WO2015064606A1 - Couche jetable - Google Patents

Couche jetable Download PDF

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Publication number
WO2015064606A1
WO2015064606A1 PCT/JP2014/078702 JP2014078702W WO2015064606A1 WO 2015064606 A1 WO2015064606 A1 WO 2015064606A1 JP 2014078702 W JP2014078702 W JP 2014078702W WO 2015064606 A1 WO2015064606 A1 WO 2015064606A1
Authority
WO
WIPO (PCT)
Prior art keywords
wearing article
pants
type wearing
thickness
side seal
Prior art date
Application number
PCT/JP2014/078702
Other languages
English (en)
Japanese (ja)
Inventor
知大 中澤
伸二 浜本
康至 今井
尚大 平
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480059214.4A priority Critical patent/CN105682629B/zh
Publication of WO2015064606A1 publication Critical patent/WO2015064606A1/fr

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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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1696—Laser beams making use of masks
    • 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
    • B29C65/747—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 other than mechanical means
    • B29C65/7473—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 other than mechanical means using radiation, e.g. laser, for simultaneously welding and severing
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a sinusoidal wave
    • 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
    • B29C66/70—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
    • 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
    • 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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a triangle wave or of a sawtooth wave, e.g. zigzagged
    • 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 pants-type wearing article having a side seal portion.
  • a conventional pant-type wearing article includes an absorbent main body and an exterior body that forms the outer surface of the wearing article, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together.
  • a pants-type disposable diaper in which a side seal portion is formed is known (for example, Patent Documents 1 and 2).
  • the side edge part of the ventral side part and the side edge part of the back side part of the exterior body are located inside the side edges of both side edge parts of the exterior body. Diagonally joined portions formed by joining are intermittently arranged. Therefore, the side edge of the side seal part is formed in a straight line like the side edge of the side edge part of the exterior body, the visibility is inferior, and it is easy to irritate the wearer's skin. .
  • the side seal part of the pant-type disposable diaper described in Patent Document 2 is located on the inner side of the side edges of both side edges of the exterior body, and on the side edges and back sides of the exterior body. A wavy continuous joint is formed by joining the edges. Therefore, the side seal part of the diaper described in Patent Document 2 is the same as the side seal part of the diaper described in Patent Document 1, and the side edge of the side seal part is the same as the side edge of the side edge part of the exterior body. It is formed in a straight line, has poor visibility and is easy to irritate the wearer's skin.
  • an object of the present invention is to provide a pants-type wearing article that can eliminate the above-mentioned drawbacks of the prior art.
  • the present invention includes an exterior body that forms the outer surface of a worn article, and a pair of side seal portions, a waist opening, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together
  • the present invention relates to a pants-type wearing article in which a pair of leg openings are formed.
  • Each of the pair of side seal portions is a continuous linear fusion portion in which a side edge portion of the exterior body in the front body and a side edge portion of the exterior body in the back body extend in the longitudinal direction of the side seal portion.
  • the side seal portion in the region extending from the waist opening portion to the leg opening portion has a bonded seal edge portion, and the width direction outwardly when viewed from the front of the pant-type wearing article. Convex and concave irregularities are formed in the convex direction and inward in the width direction alternately in the vertical direction.
  • FIG. 1 is a perspective view schematically showing a pants-type disposable diaper which is an embodiment of a pants-type wearing article of the present invention.
  • FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG.
  • FIG. 3 is a plan view schematically showing an unfolded and extended state of the diaper shown in FIG.
  • FIG. 4 is a cross-sectional view showing a cross section orthogonal to the direction in which the side seal portion extends, showing the side seal portion of the diaper shown in FIG. 1 and the vicinity thereof.
  • FIG. 5 is a perspective view schematically showing a manufacturing process of a diaper continuous body in the manufacture of the diaper shown in FIG. FIG.
  • FIG. 6 is a perspective view showing a laser-type joining device preferably used for manufacturing the pant-type wearing article of the present invention and a state in which a diaper continuous body is melted using the laser-type joining device.
  • FIG. 7 is a diagram schematically showing a state in which a diaper continuous body (band-shaped sheet laminate) is introduced into the laser-type bonding apparatus shown in FIG. 6, and FIG. 7 (a) shows a part of the pressing member.
  • FIG. 7B is a sectional view taken along the line II-II in FIG. 7A.
  • FIGS. 8 (a) to 8 (c) show the side seal portion (fused portion) at the same time as the continuous diaper (strip-shaped exterior body) is cut using the laser-type bonding apparatus shown in FIG.
  • FIGS. 9A to 9B are diagrams showing the behavior of the seal strength when the side seal portion is torn in the vertical direction.
  • FIG. 10 is a top view which shows typically a part of side seal part of the underpants type disposable diaper which is other embodiment of the underpants type wearing article of this invention.
  • a pants-type disposable diaper 1 which is an embodiment of a pants-type wearing article of the present invention includes an absorbent main body 2 and an exterior body 3 that forms the outer surface of the wearing article, as shown in FIGS.
  • the exterior body 3 is positioned on the non-skin contact surface side of the absorbent main body 2 and fixes the absorbent main body 2.
  • the diaper 1 has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the wearer's front-rear direction in a plan view in an unfolded and extended state as shown in FIG.
  • the diaper 1 can be divided into a crotch part 1C arranged at the crotch part at the time of wearing, and an abdominal side part 1A and a back side part 1B located in the longitudinal direction X.
  • the exterior body 3 in the crotch part 1 ⁇ / b> C is formed with recesses for forming leg openings 9, 9 at the left and right side edges along the vertical direction X.
  • the diaper 1 can be divided into a front body F and a back body R with a virtual center line CL that bisects the diaper 1 in the vertical direction X as a boundary.
  • a skin contact surface is a surface directed to a wearer's skin side at the time of wearing in a pants type wearing article or its constituent member (for example, an absorptive main part), and a non-skin contact surface is In the pants-type wearing article or its constituent members, it is a surface directed to the side opposite to the wearer's skin side (clothing side) when worn.
  • the vertical direction X corresponds to the direction (longitudinal direction) along the long side of the absorbent main body 2 which is a disposable diaper or its constituent member
