[go: up one dir, main page]

WO2016121977A1 - Pants-type disposable diaper - Google Patents

Pants-type disposable diaper Download PDF

Info

Publication number
WO2016121977A1
WO2016121977A1 PCT/JP2016/052807 JP2016052807W WO2016121977A1 WO 2016121977 A1 WO2016121977 A1 WO 2016121977A1 JP 2016052807 W JP2016052807 W JP 2016052807W WO 2016121977 A1 WO2016121977 A1 WO 2016121977A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
elastic film
sheet
sheet layer
stretchable
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2016/052807
Other languages
French (fr)
Japanese (ja)
Inventor
美奈 高石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daio Paper Corp
Original Assignee
Daio Paper Corp
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 JP2015017498A external-priority patent/JP5980355B2/en
Priority claimed from JP2015070294A external-priority patent/JP5918876B1/en
Priority claimed from JP2015195457A external-priority patent/JP5980399B1/en
Application filed by Daio Paper Corp filed Critical Daio Paper Corp
Publication of WO2016121977A1 publication Critical patent/WO2016121977A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—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 specially adapted to be worn around the waist, e.g. diapers, nappies 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
    • B29C66/8351—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 that has solved the first problem is as follows.
  • 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 fixed to the inner surface of the exterior body so as to extend from the front body to the back body,
  • a pants-type disposable diaper having a waist opening and a pair of left and right leg openings formed by joining side edges of the outer body of the front body and both side edges of the outer body of the rear body to form a side seal part
  • the area of at least the crotch part in the front-rear direction is an expansion / contraction area that can be expanded and contracted in the width direction
  • an elastic film is laminated between the first sheet layer and the second sheet layer, and the elastic film is stretched in the width direction
  • the first sheet layer and the second sheet layer Is an elastic film stretchable structure bonded directly or indirectly with a large number of sheet bonding portions arranged at intervals in the width direction and the
  • the stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
  • the absorbent body has a low basis weight part having a lower basis weight than the surroundings in a shape in which the width gradually or continuously widens from the waist opening side toward the crotch part side,
  • the pants-type disposable diaper according to any one of claims 1 to 7.
  • the non-absorbent body side portion of the interior body contracts to the center in the width direction due to the shrinkage of the stretchable region of the exterior body. Accordingly, the rising position of the three-dimensional gather moves to the center in the width direction and rises from a position closer to the side edge of the constricted portion of the absorber, i.e., a position suitable for the width of the wearer's crotch.
  • the fit to the root is improved and the leakage prevention property is high.
  • it does not have the elongate elastic expansion-contraction member extended along leg opening a structure is simple and a softness
  • the gather elastic member 96 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. As the gather elastic member 96, a tape-like member having a certain width can be used in addition to the thread-like shape shown in the figure.
  • 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 elastic limit elongation at each part can be determined as appropriate, but in the normal case, it is preferably 130 to 200% (especially 150 to 180%) in the fixing region 15 of the interior body, and 200% in the surrounding region 16. It is preferable to make the above (especially 265 to 295%).
  • planar arrangement of the sheet joint portion 40 and the through holes 31 can be determined as appropriate, a planar arrangement that is regularly repeated is preferable, and an oblique lattice shape as shown in FIG. Hexagonal lattice shape as shown (these are also called zigzag shapes), square lattice shape as shown in FIG. 15 (c), rectangular lattice shape as shown in FIG. 15 (d), as shown in FIG. 15 (e) Parallel body lattice (as shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other), etc.
  • such a joining structure has an elastic film 30 between the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 ⁇ / b> B with an approximately uniform elongation rate in a direction perpendicular to the expansion / contraction direction.
  • the elastic film 30 is melted at a number of locations to form the through-holes 31 by welding with a predetermined pattern of the sheet joint portion 40 while being stretched in the expansion / contraction direction.
  • the melt of the elastic film 30 is solidified and can be manufactured simply and efficiently using a method of joining the first sheet layer 20A and the second sheet layer 20B.
  • the shape / area of each sheet joint portion 40 and the shape / area of each through hole 31 are substantially equal in the natural length state.
  • the production line shown in FIG. 18 has a transverse flow configuration in which the diaper width direction is the MD direction (machine direction, line flow direction).
  • the inner body 10 is attached to the outer body 20, it is folded at the center in the front-rear direction to join both side portions of the front and rear outer bodies 20 and to be divided into individual diapers DP.
  • the same names and symbols as those of the members after manufacture are used for the members that are continuous in the manufacturing process.
  • the fibers 20f of the first sheet layer 20A and the second sheet layer 20B continuous from the periphery of the sheet bonding portion 40 remain, and the first sheet layer 20A.
  • 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 the first sheet layer 20A and the second sheet layer 20B are bonded to each other. Not only the biting of the melt-solidified material 30m of the elastic film 30 is 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 other regions are non-stretchable regions whose elastic limit elongation is 130% or less. Or may be a stretchable region by an elongated elastic member.
  • each sheet bonding portion 40 may be determined as appropriate. However, if the size is too large, the hardness of the sheet bonding portion 40 has an effect on the touch. If the size is too small, the bonding area is small and the materials are sufficiently bonded to each other. In general, the area of each sheet joint portion 40 is preferably about 0.14 to 3.5 mm 2 because it cannot be performed. The area of the opening of each through hole 31 may be equal to or larger than the sheet joint portion because the sheet joint portion is formed through the through hole 31, but is about 1 to 1.5 times the area of the sheet joint portion. It is preferable.
  • the first sheet layer 20A and the second sheet layer 20B are between the first sheet layer 20A and the second sheet layer 20B under the condition that the melting point of at least one of the first sheet layer 20A and the second sheet layer 20B is higher than the melting point of the elastic film 30. It can be manufactured by sandwiching the elastic film 30, pressurizing and heating a portion to be the sheet bonding portion 40, and melting at least one of the first sheet layer 20 ⁇ / b> A and the second sheet layer 20 ⁇ / b> B and the elastic film 30.
  • 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 .
  • a part or all of the first sheet layer 20A and the second sheet layer 20B may be a pair of layers in which one material is folded and faced. For example, as shown in the figure, in the waist end region 23, the constituent material located outside is the second sheet layer 20B, and the folded portion 20C that is folded back to the inner surface side at the waist opening edge is the first sheet layer 20A.
  • the stretchable region 80 and the non-stretchable region 70 can be formed by the presence or absence of a portion where the elastic film 30 does not continue linearly along the width direction.
  • the non-stretchable region 70 preferably has an elastic limit elongation in the width direction of 120% or less (preferably 110% or less, more preferably 100%).
  • “Elastic limit elongation” means the elongation of the elastic limit in the expansion / contraction direction (in other words, the state in which the first sheet layer and the second sheet layer are completely expanded), and the length at the elastic limit is the natural length. It is expressed as a percentage when 100% is assumed.
  • “Area ratio” means the ratio of the target portion to the unit area, and the sum of the target portions (for example, the opening of the sheet joint portion 40 and the through hole 31) in the target region (for example, the stretchable region 80 and the non-stretchable region 70).
  • “Thickness” other than the above 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 .
  • ⁇ "Tensile strength” and “Tensile elongation (breaking elongation)” conform to JIS K7127: 1999 "Plastics-Test method for tensile properties-” except that the test piece is rectangular with a width of 35 mm x length of 80 mm.
  • the initial chuck interval (distance between marked lines) is 50 mm, and the tensile speed is 300 mm / min.

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

[Problem] To provide a pants-type disposable diaper having a narrow crotch width and having an appearance more similar to underwear. [Solution] In order to resolve the problem, a region (15A) of at least a crotch section, in the front-back direction within a fixing region (15) of an interior body (10) in an exterior body (20), is formed as a stretchable region (80) that is stretchable in the width direction. The stretchable region (80) is formed as a stretchable elastic film structure (20X) in which a first sheet layer (20A) and a second sheet layer (20B) are bonded directly or indirectly with a plurality of sheet bonding sections (40) aligned, with gaps therebetween, in the width direction and in the front-back direction, in a state in which an elastic film (30) is laminated between the first sheet layer (20A) and the second sheet layer (20B) and the elastic film (30) is stretched in the width direction.

Description

パンツタイプ使い捨ておむつPants-type disposable diaper

　本発明は、下着らしい外観のパンツタイプ使い捨ておむつに関する。 The present invention relates to a pants-type disposable diaper that looks like underwear.

　パンツタイプ使い捨ておむつは、前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から後身頃にわたるように外装体の内面に取り付けられた、吸収体を含む内装体とを備え、前身頃の外装体の両側縁部と後身頃の外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成されているものが一般的である。 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. Generally, 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.

　外装体は、サイドシール部を有する前後方向範囲（ウエスト開口から脚開口の上端に至る前後方向範囲）として定まる胴周り領域と、脚開口を形成する部分の前後方向範囲として定まる中間領域とを有しており、中間領域は内装体の側方に位置するカバー領域を有しており、胴周り領域やカバー領域に糸ゴム、シート状等の弾性部材を設けることが一般的となっている（例えば、特許文献１参照）。 The exterior body has a waist region defined as a front-rear direction range (a front-rear direction range extending from the waist opening to the upper end of the leg opening) having a side seal portion, and an intermediate region defined as a front-rear direction range of a portion forming the leg opening. The intermediate region has a cover region located on the side of the interior body, and it is common to provide elastic members such as rubber thread and sheet in the waist region and the cover region ( For example, see Patent Document 1).

　特に、外装体における内装体の固定領域は、外装体に弾性部材を設けないか、又は製造を容易にするために、内装体の固定領域を含めて幅方向全体にわたり弾性部材を取り付けた後、伸縮性が不要な内装体の固定領域については、弾性部材を切断する等により弾性部材による収縮力が作用しない状態に加工する（以下、伸縮性を殺すともいう）ことが一般的である。 In particular, the fixing area of the interior body in the exterior body is not provided with an elastic member in the exterior body, or after attaching the elastic member over the entire width direction including the securing area of the interior body, In general, the fixing region of the interior body that does not require stretchability is processed so that the contraction force by the elastic member does not act by cutting the elastic member (hereinafter also referred to as killing stretchability).

　ところで、近年では、パンツタイプ使い捨ておむつに対する要求の一つとして、より下着らしい外観が望まれている。本発明者の知見によれば、パンツタイプ使い捨ておむつが下着らしい外観とならない一つの原因は、内装体の股間部の幅が広いことである。 By the way, in recent years, as one of the requirements for a pants-type disposable diaper, a more underwear-like appearance is desired. According to the knowledge of the present inventor, one reason that the pants-type disposable diaper does not look like underwear is that the width of the crotch portion of the interior body is wide.

