WO2012070462A1 - Procédé pour la production d'un corps présentant des feuilles fusionnées et corps présentant des feuilles fusionnées - Google Patents

Procédé pour la production d'un corps présentant des feuilles fusionnées et corps présentant des feuilles fusionnées Download PDF

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Publication number
WO2012070462A1
WO2012070462A1 PCT/JP2011/076511 JP2011076511W WO2012070462A1 WO 2012070462 A1 WO2012070462 A1 WO 2012070462A1 JP 2011076511 W JP2011076511 W JP 2011076511W WO 2012070462 A1 WO2012070462 A1 WO 2012070462A1
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WO
WIPO (PCT)
Prior art keywords
sheet
fusion
sheets
fused
pressing member
Prior art date
Application number
PCT/JP2011/076511
Other languages
English (en)
Japanese (ja)
Inventor
康至 今井
海老原　明浩
真 小久保
伸二 浜本
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010260325A external-priority patent/JP2012111076A/ja
Priority claimed from JP2011246780A external-priority patent/JP5912431B2/ja
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201180055438.4A priority Critical patent/CN103221195B/zh
Publication of WO2012070462A1 publication Critical patent/WO2012070462A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/066—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks
    • B23K26/0661—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks disposed on the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/244—Overlap seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/324—Bonding taking account of the properties of the material involved involving non-metallic parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • 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
    • 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
    • B29C65/1651—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined radiating the edges of holes or perforations
    • 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
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7437—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a perforating tool
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83435—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts said rollers, cylinders or drums being hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/40—Paper
    • 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
    • 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
    • B29C65/1687—Laser beams making use of light guides
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to a method for producing a sheet fusion body and a sheet fusion body in which a plurality of sheets are laminated and partially fused.
  • a method is described in which a body is pressurized from the first member side by a pressing member having a plurality of through holes, and laser light is irradiated from the pressing member side to weld the first and second members.
  • the portion pressed by the pressing member can be welded while the first member and the second member are pressed against each other by the pressing member.
  • Patent Document 4 describes a surface sheet that has an upper layer nonwoven fabric and a lower layer nonwoven fabric, and is formed such that a three-dimensional opening surrounded by both nonwoven fabrics protrudes toward the lower layer nonwoven fabric side. .
  • this surface sheet has a protruding portion on the lower nonwoven fabric side, for reasons of touch and appearance, on the structure of the product, the lower nonwoven fabric side is not in contact with the eyes, for example, on the surface of the absorbent body of sanitary goods.
  • JP 2010-188629 A Japanese Patent Laid-Open No. 2005-231144 JP 2008-86495 A JP 2006-128981 A
  • the sheets are joined together. May be joined in a predetermined pattern. In such a case, in some cases, it is better that the arrangement of the joint portion appears in the appearance of the obtained sheet fusion body from the viewpoint of making the consumer recognize the aesthetic appearance or the presence of a specific function. Further, when the sheet fusion product is used for manufacturing a product that is used by applying it to the skin such as sanitary goods, it is desired that the touch is also good.
  • Patent Document 2 is a technique that basically eliminates uneven irradiation of laser light and joins the first member and the second member throughout the laser light irradiation range. Further, this is a technique of welding the first member and the second member at the interface between them with a laser beam transmitted through the first member, and there is no idea that the arrangement of the welded portion is expressed in appearance. Further, since heat is generated and welded at the interface between the members, it is difficult to visually recognize the formation of the pressing member pattern on the surface of the member, and welding is also performed at the interface until the melted member is solidified within the interface. Formation of the pattern is difficult.
  • the present invention relates to a method for manufacturing a sheet fusion body, in which the fusion parts between the sheets are arranged in a predetermined state, and a sheet fusion body in which the arrangement of the fusion parts is easily visible can be produced.
  • the present invention relates to providing a sheet fusion body that can eliminate the drawbacks of the above-described conventional technology.
  • the present invention is a method for producing a sheet fusion body, which obtains a sheet fusion body in which sheets in a sheet laminate are fused by irradiating a laser beam onto a sheet lamination body in which a plurality of sheets are stacked. Then, a pressing member having a plurality of through holes formed in a predetermined pattern is brought into contact with one surface of the sheet laminate, and the one surface is brought into contact with the sheet laminate in this state from the pressing member side. By irradiating a laser beam having a wavelength which is absorbed by the constituting sheet and generates heat, a sheet fusion sheet in which the fused portions of the sheets are formed in a pattern corresponding to the formation pattern of the through holes is obtained.
  • the present invention provides a method for producing a fused body (hereinafter referred to as the first invention when referring to the first invention).
  • this invention provides the manufacturing method of an absorbent article including the process of manufacturing a sheet fusion body by the manufacturing method of the said sheet fusion body (Hereafter, this invention is referred to as 2nd invention.) Say).
  • the present invention is a sheet-fused body (laminated sheet) in which a plurality of sheets are laminated and partially fused, and a plurality of through holes are formed on the inner peripheral surface of the through holes.
  • a fused portion in which a plurality of sheets are fused is formed, the fused portion is formed at a position spaced from one surface of the laminated sheet, and the opening peripheral edge of the through hole is
  • the present invention provides a sheet-fused body (laminated sheet) that does not protrude from the other surface of the laminated sheet (hereinafter referred to as the third invention).
  • FIG. 1 is a diagram showing a laser-type bonding apparatus suitably used for carrying out the present invention (first and second inventions).
  • FIG. 2 is an explanatory view for explaining a state in which a fused portion is formed in the sheet laminate using the laser type bonding apparatus of FIG.
  • FIG. 3 is an enlarged perspective view showing a part of the sheet fusion product obtained by the present invention (first invention).
  • FIG. 4 is a diagram showing a modification of the apparatus shown in FIG.
  • FIG. 5 is a diagram showing a second laser-type bonding apparatus suitably used for carrying out the present invention (first and second inventions).
  • FIG. 6 is a diagram showing a modification of the apparatus shown in FIG. FIG.
  • FIG. 7 is a perspective view showing a pants-type disposable diaper manufactured using the method of the present invention (first and second inventions).
  • FIG. 8 is a cross-sectional view showing an example of a heating tool for body warming manufactured using the method of the present invention (first and second inventions).
  • FIG. 9 is an enlarged perspective view showing a part of a sheet fusion body (laminated sheet) according to an embodiment of the present invention (third invention).
  • FIG. 10 is a cross-sectional view in the Y direction orthogonal to the X direction of the sheet fusion body in FIG. 9.
  • FIG. 11 is an explanatory diagram showing a state in which a through-hole having a fused portion is formed using a laser beam in a sheet laminate obtained by stacking a plurality of sheets.
  • FIG. 12 is a view showing a laser-type bonding apparatus preferably used for manufacturing the sheet fusion product of the present invention (third invention).
  • FIG. 13 is a schematic view showing a perforating apparatus suitably used for manufacturing the sheet fusion product of the present invention (third invention).
