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    • 专利摘要:
    Mouth mask comprising: a mask body; and a fastener adapted to be placed over both ears, or the head, of a wearer to secure the mask body to a portion of a face of said wearer such that it covers at least the nose and mouth of said wearer when said mask is worn; wherein said mask body comprises: an outer layer; and a filter layer, the filter layer being positioned on a body-facing surface of said outer layer such that when worn, said filter layer is closer to said nose and mouth as compared to said outer layer, said filter layer being a non-woven fabric laminate comprising at least one meltblown layer and at least one spunbond layer, and wherein said mask body comprises at least two meltblown nonwoven layers.
    公开号:BE1028167B1
    申请号:E20215367
    申请日:2021-05-06
    公开日:2021-10-20
    发明作者:Sande Nathalie Van；Dries Cobbaert
    申请人:Ontex Group；Ontex；
    IPC主号:
    专利说明:

    MOUTH MASK
    TECHNICAL DOMAIN The disclosure relates to face masks and in particular relates to masks with excellent bacterial filtering efficiency (BFE) and low breathing resistance.
    BACKGROUND Masks are typically designed to cover the nose and/or mouth to prevent the entry of bacteria, viruses, and the like, and to prevent the penetration of blood. In general, such masks usually have a 3-layer configuration comprising an outer layer, a filter layer and an inner layer. The main purpose of the outer layer is to protect the filter layer, but for example, it can be colored to make it fashionable, and usually a spunbond non-woven material such as polypropylene is used for the outer layer. The filter layer is generally considered to be the main material that forms part of the mask and serves to filter out bacteria, viruses, pollen and the like. Accordingly, the filter layer is usually designed by using fine diameter fibers such that foreign bodies cannot pass through it easily, while air passes through it easily. The inner layer is positioned on the side of the wearer's mouth and is a portion that makes direct contact with the wearer's skin. The inner layer is therefore designed in such a way that it does not cause skin irritation on contact. Typically, materials such as thermally bonded nonwoven fabric, mixed material paper made from a blend of pulp and polyester fibers, and rayon paper are used for the inner layer. An exemplary mask is disclosed in US4,802,473, which discloses a face mask comprising a layer of meltblown polypropylene material having pleats formed therein; Lycra elastane ear loops are attached to the corners of the layer. Applying heat along the seams attaches the ear loops to them and secures the ends of the pleats. In this way internal fibers of the layer (12) are prevented from entering the surrounding environment.
    Further attempts have been made to improve the effectiveness of masks by limiting the escape of air from the upper nose/eye region of the mask and the sides (when worn by a person), as illustrated in WO01/82727 A2. What is described is an improved multi-layer face mask having at least one adhesive strip disposed between the inner cover layer and the intermediate filter layer. The adhesive strip is defined to extend across the filter body and is defined on each longitudinal side by longitudinally extending zones free of adhesive. The adhesive strip can be applied along a pleat formed in the mouth mask body. For example, the adhesive strip may have a width such that it extends between parallel fold lines of a pleat. With the global pandemic of the covid-19 virus, which has exponentially increased the need to introduce surgical masks to multiple individuals in the world's population to control the contagious effects of the virus, a need has arisen to provide effective masks that not only provide excellent bacterial filtration efficiency (BFE) and low breathing resistance, but are also cheaper and affordable for large-scale worldwide use, preferably limiting the environmental impact of their disposal.
    SUMMARY In a first aspect, the disclosure relates to a mouth mask comprising: a mask body; and a fastener adapted to be placed over both ears, or the head, of a wearer to secure the mask body to a portion of a face of said wearer such that it covers at least the nose and mouth of said wearer when said mask is worn; wherein said mask body comprises: an outer layer; and a filter layer, the filter layer being positioned on a body-facing surface of said outer layer such that when worn, said filter layer is closer to said nose and mouth as compared to said outer layer, said filter layer being a non-woven fabric laminate comprising at least one meltblown layer and at least one spunbond layer, and wherein said mask body comprises at least two meltblown nonwoven layers. In a further aspect, the disclosure relates to a mouth mask comprising: a mask body; and a fastener adapted to be placed over both ears, or the head, of a wearer to secure the mask body to a portion of a face of said wearer such that it covers at least the nose and mouth of said wearer when said mask is worn; wherein said mask body comprises: an outer layer; and a filter layer, wherein the filter layer is positioned on a body-facing surface of said outer layer such that when worn, said filter layer is closer to said nose and mouth as compared to said outer layer, and wherein the fastening element is at least one preferably only one, crotch element at a position distal to the mask body, said position being proximal to an occiput of a wearer when the mask is worn, preferably wherein the crotch element is substantially Y-shaped or X-shaped . Preferably, the cross element forms a one-piece structure.
