ES1257154U - MULTILAYER FABRIC FOR THE MANUFACTURE OF PROTECTIVE MASKS AND FILTERS FOR SUCH MASKS (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Multilayer fabric for the manufacture of protection masks and filters for said masks, characterized by comprising at least five layers (4, 5, 6, 7 and 8) of superimposed fabric that comprise at least two intermediate layers (5 and 7) made up of a 100% polyamide fabric with a bacteriostatic thread with metal ions. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

MULTILAYER FABRIC FOR THE MANUFACTURE OF PROTECTIVE MASKS AND

FILTERS FOR SUCH MASKS

OBJECT OF THE INVENTION

The invention, as expressed in the wording of the present specification, refers to a multilayer fabric for the manufacture of protective masks and filters for said masks that provides, to the function for which it is intended, advantages and characteristics, which are described in detail later.

The object of the present invention lies in a product consisting of a multilayer fabric that is distinguished by comprising, at least, five layers welded together by high frequency, where two of them, interposed between the other three as intermediate layers, are formed by a 100% polyamide fabric that includes bacteriostatic wire with metal ions, preferably silver, and can optionally be bacteriostatic wire with gold or copper ions, providing a material that protects against infectious organisms and limits the spread of infections, since silver, as well as gold or copper, attacks bacteria, fungi and viruses. Furthermore, in the case of manufacturing a facial protection mask with this material, advantageously, a dual mask is obtained that allows to unify in a single product the needs of EPI masks, PS type masks for the health sector, and hygienic masks. , complying at the same time with the requirements of the UNE-EN149: 2001 + A1 standard for Personal Protective Equipment and the EN 14683: 2019 AC: 2019 standard for surgical masks.

FIELD OF APPLICATION OF THE INVENTION

The field of application of the present invention is framed within the sector of the industry dedicated to the manufacture of materials for the manufacture of protective equipment, focusing particularly on the field of fabrics and fabrics for the manufacture of facial protection masks, including at the same time the field of the manufacture of filters for face protection masks.

BACKGROUND OF THE INVENTION

As is known, there are currently the following types of masks:

- Hygienic or barrier masks

- Surgical masks

- Self-filtering masks (ffp1, ffp2 and ffp3)

- Dual masks

- Hygienic or barrier masks are the most common. This type of mask is not considered a medical device or personal protective equipment (PPE), and is not designed to "protect against any risk", so it is not recommended for use in "situations involving exposure to dangerous agents", as indicated by the Ministry of Industry, Commerce and Tourism. However, in the context of the current crisis, they are intended, according to the recommendations of the Ministry of Health, to all those people without symptoms who are not likely to use surgical or filtering masks. "The objective of its use is to try to reduce the risk of transmission of the virus from the mouth and nose of the non-ill or asymptomatic user", explains the General Council of Pharmaceutical Colleges (CGCF), although always as a "complementary measure to others". There are, at this point, two types of hygienic masks:

- Non-reusable hygienic masks: these are governed by the UNE 0064-1 and UNE 0064-2 specification, the first for adults and the second for children. In this case, their very name indicates it: they are for single use.

- Reusable hygienic masks: these are governed by the UNE 0065 specification and exist for both adults and children. In this case, as their name suggests, they are reusable, although for them to be so, they must be manufactured with a series of materials that can be reused.

- Surgical masks, for their part, serve to prevent the transmission of infectious agents by the person who wears them, therefore, their use is recommended in people diagnosed with coronavirus, to minimize contagion to people who may approach, although like the previous ones they are a non-hermetic piece. These masks They are disposable (single use) and are not considered PPE either, because they do not provide a reliable level of protection against inhalation of particles, although they are considered a medical device (PS). Additionally, they can provide some protection against splashes of potentially contaminated fluids: these are surgical masks with IR marking. In addition to those diagnosed, they are those used by the personnel who accompany those affected to the relevant isolation areas; but like the previous ones, its effectiveness is not fully assured when it comes to eliminating the risk of infection.

- Self-filtering masks contain a microparticle filter, thanks to which they protect the wearer from inhaling certain environmental pollutants, such as pathogens, chemicals, antibiotics ..., although they do not protect against gases or vapors. These are considered PPE, and are classified based on their performance. As stated by the authorities, used correctly, "they provide an acceptable level of protection against inhalation of particles". In addition, depending on their performance, they have a recommended use or another:

- FFP1 masks: they have a minimum filtration efficiency of 78%, and a maximum internal leakage percentage of 22%. They are not recommended for medical use, and are often used against particles of inert material.

