfer is completed by peeling and removing the plastic film layer (54) in the direction of the arrow (56). In other words, the transfer layer (57), which consists of an adhesive layer (52) and a pattern ink layer (53), is transferred to the part to be repaired (20).

[0077] Furthermore, in the transfer paper (50) according to the present invention, the paint or pattern ink layer (54) is characterized in that the polymer is composed of a resin having cross-linked bonds.

[0078] Figure 6 is a schematic partial cross-sectional view illustrating one embodiment of a repair method for exterior decorative members according to the present invention, specifically a method for filling the repair area with paint or pattern ink by transfer.

[0079] The example shown in Figure 6 is an example of repair using the transfer paper (50) shown in Figure 5, and also an example of surface treatment such as polishing and cleaning of the surface of the part to be repaired (60) prior to the repair.

[0080] In Figure 5, this surface treatment is represented by four small arrows (14) along the recess of the area to be repaired (60). Surface treatment can be performed by wiping the surface to remove dirt or by polishing the surface with sandpaper.

[0081] This is done with the intention of removing surface dirt and whitening, and also to make the surface smooth. Therefore, although not mentioned in the repair explanations shown in Figures 1 to 4, this pre-repair surface treatment can be performed as a common step in all cases.

[0082] The transfer paper (50) can be transferred by removing the release paper (51) to expose the adhesive layer (52), placing it opposite the area to be repaired (60), and pressing it down.

[0083] The layer that is transferred is the transfer layer (57) of the transfer paper (50), which consists of an adhesive layer (52) and a pattern ink layer (53). The plastic film layer (54) is peeled off and removed after the transfer.

[0084] Figure 7 is a schematic partial cross-sectional view illustrating the state after transfer in a method for repairing exterior decorative members according to the present invention, specifically a method for filling the repair area with paint or pattern ink by transfer.

[0085] Of the components of the transfer paper (50), the adhesive layer (52) and the pattern ink layer (53) are transferred as a transfer layer (57). The transfer is performed on the transfer target area (60), and the other parts and the plastic film layer (54) are peeled off and removed.

[0086] In this case, if the pattern layer (13) of the exterior decorative material and the pattern ink layer (53) to be transferred are similar in color tone and pattern, or are identical, the traces of repair will be less likely to remain, which is advantageous from a design perspective.

[0087] Figure 8 is a schematic partial cross-sectional view illustrating one embodiment of a repair method for exterior decorative members according to the present invention, specifically the step of providing a sealer layer on the surface of the repaired portion, as part of a transfer-based repair method.

[0088] In the present invention, the step of providing a clear paint layer (40) on the surface of the repaired portion can consist of the steps of providing a sealer layer (30) and providing a clear layer (53) of clear paint (42) on the surface using a spray can (41). In the example shown in Figure 8, the step of filling the repaired portion (60) with a transfer layer (57) via an adhesive layer (52) using a transfer paper (50), and then providing a sealer layer (30) on the surface of the repaired portion is shown.

[0089] In the example shown in Figure 8, the sealer layer (30) is formed by applying the sealer (32) to the surface of the transferred pattern layer (53) using a brush (31) and allowing it to dry to form a layer.

[0090] This sealer layer (30) is intended to improve the adhesion between the pattern layer (13) applied to the area to be repaired (60) and the clear paint layer (40) applied to the surface of the area to be repaired.

[0091] Figure 9 is a schematic partial cross-sectional view illustrating a step of applying a clear coat to the outermost surface by spray painting, as one embodiment of a repair method for exterior decorative members according to the present invention, specifically a repair method by transfer. However, a portion of the spray can (41) is shown as a schematic perspective view.

[0092] In the example shown in Figure 9, the clear paint layer (40) is formed by spraying clear paint (42) in a mist onto the sealer layer (30) using a spray can (41) to create a clear layer (43).

[0093] As mentioned above, the clear paint layer (40) has improved adhesion between the clear paint layer (40) and the pattern layer (13) formed on the area to be repaired (60) by transfer.

[0094] This clear coating layer (40) is intended to protect the outermost surface of the repaired portion (61) and to impart to the repaired portion (61) the necessary performance as an exterior decorative component (100).

[0095] The formation of the clear paint layer (40) completes the repair of the area to be repaired (60) shown in Figure 6, and it becomes the repaired area (61).

[0096] Thus, according to the present invention, in repairing exterior decorative members, in addition to repairing the design surface, a clear paint layer is provided on the surface of the repaired portion, making it possible to provide a repair method for exterior decorative members and a repair transfer paper that offers excellent workability during repair and excellent durability after repair. [Examples]

[0097] The present invention will be further described below with reference to examples and comparative examples. However, the present invention is not limited to the examples shown herein. The present invention is limited by the claims.

