Texture film, electronic equipment and texture film preparation method

Abstract

The invention relates to a texture film, electronic equipment and a texture film preparation method. The texture film comprises a base layer film structure and a plurality of composite texture structures, the composite texture structures are arranged on the same side of the base layer film structure, and the composite texture structures are independently arranged to form a hydrophobic structure. The composite texture structure with the hydrophobic function is arranged on one side of the base layer film structure, sweat or dirt remaining on the texture film can be reduced through the composite texture structure, and the texture film has the good antifouling performance.

Description

Technical Field

[0001] The present application relates to the technical field of plastic film layers, and in particular to a texture film, an electronic device and a method for preparing the texture film. Background Art

[0002] With the improvement of living standards, various electronic equipment and household appliances industries have higher and higher requirements for product aesthetics, and need to design the appearance of products to bring better visual experience to users. In addition to adjusting the structure of the product, the gloss of the product surface can also be improved by covering the outer surface of the product with a film, such as covering the outer surface of the product with a smooth plastic film to improve the aesthetics. However, although the smooth plastic surface is easy to clean, it is very easy to be stained with fingerprints and other dirt in daily use, affecting the appearance and user experience of the product.

[0003] At present, a layer of antifouling coating is usually sprayed on the surface of the film to reduce the dirt residue on the film. However, although the antifouling coating can play a certain protective effect, it is easy to lose the antifouling effect as it wears out over time. In addition, the setting of the coating also has the defects of high cost and low environmental protection. Therefore, how to improve the antifouling performance of the film surface and reduce fingerprint residue is an urgent problem to be solved. Summary of the invention

[0004] Based on this, it is necessary to provide a texture film, electronic device, texture film preparation method, device, computer equipment, computer-readable storage medium and computer program product that can improve the anti-fouling performance in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a textured film, the textured film comprising:

[0006] Base membrane structure;

[0007] A plurality of composite texture structures, each of which is arranged on the same side of the base membrane structure, and each of which is arranged independently of each other to form a hydrophobic structure.

[0008] In one of the embodiments, the texture film further comprises a composite texture group, the composite texture group comprises a preset number of the composite texture structures, and the number of the composite texture groups is multiple;

[0009] On the base film structure, each of the composite texture groups is arranged at a first distance; each of the composite texture structures in the composite texture group is arranged at a second distance; and the first distance is greater than the second distance.

[0010] In one embodiment, the geometric center area of ​​the base membrane structure is taken as the center of the circle, and each of the composite texture structures is arranged on the circumference of a concentric circle of the center of the circle.

[0011] In one embodiment, the composite texture structure is one or more of an inverted cone structure, a microsphere structure, and a wavy structure.

[0012] In one of the embodiments, when the composite texture structure is an inverted cone structure and / or a micro-spherical structure, the texture film further comprises an overlay structure, and the overlay structure is arranged on a side of the inverted cone structure and / or the micro-spherical structure away from the base film structure.

[0013] In one of the embodiments, when the composite texture structure is an inverted cone structure, the superimposed structure includes a columnar structure, a trapezoidal structure and a hemispherical structure.

[0014] In one embodiment, when the composite texture structure is a micro-spherical structure, the superimposed structure is a hemispherical structure.

[0015] In a second aspect, the present application also provides an electronic device, comprising an electronic device and a texture film as described in the above embodiment, wherein the texture film is arranged on the outer surface of the electronic device, the base film structure of the texture film is arranged in contact with the electronic device, and the composite texture structure of the texture film is arranged on a side of the base film structure away from the electronic device.

[0016] In a third aspect, the present application further provides a method for preparing a texture film, which is used to prepare the texture film as described in the above embodiment, and the method comprises:

[0017] Providing a model substrate;

[0018] Based on the selected composite texture structure, an inverse composite texture structure is engraved on the model substrate to obtain a texture mold; the inverse composite texture structure is interlocked with the composite texture structure;

[0019] A polymer material is injected onto the texture mold to form a texture film.

[0020] In one embodiment, engraving the inverse composite texture structure on the model substrate includes:

[0021] In the case where the selected composite texture structure is an inverted cone structure, engraving the inverted composite texture structure on the model substrate in a layer-by-layer engraving method;

[0022] In the case where the selected composite texture structure is a micro-spherical structure, engraving the inverse composite texture structure on the model substrate by laser dot engraving;

[0023] In the case where the selected composite texture structure is a wavy structure, the reverse composite texture structure is engraved on the model substrate in a continuous scanning and layer-by-layer engraving manner.

