WO2015064418A1 - Procédé de production de corps en feuilles fusionnées et dispositif d'assemblage de feuilles - Google Patents

Procédé de production de corps en feuilles fusionnées et dispositif d'assemblage de feuilles Download PDF

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Publication number
WO2015064418A1
WO2015064418A1 PCT/JP2014/077926 JP2014077926W WO2015064418A1 WO 2015064418 A1 WO2015064418 A1 WO 2015064418A1 JP 2014077926 W JP2014077926 W JP 2014077926W WO 2015064418 A1 WO2015064418 A1 WO 2015064418A1
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WO
WIPO (PCT)
Prior art keywords
sheet
support member
fusion
sheets
hole
Prior art date
Application number
PCT/JP2014/077926
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English (en)
Japanese (ja)
Inventor
伸二 浜本
康至 今井
Original Assignee
花王株式会社
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Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480048133.4A priority Critical patent/CN105492187B/zh
Publication of WO2015064418A1 publication Critical patent/WO2015064418A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B29C66/72941—Non woven mats, e.g. felt coated
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15739—Sealing, e.g. involving cutting
    • 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
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A61F13/4963—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs characterized by the seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83435—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts said rollers, cylinders or drums being hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to a method for manufacturing a sheet fusion body having a seal edge portion fused in a state where the edges of a plurality of sheets are overlapped, and a sheet joining apparatus used therefor.
  • a rotary processing device having a processing portion and a receiving portion that can move relative to each other in a direction approaching and separating from each other is used, and the processing portion is moved while the processing portion is rotated.
  • Heat seal processing is widely performed in which a part or the whole of the workpiece is welded to form a seal portion by supplying between the base and the receiving portion.
  • a pants-type disposable diaper has conventionally formed a pair of side seals by joining both sides of the abdomen and both sides of the dorsal side by heat sealing, and forming a pair of waist openings and a pair of Manufactured by forming leg openings.
  • Patent Document 1 describes a sealing method in which an overlapped synthetic resin film is heated and welded and cut simultaneously.
  • an energized nichrome wire is pressed against the overlapping portion of the films and the film is heated by the heat. Cut at the same time as welding.
  • Patent Document 2 as a method for fusing a synthetic fiber cloth mainly composed of a thermoplastic synthetic resin, the tip of a cutting blade is pressed against the synthetic fiber cloth, and an electric current is passed through the cutting blade so that the synthetic fiber cloth is The synthetic fiber cloth is melted by heating up rapidly to the thermoplastic temperature, and at the same time, a melt-solidified layer is formed in the melted part of the synthetic fiber cloth produced by the melting, and the fiber in the melted part A method for preventing the unraveling of is described.
  • Patent Document 3 as a heat shrinkable film welding method, the film is linearly welded between an ultrasonic welding horn and a welding roller, and at the same time, the film is cut outside the welded portion. How to do is described.
  • the present invention is a method for producing a sheet fusion body having a seal edge portion fused with the edges of a plurality of sheets being overlapped. At least a part of the plurality of sheets includes a resin material.
  • a strip-shaped sheet laminate in which a plurality of sheets are stacked includes a stretchable sheet.
  • One side of the belt-like sheet laminate in a state where a predetermined tension is applied is brought into contact with a support member having a through-hole so as to overlap the through-hole, and the belt-like sheet laminate in a pressurized state
  • the cutting sheet inserted through the through hole is pressed against the body to sever the strip-shaped sheet laminate, and at the same time, the cutting edges of the plurality of sheets in the pressurized state generated by the severing And the step of forming the seal edge portion.
  • this invention is a manufacturing method of an absorbent article including the process of manufacturing the said sheet
  • the present invention is a sheet joining apparatus used in the manufacturing method, comprising an annular support member having a through-hole, and a belt-like sheet laminated body in which a plurality of sheets are stacked.
  • a hollow rotating roll that rotates in a state along the circumferential surface, a pressurizing mechanism that includes a pressing member that presses the sheet laminate against the circumferential surface of the rotating roll, and a hollow portion of the rotating roll.
  • a fusing mechanism that includes a fusing tool that can move inside and outside the through hole of the support member that forms the peripheral surface portion of the rotating roll.
  • FIG. 1 is a schematic perspective view of an example of a method for producing a pants-type disposable diaper using a sheet bonding apparatus, which is an embodiment of the method for producing an absorbent article of the present invention.
  • FIG. 2 is a perspective view schematically showing a pants-type disposable diaper manufactured by carrying out the manufacturing method shown in FIG.
  • FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II of FIG.
  • FIG. 4 is a perspective view schematically showing a manufacturing process of the diaper continuous body (strip-shaped sheet laminate) shown in FIG. 1.
  • FIG. 5 is a diagram schematically showing a state in which a diaper continuous body (band-shaped sheet laminate) is introduced into the sheet bonding apparatus shown in FIG. 1, and FIG. FIG.
  • FIG. 5B is a cross-sectional view taken along line II-II in FIG. 6 (a) to 6 (c) respectively show the side seal portion (seal edge) at the same time that the diaper continuous body (band-shaped sheet laminate) is divided by using the sheet bonding apparatus shown in FIG. It is explanatory drawing explaining a mode that it forms.
  • 7 (a) and 7 (b) are respectively a side seal part (seal edge part) on one side and the vicinity thereof in FIG. 3 in a state where the waist opening of the diaper shown in FIG. 3 is expanded. .
  • the sheet fusion body fused to each other in a state where a plurality of sheets are stacked the plurality of sheets that are fused to each other at the fused portion in normal use are not peeled apart, A practically sufficient fusion strength is required.
  • the sheet fusion body obtained by using the technique of performing the fusing and welding described in Patent Documents 1 to 3 has a fused portion (in a state where the edges of a plurality of sheets are overlapped). Since the fusion strength between the sheets at the fused seal edge) is insufficient, the fusion part may be broken in normal use, and a plurality of sheets may be separated.
