A silver-plated reflective film and a method for manufacturing the same

Abstract

The application discloses a silver-plated reflective film and a preparation method thereof, and belongs to the field of film coating. The silver-plated reflective film comprises a film material, a primer layer, a silver-plated layer and a top coating layer arranged in sequence, the primer layer is formed by curing a primer, and the top coating layer is formed by curing a top coating agent; the primer comprises a first resin coating agent and a surface energy aid, the surface energy aid comprises one or more of polyether macromonomer modified polyacrylate, polyether macromonomer and organic silicon macromolecule modified polyacrylate and polyether macromonomer and organic silicon small molecule modified polyacrylate; and the top coating agent comprises a second resin coating agent, an anti-etching agent and inorganic nano-particles. The application has the effect of further improving the adhesion of the silver layer, thereby improving the optical performance and service life of the silver-plated reflective film.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coating, in particular to a silver-coated reflective film and a preparation method thereof. BACKGROUND

[0002] The silver-coated reflective film can be widely applied in the fields of solar energy, lighting and display. For example, the silver-coated reflective film can be used as a solar reflector to reflect sunlight onto a solar panel, and the good reflectivity of the silver-coated reflective film can increase the amount of light received by the solar panel and improve the photoelectric conversion efficiency.

[0003] Generally, the silver-coated reflective film is obtained by evaporating a silver layer on the surface of a film. Since the adhesion of silver deposited on a plastic film material such as PET is low, a primer layer is usually coated on the surface of the film before silver coating to promote the deposition of the silver layer. The primer layer is usually a resin coating such as polyurethane or acrylate.

[0004] However, it is found in practical application that the adhesion of the silver layer to the primer layer is limited, and interlayer peeling occurs under bending or dynamic stress, resulting in degradation of optical performance. SUMMARY

[0005] To further improve the adhesion of the silver layer, the present application provides a silver-coated reflective film and a preparation method thereof.

[0006] In a first aspect, the present application provides a silver-coated reflective film using the following technical solution:

[0007] The silver-coated reflective film comprises a film material, a primer layer, a silver-coated layer and a topcoat layer arranged in sequence, the primer layer is formed by curing a primer agent, and the topcoat layer is formed by curing a topcoat agent;

[0008] The primer agent comprises a first resin coating and a surface energy aid, and the surface energy aid comprises one or more of polyether macromonomer modified polyacrylate, polyether macromonomer and organic silicon macromolecule modified polyacrylate, and polyether macromonomer and organic silicon small molecule modified polyacrylate;

[0009] The topcoat agent comprises a second resin coating, a corrosion inhibitor and inorganic nanoparticles.

[0010] By adopting the technical scheme, the surface energy aid is contained in the primer, the polyacrylate provides excellent leveling performance, and the modification of the polyether macromonomer can improve the polar force part in the surface energy of the cured coating system, thereby improving the surface energy, the surface energy can be improved to above 50 dynes, thereby facilitating the formation of a dense, uniform and even silver atom deposition film layer during silver plating, improving the reflectivity and uniformity, and the high surface energy also helps to increase the adhesion between the silver plating layer and the primer layer, and improve the mechanical properties of the silver plating reflective film.

[0011] The top coating agent contains an anticorrosive agent and inorganic nanoparticles, the anticorrosive agent forms a passivation protective film with the surface atoms of the silver layer, and the inorganic nanoparticles enable the small voids of the top coating layer to be filled to some extent, effectively hinder the gas from passing through the top coating layer, and reduce the reaction between the silver atoms and the external gas, thereby improving the environmental tolerance and service life of the silver plating reflective film under the combined action of multiple mechanisms.

[0012] Optionally, in the primer, the mass ratio of the first resin coating to the surface energy aid is 100:(1-5); optionally, in the top coating agent, the mass ratio of the second resin coating, the anticorrosive agent and the inorganic nanoparticles is 100:(0.1-2):(1-5).

[0013] By adopting the technical scheme, the required amounts of the surface energy aid, the anticorrosive agent and the inorganic nanoparticles are small, and the anticorrosive agent has obvious protection effect although the amount thereof is small.

[0014] Optionally, the surface energy aid includes polyether macromonomer modified polyacrylate, polyether macromonomer and organic silicon macromonomer modified polyacrylate, and polyether macromonomer and organic silicon small molecule monomer modified polyacrylate in a mass ratio of 1:(0.2-0.3):(0.55-0.7).

