KR102178075B1 - Indicator for detecting life of mask and mask with the same - Google Patents

Abstract

The present invention relates to a mask lifespan indicator and a mask including the same, capable of easily and clearly recognizing a lifespan and a replacement time of the mask. According to the present invention, the mask lifespan indicator includes: an air-permeable substrate; and a detection layer formed on one surface of the air-permeable substrate, and including an indicator having a color changed by reacting with carbon dioxide.

Description

Mask life indicator and mask including the same {INDICATOR FOR DETECTING LIFE OF MASK AND MASK WITH THE SAME}

The present invention relates to a mask life indicator capable of easily and clearly grasping the life and replacement time of a mask, including an indicator that changes color by reacting with carbon dioxide, and a mask including the same.

In recent years, due to reckless industrial development, a large amount of various harmful substances such as fine dust and yellow dust are generated, and the number of patients with respiratory diseases is increasing rapidly. Accordingly, in various industrial sites, as well as in leisure activities such as sports and mountaineering, masks are worn to prevent the introduction of harmful substances into the respiratory tract in advance.

Masks are worn on the face to block harmful substances contained in the air from entering the human body. Compared to a full-face mask that protects the entire face, masks are mainly used in a simpler structure by protecting only the nose and mouth. Is being used. These face masks not only block the inhalation of harmful substances contained in the air in the atmosphere, but also in public institutions, shopping malls, buses, subways, etc. where multiple people gather, such as cold disease or Middle East Respiratory Syndrome (MERS). It is used for the purpose of preventing the transmission of viruses from people with severe acute respiratory disease. On the contrary, it is used for the purpose of preventing infectious viruses from leaking into the air and causing damage to other people.

In general, when inhaling, external air is filtered through the mask body and introduced into the human body. However, if you wear such a mask for a long time, not only the inside of the mask becomes wet due to the snort and breath discharged during exhalation, but also gives unpleasant feelings for a long time due to sweat, and the concentration of the filtered dust in the mask body increases, causing bacteria, etc. to breed. It provided an environment that could be done, so wearing a mask adversely affected health. Accordingly, there is a need for a mask wearer to easily grasp the life and replacement time of the mask by himself.

Accordingly, Korean Patent Registration No. 10-1783804 discloses a mask attached with an air purification filter device having a pollution detection sensor so as to determine whether the internal filter is contaminated; Republic of Korea Patent Registration No. 10-1752845 discloses a mask capable of detecting life.

However, these five surface detection sensors and mask life detection devices are electronic detection devices and have a disadvantage of being relatively expensive. In addition, the degree of contamination of the mask is not severe or it is in a state that it can be used sufficiently, but it is not possible to check whether it can be used, so there is a problem that unnecessary costs are consumed because the mask that has been used is often discarded and a new mask is purchased. That is, there is a limit to the user's ability to easily grasp the life and replacement time of the mask in advance.

Korean Patent Registration No. 10-1783804 Korean Patent Registration No. 10-1752845

The present invention has been conceived to solve the above-described problem, and an embodiment of the present invention is to provide a mask life indicator capable of easily and clearly grasping the life and replacement timing of the mask, and a mask including the same.

Various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

One embodiment of the present invention is a breathable substrate; And a detection layer formed on one surface of the breathable substrate and including an indicator that changes color in response to carbon dioxide, as a mask life indicator capable of simply and clearly grasping the life and replacement time of the mask; The breathable substrate contains at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium percarbonate, sodium carbonate, and mixtures thereof in a concentration of 0.05 to 10% by weight. By coating the surface with a basic aqueous solution containing as, the pH of the surface is adjusted to 8 to 12; Indicators of the detection layer are bromothymol blue, phenolphthalein, thymol blue, methylene red, phenol red, cresol red, m- Cresol purple, methyl orange, 2,6-dinitrophenol, 2,4-dinitrophenol, 4-dimethylamino Azobenzene (4-Dimethylaminoazobenzene), Bromophenol blue, Congo red, Ethoxychrysoidine, Bromocresol Green, 2,5-dinitrophenol (2 ,5-Dinitrophenol), Bromocresol purple, 4-nitrophenol (Nitrophenol), Bromoxylene blue (Bromoxylene blue) and 3-nitrophenol (3-Nitrophenol) at least one selected from the group consisting of It provides a mask life indicator comprising a.

