EP2457618B1 - Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique - Google Patents

Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique Download PDF

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Publication number
EP2457618B1
EP2457618B1 EP20100015037 EP10015037A EP2457618B1 EP 2457618 B1 EP2457618 B1 EP 2457618B1 EP 20100015037 EP20100015037 EP 20100015037 EP 10015037 A EP10015037 A EP 10015037A EP 2457618 B1 EP2457618 B1 EP 2457618B1
Authority
EP
European Patent Office
Prior art keywords
face mask
mask according
fibres
electrostatically charged
intermediate layer
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.)
Active
Application number
EP20100015037
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German (de)
English (en)
Other versions
EP2457618A1 (fr
Inventor
Jan Schultink
Ralf Dr. Sauer
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 NV
Original Assignee
Eurofilters NV
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Publication date
Application filed by Eurofilters NV filed Critical Eurofilters NV
Priority to ES10015037.4T priority Critical patent/ES2488124T3/es
Priority to EP20100015037 priority patent/EP2457618B1/fr
Priority to PCT/EP2011/005694 priority patent/WO2012069147A1/fr
Publication of EP2457618A1 publication Critical patent/EP2457618A1/fr
Application granted granted Critical
Publication of EP2457618B1 publication Critical patent/EP2457618B1/fr
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Classifications

