Champagne gold film layer, application of champagne gold film layer in automobile inner rearview mirror and preparation method of champagne gold film layer

Abstract

The invention relates to the technical field of surface treatment, and particularly discloses a champagne golden film layer and application and a preparation method thereof in an automobile inside rear-view mirror, the champagne golden film layer comprises a base material, a color matching layer is arranged on the base material, a metal reflecting layer is arranged on the color matching layer, an ink layer is arranged on the metal reflecting layer, and a white positioning line is further arranged on the ink layer; wherein the toning layer is an indium tin oxide layer; and the metal reflecting layer is a Cr film layer. When the champagne gold automobile inside rear-view mirror is prepared, ITO is deposited on the glass substrate through vacuum magnetron sputtering to serve as a color mixing layer; depositing a Cr film layer as a metal reflecting layer; the champagne gold automobile inside rear-view mirror is prepared by the following steps: preparing a Cr film layer, then silk-screening reverse cover ink and a protective frame area on the Cr film layer, silk-screening a white positioning line, and finally etching the visible area Cr film layer by using a Cr etching solution and etching the visible area ITO color matching layer by using an ITO etching solution in sequence. The film layer is simple in structure, the preparation method is easy to implement, cost is low, and the film layer is suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to the technical field of surface treatment, and in particular to a champagne gold film layer and its application in an automobile interior rearview mirror and a preparation method thereof. Background Art

[0002] In the field of automobile manufacturing technology, the appearance design of automobiles has always been one of the important factors that attract consumers' attention. Among them, the rearview mirror of the car, as an important part of the car, not only affects the beauty of the car, but also directly affects the driving safety. Therefore, the surface treatment technology of the rearview mirror of the car has received widespread attention.

[0003] Champagne gold is a new color for the frame of the rearview mirror inside the car. This color usually matches the interior of high-end cars and enhances the overall sense of luxury. At present, the main manufacturing methods of champagne gold film on the market are plastic spraying, electrophoresis, water plating, and vacuum coating. Plastic spraying color has the disadvantages of no metallic luster and easy aging; electrophoresis and water plating have the disadvantages of poor corrosion resistance, a lot of wastewater, easy discoloration, and poor wear resistance; vacuum coating is an environmentally friendly surface treatment process. The deposited coating has the characteristics of wear resistance, oxidation resistance, no discoloration, high hardness, rich colors, and good corrosion resistance. It has gradually become the main production technology of champagne gold film on the market.

[0004] Vacuum magnetron sputtering coating technology can change the color, glossiness, weather resistance and other properties of the substrate surface by coating one or more layers of thin film on the substrate surface. Due to its environmental protection, low deposition temperature, fast deposition speed, rich colors and excellent coating comprehensive performance, it has gradually become the mainstream surface treatment process. Applicable substrates include stainless steel, titanium alloy, plastic parts, glass, etc.

[0005] CN211497760U discloses a champagne gold PVD film, which is composed of a bottom Cr coating layer, a first CrN transition layer, a second TiCrZrN transition layer and a TiCrZrCN color layer. Physical vapor deposition (PVD) technology is used to coat metal targets with different metal element ratios and nitrogen and acetylene gas as reaction gases, and finally a champagne gold film layer is formed on the surface of the substrate. The film layer structure is complex and the coating cost is high; and the wet etching process is difficult to etch and remove the multi-layer film layer, and it is difficult to ensure the appearance effect of the edge of the frame. Summary of the invention

[0006] The invention provides a champagne gold film layer and its application in an automobile interior rearview mirror and a preparation method. The film layer has a simple structure, is easy to prepare, has a low cost, and is suitable for industrial production.

[0007] The technical solution of the present invention is to provide a champagne gold film layer, including a substrate, a color adjustment layer is provided on the substrate, a metal reflective layer is provided on the color adjustment layer, an ink layer is provided on the metal reflective layer, and a white positioning line is also provided on the ink layer; wherein the color adjustment layer is an indium tin oxide layer; and the metal reflective layer is a Cr film layer.

[0008] Optionally, the indium tin oxide of the color-adjusting layer is replaced by niobium oxide or titanium oxide.

[0009] Optionally, the thickness of the color adjustment layer is 120-160 nanometers.

[0010] Optionally, the thickness of the metal reflective layer is between 30 and 100 nanometers.

[0011] The present invention also relates to the application of the champagne gold film layer in an interior rearview mirror of an automobile, wherein the substrate is glass.

