CN218960120U - Disposable mask - Google Patents

Abstract

The utility model provides a disposable mask, which has a plurality of folds and can be adjusted so that no gap is generated between the middle area of the transverse end part of the mask body and the surface of the face, and no gap is generated between the lower end part and the surface of the face. The disposable mask (1) is provided with a mask body (3) composed of sheets and a pair of ear hanging parts (5) extending from two lateral side edges of the mask body. The mask body is provided with: a plurality of pleats (11) formed by a part of the folded sheet, extending in the lateral direction, and arranged at intervals in the up-down direction; and a plurality of connecting portions (12) formed by a part of the unfolded sheet and positioned between the pleats adjacent in the up-down direction among the plurality of pleats. The plurality of pleats has a joint portion (20) at each of both end portions in the lateral direction, respectively, and the joint portion (20) fixes the respective sheets of the plurality of pleats to each other.

Description

Disposable mask

Technical Field

The present utility model relates to disposable masks.

Background

There is known a disposable mask including a mask body and a pair of ear-hanging portions, the mask body having a plurality of pleats (folds) extending in a lateral direction and arranged at intervals in a vertical direction. In this disposable mask, when worn, the lateral central portions of the plurality of fold portions are expanded in the up-down direction, thereby forming a three-dimensional shape (cup) on the mask body. As such a mask, for example, patent document 1 discloses a disposable mask having a vertical direction and a width direction, and including: a transverse center line bisecting the dimension in the up-down direction; a mask body; and a pair of ear hanging parts extending annularly from two side edges of the mask body. In this disposable mask, the mask body is formed of a sheet made of nonwoven fabric, and includes: disposing upper and lower end portions of the base end portions of the pair of ear hanging portions; a mouth covering portion located between the upper and lower end portions; and a sealing region in which a plurality of joint portions are arranged, the sealing region extending intermittently in the vertical direction along both side edges. The mouth covering portion has a fold portion constituted by an overlapped portion formed by folding the sheet, and a non-overlapped portion located between the fold portions in the up-down direction. The non-overlapping portion has a non-sealing region located below the cross-sectional centerline. In the pleat portion located at the lower side of the non-overlapping portion, there is a wide-width joint portion formed by arranging a plurality of joint portions in the width direction.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2017-14673

In the mask disclosed in patent document 1, one end and the other end of the pair of ear-hanging portions are connected to upper and lower end portions of one end in the vertical direction of the mask body. When the mask is worn, the upper end and the lower end of the lateral end of the mask body are lifted up in the direction of the ears by hanging the ear hanging parts on the ears, and the lateral end of the mask body is pressed against the face surface. This suppresses occurrence of a gap between the lateral end of the mask body and the face surface.

However, when the face is a person having a long face and relatively low ear positions (near the jaw) and forward (near the nose), it is difficult to lift the lower end of the lateral end of the mask body toward the ears by the ear-hanging portion. As a result, a gap may be generated between the lower end of the lateral end of the mask body and the face surface.

In patent document 1, when wearing the mask, a part of a non-overlapping portion provided at a substantially central portion in the vertical direction is bent so as to be folded in the front-rear direction, and a lower portion extending downward from the non-overlapping portion moves rearward along the surface of the face of the wearer. This suppresses the occurrence of a gap between the two ends of the mask body in the width direction and the face surface. However, when the wearer's face has the above-described features, there is still a possibility that a gap may be generated between the lower end of the lateral end of the mask body and the face surface by the method of patent document 1 alone.

However, if the lower end portion of the lateral end portion of the mask body is pulled up in the direction of the ear only by designing the ear hanging portion, there is a possibility that a gap is generated between the mask body and the cheek, that is, between the intermediate region between the upper end portion and the lower end portion of the lateral end portion of the mask body and the surface of the face (cheek).

Disclosure of Invention

The utility model aims to provide a disposable mask which is provided with a plurality of folds and can be adjusted so that a gap is not generated between the middle area of the transverse end part of the mask body and the surface of the face and a gap is not generated between the lower end part of the transverse end part of the mask body and the surface of the face.

Means for solving the problems

The disposable mask of the present utility model has an up-down direction, a transverse direction and a thickness direction, and comprises: a mask body composed of sheets; and a pair of ear hanging parts extending from both lateral side edges of the mask body, wherein the mask body includes: a plurality of pleats formed by a part of the folded sheet, extending in the lateral direction, and arranged at intervals in the up-down direction; and a plurality of coupling portions formed of a part of the sheet that is not folded, located between the pleats adjacent in the up-down direction among the plurality of pleats, the plurality of pleats each having a joint portion at each of the lateral both end portions, the joint portions fixing the sheets of the plurality of pleats each to each other.

Preferably, the engagement portion includes an inclined direction engagement portion that extends continuously or intermittently in a direction inclined with respect to the lateral direction and the up-down direction.

Preferably, the oblique direction joint portion extends continuously or intermittently in an oblique direction oblique to the lateral direction so as to extend from a top side of the pleat toward a valley side as it extends outward in the lateral direction.

Preferably, the joining portion further includes a first lateral joining portion which is disposed at or near an end of the oblique joining portion on the valley side of the pleat, and which extends continuously or intermittently in the lateral direction.

Preferably, the joining portion further includes a second lateral joining portion which is disposed at or near an end of the oblique joining portion on the top side of the fold portion and extends continuously or intermittently in the lateral direction.

Preferably, the length of the joint in the up-down direction is 70% to 90% of the length of each of the plurality of pleats in the up-down direction.

Preferably, the end portion of the joint portion in the up-down direction is separated from at least one of the top portion of the pleat portion and the valley portion of the pleat portion in a plan view.

Preferably, for each of the plurality of connecting portions, a width of a lowermost connecting portion in the up-down direction is larger than that of the other connecting portions.

Preferably, the width of each of the plurality of connecting portions in the up-down direction increases as going from the upper side to the lower side in the up-down direction.

Preferably, the joint is formed by embossing.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present utility model, it is possible to provide a disposable mask having a plurality of pleats, which can be adjusted so that a gap is not generated between the face surface and the lower end portion of the lateral end portion of the mask body while a gap is not generated between the face surface and the middle region of the lateral end portion of the mask body.

Drawings

Fig. 1 is a plan view showing a configuration example of a disposable mask according to an embodiment.

Fig. 2 is a cross-sectional view taken along the vertical center line of the disposable mask of fig. 1.

