JP5476112B2 - mask - Google Patents

Description

  The present invention relates to a mask.

In recent years, respiratory infections such as resistant tuberculosis, viral pneumonia, and influenza have become prevalent, and the damage caused thereby has spread worldwide. In particular, since so-called new influenza does not have antibodies, humans do not have antibodies, so that infection can spread rapidly and easily reach a pandemic state. In order to prevent such a pandemic, it is recommended to wear a mask in addition to gargle and wash hands.
However, as for the mask for coping with influenza, the basic examination and the standardization which are performed about the surgical mask (surgical mask) are not performed. Therefore, the present situation is diverting pollen and dust masks and surgical masks.

Influenza is infected by the influenza virus contained in the saliva or runny nose of an infected person entering the body from the respiratory system of another person's mouth, nose, etc., regardless of whether it is seasonal or new influenza.
Therefore, the present inventor has made it possible to prevent the influenza virus from being released to the outside by an influenza infected person, which could not be realized with conventional pollen and dust masks or surgical masks. I thought it was possible to suppress the epidemic.
Therefore, an object of the present invention is to provide a mask capable of preventing a pathogen such as influenza virus from being released to the outside from an infected person having a respiratory infection such as influenza.

  As a result of intensive studies to achieve the above object, the present inventor has completed a mask having a novel structure.

That is, the present invention provides the following (1) to (19).
(1) A body part covering a lower part of the face including the wearer's nose and mouth, and a fixing part coupled to the body part and fixing the body part to the lower part of the wearer's face,
The main body is
It has a laminate in which an inner sheet, a pathogen inactivating layer, and an outer sheet are laminated in this order from the wearer side, and the air permeability of the laminate according to the Frazier method is 15 cm ³ / (cm ² · s ) And the laminated part
A sheet member having a permeability of 2 cm ³ / (cm ² · s) or less provided by the Frazier method provided at the lower portion of the laminated portion and forming a space for accommodating the tip of the lower jaw of the wearer. The lower pocket,
An upper pocket portion formed by a sheet member provided at the upper portion of the laminated portion and having an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method and forming a space for accommodating the wearer's nose; A tape member provided at the upper part of the laminated part and deformable along the shape of the wearer's nose, and a wire provided at the upper part of the laminated part and deformable along the shape of the wearer's nose And at least one selected from the group consisting of members.
(2) The mask according to (1), wherein an elastic material is provided on at least a part of an edge of the lower pocket portion.
(3) The above (2), wherein the elastic material provided on at least a part of the edge portion of the lower pocket portion is arranged to be positioned below the lower jaw of the wearer when worn. The mask described in 1.
(4) The mask according to any one of (1) to (3), wherein an elastic material is provided on at least a part of an edge of the upper pocket portion.

(5) The mask according to any one of (1) to (4), wherein the pathogen inactivation layer is composed of a plurality of sheet-like materials.
(6) The mask according to (5), wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivation layer is folded.
(7) At least one of the plurality of sheet-like materials constituting the pathogen inactivating layer has a thickness of 0.5 mm or more under no load and an apparent specific gravity of 0.1 or less. The mask according to (5) or (6).
(8) Any of the above (5) to (7), wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivation layer is a nonwoven fabric using synthetic fibers having antiviral performance. The mask of crab.
(9) Any of the above (5) to (8), wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is a hydrophilic nonwoven fabric using cellulosic fibers. The mask described in 1.
(10) The method according to any one of (5) to (9), wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivation layer is a nonwoven fabric using ultrafine cellulose. mask.
(11) Any one of the above (5) to (10), wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivation layer is a sheet containing an inorganic substance supporting metal ions. The mask described in 1.
(12) The mask according to (11) above, wherein the sheet containing an inorganic substance supporting metal ions is a nonwoven fabric using ultrafine cellulose.
(13) The above (11), wherein the metal ion is at least one selected from the group consisting of Cu ion, Ag ion, Zn ion, Ti ion, Au ion, Pt ion, Mn ion, Fe ion and Zr ion. Or the mask as described in (12).
(14) The above (11) to (13), wherein the inorganic substance is at least one selected from the group consisting of zeolite, dolomite, apatite, hydroxyapatite, activated carbon, activated alumina, titanium dioxide, shirasu balloon, silica gel, and molecular sieve. ) The mask according to any one of

(15) The fixing portion is made of a loop-like stretchable material that is hung on a wearer's ear, and the stretchable material is a unidirectionally stretchable elastic composite in which both sides of an elastomer film are laminated with a nonwoven fabric. The mask according to any one of (1) to (14) above, which is provided with a slit or notch.
(16) The mask according to any one of (1) to (15), wherein the inner surface sheet is porous.
(17) The mask according to any one of (1) to (16), wherein the inner surface sheet has a bowl-shaped uneven structure on the surface.
(18) The mask according to any one of (1) to (17), wherein the main body portion further has a removable sheet member for replacement on the wearer side of the inner surface sheet of the laminated portion.
(19) The mask according to any one of (1) to (18), wherein the lower pocket portion, the upper pocket portion, and the fixing portion of the main body portion are formed of a single sheet member.

  The mask of the present invention can prevent a pathogen such as influenza virus from being released to the outside from a person infected with a respiratory infection such as influenza.

It is a schematic diagram which shows the example of the mask of this invention. It is a typical exploded bottom view which shows the lamination | stacking part of the mask of this invention. It is a schematic diagram which shows the example of the main-body part of the mask of this invention. It is a typical vertical end view which shows another example of the main-body part of the mask of this invention. It is a typical vertical end view which shows another example of the main-body part of the mask of this invention. It is a schematic diagram which shows another example of the mask of this invention. It is a schematic diagram which shows another example of the mask of this invention. It is a schematic diagram which shows another example of the mask of this invention. It is the typical top view which looked at another example of the mask of this invention which comprises various fixing | fixed parts from the inner side. It is the typical top view which looked at another example of the mask of this invention which comprises various fixing | fixed parts from the inner side. It is a schematic diagram which shows another example of the mask of this invention which comprises various fixing | fixed parts. It is a schematic diagram which shows the apparatus which measures the leak rate of a mask. It is a schematic diagram which shows the apparatus which prepares the alcohol containing air used for the measurement of the leak rate of a mask. It is a schematic diagram which shows the mask mounting jig used for the measurement of the leak rate of a mask.

  Hereinafter, the mask of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. In the present specification, when the mask of the present invention is actually worn, the side closer to the wearer's skin is referred to as “inside” and the far side is referred to as “outside”. When the mask of the present invention is actually worn, the side corresponding to the upper side of the wearer's body is referred to as “upper”, and the side corresponding to the lower side is referred to as “lower”. Moreover, in order to make an understanding easy in each figure, the member which is actually contacting may be shown spaced apart.

  FIG. 1 is a schematic view showing an example of the mask of the present invention. 1A is a perspective view, FIG. 1B is a plan view of the mask of the present invention viewed from the inside, and FIG. 1C is along the IC-IC line in FIG. 1B. FIG. In each plan view in the attached drawings, the upper side of the mask or the like is positioned on the upper side of the drawing. Further, in each vertical end view in the attached drawings, the upper side of the mask or the like is positioned on the left side of the drawing.

The mask 100 of the present invention basically includes a main body 10 that covers a lower part of the face including the wearer's nose and mouth, and a fixing part 90 that is coupled to the main body 10 and fixes the main body 10 to the lower part of the wearer's face. It comprises.
The main body 10 is
An inner sheet, a pathogen inactivating layer, and an outer sheet have a laminated body 30 laminated in this order from the wearer side, and the air permeability of the laminated body 30 by the Frazier method is 15 cm ³ / (cm ² · s) a laminated portion 20 that is greater than
Formed by a sheet member provided at the lower portion of the laminated portion 20 and having an air permeability of 2 cm ³ / (cm ² · s) or less by the Frazier method, forming a space S1 that accommodates the tip of the wearer's lower jaw A lower pocket portion 40,
An upper pocket portion that is formed by a sheet member provided at the upper portion of the laminated portion 20 and has an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method, and forms a space S2 that accommodates the wearer's nose 50.

FIG. 2 is a schematic exploded bottom view showing the laminated portion of the mask 100 of the present invention.
The laminated portion 20 includes a laminated body 30 in which an inner sheet 32, a pathogen inactivating layer 34, and an outer sheet 36 are laminated in this order from the wearer side (upper side in the drawing).
A laminated body 30 shown in FIG. 2 includes an inner sheet 32, a pathogen inactivating layer 34, and an outer sheet 36 each having a three-layer structure. As will be described later, the pathogen inactivating layer is preferably composed of a plurality of sheet-like materials. In this case, when the inner sheet and the outer sheet are each one layer, when the pathogen inactivation layer is composed of two layers of sheet-like material, the laminate has a four-layer structure, and the pathogen inactivation layer has three layers. When it is composed of a sheet material of layers, the laminate has a five-layer structure.
For example, the functions and principles of the mask are the same as those of air purifier filters and filtration devices. By using a multilayer structure or having a certain thickness, for example, the following effects can be achieved. As a result, stable use is realized.
(1) Effect of increasing surface area in contact with exhausted gas (2) Creating a bulky state in which air is contained, and lowering the gas flow rate by replacing the air with the exhausted gas Effect (3) The effect of preventing the exhausted gas from bypassing and functioning the filter function efficiently (4) Increasing the frequency of the exhausted gas coming into contact with the pathogen inactivation layer, making the inactivation efficient Effect to do

When the main body portion does not have a replacement sheet member described later, the inner surface sheet 32 is used in a state of being in contact with the wearer at the time of wearing.
The material of the inner surface sheet 32 is not particularly limited as long as the air permeability according to the Frazier method of the laminated body 30 described later is 15 cm ³ / (cm ² · s) or more. For example, non-woven fabrics such as dry nonwoven fabrics, wet nonwoven fabrics, spun melt nonwoven fabrics, and spun lace nonwoven fabrics; synthetic fiber fabrics; knits can be used. Among them, a material having a low basis weight is preferable in that air permeability is excellent.
Among these, it is one of the preferred embodiments that the inner sheet 32 is porous. Specific examples of the porous material include a net-like, mesh-like or gauze-like nonwoven fabric; an opening film; a net, mesh or lace obtained by interweaving or knitting synthetic fiber filaments. When the inner surface sheet 32 is porous, the contact area with the skin is reduced, and the wearer feels better.
In addition, it is one of preferred embodiments that the inner surface sheet 32 has a bowl-shaped uneven structure on the surface. In this aspect, since the contact area with the skin is reduced and the cushioning property is provided, a so-called “soft touch” feel can be obtained, and the wearer's wearing feeling is excellent.
Furthermore, it is one of the preferable embodiments that the inner sheet 32 is a funnel-type opening film as proposed by the present inventor in Japanese Patent Laid-Open No. 2002-238946. In this aspect, there is an effect of distributing and rectifying the discharged exhaled air, and it becomes easy to efficiently use the entire surface of the laminate 30.

