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

Abstract

The present invention relates to the technical field of decorative films, and in particular to an antibacterial and mildew-proof high-flash glitter powder film material and a preparation method thereof, comprising the following steps: S1, taking a biaxially oriented PET film substrate, cleaning and dusting the surface, corona treating it, preheating it, vacuum evaporating a silver layer, cooling it, and removing it from the chamber to obtain a silver-plated PET film; S2, adding a terpolymer to deionized water, ultrasonically dispersing it, adding a water-based polyurethane binder, stirring it, adding glitter powder, and continuing to stir it to obtain a functional coating slurry; S3, evenly coating the functional coating slurry on the surface of the silver-plated PET film, drying it with hot air, curing the coating with UV light, heat-setting it in a nitrogen atmosphere, and winding it up to obtain the antibacterial and mildew-proof high-flash glitter powder film material prepared by the present invention has good optical properties and good antibacterial properties.

Description

Technical Field

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

[0002] Glitter film boasts exceptional shimmering effects and a variety of color variations, making it a widely used decorative material in packaging, high-end crafts, and high-end cosmetics packaging. Glitter, commonly known as sequins, gold flakes, silver flakes, or gold and silver powder, was originally made by meticulously cutting high-gloss electroplated films of varying thicknesses, resulting in a highly shimmering finish. Over time, its materials have expanded from a single type to include PET, PVC, OPP, and metallic silver, while its shapes have expanded from squares and hexagons to rectangles and prisms. Its colors are also increasingly diverse, encompassing laser, solid color, iridescent, and rainbow-colored series. Glitter film is widely used in mid- to high-end packaging and decoration. In wine packaging, it can be used on wine boxes to enhance the matte texture and scratch resistance. In gift decoration, it can be applied to the surfaces of gifts and wedding supplies, adding a sparkling effect and a festive atmosphere. In cosmetics packaging, it can be applied through hot stamping to create a three-dimensional brand logo, balancing aesthetics and protection. In architectural decoration, it can be applied as a film to glass curtain walls and interior panels, enhancing the visual impact of a space.

[0003] In many application scenarios, such as food packaging, cosmetic packaging, and interior decoration materials, film materials face complex and diverse microbial threats. The existing antimicrobial agents for glitter powder films have a narrow antimicrobial spectrum and can only inhibit some bacteria, with poor inhibitory effects on molds and fungi. In humid environments or environments rich in organic matter, molds and fungi are very easy to breed, causing mildew spots and discoloration on the film materials, affecting the appearance and safety of use. The existing antimicrobial agents for film materials have poor durability and will decompose and volatilize due to factors such as light, humidity, and temperature, or react with the film material components to become ineffective. In addition, high-glitter glitter powder films are highly favored in the fields of packaging and decoration for their unique glitter effect, but the existing technology often affects the distribution and reflective properties of the glitter powder when adding antibacterial and mildew-proof ingredients, resulting in a deterioration in the glitter effect of the film material. For example, in cosmetic packaging, 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 technology, 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 solutions:

[0006] A method for preparing an antibacterial and mildew-proof high-glitter glitter powder film material comprises the following steps:

[0007] S1. Take the biaxially oriented PET film substrate, clean the surface and remove dust, corona treat for 10-20 minutes, preheat, and place it under the basic vacuum degree ≤5×10 -3 Pa, operating vacuum ≤ 2×10 -2 Under Pa conditions, the silver layer was vacuum evaporated, and after cooling, the silver-coated PET film was obtained.

[0008] S2. Add the terpolymer to deionized water, ultrasonically disperse for 20-30 minutes, add a water-based polyurethane binder, stir for 10-20 minutes, add glitter powder with an average particle size of 80-150 μm and a thickness of 0.02-0.05 μm, and continue stirring for 5-10 minutes to obtain a functional coating slurry;

[0009] S3, the functional coating slurry is evenly coated on the surface of the silver-plated PET film by blade coating or gravure coating, and the wet coating amount is controlled at 45-60g / m 2 , hot air drying for 2-4 hours, irradiation curing coating with UV lamp with main wavelength of 320-400nm, exposure time 6-7s, heat setting treatment for 10-12s in nitrogen atmosphere, winding, and obtaining antibacterial and mildew proof high flash glitter powder film material.

