WO2014208652A1 - Couche jetable de type culotte - Google Patents

Couche jetable de type culotte Download PDF

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Publication number
WO2014208652A1
WO2014208652A1 PCT/JP2014/066942 JP2014066942W WO2014208652A1 WO 2014208652 A1 WO2014208652 A1 WO 2014208652A1 JP 2014066942 W JP2014066942 W JP 2014066942W WO 2014208652 A1 WO2014208652 A1 WO 2014208652A1
Authority
WO
WIPO (PCT)
Prior art keywords
exterior body
type disposable
elastic member
pants
disposable diaper
Prior art date
Application number
PCT/JP2014/066942
Other languages
English (en)
Japanese (ja)
Inventor
浩美 滝田
好美 山下
学 松井
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480036203.4A priority Critical patent/CN105358110B/zh
Priority to RU2016102419A priority patent/RU2639962C2/ru
Publication of WO2014208652A1 publication Critical patent/WO2014208652A1/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
    • A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15739—Sealing, e.g. involving cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A61F13/4963—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs characterized by the seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1696—Laser beams making use of masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/747—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using other than mechanical means
    • B29C65/7473—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using other than mechanical means using radiation, e.g. laser, for simultaneously welding and severing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B29C66/72941—Non woven mats, e.g. felt coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83435—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts said rollers, cylinders or drums being hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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 pants-type disposable diaper.
  • the side seal part is often formed wide due to its manufacturing process, such a wide side seal part contributes to a decrease in the appearance of the diaper, In particular, it tends to be a hindrance when giving an underwear-like appearance to diapers. Therefore, it is desirable that the width of the side seal portion is as narrow as possible. However, if the width of the side seal portion is narrowed, the visibility is likely to be lowered, so that the operability when peeling the side seal portion tends to be lowered.
  • the width of the side seal portion is narrowed, the bonding strength tends to be lowered, and the elastic member fixed at the side seal portion may be pulled out.
  • the elastic member is colored in a color different from the background color of the abdominal side portion or the back side portion where the elastic member is disposed at least at the end portion located near the side seal portion and the vicinity thereof. ing. At least a part of the elastic member has an end portion located near the side seal portion of the end portion that does not reach the position of the side seal portion.
  • the elastic member non-arrangement region is formed between the side seal portion and the end portion of the elastic member. In the elastic member non-arrangement region, there is no adhesive for joining the elastic members.
  • FIG. 1 is a perspective view schematically showing one embodiment of a pants-type disposable diaper of the present invention.
  • FIG. 2 is a plan view schematically showing an unfolded and extended state of the diaper shown in FIG.
  • FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II of FIG.
  • FIG. 4 is a side view showing a state where the diaper shown in FIG. 1 is mounted.
  • FIG. 5 is a partially broken perspective view schematically showing an elastic sheet used as an outer package of the diaper shown in FIG.
  • FIG. 6 is a perspective view schematically showing a part of the manufacturing process of the diaper shown in FIG.
  • FIG. 7 is a perspective view showing an apparatus suitably used for forming the side seal portion of the diaper shown in FIG.
  • FIG. 8 (a) to 8 (c) are explanatory views for explaining how the side seal portion is formed at the same time when the diaper continuous body is divided using the apparatus shown in FIG.
  • FIG. 9 is a view (a view corresponding to FIG. 8 (c)) showing another example of a method for manufacturing a pants-type disposable diaper using the apparatus shown in FIG. 7.
  • FIG. 10 is a schematic view showing another sheet that is suitably used as the outer package of the diaper shown in FIG.
  • 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 has a crotch part M disposed in the crotch part when worn, and a ventral side part F and a back side part R extending from the front and back of the crotch part M in the front-rear direction of the wearer.
  • the crotch part M is an area in which recessed portions for forming the leg openings 6 and 6 are formed at both side edges along the vertical direction X.
  • a skin opposing surface is a surface turned to a wearer's skin side at the time of wear of a disposable diaper in a disposable diaper or its component (for example, absorptive main part 2), and a non-skin opposing surface is It is a surface in the disposable diaper or a component thereof directed to the side opposite to the skin side (clothing side) when the disposable diaper is 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 main body 2 which is a disposable diaper or its constituent member. Matches the width direction of.
  • the absorbent main body 2 has a vertically long shape in which one direction (vertical direction X) is relatively long, and includes a topsheet 21 that forms a skin facing surface and a non-skin facing surface. A back sheet 22 to be formed and a liquid-retaining absorbent 23 interposed between the two sheets 21 and 22 are provided.
  • the absorbent 23 has a shape that is long in the same direction as the longitudinal direction X. .
  • the absorbent main body 2 has its longitudinal direction aligned with the longitudinal direction X of the diaper 1 in the unfolded and expanded state (the state shown in FIG. 2), and a known joining means (adhesive or the like) at the center of the outer package 3. It is joined by.
  • the top sheet 21, the back sheet 22, and the absorber 23 constituting the absorbent main body 2 various types conventionally used in the technical field can be used without particular limitation.
  • a liquid permeable sheet such as various nonwoven fabrics or perforated films subjected to a hydrophilic treatment can be used.
  • a liquid-impermeable material or a water-repellent material can be used.
  • a resin film, a resin film having fine pores and moisture permeability, a laminate material of a resin film and a nonwoven fabric, and the like can be used.
  • a composite nonwoven fabric having a multilayer structure composed of bond, meltblown, spunbond, or the like, a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, or the like can be used.
  • an absorbent core comprising an absorbent core made of water-absorbing polymer particles and a fiber material such as pulp fiber can be used.
  • the absorbent core is a core wrap sheet such as tissue paper. It may be coated.
  • side cuffs 24 and 24 made of a liquid-resistant or water-repellent and breathable sheet material are provided on both left and right sides of the absorbent main body 2 along the longitudinal direction X. .
  • Each side cuff 24 stands up when the side cuff elastic member 25 arranged in an extended state along the free end contracts, and prevents the liquid from flowing out in the lateral direction Y.
  • the expanded and extended state means that the side seal part 4 is peeled off to make the diaper into an expanded state, and the expanded state of the diaper is extended by the elastic member of each part, so that the design dimensions (the influence of the elastic member is not affected at all). It means a state in which it is expanded until it becomes the same size as when it is expanded in a flat state in the excluded state.
  • the side seal portion 4 is formed by joining the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 in a state where the edge portions overlap each other, and has a fused portion 40 as shown in FIG.
  • the fusion part 40 is formed by fusing the exterior body 3 constituting the abdominal side part F and the exterior body 3 constituting the back side part R in a state where the edges overlap.
