WO2021261534A1 - Mask - Google Patents

Abstract

Provided is a mask through which it is easy to breathe despite enhancing the capacity of a facepiece to inhibit the passage of airborne particles.　The facepiece 100 has an outside layer 110, an intermediate layer 120, an inside layer 130, and an outside layer-adjacent section 140 joined to the upper edge 112 of the outside layer 110. The inside layer 130 and the outside layer-adjacent section 140 are both formed from a three-dimensional fabric. The inside layer 130 and the outside layer-adjacent section 140 partially overlap, and a flow path for air is formed between the two components formed from the three-dimensional fabric. In this way, the ease of breathing is not compromised because the flow path for air via the outside layer-adjacent section 140 and the inside layer 130 is maintained despite using a mask in which the capacity of the outer layer 110 and the intermediate layer 120 and especially the intermediate layer 120 to inhibit the passage of airborne particles is high, in other words, a mask in which the capacity to capture airborne particles and block the passage thereof is high.

Description

mask

The present invention relates to a mask used for medical use, hygiene use, dustproof use, etc.

Patent Document 1 discloses a filter material for a mask manufactured by a double Russell knitted fabric as a three-dimensional fiber structure. This mask filter material has a predetermined number or more of connecting threads made of hygroscopic fibers having an official moisture content of 6% or more and a predetermined weight% or more, and is hydrophobic with an official moisture content of 2% or less on the contact surface with the skin. It is a structure using sex fibers. Further, Patent Document 2 discloses a technique using a three-dimensional three-dimensional knit in an apparatus for collecting a human biological signal. When the 3D knitted fabric and muscles are balanced and biological signals such as heartbeat, respiration, and rocking of the aorta and aorta are propagated, the 3D three-dimensional knitted fabric causes vibration similar to that of human muscles, and the biological signal. Can be propagated without significant attenuation.

Japanese Patent No. 4799739 Japanese Patent No. 5679541

In Patent Document 1, since the mask filter material is made of double Russell knitted fabric, it has excellent breathability, it is easy to breathe, and the function of hygroscopic fibers keeps humidity and suppresses thirst, and is further hydrophobic. It claims the advantage that sex fibers can suppress the stickiness of the skin.

However, in order to increase the collection rate of air particles including pollen, mold, dust, fine particles such as bacteria and viruses, and droplets associated with coughing and sneezing, the gap formed in the double Russell knitted fabric must be made smaller. However, it is necessary to make the density of yarns and fibers of the ground knitted fabric, the density of connecting yarns, and the like more dense. As a result, the more the collection efficiency of particles in the air is increased, the lower the air permeability of the double Russell knitted fabric, and even the double Russell knitted fabric, which is inherently excellent in air permeability, is easy to breathe. Affects. On the other hand, as disclosed in Patent Document 2, when a three-dimensional three-dimensional knitted fabric having characteristics similar to the spring characteristics of a human muscle is used, the three-dimensional three-dimensional knitted fabric vibrates in the same manner as a human muscle due to a biological signal. It has the feature that the biological signal can be efficiently propagated without any discomfort.

The present invention has been made in view of the above, and it is an object of the present invention to provide a mask that is easy to breathe even if the function of suppressing the passage of particles in the air by a facet is enhanced, and further, a feeling of strangeness at the time of wearing is caused. An object is to provide a mask that can be suppressed.

In order to solve the above problems, the mask of the present invention is used.
A mask having a facet and a string member for supporting the facet to the head.
The facet is
It has an outer layer, an intermediate layer and an inner layer, and has an outer layer adjacent portion joined to at least a part of the peripheral portion of the outer layer.
The outer layer and the intermediate layer have a size capable of covering at least the mouth, and the inner layer has a size partially overlapped with the portion adjacent to the outer layer.
At least one of the outer layer and the intermediate layer has a function of suppressing the passage of particles in the air.
Both the inner layer and the outer layer adjacent portion are formed from a three-dimensional fabric, and an air flow path is formed between the inner layer and the outer layer adjacent portion.

The portion adjacent to the outer layer is joined to the upper edge portion of the outer layer.
The inner layer extends above the range of the outer layer and has a size extending to the range of the outer layer adjacent portion, and the upper edge portion is joined to the outer layer adjacent portion, and the lower edge portion is said. It is preferably bonded to the outer layer.

It is preferable that the inner layer has a displacement suppressing portion for reducing friction due to displacement during mounting.
The displacement suppressing portion is configured to have an upper bulging portion provided on the upper side of a range substantially corresponding to the mouth when mounted and a lower bulging portion provided on the lower side of a range substantially corresponding to the mouth when mounted. It is preferable to be done.
It is preferable that the upper bulging portion and the lower bulging portion are formed between sewing lines sewn in a substantially horizontal direction at intervals of upper and lower sides, respectively.
The string member is provided along the range in which the upper bulge and the lower bulge are provided, and by supporting the string member on the head, the upper bulge and the lower bulge are provided. It is preferable that the structure is such that the degree of closeness to the face is increased.

In the inner layer, on at least one of the upper side and the lower side of the range substantially corresponding to the mouth when worn, high-density lines having a relatively higher density of fibers or threads than the other parts are formed substantially in the vertical direction. It is preferable that one or more places are formed along the line.
It is preferable that the high-density line is formed by sewing.

It is preferable that an air flow portion penetrating in the thickness direction is formed at a portion of the intermediate layer corresponding to the high-density line.
It is preferable that a visor portion that protrudes in the nose direction and can cover the tip of the nose is provided in the portion adjacent to the outer layer.
The string member is composed of one, passes through the lower part of the face piece and the visor portion along the width direction thereof, is redirected on the outside in the width direction of one, and both ends are tied on the outside in the width direction of the other. It is preferably supported by the head.
The intermediate layer is formed by using a material having a higher rigidity than the outer layer, maintains a shape in which the substantially central portion in the width direction of the face piece protrudes forward, and creates a space portion between the intermediate layer and the wearer's mouth. It is preferable that it is formed.
It is preferable that the intermediate layer is formed of a material having a higher function of suppressing the passage of particles in the air than the outer layer, and the outer layer is formed of a fabric having a higher air permeability than the intermediate layer.
It is preferable that the three-dimensional fabric is a three-dimensional three-dimensional knitted fabric having a ground knitted fabric on the front and back sides and a connecting thread connecting the ground knitted fabrics on the front and back sides.

The inner layer has a spring characteristic of 50 mm / min using a pressure plate having a diameter of 98 mm in both the left-right direction and the up-down direction in the practical range as a spring characteristic obtained by the relationship between the displacement amount and the tensile strength in the tensile strength test. It is preferable that the value is close to the spring constant of the human muscle obtained when the pressure is increased to 100 N.
The intermediate layer has a spring characteristic obtained in relation to the displacement amount and the tensile strength in the tensile strength test, in which the horizontal spring constant in the practical range is lower than the vertical spring constant, and the horizontal spring in the practical range. It is preferable that the characteristic is a value close to the spring constant of a human muscle obtained when a pressure plate having a diameter of 98 mm is used to pressurize to 100 N at 50 mm / min.
It is preferable that the intermediate layer and the inner layer both have a lower spring constant and a higher tensile strength in the horizontal direction than in the vertical direction.

