SK2122020U1 - Respirator - Google Patents

Abstract

The respirator comprises an outer part (1) of the mask, at least one filter insert (2), a face part (3) of the mask, a clamping tape (4) and a head part (5) of the mask, the inner surfaces of the outer part (1) of the mask and the face part ( 3) the masks are filled with a grid (8), and a filter insert (2) is inserted between the face part (3) of the mask and the outer part (1) of the mask, the face part (3) of the mask fitting into the outer part (1) of the mask. , the face part (3) of the mask has raised edges around the entire circumference for adhering the face part (3) of the mask to the wearer's face. The outer part (1) of the mask comprises openings (6) of the outer part of the mask for threading the clamping tape (4) and the head part (5) of the mask comprises openings (7) of the head part of the mask for fixing and tensioning the clamping tape (4).

Description

SK 212-2020 U1

Field of technology

The technical solution concerns a respirator - a device for protection against inhalation of hazardous material from the surrounding environment, which also serves as protection against exhalation of hazardous material into the surrounding environment.

Prior art

Respirators are used by a wide range of industries, e.g. medical and pharmaceutical industries, defense and public security services (such as the military, fire-fighting, law enforcement activities), oil and gas industry services, manufacturing industries such as the automotive, chemical, metalworking, food production and beverages, woodworking, pulp and paper production. Respirators are also used in construction, agriculture and forestry, the energy sector, shipbuilding and the textile industry.

Most respirators are based on creating a good seal between the body of the respirator and the user's face. Test procedures have been developed for the use of respirators to ensure that the respirator is appropriate for the user and the application, and that the respirator is capable of providing an adequate seal. Insufficient respirator sealing can have a negative effect on the overall filtration efficiency of the respirator, reducing it by up to 65%.

Qualitative testing of respirators usually subjects the respirator wearer to an aerosol-containing atmosphere.

Respirators usually have the following main components: a high pressure air cylinder (e.g., 2,200 psi to 4,500 psi), a pressure gauge, a regulator, and an inhalation connection (mouthpiece or full face mask). These parts are connected and mounted on a carrying frame or harness with adjustable shoulder straps and a belt so that it can be worn on the back.

There are two basic types of respirators: an open-circuit respirator and a closed-circuit respirator.

Industrial open-circuit respirators are filled with filtered compressed air. Compressed air passes through the regulator, inhales and exhales from the circuit, which quickly drains the air supply. Air cylinders are most often made of aluminum, steel or composite materials.

A closed circuit is typical of respirators that use filters and recirculate exhaled gas. This type of respirator is used when a long-term supply of breathing gas is required, for example when working in mines or long tunnels.

A closed-loop respirator is most often a disposable protective device and is normally designed for a maximum of 8 hours of use. Without the possibility of repeated use resp. filter replaceability is a relatively expensive mandatory work equipment.

Respirators can be of various types - for example, respirators designed to half-cover the face are known, these devices cover only the lower half of the face, including the nose and mouth.

Half-face respirators are only effective in environments where contaminants are not toxic to the eyes or facial area. For example, this type of respirator can be used for spray painting. A full face mask should be worn when working with chlorine gas.

For example, the FFP2 HY8620 Respirator without valve from Zvarex is currently known and available on the market, https://zvarex.sk/respiratory-triedy-ffp2/397-respirator-ffp2-hy8620-bez-ventilu.html.

This respirator does not allow sterilization of the device and is therefore not intended for re-use. It is only available in one size and it is not possible to use different types of filters, depending on the user's needs, with different protection requirements.

As standard, respirators are offered in one universal size, often without an ergonomic shape, which causes problems when worn for a longer period of time. In case of insufficient contact with the face, the respirator may have low effectiveness, which is important especially in the case of protection against infection, resp. when inhaling air with dangerous particles.

The essence of the technical solution

The shortcomings of hitherto known respirators are eliminated by the respirator according to this technical solution.

The respirator has the character of an oronasal mask, i. j. it covers only a part of the wearer's nose and mouth.

The main purpose of the respirator is to provide clean breathable air in the mask and to filter the exhaled air of the mask wearer.

SK 212-2020 U1

The respirator contains the following parts: the outer part of the mask, at least one filter insert, the face part of the mask, the clamping tape and the head part. The outer part of the mask, the filter insert and the face part of the mask have a mutually compatible shape designed such that at least one filter insert is inserted between the face part of the mask and the outer part of the mask, the face part of the mask fitting into the outer part of the mask. The inner surfaces of the outer part of the mask and the face part of the mask are filled with a grid, the face part of the mask having raised edges around the entire circumference for the face part of the mask to adhere to the wearer's face. The outer portion of the mask includes openings in the outer portion of the mask for threading the clamping strap, and the head portion of the mask includes openings in the header portion of the mask for securing and tensioning the clamping strap.