    BRIEF DESCRIPTION OF THE FIGURES FIG. 1 illustrates a mask according to an embodiment of the disclosure, wherein FIG. 1A is a plan view showing the mask in a lay-flat condition, FIG. 1B is a schematic representation of a cross-sectional side view taken along a transverse edge of FIG. 1A, and FIG. 1C is a schematic representation of a bottom cross-sectional view taken along a longitudinal edge of FIG. 1A. fig. 2A-C illustrate a fastener according to embodiments of the disclosure.
    fig. 3 illustrates a fastener according to embodiments of the disclosure, wherein FIG. 3A is an exploded view of the laminate, and FIG. 3B and 3C are a plan view of said laminate.
    fig. 4A-B illustrate masks according to an embodiment of the disclosure according to views similar to those of FIG. 1B and 1C. DETAILED DESCRIPTION
    Unless otherwise defined, all terms used in disclosing features of the disclosure, including technical and scientific terms, have the meaning generally understood by one of ordinary skill in the art to which this invention belongs. As further guidance, definitions of terms are included to better understand the subject matter of the present invention. As used herein, the following terms have the following meanings: As used herein, "a", "the", "the" refer to both singular and plural referents unless the context clearly dictates otherwise. By way of example, "a compartment" refers to one or more compartments.
    As used herein, "approximately", when referring to a measurable value such as a parameter, an amount, a period of time, and the like, is understood to include variations of +/- 20% or less, preferably +/- 10 % or less, more preferably +/- 5% or less, even more preferably +/- 1% or less, and even more preferably +/- 0.1% or less of and from the specified value to the extent that the variations are suitable to work in the disclosed disclosure. It should be understood, however, that the value to which the modifier "approximately" refers is itself also specifically disclosed.
    "Include", "comprising", and "comprises" as used herein are synonyms of "including", "contains", "contain" and "consisting of", and are inclusive or open terms specifying the presence of what follows, e.g. a component, and which do not preclude the presence of additional, not mentioned components, features, elements, parts, steps known in the art or disclosed therein.
    "Single-part structure", as used herein, means forming a single component or being the same component, and by reference to a cross element(s), it typically includes a plurality of individual or discrete components which overlap to form a cross-like shape.
    > BE2021/5367 Unless otherwise defined, the term "wt%" (wt%), here and throughout the specification, refers to the relative weight of the respective component based on the total weight of the formulation.
    The use of the term "layer" may refer to, but is not limited to, any type of substrate, such as a woven web, a nonwoven web, films, laminates, composites, elastomeric materials or the like. A layer may be liquid and air permeable, air permeable but impermeable to liquids, impermeable to both air and liquid, or the like. When used in the singular, it can have the dual meaning of a single element or a plurality of elements, such as a laminate.
    The term "lay-flat condition" is intended to refer to the article when it is flattened in one plane or substantially flattened in one plane and is used in contrast to when the article is positioned differently, such as when the article is folded or shaped in or for use by a carrier.
    "Laminate" refers to elements bonded together in a layered arrangement. Specifying numeric ranges using endpoints includes all numbers and fractions that can be accommodated within that range, as well as the specified endpoints, unless otherwise noted.
    "Bound" refers to the joining, bonding, joining, fixing or the like of at least two elements. Two elements are considered bound together when they are directly bound to each other or when they are indirectly bound together, such as when they are each directly bound to intermediate elements.
    The term "consisting essentially of" does not exclude the presence of additional materials which do not significantly affect the desired properties of a given composition or product. Examples of materials of this kind include, but are not limited to, pigments, antioxidants, stabilizers, surfactants, waxes, flow improvers, solvents, particles and materials added to improve the processability of the composition.
    The term “disposable” is used herein to describe absorbent articles that are not normally intended to be washed or otherwise repaired or reused as an absorbent article (i.e., they are intended to be discarded after a single use and preferably recycled, composted or otherwise disposed of in an environmentally sound manner).