  • the sheet fusion product when used for manufacturing a product (sanitary product) that is applied to the skin of an absorbent article or the like, the fusion part is required to have flexibility and good touch.
  • Documents 1 to 3 do not describe the existence of such desired characteristics and specific means for responding to them.
  • the present invention relates to a method for producing a sheet fusion body having a seal edge portion that is fused in a state where edges of a plurality of sheets are overlapped, and the seal edge portion has a practically sufficient fusion strength.
  • FIG. 1 shows an outline of a method for producing a pants-type disposable diaper using a sheet bonding apparatus, which is an embodiment of the method for producing an absorbent article of the present invention.
  • the manufacturing method of the absorbent article of the present invention includes a step of manufacturing a “sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets are overlapped”.
  • a pants-type disposable diaper having an exterior body 3 having a pair of side seal portions 4, 4. 1 is produced. Both the outer package 3 and the diaper 1 including the same are the sheet fusion product.
  • the diaper 1 includes an absorbent main body 2 and an exterior body 3 that is disposed on the non-skin contact surface side of the absorbent main body 2 and fixes the absorbent main body 2. And both side edge portions of the exterior body 3 in the ventral side portion 1A and both side edge portions of the exterior body in the back side portion 1B are joined together to form a pair of side seal portions 4, 4, a waist opening portion 8 and a pair of This is a pants-type disposable diaper in which leg openings 9 and 9 are formed, and this side seal portion 4 corresponds to the above-mentioned “sealing edge portion fused in a state where the edge portions of a plurality of sheets are overlapped”. Part.
  • a diaper continuum 10 absorbent article continuum in which a precursor) is continuous in one direction is separately manufactured, and the diaper continuum 10 is individually cut by a fusing tool 27 as shown in FIG.
  • an outer package 3 sheet fusion
  • the pants-type disposable diaper 1 sheet fusion body comprising the body is continuously manufactured.
  • the resin material preferably includes a heat-sealable synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene, and is preferably made of a nonwoven fabric, a film, a laminate sheet of a nonwoven fabric and a film, or the like.
  • the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric.
  • the sheet laminate it is preferable that all of a plurality of sheets constituting the sheet laminate include a resin material.
  • the waist elastic member 5 forming the waist gathers, the waist elastic member 6 forming the waist gathers, and the leg elastic member 7 forming the leg gathers are stretched to a predetermined stretch rate. Distribute multiple pieces each.
  • the hot melt adhesive is continuously or intermittently applied to the waist elastic member 5 and the waistline elastic member 6 by an adhesive application machine (not shown),
  • the leg elastic member 7 is disposed while forming a predetermined leg-circumferential pattern via a known swing guide (not shown) that reciprocates perpendicular to the sheet flow direction.
  • an adhesive coating machine (not shown) is attached to a predetermined part of one or both surfaces of both sheets. ) To apply hot melt adhesive.
  • the elastic members such as the waist elastic member 5 and the waistline elastic member 6 are divided by the fusing tool 30 in the both sheets 31 and 32 (the portion where the side seal portion 4 is to be formed) (reference numeral 10C in FIG. 5).
  • the fusing tool 30 in the both sheets 31 and 32 (the portion where the side seal portion 4 is to be formed) (reference numeral 10C in FIG. 5).
  • the band-shaped exterior body 3 in which a plurality of elastic members 5, 6, 7 are arranged in an expanded state between the band-shaped sheets 31, 32 is formed.
  • a plurality of waistline elastic members 6 and a plurality of leg portions are formed using an elastic member precutting means (not shown) so as to correspond to positions where the absorbent main body 2 described later is disposed.
  • the elastic member 7 is pressed and divided into a plurality of pieces so that the contraction function is not expressed.
  • the elastic member precut means include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605.
  • an adhesive such as a hot melt adhesive is applied in advance to the absorbent main body 2 manufactured in a separate process (not shown), and the absorbent main body 2 is rotated 90 degrees. Then, it is intermittently supplied and fixed on the inner layer sheet 32 constituting the strip-shaped outer package 3.
  • the adhesive for fixing the absorbent main body may be preliminarily applied not to the absorbent main body 2 but to the position where the absorbent main body 2 is arranged in the inner layer sheet 32.
  • a leg hole LO ′ is formed inside the annular portion that is annularly surrounded by the leg elastic member 7 in the strip-shaped exterior body 3 in which the absorbent main body 2 is disposed.
  • This leg hole forming step can be carried out by using a technique similar to that in a conventional method for manufacturing this type of article, such as a rotary cutter and a laser cutter.
  • the leg hole is formed after the absorbent main body 2 is arranged on the belt-shaped outer package 3, but the leg hole may be formed before the absorbent main body 2 is arranged.
  • the strip-shaped exterior body 3 is folded in the width direction (a direction perpendicular to the conveying direction of the exterior body 3). More specifically, as shown in FIG. 4, both side portions 3 a, 3 a along the conveying direction of the strip-shaped outer package 3 are folded back so as to cover both longitudinal ends of the absorbent main body 2. After fixing both ends in the longitudinal direction, the outer package 3 is folded in the width direction together with the absorbent main body 2. In this way, the target diaper continuous body 10 (band-shaped sheet laminated body) is obtained.
  • the sheet bonding apparatus 20 (edges of a plurality of sheets) is used for the diaper continuous body 10 (band-shaped sheet laminate) separately manufactured as described above.
  • Sheet outer body 3 (sheet fusion body) having a pair of side seal portions 4 and 4 (seal edge portion) using a sheet fusion body manufacturing apparatus having a seal edge portion fused in a state of overlapping.
  • the pants-type disposable diaper 1 (sheet fusion
  • the sheet bonding apparatus 20 includes a cylindrical (annular) support member 21 having a through-hole 21H, and a diaper continuous body 10 (band-shaped sheet stack).
  • a hollow rotating roll 23 that rotates in the direction of arrow A in a state in which the body is aligned with the peripheral surface of the support member 21, and a pressure belt 24 as a pressing member that presses the diaper continuous body 10 against the outer peripheral surface of the rotating roll 23.
