Mask

Abstract

To provide a mask which allows the efficacy of a functional agent to be imparted while securing the air permeability of a mask body.SOLUTION: A mask (1) comprises: a longitudinal direction (Y) corresponding to a vertical direction of a wearer; a lateral direction (X) corresponding to a lateral direction of the wearer; and a mask body (10) covering at least lips and nostrils of the wearer. The mask body has an air-permeable base material sheet (11) having a fiber material. The base material sheet has fine particle adhered regions (R1) where fine particles containing a functional agent are adhered. In a first direction which is one of the longitudinal direction and the lateral direction, the plurality of fine particle adhered regions (R1) are disposed at intervals.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mask.

Background Art

[0002] Patent Document 1 discloses a mask including a breathable mask body that covers at least the lips and nostrils of a wearer. The mask body of Patent Document 1 has a particulate adhesion region to which fine particles containing a fragrance as a functional agent are adhered. As shown in FIGS. 8 and 9 of Patent Document 1, the particulate adhesion region of Patent Document 1 is arranged over the entire lateral direction of the mask body and over a region of at least half of the longitudinal direction including the center in the longitudinal direction of the mask body. By arranging the particulate adhesion region so as to cover the lips and nostrils, the effect of the fragrance can be imparted to the wearer.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] While the particulate adhesion region of Patent Document 1 can impart the effect of the fragrance to the wearer by being arranged to cover the lips and nostrils, the wearer may feel short of breath due to the presence of the particulate adhesion region. More specifically, in the particulate adhesion region, the gaps between the fibers of the sheet are partially blocked by the fine particles. Therefore, while the effect of the functional agent can be imparted by the fine particles, the breathability is reduced due to the presence of the fine particles, and the wearer may feel short of breath.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a mask that can impart the effect of a functional agent while ensuring the breathability of the mask body.

Means for Solving the Problems

[0006] A mask according to one aspect includes a vertical direction corresponding to the up-and-down direction of the wearer, a horizontal direction corresponding to the left-and-right direction of the wearer, and a mask body that covers at least the lips and nostrils of the wearer. The mask body has a breathable base sheet made of a fiber material. The base sheet has a particulate adhesion region to which fine particles containing a functional agent are attached. In a first direction that is one of the vertical direction and the horizontal direction, a plurality of the particulate adhesion regions are arranged at intervals.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0008] (1) Outline of the Embodiment At least the following matters become clear from the description of this specification and the attached drawings. The mask according to Aspect 1 includes a longitudinal direction corresponding to the up-and-down direction of the wearer, a lateral direction corresponding to the left-and-right direction of the wearer, and a mask body that covers at least the lips and nostrils of the wearer. The mask body has a breathable base sheet made of a fiber material. The base sheet has a particulate adhesion region to which fine particles containing a functional agent are attached. In a first direction, which is one of the longitudinal direction and the lateral direction, a plurality of the particulate adhesion regions are arranged at intervals. According to this aspect, since the base sheet constituting the mask body is provided with the particulate adhesion region to which the fine particles are attached, the efficacy of the functional agent can be imparted to the wearer through the particulate adhesion region. Also, in the particulate adhesion region, the gaps between the fibers of the base sheet are partially blocked by the fine particles. Therefore, while the efficacy of the functional agent can be imparted by the fine particles, the breathability of the particulate adhesion region of the base sheet becomes relatively low. However, since the particulate adhesion region is not provided over the entire area of the base sheet and is arranged at intervals in the first direction, breathability can be ensured in the intermediate region between the particulate adhesion regions. Thus, the efficacy of the functional agent can be imparted while ensuring the breathability of the mask body.

[0009] According to a preferred aspect, the invention according to Aspect 2 may have the following features in the invention according to Aspect 1. The air permeability resistance value of the intermediate region arranged between the particulate adhesion regions in the base sheet measured by a KES air permeability tester is lower than the air permeability resistance value of the particulate adhesion region. According to this aspect, breathability can be ensured in the intermediate region between the particulate adhesion regions, and the efficacy of the functional agent can be imparted while ensuring the breathability of the mask body.

[0010] According to a preferred aspect, the invention according to Aspect 3 may have the following features in the invention according to Aspect 2. The fine particles are microcapsules encapsulating the functional agent. According to this aspect, since the functional agent is encapsulated in the microcapsules, volatilization before use is suppressed, and it becomes easier to impart the efficacy of the functional agent during use. For example, the efficacy of the functional agent can be generated by the destruction of the microcapsules during the mask wearing operation or during wearing.

[0011] According to a preferred embodiment, the invention according to Embodiment 4 may have the following features in the invention according to any one of Embodiments 1 to 3. The intermediate region disposed between the fine particle adhesion regions in the base sheet may be disposed across the center of the mask body in the first direction. Whether the first direction is the vertical direction or the horizontal direction, the center of the mask body in the first direction is disposed in the vicinity of the lips and nostrils. According to this embodiment, by disposing an intermediate region having relatively high air permeability across the center of the mask body in the first direction, air permeability at the lips and nostrils can be ensured. Therefore, the efficacy of the functional agent can be efficiently imparted while ensuring air permeability.

[0012] According to a preferred embodiment, the invention according to Embodiment 5 may have the following features in the invention according to any one of Embodiments 1 to 4. The fine particle adhesion regions are disposed across the entire area of the base sheet in a second direction which is the other of the vertical direction and the horizontal direction. According to this embodiment, by providing the fine particle adhesion regions spaced apart in the first direction across the entire area in the second direction, the areas of the region for imparting the efficacy of the functional agent and the region for ensuring air permeability are ensured, and it becomes easier to obtain both effects.

