US20140026897A1 - Face mask and method of its production - Google Patents

Face mask and method of its production Download PDF

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Publication number
US20140026897A1
US20140026897A1 US13/979,414 US201113979414A US2014026897A1 US 20140026897 A1 US20140026897 A1 US 20140026897A1 US 201113979414 A US201113979414 A US 201113979414A US 2014026897 A1 US2014026897 A1 US 2014026897A1
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United States
Prior art keywords
face mask
layer
fabric
face
nanofibres
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Abandoned
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US13/979,414
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English (en)
Inventor
Jan Saroch
Marcela Munzarova
Adela Klabanova
Ivan Ponomarev
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Elmarco sro
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ROYAL NATURAL MEDICINE SRO
Elmarco sro
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Application filed by ROYAL NATURAL MEDICINE SRO, Elmarco sro filed Critical ROYAL NATURAL MEDICINE SRO
Assigned to ROYAL NATURAL MEDICINE, S.R.O. reassignment ROYAL NATURAL MEDICINE, S.R.O. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAROCH, JAN, PONOMAREV, Ivan, KLABANOVA, Adela, MUNZAROVA, Marcela
Assigned to ROYAL NATURAL MEDICINE, S.R.O, ELMARCO S.R.O reassignment ROYAL NATURAL MEDICINE, S.R.O CORRECTIVE ASSIGNMENT TO CORRECT THE SECOND ASSIGNEE (ADD) AND CORRECT APPLICATION NUMBER PREVIOUSLY RECORDED ON REEL 031264 FRAME 0192. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECTIVE ASSIGNMENT. Assignors: SAROCH, JAN, PONOMAREV, Ivan, KLABANOVA, Adela, MUNZAROVA, Marcela
Publication of US20140026897A1 publication Critical patent/US20140026897A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • 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
    • 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
    • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • 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
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly

Definitions

  • the invention relates to a face mask for removal of biological and mechanical impurities from breathed and/or exhaled air, comprising an inner textile layer and an outer textile layer, between which there is arranged a filtering layer of polymer nanofibres and/or an active layer of polymer nanofibres which contains in its structure a biocidal substance/s.
  • the invention also relates to a method for production of such face mask.
  • a number of patent documents disclose several variants of face masks designed for removal of biological and/or mechanical impurities from breathed and/or exhaled air, which contain at least one layer of nanofibres.
  • the face mask disclosed in CN 2640523 belongs to the simplest variants of such face masks, as it comprises one filtration layer of nanofibres arranged between two layers of fabric.
  • the face mask described in CN 2650790 is similar in its structure, here nevertheless the layer of nanofibres is arranged between two layers of non-woven fabric. Both these face masks are able to catch mechanical, possibly also biological impurities, especially micro-organisms (bacteria, viruses, etc.), whose dimensions are greater than dimensions of interfiber spaces in the layer of nanofibres. Micro-organisms as well as mechanical impurities of smaller dimensions penetrate the face mask.
  • CZ UV 16988 discloses a variant of a face mask which is more demanding as to manufacturing and technology.
  • the active layer of nanofibres comprising particles of antimicrobial additive is arranged, which actively acts on micro-organisms caught by layer of nanofibres and partially also on micro-organisms, which are, thanks to their small dimensions, passing through it.
  • Micro-organisms, which have passed through the face mask are killed or at least weakened by action of the antimicrobial additive, so that their undesired effect after aspiration is totally or at least partially eliminated.
  • the face mask described in CZ 297697 achieves the highest efficiency.
  • the mask comprises both, the filtering layer of nanofibres, as well as the active layer of nanofibres with particles of antimicrobial additive arranged between two textile layers.
  • the filtration layer of nanofibres catches biological as well as mechanical impurities, and the active layer of nanofibres kills or at least weakens caught or passing micro-organisms.
  • Combination of two layers of nanofibres simultaneously substantially increases filtration efficiency of the face mask, which thus catches impurities which might pass through the face mask with one layer of nanofibres. Nevertheless this face mask is the most complicated and cost demanding as to its production and technology.
  • the goal of this invention is to propose a face mask which would remedy or at least eliminate shortcomings of the background art and to propose method of its production.
  • a face mask for removal of biological and mechanical impurities from breathed and/or exhaled air which comprises an inner textile layer and an outer textile layer, between which there is arranged a filtration layer & polymer nanofibres and/or active layer of polymer nanofibres, which comprises in its structure biocidal substance/s, and whose principle consists in that, the outer as well as the inner textile layer are formed of microfibres, while at least the outer textile layer and with it neighbouring filtering or active layer of polymer nanofibres are hydrophobic, and all layers of the face mask are mutually interconnected by net of joints, that prevent their mutual motion and reduce permeability of the face mask only minimally.
  • the inner textile layer is on the periphery of the face mask provided with a layer of an adhesive for fastening to face of the user.
