JP6173110B2 - Cup type mask - Google Patents

Description

  The present invention relates to a cup-type mask.

Conventionally, for example, a three-dimensional cup-shaped mask is used for a dust mask, a sanitary mask, a hay fever countermeasure mask, and the like. This is because the inner surface of the mask is not in direct contact with the wearer's nose and mouth and can cover the nose and mouth without causing discomfort to the wearer.
And it is calculated | required that it can wear so that a clearance gap may not arise between a wearer's face and a cup type mask so that a wearer can attract | suck dust and a virus.

Therefore, in order to be able to press and hold the cup-shaped mask against the wearer's face, the cup-shaped mask is provided with, for example, a string, a belt, or a tie string such as a linear or belt-shaped rubber member, A cup-shaped mask is worn by putting a sash string on the back and ears of the wearer. It should be noted that the cup-type mask is required to be stronger than the half-fold mask so that the cup-type mask will not be crushed even when pressed against the wearer's face.

As such a cup-type mask, for example, a mask having a shape as disclosed in JP 2012-161475 A (hereinafter referred to as Patent Document 1) has been proposed.
In addition, in order to reinforce a filter part, the mask currently disclosed by patent document 1 discloses providing the vertical groove which protrudes in the direction away from a wearer in the inner surface of a wearer side so that it may become parallel in the left-right direction. doing.

JP 2012-161475 A (Claims, 0023, FIG. 1, etc.)

  However, in order to wear the cup-type mask so that there is no gap between the face of the wearer and the face, if the cup-type mask is strongly pressed against the face of the wearer with the lashes, the lashes on the main face of the cup-type mask Tension acts between them, and a dent may occur unintentionally in the place where the tension acts. As a result, when a gap is formed between the cup-shaped mask and the wearer's face due to the occurrence of a dent, the problem that the wearer sucks dust or virus that has passed through the gap, or a dent has occurred. The problem that the filtration performance of the part deteriorates and the function of the mask is difficult to be exhibited, and when the inner surface of the mask comes into contact with the nose or mouth of the wearer due to the formation of a dent, the wearer feels uncomfortable There was concern about the problem

In particular, the problem that the cup-shaped mask is likely to be depressed unintentionally during or during wearing is more difficult than the cup-shaped mask having a string on the outer periphery of the cup-shaped mask. There was a tendency to occur easily in a cup-type mask provided with a lace at a position close to the center part farthest from the wearer's face.
Further, the problem that the cup-shaped mask is likely to be unintentionally worn when or during wearing is caused by laminating a porous material having air permeability prepared separately and having functionality such as filter performance on the porous substrate. In the cup-type mask provided with the mask main body portion thus formed, there was a tendency to occur easily.

The cup-type mask is superior in strength to the bi-fold mask, but has a property that once a dent is generated, it is difficult to return to the shape before the dent is generated. For this reason, the cup-type mask has a tendency that it is more difficult to eliminate the dent than the bi-fold mask and the dent tends to exist continuously, making it difficult to solve the above-described problems.

An object of the present invention is to provide a cup-type mask that can prevent unintentional dents during or during wearing.

The present invention
"A cup-shaped mask with a porous base material in the shape of a cup-shaped cup and
The braid is provided at both end portions in the left-right direction of the porous substrate,
The porous base material passes through the middle of the lashes on the main surface, and is symmetrical with respect to a straight line perpendicular to the left-right direction so that the middle of the lashes and the left and right lashes Has one or two grooves between each string ,
The groove has a shape having an arched portion,
The arched portion of the groove faces the middle of the laces on the main surface of the porous substrate,
Cup type mask. "
It is.

As a result of continuous studies, the present inventors have found that a cup-type mask having a shimejimo and a cup-shaped porous base material has a groove between squeezes on the main surface of the porous base material. In addition, the cup-shaped mask is pressed against the wearer's face with strong force by the lashes because the arched portion of the groove faces the middle of the lashes on the main surface of the porous substrate. It has been found that even when tension is applied to the mold mask, unintentional dents can be prevented between the laces on the main surface of the cup mask.
Furthermore, the porous base material passes through the middle of the laces on the main surface, and is symmetrical with respect to the straight line perpendicular to the left-right direction, so that the middle of the lashes and the left and right lashes are between each other. It is possible to more effectively prevent unintentional dents between the laces on the main surface of the cup-shaped mask by having one groove or two grooves each on the surface. I found it.

Although this reason is not completely clarified, it is thought that this is because the effects described below are exhibited.
That is, when pressing and holding the cup-shaped mask against the wearer's face with the lashes, the arched portion in the groove exerts a tension acting in the direction from the middle toward the lashes on the main surface of the porous substrate. Since it can support, it is thought that the said tension | tensile_strength can disperse | distribute and it can prevent making a dent unintentionally.

Therefore, the cup-shaped mask of the present invention can prevent the dent from being unintentionally worn or worn.

It is the typical top view which looked at the cup type mask of the present invention from the front. It is typical sectional drawing at the time of cut | disconnecting the cup type mask of this invention with the straight line which makes the left-right direction and passes through the middle. It is the typical top view which illustrated the shape of the slot concerning the present invention. It is the typical top view which illustrated the shape of the slot concerning the present invention. It is typical sectional drawing when another cup type | mold mask of this invention is cut | disconnected by the straight line which is parallel to the left-right direction and passes through the middle. It is a typical top view of the face body which can be used by this invention. 2 is a front view of the porous substrate prepared in Comparative Example 1. FIG. 2 is a front view of the porous substrate prepared in Example 1. FIG. 3 is a front view of the porous substrate prepared in Comparative Example 2. FIG. 5 is a front view of the porous substrate prepared in Comparative Example 3. 2 is a front view of the porous substrate prepared in Example 2. FIG.

FIG. 1 is a schematic plan view of the cup-shaped mask of the present invention as viewed from the front, and the cup-shaped mask of the present invention is cut by a straight line that is parallel to the left-right direction and passes through the middle. 2 will be described with reference to FIG. 2, which is a schematic cross-sectional view.
In FIG. 1-2, a part of the porous substrate is formed by projecting to the wearer's face side in the cup-type mask (the back side on the paper surface in FIG. 1, the bottom side on the paper surface in FIG. 2). Fig. 6 illustrates a cup-type mask with a groove formed therein. Further, in FIG. 2, a cup-shaped mask is shown by omitting a part of the lashes.

