Multifunctional window and preparation method thereof

Abstract

The invention provides a multifunctional window and a preparation method thereof, and relates to the technical field of windows. The multifunctional window comprises a base layer, a bonding layer and a functional layer which are sequentially stacked, the material of the base layer comprises at least one of glass and plastic; the material of the functional layer comprises sapphire; the bonding layer is prepared from the following raw materials in parts by weight: 5 to 55 parts of acrylic resin, 15 to 30 parts of urethane acrylate, 5 to 10 parts of amino silane, 3 to 15 parts of siloxane and / or siloxane derivatives, 0.1 to 1 part of 4, 4-diaminodiphenylmethane, 0.1 to 1 part of dibutyl phthalate and 0.1 to 1 part of photoinitiator; the bonding layer is obtained by crosslinking and curing the preparation raw materials. By selecting the materials of the base layer, the bonding layer and the functional layer, the prepared multifunctional window has good light transmission, wear resistance, acid corrosion resistance and high strength, and is suitable for being applied to multiple fields.

Description

Technical Field

[0001] The present invention relates to the field of window technology, and in particular to a multifunctional window and a preparation method thereof. Background Art

[0002] With the development of science and technology, the application scenarios of cameras are becoming more and more extensive. For example, they are used in high-wind and sand environments, HF environments, explosion-proof environments, etc. People have higher and higher requirements for cameras, and the window, as the main functional unit of the camera, also needs to meet the growing demand. The hardness of traditional windows is relatively low, and they are easily scratched in high-wind and sand environments, resulting in a shorter life of the camera; in addition, their HF corrosion resistance is limited and cannot meet the application requirements of specific scenarios; in addition, the strength of traditional windows cannot meet the application requirements in explosion-proof environments. The current windows cannot meet the requirements of wear resistance, corrosion resistance, explosion resistance, and good light transmittance at the same time, and their application scenarios are limited. Therefore, it is urgent to provide a window that has good wear resistance, corrosion resistance, explosion resistance, and good light transmittance. Summary of the invention

[0003] The present invention provides a multifunctional window and a preparation method thereof, so as to solve the problem that the window in the prior art cannot simultaneously meet the requirements of wear resistance, corrosion resistance, explosion resistance and light transmission.

[0004] In order to solve the above technical problems, according to the first aspect of the present invention, a multifunctional window is provided, which includes a base layer, a bonding layer and a functional layer stacked in sequence; wherein the material of the base layer includes at least one of glass and plastic; the material of the functional layer includes sapphire; the raw materials for preparing the bonding layer include the following ingredients in parts by weight: 5-55 parts of acrylic resin, 15-30 parts of polyurethane acrylate, 5-10 parts of aminosilane, 3-15 parts of siloxane and / or siloxane derivatives, 0.1-1 part of 4,4-diaminodiphenylmethane, 0.1-1 part of dibutyl phthalate, and 0.1-1 part of photoinitiator; the bonding layer is obtained by thermally curing the prepared raw materials or sequentially performing thermal curing and cross-linking radiation.

[0005] Glass and plastic have good light transmittance. As base materials, they can provide basic light transmittance for the multifunctional windows. They also have certain strength and rigidity, and can play a good supporting role. Sapphire belongs to corundum, and its Mohs hardness can reach 9. It has high hardness, good wear resistance, and good resistance to wind and sand. The bonding layer prepared with the above-mentioned raw materials can tightly fix the functional layer on the base layer, and at the same time ensure that the multifunctional window has good light transmittance. By making the above-mentioned restrictions on the materials of each layer, the multifunctional window has good wear resistance and HF corrosion resistance, as well as high light transmittance and strength. It is suitable for use in high wind and sand scenes, explosion-proof scenes, and HF scenes, and its application field is relatively wide.

[0006] Furthermore, in the raw materials for preparing the bonding layer, the weight portion of acrylic resin is 15-30 parts.