　しかし、内装体の股間部の幅を狭くするには吸収体の幅を短くすることが簡単であるが、使い捨ておむつでは股間部に十分な大きさの吸収体を配置する必要があることや、製造上の制約もあり、吸収体の幅を短くすることにも限界がある。 However, to narrow the width of the crotch part of the interior body, it is easy to shorten the width of the absorbent body, but in a disposable diaper, it is necessary to arrange a sufficiently large absorbent body in the crotch part, There are also restrictions on manufacturing, and there is a limit to shortening the width of the absorber.

　他方、外装体に伸縮性を付加するための弾性部材としては、従来、糸ゴム等の細長状弾性伸縮部材を長手方向に伸長した状態で多数並べて固定する手法が広く採用されているが、面としてのフィット性に優れるものとして、弾性フィルムを伸縮性の付与方向に伸長した状態で取り付ける手法も提案されている。（例えば特許文献３参照）。 On the other hand, as an elastic member for adding stretchability to the exterior body, conventionally, a method in which a large number of elongated elastic stretch members such as rubber thread are aligned and fixed in the longitudinal direction is widely used. As a method having excellent fitting properties, 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).

　この弾性フィルムによる伸縮構造（以下、弾性フィルム伸縮構造ともいう）は、伸縮領域が不織布からなる第１シート層と、不織布からなる第２シート層との間に弾性フィルムが積層されてなるとともに、弾性フィルムがそれらの表面に沿う伸縮方向に伸長された状態で、第１シート層及び第２シート層が、伸縮方向及びこれと直交する方向にそれぞれ間隔を空けて配列された多数の点状のシート接合部で、弾性フィルムに形成された貫通孔を通じて接合されてなるものである。このような弾性フィルム伸縮構造は、自然長状態では、シート接合部間において弾性フィルムが収縮するのに伴い、シート接合部の間隔が狭くなり、第１シート層及び第２シート層におけるシート接合部間に伸縮方向と交差する方向に延びる収縮皺が形成される。反対に伸長時には、シート接合部間において弾性フィルムが伸長するのに伴い、シート接合部の間隔及び第１シート層及び第２シート層における収縮皺が広がり、第１シート層及び第２シート層の完全展開状態まで弾性伸長が可能となる。この弾性フィルム伸縮構造は、面的なフィット性に優れるのはもちろん、第１シート層及び第２シート層と弾性フィルムとの接合が無く、かつ第１シート層及び第２シート層の接合も極めて少ないため非常に柔軟であり、また、弾性フィルムの貫通孔が通気性向上にも寄与するという利点がある。 The elastic film stretchable structure (hereinafter also referred to as an elastic film stretchable structure) is formed by laminating an elastic film between a first sheet layer made of a nonwoven fabric and a second sheet layer made of a nonwoven fabric, In a state where the elastic film is stretched in the stretching direction along the surface thereof, the first sheet layer and the second sheet layer are arranged in a number of dotted shapes arranged at intervals in the stretching direction and the direction orthogonal thereto. In the sheet joining portion, the sheet is joined through a through hole formed in the elastic film. Such an elastic film stretchable structure is such that, in the natural length state, as the elastic film contracts between the sheet joining portions, the interval between the sheet joining portions becomes narrow, and the sheet joining portions in the first sheet layer and the second sheet layer A contraction fold extending in the direction intersecting the expansion / contraction direction is formed therebetween. On the other hand, when the elastic film is stretched between the sheet joining portions at the time of stretching, the spacing between the sheet joining portions and the shrinkage wrinkles in the first sheet layer and the second sheet layer spread, and the first sheet layer and the second sheet layer Elastic extension is possible up to the fully deployed state. 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.

　弾性フィルム伸縮構造は、従来の細長状弾性部材の伸縮構造のように曲線状に配置することができない。このため、パンツタイプ使い捨ておむつにおいて、胴周り領域に幅方向の伸縮性を付加するとともに、股間部及びその前後近傍における脚の付け根へのフィット性を高めるために、脚周りの縁に沿って曲線状に細長状弾性部材を設けることが提案されている（特許文献２参照）。しかし、この場合、弾性フィルム伸縮構造を有する伸縮シートと、細長状弾性部材を曲線状に取り付けた伸縮シートとを別々に製造し、組み立てることとなり、製造が複雑になるだけでなく、伸縮シート同士を接合する部分が厚く硬くなることも問題となる。 The elastic film stretchable structure cannot be arranged in a curved shape like the conventional stretchable structure of an elongated elastic member. For this reason, in a pants-type disposable diaper, in order to add stretchability in the width direction to the waist area, and to improve fit to the base of the leg in the crotch part and its front and back, a curve along the edge around the leg It has been proposed to provide an elongated elastic member in a shape (see Patent Document 2). However, in this case, an elastic sheet having an elastic film elastic structure and an elastic sheet in which an elongated elastic member is attached in a curved shape are separately manufactured and assembled. It is also a problem that the portion to be bonded becomes thick and hard.

特許５２５０３７２号公報Japanese Patent No. 5250372 特開２０１１－２２４０４６号公報JP 2011-224046 A 特表２００４－５３２７５８号公報JP-T-2004-532758 特表２００９－５３６８４５号公報Special table 2009-536845 特開２０１１－１３６０９５号公報JP 2011-136095 A

　そこで本発明の第１の課題は、股間幅が狭く、より下着らしい外観のパンツタイプ使い捨ておむつを提供することにある。 Therefore, a first problem of the present invention is to provide a pants-type disposable diaper having a narrow crotch width and an appearance more like underwear.

　また、本発明の第２の課題は、弾性フィルム伸縮構造により胴周り領域に幅方向の伸縮性を付加したパンツタイプ使い捨ておむつにおいて、簡素な構造で、股間部及びその前後近傍における脚の付け根へのフィット性を向上させることにある。 In addition, the second problem of the present invention is that the pants-type disposable diaper has a stretchable structure in the width direction added to the waist area by an elastic film stretchable structure. It is to improve the fit.

　上記第１の課題を解決した本発明は次のとおりである。
　＜請求項１記載の発明＞
　前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から後身頃にわたるように外装体の内面に固定された、吸収体を含む内装体とを備え、
　前身頃の外装体の両側縁部と後身頃の外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつにおいて、
　前記外装体における内装体の固定領域のうち、前後方向の少なくとも股間部の領域は、幅方向に伸縮可能な伸縮領域とされており、
　前記伸縮領域は、第１シート層と、第２シート層との間に弾性フィルムが積層されるとともに、前記弾性フィルムが幅方向に伸長された状態で、前記第１シート層及び第２シート層が、幅方向及び前後方向にそれぞれ間隔を空けて配列された多数のシート接合部で、直接的又は間接的に接合された弾性フィルム伸縮構造とされている、
　ことを特徴とするパンツタイプ使い捨ておむつ。 The present invention that has solved the first problem is as follows.
<Invention of Claim 1>
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 fixed to the inner surface of the exterior body so as to extend from the front body to the back body,
A pants-type disposable diaper having a waist opening and a pair of left and right leg openings formed by joining side edges of the outer body of the front body and both side edges of the outer body of the rear body to form a side seal part In
Of the fixed area of the interior body in the exterior body, the area of at least the crotch part in the front-rear direction is an expansion / contraction area that can be expanded and contracted in the width direction,
In the stretchable region, an elastic film is laminated between the first sheet layer and the second sheet layer, and the elastic film is stretched in the width direction, and the first sheet layer and the second sheet layer Is an elastic film stretchable structure bonded directly or indirectly with a large number of sheet bonding portions arranged at intervals in the width direction and the front-rear direction,
A pants-type disposable diaper characterized by that.

　（作用効果）
　本発明では、外装体における内装体の固定領域のうち、前後方向の少なくとも股間部の領域は、弾性フィルム伸縮構造により幅方向に伸縮可能な伸縮領域とされているため、自然長状態では股間部が幅方向に収縮して狭くなり、非伸縮状態の吸収体の幅の割には、股間幅が狭く、より下着らしい外観となる。しかも、糸ゴム等の細長状弾性部材を用いて股間部を幅方向に収縮させた場合には、当該細長状弾性部材が配置された部分が線状に凹み、その凹凸によって下着らしい外観が得られないのに対して、弾性フィルム伸縮構造では弾性部材が面状に連続する弾性フィルムであるため、そのような問題点が無い。 (Function and effect)
In the present invention, among the fixed regions of the interior body in the exterior body, at least the region of the crotch portion in the front-rear direction is a stretchable region that can be stretched in the width direction by the elastic film stretchable structure. Shrinks in the width direction and narrows, and the width of the crotch is narrower than the width of the non-stretchable absorbent body, resulting in a more underwear-like appearance. In addition, when the crotch portion is shrunk in the width direction using an elongated elastic member such as rubber thread, the portion where the elongated elastic member is arranged is recessed in a linear shape, and the appearance of underwear is obtained by the unevenness. In contrast, in the elastic film stretchable structure, the elastic member is an elastic film that is continuous in a planar shape, and thus there is no such problem.

　＜請求項２記載の発明＞
　前記弾性フィルム伸縮構造を有する伸縮領域は、前記外装体における内装体の固定領域及びその周囲の領域にわたり設けられており、前記内装体の固定領域における前記シート接合部の面積率が、前記周囲の領域における前記シート接合部の面積率よりも高い、請求項１記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 2>
The stretchable region having the elastic film stretchable structure is provided over the fixed region of the interior body and the surrounding region thereof in the exterior body, and the area ratio of the sheet joint portion in the fixed region of the interior body is the surrounding area. The pants-type disposable diaper according to claim 1, wherein the pants-type disposable diaper is higher than an area ratio of the sheet joint portion in a region.

