WO2014208636A1 - Device for producing fused sheet body, and method for producing fused sheet body - Google Patents

Device for producing fused sheet body, and method for producing fused sheet body Download PDF

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Publication number
WO2014208636A1
WO2014208636A1 PCT/JP2014/066921 JP2014066921W WO2014208636A1 WO 2014208636 A1 WO2014208636 A1 WO 2014208636A1 JP 2014066921 W JP2014066921 W JP 2014066921W WO 2014208636 A1 WO2014208636 A1 WO 2014208636A1
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WIPO (PCT)
Prior art keywords
sheet
support member
belt
shaped
laser beam
Prior art date
Application number
PCT/JP2014/066921
Other languages
French (fr)
Japanese (ja)
Inventor
伸二 浜本
拓郎 梁島
康至 今井
淳 岩崎
邦利 山田
Original Assignee
花王株式会社
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Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480033080.9A priority Critical patent/CN105307838B/en
Priority to BR112015032503-3A priority patent/BR112015032503A2/en
Publication of WO2014208636A1 publication Critical patent/WO2014208636A1/en

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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
    • B29C66/80—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
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15804—Plant, e.g. involving several steps
    • 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
    • B29C66/40—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
    • 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
    • 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
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15861—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding
    • A61F2013/15878—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding by thermal bonding
    • 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
    • B29C66/70—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
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Botany (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laser Beam Processing (AREA)

Abstract

A device (20) for producing a fused sheet body is provided with: an irradiation head (35) having a lens (351); a support member (21) for transporting a belt-like sheet laminate (10); and a pressing member (24) for applying pressure to the sheet laminate (10). The support member (21) has slit-like opening parts (27) through which laser light (30) can pass. In cross-sectional view, both end parts (21e) of the support member (21) forming the opening parts (27) have tapered parts (211), the space therebetween being wider towards the irradiation head (35) than towards the pressing member (24). The production device (20) cuts the sheet laminate (10), to which pressure is applied, by irradiating same with laser light (30) along the opening parts (27), and fuses the cut edges while the edges overlap, thereby continuously producing a fused sheet body (3) having sealed edges (4).