[0007] Furthermore, the siloxane and / or siloxane derivative is at least one of vinyl polydimethylsiloxane and methyl vinyl silicone rubber; the photoinitiator is at least one of acylphosphine oxide, benzophenone derivative, benzoylformate photoinitiator, azo compound, and α-hydroxyketone derivative.

[0008] Furthermore, the thickness of the base layer is 2-9 mm; the thickness of the functional layer is 0.3-2 mm; and the thickness of the bonding layer is 25-250 μm.

[0009] The thickness of each layer is controlled in order to balance the strength, wear resistance, HF corrosion resistance and light transmittance of the multifunctional window so that it has better comprehensive performance.

[0010] Furthermore, when the material of the base layer is glass, the thickness of the base layer is 2-9 mm; when the material of the base layer is plastic, the thickness of the base layer is 2-6 mm.

[0011] Furthermore, the roughness Ra of the functional layer satisfies: 0.05 μm<Ra<0.25 μm.

[0012] The purpose of controlling the roughness of the functional layer is to improve the light transmittance of the functional layer and to enable the functional layer to be tightly bonded to the base layer through the bonding layer.

[0013] According to a second aspect of the present invention, there is provided a method for preparing a multifunctional window, comprising the following steps:

[0014] S1, cutting the base material and the functional layer material into the size required for making the window, chamfering and cleaning, to obtain the base layer and the pre-processed functional layer;

[0015] S2, grinding and polishing the material of the pre-treated functional layer to obtain the functional layer;

[0016] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0017] S4, coating the mixture onto a base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer, a bonding layer, and a functional layer stacked in sequence.

[0018] Furthermore, in S2, the grinding and polishing method is: grinding with a diamond soft grinding pad and a BUFF pad in sequence, and then polishing.

[0019] Furthermore, in S4, the lamination conditions are: temperature 20-25°C, humidity 40-70RH.

[0020] Furthermore, in S4, the cross-linking and curing is ultraviolet radiation cross-linking and curing, and the temperature of the cross-linking and curing is 60-70° C. and the time is 5-30 seconds.

[0021] The present invention designs the structure of the multifunctional window, covers the functional layer on the surface of the base layer, closely combines the functional layer with the base layer through the bonding layer, and selects the materials of each layer. On the one hand, the window can have the wear-resistant and corrosion-resistant performance of the functional layer, and on the other hand, the bonding strength between the functional layer and the base layer can be enhanced, the stability thereof can be improved, and the overall strength of the window can be improved; by selecting the materials of each layer, the window can also have good light transmittance. The multifunctional window prepared by the present invention can be applied to a variety of scenes, and its application range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a multi-functional window in an embodiment of the present invention;

[0023] The above drawings include the following figure marks: 1. base layer; 2. bonding layer; 3. functional layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0025] As described in the background technology of the present invention, with the development of technology, the application field of cameras is becoming wider and wider, and the performance of windows, which are the main functional components of cameras, also needs to be further improved to meet people's growing needs. At present, windows cannot have the performance of wind and sand protection, HF corrosion protection, explosion protection and high light transmittance.

[0026] In order to solve the above technical problems, in a typical embodiment of the present invention, a multifunctional window is provided. Figure 1 The present invention is a schematic diagram of its structure; it comprises a base layer 1, a bonding layer 2 and a functional layer 3 which are stacked in sequence; wherein the material of the base layer comprises at least one of glass and plastic; the material of the functional layer comprises sapphire; the raw materials for preparing the bonding layer comprise the following components in parts by weight: 5-55 parts of acrylic resin, 15-30 parts of polyurethane acrylate, 5-10 parts of aminosilane, 3-15 parts of siloxane and / or siloxane derivatives, 0.1-1 parts of 4,4-diaminodiphenylmethane, 0.1-1 parts of dibutyl phthalate and 0.1-1 parts of photoinitiator; the bonding layer is obtained by cross-linking and curing the raw materials.

[0027] In the description of the present invention, the term "acrylic resin" refers to a polymer compound polymerized from acrylic monomers.

