Fine base material multicolor vacuum coating method

Abstract

The invention relates to the technical field of thin base material multicolor vacuum coating, in particular to a thin base material multicolor vacuum coating method. The method comprises the following steps: performing a series of process treatments such as cutting, cleaning, ink coating, baking, curing, exposing, developing, etching, vacuum coating, ink re-coating, laser etching, secondary etching, cleaning, secondary vacuum coating, fingerprint-proof oil coating, film covering, punch forming and the like on a base material to form a first film-coated plate and a second film-coated plate with two color layers; and a specific alkaline etching solution and a cleaning solution containing active components are adopted to meet the high-precision requirement of a fine base material. The technical effects that the coating quality is improved, the coating binding force is high, and the multicolor effect is attractive are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of multi-color vacuum coating of thin substrates, and in particular to a multi-color vacuum coating method of thin substrates. Background Art

[0002] With the rapid development of society and the continuous updating of aesthetic concepts, diversified product designs are becoming more and more popular in the market. Especially for the appearance design of some high-end products, diversified color matching has become a trend, which not only improves the beauty of the products, but also enhances the market competitiveness. However, traditional manufacturing processes are often difficult to meet this demand, especially in the multi-color processing of fine parts, which poses great challenges.

[0003] Existing car speaker grilles usually only have one color. If you want to achieve a two-color or multi-color effect, the common practice is to use a paint pen or a brush to fill in partial masking, and cooperate with the coating process to achieve a multi-color effect. In addition, you can also use the method of spraying different colors to obtain a multi-color appearance. Although these two methods can achieve a multi-color effect to a certain extent, when dealing with parts with complex details, especially for those products with small through holes and semi-engraved structures, these methods are often difficult to ensure high-precision multi-color surface coating quality and stability after coating. In practical applications, the method of filling with a paint pen or a brush requires very high manual skills to ensure that the color of the adjacent area will not be affected, while spraying multiple colors is difficult to maintain clear boundaries between colors under complex patterns.

[0004] When the above conventional means are applied to products with fine structures, the main problems are that the operation is difficult, the production efficiency is low, and it is easy to cause staining of adjacent areas. For example, the requirements for the technique during the filling process are very high, and the color of other parts will be affected if you are not careful; and in the case of multi-color spraying, it is difficult to ensure the clear boundaries between the colors, especially when the pattern is more complex, it is even more difficult to avoid the occurrence of color mixing. In addition, the existing coating process also has problems with the stability after coating, and cannot meet the high-standard product requirements. Therefore, how to achieve accurate and stable surface multi-color coating has become a key issue that needs to be solved urgently. Summary of the invention

[0005] In order to ensure the stability of multi-color coating patterns in mass production and improve product quality and product qualification rate, the present application provides a multi-color vacuum coating method for a thin substrate.

[0006] The present application provides a thin substrate multi-color vacuum coating method, which is prepared by the following method: 1) Cut and clean the substrate to obtain a sample; 2) Applying ink on the sample, baking, curing, forming a first ink layer, exposing, developing, etching once, etching the ink layer, removing ink, cleaning, forming etching lines in the etched area, the width of the etching lines is 0.5-1.5mm, and obtaining an etched part; 3) vacuum coating the etched lines of the etched part to form a first color layer, thereby obtaining a first coated part; 4) Applying ink again on the surface of the first coated part, baking, curing, forming a second ink layer, laser engraving, forming a laser engraved pattern on the first coated part, and the first color layer and the laser engraved pattern do not overlap, and the texture width of the laser engraved pattern is 0.5-1.5mm, to obtain a laser engraved part; 5) The laser engraved pattern of the laser engraved part is etched for the second time, then cleaned, and then subjected to a second vacuum coating to form a second color layer on the laser engraved pattern of the laser engraved part, and the ink is removed to obtain a second coated part; 6) The second coated piece is coated with anti-fingerprint oil, laminated, and punched to obtain a thin substrate multi-color product.

[0007] By adopting the above technical solution, the fine substrate multi-color vacuum coating method achieves a fine multi-color coating effect on the product surface.

[0008] Specifically, in step 1), the substrate is cut into a suitable size, and then cleaned to ensure that there is no stain on the surface of the substrate, so as to facilitate subsequent coating processes.