The cup-shaped mask (10) of the present invention includes a lace string (1) and a cup-shaped porous substrate (2, hereinafter referred to as a porous substrate). In FIG. 1, a lace (1) is provided on the outer main surface of the porous substrate (2) (on the front main surface on the paper in FIG. 1).
The braid (1) plays a role of pressing and holding the cup-shaped mask (10) against the wearer's face.
The porous substrate (2) mainly retains the cup-shaped three-dimensional shape of the cup-shaped mask (10) and is not intended for the cup-shaped mask (10) when the cup-shaped mask (10) is worn or during wearing. It is a member that plays a role of preventing the formation of a dent. In addition, as the cup type here is shown in FIG. 2, the center part protrudes in the direction away from the wearer's face (upward on the paper surface in FIG. 2) with respect to the outer periphery of the mask. Refers to the shape.

Then, the cup-shaped mask (1) is provided on both end portions of the porous base material (2) in the left-right direction (shown as an arrow line A in FIGS. 1 and 2). 10) is configured.
Here, the left-right direction (A) is the direction in which the wearer wears the cup-shaped mask (10) in the porous base material (2) (B, hereinafter referred to as the up-down direction). It means the direction orthogonal to. In addition, the shimeji (1) is not limited to the aspect provided in the outer periphery of the porous base material (2), but the main body of the porous base material (2) like the aspect illustrated in FIG. Also included is an embodiment in which a lace (1) is provided in the vicinity of the outer periphery on the surface (a position closer to the center side of the porous substrate (2) from the outer periphery of the porous substrate (2)).

  In addition, in FIG. 1-2, a squeeze string is interposed through a holding member (4) which is a part of a squeeze string (1) fixed so as to be in direct contact with the main surface of the porous substrate (2). Although the cup-shaped mask (10) provided with (1) is illustrated, as another embodiment of the cup-shaped mask (10), a porous material having air permeability prepared separately from the porous substrate (2) In the case of a cup-type mask having a laminated body (not shown), a tie string (1) is provided with a holding member (4) fixed so as to be in direct contact with the main surface of the material. Or a cup-shaped mask (not shown).

In the present invention, the laces (1) are provided at both end portions in the left-right direction of the above-described laminate, with a holding member (4) fixed so as to be in direct contact with the main surface of the material. Even in a cup-type mask (not shown), it is defined that the lashes (1) are provided at both end portions in the left-right direction of the porous base material (2).

  In this invention, having a groove | channel (3) between the lacing cords (1) on the main surface of a porous base material (2) means the staking provided in the left end part of the porous base material (2). On the line connecting the string (1) and the sash string (1) provided on the right end, or in the range sandwiched between the lines when a plurality of the line segments can be created, the groove (3) Refers to the existence of.

In addition, in FIG. 1-2, while the groove | channel (3) exists between the laces (1) on the main surface of a porous base material (2), it is in the midpoint of the line segment mentioned above, or between line segments. Axially symmetric with respect to a straight line that passes through the middle (1), which is the center point of the sandwiched range (5), and is parallel to the vertical direction (B). Thus, a porous substrate (2) having a total of four grooves (3), two each between the middle (5) and the left and right lashes (1) is shown.

And the groove | channel (3) is a shape which has an arch-shaped part, and the arch-shaped part of a groove | channel (3) has faced the intermediate | middle (5) on the main surface of a porous base material (2).

That the groove | channel (5) which concerns on this invention is the above-mentioned shape and arrangement | positioning points out that it is an aspect which satisfies the conditions prescribed | regulated below. This aspect will be described with reference to FIG. 3 which is a schematic plan view illustrating the shape of the groove according to the present invention.
1. From the outside of the porous substrate (2) in the direction orthogonal to the main surface of the porous substrate (2), a plan view of the groove (3) can be obtained by taking a photograph of the groove (3) in front. create.
2. A straight line (b) parallel to the vertical direction (B) on the intermediate side in the plan view (on the left side of the paper with respect to the groove (3) in FIG. 3) with respect to the groove (3) shown in the plan view. Create
In addition, when the outline of the groove (3) shown in the photograph is partially unclear and the shape of the groove (3) is unclear, the adjacent outlines are formed by forming a shortest distance in the unclear portion. Then, a shape surrounded by one contour line is created, and the shape is defined as the shape of the groove (3).
3. A line segment (a) forming the shortest distance between the straight line (b) and the groove (3) is created.
4). Each end (t1, t2) in the vertical direction (B) in the groove (3) is selected, and a line segment (c1) forming the shortest distance between the straight line (b) and one end (t1) in the groove (3) ) And a line segment (c2) forming the shortest distance between the straight line (b) and the other end (t2) in the groove (3).

In the line segment (a), the line segment (c1), and the line segment (c2) created as described above, the line segment (a) exists between the line segment (c1) and the line segment (c2). In addition, when the length of the line segment (a) is shorter than the lengths of the line segment (c1) and the line segment (c2), the groove (3 ) Has a shape having an arch-like portion (in other words, a portion projecting in the left-right direction (A) between both ends (t1, t2) in the vertical direction (B) of the groove (3)). And facing toward the middle (5) on the main surface of the porous substrate (2).

The cup-shaped mask (10) provided with the lashes (1) and the porous substrate (2) of the present invention has a groove (1) between the laces (1) on the main surface of the porous substrate (2). 3) and the arched portion of the groove (3) faces the middle (5) between the laces (1) on the main surface of the porous substrate (2). Even when the cup-shaped mask (10) is pressed against the face of the wearer with a strong force by the string (1) and tension is applied to the cup-shaped mask (10), the string (1 ) Unintentional dents can be prevented from occurring between each other.

The shape of the protruding portion may be a curved line, an acute angle or an obtuse angle, and is a groove (3) having a shape capable of creating a plurality of line segments (a) having the same length. May be.
In addition, the portion of the groove (3) that forms the shortest distance with the straight line (b) (hereinafter sometimes referred to as an arch-shaped top portion) is on the line connecting the middle (5) and the string (1). If present, the above-described effects are further effectively exhibited, which is preferable.

The reason why the above effects are exhibited is not completely clarified, but it is considered that the effects described below are exhibited.
That is, when the cup-shaped mask (10) is pressed against the wearer's face by the lashes (1) and held, the folds (1) from the intermediate (5) on the main surface of the porous substrate (2). Since the arch-shaped portion in the groove (3) can support the tension acting in the direction toward the head, it is possible to prevent the tension from being dispersed and causing a dent unintentionally.