　（作用効果）
　本発明のような弾性フィルム伸縮構造では、基本的に、シート接合部の面積率が高くなるほど第１シート層及び第２シート層が弾性フィルムにより収縮する部分が少なくなり、収縮量が低下する。よって、上記のように構成すると、外装体における内装体の固定領域における幅方向の収縮量を、周囲領域の幅方向収縮量よりも低下させることができ、内装体が幅方向に収縮することに起因する吸収性や装着感への悪影響を防止することができる。一般に、周囲領域は、幅方向の収縮量を多くして弾性限界伸びを高くすることが望ましいが、内装体の固定領域は内装体とともに収縮するため、周囲領域と同様に収縮させると、吸収性や装着感に悪影響を及ぼすおそれがある。 (Function and effect)
In the elastic film stretchable structure as in the present invention, basically, the higher the area ratio of the sheet bonding portion, the smaller the portion where the first sheet layer and the second sheet layer shrink due to the elastic film, and the shrinkage amount decreases. Therefore, if comprised as mentioned above, the amount of shrinkage in the width direction in the fixed region of the interior body in the exterior body can be made lower than the amount of shrinkage in the width direction of the surrounding region, and the interior body shrinks in the width direction. It is possible to prevent an adverse effect on the resulting absorbency and wearing feeling. In general, it is desirable to increase the elastic limit elongation by increasing the amount of shrinkage in the width direction in the surrounding area, but the fixed area of the interior body shrinks together with the interior body. And may adversely affect the fit.

　＜請求項３記載の発明＞
　個々の前記シート接合部の面積は０．１４～３．５ｍｍ2であり、
　前記内装体の固定領域における前記シート接合部の面積率は５～２５％であり、
　前記周囲の領域における前記シート接合部の面積率は１．８～１９．１％である、請求項２記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 3>
The area of each sheet joint is 0.14 to 3.5 mm 2 ,
The area ratio of the sheet joint portion in the fixed region of the interior body is 5 to 25%,
The pants-type disposable diaper according to claim 2, wherein an area ratio of the sheet joint portion in the peripheral region is 1.8 to 19.1%.

　（作用効果）
　各部におけるシート接合部の面積及びシート接合部の面積率は適宜定めれば良いが、通常の場合、上記範囲内とすることが望ましい。 (Function and effect)
The area of the sheet bonding portion and the area ratio of the sheet bonding portion in each portion may be determined as appropriate, but in the normal case, it is desirable to be within the above range.

　＜請求項４記載の発明＞
　前記内装体の固定領域における弾性限界伸びは１３０～２００％であり、
　前記周囲の領域における弾性限界伸びは２００％以上である、請求項２又は３記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 4>
The elastic limit elongation in the fixed region of the interior body is 130 to 200%,
The pants-type disposable diaper according to claim 2 or 3, wherein the elastic limit elongation in the surrounding region is 200% or more.

　（作用効果）
　各部における弾性限界伸びは適宜定めれば良いが、通常の場合、上記範囲内とすることが望ましい。 (Function and effect)
The elastic limit elongation at each portion may be determined as appropriate, but in the normal case, it is preferably within the above range.

　＜請求項５記載の発明＞
　前記前身頃の前記内装体の固定領域における前記シート接合部の面積率が、前記後身頃の前記内装体の固定領域における前記シート接合部の面積率よりも低い、請求項１～４のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 5>
The area ratio of the sheet joint portion in the fixing region of the interior body in the front body is lower than the area ratio of the sheet joint portion in the fixing region of the interior body in the rear body. The pants-type disposable diaper according to item 1.

　（作用効果）
　本発明のような弾性フィルム伸縮構造では、基本的に、シート接合部の面積率が高くなるほど第１シート層及び第２シート層が弾性フィルムにより収縮する部分が少なくなり、収縮量が低下する。よって、上記のように、前身頃の内装体の固定領域におけるシート接合部の面積率が、後身頃の内装体の固定領域におけるシート接合部の面積率よりも低いと、自然長状態では、前身頃の内装体固定領域が後身頃の内装体固定領域よりも幅方向に収縮し、脚開口の全周形状を前側から視認することができ、より下着らしい外観となる。 (Function and effect)
In the elastic film stretchable structure as in the present invention, basically, the higher the area ratio of the sheet bonding portion, the smaller the portion where the first sheet layer and the second sheet layer shrink due to the elastic film, and the shrinkage amount decreases. Therefore, as described above, when the area ratio of the sheet joint portion in the fixing region of the interior body in the front body is lower than the area ratio of the sheet joint portion in the fixing region of the interior body in the rear body, The inner body fixing region at the time contracts in the width direction more than the inner body fixing region at the rear body, and the entire shape of the leg opening can be visually recognized from the front side, resulting in a more underwear-like appearance.

　＜請求項６記載の発明＞
　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記内装体の固定領域における前記シート接合部の面積率が、前後方向中央からウエスト開口側に向かうにつれて段階的又は連続的に高くなる、
　請求項１～５のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 6>
The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The area ratio of the sheet joint portion in the fixed region of the interior body is increased stepwise or continuously from the center in the front-rear direction toward the waist opening side,
The pants-type disposable diaper according to any one of claims 1 to 5.

　（作用効果）
　本発明のような弾性フィルム伸縮構造では、基本的に、シート接合部の面積率が高くなるほど第１シート層及び第２シート層が弾性フィルムにより収縮する部分が少なくなり、収縮量が低下する。よって、上記のように、内装体の固定領域におけるシート接合部の面積率が、前後方向中央からウエスト開口側に向かうにつれて段階的又は連続的に高くなると、自然長状態では、内装体固定領域が前後方向中央に向かうほど幅方向に収縮し、より下着らしい外観となるとともに、脚の付け根に対するフィット性も良好となる。 (Function and effect)
In the elastic film stretchable structure as in the present invention, basically, the higher the area ratio of the sheet bonding portion, the smaller the portion where the first sheet layer and the second sheet layer shrink due to the elastic film, and the shrinkage amount decreases. Therefore, as described above, when the area ratio of the sheet joint portion in the fixing region of the interior body increases stepwise or continuously from the center in the front-rear direction toward the waist opening side, in the natural length state, the interior body fixing region is As it goes to the center in the front-rear direction, it shrinks in the width direction, resulting in a more underwear-like appearance and better fit to the base of the legs.

　＜請求項７記載の発明＞
　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記吸収体は、ウエスト開口側から前後方向中央に向かうにつれて幅が段階的又は連続的に狭くなる形状を有している、
　請求項１～６のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 7>
The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The absorber has a shape in which the width gradually or continuously narrows from the waist opening side toward the center in the front-rear direction.
The pants-type disposable diaper according to any one of claims 1 to 6.

　（作用効果）
　吸収体をこのような形状とすることにより、弾性フィルム伸縮構造による収縮量が前後方向に同一であっても、自然長状態で股間部をその前後両側よりも狭い形状とすることができ、より下着らしい外観とすることができる。 (Function and effect)
By making the absorbent body in such a shape, even if the amount of contraction due to the elastic film stretchable structure is the same in the front-rear direction, the crotch portion can be made narrower than the front and rear sides in the natural length state. Appearance that seems to be underwear.

　＜請求項８記載の発明＞
　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記吸収体は、ウエスト開口側から股間部側に向かうにつれて幅が段階的又は連続的に広くなる形状の、周囲よりも目付けが低い低目付部を有している、
　請求項１～７のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 8>
The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The absorbent body has a low basis weight part having a lower basis weight than the surroundings in a shape in which the width gradually or continuously widens from the waist opening side toward the crotch part side,
The pants-type disposable diaper according to any one of claims 1 to 7.

　（作用効果）
　吸収体にこのような形状の低目付部を有することにより、低目付部が相対的に低剛性で幅方向に収縮しやすくなる結果、弾性フィルム伸縮構造による収縮量が前後方向に同一であっても、また吸収体の幅が前後方向に同一であっても、自然長状態で股間部をその前後両側よりも狭い形状とすることができ、より下着らしい外観とすることができる。 (Function and effect)
By having the low basis weight part of such shape in the absorbent body, the low basis weight part is relatively low in rigidity and easily contracts in the width direction, so that the amount of contraction by the elastic film stretchable structure is the same in the front-rear direction. In addition, even when the width of the absorbent body is the same in the front-rear direction, the crotch portion can be made narrower than the front and rear sides in the natural length state, and the appearance can be more like underwear.

　上記第２の課題を解決した本発明は次のとおりである。
　＜請求項９記載の発明＞
　前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から股間部を経て後身頃に達するように前記外装体に取り付けられた、吸収体を含む内装体とを備え、
　前記前身頃における前記外装体の両側縁部と前記後身頃における前記外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成された、
　パンツタイプ使い捨ておむつにおいて、
　前記吸収体の股間部に、前後両側よりも幅の狭い括れ部分が形成されるとともに、前記内装体における、前記吸収体の括れ部分と対応する両側部が、吸収体を有しない無吸収体側部とされており、
　前記外装体は、前記吸収体の側縁より側方に延在されており、
　前記内装体は、一方の前記無吸収体側部から他方の前記無吸収体側部にわたる幅で、かつ無吸収体側部の前後両側にわたる内外固定領域で、前記外装体に固定されており、
　前記内装体の両側縁から装着者の肌側に立ち上がる立体ギャザーが、前記無吸収体側部の前後両側にかけて設けられており、
　前記外装体は、前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前身頃及び後身頃の少なくとも一方における、前記サイドシール部と対応する前後方向範囲内にかけて、第１シート層及び第２シート層の間に弾性フィルムが積層されるとともに、前記第１シート層及び第２シート層が、間隔を空けて配列された多数のシート接合部で直接的又は間接的に接合された、弾性フィルム伸縮構造を有しており、
　前記外装体における前記弾性フィルム伸縮構造を有する領域は、前記弾性フィルムの収縮により幅方向に収縮しているとともに、幅方向に伸長可能である伸縮領域を有しており、
　この伸縮領域は、前記内外固定領域のうち少なくとも前記無吸収体側部を前記外装体に固定する部分を含み、
　前記外装体は、前記脚開口に沿って延びる細長状弾性伸縮部材を有しない、
　ことを特徴とするパンツタイプ使い捨ておむつ。 The present invention that has solved the second problem is as follows.
<Invention of Claim 9>
An exterior body that individually or integrally configures the front body and the back body, and an interior body including an absorber attached to the exterior body so as to reach the back body from the front body through the crotch part,
A waist opening and a pair of left and right leg openings are formed by joining the side edge portions of the exterior body in the front body and the side edge portions of the exterior body in the back body to form a side seal portion. ,
In pants-type disposable diapers,
In the crotch portion of the absorbent body, a narrowed portion narrower than both front and rear sides is formed, and both side portions of the interior body corresponding to the narrowed portion of the absorbent body have no absorbent body. And
The exterior body extends laterally from a side edge of the absorber,
The interior body is fixed to the exterior body in a width extending from one non-absorbent body side to the other non-absorbent body side, and in the inner and outer fixing regions extending from the front and rear sides of the non-absorbent body side,
A three-dimensional gather that stands on the skin side of the wearer from both side edges of the interior body is provided over both front and rear sides of the non-absorbent body side,
The exterior body has a first sheet layer extending from the front-rear direction range corresponding to the narrowest portion of the constricted portion to the front-rear direction range corresponding to the side seal portion in at least one of the front body and the rear body. In addition, an elastic film is laminated between the second sheet layer, and the first sheet layer and the second sheet layer are directly or indirectly joined at a plurality of sheet joint portions arranged at intervals. , Has an elastic film stretchable structure,
The region having the elastic film stretchable structure in the exterior body has a stretchable region that is shrinkable in the width direction due to the shrinkage of the elastic film, and is stretchable in the width direction,
This stretchable region includes a portion for fixing at least the non-absorbent side of the inner and outer fixed region to the exterior body,
The exterior body does not have an elongated elastic elastic member extending along the leg opening,
A pants-type disposable diaper characterized by that.