  • the fused part 40 extends continuously along the longitudinal direction X of the diaper 1.
  • the fusion means that the outer package 3 containing a thermoplastic resin is joined in its molten state.
  • the side seal portion 4 preferably has a small thickness T1 (see FIG. 3) in addition to the fact that the non-joining portion is substantially absent.
  • T1 the thickness of the side seal part 4
  • the side seal part 4 is made inconspicuous, and an appearance like underwear can be imparted to the diaper 1.
  • the thickness T1 of the side seal portion 4 is preferably 0.2 mm or more, more preferably 0.25 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less.
  • Thickness T1 of the side seal part is determined by applying no load at a magnification of 50 to 200 times by using a microscope (VHX-1000 manufactured by KEYENCE Corp.) or the like at three cross sections separated in the longitudinal direction in the side seal part of one diaper. Observing and obtaining the thickness of the measurement target part in each cross section, it can be obtained as an average value of the three thicknesses.
  • the diaper 1 can be given an appearance like underwear.
  • the side seal part 4 is less noticeable, the operability when the side seal part 4 is peeled off when the diaper 1 is discarded tends to be lowered. Therefore, the diaper of the present invention is devised to improve operability when the side seal portion 4 is peeled off.
  • the waist elastic members 51 a and 51 b arranged along the opening end of the waist opening are end portions 52 a and 52 b positioned closer to the side seal portion 4 among the end portions. However, it does not reach the position of the side seal portion 4 and terminates at a position closer to the inside in the lateral direction Y than the side seal portion 4.
  • the elastic member non-arrangement regions 9 a and 9 b there is no adhesive for joining the waist elastic members 51 a and 51 b to the folded portion of the exterior body 3. That is, in the elastic member non-arrangement regions 9a and 9b, both the waist elastic members 51a and 51b and the adhesive are absent. As a result, in the elastic member non-arranged regions 9a and 9b, no gathers due to the contraction of the waist elastic members 51a and 51b are formed, and the flat sheet form of the outer package 3 is maintained in the wearing state of the diaper 1. Has been.
  • the waist elastic members 51a and 51b are joined to the exterior body 3 by the adhesives 11a and 11b in the stretched state in the inner region in the lateral direction Y than the elastic member non-arranged regions 9a and 9b. Therefore, the gathers resulting from the contraction of the waist elastic members 51a and 51b are formed. Thus, since the gathers are not formed in the elastic member non-arrangement regions 9a and 9b, the position of the side seal portion 4 is easily visible. Further, the elastic member non-arranged regions 9a and 9b have a small thickness, while the inner region in the lateral direction Y is larger than the elastic member non-arranged regions 9a and 9b. The region to be torn can be easily recognized. As shown in FIG.
  • the brightness of 9b is different from that of other regions, particularly the regions adjacent to the elastic member non-arranged regions 9a and 9b.
  • the brightness can be represented by, for example, an L value in the Lab color system.
  • the L value takes a value from 0 to 100, and the larger the numerical value, the higher the brightness.
  • the ratio L2 / L1 between the lightness L1 of the elastic member non-arranged regions 9a and 9b and the lightness L2 of the region adjacent to the elastic member non-arranged regions 9a and 9b is more than 1.
  • the ratio L2 / L1 is preferably 1.02 or more, more preferably 1.04 or more, and is preferably 1.3 or less, more preferably 1.25 or less. Specifically, it is preferably 1.02 or more and 1.3 or less, and more preferably 1.04 or more and 1.25 or less.
  • the ratio L2 / L1 is greater than 1 when the diaper 1 is stretched 1.6 times in the Y direction, or when it is stretched 2.6 times, or in both cases.
  • the 1.6-fold extension generally corresponds to the degree of extension of the diaper when worn by the wearer of the shortest size in the applicable size range of the diaper.
  • 2.6-fold elongation generally corresponds to the degree of elongation of the diaper when worn by the wearer of the longest size in the applicable size range of the diaper.
  • the waist elastic members 51a and 51b are positioned at least near the side seal portion 4 in at least one of the ventral portion F and the back portion R.
  • the end portions 52a and 52b and the vicinity thereof are colored in a color different from the ground color of the ventral side F or the back side R where the waist elastic members 51a and 51b are arranged.
  • the ventral waist part elastic member 51a arranged on the ventral part F has at least the end part 52a and the vicinity thereof, preferably the whole region of the ventral waist part elastic member 51a constituting the ventral part F. It is colored in a color different from the ground color of the exterior body 3.
  • the back side waist portion elastic member 51b disposed on the back side portion F has at least the end portion 52b and the vicinity thereof, or the entire area of the back side waist portion elastic member 51b.
  • the outer body 3 constituting the back side R may be colored in a different color from the ground color, or it may not be.
  • the waist elastic members 51a and 51b colored in a color different from the ground color of the ventral side F or the back side R are from the appearance of the diaper 1, that is, sandwich the waist elastic members 51a and 51b.
  • the exterior body 3 is visible through the watermark.
  • the difference in color between the colors of the waist elastic members 51a and 51b and the ground color of the exterior body 3 is [a value of exterior body ⁇ a value of elastic member].
  • the value is preferably 10 or more, and more preferably 15 or more.
  • the color of the abdominal waist elastic member 51 a disposed on the abdominal side F and the back waist elastic member disposed on the back side R It is also preferable that the color of 51b is different. In addition to the colors of the elastic members 51a and 51b being different, it is also preferable that these colors and the ground color of the exterior body 3 are different.
  • the stretchable sheet 30 constituting the exterior body 3 described above has a configuration in which a thread-like elastic filament is bonded to one surface of an extensible fiber layer mainly composed of nonelastic fibers.
  • an extensible fiber layer mainly composed of nonelastic fibers.
  • two sheets of an outer layer sheet 31 and an inner layer sheet 32 and a plurality of thread-like elastic filaments 33 sandwiched between both sheets 31 and 32 are included.
  • the sheets 31 and 32 are both “extensible fiber layers mainly composed of inelastic fibers” (illustration of inelastic fibers is omitted in FIG. 5).
  • the content of the non-elastic fiber in each of the sheets 31 and 32 mainly composed of non-elastic fibers is preferably 90% by mass or more, more preferably 91% by mass or more, and may be 100% by mass.
  • the sheet 31 forms the outer surface of the diaper 1
  • the sheet 32 forms the inner surface of the diaper 1.
  • the elastic filament 33 extends along the lateral direction Y of the diaper 1.
  • the elastic filament 33 is disposed at least around the waist of the diaper 1, and is preferably disposed over the entire region in the longitudinal direction X of the diaper 1. Furthermore, the elastic filament 33 is disposed in a substantially non-stretched state.
