Impregnated bond paper with mildew-proof, antibacterial and antiviral effects and preparation process thereof

Abstract

The invention provides impregnated bond paper with mildew-proof, antibacterial and antiviral effects and a preparation process of the impregnated bond paper. The impregnated bond paper is prepared from the following raw materials in percentage by weight: 0.8 to 1.4 percent of plant extract, 45 to 57 percent of film-forming resin, 1 to 1.5 percent of calcium peroxide, 1 to 1.5 percent of protamine, 0.5 to 0.8 percent of capsid protein, 0.3 to 0.5 percent of oligosaccharide chain protein, 3 to 4 percent of nano sepiolite, 0.8 to 1.2 percent of calcium hypochlorite, 0.1 to 0.2 percent of silver-loaded nanoparticles, 6 to 8 percent of slow-release carrier, 0.6 to 0.8 percent of photoinitiator, 0.3 to 0.5 percent of surfactant, 3 to 4 percent of plasticizer, 0.1 to 0.2 percent of curing agent, 0.2 to 0.3 percent of dispersing agent and 0.2 to 0.4 percent of cross-linking agent. The anti-static coating comprises the following components in percentage by weight: 0.2-0.3% of a moisture-proof agent, 0.2-0.4% of an antioxidant, 0.1-0.3% Through cooperation of the components, the impregnated bond paper has good mildew-proof, antibacterial, antiviral and other comprehensive properties, the probability of bacterial infection and virus infection is reduced, and the practicability and safety of the impregnated bond paper applied to a floor heating environment, a humid area (such as a bathroom cabinet) or a decorative plate of a medical facility are improved.

Description

Technical Field

[0001] The invention relates to the technical field of impregnated film paper, and in particular to an impregnated film paper with mildew-proof, antibacterial and antiviral effects and a preparation process thereof. Background Art

[0002] Melamine-impregnated paper, also known as "melamine" paper, is a specially treated industrial paper primarily used for surface decoration in furniture and building materials. Made primarily from a blend of non-woven wood pulp, polyethylene, and plant fibers, it boasts abrasion resistance, a wide variety of styles, impact resistance, stain resistance, moisture resistance, and environmental friendliness. It is widely used in furniture manufacturing, building decoration, and industrial materials.

[0003] Impregnated paper is a key material for wood-based panel finishes. It's typically made from decorative paper printed with patterns or solid colors, impregnated with urea-formaldehyde or melamine-formaldehyde resin. This not only imparts a decorative aesthetic to the panels but also provides protection against wear, stains, corrosion, and scratches. It's widely used in finishes for furniture, flooring, and wall panels. However, this impregnated paper exhibits poor mildew, antibacterial, and antiviral properties. When used in underfloor heating environments, humid areas (such as bathroom cabinets), or as decorative panels in medical facilities, conventional impregnated paper struggles to inhibit the growth of molds like Aspergillus niger, leading to mold spots and discoloration on the surface, severely impacting both aesthetics and structural strength. Furthermore, the impregnated paper surface of interior decorative panels is susceptible to the accumulation of pathogens such as Escherichia coli and Staphylococcus aureus, posing a risk of cross-infection. Furthermore, viruses can be transmitted through aerosols attached to the impregnated paper surface of decorative panels, posing a safety threat. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an anti-mildew, antibacterial and antiviral impregnated film paper and a preparation process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present application discloses an impregnated film paper with mildew-proof, antibacterial and antiviral effects. The components of the impregnated film paper include the following raw materials, calculated in percentage: 0.8-1.4% plant extract, 45-57% film-forming resin, 1-1.5% calcium peroxide, 1-1.5% protamine, 0.5-0.8% capsid protein, 0.3-0.5% oligosaccharide chain protein, 3-4% nano-sepiolite, 0.8-1.2% calcium hypochlorite, 0.1-0.2% silver-loaded nanoparticles, 6-8% slow-release carrier, 0.6-0.8% photoinitiator, 0.3-0.5% surfactant, 3-4% plasticizer, 0.1-0.2% curing agent, 0.2-0.3% dispersant, 0.2-0.4% cross-linking agent, 0.2-0.3% moisture-proof agent, 0.2-0.4% antioxidant, 0.1-0.3% antistatic agent, and the balance is solvent.

[0006] Preferably, in percentage, the components of the impregnated film paper include the following raw materials: 1.1% plant extract, 51% film-forming resin, 1.2% calcium peroxide, 1.2% protamine, 0.6% capsid protein, 0.4% oligosaccharide chain protein, 3.5% nano-sepiolite, 1% calcium hypochlorite, 0.15% silver-loaded nanoparticles, 7% slow-release carrier, 0.7% photoinitiator, 0.4% surfactant, 3.5% plasticizer, 0.15% curing agent, 0.25% dispersant, 0.25% cross-linking agent, 0.25% moisture-proof agent, 0.3% antioxidant, 0.2% antistatic agent and 26.85% solvent.