　（作用効果）
　本発明では、内装体の無吸収体側部が外装体の伸縮領域に固定されているため、外装体の伸縮領域の収縮により内装体の無吸収体側部が幅方向中央側に収縮し、これに伴い立体ギャザーの立ち上がり位置が幅方向中央側に移動し、吸収体の括れ部分の側縁により近い位置、つまり装着者の股間幅に適した位置から立ち上がるため、股間部及びその前後近傍における脚の付け根へのフィット性が向上し、漏れ防止性が高いものとなる。しかも、脚開口に沿って延びる細長状弾性伸縮部材を有しないため、構造が簡素で、柔軟性が損なわれることもない。 (Function and effect)
In the present invention, since the non-absorbent body side portion of the interior body is fixed to the stretchable region of the exterior body, the non-absorbent body side portion of the interior body contracts to the center in the width direction due to the shrinkage of the stretchable region of the exterior body. Accordingly, the rising position of the three-dimensional gather moves to the center in the width direction and rises from a position closer to the side edge of the constricted portion of the absorber, i.e., a position suitable for the width of the wearer's crotch. The fit to the root is improved and the leakage prevention property is high. And since it does not have the elongate elastic expansion-contraction member extended along leg opening, a structure is simple and a softness | flexibility is not impaired.

　＜請求項１０記載の発明＞
　前記前身頃の外装体は、前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前記サイドシール部と対応する前後方向範囲内にかけて、前記弾性フィルム伸縮構造を有するとともに、その弾性フィルム伸縮構造を有する領域のうち、前記内外固定領域と重なる領域は、その側方に位置する領域より、弾性限界伸びが短い弱伸縮領域とされている、請求項９記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 10>
The outer body of the front body has the elastic film stretchable structure from the front-rear direction range corresponding to the narrowest part of the constricted part to the front-rear direction range corresponding to the side seal part, and its elasticity The pants-type disposable diaper according to claim 9, wherein a region overlapping with the inner / outer fixed region among regions having a film stretchable structure is a weak stretchable region having a shorter elastic limit elongation than a region located on a side thereof.

　（作用効果）
　このような弱伸縮領域を設けることにより、股間部及びその前後近傍における脚の付け根へのフィット性はもちろん、下腹部から股間にかけての身体部位に対する前身頃のフィット性、及び臀部から股間にかけての後身頃のフィット性も良好となる。特に、前身頃の弾性フィルム伸縮構造の弱伸縮領域により、排尿時における前側の吸収体の膨張（一般に前側が後側よりも膨張しやすい）を抑制し、下着のような外観を維持することができる。 (Function and effect)
By providing such a weakly stretchable region, not only the fit to the base of the leg in the crotch and its front and back, but also the fit of the front body to the body part from the lower abdomen to the crotch, and the back from the buttocks to the crotch The body fit is also good. In particular, the weak stretch region of the elastic film stretch structure of the front body suppresses the expansion of the front absorbent body during urination (generally the front side is easier to expand than the rear side), and maintains the appearance like underwear it can.

　＜請求項１１記載の発明＞
　前記後身頃の外装体は、前記サイドシール部と対応する前後方向範囲及びその前側の前後方向範囲内にかけて、前記弾性フィルム伸縮構造を有するとともに、その弾性フィルム伸縮構造を有する領域のうち、前記内外固定領域と重なる領域は非伸縮領域とされている、請求項１０記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 11>
The outer body of the rear body has the elastic film stretchable structure over the front-rear direction range corresponding to the side seal portion and the front-rear direction range, and the inner and outer sides of the region having the elastic film stretchable structure. The underpants type disposable diaper according to claim 10, wherein a region overlapping with the fixed region is a non-stretchable region.

　（作用効果）
　このような前後非対称構造とすることにより、股間部及びその前後近傍における脚の付け根へのフィット性はもちろん、下腹部から股間にかけての身体部位に対する前身頃のフィット性、及び股間から臀部の膨らみにかけての後身頃のフィット性も良好となる。また、前述のように、前身頃の弾性フィルム伸縮構造の弱伸縮領域により、排尿時における前側の吸収体の膨張（一般に前側が後側よりも膨張しやすい）を抑制し、下着のような外観を維持することができる。 (Function and effect)
By adopting such a front-rear asymmetric structure, not only the fit to the crotch and the base of the leg in the vicinity of the crotch, but also the fit of the front body to the body part from the lower abdomen to the crotch, and the swelling of the crotch to the buttocks The fit of the back body is also good. In addition, as described above, the weak stretch region of the elastic film stretch structure of the front body suppresses the expansion of the front absorbent body during urination (generally the front side is easier to expand than the rear side), and looks like underwear Can be maintained.

　＜請求項１２記載の発明＞
　前記前身頃及び後身頃のそれぞれに弾性フィルム伸縮構造を有するとともに、前記前身頃の弾性フィルム伸縮構造を構成する弾性フィルムと、前記後身頃の弾性フィルム伸縮構造を構成する弾性フィルムとが前後別々でかつ前後方向に離間しており、
　前記前身頃の弾性フィルム伸縮構造を構成する弾性フィルムの後端が、パンツタイプ使い捨ておむつの前後方向中央から前側に６０ｍｍまでの範囲内に位置されている、請求項１０又は１１記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 12>
Each of the front body and the back body has an elastic film stretchable structure, and the elastic film constituting the elastic film stretchable structure of the front body and the elastic film constituting the elastic film stretchable structure of the back body are separated front and back And separated in the front-rear direction,
12. The pant-type disposable according to claim 10, wherein a rear end of the elastic film constituting the elastic film stretchable structure of the front body is located within a range of 60 mm from the center in the front-rear direction of the pant-type disposable diaper to the front side. Diapers.

　（作用効果）
　前身頃及び後身頃で弾性フィルムを別々に取り付けることにより、外装体に取り付ける弾性フィルムの前後方向寸法を短くすることができ、製造が容易となる。 (Function and effect)
By attaching the elastic film separately in the front body and the back body, the front-rear direction dimension of the elastic film attached to the exterior body can be shortened, and the manufacture becomes easy.

　＜請求項１３記載の発明＞
　前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前記サイドシール部と対応する前後方向範囲内にかけて設けられた前記弾性フィルム伸縮構造における前記伸縮領域は、前記サイドシール部から前記無吸収体側部と重なる領域の側縁までの脚開口の縁部領域では、そのウエスト側に隣接する部分よりも幅方向の伸長応力が弱い、請求項９～１２のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 13>
The stretchable region in the elastic film stretchable structure provided from the front-rear direction range corresponding to the narrowest portion of the constricted portion to the front-rear direction range corresponding to the side seal portion is from the side seal portion to the The extension stress in the width direction is weaker in the edge region of the leg opening up to the side edge of the region overlapping with the non-absorbent side portion than in the portion adjacent to the waist side. Pants-type disposable diaper.

　（作用効果）
　このように構成することにより、脚開口の縁部領域の肌触りがサイドシール部から無吸収体側部と重なる領域までほぼ同様に柔軟となり、無吸収体側部のみが幅方向に収縮することによる違和感が軽減される。 (Function and effect)
By configuring in this way, the feel of the edge region of the leg opening becomes flexible in a similar manner from the side seal portion to the region overlapping the non-absorbent side, and there is a sense of incongruity due to contraction of only the non-absorbent side in the width direction. It is reduced.

　以上のとおり、第１の課題を解決する本発明によれば、股間幅が狭く、より下着らしい外観のパンツタイプ使い捨ておむつとなる、等の利点がもたらされる。また、第２の課題を解決する本発明によれば、弾性フィルム伸縮構造により胴周り領域に幅方向の伸縮性を付加したパンツタイプ使い捨ておむつにおいて、簡素な構造で、股間部及びその前後近傍における脚の付け根へのフィット性を向上させることができる、等の利点がもたらされる。 As described above, according to the present invention that solves the first problem, there are advantages such as a pants-type disposable diaper having a narrow crotch width and an appearance more like underwear. Further, according to the present invention for solving the second problem, in the pants-type disposable diaper in which the stretchability in the width direction is added to the waist region by the elastic film stretchable structure, the crotch portion and the front and back thereof in a simple structure Advantages such as being able to improve the fit to the base of the leg are provided.

