DE202020103827U1 - Antiviral and / or antibacterial protective mouth and nose mask - Google Patents

Abstract

Mouth and nose protection mask (10, 10 '), characterized in that the mouth and nose protection mask (10, 10') has a layer structure with a layer composite of at least three fleece layers (11, 12, 14a), with at least one middle layer (12 , 13) the fleece layers, which is arranged in the middle of the layer composite, is equipped with an antibacterial and / or antiviral dispersion or emulsion.

Description

The present invention relates to an antiviral and / or antibacterial protective mouth and nose mask.

Known mouth and nasal masks use a filter fleece which has several polypropylene fiber fleece layers produced in the meltblown process. This filter fleece is very fine-pored, and its construction gives you a physical filter effect against the finest aerosols and fine dust.

Mouth and nose masks of the classes FFP1, FFP2, FFP3 as well as medical surgical masks currently consist of fleece composites that filter an impinging aerosol from the outside onto the mask or the wearer himself.

However, the 2020 corona pandemic has shown that the procurement of such filter fleeces is a major problem and that the protection of the population is therefore not guaranteed.

The current masks consist of different fleece layers and textures, depending on their structure, which filter aerosols in the foreground. A purely physical filtering of the aerosols takes place. Bacteria or viruses are neither filtered out nor destroyed.

Another problem with known masks is that the current meltblown nonwovens are used as a single filter layer and the filter effect is achieved as a result, as a result of which a low protective effect is achieved.

It is the object of the present invention to create a protective mouth and nose mask which ensures better protection for the wearer and increases the contamination time of the mask.

This object is achieved by an oral and nasal protection mask which has a composite layer of at least three fleece layers, at least one of the middle layers of the fleece layers, which is arranged in the middle of the composite layer, is equipped with an antibacterial and / or antiviral dispersion or emulsion. In this embodiment, the composite layer can also have exactly three fleece layers.

In a preferred embodiment of the invention, the layer composite has at least four fleece layers or exactly four fleece layers, with at least two of the middle layers of the fleece layers, which are arranged in the middle of the layer composite, being equipped with an antibacterial and / or antiviral dispersion or emulsion.

The middle layers, which are arranged in the middle of the composite layer and have an antibacterial and / or antiviral finish, provide effective protection against bacteria and / or viruses.

The resulting extended contamination time is of great advantage for the application, since the current masks can lead to bacterial and virus contamination if the aerosols from outside penetrate them.

This penetration is reduced by the mouth and nose protection mask according to protection claim 1 and the wearer of the mouth and nose protection mask according to the invention, such as a patient, is protected longer by the bacteria and virus reduction.

Due to the preferably wet chemical treatment of the at least two middle layers, the contaminated aerosols, which contain bacteria and viruses, are modified in such a way that bacteria and / or viruses are destroyed and the contamination of the carrier is thus reduced.

In preferred embodiments of the invention, all fleece layers of the layer composite are made from polyester or from a polypropylene / polyester fiber mixture.

The fleece layers of the layer composite are preferably hydroentangled.

Particular advantages result if a first outer nonwoven layer of the composite layer has a weight per unit area (without fluorocarbon finish) in a range from 140 to 145 g / m ² and a fluorocarbon finish based on C6 chemistry.

It is also advantageous if the at least one middle layer arranged in the middle of the composite layer and equipped with the antibacterial and / or antiviral dispersion or emulsion each has a weight per unit area in a range from 90 to 95 g / m ² .

Additional advantages result if a meltblown nonwoven layer, i.e. H. a melt-blown fleece layer is applied.

The at least one meltblown nonwoven layer is advantageously fixed to the respective outer nonwoven layer of the layer composite by means of hydroentanglement.

For example, the layer composite without finishing, but with the meltblown nonwoven layers, can have a weight per unit area in a range from 130 to 135 g / m ² .

In a preferred embodiment of the invention, a first outer of the nonwoven layers of the layer composite consists of a hydroentangled nonwoven made of a mixture of polyethylene and polypropylene and has a weight per unit area in a range from 120 to 140 g / m ^2. Nonwoven layer made of polypropylene with a weight per unit area in a range from 10 to 15 g / m ² and the total weight per unit area of the layer composite with the at least one meltblown nonwoven layer is in a range from 140 to 145 g / m ² .

