WO2015064405A1 - シート融着体の製造装置及び製造方法 - Google Patents

シート融着体の製造装置及び製造方法 Download PDF

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Publication number
WO2015064405A1
WO2015064405A1 PCT/JP2014/077793 JP2014077793W WO2015064405A1 WO 2015064405 A1 WO2015064405 A1 WO 2015064405A1 JP 2014077793 W JP2014077793 W JP 2014077793W WO 2015064405 A1 WO2015064405 A1 WO 2015064405A1
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WIPO (PCT)
Prior art keywords
support member
sheet
sheet laminate
slit
diaper
Prior art date
Application number
PCT/JP2014/077793
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English (en)
French (fr)
Japanese (ja)
Inventor
邦利 山田
拓郎 梁島
淳 岩崎
Original Assignee
花王株式会社
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Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480058540.3A priority Critical patent/CN105682895B/zh
Priority to BR112016009866-8A priority patent/BR112016009866B1/pt
Publication of WO2015064405A1 publication Critical patent/WO2015064405A1/ja

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    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B29C66/72941—Non woven mats, e.g. felt coated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15723—Partitioning batts; Cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
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    • A61F13/15739—Sealing, e.g. involving cutting
    • A—HUMAN NECESSITIES
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/15577—Apparatus or processes for manufacturing
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C65/7858—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 characterised by the feeding movement of the parts to be joined
    • B29C65/7879—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 characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path
    • B29C65/7882—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 characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path said parts to be joined moving in a circular path
    • B29C65/7885—Rotary turret joining machines, i.e. having several joining tools moving around an axis
    • 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
    • B29C65/7858—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 characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
    • 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
    • B29C66/002—Removing toxic gases
    • 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
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—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 sheet fusion product manufacturing apparatus and method.
  • a heat roll apparatus has been widely used for joining stacked sheets.
  • a method of welding using a laser beam is also known.
  • Patent Document 1 a sheet laminate in which a plurality of sheets are stacked is deformed into a shape along the peripheral surface of a rotary roll having a laser light transmitting portion on the peripheral surface, and the sheet is conveyed.
  • a method of irradiating the laminated body with laser light from the inside of the rotary roll to fuse the sheets in the laminated sheet is described.
  • a sheet laminate to be fused is conveyed while being sandwiched between a rotating roll and a belt, and fusion is performed by irradiation with laser light while being conveyed.
  • a gas containing resin fume may be generated from the sheet laminate to be fused.
  • Resin fume is a fine solid particle generated by solidification of vapor of a solid substance or a chemical reaction of a gaseous substance, and there is a possibility that it will ignite if it stays in air at a high concentration. Further, the generated fume adheres to and accumulates on the rotating rolls and belts, contaminates these members, and the deposits are transferred to the product, which may cause defective products. Therefore, local exhaust of the gas containing resin fume is required.
  • the sheet laminate since the sheet laminate is conveyed while being sandwiched between a rotating roll and a non-breathable belt, it may not be easy to exhaust the generated gas.
  • the present invention provides an apparatus for manufacturing a sheet fusion body having a seal edge portion fused in a state where edges of a plurality of sheets overlap.
  • the apparatus has a first surface over a longitudinal direction of a strip-shaped sheet laminate having a first surface and a second surface located on the opposite side, and a plurality of sheets including a resin material at least partially overlapped.
  • the support member has a slit-like opening that is long in the width direction of the sheet laminate, through which laser light irradiated from the second surface side can pass.
  • An air suction portion for sucking air from the opening is disposed at a position on the first surface side of the support member so as to face the slit-like opening.
  • the sheet laminate supported on the first surface of the support member is irradiated with laser light from the second surface side along the slit-shaped opening, and the sheet laminate is divided in the width direction.
  • a sheet fusion body having the seal edge is manufactured by fusing the divided edges in an overlapping state, and the gas generated by the division is sucked and removed by the air suction section.
  • the present invention is a method for producing a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets are overlapped,
  • a strip-shaped sheet laminate in which a plurality of sheets including at least a part of a resin material are stacked on a first surface of a support member having a first surface and a second surface located on the opposite side thereof over the longitudinal direction.
  • Support, Laser light is emitted from an irradiation head that is disposed on the second surface side of the support member and has a lens that collects laser light toward the sheet laminate that is supported on the first surface of the support member.
  • the present invention provides a method for producing a sheet fusion product that is sucked and removed by an air suction unit.
  • FIG. 1 is a perspective view schematically showing a pants-type disposable diaper as an example of a sheet fusion product manufactured according to the present invention.
  • FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG.
  • FIG. 3 is a plan view schematically showing an unfolded and extended state of the diaper shown in FIG.
  • FIG. 4 is a perspective view schematically showing a manufacturing process of a diaper continuous body in the manufacture of the diaper shown in FIG.
  • FIG. 5 is a perspective view schematically showing a manufacturing apparatus for a pants-type disposable diaper as an embodiment of the manufacturing apparatus for a sheet fusion body of the present invention.
  • FIG. 6 is a perspective view schematically showing a pressure head in the manufacturing apparatus for the pants-type disposable diaper shown in FIG.
  • FIG. 7A is a cross-sectional view taken along the line aa in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line bb in FIG.
  • FIG. 8 is a perspective view of the pressure head shown in FIG. 6 as viewed from the lower surface side.
  • FIG. 9 is an exploded perspective view showing a main part of the pressure head shown in FIG.
  • FIG. 10 is a cross-sectional view schematically showing a cross-sectional structure passing through the rotation axis of the support member in the manufacturing apparatus shown in FIG.
  • FIG. 11 is a schematic diagram illustrating a state of the swinging motion of the pressure member that circulates along the peripheral surface of the support member.
  • FIGS. 12A to 12C are schematic views sequentially showing the state until the pressure head in the swinging process state is in a pressure state.
  • FIGS. 13A to 13C each form a side seal portion (seal edge) at the same time that the diaper continuous body (band-shaped exterior body) is divided using the laser-type bonding apparatus shown in FIG. It is explanatory drawing explaining a mode.
  • FIG. 14 is a cross-sectional view showing a cross section orthogonal to the direction in which the side seal portion extends, showing the side seal portion of the diaper shown in FIG. 1 and the vicinity thereof.
