JP2021183742A - Block sheet for pleated mask - Google Patents

Abstract

To provide a block sheet for a pleated mask that prevents an inner surface of the mask from becoming dirty before use, can prove that the mask is unused when worn, closes a gap between the mask and the face during use and prevents the re-scattering of contaminants when the mask is discarded.SOLUTION: A material is a non-woven fabric that has a dust filtration capacity equal to or higher than that of the pleated mask. A vertical slit 3 and a horizontal slit 5 including a vertical connection portion 4 and a horizontal connection portion 6 are provided on a sheet having substantially the same dimensions as the pleated mask, and a shape-retaining member 22 is joined at a predetermined position so as to make a block sheet 1.SELECTED DRAWING: Figure 1

Description

According to the present invention, a block sheet having the same dimensions as the pleated mask can be joined to the inside of the pleated mask to prevent the block sheet from contaminating the inside of the mask before use, and the block sheet can be placed above and below.・ By dividing the mask into 4 blocks, left and right, and then attaching it, it is possible to confirm that this mask is an unused item when using it, and it occurs between the upper edge of the mask and the nose when the mask is attached. It can be closed with the shape-retaining member of the upper block that divides the gap, and the gap between the mask side edge and the cheek that occurs when the mask pleats are opened can be closed with the flap part of the left and right blocks, and it has been used. When disposing of the mask, the present invention relates to a block sheet and a mask with a block sheet attached so that the upper block wraps around the contaminated part of the mask and can be disposed of.

Pleated masks made by folding a non-woven filter are inexpensive and widely used, and they are thin and rectangular, which makes them convenient for storage and carrying. It can cover a large area around the mouth, and the pleated part can absorb the movement of the jaw according to the vertical movement of the jaw during conversation, so it has the advantage of being easy to talk. In addition, pleated masks are generally packaged in dozens of pieces in a box or in a bag, and many of them are not individually wrapped. There is a risk that the mask will get dirty depending on how it is stored or carried. In addition, high-performance masks such as N95 masks for medical use are beginning to be regenerated and used based on the backing of reproduction technology, which may extend to disposable pleated masks. For easily used pleated masks If the mask has a means to confirm that it is an unused product, the pleated mask can be used with confidence. In addition, the most inferior point of pleated masks to high-standard masks such as N95 is that there is a large gap between the mask and the face when worn, and leakage is 60 to 70%. There is a big difference from less than 1% of N95 mask. In addition, pleated masks are used for medical surgical masks, and as masks used in medical settings where various bacteria may be present, surgical masks with as little leakage as possible are reliable for protection as masks. To increase. Also, pleated masks do not have established rules for handling and are often littered in the trash as combustible waste when disposed of, but used masks may have various contaminants on them. It is recommended to put it in a plastic bag and then throw it away, but it is troublesome to prepare a plastic bag and throw it away almost as it is. Therefore, there is a means to prevent the spread of contamination when throwing it away. This mask helps prevent the spread of pollution.

In addition, as a problem of leakage due to the gap between the mask and the face when wearing it, for example, when there is pollen in the air and the mask is used for the purpose of preventing inhalation, the pollen in the air bypasses the mask and inhales. There is a risk of entry, and there is a risk that the exhaled air of a person with a respiratory disorder will not be properly filtered by the mask and will diffuse. Also, a familiar problem is that the exhaled air discharged from the gap of the mask cloudes the glasses, and there are some suggestions on how to close the gap between the nose and the mask to eliminate this problem, but with the cheeks. As for the method of closing the gap generated between the masks, no effective proposal has been made other than the method of closing with a sponge or the like.

As a method of closing the gap between the mask and the nose, as seen in Patent Document 1 below, a plastically deformable wire or resin member called a shape-retaining member is attached to the upper part of the mask, and this is attached to the nose. Some are bent to fit the shape and close the gap with the nose.

In addition, as another method, as seen in Patent Document 2 below, by providing a seamlessly expanded portion on the upper part of the mask and bending it toward the face side, the gap between the mask and the face is narrowed and exhalation is performed. There is one that prevents the air from leaking upward and bends it to create a substantially inverted V-shaped space so that exhaled air enters the space and does not leak upward to prevent the glasses from becoming cloudy. ..

