JP6387474B1 - mask - Google Patents

Abstract

A mask for easily turning a mouthpiece sheet is provided. The mask includes a main body portion in which a plurality of sheets are stacked, and pleats including a mountain fold line 16 and a valley fold line 17 extending in the left-right direction are formed at one or a plurality of locations on the main body portion. Of the plurality of sheets, the mouthpiece sheet 21 in contact with the wearer's mouth has left and right perforation lines 33 and 34 extending in the vertical direction, and perforation lines 35 and 36 connecting the upper and lower ends of the left and right perforation lines 33 and 34. The periphery is demarcated by the above, and a cut-off portion 40 is provided. In the left and right perforation lines 33 and 34, there is at least one portion where the unbroken portion 31 is not formed on the folding surface 21a between the mountain fold line 16 and the valley fold line 17 in the pleat. [Selection] Figure 4

Description

  The present invention relates to a mask attached to the mouth. More specifically, the present invention relates to a mask capable of partially turning a part of a sheet in contact with a wearer's mouth.

  Conventionally, there has been known a mask capable of removing a mouthpiece sheet soiled with a foundation or lipstick (Patent Document 1). Patent Document 1 includes a mask main body portion that has a fold and expands, and ear hook portions provided on the left and right sides of the mask main body portion, so that the mouthpiece sheet provided on the mask main body portion can be removed. A plurality of attached masks are disclosed. Further, Patent Document 1 discloses that "the mouthpiece sheet is detachably attached to the mask main body portion by perforation".

JP 2008-301962 A

  By the way, when the mask main body has a structure having pleats that can be expanded according to the folds, as in the mask described in Patent Document 1, a portion where the sheets constituting the mask are folded is formed on the mask main body. The Rukoto. In such a structure, if the perforation sheet can be removed by forming a perforation in the mask body, it becomes difficult to separate the unbroken portion of the perforation at the portion where the sheet is folded. That is, there is a surface (folding surface) that is sandwiched between the front and back sheets at the part where the sheets are folded, and the perforations formed on this folding surface are hidden in a position that cannot be seen from the skin facing surface side. , There is a problem that the work of breaking the perforations on the folding surface is difficult compared to the perforations of other parts. Thus, it was difficult for the mask having pleats to turn the mouthpiece sheet along the perforation line.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mask that can easily turn a mouthpiece sheet.

  The inventor of the present invention has intensively studied the means for solving the problems of the above-described conventional invention. As a result, a masked portion surrounded by a perforation line is formed in a mask having pleats. It was found that by providing a portion where the uncut portion is not formed in the folding surface located between the two, the turning portion can be easily turned along the perforation line even with a mask having pleats. Then, the present inventor has realized that the problems of the conventional invention can be solved based on the above knowledge, and completed the present invention. More specifically, the present invention has the following configuration.

  The present invention relates to a mask attached to the mouth. The mask according to the present invention includes a main body in which a plurality of sheets are stacked. In the main body, pleats including a mountain fold line and a valley fold line extending in the left-right direction are formed at one or a plurality of locations. By forming the pleats in this way, the main body can be expanded in the vertical direction. The plurality of sheets constituting the main body include a mouthpiece sheet that is in direct contact with the wearer's mouth. A perforation line is formed on the mouthpiece sheet. The perforation line is formed by alternately forming uncut portions and cut portions. The mouthpiece sheet is defined by at least three sides defined by left and right perforation lines extending in the vertical direction and perforation lines or slit lines connecting either or both of the upper and lower ends of the left and right perforation lines. (Surrounding part). In the mask of the present invention, at the left and right perforation lines, there is at least one portion where the unbroken portion is not formed on the folding surface between the mountain fold line and the valley fold line in the pleat. When the pleats are formed at a plurality of locations, it is preferable that the left and right perforation lines are not formed with unbroken portions in the folding portions of all the pleats. However, the left and right perforation lines only need to have a portion where the uncut portion is not formed in the folding surface of at least one pleat, and the uncut portion is formed in the folding surface of the other pleats. There may be places. As described above, by not forming a perforated portion of the perforation line in the folding surface of the pleats, it becomes easy to separate the turning portion of the mouthpiece sheet along the left and right perforation lines.

  In the mask according to the present invention, it is preferable that the left and right perforation lines are formed so that the cut portion crosses the folding surface, and the uncut portion is formed on a non-folding surface adjacent to the folding surface. In this way, by forming only the cut portion on the folding surface, it becomes easy to separate the turning portion of the mouthpiece sheet along the perforation line, and by forming the uncut portion in the non-folding surface, the turning portion Can be prevented from inadvertently breaking from the mouthpiece sheet. In addition, when the pleat is formed in multiple places, it is preferable that the notch part is formed so that all the folding surfaces may be crossed. Moreover, it is preferable that at least one or more unbroken portions exist in all non-folded surfaces.

  In the present invention, the main body has a fusion line in which a plurality of sheets are fused along the four sides of the top, bottom, left, and right. In this case, the turning portion is preferably formed in a region surrounded by the fusion line. If the perforation line and slit line for defining the turning part are formed on the above-mentioned fusion line, it becomes difficult to separate the turning part from the mouthpiece sheet, but the perforation line and the slit line do not overlap with the fusion line as in the above configuration. By doing so, the turning portion can be easily separated.

  In the present invention, it is preferable that at least one of the four corners of the turning portion is formed in an arc shape. By doing in this way, it becomes easy to turn a turning part from an arc-shaped corner part.

In the present invention, the length ratio a (CL _min / CL _max ) of the shortest cut portion (CL _min ) to the longest cut portion (CL _max ) in each of the left and right perforation lines is 0.05 <a ≦ Preferably it is 0.5. In the present invention, for example, a long cut portion is formed on the folding surface of the mouthpiece sheet, and a short cut portion is formed on the non-folded surface. And by setting the ratio a of the length of the short cut portion to the long cut portion within the above range, the holding power of the left and right perforation lines (ability to prevent the perforation line from being carelessly broken) and , It is possible to achieve both ease of separation of the perforation line when turning off the turning portion.

In the present invention, the ratio b (UL _min / CL _max ) of the length of the shortest uncut portion (UL _min ) to the longest cut portion (CL _max ) in each of the left and right perforation lines is 0.01 ≦ b It is preferable that ≦ 0.5. If the length of the unbroken part is too long, it becomes difficult to separate the perforation line, and if the length of the unbroken part is too short, the holding power of the perforation line is lowered. Therefore, by appropriately adjusting the length of the unbroken portion as in the above ratio b, it is possible to achieve both the holding force of the perforation line and the ease of separation.