The material constituting the inner sheet 32 may be hydrophilic or hydrophobic.
As a material constituting the inner surface sheet 32, a material subjected to antifouling treatment, antibacterial treatment, water repellent treatment, or the like can be used.
Since the material which comprises the inner surface sheet | seat 32 may be ingested into a body from a wearer's mouth, it is preferable that it is a highly safe thing.
The material constituting the inner sheet 32 is preferably a material that does not generate dust, fallen fiber scraps, or the like due to friction during use.
The material constituting the inner surface sheet 32 is preferably a material that is in contact with the lips of the wearer and is less likely to be adhered or soiled by cosmetics such as body fat and lipstick.
It is preferable that the material constituting the inner surface sheet 32 is one in which pathogens and resident bacteria discharged from the wearer on the surface are difficult to propagate.

In FIG. 2, the inner surface sheet 32 is disposed over the entire surface of the laminated body 30, but can also be partially disposed, for example, disposed only on a portion of the laminated body 30 that abuts on the periphery of the lip. .
In FIG. 2, the inner sheet 32 is simply laminated on the pathogen inactivating layer 34, but the surface of the inner sheet 32 and the surface of the pathogen inactivating layer 34 are joined and integrated. May be.
When the inner surface sheet 32 and the pathogen inactivating layer 34 are simply laminated, as described later, it is easy to separate the two and make the inner surface sheet 32 exchangeable. For example, when the mask of the present invention is continuously used for a long time, this aspect maintains a clean state by replacing the inner sheet 32 when removing the mask for meal, bathing, etc. An excellent wearing feeling of unused items can be obtained.

It is one of the preferable embodiments of the present invention that the main body portion further has a detachable replacement sheet member on the wearer side of the inner surface sheet of the laminated portion.
The material of the replacement sheet member is not particularly limited as long as the permeability of the laminate 30 described later is 15 cm ³ / (cm ² · s) or more according to the fragile method, but the material is excellent in water absorption. Is preferred. Examples of the material having excellent absorbency include cotton gauze and non-woven fabric (for example, Benlyse manufactured by Asahi Kasei Co., Ltd. and TCF manufactured by Phthamura Chemical Co., Ltd.).
One sheet member for replacement may be used, or a plurality of sheet members may be used in an overlapping manner. Among these, one or two is preferable.
The replacement sheet member preferably has a size and a position capable of covering the periphery of the wearer's mouth when worn. In the case of having a replacement sheet member, it has a hygienic effect of maintaining a clean state, and also reduces the speed at which exhaled air with pressure exhausted from the mouth collides with the laminate, and also has an effect as a cushioning material. Play. In a mask having a highly breathable layered portion like the mask of the present invention, when exhaled air is directly discharged to the layered portion, the amount of exhaled air passing through the portion becomes excessive, and the load of inactivation at the portion is increased. Because it increases, the probability that a non-inactivated pathogen will pass may increase. In the case of having a replacement sheet member, a cushioning material is provided in the vicinity of the exhalation discharge portion, so that exhalation does not shift to a part of the laminated portion of the mask and easily spreads over the entire surface of the laminated portion. Inactivation of becomes more efficient.
The replacement sheet member can be reused by washing. However, it is preferable that the replacement sheet member be sealed and sanitized because it is a site that easily becomes dirty and easily attaches viruses.
For example, when the main body portion has a replacement sheet member, for example, when the mask of the present invention is continuously used for a long time, by replacing the replacement sheet member when removing the mask for meal, bathing, etc. In addition to maintaining a clean state, it is possible to obtain an excellent wearing feeling of unused products. Especially, since the said effect can be acquired when it is difficult for an inner surface sheet to isolate | separate from another member (for example, pathogen inactivation layer), it is preferable.

The material of the outer sheet 36 is not particularly limited as long as the air permeability according to the Frazier method of the laminate 30 described later is 15 cm ³ / (cm ² · s) or more. For example, non-woven fabrics such as dry nonwoven fabrics, wet nonwoven fabrics, spun melt nonwoven fabrics, and spun lace nonwoven fabrics; synthetic fiber fabrics; knits can be used. Among these, those having a dense structure and having relatively fine constituent fiber fineness capture the splashes when the wearer's breath is discharged to the outside, and also when the wearer inhales the outside air It is preferable because it captures dust and the like.
Among these, spun melt nonwoven fabrics of synthetic fibers such as PE, PP, PET, EVA, PE / PP composite fibers, and PE / PET composite fibers are preferable, and SMS and SMMS that are melt blown multilayers are more preferable.

The material constituting the outer sheet 36 may be hydrophilic or hydrophobic.
As a material constituting the outer sheet 36, a material subjected to antifouling treatment, antibacterial treatment, water repellent treatment, or the like can be used.
The material constituting the outer sheet 36 preferably has a smooth surface so that the surface is not easily soiled even if the surface is touched by hand when the mask of the present invention is attached or detached.
The material constituting the outer sheet 36 is preferably a material that does not generate dust, fluff, etc. due to friction during use.

In FIG. 2, the outer sheet 36 is disposed over the entire surface of the stacked body 30, but may be partially disposed.
In FIG. 2, the outer sheet 36 is simply laminated under the pathogen inactivating layer 34, but the surface of the outer sheet 36 and the surface of the pathogen inactivating layer 34 are joined and integrated. May be.

The pathogen inactivation layer 34 is a layer for inactivating the pathogen.
In the present invention, the pathogen is a general term for microorganisms, viruses and the like that cause respiratory diseases such as tuberculosis, influenza, pneumonia, bronchitis, and pharyngitis. Specific examples include bacteria, molds, rickettsias, mites, and viruses.
In the present invention, inactivation means detoxification, detoxification, neutralization, etc. of the pathogen. Specific examples of inactivation include filtration removal, adsorption removal, heat denaturation, chemical denaturation, and antibody reaction. Hereinafter, these means will be described in more detail.

(I) Filtration and removal Filtration and removal are means for removing a pathogen by filtering through a filter having pores smaller than its size.
Since viruses have a size of about 100 nm or less, it is preferable to use, for example, a pore film or microporous film having pores of several tens of nm as a filter because it can be reliably filtered. When the filter is folded or formed into an accordion shape, the surface area becomes large, and it becomes easy to increase the filtration efficiency while keeping the air permeability of the laminate 30 by the fragile method to 15 cm ³ / (cm ² · s) or more. Therefore, it is preferable.

(Ii) Adsorption removal Adsorption removal is a means for adsorbing and removing pathogens on adsorbents such as porous inorganic substances. Adsorption removal is generally preferable in that it not only removes pathogens but also has a deodorizing effect.
Examples of the porous inorganic material include at least one selected from the group consisting of zeolite, dolomite, apatite, hydroxyapatite, activated carbon, activated alumina, titanium dioxide, shirasu balloon, silica gel, and molecular sieve. Among these, at least one selected from the group consisting of zeolite, dolomite, apatite, hydroxyapatite, activated carbon, and activated alumina is preferable.
As a specific method of adsorption removal, the porous inorganic substance is generally in the form of powder or particles, so the porous inorganic substance is supported on a sheet-like substrate and fixed so as not to be detached. It is preferable to use it. A more specific method used in the present invention will be described later.

(Iii) Thermal denaturation Thermal denaturation is a means for denaturing proteins by treating pathogens composed of proteins at high temperatures, for example, at 100 ° C. or higher.

(Iv) Chemical denaturation Chemical denaturation is a means for denaturation by reacting organic substances, metal ions and the like with pathogens.
Examples of the organic substance include cresol solution, formalin solution, popidone iodine, and triclosan used as antiviral agents, antibacterial agents, bactericides, disinfectants, and the like.
Examples of the metal ions include at least one selected from the group consisting of Cu ions, Ag ions, Zn ions, Ti ions, Au ions, Pt ions, Mn ions, Fe ions, and Zr ions. Among these, at least one selected from the group consisting of Cu ions, Ag ions, Zn ions, and Ti ions is preferable.
As a specific method of chemical modification, it is preferable in the present invention to use a sheet-like base material, which is impregnated with organic matter, metal ions, etc., and fixed by coating or the like.

In the case of using metal ions, the method used in the state of being supported on the adsorbent and stabilized is that the pathogen is inactivated by both adsorption removal by the adsorbent and chemical modification by metal ions, and metal It is preferable at the point which can prevent that an ion contacts a wearer directly. As the adsorbent, those used for the above-described adsorption removal can be suitably used.
Examples of the stabilized metal ions supported on the adsorbent include those used as antibacterial agents. Specifically, for example, Zeomic (manufactured by Sinanen Zeomic Co., Ltd.), Bact killer (manufactured by Fuji Chemical Co., Ltd.), and ATOMYBALL (manufactured by JGC Catalysts & Chemicals Co., Ltd.) can be mentioned. Examples of supported metal ions include Cu ions, Ag ions, Zn ions, and Ti ions (supported as TiO ₂ ).
A liquid in which Pt is colloidal is also preferably used.
Metal ions react with sulfur-containing amino acids such as cystine, which are constituents of proteins and RNA. In the case of influenza virus, the envelope of the virus is covered with an envelope. Since the envelope contains a large amount of cystine, metal ions attack the envelope and chemically denature the virus.

(V) Antibody reaction The antibody reaction is a means for generating an antibody in a wearer by a vaccine or the like and causing an antigen-antibody reaction with a pathogen.
Since the antigen-antibody reaction is based on species specificity, it is difficult to cope with varieties etc. with one vaccine, but for example, a specified pathogen that is expected to be in a pandemic state In some cases, it is useful to prevent pandemics by using a vaccine that raises antibodies corresponding to the pathogen.
As a specific method of the antibody reaction, it is preferable to use a sheet-like base material that is fixed by impregnation with a vaccine or the like by coating.

The pathogen inactivation layer is not particularly limited in configuration as long as it has a function to inactivate pathogens, but is preferably composed of one or more sheet-like materials, and a plurality of sheet-like materials. More preferably, it is comprised.
In this case, it is one of preferred embodiments that at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is folded. In this aspect, the folding ratio obtained by dividing the area before folding of the folded sheet-like material by the area in the folded state is preferably 1.5 or more, and 2.0 or more. It is more preferable that
In addition, at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer preferably has a thickness of 0.5 mm or more under no load and an apparent specific gravity of 0.1 or less. One. When the pathogen inactivating layer is composed of one sheet-like material, the thickness under no load is preferably 1.0 mm or more and / or corrugated.
Moreover, it is one of the preferable aspects that at least 1 sheet | seat material which comprises a pathogen inactivation layer is a nonwoven fabric using the synthetic fiber which has antiviral performance.
In addition, at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is one of the preferred embodiments that is a hydrophilic nonwoven fabric using cellulosic fibers. In one preferred embodiment, at least one of the plurality of sheet-like materials constituting the layer is a nonwoven fabric using ultrafine cellulose.
Moreover, it is one of the preferable aspects that at least 1 sheet | seat-like material which comprises a pathogen inactivation layer is a sheet | seat containing the inorganic substance which carry | supported the metal ion. In this embodiment, it is one of the more preferable embodiments that the sheet containing the inorganic substance carrying the metal ions is a nonwoven fabric using ultrafine cellulose.