  • the face mask achieves high filtration effectiveness, and thanks to hydrophobic properties of at least the outer textile layer and with it neighbouring layer of nanofibres is substantially not permeable for air humidity as well as for humidity from breath of the user, so that it does not become wet and does not create conditions for penetration of micro-organisms, neither for such which are dimensionally smaller than interfibre spaces of the nanofibrous layer.
  • the layer of adhesive on the inner textile layer ensures tight adhesion of the face mask to the face of user around its entire periphery, so that no detachment occurs and all breathed and exhaled air passes through the face mask.
  • the face mask its inner textile layer is formed of a non-woven fabric of spunbond type, which is pleasant upon contact with skin of the user's face, or spunlace, while the outer textile layer is formed of a non-woven fabric of meltblown type, possibly comprises a sub-layer formed of non-woven fabric of meltblown type, and a sub-layer formed of non-woven fabric of spunbond type, while the sub-layer formed of the non-woven fabric of meltblown type neighbours with the filtering or active layer of nanofibres.
  • the sub-layer formed of non-woven fabric of spunbond type improves mechanical properties of the face mask and simultaneously protects the sub-layer formed of the non-woven fabric of meltblown type against wear or other damage.
  • the filtering layer of nanofibres comprises the nanofibres from spinnable hydrophobic polymer, like for example polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc.
  • PVDF polyvinylidene fluoride
  • PUR polyurethane
  • PET polyester
  • PALS polylactic acid
  • PCL polycaprolactone
  • Active layer of nanofibres preferably comprises nanofibres from the same hydrophobic polymers, which in addition comprise in their structure biocidal substance/s, which kills or at least weakens micro-organisms caught in the face mask.
  • silver is suitable biocidal substance.
  • the individual layers of the face mask are interconnected by a net of spot joints, whose density preferably ranges between 2 to 50 spot joints to cm 2 of the face mask surface, or by a net of abscissa joints.
  • the abscissa joints may be mutually joined into a grid.
  • the net of joints is either regular, or irregular, and is performed in entire surface of the face mask or in its selected section only.
  • the face mask in principle has a shape of rectangle, while its upper edge is shaped into a protrusion extending upwards to cover the nose and to fit to its root, and the lower edge has a recess aiming in the direction upwards to fit to the chin and neck of the user.
  • the goal of the invention is achieved by a process of manufacturing of such face mask.
  • the face masks are cut out from the fabric at least in two longitudinal rows arranged side by side along the fabric, in which between the outer textile layer of the face mask and the inner textile layer of the face mask the filtering layer of polymer nanofibres and/or active layer of polymer nanofibres, which comprise the biocidal substance/s, is situated, and which is uniform both in direction of width and length of the fabric.
  • the layers of this fabric are mutually interconnected by means of the net of joints preventing mutual shifting of these layers.
  • the fabric is arranged by its inner layer upwards.
  • the layers of the fabric are interconnected by a net of spot or abscissa joints, possibly by a net of mutually joined abscissa joints.
  • the face mask 1 for removal of biological and mechanical impurities from breathed and/or exhaled air is in the example of embodiment according to the FIG. 1 substantially of rectangular shape, while the longer sides 2 and 20 of the rectangle pass upon application of the face mask 1 to the face of the user over the nose and under the chin, while the shorter sides 3 and 30 pass from the cheek in front of ears to the neck of the user.
  • the middle section which passes over the mouth and nose the face mask 1 is provided with folds 4 , in the represented example of embodiment are these folds horizontal. These folds 4 are on lateral sides of the face mask 1 fixed by any of known methods, e.g.
  • the upper of longer sides 2 and 20 of the rectangle is in its middle section shaped in upward direction, in the represented example of embodiment into a shape of upwards extending protrusion 21 for covering the nose.
  • the lower of longer sides 2 and 20 of the rectangle is in its middle section shaped in upward direction aiming recess 201 , in represented embodiment in the shape of an arch. This shaping enables better adhesion of the face mask 1 to the face of the user.
  • the face mask 1 On its periphery the face mask 1 is on the side designated for contact with face of the user provided with not represented layer of known adhesive material with good dermal compatibility.
  • the layer of the adhesive material Before usage of the face mask 1 , the layer of the adhesive material is covered with an antiadhesive material, in the represented embodiment with covering stripes 5 , 50 and 6 , 60 of silicon paper.
  • these stripes 5 , 50 and 6 , 60 For easier removal are these stripes 5 , 50 and 6 , 60 longer than the respective sides 2 , 20 and 3 , 30 of the face mask 1 and extend beyond its edges. Through this they enable easier gripping and removal before application of the face mask 1 .
  • the covering stripes 5 , 50 and 6 , 60 of silicon paper are removed from the face mask 1 .
