WO2016159095A1 - Couche jetable de type sous-vêtement - Google Patents

Couche jetable de type sous-vêtement Download PDF

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Publication number
WO2016159095A1
WO2016159095A1 PCT/JP2016/060424 JP2016060424W WO2016159095A1 WO 2016159095 A1 WO2016159095 A1 WO 2016159095A1 JP 2016060424 W JP2016060424 W JP 2016060424W WO 2016159095 A1 WO2016159095 A1 WO 2016159095A1
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WO
WIPO (PCT)
Prior art keywords
sheet layer
folded
elastic film
width direction
laminated portion
Prior art date
Application number
PCT/JP2016/060424
Other languages
English (en)
Japanese (ja)
Inventor
陽星 水元
竹内　寅成
Original Assignee
大王製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015068069A external-priority patent/JP6276215B2/ja
Priority claimed from JP2015195465A external-priority patent/JP6447924B2/ja
Priority claimed from JP2015225982A external-priority patent/JP5956667B1/ja
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2016159095A1 publication Critical patent/WO2016159095A1/fr

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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
    • B29C66/344—Stretching or tensioning the joint area during joining
    • 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
    • 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
    • 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
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • 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
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • 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
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • 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
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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 pants-type disposable diaper includes an exterior body that individually or integrally configures the front body and the back body, and an interior body including an absorbent body that is attached to the inner surface of the exterior body so as to extend from the front body to the back body.
  • a waist opening and a pair of left and right leg openings are formed by joining the side edges of the outer body of the front body and the side edges of the outer body of the rear body to form a side seal part. Is.
  • the outer body of the pants-type disposable diaper is provided with elastic members such as rubber thread in the waist area that is defined as the front-rear direction range (the front-rear direction range from the waist opening to the upper end of the leg opening) with side seals.
  • elastic members such as rubber thread
  • As an elastic member for that purpose a number of conventional elastic members such as rubber thread are elongated in the longitudinal direction.
  • the method of fixing in a line is widely adopted, as an excellent surface fitting property, a method of attaching an elastic film in a stretched direction in a stretchable direction has also been proposed. (For example, refer to Patent Document 3).
  • An elastic structure in which this elastic film is sandwiched between sheet layers (hereinafter also referred to as an elastic film elastic structure) is formed by laminating an elastic film between a first sheet layer whose elastic region is made of a nonwoven fabric and a second sheet layer made of a nonwoven fabric.
  • the first sheet layer and the second sheet layer are arranged at intervals in the stretch direction and the direction orthogonal thereto, with the elastic film being stretched in the stretch direction along the surface thereof. It is joined at a number of joints.
  • an elastic film stretchable structure in the natural length state, as the elastic film contracts between the joints, the interval between the joints becomes narrower, and the stretches between the joints in the first sheet layer and the second sheet layer.
  • a contraction fold is formed that extends in a direction that intersects the direction.
  • the elastic film is stretched between the joints when stretched, the spacing between the joints and the shrinkage wrinkles in the first sheet layer and the second sheet layer are widened, and the first sheet layer and the second sheet layer are completely developed. Elastic extension to the state becomes possible.
  • This elastic film stretchable structure is excellent in surface fit, and there is no bonding between the first sheet layer and the second sheet layer and the elastic film, and the first sheet layer and the second sheet layer are extremely bonded. Since there are few, it is very flexible, and there exists an advantage that the through-hole of an elastic film contributes also to air permeability improvement.
  • the elastic film stretchable structure usually cannot change the tightening force in the direction orthogonal to the stretchable direction.
  • the elastic film stretchable structure is unsuitable for exerting a strong tightening force because the elastic film becomes weak when the elastic film is thinned to ensure flexibility.
  • the main subject of this invention is providing the underpants type disposable diaper which can clamp
  • This invention which solved the above-mentioned subject has a ventral side exterior part and a back side exterior part, and a side edge part of the abdominal side exterior part and a side edge part of the back side exterior part are joined on both sides in the width direction.
  • At least part of the edge of the leg opening is formed by the edge of the portion located on both sides in the width direction of the interior body in the exterior body, At least one exterior part of the ventral exterior part and the back exterior part is A basic laminated portion in which an elastic film stretchable in the width direction is laminated between the first sheet layer and the second sheet layer from an edge portion of at least one of the waist opening and the leg opening to a subsequent portion; A folded laminate in which an elastic film continuous from the basic laminated portion and at least one sheet layer of the first sheet layer and the second sheet layer are folded at the edge of the opening, provided at the edge portion of the opening.
  • the elastic film is joined at a plurality of joining portions in which the first sheet layer and the second sheet layer are arranged at intervals in the width direction and the front-rear direction, respectively. It is formed to be stretchable in the width direction by stretching the film,
  • the present invention relates to a pants-type disposable diaper characterized by that.
  • the elastic film has two layers at the edge portion of at least one of the waist opening and the leg opening, and the subsequent film becomes a single layer.
  • the edge portion of the opening can be tightened more strongly while the portion is a stretchable structure made of the same elastic film. Therefore, a favorable fit for a pants-type disposable diaper can be created with only an elastic film.
  • the stretch stress of the folded laminated portion is substantially doubled and increased with respect to the stretch stress in the non-double region. Therefore, when the waist is folded and laminated, the circumference of the waist can be firmly tightened. On the other hand, in a non-double region, it can be tightened without excessive pressure by a small stretching stress.
  • the edge of the opening is formed by folding the sheet layer, there is an advantage that the first sheet layer and the second sheet layer are not opened and the appearance and wearing feeling are not deteriorated.