完全展開状態のパンツタイプ使い捨ておむつの平面図（内面側）である。It is a top view (inner surface side) of the underpants type disposable diaper of a full deployment state. 完全展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a full deployment state. （ａ）は外装体の要部平面図、（ｂ）は（ａ）のＤ－Ｄ断面図、（ｃ）は装着状態における断面図、（ｄ）は自然長状態における断面図である。(A) is a plan view of the main part of the exterior body, (b) is a sectional view taken along the line DD in (a), (c) is a sectional view in the mounted state, and (d) is a sectional view in the natural length state. （ａ）は図１のＣ－Ｃ断面図、（ｂ）は図１のＥ－Ｅ断面図である。(A) is a CC cross-sectional view of FIG. 1, and (b) is an EE cross-sectional view of FIG. 図１のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG. 図１のＢ－Ｂ断面図である。FIG. 3 is a cross-sectional view taken along the line BB in FIG. 完全展開状態のパンツタイプ使い捨ておむつの要部のみ示す平面図である。It is a top view which shows only the principal part of the underpants type disposable diaper of a full expansion | deployment state. 幅方向にある程度伸長した外装体の要部断面を概略的に示す断面図である。It is sectional drawing which shows roughly the principal part cross section of the exterior body extended to some extent in the width direction. シート接合部のパターンを示す要部拡大平面図である。It is a principal part enlarged plan view which shows the pattern of a sheet | seat junction part. シート接合部のパターンを示す要部拡大平面図である。It is a principal part enlarged plan view which shows the pattern of a sheet | seat junction part. 完全展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a full deployment state. 完全展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a full deployment state. 図１２のＦ－Ｆ断面図である。FIG. 13 is a sectional view taken along line FF in FIG. 12. 外装体のサンプルの自然長状態及び伸長状態における写真である。It is the photograph in the natural-length state and expansion | extension state of the sample of an exterior body. シート接合部の各種配列例を示す平面図である。It is a top view which shows the various arrangement | sequence examples of a sheet | seat junction part. シート接合部の拡大写真である。It is an enlarged photograph of a sheet joined part. 第１シート層及び第２シート層を剥離した状態のシート接合部の拡大写真である。It is an enlarged photograph of the sheet joined part in the state where the first sheet layer and the second sheet layer are peeled off. パンツタイプ使い捨ておむつの製造フローを示す概略図である。It is the schematic which shows the manufacture flow of a pants type disposable diaper. 外装体組立工程の概略図である。It is the schematic of an exterior body assembly process. パンツタイプ使い捨ておむつの各種自然長状態を示す概略図である。It is the schematic which shows various natural length states of a pants type disposable diaper. 展開状態のパンツタイプ使い捨ておむつの平面図（内面側）である。It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. 展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. （ａ）は図２１のＣ－Ｃ断面図、（ｂ）は図２１のＥ－Ｅ断面図である。21A is a cross-sectional view taken along the line CC in FIG. 21, and FIG. 21B is a cross-sectional view taken along the line EE in FIG. 図２１のＡ－Ａ断面図である。FIG. 22 is a sectional view taken along line AA in FIG. 21. 図２１のＢ－Ｂ断面図である。FIG. 22 is a sectional view taken along line BB in FIG. 21. サンプルの伸縮領域の（ａ）平面方向からの顕微鏡写真、（ｂ）平面方向からの高倍率顕微鏡写真、（ｃ）斜視方向からの高倍率顕微鏡写真である。It is the (a) microscope picture from a plane direction of the expansion-contraction area | region of a sample, (b) the high magnification microscope picture from a plane direction, (c) The high magnification microscope picture from a perspective direction. （ａ）は伸縮領域の要部平面図、（ｂ）は（ａ）のＤ－Ｄ断面図、（ｃ）は装着状態における断面図、（ｄ）は自然長状態における断面図である。(A) is a plan view of the main part of the stretchable region, (b) is a sectional view taken along the line DD in (a), (c) is a sectional view in the mounted state, and (d) is a sectional view in the natural length state. サンプルの伸縮領域の（ａ）平面方向からの顕微鏡写真、（ｂ）平面方向からの高倍率顕微鏡写真、（ｃ）斜視方向からの高倍率顕微鏡写真である。It is the (a) microscope picture from a plane direction of the expansion-contraction area | region of a sample, (b) the high magnification microscope picture from a plane direction, (c) The high magnification microscope picture from a perspective direction. （ａ）は非伸縮領域の要部平面図、（ｂ）は（ａ）のＤ－Ｄ断面図、（ｃ）は装着状態における断面図、（ｄ）は自然長状態における断面図である。(A) is a plan view of the main part of the non-stretchable region, (b) is a DD sectional view of (a), (c) is a sectional view in a mounted state, and (d) is a sectional view in a natural length state. サンプルの非伸縮領域の写真である。It is a photograph of the non-stretchable region of the sample. 非伸縮領域の要部拡大平面図である。It is a principal part enlarged plan view of a non-expandable region. 装着状態の要部を概略的に示す股間部断面図である。It is a crotch part sectional drawing which shows the principal part of a mounting state schematically. 展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. （ａ）は図３１のＣ－Ｃ断面図、（ｂ）は図３１のＥ－Ｅ断面図である。(A) is a CC cross-sectional view of FIG. 31, and (b) is an EE cross-sectional view of FIG. ある程度伸長した外装体の要部断面を概略的に示す断面図である。It is sectional drawing which shows roughly the principal part cross section of the exterior body extended to some extent. ある程度伸長した外装体の要部断面を概略的に示す断面図である。It is sectional drawing which shows roughly the principal part cross section of the exterior body extended to some extent. （ａ）第１溶着形態で形成されたシート接合部の平面写真、（ｂ）第３溶着形態で形成されたシート接合部の平面写真である。(A) The plane photograph of the sheet | seat junction part formed with the 1st welding form, (b) The plane photograph of the sheet | seat junction part formed with the 3rd welding form. 超音波シール装置の概略図である。It is the schematic of an ultrasonic sealing apparatus.

　以下、本発明の一実施形態について、添付図面を参照しつつ詳説する。なお、断面図中の点模様部分はホットメルト接着剤等の接合手段を示している。
　＜共通的事項について＞
　図１～図７はパンツタイプ使い捨ておむつを示している。このパンツタイプ使い捨ておむつ（以下、単におむつともいう。）は、前身頃Ｆ及び後身頃Ｂを構成する一体的な外装体２０と、この外装体２０の内面に固定され一体化された内装体１０とを有しており、内装体１０は液透過性のトップシート１１と液不透過性シート１２との間に吸収体１３が介在されてなるものである。製造に際しては、外装体２０の内面（上面）に対して内装体１０の裏面がホットメルト接着剤などの接合手段によって接合された後に、内装体１０及び外装体２０が前身頃Ｆ及び後身頃Ｂの境界である前後方向（縦方向）中央で折り畳まれ、その両側部が相互に熱溶着又はホットメルト接着剤などによって接合されてサイドシール部２１が形成されることによって、ウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつとなる。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the dotted pattern part in sectional drawing has shown joining means, such as a hot-melt-adhesive.
<Common matters>
1 to 7 show a pants-type disposable diaper. This pants-type disposable diaper (hereinafter, also simply referred to as a diaper) includes an integral exterior body 20 constituting a front body F and a back body B, and an interior body 10 fixed and integrated on the inner surface of the exterior body 20. The interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12. In manufacturing, after the back surface of the interior body 10 is joined to the inner surface (upper surface) of the exterior body 20 by a joining means such as a hot melt adhesive, the interior body 10 and the exterior body 20 are the front body F and the back body B. Are folded at the center in the front-rear direction (longitudinal direction), and the side seal portions 21 are formed by joining both sides thereof by heat welding or hot melt adhesive, thereby forming a waist opening and a pair of left and right A pants-type disposable diaper in which leg openings are formed.

　（内装体の構造例）
　内装体１０は、図４～図６に示すように、不織布などからなるトップシート１１と、ポリエチレン等からなる液不透過性シート１２との間に、吸収体１３を介在させた構造を有しており、トップシート１１を透過した排泄液を吸収保持するものである。内装体１０の平面形状は特に限定されないが、図示形態のようにほぼ長方形とすることが一般的である。 (Structural example of interior body)
As shown in FIGS. 4 to 6, the interior body 10 has a structure in which an absorber 13 is interposed between a top sheet 11 made of nonwoven fabric or the like and a liquid-impermeable sheet 12 made of polyethylene or the like. It absorbs and retains excreted liquid that has permeated the top sheet 11. The planar shape of the interior body 10 is not particularly limited, but is generally rectangular as illustrated.

　吸収体１３の表側（肌当接側）を覆うトップシート１１としては、有孔又は無孔の不織布や多孔性プラスチックシートなどが好適に用いられる。不織布を構成する素材繊維は、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工法によって得られた不織布を用いることができる。これらの加工法の内、スパンレース法は柔軟性、ドレープ性に富む点で優れ、サーマルボンド法は嵩高でソフトである点で優れている。トップシート１１に多数の透孔を形成した場合には、尿などが速やかに吸収されるようになり、ドライタッチ性に優れたものとなる。トップシート１１は、吸収体１３の側縁部を巻き込んで吸収体１３の裏側まで延在している。 As the top sheet 11 covering the front side (skin contact side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. 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. When a large number of through holes are formed in the top sheet 11, urine and the like are quickly absorbed, and the dry touch properties are excellent. The top sheet 11 entrains the side edge of the absorber 13 and extends to the back side of the absorber 13.

　吸収体１３の裏側（非肌当接側）を覆う液不透過性シート１２は、ポリエチレン又はポリプロピレンなどの液不透過性プラスチックシートが用いられるが、近年はムレ防止の点から透湿性を有するものが好適に用いられる。この遮水・透湿性シートは、例えばポリエチレンやポリプロピレン等のオレフィン樹脂中に無機充填材を溶融混練してシートを形成した後、一軸又は二軸方向に延伸することにより得られる微多孔性シートである。 As the liquid-impermeable sheet 12 covering the back side (non-skin contact side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used, but in recent years, it has moisture permeability from the viewpoint of preventing stuffiness. 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.

　吸収体１３としては、公知のもの、例えばパルプ繊維の積繊体、セルロースアセテート等のフィラメントの集合体、あるいは不織布を基本とし、必要に応じて高吸収性ポリマーを混合、固着等してなるものを用いることができる。この吸収体１３は、形状及びポリマー保持等のため、必要に応じてクレープ紙等の、液透過性及び液保持性を有する包装シート１４によって包装することができる。
　吸収体１３の形状は、股間部に前後両側よりも幅の狭い括れ部分１３Ｎを有するほぼ砂時計状に形成されているが、長方形状等、適宜の任意形状とすることができる。括れ部分１３Ｎの寸法は適宜定めることができるが、括れ部分１３Ｎの前後方向長さはおむつ全長の２０～５０％程度とすることができ、その最も狭い部分の幅は吸収体１３の全幅の４０～６０％程度とすることができる。このような括れ部分１３Ｎを有する場合において、内装体１０の平面形状がほぼ長方形とされていると、内装体１０における吸収体１３の括れ部分１３Ｎと対応する部分に、吸収体１３を有しない余り部分である無吸収体側部１７（図７参照）が形成される。 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 absorber 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides in 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%. In the case of having such a 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 have the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13 A non-absorber side portion 17 (see FIG. 7) as a part is formed.