Further, as another method, as seen in Patent Document 3 below, a thin film piece having extremely low air permeability is provided inside the upper part of the mask, and the thin film piece is placed on the face by using the air pressure of the exhaled breath exhaled from the mouth and nose. There is a method in which a thin film piece closes the gap between the mask and the face by pressing, and a method in which a sponge-like closing member having appropriate elasticity and current restoring force is provided on the inner upper part of the mask in order to close the gap.

Further, as another method, as seen in Patent Document 4 below, a gap closing sheet with a shape-retaining member is provided inside the upper edge of the mask, and when the mask is attached, the tension of the ear hook string becomes a facial shape. The structure does not act as a force to flatten the facial shape of the shape-retaining member that has been deformed together, so that the shape-retaining member can maintain the facial shape for a long time and close the gap between the mask and the nose. There is something I did.

JP 2006-305279 JP 2013-075130 JP 2009-066382 JP 2017-203221

However, the contents described in the above-mentioned Patent Documents 1, 2, 3 and 4 are countermeasures for the problem of wearing the mask, and the technology and the technology that the surface in contact with the face inside the mask is not contaminated before wearing the mask. , There is no description about the technology that can prove that it is an unused product when used, and the technology that does not re-scatter pollutants when throwing away used masks.

Further, the means for solving the problem of the gap between the face and the mask when worn described in Patent Documents 1, 2 and 4 is described in the description of the method for closing the gap between the nose and the mask. Therefore, even if this means is used, it is not effective as a method of closing the gap generated between the cheek and the mask.

The method described in Patent Document 1 in which a plastically deformable shape-retaining member is provided on the upper edge of the mask and the shape-retaining member is deformed according to the face shape to close the gap is inexpensive and does not give a feeling of oppression when worn. Although it is a method, when the mask is worn, the tension of the ear hook acts as a force to flatten the bending of the shape-retaining material at the upper edge of the mask, so after wearing the mask, it gradually becomes between the upper edge of the mask and the face. In the method of closing the gap with a shape-retaining member provided on the upper edge of the mask according to the shape of the face that is different for each person, if the height of the nose is high, the tip of the nose will be masked when worn. The ridgeline of the nose separates from the mask in contact with the mask, making it difficult to bring the shape-retaining member on the upper edge of the mask into close contact with the face. In addition, there is a description of the technology that keeps the inner surface of the mask in contact with the face clean before use, the technology that can prove that it is an unused product, and the technology that does not re-scatter contaminants when the mask is thrown away. Also, it is difficult to envision from this document how to close the gap between the cheek and the mask.

By providing a seamlessly expanded portion on the upper part of the mask described in Patent Document 2 and bending it toward the face, the gap between the mask and the face is narrowed to prevent the exhaled air from leaking upward. By bending it to create a substantially inverted V-shaped space, it has the effect of preventing exhaled air from entering the space and leaking upwards, preventing the glasses from becoming cloudy, but when inhaling exhaled air, it enters downwards. If the mask is worn in an environment containing pollen and harmful fine particles, there is a risk that the pollen and harmful fine particles will be sucked in through the gaps. In addition, there is a description of the technology that keeps the inner surface of the mask in contact with the face clean before use, the technology that can prove that it is an unused product, and the technology that does not re-scatter contaminants when the mask is thrown away. Also, it is difficult to close the gap between the cheek and the mask by the method of this document.

By providing a thin film piece having extremely low air permeability inside the upper part of the mask described in Patent Document 3 and pressing the thin film piece against the face using the air pressure of the exhaled breath exhaled from the mouth and nose, the thin film piece becomes the mask and the face. In the method of closing the gap between the face and the face, the air pressure acts in the opposite direction when sucking the exhaled air, creating a gap between the thin film and the face, so the effect of preventing leakage cannot be expected, and pollen and harmful. Even if the mask is worn in an environment containing fine particles, there is a risk that pollen and harmful fine particles will be sucked in through the gaps. Further, in the method of providing the sponge-like obstructing member having appropriate elasticity and resilience as described in Patent Document 3, since the shapes of the mask and the nose and cheeks are different for each individual, the obstructing material having a fixed shape is used individually. It is difficult to reliably close the gap between the face of a different shape, and in order to close it more reliably, the thickness of the obstructing material must be increased and the face must be pressed strongly, which makes the face uncomfortable and uncomfortable during conversation. It becomes difficult to move the mouth, and sweat does not evaporate at the part where the sponge-like obstruction member comes into contact with the face, and it easily accumulates, which impairs comfort. In addition, this book describes technologies that keep the inner surface of the mask in contact with the face clean before use, that can prove that it is unused, and that it does not re-scatter contaminants when the mask is thrown away. Not mentioned in the literature.