The number of holes of the outer part of the mask may be, for example, 8 and the number of holes of the head part of the mask may be, for example, 11.

The filter insert may be one or more, corresponding in size or size to the face of the mask. The filter element in the respirator is replaceable, the type of filter element that is needed according to the current situation can be used, for example it can have a larger number of layers. The filter material that can be used in this respirator provides a degree of protection of FFP1, FFP2 or FFP3.

In general, the degree of protection FFP2 is applicable against COVID-19.

The advantage of the respirator is that the outer part of the mask, the face part of the mask, the clamping tape and the head part of the mask can be disinfected, even repeatedly, which ensures repeated safe use of the respirator.

The head part of the mask has three arms arranged in a Y-shape to each other, the two side arms having 3 horizontal holes in the head part, and the upper arm having 3 horizontal holes in the head part and 2 vertical holes in the head part perpendicular thereto.

The respirator is secured to the wearer's head with clamping tape which is flexibly attachable through holes on the outside of the mask and holes on the head of the mask.

The clamping tape is threaded through 2 perpendicular vertical holes of the mask head in its upper arm, and is threaded through the upper and lower holes of the outer part of the mask, the clamping tape being threaded and clamped in the horizontal holes of the mask head in its two side arms for tight adhesion. respirator to the wearer's face.

The air in the breathing is drawn into the respirator based on the respiratory activity of the respirator wearer, which causes a slight negative pressure. When inhaling, the air passes through the filter element into the airways and exits in the same way when exhaling. The inhaling and exhaling air path ensures a sufficient flow of filtered air thanks to a sufficiently large filter insert. The presence of an exhalation valve is not necessary due to the sufficient permeability of the exhaled air through the filter material.

The shape of the outer part of the mask and the facial part of the mask is ergonomic, and is designed in male (L / XL) or female (S / M). Such variation ensures easier breathing and effective fitting of the respirator on the user's face, taking into account the specifics of the facial area of men and women.

The respirator is designed for respiratory protection using the protection filter FFP1, FFP2, alt. FFP3, and offers the maximum possible level of protection against pollutants in the breathed air. At the same time, it serves to protect the environment (primarily people) from an infected person wearing a respirator by filtering out exhaled air. The respirator according to the presented solution is also suitable as a protective personnel aid against COVID-19 infection.

This respirator can be used for more than the standard 8 hours. At the same time, it can be used repeatedly, thanks to the replaceable filter insert. The mask itself (without filter insert) is disinfectable. The long-term applicability of the mask also results in a lower environmental burden. Repeated use of the mask will reduce the overall cost of protection on the part of the user.

The great advantage of a respirator is that it does not require an exhalation valve, which in conventional devices allows the exhaled air to exit the respirator. The respirator is designed as a two-way mask, it filters both inhaled and exhaled air, thus protecting the person wearing the respirator and the people around it.

Any type of suitable filter can be used in the respirator, its selection depends on the specific conditions of use and the degree of protection required.

It is also possible to use, for example, filters which provide protection against contamination in the form of solid elements or liquid elements in the ambient air.

The respirator according to the present solution has several advantages over competing products:

- the use of thermoplastic copolyester on the facial part of the mask ensures a solid construction, at the same time flexibility, durability and strength at high temperature

- higher durability, long-term usability

- the filter, which is part of the respirator, does not require the presence of an exhalation valve

- the filter, which is part of the respirator, depending on the cleanliness of the environment, it is possible to use up to 20 hours instead of the standard 8 hours.

- reusability - filter replaceability

- applicability of different types of filters depending on the need for the degree of protection, also filters with multiple layers - applicability of different number of filters depending on the need for the degree of protection

SK 212-2020 U1

- possibility of product sterilization

- a larger number of holes on the clamp ensures better and safer clamping

- adjustable clamping strap

- 2 mask sizes - male and female.

Overview of figures in the drawings

FIG. 1a shows a view of the individual parts of the respirator separated from each other, in an exploded state

FIG. 1b shows a view of a respirator having the outer part of the mask connected to the face part of the mask and between which at least one filter insert is placed.