[0009] In step 2), after the ink is applied, it is baked to completely solidify the ink and form a first ink layer evenly coated on one surface of the substrate. After exposure and development, the part to be etched is exposed to facilitate etching. After etching, the ink at the etched position loosens and falls off, the ink is removed, and then cleaning is performed to remove all the remaining ink. At this time, the etched area forms etching lines, and the etching lines form an etching pattern.

[0010] In step 3), the etched lines presented by the etched part are vacuum coated, so that a vacuum coating layer is coated on the etched lines to achieve the coating of the first color layer.

[0011] In step 4), the ink is applied again. At this time, the ink covers one side of the first color layer of the entire etched part, and then it is baked and cured to obtain a second ink layer. In the laser engraving process, a laser engraving pattern is formed on the first coated part, and the first color layer and the laser engraving pattern do not overlap. The laser engraving process removes a part of the ink layer to form a laser engraving pattern, which is convenient for subsequent etching to ensure processing accuracy and production efficiency.

[0012] In step 5), the laser engraved pattern obtained in step 4) is etched. At this time, all the remaining thickness is etched away, and after cleaning, a second color layer is formed on its surface; due to two coatings, it is difficult to completely remove the ink layer in a short time, and a certain depth is formed in the laser engraving process, which is convenient for subsequent vacuum coating, maintaining the progress of etching, and improving production efficiency.

[0013] Step 6), applying nail polish, laminating and other processes to obtain products with various colors and fine textures.

[0014] In summary, a clean base is formed through cutting and cleaning; ink is applied and etched lines are formed through exposure, development and etching, and then the first color layer is formed through vacuum coating; ink is applied again and laser engraving is used to form a laser engraving pattern that does not overlap with the first color layer; the subsequent secondary etching and vacuum coating further form the second color layer on the laser engraving pattern; finally, anti-fingerprint oil is applied, lamination and stamping are performed to form the product with a complex two-color effect. This process step can not only achieve precise coating stability within the width range of 0.5-1.5mm, but also improve the quality and production efficiency of multi-color products.

[0015] Preferably, both the first etching and the second etching use an alkaline etching solution.

[0016] By adopting the above technical solution, it is ensured that alkaline etching solution is used in both the first etching and the second etching, which improves the etching accuracy and efficiency, thereby achieving precise etching of complex patterns on the surface of fine substrates, effectively avoiding the high requirements of traditional filling methods on personnel techniques and the color pollution problems that may be caused, and significantly improving the appearance quality and production efficiency of multi-color coated products.

[0017] Preferably, the alkaline etching solution consists of sodium hydroxide, potassium permonosulfate complex salt, sodium hexametaphosphate and water.

[0018] By adopting the above technical solution, the alkaline etching solution is composed of sodium hydroxide, potassium permonosulfate complex salt, sodium hexametaphosphate and water, which ensures precise control of fine lines during the etching process, avoids unnecessary influence on other areas, and improves etching accuracy.

[0019] Preferably, in the specific processes of the first vacuum coating and the second vacuum coating, a target material is used and then magnetron sputtering is performed to form a coating layer.

[0020] By adopting the above technical solution, using target materials and forming a coating layer through magnetron sputtering, it is possible to achieve precise coating on the surface of a fine substrate, ensure the uniformity and adhesion of the coating, and effectively improve the quality and aesthetics of multi-color coated products.

[0021] Preferably, the sputtering gas pressure is 0.3-0.5 Pa, the sputtering power is 10-15 Kw, the target-substrate distance is 20-50 mm, the sputtering temperature is 70-80° C., and the gas flow rate is 300-800 ml / min.

[0022] By adopting the above technical solution, the precise control of sputtering parameters in the process of multi-color vacuum coating of fine substrates is achieved, the quality and uniformity of the coating layer are ensured, and the coating efficiency and product reliability are improved. Specifically, the sputtering pressure is set in the range of 0.3-0.5Pa, which is conducive to maintaining a stable plasma state and ensuring the density and adhesion of the coating layer; the sputtering power is set between 10-15Kw, which can effectively balance the relationship between yield and coating quality; the target-base distance is selected within 20-50mm, which helps to enhance the uniformity of thin film deposition; the sputtering temperature is set in the range of 70-80℃, which can improve the atomic migration ability of the material and promote the crystallization of the thin film; the gas flow rate is adjusted to 300-800ml / min, which optimizes the gas utilization rate and further improves the coating quality and production efficiency.

[0023] Preferably, the thickness of the first color layer is 18-30 μm, and the thickness of the second color layer is 18-30 μm.

