JP2019183341A - Production method of sheet-state mask - Google Patents

Abstract

To efficiently and continuously produce a three-dimensional and small sized sheet-state mask.SOLUTION: There is provided a production method of a sheet-state mask 1 on which a pair of ear hook members 3, 3 are arranged on an inner surface side of a mask body 2 which is folded into half. The production method comprises: a folding step for folding a mask body continuum 20 to which the ear hook members 3 are jointed into half at a center part of a width direction Y for forming a folded mask continuum 22; a twisting step for twisting the folded mask continuum 22 while transporting the same around a shaft in which a transport direction X is an axial direction of twisting; and a cutting/dividing step for, after the twisting step, cutting the folded mask continuum 22 for intermittently forming the folded sheet-state masks 1. The production method further comprises, between the folding step and the twisting step, a temporary fastening step for forming a temporary fastening part 5 for maintaining a folded state of the folded mask continuum 22.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for manufacturing a sheet-like mask in which a pair of ear hook members are arranged on the inner surface side of a mask body folded in half.

  2. Description of the Related Art Conventionally, as a mask that covers a wearer's mouth and nose, a sheet-like mask having a mask body formed of a sheet-like material such as a nonwoven fabric and a pair of ear-hook members joined to the mask body is known. . Such a sheet-like mask is formed by joining a pair of ear hooking members to the end of the mask body in the width direction by heat fusion or the like (for example, see Patent Document 1). However, the sheet-like mask described in Patent Document 1 is not a three-dimensional sheet-like mask that fits the shape of the wearer's face when worn and has a space between the mask body and the wearer's mouth.

  As a three-dimensional sheet-like mask, the present applicant has previously proposed a mask including a mask body in which a mask body that forms a three-dimensional shape when worn is folded in two (Patent Document 2).

JP 2012-217650 A JP 2017-70542 A

  The sheet-like mask described in Patent Document 2 is not a sheet-like mask that is downsized by arranging a pair of ear hook members on the inner surface side of the mask body folded in half. Therefore, Patent Documents 1 and 2 describe a manufacturing method for efficiently manufacturing a miniaturized sheet mask by arranging a pair of ear hook members on the inner surface side of a mask body folded in half. Absent.

  Accordingly, an object of the present invention is to improve the manufacturing method of a sheet-like mask, and more specifically, a miniaturized three-dimensional sheet-like mask in which a pair of ear hook members are attached to the inner surface side of a two-fold mask body. It is to provide a method that can be efficiently manufactured.

  The present invention relates to a method for manufacturing a sheet-like mask in which a pair of ear-hook members are arranged on the inner surface side of a mask body folded in half, and the pair of ear-hook members are disposed on a belt-like sheet member being conveyed. An ear-hook member joining step that is intermittently arranged in the transport direction of the sheet member and joins the sheet member and the ear-hook member at both side portions along the transport direction of the sheet member to form an ear-hook joint portion. A folding process in which the sheet member on which the ear hook joint is formed is folded in half at the center in the width direction of the sheet member to form a folded mask continuous body, and the folded mask continuous body , With the conveying direction as the axial direction of twisting, and after the twisting step, the bi-fold mask continuous body is cut and divided into individual sheet-like masks folded in half after the twisting step. Dividing process , Between the twisting step and the clamshell step has a temporary cut forming a KariTome portion to the clamshell mask continuum, there is provided a method for producing a sheet-like mask.

  According to the method for producing a sheet-like mask of the present invention, a sheet-like mask that becomes a three-dimensional shape when worn and whose form before use is small can be produced continuously and efficiently.

FIG. 1 is a perspective view showing a wearing state of a sheet-like mask manufactured by the manufacturing method of a preferred embodiment of the present invention. FIG. 2 is a plan view showing a state before use of the sheet-like mask shown in FIG. FIG. 3 is a cross-sectional view of a heating element included in the sheet-like mask shown in FIG. FIG. 4 is a schematic diagram showing all steps by a manufacturing apparatus used in the manufacturing method of a preferred embodiment of the present invention. FIG. 5 is a schematic diagram when the ear hooking member forming portion and the ear hooking member joint portion of the manufacturing apparatus shown in FIG. 4 are viewed from the side. FIG. 6 is a schematic view of the bi-fold portion, the temporary anchor formation portion, and the twist portion of the manufacturing apparatus shown in FIG. 4 when viewed from the side.

