Radiation-proof plastic-removing film and preparation method thereof

Abstract

The application discloses an anti-radiation plastic-removing film and a preparation method thereof. The anti-radiation plastic-removing film comprises a base film and a functional coating film, and the functional coating film is prepared from the following raw materials in parts by weight: 60-70 parts of a thermoplastic acrylic resin, 25-35 parts of ethyl acetate, 0.5-1.1 parts of a wetting dispersant, and 2-6 parts of antimony-doped tin oxide. The plastic-removing film has good anti-radiation performance.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of anti-radiation plastic removal film and preparation method thereof. BACKGROUND

[0002] The anti-radiation plastic removal film belongs to a kind of polymer film with anti-radiation property. TPU film, i.e. thermoplastic polyurethane, is a kind of polymer material with excellent mechanical properties and processing properties, widely used in multiple fields such as medical, automotive and electronic products. However, the existing TPU film may not effectively shield the radiation generated by electronic devices.

[0003] With the development of science and technology and people's attention to health, the demand for polymer films capable of shielding radiation is increasing. For most users, how to endow the TPU film with anti-radiation function while maintaining its excellent performance is an urgent problem to be solved. Generally speaking, the anti-radiation materials on the market at present are mainly metal-based. Although these materials can effectively shield radiation, they are often heavy, high in cost, and lack good flexibility and transparency.

[0004] Some existing research and development have tried to dope different fillers, such as metal powder or special inorganic compounds, into TPU film to endow it with anti-radiation function. However, these methods may affect the mechanical properties, transparency and processing properties of TPU film, and the doped components may precipitate from the film under certain conditions, affecting the safety of use.

[0005] Therefore, it has become an important goal for scientific research and industrial application to develop an anti-radiation plastic removal film with good anti-radiation performance without affecting the performance of the original TPU film. SUMMARY

[0006] The technical problem to be solved by the present application is to provide an anti-radiation plastic removal film and a preparation method thereof.

[0007] Specifically, the technical solution of the present application is:

[0008] The present application provides an anti-radiation plastic removal film, comprising a base film and a functional coating film, the functional coating film is prepared from the following weight parts of raw materials:

[0009] 60-70 parts of thermoplastic acrylic resin;

[0010] 25-35 parts of ethyl acetate;

[0011] 0.5-1.1 parts of wet dispersant;

[0012] 2-6 parts of antimony-doped tin oxide.

[0013] The application discloses a preparation method of the anti-radiation post-mold film.

[0014] The thermoplastic acrylic resin, ethyl acetate and wetting dispersant are stirred uniformly;

[0015] The antimony-doped tin oxide is further added and stirred uniformly to obtain the functional coating film;

[0016] The functional coating film is uniformly coated on the base film and dried.

[0017] Preferably, the functional coating film is prepared from the following raw materials by weight:

[0018] 60-70 parts of the thermoplastic acrylic resin;

[0019] 25-35 parts of the ethyl acetate;

[0020] 0.5-1.1 parts of the wetting dispersant;

[0021] 2-6 parts of the coupling agent modified antimony-doped tin oxide.

[0022] Preferably, the coupling agent modified antimony-doped tin oxide is prepared by modifying the antimony-doped tin oxide with the coupling agent.

[0023] Preferably, the mass ratio of the coupling agent to the antimony-doped tin oxide is (5-10):100.

[0024] Preferably, the coupling agent modified antimony-doped tin oxide is prepared by uniformly mixing the coupling agent and the antimony-doped tin oxide. Preferably, the coupling agent and the antimony-doped tin oxide are uniformly mixed in a ball milling mode.

[0025] Preferably, the coupling agent is a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, an organic chromium complex coupling agent or a zirconium compound coupling agent.