[0015] By adopting the technical scheme, the organic silicon modification is combined on the basis of the polyether macromonomer modification, the organic silicon modification causes appropriate incompatibility in the system, promotes the directional migration of the surface energy aid to the surface of the primer layer, and drives the polyether macromolecular branched chain to migrate to the gas / liquid layer interface, thereby further improving the surface energy of the primer layer, facilitating the adhesion of the silver plating layer, and improving the optical properties, mechanical properties and service life of the silver plating reflective film.

[0016] Optionally, the polyether macromonomer is a hyperbranched polyether; the organic silicon macromonomer is hydrogen-containing silicone oil; and the organic silicon small molecule monomer is a silane coupling agent.

[0017] By adopting the technical scheme, the hyperbranched polyether is in a macromolecular structure, which can improve fluidity and further improve the directional migration of the gas / liquid interface; the hydrogen-containing silicone oil is in a macromolecular structure, and the silane coupling agent is in a small molecular structure, and the two kinds of silicone structures can make the incompatibility in the system in a proper range, and keep the stability of the primer coating.

[0018] Optionally, the polyether macromonomer modified polyacrylate is obtained by reacting trimethylolpropane tri-3-mercaptopropionate with epoxy acrylate, and then reacting with a hydroxyl-containing polyacrylate.

[0019] Optionally, the polyether macromonomer and silicone macromonomer modified polyacrylate is obtained by reacting trimethylolpropane tri-3-mercaptopropionate with epoxy acrylate, then reacting with hydrogen-containing silicone oil, and then reacting with a hydroxyl-containing polyacrylate.

[0020] Optionally, the polyether macromonomer and silicone macromonomer modified polyacrylate is obtained by reacting trimethylolpropane tri-3-mercaptopropionate with epoxy acrylate, then reacting with hydrogen-containing silicone oil, and then reacting with a hydroxyl-containing polyacrylate.

[0021] Optionally, the corrosion inhibitor includes one or more of phosphite, polyphosphate thiosulfate and mercaptobenzothiazole derivatives.

[0022] By adopting the technical scheme, the above-mentioned substances can be used as corrosion inhibitors, preferentially adsorbed on silver active sites, and chelated with silver to form a dense passivation film, effectively preventing water, oxygen and sulfur and other corrosive media from reacting with the silver layer surface.

[0023] Taking 1-phenyl-5-mercapto tetrazole as an example, the phenyl group of this corrosion inhibitor has strong hydrophobicity. Both of its two nitrogen atoms and one mercapto negative ion can coordinate with silver ions to form a dense complex film Ag-PMTA, which can effectively prevent corrosive media from reacting with the silver surface.

[0024] Optionally, the inorganic nanoparticles include one or more of nanometer titanium dioxide, nanometer silicon dioxide, nanometer zirconium dioxide and nanometer mica sheet.

[0025] By adopting the technical scheme, the above-mentioned inorganic nanoparticles have good filling effect, can be filled into the voids inside the top coating, thereby improving the protection of the top coating on the silver plating layer, and in addition, the top coating enhances the stability of the structure of the silver plating reflective film.

[0026] Optionally, the first resin coating and the second resin coating are one or more of polyurethane coating, acrylate coating and epoxy coating.

[0027] Optionally, the film material comprises one of PET film, PBT film, PP film and PE film.

[0028] In a second aspect, the application provides a preparation method of silver-plated reflective film, which adopts the following technical scheme:

[0029] A preparation method of silver-plated reflective film comprises the following steps:

[0030] The primer is coated on the surface of the film material, and the primer layer is obtained after baking and curing;

[0031] The silver is vacuum evaporated on the primer layer to obtain a silver-plated layer;

[0032] The topcoat is coated on the silver-plated layer, and the topcoat layer is obtained after baking and curing, thereby completing the preparation of the silver-plated reflective film.

[0033] By adopting the above technical scheme, the adhesion of the silver-plated layer to the primer layer is improved after the primer layer is cured, and the uniformity of the silver-plated layer is more uniform, which helps to improve the optical performance and service life of the silver-plated reflective film.

[0034] Optionally, the thickness of the silver-plated layer is 80-90 nm, and the square resistance is 0.1-0.2 Ω / .

