WO2016128844A1 - Nano-masque facial et son procédé de production - Google Patents

Nano-masque facial et son procédé de production Download PDF

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Publication number
WO2016128844A1
WO2016128844A1 PCT/IB2016/050009 IB2016050009W WO2016128844A1 WO 2016128844 A1 WO2016128844 A1 WO 2016128844A1 IB 2016050009 W IB2016050009 W IB 2016050009W WO 2016128844 A1 WO2016128844 A1 WO 2016128844A1
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WO
WIPO (PCT)
Prior art keywords
face mask
layer
nano
mask according
nanofibers
Prior art date
Application number
PCT/IB2016/050009
Other languages
English (en)
Inventor
Reza FARIDI MAJIDI
Nader Naderi
Abolghasem KOOCHAKI JOOBONI
Ali GHEIBI
Original Assignee
Fanavaran Nano- Meghyas Company (Ltd.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanavaran Nano- Meghyas Company (Ltd.) filed Critical Fanavaran Nano- Meghyas Company (Ltd.)
Publication of WO2016128844A1 publication Critical patent/WO2016128844A1/fr

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Classifications

    • 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
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
    • 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
    • B32B5/02—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
    • B32B5/022—Non-woven 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
    • B32B5/02—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
    • B32B5/08—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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • 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
    • 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
    • B32B2262/0261—Polyamide fibres
    • 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
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2262/0292—Polyurethane fibres
    • 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
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/728—Hydrophilic
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic
    • 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
    • B32B2571/00—Protective equipment