Hereinafter, the cup type mask (10) of the present invention will be described in detail.

As long as the porous substrate (2) referred to in the present invention is a member made of a material having air permeability, the constituent material can be appropriately selected and used, and is not limited. The porous substrate (2) is formed by, for example, laminating a plurality of one kind of materials composed of only one material such as a fabric (woven fabric, knitted fabric or nonwoven fabric), a breathable foam or a breathable film. Or by combining and stacking a plurality of materials.

Various characteristics such as basis weight and thickness of the material constituting the porous substrate (2) are not particularly limited, and are preferably adjusted as appropriate. Basis weight is preferably from 1 to 500 g / ^{m 2,} more preferably from 3~400g / ^{m 2,} most preferably a 5~300g / ^{m 2.} The thickness is preferably from 0.01 to 30 mm, more preferably from 0.05 to 20 mm, and most preferably from 0.1 to 10 mm.
In the present invention, “weight per unit area” refers to the mass per 1 m ² area of the main surface, and the main surface refers to a surface having a large area. The “thickness” as used in the present invention is a value measured by a compression elastic thickness gauge. Specifically, when a load of 100 gf is applied to a load area of 5 cm ² with respect to the main surface of the symmetrical object to be measured. Of the thickness of the region.

In order to improve the collection performance of the cup-shaped mask (10) and / or to add functionality to the cup-shaped mask (10), a separately prepared porous material having air permeability (hereinafter referred to as a separately prepared material) May be used) to prepare the porous substrate (2), or a single or a plurality of materials separately prepared for the porous substrate (2) may be selected and laminated.

The method of preparing a porous substrate (2) by laminating a plurality of materials and the method of laminating separately prepared materials on the porous substrate (2) are appropriately selected and are not limited. For example,
1. Without superimposing a plurality of materials or a porous substrate (2) and a separately prepared material,
2. A method of entanglement by providing, for example, a needle punch device or a water entanglement device, a laminate formed by overlapping each material, or a laminate formed by overlapping a porous base material (2) and a separately prepared material,
3. Method of melting and integrating the constituent components of the material by subjecting the laminated material obtained by superimposing each material or the laminated material obtained by superimposing the porous base material (2) and a separately prepared material to a heating means ,
4). A method of bonding and integrating each material and the porous base material (2) with a separately prepared material by interposing an adhesive such as a binder or hot melt resin,
5. Laminated body made by superimposing each material, and the periphery of the laminated body made by laminating a porous base material (2) and a separately prepared material is sewn and bonded, or point seal processing using ultrasonic fusion, etc. Applying, fusing and integrating,
Etc. can be used.

A method of three-dimensionally molding and processing the porous base material (2) prepared as described above, or the porous base material (2) and a separately prepared laminated body into a cup shape can be appropriately selected and limited. Although not a thing, for example, the prepared porous substrate (2) or laminate is pressed against a cup-shaped mask mold or molded, or the mask is a cup-shaped mask sandwiched between a male mold and a female mold. It is possible to adopt a method of molding so that In addition, it can select suitably whether it heats at the time of shaping | molding, or it does not heat.
At this time, a mask mold having irregularities capable of forming a groove (3) having a desired shape on the surface is used so that a groove (3) described later can be formed on the main surface of the porous substrate (2). Is preferred.

In addition, after the porous base material (2) is molded into a cup-shaped shape having the groove (3) according to the present invention by the above-described method, a material separately prepared for the molded porous base material (2) May be laminated. Note that the separately prepared material is on the outer main surface of the porous base material (2) (on the upper main surface on the paper surface in FIG. 2) and / or on the inner main surface (the paper surface in FIG. 2). (On the main surface on the lower side).

Subsequently, the detail of the raw material which can be used by this invention is demonstrated.
The above-mentioned materials include, for example, polyolefin resins (polyethylene, polypropylene, polymethylpentene, polyolefin resins having a structure in which a part of hydrocarbon is substituted with a cyano group or a halogen such as fluorine or chlorine), styrene resins, and polyethers. Resin (polyether ether ketone, polyacetal, phenol resin, melamine resin, urea resin, epoxy resin, modified polyphenylene ether, aromatic polyether ketone, etc.), polyester resin (polyethylene terephthalate, polytrimethylene terephthalate, Polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polycarbonate, polyarylate, wholly aromatic polyester resin, unsaturated polyester resin, etc.), polyimide Fat, polyamideimide resin, polyamide resin (for example, aromatic polyamide resin, aromatic polyetheramide resin, nylon resin, etc.), resin having nitrile group (for example, polyacrylonitrile, etc.), urethane resin, epoxy resin , Polysulfone resin (polysulfone, polyethersulfone, etc.), fluorine resin (polytetrafluoroethylene, polyvinylidene fluoride, etc.), cellulose resin, polybenzimidazole resin, acrylic resin (eg, acrylic ester or methacrylic ester) For example, polyacrylonitrile resins copolymerized with acrylonitrile and modacrylic resins copolymerized with acrylonitrile and vinyl chloride or vinylidene chloride).

These organic polymers may be either linear polymers or branched polymers, and the organic polymer may be a block copolymer or a random copolymer, and the three-dimensional structure or crystal of the organic polymer. The presence or absence of sex is not particularly limited. Furthermore, what mixed the some organic polymer may be sufficient, and it does not specifically limit.

  When the material is a fabric, the fibers constituting the fabric are, for example, a melt spinning method, a dry spinning method, a wet spinning method, a direct spinning method (such as a melt blow method, a spun bond method, an electrostatic spinning method), or a composite fiber. It can be obtained by a known method such as a method of extracting fibers having a small fiber diameter by removing more than one kind of resin components, a method of beating fibers and obtaining divided fibers.

  The fibers constituting the fabric may be composed of one kind or plural kinds of resin components, and are generally called composite fibers, for example, core-sheath type, sea-island type, side-by-side type, orange type, etc. Can be used. In addition, you may use the composite fiber provided with the thermoplastic resin in which one fiber component is a thermoadhesive component, and the latent crimpable composite fiber provided with several resin from which a thermal contraction rate differs.

Although the fiber diameter of the fiber which comprises a fabric is not specifically limited, It is preferable that the said fiber diameter is 0.01 micrometer-1 mm, and it is more preferable that it is 0.1 micrometer-100 micrometers. Moreover, although fiber length is not specifically limited, either short fiber, long fiber, or continuous fiber can be used.