[0035] In summary, the application has the following beneficial effects:

[0036] 1. The primer of the application contains a surface energy aid, polyacrylate provides excellent leveling performance, and the modification of polyether macromonomer can improve the polarity part of the surface energy of the cured coating system, thereby improving the surface energy, which can be increased to more than 50 dynes, thereby facilitating the formation of a dense, uniform and uniform silver atom deposition film layer during silver plating, improving the reflectivity and uniformity, and the high surface energy also helps to increase the adhesion between the silver-plated layer and the primer layer, thereby improving the mechanical properties of the silver-plated reflective film; the topcoat contains an anticorrosive agent and inorganic nanoparticles, the anticorrosive agent forms a passivation protective film with the surface atoms of the silver layer, and the inorganic nanoparticles fill the small voids of the topcoat layer to effectively prevent gas from passing through the topcoat layer, thereby reducing the reaction between silver atoms and external gas, thereby improving the environmental tolerance and service life of the silver-plated reflective film under the combined action of multiple mechanisms.

[0037] 2. The polyether macromonomer in the surface energy aid is modified with silicone, which produces appropriate incompatibility in the system, promotes the directional migration of the surface energy aid to the surface of the primer layer, and drives the polyether macromolecular branched chain to migrate to the gas / liquid interface, thereby further improving the surface energy of the primer layer, which is beneficial to the adhesion of the silver-plated layer, and improves the optical performance, mechanical properties and service life of the silver-plated reflective film. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a sectional view of the silver-coated reflective film of the present application.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 1, film material; 2, primer layer; 3, silver-coated layer; 4, top coat layer. DETAILED DESCRIPTION

[0041] The following will be described in detail with reference to the accompanying drawings. Figure 1 The present application will be described in further detail.

[0042] Preparation Example

[0043] Preparation method of polyacrylate:

[0044] According to the molar ratio of 1:1.5:0.2, ethyl acrylate, methyl methacrylate, and hydroxyethyl methacrylate were taken, and according to 4% of the total mass of the above three acrylates, benzoyl peroxide was taken, and according to 2 times the total mass of the above three acrylates, ethanol was taken.

[0045] Under the protection of nitrogen, ethyl acrylate, methyl methacrylate, hydroxyethyl methacrylate and ethanol were stirred and mixed uniformly, and the temperature was raised to 65°C. Benzoyl peroxide was gradually added, and the addition of benzoyl peroxide was completed in 30 min. Continuous stirring reaction was carried out for 2h, and polyacrylate was prepared.

[0046] Preparation Example 1

[0047] Preparation method of polyether macromonomer modified polyacrylate:

[0048] According to the molar ratio of 1:1, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were taken, and according to 0.5% of the total mass of the above two raw materials, DBU catalyst was taken, and according to 2 times the total mass of the above two raw materials, polyacrylate prepared in the preparation example was taken.

[0049] Under the protection of nitrogen, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were dissolved in DMF solvent, DBU catalyst was added, and after uniform mixing, it was heated to 45°C and reacted for 3h. After the reaction was completed, the DMF solvent was removed by reduced pressure distillation to obtain a polyether macromonomer with hyperbranched structure.

[0050] According to 1% of the total mass of the above polyether macromonomer, DMP-30 promoter was taken.

[0051] The polyether macromonomer, polyacrylate and DMP-30 promoter were mixed, and the temperature was raised to 65°C. Continuous stirring reaction was carried out for 2h, and polyether macromonomer modified polyacrylate was prepared.

[0052] Preparation Example 2

[0053] Method for preparing polyether macromonomer and silicone macromonomer modified polyacrylate:

[0054] According to the molar ratio of 1:1, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were taken respectively, and DBU catalyst was taken according to 0.5% of the total mass of the above two raw materials, and the polyacrylate prepared in the preparation example was taken according to 2 times of the total mass of the above two raw materials.

[0055] Under the protection of nitrogen, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were dissolved in DMF solvent, DBU catalyst was added, and after mixing uniformly, it was heated to 45℃, and reacted for 3h. After the reaction was completed, the DMF solvent was removed by reduced pressure distillation to obtain a polyether macromonomer with hyperbranched structure.

[0056] According to 30% and 0.02% of the total mass of the above polyether macromonomer, hydrogen-containing silicone oil and chloroplatinic acid catalyst were taken, the molecular weight of the hydrogen-containing silicone oil was 2000, and the hydrogen content was 1.2%.