Hereinafter, the manufacturing method of the sheet-like mask of the present invention will be described with reference to the drawings, taking as an example the manufacturing method of the sheet-like mask 1 which is a preferred embodiment thereof.
The manufacturing method of the sheet-like mask 1 of the present embodiment is a manufacturing method of a mask in which a pair of ear hooking members 3 and 3 are arranged on the inner surface side of a mask body 2 folded in half. First, the sheet-like mask 1 manufactured by the manufacturing method of this embodiment will be described.

  As shown in FIGS. 1 to 2, the sheet-like mask 1 includes a pair of ear hook members 3, 3 arranged on the inner surface side of the mask body 2 folded in half, and a heating element 4 inside the mask body 2 folded in half. Is a sheet-like mask in which is arranged. As shown in FIG. 2, the sheet-like mask 1 has a pair of ear hooking members 3 and 3 fixed to the inner surface side of the mask body 2 folded in half. The mask body 2 in the folded 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 ears and worn. It has become. Such a sheet-like mask 1 has a small form before use, and the mask main body 2 has a three-dimensional shape when worn, and a space between the mask main body 2 and the wearer's mouth when worn. To improve the feeling of use.

  As shown in FIG. 1, the mask main body 2 is formed symmetrically about a fold line 25a extending in the vertical direction x1 along the wearer's nose muscles in the wearing state. As shown in FIG. 2, the mask body 2 is folded in two symmetrically with respect to the fold line 25a in a state before use, and the right side area and the left side area symmetrically arranged with respect to the fold line 25a are overlapped. Has been. As shown in FIG. 2, the mask body 2 in a state before use includes a folded side 25 on the folded side, an opening side 26 on the side that opens when worn, and the folding side 25 and the opening side 26. It has an upper edge 27 that is connected 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 before use, the folding side 25 has a length in the vertical direction x1 longer than the length in the vertical direction x1 of the opening side 26. The upper edge 27 is formed in a shape along the shape of the wearer's cheekbone or the like when the sheet-like mask 1 is worn, and is in close contact with the cheekbone. The lower edge side 28 is formed in a shape that covers the entire wearer's jaw when the sheet-like mask 1 is worn.

  As shown in FIG. 2, a folding side joining portion 24 that maintains the folded state of the mask body 2 that is folded in half is formed near the bent folding side 25. The folding side joining portion 24 is formed by joining a right side region and a left side region that are arranged symmetrically with respect to the folding line 25a in the mask body 2 folded in half. The folding side joining part 24 is a joining part formed on the folding line 25a side of the mask body 2 folded in half. The fold side joint portion 24 includes a nose side fold joint portion 24a disposed on the upper edge side 27 located above the vertical direction x1, and a jaw side fold disposed on the lower edge side 28 located below the vertical direction x1. And a joining portion 24b. Between the nose side fold joint portion 24a and the chin side fold joint portion 24b, the right side region and the left side region arranged symmetrically with respect to the fold line 25a are not joined.

  The nose side fold joint part 24a is formed along the line of the nasal muscles toward the wearer's nose when the sheet-like mask 1 is worn. The jaw side fold joint portion 24b is formed in a line shape that protrudes outward from the wearer's nose tip toward the tip of the jaw when the sheet-like mask 1 is worn.

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

  In the mask body 2 folded in half, the heating elements 4 are respectively disposed in the right region and the left region which are disposed symmetrically with respect to the folding line 25a. Each heating element 4 is formed in a sheet-like rectangular shape. The pair of heating elements 4 and 4 are arranged symmetrically with respect to the folding line 25a, and are arranged at positions where the wearer's nose is symmetrical in the wearing state.

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

  As shown in FIG. 2, the pair of ear hook members 3 and 3 are formed in a substantially rectangular shape that is long in the width direction y1. Each ear hook member 3 is arranged on the inner surface side of the mask body 2 in a state where the mask body 2 is folded in half. Each of the ear hooking members 3 is joined to the portion including the opening side 26 of the mask body 2 by the ear hooking joint portion 23 in the width direction y1. The ear hook joint 23 extends in the vertical direction x1 along the opening side edge 26 of the mask body 2 and across the upper edge 27 and the lower edge 28.