  • the horizontal direction Y is the absorbent which is a disposable diaper or its constituent member. It coincides with the width direction of the main body 2.
  • the absorbent main body 2 has a vertically long shape in one direction (longitudinal direction X), and a surface sheet (not shown) that forms a skin contact surface; A back sheet (not shown) that forms a non-skin contact surface, and a liquid-retaining absorbent (not shown) interposed between the two sheets. And has a long shape in the same direction.
  • the absorbent main body 2 is joined to the central portion of the outer package 3 by a known joining means (adhesive or the like) such that the longitudinal direction X thereof coincides with the longitudinal direction X of the diaper 1 in the expanded and extended state.
  • the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape.
  • the outer package 3 is disposed on the outer layer sheet 31 that forms the outer surface of the diaper 1 (the non-skin contact surface of the outer package 3), and the inner surface side of the outer layer sheet 31.
  • An inner layer sheet 32 that forms the inner surface of 1 (skin contact surface of the exterior body 3), and a plurality of thread-like or belt-like elastic members 5, 6, and 7 fixed between the sheets 31 and 32 with an adhesive. It is configured to include.
  • the two sheets 31 and 32 are joined to each other at a predetermined site by an adhesive or heat seal (not shown).
  • the exterior body 3 includes a resin material and is formed using the resin material as a main component.
  • the outer package 3 includes a heat-fusible synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene as a resin material, and non-woven fabric, film, laminate sheet of non-woven fabric and film, and the like.
  • the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.
  • the pair of side seal portions 4, 4 in the diaper 1 includes a side edge portion A ⁇ b> 1 of the exterior body 3 in the front body F and a side edge portion B ⁇ b> 1 of the exterior body 3 in the back body R, respectively.
  • a seal edge portion is formed by joining at a continuous linear fusion portion 40 extending in the longitudinal direction X of the seal portion 4.
  • the side seal portion 4 is formed over the entire region from the waist opening 8 to the leg opening 9.
  • the fused part (seal edge part) 40 of the side seal part 4 is a state in which the side edge parts A1 and B1 of a plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the exterior body 3 are overlapped.
  • the constituent resin of the sheet is formed by melting and solidifying.
  • the side seal part 4 has no non-joining part outside the fusion part (seal edge part) 40 in the width direction Y. That is, the shape of the fused portion (seal edge) 40 is the shape of the outer edge of the side seal portion 4 outside the width direction Y as it is.
  • the side seal portion 4 in at least a part of the region extending from the waist opening 8 to the leg opening 9 is convex outward in the width direction when the pant-type wearing article (diaper 1) is viewed from the front.
  • the concave and convex portions are formed in a concave and convex shape alternately in the width direction inwardly in the width direction.
  • the side seal portion 4 in the entire region is formed in an uneven shape. Specifically, the side seal portion 4 of the diaper 1 is formed in a continuous wave shape over the entire region from the waist opening 8 to the leg opening 9 with the convex and concave adjacent to each other in the longitudinal direction X smoothly connected. ing.
  • the pants-type wearing article (diaper 1) is viewed from the front as shown in FIG. 1 and has a convex shape outward in the width direction over the entire area from the waist opening 8 to the leg opening 9. It is preferable that 1 or more and 401 or less are formed, and it is more preferable that 5 or more and 101 or less are formed.
  • the longitudinal direction of the convex shape outward in the width direction in the entire region (AT) from the waist opening 8 to the leg opening 9
  • the ratio (L ⁇ 100 / AT) of the length (L) of X is set to 0. It is preferably 1% or more and 50% or less, and more preferably 0.5% or more and 10% or less. Further, the length (L) in the vertical direction X of the convex shape may not be equal to the vertical length of the concave shape.
  • the pant-type wearing article (diaper 1) is viewed from the front as shown in FIG. 1, the height (h) of the convex shape outward in the width direction (the apex of the convex shape and the convex shape are adjacent to each other).
  • the distance from the bottom of the concave shape that is, the height of the amplitude of the convex shape and the concave shape) is 1 mm from the viewpoint of ensuring the freedom of design and obtaining an R shape that does not irritate the skin.
  • the thickness is preferably 20 mm or less and more preferably 2 mm or more and 5 mm or less.
  • the fused portion (seal edge) 40 in the side seal portion 4 is close to the skin of the wearer of the wearing article in a cross section orthogonal to the direction in which the side seal portion 4 extends (longitudinal direction X).
  • the thickness T of 40 is the same as or smaller than the total thickness (Ta + Tb) of the outer body 3 on the front body 1A side and the outer body 3 on the rear body 1B side, and the thickness T of the fusion part (seal edge) 40
  • the thickness T is larger than the thickness (Ta or Tb) of at least one of the outer body 3 on the front body 1A side and the outer body 3 on the rear body 1B side.
  • the outer edge 4 a of the seal edge portion 40 is formed with a fusion portion between sheets constituting the exterior body 3.
  • the fusion part 40 is wider at the center part in the thickness direction Q of the exterior body 3 than both end parts on the front body 1A side and the back body 1B side.
  • the outer edge 4 a of the seal edge 40 is within the P direction of the diaper 1 in a cross section orthogonal to the direction (longitudinal direction X) in which the side seal portion 4 extends.
  • a fusion arc of the sheets constituting the outer package 3 is formed on the inner side of the diaper 1 including the outer edge 4a and more on the inner side of the diaper 1 than the outer rim 4a. 3 is wider than both ends of the front body 1A side and the back body 1B side. By being formed in this way, the diaper 1 is difficult to irritate the wearer's skin.
  • the thickness Ta of the outer body 3 on the front body 1A side and the thickness Tb of the outer body 3 on the rear body 1B side are both thicknesses in portions other than the side seal portion 4, and preferably the front body 1A and the back body 1B. For each of these, the thickness is measured when the distance Lt is within a range of 1 to 11 mm from the fused portion (seal edge) 40 in the diaper lateral direction Y (see FIG. 2).
  • the thickness Ta and the thickness Tb were measured by applying a load of 0.5 cN / cm 2 with a sample cut out from each of the outer body on the front body 1A side and the outer body on the back body 1B side between flat plates. The distance between the flat plates in the state is measured, and the value is taken as the thickness.
  • the sample is cut into a 10 mm ⁇ 10 mm square, and if the dimensions cannot be cut, cut them to the closest possible dimensions.
  • the width W and the thickness T of the fused part are measured by observing a cross section under a state where no load is applied with a microscope (VHX-1000 manufactured by KEYENCE Corp.) at a magnification of 50 to 200 times.
  • the thickness Ta, the thickness Tb, and the width and thickness of the fused part are measured for three different cross sections in the direction along the side seal part 4, and the average value of the measured values is used as each value. .