In the mask described in Patent Document 4, a gap closing sheet with a shape-retaining member for preventing fogging of the glasses is provided inside the upper edge of the pleated mask, and when the mask is attached, the tension of the ear hook string retains the shape. The structure is such that it does not act as a force to flatten the bending of the material, and the shape-retaining member deformed according to the face shape can maintain the face shape for a long time. There is no mention of techniques that keep the mask clean before use, that can prove to be unused, that prevent the re-scattering of contaminants when the mask is thrown away, and between the cheeks and the mask. It is difficult to close the gap created in the above by the method of this document.

In order to achieve the above object, the mask according to the present invention is characterized in that a block sheet having the same dimensions as the mask is superposed on a mask in which a non-woven fabric filter is pleated and the surroundings are joined to form the mask. And.

Since the block sheet is a flat rectangular sheet of the same size as the pleated mask and covers the entire inner surface of the mask, it is characterized in that the inner surface of the mask can be prevented from becoming dirty during storage or carrying.

In addition, before attaching this mask, it is necessary to break the joint between the vertical slit and the horizontal slit of the block sheet that covers the inner surface (the part without a slight cut) and divide the block sheet into four parts. It is characterized in that this mask, in which the joint portion is not broken, can be proved to be an unused product due to the structure in which the broken portion cannot be returned to the original state after the division.

In addition, when wearing this mask, the joint part between the vertical slit and the horizontal slit (the part without a slight cut) is broken so that the vertical slit and the horizontal slit communicate with each other, and the block sheet is placed above and below.・ Divide into 4 blocks on the left and right, fold the upper block at the position of the fold line, align the shape-retaining member with the position of the upper edge of the mask, and then place the upper edge of the mask about 30 mm above the tip of the nose. In many cases, the ridgeline of the nose joins the mask, but if the nose is tall due to different facial shapes, the tip of the nose tends to abut on the mask and the upper edge of the mask tends to separate from the nasal muscles. In this state, when the shape-retaining member of the upper block is molded into the shape of a face from the ridge of the nose to the ridge of the upper cheek, the shape-retaining member is separated from the upper edge of the mask, and the upper block sheet is a folded part. Is opened and the cross section becomes V-shaped, and the opening part where the shape-retaining member and the upper edge of the mask are separated from each other is the opening part of the V-shaped upper block sheet whose apex is the shape-retaining member and the upper edge of the mask. It is characterized by closing the gap according to the shape.

Next, when the pleats of the attached main mask are expanded downward, the side edge of the main mask draws a gentle curve and has the characteristic that the outside of the side edge turns away from the face and rises. The flat arc part (flap) with a bulge of about 10 mm on the inside of the right block turns toward the face and is pressed against the face, and the left and right blocks are the gap between the cheek and this mask. It is characterized by being able to block.

Also, when disposing of the used book mask, close the pleats of the book mask that was open when wearing it to make it into a square flat plate, and then fold the surface to which the contaminants are attached inside. By further folding or rolling it to make it as small as possible, then expanding the folded part of the upper block to extend it to a sufficient length, and then wrapping the reduced mask, harmful substances such as pollen will not be scattered again. The feature is that this mask can be discarded.

The block sheet of the present invention is a flat rectangular sheet having the same size as the pleated mask and is attached so as to cover the entire inside of the pleated mask. Therefore, the inside of the mask is protected from external contamination during storage and carrying. Can defend.

Further, in order to use the present mask of the present invention, it is necessary to break the connection portion between the vertical slit and the horizontal slit to divide the block sheet into four parts, and the broken connection portion should be returned to the original state. Therefore, it can be proved that this mask whose connection part is not broken is an unused product.