When the fabric is a woven fabric or a knitted fabric, the material can be prepared by weaving or knitting the fibers prepared as described above.

When the said fabric is a nonwoven fabric, a dry method, a wet method, etc. can be used as a preparation method of the fiber web which can manufacture a nonwoven fabric, for example. And as a method of entanglement and / or integration of the fibers constituting the fiber web into a nonwoven fabric, for example, a method of entanglement with a needle or water flow, a method of integrating fibers with a binder, or a fiber web In the case where a thermoplastic resin is contained, there can be mentioned a method in which the fibers are integrated by melting the thermoplastic resin by heat-treating the fiber web.
As a method of heat-treating the fiber web, for example, a method of heating and pressing with a calender roll, a method of heating with a hot air dryer, a method of irradiating infrared rays under no pressure, or the like can be used.
Further, a non-woven fabric may be prepared by using a direct spinning method to reduce the diameter of a spinning solution or melted resin and directly spinning the fiber and collecting the fibers.

When the material is a breathable foam or a breathable film, for example, the material can be prepared by a known method such as casting a molten resin into a mold and performing foaming treatment.

In the case of imparting functionality to the cup-shaped mask (10) of the present invention, the material preferably contains a functional component. The type of the functional component can be appropriately selected depending on the function required for the cup-shaped mask (10), and is not limited. For example, a radioactive material adsorbent (for example, zeolite, activated carbon, bitumen (Prussian blue), etc. ), Antibacterial agents, bactericides, antiviral agents, antifungal agents, catalysts (such as titanium oxide, manganese dioxide or platinum-carrying alumina), humidity control agents (such as silica gel and silica microcapsules), activated carbon and carbon black And the like, and deodorizing agents, pigments, fragrances, cation exchange resins and anion exchange resins.
The functional component may be present in the form of particles on the surface and / or inside of the material, or in the form of a film so as to cover a part or all of the surface of the material (for example, the fiber surface). .

The method for supporting the functional component on the material can be appropriately selected. For example, the functional component dispersion or the functional component dispersion containing the binder is sprayed on one or both main surfaces of the material. Alternatively, after carrying using a known coating method (for example, kiss coating method using gravure roll, die coating method, etc.), after removing the solvent from the material, or after immersing the material in the above dispersion and pulling it up A method of removing the solvent from the material can be employed.

In order to improve the collection performance of the cup-shaped mask (10) of the present invention, the material is preferably charged.
As a means for charging the material, for example, a means for charging by injecting ions such as plasma charging treatment or corona charging, a means for charging by applying a force through a polar liquid, and charging by rubbing plural kinds of fiber components. Well-known means such as means for making them suitable may be selected or used in combination.

When using a means for charging by injecting ions, such as plasma charging or corona charging, or when using a means for charging by applying a force through a polar liquid, the volume resistivity value is 10 ¹⁴ Ω · It is preferable to be composed of an organic polymer of cm or more because a material having a higher charge amount can be obtained.

Examples of organic polymers having a volume resistivity of 10 ¹⁴ Ω · cm or more include, for example, polyolefin resins (for example, polyethylene resins, polypropylene resins, polymethylpentene resins, polystyrene resins, etc.), polytetrafluoroethylene, Examples thereof include polyvinylidene chloride, polyvinyl chloride, and polyurethane. The “volume resistivity” in the present invention refers to a value obtained by measurement according to JIS K 6911 “General Test Method for Thermosetting Plastics”.

  Furthermore, when using a means for charging by applying a force through a polar liquid, the organic polymer constituting the material can be used, for example, a hindered amine compound, an aliphatic metal salt so that the charge amount of the material can be increased. One or two or more compounds selected from (eg, magnesium salt of stearic acid, aluminum salt of stearic acid) and unsaturated carboxylic acid-modified polymer can be added as an additive. Of these series of additives, it is preferable to add a hindered amine compound.

  Specific examples of such hindered amine compounds include, for example, poly [{(6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) {( 2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6-tetramethyl-4-piperidyl) imino}}, dimethyl-1-succinate (2-hydroxy) Ethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine polycondensate, bis (3- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate ( 1,2,2,6,6-pentamethyl-4-piperidyl) and the like.

Although the addition amount of these additives with respect to an organic polymer is not specifically limited, It is desirable to add with the mass of 0.01-5 mass% with respect to the mass of an organic polymer. If the additive amount is less than 0.01% by mass, the charging effect exhibited by the material tends to be small, so it is preferable to make the additive amount 0.05% by mass or more.
Moreover, when the said addition amount exceeds 5 mass%, it exists in the tendency for the intensity | strength of a raw material to be inferior. Therefore, more preferably, the amount added is 4% by mass or less.

In the present invention, the method of charging by applying a force through a polar liquid is a method of charging by applying a force to the material via the polar liquid simultaneously with or after applying the polar liquid to the material. Say.

  As a means for applying the polar liquid to the material, for example, a means for applying the polar liquid in a mist-like, droplet-like, liquid-like manner using a spray, shower, nozzle, etc., for example, an impregnation apparatus (for example, And a means for applying the material by immersing the material in a polar liquid using a Rodney Hunt saturator). The means for applying the polar liquid to the material is not limited as long as a charged material can be obtained, and is preferably selected as appropriate.

As the polar liquid, it is preferable to use a liquid having low electrical conductivity, such as water, alcohol, acetone, an alcohol aqueous solution, an acetone aqueous solution, or an ammonia aqueous solution. The electric conductivity referred to here is one measured by JIS K 0101 “Industrial water test method”. In particular, when water is used as the polar liquid, it is more preferable because it is excellent in the working environment when charging the material, and it is possible to avoid ignition or ignition in the drying treatment described later.
The temperature of the polar liquid used in the liquid charging process is not limited as long as the material can be charged, but it is preferably 40 ° C. or lower.

As a method for applying a force to a material via a polar liquid, for example, a method of applying an ultrasonic wave, a method of applying a vibration, or the like can be used. Further, a force may be applied to the material via the polar liquid by bringing the polar liquid into contact with the material using the above-described means for applying the polar liquid to the material.