[0010] Furthermore, in step S1, the corona power is 1.4-1.6 kW / m, the processing speed is 20-25 m / min, and the material is preheated to 150-160°C.

[0011] Furthermore, in step S1, the evaporation rate of the silver layer during vacuum evaporation is 0.4-0.6 nm / s, the coating thickness is 0.08-0.12 μm, and the temperature is cooled to 60-65°C.

[0012] Furthermore, the terpolymer in step S2 is prepared by the following steps:

[0013] Methacrylic acid, pentafluorostyrene and 4-acryloylmorpholine are added to a reactor pre-charged with N,N-dimethylformamide and stirred for 10-20 minutes. Under nitrogen protection, azobisisobutyronitrile is added, the oil bath is heated, and the reaction is stirred for 6-8 hours. After the reaction is completed, the mixture is cooled to room temperature and slowly added dropwise into vigorously stirred methanol to precipitate a white fibrous precipitate. The mixture is allowed to stand for 30-60 minutes, filtered, and the precipitate is washed with methanol and dried for 12-18 hours to obtain a terpolymer.

[0014] Furthermore, in step S2, the mass ratio of the terpolymer, deionized water, water-based polyurethane binder and glitter powder is (5-10): (30-40): (8-15): (40-55), the water-based polyurethane binder is anionic or non-ionic, has a solid content of 30-50%, and a viscosity of 100-500 mPa·s.

[0015] Furthermore, 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.

[0016] Furthermore, in step S3, the temperature of hot air drying is 60-70°C, and the energy density of UV lamp irradiation is 800-900mJ / cm 2 , irradiation intensity is 120-130mW / cm 2 , the temperature of heat setting treatment is 180-190℃.

[0017] Furthermore, 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).

[0018] Furthermore, the oil bath is heated to a temperature of 70-75° C., and the stirring speed is 200-300 rpm.

[0019] According to another aspect of the present invention, an antibacterial and mildew-proof high-glitter glitter powder film material prepared by the above-mentioned preparation method is provided.

[0020] Beneficial effects of the present invention:

[0021] 1. In the technical solution of the present invention, glitter powder is a micron-sized flaky metal particle with a facet 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 a point-like highlight. Another part of the light, after reflecting from the silver layer, penetrates the glitter powder a second time, and is refracted / scattered by its facets to form diffuse reflection. The superposition of mirror reflection and diffuse reflection creates a dynamic three-dimensional flickering effect visually.

[0022] 2. In the technical solution of this invention, the pentafluorostyrene units in the terpolymer impart fluorinated segments with extremely low surface energy. During the final coating heat-setting treatment, the polymer segments acquire high mobility. Driven by the thermodynamic principle of surface energy minimization, the fluorinated segments spontaneously migrate to the outermost surface of the coating, where they accumulate and arrange themselves in an orderly manner. This creates a physical barrier composed of dense fluorine atoms, similar to a fluoropolymer, on the coating surface, significantly reducing the presence of water, organic pollutants, and microorganisms.

[0023] 3. In the technical solution of the present invention, the copolymer molecular chain runs throughout the entire coating. The polar functional groups on the chain, particularly the carboxyl groups provided by the methacrylic acid units and the morpholine rings provided by the 4-acryloylmorpholine units, together constitute the antibacterial mechanism. The carboxyl groups can be weakly ionized in the material microenvironment. Through electrostatic interactions and localized changes in pH, they interfere with the charged bacterial cell membrane potential and stability, endowing the coating with long-lasting, broad-spectrum antibacterial properties while significantly reducing the risk of failure and resistance associated with traditional dissolution-based antimicrobial agents.