The mask life indicator is a breathable substrate; A detection layer formed on one surface of the breathable substrate and including an indicator that changes color by reacting with carbon dioxide; And a polymeric protective layer formed on the other side of the detection layer and configured to protect the mask life indicator from external contamination. The polymer protective layer is based on 100 parts by weight of the propylene-ethylene-1-butene copolymer, 30 to 50 parts by weight of ethylene vinyl acetate (EVA), 10 to 10 to hydroxy (C1 to C4 alkyl) glycidyl (meth)acrylate 30 parts by weight, 3-glycidoxypropyltrimethoxysilane 10 to 30 parts by weight, tetrafluoropropyl methacrylate 10 to 30 parts by weight, amine compound 1 to 10 parts by weight, and N-butoxymethylacrylamide 1 to It may contain 10 parts by weight.

The polymeric protective layer further comprises 1 to 10 parts by weight of a carbon dioxide adsorbent; The carbon dioxide adsorbent may be one obtained by modifying the surface of zeolite, activated carbon or silica with 3-aminopropyltrimethoxysilane.

The polymer protective layer may be formed of a plurality of dot-type layers.

The breathable substrate is to form a nonwoven web by melt spinning raw materials including 10 to 30 parts by weight of polylactic acid resin and 5 to 20 parts by weight of ginseng foil fiber through an extruder and a spinning nozzle based on 100 parts by weight of a polyolefin resin; The ginseng foil fiber is prepared by adding ginseng foil to an aqueous solution of sodium hydroxide at a concentration of 10 to 20% by weight, cooking for 20 to 50 minutes, removing foreign substances using a centrifugal dust collector, selecting, washing with water and dehydrating. Can be used.

In addition, another embodiment of the present invention is a mask including the mask life indicator, a body portion covering the nose and mouth from the face of the wearer, a filter portion provided in front of the body portion, and a cover provided in front of the filter portion Includes wealth; The mask life indicator is attached to the inner surface or the outer surface of the cover part to provide a mask including a mask life indicator that is integrated.

The mask including the mask life indicator is integrated by attaching the mask life indicator to the inner surface of the cover portion; A transparent viewing window may be formed on a cover portion corresponding to a portion to which the mask life indicator is attached so that a color change of the mask life indicator can be confirmed.

According to the mask life indicator and the mask including the same according to an embodiment of the present invention, it is possible to easily and clearly grasp the life and replacement time of the mask, including an indicator that changes color in response to carbon dioxide. Accordingly, there is an effect of preventing the user from being exposed to bacterial infection by preventing the user from using a contaminated mask, replacing the mask with a new one, or inducing use after sterilization washing.

In addition, there is an effect of preventing unnecessary wasted costs incurred by discarding the mask that still has a lifespan and purchasing a new mask.

1 to 3 are schematic perspective views and cross-sectional views of a mask life indicator according to an embodiment of the present invention.
4 and 5 are schematic exploded perspective views of a mask including a mask life indicator according to an embodiment of the present invention.
6 shows an image of a result of observing the initial color (0 hr) of the mask life indicator prepared in Example 4 and the color after the end of life (after 10 hr).

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is a breathable substrate; And a detection layer formed on one surface of the breathable substrate and including an indicator that changes color in response to carbon dioxide, as a mask life indicator capable of simply and clearly grasping the life and replacement time of the mask; The breathable substrate contains at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium percarbonate, sodium carbonate, and mixtures thereof in a concentration of 0.05 to 10% by weight. By coating the surface with a basic aqueous solution containing as, the pH of the surface is adjusted to 8 to 12; Indicators of the detection layer are bromothymol blue, phenolphthalein, thymol blue, methylene red, phenol red, cresol red, m- Cresol purple, methyl orange, 2,6-dinitrophenol, 2,4-dinitrophenol, 4-dimethylamino Azobenzene (4-Dimethylaminoazobenzene), Bromophenol blue, Congo red, Ethoxychrysoidine, Bromocresol Green, 2,5-dinitrophenol (2 ,5-Dinitrophenol), Bromocresol purple, 4-nitrophenol (Nitrophenol), Bromoxylene blue (Bromoxylene blue) and 3-nitrophenol (3-Nitrophenol) at least one selected from the group consisting of It provides a mask life indicator comprising a.

