CN111841149A - Filter material for self-antibacterial disinfecting mask and manufacturing method thereof - Google Patents

Filter material for self-antibacterial disinfecting mask and manufacturing method thereof Download PDF

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Publication number
CN111841149A
CN111841149A CN202010481803.9A CN202010481803A CN111841149A CN 111841149 A CN111841149 A CN 111841149A CN 202010481803 A CN202010481803 A CN 202010481803A CN 111841149 A CN111841149 A CN 111841149A
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self
antibacterial
mask
silver
filter
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Chinese (zh)
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徐斌
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Changzhou Micro Chemical New Material Technology Co Ltd
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Changzhou Micro Chemical New Material Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1192—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with antimicrobial agent
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/30—Antimicrobial, e.g. antibacterial
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups

Abstract

The invention belongs to the technical field of daily-use protective products, and particularly relates to a filter cloth material with self-antibacterial and self-disinfecting functions for a mask and a manufacturing method thereof. The technology of the invention can avoid the defect that the existing mask filter material can only filter particles or spray but can not check and kill bacteria or viruses; meanwhile, the nano silver particles are firmly combined with the filter material fibers and only distributed on the surfaces of the filter material fibers, and compared with other silver-containing filter materials, the silver-containing nano silver filter material has the advantages of continuous industrial production, high effective utilization rate of silver, strong binding force of the silver particles and the filter material fibers, low manufacturing cost and the like.

Description

Filter material for self-antibacterial disinfecting mask and manufacturing method thereof
Technical Field
The invention relates to a filter cloth material with self-antibacterial and self-disinfecting functions for a mask, and belongs to the technical field of daily-use protective products. The self-antibacterial self-disinfecting filter material is prepared by carrying out surface treatment on the non-woven fabric or melt-blown fabric which is the raw material of the existing mask, and various mask products capable of realizing self-antibacterial disinfection can be prepared by the same method as the common mask.
Background
The main transmission routes of microorganisms such as viruses and bacteria which are transmitted from person to person are droplet and aerosol transmission, droplets which are ejected when a patient sneezes, coughs or speaks, and aerosol which is formed by mixing the droplets in the air cause infection after the contacted person inhales the respiratory tract, so that wearing the mask is a very necessary basic protection means, and the mask plays a key role in limiting the transmission and the diffusion of respiratory infectious diseases.
The machine-made disposable non-woven fabric mask is widely adopted due to the characteristics of low cost and good protection effect, but the mask still needs to be replaced every 2 to 4 hours in the using process, and secondary pollution risk is possibly brought if skin touches the polluted surface of the mask in the wearing or replacing process.
According to the research information provided by the WHO, SARS coronavirus can survive for a long time in the environment, can survive for at least 48 hours on a dry plastic surface, and can survive for a longer time in a wet or liquid environment. The novel coronavirus 2019-nCoV is similar to SARS virus, and has stronger viability and larger pathogenic risk in natural environment; pathogens that are present in the environment in a wide range of environments are generally more viable.
Viruses are the smallest, most structurally simple group of non-cellular microorganisms, consisting essentially of genetic material and proteins, in a material form intermediate between life and non-life, and a genome consisting of one or more nucleic acid molecules (DNA or RNA) which is surrounded by a protective envelope coat of proteins or lipoproteins, and coronaviruses are a group of RNA viruses having a protein envelope. When the envelope is disrupted, DNA or RNA is also very susceptible to degradation, thereby inactivating the virus.