  • FIG. 14 is an enlarged cross-sectional view along the roll axis length direction of the punching section in the punching apparatus shown in FIG.
  • FIG. 15 is a photomicrograph showing the sheet fusion product obtained in Example 1.
  • the endless pressing member 3 is pressed against the sheet laminate 1 while continuously transporting the belt-like sheet laminate 1.
  • laser light is irradiated to continuously form the belt-shaped sheet fusion product 5.
  • the belt-shaped sheet stack 1 is sandwiched between the transport roll 2 and the endless pressing member 3 and pressed in the stacking direction, and the sheet stack under the state is pressed.
  • the sheet fusion body 5 in which the sheets in the sheet laminate 1 are fused in a predetermined pattern is continuously manufactured.
  • the laser bonding apparatus 10 used in the first embodiment will be described.
  • the laser bonding apparatus 10 includes a transport roll 2 that is rotationally driven in the direction of arrow A and a pressure belt 32 as shown in FIG.
  • a belt-type pressure device 31 is provided.
  • the belt-type pressure device 31 includes an endless pressure belt 32 and three rolls 33a, 33b, and 33c that rotate in a state where the pressure belt 32 is bridged.
  • the pressure belt 32 of the belt type pressure device 31 is the pressing member 3 in this embodiment.
  • the pressure belt 32 rotates at least one of the rolls 33a, 33b, and 33c and moves at the same speed as the transport roll 2.
  • it is preferable that the conveyance roll 2 and the pressure belt 32 maintain temperature in a predetermined temperature range by air cooling, water cooling, or the like.
  • the laser-type bonding apparatus 10 includes an interval adjustment mechanism that can increase or decrease the interval between the pressure belt 32 and the conveyance roll 2, and the sheet stack 1 by the pressure belt 32 and the conveyance roll 2 by adjusting the interval.
  • the pressure applied to can be adjusted as appropriate.
  • the sheet laminate 1 is introduced onto the peripheral surface of the transport roll 2 by a guide roll (not shown) and conveyed so as to be wound around the transport roll 2, and then the transport roll 2 by a lead roll and a nip roll (not shown). Get away from the circumference. In this way, by transporting the sheet laminate 1 so as to be wound around the transport roll 2, the sheet laminate 1 can be more efficiently compressed when the sheet laminate 1 includes a nonwoven fabric or the like. Can do.
  • the rotation angle of the transport roll 2 from when the sheet laminate 1 is introduced onto the peripheral surface of the transport roll 2 until it leaves the peripheral surface can be, for example, 90 to 270 degrees, and more preferably 120 to 270 degrees.
  • the angle range in which the sheet stack 1 is pressed against the peripheral surface of the transport roll 2 by the pressure belt 32 is 10 degrees when 360 degrees is set for press contact over the entire circumference of the transport roll 2. It is preferable that it is above, more preferably 30 degrees or more.
  • a mesh belt made of metal or resin, an aperture belt formed by forming a large number of through holes by etching or punching on a metal or resin belt, or the like is used as the pressure belt 32.
  • the mesh belt or the aperture belt as the pressing member 3 transmits the laser beam 4 through the through hole 3a, while the portion 3b other than the through hole 3a does not transmit the laser beam 4.
  • the transport roll 2 may have a peripheral surface that is transparent to the laser light 4 or may have a peripheral surface that is not transparent to the laser light 4.
  • a sheet laminate 1 in which a plurality of sheets are stacked In the method for manufacturing a sheet fusion body of the present embodiment using the laser-type bonding apparatus 10, as shown in FIG. 2 (a), a sheet laminate 1 in which a plurality of sheets are stacked, The sheet 11 that constitutes the surface 1a of the sheet 11 uses a material that absorbs the laser light 4 and generates heat. The sheet other than the sheet 11 may absorb heat with respect to the laser light 4 and generate heat, or may transmit the laser light 4 and hardly generate heat.
  • FIG. 2 shows a sheet laminate 1 in which four sheets that generate heat by absorbing the laser beam 4 are stacked.
  • the plurality of sheets constituting the sheet laminate 1 may be one in which one or a plurality of sheets are laminated on another sheet on the peripheral surface of the transport roll 2.
  • the sheet laminate 1 before being fused by the laser beam 4 may be one in which the layers are not joined at all or may be partially joined by a method other than fusion.
  • a mode in which a portion different from a portion where a fused portion is later formed by laser light is bonded by an adhesive such as a hot melt adhesive is included in the mode in which the portion is bonded by a method other than fusion. Can be mentioned.
  • the laser beam 4 is brought into contact with the surface 1a made of the sheet 11 that absorbs the laser beam 4 and generates heat in the sheet laminate 1, and the sheet laminate in that state.
  • the body 1 is irradiated from the side of the pressing member 3.
  • the plurality of sheets 11, 12, 13 and 14 constituting the sheet laminate 1 are fused to form a through hole formation pattern of the pressing member 3 as shown in FIGS. 2 (c) and 3.
  • the sheet fusion body 5 in which the fusion portions 51, 51,... Are formed in a corresponding pattern is obtained.
  • the laser beam 4 is preferably irradiated so that all the sheets 11 to 14 constituting the sheet laminate 1 are integrated.
  • reference numeral 41 denotes an irradiation head 41 that irradiates a laser beam 4, and is fixed at a specific position spaced apart from the pressure belt 32 that is the pressing member 3 by a predetermined distance.
  • the position of the irradiation head 41 may be provided outside the belt-type pressure device 31 through a mirror that reflects the laser light 4, and the mirror may be fixed at a specific position separated from the pressure belt 32 by a predetermined distance. .
  • FIG. 4 shows a modification of the first embodiment.
  • the pressing member 3 formed of the pressure belt 32 of the belt-type pressure device 31 is opposite to the surface (pressure surface) that presses the sheet laminate 1.
  • a negative pressure space 42 is provided, and laser light 4 is irradiated to the sheet laminate 1 from the side of the pressing member 3 through the negative pressure space 42.
  • a hood 43 that takes in the irradiation head 41 ′ and extends to the vicinity of the pressure belt 32 is provided in a space surrounded by the pressure belt 32, and a decompression device (not shown) such as a suction pump is provided in the hood 43. Is connected to bring the inside of the hood 43 into a negative pressure state.
  • the hood 43 Since the hood 43 is not closed on the pressure belt 32 side (lower end of the hood), it does not affect the irradiation of the laser beam 4.
  • intake air is generated in the vicinity of the pressing belt 32, and the pressing belt 32 and the sheet laminate 1 are cooled, The gas generated by the irradiation with the laser beam 4 can be exhausted.
  • the sheet laminate 1 can be further adhered to the pressure belt 32 that is the pressing member 3, and the formation of the fused portion can be further improved with efficient compression and stable conveyance. it can.
  • the negative pressure state is set in a region where the pressure belt 32 and the sheet laminate 1 are in contact with each other, and the laser is irradiated. It is preferable that the range be larger than the region to be formed.
