EP2457618A1 - Face mask with powder absorption material attached to electrostatically charged stapled fibres - Google Patents

Face mask with powder absorption material attached to electrostatically charged stapled fibres Download PDF

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Publication number
EP2457618A1
EP2457618A1 EP10015037A EP10015037A EP2457618A1 EP 2457618 A1 EP2457618 A1 EP 2457618A1 EP 10015037 A EP10015037 A EP 10015037A EP 10015037 A EP10015037 A EP 10015037A EP 2457618 A1 EP2457618 A1 EP 2457618A1
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EP
European Patent Office
Prior art keywords
face mask
mask according
fibers
electrostatically charged
intermediate layer
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EP10015037A
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German (de)
French (fr)
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EP2457618B1 (en
Inventor
Jan Schultink
Ralf Dr. Sauer
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Eurofilters NV
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Eurofilters NV
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Priority to ES10015037.4T priority Critical patent/ES2488124T3/en
Priority to EP20100015037 priority patent/EP2457618B1/en
Priority to PCT/EP2011/005694 priority patent/WO2012069147A1/en
Publication of EP2457618A1 publication Critical patent/EP2457618A1/en
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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 as absorption materials in the invention, 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 ā‡ , 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 ā‡ , and the highest possible proportion of mesopores (20 to 500 ā‡ ) and macropores (> 500 ā‡ ).
  • the average pore diameter is preferably between 3 and 300 ā‡ .
  • the particle size is between 1 and 500 ā‡ m. Preference is given to particles having a particle size of 1 to 200 ā‡ 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 ā‡ ). 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 + Ā®, or Japan Exlan Co. Ltd., Tokyo, as well as Sterling Fibers Inc., 5005 Sterling Way, Pace, Fla, under the brand names "biofreshā€ 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 at most 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.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The face mask has a filter material that is provided with an inner layer, an outer layer and an intermediate layer. The intermediate layer has electrostatically charged staple fibers or electrostatically charged filaments or electrostatically charged fiber-networks. A powdery absorption material is applied on the electrostatically charged fibers of the intermediate layer. The absorption material is selected from hydrophobic zeolites hydrophobic porous polymers or crystalline metal-organic complexes, where activated carbon is provided.

Description

Die vorliegende Erfindung betrifft eine Gesichtsmaske, die ein Filtermaterial umfasst, das zwischen der inneren Lage und der ƤuƟeren Lage mindestens eine Zwischenlage aufweist. Hierbei ist die Zwischenlage aus elektrostatisch geladenen Stapelfasern und/oder elektrostatisch geladenen Filamenten und/oder aus Faser-Netzwerken gebildet, wobei auf die Fasern der Zwischenlage oberflƤchlich ein pulverfƶrmiges Absorptionsmaterial aufgebracht ist.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. Here, 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.

Atemmasken mit einem mehrlagigen Aufbau aus Vliesstoffen sind bekannt.Respiratory masks with a multilayer construction of nonwovens are known.

So offenbart die WO 2010/023370 einen mehrlagigen Verbund bestehend aus einer AuƟenlage aus Spinnvlies, einer ersten filzartigen Zwischenlage aus einer triboelektrisch geladenen Fasermischung, einer zweiten Zwischenlage aus elektrostatisch geladenem Melt-blown und einer Innenlage aus Spinnvlies.So revealed the 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.

Ebenfalls bekannt sind Atemmasken mit einem mehrlagigen Aufbau aus Vliesstoffen und einer geruchsabsorbierenden Schicht.Also known are respiratory masks with a multilayer construction of nonwovens and an odor-absorbing layer.