  • a pair of sheet fusion bodies that are objects to be manufactured according to the present invention that is, a sheet fusion body having a seal edge portion fused in a state where edges of a plurality of sheets overlap each other
  • the present invention will be described by taking a pants-type disposable diaper having an exterior body having a side seal part as an example.
  • the diaper 1 includes an absorbent main body 2 and an exterior body 3 that forms the outer surface of the diaper 1, and left and right side edges A1, A1 along the longitudinal direction X of the exterior body 3 in the front body F (abdominal side 1A). And the left and right side edges B1 and B1 along the longitudinal direction X of the exterior body 3 in the back body R (back side part 1B) are joined together to form a pair of side seal parts 4 and 4, a waist opening part 8 and a pair of leg openings. Portions 9 and 9 are formed.
  • the exterior body 3 is positioned on the non-skin contact surface side of the absorbent main body 2 and fixes the absorbent main body 2.
  • the diaper 1 has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the wearer's front-rear direction in a developed and extended plan view as shown in FIG.
  • the diaper 1 can be divided into a crotch part 1C arranged at the crotch part at the time of wearing, and an abdominal side part 1A and a back side part 1B located in the longitudinal direction X.
  • the exterior body 3 in the crotch part 1 ⁇ / b> C is formed with recesses for forming leg openings 9, 9 at the left and right side edges along the vertical direction X.
  • the diaper 1 can be divided into a front body F and a back body R with a virtual center line CL that bisects the diaper 1 in the vertical direction X as a boundary.
  • a skin contact surface is a surface in the underpants type disposable diaper 1 or its component (for example, absorptive main body), and is turned to a wearer's skin side at the time of wear
  • a non-skin contact surface is In the pants-type disposable diaper 1 or a component thereof, the surface is directed to the side opposite to the wearer's skin side (clothing side) when worn.
  • the vertical direction X corresponds to the direction (longitudinal direction) along the long side of the absorbent main body 2 which is a disposable diaper or its constituent member
  • the horizontal direction Y is the absorbent which is a disposable diaper or its constituent member. It coincides with the width direction of the main body 2.
  • the absorbent main body 2 has a vertically long shape in which one direction (vertical direction X) is relatively long, and a surface sheet 2 a that forms a skin contact surface, and a non-skin contact A back sheet 2b that forms a surface, and a liquid-retaining absorbent 2c interposed between the two sheets.
  • the absorbent 2c has a shape that is long in the same direction as the longitudinal direction X. .
  • the absorptive main body 2 is joined to a central portion of the outer package 3 by a known joining means (adhesive or the like) with its longitudinal direction coinciding with the longitudinal direction X of the diaper 1 in the expanded and extended state.
  • the expanded and extended state means that the side seal part is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded, and the design dimensions (the influence of the elastic member is completely eliminated). In this state, it is the same as the size when it is spread in a flat shape.
  • the outer package 3 is disposed on the outer layer sheet 31 that forms the outer surface of the diaper 1 (the non-skin contact surface of the outer package 3), and the inner surface side of the outer layer sheet 31.
  • An inner layer sheet 32 that forms the inner surface of 1 (skin contact surface of the exterior body 3), and a plurality of thread-like or belt-like elastic members 5, 6, and 7 fixed between the sheets 31 and 32 with an adhesive. It is configured to include.
  • the two sheets 31 and 32 are joined to each other at a predetermined site by an adhesive or heat seal (not shown).
  • the exterior body 3 includes a resin material and is formed using the resin material as a main component.
  • the resin material includes a heat-sealable synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene, and includes a nonwoven fabric, a film, a laminate sheet of a nonwoven fabric and a film, and the like.
  • the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.
  • the pair of side seal parts 4, 4 in the diaper 1 is formed so that the edge part of the exterior body 3 in the front body F and the edge part of the exterior body 3 in the back body R are the side seal parts 4. It has a seal edge portion 41 joined by a continuous linear fusion portion 40 extending in the longitudinal direction.
  • the seal edge 41 in the diaper 1 is formed continuously over the entire length between the waist opening 8 and the leg opening 9 in each of the side seal portions 4 and 4.
  • the fused portion 40 in the seal edge portion 41 is obtained by melting and solidifying constituent resins of the sheets in a state where the edge portions of a plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the exterior body 3 are overlapped. Is formed.
  • the pants-type disposable diaper 1 having the above configuration can be manufactured by a method using an apparatus described below.
  • the manufacturing method of the diaper 1 exists in the superposition
  • polymerization pressurization process which makes the formation planned site
  • the exterior body 3 is divided, A side seal portion forming step of forming the side seal portion 4 by fusing the cut edge portions of the laminated exterior body produced by the division.
  • the main body fixing process which fixes the absorptive main body 2 to the strip
  • the strip-shaped exterior body 3 (outer layer sheet 31, inner layer sheet 32) is folded in the width direction.
  • the front body side and the back body side of the strip-shaped exterior body 3 to which the absorbent main body 2 is fixed are overlapped with each other, whereby “a precursor of a pants-type disposable diaper in which a side seal portion is not formed is unidirectional.
  • a continuous diaper 10 is produced.
  • the strip-shaped outer package 3 in the diaper continuous body 10 is divided (melted) individually by irradiation with the laser beam 30 using the apparatus shown in FIG.
  • a plurality of outer package bodies 3 (outer layer sheet 31 and inner layer sheet 32) in a laminated state produced by the division are fused to each other, and the outer package body 3 having a pair of side seal portions 4 and 4 is provided.
  • the pants-type disposable diaper 1 is continuously manufactured.
  • the waist elastic member 5 that forms the waist gather the waist elastic member 6 that forms the waist gather
  • the leg elastic member 7 that forms the leg gather have a predetermined elongation rate.
  • a plurality of each are arranged in the stretched state.
  • the leg elastic member 7 is arranged while forming a predetermined leg-circumferential pattern via a known swing guide (not shown) that reciprocates perpendicular to the sheet flow direction.
  • the belt-shaped outer layer sheet 31 and the belt-shaped inner layer sheet 32 are coated with an adhesive coating machine (see FIG. (Not shown) to apply hot melt adhesive.