Also, if you wear this mask that divides the block sheet into four and shape the shape-retaining member according to the shape of the nose and upper cheek of the face, the cross section of the upper block sheet becomes V-shaped and the face. Even if there is a difference in the size of the opening between the shape-retaining member and the upper edge of the mask due to the difference in the shape of, the size of the opening between the upper edge of the mask and the face depends on the opening angle of the V-shape of the upper block sheet. The upper block sheet can be adjusted, and since one end is in close contact with the face via the shape-retaining member and the other end is joined to the upper edge of the mask, the opening can be reliably closed.

When the pleats of the mask are expanded downward after wearing the present mask of the present invention, the side edges of the present mask have the characteristic of drawing a gentle curve and turning the outside of the side edges away from the face to rise up. The flaps of the left and right blocks (the flat arc part with a bulge of about 10 mm inside) that are joined to the side edges of this mask turn toward the face and hit the face, and the left and right blocks It can close the gap between the cheek and face. Therefore, since it is not necessary to provide a sponge-like closing member in this portion, it is not necessary to strongly press the mask against the face, and the comfort is not impaired when the face is pressed and worn. In addition, since the lower edge and the chin can be in contact with each other with almost no gap in the pleated mask, the leakage of the mask can be reduced.

When the present mask of the present invention is attached, the tension of the ear strap acts from the upper and lower ends of the left and right blocks to the upper and lower edges of the mask, and the shape-retaining member attached to the upper block is tensioned. Therefore, even if it is worn for a long time, the bending of the shape-retaining member is not flattened by the tension of the ear strap.

In addition, when discarding the used book mask, fold the surface of the mask to which the contaminants are attached inside, make it sufficiently small, and then wrap the small mask in the upper block and discard it to pollen, etc. It is characterized by being safe to handle without re-scattering harmful substances.

It is a front view of a block sheet. It is a front view of the block sheet which folded the upper block upward. It is the figure which looked at this mask with the pleats expanded from the block sheet side. It is a top view and a partial cross-sectional view of this mask in the state of wearing it. It is a vertical cross-sectional view which shows an example of this mask attached. It is a figure which shows the method of discarding a used book mask.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of the block sheet.
FIG. 2 is a front view of the block sheet with the upper block folded upward.
FIG. 3 is a view of the mask with the pleats spread out from the block sheet side.
FIG. 4 is a plan view and a partial cross-sectional view of the mask in a mounted state.
FIG. 5 is a vertical cross-sectional view showing an example of the attached mask.
FIG. 6 is a diagram showing a method of disposing of the used mask.
Note that FIG. 1 is a single block sheet 1, and FIGS. 2 to 6 are diagrams of the present mask (pleated mask with block sheet) in which the pleated mask 100 is joined to the block sheet 1. Further, FIG. 2 is an explanatory diagram regarding preparation before mounting, FIGS. 3 to 5 are explanatory views of the mask in a mounted state, and FIG. 6 is an explanatory diagram regarding processing of the mask after use.

FIG. 1 is a front view of the block sheet 1 according to the present invention. The block sheet 1 is a thin, rectangular non-woven fabric, and its performance as a filter is equal to or higher than that of the pleated mask 100. It is a non-woven fabric that has the same breathability as the pleated mask 100 or has a slightly higher resistance. The block sheet 1 is provided with vertical slits 3 on both sides, and the ear hook string 21 is joined to the semi-circular string attachment portion 2 at the upper and lower ends of the vertical slit 3. In addition, a horizontal slit 5 is provided so that both ends are joined to the vertical slit 3 horizontally at a height of 2/3 to 3/4 from the upper edge of the block sheet 1, and a shape that can be plastically deformed on the upper side of the horizontal slit 5. The holding member 22 is joined. The block sheet 1 and the pleated mask 100 are joined by the outer peripheral joining portion 101 and the lower block joining portion 102, and the joining method is generally welded by ultrasonic waves, and the joining is used as the present mask.