Die US 2008/0110469 offenbart eine mehrlagige Gesichtsmaske, wobei die Lagen des Filtermaterials aus triboelektrischen Fasermischungen bestehen kƶnnen. Optional kann eine Zwischenlage aus flexibler Aktivkohle vorgesehen sein, die zwischen zwei Lagen aus Fasermaterial laminiert ist. Als weitere Option ist eine dĆ¼nne Zwischenlage aus mit "Kohle imprƤgnierter Vliesfaser" vorgesehen.The US 2008/0110469 discloses a multilayer face mask wherein the layers of the filter material may consist of triboelectric fiber blends. Optionally, an intermediate layer of flexible activated carbon can be provided, which is laminated between two layers of fiber material. As a further option, a thin intermediate layer of "carbon-impregnated non-woven fiber" is provided.

Auch in der GB 2 280 620 wird beschrieben, dass eine filternde Lage vorhanden ist, die Aktivkohle enthalten kann oder elektrostatisch geladen sein kann. Die Lagen sollen am ƤuƟeren Rand der Maske miteinander verbunden sein. Die filternde Lage kann aus Meltblown oder aus elektrostatisch geladenen Split-Fasern (Electrically charged fibrillated film fibres) oder auch aus Glasfaser oder durch Elektrospinnen hergestellten Fasern bestehen. Es wird als vorteilhaft beschrieben, absorbierende Partikel, insbesondere Aktivkohle, in die Filterlage einzubringen.Also in the GB 2 280 620 It is described that there is a filtering layer which 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.

Die US 6,070,578 beschreibt eine Gesichtsmaske fĆ¼r JƤger, bei der die ausgeatmete Luft von Geruchsstoffen befreit werden soll. Dazu wird ein Gewebe aus Aktivkohlefasern (95-115 g/m2) zwischen zwei Lagen eines Gitterstoffes angeordnet.The US 6,070,578 describes a facial mask for hunters in which the exhaled air is to be freed of odorants. For this purpose, a fabric of activated carbon fibers (95-115 g / m 2 ) is arranged between two layers of a scrim.

Die US 5,269,294 offenbart eine geruchsreduzierende Gesichtsmaske, bei der eine Lage eines porƶsen Materials mit einem geruchsabsorbierenden Mittel imprƤgniert ist. Bei dem Mittel handelt es sich um ein modifiziertes Molekularsieb auf Zeolithbasis.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.

Die DE 101 52 785 A1 beansprucht eine Gesichtsmaske mit einer luftduchlƤssigen HĆ¼lle und wenigstens einer Filterlage, die in der HĆ¼lle angeordnet ist und Aktivkohle enthƤlt.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.

Weitere Gesichtsmasken mit Aktivkohleschichten offenbaren CN 101317703 , CN 201020171 , CN 200995002 , CN 2635130 , CN 2635132 und CN 2635131 .Reveal more face masks with activated charcoal layers CN 101317703 . CN 201020171 . CN 200995002 . CN 2635130 . CN 2635132 and CN 2635131 ,

Aktivkohlefasern sind sehr leistungsfƤhig aber auch sehr teuer. Gewebe aus Aktivkohlefasern sind dementsprechend ebenfalls Ć¼beraus teuer und erschweren, da sie nicht schweiƟbar sind, die kostengĆ¼nstige und einfache Konfektionierung von Gesichtsmasken. Bei Filterschichten, die Aktivkohle in Kugel- oder Bruchform enthalten, werden die Aktivkohleteilchen miteinander oder mit einem porƶsen TrƤgermaterial verklebt. Dabei geht die aktive FlƤche und damit die LeistungsfƤhigkeit verloren. Die fehlende SchweiƟbarkeit der Aktivkohlepartikel erschwert die Konfektionierung genauso wie bei den Aktivkohlefasern.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. In filter layers containing activated carbon in spherical or fracture form, 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.

Daher ist es Aufgabe der vorliegenden Erfindung, ein Material fĆ¼r Gesichtsmasken bzw. Gesichtsmasken als solche bereitzustellen, das neben einer guten Partikelabscheidung auch eine leistungsfƤhige Geruchsfiltration bietet und trotzdem einfach und preiswert konfektioniert werden kann.It is therefore an object of the present invention to provide a material for face masks or face masks as such, which offers not only a good particle separation but also a powerful odor filtration and yet can be assembled easily and inexpensively.

