EP4258922A1 - Élément de couverture pour la bouche et le nez - Google Patents

Élément de couverture pour la bouche et le nez

Info

Publication number
EP4258922A1
EP4258922A1 EP21835668.1A EP21835668A EP4258922A1 EP 4258922 A1 EP4258922 A1 EP 4258922A1 EP 21835668 A EP21835668 A EP 21835668A EP 4258922 A1 EP4258922 A1 EP 4258922A1
Authority
EP
European Patent Office
Prior art keywords
mouth
nose
nose cover
layer
wearer
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21835668.1A
Other languages
German (de)
English (en)
Inventor
Matthias Dietze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solida AG
Original Assignee
Solida AG
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 Solida AG filed Critical Solida AG
Publication of EP4258922A1 publication Critical patent/EP4258922A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • 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
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0609—Knitted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0627—Spun-bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0672—The layers being joined by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters

Definitions

  • the invention relates to a mouth-nose cover with at least three flexible, air-permeable layers arranged parallel to one another, one layer of which faces the body of the wearer when the mouth-nose cover is in use and covers the area of the mouth and nose, with a connection area, in which the layers are connected to each other and which runs around the edge area or adjacent to the edge area of the mouth and nose cover, with at least one of the middle layers being equipped with bacterial filter material.
  • a mouth and nose cover serves the wearer of the mask on the one hand and the environment on the other. In both directions, it should be avoided that bacteria, viruses, dirt and other particles in the air get out of the breathing area or into the breathing area of the wearer of the mask and thus lead to infection or contamination of the environment, for example.
  • Various types of mouth and nose covers of this type have been in use for decades and are required in the billions. In this context, use is to be considered above all in medical areas of application, i.e. by medical and nursing staff in hospitals, homes, in doctor’s offices, in emergency vehicles or also in home care, but also generally in areas where people meet.
  • Such medical face masks usually have a rectangular shape with a drape so that the mask can adapt to the face.
  • the masks have ear loops and a wire nose clip and defined filter properties.
  • FFP Particle filtering half masks
  • FFP is an abbreviation of the English words "Filtering Face Piece”. These masks belong to the "Personal Protective Equipment” product category.
  • These masks are also known as dust masks. They are usually dome-shaped or foldable in a form reminiscent of coffee filters and also protect the wearer of the mask from particles and Trabant aerosols.
  • Such breathing masks are known, for example, from DE 20 2009 006 455 U1, but also from many other publications and from practice.
  • Such a medical mouth and nose cover (often abbreviated as MNS), which is produced billions of times worldwide, is usually made up of three layers of material in a relatively simple manner. This applies in particular to the construction of mouth and nose covers known as "flat masks".
  • Two outer layers ie an inner layer adjacent to the wearer's body and an outer layer facing away from the wearer's body, are each made from a SPUN BON D fleece. This material is also referred to as "non-woven”. It is a polypropylene material that has proven itself for these purposes, is very inexpensive and also welds well.
  • This welding not only holds the three layers together, but at the same time also closes off the center to the outside in order to prevent the inhaled or exhaled air flow between the layers from escaping to the side to the outside.
  • the object of the invention is therefore to further improve a mouth and nose cover with the generic properties.
  • This object is achieved by means of the invention in a mouth-nose cover of the generic type in that at least the layer adjacent to the body of the wearer of the mouth-nose cover is designed with air spaces in its interior.
  • the central task of a mouth and nose cover or a medical mask is to provide a certified bacterial filter performance. This is primarily generated by the intermediate layer, which is not modified according to the invention.
  • the improved version according to the invention achieves the same results as previous masks, which also work very well.
  • the invention departs from this and uses a material which has air spaces in its interior.
  • This layer placed between the bacterial filter and the support, serves to shield the filter from contact with the skin and to hold it in place.
  • This task is also performed by a filter material that is equipped with air spaces on the inside.
  • the disadvantage of this material is of course that it is much more expensive than the traditional, cheaply available standing spunbond webs made of polypropylene. A person skilled in the art would therefore not even consider an expensive material with air spaces for economic reasons.
  • the air spaces mean that the bacterial filter is kept at a distance from the skin of the wearer of the mouth-nose cover, namely by the volume fractions not occupied by the air spaces, and on the other hand a significantly better breathability and skin-friendliness can be achieved than is possible with conventional masks.
  • the breathing air of the wearer of the mask can easily penetrate through the air spaces and thus encounter significantly less breathing resistance. It is precisely this resistance or the unfavorable breathability that has made it very difficult to wear conventional masks. This applies in particular if you have to wear such masks all day or at least for longer periods of time, which is the case in medical applications. By wearing it during work processes, for example during an operation, it is also often not possible to move or remove the mask, which severely impairs breathing, since the environment can then be impaired.
  • the air spaces inside this layer mean that the respiratory streams flow unchanged through the mask and in particular through the middle layer having the bacterial filter, both when inhaling and when exhaling, and are thus filtered.
  • a person skilled in the art therefore finds, to his own surprise, that unexpected and quite significant advantages can be achieved with this material. They can be worn longer without reducing their filtering ability and, most importantly, without irritating the wearer. They affect the wearer less in his work and are also better accepted by the wearer than conventional filter masks.
  • the layer adjacent to the body of the wearer of the mouth-nose cover is constructed from a knitted fabric made from monofilaments, in particular from polyamide fibers, in particular from a knitted micromesh material made from polyamide.
  • polyester In addition to polyamide, the use of polyester (PES) has also proven to be very advantageous. Also in this case it is about a knitted fabric.
  • polylactide also known as polylactic acid. This material has the added benefit of being used in biodegradable disposable masks.
  • Polylactid or polylactic acid is a biodegradable yarn.
  • Polylactide also has a melting point of about 160° and could therefore be used as a biodegradable inner layer for machine production of the mouth and nose protectors according to the invention.
  • the mouth and nose coverings according to the invention can in particular have the shape of medical face masks, ie a rectangular shape with a fold so that the mask can adapt to the face.
  • the outside can also be colored and the back can be white, but other variations are also possible.
  • the masks can also have ear loops and a nose clip.
  • a shape as a particle-filtering half mask with a dome shape or a shape that can be folded in the manner of a coffee filter is also possible.
  • All three yarns i.e. PA (polyamide), PES (polyester) and PLA (polylactide), are so-called monofilaments.
  • Monofilaments consist of one capillary thread, in contrast to so-called multifilaments, in which the thread consists of several capillary threads. Because the three yarns are monofilaments, they are also moisture-wicking. In the mouth-nose-covering filters form This means that there is no accumulation of moisture, which would be detrimental to the purpose of hygiene and would also impede breathing.
  • particle abrasion which is also known as shredding, with all three monofilaments.