Description

シート融着体の製造装置及びシート融着体の製造方法Sheet fusion body manufacturing apparatus and sheet fusion body manufacturing method
　本発明は、複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法及びその製造方法に関する。 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 method for manufacturing the same.
　従来、使い捨ておむつや生理用ナプキン等の吸収性物品の製造工程においては、重ね合わせたシートどうしの接合にヒートロール装置が汎用されている。また、他の接合方法として、レーザー光線を用いて溶着する方法も知られている（例えば、特許文献１～２参照）。 Conventionally, in the manufacturing process of absorbent articles such as disposable diapers and sanitary napkins, a heat roll apparatus has been widely used for joining stacked sheets. As another bonding method, a method of welding using a laser beam is also known (see, for example, Patent Documents 1 and 2).
　特許文献１には、レーザー光を反射させる反射鏡、反射されたレーザー光を集光する集光レンズ、集光されたレーザー光を照射させる加工ノズルを備えた金属製メッシュ布を切断するレーザー照射装置が記載されている。また、特許文献２には、ノズルのノズル孔を通じてレーザー光を照射して鋼材を溶融させるレーザー照射装置が記載されている。 Patent Document 1 discloses laser irradiation for cutting a metal mesh cloth provided with a reflecting mirror for reflecting laser light, a condensing lens for condensing the reflected laser light, and a processing nozzle for irradiating the condensed laser light. An apparatus is described. Patent Document 2 describes a laser irradiation apparatus that melts a steel material by irradiating a laser beam through a nozzle hole of a nozzle.
　しかし、特許文献１～２に記載のレーザー照射装置は、レーザー光を照射して加工する対象物が固定されている装置であり、特許文献１～２には、該対象物を搬送しながらレーザー光を照射させて加工することに関して、何ら記載されていない。 However, the laser irradiation apparatuses described in Patent Documents 1 and 2 are apparatuses in which an object to be processed by irradiating a laser beam is fixed. In Patent Documents 1 and 2, a laser is conveyed while conveying the object. There is no description regarding processing by irradiating light.
　対象物を搬送しながらレーザー光を照射させて加工する技術として、特許文献３には、レーザー光を反射するミラーと、入射されたレーザー光を拡径するビームエクスパンダと、入射されたレーザー光を多数のレーザー光に分割する多眼レンズとを備え、搬送されているテープにレーザー光を照射して溶融・加工するレーザー照射装置が記載されている。 As a technique for processing by irradiating laser light while conveying an object, Patent Document 3 discloses a mirror that reflects laser light, a beam expander that expands the diameter of incident laser light, and incident laser light. And a multi-lens lens that splits the laser beam into a plurality of laser beams, and a laser irradiation device that melts and processes the tape being transported by irradiating the laser beam is described.
特開昭６４－４８６９０号公報JP-A-64-48690 特開平８－１７４２４３号公報JP-A-8-174243 特開２００１－８４５８１号公報JP 2001-84581 A
　特許文献３に記載のレーザー照射装置は、レーザー光を照射して加工する対象物が搬送されている装置ではあるが、特許文献３に記載のレーザー照射装置は、多眼レンズにより分割された多数のレーザー光を、搬送されているテープの搬送方向に照射して、搬送方向に延在する多数の加工線等を形成するものである。従って、特許文献３には、搬送されているテープの幅方向にレーザー光を照射して加工することに関して、何ら記載されていない。また、特許文献３には、搬送されているテープの幅方向にレーザー光を照射する際に、レーザー光のエネルギーロスを考慮して照射することに関して、何ら記載されていない。 The laser irradiation apparatus described in Patent Document 3 is an apparatus in which an object to be processed by irradiating laser light is conveyed. However, the laser irradiation apparatus described in Patent Document 3 has a large number of parts divided by a multi-lens lens. Are irradiated in the transport direction of the tape being transported to form a large number of processed lines extending in the transport direction. Therefore, Patent Document 3 does not describe anything about processing by irradiating a laser beam in the width direction of the tape being conveyed. Further, Patent Document 3 does not describe anything about irradiation with consideration of energy loss of laser light when irradiating laser light in the width direction of the tape being conveyed.
　従って、本発明は、上記課題を解消し得るシート融着体の製造装置及びその製造方法を提供することに関する。 Therefore, the present invention relates to providing a sheet fusion body manufacturing apparatus and method for solving the above problems.
　本発明は、複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置に関する。レーザー光を集光するレンズを有する照射ヘッドと、少なくとも一部に樹脂材を含む複数枚のシートが重ねられた帯状のシート積層体の一方の面を支持しながら搬送する支持部材と、該帯状のシート積層体の他方の面側から該支持部材に該帯状のシート積層体を当接させ加圧状態にする押さえ部材とを具備している。前記支持部材は、集光されたレーザー光が該支持部材側から通過可能な、前記シート積層体の幅方向に長いスリット状の開口部を有している。前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部には、それぞれ、互いの間隔が前記押さえ部材側よりも前記照射ヘッド側の方が広がるテーパーが設けられている。前記押さえ部材による加圧状態の前記帯状のシート積層体に、前記支持部材側から集光されたレーザー光を前記スリット状の開口部に沿って照射して分断すると共に、この分断の縁部を重なった状態で融着し、前記シール縁部を有するシート融着体を複数個連続的に製造する。 The present invention relates to an apparatus for manufacturing a sheet fusion body having a seal edge portion fused in a state where edges of a plurality of sheets overlap. An irradiation head having a lens for condensing laser light, a support member that conveys while supporting one surface of a belt-shaped sheet laminate in which a plurality of sheets including a resin material at least partially are stacked, and the belt shape And a pressing member that brings the belt-shaped sheet laminate into contact with the support member from the other surface side of the sheet laminate to bring it into a pressurized state. The support member has a slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser light can pass from the support member side. When the opening is viewed in cross section, both ends of the support member that form the slit-shaped opening are provided with a taper in which the distance between them is larger on the irradiation head side than on the pressing member side. It has been. The belt-shaped sheet laminate in a pressurized state by the pressing member is divided by irradiating the laser beam condensed from the support member side along the slit-shaped opening, and the edge of the division is divided. A plurality of sheet-fused bodies having the seal edge are continuously produced by fusing in the overlapped state.
　また、本発明は、複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法であって、前記複数枚のシートの少なくとも一部のシートは樹脂材を含み、前記複数枚のシートが重ねられた帯状のシート積層体の一方の面を、集光されたレーザー光が通過可能な、該シート積層体の幅方向に長いスリット状の開口部を有する支持部材に当接させて加圧状態となりながら搬送される該帯状のシート積層体に対して、該支持部材側から該スリット状の開口部に沿って、該シート積層体を構成するシートに吸収され該シートを発熱させる発振波長のレーザー光を照射ヘッドから照射することにより、該帯状のシート積層体を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシートの切断縁部どうしを融着させて前記シール縁部を形成するシール縁部形成工程を有し、前記シール縁部形成工程は、前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部それぞれに、互いの間隔が前記帯状のシート積層体側よりも前記照射ヘッド側の方が広がるテーパーを設けて行うシート融着体の製造方法を提供するものである。 Further, the present invention is a method for producing a sheet fusion body having a seal edge portion fused in a state where edges of a plurality of sheets are overlapped, wherein at least a part of the plurality of sheets is a resin. A slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser beam can pass through one surface of the belt-like sheet laminate in which the plurality of sheets are stacked. A sheet constituting the sheet laminate along the slit-shaped opening from the support member side with respect to the belt-like sheet laminate conveyed while being brought into contact with a supporting member and being in a pressurized state By irradiating a laser beam having an oscillation wavelength that is absorbed and generates heat from the irradiation head, the strip-shaped sheet laminate is divided at the same time, and the plurality of sheets in the pressurized state generated by the division are separated. Cutting edge A seal edge forming step for forming the seal edge by fusing each other, wherein the seal edge forming step is a cross-sectional view of the opening to form the slit-shaped opening; The present invention provides a method for producing a sheet fusion product, in which both end portions of a member are provided with a taper in which the distance between the members is greater on the irradiation head side than on the belt-like sheet laminate side.
　また、本発明のシート融着体の製造方法によれば、搬送されている対象物の幅方向にレーザー光を照射して加工する際に、レーザー光のエネルギーロスを抑えて照射でき、シートの縁部が重なった状態で融着したシール縁部を有するシート融着体を効率的に製造することができる。 Further, according to the method for producing a sheet fusion body of the present invention, when processing is performed by irradiating laser light in the width direction of the object being conveyed, the energy loss of the laser light can be suppressed and irradiation can be performed. It is possible to efficiently manufacture a sheet fusion body having a seal edge portion fused in a state where the edges overlap.
図１は、本発明の一実施形態のレーザー式接合装置を用いて製造されるパンツ型使い捨ておむつを模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing a pants-type disposable diaper manufactured using a laser-type bonding apparatus according to an embodiment of the present invention. 図２は、図１のＩ－Ｉ線断面を模式的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 図３（ａ）及び図３（ｂ）は、それぞれ、図２に示すおむつのウエスト開口部を拡げた状態における、片側のサイドシール部（シール縁部）及びその近傍の図２相当図である。3 (a) and 3 (b) are diagrams corresponding to FIG. 2 of the side seal part (seal edge part) on one side and the vicinity thereof in a state where the waist opening of the diaper shown in FIG. 2 is expanded. . 図４は、本発明の一実施態様であるレーザー式接合装置を用いたパンツ型使い捨ておむつの製造方法の一例の概略斜視図である。FIG. 4 is a schematic perspective view of an example of a method for manufacturing a pants-type disposable diaper using the laser-type bonding apparatus according to an embodiment of the present invention. 図５は、図４に示すレーザー式接合装置におむつ連続体（帯状のシート積層体）が導入された状態を模式的に示す図であり、図５（ａ）は、押さえ部材の一部を破断して示す上面図、図５（ｂ）は、図５（ａ）のＩＩ－ＩＩ線断面図である。FIG. 5 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. 4, and FIG. 5 (a) shows a part of the pressing member. FIG. 5B is a cross-sectional view taken along the line II-II of FIG. 5A. 図６は、図４のＩＩＩ－ＩＩＩ線断面図であり、図６（ａ）は１つの開口部２７が円筒ロール２３の回転に伴って移動する際において、（ｂ）の上流側に位置するときの線断面図であり、図６（ｂ）は垂線ＰＬと仮想線ＩＬが重なる位置での線断面図であり、図６（ｃ）は（ｂ）の下流側に位置するときの線断面図である。6 is a cross-sectional view taken along the line III-III of FIG. 4, and FIG. 6A is located upstream of (b) when one opening 27 moves as the cylindrical roll 23 rotates. 6 (b) is a line cross-sectional view at a position where the perpendicular line PL and the virtual line IL overlap, and FIG. 6 (c) is a line cross-section when located on the downstream side of (b). FIG. 図７は、支持部材の端部のテーパーが一定の角度で形成されていない場合のテーパー角度（θ）を説明する図である。FIG. 7 is a diagram illustrating the taper angle (θ) when the taper at the end of the support member is not formed at a constant angle. 図８は、図４に示すおむつ連続体（帯状のシート積層体）の製造工程を模式的に示す斜視図である。FIG. 8 is a perspective view schematically showing a manufacturing process of the diaper continuous body (strip-shaped sheet laminate) shown in FIG. 4. 図９は、図４に示すレーザー式接合装置を用いておむつ連続体（帯状のシート積層体）を分断するのと同時にサイドシール部（シール縁部）を形成する様子を説明する説明図である。FIG. 9 is an explanatory view for explaining a state in which the side seal part (seal edge part) is formed at the same time as the diaper continuous body (band-shaped sheet laminate) is divided using the laser type bonding apparatus shown in FIG. . 図１０は、図４に示す装置の他の変形例を示す図である。FIG. 10 is a diagram showing another modification of the apparatus shown in FIG.
発明の詳細な説明Detailed Description of the Invention
　以下、本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。
　ここで、本実施形態の製造装置及び本実施態様の製造方法で製造されるシート融着体、即ち、複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体は、例えば、図１及び図２に示すような、一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１である。先ず、図１～図３に基づいてパンツ型使い捨ておむつ１について説明する。 Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
Here, a sheet fusion body manufactured by the manufacturing apparatus of the present embodiment and the manufacturing method of the present embodiment, that is, a sheet fusion having a seal edge fused in a state where edges of a plurality of sheets are overlapped. A body is the underpants type disposable diaper 1 which comprises the exterior body 3 which has a pair of side seal parts 4 and 4 as shown in FIG.1 and FIG.2, for example. First, the pants-type disposable diaper 1 will be described with reference to FIGS.
　おむつ１は、図１及び図２に示すように、吸収性本体２と、該吸収性本体２の非肌当接面側に配されて該吸収性本体２を固定している外装体３とを備え、且つ腹側部１Ａにおける外装体３の両側縁部と背側部１Ｂにおける該外装体の両側縁部とが接合されて一対のサイドシール部４，４、ウエスト開口部８及び一対のレッグ開口部９，９が形成されているパンツ型使い捨ておむつであり、このサイドシール部４が、前記の「複数枚のシートの縁部が重なった状態で融着したシール縁部」に相当する部分である。 As shown in FIGS. 1 and 2, 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.
　本実施形態の製造装置及び本実施態様の製造方法で製造されるおむつ１の主たる特長部分の１つとして、サイドシール部４が挙げられる。図２及び図３に示す如き、サイドシール部４の延びる方向と直交する方向（おむつ１の幅方向）の断面視において、レーザー光の照射による分断によって生じたサイドシール部４の外縁４ａが、外装体３（シート融着体）の内方に向かって凸の弧状をなし、且つ外縁４ａを含んでそれよりも外装体３の内方に、該外装体３を構成する４枚のシート３１，３２どうしの融着部４０が形成され、該融着部４０は、該外装体３の厚み方向（図２の上下方向）の中央部が両端部（上端部及び下端部）に比して幅が広い。即ち、融着部４０は、おむつ１をその幅方向（レーザー光による分断方向と直交する方向）に断面視したときに、厚み方向において中央部に向けて融着部４０の幅が徐々に広くなっており、所謂、三日月状又は半月状に形成されている。尚、図２に示す融着部４０は、三日月状である。 The side seal part 4 is mentioned as one of the main characteristic parts of the diaper 1 manufactured with the manufacturing apparatus of this embodiment and the manufacturing method of this embodiment. As shown in FIGS. 2 and 3, the outer edge 4a of the side seal portion 4 generated by the division by the irradiation of the laser beam in a cross-sectional view in the direction orthogonal to the extending direction of the side seal portion 4 (width direction of the diaper 1) Four sheets 31 constituting the outer package 3 are formed in an arc shape convex toward the inner side of the outer package 3 (sheet fusion product), and include the outer edge 4a and more on the inner side of the outer package 3 than the outer edge 4a. 32, the fusion part 40 is formed, and the fusion part 40 has a center part in the thickness direction (vertical direction in FIG. 2) of the exterior body 3 as compared to both end parts (upper end part and lower end part). Wide. That is, when the diaper 1 is viewed in cross-section in the width direction (direction perpendicular to the dividing direction by the laser beam), the fusion part 40 is gradually widened toward the center part in the thickness direction. It is formed in a so-called crescent or half moon shape. Note that the fused portion 40 shown in FIG. 2 has a crescent shape.
　一般的に、サイドシール部とは、シートの形成材料が溶融固化してなる融着部の存在により、おむつの他の部位に比して硬くて肌触りが悪く、おむつの着用感を低下させる原因となり得る部位である。しかし、おむつ１の有するサイドシール部４のように、融着部４０がおむつ１の幅方向の断面視において三日月状又は半月状に形成されていると、従来のサイドシール部における融着部のように同断面視において矩形形状に形成されている場合に比して、サイドシール部４を構成する外装体３の側縁部の角部３Ｓ（図３参照）に存する融着部４０の割合が減少し、これにより角部３Ｓが本来有する柔軟性、肌触り感が損なわれ難くなる。そのため、おむつ１は、従来品に比しておむつの着用感が向上する。一方、サイドシール部４の融着強度に大きな影響を及ぼす部位である、外装体３の側縁部の厚み方向の中央部（外装体３の一面側の角部３Ｓと他面側の３Ｓとに挟まれた部分の中央部）には、十分な量の融着部４０が存しているため、サイドシール部４は実用上十分な融着強度を有し、おむつ１の着用中にサイドシール４が破れる等の不都合が生じ難い。 In general, the side seal part is a cause that reduces the feeling of wearing of the diaper due to the presence of the fused part formed by melting and solidifying the sheet forming material, which is harder and softer than other parts of the diaper. It is a possible part. However, like the side seal part 4 of the diaper 1, if the fusion part 40 is formed in a crescent shape or a half moon shape in a sectional view in the width direction of the diaper 1, the fusion part in the conventional side seal part Thus, the ratio of the fusion | bond part 40 which exists in the corner | angular part 3S (refer FIG. 3) of the side edge part of the exterior body 3 which comprises the side seal part 4 compared with the case where it forms in the rectangular shape in the same sectional view. As a result, the flexibility and feel of the corner 3S are less likely to be impaired. Therefore, as for the diaper 1, the feeling of wear of a diaper improves compared with a conventional product. On the other hand, 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 center portion between the side portions), the side seal portion 4 has a practically sufficient fusion strength, and the side seal portion 4 is worn while the diaper 1 is worn. Inconveniences such as tearing of the seal 4 hardly occur.
　また、サイドシール部４（融着部４０）は、おむつ１の着用状態又は自然状態（収縮状態）において外部から視認し難いという特徴を有している。図３には、おむつ１の着用時にウエスト開口部８が拡げられた状態における、サイドシール部４（融着部４０）が示されている。ウエスト開口部８が拡げられた状態において、サイドシール部４は、通常は図３（ａ）に示すように、融着部４０が露出した状態となるが、サイドシール部４の外縁４ａが外装体３の内方に向かって凸の弧状をなしていること、及び融着部４０が従来のサイドシール部（融着部）に比して小さいこと等により、外部から視認し難い。特に、サイドシール部４の外縁４ａが外装体３の内方に向かって凸の弧状をなしていることにより、シート３１，３２の形成材料如何によっては、図３（ｂ）に示すように、おむつ１の着用時にウエスト開口部８が拡げられた状態においては、腹側部１Ａ側の外装体３の側縁部の角部３Ｓと背側部１Ｂ側の外装体３の側縁部の角部３Ｓとが接近し、両角部３Ｓ，３Ｓ間の離間距離が縮まる場合がある。そのため、両角部３Ｓ，３Ｓ間に位置する融着部４０は、該融着部４０よりもおむつ１の外方側に位置する、互いに近接した両角部３Ｓ，３Ｓによって、手で触れ難く且つ外部から視認し難い状態となり、それによって、おむつ１の着用感のみならず外観も向上する。 Moreover, the side seal part 4 (fusion | fusion part 40) has the characteristic that it is hard to visually recognize from the outside in the wearing state or natural state (contraction state) of the diaper 1. FIG. 3 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 portion 8 is expanded, the side seal portion 4 is normally in a state where the fused portion 40 is exposed as shown in FIG. 3A, 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). In particular, the outer edge 4a of the side seal portion 4 has a convex arc shape toward the inner side of the exterior body 3, so that depending on the forming material of the sheets 31, 32, as shown in FIG. In a state where the waist opening 8 is expanded when the diaper 1 is worn, 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.
　尚、おむつ１の着用状態又は自然状態（収縮状態）においてサイドシール部４（融着部４０）が外部から視認し難い状態となると、例えばおむつ１の使用後に、着用者である乳幼児からその保護者（例えば母親）がおむつを取り外す際にサイドシール部４を見つけ難く、おむつ１の取り外し作業に手間取るおそれがある。このような、サイドシール部４の視認性の低下に起因する不都合を解消する手段としては、例えば、サイドシール部４を横断するおむつ１の構成部材の色を、サイドシール部４よりも腹側（前側）と背側（後側）とで異ならせる方法が挙げられる。より具体的には例えば、おむつ１の腹側部１Ａ（前見頃）と背側部１Ｂ（後見頃）とで、ウエスト部弾性部材５又は外装体３（外層シート３１、内層シート３２）の色を異ならせる方法が挙げられる。斯かる方法により、色の切り替え部分にサイドシール部４が位置するようになるため、サイドシール部４の目視による視認性が高まり、前記不都合の発生が効果的に防止される。 In addition, when 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. As a means for eliminating such inconvenience due to the decrease in the visibility of the side seal portion 4, for example, 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. More specifically, for example, 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. By such a method, 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.
　続いて、本発明の製造装置の好ましい実施形態であるレーザー式接合装置２０及び本実施態様の製造方法について、図４～図７に基づいて詳述する。
　レーザー式接合装置２０（複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置）は、レーザー光３０を集光するレンズ３５１を有する照射ヘッド３５と、少なくとも一部に樹脂材を含む複数枚のシートが重ねられた帯状のシート積層体（おむつ連続体１０）の一方の面を支持しながら搬送する支持部材２１と、該帯状のシート積層体（おむつ連続体１０）の他方の面側から該支持部材２１に該帯状のシート積層体を当接させ加圧状態にする押さえ部材（加圧ベルト２４）とを具備している。レーザー式接合装置２０は、あらかじめ別途製造されたおむつ連続体１０（帯状のシート積層体）に対して、図４に示すように、レーザー光を照射して、一対のサイドシール部４，４（シール縁部）を有する外装体３（シート融着体）を具備するパンツ型使い捨ておむつ１（シート融着体）を連続的に製造する装置である。 Next, the laser bonding apparatus 20 as a preferred embodiment of the manufacturing apparatus of the present invention and the manufacturing method of this embodiment will be described in detail with reference to FIGS.
The laser-type bonding apparatus 20 (manufacturing apparatus for a sheet fusion body having a seal edge portion fused with the edges of a plurality of sheets overlapped) has an irradiation head 35 having a lens 351 for condensing the laser beam 30. A support member 21 that conveys while supporting one surface of a strip-shaped sheet laminate (diaper continuous body 10) in which a plurality of sheets including a resin material at least partially are stacked, and the strip-shaped sheet laminate A pressing member (pressurizing belt 24) is provided in which the belt-shaped sheet laminate is brought into contact with the support member 21 from the other surface side of the (diaper continuous body 10) to be in a pressurized state. As shown in FIG. 4, the laser-type bonding apparatus 20 irradiates a continuous diaper 10 (a belt-shaped sheet laminate) separately produced in advance with a laser beam to form a pair of side seal parts 4, 4 ( It is an apparatus for continuously producing a pants-type disposable diaper 1 (sheet fused body) having an exterior body 3 (sheet fused body) having a seal edge).
　本実施形態のレーザー式接合装置２０は、図４に示すように、回転軸周り（矢印Ａ方向）に回転する環状の支持部材２１を備えた中空の円筒ロール２３と、中空の円筒ロール２３（支持部材２１）の中空部に配され、該円筒ロール２３の周面部を形成する支持部材２１に向けてレーザー光３０を照射する照射ヘッド３５と、無端状の加圧ベルト２４（押さえ部材）を備えたベルト式加圧装置２６とを備えている。レーザー式接合装置２０は、環状の支持部材２１の外周面に帯状のおむつ連続体１０（シート積層体）が巻き掛けられて搬送される装置である。レーザー式接合装置２０は、支持部材２１の外周面（円筒ロール２３の周面部）に巻き掛ける加圧ベルト２４の張力を増減調整できる張力調整機構（図示せず）を備え、該張力の調整により、支持部材２１と加圧ベルト２４とによって、おむつ連続体１０（シート積層体）に加える圧力を適宜調整することができる。本実施形態において、照射ヘッド３５は、図４に示すように、環状の支持部材２１の回転軸中心からずれて、具体的には、該回転軸中心から下方にずれて配されている。 As shown in FIG. 4, the laser-type bonding apparatus 20 according to this embodiment includes a hollow cylindrical roll 23 including an annular support member 21 that rotates around a rotation axis (in the direction of arrow A), and a hollow cylindrical roll 23 ( An irradiation head 35 which is arranged in a hollow portion of the support member 21) and irradiates the laser beam 30 toward the support member 21 forming the peripheral surface portion of the cylindrical roll 23, and an endless pressure belt 24 (pressing member). And a belt type pressure device 26 provided. The laser-type bonding apparatus 20 is an apparatus in which a belt-like diaper continuous body 10 (sheet laminated body) is wound around the outer peripheral surface of an annular support member 21 and conveyed. The laser-type 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 support member 21 (the peripheral surface portion of the cylindrical roll 23). The pressure applied to the diaper continuous body 10 (sheet laminated body) can be appropriately adjusted by the support member 21 and the pressure belt 24. In the present embodiment, as shown in FIG. 4, the irradiation head 35 is arranged so as to deviate from the rotation axis center of the annular support member 21, specifically, to deviate downward from the rotation axis center.
　本実施形態の照射ヘッド３５は、図４に示すように、レーザー光３０を自在に走査するガルバノスキャナであり、詳述すると、照射されたレーザー光３０を反射し該レーザー光３０を自在に走査するミラー３５２及び該ミラー３５２により反射されたレーザー光３０を集光するレンズ３５１を有している。ミラー３５２は、モータ軸に取り付けられている。本実施形態の照射ヘッド３５のミラー３５２は、レーザー光３０を、後述する円筒ロール２３の回転軸と平行な方向（図４中符号Ｘで示す方向）に進退させる機構、レーザー光３０が支持部材２１上のおむつ連続体１０に当たる位置（照射点：後述する焦点ｆ）を円筒ロール２３の周方向に移動させる機構を備え、レーザー光３０を自在に走査する。本実施形態の照射ヘッド３５のレンズ３５１は、レーザー光３０を集光して、円筒ロール２３の周面上でレーザー光３０のスポット（照射点、焦点ｆ）径を一定にする機構等を備えている。本実施形態の照射ヘッド３５は、ミラー３５２及びレンズ３５１を有することによって、レーザー光３０の照射点（焦点ｆ）を、円筒ロール２３の周方向及び該周方向と直交する方向（図４中符号Ｘで示す方向。円筒ロール２３の回転軸と平行な方向。）の両方向に任意に移動させることができる。 As shown in FIG. 4, the irradiation head 35 of the present embodiment is a galvano scanner that freely scans the laser beam 30. More specifically, the irradiation head 35 reflects the irradiated laser beam 30 and freely scans the laser beam 30. And a lens 351 for condensing the laser beam 30 reflected by the mirror 352. The mirror 352 is attached to the motor shaft. The mirror 352 of the irradiation head 35 according to the present embodiment has a mechanism for moving the laser beam 30 forward and backward in a direction parallel to a rotation axis of a cylindrical roll 23 to be described later (a direction indicated by a symbol X in FIG. 4). A mechanism for moving a position (irradiation point: focal point f described later) on the diaper continuum 10 on 21 in the circumferential direction of the cylindrical roll 23 is provided, and the laser beam 30 is freely scanned. The lens 351 of the irradiation head 35 of the present embodiment includes a mechanism for condensing the laser light 30 and making the spot (irradiation point, focal point f) diameter of the laser light 30 constant on the peripheral surface of the cylindrical roll 23. ing. The irradiation head 35 of the present embodiment includes the mirror 352 and the lens 351, so that the irradiation point (focal point f) of the laser light 30 is set in the circumferential direction of the cylindrical roll 23 and the direction orthogonal to the circumferential direction (reference numeral in FIG. 4). The direction indicated by X. The direction parallel to the rotational axis of the cylindrical roll 23) can be arbitrarily moved.
　本実施形態のベルト式加圧装置２６は、図４に示すように、無端状の加圧ベルト２４（押さえ部材）及び該加圧ベルト２４が架け渡された状態で回転する３本のロール２５ａ，２５ｂ，２５ｃを備えている。ロール２５ａ，２５ｂ，２５ｃは駆動ロールでも良く、加圧ベルト２４に連れ回りする従動ロールでも良い。加圧ベルト２４は、ロール２５ａ，２５ｂ，２５ｃの何れか１以上を駆動ロールとして、又は円筒ロール２３と連れ回りして、円筒ロール２３（支持部材２１）と同速度で移動する。支持部材２１及び加圧ベルト２４は、空冷、水冷等により温度を所定の温度範囲に維持することが好ましい。 As shown in FIG. 4, the belt-type pressure device 26 of the present embodiment includes an endless pressure belt 24 (pressing member) and three rolls 25 a that rotate in a state where the pressure belt 24 is stretched. , 25b, 25c. 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.
　加圧ベルト２４（押さえ部材）としては、加工時に発生する熱に耐えうる耐熱性を有する金属又は樹脂製のベルトを用いることができる。また、加圧ベルト２４としては、通常、被加工物（おむつ連続体１０）に対して照射されるレーザー光の透過性を有しないものが用いられるが、該透過性を有するものを用いることもできる。 As the pressure belt 24 (pressing member), a metal or resin belt having heat resistance capable of withstanding the heat generated during processing can be used. In addition, as the pressure belt 24, a belt that does not have the transparency of the laser beam irradiated on the workpiece (diaper continuous body 10) is usually used, but a belt having the transparency may be used. it can.
　支持部材２１は、集光されたレーザー光３０が該支持部材２１側から通過可能な、おむつ連続体１０（シート積層体）の幅方向（図４中符号Ｘで示す方向）に長いスリット状の開口部２７を有している。具体的に、本実施形態の支持部材２１は、図４に示すように、円筒ロール２３の周面部（被加工物との当接部）を形成しており、円筒ロール２３の左右両側縁部を形成する一対の環状の枠体２２，２２間に挟持固定されている。本実施形態においては、支持部材２１は、環状の枠体２２の周長と同じ長さの単一の環状部材から構成されている。 The support member 21 has a slit-like shape that is long in the width direction (direction indicated by X in FIG. 4) of the diaper continuous body 10 (sheet laminate) through which the condensed laser light 30 can pass from the support member 21 side. An opening 27 is provided. Specifically, as shown in FIG. 4, the support member 21 of the present embodiment forms a peripheral surface portion (contact portion with a workpiece) of the cylindrical roll 23, and left and right side edges of the cylindrical roll 23. Are sandwiched and fixed between a pair of annular frames 22 and 22. In the present embodiment, the support member 21 is composed of a single annular member having the same length as the circumferential length of the annular frame 22.
　支持部材２１は、レーザー光が通過可能な光通過部を有している。本実施形態における支持部材２１は、図４、図５及び図６に示すように、光通過部として、該支持部材２１を厚み方向に貫通する、おむつ連続体１０（シート積層体）の幅方向（図４中符号Ｘで示す方向）に長いスリット状の開口部２７を有している。尚、図５（図５（ｂ））では、説明容易の観点から、支持部材２１及び加圧ベルト２４（押さえ部材）並びにこれらに挟まれたおむつ連続体１０（シート積層体）が、図５中左側から右側に向かって水平移動しているかのように記載しているが、実際にはこれら各部材は、円筒ロール２３の円筒状に対応した湾曲状態で回転移動している。開口部２７は、平面視して矩形形状を有し、その長手方向を支持部材２１の幅方向（図５（ａ）中符号Ｘで示す方向。円筒ロール２３の回転軸と平行な方向。）に一致させて、円筒状の支持部材２１の周方向に所定間隔を置いて複数形成されている。支持部材２１は、開口部２７ではレーザー光を通過させる一方、開口部２７以外の部分ではレーザー光を通過（透過）させない。支持部材２１に開口部２７を形成する方法としては、１）支持部材２１の所定箇所にエッチング、パンチング、レーザー加工等により開口部２７を穿設する方法の他、２）支持部材２１として、単一の環状部材に代えて、湾曲した円弧状の部材を複数用い、それら複数の部材を、一対の枠体２２，２２間に、該枠体２２の周方向に所定間隔を置いて配置する方法が挙げられる。前記２）の方法では、隣接する２つの部材の間隔が、スリット状の開口部２７となる。 The support member 21 has a light passage portion through which laser light can pass. As shown in FIGS. 4, 5, and 6, the support member 21 in the present embodiment serves as a light passing portion, and the width direction of the diaper continuous body 10 (sheet laminate) that penetrates the support member 21 in the thickness direction. A long slit-like opening 27 is provided in the direction indicated by the symbol X in FIG. In FIG. 5 (FIG. 5B), from the viewpoint of easy explanation, 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 described as if moving horizontally from the middle left side to the right side, these members actually rotate and move in a curved state corresponding to the cylindrical shape of the cylindrical roll 23. The opening 27 has a rectangular shape in plan view, and its longitudinal direction is the width direction of the support member 21 (the direction indicated by the symbol X in FIG. 5A. The direction parallel to 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 method of forming the opening 27 in the support member 21 includes 1) a method of drilling the opening 27 in a predetermined portion of the support member 21 by etching, punching, laser processing, or the like. A method of using a plurality of curved arc-shaped members in place of one annular member, and arranging the plurality of members between the pair of frame bodies 22 and 22 at a predetermined interval in the circumferential direction of the frame body 22 Is mentioned. In the method 2) described above, the interval between two adjacent members forms a slit-shaped opening 27.
　尚、レーザー式接合装置２０（複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置）においては、レーザー光が通過可能な光通過部が、支持部材２１を厚み方向に貫通する（スリット状の）開口部２７からなるため、おむつ連続体１０（シート積層体）における開口部２７と重なる部分（図５及び図６中符号１０Ｃで示す分断予定部分）は、加圧ベルト２４が当接するだけで、支持部材２１と加圧ベルト２４（押さえ部材）とで挟まれない。従って厳密に言えば、分断予定部分１０Ｃには、両部材２１，２４で挟持されることにより発生する加圧力は発生しない。しかし、開口部２７と重なる分断予定部分１０Ｃは、それ自体は両部材２１，２４で挟持されなくとも、その近傍、即ち、おむつ連続体１０における開口部２７の近傍（開口縁部）と重なる部分は両部材２１，２４で挟持されるため、レーザー光の照射前後で動かず、従って、レーザー光の照射によるおむつ連続体１０の分断によって生じた切断縁部は動かない。つまり、おむつ連続体１０の分断予定部分１０Ｃ（シート積層体における開口部２７と重なる部分）は、両部材２１，２４での挟持による加圧力により拘束された部分であり、該加圧力が事実上影響する部分である。 In the laser type bonding apparatus 20 (manufacturing apparatus for a sheet fusion body having a seal edge portion fused in a state where the edges of a plurality of sheets are overlapped), a light passage portion through which laser light can pass is provided. Since it consists of the opening part 27 (slit shape) which penetrates the supporting member 21 in the thickness direction, the part which overlaps with the opening part 27 in the diaper continuous body 10 (sheet laminated body) (the division | segmentation plan shown by the code | symbol 10C in FIG.5 and FIG.6) The portion) is merely sandwiched by the pressure belt 24 and is not sandwiched between the support member 21 and the pressure belt 24 (pressing member). Strictly speaking, therefore, the pressing force generated by being sandwiched between the members 21 and 24 is not generated in the parting portion 10C. However, the parting portion 10C that overlaps with the opening 27 itself is not sandwiched between the members 21 and 24, but the vicinity thereof, that is, the portion that overlaps with the vicinity of the opening 27 (opening edge) in the diaper continuous body 10. Is sandwiched between the two members 21 and 24, and therefore does not move before and after the irradiation of the laser beam, and therefore, the cutting edge portion generated by the division of the diaper continuous body 10 by the irradiation of the laser beam does not move. That is, the parting planned portion 10C of the diaper continuous body 10 (portion overlapping the opening 27 in the sheet laminate) is a portion restrained by the pressing force between the members 21 and 24, and the pressing force is practically the same. It is an affected part.
　支持部材２１の開口部２７を円筒ロール２３の周方向に断面視（図６参照）して、スリット状の開口部２７を形成する支持部材２１の両端部２１ｅ，２１ｅには、それぞれ、互いの間隔が押さえ部材（加圧ベルト２４）側よりも照射ヘッド３５側の方が広がるテーパー２１１が設けられている。本実施形態においては、図６に示すように断面視して、支持部材２１の両端部２１ｅ，２１ｅのテーパー２１１は、互いの間隔が押さえ部材（加圧ベルト２４）側から照射ヘッド３５側に向かって漸次広がるように形成されている。 The opening 27 of the support member 21 is viewed in cross section in the circumferential direction of the cylindrical roll 23 (see FIG. 6), and both end portions 21e and 21e of the support member 21 forming the slit-like opening 27 are respectively connected to each other. A taper 211 is provided in which the interval is wider on the irradiation head 35 side than on the pressing member (pressure belt 24) side. In this embodiment, as shown in FIG. 6, the taper 211 of the both end portions 21 e and 21 e of the support member 21 is spaced from the pressing member (pressure belt 24) side to the irradiation head 35 side when viewed in cross section. It is formed so as to gradually widen toward it.
　そして、図６に示すように、支持部材２１の各端部２１ｅのテーパー角度（θ）、搬送されている帯状のおむつ連続体１０（シート積層体）に照射されるレーザー光３０の焦点ｆでの垂線ＰＬ（焦点ｆと円筒ロール２３の回転中心を結ぶ線）と該焦点ｆ及び照射ヘッド３５のレンズ３５１の中心を結ぶ仮想線ＩＬとのなす照射角度の最大値（θ１）、並びに照射ヘッド３５のレンズ３５１により集光されるレーザー光３０の集光角度（θ２）の関係が、下記式（１）を満たしていることが好ましい。
 
　　θ＞θ１＋θ２／２・・・（１）
 
　ここで、照射角度の最大値（θ１）とは、搬送されている対象物であるおむつ連続体１０（シート積層体）に対し、照射ヘッド３５のミラー３５２によって、照射されたレーザー光３０を反射して該レーザー光３０を走査し、Ｘ方向に長いスリット状の開口部２７に沿ってレーザー光３０を照射している過程、具体的には、上流側においておむつ連続体１０（シート積層体）に対し開口部２７に沿ってレーザー光３０を照射する図６（ａ）に示す位置から、おむつ連続体１０（シート積層体）に対しレーザー光３０が垂直に照射する図６（ｂ）に示す位置（垂線ＰＬと仮想線ＩＬが重なる位置）を経て、下流側においておむつ連続体１０（シート積層体）に対し開口部２７に沿ってレーザー光３０を照射する図６（ｃ）に示す位置を通過することを含む過程において、レーザー光３０の焦点ｆでの垂線ＰＬに対して仮想線ＩＬが最も傾斜したときの角度を意味する。尚、本実施形態においては、図６（ａ）に示す位置から図６（ｂ）に示す位置を経て図６（ｃ）に示す位置を通過することを含む過程において、１往路（１パス）のみ、支持部材２１側からスリット状の開口部２７に沿って、レーザー光３０を照射ヘッド３５から照射している。 Then, as shown in FIG. 6, the taper angle (θ) of each end 21e of the support member 21 and the focal point f of the laser light 30 irradiated to the belt-like diaper continuous body 10 (sheet laminated body) being conveyed. Of the vertical angle PL (line connecting the focal point f and the rotation center of the cylindrical roll 23) and the imaginary line IL connecting the focal point f and the center of the lens 351 of the irradiation head 35, and the irradiation head The relationship of the condensing angle (θ2) of the laser light 30 condensed by the 35 lenses 351 preferably satisfies the following formula (1).

