DE202020103076U1 - Respirator - Google Patents

Abstract

Respirator comprising a piece of filter material made of an air-permeable material and at least one fastening strap,
wherein the air-permeable material comprises at least one layer of a nonwoven fabric which comprises or consists of fibers which are formed from one or more recycled plastics, and
wherein the at least one fastening strap is designed for fastening the respirator to the head.

Description

The invention relates to a respirator.

Respiratory masks regularly cover the wearer's mouth and nose with a filter material and serve to protect the wearer from pollutants contained in the air and to protect the environment from exhaled bacteria and viruses. In this respect, the term includes, among other things, mouth and nose protection, medical face masks and filtering half masks.

The filter material used nowadays generally consists of a nonwoven fabric made from plastic. Many respirators are intended for single use and are disposed of afterwards.

In view of the ever increasing need for respirators, this leads to a large amount of plastic waste.

In view of this, the object on which the invention is based is to provide a respiratory protection mask which is improved from an ecological point of view and has good filter and protective properties.

This object is achieved by a breathing mask according to claim 1.

The invention relates to a respirator comprising a piece of filter material made of an air-permeable material and at least one fastening strap,
wherein the air-permeable material comprises or consists of at least one layer of a nonwoven fabric of the fibers which are formed from a recycled plastic or several recycled plastics, and
wherein the at least one fastening strap is designed for fastening the respirator to the head

The term “recycled plastic” used for the purposes of the present invention is to be understood as a synonym for recycled plastic. A recycled plastic or a plastic recyclate is obtained from the recycling of production, processing (pre-consumer) or post-consumer waste. The processing into recyclate typically takes place in the form of regrinds, regranulates, regrinds or compounds, agglomerates or compacts. The recycled material produced is used again in processing into plastic products. Recycled plastic is therefore a secondary raw material. With regard to the characterization of plastic waste, reference is made to the standard DIN EN 15347: 2007.

The filter part of the respirator in the form of the piece of filter material is accordingly made of an air-permeable material that can be constructed in one or more layers. At least one of these layers is a nonwoven fabric which comprises recycled plastics and is in particular formed from recycled plastics.

In contrast to the respiratory masks known from the prior art, less or no fresh / pure (virgin) plastic material (primary material) is used to manufacture the nonwovens on which the piece of filter material of the respiratory mask is based, but predominantly or exclusively plastics are used, which were already in use and recovered through appropriate recycling processes (secondary material). Such respiratory masks are clearly advantageous from an ecological point of view, since they can be produced to a high degree in a raw material-neutral manner.

In the context of the present invention, 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 (ie on an industrial scale). The minimum web tension required for such a winding 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 up. This results in a minimum maximum tensile force for a material to be wound up of 8.8 N per 5 cm strip width.

A “fiber fleece” (or simply “fleece” for short) corresponds to a random structure that has not gone through a solidification step, so that, in contrast to a nonwoven material, such a random structure does not have sufficient strength to be wound or unwound mechanically, for example to become.

The term “nonwoven” is used in other words according to the definition of the ISO standard ISO 9092: 1988 or CEN standard EN 29092 used. Details on the use of the definitions and / or methods described therein can also be found in the textbook “Vliesstoffe”, H. Fuchs, W. Albrecht, WILEY-VCH, 2012 , remove.

"Fibers" are both fibers of finite length (e.g. staple fibers) and fibers of theoretically infinite length, i.e. continuous fibers or filaments.

In one embodiment, the fibers are one or more nonwovens that are im air-permeable material of the piece of filter material or of the filter part of the respirator mask are included, formed from a single recycled plastic material.

• Einerseits kann es sich um ein Gemisch mindestens zweier Fasertypen handeln, beispielsweise um Fasergemische, die aus zumindest zwei unterschiedlichen rezyklierten Kunststoffen gebildet sind.

Alternatively, however, it is also possible if the fibers of one or more nonwovens are formed from different materials, at least one of which is a recycled plastic. Two embodiments in particular are conceivable here:

• On the one hand, it can be a mixture of at least two types of fibers, for example fiber mixtures which are formed from at least two different recycled plastics.