In general, the daily respiration volume of adults is known to be about 8000L, and the amount of CO ₂ exhaled by humans through double exhalation is known to be about 4% (about 320L). On the other hand, the recommended use time of a general mask is 5 to 10 hours/day, and a person discharges about 70 to 130 L of carbon dioxide during the time of using the mask. Carbon dioxide (CO ₂ ) generated by exhaling while wearing such a mask meets with moisture (H ₂ O) in the air to generate carbonic acid (H ₂ CO ₃ ) and acidifies the surface of the mask.

Accordingly, one embodiment of the present invention is to easily grasp the life and replacement time of the mask by applying the acid-based indicator to the mask life indicator. However, since the surface properties of the conventional mask fabric have already been acidified, there is a problem in that it is difficult to clearly check the color change of the indicator. Therefore, by adjusting the time at which the color of the indicator is changed to 5 to 10 hours/day, which is the recommended use time of the mask, it is intended to clearly grasp the color change of the indicator.

According to the mask life indicator and the mask including the same according to an embodiment of the present invention, it is possible to easily and clearly grasp the life and replacement time of the mask, including an indicator that changes color in response to carbon dioxide. Accordingly, there is an effect of preventing the user from being exposed to bacterial infection by preventing the user from using a contaminated mask, replacing the mask with a new one, or inducing use after sterilization washing.

In addition, there is an effect of preventing unnecessary wasted costs incurred by discarding the mask that still has a lifespan and purchasing a new mask.

More specifically, the mask life indicator 100 includes a breathable substrate 10; And a detection layer 20 formed on one surface of the breathable substrate and including an indicator that changes color by reacting with carbon dioxide. 1 is a schematic perspective view and a cross-sectional view of a mask life indicator according to an embodiment of the present invention.

The breathable substrate 10 is generally used in the art, and its type is not particularly limited, but a nonwoven web formed by melt spinning a raw material containing a polyolefin resin through an extruder and a spinning nozzle can be preferably used. have.

The breathable substrate contains at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium percarbonate, sodium carbonate, and mixtures thereof in a concentration of 0.05 to 10% by weight. By coating the surface with a basic aqueous solution containing as, it is possible to clearly grasp the color change of the indicator by using the pH of the surface adjusted to 8 to 12.

In this case, the coating is a method generally used in the art, and the method is not particularly limited, but may be performed by, for example, dip coating or wash coating.

In particular, the breathable substrate is formed by melt spinning raw materials including 10 to 30 parts by weight of polylactic acid resin and 5 to 20 parts by weight of ginseng foil fiber through an extruder and a spinning nozzle based on 100 parts by weight of a polyolefin resin. It can be used more preferably. Thereby, the breathable substrate may partially decompose the surface of the fiber tissue by the process of coating the basic aqueous solution to further improve the roughness of the fiber structure, and this may increase the coating amount of the indicator to be coated thereafter. As a result, it is possible to more clearly grasp the color change of the indicator.

At this time, the ginseng foil fiber is prepared by adding ginseng foil to an aqueous solution of sodium hydroxide at a concentration of 10 to 20% by weight, cooking for 20 to 50 minutes, removing foreign substances using a centrifugal vibration damper, selecting, washing with water and dehydrating. What is manufactured can be used. In this way, the above-described effect can be further improved.

