CN113521582A - Device for improving protective effect of mask or nose mask or airflow expanding bag thereof by gap filtration - Google Patents

Abstract

The invention provides an apparatus for improving the protection effect of a mask or a nose mask or an airflow expansion bag thereof by utilizing a gap filtration method, wherein the mask body of the mask or the nose mask or the wall of the airflow expansion bag is provided with a filtration and ventilation layer, and the main body of the apparatus comprises an airflow limiting thin film layer covering the outer side of the filtration and ventilation layer; the airflow limiting thin film layer is provided with a plurality of separation supporting columns which are distributed at multiple points with the filtering and ventilating layer, and gaps communicated with the airflow of the external environment are formed and kept; the distance between the gaps is a small enough part, so that the air directly communicated with the external environment is mainly driven by the respiration of a wearer at the small enough part of the gaps, and the proportion of the tangential motion component of the airflow on the outer surface of the filtering and ventilating layer along the gap wall is increased; the periphery of the air flow limiting film layer is provided with connecting parts. The air-permeable mask utilizes the principle of a gap filtering method, can improve the protection effect of the mask or the nose mask or the airflow expansion bag thereof, or can properly reduce the material requirement on the air-permeable filtering layer to a certain extent on the premise of certain protection performance. It can also prevent the fogging of glasses or goggles after wearing a mask or a nose mask.

Description

Device for improving protective effect of mask or nose mask or airflow expanding bag thereof by gap filtration

Technical Field

The present invention relates to an apparatus for improving the protective effect of a mask, a nose mask or an airflow extension pack thereof by a gap filtration method.

Background

When respiratory diseases are propagated in the world, the mask with good protective performance is difficult to supply to all people in need of the world in a large amount in time due to the limitation of productivity and materials, so that epidemic situations are difficult to control effectively in certain countries and regions. People in areas with serious epidemic situations can only deal with the situation by using self-made simple masks such as clothes, bed sheets and the like, but the protective performance is very limited, and the penetration rate of droplets and aerosol is very high. Even if a standard medical mask exists, the protection performance of the medical mask is greatly reduced due to the fact that the medical mask is electrostatic adsorption and physical interception, and when the medical mask cannot be replaced due to overlong use time, static electricity disappears or fibers are aged. It is therefore desirable to provide a method or apparatus for providing persons in an epidemic situation with an easily manufactured or readily available means for further enhancing the protective effectiveness of a mask or nose.

In addition, even if the mask reaches a certain standard, the mask only filters pollutants at a certain probability, such as N95, the filtering rate can reach 95%, the filtering rate of a common medical mask is usually below 60%, and the filtering rate of a common mask is usually below 30%, so that the protection effect can be further improved by a convenient, simple and cheap method, and the actual filtering rate is improved.

In addition, the airflow expansion bag disclosed in patents such as the nose mask with the airflow expander and the like invented by the inventor is also a technical scheme which can be used for epidemic situations in an emergency, and the airflow expansion bag can be combined with the invention to further improve the protection effect.

Disclosure of Invention

In order to overcome the problems of insufficient output of the high-protection-performance mask, inferior protection performance of the mask and the nose cover, and the like, the invention provides a device for improving the protection effect of the mask or the nose cover or the airflow expansion bag thereof by utilizing a gap filtration method.

One of the technical schemes adopted by the invention is as follows: the utility model provides an utilize clearance filtration method to improve the apparatus of the protective effect of gauze mask or nose cup or its air current expansion package, the wall of the cover body of gauze mask or nose cup or the air current expansion package of gauze mask or nose cup has the ventilative layer of filtration that has the filtered gas function, characterized by: the main body of the appliance comprises an airflow limiting thin film layer covering the outer side of the filtering and ventilating layer; the airflow limiting thin film layer is provided with a plurality of separation supporting columns which are distributed at multiple points with the filtering and ventilating layer, and gaps communicated with the airflow of the external environment are formed and kept; the periphery of the air flow limiting film layer is provided with connecting parts.

In this case, when the gap has a sufficiently small portion, the gas in direct communication with the external environment is generally driven by the wearer's breathing action mainly at the sufficiently small portion of the gap, so that the proportion of the tangential movement component of the gas flow along the gap wall on the outer surface of the filter and breathable layer is increased, and the gap can be better utilized to improve the protection effect. The inner surface of the gas flow defining film layer or/and the surfaces of the separation support pillars may be electrostatically charged. The air flow limiting film layer may be a polyethylene layer or a polypropylene layer. The air flow restricting film layer may be made to contain a liquid impervious layer. The separation support columns may be provided as rubber beads or rubber strips. The plurality of spaced apart support columns may be one or more pieces of a flat sponge having good air permeability, or the plurality of spaced apart support columns may be a plurality of granules or strips of sponge material. The surface of the separation support may be provided with an adhesive substance to make it adhere to the filter breather layer. A plurality of the devices may be connected by intermittent connecting lines in a roll that is self-detaching by the user. The air flow restricting film layer may be provided with portions covering a certain skin area in addition to the left and right sides of the mask or nose mask. The air flow may be confined to the film layers on the left and right sides, or to form a film tie that can be secured to the head, or to form a film ear loop that can be secured to the ear. The gas flow restricting film layer may also have an overhanging elongate film beneath the mask body of the oral or nasal mask. A plurality of pellets or strips may be sprayed or painted or stamped by the air-flow defining film layer or material thereof; the surface of the particles or the strips is sticky, or the surface of the airflow limiting film layer is sticky; adhering the airflow-defining film layer and the pellets or strips to each other to form the partition supports, etc.