In the present invention, in each of the left and right perforation lines, the sum of the lengths of the incisions _{(CL tot)} sum of the lengths of the non-cutting portion to _{(UL tot)} of the ratio _c (UL _{tot / CL} tot) is 0. It is preferable that 02 ≦ c ≦ 0.25. As described above, according to the present invention, when the left and right perforation lines extending in the direction intersecting with the pleated mountain fold line and the valley fold line are reduced, the total length of the uncut portions is reduced, so that the perforation line is removed when the turning portion is turned. It becomes easy to separate.

In the present invention, when a perforation line that connects both or either of the upper end and the lower end of the left and right perforations is formed, the shortest incision (CL _max ) with respect to the longest incision (CL _max ) in the perforation The ratio d (CL _min / CL _max ) of the length of _min ) is preferably 0.5 <d ≦ 1.0. As described above, in the left and right perforation lines, the length ratio a of the long cut portion and the short cut portion is set to 0.05 <a ≦ 0.5, and the lengths of the two are changed while the difference between the lengths is set. Make sure that there is no difference in the length of the notch. This makes it easier to separate the top, bottom, left, and right perforations.

  In the present invention, it is preferable that a label is attached to the turning portion. “Indicators” include characters, figures, symbols, irregularities, holes, or colors that can be recognized by human sight and touch. In addition, various methods such as printing, embossing, drilling, coloring, sticking a sticker and the like can be used as a method for giving the mark. In this way, by giving the mark to the turning portion, the wearer can easily recognize the turning portion of the mouthpiece sheet.

  In this invention, it is preferable that the label | marker is provided to the non-skin opposing surface of the said mouthpiece sheet | seat in the aspect which can be visually recognized from the skin facing surface side of a mouthpiece sheet | seat. For example, when the mouthpiece sheet is formed of a white non-woven fabric, the wearer attaches a sign that is transmitted through the mouthpiece sheet to the skin by applying a dark marker to the non-skin facing side of the mouthpiece sheet. Visible from the surface side. Accordingly, it is possible to present that the mouthpiece sheet can be separated from the wearer while avoiding that the ink or the like used for applying the mark directly touches the wearer's skin.

  In addition, in the case where a marker is applied using ink, it is difficult to avoid 100% of accidental licking of the ink portion, and therefore it is preferable to use edible ink. Edible ink is for printing characters on the surface of chocolate, rice crackers, etc., and all of the components contained in the ink are composed of food additives. Squid ink and gardenia (blue) are known as ink components. In particular, gardenia (blue) is highly safe and less irritating to the skin, so the ink penetrates into the non-woven skin touching surface. Safety is extremely high even when

  In the present invention, the mouthpiece sheet may further include one or a plurality of dividing perforation lines or slit lines extending in the vertical direction or the horizontal direction for dividing the turning portion. As a result, the turning portion of the mouthpiece sheet can be partially separated.

  In the present invention, the exterior sheet located in the outermost layer among the plurality of sheets has a cut-out portion in which at least three sides are defined in both or at least one of the perforation line and / or the slit line, like the mouthpiece sheet. It may be. In this way, by providing a turning portion on the exterior sheet, for example, even when some dirt adheres to the exterior sheet, the mask itself continues to be used by separating the adhered dirt part. be able to.

  In this invention, it is good also as a label | marker being provided to the range which overlaps the turning part of a mouthpiece sheet | seat to the preliminary | backup mouthpiece sheet | seat located in the non-skin opposing surface side of a mouthpiece sheet | seat. In this way, by providing a mark on the preliminary contact sheet, it can be shown to the wearer that the turned portion of the contact sheet has already been turned off. In addition, when a sign is attached to the spare mouthpiece sheet, the sign cannot be seen by the wearer from the skin-facing surface side of the mouthpiece sheet before the turning portion of the mouthpiece sheet is turned off. It is preferable to do.

  In the present invention, the mouthpiece sheet and the spare mouthpiece sheet located on the non-skin facing surface side of the mouthpiece sheet may be different in both or either of the material and the basis weight constituting the sheet. In this way, by changing the material and the basis weight between the mouthpiece sheet and the spare mouthpiece sheet, the feeling of wearing the mask can be made different before and after the turning portion of the mouthpiece sheet is cut off. In addition, by making the basis weight of the mouthpiece sheet smaller than that of the preliminary mouthpiece sheet, the weight change of the entire mask is less likely to occur even after the turning portion of the mouthpiece sheet is cut off.

  In the present invention, the mouthpiece sheet may have a different color between the inside of the turned portion and the outside thereof. For example, by making the inside of the turning portion light red or pink and keeping the outside of the range white, it is possible to make it inconspicuous even when lipstick or the like adheres to the turning portion. In addition, by color-coding inside and outside the turning portion, the wearer can easily recognize the turning portion range.

  In the present invention, a second mouthpiece sheet may be further laminated on the skin facing surface side of the mouthpiece sheet. It is preferable that at least three sides are defined in both or at least one of the perforation line and the slit line, and the second mouthpiece sheet has a cut-off portion. Thereby, the turning part can be separated over a plurality of times.

  In the present invention, the left and right perforation lines are extended portions extending in both the upper and lower directions or one of the perforation lines or slit lines connecting both the upper and lower ends of the left and right perforation lines. It is preferable to have. In this way, by providing the extension portions on the left and right perforation lines, the corners of the turning portion can be cut off cleanly.

  ADVANTAGE OF THE INVENTION According to this invention, the mask which is easy to turn a mouthpiece sheet | seat can be provided.

FIG. 1 is an external perspective view showing an example of a mask. FIG. 2 shows an example of a sheet constituting the mask main body. FIG. 3 is a plan view showing an example of a mask, and shows a state seen from the non-skin facing surface side. FIG. 4 shows an example of the mouthpiece sheet in a developed state. FIG. 5 shows an example of perforation lines formed on the mouthpiece sheet. FIG. 6 shows an example in which signs and colors are given to the turning portion of the mouthpiece sheet. FIG. 7A shows an example in which protrusions are formed on the perforation line defining the turning portion of the mouthpiece sheet, and FIG. 7B shows slit lines instead of the upper and lower perforation lines defining the turning portion. The example which formed is shown. FIG. 8 shows an example in which a perforation line for division is formed in the turning portion of the mouthpiece sheet. FIG. 9 shows an example in which a turning portion is defined by three perforations. FIG. 10A shows an example in which a second mouthpiece sheet is further laminated on the skin facing surface of the mouthpiece sheet, and FIG. 10B shows an example in which a turning portion is formed on the exterior sheet. FIG. 11 shows an example in which a mark is given to the preliminary contact sheet.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.
In the present specification, “A to B” means “A to B”.