  • irradiation head 41 'in the laser-type joining apparatus shown in FIG.4 and FIG.6 irradiates the laser beam 4, moving the irradiation point of the laser beam 4 to the moving direction of the sheet laminated body 1, and its orthogonal direction. Accordingly, a large number of fused portions 51 dispersed in the flow direction and the orthogonal direction can be efficiently formed in the sheet laminate 1.
  • reference numeral 44 is a pipe connecting the hood 43 and the pressure reducing device
  • reference numeral 43 a is an exhaust port provided in the vicinity of the lower end of the hood 43.
  • FIG. 5 is a diagram showing a second embodiment of the present invention.
  • the belt-shaped sheet laminate 1 is brought into contact with the cylindrical roll 6 having a through hole, and the endless pressurization from the other surface of the sheet laminate 1 is performed.
  • the belt 34 is pressed in the laminating direction, and the sheet laminate 1 under the state is irradiated with the laser beam 4 from the inside of the cylindrical roll 6 so that the sheets of the sheet laminate 1 are melted in a predetermined pattern.
  • the attached sheet fusion body 5 is continuously manufactured.
  • the cylindrical roll 6 is the pressing member (cylindrical pressing member) 3 in the second embodiment.
  • the laser-type bonding apparatus 10A using the second embodiment will be described.
  • the laser-type bonding apparatus 10A includes a cylindrical roll 6 having a through-hole that is driven to rotate in the direction of arrow A, as shown in FIG.
  • a belt-type pressurizing device 31 ⁇ / b> A including a belt 34 is provided.
  • the belt-type pressure device 31A includes an endless pressure belt 34 and three rolls 33a, 33b, and 33c that rotate while the pressure belt 34 is bridged.
  • the pressure belt 34 rotates at least one of the rolls 33 a, 33 b, and 33 c and moves at the same speed as the cylindrical roll 6.
  • the cylindrical roll 6 and the pressure belt 34 are preferably maintained in a predetermined temperature range by air cooling, water cooling, or the like.
  • the laser-type bonding apparatus 10 ⁇ / b> A has an interval adjustment mechanism that can increase or decrease the interval between the pressure belt 34 and the cylindrical roll 6, and the sheet laminate 1 can be adjusted by the pressure belt 34 and the cylindrical roll 6 by adjusting the interval.
  • the pressure applied to can be adjusted as appropriate.
  • the sheet laminate 1 is introduced onto the circumferential surface of the cylindrical roll 6 by a guide roll (not shown) and conveyed so as to be wound around the cylindrical roll 6, and then the cylindrical roll 6 is drawn by a lead roll and a nip roll (not shown). Get away from the circumference. In this way, by transporting the sheet laminate 1 so as to be wound around the cylindrical roll 6, the sheet laminate 1 can be more efficiently compressed when the sheet laminate 1 includes a nonwoven fabric or the like. Can do.
  • the rotation angle of the cylindrical roll 6 from when the sheet laminate 1 is introduced onto the circumferential surface of the cylindrical roll 6 to the separation from the circumferential surface can be, for example, 90 to 270 degrees, and more preferably 120 to 270 degrees.
  • the angle range in which the sheet laminate 1 is pressed against the circumferential surface of the cylindrical roll 6 by the pressure belt 34 is 10 degrees when 360 degrees is pressed over the entire circumference of the cylindrical roll 6. It is preferable that it is above, more preferably 30 degrees or more.
  • a heat-resistant metal or resin belt that can withstand the heat generated during processing is used, which may or may not have laser beam 4 transparency. May be.
  • the cylindrical roll 6 is made of a metal material such as iron, aluminum, and stainless steel, and a through-hole that is drilled by etching, punching, laser processing, or the like is disposed on a part or the whole of the peripheral surface.
  • the cylindrical roll 6 is rolled into a frame by winding a metal or resin mesh belt or an opening belt formed by forming a large number of through holes on a metal or resin belt by etching or punching. It may be a thing.
  • the arrangement and shape of the through holes provided in the cylindrical roll 6 (cylindrical pressing member) are not particularly limited, and may be determined in consideration of laser specifications, physical properties of the processed member, and the like.
  • the cylindrical roll 6 shown in FIG. 4 has a region where the through holes 6a are arranged at a relatively high density at a plurality of positions in the circumferential direction (more specifically, four equally spaced positions).
  • FIG. 6 shows a modification of the second embodiment.
  • the negative pressure space 42 is provided in the other side of the pressing member 3 which consists of cylindrical rolls 6 to the surface (pressurization surface) which presses the sheet
  • the laser beam 4 is irradiated to the sheet laminate 1 from the holding member 3 side through the negative pressure space 42.
  • a hood 43 that takes in the irradiation head 41 ′ and extends to the vicinity of the inner peripheral surface of the cylindrical roll 6 is provided in the cylindrical roll 6, and a decompression device (not shown) such as a suction pump is connected to the hood 43.
  • a decompression device such as a suction pump
  • the hood 43 Since the hood 43 is not closed on the side close to the inner peripheral surface of the cylindrical roll 6 (the lower end of the hood), the irradiation with the laser beam 4 is not affected.
  • intake air is generated near the inner peripheral surface of the cylindrical roll 6 to cool the cylindrical roll 6 and the sheet laminate 1.
  • the gas generated by the irradiation of the laser beam 4 can be exhausted.
  • the sheet laminate 1 can be further adhered to the cylindrical roll 6 that is the pressing member 3, and the formation of the fused portion can be further improved along with efficient compression and stable conveyance. .
  • the negative pressure state is in the region where the cylindrical roll 6 and the sheet laminate 1 are in contact with each other, and the laser is irradiated. It is preferable that the range be larger than the region to be formed.
  • the one surface 1a of the sheet laminate 1 is absorbed from the laser beam 4 to generate heat. Since the laser beam 4 is irradiated from the sheet 11 side, the fused portion 51 where the sheet 11 and another sheet are fused clearly appears on the obtained sheet fused body 5. Moreover, since the fusion
  • the sheet fusion body 5 in which the fused portions 51 are arranged in various patterns can be obtained by appropriately controlling the range in which the laser beam 4 is irradiated.
  • the fused portion 51 in a pattern corresponding to the formation pattern of the through-holes 3a so as to be clearly shown in the appearance, the aesthetics of the sheet fused body 5 and a product using the same can be improved, Or there exists a merit which can appeal to consumers etc. that a specific function exists in the sheet
  • the merit is not limited to them.
  • the sheet fusion body 5 shown in FIG. 3 uses a mesh belt or an aperture belt in which through holes having a rectangular shape in plan view are formed in multiple rows in both the MD direction and the CD direction as the pressing member 3, and laser light 4 was irradiated with a width corresponding to one row of through holes in series in the MD direction. For this reason, only one row of the fused portions 51 is formed in one direction (MD) of the sheet fusion body 5, but the width of the laser beam 4 is set to two rows of through-hole rows in series in the MD direction. It is also possible to obtain a sheet fusion body 5 having a width, a width corresponding to three rows, or a width larger than that, and a plurality of rows of fusion portions 51 extending in the MD direction.