Bacteria in the broad sense, prokaryotes, are a large group of non-nuclear membrane-encapsulated primary unicellular organisms with naked DNA called nucleosomal regions (or pseudonucleoids) present, including two broad groups of eubacteria (eubacteria) and archaea (archaea). The bacteria in the narrow sense are a class of prokaryotic microorganisms, which are short and thin in shape and simple in structure and propagate mostly in a binary division manner, are organisms which are widely distributed in the nature and have the largest number of individuals, and are main participants of natural substance circulation. The bacteria mainly comprise cell walls, cell membranes, cytoplasm, nucleoplasm and other parts, and some bacteria also have special structures such as capsules, flagella, pili, cilia and the like. The cell wall is used as the main protective structure of bacteria, the main component is peptidoglycan, and the peptidoglycan is a disaccharide unit formed by N-acetylglucosamine and N-acetylmuramic acid and connected into macromolecules by beta-1, 4 glycosidic bonds. The N-acetylmuramic acid molecule has tetrapeptide side chain, and the short peptides between adjacent glycan fibers are bridged by peptide bridges (gram positive bacteria) or peptide bonds (gram negative bacteria) to form the cell wall with peptidoglycan lamellar structure.
Silver is a natural antibacterial material used by human for thousands of years, and has the advantages of wide antibacterial spectrum and difficult generation of drug resistance. Research shows that the mechanism of silver sterilization and disinfection is mainly as follows: 1. silver reacts with exposed peptidoglycan to form reversible complexes that prevent them from transporting oxygen (energy) into the cell, preventing the vital activity of the pathogen, leading to its death. 2. Silver can bind to DNA or RNA in pathogens, pathogen spores or viruses, and silver ions bound to DNA or RNA bases form cross-links with each other, displacing hydrogen bonds between adjacent nitrogens in purines and pyrimidines, resulting in denaturation of the DNA or RNA structure, inhibiting its replication and thereby inactivating it. 3. Silver is combined with sulfydryl in metabolic enzyme of pathogen, so that the enzyme on which the microorganism depends is subjected to life activity is inactivated, the pathogen cannot be metabolized to die, and after bacterial thalli or viruses lose activity, silver ions are dissociated from the enzyme to repeatedly perform sterilization activity, so that the effect of durable antibiosis is achieved. 4. Under the action of light, silver ions can play a role of catalyzing active centers to catalyze the reaction of water molecules and oxygen in the air to form active oxygen radicals, and the free radicals with strong oxidizing property can destroy the multiplication capacity of bacteria or viruses in a short time to cause the bacteria or the viruses to die. Therefore, the silver is a high-efficiency, broad-spectrum, safe and durable sterilization and disinfection substance, and has good killing effect on various bacteria and viruses commonly existing in the living environment, such as gram-positive bacteria, gram-negative bacteria, staphylococcus aureus, streptococcus, coronavirus, HIV virus, influenza virus, hepatitis virus and the like.
The filter material of the mask product is combined with the nano silver simple substance, so that various bacteria and viruses can be efficiently killed by utilizing the huge surface area and filterability of the nano silver simple substance, and the life health of a wearer and surrounding personnel is protected.
Chinese patent CN111038012 discloses a carbon fiber composite material, which is characterized by comprising: surface coating, heat-resisting protective layer, disinfection antibacterial layer, fiber filter layer, sponge layer, substrate layer, it has one deck heat-resisting protective layer to bond on the surface coating, it has one deck disinfection antibacterial layer to bond on the heat-resisting protective layer, disinfection antibacterial layer bonds and has one deck fiber filter layer, sponge layer, substrate layer are in the same place through the mode combination of hot pressing, the surface coating surface evenly is provided with a plurality of strengthening ribs and metallic fiber net, be provided with a strengthening rib between per two metallic fiber net, surface coating is the coating of oxyhydrogen, heat-resisting protective layer is the epoxy layer, disinfection antibacterial layer is the antibiotic layer of nanometer silver light. The filter material prepared by the method can also meet the requirement of the scheme as a key raw material for antibiosis and disinfection.