FIG. 1c shows a view of a respirator having the individual parts of the respirator separated from each other and having 2 filter inserts

FIG. 2 shows the outer part of the mask with holes when viewed from the inside

FIG. 3 shows the outer part of the mask with holes when viewed from the outside

FIG. 4 shows a facial part of the mask with a grid when viewed from the outside

FIG. 5 shows the face part of the mask with a grid when viewed from the inside

FIG. 6 shows a view of a respirator having the outer part of the mask connected to the face part of the mask and between which at least one filter insert is placed, the clamping tape being threaded through the openings of the outer part of the mask and the openings of the upper arm of the mask part. through the holes in the lower arms of the head of the mask

Examples of embodiments

Example 1

The respirator comprises an outer part 1 of the mask, one filter insert 2 of the FFP1 protection filter, a face part 3 of the mask, a clamping tape 4 and a head part 5 of the mask.

The outer part 1 of the mask, the filter insert 2 and the face part 3 of the mask have a mutually compatible shape, a filter insert 2 being inserted between the face part 3 of the mask and the outer part 1 of the mask, and the face part 3 of the mask has a shape which fits into the outer part 1 of the mask. .

The outer part 1 of the mask comprises openings 6 for passing the clamping tape 4, and the head part 5 comprises openings 7 for fixing and tensioning the clamping tape 4.

The inner surfaces of the outer part 1 of the mask and the face part 3 of the mask are filled with a grid 8, as can be seen in FIG. 1-6. The display of the grid 8 is only one of the possibilities of the shape of the grid, the grid can also be thicker and can have a different shape than in the figures.

The density and shape of the grid 8 proposed in the figures ensure optimal air passage and at the same time fixing of the filter material. Denser grating may result in lower airflow, and thinner grating will not provide sufficient protection for the filter material.

The edges of the face part 3 of the mask protrude along its entire circumference to adhere the face part 3 of the mask to the wearer's face.

The filter insert 2 is replaceable, and corresponds in its shape and size to the face part 3 of the mask or is larger therefrom. Any type of other suitable filter element 2 can also be used in the oronasal mask, which depends on the specific hazardous elements from which the respirator is to protect and the degree of protection required. The filter insert 2 provides protection against contamination in the form of solid elements or liquid elements in the ambient air.

The advantage of the present solution is that the outer part 1 of the mask, the face part 3 of the mask, the clamping tape 4 and the head part 5 of the mask are disinfectable, even repeatedly.

The shape of the outer part 1 of the mask and the face part 3 of the mask is ergonomic, and is designed in size L / XL (male version) or size S / M (female version).

The number of holes of the outer part 1 of the mask is 8 and the number of holes of the head part 5 of the mask is 11.

The head part 5 of the mask has three arms arranged in a Y-shape to each other, the two side arms having 3 horizontal holes 7 of the head part, and the upper arm having 3 horizontal holes 7 of the head part and 2 perpendicular vertical holes 7 of the head part.

The clamping tape 4 is threaded through 2 perpendicular vertical holes 7 of the mask head part in its upper arm, and is threaded through the upper and lower holes 6 of the outer part of the mask, the clamping tape 4 being threaded and clamped in the horizontal holes 7 of the mask head part in its two arms. side arms to tightly adhere the respirator to the wearer's face.

SK 212-2020 U1

Example 2

A respirator as in Example 1, which has a clamping tape 4 made of silicone microporous rubber and a mask head 5 made of polyethylene.

The outer part of the mask 1 and the face part of the mask 3 are made of a thermoplastic copolyester, e.g. from Arnitel.

Amitel® is a high performance thermoplastic copolyester (TPC) that offers a unique combination of flexibility, durability and high temperature strength and has excellent processing properties.

In industries, Amitel® is an increasingly lighter, smarter and greener alternative to conventional rubbers, which reduces the environmental impact and, ultimately, the cost of the system.

Amitel has a wide range of hardnesses that are able to replace rubbers, metals, leather and other thermoplastics. Amitel provides excellent chemical, heat and wear resistance along with the ability to recycle.

In this case, the filter insert 2 is made of OFIL, which is a white nonwoven fabric, 100% polypropylene, a hydrophobic meltblown nonwoven fabric made of fine interwoven polypropylene fibers. It is characterized by excellent filtration, insulation and absorption capabilities, smooth surface. Due to the composition of the filter medium, the respirator does not require the presence of an exhalation valve.

The clamping tape 4 is made of silicone microporous rubber, maintains a constant tension, and reduces the pressure on the wearer's head.

The head part 5 of the mask is made of polyethylene.

Example 3

The respirator has the same parts as in Example 1.

The filter material that can be used in the respirator provides a degree of protection FFP1, FFP2 or FFP3. In general, the degree of protection FFP2 is applicable against COVID-19.

In this example, one replaceable filter insert 2 is used, which is certified for degree of protection FFP2.

The respirator in this kit with one filter cartridge 2 certified for FFP2 protection can be used as protection against COVID-19.