  As shown in FIG. 2, the pair of ear hook members 3 and 3 are accommodated in the mask main body 2 in a state where the mask main body 2 is folded in two and in contact with the inner surface of the top sheet 20 t of the mask main body 2. ing. Thus, since the ear hooking member 3 is accommodated in the mask body 2 folded in half, the sheet-like mask 1 before use has a compact shape. As shown in FIG. 1, the pair of ear hooking members 3 and 3 can be used by opening the mask body 2 folded in half so as to expose the topsheet 20 t when worn. Each of the ear hook members 3 is used by being folded outwardly with the joint boundary line 23a on the inner side of the ear hook joint portion 23 as an axis. Further, as shown in FIG. 2, each ear hooking 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 by the horizontal cut line 31a and the vertical cut line 31b. When the sheet-like 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-like mask 1 is worn, the mask body 2 covering the mouth from the wearer's nose is worn. It becomes a three-dimensional shape having a space between the wearer's mouth and fits the shape of the wearer's face.

  Next, the manufacturing method of the sheet-like mask of the present invention will be described with reference to FIGS. 4 and 5 by taking the manufacturing method of the sheet-like mask 1 according to the embodiment described above as an example. The manufacturing method of the sheet-like mask 1 is roughly divided into an ear-hook member forming process for forming the ear-hook member 3 and a process for forming the sheet-shaped mask 1 using the formed ear-hook member 3. FIG. 4 shows an outline of a manufacturing apparatus 100 that is preferably used in the method for manufacturing the sheet-like mask 1. FIG. 5 shows a schematic diagram when the ear hooking member forming portion 110 and the ear hooking member joint portion 130 of the manufacturing apparatus 100 shown in FIG. 4 are viewed from the side. FIG. 6 shows a schematic view when the bi-folded portion 140, the temporary anchor forming portion 150, and the twisted portion 160 of the manufacturing apparatus 100 shown in FIG. 4 are viewed from the side. In the following description, the transport direction for transporting the sheet-like mask 1 is described as the X direction, and the width direction orthogonal to the X direction is described as the Y direction.

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

  As shown in FIG. 5, the cutting part 111 includes a cutter roll 111a having a plurality of cutter blades (not shown) on the peripheral surface, and a cutter anvil roll 111b disposed to face the peripheral surface of the cutter roll 111a. I have. The cutter roll 111a has a plurality of cutter blades in a circumferential direction in a pattern (see FIG. 4) forming a pair of ear hook members 3 and 3 juxtaposed in the width direction Y. 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 material sheet 30.

  As shown in FIG. 5, the re-pitch portion 112 is arranged on the downstream side of the nip portion between the cutter roll 111a and the cutter anvil roll 111b, and is disposed opposite to the peripheral surface of the cutter anvil roll 111b. 112a. The transfer roll 112a has a higher rotational speed than the cutter anvil roll 111b and is capable of sucking and sucking the 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 hooking member forming step, as shown in FIG. 5, in the cutting part 111, first, the cutter roll 111a and the cutter anvil roll 111b are sucked by the cutter anvil roll 111b while sucking the belt-shaped base sheet 30. The pair of ears that are conveyed to the nip portion, press the cutter blade of the cutter roll 111a against the peripheral surface of the cutter anvil roll 111b, cut the base sheet 30, and are juxtaposed in the width direction Y. The hanging members 3 and 3 are formed. In addition, in the ear hook member formation process in this embodiment, the base material sheet 30 in which the horizontal cut line 31a and the vertical cut line 31b used for hooking at the time of wearing is used in advance.

  In the ear-hook member forming process in the present embodiment, in order to introduce the pair of ear-hook members 3 and 3 generated by the cut in the conveyance direction X and introduce them into the ear-hook member joining process described later, 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 between the cutter anvil roll 111b and the transfer roll 112a. It is transferred to the transfer roll 112a at the nip portion. Then, due to the difference in rotational speed between the transfer roll 112a and the cutter anvil roll 111b, the pair of ear hook members 3 and 3, and the pair of ear hook members 3 and 3 and another pair of ears adjacent to each other in the transport direction X It is conveyed with a wider space between the hanging members 3 and 3. In the ear hooking member forming step, only a pair of ear hooking members 3 and 3 are transferred to the transfer roll 112a, and a trim (not shown) formed by cutting the base sheet 30 at the cutting portion 111 is a re-pitch. The part 112 is discharged without being transferred to the transfer roll 112a.

