EP3892341A1 - Masque de protection respiratoire - Google Patents

Masque de protection respiratoire Download PDF

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Publication number
EP3892341A1
EP3892341A1 EP20168997.3A EP20168997A EP3892341A1 EP 3892341 A1 EP3892341 A1 EP 3892341A1 EP 20168997 A EP20168997 A EP 20168997A EP 3892341 A1 EP3892341 A1 EP 3892341A1
Authority
EP
European Patent Office
Prior art keywords
nonwoven
protection mask
respiratory protection
mask according
nonwoven webs
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.)
Withdrawn
Application number
EP20168997.3A
Other languages
German (de)
English (en)
Inventor
Ralf Sauer
Jan Schultink
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.)
Eurofilters Holding NV
Original Assignee
Eurofilters Holding NV
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 Eurofilters Holding NV filed Critical Eurofilters Holding NV
Priority to EP20168997.3A priority Critical patent/EP3892341A1/fr
Priority to DE202020102102.8U priority patent/DE202020102102U1/de
Publication of EP3892341A1 publication Critical patent/EP3892341A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1161—Means for fastening to the user's head
    • 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
    • A41D13/1123—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a duckbill configuration
    • 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
    • A41D13/113—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a vertical fold or weld
    • 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
    • A62B18/025—Halfmasks
    • 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