Indicators of the detection layer 20 are Bromothymol blue, phenolphthalein, thymol blue, methylene red, phenol red, and cresol red. , m-Cresol purple, Methyl orange, 2,6-Dinitrophenol, 2,4-Dinitrophenol, 4 -Dimethylaminoazobenzene, Bromophenol blue, Congo red, Ethoxychrysoidine, Bromocresol Green, 2,5-dinitro Phenol (2,5-Dinitrophenol), bromocresol purple (Bromocresol purple), 4-nitrophenol (Nitrophenol), bromoxylene blue (Bromoxylene blue) and 3-nitrophenol (3-Nitrophenol) selected from the group consisting of What contains one or more can be used. More preferably, it is preferable to use bromothymol blue or phenolphthalein, which has various color changes in strong base, neutral, and acid, and in particular, has a distinct color difference from basic to acid.

The detection layer can accurately guide the life of the mask only when its color changes sensitively only by carbon dioxide (CO ₂ ) and moisture (H ₂ O) discharged by human breathing. However, when the detection layer is contaminated by external contamination, the rate at which the color changes is changed, so that the life of the mask may not be accurately guided.

Accordingly, the mask life indicator 100 may include a breathable substrate 10; A detection layer 20 formed on one side of the breathable substrate and including an indicator that changes color by reacting with carbon dioxide; And a polymer protective layer 30 formed on the other side of the detection layer and protecting the mask life indicator from external contamination. A schematic perspective view and a cross-sectional view of a mask life indicator according to an embodiment of the present invention are shown in FIG. 2.

At this time, the breathable substrate 10 and the detection layer 20 are as described above.

The polymeric protective layer 30 is based on 100 parts by weight of the propylene-ethylene-1-butene copolymer, 30 to 50 parts by weight of ethylene vinyl acetate (EVA), hydroxy (C1 to C4 alkyl) glycidyl (meth)acrylic 10 to 30 parts by weight of rate, 10 to 30 parts by weight of 3-glycidoxypropyltrimethoxysilane, 10 to 30 parts by weight of tetrafluoropropyl methacrylate, 1 to 10 parts by weight of amine compound, and N-butoxymethylacrylic It may contain 1 to 10 parts by weight of amide.

As a result, there is an effect of excellent adhesion and integrity with the breathable substrate, and effectively protecting the mask life indicator from external contamination. In addition, since the polymeric protective layer collects moisture and carbon dioxide and discharges it at a constant rate, there is an effect of preventing the pH of the detection layer from rapidly changing due to moisture and carbon dioxide. Accordingly, the time at which the color of the indicator of the detection layer is changed is adjusted to 5 to 10 hours/day, which is the recommended use time of the mask, and the color change of the indicator can be more clearly grasped.

More specifically, the propylene-ethylene-1-butene copolymer functions to improve adhesion and integrity with the breathable substrate and the detection layer.

The ethylene vinyl acetate (EVA) not only improves adhesion and integrity with the breathable substrate and the detection layer, but also functions to improve transparency and flexibility. In consideration of these functions, the ethylene vinyl acetate (EVA) may be contained in an amount of 30 to 50 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer.

The hydroxy (C1 to C4 alkyl) glycidyl (meth)acrylate not only improves adhesion and integrity with the breathable substrate and the detection layer, but also functions to trap moisture. In consideration of these functions, the hydroxy (C1 to C4 alkyl) glycidyl (meth)acrylate may be contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer.

The 3-glycidoxypropyltrimethoxysilane not only further improves adhesion to the breathable substrate and the detection layer, but also functions to trap moisture. In consideration of these functions, the 3-glycidoxypropyltrimethoxysilane may be contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer.

The tetrafluoropropyl methacrylate not only improves adhesion and integrity with the breathable substrate and the detection layer, but also functions to effectively protect the mask life indicator from external contamination. In consideration of these functions, the tetrafluoropropyl methacrylate may be contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer.

The amine compound functions to allow the polymer protective layer to collect moisture and carbon dioxide and discharge it at a constant rate. In consideration of these functions, the amine compound may be contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer. At this time, the amine compound is a group consisting of polyethyleneimine, tetraethylenepentamine, triethylenetetramine, pentaethylenehexamine, diethylenetriamine, and mixtures thereof At least one selected from can be preferably used.

The N-butoxymethylacrylamide not only further improves adhesion to the breathable substrate and the detection layer, but also functions to more effectively capture moisture. In consideration of these functions, the N-butoxymethylacrylamide may be contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the propylene-ethylene-1-butene copolymer.