Further, the mask of the present invention is
A mask having a facet and a string member for supporting the facet to the head.
The facet is
It is composed of an outer layer, an intermediate layer and an inner layer.
The outer layer is made of a breathable material
The intermediate layer is formed of a material having a higher function of suppressing the passage of particles in the air than the outer layer.
The inner layer is formed from a three-dimensional fabric and is
The material constituting the intermediate layer has a rigidity for maintaining a shape in which a substantially central portion in the width direction protrudes forward, and a space portion is formed between the face piece and the wearer's mouth. ..

It is preferable that the intermediate layer is provided with an air flow portion penetrating in the thickness direction, and a three-dimensional fabric constituting the inner layer is inserted into the air flow portion.
In the intermediate layer, a substantially triangular notch extending upward from the lower edge portion is formed at a substantially central portion in the width direction, and this notch constitutes the air flow portion and the lower edge of the notch. It is preferable that the portions are joined to the inner layer so as to be close to each other in the width direction, and the apex portion of the notch protrudes forward.
It is preferable that the outer layer is provided with a visor portion that protrudes in the nose direction and can cover the tip of the nose.
The string member is composed of one, passes through the lower part of the face piece and the visor portion along the width direction thereof, is redirected on the outside in the width direction of one, and both ends are tied on the outside in the width direction of the other. It is preferably supported by the head.

In the mask of the present invention, the facet has an outer layer, an intermediate layer and an inner layer, the inner layer is formed of a three-dimensional fabric, and the outer layer or the intermediate layer is formed of a breathable material. Therefore, as an outer layer or an intermediate layer, preferably an intermediate layer, a material having a high function of suppressing the passage of air particles, that is, a material having a high function of collecting or blocking the passage of air particles is used. Even if it is, the three-dimensional cloth forming the inner layer has excellent air flowability, so that it has a high function of preventing the passage of particles in the air, but it is also easy to breathe. In particular, by using an outer layer or an intermediate layer having a high function of suppressing the passage of particles in the air, preferably an intermediate layer having a predetermined rigidity, a shape in which the substantially central portion in the width direction protrudes forward is maintained. This facilitates the formation of a space between the face and the mouth where sufficient air is always present, so that smoother breathing can be realized.
Further, the face piece has an outer layer, an intermediate layer and an inner layer, and also has an outer layer adjacent portion joined to at least a part of the outer layer, and the inner layer and the outer layer adjacent portion are both formed from the three-dimensional fabric. It is preferable that the configuration is as follows. The inner layer and the adjacent portion of the outer layer partially overlap each other, and an air flow path is formed between the two formed from the three-dimensional fabric. As a result, the outer layer and the intermediate layer, particularly those having a high function of suppressing the passage of air particles as an intermediate layer, that is, those having a high function of collecting or blocking the passage of air particles are used. Even if there is, since the air flow is ensured through the outer layer adjacent portion and the inner layer, the ease of breathing is not impaired.

Further, it is preferable that the inner layer formed of the three-dimensional fabric is provided with a displacement suppressing portion for reducing friction due to displacement during mounting. The displacement suppressing portion can be configured by providing an upper bulging portion and a lower bulging portion on the upper side and the lower side of the range corresponding to the mouth when worn, whereby the degree of closeness to the face at the time of wearing is increased. It will increase. Displacement with the skin of the face is suppressed, and irritation and damage to the skin are reduced. On the other hand, since the inner layer is made of a highly breathable three-dimensional fabric, stuffiness is suppressed even if the degree of close contact is high. By suppressing the stuffiness, the moisture evaporates rapidly when the mask is removed, and the disturbance of the moisturizing function such as the progress of drying is suppressed. Therefore, it is suitable as a mask to be used in hot and humid seasons such as summer.
In addition, by providing a string member corresponding to the upper bulge and the lower bulge, when the string member is hooked on the ear or wrapped around the head to be supported by the head, it is applied to the face. Can be more closely related.
Further, it is preferable that the spring constant obtained by the relationship between the displacement amount and the tensile strength in the inner layer is close to the spring constant of the human muscle in the tensile strength test, and the spring constant obtained in the same way for the intermediate layer. However, it is preferable that the value is close to the spring constant of a human muscle. As a result, the feeling of strangeness when touching the wearer's face is suppressed.

FIG. 1 is a front view showing a mask according to an embodiment of the present invention. FIG. 2 is a rear view of the mask shown in FIG. FIG. 3 is a plan view of the mask shown in FIG. FIG. 4 is a bottom view of the mask shown in FIG. FIG. 5 is a right side view of the mask shown in FIG. FIG. 6 is a left side view of the mask shown in FIG. 7 (a) is a diagram schematically showing a cross section along the line AA of FIG. 2, and FIG. 7 (b) is a diagram schematically showing a cross section along the line BB of FIG. It is a figure shown. FIG. 8 is an exploded view of the mask shown in FIG. 9 (a) is a perspective view showing an embodiment in which an intermediate layer base member and a laminated member are combined as an intermediate layer, and FIG. 9 (b) is a sectional view taken along line CC of FIG. 9 (a). Is. 10 (a) to 10 (c) are diagrams for explaining a test method and measurement results of a tensile strength test in a test example. FIG. 11 shows the test No. It is a graph which showed the measurement result of the tensile strength test of A, C, E, G. FIG. 12 shows the test No. It is a graph which showed the measurement result of the tensile strength test of B, F, N, O, P. FIG. 13 shows the test No. It is a graph which showed the measurement result of the tensile strength test of C. FIG. 14 shows the test No. It is a graph which showed the measurement result of the tensile strength test of D. FIG. 15 is a front view showing a mask according to another embodiment of the present invention. FIG. 16 is a rear view of the mask shown in FIG. FIG. 17 is a partially cutaway perspective view of the mask shown in FIG. 18 (a) is a front view of the intermediate layer, and FIG. 18 (b) is a front view showing a state in which the lower edges of the notches formed in the intermediate layer are brought close to each other, and FIG. 18 (c) is a front view. ) Is a cross-sectional view in a substantially central portion in the width direction in a state where the lower edges of the notches formed in the intermediate layer are close to each other.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. 1 to 8 are views showing a mask 1 according to an embodiment of the present invention. The mask 1 includes a face piece 100 and a string member 200.

The face piece 100 has an outer layer 110, an intermediate layer 120, and an inner layer 130, and also has an outer layer adjacent portion 140 joined to at least a part of the peripheral portion of the outer layer 110. The outer layer 110 and the intermediate layer 120 have a size capable of covering at least a range including the mouth. Preferably, it has a size capable of covering the area including the mouth and nostrils. The size is not limited as long as it can cover the area including the mouth, preferably the area including the nostrils in addition to the mouth, but the lower edge can cover the tip of the chin and the upper edge can cover the tip of the nostril. It is preferable that the amount is about the same. Of course, the standard sizes for adult men, adult women, children, etc. may differ.