[0007] By setting up the above technical scheme, the film-forming resin has good mechanical strength and water resistance; calcium peroxide slowly releases oxygen and hydrogen peroxide, and hydrogen peroxide has strong oxidizing properties, which can oxidize and destroy the viral envelope and nucleic acid, thereby achieving the purpose of inactivating the virus; fish protein, as a natural cationic antimicrobial peptide, can combine with the anionic phospholipids on the bacterial cell membrane, destroy the cell membrane structure, cause the bacterial contents to leak, and achieve broad-spectrum antibacterial; capsid protein simulates the viral capsid structure, can competitively bind to the viral receptors on the surface of the host cell, block the adsorption process of the virus and the cell, and thus prevent viral infection; oligosaccharide chain protein can activate the defense signal pathway in the cell, induce the production of antiviral proteins such as β-1,3-glucanase and chitinase, which can degrade the protective structure of the virus and inhibit the replication and spread of the virus; the unique porous structure of nano-sepiolite gives it a large specific surface area, which can It can adsorb microorganisms and serve as a carrier to load antibacterial ingredients such as calcium hypochlorite and silver-loaded nanoparticles, achieving slow release and prolonging the antibacterial effect. Calcium hypochlorite releases hypochlorous acid when it comes into contact with water. Hypochlorous acid has strong oxidizing properties and can oxidize bacterial enzyme systems, proteins and nucleic acids, quickly killing bacteria and molds. The silver ions in the silver-loaded nanoparticles have broad-spectrum antiviral activity and can bind to viral nucleic acids, interfering with the replication of viral genetic material, and can also destroy the viral envelope, making it lose its ability to infect. The photoinitiator triggers the polymerization reaction of the film-forming resin under light conditions, causing the glue to quickly solidify into a film. The coordinated action of each component can make the impregnated film paper have good comprehensive properties such as mildew resistance, antibacterial and antiviral properties, reduce the probability of bacterial and viral transmission, and improve the practicality and safety of the impregnated film paper used in floor heating environments, humid areas (such as bathroom cabinets) or decorative panels for medical facilities.

[0008] Preferably, the plant extract is composed of the following raw materials based on the proportion of total ingredients: betalain 0.3-0.5%, paeoniflorin 0.3-0.5% and linalool 0.2-0.4%.

[0009] By setting up the above technical scheme, betalain has antioxidant and certain antibacterial activity, can scavenge free radicals produced by microbial metabolism, and inhibit microbial growth; paeoniflorin has an inhibitory effect on a variety of fungi and can interfere with the physiological metabolic process of fungal cells; linalool is volatile, and its odor can inhibit the germination and growth of mold spores, and at the same time has a certain bactericidal effect.

[0010] Preferably, the extraction method of betalain is as follows: a1. Wash fresh beetroot, cut into 2-3 mm slices, dry in a 50°C oven to constant weight, and pulverize through a 60-mesh sieve. a2. Using 0.1% dilute hydrochloric acid solution, mix the beetroot powder with 50% ethanol at a solid-liquid ratio of 1:10, and perform ultrasonic extraction for 30 minutes at pH 4.5, temperature 50°C, power 400W, and frequency 40kHz; a3. After the beetroot ultrasonic extract is cooled, centrifuge it at 3800 rpm for 10 min, collect the supernatant, repeat the extraction twice with the residue in the same way, and combine the supernatants; a4. The supernatant was concentrated to 1 / 5 of its original volume by rotary evaporation at 45°C under reduced pressure, filtered through a 0.45µm filter membrane, and purified by macroporous adsorption resin column chromatography. The elution was performed with a gradient of deionized water and ethanol to obtain the betalain eluate. The extraction method of paeoniflorin is as follows: b1. Take the peony root slices, crush them through a 50-mesh sieve, and dry them at 60°C until the moisture content is less than 5%; b2. Use a 1.5% w / v cellulase and 0.8% w / v pectinase complex solution, mix the peony root powder with the complex solution at a solid-liquid ratio of 1:20, treat at pH 4.5 and 50°C for 2 hours, then use 2.5% citric acid solution as a medium, combined with 40kHz, 400W pulsed ultrasonic intermittent treatment for 30 minutes; b3. The enzymatic hydrolysate was mixed with 50% ethanol at a volume ratio of 1:15 and extracted under microwave conditions at 60°C and 600W for 15 min. b4. Filter the extract while hot, and concentrate the filtrate under reduced pressure until there is no alcohol taste. Dissolve it in water and then extract with ethyl acetate to remove impurities. Pass the aqueous phase through a polyamide column and elute with 20% ethanol to obtain the paeoniflorin eluate. The extraction method of linalool is as follows: c1. Take fresh lavender flowers, drain the water and chop them. Weigh 50g and place them in a distillation flask. Add 300mL of deionized water and heat to boiling with an electric heating mantle. Distill for 2h. Salt out the condensate with saturated NaCl solution. c2. After cooling, the distillate was transferred into a separatory funnel to separate the oil phase. The oil phase was transferred to a 20 mL headspace bottle and extracted under magnetic stirring at 40°C and 500 rpm for 30 min. c3. Dry the crude oil obtained by steam distillation with anhydrous Na2SO4, and distill under reduced pressure at 4 kPa and 60-70°C to collect the linalool fraction.

[0011] Preferably, the film-forming resin is composed of the following raw materials based on the proportion of the total components: 25-30% polyethylene glycol diacrylate, 15-20% acrylic resin and 5-7% polyurethane resin.