  • lines in the zigzag form can also be obtained using the aperture belt by which the through-hole is arrange
  • the adjacent fused portions 51 may be non-fused portions in which the sheets are not joined at all, or the weakly fused portions in which the sheets are weakly fused as compared to the fused portions 51. It can also be.
  • each of the through holes 3a of the pressing member 3 has a dimension in the MD and CD directions of 20 mm or less, respectively. It is preferable that it is 5 mm or less.
  • the opening ratio of the pressing member 3 is preferably 40 to 90%, more preferably 60 to 80%.
  • the irradiation of the laser beam 4 is preferably performed on the sheet laminate 1 in a state of being pressed by the pressing member 3 from the viewpoint of reliably fusing the sheets together. Further, as shown in FIG. 2B, the laser beam 4 is irradiated to the sheet laminate 1 in a state of being pressed by the pressing member 3 and compressed in the thickness direction. It is also preferable to release the pressure applied by the member 3.
  • the sheet laminate 1 has a compression recovery property, after the laser beam 4 is irradiated in the compressed state, the sheet laminate 1 is released from the compressed state, so that the sheets can be melted as shown in FIG.
  • the sheet fusion body 5 in which the attaching part 51 becomes a recessed part can be obtained.
  • the sheet fused body 5 is used on the surface of the product that is applied to the skin of a sanitary product or the like. The touch etc. in the case etc. improve.
  • the surface 5 a is the surface 1 a on the side of the sheet laminate 1 irradiated with the laser light
  • the surface 5 b is the opposite surface.
  • the thickness T2 of the sheet laminate 1 when irradiated with the laser beam 4 is preferably 10 to 50%, more preferably, the thickness T1 of the sheet laminate 1 before being compressed by the pressing member 3. Is 20-30%.
  • the thickness T 3 in the fusion part 51 is preferably 10 to 50%, more preferably 20 to 20% with respect to the thickness T 4 of the part other than the fusion part 51. 30%.
  • the thicknesses of T1, T3, and T4 were measured using a scale obtained by photographing a cross section with an optical microscope in an unweighted state.
  • the thickness of ⁇ 2 is determined by measuring the thickness of the pressing member in advance and measuring the pressure on the pressing member that pressurizes the sheet stack based on the height of the surface of the support (such as a table) on which the sheet stack is placed. The displacement was measured with a laser displacement meter, and the thickness of the pressing member was subtracted from the measured relative value.
  • the laser beam applied to the sheet laminate 1 is a 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 wavelength of light.
  • the laser may be a CO 2 laser, YAG laser, LD laser ( (Semiconductor laser), YVO4 laser, fiber laser or the like is preferably used.
  • the sheet contains polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, it is preferable to use, for example, 8.0 to 15 ⁇ m as a wavelength that can be absorbed by the sheet and heat the sheet satisfactorily. It is particularly preferable to use 10.6 ⁇ m of the oscillation wavelength of a CO 2 laser in which a large-capacity laser device exists.
  • a stationary state in which a core-sheath composite fiber having a core part of polyethylene terephthalate and a sheath part of polyethylene is laminated with three spunbond nonwoven fabrics and three air-through nonwoven fabrics, and a total of six nonwoven fabrics.
  • a spot diameter of 3.5 mm or less, a laser output of 21 W or more, and a scanning speed of 210 mm / s or less are preferable.
  • These irradiation conditions are not limited to this because they change depending on the physical properties of the material constituting the laminate, the configuration of the laminate, the pressurization state, and the conveyance speed.
  • the sheet fusion product produced in the present invention can be used as various articles as it is or integrated with other members.
  • various articles include absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads, floor cleaning sheets, body wiping sheets, and the like.
  • the peripheral sheet of the absorbent body includes a surface sheet that forms a skin contact surface of a disposable diaper or a sanitary napkin and a back sheet that forms a non-skin contact surface.
  • a sanitary napkin with a wing part joined by a more extended part a top sheet and a wing part forming sheet, a wing part forming sheet and a back sheet, a top sheet and a wing part forming sheet and a back surface
  • a sheet fused examples include a sheet fused.
  • the sheet contained in the sheet laminate and fused together examples include non-woven fabrics, resin films, fiber webs that have not been made non-woven fabrics, and the like by various manufacturing methods. Moreover, it is preferable that one or both of the two sheets adjacent in the thickness direction include fibers made of a thermoplastic resin.
  • the thermoplastic resin include polyolefin such as polypropylene, polyester such as polyethylene terephthalate, polyamide, and the like, and composite fibers composed of these two or more resins can also be used.
  • the sheet laminate having compression recovery property is preferably a sheet in which at least one of the plurality of sheets has compression recovery property.
  • the sheet having compression recoverability include a fiber assembly sheet having a space between fibers and a urethane foam sheet.
  • the fiber assembly sheet having voids between fibers include non-woven fabrics produced by various production methods, non-woven fabric fiber webs (such as webs formed using a card machine), and the like.
  • an air-through nonwoven fabric, a needle punch nonwoven fabric, or the like in which a web manufactured by a card method or an airlaid method is subjected to an air-through hot air treatment to fuse the intersections of fibers is preferable from the viewpoint of high compression recovery.
  • the method for producing an absorbent article includes the step of producing a sheet fusion product by the method for producing a sheet fusion product of the present invention.
  • the absorbent article is a pants-type disposable diaper 7, and the process of manufacturing the sheet fusion body is performed by folding the sheet member 71 ⁇ / b> A constituting the pants-type exterior body 71 in the width direction.
  • the side seal portions 72, 72 are preferably used for forming a sheet fusion body. By including this step, the side seal portions 72 and 72 that are easy to visually recognize and have a soft feel can be efficiently manufactured.
  • the absorbent article is a sanitary napkin because it is a fused part that has a soft feel
  • the process of manufacturing the sheet fusion product is performed by combining the top sheet and the back sheet with the absorbent interposed therebetween.
  • the heating tool for body heating may equip the manufacturing method of the heating tool for body heating with the process of manufacturing a sheet fusion body by the manufacturing method of the sheet fusion body of this invention.
  • the heating tool for body warming for example, like the heating tool 8 shown in FIG. 8, the heating material 81 has a surface material 82 that is a surface that makes contact with the skin and a back material 83 that becomes a non-skin contact surface. The surface material 82 and the back surface material 83 are joined around the heat generating portion 81.
  • the heating tool 8 shown in FIG. 8 is a heating tool used for eye heating, and further includes ear-hook sheets 84 and 84 for wearing.
  • the ear hanging sheet 84 is, for example, partly bonded to the front surface material 82 or the back surface material 83, or a portion 84a interposed between the front surface material 82 and the back surface material 83, and bonded to them. Let them be integrated.