On the other hand, it is also possible that the nonwoven contains bicomponent fibers (BiKo fibers) or is formed from them. These can consist of a core and a jacket surrounding the core. The core and jacket are made of different materials. In addition to core / sheath bicomponent fibers, the other common variants of bicomponent fibers (e.g. side by side) can also be used.

The bicomponent fibers can be in the form of staple fibers or as an extrusion nonwoven (for example as a meltblown, spunbond or spun-blown nonwoven), so that the bicomponent fibers theoretically have an infinite length and represent so-called filaments. In the case of such bicomponent fibers, it is advantageous if at least the core is formed from a recycled plastic; a virgin plastic, for example, but alternatively another recycled plastic can also be used for the sheath.

Bicomponent fibers, the core of which is made of recycled polyethylene terephthalate (rPET) or recycled polypropylene (rPP), are particularly advantageous; the sheath consists of polypropylene, which can be "virgin" or a recycled material.

In particular, when the bicomponent fibers are used as binding fibers, both the core and the sheath can consist of recycled plastics. If the bicomponent fibers are present in the meltblown, the jacket is preferably made of virgin material in order to be reliably and persistently chargeable.

For the nonwovens for the purposes of the present invention it is possible that these are drylaid, wetlaid or extrusion nonwovens. Accordingly, the fibers of the nonwovens can have a finite length (staple fibers), but also theoretically have an infinite length (filaments).

The respiratory protection mask can in particular consist of the piece of filter material and the at least one fastening strap. The fastening tape can be welded or glued to the piece of filter material. According to an alternative, the fastening band can also be connected to the piece of filter material in a form-fitting manner, for example by means of a rivet.

The piece of filter material forms the filter part of the respiratory protection mask, with which the inhaled and exhaled air is filtered.

The recycled plastic can be selected from the group consisting of recycled polyesters, in particular recycled polyethylene terephthalate (rPET), recycled polybutylene terephthalate (rPBT), recycled polylactic acid (rPLA), recycled polyglycolide and / or recycled polycaprolactone; recycled polyolefins, in particular recycled polypropylene (rPP), recycled polyethylene and / or recycled polystyrene (rPS); recycled polyvinyl chloride (rPVC), recycled polyamides and mixtures and combinations thereof.

There are relevant international standards for many plastic recyclates. For PET plastic recyclates, for example DIN EN 15353: 2007 relevant. PS recyclates are used in DIN EN 15342: 2008 described in more detail. PE recyclates are used in DIN EN 15344: 2008 treated. PP recyclates are used in DIN EN 15345: 2008 characterized. PVC recyclates are in DIN EN 15346: 2015 referred to in more detail. For the purpose of the corresponding special plastic recyclates, the present patent application adopts the definitions of these international standards. The plastic recyclates can be obtained from metallized or non-metallized raw materials. An example of non-metallized raw materials are plastic flakes or chips recovered from PET beverage bottles. The raw materials can also be metallized, for example if they were obtained from metallic plastic films, in particular metallized PET films (MPET).

The recycled plastic is in particular recycled polyethylene terephthalate (rPET), which was obtained, for example, from beverage bottles, in particular from so-called bottle flakes, that is to say pieces of ground beverage bottles.

The recycled plastics, especially the recycled PET, in both the metallized and the non-metallized version, can be spun into the corresponding fibers, from which the corresponding staple fibers or meltblown or spunbond nonwovens can be produced for the purposes of the present invention.

In a variant, the air-permeable material can be constructed in a single layer, i.e. composed of exactly one layer of a nonwoven fabric as described, i.e. it can consist of it. The nonwoven fabric can be a spun-blown, in particular made from bicomponent fibers. As described above, the core can be formed from a recycled plastic; for the jacket, for example, a virgin / primary plastic can be used. The nonwoven fabric can be calendered. This increases the strength.

A spun-blown nonwoven fabric can be electrostatically charged (e.g. by corona charging or hydrocharging).

In another variant, the air-permeable material can have a multilayer structure, with at least one, several or all of the layers comprising or being formed from a nonwoven, the nonwoven comprising or consisting of fibers which comprise or are formed from a recycled plastic or several recycled plastics are. A specific choice of the individual non-woven fabric and their parameters enables a controlled setting of the filter properties of the respirator.