[0026] Preferably, the coupling agent is at least one of vinyltriethoxysilane, gamma-glycidoxypropylmethyldiethoxysilane, vinyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-chloropropyltriethoxysilane (CAS No.: 5089-70-3), vinyltris(beta-methoxyethoxy)silane, gamma-aminopropyltriethoxysilane (silane coupling agent KH-550), vinyltris-tert-butylperoxy silane, isopropyl tri(dioctylpyrophosphato) titanate, isopropyl tri(dioctylphosphato) titanate (CAS No.: 65345-34-8), isopropyl dioleato(dioctylphosphato) titanate, monoalkoxy unsaturated fatty acid titanate, bis(dioctyloxyphosphato) ethylene titanate, aminopropyltriethoxysilane, gamma-mercaptopropyltrimethoxysilane (CAS: 4420-74-0), acryloxypropyltrimethoxysilane, vinyltrimethoxysilane, vinyltris(beta-methoxyethoxy)silane, N-beta-(aminoethyl)-gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropylmethyldiethoxysilane, gamma-chloropropyltriethoxysilane, vinyltris-tert-butylperoxy silane, vinyltrichlorosilane, vinyltrimethoxysilane, phenylaminopropyltrimethoxysilane, gamma-isocyanatopropyltriethoxysilane, DL-411 type aluminate coupling agent, DL-482 type aluminate coupling agent, RCA aluminate coupling agent, CHY-501 aluminate coupling agent, tetra-n-propyl zirconate (CAS No.: 23519-77-9), and chromium methacrylate.

[0027] Further preferably, the coupling agent is tetra-n-propyl zirconate.

[0028] The application discloses a preparation method of the anti-radiation plastic-removing film.

[0029] The thermoplastic acrylic resin, ethyl acetate and wetting dispersant are uniformly stirred;

[0030] The coupling agent is added to modify the antimony-doped tin oxide, and the functional coating film is obtained after uniform stirring.

[0031] The functional coating film is uniformly coated on the base film and dried.

[0032] The application improves the anti-radiation performance of the film layer by using the antimony-doped tin oxide, and further improves the anti-radiation performance of the film layer by modifying the antimony-doped tin oxide with the coupling agent. DETAILED DESCRIPTION

[0033] The anti-radiation plastic-removing film (i.e., anti-radiation TPU film) comprises a base film and a functional coating film, and the functional coating film is prepared from the following raw materials in parts by weight:

[0034] 60-70 parts of thermoplastic acrylic resin;

[0035] 25-35 parts of ethyl acetate;

[0036] 0.5-1.1 parts of wetting dispersant;

[0037] 2-6 parts of antimony-doped tin oxide.

[0038] Thermoplastic acrylic resin is a polymer that can be formed into shapes through thermal processing. It can be made into films or other shapes through methods such as coating, blow molding, injection molding, etc. In the radiation-proof plastic removal film of the present invention, thermoplastic acrylic resin mainly serves as the film-forming material, forming the main structure of the film. Ethyl acetate is an organic solvent used to adjust the viscosity of the coating and optimize the coating process. It helps the resin distribute evenly during the coating process and quickly evaporate after the coating solidifies, avoiding leaving residues. The role of the wetting dispersant is to improve the wettability and spreadability of the coating on the substrate, ensuring uniform and bubble-free film coating. It can reduce the surface tension of the liquid and enhance the adhesion of the coating to the substrate. Antimony-doped tin oxide is a conductive oxide that can absorb and scatter electromagnetic waves, achieving the effect of shielding radiation. In the radiation-proof plastic removal film of the present invention, it is the key component that plays a functional role.

[0039] Meanwhile, the present invention discloses a preparation method of the radiation-proof plastic removal film, comprising the following steps:

[0040] Stir the thermoplastic acrylic resin, ethyl acetate, and wetting dispersant evenly;

[0041] Add antimony-doped tin oxide and stir evenly to obtain a functional coating film;

[0042] Uniformly coat the functional coating film on the base film and dry it.

[0043] Preferably, the functional coating film is prepared from the following weight parts of raw materials:

[0044] 60-70 parts of thermoplastic acrylic resin;

[0045] 25-35 parts of ethyl acetate;

[0046] 0.5-1.1 parts of wetting dispersant;

[0047] 2-6 parts of coupling agent-modified antimony-doped tin oxide.

[0048] Preferably, the coupling agent modified antimony-doped tin oxide is prepared by mixing the coupling agent with the antimony-doped tin oxide. The mass ratio of the coupling agent to the antimony-doped tin oxide is (5-10):100. The coupling agent modified antimony-doped tin oxide is prepared by mixing the coupling agent with the antimony-doped tin oxide. Preferably, the coupling agent and the antimony-doped tin oxide are mixed uniformly by ball milling.