  • the ear hooking sheet 84 is formed with holes and slits 84a for hooking on the ears. In such a heating tool, it is preferable to use a process of manufacturing a sheet fusion body for joining the front surface material and the back surface material or joining the ear hook sheet.
  • a sheet fusion body (laminated sheet) 105 is formed by laminating a plurality of sheets 111 to 116 and partially fusing them as shown in FIG. It is a multilayer structure sheet. As shown in FIG. 9, a plurality of through holes 151, 151... Are formed in the sheet fusion body 105. The plurality of through-holes 151, 151,... Are arranged in series at a predetermined interval in one direction (X direction) of the sheet fusion body 105 in the planar direction (direction parallel to the surfaces 105a and 105b).
  • FIG. 9 shows only one through-hole row R composed of three or more through-holes 151 in series in the X direction, but the sheet fusion body of the present invention has such a through-hole row R, Only one row may be formed in the direction (Y direction) orthogonal to the direction (X direction) in which the through-hole row extends, or a plurality of rows may be formed. When a plurality of rows are formed, the positions of the through holes 151 in the X direction may be the same or may be shifted between adjacent rows. For example, it may be shifted by a half pitch.
  • the sheet fusion body 105 of the present embodiment is flat on both surfaces 105a and 105b, and the region between the opening of the through hole 151 and the adjacent through hole 151 in the through hole row R is recessed from the both surfaces 105a and 105b. It is. Further, in the sheet fusion body 105 of the present embodiment, the opening peripheral edge portion of the through hole 151 does not protrude from the surfaces 105a and 105b for any of the surfaces 105a and 105b.
  • the opening peripheral edge portion of the through hole 151 with respect to the one surface 105a of the sheet fusion body 105 of the present embodiment is generally the through hole 151 in the plane direction (direction perpendicular to the thickness direction) of the sheet fusion body 105.
  • the peripheral edge of the through hole 151 with respect to the other surface 105b of the sheet fusion body 105 is generally between the inner circumferential surface of the sheet fusion body 105 and the flat portion of the surface 105a. This is a portion between the inner peripheral surface of the through-hole 151 and the flat portion of the surface 105b in the planar direction.
  • the through-hole 151 in the sheet fusion body 105 penetrates the sheet fusion body 105 in the thickness direction (Z direction), and a plurality of sheets are formed on the inner peripheral surface of the through-hole 151.
  • a fused portion 152 is formed by fusing 111 to 116.
  • the fused portion 152 surrounds the periphery of the through hole 151 and is formed over the entire circumference of the inner peripheral surface of the through hole 151.
  • the fused portion 152 only needs to be in a state in which a plurality of sheets 111 to 116 are joined, and does not need to have a complete cylindrical shape.
  • the fused portion 152 is formed by solidifying after all the sheets 111 to 116 constituting the sheet fused body 105 are melted.
  • the fused portion 152 is preferably formed by melting and solidifying one or more of the plurality of sheets 111 to 116 positioned on the inner peripheral surface of the through-hole 151, and melting and solidifying two or more sheets. More preferably, all the sheets are melted and solidified.
  • the fused portion 152 is formed at a position separated from any of the both surfaces 105 a and 105 b of the sheet fusion body 105.
  • the distance d1 (see FIG. 10) from one surface 105a of the sheet fusion body 105 to the fusion part 152 is 5% or more of the thickness t of the sheet fusion body 105 from the viewpoint of improving the touch of the surface 105a.
  • Increasing the distance d1 is to increase the separation between the fused portion 152 and the surface 105a of the sheet fused body 105, but on the other hand, the thickness d3 of the fused portion 152 becomes smaller and denser.
  • the distance d1 is more preferably 10 to 20% of the thickness t of the sheet fusion body 105. From the same viewpoint, the distance d1 is preferably 0.1 mm or more, and more preferably 0.2 to 0.3 mm.
  • the distance d2 (see FIG. 10) from the other surface 105b of the sheet fusion body 105 to the fusion part 152 is 5% or more of the thickness t of the sheet fusion body 105 from the viewpoint of improving the touch of the surface 105b. Preferably, it is 10 to 20% of the same thickness t. From the same viewpoint, the distance d2 is preferably 0.1 mm or more, and more preferably 0.2 to 0.3 mm.
  • the thickness d3 in the thickness direction of the sheet fused body 105 is preferably 30% or more of the thickness t of the sheet fused body 105, and is preferably 50 to 90%. More preferably.
  • the thickness t of the sheet fusion body 105 is measured by a non-contact thickness meter such as a laser displacement meter at a portion that is 10 mm or more away from the through hole 151.
  • the distance d1, the distance d2, and the thickness d3 of the fused part 152 are preferably measured by imaging the cross section of the sheet fused body with a microscope and measuring the image.
  • the sheet fusion product is preferably cut by a laser so that it can be cut in a non-contact manner.
  • the sheet fusion body 105 of the present embodiment is united and integrated by fusing the sheets constituting the sheet fusion body 105 at the fusion part 152 formed on the inner peripheral surface of the through hole 151.
  • the joint strength between the two is high.
  • the sheet fusion body 105 is formed at a position where the fusion part 152 that is likely to be harder than other parts is separated from both surfaces 105 a and 105 b of the sheet fusion body 105. Therefore, the touch of each surface is good. Therefore, for example, when the sheet fusion body 105 is used on a surface of a product used by being applied to the skin such as a sanitary product, the touch or the like is improved.
  • the fusion part 152 may be separated from only one of the both surfaces 105a and 105b.
  • the side where the fusion part 152 is separated from the surface should be used with the side facing the skin.
  • a good touch can be obtained as well.
  • the surface 105a is the surface 101a on the side of the sheet laminate 101 irradiated with the laser light
  • the surface 105b is the opposite surface.
  • the opening peripheral portion of the through-hole 151 does not protrude from the other surface 105b of the sheet fusion body 105. It can be used where there is a possibility that both sides may touch the skin.
  • the size of the through-holes 151 of the sheet fusion body 105 and the interval between the through-holes 151 in the row of through-holes are appropriately determined depending on the use of the sheet fusion body and the bonding strength required for the sheet fusion body.
  • the opening area of the through hole 151 is 0.3 to 10 mm 2 .
  • the opening area of the through hole 151 is larger. Area. The opening area of the through-hole 151 is measured at the end of the fused portion 152 in the thickness direction (Z direction) of the sheet fused body.
  • the sheet fusion body 105 of the present embodiment can be efficiently manufactured by, for example, the following first method or second method.
  • a pressing member in which a plurality of through holes 103a are formed in a predetermined pattern on one surface of a sheet laminate 101 obtained by stacking a plurality of sheets 111 to 116. 103 is brought into contact, and the sheet laminate 101 in that state is irradiated with laser light 104 from the side of the pressing member 103, so that the through-hole 151 having the above-described fused portion 152 is formed in the sheet laminate 101.
  • reference numeral 102 denotes a support that supports the other surface of the sheet laminate 101.