  • bonded short fibers such as spunbond nonwovens, where particle abrasion can also occur, depending on the processing quality.
  • a textile material is therefore used which has an open mesh structure, i.e. different from the closed, dense surface that is formed with polypropylene fleece.
  • the open mesh structure creates an air space between the wearer's skin and the filter area.
  • a continuous yarn made of polyamide (PA), for example is a so-called monofilament.
  • PA polyamide
  • a monofilament made of polyamide continuous yarn does not absorb moisture. The moisture can thus be transported through the mesh spaces to the polypropylene filter area.
  • Chemical continuous yarns such as polyamide (PA), polyester (PES), low melt polyester (LMPES) and polylactide (PLA) are therefore preferred. These solidify again when they solidify again after reaching the melting point for the welding process and subsequent cooling.
  • the layer of the mouth and nose covering adjacent to the wearer is therefore preferably formed by a knitted fabric.
  • a knitted fabric is not formed using warp or weft threads, but is made up of loops. From a physical point of view, holes or air spaces are created in the knitted fabric in this way. These holes make it possible for air to pass through or for the exhaled or inhaled gas to pass through. These holes for the passage of air are now in this position and of course not in the bacterial filter.
  • the mask according to the invention can now offer the wearer significantly better and freer breathing, with the bacterial filter effect being identical due to the unchanged filter position.
  • Such a reduced impairment of the breathing process and thus much freer breathing is an enormous advantage, especially when using the mask all day or at least for a longer period of time, which represents a considerable increase in comfort and of course also enables the wearer to concentrate more due to the less disruption caused by the mask the mask is done.
  • the inner layer facing the wearer's body and made of a knitted micromesh material made of polyamide, polyester or polylactide is perceived by the wearer as being significantly more comfortable.
  • a kind of silky character develops, since the knitting makes it more natural Contact surface instead of the previous one-piece spunbond webs or non-woven layers produced in the direct process.
  • the masks are preferably produced on machine systems in which the three or, in certain embodiments, four layers are welded to one another in the edge areas either by ultrasonic welding, or by so-called thermobonding.
  • machine systems in which the three or, in certain embodiments, four layers are welded to one another in the edge areas either by ultrasonic welding, or by so-called thermobonding.
  • micromesh materials made of polyamide, polyester or polylactide have a significant weight advantage over the spunbond fleece layers. They are therefore significantly lighter and therefore place less stress on the wearer.
  • the respirator according to the invention is particularly kind to the skin. It is also extremely breathable.
  • the breathing mask according to the invention provides bacterial protection due to its structure.
  • Embodiments of the inventive breathing mask can be flexibly adapted to different face shapes by means of individually adjustable straps.
  • the respirator according to the invention is particularly advantageous as a hygienic single-use product.
  • the inner layer consists of two layers of the knitted fabric in the form of a micromesh.
  • a further layer of the micromesh material with its silky character is therefore inserted between the first layer, which is in direct contact with the skin, and the intermediate layer made of the filter material.
  • this additional layer can be provided without exceeding the weight of traditional respirators. Nevertheless, the two layers make it possible to catch the water vapor passing through between the two layers, i.e. to improve the filter effect and still keep the air permeability very good. Due to the additional paths that are formed for the amounts of air passing through, breathing through such a respirator mask is easier, which means that wearing the mouth and nose cover is perceived as less stressful.
  • the air spaces in the layer between the middle layer with the bacterial filter material on the one hand and the skin of the wearer of the mouth and nose cover on the other hand are - as described - preferably produced by an open mesh structure in a textile material. This allows the desired properties to be achieved.
  • An open mesh structure always leads to a certain elasticity in a textile material, both in a woven fabric and in a knitted fabric, depending on the mesh size.
  • This elasticity in the running direction can preferably be taken into account when producing the masks. Due to the tensile force when the material is pulled in, the elastic material expands in the longitudinal direction and simultaneously contracts in the transverse direction, i.e. tapers in the transverse direction.
  • the material is now preferably used in textile technology as a right-left knitted fabric and is stretched out lengthwise in a stenter and heat-set. As a result, the longitudinal elasticity is almost zero, but the lightness and air permeability of the material are retained. Only after heat setting is the material cut to the desired web width and rolled up, whereas the previously produced in a larger width on the knitting machine.
  • the outer layer 30 facing away from the body of the wearer of the mouth and nose cover is designed with an overhang at the upper and lower edge of the mask, which is folded over and placed on the body of the wearer's mouth -The inner layer adjacent to the nose cover is placed and welded. If you work with such an overhang, the polyamide is stably edged and welded. As has been shown in tests, additional welding on the sides is unnecessary.
  • a further advantage of the monofilaments for the polyamide in the layer of the mouth and nose covering compared to the prior art polypropylene fleece is that there is no particle abrasion, which is also referred to as so-called shredding.
  • FIG. 1 shows a schematic section through an embodiment of a mouth and nose cover according to the invention.
  • FIG. 1 shows a mouth-and-nose cover shown in schematic form in section.
  • the mouth and nose covering consists of four layers 10, 11, 20, 30.
  • the layer 10 is closest to a body 5 of a wearer of the mouth and nose covering. This consists of a micromesh material in knitted form Polyamide.
  • the second layer 11 consists of the same material and is arranged parallel to the surface of the first layer 10 .
  • the following next layer 20, seen from the wearer’s body 5, is a bacterial filter which, in particular, prevents bacteria, viruses and microorganisms from moving outwards from the wearer’s skin or from the mouth 6 and nose, or from the environment into the mouth and nose openings or on the skin of the wearer.
  • This layer 20 made of bacterial filter material is then in turn covered on the outside by an outer layer 30 .
  • this also consists of the polyamide of the micromesh structure; in other embodiments, a layer of spunbond fleece is selected here.
  • bracket-like attachments can be provided on the outside, as usual, with which the mouth and nose cover is held on the ears or in another form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention concerne un élément de couverture pour la bouche et le nez qui comprend au moins trois couches perméables à l'air, souples, disposées de manière parallèle les unes par rapport aux autres, une couche (10) étant orientée face au corps de l'utilisateur et recouvrant la zone de la bouche et du nez pendant l'utilisation, comprenant une zone de liaison dans laquelle les couches sont reliées les unes aux autres et qui s'étend autour dans la zone de bord ou de manière adjacente à la zone de bord de la protection pour la bouche et le nez, au moins une des couches intermédiaires comprenant un matériau filtrant les bactéries. Au moins la couche (10) adjacente au corps de l'utilisateur de l'élément de couverture pour la bouche et le nez comprend des espaces d'air à l'intérieur de celle-ci. La couche est constituée en particulier d'un matériau à microréseau maillé à base de polyamide, polyester ou acide polylactique.
EP21835668.1A 2020-12-09 2021-12-08 Élément de couverture pour la bouche et le nez Pending EP4258922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020132746 2020-12-09
PCT/EP2021/084722 WO2022122794A1 (fr) 2020-12-09 2021-12-08 Élément de couverture pour la bouche et le nez