Definitions

  • the present application generally relates to face masks, and more particularly to a face mask for removal of environmental pollutants and impurities from breathed air, and method for producing same.
  • Nanofibers are among the most important types of nanostructures. When the diameters of polymer fiber materials are shrunk from micrometers to nanometers, several characteristics appear, such as very large surface area to volume ratio, flexibility in surface functionalities, and superior mechanical performance compared to any other known form of material. Different materials can be used for nanofiber production, among which, polymers and ceramics are the most important ones. Nanofibers can have several applications in medicine (tissue engineering, wound dressing, drug delivery, artificial organ components, medical textile materials, surgical masks, etc.), filtration (water, air), protective clothing, composites and electronics.
  • medicine tissue engineering, wound dressing, drug delivery, artificial organ components, medical textile materials, surgical masks, etc.
  • filtration water, air
  • protective clothing composites and electronics.
  • Electro spinning seems to be an efficient method, which can address the shortcomings of other methods, such as feasibility or controllability. Electro spinning has been a well-known method for nanofiber production for decades. Most polymer solutions including biodegradable and environmental friendly polymer solutions can be used as the spinning solution.
  • the present disclosure describes a nano face mask including a middle layer including a nano layer, wherein the nano layer includes a plurality of nanofibers; and two cover layers including nonwoven layers; where, the nano layer is placed between the two cover layers to form a face mask.
  • the abovementioned general aspect may include one of the following features.
  • the nano layer can be coated onto a nonwoven layer using a method, such as electro spinning or particularly needleless electro spinning.
  • a plurality of nano fibers can be placed between the two cover layers, as the nano layer.
  • the nano layer can be coated onto the nonwoven layer by electro spinning a polymer solution.
  • the polymer solution can include polyolefin, polyamide, polyester, cellulose ether and ester, cellulose acetate, polyvinylidene fluoride, poly aery lonitrile, polyvinyl alcohol, polyethersulfone, nylon, polystyrene, poly aery lonitrile, polycarbonate, chitosan, or mixtures thereof.
  • the two cover layers can include nonwoven layers made of a polymer, such as polypropylene, polyester, polyethylene, polyamide, polyurethane, or mixtures thereof.
  • FIG. 1 illustrates an exemplar and non-limiting schematic representation of layers of a nano face mask, pursuant to the teachings of the present disclosure.
  • FIG. 2 is a scanning electron microscope (SEM) image of a nanofiber mat, produced pursuant to the teachings of the present disclosure.
  • FIG. 3 is a field emission scanning electron microscope (FESEM) image of a plurality of nanofibers coated on a nonwoven layer, pursuant to the teachings of the present invention.
  • FESEM field emission scanning electron microscope
  • FIG. 4 illustrates an exemplar and non-limiting schematic representation of layers of a nano face mask, pursuant to the teachings of the present disclosure.
  • an exemplar nano face mask 100 includes a middle layer 101, having a non- woven layer 102, which is coated by a nano-layer 103 having a plurality of nanofibers; and two cover layers 104, which are located on both sides of the middle layer 101.
  • the middle layer 101 is configured to filter nano-sized or sub-micron particles from the air stream.
  • the plurality of nanofibers in the nano-layer 103, which is coated onto the non-woven layer 102 intercept particles in the nanometer size range or sub-micron size range, as they pass through the middle layer 101.
  • nano-sized or sub-micron particles Due to the small size of the nanofibers, the filtration efficiency is higher for removing nano- sized or sub-micron particles from the air flowing across the middle layer 101, and consequently across the whole nano face mask 100, whereas there is non-significant increase in pressure drop.
  • These nano-sized or sub-micron particles can include, for example, viruses, bacteria, dust, or allergic materials.
  • FIG. 4 illustrates an exemplar schematic illustration of different layers of the nano face mask 100 and how they could be arranged relative to a user's face.
  • the cover layers 104 may be prepared in variety of ways.
  • the cover layers 104 which are non-woven polymeric layers, can be produced by a spunbond process.
  • Different Polymers including polypropylene, polyester, polyethylene, polyamide, polyurethane, etc. can be used in the spunbond process.
  • a polymer is melted by heating and mechanical action when it is conveyed to an extruder.
  • the polymer can be mixed with stabilizers, additives, color master-batch, resin modifiers, or other additives.
  • the polymer mixture is then conveyed through the screw of the extruder, and it is melted through the heated screw; then, the molten polymer or polymer mixture can be conveyed to a filter to remove foreign particles, such as metals, and solid polymer particles.
  • the polymer mixture is conveyed to a metering pump, which ensures a precise volumetric flow rate of the molten polymer; the molten polymer is then conveyed to a die assembly, which consists of a feed distributor and a spinneret; the molten polymer is then emitted through the spinneret holes, and the emitted filaments pass through a quench chamber and the molten filaments are cooled by air and are solidified; after that, the filaments can be led into a tapered conduit by high velocity air, which leads to the stretching of the individual filaments; the filaments are then deposited on a moving belt, on which web formation occurs, and filaments are separated; after that, the filaments are bonded.
  • a metering pump which ensures a precise volumetric flow rate of the molten polymer
  • the molten polymer is then conveyed to a die assembly, which consists of a feed distributor and a spinneret; the molten polymer is then emitted
  • Many bonding methods can be used to bond the filaments in the spunbond process. For example, hydroentangle bonding, needlepunching bonding, thermal bonding, chemical bonding, etc.; after the filaments are bonded, there can be extra treatment processes, such as embossing, resin treatment, dyeing, or printing.