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

  In the method for manufacturing the sheet-like mask 1, as shown in FIG. 4, an ear-hook member joining step for joining a pair of ear-hook members 3, 3 to a belt-like sheet member constituting the mask body 2 is performed. The sheet member means a single base sheet or a member including a laminate in which base sheets are laminated. In the method for manufacturing the sheet-like mask 1, the base member of the top sheet 20t is used as the sheet member. By disposing the heating element 4 between the sheet and the base sheet of the back sheet 20b, the mask body continuous body 20 having a configuration in which the heating element 4 is sandwiched between the two sheets is used. The ear hooking member bonding step is performed using the ear hooking member bonding 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 continuous body 20 as the sheet member and the ear hooking member 3 by heat fusion.

  The joining anvil roll 132 is a metal roll, and as shown in FIG. 5, is disposed 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 disposed opposite to the peripheral surface of the transfer roll 112a. The ultrasonic seal 133 is disposed to face the peripheral surface of the joining anvil roll 132 through the pair of ear hooking members 3 and 3 and the mask body continuous body 20.

  The joining anvil roll 132 is formed with a joining pattern (not shown) of a pair of ear hooking members 3 and 3 on its peripheral surface. The joining anvil roll 132 can adsorb the 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 arrow direction shown in FIG. 5 while sucking the pair of ear hook members 3 and 3. As the ultrasonic seal 133, a known ultrasonic oscillation device can be used.

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

  Next, in the method for manufacturing the sheet-like mask 1, as shown in FIGS. 4 and 6, the mask body continuous body 20 on which the ear hook joint 23 is formed is folded in two to form a two-fold mask continuous body 22. A folding process is performed. The folding process is performed using the folding unit 140 of the manufacturing apparatus 100. The bi-folding part 140 includes a bi-folding guide 141 that is a known bi-folding means, and a pair of poles 142 and 142.

  As shown in FIG. 6, the bi-fold guide 141 is formed so as to extend along the transport direction X and gradually increase in length in the thickness direction Z from the upstream side toward the downstream side, as shown in FIG. As described above, the mask body continuous body 20 is arranged in the center in the width direction Y. As the bi-fold guide 141, a conventionally known folding guide that can be used when the mask body continuous body 20 is folded can be used without particular limitation. As shown in FIG. 4, the pair of poles 142 and 142 are arranged on both side portions 20 s and 20 s along the transport direction X of the mask body continuous body 20, and the side portions 20 s come into contact with the pole 142, thereby The part 20 s is guided to bend upward in the thickness direction Z of the mask body continuous body 20.

  In the two-fold process, as shown in FIGS. 4 and 6, in the two-fold portion 140, both side portions 20 s and 20 s along the transport direction X of the mask body continuous body 20 come into contact with the pair of poles 142 and 142, The part 20s is guided to bend upward in the thickness direction Z. Then, the bifold mask 141 is formed by folding in half along the fold line 25a while forming the fold line 25a at the center in the width direction Y by the bifold guide 141 arranged at the center in the width direction Y of the mask body continuous body 20. A continuous body 22 is formed. As shown in FIG. 6, the bifold mask continuous body 22 is bent on the lower side in the thickness direction Z, and a fold line 25 a serving as the folding side 25 is formed below the thickness direction Z. The fold mask continuous body 22 has an unfolded portion 25n on the upper side in the thickness direction Z.

  Next, in the method for manufacturing the sheet-like mask 1, as shown in FIGS. 4 and 6, a temporary holding step of forming the temporary holding portion 5 on the bi-fold mask continuous body 22 is performed. The temporary holding process is performed using the temporary holding formation unit 150 of the manufacturing apparatus 100. An ultrasonic seal that oscillates an ultrasonic wave or a high-frequency seal that oscillates a high frequency can be used for the temporary anchor formation part 150. From the viewpoint of forming the temporary anchor part 5 accurately and efficiently, the ultrasonic seal 151 is used. Is used. The temporary anchor formation unit 150 includes an ultrasonic seal 151, an anvil roll 152 disposed to face the ultrasonic seal 151, and an elevating mechanism (not shown) that raises and lowers the ultrasonic seal 151 and the anvil roll 152 in the thickness direction Z. It has.