Next, it is preferable to subject the raw material to which a force is applied through the polar liquid in this way to a drying process in order to remove the polar liquid.
Examples of the apparatus used for the drying treatment include known apparatuses such as a heating roller such as a can dryer and a calendar, a hot air dryer, a hot air dryer, an electric furnace, and a heat plate. The temperature in the drying treatment is preferably 120 ° C. or lower, more preferably 105 ° C. or lower, and further preferably 90 ° C. or lower.
Alternatively, the material may be naturally dried without using the above-described drying device, or may be subjected to a drying process in which the material is not easily subjected to heat, such as removing polar liquid by applying ultrasonic waves or vibrations.

When using a means for frictionally charging a plurality of types of fiber components, a fabric is obtained by rubbing a fiber composed of a polyolefin resin component having a volume resistivity of 10 ¹⁴ Ω · cm or more and a fiber composed of an acrylic resin component. Charging is preferable because a charged material having a larger charge amount can be obtained.

In order to increase the charge amount of the fabric, it is preferable to use a polyolefin fiber made of a resin obtained by substituting a part of the polyolefin resin with a cyano group or a halogen as the fiber made of the polyolefin resin component. Furthermore, it is preferable to use a polyolefin fiber containing a phosphorus-based antioxidant and / or a sulfur-based antioxidant as the fiber made of a polyolefin-based resin component so that the amount of charge of the fabric can be increased. At this time, it is more preferable that only the polyolefin fiber contains a phosphorus-based antioxidant and / or a sulfur-based antioxidant so as to increase the charge amount of the fabric.

If a large amount of an additive that inhibits the charging effect, such as a fiber oil agent, adheres to the fibers constituting the fabric, the fabric may not be effectively charged and it may be difficult to obtain a charged material with a large amount of charge. There is. Therefore, the fiber is washed with, for example, warm water or alcohol, and the addition ratio of the additive that inhibits the charging effect is 0.2% by mass or less, preferably 0.15% by mass or less with respect to the fiber mass. It is desirable to charge a plurality of types of fiber components by friction.

The means for frictionally charging a plurality of types of fiber components is not limited as long as the fibers can be frictionally charged with each other.
As a means for charging the nonwoven fabric, when using a means for frictionally charging a plurality of types of fiber components, in addition to a card device represented by a flat card or a roller card, using a device belonging to the garnet device or the air array method, It is preferable because the fibers easily rub against each other. Further, in order to increase the strength of the charged material finally obtained and to improve the charge amount, it is preferable that the nonwoven fabric is provided for a needle punch device.

  The grooves (3) are present between the laces (1) on the main surface of the porous substrate (2), and the number thereof is appropriately adjusted and is not limited. In the cup-type mask (10) according to the present invention, the number of grooves (3) may be one or more, but it is possible to provide a cup-type mask (10) having an excellent function capable of preventing unintentional depression. More preferably, there are a plurality of grooves (3). Moreover, when the porous substrate (2) includes a plurality of grooves (3), a plurality of types of grooves having different shapes and sizes even though the porous substrate (2) includes a plurality of grooves (3) having the same shape and size. (3) may be provided. In addition, if the conditions prescribed | regulated by this invention are satisfied, the position which provides a groove | channel (3) can be adjusted suitably, for example, the distance (for example, the space | interval of the center parts of a groove | channel (3), etc.) ) May be uniform or non-uniform and is adjusted as appropriate.

  As shown in FIGS. 1 and 2, the groove (3) is provided so as to be symmetrical with respect to a straight line passing through the middle (5) and parallel to the vertical direction (B). Is preferred. When the groove (3) is provided in such an arrangement, the cup-shaped mask (10) is pressed against the wearer's face by the lacing cord (1) with a strong force to act on the cup-shaped mask (10). Even in this case, it is possible to apply a tension evenly to the groove (3) provided symmetrically with respect to the straight line, and the string (1) on the main surface of the cup-shaped mask (10). ) It is preferable because it is possible to more effectively prevent unintentional dents between each other.

When the groove (3) is provided in the middle (5), when tension is applied to the cup-shaped mask (10), the middle (5) in the porous base material (2) and its surroundings are not intended. There is a risk of dents. Therefore, it is preferable that the groove (3) is not provided in the middle (5).

The shape of the groove (3) may be a shape defined based on the above-described definition, and the shape is appropriately adjusted. The shape of the groove (3) is an abbreviation shown in FIG. 1 or FIG. Besides adopting the mold-shaped groove (3), for example, as shown in FIG. 4 which is a schematic plan view illustrating the shape of the groove according to the present invention, a triangular shape (a-1) , A triangular shape (a-2) lacking an end, a wedge shape (a-3), a wedge shaped shape (a-4) lacking an end, a semicircular shape or a semi-elliptical shape (b-1), A semicircular or semi-elliptical shape (b-2), a crescent shape (b-3), a crescent shape (b-4) lacking an end, or the like can be employed.

The size of the groove (3) is appropriately prepared so as to prevent unintentional dents from being generated and should not be limited. For example, each end of the groove (3) in the vertical direction (B) The shortest distance between the parts can be 1 mm to 200 mm, can be 3 mm to 180 mm, and can be 5 mm to 160 mm.
The length of the groove (3) in the left-right direction (A) on the main surface of the porous substrate (2) can be 1 mm to 200 mm, can be 3 mm to 160 mm, and can be 5 mm to 120 mm. Can do. The depth of the groove (3) can be from 0.1 mm to 80 mm, can be from 0.5 mm to 60 mm, and can be from 1 mm to 40 mm. Note that the length of the groove (3) in the left-right direction (A) can be uniform or non-uniform.

Further, if necessary, another groove different from the groove (3) described above may be provided in a portion other than the middle (5), which is farthest from the wearer's face on the outer main surface of the porous substrate (2). You may have. When the above-described another groove exists at such a position, the porous substrate (2) can be stored or transported by laminating the porous substrate (2) or the cup-shaped mask (10). It is preferable to prevent the occurrence of a problem peculiar to the cup-type mask (10) which does not occur in the bi-fold mask, in which force concentrates on the portion having the height and a dent is unintentionally formed in the portion.

In addition, although the aspect of a groove | channel (3) is adjusted suitably, even if it is a groove | channel (3) in which a part of porous base material (2) protruded and formed on the wearer's face side, a wearer It may be a groove (3) formed by projecting a part of the porous base material (2) on the side away from the face, but part of the porous base material (2) on the face side of the wearer The cup-shaped mask (10) provided with the groove (3) formed by protruding is further preferred because it tends to be able to prevent unintentional dents during wearing or during wearing.

