Method for manufacturing lacquerware

Abstract

The present application relates to a kind of lacquerware preparation method, the preparation method includes: sequentially on the surface of matrix surface texture, making first raw lacquer layer, first polishing, making second raw lacquer layer and second polishing, wherein, the convex height of the surface texture is H, the thickness of first raw lacquer layer is T1, the thickness of second raw lacquer layer is T2, and H=3.5×T1~4.5×T1, T1=1.8×T2~2.2×T2.The present application can realize the accurate control of process parameters by establishing the quantitative relationship between the convex height of texture and the thickness of lacquer layer, so as to obtain high-quality lacquerware with natural texture, smooth lacquer layer and firm combination.

Description

Technical Field

[0001] This invention relates to the field of lacquerware technology, and in particular to a method for preparing lacquerware. Background Technology

[0002] In the production of lacquerware, the creation of surface texture is a crucial step in enhancing the artistic effect and tactile quality of the object. Currently, the surface texture of lacquerware largely relies on handcrafting, creating surface textures by adding raised dots. However, existing handcrafted texture creation lacks a unified standard for controlling the height of these raised dots, resulting in inconsistent heights and irregular distribution. This makes it difficult to evenly cover the surface with the subsequent lacquer layer, leading to significant differences in lacquer layer thickness between the top and bottom of the raised dots. Consequently, the texture and lacquer layers often exhibit distinct interfaces and unnatural integration. Furthermore, due to differences in curing shrinkage and hardness between the textured dots and the lacquer layer, a noticeable discontinuity often appears between them. This interface defect results in insufficient overall bonding strength between the lacquer layer and the base material, making the lacquer layer prone to peeling and flaking, severely impacting the lifespan and structural stability of the lacquerware.

[0003] In addition, traditional processes lack clear process control methods for the smooth integration between textured bumps and paint layers, which often results in problems such as abrupt textured bumps, uneven paint layer accumulation, and rough texture on the finished product surface, making it difficult to meet the modern aesthetic requirements for delicate and natural textures.

[0004] Therefore, the uncontrollability of textured protrusions, insufficient bonding strength between the lacquer layer and the body, and poor interface fusion all influence each other and jointly restrict the improvement of lacquerware quality. How to achieve a smooth transition and uniform bonding between textured protrusions and the lacquer layer while preserving the artistic expression of handmade textures, and how to improve the overall bonding strength between the lacquer layer and the body, has become an important problem that urgently needs to be solved in the current lacquerware production technology field. Summary of the Invention

[0005] Therefore, it is necessary to provide a method for preparing lacquerware to address the above problems. This method establishes a quantitative relationship between the height of the texture protrusions and the thickness of the lacquer layer, thereby achieving precise control of process parameters and obtaining high-quality lacquerware with natural texture, smooth lacquer layer, and strong adhesion.

[0006] A method for preparing lacquerware, the method comprising: sequentially creating a surface texture on the surface of a body, creating a first lacquer layer, performing a first polishing, creating a second lacquer layer, and performing a second polishing, wherein the height of the raised points of the surface texture is H, the thickness of the first lacquer layer is T1, the thickness of the second lacquer layer is T2, and H = 3.5 × T1 ~ 4.5 × T1, T1 = 1.8 × T2 ~ 2.2 × T2.

[0007] In one embodiment, H = 2.5 × (T1 + T2) ~ 3 × (T1 + T2).

[0008] In one embodiment, the height H of the protrusions in the surface texture is 500 μm to 800 μm.

[0009] In one embodiment, the thickness T1 of the first lacquer layer is 120 μm to 200 μm.

[0010] In one embodiment, the thickness T2 of the second lacquer layer is 60 μm to 100 μm.

[0011] In one embodiment, the surface roughness of the tire carcass is 30 μm to 50 μm;

[0012] And / or, the thickness of the tire body is greater than or equal to 2 mm.

[0013] In one embodiment, the matrix is ​​selected from copper matrix.

[0014] In one embodiment, the preparation steps of the first lacquer layer include: first applying a first lacquer, and then curing it at a temperature of 20°C to 28°C and a relative humidity of 75% to 85% to obtain the first lacquer layer.

[0015] In one embodiment, the preparation steps of the second lacquer layer include: first applying a second lacquer, and then curing it at a temperature of 20°C to 28°C and a relative humidity of 75% to 85% to obtain the second lacquer layer.

[0016] In one embodiment, after the second lacquer layer is prepared, it is further heat-treated at a temperature of 160°C to 180°C for 25 min to 40 min.