  The present invention relates to a mask attached to the mouth, and mainly prevents harmful fine particles (sprays such as viruses) from entering the respiratory tract, or the fine particles are removed from the air by coughing or sneezing. It is used for the purpose of preventing scattering. FIG. 1 shows the appearance of a mask 10 according to the present invention, FIG. 2 shows a plurality of sheets constituting the main body 11 of the mask 10, and FIG. 3 shows a state of the mask 10 as viewed from the skin facing surface side. Show.

  As shown in FIGS. 1 to 3, the mask 10 includes a main body 11 and an ear hook 12. The main body 11 is a member for covering the mouth of the wearer, and has a structure in which sheets for filtering fine particles are laminated over a plurality of layers. In the embodiment shown in the drawings of the present application, the main body 11 has a substantially rectangular shape in plan view, but the shape of the main body 11 is not limited to the illustrated shape, and may be a circular shape, an elliptical shape, or a polygonal shape. Is also possible. The ear hook 12 is a string-like member having elasticity that is attached to the left and right side edges of the main body 11. Both ends of the ear hook 12 are fixed to the side edge of the main body 11 so as to form a loop (for example, fused). The wearer can cover his / her mouth with the main body 11 by putting the loop-shaped ear hook 12 on his / her ear. As the stretchable material constituting the ear hook 12, for example, a rubber yarn and cotton unwoven band, a resin filament unwoven net, a stretchable nonwoven fabric, or the like can be used.

  As shown in FIG. 2, the main body 11 has a structure in which a plurality of sheets are stacked in the thickness direction. In the example shown in FIG. 2, the main body 11 is composed of five layers of sheets, but it is sufficient that at least two layers of sheets are provided. As each sheet which comprises the main-body part 11, the well-known sheet material used as a general mask material can be used. For example, examples of the sheet include non-woven fabric, gauze, paper, and a moisture-permeable resin sheet. Non-woven fabrics include, for example, one or more of polyester fibers, polypropylene fibers, rayon fibers, nylon fibers, acetate fibers, wool fibers, cotton fibers, urethane fibers, and polyethylene fibers. A combination of these can be used.

  In the structural example shown in FIG. 2, when each sheet constituting the main body 11 is divided by function, the mouthpiece sheet 21, the spare mouthpiece sheet 22, the shape maintaining sheet 23, and the filter sheet 24 are arranged in order from the wearer's skin. , And the exterior sheet 25 are laminated.

The mouthpiece sheet 21 is a sheet that directly contacts the wearer's mouth. The mouthpiece sheet 21 is preferably formed of a nonwoven fabric. As a nonwoven fabric which comprises the mouthpiece sheet | seat 21, a spun bond nonwoven fabric, a point bond nonwoven fabric, a spunlace nonwoven fabric, an air through nonwoven fabric etc. can be mentioned, for example. Basis weight of the mouth contact sheet 21, for example, is preferably 10 to 50 g / ^{m 2,} and particularly preferably 15 to 40 g / ^{m 2.} Moreover, it is preferable that the thickness of the mouthpiece sheet | seat 21 is 100-350 micrometers, and it is especially preferable that it is 120-250 micrometers. If it does in this way, it can control that the dirt of mouthpiece sheet 21 sets off to preliminary mouthpiece sheet 22. Furthermore, the perforation line can be easily broken as necessary while maintaining the holding force of the perforation line formed on the mouthpiece sheet 21.

  Further, the skin facing surface of the mouthpiece sheet 21 may be subjected to an antifouling coating treatment for preventing adhesion of lipstick or foundation. For example, a coating agent such as fluorine resin, silicon resin, paraffin, or wax can be appropriately applied to the skin facing surface of the mouthpiece sheet 21.

  Furthermore, as shown in FIG. 2, the mouthpiece sheet 21 located in the innermost layer (the layer on the most skin-facing surface side) of the main body 11 has four vertical and horizontal sides defined by an encircling line 30. 40 is formed. In the present embodiment, the surrounding line 30 is composed of a perforated line in which uncut portions 31 and cut portions 32 are alternately formed. That is, the mouthpiece sheet 21 has a pair of left and right perforation lines 33 and 34 extending in the vertical direction, and a pair of upper and lower perforation lines 35 extending in the left and right direction so as to connect the upper and lower ends of the left and right perforation lines 33 and 34. 36 is formed, and the perimeter of the turning portion 40 is defined by these perforation lines 33 to 36. By breaking the unbroken portion 31 of each perforation line 33 to 36, the turning portion 40 is separated from the mouthpiece sheet 21, and an opening is formed in that portion. Thereby, the preliminary contact sheet 22 located on the back side of the contact sheet 21 is exposed on the surface, and the wearer's mouth comes into direct contact with the preliminary contact sheet 22. For example, when the lipstick or the like adheres to the mouthpiece sheet 21 and becomes dirty, by turning off the turning portion 40, the clean preliminary mouthpiece sheet 22 is exposed, so that it is not necessary to replace the entire mask. Thus, by making part of the mouthpiece sheet 21 detachable, the wearer can use the same mask for a long time, and can enjoy an economic merit.

  The spare mouthpiece sheet 22 is a sheet that is located on the non-skin facing surface side of the mouthpiece sheet 21 and is in direct contact with the wearer's mouth after the turning portion 40 of the mouthpiece sheet 21 is cut off. The preliminary contact sheet 22 is made of the same sheet material as the contact sheet 21 and preferably has the same basis weight. The equal basis weight means that the basis weight of the preliminary contact sheet 22 is within a range of ± 105% with respect to the basis weight of the mouthpiece sheet 21. However, in order to change the touch and function of the mouthpiece sheet 21 and the spare mouthpiece sheet 22, different coating materials are used for the mouthpiece sheet 21 and the spare mouthpiece sheet 22, or the coating is applied. It is also possible to use different agents.

  The shape maintaining sheet 23 is a sheet for maintaining the three-dimensional shape of the main body 11. The shape maintaining sheet 23 is preferably a mesh sheet made of resin. By providing the main body 11 with the shape maintaining sheet 23, a three-dimensional shape formed after unfolding a pleat described later can be easily maintained for a long time.

  The filter sheet 24 is a sheet having a function of collecting dust, bacteria, viruses, pollen and the like. The filter sheet 24 may be a sheet of resin or the like on which a substance having a collecting function is adsorbed, or may be a non-woven sheet having a collecting function.