  • the elastic members such as the waist elastic member 5 and the waistline elastic member 6 are divided by the laser light irradiation in both the sheets 31 and 32 (the portion where the side seal portion 4 is to be formed, in FIG. 13 described later).
  • the portion and It is preferable to apply an adhesive in the vicinity thereof.
  • a hot melt adhesive is intermittently applied to the waist elastic member 5 and the waist elastic member 6 by an adhesive application machine (not shown) before being arranged between the sheets 31 and 32. May be.
  • a plurality of waistline elastic members 6 and a plurality of leg portion elasticities are made by using elastic member precut means (not shown) so as to correspond to positions where the absorbent main body 2 described later is disposed.
  • the member 7 is pressed and divided into a plurality of pieces so that the contraction function is not expressed.
  • the elastic member precut means include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605.
  • an adhesive such as a hot melt adhesive is applied in advance to the absorbent main body 2 manufactured in a separate process, and the absorbent main body 2 is rotated by 90 degrees to form a belt-shaped outer package. 3 is intermittently supplied and fixed on the inner layer sheet 32 constituting 3 (main body fixing step). Then, as shown in FIG. 4, a leg hole LO ′ is formed inside the annular portion that is annularly surrounded by the leg elastic member 7 in the strip-shaped exterior body 3 in which the absorbent main body 2 is disposed.
  • This leg hole forming step can be carried out by using a technique similar to that in a conventional method for manufacturing this type of article, such as a rotary cutter and a laser cutter.
  • the strip-shaped exterior body 3 is folded in the width direction (a direction perpendicular to the conveying direction of the exterior body 3). More specifically, as shown in FIG. 4, both side portions 3 a, 3 a along the conveying direction of the strip-shaped outer package 3 are folded back so as to cover both longitudinal ends of the absorbent main body 2. After fixing both ends in the longitudinal direction, the outer package 3 is folded into two in the width direction together with the absorbent main body 2 (polymerization step in the polymerization pressure step). In this way, the diaper continuous body 10 is obtained.
  • the diaper continuous body 10 thus manufactured is irradiated with laser light using a laser bonding apparatus 20 to form a pair of side seal portions 4 and 4 (side seal portion).
  • a pants-type disposable diaper 1 having an exterior body 3 having a pair of side seal portions 4 is continuously manufactured.
  • the laser-type bonding apparatus 20 will be described.
  • the laser-type bonding apparatus 20 is arranged in a hollow cylindrical roll 23 that is driven to rotate in the direction of arrow D as shown in FIG.
  • An irradiation head 35 that irradiates a laser beam 30 toward a cylindrical support member 21 that forms a peripheral surface portion of the cylindrical roll 23 is provided.
  • the irradiation head 35 has a lens that collects the laser light 30.
  • the cylindrical support member 21 has a first surface 21a facing outward and a second surface 21b facing inward.
  • the irradiation head 35 is disposed on the second surface 21 b side of the support member 21.
  • the support member 21 forms a peripheral surface portion (contact portion with the workpiece) of the cylindrical roll 23, and a pair of annular frames (not shown) that form both ends of the cylindrical roll 23 in the rotation axis direction. It is clamped between them.
  • the support member 21 is made of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramics.
  • the support member 21 has a light passage portion 27 through which laser light can pass. As shown in FIG. 5, the support member 21 has a slit-shaped opening 27 that penetrates the support member 21 in the thickness direction as a light passage portion.
  • the opening 27 has a rectangular shape in plan view, and the longitudinal direction of the opening 27 intersects with the conveyance direction D of the diaper continuous body 10 (band-shaped exterior body 3). More specifically, the opening 27 It extends so as to coincide with a direction parallel to the axial direction of the rotating shaft, and a plurality of them are provided at predetermined intervals along the circumferential direction (conveying direction D) of the cylindrical support member 21.
  • the support member 21 allows the laser light to pass through the opening 27, but does not allow the laser light to pass (transmit) at portions other than the opening 27.
  • a method of forming the opening 27 in the support member 21 1) etching and punching a predetermined portion of the support member 21 made of a single annular member having the same length as the circumference of an annular frame (not shown).
  • a method of drilling the opening 27 by laser processing or the like, and 2) a plurality of curved rectangular members are used as the support member 21 instead of a single annular member, and the plurality of members are used as a pair of frames.
  • the laser-type bonding apparatus 20 includes a plurality of pressure heads 26 in addition to the support member 21 and the irradiation head 35 described above.
  • the pressure head 26 is used to press the diaper continuous body 10 supported on the first surface 21a of the support member 21 described above.
  • Each pressure head 26 has a rotation axis on an extension line of the rotation axis of the cylindrical roll 23, and is arranged on the peripheral surface of the second cylindrical roll 25 arranged adjacent to the cylindrical roll 23.
  • the second cylindrical roll 25 rotates in synchronization with the cylindrical roll 23.
  • each pressure head 26 is attached to a second cylindrical roll 25, which is a separate member from the cylindrical roll 23. Instead, each pressure head 26 is attached to the cylindrical roll 23. It is also possible to attach.
  • each pressurizing head 26 is in the same direction as the rotation direction of the support member 21 constituting the cylinder of the cylindrical roll 23 and the circumference of the support member 21. It is possible to go around along the peripheral surface of the support member 21 at the same speed as the speed.
  • Pressure head 26 shown in 10 to FIG. 6, has a width direction Y 1 perpendicular longitudinal X 1 and therewith, has a vertically long shape along a longitudinal direction X 1.
  • Pressure head 26 is the longitudinal direction X 1, the circumferential direction of the cylindrical support member 21, i.e., perpendicular to the conveying direction of the diaper continuum 10, and the width direction Y 1, the circumferential direction of the cylindrical support member 21 That is, it arrange
  • the pressure head 26 includes a main body portion 50A and a pressure portion 50B.
  • the main body portion 50A has the width direction Y 1 perpendicular longitudinal X 1 and therewith, and a vertically long block body along a longitudinal direction X 1.
  • Body part 50A has one end to the distal end portion 52a of the longitudinal X 1, and has a rear end portion 52b at the other end.