Thereby can make gauze mask or nose cup or its air current expansion package obtain better protective effect, perhaps, can reduce to a certain extent under the prerequisite of certain protective effect and filter the material requirement on ventilative layer. The mask or nose cover can be a plane, a cup shape, or a special curved surface, or any mask or nose cover such as a medical mask, a cotton cloth, a cotton gauze mask, a self-made mask, and the like. The main body of the filtering and ventilating layer can be melt-blown cloth, or non-woven cloth, or a polymer film, or gauze, or even clothes or bed sheet fabrics in emergency application. The airflow expansion bag of the mask or the nose mask can be the airflow expansion bag in the technical scheme disclosed in patents such as the nose mask with the airflow expander invented by the inventor, and the like, and the airflow expansion technical scheme of the similar mask or nose mask is not excluded. The coverage may generally refer to a line-of-sight coverage from the front with an air gap in between. The sufficient size can be different according to the air pressure drop and the respiration of the filter material, the value can be generally larger than 0 mm and smaller than 20 mm, the air resistance is increased when the value is too small, and the filtering effect of the gap is obviously reduced when the value is too large. The total area of the gap peripheral openings is generally not smaller than the total area of the orifices of the two nostrils so as not to increase the breathing resistance. Preferably, the total area of the gap peripheral opening is larger than or equal to the total area of the orifices of the two nostrils. The air flow-restricting film layer may be a non-breathable plastic film, a breathable nonwoven fabric having a certain air resistance, or the like, which may separate or obstruct the air flow restricting the external environment. The air flow limiting film layer only needs one film layer, and other fabrics and the like are possible besides the film layer. The connecting part can be various belts, clamps, stickers, belts with clamps, and the like.

The invention provides a gap filtering method: the air flow limiting thin film layer is arranged in front of the filtering and air-permeable layer to form a gap, the distance between the gaps is small enough, so that air directly communicated with the external environment is mainly driven by the respiration of a wearer at the small enough part of the gap, the proportion of the tangential motion component of the air flow on the outer surface of the filtering and air-permeable layer along the gap wall is increased, and a better air filtering and protecting effect is obtained by utilizing the gap. The principle is as follows: firstly, the air flow can be used for limiting the external matters in the equal gaps of the thin film layer to block larger particle pollutants in the external environment to a certain extent; secondly, by utilizing the gap, the component of the gas on the outer surface of the filtering and ventilating layer moving along the tangential direction can be increased, the path of the pollutant reaching the filtering and ventilating layer is prolonged, the inner surface of the film layer or/and the gap contents such as gap supporters can be limited by the airflow to block or adsorb the pollutant, and at the moment, the gap contents are preferably electrified with static electricity; and thirdly, when the pollutants reach the filtering and ventilating layer, the air flow limiting thin film layer generates an air flow limiting effect, so that the air flow contacts the outer side surface of the filtering and ventilating layer in a direction which is closer to the tangential direction of the ventilating layer but not in the normal direction, thereby increasing the equivalent thickness of the air passing through the filtering and ventilating layer or increasing the filtering path of the air, or reducing the equivalent pore diameter, increasing the probability of the pollutants being captured by the filtering and ventilating layer, and further obtaining a better protection effect by utilizing the gap filtering method provided by the text. The air resistance of the gap is generally less than the air resistance of the filter breather layer. Typically, the spacing of the gaps is much larger than the diameter of the contaminants. The spacing of the gaps is generally small enough that the predominant airflow in the gaps is largely driven by respiration. The invention is especially significant when the output of the high-grade filter material is insufficient or is difficult to obtain in time.