    "Back of the head" as used herein means the lower back of a wearer's skull, usually within the lower half of the back of the skull. "Joining", "joining together" or variations thereof, when used in describing the relationship between two or more elements, means that the elements can be joined together in any suitable way, such as by means of heat sealing, ultrasonic welding, thermal welding , by means of adhesives, stitching, or the like. Furthermore, the elements may be directly connected to each other, or one or more elements may be interposed, all of which are interconnected. As used herein, "body-facing" or "skin-facing" surface, or "body-facing" surface, means that surface of the article or component that is intended to be body-facing or to be placed adjacent to the wearer's body (e.g. face) during normal use, while the "outward", "outward-facing" surface is on the opposite side, and is intended to be placed on the opposite side during normal use of the wearer's body. to be directed away from the wearer. As used herein, the terms “elastic”, “elastomer”, “elasticity” or their derivatives are used to describe the ability of various materials and articles consisting thereof to undergo reversible deformation under stress, e.g. to to be stretched or elongated in at least one direction when a force is applied to the material, and to substantially resume their original dimensions upon relaxation, ie when the force is released, without cracking or breaking. Preferably, it refers to a material or composite material which can be extended in at least one direction by at least 50% of its relaxed length, i.e. extended to at least 150% of its relaxed length, and which upon release of the applied tension is at least at least 40% of the stretch will recover. Accordingly, upon release of the applied stress, the material or composite material contracts at 50% elongation to a relaxed length of no more than 130% of its original length. Examples of suitable elastomeric materials include polyether-polyamide block copolymers, polyurethanes, synthetic linear AB-A and AB block copolymers, chlorinated rubber/EVA (ethylene-vinyl acetate) blends, EPDM (ethylene-propylene-diene monomer) rubbers, EPM (ethylene-propylene monomer) rubbers, blends of EPDM/EPM/EVA, and the like.
    Embodiments of the articles and method of the disclosure will now be described. It is understood that technical features described in one or more embodiments may be combined with one or more other embodiments without departing from the intent of the disclosure and without generalization thereof.
    THE MASK With reference to Figs. 1-4, the mouth mask (1) may comprise: a mask body (2); and a fastening element (3) adapted to be placed over both ears, or the head, of a wearer to fasten the mask body (2) to a portion of a face of said wearer such that it has at least nose and mouth of said wearer when said mask is worn; wherein said mask body (2) comprises: an outer layer (4); and a filter layer (5), the filter layer (5) being positioned on a body-facing surface of said outer layer (4) such that when worn, said filter layer (5) is closer to said nose and mouth in comparison with said outer layer (4). Preferably, said filter layer (5) is a nonwoven laminate comprising at least one meltblown layer and at least one spunbond layer, and wherein said mask body (2) comprises at least two meltblown nonwoven layers. Advantageously, this device allows to maintain the required bacterial filtering while being a more cost effective solution compared to prior art masks using pure meltblown nonwovens as the filter layer. In one embodiment, the mouth mask may comprise: a mask body; and a fastener adapted to be placed over both ears, or the head, of a wearer to secure the mask body to a portion of a face of said wearer such that it covers at least the nose and mouth of said wearer when said mask is worn; wherein said mask body comprises: an outer layer; and a filter layer, wherein the filter layer is positioned on a body-facing surface of said outer layer such that when worn, said filter layer is closer to said nose and mouth as compared to said outer layer, and wherein the fastening element is at least one preferably only one, crotch element at a position distal to the mask body, said position being proximal to an occiput of a wearer when the mask is worn, preferably wherein the crotch element is substantially Y-shaped or X-shaped . Preferably, the cross element forms a one-piece structure. In addition, any of the following embodiments may be further included in this embodiment.
    Preferably, the mask body (2) comprises more than two meltblown nonwoven layers, preferably from 3 to 5, more preferably from 3 to 4 meltblown nonwoven layers. Advantageously, this arrangement makes it possible to increase the filter efficiency without having to increase the basis weight of a few or fewer layers of pure meltblown layers.
    In a particularly preferred embodiment, the mask body (2) comprises more than 20 g/m². meltblown fibers, preferably wherein the basis weight of meltblown fibers included in said mask body (2) is 21 g/m². up to and including 50 g/m² preferably of 22 g/m up to and including 45 g/m , more preferably from 23 g/m to 40 9/m2, even more preferably from 25 g/m up to and including 30 g/m°. Without wishing to be bound by theory, maintaining the proper basis weight of meltblown fibers in the product, particularly when using meltblown and spunbond nonwovens laminates, ensures that the optimum balance of bacterial filtration efficiency and reduced breathing resistance is achieved. reaches. Materials within these ranges are beneficial for this purpose.