The material of the outer layer 110 is not limited, and it can be formed from a synthetic resin film, a thin plate, or the like, but a cloth containing a woven fabric, a knitted fabric, a non-woven fabric, or the like and having a soft feel is preferable. Further, the outer layer 110 can be formed by one sheet, but as in the present embodiment, two sheets of materials 110a and 110a are used to sew the edges toward the center thereof. It may be good (see Fig. 1).

As shown in FIGS. 7 and 8, the intermediate layer 120 is arranged inside the outer layer 110 (on the face side of the wearer). The intermediate layer 120 has an intermediate layer base member 121, and it is preferable that the intermediate layer base member 121 is made of a material having a higher rigidity than the outer layer 110. Part of the side edge portions 111, 111 of the outer layer 110 is folded inward and sewn, and the side edge portions 121a, 121a of the intermediate layer base member 121 are inserted into the folded pieces 111a, 111a. , Retained in the outer layer 110. By arranging the intermediate layer base member 121 in this way and laminating it on the outer layer 110, even if the outer layer 110 is made of a soft material as described above, tension is given and the shape of the outer layer 110 is maintained. Fulfill the function of

The intermediate layer 120 may be composed of only the intermediate layer base member 121, but as shown in FIGS. 9 (a) and 9 (b), the intermediate layer base member 121 is further composed of other members (hereinafter, hereinafter, A configuration in which one or a plurality of "laminated members") 122 are laminated may also be used. The materials constituting the intermediate layer base member 121 and the laminated member 122 are not limited, and like the outer layer 110, include a synthetic resin film, sheet or thin plate, or a woven fabric, knitted fabric, non-woven fabric, or the like. It can be made of cloth or the like.

Further, in the present embodiment, the intermediate layer 120 including the intermediate layer base member 121 is provided so as to be removable rather than being fixed to the outer layer 110. Therefore, only the intermediate layer 120 can be replaced with a new one or washed, which is effective in maintaining a feeling of cleanliness. Further, the type of the intermediate layer 120 (the type of the intermediate layer base member 121 and the laminated member 122 laminated on the intermediate layer base member 121 (material, degree of ventilation, etc.)) can be used, for example, for general use, hospitals, nursing care facilities, factory work, and the like. The mask 100 of the present embodiment can be applied to various uses.

At least one of the outer layer 110 and the intermediate layer 120 has a function of suppressing the passage of particles in the air. In the present specification, "air particles" include solid and liquid fine particles such as pollen, mold, and dust, as well as bacteria and viruses, and droplets released from humans due to coughing and sneezing. The outer layer 110 may be made of a woven fabric such as cotton having breathability with an emphasis on a soft feel and a design of appearance, and the intermediate layer 120 may be mainly provided with a function of suppressing the passage of particles in the air. can.

It is preferable that the intermediate layer 120 has a structure having a high function of suppressing the passage of particles in the air. When the intermediate layer 120 is composed of only the intermediate layer base member 121, for example, a cloth having a high fiber density such as a cloth constituting the intermediate layer base member 121 is used to provide a function of collecting air particles. Can be enhanced. Further, when the intermediate layer 120 has a high rigidity but is, for example, a coarse mesh, a non-woven fabric having a fine mesh and a high function of collecting air particles is used as the laminated member 122. be able to. Further, since the intermediate layer base member 121 has higher rigidity than the outer layer 110, if the peripheral edge portion of the intermediate layer base member 121 is subjected to the fray prevention treatment by sewing means, the rigidity at the peripheral edge portion may become too high. be. Therefore, it is preferable to prevent the peripheral portion from fraying by welding the fibers or threads together by heat treatment. As the intermediate layer base member 121, for example, a two-dimensional fabric having a thickness of 1 mm, manufactured by Asahi Kasei Corporation, product number: Y27013NP can be used.

Further, in the present specification, the "function of suppressing the passage of air particles" includes, of course, the function of capturing air particles between the fibers constituting the outer layer 110 and the intermediate layer 120 as described above. However, as the outer layer 110 and the intermediate layer 120, for example, a synthetic resin film, sheet, or thin plate is used, and the function of blocking the passage of particles in the air is also included. In the present embodiment, as described later, since the inner layer 130 and the outer layer adjacent portion 140 provide an air flow path, air flows from the outer layer 110 and the intermediate layer 120 at positions facing the mouth and the front of the nostrils. Even if it is not taken in, it does not interfere with breathing. Therefore, for example, by using a synthetic resin film or sheet as the laminated member 122 and attaching it to the intermediate layer base member 121, even extremely fine particles such as viruses that are difficult to capture can be used for the mouth and the mouth. It is possible to enhance the effect of suppressing invasion from the front direction of the nostril and suppressing scattering in the front direction due to coughing or sneezing. Further, when the intermediate layer 120 is formed by laminating a laminated member 122 made of a film or a sheet on the intermediate layer base member 121, the intermediate layer 120 is not fixed to the outer layer 110 by sewing or the like, so that air due to breathing or the like is released. The flow causes back and forth movement and vibration. As a result, the intermediate layer 120 acts like a fan and further promotes the flow of air in the inner layer 130. Such films and sheets are not limited, but due to the epidemic of the new virus, it is assumed that they are frequently used outdoors regardless of the season. Those having excellent mechanical properties and the like and capable of maintaining flexibility in a wide temperature range are preferable. For example, a polyurethane elastomer sheet manufactured by Seadam Co., Ltd. (product number: DUS605-CDR, etc.) can be used. The main physical characteristics of DUS605-CDR are as follows.
・ Thickness (mm): 0.5
・ Hardness (JIS A): 96A
・ Tensile strength (MPa): 50
・ Tensile elongation (%): 450
・ 100% modulus (MPa): 11.5
・ 300% modulus (MPa): 24.0
・ Tear strength (KN / m): 140
・ Wear loss (mg): 25
・ Glass transition point (℃): 21
・ Relative density: 1.13
・ Repulsive elasticity (%): 30

Here, the outer layer adjacent portion 140 is joined to at least a part of the peripheral portion of the outer layer 110, preferably to the upper edge portion 112 as in the present embodiment. Specifically, the outer layer adjacent portion 140 has substantially the same width as the outer layer 110, and the lower edge portion 143 of the outer layer adjacent portion 140 is integrated with the upper edge portion 112 of the outer layer 110 by sewing. (See FIGS. 1 and 8). Further, the outer layer adjacent portion 140 has a size in which the upper edge portion 142 extends from the tip of the nose to the middle part of the nasal bridge when worn. The outer layer adjacent portion 140 is formed of a three-dimensional fabric having breathability. The three-dimensional fabric is a three-dimensionally formed woven fabric, knitted fabric, non-woven fabric, or the like, and any of them can be applied. Since the three-dimensional fabric has a three-dimensional structure, it has a predetermined thickness as compared with a normal two-dimensional flat fabric. Due to this thickness, a predetermined distance is always secured from the outer surface of the three-dimensional fabric to the face, and air can flow through the range of the thickness.