[0013] According to a preferred embodiment, the invention according to Embodiment 6 may have the following features in the invention according to any one of Embodiments 1 to 5. The first direction is the lateral direction. The fine particle adhesion region is arranged at a distance from the outer edge of the base material sheet in the longitudinal direction. According to this embodiment, since the first direction is the lateral direction and the intermediate region is provided in a certain range extending in the longitudinal direction, when the wearer moves their mouth, the mask body is likely to deform in the longitudinal direction. At this time, since a relatively highly breathable intermediate region is provided in a certain range extending in the longitudinal direction, even when the mask body deforms due to the movement of the mouth, the breathability can be continuously ensured. In addition, the fine particle adhesion region is arranged at a distance from the outer edge in the longitudinal direction of the base material sheet, and no fine particles are adhered to the outer edge in the longitudinal direction of the base material sheet. The rigidity of the outer edge of the mask body is suppressed from increasing and is likely to deform. Therefore, the fit around the nose and jaw where the outer edge of the mask body is applied is improved, air exchange through the mask body is likely to occur, and air can be effectively taken into the mask.

[0014] According to a preferred embodiment, the invention according to Embodiment 7 may have the following features in the invention according to any one of Embodiments 1 to 5. The first direction is the longitudinal direction. The fine particle adhesion region is continuous from one outer edge to the other outer edge of the base material sheet in the lateral direction. According to this embodiment, since the fine particle adhesion region is continuous from one outer edge to the other outer edge of the base material sheet in the lateral direction, a functional agent can be applied over a wide lateral range straddling the left and right cheeks, making it easier for the wearer to feel the efficacy of the functional agent.

[0015] According to a preferred embodiment, the invention according to Embodiment 8 may have the following features in the invention according to any one of Embodiments 1 to 7. The intermediate region arranged between the fine particle adhesion regions in the base material sheet is arranged on both sides of the center of the mask body in the first direction. According to this embodiment, by providing intermediate regions on both sides of the center of the mask body in the first direction, which is arranged near the lips and nostrils, the lips and nostrils can be sandwiched between highly breathable regions, suppressing a feeling of stuffiness.

[0016] According to a preferred aspect, the invention according to aspect 9 may have the following features in the invention according to aspect 8. The first direction is the vertical direction. The area of the intermediate region located above the center of the mask body in the first direction is larger than the area of the intermediate region located below the center of the mask body in the first direction. According to this aspect, the air permeability to the nostrils can be further enhanced.

[0017] According to a preferred aspect, the invention according to aspect 10 may have the following features in the invention according to aspect 8. The first direction is the vertical direction. The area of the intermediate region located below the center of the mask body in the first direction is larger than the area of the intermediate region located above the center of the mask body in the first direction. According to this aspect, the air permeability to the lips can be further enhanced.

[0018] According to a preferred aspect, the invention according to aspect 11 may have the following features in the invention according to any one of aspects 1 to 10. The mask body is disposed outside the base sheet and has a breathable outer sheet made of a fiber material. The air permeability resistance value of the outer sheet is higher than the air permeability resistance value of the base sheet. According to this aspect, since the air permeability resistance value of the outer sheet located outside the base sheet with fine particles attached is high, it is possible to suppress the fine particles from coming out to the outside, easily retain the fine particles inside the mask, and impart the efficacy of the functional agent to the wearer.

[0019] According to a preferred aspect, the invention according to aspect 12 may have the following features in the invention according to any one of aspects 1 to 11. The mask body is disposed inside the base sheet and has a breathable inner sheet made of a fiber material. The air permeability resistance value of the inner sheet is higher than the air permeability resistance value of the base sheet. According to this aspect, since the air permeability resistance value of the inner sheet located inside the base sheet with fine particles attached is high, it is possible to suppress the fine particles from coming out to the skin side, and suppress the fine particles from adhering to the skin or entering the mouth or the like.

[0020] According to a preferred embodiment, the invention according to aspect 13 may have the following features in the invention according to any one of aspects 1 to 12. The mask body is folded into a pleated shape by a mountain fold line that folds the mask body into a mountain fold shape protruding outward in the vertical direction and a valley fold line that folds the mask body into a valley fold shape protruding inward in the vertical direction. In the pleated fold portion, a fine particle adhesion region and an intermediate region disposed between the fine particle adhesion regions in the base material sheet are disposed. When the mask is worn, the pleated fold portion deforms due to movements such as those of the mouth. At this time, the fine particle adhesion region has high rigidity due to the adhesion of fine particles, and the presence of the fine particle adhesion region can increase the rigidity of the fold portion. Therefore, the shape of the fold portion can be maintained, and it becomes easier to secure the space around the mouth. In addition, since an intermediate region is provided in the fold portion, air permeability around the mouth can be ensured. Further, when the fine particles are in a form constituted by microcapsules, the microcapsules are easily broken when the fold portion is deformed, and it becomes easier to impart the efficacy of the functional agent when worn.

[0021] According to a preferred embodiment, the invention according to aspect 14 may have the following features in the invention according to aspect 13. The fine particle adhesion region is disposed across each of the mountain fold line and the valley fold line that are adjacent to each other in the vertical direction. According to this embodiment, since the rigidity of each of the adjacent valley fold line and mountain fold line can be increased, the deformation of the cup portion formed by the valley fold and the mountain fold can be maintained. By maintaining the cup shape formed by the valley fold and the mountain fold, a decrease in surface area due to cup collapse can be suppressed, and it becomes easier to secure the space around the mouth.

[0022] According to a preferred embodiment, the invention according to aspect 15 may have the following features in the invention according to aspect 14. The intermediate region is disposed between the mountain fold line and the valley fold line. According to this configuration, while maintaining the cup shape formed by the valley fold and the mountain fold and suppressing a decrease in surface area due to cup collapse, air permeability of the cup-shaped portion can be ensured, and the fluidity of exhaled air can be increased.

