JP7144177B2 - Method for manufacturing sheet mask - Google Patents

Description

TECHNICAL FIELD 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.

Conventionally, as a mask for covering the mouth and nose of a wearer, a sheet-like mask having a mask main body formed of a sheet-like material such as nonwoven fabric and a pair of ear hook members joined to the mask main body is known. . Such a sheet-like mask is formed by joining a pair of ear hook members to the width direction end portions of the mask body by heat-sealing or the like (see, for example, 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 mask, the present applicant has previously proposed a mask having a mask body that is folded in two to form a three-dimensional shape when worn (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 in which a pair of ear hook members are arranged on the inner surface side of the mask body folded in half to achieve miniaturization. Therefore, Patent Literatures 1 and 2 describe a manufacturing method for efficiently manufacturing a sheet-shaped mask that is made smaller by arranging a pair of ear hook members on the inner surface side of the mask body that has been folded in half. do not have.

Accordingly, an object of the present invention is to improve a method for manufacturing a sheet mask. More specifically, a three-dimensional sheet mask having a reduced size and a pair of ear hook members attached to the inner surface of a folded mask body is provided. An object of the present invention is to provide a method for efficient production.

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, wherein the pair of ear hook members are placed on a strip-shaped sheet member being conveyed. A step of joining ear hook members intermittently arranged in the conveying direction of the sheet member, and joining the sheet member and the ear hook member to form ear hook joint portions at both side portions along the conveying direction of the sheet member. a two-folding step of forming a two-fold mask continuous body by folding the sheet member on which the ear hook joint is formed in two at a center portion in the width direction of the sheet member, and the two-fold mask continuous body are twisted around the axis with the conveying direction as the axial direction of the twist, and after the twisting process, the double-folded mask continuous body is cut and divided into individual double-folded sheet-like masks. and a dividing step, and a temporary fastening step of forming temporary fastening portions in the double-folded mask continuous body between the two-folding step and the twisting step. .

According to the method for manufacturing a sheet-like mask of the present invention, it is possible to continuously and efficiently manufacture a sheet-like mask that has a three-dimensional shape when worn and is small in size before use.

FIG. 1 is a perspective view showing a wearing state of a sheet-like mask manufactured by a manufacturing method according to a preferred embodiment of the present invention. 2 is a plan view showing a state before use of the sheet mask shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view of a heating element included in the sheet mask shown in FIG. FIG. 4 is a schematic diagram showing all steps by a manufacturing apparatus used in a manufacturing method according to a preferred embodiment of the present invention. 5 is a schematic side view of the ear hook member forming portion and the ear hook member joint portion of the manufacturing apparatus shown in FIG. 4. FIG. FIG. 6 is a schematic side view of the double-folding portion, temporary fastening forming portion, and twisting portion of the manufacturing apparatus shown in FIG. 4 .

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

As shown in FIGS. 1 and 2, the sheet mask 1 has a pair of ear hook members 3, 3 arranged on the inner surface side of the mask body 2 folded in two, and a heating element 4 inside the mask body 2 folded in two. It is a sheet mask with As shown in FIG. 2, the sheet mask 1 has a pair of ear hook members 3, 3 fixed to the inner surface of a mask body 2 folded in two. The folded mask body 2 is opened, the pair of ear hook members 3, 3 arranged on the inner side are folded outward, and the folded pair of ear hook members 3, 3 are put on the ears of the wearer. It has become. Such a sheet-like mask 1 has a small size before use, and the mask main body 2 has a three-dimensional shape when worn. to improve usability.

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 nasal bridge of the wearer when worn. As shown in FIG. 2, the mask body 2 is folded into two symmetrically along the folding line 25a before use, and the right side area and the left side area, which are symmetrically arranged along the folding line 25a, are superimposed on each other. It is As shown in FIG. 2, the mask body 2 before use has a folding side 25 on the folded side, an opening side 26 on the side that opens when worn, 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 body 2 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 conforms to the shape of the wearer's cheekbones and the like when the sheet-like mask 1 is worn, so that it comes into close contact with the cheekbones. Further, the lower edge 28 is formed in a shape that covers the wearer's entire chin when the sheet mask 1 is worn.