  • the exterior body is formed by joining both sides of the abdominal exterior body constituting the abdominal exterior part and both sides of the back side exterior body constituting the back side exterior part. It can be set as the aspect with which the back
  • Such an exterior two-part type is preferable because a folded laminated portion is easily formed on the exterior portion.
  • the first sheet layer and the second sheet layer may be folded together with the elastic film.
  • the sheet layer that is the outer side in the folded state is the inner side that is not folded together with the elastic film. It can also be set as the aspect currently folded on the sheet
  • the folded laminated portion may be folded on the back side opposite to the skin contact surface side.
  • the folding side of the folded layered portion can be determined as appropriate, but when folded back to the outside of the basic layered portion, the inner surface of the strongly tightened portion will not be uneven, so that the feeling of wearing will be good.
  • the folded laminated portion is folded to the skin contact surface side, and the liquid-impervious cover sheet is provided over the interior body and the folded laminated portion. Can do.
  • the body fluid can be prevented from flowing out by the liquid-impermeable cover sheet.
  • the joint area ratio occupied by the total area of the joints included in the unit area may be different between the folded laminated portion and the basic laminated portion, so that the stretching stress is different. it can.
  • the joint area ratio of the folded laminated portion is larger than the joint area ratio of the basic laminated portion, and the stretching stress of the folded laminated portion may be larger than the stretching stress of the basic laminated portion.
  • Adopting such a mode is, for example, a double structure around the waist under conditions where the stretch stress around the waist needs to be larger than the stretch stress around the waist with respect to the stretch stress around the waist.
  • This is effective when it is not necessary to double the stretching stress around the waist. That is, for the joint area ratio occupied by the total area of the joints included in a unit area, the joint area ratio of the folded laminated portion is made larger than the joint area ratio of the basic laminated portion. By making it larger than the joint area ratio, the stretching stress is reduced. However, even if the stretching stress is small, the folded laminated portion has a double structure. As a result, the stretching stress of the double structure can be made larger than the stretching stress of the basic laminated portion.
  • the area ratio of the joint portion in the folded laminated portion can be configured to increase stepwise or continuously from the middle in the width direction toward both sides in the width direction.
  • the “elastic limit elongation” means the elongation at the elastic limit (in other words, the state where the first sheet layer and the second sheet layer are completely expanded), and the length at the elastic limit is the natural length of 100.
  • % Represents the percentage of the target portion in the unit area, and the total area of the target portion (for example, the joint) in the target region (for example, the stretchable region) It is expressed as a percentage divided by the area of the target region.
  • area ratio of the joint portion means an area ratio in a state of being extended to the elastic limit in the expansion / contraction direction.
  • the arrangement pattern of the joint is not limited.
  • One example is a staggered arrangement that exhibits a good appearance.
  • the edge portion of the opening and the subsequent portion are stretchable structures made of the same elastic film, but the pants-type disposable diaper can tighten the edge portion of the opening more strongly, etc. Benefits are provided.
  • FIG. 1 is a plan view of the main part of the exterior body
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 1 It is a top view which shows only the principal part of the underpants type disposable diaper of a full expansion
  • (b) EE sectional view of FIG. It is a top view (outer surface side) of the underpants type disposable diaper of a full deployment state. It is a principal part enlarged plan view which shows the pattern of a junction part. It is a principal part enlarged plan view which shows the pattern of a junction part. It is a photograph of the sample of an exterior body.
  • FIG. 19 It is a top view which shows the various arrangement
  • the welding means which joins by welding of an object member can also be used.
  • Hot melt adhesive is applied in a pattern such as solid, bead, curtain, summit or spiral, and the fixed part of the elastic elastic member is used instead of or together with the outer peripheral surface of the elastic elastic member such as comb gun or sure wrap application. Application to can also be employed.
  • FIG. 1 to 7 show a first example of a pants-type disposable diaper.
  • this pants-type disposable diaper hereinafter, also simply referred to as a diaper
  • side edges on both sides in the width direction of the abdominal exterior body 26 and side edges on both sides in the width direction of the back side exterior body 27 are along the vertical direction.
  • the cylindrical outer bodies 26 and 27 are formed by heat sealing, ultrasonic welding, and the like, and the front end portion of the inner body 200 is formed on the inner surface in the center in the width direction of the ventral side outer body 26 of the outer bodies 26 and 27.
  • the rear end portion of the interior body 200 is connected to the inner surface of the central portion in the width direction of the backside exterior body 27 by a hot melt adhesive or the like.
  • Reference numeral 12 ⁇ / b> A denotes a joint portion (side seal portion) between the ventral-side exterior body 26 and the back-side exterior body 27.
  • the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like.
  • the excretory fluid that has permeated through the top sheet 11 is absorbed and retained.
  • the planar shape of the interior body 10 is not particularly limited, it is generally a substantially rectangular shape as illustrated.
  • a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used as the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13.
  • the material fibers constituting the nonwoven fabric can be made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, natural fibers such as cotton, and the spunlace method.
  • a nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.
  • liquid permeable surface sheet 11 When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent.
  • the liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.
  • liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13 a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used.
  • This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.
  • Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. Can be used.
  • the absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.
  • the shape of the absorbent body 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides at the crotch portion, but may be any suitable shape such as a rectangular shape.
  • the size of the constricted portion 13N can be determined as appropriate, but the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about 60%.
  • the constricted portion 13N if the planar shape of the interior body 10 is substantially rectangular, the remainder of the interior body 10 that does not include the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13. A part is formed.
  • the three-dimensional gather BS that fits around the legs is formed on both sides of the interior body 10.
  • the three-dimensional gather BS includes a fixed portion fixed to a side portion on the back surface of the interior body, and a side portion on the surface of the interior body from the fixed portion to the side of the interior body.