[0023] According to a preferred embodiment, the invention according to Embodiment 16 may have the following features in the invention according to any one of Embodiments 1 to 12. It has a pair of ear-hanging portions joined to both lateral sides of the mask body in the lateral direction. The mask body is folded based on a central fold line extending in the longitudinal direction at the center in the lateral direction of the mask body before use. The ear-hanging portions extend outward in the lateral direction from the edge on the side opposite to the central fold line among the lateral edges of the mask body. In a state where the mask body is folded, the central fold line curves so as to bulge outward in the lateral direction downward from the upper end of the central fold line and bulge outward in the lateral direction upward from the lower end of the central fold line. The fine particle adhesion region is arranged in a region extending inward in the lateral direction from the edge on the side opposite to the central fold line. The intermediate region arranged between the fine particle adhesion regions straddles the central fold line. According to this embodiment, the central fold line is located at the apex of the cup shape when the mask is worn and is arranged to face the mouth and nose. By arranging an intermediate region with relatively high air permeability across the central fold line, air permeability at the mouth and nose can be ensured. Therefore, air permeability can be ensured while imparting the efficacy of the functional agent. Also, the region extending inward in the lateral direction from the edge on the side opposite to the central fold line is a region that is pulled outward in the lateral direction by the ear-hanging portions and is likely to adhere to the cheeks. By arranging the fine particle adhesion region in this region, the efficacy of the functional agent can be efficiently imparted to the wearer.

[0024] According to a preferred embodiment, the invention according to Embodiment 17 may have the following features in the invention according to Embodiment 16. In the folded state of the mask body, the lateral length of the intermediate region is 1 / 3 or less of the longitudinal length a of the central fold line. Generally, the lips and nostrils of the wearer are arranged within a distance of 1 / 3 of a in the lateral direction outward from the central fold line when the longitudinal distance of the intermediate region is a. By arranging the intermediate region in this region, the air permeability near the nose and mouth where there is a lot of inflow of exhaled air can be further improved. Also, the efficacy of the functional agent can be imparted in the region where the lips and nostrils are not arranged.

[0025] (2) Mask according to the first embodiment Hereinafter, with reference to the drawings, mask 1 according to the first embodiment will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the ratios of the dimensions and the like are different from the actual ones. Therefore, specific dimensions and the like should be determined with reference to the following description. Also, there may be parts where the relationships and ratios of the dimensions between the surfaces are different from each other. FIG. 1 is a view showing the mask according to the first embodiment. FIG. 1(A) is a plan view seen from the outside of the mask, and FIG. 1(B) is a schematic cross-sectional view taken along the line A-A shown in FIG. 1(A). Mask 1 may be disposable or may be repeatedly used. Mask 1 may be worn to protect the wearer from droplets, pollen, dust, blood, etc.

[0026] Mask 1 has an inner side Z1 facing the wearer's face, an outer side Z2 which is the opposite side thereof, a thickness direction Z extending between them, a longitudinal direction Y corresponding to the up and down direction of the wearer and extending upward and downward, and a lateral direction X corresponding to the left and right direction of the wearer and extending left and right in a front view. Mask 1 has a mask body 10. The mask body 10 is configured to cover at least the lips and nostrils of the wearer. The mask body 10 may be rectangular and long in the lateral direction X.

[0027] The mask body 10 may have one or a plurality of overlapping sheets. More specifically, the mask body 10 may have a breathable base sheet 11 made of a fibrous material. Further, the mask body 10 may have at least one of a breathable outer sheet 12 made of a fibrous material and arranged outside the base sheet 11 and a breathable inner sheet 13 made of a fibrous material and arranged inside the base sheet 11. The base sheet 11, the outer sheet 12, and the inner sheet 13 may be joined via a sheet joint portion 14. The base sheet 11, the outer sheet 12, and the inner sheet 13 may be made of a non-woven fabric or a woven fabric. The base sheet 11 may be made of, for example, a melt-blown non-woven fabric containing polypropylene fibers, the outer sheet 12 may be made of a spunbond non-woven fabric containing polypropylene fibers, and the inner sheet 13 may be made of a spunbond non-woven fabric containing polypropylene fibers and polyethylene fibers.

[0028] The mask 1 may have an ear-hanging portion 20 that is hung on the ears of the wearer during wearing. The ear-hanging portion 20 extends outward in the lateral direction X from both side portions of the mask body 10 in the lateral direction X. The ear-hanging portion 20 may be formed separately from the mask body 10 and joined to the mask body 10, or may be integrally formed with the mask body 10. The ear-hanging portion 20 of the present embodiment is formed separately from the mask body 10 and is joined to the mask body 10 via a body joint portion 25. The body joint portion 25 is provided along the longitudinal direction Y. In the front view of the first embodiment, the ear-hanging portion 20 is located on the back side of the mask body 10 and is illustrated by a dotted line.

[0029] The mask body 10 may be folded into a pleated shape by a mountain fold line MF that folds the mask body 10 into a mountain fold shape protruding outward in the vertical direction Y, and a valley fold line VF that folds the mask body 10 into a valley fold shape protruding inward in the vertical direction Y. Both the mountain fold line MF and the valley fold line VF are fold lines extending in the horizontal direction X. More specifically, the mountain fold line MF is folded into a mountain fold shape protruding outward in the vertical direction Y with reference to the center 10YC of the mask body 10 in the vertical direction Y. The valley fold line VF is folded into a valley fold shape protruding inward in the vertical direction Y with reference to the center 10YC. In the mask body 10 of the first embodiment, a first fold line F1 that is a mountain fold line MF, a second fold line F2 that is a valley fold line VF, a third fold line that is a mountain fold line MF, and a fourth fold line F4 that is a valley fold line VF are formed on both sides (upper and lower sides respectively) of the vertical direction Y sandwiching the center of the mask body 10 in the vertical direction Y.