As shown in FIG. 2, a fold-side joint 24 is formed near the curved fold-side edge 25 to maintain the double-folded state of the mask body 2 . The fold-side joining portion 24 is formed by joining a right side region and a left side region of the mask body 2 folded in two, which are arranged symmetrically with respect to the folding line 25a. The folding side joint portion 24 is a joint portion formed on the folding line 25a side of the mask body 2 folded in two. The fold-side joints 24 include a nose-side fold joint 24a arranged on the side of the upper edge 27 positioned above in the vertical direction x1, and a chin-side fold joint 24a arranged on the side of the lower edge 28 positioned below in the vertical direction x1. and a joint 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, which are arranged symmetrically with respect to the fold line 25a, are not joined.

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

As shown in FIG. 3, the mask body 2 includes a breathable top sheet 20t arranged on the wearer's skin facing side and a breathable back sheet 20b arranged on the wearer's non-skin facing side. , and the heating element 4 is sandwiched between them 20t and 20b. The top sheet 20t and the back sheet 20b have contours that match the contours of the mask body 2 in the worn state. The mask body 2 is formed by disposing a pair of heating elements 4, 4 between a top sheet 20t and a back sheet 20b. The heating element 4 is entirely covered with the top sheet 20t and the back sheet 20b. In the heating element 4, the breathable sheet 40t is arranged on the top sheet 20t side, and the non-breathable sheet 40b is arranged on the back sheet 20b side. Also, the mask body 2 is folded in half so that the surface sheet 20t faces the inner surface.

The heating elements 4 are arranged in the right and left regions of the mask body 2 folded in two, which are arranged symmetrically with respect to the folding line 25a. Each heating element 4 is formed in a sheet rectangular shape. The pair of heating elements 4, 4 are arranged symmetrically with respect to the folding line 25a, and are arranged symmetrically with respect to the wearer's nose when worn.

As shown in FIG. 3, the heating element 4 includes a non-breathable sheet 40b arranged on the non-skin-facing side, an air-permeable sheet 40t arranged on the skin-facing side, and a space between the sheets 40b and 40t. and an exothermic composition 41 disposed in the 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 covering the coated layer of the heat generating composition 41 with the breathable sheet 40t. The heat-generating composition 41 contains oxidizable magnetic powder, electrolyte, water, etc., and generates heat by utilizing the oxidation reaction of the oxidizable magnetic powder upon contact with air.

As shown in FIG. 2, the pair of ear hook members 3, 3 are formed in a substantially rectangular shape elongated in the width direction y1. Each ear hook member 3 is arranged on the inner surface side of the mask body 2 when the mask body 2 is folded in half. An outer portion 3 s of each ear hook member 3 in the width direction y 1 is joined to a portion including the opening side 26 of the mask body 2 at an ear hook joint 23 . The ear hooking joint 23 extends along the opening side 26 of the mask body 2 along the upper edge 27 and the lower edge 28 in the vertical direction x1.

As shown in FIG. 2, the pair of ear hook members 3, 3 are housed in the mask body 2 while being in contact with the inner surface of the top sheet 20t of the mask body 2 when the mask body 2 is folded in half. ing. As described above, since the ear hook member 3 is housed in the mask body 2 folded in two, the sheet-like mask 1 before use has a compact shape. As shown in FIG. 1, the pair of ear hook members 3, 3 can be used by opening the folded mask body 2 so as to expose the surface sheet 20t. Each ear hook member 3 is used by being folded outward about the joint boundary line 23a on the inner side of the ear hook joint portion 23. As shown in FIG. 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 that the horizontal cut line 31a and the vertical cut line 31b form a T shape. When the sheet-like mask 1 is worn, the horizontal cut lines 31a and the vertical cut lines 31b are opened so that the wearer's ears are put in and the ears are hung on the ear hook members 3. As shown in FIG.

As described above, when the wearer wears the sheet-like mask 1 by opening the horizontal cut line 31a and the vertical cut line 31b and hooking the wearer's ears on the ear hook member 3, the mask body 2 covering the wearer's nose and mouth is worn. It has a three-dimensional shape with a space between it and the mouth of the wearer, and fits the shape of the wearer's face.

