Antibacterial mildew-proof high-flash glitter powder membrane material and preparation method thereof

Abstract

The invention relates to the technical field of decorative films, in particular to an antibacterial mildew-proof high-flash glitter powder film material and a preparation method thereof.The preparation method comprises the following steps that S1, a two-way stretching PET film base material is taken, subjected to surface cleaning and dust removal, corona treatment and preheating, then subjected to vacuum evaporation to form a silver layer, cooled and taken out of a cabin, and a silver-plated PET film is obtained; s2, adding a terpolymer into deionized water, carrying out ultrasonic dispersion, adding a waterborne polyurethane binder, stirring, adding glitter powder, and continuously stirring to obtain functional coating slurry; and S3, uniformly coating the surface of the silver-plated PET film with the functional coating slurry, drying with hot air, irradiating and curing the coating by using a UV lamp, and carrying out heat setting treatment and rolling in a nitrogen atmosphere to obtain the silver-plated PET film. The antibacterial mildew-proof high-flash glitter powder membrane material prepared by the preparation method disclosed by the invention has good optical performance and also has good antibacterial performance.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative films, and particularly to an antibacterial and mildew-proof high-glitter glitter powder film material and a preparation method thereof. Background Art

[0002] Glitter powder film materials have characteristics such as excellent glitter effects and diverse color changes, and are widely used as decorative materials in fields such as packaging decoration, high-end handicraft production, and high-end cosmetic packaging. Glitter powder, commonly known as sequins, gold flakes, silver flakes or gold and silver powder, was originally made by precisely cutting electroplated film raw materials with extremely high brightness and different thicknesses, and has highly glittery characteristics. With development, its materials have expanded from a single type to various types such as PET, PVC, OPP, and metallic silver, and its shapes have also expanded from quadrilaterals and hexagons to rectangles, rhombuses, etc. The colors are even more abundant, covering laser series, solid color series, iridescent series, seven-color series, etc. Glitter powder film materials are widely used in the mid- to high-end packaging decoration field. In liquor packaging, they can be used for wine boxes to enhance the matte texture and scratch resistance; in gift decoration, they can be used for surface lamination of gifts and wedding supplies to enhance the glitter effect and festive atmosphere; in cosmetic packaging, brand logos can be presented three-dimensionally through hot stamping process, taking into account both aesthetics and protection; in architectural decoration, they can be used as film materials for glass curtain walls and interior panels to optimize the spatial visual effect.

[0003] In many application scenarios, such as food packaging, cosmetic packaging, and interior decoration materials, the film materials face complex and diverse microbial threats. The existing antibacterial agents for glitter powder film materials have a narrow antibacterial spectrum and can only inhibit some bacteria, and have poor inhibitory effects on molds, fungi, etc. In humid environments or environments rich in organic matter, molds and fungi are extremely likely to grow, resulting in mildew spots and color changes on the film materials, affecting aesthetics and use safety. The existing antibacterial agents for film materials have poor persistence and will decompose and volatilize due to factors such as light, humidity, and temperature, or react with the film material components and become ineffective. In addition, high-glitter glitter powder film materials are highly favored in the fields of packaging, decoration, etc. due to their unique glitter effects. However, in the existing technology, when adding antibacterial and mildew-proof components, the distribution and reflection performance of the glitter powder are often affected, resulting in a deteriorated glitter effect of the film material. For example, in cosmetic packaging, a poor glitter effect will reduce the attractiveness and grade of the product. Summary of the Invention