[0028] Plastic and glass have good light transmittance, which can meet the basic optical requirements of windows and are suitable as base materials. Sapphire is an α-Al2O3 single crystal with a hexagonal lattice structure. It has high hardness, wear resistance, and an elastic modulus of 340-380GPa. It can be used in high wind and sand scenes and is suitable as a functional layer material. The selection of raw materials for the bonding layer can improve the bonding strength between the functional layer and the base layer, while having little effect on the light transmittance of the window. By selecting three layers of materials, the window has both good wear resistance and light transmittance, as well as high strength and HF corrosion resistance, and can be used in a variety of scenarios.

[0029] In some embodiments, the weight portion of acrylic resin in the raw materials for preparing the bonding layer is 15-30 parts.

[0030] By controlling the weight of the raw materials used to prepare the binding layer, the light transmittance and stability of the window can be further improved.

[0031] In some embodiments, when the base material is plastic, a protective layer can be made on its surface to prevent substrate wear, such as coating with a diamond-like film, a silicon dioxide film, etc.; the base material glass can be quartz glass, float glass, cast glass, etc.; the glass can also be untempered glass, semi-tempered glass or fully tempered glass; a diffusion barrier layer, such as a silicon dioxide film layer, can also be plated on the glass surface to prevent sodium ions inside the glass from entering the bonding layer and affecting its performance.

[0032] In some embodiments, the visible light transmittance of the glass is higher than 90%, and may be specifically 90.5%, 91%, 91.5%, 92%, etc., which is not specifically limited here.

[0033] In some embodiments, the siloxane and / or siloxane derivative is at least one of vinyl polydimethylsiloxane and methyl vinyl silicone rubber; the photoinitiator is at least one of acylphosphine oxide, benzophenone derivatives, benzoylformate photoinitiators, azo compounds, and α-hydroxyketone derivatives.

[0034] In some embodiments, the acylphosphine oxide is at least one of 2,4,6-trimethylbenzoyl-ethoxy-phenylphosphine oxide (TEPO) and 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO); the benzophenone derivative is at least one of benzophenone and Michler's ketone; the benzoylformate photoinitiator is methyl benzoylformate, etc.; the azo compound is azobisisobutyronitrile, etc.; the α-hydroxyketone derivative is 2-hydroxy-2-methyl-p-hydroxyethyl ether phenylacetone-1, etc.

[0035] In some embodiments, the thickness of the base layer is 2-9 mm; the thickness of the functional layer is 0.3-2 mm; and the thickness of the bonding layer is 25-250 μm.

[0036] The thickness of each layer is limited in order to achieve a good balance among the light transmittance, wear resistance, HF corrosion resistance and strength of the multifunctional window.

[0037] In some embodiments, when the material of the base layer is glass, the thickness of the base layer is 2-9 mm; when the material of the base layer is plastic, the thickness of the base layer is 2-6 mm.

[0038] Plastic and glass have different strengths and light transmittances. Glass has better light transmittance, but plastic is lighter. You can choose according to different needs. Controlling the thickness of glass or plastic within the above range is to make the base layer have good light transmittance and certain toughness and rigidity, so as to play a good supporting role.

[0039] In some embodiments, the roughness Ra of the functional layer satisfies: 0.05 μm<Ra<0.25 μm.

[0040] The functional layer material has good wear resistance, but its light transmittance is relatively poor. By controlling its roughness, on the one hand, its light transmittance can be improved, and on the other hand, its bonding strength with the base layer can be improved, thereby improving the structural stability of the window and increasing its service life.

[0041] In another typical embodiment of the present invention, a method for preparing a multifunctional window is provided, comprising the following steps:

[0042] S1, cutting the base material and the functional layer material into the size required for making the window, chamfering and cleaning, to obtain the base layer and the pre-processed functional layer;

[0043] S2, grinding and polishing the material of the pre-treated functional layer to obtain the functional layer;

[0044] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0045] S4, coating the mixture onto a base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer, a bonding layer, and a functional layer stacked in sequence.