[0024] In a fourth aspect, the present application also provides a texture film preparation device, comprising:

[0025] A substrate module, used for providing a model substrate;

[0026] A processing module is used to engrave a reverse composite texture structure on the model substrate based on the selected composite texture structure to obtain a texture mold; the reverse composite texture structure and the composite texture structure are interlocked;

[0027] The preparation module is used for injecting polymer material onto the texture mold to form a texture film.

[0028] In a fifth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0029] Providing a model substrate;

[0030] Based on the selected composite texture structure, an inverse composite texture structure is engraved on the model substrate to obtain a texture mold; the inverse composite texture structure is interlocked with the composite texture structure;

[0031] A polymer material is injected onto the texture mold to form a texture film.

[0032] In a sixth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0033] Providing a model substrate;

[0034] Based on the selected composite texture structure, an inverse composite texture structure is engraved on the model substrate to obtain a texture mold; the inverse composite texture structure is interlocked with the composite texture structure;

[0035] A polymer material is injected onto the texture mold to form a texture film.

[0036] In a seventh aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0037] Providing a model substrate;

[0038] Based on the selected composite texture structure, an inverse composite texture structure is engraved on the model substrate to obtain a texture mold; the inverse composite texture structure is interlocked with the composite texture structure;

[0039] A polymer material is injected onto the texture mold to form a texture film.

[0040] The texture film, electronic device, texture film preparation method, device, computer device, computer readable storage medium and computer program product, the texture film includes a base film structure and a plurality of composite texture structures, each composite texture structure is arranged on the same side of the base film structure, and each composite texture structure is arranged independently of each other to form a hydrophobic structure. By arranging a composite texture structure with a hydrophobic function on one side of the base film structure, the composite texture structure can reduce the sweat or dirt remaining on the texture film, so that the texture film has better anti-fouling performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 is a schematic diagram of the structure of a textured film in one embodiment;

[0043] Figure 2 A schematic cross-sectional view of a sampling length of a textured film in one embodiment;

[0044] Figure 3 A schematic diagram of counting peak values ​​of a texture film in one embodiment;

[0045] Figure 4 is a schematic structural diagram of a textured film in another embodiment;

[0046] Figure 5 is a schematic structural diagram of a textured film in yet another embodiment;

[0047] Figure 6 A schematic diagram of the structure of a textured film in yet another embodiment;

[0048] Figure 7 A schematic diagram of the structure of a textured film in another embodiment;

[0049] Figure 8 A schematic diagram of the structure of a textured film in another embodiment;

[0050] Fig. 9A diagram showing an application environment of a texture film preparation method in one embodiment;

[0051] Fig.10 A schematic flow chart of the steps of engraving a reverse composite texture structure on a model substrate in one embodiment;

[0052] Fig.11 is a structural block diagram of a texture film preparation device in one embodiment;

[0053] Fig.12 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0056] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0057] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0059] After a person's finger contacts an object, sebum, sweat and other dirt remain on the surface of the material, forming a fingerprint-like dirt mark, which is called a fingerprint. The main component of a fingerprint is sebum (triglycerides, phospholipids, free fatty acids, etc.), which is rich in fatty substances with low surface tension. The size of the surface deposit is related to the contact area, while fingerprints rich in sebum will produce a continuous film, and deposits rich in sweat appear in the form of droplets. Due to the high surface energy of plastics (usually above 40dyn / cm), sebum is easy to spread and form a grease film, making the fingerprint more obvious.

[0060] Therefore, in order to reduce the residual fingerprints, the present application provides a texture film, which is made of plastic material, has good anti-fouling performance, and can reduce sebum residue. Figure 1 As shown, the texture membrane includes a base membrane structure 1 and a plurality of composite texture structures 2. Each composite texture structure 2 is arranged on the same side of the base membrane structure 1, and each composite texture structure 2 is arranged independently of each other to form a hydrophobic structure.

[0061] Among them, the hydrophobic structure is a structure that can reflect hydrophobicity. Hydrophobicity refers to the physical property of a molecule and water repelling each other at the molecular level. On the basis of the material being plastic, it can be a plastic with a longer carbon-containing molecular chain, or a hydrophobic side chain (methyl or chlorine atom), which exhibits a lower surface energy than water, thereby achieving hydrophobicity; it can also be achieved by setting a structure on the surface of the plastic so that the plastic surface presents a super-hydrophobic surface to achieve a hydrophobic effect. A super-hydrophobic surface generally refers to a surface with a contact angle with a surface droplet greater than 150°. In this embodiment, the composite texture structure 2 that can form a super-hydrophobic surface can be regarded as forming a hydrophobic structure.