  • the dimension of each part is preferably measured to a unit of 0.01 mm.
  • the thickness T of the fused portion (seal edge) 40 is firmly fused by applying a predetermined pressure, and the total thickness (Ta + Tb) of the outer body 3 on the front body 1A side and the body 3 on the rear body 1B side. Is the same as or smaller than Moreover, since the thickness T of the fused part (seal edge part) 40 is made larger than at least one of the thickness Ta and the thickness Tb, it is not melted and hardened excessively.
  • “feel good” means that the wearer feels good.
  • the thickness T of the fused part (seal edge) 40 is larger than each of the thickness Ta and the thickness Tb, the melted part (seal edge) 40 becomes soft because it does not melt excessively. Since the appearance and the touch are further improved, it is more preferable.
  • the thickness T of the fused part (seal edge) 40 is a ratio (%) to the total thickness (Ta + Tb) of the outer body on the front body 1A side and the back body 1B side in terms of the fusion strength of the side seal part. Therefore, it is preferably 100% or less, more preferably 95% or less, and from the viewpoint of appearance and touch, preferably 30% or more, more preferably 50% or more, and appearance, touch, and side seal part. From the viewpoint of the fusion strength, it is preferably 30 to 100%, more preferably 50 to 95%.
  • the thickness T of the fused part (seal edge) 40 is different from the total thickness (Ta + Tb) of the outer body of the front body 1A side and the back body 1B side (Ta + Tb-T). From the viewpoint of strength, it is preferably 0 mm or more, more preferably 0.02 mm or more, and from the viewpoint of the touch, preferably 0.25 mm or less, more preferably 0.2 mm or less. From the viewpoint of fusion strength and touch, it is preferably 0 to 0.25 mm, more preferably 0.02 to 0.2 mm.
  • the ratio (%) of the thickness T of the fused part (seal edge) 40 to the thickness Ta of the outer body on the front body 1A side and the thickness Tb of the outer body on the back body 1B side is from the viewpoint of the touch. 110% or more, more preferably 150% or more, and from the viewpoint of the fusion strength of the side seal portion, preferably 300% or less, more preferably 200% or less. From the viewpoint of fusion strength and touch, it is preferably 110 to 300%, more preferably 150 to 200%.
  • the thickness T of the fused part (seal edge) 40 is different from the thickness Ta of the exterior body on the front body 1A side and the thickness Tb of the exterior body on the back body 1B side (T-Ta, T-Tb).
  • the thickness is preferably 0 mm or less, and preferably 0.05 to 2.0 mm, and more preferably 0.1 to 1.0 mm, from the viewpoint of the fusion strength and the touch of the side seal portion.
  • the width W of the fused part (seal edge part) 40 is smaller than the thickness T of the fused part (seal edge part) 40, an advantageous effect that the touch is further improved is achieved.
  • the width W of the fused portion (seal edge) 40 is preferably 95% or less, more preferably 50% or less, and preferably 10% or more, more preferably, of the thickness T. Is 30% or more, preferably 10 to 95%, more preferably 30 to 70%.
  • the width W of the fused part (seal edge part) 40 is preferably smaller from the viewpoint of improving the flexibility and feel of the side seal part, for example, preferably 2.0 mm or less, more preferably less than 1.0 mm. More preferably, it is less than 0.3 mm. On the other hand, it is preferable that it is 0.1 mm or more from the point of ensuring the sealing strength. Further, as described above, the thickness T of the fused part (seal edge) 40 is preferably larger than the width W of the fused part (seal edge) 40, for example, the fused part (seal edge) 40. When the width W is less than 0.3 mm, the thickness T of the fused part (seal edge part) 40 is preferably 0.3 mm or more.
  • the thickness T of the fusion part (seal edge) 40, the thickness Ta of the outer body on the front body 1A side, or the thickness of the outer body on the back body 1B side is usually not achieved by the method for forming the side seal portion using a pressure heating means such as a heat roll device. That is, the side seal part (fused part) formed in accordance with a conventional method using a pressure heating means is to heat the exterior body constituting the side seal part while compressing it in the thickness direction. Therefore, the thickness of the fusion part is usually smaller than the thickness of the exterior body on the front body 1A side or the back body 1B side.
  • the exterior body 3 is arranged in the thickness direction in the step of forming the side seal portion 4. It is important to form the side seal portion 4 while suppressing the degree of compression.
  • a method for forming the side seal portion 4 while suppressing the compression of the outer package 3 fusing using a laser beam can be mentioned. That is, a method of forming the side seal portion 4 by using a laser beam as a fusing means of the outer package 3 and irradiating the laser beam to a portion where the side seal portion 4 is to be formed in the outer package 3 to melt it. It is done.
  • the diaper 1 mentioned above can be manufactured, for example with the manufacturing method demonstrated below.
  • the manufacturing method of the diaper 1 exists in the superposition
  • the exterior body 3 is divided and the division is performed.
  • the main body fixing process which fixes the absorptive main body 2 to the strip
  • the belt-shaped outer package 3 (outer layer sheet 31, inner layer sheet 32) is folded in the width direction.
  • the front body side and the back body side of the strip-shaped exterior body 3 to which the absorbent main body 2 is fixed are overlapped with each other, whereby “a precursor of a pants-type disposable diaper in which a side seal portion is not formed is unidirectional.
  • a continuous diaper 10 is produced.
  • belt-shaped exterior body 3 in this diaper continuous body 10 is divided
  • the cut-out side edge portions of a plurality of laminated exterior bodies 3 (outer layer sheet 31 and inner layer sheet 32) produced by the above are fused, and the exterior body 3 having a pair of side seal portions 4 and 4 is provided.
  • the pants-type disposable diaper 1 is continuously manufactured.
  • the waist elastic member 5 that forms the waist gather the waist elastic member 6 that forms the waist gather
  • the leg elastic member 7 that forms the leg gather have a predetermined elongation rate.
  • a plurality of each are arranged in the stretched state.
  • the leg elastic member 7 is arranged 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 (see FIG. (Not shown) 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 laser light irradiation in the sheets 31 and 32 (parts where the side seal portion 4 is to be formed, FIGS. 7 and 8).
  • the portion is arranged in a stretched state so as to straddle the portion scheduled to be divided indicated by the middle reference numeral 10C) It is preferable to apply an adhesive in the vicinity thereof.
  • a hot melt adhesive is intermittently applied to the waist elastic member 5 and the waist elastic member 6 by an adhesive application machine (not shown) before being arranged between the sheets 31 and 32. May be.
  • a joining means such as a convex roll 12 and an anvil roll 13 corresponding thereto.
  • a plurality of waistline elastic members 6 and a plurality of leg portion elasticities are made by using elastic member precut means (not shown) so as to correspond to positions where the absorbent main body 2 described later is disposed.
