JP7104547B2 - Manufacturing method of sheet mask - Google Patents

Description

The present invention relates to a method for manufacturing a sheet-shaped mask including a mask body folded in half.

Conventionally, as a mask covering the wearer's mouth and nose, a sheet-shaped mask having a mask body formed of a sheet-shaped material such as a non-woven fabric is known (see, for example, Patent Documents 1 and 2). The sheet-shaped masks described in Patent Documents 1 and 2 are formed by joining the mask main body at a joint portion formed substantially in the center and extending in the vertical direction, and the mask is formed symmetrically around the joint portion. Is. Such a mask becomes a three-dimensional mask in which a space is formed between the mask body and the wearer's mouth when worn, and the fit when worn is improved.

As a three-dimensional sheet-shaped mask, the applicant has previously proposed a mask provided with a double-folded mask body that forms a three-dimensional shape when worn (Patent Document 3).

Japanese Unexamined Patent Publication No. 2011-143277 Japanese Unexamined Patent Publication No. 2012-254272 Japanese Unexamined Patent Publication No. 2008-000191

The sheet-shaped masks described in Patent Documents 1 and 2 may be torn from a joint extending in the vertical direction when the mask body is worn in a three-dimensional shape. Patent Documents 1 and 2 describe that a joint portion extending in the vertical direction is formed by heat fusion. However, Patent Documents 1 and 2 do not specifically describe by what means the heat fusion is formed to increase the sealing strength of the joint portion.

Further, Reference Document 3 describes that a joint portion extending in the vertical direction is formed by welding. Then, Patent Document 3 describes that welding is formed by using an ultrasonic seal. However, Patent Document 3 does not describe any specific shape of the anvil roll used for the ultrasonic seal.

Therefore, an object of the present invention is to improve a method for manufacturing a sheet-shaped mask, and more specifically, the mask body is torn at the time of wearing from a folding side joint formed at a folding portion near the folding line of the mask body folded in half. An object of the present invention is to provide a method capable of efficiently producing a sheet-shaped mask having a difficult three-dimensional shape.

The present invention is a method for manufacturing a sheet-shaped mask including a mask body folded in half, in which a strip-shaped sheet member being transported is folded in half at a central portion in a width direction orthogonal to the transport direction and folded in half. The bi-folding step of forming the mask continuum and the bi-folding mask continuum are conveyed between the anvil roll and the energy applying portion arranged to face the peripheral surface of the anvil roll, and are opposed to each other by folding in half. The anvil roll is provided with a folding side joint forming step of fusing the parts together at a position near the folding line to form a folding side joint, and the anvil roll has irregularities having a plurality of convex portions on the peripheral surface. The present invention provides a method for manufacturing a sheet-shaped mask, which uses a mask having a pattern portion and forms the folded-side joint portion having a plurality of fused portions corresponding to the shapes of the convex portions of the concave-convex pattern portion. be.

According to the method for manufacturing a sheet-shaped mask of the present invention, a three-dimensional sheet-shaped mask that is hard to tear when worn is formed from a folding side joint formed at a folding portion near the folding line of the mask body folded in half. , Can be continuously and efficiently manufactured.

FIG. 1 is a perspective view showing a wearing state of a sheet-shaped mask according to a preferred embodiment of the present invention. FIG. 2 is a plan view showing a state before use of the sheet-shaped mask shown in FIG. FIG. 3 is a cross-sectional view of a heating element included in the sheet-shaped mask shown in FIG. FIG. 4 is a schematic view showing all the steps by the manufacturing apparatus used in the manufacturing method of the preferred embodiment of the present invention. FIG. 5 is a schematic view of the ear hook member forming portion and the ear hook member joint portion included in the manufacturing apparatus shown in FIG. 4 when viewed from the side. FIG. 6 is a schematic view of the folding joint forming portion and the cutting and dividing portion of the manufacturing apparatus shown in FIG. 4 when viewed from the side. FIG. 7 is a schematic view of the peripheral surface of the anvil roll provided with the folded joint forming portion shown in FIG. 6 when viewed in a plan view. FIG. 8 is a schematic view of an example when the nasal fusion portion forming the nasal folding joint portion of the sheet-shaped mask of the present invention is viewed in a plan view. FIG. 9 is a schematic view of an example of a plan view of the jaw-side fused portion forming the jaw-side folded joint portion of the sheet-shaped mask of the present invention.

Hereinafter, the sheet-shaped mask 1, which is a preferred embodiment of the present invention, will be described with reference to the drawings. Then, the manufacturing method of the sheet-shaped mask of the present invention will be described by taking the manufacturing method of the sheet-shaped mask 1 as an example and referring to the drawings.
First, the sheet-shaped mask 1 will be described.

As shown in FIGS. 1 and 2, the sheet-shaped mask 1 is formed inside the mask body 2 folded in half, a pair of ear hook members 3 and 3 arranged on the inner surface side thereof, and the mask body 2 folded in half. It is a sheet-like mask having an arranged heating element 4. As shown in FIG. 2, the sheet-shaped mask 1 has a pair of ear hook members 3 and 3 fixed to the inner surface side of the mask body 2 folded in half, while when worn, it is folded in half as shown in FIG. The mask body 2 in the state is opened, the pair of ear hook members 3 and 3 arranged on the inner surface side are folded outward, and the pair of folded ear hook members 3 and 3 are hung on the wearer's ear to be worn. It has become. Such a sheet-shaped mask 1 has a small shape before use, and the mask body 2 has a three-dimensional shape when worn, and there is a space between the mask body 2 and the wearer's mouth when worn. To form.

As shown in FIG. 3, the mask body 2 includes a breathable front sheet 20t arranged on the skin facing surface side of the wearer and a breathable back sheet 20b arranged on the non-skin facing surface side of the wearer. , The heating element 4 is sandwiched between the 20t and 20b. The front surface sheet 20t and the back surface sheet 20b have contours that match the contours of the mask body 2 in the worn state. The mask body 2 is formed by arranging a pair of heating elements 4 and 4 between the front surface sheet 20t and the back surface sheet 20b. The entire heating element 4 is covered with a front surface sheet 20t and a back surface sheet 20b. In the heating element 4, the breathable sheet 40t is arranged on the front surface sheet 20t side, and the non-breathable sheet 40b is arranged on the back surface sheet 20b side. The mask body 2 is folded in half so that the surface sheet 20t is on the inner surface side.