    In one embodiment, at least the filter layer (5) and outer layer (4) comprise one or more meltblown layers, wherein the filter layer (5) comprises a first basis weight of meltblown fibers and the outer layer (4) comprises a second basis weight of meltblown fibers wherein the first meltblown fiber basis weight is greater than the second meltblown fiber basis weight, preferably wherein a ratio of said first meltblown fiber basis weight to said second meltblown fiber basis weight of 1.2 g/m² up to 8.0 g/m² is, preferably of 1.5 g/m up to and including 7 g/m2.
    In an alternative embodiment, at least the filter layer (5) and outer layer (4) comprise one or more meltblown layers, wherein the filter layer (5) comprises a first basis weight of meltblown fibers and the outer layer (4) comprises a second basis weight of meltblown fibers wherein the second basis weight of meltblown fibers is greater than the first basis weight of meltblown fibers, preferably wherein said second basis weight is greater than the basis weight of meltblown fibers in any of the other layers of the mask body, more preferably wherein a ratio from said second basis weight of meltblown fibers to said first basis weight of meltblown fibers is 1.2 to 8.0, preferably 1.5 to 7.
    The measurements of the basis weight of the meltblown fibers should preferably be performed on the nonwoven stock prior to conversion into a mask body or should be requested from the nonwoven manufacturer. If this is not possible, a sufficient non-woven sample of the finished masks should be obtained by manually removing the non-woven layers from the mask. The measurements should then follow the following basis weight measurement procedure: Coupon samples (25.4 mm x 25.4 mm and typically about 3 mm thick) are compression molded at 190°C per ASTM D4703-00 and cooled using from procedure B. Once the sample has cooled to 40-50°C, it is removed. Once the sample reaches 23°C, its dry weight and weight in isopropanol are measured using an Ohaus AP210 scale (Ohaus Corporation, Pine Brook NJ). Density (or as used herein, basis weight) is calculated as prescribed in Procedure B of ASTM D792.
    In one embodiment, the mask body (2) further comprises an inner layer (6) positioned on the body-facing surface of the filter layer (5) such that it is in direct contact with the face of said wearer when the mask is placed on. worn, preferably wherein said inner layer (6) comprises a spunbond nonwoven layer.
    Preferably, the mask body (2) has a bacterial filter efficiency (BFE) of greater than 96%, preferably greater than 97%, even more preferably at least 98%, most preferably 98% to 99.9%, according to method UNI EN 14683.
    The filter layer (5), the outer layer (4) and optionally the inner layer (6) consist of a synthetic polymer selected from the group consisting of polypropylene, polyethylene and mixtures thereof, most preferably consisting of 100% by weight polypropylene ( PP)
    or 100% by weight polyethylene (PE) by weight of said layer(s). Advantageously, this device allows for improved recycling benefits, especially when made of PP or PE.
    Preferably, the filter layer (5) comprises at least two meltblown layers, preferably said layers are in contact with each other. Advantageously, such a double layer allows crossovers in the fibers to be superimposed, which improves the filterability of the substrate more than a single meltblown layer at a comparable total basis weight.
    In one embodiment, the filter layer (5) comprises at least two spunbond layers and the meltblown layer(s) is sandwiched therebetween. Advantageously, this provides an improved perceived softness.
    In one embodiment, the outer layer (4) is free of meltblown layers, and optionally wherein the inner layer (6) is a nonwoven laminate comprising at least one meltblown nonwoven layer and at least one spunbond nonwoven layer, and preferably wherein said meltblown layer is positioned on an outwardly facing surface of the spunbond layer such that said spunbond layer contacts the wearer's face when the mask is worn.
    Alternatively, the outer layer (4) consists of a non-woven laminate comprising at least one spunbond non-woven layer and at least one meltblown non-woven layer, and optionally wherein the inner layer (6) is a non-woven laminate comprising at least one meltblown nonwoven layer and at least one spunbond nonwoven layer, and preferably wherein said meltblown layer is positioned on an outward facing surface of the spunbond layer such that said spunbond layer is in contact with the face of the wearer when the mask is worn.
    Preferably at least the outer layer (4) is hydrophobic and optionally the inner layer (6) is treated, such as with one or more surfactants to render it hydrophilic. In one Embodiment, the filter layer and the outer layer are hydrophobic and the inner layer is hydrophilic. Advantageously, these devices allow water vapor to permeate through the inner layer, but at least be trapped by the outer layer, which helps to reduce skin irritation with prolonged wear.
