A translucent micro-nano textured film for automotive interior trim, its preparation method, and interior trim components.

Abstract

This invention discloses a translucent micro / nano-structure textured film for automotive interiors, its preparation method, and interior parts. The film, from bottom to top, comprises a high-transmittance polymer substrate layer, a first printing ink layer, a micro / nano-structure layer formed by UV transfer from a release film and subsequent curing, a PVD electroplating layer with translucency and conductivity, a second printing ink layer as a compensation layer, a varnish layer, and an adhesive layer. The compensation layer corrects color deviations introduced by the PVD electroplating layer, the varnish layer provides wear-resistant, scratch-resistant, and anti-aging protection, and the adhesive layer enables adhesion to the interior substrate. The preparation method provides two routes: hot stamping lamination and adhesive lamination, and defines key parameters for UV transfer and PVD, achieving a synergistic effect of translucent decoration, conductive antistatic properties, and consistent appearance.

Description

Technical Field

[0001] This invention relates to the field of automotive interior decoration and functional film technology, specifically to a translucent micro-nano structure textured film for automotive interiors and its preparation method, and to automotive interior parts containing the film. Background Technology

[0002] With the upgrading of automobile consumption, consumers' requirements for the visual quality, functional practicality, and durability of car interiors are constantly increasing. As a core component for decoration and protection, automotive interior film is widely used in key areas such as the center console, door panels, and dashboard. Especially in interior components with light-transmitting display functions, it is necessary to simultaneously meet the dual requirements of uniform light transmission and exquisite decorative texture.

[0003] Current automotive interior window films suffer from several technical shortcomings: First, traditional films often feature macroscopic designs, using simple coating or embossing processes, resulting in poor texture clarity, insufficient layering, and a conflict between light transmittance and decorative appeal, making them unsuitable for the visual demands of high-end interiors. Second, the film structure design is often flawed, with weak interlayer bonding, leading to delamination and peeling over time. Furthermore, they lack scratch and high-temperature resistance, failing to withstand the high temperatures and daily wear and tear inside the car. Third, the fabrication of micro-nano structure films relies heavily on complex photolithography techniques, resulting in cumbersome and inefficient production processes. Inaccurate process parameter control leads to poor product consistency and high costs for large-scale production. Fourth, some films pose a risk of harmful substance residue, failing to meet automotive interior environmental standards. Additionally, their unstable conductivity makes them prone to accumulating static electricity and attracting dust, negatively impacting the user experience.

[0004] Therefore, developing a translucent micro-nano structure textured film for automotive interiors with a scientifically designed structure, balanced performance, and efficient and environmentally friendly manufacturing process has become an urgent need for the industry. Summary of the Invention

[0005] This invention aims to provide a translucent micro-nano structure textured film for automotive interiors, its preparation method, and interior parts, to solve the problems that existing translucent decorative films for automotive interiors often suffer from when trying to balance the needs of light transmission and decorative texture, such as insufficient texture fineness, difficulty in reconciling conductivity and antistatic ability with light transmission, color deviation and poor appearance consistency after introducing an electroplated conductive layer, and insufficient wear resistance, scratch resistance, and anti-aging stability after application. Thus, it achieves a synergistic improvement in micro-nano texture decoration, light transmission, conductivity and antistatic properties, color compensation consistency, and durability protection within the same film system, and is suitable for surface application of interior parts such as automotive center console panels, door panels, dashboards, and armrest boxes.

[0006] According to a first aspect of the present invention, a translucent micro-nano structure textured film for automotive interior is provided, the translucent micro-nano structure textured film comprising, from bottom to top: a high-translucent polymer substrate layer, a first printing ink layer, a micro-nano structure layer, a PVD electroplating layer having light transmittance and conductivity, a second printing ink layer, a varnish layer, and an adhesive layer. The micro-nano structure layer is formed by transferring and curing a release film through a UV transfer process to create a micro-nano structure texture on the film surface. The PVD electroplating layer is disposed on the surface of the micro / nano structure layer; The second printing ink layer is disposed on the surface of the PVD electroplated layer and serves as a compensation layer to correct the color deviation introduced by the PVD electroplated layer; The varnish layer is used to provide wear-resistant, scratch-resistant and anti-aging protection to the surface of the film; The adhesive layer is used to attach the film to the surface of the automotive interior substrate.

[0007] In some technical solutions, the high-transmittance polymer substrate layer is a polycarbonate substrate layer or a polymethyl methacrylate substrate layer; The polycarbonate substrate layer has a thickness of 50–80 μm and a transmittance of ≥80%, while the polymethyl methacrylate substrate layer has a thickness of 40–70 μm and a transmittance of ≥78%.