Next, a method for manufacturing a sheet-like mask according to the present invention will be described with reference to FIGS. The method of manufacturing the sheet mask 1 is roughly divided into a step of forming the ear hook members 3 and a step of forming the sheet mask 1 using the formed ear hook members 3 . FIG. 4 shows an outline of a manufacturing apparatus 100 preferably used in the manufacturing method of the sheet mask 1. As shown in FIG. FIG. 5 shows a schematic side view of the ear hook member forming portion 110 and the ear hook member joint portion 130 of the manufacturing apparatus 100 shown in FIG. FIG. 6 shows a schematic side view of the double-folding portion 140, the temporary fastening forming portion 150, and the twisting portion 160 of the manufacturing apparatus 100 shown in FIG. In the following description, the conveying direction in which the sheet mask 1 is conveyed is the X direction, and the width direction orthogonal to the X direction is the Y direction.

In the manufacturing method of the sheet-shaped mask 1, as shown in FIG. An ear hook member forming step for forming 3 is performed. The ear hook member forming step is performed using the ear hook member forming section 110 of the manufacturing apparatus 100, as shown in FIG. 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 unit 111 includes a cutter roll 111a having a plurality of cutter blades (not shown) on its circumferential surface, and an anvil roll 111b for cutter disposed opposite to the circumferential surface of the cutter roll 111a. I have. The cutter roll 111a has a plurality of cutter blades arranged in the circumferential direction in a pattern (see FIG. 4) forming a pair of ear hook members 3, 3 juxtaposed in the width direction Y. As shown in FIG. 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.

As shown in FIG. 5, the re-pitch portion 112 is arranged downstream of the nip portion between the cutter roll 111a and the cutter anvil roll 111b, and is arranged to face the peripheral surface of the cutter anvil roll 111b. 112a. The transfer roll 112a has a higher rotating speed than the cutter anvil roll 111b and is capable of sucking and sucking the pair of ear hook members 3, 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 3,3.

In the ear hooking member forming process, as shown in FIG. 5, in the cutting section 111, first, the cutter anvil roll 111b sucks the belt-shaped base sheet 30 while the cutter roll 111a and the cutter anvil roll 111b are separated. The substrate sheet 30 is conveyed to the nip portion, and the cutter blade of the cutter roll 111a is pressed against the peripheral surface of the cutter anvil roll 111b at the nip portion to cut the base sheet 30, thereby forming a pair of tabs juxtaposed in the width direction Y. Hanging members 3, 3 are formed. In addition, in the step of forming the ear hook member in this embodiment, the base sheet 30 is used in which the horizontal cut lines 31a and the vertical cut lines 31b, which are used for hooking the ear when worn, are formed in advance.

In the ear hook member forming step in the present embodiment, the pair of ear hook members 3, 3 produced by cutting are spaced apart in the conveying direction X and introduced into the ear hook member bonding step described later. 5, the pair of ear hook members 3, 3 are conveyed while being sucked by the cutter anvil roll 111b, and the pair of ear hook members 3, 3 are transferred between 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 rotational speed difference between the transfer roll 112a and the cutter anvil roll 111b, the pair of ear hooking members 3, 3 and another pair of ear hooks adjacent to the pair of ear hooking members 3, 3 in the conveying direction X are rotated. It is conveyed while enlarging the distance between the hanging members 3 and 3. In the ear hook member forming process, only the pair of ear hook members 3, 3 are transferred to the transfer roll 112a, and the trim (not shown) formed by cutting the base sheet 30 at the cutting unit 111 is repeated. In the section 112, the sheet is discharged without being transferred to the transfer roll 112a.

The above is the ear hook member forming process, in which the pair of ear hook members 3, 3 are formed, and the ear hook members 3, 3 adjacent to each other in the conveying direction X are spaced apart from each other to form the pair of ear hook members 3. , 3 are successively introduced into the process of forming the next sheet-like mask 1 . The process of forming the sheet mask 1 will be described below with reference to FIGS. 4 and 5. FIG.

In the manufacturing method of the sheet-like mask 1, as shown in FIG. 4, a pair of ear hook members 3, 3 are joined to the belt-like sheet member forming the mask body 2 in an ear hook member joining step. The sheet member means a member including one base sheet or a laminate in which base sheets are laminated. By arranging the heating element 4 between the sheet and the base sheet of the back sheet 20b, the mask body continuum 20 is used in which the heating element 4 is sandwiched between the two sheets. The ear hook member joining process is performed using the ear hook member joining section 130 of the manufacturing apparatus 100 . As shown in FIG. 5, the ear hook member joint 130 includes a joint 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 and the ear hanging member 3, which are sheet members, by thermal fusion.