[0030] The first fold line F1 is arranged in a pair with the center of the mask body 10 in the vertical direction Y interposed therebetween. The second fold line F2 folds the region extending inward in the vertical direction Y from the first fold line F1 inward in the thickness direction Z1 and toward the outside in the vertical direction Y. The third fold line F3 folds the region extending outward in the vertical direction Y from the second fold line F2 inward in the thickness direction Z1 and toward the inside in the vertical direction Y. The third fold line F3 is located outside the first fold line F1 in the vertical direction Y. The fourth fold line F4 folds the region extending inward in the vertical direction Y from the third fold line F3 inward in the thickness direction Z1 and toward the outside in the vertical direction Y. The fourth fold line F4 is located outside the second fold line F2 in the vertical direction Y. The pleated portion 18 folded in a pleated shape is formed by these mountain fold lines MF and valley fold lines VF. The pleated portion 18 is a portion where the mask body 10 can be deformed into a three-dimensional shape (for example, a cup shape) by deforming the mask body 10 with the fold lines as a base point. The range of the pleated portion 18 is the portion sandwiched by the fold line located most outside in the vertical direction Y in the unfolded state of the fold lines. In the first embodiment, it is the region sandwiched in the unfolded state by the fourth fold line F4 arranged at a distance in the vertical direction Y. When worn, the mask body 10 has a cup shape that gradually protrudes outward in the thickness direction Z2 from the fourth fold line F4 toward the first fold line F1 side with the fourth fold line F4 as the inner base point.

[0031] The mask 1 of the present embodiment is configured to be able to impart the efficacy of the functional agent while ensuring the air permeability of the mask body 10. Next, the configuration for imparting the efficacy of the functional agent while ensuring the air permeability of the mask body 10 will be described in detail. The base sheet 11 has a fine particle adhesion region R1 to which fine particles 16 containing a functional agent are adhered. Since the fine particle adhesion region R1 is provided in the base sheet 11 constituting the mask body 10, the efficacy of the functional agent can be imparted to the wearer through the fine particle adhesion region R1. The fine particle adhesion region R1 is the region hatched in the drawing.

[0032] The functional agent is not particularly limited, and any functional agent can be adopted according to the desired additional functions, effects, etc. Such functional agents include, for example, fragrances, warming agents, cooling agents, heat-generating agents, antibacterial agents, pH adjusters, skin care agents, deodorants, and the like. These functional agents may be used alone or in combination of two or more kinds. Further, the functional agent may be in any form of liquid, solid, thickened forms thereof, and gel-like. The fine particles containing the functional agent may be those in which the functional agent itself is formed into a granular shape, or those encapsulating the functional agent (for example, capsules).

[0033] Preferably, the fine particles 16 may be microcapsules encapsulating the functional agent. Since the functional agent is encapsulated in the microcapsules, volatilization before use is suppressed, and it becomes easier to impart the efficacy of the functional agent during use. For example, the efficacy of the functional agent can be generated by the microcapsules being broken during the wearing operation or during wearing of the mask 1.

[0034] The fine particles 16 may be non-water-absorbing and water-insoluble fine particles. The non-water-absorbing and water-insoluble fine particles may be inorganic fine particles or organic fine particles. Examples of the inorganic fine particles include calcium carbonate, clay, titanium dioxide, talc, barium sulfate, amorphous silica, alumina, and the like. As the organic fine particles, styrene-based plastic pigments, acrylic-based plastic pigments, which are known synthetic organic pigments, polyethylene, microcapsules, organic white pigments such as urea resin and melamine resin, and the like can be used. Further, phenolic resins such as phenol formaldehyde resin, phenol acetaldehyde resin, phenol acetylene resin, terpene phenol resin and their polyvalent metal salts, salicylic acid and its metal salts (especially zinc salt), sulfonylurea compounds, and the like can also be used.

[0035] The fine particle adhesion region R1 is the region where the fine particles 16 are adhered when viewed in plan view. The fine particle adhesion region R1 can be determined by observing the surface of the base sheet 11 with an electron microscope. In FIG. 2, an enlarged photograph of the fine particle adhesion region R1 and an enlarged photograph of the region where no fine particles are adhered (intermediate region R2) are shown. In the fine particle adhesion region R1, the fine particles 16 are attached onto the fibers 15 constituting the base sheet 11. The fine particles 16 may be arranged alone or may be attached integrally with other fine particles. On the other hand, in the region R2 where no fine particles are adhered, the fine particles 16 are not attached onto the fibers 15 constituting the base sheet 11.

[0036] The method of attaching the fine particles 16 to the base sheet 11 is not particularly limited. For example, the fine particles may be attached via an adhesive. Preferably, they may be attached to the fibers 15 of the base sheet 11 by a binder. Since the fine particles are attached to the fiber material of the base sheet 11 by the binder, the fine particles 16 are less likely to move or fall off from the base sheet 11 during manufacturing, use, and after absorbing body fluid, and it is easy to maintain the efficacy of the fine particles with respect to the base material.

[0037] The fine particle adhesion regions R1 are arranged at intervals in a first direction which is one of the longitudinal direction Y and the transverse direction X. An intermediate region R2 is arranged between the fine particle adhesion regions R1. No fine particles 16 are adhered to the intermediate region R2. In the first embodiment shown in FIG. 1, the first direction is the longitudinal direction Y. Therefore, the fine particle adhesion regions R1 are arranged at intervals in the longitudinal direction Y, and the intermediate region R2 is arranged in the region sandwiched by the fine particle adhesion regions R1 in the longitudinal direction Y. In the fine particle adhesion region R1, the gaps between the fibers 15 of the base sheet 11 are partially blocked by the fine particles 16. Therefore, while the efficacy of the functional agent can be imparted by the fine particles 16, the air permeability of the fine particle adhesion region R1 of the base sheet 11 becomes relatively low. However, since the fine particle adhesion regions R1 are not provided over the entire area of the base sheet 11 and are arranged at intervals in the first direction, air permeability can be ensured in the intermediate region R2 between the fine particle adhesion regions R1. Therefore, the efficacy of the functional agent can be imparted while ensuring the air permeability of the mask body 10.