In the case of a multi-layer structure, the layers can be welded to one another all the way around their edges.

The present invention covers several particularly preferred options for the multilayer design of the air-permeable material, which are presented below. The majority of these layers can be connected to one another by means of welded connections. The layers can also be glued to one another.

The filter part or the piece of filter material of the (finished, but unused) respiratory protection mask can (in plan view) have a polygonal, in particular essentially rectangular, shape. This also applies in particular to the case of a piece of filter material with folds. The filter part or the piece of filter material can have a three-dimensional shape, for example due to spatial deformation. The latter in particular allows a more precise adaptation to the shape of the face, which leads to a lower leakage volume flow.

According to one embodiment, the air-permeable material comprises at least one support layer and at least one fine filter layer, with at least one or all of the support layers comprising or being formed from recycled plastics and / or at least one or all of the fine filter layers being nonwovens comprising one or more recycled plastics or are formed from it.

In particular, the fine filter layer enables the protective and filtering function of the respirator mask.

A multilayer air-permeable material can have a meltblown layer between two support or carrier layers. The meltblown layer, which is the fine filter layer, enables high filter performance. The meltblown system can be electrostatically charged (e.g. by corona charging or hydrocharging).

One or both carrier layers can be a nonwoven fabric, in particular a spunbond or a spun-blown. Alternatively, 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.

A support layer (sometimes also called “carrier layer” or “reinforcement layer”) in the sense of the present invention is a layer which gives the multilayer composite of the piece of filter material the necessary mechanical strength. This refers to an open, porous nonwoven fabric or a nonwoven with a light weight per unit area. A support layer is used, among other things, to support other layers or layers. The support layer, like any other layer of the filter material, can optionally also be electrostatically charged, provided that the material has suitable dielectric properties.

A fine filter layer is used to increase the filtration performance of the multi-layer filter material piece by trapping particles which, for example, pass through the support layer. To further increase the separation efficiency, the fine filter layer can preferably be charged electrostatically (e.g. by corona discharge or hydrocharging).

In the case of respiratory masks, each support layer can be a spunbond, preferably with a grammage of 5 to 80 g / m ² , more preferably 10 to 50 g / m ² , more preferably 15 to 30 g / m ² and / or preferably with a Titer of the filaments forming the spunbonded nonwoven in the range from 0.5 dtex to 15 dtex.

The air-permeable material can preferably comprise one to three support layers.

If two support layers are present, the total grammage of the sum of all support layers is preferably 10 to 200 g / m ² , more preferably 15 to 150 g / m ² , more preferably 20 to 100 g / m ² , more preferably 30 to 90 g / m ² , in particular 40 to 70 g / m ² .

In particular, it is preferred that all support layers are formed from a recycled plastic or several recycled plastics, in particular from rPET or rPP.

According to a further advantageous embodiment, each fine filter layer is an extrusion nonwoven, in particular a meltblown nonwoven, preferably with a grammage of 10 to 80 g / m ² , more preferably 15 to 50 g / m ² , in particular 20 to 40 g / m ² .

It is possible here for the air-permeable material to comprise 1 to 5 fine filter layers.

If at least two fine filter layers are present, the total grammage of the sum of all fine filter layers is preferably 10 to 80 g / m ² , more preferably 15 to 50 g / m ² , in particular 20 to 40 g / m ² .

In particular, it is preferred if at least one, preferably all of the fine filter layers have a recycled plastic or several recycled plastics, in particular comprising an rPP, or are formed therefrom. The at least one fine filter layer can be a bicomponent meltblown, the core of the bicomponent fibers being formed from an rPP.

To increase the filtration performance, at least one, preferably all of the fine filter layers can be electrostatically charged.

• eine Stützlage, eine oder zwei Feinfilterlagen sowie eine weitere Stützlage.

One embodiment of the structure of the air-permeable material for the respirator according to the invention provides the multilayer structure described below with a sequence of layers:

• a support layer, one or two fine filter layers and another support layer.

In particular, if the support layer is constructed as a spunbond nonwoven and the fine filter layer as a meltblown nonwoven, then there is an SMS or SMMS structure.

At least one of the layers comprises at least one recycled plastic material, in particular rPET or rPP. At least all of the support layers are particularly preferably formed from recycled plastics.