    • 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 present invention relates to a face mask comprising a filter material having at least one intermediate layer between the inner layer and the outer layer.
  • the intermediate layer of electrostatically charged staple fibers and / or electrostatically charged filaments and / or formed from fiber networks, wherein on the fibers of the intermediate layer superficially a powdered absorbent material is applied.
  • Respiratory masks with a multilayer construction of nonwovens are known.
  • WO 2010/023370 a multilayer composite consisting of an outer layer of spunbonded fabric, a first felt-like intermediate layer of a triboelectrically charged fiber mixture, a second intermediate layer of electrostatically charged Melt-blown and an inner layer of spunbonded non-woven.
  • the US 2008/0110469 discloses a multilayer face mask wherein the layers of the filter material may consist of triboelectric fiber blends.
  • an intermediate layer of flexible activated carbon can be provided, which is laminated between two layers of fiber material.
  • a thin intermediate layer of "carbon-impregnated non-woven fiber" is provided.
  • the filtering layer may contain activated carbon or may be electrostatically charged.
  • the layers should be connected to each other at the outer edge of the mask.
  • the filtering layer may consist of meltblown or of electrostatically charged split fibers (Electrically charged fibrillated film fibers) or of glass fibers or fibers produced by electrospinning. It is described as advantageous to introduce absorbent particles, in particular activated carbon, in the filter layer.
  • the US 6,070,578 describes a facial mask for hunters in which the exhaled air is to be freed of odorants.
  • a fabric of activated carbon fibers (95-115 g / m 2 ) is arranged between two layers of a scrim.
  • the US 5,269,294 discloses an odor-reducing face mask in which a layer of a porous material is impregnated with an odor-absorbing agent.
  • the agent is a modified zeolite based molecular sieve.
  • the DE 101 52 785 A1 claims a face mask having an air-impermeable sheath and at least one filter layer disposed in the sheath and containing activated charcoal.
  • Activated carbon fibers are very powerful but also very expensive. Accordingly, woven carbon fiber fabrics are also very expensive and, because they are not weldable, make it difficult to inexpensively and simply package face masks.
  • the activated carbon particles are bonded together or with a porous support material. In doing so, the active area and thus the efficiency is lost. The lack of weldability of the activated carbon particles complicates the packaging as well as the activated carbon fibers.
  • a face mask which comprises a filter material comprising at least one face-facing layer and at least one outer layer, wherein at least the at least one interlayer contains or consists of electrostatically charged staple fibers and / or electrostatically charged filaments and / or fiber networks , wherein on the fibers of the intermediate layer superficially a powdered absorbent material is applied.
  • the invention is therefore characterized in particular by the fact that the intermediate layer consists of fibers or that it contains fibers in which a pulverulent absorption material is applied to electrostatically charged staple fibers and / or electrostatically charged filaments and / or fiber networks.
  • the intermediate layer consists of fibers or that it contains fibers in which a pulverulent absorption material is applied to electrostatically charged staple fibers and / or electrostatically charged filaments and / or fiber networks.
  • Such charge stabilizing additives which are usually the educts for the production the fibers are used, for example polypropylene, are known to those skilled in the art.
  • Preferred additives which act to stabilize charge are metal stearates, such as magnesium stearate.
  • the staple fibers and / or filaments may also form a triboelectric fiber blend.
  • the triboelectric charge can also be formed, for example, during the production of the middle layer by contact of two contacting fibers which have a different dielectric constant.
  • the fibers forming the at least one intermediate layer are charged electrostatically, so that a good adhesion of the powdered absorption material is achieved.
  • the absorption material is preferably applied in an amount of 1 to 50% by weight, preferably 7 to 25% by weight, based on the electrostatically charged staple fibers and / or filaments. It has been shown that by the amounts mentioned above, an almost complete occupancy of the fibers is achieved. Greater than 50% does not significantly improve odor adsorption, but smaller than 1% can not provide a positive odor adsorption effect.
  • hydrophobic zeolites, hydrophobic porous polymers and / or crystalline organometallic complexes and / or mixtures thereof are preferred in the invention as absorption materials, activated carbon being excluded as the absorption material.
  • Particularly preferred absorption materials are zeolites and / or porous polymers.
  • the zeolites is essential for the suitability that the micropores of zeolites have a sufficient size. Only above a diameter of> 5 ⁇ , the micropores are able to absorb and bind typical odor molecules. In addition, the zeolite must have a strongly hydrophobic (non-polar) character. Only from a ratio of SiO 2 / Al 2 O 3 > 200 (modulus) is a zeolite sufficiently nonpolar to bind the odor molecules. Particular preference is given to zeolites with a modulus> 300. The surface area exceeds 400 m 2 / g. The particle size of the zeolites used in the invention is 2 to 30 microns.
  • the total pore volume is above 0.2 m 3 / g, but it can also be used agglomerates of these particles. In this case, a higher total pore volume can be realized by the resulting macropores.
  • Such zeolites are accessible, for example, by dialyzing the types Y, 13C, ZSM5 and beta.
  • zeolites For the zeolites, the commercially available types DAY (Degussa) and TZB 9013 (Tricat) and DALY (Tricat) have proven to be well suited.
  • hydrophobic macroporous (macroreticular) polymers as absorption materials.
  • a typical representative of these hydrophobic polymers is the crosslinked SDVB (styrenedivinylbenzene). It is formed by copolymerization of styrene with divinylbenzene in the presence of so-called porogens (pore formers).
  • pore formers pore formers.
  • Preference is given to using hydrophobic variants having a surface area of> 600 g / m 2 and micropores of 6 to 20 ⁇ , and the highest possible proportion of mesopores (20 to 500 ⁇ ) and macropores (> 500 ⁇ ).
  • the average pore diameter is preferably between 3 and 300 ⁇ .
  • the particle size is between 1 and 500 ⁇ m. Preference is given to particles having a particle size of 1 to 200 ⁇ m.
  • the pore volume of such products is typically> 0.4 cm 3 / g.
  • Such macroporous hydrophobic polymers can be purchased from Rohm & Haas (Amberlite), Purolite (Makronet), Dow Chemicals (Optipore), Mitsubishi Chemical Company (Sepabeads), and Bayer (IONAC).
  • a coating of the charged fibers with porous crystalline organometallic complexes such as "MOF-177". This adsorbent realizes an extremely high surface area (4500 m 2 / g) with sufficiently large micropores (10 ⁇ ). These crystals are described in Nature, Vol. 427, pp. 253-527, February 2004 , Reference is made to the disclosure of this document.
  • the fibers of the intermediate layer used according to the invention which are provided with the absorbent material as described above, are preferably chemical fibers.
  • the synthetic fibers are synthetic fibers. Examples of synthetic fibers are fibers of polyolefins, polyesters, polyamides, polyacrylmethyl and / or polyvinyl alcohol.
  • the fibers are branched, crimped, hollow and / or textured and / or a non-circular Have cross-section (eg, trilobal) cross-section. From the dimensions forth, it is advantageous if the fibers have an average length between 0.3 and 100 mm, preferably between 0.5 and 70 mm.
  • the synthetic fibers can also be antibacterial. This can be done by adding antibacterial substances already during production. The advantage of these fibers is that the antibacterial substances are practically not released and no reduction of the antibacterial effect occurs.
  • Such fibers are available from Rhovyl in F-55310 Tronville en Barrois, e.g. the fibers Rhovyl'AS + ®, or Japan Exlan Co. Ltd., Tokyo, as well as Sterling Fibers Inc., 5005 Sterling Way, Pace, Fla, under the brand names "biofresh” and DAK Americas, 5925 Carnegie Blvd., Charlotte, NC 28209.
  • the at least one intermediate layer of the face mask according to the invention preferably consists of split fibers or triboelectric staple fiber mixture. It is also possible to form the middle layer from a loaded fine fiber spunbond layers (melt-blown).
  • the split fibers can also be present as a nonwoven fabric layer, wherein the nonwoven fabric layer can also be needled.
  • a fiber network is also suitable. A fiber network in the context of the invention arises when profiled films are split.
  • the invention is subject to no restrictions with regard to the at least one intermediate layer. It is preferred if the inner Layer and the outer layer are independently selected from the group consisting of nonwoven fabric layers, such as fine fiber spunbonded layers (melt-blown) or spunbonded fabric, and / or tissue.
  • nonwoven fabric layers such as fine fiber spunbonded layers (melt-blown) or spunbonded fabric, and / or tissue.
  • the inner and outer layers can be made of nonwoven fabric layers or melt-blown.
  • the two layers can be replaced by a tissue.
  • the face mask according to the invention comprises at least three layers, wherein in a three-layer structure, the intermediate layer is the middle layer.
  • the layers may, for example, be welded together at the edge of the filter material so that the at least three layers of the filter material are present unconnected to one another over the entire surface of the filter material.
  • the layers are connected by point calendering.
  • the at least three layers are interconnected by welded joints, with the proviso that, based on the total flow-through surface of the filter material, an average of a maximum of 19, preferably a maximum of 10, more preferably a maximum of 5 welded joints per 10 cm 2 are present.
  • the entire flow-through surface of the filter bag has an average of at most 19 welds per 10 cm 2 and the pressing surface portion of the weld pattern is a maximum of 2%, preferably at most 1%.
  • welds are formed so that they are distributed over the surface of the filter material, it is possible that the welds are star-shaped, punctiform, bar-shaped and / or linear.