Chinese invention patent CN 110584239 discloses a method for manufacturing an antibacterial mask and an antibacterial mask manufactured by the method, wherein inorganic nano antibacterial material is used as functional components, chitin or anion powder is respectively mixed to prepare the antibacterial material, then the antibacterial material is added into a film forming agent to prepare an antibacterial coating, so that the antibacterial coating is coated on a non-woven fabric, the mask is manufactured by the antibacterial non-woven fabric with the antibacterial function after drying, and further, the granular inorganic nano antibacterial material and the chitin/anion powder are uniformly distributed on the base material of the mask, so that the mask has the antibacterial function; the antibacterial mask disclosed by the invention realizes an antibacterial effect, and the air permeability of the non-woven fabric mask is not influenced after the water-based film-forming agent is dried, so that the problem that the existing mask has no antibacterial function is solved. However, in the scheme, the antibacterial material comprises an inorganic nano antibacterial material and chitin, the inorganic nano antibacterial material consists of nano zinc oxide, nano silver ion antibacterial powder and nano infrared powder, the powder is physically combined with non-woven fabric through a film forming agent, dust is easy to fall off due to poor binding force, health risk of human body inhalation exists, nano silver particles can be exposed, the proportion of the nano silver particles contacting pathogens is low, and the antibacterial and disinfection effects of the nano silver particles are difficult to fully exert.
Chinese patent CN110870923 discloses an antibacterial gauze net for burns and scalds, which adopts pure cotton gauze as a base material, and nano silver particles or silver ions of 600-2000 mg/kg are adsorbed on the surface of the gauze net. The pure cotton gauze is prepared by using high-quality long-staple cotton as a raw material, spinning 21s or 40s yarns by adopting a compact spinning process, weaving 24 × 20 or 36 × 18 warp and weft threads by adopting a skeining process, and processing by pure starch sizing and biological enzyme desizing processes. The antibacterial reticular gauze for burns and scalds is obtained by dipping or padding the pure cotton gauze in silver-containing antibacterial solution and drying. The antibacterial reticular gauze for burns and scalds is purer in antibacterial reticular cloth, low in hairiness rate and less in wound adhesion; the softness and certain rigidity of the antibacterial reticular gauze are ensured; ensuring the exudation of the exudate on the surface of the burn and scald wound; the nano silver particles or silver ions adsorbed on the surface endow the mesh gauze with excellent antibacterial performance. The scheme has a high value as an antibacterial dressing for burns and scalds, but is not suitable for manufacturing a filter material for a mask made of a non-water-absorbing material, because the common filter material for the mask is PP or PP + PE, is difficult to adsorb or retain aqueous liquid, and cannot adsorb nano silver particles or silver ions on the surface by using a simple impregnation method.
Chinese patent CN110870923 discloses a mask filter element material with bacteriostatic and protective effects, and the manufacturing method is as follows: preparing porous activated carbon; adding porous active carbon into the antibacterial medicinal material filtrate, heating to 40-50 deg.C, soaking for 5-10min with ultrasonic vibration, taking out, oven drying, mixing with Maifanitum powder, nanometer titanium dioxide, volcanic rock powder, and carboxymethyl cellulose, and adding into a mold to obtain core material; adding carbon fibers into a nitric acid solution, soaking for 10-15h, washing with water to be neutral, drying at 50-70 ℃, adding maltose and silver nitrate into water, stirring and dissolving into a uniform solution, adding the carbon fibers, carrying out ultrasonic oscillation for 5-10min, sealing, placing in a drying box, reacting at 120-140 ℃ for 50-70min, filtering out the carbon fibers, washing with water to be neutral, drying, blending with cotton fibers, preparing lining cloth, placing a core material between two pieces of lining cloth, and sewing the periphery to obtain the finished mask. The mask filter element material has certain adsorption activity on dust and PM2.5 and certain antibacterial performance, but silver with the sterilization and disinfection effects only exists on the surface of carbon fiber, and very large probability of spray or aerosol directly passes through the sterilization metal net without contacting the sterilization metal net, so that lower sterilization efficiency is caused.