In the case of the respiratory protection mask, the air-permeable material can comprise a meltblown layer made of bicomponent fibers with a core / sheath structure, the core being formed from rPP and the sheath from virgin PP. In particular, the core portion can make up at least 60%, at least 80% or at least 90% of the bicomponent fibers. This allows a high proportion of recycled material with good electrostatic chargeability, the latter resulting in particular from the use of virgin PP for the jacket.

In the case of the respiratory protection masks described, the at least one fastening strap can comprise a recycled plastic or can be formed from one or more recycled plastics. This allows a further increase in the proportion of recycled material in the entire respirator.

The at least one fastening tape can comprise or consist of a layer made of a film and / or a layer of a nonwoven material, for example a meltblown. The nonwoven fabric and / or the laminate of the two layers can be a crimped material (e.g. obtained by means of the Micrex micro-crepe process). Alternatively or additionally, Vistamaxx (manufacturer: ExxonMobil Chemical) can be used as the material for the nonwoven.

The at least one fastening tape can have a multilayer structure, the fastening tape comprising or consisting of a layer of a film and a layer of a nonwoven, in particular a meltblown.

In the case of a fastening tape in the form of a laminate comprising a film and a nonwoven, the film, in particular in the form of a cast film, can be laminated directly onto the nonwoven. This means that no additional adhesive is required.

The at least one fastening tape can comprise a thermoplastic polymer, in particular a recycled thermoplastic polymer, or be formed from it. The thermoplastic polymer can in particular be a thermoplastic elastomer. For example, it can be thermoplastic polyurethane (TPU) or Vistamaxx. Thus, the fastening tape can be designed in the form of a laminate from a TPU film and a TPU meltblown, TPU spunbond or TPU spunblown. This structure results in good elasticity and high stability of the fastening tape. In addition, such a fastening tape can advantageously be welded to the piece of filter material.

The fastening tape can be twisted or twisted to form a cord. This increases the comfort. It is possible to prevent the twisting from turning back again by means of thermal fixation (e.g. ultrasonic welding).

The respiratory protection masks described can (precisely) 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 strap are connected to the filter part or the piece of filter material. Alternatively, for example, the corresponding band can be designed as such closed; it can therefore have a ring or loop shape.

According to an alternative, 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 at least one fastening band can extend over an entire length of the piece of filter material or of the filter part. This allows the at least one fastening tape to run along with the air-permeable material during manufacture and to cut together with it (at the ends of the piece of filter material).

In particular, two fastening straps can be provided which extend over an entire length of the piece of filter material or filter part. These two fastening straps are preferably arranged on the same side of the air-permeable material or piece of filter material and along two opposite edges of the piece of filter material.

The at least one fastening strap can be connected, in particular welded, to the air-permeable material at its two end regions.

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.

In this case, the breathing mask can consist of the air-permeable material, the at least one fastening strap and the nose bridge.

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 nose bridge can be made of aluminum or of PP or PE without a wire insert. The plastic material can be formed from a recycled plastic. 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 an edge of the piece of filter material. The latter allows a simplified production, since the nose bridge can be cut together with the piece of filter material during production.

The nose bridge can be attached non-destructively detachable or non-destructively detachable to the piece of filter material. The nose bridge can be glued or welded to the piece of filter material. The attachment by means of adhesive can be done using a hotmelt. The nose bridge can be connected to the piece of filter material 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 medical face masks in accordance with DIN EN 14683: 2019 + AC: 2019 or as a filtering half mask in accordance with DIN EN 149.

The weight proportion of all recycled materials, based on the total weight of the respiratory protection mask, can be at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90%, in particular 95%.

The air-permeable material of the respiratory protection mask can be creped. The Micrex micro-crepe process in particular can be used for this purpose. Purely by way of example, the WO 2007/079502 referenced. The increase in the surface achieved in this way not only leads to a softer appearance; the piece of filter material can also be better adapted to the shape of the face and absorbs moisture better.

The invention also provides a respiratory protection mask comprising a piece of filter material made of an air-permeable material and at least one fastening strap,
wherein the air-permeable material comprises at least one layer of a nonwoven fabric and / or a layer of a fiber nonwoven and the air-permeable material is creped, and
wherein the at least one fastening strap is designed for fastening the respirator to the head.