The heating element 4 is arranged on the first panel P1 and the second panel P2 symmetrically arranged on the folding line 25a, which will be described later, in the mask body 2 folded in half. Each heating element 4 is formed in a single-wafered rectangular shape. The pair of heating elements 4 and 4 are symmetrically arranged along the folding line 25a, and are arranged symmetrically with the wearer's nose in the wearing state.

As shown in FIG. 3, the heating element 4 is between the non-breathable sheet 40b arranged on the non-skin facing surface side, the breathable sheet 40t arranged on the skin facing surface side, and the sheets 40b, 40t. The exothermic composition 41 arranged in the above is provided. The heating element 4 is formed, for example, by coating or spraying the heat generating composition 41 on one surface of the non-breathable sheet 40b, and coating the coated layer of the heat generating composition 41 with the breathable sheet 40t. The exothermic composition 41 contains an oxidizable magnetic material powder, an electrolyte, water, and the like, and generates heat by utilizing the oxidation reaction of the oxidizable magnetic powder by contact with air.

As shown in FIG. 1, the mask body 2 has a fold line 25a formed by folding in half extending in the vertical direction x1 along the nose of the wearer when worn. The mask body 2 has a first panel P1 and a second panel P2 symmetrically arranged about the folding line 25a. As shown in FIG. 2, the mask main body 2 is folded in half symmetrically with respect to the fold line 25a in a state before use, and the first panel P1 and the second panel P2 symmetrically arranged along the fold line 25a are formed. It is piled up. A folding side joint portion 24 in which the first panel P1 and the second panel P2 are fused is formed at the folding portion on the folding line 25a side. As shown in FIG. 2, the mask body 2 in the state before use has a folding side 25 on the folding line 25a side, an opening side 26 on the opening side when worn, and a folding side 25 and an opening side 26. It has an upper edge 27 that connects on the upper side and extends in the width direction y1, and a lower edge 28 that connects the folding side 25 and the opening side 26 on the lower side and extends in the width direction y1. The folding side 25 extending in the vertical direction x1 has a shape curved outward in the width direction y1. In the mask main body 2 in the state before use, the length of the folding side 25 in the vertical direction x1 is longer than the length of the opening side 26 in the vertical direction x1. The upper edge 27 is formed in a shape that follows the shape of the wearer's cheekbones and the like when the sheet-shaped mask 1 is worn, and is in close contact with the cheekbones. The lower edge 28 is formed so as to cover the entire chin of the wearer when the sheet-shaped mask 1 is worn.

As shown in FIG. 2, a folding side joint portion 24 extending along the outwardly curved folding side side 25 is formed at a position near the folding line 25a extending in the vertical direction x1. The fold-side joint portion 24 is a nasal-side fold joint portion 24a arranged on the upper edge 27 side located above the vertical direction x1 and a chin-side fold arranged on the lower edge 28 side located below the vertical direction x1. It has a joint portion 24b. Between the nasal fold joint portion 24a and the chin side fold joint portion 24b, the first panel P1 and the second panel P2 symmetrically arranged along the fold line 25a are not joined.

The nasal fold joint portion 24a is formed along the line of the nasal muscle toward the tip of the nose of the wearer when the sheet-shaped mask 1 is worn. The chin-side fold joint portion 24b is formed in a line shape that is convex outward from the tip of the wearer's nose to the tip of the chin when the sheet-shaped mask 1 is worn.

The nasal fold joint portion 24a and the chin side fold joint portion 24b are each formed from a plurality of fusion portions 241 as shown in FIGS. 8 and 9, for example. The fusion portion 241 has a nasal fusion portion 241a forming the nasal fold joint portion 24a and a jaw side fusion portion 241b forming the jaw side fold joint portion 24b.

It is preferable that one area of the nasal fusion portion 241a and one area of the jaw side fusion portion 241b are different from the viewpoint of using a mask to prevent tearing from the folding side joint portion 24. It is preferable that the area of one of the maxillary fusion portions 241b is larger than the area of one of the nasal fusion portions 241a. Here, the area of one nasal fusion portion 241a is the area of the nasal fusion portion 241a having the largest area among the plurality of nasal fusion portions 241a forming the nasal folding joint portion 24a. Means. Similarly, one area of the jaw-side fusion part 241b is the area of the jaw-side fusion part 241b having the largest area among the plurality of jaw-side fusion parts 241b forming the jaw-side folding joint portion 24b. Means. Specifically, the area of one nasal fusion portion 241a is preferably 0.5 mm ² or more and 200 mm ² or less, and preferably 1.0 mm ² or more and 50 mm ² or less. The area of one of the jaw-side fused portions 241b is preferably 0.5 mm ² or more and 300 mm ² or less, and preferably 1.0 mm ² or more and 100 mm ² or less. In the nasal fold joint portion 24a, the distance between the adjacent nasal fusion portions 241a and 241a is preferably 0.3 mm or more and 2.0 mm or less, and preferably 1.0 mm or more and 1.5 mm or less. .. In the jaw-side fold joint portion 24b, the distance between the adjacent jaw-side fusion portions 241b and 241b is preferably 0.3 mm or more and 2.0 mm or less, and preferably 1.0 mm or more and 1.5 mm or less. ..

As shown in FIGS. 8 and 9, it is preferable that the extending direction of the nasal fusion portion 241a and the extending direction of the jaw fusion portion 241b are different. Here, the extending direction of the nasal fusion portion 241a is the extension direction of the nasal fusion portion 241a having the largest area among the plurality of nasal fusion portions 241a forming the nasal folding joint portion 24a. The extending direction of the nasal fusion portion 241a is defined as the extension direction of the nasal fusion portion 241a. Similarly, with respect to the extending direction of the jaw side fusion portion 241b, the jaw side fusion portion 241b having the largest area is extracted from the plurality of jaw side fusion portions 241b forming the jaw side folding joint portion 24b, and the jaw side fusion portion 241b is extracted. The extending direction of the jaw-side fused portion 241b is defined as the extending direction of the jaw-side fused portion 241b. As described above, the nasal fold joint portion 24a and the jaw side fold joint portion 24b are each formed from a plurality of fusion portions 241. If the extending direction of the mask body 2 is different from that of the sheet-shaped mask 1, when the mask body 2 has a three-dimensional shape, the folding side joint portion 24 formed at a position closer to the folding line 25a is less likely to be torn. Further, even when the sheet-shaped mask 1 is unfolded from the folded state, the folded side joint portion 24 is less likely to be torn.