Example 4

The respirator has the same parts as in Example 1.

The filter material that can be used in this respirator provides a degree of protection of FFP1, FFP2 or FFP3. In general, the degree of protection FFP2 is applicable against COVID-19.

In this example, two replaceable filter inserts 2 were used.

The respirator in this set with two filter inserts 2 can be used as protection against COVID19.

Filter cartridge 2 has the following parameters:

The filter material is 100% polypropylene - non-woven fabric of the Meltblown OFIL white type.

The fabric has been tested with the following results:

1 / VUTCH Žilina, health safety:

• Formaldehyde content, pentachlorophenol content, pH of aqueous extract, content of organic compounds, content of polycyclic aromatic hydrocarbons; complies with the result; protocol number 00109/119/2020 2 / VUBP Prague:

• Determination of respiratory resistance (inspiratory and expiratory)

- requirement for respiratory resistance max 70 Pa for FFP2 at 301 / min. - result 39 Pa at 95 1 / min. demand max 240 Pa for FFP2 - result 130 Pa;

- exhalation resistance at 1601 / min. max. 300 Pa - result 258 Pa

Aerosol penetration determination (NaCl test) - requirement for FFP2 at 95 1 / min. max 6%

- result for bilayer 3.47% and 5.41%

The results of the testing of the filter insert 2 are still incomplete, the testing is continuing, and it is assumed that the final results will be obtained in the first half of 2021.

Industrial applicability

The respirator finds use mainly in healthcare and industry as a protective work aid. It can be used in operations with dangerous resp. polluted air such as battery manufacturing, pharmacy, shipbuilding, soldering and welding, chemical manufacturing, construction, iron and steel casting, and other areas of industrial production.

SK 212-2020 U1

If one or more filter cartridges with an adequate degree of protection are used, the respirator is suitable for use against COVID-19.

Claims (13)

SK 212-2020 U1 PROTECTION REQUIREMENTS A respirator, characterized in that it comprises an outer part (1) of the mask, at least one filter insert (2), a face part (3) of the mask, a clamping tape (4) and a head part (5) of the mask, the inner surfaces of the outer part (1) the mask and the face part (3) of the mask are filled with a grid (8), and a filter insert (2) is inserted between the face part (3) of the mask and the outer part (1) of the mask, the face part (3) of the mask having its shape fits into the outer part (1) of the mask, the face part (3) of the mask has raised edges around the entire circumference for adhering the face part (3) of the mask to the wearer's face, and the outer part (1) of the mask comprises openings (6) of the outer part of the mask for slipping of the clamping tape (4), and the head part (5) of the mask comprises openings (7) of the head part of the mask for fixing and tensioning the clamping tape (4). Respirator according to claim 1, characterized in that the filter insert (2) is replaceable. Respirator according to claim 1, characterized in that the filter insert (2) has the same size as or larger than the face part (3) of the mask. Respirator according to claims 1-3, characterized in that the filter insert (2) is certified for degree of protection FFP1, FFP2 or FFP3. Respirator according to claims 1-4, characterized in that the number of filter inserts (2) is 2. Respirator according to claim 1, characterized in that the outer part (1) of the mask and the face part (3) of the mask are made of a thermoplastic copolyester. Respirator according to claim 1, characterized in that the outer part (1) of the mask, the face part (3) of the mask, the clamping tape (4) and the head part (5) of the mask are disinfectable, even repeatedly. Respirator according to claim 1, characterized in that the outer part (1) of the mask and the face part (3) of the mask have an ergonomic shape and are designed in size L / XL or size S / M. Respirator according to claim 1, characterized in that the clamping tape (4) is made of silicone microporous rubber and the head part (5) of the mask is made of polyethylene. Respirator according to claim 1, characterized in that the number of holes (6) of the outer part of the mask is 8 and the number of holes (7) of the head part of the mask is 11. Respirator according to claim 1, characterized in that the head part (5) of the mask has three arms arranged in a Y-shape with each other, the two side arms having 3 horizontal holes (7) of the head part and the upper arm having 3 horizontal holes (5). 7) of the head part and 2 perpendicular openings (7) of the head part perpendicular thereto. Respirator according to claim 1 and claim 11, characterized in that the clamping tape (4) is passed through 2 perpendicular vertical holes (7) of the head part of the mask in its upper arm, and is passed through the upper and lower holes (6) of the outer part of the mask, the clamping tape (4) being threaded and clamped in the horizontal openings (7) of the head part of the mask in its two side arms to tightly adhere the respirator to the wearer's face. A respirator according to claim 4 or 5, characterized in that it is intended for use as a protective aid against COVID-19. 5 drawings