In the present invention, as a pathogen inactivation layer, it is preferable to use at least one of the following inactivation sheets (a) and (b).
(A) Inactivated sheet composed of non-woven fabric containing antibacterial and / or antiviral fiber Non-woven fabric containing antibacterial and / or antiviral fiber is particularly limited For example, regenerated fiber (for example, regenerated cellulose fiber), semi-synthetic fiber (for example, acetate fiber), synthetic fiber, and inorganic fiber are mentioned.
Fibers having antibacterial and / or antiviral properties can be used as they are, and those having no antibacterial and / or antiviral properties contain substances having antibacterial and / or antiviral properties. Thus, antibacterial and / or antiviral properties can be imparted.
As a substance having antibacterial and / or antiviral properties, for example, a substance used for the above-mentioned chemical modification can be used.
Specific examples of fibers having antibacterial and / or antiviral properties include fibers having antibacterial properties such as rayon fibers containing chitosan, rayon fibers containing TiO ₂ supporting Zn ions; zeolite supporting Cu ions And synthetic fibers having antibacterial and antiviral properties such as polyester fibers containing acryl and acrylic fibers containing hydroxyapatite supporting Ag ions.
The method of imparting antibacterial and / or antiviral properties to the fiber is not particularly limited. For example, an inorganic material supporting metal ions is dispersed in a fiber spinning dope, or an inorganic master batch is prepared and mixed. Thereafter, a method of forming the fiber by means of wet spinning, dry spinning, melt spinning, or the like can be used.

Nonwoven fabrics containing fibers having antibacterial and / or antiviral properties can be produced using fibers having antibacterial and / or antiviral properties as raw materials. As the fiber having antibacterial and / or antiviral properties, any of a Tow shape, a filament shape, and a short fiber shape (staple shape) can be used.
The fibers used for the nonwoven fabric preferably have a fineness of 3d or less, and more preferably 2d or less. Within the above range, the surface area becomes sufficiently large, and the efficiency of inactivating pathogens becomes higher.
If the fineness of the fibers used in the nonwoven fabric is about 0.1d, it becomes difficult to form a web with a card machine. Therefore, until the card machine passes, the fineness is so thick that it is finely divided by a high-pressure water stream. Is preferred. Specific examples of the split fibers include E91 manufactured by Unitika.
The fiber used for the nonwoven fabric preferably has a fiber length of 75 mm or less, more preferably 60 mm or less, and preferably 15 mm or more. If the fiber length is 75 mm or less, the nonwoven fabric tends to be uniform. If the fiber length is 15 mm or more, lint is unlikely to occur.
The nonwoven fabric preferably has a basis weight of 15 to 60 g / m ² . When it is in the above range, the cost is reduced and the air permeability can be easily controlled.
The nonwoven fabric preferably has an apparent specific gravity of 0.1 g / cm ³ or less, and more preferably 0.07 g / cm ³ or less. When it is in the above range, the bulkiness and surface area are sufficiently maintained, and the efficiency of inactivating pathogens becomes higher.
The nonwoven fabric preferably has a thickness under no load of 0.5 mm or more, and more preferably 1.0 mm or more. Within the above range, the surface area becomes sufficiently large, and the efficiency of inactivating pathogens becomes higher.

Although the manufacturing method of the nonwoven fabric containing the fiber which has antibacterial property and / or antiviral property is not specifically limited, For example, the fiber (A) of a short fiber-like antibacterial property and / or antiviral property, and antibacterial property and / or Or the fiber (B) which does not have antiviral property is mixed, the web is formed with a card machine, and the method of making this into a nonwoven fabric by hydroentangling this with a high-pressure water stream is mentioned suitably.
The mixing ratio of the fiber (A) and the fiber (B) varies depending on the degree of inactivation of the fiber (A) with respect to the pathogen. For example, the fiber (A) is made of a zeolite carrying Cu ions. When the polyester fiber is contained, the ratio of the mass of the fiber (A) to the total mass of the fibers (A) and (B) is preferably 20 to 80%.
The fiber (B) is not particularly limited. For example, hydrophilic fibers such as rayon, lyocell, PVA, acetate, and cotton; synthetic fibers such as PE, PP, PET, and EVA; composites such as PE / PP and PE / PET Fibers: Easily split fibers obtained by further combining composite fibers.

When a card web of mixed fibers of a predetermined amount of fibers (A) and fibers (B) is hydroentangled as it is to make a nonwoven fabric, if the whole is hydroentangled with a high basis weight, the density tends to become high and dense. It is one of the preferred embodiments that fine mesh patterning is carried out on a thin web having a thickness of 20 g / m ² or less and superposed on two or more multilayers.

Another preferred embodiment is a method of laminating a web of mixed fibers of fibers (A) and fibers (B) on a thin base of a filament nonwoven fabric such as SB or SMS in a net shape by water flow or needling. (Hereinafter, the nonwoven fabric obtained by this method is referred to as “water-flow implanted nonwoven fabric”). Although the nonwoven fabric used as a base material is not specifically limited, For example, the opening net of SB nonwoven fabric (for example, basis weight 13g / m < ² >) which used PP resin as a raw material can be used suitably. The web of the mixed fiber is not particularly limited. For example, a web using polyester fiber containing zeolite supporting Cu ions as the fiber (A) (for example, fineness 1.5d, fiber length 42 mm, basis weight 30 g / m ^2). ) Can be suitably used.
In this embodiment, it is possible to use a method in which a web of mixed fibers is superposed on a spread net and subjected to high-pressure hydroentanglement treatment on the entire surface. Further, when the entanglement device described in Japanese Patent Application Laid-Open No. 2007-277748 proposed by the present inventors is used, a very bulky nonwoven fabric in which saddle-like, corrugated entanglement portions and unentanglement portions are alternately arranged Is preferable because it can be manufactured.

Further, a method of manufacturing a nonwoven fabric having a three-layer structure by laminating a fibrous web on a base material with a water flow and further laminating another fiber web on the opposite surface of the base material with a water flow is also a preferred embodiment. One. As the structure of such a nonwoven fabric and a method for producing the same, those described in JP-A-7-138858 and JP-A-7-265397 proposed by the present inventors can be used.
The nonwoven fabric of this aspect can differ in the degree of antibacterial and / or antiviral properties, pathogens that are the target of antibacterial and / or antiviral properties, etc., in the two types of fiber webs.
For example, a relatively weak fiber web having a degree of antibacterial and / or antiviral properties can be disposed on the inside, and a relatively strong fiber web can be disposed on the outside. Thereby, the inactivation effect with respect to a pathogen can be acquired, suppressing the effect | action with respect to a wearer.
In addition, in the two types of fiber webs, the pathogen that is the target of antibacterial and / or antiviral properties can be made different so that the inactivation effect can be exerted on more pathogens.

(B) Inactivation sheet composed of a nonwoven fabric composited with ultrafine cellulose or a nonwoven fabric containing ultrafine cellulose and an inorganic substance supporting metal ions Deactivation composed of a nonwoven fabric combined with ultrafine cellulose A sheet | seat is comprised with the nonwoven fabric using ultrafine cellulose, such as the nonwoven fabric by which the surface was coated with ultrafine cellulose.
Nonwoven fabrics coated with ultrafine cellulose on the surface have excellent breathability and at the same time excellent biobarrier properties. Among these, non-woven fabrics coated with fine cellulose on the surface in a mixed solvent system of organic solvent and water are porous, maintain high air permeability, and can stably adsorb pathogens containing viruses in their pores. it can. As the nonwoven fabric coated on the surface with ultrafine cellulose, for example, those described in Japanese Patent Application Laid-Open Nos. 10-248872 and 2007-230139 proposed by the present inventor can be used.
Ultrafine cellulose is a hydrophilic fine fiber, and examples thereof include bacterial cellulose, which is cellulose derived from microorganisms, and microfibrillated cellulose (MFC) obtained by refining wood pulp. For example, those described in International Publication No. 2004/009902 pamphlet can be suitably used.
The ultrafine cellulose usually has a diameter of 20 to 100 nm, a fiber length of 20 to 100 μm, an extremely large specific surface area, and a fine porous structure. Ultrafine cellulose has a strong hydrogen bonding force and bonds extremely firmly when dried, but it is extremely stable in an aqueous dispersion or a mixed solvent dispersion of an organic solvent and water, and exhibits a strong structural viscosity and is an excellent coating material. It can be.
As described above, the nonwoven fabric composited with ultrafine cellulose has an extremely large specific surface area and a fine porous structure, and thus has an inactivation effect by filtration removal and adsorption removal. In order to obtain the effect of inactivation by denaturation, it can be combined with disinfectants such as popidone iodine, triclosan and chlorhexidine gluconate, bactericides; antibacterial agents such as chitosan and metal ions. Specifically, for example, the composite can be formed by a method in which an aqueous solution of a disinfectant, a disinfectant, an antibacterial agent, or the like is contained in a dispersion of ultrafine cellulose and then coated on the nonwoven fabric.

An inactivated sheet composed of a nonwoven fabric containing ultrafine cellulose and an inorganic material supporting metal ions is an ultrafine cellulose such as a nonwoven fabric coated on the surface with a mixture of ultrafine cellulose and an inorganic material supporting metal ions. It is comprised with the nonwoven fabric using.
Such a nonwoven fabric has high air permeability, stably adsorbs pathogens such as viruses, inactivates them efficiently, and also has the effect of suppressing odors by adsorbing various odor components. Play.
The nonwoven fabric coated on the surface with a mixture of ultrafine cellulose and an inorganic substance supporting metal ions is a mixture of ultrafine cellulose having a large structural viscosity or a mixed dispersion of an organic solvent and water. Inorganic materials such as dolomite, silica, activated carbon, etc .; fine metal powders such as Fe, Au, Ag, Zn, etc .; dispersed inorganic materials etc. supporting metal ions to obtain a slurry of a mixture of ultrafine cellulose and inorganic materials supporting metal ions The slurry can be obtained by coating the surface of the nonwoven fabric.
In this case, the amount of ultrafine cellulose is preferably 1 g / m ² or more, and preferably 10 g / m ² or less. When it is in the above range, uniform coating is facilitated, and a bulky inactivated sheet can be easily obtained.
Moreover, the amount of the inorganic substance supporting metal ions is preferably 2 to 20% by mass with respect to ultrafine cellulose, for example, in the case of zeolite supporting Ag ions. Within the above range, the inactivation effect becomes more excellent, and the cost can be suppressed.

As the nonwoven fabric used for the inactivated sheet comprised of the nonwoven fabric containing ultrafine cellulose and an inorganic substance carrying metal ions, the following nonwoven fabrics (i) to (iii) are preferably used.
(I) A spun melt nonwoven fabric such as SB, SMS, SMMS or the like obtained by melt-peeling PE, PP, PET, or a composite polymer thereof, and a hydrophobic nonwoven fabric having a basis weight of about 10 to 30 g / m ^2. When the surface is processed with a slurry of a mixture of ultrafine cellulose and Ag ion-supported zeolite as a base material, the whole is hydrophilized by the ultrafine cellulose, and static electricity accumulation properties are lost.
When this non-woven fabric is used, the obtained inactivated sheet is thin and relatively low in air permeability, and therefore, it is preferable to carry out processing to increase the specific surface area. Specific examples include pleating, accordion-like folding, crepe paper-like processing, and corrugated-like folding.

(Ii) A non-woven fabric containing cellulosic components such as tissue and wet non-woven fabric, and a hydrophilic non-woven fabric having a basis weight of about 10 to 30 g / m ^2. When the surface treatment is performed with a slurry of the mixture, ultrafine cellulose and the cellulose-based component of the nonwoven fabric form hydrogen bonds, and an extremely stable coating layer is obtained.
When this non-woven fabric is used, the obtained inactivated sheet is hard, thin, and relatively low in air permeability. Therefore, it is preferable to perform processing to increase the specific surface area. Specific examples include pleating, accordion-like folding, crepe paper-like processing, and corrugated-like folding.