As the three-dimensional fabric, it is preferable to use a three-dimensional three-dimensional knitted fabric because it is lightweight, has high durability, and has excellent cushioning properties even if it is thin. The three-dimensional three-dimensional knitted fabric is formed by using a double Russell knitting machine or the like, and has a ground knitted fabric on the front and back sides and a connecting thread connecting the ground knitted fabrics on the front and back sides. The ground knitted fabric is made of, for example, synthetic fibers such as polypropylene, polyester, polyamide, polyacrylonitrile, rayon, recycled fibers, natural fibers such as wool, silk, cotton, etc. It is knitted so that it becomes a mesh. As the connecting thread, for example, a monofilament having an appropriate thickness can be used. It is also possible to form the yarn constituting the ground knitted fabric with a monofilament, or to use a twisted yarn as a connecting yarn.

The inner layer 130 is provided further inside (the face side of the wearer) than the intermediate layer 120. The inner layer 130 has a size that partially overlaps the outer layer adjacent portion 140. Specifically, the upper edge portion 132 of the inner layer 130 is joined to the upper edge portion 142 of the outer layer adjacent portion 140, and the lower edge portion 133 of the inner layer 130 is joined to the lower edge portion 113 of the outer layer 110. (See FIGS. 7 (b) and 8). Therefore, from the upper edge portion 142 to the portion corresponding to the upper edge portion 112 of the outer layer 110, the overlapping range 134 with the outer layer adjacent portion 140 becomes the overlapping range 134 (see FIG. 7B). It is preferable that both the upper edge portion 142 and the lower edge portion 143 are joined by sewing.

The inner layer 130 is formed from the above-mentioned three-dimensional fabric like the outer layer adjacent portion 140, and is preferably formed from a three-dimensional three-dimensional knit. However, when the three-dimensional fabric constituting the inner layer 130 is composed of, for example, a three-dimensional three-dimensional knitted fabric, a material having a soft touch to the skin should be used as the ground knitted fabric constituting the inner surface in contact with the wearer's skin. Is preferable. As such a three-dimensional three-dimensional fabric, for example, Asahi Kasei Corporation, product number: AKE69337 can be used. In addition, considering the weight, usability, fit to the skin, etc., if it is too thick, it becomes heavy and the feeling of foreign matter becomes large, which impairs the usability. Therefore, the thickness is preferably about 1 to 5 mm. It is more preferably about 1.5 to 4 mm. It is preferable to use the same three-dimensional three-dimensional knit for the outer layer adjacent portion 140 so as to obtain a soft feel.

The inner layer 130 has an overlapping range 134 with the outer layer adjacent portion 140 near the upper edge portion 132, and both are formed of a breathable three-dimensional fabric. Therefore, an air flow path is formed between the inner layer 130 and the outer layer adjacent portion 140. As a result, the inflow and outflow of air accompanying the breathing of the wearer is mainly performed through the inner layer 130 and the outer layer adjacent portion 140 forming the air flow path. Therefore, the front of the mouth and nostrils is covered with the outer layer 110 and the intermediate layer 120, and the wearer can easily breathe no matter how high the function of suppressing the passage of air particles in at least the intermediate layer 120 is. be able to. The inner layer 130 and the outer layer adjacent portion 140 can be provided with a function of suppressing the passage of particles in the air by adjusting the material and density of the fibers or threads constituting them. However, it goes without saying that the material, density, etc. are selected so as to have sufficient air circulation to ensure the natural respiration of a person.

The inner layer 130 is made of a three-dimensional fabric having a predetermined thickness (three-dimensional three-dimensional knitted fabric in the present embodiment) as described above, but has a displacement suppressing portion for reducing friction due to displacement during mounting. It is preferable to do. In the present embodiment, as the displacement suppressing portion, an upper bulging portion 135 and a lower bulging portion 136 that bulge in the thickness direction are provided on the upper side and the lower side of the range substantially corresponding to the mouth when mounted. The upper bulging portion 135 increases the degree of closeness to the range from the vicinity of the upper lip to the vicinity of the nasal column, and the lower bulging portion 136 increases the degree of closeness to the range from the vicinity of the lower lip to the vicinity of the chin. As a result, the droplets due to coughing or sneezing can be diffused to the outside through the gap between the side edges 131, 131, the upper edge 132 and the lower edge 133 of the inner layer 130, and the mouth of the particles in the air from the outside. It is possible to further enhance the effect of suppressing the invasion into the body through the sneeze and the nose. By contacting the upper bulge 135 and the lower bulge 136 near the bottom of the nose and near the chin, the contact area of the inner layer 130 is increased as compared with the case where they are not provided, and the contact area with the skin surface of the face is increased. It is less likely to slip between, resulting in reduced friction. When friction due to rubbing between the two acts, the stratum corneum on the surface of the skin is damaged and becomes sensitive, and it is also susceptible to ultraviolet damage when the mask 1 is removed. In addition, the inside of the mask 1 gets stuffy every time it breathes, sebum accumulates in the pores, and germs easily propagate. The greater the stress inside the mask 1, the greater the damage to the skin. Further, if the mask 1 is removed in a stuffy state, the water content evaporates rapidly, the drying progresses, and the moisturizing function is disturbed. However, the mask 1 of the present embodiment uses a three-dimensional fabric having excellent breathability as the inner layer 130, and has an upper bulging portion 135 and a lower bulging portion 136 as a displacement suppressing portion. .. Further, as described later, the string member 200 is provided corresponding to the upper bulging portion 135 and the lower bulging portion 136, and is relatively between the cheek and the inner layer 130 where rubbing and stuffiness are likely to occur. The air permeability is high. Therefore, the mask 1 of the present embodiment has features that it has a high degree of adhesion to the skin surface and is less likely to be rubbed, but has high air permeability and is less likely to get stuffy. Therefore, it is suitable as a mask to be used in hot and humid seasons such as summer.

In forming the upper bulging portion 135, a range outside the position of the upper edge portion 132 of the inner layer 130 in the material state was folded back, and the folded range was sewn in a substantially horizontal direction with an interval up and down. It is formed between the sewing lines 135a and 135a of the book. Similarly, the lower bulging portion 136 is also folded in a range outside the position of the lower edge portion 133 of the inner layer 130 in the material state, and the folded range is sewn in a substantially horizontal direction with an interval up and down. It is formed between the sewing lines 136a and 136a of the book.

Further, in the present embodiment, as shown in FIGS. 2 and 7A, the side edge portions 131, 131 of the inner layer 130 are also outward from the side edge portions 131, 131 in the material state. The range is folded back and a range slightly inward from the side edges 131 and 131 is sewn to form sewing lines 137a and 137a, and side edge bulges 137 and 137 are formed near the side edges 131 and 131. ing. As a result, the closeness of the side edge bulging portions 137 and 137 to the cheeks is enhanced, and the invasion and diffusion of air particles through the gap between the side edge portions 131 and 131 and the face can be suppressed.