- FFP2 masks: in this case the minimum filtration is 92%, with a maximum internal leakage percentage of 8%. These masks are used against aerosols of low or moderate toxicity. According to Health, the recommendation is that health personnel who attend "in cases of investigation, probable or confirmed for infection by SARS-CoV-2 or people who enter the isolation areas wear, as part of their PPE, a of these "- failing that, a surgical one.

- FFP3 masks: the minimum filtration of this type of masks rises to 98%, while the percentage of leakage into the interior is only 2%. These are recommended for highly toxic aerosols. According to Health recommendations, these are the masks that health personnel who attend to situations in which aerosols are generated that favor contagion should be worn. As indicated by the CGCF, these would be cases of tracheal intubation, bronchoalveolar lavage or manual ventilation. Failing that, an FFP2 could be used.

These types of masks can be cleaned, as long as they are reusable: if so, they will be marked with the letter R, which implies that they can be used more than one work shift. Only the face fitting should be cleaned and disinfected, never the filter material.

- And, finally, dual masks, on the one hand, provide protection against bioaerosols to the person who wears them, and at the same time reduces the transmission of infectious agents from this same person to the work area. In this case, they must comply with the legislative provisions of EPI and PS. The dual-use mask is disposable - it must be thrown away after completing a certain task or after staying in a contaminated area - so it does not need to be washed or disinfected.

There are also masks with particle filters: considered PPE although not a medical device (PS), they are airtight face pieces that protect the person wearing them from inhaling dangerous particles. Used correctly, they provide an acceptable level of protection against inhalation of particles. These are also reusable, although only what is the mask is washed and disinfected, but not the filter.

The objective of the present invention is, therefore, to solve the deficiency that is verified, considering the above, that there is no mask on the market that is DUAL and that complies with the requirements of the UNE-EN149: 2001 + A1 standard. of Individual Protection and the EN 14683: 2019 AC: 2019 standard for surgical masks.

FFP masks are self-filtering masks that cover the nose, mouth, and chin. The acronym FFP comes from “Filteríng Face Piece”, and the numbering 1, 2 or 3 denotes the Nominal Protection Factor 4, 12 or 50 respectively.

FFP masks are typically made from TNT (Non-Woven Fabric). They use two types of TNT for the filter layers that make up the mask:

Non-woven fabric. TNT Spunlace, 80% Polyester / 20% Viscose.

Meltblown cloth. TNT Spunbond, 100% Polypropylene.

TNT does not have antibacterial, antiviral, and antifungal properties. It does not have the ability to inactivate the microorganism and prevent its reproduction.

This lack of properties means that the mask cannot be certified according to the EN 14683: 2019 AC: 2019 standard. They do not have a bacterial filtration efficiency of 98% (type II) according to this regulation.

Furthermore, current masks do not have bacteriostatic wire filters with silver, gold or copper ions.

The current masks have the type of PPE or the type of PS (Medical Device). They are not DUAL, they are not dual certified, and they do not have antibacterial, antiviral, and antifungal properties.

Today's masks are made mostly with TNT (non-woven fabric). There is no manufacture of heat-sealed masks with substitute materials for TNT.

The current masks when manufactured with TNT and heat sealed are not reusable for long cycles.

There are no self-filtering masks such as EPI FFP1, FFP2 and FFP3 / PS whose outer layer is customizable with drawings, stamping, serigraphy, etc.

On the other hand, there is no mask filter on the market that meets these characteristics.

Thus, and as a reference to the current state of the art, it should be noted that, at least by the applicant, the existence of any multilayer fabric for the manufacture of protective masks and filters for said masks, or any other invention of similar application, which presents technical and constitutive characteristics equal or similar to those presented herein.

EXPLANATION OF THE INVENTION

The multilayer fabric for the manufacture of protection masks and filters for said masks that the invention proposes is configured as the ideal solution to the aforementioned objective, the characterizing details that make it possible and that distinguish it conveniently included in the accompanying final claims to the present description.

Specifically, what the invention proposes, as noted above, is a multilayer fabric that, specifically intended for the manufacture of facial protection masks and / or the manufacture of filters, interchangeable or not, intended to be incorporated into protective masks. facial, is essentially distinguished by comprising, at least, five layers welded together by high frequency, two of which, interposed as intermediate layers, are formed by a 100% polyamide fabric that includes bacteriostatic thread with silver ions, optionally being able to be bacteriostatic wire with gold or copper ions.