  • the gather body part extending to the front, the front and rear ends of the gather body part in a lying state are fixed to the side of the surface of the interior body, and the inside of the gathering part is not fixed.
  • the free part formed in this way is formed of a gathered nonwoven fabric 15 that is turned into a double sheet by folding.
  • an elongated gather elastic member 16 is disposed at the free end of the free portion.
  • the gather elastic member 16 is for forming a three-dimensional gather BS by raising a free part by elastic stretching force as shown by a two-dot chain line in FIG. 5 in the product state.
  • the liquid-impermeable back sheet 12 is folded back on the both sides in the width direction of the absorber 13 together with the liquid-permeable surface sheet 11.
  • the liquid-impermeable back side sheet 12 it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear.
  • a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.
  • the gather elastic member 16 materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester and the like that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less.
  • the gathered elastic member 16 may be a tape-like member having a certain width in addition to the thread-like shape shown in the figure.
  • the material fiber constituting the gathered nonwoven fabric 15 is made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or amide, recycled fibers such as rayon or cupra, and cotton.
  • Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability.
  • the gathered nonwoven fabric 15 in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.
  • the upper openings of the exterior bodies 26 and 27 become waist openings through which the wearer's torso passes, and the portions surrounded by the lower edges of the exterior bodies 26 and 27 and the side edges of the interior body 200 on both sides in the width direction of the interior body 200 are legs. It becomes a leg opening to let through.
  • the intermediate shape in the front-rear direction is constricted as shown in FIGS.
  • the exterior bodies 26 and 27 are parts that support the interior body 200 with respect to the wearer.
  • the exterior bodies 26 and 27 are composed of an abdominal exterior body 26 and a back exterior body 27, and the abdominal exterior body 26 and the back exterior body 27 are not continuous on the leg side and are separated in the front-rear direction.
  • the distance L in the front-rear direction is not particularly limited, but can be about 10 to 60% of the total length Y of the diaper.
  • on the back surface of the liquid-impermeable back sheet 12 in the interior body 10 a portion exposed to cover the entire back surface of the interior body 10 or between the abdominal exterior body 26 and the back exterior body 27.
  • the crotch outer body 22 may be omitted.
  • the same material as the first sheet layer 20A and the second sheet layer 20B described later can be used.
  • an elongated elastic member 24 along the width direction is disposed on the waist portion 23 which is an edge portion of the waist opening
  • An elastic film 30 is disposed in a region on the center side in the front-rear direction from the waist portion 23, and is provided with stretchability in the width direction.
  • the waist opening side is closer to the waist part than the boundary on the waist opening side. 23, and when there is no such boundary, the waist opening side becomes the waist portion 23 from the absorbent body 56 or the interior body 10.
  • the waist part elastic member 24 will be arranged between the 1st sheet layer 20A in the waist part 23 of the exterior bodies 26 and 27, and the 2nd sheet layer 20B at intervals in the front-back direction. It is an elongated elastic member such as a rubber thread, and gives an expansion / contraction force so as to tighten around the body torso.
  • the waist elastic members 24 are not arranged substantially as a single bundle with a close spacing, but with a spacing of about 3 to 8 mm so as to form a predetermined stretch zone, preferably three or more, preferably Five or more are arranged.
  • the elongation rate at the time of fixing the waist elastic member 24 can be determined as appropriate, but can be about 230 to 320% for a normal adult.
  • the rubber elastic member 24 is made of rubber thread. However, for example, a tape-like elastic member may be used. Alternatively, an elastic film described later may be extended to the waist 23. .
  • the waist elastic member 24 in the illustrated form is sandwiched between folded portions 20C formed by folding the constituent material of the second sheet layer 20B to the inner surface side at the waist opening edge. You may pinch
  • the constituent material of the first sheet layer 20A and the second sheet layer 20B can be used without particular limitation as long as it is a sheet, but it is preferable to use a nonwoven fabric from the viewpoint of air permeability and flexibility.
  • the nonwoven fabric is not particularly limited as to what the raw fiber is.
  • synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated.
  • the nonwoven fabric may be manufactured by any processing.
  • the processing method examples include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method.
  • the basis weight is preferably about 12 to 20 g / m 2 .
  • the first sheet layer 20A and the second sheet layer 20B may be a pair of layers in which a single material is folded and faced.
  • the stretchable region 20 ⁇ / b> X on the center side in the front-rear direction from the waist 23 is provided with stretchability in the width direction by providing the elastic film 30. That is, the stretchable region 20X is formed by laminating the elastic film 30 between the first sheet layer 20A and the second sheet layer 20B located outside the leg opening 29 from the boundary with the waist 23.
  • the elastic layer 30 and the first sheet layer 20A and the second sheet layer 20B, which are continuous from the basic laminated portion, are provided on the basic laminated portion 35 and the leg peripheral portion 28 that is the edge portion of the leg opening. And a folded laminated portion 36 that is folded outward. Then, as shown in FIGS.
  • the basic laminated portion 35 and the folded laminated portion 36 have the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 with the elastic film 30 extended at least in the width direction.
  • the sheet layer 20 ⁇ / b> B is bonded through the through holes 31 formed in the elastic film 30 at a large number of bonding portions 40 arranged at intervals in the width direction and the front-rear direction.
  • the first sheet layer 20A and the second sheet layer 20B are not joined to the elastic film 30 except at least between the first sheet layer 20A and the second sheet layer 20B in the joining portion 40.
  • the elastic film 30 is formed in two layers in the leg surrounding portion 28, and a single layer is formed in a portion between the leg surrounding portion 28 and the waist portion 23 that follows, so While the surrounding portion 28 and the subsequent portion are stretchable structures by the same elastic film 30, the leg surrounding portion 28 can be tightened more strongly. Therefore, it is possible to create a suitable fit for the pants-type disposable diaper with only the elastic film 30.