  • the 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 by 90 degrees. Then, it is intermittently supplied and fixed on the inner layer sheet 32 constituting the belt-shaped outer package 3 (main body fixing step). Then, as shown in FIG. 5, 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 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. 5, both side portions 3 a and 3 a along the conveying direction of the strip-shaped outer package 3 are folded back so as to cover both ends in the longitudinal direction X of the absorbent main body 2. After fixing both ends in the longitudinal direction X, the outer package 3 is folded in the width direction together with the absorbent main body 2 (polymerization step in the polymerization pressure step). In this way, the diaper continuous body 10 is obtained.
  • the diaper continuous body 10 thus manufactured is irradiated with laser light using a laser bonding device 20 to form a pair of side seal portions 4 and 4 (side seal portion).
  • a pants-type disposable diaper 1 having an exterior body 3 having a pair of side seal portions 4 is continuously manufactured.
  • the laser-type joining device 20 will be described.
  • the laser-type joining device 20 is arranged in a hollow cylindrical roll 23 that is rotationally driven in the direction of arrow A, as shown in FIG.
  • the irradiation head 35 which irradiates the laser beam 30 toward the cylindrical support member 21 forming the peripheral surface portion 23, and the belt type pressure device 26 including the endless pressure belt 24 (pressing member).
  • the laser-type bonding apparatus 20 includes a tension adjusting mechanism (not shown) that can adjust the tension of the pressure belt 24 wound around the outer peripheral surface of the annular support member 21 (the peripheral surface portion of the cylindrical roll 23). With this adjustment, 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.
  • the support member 21 forms a peripheral surface portion (contact portion with the workpiece) of the cylindrical roll 23, and is between a pair of annular frames 22, 22 that form both ends of the cylindrical roll 23 in the rotation axis direction. It is pinched and fixed.
  • the support member 21 is made of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramics.
  • the support member 21 has a light passage portion 27 through which laser light can pass.
  • the support member 21 has a slit-shaped opening 27 that penetrates the support member 21 in the thickness direction as a light passage portion.
  • the slit-shaped opening 27 has a shape corresponding to the shape of the outer edge of the side seal portion 4 to be formed (the shape of the fused portion 40) in plan view of the peripheral surface of the cylindrical roll 23. Is formed. That is, the opening 27 is formed in a continuous wave shape with a certain interval between the pair of frames 22 and 22.
  • the opening 27 has a longitudinal direction that intersects the conveyance direction A of the diaper continuous body 10 (band-shaped exterior body 3), more specifically, a direction parallel to the axial length direction of the rotation axis of the cylindrical roll 23.
  • a plurality of cylindrical support members 21 are formed at predetermined intervals in the circumferential direction.
  • the support member 21 allows the laser light to pass through the opening 27, but does not allow the laser light to pass (transmit) at portions other than the opening 27.
  • the support member 21 is replaced by a plurality of curved members instead of a single annular member, and the plurality of members are interposed between the pair of frame bodies 22 and 22. And a method of arranging the frame body 22 at a predetermined interval in the circumferential direction.
  • the support member 21 has a recess 28 on its outer surface (contact surface with the workpiece).
  • a plurality of recesses 28 are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21, and a slit-shaped opening 27 is formed in a region (convex part) located between two adjacent recesses 28, 28. Is formed.
  • the opening 27 is formed in 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. It is possible to introduce the diaper continuous body 10 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 28. Then, when the diaper continuous body 10 is introduced onto the support member 21 in this manner, as shown in FIG. 7B, the contact surface (the other surface) of the diaper continuous body 10 with the pressure belt 24 (pressing member). 10b) is substantially flat.
  • the portion of the diaper continuous body 10 located on the convex portion where the opening 27 is formed (reference numeral in FIG. 7).
  • 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.
  • the divided portion is configured. Do It becomes possible to more reliably fused to one other cutting edge of several sheets, further improvement in fusion strength of the side seal portion 4 (fused portion 40) is achieved.
  • the belt-type pressure device 26 includes an endless pressure belt 24 (pressing member) and three rolls 25a, 25b, and 25c that rotate while the pressure belt 24 is bridged. It has.
  • 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 cylindrical roll 23 (supporting member 21) by using any one or more of the rolls 25a, 25b, and 25c as a driving roll or rotating with the cylindrical 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 material having high thermal conductivity is specifically used from the viewpoint of forcibly cooling the cut edge portion of the diaper continuous body 10 (band-shaped sheet laminate) and promoting the formation of the fused portion.
  • metal materials such as iron, aluminum, stainless steel, and copper, and ceramics can be used.
  • a metal or resin belt having heat resistance capable of withstanding the heat generated during processing can be used, for example, iron, aluminum, stainless steel, or the like. What consists of metal materials can be used.
  • the pressure belt 24 a belt that does not transmit the laser beam irradiated to the workpiece (strip-shaped outer package 3) is usually used. You can also.
  • an irradiation head 35 that irradiates a laser beam 30 toward the support member 21 that forms the peripheral surface portion of the cylindrical roll 23 is provided in the hollow portion of the hollow cylindrical roll 23.
  • the irradiation head 35 is a galvano scanner (an apparatus having a motor shaft with a mirror) that freely scans the laser beam 30, a mechanism for moving the laser beam 30 back and forth in a direction parallel to the rotation axis of the cylindrical roll 23, and the laser beam 30.
  • the laser irradiation mechanism can arbitrarily move the irradiation point of the laser light 30 in both the circumferential direction of the cylindrical roll 23 and the direction orthogonal to the circumferential direction.
  • the diaper continuous body 10 includes a support member 21 that forms a peripheral surface portion of a cylindrical roll 23 that is rotationally driven in the direction of arrow A in a state where a predetermined tension is applied by a guide roll (not shown). After being transported by a predetermined distance in the circumferential direction by rotation of the cylindrical roll 23 so as to be wound around the support member 21, it is separated from the support member 21 by an unillustrated lead roll, nip roll or the like. . As described above, the diaper continuous body 10 is wound around the support member 21 forming the peripheral surface portion of the cylindrical roll 23 with a predetermined tension and is conveyed so as to be in pressure contact with the pressure belt 24.
  • the portion sandwiched between the support member 21 and the pressure belt 24 and the vicinity thereof are in a state of being pressurized (compressed) in the thickness direction from before being divided by the laser light irradiation.