[0057] The polyether macromonomer was mixed with hydrogen-containing silicone oil, chloroplatinic acid catalyst was added, heated to 85℃, and reacted for 5h to obtain a silicone macromolecule grafted polyether macromonomer.

[0058] According to 1% of the total mass of the above silicone macromolecule grafted polyether macromonomer, DMP-30 promoter was taken.

[0059] The silicone macromolecule grafted polyether macromonomer, polyacrylate and DMP-30 promoter were mixed, heated to 65℃, and continuously stirred for 2h to prepare a polyether macromonomer and silicone macromonomer modified polyacrylate.

[0060] Preparation Example 3

[0061] Method for preparing polyether macromonomer and silicone macromonomer modified polyacrylate:

[0062] According to the molar ratio of 1:1, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were taken respectively, and DBU catalyst was taken according to 0.5% of the total mass of the above two raw materials, and the polyacrylate prepared in the preparation example was taken according to 2 times of the total mass of the above two raw materials.

[0063] Under the protection of nitrogen, trimethylolpropane tri-3-mercaptopropionate and glycidyl methacrylate were dissolved in DMF solvent, DBU catalyst was added, and after mixing uniformly, it was heated to 45℃, and reacted for 3h. After the reaction was completed, the DMF solvent was removed by reduced pressure distillation to obtain a polyether macromonomer with hyperbranched structure.

[0064] Take γ-aminopropyl triethoxysilane according to 10% of the total mass of the polyether macromonomer, and take DMP-30 promoter according to 1% of the total mass of the polyether macromonomer.

[0065] Add γ-aminopropyl triethoxysilane to the polyacrylate, heat to 65°C, continuously stir for 1h, then add the polyether macromonomer and the DMP-30 promoter for mixing, continuously stir for 2h, and prepare the polyacrylate modified by the polyether macromonomer and the small-molecule organic silicon monomer.

[0066] Example 1

[0067] A method for preparing a silver-plated reflective film, comprising the following steps:

[0068] Mix the first resin coating and the surface energy aid uniformly to obtain a primer, the mass ratio of the first resin coating and the surface energy aid is 100:1, the first resin coating can be selected from the PET coating water-based polyurethane resin of GSB company, model GSB-DT-H3, and the surface energy aid is the polyacrylate modified by the polyether macromonomer prepared in Preparation Example 1.

[0069] Mix the second resin coating, the resist, and the inorganic nano-particles uniformly to obtain a top coating, the mass ratio of the second resin coating, the resist, and the inorganic nano-particles is 100:0.1:1, the second resin coating can be selected from the water-based polyurethane varnish of Ongel company, model PUD-107A, the resist can be selected from 1-phenyl-5-mercapto tetrazole, and the inorganic nano-particles can be selected from nano-silicon dioxide with a particle size of 60-80nm.

[0070] Coat the primer on the surface of the film material 1, the film material is specifically a PET film, the wet film thickness is 3um, 100°C drying for 20s, then 60°C curing for 48h, to obtain the primer layer 2.

[0071] Vacuum deposit silver on the primer layer 2, the vacuum degree is required to be below 3E-3Pa, to obtain the silver-plated layer 3, the thickness of the silver-plated layer 3 is 80-90nm, and the square resistance is 0.1-0.2Ω / □.

[0072] Coat the top coating on the silver-plated layer 3, the wet film thickness is 3um, 100°C drying for 20s, then 60°C curing for 48h, to obtain the top coating layer 4, and the preparation of the silver-plated reflective film is completed.

[0073] Example 2

[0074] A method for preparing a silver-plated reflective film, comprising the following steps:

[0075] The first resin coating is mixed with the surface energy assistant to obtain a primer, the mass ratio of the first resin coating to the surface energy assistant is 100:5, the first resin coating can be GSB-DT-H3 of GSB company, and the surface energy assistant is the polyether macromonomer modified polyacrylate prepared in Preparation Example 1.

[0076] The second resin coating is mixed with the resist and inorganic nanoparticles to obtain a top coating, the mass ratio of the second resin coating, the resist and the inorganic nanoparticles is 100:2:5, the second resin coating can be PUD-107A of Oike company, the resist can be 1-phenyl-5-mercapto tetrazole, and the inorganic nanoparticles can be nano-silica with a particle size of 60-80 nm.