  • the edges of the face mask 1 are stuck on face of the user, the space around the nose and mouth of the user is enclosed, and therefore all breathed as well as exhaled air passes through the face mask 1 .
  • the face mask 1 namely the fabric from which is this face mask 1 produced, comprises an inner textile layer and an outer textile layer, between which a filtering and/or an active layer of polymer nanofibres is arranged.
  • the inner textile layer being in contact with user's face is made of a non-woven fabric, preferably of spunbond type of microfibres from hydrophobic material, like e.g. polypropylene (PP) or polyester (PES), or from a non-woven fabric of spunlace type from viscose (VS), cellulose or polymer microfibres.
  • PP polypropylene
  • PET polyester
  • VS viscose
  • the outer textile layer is made of a non-woven textile of microfibres from hydrophobic material, preferably from a non-woven fabric of meltblown type from polypropylene (PP), viscose (VS), polyester (PES) or other microfibres.
  • the outer textile layer is formed of combination of a sub-layer formed of a non-woven fabric of spunbond type and a sub-layer formed of a non-woven fabric of meltblown type, when the sub-layer formed of the non-woven fabric of spunbond type improves mechanical properties of the outer layer of the face mask 1 and protects from outside the sub-layer formed of the non-woven fabric of meltblown type against mechanical wear and damage.
  • Filtering layer of nanofibres is formed of nanofibres from hydrophobic polymer, like e.g. polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc.
  • the active layer of nanofibres is formed of nanofibres from the same hydrophobic polymer, in whose structure there is arranged suitable substance/s with biocidal action, which kills or at least weakens micro-organisms (bacteria, viruses, mould fungus, yeast, etc.) caught in the face mask 1 or passing through the face mask.
  • Hydrophobic properties of the outer textile layer and the layer of polymer nanofibres, and in case of need also of the inner textile layer at the same time ensure that the face mask 1 is substantially not permeable for air humidity as well as for humidity of the user's breath, and therefore it does not become wet and does not create suitable conditions for penetration and reproduction of caught micro-organisms.
  • the filtering and/or active layer of polymer nanofibres catches thanks to its submicron porosity and high specific surface majority of physical and biological impurities contained in the breathed air, especially the dust particles etc., which passed the outer textile layer of the face mask 1 .
  • hydrophobic inner textile layer In case of utilisation of hydrophobic inner textile layer is its disadvantage that humidity from breath of the user deposits on the inner surface of the face mask 1 , which is in contact with user's face. For greater comfort of the user it is therefore advantageous to create this layer from a hydrophile material, which is able to absorb the humidity from breath of the user, so that there is no condensation on its surface. This variant contributes to better physiological comfort of the user.
  • face masks 1 For industrial production, of face masks 1 according to the invention it is necessary to ensure for each produced face mask 1 the same properties, especially filtration properties, which are largely secured by the filtering and/or active layer of polymer nanofibres arranged inside the fabric. Therefore this layer of polymer nanofibres must be even both in direction of width, and in direction of length of the fabric. Due to the fact that the width smaller dimension, the evenness in direction of length of the fabric is the most important. This can be achieved only through a long-term and repeatedly stable spinning process, which is at present represented by a needleless electrostatic spinning of polymer matrix in electric field induced between a spinning electrode and a collecting electrode, e.g.
  • the layer of polymer nanofibres is deposited on a carrying substrate layer, which is made of a non-woven fabric of meltblown type or by combination of non-woven fabrics of spunbond and meltblown type.
  • This substrate layer has basis weight usually in interval 30 to 80 g/m 2 , with diameter of fibres from 1 to 5 micrometers.
  • a binder securing better interconnecting of the layer of polymer nanofibres with the substrate layer may be applied on the substrate layer.
  • the substrate layer represents the outer layer of the face mask 1 .
  • a covering layer of microfibres from hydrophobic material, preferably of spunbond type is deposited, which in the produced face mask 1 forms the inner layer designated for contact with the user's face.
  • This covering layer usually has basis weight in interval 12 to 50 g/m 2 , with diameter of fibres from 1 to 5 micrometers.
  • All three layers of fabric for production of the face mask 1 according to the invention are in one example of embodiment mutually interconnected by not represented dense net of spot joints formed by a binder and/or by fusion binder to secure constant mutual position of all layers during manipulation with the fabric during production of the face mask 1 as well as during handling the face mask 1 at its storage or usage.
  • a dense net of spot joints is understood as a net with 2 to 50 bindings points/cm 2 of surface of the fabric serving for production of the face mask 1 .
  • Specific weight of the used binder usually varies in the range 2 to 20 g/m 2 .
  • the advantage of the spot interconnecting of the layers is, that it substantially does not influence total permeability of the face mask 1 , this not even if it is used on its entire surface, and simultaneously, on the contrary to date common sewing or needling of layers of the face mask 1 , it does not create in the face mask holes enabling passage of biological and/or mechanical impurities, neither does it bring into it any material, which may contribute to such passage by so called wicking effect.