  • a connecting member 53 is connected to the rear end portion 52b.
  • the main body portion 50 has a main body hollow portion 51 therein.
  • Main hollow portion 51, the shape of the cross section is of circular and extends in the longitudinal direction X 1 of the main body portion 50.
  • the main body hollow portion 51 communicates with the connection member 53 at the position of the rear end portion 52 b of the main body portion 50.
  • the connection member 53 is connected to suction means (not shown).
  • Pressing 50B a pair of and a local pressure member 54, the local pressure member 54 depending from the lower surface of the main body portion 50A is of a vertically long plate extending in the longitudinal direction X 1, It is formed integrally with the main body 50A.
  • Local pressure member 54 has a predetermined thickness along the width direction Y 1, the lower surface is in pressing surface 54A.
  • the pressing surface 54A is a flat surface.
  • the local pressure member 54 is used to locally pressurize the sheet laminate 10 supported on the first surface 21 a of the support member 21 by the pressure surface 54 ⁇ / b> A.
  • a pair of local pressure member 54 is arranged parallel to a non-contact state at a predetermined interval along the width direction Y 1. Therefore, a space S is provided between the pair of local pressure members 54 and 54.
  • Space S extends along the longitudinal direction X 1 of the pressure head 26, and extends also along the longitudinal direction of the pressure head 26.
  • the space S communicates with the main body hollow portion 51 provided inside the main body portion 50A described above.
  • the space S is open at the lower ends of the pair of local pressure members 54, 54. This opening functions as the air suction port 55.
  • the space S communicates with the main body hollow portion 51, the main body hollow portion 51 communicates with the connection member 53, and the connection member 53 is connected to suction means (not shown).
  • the pressure head 26 includes an air suction part having the air suction port 55. That is, the pressurizing head 26 has a function of pressurizing the sheet laminate 10 supported on the first surface 21 a of the support member 21 and a function of sucking and removing the gas generated by the irradiation of the laser beam 30. It has two functions.
  • Air suction port 55 is the width (in FIG. 7 (b), the length along the width direction Y 1) is, along the circumferential direction of the width (the support member 21 of the slit opening 27 in the support member 21 described above The length). However, in some cases, the width of the air suction port 55 can be made equal to or smaller than the width of the slit-shaped opening 27. The length of the air suction port 55 with respect to the (in FIG. 7 (a), the longitudinal direction X length along the 1) needs to be larger than the length of the cutting scheduled portion of the diaper (side seal portion).
  • the length of the air suction port 55 is larger than the length of the slit-shaped opening 27 in the support member 21 (the length along the axial direction of the support member 21). It has become.
  • the pressure head 26 is in contact with the outer surface which is the first surface 21 a of the support member 21 so that the air suction port 55 formed on the pressure head 26 covers the entire slit-shaped opening 27 of the support member 21. Placed in. That is, the air suction port 55 extends in the same direction as the direction in which the slit-shaped opening 27 provided in the support member 21 extends, and is disposed opposite to the slit-shaped opening 27.
  • the local pressure member 54 is located at the position on the first surface 21a side of the support member 21 as shown in FIG. A pair of pressure surfaces 54 ⁇ / b> A are disposed adjacent to the air suction port 55 so as to extend in the direction and are positioned with the air suction port 55 interposed therebetween.
  • the pressure head 26 further includes a pair of tension applying members 56 and 56.
  • the tension applying member 56 is used to apply tension to the sheet laminate 10 supported on the first surface 21 a of the support member 21.
  • Tensioning member 56 is of a vertically long plate extending in the longitudinal direction X 1 of the pressure head 26 has a predetermined thickness along the width direction Y 1. As shown in FIG. 8, in the present embodiment, tensioning member 56 has a length along the longitudinal direction X 1 is longer than the air suction port 55, the front and rear ends of the longitudinal direction X 1 of the air suction port 55 It extends from front to back. However, the length of the tension applying member 56 does not need to be longer than the air suction port 55, and may be equal to or shorter than the air suction port 55.
  • the pair of tension applying members 56, 56 extend in the same direction as the direction in which the air suction port 55 extends, and are disposed so as to sandwich the pair of local pressure members 54. Further, the pressure head 26 is provided with a pair of fixing plates 58 arranged so as to sandwich the pair of tension applying members 56.
  • the tensioning member 56 has a plurality of openings 56a in the longitudinal direction X 1 is provided.
  • the opening 56a is a long hole that is long in the vertical direction.
  • a plurality of openings 58a in the longitudinal direction X 1 is provided.
  • the tension applying member 56 and the fixing plate 58 are attached to the side surface of the local pressure member 54, they overlap each other. It is arranged to do. Then, under the state where the tension applying member 56 is disposed on the side surface of the local pressure member 54 and the fixing plate 58 is disposed on the outer surface of the tension applying member 56, the inside of the opening 56a provided in the tension applying member 56, A bolt 57 is inserted into an opening 58a provided in the fixing plate 58, and the bolt 57 is screwed into a screw hole 54a provided in the local pressurizing member 54, whereby the tension applying member 56 and the fixing plate 58 are connected. It is fixed to the local pressure member 54.
  • the fixing plate 58 is used for the purpose of distributing the bolting pressure so that the tension applying member 56 is not excessively deformed due to bolting.
  • the tension applying member 56 When the tension applying member 56 is fixed to the side surface of the local pressure member 54 by bolting, it is supported on the lower surface of the tension applying member 56, that is, on the first surface 21 a of the support member 21 as shown in FIG.
  • the facing surface 56 ⁇ / b> A facing the diaper continuous body 10 protrudes below the pressing surface 54 ⁇ / b> A of the local pressing member 54.
  • the pressing surface 54A of the local pressing member 54 presses the sheet stack.
  • the lower surface 56 ⁇ / b> A of the tension applying member 56 comes into contact with the diaper continuous body 10.
  • the degree of protrusion of the tension applying member 56 is changed by adjusting the position where the bolt 57 is inserted into the opening 56a formed of a long hole provided in the tension applying member 56 when the tension applying member 56 is bolted. Can be made.
  • the tension applying member 56 is made of a flexible material. By carrying out like this, tension
  • an elastic material such as natural rubber or synthetic rubber can be used.