[0077] The primer is coated on the surface of the film material 1, the film material is a PET film, the wet film thickness is 3 um, the film is dried at 100 DEG C for 20 s, and then is aged at 60 DEG C for 48 h to obtain the primer layer 2.

[0078] The silver is vacuum evaporated on the primer layer 2 to obtain the silver plating layer 3, the vacuum degree is required to be below 3E-3 Pa, the thickness of the silver plating layer 3 is 80-90 nm, and the square resistance is 0.1-0.2 Ω / .

[0079] The top coating is coated on the silver plating layer 3, the wet film thickness is 3 um, the film is dried at 100 DEG C for 20 s, and then is aged at 60 DEG C for 48 h to obtain the top coating layer 4, and the preparation of the silver plating reflective film is completed, as shown in Figure 1 .

[0080] Example 3

[0081] A preparation method of a silver plating reflective film, which is different from example 1 in that the surface energy assistant is the polyether macromonomer and the organic silicon macromonomer modified polyacrylate prepared in Preparation Example 2.

[0082] Example 4

[0083] A preparation method of a silver plating reflective film, which is different from example 1 in that the surface energy assistant is the polyether macromonomer and the organic silicon macromonomer modified polyacrylate prepared in Preparation Example 2.

[0084] Example 5

[0085] A preparation method of a silver plating reflective film, which is different from example 1 in that the surface energy assistant is the polyether macromonomer and the organic silicon macromonomer modified polyacrylate prepared in Preparation Example 2 and the polyether macromonomer and the organic silicon macromonomer modified polyacrylate prepared in Preparation Example 3 are compounded according to a mass ratio of 2:7.

[0086] Example 6

[0087] A method for preparing a silver-plated reflective film differs from Example 1 in that the surface energy additive is a compound of polyether macromonomer modified polyacrylate of Preparation Example 1, polyether macromonomer and organosilicon macromonomer modified polyacrylate of Preparation Example 2, and polyether macromonomer and organosilicon small molecule monomer modified polyacrylate of Preparation Example 3 in a mass ratio of 1:0.2:0.7.

[0088] Example 7

[0089] The method for preparing a silver-plated reflective film differs from Example 1 in that the surface energy additive is a mixture of polyether macromonomer-modified polyacrylate of Example 1, polyether macromonomer and organosilicon macromonomer-modified polyacrylate of Example 2, and polyether macromonomer and organosilicon small molecule monomer-modified polyacrylate of Example 3 in a mass ratio of 1:0.3:0.55.

[0090] Comparative Example 1

[0091] A method for preparing a silver-plated reflective film differs from Example 1 in that the primer does not contain surface energy additives.

[0092] Comparative Example 2

[0093] A method for preparing a silver-plated reflective film differs from Example 1 in that the surface coating does not contain inorganic nanoparticles.

[0094] Performance testing

[0095] Average reflectance: A silver-plated reflective film sample with a 5-inch screen size was taken, and 9 points were evenly selected on the sample. The reflectance of the 9 points was measured at a wavelength of 550nm, and the average value was taken as the result. The test equipment was a TS20 spectrophotometer.

[0096] Reflection uniformity: The uniformity of reflectance measured at the 9 points above is calculated using the standard deviation method. Specifically, the standard deviation formula is: σ=√[∑(Ti-Mean)] 2 / N]. Where σ represents the dispersion of the data distribution, i.e., the standard deviation; N is the total number of data points; Ti is the number of data points. The formula represents the reflectance values ​​of i data points, with Mean being the average of all data points. It quantifies the dispersion of the data by calculating the average of the sum of squared differences between each data point and the mean, thus assessing the uniformity of the data.

[0097] Bending cycle resistance: The silver-plated film was cut into 15mm×100mm pieces and tested using a PY-D608D flexible material bending life tester. The parameters were set as follows: bending radius 3mm, frequency 0.5Hz, bending angle 90°, and the number of cycles was recorded.

[0098] Humidity and heat resistance test: take silver plating reflective film sample with 5-inch screen as size, put into constant temperature box, at 65℃, 95% RH for 240h, take out sample, and stand for balance at room temperature for 24h, calculate the difference of 9-point average reflectivity change before and after humidity and heat resistance test ΔR. The average reflectivity test method is the same as above.

[0099] The above test results are shown in Table 1.