[0008] In some technical solutions, the micro / nano structure layer includes one or more of the following: The micro / nano structure layer is formed by replicating a grayscale image; The micro-nano structure layer has a micro-nano structure size accuracy of 100–500 nm; The thickness of the micro / nano structure layer is 3–5 μm; The texture type of the micro / nano structure texture is selected from one or more of the following: three-dimensional ripple texture, dot array texture, and biomimetic texture.

[0009] In some technical solutions, the PVD electroplated layer includes one or more of the following: The material of the PVD electroplated layer is an indium tin alloy; The material of the PVD electroplated layer is a zinc-aluminum alloy; The thickness of the PVD electroplated layer is 0.1–0.3 μm; The PVD electroplated layer meets the antistatic requirements and has a resistance value >1000 MΩ.

[0010] In some technical solutions, the thickness of the first printing ink layer is 2 to 3 μm, the thickness of the second printing ink layer is 1 to 2 μm, and both the first printing ink layer and the second printing ink layer are environmentally friendly inks.

[0011] In some technical solutions, the varnish layer is a water-based varnish layer, and the total thickness of the varnish layer is 7±2 μm and is formed by two coatings.

[0012] In some technical solutions, the adhesive layer is a water-based environmentally friendly adhesive layer, the thickness of the adhesive layer is 3 to 5 μm and there is no adhesive residue after peeling.

[0013] According to a second aspect of the present invention, a method for preparing a translucent micro / nano structure textured film for automotive interiors is further provided, comprising the following steps: Pretreatment of the high-transmittance polymer substrate layer; A first printing ink layer is formed on the high-transmittance polymer substrate layer; The micro-nano structure on the release film is transferred to the first printed ink layer and cured to form a micro-nano structure layer by UV transfer printing process, wherein the UV transfer speed is 4 to 6 m / min and the UV irradiation energy is 800 to 1000 mJ / cm². The layer structure after the formation of the micro-nano structure layer is hot-stamped and laminated, with a hot-stamping lamination pressure of 0.25 MPa; A PVD electroplated layer with light transmittance and conductivity is formed on the micro / nano structure layer using a PVD process, wherein the PVD electroplating temperature is 150–200 °C and the vacuum degree is 1 × 10⁻⁶. -3 Pa; A second printed ink layer is formed on the PVD electroplated layer as a compensation layer; A varnish layer is formed on the second printing ink layer; An adhesive layer is formed on the varnish layer; The resulting film is cut and inspected.

[0014] According to a second aspect of the present invention, another method for preparing a translucent micro / nano structure textured film for automotive interiors is provided, comprising the following steps: Pretreatment of the high-transmittance polymer substrate layer; A first printing ink layer is formed on the high-transmittance polymer substrate layer; The micro-nano structure on the release film is transferred to the first printed ink layer and cured to form a micro-nano structure layer by UV transfer printing process, wherein the UV transfer speed is 4 to 6 m / min and the UV irradiation energy is 800 to 1000 mJ / cm². A PVD electroplated layer with light transmittance and conductivity is formed on the micro / nano structure layer using a PVD process, wherein the PVD electroplating temperature is 150–200 °C and the vacuum degree is 1 × 10⁻⁶. -3 Pa; A second printed ink layer is formed on the PVD electroplated layer as a compensation layer; A varnish layer is formed on the second printing ink layer; Adhesive is applied to the surface of the varnish layer. The roller pressing pressure for adhesive application is 0.2 to 0.3 MPa, and the roller drive speed is 14 to 16 m / min, in order to form an adhesive layer. The resulting film is cut and inspected.