  • FIG. 10 shows the operation of the pressure head 26 having the above configuration.
  • FIG. 10 schematically shows an essential part of a cross section of the laser type bonding apparatus 20.
  • This figure is a longitudinal sectional view passing through the rotation axis of the cylindrical roll 23 and the support member 21.
  • the pressurizing head 26 has a hinge structure at the longitudinal direction X 1 , in other words, at the rear end portion 52b which is one end in the direction in which the air suction port 55 provided in the pressurizing head 26 extends.
  • a support portion 24 is provided.
  • the support part 24 is attached to the second rotating roll 25.
  • the pressurizing head 26 can swing in a plane passing through the rotation axis of the support member 21, for example, in the plane of FIG. As shown in FIG.
  • the range in which the pressure head 26 performs the swinging motion is such that the pressure surface 54 ⁇ / b> A of the pressure head 26 is sufficiently separated from the peripheral surface of the support member 21 and is introduced into the peripheral surface of the support member 21.
  • the pressure surface 54 ⁇ / b> A Is a range up to a state (a state shown in the lower side in FIG. 10) that is parallel to each other.
  • the pressure head 26 oscillates while circling along the peripheral surface of the support member 21, and the local pressurizing member 54 of the pressure head 26 moves while circulating.
  • the contact / separation operation is repeated with respect to the first surface 21 a of the support member 21.
  • a known means may be used as appropriate.
  • a cam mechanism, a cylinder mechanism, or a servo motor can be used.
  • the pressure member 54 can be moved toward and away from the first surface 21 a of the support member 21.
  • the pressure head 26 can be configured to be capable of reciprocating along the radial direction of the support member 21. In this way, while the pressure head 26 circulates along the peripheral surface of the support member 21, the pressure head 26 reciprocates along the radial direction of the support member 21.
  • the pressure head 26 repeats the contact / separation operation with respect to the first surface 21 a of the support member 21.
  • the means for reciprocating the pressure head 26 is the same as the means for swinging the pressure head 26. For example, a cam mechanism, a cylinder mechanism, or a servo motor may be used.
  • FIG. 11 is a schematic diagram showing the state of the swinging motion of each pressure head 26 that circulates along the peripheral surface of the support member 21.
  • the diaper continuous body 10 supported by the first surface 21a of the support member 21 is divided into individual diapers 1 when leaving the support member 21, but for convenience of explanation, the same diaper 1 is used. In the figure, it is drawn as a continuum.
  • Each pressurizing head 26 has a different state depending on each position on the first surface 21 a of the support member 21.
  • the state of the pressure head 26 is roughly divided into an open state A, a swing process state B1, a pressurization state C, and a swing process state B2 when viewed along the circumferential direction of the support member 21.
  • Such an operation of the pressure head 26 shows an example of the present invention, and it is not impeded that the pressure head 26 performs an operation different from this and divides the diaper continuous body 10.
  • the pressurized state C is a fan-shaped range that is located 180 degrees opposite to the range of the open state A and has a wider central angle than the center angle of the fan-shaped state of the open state A.
  • the swinging process state appears during the transition from the open state A to the pressurized state C (swinging process state B1) when viewed along the rotation direction of the support member 21, and from the pressurized state C to the open state. It also appears during the transition to A (rocking process state B2).
  • the open state A is a state shown on the upper side in FIG. 10 described above, and is a fully open state in which the pressure surface 54A of the pressure head 26 is sufficiently separated from the peripheral surface of the support member 21.
  • the pressurization state C is a state shown on the lower side in FIG. 10, in which the pressurization surface 54 ⁇ / b> A of the pressurization head 26 is parallel to the peripheral surface of the support member 21. In this state, the diaper continuous body 10 supported on the first surface 21a of the support member 21 is reliably pressurized by the pressure head 26, and fusing by the laser light 30 is performed under the pressurized state. Subsequent fusion can be done successfully.
  • the swinging process state B1 the swinging of the pressure head 26 in the open state is started, and the pressure surface 54A of the pressure head 26 approaches toward the first surface 21a of the support member 21.
  • swinging of the pressure head 26 in the pressurized state is started, and the pressure surface 54 A of the pressure head 26 is separated from the first surface 21 a of the support member 21.
  • the open state A As described above, in the present embodiment, when attention is paid to one pressure head 26, while the pressure head 26 performs one round motion along the peripheral surface of the support member 21, the open state A ⁇ The operation of the swinging process state B1 going to pressurization ⁇ the pressurizing state C ⁇ the swinging process state B2 going to release is performed as one cycle operation.
  • FIG. 12A shows a state immediately before the pressure head 26 enters the pressure state C.
  • the local pressure member 54 of the pressure head 26 is not in contact with the diaper continuous body 10 supported by the first surface 21 a of the support member 21.
  • the tension applying member 56 of the pressure head 26 is not in contact with the diaper continuous body.
  • the illustration of the diaper continuous body 10 is omitted for convenience of explanation.
  • the pressure head 26 comes into contact with the diaper continuous body 10 as shown in FIG. 12 (b).
  • the pair of tension applying members 56 contacts the diaper continuous body 10, and the slit-shaped opening
  • the diaper continuous body 10 is pressed down at the positions on both sides with the 27 interposed therebetween.
  • the pair of tension applying members 56 made of a flexible material convey the diaper continuous body 10. It deform
  • each tension applying member 56 is deformed so as to be separated from each other along the conveyance direction of the diaper continuous body 10
  • the first positions at both sides of the support member 21 across the slit-like opening 27 are sandwiched.
  • the first surface 21 a be gradually lower than the opening end of the opening 27 as it moves away from the opening 27.
  • the support member 21 since the support member 21 has a curved surface shape along the cylinder, the first surfaces 21a on both sides of the opening 27 are naturally opened as the opening 27 is moved away from the opening 27. Lower than the edge.
  • the pressing of the diaper continuous body 10 by the pair of tension applying members 56 and the generation of the accompanying tension are maintained.
  • the pressurization surface of the local pressurization member 54 pressurizes the diaper continuous body 10 locally.