[0004] In order to solve the problems mentioned in the above background art, the present invention provides an antibacterial and mildew-proof high-glitter glitter powder film material and a preparation method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: A preparation method of an antibacterial and mildew-proof high-glitter glitter powder film material, comprising the following steps: S1. Take a biaxially oriented PET film substrate, clean and remove dust from its surface, conduct corona treatment for 10 - 20 min. After preheating, under the condition of a base vacuum degree ≤ 5×10 -3 Pa and an operating vacuum degree ≤ 2×10 -2 Pa, vacuum deposit a silver layer, cool and then take it out of the chamber to obtain a silver-coated PET film; S2. Add a terpolymer into deionized water, ultrasonically disperse it for 20 - 30 min, add an aqueous polyurethane binder, stir for 10 - 20 min, add glitters with an average particle size of 80 - 150 μm and a thickness of 0.02 - 0.05 μm, and continue to stir for 5 - 10 min to obtain a functional coating slurry; S3. Uniformly coat the functional coating slurry on the surface of the silver-coated PET film by knife coating method or gravure coating method, control the wet coating amount at 45 - 60 g / m 2 , dry it with hot air for 2 - 4 h, irradiate and cure the coating with a UV lamp having a main wavelength of 320 - 400 nm, with an exposure time of 6 - 7 s, under a nitrogen atmosphere, conduct heat setting treatment for 10 - 12 s, and wind it up to obtain an antibacterial and mildew-proof high-glitter glitter film material.

[0006] Further, in step S1, the corona power is 1.4 - 1.6 kW / m, the treatment speed is 20 - 25 m / min, and it is preheated to 150 - 160 °C.

[0007] Further, in step S1, when vacuum depositing the silver layer, the evaporation rate is 0.4 - 0.6 nm / s, the coating thickness is 0.08 - 0.12 μm, and it is cooled to 60 - 65 °C.

[0008] Further, the terpolymer in step S2 is prepared through the following steps: Add methacrylic acid, pentafluorostyrene, and 4 - acryloylmorpholine into a reactor pre-filled with N,N - dimethylformamide, stir for 10 - 20 min, under nitrogen protection, add azobisisobutyronitrile, raise the temperature by oil bath, stir and react for 6 - 8 h. After the reaction ends, cool to room temperature, slowly drop it into vigorously stirred methanol, precipitate white fibrous precipitate, let it stand for 30 - 60 min, filter, wash the precipitate with methanol, and dry it for 12 - 18 h to obtain the terpolymer.

[0009] Further, in step S2, the mass ratio of the terpolymer, deionized water, aqueous polyurethane binder, and glitters is (5 - 10):(30 - 40):(8 - 15):(40 - 55). The aqueous polyurethane binder is anionic or non-ionic, with a solid content of 30 - 50% and a viscosity of 100 - 500 mPa·s.

[0010] Further, in step S2, the power of ultrasonic dispersion is 200 - 300 W, the frequency is 40 - 50 kHz, and the stirring speed is 100 - 200 rpm.

[0011] Further, in step S3, the temperature of hot air drying is 60 - 70 °C, the energy density of UV lamp irradiation is 800 - 900 mJ / cm 2 , the irradiation intensity is 120 - 130 mW / cm 2 , and the temperature of heat setting treatment is 180 - 190 °C.

[0012] Further, the mass ratio of methacrylic acid, pentafluorostyrene, 4 - acryloylmorpholine, N,N - dimethylformamide, and azobisisobutyronitrile is (12 - 15):(25 - 30):(18 - 22):(150 - 180):(0.6 - 0.8).

[0013] Further, the temperature of oil bath heating is 70 - 75 °C, and the stirring speed is 200 - 300 rpm.

[0014] According to another aspect of the present invention, there is provided an antibacterial and mildew - proof high - flash glitter powder film material prepared by the above - mentioned preparation method.

[0015] Advantages of the present invention: 1. In the technical solution of the present invention, the glitter powder is micron - sized flaky metal particles with a faceted or etched structure on the surface. When light penetrates the upper transparent coating, part of the light is directly reflected by the facets of the glitter powder, forming dot - like highlights. Another part of the light is reflected by the silver layer and then penetrates the glitter powder again, and is refracted / scattered by its facets to form diffuse reflection. The superposition of specular reflection and diffuse reflection produces a dynamic three - dimensional flickering sensation visually.

