WO2024071423A1 - Wearable article production device and wearable article production method - Google Patents

Wearable article production device and wearable article production method Download PDF

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Publication number
WO2024071423A1
WO2024071423A1 PCT/JP2023/035792 JP2023035792W WO2024071423A1 WO 2024071423 A1 WO2024071423 A1 WO 2024071423A1 JP 2023035792 W JP2023035792 W JP 2023035792W WO 2024071423 A1 WO2024071423 A1 WO 2024071423A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sheets
absorbent body
elastic member
manufacturing
Prior art date
Application number
PCT/JP2023/035792
Other languages
French (fr)
Japanese (ja)
Inventor
豊志 梅林
Original Assignee
株式会社瑞光
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Filing date
Publication date
Application filed by 株式会社瑞光 filed Critical 株式会社瑞光
Publication of WO2024071423A1 publication Critical patent/WO2024071423A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers

Definitions

  • the present disclosure relates to a manufacturing apparatus for wearable articles and a manufacturing method for wearable articles.
  • Patent Document 1 JP Patent Publication 4-354948 discloses a wearable article such as disposable pants with three-dimensional cuffs (pockets) that prevent the leakage of body waste from the waist opening, and a method for manufacturing the same.
  • the article disclosed in Patent Document 1 includes a back sheet, a top sheet, and an absorbent disposed between the back sheet and the top sheet.
  • the three-dimensional cuffs of the article are provided on the inside of the waist opening and extend toward the absorbent.
  • the method of manufacturing a worn article disclosed in Patent Document 1 includes a step of intermittently placing an absorbent body on a web-like back sheet unwound from a winding device (absorbent body placing step), a step of overlapping a top sheet unwound from a roll onto the back sheet and absorbent body (overlapping step), a step of placing cuff elastic members and wrapping them with both end edges of the back sheet (cuff forming step), and a step of placing waist elastic members and wrapping them again with both end edges of the back sheet (waist elastic member placing step).
  • the edges of the backsheet are joined to the surface of the backsheet in order to encase the cuff elastic members.
  • the surface of the backsheet is joined to the surface of the topsheet in order to encase the waist elastic members.
  • the backsheet and topsheet are joined by clamping them with a clamping element (for example, an ultrasonic horn and anvil in the case of ultrasonic welding).
  • the absorbent body is thicker than the back sheet and top sheet because an absorbent core is layered inside. Therefore, in the process of bonding using a clamping element, when the clamping element clamps the absorbent body together with the back sheet, a difference in the weight (clamping pressure) acting on the absorbent body and back sheet occurs due to the difference in thickness between them, which may prevent proper bonding.
  • the present disclosure aims to provide a manufacturing device for wearable articles that can prevent poor bonding caused by a clamping element clamping both an absorbent body and a sheet, and a manufacturing method for wearable articles using the same.
  • the worn article has an absorbent body and a waistband member.
  • the waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
  • the manufacturing device for the worn article is equipped with two clamping elements that sandwich the laminate in the stacking direction and bond the sheets together. At least one of the two clamping elements is formed with a recess that accommodates the absorbent body when the sheets are bonded together. The two clamping elements bond the sheets together in an area where the laminate and the absorbent body do not overlap.
  • the present application also discloses a method for manufacturing a worn article.
  • the method for manufacturing a worn article includes a joining step in which two clamping elements sandwich a laminate in the stacking direction while accommodating an absorbent in a recess formed in at least one of the two clamping elements, and the sheets are joined together in an area where the laminate and the absorbent do not overlap.
  • the absorbent is accommodated in the recess when the sheets are joined together. This prevents differences in the clamping pressure acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet.
  • the manufacturing apparatus and manufacturing method disclosed herein can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
  • FIG. 1 is a perspective view of a disposable diaper 1.
  • FIG. 2 is a development view of the disposable diaper 1 as seen from the surface facing the wearer's skin.
  • FIG. 2 is a development view of the disposable diaper 1 as seen from the side opposite to the side that comes into contact with the wearer's skin. This is a cross-sectional view of the disposable diaper 1 taken along A-A' in Figure 1B.
  • 2 is a schematic process diagram showing a manufacturing method of the disposable diaper 1.
  • FIG. FIG. 2 is a perspective view of the manufacturing apparatus 100.
  • FIG. 2 is a perspective view of the manufacturing apparatus 100.
  • 1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4.
  • FIG. 1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4.
  • 1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4.
  • FIG. 5C is a schematic plan view of the manufacturing apparatus 100 shown in FIG. 5B.
  • 10 is a schematic process diagram showing a manufacturing method of the disposable diaper 1 using the manufacturing apparatus 100 according to the modified example A.
  • This section describes a method for manufacturing a disposable diaper 1 and an apparatus 100 for manufacturing a disposable diaper 1 according to one embodiment of the present disclosure.
  • a disposable diaper 1 will be described.
  • the disposable diaper 1 is an example of a worn article.
  • Fig. 1A is a perspective view of the disposable diaper 1.
  • Fig. 1B is a developed view of the disposable diaper 1 as viewed from the surface that contacts the wearer's skin.
  • Fig. 1B is a developed view of the disposable diaper 1 as viewed from the surface opposite to the surface that contacts the wearer's skin.
  • Fig. 1C is a cross-sectional view of the disposable diaper 1 taken along line A-A' in Fig. 1B.
  • the disposable diaper 1 has a front abdominal portion 2, a rear portion 3, an absorbent body 4, a front elastic member 5, a rear elastic member 6, and pockets P1 and P2.
  • the side that touches the wearer's skin will be referred to as the "skin side,” and the side opposite the side that touches the wearer's skin will be referred to as the "outer side.”
  • the front abdominal portion 2 is a band-shaped laminate that is located at the front of the abdomen when the wearer wears the disposable diaper 1.
  • the front abdominal portion 2 is composed of a laminate in which a first sheet 2a is folded in half and laminated.
  • the first sheet 2a is formed using a nonwoven fabric.
  • the front abdominal portion 2 is an example of a waistband member.
  • the rear section 3 is a band-shaped laminate that is positioned behind the buttocks when the wearer wears the disposable diaper 1.
  • the rear section 3 is composed of a laminate in which the second sheet 3a is folded in half and laminated.
  • the second sheet 3a is made of a nonwoven fabric.
  • the rear section 3 is an example of a waistband member.
  • the front abdominal portion 2 and the rear back portion 3 are joined at their longitudinal ends to form a waist opening W into which the wearer's torso is inserted.
  • the absorbent body 4 is a strip-shaped laminate located under the crotch of the wearer when the disposable diaper 1 is worn by the wearer.
  • the absorbent body 4 absorbs body fluids such as urine of the wearer.
  • the absorbent body 4 has a top sheet 4a, a cover sheet 4b, and an absorbent core 4c provided between the top sheet 4a and the cover sheet 4b.
  • the absorbent body 4 is thicker than the first sheet 2a and the second sheet 3a.
  • top sheet and cover sheet The top sheet 4a is a belt-shaped sheet provided on the skin side.
  • the cover sheet 4b is a belt-shaped sheet provided on the outer side.
  • the top sheet 4a and the cover sheet 4b have the same shape, and their edges are joined to each other.
  • the top sheet 4a is a liquid-permeable sheet.
  • the top sheet 4a is made of a nonwoven fabric or mesh sheet that allows liquid to pass through.
  • the cover sheet 4b is a breathable sheet.
  • the cover sheet 4b is made of a breathable polyethylene film, a water-repellent and breathable nonwoven fabric, or a laminated sheet of these.
  • the absorbent core 4c absorbs bodily fluids that have infiltrated through the top sheet 4a.
  • the planar shape of the absorbent core 4c is a strip that is slightly smaller than the top sheet 4a and the cover sheet 4b.
  • the absorbent core 4c is housed inside the top sheet 4a and the cover sheet 4b, the edges of which are joined.
  • the absorbent core 4c is formed by layering fluff made by crushing roll pulp and defibrating it.
  • the absorbent core 4c may be formed by mixing the fluff with a superabsorbent polymer.
  • the absorbent core 4c may also be made of only nonwoven fabric without using fluff, or nonwoven fabric carrying a superabsorbent polymer.
  • the front elastic member 5 is a thread-like elastic member arranged to be stretchable along the longitudinal direction of the front abdominal portion 2.
  • the front elastic member 5 is rubber thread.
  • the front elastic member 5 is arranged inside the front abdominal portion 2 (in other words, between the first sheet 2a folded in half) along the longitudinal direction of the front abdominal portion 2.
  • eleven front elastic members 5 are arranged at equal intervals along the width direction of the front abdominal portion 2.
  • the number of front elastic members 5 may be ten or less, or twelve or more.
  • the front elastic member 5 is an example of an elastic member.
  • the front elastic member 5 is formed using a material such as polyurethane, natural rubber, or thermoplastic resin.
  • the rear elastic member 6 is a thread-like elastic member arranged to be stretchable along the longitudinal direction of the rear portion 3.
  • the rear elastic member 6 is rubber thread.
  • the rear elastic member 6 is arranged inside the rear portion 3 (in other words, between the folded second sheet 3a) along the longitudinal direction of the rear portion 3.
  • eleven rear elastic members 6 are arranged at equal intervals along the width direction of the rear portion 3.
  • the number of the rear elastic members 6 may be ten or less, or twelve or more.
  • the rear elastic member 6 is an example of an elastic member.
  • the rear elastic member 6 is formed using a material such as polyurethane, natural rubber, or thermoplastic resin.
  • the pockets P1 and P2 are pockets that prevent the wearer's excrement from leaking from the waist opening W.
  • the pockets P1 and P2 are formed so as to open downward when the wearer wears the disposable diaper 1. More specifically, the pocket P1 is formed in an area of the skin-side first sheet 2a that overlaps with the absorbent body 4 in a plan view.
  • the pocket P2 is formed in an area of the skin-side second sheet 3a that overlaps with the absorbent body 4 in a plan view.
  • the pockets P1 and P2 are areas indicated by diagonal hatching in FIG. 1B.
  • the absorbent body 4 has one end 4ea in the longitudinal direction joined to the front abdominal section 2 and the other end 4eb in the longitudinal direction joined to the rear section 3.
  • one end 4ea of the absorbent body 4 is inserted between the folded first sheet 2a at approximately the center in the longitudinal direction of the front abdominal portion 2.
  • the one end 4ea of the absorbent body 4 inserted between the folded first sheet 2a is joined to the outer first sheet 2a.
  • the other end 4eb of the absorbent 4 is inserted between the folded second sheets 3a at approximately the center of the longitudinal direction of the rear portion 3.
  • the other end 4eb of the absorbent 4 inserted between the folded second sheets 3a is joined to the outer second sheet 3a.
  • the second sheet 3a which is folded in half and laminated, is joined in a region where the inner surfaces do not overlap with the other end 4eb of the absorbent body 4.
  • the area on the skin side of the second sheet 3a that overlaps with the other end 4eb of the absorbent body 4 in a plan view becomes the pocket P2.
  • the front elastic member 5 arranged inside the front abdominal portion 2 is joined to one of the inner surfaces of the folded first sheet 2a (in other words, one of the two surfaces facing each other in the stacking direction) in a region where one end 4ea of the absorbent body 4 does not overlap in a plan view. This fixes the front elastic member 5 to the first sheet 2a.
  • the rear elastic member 6 arranged inside the rear portion 3 is joined to one of the inner surfaces of the folded second sheet 3a (in other words, one of the two surfaces facing each other in the stacking direction) in an area where the other end 4eb of the absorbent body 4 does not overlap in a plan view. This fixes the rear elastic member 6 to the second sheet 3a.
  • the manufacturing method of the disposable diaper 1 includes a first sheet and a second sheet forming step (1), a first joining step (2), a front elastic member and a rear elastic member arranging step (3), a first folding step (4), a second joining step (5), a second folding step (6), a third joining step (7), and a cutting step (8).
  • Fig. 2 is a schematic process diagram showing the manufacturing method of the disposable diaper 1.
  • a roll-shaped sheet S which is the material for the first sheet 2a and the second sheet 3a, is unfolded.
  • the unfolded sheet S is cut into the first sheet 2a and the second sheet 3a along the longitudinal direction by a cutter (not shown) located approximately in the center of the width direction.
  • the first sheet 2a and the second sheet 3a are fed along the longitudinal direction while being subjected to a predetermined amount of tension until the cutting process (8).
  • the first sheet 2a and second sheet 3a cut from the sheet S are expanded in width from a center line CL that extends along the longitudinal direction of the sheet S at the center of the width of the sheet S toward the outside in the width direction (see the arrow in Figure 2). After this, the first sheet 2a and second sheet 3a are fed parallel to each other in the longitudinal direction until just before the second folding process (6).
  • the cutter forms a cut surface in the sheet S that extends in the longitudinal direction while drawing an S-shape (wave shape) in a plan view.
  • phase alignment is performed so that the cut surfaces of the first sheet 2a and the second sheet 3a are symmetrical with respect to the center line CL.
  • the absorbent body 4 is positioned so that, in a plan view, one end 4ea of the absorbent body 4 overlaps the first sheet 2a and the other end 4eb of the absorbent body 4 overlaps the second sheet 3a. After that, one end 4ea of the absorbent body 4 is joined to the first sheet 2a, and the other end 4eb of the absorbent body 4 is joined to the second sheet 3a.
  • first folding in half process (4) the first sheet 2a and the second sheet 3a are each folded in half in the width direction such that their widthwise edges overlap in a plan view. More specifically, the first sheet 2a and the second sheet 3a are each folded in half such that the edge farther from the center line CL overlaps the edge closer to the center line CL. As a result, a laminate in which the first sheet 2a is folded in half and stacked, and a laminate in which the second sheet 3a is folded in half and stacked are formed.
  • one end 4ea of the absorbent body 4 and the front elastic member 5 are disposed inside the laminate of the first sheet 2a folded in half.
  • the other end 4eb of the absorbent body 4 and the rear elastic member 6 are disposed inside the laminate of the second sheet 3a folded in half.
  • the first sheets 2a are bonded to each other, and the first sheets 2a and the front elastic member 5 are bonded to each other in the areas where the first sheets 2a do not overlap with the absorbent body 4, using a manufacturing apparatus 100 for the disposable diaper 1 described later.
  • the second sheets 3a are bonded to each other, and the second sheets 3a and the rear elastic member 6 are bonded to each other in the areas where the second sheets 3a do not overlap with the absorbent body 4. More specifically, the first sheets 2a are bonded to each other at their opposing inner surfaces.
  • the front elastic member 5 is bonded to one of the inner surfaces of the first sheet 2a folded in half.
  • the second sheets 3a are bonded to each other at their opposing inner surfaces.
  • the rear elastic member 6 is bonded to one of the inner surfaces of the second sheet 3a folded in half. In this way, pockets P1 and P2 are formed.