  • the outer layer sheet 31 and the inner layer sheet 32 are both extensible.
  • the sheets 31 and 32 can be extended in the lateral direction Y, which is the direction in which the elastic filament 33 extends.
  • Stretchable means (a) when the constituent fibers themselves of the sheets 31 and 32 are stretched, and (b) even if the constituent fibers themselves are not stretched, the fibers bonded at the intersections are separated or the fibers are This includes the case where the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding or the like, or the constituent fibers are broken, and the sheets 31 and 32 are extended as a whole.
  • the outer layer sheet 31 and the inner layer sheet 32 may already be stretchable in the state of the original fabric before being joined to the elastic filament 33. Alternatively, it is not stretchable in the state of the original fabric before being joined to the elastic filament 33, but is processed so as to be stretchable after being joined to the elastic filament 33, and becomes stretchable. Also good. Specific methods for making the sheet stretchable include heat treatment, roll-to-roll stretching, bite-and-gap stretching with teeth and gears, and tensile stretching with a tenter. In view of a preferable manufacturing method of the stretchable sheet 30 described later, the sheets 31 and 32 are original because the transportability of the sheets 31 and 32 is improved when the elastic filament 33 is fused to the sheets 31 and 32. In the opposite state, it is preferably not stretchable.
  • the outer layer sheet 31 and the inner layer sheet 32 are extensible and substantially inelastic.
  • Elasticity is a property that can be stretched and contracts when released from the stretched force, and the sheets 31 and 32 do not have such a property.
  • the sheets 31 and 32 have elasticity, a fiber containing an elastic resin is required as a constituent fiber thereof, and the fiber containing the elastic resin tends to exhibit a sticky feeling that contributes to lowering the texture of the nonwoven fabric. Therefore, in this embodiment, the sheets 31 and 32 are made substantially inelastic to prevent the texture from being lowered.
  • the elastic filament 33 is formed by being stretched in a state where the elastic resin is melted or softened, as will be described later.
  • Each of the plurality of elastic filaments 33 is substantially continuous over the entire length of the stretchable sheet 30, that is, the entire length in the lateral direction Y of the exterior body 3.
  • the plurality of elastic filaments 33 are arranged so as to extend in one direction, that is, the lateral direction Y without crossing each other. In the present invention, the elastic filaments 33 are allowed to cross unintentionally due to inevitable fluctuations in the manufacturing conditions of the stretchable sheet 30.
  • the plurality of elastic filaments 33 may each extend linearly or may meander while meandering as long as they do not cross each other.
  • the elastic filament 33 is joined to the outer layer sheet 31 and the inner layer sheet 32 in a substantially non-stretched state. Since the elastic filament 33 is not stretched, the stretchable sheet 30 is not relaxed (creeped) due to stretching, and the elastic filament 33 is bonded to the sheets 31 and 32 at the time of storing the original fabric or after processing such as stretching. There is an advantage that there is no decrease in stretchability. Further, there is no deformation due to the tightness of the wound-up raw material. Further, for example, when the elastic filament 33 is stretched twice and bonded to the sheets 31 and 32, if it is temporarily returned to 1.3 times the initial value, it can be stretched only 1.7 times from this state.
  • the elastic filament 33 may have a circular cross section, but in some cases may have an elliptical cross section.
  • the cross section of the elastic filament 33 tends to be elliptical.
  • the elastic filament 33 has an elliptical long axis in the same direction as the plane direction of the stretchable sheet 30 and a short axis in the same direction as the thickness direction of the stretchable sheet 30. Preferably they are arranged.
  • the pitch of the adjacent elastic filaments 33 and 33 is the diameter of the elastic filament 33 from the viewpoint of the stretchable sheet 30 exhibiting sufficient stretchability and good cloth-like texture. Is within the above-mentioned range, preferably 0.1 mm or more, more preferably 0.4 mm or more, and preferably 5 mm or less, more preferably 1 mm or less. More specifically, it is preferably 0.1 mm or more and 5 mm or less, and more preferably 0.4 mm or more and 1 mm or less.
  • the plurality of elastic filaments 33 are joined to the outer layer sheet 31 and the inner layer sheet 32 over the entire length thereof.
  • “bonded over the entire length” does not require that all the fibers in contact with the elastic filament 33 (component fibers of the sheets 31 and 32) are bonded to the elastic filament 33.
  • the elastic filament 33 and the constituent fibers (non-elastic fibers) of the sheets 31 and 32 are bonded to the elastic filament 33 in such a manner that there is no intentionally formed non-bonded portion. Since the elastic filament 33 is bonded to each of the sheets 31 and 32 over the entire length, the bonding force between the elastic filament 33 and the sheets 31 and 32 can be sufficiently increased.
  • the elastic filament 33 is difficult to peel from the sheets 31 and 32. If the elastic filament 33 is peeled off from the sheets 31 and 32, in the natural state (relaxed state), floating occurs between the elastic filament 33 and the sheets 31 and 32, and wrinkles are easily generated in the stretchable sheet 30.
  • the stretchable sheet 30 as a whole lacks a sense of unity.
  • the non-elastic fibers buried in the elastic filament 33 may be all or a part of the non-elastic fibers existing around the elastic filament 33.
  • the term “buried” as used herein means that at the intersection of the inelastic fiber and the elastic filament 33, the portion of the inelastic fiber existing at the intersection is the portion of the elastic filament 33 existing at the intersection. A state that has been submerged. Therefore, the state in which the non-elastic fibers and the elastic filaments 33 are joined by dots or lines on their surfaces is not included in the burial according to the present invention.
  • the non-elastic fiber is preferably embedded in the elastic filament 33 with a degree of half or more of its diameter.
  • the bonding strength between the elastic filament 33 and the non-elastic fibers contained in the outer layer sheet 31 and the inner layer sheet 32 is as described above, whereby the bonding strength between the elastic filament 33 and the sheets 31 and 32 is increased, and the elastic sheet.
  • peeling between the two is less likely to occur.
  • the stretchable sheet 30 is stretched, the sheets 31 and 32 follow the stretch of the elastic filament 33 and stretch with good responsiveness. Therefore, there is an advantageous effect that the stretchability of the stretchable sheet 30 is improved. Is done.
  • the elastic filament 33 and the non-elastic fibers included in the sheets 31 and 32 are joined as described above, the elastic filament 33 and the sheets 31 and 32 are in close contact with each other, and the presence of the elastic filament 33 is present. Since it is more difficult to feel the step between the portion that is present and the portion that is not present, there is also an advantageous effect that the texture of the stretchable sheet 30 is improved.
  • the non-elastic fiber is fused with the elastic filament 33 and embedded in the elastic filament 33. State "is obtained.