In the sheet-shaped mask 1, the nasal fusion portion 241a extends in the width direction y1 orthogonal to the vertical direction x1 as shown in FIG. 8, for example. Then, the jaw-side fusional portion 241b extends in the vertical direction x1 as shown in FIG. 9, for example. As will be described later, in the sheet-shaped mask 1, the ear hook joint portion 23 is attached so that the joint boundary line 23a on the inner side of the ear hook joint portion 23 is inclined and extends, so that the wearer's ear can be worn. When the sheet-shaped mask 1 is worn by hanging on the ear hook member 3, the folding side joint portion 24 formed at a position closer to the folding line 25a is less likely to be torn. From the viewpoint of making the folded side joint portion 24 hard to tear, the nasal fusion portion 241a is orthogonal to the orientation direction of the constituent fibers of the front surface sheet 20t forming the mask body 2 and / or the orientation direction of the constituent fibers of the back surface sheet 20b. It preferably extends in the direction. From the same viewpoint, it is preferable that the jaw-side fused portion 241b extends in the orientation direction of the constituent fibers of the front surface sheet 20t forming the mask body 2 and / or in the orientation direction of the constituent fibers of the back surface sheet 20b.

As shown in FIG. 2, the pair of ear hook members 3 and 3 are formed in a substantially rectangular shape long in the width direction y1. Each ear hook member 3 is arranged on the inner surface side of the mask main body 2 in a state where the mask main body 2 is folded in half. Then, each ear hook member 3 is joined at the ear hook joint portion 23 with a portion whose outer portion 3s in the width direction y1 includes the opening side 26 of the mask main body 2. The ear hook joint 23 is formed so as to extend in the vertical direction x1 along the opening side 26 of the mask body 2 along the upper edge 27 and the lower edge 28. The ear hook joint portion 23 is formed with an inclined and extending joint boundary line 23 a on the inner side of the ear hook joint portion 23. The acute angle formed by the virtual straight line IL (see FIG. 2) extending parallel to the vertical direction x1 passing through the folding line 25a and the second virtual line IL2 (see FIG. 2) extending from the joining boundary line 23a is 1 degree or more and 20 degrees. It is preferably 5 degrees or more, and more preferably 15 degrees or less.

As shown in FIG. 2, the pair of ear hook members 3 and 3 are housed in the mask body 2 in a state where the mask body 2 is folded in half and in contact with the inner surface of the surface sheet 20t of the mask body 2. ing. Since the ear hook member 3 is housed in the mask body 2 folded in half in this way, the sheet-shaped mask 1 before use has a compact shape. As shown in FIG. 1, the pair of ear hook members 3 and 3 can be used by opening the mask body 2 folded in half so as to expose the surface sheet 20t when worn. Each ear hook member 3 is used by being folded outward around the joint boundary line 23a on the inner side of the ear hook joint portion 23. Further, as shown in FIG. 2, each ear hook member 3 has a horizontal cut line 31a extending in the width direction y1 and a vertical cut line 31b extending in the vertical direction x1. The vertical cut line 31b is connected to one end of the horizontal cut line 31a, and the horizontal cut line 31a and the vertical cut line 31b are arranged so as to form a T shape between the horizontal cut line 31a and the vertical cut line 31b. The cross break line 31a is formed on a bisector extending in the width direction y1 passing through the center of the ear hook member 3. When the sheet-shaped mask 1 is worn, the horizontal cut line 31a and the vertical cut line 31b are opened so that the wearer's ear is inserted and the ear hook member 3 is put on the ear.

As described above, when the horizontal cut line 31a and the vertical cut line 31b are opened, the wearer's ear is hung on the ear hook member 3, and the sheet-shaped mask 1 is worn, the mask body 2 that covers the wearer's nose and mouth is worn. It tends to be stable in a three-dimensional shape that has a space between it and the person's mouth, and fits the shape of the wearer's face.

Next, the method for manufacturing the sheet-shaped mask of the present invention will be described with reference to FIGS. 4 to 7 by taking the manufacturing method for the sheet-shaped mask 1 which is the above-described embodiment as an example. The method for manufacturing the sheet-shaped mask 1 is roughly divided into a step of forming an ear hook member 3 for forming the ear hook member 3 and a step of forming the sheet-shaped mask 1 using the formed ear hook member 3. FIG. 4 shows an outline of the manufacturing apparatus 100 preferably used in the method for manufacturing the sheet-shaped mask 1. FIG. 5 shows a schematic view of the ear hook member forming portion 110 and the ear hook member joint portion 130 included in the manufacturing apparatus 100 shown in FIG. 4 when viewed from the side. Further, FIG. 6 shows a schematic view of the folding joint forming portion 170 and the cutting and dividing portion 180 included in the manufacturing apparatus 100 shown in FIG. 4 when viewed from the side. In the following description, the transport direction for transporting the sheet-shaped mask 1 will be described as the X direction, and the width direction orthogonal to the X direction will be described as the Y direction.

In the method for manufacturing the sheet-shaped mask 1, as shown in FIG. 4, the pair of ear hook members 3 and 3 which are arranged in the width direction Y by cutting the band-shaped base material sheet 30 for the pair of ear hook members 3 and 3. The ear hook member forming step for forming 3 is performed. As shown in FIG. 5, the ear hook member forming step is performed using the ear hook member forming portion 110 of the manufacturing apparatus 100. The ear hook member forming portion 110 includes a cutting portion 111 and a re-pitch portion 112.

As shown in FIG. 5, the cutting portion 111 has a cutter roll 111a having a plurality of cutter blades (not shown) on the peripheral surface and an anvil roll 111b for a cutter arranged to face the peripheral surface of the cutter roll 111a. I have. The cutter roll 111a has a plurality of cutter blades having a pattern (see FIG. 4) forming a pair of ear hook members 3 and 3 juxtaposed in the width direction Y in the circumferential direction. The cutter roll 111a and the cutter anvil roll 111b rotate in the direction of the arrow shown in FIG. The cutter anvil roll 111b rotates while sucking the base sheet 30.

As shown in FIG. 5, the re-pitch portion 112 is arranged on the downstream side of the nip portion of the cutter roll 111a and the cutter anvil roll 111b, and includes a transfer roll 112a arranged to face the cutter anvil roll 111b. ing. The transfer roll 112a has a higher rotation speed than the cutter anvil roll 111b and can suck and suck a pair of ear hook members 3 and 3 cut by the cutter roll 111a. The transfer roll 112a rotates in the direction of the arrow shown in FIG. 5 while sucking the pair of cut ear hook members 3 and 3.