  • the joining of the absorbent body 4 to each of the first sheet 2a and the second sheet 3a in the first joining step (2) may be performed in the second joining step (5).
  • the step following the first and second sheet forming step (1) only the arrangement of the absorbent body 4 on the first sheet 2a and the second sheet 3a is performed.
  • the second joining step (5) one end 4ea of the absorbent body 4 is joined to the first sheet 2a, and the other end 4eb of the absorbent body 4 is joined to the second sheet 3a using the manufacturing device 100.
  • the joining of the first sheets 2a to each other, the joining of the first sheet 2a to the front elastic member 5, the joining of the second sheets 3a to each other, and the joining of the second sheet 3a to the rear elastic member 6 are also performed simultaneously.
  • Second Bifolding Step In the second bifolding step (6), the absorbent body 4 is folded at the center in the longitudinal direction so that the first sheet 2a and the second sheet 3a overlap in a plan view.
  • a side seal portion SS is formed in which the first sheet 2a and the second sheet 3a are bonded across the width in the center of two adjacent absorbents 4 in a plan view.
  • the manufacturing apparatus 100 includes an ultrasonic horn 110 and an anvil roller 120.
  • Fig. 3 is a perspective view of the ultrasonic horn 110.
  • Fig. 4 is a perspective view of the anvil roller 120.
  • FIGS. 5A, 5B, and 5C are schematic cross-sectional views showing the manufacturing apparatus 100 storing the absorbent body 4 in chronological order.
  • FIG. 6 is a schematic plan view of the manufacturing apparatus 100 shown in FIG. 5B.
  • the ultrasonic horn 110 and the anvil roller 120 sandwich the laminate made of the first sheet 2a in the stacking direction, and bond the first sheets 2a together, any of the inner surfaces of the first sheets 2a, and the front elastic member 5 in the areas where the first sheets 2a do not overlap with the absorbent body 4.
  • the ultrasonic horn 110 and the anvil roller 120 sandwich the laminate made of the second sheet 3a in the stacking direction, and bond the second sheets 3a together, any of the inner surfaces of the second sheets 3a, and the rear elastic member 6 in the areas where the second sheets 3a do not overlap with the absorbent body 4.
  • the ultrasonic horn 110 and the anvil roller 120 are an example of a clamping element.
  • the ultrasonic horn 110 and the anvil roller 120 further bond one end 4ea of the absorbent body 4 to the first sheet 2a and the other end 4eb of the absorbent body 4 to the second sheet 3a, respectively.
  • the ultrasonic horn 110 applies ultrasonic vibrations to the first sheet 2 a, the second sheet 3 a, the front elastic member 5, and the rear elastic member 6.
  • the ultrasonic horn 110 has a vibration surface 110a that contacts both the first sheet 2a and the second sheet 3a and vibrates ultrasonically.
  • the vibration surface 110a is a strip-shaped surface of a predetermined width.
  • the vibration surface 110a is arranged so that its longitudinal direction is aligned with the width direction of the first sheet 2a and the second sheet 3a.
  • the vibration surface 110a is also formed to a length that allows it to contact both the first sheet 2a and the second sheet 3a simultaneously.
  • the vibration surface 110a is arranged so that it contacts the outer sides of each of the first sheet 2a and the second sheet 3a.
  • the anvil roller 120 is disposed so as to sandwich the first sheet 2a, the second sheet 3a, the front elastic member 5, and the rear elastic member 6 together with the ultrasonic horn 110.
  • the anvil roller 120 is cylindrical, and rotates about a central axis 120c by a driving force generated by a driving unit (not shown).
  • the anvil roller 120 is positioned such that its central axis 120c is aligned along the longitudinal direction of the vibration surface 110a and faces the vibration surface 110a across the first sheet 2a, the second sheet 3a, the front elastic member 5, and the rear elastic member 6.
  • the radius of the anvil roller 120 is set to a size that allows the outer circumferential surface 120a of the anvil roller 120 to contact the first sheet 2a and the second sheet 3a.
  • the length of the anvil roller 120 in the axial direction is formed to a length that allows it to contact both the first sheet 2a and the second sheet 3a simultaneously.
  • the outer circumferential surface 120a of the anvil roller 120 is positioned so that it contacts the skin side of each of the first sheet 2a and the second sheet 3a.
  • the anvil roller 120 has a recess 120b formed on its outer circumferential surface 120a for accommodating the absorbent 4 in the second joining step (5).
  • the recess 120b is formed in a shape that can accommodate the absorbent 4 in the second joining step (5), while bonding the first sheets 2a together and the first sheet 2a and the front elastic member 5 in the area where the first sheets 2a and the absorbent 4 do not overlap, and bond the second sheets 3a together and the second sheet 3a and the rear elastic member 6 in the area where the second sheets 3a and the absorbent 4 do not overlap (see FIG. 6).
  • the recess 120b is formed into a shape that can accommodate a portion of the absorbent 4 in the second joining step (5) while also joining one end 4ea of the absorbent 4 and the first sheet 2a, and the other end 4eb of the absorbent 4 and the second sheet 3a.
  • a drive unit (not shown) rotates the anvil roller 120 in conjunction with the speed at which the first sheet 2a and the second sheet 3a are fed in the manufacturing process.
  • the drive unit also rotates the anvil roller 120 so that the recess 120b accommodates at least a portion of the absorbent 4 when the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding process (5) (see Figures 5A, 5B, 5C, and 6).
  • the manufacturing apparatus 100 is an apparatus for manufacturing a disposable diaper 1.
  • the disposable diaper 1 has an absorbent body 3, a front abdominal portion 2, and a rear portion 3 (waistline member).
  • the front abdominal portion 2 is composed of a strip-shaped laminate in which a first sheet 2a is folded in half and laminated.
  • the rear portion 3 is composed of a strip-shaped laminate in which a second sheet 3a is folded in half and laminated. At least one end of the absorbent body 4 in the longitudinal direction is joined to the front abdominal portion 2 and the rear portion 3.
  • the manufacturing device 100 is equipped with two clamping elements, an ultrasonic horn 110 and an anvil roller 120, which sandwich the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 in the stacking direction and bond the first sheets 2a together and the second sheets 3a together, respectively.
  • At least one of the two clamping elements (in this embodiment, the anvil roller 120) has a recess 120b that accommodates the absorbent body 4 when the first sheets 2a together and the second sheets 3a together are bonded.
  • the two clamping elements bond the first sheets 2a together and the second sheets 3a together in areas where the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 do not overlap with the absorbent body 4.
  • the manufacturing apparatus 100 when the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding step (5), at least a portion of the absorbent 4 is accommodated in the recess 120b. This prevents the ultrasonic horn 110 and the anvil roller 120 from clamping the absorbent 4, thereby suppressing the movement of the ultrasonic horn 110 and/or the anvil roller 120 due to the thickness of the absorbent 4. As a result, differences in the load (clamping pressure) acting on the absorbent 4 and the first sheet 2a and second sheet 3a due to differences in thickness between the absorbent 4 and the first sheet 2a and second sheet 3a are suppressed.
  • the manufacturing device 100 can prevent poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together.
  • the two clamping elements may simultaneously join the first sheets 2a on the one end 4ea side of the absorbent body 4 in the longitudinal direction and join the second sheets 3a on the other end 4eb side of the absorbent body 4 in the longitudinal direction.
  • a clamping element for bonding the first sheets 2a together and a clamping element for bonding the second sheets 3a together can be provided separately and positioned away from the absorbent 4 so as not to come into contact with the absorbent 4.
  • the manufacturing apparatus is configured in this way, it is necessary to provide two clamping elements, which increases the manufacturing costs of the apparatus.
  • the manufacturing device 100 uses a pair of ultrasonic horns 110 and anvil rollers 120 to simultaneously bond the absorbent body 4 to the first sheet 2a and the second sheet 3a, as well as bond the first sheets 2a together and the second sheets 3a together.
  • the manufacturing device 100 can suppress the occurrence of poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together while suppressing an increase in the manufacturing cost of the device.
  • the disposable diaper 1 further has a front elastic member 5 and a rear elastic member 6.
  • the front elastic member 5 is an elastic member arranged inside the front abdominal portion 2 so as to be stretchable along the longitudinal direction of the front abdominal portion 2.
  • the rear elastic member 6 is an elastic member arranged inside the rear portion 3 so as to be stretchable along the longitudinal direction of the rear portion 3.
  • the manufacturing method of the disposable diaper 1 includes a second joining step (5) of clamping the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 in the stacking direction while accommodating the absorbent 4 in a recess 120b formed in at least one of the two clamping elements, the ultrasonic horn 110 and the anvil roller 120 (in this embodiment, the anvil roller 120), and joining the first sheets 2a to each other and the second sheets 3a to each other in areas where the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 do not overlap with the absorbent 4.
  • the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding step (5), at least a portion of the absorbent 4 is accommodated in the recess 120b.
  • differences in the load (clamping pressure) acting on the absorbent 4 and the first sheet 2a and second sheet 3a due to differences in thickness between the absorbent 4 and the first sheet 2a and second sheet 3a are suppressed.
  • this manufacturing method can prevent poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping and pressing the absorbent body 4 and the first sheet 2a and second sheet 3a together.
  • a pair of ultrasonic horns 110 and anvil rollers 120 can be used to bond the absorbent body 4 to the first sheet 2a and the second sheet 3a, as well as to simultaneously bond the first sheets 2a together and the second sheets 3a together.
  • this manufacturing method can suppress the occurrence of poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together while suppressing increases in manufacturing costs.
  • the pinching elements are an ultrasonic horn 110 and an anvil roller 120 .
  • the front portion 2 and the rear portion 3 are formed by cutting the first sheet 2a and the second sheet 3a, which are folded in half.
  • the front portion 2 may be formed by stacking a plurality of the first sheets 2a, 2a' and cutting them in the cutting step (8).
  • the rear portion 3 may be formed by stacking a plurality of the second sheets 3a, 3a' and cutting them in the cutting step (8).
  • FIG. 7 is a schematic process diagram showing a method for manufacturing a disposable diaper 1 using the manufacturing apparatus 100 relating to variant A.
  • the following will focus on the differences between the manufacturing method for a disposable diaper 1 according to the above embodiment and the manufacturing method for a disposable diaper 1 using the manufacturing apparatus 100 relating to variant A. Note that the same or corresponding components will be given the same reference symbols and descriptions will be omitted as appropriate.
  • first sheets 2a, 2a' for forming the front abdominal portion 2 and second sheets 3a, 3a' for forming the rear portion 3 are formed.
  • first sheet and second sheet forming process (1)' two roll-shaped sheets S1 and S1' are unfolded to form the first sheets 2a, 2a' and the second sheets 3a, 3a'. More specifically, the first sheet 2a and the second sheet 3a, which will be the outer side, are formed from sheet S1. The first sheet 2a' and the second sheet 3a', which will be the skin side, are formed from sheet S2. Note that no S-shape (wave shape) is formed in the first sheet 2a and the second sheet 3a, which will be the skin side.
  • the front elastic member 5 is arranged on the first sheet 2a, which is the outer side, in the longitudinal direction of the first sheet 2a.
  • the rear elastic member 6 is arranged on the second sheet 3a, which is the outer side, in the longitudinal direction of the second sheet 3a.
  • the manufacturing apparatus 100 for the disposable diaper 1 is used to bond the two stacked first sheets 2a, 2a' to each other, and the first sheets 2a, 2a' and the front elastic member 5 in the areas where the first sheets 2a, 2a' do not overlap with the absorbent 4.
  • the manufacturing apparatus 100 for the disposable diaper 1 is used to bond the two stacked second sheets 3a, 3a' to each other, and the second sheets 3a, 3a' and the rear elastic member 6 in the areas where the second sheets 3a, 3a' do not overlap with the absorbent 4. More specifically, the stacked first sheets 2a, 2a' are bonded to each other at their inner surfaces facing each other.
  • the front elastic member 5 is bonded to one of the inner surfaces of the stacked first sheets 2a, 2a' (in other words, one of the two surfaces facing each other in the stacking direction).
  • the stacked second sheets 3a, 3a' are joined at their opposing inner surfaces.
  • the rear elastic member 6 is joined to one of the inner surfaces of the stacked second sheets 3a, 3a' (in other words, to one of the two surfaces facing each other in the stacking direction). This forms pockets P1, P2.
  • the joining of the absorbent body 4 to each of the first sheet 2a and the second sheet 3a in the first joining step (2) may also be performed in the second joining step (5).
  • the first sheets 2a and 2a' may be different types of sheets.
  • the second sheets 3a and 3a' may also be different types of sheets.
  • the recess 120b is formed in the anvil roller 120.
  • the recess for accommodating the absorber 4 may be formed in the vibration surface 110a of the ultrasonic horn 110, or in both the outer circumferential surface 120a and the vibration surface 110a.
  • the anvil roller 120 may be provided with a holding vacuum capable of adsorbing the sheet S to the outer circumferential surface 120a.
  • the front elastic member 5 and the rear elastic member 6 are rubber threads.
  • the front elastic member 5 and the rear elastic member 6 may be, for example, a stretchable film, etc., as long as they are elastic members arranged in a stretchable manner along the longitudinal direction of the front abdominal portion 2 or the rear back portion 3.
  • the disposable diaper 1 does not need to have the front elastic member 5 and the rear elastic member 6, so long as the front abdominal portion 2 and the rear dorsal portion 3 are stretchable along the longitudinal direction.
  • the front elastic member 5 is fixed to the first sheet 2a by joining the front elastic member 5 to one of the inner surfaces of the first sheet 2a folded in half.
  • the method of fixing the front elastic member 5 to the first sheet 2a is not limited to this.
  • the front elastic member 5 may be fixed to the first sheet 2a by forming welded parts on both sides in the width direction of the front elastic member 5 by welding the folded first sheet 2a to each other, and sandwiching the front elastic member 5 from the width direction by the welded parts.
  • the rear elastic member 6 may be fixed to the second sheet 3a by forming welded portions on both sides of the rear elastic member 6 in the width direction, in which the folded second sheet 3a is welded to each other, and sandwiching the rear elastic member 6 in the width direction at the welded portions.
  • the wearing article manufactured by the manufacturing device for wearing articles according to the first aspect of the present disclosure has an absorbent body and a waistband member.
  • the waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
  • the manufacturing device for the worn article is equipped with two clamping elements that sandwich the laminate in the stacking direction and bond the sheets together. At least one of the two clamping elements is formed with a recess that accommodates the absorbent body when the sheets are bonded together. The two clamping elements bond the sheets together in an area where the laminate and the absorbent body do not overlap.