　内装体１０の両側部には脚周りにフィットする立体ギャザー９０が形成されている。この立体ギャザー９０は、図５及び図６に示されるように、内装体の裏面の側部に固定された固定部９１と、この固定部９１から内装体１０の側方を経て内装体１０の表面の側部まで延在する本体部９２と、本体部９２の前後端部が倒伏状態で内装体の表面の側部に固定されて形成された倒伏部分９３と、この倒伏部分９３間が非固定とされて形成された自由部分９４とを有している。これらの各部は、不織布などのシートを折り返して二重シートとしたギャザーシート９５により形成されている。 3D gathers 90 that fit around the legs are formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather 90 includes a fixing portion 91 fixed to the side portion of the back surface of the interior body, and the interior body 10 through the side of the interior body 10 from the fixing portion 91. A body portion 92 that extends to the side of the surface, a lying portion 93 formed by fixing the front and rear ends of the body portion 92 to the side of the surface of the interior body in a lying state, and the space between the lying portions 93 are not And a free portion 94 formed fixed. Each of these parts is formed of a gather sheet 95 which is a double sheet obtained by folding a sheet such as a nonwoven fabric.

　また、二重シート間には、自由部分の先端部等に細長状ギャザー弾性部材９６が配設されている。ギャザー弾性部材９６は、製品状態において図５に二点鎖線で示すように、弾性伸縮力により自由部分を起立させて立体ギャザー９０を形成するためのものである。 Also, between the double sheets, an elongated gather elastic member 96 is disposed at the tip of the free part. The gather elastic member 96 is for forming a three-dimensional gather 90 by raising a free part by elastic expansion and contraction force as shown by a two-dot chain line in FIG. 5 in the product state.

　液不透過性シート１２は、トップシート１１とともに吸収体１３の幅方向両側で裏側に折り返されている。この液不透過性シート１２としては、排便や尿などの褐色が出ないように不透明のものを用いるのが望ましい。不透明化としては、プラスチック中に、炭酸カルシウム、酸化チタン、酸化亜鉛、ホワイトカーボン、クレイ、タルク、硫酸バリウムなどの顔料や充填材を内添してフィルム化したものが好適に使用される。 The liquid-impermeable sheet 12 is folded back on the both sides in the width direction of the absorber 13 together with the top sheet 11. As this liquid-impermeable sheet 12, it is desirable to use an opaque sheet so that brown color such as defecation and urine does not appear. As the opacification, 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.

　ギャザー弾性部材９６としては、通常使用されるスチレン系ゴム、オレフィン系ゴム、ウレタン系ゴム、エステル系ゴム、ポリウレタン、ポリエチレン、ポリスチレン、スチレンブタジエン、シリコン、ポリエステル等の素材を用いることができる。また、外側から見え難くするため、太さは９２５ｄｔｅｘ以下、テンションは１５０～３５０％、間隔は７．０ｍｍ以下として配設するのがよい。なお、ギャザー弾性部材９６としては、図示形態のような糸状の他、ある程度の幅を有するテープ状のものを用いることもできる。 As the gather elastic member 96, 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. As the gather elastic member 96, a tape-like member having a certain width can be used in addition to the thread-like shape shown in the figure.

　前述のギャザーシート９５を構成する素材繊維もトップシート１１と同様に、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、アミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工方法に得られた不織布を用いることができるが、特にはムレを防止するために坪量を抑えて通気性に優れた不織布を用いるのがよい。さらにギャザーシート９５については、尿などの透過を防止するとともに、カブレを防止しかつ肌への感触性（ドライ感）を高めるために、シリコン系、パラフィン金属系、アルキルクロミッククロイド系撥水剤などをコーティングした撥水処理不織布を用いるのが望ましい。 In the same manner as the top sheet 11, the material fiber constituting the gather sheet 95 is not only synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and amides, but also regenerated fibers such as rayon and cupra, and natural fibers such as cotton. Nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is better to use a nonwoven fabric that suppresses and has excellent air permeability. Furthermore, for the gather sheet 95, in order to prevent permeation of urine and the like, to prevent fogging and to improve 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.

　図７に示すように、内装体１０はその裏面が、内外固定領域１５（斜線領域）において、外装体２０の内面に対してホットメルト接着剤等により固定される。この内外固定領域１５は、一方の無吸収体側部１７から他方の無吸収体側部１７にわたる幅で、無吸収体側部１７の前後両側にわたり延在される。内外固定領域１５の側縁は、無吸収体側部１７の幅方向中間より側方に位置していることが好ましく、特に内装体１０の幅方向のほぼ全体、及び前後方向のほぼ全体にわたり外装体２０に固定されているとより好ましい。 As shown in FIG. 7, the back surface of the interior body 10 is fixed to the inner surface of the exterior body 20 with a hot-melt adhesive or the like in the inner / outer fixing area 15 (shaded area). The inner / outer fixing region 15 extends from one non-absorbent body side portion 17 to the other non-absorbent body side portion 17 over both front and rear sides of the non-absorbent body side portion 17. The side edge of the inner / outer fixing region 15 is preferably positioned laterally from the middle in the width direction of the non-absorbent body side portion 17, and in particular, the exterior body over substantially the entire width direction of the interior body 10 and substantially the entire front-rear direction. More preferably, it is fixed to 20.

　（前後押さえシート）
　図１及び図４にも示されるように、外装体２０の内面上に取り付けられた内装体１０の前後端部をカバーし、且つ内装体１０の前後縁からの漏れを防ぐために、前後押さえシート５０，６０が設けられていても良い。図示形態についてさらに詳細に説明すると、前押さえシート５０は、前身頃Ｆの外装体２０の内面のうちウエスト端部領域２３の折り返し部分２０Ｃの内面から内装体１０の前端部と重なる位置まで幅方向全体にわたり延在しており、後押さえシート６０は、後身頃Ｂの外装体２０の内面のうちウエスト端部領域２３の折り返し部分２０Ｃの内面から内装体１０の後端部と重なる位置まで幅方向全体にわたり延在している。前後押さえシート５０，６０の股間側の縁部に幅方向の全体にわたり（中央部のみでも良い）若干の非接着部分を設けると、接着剤がはみ出ないだけでなく、この部分をトップシートから若干浮かせて防漏壁として機能させることができる。 (Front / rear holding sheet)
As shown in FIGS. 1 and 4, in order to cover the front and rear end portions of the interior body 10 attached on the inner surface of the exterior body 20 and to prevent leakage from the front and rear edges of the interior body 10, 50 and 60 may be provided. The illustrated embodiment will be described in more detail. The front presser sheet 50 extends in the width direction from the inner surface of the folded portion 20C of the waist end region 23 to the position overlapping the front end portion of the inner body 10 in the inner surface of the outer body 20 of the front body F. The rear presser sheet 60 extends in the width direction from the inner surface of the folded portion 20C of the waist end region 23 to the position overlapping the rear end portion of the inner body 10 in the inner surface of the outer body 20 of the back body B. It extends throughout. If a slight non-adhesive portion is provided over the entire width direction (or only the central portion) at the crotch side edges of the front and rear pressing sheets 50, 60, not only does the adhesive not protrude, but this portion is slightly removed from the top sheet. Can float and function as a leak-proof wall.

　図示形態のように、前後押さえシート５０，６０を別体として取り付けると、素材選択の自由度が高くなる利点があるものの、資材や製造工程が増加する等のデメリットもある。そのため、外装体２０をおむつ内面に折り返してなる折り返し部分２０Ｃを、内装体１０と重なる部分まで延在させて、前述の押さえシート５０，６０と同等の部分を形成することもできる。 As shown in the figure, when the front and rear press sheets 50 and 60 are attached as separate bodies, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portion 20C formed by folding the exterior body 20 on the inner surface of the diaper can be extended to a portion overlapping the interior body 10 to form a portion equivalent to the above-described pressing sheets 50 and 60.

　＜第１の課題を解決する形態について＞
　まず、図１～図２０を用いて、第１の課題を解決する形態について説明する。図示形態の外装体２０は、前身頃Ｆ及び後身頃Ｂを一体的に構成しており、前身頃Ｆと後身頃Ｂとが接合されたサイドシール部２１の縦方向範囲として定まる胴周り領域Ｔと、脚開口を形成する部分の前後方向範囲として定まる中間領域Ｌとを有しており、中間領域Ｌは内装体１０の幅方向両側に位置するカバー領域を有している。外装体２０の平面形状は、前後方向中間に、凹状の脚周りライン２９を形成する括れ部を有している。外装体２０は、前後に二分割して前身頃Ｆ及び後身頃Ｂを個別に構成し、両者が股間部で前後方向に離間するように配置しても良い。 <About the form to solve the first problem>
First, an embodiment for solving the first problem will be described with reference to FIGS. The exterior body 20 of the illustrated form integrally constitutes a front body F and a back body B, and a waist region T defined as a longitudinal range of the side seal portion 21 where the front body F and the back body B are joined. And an intermediate region L that is defined as a front-rear direction range of a portion that forms the leg opening, and the intermediate region L has cover regions that are located on both sides of the interior body 10 in the width direction. The planar shape of the exterior body 20 has a constricted portion that forms a concave leg-around line 29 in the middle in the front-rear direction. The exterior body 20 may be divided into two parts, the front body F and the back body B, which are separated from each other in the front-rear direction at the crotch portion.

　また、外装体２０には、図４にも示されるように、第１シート層２０Ａ及び第２シート層２０Ｂの間に、弾性フィルム３０及び幅方向に沿う細長状弾性部材２４が配設され、幅方向の伸縮性が付与されている。 In addition, as shown in FIG. 4, the exterior body 20 is provided with the elastic film 30 and the elongated elastic member 24 along the width direction between the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B. Elasticity in the width direction is given.

　より詳細に説明すると、外装体２０のウエスト部２３にはウエスト部弾性部材２４が設けられている。このウエスト部弾性部材２４は、縦方向に間隔をおいて配置された複数の糸ゴム等の細長状弾性部材であり、身体の胴周りを締め付けるように伸縮力を与えるものである。ウエスト部弾性部材２４は、間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように３～８ｍｍ程度の間隔を空けて、３本以上、好ましくは５本以上配置される。ウエスト部弾性部材２４の固定時の伸長率は適宜定めることができるが、通常の成人用の場合２３０～３２０％程度とすることができる。 More specifically, a waist elastic member 24 is provided on the waist 23 of the exterior body 20. The waist elastic member 24 is a plurality of elongated elastic members such as a plurality of rubber bands arranged at intervals in the vertical direction, and gives an elastic 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.