It has also proven to be advantageous if the at least one middle layer arranged in the middle of the composite layer and equipped with the antibacterial and / or antiviral dispersion or emulsion is each formed from a water jet fleece made from a mixture of polyethylene and polypropylene and has a weight per unit area of 70 to 90 g / m ² , and the meltblown nonwoven layers arranged on both sides of the layer composite consist of polypropylene and have a weight per unit area in a range from 10 to 15 g / m ² , the total basis weight of the layer composite with the meltblown nonwoven layers being 90 to 95 g / m ² amounts to.

Preferably, a second, outer nonwoven layer of the layer composite consists of a hydroentangled nonwoven made of polyethylene and has a weight per unit area in a range from 110 to 130 g / m ² , there is at least one meltblown nonwoven layer made of polypropylene with a weight per unit area in one area of 10 to 15 g / m ² , and the total weight per unit area of the composite layer with the at least one meltblown nonwoven layer is 130 to 135 g / m ² .

An electrical charge is particularly preferably applied to the at least one meltblown nonwoven layer.

The mouth and nose mask can be adapted to the facial contour of a wearer if the layer structure is deep-drawn with the formation of a curvature.

The structure of various embodiments of the protective mouth and nose mask according to the invention is described below with the aid of figures.

• 1 schematisch einen Lagenverbund einer ersten Ausführungsform einer erfindungsgemäßen Mund- und Nasenschutzmaske;
• 2 schematisch einen Lagenverbund einer zweiten Ausführungsform einer erfindungsgemäßen Mund- und Nasenschutzmaske;
• 3 schematisch einen Aufbau einer ersten Decklage des Lagenverbundes der ersten oder der zweiten Ausführungsform der erfindungsgemäßen Mund- und Nasenschutzmaske;
• 4 schematisch einen Aufbau einer zweiten oder einer dritten, jeweils eine Mitte-Ilage bildenden Vlieslage des Lagenverbundes des Schichtaufbaus der ersten oder der zweiten Ausführungsform der erfindungsgemäßen Mund- und Nasenschutzmaske;
• 5 schematisch einen Aufbau einer zweiten Decklage des Lagenverbundes des Schichtaufbaus der ersten oder der zweiten Ausführungsform der erfindungsgemäßen Mund- und Nasenschutzmaske; und
• 6 schematisch einen tiefgezogenen Schichtaufbau einer erfindungsgemäßen Mund- und Nasenschutzmaske.

Show:

• 1 schematically, a composite layer of a first embodiment of an oral and nasal protective mask according to the invention;
• 2 schematically a composite layer of a second embodiment of an oral and nasal protective mask according to the invention;
• 3 schematically a structure of a first cover layer of the composite layer of the first or the second embodiment of the mouth and nose protection mask according to the invention;
• 4th schematically a structure of a second or a third nonwoven layer, each forming a central I-layer, of the composite layer of the layer structure of the first or the second embodiment of the oral and nasal protection mask according to the invention;
• 5 schematically a structure of a second cover layer of the layer composite of the layer structure of the first or the second embodiment of the oral and nasal protection mask according to the invention; and
• 6th schematically a deep-drawn layer structure of an oral and nasal protection mask according to the invention.

1 shows schematically a layer structure of a first embodiment of an oral and nasal protective mask according to the invention 10 .

The mouth and nose mask 10 has a composite layer made up of a first cover layer 11 , two middle layers 12th and 13th and a second top layer 14th on.

2 shows schematically a layer structure of a first embodiment of an oral and nasal protective mask according to the invention 10 ' .

The mouth and nose mask 10 ' has a composite layer made up of a first cover layer 11 , a middle layer 12th and a second top layer 14th on.

In the 1 and 2 The embodiments shown each consist of the first cover layer 11 and the second top layer 14th made of a hydroentangled fleece layer 11a respectively. 14a , which is formed from a mixture of polyethylene and polypropylene, and a meltblown nonwoven layer applied to it and fixed with a water jet 11b respectively. 14b .

The middle layers 12th , 13th consist in the illustrated embodiments each of a hydroentangled fleece layer with an antibacterial and / or antiviral finish.

The top layers each forming the top layer or outer layer of the layer composite 11 , 14th thus consist of a composite material that has been solidified by means of a water jet.

Before the hydroentanglement, the fleece layers of the layer composite are typically carded.

The meltblown fleece layers 11b , 14b are each functional layers that create a first filter effect. In the exemplary embodiments shown, they are made of polypropylene and each have one of the underlying fleece layers 11a , 14a of the layer composite connected.