[0016] 2. In the technical solution of the present invention, the pentafluorostyrene unit in the terpolymer endows it with a fluorinated chain segment, which has an extremely low surface energy. In the heat setting treatment stage of the final coating, the polymer chain segments obtain high mobility. Driven by the principle of minimizing surface energy thermodynamically, the fluorinated chain segments will spontaneously migrate, enrich, and arrange orderly on the outermost surface of the coating, forming a physical barrier composed of dense fluorine atoms similar to fluorinated polymers on the coating surface, greatly reducing water, organic pollutants, and microorganisms.

[0017] 3. In the technical solution of the present invention, the copolymer molecular chain runs through the entire coating. The polar functional groups on the chain, especially the carboxyl group provided by the methacrylic acid unit and the morpholine ring provided by the 4-acryloylmorpholine unit, jointly constitute the antibacterial mechanism. The carboxyl group can be slightly ionized in the microenvironment of the material. By means of electrostatic action and locally changing the pH value, it interferes with the membrane potential and its stability of the charged bacterial cell membrane, endowing the coating with long-acting and broad-spectrum antibacterial ability, and greatly reducing the failure and drug resistance risks existing in traditional dissolution-type antibacterial agents.

[0018] 4. In the aqueous slurry, its hydrophobic pentafluorostyrene chain segment can be effectively adsorbed on the surface of the glitter powder particles through strong van der Waals forces, reducing the tendency of the glitter powder to fall off during coating, processing or use, and improving the durability of the product. Detailed implementation manners

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Preparation Example 1 The ternary copolymer is prepared through the following steps: 120 g of methacrylic acid, 250 g of pentafluorostyrene and 180 g of 4-acryloylmorpholine are added to a reactor pre-filled with 1500 g of N,N-dimethylformamide, stirred at a speed of 200 rpm for 10 min. Under nitrogen protection, 6 g of azobisisobutyronitrile is added, the oil bath is heated to 70 °C, and the reaction is stirred at a speed of 200 rpm for 6 h. After the reaction is completed, it is cooled to room temperature, slowly dropped into methanol with vigorous stirring at 3 times the volume of the reaction solution, white fibrous precipitates are precipitated, allowed to stand for 30 min, filtered, the precipitate is washed with methanol, and dried at 40 °C for 12 h to obtain the ternary copolymer.

[0021] Preparation Example 2 The ternary copolymer is prepared through the following steps: 132 g of methacrylic acid, 277 g of pentafluorostyrene and 204 g of 4-acryloylmorpholine are added to a reactor pre-filled with 1700 g of N,N-dimethylformamide, stirred at a speed of 250 rpm for 15 min. Under nitrogen protection, 7 g of azobisisobutyronitrile is added, the oil bath is heated to 72 °C, and the reaction is stirred at a speed of 250 rpm for 7 h. After the reaction is completed, it is cooled to room temperature, slowly dropped into methanol with vigorous stirring at 3 times the volume of the reaction solution, white fibrous precipitates are precipitated, allowed to stand for 45 min, filtered, the precipitate is washed with methanol, and dried at 40 °C for 16 h to obtain the ternary copolymer.

[0022] Preparation Example 3 The terpolymer was prepared by the following steps: 150 g of methacrylic acid, 300 g of pentafluorostyrene, and 220 g of 4-acryloylmorpholine were added to a reactor pre-filled with 1800 g of N,N-dimethylformamide, stirred at a speed of 300 rpm for 20 min, 8 g of azobisisobutyronitrile was added under nitrogen protection, the oil bath was heated to 75 °C, and the reaction was stirred at a speed of 300 rpm for 8 h. After the reaction was completed, it was cooled to room temperature, slowly dropped into methanol with vigorous stirring at 3 times the volume of the reaction solution, a white fibrous precipitate was precipitated, allowed to stand for 60 min, filtered, the precipitate was washed with methanol, and dried at 40 °C for 18 h to obtain the terpolymer.