  The ultrasonic seal 151 is made of metal, and a known device can be used as the ultrasonic oscillator including the ultrasonic seal 151. The anvil roll 152 is made of metal, and seal convex portions (not shown) corresponding to the shape of the temporary holding portion 5 are intermittently arranged in the circumferential direction on the peripheral surface of the roll. The seal convex portion (not shown) is arranged at a site that becomes a disposal site 10 generated in a cutting and dividing process described later.

  In the temporary fixing step, the temporary protrusion forming unit 150 sandwiches the bi-fold mask continuous body 22 between the ultrasonic seal 151 and the anvil roll 152 as shown in FIG. 4 and FIG. 2), ultrasonic vibrations are applied to the half-folded mask continuous body 22 at the position (2) to intermittently form the temporary holding portions 5 that maintain the half-folded state of the double-folded mask continuous body 22. From the viewpoint of not damaging the sheet-like mask 1 to be manufactured, the temporary anchoring portion 5 is preferably formed at a site that becomes the disposal site 10 generated in the cutting and dividing step. Further, the temporary anchoring portion 5 is easy to maintain the half-folded state of the bi-fold mask continuous body 22 and is ultrasonically generated by an elevating mechanism (not shown) from the viewpoint of forming it in a portion that becomes the disposal portion 10 generated in the cutting and dividing step. It is preferable to adjust the positions of the seal 151 and the anvil roll 152 in the thickness direction Z so that the seal fold and the anvil roll 152 are formed on the side close to both ends of the unfolded portion 25n side of the bi-fold mask continuous body 22.

  Next, in the method for manufacturing the sheet-like mask 1, as shown in FIGS. 4 and 6, a twisting process of twisting the bi-fold mask continuous body 22 in which the temporary holding portions 5 are formed is performed. The twisting process is performed using the twisted portion 160 of the manufacturing apparatus 100. The twisted portion 160 includes a plurality of pairs of twist guide rolls 161 and 161.

  The twist guide roll 161 has a cylindrical shape made of metal. The twist guide roll 161 sandwiches the bi-fold mask continuous body 22 by a pair of twist guide rolls 161 and 161, and conveys the bi-fold mask continuous body 22 further downstream. The twisted portion 160 shown in FIG. 6 intermittently arranges a pair of twist guide rolls 161 and 161 from the upstream side to the downstream side in the transport direction X. The pair of twist guide rolls 161 u and 161 u on the most upstream side extends in the vertical direction parallel to the thickness direction Z. The pair of twist guide rolls 161 d and 161 d on the most downstream side extends in the horizontal direction parallel to the width direction Y. The pair of twist guide rolls 161 and 161 between the pair of upstream twist guide rolls 161 u and 161 u and the pair of downstream twist guide rolls 161 d and 161 d are directed from the upstream side in the transport direction X to the downstream side. Thus, it is arranged so as to gradually fall from the vertical direction to the horizontal direction.

  In the twisting process, in the twisted portion 160, as shown in FIGS. 4 and 6, the bifold mask continuous body 22 in which the temporary anchoring portion 5 is formed is provided with a plurality of pairs of twists that are intermittently arranged in the transport direction X. It is conveyed while being pinched by the guide rolls 161, 161, while being conveyed toward the pair of downstream twist guide rolls 161d, 161d extending in the horizontal direction from the pair of upstream twist guide rolls 161u, 161u extending in the vertical direction, The conveyance direction X is set as the twisting axial direction, and twisted 90 degrees around the axis. In the twisting process of the present embodiment, by twisting while transporting in this manner, the surface of the bi-fold mask continuous body 22 on which the temporary anchoring portion 5 is formed is directed from the horizontal direction to the vertical direction.