  • To interconnect the layers, of the face mask 1 by means of a binder and/or fusion binder it is possible to use e.g.
  • the procedure disclosed in CZ PV 2010-373 when the said binder or fusion binder is applied on some of the layers of the face mask 1 , possibly on several layers of the face mask 1 , and at subsequent lamination it interconnects all its layers.
  • the net of spot joints may be a regular one, or an irregular one, and may be densified in places of increased mechanical stress of the face mask 1 .
  • the binder and/or fusion binder is applied during production on some of layers of the face mask 1 , possibly on several layers of the face mask 1 in form of fibres or in advance prepared web, so that the performed joints have shapes of abscissae, possibly they merge into shape of a network, nevertheless they have the same or similar advantages as the spot joints.
  • the layers of the face mask 1 are interconnected in another manner, which secures their suitable binding, for example by means of ultrasound welding, possibly combination of this procedure with some of the above mentioned ones.
  • Interconnecting of the layers of the face mask 1 is, according to the need and designation of the face mask 1 , performed either in its entire surface or only in its part, for example in the area of folds 4 .
  • the face mask 1 according to the invention is on the free surface of the inner layer provided with a layer of adhesive, mostly in shape of a stripe guided along an entire periphery of the face mask 1 for fixation to the user's face. If compared with to date common cases, when the face mask 1 is fixed to the user's face with stripes of fabric or other similar manner, the face mask according to the invention enables absolute adhesion of the face mask 1 to the face, thanks to which is the total efficiency of the face mask 1 and its utility value substantially increased, as the air is not breathed either exhaled through the gaps being created between the face mask 1 and the curved or moving parts of the user's face, or through its detachment.
  • the face mask 1 according to the invention is provided with further layers deposited on its inner and/or outer textile layer, which increase its filtration efficiency towards biological and/or mechanical impurities, possibly they actively act against caught micro-organisms, or make the contact of the face mask 1 with face of the user more pleasant, increase its service life, wear resistance, consistency, etc.
  • one of further layers may be represented by further filtration and/or active layer of polymer nanofibres.
  • the face mask 1 may be further provided with known stiffening elements, which further increase tightness of its attachment and/or prevent its detachment from the user's face through its shaping.
  • Industrial production of the face masks 1 according to the invention is after then performed so that at first all layers of the fabric serving for production of the face mask 1 are positioned one on the other, then in some of the above mentioned manner they are interconnected by a net of spot and/or abscissa joints, which prevent their undesired shifting at further operations.
  • the carrying substrate layer for depositing of further layers preferably serves the outer textile layer of the future face mask 1 , on which gradually the filtering and/or active layer of nanofibres and the covering layer, which represents the inner textile layer of the future face mask, are deposited.
  • the filtering layer of nanofibres and/or active layer of nanofibres is preferably deposited on the carrying substrate layer directly through electrostatic spinning.
  • the fabric is arranged by its inner textile layer of future face mask upwards. Subsequently, along the entire length of such prepared fabric using known device the continuous folds of required size and density are created, which are fixed along width of the fabric in places of shorter lateral sides 3 , 30 of individual future face masks 1 in a suitable manner, which does not create holes in the fabric, which would after then deteriorate filtration properties of the face mask 1 , e.g. by ultrasound welding. After then, on upper layer of the fabric on edge sections of future face masks 1 a layer of suitable adhesive with good dermal compatibility is applied, said layer is overlapped by an antiadhesive material, e.g. by stripes 5 , 50 and 6 , 60 of silicon paper. Subsequently, from the fabric a row of side by side arranged face masks 1 of required shape are cut out.
  • an antiadhesive material e.g. by stripes 5 , 50 and 6 , 60 of silicon paper.
  • the layer of adhesive material and/or antiadhesive material may be applied only after the shape of the face mask 1 is cut out from the fabric.
  • the inner textile layer of the face mask 1 is made of a non-woven fabric of spunbond type preferably from polypropylene (PP), polyester (PES) or other microfibres, whose basis weight varies according to the need and designation of the face mask 1 in interval 12 to 50 g/m 2 .
  • a filtering layer of nanofibres from hydrophobic polymer e.g. polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc., prepared through a needleless electrostatic spinning, whose basis weight varies according to the need and designation of the face mask 1 in interval from 0.03 to 1 g/m 2 is deposited.
  • Diameter of nanofibres achieves 150 to 600 nanometers.
  • an outer textile layer of the face mask 1 made from a non-woven fabric of meltblown type, preferably from polypropylene (PP), viscose (VS), polyester (PES), possibly also other microfibres, whose basis weight varies according to the need and designation of the face mask 1 in interval from 30 to 80 g/m 2 . All layers of the face mask 1 are interconnected by a network of spot joints.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner textile layer of the face mask 1 and on it deposited filtering layer of nanofibres are created in the same manner as in example 1.