Diese Aufgabe wird bezĆ¼glich der Gesichtsmaske mit den Merkmalen des Patentanspruchs 1 gelƶst. Die jeweiligen abhƤngigen PatentansprĆ¼che stellen dabei vorteilhafte Weiterbildungen dar.This object is achieved with respect to the face mask with the features of claim 1. The respective dependent claims are advantageous developments.

ErfindungsgemƤƟ wird eine Gesichtsmaske bereitgestellt, die ein Filtermaterial enthƤlt, das mindestens eine dem Gesicht zugewandte Lage und mindestens eine ƤuƟere Lage umfasst, wobei zumindest die mindestens eine Zwischenlage elektrostatisch geladene Stapelfasern und/oder elektrostatisch geladene Filamente und/oder Faser-Netzwerke enthƤlt oder daraus besteht, wobei auf die Fasern der Zwischenlage oberflƤchlich ein pulverfƶrmiges Absorptionsmaterial aufgebracht ist.According to the invention, a face mask is provided 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.

Die Erfindung zeichnet sich somit besonders dadurch aus, dass die Zwischenlage aus Fasern besteht bzw. dass sie Fasern enthƤlt, bei denen ein pulverfƶrmiges Absorptionsmaterial an elektrostatisch geladenen Stapelfasern und/oder elektrostatisch geladenen Filamenten und/oder Faser-Netzwerke aufgebracht ist. Durch diese MaƟnahme kann nun erreicht werden, dass nicht nur eine gute Partikelabscheidung, sondern gleichzeitig auch noch eine leistungsfƤhige Geruchsfiltration gewƤhrleistet ist. Dadurch, dass pulverfƶrmige Absorptionsmaterialien auf der OberflƤche der Fasern aufgebracht sind, wird eine groƟe freie OberflƤche der Absorptionsmaterialien erreicht. Gleichzeitig ist durch die Fasern, die elektrostatisch geladen sind, eine sichere Anhaftung der Absorptionsmaterialien auch Ć¼ber eine lƤngere Gebrauchsdauer gewƤhrleistet. Die geladenen Stapelfasern und/oder Filamente kƶnnen selbstverstƤndlich auch noch ladungsstabilisierende ZusƤtze enthalten. Derartige ladungsstabilisierende ZusƤtze, die Ć¼blicherweise den Edukten, die zur Herstellung der Fasern eingesetzt werden, z.B. Polypropylen, zugesetzt werden, sind dem Fachmann bekannt. Bevorzugte ZusƤtze, die ladungsstabilisierend wirken, sind Metallstearate, wie z.B. Magnesiumstearat. Die Stapelfasern und/oder Filamente kƶnnen auch eine triboelektrische Fasermischung bilden. Die triboelektrische Ladung kann sich z.B. auch bei der Herstellung der mittleren Lage durch Kontakt von zwei sich berĆ¼hrenden Fasern, die eine verschiedene DielektrizitƤtszahl aufweisen, bilden.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. By this measure can now be achieved that not only a good particle separation, but at the same time also a powerful odor filtration is guaranteed. The fact that powdered absorbent materials are applied to the surface of the fibers, a large free surface of the absorbent materials is achieved. At the same time, the fibers, which are electrostatically charged, ensure reliable adhesion of the absorption materials over a longer service life. Of course, the charged staple fibers and / or filaments may also contain charge-stabilizing additives. 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.

Wesentlich bei der vorliegenden Erfindung ist, dass die die mindestens eine Zwischenlage bildenden Fasern elektrostatisch geladen sind, so dass eine gute Anhaftung des pulverfƶrmigen Absorptionsmaterials erreicht wird.It is essential in the present invention that the fibers forming the at least one intermediate layer are charged electrostatically, so that a good adhesion of the powdered absorption material is achieved.