[0024] By adopting the above technical solution, the thickness of the first color layer is controlled at 18-30μm, so that the first color layer not only has good coverage and uniformity, but also ensures the appearance texture after coating, and is easy to etch, thereby ensuring the accuracy of etching and improving processing efficiency; the thickness of the second color layer is controlled at 18-30μm, which ensures the adhesion and durability of the second color layer, further enhances the decorativeness and functionality of the product, and at the same time, ensures the accuracy of etching and the convenience of processing.

[0025] Preferably, the cleaning agent used in the cleaning process in step 2) and step 4) is an acid anhydride-containing active cleaning solution.

[0026] By adopting the above technical solution, the acid anhydride active cleaning liquid can effectively remove grease, dirt and other impurities on the surface of the substrate, improve the cleanliness and glossiness of the substrate surface, and improve the polarity and wettability of the substrate surface, while providing rust and oxidation protection, providing a clean and pollution-free base for subsequent processing or treatment. Thereby improving the convenience and stability of coating on the surface of the substrate, making the formed first color layer and second color layer have higher adhesion, avoiding the possibility of falling off during use or during cleaning, etching, ink removal, etc., and improving its practicality.

[0027] Preferably, the acid anhydride-containing active cleaning solution is composed of the following raw materials in percentage by weight: Ethylene glycol dimethyl ether 3-5% Coconut oil fatty acid diethanolamide 0.5-1.5% Alkenyl succinic anhydride 1.3-1.8% N,N-(4-methyl-1,3-phenylene)bismaleimide 0.5-1% Double activated group siloxane 0.3-1% Potassium peroxymonosulfate complex salt 0.01-0.05% The balance is water.

[0028] By adopting the above technical scheme, ethylene glycol dimethyl ether not only dilutes and promotes the dissolution of alkenyl succinic anhydride, but also promotes the dissolution of the ink layer in the texture; coconut oil fatty acid diethanolamide increases the surface activity and wets the surface of the texture, which helps N,N-(4-methyl-1,3-phenylene) bismaleimide and diactivated group siloxane to adhere to its surface.

[0029] After the above ingredients are compounded, they can enhance the cleaning effect, improve wettability, enhance stability and corrosion inhibition performance, and form a protective layer on the texture surface to prevent oxidation corrosion of the substrate before vacuum coating, making the substrate surface easy to coat and improving the adhesion stability of the color layer formed after coating.

[0030] When the raw material system of the cleaning liquid containing anhydride is used, after cleaning, the raw material system is easily adsorbed on the surface of the substrate. When vacuum coating is performed, the coating temperature is 70-80°C. At this time, the raw material system adsorbed on the surface of the material is further solidified under the influence of temperature and other factors to form a film layer that stably adheres to the coating layer and the substrate, thereby significantly improving the stability of the coating.

[0031] Reduce the possibility of the first color layer and the second color layer falling off, while promoting the accuracy of the coating. Improve the production efficiency and quality of fine substrate multi-color products in the mass production process. At the same time, reduce the possibility of the first color layer and the second color layer of fine substrate multi-color products falling off during use.

[0032] Preferably, the dual-activated group siloxane is cyclohexyl-γ-aminopropylmethyldimethoxysilane and / or bis-3-methylacryloxypropylated tetramethyldisiloxane.

[0033] By adopting the above technical scheme, cyclohexyl-γ-aminopropylmethyldimethoxysilane and bis-3-methylpropyleneoxypropylated tetramethyldisiloxane are used as dual-activated group siloxanes to improve the polarity and wettability of the substrate surface, effectively remove impurities such as grease, dirt and dust on the substrate surface, and at the same time improve the thermal stability, mechanical strength and chemical corrosion resistance of the material, and protect the substrate surface from corrosion and oxidation, further ensuring the high-quality production of fine substrate multi-color products in subsequent processes.

[0034] Preferably, the weight ratio of the cyclohexyl-γ-aminopropylmethyldimethoxysilane to the bis-3-methylacryloxypropylated tetramethyldisiloxane is 1:(0.2-1).

[0035] By adopting the above technical scheme, the weight ratio of cyclohexyl-γ-aminopropylmethyldimethoxysilane and bis-3-methylpropyleneoxypropylated tetramethyldisiloxane is 1:(0.2-1), which effectively improves the polarity and wettability of the substrate surface, and thoroughly removes impurities such as grease, dirt and dust on the substrate surface, ensuring that subsequent processing obtains a high-quality and high-cleanliness substrate surface.