  • the edge 29 of the leg opening is formed by folding the first sheet layer 20A and the second sheet layer 20B, there is a situation where the first sheet layer 20A and the second sheet layer 20B are opened to deteriorate the appearance and wearing feeling. Less likely to occur.
  • the elastic film 30 is not particularly limited and can be used without particular limitation as long as it has elasticity per se, for example, a styrene elastomer, an olefin elastomer, a polyester elastomer, a polyamide elastomer, and a polyurethane elastomer. It is possible to use one or two or more blends of thermoplastic elastomers such as those processed into a film by extrusion molding such as a T-die method or an inflation method. Moreover, as the elastic film 30, the thing in which many holes and slits were formed for ventilation other than a non-porous thing can also be used.
  • the tensile strength in the stretching direction is 8 to 25 N / 35 mm
  • the tensile strength in the direction perpendicular to the stretching direction is 5 to 20 N / 35 mm
  • the tensile elongation in the stretching direction is 450 to 1050%
  • the direction perpendicular to the stretching direction is preferable.
  • the tensile strength and tensile elongation were determined according to JIS K7127 except that a tensile tester (for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU) was used and the test piece was a rectangular shape having a width of 35 mm and a length of 80 mm.
  • a tensile tester for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU
  • the thickness of the elastic film 30 is not particularly limited, but is preferably about 20 to 40 ⁇ m.
  • the basis weight of the elastic film 30 is not particularly limited, but is preferably about 30 to 45 g / m 2 , particularly preferably about 30 to 35 g / m 2 .
  • the width of the leg peripheral portion 28 (edge portion of the leg opening) where the folded laminated portion 36 is formed can be determined as appropriate (in the illustrated form, the longitudinal dimension), but in the normal case, about 10 to 60% of the total length Y of the diaper. It can be.
  • the folded side of the folded laminated portion 36 can be folded inside the basic laminated portion 35
  • the first sheet layer 20 ⁇ / b> A located inside the elastic film 30 in the basic laminated portion 35 is basically the elastic film 30 as shown in the figure.
  • the inner surface of the leg periphery portion 28, which is a portion that is relatively strongly tightened, does not have irregularities, so that the wearing feeling is good.
  • both the first sheet layer 20A and the second sheet layer 20B continuous from the basic laminated portion 35 can be folded together with the elastic film 30, as shown in FIG.
  • first sheet layer 20A in the illustrated embodiment only one of the first sheet layer 20A and the second sheet layer 20B (first sheet layer 20A in the illustrated embodiment) is folded together with the elastic film 30, and the other sheet layer (second sheet in the illustrated embodiment is second). If the leading end of the sheet layer 20B) is positioned between the leading end of one sheet layer (20A) and the folding fold, the thickness of the folded laminated portion 36 can be reduced without exposing the elastic film 30. preferable.
  • the elastic film 30 stretchable structure as in the present invention, basically, as the area ratio of the joint portion 40 increases, the portion where the first sheet layer 20A and the second sheet layer 20B contract by the elastic film 30 decreases. Elastic limit elongation also decreases. Therefore, as shown by the density difference of the dot pattern in FIG. 11, the area ratio of the joint portion 40 in the folded laminated portion 36 increases stepwise (or may be continuous) from the middle in the width direction to both sides in the width direction. If comprised in this way, the fit property of the leg periphery can be improved.
  • the area ratio of the joint portion 40 can be determined as appropriate, but in the normal case, it is desirable to be within a range of 1.8 to 25% (particularly 1.8 to 19%) in the stretchable region 20X.
  • the elastic limit elongation can be determined as appropriate, but in the normal case, it is preferably about 130 to 300% (particularly 200 to 295%) in the stretchable region 20X.
  • the area ratio of the joint 40 is changed in two steps, sufficient fit can be improved, but it can also be three or more, and if it is an elastic film 30 stretchable structure like this embodiment Since the area ratio, that is, the amount of shrinkage (elastic limit elongation) can be changed only by the pattern of the joint portion 40, it can be changed substantially continuously.
  • FIG. 12A shows an example of a pattern in which the area ratio of the joint portion 40 is changed in three stages.
  • FIG. 13B shows a pattern example in which the area ratio of the joint section 40 is changed in two stages. An example pattern is shown.
  • the shapes of the individual joints 40 and the through holes 31 in the natural length state are arbitrary shapes such as polygons (including linear and rounded ones) such as true circles, ellipses, and rectangles, stars, and clouds. It can be.
  • each joint 40 may be determined as appropriate, but if it is too large, the effect of the hardness of the joint 40 on the feel will increase, and if it is too small, the joint area will be small and the materials will not be sufficiently bonded together. Therefore, in general, the area of each joint 40 is preferably about 0.14 to 3.5 mm 2 (particularly 0.25 to 1.0 mm 2 ). The area of the opening of each through hole 31 may be equal to or larger than the joint because the joint is formed through the through hole 31, but may be about 1 to 1.5 times the area of the joint 40. preferable.
  • the area of the opening of the through hole 31 means a value when the stretchable region 20X is in a natural length state, and the area of the opening of the through hole 31 is different between the front and the back of the elastic film 30, and is uniform in the thickness direction. If not, it means the minimum value.
  • the plane arrangement of the joints 40 and the through holes 31 can be determined as appropriate, but a plane arrangement that is regularly repeated is preferable, such as an oblique lattice shape as shown in FIG. 15 (a), or as shown in FIG. 15 (b). Hexagonal lattice shape (these are also called staggered shapes), a square lattice shape as shown in FIG. 15 (c), a rectangular lattice shape as shown in FIG. 15 (d), and a parallel shape as shown in FIG. 15 (e). Body lattice (in the form shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other), etc.