  • the absorbent when the sheets are joined together, the absorbent is accommodated in the recess. This prevents the two clamping elements from clamping the absorbent, and suppresses the two clamping elements from moving due to the thickness of the absorbent. As a result, differences in the load (clamping pressure) acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet are suppressed.
  • this manufacturing device can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
  • the manufacturing device for worn articles according to the second aspect of the present disclosure is the manufacturing device for worn articles according to the first aspect, in which, when two clamping elements join sheets to one end and the other end of the absorbent body in the longitudinal direction, they simultaneously join the sheets at one end side of the absorbent body in the longitudinal direction and join the sheets at the other end side of the absorbent body in the longitudinal direction.
  • This manufacturing device uses a pair of clamping elements to simultaneously bond the absorbent body and the sheet, as well as bond the sheets together at both ends of the absorbent body in the longitudinal direction.
  • this manufacturing device can suppress the occurrence of poor bonding caused by the clamping element clamping both the absorbent body and the sheet while suppressing increases in the manufacturing costs of the device.
  • the apparatus for manufacturing a worn article according to a third aspect of the present disclosure is the apparatus for manufacturing a worn article according to the first or second aspect, and the worn article further includes an elastic member.
  • the elastic member is disposed inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
  • the manufacturing device for wearable articles according to the fourth aspect of the present disclosure is any one of the manufacturing devices for wearable articles according to the first to third aspects, in which the two clamping elements are an ultrasonic horn and an anvil.
  • the wearable part manufactured by the manufacturing method for a wearable article according to the fifth aspect of the present disclosure has an absorbent body and a waistband member.
  • the waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
  • the method for manufacturing a worn article includes a joining step in which the laminate is sandwiched in the stacking direction while the absorbent is accommodated in a recess formed in at least one of the two clamping elements, and the sheets are joined together in the area where the laminate and the absorbent do not overlap.
  • the absorbent when the sheets are joined together, the absorbent is accommodated in the recess. Therefore, the thickness of the absorbent moving between the two clamping elements prevents the two clamping elements from moving. As a result, differences in the load (clamping pressure) acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet are prevented from occurring.
  • the clamping elements because the clamping elements have a relatively simple structure with recesses formed on their surfaces, increases in the manufacturing costs of manufacturing equipment equipped with the clamping elements are also prevented.
  • this manufacturing method can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet without increasing the manufacturing costs of the manufacturing equipment.
  • the manufacturing method of a worn article according to the sixth aspect of the present disclosure is the manufacturing method of a worn article according to the fifth aspect, and in the joining step, when joining sheets to one end and the other end of the absorbent body in the longitudinal direction, the two clamping elements simultaneously join the sheets at one end side of the absorbent body in the longitudinal direction and join the sheets at the other end side of the absorbent body in the longitudinal direction.
  • This manufacturing method uses a pair of clamping elements to simultaneously bond the absorbent body and the sheet, as well as bond the sheets together at both ends of the absorbent body in the longitudinal direction.
  • this manufacturing method can prevent an increase in the manufacturing costs of the device while also preventing poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
  • the method for manufacturing a worn article according to the seventh aspect of the present disclosure is the method for manufacturing a worn article according to the fifth or sixth aspect, in which the worn article further includes an elastic member.
  • the elastic member is disposed inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
  • the method for manufacturing a wearable article according to the eighth aspect of the present disclosure is any one of the methods for manufacturing a wearable article according to the fifth aspect to the seventh aspect, in which the two clamping elements are an ultrasonic horn and an anvil.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

The purpose of the present invention is to provide a wearable article production device that is capable of suppressing the occurrence of bonding defects caused by a pinching element pinching together an absorber and a sheet, and to provide a wearable article production method in which the wearable article production device is used. This wearable article has an absorber and a waist member. The waist member is configured from a belt-form laminate made of stacked sheets. At least one longitudinal-direction end of the absorber is bonded to the waist member. The wearable article production device comprises two pinching elements that pinch the laminate in the stacking direction and bond the sheets to each other. At least one of the two pinching elements has a recess formed therein, the recess accommodating the absorber when the sheets are bonded to each other. The two pinching elements bond the sheets to each other in a region where the laminate and the absorber do not overlap.

Description

着用物品の製造装置及び着用物品の製造方法Apparatus and method for manufacturing worn articles
　本開示は、着用物品の製造装置及び着用物品の製造方法に関する。 The present disclosure relates to a manufacturing apparatus for wearable articles and a manufacturing method for wearable articles.
　特許文献１（特開平４－３５４９４８号公報）は、ウエスト開口部からの***物の漏れを防止する立体カフス（ポケット）を備えた使い捨てパンツ等の着用物品及びその製造方法を開示している。 Patent Document 1 (JP Patent Publication 4-354948) discloses a wearable article such as disposable pants with three-dimensional cuffs (pockets) that prevent the leakage of body waste from the waist opening, and a method for manufacturing the same.
　特許文献１が開示する着用物品は、バックシートと、トップシートと、バックシート及びトップシートの間に配置された吸収体とを備える。当該着用物品の立体カフスは、ウエスト開口部の内側に、吸収体に向かって延びるように設けられている。 The article disclosed in Patent Document 1 includes a back sheet, a top sheet, and an absorbent disposed between the back sheet and the top sheet. The three-dimensional cuffs of the article are provided on the inside of the waist opening and extend toward the absorbent.
　特許文献１の開示する着用物品の製造方法は、巻き出し装置から繰り出されたウェブ状のバックシートの上に間欠的に吸収体を配置する工程（吸収体配置工程）と、バックシートと吸収体の上にロールから繰り出されたトップシートを重ねる工程（重ね合わせ工程）と、カフス弾性部材を配置しバックシートの両端縁部で包む工程（カフス形成工程）と、ウエスト弾性部材を配置しバックシートの両端縁部で再び包む工程（ウエスト弾性部材配置工程）とを有する。 The method of manufacturing a worn article disclosed in Patent Document 1 includes a step of intermittently placing an absorbent body on a web-like back sheet unwound from a winding device (absorbent body placing step), a step of overlapping a top sheet unwound from a roll onto the back sheet and absorbent body (overlapping step), a step of placing cuff elastic members and wrapping them with both end edges of the back sheet (cuff forming step), and a step of placing waist elastic members and wrapping them again with both end edges of the back sheet (waist elastic member placing step).
　カフス形成工程では、カフス弾性部材を包むために、バックシートの端縁がバックシートの表面に接合される。また、ウエスト弾性部材配置工程でも、ウエスト弾性部材を包むために、バックシートの表面がトップシートの表面に接合される。カフス形成工程及びウエスト弾性部材配置工程では、バックシートやトップシートを挟圧要素（例えば、超音波溶着の場合であれば超音波ホーン及びアンビル）が挟圧することで接合が行われる。 In the cuff forming process, the edges of the backsheet are joined to the surface of the backsheet in order to encase the cuff elastic members. Also, in the waist elastic member placement process, the surface of the backsheet is joined to the surface of the topsheet in order to encase the waist elastic members. In the cuff forming process and waist elastic member placement process, the backsheet and topsheet are joined by clamping them with a clamping element (for example, an ultrasonic horn and anvil in the case of ultrasonic welding).
特開平４－３５４９４８号公報Japanese Patent Application Laid-Open No. 4-354948
　吸収体は、内部に吸収性コアが積層されているため、バックシート及びトップシートと比べて肉厚である。このため、挟圧要素を用いた接合が行われる工程において、挟圧要素がバックシートとともに吸収体を挟圧すると、吸収体とバックシートとの間の厚みの違いに起因してこれらに作用する加重（挟圧力）に差が発生し、好適な接合が妨げられるおそれがある。 The absorbent body is thicker than the back sheet and top sheet because an absorbent core is layered inside. Therefore, in the process of bonding using a clamping element, when the clamping element clamps the absorbent body together with the back sheet, a difference in the weight (clamping pressure) acting on the absorbent body and back sheet occurs due to the difference in thickness between them, which may prevent proper bonding.
　本開示は、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる着用物品の製造装置及びこれを用いた着用物品の製造方法を提供することを目的とする。 The present disclosure aims to provide a manufacturing device for wearable articles that can prevent poor bonding caused by a clamping element clamping both an absorbent body and a sheet, and a manufacturing method for wearable articles using the same.
　本願は、着用物品の製造装置を開示する。着用物品は、吸収体と胴回り部材とを有する。胴回り部材は、シートが積層された帯状の積層体から構成される。吸収体は、少なくとも長手方向における一端が、胴回り部材に接合される。 This application discloses an apparatus for manufacturing a worn article. The worn article has an absorbent body and a waistband member. The waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
　着用物品の製造装置は、積層体を積層方向において挟み、シートどうしを接合する２つの挟圧要素を備える。２つの挟圧要素は、少なくとも一方に、シートどうしが接合される際に吸収体を収容する凹部が形成される。２つの挟圧要素は、積層体と吸収体とが重ならない領域においてシートどうしを接合する。 The manufacturing device for the worn article is equipped with two clamping elements that sandwich the laminate in the stacking direction and bond the sheets together. At least one of the two clamping elements is formed with a recess that accommodates the absorbent body when the sheets are bonded together. The two clamping elements bond the sheets together in an area where the laminate and the absorbent body do not overlap.
　また、本願は、着用物品の製造方法を開示する。着用物品の製造方法は、２つの挟圧要素が少なくとも一方に形成された凹部に吸収体を収容しながら積層体を積層方向において挟み、積層体と吸収体とが重ならない領域においてシートどうしを接合する接合工程を有する。 The present application also discloses a method for manufacturing a worn article. The method for manufacturing a worn article includes a joining step in which two clamping elements sandwich a laminate in the stacking direction while accommodating an absorbent in a recess formed in at least one of the two clamping elements, and the sheets are joined together in an area where the laminate and the absorbent do not overlap.
　本開示に係る製造装置によれば、シートどうしが接合される際に、凹部に吸収体が収容される。このため、吸収体とシートと間の厚みの違いに起因して吸収体とシートとに作用する挟圧力に差が発生することが抑制される。 With the manufacturing device disclosed herein, the absorbent is accommodated in the recess when the sheets are joined together. This prevents differences in the clamping pressure acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet.
　したがって、本開示に係る製造装置及び製造方法によれば、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, the manufacturing apparatus and manufacturing method disclosed herein can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
使い捨ておむつ１の斜視図である。FIG. 1 is a perspective view of a disposable diaper 1. 使い捨ておむつ１を着用者の肌側となる面から見た展開図である。FIG. 2 is a development view of the disposable diaper 1 as seen from the surface facing the wearer's skin. 使い捨ておむつ１を着用者の肌に当たる面とは反対側の面から見た展開図である。FIG. 2 is a development view of the disposable diaper 1 as seen from the side opposite to the side that comes into contact with the wearer's skin. 使い捨ておむつ１を図１ＢのＡ－Ａ’で切断した断面図である。This is a cross-sectional view of the disposable diaper 1 taken along A-A' in Figure 1B. 使い捨ておむつ１の製造方法を示す概略工程図である。2 is a schematic process diagram showing a manufacturing method of the disposable diaper 1. FIG. 製造装置１００の斜視図である。FIG. 2 is a perspective view of the manufacturing apparatus 100. 製造装置１００の斜視図である。FIG. 2 is a perspective view of the manufacturing apparatus 100. 製造装置１００が吸収体４を収容する様子を時系列にしたがって示した概略断面図である。1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4. 製造装置１００が吸収体４を収容する様子を時系列にしたがって示した概略断面図である。1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4. 製造装置１００が吸収体４を収容する様子を時系列にしたがって示した概略断面図である。1A to 1C are schematic cross-sectional views showing a time series of how the manufacturing apparatus 100 stores the absorbent body 4. 図５Ｂに示された製造装置１００の概略平面図である。FIG. 5C is a schematic plan view of the manufacturing apparatus 100 shown in FIG. 5B. 変形例Ａに係る製造装置１００を用いた使い捨ておむつ１の製造方法を示す概略工程図である。10 is a schematic process diagram showing a manufacturing method of the disposable diaper 1 using the manufacturing apparatus 100 according to the modified example A. FIG.
　本開示の一実施形態に係る使い捨ておむつ１の製造方法及び使い捨ておむつ１の製造装置１００について説明する。 This section describes a method for manufacturing a disposable diaper 1 and an apparatus 100 for manufacturing a disposable diaper 1 according to one embodiment of the present disclosure.
　（１）使い捨ておむつ
　はじめに、使い捨ておむつ１について説明する。使い捨ておむつ１は、着用物品の一例である。図１Ａは、使い捨ておむつ１の斜視図である。図１Ｂは、使い捨ておむつ１を着用者の肌に当たる面から見た展開図である。図１Ｂは、使い捨ておむつ１を着用者の肌に当たる面とは反対側の面から見た展開図である。図１Ｃは、使い捨ておむつ１を図１ＢのＡ－Ａ’で切断した断面図である。使い捨ておむつ１は、前腹部２と、後背部３と、吸収体４と、前側弾性部材５と、後側弾性部材６と、ポケットＰ１、Ｐ２とを有する。 (1) Disposable Diaper First, a disposable diaper 1 will be described. The disposable diaper 1 is an example of a worn article. Fig. 1A is a perspective view of the disposable diaper 1. Fig. 1B is a developed view of the disposable diaper 1 as viewed from the surface that contacts the wearer's skin. Fig. 1B is a developed view of the disposable diaper 1 as viewed from the surface opposite to the surface that contacts the wearer's skin. Fig. 1C is a cross-sectional view of the disposable diaper 1 taken along line A-A' in Fig. 1B. The disposable diaper 1 has a front abdominal portion 2, a rear portion 3, an absorbent body 4, a front elastic member 5, a rear elastic member 6, and pockets P1 and P2.
　なお、以下では便宜上、着用者の肌に当たる面を肌側、着用者の肌に当たる面とは反対側の面を外側と呼ぶことがある。 For the sake of convenience, in the following, the side that touches the wearer's skin will be referred to as the "skin side," and the side opposite the side that touches the wearer's skin will be referred to as the "outer side."
　（１－１）前腹部
　前腹部２は、使い捨ておむつ１を着用者がはいた際に腹部の前側に位置する帯状の積層体である。前腹部２は、第１シート２ａを二つ折りして積層した積層体から構成される。第１シート２ａは、不織布を用いて形成される。前腹部２は、胴回り部材の一例である。 (1-1) Front Abdomen The front abdominal portion 2 is a band-shaped laminate that is located at the front of the abdomen when the wearer wears the disposable diaper 1. The front abdominal portion 2 is composed of a laminate in which a first sheet 2a is folded in half and laminated. The first sheet 2a is formed using a nonwoven fabric. The front abdominal portion 2 is an example of a waistband member.