In the ear hook member forming step, as shown in FIG. 5, in the cutting portion 111, first, the cutter roll 111a and the cutter anvil roll 111b are sucked by the cutter anvil roll 111b while sucking the strip-shaped base material sheet 30. It is conveyed to the nip portion, and at the nip portion, the cutter blade of the cutter roll 111a is pressed against the peripheral surface of the cutter anvil roll 111b to cut the base sheet 30, and a pair of ears juxtaposed in the width direction Y. The hanging members 3 and 3 are formed. In the ear hook member forming step of the present embodiment, the base sheet 30 on which the horizontal cut line 31a and the vertical cut line 31b used for hanging the ear when worn is formed in advance is used.

In the ear hook member forming step of the present embodiment, in order to introduce the pair of ear hook members 3 and 3 generated by the cut into the ear hook member joining step described later at intervals in the transport direction X, the repitch portion 112 As shown in FIG. 5, the pair of ear hook members 3 and 3 are sucked and conveyed by the cutter anvil roll 111b, and the pair of ear hook members 3 and 3 are transferred to the cutter anvil roll 111b and the transfer roll 112a. It is delivered to the transfer roll 112a at the nip portion. Then, due to the difference in rotation speed between the transfer roll 112a and the cutter anvil roll 111b, the pair of ear hook members 3, 3 and the pair of ear hook members 3, 3 and another pair of ears adjacent to each other in the transport direction X are used. The space between the hanging members 3 and 3 is widened for transportation. In the ear hook member forming step, the trim (not shown) formed by passing only the pair of ear hook members 3 and 3 to the transfer roll 112a and cutting the base sheet 30 at the cutting portion 111 is re-pitched. The unit 112 discharges the transfer roll 112a without being delivered to the transfer roll 112a.

The above is the ear hook member forming step, in which the pair of ear hook members 3 and 3 are formed, and the pair of ear hook members 3 and 3 adjacent to each other in the transport direction X are spaced apart from each other. , 3 are sequentially introduced into the step of forming the next sheet-shaped mask 1. Hereinafter, the step of forming the sheet-shaped mask 1 will be described with reference to FIGS. 4 to 7.

In the method for manufacturing the sheet-shaped mask 1, as shown in FIG. 4, an ear-hanging member joining step of joining the pair of ear-hooking members 3 and 3 to the band-shaped sheet member constituting the mask main body 2 is performed. The sheet member means a single base sheet or a member including a laminated body in which base sheets are laminated, and in the method for manufacturing a sheet-shaped mask 1, the sheet member is a base material of a surface sheet 20t. By arranging the heating element 4 between the sheet and the base sheet of the back surface sheet 20b, the mask body continuous body 20 having a structure in which the heating element 4 is sandwiched between the two sheets is used. The ear hook member joining step is performed using the ear hook member joining portion 130 of the manufacturing apparatus 100. As shown in FIG. 5, the ear hook member joining portion 130 includes a joining anvil roll 132 and an ultrasonic seal 133. The ultrasonic seal 133 and the joining anvil roll 132 are for fixing the mask body continuum 20 which is a sheet member and the ear hook member 3 by heat fusion.

The joining anvil roll 132 is a metal roll, and as shown in FIG. 5, it is arranged on the downstream side of the nip portion between the transfer roll 112a and the cutter anvil roll 111b. The joining anvil roll 132 is arranged to face the peripheral surface of the transfer roll 112a. The ultrasonic seal 133 is arranged to face the joining anvil roll 132 via a pair of ear hook members 3, 3 and a mask body continuum 20.

A joining pattern (not shown) of a pair of ear hook members 3 and 3 is formed on the peripheral surface of the joining anvil roll 132. The joining anvil roll 132 is capable of adsorbing a pair of ear hook members 3 and 3 at the nip portion between the joining anvil roll 132 and the transfer roll 112a. The joining anvil roll 132 rotates in the direction of the arrow shown in FIG. 5 while sucking the pair of ear hook members 3 and 3. A known ultrasonic oscillator can be used for the ultrasonic seal 133.

In the ear hook member joining step, as shown in FIG. 4, the mask main body continuous body in which the outer portion 3s of the ear hook member 3 is conveyed while the mask main body continuous body 20 is being conveyed in the ear hook member joint portion 130. As shown in FIG. 5, the pair of ear hook members 3 and 3 are sucked and transported by using the joining anvil roll 132 so as to be located on both side portions 20s and 20s along the transport direction X of 20. The ear hook members 3 and 3 are intermittently arranged on the mask main body continuum 20 in the transport direction X. Here, when the pair of ear hook members 3 and 3 are conveyed to a position where they overlap on the mask body continuum 20, each side of the mask body continuum 20 is between the ultrasonic seal 133 and the joining anvil roll 132. The ear hook joint portion 23 is formed by joining the portion 20s and the outer portion 3s of each ear hook member 3. The steps of intermittently arranging the pair of ear hook members 3 and 3 on the mask body continuous body 20 and the step of forming the ear hook joint portion 23 may be simultaneous or separate steps. May be good.

Next, in the method for manufacturing the sheet-shaped mask 1, as shown in FIG. 4, a bi-folding step is performed in which the mask body continuous body 20 to which the ear hook member 3 is joined is folded in half to form the bi-fold mask continuous body 22. .. The bi-folding step is performed using the bi-folding portion 140 of the manufacturing apparatus 100. The bi-fold portion 140 includes a bi-fold guide (not shown) which is a known bi-fold means.

In the bi-folding step, as shown in FIG. 4, the ear hook member 3 was joined in the bi-fold portion 140 by a bi-fold guide (not shown) arranged at the center of the width direction Y of the mask body continuum 20. The mask main body continuum 20 is folded in half symmetrically with respect to the folding line 25a while forming the folding line 25a at the center in the width direction Y to form the bi-fold mask continuous body 22.

Next, in the method for manufacturing the sheet-shaped mask 1, as shown in FIG. 4, the folded-side joint portion 24 is fused at the folded portion near the folding line 25a to maintain the folded state. The folding side joint forming step of forming the above is performed. The folding side joint forming step is performed using the folding joint forming portion 170 of the manufacturing apparatus 100. The fold joint forming portion 170 includes an anvil roll 172 and an energy applying portion arranged to face the peripheral surface of the anvil roll 172. Examples of the energy applying unit include an ultrasonic seal that applies ultrasonic waves, a high frequency seal that applies high frequencies, and the like, and the manufacturing apparatus 100 uses the ultrasonic seal 171. The anvil roll 172 is adapted to rotate in the direction of the arrow shown in FIG.