In addition, the polymer protective layer 30 may further include 1 to 10 parts by weight of a carbon dioxide adsorbent to further improve the effect that the polymer protective layer collects moisture and carbon dioxide and discharges it uniformly. In this case, the carbon dioxide adsorbent may further improve the above-described effect by using a zeolite, activated carbon or silica surface modified with 3-aminopropyltrimethoxysilane.

The polymeric protective layer 30 is formed on the other surface of the detection layer, and includes one or more through holes, and must be open so that the detection layer can contact moisture and carbon dioxide. At this time, the through hole is opened to be 30 to 70 area% of the total area of the detection layer; It is preferable that the polymer protective layer 30 is formed to have a certain pattern. As a result, the polymeric protective layer can effectively protect the mask life indicator from external contamination, as well as prevent the pH of the detection layer from being rapidly changed by moisture and carbon dioxide. Accordingly, the time at which the color of the indicator of the detection layer is changed is adjusted to 5 to 10 hours/day, which is the recommended use time of the mask, and the color change of the indicator can be more clearly grasped.

In addition, the polymer protective layer 30 is formed of a plurality of dot-type layers to more easily manufacture a mask life indicator, thereby further improving the above-described effects. 3 is a schematic perspective view and a cross-sectional view of a mask life indicator according to an embodiment of the present invention.

More specifically, the polymeric protective layer 30 is coated with a raw material for forming the polymeric protective layer in the presence of a mesh-type screen mask on the other side of the detection layer, and then the mesh-type screen mask is removed. It can be formed by a method.

In addition, the coated raw material may be formed more preferably by heat treatment at a temperature of 80 to 120 ℃.

On the other hand, another embodiment of the present invention is a mask including the mask life indicator, a body portion 101 covering the nose and mouth from the face of the wearer, a filter portion 102 provided in front of the body portion, and the filter It includes a cover portion 103 provided in front of the unit; The mask life indicator 100 is attached to the inner or outer surface of the cover part 103 to provide a mask including a mask life indicator that is integrated. 4 is a schematic exploded perspective view of a mask including a mask life indicator according to an embodiment of the present invention.

The mask including the mask life indicator is integrated by attaching the mask life indicator 100 to the inner surface of the cover part 103; A transparent viewing window 104 may be formed on a cover portion corresponding to a portion to which the mask life indicator is attached so as to check the color change of the mask life indicator. 5 is a schematic exploded perspective view of a mask including a mask life indicator according to an embodiment of the present invention.

According to the mask life indicator and the mask including the same according to an embodiment of the present invention, it is possible to easily and clearly grasp the life and replacement time of the mask, including an indicator that changes color in response to carbon dioxide. Accordingly, there is an effect of preventing the user from being exposed to bacterial infection by preventing the user from using a contaminated mask, replacing the mask with a new one, or inducing use after sterilization washing.

In addition, there is an effect of preventing unnecessary wasted costs incurred by discarding the mask that still has a lifespan and purchasing a new mask.

Above, the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to the above embodiment, and various modifications by those of ordinary skill in the relevant field within the scope of the technical idea of the present invention This is possible.

<Example 1>

As the breathable substrate, a polypropylene nonwoven fabric was used, and the breathable substrate was washed-coated on the surface using an aqueous sodium hydroxide solution having a concentration of 0.05%, and the pH of the surface was adjusted to be 12.

Thereafter, a detection layer was formed by coating bromothymol blue as an indicator on one surface of the breathable substrate, thereby preparing a mask life indicator.

<Example 2>

As the breathable substrate, a nonwoven fabric prepared by melt spinning a raw material including 23 parts by weight of polylactic acid resin and 7 parts by weight of ginseng foil fiber through an extruder and a spinning nozzle was used, based on 100 parts by weight of the polypropylene resin, and the breathable substrate is The pH of the surface was adjusted so that the pH of the surface was 12 by wash-coating the surface with a 0.05% concentration of sodium hydroxide aqueous solution. At this time, the ginseng foil fiber is prepared by adding ginseng foil to an aqueous sodium hydroxide solution at a concentration of 15% by weight, cooking for 30 minutes, removing foreign substances using a centrifugal vibration damper, selecting, washing with water and dehydrating. I did.