(Iii) Non-woven fabric such as air-through nonwoven fabric, spun lace nonwoven fabric, hydroplanted nonwoven fabric, rayon spunbond (for example, TCF manufactured by Phutamura Chemical Co., Ltd.), and a bulky and porous nonwoven fabric having a basis weight of about 20 g / m ² or more Using the non-woven fabric as a base material, surface treatment with a slurry of a mixture of ultrafine cellulose and zeolite supporting Ag ions makes the composite of ultrafine cellulose and zeolite supporting Ag ions entangled with the constituent fibers of the nonwoven fabric. Thus, an inactivated sheet having excellent air permeability and a large internal specific surface area can be obtained.
When this nonwoven fabric is used, the obtained inactivated sheet has a large specific surface area, and therefore can be used without performing a process for increasing the specific surface area. Also good.

  As shown in FIG. 2, the laminate 30 has an inner sheet 32, a pathogen inactivating layer 34, and an outer sheet 36 laminated in this order from the wearer side. Members other than the sheet, the pathogen inactivating layer, and the outer sheet may be laminated.

  The lamination method of the laminated body 30 is not particularly limited.

The laminate 30 has an air permeability of 15 cm ³ / (cm ² · s) or more according to the Frazier method.
As a result of intensive studies on the leaking of the breath of the mask, the present inventor has found that a large portion of the breath leaks between the mask and the wearer's skin in the currently marketed mask, and It has been found that there are mainly three causes as follows.
The first is that there is a gap between the wearer's face and the mask. The face of the wearer has a complicated three-dimensional shape, and there are great individual differences. For this reason, a gap is easily generated between the wearer's face and the mask.
Secondly, the air permeability of the mask body is poor. If the air permeability of the mask body is good, even if there is a slight gap between the wearer's face and the mask, substantial leakage of exhalation will be reduced. It concentrates on the gap without resistance, and the leak increases even if the gap is small.
Third, the air permeability of the material that blocks the gap between the wearer's face and the mask is high. In general, both sides of the nose where gaps are likely to occur are blocked with a cushioning material, a sealing material, or the like, but depending on the material, it may cause expiration. In conventional masks, urethane foam and non-woven mats with open cells are used as cushioning materials and sealing materials to prevent inhalation of foreign substances from the outside, but these are highly breathable and cause leakage. It has become.
Based on the above examination results, the inventor uses the Frazier-type air permeability (unit: cm ³ / (cm ² · s)) as an indicator of the air permeability of the mask body, and evaluates the leakage of breath. In addition to finding out that it can be appropriately performed, the laminate 30 has a breathability of 15 cm ³ / (cm ² · s) or more in terms of air permeability according to the Frazier method, and is provided with a lower pocket portion having a low breathability described later. The upper pocket portion having low air permeability described later, a tape member that can be deformed along the shape of the wearer's nose, and the wearer's nose so as not to cause a gap between the wearer's face and the mask The present invention has been completed by providing at least one selected from the group consisting of wire members that can be deformed along the shape.
If the Gurley method, which is generally used as an index of air permeability, is used as an index, the wearer feels stuffy even at a level of 2-3 s / 100 cm ³ which is the lower limit of the measurement. When the level exceeds 10 s / 100 cm ^3, breathing becomes almost impossible. Therefore, the measured value by the Gurley method cannot be used as an index of air permeability of the main body of the mask of the present invention.

The inventor has various commercially available masks, the mask of the present invention (obtained in Example 1), and the mask of the present invention in which a breathable material is incorporated in the lower pocket portion and the upper pocket portion. The ratio of air leaking from the gap between the mask body and the wearer's skin (leak rate) was measured.
FIG. 12 is a schematic diagram showing an apparatus for measuring the leak rate of the mask, FIG. 13 is a schematic diagram showing an apparatus for preparing alcohol-containing air used for measuring the leak rate of the mask, and FIG. It is a schematic diagram which shows the mask mounting jig used for the measurement of the leak rate of FIG. 14, (A) is a top view, FIG. (B) is a top view at the time of a measurement. The arrow in FIG. 14 (B) shows the flow of ethanol-containing air.
Specifically, the mask leak rate is measured by using a mask mounting jig 140 (about 5 cm × about 1 cm) in which the face mannequin whose surface shown in FIG. 14 is made of silicon rubber is crafted in the apparatus shown in FIG. A mask (a variety of commercially available masks, the mask of the present invention, and the mask of the present invention incorporating a breathable material in the lower pocket portion and the upper pocket portion) 160 After each mounting, ethanol-containing air is continuously flowed from the rubber balloon 136 to the back side of the opening of the mask mounting jig 140 using the gas supply nozzle 144, and the ethanol-containing air that has permeated the mask 160 is collected by exhaust. The ethanol was collected by the funnel 146, and the ethanol concentration in the exhaust collection funnel 146 was measured by the ethanol detector tube 148. The air in the exhaust collection funnel 146 was continuously sucked by the air pump 150. When the gas permeability (A) of the mask main body is large and the leak rate (B) is small, the air in the exhaust collection funnel 146 is mostly occupied by the air transmitted through the main body, and the mask 160 and the exhaust gas are exhausted. Since the degree of dilution by the outside air entering from the gap with the inlet of the collection funnel 146 is low, high-concentration ethanol is detected, but the gas permeability (A) is small and the leak rate (B) is large. Since the degree of dilution by increases, low concentration ethanol is detected.
The gas permeability (A) is a percentage of the detected ethanol concentration when the mask 160 is mounted and measured with respect to the ethanol concentration in the exhaust collection funnel 146 when measured without mounting on the mask mounting jig 140. (See the following formula.)

  A (%) = (ethanol concentration with mask on / ethanol concentration without mask) x 100 (%)

  Further, the leak rate (B) is obtained by the following formula.

  B (%) = 100-A (%)

A more specific measurement procedure is shown below.
(1) Preparation of ethanol-containing air and preparation of a rubber balloon filled with ethanol-containing air As shown in FIG. 13, a glass tube 130 with a stopcock is installed at the top of the head, with a nearly cubic lid with a side length of about 50 cm. A methacrylic resin box 131 was prepared. At the bottom of the box 131, five petri dishes 132 each having a filter paper having a diameter of about 10 cm are arranged, and about 30 mL each of 75 mass% ethanol aqueous solution prepared with pharmacopeic alcohol and distilled water is poured into the petri dish 132, Sealed with a lid and left in a room at 25 ° C. for about 24 hours to fill the box 131 with ethanol-containing air.
A tube 133 made of urethane rubber is connected to the glass tube 130 with stopcock, and the tube 133 is connected to the rubber balloon 136 via the air pump 134 and the glass tube 135 with stopcock, and about 2 L of ethanol-containing air is supplied to the rubber balloon 136. Was filled. After filling, the open / close valve of the glass tube 135 with stopcock was closed. Two rubber balloons 136 were prepared, one for sample measurement and the other for reference concentration measurement under no load.
Into the box 131 after collecting the ethanol-containing air, air corresponding to the reduced pressure was allowed to flow and left for several hours to prepare for the next measurement.

(2) Setting of sample mask and setting of exhaust gas collecting funnel The mask mounting jig 140 is formed with an elliptical opening having a minor axis of 1 cm and a major axis of 5 cm in the mouth part of the face mannequin, and a funnel-shaped gas supply on the back side. Obtained by connecting the nozzles directly.
The mask 160 was mounted on the mask mounting jig 140. In the case of a commercially available mask, use a method according to the instruction manual for the mask. In the case of the mask of the present invention, the lower pocket space is the tip of the lower jaw, and the upper pocket space is the nose. Were to be accommodated respectively.
After mounting the mask 160, the edge of the suction port of the exhaust gas collection funnel 146 was positioned close to the mask 160 in a range where it did not contact the surface of the mask 160. The edge of the suction port of the exhaust collection funnel 146 has an elliptical shape of about 6 cm in length and about 10 cm in width, and has a three-dimensional shape with a concave curve along the face shape at the part that hits the nose and chin. Therefore, the suction port almost covers the main body of the mask 160, and most of the air exhausted from the main body of the mask 160 is collected. The internal volume of the exhaust collection funnel 146 was about 250 mL, and an exhaust air pump 150 was connected to the exhaust port of the exhaust collection funnel 146 to exhaust air at a rate of 3 L / min. Further, a sampling opening / closing hole was provided in front of the exhaust port of the exhaust collection funnel 146, and an ethanol detector tube 148 was inserted.

(3) Measurement of gas permeability A rubber balloon 136 filled with ethanol-containing air is attached to the supply port of the gas supply nozzle 144 of the mask mounting jig 140 mounted with the mask 160 via a glass tube 135 with a stopcock. The on-off valve of the attached glass tube 135 was opened, and the air pump 150 was operated to blow ethanol-containing air from the opening of the mask mounting jig 140 toward the mask 160. The supply time of ethanol-containing air was approximately 15 seconds.
The air pump 150 was stopped 10 seconds after the start of the supply of the ethanol-containing air, and was left still for 10 seconds in order to equalize the ethanol concentration in the exhaust collection funnel 146. Thereafter, the ethanol concentration in the exhaust collection funnel 146 was measured by an ethanol detector tube 148 inserted into the sampling opening / closing hole.
Next, only the mask 160 is removed from the mask mounting jig 140, and the same operation as described above is performed using another prepared rubber balloon filled with ethanol-containing air, so that the reference ethanol concentration at no load is set. It was measured. The gas permeability and leak rate were calculated by the calculation method described above.
The measurement was repeated 5 times for each mask, and the measurement results including the fluctuation range were used.
The results are shown in Table 1.

As shown in Table 1, the gauze mask (No. 1) had a leak rate of 15% or less because of the good air permeability of the mask body, although there were gaps on the top and bottom and left and right. However, when a high-density melt-blown nonwoven fabric layer was added to the gauze mask (No. 2), the air permeability of the mask main body portion deteriorated, and the leak rate was doubled or more.
In addition, the three-dimensional (super three-dimensional) mask (No. 3) is rigid and has large gaps in the main body, and since the high-density melt-blown nonwoven fabric is used as a constituent material, the air permeability of the mask main body is poor, and leakage occurs. The rate was 50% or more. When the high-density meltblown nonwoven fabric was removed from this mask (No. 4), the leak rate was halved.
The mask (No. 5) of the present invention is composed of a sheet member having a low air permeability (a laminate of a PE non-woven fabric (12 g / m ² basis weight) on a PE film) using a laminate having excellent air permeability for the main body. Since the lower pocket portion and the upper pocket portion were provided, the leak rate was extremely low. However, when the sheet member of this mask was composed of a highly breathable sheet member (SMS nonwoven fabric (weight per unit area: 12 g / m ² )) (No. 6), the leak rate was twice or more.

The laminate 30 has an air permeability of 15 cm ³ / (cm ² · s) or higher, preferably 20 cm ³ / (cm ² · s) or higher, preferably 30 cm ³ / (cm ² · s). The above is more preferable. Even if the wearer exhales a large amount of gas within the above range, the rate of exhalation exhaled from between the body 10 and the wearer's skin is reduced, so that the wearer can send to others. Infection such as influenza can be suppressed. Moreover, when it is the said range, when a wearer breathes, it is hard to feel breathlessness.