  In the manufacturing method of the sheet-like mask 1, a plurality of pairs of twist guide rolls 161 and 161 are used in the twisting process. However, a belt conveyor may be used. As an aspect of the belt conveyor, for example, an endless belt is bridged between one of a pair of upstream guide rolls extending in the vertical direction and one of a pair of downstream guide rolls extending in the horizontal direction. An embodiment in which an endless belt is bridged between the other of the pair of upstream guide rolls extending and the other of the pair of downstream guide rolls extending in the horizontal direction can be mentioned. By transporting the two-fold mask continuous body 22 while sandwiching the two-fold mask continuous body 22 between the two endless belts, the two-fold mask continuous body 22 can be twisted 90 degrees around an axis having the transport direction X as the twisting axial direction.

  Next, in the manufacturing method of the sheet-like mask 1, as shown in FIGS. 4 and 6, the folding side joining is performed by joining the parts facing each other by folding in two on the folding line 25a side of the folded mask continuous body 22. A folding side joint forming step for forming the portion 24 is performed. The folding side bonding portion forming step is performed using the folding bonding forming portion 170 of the manufacturing apparatus 100. The fold joint forming part 170 includes a heating roll (not shown) and an anvil roll (not shown) arranged to face the peripheral surface of the heating roll.

  A heating roll (not shown) has a convex portion corresponding to the shape of the fold side joint portion 24 having the nose side fold joint portion 24a and the jaw side fold joint portion 24b of the sheet-like mask 1 on the peripheral surface of the roll (see FIG. Not shown). The convex portions (not shown) are intermittently arranged in the circumferential direction on the roll peripheral surface of the heating roll. The convex portion (not shown) is preferably arranged at a position corresponding to a position not overlapping with the ear hooking member 3 and the heating element 4.

  In the fold side joining portion forming step, the folded fold mask continuous body 22 in which the temporary anchoring portion 5 is formed after the twisting step is heated in the fold joining forming portion 170 as shown in FIG. 4 and FIG. (Not shown) and the anvil roll (not shown) are introduced into the nip portion, spaced apart in the conveying direction X from the bi-fold mask continuous body 22, and do not overlap the ear hooking member 3 and the heating element 4 Then, the folding side joint 24 is formed. By forming the fold side joint 24 on the fold line 25a side of the fold mask continuous body 22, the fold folded state is maintained. The precursor of the sheet-like mask 1 is formed by forming the folding-side joining portion 24 in the bi-fold mask continuous body 22.

  Next, in the manufacturing method of the sheet-like mask 1, as shown in FIGS. 4 and 6, a cutting and dividing step of cutting the precursor of the sheet-like mask 1 and dividing it into individual sheet-like masks 1 is performed. The cutting and dividing step is performed using the cutting and dividing unit 180 of the manufacturing apparatus 100. The cutting | disconnection division | segmentation part 180 is provided with the cutter roll (not shown) and the anvil roll (not shown) opposingly arranged by the surrounding surface of this cutter roll.

  A cutter roll (not shown) has a plurality of cutter blades in a circumferential direction that follow the shape of the folded sheet-like mask 1 shown in FIG. The cutter blade is formed in a shape that partially overlaps with the folding side joining portion 24.

  In the cutting and dividing step, in the cutting and dividing unit 180, as shown in FIG. 4, the half-folded state of the bi-fold mask continuous body 22 is stabilized by the temporary holding unit 5 formed in the temporary holding step. The precursor of the mask 1 is conveyed to a nip portion between a cutter roll (not shown) and an anvil roll (not shown), and the folding side joining formed on the folding line 25a side of the bi-fold mask continuous body 22 is performed. The sheet mask 1 is cut at a position including a part of the portion 24 and is folded in half to form intermittently. The formed sheet-like mask 1 has a nose side fold joint portion 24a and a chin side fold joint portion 24b. While forming the sheet-like mask 1, the disposal site | part 10 other than the target sheet-like mask 1 is formed. The temporary holding part 5 is arranged in the formed disposal site 10. Thus, in the cutting / dividing step using the cutting / dividing part 180, the precursor of the sheet-like mask 1 is separated into the target sheet-like mask 1 and the disposal site 10 where the temporary anchoring part 5 is arranged.