[0012] By implementing the above technical solution, polyethylene glycol diacrylate forms a hydrophilic gel network through photoinitiated polymerization. Acrylic resin imparts excellent mechanical strength and water resistance to the coated paper. The combination of the two forms a high-performance film-forming matrix. The polyurethane resin, containing numerous polar groups (such as urethane and urea groups) in its molecular chain, can form hydrogen bonds or chemical bonds with hydroxyl groups on the surface of paper fibers and substrates (such as wood and artificial boards), enhancing interfacial bonding. The film-forming resin composed of polyethylene glycol diacrylate, acrylic resin, and polyurethane resin effectively improves the overall properties of the impregnated coated paper, including mechanical strength, flexibility, and water resistance.

[0013] Preferably, the sustained-release carrier is a β-cyclodextrin inclusion complex, the photoinitiator is benzoin dimethyl ether or Irgacure 184, the moisture-proof agent is silica aerogel, and the solvent is composed of water and ethanol in a volume ratio of 7:3.

[0014] By implementing this technical solution, the sustained-release carrier (β-cyclodextrin inclusion complex) can encapsulate volatile or easily degradable ingredients such as linalool, paeoniflorin, betalain, and calcium hypochlorite, minimizing their loss during preparation and storage, achieving a slow release and prolonging the duration of action. Silica aerogel effectively absorbs moisture, improving the moisture-proof properties of the film paper.

[0015] Preferably, the surfactant is one or more of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, sodium oleate, and sodium dioctyl sulfosuccinate; the plasticizer is one or more of epoxy soybean oil, epoxy fatty acid methyl ester, epoxy linseed oil, polyethylene glycol, and sorbitol; the curing agent is one or more of ethylenediamine, diethylenetriamine, phthalic anhydride, maleic anhydride, and m-phenylenediamine; the dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, and sodium silicate; the cross-linking agent is one of environmentally friendly citric acid, tea polyphenols, or N,N'-methylenebisacrylamide; the antioxidant is one or more of di-tert-butylparacresol, dibutylhydroxytoluene, ascorbyl palmitate, and propyl gallate; and the antistatic agent is one of octadecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, or hexadecyltrimethylammonium chloride.

[0016] Through the above technical solution, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, sodium oleate, and sodium dioctyl sulfosuccinate are all anionic surfactants that reduce the surface tension of the system, improve the dispersion of the ingredients, and promote the wetting of the adhesive into the substrate. Epoxidized soybean oil, epoxy fatty acid methyl ester, and epoxy linseed oil are epoxy plasticizers with excellent heat and weather resistance, which can improve the stability of the adhesive paper. Polyethylene glycol and sorbitol are polyol plasticizers that increase the flexibility and hygroscopicity of the adhesive paper. Ethylenediamine, diethylenetriamine, and m-phenylenediamine are amine curing agents that react with film-forming resins and other ingredients. Sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, and sodium silicate are inorganic dispersants that achieve uniform dispersion of the components in the system through electrostatic repulsion. Antioxidants effectively prevent oxidation and deterioration of plant extracts and protein components, improving product storage stability. Antistatic agents reduce electrostatic adsorption of dust on the adhesive paper surface, preventing it from affecting its antibacterial and antiviral properties.

[0017] The present application also discloses a preparation process of an anti-mildew, antibacterial and antiviral impregnated film paper, which comprises the following steps: S1. Mix linalool, paeoniflorin, betaine, calcium hypochlorite, silver-loaded nanoparticles, and β-cyclodextrin inclusion compound, add appropriate amount of 50°C warm water, stir for 1.5 hours, and then prepare inclusion compound powder by spray drying; S2. Mix calcium peroxide and nano-sepiolite, add an appropriate amount of ethanol, disperse under 250W ultrasonic conditions for 25 minutes, and then dry at 60°C to constant weight to obtain a nano-sepiolite composite; S3. Add polyethylene glycol diacrylate, acrylic resin, and polyurethane resin to a mixed solvent of water and ethanol, and stir at 75°C until completely dissolved. Then, add a photoinitiator, surfactant, plasticizer, crosslinker, curing agent, and dispersant in sequence, and continue stirring for 30 minutes to fully mix the ingredients. S4. Add nano-sepiolite complex, protamine, capsid protein and oligosaccharide chain protein to the film-forming matrix solution obtained in S3, disperse under 300W ultrasonic conditions for 40 minutes to form a uniform and stable composite glue solution, control the solid content of the glue solution to 28-30%, then add moisture-proof agent, antioxidant and antistatic agent, and stir evenly; S5. Select 40g / m² polyester fiber non-woven fabric as the substrate, dry it at 60℃ for 2h to remove moisture, and then perform corona treatment to improve the hydrophilicity and adhesion of the substrate surface. Immerse the pre-treated substrate in the composite glue solution for 4min, and then use a roller to squeeze out excess glue at a pressure of 0.8MPa to achieve a squeeze rate of 65-67%; S6. Dry the impregnated substrate in a hot air circulation oven at 65°C for 8 minutes to remove most of the solvent, irradiate with an ultraviolet lamp with a wavelength of 365nm and a power of 1200W, control the conveyor belt speed of the substrate to 1.5m / min, cross-link and cure the polyethylene glycol diacrylate, and bake the light-cured film paper at 85°C for 15 minutes to completely cure the acrylic resin to obtain the anti-mildew, antibacterial and antiviral impregnated film paper.

[0018] Preferably, in the spray drying method of step S1, the inlet air temperature is 180°C and the outlet air temperature is 80°C.