Definitions

  • the invention relates to a respirator.
  • Respiratory masks regularly cover the mouth and nose of the wearer and serve to protect the wearer from pollutants contained in the air and to protect the environment from exhaled bacteria and viruses.
  • Conventional respiratory masks are regularly manufactured on special machines. They have surface folds and / or are shaped three-dimensionally in order to follow the shape of the face of the wearer. Such respiratory masks are expensive to manufacture.
  • the object of the invention is to provide a respirator that can be used on existing manufacturing facilities, for. B. for vacuum cleaner bags can be produced quickly and thus in large numbers. This object is achieved by the subject matter of claim 1.
  • a respirator comprising two superposed webs of a nonwoven fabric and at least one fastening tape, the nonwoven webs being partially welded to one another along their edge, and wherein the at least one fastening tape is designed for fastening the respirator to the head.
  • nonwovens Due to the structure of two superposed nonwoven webs, which are partially welded together along their edge, manufacturing systems for flat bags, in particular for vacuum cleaners, can be used for the manufacture of the respiratory mask according to the invention.
  • the use of nonwovens enables the two webs of nonwoven to be joined by means of ultrasonic welding.
  • the use of nonwovens allows the desired filter performance to be set in a controlled manner with high air permeability. Incidentally, nonwovens result in a good fit of the respirator.
  • the superimposed and welded nonwoven webs form the filter part of the respirator, with which the inhaled and exhaled air is filtered.
  • a "nonwoven fabric” denotes a random structure that has undergone a consolidation step (fleece binding step) so that it has sufficient strength to be wound or unwound into rolls, in particular by machine (that is to say on an industrial scale) such winding minimum required web tension is 0.044 N / mm.
  • the web tension should not be higher than 10% to 25% of the minimum maximum tensile force (according to DIN EN 29073-3: 1992-08) of the material to be wound. This results in a minimum maximum tensile force for a material to be wound up of 8.8 N per 5 cm strip width.
  • non-woven fabric corresponds to a random structure which, however, has not undergone a consolidation step, so that, in contrast to a nonwoven, such a random structure does not have sufficient strength to be wound or unwound mechanically, for example to become.
  • nonwoven is used in accordance with the definition according to ISO standard ISO 9092: 1988 or CEN standard EN 29092. Details on the use of the definitions and / or procedures described therein can also be found in the textbook " Nonwovens ", H. Fuchs, W. Albrecht, WILEY-VCH, 2012 , remove.
  • the two nonwoven webs can have a polygonal shape, the nonwoven webs not being welded along one edge.
  • the shape of the nonwoven webs can in particular be rectangular.
  • Both nonwoven webs can have the same shape and dimensions; in particular, they can lie precisely on top of one another.
  • the filter part of the (finished but unused) respiratory protection mask can (in plan view) have a polygonal, in particular rectangular shape.
  • the nonwoven webs can be welded along all other edges. This leaves exactly one unsealed edge of the polygon.
  • the non-welded edge creates the opening of the respiratory mask for the face of the wearer / user.
  • the non-welded edge can in particular be one of the long edges of the rectangle.
  • One or both nonwoven webs can have a multilayer structure. In particular, they can be made up of several layers of nonwoven fabric. A specific selection of the individual nonwoven layers and their parameters enables the filter properties of the respirator to be set in a controlled manner.
  • the nonwoven fabric layers can be a staple fiber nonwoven fabric (in particular produced by means of dry processes or wet processes), one produced by means of solvent processes Comprise nonwoven fabric and / or an extrusion nonwoven fabric.
  • filament spunbonded nonwovens also referred to as “spunbonded nonwovens” or “spunbond” for short
  • meltblown nonwovens can be used.
  • One or more layers of the bag wall can comprise a carded material. Both mechanical processes (e.g. needling) and thermal processes (e.g. calendering) can be used as the binding step. It is also possible to use binding fibers or adhesives, such as a latex adhesive. Airlaid materials are also possible.
  • the nonwoven fabric of one or more layers can comprise bicomponent fibers.
  • Bicomponent fibers can be formed from a core and a sheath enveloping the core.
  • the bicomponent fibers can be present as staple fibers or as filaments in the case of an extrusion nonwoven (for example meltblown nonwoven).
  • a multilayer nonwoven web can have a meltblown layer between two carrier layers.
  • the meltblown system enables high filter performance.
  • One or both carrier layers can be a nonwoven fabric, in particular a spunbond or a spunblown.
  • one or both carrier layers can be a network (netting).
  • the network can have properties as they are in the EP 2 011 556 A1 which is hereby incorporated by reference.
  • Such carrier layers allow an advantageous stabilization of the meltblown layer arranged in between.
  • the nonwoven webs can have elastic properties. This leads to a further improvement in the fit.
  • the at least one fastening band can comprise or consist of a rubber-elastic material.
  • it can comprise or consist of an elastomer.
  • Fastening straps of this type enable the respiratory mask to be held securely with a high degree of adaptability to the shape of the face.
  • the respiratory masks described above can comprise two fastening straps.
  • One or more fastening straps can be designed in such a way that they can be guided around the back of the head of a wearer (user). Alternatively, one or more fastening straps can be designed in such a way that an ear of a wearer (user) can be guided.
  • the at least one fastening strap can be designed as a closed strap. This means that the corresponding fastening tape does not have a loose or open end. This can be achieved, for example, in that both ends of a fastening tape are connected to the filter part or a nonwoven web.
  • the corresponding band can be designed as such closed; it can therefore have a ring or loop shape.
  • the breathing mask can have at least two, in particular four, fastening straps with an open or loose end. This means that (only) one end of each fastening band is fastened to the filter part or a nonwoven web.
  • the open / loose ends of two fastening straps can be knotted.
  • the nonwoven webs can have at least one opening passing through the webs, through which the at least one fastening strap can be passed. This allows a simple attachment of a fastening tape to the filter part or the nonwoven webs.
  • the nonwoven webs can have two openings therethrough.
  • the two openings can be arranged on opposite sides or on opposite edges of the nonwoven webs.
  • the openings can each be arranged on one side of the non-welded edge.
  • they can be arranged at the ends of the unwelded edge. So they are on both sides of the opening of the respirator.
  • the openings can be slot-shaped, circular or oval.
  • the (long) diameter or the length of an opening can for example be between 2 mm and 10 mm.