The creped air-permeable material leads to an improved breathing mask regardless of the use of recycled plastics. The characteristics, parameters and properties described above can also be used for this breathing mask without the recycled plastics.

In the case of the respiratory masks described above, the fastening strap can be creped. Here, too, the Micrex micro-crepe process can be used in particular.

A creped fastening tape allows advantageous flexibility for adaptation to different head diameters.

Furthermore, the invention provides an item of protective clothing made of an air-permeable material, the air-permeable material comprising at least one layer of a nonwoven fabric which comprises or consists of fibers which are formed from a recycled plastic or several recycled plastics.

The protective clothing item can be, for example, a protective hood, a protective cover for shoes, a protective cape or a protective overalls.

The air-permeable material of the protective garment can also have the characteristics, parameters and properties described above.

In addition, the present invention relates to the use of a recycled plastic, in particular the recycled plastics described above, for example in the form of nonwovens for a respirator or protective clothing, in particular the production of a respirator or protective clothing. With regard to the recycled plastics that can be used for this purpose or the possible design of the nonwovens, reference is made in this regard to the statements above.

• 1 schematisch eine Atemschutzmaske,
• 2 eine schematische Querschnittsansicht des Aufbaus eines Filtermaterialstücks einer Atemschutzmaske,
• 3 eine schematische Draufsicht auf eine Atemschutzmaske.

The present invention is explained in more detail on the basis of the following exemplary embodiments with reference to the figures, without restricting the invention to the specific embodiments shown. Show it

• 1 schematically a respirator,
• 2 a schematic cross-sectional view of the structure of a piece of filter material of a respirator,
• 3 a schematic plan view of a respirator.

1 shows a schematic view of a breathing mask 1 in the form of a half mask. It is an example of a medical face mask. The illustrated respirator 1 comprises a piece of filter material or filter part 2 . The cut of the piece of filter material is basically rectangular, but can also assume other, in particular polygonal, shapes.

On the piece of filter material 2 are two fastening straps in the example shown 3 attached. In the illustrated embodiment, the fastening straps are intended for attachment to the ears of the wearer.

The respirator has a nose bridge for better adaptation to the shape of the face 4th on, which is non-destructively or non-destructively detachable connected to the piece of filter material. In particular, it can be a wire embedded in a plastic material.

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 piece of filter material. For example, a hotmelt can be used for this, which typically also leads to a non-destructive connection.

Alternatively, the nose bridge is made available to the user as a separate element. In this case, the nose bridge has a self-adhesive surface that is initially covered with a protective film. After removing the protective film, the user glues the nose bridge onto the nonwoven fabric. Depending on the adhesive material used, a reuse such a nose bridge for other respiratory protection filter parts.

In the exemplary embodiment, the filter part or the air-permeable material are in the filter part 2 three folds 5 brought in.

In the schematic cross-sectional view of the 2 the structure of a piece of filter material for a respirator is illustrated. Between two support layers 6th is a fine filter layer 7th arranged. The three layers can in particular along the edges, that is to say the circumference, of the filter part 2 as it is in 1 is illustrated, be welded together.

As an alternative to the in 2 The structure shown can also include fewer or more layers of the air-permeable material of the respiratory protection mask. For example, only one support layer and one fine filter layer can be provided.

• Als Stützlagen 6 kommen insbesondere Spinnvlieslagen aus rPET oder rPP mit einem Flächengewicht von 5 bis 50 g/m² und einem Titer von 1 dtex bis 15 dtex in Frage. Als Rohstoff werden beispielsweise PET-Abfälle (z. B. Stanzabfälle) und sogenannte Bottleflakes, also Stücke gemahlener Getränkeflaschen verwendet. Um die unterschiedliche Färbung der Abfälle zu überdecken, ist es möglich, das Rezyklat einzufärben. Als thermisches Bindeverfahren für die Verfestigung des Spunbondvliesstoffs ist insbesondere das HELIX® (Comerio Ercole) Verfahren vorteilhaft.