Fig. 3 is an enlarged partial view (cross-sectional view) of the pleat and the joint of fig. 2.

Fig. 4 is a plan view showing an example of the structure of the joint portion of the disposable mask according to the embodiment.

Fig. 5 is a partial plan view showing a configuration example of the disposable mask according to the embodiment.

Fig. 6 is a perspective view showing an example of wearing the disposable mask according to the embodiment.

Fig. 7 is a partial enlarged view (perspective view) showing a lateral end portion of the disposable mask of fig. 6.

Fig. 8 is an enlarged view (cross-sectional view) of a portion of a disposable mask according to another embodiment along a vertical center line.

Description of the reference numerals

1 (disposable) mask; 3, a mask body; 5 ear hanging parts; 11 pleats; 12 connecting parts; 20 joints.

Detailed Description

The present embodiment relates to the following modes.

Mode 1

A disposable mask having an up-down direction, a lateral direction and a thickness direction, comprising: a mask body composed of sheets; and a pair of ear hanging parts extending from both lateral side edges of the mask body, wherein the mask body includes: a plurality of pleats formed by a part of the folded sheet, extending in the lateral direction, and arranged at intervals in the up-down direction; and a plurality of coupling portions formed of a part of the sheet that is not folded, located between the pleats adjacent in the up-down direction among the plurality of pleats, the plurality of pleats each having a joint portion at each of the lateral both end portions, the joint portions fixing the sheets of the plurality of pleats each to each other.

When a mask having a plurality of pleats (folds) is worn, the lateral center portions of the plurality of pleats are expanded in the vertical direction, and when the mask body is formed into a three-dimensional shape, the lateral end portions of the plurality of pleats move so as to approach each other. Therefore, in the disposable mask, the connecting portion is provided between the vertically adjacent pleat portions. Since the connecting portion is formed of a part of the unfolded sheet, the connecting portion has lower rigidity than the fold portion and is easily bent. Therefore, when the mask body is formed into a three-dimensional shape, the plurality of connection portions having low rigidity can be bent and folded to adjacent fold portions. Thus, the lateral end portions of the plurality of fold portions can be brought close to each other, and a part of them can be overlapped with the curved connecting portion, so that the entire lateral end portion of the mask body can be easily deformed into a shape curved along the surface of the face of the wearer. Therefore, the gap between the middle region and the face surface can be kept free from occurring at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed from occurring.

Mode 2

The disposable mask according to claim 1, wherein the joint portion includes an inclined joint portion that extends continuously or intermittently in a direction inclined with respect to the lateral direction and the up-down direction.

The disposable mask has the structure. Therefore, when the mask is worn, the plurality of connection portions can be bent and folded to the adjacent pleat portions by extending the lateral center portions of the plurality of pleat portions in the vertical direction, bringing the lateral end portions close to each other, and the direction in which the plurality of connection portions are bent and the direction in which the plurality of pleat portions are extended can be guided to an appropriate direction by the oblique direction joint portion. Thus, the lateral end portion of the mask body can take a shape curved along the face surface. Therefore, since the three-dimensional shape of the mask body can be easily formed and maintained, the gap between the intermediate region and the face surface can be maintained at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed.

Mode 3

The disposable mask according to claim 2, wherein the oblique direction joint portion extends continuously or intermittently in an oblique direction oblique to the lateral direction so as to extend from a top side of the fold portion toward a valley side as going outward in the lateral direction.

The disposable mask has the structure. In other words, the oblique direction joint portion is provided to extend in an oblique direction, which is a direction approaching from the valley side to the top side of the pleat toward the lateral center portion, that is, a direction oblique toward the extension of the pleat. Therefore, when the mask is worn, the lateral center portions of the plurality of fold portions are expanded in the up-down direction, the lateral end portions are brought close to each other, and the plurality of connection portions are bent and folded to the adjacent fold portions, the bending direction of the plurality of connection portions can be guided to an appropriate direction by the inclined direction joint portion. In this way, the direction in which the plurality of folds are expanded can be guided to an appropriate direction, and the three-dimensional shape formed in the lateral center portion of the mask body can be maintained, and the lateral end portions of the mask body can take a shape curved along the surface of the face. Therefore, since the three-dimensional shape of the mask body can be easily maintained, the gap between the intermediate region and the face surface can be maintained at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed.

Mode 4

The disposable mask according to claim 3, wherein the joint portion further includes a first lateral joint portion which is disposed at or near an end of the fold portion of the oblique joint portion on the valley side and extends continuously or intermittently in the lateral direction.

The disposable mask has the structure. Therefore, rigidity and shape stability at the lateral ends of the plurality of pleats can be improved. Therefore, when the mask is worn, the plurality of connection portions are bent and folded to the adjacent pleat portions while the lateral center portions of the plurality of pleat portions are expanded in the vertical direction and the lateral end portions are brought close to each other, and the bending of the lateral end portions of the plurality of pleat portions can be suppressed by the first lateral joint portions. Thus, the lateral end of the mask body can maintain a curved shape along the face surface. Therefore, since the three-dimensional shape of the mask body can be easily maintained, the gap between the intermediate region and the face surface can be maintained at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed.

Mode 5

The disposable mask according to claim 3 or 4, wherein the joint portion further includes a second lateral joint portion which is disposed at or near an end portion of the oblique joint portion on the top side of the fold portion and extends continuously or intermittently in the lateral direction.

The disposable mask has the structure. Therefore, rigidity and shape stability at the lateral ends of the plurality of pleats can be improved. Therefore, when the mask is worn, the plurality of connection portions are bent and folded to the adjacent pleat portions while the lateral center portions of the plurality of pleat portions are expanded in the vertical direction and the lateral end portions are brought close to each other, and the lateral end portions of the plurality of pleat portions can be restrained from floating upward in the thickness direction by the second lateral joint portions. Thus, the lateral end of the mask body can maintain a curved shape along the face surface. Therefore, since the three-dimensional shape of the mask body can be easily maintained, the gap between the intermediate region and the face surface can be maintained at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed.

Mode 6

The disposable mask according to any one of claims 2 to 5, wherein a length of the joint portion in the up-down direction is 70% to 90% of a length of each of the plurality of pleats in the up-down direction.