The ultrasonic seal 171 is made of metal, and a known device can be used as the ultrasonic oscillator including the ultrasonic seal 171. The anvil roll 172 is made of metal, and has a concavo-convex pattern portion 173 having a concavo-convex pattern with a plurality of convex portions on the peripheral surface of the roll, as shown in FIG. In the concave-convex pattern portion 173, the outer peripheral shape of the top of the concave-convex pattern portion 173 corresponds to the shape of the nasal-side fold joint portion 24a with the nasal-side concave-convex pattern portion 173a and the jaw-side fold joint portion 24b. It has a pattern portion 173b. The nasal concavo-convex pattern portion 173a is arranged on the upstream side in the roll rotation direction, and the chin-side concavo-convex pattern portion 173b is arranged on the downstream side in the roll rotation direction. The nasal concavo-convex pattern portion 173a and the chin-side concavo-convex pattern portion 173b are arranged at intervals in the rotation direction of the anvil roll 172, and the concavo-convex pattern composed of the nasal-side concavo-convex pattern portion 173a and the chin-side concavo-convex pattern portion 173b. The portions 173 are arranged intermittently in the rotation direction of the anvil roll 172. The top of the convex portion forming the nasal uneven pattern portion 173a corresponds to the shape of the nasal fusion portion 241a forming the nasal folding joint portion 24a (see FIG. 8). Similarly, the top of the convex portion constituting the jaw-side concavo-convex pattern portion 173b corresponds to the shape of the jaw-side fusion portion 241b constituting the jaw-side fold joint portion 24b (see FIG. 9). It is preferable that the nasal-side uneven pattern portion 173a and the chin-side uneven pattern portion 173b are arranged at positions corresponding to positions that do not overlap with the ear hook member 3 and the heating element 4.

In the folding side joint forming step, in the folding joint forming portion 170, as shown in FIGS. 4 and 6, the formed bi-fold mask continuum 22 is inserted into the nip portion between the ultrasonic seal 171 and the anvil roll 172. Transport to. Then, the portions facing each other by folding in half are fused at a position closer to the fold line 25a, and the fold side joint portion 24 having the nasal side fold joint portion 24a and the chin side fold joint portion 24b is formed. The folding mask continuum 22 is formed at intervals in the transport direction X. The nasal-side fold joint portion 24a and the chin-side fold joint portion 24b are formed at positions that do not overlap with the ear hook member 3 and the heating element 4 arranged on the bi-fold mask continuous body 22. By forming the folding side joint portion 24 at a position closer to the folding line 25a of the bi-fold mask continuous body 22, a precursor of the sheet-shaped mask 1 in which the bi-folding state is maintained is formed.

Specifically, in the folding side joint forming step, in the folding joint forming portion 170, as shown in FIGS. 4 and 6, the bi-fold mask continuum 22 is formed between the ultrasonic seal 171 and the convex portion of the anvil roll 172. A plurality of nasal fusion portions 241a corresponding to the shape of the convex portion of the nasal concave-convex pattern portion 173a are formed by applying vibration, and the nasal folding joint portion composed of the plurality of nasal fusion portions 241a is formed. In addition to forming 24a, a plurality of jaw-side fusion portions 241b corresponding to the shape of the convex portion of the jaw-side uneven pattern portion 173b are formed, and a jaw-side folding joint portion 24b composed of the plurality of jaw-side fusion portions 241b is formed. In this way, the nasal-side fold joint portion 24a and the chin-side fold joint portion 24b are formed at two locations at intervals in the transport direction X of the bi-fold mask continuum 22. In the method for manufacturing the sheet-shaped mask 1, an anvil roll 172 having a concavo-convex pattern portion 173 having a concavo-convex pattern by a plurality of convex portions on the peripheral surface of the roll (see FIG. 7) and an ultrasonic seal 171 are used. Since the folding side joint portion 24 composed of a plurality of fusion portions 241 is formed on the folding mask continuous body 22, the three-dimensional shape sheet that is hard to tear when worn from the folding side joint portion 24 of the mask body 2 that has a three-dimensional shape when worn. The shape mask 1 can be continuously and efficiently manufactured.

In the method for manufacturing the sheet-shaped mask 1, the uneven pattern portion 173 of the anvil roll 172 includes the nasal concave-convex pattern portion 173a and the jaw-side concave-convex pattern portion 173b, as shown in FIG. Reference numeral 173a is an upstream concavo-convex pattern portion forming the nasal fold joint portion 24a on the upstream side of the transport direction X, and 173b is a downstream concavo-convex pattern portion 173b forming the jaw side fold joint portion 24b on the downstream side of the transport direction X. It is a side uneven pattern part. Here, the top of the convex portion constituting the nasal concave-convex pattern portion 173a corresponds to the shape of the nasal fusion portion 241a extending in the width direction y1 of the manufactured sheet-shaped mask 1 (see FIG. 8). The top of the convex portion forming the jaw-side concavo-convex pattern portion 173b corresponds to the shape of the jaw-side fused portion 241b extending in the vertical direction x1 of the manufactured sheet-shaped mask 1 (see FIG. 9). In this way, the extending direction of the convex portion of the nasal concave-convex pattern portion 173a and the extending direction of the convex portion of the chin-side concave-convex pattern portion 173b are different. Such a sheet-shaped mask 1 can be continuously manufactured because it is more difficult to peel off from the joint portion 24a and the jaw-side folded joint portion 24b.

In the method for manufacturing the sheet-shaped mask 1, the nasal uneven pattern portion 173a arranged on the upstream side in the roll rotation direction has, for example, a convex portion extending in the axial direction of the anvil roll 172. The convex portion forming the nasal concave-convex pattern portion 173a preferably extends in parallel along the axial direction of the anvil roll 172, but it may extend even in the axial direction. The jaw-side concavo-convex pattern portion 173b arranged on the downstream side in the roll rotation direction has, for example, a convex portion extending in the circumferential direction of the anvil roll 172. The convex portion forming the jaw-side concavo-convex pattern portion 173b preferably extends along the circumferential direction of the anvil roll 172, but it is sufficient as long as it extends in the circumferential direction. Since the nasal fold joint portion 24a and the chin side fold joint portion 24b are formed by using such anvil roll 172, the nasal fold joint portion 24a and the chin side fold joint portion of the mask body 2 which have a three-dimensional shape when worn are formed. From 24b, it becomes more difficult to peel off.