    In a preferred embodiment, the mask body (2) comprises an opposed first transverse edge (7) and second transverse edge (8) extending along a width of said mask body (2), and opposed first and second longitudinal edges (9). 10) extending along a length of the mask body (2) and connecting said first and second transverse edges (7, 8) to form a perimeter of said mask body (2) wherein the longitudinal edges (9, 10) are longer are then said transverse edges (7, 8) and wherein a pliable reinforcing element (11) is included along substantially the full length of each of said transverse edges (7, 8) and typically arranged to resist deformation caused by the tightening the fastening element (3) ) such that said transverse edges (7, 8) can rest on portions of the wearer's face without forming gaps or gaps between them between the wearer's face and said edges when the fastening element (3) is tightened.
    Preferably, the pliable reinforcing element (11) is dimensioned to have a length ranging from 80% to 100%, preferably from 85% to 99%, more preferably from 90% to 98%, of the width of said mask body (2) is; and a width which is from 5% to 15%, preferably from 6% to 10%, of the length of said mask body (2).
    Measurements in the present document are made in a lay-flat condition.
    Advantageously, this device provides for an improved wearing comfort.
    Preferably, the pliable reinforcing element (11) is selected from the group consisting of a hot melt adhesive, a foam, a metal wire, fused fibers, and combinations thereof.
    Typically, the pliable reinforcing element (11) comprises preferably a hot melt adhesive positioned between the filter layer (5) and at least one of the outer layer (4) and the inner layer (6). In one embodiment, each of the outer layer (4), the filter layer (5) and optionally the inner layer (6) comprises at least two pleats (12), preferably at least three pleats (12), arranged one above the other such that each fold of one of said layers is laid directly over the fold of an adjacent other said layer.
    Pleats on each layer of the mask are beneficial to allow additional elongation and coverage of the contours of a wearer's face and provide adequate room and clearance of the nose to limit breathing difficulties.
    In a preferred embodiment, the mask body (2) further comprises a semi-rigid element (13) such as a metal wire positioned along an edge thereof to be placed adjacent the nose of the wearer when the mask is worn, preferably wherein said semi-rigid element (13) is positioned along the first longitudinal edge (9). Preferably, the semi-rigid element (13) is bonded to the body-facing surface of the outer layer (4), which is oversized such that said layer folds over and around said semi-rigid element (13) to collapse it therein. to enclose a C-fold. Advantageously, this allows an effective way of attaching the element to the mask with strong mechanical resistance, while limiting the overall use of material. In one embodiment, the fastening element (3) is connected to the outward facing surface of the outer layer (4) and said outer layer (4) being oversized compared to the other layer(s) such that at least at least a first and second opposing longitudinal edges (14, 15) are folded over themselves such that a body-facing surface of said outer layer (4) is joined to a body-facing surface of the filter layer (5) or inner layer (6) forming a C-fold, and wherein the fastening element (3) abuts the wearer's face when worn. This device has the advantage that it provides additional reinforcement for the attachment of the fastening element and ultimately improves comfort for longer periods, while limiting the risk of splitting or detachment of the fastening element from the mask body.
    Alternatively, the fastener (3) is bonded to the outwardly facing surface of the outer layer (4) and said outer layer (4) being oversized compared to the other layer(s), such that at least one first and a second opposing longitudinal edges (14, 15) are folded over themselves such that a body-facing surface of said outer sheet (4) is joined to a body-facing surface of said same sheet (4) whereby a C-fold is formed, and wherein the fastening element (3) abuts the wearer's face when worn.
    In one embodiment, the filter layer (5) has a basis weight of less than 45 g/m 2 , preferably less than 41 g/m 2 , more preferably less than 30 g/m 2 , preferably 10 g/m 2 . up to and including 29 g/m°, more preferably from 12 g/m² up to and including 28 g/m , even more preferably from 14 g/m up to and including 27 g/m°, even more preferably from 15 g/m² up to and including 26 g/m°, even more preferably from 20 g/m² up to 25 g/m2.
    Preferably, the mask further comprises a longitudinal sealing pattern (16) extending along at least one, preferably both, of the first and second longitudinal edges (9, 10). Preferably, the mask further comprises at least two sealing blocks (100) on either side of the semi-rigid element (13), typically such that together with the sealing cartridge (16) a circumferential sleeve is formed which surrounds the entire element (13). Advantageously, this makes it possible to hold the element in a better position and prevent sliding while minimizing the use of adhesives.
    Preferably, at least a portion of the periphery of the mask body (2) comprises a hot-melt adhesive and wherein a central portion (17) disposed within and surrounded by said periphery is free of adhesive, such that all layers of the mask body (2) can move freely with respect to each other in said central portion (17). Advantageously, this device reduces breathing resistance and also lowers assembly costs.