The disposable mask has the structure. Therefore, when the mask is worn, the bending direction of the plurality of connecting portions and the direction in which the plurality of fold portions extend can be guided to appropriate directions by the joint portions, and the degree of freedom in deformation of the adjacent connecting portions can be increased. Thus, the shape in which the lateral end of the mask body is curved along the face surface can be easily obtained. Therefore, the gap between the middle region and the face surface can be kept free from occurring at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed from occurring.

Mode 7

The disposable mask according to any one of claims 2 to 6, wherein an end portion of the joint portion in the up-down direction is separated from at least one of a top portion of the fold portion and a valley portion of the fold portion in a plan view.

The disposable mask has the structure. Therefore, when the mask is worn, the region that is bent together with the connecting portion can be enlarged in the fold portion. This can guide the bending direction of the plurality of connecting portions and the expanding direction of the plurality of pleats to appropriate directions, and can further improve the degree of freedom in deformation of the adjacent connecting portions. Thus, the shape in which the lateral end of the mask body is curved along the face surface can be easily obtained. Therefore, the gap between the middle region and the face surface can be kept free from occurring at the lateral end portion of the mask body, and the gap between the lower end portion and the face surface can be suppressed from occurring.

Mode 8

The disposable mask according to any one of claims 1 to 7, wherein, for each of the plurality of connection portions, a lowermost connection portion in the up-down direction has a width in the up-down direction larger than that of the other connection portions.

The disposable mask has the structure. Therefore, when the plurality of connection portions are bent and folded to the adjacent fold portions, the lower end portion of the lateral end portion of the mask body can be made to have a more curved shape. Therefore, the lateral end portion of the mask body can entirely take a shape curved along the surface of the face of the wearer. Thus, the gap between the middle region and the face surface can be kept free from occurring at the lateral end of the mask body, and the gap between the lower end and the face surface can be suppressed.

Mode 9

The disposable mask according to claim 8, wherein the width of each of the plurality of connection portions in the up-down direction increases as going from the upper side to the lower side in the up-down direction.

The disposable mask has the structure. Therefore, when the plurality of connection portions are bent and folded to the adjacent fold portions, the region in the center of the lateral end portion of the mask body can be further bent, and the lower end portion can be further bent. Therefore, the lateral end portion of the mask body can entirely take a shape curved along the surface of the face of the wearer. Thus, the gap between the middle region and the face surface can be kept free from occurring at the lateral end of the mask body, and the gap between the lower end and the face surface can be suppressed.

Mode 10

The disposable mask according to any one of claims 1 to 9, wherein the joint portion is formed by embossing.

The disposable mask has the structure. Therefore, the joint is less likely to fall off, and the shape of the lateral end of the mask body can be stably maintained. Thus, the gap between the middle region and the face surface can be kept free from occurring at the lateral end of the mask body, and the gap between the lower end and the face surface can be suppressed.

Hereinafter, a disposable mask according to an embodiment will be described with reference to the drawings.

Fig. 1 to 2 are views showing a configuration example of a disposable mask 1 (hereinafter, also simply referred to as "mask 1") according to an embodiment. Fig. 1 is a plan view showing an exemplary configuration of the mask 1, and fig. 2 is a cross-sectional view taken along the vertical center line CV in fig. 1.

The mask 1 has a vertical direction V, a lateral direction H, and a thickness direction T, which are orthogonal to each other, and includes a mask body 3 and a pair of ear-hanging portions 5 extending from both side edges of the mask body 3 in the lateral direction H. The mask 1 has a vertical center line CV extending in the vertical direction V through the center of the mask body 3 in the lateral direction H, and a lateral center line CH extending in the lateral direction H through the center of the mask body 3 in the vertical direction V. The direction and the side facing the center line CV in the up-down direction are referred to as "inward" and "inward" of the lateral direction H, respectively, and the direction and the side facing away from each other are referred to as "outward" and "outward" of the lateral direction H, respectively. On the other hand, the direction toward the lateral center line CH and the side thereof are also referred to as "inward" and "inward" of the up-down direction V, respectively, and the direction away from and the side thereof are also referred to as "outward" and "outward" of the up-down direction V, respectively. The side of the mask 1 that is relatively close to the skin surface of the wearer and the side that is far from the skin surface in the thickness direction T of the mask 1 when the mask 1 is worn are referred to as "skin side" and "non-skin side", respectively. The mask 1 is referred to as "planar" when viewed from above (on the non-skin side) in the thickness direction T, the shape grasped in the planar view is referred to as "planar shape", and any direction in the plane including the up-down direction V and the lateral direction H is referred to as "in-plane direction". The term "along" the vertical direction V or the lateral direction H means a direction including a range of ±30° (preferably 15 °) with respect to the vertical direction V or the lateral direction H. The "end portion" of a certain member or the like in a certain direction (for example, the vertical direction V and the lateral direction H) means a range of a dimension of 1/8 (preferably 1/10) of the entire length of the member or the like in the direction from an end edge of the member or the like in the direction. For example, the end (lateral end) of the mask body 3 in the lateral direction H is a range from the end edge of the mask body 3 in the lateral direction H to 1/8 (preferably 1/10) of the width of the maximum length of the mask body 3 in the lateral direction H. The upper side (nose attaching side)/lower side of the mask body is referred to as "upper side/lower side in the up-down direction V".

The mask body 3 is formed of a sheet 30. In the present embodiment, the shape of the rectangular plate is a substantially rectangular plate (rounded corners) which is line-symmetrical with respect to the vertical center line CV, short in the vertical direction V, and long in the lateral direction H in a plan view. However, the shape of the mask body 3 is not limited to this example as long as it can cover the nose and mouth, and examples thereof include a substantially rectangular shape having a semicircular arc shape as a short side, a substantially elliptical shape, a substantially inverted triangle shape, a substantially polygonal shape, and combinations thereof.

The mask body 3 has a plurality of pleats 11, and the plurality of pleats 11 extend in the lateral direction H and are arranged at intervals in the vertical direction V. Therefore, the mask body 3 has a pleated structure in which a plurality of pleats 11 are arranged. In the present embodiment, the plurality of pleats 11 include pleats 11a, 11b located above the vertical direction V and facing the upper side of the vertical direction V, and pleats 11c, 11d located below the vertical direction V and facing the lower side of the vertical direction V. Therefore, the mask body 3 has an Ω -shaped structure having a substantially "Ω" shape when viewed in the lateral direction H. Thus, when the mask 1 is worn, the central portions of the upward-facing pleats 11a, 11b and the downward-facing pleats 11c, 11d in the lateral direction H can expand in the vertical direction V, and deform in a serpentine shape to form a three-dimensional shape (cup) between the mask body 3 and the wearer. However, the plurality of pleats 11 are each formed in a state where a part of the sheet 30 is folded.