The Chinese patent CN 111068406 discloses a preparation method of an antibacterial nanofiber filter material, which comprises the following steps: adding silver nitrate and a stabilizer into a liquid reducing agent, stirring until the silver nitrate and the stabilizer are dissolved, adding a polymer, stirring until the polymer is dissolved, standing and defoaming for 6-8 hours; preparing the defoamed polymer/silver solution into nano fibers by adopting an electrostatic spinning technology; and naturally drying the nano-fibers under the dark condition until the reducing agent is completely volatilized to obtain the antibacterial nano-fiber filtering material. The antibacterial nanofiber filtering material has high-efficiency filtering performance and long-acting antibacterial performance, and can be widely applied to the fields of masks for medical protection and high-efficiency air filtration. According to the scheme, a large amount of silver which cannot exert the sterilization and disinfection effects exists in the fiber, so that the cost is high and the large-scale production difficulty is high.
GB2547835 and US10238109 disclose a protein coating capable of killing viruses, which may be used as protective clothing, masks, wound dressings, antibiotic socks, mastitis cups, tampons, medical barriers or bed covers, etc. for persons who may come into contact with or be infected with viruses. It comprises a substrate and a receptor binding molecule capable of binding to the envelope of the GP Glycoprotein (GP) of the virus, the binding molecule being carrageenan or galactose oxidase, lactoferrin, whole lactoferrin, apo-lactoferrin, or galactosiron, the pathogen binding construct being bound to the carrier by a carbohydrate binding agent. The scheme is called as a virus trap, and has the greatest characteristic that the working principle of the virus trap is not like that of a traditional mask for blocking viruses, but rather, the virus trap attracts the viruses to the outer layer of fabric. Once the protein paint on the fabric contacts the virus, the outer membrane of the protein paint can be damaged, and then the protein paint can stick to the internal structure, so that the virus can be directly disappeared. However, the method of coating the fabric surface with the biological protein coating has the characteristics that the activity of the biological protein coating is greatly influenced by the external environment and specificity may exist, the activity of killing viruses is influenced by the environmental dryness, temperature, sunlight, a water washing method, time and the like, and the method hardly shows the effect on bacteria with cell wall structures, so that certain limitations exist.
International patent application WO2016/077504 discloses a mask for covering the facial area of a wearer comprising a mask body constructed primarily of a material comprising an annular metal or annular metal alloy, wherein the annular metal or annular metal alloy is the primary structural component of the mask body. The mask body covers at least a portion of the wearer's mouth, nose, or mouth and nose when worn on the wearer's face. The filtering portion of the mask includes a sterilizing metal mesh or a sterilizing metal alloy mesh for providing sterilizing action, air purification and self-sterilization. The mesh of the sterilizing metal net adopted by the scheme is large (0.00555 inch), the diameter of the mesh is far larger than that of the conventional spray or aerosol, and the spray or aerosol can directly pass through the sterilizing metal net without contacting the sterilizing metal net, so that the sterilizing efficiency is low.
Through retrieval and analysis, the existing scheme has no safe filter material manufacturing method for the antibacterial and disinfectant mask, which is suitable for continuous and efficient industrial production.