    In a particularly preferred embodiment, the attachment element (3) comprises at least one, preferably at least two, cross element (18) at a position distal to the mask body (2), said position being proximal to an occiput of a wearer when the mask is worn, preferably wherein the crotch element (18) is substantially Y-shaped or X-shaped. Advantageously, this arrangement provides for an improved comfort. In addition, in combination with a reinforcing non-woven material as described herein, it helps to create lateral drainage to reduce fogging of glasses when worn by a person in combination with the mask.
    In one embodiment, the fastening element (3) comprises at least one, preferably at least two, connecting element (19) extending between two successive cross elements (18). Preferably, the attachment element (3) comprises at least four end elements (20), typically one for each branch (21) of the cross element (18), and each end element (20) is connected to the mask body (2). The length of each connecting element (19) is preferably greater than the distance between end elements (20) along an axis substantially perpendicular to said length. Preferably, the fixing element (3) comprises, preferably consists of, a laminate comprising an elastic layer (22) and at least one non-woven layer (23), preferably wherein the elastic layer is sandwiched between at least two non-woven fabrics. woven layers, more preferably wherein the elastic layer (22) comprises an elastic film or a plurality of elastic strands, typically consisting thereof. Advantageously, this allows for cheaper elastics compared to known knitted elastics used in masks.
    Preferably, the elastic layer (22) has a circumference that is less than a circumference of the non-woven layer (23) such that one or more void zones (24) free of elastic layer are formed at least along a longest size of the fixing element (3). Typically wherein the nonwoven layer (23) is selected from a spunbond (S), spunbond-meltblown (SM), spunbond-meltblown-spunbond (SMS) and spunbond-meltblown-meltblown-spunbond (SMMS) layer. Advantageously, this allows softness, at least on the surface in contact with the wearer's skin, while maintaining acceptable mechanical tear resistance.
    Alternatively, the fastener (3) comprises, preferably consists of, one or more elastic knitted strands, preferably comprising: at least 25% by weight, preferably at least 30% by weight polyamide; at least 25% by weight, preferably at least 30% by weight polyester; and at least 25% by weight, preferably at least 30% by weight elastane; and is typically latex free. In a preferred embodiment, the fastening element (3) comprises, preferably consists of, a laminate comprising an elastic layer (22) and at least one non-woven layer (23), preferably wherein the elastic layer is sandwiched between at least two non-woven layers. woven layers, more preferably wherein the elastic layer (22) comprises an elastic film, typically consisting thereof, and wherein the elastic film is bonded to the non-woven layer by mechanical bonding, preferably ultrasonic bonding, such that a plurality of bonds having a first density is formed. Typically wherein the two nonwoven layers are bonded together in zones outside the elastic film by mechanical bonding, preferably ultrasonic bonding, such that a plurality of second density bonds are formed, and wherein the first density is greater than the second density such that the laminate forms a plurality of accordion-like peaks and valleys or folds, at least in a region of the laminate which overlaps with the film and/or outside said film when in a relaxed state. Advantageously, this makes it possible to reduce constriction, which is desirable, especially when knitted elastics are not used. In a preferred embodiment, the air permeability of each layer of the mask body (2) is from 100 I/m 2 /s to 550 I/m 2 /s, preferably from 130 I/m 2 /s to 450 I/s m 2 /s, according to method WSP 70.1 (15) from INDA and EDANA.
    Preferably, each layer of the mask body (2) has a pressure difference of less than 55 Pa/cm 2 , preferably 5 Pa/cm 2 . to 54 Pa/cm , more preferably from 10 Pa/cm up to 53 Pa/cm2, according to method UNI EN 14683. For measurements in this document, the test method according to UNI EN 14683 is performed with the following test modality: Nitrogen or air flow through a sample sandwiched between aluminium/Teflon flanges. Gas flow rate: 48.2 + 5% litres/min on a cross section of a round passage with a diameter of 60 mm, corresponding to 8 litres/min on a cross section of 25 mm. Measuring instrument: GE DRUCK LPM9381 range -10/+10 mbar, 1/1000 FS, 5V output. Measurement uncertainty + 10%. Advantageously, this reduces breathing problems. In one embodiment, the mask body (2) comprises a reinforcing non-woven material (24) applied over the outer layer (4) and/or inner layer (6), such that a portion of the fastening element (3), comprising at least the part thereof, which is bonded to the outward facing surface of the outer layer (4), is arranged between said reinforcing non-woven layer (24) and said outer layer (4), preferably wherein said reinforcing non-woven layer (24 ) is in the form of at least two distinct strips of non-woven material disposed on, and extending along, each of the first and second transverse edges (7, 8). Typically wherein said layers are joined by a bonding element (25) selected from the group consisting of adhesive, mechanical bonding and combinations thereof.