[0023] Example 1 A method for preparing an antibacterial and mildew-proof high-glitter gold flake powder film material includes the following steps: S1. Take a biaxially oriented PET film substrate, clean and remove dust on the surface, corona treat for 10 min, the corona power is 1.4 kW / m, the treatment speed is 20 m / min, after preheating to 150 °C, under a base vacuum of 5×10 -3 Pa and an operating vacuum of 2×10 -2 Pa, vacuum evaporate the silver layer, the evaporation rate is 0.4 nm / s, the coating thickness is 0.08 μm, and after cooling to 60 °C, take out of the chamber to obtain a silver-coated PET film; S2. Add 5 parts of the terpolymer prepared in Preparation Example 1 to 30 parts of deionized water, ultrasonically disperse for 20 min, the power of ultrasonic dispersion is 200 W, the frequency is 40 kHz, add 8 parts of a waterborne polyurethane binder, stir at a speed of 100 rpm for 10 min, add 40 parts of gold flakes with an average particle size of 80 μm and a thickness of 0.02 μm, and continue to stir at a speed of 100 rpm for 5 min to obtain a functional coating slurry; S3. Uniformly coat the functional coating slurry on the surface of the silver-coated PET film by the doctor blade coating method, control the wet coating amount at 45 g / m 2 , dry with hot air at 60 °C for 2 h, irradiate and cure the coating with a UV lamp with a main wavelength of 320 nm, the energy density is 800 mJ / cm 2 , the irradiation intensity is 120 mW / cm 2 , the exposure time is 6 s, under a nitrogen atmosphere, perform heat setting treatment at 180 °C for 10 s, wind up, and obtain an antibacterial and mildew-proof high-glitter gold flake powder film material.

[0024] Example 2 A method for preparing an antibacterial and mildew-proof high-glitter gold flake powder film material includes the following steps: S1. Take a biaxially oriented PET film substrate, clean and dust the surface, perform corona treatment for 15 min, with a corona power of 1.5 kW / m and a treatment speed of 22 m / min. After preheating to 155 °C, under a base vacuum of 5×10 -3 Pa and an operating vacuum of 2×10 -2 Pa, vacuum evaporate a silver layer with an evaporation rate of 0.5 nm / s and a coating thickness of 0.09 μm. After cooling to 62 °C, take it out of the chamber to obtain a silver-coated PET film; S2. Add 7 parts of the terpolymer prepared in Preparation Example 2 to 33 parts of deionized water, ultrasonically disperse for 25 min, with an ultrasonic dispersion power of 250 W and a frequency of 45 kHz. Add 10 parts of a waterborne polyurethane binder, stir at a speed of 150 rpm for 15 min, add 50 parts of glitter powder with an average particle size of 100 μm and a thickness of 0.03 μm, and continue to stir at a speed of 150 rpm for 7 min to obtain a functional coating slurry; S3. Uniformly coat the functional coating slurry on the surface of the silver-coated PET film by the doctor blade coating method, control the wet coating amount at 50 g / m 2 , dry with hot air at 65 °C for 3 h, irradiate and cure the coating with a UV lamp with a main wavelength of 350 nm, with an energy density of 850 mJ / cm 2 , an irradiation intensity of 125 mW / cm 2 , an exposure time of 6.5 s. Under a nitrogen atmosphere, perform heat setting treatment at 185 °C for 11 s, and wind up to obtain an antibacterial and mildew-proof high-glitter glitter powder film material.