The mask body 3 includes a plurality of connection portions 12, and the plurality of connection portions 12 are located between the adjacent pleats 11 in the up-down direction V among the plurality of pleats 11. The plurality of connecting portions 12 extend in the lateral direction H, and are arranged at intervals in the vertical direction V. In the present embodiment, the plurality of connection portions 12 include connection portions 12a between the adjacent pleat 11a and pleat 11b, connection portions 12b between the adjacent pleat 11b and pleat 11c, and connection portions 12c between the adjacent pleat 11c and pleat 11 d. However, the plurality of connecting portions 12 are formed in a state in which a part of the sheet 30 is unfolded. Therefore, the sheet 30 has lower rigidity than the folded-over joint portion 12 of the sheet 30, and is likely to be deformed such as bent.

Fig. 3 is a partially enlarged view (cross-sectional view) of the pleat 11 and the joint 12 of fig. 2. In the present embodiment, the pleat 11 has the following structure in detail. The fold 11a includes a base 31a on the skin side in the thickness direction T and folds 32a on the non-skin side in the thickness direction T. The fold 32a includes a first portion 33a on the skin side in the thickness direction T and a second portion 34a on the non-skin side in the thickness direction T. In the pleat 11a, the lower end of the base material 31a in the up-down direction V is connected to the lower end of the first portion 33a in the up-down direction V at the valley Va, and the upper end of the first portion 33a in the up-down direction V is connected to the upper end of the second portion 34a in the up-down direction V at the top Ta.

Similarly, the fold 11b includes a base 31b on the skin side in the thickness direction T and folds 32b on the non-skin side in the thickness direction T. The fold 32b includes a first portion 33b on the skin side in the thickness direction T and a second portion 34b on the non-skin side in the thickness direction T. In the pleat 11b, the lower end of the base material 31b in the up-down direction V is connected to the lower end of the first portion 33b in the up-down direction V at the valley Vb, and the upper end of the first portion 33b in the up-down direction V is connected to the upper end of the second portion 34b in the up-down direction V at the top Tb.

Similarly, the fold 11c includes a base 31c on the skin side in the thickness direction T and folds 32c on the non-skin side in the thickness direction T. The fold 32c includes a first portion 33c on the skin side in the thickness direction T and a second portion 34c on the non-skin side in the thickness direction T. In the pleat 11c, an upper end of the base material 31c in the up-down direction V is connected to an upper end of the first portion 33c in the up-down direction V at a valley Vc, and a lower end of the first portion 33c in the up-down direction V is connected to a lower end of the second portion 34c in the up-down direction V at a top Tc.

Similarly, the fold 11d includes a base 31d on the skin side in the thickness direction T and folds 32d on the non-skin side in the thickness direction T. The fold 32d includes a first portion 33d on the skin side in the thickness direction T and a second portion 34d on the non-skin side in the thickness direction T. In the pleat 11d, an upper end of the base material 31d in the up-down direction V is connected to an upper end of the first portion 33d in the up-down direction V at the valley Vd, and a lower end of the first portion 33d in the up-down direction V is connected to a lower end of the second portion 34d in the up-down direction V at the top Td.

In the present embodiment, the widths D11a, D11b, D11c, D11D of the pleats 11a, 11b and the pleats 11c, 11D in the vertical direction V are the same length. However, the relation between these widths is not particularly limited, and at least one may be different from the others.

On the other hand, in the present embodiment, the connecting portion 12 has the following structure in detail. The connecting portion 12a connects an upper end portion in the up-down direction V with a lower end portion in the up-down direction V of the second portion 34a of the pleat 11a, and connects a lower end portion with an upper end portion in the up-down direction V of the base material 31b of the pleat 11 b.

Similarly, the connecting portion 12b connects an upper end portion in the up-down direction V with a lower end portion in the up-down direction V of the second portion 34b of the fold portion 11b, and connects a lower end portion with an upper end portion in the up-down direction V of the second portion 34c of the fold portion 11 c.

Similarly, the connecting portion 12c connects the upper end portion in the up-down direction V with the lower end portion in the up-down direction V of the base material 31c of the pleated portion 11c, and connects the lower end portion of the connecting portion 12c with the upper end portion in the up-down direction V of the second portion 34d of the pleated portion 11 d.

The plurality of connecting portions 12 are preferably each formed such that the width of the connecting portion 12 located opposite to the lower side is the same as the width of the connecting portion 12 located opposite to the upper side or the width of the connecting portion 12 located opposite to the lower side is larger than the width of the connecting portion 12 located opposite to the upper side in the vertical direction V. That is, the widths d12a, d12b, d12c of the connecting portions 12a, 12b, 12c in the vertical direction V are d12 a-d 12 b-d 12c. More preferably, at least the lowermost connecting portion 12 has a width larger than the width of the other connecting portions 12. That is, d12a.ltoreq.d12b < d12c. In the present embodiment, more preferably, the width of the connecting portion 12 increases as going from the upper side to the lower side in the vertical direction V. Namely, d12a < d12b < d12c. Specifically, for example, d12a, d12b, d12c=2mm, 3mm, and 4mm are mentioned. However, if at least d12c is 2mm or more, d12a and d12b may be 0mm or less. Therefore, as will be described later, the mask body 3 is more easily expanded downward in the vertical direction V when the mask is worn. However, the relationship of these widths is not particularly limited.

As shown in fig. 1, each of the plurality of pleats 11 has a joint 20 at each of both end portions in the lateral direction H, and the joint 20 fixes the sheets 30 of each of the plurality of pleats 11 to each other. The joint 20 is formed by, for example, embossing, thermal welding using ultrasonic waves or the like, bonding using an adhesive, or the like. In the present embodiment, the joint portion 20 includes joint portions 20a, 20b, 20c, and 20d, and the joint portions 20a, 20b, 20c, and 20d are provided at both ends in the lateral direction H of the pleat portions 11a, 11b, and the pleat portions 11c, 11d, respectively. The joining portion 20a joins the base material 31a, the first portion 33a, and the second portion 34a of the pleat 11a to each other in the thickness direction T. The joining portion 20b joins the base material 31b, the first portion 33b, and the second portion 34b of the pleat 11b to each other in the thickness direction T. The joining portion 20c joins the base material 31c, the first portion 33c, and the second portion 34c of the pleat 11c to each other in the thickness direction T. The joining portion 20d joins the base material 31d, the first portion 33d, and the second portion 34d of the pleat 11d to each other in the thickness direction T. In the present embodiment, the joint portions 20a, 20b, 20c, and 20d are formed by embossing processing performed by sandwiching the second portion, the first portion, and the base material.