In the 3 top layer shown schematically individually 11 is subjected to a wet chemical process to ensure that it is water and light alcohol repellent. This equipment also achieves aerosol repellency, which means that aerosols cannot penetrate directly into the material. This equipment also has a protective function with regard to liquid splashes, so that the face mask and nasal mask are not immediately soaked through.

The middle layers 12th , 13th , of which the central position 12th exemplarily schematically in 4th is shown, the respective layer composite are in each case water jet fleeces made of a mixture of polyethylene and polypropylene, which were finished by means of a wet chemical process with the aid of an antibacterial and / or antiviral dispersion or emulsion using a padder. This equipment means that if bacteria or viruses are contaminated, here tested by the manufacturer (H1N1, H5N1, Corona 229E, Staphylococcus aureus, Klebsiella pneumoniae), these bacteria or viruses are deactivated and thus have an antibacterial and / or antiviral effect is produced. The applied chemistry has been dermatologically and toxic tested and does not represent a potential hazard for the person wearing the face mask.

Titanium dioxide and / or silicon dioxide mixed with silver ions in dispersion or in emulsion, preferably with additional surfactants for better wetting, can be used as the chemical basis for an antibacterial and / or antiviral dispersion or emulsion that can be used according to the invention.

The example in 5 illustrated second top layer 14th The layer composite consists of a composite material made of a water jet fleece 14a made of polyethylene and polypropylene with a meltblown fleece layer 14b made of polypropylene. On the side of the meltblown fleece layer 14b the second top layer 14th an electrical charge was applied after the layers were joined, so that no adhesion of dust particles is possible. The meltblown side, which is directed inwards, therefore has a certain water and particle repellency, whereby an additional filter effect is achieved. Furthermore, the side of the cover layer facing the face faces 14th does not have any cytotoxic properties and can therefore be worn in direct contact with the skin.

After applying the meltblown fleece layers 11b , 14b the layer structure is typically dried.

Thereafter, electrical charging or discharging can occur, in particular one or both of the outer meltblown nonwoven layers 11b , 14b the layer structure can be made. For this purpose, an electrical corona treatment or a plasma technology or a treatment with a linear plasma can be used. During the corona treatment, a plasma discharge activates the ambient air in an electrode gap and the surface of the meltblown fleece layers 11b , 14b . With the plasma technology based on the corona treatment, plasma ignition and discharge takes place in a nitrogen atmosphere, with the surface of the meltblown fleece layers 11b , 14b is activated. Both in corona treatment and in plasma technology, the layer structure to be treated is carried out between a plasma electrode and a roller acting as a counter electrode, which limits the thickness of the layer structure that can be carried out. If a linear plasma is used, the plasma is created in an electrode housing and is blown onto the layer structure with compressed air or a process gas. In all of the methods mentioned, there is in each case a charge application to at least one of the outer surfaces of the layer structure of the respective mouth and nose protection mask 10 , 10 ' instead of.

The composite layer of this fleece composition results in a mask structure which produces a filter effect with regard to fine particles as well as bacteria and / or viruses. Current studies show that the particle sizes of bacteria and viruses are below the filter effect of the existing filter systems. This reduces the contamination time.

This can be improved by the combination of fleece and chemistry, and thus the protective function of the protective mouth and nose mask according to the invention is increased.

As in 6th shown, the in the 1 and 2 The layer structure of the face and nose mask shown 10 , 10 ' be deep-drawn by a pressing process and thus adapted to the general facial features of the wearer.

Due to the on the fleece layers 11a respectively. 14a Meltblown fleece layers applied by means of hydroentanglement 11b , 14b the result is a better filter effect and thus an improved filter performance.

With the mouth and nose mask according to the invention 10 , 10 ' the filter layers are distributed over several layers of the mask fleece structure. This leads to a better filter performance and thus also to a longer protection of the wearer with regard to the contamination time.