  • the pressurization by the local pressurizing member 54 is a position between each pressing position by each tension applying member 56 and the slit-shaped opening 27. That is, the diaper continuous body 10 supported on the first surface 21 a of the support member 21 is locally pressurized by the local pressure member 54 at positions on both sides of the slit-shaped opening 27.
  • the diaper continuous body 10 positioned on the pair of local pressing members 54 can be surely brought into close contact with a plurality of front sheets constituting the same.
  • the laser beam 30 is irradiated toward the diaper continuum 10 in a close contact state realized by this local pressurization. Then, the gas generated due to the irradiation of the laser beam 30 passes through an air suction port 55 (see FIG. 8 and the like) by an air suction unit provided in the pressure head 26 as shown in FIG. Aspirated and removed.
  • the gas generated when processing the diaper continuous body 10 by irradiation with the laser light 30 is the air disposed on the first surface 21a side in the support member 21 that supports the diaper continuous body 10. Since suction is performed by the suction unit, the gas can be efficiently sucked. Therefore, it is possible to effectively prevent ignition and the like due to the resin fume contained in the gas. Further, since the generated fumes are preferably prevented from adhering and depositing on the pressure surface 54A of the support member 21 and the pressure head 26, it is effective to generate defective products due to the deposit transferring to the product. Can be prevented.
  • the diaper continuous body 10 since the tension
  • the diaper continuous body 10 is locally pressurized only at positions on both sides of the slit-shaped opening 27, and the laser light 30 is irradiated under the locally pressurized state.
  • the sheets constituting the diaper continuous body 10 can be reliably fused to each other, and the fused portion 40 (see FIGS. 2 and 14) having sufficient strength can be formed.
  • the diaper continuous body 10 is continuously transported, and one surface thereof forms the peripheral surface portion of the cylindrical roll 23 and the slit-like opening 27 (through which the laser beam 30 can pass).
  • the diaper continuum 10 (the site where the side seal portion 4 is to be formed) brought into contact with the first surface 21a of the support member 21 having a light passage portion and brought into a pressurized state by the support member 21 and the pressure head 26.
  • the diaper continuous body 10 is divided by irradiating the laser beam 30 from the second surface 21b side of the support member 21 through the opening 27, and at the same time, the pressurized state is generated by the division.
  • the side seal portions 4 are formed by fusing the cut edge portions of a plurality of sheets (exterior body 3) so as to overlap each other (side seal portion forming step).
  • FIGS. 13A to 13C show a state in which the side seal portion 4 (seal edge) is formed at the same time when the diaper continuous body 10 (band-shaped sheet laminate) is divided using the laser-type bonding apparatus 20. It is a figure explaining.
  • FIG. 13A schematically shows a portion 10C scheduled to be divided by the laser beam 30 of the diaper continuous body 10 (a portion where the side seal portion 4 is to be formed) and the vicinity thereof.
  • segmentation scheduled parts of the diaper continuous body 10 in the aspect of illustration are the centers of the longitudinal direction (conveyance direction D) in the area
  • Such a portion 10C to be divided includes an end portion of the waist opening 8 (see FIG. 1) and its vicinity, an eight-layer structure portion in which eight sheets are stacked, and the other portions are four sheets. It is a four-layer structure part that is superimposed.
  • the four-layer structure portion includes two sheets (an outer layer sheet 31 and an inner layer sheet 32) constituting one exterior body 3 in the ventral side part 1A, and a back side part 1B. It consists of the same two sheets 31 and 32 that constitute one exterior body 3, and these four sheets are laminated.
  • the eight-layer structure portion is folded so that both side portions 3a and 3a of the strip-shaped outer package 3 cover both longitudinal ends of the absorbent main body 2 when the diaper continuous body 10 is manufactured ( (See FIG. 3 and FIG. 4), because there are two exterior bodies 3 on each of the abdominal part 1A and the back side part 1B, and these four exterior bodies 3, 3 are laminated, As a result, eight sheets 31 and 32 are laminated.
  • elastic members such as the waist elastic member 5 and the waistline elastic member 6 may be interposed between the overlapping sheets 31 and 32, In FIG. 4 described above, the elastic member is omitted from the viewpoint of easy explanation.
  • the 4-layer structure portion will be mainly described, but unless otherwise specified, the 8-layer structure portion is configured in the same manner as the 4-layer structure portion, and the side seal portion 4 is formed.
  • One or both of the sheets (inner layer sheet 32) absorb the laser beam 30 and generate heat.
  • all of the four sheets 31 and 32 constituting the parting planned portion 10 ⁇ / b> C are sheets (nonwoven fabrics) that absorb the laser beam 30 and generate heat.
  • the two sheets of the outer layer sheet 31 and the inner layer sheet 32 that overlap each other in the portion 10C to be divided and in the vicinity thereof may be bonded by an adhesive or the like before irradiation with the laser beam 30, or are not bonded at all. It does not have to be.
  • the diaper continuous body 10 has one surface 10 a in contact with the support member 21, and a parting planned portion 10 C (a part where the side seal part 4 is to be formed) is on the slit-shaped opening 27.
  • a parting planned portion 10 C (a part where the side seal part 4 is to be formed) is on the slit-shaped opening 27.
  • the irradiation point of the laser beam 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 23 and is set so as to follow the movement of the opening 27 along the circumferential direction. Therefore, the laser beam 30 is continuously irradiated for a certain period of time to the parting planned portion 10C located on the opening 27 during the conveyance.
  • the forming materials (fibers, etc.) of the sheets 31 and 32 existing in the parting portion 10C are vaporized by the heat generated by the direct irradiation of the laser light 30 and disappear.
  • the forming material existing in the vicinity of the parting portion 10 ⁇ / b> C is indirectly heated by the laser beam 30 and melted.
  • the vaporized gas is sucked into the pressure head 26 through the air suction port 55 of the pressure head 26 and discharged to the outside.
  • the parting planned part 10C having a four-layer structure is melted to form one sheet sheet laminate (diaper precursor) from the diaper continuous body 10.
  • the cut edges of the four sheets 31 and 32 in the sheet stack of the single sheets generated by the division are cut and separated.
  • the cut edges of the four sheets 31 and 32 in the diaper continuous body 10 are fused to each other.
