CN116491727B - Moisture-proof mask filter cotton and preparation method and application thereof - Google Patents

Moisture-proof mask filter cotton and preparation method and application thereof Download PDF

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Publication number
CN116491727B
CN116491727B CN202310321809.3A CN202310321809A CN116491727B CN 116491727 B CN116491727 B CN 116491727B CN 202310321809 A CN202310321809 A CN 202310321809A CN 116491727 B CN116491727 B CN 116491727B
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layer
moisture
mask
filter cotton
mass
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CN116491727A (en
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赵兴雷
蒋攀
华婷
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Jiaxing Furuibang New Material Technology Co ltd
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Jiaxing Furuibang New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • 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
    • 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
    • A41D31/12—Hygroscopic; Water retaining
    • 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
    • A41D31/14—Air permeable, i.e. capable of being penetrated by gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/266—Drying gases or vapours by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/026—Knitted fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
    • C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
    • C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/726—Permeability to liquids, absorption

Abstract

The invention provides filter cotton for a moistureproof mask, and a preparation method and application thereof, wherein the filter cotton for the moistureproof mask comprises the following components from outside to inside: the electrostatic adsorption layer, the filter layer, the moisture absorption layer and the nanometer melt-blown fiber medium layer are bonded by the polyvinyl acetal glue. Wherein the electrostatic adsorption layer is of a wavy structure, the thickness of the coating is 20-30 mu m, the height from the wave crest to the wave trough is 1-10mm, the distance from the wave crest to the wave crest is 1-10mm, the filter layer is formed by weaving polytetrafluoroethylene fibers, the thickness is 0.5-1mm, the moisture absorption layer is formed by mixing and weaving a water absorption polymer and polypropylene-based carbon fibers, the thickness is 2-4mm, and the thickness of the nano-jet melt fiber medium layer is 0.1-1mm. The filter cotton for the moistureproof mask has good protective performance, excellent air permeability and moisture permeability, and good application prospect in the field of mask preparation.

Description

Moisture-proof mask filter cotton and preparation method and application thereof
Technical Field
The invention relates to the technical field of mask filter elements, in particular to moisture-proof mask filter cotton and a preparation method and application thereof.
Background
Atmospheric particulates are one of the major environmental factors due to coal burning, industrial emissions, road dust emissions, and the like. PM2.5 refers to particles with an aerodynamic equivalent diameter of less than or equal to 2.5 microns in the atmosphere, which are also called lung-entering particles, PM2.5 has small particle size, is rich in a large amount of toxic and harmful substances, has long residence time in the atmosphere and long conveying distance, and has great influence on human health and atmospheric environment quality. In recent years, new coronaviruses spread, and atmospheric particulates can be used as viral vectors, and become a way for epidemic spread. There is no specific and effective solution to these problems, and wearing a mask is a simple and important protective measure.
The mask is a sanitary and epidemic prevention article, which is generally worn on the mouth and nose part and is used for filtering air entering the mouth and nose so as to achieve the effect of blocking harmful gases, smell, spray, viruses and other substances, and is made of gauze or paper and other materials. The mask has a certain filtering effect on air entering the lung, and has a very good effect when the mask is worn in environments with epidemic respiratory tract infectious diseases and dust pollution.
The filtration of the mask comprises surface filtration, deep filtration and filter cake filtration. The filter material has a certain size of gaps, and when the diameter of the particles is larger than the gaps, the particles are intercepted on the filter material, and the filter mode is surface filtration; if the surface screening occurs at the deep part of the filtering material, the deep part filtering is performed; the material with the three-dimensional space structure can generate deep filtration on particles with parts far smaller than the space of the material, and the phenomenon is deep filtration; with the continuous progress of filtration, a filter cake is formed on the filter material, and the filter cake plays a role of a further layer of filter material for filtering the filter cake. In the fiber filtration, the deep filtration mechanism is the most complex, and the filtration effect is the best. Four mechanisms exist for capturing particles by depth filtration: interception, inertial collision, brownian motion diffusion and electrostatic action, thereby achieving the purpose of protection. The filtering performance of the mask mainly depends on the performance of filtering cotton, and the filtering cotton can be divided into four types of synthetic fiber filtering cotton, non-woven fabric filtering cotton, glass fiber filtering cotton and active carbon filtering cotton according to different materials. The masks in the current market mainly comprise a common civil mask, a medical protective mask, a functional mask and the like. Because of the reasons of huge profit space, low attention of consumers to quality and the like, the mask market is complicated, and most masks are too heavy in filtering protection performance so as to neglect the guarantee of comfort performance. For example, the N95 and KN95 series masks mainly sold in the market have capturing capacity as high as more than 95%, but have strict tightness and poor air permeability, are extremely easy to cause discomfort to human bodies and further cause dyspnea. When the mask is worn, the influence of the hot and humid comfort of the mask on the face is obvious, if the hot and humid gas generated by breathing cannot be effectively transmitted, physiological discomfort can be caused, and bacteria can be easily bred in the humid mask. Therefore, the air permeability, heat and moisture comfort of the filter cotton of the mask should be emphasized.