[0062] The base film structure 1 can be a film of unlimited thickness, and the specific thickness value can be selected according to the needs, and the thickness of different areas can be different to adapt to different use environments. Optionally, the material of the base film structure 1 is a plastic made of a polymer material, or it can be a material with low surface energy, such as modified polypropylene (PP) and polyethylene (PE), to enhance super-hydrophobic properties and reduce surface wettability. ABS or PC materials can also be selected. The smaller the surface energy, the larger the contact angle, the smaller the intermolecular force, and the better the hydrophobicity. Surface energy can be understood as a kind of interaction force between solids and liquids. If the surface energy of the material is low, the interaction force between the solid and the liquid is weak, and it is difficult for the liquid to stay and spread on the solid surface. Water molecules can easily slide away from the surface of the material, reducing the accumulation of rainwater. Thereby showing hydrophobicity.

[0063] There are multiple composite texture structures 2, and each composite texture structure 2 is arranged on the same side of the base film structure 1 to form a hydrophobic structure on this side. Specifically, each composite texture structure 2 is independent of each other and is arranged based on the base film structure 1, and there may be a gap between each composite texture structure 2 to ensure the independence of each composite texture structure 2. Since the contact angle of a water droplet on the surface increases as the contact area between the solid and the liquid decreases, the surface roughness of the texture film can be increased by arranging multiple composite texture structures 2, and the concavity and convexity of the texture film can be increased, so that multiple composite texture structures 2 can form a hydrophobic structure and show hydrophobicity when contacting fingerprints.

[0064] For example, the physical characteristics of the rough surface formed by the composite texture structure 2 and the base membrane structure 1 can satisfy the following parameters:

[0065] Taking the cross section of a rough surface under a sampling length l as an example, the parameters related to the surface roughness are Ra and Rp. The parameter Ra represents the arithmetic mean height, which represents the arithmetic mean of the absolute value of the ordinate Z (x) within a sampling length. The calculation formula is:

[0066]

[0067] The parameter Rq represents the root mean square height, which represents the root mean square value of Z (x) within a sampling length l. The calculation formula is:

[0068]

[0069] The heights of the arithmetic mean and the arithmetic root mean square, that is, the values ​​of Ra and Rp, are controlled between 0.5 μm and 5.0 μm to form an effective microstructure.

[0070] The parameters related to texture height are Rz and Rt. Parameter Rz represents the maximum height, which represents the sum of the maximum profile peak height and the maximum profile valley depth Zv within a sampling length. The calculation formula is Rz=Rp+Rv. Parameter Rt represents the total height, which represents the sum of the maximum profile peak height Zp and the maximum profile valley depth Zv within the evaluation length (non-sampling length). Rt=max(Zpi)+max(Zvi).

[0071] Among them, Rp represents the maximum profile peak height, which represents the maximum profile peak height within a sampling length, that is, the highest surface position within the sampling length; parameter Rv represents the maximum profile valley depth, which represents the maximum profile valley depth within a sampling length, that is, the lowest surface position within the sampling length. Figure 2 As shown, the multiple contour peak heights are Zp1, Zp2, Zp3...Zpi, Rp=max(Z(x)); the multiple contour valley depths are Zv1, Zv2, Zv3...Zvi, Rv=min(Z(x)).

[0072] Controlling the texture height between 10μm and 50μm, ensuring sufficient peak height (Rp) and valley depth (Rv) microstructure, increasing the contact angle and reducing oil adhesion, can effectively reduce the fingerprint adhesion rate to achieve a superhydrophobic effect.

[0073] The texture spacing parameters include the parameter RSm, which represents the average length of the contour curve, representing the average value of the width Xs of the contour unit within a sampling length. That is, based on the average line, the distance between the intersection points of each concave and convex is recorded as Xs1, Sx2, Xs3...Xsm, respectively, and the calculation formula is:

[0074]

[0075] The texture spacing parameters also include texture density RPc. The parameter RPc represents the peak count, which characterizes the number of profile peaks over the entire evaluation length. The counting method can be as follows: Figure 3 As shown, with the average line as the benchmark, each texture that exceeds the positive average line and is lower than the negative average line is regarded as a peak and counted.