[0015] According to a third aspect of the present invention, an automotive interior component is further provided, comprising an automotive interior substrate and a light-transmitting micro-nano structure texture film attached to the surface of the automotive interior substrate, wherein the light-transmitting micro-nano structure texture film is the aforementioned light-transmitting micro-nano structure texture film; wherein the automotive interior substrate is any one of a center console panel, door trim panel, dashboard, or armrest box. The present invention, by employing the above technical solution, has at least the following beneficial effects: 1. Excellent decorative and light transmission performance: Through micro-nano structure UV transfer printing process, exquisite textures are replicated. Combined with double-layer ink color calibration, color deviation is precisely controlled, while maintaining a stable transmittance of 8.5%±1.5%, which is suitable for the light transmission display needs of automotive interiors. 2. Stable and durable structure: Each layer is tightly bonded using a composite process, with an adhesion test result of ≥4B, eliminating the risk of delamination and peeling. The varnish layer provides effective protection, is scratch-resistant and anti-aging, and has a service life of more than 8 years. 3. Environmental protection and safety standards are met: Environmentally friendly inks, water-based adhesives and varnishes are selected, and the incoming material inspection strictly controls harmful substances, which meets the environmental protection standards for automotive interiors. The conductivity is >1000MΩ to avoid static electricity accumulation and ensure safe use. 4. Flexible and efficient manufacturing process: It provides two composite process routes, with precise and controllable core parameters, high production efficiency, suitable for large-scale mass production, and the molds can be reused, reducing production costs; 5. Wide adaptability: The texture design and size specifications can be adjusted according to the needs of different parts of the car interior (center console, door panels, etc.), making it highly compatible. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the translucent micro / nano textured film described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the micro / nano structure texture described in an embodiment of the present invention; Figure 3 This is a flowchart illustrating the preparation of a transparent micro / nano structure textured film hot stamping composite according to an embodiment of the present invention; Figure 4 This is a flowchart illustrating the preparation of a transparent micro / nano structure textured film coating composite according to an embodiment of the present invention. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0019] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0020] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] According to one embodiment of the present invention, such as Figure 1This invention provides a translucent micro / nano-structure textured film for automotive interiors, comprising, from bottom to top, a high-transmittance polymer substrate layer, a first printing ink layer, a micro / nano-structure layer, a PVD electroplated layer with light transmittance and conductivity, a second printing ink layer, a varnish layer, and an adhesive layer. By introducing a translucent and conductive PVD electroplated layer onto the micro / nano-structure layer, the film achieves its conductivity and antistatic requirements. Simultaneously, the second printing ink layer, disposed on the surface of the PVD electroplated layer, acts as a compensation layer to correct color deviations after the introduction of the PVD electroplated layer, ensuring the film maintains a uniform and stable appearance color while meeting the requirements for translucent display or decorative purposes. The varnish layer provides wear resistance, scratch resistance, and anti-aging protection, and the adhesive layer ensures reliable adhesion to the surface of the automotive interior substrate, thus achieving a synergistic effect of decorative texture, light transmittance, conductivity, antistatic properties, and durability.

[0024] In specific designs, the high-transmittance polymer substrate layer can be either a polycarbonate substrate layer or a polymethyl methacrylate (PMMA) substrate layer. When using a polycarbonate substrate layer, its thickness can be controlled between 50 and 80 μm with a transmittance ≥80% to balance film strength, formability, and light transmission. When using a PMMA substrate layer, its thickness can be controlled between 40 and 70 μm with a transmittance ≥78% to achieve better light transmission and appearance and meet the requirements for interior trim applications. By selecting and matching the substrate layer material and thickness window, stable base conditions can be provided for subsequent printing, UV transfer printing, and PVD electroplating, reducing appearance fluctuations caused by substrate haze, warpage, or surface condition differences.

[0025] In a preferred embodiment, the first printed ink layer provides a base color enhancement and visual transition, while the second printed ink layer compensates for and corrects color deviations introduced by the PVD electroplating layer, resulting in a more uniform and consistent overall color of the film. Preferably, the first printed ink layer has a thickness of 2–3 μm, and the second printed ink layer has a thickness of 1–2 μm, both being environmentally friendly inks to balance color performance, adhesion reliability, and environmental requirements. By placing the compensation layer on the surface of the PVD electroplating layer, the reflection and color shift variations caused by the electroplating layer can be corrected, making it easier to maintain stable and consistent appearance of the final film in light-transmitting display scenarios.

[0026] In practical implementation, the micro / nano structure layer is formed by transferring and curing a release film through a UV transfer process, thereby creating a micro / nano structure texture on the film surface (such as...). Figure 2Preferably, the micro / nano structure layer is formed by grayscale image replication. The micro / nano structure size accuracy can be 100–500 nm, and the thickness of the micro / nano structure layer can be 3–5 μm. The micro / nano structure texture can be one or more of three-dimensional wavy texture, dot array texture, and biomimetic texture. By replicating the grayscale image and combining it with UV transfer printing, a delicate and stable micro / nano texture effect can be obtained on the film surface, improving the decorative texture and tactile performance, and providing a functional surface morphology basis for the subsequent PVD electroplating layer.