Bevorzugt ist das Absorptionsmaterial in einer Menge von 1 bis 50 Gew.-%, bevorzugt 7 bis 25 Gew.-%, bezogen auf die elektrostatisch geladenen Stapelfasern und/oder Filamente, aufgebracht. Es hat sich gezeigt, dass durch die vorstehend genannten Mengen eine nahezu vollstƤndige Belegung der Fasern erreicht wird. GrĆ¶ĆŸere Mengen als 50 % ergeben keine wesentliche weitere Verbesserung in Bezug auf die Geruchsadsorption, kleinere Mengen als 1 % kƶnnen andererseits keinen positiven Effekt bei der Geruchsadsorption ermƶglichen.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.

Von der stofflichen Seite her sind bei der Erfindung als Absorptionsmaterialien hydrophobe Zeolithe, hydrophobe porƶse Polymere und/oder kristalline metallorganische Komplexe und/oder Mischungen hiervon bevorzugt, wobei als Absorptionsmaterial Aktivkohle ausgeschlossen ist.From the material side, hydrophobic zeolites, hydrophobic porous polymers and / or crystalline organometallic complexes and / or mixtures thereof are preferred as absorption materials in the invention, activated carbon being excluded as the absorption material.

Besonders bevorzugte Absorptionsmaterialien sind dabei Zeolithe und/oder porƶse Polymere.Particularly preferred absorption materials are zeolites and / or porous polymers.

Bei den Zeolithen ist dabei wesentlich fĆ¼r die Eignung, dass die Mikroporen der Zeolithe eine ausreichende GrĆ¶ĆŸe haben. Erst oberhalb eines Durchmessers von > 5 ƅ sind die Mikroporen in der Lage, typische GeruchsmolekĆ¼le aufzunehmen und zu binden. ZusƤtzlich muss der Zeolith einen stark hydrophoben (unpolaren) Charakter haben. Erst ab einem VerhƤltnis von SiO2/Al2O3 > 200 (Modul) ist ein Zeolith ausreichend unpolar, um die GeruchsmolekĆ¼le zu binden. Besonders bevorzugt sind Zeolithe mit einem Modul > 300. Die OberflƤche Ć¼berschreitet 400 m2/g. Die PartikelgrĆ¶ĆŸe der erfindungsgemƤƟ verwendeten Zeolithe liegt bei 2 bis 30 Āµm. Das Gesamtporenvolumen liegt Ć¼ber 0,2 m3/g, es sind aber auch Agglomerate dieser Partikel einsetzbar. In diesem Fall ist auch ein hƶheres Gesamtporenvolumen durch die entstehenden Makroporen realisierbar. Solche Zeolithe sind beispielsweise durch Dialuminieren der Typen Y, 13C, ZSM5 und Beta zugƤnglich.In the zeolites is essential for the suitability that the micropores of zeolites have a sufficient size. Only above a diameter of> 5 ƅ, 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.

Neben den Zeolithen sind auch Bentonite, insbesondere "Fullers Erde" geeignet.In addition to the zeolites and bentonites, in particular "Fuller earth" are suitable.

Bei den Zeolithen haben sich die kƤuflichen Typen DAY (Degussa) sowie TZB 9013 (Tricat) und DALY (Tricat) als gut geeignet erwiesen.For the zeolites, the commercially available types DAY (Degussa) and TZB 9013 (Tricat) and DALY (Tricat) have proven to be well suited.

ErfindungsgemƤƟ wird weiter vorgeschlagen, als Absorptionsmaterialien hydrophobe makroporƶse (makroreticular) Polymere zu verwenden. Ein typischer Vertreter dieser hydrophoben Polymere ist das vernetzte SDVB (Styroldivinylbenzol). Es entsteht durch Copolymerisation von Styrol mit Divinylbenzol in Gegenwart von sog. Porogenen (Porenbildnern). Bevorzugt werden hydrophobe Varianten mit einer OberflƤche von > 600 g/m2 und Mikroporen von 6 bis 20 ƅ, sowie einem mƶglichst hohen Anteil Mesoporen (20 bis 500 ƅ) und Makroporen (> 500 ƅ) verwendet. Der durchschnittliche Porendurchmesser liegt bevorzugt zwischen 3 und 300 ƅ.According to the invention, it is further proposed to use 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). Preference is given to using hydrophobic variants having a surface area of> 600 g / m 2 and micropores of 6 to 20 ƅ, and the highest possible proportion of mesopores (20 to 500 ƅ) and macropores (> 500 ƅ). The average pore diameter is preferably between 3 and 300 ƅ.