　（１－２）後背部
　後背部３は、使い捨ておむつ１を着用者がはいた際に臀部の後側に位置する帯状の積層体である。後背部３は、第２シート３ａを二つ折りして積層した積層体から構成される。第２シート３ａは、不織布を用いて形成される。後背部３は、胴回り部材の一例である。 (1-2) Rear Section The rear section 3 is a band-shaped laminate that is positioned behind the buttocks when the wearer wears the disposable diaper 1. The rear section 3 is composed of a laminate in which the second sheet 3a is folded in half and laminated. The second sheet 3a is made of a nonwoven fabric. The rear section 3 is an example of a waistband member.
　前腹部２と後背部３とは、長手方向における端部どうしが互いに接合され、着用者の胴体が挿入されるウエスト開口部Ｗを形成する。 The front abdominal portion 2 and the rear back portion 3 are joined at their longitudinal ends to form a waist opening W into which the wearer's torso is inserted.
　（１－３）吸収体
　吸収体４は、使い捨ておむつ１を着用者がはいた際に股下に位置する帯状の積層体である。吸収体４は、着用者の尿等の体液を吸収する。吸収体４は、トップシート４ａと、カバーシート４ｂと、トップシート４ａ及びカバーシート４ｂ間に設けられた吸収性コア４ｃとを有する。吸収体４は、第１シート２ａ及び第２シート３ａよりも肉厚である。 (1-3) Absorbent Body The absorbent body 4 is a strip-shaped laminate located under the crotch of the wearer when the disposable diaper 1 is worn by the wearer. The absorbent body 4 absorbs body fluids such as urine of the wearer. The absorbent body 4 has a top sheet 4a, a cover sheet 4b, and an absorbent core 4c provided between the top sheet 4a and the cover sheet 4b. The absorbent body 4 is thicker than the first sheet 2a and the second sheet 3a.
　（１－３－１）トップシート及びカバーシート
　トップシート４ａは、肌側に設けられる帯状のシートである。カバーシート４ｂは、外側に設けられる帯状のシートである。トップシート４ａ及びカバーシート４ｂは同じ形状であり、端縁が互いに接合されている。 (1-3-1) Top sheet and cover sheet The top sheet 4a is a belt-shaped sheet provided on the skin side. The cover sheet 4b is a belt-shaped sheet provided on the outer side. The top sheet 4a and the cover sheet 4b have the same shape, and their edges are joined to each other.
　トップシート４ａは、透液性のシートである。トップシート４ａは、液体の透過を許容する不織布又はメッシュシートを用いて形成される。 The top sheet 4a is a liquid-permeable sheet. The top sheet 4a is made of a nonwoven fabric or mesh sheet that allows liquid to pass through.
　カバーシート４ｂは、通気性を有するシートである。カバーシート４ｂは、通気性を有するポリエチレンフィルムや撥水性及び通気性を有する不織布又はこれらの積層シートを用いて形成される。 The cover sheet 4b is a breathable sheet. The cover sheet 4b is made of a breathable polyethylene film, a water-repellent and breathable nonwoven fabric, or a laminated sheet of these.
　（１－３－２）吸収性コア
　吸収性コア４ｃは、トップシート４ａを通じて浸入した体液を吸収する。吸収性コア４ｃの平面形状は、トップシート４ａ及びカバーシート４ｂよりもわずかに小さい帯状である。吸収性コア４ｃは、端縁が接合されたトップシート４ａ及びカバーシート４ｂの内部に収容されている。 (1-3-2) Absorbent core The absorbent core 4c absorbs bodily fluids that have infiltrated through the top sheet 4a. The planar shape of the absorbent core 4c is a strip that is slightly smaller than the top sheet 4a and the cover sheet 4b. The absorbent core 4c is housed inside the top sheet 4a and the cover sheet 4b, the edges of which are joined.
　吸収性コア４ｃは、ロールパルプを粉砕して解繊したフラッフを積層することにより形成される。吸収性コア４ｃは、フラッフに高吸水性ポリマーを混合して形成されてもよい。また、吸収性コア４ｃは、フラッフを用いずに、不織布のみで構成したものや、高吸水性ポリマーが担持された不織布などであってもよい。 The absorbent core 4c is formed by layering fluff made by crushing roll pulp and defibrating it. The absorbent core 4c may be formed by mixing the fluff with a superabsorbent polymer. The absorbent core 4c may also be made of only nonwoven fabric without using fluff, or nonwoven fabric carrying a superabsorbent polymer.
　（１－４）前側弾性部材
　前側弾性部材５は、前腹部２の長手方向に沿って伸縮可能に配置される糸状の弾性部材である。本実施形態では、前側弾性部材５は、糸ゴムである。前側弾性部材５は、前腹部２の長手方向に沿って、前腹部２の内部（言い換えると、二つ折りされた第１シート２ａの間）に配置される。本実施形態では、１１本の前側弾性部材５が前腹部２の幅方向に沿って等間隔で配置される。前側弾性部材５の数は、１０本以下であってもよいし、１２本以上であってもよい。前側弾性部材５は、弾性部材の一例である。前側弾性部材５は、ポリウレタン、天然ゴム、熱可塑性樹脂等の材料を用いて形成される。 (1-4) Front Elastic Member The front elastic member 5 is a thread-like elastic member arranged to be stretchable along the longitudinal direction of the front abdominal portion 2. In this embodiment, the front elastic member 5 is rubber thread. The front elastic member 5 is arranged inside the front abdominal portion 2 (in other words, between the first sheet 2a folded in half) along the longitudinal direction of the front abdominal portion 2. In this embodiment, eleven front elastic members 5 are arranged at equal intervals along the width direction of the front abdominal portion 2. The number of front elastic members 5 may be ten or less, or twelve or more. The front elastic member 5 is an example of an elastic member. The front elastic member 5 is formed using a material such as polyurethane, natural rubber, or thermoplastic resin.
　（１－５）後側弾性部材
　後側弾性部材６は、後背部３の長手方向に沿って伸縮可能に配置される糸状の弾性部材である。本実施形態では、後側弾性部材６は、糸ゴムである。後側弾性部材６は、後背部３の長手方向に沿って、後背部３の内部（言い換えると、二つ折りされた第２シート３ａの間）に配置される。本実施形態では、１１本の後側弾性部材６が後背部３の幅方向に沿って等間隔で配置される。後側弾性部材６の数は、１０本以下であってもよいし、１２本以上であってもよい。後側弾性部材６は、弾性部材の一例である。後側弾性部材６は、ポリウレタン、天然ゴム、熱可塑性樹脂等の材料を用いて形成される。 (1-5) Rear Elastic Member The rear elastic member 6 is a thread-like elastic member arranged to be stretchable along the longitudinal direction of the rear portion 3. In this embodiment, the rear elastic member 6 is rubber thread. The rear elastic member 6 is arranged inside the rear portion 3 (in other words, between the folded second sheet 3a) along the longitudinal direction of the rear portion 3. In this embodiment, eleven rear elastic members 6 are arranged at equal intervals along the width direction of the rear portion 3. The number of the rear elastic members 6 may be ten or less, or twelve or more. The rear elastic member 6 is an example of an elastic member. The rear elastic member 6 is formed using a material such as polyurethane, natural rubber, or thermoplastic resin.
　（１－６）ポケット
　ポケットＰ１、Ｐ２は、着用者の***物がウエスト開口部Ｗから漏れることを防止するポケットである。ポケットＰ１、Ｐ２は、使い捨ておむつ１を着用者がはいた際に下方に開口するように形成される。より詳細には、ポケットＰ１は、肌側の第１シート２ａの、平面視において吸収体４と重なる領域に形成される。ポケットＰ２は、肌側の第２シート３ａの、平面視において吸収体４と重なる領域に形成される。ポケットＰ１、Ｐ２は、図１Ｂにおいて斜線のハッチングで示された領域である。 (1-6) Pockets The pockets P1 and P2 are pockets that prevent the wearer's excrement from leaking from the waist opening W. The pockets P1 and P2 are formed so as to open downward when the wearer wears the disposable diaper 1. More specifically, the pocket P1 is formed in an area of the skin-side first sheet 2a that overlaps with the absorbent body 4 in a plan view. The pocket P2 is formed in an area of the skin-side second sheet 3a that overlaps with the absorbent body 4 in a plan view. The pockets P1 and P2 are areas indicated by diagonal hatching in FIG. 1B.
　（１－７）各部の接合について
　詳細な説明は後述するが、本実施形態では、以下で説明する使い捨ておむつ１各部の接合は、超音波溶着を用いて行われる。 (1-7) Joining of Each Part Although detailed description will be given later, in this embodiment, joining of each part of the disposable diaper 1 described below is performed by ultrasonic welding.
　（１－７－１）前腹部と後背部との接合
　前腹部２の長手方向における一端２ｂと後背部３の長手方向における一端３ｂとは、互いに接合される。また、前腹部２の長手方向における他端２ｃと後背部３の長手方向における他端３ｃとは、互いに接合される。これにより、前腹部２と後背部３とが環状に接続され、使い捨ておむつ１のウエスト開口部Ｗが形成される。 (1-7-1) Joining of the Front Abdomen and the Rear Section One end 2b in the longitudinal direction of the front abdominal section 2 and one end 3b in the longitudinal direction of the rear section 3 are joined to each other. The other end 2c in the longitudinal direction of the front abdominal section 2 and the other end 3c in the longitudinal direction of the rear section 3 are joined to each other. In this way, the front abdominal section 2 and the rear section 3 are connected in a ring shape, and the waist opening W of the disposable diaper 1 is formed.
　（１－７－２）吸収体と前腹部及び後背部との接合
　吸収体４は、長手方向における一端４ｅａが前腹部２に接合され、長手方向における他端４ｅｂが後背部３に接合される。 (1-7-2) Joining of Absorbent Body to Front Abdominal Section and Rear Section The absorbent body 4 has one end 4ea in the longitudinal direction joined to the front abdominal section 2 and the other end 4eb in the longitudinal direction joined to the rear section 3.
　より詳細には、吸収体４の一端４ｅａは、前腹部２の長手方向の略中央において、二つ折りされた第１シート２ａの間に挿入される。二つ折りされた第１シート２ａの間に挿入された吸収体４の一端４ｅａは、外側の第１シート２ａに接合される。 More specifically, one end 4ea of the absorbent body 4 is inserted between the folded first sheet 2a at approximately the center in the longitudinal direction of the front abdominal portion 2. The one end 4ea of the absorbent body 4 inserted between the folded first sheet 2a is joined to the outer first sheet 2a.
　また、吸収体４の他端４ｅｂは、後背部３の長手方向の略中央において、二つ折りされた第２シート３ａの間に挿入される。二つ折りされた第２シート３ａの間に挿入された吸収体４の他端４ｅｂは、外側の第２シート３ａに接合される。 The other end 4eb of the absorbent 4 is inserted between the folded second sheets 3a at approximately the center of the longitudinal direction of the rear portion 3. The other end 4eb of the absorbent 4 inserted between the folded second sheets 3a is joined to the outer second sheet 3a.
　（１－７－３）第１シート２ａ及び第２シート３ａの接合
　二つ折りで積層された第１シート２ａは、対向する面（内面）どうしが吸収体４の一端４ｅａと重ならない領域において接合される。これにより、第１シート２ａの肌側であって、平面視において吸収体４の一端４ｅａと重なる領域は、ポケットＰ１となる。 (1-7-3) Joining of the first sheet 2a and the second sheet 3a The first sheet 2a, which is folded in half and laminated, is joined in a region where the opposing surfaces (inner surfaces) do not overlap with one end 4ea of the absorbent body 4. As a result, the region on the skin side of the first sheet 2a that overlaps with one end 4ea of the absorbent body 4 in a plan view becomes a pocket P1.
　二つ折りで積層された第２シート３ａは、内面どうしが吸収体４の他端４ｅｂと重ならない領域において接合される。これにより、第２シート３ａの肌側であって、平面視において吸収体４の他端４ｅｂと重なる領域は、ポケットＰ２となる。 The second sheet 3a, which is folded in half and laminated, is joined in a region where the inner surfaces do not overlap with the other end 4eb of the absorbent body 4. As a result, the area on the skin side of the second sheet 3a that overlaps with the other end 4eb of the absorbent body 4 in a plan view becomes the pocket P2.
　（１－７－４）前腹部と前側弾性部材との接合及び後背部と後側弾性部材との接合
　前腹部２の内部に配置された前側弾性部材５は、二つ折りされた第１シート２ａの内面のいずれか（言い換えると、積層方向において対向する２つの面のいずれか）と、平面視において吸収体４の一端４ｅａとが重ならない領域において接合される。これにより、前側弾性部材５は、第１シート２ａに対して固定される。 (1-7-4) Joining between the front abdominal portion and the front elastic member, and joining between the rear portion and the rear elastic member The front elastic member 5 arranged inside the front abdominal portion 2 is joined to one of the inner surfaces of the folded first sheet 2a (in other words, one of the two surfaces facing each other in the stacking direction) in a region where one end 4ea of the absorbent body 4 does not overlap in a plan view. This fixes the front elastic member 5 to the first sheet 2a.
　後背部３の内部に配置された後側弾性部材６は、二つ折りされた第２シート３ａの内面のいずれか（言い換えると、積層方向において対向する２つの面のいずれか）と、平面視において吸収体４の他端４ｅｂとが重ならない領域において接合される。これにより、後側弾性部材６は、第２シート３ａに対して固定される。 The rear elastic member 6 arranged inside the rear portion 3 is joined to one of the inner surfaces of the folded second sheet 3a (in other words, one of the two surfaces facing each other in the stacking direction) in an area where the other end 4eb of the absorbent body 4 does not overlap in a plan view. This fixes the rear elastic member 6 to the second sheet 3a.
　（２）使い捨ておむつの製造方法
　次に、使い捨ておむつ１の製造方法について説明する。使い捨ておむつ１の製造方法は、第１シート及び第２シート形成工程（１）と、第１接合工程（２）と、前側弾性部材及び後側弾性部材配置工程（３）と、第１二つ折り工程（４）と、第２接合工程（５）と、第２二つ折り工程（６）と、第３接合工程（７）と、切断工程（８）とを含む。図２は、使い捨ておむつ１の製造方法を示す概略工程図である。 (2) Manufacturing Method of Disposable Diaper Next, a manufacturing method of the disposable diaper 1 will be described. The manufacturing method of the disposable diaper 1 includes a first sheet and a second sheet forming step (1), a first joining step (2), a front elastic member and a rear elastic member arranging step (3), a first folding step (4), a second joining step (5), a second folding step (6), a third joining step (7), and a cutting step (8). Fig. 2 is a schematic process diagram showing the manufacturing method of the disposable diaper 1.