  • a pressurizing mechanism 26 configured to include a fusing tool 27 that is arranged in a hollow portion of the rotary roll 23 and is movable inside and outside the through-hole 21H of the support member 21 that forms the peripheral surface portion of the rotary roll 23.
  • the sheet bonding apparatus 20 includes a tension adjustment mechanism (not shown) that can increase or decrease the tension of the pressure belt 24 wound around the outer peripheral surface of the cylindrical support member 21 (the peripheral surface portion of the rotary roll 23). By adjusting the tension, the pressure applied to the diaper continuous body 10 (sheet laminate) can be appropriately adjusted by the support member 21 and the pressure belt 24 (pressing member).
  • the support member 21 forms a peripheral surface portion (contact portion with a workpiece) of the rotary roll 23 and is sandwiched between a pair of annular frame bodies 22 and 22 that form both left and right edge portions of the rotary roll 23. It is fixed.
  • the support member 21 is composed of a single annular member having the same length as the circumferential length of the annular frame 22, such as a metal material such as iron, aluminum, stainless steel, or copper, or ceramics. It consists of material which has the heat resistance of.
  • the support member 21 has a slit-shaped through-hole 21H that penetrates the support member 21 in the thickness direction, as shown in FIGS.
  • FIG. 5 FIG. 5B
  • the support member 21, the pressure belt 24 (pressing member), and the diaper continuous body 10 (sheet laminated body) sandwiched between them are shown in FIG. Although it is described as moving horizontally from the middle left side to the right side, in actuality, these members are rotated and moved in a curved state corresponding to the annular shape (cylindrical shape) of the rotary roll 23.
  • the through-hole 21 ⁇ / b> H has a rectangular shape in plan view, and the longitudinal direction of the through-hole 21 ⁇ / b> H coincides with the width direction CD (Cross machine Direction) of the device 20, and a predetermined interval is provided in the circumferential direction of the cylindrical support member 21. A plurality are formed.
  • the width direction CD is a direction orthogonal to the machine direction (conveying direction of the diaper continuous body 10 and the diaper 1) MD (Machine-Direction) along the manufacturing process of the diaper in the apparatus 20.
  • the through hole 21H in the support member 21 1) In addition to a method of drilling the through hole 21H in a predetermined portion of the support member 21 by etching, punching, laser processing, or the like, 2) A method of using a plurality of curved rectangular members in place of one annular member, and arranging the plurality of members between the pair of frame bodies 22 and 22 with a predetermined interval in the circumferential direction of the frame body 22 Is mentioned. In the method 2), the interval between two adjacent members is a slit-shaped through hole 21H.
  • the support member 21 has a recess 21D on its outer surface (contact surface with the workpiece).
  • a plurality of recesses 21D are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21, and a slit-shaped through-hole 21H is formed in a region (convex portion) located between two adjacent recesses 21D and 21D. Is formed.
  • the through hole 21H is formed at the center in the circumferential direction of the cylindrical support member 21 in the convex portion.
  • the relative thickness of the diaper continuous body 10 is relatively small.
  • the diaper continuous body 10 can be introduced onto the outer surface of the support member 21 so that a large portion (for example, an arrangement region of the absorbent main body 2) is accommodated in the recess 21D.
  • the diaper continuous body 10 is thus introduced onto the support member 21, as shown in FIG. 5B, the contact surface (the other surface) of the diaper continuous body 10 with the pressure belt 24 (pressing member).
  • 10b is substantially flat, and when the pressure belt 24 is pressed against the diaper continuous body 10, the portion of the diaper continuous body 10 located on the convex portion where the through-hole 21H is formed (reference numeral in FIG. 5).
  • the entire portion to be divided and its vicinity shown by 10C is uniformly pressed in the thickness direction at a predetermined pressure by wrapping the diaper continuous body 10 around the support member 21 with a predetermined tension and the pressure belt 24.
  • a plurality of parts constituting the cut portion are formed. Sheets It can be fused bets cutting edge each other more reliably and will, further improvement in fusion strength of the side seal portion 4 (sealing edge) is achieved.
  • the pressure mechanism 26 includes an endless pressure belt 24 (pressing member) and three rolls 25a, 25b, and 25c that rotate in a state where the pressure belt 24 is bridged.
  • the rolls 25a, 25b, and 25c may be drive rolls or driven rolls that rotate with the pressure belt 24.
  • the pressure belt 24 moves at the same speed as the rotating roll 23 (supporting member 21) by using any one or more of the rolls 25a, 25b, and 25c as a driving roll or with the rotating roll 23.
  • the support member 21 and the pressure belt 24 are preferably maintained in a predetermined temperature range by air cooling, water cooling, or the like.
  • a heat-resistant metal or resin belt capable of withstanding the heat generated during processing can be used, and the pressure belt 24 in this embodiment is a metal such as iron, aluminum, stainless steel or the like. Made of material.
  • a fusing mechanism 29 is provided in the hollow portion of the hollow rotating roll 23 (support member 21).
  • the fusing mechanism 29 includes a fusing tool 27 that contacts and cuts the workpiece (diaper continuum 10), and a main body 28 that operably supports the fusing tool 27.
  • the main body 28 is a cylindrical (annular) rotating body, and is rotatable in the direction of arrow A around a rotating shaft (not shown) arranged at the center of rotation.
  • the rotating shaft rotates. It is freely supported by a bearing (not shown) and driven by a rotary drive device (not shown) such as a motor.
  • the rotation center of the main body 28 coincides with the rotation center of the rotary roll 23 (annular support member 21).
  • the rotary roll 23 is configured to rotate together with the main body 28 by the rotary drive device.
  • a plurality (six in this embodiment) of the fusing tools 27 are intermittently arranged in the circumferential direction on the outer peripheral surface of the cylindrical main body 28 facing the support member 21 of the rotary roll 23.