[0017] In the preparation method of the present invention, by establishing a quantitative relationship between the height H of the textured bump and the thickness T1 of the first lacquer layer (H=3T1~5T1), the exposed height of the top of the bump after the first lacquer layer is coated is controlled within a reasonable range. This can avoid the risk of interface cracking caused by the bump being too deep, and ensure that the bottom of the bump is fully covered by the lacquer layer after curing, forming a continuous structural transition. This improves the bonding stability between the lacquer layer and the substrate. At the same time, after the first polishing to make the top of the bump flush with the surface of the first lacquer layer, the distance from the bottom to the top of the bump is moderate, which can form a naturally exposed and delicate texture effect.

[0018] By controlling the quantitative relationship between the thickness T1 of the first lacquer layer and the thickness T2 of the second lacquer layer (T1=1.8T2~2.2T2), an indirect linkage constraint is formed between T2 and H (from H=3.5T1~4.5T1 and T1=1.8T2~2.2T2, we can get H=6.3T2~9.9T2). This ensures that after the second fine polishing, the second lacquer layer can not only cover the traces of the first polishing and form a surface gloss, but also reveal the underlying texture, achieving a rich visual effect. At the same time, the second lacquer layer covers and protects the surface of the first lacquer layer after the first polishing, making up for the microscopic defects caused by the first polishing, and works with the first lacquer layer to withstand external forces and block environmental erosion, thereby enhancing the overall durability and long-term bonding stability of the lacquer layer.

[0019] Therefore, this invention, through the coupling of two formulas, locks the three process parameters H, T1, and T2 into a mutually restrictive closed loop, achieving precise global control from the underlying texture to the surface protection. This effectively solves the problems of uneven coverage and unnatural fusion caused by the varying heights and irregular distribution of texture protrusions in existing technologies, as well as the problems of interface discontinuity and insufficient bonding strength caused by the difference between the protrusions and the lacquer layer materials. As a result, high-quality lacquerware with natural texture, smooth lacquer layer, and strong bonding is obtained. At the same time, it provides clear quantitative control targets for the production of texture protrusions, the production of the first raw lacquer layer, and the production of the second raw lacquer layer, improving the overall process controllability and yield rate while preserving the artistic expression of handmade texture. Detailed Implementation

[0020] To facilitate understanding of the present invention, it will be described in more detail below. However, it should be understood that the present invention can be implemented in many different forms and is not limited to the embodiments or examples described herein. Rather, these embodiments or examples are provided to make the disclosure of the present invention more thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments or examples only and is not intended to limit the invention. The optional scope of the term "and / or" as used herein includes any one of two or more of the related listed items, as well as any and all combinations of the related listed items, including any two related listed items, any more related listed items, or a combination of all related listed items.

[0022] In this invention, numerical ranges are involved. Unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe features or characteristics, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0023] The method for preparing lacquerware provided by this invention mainly achieves precise control of process parameters by establishing a quantitative relationship between the height of surface texture protrusions and the thickness of the raw lacquer layer, thereby obtaining high-quality lacquerware with natural texture, smooth lacquer layer and firm bonding.

[0024] Specifically, the preparation method includes: sequentially creating a surface texture on the surface of the body, creating a first lacquer layer, performing a first polishing, creating a second lacquer layer, and performing a second polishing, wherein the height of the protrusions of the surface texture is H, the thickness of the first lacquer layer is T1, the thickness of the second lacquer layer is T2, and H = 3.5 × T1 ~ 4.5 × T1, T1 = 1.8 × T2 ~ 2.2 × T2.

[0025] During the curing process, the first layer of raw lacquer will undergo curing shrinkage. However, the shrinkage rate of the raised material is different from that of raw lacquer. If the raised material is too deep, i.e., H / T1 is too large, the root of the raised material will hinder the shrinkage of the lacquer layer, generating excessive tensile stress at the interface, which can easily lead to micro-cracks, weaken the bonding stability between the lacquer layer and the substrate, and even cause the lacquer layer to lift or peel off. If the raised material is too shallow, i.e., H / T1 is too small, the raised material will be covered too deeply by the first layer of raw lacquer, making it difficult to show the texture effect and affecting the final artistic expression.

[0026] Therefore, in this invention, by controlling the quantitative relationship between the height H of the raised dots on the surface texture and the thickness T1 of the first lacquer layer, the exposed height of the top of the raised dots after the first lacquer layer is coated is controlled within a reasonable range. This can avoid the risk of interface cracking caused by excessively deep raised dots, and ensure that the bottom of the raised dots is fully covered by the lacquer layer after curing, forming a continuous structural transition. This improves the bonding stability between the lacquer layer and the substrate. At the same time, after the first polishing to make the top of the raised dots flush with the surface of the first lacquer layer, the distance from the bottom to the top of the raised dots is moderate, which can form a naturally exposed and delicate texture effect.