Further, as shown in FIG. 7, the anvil roll 172 has a concave-convex pattern portion 173 having a nasal-side concave-convex pattern portion 173a and a chin-side concave-convex pattern portion 173b, and an axial direction from the concave-convex pattern portion 173 in addition to the concave-convex pattern portion 173. A second uneven pattern portion 174 is provided at positions spaced apart from each other. The second uneven pattern portion 174 extends continuously in the circumferential direction of the anvil roll 172. Similar to the concave-convex pattern portion 173, the second uneven pattern portion 174 has a concave-convex pattern formed by a plurality of second convex portions 17b on the peripheral surface of the roll. Each of the second convex portions 17b extends in the same direction, and the concave-convex pattern of the second concave-convex pattern portion 174 is formed by setting the intervals between the second convex portions 17b and 17b adjacent to each other in the circumferential direction to be the same. In the folding side joint forming step using the anvil roll 172 provided with the uneven pattern portion 173 and the second concave-convex pattern portion 174, as shown in FIG. 4, the convex portion and the second convex portion 17b of the anvil roll 172 and the ultrasonic seal are sealed. A bi-fold mask continuum 22 is sandwiched between the fold mask continuum 22 and vibration is applied to form the fold side joint portion 24, and a plurality of fusions corresponding to the shape of the second convex portion 17b of the second uneven pattern portion 174. A continuous joint portion 24L in which the landing portion is intermittently arranged in the transport direction X is formed. Since the anvil roll 172 has a second uneven pattern portion 174 continuous in the circumferential direction at a position spaced axially from the concave-convex pattern portion 173 on the peripheral surface of the roll, the anvil roll 172 and the ultrasonic seal are sealed. The pressure load on the convex portion of the concave-convex pattern portion 173 when the vibration is applied by sandwiching the two-fold mask continuum 22 with the 171 is reduced. Therefore, the shape of the top of the convex portion does not easily collapse, and the sheet-shaped mask 1 can be manufactured with high accuracy. The continuous joint portion 24L is formed at a position spaced apart from the fold side joint portion 24 having the nasal side fold joint portion 24a and the chin side fold joint portion 24b in the width direction Y, and is discarded in the cutting division step described later. It is preferable that a site to be the site 10 is formed.

As shown in FIG. 7, the second uneven pattern portion 174 of the anvil roll 172 is a third virtual portion in which each of the second convex portions 17b is a center line extending from the upstream side to the downstream side in the roll rotation direction in the circumferential direction of the roll. Extends towards line IL3. Since each of the second convex portions 17b extends in such a direction, the ultrasonic seal 171 and the anvil roll 172 form the folded side joint portion 24 and the continuous joint portion 24L on the bi-fold mask continuous body 22. At that time, the sheet-shaped mask 1 can be continuously manufactured while suppressing wrinkles. From this point of view, the acute angle β formed by the third virtual line IL3 and the extending direction of the second convex portion 17b is preferably 10 degrees or more and 60 degrees or less, and more preferably 20 degrees or more and 40 degrees or less. preferable.

From the viewpoint of making the shape of the top of the convex portion difficult to collapse, the axial length of the anvil roll 172 of the concave-convex pattern portion 173 having the nasal-side concave-convex pattern portion 173a and the jaw-side concave-convex pattern portion 173b and the second concave-convex pattern portion 174. The total sum with the axial length of the anvil roll 172 is substantially the same at any position in the rotation direction of the anvil roll 172, and is preferably constant. As shown in FIG. 7, the axial length of the anvil roll 172 in the second concavo-convex pattern portion 174 is formed to be the longest in the portion where the nasal concavo-convex pattern portion 173a and the chin-side concavo-convex pattern portion 173b are not arranged. The jaw side uneven pattern portion 173b is formed to be the shortest in the portion corresponding to the downstream side in the roll rotation direction. Since the concavo-convex pattern portion 173 and the second concavo-convex pattern portion 174 are formed in such a relationship, when the bi-fold mask continuum 22 is pressed between the anvil roll 172 and the ultrasonic seal 171. The linear pressure in the roll axis direction is substantially constant, and the shape of the top of the convex portion does not easily collapse.

Next, in the method for manufacturing the sheet-shaped mask 1, as shown in FIGS. 4 and 6, a cutting and dividing step is performed in which the precursor of the sheet-shaped mask 1 is cut into a predetermined shape and divided into individual sheet-shaped masks 1. .. The cutting and dividing step is performed by using the cutting and dividing portion 180 of the manufacturing apparatus 100. The cutting division portion 180 includes a cutter roll 181 and an anvil roll 182 arranged to face the peripheral surface of the cutter roll 181.

The cutter roll 181 has a plurality of cutter blades having a pattern following the shape of the sheet-shaped mask 1 folded in half as shown in FIG. 2 in the circumferential direction. The cutter blade is formed in a shape that partially overlaps with the folding side joint portion 24.

In the cutting / dividing step, in the cutting / dividing portion 180, as shown in FIG. 4, the precursor of the sheet-shaped mask 1 is conveyed to the nip portion of the cutter roll 181 and the anvil roll 182 to form the bi-fold mask continuous body 22. The bi-folded sheet mask 1 in which the nasal side fold joint portion 24a and the chin side fold joint portion 24b are formed by cutting at a position including a part of the formed fold side fold joint portion 24 is intermittently used. At the same time, the disposal site 10 other than the target sheet-shaped mask 1 is formed. It is preferable that the formed waste portion 10 is provided with a continuous joint portion 24L formed at a position spaced apart from the folding side joint portion 24 in the width direction Y. In this way, if the precursor of the sheet-shaped mask 1 can be separated into the target sheet-shaped mask 1 and the disposal site 10 in which the continuous joining portion 24L is arranged in the cutting division portion 180, the anvil roll 172 The second concavo-convex pattern portion 174 can be arranged on the surface, and the shape of the top of the convex portion constituting the concavo-convex pattern portion 173 is less likely to collapse.

As described above, in the method for manufacturing the sheet-shaped mask 1 using the manufacturing apparatus 100, as shown in FIGS. 4, 6 and 7, a concavo-convex pattern portion having a concavo-convex pattern with a plurality of convex portions on the peripheral surface of the roll. Anvil roll 172 provided with 173 and an ultrasonic seal 171 are used to form a folded side joint portion 24 composed of a plurality of fused portions 241 on the bi-fold mask continuum 22. A three-dimensional sheet-shaped mask 1 that is hard to tear when worn can be continuously and efficiently manufactured from the folding side joint portion 24 of the mask main body 2.