Thereafter, a detection layer was formed by coating bromothymol blue as an indicator on one surface of the breathable substrate, thereby preparing a mask life indicator.

<Example 3>

As the breathable substrate, a nonwoven fabric prepared by melt spinning a raw material including 23 parts by weight of polylactic acid resin and 7 parts by weight of ginseng foil fiber through an extruder and a spinning nozzle was used, based on 100 parts by weight of the polypropylene resin, and the breathable substrate is The pH of the surface was adjusted so that the pH of the surface was 12 by wash-coating the surface with a 0.05% concentration of sodium hydroxide aqueous solution. At this time, the ginseng foil fiber is prepared by adding ginseng foil to an aqueous sodium hydroxide solution at a concentration of 15% by weight, cooking for 30 minutes, removing foreign substances using a centrifugal vibration damper, selecting, washing with water and dehydrating. I did.

Thereafter, a detection layer was formed by coating bromothymol blue as an indicator on one side of the breathable substrate.

Thereafter, on the other side of the detection layer, with respect to 100 parts by weight of the propylene-ethylene-1-butene copolymer in the presence of a mesh-type screen mask, 38 parts by weight of ethylene vinyl acetate (EVA), and hydroxy (propyl) 13 parts by weight of glycidyl methacrylate, 19 parts by weight of 3-glycidoxypropyltrimethoxysilane, 25 parts by weight of tetrafluoropropyl methacrylate, 9 parts by weight of tetraethylenepentanamine and N-butoxymethylacrylamide After coating the raw material for forming the polymer protective layer containing 5 parts by weight, the mesh-shaped screen mask was removed. As a result, as shown in FIG. 3, a mask lifetime indicator having a dot-type polymer protective layer formed thereon was manufactured.

<Example 4>

A mask life indicator was prepared in the same manner as in Example 3, but the raw material for forming the polymer protective layer further comprises 7 parts by weight of a carbon dioxide adsorbent having a surface of silica modified with 3-aminopropyltrimethoxysilane. Was used.

<Comparative Example 1>

As the breathable substrate, a polypropylene nonwoven fabric was used, and then, bromothymol blue was coated on one side of the breathable substrate as an indicator to form a detection layer, thereby preparing an indicator for comparison.

<Test Example>

After putting the mask life indicator prepared in Examples 1 to 4 and the comparative indicator prepared in Comparative Example 1 into a sealed chamber maintaining a temperature of 50 °C and a humidity of 80%, at a rate of 9 L/hr. Carbon dioxide was passed. Thereafter, the color of the indicator was investigated by time, and the results are shown in Table 1 below.

In addition, the initial color (0 hr) and the color after the end of the life (after 10 hr) of the mask life indicator prepared in Example 4 are shown in FIG. 6.

Time(hr) Example 1 Example 2 Example 3 Example 4 Comparative Example 1 One Blue Blue Blue Blue Blue 2 yellow 3 4 5 yellow 6 yellow 7 green green 8 9 yellow 10 yellow

As can be seen in Table 1, the comparative indicator prepared in Comparative Example 1 changes the color of the indicator to yellow within 1 hour after contacting with carbon dioxide, which is not appropriate for guiding the life of the mask according to carbon dioxide. I could confirm that.

In contrast, in the mask life indicators prepared in Examples 1 to 4, the color of the indicator changed to yellow 5 to 10 hours after contact with carbon dioxide, which is a recommended use time of a general mask of 5 to 10 hours/day. It was confirmed that it is very suitable for guiding the life of the mask according to carbon dioxide.

In particular, in the mask life indicators prepared in Examples 3 and 4, the color change rate was delayed, so that blue, green, and yellow were all confirmed. The results of observing the initial color (0 hr) and the color after the end of life (after 10 hr) of the mask life indicator prepared in Example 4 can be confirmed as shown in FIG. 6.