[0027] Furthermore, if T1 is too large relative to T2, the second lacquer layer will be too thin and unable to completely cover the microscopic scratches and defects caused by the first polishing, resulting in insufficient surface gloss and weakened protection and synergistic effect on the first lacquer layer. If T1 is too small relative to T2, the second lacquer layer will be too thick and will excessively cover the exposed texture bumps below, resulting in blurred texture layers or even completely covering the texture effect and losing the artistic value of handmade texture.

[0028] Therefore, this invention also controls the quantitative relationship between the thickness T1 of the first lacquer layer and the thickness T2 of the second lacquer layer. Through this relationship, an indirect linkage constraint is formed between T2 and H (from H=3.5T1~4.5T1 and T1=1.8T2~2.2T2, we can get H=6.3T2~9.9T2). This ensures that after the second fine polishing, the second lacquer layer can not only cover the traces of the first polishing and form a surface gloss, but also reveal the underlying texture, achieving a rich visual effect. At the same time, the second lacquer layer covers and protects the surface of the first lacquer layer after the first polishing, making up for the microscopic defects caused by the first polishing, and works with the first lacquer layer to withstand external forces and block environmental erosion, thereby enhancing the overall durability and long-term bonding stability of the lacquer layer.

[0029] Therefore, this invention, through the coupling of two formulas, locks the three process parameters H, T1, and T2 into a mutually restrictive closed loop, achieving precise global control from the underlying texture to the surface protection. This effectively solves the problems of uneven coverage and unnatural fusion caused by the varying heights and irregular distribution of texture protrusions in existing technologies, as well as the problems of interface discontinuity and insufficient bonding strength caused by the difference between the protrusions and the lacquer layer materials. As a result, high-quality lacquerware with natural texture, smooth lacquer layer, and strong bonding is obtained. At the same time, it provides clear quantitative control targets for the production of texture protrusions, the production of the first raw lacquer layer, and the production of the second raw lacquer layer, improving the overall process controllability and yield rate while preserving the artistic expression of handmade texture.

[0030] Although the top of the protrusion is flush with the surface of the first lacquer layer after the first polishing, the embedment depth of the protrusion (i.e., the distance from the bottom of the protrusion to the surface of the first lacquer layer) is still indirectly affected by the proportional relationship between H and T1, T2. When H is less than 2.5×(T1+T2), the embedment depth of the protrusion is relatively shallow, the interface contact area between the protrusion and the lacquer layer is small, and the lacquer layer's wrapping and anchoring effect on the protrusion is limited. When H is greater than 3×(T1+T2), the protrusion is embedded too deeply, and the first lacquer layer is prone to generating large concentrated tensile stress at the root of the protrusion during curing shrinkage, which may induce interface microcracks and adversely affect the long-term bonding stability. Therefore, this invention further preferably controls H within the range of 2.5×(T1+T2)~3×(T1+T2), which can ensure sufficient interface bonding area and effectively avoid interface damage caused by excessive curing shrinkage stress, thereby making the bond between the lacquer layer and the matrix more solid.

[0031] Optionally, the height H of the raised dots in the surface texture is 500μm to 800μm. This range is suitable for most handmade texture creation scenarios, ensuring both a visible three-dimensional effect and facilitating uniform coverage of subsequent paint layers. It is understood that the height of the raised dots can be adjusted according to the specific dimensions of the substrate and design requirements.

[0032] Optionally, the thickness T1 of the first lacquer layer is 120μm~200μm, which is sufficient to fully cover the bottom of the protrusion without causing excessive curing shrinkage stress due to excessive thickness; the thickness T2 of the second lacquer layer is 60μm~100μm, which is sufficient to effectively cover the first polishing marks without excessively covering the texture protrusion.

[0033] Appropriate surface roughness can enhance the mechanical interlocking force between the carcass and the first lacquer layer, and further improve the bonding strength. Therefore, the surface roughness of the carcass described in this invention is preferably 30μm~50μm.

[0034] Optionally, the thickness of the tire body is greater than or equal to 2mm, such as 2mm, 2.5mm, 3mm, etc., to ensure that the tire body has sufficient structural strength and to avoid deformation during subsequent grinding and curing processes.

[0035] Optionally, the base material is selected from copper base material, so that the lacquerware obtained is copper base lacquerware.