  As described above, in the manufacturing method of the sheet-like mask 1 using the manufacturing apparatus 100, the half-folded state of the half-fold mask continuous body 22 is maintained between the half-fold process and the twisting process as shown in FIG. A temporary anchoring step for forming the temporary anchoring portion 5 to be cut and cut in a cutting and dividing step after a twisting step of twisting while conveying the bi-fold mask continuous body 22 on which the temporary anchoring portion 5 is formed. 5, the bi-fold mask continuous body 22 can be cut under a state where the bi-fold state of the bi-fold mask continuous body 22 is stabilized. Thereby, the miniaturized sheet-like mask 1 in which the pair of ear hooking members 3 and 3 are arranged on the inner surface side of the folded mask main body 2 can be manufactured with high accuracy and continuously.

  In the manufacturing method of the sheet-like mask 1, as shown in FIG. 4, before the ear-hook member joining step for joining the pair of ear-hook members 3, 3 to the belt-like sheet member constituting the mask body 2, A heating element arranging step of arranging the heating element 4 on the member is performed. The heating element arrangement step is performed using the heating element arrangement unit 120 of the manufacturing apparatus 100. As shown in FIG. 4, the heating element arrangement part 120 includes a heating element forming part 121 and a heating element re-pitch part 122.

  The heating element forming part 121 forms a continuous body 4a of heating elements in which a pair of heating elements 4 and 4 arranged in parallel in the width direction Y are intermittently arranged in the transport direction X. Can be used. The heating element re-pitch portion 122 conveys a pair of heating elements 4, 4 and a pair of other heating elements 4, 4 adjacent to each other in the conveying direction X of the pair of heating elements 4, 4. A known re-pitch means can be used.

  In the heating element arranging step, as shown in FIG. 4, in the heating element arranging unit 120, first, the heating element forming unit 121 applies or spreads the exothermic composition 41 on one surface of the non-breathable sheet 40b. Alternatively, the spread layer of exothermic composition 41 is covered with a breathable sheet 40t to form a pair of exothermic bodies 4a. Thereafter, the heating element continuous body 4 a is cut to form a plurality of heating elements 4 in which a pair of single-sheet heating elements 4, 4 juxtaposed in the width direction Y are intermittently arranged in the transport direction X. Thereafter, in the heating element re-pitch portion 122, the gap in the conveyance direction X between the pair of heating elements 4, 4 juxtaposed in the width direction Y and another heating element 4, 4 adjacent in the conveyance direction X is widened, and the mask It arrange | positions on the base material sheet | seat of the back surface sheet 20b which comprises the main body continuous body 20. FIG. In the heating element arranging step, the pair of heating elements 4 and 4 are arranged at positions avoiding the ear hook joint portion 23 and the temporary holding portion 5 in advance from the viewpoint of not damaging the heating element 4 in the sheet-like mask 1 to be manufactured. It is preferable.

  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 whole of the plurality of pairs of heating elements 4 and 4 arranged on the base sheet of the back sheet 20b. A belt-like mask body continuous body 20 is formed by superimposing a base material sheet of the topsheet 20t on top of each other.

  In the temporary fixing process described above, the temporary fixing forming unit 150 is configured so that, as shown in FIGS. 4 and 6, from the viewpoint of not damaging the heating element 4 in the sheet-like mask 1 to be manufactured, It is preferable to intermittently form the temporary holding portion 5 that maintains the folded state in a position that avoids the ear hook joint portion 23 and the heating element 4.

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

  The top sheet 20t and the back sheet 20b of the mask body 2 of the sheet-like mask 1 are preferably formed including heat-fusible fibers from the viewpoint of fusing the sheets together. Examples of the heat-fusible fiber 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 fiber surfaces that are hydrophilic. And polyvinyl alcohol-polypropylene composite fiber, and polyvinyl alcohol-polyester composite fiber. When using a composite fiber, any of a core-sheath type composite fiber and a side-by-side type composite fiber can be used. These heat-fusible fibers can be used alone or in admixture of two or more.

  The pair of ear hooking members 3 and 3 are preferably formed including a heat-fusible fiber from the viewpoint of fusing to the top sheet 20 t of the mask body 2. As the heat-fusible fiber, the same type as that used for the top sheet 20t and the back sheet 20b of the mask body 2 can be used.

  Moreover, it is preferable that a pair of ear hook members 3 and 3 have a stretching property. When the pair of ear hooking members 3 and 3 have stretchability, for example, a non-woven fabric having stretchability is used as the base sheet 30 of the pair of ear hooking members 3 and 3, so that the stretchability and good touch are good. From the point of view, it is preferable. As the nonwoven fabric having elasticity, a nonwoven fabric containing at least elastic fibers as constituent fibers, such as an air-through nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, and a spunlace nonwoven fabric, can be used.