[0019] The beneficial effects of the present invention are: The components of the present invention work together to enable the impregnated film paper to have good comprehensive properties such as mildew resistance, antibacterial and antiviral properties, reduce the probability of bacterial and viral transmission, and improve the practicality and safety of the impregnated film paper when used in decorative panels in floor heating environments, humid areas (such as bathroom cabinets) or medical facilities.

[0020] Betalain has antioxidant and certain antibacterial activity, can scavenge free radicals produced by microbial metabolism and inhibit microbial growth; paeoniflorin has an inhibitory effect on a variety of fungi and can interfere with the physiological metabolic process of fungal cells; linalool is volatile, and its odor can inhibit the germination and growth of mold spores, and at the same time has a certain bactericidal effect. The plant extract composed of these three components has good antibacterial and antibacterial properties, which improves the mildew resistance and antibacterial properties of the prepared impregnated film paper.

[0021] Polyethylene glycol diacrylate forms a hydrophilic gel network through photoinitiated polymerization. Acrylic resin imparts excellent mechanical strength and water resistance to the coated paper. The combination of the two forms a high-performance film-forming matrix. Polyurethane resin, with its molecular chain containing numerous polar groups (such as urethane and urea), can form hydrogen bonds or chemical bonds with hydroxyl groups on the surface of paper fibers and substrates (such as wood and artificial boards), enhancing interfacial bonding. The film-forming resin composed of polyethylene glycol diacrylate, acrylic resin, and polyurethane resin effectively improves the overall properties of the impregnated coated paper, including mechanical strength, flexibility, and water resistance.

[0022] The sustained-release carrier (β-cyclodextrin inclusion complex) can encapsulate volatile or easily degradable ingredients such as linalool, paeoniflorin, betalain, and calcium hypochlorite, reducing their loss during preparation and storage, achieving a slow release and prolonging the duration of action. Silica aerogel can effectively absorb moisture, improving the moisture-proof properties of the film paper. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments 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 only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Example 1: This example discloses an anti-mildew, antibacterial and antiviral impregnated film paper. The components of the impregnated film paper include the following raw materials, in percentage: betalain 0.3%, paeoniflorin 0.3%, linalool 0.2%, polyethylene glycol diacrylate 25%, acrylic resin 15%, polyurethane resin 5%, calcium peroxide 1%, protamine 1%, capsid protein 0.5%, oligosaccharide chain protein 0.3%, nano-sepiolite 3%, calcium hypochlorite 0.8%, silver-loaded nanoparticles 0.1%, β-cyclodextrin inclusion compound 6%, benzoin dimethyl ether 0.6%, surfactant 0.3%, plasticizer 3%, curing agent 0.1%, dispersant 0.2%, cross-linking agent 0.2%, silica aerogel 0.2%, antioxidant 0.2%, antistatic agent 0.1% and solvent 36.6%. The solvent is composed of water and ethanol in a volume ratio of 7:3.

[0025] The surfactant is sodium lauryl sulfate, the plasticizer is epoxidized soybean oil, the curing agent is ethylenediamine, the dispersant is, the cross-linking agent is environmentally friendly citric acid, the antioxidant is di-tert-butyl-p-cresol, and the antistatic agent is octadecyltrimethylammonium chloride.

[0026] The extraction method of betalain is as follows: a1. Wash fresh beetroot, cut into 2-3 mm slices, dry in a 50°C oven to constant weight, and pulverize through a 60-mesh sieve. a2. Using 0.1% dilute hydrochloric acid solution, mix the beetroot powder with 50% ethanol at a solid-liquid ratio of 1:10, and perform ultrasonic extraction for 30 minutes at pH 4.5, temperature 50°C, power 400W, and frequency 40kHz; a3. After the beetroot ultrasonic extract is cooled, centrifuge it at 3800 rpm for 10 min, collect the supernatant, repeat the extraction twice with the residue in the same way, and combine the supernatants; a4. The supernatant was concentrated to 1 / 5 of its original volume by rotary evaporation at 45°C under reduced pressure, filtered through a 0.45µm filter membrane, and purified by macroporous adsorption resin column chromatography. The elution was performed with a gradient of deionized water and ethanol to obtain the betalain eluate. The extraction method of paeoniflorin is as follows: b1. Take the peony root slices, crush them through a 50-mesh sieve, and dry them at 60°C until the moisture content is less than 5%; b2. Use a 1.5% w / v cellulase and 0.8% w / v pectinase complex solution, mix the peony root powder with the complex solution at a solid-liquid ratio of 1:20, treat at pH 4.5 and 50°C for 2 hours, then use 2.5% citric acid solution as a medium, combined with 40kHz, 400W pulsed ultrasonic intermittent treatment for 30 minutes; b3. The enzymatic hydrolysate was mixed with 50% ethanol at a volume ratio of 1:15 and extracted under microwave conditions at 60°C and 600W for 15 min. b4. Filter the extract while hot, and concentrate the filtrate under reduced pressure until there is no alcohol taste. Dissolve it in water and then extract with ethyl acetate to remove impurities. Pass the aqueous phase through a polyamide column and elute with 20% ethanol to obtain the paeoniflorin eluate. The extraction method of linalool is as follows: c1. Take fresh lavender flowers, drain the water and chop them. Weigh 50g and place them in a distillation flask. Add 300mL of deionized water and heat to boiling with an electric heating mantle. Distill for 2h. Salt out the condensate with saturated NaCl solution. c2. After cooling, the distillate was transferred into a separatory funnel to separate the oil phase. The oil phase was transferred to a 20 mL headspace bottle and extracted under magnetic stirring at 40°C and 500 rpm for 30 min. c3. Dry the crude oil obtained by steam distillation with anhydrous Na2SO4, and distill under reduced pressure at 4 kPa and 60-70°C to collect the linalool fraction.