  • a plurality of insertion ports are formed in the outer peripheral surface of the main body 28 corresponding to the plurality of fusing tools 27, and each fusing tool 27 is inserted from the inside of the main body 28 through the insertion ports. It extends toward the outside of the main body 28.
  • the fusing tool 27 has a base end (an end opposite to the tip that contacts the workpiece) connected to an insertion tool driving means (not shown) inside the main body 28.
  • the tool driving means is movable between the cylindrical main body 28 and the rotary roll 23 located outside thereof in the radial direction of the main body 28 (normal direction of the rotary roll 23).
  • the fusing tool 27 is disposed opposite to the support member 21 and can be moved in the radial direction of the main body 28 inside and outside the through hole 21H by the insertion tool driving means.
  • the fusing tool 27 is a metal cutting blade, and the workpiece can be cut at its tip (blade edge).
  • at least the cutting edge of the fusing tool 27 can be heated to a temperature at which the diaper continuous body 10 (nonwoven fabric) that is a workpiece can be melted by heating means (not shown). Is a heating blade capable of fusing at least when pressed against the diaper continuous body 10.
  • the tip portion thereof When the fusing tool 27 is not in use, the tip portion thereof is located at a position spaced a predetermined distance from the support member 21 (through hole 21H) forming the peripheral surface portion of the rotary roll 23 to the inside of the sheet bonding apparatus 20.
  • the insertion tool driving means Located in a predetermined standby position, when in use, the insertion tool driving means moves from the standby position toward the support member 21 (through hole 21H), and enters the through hole 21H at a position opposite to the support member 21. At least the distal end portion of the fusing tool 27 can protrude outward from the outer peripheral surface of the support member 21 through the through hole 21H.
  • the workpiece is moved in the reverse direction by the insertion tool driving means and returned to a predetermined standby position.
  • the fusing tool 27 is a region in which a workpiece is stacked on the through hole 21 ⁇ / b> H facing the fusing tool 27 (a region covered with the pressure belt 24 in the support member 21 in FIG. 1). ) (On the upstream side in the machine direction MD of the region) is inserted into the through-hole 21H, and other portions are in a predetermined standby position.
  • the cutting edge of the molten sheet generated by the cutting of the workpiece by the fusing tool 27 is cooled and solidified. Therefore, on the downstream side, the fusing tool 27 is not inserted into the through-hole 21H and is in a predetermined standby position.
  • the fusing tool 27 is not limited to the heating blade as described above as long as it can melt the diaper continuous body 10 that is a workpiece.
  • a resistance heating element such as a nichrome wire, an ultrasonic blade ( A cutter blade of an ultrasonic cutter may be used.
  • the diaper continuum 10 (band-shaped sheet laminate) is a peripheral roll of a rotary roll 23 that is driven to rotate in the direction of arrow A in a state where a predetermined tension is applied by a guide roll (not shown).
  • a guide roll (not shown)
  • a lead roll, a nip roll, etc. (not shown) To move away from the support member 21.
  • the diaper continuous body 10 is wound around the support member 21 forming the peripheral surface portion of the rotary roll 23 with a predetermined tension and conveyed so as to be in pressure contact with the pressure belt 24, so that the diaper continuous body 10 is Since the portion sandwiched between the support member 21 and the pressure belt 24 (pressing member) and the vicinity thereof are pressed (compressed) in the thickness direction from before the cutting by the fusing tool 27 (heating blade),
  • the diaper continuous body 10 includes “a sheet whose thickness changes when pressed in the thickness direction” or “a sheet having elasticity”, the diaper continuous body 10 can be more efficiently compressed.
  • the diaper continuous body 10 (a strip-shaped sheet laminate in which a plurality of sheets are stacked), from the viewpoint of improvement in flexibility and touch, at least a plurality of sheets constituting the diaper continuous body 10
  • a “sheet whose thickness changes when pressed in the thickness direction” or a “stretchable sheet” may be used, such as during and before and after cutting by the fusing tool 27. If the sheet is not in a pressurized state, the tension applied to the diaper continuous body 10 is released immediately after the diaper continuous body 10 is divided by the fusing tool 27, whereby the sheet thickness is recovered or contracted.
  • the sheet for example, a sheet in which an elastic member such as thread rubber is arranged in an expanded state with an adhesive on one surface of the sheet which does not have elasticity, or a known elastic nonwoven fabric itself is used.
  • an elastic member such as thread rubber
  • a known elastic nonwoven fabric itself is used. Examples include a sheet that expands and contracts.
  • the portion of the diaper continuous body 10 (sheet laminated body) that overlaps the through-hole 21H (partition planned portion 10C) is merely contacted by the pressure belt 24 (pressing member) from the one surface side.
  • the through hole 21H exists, there is no member in contact with the other side, and the support member 21 and the pressure belt 24 are not sandwiched. Strictly speaking, therefore, the pressure (compression) force generated by being sandwiched between the two members 21 and 24 is not generated in the parting planned portion 10C of the diaper continuous body 10.
  • the parting portion 10C that overlaps the through hole 21H itself is not sandwiched between the members 21 and 24, but overlaps the vicinity thereof, that is, the vicinity of the through hole 21H (opening edge) in the diaper continuous body 10. Is sandwiched between the members 21 and 24, and therefore does not move before and after the irradiation of the pressing by the fusing part 27, and therefore, the cutting edge produced by the division of the diaper continuous body 10 by the fusing tool 27 does not move. That is, the parting planned part 10C of the diaper continuous body 10 (the part overlapping the through-hole 21H in the sheet laminate) is a part constrained by the pressing force between the members 21 and 24, and the pressing force is practically the same. It is an affected part.
  • the rotation angle of the support member 21 (rotary roll 23) from when the diaper continuous body 10 is introduced onto the support member 21 to when the diaper continuous body 10 leaves the support member 21 can be, for example, 90 to 270 degrees, and more preferably 120 degrees. ⁇ 270 degrees.