  • an outer textile layer formed of combination of a sub-layer made from non-woven fabric of meltblown type, preferably from polypropylene (PP), polyester (PES), possibly other microfibres, and a sub-layer made from non-woven textile of spunbond type preferably from polypropylene (PP), possibly other microfibres while its resulting basis weight varies according to the need and designation of the face mask 1 in interval from 30 to 80 g/m 2 .
  • the sub-layer made from non-woven fabric of spunbond type improves at the same time mechanical properties of the face mask 1 and protects the sub-layer made from non-woven fabric of meltblown type against mechanical wear or other damage.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the outer textile layer of the face mask 1 and the filtering layer of nanofibres are created in the same manner as in example 1. Both these layers are deposited on the inner textile layer of the face mask 1 , which is made of a non-woven fabric of spunlace type preferably from viscose (VS), cellulose or polymer microfibres, whose basis weight varies according to the need and designation of the face mask 1 in the interval from 30 to 80 g/m 2 .
  • VS viscose
  • cellulose or polymer microfibres whose basis weight varies according to the need and designation of the face mask 1 in the interval from 30 to 80 g/m 2 .
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner and outer textile layers of the face mask 1 are made of non-woven fabrics in the same, manner as in example 1. Between them there is deposited an active layer of nanofibres prepared through needleless electrostatic spinning, which comprises nanofibres of hydrophobic polymer for example polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc., containing in their structure biocidal substance/s, e.g. nanoparticles of silver, or other suitable substances with biocidal action.
  • Basis weight of the active layer of nanofibres varies according to the need and designation of the face mask 1 in interval from 0.03 to 1 g/m 2 . Diameter of nanofibres achieves 150 to 600 nanometers.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner and outer textile layers of the fate mask 1 are made of non-woven fabrics in the same manner as in example 2. Between them there is deposited the active layer of nanofibres according to the example 4.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner and outer textile layers of the face mask 1 are made of non-woven fabrics in the same manner as in example 3. Between them there is deposited the active layer of nanofibres according to the example 4.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner textile layer, of the face mask 1 is made of a non-woven fabric in the same manner as in example 1.
  • the active layer of nanofibres of hydrophobic polymer, for example polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc., containing in their structure biocidal substance/s, for example nanoparticles of silver, or other suitable substances with biocidal action, whose basis weight varies in interval from 0.03 to 1 g/m 2 .
  • PVDF polyvinylidene fluoride
  • PUR polyurethane
  • PET polyester
  • PDA polylactic acid
  • PCL polycaprolactone
  • the filtering layer of nanofibres of hydrophobic polymer whose basis weight varies in interval from 0.03 to 1 g/m 2 . Both layers of nanofibres are produced through needleless electrostatic spinning.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner textile layer of the face mask 1 is made of non-woven fabric in the same manner as in example 2.
  • the active layer of nanofibres of hydrophobic polymer containing in their structure biocidal substance/s as in example 7, and on it there is deposited the filtering layer of nanofibres from hydrophobic polymer. Both layers of nanofibers are produced through needleless electrostatic spinning.
  • the outer textile layer of the face mask 1 formed from non-woven fabric as in example 2.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
  • the inner textile layer of the face mask 1 is made of non-woven fabric in the same manner as in example 3.
  • the active layer of nanofibres from hydrophobic polymer, containing in their structure biocidal substance/s as in example 7, and the filtering layer of nanofibres of hydrophobic polymer. Both layers of nanofibres are produced through needleless electrostatic spinning.
  • the outer textile layer of the face mask 1 formed from non-woven fabric as in example 2.
  • All layers of the face mask 1 are interconnected in the same manner as in example 1.
  • the inner textile layer of the face mask 1 is on edges on its outer surface provided with a layer of an adhesive material of good dermal compatibility.