Vorteilhafterweise liegt dabei die PartikelgrĆ¶ĆŸe zwischen 1 bis 500 Āµm. Bevorzugt sind Partikel mit einer PartikelgrĆ¶ĆŸe von 1 bis 200 Āµm. Das Porenvolumen solcher Produkte ist typischerweise > 0,4 cm3/g. KƤuflich erworben werden kƶnnen solche makroporƶsen hydrophoben Polymere bei Rohm & Haas (Amberlite), Purolite (Makronet), Dow Chemicals (Optipore), Mitsubishi Chemical Company (Sepabeads) und Bayer (IONAC). Geeignet ist auch eine Beschichtung der geladenen Fasern mit porƶsen kristallinen metallorganischen Komplexen, wie z.B. "MOF-177". Dieses Adsorbens realisiert eine extrem hohe OberflƤche (4500 m2/g) bei ausreichend groƟen Mikroporen (10 ƅ). Diese Kristalle sind beschrieben in Nature, Band 427, S. 253-527, Februar 2004 . Auf den Offenbarungsgehalt dieses Dokumentes wird Bezug genommen.Advantageously, the particle size is between 1 and 500 Ī¼m. Preference is given to particles having a particle size of 1 to 200 Ī¼m. 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). Also suitable is 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 ƅ). These crystals are described in Nature, Vol. 427, pp. 253-527, February 2004 , Reference is made to the disclosure of this document.

Die erfindungsgemƤƟ eingesetzten Fasern der Zwischenlage, die mit dem Absorptionsmaterial wie vorstehend beschrieben versehen sind, sind bevorzugt Chemiefasern. Bei den Chemiefasern sind synthetische Fasern, zu nennen. Beispiele fĆ¼r synthetische Fasern sind Fasern aus Polyolefinen, Polyestern, Polyamiden, Polyacrylmethyl und/oder Polyvinylalkohol.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.

Es hat sich weiterhin gezeigt, dass es bei den Fasern bevorzugt ist, wenn diese verzweigt, gekrimpt, hohl und/oder texturiert sind und/oder einen nicht kreisfƶrmigen Querschnitt (z.B. trilobalen) Querschnitt aufweisen. Von den Abmessungen her ist es gĆ¼nstig, wenn die Fasern eine mittlere LƤnge zwischen 0,3 und 100 mm, bevorzugt zwischen 0,5 und 70 mm aufweisen.It has also been found that it is preferred for the fibers if they 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.

Die synthetischen Fasern kƶnnen auch antibakteriell ausgerĆ¼stet sein. Dies kann dadurch erfolgen, dass bereits bei der Herstellung antibakterielle Stoffe zugesetzt werden. Der Vorteil dieser Fasern besteht darin, dass die antibakteriellen Stoffe praktisch nicht freigesetzt werden und keine Minderung der antibakteriellen Wirkung eintritt. Solche Fasern sind erhƤltlich bei Rhovyl in F-55310 Tronville en Barrois, z.B. die Fasern Rhovyl'A.S.+Ā®, oder bei Japan Exlan Co. Ltd., Tokyo sowie bei Sterling Fibers Inc., 5005 Sterling Way, Pace, Fla, unter dem Markennamen "biofresh" und DAK Americas, 5925 Carnegie Blvd., Charlotte, NC 28209.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 + Ā®, 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.

SelbstverstƤndlich ist es auch mƶglich, die Fasern nachtrƤglich antibakteriell auszurĆ¼sten.Of course, it is also possible to subsequently equip the fibers antibacterial.