[0046] The light transmittance of the functional layer can be effectively improved by grinding and polishing, and the functional layer can also be stably attached to the binding layer, so that the functional layer can be fixed on the base layer. The preparation method disclosed by the invention is simple, has fewer processes, and is suitable for industrial production.

[0047] In some embodiments, in S2, the grinding and polishing method is: grinding with a diamond soft grinding sheet and a BUFF sheet in sequence, and then polishing. Specifically, during the grinding process, the mesh number of the diamond soft grinding sheet is gradually increased until it reaches the maximum mesh number, and then the BUFF sheet is used for grinding and pre-polishing; the polishing is performed on a cloth wheel, and diamond polishing paste is used during the polishing process.

[0048] By polishing under the above conditions, the roughness Ra of the functional layer satisfies: 0.05 μm<Ra<0.25 μm, which can further improve the light transmittance of the functional layer.

[0049] In some embodiments, in S4, the lamination conditions are: temperature 20-25° C., humidity 40-70 RH.

[0050] In some embodiments, in S4, the crosslinking and curing method may be one of thermal crosslinking and radiation crosslinking.

[0051] In some embodiments, in S4, the cross-linking and curing is ultraviolet radiation cross-linking and curing, and the temperature of the cross-linking and curing is 60-70° C. and the time is 5-30 s.

[0052] Under the above conditions, cross-linking and curing are carried out, and the functional layer and the base layer can be cross-linked and cured through the cross-linking system in the bonding layer to form a cross-linking network, thereby improving the bonding strength between the functional layer and the base layer.

[0053] In some embodiments, in S4, after the cross-linking and curing is completed, the product is cleaned to obtain a multifunctional window.

[0054] The window disclosed in the present invention can be applied to cameras to meet the requirements of high sandstorm scenes, HF scenes and explosion-proof scenes.

[0055] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0056] The material information used in the examples and comparative examples is as follows:

[0057] Glass: Quartz glass, visible light transmittance is 91%.

[0058] Example 1

[0059] An embodiment of the multifunctional window of the present invention, the preparation method of the multifunctional window of this embodiment is as follows:

[0060] S1, cutting glass (6 mm thick) and sapphire (1 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0061] S2, grinding and polishing the pretreated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, 400 mesh diamond soft grinding sheet, 600 mesh diamond soft grinding sheet, and BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.1 μm;

[0062] S3, weighing the raw materials for preparing the binding layer according to the ratio to obtain a mixture, the raw materials for preparing the binding layer are shown in Table 1;

[0063] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 6 mm), a bonding layer (thickness of 50 μm) and a functional layer (thickness of 0.8 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C for 10 seconds.

[0064] Example 2

[0065] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in the thickness of the base layer, the bonding layer and the functional layer; the preparation method of the multifunctional window of this embodiment is as follows:

[0066] S1, cutting glass (thickness of 2 mm) and sapphire (thickness of 2 mm) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0067] S2, grinding and polishing the pretreated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, 400 mesh diamond soft grinding sheet, 600 mesh diamond soft grinding sheet, and BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.1 μm;

[0068] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0069] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 2 mm), a bonding layer (thickness of 250 μm) and a functional layer (thickness of 1.8 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C for 20 seconds.

[0070] Example 3

[0071] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in the thickness of the glass and the sapphire; the preparation method of the multifunctional window of this embodiment is as follows:

[0072] S1, cutting glass (9 mm thick) and sapphire (0.5 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0073] S2, grinding and polishing the pretreated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, 400 mesh diamond soft grinding sheet, 600 mesh diamond soft grinding sheet, and BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.09 μm;

[0074] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0075] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (9 mm thick), a bonding layer (25 μm thick) and a functional layer (0.3 mm thick) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C and a time of 8s.