[0049] The coupling agent modified antimony-doped tin oxide can be better mixed with the thermoplastic acrylic resin and other organic ingredients, improving the compatibility between raw materials, ensuring uniform dispersion of the antimony-doped tin oxide, and avoiding aggregation, thereby improving the performance and quality of the coating film. At the same time, the antimony-doped tin oxide is an effective radiation shielding material, and through the modification of the coupling agent, the antimony-doped tin oxide can be better integrated into the TPU film, thereby enhancing the radiation shielding performance of the film.

[0050] Preferably, the coupling agent is at least one of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, an organic chromium complex coupling agent, or a zirconium compound coupling agent.

[0051] Preferably, the coupling agent is at least one of vinyltriethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, vinyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-chloropropyltriethoxysilane (CAS No.: 5089-70-3), vinyltris(β-methoxyethoxy)silane, γ-aminopropyltriethoxysilane (silane coupling agent KH-550), vinyltris-tert-butylperoxy silane, isopropyl tri(dioctyl pyrophosphato)titanate, isopropyl tri(dioctyl phosphato)titanate (CAS No.: 65345-34-8), isopropyl di-oleato(dioctyl phosphato)titanate, monoalkoxy unsaturated fatty acid titanate, bis(dioctyloxy pyrophosphato) ethylene titanate, aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane (CAS 4420-74-0), acryloxypropyltrimethoxysilane, vinyltrimethoxysilane, vinyltris(β-methoxyethoxy)silane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-chloropropyltriethoxysilane, vinyltris-tert-butylperoxy silane, vinyltrichlorosilane, vinyltrimethoxysilane, phenylaminopropyltrimethoxysilane, γ-isocyanatopropyltriethoxysilane, DL-411 type aluminate coupling agent, DL-482 type aluminate coupling agent, RCA aluminate coupling agent, CHY-501 aluminate coupling agent, tetra-n-propyl zirconate (CAS No.: 23519-77-9), and chromium methacrylate.

[0052] Further preferably, the coupling agent is tetra-n-propyl zirconate.

[0053] The application discloses a preparation method of the anti-radiation post-mold film.

[0054] The thermoplastic acrylic resin, ethyl acetate and wet dispersant are uniformly stirred;

[0055] The coupling agent modified antimony-doped tin oxide is further added and uniformly stirred to obtain the functional coating film;

[0056] The functional coating film is uniformly coated on the base film and dried.

[0057] Further preferably, the functional coating film is prepared from the following raw materials by weight:

[0058] 60-70 parts of thermoplastic acrylic resin;

[0059] 25-35 parts of ethyl acetate;

[0060] 0.5-1.1 parts of wet dispersant;

[0061] 1-3 parts of coupling agent modified antimony-doped tin oxide;

[0062] 1-3 parts of lead octoate.

[0063] Lead octoate is a compound containing lead. Due to the high atomic number and high density of lead, lead octoate has the ability to prevent radiation. The main reason is that the lead element can absorb and block high-energy radiation such as X-rays and gamma rays. The atomic number of lead is 82, and the higher atomic number means more electrons. These electrons can absorb radiation energy, thereby preventing radiation from penetrating the material. More electrons will result in a higher probability of photoelectric effect, which is one of the main ways of interaction between X-rays and gamma rays and matter.

[0064] The further introduction of lead octoate in the application can effectively improve the radiation resistance of the film layer.

[0065] The application improves the radiation resistance of the film layer by using antimony-doped tin oxide, and further improves the radiation resistance of the film layer by modifying the antimony-doped tin oxide with a coupling agent.

[0066] In the examples and comparative examples of the application, some raw materials are introduced as follows:

[0067] The base film is made of TECOTHANE TM TPU film (American Lubrizol TT-1074A TPU), thickness 500 μm.

[0068] The thermoplastic acrylic resin is Dutch Evonik NeoCryl B-735 methacrylic resin.

[0069] The wet dispersant is BYK-Chemie DISPERBYK-2008 wet dispersant.

[0070] The antimony-doped tin oxide, referred to as ATO, is provided by Hangzhou Jibin New Material Co., Ltd. in a model SS-A07, with a particle size D50 (laser particle size analyzer method) of 1.5 μm.

