High-transparency anti-blast film for automobile window and preparation method thereof

Abstract

The application discloses a high-transmittance anti-explosion film for automobile window and a preparation method thereof. From bottom to top, the film comprises a release film, a bonding layer, a polyester film, a reflection and absorption layer and a surface layer. The surface layer comprises, in mass parts, 2-5 parts of modified SiO2 aerogel, 0.5-1 part of a leveling agent, 10-20 parts of a bonding resin and 70-80 parts of a solvent. The bonding layer comprises, in mass parts, 90-100 parts of a bonding resin and 0.5-2 parts of modified SiO2 aerogel. The preparation method of the modified SiO2 aerogel comprises the following steps: obtaining a reaction intermediate under acid catalysis by using methyltrimethoxysilane; and mixing and reacting the reaction intermediate with phenyltrimethoxysilane to obtain the modified SiO2 aerogel. The high-transmittance anti-explosion film has the characteristics of high infrared blocking rate, high tensile strength and high peeling strength, and has good light transmittance, heat insulation performance and anti-explosion performance. The high-transmittance anti-explosion film is very suitable for application to automobile window films.

Description

Technical Field

[0001] This invention relates to the field of automotive plastic film technology, and in particular to a high-transmittance, explosion-proof film for automotive windows and its preparation method. Background Technology

[0002] Automotive window tinting involves applying a thin film of material, also known as solar film or heat insulation film, to the front and rear windshields, side windows, and sunroof of a vehicle. Its main functions are to block ultraviolet rays, reduce heat, prevent injuries from shattered glass, and reduce glare. Additionally, the one-way visibility of the film helps protect privacy. Furthermore, automotive window tinting can reduce damage to items and occupants from ultraviolet radiation. Through physical reflection, it lowers the interior temperature, reducing the need for air conditioning and thus reducing fuel consumption and saving money. Explosion-proof films typically employ a multi-layered composite structure design, achieving optimized overall performance through the synergistic effect of different functional layers. These typically include an explosion-proof adhesive layer, an optical-grade PET substrate layer, a metal / ceramic functional layer, and a surface functional coating.

[0003] With the improvement of living standards, screen protectors with good UV protection, strong heat insulation, and high clarity have received more attention. CN111004585A discloses a high-transmittance, high-definition, explosion-proof polyester film and its preparation method. The film includes a coating layer, a first functional layer, a core layer, a second functional layer, a metal heat insulation layer, an adhesive layer, a PET base film layer, and an adhesive layer. The use of hollow silica nanospheres / nanotubes as the coating layer material and the UV-resistant core layer effectively improves the performance of the polyester film; however, the film preparation is complex. CN116442627A discloses an automotive polyester window film and its preparation method. The film comprises an outer layer, a core layer, and an inner layer. The outer layer comprises 20%–40% infrared absorber, 57%–79% high-temperature resistant optical-grade PET chips, and 1%–3% anti-photoaging agent. The core layer comprises 5%–40% infrared absorber, 57%–93.8% high-temperature resistant optical-grade PET chips, 0.2%–3% anti-photoaging agent, and 1%–10% aerogel powder. The inner layer comprises 5%–10% aerogel powder, 3%–7% UV stabilizer, and 83%–92% high-temperature resistant optical-grade PET chips. This window film has a high total solar energy rejection rate and low visible light transmittance, exhibiting strong heat insulation performance. However, the use of SiO2 aerogel in the inner layer has the drawback of poor compatibility with the polyester matrix, and it may easily detach with long-term use.

[0004] Therefore, it is necessary to adjust and improve the structure and composition of automotive window films. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a high-transmittance explosion-proof film for automotive windows, comprising, from bottom to top, a release film, an adhesive layer, a polyester film, a reflective absorption layer, and a surface layer. The surface layer, by weight, comprises 2-5 parts modified SiO2 aerogel, 0.5-1 parts leveling agent, 10-20 parts adhesive resin, and 70-80 parts solvent. The adhesive layer, by weight, comprises 90-100 parts adhesive resin and 0.5-2 parts modified SiO2 aerogel. The preparation method of the modified SiO2 aerogel includes: obtaining a reaction intermediate from methyltrimethoxysilane under acid catalysis; and reacting the reaction intermediate with phenyltrimethoxysilane to obtain the modified SiO2 aerogel.