[0024] 4. In the aqueous slurry, its hydrophobic pentafluorostyrene chain segments 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 DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Preparation Example 1

[0027] The terpolymer is prepared by the following steps:

[0028] 120 g of methacrylic acid, 250 g of pentafluorostyrene and 180 g of 4-acryloylmorpholine were added to a reactor pre-charged with 1500 g of N,N-dimethylformamide and stirred at 200 rpm for 10 min. Under nitrogen protection, 6 g of azobisisobutyronitrile was added, the oil bath was heated to 70°C, and the reaction was stirred at 200 rpm for 6 h. After the reaction was completed, the mixture was cooled to room temperature and slowly added dropwise to 3 times the volume of the reaction solution in vigorously stirred methanol to precipitate a white fibrous precipitate. The mixture was allowed to stand for 30 min, filtered, washed with methanol, and dried at 40°C for 12 h to obtain a terpolymer.

[0029] Preparation Example 2

[0030] The terpolymer is prepared by the following steps:

[0031] 132 g of methacrylic acid, 277 g of pentafluorostyrene and 204 g of 4-acryloylmorpholine were added to a reactor pre-charged with 1700 g of N,N-dimethylformamide, and stirred at 250 rpm for 15 min. Under nitrogen protection, 7 g of azobisisobutyronitrile was added, the oil bath was heated to 72°C, and the reaction was stirred at 250 rpm for 7 h. After the reaction was completed, the mixture was cooled to room temperature and slowly added dropwise to 3 times the volume of the reaction solution in vigorously stirred methanol to precipitate a white fibrous precipitate. The mixture was allowed to stand for 45 min, filtered, and the precipitate was washed with methanol and dried at 40°C for 16 h to obtain a terpolymer.

[0032] Preparation Example 3

[0033] The terpolymer is prepared by the following steps:

[0034] 150 g of methacrylic acid, 300 g of pentafluorostyrene and 220 g of 4-acryloylmorpholine were added to a reactor pre-charged with 1800 g of N,N-dimethylformamide and stirred at 300 rpm for 20 min. Under nitrogen protection, 8 g of azobisisobutyronitrile was added, the oil bath was heated to 75°C, and the reaction was stirred at 300 rpm for 8 h. After the reaction was completed, the mixture was cooled to room temperature and slowly added dropwise to 3 times the volume of the reaction solution in vigorously stirred methanol to precipitate a white fibrous precipitate. The mixture was allowed to stand for 60 min, filtered, washed with methanol, and dried at 40°C for 18 h to obtain a terpolymer.

[0035] Example 1

[0036] A method for preparing an antibacterial and mildew-proof high-glitter glitter powder film material comprises the following steps:

[0037] S1. Take the biaxially oriented PET film substrate, clean the surface and remove dust, and corona treat for 10 minutes with a corona power of 1.4kW / m and a treatment speed of 20m / min. After preheating to 150℃, under a basic vacuum degree of 5×10 -3 Pa, operating vacuum 2×10 -2 Under Pa conditions, a silver layer was vacuum evaporated at an evaporation rate of 0.4 nm / s and a coating thickness of 0.08 μm. After cooling to 60°C, the film was taken out of the chamber to obtain a silver-coated PET film.

[0038] S2. Add 5 parts of the terpolymer prepared in Preparation Example 1 to 30 parts of deionized water, ultrasonically disperse for 20 minutes, the ultrasonic dispersion power is 200 W, the frequency is 40 kHz, 8 parts of water-based polyurethane binder are added, and stirred at a speed of 100 rpm for 10 minutes. 40 parts of glitter powder with an average particle size of 80 μm and a thickness of 0.02 μm are added, and stirring is continued at a speed of 100 rpm for 5 minutes to obtain a functional coating slurry;

[0039] S3, the functional coating slurry is evenly coated on the surface of the silver-plated PET film by blade coating, and the wet coating amount is controlled at 45g / m 2 , dried with hot air at 60℃ for 2h, and cured by UV lamp with a main wavelength of 320nm and an energy density of 800mJ / cm 2 , irradiation intensity is 120mW / cm 2 , exposure time 6s, heat setting treatment at 180℃ for 10s in a nitrogen atmosphere, and winding to obtain antibacterial and mildew-proof high-flash glitter powder film material.