In one embodiment, the respiratory masks have one or more layers of rPET or rPP filaments or rPET or rPP staple fibers. To the individual filter layers:

• As support layers 6th Spunbond layers made of rPET or rPP with a weight per unit area of 5 to 50 g / m ² and a titer of 1 dtex to 15 dtex are particularly suitable. PET waste (e.g. punching waste) and so-called bottle flakes, i.e. pieces of ground beverage bottles, are used as raw materials. In order to cover up the different colors of the waste, it is possible to color the recyclate. The HELIX® (Comerio Ercole) process is particularly advantageous as a thermal bonding process for consolidating the spunbond nonwoven.

As fine filter layers 7th one or more layers of meltblown made of rPET or rPP with a weight per unit area of 5 to 30 g / m ² each are used. In addition, one or more meltblown nonwoven layers made of virgin PP can be present. At least this layer (s) are electrostatically charged. The layers made of rPET or rPP can also be electrostatically charged. It is only important to ensure that no metallized PET waste is used for production. Alternatively, the meltblown filaments can also consist of bicomponent fibers in which the core is made of rPET or rPP and the sheath is made of a plastic that can be electrostatically charged (e.g. virgin PP, PC, PET).

The filaments or staple fibers can also consist of bicomponent materials in which the core is made of rPET or rPP and the sheath is made of a plastic that can be particularly well electrostatically charged (e.g. virgin PP, PC, PET).

Specifically, the piece of filter material can consist of a three-layer air-permeable material. It is located between two Spunbondvliesstofflagen rPET with a grammage of 20 g / m ^2, a Meltblownvliesstofflage with a grammage of 20 g / m ^2. The SMS obtained in this way can be ultrasonically welded by means of a weld seam running around the edges.

The meltblown can be made by adding additives and a water jet treatment (hydrocharging), as for example in the WO 97/07272 is described, be electrostatically charged.

Alternatively, the meltblown can have a grammage of 25 g / m ² and have been electrostatically charged by means of a corona treatment.

The meltblown can consist of bicomponent fibers with a core made of rPP and a sheath made of virgin PP. The meltblown can be produced, for example, with a meltblown machine from Hills Inc., West Melbourne, FL, USA. This enables a high proportion of recyclate to be achieved despite electrostatic charging.

The SMS can be creped. The Micrex micro-crepe process in particular can be used for this purpose. Purely by way of example, the WO 2007/079502 referenced. The increase in surface area achieved in this way not only leads to a softer appearance, it can also be better adapted to the shape of the face and absorbs moisture better.

3 shows a schematic plan view of an air-permeable material 8th that the filter part 2 the 1 is equivalent to. Compared to the 1 shows 3 however, the back of the filter part, so the side facing a user.

In the illustrated example are on opposite edges of the air-permeable material 8th one fastening strap each 9 arranged that extends over the entire edge length. The fastening straps can thus run along with the air-permeable material during the manufacture of the filter part and can be cut together with it. In the example shown, the fastening tape and the air-permeable material are connected via one welding point in each case 10 at the opposite end regions of each fastening tape 9 .

For the fastening tape, for example, a TPU laminate made of a TPU film with a thickness of 20 µm to 100 µm and a TPU meltblown is used (Grammage: 20 to 80 g / m ² ) is used, which is welded to the piece of filter material. The TPU used is used in the form of a plastic recyclate. The European patent applications can be used for welding to achieve high strength EP 18213001.3 and EP 19180533.2 use methods disclosed in another technical field.

The PP material produced according to the Vistamaxx process can be produced using the meltblown or film casting or blown film process and - as described for the TPU laminate - have been laminated.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 2011556 A1 [0037]
• WO 2007/079502 [0075, 0100]
• WO 9707272 [0097]
• EP 18213001 [0103]
• EP 19180533 [0103]

Non-patent literature cited

• DIN EN 29073-3: 1992-08 [0011]
• ISO 9092: 1988 [0013]
• EN 29092 [0013]
• "Vliesstoffe", H. Fuchs, W. Albrecht, WILEY-VCH, 2012 [0013]
• DIN EN 15353: 2007 [0025]
• DIN EN 15342: 2008 [0025]
• DIN EN 15344: 2008 [0025]
• DIN EN 15345: 2008 [0025]
• DIN EN 15346: 2015 [0025]