[0038] The air permeability resistance value of the intermediate region R2 measured by the KES air permeability tester may be lower than that of the particulate adhesion region R1. According to this aspect, air permeability can be ensured in the intermediate region R2 between the particulate adhesion regions R1. Therefore, while ensuring the air permeability of the mask body 10, the efficacy of the functional agent can be imparted. The measurement of the air permeability resistance value can be performed by a well-known method. For example, using a cold spray or the like, the base material sheet 11 is separated from the mask 1, and the particulate adhesion region R1 and the intermediate region R2 of the base material sheet 11 are each cut out to a predetermined size (for example, 50 mm × 50 mm) to obtain samples. Then, using an air permeability tester (KES-F8) manufactured by Kato Tech Co., Ltd. or an equivalent air permeability tester, the standard air permeability rate is set to 2 cm / s, and the air permeability resistance value of the sample is measured. Such measurement can be performed multiple times (for example, 5 times), and the average value can be taken as the air permeability resistance value of each region. In addition, when the sample cannot be cut out to a predetermined size, the air permeability resistance value is measured with the cuttable size, and conversion is performed based on the measured value of the size.

[0039] The rigidity of the particulate adhesion region R1 may be higher than that of the intermediate region R2. According to this configuration, the shape of the particulate adhesion region R1 can be maintained during wearing, and the efficacy of the functional agent can be more effectively imparted. The rigidity can be obtained by a bending rigidity test, that is, after cutting out a test piece of a predetermined size (for example, 50 mm × 10 mm) from the base material sheet 11 to be measured, the bending rigidity in each direction of the test piece (that is, the direction corresponding to the longitudinal direction of the member to be measured) is measured using a pure bending tester KES FB-2 (manufactured by Kato Tech Co., Ltd.).

[0040] The intermediate region R2 may be disposed across the center of the mask body 10 in the first direction. Whether the first direction is the vertical direction Y or the horizontal direction X, the center of the mask body 10 in the first direction is disposed in the vicinity of the lips and nostrils. By disposing the relatively highly breathable intermediate region R2 across the center of the mask body 10 in the first direction, the breathability at the lips and nostrils can be ensured. Thus, breathability can be ensured while imparting the efficacy of the functional agent. Note that the center in the first direction of the first embodiment is the center 10YC in the vertical direction Y. The intermediate region R2 straddles the center 10YC in the vertical direction Y of the mask body 10, and the particulate adhesion region R1 is spaced apart from the center 10YC and is disposed on both sides in the vertical direction Y with respect to the center 10YC.

[0041] The particulate adhesion region R1 may be disposed across the entire area of the base sheet 11 in the second direction, which is the other of the vertical direction Y and the horizontal direction X. According to this aspect, by providing the particulate adhesion regions R1 arranged at intervals in the first direction across the entire area in the second direction, the areas of the region for imparting the efficacy of the functional agent and the region for ensuring breathability can be secured, and it becomes easier to obtain both effects.

[0042] The first direction of the mask of the first embodiment is the vertical direction Y, and the particulate adhesion region R1 is continuous from one outer edge to the other outer edge of the base sheet 11 in the horizontal direction X. The outer edge in the horizontal direction X of the particulate adhesion region R1 and the outer edge in the horizontal direction X of the intermediate region R2 coincide with the outer edge of the mask body 10 in the horizontal direction X. According to this configuration, since the particulate adhesion region R1 is continuous from one outer edge to the other outer edge of the base sheet 11 in the horizontal direction X, the functional agent can be imparted over a wide range in the horizontal direction X that straddles the left and right cheeks, and it becomes easier for the wearer to feel the efficacy of the functional agent.

[0043] The fine particle adhesion region R1 may be arranged at a distance from the outer edge of the base sheet 11 in the vertical direction Y. In the first embodiment, an intermediate region R2 is arranged in a region straddling the center of the mask body 10 in the vertical direction Y, and fine particle adhesion regions R1 are respectively arranged on both sides of the intermediate region R2 in the vertical direction Y. On the outside of each fine particle adhesion region R1 in the vertical direction Y, a non-adhesion region R3 where no fine particles 16 are adhered, similar to the intermediate region R2, is arranged. The fine particle adhesion region R1 is arranged at a distance from the outer edge of the base sheet 11 in the vertical direction Y, and no fine particles are adhered to the outer edge of the base sheet 11 in the vertical direction Y. The rigidity of the outer edge of the mask body 10 is suppressed from increasing and is liable to deform. Therefore, the fit around the nose and jaw where the outer edge of the mask body 10 is applied is improved, air exchange through the mask body 10 is likely to occur, and the functional agent can be effectively taken in.

[0044] The air permeability resistance value of the outer sheet 12 may be higher than the air permeability resistance value of the base sheet 11. According to this aspect, since the air permeability resistance value of the outer sheet 12 located outside the base sheet 11 to which fine particles are attached is high, the fine particles 16 are suppressed from going outside, the fine particles 16 are easily retained inside the mask 1, and the efficacy of the functional agent can be imparted to the wearer. Further, the basis weight of the outer sheet 12 may be higher than the basis weight of the base sheet 11. Since the basis weight of the outer sheet 12 is high, the fine particles are suppressed from going outside, the fine particles are easily retained inside the mask, and the efficacy of the functional agent can be imparted to the wearer.

[0045] The air permeability resistance value of the inner sheet 13 may be higher than the air permeability resistance value of the base sheet 11. According to this aspect, since the air permeability resistance value of the inner sheet located inside the base sheet 11 to which fine particles are attached is high, the fine particles are suppressed from coming out to the skin side, and it is possible to suppress the fine particles from adhering to the skin or entering the mouth or the like. Further, the basis weight of the inner sheet 13 may be higher than the basis weight of the base sheet 11. Since the basis weight of the inner sheet is high, the fine particles 16 are suppressed from coming out to the skin side, and it is possible to suppress the fine particles from adhering to the skin or entering the mouth or the like.

[0046] In the pleat-shaped folded fold portion 18, a fine particle adhesion region R1 and an intermediate region R2 may be arranged. The mask 1 deforms the pleat-shaped fold portion 18 during wearing due to movements such as those of the mouth. The fine particle adhesion region R1 has high rigidity due to the adhesion of the fine particles 16, and the presence of the fine particle adhesion region R1 can increase the rigidity of the fold portion. Therefore, the shape of the fold portion can be maintained, and it becomes easier to secure the space around the mouth. In addition, since the intermediate region R2 is provided in the fold portion 18, air permeability around the mouth can be ensured. Further, when the fine particles 16 are in a form constituted by microcapsules, the microcapsules are easily broken when the fold portion 18 is deformed, and it becomes easier to impart the efficacy of the functional agent during wearing.