  • the range of the angle (pressure contact angle) at which the diaper continuous body 10 is pressed against the support member 21 by the pressure belt 24 (pressing member) covers the entire circumference of the cylindrical support member 21 (rotary roll 23).
  • the pressure contact is 360 degrees, it is preferably 90 to 270 degrees, and more preferably 120 to 270 degrees.
  • one surface 10 a is arranged around the rotating roll 23.
  • the diaper continuum 10 in a pressurized state is formed in contact with the support member 21 so as to overlap the through hole 21H, which has a slit-like through hole 21H in which a surface portion is formed and the fusing tool 27 can be inserted.
  • the diaper continuous body 10 is divided, and at the same time, the cutting edges of the plurality of sheets in the pressurized state generated by the division are fused together,
  • the side seal part 4 (seal edge part) is formed.
  • the other surface 10 b of the diaper continuous body 10 that is in contact with the support member 21 (the side opposite to the one surface 10 a that is a contact surface with the support member 21).
  • the pressing belt 24 pressing member
  • the tip of the fusing tool 27 is pressed against the diaper continuous body 10 in that state from the support member 21 side through the slit-shaped through-hole 21H.
  • the diaper 1 sheet fusion body which comprises the exterior body 3 (sheet fusion body) which has a pair of side seal parts 4 and 4 (seal edge part) is manufactured continuously.
  • the pressing of the fusing tool 27 is performed on the diaper continuous body 10 in a pressurized state (compressed state) by being sandwiched between the support member 21 and the pressure belt 24, so that the diaper continuous body 10 is pressed. It is preferable from the viewpoint of improving the fusion strength of the side seal portion 4 by reliably fusing the cut edge portions of the plurality of sheets generated by the division.
  • FIG. 6 is a view for explaining a state in which the side seal portion 4 (seal edge) is formed at the same time as the diaper continuous body 10 (band-shaped sheet laminate) is divided using the sheet bonding apparatus 20.
  • a portion 10C to be cut by the fusing tool 27 of the diaper continuous body 10 and the vicinity thereof are schematically shown.
  • the diaper continuous part 10C of the diaper continuous body 10 in the present embodiment has a machine direction MD (rotation of the rotary roll 23) in the region where the absorbent main body 2 of the diaper continuous body 10 is not disposed. Center of direction A).
  • 10 C of such parting plan parts are the opening edge part of the waist opening part 8 (refer FIG.
  • the 8 layer structure part on which 8 sheets were piled up, and other parts are 4 sheets. It is a four-layer structure part that is superimposed. As shown in FIG. 6A, the four-layer structure portion includes two sheets (an outer layer sheet 31 and an inner layer sheet 32) constituting one exterior body 3 in the ventral side part 1A, and a back side part 1B. It consists of the same two sheets 31 and 32 that constitute one exterior body 3, and these four sheets are laminated.
  • the eight-layer structure portion is folded so that both side portions 3a and 3a of the strip-shaped outer package 3 cover both longitudinal ends of the absorbent main body 2 when the diaper continuous body 10 is manufactured ( 4)), there are two exterior bodies 3 on each of the abdominal part 1A and the back part 1B, and a total of four exterior bodies 3 and 3 are laminated.
  • 8 The sheets 31 and 32 are laminated.
  • elastic members such as the waist elastic member 5 and the waistline elastic member 6 may be interposed between the overlapping sheets 31 and 32.
  • the elastic member is not shown for easy explanation.
  • the 4-layer structure portion will be mainly described, but unless otherwise specified, the 8-layer structure portion is configured in the same manner as the 4-layer structure portion, and the side seal portion 4 is formed.
  • the diaper continuous body 10 is arranged in the direction of arrow A so that one surface 10a is in contact with the support member 21 and the portion 10C to be divided is positioned on the slit-shaped through hole 21H. While being introduced onto the rotating support member 21 and being pressed against the other surface 10b by the pressure belt 24 (pressing member), it is pressurized (compressed) in the thickness direction while being conveyed in the direction of arrow A. And the front-end
  • the forming materials (fibers, etc.) of the sheets 31 and 32 existing in the planned cutting portion 10C are the leading end portion of the cutting tool 27.
  • the forming material that is melted and cut by the pressing or the heat from the fusing tool 27 and is present in the vicinity of the portion to be cut 10C is indirectly heated by the fusing tool 27 and melted.
  • the parting plan part 10C of a four-layer structure is melted, and in a form in which a single sheet stack (diaper precursor) is cut from the diaper continuous body 10,
  • the cut edges of the four sheets 31 and 32 are fused together.
  • These cutting edges are respectively in a pressurized state (compressed state) by being sandwiched between the support member 21 and the pressure belt 24 from before the formation (before the diaper continuous body 10 is divided by the fusing tool 27). It has been done.
  • the manufacturing method of the diaper of the present embodiment as described above, in the pressing operation of the fusing tool 27 once, the strip-shaped sheet laminated body is divided and the two pressed states generated by the division are present. Since the fusion
  • the cutting edges of the sheets 31 and 32 are heated and melted while in contact with the fusing tool 27 (heating blade) and immediately after the contact with the fusing tool 27, but thereafter, the cutting edge of the sheets 31 and 32 is in contact with the support member 21. It is easily cooled by contact, and is quickly cooled and solidified by heat transfer to the outside air, the support member 21 and the pressure belt 24, and the fused portion 40 in which the forming material (fibers, etc.) of the cut edge is melted and integrated. It becomes. Thus, by forming the fused part 40, one of the pair of side seal parts 4, 4 in one diaper 1 is formed. If necessary, the cutting edge portions of the sheets 31 and 32 may be forcibly cooled by using known cooling means such as a suction device and an exhaust device to promote the formation of the fused portion 40.
  • known cooling means such as a suction device and an exhaust device to promote the formation of the fused portion 40.
  • a pants-type disposable diaper 1 (sheet fused body) comprising an exterior body 3 (sheet fused body) having a pair of side seal portions 4 and 4 (seal edge portions) is continuously manufactured.
  • a side seal part 4 can be cited.