[0006] SiO2 aerogels possess advantages such as high porosity, low thermal conductivity, thermal stability, hydrophobicity, high light transmittance, and low refractive index, making them widely used in various fields such as optics, acoustics, mechanics, and thermodynamics. The sol-gel method is the main method for preparing SiO2 aerogels. After gel formation, the liquid in the gel pores contains a large number of unreacted groups and particles. At this stage, the network structure formed by Si-O-Si covalent bonds is weakly interconnected, and direct drying easily causes the aerogel skeleton to collapse. Therefore, after gel formation, a small amount of solvent is usually added to the gel, and it is allowed to stand for several days for aging treatment before the subsequent drying process. While aging treatment plays an important role in preventing gel skeleton shrinkage during subsequent drying, it is difficult to completely overcome the capillary forces generated during atmospheric pressure drying that damage the gel skeleton.

[0007] Therefore, this invention utilizes the hydrolysis of methyltrimethoxysilane under acidic conditions. Simultaneously, hydroxyl groups (-OH) undergo a condensation reaction on the surface to form Si-O-Si bonds. Further condensation forms a polysilane reaction intermediate with a Si-O-Si backbone cross-linked network structure. Introducing the polysilane reaction intermediate after the acidic hydrolysis of phenyltrimethoxysilane allows it to act as a co-precursor in the formation of the gel network structure, playing a role in regulating the structure and overcoming the capillary forces that damage the aerogel structure during drying.

[0008] In this invention, the type of leveling agent for the surface layer material is not strictly limited and can be at least one of acrylic, silicone and fluorocarbon compounds.

[0009] Further, the preparation method of the modified SiO2 aerogel includes, by weight, the following steps: mixing 15-25 parts of methyltrimethoxysilane and 10-15 parts of ethanol, then adding 50-80 parts of water and 2-5 parts of 0.1-0.5 mol / L hydrochloric acid, and heating and stirring to obtain a reaction intermediate; mixing 5-10 parts of phenyltrimethoxysilane, 2-5 parts of ethanol, 20-30 parts of water, and 0.5-1 part of 0.1-0.5 mol / L hydrochloric acid, then adding 3-7 parts of the reaction intermediate and 1-1.5 parts of tetrapropylammonium hydroxide, stirring and reacting, and then aging to obtain the modified SiO2 aerogel.

[0010] The present invention also introduces a small amount of tetra(triethanolamine)zirconium into the sol-gel process, which makes the structure of the modified SiO2 aerogel more stable.

[0011] Furthermore, tetra(triethanolamine)zirconium is added in an amount of 0.1 to 0.3 times the mass of phenyltrimethoxysilane when tetrapropylammonium hydroxide is added.

[0012] Furthermore, the material of the reflective absorption layer comprises, by weight, 5-10 parts infrared reflective powder, 5-10 parts ultraviolet absorber powder, 1-3 parts metal powder, 10-20 parts binder resin, 70-80 parts solvent, and 1-3 parts dispersant.

[0013] Currently, metal dielectric layers prepared by thermal evaporation aluminum deposition and magnetron sputtering metal processes have good near-infrared radiation reflection effects, but they suffer from severe specular reflection. This invention prepares an infrared reflective powder, ultraviolet absorber powder, metal powder, dispersant, binder resin, and solvent into a slurry, which is then coated onto the surface of a polyester film to form a reflective absorption layer. Both the near-infrared reflective powder and the metal powder have near-infrared radiation reflection properties, the ultraviolet absorber powder effectively absorbs ultraviolet light, and the binder resin provides good adhesion to the polyester film. The overall result is good weather resistance and excellent near-infrared radiation reflection and ultraviolet radiation shielding effects.

[0014] Further, the infrared reflective powder includes at least one of tin oxide, tungsten oxide, cesium tungstate, antimony tin oxide, and indium tin oxide (500-1500 mesh); the ultraviolet absorber includes at least one of zinc oxide, titanium dioxide, and cerium dioxide (1000-3000 mesh); the metal powder includes at least one of vanadium, aluminum, copper, and tungsten (10-100 nm); the solvent includes at least one of ethyl acetate, butyl acetate, acetone, and butanone; and the dispersant includes at least one of sodium tripolyphosphate, sodium hexametaphosphate, triethylhexylphosphate, polyacrylamide, and methylpentanol.