Accordingly, it is expected that the life of the mask and the replacement timing can be easily and clearly grasped.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, all the embodiments described above are illustrative and should be understood as non-limiting. The scope of the present invention should be construed as including all altered or modified forms derived from the meaning and scope of the claims to be described later rather than the above detailed description, and equivalent concepts thereof.

100: mask life indicator
10: breathable substrate 20: detection layer 30: polymer protective layer
101: mask body portion 102: mask filter portion
103: mask cover part 104: viewing window

Claims (7)

Breathable substrate; And a detection layer formed on one surface of the breathable substrate and including an indicator that changes color in response to carbon dioxide, as a mask life indicator capable of simply and clearly grasping the life and replacement time of the mask;
The breathable substrate contains at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium percarbonate, sodium carbonate, and mixtures thereof in a concentration of 0.05 to 10% by weight. By coating the surface with a basic aqueous solution containing as, the pH of the surface is adjusted to 8 to 12;
Indicators of the detection layer are bromothymol blue, phenolphthalein, thymol blue, methylene red, phenol red, cresol red, m- Cresol purple, methyl orange, 2,6-dinitrophenol, 2,4-dinitrophenol, 4-dimethylamino Azobenzene (4-Dimethylaminoazobenzene), Bromophenol blue, Congo red, Ethoxychrysoidine, Bromocresol Green, 2,5-dinitrophenol (2 ,5-Dinitrophenol), Bromocresol purple, 4-nitrophenol (Nitrophenol), Bromoxylene blue (Bromoxylene blue) and at least one selected from the group consisting of 3-nitrophenol Including,
The mask life indicator is a breathable substrate; A detection layer formed on one surface of the breathable substrate and including an indicator that changes color by reacting with carbon dioxide; And a polymeric protective layer formed on the other side of the detection layer and configured to protect the mask life indicator from external contamination.
The polymeric protective layer
Based on 100 parts by weight of the propylene-ethylene-1-butene copolymer, 30 to 50 parts by weight of ethylene vinyl acetate (EVA), 10 to 30 parts by weight of hydroxy (C1 to C4 alkyl) glycidyl (meth)acrylate, 3 -Including 10 to 30 parts by weight of glycidoxypropyltrimethoxysilane, 10 to 30 parts by weight of tetrafluoropropyl methacrylate, 1 to 10 parts by weight of an amine compound, and 1 to 10 parts by weight of N-butoxymethylacrylamide Mask life indicator, characterized in that.
delete The method of claim 1,
The polymeric protective layer further comprises 1 to 10 parts by weight of a carbon dioxide adsorbent;
The carbon dioxide adsorbent is a mask life indicator, characterized in that the surface of zeolite, activated carbon, or silica is modified with 3-aminopropyltrimethoxysilane.
The method of claim 1,
The mask life indicator, characterized in that the polymer protective layer is formed of a plurality of dot type layers.
The method of claim 1,
The breathable substrate is
Forming a nonwoven web by melt spinning raw materials including 10 to 30 parts by weight of polylactic acid resin and 5 to 20 parts by weight of ginseng foil fiber through an extruder and a spinning nozzle based on 100 parts by weight of the polyolefin resin;
The ginseng foil fiber is prepared by adding ginseng foil to an aqueous solution of sodium hydroxide at a concentration of 10 to 20% by weight, cooking for 20 to 50 minutes, removing foreign substances using a centrifugal dust collector, selecting, washing with water and dehydrating. Mask life indicator, characterized in that.
A mask comprising a mask lifetime indicator according to any one selected from claim 1, 3, 4, and 5,
A body portion covering the nose and mouth from the wearer's face, a filter portion provided in front of the body portion, and a cover portion provided in front of the filter portion;
A mask comprising a mask life indicator, characterized in that the mask life indicator is attached to and integrated on an inner side or an outer side of the cover part.
The method of claim 6,
The mask including the mask life indicator is integrated by attaching the mask life indicator to the inner surface of the cover portion;
A mask comprising a mask life indicator, characterized in that a transparent viewing window is formed on a cover portion corresponding to a portion to which the mask life indicator is attached to confirm a color change of the mask life indicator.

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