As described above, in the present embodiment, the upper bulging portion 135, the lower bulging portion 136, and the side edge bulging portions 137, 137 are all formed by sewing. The sewing thread forming the sewing lines 135a, 136a, 137a increases the density of the ground knitted fabric and the connecting thread at the portion along the sewing lines 135a, 136a, 137a, and enhances the function of suppressing the invasion and diffusion of particles in the air. At the same time, elasticity occurs in the denser part, and the fit to the face is improved. It is also possible to form the upper bulging portion 135, the lower bulging portion 136, and the side edge bulging portions 137, 137 by welding the portions along the sewing lines 135a, 136a, 137a instead of sewing. However, in that case, unlike the sewing lines 135a, 136a, and 137a, it is preferable to use a sewing means because the air flow may be blocked at the welded portion and the air permeability may be hindered.

Further, in the inner layer 130, on at least one of the upper side and the lower side of the range substantially corresponding to the mouth at the time of mounting, a high density line in which the density of the fiber or the thread is relatively higher than that of the other parts is substantially formed. It is preferable that one or more locations are formed along the vertical direction. In the present embodiment, as shown in FIGS. 2 and 7 (a), first, as a thing formed on the upper side of the range substantially corresponding to the mouth, in the overlapping range 134 with the outer layer adjacent portion 140, at the time of mounting. Two high- density lines 138a and 138b extending substantially in the vertical direction are formed at sites substantially corresponding to both sides of the nose. Further, as to be formed on the lower side of the range substantially corresponding to the mouth, a high-density line 138c extending substantially in the vertical direction is formed in the portion substantially corresponding to the central portion of the jaw at the time of wearing in the lower bulging portion 136. Has been done.

The high- density lines 138a, 138b, and 138c are formed by gathering the ground knitted fabric and the connecting yarn of the three-dimensional three-dimensional knitted fabric at the site slightly in the plane direction and sewing them together. As a result, the density of the fibers and yarns forming the ground knitted fabric and the connecting yarn becomes high in the portion, and the rigidity also becomes high. The high- density lines 138a, 138b, and 138c function as barriers that prevent the passage of particles in the air. Further, by gathering and sewing the ground knitted fabric and the like in this way, elasticity is generated, and the portion immediately beside the high- density lines 138a, 138b, 138c is raised, the cushioning property is enhanced, and the cushioning property is enhanced. Increased closeness. Therefore, the high- density lines 138a, 138b, and 138c can be formed by welding, but are preferably formed by sewing.

When the high- density lines 138a, 138b, 138c are formed, the air permeability in the vicinity of the portion along the high- density lines 138a, 138b, 138c decreases. Since the high- density lines 138a, 138b, and 138c are provided on both sides of the nose and near the chin as described above, the higher the air particle collecting function or blocking function of the intermediate layer 120, the more breathing occurs. It can be difficult to do. Therefore, it is preferable to provide notches 123a, 123b, 123c that serve as air flow paths at the positions corresponding to the positions where the high- density lines 138a, 138c, and 138c are formed in the intermediate layer 120 (see FIGS. 8 and 9). ..

It is preferable that the outer layer adjacent portion 140 is provided with a visor portion 150 having a size that protrudes in the nose direction and can cover at least the tip of the nose. The visor portion 150 is formed, for example, by using the same material as the outer layer 110, that is, because it abuts on the nose, a relatively soft material is used to suppress a gap generated between the visor portion 150 and the nose. , Invasion of air particles through the gap and diffusion from the wearer side are suppressed.

As described above, the upper bulging portion 135 and the lower bulging portion 136 are sewn at predetermined intervals by folding back a range outside the positions where the upper edge portion 132 and the lower edge portion 133 are formed in the material state. Therefore, both are formed in the shape of a cylinder with openings at both ends. Therefore, in the present embodiment, the string member 200 is passed through the inside of the upper bulging portion 135 and the lower bulging portion 136 formed in the cylindrical shape. The string member 200 is composed of one and passes from one opening 135b of the upper bulge 135 to the other opening 135c, and further passes from the other opening 136c of the lower bulge 136 to one opening 136b. The ends 201 and 202 are connected to each other (see FIGS. 2 and 8). The portion 203 protruding from one of the openings 135b and 136b and the portion 204 protruding from the other openings 135c and 136c are used over the ears, respectively. In the present embodiment, since the string member 200 is passed through the upper bulging portion 135 and the lower bulging portion 136 formed in this way and hung on the ear, the upper bulging portion 135 and the lower bulging portion 136 are applied. In addition, the closeness of the lateral edge bulges 137 and 137 formed on those sides to the face can be enhanced. As the string member 200, it is preferable to use cotton or the like having excellent breathability, and by adjusting the position of the knot of the string member 200, the closeness to the face can be adjusted, and the degree of closeness between the mask 1 and the face can be adjusted. It is easy to adjust to relieve irritation to the skin. Further, the string member 200 is not limited to the method of supporting it on the head by hanging it on the ear, but may be a method of winding it around the back of the head and supporting it on the head, and the length can be set as required for each. It is also possible to form the string member 200 from a material containing rubber or elastic thread so that the face piece 100, particularly the inner layer 130, is in close contact with the face due to elasticity without adjusting the length.

The mask 1 of the present embodiment is attached by supporting the mask 1 on the head by hanging the string member 200 on the ear or the like. Since the string member 200 is inserted through the tubular upper bulging portion 135 and the lower bulging portion 136 as described above, the upper bulging portion 135, the lower bulging portion 136, and the side edge bulging of the inner layer 130 The protrusions 137 and 137 are in close contact with the face. As a result, the invasion of air particles from the outside through the upper, lower, left and right gaps between the inner layer 130 and the face is suppressed, and the diffusion of air particles (sprays) released from the wearer due to coughing or the like is prevented. It is suppressed.

An intermediate layer 120 is arranged in the front direction of the mouth and nostrils. Since the intermediate layer 120 has a structure having a high function of suppressing the passage of air particles, the invasion of air particles from the front direction of the wearer and the diffusion of air particles (sprays) in the front direction are suppressed. Further, even if the outer layer 110 is a material whose passage suppressing function of air particles is inferior to that of the intermediate layer 120, the passage of particles having a predetermined size is suppressed.

As described above, the mask 1 of the present embodiment has a high function of suppressing the invasion and diffusion of air particles in the front direction of the face piece 100, and also passes through the upper, lower, left and right gaps between the inner layer 130 and the face. It also has a high function of suppressing the invasion and diffusion of particles in the air. However, both the outer layer adjacent portion 140 and the inner layer 130 are made of a highly breathable three-dimensional fabric, and both are overlapped and communicated in the overlapping range 134. Therefore, air can flow in and out from above the mouth where the outer layer adjacent portion 140 is provided, preferably from above the nostrils. Therefore, even if the intermediate layer 120 has a high function of suppressing the passage of air particles, it does not make it difficult to breathe. That is, the mask 1 of the present embodiment can always maintain comfortable breathing even in the wearing state. Further, since the portion in contact with the face is the inner layer 130 made of a three-dimensional cloth in which air circulation is secured, it is difficult to get stuffy.