  The exterior sheet 25 is a sheet located in the outermost layer (the layer closest to the non-skin facing surface) of the main body 11. As the exterior sheet 25, it is preferable to use a nonwoven fabric having a glossy surface. Examples of the nonwoven fabric include a spunbond nonwoven fabric, a point bond nonwoven fabric, a spunlace nonwoven fabric, and an air-through nonwoven fabric.

  As shown in FIG. 3, the plurality of sheets 21 to 25 described above are stacked in the thickness direction, respectively, and the corner fused portions 13 formed at the four corners and the fused wires 14 formed along the four sides. Are fused and integrated. More specifically, in the present embodiment, each sheet is formed in a rectangular shape, and the corner fused portion 13 is formed by performing hot pressing at the four corners in a state where the sheets are stacked. Further, one or a plurality of fused wires 14 are formed on each side by performing hot pressing along the four sides on the top, bottom, left, and right of the laminate of each sheet. Note that the fusion line 14 is formed by forming a plurality of fusion points on a straight line at predetermined intervals. In the example of FIG. 3, two fusion wires 14 are formed on each of the left side, the right side, and the upper side of the main body 11, and one fusion line 14 is formed on the lower side. A nose clip 15 is embedded in the gap between the two fusion wires 14 formed on the upper side of the main body 11 in parallel with the left-right direction of the main body 11. The nose clip 15 may be disposed between the sheets constituting the main body 11. The nose clip 15 is composed of a member that can be deformed to fit the shape of the wearer's nose. As the nose clip 15, for example, a resin plate-like or rod-like member is preferably used. Further, a metal tape or the like may be used as the nose clip 15.

  Further, as shown in FIG. 3, the stacking portion 40 (enclosure line 30) formed in the mouthpiece sheet 21 is formed in a region surrounded by the upper, lower, left, and right fusion wires 14. That is, the surrounding wire 30 for forming the turning portion 40 is arranged so as not to overlap the upper, lower, left, and right fusion wires 14. If the fusion line 14 and the enclosure line 30 overlap, it is difficult to break the perforation line that forms the enclosure line 30, so it is preferable that the fusion line 14 and the enclosure line 30 do not overlap.

  As shown in FIGS. 1 and 3, pleats are formed on the main body 11 at one or a plurality of locations. The pleat means a structure in which a part of the main body part 11 is folded back by alternately forming the mountain fold lines 16 and the valley fold lines 17 extending in the left-right direction of the main body part 11. The folds (mountain fold line 16 and valley fold line 17) for the pleats are formed on all of the plurality of sheets constituting the main body portion 11. Such a fold is held in shape by being joined at both end portions of the main body 11. In other words, when the mask is not worn, the folds are prevented from spreading at the joints at both ends, but when the mask is worn, the folds are unfolded in an intermediate region located between the joints at both ends. Thus, the pleat spreads up and down, and the main body 11 is developed into a three-dimensional shape.

  FIG. 4 shows the position where the pleats are formed on the main body 11 by taking the mouthpiece sheet 21 as an example. As shown in FIG. 4, the “mountain fold line 16” in the present specification is a fold for bending the main body 11 so as to be convex toward the outside (non-skin facing surface side). “17” is a fold for folding the main body 11 so as to be convex toward the outside (skin facing surface side). The mountain fold line 16 and the valley fold line 17 extend in parallel in the left-right direction of the main body 11. By forming the mountain fold line 16 and the valley fold line 17 at predetermined intervals in the vertical direction of the main body part 11, pleats are formed on the main body part 11. In the example shown in FIG. 4, four mountain fold lines 16 and four valley fold lines 17 are formed, and as a result, pleats are formed at four locations on the main body 11. In the example shown in FIG. 4, one upward pleat is formed at the top, and three downward pleats are formed below it. The “upward pleat” is a pleat in which the mountain fold line 16 faces upward as viewed from the outside (non-skin facing surface), and is formed in the order of the valley fold line 17 and the mountain fold line 16 from the top in the unfolded state shown in FIG. It is a thing. The “downward pleat” is a pleat in which the mountain fold line 16 faces downward when viewed from the outside (non-skin facing surface), and is formed in the order of the mountain fold line 16 and the valley fold line 17 from the top in the unfolded state shown in FIG. It is a thing. Thus, it is preferable to form at least one upward pleat above the main body 11 and to form a downward pleat below the upper pleat. The number of upward pleats is 1-2, preferably 1, and the number of downward pleats is 2-6, preferably 3-5.

  As shown in FIG. 4, in the state where the pleats are unfolded, the vertical length of the turning portion 40 is 60 to 95%, 70 to 93% with respect to the vertical length of the mouthpiece sheet 21. Or 80 to 90%. Moreover, it is preferable that the length of the turning part 40 in the left-right direction is 60 to 95%, 70 to 93%, or 80 to 90% with respect to the length of the mouthpiece sheet 21 in the left-right direction. As described above, the turning portion 40 is preferably formed in most of the region including the center of the mouthpiece sheet 21.

  FIG. 4 shows the relationship between the perforation line formed on the mouthpiece sheet 21 and the fold for pleats. As shown in FIG. 4, in the mouthpiece sheet 21, a region between the mountain fold line 16 and the valley fold line 17 in each pleat is a “folding surface 21 a”, and the other region is a “non-folding surface 21 b”. . As shown in FIG. 4B, the entire folding surface 21a is sandwiched between the non-folding surfaces 21b. As shown in FIG. 4A, the left and right perforation lines 33 and 34 extend in the vertical direction of the mouthpiece sheet 21, whereas the folding surface 21a (the mountain fold line 16 and the valley fold line 17) Since the mouthpiece sheet 21 extends in the left-right direction, the two intersect each other. Further, in FIG. 4A, the unbroken portion 31 in the right perforation line 34 formed on the right side of the mouthpiece sheet 21 is represented by being circled for convenience.

  As shown in FIG. 4A, in the present invention, the notched portions 31 of the left and right perforation lines 33 and 34 are not formed on the folding surface 21 a of the mouthpiece sheet 21. That is, only the cut portions 32 of the left and right perforation lines 33 and 34 are formed on the folding surface 21a, and the unbroken portion 31 of the left and right perforation lines 33 and 34 is formed only on the non-folding surface 21b. . The cut portions 32 of the left and right perforation lines 33 and 34 are formed so as to cross the folding surface 21a, and the unbroken portion 31 of the left and right perforation lines 33 and 34 is a non-folding surface adjacent to the folding surface 21a. It will be formed only on 21b. In this way, by adjusting the length and pitch of the cut portions 32 so that the unbroken portions 31 of the left and right perforation lines 33 and 34 are not positioned on the folding surface 21a of the mouthpiece sheet 21, the mouthpiece sheet 21 can be folded in a mountain. Even in the state of being folded at the line 16 and the valley fold line 17, the unbroken part 31 of the left and right perforation lines 33 and 34 can be easily broken when the turning part 40 is cut off.