The emergency manufacturing method of the invention comprises the following steps: in emergency, the electrostatic plastic film can be manufactured by the friction electrification principle; the particle can be made of baked charcoal, or made of solidified silicon rubber, or made of flat sponge, distributed and adhered with plastic film to form gap support; the electrostatic plastic film with the gap support covers a cotton cloth or cotton yarn mask or various masks which need long time and are difficult to replace, and four corners of the electrostatic plastic film are stuck or clamped on the mask to form the gap; or, the preservative film is used as the main body of the airflow limiting thin film layer, after the gap support is added, the two sides of the preservative film are cut into two side laces or earrings which can be fixed on ears or heads, and the preservative film is worn outside the mask to form the gap. In principle, the filtering and air-permeable layer needs to achieve a certain level of protection effect to correspond to a certain application occasion, and the probability of improving a certain protection effect can be increased on the basis. If not urgent and not optional, the inventors neither suggest applying the invention in applications beyond the level of protection of the filter-air-permeable layer itself, nor do they suggest making the invention home.

The plurality of separation support columns can be connected in any mode in a multi-way ventilation mode, for example, a porous object or a net object, a tubular object, a spiral object or a spiral-like object which is formed by the plurality of separation support columns in an integral mode, or a thin strip-shaped object which extends in any direction in a three-dimensional mode and can support a certain three-dimensional space can be formed. If the plurality of separation support columns are integrated, the integral air resistance of the separation support columns is smaller than that of the filtering air-permeable layer and the airflow limiting film layer. For example, the plurality of spaced apart support columns may be a piece of flat sponge having good air permeability. For another example, the plurality of separation support columns may not be directly connected, and a plurality of colloidal particles or adhesive tapes may be distributed between the gaps without being directly connected to each other.

Preferably, the inner surface of the gas flow limiting film layer or/and the surface of the separation support column are electrostatically charged. Therefore, pollutants in the gap can be better adhered, the protective effect of the mask or the nose mask or the airflow expansion bag thereof is further improved, or the requirement on the material of the filtering breathable layer can be further reduced on the premise of certain protective effect.

Preferably, the air flow limiting film layer is a polyethylene layer or a polypropylene layer. Thereby being low in cost, convenient to produce and widely available. For example, it is a wrap film or the like.

Preferably, the air flow restricting film layer comprises a liquid impermeable layer. Thereby the outer surface of the mask or the nose cover or the airflow expansion bag thereof has the function of preventing liquid seepage, and the mask or the nose cover or the airflow expansion bag thereof has the medical standard.

Preferably, the separation support columns are rubber particles or rubber strips. Thereby being low in cost, convenient to produce and widely available. Such as silicone, rubber, latex, and the like. Preferably silica gel particles, which can be in direct contact with the skin.

Preferably, the plurality of pellets or strips are sprayed or painted or stamped by spraying or painting or stamping the air flow defining film layer or material thereof; the surface of the particles or the strips is sticky, or the surface of the airflow limiting film layer is sticky; adhering the air flow-defining film layer and the pellets or strips to each other to form the separation support.

Thus, a method for easily producing the device can be obtained. For example, the device may be cut from a web of the air-flow limiting film material after the spraying or painting or embossing and adhering is complete, or may be torn into a suitable size by the user; it is also possible to start adding the separation support after the air flow limiting film layer has been cut to size. For example, the plurality of particles or strips can be heated to a surface fusion state, or the airflow limiting film layer is heated to the surface fusion state, then the airflow limiting film layer is sprayed or smeared or pressed, and a cooling facility is arranged at the airflow limiting film layer to rapidly cool the adhered joint so as to lose viscosity. For another example, the plurality of granules or strips may be mixed with an adhesive, or the adhesive may be added to the airflow limiting film, and then the plurality of granules or strips may be sprayed or painted or pressed on the airflow limiting film material, and the airflow limiting film layer may have a drying device to rapidly dry the adhered joints or react with air to lose viscosity. The tack may also not disappear or disappear incompletely.

The granular materials or the strip-shaped materials can be colloidal particles or rubber strips, and also can be granular materials or strip-shaped materials of sponge and the like.

Preferably, the plurality of separation supporting columns are one or more than one piece of flat sponge with good air permeability, or the plurality of separation supporting columns are a plurality of granules or strips of sponge material. Thereby being low in cost, convenient to produce and widely available. One flat sponge body can be a macroscopic flat surface or a macroscopic flat surface body, and can also be a macroscopic flat surface or a macroscopic flat surface body which is provided with a plurality of macroscopic holes or grids and the like. The sponge can be natural sponge or artificial sponge synthesized by various processes.

Preferably, the surface of the separation support is provided with adhesive substances so that the separation support can be adhered to the filtering and ventilating layer. So that the structure of the gap can be made more stable. The adhesive substance can be weak-adhesive medical nontoxic self-adhesive which can be adhered and separated for many times, so that the adhesive substance can be repeatedly used for many times.

Preferably, a plurality of said utensils are connected by intermittent connecting lines in a roll which is self-detaching by the user. Thereby facilitating production, use and storage.

Preferably, the air flow restricting film layer has a portion covering a certain skin area in addition to the left and right sides of the mask or nose mask. Thereby increasing the perimeter protection performance. I.e. the portion has an air flow-defining membrane layer on one side and a filter-breathable layer on the opposite side, which changes from skin to filter-breathable layer. The part covering a certain skin area can be distributed with the separation support columns or without the separation support columns.