  • the diaper continuous body 10 contains a nonwoven fabric, the diaper continuous body 10 can be more efficiently compressed, and as a result, the diaper continuous body 10 being compressed is irradiated with laser light.
  • this it becomes possible to fuse the cut side edges of the plurality of sheets (exterior body 3) constituting the divided portion more reliably, and the side seal portion 4 can be fused. The wearing strength is improved.
  • one surface 10 a forms a peripheral surface portion of the cylindrical roll 23, and a slit-shaped opening 27 (through which the laser beam 30 can pass).
  • Diaper continuum 10 (scheduled portion for forming side seal portion 4) brought into contact with the outer surface of support member 21 having a light passage portion and brought into a pressurized state by support member 21 and pressure belt 24 (pressing member).
  • the diaper continuous body 10 is divided at the same time. The cut edges of the plurality of sheets (exterior body 3) in the pressurized state are fused together to form the side seal portion 4 (side seal portion forming step).
  • FIG. 8 is a diagram illustrating a state in which the side seal part 4 (fused part 40) is formed at the same time as the diaper continuous body 10 (strip-shaped sheet laminate) is divided using the laser bonding apparatus 20.
  • FIG. 8A schematically shows a portion 10 ⁇ / b> C (a portion where the side seal portion 4 is to be formed) scheduled to be divided by the laser beam 30 of the diaper continuous body 10 and its vicinity.
  • segmentation scheduled parts of the diaper continuous body 10 in the aspect of illustration are the centers of the longitudinal direction (conveyance direction A) in the area
  • Such a portion 10C to be divided includes an end portion of the waist opening 8 (see FIG.
  • 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, 3a of the strip-shaped outer package 3 cover both ends in the longitudinal direction X of the absorbent main body 2 when the diaper continuous body 10 is manufactured.
  • the sheets (inner layer sheet 32) absorb the laser beam 30 and generate heat.
  • all of the four sheets 31 and 32 that constitute the scheduled division portion 10 ⁇ / b> C are sheets (nonwoven fabrics) that absorb the laser beam 30 and generate heat.
  • the two sheets of the outer layer sheet 31 and the inner layer sheet 32 that overlap each other in the vicinity of the portion 10C to be divided may be joined by an adhesive or the like before the irradiation with the laser beam 30, or may be joined at all. It is not necessary.
  • the diaper continuous body 10 has one surface 10 a in contact with the support member 21, and a portion 10 C (a portion where the side seal portion 4 is to be formed) on the slit-shaped opening 27.
  • the pressure belt 24 pressing member
  • the pressure belt 24 is pressed against the other surface 10b so that it is conveyed in the direction of the arrow A while being introduced onto the support member 21 that rotates in the direction of the arrow A so as to be positioned in the direction of the thickness A.
  • Pressure compression
  • the laser beam 30 is irradiated along the continuous wave shape of the opening part 27 from the support member 21 side through the opening part 27 with respect to 10 C of parts to be divided in the state of conveyance and a pressurization state.
  • the irradiation point of the laser beam 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 23, and is set to scan following the movement of the opening 27 along the circumferential direction. Therefore, the laser beam 30 is continuously irradiated for a certain period of time to the parting planned portion 10C located on the opening 27 during the conveyance.
  • the forming materials (fibers, etc.) of the sheets 31 and 32 existing in the parting portion 10C are vaporized by the heat generated by the direct irradiation of the laser light 30 and disappear.
  • the forming material existing in the vicinity of the parting portion 10 ⁇ / b> C is indirectly heated by the laser beam 30 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 side edges of the four sheets 31 and 32 in the sheet laminate of the single sheets generated by the division and the separated diaper continuous body 10 are separated.
  • the cut edge portions of the four sheets 31 and 32 are fused together.
  • the strip-shaped exterior body 3 is divided by the single laser light irradiation, and the exterior body 3 in the two pressurized states generated by the division is thus obtained.
  • the fusion and splitting can be performed with approximately half the laser output compared to the method of fusing the two fusion spots with two laser irradiations. It can be carried out in the same process, and the diaper 1 can be manufactured efficiently.
  • the cut side edges of the sheets 31 and 32 are heated and melted during the irradiation of the laser beam 30 and immediately after the end of the irradiation, but are separated from the diaper continuous body 10 by the irradiation of the laser beam 30.
  • the sheet diaper precursor and the diaper continuum 10 are maintained in a pressurized state by the support member 21 and the pressure belt 24, and are quickly cooled and solidified by the outside air after the irradiation is completed. It becomes the fusion
  • one of the pair of side seal parts 4 and 4 in one diaper 1 is formed. If necessary, the cutting edge of the sheets 31 and 32 is forcibly cooled by using a known cooling means such as a suction device or an exhaust device, and the formation of the fused portion (seal edge) 40 is promoted. May be.
  • the laser beam 30 seems to hit another opening 27 adjacent to the irradiation direction in the direction opposite to the conveyance direction A. And is irradiated to another parting planned portion 10C located thereabove through the other opening 27.
  • another part 10C to be divided is divided and fused in the same manner as described above, and the other wavy side seal part 4 (fused part 40) is paired with the wave-like side seal part 4 previously formed. It is formed.
  • the pants-type disposable diaper 1 including the exterior body 3 having the pair of corrugated side seal portions 4 and 4 is continuously manufactured.
  • the side seal portion 4 includes the side edge portion A1 of the exterior body 3 in the front body F and the side edge portion B1 of the exterior body 3 in the rear body R in the longitudinal direction of the side seal portion 4. It is formed by being joined by a continuous wave fusion part (seal edge part) 40 extending to X. Further, the side seal portion 4 in at least a part of the region extending from the waist opening 8 to the leg opening 9 is convex and concave in the width direction outward and concave in the width direction when the diaper 1 is viewed from the front. Are formed in a concavo-convex shape alternately arranged in the vertical direction. Therefore, the visibility of the side seal part 4 is improved, and the uneven shape makes it difficult to irritate the wearer's skin.
  • region ranging from the waist opening part 8 to the leg opening part 9 is formed in uneven
  • the side seal portion 4 of the diaper 1 is formed in a continuous wave shape over the entire region from the waist opening 8 to the leg opening 9 with the convex and concave adjacent to each other in the longitudinal direction X smoothly connected. . Therefore, the visibility of the side seal part 4 is further improved, and the wave shape does not further irritate the wearer's skin.
  • the side seal part 4 is not separated from the side seal part 4 and does not tear laterally. It can be recognized sensuously that it is torn.