[0027] This embodiment also discloses a preparation process of an anti-mildew, antibacterial and antiviral impregnated film paper, which includes the following steps: S1. Mix linalool, paeoniflorin, betalain, calcium hypochlorite, silver-loaded nanoparticles, and β-cyclodextrin inclusion compound, add appropriate amount of 50°C warm water, stir for 1.5 hours, and then prepare inclusion compound powder by spray drying with an inlet air temperature of 180°C and an outlet air temperature of 80°C; S2. Mix calcium peroxide and nano-sepiolite, add an appropriate amount of ethanol, disperse under 250W ultrasonic conditions for 25 minutes, and then dry at 60°C to constant weight to obtain a nano-sepiolite composite; S3. Add polyethylene glycol diacrylate, acrylic resin, and polyurethane resin to a mixed solvent of water and ethanol, and stir at 75°C until completely dissolved. Then, add a photoinitiator, surfactant, plasticizer, crosslinker, curing agent, and dispersant in sequence, and continue stirring for 30 minutes to fully mix the ingredients. S4. Add nano-sepiolite complex, protamine, capsid protein and oligosaccharide chain protein to the film-forming matrix solution obtained in S3, disperse under 300W ultrasonic conditions for 40 minutes to form a uniform and stable composite glue solution, control the solid content of the glue solution to 28-30%, then add moisture-proof agent, antioxidant and antistatic agent, and stir evenly; S5. Use 40g / m² polyester fiber non-woven fabric as the substrate, dry it at 60℃ for 2h to remove moisture, and then perform corona treatment (voltage: 15kV, treatment time: 30s) to improve the hydrophilicity and adhesion of the substrate surface. Immerse the pretreated substrate in the composite glue solution for 4min, and then use a roller to squeeze out excess glue at a pressure of 0.8MPa to achieve a squeeze-out rate of 65-67%; S6. Dry the impregnated substrate in a hot air circulation oven at 65°C for 8 minutes to remove most of the solvent, irradiate with an ultraviolet lamp with a wavelength of 365nm and a power of 1200W, control the conveyor belt speed of the substrate to 1.5m / min, cross-link and cure the polyethylene glycol diacrylate, and bake the light-cured film paper at 85°C for 15 minutes to completely cure the acrylic resin to obtain the anti-mildew, antibacterial and antiviral impregnated film paper.

[0028] Example 2: This example discloses an anti-mildew, antibacterial and antiviral impregnated film paper. Compared with Example 1, the differences are as follows: The components of the impregnated film paper include the following raw materials in percentage: betalain 0.5%, paeoniflorin 0.5%, linalool 0.4%, polyethylene glycol diacrylate 30%, acrylic resin 20%, polyurethane resin 7%, calcium peroxide 1.5%, protamine 1.5%, capsid protein 0.8%, oligosaccharide chain protein 0.5%, nano-sepiolite 4%, calcium hypochlorite 1.2%, silver-loaded nanoparticles 0.2%, β-cyclodextrin inclusion complex 8%, Irgacure 184 0.8%, surfactant 0.5%, plasticizer 4%, curing agent 0.2%, dispersant 0.3%, cross-linking agent 0.4%, silica aerogel 0.3%, antioxidant 0.4%, antistatic agent 0.3% and solvent 16.7%.

[0029] The solvent is composed of water and ethanol in a volume ratio of 7:3.

[0030] The surfactant is sodium dodecylbenzenesulfonate, the plasticizer is epoxy fatty acid methyl ester, the curing agent is diethylenetriamine, the dispersant is sodium pyrophosphate, the cross-linking agent is tea polyphenols, the antioxidant is butylated hydroxytoluene, and the antistatic agent is dodecyldimethylbenzyl ammonium chloride.

[0031] Example 3: This example discloses an anti-mildew, antibacterial and antiviral impregnated film paper. Compared with Example 1, the differences are as follows: Calculated in percentage, the components of the impregnated film paper include the following raw materials: betalain 0.4%, paeoniflorin 0.4%, linalool 0.3%, polyethylene glycol diacrylate 27.5%, acrylic resin 17.5%, polyurethane resin 6%, calcium peroxide 1.2%, protamine 1.2%, capsid protein 0.6%, oligosaccharide chain protein 0.4%, nano-sepiolite 3.5%, calcium hypochlorite 1%, silver-loaded nanoparticles 0.15%, β-cyclodextrin inclusion complex 7%, benzoin dimethyl ether 0.7%, surfactant 0.4%, plasticizer 3.5%, curing agent 0.15%, dispersant 0.25%, cross-linking agent 0.25%, moisture-proof agent 0.25%, antioxidant 0.3%, antistatic agent 0.2% and solvent 26.85%.

[0032] The solvent is composed of water and ethanol in a volume ratio of 7:3.

[0033] The surfactant is sodium oleate, the plasticizer is epoxy linseed oil, the curing agent is phthalic anhydride, the dispersant is sodium tripolyphosphate, the cross-linking agent is N,N'-methylenebisacrylamide, the antioxidant is ascorbyl palmitate, and the antistatic agent is hexadecyltrimethylammonium chloride.