[0040] Example 2

[0041] A method for preparing an antibacterial and mildew-proof high-glitter glitter powder film material comprises the following steps:

[0042] S1, take the biaxially oriented PET film substrate, clean the surface and remove dust, corona treat for 15 minutes, the corona power is 1.5kW / m, the treatment speed is 22m / min, preheat to 155℃, and then place it under the basic vacuum degree of 5×10 -3 Pa, operating vacuum 2×10 -2 Under Pa conditions, a silver layer was vacuum evaporated at an evaporation rate of 0.5 nm / s and a coating thickness of 0.09 μm. After cooling to 62 °C, the film was taken out of the chamber to obtain a silver-coated PET film.

[0043] S2. Add 7 parts of the terpolymer prepared in Preparation Example 2 to 33 parts of deionized water, ultrasonically disperse for 25 minutes, the ultrasonic dispersion power is 250 W, the frequency is 45 kHz, add 10 parts of aqueous polyurethane binder, stir at a speed of 150 rpm for 15 minutes, add 50 parts of glitter powder with an average particle size of 100 μm and a thickness of 0.03 μm, and continue stirring at a speed of 150 rpm for 7 minutes to obtain a functional coating slurry;

[0044] S3, the functional coating slurry is evenly coated on the surface of the silver-plated PET film by blade coating, and the wet coating amount is controlled at 50g / m 2 , hot air drying at 65℃ for 3h, and irradiation curing with UV lamp with main wavelength of 350nm and energy density of 850mJ / cm 2 , irradiation intensity is 125mW / cm 2 , exposure time 6.5s, heat setting treatment at 185℃ for 11s in a nitrogen atmosphere, and winding to obtain antibacterial and mildew-proof high-flash glitter powder film.

[0045] Example 3

[0046] A method for preparing an antibacterial and mildew-proof high-glitter glitter powder film material comprises the following steps:

[0047] S1. Take the biaxially oriented PET film substrate, clean the surface and remove dust, and corona treat for 20 minutes with a corona power of 1.6kW / m and a treatment speed of 25m / min. After preheating to 160℃, under a basic vacuum degree of 5×10 -3 Pa, operating vacuum 2×10 -2 Under Pa conditions, a silver layer was vacuum evaporated at an evaporation rate of 0.6 nm / s and a coating thickness of 0.12 μm. After cooling to 65°C, the film was taken out of the chamber to obtain a silver-coated PET film.

[0048] S2. Add 10 parts of the terpolymer prepared in Preparation Example 3 to 40 parts of deionized water, ultrasonically disperse for 30 minutes, the ultrasonic dispersion power is 300 W, the frequency is 50 kHz, add 15 parts of aqueous polyurethane binder, stir at a speed of 200 rpm for 20 minutes, add 55 parts of glitter powder with an average particle size of 150 μm and a thickness of 0.05 μm, and continue stirring at a speed of 200 rpm for 10 minutes to obtain a functional coating slurry;

[0049] S3, the functional coating slurry is evenly coated on the surface of the silver-plated PET film by blade coating, and the wet coating amount is controlled at 60g / m 2 , hot air drying at 70℃ for 4h, and irradiation with UV lamp with a main wavelength of 400nm and an energy density of 900mJ / cm 2 , irradiation intensity is 130mW / cm 2 , exposure time 7s, heat setting treatment at 190℃ for 12s in a nitrogen atmosphere, and winding to obtain antibacterial and mildew-proof high-flash glitter powder film.

[0050] Comparative Example 1

[0051] 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 of Preparation Example 1.

[0052] Comparative Example 2

[0053] 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.

[0054] Comparative Example 3

[0055] 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.

[0056] Comparative Example 4

[0057] The difference between this comparative example and Example 1 is that the product prepared in Comparative Example 1 is used instead of the terpolymer prepared in Preparation Example 1, and the remaining steps are the same as in Example 1.

[0058] Comparative Example 5

[0059] The difference between this comparative example and Example 2 is that the product prepared in Comparative Example 2 is used instead of the terpolymer prepared in Preparation Example 2, and the remaining steps are the same as in Example 2.