[0036] In summary, this application has the following beneficial effects: 1. By adopting a specific etching process and vacuum coating technology, this application can achieve high-precision multi-color surface coating on products with fine structures, solving the problem of adjacent area staining caused by difficult operation in traditional processes; 2. The special anhydride cleaning agent formula is used to effectively remove grease, dirt and other impurities on the surface of the substrate, improve the stability and adhesion of the subsequent coating, and thus improve the quality and durability of the final product; 3. Combining precise coating, curing, etching, cleaning and laser engraving processes, this application achieves dual-color and multi-color coating effects on fine lines (width 0.5-1.5mm), solves the problem of unclear boundaries between colors under complex patterns, and significantly enhances the aesthetics and market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 This is a picture obtained by a thin substrate multi-color vacuum coating method of this application. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 The present application is further described in detail with reference to the accompanying drawings and embodiments.

[0039] Introduction of some raw materials: The deinking agent is composed of ethylene glycol dimethyl ether, isopropyl alcohol, OP-10, anhydrous ethanol, sodium bicarbonate, and water in a weight ratio of 1:1:0.1:0.9:0.5:2.5; The cleaning agent is composed of OP-10, anhydrous ethanol, sodium bicarbonate, water, and potassium hydroxide in a weight ratio of 0.1:1:0.3:10:0.1; ink: Guangzhou Weiqiao New Materials Co., Ltd., model ME-001; The first target material is: black tin dioxide target, purity 99%; The target material for the second time is: titanium nitride target material is golden yellow, purity is 99%; The molecular structure of alkenyl succinic anhydride is as follows:

[0040] Preparation Example of an Anhydride-Containing Active Cleaning Fluid Preparation Example 1 An acid anhydride-containing active cleaning solution is prepared by the following method: According to weight percentage, 1.3% of alkenyl succinic anhydride was weighed and dissolved in 3% of ethylene glycol dimethyl ether to obtain a mixture A; then 1.5% of coconut oil fatty acid diethanolamide, 1% of N,N-(4-methyl-1,3-phenylene) bismaleimide, 0.3% of double activated group siloxane, 0.01% of potassium permonosulfate complex salt, 92.89% of water were weighed and put into a stirring device with all the mixture A, and stirred at a speed of 100r / min until all were fully mixed to obtain an acid anhydride active cleaning solution.

[0041] The di-activated group siloxane is cyclohexyl-γ-aminopropylmethyldimethoxysilane.

[0042] Preparation Example 2-3 The difference between Preparation Example 2-3 and Preparation Example 1 is that the amount of raw materials used is different, as shown in Table 1; Table 1 Raw material dosage of preparation examples 1-3 (%) raw material Preparation Example 1 Preparation Example 2 Preparation Example 3 Ethylene glycol dimethyl ether 3 4 5 Coconut oil fatty acid diethanolamide 1.5 1 1 Alkenyl succinic anhydride 1.3 1.5 1.8 N,N-(4-Methyl-1,3-phenylene)bismaleimide 1 0.8 2 Dual activated group siloxane 0.3 0.6 0.8 Potassium peroxymonosulfate complex salt 0.01 0.02 0.03 water 92.89 92.08 89.37 Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 2 is that the dual-activated group siloxane is bis-3-methylacryloxypropylated tetramethyldisiloxane.

[0043] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 2 is that the dual activated group siloxane is composed of cyclohexyl-γ-aminopropylmethyldimethoxysilane and bis-3-methacryloxypropylated tetramethyldisiloxane in a weight ratio of 1:0.2.

[0044] Preparation Example 6 The difference between Preparation Example 6 and Preparation Example 2 is that the dual activated group siloxane is composed of cyclohexyl-γ-aminopropylmethyldimethoxysilane and bis-3-methacryloxypropylated tetramethyldisiloxane in a weight ratio of 1:0.5.

[0045] Preparation Example 7 The difference between Preparation Example 7 and Preparation Example 2 is that the dual activated group siloxane is composed of cyclohexyl-γ-aminopropylmethyldimethoxysilane and bis-3-methacryloxypropylated tetramethyldisiloxane in a weight ratio of 1:1.