Patent WO2022056768A1 discloses a moisture-proof mask, including the mask body, the mask body comprises non-woven fabrics inlayer and waterproof skin, and non-woven fabrics inlayer and waterproof skin enclose into the cavity, have put the filter layer in the cavity, and it has a plurality of bleeder vents that set up side by side to open on the waterproof skin, is equipped with the net bag on the non-woven fabrics inlayer, has placed hydrophilic cotton piece in the net bag, spouts the steam at the gauze mask inboard when wearing the gauze mask through hydrophilic cotton piece to make the gauze mask inboard keep dry and comfortable, but its air permeability is not enough. Chinese patent CN108158087a discloses a waterproof vapor mask, which adopts a method of setting a breathing cavity separately, uses an activated carbon adsorption filter element layer and electrostatic filter cotton as filter layers, solves the problem that the ventilation effect is poor due to the fact that the moisture in the existing mask is accumulated and condensed and then applied to skin and moisture infiltrates a filter plate, but the moisture resistance and the moisture permeability of the waterproof vapor mask are still to be further improved.
Therefore, in order to better satisfy the demands of practical production and consumers, it is necessary to provide a filter cotton for moisture-proof mask having excellent air permeability and moisture permeability while having good protective performance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the filter cotton for the moistureproof mask, which has strong air permeability, good moisture permeability and good protective performance, so as to meet the requirements of actual production and consumers.
To achieve the purpose, the technical scheme of the invention is as follows:
the invention provides filter cotton for a moistureproof mask, which comprises the following components from outside to inside: the electrostatic adsorption layer, the filter layer, the moisture absorption layer and the nanometer melt-blown fiber medium layer are bonded by the polyvinyl acetal glue.
In some embodiments of the invention, the electrostatic adsorption layer has a wavy structure with a coating thickness of 20-30 μm (e.g., 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, 30 μm, or any value therein), a peak-to-trough height of 1-10mm (e.g., 1mm, 3mm, 5mm, 7mm, 10mm, or any value therein), and a peak-to-peak spacing of 1-10mm (e.g., 1mm, 3mm, 5mm, 7mm, 10mm, or any value therein).
In some embodiments of the invention, the electrostatic adsorption layer is attached to the polytetrafluoroethylene fiber woven filter layer by polyvinyl acetal glue.
In some embodiments of the invention, the electrostatic adsorption layer comprises a resin, a photocurable monomer, and an additive, wherein the mass ratio of resin to photocurable monomer is 1:0.5-1 (e.g., may be 1:0.5, 1:0.7, 1:1, or any value therein); the additives include photoinitiators and hollow foam microspheres.
In some embodiments of the invention, the resin has the following structural formula:
wherein R is methyl or H; x is one or a combination of more of methyl, ethyl, butyl, propyl, isopropyl, octyl, isooctyl, phenyl, benzyl and isobornyl; a is an integer of 1-5, and b is an integer of 5-50.
In some embodiments of the present invention, the method of preparing the resin comprises the steps of:
(1) Adding acrylic acid, methyl methacrylate and acrylic ester compounds into propylene glycol methyl ether, uniformly mixing, and adding an initiator after the mixing is completed, and uniformly mixing to obtain a liquid to be titrated;
(2) Adding propylene glycol methyl ether into a reactor, and heating to 80-110 ℃;
(3) Dripping the solution to be titrated into a reactor for 3-5 hours, and then reacting for 2-4 hours at the temperature of 80-110 ℃ to obtain the resin.
In the preparation method of the resin, the molar ratio of the acrylic acid, the methyl methacrylate and the acrylic ester compound in the step (1) is 1:1-3:3-5 (e.g., may be 1:1:3, 1:2:3, 1:3:3, 1:3:4, 1:3:5, or any value therein); the molar amount of propylene glycol methyl ether is 5 to 10 times (e.g., may be 5 times, 6 times, 7 times, 8 times, 9 times, 10 times, or any value therein) that of acrylic acid; the acrylic ester compound is selected from one or more of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, isopropyl methacrylate, octyl methacrylate, phenyl methacrylate, benzyl methacrylate and isobornyl methacrylate; the initiator is selected from azobisisobutyronitrile or dibenzoyl peroxide, and the mass of the initiator is 3-5% (e.g. may be 3%, 4%, 5% or any value therein) of the total mass of acrylic acid, methyl methacrylate and butyl methacrylate.