　（２－１）第１シート及び第２シート形成工程
　第１シート及び第２シート形成工程（１）では、前腹部２を形成するための第１シート２ａと後背部３を形成するための第２シート３ａとが形成される。 (2-1) First Sheet and Second Sheet Forming Step In the first sheet and second sheet forming step (1), a first sheet 2a for forming the front abdominal portion 2 and a second sheet 3a for forming the rear portion 3 are formed.
　本工程では、はじめに、第１シート２ａ及び第２シート３ａの素材であるロール状のシートＳが展開される。展開されたシートＳは、幅方向の略中央に配置されたカッタ（図示省略）で、長手方向に沿って第１シート２ａと第２シート３ａとに切断される。第１シート２ａと第２シート３ａとは、切断工程（８）まで所定の大きさの張力をかけられながら、長手方向に沿って送られる。 In this process, first, a roll-shaped sheet S, which is the material for the first sheet 2a and the second sheet 3a, is unfolded. The unfolded sheet S is cut into the first sheet 2a and the second sheet 3a along the longitudinal direction by a cutter (not shown) located approximately in the center of the width direction. The first sheet 2a and the second sheet 3a are fed along the longitudinal direction while being subjected to a predetermined amount of tension until the cutting process (8).
　シートＳからカットされた第１シート２ａ及び第２シート３ａは、シートＳの幅方向中心においてシートＳの長手方向に沿って延びる中心線ＣＬから幅方向における外方（図２の矢印参照）に向かって拡幅される。この後、第１シート２ａと第２シート３ａは、第２二つ折り工程（６）の前まで、互いに平行に長手方向に沿って送られる。 The first sheet 2a and second sheet 3a cut from the sheet S are expanded in width from a center line CL that extends along the longitudinal direction of the sheet S at the center of the width of the sheet S toward the outside in the width direction (see the arrow in Figure 2). After this, the first sheet 2a and second sheet 3a are fed parallel to each other in the longitudinal direction until just before the second folding process (6).
　本実施形態では、カッタは、平面視においてＳ字（波形）を描きながら長手方向に延びる切断面をシートＳに形成する。この場合、第１シート２ａ及び第２シート３ａそれぞれの切断面が中心線ＣＬに対して線対称となるように、位相合わせが行われる。 In this embodiment, the cutter forms a cut surface in the sheet S that extends in the longitudinal direction while drawing an S-shape (wave shape) in a plan view. In this case, phase alignment is performed so that the cut surfaces of the first sheet 2a and the second sheet 3a are symmetrical with respect to the center line CL.
　（２－２）第１接合工程
　第１接合工程（２）では、吸収体４が第１シート２ａ及び第２シート３ａのそれぞれに接合される。 (2-2) First Bonding Step In the first bonding step (2), the absorbent body 4 is bonded to each of the first sheet 2a and the second sheet 3a.
　本工程では、はじめに、平面視において、吸収体４の一端４ｅａが第１シート２ａに重なり、吸収体４の他端４ｅｂが第２シート３ａに重なるように、吸収体４が配置される。その後、吸収体４の一端４ｅａが第１シート２ａに接合され、吸収体４の他端４ｅｂが第２シート３ａに接合される。 In this process, first, the absorbent body 4 is positioned so that, in a plan view, one end 4ea of the absorbent body 4 overlaps the first sheet 2a and the other end 4eb of the absorbent body 4 overlaps the second sheet 3a. After that, one end 4ea of the absorbent body 4 is joined to the first sheet 2a, and the other end 4eb of the absorbent body 4 is joined to the second sheet 3a.
　（２－３）前側弾性部材及び後側弾性部材配置工程
　前側弾性部材及び後側弾性部材配置工程（３）では、前側弾性部材５が第１シート２ａの上に第１シート２ａの長手方向に沿って配置される。同様に、後側弾性部材６も第２シート３ａの上に第２シート３ａの長手方向に沿って配置される。 (2-3) Front Elastic Member and Rear Elastic Member Arrangement Step In the front elastic member and rear elastic member arrangement step (3), the front elastic member 5 is arranged on the first sheet 2a along the longitudinal direction of the first sheet 2a. Similarly, the rear elastic member 6 is arranged on the second sheet 3a along the longitudinal direction of the second sheet 3a.
　（２－４）第１二つ折り工程
　第１二つ折り工程（４）では、第１シート２ａ及び第２シート３ａのそれぞれが、幅方向における端縁どうしが平面視において重なるように幅方向において二つ折りにされる。より詳細には、第１シート２ａ及び第２シート３ａのそれぞれは、中心線ＣＬから遠い端縁が中心線ＣＬに近い方の端縁と重なるように二つ折りにされる。この結果、第１シート２ａを二つ折りして積層した積層体と、第２シート３ａを二つ折りして積層した積層体とが形成される。 (2-4) First folding in half process In the first folding in half process (4), the first sheet 2a and the second sheet 3a are each folded in half in the width direction such that their widthwise edges overlap in a plan view. More specifically, the first sheet 2a and the second sheet 3a are each folded in half such that the edge farther from the center line CL overlaps the edge closer to the center line CL. As a result, a laminate in which the first sheet 2a is folded in half and stacked, and a laminate in which the second sheet 3a is folded in half and stacked are formed.
　これにより、吸収体４の一端４ｅａ及び前側弾性部材５は、２つ折りにされた第１シート２ａの積層体の内部に配置された状態となる。また、吸収体４の他端４ｅｂ及び後側弾性部材６は、２つ折りにされた第２シート３ａの積層体の内部に配置された状態となる。 As a result, one end 4ea of the absorbent body 4 and the front elastic member 5 are disposed inside the laminate of the first sheet 2a folded in half. The other end 4eb of the absorbent body 4 and the rear elastic member 6 are disposed inside the laminate of the second sheet 3a folded in half.
　（２－５）第２接合工程
　第２接合工程（５）では、後述する使い捨ておむつ１の製造装置１００を用いて、第１シート２ａどうしと第１シート２ａ及び前側弾性部材５とがそれぞれ第１シート２ａと吸収体４とが重ならない領域において接合される。同様に、第２シート３ａどうしと第２シート３ａ及び後側弾性部材６とがそれぞれ第２シート３ａと吸収体４とが重ならない領域において接合される。より詳細には、第１シート２ａは、互いに対向する内面どうしが接合される。前側弾性部材５は、二つ折りされた第１シート２ａの内面のいずれかに接合される。第２シート３ａ、互いに対向する内面どうしが接合される。後側弾性部材６は、二つ折りされた第２シート３ａの内面のいずれかに接合される。これにより、ポケットＰ１、Ｐ２が形成される。 (2-5) Second Bonding Step In the second bonding step (5), the first sheets 2a are bonded to each other, and the first sheets 2a and the front elastic member 5 are bonded to each other in the areas where the first sheets 2a do not overlap with the absorbent body 4, using a manufacturing apparatus 100 for the disposable diaper 1 described later. Similarly, the second sheets 3a are bonded to each other, and the second sheets 3a and the rear elastic member 6 are bonded to each other in the areas where the second sheets 3a do not overlap with the absorbent body 4. More specifically, the first sheets 2a are bonded to each other at their opposing inner surfaces. The front elastic member 5 is bonded to one of the inner surfaces of the first sheet 2a folded in half. The second sheets 3a are bonded to each other at their opposing inner surfaces. The rear elastic member 6 is bonded to one of the inner surfaces of the second sheet 3a folded in half. In this way, pockets P1 and P2 are formed.
　第１接合工程（２）における、第１シート２ａ及び第２シート３ａのそれぞれへの吸収体４の接合は、第２接合工程（５）において行われてもよい。具体的には、第１シート及び第２シート形成工程（１）の後の工程では、第１シート２ａ及び第２シート３ａ上への吸収体４の配置のみが行われる。その後、第２接合工程（５）において、製造装置１００を用いて、吸収体４の一端４ｅａが第１シート２ａに接合され、吸収体４の他端４ｅｂが第２シート３ａに接合される。この際、第１シート２ａどうしの接合、第１シート２ａ及び前側弾性部材５の接合、第２シート３ａどうしの接合、及び第２シート３ａ及び後側弾性部材６の接合も同時に行われる。 The joining of the absorbent body 4 to each of the first sheet 2a and the second sheet 3a in the first joining step (2) may be performed in the second joining step (5). Specifically, in the step following the first and second sheet forming step (1), only the arrangement of the absorbent body 4 on the first sheet 2a and the second sheet 3a is performed. Then, in the second joining step (5), one end 4ea of the absorbent body 4 is joined to the first sheet 2a, and the other end 4eb of the absorbent body 4 is joined to the second sheet 3a using the manufacturing device 100. At this time, the joining of the first sheets 2a to each other, the joining of the first sheet 2a to the front elastic member 5, the joining of the second sheets 3a to each other, and the joining of the second sheet 3a to the rear elastic member 6 are also performed simultaneously.
　（２－６）第２二つ折り工程
　第２二つ折り工程（６）では、第１シート２ａと第２シート３ａとが平面視において重なるように、吸収体４が長手方向の中央において折り曲げられる。 (2-6) Second Bifolding Step In the second bifolding step (6), the absorbent body 4 is folded at the center in the longitudinal direction so that the first sheet 2a and the second sheet 3a overlap in a plan view.
　（２－７）第３接合工程
　第３接合工程（７）では、平面視において隣り合う２つの吸収体４の中央において、第１シート２ａと第２シート３ａとが幅方向にわたり接合されたサイドシール部ＳＳが形成される。 (2-7) Third Bonding Step In the third bonding step (7), a side seal portion SS is formed in which the first sheet 2a and the second sheet 3a are bonded across the width in the center of two adjacent absorbents 4 in a plan view.
　（２－８）切断工程
　切断工程（８）では、サイドシール部形成工程（７）において形成されたサイドシール部ＳＳの幅方向中央において、第１シート２ａと第２シート３ａとが内部の前側弾性部材５と後側弾性部材６とともに切断される。これにより、第１シート２ａが前腹部２となり、第２シート３ａが後背部３となり、この結果、使い捨ておむつ１が形成される。 (2-8) Cutting Step In the cutting step (8), the first sheet 2a and the second sheet 3a are cut at the widthwise center of the side seal portion SS formed in the side seal portion forming step (7) together with the internal front elastic member 5 and rear elastic member 6. As a result, the first sheet 2a becomes the front abdominal portion 2 and the second sheet 3a becomes the rear portion 3, thereby forming the disposable diaper 1.
　（３）使い捨ておむつの製造装置
　次に、上述した使い捨ておむつ１の製造方法の第２接合工程（５）で用いられる使い捨ておむつ１の製造装置１００について説明する。 (3) Manufacturing Apparatus for Disposable Diaper Next, a manufacturing apparatus 100 for the disposable diaper 1 used in the second joining step (5) of the manufacturing method for the disposable diaper 1 described above will be described.
　（３－１）概要
　製造装置１００は、超音波ホーン１１０と、アンビルローラ１２０とを備える。図３は、超音波ホーン１１０の斜視図である。図４は、アンビルローラ１２０の斜視図である。 (3-1) Overview The manufacturing apparatus 100 includes an ultrasonic horn 110 and an anvil roller 120. Fig. 3 is a perspective view of the ultrasonic horn 110. Fig. 4 is a perspective view of the anvil roller 120.
　図５Ａ、図５Ｂ、及び図５Ｃは、製造装置１００が吸収体４を収容する様子を時系列にしたがって示した概略断面図である。図６は、図５Ｂに示された製造装置１００の概略平面図である。 FIGS. 5A, 5B, and 5C are schematic cross-sectional views showing the manufacturing apparatus 100 storing the absorbent body 4 in chronological order. FIG. 6 is a schematic plan view of the manufacturing apparatus 100 shown in FIG. 5B.
　超音波ホーン１１０及びアンビルローラ１２０は、第１シート２ａからなる積層体を積層方向において挟み、第１シート２ａどうしと第１シート２ａの内面のいずれか及び前側弾性部材５をそれぞれ第１シート２ａと吸収体４とが重ならない領域において接合する。また、超音波ホーン１１０及びアンビルローラ１２０は、第２シート３ａからなる積層体を積層方向において挟み、第２シート３ａどうしと第２シート３の内面のいずれか及び後側弾性部材６をそれぞれ第２シート３ａと吸収体４とが重ならない領域において接合する。超音波ホーン１１０及びアンビルローラ１２０は、挟圧要素の一例である。 The ultrasonic horn 110 and the anvil roller 120 sandwich the laminate made of the first sheet 2a in the stacking direction, and bond the first sheets 2a together, any of the inner surfaces of the first sheets 2a, and the front elastic member 5 in the areas where the first sheets 2a do not overlap with the absorbent body 4. The ultrasonic horn 110 and the anvil roller 120 sandwich the laminate made of the second sheet 3a in the stacking direction, and bond the second sheets 3a together, any of the inner surfaces of the second sheets 3a, and the rear elastic member 6 in the areas where the second sheets 3a do not overlap with the absorbent body 4. The ultrasonic horn 110 and the anvil roller 120 are an example of a clamping element.
　第２接合工程（５）において、第１シート２ａ及び第２シート３ａのそれぞれへ吸収体４が接合される場合は、超音波ホーン１１０及びアンビルローラ１２０は、さらに、吸収体４の一端４ｅａ及び第１シート２ａと、吸収体４の他端４ｅｂ及び第２シート３ａとをそれぞれ接合する。 In the second bonding step (5), when the absorbent body 4 is bonded to each of the first sheet 2a and the second sheet 3a, the ultrasonic horn 110 and the anvil roller 120 further bond one end 4ea of the absorbent body 4 to the first sheet 2a and the other end 4eb of the absorbent body 4 to the second sheet 3a, respectively.
　（３－１－１）超音波ホーン
　超音波ホーン１１０は、超音波振動を第１シート２ａ、第２シート３ａ、前側弾性部材５、及び後側弾性部材６へ付与する。 (3-1-1) Ultrasonic Horn The ultrasonic horn 110 applies ultrasonic vibrations to the first sheet 2 a, the second sheet 3 a, the front elastic member 5, and the rear elastic member 6.
　超音波ホーン１１０は、第１シート２ａ及び第２シート３ａの両方に接触して、超音波振動する振動面１１０ａを有する。振動面１１０ａは、所定幅の帯状の面である。振動面１１０ａは、第１シート２ａ及び第２シート３ａの幅方向に長手方向が沿うように配置される。また、振動面１１０ａは、第１シート２ａ及び第２シート３ａの両方に同時に接触できる長さに形成されている。本実施形態では、振動面１１０ａは、第１シート２ａ及び第２シート３ａそれぞれの外側に接するように配置される。 The ultrasonic horn 110 has a vibration surface 110a that contacts both the first sheet 2a and the second sheet 3a and vibrates ultrasonically. The vibration surface 110a is a strip-shaped surface of a predetermined width. The vibration surface 110a is arranged so that its longitudinal direction is aligned with the width direction of the first sheet 2a and the second sheet 3a. The vibration surface 110a is also formed to a length that allows it to contact both the first sheet 2a and the second sheet 3a simultaneously. In this embodiment, the vibration surface 110a is arranged so that it contacts the outer sides of each of the first sheet 2a and the second sheet 3a.