The joining anvil roll 132 is a metal roll, and as shown in FIG. 5, is arranged downstream 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 peripheral surface of the bonding anvil roll 132 via the pair of ear hook members 3 and 3 and the mask body continuous body 20 .

The bonding anvil roll 132 has a bonding pattern (not shown) for the pair of ear hook members 3, 3 formed on its peripheral surface. The joining anvil roll 132 can adsorb the pair of ear hanging members 3, 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 3,3. A known ultrasonic oscillator can be used for the ultrasonic seal 133 .

In the ear hook member bonding step, as shown in FIG. 4, the mask body continuous body 20 is transported at the ear hook member bonding portion 130, while the outer portion 3s of the ear hook member 3 is transported. As shown in FIG. 5, the pair of ear hook members 3, 3 are sucked and conveyed using the bonding anvil roll 132 so as to be positioned on both sides 20s, 20s along the conveying direction X of the mask 20. A pair of ear hanging members 3, 3 are intermittently arranged in the conveying direction X on the main body continuum 20. - 特許庁Here, when the pair of ear hook members 3, 3 are transported to a position overlapping the mask body continuum 20, the mask body continuum 20 and the ear hook members 3 intermittently arranged, the side portions 20s of the mask body continuous body 20 and the outer portions 3s of the ear hook members 3 are joined between the ultrasonic seal 133 and the joining anvil roll 132 to form the ear hooks. A hanging joint 23 is formed. The step of intermittently arranging the pair of ear hook members 3, 3 on the mask body continuum 20 and the step of forming the ear hook joint 23 may be performed simultaneously or separately. good too.

Next, in the manufacturing method of the sheet-shaped mask 1, as shown in FIGS. Carry out the folding process. The double-folding process is performed using the double-folding unit 140 of the manufacturing apparatus 100 . The double-folding section 140 includes a double-folding guide 141 which is a known double-folding means, and a pair of poles 142 , 142 .

As shown in FIG. 6, the double-folding guide 141 extends along the conveying direction X and is formed so that the length in the thickness direction Z gradually increases from the upstream side to the downstream side, as shown in FIG. , it is arranged in the width direction Y center of the mask body continuum 20 . As the double folding guide 141, a conventionally known folding guide that can be used when folding the mask body continuous body 20 can be used without particular limitation. As shown in FIG. 4, the pair of poles 142, 142 are arranged on both sides 20s, 20s along the conveying direction X of the mask body continuous body 20, and when the side 20s contacts the pole 142, the side The portion 20 s is guided to bend upward in the thickness direction Z of the mask body continuous body 20 .

In the double-folding process, as shown in FIGS. 4 and 6, in the double-folding portion 140, both side portions 20s, 20s along the conveying direction X of the mask body continuous body 20 are brought into contact with a pair of poles 142, 142, and each side is folded. The portion 20s is guided to be bent upward in the thickness direction Z. Then, by the folding guide 141 arranged at the center of the width direction Y of the mask main body continuous body 20, while forming the folding line 25a at the center of the width direction Y, the folding mask is folded in two symmetrically with respect to the folding line 25a. A continuum 22 is formed. As shown in FIG. 6 , the double-folded mask continuous body 22 is folded at the lower side in the thickness direction Z to form a folding line 25 a that serves as the folding side 25 in the lower thickness direction Z. As shown in FIG. The double-folded mask continuous body 22 has a non-folded portion 25n on the upper side in the thickness direction Z. As shown in FIG.

Next, in the manufacturing method of the sheet-shaped mask 1, as shown in FIGS. 4 and 6, a temporary holding step of forming the temporary holding portions 5 in the double-folded mask continuous body 22 is performed. The temporary fastening process is performed using the temporary fastening forming section 150 of the manufacturing apparatus 100 . An ultrasonic seal that oscillates ultrasonic waves or a high-frequency seal that oscillates high frequencies can be used for the temporary retaining portion 150 . is used. The temporary retention unit 150 includes an ultrasonic seal 151, an anvil roll 152 arranged to face the ultrasonic seal 151, and an elevating mechanism (not shown) that elevates 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 ultrasonic oscillator including the ultrasonic seal 151 can be used. The anvil roll 152 is made of metal, and seal projections (not shown) corresponding to the shape of the temporary retaining portions 5 are intermittently arranged on the peripheral surface of the roll in the circumferential direction. The seal convex portion (not shown) is arranged at a portion to be a discarded portion 10 generated in the cutting and dividing step, which will be described later.