Disclosure of Invention
The invention designs a set of method suitable for industrial scale production of filter material for an antibacterial and disinfectant mask, and the purpose and the effect of the invention are achieved by the following specific technical scheme:
(1) Discharging: the constant-speed constant-tension discharging is realized by adopting a low-tension power discharging device, and the used raw materials can be various mask filter materials for large-scale industrial production, including various non-woven fabrics, melt-blown fabrics, spun-bonded fabrics, hot-air cotton fabrics, needle-punched fabrics, ES matte fabrics and the like;
(2) degreasing: the filter material surface has oily pollutants and poor hydrophilicity, and the process aims to remove dirt on the surface of the cloth, so that the cloth is hydrophilic and can be quickly and uniformly soaked by water in the chemical roughening solution, uniform roughening is ensured, and the binding force of the nano silver layer is improved. The degreasing solution can adopt various commercial alkaline degreasing agents or aqueous solutions of sodium hydroxide and a surfactant;
(3) washing with water: washing the degreasing fluid carried by the filter material;
(4) acid washing: the surface is neutralized, and the sensitization liquid is prevented from being polluted;
(5) sensitization: for adsorbing Sn on the surface of filter material2+Becoming a sensitization center;
(6) washing with water: the sensitizing solution carried by the filter material is washed away to avoid pollution;
(7) and (3) activation: activating a sensitization center to promote the activity of a sensitization target;
(8) pre-silver: the simple substance silver is reduced by the sensitization center and becomes an autocatalysis center, so that the silver precipitation liquid is prevented from being polluted, and the service life of the silver precipitation liquid is prolonged;
(9) Silver deposition: depositing a large amount of nano silver particles on the surface of the filter material;
(10) washing with water: silver plating solution carried by the filter material is washed away, so that the cost is reduced and the pollution is reduced;
(11) surface modification: the surface of the filter material is modified by the cationic surfactant, so that the wetting angle of droplets of the droplets is reduced, and the antibacterial and disinfecting performance is further enhanced;
(12) drying: removing the attached water for long-term storage, preferably by hot air drying;
(13) receiving: a low-tension power material receiving device is adopted to realize constant-speed constant-tension rolling;
(14) and (6) inspecting and packaging.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages that:
(1) the invention only attaches silver particles with nanometer particle size and thickness on the surface of the mask filter material, and does not change the original filtering performance and physical performance of the filter material, so the invention can still mechanically produce according to the conventional production process, does not need to change the production equipment and process of mask production units, and can produce the self-antibacterial disinfecting mask by changing raw materials;
(2) compared with the mask made of the conventional filter material, the mask made by the invention can kill bacteria and viruses filtered on the mask, avoid secondary pollution caused by careless operation, realize longer service life of the mask, and can be reused even after being cleaned in principle, thereby greatly reducing the use cost of users;
(3) In the scheme of the invention, the nano silver is combined with the filter material fiber by a chemical bond, so that the nano silver has good binding force, does not have nano silver particles which are bonded by some physical coating methods, and has no harm of falling off of nano particles and entering into a human body, thereby having high safety;
(4) in the scheme of the invention, the silver particles are in a nanometer scale, and the diameter of the fibers or the size of the filter holes is not changed after the silver particles are combined on the surface of the filter material fibers, so that the ventilation resistance, the filtering efficiency and the comfort of the manufactured mask are not changed;
(5) in the scheme of the invention, the nano silver particles are fully exposed and leaked without being coated by an adhesive coating or other materials, so that the nano silver sterilizing agent has extremely high biological sterilization and disinfection activity and high effective utilization rate of silver;
(6) the scheme of the invention adopts the nano-scale silver elementary substance particles instead of silver salts, thereby having non-dissolution property and causing no allergy or toxicity to users;
(7) in the scheme of the invention, the surface of the filter material is also combined with a cationic surfactant safe to human body, and the cationic surfactant also has certain sterilization capability, so that the cationic surfactant and the nano-silver particles have synergistic effect to further enhance the sterilization capability;
(8) the scheme of the invention also modifies the hydrophilicity of the filter material, so that droplet of the droplet can immediately infiltrate the filter material after being filtered by the filter material, and the contact between the droplet of;
(9) The scheme of the invention is suitable for industrial continuous production, is easy to realize stable process control and has low manufacturing cost.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the manufacturing method of the filter material of the present invention, wherein 1 is a power constant speed material-releasing roll; 2 is a discharging tension adjusting roller; 3 is a degreasing mother tank, wherein a device for controlling liquid level and temperature (not shown in the figure) is arranged in the degreasing mother tank; 4 is a degreasing agent groove, and the filter material is pressed into a degreasing agent solution by a guide roller and soaked in the degreasing agent solution; 5, an acid and alkali resistant pump is used for continuously pumping the tank liquor of each mother tank into the corresponding son tank, and the tank liquor overflows from the son tank and returns to the mother tank, so that tank liquor circulation is realized; 7, a water washing mother tank after degreasing; 8 is an acid pickling sub-tank; 9 is a pickling mother tank; 10 is a sensitizing subslot; 11 is a sensitization mother tank; 12 is a sensitizing water washing tank; 13 is a sensitization washing mother tank; 14 is an activator tank; 15 is an activation mother tank; 16 is a pre-silver groove; 17 is a pre-silver mother groove; 18 is a silver immersion sub-groove; 19 is a silver precipitation mother tank; 20 is a silver precipitation water washing sub-tank; 21 is a silver-precipitating washing mother tank; 22 is a surface modifier sub-groove; 23 is a surface modified mother groove; 24 is a drying box; 25 is a receiving tension adjusting roller; and 26 is a material collecting roll.