[0098] The effectiveness of the present invention was verified using Example 1 and Comparative Example 1 by the following method. The verification involved performing repair work on exterior decorative components that had areas requiring repair, and then evaluating the results.

[0099] The general procedure is as follows. Further details will be provided later. • Create transfer paper. Two types were prepared: an example and a comparative example. • Perform surface treatment on the area to be repaired. • Repair the area using the created transfer paper and then form a clear paint layer. As a construction test, the repaired materials were checked for dissolution, swelling, or disappearance of the repaired areas of the design after the repair was completed. As a durability test, a metal weather test was conducted and evaluated.

[0100] Details of the above construction test are as follows: The surface of the exterior decorative material, where the pattern has faded due to aging, is sanded using a sander. • Surface preparation I used #80 grit sandpaper. • Surface treatment I used #1000 grit sandpaper. Further water washing was performed.

[0101] The areas where the design had disappeared were treated as repair targets, and the design layer was transferred using transfer paper prepared as examples and comparative examples, and then filled in the areas to be repaired.

[0102] A clear paint layer was applied to the areas where the pattern layer had been filled in, marking the repaired area as complete.

[0103] After the repairs were completed, the following evaluations and judgments were made by visual inspection. If the repaired design area shows no dissolution, swelling, or disappearance: ○ Pass. If the repaired design area shows signs of dissolution, swelling, or disappearance: × Fail. That's what I decided.

[0104] Details of the above durability test are as follows: A metal weather test machine (manufactured by Daipla Wintes Co., Ltd.) was used. • Light mode: Illuminance 65mW / cm 2 Black panel temperature 63°C, humidity 50%, 20 hours • Humidity mode: Black panel, temperature 30°C, humidity 98%, 4 hours • Shower for 30 seconds before and after using the wet mode. These steps constituted one cycle, and 13 cycles were carried out.

[0105] After the test was completed, the following evaluations and judgments were made visually. No abnormalities observed in appearance: ○ Pass Slight whitening is visible on the exterior: △ Pass Abnormalities in appearance (cracks, yellowing, chalking, peeling): × Fail That's what I decided.

[0106] <Example 1> The structure of the transfer paper is as follows. This will be explained with reference to the example shown in Figure 5. Specifically, Figure 5 is a schematic partial cross-sectional view illustrating the structure of the transfer paper in Example 1.

[0107] • Pattern ink layer (53): A two-component curing urethane resin ink was used, which consists of a polyester polyol vehicle blended with 3% by weight of an isocyanate curing agent. • Plastic film layer (54): Colored polypropylene film (90 μm) without surface treatment (such as corona discharge treatment). • Printing method for the design: The wood grain pattern was printed using gravure printing.

[0108] • Release paper (51): Glassine paper separator (basis weight 70g / m²) 2 The surface was coated with direct silicone. • Adhesive layer (52): 1.4 parts of polyisocyanate curing agent (BXX5627: manufactured by Toyo Ink Mfg. Co., Ltd.) are added to an acrylic adhesive (Olivine BPS5762K), and 25 g / m² is printed using gravure printing. 2 The coating was applied to the surface of the release paper (51) and then laminated to the pattern ink layer (53) of the plastic film layer (54).

[0109] The details of the repair in Example 1 are as follows.

[0110] The surface of the exterior decorative material, where the pattern has faded due to aging, is sanded using a sander. • Surface preparation I used #80 grit sandpaper. • Surface treatment I used #1000 grit sandpaper. Further water washing was performed.

[0111] The areas where the design had disappeared were designated as the areas to be repaired, and the design layer was transferred using the transfer paper created in Example 1 to fill in the areas to be repaired.

[0112] A clear paint layer was applied to the areas where the pattern layer had been filled in, marking the repaired area as complete.

[0113] <Comparative Example 1> The composition of the transfer paper is as follows. This will be explained with reference to the example shown in Figure 5. Specifically, Figure 5 is a schematic partial cross-sectional view illustrating the composition of the transfer paper in Comparative Example 1.

[0114] • Pattern ink layer (53): An ink made of a polyester polyol vehicle was used. However, an isocyanate curing agent was not included. In other words, this part differs from Example 1 and deviates from the scope defined by the present invention. • Plastic film layer (54): Colored polypropylene film (90 μm) without surface treatment (such as corona discharge treatment). • Printing method for the design: The wood grain pattern was printed using gravure printing.