  The stacked unit 20 may have a member other than the stacked body 30.

The lower pocket portion 40 is provided at the lower portion of the laminated portion 20 and is configured by a sheet member having an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method and accommodates the wearer's lower jaw tip. A space S1 is formed.
The material of the sheet member used for the lower pocket 40 is not particularly limited as long as the air permeability according to the Frazier method is 2 cm ³ / (cm ² · s) or less. Materials that are soft, thin and flexible are preferred. Specifically, for example, a film such as PE, EVA, PP, etc .; an elastic film such as polyurethane having elasticity, SEBS, etc .; a microporous film used for a back sheet of a paper diaper and a non-woven fabric for improving the touch A laminate is preferably used.
The sheet member preferably has a thickness of 50 μm or less, more preferably 30 μm or less, and preferably 10 μm or more. If it is in the above range, it is flexible and hardly affects the rigidity of the main body 10 as a whole, and the strength of the lower pocket 40 is sufficient.

The lower pocket part 40 is provided in the lower part of the lamination | stacking part 20 so that the space S1 which accommodates the front-end | tip part of a wearer's lower jaw may be formed.
Specifically, the pocket-shaped space S <b> 1 can be formed by joining the sheet member constituting the lower pocket portion 40 and the laminated portion 20.
The bonding method is not particularly limited, and examples thereof include hot melt, pressure-sensitive adhesive, ultrasonic seal, and heat seal. Further, a part of the members constituting the laminated portion 20 may be folded back at the lower end of the laminated portion 20 to form the lower pocket portion 40, whereby the sheet member and the laminated portion 20 may be in a combined state.
For example, a part of the member constituting the laminated portion 20 is folded at the lower end of the laminated portion 20 and used as a sheet member, and the connecting portion is indicated by the shaded portion in FIG. By combining with the surface of the lower portion of the laminated portion 20 from the vicinity of the lower edge of the sheet member constituting the pocket portion 40 to the vicinity of the left and right edges, only the upper edge of the sheet member is the surface of the laminated portion 20. Thus, a pocket-shaped space S1 can be formed by the sheet member and the laminated portion 20. In particular, like the joint portion indicated by the shaded portion in FIG. 1B, it is coupled to the surface of the lower portion of the laminated portion 20 on both the left and right sides of the center portion of the sheet member constituting the lower pocket portion 40. This is preferable in that the center portion in the left-right direction of the pocket-shaped space S1 is deep and the left and right sides are shallow, and the tip of the lower jaw of the wearer can be stably accommodated.
By connecting the sheet member to the laminated portion 20 in this manner, the lower pocket portion 40 is always in close contact with the wearer's skin and follows the movement of the face, while the laminated portion 20 is always against the wearer's face. It can be held in place.

The lower pocket portion 40 is preferably provided with an elastic material at least at a part of its edge.
The elastic material is not particularly limited. For example, a material in which a plurality of urethane filaments are arranged in a strip shape like leg gathers of a paper diaper, a tape-like polyurethane film, a polyurethane foam foam, a polyester / polyurethane interwoven net, a tube-like shape. Wool-processed nylon and those obtained by coating these with a low-breathing material or a non-breathable material are preferably used.
The method of providing the elastic material on at least a part of the edge portion of the lower pocket portion 40 is not particularly limited, and for example, the elastic material can be provided by bonding the elastic material to the sheet member constituting the lower pocket portion 40. The bonding method is not particularly limited, and the above-described method can be used. In this case, it is one of preferred embodiments that the edge portion of the sheet member constituting the lower pocket portion 40 is folded and bonded with the elastic material sandwiched between the folded portions. This embodiment is particularly preferable when an elastic material that is not composited by being coated with a low-breathing material or a non-breathable material is used. The lower pocket portion 40 can be entirely made of an elastic material.
The elastic material is preferably arranged so as to be positioned below the lower jaw of the wearer when worn. Thereby, the shift | offset | difference of the main-body part 10 by a wearer's face movement etc. is suppressed effectively.

In conventional masks, many attempts have been made to obtain adhesion to the wearer's face by providing an elastic material on the upper and lower ends of the main body.
However, in such a method, the deformation of the main body becomes large at the time of wearing, and the original function of the mask cannot be fully exhibited. As a result, there is a problem that the gap becomes large, and as a result, it is not adopted for products on the market.
As described above, the mask of the present invention is preferably a mode in which an elastic material is provided on at least a part of the edge portion of the lower pocket portion 40 coupled to the laminated portion 20 of the main body portion 10. In this case, adhesion can be obtained very well, and pathogens such as influenza virus can be more effectively prevented from being released to the outside by an infected person with respiratory infection such as influenza.

The upper pocket portion 50 is provided at the upper portion of the laminated portion 20 and is configured by a sheet member having an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method. Form.
The sheet member used for the upper pocket portion 50 is the same as the sheet member used for the lower pocket portion 40 described above.

The upper pocket part 50 is provided in the upper part of the lamination | stacking part 20 so that the space S2 which accommodates a wearer's nose may be formed. As long as the space S2 accommodates a portion around the nostril of the wearer's nose, the space S2 may accommodate a part of the nose or may accommodate the entire nose.
Specifically, the pocket-shaped space S <b> 2 can be formed by coupling the sheet member constituting the upper pocket portion 50 and the laminated portion 20.
The bonding method is not particularly limited, and examples thereof include hot melt, pressure-sensitive adhesive, ultrasonic seal, and heat seal. Further, a part of the members constituting the laminated portion 20 may be folded at the upper end of the laminated portion 20 to become the upper pocket portion 50, whereby the sheet member and the laminated portion 20 may be in a combined state.
For example, a part of the member constituting the laminated portion 20 is folded at the upper end of the laminated portion 20 and used as a sheet member, and the upper portion as shown by the shaded portion in FIG. In the vicinity of the left and right edges of the sheet member constituting the pocket portion 40, by combining with the surface of the upper portion of the laminated portion 20, only the lower edge of the sheet member is not connected to the surface of the laminated portion 20, A pocket-shaped space S <b> 2 can be formed by the sheet member and the laminated portion 20.
By coupling the sheet member to the laminated portion 20 in this manner, the upper pocket portion 50 always adheres to the wearer's skin and follows the movement of the face, while the laminated portion 20 is always attached to the wearer's face. It can be held in place.

The upper pocket portion 50 is preferably provided with an elastic material at least at a part of its edge.
An elastic material is not specifically limited, For example, the thing similar to what is used for the lower pocket part 40 is used suitably.
The method for providing the elastic material on at least a part of the edge of the upper pocket portion 50 is not particularly limited. For example, the elastic material can be provided by bonding the elastic material to the sheet member constituting the upper pocket portion 50. The bonding method is not particularly limited, and the above-described method can be used. In this case, it is one of the preferable embodiments that the edge portion of the sheet member constituting the upper pocket portion 50 is folded back and bonded with the elastic material sandwiched between the folded portions. This embodiment is particularly preferable when an elastic material that is not composited by being coated with a low-breathing material or a non-breathable material is used. The lower pocket portion 50 can be entirely made of an elastic material.
The elastic material is preferably arranged so as to be positioned above the nasal head of the wearer's nose when worn. Thereby, even if there exists a motion of a wearer's face etc., a nostril can be reliably located in the space S2 which the upper pocket part 50 forms.

The sizes of the pocket-shaped spaces S1 and S2 are defined by the width and height of the lower pocket portion 40 and the upper pocket portion 50.
FIG. 3 is a schematic view showing an example of the main body of the mask of the present invention. 3A is a plan view of the main body of the mask of the present invention as viewed from the inside, and FIG. 3B is a vertical end view taken along line IIIB-IIIB in FIG.
The length (L ₀ ) in the left-right direction of the stacked unit 20 is usually 13 to 20 cm.
Left-right direction of the length of the lower pocket portion 40 (L ₁₎ is usually a 12～18Cm. L ₁ preferably satisfies L ₀ ≧ L ₁ .
The length (L ₂ ) in the left-right direction of the upper pocket portion 50 is usually 11 to 16 cm. L ₂ preferably satisfies L ₀ ≧ L ₂ .
The relationship between L ₁ and L ₂ is not particularly limited, but it is preferable that L ₁ ≧ L ₂ considering the length of the wearer's lower jaw tip and the nose in the left-right direction.
The length (W ₀ ) in the vertical direction of the stacked portion 20 is usually 8 to 15 cm.
The length (W ₁ ) in the vertical direction of the lower pocket portion 40 is usually 2 to 10 cm.
The vertical length (W ₂ ) of the upper pocket part 50 is preferably 1 cm or more, more preferably 2 cm or more, and preferably 5 cm or less. Within the above range, when the space S2 of the upper pocket portion 50 accommodates the wearer's nose, it is difficult for a gap to occur.
The relationship between W ₁ and W ₂ is not particularly limited, but it is preferable that W ₁ ≧ W ₂ in consideration of the depth of the tip of the lower jaw of the wearer and the length in the front-rear direction of the nose.
The heights (D ₁ , D ₂ ) at the opening ends of the spaces S1 and S2 can be appropriately set depending on the presence / absence of an elastic material provided at the opening ends, the tension when provided, and the like.
If the size of the space S1 of the lower pocket portion 40 is deep and large, the entire lower jaw of the wearer can be accommodated, and if it is shallow, only the tip of the lower jaw can be accommodated. That is, in the mask of the present invention, the space formed by the lower pocket portion may contain only the tip of the lower jaw of the wearer, and also contains the portion other than the tip of the lower jaw. It may be.
In addition, the spaces S1 and S2 also have an effect of temporarily storing the exhaled breath, that is, an effect as an “air reservoir”.

The lower pocket portion and the upper pocket portion are arranged to be bonded to the laminated portion so that the breath of the wearer passes through the pathogen inactivating layer.
4 and 5 are schematic vertical end views showing another example of the main body of the mask of the present invention.
In the main body 10a shown in FIG. 4A, a laminated body 30a itself in which an inner sheet 32a, a pathogen inactivating layer 34a, and an outer sheet 36a having the same size are laminated constitutes a laminated part 20a. In the main body portion 10a, the inner surface sheet 32a, the lower pocket portion 40a, and the upper pocket portion 50a are joined via the joint portion 38a.
The main body portion 10b shown in FIG. 4 (B) includes an inner sheet 32b, a pathogen inactivating layer 34b having the same size, and an outer sheet 36b larger than these, and the outer sheet 36b is formed of the inner sheet 32b and the pathogen-free layer. The laminated body 30b itself covering the lower end and the upper end of the activation layer 34b and reaching the inner surface sheet 32b constitutes the laminated portion 20b. In the main body portion 10b, the outer sheet 36b, the lower pocket portion 40b, and the upper pocket portion 50b are joined through the joint portions 38b.
As described above, when the pathogen inactivating layer is present over the entire surface in the vertical direction of the laminated part, the lower pocket part and the upper pocket part may be joined to the inner sheet, or joined to the outer sheet. Also good.