Preferably, the air flow is confined to the left and right sides of the film layer, or to form a film strap that can be secured to the head, or to form a film ear loop that can be secured to the ear. Thereby facilitating production and use, or increasing the peripheral protective properties. The film lacing or the film earring can be the connecting component, the separation supporting columns are not necessarily distributed on the connecting component, the film lacing or the film earring can be integrally formed with the airflow limiting film layer, and the film lacing or the film earring can be added at the later stage in a heat sealing mode, a pressing mode, a fusion mode, an adhesion mode and other modes. It is advantageous to manufacture if the connecting members are of the same material as the air flow restricting film layer. For example, the air flow limiting film layer main body is a rectangular film, and the film earrings are formed by two holes hollowed out on the left side and the right side of the rectangular film.

Preferably, the air flow restricting film layer also has an overhanging elongate film beneath the mask body of the mask or nose cup. Thereby increasing the protection of the periphery, in particular the underside. The elongate film need not have the separation support posts distributed thereon.

Preferably, the average spacing of the gaps is less than or equal to 3 millimeters; and distances greater than 6 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 6 mm is not less than one half of the actual air permeable area of the filtering and air permeable layer. Preferably, the gap distribution area with the distance less than or equal to 6 mm is not less than the actual air permeable area of the filtering and air permeable layer. The part of the material of the air-permeable filter layer which is tightly attached to the outer side of the skin and is difficult to form an effective air flow passage with the outer surface of the skin does not fall within the statistical range of the actual air-permeable area of the air-permeable filter layer, for example, the edge part of the mask body, etc., but the air flow limiting film layer may cover the material of the air-permeable filter layer at the part with the gap.

Preferably, the average spacing of the gaps is less than or equal to 2 millimeters; and distances greater than 4 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 4 mm is not less than one half of the actual air permeable area of the filtering and air permeable layer. Preferably, the gap distribution area at a distance of 4 mm or less is not less than two thirds of the actual air-permeable area of the filter air-permeable layer.

Preferably, the average spacing of the gaps is less than or equal to 1 mm; and distances greater than 2 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 2 mm is not less than one fourth of the actual air-permeable area of the filtering and air-permeable layer. Preferably, the gap distribution area with the distance of less than or equal to 2 mm is not less than half of the actual air permeable area of the filter air permeable layer.

In particular, when the average distance between the gaps is equal to 1 mm, assuming that the total circumference of the gap formed by the edges of the flow restriction layer is 350 mm, the total ventilation area of the gap is 350 mm square, and the total ventilation area of the nostrils is about 200 mm square, so that the respiratory resistance of the patient is not obviously increased theoretically.

Generally, the air flow limiting film layer covers the actual air permeable area in the middle and the periphery of the filtering and air permeable layer in front of the sight line, and the gap is formed in the actual air permeable area in the periphery of the filtering and air permeable layer.

Generally, the separation support columns are distributed on the inner side of the air flow limiting film layer at the edge position of the filtering and ventilating layer. Thereby preventing the inlet and outlet of the gap from being blocked by the film layer.

Preferably, the airflow extension bag is a flat bag body with two side surfaces, at least one of the two side surfaces faces the external environment, and the side surface facing the external environment is covered with the airflow limiting film layer in a sight line.

Preferably, the upper part of the airflow limiting film layer is positioned at the bridge of the nose or/and the side of the bridge of the nose, and the airflow limiting film layer is also provided with gap blocking strips which extend towards the left side and the right side in length and are close to or contacted with the skin or the mask body of the mask or the nose mask, so that the main airflow channel between the upper part of the airflow limiting film layer and the skin or the mask body is provided with a part blocked by the gap blocking strips. So that the breathing air flow can be reduced or prevented from overflowing from the upper part of the mask body to fog the glasses or the goggles, and the air tightness of the upper edge of the mask body can be increased by the blocking strip. The approaching or contacting to the skin or to the cover may be achieved by bending the upper part of the airflow limiting film layer to the skin or to the cover or by fixing the partition support columns by adhesion, or by inclining the upper part of the airflow limiting film layer to the skin or to the cover by reducing the width of the partition support columns, or by adhering an outer strip of a certain width to the upper part of the airflow limiting film layer, or the like. For example, the gap plugging strip may be located immediately outside the upper part of the mask body, it being possible for the gap plugging strip of the air flow restricting membrane layer to contact the skin above the mask body.