[0076] The average length (Rsm) of the profile curve is controlled between 100 μm and 350 μm, and the peak count (Rpc) is 15 to 30 to ensure that the surface has uniform density and plays a good air bridge effect.

[0077] It should be noted that the above parameter indicators can be interpreted based on national standards, ISO, JIS and other standards, and will not be described in detail in this application.

[0078] In this embodiment, the texture film includes a base film structure 1 and a plurality of composite texture structures 2, each of which is arranged on the same side of the base film structure 1, and each of the composite texture structures 2 is arranged independently of each other to form a hydrophobic structure. By arranging the composite texture structure 2 with a hydrophobic function on one side of the base film structure 1, the composite texture structure 2 can reduce the sweat or dirt remaining on the texture film, so that the texture film has better anti-fouling performance.

[0079] In one embodiment, the composite texture structure 2 is one or more of an inverted cone structure, a microsphere structure, and a wavy structure.

[0080] Among them, the inverted cone structure can also be an inverted trapezoidal structure, that is, the cross-section of the end close to the base membrane structure 1 is smaller, and the cross-section of the end away from the base membrane structure 1 is larger, and the cross-section of the end away from the base membrane structure 1 can be parallel to the surface of the base membrane structure 1. The side connected to the base membrane structure 1 can be a plurality of quadrilaterals, that is, the cross-section of the inverted cone is a quadrilateral, and the cone is a square cone; the side connected to the base membrane structure 1 can also be a quadrilateral, that is, the cross-section of the inverted cone is a circle, and the cone is a cone. It can increase the roughness of the surface, reduce the liquid contact area through a sharper bottom and a wider top, form a high contact angle, and improve the superhydrophobic performance through the bionic lotus leaf effect.

[0081] The micro-spherical structure is a spherical protrusion structure, which can be a spherical, elliptical or various approximately spherical structural protrusions. Furthermore, the micro-spherical structure can also include a connector connecting the spherical protrusion and the base membrane structure 1, that is, the spherical protrusion structure is arranged on the base membrane structure 1 through the connector. A bubble layer is formed between each micro-spherical structure, which reduces the contact area between the water droplet and the surface, and can achieve a super-hydrophobic effect by imitating insect wings.

[0082] The wavy structure is an overlapping wavy or fish-scale structure, which makes the surface of the textured film appear undulating, which can reduce the contact area between water droplets and the surface, improve the sliding of water droplets, and reduce the stickiness of stains by mimicking fish scales.

[0083] The three structures can be arranged in combination or one of them can be arranged selectively, that is, the composite texture structure 2 in the texture film can be any one or more of the inverted cone structure, the microsphere structure and the wavy structure.

[0084] Furthermore, in one of the embodiments, when the composite texture structure 2 is an inverted cone structure and / or a micro-spherical structure, the texture film also includes an overlay structure, which is arranged on a side of the inverted cone structure and / or the micro-spherical structure away from the base film structure 1.

[0085] The superimposed structure is arranged on the side away from the base membrane structure 1, and can further increase the hydrophobicity on the basis of the original structure when the user touches it. When the composite texture structure 2 is a wavy structure, since the surface undulations of the wavy structure are connected to each other, that is, the spacing distance is very small, there is no need to arrange a superimposed structure on the side of the wavy structure away from the base membrane structure 1, and a better hydrophobic effect can be achieved.

[0086] In one embodiment, when the composite texture structure 2 is an inverted cone structure, the superimposed structure includes a columnar structure, a trapezoidal structure and a hemispherical structure. Figure 4As shown, when the stacked structure 3 is a columnar structure, the columnar structure may include a cylindrical structure and a square columnar structure. The cylindrical structure is a cylinder, and the square columnar structure may be a cube or a cuboid. Furthermore, the columnar structure may be convex on the side away from the composite texture structure 2, and the convexity may be a cone and / or a pyramid. Figure 5 As shown, when the stacked structure 3 is a trapezoidal structure, the long side of the trapezoid is close to the inverted cone structure, and the short side of the trapezoid is far away from the inverted cone structure. Figure 6 As shown, when the superimposed structure 3 is a hemispherical structure, the straight surface of the hemispherical structure is close to the inverted cone structure. Figure 7 As shown, when the composite texture structure 2 is a micro-spherical structure, the superimposed structure 3 is a hemispherical structure.

[0087] It should be noted that the shape of the superimposed structure 3 in the above embodiment is not limited to the several shapes in the above embodiment, and can be designed into other shapes as long as the hydrophobic performance of the composite texture structure 2 can be improved.