[0076] Example 4

[0077] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in that the roughness of the functional layer is different; the preparation method of the multifunctional window of this embodiment is as follows:

[0078] S1, cutting glass (6 mm thick) and sapphire (1 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0079] S2, grinding and polishing the pretreated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, 400 mesh diamond soft grinding sheet, 600 mesh diamond soft grinding sheet, 1000 mesh diamond soft grinding sheet, and BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.05 μm;

[0080] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0081] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 6 mm), a bonding layer (thickness of 50 μm) and a functional layer (thickness of 0.79 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C and a time of 10s.

[0082] Example 5

[0083] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in that the roughness of the functional layer is different; the preparation method of the multifunctional window of this embodiment is as follows:

[0084] S1, cutting glass (6 mm thick) and sapphire (1 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0085] S2, grinding and polishing the pre-treated functional layer, the grinding and polishing method is: grinding with 250 mesh diamond soft grinding sheet, 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.25 μm;

[0086] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0087] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 6 mm), a bonding layer (thickness of 50 μm) and a functional layer (thickness of 0.82 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C and a time of 10s.

[0088] Example 6

[0089] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in that the roughness of the functional layer is different; the preparation method of the multifunctional window of this embodiment is as follows:

[0090] S1, cutting glass (6 mm thick) and sapphire (1 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0091] S2, grinding and polishing the pretreated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding sheet, 350 mesh diamond soft grinding sheet, 400 mesh diamond soft grinding sheet, 600 mesh diamond soft grinding sheet, 1000 mesh diamond soft grinding sheet, 1200 mesh diamond soft grinding sheet, BUFF sheet in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.02 μm;

[0092] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0093] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 6 mm), a bonding layer (thickness of 50 μm) and a functional layer (thickness of 0.77 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C and a time of 10s.

[0094] Example 7

[0095] An embodiment of the multifunctional window of the present invention, the multifunctional window of this embodiment is different from that of embodiment 1 only in that the roughness of the functional layer is different; the preparation method of the multifunctional window of this embodiment is as follows:

[0096] S1, cutting glass (6 mm thick) and sapphire (1 mm thick) into blocks with a size of 74 mm × 38 mm, followed by chamfering and cleaning to obtain a base layer and a pre-treatment functional layer;

[0097] S2, grinding and polishing the pre-treated functional layer, the grinding and polishing method is: grinding with 300 mesh diamond soft grinding pad, 350 mesh diamond soft grinding pad, BUFF pad in sequence, and then polishing with a cloth wheel, applying diamond polishing paste during the polishing process, to obtain a functional layer with a roughness Ra of 0.3 μm;

[0098] S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture;

[0099] S4, coating the mixture onto the base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer (thickness of 6 mm), a bonding layer (thickness of 50 μm) and a functional layer (thickness of 0.81 mm) stacked in sequence; the laminating conditions are: temperature 25°C, humidity 50RH; ultraviolet radiation cross-linking and curing at a temperature of 60°C for 10 seconds.

[0100] Embodiment 8-11

[0101] An embodiment of the multifunctional window of the present invention, embodiments 8-11 are different from embodiment 1 only in that the raw materials for preparing the bonding layer are different, as shown in Table 1.

[0102] Table 1 (parts by weight)

[0103]

[0104] Performance Testing

[0105] 1. Elastic modulus: Use an elastic modulus tester to apply tensile force to deform an object and measure the relationship between stress and strain. Calculate the elastic modulus based on Hooke's law.

[0106] 2. Bonding strength: Use a tensile gauge to test the tensile strain and stress of the bonding layer to accurately measure its bonding strength;

[0107] 3. Visible light transmittance: Use the spectroscopic reflection method to measure the visible light transmittance of glass; aim the detector of the spectrometer at one side of the sample and measure the light intensity passing through the sample; transmittance = transmitted light intensity / incident light intensity.

[0108] 4. Mohs hardness: Use the scratch hardness method to test the Mohs hardness of the sample;

[0109] 5. HF corrosion resistance: The functional layer of Example 1 was immersed in a 40% hydrofluoric acid solution for 96 hours; the surface state of the sample was observed, and the visible light transmittance before and after immersion was compared, and the change rate of the visible light transmittance was recorded.