Therefore, it is suitable for long-term wearing and also suitable for wearing in hot seasons. It is also suitable not only for medical sites, but also for construction sites, sites where the body is frequently moved such as various factories, or as a mask to be worn during various exercises.

-Test example The tensile strength test of Mask 1 was performed as follows.
In particular,
(1) When the materials constituting the outer layer 110, the intermediate layer base member 121, and the inner layer 130 are pulled by themselves (reference numerals A to F in FIG. 10A).
(2) When the range sandwiching the seam of the two materials 110a and 110a constituting the outer layer 110 is pulled (reference numerals G and H in FIG. 10B).
(3) When the inner layer 130 sewn to form the upper bulging portion 135 and the lower bulging portion 136 is pulled (reference numerals I and J in FIG. 10B).
(4) When the range including the outer layer 110 and the outer layer adjacent portion 140 sewn to the outer layer 110 is pulled (reference numerals K and L in FIG. 10).
(5) When the outer layer 110, the outer layer adjacent portion 140, and the inner layer 130 are sutured and pulled in the vertical direction (reference numerals M and N in FIG. 10 (c)) and when pulled in the left-right direction (FIG. 10). Reference numerals O and P in (c)
Tested for.

The pulling direction was the left-right direction of the mask 1 (the winding direction (roll direction) of the material provided in the roll form) and the up-down direction.
The test was carried out by grasping the edge of each sample (length 200 mm) with a chuck of a tensile tester (grasping allowance 25 mm each, chuck interval 150 mm) and pulling at a speed of 50 mm / min.

Further, the outer layer 110 is made of cotton cloth, and the intermediate layer base member 121 constituting the intermediate layer 120 is manufactured by Asahi Kasei Corporation, product number: Y27013NP (thickness 1 mm), and the inner layer 130 and the outer layer adjacent portion are used. 140 is manufactured by Asahi Kasei Corporation, product number: AKE69337 (thickness 3.1 mm, ground knitted fabric (front): PET110dt / 48f false twisted yarn (35%), 8-course mesh, ground knitted fabric (back): PET55dt / 18f. Raw yarn (20%), Denbi structure, connecting yarn: Ny56dt / 1f (45%), course density: 41 / inch, wale density: 20 / inch, grain: 520 g / m)) were used.

10 (a) to 10 (c) are diagrams showing the measurement position, morphology, tensile direction, and tensile strength of each sample, and FIGS. 11 to 14 are graphs showing the measurement results of each sample. be.
As is clear from FIGS. 11 and 12, the intermediate layer base member 121 has, as a single characteristic, the average spring constant of the entire displacement region in the strength test obtained by the relationship between the displacement amount and the tensile strength (FIG. 11). E, F in FIG. 12), much higher than the outer layer 110 (A in FIG. 11 and B in FIG. 12) (about 10 times or more in the vertical direction and 20 times or more in the horizontal direction) and high rigidity. I understand. This retains the shape of the outer layer 110 made of a soft cotton cloth.

On the other hand, the spring constant shown by the displacement amount and the tensile strength in the practical range of the intermediate layer base member 121, that is, in the region where the displacement amount is 10 mm or less in actual use, is about 25 N in the vertical direction shown in FIG. Although it was / mm, it was 10 N / mm or less in the left-right direction shown in FIG. In addition, the tensile strength was higher in the left-right direction than in the up-down direction. From this result, it is found that the intermediate layer base member 121 is less likely to be deformed in the vertical direction than in the horizontal direction, and is displaced back and forth with breathing to make it difficult to breathe like a general non-woven fabric mask. Can be suppressed. Further, the spring constant of 10 N / mm or less in the practical range is close to the spring constant of human muscles, and has a characteristic that it is difficult to feel a sense of discomfort when worn.

As shown in Patent Document 2, the spring constant of the human muscle referred to here is the muscle of the buttocks of a person pressurized at a speed of 50 mm / min with a pressure plate having a diameter of 98 mm in a range of a load of up to 100 N. The load-deflection characteristic, which is a spring constant obtained from the load and displacement, and is in the range of 10 N / mm or less, preferably 1 to 10 N / mm.

Further, as shown in FIGS. 11, 13 and 14, the inner layer 130 is displaced during normal use in both the vertical direction (C in FIG. 11 and C in FIG. 13) and the horizontal direction (D in FIG. 14). Not only in the practical range with an amount of 10 mm or less, but also in the total displacement region until breaking in the tensile strength test, the spring constant was 10 N / mm or less, which was close to the spring constant of human muscle. Since the inner layer 130 is in direct contact with the wearer's face, the fact that the inner layer 130 exhibits characteristics similar to those of human muscles greatly contributes to suppressing discomfort during wearing. Further, from FIGS. 13 and 14, the inner layer 130 also had a spring constant in the practical range lower in the left-right direction than in the up-down direction, while the tensile strength was higher in the left-right direction than in the up-down direction. As a result, the back-and-forth movement of the inner layer 130 accompanying breathing is suppressed, and the adhesion to the nose and mouth as in a general non-woven fabric mask is suppressed. It should be noted that the point that a feeling of strangeness at the time of mounting can be suppressed is the same in the outer layer adjacent portion 140 using the same material as the inner layer 130.

Further, the symbols O, N, and P in FIG. 12 show the characteristics of combining the outer layer (cotton cloth) 110 and the inner layer (AKE69337) 130. Of these, reference numeral O is a characteristic in which the portion of the inner layer 130 without a sewing line and the outer layer 110 are combined. On the other hand, the reference numeral N is a characteristic in the range including the upper bulging portion 135 formed by the sewing line 135a, and the reference numeral P is the upper bulging portion 135 formed by the sewing line 135a and the sewing line 136a. It is a characteristic of the range including the lower bulging portion 136 formed. It can be seen that the rigidity is higher than that of the symbol O by having the upper bulging portion 135 and the lower bulging portion 136 formed by the sewing lines 135a and 136a. Therefore, the portion of the inner layer 130 without the sewing line tends to follow the shape of the face. On the other hand, the upper bulging portion 135 and the lower bulging portion 136 have high rigidity, but the string member 200 is passed through the upper bulging portion 135 and the lower bulging portion 136. Even a highly rigid part can easily follow the shape of the face.

15 to 18 are diagrams for explaining the mask 1A according to another embodiment of the present invention. The members having the same functions as those in the above embodiment are designated by the same reference numerals. The mask 1A of the present embodiment is configured to include a face piece 100 and a string member 200. The face piece 100 has an outer layer 110, an intermediate layer 120, and an inner layer 130, as in the above embodiment. However, there is no portion corresponding to the outer layer adjacent portion 140 in the above embodiment, and the visor portion 150 is integrated by sewing on the upper portion of the outer layer 110.