  • this manufacturing method no heat is applied to the sheets 31 and 32, and the elastic filaments 33 are fused to the sheets 31 and 32 before the elastic filaments 33 obtained by melt spinning are solidified. Only the fibers existing around 33 are bonded to the elastic filament 33, and the fibers located further away from the fibers maintain the texture of the sheets 31 and 32. Therefore, the texture of the stretchable sheet 30 is good. There is an advantage that it is kept.
  • the elastic filament 33 in the stretchable sheet 30 is joined to the sheets 31 and 32 by melting the elastic filament 33 in a state where the fibers (non-elastic fibers) constituting the sheets 31 and 32 are buried in the elastic filament 33. It was made by wearing, not using an adhesive such as a hot melt adhesive. Therefore, there is no adhesive between the sheets 31 and 32 (extensible fiber layer mainly composed of non-elastic fibers) and the elastic filaments 33 bonded thereto.
  • the stretchable sheet 30 is stretchable in the same direction as the direction in which the elastic filament 33 extends (lateral direction Y).
  • the stretchability of the stretchable sheet 30 is expressed due to the elasticity of the elastic filament 33.
  • the stretchable sheet 30 is stretched in the same direction as the direction in which the elastic filament 33 extends, the elastic filament 33 and the sheets 31 and 32 extend.
  • the stretching of the stretchable sheet 30 is released, the elastic filament 33 contracts, and the sheets 31 and 32 return to the state before stretching as the contraction occurs.
  • the stretchable sheet 30 there is no other elastic filament bonded in a state orthogonal to the elastic filament 33. Therefore, the stretchable sheet 30 is stretched in the lateral direction Y, which is the direction in which the elastic filament 33 extends. In some cases, the stretchable sheet 30 stretches in the transverse direction Y with little so-called width shrinkage.
  • the material for forming the stretchable sheet 30 will be described.
  • the fibers constituting the outer layer sheet 31 and the inner layer sheet 32 extendensible fiber layer mainly composed of inelastic fibers
  • substantially inelastic inelastic fibers are used.
  • Specific examples include fibers made of polyester such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamide, and the like.
  • the fibers constituting the sheets 31 and 32 may be short fibers or long fibers, and may be hydrophilic or water repellent.
  • a core-sheath type or side-by-side type composite fiber a split fiber, a modified cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can be used. These fibers can be used alone or in combination of two or more.
  • the thicknesses of the outer layer sheet 31 and the inner layer sheet 32 are each preferably 0.05 mm or more, more preferably 0.1 mm or more, and preferably 5 mm or less, more preferably 1 mm or less. More specifically, it is preferably 0.05 mm or more and 5 mm or less, and more preferably 0.1 mm or more and 1 mm or less.
  • the thickness of the sheet was measured by sandwiching the measurement target sheet between flat plates with a load of 0.5 cN / cm 2 , and using three microscopes (VHX-manufactured by KEYENCE) 1000) and the like, and the thickness is obtained for each cross section, and the average value of the thicknesses at three locations can be obtained.
  • the basis weights of the sheets 31 and 32 are each preferably 3 g / m 2 or more, more preferably 5 g / m 2 or more, and preferably 100 g / m 2 or less, from the viewpoints of texture, thickness, and design properties. More preferably, it is 30 g / m 2 or less. More specifically, it is preferably 3 g / m 2 or more and 100 g / m 2 or less, more preferably 5 g / m 2 or more and 30 g / m 2 or less.
  • the basis weight of the plurality of elastic filaments 33 arranged between the sheets 31 and 32 is preferably 3 g / m 2 or more from the viewpoints of stretchability, texture, thickness, cost, and the like.
  • it is 4 g / m 2 or more, preferably 30 g / m 2 or less, more preferably 15 g / m 2 or less. More specifically, it is preferably 3 g / m 2 or more and 30 g / m 2 or less, more preferably 4 g / m 2 or more and 15 g / m 2 or less.
  • the elastic filament 33 is made of, for example, a thermoplastic elastomer or rubber.
  • a thermoplastic elastomer when used as a raw material, it can be melt-spun using an extruder in the same manner as a normal thermoplastic resin, and the elastic filament thus obtained is easily heat-sealed. 30.
  • the thermoplastic elastomer include styrene such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene).
  • olefin-based elastomers ethylene-based ⁇ -olefin elastomers, propylene-based elastomers copolymerized with ethylene, butene, octene, etc.
  • polyester-based elastomers polyurethane-based elastomers, and the like.
  • Two or more kinds can be used in combination.
  • core-sheath type or side-by-side type composite fibers made of these resins can also be used.
  • the elastic filament 33 extends over the entire length of the diaper 1 in the lateral direction Y, the end of the elastic filament 33 reaches the side seal portion 4. Therefore, the elastic filament 33 exists in the elastic member non-arrangement regions 9a and 9b described above. However, since the elastic filament 33 is not bonded and fixed by an adhesive, it does not become a target of presence or absence of the elastic member non-arrangement regions 9a and 9b. Only the elastic member joined by the adhesive is subject to presence / absence in the elastic member non-arrangement regions 9a and 9b.
  • the diaper 1 of this embodiment can be suitably manufactured by the manufacturing method described below, for example.
  • the manufacturing method of the diaper 1 of the present embodiment is such that the exterior body continuous body on the abdomen F side and the exterior body continuous body on the back side R side are overlapped to obtain an exterior body continuous laminate, and the exterior body continuous laminate A step of forming the side seal portion 4 by fusing a portion where the side seal portion 4 is to be formed in the body.
  • a hot melt adhesive is continuously or intermittently applied over the entire length of the waist elastic members 51a and 51b by an adhesive coating machine (not shown). However, the application of the adhesive is controlled so that the waist elastic members 51a and 51b are not bonded to either the outer layer sheet 31 or the inner layer sheet 32 in the side seal portion formation planned portion 110C described later.
  • leg holes LH are formed at predetermined locations of the strip-shaped exterior body 3 in which the absorbent main body 2 and the waist elastic members 51 a and 51 b are arranged.
  • 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 (direction perpendicular to the longitudinal direction of the strip-shaped exterior body 3) so that the abdominal side F side and the back side R side overlap. More specifically, as shown in FIG. 6, both side portions 3 a, 3 a along the longitudinal direction (conveying direction MD) of the strip-shaped exterior body 3 are folded back so as to cover the waist elastic member 51. Then, the exterior body 3 is folded in two along the width direction CD together with the absorbent main body 2. That is, the exterior body continuum on the ventral side F and the exterior body continuum on the back side R are overlapped.