[0027] In a preferred embodiment, a PVD electroplating layer is deposited on the surface of the micro / nano structure layer. The PVD electroplating layer possesses both light transmittance and conductivity, enabling the film to achieve conductive and antistatic effects. Preferably, the PVD electroplating layer material can be an indium tin alloy or a zinc-aluminum alloy, and the PVD electroplating layer thickness can be controlled between 0.1 and 0.3 μm to achieve a balance between light transmittance and conductivity. Furthermore, the PVD electroplating layer meets antistatic requirements, achieving a film resistance value >1000 MΩ, thereby reducing the risk of dust accumulation, dirt buildup, and localized appearance defects caused by static electricity buildup during automotive interior use, and improving long-term appearance stability.

[0028] In practice, a varnish layer is applied to the surface of the second printed ink layer to provide abrasion-resistant, scratch-resistant, and anti-aging protection for the film surface. Preferably, the varnish layer is water-based, with a total thickness of 7±2 μm, and is formed by two coatings. This two-stage film formation improves surface density and uniformity, enhances abrasion and scratch resistance, and also improves resistance to environmental factors. In conjunction with this, an adhesive layer is applied to the surface of the varnish layer, preferably a water-based environmentally friendly adhesive layer with a thickness of 3–5 μm that leaves no residue after peeling. This facilitates reliable adhesion of the film to automotive interior substrates and reduces the risk of residue contamination during re-application or removal. This combination of the varnish and adhesive layers achieves both adhesion functionality and improved surface protection and long-term durability.

[0029] The preparation method of the film of the present invention will be described below with reference to two preparation process routes. The two processes are consistent in the key steps of micro-nano structure forming and PVD electroplating. The difference lies in the lamination method, which adopts hot stamping lamination or adhesive coating lamination respectively, to adapt to different manufacturing organization methods and process equipment conditions.

[0030] In specific implementations, such as Figure 3 The preparation method of the hot stamping composite route includes the following steps: First, the high-transmittance polymer substrate layer is pretreated to remove surface contaminants and improve the adhesion stability of subsequent inks and functional layers. Subsequently, a first printing ink layer is formed on the substrate layer; Next, the micro-nano structure on the release film is transferred to the first printing ink layer and cured to form a micro-nano structure layer by UV transfer printing process. Preferably, the UV transfer speed is controlled at 4 to 6 m / min and the UV irradiation energy is 800 to 1000 mJ / cm² to ensure that the micro-nano structure is fully transferred and formed, the texture is clear and the curing is stable. After forming the micro-nano structure layer, the layer structure is hot-stamped and laminated. The hot-stamping and lamination pressure is preferably 0.25 MPa. This lamination step improves the interlayer adhesion and structural stability. Subsequently, a PVD electroplating layer with light transmittance and conductivity is formed on the micro / nano structure layer using a PVD process. Preferably, the PVD electroplating temperature is controlled at 150–200 °C and the vacuum degree is 1 × 10⁻⁶. -3 Pa, to obtain stable film formation while taking into account both light transmittance and conductivity requirements; After electroplating is completed, a second printing ink layer is formed on the PVD electroplated layer as a compensation layer to correct the color deviation introduced by the electroplated layer. Then, a clear coat layer is formed on the compensation layer, and an adhesive layer is formed thereafter. Finally, the obtained film is cut and inspected to obtain a finished film that meets the requirements of decoration, light transmission, conductivity, antistatic properties, and durability.

[0031] In specific implementations, such as Figure 4 The preparation method of the adhesive-coated composite route also includes steps such as substrate pretreatment, formation of the first printing ink layer, UV transfer to form a micro / nano structure layer, and PVD electroplating to form a conductive and transparent layer. The preferred UV transfer speed is 4–6 m / min, the preferred UV irradiation energy is 800–1000 mJ / cm², the preferred PVD electroplating temperature is 150–200℃, and the preferred vacuum degree is 1×10⁻⁶ mJ / cm². -3 Pa is used to ensure the stability of key effects in micro-nano texture formation and conductive layer film formation. A second printing ink layer is then formed on the PVD electroplated layer as a compensation layer, followed by a varnish layer. Unlike hot stamping lamination, an adhesive layer is applied to the surface of the varnish layer to form an adhesive layer. The roller lamination pressure is preferably controlled at 0.2–0.3 MPa, and the roller speed at 14–16 m / min to ensure uniform adhesive coating and lamination, avoid air bubble entrainment, and improve adhesion stability. Afterwards, cutting and inspection are performed to obtain the finished film.