Next, the point of dividing the block sheet 1 into four will be described. The block sheet 1 is provided with two vertical slits 3 and one horizontal slit 5, and each slit has a part (joint part) that does not slightly slit at a predetermined position. The structure is such that the block sheet 1 can be divided into four blocks if it breaks before mounting. Specifically, the vertical slits 3 are located on both sides of the block sheet 1, and are composed of flat arc slits with a bulge of about 10 mm in the center and semi-circular slits at both ends of the arc slits. The joint 4 is in the central part. In addition, the horizontal slit 5 is a linear horizontal slit 5 that is at a height of 2/3 to 3/4 from the upper edge of the block sheet 1 and both ends communicate with the vertical slit 3, and is 2 in the central part. There is a lateral joint 6 that does not slightly slit at a distance of about 10 mm to 20 mm. When the slightly non-slitted portion of each slit is separated in the order of the horizontal joint portion 6 and the vertical joint portion 4, all the slits communicate with each other and the block sheet is separated into four blocks of upper, lower, left and right.

FIG. 2 shows the shape-retaining material when the shape-retaining member 22 joined to the lower side of the upper block 8 of the block sheet 1 divided into four is folded back through the fold line 7 at the middle height of the upper block 8. 22 is a front view of the block sheet 1 showing a state in which 22 overlaps the upper edge of the mask.

FIG. 3 is a view from the inside of a state in which the block sheet 1 according to the present invention is joined to the pleated mask 100 and the pleats of the integrated mask are opened. The part A below the upper block sheet 1 is the opening of the block sheet 1.

FIG. 4 is a view of the block sheet 1 in a state where the block sheet 1 according to the present invention is joined to the pleated mask 100 and the pleats of the integrated mask are expanded, as viewed from above. B shows the cross section of the side edge of the mask, and when the pleats of this mask are expanded, the outside of the side edge of the left block 9 and the right block 10 turns away from the face, and the inside turns toward the face accordingly. It shows the state of facing, and the flap 12 of the left block 9 and the right block 10 joined to the side edge as the side edge moves, turns in the direction of the face and presses against the face. The flap 12 of the left block 9 and the right block 10 can close the gap that occurs between the cheek and the side edge of this mask when the pleats are open.

In Fig. 5, when the shape-retaining member 22 is molded from the ridge of the nose to the ridge of the upper cheek after wearing the mask, the tip of the nose touches at the position where it is lowered from the upper edge of the mask, and at the same time, the upper edge of the mask is formed. Is a diagram showing the state of being separated from the nose muscle. The size of the opening between the upper edge of the mask and the face can be adjusted, and one end of the upper block sheet 8 is in close contact with the face via the shape-retaining member 22, and the other end is joined to the upper edge of the mask. Because it is, the opening can be closed.

Figure 6 shows the left figure showing the mask with the pleats closed by grasping the side edge of the used book mask and pulling it left and right, and the figure on the right shows the outside (dirty side) of the mask folded inward. , Further folded or rolled to make it smaller, and the outside thereof is wrapped with the upper block sheet 8. When using this mask, extend the V-shaped upper block sheet 8 inside the upper part of the mask, wrap the dirty mask, and after discarding the pollen and other fine particles adhering to the mask. It is a figure which shows that it does not re-scatter to the outside.

A method of dividing the block sheet 1 covering the inner surface of the mask into four blocks when the mask is attached will be described. When the central part of the upper and lower edges of this mask is grasped and pulled up and down, tension does not act on the pleats of the pleated mask 100, and tension is applied only to the lateral joint 6 of the lateral slit 5 on the block sheet 1. Then, when the shape-retaining member 22 on the upper side of the horizontal slit 5 is lifted upward, a shearing force acts on the vertical joint 4 of the vertical slit 3 to cut the joint. .. The vertical joint portion 4 and the horizontal joint portion 6 of the vertical slit 3 and the horizontal slit 5 are broken, and the vertical slit 3 and the horizontal slit 5 communicate with each other, so that the block sheet 1 becomes the upper block 8, the left block 9, the right block 10, It is divided into four parts of the lower block 11.

When this mask is attached, the shape-retaining member 22 and the upper block with a V-shaped cross section with the upper edge of the mask as the apex, both ends of the sheet 8 are pressed against the face by the upper ends of the pleated mask 100 to form the upper block.・ The sheet 8 has a bag shape, and the exhaled air that passes through the opening on the upper edge of this mask always passes through the upper block made of a non-woven fabric filter. Sheet 8 opens in a V-shape and comes into close contact with the face, ensuring that the exhaled air is filtered.