[0110] Table 2 shows the performance test results.

[0111] Table 2

[0112]

[0113] It can be seen from Table 2 that the light transmittance of the multifunctional window in the embodiment of the present invention can reach more than 85%, and it has a high elastic modulus, high Mohs hardness, and excellent wear resistance; in addition, the bonding strength of the bonding layer is high, which is beneficial to improving the structural stability of the transparent window, so that it can be used in environments with high requirements for wear resistance and strength at the same time, and has a wide range of applications.

[0114] The HF resistance test result of Example 1 is: the functional layer does not react after being immersed in a 40% hydrofluoric acid solution for 96 hours, the appearance is good, and the optical transmittance remains unchanged. This result shows that the multifunctional window prepared by the present invention can also be used in HF environment.

[0115] In addition, by comparing the performance test results of Example 1 and Examples 4 to 7, it can be found that the roughness of the functional layer has a great influence on the performance of the multifunctional window. When the roughness Ra of the functional layer satisfies: 0.05μm<Ra<0.25μm, the comprehensive performance of the multifunctional window is better.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional window, characterized in that: The invention comprises a base layer, a bonding layer and a functional layer which are stacked in sequence; the material of the base layer comprises at least one of glass and plastic; the material of the functional layer comprises sapphire; the raw materials for preparing the bonding layer comprise the following components in parts by weight: 5-55 parts of acrylic resin, 15-30 parts of polyurethane acrylate, 5-10 parts of aminosilane, 3-15 parts of siloxane and / or siloxane derivatives, 0.1-1 part of 4,4-diaminodiphenylmethane, 0.1-1 part of dibutyl phthalate and 0.1-1 part of photoinitiator; the bonding layer is obtained by cross-linking and curing the raw materials.

2. The multifunctional window according to claim 1, characterized in that: The weight portion of the acrylic resin is 15-30 parts.

3. The multifunctional window according to claim 1 or 2, characterized in that: The siloxane and / or siloxane derivative is at least one of vinyl polydimethylsiloxane and methyl vinyl silicone rubber; the photoinitiator is at least one of acylphosphine oxide, benzophenone derivative, benzoylformate photoinitiator, azo compound, and α-hydroxyketone derivative.

4. The multifunctional window according to claim 1, characterized in that: The thickness of the base layer is 2-9 mm; the thickness of the functional layer is 0.3-2 mm; and the thickness of the bonding layer is 25-250 μm.

5. The multifunctional window according to claim 4, characterized in that: When the material of the base layer is glass, the thickness of the base layer is 2-9 mm; when the material of the base layer is plastic, the thickness of the base layer is 2-6 mm.

6. The multifunctional window according to claim 1 or 2, characterized in that: The roughness Ra of the functional layer satisfies: 0.05 μm<Ra<0.25 μm.

7. A method for preparing a multifunctional window according to any one of claims 1 to 6, characterized in that: The steps include: S1, cutting the base material and the functional layer material into the size required for making the window, chamfering and cleaning, to obtain the base layer and the pre-processed functional layer; S2, grinding and polishing the material of the pre-treated functional layer to obtain a functional layer; S3, weighing raw materials for preparing the binding layer according to a ratio to obtain a mixture; S4, coating the mixture onto a base layer, and then laminating the functional layer onto the mixture, and cross-linking and curing the mixture to obtain a multifunctional window having a base layer, a bonding layer, and a functional layer stacked in sequence.

8. The preparation method according to claim 7, characterized in that: In S2, the grinding and polishing method is: grinding with a diamond soft grinding sheet and a BUFF sheet in sequence, and then polishing.

9. The preparation method according to claim 7, characterized in that: In S4, the lamination conditions are: temperature 20-25° C., humidity 40-70 RH.

10. The preparation method according to claim 7, characterized in that: In S4, the cross-linking and curing is ultraviolet radiation cross-linking and curing; the temperature of the cross-linking and curing is 60-70° C., and the time is 5-30 seconds.

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