In the temporary fastening process, as shown in FIGS. 4 and 6, the double-folded mask continuous body 22 is sandwiched between the ultrasonic seal 151 and the anvil roll 152 in the temporary fastening forming section 150, and the seal protrusion (not shown) is formed. ), ultrasonic vibration is applied to the continuous body of folded masks 22 to intermittently form the temporary fixing portions 5 that maintain the continuous body of folded masks 22 in the folded state. From the viewpoint of not damaging the sheet-shaped mask 1 to be manufactured, the temporary retaining portion 5 is preferably formed at a site that will be a waste site 10 generated in the cutting and dividing step. In addition, from the viewpoint of forming the temporary fixing portion 5 in a portion that becomes a discarded portion 10 generated in the cutting and dividing process, it is possible to easily maintain the double-folded state of the double-folded mask continuous body 22 by using an elevating mechanism (not shown). It is preferable to adjust the positions of the seal 151 and the anvil roll 152 in the thickness direction Z so that they are formed near both ends of the non-folded portion 25n of the double-folded mask continuous body 22 .

Next, in the manufacturing method of the sheet-like mask 1, as shown in FIGS. 4 and 6, a twisting process is performed to twist the double-folded mask continuous body 22 in which the temporary fixing portions 5 are formed. The twisting process is performed using the twisting section 160 of the manufacturing apparatus 100 . The twisting section 160 has a plurality of pairs of twisting guide rolls 161 , 161 .

The twist guide roll 161 is made of metal and has a cylindrical shape. The twist guide roll 161 sandwiches the double-folded mask continuous body 22 between a pair of twisted guide rolls 161, 161, and conveys the double-folded mask continuous body 22 further downstream. The twisting section 160 shown in FIG. 6 intermittently arranges a pair of twisting guide rolls 161, 161 from the upstream side to the downstream side in the conveying direction X. As shown in FIG. The pair of twist guide rolls 161u, 161u on the most upstream side extends in the vertical direction parallel to the thickness direction Z. As shown in FIG. Also, the pair of twist guide rolls 161d, 161d on the most downstream side extends in the horizontal direction parallel to the width direction Y. As shown in FIG. The pair of twisted guide rolls 161, 161 between the pair of twisted guide rolls 161u, 161u on the upstream side and the pair of twisted guide rolls 161d, 161d on the downstream side extends from the upstream side toward the downstream side in the conveying direction X. It is arranged so that it gradually falls down from the vertical direction to the horizontal direction.

In the twisting step, as shown in FIGS. 4 and 6, the double-folded mask continuous body 22 formed with the temporary fixing portions 5 is twisted into a plurality of pairs intermittently arranged in the conveying direction X at the twisting portion 160 . While conveying while being pinched by the guide rolls 161, 161, while conveying from the pair of twist guide rolls 161u, 161u on the upstream side extending in the vertical direction toward the pair of twist guide rolls 161d, 161d on the downstream side extending in the horizontal direction, The conveying direction X is defined as the axial direction of twisting, and twisted 90 degrees around the axis. In the twisting step of the present embodiment, by twisting while conveying, the surface of the double-folded mask continuous body 22 on which the temporary fixing portions 5 are formed faces the vertical direction from the horizontal direction.

In addition, in the manufacturing method of the sheet mask 1, a plurality of pairs of twisting guide rolls 161, 161 are used in the twisting process, but a belt conveyor may be used. As a mode of the belt conveyor, for example, an endless belt is stretched over 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, and A mode in which an endless belt is laid over the other of a pair of extending upstream guide rolls and the other of a pair of horizontally extending downstream guide rolls may be mentioned. By conveying the double-folded mask continuous body 22 while sandwiching it between two endless belts, the double-folded mask continuous body 22 can be twisted 90 degrees around the axis with 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, folding side joining is performed by joining the parts facing each other by folding in two on the folding line 25a side of the continuous body 22 of the folded mask. A fold-side joining portion forming step for forming the portion 24 is performed. The folding side joint forming step is performed using the folding joint forming unit 170 of the manufacturing apparatus 100 . The folding joint forming unit 170 includes a heating roll (not shown) and an anvil roll (not shown) arranged to face the peripheral surface of the heating roll.