In the method for producing a resin of the present invention, the molar amount of propylene glycol methyl ether in the step (2) is 1 to 3 times (for example, may be 1, 2, 3 or any value thereof) the total molar amount of acrylic acid, methyl methacrylate and butyl methacrylate.
In some embodiments of the invention, the method of preparing the electrostatic adsorption layer comprises the steps of:
(1) Uniformly mixing the resin and the photo-curing monomer at 30-50 ℃;
(2) And adding the photoinitiator and the hollow foaming microspheres, and uniformly mixing to obtain the electrostatic adsorption layer.
In the method for preparing the electrostatic adsorption layer of the present invention, the photo-curing monomer in the step (1) is selected from one or more combinations of 1, 6-hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate and pentaerythritol tetraacrylate, and the mass of the photo-curing monomer is 1-5% of the sum of the mass of the resin and the photo-curing monomer (for example, may be 1%, 2%, 3%, 4%, 5% or any value thereof).
In the method for producing an electrostatic adsorption layer of the present invention, the photoinitiator in the step (2) is selected from the group consisting of the photoinitiator 184 and the photoinitiator 1173, the mass of the photoinitiator is 1 to 10% of the mass sum of the resin and the photo-curing monomer (for example, may be 1%, 3%, 5%, 7%, 10% or any value thereof), and the hollow foaming microsphere is selected from any one of the group consisting of F-50, F-82 and F103K, MSH-500 manufactured by Japanese pine oil and fat pharmaceutical Co., ltd, the mass of which is 0.3 to 0.6% of the mass sum of the resin and the photo-curing monomer (for example, may be 0.3%, 0.4%, 0.5%, 0.6% or any value thereof).
In some embodiments of the invention, the filter layer is woven from polytetrafluoroethylene fibers having a thickness of 0.5-1mm (e.g., may be 0.56mm, 0.57mm, 0.58mm, 0.59mm, 0.6mm, 0.61mm, 0.62mm, 0.63mm, 0.64mm, 0.65mm, 0.66mm, 0.67mm, 0.68mm, 0.69mm, 0.7mm, 0.71mm, 0.72mm, 0.73mm, 0.74mm, 0.75mm, 0.76mm, 0.77mm, 0.78mm, 0.79mm, 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.9mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, or any of these values).
In some embodiments of the invention, the moisture-absorbing layer is woven from a mixture of a water-absorbing polymer and polypropylene-based carbon fibers and has a thickness of 2-4mm (e.g., may be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, or any value thereof).
In some embodiments of the invention, the water-absorbing polymer is powdered sodium polyacrylate-coated polysulfone hollow fibers having a pore size of 1-2mm (e.g., 1mm, 1.3mm, 1.5mm, 1.7mm, 2mm, or any value therein).
In some embodiments of the invention, the method of preparing the water-absorbing polymer comprises the steps of:
(1) Dissolving sodium polyacrylate solid in deionized water for standby;
(2) Completely immersing polysulfone hollow fiber into an aqueous solution of sodium polyacrylate, standing for 10-15 minutes, and taking out;
(3) And (3) drying the product obtained in the step (2), and crushing the dried product into powder at a low temperature to obtain the water-absorbing polymer.
In the preparation method of the water-absorbent polymer, the mass ratio of the sodium polyacrylate to the water in the step (1) is 1:1-2 (which may be, for example, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, or any value therein).
In the method for producing a water-absorbent polymer of the present invention, the drying temperature in the step (3) is 90 to 110 ℃ (for example, 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃, 95 ℃, 96 ℃, 97 ℃, 98 ℃, 99 ℃, 100 ℃, 101 ℃, 102 ℃, 103 ℃, 104 ℃, 105 ℃, 106 ℃, 107 ℃, 108 ℃, 109 ℃, 110 ℃, or any temperature value thereof may be used).
In the process for the preparation of the water-absorbent polymers according to the invention, the drying time in step (3) is 3 to 5 hours (for example, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours or any value thereof).
In some embodiments of the invention, the nanojet melt fiber media layer has a minimum DEHS particle filtration efficiency of greater than or equal to 25%.