[0071] Example 1

[0072] A radiation-proof plastic removal film includes a base film and a functional coating film, with the thickness of the functional coating film controlled to be 100 μm.

[0073] The functional coating film is prepared from the following raw materials in parts by weight:

[0074] 66 parts of a thermoplastic acrylic resin;

[0075] 29.25 parts of ethyl acetate;

[0076] 0.75 parts of a wet dispersant;

[0077] 4 parts of antimony-doped tin oxide.

[0078] A specific preparation method of the radiation-proof plastic removal film is as follows:

[0079] (1) Preparation of the functional coating film

[0080] The thermoplastic acrylic resin, ethyl acetate and wet dispersant are stirred at 55°C and 800 r / min for 20 min;

[0081] The antimony-doped tin oxide is then added, and the mixture is stirred at 55°C and 1000 r / min for 50 min.

[0082] (2) Base film coating

[0083] The functional coating film is uniformly coated on the base film by a doctor blade coating method, and is dried to obtain the radiation-proof plastic removal film of the present application.

[0084] Example 2

[0085] The antimony-doped tin oxide in Example 1 is replaced with an equal amount of coupling agent-modified antimony-doped tin oxide.

[0086] The preparation method of the coupling agent-modified antimony-doped tin oxide is as follows: 8 wt% γ-mercaptopropyltrimethoxysilane is mixed with 92 wt% antimony-doped tin oxide, and the mixture is uniformly stirred by ball milling.

[0087] Specifically, the coupling agent-modified antimony-doped tin oxide is prepared as follows:

[0088] A radiation-proof plastic removal film includes a base film and a functional coating film, with the thickness of the functional coating film controlled to be 100 μm.

[0089] The functional coating film is prepared from the following raw materials by weight:

[0090] 66 parts of thermoplastic acrylic resin;

[0091] 28.9 parts of ethyl acetate;

[0092] 0.75 parts of wet dispersant;

[0093] 4.35 parts of coupling agent modified antimony-doped tin oxide.

[0094] The specific preparation method of the anti-radiation plastic removal film:

[0095] (1) Preparation of functional coating film

[0096] Stir the thermoplastic acrylic resin, ethyl acetate and wet dispersant at 55°C and 800r / min for 20min;

[0097] Then add the coupling agent modified antimony-doped tin oxide, stir at 55°C and 1000r / min for 50min.

[0098] (2) Base film coating

[0099] The above functional coating film is uniformly coated on the base film by doctor blade coating method, and dried to obtain the anti-radiation plastic removal film of the application.

[0100] Example 3:

[0101] Replace the γ-mercaptopropyl trimethoxysilane in Example 2 with an equal amount of 3-chloropropyl triethoxysilane.

[0102] Example 4:

[0103] Replace the γ-mercaptopropyl trimethoxysilane in Example 2 with an equal amount of isopropyl tris(dioctylphosphato) titanate.

[0104] Example 5:

[0105] Replace the γ-mercaptopropyl trimethoxysilane in Example 2 with an equal amount of silane coupling agent KH-550.

[0106] Example 6:

[0107] Replace the γ-mercaptopropyl trimethoxysilane in Example 2 with an equal amount of RCA aluminic ester coupling agent.

[0108] Example 7:

[0109] Replace the γ-mercaptopropyl trimethoxysilane in Example 2 with an equal amount of tetra-n-propyl zirconate.

[0110] Example 8:

[0111] The application discloses a radiation-proof plastic removal film, which comprises a base film and a functional coating film.

[0112] The functional coating film is prepared from the following raw materials by weight:

[0113] 66 parts of thermoplastic acrylic resin;

[0114] 28.9 parts of ethyl acetate;

[0115] 0.75 parts of wet dispersant;

[0116] 2.35 parts of coupling agent modified antimony-doped tin oxide;

[0117] 2 parts of lead octoate.

[0118] The specific preparation method of the radiation-proof plastic removal film is as follows:

[0119] (1) preparing the functional coating film

[0120] The thermoplastic acrylic resin, the ethyl acetate and the wet dispersant are stirred at 55 DEG C. and 800 r / min for 20 min;

[0121] Then, the coupling agent modified antimony-doped tin oxide and the lead octoate are added and stirred at 55 DEG C. and 1000 r / min for 50 min.