[0046] Preparation Comparative Example Preparation Comparative Example 1 The difference between Preparation Comparative Example 1 and Preparation Example 1 is that an equal amount of alkenyl succinic anhydride is replaced by coconut oil fatty acid diethanolamide.

[0047] Preparation Comparative Example 2 The difference between Preparation Comparative Example 2 and Preparation Example 1 is that an equal amount of N,N-(4-methyl-1,3-phenylene)bismaleimide is replaced by coconut oil fatty acid diethanolamide.

[0048] Preparation Comparative Example 3 The difference between Preparation Comparative Example 3 and Preparation Example 1 is that an equal amount of the dual activated group siloxane is replaced with coconut oil fatty acid diethanolamide. Example

[0049] Example 1 A multi-color vacuum coating of a thin substrate is prepared by the following method: 1) The substrate made of 304 stainless steel is transferred to the cutting mechanism for cutting, then transferred to the cleaning tank containing the cleaning agent for soaking for 1 minute, then rinsed with tap water, and dried in an oven at 100°C for 1 minute to complete the cleaning and obtain the sample; 2) The sample is transferred to the coating mechanism to be coated with ink, and then placed in a 100°C oven for drying for 1 minute, and then irradiated with a UV lamp for 80 seconds to completely solidify it, forming a first ink layer on the surface of the sample, and then exposed and developed, and then transferred to the etching mechanism to be etched once, so that the ink layer is etched, and the etched ink is peeled off to complete the ink removal. Then it is transferred to the cleaning mechanism and sprayed with an active cleaning liquid for cleaning. In the spraying process, the active cleaning liquid is aimed at the etched position and sprayed at a working pressure of 200 bar for cleaning for 10 seconds, so that the remaining stains, dust and ink are cleaned, and then the water on the surface is air-dried to form etching lines in the etched area. The width of the etching lines can be uniform or non-uniform. The lines in this embodiment are preferably non-uniform, and the width of the lines is within 0.5-1.5mm, and the etching lines form an etching pattern to obtain an etched part; 3) The etched part is transferred to a vacuum coating mechanism, the etched lines on the etched part are subjected to vacuum coating, and a first color layer is formed on the etched lines to obtain a first coated part; 4) The first coated part is transferred to another coating mechanism, and ink is applied to one side of the first color layer of the first coated part, and the ink is baked and cured. The baking and curing process is the same as step 2. A second ink layer is formed on the first coated part, and then laser engraving is performed. The laser frequency is 40000 Hz, and the laser engraving depth is 20 μm. A laser engraving pattern is formed on the first coated part, and the first color layer does not overlap with the laser engraving pattern. The texture width of the laser engraving pattern can be uniform or non-uniform. The texture of this embodiment is preferably non-uniform, and the texture width is within 0.5-1.5 mm to obtain a laser engraved part; 5) The laser engraved part is transferred to another etching mechanism. At this time, the temperature on the laser engraved pattern is 80°C, which is convenient for etching the laser engraved pattern of the laser engraved part and realizing secondary etching of the substrate. Most of the ink layer will fall off during the etching process, and then it is transferred to another cleaning mechanism for cleaning. The cleaning process is the same as step 2), but the cleaning object is the laser engraved coating after etching, and the working pressure is 250bar, and the cleaning time is 20s. Then it is transferred to another vacuum coating mechanism, and a second vacuum coating is performed on the cleaned laser engraved pattern to form a second color layer on the laser engraved pattern of the laser engraved part. It is transferred to a tank containing an ink remover and soaked for 1 minute. In fact, all the ink layers on the surface fall off, and then it is rinsed with clean water, and then the surface moisture is dried to complete the ink removal, and the second coated part is obtained; 6) The second coated piece is coated with AF anti-fingerprint oil, and a protective film is applied to the surface of the first color layer and the second color layer, and then stamped to obtain a thin substrate multi-color product. Figure 1 As shown, the golden lines in the figure are the second color layer, and the black lines are the first color layer.

[0050] The transmission rate of the transmission process in the above process is 10s / m.

[0051] The alkaline etching solution is composed of sodium hydroxide, potassium permonosulfate complex salt, sodium hexametaphosphate and water in a weight ratio of 1:0.3:0.5:10.

[0052] The vacuum coating process of step 3) and step 5) is as follows: a target material is used and then a coating layer is formed by magnetron sputtering. The sputtering pressure is 0.3 Pa, the sputtering power is 15 Kw, the target-substrate distance is 20 mm, the sputtering temperature is 70° C., and the gas flow rate is 300 ml / min.