Preferably, the gap plugging strip has plasticity and is positioned on the bridge of the nose and extends towards two sides. Thereby can block up the air current passageway between the upper portion that the air current injectd the thin layer and the skin or the cover body and prevent that respiratory air current from overflowing from the upper portion and make glasses or goggles hazy, in addition, also can adjust into the shape with the nose adaptation with the help of blocking the strip, directly obtain the function of nose clip strip, or with the nose clip strip synergy on the gauze mask or the nose mask cover body, increase the gas tightness of edge on the gauze mask or the nose mask cover body. The shape has plasticity, which means that a human hand can easily change and fix a required shape, and the shape can be realized by wrapping a metal strip with plastic and the like. The gap plugging strips may extend to both sides to the edge of the mask body of the mask or nose mask, or the gap plugging strips may extend to the peripheral extension of the air flow restricting film layer.

Preferably, the gap blocking strip is located on the upper portion of the airflow-restricting film layer in close proximity to a nasal splint strip on the corresponding mask or nasal mask body. Thereby better blocking the airflow path there through.

Preferably, the length of the gap plugging strip is greater than that of the corresponding nasal splint on the mask body of the mask or the nose mask. Thereby better directing the air flow to both sides.

The invention can be implemented by the above various technical schemes or any combination thereof.

The invention has the advantages that the protective effect of the mask or the nose cover or the airflow expansion bag thereof can be improved by utilizing the principle of a gap filtering method, or the requirement on the material of the air-permeable filtering layer can be properly reduced to a certain extent on the premise of certain protective performance, and the fogging of glasses or goggles and the like after wearing the mask or the nose cover can be prevented. The composite material can be simply manufactured in a large scale with low cost, can be prepared by materials available in daily life relatively easily when necessary, is suitable for epidemic prevention and control and the like, and can possibly play a certain role in restraining the global pandemic of respiratory diseases.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the air flow in the cross section of a filtering and ventilating layer of a conventional gauze mask, a nasal mask, or the like. Fig. 2 is a schematic gas flow diagram of a cross-section of a filter gas-permeable layer forming a gap with a gas flow-defining membrane layer in the present invention. Fig. 3 is a schematic front perspective view of one embodiment of the mask of the present invention. Fig. 4 is a schematic cross-sectional view of an embodiment of a mask of the present invention. FIG. 5 is a schematic longitudinal cross-section of one embodiment of an air flow extension packet of the present invention having an outer air flow-restricting film layer. Fig. 6 is a schematic longitudinal cross-section of another embodiment of an airflow extension pack of the present invention having airflow-restricting film layers on both sides. Fig. 7 is a schematic front perspective view of one embodiment of the gapped plugging strip of the present invention.

In the figure, 1, the airflow limiting film layer, 1a, the airflow limiting film layer peripheral extension, 2, the filtering and ventilating layer of a mask or a nose mask or an airflow expanding bag, 3, separation support columns, 4, the airflow direction, 5, gaps, 6, connecting parts, 7, the nose or the skin, 8, intermittent connecting lines and 9, gap plugging strips.

Detailed Description

In the embodiment shown in the attached figure 1, the device for improving the protection effect of the mask or the nose cover or the airflow extension bag thereof by utilizing the clearance filtration method is characterized in that the mask body of the mask or the nose cover or the bag wall of the airflow extension bag of the mask or the nose cover is provided with a filtering and ventilating layer (2) with the function of filtering gas, and the device is characterized in that: the main body of the appliance comprises an airflow limiting film layer (1) covering the outer side of the filtering and ventilating layer (2); the airflow limiting film layer (1) is provided with a plurality of separation supporting columns (3) which are distributed at multiple points between the airflow limiting film layer and the filtering and ventilating layer (2), and gaps (5) which are communicated with the airflow of the external environment are formed and maintained; and the spacing of said gaps (5) has a sufficiently small portion such that the gas in direct communication with the external environment is driven mainly by the wearer's breathing action at said sufficiently small portion of the gap (5) such that the proportion of the tangential movement component of the flow (4) of the gas on the outer surface of the filtering and breathable layer (2) along the walls of the gap (5) is increased; the periphery of the air flow limiting film layer (1) is provided with connecting parts (6). Preferably, the total area of the openings of the periphery of the gap (5) is larger than or equal to the total area of the orifices of the two nostrils. The air flow limiting film layer (1) can be an air-tight plastic film, an air-permeable non-woven fabric with certain air resistance and the like, and can separate or obstruct air flow limiting the external environment. The connecting part (6) can be various belts, clips, stickers, belts with clips, or the like.