[0088] In this embodiment, when the composite texture structure 2 is a different structure, a superimposed structure 3 may be correspondingly provided to further enhance the hydrophobicity of the composite texture structure 2 so as to improve the anti-fouling performance of the texture film.

[0089] In one embodiment, if Figure 8 As shown, the texture film further includes a composite texture group 20, the composite texture group 20 includes a preset number of composite texture structures 2, and the number of the composite texture group 20 is multiple. Figure 8 In the embodiment, the composite texture group 20 includes two composite texture structures 2. On the base film structure 1, each composite texture group 20 is arranged at a first distance, and each composite texture structure 2 in the composite texture group 20 is arranged at a second distance. The first distance is greater than the second distance. That is, the distance between the composite texture structures 2 in the same composite texture group 20 is closer, and the distances between different composite texture groups 20 may be inconsistent or the same.

[0090] For example, the composite texture structures 2 are grouped in pairs to form composite texture groups 20, and the composite texture groups 20 are evenly distributed: the structures are grouped in pairs, and the distance between the composite texture structures 2 in each group remains consistent, but the distance between groups can be different. For example, the distance between the two inverted cone structures in each group is 2 mm, and the distance between groups is 4 mm.

[0091] Optionally, the composite texture structure 2 may be arranged in the form of a composite texture group 20, or in other ways. In one embodiment, the composite texture structure 2 may be distributed in a gradient manner, with the geometric center area of ​​the base film structure 1 as the center, and the density of the composite texture structure 2 gradually increases or decreases from the center to the edge, forming a gradient distribution pattern. For example, the density of the composite texture structure 2 in the center area is higher, gradually decreases outward, and the density in the edge area is the lowest.

[0092] In one embodiment, the composite texture structure 2 can be distributed in concentric circles, with the geometric center area of ​​the base film structure 1 as the center of the circle, and each composite texture structure 2 is arranged on the circumference of the concentric circle of the center of the circle, and the radius of each concentric circle is arranged in an arithmetic progression. The composite texture structure 2 is distributed in the form of concentric circles to form a clearly layered arrangement pattern. Starting from the center point, it expands outward along multiple concentric circles. The radius of each concentric circle can be arranged according to a certain rule, or it can be arranged with a random radius, wherein the number and spacing of the composite texture structures 2 on each circle can be different.

[0093] In one embodiment, the composite texture structure 2 may be arranged in a grid pattern, arranged diagonally and crosswise at equal distances to form a regular grid structure, or arranged at fixed intervals in the horizontal and vertical directions to form a rectangular or square grid.

[0094] In one embodiment, the composite texture structure 2 may be randomly distributed. The composite texture structure 2 is randomly distributed on the base film structure 1, without following a fixed interval or pattern. A random algorithm may be used to randomly place the composite texture structure 2 in a specified area to ensure that the overall distribution of the texture film is uniform but irregular.

[0095] In this embodiment, by setting different arrangements for the composite texture structure 2, it can be applied to different application scenarios, forming different hydrophobic structures, thereby expanding the applicability and reliability of the texture film.

[0096] Furthermore, the present application also provides an electronic device, which includes an electronic device and a texture film as described in the above embodiment, wherein the texture film is arranged on the outer surface of the electronic device, the base film structure 1 of the texture film is arranged in contact with the electronic device, and the composite texture structure 2 of the texture film is arranged on the side of the base film structure 1 away from the electronic device.

[0097] The electronic device can be any product that needs to be coated, and is not limited to products that need to be driven by electrical energy. The outer surface of the electronic device is covered with a texture film, and the side provided with the composite texture structure 2 faces outward, which can reduce the residual fingerprint when the user touches and interacts with the electronic device. For example, the electronic device can be different types of household appliances, such as dishwashers, water purifiers, refrigerators, air conditioners, air purifiers, stoves, range hoods, humidifiers, steam ovens, and other different types of electrical appliances.

[0098] Based on the same technical concept, the present application also provides a method for preparing a textured film, which can be applied to Figure 1 In the application environment shown.

[0099] In an exemplary embodiment, Fig. 9 As shown, a texture film preparation method is provided, which can be implemented based on different processing equipment, including the following steps 202 to 206. Among them:

[0100] Step 202, providing a model substrate.