  • the group of joints 40 (in which these are inclined at an angle of less than 90 degrees with respect to the expansion / contraction direction)
  • group of joints 40 (group unit arrangement may be regular or irregular, and may be a pattern, a character shape, etc.) shall be regularly repeated. You can also.
  • the arrangement form of the joint portions 40 and the through holes 31 may be the same or different in a plurality of regions having different area ratios.
  • the joining means of the first sheet layer 20A and the second sheet layer 20B in the joining part 40 is not particularly limited.
  • the joining of the first sheet layer 20A and the second sheet layer 20B in the joining portion 40 may be performed by a hot melt adhesive, or may be performed by a joining means such as heat sealing or ultrasonic sealing.
  • the joining means by material welding as described in Patent Document 1, the through hole of the elastic film is formed by extrusion, and the first sheet layer 20A and the second sheet layer 20B are directly welded at the position of the through hole. Although it can be joined, the peel strength is low, and there is a risk of peeling when a strong force is applied.
  • the joining of the first sheet layer 20A and the second sheet layer 20B in the joining portion 40 is at least as follows.
  • formed by 30 m of the melt-solidified material of the elastic film 30 over the 1st sheet layer 20A and the 2nd sheet layer 20B is preferable.
  • the peel strength becomes high, so that both high air permeability and high peel strength can be achieved.
  • such a joining structure is obtained by extending the elastic film 30 between the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 ⁇ / b> B in the expansion / contraction direction with a substantially uniform elongation rate in the direction orthogonal to the expansion / contraction direction. While being stretched and sandwiched to form the basic laminated portion 35 and the folded laminated portion 36, the elastic film 30 is melted at a plurality of locations to form the through holes 31 by welding in a predetermined pattern of the joint portion 40.
  • the first sheet layer 20A and the second sheet layer 20B can be simply and efficiently manufactured by using a method in which the melt of the elastic film 30 is solidified at the position of the through-hole 31.
  • FIG. 18 shows an example using a heat seal device, which is opposed to a seal roll 60 having a large number of pressurizing convex portions 60p arranged in the pattern of the joint portion 40 on the outer peripheral surface.
  • the elastic film 30 is melted to form the through-hole 31 only at the portion pressed in the thickness direction between the pressure convex portion 60p and the outer peripheral surface of the anvil roll 61, and at least the elastic film is located at the position of the through-hole 31. While the first sheet layer 20A and the second sheet layer 20B are joined by solidifying the melt of 30, the elastic film 30 is melted in a desired pattern to form the through holes 31. As long as the first sheet layer 20A and the second sheet layer 20B can be joined by solidifying the melt of the elastic film 30 at the position of the through hole 31, other devices such as an ultrasonic seal can be used. .
  • the relationship between the melting point of the elastic film 30, the melting points of the first sheet layer 20A and the second sheet layer 20B, and the level of the processing temperature at the welding position can be determined as appropriate, but the first sheet layer 20A and the second sheet layer 20B
  • the melting point is set to be equal to or lower than the melting point of the elastic film 30, and the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 ⁇ / b> B and the entire elastic film 30 are melted and mixed at the welding position, and the joining portion 40 is formed.
  • the melting points of the first sheet layer 20A and the second sheet layer 20B are higher than the melting point of the elastic film 30, and the elastic film 30 is melted at the welding location, and part or all of the first sheet layer 20A and the second sheet layer 20B are It is preferable not to melt. That is, in the latter case, as can be seen from FIGS.
  • the fibers 20 f of the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 ⁇ / b> B continuous from the periphery of the joint 40 remain, and the first sheet layer 20 ⁇ / b> A and
  • the first sheet layer 20A and the second sheet layer 20B are joined by the melt-solidified material 30m of the elastic film 30 that has permeated and solidified over the second sheet layer 20B, and is elastic to the first sheet layer 20A and the second sheet layer 20B. Not only the biting of the melt-solidified material 30m of the film 30 becomes good, but the strength of the first sheet layer 20A and the second sheet layer 20B is not easily lowered, so that the peel strength is further improved.
  • the core including not only the core in the composite fiber but also the central part of the single component fiber
  • the surrounding part melts, and some of the fibers do not melt at all, but the remaining fibers all melt or the core remains
  • the surrounding part includes a molten form.
  • the elastic film 30 preferably has a melting point of about 80 to 145 ° C., and the first sheet layer 20A and the second sheet layer 20B have melting points of about 85 to 190 ° C., particularly about 150 to 190 ° C.
  • the difference between the melting point of the first sheet layer 20A and the second sheet layer 20B and the melting point of the elastic film 30 is preferably about 60 to 80 ° C.
  • the region overlapping with the absorber 13 in the pants-type disposable diaper is a region where it is desirable to dispose the elastic film 30 for manufacturing reasons but does not need to be expanded or contracted. Therefore, the area ratio of the joint portion in the portion overlapping the absorber 13 in the stretchable region 20X of the exterior bodies 26 and 27 is increased, and the non-stretchable region is set to a non-stretchable region having an elastic limit elongation of 130% or less or is not provided with an elastic member. Or an area.
  • the front and rear ends of the interior body 10 mounted on the inner surfaces of the exterior bodies 26 and 27 are covered to prevent leakage from the front and rear edges of the interior body 10.
  • the pressing sheets 50 and 60 may be provided.
  • the front presser sheet 50 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end of the front body F to the position overlapping the front end of the interior body 10.
  • the rear pressing sheet 60 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end portion to the position overlapping the rear end portion of the interior body 10 in the inner surface of the back body B.