  • the cross-sectional view in the direction (width direction of the diaper 1) perpendicular to the direction in which the side seal portion 4 extends is caused by the division.
  • the outer edge 4a of the side seal part 4 forms an arc shape convex toward the inner side (the direction from the side far from the skin of the wearer to the side closer to the wearer) of the exterior body 3 (sheet fusion body), and includes the outer edge 4a.
  • a fusion part 40 between the four sheets 31 and 32 constituting the exterior body 3 is formed inward of the exterior body 3, and the fusion part 40 is formed in the thickness direction of the exterior body 3.
  • the central portion (the vertical direction in FIG. 6C or FIG. 7) is wider than both end portions (upper end portion and lower end portion). That is, in the cross-sectional view in the width direction of the diaper 1 (direction perpendicular to the cutting direction by the fusing tool 27), the fusion bonded portion 40 is inward / outward direction (left-right direction in FIG. ) In the direction (vertical direction in FIG.
  • the side seal portion 4 is harder and softer than other parts of the diaper 1 due to the presence of the fused portion 40 formed by melting and solidifying the sheet forming material, and causes the feeling of wearing the diaper 1 to be reduced.
  • the fusion part 40 is formed in a crescent shape or a half moon shape in the cross-sectional view in the width direction of the diaper 1, the same cross-sectional view as the fusion part in the conventional side seal part is obtained.
  • the ratio of the fused portion 40 existing in the corner portion 3S of the side edge portion of the exterior body 3 constituting the side seal portion 4 is reduced.
  • the central portion in the thickness direction of the side edge of the exterior body 3 (the corner 3S on the one surface side of the exterior body 3 and the 3S on the other surface side, which is a part that greatly affects the fusion strength of the side seal portion 4) Since a sufficient amount of the fused portion 40 exists in the portion sandwiched between the side seal portion 4 and the side seal portion 4, the side seal portion 4 has a practically sufficient fusion strength. Inconveniences such as tearing are unlikely to occur.
  • the side seal part 4 (fusion
  • FIG. 7 shows the side seal portion 4 (fused portion 40) in a state where the waist opening 8 is expanded when the diaper 1 is worn. In the state where the waist opening 8 is expanded, the side seal portion 4 is normally in a state where the fused portion 40 is exposed as shown in FIG. 7A, but the outer edge 4a of the side seal portion 4 is the exterior. It is difficult to visually recognize from the outside due to the convex arc shape toward the inside of the body 3 and the fact that the fused portion 40 is smaller than the conventional side seal portion (fused portion).
  • the outer edge 4a of the side seal portion 4 has a convex arc shape toward the inner side of the exterior body 3, depending on the forming material of the sheets 31, 32, as shown in FIG.
  • the corner 3S of the side edge of the exterior body 3 on the abdominal side 1A side and the corner of the side edge of the exterior body 3 on the back side 1B side The portion 3S may approach and the separation distance between the corner portions 3S and 3S may be reduced. Therefore, the fusion part 40 located between the two corners 3S and 3S is difficult to touch by the hand and is located on the outer side of the diaper 1 closer to the diaper 1 than the fusion part 40. Therefore, not only the feeling of wearing the diaper 1 but also the appearance is improved.
  • the side seal part 4 (fusion part 40) becomes difficult to visually recognize from the outside in the wearing state or the natural state (contracted state) of the diaper 1, for example, after the use of the diaper 1, the protection from the infant who is the wearer When a person (for example, a mother) removes the diaper, it is difficult to find the side seal portion 4, and there is a possibility that it takes time to remove the diaper 1.
  • the color of the constituent member of the diaper 1 that crosses the side seal portion 4 is set to the ventral side of the side seal portion 4. The method of making it differ by (front side) and back side (rear side) is mentioned.
  • the color of the waist elastic member 5 or the exterior body 3 (the outer layer sheet 31 and the inner layer sheet 32) between the abdominal side 1A (front view) and the back side 1B (back view) of the diaper 1.
  • the method of making different is mentioned.
  • the side seal portion 4 is positioned at the color switching portion, so the visibility of the side seal portion 4 is increased and the occurrence of the inconvenience is effectively prevented.
  • the reason why the fused portion 40 of the side seal portion 4 is formed in a crescent shape or a half moon shape in a cross-sectional view in the width direction of the diaper 1 is as shown in FIGS. 6B and 6C.
  • the diaper continuous body 10 (scheduled scheduled portion 10C) made of a nonwoven fabric is pressed between the support member 21 and the pressing member made of a metal material during and immediately after the pressing of the fusing tool 27 to the planned split portion 10C of the diaper continuous body 10. This is presumed to be because of being interposed between 24 and 24.
  • the metal material that is the main forming material of the support member 21 and the pressing member 24 that sandwich the diaper continuous body 10 (the outer layer sheet 31 and the inner layer sheet 32) from above and below is the nonwoven fabric that is the main forming material of the sheets 31 and 32. Therefore, the heat generated in the sheets 31 and 32 by the pressing of the fusing tool 27 is cooled by the outside air, and at the same time, the support member 21 or the pressing member 24 in contact with the sheets 31 and 32.
  • the corner 3S of the side edge portion of the exterior body 3 constituting the side seal portion 4 formed by dividing the diaper continuous body 10 by the pressing of the fusing tool 27 is easily absorbed at the corner 3S.
  • the heat generated in the corner portion 3 is quickly absorbed by both the members 21 and 24, as a result.
  • the corner portion 3 is hardly become a hot extent that the fused portion 40 is formed, therefore, the proportion of fused portion 40 is very small site.
  • the central portion in the thickness direction of the side edge portion of the outer package 3 (the central portion of the portion sandwiched between the corner 3S on the one surface side of the outer package 3 and the 3S on the other surface side) has high thermal conductivity. Since the members 21 and 24 are not in contact with each other, the heat generated in the central portion by the pressing of the fusing tool 27 stays in the central portion and melts the central portion. As a result, the fusion portion 40 is formed in the central portion. Many become unevenly distributed.