[0047] The fine particle adhesion region R1 may be arranged across the fold. Since the fine particle adhesion region R1 straddles the fold, in the region folded by the fold, a plurality of fine particle adhesion regions R1 are laminated. The fine particle adhesion region R1 can be arranged overlapping near the fold that becomes the deformation base point during wearing, and the generation of the functional agent can be further promoted by the deformation during wearing. The length in the vertical direction Y (direction orthogonal to the fold) of the fine particle adhesion region R1 arranged across the fold may be 5 mm or more and 20 mm or less. Since the length in the vertical direction Y of the fine particle adhesion region R1 is 5 mm or more, it is easy to obtain the effect of increasing the rigidity of the fold, and since the length in the vertical direction Y of the fine particle adhesion region R1 is 20 mm or less and is not too long, air permeability can also be ensured.

[0048] The fine particle adhesion region R1 may be disposed across the mountain fold MF and the valley fold VF that are adjacent to each other in the vertical direction Y. The adjacent mountain fold MF and valley fold VF may be, for example, the first fold and the second fold, or the second fold and the third fold, or the third fold and the fourth fold. In the first embodiment, the fine particle adhesion region R1 is disposed across the third fold (mountain fold) and the fourth fold (valley fold). Since the rigidity of each of the adjacent valley fold and mountain fold can be increased, the deformation of the cup portion due to the valley fold and the mountain fold can be maintained. By maintaining the cup shape formed by the valley fold and the mountain fold, a decrease in surface area due to cup collapse can be suppressed, and it becomes easier to secure the space around the mouth.

[0049] In the region between the mountain fold MF and the valley fold VF that are adjacent to each other and across which the fine particle adhesion region R1 is disposed, the fine particle adhesion region R1 may be continuous. However, preferably, as shown in FIG. 6, an intermediate region R2 may be disposed in the region between the mountain fold MF and the valley fold VF that are adjacent to each other and across which the fine particle adhesion region R1 is disposed. According to this aspect, while maintaining the cup shape formed by the valley fold and the mountain fold and suppressing a decrease in surface area due to cup collapse, the air permeability of the cup-shaped portion can be ensured, and the fluidity of exhaled air can be increased.

[0050] (3) Mask according to other embodiments Next, a mask according to another embodiment will be described. In the following description, for the same configurations as those in the above-described embodiment, the description will be omitted using the same reference numerals. Based on FIGS. 3 to 6, masks according to the second to fifth embodiments will be described. The masks according to the second to fifth embodiments may differ from the mask of the first embodiment in the arrangement of the fine particle adhesion region R1 and the intermediate region R2, and the other configurations may be the same.

[0051] FIG. 3 is a view showing the mask 1B according to the second embodiment. FIG. 3(A) is a plan view seen from the outside of the mask 1B, and FIG. 3(B) is a schematic cross-sectional view taken along the line B-B shown in FIG. 3(A). The first direction in the mask 1B according to the second embodiment is the lateral direction X. That is, the fine particle adhesion regions R1 are arranged at intervals in the lateral direction X, and an intermediate region R2 is arranged between the fine particle adhesion regions R1 in the lateral direction X. The first direction is the lateral direction X, and the intermediate region R2 is provided in a certain range extending in the longitudinal direction Y. When the wearer moves the mouth, the mask body 10 is likely to deform in the longitudinal direction Y. At this time, since the intermediate region R2 having relatively high air permeability is provided in a certain range extending in the longitudinal direction Y, even when the mask body 10 deforms due to moving the mouth, the air permeability can be continuously ensured.

[0052] The fine particle adhesion region R1 of the second embodiment is arranged at a distance from the outer edge of the base material sheet 11 in the longitudinal direction Y. A non-adhesion region R3 is arranged between the fine particle adhesion region R1 and the outer edge of the base material sheet 11. According to this configuration, the fine particle adhesion region R1 is arranged at a distance from the outer edge of the base material sheet 11 in the longitudinal direction Y, and no fine particles are adhered to the outer edge of the base material sheet 11 in the longitudinal direction Y. The increase in the rigidity of the outer edge of the mask body 10 is suppressed, and it becomes easier to deform. Therefore, the fit around the nose and jaw where the outer edge of the mask body 10 is applied is improved, the air exchange through the mask body 10 is likely to occur, and the air can be effectively taken into the mask.

[0053] FIG. 4 is a diagram showing the mask 1C according to the third embodiment. FIG. 4(A) is a plan view seen from the outside of the mask 1C, and FIG. 4(B) is a schematic cross-sectional view taken along the line C-C shown in FIG. 4(A). The first direction in the mask 1C according to the third embodiment is the horizontal direction X. The fine particle adhesion regions R1 are arranged at intervals in the horizontal direction X, and an intermediate region R2 is arranged between the fine particle adhesion regions R1 in the horizontal direction X. Further, the intermediate regions R2 are arranged at intervals in the horizontal direction X, and fine particle adhesion regions R1 are arranged between the intermediate regions R2. The fine particle adhesion region R1 of the third embodiment is arranged across the center 10XC in the horizontal direction X of the mask body 10. The central portion of the mask body 10 in the horizontal direction X is a region that easily adheres to the cheeks and nose. By providing the fine particle adhesion region R1 in this region, it is easier to impart the efficacy of the functional agent to the wearer.

[0054] The intermediate region R2 of the third embodiment is arranged on both sides of the mask body 10 with respect to the center in the first direction. By providing the intermediate regions R2 on both sides of the mask body 10 with respect to the center in the first direction, which is arranged near the lips and nostrils, the lips and nostrils can be sandwiched by regions with high air permeability, and shortness of breath can be suppressed.