More specifically, in a preferred embodiment of the invention, specifically an embodiment option for making a reusable mask, said fabric comprises five high-frequency welded layers (dielectric sealing or RF heat-sealing) of the following materials:

- A first (outer) layer of 100% polyester, preferably with waterproofing treatment and, in any case, with antibacterial treatment;

- a second layer of 100% polyamide with bacteriostatic wire with metal ions, preferably silver and, optionally, gold or copper;

- a third layer of 100% Polyamide with antibacterial treatment;

- a fourth layer identical to the second layer, that is, made of 100% polyamide with bacteriostatic wire with metal ions, preferably silver, but optionally gold or copper; and

- a fifth inner layer, that is, in contact with the skin of the user's face, made of 100% polyamide, preferably with a waterproofing treatment and, in any case, with an antibacterial treatment.

And, in another preferred embodiment of the invention, specifically an embodiment option for making a non-reusable non-woven fabric mask, the fabric in question also comprises five layers welded by high frequency (dielectric sealing or RF heat sealing) being made up of the following materials:

- a first layer or outer layer of TNT made up of 80% polyester and 20% viscose, preferably with waterproofing treatment and, in any case, with antibacterial treatment; - a second layer of 100% polyamide with bacteriostatic wire with metal ions, preferably silver and, optionally, gold or copper;

- a third intermediate layer of TNT composed of 100% polypropylene with antibacterial treatment;

- a fourth layer of 100% polyamide with bacteriostatic wire with metal ions, preferably silver and, optionally, gold or copper; and

- a fifth inner layer of TNT made up of 80% polyester and 20% viscose, preferably with waterproofing treatment and, in any case, with antibacterial treatment. With all this, the fabric of the invention, whether it is used to make a mask or to make filters, protects against infectious organisms and limits the spread of contagion. Silver attacks bacteria, fungi, and viruses. It attacks any microbe that is affected by this metal. Silver causes the outer capsule containing all the viral particles to break, and this causes the virus to inactivate and prevent its reproduction.

The great advantage of this mask or filter with silver thread is that it deactivates the virus as it passes through it or through its filters.

The mask is a self-filtering protective equipment (FFP1, FFP2, FFP3)

The mask can be reusable, in which case, in addition, it provides permanent freshness and is harmless to health and the environment.

The non-reusable mask guarantees biological safety as a medical device.

The dual mask is compatible for industrial use, healthcare use and civil use (pandemic).

The DUAL EPI + PS mask with antibacterial, antiviral and antifungal properties allows to guarantee the safety of its user to protect themselves and others. In the health sector, they avoid using a surgical mask on top of a self-filtering mask with or without a valve.

The mask protects against infectious organisms and limits the spread of contagion. Silver attacks bacteria, fungi, and viruses. It attacks any microbe that is affected by this metal. Silver causes the outer capsule that all viral particles have to break, and this causes the virus to inactivate and prevent its reproduction.

All the filters of the mask have antibacterial and / or waterproof treatment.

It can be made with substitute materials for TNT.

A self-filtering mask type EPI FFP1, FFP2 and FFP3 / PS - REUSABLE is manufactured whose outer layer is customizable with drawings, stamping, screen printing, etc. The layers that make up the mask are heat-sealed, offering the properties of an EPI + PS + antibacterial, antiviral and antifungal properties, and whose outer polyester layer can be fashionable or customized according to customer requirements.

The masks or filters can be made with inner layers with bacteriostatic thread with silver, gold or copper ions.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, the present specification is attached, as an integral part thereof, to a drawing in which, with an illustrative and non-limiting nature the following has been represented:

Figure number 1.- Shows a schematic representation in section of an embodiment of the multilayer fabric for the manufacture of protection masks and filters for said masks object of the invention, appreciating the different layers that it comprises as well as the arrangement of the themselves;

Figure number 2.- Shows a schematic view of a portion of an example of a mask made with the multilayer fabric of the invention, showing, among other details, the joint weld between them; and

Figure number 3.- Shows a plan view of an example of a filter made with the multilayer fabric of the invention, also showing the joint weld between its layers.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the aforementioned figures, and in accordance with the numbering adopted, an example of a non-limiting embodiment of the multilayer fabric of the invention can be observed, which comprises what is described in detail below.