Die mindestens eine Zwischenlage der Gesichtsmaske nach der Erfindung besteht dabei bevorzugt aus Split-Fasern oder triboelektrischen Stapelfasermischung. Auch ist es mƶglich, die mittlere Lage aus einem geladenem Feinfaserspinnvlieslagen (Melt-blown) zu bilden. Die Split-Fasern kƶnnen dabei auch als Faservlieslage vorliegen, wobei die Faservlieslage auch vernadelt sein kann. Auch ein Faser-Netzwerk ist geeignet. Ein Faser-Netzwerk im Sinne der Erfindung entsteht, wenn profilierte Folien gespalten werden.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.

Vom Aufbau her unterliegt dabei die Erfindung in Bezug auf die mindestens eine Zwischenschicht keinerlei EinschrƤnkungen. Bevorzugt ist es dabei, wenn die innere Lage und die ƤuƟere Lage unabhƤngig voneinander ausgewƤhlt sind aus der Gruppe bestehend aus Vliesstofflagen, wie z.B. Feinfaserspinnvlieslagen (Melt-blown) oder Spinnvlies, und/oder Gewebe.In terms of construction, 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.

GemƤƟ dieser AusfĆ¼hrungsform ist es beispielsweise mƶglich, dass die inneren und ƤuƟeren Lagen aus Vliesstofflagen oder Melt-blown bestehen. Ebenso ist es jedoch auch mƶglich, dass nur eine der beiden Lagen eine Vliesstofflage ist, wƤhrend die andere eine Melt-blown ist. Auch kann eine der beiden Lagen durch ein Gewebe ersetzt sein.For example, according to this embodiment, it is possible for the inner and outer layers to be made of nonwoven fabric layers or melt-blown. However, it is also possible that only one of the two layers is a nonwoven layer, while the other is a melt-blown. Also, one of the two layers can be replaced by a tissue.

Ebenso ist jedoch auch die Mƶglichkeit umfasst, dass auf die innere Lage und die ƤuƟeren Lage noch eine weitere Lage und/oder mehrere Lagen aus Vliesstofflagen wie Melt-blown angeordnet sind. Die Gesichtsmaske nach der Erfindung umfasst aber mindestens drei Lagen, wobei bei einem Dreilagenaufbau die Zwischenlage die mittlere Lage ist.Likewise, however, also includes the possibility that on the inner layer and the outer layer yet another layer and / or multiple layers of nonwoven fabric layers such as melt-blown are arranged. However, 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.

Die Lagen kƶnnen beispielsweise am Rand des Filtermaterials miteinander verschweiƟt sein, so dass die mindestens drei Lagen des Filtermaterials Ć¼ber die gesamte FlƤche des Filtermaterials unverbunden miteinander vorliegen.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.

Bevorzugt ist jedoch, wenn die Lagen durch Punktkalandrieren verbunden sind. In einer besonders bevorzugten AusfĆ¼hrungsform sind die mindestens drei Lagen durch SchweiƟverbindungen untereinander verbunden, mit der MaƟgabe dass, bezogen auf die gesamte durchstrƶmbare FlƤche des Filtermaterials, durchschnittlich maximal 19, bevorzugt maximal 10, besonders bevorzugt maximal 5 SchweiƟverbindungen pro 10 cm2 vorhanden sind.However, it is preferred if the layers are connected by point calendering. In a particularly preferred embodiment, 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.

Weiter ist es mƶglich, dass die gesamte durchstrƶmbare FlƤche des Filterbeutels durchschnittlich maximal 19 SchweiƟverbindungen pro 10 cm2 aufweist und der PressflƤchenanteil des SchweiƟmusters maximal 2 %, bevorzugt maximal 1 %, betrƤgt.Further, it is possible that 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 at most 2%, preferably at most 1%.