  • polypropylene can be used for producing the cover layers 104 in a spunbond process.
  • Polypropylene is relatively inexpensive and provides the highest yield, and moreover, it has the lowest specific gravity and the highest versatility for nonwovens.
  • Polyester (PET) can be used in the spunbond process due to its tensile strength, modulus, and heat stability.
  • Polyethylene (PE) with acceptable chemical resistance, and suitable electrical insulation properties can also be used in the spunbond process.
  • Polyamide including nylon 6 and nylon 66 has the properties, which are highly energy intensive compared to polyester (PET) or polypropylene (PP). Therefore, polyamide can also be used to produce the non- woven cover layers 104.
  • the plurality of nanofibers in the nano layer 103 may be produced in a variety of ways.
  • nanofibers may be produced by electro spinning a polymer solution.
  • hydrophilic and hydrophobic polymers can be used as the polymer solution in producing the nanofibers.
  • applicable polymers may include polyolefin, polyamide, polyester, cellulose ether and ester, cellulose acetate, polyvinylidene fluoride, polyacrylonitrile, polyvinyl alcohol, polyethersulfone, nylon, polystyrene, polyacrylonitrile, polycarbonate, chitosan, or mixtures thereof.
  • the plurality of the nanofibers in the nano layer 103 are produced using a needleless electro spinning method.
  • a high electric field is used to produce ultra-fine polymeric fibers with diameters ranging from a few nanometers to a few micrometers.
  • the mechanism of the electro spinning process is based on a complex electro-physical activity between a polymer solution and an electrostatic force.
  • a high-voltage electric field is set up between a viscoelastic polymer solution (herein after the "spinning solution") and a collector using a high voltage power supply. When the spinning solution is exposed to the electric field, a semispherical droplet of the spinning solution is formed.
  • the charged polymer droplet With increasing voltage, the charged polymer droplet elongates to form a conical shape and the surface charge on the polymer droplet increases with time.
  • a polymer jet is initiated.
  • the solvent in the polymer jet evaporates during its travel to the collector, increasing the surface charge on the jet.
  • This increase in surface charge induces instability in the polymer jet as it passes through the electric field.
  • the polymer jet divides geometrically, first into two jets, and then into many more as the process repeats itself.
  • the formation of nanofibers and sub-micron fibers results from the action of the spinning force provided by the electrostatic force on the continuously splitting polymer droplets.
  • Nanofibers or sub-micron fibers are deposited layer-by-layer on the collector, forming a non-woven nanofibrous mat.
  • both extrinsic and intrinsic parameters are known to affect the structural morphology of the nanofibers or the sub-micron fibers.
  • extrinsic parameters such as environmental humidity and temperature
  • intrinsic parameters including applied voltage, electro spinning distance, and conductivity and viscosity of the polymer solution, need to be optimized to produce uniform nanofibers or sub-micron fibers.
  • the two major structures usually found in the nanofibrous mat are a uniform, continuous fibrous structure and a bead-containing fibrous structure. Variation in the relative abundance of these two structures is determined by the relative contributions of the parameters during the electrospinning process.
  • the plurality of nanofibers comprise a nano layer 103, which can be separately placed between the cover layers 104, or it can be coated on a non-woven layer 102 by a method, such as, for example electrospinning or more particularly, needleless electrospinning.
  • the electrospun nanofibers with uniform size distribution possess superior mechanical performance and significantly increase the filtration yield.
  • the nano layer 103 can be produced using natural polymers, such as chitosan, optional nanoparticles and herbal extracts can also be added to this layer to enhance self -cleansing and antibacterial properties of the nano face mask 100.
  • the non-woven layer 102 may be obtained in a variety of ways. For example by a melt-blown process.
  • Examples of applicable polymers may include polymers, such as polyolefin (polypropylene, polyethylene, etc.), polyester, nylon 6, nylon 11, polycarbonate, polystyrene, etc.
  • the melt-blown process is a one-step process, in which high-velocity air blows a molten thermoplastic resin from an extruder die tip onto a conveyor or take-up screen to form a fine fibrous and self-bonding web.
  • the melt-blown process is similar to the spunbond process, which converts resins to nonwoven fabrics in a single integrated process.
  • Two cover layers 104 and the middle layer 101 are folded and bound together to form the nano face mask 100, pursuant to the teachings of the present invention.
  • An elastic band can be used as an ear loop, which holds the mask in its optimal position on a human' s face.
  • An electro spinning process is performed under the following process conditions: Nylon 66 is dissolved in formic acid under continuous stirring at room temperature for 6 hours, in order to prepare a spinning solution having a concentration of 12 wt%.
  • the following electro spinning conditions were set: a high voltage of 50 kV was applied to establish the electrical field between the solution and the collector. The temperature was set at 30 °C and the electro spinner drum rotation speed and the collector rotation speed were set at 6 rpm. The electro spinning distance was set at 12 cm.
  • FIG. 2 is a scanning electron microscope (SEM) image of the nanofibers produced pursuant to the teachings of this example.
  • the produced nanofiber mat can be placed between the non- woven cover layers 104 to form the nano face mask 100. Or it can be coated on a non-woven layer using the same electro spinning process, as described hereinabove, to form a middle layer 101, which in turn, is placed between the two cover layers 104 to form a nano face mask 100.
  • FIG. 3 illustrates field emission scanning electron microscope (FESEM) image of the electrospun nylon 66 nanofibers deposited on a layer of melt-blown nonwoven.
  • FESEM field emission scanning electron microscope