[0100] Table 1

[0101]

[0102] It can be seen from Table 1 that compared with the primer agent not containing surface energy aid, the primer agent added with surface energy aid makes the average reflectivity and reflectivity uniformity of silver plating reflective film higher, showing good optical performance, and the number of bending cycles is better, and the humidity and heat resistance is also better, proving that the environmental tolerance and service life of silver plating reflective film are improved.

[0103] Further combining Example 1 with Examples 3-4, it can be seen that compared with a single certain modified polyacrylate, the surface energy aid can improve the optical performance, environmental tolerance and service life of silver plating reflective film when polyether macromonomer modified polyacrylate, polyether macromonomer and silicone macromolecule modified polyacrylate, and polyether macromonomer and silicone small molecule modified polyacrylate are selected.

[0104] Further combining Examples 1-5 with Examples 6-7, it can be seen that when the surface energy aid is polyether macromonomer modified polyacrylate, polyether macromonomer and silicone macromolecule modified polyacrylate, and polyether macromonomer and silicone small molecule modified polyacrylate, the environmental tolerance and bending resistance of silver plating reflective film can be further improved, and the comprehensive performance is better.

[0105] In addition, compared with the surface coating agent not containing inorganic nanoparticles, the surface coating agent added with inorganic nanoparticles makes the humidity and heat resistance of silver plating reflective film greatly, which helps to improve the environmental tolerance and service life of silver plating reflective film.

[0106] The specific embodiment is only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make modifications to the specific embodiment without creative contribution after reading the present specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A silver-plated reflective film, characterized in that: It includes a film material, a base coating layer, a silver plating layer and a top coating layer arranged in sequence, wherein the base coating layer is formed by curing a primer and the top coating layer is formed by curing a top coating agent; The primer comprises a first resin coating and a surface energy additive, wherein the surface energy additive comprises one or more of the following: polyether macromonomer modified polyacrylate, polyether macromonomer and organosilicon macromonomer modified polyacrylate, and polyether macromonomer and organosilicon small molecule modified polyacrylate. The topcoat comprises a second resin coating, a corrosion inhibitor, and inorganic nanoparticles.

2. The silver-plated reflective film according to claim 1, characterized in that: In the primer, the mass ratio of the first resin coating to the surface energy additive is 100:(1~5); In the topcoat, the mass ratio of the second resin coating, the resist, and the inorganic nanoparticles is 100:(0.1~2):(1~5).

3. The silver-plated reflective film according to claim 1, characterized in that: The surface energy additives include polyether macromonomer-modified polyacrylate, polyether macromonomer-and organosilicon macromonomer-modified polyacrylate, and polyether macromonomer-and organosilicon small molecule monomer-modified polyacrylate in a mass ratio of 1:(0.2~0.3):(0.55~0.7).

4. The silver-plated reflective film according to claim 3, characterized in that: The polyether macromonomer is a hyperbranched polyether; the organosilicon macromonomer is a hydrogen-containing silicone oil; and the organosilicon small molecule monomer is a silane coupling agent.

5. The silver-plated reflective film according to claim 1, characterized in that: The corrosion inhibitor includes one or more of phosphites, polyphosphate thiosulfates, and mercaptobenzothiazole derivatives.

6. The silver-plated reflective film according to claim 1, characterized in that: The inorganic nanoparticles include one or more of nano-titanium dioxide, nano-silica, nano-zirconium dioxide, and nano-mica sheets.

7. The silver-plated reflective film according to claim 1, characterized in that: The first resin coating and the second resin coating are both one or more of polyurethane coatings, acrylic coatings and epoxy coatings.

8. The silver-plated reflective film according to claim 1, characterized in that: The membrane material includes one of PET film, PBT film, PP film and PE film.

9. A method for preparing a silver-plated reflective film according to any one of claims 1-8, characterized in that: Includes the following steps: A primer is applied to the surface of the membrane material, dried, and then cured to obtain a primer coating. Silver is vacuum-deposited onto the base coating to obtain a silver plating layer. A topcoat is applied to the silver-plated layer, dried, and then cured to obtain the topcoat layer, thus completing the preparation of the silver-plated reflective film.

10. The method for preparing a silver-plated reflective film according to claim 9, characterized in that: The thickness of the silver plating layer is 80~90nm, and the sheet resistance is 0.1~0.2Ω / □.

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