　ウエスト部弾性部材２４は、図示例では糸ゴムを用いたが、例えばテープ状の伸縮部材を用いても良く、またこれに代えて、後述の弾性フィルムをウエスト部２３まで延在させてもよい。図示形態のウエスト部弾性部材２４は、第２シート層２０Ｂの構成材をウエスト開口縁で内面側に折り返してなる折り返し部分２０Ｃに挟持されているが、第１シート層２０Ａの構成材と第２シート層２０Ｂの構成材との間に挟持しても良い。 In the illustrated example, 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 | interpose between the structural materials of the sheet | seat layer 20B.

　第１シート層２０Ａ及び第２シート層２０Ｂの構成材は、シート状のものであれば特に限定無く使用できるが、通気性及び柔軟性の観点から不織布を用いることが好ましい。不織布は、その原料繊維が何であるかは特に限定されない。例えば、ポリエチレンやポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維、レーヨンやキュプラ等の再生繊維、綿等の天然繊維などや、これらから二種以上が使用された混合繊維、複合繊維などを例示することができる。さらに、不織布は、どのような加工によって製造されたものであってもよい。加工方法としては、公知の方法、例えば、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法、エアスルー法、ポイントボンド法等を例示することができる。不織布を用いる場合、その目付けは１２～２０ｇ／ｍ2程度とするのが好ましい。また、第１シート層２０Ａ及び第２シート層２０Ｂは、一枚の資材を折り返して対向させた一対の層であっても良い。 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. For example, 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. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method 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. When using a nonwoven fabric, the basis weight is preferably about 12 to 20 g / m 2 . Further, 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.

　一方、図２に示すように、前身頃Ｆ及び後身頃Ｂの胴周り領域Ｔ及びそれらの間の中間領域Ｌにわたる領域は、図３に示すように、第１シート層２０Ａと、第２シート層２０Ｂとの間に弾性フィルム３０が積層されてなるとともに、弾性フィルム３０が幅方向に伸長された状態で、第１シート層２０Ａ及び第２シート層２０Ｂが、伸縮方向及びこれと直交する方向にそれぞれ間隔を空けて配列された多数のシート接合部４０で、弾性フィルム３０に形成された貫通孔３１を通じて接合されている。また、第１シート層２０Ａ及び第２シート層２０Ｂは、少なくともシート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂ間以外では弾性フィルム３０と接合されていない。その結果、図３（ｄ）に示すように、弾性フィルム３０の自然長状態では、シート接合部間の第１シート層２０Ａ及び第２シート層２０Ｂが互いに離間する方向に膨らんで、伸縮方向と交差する方向に延びる収縮皺２５が形成され、図３（ｃ）に示すように、幅方向にある程度伸長した装着状態でも、収縮皺２５は伸ばされるものの、残るようになっている。また、装着状態を想定した図３（ｃ）及び第１シート層２０Ａ及び第２シート層２０Ｂの完全展開状態を想定した図３（ａ）（ｂ）からも分かるように、これらの状態では、弾性フィルム３０における貫通孔３１とシート接合部４０との間に隙間が形成され、弾性フィルム３０の素材が無孔のフィルムやシートであっても、この隙間により通気性が付加される。このような伸長状態及び自然長状態の外観は図１４のサンプル写真にも現れている。 On the other hand, as shown in FIG. 2, the region extending over the waist region T of the front body F and the back body B and the intermediate region L between them includes the first sheet layer 20A and the second sheet as shown in FIG. The elastic film 30 is laminated between the layers 20B, and the first sheet layer 20A and the second sheet layer 20B are stretched in a direction perpendicular to the stretching direction in a state where the elastic film 30 is stretched in the width direction. Are joined through through holes 31 formed in the elastic film 30 at a large number of sheet joining portions 40 arranged at intervals. Further, 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 sheet joining portion 40. As a result, as shown in FIG. 3D, in the natural length state of the elastic film 30, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B between the sheet joining portions swell in a direction away from each other, A contraction ridge 25 extending in the intersecting direction is formed, and as shown in FIG. 3C, the contraction fold 25 is stretched but remains even in a mounted state where it extends to some extent in the width direction. In addition, as can be seen from FIG. 3C assuming the mounted state and FIGS. 3A and 3B assuming the fully expanded state of the first sheet layer 20A and the second sheet layer 20B, in these states, A gap is formed between the through hole 31 and the sheet bonding portion 40 in the elastic film 30, and even if the material of the elastic film 30 is a non-porous film or sheet, air permeability is added by this gap. The appearance in the stretched state and the natural length state also appears in the sample photograph of FIG.

　弾性フィルム３０は特に限定されるものではなく、それ自体弾性を有するものであれば特に限定なく用いることができ、例えば、スチレン系エラストマー、オレフィン系エラストマー、ポリエステル系エラストマー、ポリアミド系エラストマー及びポリウレタン系エラストマー等の熱可塑性エラストマーの１種又は２種以上のブレンド物を、Ｔダイ法やインフレーション法などの押出成形によりフィルム状に加工したものを用いることができる。また、弾性フィルム３０としては、無孔のものの他、通気のために多数の孔やスリットが形成されたものも用いることができる。特に、伸縮方向における引張強度が８～２５Ｎ／３５ｍｍ、伸縮方向と直交する方向における引張強度が５～２０Ｎ／３５ｍｍ、伸縮方向における引張伸度が４５０～１０５０％、及び伸縮方向と直交する方向における引張伸度が４５０～１４００％の弾性フィルム３０であると好ましい。弾性フィルム３０の厚みは特に限定されないが、２０～４０μｍ程度であるのが好ましい。また、弾性フィルム３０の目付は特に限定されないが、３０～４５ｇ／ｍ2程度であるのが好ましく、特に３０～３５ｇ／ｍ2程度であるのが好ましい。 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. In particular, 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%, and the direction perpendicular to the stretching direction. The elastic film 30 having a tensile elongation of 450 to 1400% is preferable. The thickness of the elastic film 30 is not particularly limited, but is preferably about 20 to 40 μm. 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 .

　特徴的には、図２に示すように、外装体２０における内装体１０の固定領域１５（図２中の斜線の領域）は一般的なパンツタイプ使い捨ておむつのように非伸縮領域とされておらず、その前後方向全体が弾性フィルム伸縮構造２０Ｘにより幅方向に伸縮可能な伸縮領域８０とされているため、自然長状態では図２０（ａ）に示すように、股間部が幅方向に収縮して狭くなり、非伸縮状態の吸収体１３の幅の割には、股間幅が狭く、より下着らしい外観となる。しかも、糸ゴム等の細長状弾性部材を用いて股間部を幅方向に収縮させた場合には、当該細長状弾性部材が配置された部分が線状に凹み、その凹凸によって下着らしい外観が得られないのに対して、弾性フィルム伸縮構造２０Ｘでは弾性部材が面状に連続する弾性フィルム３０であるため、そのような問題点が無い。 Characteristically, as shown in FIG. 2, the fixing region 15 (the hatched region in FIG. 2) of the inner body 10 in the outer body 20 is not a non-stretchable region like a general pants-type disposable diaper. However, since the entire front-rear direction is a stretchable region 80 that can be stretched in the width direction by the elastic film stretchable structure 20X, in the natural length state, the crotch portion contracts in the width direction as shown in FIG. The width of the crotch is narrower than the width of the non-stretchable absorbent body 13 and the appearance is more like underwear. In addition, when the crotch portion is shrunk in the width direction using an elongated elastic member such as rubber thread, the portion where the elongated elastic member is arranged is recessed in a linear shape, and the appearance of underwear is obtained by the unevenness. In contrast, in the elastic film stretchable structure 20X, since the elastic member is the elastic film 30 which is continuous in a planar shape, there is no such problem.

　本発明のような弾性フィルム伸縮構造２０Ｘでは、基本的に、シート接合部４０の面積率が高くなるほど第１シート層２０Ａ及び第２シート層２０Ｂが弾性フィルム３０により収縮する部分が少なくなり、収縮量が低下する。よって、このような特性を利用することにより、さらに好ましい形態とすることができる。例えば図１１に示すように、前身頃Ｆの内装体１０の固定領域１５Ｃにおけるシート接合部４０の面積率が、後身頃Ｂの内装体１０の固定領域１５Ｄにおけるシート接合部４０の面積率よりも低い形態とすると、自然長状態では、図２０（ｂ）に示すように、前身頃Ｆの内装体１０の固定領域１５Ｃが後身頃Ｂの内装体１０の固定領域１５Ｄよりも幅方向に収縮し、脚開口の全周形状を前側から視認することができ、より下着らしい外観となる。なお、シート接合部４０の面積率の変化は図中では点模様の密度の変化により表されており、収縮量の大小が二点鎖線矢印の長さで表されている。 In the elastic film stretchable structure 20X as in the present invention, basically, the higher the area ratio of the sheet joint portion 40, the smaller the portion of the first sheet layer 20A and the second sheet layer 20B that are contracted by the elastic film 30. The amount is reduced. Therefore, it can be set as a more preferable form by utilizing such a characteristic. For example, as shown in FIG. 11, the area ratio of the sheet bonding portion 40 in the fixing region 15C of the inner body 10 of the front body F is larger than the area ratio of the sheet bonding portion 40 in the fixing region 15D of the inner body 10 of the rear body B. In the natural length state, the fixed region 15C of the interior body 10 of the front body F contracts in the width direction more than the fixed region 15D of the interior body 10 of the back body B, as shown in FIG. The entire shape of the leg opening can be seen from the front side, and the appearance is more like underwear. In addition, the change of the area ratio of the sheet | seat junction part 40 is represented by the change of the density of a dot pattern in the figure, and the magnitude of shrinkage | contraction amount is represented by the length of the dashed-two dotted line arrow.

　また、図２に示す形態のように、弾性フィルム３０による伸縮領域８０が股間部の前後両側に延在されている場合、内装体１０の固定領域１５におけるシート接合部４０の面積率が、前後方向中央からウエスト開口側に向かうにつれて段階的（又は連続的でも良い）に高くされていると、自然長状態では、図２０（ｃ）に示すように、内装体１０を含む部分が前後方向中央（つまり股間部）に向かうほど幅方向に収縮し、より下着らしい外観となるとともに、脚の付け根に対するフィット性も良好となる。なお、図２に示す形態では、股間部における内装体１０の固定領域が符号１５Ａにより、また股間部の前後両側における内装体１０の固定領域が符号１５Ｂによりそれぞれ示されている。 In addition, as shown in FIG. 2, when the stretchable region 80 by the elastic film 30 is extended on both the front and rear sides of the crotch portion, the area ratio of the sheet joint portion 40 in the fixing region 15 of the interior body 10 is When the height is increased stepwise (or may be continuous) from the center in the direction toward the waist opening side, in the natural length state, as shown in FIG. In other words, as it goes toward the crotch portion, it shrinks in the width direction, resulting in a more underwear-like appearance and good fit to the base of the leg. In the form shown in FIG. 2, the fixing region of the interior body 10 in the crotch portion is indicated by reference numeral 15 </ b> A, and the fixing region of the interior body 10 on both the front and rear sides of the crotch portion is indicated by reference numeral 15 </ b> B.