The type and shape of the sash string (1) are not limited as long as they are members that can hold the cup-shaped mask (10) on the wearer's face, and are not limited. It can be a linear or belt-like rubber member. Moreover, in this invention, you may provide a string (1) in a porous base material (2) through a holding member (4) in the meantime. As the holding member (4), for example, a flat plate-shaped member having a notch for hooking the lacing cord (1), a hook-and-loop fastener, a needle core fastened by a stapler, and a lacing cord (1) such as a button, hook or loop are hooked. A sheet-like member such as a protrusion, a film, or a fabric can be used, and can be used alone or in combination.
In addition, when the lacing cord (1) is provided in the porous base material (2) through the holding member (4), the holding member (4) is also regarded as a constituent member of the lacing cord (1). .

Further, the shimeji (1) and the holding member (4) can be configured using the organic polymer described above, and can be configured using metal, wood, or the like.

The method of providing the lacing cord (1) on the porous base material (2) can be appropriately selected and is not limited. For example, a method of bonding with a binder, a method of welding, a method of sewing, a holding member (4) And the like.

In addition, the method of fixing the holding member (4) to the main surface of the porous base material (2) or the main surface of the porous base material (2) and a separately prepared laminate of materials described later is appropriately selected. Although not limited thereto, for example, a method of bonding with a binder, a method of welding, a method of sewing, and the like can be given.

As shown in FIG. 5 which is a schematic cross-sectional view of another cup-type mask of the present invention cut along a straight line parallel to the left-right direction and passing through the middle, the cup-type mask (20) is A facepiece (6) may be provided around the inner main surface (on the main surface on the lower side on the paper surface in FIG. 5).
When the cup-type mask (20) is provided with the face body (6), it is difficult to form a gap between the cup-type mask (20) and the wearer's face, and dust and viruses that have passed through the gap are worn. The problem that a person sucks can be prevented, which is preferable.

In addition, a face body (6) can be prepared using the raw material mentioned above.
Although the shape and size of the facepiece (6) and the position and number of the facepiece (6) in the cup-shaped mask (20) are adjusted as appropriate, they are schematic plan views of the facepiece that can be used in the present invention. As shown in FIG. 6, a face body (6) having a substantially ring-shaped shape having an opening (7) in the central portion is preferable. The face body (6) having such a shape is preferable because the mouth and nose of the wearer can be accommodated in the opening (7) of the face body (6) and the above-described problems can be prevented. .
In particular, if the cup-shaped mask (20) includes a face body (6) prepared using a charged material, dust and viruses can be prevented from passing through the face body (6). In addition, a cup-type mask (20) excellent in dust collection performance can be provided, which is preferable.

The method for joining and integrating the face body (6) to the cup-shaped mask (20) is selected as appropriate. For example, it is bonded and integrated with an adhesive such as a binder or hot melt resin, or fused and integrated. it can. In the case of adopting the fusion-integrating method, the charging performance of the cup-type mask (20) finally obtained by application of heat may be lost, so means that are difficult to be heated such as ultrasonic fusion. Is preferably used.

As another aspect of the cup-type mask (not shown) of the present invention, an exhaust valve that can selectively pass exhaled air moving from the inside air side to the outside air side of the cup-type mask so that exhaust can be performed easily. (Not shown) may be provided.

Hereinafter, specific numerical conditions and the like will be described by way of example in order to facilitate understanding of the present invention. However, the present invention is not limited to these specific conditions, and the design may be changed within the scope of the object of the present invention. And modifications can be made.

(Method for preparing needle punched laminated nonwoven fabric)
A dry web A having a basis weight of 40 g / m ² was prepared by mixing fibers having the following composition and supplying the mixture to a card apparatus.
Polyethylene / polypropylene core-sheath composite fiber (fineness: 6.6 dtex, fiber length: 102 mm): 70% by mass
Polyethylene terephthalate / polyethylene terephthalate copolymer side-by-side composite fiber (fineness: 2.2 dtex, fiber length: 51 mm): 25% by mass
-Ethylene-ethylene vinyl acetate copolymer / polypropylene core-sheath composite fiber (fineness: 3.3 dtex, fiber length: 64 mm): 5% by mass

Next, a dry web B having a basis weight of 40 g / m ² was prepared by mixing fibers having the following composition and supplying the mixture to a card device.
Polyethylene / polypropylene core-sheath type composite fiber (fineness: 20 dtex, fiber length: 102 mm): 30% by mass
Polyethylene / polypropylene core-sheath type composite fiber (fineness: 6.6 dtex, fiber length: 102 mm): 65% by mass
-Ethylene-ethylene vinyl acetate copolymer / polypropylene core-sheath composite fiber (fineness: 3.3 dtex, fiber length: 64 mm): 5% by mass

And the dry web A and the dry web B were laminated | stacked, and the needle punch lamination | stacking nonwoven fabric (base weight: 80g / m < ² >) was prepared by performing a needle punch process from the dry web A side.

(Comparative Example 1)
Two needle punch laminated nonwoven fabrics prepared in the item “Preparation method of needle punch laminated nonwoven fabric” were laminated to prepare a laminate. And the laminated body was put into the oven adjusted so that heating temperature might be 180 degreeC, and the heat processing was performed for 30 second.
Thereafter, the heat-treated laminate was press-molded for 10 seconds using a mask mold having a smooth surface, thereby preparing a cup-shaped porous substrate having no grooves.

The photograph which image | photographed the porous base material prepared as mentioned above from the front was illustrated in FIG.

Finally, as in the embodiment illustrated in FIG. 1, a flat plate-like member having a notch for hanging a string is integrated by ultrasonic welding at a position close to the center side from the outer periphery of the porous substrate, A cup-type mask provided with laces was prepared by hooking and fixing a string to the cut.

Example 1
Except that a groove was formed by projecting a part of the porous base material on the wearer's face side using a mask mold having irregularities capable of forming a groove on the surface, as in Comparative Example 1. A porous substrate in the shape of a cup having grooves was prepared.
The photograph which image | photographed the porous base material prepared as mentioned above from the front was illustrated in FIG.
Finally, a cup-type mask was prepared in the same manner as in Comparative Example 1 except that a porous base material having a cup shape having grooves was prepared as described above.