  • the thickness T of the fused part (seal edge) 40 is equal to or smaller than the total thickness (Ta + Tb) of the exterior body, and the thickness Ta of the exterior body on the front body side or the back body side
  • the side seal portion 4 larger than the thickness Tb of the outer casing can be easily obtained by appropriately adjusting the degree of pressurization when irradiating the laser beam, the output of the laser beam, and the spot diameter.
  • the outer edge 4a which consists of a melt
  • the side seal part 4 does not have a part where the constituent fibers of the exterior body 3 leave the fiber shape outside the fusion part (seal edge part) 40 in the inner / outer direction P. Therefore, the appearance is good and the touch is improved.
  • the diaper 1 having a pair of side seal portions 4 and 4 obtained through a process in which the outer body 3 is divided and welded at the same time is excellent in the flexibility and touch of the side seal portion 4, and the feeling of wear Is good.
  • the uneven side seal portion 4 in which unevenness is alternately arranged in the vertical direction is easy to tear when it is torn after use. Whether or not it is easy to tear can be determined by measuring the behavior when tearing the side seal portion by the following measuring method.
  • a cut sample is cut out by cutting into a rectangular shape of 74 mm in the vertical direction and 37 mm in the horizontal direction with the side seal portion as the center in the horizontal direction.
  • a cut is made along the side seal portion from the longitudinal upper end of the cut sample, and a test piece is prepared so that the length of the side seal portion is 50 mm.
  • a tensile tester for example, “AG-X CL11 / 1000” manufactured by Shimadzu Corporation
  • the distance between the upper and lower chucks is adjusted to 20 mm (interval that allows the test piece to be inserted).
  • FIG. 9 (a) shows the behavior of the seal strength when the side seal portion 4 of the diaper 1 is torn in the vertical direction
  • FIG. 9 (b) shows a straight side seal portion in the vertical direction.
  • sticker strength at the time of tearing the linear side seal part of the comparative example of a comparative example provided and the linear side seal part of a comparative example to a vertical direction is shown.
  • the behavior when tearing the uneven side seal portion 4 of the diaper 1 shown in FIG. 9A is compared with the behavior when tearing the straight side seal portion of the diaper of the comparative example shown in FIG. 9B. It can be seen that periodically, a behavior in which the seal strength becomes very low is seen, and that it is easy to tear in the longitudinal direction after use.
  • the wavelength of the laser beam irradiated to the diaper continuous body 10 is absorbed by the sheets (outer layer sheet 31 and inner layer sheet 32) constituting the outer package 3 and generates heat.
  • the laser beam is used.
  • the “sheet constituting the exterior body” is not limited to the sheet (for example, the outer layer sheet 31 in the above-described embodiment) constituting one surface of the exterior body (the contact surface with the support member 21). Any sheet may be used as long as the sheet is configured.
  • the laser light applied to the outer package is a wavelength that is absorbed by the sheet and generates heat for the individual sheets constituting the outer package depends on the material of the sheet and the wavelength of the laser beam used. It depends on the relationship.
  • the laser beam may be CO 2 laser, YAG It is preferable to use a laser, an LD laser (semiconductor laser), a YVO4 laser, a fiber laser, or the like.
  • seat which comprises an exterior body contains polyethylene, a polyethylene terephthalate, a polypropylene etc. as a synthetic resin, as a wavelength which can be absorbed by this sheet
  • the spot diameter of laser light, laser output, and the like can be appropriately selected in consideration of the material and thickness of the sheet constituting the exterior body.
  • the side seal portion 4 in the entire region extending from the waist opening 8 to the leg opening 9 is formed in an uneven shape, but a part on the waist opening 8 side.
  • the side seal part 4 in a part of the leg opening 9 or a part of the area between the waist opening 8 and the leg opening 9 may be formed in an uneven shape.
  • the protrusion may be formed in a jagged shape in which a protrusion extending in a triangular shape outward in the width direction Y and a recess recessed in a triangular shape inward in the width direction Y are connected.
  • the belt-shaped outer package is a stack of four sheets as shown in FIG. 8 (a), or two, three, or five or more sheets. May be.
  • the exterior body 3 in the above embodiment is not divided into the ventral part 1A and the dorsal part 1B, but an hourglass extending over the ventral part 1A, the crotch part 1C, and the dorsal part 1B.
  • the exterior body in the present invention is not limited to such a continuous shape, and, for example, an abdominal sheet member disposed on the abdomen side (front side) of the wearer It is divided
  • seat member distribute
  • the polymerization pressurizing step includes a front body side (a belt-like stomach side sheet member) of the belt-like exterior body to which the absorbent main body is fixed. A site where the side seal portion is to be formed in the belt-shaped exterior body having a configuration in which the back body side (band-shaped backside sheet member) is superimposed is brought into a pressurized state.
  • pant-type wearing article in the present invention is not limited to a pant-type disposable diaper, and may be a pant-type sanitary napkin. It may be a diaper cover or the like that does not include
  • the description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.
  • An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body
  • a pants-type wearing article in which a part is formed Each of the pair of side seal portions is a continuous linear fusion portion in which a side edge portion of the exterior body in the front body and a side edge portion of the exterior body in the back body extend in the longitudinal direction of the side seal portion.
  • the side seal portion in at least a part of the region extending from the waist opening to the leg opening is convex outward in the width direction and concave inward in the width direction when the pants-type wearing article is viewed from the front.
  • a pants-type wearing article formed in an uneven shape in which unevenness is alternately arranged in the vertical direction.
  • the side seal portion in the entire region extending from the waist opening to the leg opening has a convex shape outward in the width direction and a concave and convex shape in the width direction in the vertical direction when the pant-type wearing article is viewed from the front.
  • the outer edge of the seal edge portion In a cross section orthogonal to the direction in which the side seal portion extends, the outer edge of the seal edge portion has a convex arc shape toward the inside of the wearing article, and includes the outer edge and is further inward of the wearing article.
  • the fusion part between the sheets constituting the exterior body is formed, and the fusion part is wider in the central part in the thickness direction of the exterior body than both ends, ⁇ 1> to ⁇ 3>
  • the underpants type wearing article of any one of 3.
  • ⁇ 5> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 4>, wherein the side seal portion does not have a non-joining portion outward in the width direction from the fusion portion.
  • ⁇ 6> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 5>, wherein the shape of the seal edge is the shape of the outer edge of the side seal portion in the width direction Y outside.