[0101] Among them, the model substrate can be an unprocessed metal sheet. For example, the material of the model substrate can be S136 pre-hardened steel or alloy steel SKD6 series, which can withstand the high temperature process of laser etching and micro-electroforming, and has high wear resistance. The hardness of the steel can be controlled within HRC 50-60 to ensure that the mold structure does not deform after long-term injection molding, and meet the application of various polymer materials (such as glass fiber materials, etc.). After placing the model substrate in the specified position, the model substrate can be processed. The processing methods include but are not limited to laser etching, micro-electroforming, and nano-imprinting technologies.

[0102] Step 204 , based on the selected composite texture structure, engrave a reverse composite texture structure on the model substrate to obtain a texture mold.

[0103] The inverse composite texture structure and the composite texture structure are interlocked with each other, and the corresponding inverse composite texture structure can be obtained by engraving by inputting a corresponding engraving program on the engraving device.

[0104] After the composite texture structure is selected, the program corresponding to the selected composite texture structure can be called to carve the reverse composite texture structure on the model substrate according to the program. The reverse composite texture structure can be used to generate a texture film during injection molding, and the carved model substrate is a texture mold.

[0105] Engraving methods include but are not limited to laser etching, micro-electroforming, and nano-imprinting. Laser etching is known for its ultra-high precision and is suitable for processing inverted cone structures and micro-spherical structures. The laser beam can perform micron-level engraving on metal molds, and achieve microstructures of different sizes by adjusting the spot diameter, ensuring that the structure fully meets the design parameters in terms of size and depth, and ensuring the high consistency of the inverted cone structure and the micro-spherical structure. Its accuracy can reach ±0.01μm, ensuring that the bottom of the inverted cone is sharp and the top is wide, forming an ideal super-hydrophobic angle.

[0106] Micro-electroforming can achieve high replication on complex microstructures, such as wavy structures. Micro-electroforming technology uses the current on the conductive electrode to generate a metal deposition layer, so that the composite texture structure of the texture mold remains consistent. It is mainly used for the molding of wavy and CD texture structures. By electroforming to form a continuous and regular wavy structure, the surface roughness can be controlled within Ra0.2μm, ensuring that the wavy structure forms clear peaks and troughs.

[0107] Nanoimprinting is aimed at ultra-microstructure and high-precision requirements. It can form tiny spherical structures on the mold surface, and the processing accuracy can reach below 0.05μm, ensuring accuracy and consistency. It is suitable for mass production and can ensure high repeatability of microsphere structures. It is efficient and accurate, and is particularly suitable for large-scale production of microsphere structures.

[0108] Step 206 , injecting a polymer material onto the texture mold to form a texture film.

[0109] After completing the processing of the texture mold, polymer material can be injected into the texture mold. The polymer material is used to generate plastic. The liquid polymer material covers the texture mold to fill the trans-composite texture structure. After waiting for the polymer material to cool and generate plastic, the cooled plastic is separated from the texture mold to obtain a texture film.

[0110] The texture film preparation method includes providing a model substrate, engraving a reverse composite texture structure on the model substrate based on a selected composite texture structure to obtain a texture mold, and injecting a polymer material into the texture mold to form a texture film. The reverse composite texture structure and the composite texture structure are interlocked. The texture film is obtained by preparing a texture mold and injecting a polymer, wherein the texture mold can be reused, and a large number of texture films can be quickly prepared, thereby improving production efficiency.

[0111] In an exemplary embodiment, the engraving process is laser processing. Fig.10 As shown, step 204 is engraving a reverse composite texture structure on the model substrate, including steps 302 to 306.

[0112] Step 302: When the selected composite texture structure is an inverted cone structure, an inverted composite texture structure is engraved on the model substrate in a layer-by-layer engraving manner.

[0113] Step 304 : when the selected composite texture structure is a micro-spherical structure, the model substrate is engraved with an inverse composite texture structure by laser dot engraving.

[0114] Step 306 , when the selected composite texture structure is a wavy structure, engrave the reverse composite texture structure on the model substrate in a continuous scanning and layer-by-layer engraving manner.

[0115] In order to achieve better anti-fingerprint and super-hydrophobic effects, the texture levels must be carefully controlled during laser processing to ensure the three-dimensional effect of the microstructure and the dimensional consistency of each level. For example, a femtosecond laser is used for precision processing of a composite texture structure. Femtosecond lasers have an ultra-short pulse duration (usually on the order of 10^-15 seconds), which enables high energy density focusing within a short time scale, thereby achieving ultra-fine composite texture structure engraving. This extremely short pulse width allows the femtosecond laser to produce a non-thermal effect on the model substrate, thereby avoiding thermal damage to the surrounding area caused by high temperature and achieving high-precision engraving.