[0055] FIG. 5 is a diagram showing the mask 1D according to the fourth embodiment. FIG. 5(A) is a plan view seen from the outside of the mask 1D, and FIG. 5(B) is a schematic cross-sectional view taken along the line D-D shown in FIG. 5(A). FIG. 6 is a diagram showing the mask 1E according to the fifth embodiment. FIG. 6(A) is a plan view seen from the outside of the mask 1E, and FIG. 6(B) is a schematic cross-sectional view taken along the line E-E shown in FIG. 6(A). The first direction in the mask 1D according to the fourth embodiment and the mask 1E according to the fifth embodiment is the vertical direction Y. The intermediate regions R2 are arranged on both sides of the mask body 10 with respect to the center in the first direction. According to this configuration, air permeability for the mouth can be ensured in the intermediate region R2 arranged below the center 10YC in the vertical direction Y of the mask body 10, and air permeability for the nose can be ensured in the intermediate region R2 arranged above the center 10YC.

[0056] The area of the intermediate region R2 located above the center of the mask body 10 in the vertical direction Y may be the same as the area of the intermediate region R2 located below the center of the mask body 10 in the vertical direction Y. According to this aspect, since the areas of the upper and lower intermediate regions R2 with respect to the center 10YC of the mask body 10 in the vertical direction Y are equal, air can be effectively introduced. Therefore, regardless of whether it is nasal breathing or mouth breathing, the circulation of air is not hindered, and the functional agent can be effectively incorporated. In a modified example, the area of the intermediate region R2 located above the center of the mask body 10 in the first direction may be larger than the area of the intermediate region R2 located below the center of the mask body 10 in the first direction. According to this aspect, the air permeability to the nostrils can be further increased. In another modified example, the area of the intermediate region located below the center of the mask body 10 in the first direction may be larger than the area of the intermediate region located above the center of the mask body 10 in the first direction. According to this aspect, the air permeability to the lips can be further increased.

[0057] In the fourth embodiment, the particulate adhesion region R1 is provided in each of the adjacent mountain folds MF and valley folds VF, and is also continuously provided between the adjacent mountain folds MF and valley folds VF arranged adjacent to each other. Therefore, the area of the particulate adhesion region R1 is ensured, and it becomes easier to impart the efficacy of the functional agent. In contrast, in the fifth embodiment, the particulate adhesion region R1 is provided in each of the adjacent mountain folds and valley folds, and an intermediate region R2 is arranged between the adjacent mountain folds MF and valley folds VF arranged adjacent to each other. According to this configuration, while maintaining the cup shape formed by the valley folds and mountain folds and suppressing a decrease in the surface area due to cup collapse, the air permeability of the cup-shaped portion can be ensured, and the flowability of exhaled air can be increased.

[0058] FIG. 7 is a diagram showing a mask 1F according to the sixth embodiment. FIG. 7(A) is a plan view seen from the outside of the mask 1F, and FIG. 7(B) is a schematic cross-sectional view taken along the line F-F shown in FIG. 7(A). The pleat portions shown in FIG. 1 and the like are folded in a mountain fold on the outside in the vertical direction Y with the center in the vertical direction Y of the mask body 10 interposed therebetween, and are deformed into an omega shape when worn. On the other hand, the mask shown in FIG. 7 has a pleated pleat portion folded in a mountain fold downward, and forms a cup shape that spreads downward. In the mask body 10, from the outside to the inside in the thickness direction Z, a first fold line F1 which is a valley fold line VF, a second fold line F2 which is a mountain fold line MF, a third fold line F3 which is a valley fold line VF, a fourth fold line F4 which is a mountain fold line MF, a fifth fold line F5 which is a mountain fold line MF, a sixth fold line F6 which is a valley fold line VF, a seventh fold line F7 which is a mountain fold line MF, and an eighth fold line F8 which is a valley fold line VF are formed. The fine particle adhesion region R1 is arranged across each fold line.

[0059] Next, based on FIG. 8, the mask 1G according to the seventh embodiment will be described. The mask body 10 is folded at the center in the horizontal direction X and unfolds in the horizontal direction X when worn. The mask body 10 is folded based on a central fold line 32 extending in the vertical direction Y at the center in the horizontal direction X of the mask body 10 before use. The central fold line 32 may be a fold line where the sheets constituting the mask body 10 are folded, or a joint portion where the sheets constituting the mask body 10 are joined. The central fold line 32 may be provided continuously in the vertical direction Y of the mask body 10. The central fold line 32 may be curved in the vertical direction Y in the folded state shown in FIG. 1. More specifically, the central fold line bulges outward in the horizontal direction X from the upper end of the central fold line downward, and bulges outward in the horizontal direction X from the lower end of the central fold line 32 upward. In the folded state shown in FIG. 8, the center in the vertical direction Y of the central fold line 32 protrudes outward in the horizontal direction X more than the end in the vertical direction Y of the central fold line 32, and has a substantially curved shape convex toward the horizontal direction X. Therefore, the mask body 10 can form a three-dimensional shape (three-dimensional structure) that is concave with respect to the wearer's face in the state where the folded mask body is unfolded.

[0060] The mask 1G has a pair of ear-hanging portions 20 joined to both side portions in the horizontal direction X of the mask body 10, respectively. The ear-hanging portion 20 extends outward in the horizontal direction X from the edge on the opposite side of the central fold line 32 among the edges in the horizontal direction X of the mask body 10. The fine particle adhesion region R1 is disposed in a region extending inward in the horizontal direction X from the edge on the opposite side of the central fold line 32. The fine particle adhesion region R1 is disposed on both sides sandwiching the central fold line 32, and an intermediate region R2 is disposed in the region sandwiched by the fine particle adhesion region R1. The intermediate region R2 is disposed across the central fold line 32.

[0061] According to this configuration, the central fold line 32 is located at the apex of the cup shape when the mask is worn, and is arranged to face the mouth and nose. By arranging the relatively highly breathable intermediate region R2 across the central fold line 32, the breathability at the mouth and nose can be ensured. Therefore, while ensuring breathability, the efficacy of the functional agent can be imparted. Further, the region extending inward in the lateral direction X from the edge on the side opposite to the central fold line 32 is a region that is pulled outward in the lateral direction X by the ear loops 20 and is likely to adhere to the cheeks. By arranging the fine particle adhesion region R1 in this region, the efficacy of the functional agent can be efficiently imparted to the wearer.