θ> θ1 + θ2 / 2 (1)

Here, the maximum value (θ1) of the irradiation angle reflects the irradiated laser beam 30 by the mirror 352 of the irradiation head 35 with respect to the diaper continuous body 10 (sheet laminated body) that is the object being conveyed. Then, the process of scanning the laser beam 30 and irradiating the laser beam 30 along the slit-shaped opening 27 long in the X direction, specifically, the diaper continuum 10 (sheet laminate) on the upstream side On the other hand, the laser beam 30 is irradiated perpendicularly to the diaper continuous body 10 (sheet laminated body) from the position shown in FIG. 6A where the laser beam 30 is irradiated along the opening 27. The position shown in FIG. 6C where the laser beam 30 is irradiated along the opening 27 to the diaper continuous body 10 (sheet laminated body) on the downstream side through the position (position where the perpendicular line PL and the virtual line IL overlap). pass In processes including bets, which means an angle at which the imaginary line IL is the most inclined relative to the perpendicular line PL at the focus f of the laser beam 30. In this embodiment, in the process including passing the position shown in FIG. 6C from the position shown in FIG. 6A through the position shown in FIG. 6B, one forward path (one pass). Only the laser beam 30 is irradiated from the irradiation head 35 along the slit-shaped opening 27 from the support member 21 side.
　また、支持部材２１の各端部２１ｅのテーパー角度（θ）とは、本実施形態のレーザー式接合装置２０のように、押さえ部材（加圧ベルト２４）側から照射ヘッド３５側に向かって漸次広がるように、テーパー２１１が一定の角度で形成されている場合は、その角度を意味する。しかし、支持部材２１の各端部２１ｅのテーパー２１１が、一定の角度で形成されていない場合は、図７に示すように、レーザー光３０の焦点ｆからテーパー２１１に向かって接線ＴＬを描いた際に、最も焦点ｆ寄りの接点での接線ＴＬと焦点ｆでの垂線ＰＬとのなす角を、支持部材２１の各端部２１ｅのテーパー角度（θ）とする。 Further, the taper angle (θ) of each end portion 21e of the support member 21 is gradually increased from the pressing member (pressure belt 24) side to the irradiation head 35 side as in the laser type bonding apparatus 20 of the present embodiment. When the taper 211 is formed at a constant angle so as to spread, this means the angle. However, when the taper 211 of each end 21e of the support member 21 is not formed at a constant angle, a tangent line TL is drawn from the focal point f of the laser beam 30 toward the taper 211 as shown in FIG. At this time, an angle formed between the tangent TL at the contact closest to the focal point f and the perpendicular PL at the focal point f is defined as a taper angle (θ) of each end 21e of the support member 21.
　具体的に、垂線ＰＬと仮想線ＩＬとのなす照射角度の最大値（θ１）は、０°以上～４５°以下であることが好ましく、０°以上～４０°以下であることが更に好ましい。
　また、レーザー光３０の集光角度（θ２）は、０°以上～３０°以下であることが好ましく、０．１°以上～２０°以下であることが更に好ましい。
　そして、支持部材２１の各端部２１ｅのテーパー角度（θ）は、レーザー光のエネルギーロスを抑える観点から、０°より大きいことが好ましく、５°以上であることが更に好ましい。テーパー角度（θ）の上限値は、支持部材２１に必要な強度を得るために支持部材２１の材料により限定され、８５°程度である。 Specifically, the maximum value (θ1) of the irradiation angle formed between the perpendicular line PL and the imaginary line IL is preferably 0 ° to 45 °, and more preferably 0 ° to 40 °.
The condensing angle (θ2) of the laser beam 30 is preferably 0 ° or more and 30 ° or less, and more preferably 0.1 ° or more and 20 ° or less.
The taper angle (θ) of each end 21e of the support member 21 is preferably larger than 0 °, more preferably 5 ° or more, from the viewpoint of suppressing the energy loss of the laser beam. The upper limit value of the taper angle (θ) is limited by the material of the support member 21 in order to obtain the strength required for the support member 21, and is about 85 °.
　また、サイドシール部４（シール縁部）に実用上十分な融着強度を付与する観点、及びシート融着体を製造するために必要な加工エネルギーを低減させる観点から、レーザー光３０が照射されるスリット状の開口部２７の幅Ｗ（図６（ｂ）参照。開口部２７の、円筒ロール２３の周方向に沿った長さ。）に対する、おむつ連続体１０（帯状のシート積層体）におけるレーザー光３０のスポット（レーザー光３０が照射されている部分、照射点、焦点ｆ）の直径φの比（φ／Ｗ）は、好ましくは０．０５以上、更に好ましくは０．１以上、特に好ましくは０．４以上、そして、好ましくは８以下、更に好ましくは７以下、特に好ましくは２以下、より具体的には、好ましくは０．０５～８、更に好ましくは０．１～７、特に好ましくは０．４～２である。例えば、スリット状の開口部２７の幅Ｗは０．１～４．０ｍｍである。 Further, the laser beam 30 is irradiated from the viewpoint of imparting practically sufficient fusion strength to the side seal portion 4 (seal edge portion) and reducing the processing energy necessary for manufacturing the sheet fusion product. In the diaper continuous body 10 (band-shaped sheet laminate) with respect to the width W of the slit-shaped opening 27 (see FIG. 6B, the length of the opening 27 along the circumferential direction of the cylindrical roll 23). The ratio (φ / W) of the diameter φ of the spot of the laser beam 30 (the portion irradiated with the laser beam 30, the irradiation point, the focal point f) is preferably 0.05 or more, more preferably 0.1 or more, particularly Preferably 0.4 or more, and preferably 8 or less, more preferably 7 or less, particularly preferably 2 or less, more specifically preferably 0.05 to 8, more preferably 0.1 to 7, particularly Preferably 0.4 ~ 2. For example, the width W of the slit-shaped opening 27 is 0.1 to 4.0 mm.
　また、レーザー式接合装置２０には、図４、図５及び図６に示すように、スリット状の開口部２７に、押さえ部材（加圧ベルト２４）側とは反対側に凸の、言い換えれば、環状の支持部材２１を備えた円筒ロール２３の中心に向かって凸のシリンドリカルレンズ５０が、搬送方向と直交する方向（おむつ連続体１０（シート積層体）の幅方向、図４中符号Ｘで示す方向）に延在して配されている。シリンドリカルレンズ５０により、開口部２７に向かって照射されたレーザー光３０を、開口部２７の搬送方向中心に屈折させるようにして帯状のおむつ連続体１０（シート積層体）に入射させることができるようになる。シリンドリカルレンズ５０は、半円柱状のレンズであり、ミラー３５２で反射されたレーザー光３０が、シリンドリカルレンズ５０で平行光に変換される。レーザー式接合装置２０では、このようなシリンドリカルレンズ５０が、円筒状の支持部材２１の周方向に所定間隔を置いて複数形成された開口部２７毎に配されている。尚、シリンドリカルレンズ５０は、レーザー式接合装置２０では、図４、図５及び図６に示すように、開口部２７の近傍の支持部材２１に接した状態で配されているが、支持部材２１から離れた位置に配されていてもよい。 Further, as shown in FIGS. 4, 5, and 6, the laser-type bonding device 20 has a slit-shaped opening 27 that is convex on the side opposite to the pressing member (pressure belt 24) side, in other words. The cylindrical lens 50 convex toward the center of the cylindrical roll 23 provided with the annular support member 21 is perpendicular to the conveying direction (in the width direction of the diaper continuous body 10 (sheet laminated body), denoted by X in FIG. 4). Extending in the direction shown). The laser light 30 emitted toward the opening 27 by the cylindrical lens 50 can be incident on the continuous diaper 10 (sheet laminate) so as to be refracted toward the center of the opening 27 in the conveyance direction. become. The cylindrical lens 50 is a semi-cylindrical lens, and the laser light 30 reflected by the mirror 352 is converted into parallel light by the cylindrical lens 50. In the laser-type bonding apparatus 20, such a cylindrical lens 50 is arranged for each of the plurality of openings 27 formed at predetermined intervals in the circumferential direction of the cylindrical support member 21. The cylindrical lens 50 is arranged in the laser bonding apparatus 20 in contact with the support member 21 in the vicinity of the opening 27 as shown in FIGS. 4, 5, and 6. It may be arranged at a position distant from.
　また、支持部材２１は、図５（ｂ）に示すように、その外面（被加工物との当接面）に凹部２８を有している。凹部２８は、円筒状の支持部材２１の周方向に所定間隔を置いて複数形成されており、隣接する２つの凹部２８，２８間に位置する領域（凸部）に、スリット状の開口部２７が形成されている。開口部２７は、前記凸部における円筒状の支持部材２１の周方向の中央に形成されている。 Further, as shown in FIG. 5 (b), 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.
　このように、支持部材２１の外面に凹部２８が形成されていることにより、おむつ連続体１０（帯状のシート積層体）の厚みが均一でない場合は、該おむつ連続体１０における相対的に厚みの大きい部分（例えば吸収性本体２の配置領域）が凹部２８内に収まるように、該おむつ連続体１０を支持部材２１の外面上に導入することが可能となる。そして、おむつ連続体１０をそのように支持部材２１上に導入すると、図５（ｂ）に示すように、おむつ連続体１０における加圧ベルト２４（押さえ部材）との当接面（他方の面１０ｂ）が略平坦となるため、加圧ベルト２４をおむつ連続体１０に押し付けたときに、おむつ連続体１０における、開口部２７が形成された前記凸部上に位置する部分（図５中符号１０Ｃで示す分断予定部分及びその近傍）全体が、おむつ連続体１０の支持部材２１への所定のテンションでの巻きかけと加圧ベルト２４とによって、所定の圧力でその厚み方向に均一に加圧されるようになり、こうしてレーザー光３０の照射による分断前から厚み方向に加圧された該部分に、レーザー光３０を照射して該部分を分断したときに、その分断された該部分を構成する複数枚のシートの切断縁部どうしをより確実に融着させることが可能となり、サイドシール部４（シール縁部）の融着強度の一層の向上が図られる。 Thus, when the thickness of the diaper continuous body 10 (band-shaped sheet laminated body) is not uniform by forming the recess 28 on the outer surface of the support member 21, 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. When 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. Therefore, 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 opening 27 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. Thus, when the portion that has been pressed in the thickness direction from before being divided by the irradiation of the laser beam 30 is irradiated with the laser beam 30 to divide the portion, 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 (sealing edge) is achieved.
　尚、支持部材２１及び押さえ部材２４の構成材料としては、おむつ連続体１０（帯状のシート積層体）の切断縁部を強制的に冷却し、融着部の形成を促進する観点から、熱伝導性の高い材料、具体的には、鉄、アルミニウム、ステンレス鋼、銅等の金属材料やセラミックス等が挙げられる。 In addition, as a constituent material of the support member 21 and the pressing member 24, heat conduction is performed 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. Examples of such materials include metal materials such as iron, aluminum, stainless steel, and copper, and ceramics.
　以上のように構成されたレーザー式接合装置２０は、押さえ部材（加圧ベルト２４）による加圧状態の帯状のおむつ連続体１０（シート積層体）に、支持部材２１側から集光されたレーザー光３０をスリット状の開口部２７に沿って照射して分断すると共に、この分断の縁部を重なった状態で融着し、シール縁部を有するシート融着体（一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１）を複数個連続的に製造することができる。また、本実施形態のレーザー式接合装置２０は、環状の支持部材２１を有しているので、更に効率的にシール縁部を有するシート融着体（一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１）を連続的に製造することができる。 The laser-type joining device 20 configured as described above is a laser focused from the support member 21 side on the continuous diaper body 10 (sheet laminate) in a state of pressure by a pressing member (pressure belt 24). The light 30 is irradiated along the slit-shaped opening 27 to divide the sheet, and the sheet is bonded in a state where the divided edges overlap with each other, and has a seal edge (a pair of side seal portions 4, 4). A plurality of pants-type disposable diapers 1) having an exterior body 3 having 4 can be manufactured continuously. In addition, since the laser-type bonding apparatus 20 of the present embodiment includes the annular support member 21, the sheet fusion body having a seal edge portion (an outer package having a pair of side seal portions 4 and 4) is more efficiently provided. A pants-type disposable diaper 1) having a body 3 can be continuously produced.
　また、レーザー式接合装置２０は、支持部材２１の両端部２１ｅ，２１ｅそれぞれに、テーパー２１１が設けられているので、照射されるレーザー光３０が、図６（ａ）に示す位置から図６（ｂ）に示す位置を経て図６（ｃ）に示す位置を通過することを含む過程において、支持部材２１の両端部２１ｅ，２１ｅに当たり難くなっており、シール縁部を有するシート融着体（一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１）を製造する際に、レーザー光のエネルギーロスを抑えることができる。特に、本実施形態においては、図６に示すように断面視して、支持部材２１の両端部２１ｅ，２１ｅのテーパー２１１が、押さえ部材（加圧ベルト２４）側から照射ヘッド３５側に向かって漸次広がるように形成されているので、更に照射されるレーザー光３０が支持部材２１の両端部２１ｅ，２１ｅに当たり難くなっており、レーザー光のエネルギーロスを更に抑えることができる。このような効果は、本実施形態のレーザー式接合装置２０の照射ヘッド３５の配置位置が、環状の支持部材２１の回転軸中心である場合のみならず、図４に示すように、環状の支持部材２１の回転軸中心からずれて配されている装置の場合に特に奏される効果である。 Moreover, since the laser type | mold joining apparatus 20 is provided with the taper 211 in each of the both ends 21e and 21e of the support member 21, the irradiated laser beam 30 is the position shown in FIG. In the process including passing the position shown in FIG. 6C through the position shown in FIG. 6B, it is difficult to hit the both end portions 21e and 21e of the support member 21, and the sheet fusion body (a pair of seal edges) is provided. When manufacturing the underpants-type disposable diaper 1) having the exterior body 3 having the side seal portions 4 and 4, the energy loss of the laser beam can be suppressed. In particular, in this embodiment, as shown in FIG. 6, the taper 211 of both end portions 21 e and 21 e of the support member 21 is directed from the pressing member (pressure belt 24) side to the irradiation head 35 side in a cross-sectional view. Since it is formed so as to gradually spread, it is difficult for the irradiated laser beam 30 to hit both end portions 21e and 21e of the support member 21, and the energy loss of the laser beam can be further suppressed. Such an effect is not only when the position of the irradiation head 35 of the laser type bonding apparatus 20 of the present embodiment is the center of the rotation axis of the annular support member 21 but also as shown in FIG. This is an effect particularly exhibited in the case of a device that is arranged with a deviation from the center of rotation of the member 21.
　続いて、本発明の複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法の一実施態様を、上述した実施形態のレーザー式接合装置２０を用いて説明する。
　本実施態様の製造方法は、複数枚のシートが重ねられた帯状のシート積層体（おむつ連続体１０）の一方の面１０ａを、集光されたレーザー光３０が通過可能な、シート積層体（おむつ連続体１０）の幅方向（Ｘ方向）に長いスリット状の開口部２７を有する支持部材２１に当接させて加圧状態となりながら搬送される該帯状のシート積層体（おむつ連続体１０）に対して、該支持部材２１側からスリット状の開口部２７に沿って、シート積層体（おむつ連続体１０）を構成するシートに吸収され該シートを発熱させる発振波長のレーザー光３０を照射ヘッド３５から照射することにより、帯状のシート積層体（おむつ連続体１０）を分断するのと同時に、その分断によって生じた加圧状態にある複数枚のシートの切断縁部どうしを融着させてシール縁部（サイドシール部４，４）を形成するシール縁部形成工程を有している。以下、具体的に説明する。 Subsequently, an embodiment of a method for producing a sheet fusion body having a seal edge portion fused in a state where the edges of a plurality of sheets of the present invention overlap each other is referred to as the laser-type bonding apparatus 20 of the above-described embodiment. It explains using.
The manufacturing method of the present embodiment is a sheet laminate in which the condensed laser beam 30 can pass through one surface 10a of a belt-like sheet laminate (diaper continuous body 10) in which a plurality of sheets are stacked. The belt-like sheet laminate (diaper continuum 10) conveyed while being pressed against a support member 21 having a slit-like opening 27 that is long in the width direction (X direction) of the diaper continuum 10). On the other hand, the irradiation head emits laser light 30 having an oscillation wavelength that is absorbed by the sheet constituting the sheet laminate (diaper continuous body 10) along the slit-shaped opening 27 from the support member 21 side and heats the sheet. By irradiating from 35, the strip-shaped sheet laminate (diaper continuous body 10) is divided, and at the same time, the cut edges of a plurality of sheets in a pressurized state generated by the division are fused. Has the sealing edge of the sealing edge forming a (side sealing portions 4, 4). This will be specifically described below.
　本実施態様の製造方法においては、「複数枚のシートが重ねられた帯状のシート積層体」として、複数の枚葉のシート積層体（サイドシール部４が形成されていないパンツ型使い捨ておむつの前駆体）が一方向に連なってなる、おむつ連続体１０を別途製造し、このおむつ連続体１０を、図４に示すように、レーザー光３０の照射により、個々に分断するのと同時に、その分断によって生じた加圧状態にある複数枚のシートの切断縁部どうしを融着して、サイドシール部４，４（シール縁部）を形成する。 In the manufacturing method of the present embodiment, as a “band-shaped sheet laminate in which a plurality of sheets are stacked”, a plurality of sheet laminates (precursor of a pants-type disposable diaper in which the side seal portion 4 is not formed) The diaper continuous body 10 in which the body) is continuous in one direction is separately manufactured, and the diaper continuous body 10 is individually divided by irradiation with the laser beam 30 as shown in FIG. The cut edges of the plurality of sheets in a pressurized state generated by the above are fused together to form the side seal parts 4 and 4 (seal edges).
　前記「複数枚のシートが重ねられた帯状のシート積層体」において、複数枚のシートの少なくとも一部のシートは、樹脂材を含み、該樹脂材を主成分として形成されていることが好ましく、具体的には例えば、樹脂材としてポリエチレン、ポリエチレンテレフタレート、ポリプロピレン等の熱融着性の合成樹脂を含み、不織布、フィルム、不織布とフィルムとのラミネートシート等からなることが好ましい。不織布としては、当該技術分野において通常用いられているものを特に制限無く用いることができ、具体的には、エアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布等が挙げられる。前記シート積層体は、該シート積層体を構成する複数枚のシートの全てが、樹脂材を含むことが好ましい。以下、先ず、おむつ連続体１０（帯状のシート積層体）の製造方法について、図８を参照しながら説明する。 In the “band-shaped sheet laminate in which a plurality of sheets are stacked”, it is preferable that at least a part of the plurality of sheets includes a resin material and is formed using the resin material as a main component. Specifically, for example, 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. As the nonwoven fabric, those that are usually used in the technical field can be used without particular limitation, and specific examples include an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, and a melt blown nonwoven fabric. . In the sheet laminate, it is preferable that all of a plurality of sheets constituting the sheet laminate include a resin material. Hereinafter, first, the manufacturing method of the diaper continuous body 10 (band-shaped sheet laminated body) is demonstrated, referring FIG.
　先ず、図８に示すように、原反ロール（図示せず）から連続的に供給される帯状の外層シート３１と、原反ロール（図示せず）から連続的に供給される帯状の内層シート３２の間に、ウェストギャザーを形成するウエスト部弾性部材５、胴回りギャザーを形成する胴回り部弾性部材６及びレッグギャザーを形成するレッグ部弾性部材７を、所定の伸長率に伸長させた伸長状態で各々複数本配する。このとき、本実施態様においては、ウエスト部弾性部材５及び胴回り部弾性部材６には、接着剤塗工機（図示せず）によりホットメルト型接着剤を連続的あるいは間欠的に塗工し、レッグ部弾性部材７は、シートの流れ方向とは直交して往復運動する公知の揺動ガイド（図示せず）を介して、所定の脚周りパターンを形成しながら配される。また、帯状の外層シート３１及び帯状の内層シート３２には、それらを重ね合わせる前に、両シートの何れか一方又は双方の相対向する面の所定部位に、接着剤塗工機（図示せず）によりホットメルト型接着剤を塗工する。尚、ウエスト部弾性部材５、胴回り部弾性部材６等の弾性部材が、両シート３１，３２における、レーザー光の照射によって分断される部分（サイドシール部４の形成予定部分）（図５中符号１０Ｃで示す分断予定部分）を跨ぐように伸長状態で配されている場合、その分断後の該弾性部材の大幅な縮みや該弾性部材の抜け等の不都合を回避するために、該部分及びその近傍に接着剤を塗工しておくことが好ましい。 First, as shown in FIG. 8, a strip-shaped outer layer sheet 31 continuously supplied from an original fabric roll (not shown) and a strip-shaped inner layer sheet continuously supplied from an original fabric roll (not shown). 32, the waist elastic member 5 that forms the waist gathers, the waist elastic member 6 that forms the waist gathers, and the leg elastic member 7 that forms the leg gathers are extended to a predetermined elongation rate. Distribute multiple pieces each. At this time, in this embodiment, 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. Further, before the belt-like outer layer sheet 31 and the belt-like inner layer sheet 32 are overlapped, 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. Note that portions where elastic members such as the waist elastic member 5 and the waist elastic member 6 are divided by the irradiation of the laser light in both the sheets 31 and 32 (parts where the side seal portion 4 is to be formed) (reference numerals in FIG. 5). 10C, in order to avoid inconveniences such as significant shrinkage of the elastic member and disconnection of the elastic member after the division, It is preferable to apply an adhesive in the vicinity.