[0015] Furthermore, the adhesive resin includes at least one of polymethyl methacrylate, polyurethane, and polyacrylate.

[0016] Furthermore, the thicknesses of the reflective absorption layer and the surface layer are 10~20μm and 5~10μm, respectively.

[0017] Furthermore, the thickness of the adhesive layer is 5~15μm.

[0018] Furthermore, the thickness of the polyester film is 10~30μm.

[0019] The present invention also provides a method for preparing the above-mentioned high light transmittance and explosion-proof film for automotive windows, characterized in that it includes preparing a reflective absorption layer and a surface layer sequentially on one side of a polyester film; preparing an adhesive layer on the other side of the polyester film; and bonding the adhesive layer to a release film to obtain a high light transmittance and explosion-proof film for automotive windows.

[0020] Compared to existing technologies, the present invention has the following advantages: the high-transmittance explosion-proof film of the present invention features high infrared blocking rate, high tensile strength, and high peel strength, while also possessing good light transmittance, heat insulation performance, and explosion-proof performance. The high-transmittance explosion-proof film of the present invention is highly suitable for application in automotive window films. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of the high-transmittance explosion-proof film for automotive windows of the present invention is shown.

[0022] Figure 2 A scanning electron microscope image of the SiO2 aerogel prepared in Comparative Example 1 is shown.

[0023] Figure 3 A scanning electron microscope image of the modified SiO2 aerogel prepared in Example 1 is shown.

[0024] Figure 4 A scanning electron microscope image of the modified SiO2 aerogel prepared in Example 2 is shown. Detailed Implementation

[0025] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0026] The following is a description of some of the raw materials used in the embodiments and comparative examples of this invention: polyacrylate, model LO CTITEDURO-TAK 4103, purchased from Henkel AG, Germany; polyester film, with a transmittance of 93%, haze ≤0.6%, and thickness of 25 μm; infrared reflective powder composed of equal masses of 1000-mesh cesium tungstate and 1000-mesh tin oxide; ultraviolet absorbing powder composed of equal masses of 2500-mesh zinc oxide and 2500-mesh titanium dioxide; aluminum powder, spherical, with a diameter of approximately 60 nm; polymethyl methacrylate, model TT70, purchased from Evonik Degussa, Germany; leveling agent, model BYK-306, purchased from BYK Chemical AG, Germany; other raw materials not mentioned are common raw materials. The above content is only for illustrative purposes and should not be construed as a strict limitation of this invention. Those skilled in the art can directly purchase commercially available materials or prepare the same / similar materials themselves. These contents will not be repeated in the embodiments.

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0028] A method for preparing a high-transmittance explosion-proof film for automotive windows includes the following steps: S1, 9.8 kg of polyacrylate and 0.2 kg of modified SiO2 aerogel are stirred at 350 rpm for 10 min to obtain an adhesive layer material.

[0029] S2. 0.4 kg cesium tungstate, 0.4 kg tin oxide, 0.4 kg zinc oxide, 0.4 kg titanium dioxide, 0.2 kg aluminum powder, 1.5 kg polymethyl methacrylate, 7.5 kg acetone, and 0.2 kg sodium tripolyphosphate were ball-milled at 350 rpm for 3 hours to obtain a reflective absorption layer slurry.

[0030] S3. Mix 0.3 kg of modified SiO2 aerogel, 1.5 kg of polymethyl methacrylate and 7.5 kg of acetone at 300 rpm for 30 min, then add 0.08 kg of leveling agent to obtain the surface material.

[0031] S4. A reflective absorption layer paste is coated on one side of the polyester film and baked at 60°C to obtain a reflective absorption layer with a thickness of 15μm; then, a surface layer material is coated on the reflective absorption layer and baked at 60°C to obtain a 10μm surface layer; an adhesive layer material is coated on the other side of the polyester film to form an adhesive layer with a thickness of 10μm, which is then laminated with a release film to obtain the desired result. Figure 1 The image shows a high-transmittance, explosion-proof film for automotive windows.