Thus, as can be seen in said figures, the fabric (1) of the invention, especially applicable for the manufacture of masks (2) for facial protection and / or for the manufacture of filters (3), comprises, at least , five layers (4, 5, 6, 7 and 8) of superimposed fabric that, preferably perimeter joined to each other by means of a high-frequency welded joint (9), specifically by dielectric or heat-sealing, comprise at least two intermediate layers (5 and 7) made up of a 100% polyamide fabric with bacteriostatic thread with metal ions, preferably silver, and optionally gold or copper.

Preferably, in a preferred embodiment of the fabric (1) for making a reusable mask (2), the layers it comprises are:

- A first layer (4) or external layer of 100% polyester, with antibacterial treatment;

- a second intermediate layer (5) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper;

- a third central layer (6) of 100% Polyamide with antibacterial treatment;

- a fourth intermediate layer (7) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper ions; and

- a fifth internal layer (8) of 100% polyamide, with antibacterial treatment.

Most preferably, the first layer (4) is:

100% PES (Polyester) has a weight of 30 grams / m2 and an antibacterial waterproof treatment.

It is a customizable layer with transfer printing and / or textile sublimation. It complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012). Class I.

The second layer (5) of 100% polyamide with silver ions, has a weight of 45 grams / m2 and is preferably made of a type of "Xtrafresh" yarn from the manufacturer Nurel.

The threads do not contain nanomaterials (2011/696 / EU)

Long-lasting protection against bacteria

Industry standard protocol: ISO 20743: "DIN EN ISO 20743: 2007, Textiles - Determination of antibacterial activity of antibacterial products", International Organization for Standardization (2007). Equivalent to JIS L 1902: 2008.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012).

The third layer (6), made of 100% polyamide, has a weight of 40 grams / m2 and has an antibacterial treatment.

The fourth layer (7) of 100% polyamide with silver ions has a weight of 45 grams / m2 and is preferably made of a type of "Xtrafresh" yarn from the manufacturer Nurel.

The threads do not contain nanomaterials (2011/696 / EU)

Long-lasting protection against bacteria

Industry standard protocol: ISO 20743: "DIN EN ISO 20743: 2007, Textiles - Determination of antibacterial activity of antibacterial products", International Organization for Standardization (2007). Equivalent to JIS L 1902: 2008.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012) and

The fifth layer (8) of 100% polyamide has a weight of 30 grams / m2, and incorporates waterproofing and antibacterial treatment.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012). Class I.

Thus, the weight of the fabric layers (1) is preferably 190 grams / m2.

Furthermore, as already mentioned above, the bacteriostatic wire with silver ions can be replaced by bacteriostatic wire with gold or copper ions.

And, in another embodiment of the fabric (1) of the invention, specifically applicable for the manufacture of a non-reusable mask (2), it comprises the five layers that it comprises are made up of:

- a first layer (4) or external layer of TNT composed of 80% polyester and 20% viscose, with antibacterial treatment;

- a second intermediate layer (5) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper;

- a third central layer (6) of TNT composed of 100% polypropylene with antibacterial treatment;

- a fourth intermediate layer (7) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper ions; and

- a fifth internal layer (8) of TNT composed of 80% polyester and 20% viscose, with antibacterial treatment.

More specifically, each of the layers of the fabric (1) in this other variant of embodiment consists of:

- a first layer (4) TNT 80% polyester and 20% viscose that has a weight of 50 grams / m2 and waterproof and antibacterial treatment.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012). Class I.

- A second layer (5) of 100% polyamide with silver ions having a weight of 25 grams / m2, preferably being the "Xtrafresh" type of yarn from the manufacturer Nurel.

The threads do not contain nanomaterials (2011/696 / EU)

Long-lasting protection against bacteria

Industry standard protocol: ISO 20743: "DIN EN ISO 20743: 2007, Textiles - Determination of antibacterial activity of antibacterial products", International Organization for Standardization (2007). Equivalent to JIS L 1902: 2008.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012).

- a third layer (6) of 100% Polypropylene TNT with a weight of 50 grams / m2 and antibacterial treatment.

- a fourth layer (7) of 100% polyamide with silver ions. with a weight of 25 grams / m2, being preferably "Xtrafresh" type of yarn from the manufacturer Nurel.

The threads do not contain nanomaterials (2011/696 / EU)

Long-lasting protection against bacteria

Industry standard protocol: ISO 20743: “DIN EN ISO 20743: 2007, Textiles Determination of the antibacterial activity of antibacterial products ”, International Organization for Standardization (2007). Equivalent to JIS L 1902: 2008.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012) and

a fifth layer (8) of TNT 80% polyester and 20% viscose weighing 30 grams / m2 with antibacterial waterproofing treatment.