　そして、図８に示すように、一対のニップロール１１，１１の間に、ウエスト部弾性部材５、胴回り部弾性部材６及びレッグ部弾性部材７を伸長状態で挟み込んだ帯状の外層シート３１及び帯状の内層シート３２を送り込んで加圧することにより、帯状シート３１，３２間に複数本の弾性部材５，６，７が伸長状態で配された帯状の外装体３を形成する。その後、本実施態様においては、弾性部材プレカット手段（図示せず）を用いて、後述する吸収性本体２を配する位置に対応させて、複数本の胴回り部弾性部材６及び複数本のレッグ部弾性部材７を押圧して、収縮機能が発現されないように個々複数個に分断する。前記弾性部材プレカット手段としては、例えば、特開２００２－２５３６０５号公報に記載の複合伸縮部材の製造方法に用いる弾性部材分断部等が挙げられる。 And as shown in FIG. 8, between the pair of nip rolls 11, 11, a belt-shaped outer layer sheet 31 in which a waist elastic member 5, a waistline elastic member 6 and a leg elastic member 7 are sandwiched in an expanded state and a belt-shaped outer layer sheet 31. By feeding and pressurizing the inner layer sheet 32, 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. Thereafter, in the present embodiment, 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. Examples of 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.
　次いで、図８に示すように、別工程で製造された吸収性本体２に予めホットメルト接着剤等の接着剤を塗工（図示せず）し、該吸収性本体２を９０度回転させて、帯状の外装体３を構成する内層シート３２上に間欠的に供給して固定する。尚、吸収性本体固定用の接着剤は、吸収性本体２ではなく、内層シート３２における吸収性本体２の配置予定位置に予め塗工しても良い。 Next, as shown in FIG. 8, 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 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.
　次いで、図８に示すように、吸収性本体２が配置された帯状の外装体３におけるレッグ部弾性部材７で環状に囲まれた環状部の内側にレッグホールＬＯ’を形成する。このレッグホール形成工程は、ロータリーカッター、レーザーカッター等の従来からこの種の物品の製造方法における手法と同様の手法を用いて実施することができる。尚、本実施態様においては、帯状の外装体３に吸収性本体２を配置した後にレッグホールを形成しているが、吸収性本体２の配置前にレッグホールを形成しても良い。 Next, as shown in FIG. 8, a leg hole LO ′ is formed inside the annular portion 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. In the present embodiment, 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.
　次いで、帯状の外装体３をその幅方向（外装体３の搬送方向と直交する方向）に折り畳む。より具体的には、図８に示すように、帯状の外装体３の搬送方向に沿う両側部３ａ，３ａを、吸収性本体２の長手方向両端部を覆うように折り返して吸収性本体２の長手方向両端部を固定した後、外装体３を吸収性本体２と共にその幅方向に２つ折りする。こうして、目的のおむつ連続体１０（帯状のシート積層体）が得られる。 Next, 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. 8, both side portions 3 a, 3 a along the conveying direction of the strip-shaped exterior body 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.
　本実施態様のおむつの製造方法においては、こうして別途製造されたおむつ連続体１０（帯状のシート積層体）に対して、図４に示すように、レーザー式接合装置２０を用いて、一対のサイドシール部４，４（シール縁部）を有するパンツ型使い捨ておむつ１（シート融着体）を連続的に製造する。
　具体的には、図４に示すように、おむつ連続体１０（帯状のシート積層体）は、図示しない案内ロール等によって、所定のテンションが掛けられた状態で、矢印Ａ方向に回転駆動される円筒ロール２３の周面部を形成する支持部材２１の外面上に導入され、環状の支持部材２１の外周面に巻き掛けられて該円筒ロール２３の回転によりその周方向に所定距離搬送された後、図示しない導出ロール及びニップロール等によって該支持部材２１から離れる。このように、おむつ連続体１０を、円筒ロール２３の周面部を形成する支持部材２１に所定のテンションで巻き掛け且つ加圧ベルト２４によって圧接するようにして搬送することにより、おむつ連続体１０における支持部材２１と加圧ベルト２４とに挟まれた部分及びその近傍は、レーザー光の照射による分断前からその厚み方向に加圧（圧縮）された状態となるため、おむつ連続体１０が不織布を含む場合等に、該おむつ連続体１０をより効率的に圧縮させることができ、結果として、斯かる圧縮中のおむつ連続体１０に対してレーザー光を照射してこれを分断したときに、その分断された部分を構成する複数枚のシートの切断縁部どうしをより確実に融着させることが可能となり、サイドシール部４（シール縁部）の融着強度の一層の向上が図られる。 In the diaper manufacturing method of the present embodiment, the diaper continuous body 10 (band-shaped sheet laminated body) separately manufactured in this way is used as shown in FIG. The pants-type disposable diaper 1 (sheet fusion body) having the seal parts 4 and 4 (seal edges) is continuously manufactured.
Specifically, as shown in FIG. 4, the diaper continuous body 10 (band-shaped sheet laminate) 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 introduced onto the outer surface of the support member 21 that forms the peripheral surface portion of the cylindrical roll 23, wound around the outer peripheral surface of the annular support member 21 and conveyed by a predetermined distance in the circumferential direction by the rotation of the cylindrical roll 23, It leaves | separates from this support member 21 with the extraction | drawer roll and nip roll which are not shown in figure. 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 pressed (compressed) in the thickness direction from before being divided by the irradiation of the laser beam. The diaper continuum 10 can be more efficiently compressed when it is included, and as a result, when the diaper continuum 10 under compression is irradiated with laser light and divided, It becomes possible to fuse the cut edge portions of the plurality of sheets constituting the divided portion more reliably, and further improve the fusion strength of the side seal portion 4 (seal edge portion). It is achieved.
　おむつ連続体１０が、支持部材２１上に導入されてからこれを離れるまでの該支持部材２１（円筒ロール２３）の回転角度は、例えば、９０～２７０度とすることができ、より好ましくは１２０～２７０度である。また、加圧ベルト２４（押さえ部材）によりおむつ連続体１０を支持部材２１に圧接させる角度（圧接角度）の範囲は、円筒状の支持部材２１（円筒ロール２３）の周方向の全周に亘って圧接させる場合を３６０度とした場合に、９０～２７０度であることが好ましく、より好ましくは１２０～２７０度である。 The rotation angle of the support member 21 (cylindrical 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) is the entire circumference of the cylindrical support member 21 (cylindrical roll 23). When the pressure contact is 360 degrees, it is preferably 90 to 270 degrees, and more preferably 120 to 270 degrees.
　本実施態様のおむつの製造方法における、シール縁部（サイドシール部４，４）を形成するシール縁部形成工程について詳述すると、図４、図５及び図６に示すように、支持部材２１に当接しているおむつ連続体１０の他方の面１０ｂ（支持部材２１との当接面である一方の面１０ａとは反対側の面）に、加圧ベルト２４（押さえ部材）を押し付け、加圧状態とする。そして加圧状態のおむつ連続体１０を搬送しながら、該おむつ連続体１０に対して、図６（ａ）に示す位置から図６（ｂ）に示す位置を経て図６（ｃ）に示す位置を通過することを含む過程において、支持部材２１側からスリット状の開口部２７に沿って、レーザー光３０を照射ヘッド３５から照射することにより、おむつ連続体１０を個々に分断するのと同時に、その分断によって生じた加圧状態にある複数枚のシートの切断縁部どうしを融着して、サイドシール部４，４（シール縁部）を形成し、一対のサイドシール部４，４（シール縁部）を有する外装体３（シート融着体）を具備するパンツ型使い捨ておむつ１（シート融着体）を連続的に製造する。このように、レーザー光３０の照射は、支持部材２１と加圧ベルト２４とに挟まれることによって加圧状態（圧縮状態）にあるおむつ連続体１０に対して行うことが、該照射によって生じた複数枚のシートの切断縁部どうしを確実に融着させて、サイドシール部４の融着強度を向上させる観点から好ましい。以下、更に具体的に、パンツ型使い捨ておむつ１（シート融着体）の製造工程を説明する。 The seal edge portion forming step for forming the seal edge portions (side seal portions 4 and 4) in the diaper manufacturing method of the present embodiment will be described in detail. As shown in FIGS. The pressure belt 24 (pressing member) is pressed against the other surface 10b of the diaper continuous body 10 that is in contact with the surface (the surface opposite to the one surface 10a that is in contact with the support member 21). Pressure state. Then, while conveying the diaper continuum 10 in a pressurized state, the position shown in FIG. 6 (c) through the position shown in FIG. 6 (b) from the position shown in FIG. 6 (a) with respect to the diaper continuum 10. In the process including passing through the diaper continuum 10 by irradiating the laser beam 30 from the irradiation head 35 along the slit-shaped opening 27 from the support member 21 side, The cut edge portions of a plurality of sheets in a pressurized state generated by the division are fused together to form side seal portions 4, 4 (seal edge portions), and a pair of side seal portions 4, 4 (seal A pants-type disposable diaper 1 (sheet fused body) having an exterior body 3 (sheet fused body) having an edge is continuously manufactured. As described above, the irradiation of the laser beam 30 was performed on the diaper continuum 10 in a pressurized state (compressed state) by being sandwiched between the support member 21 and the pressure belt 24 by the irradiation. This is preferable from the viewpoint of reliably fusing the cutting edges of a plurality of sheets to improve the fusing strength of the side seal portion 4. Hereinafter, the manufacturing process of the pants-type disposable diaper 1 (sheet fusion body) will be described more specifically.
　シール縁部形成工程は、図４～図６、及び図９に示すように、開口部２７を断面視して、スリット状の開口部２７を形成する支持部材２１の両端部２１ｅ，２１ｅそれぞれに、互いの間隔が帯状のシート積層体（おむつ連続体１０）側よりも照射ヘッド３２側の方が広がるテーパー２１１を設けて行う。図６及び図９は、レーザー式接合装置２０を用いておむつ連続体１０（帯状のシート積層体）を分断するのと同時にサイドシール部４（シール縁部）を形成する様子を説明する図であり、図６には、おむつ連続体１０のレーザー光３０による分断予定部分１０Ｃ及びその近傍が模式的に示されている。本実施態様におけるおむつ連続体１０の分断予定部分１０Ｃは、図６に示すように、おむつ連続体１０の吸収性本体２が配置されていない領域における長手方向（搬送方向Ａ）の中央である。斯かる分断予定部分１０Ｃは、ウエスト開口部８（図１参照）の開口端部及びその近傍が、８枚のシートが重ねられた８層構造部分、それ以外の部分が、４枚のシートが重ねられた４層構造部分となっている。４層構造部分は、図６に示すように、腹側部１Ａにおける１枚の外装体３を構成する２枚のシート（外層シート３１及び内層シート３２）と、背側部１Ｂにおける１枚の外装体３を構成する同じく２枚のシート３１，３２とからなり、これら４枚のシートが積層されて構成されている。一方、８層構造部分は、前述したように、おむつ連続体１０の製造時に帯状の外装体３の両側部３ａ，３ａが吸収性本体２の長手方向両端部を覆うように折り返されている（図８参照）ことに起因して、腹側部１Ａ及び背側部１Ｂそれぞれに外装体３が２枚存し且つこれら計４枚の外装体３，３が積層されているので、結果として８枚のシート３１，３２が積層されて構成されている。尚、４層構造部分及び８層構造部分それぞれにおいて、互いに重なり合うシート３１，３２間には、ウエスト部弾性部材５、胴回り部弾性部材６等の弾性部材が介在配置されている場合があるが、図６では、説明容易の観点から、該弾性部材の図示を省略している。以下、主として、４層構造部分について説明するが、特に断らない限り、８層構造部分も４層構造部分と同様に構成されサイドシール部４が形成される。 As shown in FIGS. 4 to 6 and 9, the seal edge portion forming step is performed on each of the both end portions 21e and 21e of the support member 21 that forms the slit-like opening portion 27 when the opening portion 27 is viewed in cross section. A taper 211 is provided in which the distance between the irradiation heads 32 is larger than that of the belt-like sheet laminate (diaper continuous body 10). 6 and 9 are diagrams for explaining how the side seal portion 4 (seal edge portion) is formed at the same time as the diaper continuous body 10 (band-shaped sheet laminate) is divided by using the laser bonding apparatus 20. Yes, FIG. 6 schematically shows a portion 10C to be divided by the laser beam 30 of the diaper continuous body 10 and its vicinity. As shown in FIG. 6, the scheduled division portion 10 </ b> C of the diaper continuous body 10 in the present embodiment is the center in the longitudinal direction (conveying direction A) in the region where the absorbent main body 2 of the diaper continuous body 10 is not disposed. Such a portion 10C to be divided includes an end portion of the waist opening 8 (see FIG. 1) and its vicinity, an eight-layer structure portion in which eight sheets are stacked, and the other portions are four sheets. It is a four-layer structure part that is superimposed. As shown in FIG. 6, the four-layer structure portion includes two sheets (an outer layer sheet 31 and an inner layer sheet 32) that form one exterior body 3 in the ventral side part 1 </ b> A, and one sheet in the back side part 1 </ b> B. It consists of the same two sheets 31 and 32 which comprise the exterior body 3, and these four sheets are laminated | stacked and comprised. On the other hand, as described above, 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 ( 8), two exterior bodies 3 exist on each of the abdominal portion 1A and the back side portion 1B, and a total of these four exterior bodies 3 and 3 are laminated. As a result, 8 The sheets 31 and 32 are laminated. In each of the 4-layer structure portion and the 8-layer structure portion, 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. In FIG. 6, the elastic member is not shown for easy explanation. Hereinafter, 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.
　おむつ連続体１０における４層構造の分断予定部分１０Ｃにおいて、おむつ連続体１０の一方の面１０ａ（支持部材２１との当接面）を構成する外層シート３１及び一方の面１０ａを構成するシート以外のシート（内層シート３２）は、何れか一方又は両方が、レーザー光３０を吸収して発熱するシートである。本実施態様においては、分断予定部分１０Ｃを構成する４枚のシート３１，３２の全てが、レーザー光３０を吸収して発熱するシート（不織布）である。また、分断予定部分１０Ｃ及びその近傍における互いに重なり合う２枚のシート間は、レーザー光３０の照射前において、接着剤等により接合されていても良く、全く接合されていなくても良い。 Other than the sheet constituting the outer layer sheet 31 and the one surface 10a constituting the one surface 10a (the contact surface with the support member 21) of the diaper continuum 10 in the planned division portion 10C of the four-layer structure in the diaper continuum 10 One or both of the sheets (inner layer sheet 32) absorb the laser beam 30 and generate heat. In the present embodiment, all of the four sheets 31 and 32 constituting the parting planned portion 10 </ b> C are sheets (nonwoven fabrics) that absorb the laser beam 30 and generate heat. Further, the two overlapping sheets in the part to be divided 10C and the vicinity thereof may be joined by an adhesive or the like before irradiation with the laser light 30, or may not be joined at all.
　おむつ連続体１０は、図６に示すように、一方の面１０ａが支持部材２１に当接し且つ分断予定部分１０Ｃがスリット状の開口部２７上に位置するように、矢印Ａ方向に回転する支持部材２１上に導入されると共に、他方の面１０ｂに加圧ベルト２４（押さえ部材）が押し付けられることによって、矢印Ａ方向に搬送されつつ厚み方向に加圧（圧縮）される。そして、斯かる搬送中且つ加圧状態の分断予定部分１０Ｃに対して、図６（ａ）に示す上流側の位置から図６（ｂ）に示す位置を経て図６（ｃ）に示す下流側の位置を通過することを含む過程において、支持部材２１側からスリット状の開口部２７に沿ってレーザー光３０が照射される。前述したように、レーザー光３０の照射点（焦点ｆ）は、ミラー３５２によって、円筒ロール２３の周方向に任意に移動可能に構成されており、開口部２７の該周方向に沿った移動に追従して走査するように設定されているので、該開口部２７上に位置する分断予定部分１０Ｃには、その搬送中にレーザー光３０が一定時間連続的に照射される。 As shown in FIG. 6, the diaper continuous body 10 is supported so as to rotate in the direction of arrow A so that one surface 10 a abuts on the support member 21 and the parting portion 10 C is located on the slit-shaped opening 27. While being introduced onto the 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. 6C from the upstream position shown in FIG. 6 (a) through the position shown in FIG. 6 (b) with respect to the parting portion 10C that is being transported and pressurized. In the process including passing the position, the laser beam 30 is irradiated along the slit-shaped opening 27 from the support member 21 side. As described above, the irradiation point (focal point f) of the laser beam 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 23 by the mirror 352, and the opening 27 is moved along the circumferential direction. Since the scanning is set so as to follow, 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.
　このように、搬送されている対象物であるおむつ連続体１０の幅方向（Ｘ方向）に沿って、レーザー光３０が、上流側の図６（ａ）に示す位置から下流側の図６（ｃ）に示す位置を通過することを含む過程において、照射されているが、スリット状の開口部２７を形成する支持部材２１の各端部２１ｅに、テーパー２１１が設けられているので、照射されたレーザー光３０が支持部材２１の各端部２１ｅに当たり難く、レーザー光３０のエネルギーロスを抑えて照射できる。また、レーザー式接合装置２０には、図４、図５及び図６に示すように、スリット状の開口部２７にシリンドリカルレンズ５０が配されている。その為、レーザー光３０の照射をスリット状の開口部２７に配されたシリンドリカルレンズ５０を介して行い、シリンドリカルレンズ５０により、開口部２７に向かって照射されたレーザー光３０を、開口部２７の搬送方向中心に屈折させるようにして帯状のおむつ連続体１０（シート積層体）に入射させることができる。即ち、シリンドリカルレンズ５０が配されているので、開口部２７に向かって照射されたレーザー光３０を、開口部２７の搬送方向中心に屈折させるようにして帯状のおむつ連続体１０（シート積層体）に効率的に入射させることができる。 Thus, along the width direction (X direction) of the diaper continuous body 10 which is the object being conveyed, the laser beam 30 is moved downstream from the position shown in FIG. In the process including passing through the position shown in c), the irradiation is performed, but the taper 211 is provided at each end portion 21e of the support member 21 forming the slit-shaped opening 27, so that the irradiation is performed. The laser beam 30 is difficult to hit each end 21e of the support member 21, and the laser beam 30 can be irradiated with reduced energy loss. In addition, as shown in FIGS. 4, 5, and 6, the laser bonding apparatus 20 has a cylindrical lens 50 disposed in the slit-shaped opening 27. Therefore, the laser beam 30 is irradiated through the cylindrical lens 50 disposed in the slit-shaped opening 27, and the laser beam 30 irradiated toward the opening 27 by the cylindrical lens 50 is applied to the opening 27. It can be made to enter into the belt-like diaper continuous body 10 (sheet laminated body) so as to be refracted in the center in the conveying direction. That is, since the cylindrical lens 50 is disposed, the belt-like diaper continuous body 10 (sheet laminated body) is configured so that the laser light 30 irradiated toward the opening 27 is refracted to the center of the opening 27 in the conveyance direction. Can be efficiently incident.
　４層構造の分断予定部分１０Ｃにレーザー光３０が照射されると、該分断予定部分１０Ｃに存するシート３１，３２の形成材料（繊維等）は、レーザー光３０の直射による発熱によって気化して消失し、該分断予定部分１０Ｃの近傍に存する該形成材料は、レーザー光３０によって間接的に熱せされて溶融する。その結果、図９に示すように、４層構造の分断予定部分１０Ｃが分断されて、おむつ連続体１０から１つの枚葉のシート積層体（おむつ前駆体）が切り分けられる形で、該おむつ連続体１０が分断されるのと同時に、その分断によって生じた該枚葉のシート積層体における４枚のシート３１，３２の切断縁部どうし、及び、切り分けられた該おむつ連続体１０における４枚のシート３１，３２の切断縁部どうしが、それぞれ融着する。これらの切断縁部どうしは、それぞれ、その形成前（レーザー光３０の照射によるおむつ連続体１０の分断前）から、支持部材２１と加圧ベルト２４とに挟まれることによって加圧状態（圧縮状態）とされていたものである。 When the laser beam 30 is irradiated to the parting portion 10C having the four-layer structure, 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. As a result, as shown in FIG. 9, the diaper continuous portion 10 </ b> C having a four-layer structure is divided, and a single sheet stack (diaper precursor) is cut from the diaper continuous body 10. At the same time that the body 10 is divided, the cut edges of the four sheets 31 and 32 in the sheet laminate of the single sheet produced by the division, and the four pieces in the separated diaper continuous body 10 are separated. The cut edges of the sheets 31 and 32 are fused together. Each of these cut edges is pressed (compressed) 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 irradiation with the laser beam 30). ).
　本実施態様のおむつの製造方法によれば、このように、一回のレーザー光の照射で、帯状のシート積層体の分断と、その分断によって生じた２箇所の加圧状態にあるシートの切断縁部どうしの融着とを同時に実施するため、２箇所の融着箇所を二回のレーザー光の照射で融着する方法（本発明の範囲外の方法）に比べ、おおよそ半分のレーザー出力で融着と分断とを同一工程で実施でき、シートの縁部が重なった状態で融着したシール縁部（サイドシール部４）を有するシート融着体（外装体３（シート融着体）を備えるパンツ型使い捨ておむつ１）を効率的に製造することができる。また、融着と分断とを同一工程で行えるため、シートの切断縁部どうしが融着されていない非シール縁部が発生しないので、材料の削減効果もある。 According to the manufacturing method of the diaper of the present embodiment, as described above, with a single laser light irradiation, the strip-shaped sheet laminate is divided, and the sheets in the two pressed states generated by the division are cut. In order to carry out the fusion of the edges at the same time, the laser output is approximately half that of the method of fusion of the two fusion spots by two laser beam irradiations (the method outside the scope of the present invention). A sheet fusion body (exterior body 3 (sheet fusion body)) having a sealing edge portion (side seal portion 4) fused in a state where the edge portions of the sheets can be overlapped can be performed in the same process. The pants-type disposable diaper 1) provided can be efficiently manufactured. In addition, since fusion and division can be performed in the same process, a non-sealing edge in which the cut edges of the sheet are not fused is not generated, so that there is an effect of reducing material.
　シート３１，３２の切断縁部は、レーザー光３０の照射中及び照射終了直後は、発熱して溶融状態となっているが、レーザー光３０の照射によっておむつ連続体１０から切り分けられた１つの枚葉のシート積層体（おむつ前駆体）及び該おむつ連続体１０それぞれの、支持部材２１と加圧ベルト２４とによる加圧状態が保持されたまま、照射終了後からは外気や支持部材２１・加圧ベルト２４への伝熱によって速やかに冷却されて固化し、該切断縁部の形成材料（繊維等）が溶融一体化した融着部４０となる。こうして、融着部４０が形成されることによって、１個のおむつ１における一対のサイドシール部４，４のうちの一方が形成される。尚、必要に応じ、吸引装置、排気装置等の公知の冷却手段を用いてシート３１，３２の切断縁部を強制的に冷却し、融着部４０の形成を促進しても良い。 The cut 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 leaf sheet laminate (diaper precursor) and the diaper continuum 10 are maintained in a pressurized state by the support member 21 and the pressure belt 24, and after the irradiation is completed, the outside air and the support member 21 are added. The material is quickly cooled and solidified by heat transfer to the pressure belt 24 to form the fused portion 40 in which the forming material (fibers and the like) of the cut edge is melted and integrated. 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.