When the pleats of this mask are expanded downward after wearing the present mask of the present invention, the side edges of the present mask have the characteristic of drawing a gentle curve and turning the outside of the side edges away from the face to get up. The flaps 12 of the left and right blocks 9 and 10 joined to the side edges of this mask can be turned toward the face and pressed against the face to close the gap between the cheeks and the face. Furthermore, depending on the application, if the raised edges of this mask are folded forward with a finger, the flaps 12 of the left and right blocks 9 and 10 will come into close contact with the face while outside the mask, and will be used for inhalation and exhaust of exhaled air. On the other hand, the role of a valve that is closed during intake and open during exhaust can be effectively used.

Further, the block sheet 1 is divided into four parts, the shape-retaining member 22 of the upper block 8 is folded back along the folding line 7, overlapped with the upper edge of the mask, and the mask is attached to the face, and the shape-retaining member is attached to the face. The inner surface of the mask will not be touched by the finger until it is molded together, and the upper block 8 and lower block 11 of the block sheet 1 to which the finger touches are located at the upper and lower edges of the mask and come into contact with the nose and mouth. Since there is no need to do so, the mask can be handled hygienically until the mask is put on.

Regarding the handling of the used book mask, grasp the left and right vertical edges of the used book mask removed from the face and pull it horizontally to close the pleats, make the mask into a flat rectangular shape, and make it in the same direction as the pleats. Fold it sideways to fold the outside (dirty side) of the mask inside, then fold it or roll it to make it elongated, and it is on the outside of the mask that encloses the dirty part inside, and inside the mask when it is attached. Extend and wrap the upper block 8 that was folded into a V shape that closes the gap between the mask and the nose, tie it with an ear strap 21, or fix it with double-sided tape 23 and discard it. As a result, the mask can be discarded so that the attached fine particles such as pollen do not scatter again.

The pleated mask uses a non-woven fabric filter with higher filtering performance than gauze and cloth as a material, and it is mainly used in daily life and has a proven track record as a surgical mask. Recently, the spread of infectious diseases It has been evaluated as effective as a preventive measure, and while it has a large area, is easy to breathe and is convenient, and has the effect of keeping the breathing air warm and moisturized, it is evaluated visually because of the large variation in performance and quality. It is a difficult product to do, and it is considerably inferior to the N95 mask in terms of breathing air leakage. As an improvement against leakage, there is an upper block sheet with a V-shaped cross section inside the upper part of the mask for the gap that occurs between the upper edge of the mask from the nose to the upper cheek, and there are various gaps with V-shaped opening. It is a structure that can flexibly adapt to the size and shape of the mask and close the gap, and for the gap that occurs between the cheek and the side edge of the mask, when the pleats are expanded, the flaps of the left and right blocks will be on the face. Due to the structure that is pressed against the cheeks and closes the gap, a big improvement can be expected compared to the conventional leak of pleated masks of 60 to 70%. It can be expected that it will be usable. Furthermore, the inside of this mask before use can be kept hygienic, and the joints cut during use cannot be restored to their original state once cut, so it can be reliably determined that they are unused, so safety and hygiene. Increases reliability on the surface. Further, after use, the block sheet is a mask that can wrap the contaminated portion of the mask and dispose of the collected particles without diffusing. In this way, the pleated mask with this block sheet can be expected to be more effective as a countermeasure against pollen and influenza than the gauze mask and cloth mask while maintaining the ease of use for general use. In addition, the presence of a block sheet in this mask ensures reliability in terms of performance, quality, safety, and hygiene, so it can be differentiated from other pleated masks.

1 Block sheet 2 String attachment part 3 Vertical slit 4 Vertical joint part (part with no notch)
5 Horizontal slit 6 Horizontal joint (part with no notch)
7 Fold line 8 Top block (sheet)
9 Left block (sheet)
10 Right block (sheet)
11 Lower block (sheet)
12 flaps (flat arc part with a bulge of about 10 mm on the inside)
21 Ear hook string 22 Shape-retaining member 23 Double-sided tape 100 Non-woven fabric part of pleated mask or pleated mask 101 Outer peripheral joint 102 Lower block joint A Opening B Vertical edge cross section C V-shaped upper block sheet when attached

Claims (8)