In some embodiments of the invention, the nanojet melt fiber media layer comprises a fiber filtration layer and a polymer coating layer, the nanojet melt fiber media layer having a thickness of 0.1 to 1mm (e.g., may be 0.1mm, 0.3mm, 0.5mm, 0.7mm, 1mm, or any value therein).
In some embodiments of the invention, the fibrous filter layer includes micro-glass fibers, a wetting agent, and a melt additive.
In some embodiments of the invention, the wetting agent is selected from the group consisting of surfactants.
In some embodiments of the invention, the surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium dodecyl phosphate, sodium dodecyl diphenyl ether disulfonate.
In some embodiments of the invention, the surfactant is 0.05-0.1% by mass (e.g., may be 0.05%, 0.07%, 0.09%, 0.1% or any value therein) of the microglass fibers.
In some embodiments of the invention, the melt additive is ethoxylated castor oil.
In some embodiments of the invention, the melt additive is 1-3% by mass (e.g., may be 1%, 2%, 3%, or any value therein) of the microglass fibers.
In some embodiments of the invention, the polymeric coating comprises one or more combinations selected from the group consisting of acrylates, carboxylic acids, sulfonates, polyols, amines, silicon-containing compounds.
In some embodiments of the invention, the mass of the polymer coating is 0.01% -5% (e.g., can be 0.1%, 1%, 3%, 5% or any value therein) of the nanojet melt fiber media layer.
In some embodiments of the present invention, the method for preparing the nano-blown melt fiber medium layer comprises: and mixing the micro glass fiber with a wetting agent, then adding the polymer coating and a melt additive, and uniformly mixing to obtain the nano melt-blown fiber medium layer.
A preparation method of filter cotton for a moistureproof mask comprises the following steps:
(1) Uniformly mixing polypropylene-based carbon fibers with a water-absorbing polymer, and then braiding to form a moisture-absorbing layer;
(2) Heating to soften the polyvinyl acetal glue, then taking the nano-blown fiber medium layer as a bottom, coating the polyvinyl acetal glue on the nano-blown fiber medium layer, and then covering the moisture absorption layer prepared in the step (1);
(3) Coating the electrostatic adsorption layer on a die, rapidly drying the solvent under an infrared lamp at 100-110 ℃, heating to 130-170 ℃ to enable the microspheres to be fully foamed, and curing and shaping the coating after foaming is finished;
(4) And (3) taking the composite filter cotton obtained in the step (2) as a bottom, softening the polyvinyl acetal glue at 110-120 ℃, and covering the filter layer woven by the electrostatic adsorption layer and the polytetrafluoroethylene fiber to obtain the filter cotton for the moistureproof mask.
In the preparation method of the filter cotton for the moistureproof mask, the mass ratio of the polypropylene-based carbon fiber to the water-absorbing polymer in the step (1) is as follows: 1000:1-5 (which may be, for example, 1000:1, 1000:1.1, 1000:1.2, 1000:1.3, 1000:1.4, 1000:1.5, 1000:1.6, 1000:1.7, 1000:1.8, 1000:1.9, 1000:2, 1000:2.1, 1000:2.2, 1000:2.3, 1000:2.4, 1000:2.5, 1000:2.6, 1000:2.7, 1000:2.8, 1000:2.9, 1000:3, 1000:3.1, 1000:3.2, 1000:3.3, 1000:3.4, 1000:3.5, 1000:3.6, 1000:3.7, 1000:3.8, 1000:3.9, 1000:4, 1000:4.1, 1000:4.2, 1000:4.4.4, 1000:4.5, 1000:4.6, 1000:4.7, 1000:4.8, 1000:4.9, or any value therein).
In the method for producing the filter cotton for moisture-proof mask of the present invention, the heating temperature in the step (2) is 110 to 120 ℃ (for example, 110 ℃, 111 ℃, 112 ℃, 113 ℃, 114 ℃, 115 ℃, 116 ℃, 117 ℃, 118 ℃, 119 ℃, 120 ℃ or any temperature value thereof may be used).
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the filter cotton for the moistureproof mask, the electrostatic adsorption layer is arranged on the basis of the nano-jet melt fiber medium layer, a three-dimensional wavy structure is formed through a foaming process, most dust pollution can be blocked, and in addition, as substances rich in carboxylic acid groups are used in the electrostatic adsorption layer material, electrostatic adsorption effect is achieved on small-size pollution, and the small-size pollution is changed into large-size pollutant, so that the dust pollution is blocked outside; the middle part is matched with the filter layer woven by polytetrafluoroethylene fibers, so that toxic and harmful substances can be effectively blocked, the filter cotton for the moistureproof mask has higher filter efficiency, and the filter cotton for the moistureproof mask is endowed with good protection effect.