  • Each of these cutting edges is in a pressurized state (compressed state) by being sandwiched between the support member 21 and the pressure head 26 from before the formation (before the diaper continuous body 10 is divided by irradiation with the laser beam 30). ).
  • the strip-shaped exterior body 3 is divided by the single laser light irradiation, and the exterior body 3 in the two pressurized states generated by the division is thus obtained.
  • the fusion and separation are the same with approximately half the laser output compared to the method of fusing the two fusion places with two laser irradiations.
  • the diaper 1 can be manufactured efficiently by performing the process.
  • the cut edges of the sheets 31 and 32 are heated and melted during the irradiation of the laser beam 30 and immediately after the end of the irradiation, but are separated from the diaper continuous body 10 by the irradiation of the laser beam 30.
  • Each of the leaf diaper precursor and the diaper continuous body 10 is quickly cooled and solidified by the outside air after the irradiation is completed while the pressure state of the support member 21 and the pressure head 26 is maintained.
  • the edge forming material becomes the fused portion 40 which is fused and integrated.
  • the laser beam 30 is such that the irradiation point hits another opening 27 adjacent in the direction opposite to the conveyance direction D. And is irradiated to another parting planned portion 10C located thereabove through the other opening 27.
  • another part 10C to be divided is divided and fused in the same manner as described above, and the other side seal part 4 (fused part 40) that forms a pair with the previously formed side seal part 4 is formed.
  • the pants-type disposable diaper 1 including the exterior body 3 having the pair of side seal portions 4 and 4 is continuously manufactured.
  • the side seal portion 4 has an edge portion of the exterior body 3 in the front body F and an edge portion of the exterior body 3 in the back body R as the longitudinal length of the side seal portion.
  • a seal edge 41 is formed which is joined by a continuous linear fusion part 40 extending in the direction.
  • the thickness T of the fused part 40 is equal to or smaller than the total thickness (Ta + Tb) of the exterior body.
  • the seal edge portion 41 has a shape in which the outer edge 4 a made of the fused portion 40 is recessed toward the inside of the diaper 1 in a cross section orthogonal to the direction in which the side seal portion 4 extends when worn. have. Further, as shown in FIG. 14, the seal edge portion 41 does not have a portion where the constituent fibers of the exterior body 3 leave the fiber shape outside the fused portion 40 in the inner and outer directions P. Therefore, the appearance is good and the touch is improved.
  • the wavelength of the laser beam irradiated to the diaper continuous body 10 is absorbed by the sheets (outer layer sheet 31 and inner layer sheet 32) constituting the outer package 3 and generates heat.
  • the laser beam is used.
  • the “sheet constituting the exterior body” is not limited to the sheet (for example, the outer layer sheet 31 in the above-described embodiment) constituting one surface of the exterior body (the contact surface with the support member 21). Any sheet may be used as long as it constitutes.
  • the laser light applied to the exterior body is a wavelength that is absorbed by the sheet and generates heat for the individual sheets constituting the exterior body depends on the material of the sheet and the wavelength of the laser light to be used. It depends on the relationship.
  • the laser beam may be CO 2 laser, YAG It is preferable to use a laser, an LD laser (semiconductor laser), a YVO 4 laser, a fiber laser, or the like.
  • seat which comprises an exterior body contains polyethylene, a polyethylene terephthalate, a polypropylene etc. as a synthetic resin, as a wavelength which can be absorbed by this sheet
  • the spot diameter of laser light, laser output, and the like can be appropriately selected in consideration of the material and thickness of the sheet constituting the exterior body.
  • a strip-shaped outer package is a stack of four sheets as shown in FIG. 13 (a), or two, three, or five or more sheets. May be.
  • the exterior body 3 in the above embodiment is not divided into the ventral portion 1A and the dorsal portion 1B, but is an hourglass shape extending over the ventral portion 1A, the crotch 1C, and the dorsal portion 1B.
  • the exterior body to be processed according to the present invention is not limited to such a continuous shape, and is, for example, an abdomen placed on the wearer's belly side (front side). It is divided
  • seat member distribute
  • the polymerization pressurizing step includes a front body side (a belt-like stomach side sheet member) of the belt-like exterior body to which the absorbent main body is fixed.
  • a site where the side seal portion is to be formed in the belt-shaped exterior body having a configuration in which the back body side (band-shaped backside sheet member) is superimposed is brought into a pressurized state.
  • both side parts along the conveyance direction of each inner layer sheet 32 were folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2, the width direction (longitudinal direction) of the band-shaped outer layer sheet 31 was more than the band-shaped inner layer sheet 32. Absorbs only the extension part of the outer layer sheet 31 that extends outward from the side edge of the inner layer sheet 32 when the sheets 31 and 32 are overlapped.
  • the body 2 may be folded back so as to cover both ends in the longitudinal direction.
  • the parting plan part 10C of the diaper continuous body 10 is a six-layer structure part in which the opening end part of the waist opening part 8 and its vicinity are overlapped with six sheets, and the other part is four sheets. Becomes a four-layer structure part.
  • belt-shaped inner layer sheet 32, do not need to be folded.
  • the laser type bonding apparatus 20 including the cylindrical roll 23 is used.
  • the laser type bonding apparatus 20 including a flat plate member may be used instead of the cylindrical roll 23.
  • the present invention can be similarly provided for the production of other forms of sheet fusion bodies.
  • the support member has a slit-like opening that is long in the width direction of the sheet laminate, through which laser light irradiated from the second surface side can pass.
  • An air suction part for sucking air from the opening is disposed at a position on the first surface side of the support member so as to face the slit-like opening.
  • the sheet laminate supported on the first surface of the support member is irradiated with laser light from the second surface side along the slit-shaped opening, and the sheet laminate is divided in the width direction.
  • a sheet fusion body having the seal edge is manufactured by fusing the divided edges in an overlapping state, and the gas generated by the division is sucked and removed by the air suction part.
  • the support member has a first surface facing outward and a second surface facing inward, and is formed of a cylinder rotatable in one direction,
  • the pressurizing head includes the air suction portion and can circulate along the peripheral surface of the support member in the same direction as the rotation direction of the support member and at the same speed as the peripheral speed of the support member.