On the other hand, the connecting portion 12 is formed of an unfolded sheet 30 (formed of the sheet 30, but the sheet 30 forming the connecting portion 12 is unfolded). Therefore, the coupling portion 12 does not have the joint portion 20. Therefore, the sheet 30 is folded and the rigidity of the fold 11 in which the joint 20 is formed is high, and the sheet 30 is not folded and the rigidity of the connecting portion 12 in which the joint 20 is not formed is low at both ends in the lateral direction H of the mask body 3. Therefore, the connecting portion 12 may be easily deformed such as bent, as compared with the pleated portion 11.

Fig. 4 and 5 are diagrams showing an example of the structure of the joint 20 of the mask 1 according to the embodiment. However, fig. 4 is a plan view showing an exemplary configuration of the joint 20, and is shown with reference to the joint 20c among the joints 20a, 20b, 20c, and 20 d. However, the structure is the same as the joint portions 20a, 20b, and 20d except for the difference in orientation of some portions. Fig. 5 is a partial plan view showing a configuration example of the mask 1.

In the present embodiment, the joint 20 has the following structure in detail. The joint 20 includes an inclined direction joint 22 extending continuously or intermittently in a direction inclined with respect to the lateral direction H and the up-down direction V. The term "continuously extending" means that the joint portions 20 are connected in a linear or belt-like manner, and the term "intermittently extending" means that the joint portions 20 are arranged in a state in which a plurality of small joint portions are distributed. The shape of the small joint portion is not particularly limited, and examples thereof include a circle, an ellipse, a square, a diamond, and other polygons.

The joint 20 preferably includes an inclined joint 22. The inclined direction joint portion 22 extends continuously or intermittently in an inclined direction inclined with respect to the lateral direction H (at an angle θ) so as to extend from the top Tx (illustrated: ta, tb, tc, td) side toward the valley Vx (illustrated: va, vb, vc, vd) side of the fold 11 toward the outside of the lateral direction H (in the direction of the end edge 3E of the mask body 3). In other words, the oblique direction joint portion 22 is provided so as to extend in an oblique direction that is inclined from the valley Vx side toward the top Tx side of the pleat 11 toward the center portion (the vertical center line CV) of the lateral direction H, that is, in the direction P in which the pleat 11 spreads. Therefore, when the end portions of the plurality of pleats 11 in the transverse direction H are concentrated at the central portion in the up-down direction V, the sheet 30 of the connecting portion 12 having weak rigidity and the sheet 30 (for example, the base materials 31a, 31b, 31c, 31 d) of the adjacent pleats 11 can be easily bent in the oblique direction of the strongly rigid oblique direction joint portion 22.

The joint 20 preferably further includes a first lateral joint 21, and the first lateral joint 21 is disposed at or near an end of the fold 22 on the valley Vx side of the fold 11 in the oblique direction, and extends continuously or intermittently in the lateral direction H. Therefore, the rigidity and shape stability of the end portions of the pleat 11 in the lateral direction H can be improved. This can suppress bending of the end portions of the plurality of pleats 11 in the transverse direction H when the end portions of the plurality of pleats 11 concentrate in the central portion in the vertical direction V and the plurality of connecting portions 12 are bent.

The joint 20 preferably further includes a second lateral joint 23, and the second lateral joint 23 is disposed at or near an end of the fold 11 on the top Tx side of the oblique joint 22, and extends continuously or intermittently in the lateral direction H. Therefore, the rigidity and shape stability of the end portions of the pleat 11 in the lateral direction H can be improved. This can prevent the valley Vx of the plurality of pleats 11 from rising from the base material (for example, 31a, 31b, 31c, 31 d) when the ends of the plurality of pleats 11 in the transverse direction H are concentrated in the central portion in the vertical direction V and the plurality of connecting portions 12 are bent.

The positions of the first lateral joint portion 21 and the second lateral joint portion 23 in the lateral direction H may be the same, but it is preferable that the second lateral joint portion 23 on the top Tx side is located inward (on the side of the center line CV in the up-down direction) of the lateral direction H. As a result, the first lateral joint portion 21, the inclined direction joint portion 22, and the second lateral joint portion 23 as a whole form a joint portion 20 inclined in the inclined direction, and the operational effect of the inclined direction joint portion 22 can be further exhibited.

In the present embodiment, the oblique joint portions 22 are circular fusion-bonded portions 21a, 22b, 23b arranged at intervals in the oblique direction oblique to the transverse direction H by the angle θ on the pleat 11. The first transverse joint portion 21 is a circular fusion-bonded portion 21a, 21b arranged at a distance substantially parallel to the transverse direction H at an end portion on the valley Vx side of the pleat 11. The second transverse joint 23 is a circular fusion-bonded portion 23a, 23b arranged at a distance substantially parallel to the transverse direction H at the top Tx side end of the pleat 11. The welding portion 21a is used as both the oblique joint portion 22 and the first lateral joint portion 21, and the welding portion 23b is used as both the oblique joint portion 22 and the second lateral joint portion 23. However, the welding portions may not be used as the same, and separate welding portions may be separately provided.

Further, in the pleat portions 11a, 11b facing upward in the up-down direction V, the first lateral joint portion 21, the oblique direction joint portion 22, and the second lateral joint portion 23 are disposed in order from the lower side in the up-down direction V to the upper side, that is, from the valley portions Va, vb to the top portions Ta, tb. At this time, the second lateral joint portions 23 on the top Ta, tb sides are disposed on the inner side (the side of the center line CV in the up-down direction) in the lateral direction H. On the other hand, in the pleat portions 11c, 11d facing the lower side in the up-down direction V, the first lateral joint portion 21, the inclined direction joint portion 22, and the second lateral joint portion 23 are disposed in order from the upper side to the lower side in the up-down direction V, that is, from the valley portions Vc, vd toward the top portions Tc, td. At this time, the second lateral joint portions 23 on the top Tc and Td sides are disposed on the inner side (the side of the center line CV in the up-down direction) in the lateral direction H.