  • a fastening band can be connected to the filter part or a nonwoven fabric web of the respiratory protection mask in that one end of the fastening tape is passed through an opening as described above through the nonwoven fabric webs and then knotted. This enables a wearer to fix a fastening tape to the nonwoven webs himself. If that Fastening tape is closed or annular, part of the fastening tape can be looped through the opening and then passed through the loop of the fastening tape remaining on the other side in order to fix the fastening tape to the nonwoven webs.
  • the at least one opening can be arranged in an area between the weld seam and the edge of the nonwoven webs.
  • the two nonwoven webs can be welded along the edge parallel to it, but with a certain distance.
  • the distance can be, for example, 2 to 9 mm.
  • the slots can be arranged in this area. This means that the protective or filtering area of the respirator remains intact.
  • the openings are located outside the area of the breathing mask that is delimited by the welding.
  • the at least one fastening tape can be welded to a nonwoven web. This represents an alternative, secure fixation of the fastening tape. If the at least one fastening tape on the (finished) respiratory protection mask has an open or loose end, only one end is welded to a nonwoven web. The other loose end can be tied to a loose end of another fastening tape. Alternatively, the other loose end can be passed through an opening extending through the two nonwoven webs - as described above.
  • both ends of a fastening tape can be welded to a nonwoven web.
  • the welded ends of a fastening tape can be arranged on opposite edges of the nonwoven webs, for example in the end regions of the non-welded edge.
  • the at least one fastening tape can be welded to both nonwoven webs.
  • the welded area of the fastening tape can be arranged between the two nonwoven webs. This represents a possibility of welding to both nonwoven webs. Such an arrangement allows simple manufacture and secure fixation.
  • the at least one fastening strap can be arranged completely between the nonwoven layers in the unused state (the respiratory protection mask).
  • the fastening tape is arranged completely between the nonwoven webs during the manufacture of the respiratory mask and is located completely between the nonwoven webs immediately after manufacture. This represents a further simplification of the manufacturing process
  • the two ends of the at least one fastening tape can be welded to the two nonwoven webs.
  • the at least one fastening tape can be as long as the non-welded edge of the superposed nonwoven webs.
  • the at least one fastening tape can also be longer than the non-welded edge of the nonwoven webs lying on top of one another. If there are several fastening straps, the respective option can be fulfilled equally for all fastening straps.
  • the at least one fastening tape can comprise or consist of a film and / or a nonwoven fabric.
  • the film or the nonwoven fabric can comprise or consist of a TPU material.
  • the nonwoven fabric can be a crimped nonwoven fabric.
  • Vistamaxx manufactured by ExxonMobil Chemical
  • One or both nonwoven webs can additionally have one or more weld lines structuring the material.
  • weld lines By such welding lines in a nonwoven web, predetermined kinks are provided. These can facilitate the deployment of the respirator and / or stabilize the three-dimensional shape during use.
  • the structuring weld lines can have a triangular shape.
  • a weld line can run from an end area of a non-welded edge (where the unwelded edge meets a welded edge) to the center of the (welded) edge opposite the non-welded edge.
  • Another weld line can run from the other (opposite) end region of the unwelded edge to the center of the opposite (welded) edge.
  • the two welding lines can meet there. This is advantageous, for example, in the case of a rectangular shape of the nonwoven fabric webs and / or the filter part, in particular in which the unwelded edge as well as the opposite welded edge form the long edges of the rectangle.
  • the respiratory masks described above can also have a side fold. Such a gusset increases the area that can be flowed through. This makes breathing easier.
  • the side fold can for example be arranged on the side opposite the non-welded edge. With a rectangular shape of the nonwoven webs and / or the filter part, the breathing mask can thus be given a duckbill shape.
  • the gusset can be turned inside the respirator. It can - in particular, but not only in the case of a rectangular shape of the nonwoven fabric webs - be turned in in the direction of the unwelded edge, that is to say the open side of the respiratory protection mask.
  • the side fold can be created by folding in areas of the two nonwoven webs that are opposite one another.
  • each fold leg can encompass an area of one of the two nonwoven webs.
  • the respiratory masks can be designed in such a way that each nonwoven web has a polygonal but not rectangular shape, the filter part, i.e. the nonwoven webs welded together, has a side fold and (in plan view) has a rectangular shape.
  • a gusset is formed from the polygonal, non-rectangular nonwoven webs in such a way that the resulting filter part has a rectangular shape.
  • An example of the formation of such a gusset is for a vacuum cleaner bag in the DE 20 2009 004 433 which is hereby incorporated by reference.
  • the respiratory masks described above can comprise a bendable nose bridge. This allows an optimization of the fit, in particular a better closure of the respirator in the eye and nose area, as well as an improved hold.
  • the nose bridge can be arranged parallel to the non-welded edge. It can be arranged on the outside of the breathing mask or embedded in one of the two nonwoven webs.
  • the nose bridge can comprise a single wire or a double wire.
  • the single or double wire can be embedded in a strip of a plastic material or a paper-based material.
  • the width of the nasal bridge can be 1 to 10 mm.
  • the length of the nasal bridge can be 2 cm to 25 cm, in particular more than 4 cm and / or less than 10 cm.
  • the nose bridge can also extend over the entire length of the non-welded edge. The latter allows a simplified production, since the nose bridge can be cut together with the nonwoven webs during production.
  • the nose bridge can be attached to one of the nonwoven webs in a non-destructively releasable or non-destructively releasable manner.
  • the nose bridge can be glued or glued to a nonwoven fabric be welded.
  • the attachment by means of adhesive can be done using a hotmelt.
  • the nose bridge can be connected to a nonwoven web continuously along its entire length or only at individual discrete points.
  • the respiratory masks described above can be designed as half masks. They thus cover the wearer's nose, mouth and chin when in use.
  • the respiratory masks described above can be designed as FFP-2 masks.
  • the invention further provides a system (kit-of-parts) comprising two superimposed webs of a nonwoven fabric, which are partially welded together along their edge, and at least one fastening tape provided for connection to the nonwoven webs and / or one provided for connection to the nonwoven webs Nasal bridge.
  • kit-of-parts comprising two superimposed webs of a nonwoven fabric, which are partially welded together along their edge, and at least one fastening tape provided for connection to the nonwoven webs and / or one provided for connection to the nonwoven webs Nasal bridge.