  • the folded portions 20C formed by folding the exterior bodies 26 and 27 to the inner surface of the diaper can be extended to the portion overlapping the interior body 10 to form portions equivalent to the press sheets 50 and 60 described above.
  • the above example is an example of an exterior two-part structure in which the abdominal exterior body 26 and the back exterior body 27 are separated, but with respect to the exterior body that continues from the abdomen to the back via the crotch It can also be applied. Since the ventral region and the dorsal region in the continuous exterior body correspond to the abdominal exterior body 26F and the backside exterior body 27 described above, in the present invention, both are collectively referred to as the abdominal exterior portion and the backside exterior. It is a part.
  • the folded laminated portion 36 is provided on both the abdominal exterior body 26 and the back exterior body 27, but the folded laminated portion 36 can be formed only on one of them.
  • the folded laminated portion 36 is provided only at the leg surrounding portion 28 (the edge portion of the leg opening), but together with (or instead of) this, as shown in FIGS. 19 and 20
  • the basic laminated portion 35 may be extended to the waist portion 23, and the folded laminated portion 36 may be provided on the waist portion 23 (the edge portion of the waist opening).
  • a stretchable sheet for forming a basic laminate portion and a folded laminate portion, in which an elastic film stretchable in the width direction is laminated between the first sheet layer and the second sheet layer, and a manufacturing method thereof are supplementary. It will be explained in the following.
  • the elastic sheet is formed by laminating an elastic film 30 that is stretchable in the width direction between a first sheet layer 20A made of, for example, a non-woven fabric that does not have stretchability, and a second sheet layer 20B made of, for example, a non-woven fabric that does not have stretchability.
  • first sheet layer 20A and the second sheet layer 20B are joined by a large number of joints 40 that are spaced apart, for example, by welding, directly or via the elastic film 30.
  • “the first sheet layer 20A and the second sheet layer 20B are not stretchable” does not mean that the first sheet layer 20A and the second sheet layer 20B are not stretched at all. It means not.
  • the first sheet layer 20A, the elastic film 30 and the second sheet are disposed between the anvil roll 60 having the projections 60a formed in a predetermined pattern on the outer surface and the ultrasonic horn 61.
  • the layer 20B is supplied, and ultrasonic melting energy is applied by the ultrasonic horn 61.
  • the elastic film 30 is mainly melted to join the first sheet layer 20A and the second sheet layer 20B.
  • Opposite roll 63 is arranged to face the anvil roll 60.
  • a driving roll 65 is provided with respect to the facing roll 63 and serves as a nip roll that sandwiches the elastic film 30. In the structure of such an apparatus, after the elastic film 30 is circulated around the opposing roll 63, the nip position with the drive roll 65 is reached, and thereafter the anvil roll 60 is circulated.
  • the elastic film 30 is stretched and the anvil roll 60 Joining is performed by the group of protrusions 60 a and the ultrasonic horn 61.
  • the elongation rate in the manufacturing process of the elastic film 30 (based on the length of the natural state as 100%) Can be set.
  • FIG. 21 schematically shows a cross-section in the stretched state of the sheet before joining
  • FIG. 22 shows the stretchable sheet after joining.
  • the stretchable sheet contracts due to the contraction force of the elastic film 30 and can be expanded by applying an external force in the width direction (left-right direction in FIG. 23). Therefore, this elastic sheet is applied in the waist circumference direction of the disposable diaper to contract the waist or the waist.
  • an elastic sheet can be manufactured with a predetermined area, when it is desired to apply a contracting force to the entire desired area, the elastic sheet may be applied.
  • it is common to fix a plurality of thread rubbers in parallel on a sheet, but this is due to deterioration of hot rubber adhesive for fixing to thread rubbers and sheets. It is inferior in terms of quality deterioration and stable productivity during production.
  • the first sheet layer 20A and the second sheet layer 20B are joined by melting the elastic film 30.
  • the bonding mode between the layers is not limited to these examples.
  • the first sheet layer 20A and the second sheet layer 20B are joined directly, that is, without interposing an elastic film.
  • the above aspects (1) to (3) are cases where the melting point of the elastic film 30 is lower than the melting points of the first sheet layer 20A and the second sheet layer 20B, but the melting point of the elastic film 30 is the first sheet layer. It may be higher than the melting point of 20A and / or the second sheet layer 20B. In this case, the elastic film 30 side surface portion of the first sheet layer 20A and / or the second sheet layer 20B is activated or melted and joined to the elastic film 30.
  • the elastic film 30 may be partly melted, and the first sheet layer 20A and / or the second sheet layer 20B may be joined by melting.
  • the first sheet layer 20A and / or the second sheet layer 20B may be a nonwoven fabric, and the fibers thereof may have a core / sheath structure. In this case, for example, only the sheath component of the fiber can be melted and contribute to the joining.
  • Through-holes 31 can be formed around the periphery.
  • the first sheet layer 20A and the second sheet layer 20B are formed of, for example, a nonwoven fabric, the nonwoven fabric exhibits air permeability. Therefore, the formation of the through-hole 31 shows air permeability on the front and back of the stretchable sheet, and the air permeability is good. It becomes a turning sheet.
  • the reason why the air-permeable through-hole 31 is formed is not necessarily clear, but the elastic film 30 is melted by the ultrasonic melting energy, and the coupling portion 40 is a thin layer due to the pressing by the protrusion 60 a of the anvil roll 60. Turn into. At this time, the elastic film 30 is also thinned, the peripheral portion of the joint portion 40 reaches the breaking strength, the breakage is started by the stretching stress acting on the stretched elastic film 3, shrinks to the balance point, and opens. it is conceivable that.
  • FIG. 26 schematically shows an example of forming the through hole 31 in the case of a circular through hole.