[0115] • Release paper (51): Glassine paper separator (basis weight 70g / m²) 2 The surface was coated with direct silicone. • Adhesive layer (52): 1.4 parts of polyisocyanate curing agent (BXX5627: manufactured by Toyo Ink Mfg. Co., Ltd.) were added to an acrylic adhesive (Olivine BPS5762K: manufactured by Toyo Ink Mfg. Co., Ltd.). The coating is applied using gravure printing at a rate of 25 g / m². 2The coating was applied to the surface of the release paper (51) and then laminated to the pattern ink layer (53) of the plastic film layer (54).

[0116] The details of the repair in Comparative Example 1 are as follows.

[0117] The surface of the exterior decorative material, where the pattern has faded due to aging, is sanded using a sander. • Surface preparation I used #80 grit sandpaper. • Surface treatment I used #1000 grit sandpaper. Further water washing was performed.

[0118] The area where the design had disappeared was treated as the area to be repaired, and the design layer was transferred using the transfer paper prepared in Comparative Example 1 to fill in the area to be repaired. This part differs from Example 1.

[0119] A clear paint layer was applied to the areas where the pattern layer had been filled in, marking the repaired area as complete.

[0120] The evaluation results are shown in Table 1.

[0121] [Table 1]

[0122] As is clear from the results shown in Table 1, Example 1 according to the present invention is superior to Comparative Example 1, which deviates from the scope defined in the present invention, in both the construction test and the durability test, and is therefore deemed acceptable.

[0123] In other words, in Example 1, the resin contained in the paint or pattern ink for the repaired portion, which is a feature of the present invention, contains a polymer component, and the polymer has a cross-linked structure. As a result, even when a clear paint layer is applied to the surface of the repaired portion, it is less susceptible to the effects of solvents, etc., and it is possible to prevent dissolution, swelling, and disappearance of the repaired portion, which is why it is believed to have passed the workability test.

[0124] Furthermore, in the durability test of Example 1, the resin contained in the paint or pattern ink of the repaired area contained a component made of polymers, and the polymers had a cross-linked structure. It is believed that this part was effective in improving weather resistance, which led to the approval rating.

[0125] On the other hand, in Comparative Example 1, since the paint or pattern ink of the repaired area did not contain a hardening agent, the polymer did not have a cross-linked structure. Therefore, when applying a clear paint layer to the surface of the repaired area, it was affected by the solvent, etc., and it was not possible to prevent the dissolution, swelling, and disappearance of the repaired area, which is thought to have resulted in a failure in the workability test.

[0126] Furthermore, in the durability test, Comparative Example 1 was deemed unsatisfactory because, as a hardening agent was not incorporated into the paint or pattern ink of the repaired area, the polymer did not have a cross-linked structure. This lack of effect in improving weather resistance led to the unsatisfactory result.

[0127] Thus, according to the present invention, it has been verified that in the repair of exterior decorative members, in addition to repairing the design surface, a clear paint layer is provided on the surface of the repaired portion, thereby providing a repair method for exterior decorative members and a repair transfer paper that offers excellent workability during repair and excellent durability after repair. [Explanation of Symbols]

[0128] 1...Base material 2...Adhesive layer 10. Cosmetic film 11. Plastic film layer 12. Pattern Layers 13. Pattern Layer 14···small arrow 20. Parts to be repaired 21. Paint or pattern ink 22...brush 23...Repaired part 30. Sealer layer 31...brush 32. Sealer 40. Clear paint layer 41... Spray can 42. Clear paint 43. Clear layer 50... Transfer paper 51...Release paper 52... Adhesive layer 53. Pattern ink layer 54. Plastic film layer 55...Arrow 56...Arrow 57...Transfer layer 60...Parts to be repaired 61...Repaired part 100... Exterior decorative components

Claims

1. A method for repairing exterior decorative components, The exterior decorative component has a patterned layer, The process includes the steps of repairing the pattern layer by filling the repaired portion with paint or pattern ink using a brush or pen so that the paint or pattern ink comes into contact with the repaired portion, and then applying a clear paint layer to the surface of the repaired portion. The paint or resin contained in the paint or pattern ink used for the repaired area contains components made up of polymers, and these polymers have cross-linked bonds. The step of applying a clear paint layer to the surface of the repaired portion comprises the steps of applying a sealer layer and applying a clear layer to the surface by spray painting. The aforementioned sealer layer is a layer formed with a solvent-based sealer. A method for repairing exterior decorative components, characterized in that the clear layer is a layer formed of a solvent-based paint.

2. The aforementioned polymer is a resin having crosslinking bonds, A method for repairing an exterior decorative member according to claim 1, characterized in that it is a polyolefin-based polyol-curable polyurethane resin.

3. The method for repairing an exterior decorative member according to claim 1 or claim 2, characterized in that the repaired portion is a recess in which a part of the pattern layer has disappeared.

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