The heating roll (not shown) has convex portions (Fig. not shown). The projections (not shown) are intermittently arranged on the peripheral surface of the heating roll in the circumferential direction. The protrusion (not shown) is preferably arranged at a position corresponding to a position where it does not overlap the ear hook member 3 and the heating element 4 .

In the fold-side joint forming step, as shown in FIGS. 4 and 6, in the fold-joint forming unit 170, the two-fold mask continuous body 22 formed with the temporary fixing portions 5 after the twisting step is rolled by a heating roll (see FIG. 6). (not shown) and an anvil roll (not shown), spaced apart in the conveying direction X on the double-fold mask continuous body 22, and at a position where it does not overlap the ear hook member 3 and the heating element 4 , a folding side joint portion 24 is formed. By forming the fold-side joint portion 24 on the folding line 25a side of the double-folded mask continuous body 22, the double-folded state is maintained. A precursor of the sheet-shaped mask 1 is formed by forming the fold-side joint portion 24 in the double-folded mask continuous body 22 .

Next, in the method for manufacturing the sheet-like mask 1, as shown in FIGS. 4 and 6, a cutting and dividing step is performed in which the precursor of the sheet-like mask 1 is cut and divided into individual sheet-like masks 1. FIG. The cutting and dividing step is performed using the cutting and dividing section 180 of the manufacturing apparatus 100 . The cutting and splitting section 180 includes a cutter roll (not shown) and an anvil roll (not shown) arranged to face the peripheral surface of the cutter roll.

A cutter roll (not shown) has a plurality of cutter blades arranged in a circumferential direction in a pattern following the shape of the sheet mask 1 folded in half shown in FIG. 2 . The cutter blade is formed in a shape that partially overlaps with the folding side joint portion 24 .

In the cutting and dividing step, as shown in FIG. 4 , the double-fold mask continuous body 22 is stabilized in the double-folded state by the temporary fastening portions 5 formed in the temporary fastening step at the cutting and dividing portion 180 . The precursor of the shaped mask 1 is conveyed to the nip portion between the cutter roll (not shown) and the anvil roll (not shown), and the folding side joint formed on the folding line 25a side of the double-folded mask continuous body 22 is formed. A sheet mask 1 folded in half is intermittently formed by cutting at a position including part of the portion 24 . The formed sheet mask 1 has a nose-side fold joint 24a and a chin-side fold joint 24b. A sheet-shaped mask 1 is formed, and at the same time, a disposal site 10 other than the intended sheet-shaped mask 1 is formed. A temporary retaining portion 5 is arranged in the formed disposal portion 10 . As described above, in the cutting and dividing step using the cutting and dividing portion 180, the precursor of the sheet-like mask 1 is separated into the target sheet-like mask 1 and the disposal portion 10 where the temporary retaining portion 5 is arranged.

As described above, in the method for manufacturing the sheet-shaped mask 1 using the manufacturing apparatus 100, as shown in FIG. After the twisting step of twisting while conveying the two-fold mask continuous body 22 on which the temporary fastening portion 5 is formed, the temporary fastening portion 5 is cut in the cutting and dividing step. In 5, the double-folded mask continuous body 22 can be cut in a state in which the double-folded state of the double-folded mask continuous body 22 is stabilized. As a result, the miniaturized sheet-like mask 1 in which the pair of ear hook members 3, 3 are arranged on the inner surface side of the mask main body 2 folded in two can be manufactured accurately, continuously and efficiently.

In the manufacturing method of the sheet-shaped mask 1, as shown in FIG. A heating element placement step is performed to place the heating element 4 on the member. The heating element placement step is performed using the heating element placement section 120 of the manufacturing apparatus 100 . As shown in FIG. 4 , the heating element placement section 120 includes a heating element forming section 121 and a heating element re-pitch section 122 .