　こうして１箇所の分断予定部分１０Ｃが分断されると、レーザー光３０は、その照射点（焦点ｆ）が搬送方向Ａとは逆方向に隣接する別の開口部２７に当たるように移動され、該別の開口部２７を介してその上に位置する別の分断予定部分１０Ｃに照射される。これにより、別の分断予定部分１０Ｃが前記と同様に分断・融着され、先に形成されたサイドシール部４と対をなす他方のサイドシール部４（融着部４０）が形成される。以後、同様の操作を繰り返すことにより、一対のサイドシール部４，４（シール縁部）を有する外装体３（シート融着体）を具備するパンツ型使い捨ておむつ１（シート融着体）が連続的に製造される。 When one portion 10C to be divided is divided in this way, the laser beam 30 is moved so that the irradiation point (focal point f) hits another opening 27 adjacent in the direction opposite to the conveyance direction A. It is irradiated to another parting plan part 10C located on it through the opening part 27 of this. As a result, another part 10C to be divided is divided and fused in the same manner as described above, and the other side seal part 4 (fused part 40) that forms a pair with the previously formed side seal part 4 is formed. Thereafter, by repeating the same operation, the pants-type disposable diaper 1 (sheet fused body) including the exterior body 3 (sheet fused body) having a pair of side seal portions 4 and 4 (seal edge portions) is continuous. Manufactured.
　図１０には、図４に示すレーザー式接合装置の他の変形例が示されている。この変形例については、前述したレーザー式接合装置２０と異なる構成部分を主として説明し、同様の構成部分は同一の符号を付して説明を省略する。特に説明しない構成部分は、レーザー式接合装置２０についての説明が適宜適用される。 FIG. 10 shows another modification of the laser type bonding apparatus shown in FIG. About this modification, a different component from the laser type joining apparatus 20 mentioned above is mainly demonstrated, the same component is attached | subjected the same code | symbol and description is abbreviate | omitted. For the components not specifically described, the description of the laser type bonding apparatus 20 is appropriately applied.
　図４に示すレーザー式接合装置２０は、中空の円筒ロール２３の中空部に設けられた照射ヘッド３５から、該円筒ロール２３の周面部を形成する支持部材２１に向けて、レーザー光３０を照射するように構成されていたのに対し、図１０に示すレーザー式接合装置２０Ａは、ベルト式加圧装置２６の加圧ベルト２４Ａに囲まれた空間内に設けられた照射ヘッド３５から、加圧ベルト２４Ａに向けて、レーザー光３０を照射するように構成されている。言い換えれば、図４に示すレーザー式接合装置２０は、中空の円筒ロール２３の中空部に配された照射する照射ヘッド３５からおむつ連続体１０にレーザー光３０を照射しているのに対し、図１０に示すレーザー式接合装置２０Ａは、環状の押さえ部材２３Ａの外部に配された照射する照射ヘッド３５からおむつ連続体１０にレーザー光３０を照射している。更に説明すると、レーザー式接合装置２０Ａは、矢印Ａ方向に回転駆動される円筒ロール２３Ａ（押さえ部材）と、無端状の加圧ベルト２４Ａを備えたベルト式加圧装置２６とを備え、円筒ロール２３Ａが押さえ部材、加圧ベルト２４Ａが、レーザー光３０が通過可能な光通過部（図示せず）を有する支持部材２１である。円筒ロール２３Ａは中実の円筒状を有し、その周面部２３Ａａは平滑である。但し、おむつ連続体１０の厚みが均一でない場合は、該おむつ連続体１０における相対的に厚みの大きい部分（例えば吸収性本体２の配置領域）が収まる凹部を周面部２３Ａａに有してもよい。加圧ベルト２４Ａ（支持部材２１）の図示しない光通過部は、レーザー式接合装置２０における支持部材２１（円筒ロール２３の周面部）の開口部２７と同様に、平面視して矩形形状のスリット状の開口部であり、その長手方向を加圧ベルト２４Ａの幅方向（加圧ベルト２４Ａが架け渡された３本のロール２５ａ，２５ｂ，２５ｃそれぞれの回転軸と平行な方向）に一致させて、加圧ベルト２４Ａの長さ方向に所定間隔を置いて複数形成されている。加圧ベルト２４Ａ（支持部材２１）としては、レーザー式接合装置２０における押さえ部材としての加圧ベルト２４と同様のものを用いることができる。尚、スリット状の開口部を形成する支持部材２１（加圧ベルト２４Ａ）の両端部には、それぞれ、互いの間隔が押さえ部材（円筒ロール２３Ａ）側よりも照射ヘッド３５側の方が広がるテーパー（不図示）が設けられている。 4 irradiates a laser beam 30 from an irradiation head 35 provided in a hollow portion of a hollow cylindrical roll 23 toward a support member 21 that forms a peripheral surface portion of the cylindrical roll 23. In contrast to this, the laser type bonding apparatus 20A shown in FIG. 10 is pressurized from the irradiation head 35 provided in the space surrounded by the pressure belt 24A of the belt type pressure apparatus 26. The laser beam 30 is radiated toward the belt 24A. In other words, the laser type bonding apparatus 20 shown in FIG. 4 irradiates the diaper continuum 10 with the laser light 30 from the irradiation head 35 that is arranged in the hollow portion of the hollow cylindrical roll 23. The laser type joining apparatus 20A shown in 10 irradiates the diaper continuous body 10 with the laser beam 30 from the irradiation head 35 that irradiates the annular pressing member 23A. More specifically, the laser-type bonding apparatus 20A includes a cylindrical roll 23A (pressing member) that is rotationally driven in the direction of arrow A, and a belt-type pressure device 26 that includes an endless pressure belt 24A. 23A is a pressing member, and the pressure belt 24A is a support member 21 having a light passage portion (not shown) through which the laser beam 30 can pass. The cylindrical roll 23A has a solid cylindrical shape, and its peripheral surface portion 23Aa is smooth. However, when the thickness of the diaper continuous body 10 is not uniform, the peripheral surface portion 23Aa may have a concave portion in which a relatively thick portion (for example, an arrangement region of the absorbent main body 2) in the diaper continuous body 10 is accommodated. . The light passing portion (not shown) of the pressure belt 24A (support member 21) is a rectangular slit in plan view, like the opening 27 of the support member 21 (circumferential surface portion of the cylindrical roll 23) in the laser type bonding apparatus 20. The longitudinal direction is made to coincide with the width direction of the pressure belt 24A (direction parallel to the respective rotation axes of the three rolls 25a, 25b, 25c around which the pressure belt 24A is stretched). A plurality of pressure belts 24A are formed at predetermined intervals in the length direction. As the pressure belt 24 </ b> A (support member 21), the same belt as the pressure belt 24 as a pressing member in the laser type bonding apparatus 20 can be used. Note that, at both ends of the support member 21 (pressure belt 24A) forming the slit-shaped opening, the taper is such that the distance between the irradiation head 35 side and the space between the pressing member (cylindrical roll 23A) is wider. (Not shown) is provided.
　レーザー式接合装置２０Ａを用いたパンツ型使い捨ておむつの製造方法においては、図１０に示すように、おむつ連続体１０を、図示しない案内ロール等によって、その他方の面１０ｂが円筒ロール２３Ａ（押さえ部材）の周面部２３Ａａと当接するように、該周面部２３Ａａ上に導入し、円筒ロール２３Ａに巻き掛けられるようにして連続搬送しつつ、その一方の面１０ａを、レーザー光３０が通過可能なスリット状の図示しない開口部（光通過部）を有する、加圧ベルト２４Ａ（支持部材２１）の外面に当接させると共に、他方の面１０ｂを円筒ロール２３Ａの周面部２３Ａａに押し付け、その状態（加圧状態）のおむつ連続体１０に対して、加圧ベルト２４Ａ側から該開口部を介してレーザー光３０を照射することにより、おむつ連続体１０を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシートの切断縁部どうしを融着させて、一対のサイドシール部４，４（シール縁部）を有する外装体３（シート融着体）を具備するパンツ型使い捨ておむつ１（シート融着体）を連続的に製造する。 In the manufacturing method of the pants-type disposable diaper using the laser-type joining device 20A, as shown in FIG. 10, the diaper continuous body 10 is placed on the other side 10b by a cylindrical roll 23A (holding member) by a guide roll (not shown). ) Is introduced onto the peripheral surface portion 23Aa so as to come into contact with the peripheral surface portion 23Aa, and is continuously conveyed so as to be wound around the cylindrical roll 23A, while the laser beam 30 can pass through the one surface 10a. The pressure belt 24A (support member 21) having an opening (light passage portion) (not shown) is brought into contact with the outer surface of the pressure belt 24A and the other surface 10b is pressed against the peripheral surface portion 23Aa of the cylindrical roll 23A. By irradiating the diaper continuous body 10 with the laser beam 30 from the pressure belt 24A side through the opening, At the same time that the body 10 is divided, the cut edges of the plurality of sheets in the pressurized state generated by the division are fused together to have a pair of side seal parts 4 and 4 (seal edges). A pants-type disposable diaper 1 (sheet fused body) having an exterior body 3 (sheet fused body) is continuously manufactured.
　図４に示すレーザー式接合装置の他の変形例としては、図１０に示すレーザー式接合装置２０Ａ以外に、フラットな支持部材２１を用いて、帯状のおむつ連続体１０（シート積層体）を平行移動させながら、該帯状のおむつ連続体１０（シート積層体）に対して、上方の照射ヘッド３５からレーザー光３０を照射する装置であってもよい。 As another modification of the laser type bonding apparatus shown in FIG. 4, in addition to the laser type bonding apparatus 20 </ b> A shown in FIG. 10, the flat diaper continuous body 10 (sheet laminated body) is parallel using a flat support member 21. It may be an apparatus that irradiates the continuous diaper 10 (sheet laminate) with the laser beam 30 from the upper irradiation head 35 while being moved.
　本発明に係るレーザー光について説明すると、シート積層体に照射するレーザー光としては、シート積層体を構成するシートに吸収され該シートを発熱させる発振波長のレーザー光を用いる。ここで、「シート積層体を構成するシート」は、シート積層体の一方の面（支持部材との当接面）を構成するシート（例えば前記実施態様では外層シート３１）に限定されず、シート積層体を構成するシートであればどれであっても良い。シート積層体に照射するレーザー光が、該シート積層体を構成する個々のシートについて、該シートに吸収されて該シートを発熱させる発振波長であるか否かは、シートの材質と、使用するレーザー光の発振波長との関係で決まる。シート積層体を構成するシートが、前記実施態様のように、使い捨ておむつや生理用ナプキン等の吸収性物品（サニタリー用品）の製造に汎用される合成樹脂製の不織布やフィルムである場合、レーザー光としては、ＣＯ2レーザー、ＹＡＧレーザー、ＬＤレーザー（半導体レーザー）、ＹＶＯ４レーザー、ファイバーレーザー等を用いることが好ましい。また、シート積層体を構成するシートが、合成樹脂として、ポリエチレン、ポリエチレンテレフタレート、ポリプロピレン等を含む場合、該シートに吸収され該シートを良好に発熱させ得る発振波長としては、例えば、８．０～１５μｍを用いることが好ましく、高出力のレーザー装置が存在するＣＯ2レーザーの発振波長の９．０～１１．０μｍを用いることが特に好ましい。レーザー光のスポット（照射点、焦点ｆ）径、レーザー出力等は、シート積層体を構成するシートの材質や厚み等を考慮して適宜選択することができる。 The laser light according to the present invention will be described. Laser light having an oscillation wavelength that is absorbed by the sheets constituting the sheet laminate and generates heat is used as the laser light applied to the sheet laminate. Here, the “sheet constituting the sheet laminate” is not limited to a sheet (for example, the outer layer sheet 31 in the above embodiment) constituting one surface of the sheet laminate (contact surface with the support member). Any sheet may be used as long as it constitutes the laminate. Whether the laser beam applied to the sheet laminate is an oscillation wavelength that is absorbed by the sheet and generates heat for the individual sheets constituting the sheet laminate is determined by the material of the sheet and the laser used. It depends on the relationship with the oscillation wavelength of light. When the sheet constituting the sheet laminate is a non-woven fabric or film made of a synthetic resin widely used for manufacturing absorbent articles (sanitary goods) such as disposable diapers and sanitary napkins as in the above embodiment, laser light It is preferable to use a CO 2 laser, a YAG laser, an LD laser (semiconductor laser), a YVO4 laser, a fiber laser, or the like. When the sheet constituting the sheet laminate includes polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, the oscillation wavelength that can be absorbed by the sheet and cause the sheet to generate heat is, for example, 8.0 to It is preferable to use 15 μm, and it is particularly preferable to use 9.0 to 11.0 μm of the oscillation wavelength of the CO 2 laser in which a high-power laser device exists. The spot (irradiation point, focal point f) 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 sheet laminate.
　本発明で製造されるシート融着体は、そのまま、あるいは他の部材と一体化されて各種の物品として用いることができる。各種の物品としては、前述したパンツ型使い捨ておむつ以外の他の吸収性物品として、例えば、生理用ナプキン、失禁パッド等が挙げられ、また、吸収性物品以外には、床面清掃用のシート、身体清拭用のシート、身体加温用の発熱具等が挙げられる。例えば、吸収性物品を構成するシート融着体としては、ａ）吸収性物品の肌当接面を形成する表面シートと非肌当接面を形成する裏面シートとが、吸収体の周縁部より延出した部分で接合されているもの、ｂ）生理用ナプキンにおける、表面シートとウイング部形成用シート、ウイング部形成用シートと裏面シート、表面シートとウイング部形成用シートと裏面シート、が融着したもの、等が挙げられる。 The sheet fusion product produced in the present invention can be used as various articles as it is or integrated with other members. Examples of 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. For example, as 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) In the sanitary napkin, 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.
　特に、本発明で製造されるシート融着体は、シール縁部の柔軟性、肌触りに優れていることから、吸収性物品が生理用ナプキンである場合、シート融着体を製造する工程を、吸収体を介在させた表面シートと裏面シートとを生理用ナプキンの外周に沿って接合する外周シール部形成に用いても良い。また、シート融着体を製造する工程を、吸収体を介在させた表面シートと裏面シートとを、生理用ナプキンにおける本体部分（ウイングを除く部分）の外周に沿って接合する外周シール部形成に用いても良い。 In particular, since 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 | sticker part formation which joins the surface sheet and back surface sheet which interposed the absorber along the outer periphery of the sanitary napkin. In addition, 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.
　以上、本発明を、その好ましい実施形態及び好ましい実施態様に基づいて説明したが、本発明は、前記実施形態又は前記実施態様に制限されることなく、本発明の趣旨を逸脱しない範囲で適宜変更が可能である。例えば、シート積層体は、図６に示す如き４枚のシートが重ねられたものの他、２枚、３枚又は５枚以上のシートが重ねられたものであっても良い。また、おむつ連続体１０（シート積層体）を円筒ロール２３（支持部材２１）に皴やたるみを発生させずに巻き掛けるために、レーザー式接合装置２０に、おむつ連続体１０のテンションを制御する機構を具備させても良い。また、レーザー光の照射によって発生したガスを開口部２７から除去するために、レーザー式接合装置２０に、該ガスの排気手段又は開口部２７にエアーを吹き付ける手段を具備させても良い。また、レーザー式接合装置２０は、押さえ部材２４におけるおむつ連続体１０との当接面に付着した樹脂等を除去するための機構を備えていても良い。また、レーザー式接合装置２０には、図４、図５及び図６に示すように、シリンドリカルレンズ５０が、円筒状の支持部材２１の開口部２７毎に配されているが、配さなくてもよい。前述した一の実施形態又は実施態様のみが有する部分は、すべて適宜相互に利用できる。 As mentioned above, although this invention was demonstrated based on the preferable embodiment and preferable embodiment, this invention is not restrict | limited to the said embodiment or the said embodiment, and changes suitably in the range which does not deviate from the meaning of this invention. Is possible. For example, the sheet laminated body may be one in which two, three, or five or more sheets are stacked in addition to those in which four sheets are stacked as shown in FIG. Further, the tension of the diaper continuous body 10 is controlled on the laser bonding apparatus 20 in order to wrap the diaper continuous body 10 (sheet laminated body) around the cylindrical roll 23 (support member 21) without generating wrinkles or sagging. A mechanism may be provided. Further, in order to remove the gas generated by laser light irradiation from the opening 27, the laser bonding apparatus 20 may be provided with a means for exhausting the gas or a means for blowing air to the opening 27. Further, the laser-type 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. In addition, as shown in FIGS. 4, 5, and 6, the cylindrical lens 50 is disposed in the laser bonding apparatus 20 for each opening 27 of the cylindrical support member 21. Also good. All the parts of the above-described one embodiment or embodiment can be used as appropriate.
　また、レーザー式接合装置２０には、図４、図５及び図６に示すように、円筒状の支持部材２１の開口部２７に、シリンドリカルレンズ５０が配されているが、シリンドリカルレンズ５０の代わりに、トーリックレンズが配されていてもよい。該トーリックレンズは、シリンドリカルレンズを曲げた形状のレンズであり、光路長に合わせてピントが合うように屈折面位置を変化させることができる。また、該トーリックレンズは、シリンドリカルレンズ５０が、一方向だけの集光・発散であるのに対して、もう一つの方向にも、任意に、集光・発散することができる点で有効である。尚、該トーリックレンズも、シリンドリカルレンズ５０と同様に、該トーリックレンズの凸が、押さえ部材（加圧ベルト２４）側とは反対側に凸となるように、言い換えれば、環状の支持部材２１を備えた円筒ロール２３の中心に向かって凸となるように配される。 In addition, as shown in FIGS. 4, 5, and 6, the laser bonding apparatus 20 is provided with a cylindrical lens 50 in the opening 27 of the cylindrical support member 21, but instead of the cylindrical lens 50. In addition, a toric lens may be arranged. The toric lens is a lens having a shape obtained by bending a cylindrical lens, and the position of the refracting surface can be changed so as to be focused in accordance with the optical path length. Further, the toric lens is effective in that the cylindrical lens 50 can collect and diverge light in one direction arbitrarily while the cylindrical lens 50 collects and diverges in only one direction. . In addition, the toric lens is also provided with an annular support member 21 so that the convexity of the toric lens is convex on the side opposite to the pressing member (pressure belt 24) side, in other words, like the cylindrical lens 50. It arrange | positions so that it may become convex toward the center of the cylindrical roll 23 with which it was equipped.
　前述した本発明の実施形態又は実施態様に関し、更に以下の付記を開示する。 The following additional notes are further disclosed with respect to the embodiment or the embodiment of the present invention described above.
＜１＞
　複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置であって、
　レーザー光を集光するレンズを有する照射ヘッドと、少なくとも一部に樹脂材を含む複数枚のシートが重ねられた帯状のシート積層体の一方の面を支持しながら搬送する支持部材と、該帯状のシート積層体の他方の面側から該支持部材に該帯状のシート積層体を当接させ加圧状態にする押さえ部材とを具備し、
　前記支持部材は、集光されたレーザー光が該支持部材側から通過可能な、前記シート積層体の幅方向に長いスリット状の開口部を有しており、
　前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部には、それぞれ、互いの間隔が前記押さえ部材側よりも前記照射ヘッド側の方が広がるテーパーが設けられており、
　前記押さえ部材による加圧状態の前記帯状のシート積層体に、前記支持部材側から集光されたレーザー光を前記スリット状の開口部に沿って照射して分断すると共に、この分断の縁部を重なった状態で融着し、前記シール縁部を有するシート融着体を複数個連続的に製造するシート融着体の製造装置。 <1>
An apparatus for producing a sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets overlap with each other,
An irradiation head having a lens for condensing laser light, a support member that conveys while supporting one surface of a belt-shaped sheet laminate in which a plurality of sheets including a resin material at least partially are stacked, and the belt shape A pressing member that brings the belt-shaped sheet laminate into contact with the support member from the other surface side of the sheet laminate and puts it in a pressurized state,
The support member has a slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser light can pass from the support member side,
When the opening is viewed in cross section, both ends of the support member that form the slit-shaped opening are provided with a taper in which the distance between them is larger on the irradiation head side than on the pressing member side. And
The belt-shaped sheet laminate in a pressurized state by the pressing member is divided by irradiating the laser beam condensed from the support member side along the slit-shaped opening, and the edge of the division is divided. An apparatus for manufacturing a sheet fusion body, in which a plurality of sheet fusion bodies having the seal edge are continuously manufactured by fusing in an overlapping state.
＜２＞
　前記支持部材の各前記端部のテーパー角度（θ）、搬送されている前記帯状のシート積層体に照射される前記レーザー光の焦点での垂線と該焦点及び前記照射ヘッドの前記レンズの中心を結ぶ仮想線とのなす照射角度の最大値（θ１）、並びに前記照射ヘッドの前記レンズにより集光されるレーザー光の集光角度（θ２）の関係が、θ＞θ１＋θ２／２である前記＜１＞記載のシート融着体の製造装置。
＜３＞
　前記支持部材の前記両端部のテーパーは、互いの間隔が前記押さえ部材側から前記照射ヘッド側に向かって漸次広がるように形成されている前記＜１＞又は＜２＞に記載のシート融着体の製造装置。
＜４＞
　照射角度の最大値（θ１）は、０°以上４５°以下であることが好ましく、０°以上４０°以下であることが更に好ましい前記＜１＞～＜３＞の何れか１に記載のシート融着体の製造装置。
＜５＞
　レーザー光の集光角度（θ２）は、０°以上３０°以下であることが好ましく、０．１°以上２０°以下であることが更に好ましい前記＜１＞～＜４＞の何れか１に記載のシート融着体の製造装置。
＜６＞
　前記支持部材の各前記端部のテーパー角度（θ）は、０°より大きいことが好ましく、５°以上であることが更に好ましく、該テーパー角度（θ）の上限値は、８５°程度であることが好ましい前記＜１＞～＜５＞の何れか１に記載のシート融着体の製造装置。
＜７＞
　前記スリット状の開口部には、前記押さえ部材側とは反対側に凸のシリンドリカルレンズが、前記搬送方向と直交する方向に延在して配されており、該シリンドリカルレンズにより、前記開口部に向かって照射されたレーザー光を、前記開口部の搬送方向中心に屈折させるようにして前記帯状のシート積層体に入射させる前記＜１＞～＜６＞の何れか１に記載のシート融着体の製造装置。
＜８＞
　前記シリンドリカルレンズは、半円柱状のレンズである前記＜７＞に記載のシート融着体の製造装置。
＜９＞
　前記支持部材は、回転軸周りに回転する環状の支持部材であり、該環状の支持部材の外周面に前記帯状のシート積層体が巻き掛けられて搬送される前記＜１＞～＜８＞の何れか１に記載のシート融着体の製造装置。
＜１０＞
　前記押さえ部材は、無端状の加圧ベルトである前記＜１＞～＜９＞の何れか１に記載のシート融着体の製造装置。
＜１１＞
　前記支持部材の外周面に巻き掛ける前記押さえ部材の張力を増減調整できる張力調整機構を備え、該張力の調整により、該支持部材と該押さえ部材とによって、前記シート積層体に加える圧力を適宜調整することができる前記＜１＞～＜１０＞の何れか１に記載のシート融着体の製造装置。 <2>