　（３－１－２）アンビルローラ
　アンビルローラ１２０は、第１シート２ａ、第２シート３ａ、前側弾性部材５、及び後側弾性部材６を超音波ホーン１１０とともに挟むように配置される。アンビルローラ１２０は、円筒状であって、図示しない駆動部が発生する駆動力により中心軸１２０ｃを中心に回転する。 (3-1-2) Anvil Roller The anvil roller 120 is disposed so as to sandwich the first sheet 2a, the second sheet 3a, the front elastic member 5, and the rear elastic member 6 together with the ultrasonic horn 110. The anvil roller 120 is cylindrical, and rotates about a central axis 120c by a driving force generated by a driving unit (not shown).
　アンビルローラ１２０は、中心軸１２０ｃが振動面１１０ａの長手方向に沿い、かつ、第１シート２ａ、第２シート３ａ、前側弾性部材５、及び後側弾性部材６を挟んで振動面１１０ａと対向する位置に配置される。アンビルローラ１２０の半径は、アンビルローラ１２０の外周面１２０ａが第１シート２ａ及び第２シート３ａに接触する大きさに設定される。アンビルローラ１２０の軸方向における長さは、第１シート２ａ及び第２シート３ａの両方に同時に接触できる長さに形成される。本実施形態では、アンビルローラ１２０の外周面１２０ａは、第１シート２ａ及び第２シート３ａそれぞれの肌側に接するように配置される。 The anvil roller 120 is positioned such that its central axis 120c is aligned along the longitudinal direction of the vibration surface 110a and faces the vibration surface 110a across the first sheet 2a, the second sheet 3a, the front elastic member 5, and the rear elastic member 6. The radius of the anvil roller 120 is set to a size that allows the outer circumferential surface 120a of the anvil roller 120 to contact the first sheet 2a and the second sheet 3a. The length of the anvil roller 120 in the axial direction is formed to a length that allows it to contact both the first sheet 2a and the second sheet 3a simultaneously. In this embodiment, the outer circumferential surface 120a of the anvil roller 120 is positioned so that it contacts the skin side of each of the first sheet 2a and the second sheet 3a.
　アンビルローラ１２０は、外周面１２０ａに、第２接合工程（５）において吸収体４を収容する凹部１２０ｂが形成されている。凹部１２０ｂは、第２接合工程（５）において吸収体４を収容しながら、第１シート２ａと吸収体４とが重ならない領域において第１シート２ａどうしと第１シート２ａ及び前側弾性部材５とを接合し、第２シート３ａと吸収体４とが重ならない領域において第２シート３ａどうしと第２シート３ａ及び後側弾性部材６とを接合できる形状に形成される（図６参照）。 The anvil roller 120 has a recess 120b formed on its outer circumferential surface 120a for accommodating the absorbent 4 in the second joining step (5). The recess 120b is formed in a shape that can accommodate the absorbent 4 in the second joining step (5), while bonding the first sheets 2a together and the first sheet 2a and the front elastic member 5 in the area where the first sheets 2a and the absorbent 4 do not overlap, and bond the second sheets 3a together and the second sheet 3a and the rear elastic member 6 in the area where the second sheets 3a and the absorbent 4 do not overlap (see FIG. 6).
　第２接合工程（５）において、第１シート２ａ及び第２シート３ａのそれぞれへ吸収体４が接合される場合、凹部１２０ｂは、第２接合工程（５）において吸収体４の一部を収容しながら、さらに、吸収体４の一端４ｅａ及び第１シート２ａと、吸収体４の他端４ｅｂ及び第２シート３ａを接合できる形状に形成される。 When the absorbent 4 is joined to each of the first sheet 2a and the second sheet 3a in the second joining step (5), the recess 120b is formed into a shape that can accommodate a portion of the absorbent 4 in the second joining step (5) while also joining one end 4ea of the absorbent 4 and the first sheet 2a, and the other end 4eb of the absorbent 4 and the second sheet 3a.
　図示しない駆動部は、製造工程において第１シート２ａ及び第２シート３ａが送られる速度に連動させてアンビルローラ１２０を回転させる。また、駆動部は、第２接合工程（５）において吸収体４が振動面１１０ａとアンビルローラ１２０との間を移動する際に、凹部１２０ｂが吸収体４の少なくとも一部を収容するように、アンビルローラ１２０を回転する（図５Ａ、図５Ｂ、図５Ｃ、図６参照）。 A drive unit (not shown) rotates the anvil roller 120 in conjunction with the speed at which the first sheet 2a and the second sheet 3a are fed in the manufacturing process. The drive unit also rotates the anvil roller 120 so that the recess 120b accommodates at least a portion of the absorbent 4 when the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding process (5) (see Figures 5A, 5B, 5C, and 6).
　（４）特徴
　（４－１）
　製造装置１００は、使い捨ておむつ１を製造する装置である。使い捨ておむつ１は、吸収体３と、前腹部２及び後背部３（胴回り部材）とを有する。前腹部２は、第１シート２ａが二つ折りで積層された帯状の積層体から構成される。後背部３は、第２シート３ａが二つ折りで積層された帯状の積層体から構成される。吸収体４は、少なくとも長手方向における一端が、前腹部２及び後背部３に接合される。 (4) Features (4-1)
The manufacturing apparatus 100 is an apparatus for manufacturing a disposable diaper 1. The disposable diaper 1 has an absorbent body 3, a front abdominal portion 2, and a rear portion 3 (waistline member). The front abdominal portion 2 is composed of a strip-shaped laminate in which a first sheet 2a is folded in half and laminated. The rear portion 3 is composed of a strip-shaped laminate in which a second sheet 3a is folded in half and laminated. At least one end of the absorbent body 4 in the longitudinal direction is joined to the front abdominal portion 2 and the rear portion 3.
　製造装置１００は、前腹部２を構成する積層体及び後背部３を構成する積層体を積層方向において挟み、第１シート２ａどうし及び第２シート３ａどうしをそれぞれ接合する２つの挟圧要素である超音波ホーン１１０及びアンビルローラ１２０を備える。２つの挟圧要素は、少なくとも一方（本実施形態では、アンビルローラ１２０）に、第１シート２ａどうし及び第２シート３ａどうしが接合される際に吸収体４を収容する凹部１２０ｂが形成されている。２つの挟圧要素は、前腹部２を構成する積層体及び後背部３を構成する積層体と吸収体４とが重ならない領域において第１シート２ａどうし及び第２シート３ａどうしをそれぞれ接合する。 The manufacturing device 100 is equipped with two clamping elements, an ultrasonic horn 110 and an anvil roller 120, which sandwich the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 in the stacking direction and bond the first sheets 2a together and the second sheets 3a together, respectively. At least one of the two clamping elements (in this embodiment, the anvil roller 120) has a recess 120b that accommodates the absorbent body 4 when the first sheets 2a together and the second sheets 3a together are bonded. The two clamping elements bond the first sheets 2a together and the second sheets 3a together in areas where the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 do not overlap with the absorbent body 4.
　製造装置１００によれば、第２接合工程（５）において吸収体４が振動面１１０ａとアンビルローラ１２０との間を移動する際に、凹部１２０ｂに吸収体４の少なくとも一部が収容される。これにより、超音波ホーン１１０とアンビルローラ１２０とが吸収体４を挟圧することが回避されるため、吸収体４の厚みにより超音波ホーン１１０及び／またはアンビルローラ１２０が移動することが抑制される。この結果、吸収体４と第１シート２ａ及び第２シート３ａとの間の厚みの違いに起因して吸収体４と第１シート２ａ及び第２シート３ａとに作用する加重（挟圧力）に差が発生すること抑制される。 According to the manufacturing apparatus 100, when the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding step (5), at least a portion of the absorbent 4 is accommodated in the recess 120b. This prevents the ultrasonic horn 110 and the anvil roller 120 from clamping the absorbent 4, thereby suppressing the movement of the ultrasonic horn 110 and/or the anvil roller 120 due to the thickness of the absorbent 4. As a result, differences in the load (clamping pressure) acting on the absorbent 4 and the first sheet 2a and second sheet 3a due to differences in thickness between the absorbent 4 and the first sheet 2a and second sheet 3a are suppressed.
　したがって、製造装置１００によれば、超音波ホーン１１０とアンビルローラ１２０とが吸収体４と第１シート２ａ及び第２シート３ａとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, the manufacturing device 100 can prevent poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together.
　（４－２）
　２つの挟圧要素は、吸収体４の長手方向における一端４ｅａ及び他端４ｅｂに第１シート２ａ及び第２シート３ａのそれぞれを接合する際に、吸収体４の長手方向における一端４ｅａ側の第１シート２ａどうしの接合と、吸収体４の長手方向における他端４ｅｂ側の第２シート３ａどうしの接合とを同時に行ってもよい。 (4-2)
When joining the first sheet 2a and the second sheet 3a to one end 4ea and the other end 4eb in the longitudinal direction of the absorbent body 4, respectively, the two clamping elements may simultaneously join the first sheets 2a on the one end 4ea side of the absorbent body 4 in the longitudinal direction and join the second sheets 3a on the other end 4eb side of the absorbent body 4 in the longitudinal direction.
　第２接合工程（５）においては、超音波ホーン１１０とアンビルローラ１２０とが吸収体４と第１シート２ａ及び第２シート３ａとを挟圧することに起因する接合不良の発生を抑制するために、第１シート２ａどうしを接合する挟圧要素と、第２シート３ａどうしを接合する挟圧要素とを別に設け、これらを吸収体４に接触しないように離れた位置に配置することができる。しかしながら、製造装置をこのように構成した場合、２つの挟圧要素を設ける必要があるため、装置の製造コストが増加する。 In the second bonding step (5), in order to prevent poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent 4 and the first sheet 2a and second sheet 3a, a clamping element for bonding the first sheets 2a together and a clamping element for bonding the second sheets 3a together can be provided separately and positioned away from the absorbent 4 so as not to come into contact with the absorbent 4. However, when the manufacturing apparatus is configured in this way, it is necessary to provide two clamping elements, which increases the manufacturing costs of the apparatus.
　製造装置１００によれば、一対の超音波ホーン１１０とアンビルローラ１２０とを用いて、吸収体４と第１シート２ａ及び第２シート３ａとの接合とともに、第１シート２ａどうしの接合及び第２シート３ａどうしの接合を同時にできる。 The manufacturing device 100 uses a pair of ultrasonic horns 110 and anvil rollers 120 to simultaneously bond the absorbent body 4 to the first sheet 2a and the second sheet 3a, as well as bond the first sheets 2a together and the second sheets 3a together.
　したがって、製造装置１００によれば、装置の製造コストの増加を抑制しながら、超音波ホーン１１０とアンビルローラ１２０とが吸収体４と第１シート２ａ及び第２シート３ａとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, the manufacturing device 100 can suppress the occurrence of poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together while suppressing an increase in the manufacturing cost of the device.
　（４－３）
　使い捨ておむつ１は、前側弾性部材５及び後側弾性部材６をさらに有する。前側弾性部材５は、前腹部２の長手方向に沿って伸縮可能に、前腹部２の内部に配置された弾性部材である。後側弾性部材６は、後背部３の長手方向に沿って伸縮可能に、後背部３の内部に配置された弾性部材である。 (4-3)
The disposable diaper 1 further has a front elastic member 5 and a rear elastic member 6. The front elastic member 5 is an elastic member arranged inside the front abdominal portion 2 so as to be stretchable along the longitudinal direction of the front abdominal portion 2. The rear elastic member 6 is an elastic member arranged inside the rear portion 3 so as to be stretchable along the longitudinal direction of the rear portion 3.
　（４－４）
　使い捨ておむつ１の製造方法は、２つの挟圧要素である超音波ホーン１１０及びアンビルローラ１２０の少なくとも一方（本実施形態では、アンビルローラ１２０）に形成された凹部１２０ｂに吸収体４を収容しながら前腹部２を構成する積層体及び後背部３を構成する積層体を積層方向において挟み、前腹部２を構成する積層体及び後背部３を構成する積層体と吸収体４とが重ならない領域において第１シート２ａどうし及び第２シート３ａどうしをそれぞれ接合する第２接合工程（５）を有する。 (4-4)
The manufacturing method of the disposable diaper 1 includes a second joining step (5) of clamping the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 in the stacking direction while accommodating the absorbent 4 in a recess 120b formed in at least one of the two clamping elements, the ultrasonic horn 110 and the anvil roller 120 (in this embodiment, the anvil roller 120), and joining the first sheets 2a to each other and the second sheets 3a to each other in areas where the laminate constituting the front abdominal portion 2 and the laminate constituting the rear portion 3 do not overlap with the absorbent 4.
　本製造方法によれば、第２接合工程（５）において吸収体４が振動面１１０ａとアンビルローラ１２０との間を移動する際に、凹部１２０ｂに吸収体４の少なくとも一部が収容される。これにより、超音波ホーン１１０とアンビルローラ１２０とが吸収体４を挟圧することが回避されるため、吸収体４の厚みにより超音波ホーン１１０及び／またはアンビルローラ１２０が移動することが抑制される。この結果、吸収体４と第１シート２ａ及び第２シート３ａとの間の厚みの違いに起因して吸収体４と第１シート２ａ及び第２シート３ａとに作用する加重（挟圧力）に差が発生することが抑制される。 According to this manufacturing method, when the absorbent 4 moves between the vibration surface 110a and the anvil roller 120 in the second bonding step (5), at least a portion of the absorbent 4 is accommodated in the recess 120b. This prevents the ultrasonic horn 110 and the anvil roller 120 from clamping the absorbent 4, thereby suppressing the movement of the ultrasonic horn 110 and/or the anvil roller 120 due to the thickness of the absorbent 4. As a result, differences in the load (clamping pressure) acting on the absorbent 4 and the first sheet 2a and second sheet 3a due to differences in thickness between the absorbent 4 and the first sheet 2a and second sheet 3a are suppressed.
　したがって、本製造方法によれば、超音波ホーン１１０とアンビルローラ１２０とが吸収体４と第１シート２ａ及び第２シート３ａとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, this manufacturing method can prevent poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping and pressing the absorbent body 4 and the first sheet 2a and second sheet 3a together.