Complies with REACH, Oekotex and European Biocide legislation (European Regulation 28/2012). Class I.

Overall, this variant of the fabric (1) has a weight of 180 grams / m2.

Attending to figure 2, a portion of an example of mask (2) made with the fabric (1) of the invention is observed, where the joint (9) welded by high frequency is observed with which the different perimeter are joined together. layers comprising, also appreciating the area of incorporation of a nose clip (10), a protective sponge (11) as well as two welding points (12) for the ends of the rubber bands to hold the mask.

In figure 3, on the other hand, an example of a filter (3) made with the fabric (1) of the invention is observed, where the joint (9) welded by high frequency is also observed with which the different layers it comprises.

Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any expert in the field understands its scope and the advantages that derive from it.

Claims (10)

1. - Multilayer fabric for the manufacture of protection masks and filters for said masks, characterized by comprising at least five layers (4, 5, 6, 7 and 8) of superimposed fabric that comprise at least two intermediate layers ( 5 and 7) made up of a 100% polyamide fabric with bacteriostatic thread with metal ions. 2. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to claim 1, characterized in that it comprises two intermediate layers (5 and 7) of 100% polyamide with bacteriostatic thread with silver ions. 3. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to claim 1, characterized in that it comprises two intermediate layers (5 and 7) of 100% polyamide with bacteriostatic thread with gold ions. 4. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to claim 1, characterized in that it comprises two intermediate layers (5 and 7) of 100% polyamide with bacteriostatic wire with copper ions. 5. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to any of the preceding claims, characterized in that for the manufacture of a reusable mask (2), the layers that comprise are: - a first layer (4) or outer layer of 100% polyester, with customizable antibacterial treatment with transfer printing and / or textile sublimation; - a second intermediate layer (5) of 100% polyamide with bacteriostatic wire with silver, gold or copper ions; - a third central layer (6) of 100% Polyamide with antibacterial treatment; - a fourth intermediate layer (7) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper ions; - a fifth internal layer (8) of 100% polyamide, with antibacterial treatment. 6. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to claim 5, characterized in that the first layer (4) 100% polyester has a weight of 30 grams / m2 and a waterproofing and antibacterial treatment; the second and the fourth layers (5, 7) of 100% polyamide with bacteriostatic yarn have a weight of 45 grams / m2; the third layer (6) of 100% polyamide has a weight of 40 grams / m2 and has an antibacterial treatment; and the fifth layer (8) of 100% polyamide has a weight of 30 grams / m2, and incorporates waterproofing and antibacterial treatment. 7. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to any of claims 1 to 4, characterized in that, for the manufacture of a non-reusable mask (2), the layers that comprise are: - a first layer (4) or external layer of TNT (non-woven fabric) composed of 80% polyester and 20% viscose, with antibacterial treatment; - a second intermediate layer (5) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper; - a third central layer (6) of TNT composed of 100% polypropylene with antibacterial treatment; - a fourth intermediate layer (7) of 100% polyamide with bacteriostatic wire with silver ions and, optionally, gold or copper ions; and - a fifth internal layer (8) of TNT composed of 80% polyester and 20% viscose, with antibacterial treatment. 8. - Multilayer fabric for the manufacture of protection masks and filters for said masks, according to claim 7, characterized in that the first layer (4) TNT 80% polyester and 20% viscose has a weight of 50 grams / m2 and waterproof treatment and antibacterial; the second and fourth layers (5, 7) of 100% polyamide with bacteriostatic yarn have a weight of 25 grams / m2; the third layer (6) of 100% polypropylene TNT has a weight of 50 grams / m2 and has an antibacterial treatment; and the fifth layer (8) of TNT 80% polyester and 20% viscose has a weight of 30 grams / m2 with antibacterial waterproofing treatment. 9. - Multilayer fabric for the manufacture of protective masks and filters for said masks, according to any of the previous claims, characterized in that the layers (4, 5, 6, 7 and 8) that it comprises are joined to each other perimeter with a joint (9) welded by high frequency. 10. Multilayer fabric for the manufacture of protective masks and filters for said masks, according to claim 9, characterized in that the layers (4, 5, 6, 7 and 8) that It comprises are joined to each other perimeter with a joint (9) welded by dielectric sealing or heat sealing.