The length of the joint portion 20 in the up-down direction V is preferably 70% to 90% of the length of each of the plurality of pleats 11 in the up-down direction V. When the mask is worn, the bending direction of the adjacent connection portions 12 and the expanding direction of the plurality of pleats 11 can be guided to an appropriate direction (70% or more), and the degree of freedom of deformation of the adjacent connection portions 12 can be increased (90% or less). In addition, it is preferable that the end of the joint portion 20 in the up-down direction V is separated from at least one of the top Tx of the pleat 11 and the valley Vx of the pleat 11 in a plan view. Therefore, even when the mask is worn, a region that is bent together with the connecting portion 12 can be largely obtained in the fold portion 11.

Fig. 6 is a perspective view showing an example of wearing the mask 1 according to the embodiment, and fig. 7 is a partially enlarged view (perspective view) showing a lateral end portion of the mask 1 of fig. 6.

When the mask 1 having the plurality of pleats 11 (11 a to 11 d) is worn, the center portion of the plurality of pleats 11 in the lateral direction H is expanded in the vertical direction V, and a three-dimensional shape (cup) is formed in the mask body 3. At this time, the end portions of the plurality of pleats 11 in the lateral direction H move toward each other in opposition to the central portion. In other words, with the joint 20 as a fulcrum, the central portions of the plurality of pleats 11 in the lateral direction H expand in the up-down direction V, and the end portions of the plurality of pleats 11 in the lateral direction H approach each other. In the mask 1, connection portions 12 (12 a to 12 c) are provided between the pleats 11 adjacent to each other in the vertical direction V. Since the connecting portion 12 is formed of a part of the unfolded sheet 30, the rigidity is lower and the bending is easier than the fold 11 formed of a part of the folded sheet 30. Therefore, when the mask body 3 is formed in a three-dimensional shape, the bending portions 15 (15 a to 15 c) are formed by bending the plurality of connecting portions 12 having low rigidity, so that the mask body can be folded to the adjacent fold portions 11. Thus, the ends of the plurality of pleats 11 in the lateral direction H do not collide with each other or deform, and can smoothly approach each other.

However, in the example of fig. 7, the bending portion 15a of the bending portion 15 is formed by folding the connecting portion 12a and a part of the pleat 11a and/or the pleat 11b (a part of the second portion 34a and the base material 31 b). The bending portion 15b is formed by folding the connecting portion 12b and the pleat 11b and/or a part of the pleat 11c (the second portion 34b and a part of the second portion 34 c). The bending portion 15c is formed by folding a part of the connecting portion 12c and the fold 11c and/or the fold 11d (a part of the base material 31c and the second portion 34 d).

As a result, the ends of the plurality of folds 11 in the transverse direction H can be brought close to each other, and a part of them can be overlapped on the curved portion 15, so that the entire end of the mask body 3 in the transverse direction H can be easily deformed into a shape curved along the surface of the face of the wearer. Therefore, the gap between the middle region in the vertical direction V of the mask body 3 and the face surface can be kept free from occurring at the end of the mask body 3 in the lateral direction H, and the gap between the lower end and the face surface can be suppressed from occurring.

As a preferred embodiment of the present embodiment, the joint 20 includes an inclined direction joint 22 extending continuously or intermittently in a direction inclined with respect to the lateral direction H and the up-down direction V. In the mask 1, when the mask is worn, the central portions of the plurality of pleats 11 in the transverse direction H are expanded in the vertical direction V, and the plurality of connecting portions 12 are bent and folded to the adjacent pleats 11 while the end portions of the transverse direction H are brought close to each other. At this time, the direction in which the plurality of connecting portions 12 are bent and the direction in which the plurality of pleat portions 11 are expanded can be guided to an appropriate direction by the inclined direction joint portion 22. Thus, the end portion of the mask body 3 in the lateral direction H can take a curved shape along the face surface.

As a preferred embodiment of the present embodiment, the inclination direction joint portion 22 is provided so as to extend continuously or intermittently in an inclination direction inclined (at an angle θ) with respect to the lateral direction H from the top Tx (Ta, tb, tc, td) side toward the valley Vx (Va, vb, vc, vd) side of the pleat 11 as going outward in the lateral direction H. In other words, the oblique direction joint portion 22 is provided to extend in an oblique direction, which is a direction approaching from the valley Vx side to the top Tx side of the pleat 11 toward the center portion of the lateral direction H, that is, a direction oblique to the direction (at the angle θ) in which the lateral direction H expands toward the pleat 11. Therefore, when the mask is worn, the plurality of connection portions 12 are bent and folded to the adjacent fold portions 11, and the direction in which the plurality of connection portions 12 are bent can be guided to an appropriate direction by the inclined direction joint portions 22. In other words, the direction of the fold line formed by the bending of the sheet 30 at the bending portion 15 (15 a to 15 c) can be guided substantially in the direction along the inclined direction joint portion 22. For example, as shown in fig. 7, the bending portion 15a forms a fold line along the direction of the joint 22 of the pleat 11a and the pleat 11b in the oblique direction, and the bending portion 15c forms a fold line along the direction of the joint 22 of the pleat 11c and the pleat 11d in the oblique direction. This can guide the direction in which the plurality of pleats 11 extend to an appropriate direction, maintain the three-dimensional shape formed in the center of the mask body 3 in the lateral direction H, and allow the end portions of the mask body 3 in the lateral direction H to take a shape curved along the face surface.

As a preferred embodiment of the present embodiment, the joint 20 further includes a first lateral joint 21, and the first lateral joint 21 is disposed at or near an end of the fold 11 of the oblique joint 22 on the valley Vx side and extends continuously or intermittently in the lateral direction H. Therefore, rigidity and shape stability at the end portions of the plurality of pleats 11 in the lateral direction H can be improved. Therefore, when the mask is worn, the plurality of connection portions 12 are bent and folded to the adjacent fold portions 11, and the first lateral joint portions 21 can suppress bending at the end portions of the plurality of fold portions 11 in the lateral direction H. Thus, the end portion of the mask body 3 in the lateral direction H can maintain a curved shape along the face surface.