  • ⁇ 3> The sheet according to ⁇ 1> or ⁇ 2>, wherein the air suction part includes an air suction port that extends in the same direction as the slit-like opening extends and is opposed to the slit-like opening. Fusion production equipment.
  • the pressure head includes a local pressure member having a pressure surface that locally pressurizes the sheet laminate supported on the first surface of the support member, ⁇ 3>
  • the local pressurizing members are arranged in a pair such that the pressurization surface extends in the same direction as the direction in which the air suction port extends, and the pressurization surface is located across the air suction port.
  • the pressurizing head further includes a pair of tension applying members that apply tension to the sheet laminate supported on the first surface of the support member, The pair of tension applying members extends in the same direction as the air suction port extends, and is disposed so as to sandwich the pair of local pressure members.
  • the tension applying member is made of a flexible material, and a surface facing the sheet laminate is protruded from the pressurizing surface of the local pressurizing member. Prior to pressurizing the sheet laminate, the pressure surface is deformed so that the pair of tension applying members abut against the sheet laminate and are separated from each other, thereby being positioned between the pair of tension applying members.
  • the slit-shaped opening has a rectangular shape in plan view, and extends in a direction in which the longitudinal direction thereof coincides with a direction intersecting with the conveying direction of the traveling sheet laminate, and a plurality of the slit-shaped openings are provided at predetermined intervals.
  • ⁇ 7> The apparatus for producing a sheet fusion body according to any one of ⁇ 4> to ⁇ 6>, wherein the apparatus is provided with a plurality of the pressure heads.
  • the pressurizing head has a hinge-shaped support portion at one end in the extending direction of the air suction portion, and swinging motion is possible in a plane passing through the rotation shaft of the support member with the support portion as a fulcrum.
  • the apparatus for producing a sheet fusion body according to ⁇ 9> wherein the pressure head is configured to move toward and away from the first surface of the support member.
  • the pressure head can reciprocate along the radial direction of the support member, whereby the pressure head makes contact with and separates from the first surface of the support member.
  • a method for producing a sheet fusion body having a seal edge fused in a state where edges of a plurality of sheets are overlapped A strip-shaped sheet laminate in which a plurality of sheets including at least a part of a resin material are stacked on a first surface of a support member having a first surface and a second surface located on the opposite side thereof over the longitudinal direction.
  • Support, Laser light is emitted from an irradiation head that is disposed on the second surface side of the support member and has a lens that collects laser light toward the sheet laminate that is supported on the first surface of the support member.
  • ⁇ 15> The apparatus according to any one of ⁇ 1> to ⁇ 11>, Used to manufacture a pants-type disposable diaper having an exterior body having a pair of side seal portions, as a sheet fusion body having a seal edge portion fused with the edges of a plurality of sheets overlapping. Pants-type disposable diaper manufacturing equipment.
  • An absorbent main body and an exterior body forming an outer surface of the diaper are provided, and right and left side edges along the longitudinal direction of the exterior body in the front body and left and right side edges along the longitudinal direction of the exterior body in the back body are joined.
  • a pair of side seals, a waist opening, and a pair of leg openings, and the outer body is located on the non-skin contact surface side of the absorbent main body and fixes the absorbent main body
  • the manufacturing apparatus of the underpants type disposable diaper as described in said ⁇ 15> used in order to manufacture a type disposable diaper.
  • ⁇ 17> The absorbent main body manufactured in a separate step is intermittently supplied and fixed on the inner layer sheet constituting the belt-shaped outer package, and then a leg hole is formed in the outer package, Next, the belt-shaped outer package is folded in a direction perpendicular to the conveying direction of the outer package, thereby obtaining a continuous diaper, Next, a pants-type disposable diaper having a pair of side seal portions formed by irradiating the diaper continuous body with a laser beam using a laser-type bonding apparatus and having an exterior body having the pair of side seal portions.
  • the manufacturing apparatus of the underpants type disposable diaper as described in said ⁇ 15> or ⁇ 16> which manufactures 1 continuously.
  • the manufacturing apparatus of the underpants type disposable diaper any one of said ⁇ 15> thru
  • the laser-type bonding apparatus irradiates laser light toward a hollow cylindrical roll that is rotatably driven and a cylindrical support member that is disposed in a hollow portion of the cylindrical roll and forms a peripheral surface portion of the cylindrical roll.
  • the sealing edge portion is excellent in flexibility and touch, and has practically sufficient fusion strength. It is possible to produce a sheet fusion body having the same.

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  • Engineering & Computer Science (AREA)
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  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Textile Engineering (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Toxicology (AREA)
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  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Electromagnetism (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
PCT/JP2014/077793 2013-11-01 2014-10-20 シート融着体の製造装置及び製造方法 WO2015064405A1 (ja)

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JP6002867B1 (ja) * 2015-09-25 2016-10-05 ユニ・チャーム株式会社 吸収性物品の製造方法及び製造装置
CN108135757A (zh) * 2015-10-08 2018-06-08 花王株式会社 短裤型一次性尿布

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JP2017070464A (ja) * 2015-10-06 2017-04-13 花王株式会社 シート融着体の製造装置及び製造方法
JP6556043B2 (ja) * 2015-12-09 2019-08-07 花王株式会社 シート融着体の製造方法及び製造装置
EP3429524B1 (en) 2016-03-15 2019-11-20 The Procter and Gamble Company Methods and apparatuses for separating and positioning discrete articles
JP6942026B2 (ja) * 2017-10-20 2021-09-29 花王株式会社 シート融着体の製造装置及び製造方法
JP6993839B2 (ja) * 2017-10-20 2022-02-04 花王株式会社 シート融着体の製造装置及び製造方法
JP7122955B2 (ja) * 2017-12-25 2022-08-22 花王株式会社 シート融着体の製造装置、シート融着体の製造方法、及び樹脂ヒュームの堆積抑制方法
JP7141925B2 (ja) * 2018-11-22 2022-09-26 花王株式会社 シート融着体の製造装置
JP2020157156A (ja) * 2020-07-03 2020-10-01 花王株式会社 パンツ型使い捨ておむつ

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CN108135757A (zh) * 2015-10-08 2018-06-08 花王株式会社 短裤型一次性尿布

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