The main body 10c shown in FIG. 5A includes an inner sheet 32c and an outer sheet 36c in a lower end direction and an upper end direction of a laminate 30c in which an inner sheet 32c, a pathogen inactivating layer 34c, and an outer sheet 36c are stacked. Each of them extends to constitute a laminated portion 20c. In the main body portion 10c, the sheet members constituting the lower pocket portion 40c and the upper pocket portion 50c cover the extending portion of the inner surface sheet 32c (the portion where the pathogen inactivating layer 34c does not exist on the outside) from the inside. The lower pocket portion 40c and the upper pocket portion 50c are joined via the joint portion 38c.
5B, the inner surface sheet 32d and the outer surface sheet 36d are arranged in the lower end direction and the upper end direction of the laminated body 30d in which the inner surface sheet 32d, the pathogen inactivating layer 34d, and the outer surface sheet 36d are stacked. Each of them extends to constitute a laminated portion 20d. In the main body portion 10d, the sheet members constituting the lower pocket portion 40d and the upper pocket portion 50d cover the extending portion of the inner surface sheet 32d (the portion where the pathogen inactivating layer 34d does not exist on the outside) from the inside. And the lower pocket part 40d and the upper pocket part 50d are joined via the junction part 38d so that it may reach the outer side of the outer surface sheet 36d.
5C, the inner surface sheet 32e and the outer surface sheet 36e are arranged in the lower end direction and the upper end direction of the laminated body 30e in which the inner surface sheet 32e, the pathogen inactivating layer 34e, and the outer surface sheet 36e are stacked. Each of them extends to constitute a laminated portion 20e. In the main body portion 10e, the sheet members constituting the lower pocket portion 40e and the upper pocket portion 50e cover the extending portion of the outer surface sheet 36e (the portion where the pathogen inactivating layer 34e does not exist) from the outside. The lower pocket part 40e and the upper pocket part 50e are joined via the joint part 38e.
As described above, when the pathogen inactivation layer is not present over the entire surface in the vertical direction of the laminated portion, the portion having no pathogen inactivation layer is formed by the sheet member constituting the lower pocket portion and the upper pocket portion. By providing the lower pocket portion and the upper pocket portion so as to cover the body, it is possible to allow the wearer's breath to pass through the pathogen inactivation layer.

  It is preferable that the vicinity of the edges of the lower pocket portion 40 and the upper pocket portion 50 is in close contact with the wearer's face when worn. In order to obtain high adhesion, vegetable butter (for example, cacao butter, shea butter) that can be used as a cosmetic material, petrolatum, olive oil, avocado oil, Seaweed gel etc. can be applied.

  The main body 10 may have members other than the stacked portion 20, the lower pocket portion 40, and the upper pocket portion 50.

  As shown in FIG. 1, the main body portion 10 has an upper pocket portion 50. However, in the mask of the present invention, instead of the upper pocket portion described above, the wear is provided on the upper portion of the laminated portion. It is also possible to use a tape member that can be deformed along the shape of the nose of the wearer, or a wire member that can be deformed along the shape of the wearer's nose provided at the upper part of the laminated portion. That is, the mask of the present invention is the above-described upper pocket portion, the tape member provided at the upper portion of the laminated portion, which can be deformed along the shape of the wearer's nose, and the wear portion provided at the upper portion of the laminated portion. And at least one selected from the group consisting of wire members that can be deformed along the shape of the person's nose.

The tape member that can be deformed along the shape of the wearer's nose and the wire member that can be deformed along the shape of the wearer's nose are provided on the upper portion of the laminated portion. Since the projections of the nose are largely undulated, and the nasal head is likely to be strongly tensioned, a gap is likely to occur at the base of the nose. These suppress such a gap.
The tape member that can be deformed along the shape of the wearer's nose and the wire member that can be deformed along the shape of the wearer's nose are not particularly limited. For example, for a nose fit used in a conventional mask. A tape member or a wire member can be used. Specifically, metal tapes, such as aluminum, and a synthetic resin rod are mentioned, for example.

FIG. 6 is a schematic view showing another example of the mask of the present invention. 6A is a plan view seen from the inside, FIG. 6B is a vertical end view taken along line VIB-VIB in FIG. 6A, and FIG. 6C is FIG. It is a horizontal end view along the VIC-VIC line in A).
The mask 102 shown in FIG. 6 is basically the same as the mask 100 shown in FIG. 1 except that a wire member 70 is provided in the upper portion of the stacked portion 20 instead of the upper pocket portion 50. And the point which has the side pocket part 60 in the right-and-left both sides of the laminated part 20 differs.
The wire member 70 can be deformed along the shape of the wearer's nose. By deforming the wire member 70 along the shape of the wearer's nose when the mask 102 is worn, it is possible to suppress the generation of a gap near the nose.
The side pocket portions 60 are provided on the left and right sides of the laminated portion 20 and are configured by a sheet member having an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method. The side pocket 60 effectively prevents leakage of exhaled air from both the left and right sides. In the present invention, it is one of preferred embodiments that the main body portion has side pocket portions.

FIG. 7 is a schematic view showing still another example of the mask of the present invention. 7A is a plan view seen from the inside, FIG. 7B is a vertical end view taken along line VIIB-VIIB in FIG. 7A, and FIG. 7C is FIG. It is a horizontal end view along the VIIC-VIIC line in A).
The mask 104 shown in FIG. 7 is basically the same as the mask 100 shown in FIG. 1 except that the main body portion 14 is molded into a three-dimensional shape. Specifically, in the main body portion 14, the laminated portion 20f is convex outward at the center portion, and the space S1 formed by the lower pocket portion 40f and the space S2 formed by the upper pocket portion 50f are the lower jaw and the wearer, respectively. The shape makes it easier to accommodate the nose.
In general, the body part of a mask molded into a three-dimensional shape has a considerable rigidity to maintain its shape, and only the peripheral part of the body part comes into contact with the face of the wearer. Clearance is likely to occur in the surface, and leakage is likely to occur.
In the mask 104 shown in FIG. 7, the space S1 formed by the lower pocket portion 40f and the space S2 formed by the upper pocket portion 50f are shaped to easily accommodate the wearer's lower jaw and nose, respectively. There is little influence of the gap.

FIG. 8 is a schematic view showing still another example of the mask of the present invention. 8A is a plan view viewed from the inside, FIG. 8B is a vertical end view taken along line VIIIB-VIIIB in FIG. 8A, and FIG. 8C is FIG. It is a lateral end view along the VIIIC-VIIIC line in A).
The mask 106 shown in FIG. 8 is basically the same as the mask 100 shown in FIG. 1 except that the lower pocket 40g and the upper pocket 50g provided in the laminated portion 20g of the main body 16 are fixed to the left and right. The portion 90h is different from the portion 90h in that it is formed of a sheet member having low stretchability and one continuous breathability.
Such a structure is provided with slits or notches for ears on the left and right sides of the stretchable material constituting the fixing portion 90h, and further provided with slits or notches near the central portion, so that the laminated portion of the main body portion 16 is provided. It can be obtained by bonding at 20 g and its periphery. The elastic material used is a sheet member having an air permeability of 2 cm ³ / (cm ² · s) or less by the Frazier method, and therefore, as described later, at least one surface, preferably both surfaces of the elastomer film are laminated with a nonwoven fabric. One preferred embodiment is to use the unidirectionally stretched composite elastic body.
Among these, it is one of preferred embodiments to use a unidirectionally stretchable composite elastic body in which both surfaces of an elastomer film (for example, a synthetic rubber film) are laminated and bonded with a nonwoven fabric formed into a bowl shape. In this aspect, there is little fear that the wearer's skin will be worn even when worn for a long time. In addition, since the space functioning as an “air reservoir” is formed over the entire periphery of the mask main body, the flow rate of the exhaled exhaled air can be efficiently relieved and the exhaled air can be moved to the entire stacking unit. .
In the mask 106 shown in FIG. 8, the lower pocket portion 40g, the upper pocket portion 50g, and the fixing portion 90h are configured by a single elastic sheet member, but the present invention is not limited to this, for example, It is also possible to form the ear hook part by forming this with two sheets on the upper and lower sides and combining it at the left and right ends of the fixed part.

The fixing portion 90 is coupled to the main body portion 10 and fixes the main body portion 10 to the lower part of the wearer's face.
The fixing portion 90 is made of a loop-like stretchable material that is hung on the wearer's ear. The stretchable material is not particularly limited, and examples thereof include a woven band of rubber yarn and cotton, a knitted net of urethane filament and polyester filament, Uly nylon knitted in a tube shape, and a stretchable nonwoven fabric.
Among them, the one in which the present inventor proposed in JP-A-6-328600 and JP-A-7-252762 is preferably provided with a slit or a notch in a unidirectionally stretched composite elastic body, It is more preferable that slits or notches are provided in a unidirectionally stretchable composite elastic body having both surfaces laminated with a nonwoven fabric. In this case, the main body can be stably fixed at the time of wearing, and traces are hardly left on the wearer's skin.

FIG. 9 is a schematic plan view of another example of the mask of the present invention having various fixing portions as viewed from the inside.
The mask 100a shown in FIG. 9A includes a fixing portion 90a that is coupled to the main body portion 12a and fixes the main body portion 12a to the lower part of the wearer's face. The fixing portion 90a is configured by a loop-shaped rubber string that is hung on the wearer's ear.
A mask 100b shown in FIG. 9B includes a fixing portion 90b that is coupled to the main body portion 12b and fixes the main body portion 12b to the lower part of the wearer's face. The fixing portion 90b is made of a loop-like stretchable material that is obtained by providing a cutout 92 in a stretchable nonwoven fabric and is hung on the wearer's ear.
A mask 100c shown in FIG. 9C includes a fixing portion 90c that is coupled to the main body portion 12c and fixes the main body portion 12c to the lower part of the wearer's face. The fixing portion 90c is made of a loop-like stretchable material that is obtained by providing a slit 94 in a stretchable nonwoven fabric and is hung on the wearer's ear.

In the present invention, the fixing portion is not limited to the loop-shaped stretchable material. For example, two strings that are provided on both the left and right sides of the main body, and can be hooked to the wearer's ears by tying each other, such as the vine portion of the glasses, from above the wearer's ear Examples include a structure to be hung, a loop-shaped headband hung on the wearer's head similar to that used for an eyepatch, and an adhesive that is brought into close contact with the cheek of the wearer.
FIG. 10 is a schematic plan view of another example of the mask of the present invention having various fixing portions as viewed from the inside.
The mask 100d shown in FIG. 10A includes a fixing portion 90d that is coupled to the main body portion 12d and fixes the main body portion 12d to the lower part of the wearer's face. The fixing part 90d is provided on each of the left and right sides of the main body part 12d, and is composed of two strings that can be hooked to the wearer's ears by being tied together.
A mask 100e shown in FIG. 10B includes a fixing portion 90e that is coupled to the main body portion 12e and fixes the main body portion 12e to the lower part of the wearer's face. The fixing portion 90e is configured by a structure that is hung on the wearer's ear from above.
FIG. 11 is a schematic diagram showing another example of the mask of the present invention having various fixing portions. FIG. 11A is a perspective view seen from the outside, and FIG. 11B is a plan view seen from the inside.
A mask 100f shown in FIG. 11A includes a fixing portion 90f that is coupled to the main body portion 12f and fixes the main body portion 12f to the lower part of the wearer's face. The fixing portion 90f is configured by a loop-shaped headband that is hung on the wearer's head.
A mask 100g shown in FIG. 11B includes a fixing portion 90g that is coupled to the main body portion 12g and fixes the main body portion 12g to the lower part of the wearer's face. The fixing portion 90g is made of an adhesive material that is brought into close contact with the wearer's cheek or the like. In the mask 100g, since the space formed by the lower pocket portion 42 of the main body portion 12g accommodates the entire lower jaw of the wearer, the mask 100g is not easily displaced, and can be stably fixed even when the area of the adhesive material used is reduced. can do.