[0034] Comparative Example 1: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that betalain is not added and a solvent in equal proportion is used instead.

[0035] Comparative Example 2: An anti-mildew, antibacterial and antiviral impregnated film paper. The only difference between the impregnated film paper and Example 3 is that paeoniflorin is not added and a solvent in equal proportion is used instead.

[0036] Comparative Example 3: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that linalool is not added and a solvent in an equal proportion is used instead.

[0037] Comparative Example 4: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that polyethylene glycol diacrylate is not added and a solvent in an equal proportion is used instead.

[0038] Comparative Example 5: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that no acrylic resin is added and an equal proportion of solvent is used instead.

[0039] Comparative Example 6: An anti-mildew, antibacterial and antiviral impregnated film paper. The only difference between the impregnated film paper and Example 3 is that no polyurethane resin is added and an equal proportion of solvent is used instead.

[0040] Comparative Example 7: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that calcium peroxide is not added and a solvent in equal proportion is used instead.

[0041] Comparative Example 8: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that protamine is not added and a solvent in an equal proportion is used instead.

[0042] Comparative Example 9: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that no capsid protein is added and an equal proportion of solvent is used instead.

[0043] Comparative Example 10: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that no oligosaccharide chain protein is added and an equal proportion of solvent is used instead.

[0044] Comparative Example 11: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that nano-sepiolite is not added and a solvent in an equal proportion is used instead.

[0045] Comparative Example 12: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that calcium hypochlorite is not added and a solvent in an equal proportion is used instead.

[0046] Comparative Example 13: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that no silver-loaded nanoparticles are added and an equal proportion of solvent is used instead.

[0047] Comparative Example 14: An impregnated film paper with mildew-proof, antibacterial and antiviral effects. The only difference between the impregnated film paper and Example 3 is that no β-cyclodextrin inclusion complex is added, and an equal proportion of solvent is used instead.

[0048] The present application conducted tests on the impregnated film papers obtained in Examples 1-3 and Comparative Examples 1-14 to test their mildew resistance, antibacterial properties, and antiviral properties, as follows: 1. Anti-mildew performance test 1. Test standard: Refer to GB / T 2423.16-2008 "Environmental testing for electric and electronic products - Part 2: Test methods, test J and guidance: mildew growth".

[0049] 2. Test methods Preparation of test samples: Cut the impregnated adhesive film papers of Examples 1-3 and Comparative Examples 1-14 into 50 mm × 50 mm specimens, and prepare 3 parallel specimens for each group.

[0050] Inoculation of mold: Select common mold species such as Aspergillus niger, Penicillium funiculosum, and Aureobasidium pullulans, and make a 10 6 −10 8 CFU / mL of spore suspension was evenly sprayed on the surface of the sample using a sterile sprayer.

[0051] Culture: Place the inoculated sample in a constant temperature and humidity incubator at 28±1°C and 95±2% relative humidity for 28 days.

[0052] Observation and rating: After the incubation, the mold growth on the surface of the sample was observed by naked eyes and rated according to the 0-4 scale (0: no mold growth; 1: mold coverage area <10%; 2: mold coverage area 10-30%; 3: mold coverage area 30-60%; 4: mold coverage area >60%).

[0053] 2. Antibacterial performance test 1. Test standard: Refer to GB / T 21551.2-2010 "Particular requirements for antimicrobial materials with antibacterial, sterilization and purification functions for household and similar electrical appliances".

[0054] 2. Test methods Bacteria selection: Escherichia coli and Staphylococcus aureus.

[0055] Preparation of bacterial suspension: inoculate the bacteria into nutrient broth medium, culture at 37℃ for 24h, and dilute with sterile saline to a concentration of about 10 5 −10 6 CFU / mL.

[0056] Sample Preparation: Cut the specimen into 25 mm x 25 mm pieces, prepare three replicates per group, and place them in sterile Petri dishes. Add 2 mL of bacterial suspension to the dish, completely soaking the specimen. For the control group, add the same volume of bacterial suspension but without the specimen.

[0057] Culture: Place the culture dish in a 37°C constant temperature incubator and culture for 24 hours.

[0058] Colony count: After incubation, place the sample in a test tube containing 10 mL of sterile saline and shake for 2 minutes to elute the bacteria. Count the colonies in the eluate using the dilution plate method and calculate the antibacterial rate (%): (number of colonies in the control group - number of colonies in the experimental group) / number of colonies in the control group × 100%.

[0059] 3. Anti-virus performance test 1. Test standard: Refer to ISO 18184:2019 "Determination of antiviral properties of textiles".

[0060] 2. Test methods Virus of choice: Influenza A virus (H1N1).

[0061] Prepare virus suspension: Culture the virus in an appropriate cell line in a biosafety laboratory, harvest the virus suspension, and dilute it to an appropriate concentration with phosphate-buffered saline (PBS).

[0062] Sample Preparation: Cut the specimens into appropriate sizes, prepare three replicates per group, and place them into the wells of a sterile culture plate. Add an appropriate amount of virus suspension to the wells to completely soak the specimens. For the control group, add the same volume of virus suspension but without the specimen.

[0063] Action: Place the culture plate in a 37°C, 5% CO2 incubator for 2 hours.