[0116] The laser pulse width is 150-200 femtoseconds (fs), which can control the laser energy input at a microscopic scale to ensure that there is no thermal effect on the edge of the engraving. The laser pulse repetition frequency is 1MHz-2MHz, which ensures multiple dot-marking per unit time and improves processing efficiency. The laser spot diameter is 0.5μm-1.0μm, which can meet the needs of nano-level microstructure engraving.

[0117] The power and pulse energy of the femtosecond laser are key parameters that determine the processing effect. In this application, considering the thermal sensitivity of the model substrate and the need for ultra-fine engraving, the average power of the laser can be selected to be 5-15 watts (W) to ensure sufficient processing depth under the premise of controlling the energy input. The single pulse energy of the laser is 500-700 nanojoules (nJ), combined with femtosecond pulses, to provide high energy density to achieve non-linear ablation of the material. The power density of the laser can be 10^12 W / cm², which can achieve self-focusing on the surface of the material, thereby ensuring the integrity of microstructures such as inverted cones and microspheres.

[0118] The processing speed and duration of femtosecond laser processing depend on the complexity and depth of the required composite texture structure. In order to ensure the accuracy of composite texture structures such as inverted cones, microspheres and wavy structures, the laser processing speed adopts a scanning speed of 0.1-0.5mm / s to complete high-density dotting in a short time to ensure the continuity and accuracy of the engraving. The processing time of the laser varies according to the composite texture structure. The single-point processing time of the inverted cone structure is 10-20 microseconds. The microsphere and wavy structures have a slightly longer processing time due to their larger area. The processing time of the wavy structure is about 2-5 minutes per centimeter.

[0119] The laser then performs multi-level scanning, and each structural level needs to be scanned and engraved multiple times to ensure the engraving depth and the clarity of the micro-texture. The inverted cone structure needs to be engraved 2-3 times to reach the required depth (about 0.5 mm).

[0120] Specifically, the inverted cone structure adopts a layer-by-layer engraving method, that is, each layer gradually reduces the engraving area to form a cone structure with a small bottom and a large top. A smaller energy density is used to engrave at the top of the inverted cone to ensure that a sharp edge is formed at the top. Among the size parameters of the inverted cone structure, the bottom diameter is 20μm, the height is 60μm, and the characteristic spacing between each inverted cone structure is 100μm. The density of the inverted cone structure is 30-50 inverted cone structure features per square centimeter, ensuring that a higher roughness is formed on the surface. The inverted cone structure can increase the contact angle of water droplets to more than 150°, achieving a super-hydrophobic effect. The inverted cone design increases the area where water droplets contact the air, allowing more water droplets to be suspended between the air and the microstructure, thereby significantly increasing the contact angle. In theory, the contact angle of such a microstructure can reach 150° to 160°.

[0121] The microspherical structure generates the outline of each microsphere by laser dot engraving, removing the material layer by layer and carving the surface to ensure the smooth surface of the microspherical structure. Among the size parameters of the microspherical structure, the diameter is 10μm, the height is 25μm, and the characteristic spacing between each microspherical structure is 40μm. The density of the microspherical structure is 60-100 microspherical structure features per square centimeter. Such a dense arrangement can effectively inhibit the diffusion of liquid. The microspherical protrusions reduce the contact area between the water droplets and the solid surface, forming a larger contact angle. The theoretical value of the surface contact angle of the microspherical structure can reach about 155°, which effectively inhibits the adhesion of fingerprints and grease, allowing the water droplets to roll off naturally.

[0122] The wavy structure uses a continuous scanning mode to carve the crests and troughs layer by layer, making the wave layers clear and uniform, ensuring that water droplets can flow along the waves to achieve a self-cleaning effect. The dimensional parameters of the wavy structure are: the height difference between the crest and the trough is 20μm, the crest width is 6μm, the trough width is 15μm, and the characteristic distance P between each wavy structure is 50μm. The density of the wavy structure is 40-80 ripples per square centimeter. The alternating changes of crests and troughs can effectively guide water droplets to contact specific points, reducing the tendency of liquids to spread. The wavy structure can achieve a contact angle of more than 150° at different inclination angles, ensuring that the surface has good guidance and is conducive to the sliding of water droplets.

[0123] In this embodiment, through the design and precision processing of the composite texture structure, the surface of the texture film can successfully achieve a super-hydrophobic effect, while greatly reducing the adhesion of fingerprints and grease. This design not only has excellent visual and tactile properties in appearance, but can also be widely used in electronic equipment housings, household appliances, daily necessities, automotive interiors and other occasions with high requirements for cleanliness.