[0053] The target material for the first time is tin dioxide target; the target material for the second time is titanium nitride.

[0054] The thickness of the first color layer is 18 μm, and the thickness of the second color layer is 18 μm.

[0055] In terms of weight, the active cleaning solution consists of 5% of ethylene glycol dimethyl ether, 1% of potassium permonosulfate complex salt, and 94% of water.

[0056] Example 2 The difference between Example 2 and Example 1 is that the vacuum coating parameters are different, as follows: The sputtering gas pressure was 0.5 Pa, the sputtering power was 12 Kw, the target-substrate distance was 40 mm, the sputtering temperature was 75° C., and the gas flow rate was 500 ml / min.

[0057] The thickness of the first color layer is 25 μm, the thickness of the second color layer is 25 μm, and the rest are the same.

[0058] Example 3 The difference between Example 3 and Example 1 is that the vacuum coating parameters are different, as follows: The sputtering gas pressure is 0.4Pa, the sputtering power is 10Kw, the target substrate distance is 50mm, the sputtering temperature is 80°C, the gas flow rate is 800ml / min, and the thickness of the first color layer is 30μm, the thickness of the second color layer is 30μm, and the rest are the same.

[0059] Example 4 The difference between Example 4 and Example 1 is that the cleaning solution is the acid anhydride-containing active cleaning solution obtained in Preparation Example 1.

[0060] Example 5-13 The difference between Example 5-13 and Example 4 is that the acid anhydride active cleaning solution is different, as shown in Table 2; Table 2 Sources of the anhydride-containing active cleaning solutions of Examples 4-13 Example Source of anhydride-containing active cleaning fluid Example 4 Preparation Example 1 Example 5 Preparation Example 2 Example 6 Preparation Example 3 Example 7 Preparation Example 4 Example 8 Preparation Example 5 Example 9 Preparation Example 6 Example 10 Preparation Example 7 Embodiment 11 Comparison document 1 Example 12 Comparison document 2 Embodiment 13 Comparison document 3 Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the laser engraving process in step 4 is not included.

[0061] Performance testing Detection method / test method qualified rate: Observe whether the patterns on the surface of the fine substrate multi-color products obtained in Examples 1-13 and Comparative Example 1 are incomplete, mixed colors, unclear patterns, uneven textures, different texture patterns from the samples, and obviously different texture widths in the same area (such as comparing the texture on the sample and the texture on the produced product, if the width of the corresponding texture on the sample is obviously different, such as the corresponding position error value is greater than 0.1mm), etc. If more than one of these phenomena occurs, it shall be recorded as unqualified and the qualified rate shall be calculated.

[0062] Adhesion stability: GB / T9286-2021, tested using the hundred-grid knife method, specifically: use 3M600 test tape to stick on the first color layer and the second color layer of the second coated part, flatten it with a force of 20N to ensure that there are no bubbles or looseness, peel off the tape at a uniform speed, observe through a magnifying glass, and calculate the proportion of the peeled area.

[0063] The specific process is shown in Table 3; Table 3 Experimental data of Examples 1-13 and Comparative Example 1 Test items Pass rate (%) The percentage of shedding area (%) Example 1 91 1.66 Example 2 92 1.72 Example 3 91 1.76 Example 4 97 0.64 Example 5 98 0.57 Example 6 98 0.59 Example 7 97 0.67 Example 8 100 0.35 Example 9 100 0.16 Example 10 100 0.27 Embodiment 11 95 1.23 Example 12 96 1.32 Embodiment 13 96 1.19 Comparative Example 1 84 5.89 Combining Example 1 and Comparative Example 1 and Table 3, it can be seen that the qualified rate of Comparative Example 1 is lower than the qualified rate of Example 1, and the shedding area ratio of Comparative Example 1 is higher than the shedding area ratio of Example 1, indicating that the process steps of the present application can further improve the adhesion stability of the vacuum coating, improve the adhesion stability of the product in the production process, improve the product production efficiency and the qualified rate of the product.