　（４－５）
　第２接合工程（５）において、２つの挟圧要素は、吸収体４の長手方向における一端４ｅａ及び他端４ｅａに第１シート２ａ及び第２シート３ａのそれぞれを接合する際に、吸収体４の長手方向における一端４ｅａ側の第１シート２ａどうしの接合と、吸収体４の長手方向における他端４ｅｂ側の第２シート３ａどうしの接合とを同時に行う。 (4-5)
In the second joining step (5), when the two clamping elements join the first sheet 2a and the second sheet 3a to one end 4ea and the other end 4ea in the longitudinal direction of the absorbent body 4, respectively, they simultaneously join the first sheets 2a on the one end 4ea side of the absorbent body 4 in the longitudinal direction and join the second sheets 3a on the other end 4eb side of the absorbent body 4 in the longitudinal direction.
　本製造方法によれば、一対の超音波ホーン１１０とアンビルローラ１２０とを用いて、吸収体４と第１シート２ａ及び第２シート３ａとの接合に加えて、第１シート２ａどうしの接合及び第２シート３ａどうしの接合を同時にできる。 According to this manufacturing method, a pair of ultrasonic horns 110 and anvil rollers 120 can be used to bond the absorbent body 4 to the first sheet 2a and the second sheet 3a, as well as to simultaneously bond the first sheets 2a together and the second sheets 3a together.
　したがって、本製造方法によれば、製造コストの増加を抑制しながら、超音波ホーン１１０とアンビルローラ１２０とが吸収体４と第１シート２ａ及び第２シート３ａとをともに挟圧することに起因する接合不良の発生を抑制することができる。 Therefore, this manufacturing method can suppress the occurrence of poor bonding caused by the ultrasonic horn 110 and the anvil roller 120 clamping the absorbent body 4 and the first sheet 2a and second sheet 3a together while suppressing increases in manufacturing costs.
　（４－６）
　挟圧要素は、超音波ホーン１１０及びアンビルローラ１２０である。 (4-6)
The pinching elements are an ultrasonic horn 110 and an anvil roller 120 .
　（５）変形例
　（５－１）変形例Ａ
　上記実施形態では、前腹部２及び後背部３は、二つ折りした第１シート２ａ及び第２シート３ａのそれぞれを切断することで形成された。しかしながら、前腹部２は、複数の第１シート２ａ、２ａ’を積層して、切断工程（８）で切断することにより形成されてもよい。また、後背部３は、複数の第２シート３ａ、３ａ’を積層して、切断工程（８）で切断することにより形成されてもよい。 (5) Modifications (5-1) Modification A
In the above embodiment, the front portion 2 and the rear portion 3 are formed by cutting the first sheet 2a and the second sheet 3a, which are folded in half. However, the front portion 2 may be formed by stacking a plurality of the first sheets 2a, 2a' and cutting them in the cutting step (8). The rear portion 3 may be formed by stacking a plurality of the second sheets 3a, 3a' and cutting them in the cutting step (8).
　図７は、変形例Ａに係る製造装置１００を用いた使い捨ておむつ１の製造方法を示す概略工程図である。以下では、上記実施形態に係る使い捨ておむつ１の製造方法と変形例Ａに係る製造装置１００を用いた使い捨ておむつ１の製造方法との相違点を中心に説明する。なお、同一又は対応する構成については、同一の参照符号を付して適宜説明を省略する。 FIG. 7 is a schematic process diagram showing a method for manufacturing a disposable diaper 1 using the manufacturing apparatus 100 relating to variant A. The following will focus on the differences between the manufacturing method for a disposable diaper 1 according to the above embodiment and the manufacturing method for a disposable diaper 1 using the manufacturing apparatus 100 relating to variant A. Note that the same or corresponding components will be given the same reference symbols and descriptions will be omitted as appropriate.
　（５－１－１）第１シート及び第２シート形成工程
　第１シート及び第２シート形成工程（１）’では、前腹部２を形成するための第１シート２ａ、２ａ’と後背部３を形成するための第２シート３ａ、３ａ’とが形成される。 (5-1-1) First Sheet and Second Sheet Forming Step In the first sheet and second sheet forming step (1)', first sheets 2a, 2a' for forming the front abdominal portion 2 and second sheets 3a, 3a' for forming the rear portion 3 are formed.
　第１シート及び第２シート形成工程（１）’では、２つのロール状のシートＳ１、Ｓ１’がそれぞれ展開され、第１シート２ａ、２ａ’及び第２シート３ａ、３ａ’が形成される。より詳細には、シートＳ１からは、外側となる第１シート２ａ及び第２シート３ａが形成される。シートＳ２からは、肌側となる第１シート２ａ’及び第２シート３ａ’が形成される。なお、肌側となる第１シート２ａ及び第２シート３ａに、Ｓ字（波形）は形成されない。 In the first sheet and second sheet forming process (1)', two roll-shaped sheets S1 and S1' are unfolded to form the first sheets 2a, 2a' and the second sheets 3a, 3a'. More specifically, the first sheet 2a and the second sheet 3a, which will be the outer side, are formed from sheet S1. The first sheet 2a' and the second sheet 3a', which will be the skin side, are formed from sheet S2. Note that no S-shape (wave shape) is formed in the first sheet 2a and the second sheet 3a, which will be the skin side.
　（５－１－２）第１接合工程
　第１接合工程（２）’では、外側となる第１シート２ａ及び第２シート３ａのそれぞれに吸収体４が接合される。 (5-1-2) First Bonding Step In the first bonding step (2)', the absorbent body 4 is bonded to each of the first sheet 2a and the second sheet 3a which are to be the outer sides.
　（５－１－３）前側弾性部材及び後側弾性部材配置工程
　前側弾性部材及び後側弾性部材配置工程（３）’では、外側となる第１シート２ａの上に前側弾性部材５が第１シート２ａの長手方向に沿って配置される。同様に、外側となる第２シート３ａの上に後側弾性部材６が第２シート３ａの長手方向に沿って配置される。 In the front elastic member and rear elastic member arranging step (3)', the front elastic member 5 is arranged on the first sheet 2a, which is the outer side, in the longitudinal direction of the first sheet 2a. Similarly, the rear elastic member 6 is arranged on the second sheet 3a, which is the outer side, in the longitudinal direction of the second sheet 3a.
　（５－１－４）積層工程
　積層工程（４）’では、外側となる第１シート２ａ及び第２シート３ａに、肌側となる第１シート２ａ’及び第２シート３ａ’が、平面視において重なるように積層される。これにより、吸収体４の一端４ｅａ及び前側弾性部材５は、積層された２枚の第１シート２ａ、２ａ’の内部に配置された状態となる。また、吸収体４の他端４ｅｂ及び後側弾性部材６は、積層された２枚の第２シート３ａ、３ａ’の内部に配置された状態となる。 (5-1-4) Lamination process In the lamination process (4)', the first sheet 2a' and the second sheet 3a' that are the skin side are laminated so as to overlap the first sheet 2a and the second sheet 3a that are the outer side in a plan view. As a result, one end 4ea of the absorbent body 4 and the front elastic member 5 are arranged inside the two laminated first sheets 2a, 2a'. In addition, the other end 4eb of the absorbent body 4 and the rear elastic member 6 are arranged inside the two laminated second sheets 3a, 3a'.
　（５－１－５）第２接合工程
　第２接合工程（５）’では、使い捨ておむつ１の製造装置１００を用いて、積層された２枚の第１シート２ａ、２ａ’どうしと第１シート２ａ、２ａ’及び前側弾性部材５とがそれぞれ第１シート２ａ、２ａ’と吸収体４とが重ならない領域において接合される。同様に、使い捨ておむつ１の製造装置１００を用いて、積層された２枚の第２シート３ａ、３ａ’どうしと第２シート３ａ、３ａ’及び後側弾性部材６とがそれぞれ第２シート３ａ、３ａ’と吸収体４とが重ならない領域において接合される。より詳細には、積層された第１シート２ａ、２ａ’どうしは、互いに対向する内面どうしが接合される。前側弾性部材５は、積層された第１シート２ａ、２ａ’の内面のいずれか（言い換えると、積層方向において対向する２つの面のいずれか）に接合される。積層された第２シート３ａ、３ａ’どうしは、互いに対向する内面どうしが接合される。後側弾性部材６は、積層された第２シート３ａ、３ａ’の内面のいずれか（言い換えると、積層方向において対向する２つの面のいずれか）に接合される。これにより、ポケットＰ１、Ｐ２が形成される。 (5-1-5) Second Bonding Step In the second bonding step (5)', the manufacturing apparatus 100 for the disposable diaper 1 is used to bond the two stacked first sheets 2a, 2a' to each other, and the first sheets 2a, 2a' and the front elastic member 5 in the areas where the first sheets 2a, 2a' do not overlap with the absorbent 4. Similarly, the manufacturing apparatus 100 for the disposable diaper 1 is used to bond the two stacked second sheets 3a, 3a' to each other, and the second sheets 3a, 3a' and the rear elastic member 6 in the areas where the second sheets 3a, 3a' do not overlap with the absorbent 4. More specifically, the stacked first sheets 2a, 2a' are bonded to each other at their inner surfaces facing each other. The front elastic member 5 is bonded to one of the inner surfaces of the stacked first sheets 2a, 2a' (in other words, one of the two surfaces facing each other in the stacking direction). The stacked second sheets 3a, 3a' are joined at their opposing inner surfaces. The rear elastic member 6 is joined to one of the inner surfaces of the stacked second sheets 3a, 3a' (in other words, to one of the two surfaces facing each other in the stacking direction). This forms pockets P1, P2.
　変形例Ａに係る製造装置１００も、第１接合工程（２）における、第１シート２ａ及び第２シート３ａのそれぞれへの吸収体４の接合が、第２接合工程（５）において行われてもよい。 In the manufacturing apparatus 100 according to variant A, the joining of the absorbent body 4 to each of the first sheet 2a and the second sheet 3a in the first joining step (2) may also be performed in the second joining step (5).
　以降の第２二つ折り工程（６）、第３接合工程（７）、及び切断工程（８）については、上記実施形態と同様であるため説明を省略する。 The subsequent second folding process (6), third joining process (7), and cutting process (8) are the same as in the above embodiment, so explanations will be omitted.
　なお、第１シート２ａ、２ａ’は、互いに異なる種類のシートであってもよい。また、第２シート３ａ、３ａ’も、互いに異なる種類のシートであってもよい。 The first sheets 2a and 2a' may be different types of sheets. The second sheets 3a and 3a' may also be different types of sheets.
　（５－２）変形例Ｂ
　上記実施形態では、アンビルローラ１２０に凹部１２０ｂが形成された。しかしながら、吸収体４を収容する凹部は、超音波ホーン１１０の振動面１１０ａ、又は外周面１２０ａと振動面１１０ａとの両方に形成されてもよい。 (5-2) Modification B
In the above embodiment, the recess 120b is formed in the anvil roller 120. However, the recess for accommodating the absorber 4 may be formed in the vibration surface 110a of the ultrasonic horn 110, or in both the outer circumferential surface 120a and the vibration surface 110a.
　（５－３）変形例Ｃ
　アンビルローラ１２０は、外周面１２０ａにシートＳを吸着できる保持バキュームを備えてもよい。 (5-3) Modification C
The anvil roller 120 may be provided with a holding vacuum capable of adsorbing the sheet S to the outer circumferential surface 120a.
　（５－４）変形例Ｄ
　上記実施形態では、挟圧要素は超音波溶着により各部の接合を行った。しかしながら、挟圧要素は、熱シール、接着等の超音波溶着以外の方法により各部の接合を行ってもよい。 (5-4) Modification D
In the above embodiment, the respective parts of the clamping element are joined by ultrasonic welding, however, the respective parts of the clamping element may be joined by a method other than ultrasonic welding, such as heat sealing or adhesion.
　（５－５）変形例Ｅ
　上記実施形態では、前側弾性部材５及び後側弾性部材６は、糸ゴムであった。しかしながら、前側弾性部材５及び後側弾性部材６は、前腹部２又は後背部３の長手方向に沿って伸縮可能に配置される弾性部材であれば、例えば伸縮性フィルム等であってもよい。 (5-5) Modification E
In the above embodiment, the front elastic member 5 and the rear elastic member 6 are rubber threads. However, the front elastic member 5 and the rear elastic member 6 may be, for example, a stretchable film, etc., as long as they are elastic members arranged in a stretchable manner along the longitudinal direction of the front abdominal portion 2 or the rear back portion 3.
　また、使い捨ておむつ１は、前腹部２及び後背部３が長手方向に沿って伸縮可能であれば、前側弾性部材５及び後側弾性部材６を有していなくてもよい。 Furthermore, the disposable diaper 1 does not need to have the front elastic member 5 and the rear elastic member 6, so long as the front abdominal portion 2 and the rear dorsal portion 3 are stretchable along the longitudinal direction.
　（５－６）変形例Ｆ
　上述した実施形態では、前側弾性部材５と二つ折りされた第１シート２ａの内面のいずれかとを接合することで、前側弾性部材５は、第１シート２ａに対して固定された。しかしながら、第１シート２ａに対する前側弾性部材５の固定方法は、これに限定されない。例えば、前側弾性部材５の幅方向における両側に、二つ折りされた第１シート２ａを互いに溶着した溶着部を形成し、当該溶着部で前側弾性部材５を幅方向から挟むことで、第１シート２ａに対して前側弾性部材５を固定してもよい。 (5-6) Modification F
In the above-described embodiment, the front elastic member 5 is fixed to the first sheet 2a by joining the front elastic member 5 to one of the inner surfaces of the first sheet 2a folded in half. However, the method of fixing the front elastic member 5 to the first sheet 2a is not limited to this. For example, the front elastic member 5 may be fixed to the first sheet 2a by forming welded parts on both sides in the width direction of the front elastic member 5 by welding the folded first sheet 2a to each other, and sandwiching the front elastic member 5 from the width direction by the welded parts.
　同様に、後側弾性部材６の幅方向における両側に、二つ折りされた第２シート３ａを互いに溶着した溶着部を形成し、当該溶着部で後側弾性部材６を幅方向から挟むことで、第２シート３ａに対して後側弾性部材６を固定してもよい。 Similarly, the rear elastic member 6 may be fixed to the second sheet 3a by forming welded portions on both sides of the rear elastic member 6 in the width direction, in which the folded second sheet 3a is welded to each other, and sandwiching the rear elastic member 6 in the width direction at the welded portions.
　（６）まとめ
　最後に、上述した実施形態から把握できる技術的思想について記載する。 (6) Summary Finally, the technical ideas that can be understood from the above-described embodiments will be described.