[0122] (2) base film coating

[0123] The above functional coating film is uniformly coated on the base film by using a doctor blade coating method, and is dried to obtain the radiation-proof plastic removal film.

[0124] The specific preparation method of the coupling agent modified antimony-doped tin oxide is as follows: 8wt% tetra-n-propyl zirconate is uniformly mixed with 92wt% antimony-doped tin oxide by using a ball milling method.

[0125] Comparative example 1:

[0126] The application discloses a radiation-proof plastic removal film, which comprises a base film and a functional coating film.

[0127] The functional coating film is prepared from the following raw materials by weight:

[0128] 66 parts of thermoplastic acrylic resin;

[0129] 28.9 parts of ethyl acetate;

[0130] 0.75 parts of wet dispersant;

[0131] 4.35 parts of lead octoate.

[0132] The specific preparation method of the radiation-proof plastic removal film is as follows:

[0133] (1) Preparation of functional coating film

[0134] The thermoplastic acrylic resin, ethyl acetate and wet dispersant were stirred at 55°C for 20 min at 800 r / min;

[0135] Then lead octoate was added and stirred at 55°C for 50 min at 1000 r / min.

[0136] (2) Base film coating

[0137] The above functional coating film was uniformly coated on the base film by the knife coating method, and dried to obtain the radiation-proof plastic removal film of the present application.

[0138] Test Example 1:

[0139] The test standard used was GB / T 25471-2010 Electromagnetic Shielding Coating Shielding Effectiveness Measurement Method, and the test instrument model was DR-S02A automatic flange coaxial SE test system.

[0140] Shielding effectiveness, dB Example 1 52.2 Example 2 53.9 Example 3 51.4 Example 4 53.2 Example 5 50.6 Example 6 54.8 Example 7 60.3 Example 8 68.6 Comparative Example 1 57.5 Blank (pure base film) 0

[0141] The main difference between Example 1 and Example 2 is the raw material used to prepare the functional coating film. In Example 1, ordinary antimony-doped tin oxide is used, while in Example 2, antimony-doped tin oxide modified by a coupling agent is used.

[0142] Modification by a coupling agent can significantly improve the compatibility of antimony-doped tin oxide with the organic matrix, achieving more uniform dispersion and preventing the aggregation of antimony-doped tin oxide, thereby ensuring the uniformity and consistency of the coating. Antimony-doped tin oxide modified by a coupling agent is more easily dispersed uniformly in the coating, which can effectively improve the radiation-proof performance of the film. Uniformly dispersed antimony-doped tin oxide can provide more stable and consistent radiation-proof effect. The introduction of a coupling agent not only improves the compatibility and dispersion between materials, but also may improve other properties of the coating film, such as wear resistance, temperature resistance, and stability, thereby broadening the application range of the material. Example 2 uses silane coupling agent γ-mercaptopropyl trimethoxysilane to improve the bonding force between the inorganic filler and the organic matrix. In this example, it is mixed with antimony-doped tin oxide by ball milling, which helps to enhance the chemical bonding between the two, achieving a more uniform and stable mixture.

[0143] In summary, by introducing antimony-doped tin oxide modified by coupling agent γ-mercaptopropyl trimethoxysilane, Example 2 achieves better dispersion of antimony-doped tin oxide, higher radiation-proof performance and coating film performance compared to Example 1.

[0144] From the experimental data provided, we can see that the radiation shielding effectiveness of Examples 2-7 varies. The shielding effectiveness is measured in dB, and the higher the value, the better the radiation shielding performance.

[0145] Example 2 uses γ-mercaptopropyltrimethoxysilane as the coupling agent, and the shielding effectiveness is 53.9 dB. This may be due to the fact that γ-mercaptopropyltrimethoxysilane enhances the compatibility and interfacial bonding between the antimony-doped tin oxide and the substrate, thereby improving the overall shielding effectiveness.

[0146] The shielding effectiveness of Example 3 is 51.4 dB, which is slightly lower than Example 2. The 3-chloropropyltriethoxysilane used in Example 3 may not be as effective as γ-mercaptopropyltrimethoxysilane in improving interfacial performance and compatibility, resulting in lower shielding effectiveness.