  • the longitudinal direction (conveying direction MD, Machine Direction) of the strip-shaped exterior body 3 coincides with the lateral direction Y of the diaper 1, and the width direction CD (Cross machine Direction) of the strip-shaped exterior body 3 is in the longitudinal direction X of the diaper 1.
  • a diaper continuous body 110 (exterior body continuous lamination) in which a plurality of precursors of diapers 1 (pants-type disposable diapers in which a pair of side seal portions 4 and 4 are not formed) is continuous in one direction (lateral direction Y). Body) is obtained.
  • FIG. 7 shows a suitable laser fusing device 120 used for forming the side seal portion 4.
  • the side seal part 4 can be successfully formed in the outer side of the fusion part 40 in the lateral direction Y in which the non-joint part is substantially absent and the side seal part 4 has a small thickness. Can do.
  • the sheet laminated body brought into contact with the supporting member having a pressure state is absorbed by the sheet constituting the sheet laminated body from the supporting member side through the light passing portion and generates heat.
  • the sheet laminated body is divided, and at the same time, the cut edges of the exterior body 3 in the pressurized state generated by the division are fused to form the fused portion. 40 is formed.
  • the laser-type bonding device 120 is arranged in a hollow cylindrical roll 123 having a cylindrical (annular) support member 121 that is rotationally driven in the direction of arrow A, and in a hollow portion of the support member 121.
  • a belt type pressure device 126 provided with 125c.
  • the laser-type bonding apparatus 120 includes a tension adjusting mechanism (not shown) that can adjust the tension of the pressure belt 124 wound around the outer peripheral surface of the annular support member 121 (the peripheral surface portion of the cylindrical roll 123). By adjustment, the pressure applied to the diaper continuous body 110 (sheet laminated body) can be appropriately adjusted by the support member 121 and the pressure belt 124.
  • the diaper continuous body 110 is a precursor for producing the diaper 1 of the present embodiment, and has a shape in which a plurality of diapers 1 are arranged along the lateral direction Y. In this diaper continuous body 110, the waist elastic members 51a and 51b are not joined to the exterior body 3 in the planned cutting portion 110C and the vicinity thereof, and are in a non-joined state.
  • the support member 121 forms a peripheral surface portion (contact portion with the workpiece) of the cylindrical roll 123, and is sandwiched between a pair of annular frames 122 and 122 that form both left and right edge portions of the cylindrical roll 123. It is fixed.
  • the support member 121 is composed of a single annular member having the same length as the circumferential length of the annular frame 122, for example, and has heat resistance such as a metal material such as iron, aluminum, stainless steel, copper, or ceramics. Made of material.
  • the support member 121 has a light passage portion through which laser light can pass.
  • the support member 121 has a slit-shaped opening 127 that penetrates the support member 121 in the thickness direction as a light passage portion.
  • the opening 127 has a rectangular shape in plan view, and its longitudinal direction coincides with the width direction of the support member 121 (direction parallel to the rotation axis of the cylindrical roll 123), so that the circumference of the cylindrical support member 121 is A plurality are formed at predetermined intervals in the direction.
  • the support member 121 allows the laser light to pass through the opening 127, but does not allow the laser light to pass through (transmits) at portions other than the opening 127.
  • the opening 127 in the support member 121 1) In addition to a method of drilling the opening 127 in a predetermined portion of the support member 121 by etching, punching, laser processing, or the like, 2) As the support member 121, A method of using a plurality of curved rectangular members in place of one annular member, and arranging the plurality of members between a pair of frame bodies 122, 122 at a predetermined interval in the circumferential direction of the frame body 122 Is mentioned. In the method 2), the interval between two adjacent members is a slit-shaped opening 127.
  • the light passing portion through which the laser light can pass is composed of a slit-shaped opening 127 that penetrates the support member 121 in the thickness direction, and thus overlaps with the opening 127 in the diaper continuous body 110.
  • the part, that is, the part to be divided 110 ⁇ / b> C is only sandwiched by the pressure belt 124 and is not sandwiched between the support member 121 and the pressure belt 124. Strictly speaking, therefore, the pressure that is generated by being sandwiched between the members 121 and 124 is not generated in the parting portion 110C.
  • the belt-type pressure device 126 includes an endless pressure belt 124 and three rolls 125a, 125b, and 125c that rotate in a state where the pressure belt 124 is bridged.
  • the rolls 125a, 125b, and 125c may be drive rolls or driven rolls that rotate with the cylindrical roll 123.
  • the pressure belt 124 rotationally drives any one or more of the rolls 125a, 125b, and 125c, and moves at the same speed as the cylindrical roll 123 (support member 121).
  • the support member 121 and the pressure belt 124 are preferably maintained in a predetermined temperature range by air cooling, water cooling, or the like.
  • the pressure belt 124 a heat-resistant metal or resin belt that can withstand the heat generated during processing can be used, and it is made of a metal material such as iron, aluminum, or stainless steel.
  • a belt that does not transmit the laser beam irradiated to the diaper continuous body 110, which is a workpiece, is usually used. it can.
  • an irradiation head 135 that irradiates a laser beam 130 toward the support member 121 that forms the peripheral surface portion of the cylindrical roll 123 is provided in the hollow portion of the hollow cylindrical roll 123 (support member 121). ing.
  • the irradiation head 135 is a galvano scanner that freely scans the laser beam 130, a mechanism for moving the laser beam 130 back and forth in a direction parallel to the rotation axis of the cylindrical roll 123, and the diaper continuum 110 on the support member 121.
  • the irradiation point of the laser beam 130 is set in both directions of the circumferential direction of the cylindrical roll 123 and the direction parallel to the rotational axis of the cylindrical roll 123 perpendicular to the circumferential direction. It can be moved arbitrarily.
  • the diaper continuous body 110 includes a support member 121 that forms a peripheral surface portion of a cylindrical roll 123 that is rotationally driven in the direction of arrow A in a state where a predetermined tension is applied by a guide roll (not shown). After being introduced onto the outer surface and transported by a predetermined distance in the circumferential direction by the rotation of the cylindrical roll 123 so as to be wound around the support member 121, it is separated from the support member 121 by an unillustrated lead roll, nip roll or the like. In this way, the diaper continuum 110 is wound around the support member 121 forming the peripheral surface portion of the cylindrical roll 123 with a predetermined tension and conveyed so as to be in pressure contact with the pressure belt 124.
  • the diaper continuous body 110 is made of a synthetic resin.
  • the diaper continuum 110 can be more efficiently compressed.
  • the diaper continuum 110 under compression is irradiated with laser light and divided, It becomes possible to fuse the cutting edges of a plurality of sheets constituting the divided portion more securely, and in the side seal portion 4 Further improvement in fusion strength of the destination unit is achieved.