In conventional masks, fixing to the face is performed only by the so-called “ear hooks”. As it passes, it becomes painful and marks on the ear hooks remain. Furthermore, when worn for a long time, fog may occur. For this reason, various devices have been made, such as using a wide nonwoven fabric as the material for the ear hook, or providing an adhesive on the main body and fixing it to the face.
In the mask of the present invention, since the tip of the lower jaw of the wearer can be accommodated in the space formed by the lower pocket portion and the laminated portion of the main body, the main body is not easily displaced and a gap is also generated. Since it is difficult, there is an advantage that it is not necessary to strongly fix the fixing portion.

  The mask 100 of the present invention can be obtained by integrating the various members described above. The integration method is not particularly limited, and examples thereof include stitching with a sewing thread or the like; adhesion by hot melt or the like; welding by heat sealing, ultrasonic sealing, or the like. In the case of stitching with a perforated thread, the perforation can be sealed with a resin, an adhesive tape, or the like.

The mask of the present invention is preferably disposable after being used by wrapping it in tissue or putting it in a bag made of PE or the like, but it uses an appropriate sterilization treatment such as relatively high thermal stability. It can also be used repeatedly by performing steam sterilization. The number of repeated uses is preferably 2 to 3 times.
For example, as described above, when the main body portion further has a detachable replacement sheet member on the wearer side of the inner surface sheet of the laminated portion, the laminated portion remains as it is, for example, every time the mask is removed. Only the replacement sheet can be exchanged. In this case, there is no problem in repeated use 2 to 3 times.
If you do not have a replacement sheet, or even if you have a replacement sheet, if the main body is visibly soiled or there is a risk of pathogen contamination after prolonged use, for example, detergent Do not use, wash the dirt on the surface of the body while holding the fixed part and shaking lightly in the water while pouring water into the bat. It can be reused with peace of mind by wrapping it lightly and putting it in a domestic steamer for about 20 minutes.

As mentioned above, although the mask of this invention was demonstrated based on each embodiment of illustration, this invention is not limited to these, For example, the structure of each part is arbitrary structures which can exhibit the same function, and Can be replaced.
Moreover, it can also be set as another embodiment by combining arbitrarily the structure of each part in each embodiment.

  The mask of the present invention is suitably used for various applications. Especially, it uses suitably as a mask for preventing that a pathogen is discharge | released outside from a wearer.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. For example, in the following examples, only the inactivation sheet using MFC was used, but refer to the descriptions in Japanese Patent Laid-Open Nos. 7-138858 and 7-265297 proposed by the present inventors. Then, an inactivated sheet using an antibacterial synthetic fiber may be used.

1. Production of inactivated sheet containing MFC and zeolite supporting Cu ions (1) Preparation of MFC LBKP (St. Croix, manufactured by Bonster) according to the conditions described in International Publication No. 2004/009902 pamphlet As a raw material, DDR was passed through 60 cycles to obtain a 3.5 mass% aqueous dispersion of MFC. The properties were as follows.

(A) Number average fiber length A very small amount of aqueous dispersion was collected using a spatula, and ion-exchanged water was added to obtain an aqueous dispersion of about 0.03% by mass. This aqueous dispersion was collected in a 500 mL beaker and used as a measurement sample.
The number average fiber length was measured using a JAPAN TAPPI paper pulp test method No. 52 “Pulp and paper—Fiber length test method—Optical automatic measurement method”.
The number average fiber length was determined by dividing the numerical value obtained by integrating the lengths of all the cellulose fibers present in the measurement sample by the number.
As a result of the measurement, the number average fiber length was 0.15 mm.

(B) Amount of water retained The amount of water retained is a value representing the volume of water that can be retained by the unit mass of MFC, and was specifically determined as follows.
That is, the amount of water held is measured by weighing 50 mL of an aqueous dispersion of MFC having a temperature of 20 ° C. and a concentration of 1.5 mass% into a test tube (inner diameter: 30 mm × length: 100 mm, scale display volume: 50 mL). After centrifuging at (3,300 rpm) for 10 minutes, the volume of the deposit was read and determined by the following formula (1). The absolute dry mass of MFC was obtained by weighing the deposit when it reached a constant weight state by heat drying.
As a result of the measurement, the water holding amount was 30 mL / g.

  Amount of water retained (mL / g) = volume of sediment (mL) / absolute dry mass of MFC (g) (1)

(C) 0.50 mass% aqueous dispersion viscosity About 60 mL of aqueous dispersion was sampled, and ion-exchanged water was added to obtain a 0.50 mass% aqueous dispersion. 500 mL of this aqueous dispersion was collected in a 500 mL beaker, adjusted to 20 ° C., and used as a measurement sample.
The viscosity of the measurement sample was measured using a Brookfield rotary viscometer, which is a single cylindrical rotary viscometer defined in JIS Z8803 “Viscosity Measuring Method”. The measurement is No. This was carried out using 2 rotors, rotated at 12 rpm, and the value 30 seconds after the start of rotation was taken as the viscosity (mPa · s). The viscosity was measured 5 times, and the average value was obtained.
As a result of the measurement, the viscosity of the 0.50 mass% aqueous dispersion was 320 mPa · s.

(2) Preparation of mixed slurry containing MFC and zeolite supporting Cu ions The 3.5 mass% aqueous dispersion of MFC obtained above was diluted with ethanol (primary reagent, manufactured by Wako Pure Chemical Industries, Ltd.). Zeolite supporting Cu ions (Bactekiller, manufactured by Fuji Chemical Co., Ltd., powder) was added and stirred to prepare a mixed slurry having the following composition. The obtained mixed slurry was not phase-separated even after being left for about 3 hours, and the zeolite supporting Cu ions was uniformly dispersed without becoming mako.

・ MFC: 0.9% by mass
・ Zeolite supporting Cu ions: 0.5% by mass
・ Ethanol / water = 70/30 (mass ratio)

(3) Application of mixed slurry to base material Using a hand coating apparatus, ethanol and water on a base material SMMS nonwoven fabric (Avgol, 15.0 g / m ² , weight per unit made of PP) After pre-coating with a mixed solvent (ethanol / water = 70/30 (mass ratio)), the mixed slurry obtained above was applied. The coated SMMS nonwoven fabric was placed on a mat on which filter papers were stacked to absorb excess solvent, and then air-dried at room temperature to obtain an inactivated sheet.
The obtained inactivated sheet had a smooth surface, no powder detachment, and a good coating state.
The structure of the obtained inactivation sheet was as follows.

SMMS nonwoven fabric: 15.0 g / m ²
MFC: 4.1 g / m ²
・ Zeolite supporting Cu ions: 2.3 g / m ²
・ Total weight: 21.4 g / m ²

(4) Antibacterial test of inactivated sheet When the obtained inactivated sheet was subjected to an antibacterial test using a normal agar culture method, it was confirmed that the inactivated sheet exhibited strong antibacterial properties.

(5) Measurement of folding effect The obtained inactivated sheet was folded into various shapes, and the air permeability was measured by the fragile method. Here, the air permeability by the fragile method was calculated based on the area in the folded state.
The results are shown in Table 2. In Table 2, the “shape” column shows a typical end face shape of the inactivated sheet, and the “folding rate” column divides the area before folding by the area in the folded state. Indicates the calculated value.

From Table 2, as the folding rate increases, the air permeability increases almost proportionally.
However, in the case of the pleated shape, the air permeation resistance is increased in the overlapped portion, and the effect due to the increase in the surface area is hardly exhibited, and the air permeability is not so high. Therefore, it can be seen that the air permeability is greatly improved by using the crepe tissue as an interleaf to create a gap in the pleats to secure an air passage.

2. 2. Production of deactivation sheet containing MFC and zeolite supporting Ag ions (1) Preparation of mixed slurry containing MFC and zeolite supporting Ag ions 3. MFC obtained by the same method as above A 5% by mass aqueous dispersion is diluted with ethanol (primary reagent, manufactured by Wako Pure Chemical Industries, Ltd.), added with zeolite carrying Ag ions (Zeomic, manufactured by Sinanen Zeomic Co., Ltd., powdered), and stirred to obtain the following composition. A mixed slurry was prepared. The obtained mixed slurry was not phase-separated even after being allowed to stand for about 3 hours, and the zeolite carrying Ag ions was uniformly dispersed without becoming mako.

・ MFC: 0.8% by mass
・ Zeolite supporting Ag ions: 1.0% by mass
・ Ethanol / water = 70/30 (mass ratio)

(2) Application of mixed slurry to base material Using a hand coating device, ethanol is applied on the base material rayon spunbond (TCF # 403, manufactured by Phutamura Chemical Co., Ltd., basis weight 30.0 g / m ² ). After pre-coating with a mixed solvent of ethanol and water (ethanol / water = 70/30 (mass ratio)), the mixed slurry obtained above was applied. The coated rayon spunbond was placed on a mat on which filter paper was stacked to absorb excess solvent, and then air-dried at room temperature to obtain an inactivated sheet.
The obtained inactivated sheet was uniform with little roughness on the surface, and no powder detachment occurred.
The structure of the obtained inactivation sheet was as follows.

・ Rayon spunbond: 30.0 g / m ²
MFC: 3.6 g / m ²
・ Zeolite supporting Ag ions: 4.5 g / m ²
・ Total weight: 38.1 g / m ²

(3) Antiviral properties of the inactivated sheet The obtained inactivated sheet was commissioned to the Kitasato Environmental Science Center, and a virus inactivation test was performed using H1N1 influenza virus.
As a result, the infectious titer after 24 hours with respect to the initial infectious titer showed a sharp decrease of 5.2 Log ₁₀ or more, confirming that the virus was greatly reduced and inactivated. Prior to carrying out the virus inactivation test, the inactivation sheet was subjected to an antibacterial test using a normal agar culture method, and it was confirmed that it exhibited strong antibacterial properties.

3. Production of an inactivated sheet having a surface containing MFC and a zeolite supporting Ag ions and a surface containing chitosan (1) Application of chitosan-containing emulsion to substrate Using hand coating device, a timber cotton spunlaced (cotton Ace, manufactured by Unitika Ltd., basis weight 50.0 g / m ²⁾ onto the chitosan-containing emulsion chitosan coating amount was applied so that the 1.2 g / m ^2. The coated cotton spunlace was air dried at room temperature.

(2) Application of mixed slurry to base material Using hand coating device, cotton spunlace chitosan-containing emulsion (UF-55F, manufactured by Takamatsu Yushi Co., Ltd., 7% by mass aqueous solution) opposite side After pre-coating with a mixed solvent of ethanol and water (ethanol / water = 70/30 (mass ratio)) on the surface of the above, a zeolite carrying MFC and Ag ions obtained by the same method as above was used. A mixed slurry containing was applied. The coated rayon spunbond was placed on a mat on which filter paper was stacked to absorb excess solvent, and then air-dried at room temperature to obtain an inactivated sheet.
The obtained inactivated sheet had a smooth surface, no powder detachment, and a good coating state.
The structure of the obtained inactivation sheet was as follows.