US13/979,414 2011-01-17 2011-02-23 Face mask and method of its production Abandoned US20140026897A1 (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016101848A1 (en) * 2014-12-23 2016-06-30 Profit Royal Pharmaceutical Limited Protective masks with coating comprising different electrospun fibers interweaved with each other, formulations forming the same, and method of producing thereof
WO2016128844A1 (en) * 2015-02-14 2016-08-18 Fanavaran Nano- Meghyas Company (Ltd.) Nano face mask and method for producing the same
US9999546B2 (en) 2014-06-16 2018-06-19 Illinois Tool Works Inc. Protective headwear with airflow
US20180208343A1 (en) * 2015-10-16 2018-07-26 Avent, Inc. Method and System for Wrapping and Preparing Facemasks for Packaging in a Manufacturing Line
US20180250537A1 (en) * 2017-03-03 2018-09-06 Waterford Mask Systems Inc. Facemask with Pleated Filter and Continuous Strap
WO2021000974A1 (en) * 2019-07-01 2021-01-07 Tomas Bata University In Zlin Air filtration filter material
US20210022418A1 (en) * 2018-04-13 2021-01-28 Unicharm Corporation Disposable mask
CN113349480A (zh) * 2020-03-04 2021-09-07 浙江珍珠生活科技有限公司 一种珍珠抗菌无纺布医用防护口罩及其制备方法
IT202000006421A1 (it) * 2020-03-26 2021-09-26 Invent S R L Mascherina perfezionata
EP3885476A1 (en) * 2020-03-23 2021-09-29 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Transparent composite nano-fibre based multi-layer textile
US20210299488A1 (en) * 2020-03-29 2021-09-30 Op-D-Op, Inc. Dual mode protective face mask
IT202000014113A1 (it) * 2020-06-12 2021-12-12 Sitip Spa Mascherina filtrante
DE102020117359A1 (de) 2020-07-01 2022-01-05 Medical Ware GbR (vertretungsberechtigte Gesellschafter: Anna-Maria Dittmann, 35708 Haiger, Michael Bedenbender, 35708 Haiger) Textiler Stoff zur Verwendung als Partikelfilter bei Atemmasken, Atemmaske aufweisend den textilen Stoff sowie Verfahren zur Herstellung des textilen Stoffs
WO2022063974A1 (en) * 2020-09-24 2022-03-31 Livinguard Ag Face mask with high breathability
EP4018863A1 (en) * 2020-05-11 2022-06-29 Bisaf Spolka Z Ograniczona Odpowiedzialnoscia Protective filtering half mask
CN114821717A (zh) * 2022-04-20 2022-07-29 北京百度网讯科技有限公司 目标对象融合方法、装置、电子设备及存储介质
US11484734B2 (en) 2013-09-04 2022-11-01 Octo Safety Devices, Llc Facemask with filter insert for protection against airborne pathogens
US11554276B2 (en) 2018-04-11 2023-01-17 Octo Safety Devices, Llc Facemask with facial seal and seal test device
USD989286S1 (en) * 2021-02-16 2023-06-13 Gregory Allen Face mask
CN116672904A (zh) * 2023-07-06 2023-09-01 中国矿业大学 基于摩擦电效应的高孔隙率聚乳酸高效空气过滤膜及其制备方法
US11812816B2 (en) 2017-05-11 2023-11-14 Illinois Tool Works Inc. Protective headwear with airflow

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012030798A1 (en) 2010-08-31 2012-03-08 Crosstex International, Inc. A filter mask having one or more malleable stiffening members
JP5972092B2 (ja) * 2012-08-06 2016-08-17 サンエムパッケージ 株式会社 マスク
US9421707B2 (en) * 2012-10-05 2016-08-23 Honeywell International Inc. Nanofiber filtering material for disposable/reusable respirators
US9446547B2 (en) 2012-10-05 2016-09-20 Honeywell International Inc. Nanofiber filtering material for disposable/reusable respirators
AU2013381874B2 (en) * 2013-03-15 2018-03-01 Crosstex International, Inc. A facemask having one or more nanofiber layers
CN104083946B (zh) * 2014-06-27 2016-06-29 上海洁晟环保科技有限公司 抗菌口罩滤片及其制备方法和抗菌口罩
JP2016017257A (ja) * 2014-07-04 2016-02-01 光弘 高橋 抗菌機能を備えたナノファイバー部材およびそれを使用したナノファイバー抗菌機能製品
PL410670A1 (pl) * 2014-12-19 2016-06-20 Secura B. C. Spółka Z Ograniczoną Odpowiedzialnością Sposób ciągłego formowania ochronnych masek filtracyjnych
CZ307884B6 (cs) * 2015-03-09 2019-07-24 Technická univerzita v Liberci Způsob pro výrobu textilního kompozitu zejména pro outdoorové aplikace, který obsahuje alespoň jednu vrstvu polymerních nanovláken, a tímto způsobem připravený textilní kompozit
CN105688349B (zh) * 2016-04-18 2019-04-19 广州拜费尔空气净化材料有限公司 防病毒口罩
CN106334281A (zh) * 2016-08-23 2017-01-18 孟玲 一种应用于煤矿的安全面罩
EP3804550A1 (en) * 2016-08-26 2021-04-14 Livinguard AG Wash-durable face mask with antimicrobial properties and/or improved washability
CN107788595A (zh) * 2016-08-30 2018-03-13 孙利 一种防雾霾的纳米口罩
JP7050558B2 (ja) * 2018-04-13 2022-04-08 ユニ・チャーム株式会社 使い捨てマスク
IT202000010192A1 (it) * 2020-05-08 2021-11-08 Egidio Armando Mascherina protettiva con visiera accessoria, auto-reggente, auto-collassabile e non riutilizzabile dopo l'asportazione, usa e getta, biocompatibile, biodegradabile, compostabile, a protezione aumentata, economica, per l'utilizzo mirato da parte degli utenti di saloni di acconciatura, di bellezza, di estetica e simili, ed in genere durante le attivita' di durata breve e controllata, di cura della persona.