Claims (15)

  1. Masque facial, contenant un matériau filtrant, qui comprend au moins une couche intérieure dirigée vers le visage et au moins une couche extérieure, ainsi qu'au moins une couche intermédiaire, la ou les couches intermédiaires contenant des fibres discontinues électrostatiquement chargées et/ou des filaments électrostatiquement chargés et/ou des réseaux de fibres électrostatiquement chargés, ou en sont constituées, caractérisé en ce qu'un matériau absorbant pulvérulent est appliqué superficiellement sur les fibres électrostatiquement chargées de la couche intermédiaire.
  2. Masque facial selon la revendication 1, caractérisé en ce que les fibres de la couche intermédiaire contiennent des additifs assurant la stabilisation de la charge.
  3. Masque facial selon la revendication 1 ou 2, caractérisé en ce que les fibres de la couche intermédiaire présentent une charge triboélectrique.
  4. Masque facial selon l'une des revendications précédentes, caractérisé en ce que les fibres discontinues électrostatiquement chargées sont lisses, ramifiées, rétrécies, creuses et/ou texturées, ou présentent une section transversale non circulaire, en particulier une section transversale trilobée.
  5. Masque facial selon l'une des revendications 1 à 4, caractérisé en ce que le matériau absorbant est appliqué en une quantité de 1 à 50 % en poids, de préférence de 7 à 25 % en poids, rapportée aux fibres discontinues et/ou aux filaments électrostatiquement chargés.
  6. Masque facial selon l'une des revendications précédentes, caractérisé en ce que le matériau absorbant est choisi parmi les zéolites hydrophobes, les polymères hydrophobes poreux et/ou les complexes organométalliques cristallins et/ou les mélanges de ceux-ci, le charbon actif étant exclu en tant que matériau absorbant.
  7. Masque facial selon la revendication précédente, caractérisé en ce que les zéolites présentent
    a) des micropores ayant une grosseur de pore > 5 Å, de préférence > 6,5 Å, et/ou
    b) une aire spécifique > 400 m2/g, et/ou
    c) un module > 200, de préférence > 300, et/ou
    d) une taille de particules comprise dans la plage de 2 à 30 µm.
  8. Masque facial selon la revendication 6, caractérisé en ce que les polymères poreux présentent
    a) des micropores de 6 à 20 Å, des mésopores de 20 à 500 Å et des macropores > 500 Å, et/ou
    b) un diamètre moyen des pores compris entre 3 et 300 Å, et/ou
    c) une taille de particules comprise dans la plage de 1 à 500 µm, de préférence de 1 à 200 µm, et/ou
    d) un volume des pores ≥ 0,4 cm3/g, et/ou
    e) sont hydrophobes.
  9. Masque facial selon l'une des revendications 6 ou 8, caractérisé en ce que les polymères poreux sont constitués de polystyrène, de poly(acide acrylique) et/ou de leurs dérivés.
  10. Masque facial selon l'une des revendications précédentes, caractérisé en ce que la ou les couches intermédiaires sont constituées de fibres refendues ou de fibres discontinues triboélectriques, ou se présentent sous forme d'un non-tissé filamentaire chargé.
  11. Masque facial selon la revendication 10, caractérisé en ce que les fibres refendues se présentent sous forme d'une couche d'un non-tissé fibreux, qui peut aussi être aiguilleté.
  12. Masque facial selon l'une des revendications précédentes, caractérisé en ce que la couche intérieure et la couche extérieure sont indépendamment l'une de l'autre choisies dans le groupe consistant en les couches de non-tissés, tels que par exemple les nappes de non-tissés à fibres fines (melt-blown) ou les non-tissés et/ou les tissus.
  13. Masque facial selon l'une des revendications précédentes, caractérisé en ce que les couches sont assemblées l'une à l'autre par des liaisons soudées, du moment que, par rapport à l'aire totale du matériau filtrant pénétrables, on a en moyenne au maximum 19, de préférence au maximum 10, d'une manière particulièrement préférée au maximum 5 liaisons soudées par 10 cm2.
  14. Masque facial selon la revendication précédente, caractérisé en ce que l'aire pénétrable totale de la poche de filtration comprend en moyenne au maximum 19 liaisons soudées par 10 cm2, et que la proportion que représente l'aire d'appui du modèle de soudage est au maximum de 2 %, de préférence au maximum de 1 %.
  15. Masque facial selon l'une des revendications précédentes, caractérisé en ce que les couches sont assemblées l'une à l'autre sur leurs bords.
EP20100015037 2010-11-26 2010-11-26 Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique Active EP2457618B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES10015037.4T ES2488124T3 (es) 2010-11-26 2010-11-26 Mascarilla facial con material de absorción en polvo aplicado a fibras cortadas cargadas electrostáticamente
EP20100015037 EP2457618B1 (fr) 2010-11-26 2010-11-26 Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique
PCT/EP2011/005694 WO2012069147A1 (fr) 2010-11-26 2011-11-11 Masque facial à matériau absorbant pulvérulent déposé sur des fibres discontinues chargées électrostatiquement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100015037 EP2457618B1 (fr) 2010-11-26 2010-11-26 Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique

Publications (2)

Publication Number Publication Date
EP2457618A1 EP2457618A1 (fr) 2012-05-30
EP2457618B1 true EP2457618B1 (fr) 2014-06-18

Family

ID=43927837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100015037 Active EP2457618B1 (fr) 2010-11-26 2010-11-26 Masque de visage doté de matériaux d'absorption sous forme de poudre appliquée sur des fibres empilées chargées de manière électrostatique

Country Status (3)

Country Link
EP (1) EP2457618B1 (fr)
ES (1) ES2488124T3 (fr)
WO (1) WO2012069147A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ712238A (en) * 2013-03-15 2017-12-22 Crosstex Int Inc A facemask having one or more nanofiber layers
CN113073425B (zh) * 2021-04-02 2022-07-26 海南赛诺实业有限公司 一种用于kn95口罩的熔喷布及其制备方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4115404A1 (de) * 1991-05-10 1992-11-12 Mgf Gutsche & Co Gmbh Betriebs Verfahren zum herstellen eines filtermediums und danach hergestelltes filtermedium
US5269294A (en) 1992-05-26 1993-12-14 Wallace J. Rogozinski Face mask impregnated with odor reducing molecular sieve material
GB2280620A (en) 1993-08-06 1995-02-08 Minnesota Mining & Mfg Face mask
US6070578A (en) 1998-02-23 2000-06-06 Baughman; David A. Breath odor eliminator mask
DE10152785A1 (de) 2001-04-24 2002-11-07 Ulrich Lersch Atemluftfilter
CN2635131Y (zh) 2003-04-23 2004-08-25 郑会武 新型强力吸附型口罩
CN2635132Y (zh) 2003-04-23 2004-08-25 郑会武 吸附型纳米口罩
CN2635130Y (zh) 2003-08-04 2004-08-25 李一鸣 高防护口罩
US20080110469A1 (en) 2006-11-13 2008-05-15 Stanley Weinberg Strapless flexible tribo-charged respiratory facial mask and method
CN200995002Y (zh) 2007-02-04 2007-12-26 李桂峰 卫生防护口罩
CN201020171Y (zh) 2007-04-19 2008-02-13 北京京棉纺织集团有限责任公司 保健口罩
CN101317703A (zh) 2008-07-08 2008-12-10 江南大学 空气滤清口罩
FR2935272B1 (fr) 2008-08-26 2010-09-03 Deltalyo & Valmy Composition multicouche pour masque respiratoire

Also Published As

Publication number Publication date
ES2488124T3 (es) 2014-08-26
WO2012069147A1 (fr) 2012-05-31
EP2457618A1 (fr) 2012-05-30

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