[0060] Comparative Example 6

[0061] The difference between this comparative example and Example 3 is that the product prepared in Comparative Example 3 is used instead of the terpolymer prepared in Preparation Example 3, and the remaining steps are the same as in Example 3.

[0062] Comparative Example 7

[0063] The difference between this comparative example and Example 3 is that the terpolymer prepared in Preparation Example 3 is not added, and the remaining steps are the same as those in Example 3.

[0064] The membrane materials prepared in Examples 1-3 and Comparative Examples 4-7 were cut into 5×5 cm² samples, immersed in 70% ethanol for disinfection for 30 minutes, taken out and rinsed with sterile PBS buffer three times, and air-dried for 1 hour to obtain the samples for use.

[0065] Take frozen Staphylococcus aureus (ATCC 6538) and inoculate it in 10 mL TSB, shake and culture at 37℃ for 18 hours, take 1 mL of the bacterial solution and centrifuge it at 3000 rpm for 10 minutes, discard the supernatant, resuspend and wash twice with PBS buffer, and adjust the concentration to 100 μg / mL with normal saline. CFU / mL. Add 100 μL of bacterial solution to the center of the sample surface and cover with a sterile PE film of 4×4 cm². Press gently to ensure that the bacterial solution contacts the surface evenly and avoid air bubbles. Incubate the inoculated sample in a 37°C, 90% RH incubator for 24 hours. Remove the sample and place it in a sterile centrifuge tube containing 10 mL of PBS buffer and vortex for 2 minutes. Take 1 mL of the eluate and make 10 -1 , 10 -2 , 10 -3 Gradient dilution. Take 100 μL of each dilution and evenly spread it on a nutrient agar plate. Each dilution is repeated three times. Incubate at 37°C for 24 hours. Count the number of colonies (CFU) visible to the naked eye on the plate and calculate the viable bacterial concentration and inhibition rate. The calculation formula is as follows:

[0066] Live bacterial concentration of eluate (CFU / mL) = average colony count × dilution factor × 10

[0067] Antibacterial rate (%) = (1- ) × 100

[0068] The results are shown in Table 1:

[0069] Table 1. Test results of antibacterial performance of membrane materials against Staphylococcus aureus

[0070]

[0071] Refer to ASTM D523 "Standard Test Method for Specular Gloss" and ASTM D1003 "Standard Test Method for Haze and Light Transmittance of Transparent Plastics". The film materials prepared in Examples 1-3 and Comparative Examples 4-7 were cut into 100×100mm² specimens, with 3 parallel specimens in each group. The non-woven fabric was soaked with anhydrous ethanol, and the surface was wiped in one direction. The specimens were left to stand for 15 minutes in a dust-free environment until the solvent was completely evaporated, and the specimens were obtained for use. The specimens were fixed on the test bench to ensure that there were no wrinkles. The specular gloss was tested with a gloss meter. Five points (center + four corners, spacing ≥ 20 mm) were tested. The incident angle was set to 60°, the measuring aperture was Φ10mm, and the reading stabilization time was 3s. Each group of specimens was measured 3 times, and the average gloss value (GU) of each group was calculated. After the test, the specimens were removed and placed in the sample holder of the haze meter to ensure that there were no bubbles / scratches. The total light transmittance (T t ), and then measure the scattered light transmittance (T d ), each group measured 3 different areas, took the average value, and calculated the haze, haze (%) = (T d / T t ) × 100. The results are shown in Table 2:

[0072] Table 2. Film optical performance test results

[0073]

[0074] As shown in Table 1, the membrane materials of Examples 1-3 have significant antibacterial effects on Staphylococcus aureus, with inhibition rates exceeding 98%. In contrast, the inhibition rates of Comparative Examples 4-7 are significantly reduced. The addition of the ternary copolymer in Examples 1-3 significantly improves the antibacterial properties of the membrane materials, which may be due to the inhibitory effect of certain groups in the ternary copolymer on bacteria, or the formation of an antibacterial layer on the surface of the membrane material by the ternary copolymer. In Comparative Examples 4-7, the absence of any monomer in the ternary copolymer or its replacement results in a significant decrease in antibacterial properties. This indicates that the antibacterial properties of the ternary copolymer depend on its specific chemical structure, particularly the synergistic effect of methacrylic acid, pentafluorostyrene, and 4-acryloylmorpholine.