  • FIG. 11 shows a laser-type bonding apparatus 110 that can be preferably used in the first method.
  • the laser bonding apparatus 110 includes a belt-type pressure device 131 including a conveyance roll 102 that is rotationally driven in an arrow A direction and a pressure belt 132.
  • the belt-type pressure device 131 includes an endless pressure belt 132 and three rolls 133a, 133b, and 133c that rotate while the pressure belt 132 is stretched.
  • the pressure belt 132 of the belt type pressure device 131 is the pressing member 103 in the laser type bonding device 110.
  • the pressure belt 132 rotates at least one of the rolls 133 a, 133 b, and 133 c and moves at the same speed as the transport roll 102.
  • the laser-type bonding apparatus 110 has an interval adjustment mechanism that can increase or decrease the interval between the pressure belt 132 and the conveyance roll 102, and the sheet stack 101 by the pressure belt 132 and the conveyance roll 102 by adjusting the interval.
  • the pressure applied to can be adjusted as appropriate.
  • the sheet laminated body 101 is introduced onto the peripheral surface of the transport roll 102 by a guide roll (not shown) and conveyed so as to be wound around the transport roll 102, and then the transport roll 102 by a lead roll and a nip roll (not shown). Get away from the circumference.
  • a mesh belt made of metal or resin, an aperture belt formed by forming a large number of through holes in a metal or resin belt by etching or punching, or the like is used as the pressure belt 132.
  • the mesh belt or the aperture belt as the pressing member 103 transmits the laser beam 104 through the through hole 103 a, while the portion 103 b other than the through hole 103 a does not transmit the laser beam 104.
  • the transport roll 102 may have a peripheral surface that is transparent to the laser beam 104, or may have a peripheral surface that is not transparent to the laser beam 104.
  • a sheet laminated body 101 in which a plurality of sheets are stacked and at least one sheet generates heat by absorbing the laser beam 104 is used.
  • the sheet laminate 101 or the sheet fusion body 105 obtained therefrom it is preferable that all of the plurality of sheets 111 to 116 absorb the laser beam 104 and generate heat.
  • the sheet laminate 101 before being partially fused by the laser beam 104 is partially bonded by a method other than fusion, even if the layers are not bonded at all. Also good.
  • Examples of the mode of being partially joined by a method other than fusion include a mode of being joined by an adhesive such as a hot melt adhesive.
  • the laser beam 104 causes the pressing member 103 to come into contact with one surface 101 a of the sheet laminated body 101 and irradiates the sheet laminated body 101 in that state from the side of the pressing member 103. At this time, the other surface 101 b of the sheet laminate 101 is supported on the outer peripheral surface of the transport roll 102. Further, by controlling the laser output (irradiation intensity) and the irradiation time when irradiating the laser beam 104, the plurality of sheets 111 to 116 constituting the sheet laminate 101 are all penetrated, and the inner A through hole 151 having a fused portion 152 is formed on the peripheral surface.
  • reference numeral 141 denotes an irradiation head 141 that irradiates the laser beam 104, and is fixed at a specific position separated from the pressure belt 132 that is the pressing member 103 by a predetermined distance.
  • the sheet fusion body 105 shown in FIG. 9 uses, for example, a mesh belt or an aperture belt in which through holes having a rectangular shape in plan view are formed in multiple rows in both the MD direction and the CD direction, as the pressing member 103. This is obtained by irradiating the laser beam 104 with a width corresponding to one row of through holes in series in the MD direction. In this case, only one row of through-holes 151 having the fused portions 152 is formed in the machine direction (MD) when the sheet-fused body 105 is manufactured.
  • MD machine direction
  • the width of irradiation with the laser beam 104 is set to the width of two rows of through-hole rows in series in the MD direction, the width of three rows or more, and a through-hole 151 extending in the MD direction is provided. It is also possible to obtain the sheet fusion product 105 formed in a plurality of rows. Moreover, the sheet
  • the individual through-holes 103a of the pressing member 103 each have a dimension in the MD and CD directions of 20 mm or less. It is preferable.
  • the opening ratio of the pressing member 103 is preferably 40 to 90%, more preferably 60 to 80%.
  • the irradiation with the laser beam 104 is preferably performed on the sheet laminated body 101 in a state of being pressed by the pressing member 103 from the viewpoint of forming a fused portion 152 that fits within the thickness of the sheet.
  • the laser beam 104 is irradiated to the sheet laminate 101 in a state of being compressed by the pressing member 103 and compressed in the thickness direction, and after the laser beam irradiation, the pressing member 103 is used. It is also preferable to release the pressure.
  • the laser light applied to the sheet laminate 101 is a wavelength that causes each sheet constituting the sheet laminate to be absorbed by the sheet and generates heat, depends on the material of the sheet and the laser used. It depends on the relationship with the wavelength of light.
  • the laser may be a CO 2 laser, YAG laser, LD laser ( (Semiconductor laser), YVO 4 laser, fiber laser or the like is preferably used.
  • the sheet contains polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, it is preferable to use, for example, 8.0 to 15 ⁇ m as a wavelength that can be absorbed by the sheet and heat the sheet satisfactorily. It is particularly preferable to use 10.6 ⁇ m of the oscillation wavelength of a CO 2 laser in which a large-capacity laser device exists.
  • the sheet laminate is pressed and adhered.
  • the laser output is 21 W or more, and the scanning speed is 250 mm / second or less, so that it is possible to perform fusion preferably.
  • These irradiation conditions are not limited to the conditions shown here because they vary greatly depending on the physical properties of the sheet laminate and the conveyance speed.
  • the above-mentioned fused portion is attached to the sheet laminate 101 by inserting a heated needle (heat needle) into the sheet laminate 101 in which a plurality of sheets 111 to 116 are stacked. A through hole 151 having 152 is formed.
  • FIG. 13 is a schematic diagram showing a drilling apparatus 107 that can be preferably used in the second method.
  • a punching apparatus 107 shown in FIG. 13 includes a roll 171 with a needle for punching, and a suction gripping roll 175 arranged to face the roll 171 with a needle, and the sheet laminate 101 introduced between both rolls 171 and 175. Further, a through-hole 151 having a fused portion 152 is formed in the sheet laminate 101 by piercing a thermal needle 172 protruding from the outer peripheral surface of the roll 171 with needle.
  • the roll with needle 171 includes a metal roll main body 173 that can be heated by a heater housed therein, and a heat insulating portion 174 that is provided in a cylindrical shape around the roll main body 173.
  • a plurality of the thermal needles 172 are provided at predetermined intervals in the circumferential direction of the needle-attached roll 171.
  • Each of the thermal needles 172 is fixed so that the distal end protrudes from the heat insulating portion 174 and the proximal end side is positioned in the roll body 173. Yes.
  • the hot needle 172 can be heated to a predetermined temperature by heating with a heater. As shown in FIG.