The heating element forming part 121 forms a heating element continuous body 4a in which a pair of heating elements 4, 4 juxtaposed in the width direction Y are arranged intermittently in the conveying direction X, and is a known heating element forming means. can be used. The heating element re-pitch part 122 widens the distance between a pair of heating elements 4, 4 and another pair of heating elements 4, 4 adjacent to each other in the conveying direction X of the pair of heating elements 4, 4 and conveys them. and known re-pitch means can be used.

In the heating element arrangement step, as shown in FIG. 4, in the heating element arrangement section 120, first, the heating element forming section 121 applies or spreads the heat generating composition 41 on one surface of the non-air-permeable sheet 40b. Alternatively, the layer of the heat-generating composition 41 that has been sprayed is covered with the air-permeable sheet 40t to form the pair of heat-generating element continuum 4a. After that, the heating element continuum 4a is cut to form a plurality of heating elements 4 in which a pair of sheet heating elements 4, 4 juxtaposed in the width direction Y are arranged intermittently in the transport direction X. After that, in the heating element re-pitch section 122, the distance in the conveying direction X between the pair of heating elements 4, 4 juxtaposed in the width direction Y and the other heating elements 4, 4 adjacent in the conveying direction X is widened, and the mask It is arranged on the base sheet of the back sheet 20 b that constitutes the main body continuum 20 . In the heat generating element arrangement step, the pair of heat generating elements 4, 4 are arranged at positions avoiding the ear hooking joint 23 and the temporary retaining portion 5 in advance from the viewpoint of not damaging the heat generating elements 4 in the sheet-shaped mask 1 to be manufactured. is preferred.

After the heating element placement step, as shown in FIG. 4, a plurality of pairs of heating elements 4, 4 arranged on the base sheet of the back sheet 20b are entirely covered. Then, the base sheet of the surface sheet 20t is superposed on the mask body continuum 20 in the form of a strip.

In the temporary fastening process described above, in the temporary fastening forming section 150, as shown in FIGS. It is preferable to intermittently form the temporary fastening portion 5 that maintains the double-folded state at a position that avoids the ear hook joint portion 23 and the heating element 4 .

Next, materials for forming members used for the sheet mask 1 will be described.

The top sheet 20t and the back sheet 20b of the mask main body 2 of the sheet mask 1 preferably contain heat-fusible fibers from the viewpoint of fusing the sheets together. Examples of heat-fusible fibers include polyolefin fibers such as polyethylene, polypropylene and polyvinyl alcohol, polyester fibers, polyethylene-polypropylene conjugated fibers, polyethylene-polyester conjugated fibers, low-melting polyester-polyester conjugated fibers, and hydrophilic fiber surfaces. Polyvinyl alcohol-polypropylene conjugated fibers and polyvinyl alcohol-polyester conjugated fibers, which are flexible, and the like. When conjugated fibers are used, both sheath-core conjugated fibers and side-by-side conjugated fibers can be used. These heat-fusible fibers can be used alone or in combination of two or more.

From the viewpoint of being fused to the surface sheet 20t of the mask body 2, it is preferable that the pair of ear hook members 3, 3 contain heat-fusible fibers. As the heat-fusible fibers, the same types of fibers as those used for the top sheet 20t and the back sheet 20b of the mask body 2 can be used.

Moreover, it is preferable that the pair of ear hook members 3, 3 have stretchability. When the pair of ear hook members 3, 3 have stretchability, it is preferable to use, for example, a stretchable nonwoven fabric as the base sheet 30 of the pair of ear hook members 3, 3, because of ease of stretching and good touch. It is preferable from the point of As the stretchable nonwoven fabric, nonwoven fabrics containing at least elastic fibers as constituent fibers, such as air-through nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics and spunlaced nonwoven fabrics, can be used.

The air-permeable sheet 40t of the heating element is preferably formed containing heat-fusible fibers. As the heat-fusible fibers, the same types of fibers as those used for the top sheet 20t and the back sheet 20b of the mask body 2 can be used.