[0124] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0125] Based on the same technical concept, the embodiment of the present application also provides a texture film preparation device for implementing the texture film preparation method involved above. The implementation solution provided by the device is similar to the implementation solution recorded in the above method, so the specific limitations in one or more texture film preparation device embodiments provided below can refer to the limitations of the texture film preparation method above, and will not be repeated here.

[0126] In an exemplary embodiment, Fig.11 As shown, a texture film preparation device is provided, including: a substrate module 1120, a processing module 1140 and a preparation module 1160, wherein:

[0127] The substrate module 1120 is used to provide a model substrate;

[0128] The processing module 1140 is used to carve a reverse composite texture structure on the model substrate based on the selected composite texture structure to obtain a texture mold; the reverse composite texture structure and the composite texture structure are interlocked;

[0129] The preparation module 1160 is used to inject a polymer material onto the texture mold to form a texture film.

[0130] In one embodiment, the processing module 1140 is also used to, when the selected composite texture structure is an inverted cone structure, engrave an inverted composite texture structure on the model substrate by a layer-by-layer engraving method; when the selected composite texture structure is a micro-spherical structure, engrave the inverted composite texture structure on the model substrate by a laser dot engraving method; when the selected composite texture structure is a wavy structure, engrave the inverted composite texture structure on the model substrate by a continuous scanning layer-by-layer engraving method.

[0131] Each module in the texture film preparation device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0132] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig.12As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a method for preparing a texture film is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0133] Those skilled in the art will understand that Fig.12 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0134] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0135] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0136] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0137] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0138] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 application.

[0139] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A textured film, characterized in that: The texture film comprises: Base membrane structure; A plurality of composite texture structures, each of which is arranged on the same side of the base membrane structure, and each of which is arranged independently of each other to form a hydrophobic structure.

2. The texture film according to claim 1, characterized in that: The texture film further comprises a composite texture group, wherein the composite texture group comprises a preset number of the composite texture structures, and the number of the composite texture groups is multiple; On the base film structure, each of the composite texture groups is arranged at a first distance; each of the composite texture structures in the composite texture group is arranged at a second distance; and the first distance is greater than the second distance.

3. The texture film according to claim 1, characterized in that: Taking the geometric center area of ​​the base membrane structure as the center of the circle, each of the composite texture structures is arranged on the circumference of a concentric circle of the center of the circle.

4. The texture film according to any one of claims 1 to 3, characterized in that: The composite texture structure is one or more of an inverted cone structure, a microsphere structure and a wavy structure.

5. The texture film according to claim 4, characterized in that: In the case where the composite texture structure is an inverted cone structure and / or a micro-spherical structure, the texture film further comprises an overlay structure, and the overlay structure is arranged on a side of the inverted cone structure and / or the micro-spherical structure away from the base film structure.

6. The texture film according to claim 5, characterized in that: In the case where the composite texture structure is an inverted cone structure, the superimposed structure includes a columnar structure, a trapezoidal structure and a hemispherical structure.

7. The texture film according to claim 5, characterized in that: In the case where the composite texture structure is a micro-spherical structure, the superimposed structure is a hemispherical structure.

8. An electronic device, characterized in that: The electronic device includes an electronic device and a texture film as described in any one of claims 1 to 7, wherein the texture film is arranged on the outer surface of the electronic device, the base film structure of the texture film is arranged in contact with the electronic device, and the composite texture structure of the texture film is arranged on a side of the base film structure away from the electronic device.

9. A method for preparing a textured film, characterized in that: For preparing the textured film according to any one of claims 1 to 7, the method comprises: Providing a model substrate; Based on the selected composite texture structure, an inverse composite texture structure is engraved on the model substrate to obtain a texture mold; the inverse composite texture structure is interlocked with the composite texture structure; A polymer material is injected onto the texture mold to form a texture film.

10. The method according to claim 9, characterized in that The step of engraving the reverse composite texture structure on the model substrate comprises: In the case where the selected composite texture structure is an inverted cone structure, engraving the inverted composite texture structure on the model substrate in a layer-by-layer engraving method; In the case where the selected composite texture structure is a micro-spherical structure, engraving the inverse composite texture structure on the model substrate by laser dot engraving; In the case where the selected composite texture structure is a wavy structure, the inverse composite texture structure is engraved on the model substrate in a continuous scanning and layer-by-layer engraving manner.

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