The taper angle (θ) of each end of the support member, the perpendicular at the focal point of the laser beam irradiated on the belt-shaped sheet laminate being conveyed, the focal point, and the center of the lens of the irradiation head The relationship between the maximum value (θ1) of the irradiation angle formed by the connecting virtual line and the condensing angle (θ2) of the laser light condensed by the lens of the irradiation head is <1 where θ> θ1 + θ2 / 2. > An apparatus for producing the sheet fusion product according to the description.
<3>
The sheet fusion body according to <1> or <2>, wherein the taper at the both end portions of the support member is formed so that a distance from each other gradually increases from the pressing member side toward the irradiation head side. Manufacturing equipment.
<4>
The maximum value (θ1) of the irradiation angle is preferably 0 ° or greater and 45 ° or less, and more preferably 0 ° or greater and 40 ° or less. The sheet according to any one of the above items <1> to <3> Fusion production equipment.
<5>
The condensing angle (θ2) of the laser beam is preferably 0 ° or more and 30 ° or less, and more preferably 0.1 ° or more and 20 ° or less. Any one of the above items <1> to <4> The manufacturing apparatus of the sheet fusion body of description.
<6>
The taper angle (θ) of each end of the support member is preferably larger than 0 °, more preferably 5 ° or more, and the upper limit of the taper angle (θ) is about 85 °. Preferably, the apparatus for producing a sheet fusion body according to any one of <1> to <5>.
<7>
In the slit-shaped opening, a cylindrical lens convex on the side opposite to the pressing member side is arranged to extend in a direction perpendicular to the transport direction, and the cylindrical lens causes the opening to be disposed in the opening. The sheet fusion body according to any one of <1> to <6>, wherein the laser beam irradiated toward the center is incident on the belt-shaped sheet laminate so as to be refracted toward the center of the opening in the conveyance direction. Manufacturing equipment.
<8>
The said cylindrical lens is a manufacturing apparatus of the sheet fusion body as described in said <7> which is a semi-cylindrical lens.
<9>
The support member is an annular support member that rotates about a rotation axis, and the belt-shaped sheet laminate is wound around and transported around the outer peripheral surface of the annular support member. The manufacturing apparatus of the sheet fusion body of any one.
<10>
The sheet fusion body manufacturing apparatus according to any one of <1> to <9>, wherein the pressing member is an endless pressure belt.
<11>
A tension adjusting mechanism that can increase or decrease the tension of the pressing member wound around the outer peripheral surface of the supporting member is provided, and by adjusting the tension, the pressure applied to the sheet laminate is appropriately adjusted by the supporting member and the pressing member. The apparatus for producing a sheet fusion body according to any one of <1> to <10>, which can be performed.
＜１２＞
　前記照射ヘッドは、前記環状の支持部材の回転軸中心の位置からずれて配されている前記＜９＞に記載のシート融着体の製造装置。
＜１３＞
　前記スリット状の開口部の円筒ロールの周方向に沿った長さである幅Ｗに対する、前記帯状のシート積層体におけるレーザー光のスポットの直径φの比（φ／Ｗ）は、好ましくは０．０５以上、更に好ましくは０．１以上、特に好ましくは０．４以上、そして、好ましくは８以下、更に好ましくは７以下、特に好ましくは２以下、より具体的には、好ましくは０．０５～８、更に好ましくは０．１～７、特に好ましくは０．４～２である前記＜１＞～＜１２＞の何れか１に記載のシート融着体の製造装置。
＜１４＞
　前記スリット状の開口部の円筒ロールの周方向に沿った長さである幅Ｗは０．１～４．０ｍｍである前記＜１＞～＜１３＞の何れか１に記載のシート融着体の製造装置。
＜１５＞
　前記支持部材は、その被加工物との当接面に凹部を有し、該凹部は、円筒状の該支持部材の周方向に所定間隔を置いて複数形成されており、隣接する２つの該凹部間に位置する領域に、前記スリット状の開口部が形成されている前記＜１＞～＜１４＞の何れか１に記載のシート融着体の製造装置。
＜１６＞
　請求項＜１＞～＜１５＞の何れか１項に記載のシート融着体の製造装置を用いて、
　あらかじめ別途製造された帯状のシート積層体に対して、レーザー光を照射して、一対のサイドシール部を有する外装体を具備するパンツ型使い捨ておむつを連続的に製造するパンツ型使い捨ておむつの製造装置。
＜１７＞
　複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法であって、
　前記複数枚のシートの少なくとも一部のシートは樹脂材を含み、
　前記複数枚のシートが重ねられた帯状のシート積層体の一方の面を、集光されたレーザー光が通過可能な、該シート積層体の幅方向に長いスリット状の開口部を有する支持部材に当接させて加圧状態となりながら搬送される該帯状のシート積層体に対して、該支持部材側から該スリット状の開口部に沿って、該シート積層体を構成するシートに吸収され該シートを発熱させる発振波長のレーザー光を照射ヘッドから照射することにより、該帯状のシート積層体を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシートの切断縁部どうしを融着させて前記シール縁部を形成するシール縁部形成工程を有し、
　前記シール縁部形成工程は、前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部それぞれに、互いの間隔が前記帯状のシート積層体側よりも前記照射ヘッド側の方が広がるテーパーを設けて行うシート融着体の製造方法。
＜１８＞
　前記照射ヘッドは、レーザー光を集光するレンズを有し、
　前記支持部材の各前記端部のテーパーは、そのテーパー角度（θ）、搬送されている前記帯状のシート積層体に照射される前記レーザー光の焦点での垂線と該焦点及び前記照射ヘッドの前記レンズの中心を結ぶ仮想線とのなす照射角度の最大値（θ１）、並びに前記照射ヘッドの前記レンズにより集光されるレーザー光の集光角度（θ２）の関係が、θ＞θ１＋θ２／２である前記＜１７＞に記載のシート融着体の製造方法。
＜１９＞
　前記支持部材の各前記端部のテーパーは、互いの間隔が前記帯状のシート積層体側から前記照射ヘッド側に向かって漸次広がるように形成されている前記＜１７＞又は＜１８＞に記載のシート融着体の製造方法。 <12>
The apparatus for manufacturing a sheet fusion body according to <9>, wherein the irradiation head is arranged so as to be shifted from a position of a center of a rotation axis of the annular support member.
<13>
The ratio (φ / W) of the diameter φ of the laser beam spot in the strip-shaped sheet laminate to the width W, which is the length of the slit-shaped opening along the circumferential direction of the cylindrical roll, is preferably 0.00. 05 or more, more preferably 0.1 or more, particularly preferably 0.4 or more, and preferably 8 or less, more preferably 7 or less, particularly preferably 2 or less, more specifically preferably 0.05 to 8. The apparatus for producing a sheet fusion body according to any one of <1> to <12>, more preferably 0.1 to 7, and particularly preferably 0.4 to 2.
<14>
The sheet fusion body according to any one of <1> to <13>, wherein a width W of the slit-shaped opening along the circumferential direction of the cylindrical roll is 0.1 to 4.0 mm. Manufacturing equipment.
<15>
The support member has a recess on the contact surface with the workpiece, and the recess is formed in a plurality at predetermined intervals in the circumferential direction of the cylindrical support member. The apparatus for producing a sheet fusion body according to any one of <1> to <14>, wherein the slit-shaped opening is formed in a region located between the recesses.
<16>
Using the apparatus for producing a sheet fusion body according to any one of claims <1> to <15>,
An apparatus for manufacturing a pants-type disposable diaper that continuously manufactures a pants-type disposable diaper having an exterior body having a pair of side seal portions by irradiating a belt-shaped sheet laminate separately manufactured in advance with a laser beam. .
<17>
A method for producing a sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets are overlapped,
At least a part of the plurality of sheets includes a resin material,
A support member having a slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser beam can pass through one surface of the belt-like sheet laminate in which the plurality of sheets are stacked. With respect to the belt-shaped sheet laminate that is conveyed while being brought into contact with pressure, the sheet is absorbed by the sheet constituting the sheet laminate along the slit-shaped opening from the support member side. By irradiating a laser beam having an oscillation wavelength that generates heat from the irradiation head, the strip-shaped sheet laminate is divided at the same time, and the cut edges of the plurality of sheets in the pressurized state generated by the division are separated from each other. A seal edge forming step of forming the seal edge by fusing
In the sealing edge forming step, the irradiation head has a space between the both ends of the support member that forms the slit-shaped opening in cross-section and is closer to the belt-shaped sheet laminate than the belt-shaped sheet laminate. A method for producing a sheet fusion product, which is performed by providing a taper that widens on the side.
<18>
The irradiation head has a lens that collects laser light;
The taper at each end of the support member has a taper angle (θ), a perpendicular at the focal point of the laser beam irradiated on the belt-shaped sheet laminate being conveyed, the focal point, and the focal point of the irradiation head. The relationship between the maximum value (θ1) of the irradiation angle formed by the virtual line connecting the centers of the lenses and the condensing angle (θ2) of the laser light collected by the lens of the irradiation head is θ> θ1 + θ2 / 2. The method for producing a fused sheet according to <17>.
<19>
The sheet according to <17> or <18>, wherein the taper at each of the end portions of the support member is formed such that a distance between the support members gradually increases from the belt-shaped sheet laminate side toward the irradiation head side. A method for producing a fused body.
＜２０＞
　前記シール縁部形成工程は、レーザー光の照射を前記スリット状の開口部に配されたシリンドリカルレンズを介して行い、該シリンドリカルレンズにより、前記開口部に向かって照射されたレーザー光を、前記開口部の搬送方向中心に屈折させるようにして前記帯状のシート積層体に入射させる前記＜１７＞～＜１９＞の何れか１に記載のシート融着体の製造方法。
＜２１＞
　前記シール縁部形成工程は、前記支持部材に当接している前記帯状のシート積層体の他方の面から押さえ部材を用いて押し付け加圧状態とし、加圧状態の該帯状のシート積層体に対して、該支持部材側から前記スリット状の開口部に沿って、レーザー光を照射する前記＜１７＞～＜２０＞の何れか１に記載のシート融着体の製造方法。
＜２２＞
　前記シール縁部形成工程に用いる前記支持部材は、回転軸周りに回転する環状の支持部材であり、該環状の支持部材の外周面に前記帯状のシート積層体を巻き掛けて搬送する前記＜１７＞～＜２１＞の何れか１に記載のシート融着体の製造方法。
＜２３＞
　前記支持部材に当接している帯状のシート積層体の支持部材との当接面である一方の面とは反対側の面）に、押さえ部材を押し付け、加圧状態とする前記＜１７＞～＜２２＞の何れか１に記載のシート融着体の製造方法。
＜２４＞
　前記シール縁部形成工程に用いる前記照射ヘッドは、前記環状の支持部材の回転軸中心の位置からずれて配されている前記＜２２＞に記載のシート融着体の製造方法。
＜２５＞
　前記帯状のシート積層体は、樹脂材としてポリエチレン、ポリエチレンテレフタレート、又は、ポリプロピレンの熱融着性の合成樹脂を含む前記＜１７＞～＜２４＞の何れか１に記載のシート融着体の製造方法。
＜２６＞
　前記帯状のシート積層体は、不織布、フィルム、又は、不織布とフィルムとのラミネートシートを有する前記＜１７＞～＜２５＞の何れか１に記載のシート融着体の製造方法。
＜２７＞
　前記不織布としては、エアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、又は、メルトブローン不織布である前記＜１７＞～＜２６＞の何れか１に記載のシート融着体の製造方法。
＜２８＞
　一回のレーザー光の照射で、前記帯状のシート積層体の分断と、その分断によって生じた２箇所の加圧状態にあるシートの切断縁部どうしの融着とを同時に実施する前記＜１７＞～＜２７＞の何れか１に記載のシート融着体の製造方法。
＜２９＞
　前記帯状のシート積層体を構成するシートが、合成樹脂製の不織布やフィルムである場合、レーザー光としては、ＣＯ2レーザー、ＹＡＧレーザー、半導体レーザー、ＹＶＯ4レーザー、又は、ファイバーレーザーを用いる前記＜１７＞～＜２８＞の何れか１に記載のシート融着体の製造方法。
＜３０＞
　レーザー光としては、前記帯状のシート積層体を構成するシートが、合成樹脂として、ポリエチレン、ポリエチレンテレフタレート、又は、ポリプロピレンを含む場合、発振波長が８．０μｍ以上１５．０μｍ以下を用いる前記＜１７＞～＜２９＞の何れか１に記載のシート融着体の製造方法。
＜３１＞
　レーザー光としては、ＣＯ2レーザーの発振波長の９．０μｍ以上１１．０μｍ以下を用いる前記＜１７＞～＜３０＞の何れか１に記載のシート融着体の製造方法。 <20>
The seal edge forming step performs laser light irradiation through a cylindrical lens disposed in the slit-shaped opening, and the laser light irradiated toward the opening by the cylindrical lens is applied to the opening. The method for producing a sheet fusion body according to any one of <17> to <19>, wherein the sheet is refracted to the center in the conveyance direction and is incident on the belt-shaped sheet laminate.
<21>
In the sealing edge forming step, a pressing member is used to press and apply pressure from the other surface of the belt-shaped sheet laminate that is in contact with the support member, and the pressure is applied to the belt-shaped sheet stack. The method for producing a sheet fusion body according to any one of <17> to <20>, wherein the laser beam is irradiated along the slit-shaped opening from the support member side.
<22>
The support member used in the seal edge forming step is an annular support member that rotates around a rotation axis, and the belt-like sheet laminate is wound around and transported around the outer peripheral surface of the annular support member. >-<21> The method for producing a fused sheet according to any one of <21>.
<23>
The pressing member is pressed against the surface of the belt-shaped sheet laminate that is in contact with the supporting member, on the side opposite to the one surface that is in contact with the supporting member, so that the pressed state is achieved. <22> The method for producing a sheet fusion body according to any one of the above.
<24>
The method for manufacturing a sheet-fused body according to <22>, wherein the irradiation head used in the seal edge portion forming step is arranged so as to be shifted from a position of a rotation axis center of the annular support member.
<25>
The production of the sheet fusion product according to any one of <17> to <24>, wherein the belt-like sheet laminate includes a heat-fusible synthetic resin of polyethylene, polyethylene terephthalate, or polypropylene as a resin material. Method.
<26>
The method for producing a sheet fusion body according to any one of <17> to <25>, wherein the belt-shaped sheet laminate includes a nonwoven fabric, a film, or a laminate sheet of the nonwoven fabric and the film.
<27>
The method for producing a sheet fusion product according to any one of <17> to <26>, wherein the nonwoven fabric is an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, or a meltblown nonwoven fabric.
<28>
<17> in which the cutting of the belt-shaped sheet laminate and the fusion of the cut edges of the two sheets in a pressurized state generated by the cutting are simultaneously performed by one laser light irradiation. The method for producing a sheet fusion body according to any one of <27>.
<29>
When the sheet constituting the belt-shaped sheet laminate is a synthetic resin nonwoven fabric or film, the laser beam is a CO 2 laser, a YAG laser, a semiconductor laser, a YVO 4 laser, or a fiber laser. The method for producing a fused sheet according to any one of 17> to <28>.
<30>
As a laser beam, when the sheet | seat which comprises the said strip | belt-shaped sheet | seat laminated body contains polyethylene, a polyethylene terephthalate, or a polypropylene as a synthetic resin, the oscillation wavelength uses 8.0 to 15.0 micrometers <17> The method for producing a sheet fusion body according to any one of to <29>.
<31>
The method for producing a sheet-fused body according to any one of <17> to <30>, wherein the laser light has a CO 2 laser oscillation wavelength of 9.0 μm to 11.0 μm.
＜３２＞
　吸収性本体と、該吸収性本体の非肌当接面側に配されて該吸収性本体を固定している外装体とを備え、且つパンツ型使い捨ておむつの腹側部における外装体の両側縁部とパンツ型使い捨ておむつの背側部における該外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、
　前記サイドシール部は、該サイドシール部が形成されていないパンツ型使い捨ておむつの前駆体である加圧状態のおむつ連続体を支持部材で搬送しながら、加圧状態の該おむつ連続体に対して、該支持部材側から該支持部材の有するスリット状の開口部に沿って、レーザー光を照射ヘッドから照射することにより、該おむつ連続体を個々に分断するのと同時に、その分断によって生じた加圧状態にある複数枚のシートの切断縁部どうしを融着して形成されているパンツ型使い捨ておむつ。
＜３３＞
　前記おむつ連続体は、一方の面が前記支持部材に当接し且つ分断予定部分が前記スリット状の開口部上に位置するように、回転する該支持部材上に導入されると共に、他方の面に押さえ部材が押し付けられることによって、搬送されつつ厚み方向に加圧されて加圧状態となっており、前記サイドシール部は、搬送中且つ加圧状態の分断予定部分に対して、おむつ連続体に対しレーザー光が垂直に照射する位置の上流側の位置から下流側の位置を通過することを含む過程において、該支持部材側から該スリット状の開口部に沿ってレーザー光が照射されて形成されている前記＜３２＞に記載のパンツ型使い捨ておむつ。
＜３４＞
　前記おむつ連続体は、原反ロールから連続的に供給される帯状の外層シートと、原反ロールから連続的に供給される帯状の内層シートとの間に、ウェストギャザーを形成するウエスト部弾性部材、胴回りギャザーを形成する胴回り部弾性部材及びレッグギャザーを形成するレッグ部弾性部材を、所定の伸長率に伸長させた伸長状態で各々複数本配することによって形成されている前記＜３２＞又は＜３３＞に記載のパンツ型使い捨ておむつ。
＜３５＞
　一対のニップロールの間に、ウエスト部弾性部材、胴回り部弾性部材及びレッグ部弾性部材を伸長状態で挟み込んだ帯状の外層シート及び帯状の内層シートを送り込んで加圧することにより、該帯状シート間に複数本の弾性部材が伸長状態で配された、前記外装体の前駆体である帯状の外装体を形成する前記＜３２＞～＜３４＞の何れか１に記載のパンツ型使い捨ておむつ。 <32>
An absorbent body and an exterior body arranged on the non-skin contact surface side of the absorbent body and fixing the absorbent body, and both side edges of the exterior body in the abdominal side of the pants-type disposable diaper A pants-type disposable diaper in which a pair of side seal parts, a waist opening part, and a pair of leg openings are formed by joining the outer part and both side edges of the exterior body at the back side part of the pant-type disposable diaper ,
While the said side seal part conveys the pressurized diaper continuous body which is a precursor of the underpants type disposable diaper in which this side seal part is not formed with a support member, with respect to this pressurized diaper continuous body The diaper continuum is individually divided at the same time by irradiating laser light from the irradiation head along the slit-shaped opening of the support member from the support member side, and at the same time, the processing caused by the division A pants-type disposable diaper formed by fusing cut edges of a plurality of sheets in a pressure state.
<33>
The diaper continuous body is introduced onto the rotating support member so that one surface abuts on the support member and a portion to be divided is positioned on the slit-shaped opening, and the other surface is disposed on the other surface. When the pressing member is pressed, it is pressurized in the thickness direction while being transported and is in a pressurized state, and the side seal portion is a continuous diaper against the part that is being transported and scheduled to be divided. On the other hand, in the process including passing from the upstream position to the downstream position of the position where the laser beam is irradiated vertically, the laser beam is irradiated from the support member side along the slit-shaped opening. The pants-type disposable diaper according to <32>.
<34>
The diaper continuum is a waist elastic member that forms a waist gather between a belt-like outer layer sheet continuously supplied from a raw fabric roll and a belt-like inner layer sheet continuously supplied from a raw fabric roll. The <32> or the <32> formed by arranging a plurality of waistline elastic members forming the waistline gathers and a plurality of leg part elastic members forming the leg gathers in an extended state extended to a predetermined extension rate. 33> The pants-type disposable diaper described in 33>.
<35>
By feeding and pressing a belt-like outer layer sheet and a belt-like inner layer sheet sandwiching a waist elastic member, a waistline elastic member, and a leg elastic member in a stretched state between a pair of nip rolls, a plurality of pieces are provided between the belt-like sheets. The pants-type disposable diaper according to any one of the above <32> to <34>, wherein a strip-shaped outer package, which is a precursor of the outer package, is formed by extending an elastic member of a book.
　本発明のシート融着体の製造装置によれば、搬送されている対象物の幅方向にレーザー光を照射して、シートの縁部が重なった状態で融着したシール縁部を有するシート融着体を製造する際に、レーザー光のエネルギーロスを抑えて照射することができる。
  According to the sheet fusion body manufacturing apparatus of the present invention, a sheet fusion having a seal edge portion that is fused in a state in which the edge portions of the sheets are overlapped by irradiating laser light in the width direction of the object being conveyed. When manufacturing the adherend, it is possible to irradiate the laser beam with reduced energy loss.