List of reference symbols

10

Mouth and nose protection mask

10 '

Mouth and nose protection mask

11

first top layer

11a

Water jet fleece, e.g. B. with 130 g / m ² basis weight

11b

Meltblown non-woven layer, e.g. B. with 10-15 g / m ² basis weight

12th

Water jet fleece, e.g. B. with 80 g / m ² surface weight, and an antiviral and / or antibacterial finish

13th

Water jet fleece z. B. with 80 g / m ² surface weight and an antiviral and / or antibacterial finish

14th

second top layer

14a

Water jet fleece, e.g. B. with 80 g / m ² basis weight

14b

Meltblown non-woven layer, e.g. B. with 10-15 g / m ² basis weight

Claims (15)

Mouth and nose protection mask (10, 10 '), characterized in that the mouth and nose protection mask (10, 10') has a layer structure with a layer composite of at least three fleece layers (11, 12, 14a), with at least one middle layer (12 , 13) the fleece layers, which is arranged in the middle of the layer composite, is equipped with an antibacterial and / or antiviral dispersion or emulsion. Mouth and nose mask after Claim 1 , characterized in that the layer composite has at least four fleece layers (11, 12, 13, 14a), at least two middle layers (12, 13) of the fleece layers, which are arranged in the middle of the layer composite, with the antibacterial and / or antiviral dispersion or emulsion are equipped. Mouth and nose mask after Claim 1 or 2 , characterized in that the fleece layers (11, 12, 13, 14a) of the composite layer are made of polyester or a polypropylene / polyester mixture. Mouth and nose protection mask according to one of the preceding claims, characterized in that the fleece layers (11, 12, 13, 14a) of the layer composite are hydroentangled. Mouth and nose protection mask according to one of the preceding claims, characterized in that a first cover layer (11) of the layer composite has a fluorocarbon finish based on C6 chemistry and a weight per unit area without fluorocarbon finish in a range from 140 to 145 g / m ² . Mouth and nose protection mask according to one of the preceding claims, characterized in that the at least one central layer (12, 13) each has a weight per unit area in a range from 90 to 95 g / m ² . Mouth and nose protection mask according to one of the preceding claims, characterized in that a meltblown fleece layer (11b, 14b) is applied to at least one outer fleece layer (11a, 14a) of the composite layer. Mouth and nose mask after Claim 7 , characterized in that the at least one meltblown fleece layer (11b, 14b) is fixed to the respective outer fleece layer (11a, 14a) of the layer composite by means of hydroentanglement. Mouth and nose mask after Claim 7 or 8th , characterized in that the layer composite without finishing, but with the meltblown nonwoven layers (11b, 14b), has a weight per unit area in a range from 130 to 135 g / m ² . Mouth and nose mask after Claim 1 , characterized in that a first outer nonwoven layer (11a, 14a) of the layer composite consists of a hydroentangled nonwoven made of a mixture of polyethylene and polypropylene and has a weight per unit area in a range from 120 to 140 g / m ² , on the layer composite at least one meltblown - Non-woven layer (11b, 14b) made of polypropylene with a weight per unit area in a range from 10 to 15 g / m ² and the total weight per unit area of the composite layer with the at least one meltblown non-woven layer (11b, 14b) in a range from 140 to 145 g / m ² is located. Mouth and nose mask after Claim 10 , characterized in that the at least one middle layer (12, 13) of the layer composite is formed from a hydroentangled fleece made from a mixture of polyethylene and polypropylene and has a weight per unit area of 70 to 90 g / m ² , and the meltblown arranged on both sides of the layer composite - Nonwoven layers (11b, 14b) consist of polypropylene and have a weight per unit area in a range from 10 to 15 g / m ² , the total weight per unit area of the composite layer with the meltblown nonwoven layers (11b, 14b) being 90 to 95 g / m ² . Mouth and nose mask after Claim 1 , characterized in that a second outer nonwoven layer (14a) of the layer composite consists of a hydroentangled nonwoven made of polyethylene and has a weight per unit area in a range from 110 to 130 g / m ² , on the layer composite at least one meltblown nonwoven layer (11b, 14b) is formed from polypropylene with a weight per unit area in a range from 10 to 15 g / m ² , and the total weight per unit area of the composite layer with the at least one meltblown nonwoven layer (11b, 14b) is 130 to 135 g / m ² . Mouth and nose mask after Claim 12 , characterized in that at least one of the meltblown fleece layers (11b, 14b) is electrically charged or discharged. Mouth and nose protection mask according to one of the preceding claims, characterized in that the layer structure of the mouth and nose protection mask is deep-drawn with the formation of at least one arch. Mouth and nose protection mask according to one of the preceding claims, characterized in that the antibacterial and / or antiviral dispersion or emulsion is titanium oxide and / or silicon dioxide mixed with silver ions.

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