  • the support member 21 and the pressing member are provided as in the present embodiment.
  • the member 24 is made of a metal material such as iron, aluminum, stainless steel, or copper, or ceramics, and at least a part of the plurality of sheets 31 and 32 that constitute the diaper continuous body 10 (band-shaped sheet laminate) (
  • the outer layer sheet 31) forming the outer surface of the outer package 3 includes a resin material in a part thereof, and specifically, for example, is preferably made of a nonwoven fabric.
  • the resin material is contained in all the sheets of the plurality of sheets 31.
  • a nonwoven fabric what is normally used in the said technical field can be especially used without a restriction
  • the fusion part 40 is surely formed in a crescent shape or a half moon shape in a cross-sectional view in the width direction of the diaper 1 (sheet fusion body), and practically sufficient fusion to the side seal part 4 (seal edge part).
  • the width W of the slit-shaped through-hole 21H into which the fusing tool 27 is inserted (see FIG. 6B).
  • the length of the through-hole 21H along the circumferential direction of the rotary roll 23.) is preferably 0.1 mm or more, more preferably 0.3 mm or more, and preferably 10 mm or less, more preferably 5 mm or less, more specifically. Specifically, it is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 5 mm or less.
  • the sheet fusion product produced in the present invention can be used as various articles as it is or integrated with other members.
  • various articles include absorbent articles other than the above-described pants-type disposable diapers, for example, sanitary napkins, incontinence pads, and the like, and besides absorbent articles, floor cleaning sheets, Examples include a body wiping sheet and a heating tool for warming the body.
  • a sheet fusion body which constitutes an absorptive article a) a top sheet which forms a skin contact surface of an absorptive article, and a back sheet which forms a non-skin contact surface from the peripheral part of an absorber B)
  • the top sheet and the wing part forming sheet, the wing part forming sheet and the back sheet, the top sheet, the wing part forming sheet, and the back sheet in the sanitary napkin are melted. The thing which I wore etc. is mentioned.
  • the sheet fusion product produced in the present invention is excellent in the flexibility and touch of the seal edge, when the absorbent article is a sanitary napkin, the step of producing the sheet fusion product, You may use for the outer periphery seal
  • the process of manufacturing the sheet fusion body is performed by forming an outer peripheral seal part that joins the top sheet and the back sheet with the absorbent body interposed along the outer periphery of the main body part (part excluding the wing) of the sanitary napkin. It may be used.
  • the sheet laminated body may be one in which two sheets, three sheets, or five or more sheets are stacked in addition to those in which four sheets are stacked as shown in FIG.
  • a mechanism for controlling the tension of the diaper continuous body 10 on the sheet joining apparatus 20 in order to wind the diaper continuous body 10 (sheet laminated body) around the rotary roll 23 (support member 21) without generating wrinkles or sagging. May be provided.
  • the sheet bonding apparatus 20 may include a mechanism for removing resin or the like attached to the contact surface of the pressing member 24 with the diaper continuous body 10.
  • the pressurizing means (pressurizing method) for bringing the diaper continuous body 10 into a pressurized state is limited to the above-described sandwiching of the diaper continuous body 10 by the support member 21 and the pressure belt 24 (pressing member).
  • suction of the diaper continuous body 10 from the support member 21 side, air blowing to the diaper continuous body 10 from the opposite side (pressing member side) to the support member 21, and the diaper continuous body 10 to the support member 21 are supported. Examples include tension adjustment, pressurization using static electricity or magnetic force, and the like. All the parts of only one embodiment described above can be used as appropriate. Regarding the above-described embodiment of the present invention, the following additional notes are disclosed.
  • a method for producing a sheet fusion body comprising a step of forming the seal edge by attaching.
  • a pressing member is pressed against the other surface of the strip-shaped sheet laminate that is in contact with the support member, and the fusing tool inserted from the through hole is pressed against the strip-shaped sheet stack in that state.
  • the resin material contained in the sheet is any one of the above ⁇ 1> to ⁇ 3>, which is one or more heat-fusible synthetic resins selected from the group consisting of polyethylene, polyethylene terephthalate, and polypropylene.
  • Manufacturing method of sheet fusion body ⁇ 5> The method for producing a sheet fusion body according to any one of ⁇ 1> to ⁇ 4>, wherein the sheet is a nonwoven fabric, a film, or a laminate sheet of a nonwoven fabric and a film.
  • ⁇ 6> The method for producing a sheet fusion body according to any one of ⁇ 1> to ⁇ 5>, wherein the sheet laminate includes a sheet whose thickness changes when pressed in the thickness direction.
  • ⁇ 7> The method for producing a sheet fusion body according to any one of ⁇ 1> to ⁇ 5>, wherein the sheet laminate includes a stretchable sheet.
  • a method for producing an absorbent article comprising a step of producing the sheet fusion product by the production method according to any one of ⁇ 1> to ⁇ 7>.
  • the absorbent article includes an absorbent main body and an exterior body that is disposed on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body,
  • a pants-type disposable diaper in which a pair of side seal parts is formed by joining both side edges of the exterior body at both side edges and a back side part, Folding the strip-shaped exterior body in the width direction and pressing the fusing tool inserted from the through hole against a predetermined portion of the folded exterior body, the strip-shaped exterior body is divided.
  • the outer edge of the side seal portion forms an arc shape that protrudes inward of the exterior body (the sheet fusion body), and the outer edge is The method for producing an absorbent article according to the above ⁇ 9>, wherein a fused portion of a plurality of sheets constituting the outer package is formed inside the outer package more than that.
  • the fusion part is inward / outward direction from the side closer to the wearer's skin to the far side
  • ⁇ 13> The ⁇ 10>, wherein the fusion part is formed in a crescent shape or a half-moon shape in a cross-sectional view in the width direction of the absorbent article (a direction orthogonal to the dividing direction of the strip-shaped exterior body by the fusing tool).