In addition, the aspect of the groove | channel provided in the porous base material was as follows.
・ Groove shape: substantially square shape (arch-shaped part faces the middle)
・ Groove size: 50 mm vertically and 10 mm horizontally
-Groove depth: 4mm
・ Total number of grooves: 4 ・ Arrangement of grooves: The middle and each lacing cord (a flat plate with a string attached) are arranged symmetrically with respect to a straight line passing through the middle and parallel to the vertical direction (B). Two members are arranged between each member, and no groove is provided in the middle.
An arch-shaped top portion in the groove exists on a line segment connecting the middle and each lacing cord (a flat plate member with a string).
-The distance between the center portions of the grooves in the groove provided between the middle and each lacing cord (a flat plate member with a string): 12 mm

(Comparative Example 2)
Using another mask molding die provided with unevenness on the surface capable of forming a groove different from the shape of the groove formed in Example 1, a part of the porous base material protrudes on the wearer's face side to form the groove. A porous substrate having a cup-shaped shape having grooves was prepared in the same manner as in Comparative Example 1 except that it was formed.
The photograph which image | photographed the porous base material prepared as mentioned above from the front was illustrated in FIG.
Finally, a cup-type mask was prepared in the same manner as in Comparative Example 1 except that a porous base material having a cup shape having grooves was prepared as described above.

In addition, the aspect of the groove | channel provided in the porous base material was as follows.
・ Groove shape: linear shape (vertical direction (B) on the main surface of the porous substrate and the long side direction of the groove are parallel and have no arched portion)
・ Groove size: 50 mm vertically and 10 mm horizontally
-Groove depth: 4mm
・ Total number of grooves: 4 ・ Arrangement of grooves: The middle and each lacing cord (a flat plate with a string attached) are arranged symmetrically with respect to a straight line passing through the middle and parallel to the vertical direction (B). There are two grooves between each member, and no groove is provided in the middle. The central part of the groove in the groove provided between the middle and each lacing (a flat plate member with a string) Distance between each other: 15mm

(Comparative Example 3)
A part of the porous substrate is protruded on the face side of the wearer using another mask molding die provided with irregularities on the surface capable of forming grooves different from the shapes of the grooves formed in Example 1 and Comparative Example 2. A porous substrate having a cup-shaped shape having a groove was prepared in the same manner as in Comparative Example 1 except that the groove was formed.
The photograph which image | photographed the porous base material prepared as mentioned above from the front was illustrated in FIG.
Finally, a cup-type mask was prepared in the same manner as in Comparative Example 1 except that a porous base material having a cup shape having grooves was prepared as described above.

In addition, the aspect of the groove | channel provided in the porous base material was as follows.
Groove shape: linear shape (the left-right direction (A) on the main surface of the porous substrate and the long-side direction of the groove are parallel and have no arched portion)
・ Groove size: 15 mm vertically and 70 mm horizontally
-Groove depth: 3 mm
・ Total number of grooves: 3 There is one groove each between them. ・ Distance between the central parts of the grooves: 17 mm

(Example 2)
Two needle punch laminated nonwoven fabrics prepared in the item “Preparation method of needle punch laminated nonwoven fabric” were laminated to prepare a laminate. And the laminated body was put into the oven adjusted so that heating temperature might be 180 degreeC, and heat processing was performed for 1 minute.

Thereafter, a part of the porous substrate is formed on the face side of the wearer using a mask mold having unevenness on the surface that can form grooves different from the groove shapes formed in Example 1 and Comparative Example 2-3. A porous substrate having a cup-shaped shape having a groove was prepared by forming a groove by projecting and subjecting the heat-treated laminate to press molding treatment for 10 seconds.

The photograph which image | photographed the porous base material prepared as mentioned above from the front was illustrated in FIG.
Finally, a cup-type mask was prepared in the same manner as in Comparative Example 1 except that a porous base material having a cup shape having grooves was prepared as described above.

In addition, the aspect of the groove | channel provided in the porous base material was as follows.
・ Groove shape: substantially square shape (arch-shaped part faces the middle)
・ Groove size: 60 mm vertically and 10 mm horizontally
-Groove depth: 4mm
・ Total number of grooves: 4 ・ Arrangement of grooves: The middle and each lacing cord (a flat plate with a string attached) are arranged symmetrically with respect to a straight line passing through the middle and parallel to the vertical direction (B). There are no grooves in the middle between the two members, and there is no groove in the middle. The arch-shaped top portion of the groove connects the middle and each lace (a flat plate member with a string). Exists on the minute.
-The distance between the center portions of the grooves in the groove provided between the middle and each lacing cord (a flat plate member with a string): 15 mm

Moreover, the porous base material of Example 2 is the groove | channel mentioned above in parts other than the middle (near the upper edge part of a mask) most distant from the wearer's face on the outer main surface of a porous base material. It had one different groove.
Another embodiment of the groove was as follows.
・ Groove shape: Linear shape (left and right direction (A) on the main surface of the porous substrate and the long side direction of the groove are parallel)
・ Groove size: 12mm vertically and 35mm horizontally
-Groove depth: 3 mm

The cup-type masks of Examples and Comparative Examples obtained as described above were evaluated by being subjected to the following measurement.

(Measurement of cup mask shape change)
In the cup-shaped masks prepared in the examples and comparative examples, a cylinder (diameter: 110 mm, length: 150 mm or more) as a wearer's face in the space surrounded by the inner main surface of the porous substrate and the string. The string was pulled in the direction from the porous substrate toward the cylinder.
And the value of the force which is pulling the string when the dent is generated between the lacing cords (flat plate members hung on the string) on the main surface of the porous substrate is the main value of the porous substrate. On the surface, the evaluation was made by regarding the magnitude of the tension acting in the direction from the middle toward the lacing cord (a flat plate member with a string).
In addition, each shape change measurement was performed 3 times, and the arithmetic average value of each obtained result was regarded as the magnitude (unit: N) of the tension.

  The results measured as described above are summarized in Table 1.

From the above results, it has been found that the cup-type mask of the present invention is a cup-type mask that can prevent unintentional dents when holding the cup-type mask against the wearer's face with a lacing cord. did.

(Example 3)
(Preparation method of melt blown nonwoven fabric subjected to liquid electrification treatment)
Using a commercially available polypropylene resin having a volume resistivity of about 10 ¹⁶ (Ω · cm), a melt blown nonwoven fabric (weight per unit: 50 g / m ² , average fiber diameter: 6 μm) was prepared.
The obtained melt-blown nonwoven fabric is a polar liquid having an electric conductivity of 3.2 (μS / cm) and a temperature maintained in the range of 20 ± 5 ° C. (equivalent to secondary distilled water that has undergone distillation and ion exchange) ) Was held in the bathtub, and pure water was applied thereto, and then an ultrasonic wave having a frequency of 20 kHz was applied. Next, the melt-blown nonwoven fabric subjected to ultrasonic waves was dried at 105 ° C. using a conveyor dryer to prepare a liquid-blown melt-blown nonwoven fabric (weight per unit: 50 g / m ² , average fiber diameter: 6 μm).