  When a plurality of folding surfaces 21a are formed on the mouthpiece sheet 21, in the present invention, there is even one folding surface 21a in which the unbroken portions 31 of the left and right perforation lines 33 and 34 are not formed. Just do it. However, in this invention, when the folding surface 21a is formed in multiple numbers in the mouthpiece sheet | seat 21, it is preferable that the unbroken part 31 is not formed in all the folding surfaces 21a.

  The perforation line of the mouthpiece sheet 21 will be described in more detail with reference to FIG. FIG. 5 is an enlarged view of an example of a perforation line formed on the mouthpiece sheet 21. As shown in FIG. 5, the left and right perforation lines 33 and 34 are configured symmetrically, and the uncut portion 31 and the cut portion 32 are formed at the same length and the same pitch. In FIG. 5, the unbroken portion included in the left and right perforation lines 33 and 34 is indicated by reference numeral 31a. The left and right perforation lines 33 and 34 include a relatively long cut portion 32a and a relatively short cut portion 32b. The long cut portion 32a is formed so as to cross the folding surface 21a, and the short cut portion 32b is formed on the non-folding surface 21b located between the folding surfaces 21a.

  It is preferable that the long cut portion 32a has a length that can sufficiently cross the folding surface 21a. Specifically, the length of the long cut portion 32a is preferably 105 to 320%, more preferably 110 to 220% with respect to the length in the vertical direction of the folding surface 21a on which the long cut portion 32a is formed. It is particularly preferred. Further, the long cut portion 32a is formed at a position extending from both the upper edge and the lower edge of the folding surface 21a. By forming the long cut portion 32a having such a sufficient length on the folding surface 21a, the mouthpiece sheet 21 can be easily separated along the left and right perforation lines 33 and 34 also on the folding surface 21a.

Further, in each of the right and left of the perforation lines 33 and 34, the longest cut portion shortest cut portion to _{(CL max) (CL min)} of the length of the ratio _{a (CL} min _/ CL _max) is, 0.05 <a It is preferable that ≦ 0.5. The ratio a is particularly preferably 0.06 to 0.3 or 0.07 to 0.2. In the example shown in FIG. 5, the longest cut portion is formed at a position crossing the folding surface 21a, and the shortest cut portion is formed in the non-folding surface 21b. For example, the length of the longest cut portion is preferably 10 to 40 mm, and particularly preferably 15 to 30 mm. Moreover, it is preferable that the length of the shortest cut | notch part is 1-10 mm, and it is especially preferable that it is 1.5-5 mm.

Further, in each of the right and left of the perforation lines 33 and 34, the longest notches shortest non cutting portion to _{(CL max) (UL min)} length ratio _b (UL min _{/ CL max)} is, 0.01 ≦ It is preferable that b ≦ 0.5. The ratio b is particularly preferably 0.15 to 0.3 or 0.02 to 0.1. In the example shown in FIG. 5, the shortest unbroken portion is formed on the non-folding surface 21b located between the two folding surfaces 21a. For example, the length of the shortest unbroken part is preferably 0.5 to 2 mm, particularly preferably 0.6 to 1.2 mm. In addition, the maximum length of the uncut portion is preferably 2 mm or less, and particularly preferably 1.2 mm or less in consideration of the ease of breaking the perforation line. In addition, the minimum length of the uncut portion is preferably 0.5 mm or more, particularly preferably 1 mm or more in consideration of the perforation holding force.

Further, in each of the right and left of the perforation lines 33 and 34, the ratio _c (UL _{tot / CL} tot) of the sum of the length of the cut portion _{(CL tot)} not cut portion of the length sum of the relative _{(UL tot)} is 0 It is preferable that .02 ≦ c ≦ 0.25. The ratio c is particularly preferably 0.03 to 0.2 or 0.05 to 0.18. In the example shown in FIG. 5, arc-shaped cut portions are formed at the corners of the surrounding line 30 as will be described later. The arc-shaped cut portions are cut portions at the left and right perforation lines 33 and 34. Is not included. Therefore, the total sum (CL _tot ) is calculated without including the length of the arc-shaped cut portion.

  Further, as shown in FIG. 5, at least two or more unbroken portions 31a of the left and right perforation lines 33 and 34 are formed on the non-folding surface 21b located between the two folding surfaces 21a. Is preferred. That is, two or more unbroken portions 31a of the left perforation line 33 and two or more unbroken portions 31a of the right perforation line 34 are preferably formed on the non-folding surface 21b between the folding surfaces 21a. . In the non-folding surface 21b between the folding surfaces 21a, if the number of the unbroken portions 31a in each of the left and right perforation lines 33 and 34 is one, the retention strength of the perforation line becomes low, and the perforation line breaks carelessly There is a possibility that. Moreover, in the non-folding surface 21b between the folding surfaces 21a, it is preferable that the number of the unbroken parts 31a of the left and right perforation lines 33 and 34 is 5 or less. If the number of unbroken portions 31a is large, the perforation line may be difficult to break on the non-folding surface 21b between the folding surfaces 21a. For this reason, in the non-folding surface 21b between the folding surfaces 21a, it is appropriate that the unbroken portions 31a of the left and right perforation lines 33 and 34 are two or more and five or less.

  In the embodiment shown in FIGS. 4 and 5, upper and lower perforation lines 35 and 36 extending in the left-right direction are formed so as to connect both upper and lower ends of the left and right perforation lines 33 and 34. In FIG. 5, the unbroken part of each of the upper and lower perforation lines 35 and 36 is indicated by reference numeral 31c, and the cut part is indicated by reference numeral 32c. The uncut portions 31c and the cut portions 32c of the upper and lower perforation lines 35 and 36 are alternately formed in the left-right direction.

Further, in each of the upper and lower perforation lines 35 and 36, the longest cut portion shortest cut portion to _{(CL max) (CL min)} of the length of the ratio _{d (CL} min _/ CL _max) is, 0.5 <d It is preferable that ≦ 1.0. That is, it is preferable that there is no great difference in the length of the cut portion 32c between the upper and lower perforations. For example, in the upper and lower perforation lines 35 and 36, the length of the cut portion 32c is preferably in the range of 3 to 20 mm or 5 to 15 mm, and the ratio d may be satisfied.