Publications (1)

Publication Number Publication Date
EP4258922A1 true EP4258922A1 (fr) 2023-10-18

Family

ID=79185392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21835668.1A Pending EP4258922A1 (fr) 2020-12-09 2021-12-08 Élément de couverture pour la bouche et le nez

Country Status (2)

Country Link
EP (1) EP4258922A1 (fr)
WO (1) WO2022122794A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200316234Y1 (ko) * 2003-03-03 2003-06-12 박성용 건강성유지를 이용한 마스크
KR200386879Y1 (ko) * 2005-03-26 2005-06-16 권영아 방향제 항균필터를 교체할 수 있는 은 니트 마스크
DE202009006455U1 (de) 2009-04-29 2009-09-03 Katfil Gmbh Atemschutzmaske
CN111331955B (zh) * 2020-02-24 2021-04-13 华中科技大学 一种多功能防护材料及其生产方法和应用
DE202020101544U1 (de) * 2020-03-22 2020-07-30 SCi Kontor GmbH Mehrlagige Maske innenliegender Membran
DE202020101786U1 (de) * 2020-04-02 2020-05-04 SCi Kontor GmbH Mehrlagiger Filter für einen wiederkehrenden Gebrauch und Reinigungsmöglichkeit
DE202020102548U1 (de) * 2020-05-06 2020-05-15 Falke Kgaa Hygienemaske
KR102161587B1 (ko) * 2020-06-16 2020-10-05 김수연 나노섬유필터 및 그 제조방법

Also Published As

Publication number Publication date
WO2022122794A1 (fr) 2022-06-16

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