[0032] To ensure the overall performance of the film in automotive interior applications, comprehensive testing of light transmittance, appearance uniformity, interlayer adhesion, and electrostatic discharge (ESD) indicators can be conducted during the inspection phase (key process parameter controls are shown in Table 1). This ensures stable color deviation correction achieved through the compensation layer, stable abrasion resistance achieved through the varnish layer, and stable conductive ESD protection achieved through the PVD electroplating layer. Through the aforementioned structural layering design and process parameter window control of the two preparation routes, the film of this invention can balance decorative texture, light transmittance, conductivity, ESD protection, and durability in applications applied to automotive interior components, improving interior appearance consistency and long-term stability.

[0033]

[0034]

[0035] To better understand and apply the above solution and to effectively demonstrate its corresponding benefits, the following detailed description of the present invention is provided in conjunction with specific embodiments.

[0036] Example 1: Translucent micro-nano structure textured film for central control panel (Route 1: Hot stamping lamination) Substrate selection: 60μm thick PC substrate, with an incoming material inspection transmittance of 83% and passing the hazardous substance test; First printing: Mass production ink is printed using screen printing technology, with a thickness of 2.5μm, and then air-dried. UV transfer: A master mold made with a 3D wavy texture grayscale image was used. The transfer speed was 5.0 m / min, and the UV irradiation energy was 900 mJ / cm², forming a 4 μm thick micro-nano structure layer. The transmittance after transfer was 7.9%. Hot stamping lamination: Hot stamping lamination is performed with a pressure of 0.25MPa to ensure tight adhesion between layers; PVD plating: vacuum degree 1×10 -3 Pa, temperature 180℃, indium tin film thickness 0.2μm, conductivity measured as 1200MΩ; Second printing: Printing a compensation ink layer, 1.5μm thick, with color Lab values ​​of L: 42.4, a: -0.1, b: -2.6; Varnish coating: Apply water-based varnish in two layers. The first layer is 3μm thick and is dried at 60℃ for 10 minutes. The second layer is 4μm thick and is dried at 80℃ for 15 minutes. The total film thickness is 7μm. Adhesive layer coating: Apply a 4μm thick layer of water-based environmentally friendly adhesive; Cutting and Inspection: Cut to 20cm×15cm size and inspect various properties: adhesion 5B, transmittance 8.3%, color deviation Δx=-0.008, Δy=0.006, appearance free of bubbles and scratches, meeting the requirements.

[0037] Example 2: Translucent micro-nano structure textured film for door trim panels (Route 2: Adhesive coating and lamination) Substrate selection: 70μm thick PC substrate with an incoming material inspection transmittance of 82%; First printing to varnish coating: The steps are the same as in Example 1. The micro-nano structure uses a dot array texture, the transfer speed is 4.5m / min, and the conductivity after PVD electroplating is 1100MΩ. Adhesive coating and lamination: A 3μm thick layer of adhesive is coated on the release PET surface and then rolled and laminated with the composite layer at a roller speed of 15m / min and a pressure of 0.2MPa. Cutting and inspection: Cut to a size of 30cm×20cm. Inspection results: Adhesion 4B, transmittance 8.1%, color deviation Δx=-0.009, Δy=0.007, all performances meet the standards.

[0038] Example 3: Translucent Micro-Nano Structure Textured Film for Instrument Panels The difference from Example 1 is that the micro-nano structure is a biomimetic texture, the total thickness of the varnish layer is 5μm, the total thickness of the process is 12μm, the transmittance of the finished product is 7.6%, and the color Lab value is L: 42.1, a: -1.9, b: -5.4. All other properties meet the technical requirements.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention, including the best mode, and also to enable any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combined method. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A translucent micro / nano-structured textured film for automotive interiors, characterized in that, The light-transmitting micro-nano structure textured film comprises, from bottom to top: a high-transmittance polymer substrate layer, a first printing ink layer, a micro-nano structure layer, a PVD electroplating layer with light transmittance and conductivity, a second printing ink layer, a varnish layer, and an adhesive layer. The micro-nano structure layer is formed by transferring and curing a release film through a UV transfer process to create a micro-nano structure texture on the film surface. The PVD electroplating layer is disposed on the surface of the micro / nano structure layer; The second printing ink layer is disposed on the surface of the PVD electroplated layer and serves as a compensation layer to correct the color deviation introduced by the PVD electroplated layer; The varnish layer is used to provide wear-resistant, scratch-resistant and anti-aging protection to the surface of the film; The adhesive layer is used to attach the film to the surface of the automotive interior substrate.