Claims (36)

  1. 　複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置であって、
    　レーザー光を集光するレンズを有する照射ヘッドと、少なくとも一部に樹脂材を含む複数枚のシートが重ねられた帯状のシート積層体の一方の面を支持しながら搬送する支持部材と、該帯状のシート積層体の他方の面側から該支持部材に該帯状のシート積層体を当接させ加圧状態にする押さえ部材とを具備し、
    　前記支持部材は、集光されたレーザー光が該支持部材側から通過可能な、前記シート積層体の幅方向に長いスリット状の開口部を有しており、
    　前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部には、それぞれ、互いの間隔が前記押さえ部材側よりも前記照射ヘッド側の方が広がるテーパーが設けられており、
    　前記押さえ部材による加圧状態の前記帯状のシート積層体に、前記支持部材側から集光されたレーザー光を前記スリット状の開口部に沿って照射して分断すると共に、この分断の縁部を重なった状態で融着し、前記シール縁部を有するシート融着体を複数個連続的に製造するシート融着体の製造装置。     An apparatus for producing a sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets overlap with each other,
    An irradiation head having a lens for condensing laser light, a support member that conveys while supporting one surface of a belt-shaped sheet laminate in which a plurality of sheets including a resin material at least partially are stacked, and the belt shape A pressing member that brings the belt-shaped sheet laminate into contact with the support member from the other surface side of the sheet laminate and puts it in a pressurized state,
    The support member has a slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser light can pass from the support member side,
    When the opening is viewed in cross section, both ends of the support member that form the slit-shaped opening are provided with a taper in which the distance between them is larger on the irradiation head side than on the pressing member side. And
    The belt-shaped sheet laminate in a pressurized state by the pressing member is divided by irradiating the laser beam condensed from the support member side along the slit-shaped opening, and the edge of the division is divided. An apparatus for manufacturing a sheet fusion body, in which a plurality of sheet fusion bodies having the seal edge are continuously manufactured by fusing in an overlapping state.
  2. 　前記支持部材の各前記端部のテーパー角度（θ）、搬送されている前記帯状のシート積層体に照射される前記レーザー光の焦点での垂線と該焦点及び前記照射ヘッドの前記レンズの中心を結ぶ仮想線とのなす照射角度の最大値（θ１）、並びに前記照射ヘッドの前記レンズにより集光されるレーザー光の集光角度（θ２）の関係が、θ＞θ１＋θ２／２である請求項１記載のシート融着体の製造装置。 The taper angle (θ) of each end of the support member, the perpendicular at the focal point of the laser beam irradiated on the belt-shaped sheet laminate being conveyed, the focal point, and the center of the lens of the irradiation head The relation between the maximum value (θ1) of the irradiation angle formed by the connecting virtual line and the condensing angle (θ2) of the laser beam condensed by the lens of the irradiation head is θ> θ1 + θ2 / 2. The manufacturing apparatus of the sheet fusion body of description.
  3. 　前記支持部材の前記両端部のテーパーは、互いの間隔が前記押さえ部材側から前記照射ヘッド側に向かって漸次広がるように形成されている請求項１又は２に記載のシート融着体の製造装置。 3. The sheet fusion body manufacturing apparatus according to claim 1, wherein the taper of the both end portions of the support member is formed so that a distance between the taper gradually increases from the pressing member side toward the irradiation head side. .
  4. 　照射角度の最大値（θ１）は、０°以上４５°以下である請求項１～３の何れか１項に記載のシート融着体の製造装置。 4. The apparatus for producing a sheet fusion body according to claim 1, wherein the maximum value (θ1) of the irradiation angle is not less than 0 ° and not more than 45 °.
  5. 　レーザー光の集光角度（θ２）は、０°以上３０°以下である請求項１～４の何れか１項に記載のシート融着体の製造装置。 The apparatus for producing a fused sheet according to any one of claims 1 to 4, wherein a condensing angle (θ2) of the laser beam is 0 ° or more and 30 ° or less.
  6. 　前記支持部材の各前記端部のテーパー角度（θ）は、０°より大きい請求項１～５の何れか１項に記載のシート融着体の製造装置。 The apparatus for producing a sheet fusion body according to any one of claims 1 to 5, wherein a taper angle (θ) of each end of the support member is greater than 0 °.
  7. 　前記スリット状の開口部には、前記押さえ部材側とは反対側に凸のシリンドリカルレンズが、前記搬送方向と直交する方向に延在して配されており、該シリンドリカルレンズにより、前記開口部に向かって照射されたレーザー光を、前記開口部の搬送方向中心に屈折させるようにして前記帯状のシート積層体に入射させる請求項１～６の何れか１項に記載のシート融着体の製造装置。 In the slit-shaped opening, a cylindrical lens convex on the side opposite to the pressing member side is arranged to extend in a direction perpendicular to the transport direction, and the cylindrical lens causes the opening to be disposed in the opening. The sheet fused body according to any one of claims 1 to 6, wherein the laser beam irradiated toward the center is incident on the belt-shaped sheet laminate so as to be refracted toward the center of the opening in the conveyance direction. apparatus.
  8. 　前記シリンドリカルレンズは、半円柱状のレンズである請求項７に記載のシート融着体の製造装置。 The sheet fused body manufacturing apparatus according to claim 7, wherein the cylindrical lens is a semi-cylindrical lens.
  9. 　前記支持部材は、回転軸周りに回転する環状の支持部材であり、該環状の支持部材の外周面に前記帯状のシート積層体が巻き掛けられて搬送される請求項１～８の何れか１項に記載のシート融着体の製造装置。 9. The support member according to claim 1, wherein the support member is an annular support member that rotates about a rotation axis, and the belt-shaped sheet stack is wound around the outer peripheral surface of the annular support member and conveyed. The apparatus for producing a sheet fusion body according to item.
  10. 　前記押さえ部材は、無端状の加圧ベルトである請求項１～９の何れか１項に記載のシート融着体の製造装置。 The apparatus for manufacturing a sheet fusion body according to any one of claims 1 to 9, wherein the pressing member is an endless pressure belt.
  11. 　前記支持部材の外周面に巻き掛ける前記押さえ部材の張力を増減調整できる張力調整機構を備え、該張力の調整により、該支持部材と該押さえ部材とによって、前記シート積層体に加える圧力を適宜調整することができる請求項１～１０の何れか１項に記載のシート融着体の製造装置。 A tension adjusting mechanism that can increase or decrease the tension of the pressing member wound around the outer peripheral surface of the supporting member is provided, and by adjusting the tension, the pressure applied to the sheet laminate is appropriately adjusted by the supporting member and the pressing member. The apparatus for producing a sheet fusion body according to any one of claims 1 to 10, which can be performed.
  12. 　前記照射ヘッドは、前記環状の支持部材の回転軸中心の位置からずれて配されている請求項９に記載のシート融着体の製造装置。 The sheet fusion body manufacturing apparatus according to claim 9, wherein the irradiation head is arranged so as to be shifted from a position of a center of a rotation axis of the annular support member.
  13. 　前記スリット状の開口部の円筒ロールの周方向に沿った長さである幅Ｗに対する、前記帯状のシート積層体におけるレーザー光のスポットの直径φの比（φ／Ｗ）は、０．０５以上８以下である請求項１～１２の何れか１項に記載のシート融着体の製造装置。 The ratio (φ / W) of the diameter φ of the laser beam spot in the strip-shaped sheet laminate to the width W, which is the length of the slit-shaped opening along the circumferential direction of the cylindrical roll, is 0.05 or more. The apparatus for producing a fused sheet according to any one of claims 1 to 12, which is 8 or less.
  14. 　前記スリット状の開口部の円筒ロールの周方向に沿った長さである幅Ｗは０．１～４．０ｍｍである請求項１～１３の何れか１項に記載のシート融着体の製造装置。 14. The sheet fusion body according to claim 1, wherein a width W which is a length of the slit-shaped opening along a circumferential direction of the cylindrical roll is 0.1 to 4.0 mm. apparatus.
  15. 　前記支持部材は、その被加工物との当接面に凹部を有し、該凹部は、円筒状の該支持部材の周方向に所定間隔を置いて複数形成されており、隣接する２つの該凹部間に位置する領域に、前記スリット状の開口部が形成されている請求項１～１４の何れか１項に記載のシート融着体の製造装置。 The support member has a recess on the contact surface with the workpiece, and the recess is formed in a plurality at predetermined intervals in the circumferential direction of the cylindrical support member. The sheet fusion body manufacturing apparatus according to any one of claims 1 to 14, wherein the slit-shaped opening is formed in a region located between the recesses.
  16. 　前記支持部材は、前記開口部以外の部分ではレーザー光を通過させない請求項１～１５の何れか１項に記載のシート融着体の製造装置。 The sheet fusion body manufacturing apparatus according to any one of claims 1 to 15, wherein the support member does not allow laser light to pass through a portion other than the opening.
  17. 　請求項１～１６の何れか１項に記載のシート融着体の製造装置を用いて、
    　あらかじめ別途製造された帯状のシート積層体に対して、レーザー光を照射して、一対のサイドシール部を有する外装体を具備するパンツ型使い捨ておむつを連続的に製造するパンツ型使い捨ておむつの製造装置。     Using the apparatus for producing a sheet fusion body according to any one of claims 1 to 16,
    An apparatus for manufacturing a pants-type disposable diaper that continuously manufactures a pants-type disposable diaper having an exterior body having a pair of side seal portions by irradiating a belt-shaped sheet laminate separately manufactured in advance with a laser beam. .
  18. 　複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法であって、
    　前記複数枚のシートの少なくとも一部のシートは樹脂材を含み、
    　前記複数枚のシートが重ねられた帯状のシート積層体の一方の面を、集光されたレーザー光が通過可能な、該シート積層体の幅方向に長いスリット状の開口部を有する支持部材に当接させて加圧状態となりながら搬送される該帯状のシート積層体に対して、該支持部材側から該スリット状の開口部に沿って、該シート積層体を構成するシートに吸収され該シートを発熱させる発振波長のレーザー光を照射ヘッドから照射することにより、該帯状のシート積層体を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシートの切断縁部どうしを融着させて前記シール縁部を形成するシール縁部形成工程を有し、
    　前記シール縁部形成工程は、前記開口部を断面視して、該スリット状の開口部を形成する前記支持部材の両端部それぞれに、互いの間隔が前記帯状のシート積層体側よりも前記照射ヘッド側の方が広がるテーパーを設けて行うシート融着体の製造方法。     A method for producing a sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets are overlapped,
    At least a part of the plurality of sheets includes a resin material,
    A support member having a slit-like opening that is long in the width direction of the sheet laminate, through which the condensed laser beam can pass through one surface of the belt-like sheet laminate in which the plurality of sheets are stacked. With respect to the belt-shaped sheet laminate that is conveyed while being brought into contact with pressure, the sheet is absorbed by the sheet constituting the sheet laminate along the slit-shaped opening from the support member side. By irradiating a laser beam having an oscillation wavelength that generates heat from the irradiation head, the strip-shaped sheet laminate is divided at the same time, and the cut edges of the plurality of sheets in the pressurized state generated by the division are separated from each other. A seal edge forming step of forming the seal edge by fusing
    In the sealing edge forming step, the irradiation head has a space between the both ends of the support member that forms the slit-shaped opening in cross-section and is closer to the belt-shaped sheet laminate than the belt-shaped sheet laminate. A method for producing a sheet fusion product, which is performed by providing a taper that widens on the side.
  19. 　前記照射ヘッドは、レーザー光を集光するレンズを有し、
    　前記支持部材の各前記端部のテーパーは、そのテーパー角度（θ）、搬送されている前記帯状のシート積層体に照射される前記レーザー光の焦点での垂線と該焦点及び前記照射ヘッドの前記レンズの中心を結ぶ仮想線とのなす照射角度の最大値（θ１）、並びに前記照射ヘッドの前記レンズにより集光されるレーザー光の集光角度（θ２）の関係が、θ＞θ１＋θ２／２である請求項１８に記載のシート融着体の製造方法。     The irradiation head has a lens that collects laser light;
    The taper at each end of the support member has a taper angle (θ), a perpendicular at the focal point of the laser beam irradiated on the belt-shaped sheet laminate being conveyed, the focal point, and the focal point of the irradiation head. The relationship between the maximum value (θ1) of the irradiation angle formed by the virtual line connecting the centers of the lenses and the condensing angle (θ2) of the laser light collected by the lens of the irradiation head is θ> θ1 + θ2 / 2. The method for producing a sheet fusion body according to claim 18.
  20. 　前記支持部材の各前記端部のテーパーは、互いの間隔が前記帯状のシート積層体側から前記照射ヘッド側に向かって漸次広がるように形成されている請求項１８又は１９に記載のシート融着体の製造方法。 The sheet fusion body according to claim 18 or 19, wherein the taper at each end of the support member is formed so that a distance between the taper gradually increases from the belt-shaped sheet laminate side toward the irradiation head side. Manufacturing method.
  21. 　前記シール縁部形成工程は、レーザー光の照射を前記スリット状の開口部に配されたシリンドリカルレンズを介して行い、該シリンドリカルレンズにより、前記開口部に向かって照射されたレーザー光を、前記開口部の搬送方向中心に屈折させるようにして前記帯状のシート積層体に入射させる請求項１８～２０の何れか１項に記載のシート融着体の製造方法。 The seal edge forming step performs laser light irradiation through a cylindrical lens disposed in the slit-shaped opening, and the laser light irradiated toward the opening by the cylindrical lens is applied to the opening. The method for producing a sheet fusion body according to any one of claims 18 to 20, wherein the sheet is incident on the belt-shaped sheet laminate so as to be refracted in the center in the conveyance direction.
  22. 　前記シール縁部形成工程は、前記支持部材に当接している前記帯状のシート積層体の他方の面から押さえ部材を用いて押し付け加圧状態とし、加圧状態の該帯状のシート積層体に対して、該支持部材側から前記スリット状の開口部に沿って、レーザー光を照射する請求項１８～２１の何れか１項に記載のシート融着体の製造方法。 In the sealing edge forming step, a pressing member is used to press and apply pressure from the other surface of the belt-shaped sheet laminate that is in contact with the support member, and the pressure is applied to the belt-shaped sheet stack. The method for producing a sheet fusion body according to any one of claims 18 to 21, wherein laser light is irradiated along the slit-shaped opening from the support member side.
  23. 　前記シール縁部形成工程に用いる前記支持部材は、回転軸周りに回転する環状の支持部材であり、該環状の支持部材の外周面に前記帯状のシート積層体を巻き掛けて搬送する請求項１８～２２の何れか１項に記載のシート融着体の製造方法。 The support member used in the seal edge forming step is an annular support member that rotates around a rotation axis, and the belt-shaped sheet laminate is wound around and transported around the outer peripheral surface of the annular support member. The method for producing a fused sheet according to any one of items 1 to 22.
  24. 　前記支持部材に当接している帯状のシート積層体の支持部材との当接面である一方の面とは反対側の面に、押さえ部材を押し付け、加圧状態とする請求項１８～２３の何れか１項に記載のシート融着体の製造方法。 The pressing member is pressed against a surface opposite to one surface, which is a contact surface with the support member of the belt-shaped sheet laminate that is in contact with the support member, so as to be in a pressurized state. The manufacturing method of the sheet fusion body of any one of Claims 1.
  25. 　前記シール縁部形成工程に用いる前記照射ヘッドは、前記環状の支持部材の回転軸中心の位置からずれて配されている請求項２３に記載のシート融着体の製造方法。 24. The method for manufacturing a sheet fusion body according to claim 23, wherein the irradiation head used in the seal edge portion forming step is arranged so as to be shifted from a position of a center of a rotation axis of the annular support member.
  26. 　前記帯状のシート積層体は、樹脂材としてポリエチレン、ポリエチレンテレフタレート、又は、ポリプロピレンの熱融着性の合成樹脂を含む請求項１８～２５の何れか１項に記載のシート融着体の製造方法。 The method for producing a sheet fusion body according to any one of claims 18 to 25, wherein the belt-shaped sheet laminate includes a heat-fusible synthetic resin of polyethylene, polyethylene terephthalate, or polypropylene as a resin material.
  27. 　前記帯状のシート積層体は、不織布、フィルム、又は、不織布とフィルムとのラミネートシートを有する請求項１８～２６の何れか１項に記載のシート融着体の製造方法。 The method for producing a sheet fusion body according to any one of claims 18 to 26, wherein the belt-shaped sheet laminate includes a nonwoven fabric, a film, or a laminate sheet of the nonwoven fabric and the film.
  28. 　前記不織布としては、エアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、又は、メルトブローン不織布である請求項１８～２７の何れか１項に記載のシート融着体の製造方法。 The method for producing a sheet fusion product according to any one of claims 18 to 27, wherein the nonwoven fabric is an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, or a meltblown nonwoven fabric.
  29. 　一回のレーザー光の照射で、前記帯状のシート積層体の分断と、その分断によって生じた２箇所の加圧状態にあるシートの切断縁部どうしの融着とを同時に実施する請求項１８～２８の何れか１項に記載のシート融着体の製造方法。 The laser beam is irradiated once to simultaneously divide the belt-shaped sheet laminate and fuse the cut edges of the two sheets in a pressurized state generated by the division. 28. The method for producing a sheet fusion product according to any one of 28.
  30. 　前記帯状のシート積層体を構成するシートが、合成樹脂製の不織布やフィルムである場合、レーザー光としては、ＣＯ2レーザー、ＹＡＧレーザー、半導体レーザー、ＹＶＯ4レーザー、又は、ファイバーレーザーを用いる請求項１８～２９の何れか１項に記載のシート融着体の製造方法。 When the sheet constituting the belt-shaped sheet laminate is a non-woven fabric or film made of synthetic resin, a CO 2 laser, a YAG laser, a semiconductor laser, a YVO 4 laser, or a fiber laser is used as the laser light. 30. The method for producing a sheet fusion product according to any one of 18 to 29.
  31. 　レーザー光としては、前記帯状のシート積層体を構成するシートが、合成樹脂として、ポリエチレン、ポリエチレンテレフタレート、又は、ポリプロピレンを含む場合、発振波長が８．０μｍ以上１５．０μｍ以下を用いる請求項１８～３０の何れか１項に記載のシート融着体の製造方法。 As the laser beam, when the sheet constituting the belt-shaped sheet laminate includes polyethylene, polyethylene terephthalate, or polypropylene as a synthetic resin, an oscillation wavelength of 8.0 μm to 15.0 μm is used. 30. The method for producing a sheet fusion product according to any one of 30.
  32. 　レーザー光としては、ＣＯ2レーザーの発振波長の９．０μｍ以上１１．０μｍ以下を用いる請求項１８～３１の何れか１項に記載のシート融着体の製造方法。 As the laser beam, the manufacturing method of the sheet melt bonded member according to any one of claims 18 to 31, using the following 9.0μm or 11.0μm in the oscillation wavelength of the CO 2 laser.
  33. 　吸収性本体と、該吸収性本体の非肌当接面側に配されて該吸収性本体を固定している外装体とを備え、且つパンツ型使い捨ておむつの腹側部における外装体の両側縁部とパンツ型使い捨ておむつの背側部における該外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、
    　前記サイドシール部は、該サイドシール部が形成されていないパンツ型使い捨ておむつの前駆体である加圧状態のおむつ連続体を支持部材で搬送しながら、加圧状態の該おむつ連続体に対して、該支持部材側から該支持部材の有するスリット状の開口部に沿って、レーザー光を照射ヘッドから照射することにより、該おむつ連続体を個々に分断するのと同時に、その分断によって生じた加圧状態にある複数枚のシートの切断縁部どうしを融着して形成されているパンツ型使い捨ておむつ。     An absorbent body and an exterior body arranged on the non-skin contact surface side of the absorbent body and fixing the absorbent body, and both side edges of the exterior body in the abdominal side of the pants-type disposable diaper A pants-type disposable diaper in which a pair of side seal parts, a waist opening part, and a pair of leg openings are formed by joining the outer part and both side edges of the exterior body at the back side part of the pant-type disposable diaper ,
    While the said side seal part conveys the pressurized diaper continuous body which is a precursor of the underpants type disposable diaper in which this side seal part is not formed with a support member, with respect to this pressurized diaper continuous body The diaper continuum is individually divided at the same time by irradiating laser light from the irradiation head along the slit-shaped opening of the support member from the support member side, and at the same time, the processing caused by the division A pants-type disposable diaper formed by fusing cut edges of a plurality of sheets in a pressure state.
  34. 　前記おむつ連続体は、一方の面が前記支持部材に当接し且つ分断予定部分が前記スリット状の開口部上に位置するように、回転する該支持部材上に導入されると共に、他方の面に押さえ部材が押し付けられることによって、搬送されつつ厚み方向に加圧されて加圧状態となっており、前記サイドシール部は、搬送中且つ加圧状態の分断予定部分に対して、おむつ連続体に対しレーザー光が垂直に照射する位置の上流側の位置から下流側の位置を通過することを含む過程において、該支持部材側から該スリット状の開口部に沿ってレーザー光が照射されて形成されている請求項３３に記載のパンツ型使い捨ておむつ。 The diaper continuous body is introduced onto the rotating support member so that one surface abuts on the support member and a portion to be divided is positioned on the slit-shaped opening, and the other surface is disposed on the other surface. When the pressing member is pressed, it is pressurized in the thickness direction while being transported and is in a pressurized state, and the side seal portion is a continuous diaper against the part that is being transported and scheduled to be divided. On the other hand, in the process including passing from the upstream position to the downstream position of the position where the laser beam is irradiated vertically, the laser beam is irradiated from the support member side along the slit-shaped opening. The pants-type disposable diaper according to claim 33.
  35. 　前記おむつ連続体は、原反ロールから連続的に供給される帯状の外層シートと、原反ロールから連続的に供給される帯状の内層シートとの間に、ウェストギャザーを形成するウエスト部弾性部材、胴回りギャザーを形成する胴回り部弾性部材及びレッグギャザーを形成するレッグ部弾性部材を、所定の伸長率に伸長させた伸長状態で各々複数本配することによって形成されている請求項３３又は３４に記載のパンツ型使い捨ておむつ。 The diaper continuum is a waist elastic member that forms a waist gather between a belt-like outer layer sheet continuously supplied from a raw fabric roll and a belt-like inner layer sheet continuously supplied from a raw fabric roll. The waistline part elastic member forming the waistline gather and the leg part elastic member forming the leg gather are formed by arranging a plurality of each in an extended state extended to a predetermined extension rate. Pants-type disposable diapers as described.
  36. 　一対のニップロールの間に、ウエスト部弾性部材、胴回り部弾性部材及びレッグ部弾性部材を伸長状態で挟み込んだ帯状の外層シート及び帯状の内層シートを送り込んで加圧することにより、該帯状シート間に複数本の弾性部材が伸長状態で配された、前記外装体の前駆体である帯状の外装体を形成する請求項３３～３５の何れか１項に記載のパンツ型使い捨ておむつ。 By feeding and pressing a belt-like outer layer sheet and a belt-like inner layer sheet sandwiching a waist elastic member, a waistline elastic member, and a leg elastic member in a stretched state between a pair of nip rolls, a plurality of pieces are provided between the belt-like sheets. The pants-type disposable diaper according to any one of claims 33 to 35, wherein a strip-shaped outer package, which is a precursor of the outer package, is formed by extending a plurality of elastic members.
PCT/JP2014/066921 2013-06-28 2014-06-26 Device for producing fused sheet body, and method for producing fused sheet body WO2014208636A1 (en)