  • the rotation angle of the support member 121 (cylindrical roll 123) from when the diaper continuous body 110 is introduced onto the support member 121 to when the diaper continuous body 110 leaves the diaper continuous body 110 can be, for example, 90 degrees or more and 270 degrees or less. Is 120 degrees or more and 270 degrees or less.
  • the range of the angle at which the diaper continuous body 110 is pressed against the support member 121 by the pressure belt 124 is 360 ° when the entire circumference of the cylindrical support member 121 (cylindrical roll 123) is pressed.
  • it is preferably 90 degrees or more, more preferably 120 degrees or more, and preferably 270 degrees or less, more preferably 270 degrees or less.
  • it is preferably 90 degrees or more and 270 degrees or less, and more preferably 120 degrees or more and 270 degrees or less.
  • one surface 110 a is formed on the peripheral surface portion of the cylindrical roll 123.
  • the diaper continuum 110 in contact with the outer surface of the support member 121 and having a slit-shaped opening 127 through which the laser beam 130 can pass is pressed from the support member 121 side to the pressed diaper continuous body 110.
  • the diaper continuum 110 is divided by irradiating the laser beam 130 through the, and at the same time, the cut edges of the plurality of sheets in the pressurized state generated by the division are fused together, The seal part 4 is formed.
  • the other surface 110 b of the diaper continuum 110 that is in contact with the support member 121 (see FIG. 8A.
  • One surface 110 a that is a contact surface with the support member 121 and Is pressed against the continuous surface of the diaper 110 in that state by irradiating the laser beam 130 through the slit-shaped opening 127 from the support member 121 side.
  • the diaper 1 having the side seal portion 4 is continuously manufactured. In this way, the irradiation of the laser beam 130 is performed on the diaper continuum 110 that is in a pressurized state by being sandwiched between the support member 121 and the pressure belt 124. It is preferable from the viewpoint of reliably fusing the cut edge portions and improving the fusing strength of the side seal portion 4.
  • FIGS. 8A to 8C are views for explaining a state in which the side seal portion 4 is formed at the same time as the diaper continuous body 110 is divided using the laser-type bonding apparatus 120.
  • FIG. 1 schematically shows a portion 110C to be divided by the laser beam 130 of the diaper continuum 110 and its vicinity.
  • segmentation scheduled parts of the diaper continuous body 110 are the center of the conveyance direction A in the area
  • the parting plan part 110C is a four-layer structure part in which, for example, four sheets are stacked. As shown in FIG.
  • the four-layer structure portion is composed of two sheets (outer layer sheet 31 and inner layer sheet 32) on the ventral side F and two sheets 31 and 32 on the back side R. These four sheets are laminated.
  • the elastic filament 33 is interposed between the overlapping sheets 31 and 32. However, in FIGS. 6 (a) to 6 (c), the elastic member filament 33 is not shown for easy explanation. Yes.
  • the outer layer sheet 31 constituting one surface 110a (the contact surface with the support member 121) of the diaper continuous body 110 and a sheet other than the sheet constituting the one surface 110a (inner layer)
  • the sheet 32) is a sheet in which either one or both absorb the laser beam 130 and generate heat. Further, the two overlapping sheets in the vicinity of the parting portion 110C and the vicinity thereof may be joined by an adhesive or the like before irradiation with the laser light 130, or may not be joined at all.
  • the diaper continuous body 110 is arranged in the direction of arrow A so that one surface 110a is in contact with the support member 121 and the parting portion 110C is located on the slit-shaped opening 127.
  • the pressure belt 124 While being introduced onto the rotating support member 121 and being pressed against the other surface 110b, the pressure belt 124 is pressed in the thickness direction while being conveyed in the arrow A direction.
  • the laser beam 130 is irradiated from the support member 121 side through the opening 127 to the parting portion 110C in a pressurized state.
  • the irradiation point of the laser beam 130 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 123, and is set to move following the movement of the opening 127 along the circumferential direction. Therefore, the laser beam 130 is continuously irradiated for a certain period of time to the parting planned portion 110C located on the opening 127 during the transportation.
  • the forming material (synthetic fiber, etc.) of the sheets 31 and 32 existing in the parting planned part 110C is vaporized by the heat generated by the direct irradiation of the laser light 130, and the diaper continuous part
  • the forming material which disappears from the region and is present in the vicinity of the portion 110C to be divided is indirectly heated by the laser beam 130 and melted.
  • the part to be cut 110C is melted and one diaper 1 is separated from the diaper continuous body 110.
  • the diaper continuous body 110 is cut.
  • the diaper continuous body 110 is divided by a single laser light irradiation, and the sheet is in two pressurized states generated by the division.
  • 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. It can be carried out in a process, and the diaper 1 can be manufactured efficiently. Moreover, since fusion and parting can be performed in the same process, a non-joint part in which the cut edges of the sheet are not fused is not generated, so that the appearance of the diaper 1 is improved.
  • the cut edges of the sheets 31 and 32 are heated and melted during the irradiation of the laser beam 130 and immediately after the end of the irradiation, but each one separated from the diaper continuous body 110 by the irradiation of the laser beam 130.
  • the leaf diaper and the diaper continuum 110 are easily cooled by the contact of the support member 121 after the irradiation is completed, while being pressed by the support member 121 and the pressure belt 124. Then, it is quickly cooled and solidified by heat transfer to the pressure belt 124, and the material for forming the cutting edge including the adhesive is fused and integrated.
  • the fusion part 40 By forming the fusion part 40 in this way, one of the pair of side seal parts 4 and 4 in one diaper 1 is formed.
  • the cutting edge portions of the sheets 31 and 32 may be forcibly cooled by using known cooling means such as a suction device or an exhaust device to promote the formation of the fused portion 40.
  • the elastic members 51a and 51b do not exist at the position where the gap exists, there is an advantage that the side seal portion 4 is easily torn when the side seal portion 4 is torn and the diaper 1 is taken off. In contrast, if there is an elastic member in the side seal portion 4, when the side seal portion 4 is torn, the elastic member is stretched and the elastic member is not easily cut. May occur.
  • the diaper continuous body When the diameter ⁇ of the spot of the laser beam 130 at 110 (the portion irradiated with the laser beam 130) is small (when ⁇ / W is less than 1), it is formed by irradiation with the laser beam 130 as shown in FIG.
  • the pair of side seal portions 4, 4 is a portion overlapping the opening 127 in the diaper continuous body 110 (a pair of opening edges along the direction orthogonal to the conveying direction A of the slit-shaped opening 127 in plan view) A portion sandwiched between the two).