EP3915650A1 (de) * 2020-05-28 2021-12-01 Eurofilters Holding N.V. Atemschutzmaske
IT202000025297A1 (it) * 2020-10-26 2022-04-26 Gmm Labs Srl Mascherina filtrante
CA3195532A1 (en) * 2021-10-06 2023-04-06 PADM Medical Inc. Disposable, compostable surgical/medical masks and methods of production therefor
WO2023063075A1 (ja) * 2021-10-15 2023-04-20 王子ホールディングス株式会社 不織布の製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855046A (en) * 1970-02-27 1974-12-17 Kimberly Clark Co Pattern bonded continuous filament web
US6644314B1 (en) * 2000-11-17 2003-11-11 Kimberly-Clark Worldwide, Inc. Extensible and retractable face mask
WO2007054040A2 (en) * 2005-11-10 2007-05-18 Elmarco, S.R.O. Filter for removing of physical and/or biological impurities
US20080105262A1 (en) * 2006-11-03 2008-05-08 Victoria Stan Harold Air filtering soft face mask
US20090075019A1 (en) * 2004-10-07 2009-03-19 Eska Lederhandschunhfabrik Internal Lining and Method for the Production Thereof

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4442499A (en) * 1998-06-17 2000-01-05 Firedrill Company, Inc., The Fire escape mask
US6427693B1 (en) * 2000-05-01 2002-08-06 Kimberly-Clark Worldwide, Inc. Face mask structure
US7152601B2 (en) * 2000-12-18 2006-12-26 Mohamed Ali Barakat Strapless respiratory face mask
US6923182B2 (en) * 2002-07-18 2005-08-02 3M Innovative Properties Company Crush resistant filtering face mask
WO2005034659A2 (en) * 2003-08-11 2005-04-21 University Of Tennessee Research Foundation Fluorochemical electret treatment for barrier fabrics
CZ294274B6 (cs) 2003-09-08 2004-11-10 Technická univerzita v Liberci Způsob výroby nanovláken z polymerního roztoku elektrostatickým zvlákňováním a zařízení k provádění způsobu
CN2640523Y (zh) 2003-09-08 2004-09-15 吉林省惟升科贸发展有限公司 平板折叠形纳米防护口罩
CN2650790Y (zh) 2003-09-08 2004-10-27 吉林省惟升科贸发展有限公司 防飞沫抗菌口罩
CZ300797B6 (cs) 2005-04-11 2009-08-12 Elmarco, S. R. O. Textilie obsahující alespon jednu vrstvu polymerních nanovláken a zpusob výroby vrstvy polymerních nanovláken z roztoku polymeru elektrostatickým zvláknováním
CZ299549B6 (cs) 2006-09-04 2008-08-27 Elmarco, S. R. O. Rotacní zvláknovací elektroda
US7615092B2 (en) * 2006-10-16 2009-11-10 Dougherty William J Filtering mask
US20090277451A1 (en) * 2006-11-13 2009-11-12 Stanley Weinberg Strapless cantilevered respiratory mask sealable to a user's face and method
US20080110469A1 (en) * 2006-11-13 2008-05-15 Stanley Weinberg Strapless flexible tribo-charged respiratory facial mask and method
CZ300345B6 (cs) 2007-07-17 2009-04-22 Elmarco, S. R. O. Zpusob zvláknování kapalné matrice, zarízení pro výrobu nanovláken elektrostatickým zvláknováním kapalné matrice a zvláknovací elektroda pro takové zarízení
KR20100003826A (ko) * 2008-07-02 2010-01-12 코오롱패션머티리얼 (주) 방진마스크
US8523971B2 (en) * 2009-05-07 2013-09-03 The Hong Kong Polytechnic University Multilayer nanofiber filter
MX347440B (es) * 2009-05-29 2017-04-26 Filligent Ltd Composicion para el uso en la disminucion de la transmision de patogenos humanos.