(Preparation method of needle punched nonwoven fabric subjected to frictional charging)
A commercially available polypropylene fiber (fineness: 2.2 dtex, fiber length: 51 mm) and an acrylic fiber (fineness: 2.2 dtex, fiber length: 51 mm) having a volume resistivity of about 10 ¹⁶ (Ω · cm), After washing with warm water at 60 ° C. and adjusting the amount of the fiber oil agent adhering to the fibers to be 0.1% or less with respect to the fiber mass, the mixing ratio is (polyolefin fiber: acrylic fiber = 40% by mass). : 60% by mass) and mixed uniformly and dried.
The mixed fiber is made into a dry web C by a card device and triboelectrically charged. After the dry web C is laminated on a polypropylene spunbond nonwoven fabric (weight per unit: 15 g / m ² ), needle punching is performed from the dry web C side. The needle punched nonwoven fabric (weight per unit area: 160 g / m ² ) subjected to frictional charging was prepared.

(Method for preparing spunbond nonwoven fabric)
A polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² was prepared.

(Method for preparing laminated nonwoven fabric)
A laminated nonwoven fabric was prepared by laminating the nonwoven fabrics prepared as described above from the upper layer to the lower layer in the following numerical order.
1. 1. Spunbond nonwoven fabric 2. Liquid blown non-woven melt blown nonwoven fabric Frictionally charged needle punched nonwoven fabric (polypropylene spunbonded nonwoven fabric facing the lower layer)
4). Frictionally charged needle punched nonwoven fabric (polypropylene spunbond nonwoven fabric facing the upper layer)
5. 5. Melt blown nonwoven fabric subjected to liquid electrification treatment Spunbond nonwoven fabric

Then, the laminated nonwoven fabric was ultrasonically melted in a sine curve shape to melt into a substantially semicircular shape having only one convex shape, and each nonwoven fabric layer was fused and integrated at the melted portion.
Next, the straight part of the substantially semicircular laminated nonwoven fabric is developed from left to right so that the fusion line formed by fusion fusion of the laminated nonwoven fabric is at the center, and from the upper layer to the lower layer, the spunbond nonwoven fabric-liquid A cup-shaped shape in which a total of three non-woven fabrics are laminated, in which the melt-blown non-woven fabric is charged and the needle punched non-woven fabric is tribo-charged (the polypropylene spunbond non-woven fabric faces the lower layer). A laminated nonwoven fabric was prepared.

(Method for preparing a corona-charged facial body)
A dry web D having a basis weight of 10 g / m ² was prepared by subjecting a polyethylene / polypropylene core-sheath composite fiber (fineness: 3.3 dtex, fiber length: 64 mm) to a card device.
Next, 20% by mass of polyethylene / polypropylene core-sheath composite fiber (fineness: 3.3 dtex, fiber length: 64 mm) and 80% by mass of polypropylene fiber (fineness: 2.2 dtex, fiber length: 51 mm) are mixed to obtain a card device. The dry web E having a basis weight of 40 g / m ² was prepared.
The dry web D and the dry web E prepared in this manner are laminated and subjected to hydroentanglement treatment so that the fibers are intertwined with each other, and then dried to obtain a hydroentangled nonwoven fabric (weight per unit: 50 g / m). ² ) was prepared.

Then, after laminating two hydroentangled non-woven fabrics prepared as described above, and performing corona discharge treatment (15 kv), it is punched out so as to have a substantially ring-shaped shape shown in FIG. And a corona-charged face-piece having a shortest distance of 10 mm.

(Cup type mask preparation method)
The front side of the porous substrate prepared in Example 1 (the outer main surface side of the porous substrate) has a cup-shaped shape prepared in the item “Preparation method of laminated nonwoven fabric having a cup-shaped shape”. After laminating the laminated nonwoven fabric, the entire outer periphery of the corona-charged face body prepared in the section “Method for preparing corona-charged face body” and the porous substrate prepared as described above And a laminated nonwoven fabric, the entire outer periphery on the porous substrate side was brought into contact with each other, and the entire outer periphery of each member was integrated with each other by ultrasonic fusion to prepare a mask main body having a face.
Finally, as in the embodiment illustrated in FIG. 1, a flat plate-like member having a notch for hanging a string is integrated by ultrasonic welding at a position close to the center side from the outer periphery of the porous substrate, A cup-type mask provided with laces was prepared by hooking and fixing a string to the cut.

Example 4
A mask main body having a face body was prepared in the same manner as in Example 3 except that the porous base material prepared in Example 2 was used, and a cup-type mask having a lace was prepared.

The cup-type mask prepared in Example 3-4 was provided with the configuration according to the present invention, and was found to be a cup-type mask that can prevent unintentional dents during wearing or during wearing.

The cup-shaped mask of the present invention prevents unintentional dents between the lashes in the cup-shaped mask even when the cup-shaped mask is pressed against the wearer's face with a strong lace. it can.

DESCRIPTION OF SYMBOLS 10, 20 ... Cup type mask 1 ... Shime string 2 ... Porous base material 3 ... Groove 4 ... Holding member (constituting member)
5 ... Intermediate 6 between the laces on the main surface of the porous substrate ... Face contact body 7 ... Face contact opening t1, t2 ... Vertical ends c1, c2 of the groove ... Line (a) forming the shortest distance between the straight line (b) and the vertical end of the groove (a) Line segment (b) forming the shortest distance between the line (b) and the groove ... Parallel with the vertical direction Straight line A ... left-right direction B ... up-down direction

Claims (1)

A cup-shaped mask having a porous base material in the shape of a cup-shaped cup with shimeji,
The braid is provided at both end portions in the left-right direction of the porous substrate,
The porous base material passes through the middle of the lashes on the main surface, and is symmetrical with respect to a straight line perpendicular to the left-right direction so that the middle of the lashes and the left and right lashes Has one or two grooves between each string ,
The groove has a shape having an arched portion,
The arched portion of the groove faces the middle of the laces on the main surface of the porous substrate,
Cup type mask.

Images