[0012] The present invention also relates to a method for preparing a champagne gold automobile interior rearview mirror, comprising the following steps: S1, using vacuum magnetron sputtering coating process to deposit ITO as a coloring layer on a glass substrate; S2, depositing a Cr film layer on the toning layer by vacuum magnetron sputtering; S3, screen printing reverse cover ink and white positioning lines on the Cr film layer, and then etching away the Cr film layer in the visible area using Cr etching solution; S4, etching and removing the ITO color-adjusting layer in the visible area by using an ITO etching solution; Get a champagne gold car interior rearview mirror.

[0013] Optionally, the temperature of the vacuum magnetron sputtering coating in S1 is 300-450° C., the vacuum degree is 0.1-0.6 Pa, and the working gas is argon.

[0014] Optionally, the temperature of the vacuum magnetron sputtering coating in S2 is 100-200° C., the vacuum degree is 0.1-0.6 Pa, and the working gas is argon.

[0015] The champagne color of the present invention is presented from the non-film layer of the substrate, and the ink is the film layer that covers it. When the rearview mirror is in use, the film layer is attached to the inside, and it is champagne color when viewed from the outside. The role of the ink is to protect the film layer in the frame area from being etched during etching; it can also protect the film layer from being scratched, corroded, etc. The positioning line is used to determine the fitting position when the rearview mirror and the display module are fitted.

[0016] The present invention has the following beneficial effects: The present invention places an indium tin oxide (ITO) layer between a glass substrate and a chromium layer by combining a simple color-adjusting film layer with a metal reflective film layer, and uses the thickness and refractive index of the indium tin oxide film layer to adjust the reflection color of the frame area to achieve the desired champagne gold color. Conventional indium tin oxide targets and chromium targets can be used for coating. At the same time, since the film layer structure is simple and easy to etch, when removing the champagne gold film layer in the visible area, the metal reflective layer and the color-adjusting layer can also be removed separately through two etching processes, and the edge etching effect is neat and without jagged edges. The preparation method provided by the present invention has a simple process and low cost, and is suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the champagne gold automobile rearview mirror provided in Example 1 of the present invention.

[0018] Figure 2 This is a real picture of the champagne gold automobile rearview mirror according to Example 1 of the present invention. DETAILED DESCRIPTION

[0019] The experimental methods in the following examples are conventional methods unless otherwise specified. The raw materials, reagents, etc. used in the following examples are commercially available products unless otherwise specified.

[0020] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0021] Example 1 The present invention provides a vehicle-mounted champagne gold rearview mirror, the structure of which is as follows: Figure 1 As shown, its preparation method is: S1. Clean the glass substrate, use indium tin oxide (ITO) as the target, and use vacuum magnetron sputtering coating process to deposit an ITO film layer on the substrate. The parameters of the magnetron sputtering process are as follows: temperature is 300°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the ITO film layer is controlled at 140 nanometers.

[0022] S2. Using a chromium target as a chromium source, a Cr film layer is deposited on the color-adjusting layer by vacuum magnetron sputtering. The parameters of the magnetron sputtering process are as follows: temperature is 150°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the Cr film layer is controlled to be 80 nanometers; S3, screen printing reverse cover ink on the Cr film layer to protect the frame area, then screen printing white positioning lines on the reverse cover ink, and finally etching away the Cr film layer in the visible area using Cr etching solution; S4, etching and removing the ITO color-adjusting layer in the visible area by using an ITO etching solution; Get a champagne gold car interior rearview mirror.

[0023] The actual picture of the prepared rearview mirror is as follows Figure 2 As shown, the reflectance chromaticity is tested using a spectrophotometer, the color is L=78, a=-8, b=9, the color is uniform and stable with good repeatability.

[0024] Example 2 The present invention provides a vehicle-mounted champagne gold rearview mirror, and the preparation method thereof is as follows: S1. Clean the glass substrate, use indium tin oxide (ITO) as the target, and use vacuum magnetron sputtering coating process to deposit an ITO film layer on the substrate. The parameters of the magnetron sputtering process are as follows: temperature is 300°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the ITO film layer is controlled at 120 nanometers.

[0025] S2. Using a chromium target as a chromium source, a Cr film layer is deposited on the coloring layer by vacuum magnetron sputtering. The parameters of the magnetron sputtering process are as follows: temperature is 150°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the Cr film layer is controlled to be 100 nanometers; S3, screen printing reverse cover ink on the Cr film layer to protect the frame area, and then screen printing white positioning lines on the reverse cover ink; S4, etching away the Cr film layer in the visible area using the Cr etching solution; S5, etching and removing the ITO color-adjusting layer in the visible area by using an ITO etching solution; Get a champagne gold car interior rearview mirror.