  • the nonwoven webs can have the described openings through which the at least one fastening tape can be passed.
  • a nose bridge can have a self-adhesive surface.
  • the self-adhesive surface can be covered with a film.
  • the nasal bridge is reusable. This allows an exchange of the filter part in the form of the welded nonwoven webs without having to exchange the nose bridge.
  • the nose bridge is already connected to a nonwoven web, that is to say the filter part.
  • the long edge can be in a range of 15 to 30 cm, in particular 20 to 28 cm.
  • the short edge can be in a range of 8 to 15 cm, in particular 11 to 14 cm.
  • Each nonwoven layer can have a weight per unit area (grammage) in a range from 10 to 70 g / m 3 , in particular 20 to 50 g / m 3 .
  • FIG. 11 shows a schematic plan view of a respiratory protection mask 1. It comprises two nonwoven webs 2 lying on top of one another, of which in FIG Figure 1 only the upper one can be seen.
  • Both nonwoven webs 2 have a rectangular shape and are precisely positioned on top of one another.
  • the filter part formed by the welded nonwoven webs as such also has a rectangular shape.
  • the two nonwoven webs 2 are partially welded to one another along their edge.
  • the ultrasonic weld seam 3 runs along three edges, namely the edges 4b, 4c and 4d.
  • the nonwoven webs are not welded to one another along the edge 4a.
  • the edge and thus the respirator is open. This is therefore also referred to as the open side of the respirator.
  • the seam 3 welded by means of ultrasound runs parallel to the three edges with a certain distance.
  • slot-shaped openings 5 are provided in the end regions of the unwelded or open edge 4a (where the edge 4a meets the edges 4b or 4d). The two openings pass through both nonwoven webs 2 and allow a fastening tape 6 to be fastened in each case.
  • the illustrated fastening straps 6 are designed to be closed or ring-shaped. In particular, they can each be guided around one ear of a wearer during use.
  • the fastening straps 6 consist of a rubber-elastic material, for example a rubber ring. This can either be passed through the respective slot with a loop-shaped part and then through the loop remaining on the first side again either when the respirator is being assembled by the manufacturer or later by the user , whereby a simple and reliable fixation of the fastening tape on the filter part of the respirator is achieved.
  • each fastening tape in the area where the slots 5 are located in the illustrated example can instead be glued or welded to the nonwoven material.
  • the fastening straps need not be closed straps either. Instead, they can each have an open end, so that fastening straps attached to the opposite sides (ends) of the open edge 4a can be knotted together on the back of the head of a wearer.
  • a fastening tape can also be non-destructively detachably connected to the nonwoven material on one side of the non-welded edge 4a (for example glued or welded);
  • an opening 5 can be provided on the other side of the open edge 4a, through which the open end of the fastening band can be guided to fix it.
  • the respiratory protection mask also has a nose bridge 7. This is arranged on the non-welded edge 4a, that is to say in the area of the opening of the filter part or the respiratory protection mask. It runs parallel to the edge 4a.
  • the nose bridge can in particular be a (bendable) wire embedded in a plastic material.
  • the nose bridge does not run over the entire length of the edge 4a. Alternatively, however, it could also extend over the entire length up to the edges 4b or 4d. In such a case, the nose bridge 7 can be cut together with the nonwoven webs during manufacture, which enables simplified manufacture.
  • the nose bridge 7 is non-destructively or non-destructively detachably connected to the nonwoven web 2.
  • a non-destructive connection consists, for example, in welding. This can either be continuous over the entire length of the nasal bridge or at individual discrete points. Alternatively, the nose bridge can be glued to the nonwoven web 2. For example, a hotmelt can be used for this, which typically also leads to a non-destructive connection.
  • the nose bridge is made available to the user as a separate element.
  • the nose bridge has a self-adhesive surface that is initially covered with a protective film. After removing the protective film, the user sticks the nasal bridge on the nonwoven fabric.
  • a nose bridge can also be reused for other respiratory protection filter parts.
  • Each nonwoven web 2 can be constructed in one or more layers.
  • a multilayer embodiment is shown schematically in FIG Figure 2 illustrated.
  • a three-layer nonwoven web 2 has a middle meltblown layer 8.
  • a carrier layer 9 is provided on both sides of the meltblown nonwoven fabric.
  • the carrier layer 9 can for example be a spunbond or spunblown nonwoven fabric.
  • Another alternative is a network (netting).
  • the grammage of the nonwoven webs 2 is in each case between 10 and 70 g / m 2 , in particular between 20 and 50 g / m 2 .
  • the three layers 8 and 9 can be connected to one another over the entire surface. This can be done, for example, by means of calendering. Alternatively, a connection using an adhesive (hotmelt) is also possible. Instead of a full-surface connection, the layers can also be connected to one another only circumferentially along their edge. An ultrasonic weld seam is particularly suitable for this.
  • Figure 3 shows a cross-sectional view through the filter part of a respiratory protection mask along the long edge 4a in the unused state after manufacture.
  • Two fastening straps 6 are arranged between the two nonwoven webs 2. With regard to the in Figure 1 illustrated configuration parallel and along the unsealed edge 4a. They are flush with the edge 4a.
  • the fastening tapes are connected to the respectively adjacent nonwoven web 2 and also to one another via the weld seam 3, which also connects the nonwoven webs 2 themselves. During production, the fastening tapes are placed between the nonwoven webs 2 and then welded together when the nonwoven webs 2 are welded.
  • the two fastening straps 6 are just as long as the edge 4a. As an alternative, they could also be made longer and then, for example, folded between the nonwoven webs.
  • the fastening straps 6 are pulled out between the nonwoven webs 2 and can be guided around the back of the wearer's head.
  • a nosepiece 7 can be applied to the nonwoven web 2 shown above.
  • Figure 4 shows in a schematic oblique view the filter part of the respiratory protection mask, that is to say the two nonwoven webs 2 connected to one another, in a slightly pulled apart state.
  • the edges 4a which are not welded to one another and through which the opening of the protective mask is formed, can be seen.
  • a side fold can be provided by turning in the nonwoven material.
  • FIG. 5 shows schematically the use of a breathing mask 1.
  • the breathing mask is on both sides, analogously to the case of FIG Figure 1 , loop-shaped or ring-shaped fastening straps 6 are provided, which are each guided around an ear of the wearer.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Pulmonology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP20168997.3A 2020-04-09 2020-04-09 Masque de protection respiratoire Withdrawn EP3892341A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20168997.3A EP3892341A1 (fr) 2020-04-09 2020-04-09 Masque de protection respiratoire
DE202020102102.8U DE202020102102U1 (de) 2020-04-09 2020-04-16 Atemschutzmaske