Detailed Description
The first embodiment is as follows: as shown in figure 1, the manufacturing method of the novel self-antibacterial sterilizing filter material for the mask comprises the following main steps:
(1) the method comprises the steps of (1) carrying out power discharging, wherein the rotating speed of a discharging motor is controlled according to tension information detected by a discharging tension adjusting roller, so that constant-tension discharging and stable constant-speed production are realized;
(2) degreasing: cleaning with alkaline degreasing agent, and one preferable formulation is NaOH 150 + -100 g/L, Na2CO330±20 g/L，Na3PO430 plus or minus 20 g/L, 0.5 plus or minus 0.5 g/L of alkylphenol polyoxyethylene, 0.5 plus or minus 0.5 g/L of sodium dodecyl sulfate or sodium dodecyl sulfate and a proper amount of antifoaming agent, wherein the temperature is controlled at 60 plus or minus 20 ℃;
(3) after degreasing, washing the degreased waste water until the washing water is neutral, and adopting multi-stage countercurrent washing to improve the efficiency;
(4) acid washing: neutralize the surface of the filter fiberTo activate the surface to a certain extent, a preferred formulation is one containing H2SO4100 plus or minus 40 g/L, 0.5 plus or minus 0.5 g/L of nonionic surfactant, and the temperature is controlled within the range of 30 plus or minus 20 ℃;
(5) sensitization: SnCl 215 plus or minus 10 g/L, 40 plus or minus 20 mL/L of concentrated HCl (37 plus or minus 3 percent), a small quantity of tin bars or tin particles, keeping undissolved metal tin in the bath solution continuously, and controlling the temperature to be about 30 plus or minus 20 ℃;
(6) after sensitization, washing the membrane until the washing water is neutral, and adopting multi-stage countercurrent washing to improve the efficiency;
(7) And (3) activation: activating the surface of the filter material fiber by adopting special low-cost activating liquid so as to be convenient for chemically depositing nano silver particles;
(8) pre-silver: and after activation, the silver precipitation solution with lower concentration enters a pre-silver process, and the pre-silver process mainly starts the autocatalytic reaction initially, prevents the silver precipitation tank liquor with higher cost from being polluted, and prolongs the service life of the tank liquor. The pre-silvering solution is prepared by adopting a conventional chemical silvering system, and one preferable formula is AgNO-containing33 plus or minus 2 g/L, a proper amount of ammonia water (only enough to make the plating solution clear and transparent), 30 plus or minus 15 mL/L of HCHO (37 plus or minus 3 percent), a proper amount of surfactant, and the temperature is controlled to be 30 plus or minus 20 ℃, so that the long-time production stability of the industrial scale is considered, the silver deposition of a silver-ammonia solution system is not used as much as possible to avoid the generation of explosive precipitates, and the silver deposition amount is adjusted by controlling the material receiving and discharging speed of the filter material;
(9) silver deposition: fully chemical autocatalytic reaction to generate a large amount of nano silver particles on the surface of the filter material fiber for firm adhesion, and one preferable formula is AgNO-containing310 +/-5 g/L, a proper amount of ammonia water (only enough to make the plating solution clear and transparent), 30 +/-15 mL/L of HCHO (37 +/-3%), a proper amount of surfactant, and controlling the temperature at 30 +/-20 ℃;
(10) after silver precipitation, washing the silver by water until the washing water is neutral, and adopting multi-stage countercurrent washing to improve the efficiency;
(11) Surface modification: the cationic surfactant solution with the antibacterial and bactericidal effects is adopted for treatment, so that the hydrophilicity of the surface of the filter material fiber is enhanced, droplet infiltration and dispersion of droplets of the droplets are facilitated, the droplets of;
(12) drying: drying the filter material by hot air convection, wherein the temperature is not more than 75 ℃;
(13) constant tension material collection: and under the action of a receiving tension adjusting roller, winding the filter material deposited with the nano silver particles by adopting set tension to obtain the finished product of the filter material for the self-antibacterial disinfecting mask.