  It is preferable that the air-permeable sheet 40t of the heating element is formed including a heat-sealing fiber. As the heat-fusible fiber, the same type as that used for the top sheet 20t and the back sheet 20b of the mask body 2 can be used.

  The exothermic composition 41 of the heating element 4 preferably contains an oxidizable 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. For example, one or two or more kinds selected from iron, aluminum, zinc, manganese, magnesium, and calcium are used. Examples include powders and fibers. Among these, 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 oxidizable metal particles constituting the heat generating composition 41 of the heat generating 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 capability, oxygen supply capability, and catalytic capability, and preferably has these three functions. 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 that it is easy to adsorb oxygen when wet and that moisture in the heating element 4 can be kept constant. More preferably, one kind or two or more kinds of fine powder or small granular materials selected from coconut shell charcoal, wood charcoal and peat charcoal are used. Especially, since it is easy to keep the moisture content of the heat generating body 4 in a desired range, wood charcoal is preferable.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not limited to this embodiment using the manufacturing apparatus 100. FIG. For example, in the method for manufacturing the sheet-like mask 1, the non-breathable sheet 40b is used as the back sheet of the mask body 2, but a breathable sheet may be used.

  Moreover, in this embodiment using the manufacturing apparatus 100 mentioned above, although the folding side junction part formation process which forms the folding side junction part 24 is performed after the twisting process, you may perform before the twisting process. Further, the folding side joint forming step may be omitted. Further, the fold side joint portion 24 formed in the fold side joint portion forming step has a nose side fold joint portion 24a and a chin side fold joint portion 24b, but the nose side fold joint portion 24a and the jaw side fold joint portion 24b. One of the parts 24b may be included.

  Moreover, in this embodiment using the manufacturing apparatus 100 mentioned above, although the temporary attachment part 5 formed in a temporary attachment process is formed in the site | part used as the disposal site | part 10 produced in a cutting | disconnection division process, the target sheet form You may form in a mask.

DESCRIPTION OF SYMBOLS 1 Sheet-like mask 2 Mask main body 20 Mask main body continuous body 20s Side part of mask main body continuous body 22 Bifold mask continuous body 23 Ear hook joint part 24 Fold side joint part 24a Nose side fold joint part 24b Jaw side fold joint part 25a Fold Wire 3 Ear-hook member 4 Heating element 100 Manufacturing apparatus

Claims (4)

A method of manufacturing a sheet-like mask in which a pair of ear-hook members are arranged on the inner surface side of a mask body folded in two,
A pair of the ear hook members are intermittently arranged in the transport direction of the sheet member on the belt-shaped sheet member being transported, and the sheet member and the ear hook member are disposed on both sides along the transport direction of the sheet member. And an ear hook member joining step for forming an ear hook joint portion by bonding
A folding process in which the sheet member formed with the ear hook joint is folded in half at the center in the width direction of the sheet member to form a folded mask continuous body;
A twisting step of twisting the bi-fold mask continuous body around its axis, with the transport direction as the axial direction of twisting;
After the twisting step, it is provided with a cutting and dividing step of cutting the bi-fold mask continuous body and dividing it into two folded sheet-like masks,
A method for producing a sheet-like mask, comprising a temporary holding step of forming a temporary holding portion on the bi-fold mask continuous body between the bi-folding step and the twisting step. In the cutting and dividing step, the bi-fold mask continuous body is cut so that the sheet-shaped mask and a disposal site are generated,
The method for manufacturing a sheet-like mask according to claim 1, wherein in the temporary holding step, the temporary holding portion is formed in a portion that becomes the discarding portion.   The method of manufacturing a sheet-like mask according to claim 1 or 2, wherein in the temporary holding step, the temporary holding portion is formed by ultrasonic sealing. The sheet member has a configuration in which a heating element is sandwiched between two belt-shaped sheets,
The manufacturing method of the sheet-like mask of any one of Claims 1-3 which forms the said temporary holding part in the position which avoids the said ear hooking junction part and the said heat generating body in the said temporary holding process.

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