The block sheet 1 is made of a non-woven fabric having a dust filtration capacity equal to or higher than that of the pleated mask 100, and has almost the same dimensions as the pleated mask 100. The block sheet 1 has two vertical slits. It has 3 and 1 lateral slit 5, and is a notch line slightly in contact with the slit, and the shape-retaining member 22 is joined to a predetermined position of the block sheet 1. The vertical slit 3 has a flat arc shape with the center bulging about 10 mm inward, and is provided at opposite positions on the left and right sides of the block sheet 1, and the vertical joint portion with no notch in the center of the vertical slit 3 is slightly cut. There are 4, and the horizontal slit 5 is provided at a position 3/4 to 2/3 in height from the upper edge of the block sheet 1 with the left and right ends connected to the vertical slit 3 horizontally, and is provided in the center of the horizontal slit 5. Has a horizontal joint 6 with a slight notch in two slits at intervals of about 10 mm to 20 mm, and the shape-retaining member 22 is joined to the upper side of the horizontal slit 5 along the horizontal slit 5. A block sheet for pleated masks featuring. A semi-circular string attachment portion 2 is provided at the upper and lower ends of the left and right vertical slits 3 of the block sheet 1 according to claim 1, and the ear hook string 21 is attached to the string attachment portion 2 so that the end faces outward. A mask characterized in that a non-woven fabric portion of a pleated mask 100 having the same dimensions is joined to a block sheet 1 joined to. A mask according to claim 1, wherein the block sheet 1 is joined to a pleated mask 100 having an ear strap 21. The mask according to claim 2 and 3, characterized in that the inner surface of the mask can be prevented from becoming dirty by keeping the inner surface of the mask covered with the block sheet 1 until the mask is attached. .. In the present mask according to the second and third aspects, the vertical joint portion 4 and the horizontal joint portion of the block sheet 1 that covers the inner surface of the mask before mounting the vertical slit 3 and the horizontal slit 5 without a slight cut. The vertical joint 4 and the horizontal joint 6 are broken due to the structure that requires the procedure of breaking 6 and dividing the block sheet 1 into four, and the broken part cannot be restored to the original state after the division. This mask, which has not been used, is characterized by being able to prove that it is an unused product. When the present mask according to claim 2 and claim 3 is attached, the vertical slit 3 and the horizontal slit 5 of the block sheet 1 are broken into the vertically joint portion 4 and the horizontal joint portion 6 which are not slightly cut, and the vertical slit is formed. The block sheet 1 is divided into four blocks, upper, lower, left, and right, so that 3 and the horizontal slit 5 communicate with each other, and the upper block 8 is folded back at the position of the fold line 7 to cover the shape-retaining member 22 with this mask. When the shape-retaining member 22 is attached to the position of the upper edge and brought into close contact with the face according to the shape of the ridge of the nose to the ridge of the upper cheek, the shape-retaining member 22 is separated from the upper edge of the mask and the upper block sheet. The cross section of 8 is V-shaped, and at that time, it is possible to adjust the size of the separation by the opening angle of V-shape, and both ends of the V-shaped upper block sheet 8 are the upper part of the pleated mask 100. As a result of being pressed against the face by both ends, the upper block sheet 8 has a V-shaped bag shape, and the exhaled breath that passes through the opening at the upper edge of this mask always passes through the upper block sheet 8 made of a non-woven fabric filter. Characteristic mask. Further, as in the preceding paragraph, when the pleats of the present mask are expanded downward after wearing the present mask according to the second and third aspects, the side edge of the mask draws a gentle curve and the outside of the side edge is a face. It has the characteristic of turning away from
Along with that, the flaps 12 of the left block 9 and the right block 10, which have a bulge of about 10 mm inward, turn to the direction of the face and are pressed against the face, closing the gap between the cheek and the main mask. Characterized mask. Further, in the present masks according to claims 2 and 3, when the used main mask is discarded, the pleats that were open at the time of mounting are closed to form a square flat plate, and then the contaminants of the present mask adhere to the mask. Fold the surface inward to make it as small as possible by folding or rolling it, and then when mounting, expand the V-shaped upper block 8 to make it long enough to stretch and wrap it, and then make this mask smaller. A mask characterized by being able to dispose of harmful substances without transferring or scattering them by wrapping them.

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