Claims (14)

Respirator comprising a piece of filter material made of an air-permeable material and at least one fastening strap, wherein the air-permeable material comprises at least one layer of a nonwoven fabric which comprises or consists of fibers which are formed from one or more recycled plastics, and wherein the at least one fastening strap is designed for fastening the respirator to the head. Respirator after Claim 1 wherein the recycled plastic is selected from the group consisting of recycled polyesters, in particular recycled polyethylene terephthalate (rPET), recycled polybutylene terephthalate (rPBT), recycled polylactic acid (rPLA), recycled polyglycolide and / or recycled polycaprolactone; recycled polyolefins, in particular recycled polypropylene (rPP), recycled polyethylene and / or recycled polystyrene (rPS); recycled polyvinyl chloride (rPVC), recycled polyamides and mixtures and combinations thereof. Respiratory protection mask according to one of the preceding claims, wherein the air-permeable material is constructed in several layers, with at least one, several or all of the layers comprising or being formed from a non-woven fabric, the non-woven fabric or fibers comprising or consisting of a recycled plastic or several recycled plastics include or are formed from it. Respiratory protection mask according to one of the preceding claims, wherein the air-permeable material comprises at least one support layer and at least one fine filter layer, wherein at least one, several or all of the support layers and / or at least one, several or all of the fine filter layers are nonwovens that contain one or more recycled plastic Include plastics or are formed from them. Respiratory protection mask according to the preceding claim, wherein a) each support layer is a spunbond, preferably with a grammage of 5 to 80 g / m ² , more preferably from 10 to 50 g / m ² , more preferably from 15 to 30 g / m ² and / or preferably with a titer of the fibers forming the spunbonded nonwoven in the range from 0.5 dtex to 15 dtex, b) the air-permeable material comprises 1 to 3 support layers, c) if at least two support layers are present, the total grammage of the sum of all support layers 10 to 200 g / m ² , preferably 15 to 150 g / m ² , more preferably 20 to 100 g / m ² , more preferably 30 to 90 g / m ² , in particular 40 to 70 g / m ² , and / or d) all Support layers are formed from a recycled plastic or several recycled plastics, in particular from rPET. Respiratory protection mask according to one of the two preceding claims, wherein a) each fine filter layer is an extrusion nonwoven, in particular a meltblown nonwoven, preferably with a grammage of 10 to 80 g / m ² , in particular 15 to 50 g / m ² , in particular 20 to 40 g / m ² , b) the air-permeable material comprises 1 to 5 fine filter layers, c) if at least two fine filter layers are present, the total grammage of the sum of all fine filter layers 10 to 80 g / m ² , in particular 15 to 50 g / m ² , in particular 20 to 40 g / m ² , d) at least one, preferably all of the fine filter layers are made from a recycled plastic or several recycled plastics, in particular from rPET, and / or e) at least one, preferably all of the fine filter layers are electrostatically charged. Respiratory protection mask according to one of the preceding claims, wherein the air-permeable material is formed in several layers with a layer sequence: a support layer, one or two fine filter layers and another support layer. Respiratory protection mask according to one of the preceding claims, wherein the air-permeable material comprises a meltblown layer made of bicomponent fibers with a core / jacket structure, the core being formed from rPP and the jacket from virgin PP. Respiratory protection mask according to one of the preceding claims, wherein the at least one fastening strap comprises a recycled plastic or is formed from one or more recycled plastics. Respirator after Claim 9 , wherein the at least one fastening tape is constructed in multiple layers, wherein the fastening tape comprises or consists of a layer of a film and a layer of a meltblown Respiratory protection mask according to one of the preceding claims, wherein the fastening tape comprises a thermoplastic polymer, in particular a recycled thermoplastic polymer, or is formed therefrom. Respirator after Claim 11 wherein the thermoplastic polymer is a thermoplastic elastomer. Respiratory protection mask according to one of the preceding claims, wherein the weight proportion of all recycled materials, based on the total weight of the respiratory protection mask, is at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90%, in particular at least 95%. Use of a recycled plastic, in particular in the form of a nonwoven fabric and / or a fiber fleece for a respiratory protection mask.

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