The invention provides a gap filtering method: namely, the airflow limiting film layer (1) is arranged in front of the filtering and ventilating layer (2) to form a gap (5), the distance of the gap (5) is small enough, so that the air directly communicated with the external environment is mainly driven by the respiration of a wearer at the small enough part of the gap (5), the proportion of the tangential movement component of the airflow (3) on the outer surface of the filtering and ventilating layer (2) along the wall of the gap (5) is increased, and the gap (5) is utilized to obtain better air filtering and protecting effects. The principle is as follows: firstly, the air flow can be used for limiting the foreign matters outside the film layer (1) in the equal gaps (5) to block larger particle pollutants in the external environment to a certain extent; secondly, by utilizing the gap (5), the component of the gas on the outer surface of the filtering and ventilating layer (2) moving along the tangential direction is increased, the path of the pollutant reaching the filtering and ventilating layer (2) is prolonged, the inner side surface of the thin film layer (1) or/and the objects in the gap (5) such as the supports of the gap (5) can be limited by utilizing the gas flow to block or adsorb the pollutant, and at the moment, the objects in the gap (5) are preferably electrified; thirdly, when the pollutants reach the filtering and ventilating layer (2), the air flow limiting thin film layer (1) generates an air flow limiting effect, so that the air flow (3) contacts the outer side surface of the filtering and ventilating layer (2) in a direction which is closer to the tangential direction of the ventilating layer but not in the normal direction, the equivalent thickness of the air (3) passing through the filtering and ventilating layer (2) is increased, the filtering path of the air is increased, the equivalent pore size is reduced, the probability of capturing the pollutants by the filtering and ventilating layer (2) is increased, and the gap filtering method provided by the paper is utilized to obtain a better protection effect. The air resistance of the gap (5) is generally smaller than the air resistance of the filtering and air-permeable layer (2).

The emergency manufacturing method of the invention comprises the following steps: in emergency, the electrostatic plastic film can be manufactured by the friction electrification principle; the particles can be made of burnt charcoal, or made of solidified silicon rubber, or flat sponge bodies are distributed and adhered with plastic films to form gap (5) supports; the electrostatic plastic film with the support of the gap (5) covers a cotton cloth or cotton gauze mask or various masks which need to be replaced for a long time and are difficult to replace, and four corners of the electrostatic plastic film are stuck or clamped on the mask to form the gap (5); or the preservative film is used as the main body of the airflow limiting film layer (1), after the supports of the gap (5) are added, the two sides of the preservative film are cut into two side laces or earrings which can be fixed on ears or heads, and the preservative film is worn outside the mask to form the gap (5). If not urgent and without alternatives, the inventors neither suggest applying the invention in situations beyond the level of protection of the filtering and air-permeable layer (2) itself, nor do they suggest self-making the invention, the consequences of which are self-negative.

The plurality of separation supporting columns (3) can be connected in any mode in a multi-way ventilation mode, for example, a porous object or a net object, a tubular object, a spiral object or a spiral-like object formed by the plurality of separation supporting columns (3) in a whole body, or a thin strip-shaped object which extends in any direction in a three-dimensional mode and can support a certain three-dimensional space, and the like.