[0147] The isopropyl tri(dioctylphosphato) titanate used in Example 4 exhibits a shielding effectiveness of 53.2 dB, which is not much different from Example 2, possibly indicating that this coupling agent also has some effect.

[0148] The shielding effectiveness of the silane coupling agent KH-550 used in Example 5 is 50.6 dB, which is the lowest among all examples. This may indicate that the interaction between KH-550 and antimony-doped tin oxide is not as good as other coupling agents.

[0149] The RCA aluminate coupling agent used in Example 6 exhibits a relatively high shielding effectiveness of 54.8 dB. This may indicate that the RCA aluminate coupling agent is effective in improving compatibility and interfacial bonding.

[0150] The tetra-n-propyl zirconate used in Example 7 exhibits the highest shielding effectiveness, reaching 60.3 dB. Zirconium itself does not have radiation shielding properties. Typically, radiation shielding materials contain elements with high atomic numbers, such as lead, because these elements can more effectively block or absorb radiation. Zirconium has a lower atomic number and does not have such properties. However, in Example 7, tetra-n-propyl zirconate as a coupling agent may improve the interfacial performance and compatibility between antimony-doped tin oxide and the substrate, thereby improving the overall radiation shielding performance of the material. In other words, the main role of tetra-n-propyl zirconate in this system may be to promote better dispersibility and adhesion, rather than directly participating in the blocking or absorption of radiation.

[0151] Different coupling agents have a significant impact on the radiation protection performance. In these examples, Example 7 (using tetra-n-propyl zirconate) showed the best radiation protection performance, while Example 5 (using silane coupling agent KH-550) performed the worst. This may be related to the chemical structure and properties of different coupling agents, as well as their interaction with antimony-doped tin oxide. When designing high-performance radiation protection materials, selecting the appropriate coupling agent is crucial.

[0152] Example 7 uses a single coupling agent to modify antimony-doped tin oxide, Comparative Example 1 uses a single lead octoate, and Example 8 uses a coupling agent to modify antimony-doped tin oxide and a combination of lead octoate. The effect of Example 8 is significantly better than that of Example 7 and Comparative Example 1. The inventors attempted to analyze the possible mechanism: the interface between antimony-doped tin oxide and lead octoate may produce more complex structures and effects, which not only scatter and absorb radiation, but also change the path of radiation propagation, thereby improving the radiation protection effect. And because of the different radiation protection mechanisms of lead octoate and antimony-doped tin oxide, they each provide protection at different levels, forming a multi-level protection structure, which can make it more difficult for radiation to penetrate and improve the radiation protection efficiency.

[0153] From the test results, it can be seen that the anti-radiation plastic removal film provided by the present application has excellent shielding performance, stable performance, and good anti-radiation performance.

Claims

1. A radiation-shielding de-plasticizing film comprising a base film and a functional coating film, characterized in that, The functional coating film is prepared from the following raw materials by weight: 60-70 parts of thermoplastic acrylic resin; 25-35 parts of ethyl acetate; 0.5-1.1 parts of wet dispersing agent; 1-3 parts of coupling agent modified antimony-doped tin oxide; 1-3 parts of lead octoate; The coupling agent modified antimony-doped tin oxide is prepared by modifying antimony-doped tin oxide with tetra-n-propyl zirconate.

2. The radiation shielded de-plasticizing film according to claim 1, wherein: The mass ratio of the tetra-n-propyl zirconate to the antimony-doped tin oxide is (5-10):

100.

3. The radiation shielded de-plasticizing film according to claim 2, wherein, The coupling agent modified antimony-doped tin oxide is prepared by mixing the tetra-n-propyl zirconate and the antimony-doped tin oxide uniformly.

4. A method of producing the radiation-shielding release film according to any one of claims 1 to 3, characterized by, The method comprises the following steps: stirring the thermoplastic acrylic resin, the ethyl acetate and the wet dispersing agent uniformly; adding the coupling agent modified antimony-doped tin oxide and the lead octoate, and stirring uniformly to obtain the functional coating film; coating the functional coating film on the base film uniformly, and drying.