[0026] The reflective color of the rearview mirror is tested using a spectrophotometer, the color is L=75, a=-5, b=3, the color is uniform and stable with good repeatability.

[0027] Example 3 The present invention provides a vehicle-mounted champagne gold rearview mirror, and the preparation method thereof is as follows: S1. Clean the glass substrate, use indium tin oxide (ITO) as the target, and use vacuum magnetron sputtering coating process to deposit an ITO film layer on the substrate. The parameters of the magnetron sputtering process are as follows: temperature is 300°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the ITO film layer is controlled at 150 nanometers.

[0028] S2. Using a chromium target as a chromium source, a Cr film layer is deposited on the coloring layer by vacuum magnetron sputtering. The parameters of the magnetron sputtering process are as follows: temperature is 150°C, vacuum degree is 0.5Pa, and working gas is argon. The thickness of the Cr film layer is controlled to be 90 nanometers; S3, screen printing reverse cover ink on the Cr film layer to protect the frame area, and then screen printing white positioning lines on the reverse cover ink; S4, etching away the Cr film layer in the visible area using the Cr etching solution; S5, etching and removing the ITO color-adjusting layer in the visible area by using an ITO etching solution; Get a champagne gold car interior rearview mirror.

[0029] The reflective color of the rearview mirror was tested using a spectrophotometer, and the color was L=79, a=-9, b=14. The color was uniform and stable with good repeatability.

[0030] Example 4 is based on Example 1, with the only difference being that ITO is replaced by a niobium oxide layer of equal thickness.

[0031] The reflective color of the rearview mirror was tested using a spectrophotometer, and the color was L=77, a=-10, b=9. The color was uniform and stable with good repeatability.

[0032] It can be seen that although niobium oxide can also be used as a color adjustment layer to achieve champagne gold reflective film processing, the refractive index of the niobium oxide film is less affected by the atmosphere and is stable at around 2.3. Therefore, the adjustment span of the reflection color is small only by adjusting the thickness of the Nb2O5 film, and it is only suitable for specific champagne gold color film processing.

[0033] Comparative Example 1 Based on Example 1, if the chrome layer is plated in step S2 first and then the ITO layer is plated in step S1, the champagne gold color effect cannot be achieved.

[0034] The above embodiments describe the preferred implementation of the present invention, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A champagne gold film layer, characterized in that: The invention comprises a substrate, a color adjustment layer is arranged on the substrate, a metal reflection layer is arranged on the color adjustment layer, an ink layer is arranged on the metal reflection layer, and a white positioning line is arranged on the ink layer; wherein the color adjustment layer is an indium tin oxide layer; and the metal reflection layer is a Cr film layer.

2. The champagne gold film layer according to claim 1, characterized in that: The indium tin oxide of the color-adjusting layer is replaced by niobium oxide or titanium oxide.

3. The champagne gold film layer according to claim 1 or 2, characterized in that: The thickness of the color adjustment layer is 120-160 nanometers.

4. The champagne gold film layer according to claim 1, characterized in that: The thickness of the metal reflective layer is between 30 and 100 nanometers.

5. Use of the champagne gold film layer according to any one of claims 1 to 4 in an automobile interior rearview mirror, wherein the substrate is glass.

6. A method for preparing a champagne gold automobile interior rearview mirror, characterized in that: The following steps are involved: S1, using vacuum magnetron sputtering coating process to deposit ITO as a coloring layer on a glass substrate; S2, depositing a Cr film layer on the toning layer by vacuum magnetron sputtering; S3, screen printing reverse cover ink and white positioning lines on the Cr film layer to protect the frame area, and then using Cr etching solution to etch away the Cr film layer in the visible area; S4, etching and removing the ITO color-adjusting layer in the visible area by using an ITO etching solution; Get a champagne gold car interior rearview mirror.

7. The method according to claim 6, characterized in that: The temperature of vacuum magnetron sputtering coating in S1 is 300~450℃, the vacuum degree is 0.1~0.6Pa, and the working gas is argon.

8. The method according to claim 6, characterized in that: The temperature of vacuum magnetron sputtering coating in S2 is 100~200℃, the vacuum degree is 0.1~0.6Pa, and the working gas is argon.

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