Further, in each of the upper and lower perforation lines 35 and 36, the longest notches shortest non cutting portion to _{(CL max) (UL min)} of the length of the ratio _e (UL min _{/ CL max)} is, 0.03 ≦ It is preferable that e ≦ 0.5. In particular, the ratio e is preferably 0.05 to 0.3 or 0.06 to 0.2. For example, in the upper and lower perforation lines 35 and 36, the length of the shortest unbroken portion is preferably 0.5 to 2 mm, and particularly preferably 0.6 to 1.2 mm. In addition, the maximum length of the uncut portion is preferably 2 mm or less, and particularly preferably 1.2 mm or less in consideration of the ease of breaking the perforation line. In addition, the minimum length of the uncut portion is preferably 0.5 mm or more, particularly preferably 1 mm or more in consideration of the perforation holding force.

  As shown in FIGS. 4 and 5, arc portions 37 are formed at two corners above the turning portion 40 (enclosure line 30). In the present embodiment, the arc portion 37 is formed by an arc-shaped cut portion. Moreover, the arc part 37 should just be formed in at least one of the four corners of the turning part 40, and may be formed in two lower corners in addition to two upper corners. Further, the arc portion 37 may be formed by only the cut portion, or may be an arc shape formed by combining the cut portion and the uncut portion (that is, in the middle of the arc). May be provided with unbroken parts). Thus, by providing the arc portion 37 at the corner of the turning portion 40, the perforation lines 33 to 36 surrounding the turning portion 40 can be easily broken by using the arc portion 37 as a trigger. In the present specification, when the arc portion 37 is formed at the corner of the turning portion 40, the arc portion 37 is treated as being included in the upper and lower perforation lines 35 and 36.

  As shown in FIGS. 4 and 5, extending portions 32 d are formed on the left and right perforation lines 33 and 34 at two corners below the turning portion 40 (enclosure line 30). More specifically, at the two lower corners of the enclosure line 20, the cut portions 32 of the left and right perforation lines 33 and 34 intersect with the cut portions 32 of the lower perforation line 36. The cut portions 32 of the left and right perforation lines 33 and 34 extend downward beyond the cut portion 32 of the lower perforation line 36. The extended portions of the cut portions 32 of the perforation lines 33 and 34 become “extended portions” indicated by reference numeral 32d. By forming the extending portion 32d in this way, when the turning portion 40 is cut along the upper, lower, left, and right perforation lines 33 to 36, the lower two corners can be easily separated cleanly. In particular, since the turning portion 40 is often cut from the upper side toward the lower side, it is effective to form the extension portions 32d of the cut portions 32 at the two lower corners. The length of the extension part 32d should be 0.1 mm or more or 0.5 mm or more, for example, preferably 0.1 to 5 mm, 0.5 to 3 mm, and 0.8 to 1.2 mm. It is particularly preferred.

  Since the pleats are formed in the main body 11 of the mask 10, the left and right perforation lines 33 and 34 are less likely to be broken than the upper and lower perforation lines 35 and 36. As one of countermeasures, in the present invention, as described above, the unbroken portions 31 of the left and right perforation lines 33 and 34 are not positioned in the folding surface 21a of each pleat. As another countermeasure, the fiber orientation of the nonwoven fabric constituting the mouthpiece sheet 21 may be made to coincide with the extending direction of the left and right perforation lines 33 and 34. That is, as the mouthpiece sheet 21, a nonwoven fabric having a fiber orientation along the vertical direction may be adopted. Since the nonwoven fabric has the property of being easily torn along the direction parallel to the fiber orientation, the extending direction of the left and right perforation lines 33 and 34 coincides with the fiber orientation direction of the nonwoven fabric. Can be easily broken.

  As another countermeasure, the basis weight or thickness of the area located around the left and right perforation lines 33 and 34 of the nonwoven fabric constituting the mouthpiece sheet 21 is made smaller than the basis weight or thickness of the other areas. It is good as well. The area located around the left and right perforation lines 33 and 34 is, for example, an area within 0.5 to 3 mm from the perforation line. By reducing the basis weight or thickness of this region, the left and right perforation lines 33 and 34 can be easily broken.

  FIG. 6 shows an example in which a label is given to the turning portion 40 in order to indicate to the wearer that the turning portion 40 of the mouthpiece sheet 21 can be cut off. “Indicators” include characters, figures, symbols, irregularities, holes, or colors that can be recognized by human sight and touch. In addition, various methods such as printing, embossing, drilling, coloring, sticking a sticker and the like can be used as a method for giving the mark.

  In the example shown to Fig.6 (a), the arrow-shaped label | marker 41 is provided in the turning part 40 of the mouthpiece sheet | seat 21 by embossing. Embossing may be performed from the skin facing surface side of the mouthpiece sheet 21 or from the non-skin facing surface side. The arrow mark 41 is preferably applied in the vicinity of the arc portion 37 that triggers the turning portion 40 to be cut off, and the direction of the arrow indicates the pulling direction when the turning portion 40 is cut off.

  In the example shown in FIG. 6B, an example in which an arrow-like marker 42 is printed on the non-skin facing surface in the turning portion 40 of the mouthpiece sheet 21 is shown. When printing the sign 42 on the mouthpiece sheet 21, it is preferable to print on the non-skin facing surface of the mouthpiece sheet 21 so that the ink does not directly touch the wearer's skin. However, since the printed sign 42 needs to be visible to the wearer, the sign 42 is preferably printed in a manner that is visible from the skin-to-rear side of the mouthpiece sheet 21. For example, the sign 42 may be printed using dark ink that is visible through the mouthpiece sheet 21. Further, the basis weight of the mouthpiece sheet 21 may be reduced so that the sign 42 is easily visible. However, the sign 42 can be printed on the skin facing surface of the mouthpiece sheet 21.

  Moreover, when the label | marker 42 is provided to the mouthpiece sheet | seat 21 using an ink, it is preferable to use an edible ink. Edible ink is composed of raw materials according to the Food Sanitation Law and the standards for the use of food additives. As edible ink, for example, one or a mixture of two or more natural ingredients such as gardenia, melanin (squid ink), anthocyanin, monascus, red koji, curcumin, cochineal, chlorophyll, polyphenol can be used. Propylene glycol, glycerin, ethyl alcohol, water, or the like can be used as the ink solvent.