    THE TREATMENT COMPOSITION OF THE MASK In some embodiments, the masks of the present document may comprise a treatment composition having bactericidal properties.
    Preferably, at least the filter layer (5) comprises a bactericidal composition comprising one or more metal oxides, preferably selected from the group consisting of zinc oxide, copper oxide and mixtures thereof, preferably zinc oxide. Advantageously, this allows the mask to be worn for longer than the typically recommended 4 hour period of standard surgical masks on the market. Further, such materials can be easily suspended and applied directly in-line in the lamination process to form the mask bodies.
    Alternatively, or additionally, the above-mentioned bactericidal composition may be included on the outer layer (4). Without wishing to be bound by theory, the bactericidal effectiveness of metal oxides, and in particular zinc oxide, is enhanced by further exposure to light. By ensuring that the outermost layer typically most exposed to light comprises such a composition, even more effective bactericidal effectiveness of the mask over a wider range of bacterial strains is allowed.
    The composition may comprise at least 5 wt% metal oxides, preferably from 7 wt% to 35 wt%, more preferably from 10 wt% to 30 wt%, based on the weight of the compound.
    In a preferred embodiment, the metal oxides are in the form of nanoparticles having an average diameter of from 10 nm to 100 nm, preferably from 15 nm to 85 nm, even more preferably from 16 nm to 70 nm, with the most preferably from 17 nm to 50 nm. Advantageously, this allows easy dispersion and effectiveness of coating and bactericidal activity.
    In a preferred embodiment, the composition is typically applied in the form of a, preferably uniform, colloidal suspension. Nanoparticles of metal oxides herein are typically resuspended in sterile double-distilled water and sonicated (e.g., using an ultrasonic bath at a frequency greater than 20 kHz) to form such a colloidal suspension, typically for application to a mask substrate. .
    Preferably, the composition is applied, e.g. by spraying before laminating the layers to form the mask body (2).
    It is understood that the present invention is not limited to any embodiment previously described and that some modifications may be added to the proposed manufacturing example without re-evaluation of the appended claims.
    权利要求:
    Claims (15)
    [1]
    A mouth mask (1) comprising: a mask body (2); and a fastening element (3) adapted to be placed over both ears, or the head, of a wearer to fasten the mask body (2) to a portion of a face of said wearer such that it has at least nose and mouth of said wearer when said mask is worn; wherein said mask body (2) comprises: an outer layer (4); and a filter layer (5), the filter layer (5) being positioned on a body-facing surface of said outer layer (4) such that when worn, said filter layer (5) is closer to said nose and mouth in comparison with said outer layer (4), characterized in that said filter layer (5) is a non-woven laminate comprising at least one meltblown layer and at least one spunbond layer, and in that said mask body (2) has at least two meltblown non-woven woven layers, wherein the mask body (2) comprises more than 20 g/m meltblown fibers, and wherein the filter layer (5) and the outer layer (4) comprise fibers comprised of a synthetic polymer selected from the group consisting of polypropylene, polyethylene, and mixtures thereof.
    [2]
    The mask of claim 1, wherein the mask body (2) comprises more than two meltblown nonwoven layers, preferably from 3 to 5, more preferably from 3 to 4 meltblown nonwoven layers.
    [3]
    A mask according to any one of the preceding claims, wherein the basis weight of meltblown fibers comprised in said mask body (2) is 21 g/m². up to and including 50 g/m² preferably of 22 g/m up to and including 45 g/m , more preferably from 23 g/m up to and including 40 g/m , even more preferably from 25 g/m up to and including 30 g/m°.
    [4]
    A mask according to any one of the preceding claims, wherein the mask body (2) further comprises an inner layer (6) positioned on the body-facing surface of the filter layer (5) so as to be in direct contact with the face. of said carrier when the mask is worn, preferably wherein said inner layer (6) comprises a spunbond non-woven layer.
    [5]
    A mask according to any one of the preceding claims, wherein the mask body (2) has a bacterial filter efficiency (BFE) of greater than 96%, preferably greater than 97%, even more preferably at least 98%, most preferably 98 % to 99.9%, according to method UNI EN 14683.