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* Cited by examiner, † Cited by third party
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WO2017160899A1 (en) * 2016-03-15 2017-09-21 The Procter & Gamble Company Method and apparatus for manufacturing an absorbent article including an ultra short pulse laser source
US10390998B2 (en) 2014-11-07 2019-08-27 The Procter & Gamble Company Process and apparatus for manufacturing an absorbent article using a laser source
US10806635B2 (en) 2016-03-15 2020-10-20 The Procter & Gamble Company Methods and apparatuses for separating and positioning discrete articles
WO2021044786A1 (en) * 2019-09-02 2021-03-11 花王株式会社 Workpiece manufacturing method and manufacturing device, and fused-sheet body manufacturing method and manufacturing device
CN114654085A (en) * 2022-04-16 2022-06-24 绍兴豪春纺织科技有限公司 Supporting structure of nickel screen of laser screen making machine

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US10369661B2 (en) 2015-02-25 2019-08-06 Technology Research Association For Future Additive Manufacturing Optical processing head, optical machining apparatus, and optical processing method
JP6588752B2 (en) * 2015-07-06 2019-10-09 花王株式会社 Belt driving device, sheet conveying device including belt driving device, sheet conveying method using the conveying device, sheet processing device, and sheet processing method using the processing device
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JP6607649B2 (en) * 2017-09-01 2019-11-20 株式会社ワイヤード Laser processing apparatus, laser processing method, and thin plate processed using the same
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0856988A (en) * 1994-08-26 1996-03-05 Toyo Eizai Kk Manufacture of disposable shorts
JP2010131833A (en) * 2008-12-03 2010-06-17 Kao Corp Method and device for processing sheet
JP2011131556A (en) * 2009-12-25 2011-07-07 Kao Corp Sheet welding method, manufacturing method for sheet welded product, and laser bonding device
JP2012126130A (en) * 2010-11-22 2012-07-05 Kao Corp Method of manufacturing sheet fused body
JP2013126528A (en) * 2011-11-15 2013-06-27 Kao Corp Method for producing underpants-type wearing article

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001267334B2 (en) * 2000-06-28 2006-06-01 Coloplast A/S Method for welding components of a multi-layer construction
WO2012070462A1 (en) * 2010-11-22 2012-05-31 花王株式会社 Method for producing body with fused sheets, and body with fused sheets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0856988A (en) * 1994-08-26 1996-03-05 Toyo Eizai Kk Manufacture of disposable shorts
JP2010131833A (en) * 2008-12-03 2010-06-17 Kao Corp Method and device for processing sheet
JP2011131556A (en) * 2009-12-25 2011-07-07 Kao Corp Sheet welding method, manufacturing method for sheet welded product, and laser bonding device
JP2012126130A (en) * 2010-11-22 2012-07-05 Kao Corp Method of manufacturing sheet fused body
JP2013126528A (en) * 2011-11-15 2013-06-27 Kao Corp Method for producing underpants-type wearing article

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10390998B2 (en) 2014-11-07 2019-08-27 The Procter & Gamble Company Process and apparatus for manufacturing an absorbent article using a laser source
WO2017160899A1 (en) * 2016-03-15 2017-09-21 The Procter & Gamble Company Method and apparatus for manufacturing an absorbent article including an ultra short pulse laser source
US10806635B2 (en) 2016-03-15 2020-10-20 The Procter & Gamble Company Methods and apparatuses for separating and positioning discrete articles
WO2021044786A1 (en) * 2019-09-02 2021-03-11 花王株式会社 Workpiece manufacturing method and manufacturing device, and fused-sheet body manufacturing method and manufacturing device
JP7289244B2 (en) 2019-09-02 2023-06-09 花王株式会社 Method and apparatus for processing workpiece, and method and apparatus for manufacturing sheet fused body
CN114654085A (en) * 2022-04-16 2022-06-24 绍兴豪春纺织科技有限公司 Supporting structure of nickel screen of laser screen making machine
CN114654085B (en) * 2022-04-16 2024-02-06 绍兴豪春纺织科技有限公司 Nickel screen supporting structure of laser net making machine

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