The outer layer 110 is made of a breathable material, and for example, cotton can be used because it has high water absorption and a refreshing feeling. The size is such that the central part in the width direction almost coincides with the virtual line passing through the bridge of the nose when worn, and the size extends to the range where both sides almost cover the cheeks. The visor portion 150, which is sewn and integrated into the upper part of the outer layer 110, is made of a material having the same breathability and water absorption as the outer layer 110, preferably cotton, and can cover the tip of the nose. It has a curved shape so that the substantially central portion in the width direction protrudes upward. Further, it is formed by laminating two materials (for example, cotton), and two sewing lines 151a and 151a are formed at intervals near the upper edge portion, and the two sewing lines 151a and 151a are formed. An insertion portion 151 through which the string member 200 is inserted is formed between the visor portions 150 along the width direction.

The intermediate layer 120 is formed of a material having a function of suppressing the passage of particles in the air. Preferably, a film, a sheet or a thin plate made of a synthetic resin is used, and particles in the air do not penetrate in the thickness direction and are blocked. As such a material, a sheet made of the polyurethane elastomer exemplified in the above embodiment can be used (for example, manufactured by Seadam Co., Ltd., product number: DUS605-CDR).

The intermediate layer 120 is formed so as to have a shape in which substantially the central portion in the width direction protrudes forward. Specifically, as shown in FIG. 18A, a substantially triangular notch 123d is formed upward from the lower edge portion at the substantially central portion in the width direction. When the lower edge portion side of the notch 123d is brought close to each other in the width direction to be in the state shown in FIG. 18B, the apex portion 123d1 of the notch 123d protrudes forward as shown in FIG. 18C. do.

The intermediate layer 120 has a width substantially equal to or wider than the width of the mouth, but is formed with a width narrower than that of the outer layer 110 and the inner layer 130 (see FIG. 17).

As the inner layer 130, a three-dimensional fabric is used as in the above embodiment, and a three-dimensional three-dimensional knitted fabric such as Asahi Kasei Corporation, product number: AKE69337 is preferably used. The inner layer 130 is wider than the intermediate layer 120 and is formed to be substantially the same size as the outer layer 110. The peripheral edge of the intermediate layer 120 is joined to the inner layer 130 by sewing (see FIG. 16). At that time, the lower edge portions of the notch 123d of the intermediate layer 120 are brought close to each other (see FIG. 18B), and sewing is performed along the sewing line shown outside the reference numeral 123d in FIG. As a result, the apex portion 123d1 of the notch 123d protrudes forward (see FIG. 18C). At this time, even if the lower edge portions of the notch 123d are brought close to each other, a gap is generated between the apex portion 123d1 and the brought-down lower edge portion. This gap becomes an air flow passage. Even when this flow path is open, the inner layer 130 suppresses the intrusion of air particles. However, in order to enhance the effect of suppressing the intrusion of particles in the air, it is preferable to insert the three-dimensional fabric constituting the inner layer 130 into the gap and pull it out to the surface side of the intermediate layer 120 (within reference numeral 123d in FIG. 16). The part of the inner layer 130 shown in the direction). The inserted three-dimensional fabric constituting the inner layer 130 is sandwiched by gaps, and the three-dimensional fabric is partially doubled or tripled. Therefore, the gaps between the threads and fibers constituting the three-dimensional fabric are reduced, and the particles in the air Invasion suppression effect is enhanced.

It is preferable that the intermediate layer 120 has such rigidity that the apex 123d1 of the notch 123d can be maintained in a state of protruding forward. The polyurethane elastomer sheet (product number: DUS605-CDR) manufactured by Seadam Co., Ltd. has a predetermined thickness, hardness and the like, and is therefore one of the materials satisfying such conditions. Further, in the present embodiment, a notch 123e is also formed in the upper part of the intermediate layer 120, and this notch 123e also serves as an air flow passage. It is preferable that the notch 123e is also sewn to the inner layer 130 so that the upper edge portion side is close to each other. In the present embodiment, sewing is performed along the sewing line shown outside the reference numeral 123e in FIG. As a result, the shape of the notch 123d protruding forward near the apex portion 123d1 is assisted. Further, the three-dimensional fabric constituting the inner layer 130 is inserted into the notch 123e in double or triple layers (the portion of the inner layer 130 indicated inside the reference numeral 123e in FIG. 16) and fixed by sewing. This is preferable because the effect of suppressing the intrusion of particles in the air is enhanced.

Here, of the inner layer 130, the range outside the position where the intermediate layer 120 is sewn is in contact with the vicinity of the wearer's cheek. Since the three-dimensional fabric constituting the inner layer 130 has high breathability and is close to the characteristics of the muscle, it may be contacted as it is as in the above embodiment, but the intermediate layer 120 is sewn in order to easily absorb sweat. It is preferable to provide a soft and highly water-absorbent material as the contact layer 170 in the range outside the position (see FIG. 16). Examples of such a material include the same cotton as the outer layer 110.

At the lower part of the face piece 100, a tubular portion 180 provided along the width direction of the face piece 100 is formed. Further, as described above, the visor portion 150 is formed with an insertion portion 151 along the width direction. One string member 200 for supporting the face piece 100 on the head is used in this embodiment, and is inserted into the insertion part 151 of the tubular part 180 and the visor part 150 located at the lower part of the face piece 100. Specifically, for example, first, one end portion 200a of the string member 200 is inserted into the insertion portion 151 from one end side of the insertion portion 151 of the visor portion 150. The one end portion 200a is pulled out to the opposite end portion of the insertion portion 151, is turned in a substantially U shape on the outer side in the width direction of one side of the face body 100, and is inserted into the tubular portion 180 provided at the lower part of the face body 100. Then, it is pulled out from the end portion of the tubular portion 180 opposite to the end portion on the insertion side. As a result, one end 200a and the other end 200b of the string member 200 are located outside the other width direction of the face piece 100, and both can be connected. Thereby, the string member 200 can be hung on both ears, or depending on the length of the string member 200, it can be turned toward the back of the head and tied to support the face piece 100 in front of the mouth and nose.

Since the string member 200 passes through the insertion portion 151 of the visor portion 150 in the width direction, the upper edge portion of the visor portion 150 is pulled by putting it on the ear, and the adhesion to the nose can be improved. .. Similarly, since the string member 200 passes through the tubular portion 180 provided at the lower part of the face piece 100 in the width direction, the adhesion to the jaw can be improved by putting it on the ear.