    [6]
    A mask according to any one of the preceding claims, wherein the filter layer (5) comprises at least two meltblown layers.
    [7]
    A mask according to any one of the preceding claims, wherein the filter layer (5) comprises at least two spunbond layers and the meltblown layer(s) is sandwiched therebetween.
    [8]
    The mask of any preceding claim, wherein the outer layer (4) consists of a non-woven laminate comprising at least one spunbond non-woven layer and at least one meltblown non-woven layer, and optionally wherein the inner layer ( 6) is a nonwoven laminate comprising at least one meltblown nonwoven layer and at least one spunbond nonwoven layer, and preferably wherein said meltblown layer is positioned on an outward facing surface of the spunbond layer such that said spunbond layer is in contact with the wearer's face when the mask is worn.
    [9]
    A mask according to any one of the preceding claims, wherein at least the outer layer (4) is hydrophobic and optionally wherein the inner layer (6) is treated, such as with one or more surfactants to render it hydrophilic.
    [10]
    A mask according to any one of the preceding claims, wherein the mask body (2) comprises an opposed first transverse edge (7) and second transverse edge (8) extending along a width of said mask body (2), and opposed first and second longitudinal edges (9, 10) extending along a length of the mask body (2) and connecting said first and second transverse edges (7, 8) to form a perimeter of said mask body (2) wherein the longitudinal edges (9, 10) are longer than said transverse edges (7, 8), and wherein a pliable reinforcing element (11) is included along substantially the full length of each of said transverse edges (7, 8) and typically arranged to deform to resist caused by the tightening of the fastening element (3) ) such that said transverse edges (7, 8) can rest on portions of the wearer's face without opening and/or to form gaps between the wearer's face and said edges when the fastening element (3) is tightened.
    [11]
    The mask of claim 10, wherein the pliable reinforcing element (11) is selected from the group consisting of a hot melt adhesive, a foam, a metal wire, fused fibers, and combinations thereof.
    [12]
    A mask according to any one of the preceding claims, wherein the fastening element (3) is connected to the outward facing surface of the outer layer (4) and wherein said outer layer (4) is over-sized compared to the other layer(a)g (and), such that at least a first and second opposing longitudinal edges (14, 15) are folded over themselves such that a body-facing surface of said outer sheet (4) is joined to a body-facing surface of the filter layer (5) or inner layer (6) forming a C-fold, and wherein the fastening element (3) is adjacent to the wearer's face when worn.
    [13]
    A mask according to any one of the preceding claims, wherein the fastening element (3) comprises at least one, preferably at least two, cross element (18) at a position distal to the mask body (2), said position being proximal to a back of a wearer's head when the mask is worn, preferably wherein the crotch element (18) is substantially Y-shaped or X-shaped.
    [14]
    Mask according to any one of the preceding claims, wherein the fastening element (3) comprises, preferably consists of, a laminate comprising an elastic layer (22) and at least one non-woven layer (23), preferably wherein the elastic layer is sandwiched between at least two non-woven layers, more preferably wherein the elastic layer (22) comprises, typically consisting of, an elastic film or a plurality of elastic strands.
    [15]
    The mask of claim 14, wherein the elastic layer (22) has a circumference that is smaller than a circumference of the non-woven layer (23) such that one or more void zones (24) free from the elastic layer are formed. formed at least along a longest dimension of the fastener (3).
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    同族专利:
    公开号 | 公开日
    WO2021244974A1|2021-12-09|
    EP3918936A1|2021-12-08|
    EP3918936A4|2021-12-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2009130799A1|2008-04-24|2009-10-29|Miyao Shunsuke|Multilayered mask|
    US20170246832A1|2016-02-25|2017-08-31|Avintiv Specialty Materials Inc.|Nonwoven fabrics with additive enhancing barrier properties|
    CN108771294A|2018-08-27|2018-11-09|无锡市钰汌工贸有限公司|A kind of mask|
    US4802473A|1983-11-07|1989-02-07|Tecnol, Inc.|Face mask with ear loops|
    US6427693B1|2000-05-01|2002-08-06|Kimberly-Clark Worldwide, Inc.|Face mask structure|
    法律状态:
    2021-11-17| FG| Patent granted|Effective date: 20211020 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP20177673.9A|EP3918936A1|2020-06-01|2020-06-01|Face mask|PCT/EP2021/064382| WO2021244974A1|2020-06-01|2021-05-28|Face mask|
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