　本開示の第１観点に係る着用物品の製造装置が製造する着用物品は、吸収体と胴回り部材とを有する。胴回り部材は、シートが積層された帯状の積層体から構成される。吸収体は、少なくともの長手方向における一端が、胴回り部材に接合される。 The wearing article manufactured by the manufacturing device for wearing articles according to the first aspect of the present disclosure has an absorbent body and a waistband member. The waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
　着用物品の製造装置は、積層体を積層方向において挟み、シートどうしを接合する２つの挟圧要素を備える。２つの挟圧要素は、少なくとも一方に、シートどうしが接合される際に吸収体を収容する凹部が形成される。２つの挟圧要素は、積層体と吸収体とが重ならない領域においてシートどうしを接合する。 The manufacturing device for the worn article is equipped with two clamping elements that sandwich the laminate in the stacking direction and bond the sheets together. At least one of the two clamping elements is formed with a recess that accommodates the absorbent body when the sheets are bonded together. The two clamping elements bond the sheets together in an area where the laminate and the absorbent body do not overlap.
　本開示に係る製造装置によれば、シートどうしが接合される際に、凹部に吸収体が収容される。これにより、２つの挟圧要素が吸収体を挟圧することが回避されるため、吸収体の厚みにより２つの挟圧要素が移動することが抑制される。この結果、吸収体とシートとの間の厚みの違いに起因して吸収体とシートとに作用する加重（挟圧力）に差が発生することが抑制される。 In the manufacturing device disclosed herein, when the sheets are joined together, the absorbent is accommodated in the recess. This prevents the two clamping elements from clamping the absorbent, and suppresses the two clamping elements from moving due to the thickness of the absorbent. As a result, differences in the load (clamping pressure) acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet are suppressed.
　したがって、本製造装置によれば、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, this manufacturing device can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
　本開示の第２観点に係る着用物品の製造装置は、第１観点に係る着用物品の製造装置であって、２つの挟圧要素が、吸収体の長手方向における一端及び他端にシートを接合する際に、吸収体の長手方向における一端側のシートどうしの接合と、吸収体の長手方向における他端側のシートどうしの接合とを同時に行う。 The manufacturing device for worn articles according to the second aspect of the present disclosure is the manufacturing device for worn articles according to the first aspect, in which, when two clamping elements join sheets to one end and the other end of the absorbent body in the longitudinal direction, they simultaneously join the sheets at one end side of the absorbent body in the longitudinal direction and join the sheets at the other end side of the absorbent body in the longitudinal direction.
　本製造装置によれば、一対の挟圧要素を用いて、吸収体とシートとの接合とともに、吸収体の長手方向における両端でのシートどうしの接合を同時に行いうる。 This manufacturing device uses a pair of clamping elements to simultaneously bond the absorbent body and the sheet, as well as bond the sheets together at both ends of the absorbent body in the longitudinal direction.
　したがって、本製造装置よれば、装置の製造コストの増加を抑制しながら、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, this manufacturing device can suppress the occurrence of poor bonding caused by the clamping element clamping both the absorbent body and the sheet while suppressing increases in the manufacturing costs of the device.
　本開示の第３観点に係る着用物品の製造装置は、第１観点又は第２観点に係る着用物品の製造装置であって、着用物品は、弾性部材をさらに有する。弾性部材は、胴回り部材の長手方向に沿って伸縮可能に、胴回り部材の内部に配置される。 The apparatus for manufacturing a worn article according to a third aspect of the present disclosure is the apparatus for manufacturing a worn article according to the first or second aspect, and the worn article further includes an elastic member. The elastic member is disposed inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
　本開示の第４観点に係る着用物品の製造装置は、第１観点から第３観点に係る着用物品の製造装置のいずれかであって、２つの挟圧要素が、超音波ホーン及びアンビルである。 The manufacturing device for wearable articles according to the fourth aspect of the present disclosure is any one of the manufacturing devices for wearable articles according to the first to third aspects, in which the two clamping elements are an ultrasonic horn and an anvil.
　本開示の第５観点に係る着用物品の製造方法により製造される着用部品は、吸収体と胴回り部材とを有する。胴回り部材は、シートが積層された帯状の積層体から構成される。吸収体は、少なくとも長手方向における一端が、胴回り部材に接合される。 The wearable part manufactured by the manufacturing method for a wearable article according to the fifth aspect of the present disclosure has an absorbent body and a waistband member. The waistband member is composed of a strip-shaped laminate in which sheets are stacked. At least one end of the absorbent body in the longitudinal direction is joined to the waistband member.
　着用物品の製造方法は、２つの挟圧要素が少なくとも一方に形成された凹部に吸収体を収容しながら積層体を積層方向において挟み、積層体と吸収体とが重ならない領域においてシートどうしを接合する接合工程を有する。 The method for manufacturing a worn article includes a joining step in which the laminate is sandwiched in the stacking direction while the absorbent is accommodated in a recess formed in at least one of the two clamping elements, and the sheets are joined together in the area where the laminate and the absorbent do not overlap.
　本開示に係る製造方法によれば、シートどうしが接合される際に、凹部に吸収体が収容される。このため、２つの挟圧要素の間を移動する吸収体の厚みにより、２つの挟圧要素が移動することが抑制される。この結果、吸収体とシートとの間の厚みの違いに起因して吸収体とシートとに作用する加重（挟圧力）に差が発生することが抑制される。また、挟圧要素が、表面に凹部を形成した比較的単純な構造であるため、挟圧要素を備える製造装置の製造コストが増大することも抑制される。 According to the manufacturing method disclosed herein, when the sheets are joined together, the absorbent is accommodated in the recess. Therefore, the thickness of the absorbent moving between the two clamping elements prevents the two clamping elements from moving. As a result, differences in the load (clamping pressure) acting on the absorbent and the sheet due to differences in thickness between the absorbent and the sheet are prevented from occurring. In addition, because the clamping elements have a relatively simple structure with recesses formed on their surfaces, increases in the manufacturing costs of manufacturing equipment equipped with the clamping elements are also prevented.
　したがって、本製造方法によれば、製造装置の製造コストを増大させることなく、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, this manufacturing method can prevent poor bonding caused by the clamping element clamping both the absorbent body and the sheet without increasing the manufacturing costs of the manufacturing equipment.
　本開示の第６観点に係る着用物品の製造方法は、第５観点に係る着用物品の製造方法であって、接合工程において、２つの挟圧要素は、吸収体の長手方向における一端及び他端にシートを接合する際に、吸収体の長手方向における一端側のシートどうしの接合と、吸収体の長手方向における他端側のシートどうしの接合とを同時に行う。 The manufacturing method of a worn article according to the sixth aspect of the present disclosure is the manufacturing method of a worn article according to the fifth aspect, and in the joining step, when joining sheets to one end and the other end of the absorbent body in the longitudinal direction, the two clamping elements simultaneously join the sheets at one end side of the absorbent body in the longitudinal direction and join the sheets at the other end side of the absorbent body in the longitudinal direction.
　本製造方法によれば、一対の挟圧要素を用いて、吸収体とシートとの接合とともに、吸収体の長手方向における両端でのシートどうしの接合を同時に行いうる。 This manufacturing method uses a pair of clamping elements to simultaneously bond the absorbent body and the sheet, as well as bond the sheets together at both ends of the absorbent body in the longitudinal direction.
　したがって、本製造方法よれば、装置の製造コストの増加を抑制しながら、挟圧要素が吸収体とシートとをともに挟圧することに起因する接合不良の発生を抑制できる。 Therefore, this manufacturing method can prevent an increase in the manufacturing costs of the device while also preventing poor bonding caused by the clamping element clamping both the absorbent body and the sheet.
　本開示の第７観点に係る着用物品の製造方法は、第５観点又は第６観点に係る着用物品の製造方法であって、着用物品は、弾性部材をさらに有する。弾性部材は、胴回り部材の長手方向に沿って伸縮可能に、胴回り部材の内部に配置される。 The method for manufacturing a worn article according to the seventh aspect of the present disclosure is the method for manufacturing a worn article according to the fifth or sixth aspect, in which the worn article further includes an elastic member. The elastic member is disposed inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
　本開示の第８観点に係る着用物品の製造方法は、第５観点から第７観点に係る着用物品の製造方法のいずれかであって、２つの挟圧要素が、超音波ホーン及びアンビルである。 The method for manufacturing a wearable article according to the eighth aspect of the present disclosure is any one of the methods for manufacturing a wearable article according to the fifth aspect to the seventh aspect, in which the two clamping elements are an ultrasonic horn and an anvil.
２　　　　：前腹部（胴回り部材）
２ａ　　　：第１シート（シート）
３　　　　：後背部（胴回り部材）
３ａ　　　：第２シート（シート）
４　　　　：吸収体
５　　　　：前側弾性部材（弾性部材）
６　　　　：後側弾性部材（弾性部材）
１００　　：製造装置
１１０　　：超音波ホーン（挟圧要素）
１２０　　：アンビルローラ（挟圧要素）
１２０ｂ　：凹部 2: Front abdomen (body circumference member)
2a: First sheet (sheet)
3: Back part (body part)
3a: Second sheet (sheet)
4: absorbent body 5: front elastic member (elastic member)
6: Rear elastic member (elastic member)
100: Manufacturing device 110: Ultrasonic horn (clamping element)
120: Anvil roller (pressure element)
120b: Recess

Claims (8)

  1. 　吸収体と胴回り部材とを有し、
    　前記胴回り部材は、シートが積層された帯状の積層体から構成され、
    　前記吸収体は、少なくとも長手方向における一端が、前記胴回り部材に接合される着用物品の製造装置であって、
    　前記積層体を積層方向において挟み、前記シートどうしを接合する２つの挟圧要素を備え、
    　２つの前記挟圧要素は、
    　　少なくとも一方に、前記シートどうしが接合される際に前記吸収体を収容する凹部が形成され、
    　　前記積層体と前記吸収体とが重ならない領域において前記シートどうしを接合する、
    着用物品の製造装置。     The absorbent body and the waistband member are included.
    The waistband member is composed of a strip-shaped laminate in which sheets are laminated,
    The absorbent body has at least one end in a longitudinal direction joined to the waistband member,
    The laminate is sandwiched between two clamping elements that bond the sheets together in a stacking direction;
    The two clamping elements are
    A recess for accommodating the absorbent body when the sheets are joined together is formed on at least one of the sheets;
    The sheets are joined together in an area where the laminate and the absorbent body do not overlap.
    Equipment for manufacturing worn articles.
  2. 　２つの前記挟圧要素は、
    　前記吸収体の長手方向における一端及び他端に前記シートを接合する際に、
    　前記吸収体の長手方向における一端側の前記シートどうしの接合と、
    前記吸収体の長手方向における他端側の前記シートどうしの接合とを同時に行う、
    請求項１に記載の着用物品の製造装置。     The two clamping elements are
    When the sheet is joined to one end and the other end in the longitudinal direction of the absorbent body,
    Joining the sheets together at one end side in the longitudinal direction of the absorbent body;
    and simultaneously joining the sheets at the other end side in the longitudinal direction of the absorbent body.
    The apparatus for manufacturing the worn article according to claim 1 .
  3. 　前記着用物品は、
    　前記胴回り部材の長手方向に沿って伸縮可能に、前記胴回り部材の内部に配置された弾性部材をさらに有する、
    請求項１または２に記載の着用物品の製造装置。     The wearing article includes:
    Further comprising an elastic member arranged inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
    The apparatus for manufacturing the worn article according to claim 1 or 2.
  4. 　２つの前記挟圧要素は、
    　　超音波ホーン及びアンビルである、
    請求項１から３のいずれか１項に記載の着用物品の製造装置。     The two clamping elements are
    an ultrasonic horn and an anvil;
    The apparatus for manufacturing a worn article according to claim 1 .
  5. 　吸収体と胴回り部材とを有し、
    　前記胴回り部材は、シートが積層された帯状の積層体から構成され、
    　前記吸収体は、少なくとも長手方向における一端が、前記胴回り部材に接合され着用物品の製造方法であって、
    　２つの挟圧要素が少なくとも一方に形成された凹部に前記吸収体を収容しながら前記積層体を積層方向において挟み、前記積層体と前記吸収体とが重ならない領域において前記シートどうしを接合する接合工程を有する、
    着用物品の製造方法。     The absorbent body and the waistband member are included.
    The waistband member is composed of a strip-shaped laminate in which sheets are laminated,
    a method for manufacturing a wearing article, the method comprising the steps of: joining at least one end in a longitudinal direction of the absorbent body to the waistband member;
    a joining step of sandwiching the laminate in a stacking direction while accommodating the absorbent body in a recess formed in at least one of the two sandwiching elements, and joining the sheets together in an area where the laminate and the absorbent body do not overlap,
    A method for manufacturing a worn article.
  6. 　前記接合工程において、
    　２つの前記挟圧要素は、
    　　前記吸収体の長手方向における一端及び他端に前記シートを接合する際に、
    　　前記吸収体の長手方向における一端側の前記シートどうしの接合と、
    　　前記吸収体の長手方向における他端側の前記シートどうしの接合とを同時に行う、
    請求項５に記載の着用物品の製造方法。     In the joining step,
    The two clamping elements are
    When the sheet is joined to one end and the other end in the longitudinal direction of the absorbent body,
    Joining the sheets together at one end side in the longitudinal direction of the absorbent body;
    and simultaneously joining the sheets at the other end side in the longitudinal direction of the absorbent body.
    A method for producing the wearing article according to claim 5.
  7. 　前記着用物品は、
    　　前記胴回り部材の長手方向に沿って伸縮可能に、前記胴回り部材の内部に配置された弾性部材をさらに有する、
    請求項５または６に記載の着用物品の製造方法。      The wearing article includes:
    Further comprising an elastic member arranged inside the waistband member so as to be stretchable along the longitudinal direction of the waistband member.
    A method for producing the wearing article according to claim 5 or 6.
  8. 　２つの前記挟圧要素は、
    　　超音波ホーン及びアンビルである、
    請求項５から７のいずれか１項に記載の着用物品の製造方法。     The two clamping elements are
    an ultrasonic horn and an anvil;
    A method for producing the wearing article according to any one of claims 5 to 7.
PCT/JP2023/035792 2022-09-29 2023-09-29 Wearable article production device and wearable article production method WO2024071423A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004187721A (en) * 2002-12-06 2004-07-08 Kao Corp Sealing device and cutter device for manufacturing absorbent article
JP2013172893A (en) * 2012-02-27 2013-09-05 Oji Nepia Co Ltd Disposable diaper and method for manufacturing disposable diaper
WO2021168473A1 (en) * 2020-02-17 2021-08-26 Curt G. Joa, Inc. An elastic composite structure for an absorbent sanitary product and an apparatus and method for making said elastic composite structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004187721A (en) * 2002-12-06 2004-07-08 Kao Corp Sealing device and cutter device for manufacturing absorbent article
JP2013172893A (en) * 2012-02-27 2013-09-05 Oji Nepia Co Ltd Disposable diaper and method for manufacturing disposable diaper
WO2021168473A1 (en) * 2020-02-17 2021-08-26 Curt G. Joa, Inc. An elastic composite structure for an absorbent sanitary product and an apparatus and method for making said elastic composite structure

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