  In the example shown in FIG. 6C, the inside of the turning portion 40 of the mouthpiece sheet 21 and the other region are color-coded. Specifically, the inside of the turning portion 40 of the mouthpiece sheet 21 is colored with a color different from the other areas. Note that “different colors” means that at least one of brightness, hue, and saturation is different. Furthermore, not only colors with different hues but also colors with the same hue, but with intentionally different saturation or lightness shall be “different colors”. For example, when the mouthpiece sheet 21 constituting the mask 10 is white, the turning portion 40 of the mouthpiece sheet 21 may be entirely or partially made red, blue, green, pink, or gray. Thus, coloring the inside of the turning part 40 makes it easier for the wearer to recognize the position of the turning part 40. Further, for example, by coloring the inside of the turning portion 40 with red or pink having a similar color to the lipstick, even when the lipstick adheres to the skin facing surface of the turning portion 40, the color can be made inconspicuous. .

  FIG. 7 shows a modification of the surrounding line 30 that surrounds the turning portion 40. In the example shown in FIG. 7A, a protruding portion 38 that is curved or refracted so as to partially protrude toward the outside of the turning portion 40 is formed at a part of the upper perforation line 35. The protruding portion 38 functions as a tab for holding when turning the turning portion 40. As shown in FIG. 7A, the protruding portion 38 is formed as a part of the upper perforation line 35, and the protruding portion 38 itself is preferably formed only by the cut portion. However, an unbroken portion may be provided in the middle of the protruding portion 38. In the example shown in FIG. 7A, the protruding portion 38 is formed on the upper perforation line 35. In addition, the protruding portion 38 is formed on the left and right perforation lines 33, 34 and the lower perforation line 36. Is also possible.

  FIG. 7B shows an example in which the surrounding line 30 surrounding the turning portion 40 is formed by left and right perforation lines 33 and 34 and upper and lower slit lines 35 and 36 connecting the upper and lower ends thereof. A slit line is a cut having no unbroken part. In this way, in the present invention, as shown in the drawing, the left and right sides of the enclosure line 30 need only be formed by the perforation lines 33 and 34, and the upper and lower sides of the enclosure line 30 are replaced by slit lines instead of the perforation lines. It is also possible to adopt.

  FIG. 8 shows an example in which a dividing line 39 is formed in the turning part 40. In the example shown in FIG. 8A, the dividing line 39 is composed of a perforation line extending in the vertical direction from the upper perforation line 35 to the lower perforation line 36. Thereby, the turning part 40 can be divided into two parts left and right by dividing the turning part 40 along the dividing line 39. When the dividing line 39 is a perforated line extending in the vertical direction, it is preferable that the dividing line 39 does not have an unbroken portion in the folding surface 21a, like the left and right perforated lines 33 and 34. . Further, the dividing line 39 extending in the vertical direction can also be formed by a slit line.

  In the example shown in FIG. 8B, the dividing line 39 is composed of a perforation line extending in the left-right direction from the left perforation line 33 to the right perforation line 34. Thereby, the turning part 40 can be divided into two parts vertically by dividing the turning part 40 along the dividing line 39. Moreover, the dividing line 39 extending in the left-right direction can also be configured by a slit line.

  Although not shown, a plurality of dividing lines 39 may be formed in the turning portion 40. Further, both the dividing line 39 extending in the vertical direction and the dividing line 39 extending in the left-right direction can be formed in the turning portion 40. Furthermore, the extending direction of the dividing line 39 is not limited to the left-right direction and the up-down direction, and may be an oblique direction, or may be a broken line or a curve having a refraction point or a bending point at one or a plurality of locations.

  FIG. 9 shows an example in which the turning portion 40 is not completely separated from the mouthpiece sheet 21 and remains connected to the mouthpiece sheet 21 even after the turning portion 40 is turned. More specifically, the turning portion 40 has three sides defined by left and right perforation lines 33 and 34 and an upper perforation line 35. That is, no perforation line or slit line is formed at the lower edge of the turning part 40, and the turning part 40 is always connected to the mouthpiece sheet 21 at this lower edge. For this reason, as shown in FIG. 9B, even when the perforation lines 33, 34, 35 are cut off, the turning portion 40 remains without being cut off from the mouthpiece sheet 21. Thereby, the clean preliminary | backup contact sheet 22 can be exposed, avoiding turning part 40 becoming waste (garbage).

  FIG. 10 shows an example in which the number of turning portions 40 is increased. In the example of Fig.10 (a), the 2nd mouthpiece sheet | seat 26 is further piled up on the skin opposing surface of the mouthpiece sheet | seat 21 (1st mouthpiece sheet | seat) mentioned above. Then, the turning portion 40 is also formed on the second mouthpiece sheet 26. In addition, since the turning part 40 formed in the 2nd mouthpiece sheet | seat 26 can employ | adopt the same structure as the turning part 40 of the 1st mouthpiece sheet | seat 21 mentioned above, description about the detail is abbreviate | omitted. . The second mouthpiece sheet 26 may be made of the same sheet material as that of the first mouthpiece sheet 21.

  As shown in FIG. 10A, when the second mouthpiece sheet 26 is stacked on the first mouthpiece sheet 21, the turning portion 40 of the second mouthpiece sheet 26 is the first mouthpiece sheet 21. It is preferable to make the area larger than the turning portion 40. That is, the turning portion 40 of the first mouthpiece sheet 21 may be within the range of the turning portion 40 of the second mouthpiece sheet 26. Thereby, after cutting off the turning part 40 of the 2nd mouthpiece sheet | seat 26, it becomes easy to perform the operation | work which cuts off the turning part 40 of the 1st mouthpiece sheet | seat 21. FIG.

  In the example of FIG. 10B, the turning portion 40 is also formed on the exterior sheet 25 located on the outermost layer of the main body portion 11 of the mask 10. Thus, in addition to the mouthpiece sheet 21 located in the innermost layer, the turning portion 40 can be formed also in the exterior sheet 25 located in the outermost layer. In addition, since the turning part 40 formed in the exterior sheet | seat 25 can employ | adopt the structure similar to the turning part 40 of the mouthpiece sheet | seat 21 mentioned above, the description about the detail is abbreviate | omitted.