[0062] In the folded state of the mask body 10, the length of the intermediate region R2 in the lateral direction X may be 1 / 3 or less of the length a of the central fold line 32 in the longitudinal direction Y. The length of the intermediate region R2 in the lateral direction X in the folded state is the length along the lateral direction X between the apex that bulges outward in the lateral direction X of the central fold line 32 and the edge on the central fold line 32 side of the fine particle adhesion region R1. Generally, the lips and nostrils of the wearer are arranged within a distance of 1 / 3 of a from the central fold line 32 toward the outside in the lateral direction X when the distance in the longitudinal direction Y of the intermediate region R2 is a. By arranging the intermediate region R2 in this region, the breathability near the nose and mouth where there is a large inflow of exhaled air can be further improved. Also, the efficacy of the functional agent can be imparted in the region where the lips and nostrils are not arranged.

[0063] As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modified and changed forms without departing from the spirit and scope of the present invention as defined by the description of the claims. Therefore, the description in this specification is for the purpose of illustrative explanation and has no restrictive meaning for the present invention.

Explanation of Reference Numerals

[0064] 1, 1B, 1C, 1D, 1E, 1F, 1G: Mask 10: Mask body 11: Base sheet 12: Outer sheet 13: Inner sheet 15: Fiber 16: Fine particle 18: Pleat part 20: Ear-hanging part 32: Central fold MF: Mountain fold VF: Valley fold R1: Fine particle adhesion region R2: Intermediate region X: Horizontal direction Y: Vertical direction Z: Thickness direction Z1: Inner side Z2: Outer side

Claims

1. a longitudinal direction corresponding to the vertical direction of the wearer, a lateral direction corresponding to the left-right direction of the wearer, and a mask body covering at least the lips and nostrils of the wearer, the mask comprising: the mask body having a breathable base sheet made of a fibrous material, the base sheet having a particulate adhesion region to which fine particles containing a functional agent are adhered, the particulate adhesion regions being spaced apart from each other in a first direction which is one of the longitudinal direction and the lateral direction, the mask.

2. The ventilation resistance value of the intermediate region disposed between the particulate adhesion regions in the base sheet as measured by a KES air permeability tester is lower than the ventilation resistance value of the particulate adhesion regions, the mask according to claim 1.

3. The fine particles are microcapsules encapsulating the functional agent, the mask according to claim 1.

4. The intermediate region disposed between the particulate adhesion regions in the base sheet may be disposed across the center of the mask body in the first direction, the mask according to any one of claims 1 to 3.

5. The particulate adhesion regions are disposed across the entire area of the base sheet in a second direction which is the other of the longitudinal direction and the lateral direction, the mask according to any one of claims 1 to 3.

6. The first direction is the lateral direction, and the particulate adhesion regions are disposed spaced apart from the outer edge of the base sheet in the longitudinal direction, the mask according to any one of claims 1 to 3.

7. The first direction is the longitudinal direction, and the particulate adhesion regions are continuous from one outer edge to the other outer edge of the base sheet in the lateral direction, the mask according to claim 3.

8. The intermediate region disposed between the particulate adhesion regions in the base sheet is disposed on both sides with respect to the center of the mask body in the first direction, the mask according to any one of claims 1 to 3.

9. The first direction is the longitudinal direction, and the area of the intermediate region located above the center of the mask body in the first direction is larger than the area of the intermediate region located below the center of the mask body in the first direction, the mask according to claim 8.

10. The first direction is the longitudinal direction, The area of the intermediate region located below the center of the mask body in the first direction is larger than the area of the intermediate region located above the center of the mask body in the first direction. The mask according to claim 8.

11. The mask body is disposed outside the base material sheet and has a breathable outer sheet made of a fiber material. The air permeability resistance value of the outer sheet measured by a KES air permeability tester is higher than the air permeability resistance value of the base material sheet. The mask according to any one of claims 1 to 3.

12. The mask body is disposed inside the base material sheet and has a breathable inner sheet made of a fiber material. The air permeability resistance value of the inner sheet measured by a KES air permeability tester is higher than the air permeability resistance value of the base material sheet. The mask according to any one of claims 1 to 3.

13. The mask body is folded into a pleated shape by a mountain fold line that folds the mask body into a mountain fold shape protruding outward in the longitudinal direction and a valley fold line that folds the mask body into a valley fold shape protruding inward in the longitudinal direction. In the pleated fold portion, a fine particle adhesion region and an intermediate region disposed between the fine particle adhesion regions in the base material sheet are arranged. The mask according to any one of claims 1 to 3.

14. The fine particle adhesion region straddles each of the mountain fold line and the valley fold line disposed adjacent to each other in the longitudinal direction. The mask according to claim 13.

15. The intermediate region is disposed between the mountain fold line and the valley fold line. The mask according to claim 14.

16. The mask body has a pair of ear-hanging portions joined to both side portions in the lateral direction of the mask body. The mask body is folded with a central fold line extending in the longitudinal direction at the center in the lateral direction of the mask body before use as a reference point. The ear-hanging portion extends outward in the lateral direction from an edge on the opposite side of the central fold line among the lateral edges of the mask body. In a state where the mask body is folded, the central fold line bulges outward in the lateral direction from the upper end of the central fold line downward and bulges outward in the lateral direction from the lower end of the central fold line upward and is curved. The fine particle adhesion region is disposed in a region extending inward in the lateral direction from an edge on the side opposite to the central fold line. The intermediate region disposed between the fine particle adhesion regions is disposed across the central fold line. The mask according to any one of claims 1 to 3.

17. In the folded state of the mask body, the lateral length of the intermediate region is 1 / 3 or less of the longitudinal length a of the central fold line. The mask according to claim 16.

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