Preferably, the inner side surface of the air flow limiting film layer (1) or/and the surface of the separation supporting column (3) are charged with static electricity. Preferably, the air flow limiting film layer (1) is a polyethylene layer or a polypropylene layer. For example, it is a wrap film or the like. Preferably, the air flow restricting film layer (1) comprises a liquid impervious layer. Thereby the outer surface of the mask or the nose cover or the airflow expansion bag thereof has the function of preventing liquid seepage, and the mask or the nose cover or the airflow expansion bag thereof has the medical standard. Preferably, the separation support columns (3) are rubber particles or rubber strips. Such as silicone, rubber, latex, and the like. Preferably silica gel particles, which can be in direct contact with the skin. Preferably, a plurality of granules or strips are sprayed or smeared or stamped on the air flow limiting film layer (1) or the material thereof; the surface of the particles or the strips is sticky, or the surface of the airflow limiting film layer (1) is sticky; bonding the air-flow limiting film layer (1) and the granules or strips to each other to form the separation support. For example, the device can be cut out from a web of the air-flow limiting film layer (1) material after the spraying or painting or embossing and adhering is completed, or can be torn into a suitable size by the user; it is also possible to start the addition of the separation support after the air-flow limiting film layer (1) has been cut to size. For example, the plurality of particles or strips can be heated to a surface fusion state, or the airflow limiting film layer (1) is heated to a surface fusion state, then the airflow limiting film layer (1) is sprayed or smeared or stamped, and a cooling facility is arranged at the airflow limiting film layer (1) to rapidly cool the adhered joint so as to lose viscosity. For another example, the plurality of granules or strips may be mixed with an adhesive, or the adhesive may be added to the airflow limiting film, and then the plurality of granules or strips are sprayed or painted or pressed on the material of the airflow limiting film layer (1), and the airflow limiting film layer (1) has a drying device to make the bonded joint quickly dry or react with gas to lose viscosity. The tack may also not disappear or disappear incompletely. Preferably, the plurality of separation supporting columns (3) are one or more than one piece of flat sponge with good air permeability, or the plurality of separation supporting columns (3) are a plurality of granules or strips of sponge material. One flat sponge body can be a macroscopic flat surface or a macroscopic flat surface body, and can also be a macroscopic flat surface or a macroscopic flat surface body which is provided with a plurality of macroscopic holes or grids and the like. The sponge can be natural sponge or artificial sponge synthesized by various processes. Preferably, the surface of the separation support is provided with adhesive substances so that the separation support can be adhered to the filtering and ventilating layer (2). Preferably, a plurality of said utensils are connected by intermittent connecting lines (8) in a roll which can be separated by the user. Preferably, the air flow limiting film layer (1) has a portion (1a) covering a certain skin area in addition to the left and right sides of the mask or nose mask. Preferably, the air flow limiting film layer (1) is arranged on the left side and the right side, or a film strap (1a) capable of being fixed on the head is formed, or a film ear ring (1a) capable of being fixed on the ear is formed. The film frenulum or the film earring can be the connecting part (6), the separation supporting columns (3) are not necessarily distributed on the connecting part, the film frenulum or the film earring can be integrally formed with the airflow limiting film layer (1), and the film frenulum or the film earring can be added in a later period through heat sealing, pressing, fusion, adhesion and other modes. For example, the air flow limiting film layer (1) body is a rectangular film, and the film earrings are formed by two holes hollowed out on the left side and the right side of the rectangular film. Preferably, the air flow restricting film layer (1) further comprises an overhanging elongate film (1a) beneath the mask body of the mask or nose mask. Preferably, the average spacing of the gaps (5) is less than or equal to 3 mm; and a distance greater than 6 mm is not considered to be the gap (5) and does not include a statistical range of the average spacing; the distribution area of the gaps (5) with the distance less than or equal to 6 mm is not less than one half of the actual air-permeable area of the filtering and air-permeable layer (2), preferably not less than the actual air-permeable area of the filtering and air-permeable layer (2). Preferably, the average spacing of the gaps (5) is less than or equal to 2 mm; and a distance greater than 4 mm is not considered as the gap (5) and does not include a statistical range of the average spacing; the distribution area of the gaps (5) with the distance of less than or equal to 4 mm is not less than one half of the actual air-permeable area of the filtering and air-permeable layer (2), preferably not less than two thirds of the actual air-permeable area of the filtering and air-permeable layer (2). Preferably, the average spacing of the gaps (5) is less than or equal to 1 mm; and a distance greater than 2 mm is not considered to be the gap (5) and does not include a statistical range of the average spacing; the distribution area of the gaps (5) with the distance less than or equal to 2 mm is not less than one fourth of the actual air-permeable area of the filtering and air-permeable layer (2), preferably not less than one half of the actual air-permeable area of the filtering and air-permeable layer (2). Generally, the air flow limiting film layer (1) covers the actual air permeable area at the middle and the periphery of the filtering and air permeable layer (2) in front of the sight line, and the gap (5) is formed at the actual air permeable area at the periphery of the filtering and air permeable layer (2). Generally, the separation support columns (3) are distributed on the inner side of the air flow limiting film layer (1) at the edge position of the filtering and ventilating layer (2). Preferably, the airflow expansion bag is a flat bag body with two side surfaces, at least one side surface of the two side surfaces faces the external environment, and the side surface facing the external environment is covered with the airflow limiting film layer (1) in a sight line.

Preferably, the upper part of the airflow limiting film layer (1) is positioned at the bridge of the nose or/and the side of the bridge of the nose, and gap plugging strips (9) which extend to the left side and the right side and are close to or contact with the skin (7) or the mask body (2) of the mask or the nose mask are further arranged, so that the main airflow channel between the upper part of the airflow limiting film layer (1) and the skin (7) or the mask body (2) is provided with a part plugged by the gap plugging strips (9). The approach or contact to the skin (7) or to the cover (2) may be achieved by bending the upper portion of the airflow defining film layer (1) toward the skin (7) or to the cover (2) or by adhesively fixing the separation support columns (3), or by inclining the upper portion of the airflow defining film layer (1) toward the skin (7) or to the cover (2) by reducing the width of the separation support columns (3) or the width thereof, or by adhering an outer strip of a certain width to the upper portion of the airflow defining film layer (1), or the like. For example, the gap plugging strip (9) may be located immediately outside the upper part of the mask body (2), it being possible for the gap plugging strip (9) of the air flow-limiting membrane layer (1) to contact the skin (7) above the mask body (2).

Preferably, the gap plugging strip (9) is plastic in shape, is positioned on the bridge of the nose and extends towards two sides.

Preferably, the gap plugging strip (9) is located at the upper part of the air flow limiting film layer (1) and is close to the corresponding nasal splint on the mask body (2).

Preferably, the length of the gap plugging strip (9) is larger than that of a corresponding nasal splint on the mask body (2).

The invention can be implemented by the above various technical schemes or any combination thereof.