In the method for manufacturing the sheet-shaped mask 1, as shown in FIG. 4, the sheet is joined before the ear hook member joining step of joining the pair of ear hook members 3 and 3 to the band-shaped sheet member constituting the mask body 2. A heating element arranging step of arranging the heating element 4 on the member is performed. The sheet member is a member in which the base material sheet of the front surface sheet 20t and the base material sheet of the back surface sheet 20b are overlapped in the method of manufacturing the sheet-shaped mask 1. Then, by arranging the heating element 4 between the two sheets, the mask body continuous body 20 having a configuration in which the heating element 4 is sandwiched between the two sheets is obtained. The heating element arranging step is performed using the heating element arranging unit 120 of the manufacturing apparatus 100. As shown in FIG. 4, the heating element arranging unit 120 includes a heating element forming unit 121 and a heating element repitching unit 122.

The heating element forming unit 121 forms a continuous body 4a of heating elements in which a pair of heating elements 4 and 4 juxtaposed in the width direction Y are intermittently arranged in the transport direction X, and is known as a heating element forming means. Can be used. The heating element re-pitch portion 122 transports the pair of heating elements 4, 4 with a wide distance between the pair of heating elements 4, 4 and another pair of heating elements 4, 4 adjacent to each other in the transport direction X of the pair of heating elements 4, 4. Therefore, a known re-pitching means can be used.

In the heating element arranging step using the heating element arranging portion 120, first, as shown in FIG. 4, the heating element forming portion 121 applies or sprays the heat generating composition 41 on one surface of the non-breathable sheet 40b, and then applies the heating element composition 41. Alternatively, the layer of the sprayed heating composition 41 is coated with a breathable sheet 40t to form a continuous body 4a of a pair of heating elements. After that, the continuous body 4a of the heating elements is cut to form a plurality of heating elements 4 in which a pair of single-wafer heating elements 4 and 4 juxtaposed in the width direction Y are intermittently arranged in the transport direction X. After that, in the heating element repitching portion 122, the distance between the pair of heating elements 4 and 4 juxtaposed in the width direction Y and the other heating elements 4 and 4 adjacent to the heating direction X is widened to widen the distance between the heating elements X and the mask. It is arranged on the base sheet of the back surface sheet 20b constituting the main body continuum 20. In the heating element arranging step, from the viewpoint of not damaging the heating element 4 in the sheet-shaped mask 1 to be manufactured, the pair of heating elements 4 and 4 are located at positions where the ear hook joint portion 23 and the folding side joint portion 24, which will be described later, are avoided in advance. It is preferable to arrange.

After the heating element arranging step, as shown in FIG. 4, on the base sheet of the back sheet 20b so as to cover the entire pair of the pair of heating elements 4 and 4 arranged on the base sheet of the back sheet 20b. A strip-shaped mask body continuum 20 can be formed by superimposing a base sheet of a surface sheet 20t on the surface sheet.

Next, the material for forming the member used for the sheet-shaped mask 1 will be described.

The front surface sheet 20t and the back surface sheet 20b of the mask body 2 of the sheet-shaped mask 1 are preferably formed containing heat-sealing fibers from the viewpoint of fusing the sheets together. Examples of the heat-sealing fibers include polyolefin fibers such as polyethylene, polypropylene and polyvinyl alcohol, polyester fibers, polyethylene-polypropylene composite fibers, polyethylene-polyester composite fibers, low melting point polyester-polyester composite fibers, and the fiber surface is hydrophilic. Examples thereof include polyvinyl alcohol-polyethylene composite fibers and polyvinyl alcohol-polyethylene composite fibers. When a composite fiber is used, either a core-sheath type composite fiber or a side-by-side type composite fiber can be used. These heat-sealing fibers can be used individually or in combination of two or more.

The pair of ear hook members 3 and 3 are preferably formed to include heat-sealing fibers from the viewpoint of being fused to the surface sheet 20t of the mask body 2. As the heat-sealing fiber, the same type of fiber as that used for the front surface sheet 20t and the back surface sheet 20b of the mask body 2 can be used.

Further, it is preferable that the pair of ear hook members 3 and 3 have elasticity. When the pair of ear hook members 3 and 3 have elasticity, for example, using a stretchable non-woven fabric as the base sheet 30 of the pair of ear hook members 3 and 3 makes it easy to stretch and feels good to the touch. It is preferable from the viewpoint of. As the non-woven fabric having elasticity, a non-woven fabric containing at least elastic fibers as a constituent fiber, for example, an air-through non-woven fabric, a spunbonded non-woven fabric, a melt-blown non-woven fabric, a spunlaced non-woven fabric, or the like can be used.

The breathable sheet 40t of the heating element is preferably formed to include heat-sealing fibers. As the heat-sealing fiber, the same type of fiber as that used for the front surface sheet 20t and the back surface sheet 20b of the mask body 2 can be used.

The heating composition 41 of the heating element 4 preferably contains an oxidizing metal, a carbon component, water, and the like. As the particles of the oxidizable metal constituting the exothermic composition 41, a metal that generates heat of oxidation reaction is used, and for example, one or more selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Examples include powder and fiber. Among them, iron is preferable from the viewpoint of handleability, safety, manufacturing cost, storage stability and stability, and iron powder is particularly preferable. Examples of the iron powder include reduced iron powder and atomized iron powder. The particle size of the particles of the metal to be oxidized constituting the heating composition 41 of the heating element 4 can be, for example, about 0.1 to 300 μm. The carbon component constituting the exothermic composition 41 has at least one function of water retention ability, oxygen supply ability, and catalytic ability, and those having these three functions are preferable. As the carbon component, for example, one or more selected from activated carbon, acetylene black, and graphite can be used. Among these, activated carbon is preferably used from the viewpoint of easily adsorbing oxygen when wet and keeping the water content in the heating element 4 constant. More preferably, one or more fine powders or small granules selected from coconut shell charcoal, wood pulverized coal and pete charcoal are used. Of these, wood pulverized coal is preferable because it is easy to keep the water content of the heating element 4 within a desired range.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the present embodiment using the manufacturing apparatus 100. For example, in the method for manufacturing the sheet-shaped mask 1, the non-breathable sheet 40b is used for the back sheet of the mask body 2, but a breathable sheet may be used.

Further, in the present embodiment using the manufacturing apparatus 100 described above, in the folding side joint forming step, an anvil roll 172 having a concavo-convex pattern portion 173 composed of a nasal concavo-convex pattern portion 173a and a chin-side concavo-convex pattern portion 173b is used. , The fold-side joint portion 24 having the nasal-side fold joint portion 24a and the chin-side fold joint portion 24b is formed on the bi-fold mask continuum 22. A roll shape having at least one of them may be used, and the shape of the convex portion of the nasal concave-convex pattern portion 173a or the shape of the convex portion of the jaw-side concave-convex pattern portion 173b is not particularly limited.