The heat-generating composition 41 of the heat-generating body 4 preferably contains an oxidizable metal, a carbon component, water, and the like. As the oxidizable metal particles constituting the heat-generating composition 41, a metal that generates heat of oxidation reaction is used. Examples include powders and fibers. Among them, iron is preferable, and iron powder is particularly preferable, from the viewpoints of handleability, safety, production cost, storage stability and stability. Examples of 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 that constitutes the exothermic composition 41 has at least one function of water retention ability, oxygen supply ability, and catalytic ability, and preferably has all 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 of easily adsorbing oxygen when wet and keeping the moisture content in the heating element 4 constant. More preferably, one or two or more kinds of fine powder or small granules selected from coconut shell charcoal, wood powder charcoal and peat charcoal are used. Among them, wood powder charcoal is preferable because it is easy to keep the moisture content of the heating element 4 within a desired range.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to this embodiment using the manufacturing apparatus 100 . For example, in the manufacturing method of the sheet 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.

In addition, in the present embodiment using the manufacturing apparatus 100 described above, the folding side joint forming step for forming the folding side joint 24 is performed after the twisting step, but may be performed before the twisting step. Moreover, the fold-side joint forming step may be omitted. In addition, the fold-side joint 24 formed in the fold-side joint forming process has a nose-side fold joint 24a and a chin-side fold joint 24b. It may have one of the portions 24b.

In addition, in the present embodiment using the above-described manufacturing apparatus 100, the temporary retaining portion 5 formed in the temporary retaining process is formed in a portion to be the discarded portion 10 generated in the cutting and dividing process. It may be formed in a mask.

1 sheet mask 2 mask body 20 mask body continuum 20s side of mask body continuum 22 folded mask continuum 23 ear hook joint 24 fold side joint 24a nose side fold joint 24b chin side fold joint 25a folding Wire 3 Ear hook member 4 Heating element 100 Manufacturing device

Claims (6)

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,
an ear hook member forming step of cutting a strip-shaped base sheet to form a pair of the ear hook members juxtaposed in the width direction;
A pair of the ear hook members are intermittently arranged on the conveyed strip-shaped sheet member in the conveying direction of the sheet member, and the sheet member and the ear hook member are arranged on both sides along the conveying direction of the sheet member. an ear hook member joining step of joining to form an ear hook joint;
a double-folding step of folding the sheet member having the ear hook joint formed in two at the center portion in the width direction of the sheet member to form a double-folded mask continuous body;
a twisting step of twisting the double-folded mask continuum around its axis, with the transport direction as the axis direction of the twist;
After the twisting step, a cutting and dividing step of cutting the double-folded mask continuous body and dividing it into individual double-folded sheet masks,
A method for manufacturing a sheet-shaped mask, comprising a temporary fastening step of forming a temporary fastening portion in the double-folded mask continuous body between the folding step and the twisting step. 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,
A pair of ear hanging members are intermittently arranged on a conveyed sheet member having a structure in which a heating element is sandwiched between two band-shaped sheets in a conveying direction of the sheet member. an ear hook member joining step of joining the sheet member and the ear hook member to form an ear hook joint on both sides along the conveying direction of the
a double-folding step of folding the sheet member having the ear hook joint formed in two at the center portion in the width direction of the sheet member to form a double-folded mask continuous body;
a twisting step of twisting the double-folded mask continuum around its axis, with the transport direction as the axis direction of the twist;
After the twisting step, a cutting and dividing step of cutting the double-fold mask continuous body and dividing it into individual double-folded sheet masks,
A method for manufacturing a sheet-like mask, comprising a temporary fastening step of forming temporary fastening portions in the double-folded mask continuous body between the folding step and the twisting step. In the cutting and dividing step, the double-fold mask continuous body is cut so as to produce the sheet-like mask and a discarded portion,
3. The method for manufacturing a sheet-like mask according to claim 1, wherein, in said temporary holding step, said temporary holding portion is formed at said disposal site. The method for manufacturing a sheet-like mask according to any one of claims 1 to 3 , wherein in the temporary fixing step, the temporary fixing portions are formed by ultrasonic sealing. 3. The method of manufacturing a sheet-like mask according to claim 2, wherein said sheet member has a structure in which said pair of said heating elements arranged side by side in the width direction of said sheet is sandwiched between said two belt-like sheets. 3. The method of manufacturing a sheet-like mask according to claim 2 , wherein in said temporary fastening step, said temporary fastening portion is formed at a position avoiding said ear hooking joint portion and said heating element.

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