2. The translucent micro / nano structure textured film according to claim 1, characterized in that, The high-transmittance polymer substrate layer is a polycarbonate substrate layer or a polymethyl methacrylate substrate layer. The polycarbonate substrate layer has a thickness of 50–80 μm and a transmittance of ≥80%, while the polymethyl methacrylate substrate layer has a thickness of 40–70 μm and a transmittance of ≥78%.

3. The translucent micro / nano textured film according to claim 1, characterized in that, The micro / nano structure layer includes one or more of the following: The micro / nano structure layer is formed by replicating a grayscale image; The micro-nano structure layer has a micro-nano structure size accuracy of 100–500 nm; The thickness of the micro / nano structure layer is 3–5 μm; The texture type of the micro / nano structure texture is selected from one or more of the following: three-dimensional ripple texture, dot array texture, and biomimetic texture.

4. The translucent micro / nano textured film according to claim 1, characterized in that, The PVD electroplated layer includes one or more of the following: The material of the PVD electroplated layer is an indium tin alloy; The material of the PVD electroplated layer is a zinc-aluminum alloy; The thickness of the PVD electroplated layer is 0.1–0.3 μm; The PVD electroplated layer meets the antistatic requirements and has a resistance value >1000 MΩ.

5. The translucent micro / nano structure textured film according to claim 1, characterized in that, The thickness of the first printing ink layer is 2 to 3 μm, the thickness of the second printing ink layer is 1 to 2 μm, and both the first printing ink layer and the second printing ink layer are environmentally friendly inks.

6. The translucent micro / nano structure textured film according to claim 1, characterized in that, The varnish layer is a water-based varnish layer, and the total thickness of the varnish layer is 7±2 μm, which is formed by two coatings.

7. The translucent micro / nano structure textured film according to claim 1, characterized in that, The adhesive layer is a water-based environmentally friendly adhesive layer with a thickness of 3 to 5 μm and leaves no adhesive residue after peeling.

8. A method for preparing a translucent micro / nano-structured textured film for automotive interiors, characterized in that, Includes the following steps: Pretreatment of the high-transmittance polymer substrate layer; A first printing ink layer is formed on the high-transmittance polymer substrate layer; The micro-nano structure on the release film is transferred to the first printed ink layer and cured to form a micro-nano structure layer by UV transfer printing process, wherein the UV transfer speed is 4 to 6 m / min and the UV irradiation energy is 800 to 1000 mJ / cm². The layer structure after the formation of the micro-nano structure layer is hot-stamped and laminated, with a hot-stamping lamination pressure of 0.25 MPa; A PVD electroplated layer with light transmittance and conductivity is formed on the micro / nano structure layer using a PVD process, wherein the PVD electroplating temperature is 150–200 °C and the vacuum degree is 1 × 10⁻⁶. -3 Pa; A second printed ink layer is formed on the PVD electroplated layer as a compensation layer; A varnish layer is formed on the second printing ink layer; An adhesive layer is formed on the varnish layer; The resulting film is cut and inspected.

9. A method for preparing a translucent micro / nano-structured textured film for automotive interiors, characterized in that, Includes the following steps: Pretreatment of the high-transmittance polymer substrate layer; A first printing ink layer is formed on the high-transmittance polymer substrate layer; The micro-nano structure on the release film is transferred to the first printed ink layer and cured to form a micro-nano structure layer by UV transfer printing process, wherein the UV transfer speed is 4 to 6 m / min and the UV irradiation energy is 800 to 1000 mJ / cm². A PVD electroplated layer with light transmittance and conductivity is formed on the micro / nano structure layer using a PVD process, wherein the PVD electroplating temperature is 150–200 °C and the vacuum degree is 1 × 10⁻⁶. -3 Pa; A second printed ink layer is formed on the PVD electroplated layer as a compensation layer; A varnish layer is formed on the second printing ink layer; Adhesive is applied to the surface of the varnish layer. The roller pressing pressure for adhesive application is 0.2 to 0.3 MPa, and the roller drive speed is 14 to 16 m / min, in order to form an adhesive layer. The resulting film is cut and inspected.

10. An automotive interior component, characterized in that, The invention includes an automotive interior substrate and a light-transmitting micro-nano structure textured film attached to the surface of the automotive interior substrate, wherein the light-transmitting micro-nano structure textured film is the light-transmitting micro-nano structure textured film according to any one of claims 1 to 7; wherein the automotive interior substrate is any one of a center console panel, door trim panel, dashboard, or armrest box.

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