Claims (22)

1. The utility model provides an utilize clearance filtration method to improve the apparatus of the protective effect of gauze mask or nose cup or its air current expansion package, the wall of the cover body of gauze mask or nose cup or the air current expansion package of gauze mask or nose cup has the ventilative layer of filtration that has the filtered gas function, characterized by: the main body of the appliance comprises an airflow limiting thin film layer covering the outer side of the filtering and ventilating layer; the airflow limiting thin film layer is provided with a plurality of separation supporting columns which are distributed at multiple points with the filtering and ventilating layer, and gaps communicated with the airflow of the external environment are formed and kept; the periphery of the air flow limiting film layer is provided with connecting parts.

2. The apparatus for improving the protection effect of a mask or a nose mask or an airflow extension pack thereof according to claim 1, wherein: the inner surface of the airflow limiting film layer or/and the surface of the separation supporting column are charged with static electricity.

3. The apparatus for improving the protection effect of a mask or a nose mask or an airflow extension pack thereof according to claim 1, wherein: the air flow limiting film layer is a polyethylene layer or a polypropylene layer.

4. The apparatus for improving the protection effect of a mask or a nose mask or an airflow extension pack thereof according to claim 1, wherein: the air flow restricting film layer contains a liquid impervious layer.

5. The apparatus for improving the protection effect of a mask or a nose mask or an airflow extension pack thereof according to claim 1, wherein: the air flow restricting film layer body comprises an air impermeable plastic film.

6. The apparatus for improving the protection effect of a mask or a nose mask or an airflow extension pack thereof according to claim 1, wherein: the separation support columns are distributed on the inner side of the airflow limiting thin film layer at the edge position of the filtering breathable layer.

7. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the separation supporting columns are colloidal particles or rubber strips.

8. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: by spraying or painting or stamping a plurality of pellets or strips onto the air-flow defining film layer or material thereof; the surface of the particles or the strips is sticky, or the surface of the airflow limiting film layer is sticky; adhering the air flow-defining film layer and the pellets or strips to each other to form the separation support.

9. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the plurality of separation supporting columns are one or more than one piece of flat sponge with good air permeability, or the plurality of separation supporting columns are a plurality of granules or strips of sponge materials.

10. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the surface of the separation support is provided with adhesive substances so that the separation support can be adhered to the filtering and ventilating layer.

11. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: a plurality of said utensils are connected by intermittent connecting lines in a roll which can be separated by the user.

12. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the air flow limiting film layer has a portion covering a certain skin area outside of the left and right sides of the mask body of the mask or nose mask.

13. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the air flow defines film layers on the left and right sides, or forms a film strap that can be secured to the head, or forms a film ear loop that can be secured to the ear.

14. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the air flow limiting membrane layer also has an overhanging elongate membrane beneath the mask body of the mask or nose mask.

15. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the average spacing of the gaps is less than or equal to 3 millimeters; and distances greater than 6 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 6 mm is not less than one half of the actual air permeable area of the filtering and air permeable layer.

16. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the average spacing of the gaps is less than or equal to 2 millimeters; and distances greater than 4 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 4 mm is not less than one half of the actual air permeable area of the filtering and air permeable layer.

17. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the average spacing of the gaps is less than or equal to 1 millimeter; and distances greater than 2 millimeters are not considered the gap and do not include a statistical range for the average spacing; the gap distribution area with the distance less than or equal to 2 mm is not less than one fourth of the actual air-permeable area of the filtering and air-permeable layer.

18. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the airflow extension bag is a flat bag body with two side surfaces, at least one of the two side surfaces faces the external environment, and the side surface facing the external environment is covered with the airflow limiting film layer in a sight line.

19. The apparatus for improving the protective effect of a mask or a nose mask or an airflow extension pack thereof according to any one of claims 1 to 6, which comprises: the upper part of the airflow limiting film layer is positioned at the nose bridge or/and the side edge of the nose bridge, and the airflow limiting film layer also comprises gap plugging strips which extend to the left side and the right side and are close to or contacted with the skin or the mask body of the nose mask, so that the main airflow channel between the upper part of the airflow limiting film layer and the skin or the mask body is provided with a part plugged by the gap plugging strips.

20. The exhalation filter module of claim 19 and a mask or nose mask with an exhalation filter module, wherein: the gap blocking strip-shaped structure has plasticity and is positioned on the nose bridge and extends towards two sides.

21. The exhalation filter module of claim 19 and a mask or nose mask with an exhalation filter module, wherein: the gap blocking strips are positioned at the upper part of the airflow limiting film layer and are close to the corresponding nasal splint strips on the mask body of the mask or the nose mask.

22. The exhalation filter module of claim 19 and a mask or nose mask with an exhalation filter module, wherein: the length of the gap plugging strip is larger than that of the corresponding nose clip strip on the mask body of the mask or the nose mask.

Images