  • the suction gripping roll 175 has a suction hole 176 on the outer peripheral surface, and the sheet stack 101 introduced from the introduction portion 175 a where the introduction roll 177 is disposed is removed from the suction hole 176. While sucking and holding the outer peripheral surface by suction, it is transported to the punching portion 175b by the hot needle 172, and the sheet laminate 101 or the sheet fusion body 105 after punching is sucked by the suction hole 176 to the outer peripheral surface. While being held, it can be conveyed to the lead-out part 175c where the lead-out roll 178 is arranged.
  • the roll with needle 171 and the suction gripping roll 175 are rotationally driven in the direction of the arrow in the figure by a driving mechanism (not shown). In FIG. 14, the left-right direction is the axial length direction of both rolls 171, 175.
  • punching with the hot needle 172 can be performed on the sheet laminate 101 in the state of being sucked and held by the suction gripping roll 175, and the sheet laminate 101 or sheet after punching is performed.
  • the fused body 105 By conveying the fused body 105 while sucking, solidification of the melted and integrated portion of the sheet is promoted by air cooling by suction. Therefore, it is possible to efficiently manufacture the sheet fusion body 105 in which the fused portion 152 is separated from the one surface 105a of the sheet or preferably from the both surfaces 105a and 105b.
  • the temperature of the hot needle 172 constitutes the sheet fusion body 105.
  • the temperature is preferably equal to or higher than the resin melting temperature of the sheet to be formed, and more preferably 200 to 300 ° C.
  • the resin melting temperature of the sheet constituting the sheet fusion body is the melting point of the constituent fibers of the sheet when the sheet fusion body is composed of one type of sheet having the same composition. In the case of a plurality of types of sheets having different compositions, it is the highest temperature among the melting points of the constituent fibers of the sheet.
  • the clearance P between the heat insulating portion 174 of the needle-attached roll 171 and the suction gripping roll 175 is 80% or less, particularly 30 to 70%, of the non-pressurized thickness of the sheet fusion body 105. It is preferable from the surface of the touch and the hardness of a fusion
  • heat insulation urethane, glass wool, rock wool, etc. are mentioned.
  • the suction from a part of the suction holes 176a is stopped, and the tip of the hot needle 172 is inserted into the suction holes 176a. It is preferable to perform perforation processing from the viewpoint of efficiently joining firmly from the upper surface to the lower surface of the sheet fusion body.
  • the diameter of the suction hole 176 into which the tip of the thermal needle 172 is inserted needs to be larger than the diameter of the insertion portion of the thermal needle 172.
  • the fusion peripheral portion 152 and the opening peripheral edge of the through hole are formed on the processed surface 105b ( From the viewpoint of preventing the protrusion from seeing in FIG. 14, the diameter of the suction hole 176 is desirably 3 mm or less with respect to the diameter of the thermal needle 172 (the maximum diameter of the portion inserted into the suction hole 176).
  • the elastic recovery of the sheet fusion body at the time of non-pressurization that is actually used is more
  • the welded portion can be separated from the surface of the sheet fusion body more effectively.
  • the sheet fusion product of the present invention can be used as various articles as it is or integrated with other members.
  • various articles include absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads, floor cleaning sheets, body wiping sheets, and the like.
  • absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads, floor cleaning sheets, body wiping sheets, and the like.
  • a sheet fusion body constituting an absorbent article a part located on both sides of the front body and a part located on both sides of the back body of the exterior body of a pants-type disposable diaper are overlapped and partially melted.
  • Examples include a surface sheet that forms an abutment surface, a back sheet that forms a non-skin abutment surface, and a water-repellent side sheet, which are partially fused.
  • the sheet contained in the sheet laminate and fused together examples include non-woven fabrics, resin films, fiber webs that have not been made non-woven fabrics, and the like by various manufacturing methods. Moreover, it is preferable that one or both of the two sheets adjacent in the thickness direction include fibers made of a thermoplastic resin.
  • the thermoplastic resin include polyolefin such as polypropylene, polyester such as polyethylene terephthalate, polyamide, and the like, and composite fibers composed of these two or more resins can also be used.
  • the sheet laminate 1 may be one in which two sheets, three sheets, or five or more sheets are stacked in addition to a stack of four sheets.
  • the sheets to be fused are preferably all the sheets included in the sheet laminate 1, but may be two of three or more sheets.
  • the sheet laminate 101 and / or the sheet fusion body (laminated sheet) 105 is a laminate of 6 to 5 sheets, 2 to 5 sheets, or 7 or more sheets, and these are through holes. They may be joined by a fusion part provided on the inner peripheral surface.
  • it is preferable that the sheets to be fused are all sheets included in the sheet laminate 101.
  • the belt-shaped sheet laminates 1 and 101 may be irradiated with laser light at a predetermined interval instead of being continuously irradiated with laser light. good.
  • the sheet laminate may not be in the form of a belt, for example, a plurality of sheets cut into a rectangular shape may be stacked to form a sheet laminate, and a flat pressing member may be placed on the sheet laminate and irradiated with laser light. it can.
  • the sheet laminate may be moved without moving the laser light irradiation point, or the laser light irradiation point may be moved without moving the sheet laminate.
  • seat laminated bodies 1 and 101 with the pressing members 3 and 103 is not restricted to what has a cylindrical peripheral surface like the conveyance rolls 2 and 102 of embodiment mentioned above.
  • the cylindrical roll which is a cylindrical pressing member may have the through holes 6a formed over the entire circumference in the circumferential direction of the roll.
  • fusion part 51 formed in a sheet fusion body may have a through-hole in the center part.
  • the fusion part 51 of sheets is formed in the inner peripheral surface of the through-hole formed in the sheet fusion body, and this fusion part 51 was spaced apart from one side of the sheet fusion body. It is preferable that the opening peripheral edge portion of the through hole is not protruded from the other surface of the sheet fusion body.
  • the present invention further discloses the following production method, production method for absorbent articles, or sheet fusion product.
  • a method for producing a sheet fusion body which obtains a sheet fusion body in which sheets in a sheet laminate are fused by irradiating a laser beam onto a sheet lamination body in which a plurality of sheets are laminated, A pressing member having a plurality of through holes formed in a predetermined pattern is brought into contact with one surface of the sheet laminate, and the one surface is configured from the pressing member side with respect to the sheet laminate in that state.
  • a laser beam having a wavelength which is absorbed by the sheet to be heated and heats the sheet a sheet fusion is obtained in which the fused part of the sheets is formed in a pattern corresponding to the formation pattern of the through holes.
  • ⁇ 2> Using a sheet having compression recoverability as at least one of a plurality of sheets, irradiating the laser beam on the sheet laminated body pressed and compressed by the pressing member, and then using the pressing member The method for producing a sheet fusion body according to ⁇ 1>, wherein by releasing the pressurization, a sheet fusion body in which a fusion portion between the sheets becomes a concave portion is obtained.
  • the sheet having compression recoverability is a non-woven fabric or a non-woven fiber web that is a fiber assembly sheet having voids between fibers. .