As a preferred embodiment of the present embodiment, the joint 20 further includes a second lateral joint 23, and the second lateral joint 23 is disposed at or near the top Tx side end of the pleat 11 of the oblique joint 22, and extends continuously or intermittently in the lateral direction H. Therefore, rigidity and shape stability at the end portions of the plurality of pleats 11 in the lateral direction H can be improved. Therefore, when the mask is worn, the ends of the plurality of pleats 11 in the transverse direction H can be restrained from floating in the thickness direction T by the second transverse joint portions 23 when the plurality of connecting portions 12 are bent and folded to the adjacent pleats 11. Thus, the lateral end of the mask body 3 can maintain a curved shape along the face surface.

In a preferred embodiment of the present invention, the length of the joint portion 20 in the vertical direction V is 70% to 90% of the length of each of the plurality of pleats 11 in the vertical direction V. Therefore, when the mask is worn, the joint portion 20 guides the bending direction of the plurality of connecting portions 12 and the expanding direction of the plurality of pleats 11 to an appropriate direction (70% or more), and the degree of freedom (90% or less) of deformation of the adjacent connecting portions 12 can be improved. This makes it possible to easily obtain a shape in which the end of the mask body 3 in the lateral direction H is curved along the face surface.

As a preferred embodiment of the present embodiment, the end portion of the joint portion 20 in the up-down direction V is separated from at least one of the top Tx of the pleat 11 and the valley Vx of the pleat 11 in a plan view. Therefore, when the mask is worn, a region that is bent together with the connecting portion 12 can be obtained in the fold portion 11. This can guide the bending direction of the plurality of connecting portions 12 and the expanding direction of the plurality of pleats 11 to appropriate directions, and can further improve the degree of freedom in deformation of the adjacent connecting portions 12. This makes it possible to easily obtain a shape in which the end of the mask body 3 in the lateral direction H is curved along the face surface.

As a preferred embodiment of the present embodiment, the lowermost connecting portion 12c of each of the plurality of connecting portions 12 in the vertical direction V has a width larger than that of the other connecting portions 12a, 12b (d 12c > d12a, d12 b). Therefore, when the mask is worn, the portion below the vertical direction V in the central portion of the mask body 3 in the lateral direction H can be further expanded downward in the vertical direction V. In contrast, when the plurality of connecting portions 12 are bent at the end portion of the mask body 3 in the lateral direction H and folded to the adjacent pleat 11, the lower end portion can be further bent. Therefore, the entire end portion of the mask body 3 in the lateral direction H can take a curved shape along the surface of the face of the wearer.

As a preferred embodiment of the present embodiment, the width of each of the plurality of connecting portions 12 in the vertical direction V increases as it goes from the upper side to the lower side of the vertical direction V. Therefore, when the mask is worn, the center portion in the lateral direction H of the mask body 3 can be further expanded downward in the vertical direction V. In contrast, when the plurality of connecting portions 12 are bent at the end portion of the mask body 3 in the lateral direction H and folded to the adjacent pleat 11, the lower end portion can be further bent. Therefore, the entire end portion of the mask body 3 in the lateral direction H can take a curved shape along the surface of the face of the wearer.

As a preferred embodiment of the present embodiment, the joint portion 20 is formed by embossing. Therefore, the joint portion 20 is less likely to fall off, and therefore the shape of the end portion of the mask body 3 in the lateral direction H can be stably maintained. This can stably suppress the occurrence of a gap between the lower end of the mask body 3 in the lateral direction H and the face surface.

In the present embodiment, as shown in fig. 1, the mask body 3 further includes a nose engaging member 41 at a portion corresponding to the nose when worn. The nose-adhering member 41 is sandwiched between the folded non-skin-side and skin-side sheets 30 at the upper end portion in the up-down direction V of the mask body 3, and is held by surrounding the joint portions 42.

In the present embodiment, the pair of ear hanging parts 5 are welded to the outer surfaces of the respective end parts in the up-down direction V of the two end parts in the lateral direction H of the mask body 3 by the welding parts 43. The welding portion 43 is formed by, for example, a method of welding the ear-hanging portion 5 and the mask body 3 by heat or ultrasonic waves. In another embodiment, the pair of ear hanging parts 5 are welded to the inner surfaces of the respective two ends in the up-down direction V of the two side parts of the mask body 3 in the lateral direction H by the welding parts 43.

In the present embodiment, the mask body 3 is formed by folding the sheet 30. The sheet 30 includes an inner sheet, not shown, which is positioned on the inner side, i.e., the skin side, when worn, an outer sheet, which is positioned on the outer side, i.e., the non-skin side, when worn, and a filter sheet positioned between the inner sheet and the outer sheet. In another embodiment, the mask body 3 includes 2 or more filter sheets. In still another embodiment, the mask body 3 is formed of 1 or 2 sheets as a whole.

The inner sheet, the filter sheet, and the outer sheet are positioned at both ends of the mask body 3 in the vertical direction V, and are welded to each other by a plurality of joint portions 42, 44 arranged along the lateral direction H and a plurality of joint portions 20 arranged at both ends of the lateral direction H. The shape of the engaging portions 42, 44, 20 is small circular or elliptical. However, the shape of the joint portions 42, 44 is not particularly limited, and examples thereof include dot, polygonal, pattern, combinations thereof, and the like. The joint portions 42, 44, 20 are formed by welding the inner sheet, the filter sheet, and the outer sheet by heat or ultrasonic waves.

In the present embodiment, the inner sheet and the outer sheet hold the filter sheet from both sides in the thickness direction, and the shape of the mask body 3 is maintained. From a functional standpoint, the inner sheet and the outer sheet are preferably higher in ventilation performance and higher in rigidity than the filter sheet. For the inner sheet, a better skin feel is preferable. As the basis weight of the inner sheet and the outer sheet, for example, 10 to 100g/m can be mentioned ² . On the other hand, when a gas such as air flows through the filter sheet, the filter sheet captures and collects a substance (hereinafter, also simply referred to as "minute substance") such as virus, bacteria, dust, pollen, or minute particulate substance (PM 2.5) that passes through the filter sheet together with the gas. The basis weight of the filter sheet may be, for example, 10 to 200g/m ² 。

Examples of the material of the inner sheet, the outer sheet, and the filter sheet include nonwoven fabrics. Examples of the nonwoven fabric include spunlaced nonwoven fabric, hot air nonwoven fabric, spunbonded nonwoven fabric, air-laid nonwoven fabric, melt blown nonwoven fabric, flash spun nonwoven fabric, thermally bonded nonwoven fabric, carded nonwoven fabric, and a nonwoven fabric obtained by combining several of them. The fibers constituting the nonwoven fabric are not particularly limited as long as they can be formed into a film by heat or ultrasonic melting. Examples of such fibers include synthetic resin fibers (for example, polyolefin such as polyethylene, polypropylene, polybutylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and ionomer resin, polyester such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid, and polyamide such as nylon). Further, natural fibers (for example, wool and cotton) and regenerated fibers (for example, rayon and acetate) may be partially contained. The fibers constituting the nonwoven fabric may be composed of a single component, or may be composed of composite fibers such as core/sheath fibers, parallel fibers, island/sea fibers, or the like. The nonwoven fabric may be a single layer, or may be a laminate (for example, SMS nonwoven fabric) in which a single layer of nonwoven fabric is laminated.