FĆ¼r den Fall, dass die SchweiƟverbindungen so ausgebildet sind, dass sie verteilt Ć¼ber die FlƤche des Filtermaterials vorliegen, ist es mƶglich, dass die SchweiƟpunkte sternfƶrmig, punktfƶrmig, balkenfƶrmig und/oder linienfƶrmig ausgebildet sind.In the event that the 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)

Gesichtsmaske, enthaltend ein Filtermaterial, das mindestens eine dem Gesicht zugewandten innere Lage und mindestens eine ƤuƟere Lage soie mindestens eine Zwischenlage aufweist, wobei die mindestens eine Zwischenlage elektrostatisch geladene Stapelfasern und/oder elektrostatisch geladene Filamente und/oder elektrostatisch geladene Faser-Netzwerke enthƤlt oder daraus besteht dadurch gekennzeichnet, dass auf die elektrostatisch geladenen Fasern der Zwischenlage oberflƤchlich ein pulverfƶrmiges Absorptionsmaterial aufgebracht ist.A face mask comprising a filter material having at least one inner facing facing the face and at least one outer facing at least one intermediate layer, wherein the at least one intermediate layer contains electrostatically charged staple fibers and / or electrostatically charged filaments and / or electrostatically charged fiber networks or thereof characterized in that a powdered absorbent material is superficially applied to the electrostatically charged fibers of the intermediate layer. Gesichtsmaske nach Anspruch 1, dadurch gekennzeichnet, dass die Fasern der Zwischenlage ladungsstabilisierende ZusƤtze enthalten.Face mask according to claim 1, characterized in that the fibers of the intermediate layer contain charge-stabilizing additives. Gesichtsmaske nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Fasern der Zwischenlage eine triboelektrische Ladung aufweisen.Face mask according to claim 1 or 2, characterized in that the fibers of the intermediate layer have a triboelectric charge. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die elektrostatisch geladenen Stapelfasern glatt, verzweigt, gekrimpt, hohl und/oder texturiert sind und/oder einen nicht kreisfƶrmigen, insbesondere einen trilobalen Querschnitt aufweisen.Face mask according to one of the preceding claims, characterized in that the electrostatically charged staple fibers are smooth, branched, crimped, hollow and / or textured and / or have a non-circular, in particular a trilobal cross-section. Gesichtsmaske nach einem der AnsprĆ¼che 1 bis 4, dadurch gekennzeichnet, dass das Absorptionsmaterial in einer Menge von 1 bis 50 Gew.-%, bevorzugt 7 bis 25 Gew.-%, bezogen auf die elektrostatisch geladenen Stapelfasern und/oder Filamente, aufgebracht ist.Face mask according to one of claims 1 to 4, characterized in that the absorption material in an amount of 1 to 50 wt .-%, preferably 7 to 25 wt .-%, based on the electrostatic loaded staple fibers and / or filaments. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass das Absorptionsmaterial ausgewƤhlt ist aus hydrophoben Zeolithen, hydrophoben porƶsen Polymeren und/oder kristallinen metallorganischen Komplexen und/oder Mischungen hiervon, wobei Aktivkohle als Absorptionsmaterial ausgeschlossen ist.Face mask according to one of the preceding claims, characterized in that the absorbent material is selected from hydrophobic zeolites, hydrophobic porous polymers and / or crystalline organometallic complexes and / or mixtures thereof, wherein activated carbon is excluded as the absorbent material. Gesichtsmaske nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass die Zeolithe a) Mikroporen mit einer PorengrĆ¶ĆŸe > 5 ƅ, bevorzugt > 6,5 ƅ und/oder b) eine spezifische OberflƤche von > 400 m2/g und/oder c) ein Modul > 200, bevorzugt > 300 und/oder d) eine PartikelgrĆ¶ĆŸe im Bereich von 2 bis 30 Āµm aufweisen. Face mask according to the preceding claim, characterized in that the zeolites a) micropores with a pore size> 5 ƅ, preferably> 6.5 ƅ and / or b) a specific surface of> 400 m 2 / g and / or c) a module> 200, preferably> 300 and / or d) have a particle size in the range of 2 to 30 microns. Gesichtsmaske nach Anspruch 6, dadurch gekennzeichnet, dass die