・ Cotton spunlace: 50.0 g / m ²
・ Chitosan: 1.2 g / m ²
MFC: 3.2 g / m ²
・ Zeolite supporting Ag ions: 4.0 g / m ²
・ Total weight: 58.4 g / m ²

4). Production of mask (Example 1)
A non-woven sheet made of PE (DELNET, manufactured by Sansho Co., Ltd., weight per unit area 20 g / m ² ) serving as an inner sheet and an inactivated sheet containing MFC obtained above and zeolite carrying Ag ions has a folding ratio of 1. The inactivated sheet containing the MFC obtained above and the MFC obtained above and zeolite supporting Cu ions is creped so that the folding ratio is 1.8 times. The processed one and the SMMS nonwoven fabric (Avgor, weight 13 g / m ² , made of PP) to be the outer sheet were laminated in this order. About the said 2 inactivation sheet | seat, the uncoated surface was arrange | positioned inside. The four sides were integrated with a sewing machine to obtain a laminate having a four-layer structure.

A multilayer of a breathable film (manufactured by Tokuyama, weight per unit: 17 g / m ² ) and PE / PET spunbond (Elves, manufactured by Unitika, weight per unit: 15 g / m ² ) on the lower and upper parts of the laminate obtained above. Using a sheet member (air permeability 1 cm ³ / (cm ² · s) or less by the Frazier method, 450 s / 100 cm ³ by the Gurley method) obtained by bonding the product to a depth of 40 mm, A pocket was provided.
Then, four polyurethane filaments (Lycra, DuPont, 800d), which are elastic materials, were arranged in parallel at the edges of the lower pocket portion and the upper pocket portion so as to have a width of 8 mm.
Furthermore, what provided the slit in the unidirectionally extensible composite elastic body which laminated | stacked both surfaces of the 50-micrometer-thick SEBS film (made by Clayton) with PE / PET spunbond was provided in the right-and-left both ends of the laminated body. In this way, a fixing portion made of a loop-like stretchable material to be worn on the wearer's ear was provided, and the mask shown in FIG. 1 (however, the laminate was a four-layer structure) was obtained.

(Example 2)
Inert having an apertured film made of PE to be an inner surface sheet (made by Toledo, 25 g / m ² per unit area), a surface containing MFC obtained above and zeolite supporting Ag ions, and a surface containing chitosan An inactivated sheet containing an activated sheet (not folded) and the above-obtained MFC and a zeolite carrying Cu ions, processed into a crepe shape with a folding ratio of 1.8 times; The SMMS non-woven fabric (Avgol, weight 13 g / m ² , PP), which becomes the outer sheet, was laminated in this order. About the inactivation sheet | seat which has the surface containing the said chitosan, the chitosan coating surface was arrange | positioned toward the inner side. The four sides were integrated with a sewing machine to obtain a laminate having a four-layer structure.
Using the laminate obtained above, the mask shown in FIG. 1 (however, the laminate was a four-layer structure) was obtained in the same manner as in Example 1.

5. Estimation of Antiviral Properties of Masks Obtained in Examples As described above, the antibacterial properties and antiviral properties of the inactivated sheet, which is a constituent member of the mask of the present invention, were measured by a specialized institution. As for the inactivation evaluation of the virus as a mask, the current evaluation method has not been established, and there are also measurement specialized institutions that evaluate N-95 and N-99, which are dust protection standards. Since there is not, this inventor estimated as follows.
That is, the masks obtained in Examples 1 and 2 are
(1) The main body part is using a deactivation sheet in duplicate, such as a Cu-containing sheet and an Ag ion-containing sheet or chitosan and an Ag ion-containing sheet,
(2) Both expiratory air and inspiratory air are designed so as to transmit mainly through the four layers of the main body and hardly leak (see FIGS. 4 and 5 and their explanations).
(3) The main body is composed of a highly breathable laminated portion and a non-breathable lower pocket and upper pocket, and has a structure that reduces the exhalation leak rate to the limit. Presumed to have antibacterial and antiviral properties.

6). Measurement of air permeability For the masks obtained in Examples 1 and 2, the air permeability of the laminate was measured by the Frazier method. Further, the air permeability of the commercially available mask was measured by the Frazier method near the center of the main body.
As a result, the mask obtained in Example 1 was 35 cm ³ / (cm ² · s), and the mask obtained in Example 2 was 25 cm ³ / (cm ² · s).
On the other hand, Unicharm virus guard mask N-95 is 23 cm ³ / (cm ² · s), Unicharm highly breathable mask is 40 cm ³ / (cm ² · s), manufactured by Daiichi Sankyo The pandemic mask was 26 cm ³ / (cm ² · s), and the Wilgard Viral Mask manufactured by Earth Pharmaceutical Co. was 13 cm ³ / (cm ² · s). The mask manufactured by Earth Pharmaceutical Co., Ltd. having an air permeability of 13 cm ³ / (cm ² · s) felt slightly stuffy when worn for 2 to 3 hours.

7). Evaluation of the state of occurrence of gaps when worn, etc. Various commercially available masks shown in Table 1, the mask of the present invention (obtained in Example 1), and the lower pocket and upper pocket in the mask of the present invention About the thing which incorporated the breathable material into the part, the generation | occurrence | production state of the clearance gap at the time of wear and the grade of the leak from the mask upper part at the time of deep breathing were evaluated. In addition, all the commercially available masks have a wire member that can be deformed along the shape of the wearer's nose.
The test subjects were five adults (two men and three women), and the most common events were described. The degree of leak from the upper part of the mask during deep breathing was evaluated by holding the mirror horizontally under the wearer's eyes and observing the degree of cloudiness of the mirror when the subject repeated deep breathing.
The results are shown in Table 3.

8). Evaluation of wearing feeling The masks obtained in Examples 1 and 2 were worn by five test subjects for evaluation of the state of occurrence of gaps between the wearers and the wearing feeling was evaluated.
As a result, none of the masks produced a gap between the main body and the face, and the main body did not shift even when the mouth was intentionally moved. In addition, none of the masks felt stuffy even after repeated breathing.
The mask of the present invention was developed for the purpose of preventing the spread of viruses to the outside by being worn by virus-infected persons, but it is self-evident that non-infected persons and medical workers can prevent infection. It was also confirmed that there was no problem even if it was worn for use.

10, 10a, 10b, 10c, 10d, 10e, 12, 12a, 12b, 12c, 12d, 12e, 12f, 12g, 14, 16 Main body part 20, 20a, 20b, 20c, 20d, 20e, 20f, 20g Laminating part 30, 30a, 30b, 30c, 30d, 30e Laminate 32, 32a, 32b, 32c, 32d, 32e Inner surface sheet 34, 34a, 34b, 34c, 34d, 34e Active body deactivation layer 36, 36a, 36b, 36c 36d, 36e Outer sheet 38a, 38b, 38c, 38d, 38e Joint 40, 40a, 40b, 40c, 40d, 40e, 40f, 40g, 42 Lower pocket 50, 50a, 50b, 50c, 50d, 50e, 50f 50 g Upper pocket portion 60 Side pocket portion 70 Wire member 90, 90a, 90b, 90c, 90d, 90e, 90f, 90g, 90h Fixed portion 92 Notch 94 Slit 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 102, 104, 106, 160 Mask 130 Glass tube with stopcock 131 Box 132 Petri dish 133 Tube 134, 150 Air pump 135 Glass tube with stopcock 136 Rubber balloon 140 Mask mounting jig 144 Gas supply nozzle 146 Exhaust gas collection funnel 148 Ethanol detector tube S1, S2 Space

Claims (19)

A main body covering the lower part of the face including the wearer's nose and mouth, and a fixing part coupled to the main body and fixing the main body to the lower part of the wearer's face;
The main body is
It has a laminate in which an inner sheet, a pathogen inactivating layer, and an outer sheet are laminated in this order from the wearer side, and the air permeability of the laminate according to the Frazier method is 15 cm ³ / (cm ² · s ) And the laminated part
A sheet member having a permeability of 2 cm ³ / (cm ² · s) or less provided by the Frazier method provided at the lower portion of the laminated portion and forming a space for accommodating the tip of the lower jaw of the wearer. The lower pocket,
An upper pocket portion formed by a sheet member provided at the upper portion of the laminated portion and having an air permeability of 2 cm ³ / (cm ² · s) or less according to the Frazier method and forming a space for accommodating the wearer's nose; A tape member provided at the upper part of the laminated part and deformable along the shape of the wearer's nose, and a wire provided at the upper part of the laminated part and deformable along the shape of the wearer's nose And at least one selected from the group consisting of members.   The mask according to claim 1, wherein an elastic material is provided on at least a part of an edge portion of the lower pocket portion.   The mask according to claim 2, wherein the elastic material provided on at least a part of the edge portion of the lower pocket portion is disposed so as to be positioned below the lower jaw of the wearer when worn. .   The mask in any one of Claims 1-3 with which the elastic material is provided in at least one part of the edge part of the said upper pocket part.   The mask according to claim 1, wherein the pathogen inactivating layer is composed of a plurality of sheet-like materials.   The mask according to claim 5, wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is folded.   At least one of the plurality of sheet-like materials constituting the pathogen inactivating layer has a thickness under no load of 0.5 mm or more and an apparent specific gravity of 0.1 or less. 6. The mask according to 6.   The mask according to any one of claims 5 to 7, wherein at least one of the plurality of sheet-like materials constituting the pathogen-inactivating layer is a nonwoven fabric using synthetic fibers having antiviral performance.   The mask according to any one of claims 5 to 8, wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is a hydrophilic nonwoven fabric using cellulosic fibers.   The mask according to any one of claims 5 to 9, wherein at least one of the plurality of sheet-like materials constituting the pathogen-inactivating layer is a nonwoven fabric using ultrafine cellulose.   The mask according to any one of claims 5 to 10, wherein at least one of the plurality of sheet-like materials constituting the pathogen inactivating layer is a sheet containing an inorganic substance supporting metal ions.   The mask according to claim 11, wherein the sheet containing an inorganic material supporting metal ions is a nonwoven fabric using ultrafine cellulose.   The said metal ion is at least 1 sort (s) chosen from the group which consists of Cu ion, Ag ion, Zn ion, Ti ion, Au ion, Pt ion, Mn ion, Fe ion, and Zr ion. mask of.   The inorganic substance is at least one selected from the group consisting of zeolite, dolomite, apatite, hydroxyapatite, activated carbon, activated alumina, titanium dioxide, shirasu balloon, silica gel, and molecular sieve. mask of.   The fixing portion is made of a loop-like stretchable material that is worn on the wearer's ear, and the stretchable material is slit or cut into a unidirectionally stretchable elastic composite in which both sides of an elastomer film are laminated with a nonwoven fabric. The mask according to claim 1, wherein the mask is provided with a notch.   The mask according to claim 1, wherein the inner sheet is porous.   The mask in any one of Claims 1-16 in which the said inner surface sheet | seat has a bowl-shaped uneven structure on the surface.   The mask according to any one of claims 1 to 17, wherein the main body portion further includes a removable seat member for replacement on the wearer side of the inner surface sheet of the laminated portion.   The mask according to any one of claims 1 to 18, wherein the lower pocket portion, the upper pocket portion, and the fixing portion of the main body portion are formed of a single sheet member.

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