  • the crescent-shaped through holes 31 are formed on both sides of the connecting portion 40 in the machine direction (extension direction).
  • the connecting part can be formed in a long shape in a direction (cross direction: CD direction) orthogonal to the machine direction (extension direction).
  • cross direction CD direction
  • extension direction the machine direction
  • the through holes 31 are formed in all the coupling portions. If it is required to reliably form the through hole 31 or make a large opening, the method shown in FIG. 28 can be adopted. That is, as shown in FIG. 28 (b), the stretchable sheet in which the coupling portion 40 is formed is passed between a pair of rolls 64 having ridges or protrusions 64a, and between adjacent protrusions 64a and 64a of one roll 64.
  • the through-hole 31 can be formed by biting the protrusion 64a of the other roll 64 and applying a deformation force to the stretchable sheet.
  • the exterior body 20 has a planar shape of the exterior body 20 in which the elastic film 30 is disposed between the first sheet layer 20A and the second sheet layer 20B in order to form leg openings on both sides of the middle.
  • the concave leg circumference line 29 forms a pseudo hourglass shape as a whole.
  • the waist region T defined as the longitudinal range of the side seal portion 26 where the front body F and the back body B are joined.
  • the stretch stress in the waist region 23 is formed larger than the stretch stress in the waist region TX.
  • the waist area 23 includes a folded portion 20C corresponding to a folded laminated portion 36 in which the extending portion of the exterior body 20 having the elastic film described above is folded to the inner surface side.
  • stretchable regions 20 ⁇ / b> X made of a stretchable sheet are formed in the waistline region T of the front body F, the waistline region T of the back body B, and the intermediate region L between them in the exterior body 20.
  • the waistline region T, the waistline region T of the back body Ba, and a part of the intermediate region L therebetween constitute a “stretchable region”.
  • the middle portion of the intermediate region L is a non-stretchable region because the elastic film 30 does not exist.
  • an intermediate portion in the width direction including a portion overlapping with the absorber 13 (a part or all of the overlapping portion may be sufficient, and it is desirable to include substantially the entire interior body fixing portion 10B).
  • a non-expandable region 70 is formed in the region, and portions up to the side seal portions 26 on both sides in the width direction are formed as an expandable region 80 that expands and contracts in the width direction.
  • the elastic film 30 is laminated between the first sheet layer 20A and the second sheet layer 20B throughout the stretchable region 80 and the non-stretchable region 70, and the elastic film 30 is stretched in the width direction.
  • first sheet layer 20A and the second sheet layer 20B are arranged with a large number of joining portions 40 arranged at intervals in the expansion / contraction direction (width direction) and the direction orthogonal thereto (front-rear direction), ( In the example shown in the figure, they are joined through a through-hole 31 formed in the elastic film 30.
  • the area ratio of the joint portion 40 is higher than that of the stretchable region 80, so that the elastic limit elongation in the stretch direction is 130% or less (preferably 120% or less, more preferably
  • the elastic limit elongation in the stretchable direction is 200% or more (preferably 265 to 295%). be able to.
  • the end portion of the stretchable region 80 on the non-stretchable region 70 side is the area ratio of the joint portion 40 than the main stretchable region 81 excluding the end portion.
  • the buffer expansion / contraction region 82 is low.
  • Elongation rate means a value when the natural length is 100%.
  • Weight is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ⁇ 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%.
  • a sample with a size of 200 mm ⁇ 250 mm ( ⁇ 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm ⁇ 250 mm, ⁇ 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight. “Thickness” is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 10 gf / cm 2 and pressure area: 2 cm 2 . ⁇ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ⁇ 5 °C, relative humidity 65% or less). .
  • the present invention can be used for a pants-type disposable diaper as in the above example.
  • B Rear body, F ... Front body, L ... Middle region, T ... Trunk circumference region, 10 ... Interior body, 11 ... Liquid permeable top sheet, 12 ... Liquid impervious back side sheet, 13 ... Absorber, 13N DESCRIPTION OF SYMBOLS ... Constriction part, 14 ... Packaging sheet, 15 ... Gathered nonwoven fabric, 16 ... Gather elastic member, 20A ... 1st sheet layer, 20B ... 2nd sheet layer, 20X ... Expansion / contraction area, 21 ... Side seal part, 22 ... Crotch part exterior Body, 24 ... waist elastic member, 25 ... contraction fold, 26, 27 ... exterior body, 26 ... ventral side exterior body, 27 ... back side exterior body, 28 ... leg periphery, 29 ... edge of leg opening, 30 ... Elastic film, 31 ... through hole, 35 ... basic laminated portion, 36 ... folded laminated portion, 40 ... joined portion.

Landscapes

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

Abstract

La présente invention vise à permettre à une partie de bord d'une ouverture d'être fixée plus fermement. À cet effet, l'invention concerne une couche jetable de type sous-vêtements, dans laquelle des sections de bord latérales d'une partie extérieure ventrale et d'une partie extérieure dorsale d'un corps extérieur sont reliées sur les deux côtés dans une direction de largeur pour former une ouverture de taille, et des bords d'ouvertures de jambes sont formés au moins partiellement par des bords sur les deux côtés dans la direction de largeur d'un corps intérieur dans le corps extérieur, la partie extérieure ventrale et/ou la partie extérieure dorsale ayant, s'étendant sur une partie s'étendant vers cette dernière depuis une partie de bord de l'ouverture de taille et/ou les ouvertures de jambe, une partie superposée de base dans laquelle un film élastique est superposé entre une première couche de feuille et une seconde couche de feuille, et une partie superposée pliée dans laquelle le film élastique et la première couche de feuille et/ou la seconde couche de feuille sont repliés au niveau du bord de l'ouverture, la première couche de feuille et la seconde couche de feuille dans la partie superposée de base et la partie superposée pliée étant reliées par de nombreuses sections de liaison espacées dans la direction de largeur et une direction avant-arrière, et la partie superposée de base et la partie superposée pliée étant aptes à s'étendre et se contracter dans la direction de largeur par expansion et contraction du film élastique.