CN201657804U (zh) * 2009-12-22 2010-12-01 张太宪 气阻小过滤性能强的口罩

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855046A (en) * 1970-02-27 1974-12-17 Kimberly Clark Co Pattern bonded continuous filament web
US6644314B1 (en) * 2000-11-17 2003-11-11 Kimberly-Clark Worldwide, Inc. Extensible and retractable face mask
US20090075019A1 (en) * 2004-10-07 2009-03-19 Eska Lederhandschunhfabrik Internal Lining and Method for the Production Thereof
WO2007054040A2 (en) * 2005-11-10 2007-05-18 Elmarco, S.R.O. Filter for removing of physical and/or biological impurities
US20080105262A1 (en) * 2006-11-03 2008-05-08 Victoria Stan Harold Air filtering soft face mask

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11484734B2 (en) 2013-09-04 2022-11-01 Octo Safety Devices, Llc Facemask with filter insert for protection against airborne pathogens
US11833372B2 (en) 2013-09-04 2023-12-05 Octo Safety Devices, Llc Facemask with filter insert for protection against airborne pathogens
US9999546B2 (en) 2014-06-16 2018-06-19 Illinois Tool Works Inc. Protective headwear with airflow
US11166852B2 (en) 2014-06-16 2021-11-09 Illinois Tool Works Inc. Protective headwear with airflow
WO2016101848A1 (en) * 2014-12-23 2016-06-30 Profit Royal Pharmaceutical Limited Protective masks with coating comprising different electrospun fibers interweaved with each other, formulations forming the same, and method of producing thereof
CN106102863A (zh) * 2014-12-23 2016-11-09 盈宗制药有限公司 带有由不同电纺纤维相互交织而成的涂层的防护口罩、构成所述涂层的配方、以及制作所述防护口罩的方法
US10201198B2 (en) 2014-12-23 2019-02-12 Profit Royal Pharmaceutical Limited Protective masks with coating comprising different electrospun fibers interweaved with each other, formulations forming the same, and method of producing thereof
WO2016128844A1 (en) * 2015-02-14 2016-08-18 Fanavaran Nano- Meghyas Company (Ltd.) Nano face mask and method for producing the same
US20180208343A1 (en) * 2015-10-16 2018-07-26 Avent, Inc. Method and System for Wrapping and Preparing Facemasks for Packaging in a Manufacturing Line
US20180250537A1 (en) * 2017-03-03 2018-09-06 Waterford Mask Systems Inc. Facemask with Pleated Filter and Continuous Strap
US11812816B2 (en) 2017-05-11 2023-11-14 Illinois Tool Works Inc. Protective headwear with airflow
US11554276B2 (en) 2018-04-11 2023-01-17 Octo Safety Devices, Llc Facemask with facial seal and seal test device
US20210022418A1 (en) * 2018-04-13 2021-01-28 Unicharm Corporation Disposable mask
WO2021000974A1 (en) * 2019-07-01 2021-01-07 Tomas Bata University In Zlin Air filtration filter material
CN113349480A (zh) * 2020-03-04 2021-09-07 浙江珍珠生活科技有限公司 一种珍珠抗菌无纺布医用防护口罩及其制备方法
EP3885476A1 (en) * 2020-03-23 2021-09-29 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Transparent composite nano-fibre based multi-layer textile
WO2021191037A1 (en) * 2020-03-23 2021-09-30 Empa Eidgenössische Materialprüfungs- Und Forschungsanstalt Transparent composite nano-fibre based multi-layer textile
IT202000006421A1 (it) * 2020-03-26 2021-09-26 Invent S R L Mascherina perfezionata
US20210299488A1 (en) * 2020-03-29 2021-09-30 Op-D-Op, Inc. Dual mode protective face mask
EP4018863A1 (en) * 2020-05-11 2022-06-29 Bisaf Spolka Z Ograniczona Odpowiedzialnoscia Protective filtering half mask
IT202000014113A1 (it) * 2020-06-12 2021-12-12 Sitip Spa Mascherina filtrante
DE102020117359A1 (de) 2020-07-01 2022-01-05 Medical Ware GbR (vertretungsberechtigte Gesellschafter: Anna-Maria Dittmann, 35708 Haiger, Michael Bedenbender, 35708 Haiger) Textiler Stoff zur Verwendung als Partikelfilter bei Atemmasken, Atemmaske aufweisend den textilen Stoff sowie Verfahren zur Herstellung des textilen Stoffs
WO2022063974A1 (en) * 2020-09-24 2022-03-31 Livinguard Ag Face mask with high breathability
USD989286S1 (en) * 2021-02-16 2023-06-13 Gregory Allen Face mask
CN114821717A (zh) * 2022-04-20 2022-07-29 北京百度网讯科技有限公司 目标对象融合方法、装置、电子设备及存储介质
CN116672904A (zh) * 2023-07-06 2023-09-01 中国矿业大学 基于摩擦电效应的高孔隙率聚乳酸高效空气过滤膜及其制备方法

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CA2824773A1 (en) 2012-07-26
EP2665526A1 (en) 2013-11-27
KR20140088045A (ko) 2014-07-09
CZ201122A3 (cs) 2012-07-18
JP2014502551A (ja) 2014-02-03
AU2011356346A1 (en) 2013-08-15
MX2013008245A (es) 2014-03-12
CZ303299B6 (cs) 2012-07-18
CN103442771A (zh) 2013-12-11
BR112013018158A2 (pt) 2019-09-24

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