  • ⁇ 4> While continuously transporting the belt-shaped sheet laminate, the endless pressing member stretched between the rolls is pressed against the sheet laminate, and the sheet laminate under the state is irradiated with laser light, The method for producing a sheet fusion body according to any one of ⁇ 1> to ⁇ 3>, wherein the sheet fusion body is continuously formed.
  • ⁇ 5> While continuously transporting the belt-shaped sheet laminate, the sheet laminate is brought into contact with a cylindrical pressing member, and the sheet laminate in that state is irradiated with laser light from the inside of the pressing member, The method for producing a sheet fusion body according to any one of ⁇ 1> to ⁇ 3>, wherein the sheet fusion body is continuously formed.
  • a negative pressure space is provided on a side opposite to a surface that pressurizes the sheet laminated body, and laser light is irradiated to the sheet laminated body from the pressing member side through the negative pressure space.
  • a method for producing an absorbent article comprising a step of producing a sheet fusion product by the method for producing a sheet fusion product according to any one of ⁇ 1> to ⁇ 7>.
  • the absorbent article is a pants-type diaper, and a sheet member constituting an outer body of the pants is folded in a width direction to form a side seal portion to form a sheet fusion body. Manufacturing method for absorbent articles.
  • the sheet fusion body is formed at a position separated from the sheet and the opening peripheral edge portion of the through hole does not protrude from the other surface of the sheet fusion body.
  • ⁇ 11> The sheet fusion body according to ⁇ 10>, wherein the fusion part is formed at a position separated from any surface of the sheet fusion body.
  • ⁇ 12> The sheet fusion body according to ⁇ 11>, wherein the fusion part has a thickness in the thickness direction of the sheet fusion body of 30% or more of the thickness of the sheet fusion body.
  • ⁇ 13> The sheet fusion body according to any one of ⁇ 10> to ⁇ 12>, wherein the fusion part is formed by laser light irradiation.
  • ⁇ 14> The sheet fusion body according to any one of ⁇ 10> to ⁇ 13>, wherein the fusion part is formed by inserting a hot needle into a sheet laminate in which a plurality of sheets are stacked.
  • six sheets of an air-through nonwoven fabric, a spunbond nonwoven fabric, an air-through nonwoven fabric, an air-through nonwoven fabric, a spunbond nonwoven fabric, and an air-through nonwoven fabric were stacked in this order to form a sheet laminate.
  • the pressing member 3 made of a plain woven mesh having a metal wire diameter of 0.29 mm, an opening of 0.5 mm, an aperture shape of square, an aperture ratio of 63.3%, and a length and width of 100 ⁇ 100 mm,
  • a laser beam was irradiated from the pressing member 3 side to obtain a sheet fusion body.
  • a CO2 laser was irradiated at a laser spot diameter of 0.17 mm, an output of 18 W, and a scanning speed of 250 mm / s.
  • the pressing member was scanned with a laser beam and irradiated with a width corresponding to one row of through holes arranged in series in the MD direction.
  • the irradiation time of one through hole is approximately 2 msec.
  • a micrograph of the obtained sheet fusion product is shown in FIG.
  • fusion parts 51 were formed in a line at regular intervals, and the gaps between the fusion parts 51 were approximately the same as the intervals between the meshes of the plain woven mesh.
  • the length of each fused part in the direction in which the row of fused parts 51 extends is approximately 0.68 mm, and the length of the non- or low fused part existing between the fused parts is approximately 0.12 mm.
  • the length of each fused part in the direction orthogonal to the direction in which the rows of the parts 51 extend was approximately 0.37 mm.
  • melting part 51 all the sheets which comprise a sheet fusion body were integrated.
  • the size of the fused portion 51 is approximately 1.01 in terms of the area ratio as compared with the size of the mesh of the plain weave mesh.
  • the shape of the fused part 51 is a rectangle with smooth corners, as shown in FIG.
  • the constituent fibers of the nonwoven fabric are melted to form a hole, and the fibers are integrated at the edge portion of the hole, and the fused portion 51 is clearly distinguished from the surface of the other portion. It was something.
  • fusion body is a recessed part on both surfaces of this sheet
  • the fused portions of the sheets are arranged in a predetermined state, the arrangement of the fused portions is easy to visually recognize, and the sheet fusion with a soft touch feeling is provided.
  • a kimono can be manufactured efficiently.
  • the sheet fusion product (laminated sheet) of the present invention (third invention) has high bonding strength between sheets and good touch.

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Abstract

La présente invention concerne un procédé pour la production d'un corps présentant des feuilles fusionnées (5) grâce auquel le corps présentant des feuilles fusionnées (5), qui est formé en fusionnant des feuilles à l'intérieur d'un stratifié (1) de feuilles, est obtenu en irradiant le stratifié (1) de feuilles, qui est formé en empilant plusieurs feuilles, à l'aide d'un faisceau laser (4). Un organe de pressage (3) présentant plusieurs trous de passage (3a) qui sont formés selon un schéma établi est amené en contact avec une surface (1a) du stratifié (1) de feuilles. Le corps présentant des feuilles fusionnées (5), dans lequel les parties fusionnées (51) des feuilles sont formées selon un schéma correspondant au schéma formé par les trous de passage (3a), est obtenu par irradiation, à partir du côté de l'organe de pressage (3), du stratifié (1) de feuilles à l'état susmentionné à l'aide d'un faisceau laser (4) à une longueur d'ondes qui est absorbée par les feuilles (11), provoquant une génération de chaleur par les feuilles (11).
PCT/JP2011/076511 2010-11-22 2011-11-17 Procédé pour la production d'un corps présentant des feuilles fusionnées et corps présentant des feuilles fusionnées WO2012070462A1 (fr)

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JP2011246780A JP5912431B2 (ja) 2010-11-22 2011-11-10 シート融着体の製造方法
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JP2015008946A (ja) * 2013-06-28 2015-01-19 花王株式会社 パンツ型着用物品及びその製造方法
WO2015064486A1 (fr) * 2013-11-01 2015-05-07 花王株式会社 Article à porter du type culotte et son procédé de production
EP2813347A4 (fr) * 2012-05-16 2015-12-02 Kao Corp Procédé de fabrication de feuilles fondues
CN105307838A (zh) * 2013-06-28 2016-02-03 花王株式会社 片熔接体的制造装置和片熔接体的制造方法
JP2016097611A (ja) * 2014-11-25 2016-05-30 花王株式会社 シート融着体の製造装置及び製造方法
CN106671438A (zh) * 2016-12-06 2017-05-17 北京大学 一种层层组装三维功能复合材料及其制备方法
IT201700119053A1 (it) * 2017-10-20 2019-04-20 Fameccanica Data Spa Procedimento e apparecchio per produrre un nastro traspirante e relativo nastro
US10709617B2 (en) 2013-06-28 2020-07-14 Kao Corporation Absorbent article with fusion bonded side seams
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