PCT/JP2016/060424 2015-03-30 2016-03-30 Couche jetable de type sous-vêtement WO2016159095A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2015068069A JP6276215B2 (ja) 2015-03-30 2015-03-30 パンツタイプ使い捨ておむつ
JP2015-068069 2015-03-30
JP2015195465A JP6447924B2 (ja) 2015-09-30 2015-09-30 使い捨ておむつ
JP2015-195465 2015-09-30
JP2015225982A JP5956667B1 (ja) 2015-11-18 2015-11-18 パンツタイプ使い捨ておむつ
JP2015-225982 2015-11-18

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019131109A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant type culotte
WO2019131110A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
WO2019131060A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant de type culotte
WO2019131111A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant de type culotte
JP2019205920A (ja) * 2019-09-11 2019-12-05 ユニ・チャーム株式会社 パンツ型吸収性物品
CN110831557A (zh) * 2017-09-27 2020-02-21 大王制纸株式会社 一次性穿着物品
CN113840586A (zh) * 2019-05-20 2021-12-24 尤妮佳股份有限公司 内裤型一次性尿布及制造内裤型一次性尿布的方法
RU2772176C2 (ru) * 2017-12-28 2022-05-18 Юничарм Корпорейшн Впитывающее изделие в виде трусов

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004532758A (ja) * 2001-06-21 2004-10-28 ザ プロクター アンド ギャンブル カンパニー 弾性のある積層ウェブ
JP2008260131A (ja) * 2007-04-10 2008-10-30 Zuiko Corp 積層伸縮シートの製造方法
US20140155857A1 (en) * 2011-06-15 2014-06-05 Kimberly-Clark Worldwide, Inc. Disposable Absorbent Garment Having Colored Facings and Integral Waistband
JP2014520589A (ja) * 2011-06-30 2014-08-25 エスセーアー・ハイジーン・プロダクツ・アーベー 弾性積層体を形成する方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004532758A (ja) * 2001-06-21 2004-10-28 ザ プロクター アンド ギャンブル カンパニー 弾性のある積層ウェブ
JP2008260131A (ja) * 2007-04-10 2008-10-30 Zuiko Corp 積層伸縮シートの製造方法
US20140155857A1 (en) * 2011-06-15 2014-06-05 Kimberly-Clark Worldwide, Inc. Disposable Absorbent Garment Having Colored Facings and Integral Waistband
JP2014520589A (ja) * 2011-06-30 2014-08-25 エスセーアー・ハイジーン・プロダクツ・アーベー 弾性積層体を形成する方法

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110831557A (zh) * 2017-09-27 2020-02-21 大王制纸株式会社 一次性穿着物品
CN110831557B (zh) * 2017-09-27 2021-09-28 大王制纸株式会社 一次性穿着物品
EP3643279A4 (fr) * 2017-09-27 2021-03-10 Daio Paper Corporation Article vestimentaire jetable
JP2019118581A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 パンツ型吸収性物品
EP3705097A4 (fr) * 2017-12-28 2020-12-09 Unicharm Corporation Article absorbant
JP2019118580A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 吸収性物品
WO2019131109A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant type culotte
JP2019118579A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 パンツ型吸収性物品
JP7107681B2 (ja) 2017-12-28 2022-07-27 ユニ・チャーム株式会社 パンツ型吸収性物品
CN110612084A (zh) * 2017-12-28 2019-12-24 尤妮佳股份有限公司 短裤型吸收性物品
WO2019131111A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant de type culotte
KR20200086741A (ko) * 2017-12-28 2020-07-17 유니 참 코포레이션 팬티형 흡수성 물품
CN111526845A (zh) * 2017-12-28 2020-08-11 尤妮佳股份有限公司 短裤型吸收性物品
CN111526841A (zh) * 2017-12-28 2020-08-11 尤妮佳股份有限公司 吸收性物品
JP2019118558A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 パンツ型吸収性物品
RU2739374C1 (ru) * 2017-12-28 2020-12-23 Юничарм Корпорейшн Впитывающее изделие в форме трусов
KR102194963B1 (ko) 2017-12-28 2020-12-24 유니 참 코포레이션 팬티형 흡수성 물품
WO2019131060A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant de type culotte
WO2019131110A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
CN111526841B (zh) * 2017-12-28 2022-07-05 尤妮佳股份有限公司 吸收性物品
RU2765363C2 (ru) * 2017-12-28 2022-01-28 Юничарм Корпорейшн Впитывающее изделие
JP7057130B2 (ja) 2017-12-28 2022-04-19 ユニ・チャーム株式会社 パンツ型吸収性物品
RU2772176C2 (ru) * 2017-12-28 2022-05-18 Юничарм Корпорейшн Впитывающее изделие в виде трусов
CN111526845B (zh) * 2017-12-28 2022-06-03 尤妮佳股份有限公司 短裤型吸收性物品
EP3949920A4 (fr) * 2019-05-20 2022-06-15 Unicharm Corporation Couche jetable de type culotte et procédé de fabrication de couche jetable de type culotte
CN113840586A (zh) * 2019-05-20 2021-12-24 尤妮佳股份有限公司 内裤型一次性尿布及制造内裤型一次性尿布的方法
JP2019205920A (ja) * 2019-09-11 2019-12-05 ユニ・チャーム株式会社 パンツ型吸収性物品

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