[0064] By comparing Example 2 and Example 4 and combining with Table 3, it can be seen that the qualified rate of Example 2 is lower than the qualified rate of Example 4, and the shedding area of ​​Example 2 accounts for a higher proportion than the shedding area of ​​Example 4, indicating that the anhydride-containing active cleaning agent obtained by compounding ethylene glycol dimethyl ether, coconut oil fatty acid diethanolamide, alkenyl succinic anhydride, N,N-(4-methyl-1,3-phenylene) bismaleimide, diactivated group siloxane, potassium permonosulfate complex salt, and water has a better cleaning effect, can remove residual oil, stains, etc., and at the same time, can improve the adhesion stability of vacuum coating, further improve the adhesion stability of the first color layer and the second color layer, reduce the occurrence of shedding and the like, and improve the quality of fine substrate multi-color products.

[0065] By comparing Example 11 with Example 4 and combining with Table 3, it can be seen that the qualified rate of Example 11 is lower than the qualified rate of Example 4, and the shedding area of ​​Example 11 accounts for a higher proportion than the shedding area of ​​Example 4, indicating that when ethylene glycol dimethyl ether, coconut oil fatty acid diethanolamide, alkenyl succinic anhydride, N,N-(4-methyl-1,3-phenylene) bismaleimide, diactivated group siloxane, potassium permonosulfate complex salt, and water are compounded, a better comprehensive effect can be obtained, the adhesion stability of the first color layer and the second color layer can be further improved, the occurrence of shedding and the like can be reduced, and the quality of fine substrate multi-color products can be improved.

[0066] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A multi-color vacuum coating method for a thin substrate, characterized in that: Prepared by the following method: 1) Cut and clean the substrate to obtain a sample; 2) Apply ink on the sample, bake, cure, form the first ink layer, expose, develop, etch once, etch the ink layer, remove ink, clean, form etching lines in the etched area, the width of the etching lines is 0.5-1.5mm, and obtain the etched part; 3) Vacuum coating the etched lines of the etched part to form a first color layer, thereby obtaining a first coated part; 4) Apply ink again on the surface of the first coated part, bake and solidify to form a second ink layer, and laser engrave to form a laser engraved pattern on the first coated part, and the first color layer and the laser engraved pattern do not overlap, and the texture width of the laser engraved pattern is 0.5-1.5mm, so as to obtain a laser engraved part; 5) The laser engraved pattern of the laser engraved part is etched for the second time, then cleaned, and then vacuum coated for the second time to form a second color layer on the laser engraved pattern of the laser engraved part, remove the ink, and obtain a second coated part; 6) The second coated part is coated with anti-fingerprint oil, laminated, and stamped to obtain a fine substrate multi-color product.

2. A multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: The first etching and the second etching both use alkaline etching solution.

3. A multi-color vacuum coating method for a thin substrate according to claim 2, characterized in that: The alkaline etching solution consists of sodium hydroxide, potassium peroxymonosulfate composite salt, sodium hexametaphosphate and water.

4. The multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: In the specific process of the first vacuum coating and the second vacuum coating, a target material is used and then magnetron sputtering is performed to form a coating layer.

5. The multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: The sputtering gas pressure is 0.3-0.5 Pa, the sputtering power is 10-15 Kw, the target-substrate distance is 20-50 mm, the sputtering temperature is 70-80° C., and the gas flow rate is 300-800 ml / min.

6. The multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: The thickness of the first color layer is 18-30 μm, and the thickness of the second color layer is 18-30 μm.

7. The multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: The cleaning agent used in the cleaning process in step 2) and step 4) is an acid anhydride-containing active cleaning solution.

8. A multi-color vacuum coating method for a thin substrate according to claim 7, characterized in that: The anhydride-containing active cleaning solution is composed of the following raw materials in percentage by weight: Ethylene glycol dimethyl ether 3-5% Coconut oil fatty acid diethanolamide 0.5-1.5% Alkenyl succinic anhydride 1.3-1.8% N,N-(4-methyl-1,3-phenylene)bismaleimide 0.5-1% Double activated group siloxane 0.3-1% Potassium peroxymonosulfate complex salt 0.01-0.05% The balance is water.

9. The multi-color vacuum coating method for a thin substrate according to claim 1, characterized in that: The dual-activated group siloxane is cyclohexyl-γ-aminopropylmethyldimethoxysilane and / or bis-3-methacryloxypropylated tetramethyldisiloxane.

10. The multi-color vacuum coating method for a thin substrate according to claim 3, characterized in that: The weight ratio of the cyclohexyl-γ-aminopropylmethyldimethoxysilane to bis-3-methylacryloxypropylated tetramethyldisiloxane is 1:(0.2-1).

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