(2) According to the filter cotton for the moistureproof mask, the moisture absorption layer is added, and the moisture absorption polymer in the moisture absorption layer can effectively absorb and remove damp and hot air exhaled by a human body, so that the mask is prevented from being wet by exhaled moisture and the use of the mask is prevented from being influenced.
(3) The filter cotton for the moistureproof mask provided by the invention takes the water-absorbing polymer as a key raw material, the inside of the water-absorbing polymer is polysulfone hollow fiber, the outside of the water-absorbing polymer is wrapped with sodium polyacrylate with strong water absorption function, and under the condition that the sodium polyacrylate absorbs water to expand, the hollow fiber can still keep the circulation of gas, so that the problem of unsmooth breathing is avoided, and the moistureproof mask has good air permeability.
Drawings
FIG. 1 is a schematic view of an electrostatic adsorption layer with a wavy structure according to the present invention;
FIG. 2 is a GPC chart of an electrostatic adsorption layer material prepared in accordance with the present invention.
Detailed Description
The invention will be described below in connection with specific embodiments. The following examples are illustrative of the present invention and are not intended to limit the present invention. Other combinations and various modifications within the spirit of the invention may be made without departing from the spirit or scope of the invention.
In the examples below, the compounds and related reagents used were all commercially available, with polysulfone hollow fibers from Huachang polymers Inc. of the university of North America and photoinitiator 184 from Guangzhou City, inc.; the glass fiber is purchased from Jining Honjun glass fiber Limited company, the polypropylene-based carbon fiber is purchased from Anhui New Polycarbon fiber Limited company, and the polytetrafluoroethylene carbon fiber is purchased from Dongguan Bai Phoenix Plastic Material Limited company.
Preparation of the resin
(1) Adding 1mol of acrylic acid, 3mol of methyl methacrylate and 3mol of butyl methacrylate into 10mol of propylene glycol methyl ether, uniformly mixing, and adding 15g of azodiisobutyronitrile after the mixing is completed, uniformly mixing to obtain a solution to be titrated;
(2) Adding 10mol of propylene glycol methyl ether into a reactor, and heating to 100 ℃;
(3) And (3) dropwise adding the solution to be titrated into a reactor for 5 hours, and then carrying out heat preservation reaction for 4 hours at 110 ℃ to obtain the resin.
Preparation of electrostatic adsorption layer
(1) Uniformly mixing 10g of resin with 5g of 1, 6-hexanediol diacrylate at 30 ℃;
(2) Adding 0.15g of photoinitiator 184 and 0.75g of hollow foaming microsphere MSH-500, and uniformly mixing to obtain the electrostatic adsorption layer.
The height of the wave-shaped wave crest to the wave trough is 9mm, the distance between the wave crest and the wave crest is 3mm, the thickness of the coating is 25 mu m, and the GPC result is that: m is M n :3150 daltons, mw:6343 daltons, M z :12803 daltons, MP:4493 polydispersity: 2.013, M z +1:26084 daltons, first reactor residence time: 34.489 minutes, second reactor retention time 41.354 minutes, GPC chart shown in FIG. 2.
Preparation of Water-absorbing Polymer I
(1) Dissolving 100g of sodium polyacrylate solid in 100g of deionized water for later use;
(2) 50g of polysulfone hollow fiber (with the pore diameter of 1 mm) is completely immersed into an aqueous solution of sodium polyacrylate, and is taken out after being left for 10 minutes;
(3) And (3) drying the product obtained in the step (2) for 2 hours at 90 ℃, then drying the product for 2 hours at 110 ℃, and crushing the product into powder at low temperature after the drying is finished, thus obtaining the required water-absorbing polymer I.
Preparation of Water-absorbent Polymer II
(1) 100g of sodium polyacrylate solid is dissolved in 200g of deionized water for standby;
(2) 50g of polysulfone hollow fiber (pore diameter of 2 mm) is completely immersed into an aqueous solution of sodium polyacrylate, and is taken out after being left for 10 minutes;
(3) And (3) drying the product obtained in the step (2) for 2 hours at 90 ℃, then drying the product for 2 hours at 110 ℃, and crushing the product into powder at low temperature after the drying is finished, thus obtaining the required water-absorbing polymer II.
Preparation of nano-jet-melt fiber medium layer I
100g of micro glass fiber is mixed with 0.1g of sodium dodecyl sulfate, then 5g of methyl acrylate and 1g of ethoxylated castor oil are added, and the mixture is uniformly mixed to obtain a nano-spray melt fiber medium layer I, and the thickness of the nano-spray melt fiber medium layer I is 1mm.