According to the present embodiment, the intermediate layer 120 is formed of a material having a function of suppressing the passage of particles in the air higher than that of the outer layer 110, has a predetermined rigidity, and has a substantially central portion in the width direction forward. It is formed so as to have a protruding shape. Further, the intermediate layer 120 has notches 123d and 123e, and a three-dimensional fabric constituting the inner layer 130 is inserted in the notches 123d and 123e. As a result, the cutouts 123d and 123e serve as an air flow portion, and the three-dimensional fabric is inserted to suppress the invasion of air particles through the cutouts 123d and 123e. Further, the outer layer 110 and the contact layer 170 are formed of a highly breathable material, and the inner layer 130 is also formed of a highly breathable three-dimensional fabric. Therefore, a space portion in which sufficient air is always present is formed between the face piece 100 and the wearer's mouth or nostril (see FIG. 18C), and smooth breathing can be realized.

Also in the mask 1 according to the embodiment shown in FIGS. 1 to 14, by making the configuration of the intermediate layer 120 the same as that of the present embodiment, the face piece 100 has a shape in which the substantially central portion in the width direction protrudes forward. Of course, it is possible to maintain the space, thereby forming a space.

1,1A Mask 100 Facet 110 Outer layer 120 Intermediate layer 121 Intermediate layer Base member 130 Inner layer 134 Overlapping range 135 Upper bulge 136 Lower bulge 137 Side edge bulge 140 Outer layer adjacent part 150 Visor part 200 String Element

Claims (22)

1. A mask having a facet and a string member for supporting the facet to the head.
   The facet is
   It has an outer layer, an intermediate layer and an inner layer, and has an outer layer adjacent portion joined to at least a part of the peripheral portion of the outer layer.
   The outer layer and the intermediate layer have a size capable of covering at least the mouth, and the inner layer has a size partially overlapped with the portion adjacent to the outer layer.
   At least one of the outer layer and the intermediate layer has a function of suppressing the passage of particles in the air.
   A mask characterized in that both the inner layer and the portion adjacent to the outer layer are formed of a three-dimensional fabric, and an air flow path is formed between the inner layer and the portion adjacent to the outer layer.
2. The portion adjacent to the outer layer is joined to the upper edge portion of the outer layer.
   The inner layer extends above the range of the outer layer and has a size extending to the range of the outer layer adjacent portion, and the upper edge portion is joined to the outer layer adjacent portion, and the lower edge portion is said. The mask according to claim 1, which is joined to the outer layer.
3. The mask according to claim 2, wherein the inner layer has a displacement suppressing portion for reducing friction due to displacement during mounting.
4. The displacement suppressing portion is configured to have an upper bulging portion provided on the upper side of a range substantially corresponding to the mouth when mounted and a lower bulging portion provided on the lower side of a range substantially corresponding to the mouth when mounted. The mask according to claim 3.
5. The mask according to claim 4, wherein the upper bulging portion and the lower bulging portion are formed between sewing lines sewn in a substantially horizontal direction at intervals of upper and lower parts, respectively.
6. The string member is provided along the range in which the upper bulge and the lower bulge are provided, and by supporting the string member on the head, the upper bulge and the lower bulge are provided. The mask according to claim 4 or 5, which enhances the degree of closeness to the face.
7. In the inner layer, on at least one of the upper side and the lower side of the range substantially corresponding to the mouth when worn, high-density lines having a relatively higher density of fibers or threads than the other parts are formed substantially in the vertical direction. The mask according to any one of claims 3 to 6, which is formed at one or more locations along the line.
8. The mask according to claim 7, wherein the high-density line is formed by sewing.
9. The mask according to claim 7 or 8, wherein an air flow portion penetrating in the thickness direction is formed at a portion of the intermediate layer corresponding to the high-density line.
10. The mask according to any one of claims 1 to 5, wherein a visor portion that protrudes in the nose direction and can cover the tip of the nose is provided in the portion adjacent to the outer layer.
11. The string member is composed of one, passes through the lower part of the face piece and the visor portion along the width direction thereof, is turned on the outside in the width direction of one, and both ends are tied on the outside in the width direction of the other. The mask according to claim 10, which is supported on the head.
12. The intermediate layer is formed by using a material having a higher rigidity than the outer layer, maintains a shape in which the substantially central portion in the width direction of the face piece protrudes forward, and creates a space portion between the intermediate layer and the wearer's mouth. The mask according to any one of claims 1 to 11, which is to be formed.
13. 12. The twelfth aspect of claim 12, wherein the intermediate layer is formed of a material having a higher function of suppressing the passage of air particles than the outer layer, and the outer layer is formed of a fabric having a higher air permeability than the intermediate layer. mask.
14. The mask according to any one of claims 1 to 13, wherein the three-dimensional fabric is a three-dimensional three-dimensional knitted fabric having a ground knitted fabric on the front and back sides and a connecting thread connecting the ground knitted fabrics on the front and back sides.
15. The inner layer has a spring characteristic of 50 mm / min using a pressure plate having a diameter of 98 mm in both the left-right direction and the up-down direction in the practical range as a spring characteristic obtained by the relationship between the displacement amount and the tensile strength in the tensile strength test. The mask according to any one of claims 1 to 14, which is a value close to the spring constant of a human muscle obtained when the pressure is increased to 100 N.
16. The intermediate layer has a spring characteristic obtained in relation to the displacement amount and the tensile strength in the tensile strength test, in which the horizontal spring constant in the practical range is lower than the vertical spring constant, and the horizontal spring in the practical range. The mask according to any one of claims 1 to 15, wherein the characteristic is a value close to the spring constant of a human muscle obtained when a pressure plate having a diameter of 98 mm is pressed to 100 N at 50 mm / min. ..
17. The mask according to any one of claims 1 to 16, wherein both the intermediate layer and the inner layer have a lower spring constant and a higher tensile strength in the horizontal direction than in the vertical direction.
18. A mask having a facet and a string member for supporting the facet to the head.
    The facet is
    It is composed of an outer layer, an intermediate layer and an inner layer.
    The outer layer is made of a breathable material
    The intermediate layer is formed of a material having a higher function of suppressing the passage of particles in the air than the outer layer.
    The inner layer is formed from a three-dimensional fabric and is
    The material constituting the intermediate layer has a rigidity for maintaining a shape in which a substantially central portion in the width direction protrudes forward, and a space portion is formed between the face piece and the wearer's mouth. mask.
19. The mask according to claim 18, wherein the intermediate layer is provided with an air flow portion penetrating in the thickness direction, and a three-dimensional fabric constituting the inner layer is inserted in the air flow portion.
20. In the intermediate layer, a substantially triangular notch extending upward from the lower edge portion is formed at a substantially central portion in the width direction, and this notch constitutes the air flow portion and the lower edge of the notch. The mask according to claim 18 or 19, wherein the portions are joined to the inner layer so as to be close to each other in the width direction, and the apex portion of the notch protrudes forward.
21. The mask according to any one of claims 18 to 20, wherein the outer layer is provided with a visor portion that protrudes in the nose direction and can cover the tip of the nose.
22. The string member is composed of one, passes through the lower part of the face piece and the visor portion along the width direction thereof, is turned on the outside in the width direction of one, and both ends are tied on the outside in the width direction of the other. 21. The mask according to claim 21, which is supported on the head.

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