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20168997.3A EP3892341A1 (fr) 2020-04-09 2020-04-09 Masque de protection respiratoire

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Publication Number Publication Date
EP3892341A1 true EP3892341A1 (fr) 2021-10-13

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EP (1) EP3892341A1 (fr)
DE (1) DE202020102102U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115697498A (zh) * 2020-05-28 2023-02-03 欧罗菲利特斯控股公司 呼吸防护罩

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000013324A1 (it) * 2020-06-05 2021-12-05 Marco Cioli Kit per mascherine auto assemblanti
EP3954438A1 (fr) * 2020-08-12 2022-02-16 Eurofilters Holding N.V. Procédé de fabrication d'un masque de protection respiratoire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033403A1 (fr) * 1997-01-31 1998-08-06 Tecnol Medical Products, Inc. Produits jetables a emission de particules faible ou nulle pour utilisation en salle blanche
EP1990071A1 (fr) * 2006-03-01 2008-11-12 Makino, Chosei Masque multicouche
EP2011556A1 (fr) 2007-07-06 2009-01-07 Eurofilters Holding N.V Sac d'aspirateur
DE202009004433U1 (de) 2009-03-26 2009-06-04 Branofilter Gmbh Blockbodenbeutel mit zusätzlicher Schweißnaht und Sollfaltlinien

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033403A1 (fr) * 1997-01-31 1998-08-06 Tecnol Medical Products, Inc. Produits jetables a emission de particules faible ou nulle pour utilisation en salle blanche
EP1990071A1 (fr) * 2006-03-01 2008-11-12 Makino, Chosei Masque multicouche
EP2011556A1 (fr) 2007-07-06 2009-01-07 Eurofilters Holding N.V Sac d'aspirateur
DE202009004433U1 (de) 2009-03-26 2009-06-04 Branofilter Gmbh Blockbodenbeutel mit zusätzlicher Schweißnaht und Sollfaltlinien

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Title
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CN115697498A (zh) * 2020-05-28 2023-02-03 欧罗菲利特斯控股公司 呼吸防护罩

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