[0036] Optionally, the preparation steps of the first lacquer layer include: firstly applying a first lacquer, and then curing it at a temperature of 20℃~28℃ and a relative humidity of 75%~85% to obtain the first lacquer layer. These temperature and humidity conditions ensure that the lacquer is fully cross-linked and cured, forming a dense and hard lacquer film, improving the stability of the lacquer film, and preventing the lacquer film from peeling or flaking off.

[0037] Optionally, the preparation steps of the second lacquer layer include: first applying a second lacquer, and then curing it at a temperature of 20℃~28℃ and a relative humidity of 75%~85% to obtain the second lacquer layer, which is conducive to the interface fusion between the two lacquer layers and reduces interlayer stress.

[0038] It is understandable that before making the second layer of raw lacquer, the process also includes outlining and painting with colored lacquer according to the design pattern. The colored lacquer is made by mixing mineral pigments such as azurite, malachite, cinnabar, and ochre with natural raw lacquer in a certain proportion, such as a mass ratio of 1:2 to 1:3.

[0039] Optionally, after obtaining the second lacquer layer, the process further includes heat treatment at 160℃~180℃ for 25min~40min, which can further promote the cross-linking reaction of the lacquer layer, improve the hardness and weather resistance of the lacquer film, and release the internal stress generated during the curing process, thereby enhancing the long-term stability of the lacquer layer.

[0040] It is understandable that the precision of the first and second sanding is different. The second sanding uses a sanding tool with a higher grit to improve the efficiency of the first sanding and the surface effect such as the gloss of the paint layer after the second sanding. Preferably, the first sanding uses 400-600 grit sandpaper and the second sanding uses 800-1000 grit sandpaper.

[0041] It is understandable that the precision of the first and second sanding is different. The second sanding uses a sanding tool with a higher grit to improve the efficiency of the first sanding and the surface effect such as the gloss of the lacquer layer after the second sanding. Preferably, the first sanding uses 400-600 grit sandpaper, sanding until the top of the raised points of the surface texture is flush with the upper surface of the first lacquer layer, so that the raised points are just exposed; the second sanding uses 800-1000 grit sandpaper, sanding until the surface of the second lacquer layer has a mirror-like gloss, while making the outline of the raised points clearly visible without being overly covered, and the thickness removed by the second sanding generally does not exceed 1 / 3 of the thickness T2 of the second lacquer layer, more preferably not more than 1 / 4, and more preferably not more than 1 / 5. Those skilled in the art can judge the sanding endpoint by visual observation and touch. The actual amount of sanding can be adaptively adjusted according to the curing degree of the lacquer layer, the grit of the sandpaper, and the desired surface effect, as long as it ensures that the surface of the second lacquer layer has a mirror-like gloss and the outline of the raised points is clearly visible after sanding.

[0042] The technical solution of the present invention will be further described below through specific embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Unless otherwise specified, specific conditions in the embodiments are performed under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments used without specified manufacturers are all commercially available conventional products.

[0043] Example 1

[0044] A copper substrate with a thickness of 2mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in a 70℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40μm.

[0045] The surface texture of the floral pattern is created on the pre-treated copper body by hand carving. The average height of the raised points of the surface texture is 600μm.

[0046] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 150μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0047] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 80μm. After curing, the copper-bodied lacquerware was baked in an oven at 170℃ for 30 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 900-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0048] Example 2

[0049] A copper substrate with a thickness of 3mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in a 70℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 35μm.

[0050] A floral texture was created on the pretreated copper substrate using a surface sticker method, with the raised dots of the surface texture having a height of 540μm.

[0051] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 22°C and a relative humidity of 78% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 120μm. After curing, the substrate was sanded for the first time with 400-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0052] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 22℃ and 78% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 60μm. After curing, the copper-bodied lacquerware was baked in an oven at 160℃ for 40 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 800-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0053] Example 3

[0054] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0055] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 650μm.

[0056] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 155μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0057] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 75μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0058] Example 4

[0059] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 50 μm.

[0060] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 700μm.

[0061] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at 28°C and 85% relative humidity for 24 hours to complete curing, forming a first raw lacquer layer with a thickness of 200μm. After curing, the substrate was sanded for the first time with 600-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0062] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 28℃ and 85% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 100μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0063] Example 5

[0064] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0065] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 800μm.

[0066] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete curing, forming a first raw lacquer layer with a thickness of 180μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0067] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 82μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0068] Example 6

[0069] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0070] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 500μm.

[0071] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 135μm. After curing, the substrate was first sanded with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0072] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 70μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0073] Comparative Example 1

[0074] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0075] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 600μm.