[0032] The preparation method of modified SiO2 aerogel is as follows: T1, 0.2 kg of methyltrimethoxysilane and 0.12 kg of ethanol are stirred and mixed, and then 0.6 kg of water and 0.03 kg of 0.2 mol / L hydrochloric acid are added. The mixture is heated to 80℃ and stirred at 300 rpm for 6 h to obtain the reaction intermediate.

[0033] T2. 0.8 kg phenyltrimethoxysilane, 0.3 kg ethanol, 2.5 kg water, and 0.08 kg 0.2 mol / L hydrochloric acid were stirred at 300 rpm for 30 min. Then, 0.5 kg of the reaction intermediate obtained in step T1 and 0.1 kg tetrapropylammonium hydroxide were added, and the reaction was stirred for another 5 h. Then, 0.5 kg ethanol was added and the mixture was aged for 12 h. Then, n-hexane was added and the mixture was aged for another 24 h. The insoluble matter was then collected by filtration and dried in a vacuum oven at 50 °C to constant weight to obtain modified SiO2 aerogel. Example 2

[0034] A method for preparing a high-transmittance explosion-proof film for automotive windows includes the following steps: S1, 9.8 kg of polyacrylate and 0.2 kg of modified SiO2 aerogel are stirred at 350 rpm for 10 min to obtain an adhesive layer material.

[0035] S2. 0.4 kg cesium tungstate, 0.4 kg tin oxide, 0.4 kg zinc oxide, 0.4 kg titanium dioxide, 0.2 kg aluminum powder, 1.5 kg polymethyl methacrylate, 7.5 kg acetone, and 0.2 kg sodium tripolyphosphate were ball-milled at 350 rpm for 3 hours to obtain a reflective absorption layer slurry.

[0036] S3. Mix 0.3 kg of modified SiO2 aerogel, 1.5 kg of polymethyl methacrylate and 7.5 kg of acetone at 300 rpm for 30 min, then add 0.08 kg of leveling agent to obtain the surface material.

[0037] S4. A reflective absorption layer slurry is coated on one side of the polyester film and baked at 60°C to obtain a reflective absorption layer with a thickness of 15μm. Then, a surface layer material is coated on the reflective absorption layer and baked at 60°C to obtain a surface layer with a thickness of 10μm. An adhesive layer material is coated on the other side of the polyester film to form an adhesive layer with a thickness of 10μm, which is then bonded to a release film to obtain a high-transmittance explosion-proof film for automotive windows.

[0038] The preparation method of modified SiO2 aerogel is as follows: T1, 0.2 kg of methyltrimethoxysilane and 0.12 kg of ethanol are stirred and mixed, and then 0.6 kg of water and 0.03 kg of 0.2 mol / L hydrochloric acid are added. The mixture is heated to 80℃ and stirred at 300 rpm for 6 h to obtain the reaction intermediate.

[0039] T2. 0.8 kg phenyltrimethoxysilane, 0.3 kg ethanol, 2.5 kg water, and 0.08 kg 0.2 mol / L hydrochloric acid were stirred at 300 rpm for 30 min. Then, 0.5 kg of the reaction intermediate obtained in step T1, 0.1 kg tetrapropylammonium hydroxide, and 0.2 kg tetra(triethanolamine)zirconium were added, and the reaction was stirred for another 5 h. Then, 0.5 kg ethanol was added and the mixture was aged for 12 h. Then, n-hexane was added and the mixture was aged for another 24 h. The insoluble matter was then collected by filtration and dried in a vacuum oven at 50 °C until constant weight to obtain modified SiO2 aerogel.

[0040] Comparative Example 1 differs from Example 2 in that SiO2 aerogel is used instead of modified SiO2 aerogel. The preparation method of SiO2 aerogel is as follows: 0.8 kg of phenyltrimethoxysilane, 0.3 kg of ethanol, 2.5 kg of water, and 0.2 kg of 0.2 mol / L hydrochloric acid are stirred at 300 rpm for 30 min. Then, 0.03 kg of tetrapropylammonium hydroxide and 0.2 kg of tetra(triethanolamine)zirconium are added, and the reaction is continued to be stirred for 5 h. Then, 0.5 kg of ethanol is added for aging for 12 h, and then n-hexane is added for aging for 24 h. The insoluble matter is then filtered and collected and dried in a vacuum oven at 50 °C to constant weight to obtain SiO2 aerogel.