  • the exterior body is disposed on an outer layer sheet that forms an outer surface of the pants-type wearing article (non-skin contact surface of the outer body), and an inner surface side of the pants-type wearing article.
  • ⁇ 1> to ⁇ 6> including an inner layer sheet forming a skin contact surface of the body) and a plurality of thread-like or belt-like elastic members fixed between the two sheets with an adhesive.
  • ⁇ 8> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 7>, wherein the exterior body (the outer layer sheet, the inner layer sheet) includes a resin material and is formed using the resin material as a main component. .
  • the exterior body includes a heat-fusible synthetic resin such as polyethylene, polyethylene terephthalate, or polypropylene as a resin material. Mold wearing article.
  • the outer package is formed of a nonwoven fabric, a film, a laminate sheet of a nonwoven fabric and a film, or the like.
  • the side seal portion has a convex and a concave portion adjacent to each other in the longitudinal direction X corresponding to the wearer's front-rear direction in a developed and extended plan view, and smoothly extends from the waist opening to the leg opening.
  • the pants-type wearing article according to any one of ⁇ 1> to ⁇ 10>, wherein the article is formed in a continuous wavy shape over the entire area.
  • the height (h) of the convex shape outward in the width direction (the distance between the apex of the convex shape and the bottom point of the concave shape adjacent to the convex shape,
  • the height of the amplitude of the convex shape and the concave shape is 1 mm or more and 20 mm or less, preferably 2 mm or more and 5 mm or less.
  • the pants-type wearing article according to any one of the above items ⁇ 1> to ⁇ 12>, wherein the uneven shape of the side seal portion is a wave shape in which a convex and a concave adjacent to each other in the vertical direction X are smoothly connected.
  • the uneven shape of the side seal part is formed in a jagged shape in which a convex extending in a triangular shape outward in the width direction Y and a concave recessed in a triangular shape in the width direction Y are connected.
  • the article for wearing underpants according to any one of> to ⁇ 12>.
  • pant-type wearing article according to any one of ⁇ 1> to ⁇ 14>, wherein the pant-type wearing article includes an absorbent main body and the exterior body that forms an outer surface of the wearing article.
  • the above-mentioned pant-type wearing article is a pant-type sanitary napkin or a diaper cover that includes an exterior body that forms an outer surface of the wearing article but does not include an absorbent main body.
  • the underpants type wearing article of any one of 14. ⁇ 17> The pants-type wearing article according to any one of the above items ⁇ 1> to ⁇ 16>, wherein the side seal portion has no non-bonded portion outward in the width direction from the fusion portion.
  • the fusion part has a width W in the inner and outer direction from the side closer to the wearer's skin of the pant-type wearing article, and the center of the width W.
  • the thickness T of the fusion part is equal to or smaller than the total thickness of the outer body on the front body side and the outer body on the rear body side, and the thickness T of the fusion part is the outer body on the front body side.
  • the ratio of the thickness T of the fused portion to the thickness of the outer body on the front body side and the thickness of the outer body on the rear body side is 110 to 300%, preferably 150 to 200% ⁇ 1>
  • the thickness T of the fused part is 0.05 to 2.0 mm, preferably 0.1 to 1.mm, in difference between the thickness of the outer body on the front body side and the thickness of the outer body on the rear body side.
  • ⁇ 22> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 21>, wherein the width W of the fusion part is smaller than the thickness T of the fusion part.
  • ⁇ 23> The pants type according to any one of ⁇ 1> to ⁇ 22>, wherein the width W of the fusion part is 10 to 95%, preferably 30 to 70%, of the thickness T of the fusion part Wearing articles.
  • ⁇ 25> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 24>, wherein the width W of the fusion part is 0.1 mm or more.
  • ⁇ 26> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 25>, wherein the thickness T of the fusion part is 0.3 mm or more, and the width W of the fusion part is less than 0.3 mm. .
  • the exterior body is divided by irradiating a laser beam through a light passage portion extending in a direction crossing the conveyance direction A of the exterior body, and the exterior of the laminated state generated by the division
  • the side seal portion forming step irradiates a laser beam using a laser type bonding apparatus 20,
  • the laser-type joining device is directed to a hollow cylindrical roll that is rotationally driven in the transport direction (A direction) and a cylindrical support member that is disposed in a hollow portion of the cylindrical roll and forms a peripheral surface portion of the cylindrical roll.
  • the support member has a light passage part through which laser light can pass, and the light passage part is a slit-like opening that penetrates the support member in the thickness direction,
  • the slit-shaped opening is a method for manufacturing a pants-type wearing article in which the slit-shaped opening is formed in a continuous wave shape with a certain interval.
  • the cut side edge of the strip-shaped outer package is a single-wafer pant-type wearing article precursor cut from a continuous body of the pants-type wearing article by laser light irradiation, and the support of each of the pants-type wearing article While maintaining the pressurized state by the member and the pressure belt, it is cooled and solidified after the irradiation is completed, and the fused portion (seal) in which the forming material (fibers, etc.) of the cut side edge is fused and integrated
  • the cylindrical support member has a recess on its outer surface, and a plurality of the recesses are formed at predetermined intervals in the circumferential direction of the cylindrical support member, and between the two adjacent recesses.
  • the visibility of the side seal portion is improved and it is difficult to irritate the wearer's skin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Textile Engineering (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Un mode de réalisation de la présente invention concerne une couche jetable (1) dotée d'un doublage externe (3) formant sa surface externe, et les deux côtés latéraux (A1, A1) du doublage externe (3) à l'avant du corps (F) sont réunis aux deux côtés latéraux (B1, B1) du doublage externe (3) à l'arrière du corps (R), formant ainsi deux joints latéraux (4, 4), une ouverture à la taille (8), et deux ouvertures pour les jambes (9, 9). Les joints latéraux (4) sont formés par les côtés latéraux (A1) du doublage externe (3) à l'avant du corps (F) et les côtés latéraux (B1) du doublage externe (3) à l'arrière du corps (R) étant réunis au niveau d'une section de fusion (bord joint) (40) ayant la forme d'une ligne continue s'étendant dans la direction verticale (X). Les joints latéraux (4) au niveau d'une région partielle de la région s'étendant de l'ouverture de la taille (8) aux ouvertures pour les jambes (9) ont une forme bosselée de telle sorte que, la couche vue de face (1), des convexités vers l'extérieur dans le sens de la largeur et des concavités vers l'intérieur dans le sens de la largeur soient disposées par alternance dans la direction verticale.
PCT/JP2014/078702 2013-11-01 2014-10-29 Couche jetable WO2015064606A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480059214.4A CN105682629B (zh) 2013-11-01 2014-10-29 一次性尿布