  • the fused portion 40 can be formed.
  • the measurement target part (side seal part) is sandwiched between flat plates, and three cross-sections separated in the longitudinal direction in one diaper are observed at a magnification of 50 to 200 times with a microscope (VHX-1000 manufactured by KEYENCE). In each cross section, the thickness of the part to be measured can be obtained, and the thickness can be obtained as an average value of the three thicknesses.
  • the joining part 63 has comprised the joining part row
  • FIG. By employing such an exterior body 3, it is possible to form a ridge having a good appearance.
  • the diaper of the said embodiment had the exterior body 3 covering the back side part R through the crotch part C from the abdominal side part F, and the absorptive main body arrange
  • the present invention is applied to a pants-type disposable diaper in which an absorbent main body straddles between a ventral sheet member including a waist circumference elastic member and a back side sheet member similarly including a waist circumference elastic member. May be.
  • This invention discloses the following underpants type disposable diaper regarding embodiment mentioned above further.
  • ⁇ 1> A pair of sides formed by joining the crotch, the abdominal side and the back side extending from the front and back of the crotch, both side edges of the abdomen, and both side edges of the back side
  • a pants-type disposable diaper comprising a seal portion and having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular thereto;
  • the side seal portion has a fusion portion that continuously extends along the longitudinal direction of the diaper, and the non-joint portion is substantially non-externally disposed laterally outward of the diaper from the fusion portion.
  • a plurality of elastic members are joined to the ventral portion and the dorsal side portion by an adhesive under an extended state,
  • the elastic member is colored in a color different from the background color of the abdominal side portion or the back side portion where the elastic member is disposed at least at the end portion located near the side seal portion and the vicinity thereof. And At least a part of the elastic member has an end portion located near the side seal portion of the end portion that does not reach the position of the side seal portion.
  • the elastic member non-arrangement region is formed between the side seal portion and the end portion of the elastic member.
  • a pants-type disposable diaper in which the adhesive for joining the elastic member is absent in the elastic member non-arrangement region.
  • ⁇ 5> It further has an exterior body, and a waist elastic member disposed on the exterior body,
  • the color difference between the color of the waist elastic member and the ground color of the exterior body is represented by [a value of exterior body ⁇ a value of elastic member], and the value is preferably 10 or more
  • ⁇ 6> And further comprising an exterior body and an abdominal waist elastic member disposed on the abdomen side of the exterior body, The abdomen waist elastic member is colored in a color different from the ground color of the exterior body constituting the abdomen, at least at the end portion and in the vicinity thereof, preferably the entire region of the abdomen waist elastic member.
  • ⁇ 7> ⁇ 1> to ⁇ 6> further comprising an exterior body, the exterior body including an outer layer sheet and an inner layer sheet, and the outer layer sheet and the inner layer sheet are configured such that constituent fibers themselves are elongated.
  • the pants-type disposable diaper according to any one of the above.
  • the outer body further includes an outer layer sheet and an inner layer sheet, and the outer layer sheet and the inner layer sheet may be separated from each other at the intersection even if the constituent fibers themselves do not stretch.
  • the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding of the fibers and the like, and the constituent fibers are broken, so that the outer layer sheet and the inner layer sheet as a whole can be stretched ⁇ 1.
  • the pants-type disposable diaper according to any one of ⁇ 7>.
  • the exterior body further includes an outer layer sheet and an inner layer sheet, and each of the outer layer sheet and the inner layer sheet is composed of two or more components of low melting point component and high melting point component.
  • each of the outer layer sheet and the inner layer sheet is a pants-type disposable diaper according to ⁇ 9>, in which constituent fibers (non-elastic fibers) are joined at fiber intersections by thermal fusion of at least a low melting point component.
  • ⁇ 12> The underpants type according to any one of ⁇ 1> to ⁇ 11>, wherein when the diaper is measured from the outside of the exterior body, the lightness of the elastic member non-arranged region is different from the lightness of the other region Disposable diapers.
  • the ratio L2 / L1 between the lightness L1 of the elastic member non-arranged region and the lightness L2 of the other region is preferably 1.02 or more, more preferably 1.
  • the pants-type disposable diaper according to ⁇ 12> which is 04 or more.
  • the ratio L2 / L1 between the lightness L1 of the elastic member non-arranged region and the lightness L2 of the other region is preferably 1.3 or less, more preferably 1.
  • ⁇ 16> The pants-type disposable diaper according to ⁇ 15>, wherein the gap and the elastic member are located at the same position in the longitudinal direction.
  • the elastic member non-arrangement region is formed in at least one of an upper region and a lower region in the vertical direction of the side seal portion.
  • the elastic member non-arrangement region is the underpants type disposable diaper according to ⁇ 17>, which is formed only in the upper region of the side seal portion in the vertical direction X.
  • the waist area of the ventral side and the back side is configured to include an elastic sheet having a configuration in which a thread-like elastic filament is bonded to one surface of an extensible fiber layer mainly composed of non-elastic fibers,
  • the pants-type disposable diaper according to ⁇ 19> wherein the elastic filament is disposed between two sheets constituting the stretchable sheet, and no adhesive is present between the sheet and the elastic filament.
  • the pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 20>.
  • the manufacturing method of the pants type disposable diaper any one of ⁇ 21>,
  • the exterior body continuous body on the abdomen side and the exterior body continuous body on the back side are overlapped to obtain an exterior body continuous laminate, and the formation site of the side seal portion in the exterior body continuous laminate is determined.
  • the manufacturing method of a pants-type disposable diaper which has the process of fusing and forming this side seal part.
  • the side seal portion having a fused portion fused in a state where edges of both side edges of the abdomen side portion of the exterior body and both side edge portions of the back side portion of the exterior body overlap; Having a step of forming using a type fusing device, At least some of the sheets constituting the exterior body include a resin material, A light passage portion through which laser light can pass through one surface of the sheet laminate in which both side edge portions of the abdomen side portion of the exterior body and both side edge portions of the back side portion of the exterior body are overlapped.
  • the sheet laminated body brought into contact with the supporting member having a pressure state is absorbed by the sheet constituting the sheet laminated body from the supporting member side through the light passing portion and generates heat.
  • the sheet laminated body is divided, and at the same time, the cut edges of the outer package in a pressurized state generated by the division are fused to form the fused portion.