Preparation of nano-jet-melt fiber medium layer II
100g of micro glass fiber is mixed with 0.05g of sodium dodecyl sulfate, then 5g of methyl acrylate and 3g of ethoxylated castor oil are added, and the mixture is uniformly mixed to obtain a nano-spray melt fiber medium layer II, and the thickness of the nano-spray melt fiber medium layer II is 0.1mm.
Example 1
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, the 1mm filter layer, the 4mm moisture absorption layer and the 1mm nanometer melt-blown fiber medium layer are bonded by the polyvinyl acetal adhesive.
The preparation method comprises the following steps:
(1) Uniformly mixing 100g of polypropylene-based carbon fiber with 0.5g of water-absorbing polymer I, and weaving to form a moisture-absorbing layer;
(2) Heating 20g of polyvinyl acetal glue to 110 ℃ to soften the polyvinyl acetal glue, then taking the nano-blown melt fiber medium layer as a bottom, coating the polyvinyl acetal glue on the nano-blown melt fiber medium layer, and then covering the moisture absorption layer prepared in the step (1);
(3) Coating the electrostatic adsorption layer on a die, rapidly drying the solvent under an infrared lamp at 110 ℃, heating to 130 ℃ to enable the microspheres to be fully foamed, and curing and shaping the coating after foaming is finished;
(4) And (3) coating polyvinyl acetal glue on the composite filter cotton obtained in the step (2) by taking the composite filter cotton as a bottom, and covering a filter layer woven by an electrostatic adsorption layer and polytetrafluoroethylene fibers to obtain the filter cotton for the moistureproof mask.
Example 2
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, the 1mm filter layer, the 4mm moisture absorption layer and the 1mm nanometer melt-blown fiber medium layer are bonded by the polyvinyl acetal adhesive.
The preparation method comprises the following steps:
(1) Uniformly mixing 100g of polypropylene-based carbon fiber with 0.5g of water-absorbing polymer II, and weaving to form a moisture-absorbing layer;
(2) Heating 20g of polyvinyl acetal glue to 110 ℃ to soften the polyvinyl acetal glue, then taking the nano-blown melt fiber medium layer as a bottom, coating the polyvinyl acetal glue on the nano-blown melt fiber medium layer, and then covering the moisture absorption layer prepared in the step (1);
(3) Coating the electrostatic adsorption layer on a die, rapidly drying the solvent under an infrared lamp at 110 ℃, heating to 130 ℃ to enable the microspheres to be fully foamed, and curing and shaping the coating after foaming is finished;
(4) And (3) coating polyvinyl acetal glue on the composite filter cotton obtained in the step (2) by taking the composite filter cotton as a bottom, and covering a filter layer woven by an electrostatic adsorption layer and polytetrafluoroethylene fibers to obtain the filter cotton for the moistureproof mask.
Example 3
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, the 2mm filter layer, the 4mm moisture absorption layer and the 1mm nanometer melt-blown fiber medium layer are bonded by the polyvinyl acetal adhesive.
The preparation method is the same as in example 2.
Example 4
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, the filter layer with the thickness of 0.5mm, the moisture absorption layer with the thickness of 4mm and the nano-blown fiber medium layer with the thickness of 1mm are bonded through polyvinyl acetal glue.
The preparation method is the same as in example 2.
Example 5
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, the filter layer with the thickness of 0.5mm, the moisture absorption layer with the thickness of 1mm and the nano-blown fiber medium layer with the thickness of 1mm are bonded through polyvinyl acetal glue.
The preparation method is the same as in example 2.
Example 6
The filter cotton for the moisture-proof mask comprises the following parts from outside to inside: the electrostatic adsorption layer, a filter layer with the thickness of 0.5mm, a moisture absorption layer with the thickness of 1mm and a nano-blown fiber medium with the thickness of 0.1mm are bonded through polyvinyl acetal glue.
The preparation method is the same as in example 2.
Comparative example 1
The difference from example 1 is that: no moisture absorbing layer is added.
Comparative example 2
The difference from example 1 is that: no water-absorbing polymer is added.
Comparative example 3
The difference from example 1 is that: the added water-absorbing polymer lacks polysulfone hollow fibers.
Comparative example 4
The difference from example 1 is that: the added water-absorbing polymer lacks sodium polyacrylate.
Comparative example 5
The difference from example 1 is that: the filter layer woven by tetrafluoroethylene fiber is absent.