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-228019 2013-11-01
JP2013228019A JP5822278B2 (ja) 2013-11-01 2013-11-01 使い捨ておむつ

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Publication Number Publication Date
WO2015064606A1 true WO2015064606A1 (fr) 2015-05-07

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PCT/JP2014/078702 WO2015064606A1 (fr) 2013-11-01 2014-10-29 Couche jetable

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CN (1) CN105682629B (fr)
WO (1) WO2015064606A1 (fr)

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US11426310B2 (en) 2017-02-27 2022-08-30 The Procter & Gamble Company Absorbent article having elastic belt

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WO2013172343A1 (fr) 2012-05-16 2013-11-21 花王株式会社 Procédé de fabrication de feuilles fondues
JP6161029B2 (ja) 2013-06-28 2017-07-12 花王株式会社 パンツ型着用物品及びその製造方法
JP5766252B2 (ja) 2013-11-01 2015-08-19 花王株式会社 パンツ型着用物品及びその製造方法
JP6556043B2 (ja) * 2015-12-09 2019-08-07 花王株式会社 シート融着体の製造方法及び製造装置
EP3429524B1 (fr) 2016-03-15 2019-11-20 The Procter and Gamble Company Procédés et appareils pour séparer et positionner des articles individuels
JP6503432B1 (ja) * 2017-10-04 2019-04-17 ユニ・チャーム株式会社 伸縮性シート及び吸収性物品

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JP2006087564A (ja) * 2004-09-22 2006-04-06 Kao Corp 吸収性物品の製造方法
JP2010188629A (ja) * 2009-02-18 2010-09-02 Kao Corp シート融着体の製造方法及びレーザー式接合装置
WO2011156299A1 (fr) * 2010-06-07 2011-12-15 The Procter & Gamble Company Structure de joint et procédé pour la fabrication d'un joint
JP2012070917A (ja) * 2010-09-28 2012-04-12 Daio Paper Corp パンツタイプ使い捨ておむつ

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JP4863768B2 (ja) * 2006-05-25 2012-01-25 花王株式会社 パンツ型使い捨ておむつ
JP5328203B2 (ja) * 2008-03-31 2013-10-30 ユニ・チャーム株式会社 使い捨て吸収性着用物品
CN103221195B (zh) * 2010-11-22 2016-03-23 花王株式会社 片材熔接体的制造方法和片材熔接体
JP5828505B2 (ja) * 2011-08-23 2015-12-09 花王株式会社 パンツ型吸収性物品

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JP2006087564A (ja) * 2004-09-22 2006-04-06 Kao Corp 吸収性物品の製造方法
JP2010188629A (ja) * 2009-02-18 2010-09-02 Kao Corp シート融着体の製造方法及びレーザー式接合装置
WO2011156299A1 (fr) * 2010-06-07 2011-12-15 The Procter & Gamble Company Structure de joint et procédé pour la fabrication d'un joint
JP2012070917A (ja) * 2010-09-28 2012-04-12 Daio Paper Corp パンツタイプ使い捨ておむつ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11426310B2 (en) 2017-02-27 2022-08-30 The Procter & Gamble Company Absorbent article having elastic belt

Also Published As

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CN105682629A (zh) 2016-06-15
CN105682629B (zh) 2019-08-16
JP5822278B2 (ja) 2015-11-24
JP2015085091A (ja) 2015-05-07

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