  • the manufacturing method of the underpants type disposable diaper of description ⁇ 27> The method for producing a pants-type disposable diaper according to any one of ⁇ 22> to ⁇ 26>, wherein the sheet constituting the exterior body is preferably not stretchable in a state of the original fabric. ⁇ 28> The exterior body continuum on the ventral side and the exterior body continuum on the back side are overlapped to obtain an exterior body continuous laminate, and the formation site of the side seal portion in the exterior body continuous laminate is melted. ⁇ 1> thru
  • the side seal portion having a fused portion fused in a state where edges of both side edges of the abdomen side portion of the exterior body and both side edge portions of the back side portion of the exterior body overlap;
  • Manufactured by a method of manufacturing a pants-type disposable diaper having a step of forming using a type fusing device,
  • At least some of the sheets constituting the exterior body include a resin material,
  • the sheet laminated body brought into contact with the supporting member having a pressure state is absorbed by the sheet constituting the sheet laminated body from the supporting member side through the light passing portion and generates heat.
  • the sheet laminated body is divided, and at the same time, the cut edges of the outer package in a pressurized state generated by the division are fused to form the fused portion.
  • ⁇ 31> The pants-type disposable diaper according to any one of ⁇ 28> to ⁇ 30>, wherein the elastic filament is formed by being stretched in a state where an elastic resin is melted or softened.
  • Heat is not applied to the sheet constituting the outer package, and the elastic filament obtained by melt spinning is manufactured by fusing the elastic filament to the sheet before solidifying ⁇ 28>.
  • the operability when the side seal portion of the diaper is peeled off is improved, and the diaper can be easily replaced.

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

Abstract

La présente invention concerne une couche, dans laquelle des éléments élastiques (51a, 51b) sont disposés par fixation des éléments élastiques (51a, 51b) dans un état étiré respectivement à une partie avant (F) et une partie arrière (R) avec un adhésif. Les parties d'extrémité (52a, 52b) des éléments élastiques (51a, 51b) et les voisinages de celles-ci sont colorés en une couleur différente de la couleur d'arrière-plan de la partie avant (F) et la partie arrière (R). Les parties d'extrémité (52a, 52b) des éléments élastiques (51a, 51b) n'atteignent pas une partie latérale scellée (4), de sorte que des régions (9a, 9b) n'ayant pas d'élément élastique soient présentes entre la partie latérale scellée (4) et les parties d'extrémité (52a, 52b) des éléments élastiques (51a, 51b). Dans les régions (9a, 9b) n'ayant pas d'élément élastique, l'adhésif pour fixer les éléments élastiques (51a, 51b) est absent.
PCT/JP2014/066942 2013-06-28 2014-06-26 Couche jetable de type culotte WO2014208652A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480036203.4A CN105358110B (zh) 2013-06-28 2014-06-26 短裤型一次性尿布
RU2016102419A RU2639962C2 (ru) 2013-06-28 2014-06-26 Одноразовый подгузник в форме трусов

Applications Claiming Priority (4)

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JP2013-137399 2013-06-28
JP2013137399 2013-06-28
JP2014050686A JP5828463B2 (ja) 2013-06-28 2014-03-13 パンツ型使い捨ておむつ
JP2014-050686 2014-03-13

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WO2014208652A1 true WO2014208652A1 (fr) 2014-12-31

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CN (1) CN105358110B (fr)
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WO2020047073A1 (fr) * 2018-08-31 2020-03-05 Kimberly-Clark Worldwide, Inc. Procédés et systèmes de découpe ou de perforation d'une bande à l'aide d'un laser
US10806635B2 (en) 2016-03-15 2020-10-20 The Procter & Gamble Company Methods and apparatuses for separating and positioning discrete articles
IT201900006627A1 (it) * 2019-05-08 2020-11-08 Bulgarelli Production S R L Metodo di lavorazione per la realizzazione di articoli, impianto per l’esecuzione di tale metodo di lavorazione e articoli ottenuti con tale procedimento.
TWI733700B (zh) * 2015-10-08 2021-07-21 日商花王股份有限公司 褲型拋棄式尿布及其製造方法
EP4180014A1 (fr) * 2021-11-12 2023-05-17 Fameccanica.Data S.p.A. Procédé et appareil de production de vêtements absorbants lavables
RU2809046C2 (ru) * 2018-08-31 2023-12-06 Кимберли-Кларк Ворлдвайд, Инк. Способ резки или перфорирования полотна лазером (варианты)

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WO2017173645A1 (fr) 2016-04-08 2017-10-12 The Procter & Gamble Company Article pouvant être porté comportant un dessin
JP6220923B1 (ja) * 2016-06-03 2017-10-25 花王株式会社 吸収性物品
CN111867813B (zh) * 2018-01-31 2023-03-28 株式会社瑞光 伸缩性复合片的制造方法、伸缩性复合片以及采用该伸缩性复合片的一次性穿戴物品
JP6505897B2 (ja) * 2018-03-12 2019-04-24 大王製紙株式会社 パンツタイプ使い捨て製品
CN113226237B (zh) * 2018-12-28 2022-10-04 尤妮佳股份有限公司 吸收性物品
MX2022004043A (es) * 2019-10-22 2022-07-19 Essity Hygiene & Health Ab Prenda tipo calzon y metodo para la produccion del mismo.

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TWI733700B (zh) * 2015-10-08 2021-07-21 日商花王股份有限公司 褲型拋棄式尿布及其製造方法
US10806635B2 (en) 2016-03-15 2020-10-20 The Procter & Gamble Company Methods and apparatuses for separating and positioning discrete articles
WO2020047073A1 (fr) * 2018-08-31 2020-03-05 Kimberly-Clark Worldwide, Inc. Procédés et systèmes de découpe ou de perforation d'une bande à l'aide d'un laser
GB2591674A (en) * 2018-08-31 2021-08-04 Kimberly Clark Co Methods and systems for cutting or perforating a web with a laser
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GB2591674B (en) * 2018-08-31 2023-07-05 Kimberly Clark Co Methods and systems for cutting or perforating a web with a laser
RU2809046C2 (ru) * 2018-08-31 2023-12-06 Кимберли-Кларк Ворлдвайд, Инк. Способ резки или перфорирования полотна лазером (варианты)
IT201900006627A1 (it) * 2019-05-08 2020-11-08 Bulgarelli Production S R L Metodo di lavorazione per la realizzazione di articoli, impianto per l’esecuzione di tale metodo di lavorazione e articoli ottenuti con tale procedimento.
EP4180014A1 (fr) * 2021-11-12 2023-05-17 Fameccanica.Data S.p.A. Procédé et appareil de production de vêtements absorbants lavables

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RU2016102419A (ru) 2017-08-03
RU2639962C2 (ru) 2017-12-25
JP2015027428A (ja) 2015-02-12
CN105358110A (zh) 2016-02-24
CN105358110B (zh) 2019-03-19
JP5828463B2 (ja) 2015-12-09

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