[0076] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete curing, forming a first raw lacquer layer with a thickness of 200μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0077] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 100μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0078] Comparative Example 2

[0079] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0080] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 700μm.

[0081] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 150μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0082] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 80μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0083] Comparative Example 3

[0084] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0085] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 600μm.

[0086] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 150μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0087] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 60μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0088] Comparative Example 4

[0089] A copper substrate with a thickness of 2.5 mm was selected, and its surface was mechanically polished. After polishing, it was cleaned with alcohol to remove surface oil and impurities, and then dried in an 80℃ oven for later use. After testing, the surface roughness of the copper substrate after pretreatment was 40 μm.

[0090] A floral texture was created on the pre-treated copper body using a hand-molded method, with the raised points of the texture having a height of 550μm.

[0091] The first raw lacquer was evenly applied to the surface of the copper substrate after the above treatment, and then placed in a constant temperature and humidity chamber at an ambient temperature of 25°C and a relative humidity of 80% for 24 hours to complete the curing, forming a first raw lacquer layer with a thickness of 150μm. After curing, the substrate was sanded for the first time with 500-grit sandpaper to make the top of the protrusions flush with the surface of the first raw lacquer layer.

[0092] The floral pattern was outlined with raw lacquer according to the design. A colored lacquer was prepared by mixing azurite mineral pigment and natural raw lacquer in a 1:2.5 mass ratio, and applied in layers until the pattern was clear. A second layer of raw lacquer was then applied, and the piece was placed in a constant temperature and humidity chamber at 25℃ and 80% relative humidity for 24 hours to cure, forming a second lacquer layer with a thickness of 90μm. After curing, the copper-bodied lacquerware was baked in an oven at 180℃ for 25 minutes, then removed and allowed to cool naturally to room temperature. Finally, it was finely polished with 1000-grit sandpaper to obtain the finished copper-bodied lacquerware.

[0093] The main data and results of the above embodiments and comparative examples are shown in Tables 1 and 2.

[0094] Table 1

[0095]

[0096] Table 2

[0097]

[0098] Adhesion: Refer to GB / T 9286-2001 "Paints and Varnishes Cross-cut Test".

[0099] Condition after hot and cold cycling: Refer to GB / T 1735-2009, keep at -20℃ for 2 hours, then immediately transfer to 50℃ for 2 hours, cycle 10 times, and observe whether the paint layer blisters or peels off.

[0100] Texture clarity: The percentage of texture protrusions within a unit area (10cm×10cm) that are clear and without blurring or discontinuity.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for preparing lacquerware, characterized in that, The preparation method includes: sequentially creating a surface texture on the surface of the carcass, creating a first lacquer layer, performing a first polishing, creating a second lacquer layer, and performing a second polishing, wherein the height of the raised points of the surface texture is H, the thickness of the first lacquer layer is T1, the thickness of the second lacquer layer is T2, and H = 3.5 × T1 ~ 4.5 × T1, T1 = 1.8 × T2 ~ 2.2 × T2.

2. The method for preparing lacquerware according to claim 1, characterized in that, H = 2.5 × (T1 + T2) ~ 3 × (T1 + T2).

3. The method for preparing lacquerware according to claim 1, characterized in that, The height H of the protrusions in the surface texture is 500μm~800μm.

4. The method for preparing lacquerware according to claim 1, characterized in that, The thickness T1 of the first lacquer layer is 120μm~200μm.

5. The method for preparing lacquerware according to claim 1, characterized in that, The thickness T2 of the second lacquer layer is 60μm~100μm.

6. The method for preparing lacquerware according to any one of claims 1 to 5, characterized in that, The surface roughness of the tire body is 30μm~50μm; And / or, the thickness of the tire body is greater than or equal to 2 mm.

7. The method for preparing lacquerware according to any one of claims 1 to 5, characterized in that, The matrix is ​​selected from copper matrix.

8. The method for preparing lacquerware according to any one of claims 1 to 5, characterized in that, The preparation steps of the first lacquer layer include: firstly coating with the first lacquer, and then curing it at a temperature of 20℃~28℃ and a relative humidity of 75%~85% to obtain the first lacquer layer.

9. The method for preparing lacquerware according to any one of claims 1 to 5, characterized in that, The preparation steps of the second lacquer layer include: first applying the second lacquer, and then curing it at a temperature of 20℃~28℃ and a relative humidity of 75%~85% to obtain the second lacquer layer.

10. The method for preparing lacquerware according to any one of claims 1 to 5, characterized in that, After obtaining the second lacquer layer, the process also includes heat treatment at 160℃~180℃ for 25min~40min.

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