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne un nano-masque facial qui comporte une couche médiane, qui est placée entre deux couches de couverture. La couche médiane comprend une nano-couche revêtue sur une couche non-tissée. La nano-couche comprend une pluralité de nanofibres, qui peuvent intercepter des particules de taille nanométrique ou de taille sous-micronique lorsqu'elles passent à travers la couche médiane.
PCT/IB2016/050009 2015-02-14 2016-01-03 Nano-masque facial et son procédé de production WO2016128844A1 (fr)

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Application Number Priority Date Filing Date Title
IR13933012800 2015-02-14
IR139350140003012800 2015-02-14

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CN106283389A (zh) * 2016-10-20 2017-01-04 北京服装学院 一种疏水/亲水浸润性差异复合纤维膜及其制备方法
CN107747165A (zh) * 2017-10-16 2018-03-02 苏州大学 一种超亲水聚酯纳米纤维膜及其制备方法
CN107964736A (zh) * 2016-10-19 2018-04-27 苏州汉力新材料有限公司 聚偏氟乙烯/聚苯乙烯复合超疏水材料的制备方法
WO2018158781A1 (fr) * 2017-03-02 2018-09-07 INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT Madras) Filtre nasal multifonctionnel multicouche
CN109398910A (zh) * 2018-09-27 2019-03-01 广州品赫生物科技有限公司 面膜袋材料、生产工艺及面膜包装袋
CZ308285B6 (cs) * 2018-06-12 2020-04-15 Nanopharma, A. S. Elektrostaticky laminované nanovlákenné kosmetické krytí s odnímatelnou laminační vrstvou, způsob jeho laminace a použití
CN111235756A (zh) * 2020-02-15 2020-06-05 华南农业大学 一种新型防尘、抗菌、抗病毒纳米纤维口罩
CN111227357A (zh) * 2020-03-09 2020-06-05 杨小兵 一种可水洗的抗菌防护口罩
CN111389098A (zh) * 2020-04-27 2020-07-10 蚌埠泰鑫材料技术有限公司 有效负载铜离子的静电纺丝复合纤维材料
CN111648137A (zh) * 2020-05-22 2020-09-11 华北电力大学 一种双层浸润性功能纺织表面的口罩套
CN112226906A (zh) * 2020-09-30 2021-01-15 安徽灵春医用耗材有限公司 一种复合层口罩材料制备方法
DE202020103827U1 (de) 2020-04-22 2021-07-27 Thorey Gera Textilveredelung Gmbh Antivirale und/oder antibakterielle Mund- und Nasenschutzmaske
EP3885476A1 (fr) 2020-03-23 2021-09-29 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Textile multicouche composite transparent à base de nanofibres
WO2021197482A1 (fr) * 2020-04-03 2021-10-07 King's Flair Innovative Marketing Limited Nouveau matériau filtrant, masque pour le visage doté dudit matériau, et procédé de fabrication associé
CN113597369A (zh) * 2019-07-25 2021-11-02 纳米及先进材料研发院有限公司 多层交错膜和其制造方法
WO2021230839A1 (fr) * 2020-05-12 2021-11-18 Telasis Tekstil Urunleri San. Ve Tic.A. S. Procédé de production de couches de filtration haute performance et leur application sur un masque

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CN111648137B (zh) * 2020-05-22 2021-05-11 华北电力大学 一种双层浸润性功能纺织表面的口罩套
CN111648137A (zh) * 2020-05-22 2020-09-11 华北电力大学 一种双层浸润性功能纺织表面的口罩套
CN112226906A (zh) * 2020-09-30 2021-01-15 安徽灵春医用耗材有限公司 一种复合层口罩材料制备方法

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