[0025] Example 3 A method for preparing an antibacterial and mildew-proof high-glitter glitter powder film material, comprising the following steps: S1. Take a biaxially oriented PET film substrate, clean and dust the surface, perform corona treatment for 20 min, with a corona power of 1.6 kW / m and a treatment speed of 25 m / min. After preheating to 160 °C, under a base vacuum of 5×10 -3 Pa and an operating vacuum of 2×10 -2 Pa, vacuum evaporate a silver layer with an evaporation rate of 0.6 nm / s and a coating thickness of 0.12 μm. After cooling to 65 °C, take it out of the chamber to obtain a silver-coated PET film; S2. Add 10 parts of the terpolymer prepared in Preparation Example 3 to 40 parts of deionized water, ultrasonically disperse for 30 min, with an ultrasonic dispersion power of 300 W and a frequency of 50 kHz. Add 15 parts of a waterborne polyurethane binder, stir at a speed of 200 rpm for 20 min, add 55 parts of glitter powder with an average particle size of 150 μm and a thickness of 0.05 μm, and continue to stir at a speed of 200 rpm for 10 min to obtain a functional coating slurry; S3. Uniformly coat the functional coating slurry on the surface of the silver-plated PET film by the doctor blade coating method, and control the wet coating amount at 60 g / m 2 , dry it with hot air at 70 °C for 4 h, irradiate and cure the coating with a UV lamp with a main wavelength of 400 nm, and the energy density is 900 mJ / cm 2 , the irradiation intensity is 130 mW / cm 2 , the exposure time is 7 s, under a nitrogen atmosphere, perform heat setting treatment at 190 °C for 12 s, wind up, and obtain an antibacterial and mildew-proof high-shine glitter powder film material.

[0026] Comparative Example 1 The difference between this comparative example and Preparation Example 1 is that methacrylic acid is not added, and the remaining steps are the same as those in Preparation Example 1.

[0027] Comparative Example 2 The difference between this comparative example and Preparation Example 2 is that pentafluorostyrene is not added, and the remaining steps are the same as those in Preparation Example 2.

[0028] Comparative Example 3 The difference between this comparative example and Preparation Example 3 is that 4-acryloylmorpholine is not added, and the remaining steps are the same as those in Preparation Example 3.

[0029] Comparative Example 4 The difference between this comparative example and Example 1 is that the product obtained in Comparative Example 1 is used to replace the terpolymer obtained in Preparation Example 1, and the remaining steps are the same as those in Example 1.

[0030] Comparative Example 5 The difference between this comparative example and Example 2 is that the product obtained in Comparative Example 2 is used to replace the terpolymer obtained in Preparation Example 2, and the remaining steps are the same as those in Example 2.

[0031] Comparative Example 6 The difference between this comparative example and Example 3 is that the product obtained in Comparative Example 3 is used to replace the terpolymer obtained in Preparation Example 3, and the remaining steps are the same as those in Example 3.

[0032] Comparative Example 7 The difference between this comparative example and Example 3 is that the terpolymer obtained in Preparation Example 3 is not added, and the remaining steps are the same as those in Example 3.

[0033] Cut the film materials obtained in Examples 1-3 and Comparative Examples 4-7 into 5×5 cm² specimens, soak them in 70% ethanol for disinfection for 30 min, take them out, rinse them 3 times with sterile PBS buffer solution, and air dry for 1 h to obtain each specimen for standby.

[0034] Inoculate the frozen strain of Staphylococcus aureus (ATCC 6538) into 10 mL of TSB and culture it with shaking at 37°C for 18 h. Take 1 mL of the bacterial solution and centrifuge it at 3000 rpm for 10 min. Discard the supernatant, resuspend and wash it twice with PBS buffer, and adjust the concentration to CFU / mL with normal saline. Drop 100 μL of the bacterial solution at the center of the sample surface, cover it with a sterile PE film with a size of 4×4 cm², and gently press to ensure that the bacterial solution contacts the surface evenly and avoid air bubbles. Place the inoculated sample in an incubator at 37°C and 90% RH for 24 h. Take out the sample and put it into a sterile centrifuge tube containing 10 mL of PBS buffer, and vortex for 2 min. Take 1 mL of the eluate and perform 10 -1 -, 10 -2 -, 10 -3 gradient dilutions with normal saline. Take 100 μL of the bacterial solution at each dilution, spread it evenly on a nutrient agar plate, with 3 parallels for each dilution, culture it in an inverted position at 37°C for 24 h, count the number of colonies (CFU) visible to the naked eye on the plate, and calculate the viable bacteria concentration and antibacterial rate. The calculation formulas are as follows: Viable bacteria concentration in the eluate (CFU / mL) = average number of colonies × dilution factor × 10 Antibacterial rate (%) = (1 - )× 100 The results are shown in Table 1: Table 1. Test results of the antibacterial properties of the membrane materials against Staphylococcus aureus