Comparative example 6
The difference from example 1 is that: no electrostatic adsorption layer was added.
Comparative example 7
The difference from example 1 is that: no nano-blown fiber medium layer is added.
The filter cotton for the moistureproof mask prepared in the above examples and comparative examples was subjected to performance test, and the test method is as follows:
(1) Air permeability: the test is carried out by referring to the standard GB/T5453-1997 determination of air permeability of textile fabrics;
(2) Moisture permeability: testing was performed with reference to standard GB/T12704-1991;
(3) Filtration efficiency: the test was performed with reference to standard GB 2626-2006.
The measurement results are shown in Table 2:
table 2 results of measurement of index related to filter cotton for moisture-proof mask of examples and comparative examples
Numbering device Filtration efficiency (%) Air permeability (mm.s) -1 ) Moisture permeability (g.m) -2 ·24h -1 )
Example 1 95.9 3483 4451
Example 2 95.8 3483 4448
Example 3 95.6 3484 4445
Example 4 95.4 3486 4437
Example 5 95.2 3488 4434
Example 6 95.1 3490 4432
Comparative example 1 90.8 3435 4261
Comparative example 2 91.2 3433 4285
Comparative example 3 92.8 3435 4283
Comparative example 4 92.7 3477 4279
Comparative example 5 88.3 3478 4381
Comparative example 6 83.5 3465 4389
Comparative example 7 84.6 3464 4287
As can be seen from comparison of the test results of comparative examples 1, 2, 3, 4 and 5 and example 1, the moisture-proof mask filter cotton prepared in example 1 has remarkably improved moisture permeability by combining the moisture-proof layer with the filter layer, and has good moisture-proof and water-proof properties, because the water-absorbing polymer can effectively absorb and remove hot and humid air exhaled by human body, and the filter layer can also prevent the influence of external moisture; as is clear from comparison of comparative example 3 with example 1, the filter cotton for moisture-proof mask prepared in example 1 can effectively maintain the circulation of gas by adding polysulfone hollow fibers, so that the filter cotton for moisture-proof mask prepared has good air permeability; as is clear from comparison between comparative example 5 and example 1, the filter cotton for moisture-proof mask prepared in example 1 can effectively improve the filtration efficiency of the filter cotton for moisture-proof mask by adding the filter layer woven by polytetrafluoroethylene fibers, and block the toxic and harmful substances, so that the filter cotton for moisture-proof mask has good filtration effect, and comparison between comparative example 6 and comparative example 7 and example 1 shows that the filter cotton for moisture-proof mask prepared in example 1 is provided with the electrostatic adsorption layer on the basis of the nano melt-blown fiber medium layer, and a three-dimensional wave structure as shown in fig. 1 is formed by a foaming process, and in addition, the electrostatic adsorption layer material has electrostatic adsorption effect on small-sized pollution, so that the filter cotton for moisture-proof mask becomes large-sized pollutant, and can effectively block the toxic and harmful substances, so that the filter cotton for moisture-proof mask has higher filtration efficiency, and gives good protection effect to the filter cotton for moisture-proof mask. As can be seen from comprehensive comparison of comparative examples and examples, the filter cotton for the moistureproof mask provided by the invention is designed into a wavy material through a multilayer structure, a nano-jet melt fiber medium layer is used as a substrate, a moisture absorption layer and an electrostatic adsorption layer are added, and the prepared product has good air permeability, good moisture permeability and good protective performance, and can meet the requirements of actual production and consumers.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement it, but not limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (8)

1. The filter cotton for the moisture-proof mask is characterized by comprising the following components from outside to inside: the electrostatic adsorption layer, the filter layer, the moisture absorption layer and the nano-blown fiber medium layer are bonded by polyvinyl acetal glue;
the electrostatic adsorption layer is of a wave-shaped structure;
the electrostatic adsorption layer comprises resin, a photo-curing monomer and an additive, wherein the mass ratio of the resin to the photo-curing monomer is 1:0.5-1; the additive comprises a photoinitiator and hollow foaming microspheres;
the structural formula of the resin is shown as follows:
；
wherein R is methyl or H; x is one or a combination of more of methyl, ethyl, butyl, propyl, isopropyl, octyl, isooctyl, phenyl, benzyl and isobornyl; a is an integer of 1-5, b is an integer of 5-50;
the preparation method of the electrostatic adsorption layer comprises the following steps:
(1) Uniformly mixing the resin and the photo-curing monomer at 30-50 ℃;
(2) Adding a photoinitiator and hollow foaming microspheres, and uniformly mixing to obtain an electrostatic adsorption layer;
the moisture absorption layer is formed by mixing and weaving a water absorption polymer and polypropylene-based carbon fibers;
the water-absorbing polymer is polysulfone hollow fiber wrapped by sodium polyacrylate, and is in a powder shape.