Example two: the difference from the first example is that PdCl is used in the activation process2The acid solution is activated, and then a pure water washing process is added to wash the filter material to be neutral, and then the silver pre-treatment process is also carried out. The other steps are the same as in the first embodiment, wherein a preferred formula of the palladium activating solution is as follows: PdCl20.15 +/-0.1 g/L, concentrated HCl (37 +/-3%) 25 +/-10 mL/L, and the temperature is controlled at 30 +/-20 ℃.
Example three: the difference from the second embodiment is that a dispergation process is added after the activation and water washing process, and then the silver pre-processing process is also performed, and other steps are the same as those in the first embodiment.
While there have been shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other embodiments without departing from the spirit or essential characteristics thereof, and that the invention may be embodied in other specific forms including, but not limited to, adjustment of various process tank formulations, operating conditions, flow process adjustments, etc.; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A filter cloth material with self-antibacterial and self-disinfecting functions for a mask and a manufacturing method thereof are characterized in that the filter material is a conventional filter material for the mask and comprises various non-woven fabrics, melt-blown fabrics, spun-bonded fabrics, hot air cotton fabrics, needle-punched fabrics, ES matt fabrics and the like.
2. The filter cloth material for the mask with the self-antibacterial and self-disinfecting functions as claimed in claim 1, wherein the filter material is used for efficiently killing microorganisms such as bacteria or viruses in a broad spectrum by carrying out a chemical autocatalytic reaction to reduce and deposit nano-scale silver particles on the surface.
3. The filter cloth material for the mask with the self-antibacterial and self-disinfecting functions as claimed in claim 1, wherein a human body-safe cationic surfactant is further combined on the surface of the filter cloth material, and the cationic surfactant and the nano-silver particles are synergistic to further enhance the sterilization and disinfection capability of the filter cloth material.
4. The filter cloth material for masks with self-antibacterial and self-disinfecting functions as claimed in claim 1, wherein the surface of the filter cloth is hydrophilized to allow the fibers to be soaked with a bath solution, which facilitates cleaning and the related chemical reactions.
5. The filter cloth material for the mask with the self-antibacterial and self-disinfecting functions as claimed in claim 1, and the manufacturing method thereof are characterized by comprising the working procedures of emptying, degreasing, acid washing, sensitizing, activating, pre-silvering, silver depositing, drying, material receiving and the like.
6. The filter cloth material for masks having self-antibacterial and self-disinfecting functions as claimed in claim 5, wherein the activation comprises palladium-containing activation and non-palladium activation.
CN202010481803.9A 2020-05-27 2020-05-27 Filter material for self-antibacterial disinfecting mask and manufacturing method thereof Pending CN111841149A (en)

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CN113731020B (en) * 2021-09-06 2022-08-26 赵勤 Novel biological gel medical mask filter material and preparation method thereof

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Application publication date: 20201030