[0035] Refer to ASTM D523 "Standard Test Method for Specular Gloss" and ASTM D1003 "Standard Test Method for Haze and Light Transmittance of Transparent Plastics". Cut the membrane materials prepared in Examples 1 - 3 and Comparative Examples 4 - 7 into specimens with a size of 100×100 mm², with 3 parallel specimens in each group. Moisten the non-woven fabric with anhydrous ethanol and wipe the surface unidirectionally, and let it stand in a dust-free environment for 15 min. Wait for the solvent to completely volatilize, and obtain the specimens for standby. Fix the specimens on the test bench to ensure no wrinkles, and perform specular gloss measurement with a gloss meter at 5 points (center + four corners, spacing ≥ 20 mm), set the incident angle to 60°, the measurement aperture to Φ10 mm, and the reading stabilization time to 3 s. Each group of specimens needs to be measured 3 times repeatedly, and calculate the average glossiness value (GU) of each group. After the measurement is completed, take down the specimens, place them in the sample holder of the haze meter, ensure no air bubbles / scratches, first measure the total light transmittance (T t ), and then measure the scattered light transmittance (T d ). Measure 3 different regions for each group and take the average value to calculate the haze. Haze (%) = (T d / T t ) × 100. The results are shown in Table 2: Table 2. Test Results of Optical Properties of the Membrane Material

[0036] As can be seen from Table 1, the membrane materials of Examples 1-3 have significant antibacterial effects against Staphylococcus aureus, and the antibacterial rates are all over 98%. In contrast, the antibacterial rates of Comparative Examples 4-7 are significantly reduced. The addition of the terpolymer in Examples 1-3 significantly improves the antibacterial performance of the membrane material. This may be because certain groups in the terpolymer have an inhibitory effect on bacteria, or the terpolymer forms an antibacterial layer on the surface of the membrane material. In Comparative Examples 4-7, not adding or replacing a certain monomer in the terpolymer leads to a significant decrease in antibacterial performance. It shows that the antibacterial performance of the terpolymer depends on its specific chemical structure, especially the synergistic effect of methacrylic acid, pentafluorostyrene and 4-acryloylmorpholine.

[0037] As can be seen from Table 2, the membrane materials of Examples 1-3 have higher gloss and lower haze values, indicating that they have good optical properties. In contrast, the gloss of Comparative Examples 4-7 decreases and the haze value increases. The addition of the terpolymer in Examples 1-3 may improve the surface flatness and transparency of the membrane material, thereby increasing the gloss and reducing the haze. This may be because the terpolymer forms a uniform coating on the surface of the membrane material, reducing light scattering and reflection. In Comparative Examples 4-7, not adding or replacing a certain monomer in the terpolymer leads to a decrease in the optical properties of the membrane material. This may be because of the lack of certain key groups or structures in the terpolymer, making the surface of the membrane material rough or uneven, thus increasing light scattering and reflection.

[0038] Methacrylic acid in the terpolymer may contain active groups such as carboxyl groups. These groups can interact with the components on the bacterial cell wall or cell membrane, destroying the structure and function of bacteria. The fluorine atoms in pentafluorostyrene have strong electronegativity and may produce an electrostatic repulsion effect on bacteria, thus inhibiting the attachment and growth of bacteria. 4-Acryloylmorpholine may interact with bacteria through its unique chemical structure, interfering with the metabolic process of bacteria. The coating formed by the terpolymer on the surface of the membrane material may have a uniform thickness and a smooth surface, thus reducing light scattering and reflection and increasing the gloss. At the same time, the coating may reduce the internal defects and impurities of the membrane material, reducing the haze value.

[0039] In summary, the membrane materials prepared in Examples 1-3 have good antibacterial and optical properties.

[0040] In the description of the specification, the descriptions referring to terms such as "preparation example", "embodiment", "each embodiment", etc. mean that the specific features, structures, materials or characteristics described in connection with that embodiment or preparation example are included in at least one embodiment or preparation example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or preparation example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or preparation examples.