  FIG. 11 shows an example in which a mark 51 is given to the preliminary contact sheet 22 located on the non-skin facing surface side of the contact sheet 21. Specifically, a mark 51 is given to a range that overlaps the turning portion 40 of the mouthpiece sheet 21 in the preliminary mouthpiece sheet 22. For this reason, if the turning part 40 of the mouthpiece sheet | seat 21 is cut | disconnected, the range containing the label | marker 51 of the preliminary | backup mouthpiece sheet | seat 22 will express on a skin opposing surface. In this way, by providing the mark 51 to the preliminary contact sheet 22, the wearer can easily recognize that the turning portion 40 of the contact sheet 21 has been turned. In the example shown in FIG. 11, a symbol is given as the sign 51, but it may be a character or a figure. Further, the entire preliminary contact sheet 22 or a part thereof (a range overlapping with the turning portion 40) may exhibit a color different from that of the contact sheet 21.

  In addition, when the sign 51 is given to the preliminary mouthpiece sheet 22, the wearer puts the sign 51 from the skin facing surface side of the mouthpiece sheet 21 before the turning portion 40 of the mouthpiece sheet 21 is cut off. It is preferable that the label | marker 51 is provided in the aspect which cannot be visually recognized. For example, by providing the sign 51 to the preliminary contact sheet 22 by embossing, the sign 51 is difficult to be seen through the contact sheet 21. Thereby, a wearer becomes easy to discriminate | determine whether it is after the turning part 40 is cut off.

  Further, the mouthpiece sheet 21 and the spare mouthpiece sheet 22 may be different in both or either of the material and the basis weight constituting each sheet. For example, non-woven fabrics having different basis weights and thicknesses can be used for the mouthpiece sheet 21 and the spare mouthpiece sheet 22. Moreover, you may vary the kind of nonwoven fabric with the mouthpiece sheet | seat 21 and the spare mouthpiece sheet | seat 22. FIG. Accordingly, the mouthpiece sheet 21 and the spare mouthpiece sheet 22 can have different functions. For example, a non-woven fabric with a soft touch is used for the mouthpiece sheet 21, and a non-woven fabric with a smooth touch is used for the spare mouthpiece sheet 22. For example, a sheet to be brought into contact with the mouth according to the wearer's preference is selected. It is also possible.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention can be suitably used in the mask manufacturing industry.

DESCRIPTION OF SYMBOLS 10 ... Mask 11 ... Main-body part 12 ... Ear-hanging part 13 ... Corner fusion part 14 ... Fusion wire 15 ... Nose clip 16 ... Mountain fold line 17 ... Valley fold line 21 ... Mating sheet 21a ... Folding surface 21b ... Non-folding surface 22 ... Preliminary mouthpiece sheet 23 ... Shape maintaining sheet 24 ... Filter sheet 25 ... Exterior sheet 26 ... Second mouthpiece sheet 30 ... Enclosure 31 ... Unbroken part 31a ... Left and right unbroken part 31c ... Upper and lower unbroken part 32 ... cut portion 32a ... long cut portion 32b ... short cut portion 32c ... upper and lower cut portions 32d ... extension portion 33 ... left perforation line 34 ... right perforation line 35 ... upper perforation line (upper slit line)
36 ... Lower perforation line (lower slit line) 37 ... Arc part 38 ... Projection part 39 ... Dividing line 40 ... Turning part 41 ... Embossed sign 42 ... Printed sign 51 ... Sign

Claims (18)

A mask comprising a main body part in which a plurality of sheets are laminated, and pleats including a mountain fold line and a valley fold line extending in the left-right direction on the main body part,
Of the plurality of sheets, the mouthpiece sheet that is in contact with the wearer's mouth is a perforation line or slit line that connects the left and right perforation lines extending in the vertical direction and / or the upper and lower ends of the left and right perforation lines. And at least three sides are defined and have a punched portion,
The left and right perforation lines include at least one portion where no uncut portion is formed on a folding surface between a mountain fold line and a valley fold line in the pleat. The mask according to claim 1, wherein the left and right perforation lines are formed such that a cut portion crosses the folding surface and an uncut portion is formed on a non-folding surface adjacent to the folding surface. The main body has a fusion line in which the plurality of sheets are fused along the four sides of the top, bottom, left, and right.
The mask according to claim 1, wherein the turning portion is formed in a region surrounded by the fusion line. The mask according to any one of claims 1 to 3, wherein at least one of the four corners of the turning portion is formed in an arc shape. 5. The ratio a of the length of the shortest cut portion to the longest cut portion in each of the left and right perforation lines is 0.05 <a ≦ 0.5. 5. mask. The ratio b of the length of the shortest unbroken part to the longest cut part in each of the left and right perforation lines is 0.01 ≦ b ≦ 0.5. Mask of description. The ratio c of the sum of the lengths of the uncut portions to the sum of the lengths of the cut portions in each of the left and right perforation lines is 0.02 ≦ c ≦ 0.25. The mask of crab. In the perforation line connecting the upper end and / or the lower end of the left and right perforation lines, the ratio d of the length of the shortest cut portion to the longest cut portion is 0.5 <d ≦ 1.0. Item 6. The mask according to Item 5. The mask according to any one of claims 1 to 8, wherein a label is attached to the turning portion. The mask according to claim 9, wherein the mark is provided on a non-skin facing surface of the mouthpiece sheet in a form that is visible from the skin facing surface side of the mouthpiece sheet. 11. The mask according to claim 1, wherein the perforation line or the slit line includes a protruding part that is curved or refracted so as to partially protrude outward of the turning part. The mask according to any one of claims 1 to 11, wherein the mouthpiece sheet further includes one or a plurality of dividing perforation lines or slit lines extending in a vertical direction or a horizontal direction for dividing the turning portion. . The exterior sheet located in the outermost layer among the plurality of sheets has at least three sides defined in both or at least one of the perforation line and the slit line, and has a cut-off portion. The mask described. The mask according to any one of claims 1 to 13, wherein a mark is provided in a range that overlaps the turning portion on the preliminary contact sheet positioned on the non-skin facing surface side of the contact sheet. The said mouthpiece sheet | seat and the preliminary | backup mouthpiece sheet | seat located in the non-skin opposing surface side of the said mouthpiece sheet | seat differ in the raw material which comprises a sheet | seat, and a fabric weight or any one of them. The mask described in 1. The mask according to any one of claims 1 to 15, wherein the mouthpiece sheet is different in color between the inside of the turned portion and the outside thereof. A second mouthpiece sheet is further laminated on the skin facing surface side of the mouthpiece sheet;
The mask according to any one of claims 1 to 16, wherein the second mouthpiece sheet has a cut-off portion in which at least three sides are defined in both or at least one of a perforation line and a slit line. The left and right perforation lines have an extending portion that extends in both the upper and lower directions or any one of the perforation lines or slit lines connecting the upper end and / or the lower end of the left and right perforation lines. Item 10. The mask according to Item 1.

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