The filter sheet is preferably made of a material having a high trapping performance for minute substances as compared with the inner sheet and the outer sheet. In the present embodiment, for example, electret nonwoven fabric can be used as a material of the filter sheet. Electret nonwoven fabrics can capture and collect minute substances in gas by electrostatic force. Such nonwoven fabric is obtained by subjecting a nonwoven fabric to electret treatment. The electret nonwoven fabric is preferably made of a nonpolar polymer, and examples thereof include polypropylene, polyethylene, polystyrene, and combinations thereof.

In addition, from the viewpoint of capturing minute substances, the fiber density of the filter sheet is preferably higher than that of the inner sheet and the outer sheet. As the fiber density of the filter sheet, for example, 0.03 to 0.20g/cm can be mentioned ³ Preferably 0.05 to 0.10g/cm ³ . If the fiber density of the filter sheet is too high, the electret treatment may not reach the inside of the filter sheet due to, for example, the formation of an electric field in the filter sheet being hindered by the fibers. If the fiber density of the filter sheet is too high, the flow of gas is hindered, and the gas is difficult to pass through the filter sheet, and the ventilation performance may be lowered. On the other hand, if the fiber density is too low, the fibers capturing the minute substance are too small, which may result in a decrease in capturing performance.

The material of the ear-hanging portion 5 is not particularly limited as long as it is hung on the ear of the wearer, and examples thereof include an elastic member such as circular rubber or rectangular flat rubber having a circular cross section. Examples of the elastic member include woven rubber or knitted rubber formed by weaving or knitting synthetic resin fibers (fibers having stretchability may be used). In this embodiment, a woven rubber is used. The width of the woven rubber is unchanged even if the woven rubber is elongated. Since the ear-hanging portion 5 does not become thin when being hung on the ear, the area of the portion where the woven rubber contacts the ear of the wearer can be sufficiently ensured, and the wearing comfort of the mask 1 can be improved. Therefore, the mask 1 can accurately perform its original function and can be worn for a long period of time.

In the present embodiment, the plurality of pleats 11 include upper pleats 11a, 11b and lower pleats 11c, 11d. However, the present utility model is not limited to this example, and the orientation and number of the pleats 11 may be different. For example, the number of the upper-side-oriented pleats 11 and the number of the lower-side-oriented pleats 11 may be different. However, in this case, the number of the fold 11 facing downward is preferably large, since the occurrence of a gap between the lower end and the face surface at the end in the lateral direction H of the mask body 3 is easily suppressed.

Fig. 8 is an enlarged view (cross section) of a part of the center line along the vertical direction of the disposable mask according to another embodiment. In the mask body 3 of the other embodiment, the plurality of pleats 11 includes a plurality of pleats 11a, 11b, 11c, 11d all facing upward and a plurality of connecting portions 12a, 12b, 12c located between adjacent pleats 11. These and other configurations are described in the above embodiments. In addition, in the other embodiment, the plurality of pleats 11 may include a plurality of pleats all facing downward and a plurality of connecting portions between adjacent pleats.

The disposable mask of the present utility model is not limited to the above embodiments, and may be combined, replaced, or the like using the techniques of the embodiments or techniques known in the art, without departing from the object or gist of the present utility model.

Claims (10)

1. A disposable mask having an up-down direction, a lateral direction and a thickness direction, comprising: a mask body composed of sheets; and a pair of ear hanging parts extending from the two lateral side edges of the mask body, characterized in that,

the mask body is provided with:

a plurality of pleats formed by a part of the folded sheet, extending in the lateral direction, and arranged at intervals in the up-down direction; and

A plurality of connection portions formed of a part of the sheet that is not folded, located between the pleats adjacent in the up-down direction among the plurality of pleats,

the plurality of pleats each have an engagement portion at each of the lateral end portions, the engagement portions securing the respective sheets of the plurality of pleats to each other.

2. The disposable mask of claim 1 wherein the mask comprises a plurality of layers,

the engaging portion includes an inclined direction engaging portion that extends continuously or intermittently in a direction inclined with respect to the lateral direction and the up-down direction.

3. The disposable mask according to claim 2, wherein,

the oblique direction joint portion extends continuously or intermittently in an oblique direction oblique to the lateral direction so as to extend from a top side of the pleat toward a valley side as it extends outward in the lateral direction.

4. A disposable mask according to claim 3 wherein,

the joint portion further includes a first lateral joint portion disposed at or near an end of the oblique joint portion on the valley side of the pleat, and extending continuously or intermittently in the lateral direction.

5. The disposable mask according to claim 3 or 4, wherein,

the joint portion further includes a second lateral joint portion disposed at or near an end of the oblique joint portion on the top side of the pleat, and extending continuously or intermittently in the lateral direction.

6. The disposable mask according to any one of claim 2 to 4, wherein,

the length of the joint portion in the up-down direction is 70% to 90% of the length of each of the plurality of pleats in the up-down direction.

7. The disposable mask according to any one of claim 2 to 4, wherein,

in a plan view, the end portion of the joint portion in the up-down direction is separated from at least one of the top portion of the pleat portion and the valley portion of the pleat portion.

8. The disposable mask according to any one of claims 1 to 4, wherein,

for each of the plurality of connecting portions, a width of a lowermost connecting portion in the up-down direction is larger than that of the other connecting portions.

9. The disposable mask of claim 8 wherein the mask comprises a plurality of layers,

for each of the plurality of connecting portions, the width in the up-down direction increases as going from the upper side to the lower side in the up-down direction.

10. The disposable mask according to any one of claims 1 to 4, wherein,

the joint is formed by embossing.

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