[0041] Comparative Example 2: A method for preparing a high-transmittance explosion-proof film for automotive windows, comprising the following steps: S1, ball milling 0.4 kg cesium tungstate, 0.4 kg tin oxide, 0.4 kg zinc oxide, 0.4 kg titanium dioxide, 0.2 kg aluminum powder, 1.5 kg polymethyl methacrylate, 7.5 kg acetone, and 0.2 kg sodium tripolyphosphate at 350 rpm for 3 hours to obtain a reflective absorption layer slurry; S2, ball milling 1.5 kg polymethyl methacrylate and 7.5 kg acetone at 300 rpm for 3 hours... Stir at rpm for 30 minutes, then add 0.08 kg of leveling agent to obtain the surface layer material; S3, coat one side of the polyester film with a reflective absorption layer slurry and bake at 60°C to obtain a reflective absorption layer with a thickness of 15 μm; then coat the surface layer material on the reflective absorption layer and bake at 60°C to obtain a 10 μm surface layer; coat the other side of the polyester film with polyacrylate to form an adhesive layer with a thickness of 10 μm, and then bond it with the release film to obtain a high light transmittance explosion-proof film for automotive windows.

[0042] Test Example: The microstructure of the SiO2 aerogel materials prepared in the examples and comparative examples was observed using scanning electron microscopy. From Figures 1-3It can be seen that the SiO2 aerogel of Comparative Example 1 is composed of interconnected micron-sized particles; while the modified SiO2 aerogel of Example 2 is a uniform network structure formed by nanoparticles. These results indicate that the introduction of polysilane reaction intermediates after the hydrolysis reaction of phenyltrimethoxysilane under acidic conditions allows these polysilane reaction intermediates to participate in the formation of the gel network structure as co-precursors, thus playing a role in regulating the structure. Furthermore, the particles of the modified SiO2 aerogel in Example 2 are finer than those in Example 1, indicating that the presence of tetrakis(triethanolamine)zirconium further regulates the microstructure of the aerogel.

[0043] The specific surface area of ​​the SiO2 aerogel materials prepared in the examples and comparative examples was tested using a fully automated specific surface area and pore size distribution analyzer according to the BET equation. The water contact angle of the SiO2 aerogel materials prepared in the examples and comparative examples was tested using a contact angle meter. These test results are shown in Table 1. Among them, the water contact angle is higher than 150°, which is considered to be a superhydrophobic material.

[0044] Table 1. Specific surface area and water contact angle test results

[0045] As can be seen from the test results in Table 1, the polysilane reaction intermediate plays a significant role in regulating the formation of the gel network structure as a co-precursor. The regulation of the particle size constituting the aerogel skeleton changes the pore structure of the aerogel, thereby changing the specific surface area; it also improves the hydrophobic properties of the aerogel.

[0046] The light transmittance and haze of the film were tested according to the national standard GB / T 2410-2008 "Determination of Light Transmittance and Haze of Transparent Plastics"; the peel strength of the film was tested according to GB / T 31849-2015 "Automotive Window Tinting"; the tensile strength of the film was tested according to GB / T1040.3-2006 "Determination of Tensile Properties of Plastics Part 3: Test Conditions for Films and Sheets"; and the ultraviolet blocking rate and infrared blocking rate of the film were detected using a solar film tester. These test results are shown in Table 2.

[0047] Table 2 Test results of thin film properties

[0048] In Table 2, higher light transmittance means stronger light transmission through the film, resulting in more ample interior lighting; typically, it should be above 70%. Haze refers to the degree of cloud-like appearance caused by light scattering when passing through the window film; a lower haze value means higher transparency and clarity of the film, typically below 1%. Higher peel strength indicates stronger adhesion between the film and glass, making it less prone to detachment. Higher tensile strength indicates better explosion-proof performance of the film. Higher UV / IR blocking rate indicates better shielding against ultraviolet light and infrared light.