porƶsen Polymere a) Mikroporen von 6 bis 20 ƅ, Mesoporen von 20 bis 500 ƅ und Makroporen > 500 ƅ und/oder b) einen durchschnittlichen Porendurchmesser zwischen 3 und 300 ƅ und/oder c) eine PartikelgrĆ¶ĆŸe im Bereich von 1 bis 500 Āµm, bevorzugt 1 bis 200 Āµm und/oder d) ein Porenvolumen ā‰„ 0,4 cm3/g aufweisen und/oder e) hydrophob sind. Face mask according to claim 6, characterized in that the porous polymers a) micropores of 6 to 20 ƅ, mesopores of 20 to 500 ƅ and macropores> 500 ƅ and / or b) an average pore diameter between 3 and 300 ƅ and / or c) a particle size in the range of 1 to 500 microns, preferably 1 to 200 microns and / or d) have a pore volume ā‰„ 0.4 cm 3 / g and / or e) are hydrophobic. Gesichtsmaske nach einem der AnsprĆ¼che 6 oder 8, dadurch gekennzeichnet, dass die porƶsen Polymere aufgebaut sind aus Polystyrol, PolyacrylsƤure und/oder deren Derivaten.Face mask according to one of claims 6 or 8, characterized in that the porous polymers are composed of polystyrene, polyacrylic acid and / or derivatives thereof. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die mindestens eine Zwischenlage aus Split-Fasern oder triboelektrischen Stapelfasern besteht oder als geladener Filamentvliesstoff vorliegt.Face mask according to one of the preceding claims, characterized in that the at least one intermediate layer consists of split fibers or triboelectric staple fibers or is present as a charged filament nonwoven fabric. Gesichtsmaske nach Anspruch 10, dadurch gekennzeichnet, dass die Split-Fasern als Faservlieslage, die auch vernadelt sein kann, vorliegen.Face mask according to claim 10, characterized in that the split fibers are present as a non-woven fabric layer, which may also be needled. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die innere Lage und die ƤuƟere Lage unabhƤngig voneinander ausgewƤhlt sind aus der Gruppe bestehend aus Vliesstofflagen, wie z.B. aus Feinfaserspinnvlieslagen (Melt-blown) oder Spinnvlies, und/oder Gewebe.Face mask according to one of the preceding claims, characterized in that the inner layer and the outer layer are independently selected from the group consisting of nonwoven fabric layers, such as from fine fiber spunbond layers (melt-blown) or spunbonded fabric, and / or tissue. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die Lagen durch SchweiƟverbindungen untereinander verbunden sind, mit der MaƟgabe dass bezogen auf die gesamte durchstrƶmbare FlƤche des Filtermaterials durchschnittlich maximal 19, bevorzugt maximal 10, besonders bevorzugt maximal 5 SchweiƟverbindungen pro 10 cm2 vorhanden sind.Face mask according to one of the preceding claims, characterized in that the layers are interconnected by welded joints, with the proviso that based on the total permeable 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 , Gesichtsmaske nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass die gesamte durchstrƶmbare FlƤche des Filterbeutels durchschnittlich maximal 19 SchweiƟverbindungen pro 10 cm2 aufweist und der PressflƤchenanteil des SchweiƟmusters maximal 2 %, bevorzugt maximal 1 %, betrƤgt.Face mask according to the preceding claim, characterized in that the total 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 a maximum of 2%, preferably a maximum of 1%. Gesichtsmaske nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass Lagen randseitig miteinander verbunden sind.Face mask according to one of the preceding claims, characterized in that layers are connected to each other at the edge.
EP20100015037 2010-11-26 2010-11-26 Face mask with powder absorption material attached to electrostatically charged stapled fibres Active EP2457618B1 (en)

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EP20100015037 EP2457618B1 (en) 2010-11-26 2010-11-26 Face mask with powder absorption material attached to electrostatically charged stapled fibres
PCT/EP2011/005694 WO2012069147A1 (en) 2010-11-26 2011-11-11 Face mask having powdered absorption material applied to electrostatically charged staple fibers

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