2. The filter cotton for moisture-proof mask according to claim 1, wherein the electrostatic adsorption layer has a coating thickness of 20-30 μm, a peak-to-trough height of 1-10mm, and a peak-to-peak spacing of 1-10mm; the filter layer is woven by polytetrafluoroethylene fibers, and the thickness of the filter layer is 0.5-1mm; the thickness of the moisture absorption layer is 2-4mm; the thickness of the nanometer spray melt fiber medium layer is 0.1-1mm.
3. The filter cotton for moisture-proof mask according to claim 1, wherein the photo-curing monomer in the step (1) is selected from one or more combinations of 1, 6-hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate and pentaerythritol tetraacrylate, and the mass of the photo-curing monomer is 1-5% of the sum of the mass of the resin and the photo-curing monomer; the photoinitiator in the step (2) is selected from a photoinitiator 184 or a photoinitiator 1173, the mass of the photoinitiator is 1-10% of the sum of the mass of the resin and the mass of the photo-curing monomer, the hollow foaming microsphere is selected from any one of F-50, F-82 and F103K, MSH-500 manufactured by Japanese pine oil and fat pharmaceutical Co, and the mass of the hollow foaming microsphere is 0.3-0.6% of the sum of the mass of the resin and the mass of the photo-curing monomer.
4. The filter cotton for moisture-proof mask as claimed in claim 2, wherein the method for preparing the water-absorbent polymer comprises the steps of:
(1) Dissolving sodium polyacrylate solid in deionized water for standby;
(2) Completely immersing polysulfone hollow fiber into an aqueous solution of sodium polyacrylate, standing for 10-15 minutes, and taking out;
(3) Drying the product obtained in the step (2), and crushing the dried product into powder at a low temperature to obtain the water-absorbing polymer;
the pore diameter of the polysulfone hollow fiber is 1-2mm, and the mass ratio of the sodium polyacrylate to the water in the step (1) is 1:1-2; the drying temperature in the step (3) is 90-110 ℃ and the drying time is 3-5h.
5. The filter cotton for moisture resistant mask of claim 1 wherein said nano-blown melt fiber media layer has a minimum DEHS particle filtration efficiency of 25% or more, said nano-blown melt fiber media layer comprising a fiber filtration layer comprising micro glass fibers, a wetting agent and a melt additive and a polymer coating.
6. The filter cotton for moisture mask as claimed in claim 5, wherein the wetting agent is one or more selected from sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium dodecyl phosphate, and sodium dodecyl diphenyl ether disulfonate; the mass of the wetting agent is 0.05-0.1% of that of the micro glass fiber; the melt additive is ethoxylated castor oil; the mass of the melt additive is 1-3% of that of the micro glass fiber; the polymer coating comprises one or more of acrylic ester, carboxylic acid, sulfonate, polyol, amine and silicon-containing compound, and the mass of the polymer coating is 0.01% -5% of that of the nano-jet melt fiber medium layer.
7. A method of producing the filter cotton for moisture-proof mask as claimed in any one of claims 1 to 6, comprising the steps of:
(1) Uniformly mixing polypropylene-based carbon fibers with a water-absorbing polymer, and then braiding to form a moisture-absorbing layer;
(2) Heating to soften the polyvinyl acetal glue, then taking the nano-blown fiber medium layer as a bottom, coating the polyvinyl acetal glue on the nano-blown fiber medium layer, and then covering the moisture absorption layer prepared in the step (1);
(3) Coating the electrostatic adsorption layer on a die, rapidly drying the solvent under an infrared lamp at 100-110 ℃, heating to 130-170 ℃ to enable the microspheres to be fully foamed, and curing and shaping the coating after foaming is finished;
(4) Taking the composite filter cotton obtained in the step (2) as a bottom, softening the polyvinyl acetal glue at 110-120 ℃, and covering the filter layer woven by the electrostatic adsorption layer and the polytetrafluoroethylene fiber to obtain the filter cotton for the moistureproof mask;
the mass ratio of the polypropylene-based carbon fiber to the water-absorbing polymer in the step (1) is as follows: 1000:1-5; the heating temperature in the step (2) is 110-120 ℃.
8. Use of the filter cotton for moisture-proof masks according to any one of claims 1 to 6 in the field of mask preparation.
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