[0075] As can be seen from Table 2, the films 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 film, thereby increasing the gloss and reducing the haze. This may be because the terpolymer forms a uniform coating on the surface of the film, reducing the scattering and reflection of light. In Comparative Examples 4-7, the optical properties of the film are reduced by not adding or replacing a certain monomer in the terpolymer. This may be due to the lack of certain key groups or structures in the terpolymer, which makes the surface of the film rough or uneven, thereby increasing the scattering and reflection of light.

[0076] The methacrylic acid in the terpolymer may contain reactive groups, such as carboxyl groups, which can interact with components of bacterial cell walls or membranes, disrupting bacterial structure and function. The fluorine atoms in pentafluorostyrene are highly electronegative, potentially causing electrostatic repulsion on bacteria, thereby inhibiting their attachment and growth. 4-Acryloylmorpholine, through its unique chemical structure, may interact with bacteria and interfere with their metabolic processes. The coating formed by the terpolymer on the film surface may have a uniform thickness and a smooth surface, thereby reducing light scattering and reflection and enhancing gloss. Furthermore, the coating may reduce defects and impurities within the film, lowering the haze value.

[0077] In summary, the films prepared in Examples 1-3 have good antibacterial and optical properties.

[0078] Throughout the specification, reference to terms such as "Preparation," "Example," or "Examples" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or preparation are included in at least one embodiment or preparation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or preparation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or preparations.

[0079] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for preparing an antibacterial and mildew-proof high-flash glitter powder film material, characterized in that: The following steps are involved: S1. Take a biaxially oriented PET film substrate, clean and remove dust from the surface, corona treat for 10-20 minutes, preheat, vacuum evaporate a silver layer, cool and remove from the chamber to obtain a silver-coated PET film; S2. Add the terpolymer to deionized water, ultrasonically disperse for 20-30 minutes, add the water-based polyurethane binder, stir for 10-20 minutes, add the glitter powder, and continue stirring for 5-10 minutes to obtain a functional coating slurry; S3. Evenly apply the functional coating slurry on the surface of the silver-plated PET film, dry it with hot air for 2-4 hours, cure the coating with UV lamp, and perform heat setting treatment for 10-12 seconds under nitrogen atmosphere. Then, roll it up to obtain an antibacterial and mildew-proof high-flash glitter powder film material. Wherein, the terpolymer in step S2 comprises the following steps to prepare: Add methacrylic acid, pentafluorostyrene and 4-acryloylmorpholine to a reactor pre-charged with N,N-dimethylformamide, stir for 10-20 minutes, add azobisisobutyronitrile under nitrogen protection, heat in an oil bath, stir and react for 6-8 hours, cool to room temperature after the reaction, dropwise add methanol to precipitate, let stand for 30-60 minutes, filter, wash, and dry for 12-18 hours to obtain a terpolymer; 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).

2. The method for preparing an antibacterial and mildew-proof high-flash glitter powder film according to claim 1, characterized in that: In step S1, the corona power is 1.4-1.6 kW / m, the processing speed is 20-25 m / min, and the material is preheated to 150-160°C.

3. The method for preparing an antibacterial and mildew-proof high-flash glitter powder film according to claim 1, characterized in that: In step S1, the evaporation rate of the silver layer during vacuum evaporation is 0.4-0.6 nm / s, the coating thickness is 0.08-0.12 μm, and the temperature is cooled to 60-65° C.

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

5. The method for preparing an antibacterial and mildew-proof high-flash glitter powder film 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.

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

7. The method for preparing an antibacterial and mildew-proof high-flash glitter powder film according to claim 1, characterized in that: The temperature of the oil bath was raised to 70-75°C, and the stirring speed was 200-300 rpm.

8. An antibacterial and mildew-proof high-glitter glitter powder film material prepared by the preparation method according to any one of claims 1 to 7.

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