  • ⁇ 14> A belt-shaped outer body forming step, in which the waist elastic member, the waist elastic member, and the leg elastic member are sandwiched between the belt-like outer layer sheet and the belt-like inner layer sheet in an expanded state.
  • the waist part elastic member or the color of the exterior body is different between the abdomen side part (front view time) and the back side part (back view time) of the absorbent article.
  • the manufacturing method of the absorbent article as described in ⁇ 14>.
  • a sheet joining apparatus used in the production method according to any one of ⁇ 1> to ⁇ 15> A hollow rotating roll that is configured to include an annular support member having a through-hole, and rotates in a state in which a strip-shaped sheet laminate in which a plurality of sheets are stacked is aligned with the peripheral surface of the support member; A pressurizing mechanism configured to include a pressing member that presses the sheet laminate against the circumferential surface of the rotating roll; A sheet joining apparatus comprising: a fusing mechanism that is arranged in a hollow portion of the rotating roll and includes a fusing tool that can move inside and outside of the through hole of the support member that forms a peripheral surface portion of the rotating roll.
  • the fusing tool When the fusing tool is not in use, its tip is located at a predetermined standby position at a position spaced a predetermined distance inward of the sheet bonding apparatus from the support member forming the peripheral surface portion of the rotary roll. In use, it moves from the standby position toward the through hole of the support member and enters the inside, and at least the distal end portion of the fusing tool passes through the through hole and is removed from the outer peripheral surface of the support member.
  • the belt-like sheet laminate in a state of projecting in the direction along the outer peripheral surface of the support member can be melted, and after the melting is finished, the sheet stack is moved in the reverse direction to a predetermined standby position.
  • the sheet bonding apparatus according to ⁇ 16>, wherein the sheet bonding apparatus is configured to return.
  • the sheet joining apparatus as described in ⁇ 17>.
  • a plurality of sheets have a seal edge that is fused in a state where the edges overlap, and the seal edge has a practically sufficient fusion strength.
  • a sheet fusion body is provided.
  • fusion body which has such a characteristic is provided, and the absorbent article which is kind to a wearer's skin is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Textile Engineering (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Dans la présente invention, une surface d'un corps stratifié en forme de bande (10) dans laquelle sont stratifiées une pluralité de feuilles entre en contact avec un élément de soutien (21), ledit élément de soutien comprenant un orifice traversant (21H), de manière à être superposé sur l'orifice traversant (21H), et un outil de fusion (27) introduit à partir de l'orifice traversant (21H) est poussé contre le corps stratifié en forme de bande (10), alors que ledit corps stratifié est pressé, afin de simultanément sectionner le corps stratifié en forme de bande (10) et fusionner les bords de coupe, créés par le sectionnement, de la pluralité de feuilles pressées ensemble afin de former des bords d'étanchéité (4) (éléments d'étanchéité latéraux) dans lesquels les bords de la pluralité de feuilles sont fusionnés dans ledit état en chevauchement.
PCT/JP2014/077926 2013-11-01 2014-10-21 Procédé de production de corps en feuilles fusionnées et dispositif d'assemblage de feuilles WO2015064418A1 (fr)

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CN201480048133.4A CN105492187B (zh) 2013-11-01 2014-10-21 片熔接体的制造方法和片接合装置

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JP2013-228016 2013-11-01
JP2013228016A JP5731617B2 (ja) 2013-11-01 2013-11-01 シート融着体の製造方法及びシート接合装置

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JP (1) JP5731617B2 (fr)
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CN106863825A (zh) * 2017-02-27 2017-06-20 唐山天骄科技有限公司 一种门窗密封胶条热熔焊接成型装置及成型方法
US20230038455A1 (en) * 2019-12-04 2023-02-09 3M Innovative Properties Company Rotary Acoustic Horn
IT202100032321A1 (it) * 2021-12-22 2023-06-22 Gd Spa Apparato e metodo per lavorazioni su un articolo nastriforme senza contatto, preferibilmente per la produzione di celle elettrochimiche
IT202100032318A1 (it) * 2021-12-22 2023-06-22 Gd Spa Apparato e metodo per lavorazioni su un articolo nastriforme senza contatto, preferibilmente per la produzione di celle elettrochimiche

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WO2017160701A1 (fr) 2016-03-15 2017-09-21 The Procter & Gamble Company Procédés et appareils pour séparer et positionner des articles individuels
CN109367025B (zh) * 2018-12-06 2020-08-18 比优特（苏州）塑胶科技有限公司 一种无纺布粉盖复合加工设备
EP4082730A4 (fr) * 2019-12-26 2023-07-12 Panasonic Holdings Corporation Dispositif de coupe, et dispositif de fabrication d'ensemble d'électrode stratifié
CN111387571B (zh) * 2020-03-30 2023-04-25 广州市兴世机械制造有限公司 穿着物的制造工艺
CN111248565A (zh) * 2020-03-30 2020-06-09 广州市兴世机械制造有限公司 穿着物生产系统、封合装置及输送机构

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CN106863825A (zh) * 2017-02-27 2017-06-20 唐山天骄科技有限公司 一种门窗密封胶条热熔焊接成型装置及成型方法
US20230038455A1 (en) * 2019-12-04 2023-02-09 3M Innovative Properties Company Rotary Acoustic Horn
US12070815B2 (en) * 2019-12-04 2024-08-27 3M Innovative Properties Company Rotary acoustic horn
IT202100032321A1 (it) * 2021-12-22 2023-06-22 Gd Spa Apparato e metodo per lavorazioni su un articolo nastriforme senza contatto, preferibilmente per la produzione di celle elettrochimiche
IT202100032318A1 (it) * 2021-12-22 2023-06-22 Gd Spa Apparato e metodo per lavorazioni su un articolo nastriforme senza contatto, preferibilmente per la produzione di celle elettrochimiche
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CN105492187A (zh) 2016-04-13
CN105492187B (zh) 2017-11-24
JP2015085651A (ja) 2015-05-07
JP5731617B2 (ja) 2015-06-10

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