[0041] As mentioned above, only the preferred specific embodiments of the present invention are described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A preparation method of an antibacterial and mildew-proof high-glitter gold glitter powder film material, characterized in that It includes the following steps: S1. Take a biaxially stretched PET film substrate, clean and remove dust on the surface, corona treat for 10 - 20 min, after preheating, vacuum evaporate a silver layer, cool and take out of the chamber to obtain a silver-coated PET film; S2. Add a terpolymer into deionized water, ultrasonically disperse for 20 - 30 min, add an aqueous polyurethane binder, stir for 10 - 20 min, add glitter powder, and continue to stir for 5 - 10 min to obtain a functional coating slurry; S3. Uniformly coat the functional coating slurry on the surface of the silver-coated PET film, dry with hot air for 2 - 4 h, irradiate and cure the coating with a UV lamp, the exposure time is 6 - 7 s, under a nitrogen atmosphere, perform heat setting treatment for 10 - 12 s, and wind up to obtain an antibacterial and mildew-proof high-glitter glitter powder film material.

2. The preparation method of an antibacterial and mildew-proof high-shine glitter powder film material according to claim 1, characterized in that, In step S1, the corona power is 1.4 - 1.6 kW / m, the treatment speed is 20 - 25 m / min, and preheat to 150 - 160 °C.

3. The preparation method of an antibacterial and mildew-proof high-glitter gold glitter powder film material according to claim 1, wherein, In step S1, when vacuum evaporating the silver layer, the evaporation rate is 0.4 - 0.6 nm / s, the coating thickness is 0.08 - 0.12 μm, and cool to 60 - 65 °C.

4. The preparation method of an antibacterial and mildew-proof high-glitter gold glitter powder film material according to claim 1, characterized in that, In step S2, the terpolymer is prepared through the following steps: Add methacrylic acid, pentafluorostyrene, and 4-acryloylmorpholine into a reactor pre-filled with N,N-dimethylformamide, stir for 10 - 20 min, under nitrogen protection, add azobisisobutyronitrile, raise the temperature by oil bath, stir and react for 6 - 8 h, after the reaction ends, cool to room temperature, drop into methanol for precipitation, stand for 30 - 60 min, filter, wash, and dry for 12 - 18 h to obtain the terpolymer.

5. The preparation method of an antibacterial and mildew-proof high-glitter gold glitter powder film material according to claim 1, characterized in that, In step S2, the mass ratio of the terpolymer, deionized water, aqueous polyurethane binder, and glitter powder is (5 - 10):(30 - 40):(8 - 15):(40 - 55).

6. The preparation method of an antibacterial and mildew-proof high-shine glitter powder film material according to claim 1, characterized in that, In step S2, the power of ultrasonic dispersion is 200 - 300 W, the frequency is 40 - 50 kHz, and the stirring speed is 100 - 200 rpm.

7. The preparation method of an antibacterial and mildew-proof high-shine glitter powder film material according to claim 1, characterized in that, In step S3, the temperature of hot air drying is 60 - 70 °C, the energy density of UV lamp irradiation is 800 - 900 mJ / cm 2 , the irradiation intensity is 120 - 130 mW / cm 2 , and the temperature of heat setting treatment is 180 - 190 °C.

8. The preparation method of an antibacterial and mildew-proof high-glitter gold glitter powder film material according to claim 4, characterized in that, The mass ratio of methacrylic acid, pentafluorostyrene, 4-acryloylmorpholine, N,N-dimethylformamide, and azobisisobutyronitrile is (12 - 15):(25 - 30):(18 - 22):(150 - 180):(0.6 - 0.8).

9. The preparation method of an antibacterial and mildew-proof high-shine glitter powder film material according to claim 4, characterized in that, The temperature for raising the temperature by oil bath is 70 - 75 °C, and the stirring speed is 200 - 300 rpm.

10. An antibacterial and mildew-proof high-glitter glitter powder film material prepared by the preparation method according to any one of claims 1 - 9.

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