Further, in the present embodiment using the manufacturing apparatus 100 described above, in the folding side joint forming step, the anvil roll 172 having the uneven pattern portion 173 and the second uneven pattern portion 174 is used to form the bi-fold mask continuous body 22. A roll shape may be used in which the folding side joint portion 24 is formed and the continuous joint portion 24L is formed, but the second uneven pattern portion 174 is not provided.

Further, it does not have to be a sheet-shaped mask 1 in which a pair of ear hook members 3 and 3 are arranged on the inner surface side of the double-folded mask main body 2 and become small before use, and the double-folded mask main body 2 is provided. It may be a sheet mask.

1 Sheet-shaped mask 2 Mask body 20 Mask body continuous body (sheet member)
20s Side of mask body continuous body 22 Folded mask continuous body 23 Ear hook joint 24 Fold side joint 24a Nose side fold joint 24b Jaw side fold joint 241 Fusion part 24L Continuous joint 25a Fold line 3 Ear hook Member 4 Heat generator 10 Disposal site 100 Manufacturing equipment 171 Ultrasonic seal (seal part)
172 Anvil roll 173 Concavo-convex pattern part 173a Nose side concavo-convex pattern part 173b Jaw side concavo-convex pattern part 174 Second concavo-convex pattern part

Claims (9)

A method for manufacturing a sheet-shaped mask having a mask body folded in half.
A bi-folding step of folding the transported strip-shaped sheet member in half at the center in the width direction orthogonal to the transport direction to form a bi-fold mask continuum.
The bi-fold mask continuum is transported between the anvil roll and the energy applying portion arranged to face the peripheral surface of the anvil roll, and the parts facing each other by the bi-fold are brought closer to the bi-fold fold line. It is provided with a folding side joint forming step of fusing at a position to form a folding side joint.
As the anvil roll, one provided with a concavo-convex pattern portion having a plurality of convex portions on the peripheral surface is used, and the folding side joint portion having a plurality of fusion portions corresponding to the shapes of the convex portions of the concavo-convex pattern portion. Form and
In the folding side joint forming step, the folding side joints are formed at two places at intervals in the transport direction of the bi-fold mask continuum.
The anvil roll has, as the concavo-convex pattern portion, an upstream concavo-convex pattern portion that forms the folding side joint portion on the upstream side in the transport direction, and a downstream concavo-convex pattern portion that forms the folding side joint portion on the downstream side in the transport direction. Including
A method for manufacturing a sheet-shaped mask in which the extending direction of the convex portion of the upstream concavo-convex pattern portion and the extending direction of the convex portion of the downstream concavo-convex pattern portion are different . The method for manufacturing a sheet-shaped mask according to claim 1, wherein the anvil roll includes the uneven pattern portion having the convex portion extending in the axial direction of the anvil roll. The method for manufacturing a sheet-shaped mask according to claim 1, wherein the anvil roll includes the uneven pattern portion having the convex portion extending in the circumferential direction of the anvil roll. The anvil roll includes the concavo-convex pattern portion and a second concavo-convex pattern portion at a position axially spaced from the concavo-convex pattern portion, and the second concavo-convex pattern portion is continuous in the circumferential direction of the anvil roll. And extend
Any one of claims 1 to 3 in the folding side joint forming step, in which the folding side joint corresponding to the uneven pattern portion is formed and the continuous joint corresponding to the second uneven pattern portion is formed. The method for manufacturing a sheet-shaped mask according to item 1. A method for manufacturing a sheet-shaped mask having a mask body folded in half.
A bi-folding step of folding the transported strip-shaped sheet member in half at the center in the width direction orthogonal to the transport direction to form a bi-fold mask continuum.
The bi-fold mask continuum is transported between the anvil roll and the energy applying portion arranged to face the peripheral surface of the anvil roll, and the parts facing each other by the bi-fold are brought closer to the bi-fold fold line. It is provided with a folding side joint forming step of fusing at a position to form a folding side joint.
As the anvil roll, one provided with a concavo-convex pattern portion having a plurality of convex portions on the peripheral surface is used, and the folding side joint portion having a plurality of fusion portions corresponding to the shapes of the convex portions of the concavo-convex pattern portion. Form and
The anvil roll includes the concavo-convex pattern portion and a second concavo-convex pattern portion at a position axially spaced from the concavo-convex pattern portion, and the second concavo-convex pattern portion is continuous in the circumferential direction of the anvil roll. And extend
In the folding side joint forming step, the folding side joint corresponding to the uneven pattern portion is formed, and the continuous joint corresponding to the second uneven pattern portion is formed.
The sum of the axial length of the anvil roll of the uneven pattern portion and the axial length of the anvil roll of the second uneven pattern portion is substantially the same at any position in the circumferential direction of the anvil roll. A method for manufacturing a sheet-shaped mask. After the folding side joint forming step, the bi-fold mask continuum is cut into a predetermined shape to intermittently form a bi-folded sheet-shaped mask, and the sheet-shaped mask is separated into a waste portion. Equipped with a division process
The method for manufacturing a sheet-shaped mask according to claim 4 or 5 , wherein in the folding side joint forming step, the continuous joint is formed at a portion to be a waste portion. Any one of claims 1 to 6 , further comprising a heating element arranging step of arranging a heating element inside the sheet member at a position avoiding the folding side joint in advance in the pre-step of the folding step. The method for manufacturing a sheet-shaped mask according to the section. A sheet-like mask with a mask body folded in half.
The mask body has a first panel and a second panel in which a bi-fold fold line extends in the vertical direction along the wearer's nose when worn and is symmetrically arranged around the fold line. ,
On the fold line side, a fold side joint portion in which the first panel and the second panel are fused is formed.
The fold-side fold joint has a nasal-side fold joint that is arranged vertically upward and a chin-side fold joint that is arranged downward in the vertical direction.
The nasal fold joint and the chin fold joint are each formed from a plurality of fused portions.
A sheet-like mask in which the extending direction of the fused portion of the nasal-side folded joint portion and the extending direction of the fused portion of the jaw-side folded joint portion are different. The sheet according to claim 8 , wherein the fused portion of the nasal fold joint portion extends in a width direction orthogonal to the vertical direction, and the fused portion of the jaw side fold joint portion extends in the vertical direction. Shape mask.

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