[0049] As can be seen from the results in Table 2, both the embodiments and comparative examples of the present invention exhibit good UV shielding and infrared blocking performance. This is because the reflective absorption layer slurry components possess excellent UV absorption and infrared blocking properties. Comparative Example 2, without SiO2 aerogel and with modified SiO2 aerogel, has the highest transmittance and haze. However, the transmittance and haze of Examples 1 and 2 show only a slight decrease and meet the standards. Comparative Example 1 has the worst transmittance and haze, which is attributed to the excellent dispersion of the superhydrophobic, high specific surface area modified SiO2 aerogel in the surface layer and adhesive layer. Furthermore, the films of Examples 1 and 2 exhibit higher peel strength and tensile strength. This is because the modified SiO2 aerogel is well dispersed in polymethyl methacrylate (PMMA) and PMMA, providing excellent rigid filling and significantly improving the mechanical strength of the film.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-transmittance, explosion-proof film for automotive windows, comprising, from bottom to top, a release film, an adhesive layer, a polyester film, a reflective absorption layer, and a surface layer, characterized in that, The surface layer material comprises, by weight, 2-5 parts modified SiO2 aerogel, 0.5-1 part leveling agent, 10-20 parts adhesive resin, and 70-80 parts solvent. The adhesive layer comprises, by weight, 90-100 parts adhesive resin and 0.5-2 parts modified SiO2 aerogel; The preparation method of the modified SiO2 aerogel includes, by weight, the following: Mix 15-25 parts of methyltrimethoxysilane and 10-15 parts of ethanol, then add 50-80 parts of water and 2-5 parts of 0.1-0.5 mol / L hydrochloric acid, and heat and stir to obtain the reaction intermediate. Mix 5-10 parts of phenyltrimethoxysilane, 2-5 parts of ethanol, 20-30 parts of water, and 1-3 parts of 0.1-0.5 mol / L hydrochloric acid. Then add 3-7 parts of reaction intermediate and 0.2-0.5 parts of tetrapropylammonium hydroxide, stir and react, and then age to obtain modified SiO2 aerogel. When adding tetrapropylammonium hydroxide, tetra(triethanolamine)zirconium is also added in an amount equal to 0.1 to 0.3 times the mass of phenyltrimethoxysilane.

2. The high-transmittance, explosion-proof film for automotive windows according to claim 1, characterized in that, The material of the reflective absorption layer, by weight, includes 5-10 parts infrared reflective powder, 5-10 parts ultraviolet absorber powder, 1-3 parts metal powder, 10-20 parts binder resin, 70-80 parts solvent, and 1-3 parts dispersant.

3. The high-transmittance, explosion-proof film for automotive windows according to claim 2, characterized in that, The infrared reflective powder includes at least one of antimony tin oxide and indium tin oxide with a mesh size of 500-1500. The ultraviolet absorbing powder includes at least one of zinc oxide, titanium dioxide, and cerium dioxide with a mesh size of 1000-3000 mesh; The metal powder includes at least one of vanadium, aluminum, copper, and tungsten with a particle size of 10-100 nm. The solvent includes at least one of ethyl acetate, butyl acetate, acetone, and butanone; The dispersant includes at least one of sodium tripolyphosphate, sodium hexametaphosphate, triethylhexylphosphate, polyacrylamide, and methylpentanol.

4. The high-transmittance, explosion-proof film for automotive windows according to claim 1, characterized in that, The adhesive resin includes at least one of polymethyl methacrylate, polyurethane, and polyacrylate.

5. The high-transmittance, explosion-proof film for automotive windows according to claim 1, characterized in that, The thicknesses of the reflective absorption layer and the surface layer are 10~20μm and 5~10μm, respectively.

6. The high-transmittance, explosion-proof film for automotive windows according to claim 1, characterized in that, The thickness of the adhesive layer is 5~15μm.

7. The high-transmittance, explosion-proof film for automotive windows according to claim 1, characterized in that, The thickness of the polyester film is 10~30μm.

8. A method for preparing a high-transmittance, explosion-proof film for automotive windows as described in any one of claims 1 to 7, characterized in that, include, A reflective absorption layer and a surface layer are sequentially prepared on one side of the polyester film; An adhesive layer is prepared on the other side of the polyester film, and the adhesive layer is bonded to the release film to obtain a high-transmittance explosion-proof film for automotive windows.

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