[0064] Virus inactivation assay: After the reaction is complete, place the sample in a test tube containing an appropriate amount of cell maintenance medium and shake to elute the virus. Determine the virus titer using the plaque reduction assay, and calculate the virus inactivation rate (%): (Virus titer in control group - Virus titer in experimental group) / Virus titer in control group × 100%.

[0065] 3. Test results See Table 1 for the results.

[0066] Table 1 Performance parameters of the impregnated film paper obtained in Examples 1-3 and Comparative Examples 1-14

[0067] From Table 1 we can see that: From Comparative Examples 1-2 combined with Example 3, it can be seen that without adding betalain and paeoniflorin, the mildew resistance and antibacterial properties of the impregnated film paper are affected to a certain extent, but the antiviral properties of the impregnated film paper are not significantly affected.

[0068] From Comparative Example 3 and Example 3, it can be seen that the absence of linalool has a significant effect on the mildew resistance of the impregnated film paper, has a certain effect on the mildew resistance and antibacterial properties of the impregnated film paper, and has no significant effect on the antiviral properties of the impregnated film paper.

[0069] From Comparative Examples 4-6 in combination with Example 3, it can be seen that without adding polyethylene glycol diacrylate, acrylic resin and polyurethane resin, there is no significant effect on the mildew resistance, antibacterial and antiviral properties of the impregnated film paper.

[0070] Comparative Examples 7-10 and 14, combined with Example 3, show that the absence of calcium peroxide, protamine, capsid protein, oligosaccharide chain protein, and β-cyclodextrin inclusion compound will have a certain impact on the mildew resistance of the impregnated paper. Specifically, the absence of β-cyclodextrin inclusion compound has a certain impact on the antibacterial properties of the impregnated paper; the absence of calcium peroxide, capsid protein, and oligosaccharide chain protein has a significant impact on the antiviral properties of the impregnated paper; and the absence of protamine has a significant impact on the antibacterial properties of the impregnated paper.

[0071] It can be seen from Comparative Examples 11-13 in combination with Example 3 that the absence of nano-sepiolite, calcium hypochlorite and silver-loaded nanoparticles has a significant impact on the mildew resistance and antibacterial properties of the impregnated film paper, and the absence of silver-loaded nanoparticles has a significant impact on the antiviral properties of the impregnated film paper.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mildew-proof, antibacterial and antiviral impregnated film paper, characterized in that: The components of the impregnated film paper include the following raw materials in percentage: 0.8-1.4% plant extract, 45-57% film-forming resin, 1-1.5% calcium peroxide, 1-1.5% protamine, 0.5-0.8% capsid protein, 0.3-0.5% oligosaccharide chain protein, 3-4% nano-sepiolite, 0.8-1.2% calcium hypochlorite, 0.1-0.2% silver-loaded nanoparticles, 6-8% slow-release carrier, 0.6-0.8% photoinitiator, 0.3-0.5% surfactant, 3-4% plasticizer, 0.1-0.2% curing agent, 0.2-0.3% dispersant, 0.2-0.4% cross-linking agent, 0.2-0.3% moisture-proof agent, 0.2-0.4% antioxidant, 0.1-0.3% antistatic agent, and the balance is solvent.

2. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 1, characterized in that: In percentage, the components of the impregnated film paper include the following raw materials: 1.1% plant extract, 51% film-forming resin, 1.2% calcium peroxide, 1.2% protamine, 0.6% capsid protein, 0.4% oligosaccharide chain protein, 3.5% nano-sepiolite, 1% calcium hypochlorite, 0.15% silver-loaded nanoparticles, 7% sustained-release carrier, 0.7% photoinitiator, 0.4% surfactant, 3.5% plasticizer, 0.15% curing agent, 0.25% dispersant, 0.25% cross-linking agent, 0.25% moisture-proof agent, 0.3% antioxidant, 0.2% antistatic agent and 26.85% solvent.

3. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 1, characterized in that: In terms of the proportion of total ingredients, the plant extract is composed of the following raw materials: betalain 0.3-0.5%, paeoniflorin 0.3-0.5% and linalool 0.2-0.4%.

4. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 3, characterized in that: The extraction method of betalain is as follows: a1. Wash fresh beetroot, cut into 2-3 mm slices, dry in a 50°C oven to constant weight, and pulverize through a 60-mesh sieve. a2. Using 0.1% dilute hydrochloric acid solution, mix the beetroot powder with 50% ethanol at a solid-liquid ratio of 1:10, and perform ultrasonic extraction for 30 min at pH 4.5, temperature 50°C, power 400 W, and frequency 40 kHz; a3. After the beetroot ultrasonic extract is cooled, centrifuge it at 3800 rpm for 10 min, collect the supernatant, repeat the extraction twice with the residue in the same way, and combine the supernatants; a4. The supernatant was concentrated to 1 / 5 of its original volume by rotary evaporation at 45°C under reduced pressure, filtered through a 0.45µm filter membrane, and purified by macroporous adsorption resin column chromatography. The elution was performed with a gradient of deionized water and ethanol to obtain the betalain eluate. The extraction method of paeoniflorin is as follows: b1. Take the peony root slices, crush them through a 50-mesh sieve, and dry them at 60°C until the moisture content is less than 5%; b2. Use a 1.5% w / v cellulase and 0.8% w / v pectinase complex solution, mix the peony root powder with the complex solution at a solid-liquid ratio of 1:20, treat at pH 4.5 and 50°C for 2 hours, then use 2.5% citric acid solution as a medium, combined with 40kHz, 400W pulsed ultrasonic intermittent treatment for 30 minutes; b3. Mix the enzymatic hydrolysate with 50% ethanol at a volume ratio of 1:15 and extract under microwave conditions at 60°C and 600W for 15 min; b4. Filter the extract while hot, and concentrate the filtrate under reduced pressure until there is no alcohol taste. Dissolve it in water and then extract with ethyl acetate to remove impurities. Pass the aqueous phase through a polyamide column and elute with 20% ethanol to obtain the paeoniflorin eluate. The extraction method of linalool is as follows: c1. Take fresh lavender flowers, drain the water and chop them. Weigh 50g and place them in a distillation flask. Add 300mL of deionized water and heat to boiling with an electric heating mantle. Distill for 2h. Salt out the condensate with saturated NaCl solution. c2. After cooling, the distillate was transferred into a separatory funnel to separate the oil phase. The oil phase was transferred to a 20 mL headspace bottle and extracted under magnetic stirring at 40°C and 500 rpm for 30 min. c3. Dry the crude oil obtained by steam distillation with anhydrous Na2SO4, and distill under reduced pressure at 4 kPa and 60-70°C to collect the linalool fraction.

5. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 3, characterized in that: Calculated by the proportion of total ingredients, the film-forming resin is composed of the following raw materials: polyethylene glycol diacrylate 25-30%, acrylic resin 15-20% and polyurethane resin 5-7%.

6. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 5, characterized in that: The sustained-release carrier is a beta-cyclodextrin inclusion complex, the photoinitiator is benzoin dimethyl ether or Irgacure 184, the moisture-proof agent is silica aerogel, and the solvent is composed of water and ethanol in a volume ratio of 7:

3.

7. The mildew-proof, antibacterial and antiviral impregnated film paper according to claim 6, characterized in that: The surfactant is one or more of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, sodium oleate, and sodium dioctyl sulfosuccinate; the plasticizer is one or more of epoxy soybean oil, epoxy fatty acid methyl ester, epoxy linseed oil, polyethylene glycol, and sorbitol; the curing agent is one or more of ethylenediamine, diethylenetriamine, phthalic anhydride, maleic anhydride, and m-phenylenediamine; the dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, and sodium silicate; the crosslinking agent is one of environmentally friendly citric acid, tea polyphenols, or N,N'-methylenebisacrylamide; the antioxidant is one or more of di-tert-butylparacresol, dibutylhydroxytoluene, ascorbyl palmitate, and propyl gallate; and the antistatic agent is one of octadecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, or hexadecyltrimethylammonium chloride.

8. A process for preparing the mildew-proof, antibacterial and antiviral impregnated film paper according to any one of claim 7, characterized in that: The preparation process includes the following steps: S1. Mix linalool, paeoniflorin, betaine, calcium hypochlorite, silver-loaded nanoparticles, and β-cyclodextrin inclusion compound, add appropriate amount of 50°C warm water, stir for 1.5 hours, and then prepare inclusion compound powder by spray drying; S2. Mix calcium peroxide and nano-sepiolite, add an appropriate amount of ethanol, disperse under 250W ultrasonic conditions for 25 minutes, and then dry at 60°C to constant weight to obtain a nano-sepiolite composite; S3. Add polyethylene glycol diacrylate, acrylic resin, and polyurethane resin to a mixed solvent of water and ethanol, and stir at 75°C until completely dissolved. Then, add a photoinitiator, surfactant, plasticizer, crosslinker, curing agent, and dispersant in sequence, and continue stirring for 30 minutes to fully mix the ingredients. S4. Add nano-sepiolite complex, protamine, capsid protein and oligosaccharide chain protein to the film-forming matrix solution obtained in S3, disperse under 300W ultrasonic conditions for 40 minutes to form a uniform and stable composite glue solution, control the solid content of the glue solution to 28-30%, then add moisture-proof agent, antioxidant and antistatic agent, and stir evenly; S5. Select 40g / m² polyester fiber non-woven fabric as the substrate, dry it at 60℃ for 2h to remove moisture, and then perform corona treatment to improve the hydrophilicity and adhesion of the substrate surface. Immerse the pre-treated substrate in the composite glue solution for 4min, and then use a roller to squeeze out excess glue at a pressure of 0.8MPa to achieve a squeeze rate of 65-67%; S6. Dry the impregnated substrate in a hot air circulation oven at 65°C for 8 minutes to remove most of the solvent, irradiate with an ultraviolet lamp with a wavelength of 365nm and a power of 1200W, control the conveyor belt speed of the substrate to 1.5m / min, cross-link and cure the polyethylene glycol diacrylate, and bake the light-cured film paper at 85°C for 15 minutes to completely cure the acrylic resin to obtain the anti-mildew, antibacterial and antiviral impregnated film paper.

9. The preparation process of the mildew-proof, antibacterial and antiviral impregnated film paper according to claim 8, characterized in that: In the spray drying method of step S1, the inlet air temperature is 180°C and the outlet air temperature is 80°C.

10. The process for preparing the mildew-proof, antibacterial and antiviral impregnated film paper according to claim 8, characterized in that: In step S5, the voltage of the corona treatment is 15 kV, and the treatment time is 30 s.

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