　同様に、弾性フィルム３０による伸縮領域８０が股間部の前後両側に延在されている場合、図２に示すように、吸収体１３の形状を、ウエスト開口側から前後方向中央に向かうにつれて幅が段階的（又は連続的でも良い）に狭くなる形状とすると、図２０（ｃ）に示すように、弾性フィルム伸縮構造２０Ｘによる収縮量が前後方向に同一であっても、自然長状態では内装体１０を含む股間部の幅をその前後両側よりも狭い形状とすることができ、より下着らしい外観とすることができる。 Similarly, when the stretchable region 80 by the elastic film 30 extends on both the front and rear sides of the crotch portion, as shown in FIG. 2, the width of the absorber 13 increases from the waist opening side toward the front-rear direction center. If the shape is narrowed stepwise (or may be continuous), as shown in FIG. 20 (c), the inner body is in the natural length state even if the amount of contraction by the elastic film stretchable structure 20X is the same in the front-rear direction. The width of the crotch part including 10 can be made narrower than the front and rear sides thereof, and the appearance can be more like underwear.

　同様に、弾性フィルム３０による伸縮領域８０が股間部の前後両側に延在されている場合、図１２及び図１３に示すように、吸収体１３に、ウエスト開口側から股間部側に向かうにつれて幅が段階的又は連続的に広くなる形状の、周囲よりも目付けが低い低目付部１３ａを形成しても良い。この場合、低目付部１３ａが相対的に低剛性で幅方向に収縮しやすくなる結果、図２０（ｃ）に示すように、弾性フィルム伸縮構造２０Ｘによる収縮量が前後方向に同一であっても、また吸収体１３の幅が前後方向に同一であっても、自然長状態では、内装体１０を含む股間部の幅をその前後両側よりも狭い形状とすることができ、より下着らしい外観とすることができる。低目付部１３ａにおける目付けは適宜定めれば良いが、通常の場合８０～１２０ｇ／ｍ2程度とすることが望ましい。 Similarly, when the stretchable region 80 by the elastic film 30 extends on both the front and back sides of the crotch part, as shown in FIGS. 12 and 13, the absorbent body 13 has a width as it goes from the waist opening side to the crotch part side. Alternatively, the low basis weight 13a having a basis weight that is gradually or continuously widened and lower than the surrounding area may be formed. In this case, as a result of the low basis weight 13a having relatively low rigidity and being easily contracted in the width direction, as shown in FIG. 20 (c), even if the contraction amount by the elastic film expansion / contraction structure 20X is the same in the front-rear direction. In addition, even if the width of the absorbent body 13 is the same in the front-rear direction, in the natural length state, the width of the crotch part including the interior body 10 can be made narrower than both the front and rear sides, and the appearance more like underwear can do. The basis weight of the low basis weight portion 13a may be determined as appropriate, but in the normal case, it is preferably about 80 to 120 g / m 2 .

　また、図示形態のように、弾性フィルム３０による伸縮領域８０が、少なくとも外装体２０における内装体１０の固定領域１５及びその周囲の領域１６にわたり設けられている形態では、内装体１０の固定領域１５におけるシート接合部４０の面積率を、周囲の領域１６におけるシート接合部４０の面積率よりも高くすると、外装体２０における内装体１０の固定領域１５における幅方向の収縮量を、周囲の領域１６の幅方向収縮量よりも低下させることができ、内装体１０が幅方向に収縮することに起因する吸収性や装着感への悪影響を防止することができる。一般に、内装体１０の固定領域１５の周囲の領域１６は、幅方向の収縮量を多くして弾性限界伸びを高くすることが望ましいが、内装体１０の固定領域１５は内装体１０とともに収縮するため、周囲の領域１６と同様に収縮させると、吸収性や装着感に悪影響を及ぼすおそれがある。 Further, as shown in the illustrated embodiment, in the form in which the stretchable region 80 by the elastic film 30 is provided over at least the fixed region 15 of the interior body 10 and the surrounding region 16 in the exterior body 20, the fixed region 15 of the interior body 10. When the area ratio of the sheet bonding portion 40 in the outer region 20 is higher than the area ratio of the sheet bonding portion 40 in the surrounding region 16, the contraction amount in the width direction in the fixing region 15 of the interior body 10 in the exterior body 20 is reduced. The amount of shrinkage in the width direction can be reduced, and adverse effects on the absorptivity and wearing feeling due to the shrinkage of the interior body 10 in the width direction can be prevented. In general, it is desirable that the region 16 around the fixed region 15 of the interior body 10 has a larger amount of contraction in the width direction to increase the elastic limit elongation, but the fixed region 15 of the interior body 10 contracts together with the interior body 10. For this reason, if the contraction is performed in the same manner as the surrounding region 16, there is a possibility that the absorbability and the wearing feeling may be adversely affected.

　シート接合部４０の面積率を変化させるには、図１０（ａ）に示すように単位面積当たりのシート接合部４０の数を変えたり、図１０（ｂ）に示すように個々のシート接合部４０の面積を変えたりすればよい。前者の場合、シート接合部４０の面積を同じとすることも、異なるものとすることもでき、後者の場合、単位面積当たりのシート接合部４０の数を同じとすることも、異なるものとすることもできる。なお、図９（ａ）にはシート接合部４０の面積率を三段階で変化させる場合のパターン例が示されており、図９（ｂ）にはシート接合部４０の面積率を二段階で変化させる場合のパターン例が示されている。 In order to change the area ratio of the sheet bonding portion 40, the number of sheet bonding portions 40 per unit area is changed as shown in FIG. 10 (a), or individual sheet bonding portions as shown in FIG. 10 (b). What is necessary is just to change the area of 40. In the former case, the area of the sheet bonding portion 40 can be the same or different, and in the latter case, the number of the sheet bonding portions 40 per unit area can be the same. You can also. FIG. 9A shows a pattern example when the area ratio of the sheet bonding portion 40 is changed in three stages, and FIG. 9B shows the area ratio of the sheet bonding section 40 in two stages. A pattern example in the case of changing is shown.

　また、各部におけるシート接合部４０の面積率は適宜定めることができるが、通常の場合、内装体の固定領域１５では５～２５％（特に８～１５％）とするのが好ましく、周囲の領域１６では１．８～１９．１％（特に１．８～１０．６％）とするのが好ましい。 Further, the area ratio of the sheet joint portion 40 in each part can be determined as appropriate, but in the normal case, it is preferably 5 to 25% (particularly 8 to 15%) in the fixing region 15 of the interior body. 16 is preferably 1.8 to 19.1% (particularly 1.8 to 10.6%).

　また、各部における弾性限界伸びは適宜定めることができるが、通常の場合、内装体の固定領域１５では１３０～２００％（特に１５０～１８０％）とするのが好ましく、周囲の領域１６では２００％以上（特に２６５～２９５％）とするのが好ましい。 The elastic limit elongation at each part can be determined as appropriate, but in the normal case, it is preferably 130 to 200% (especially 150 to 180%) in the fixing region 15 of the interior body, and 200% in the surrounding region 16. It is preferable to make the above (especially 265 to 295%).

　個々のシート接合部４０及び貫通孔３１の自然長状態での形状は、真円形、楕円形、長方形等の多角形（線状や角丸のものを含む）、星形、雲形等、任意の形状とすることができる。 The shape of each sheet joint 40 and the through-hole 31 in the natural length state may be any shape such as a perfect circle, an ellipse, a polygon such as a rectangle (including a linear or rounded shape), a star, a cloud, etc. It can be a shape.

　個々のシート接合部４０の大きさは、適宜定めれば良いが、大きすぎるとシート接合部４０の硬さが感触に及ぼす影響が大きくなり、小さすぎると接合面積が少なく資材同士が十分に接着できなくなるため、通常の場合、個々のシート接合部４０の面積は０．１４～３．５ｍｍ2（特に０．２５～１．０ｍｍ2）程度とすることが好ましい。個々の貫通孔３１の開口の面積は、貫通孔３１を介してシート接合部が形成されるためシート接合部以上であれば良いが、シート接合部４０の面積の１～１．５倍程度とすることが好ましい。なお、貫通孔３１の開口の面積は、当該伸縮構造２０Ｘが自然長の状態における値を意味し、貫通孔３１の開口の面積が、弾性フィルム３０の表と裏で異なる等、厚み方向に均一でない場合には最小値を意味する。 The size of each sheet bonding portion 40 may be determined as appropriate. However, if the size is too large, the hardness of the sheet bonding portion 40 has an effect on the touch. If the size is too small, the bonding area is small and the materials are sufficiently bonded to each other. In general, the area of each sheet bonding portion 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 greater than the sheet joint portion because the sheet joint portion is formed through the through hole 31, but is about 1 to 1.5 times the area of the sheet joint portion 40. It is preferable to do. In addition, the area of the opening of the through-hole 31 means a value in a state in which the expansion / contraction structure 20X is in a natural length, and the area of the opening of the through-hole 31 is different between the front and back of the elastic film 30, and is uniform in the thickness direction. If not, it means the minimum value.

　シート接合部４０及び貫通孔３１の平面配列は適宜定めることができるが、規則的に繰り返される平面配列が好ましく、図１５（ａ）に示すような斜方格子状や、図１５（ｂ）に示すような六角格子状（これらは千鳥状ともいわれる）、図１５（ｃ）に示すような正方格子状、図１５（ｄ）に示すような矩形格子状、図１５（ｅ）に示すような平行体格子（図示のように、多数の平行な斜め方向の列の群が互いに交差するように２群設けられる形態）状等（これらが伸縮方向に対して９０度未満の角度で傾斜したものを含む）のように規則的に繰り返されるものの他、シート接合部４０の群（群単位の配列は規則的でも不規則でも良く、模様や文字状等でも良い）が規則的に繰り返されるものとすることもできる。シート接合部４０及び貫通孔３１の配列形態は、シート接合部４０の面積率が異なる領域において同じものとする他、異なるものとすることもできる。
　シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合手段は特に限定されない。例えば、シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合はホットメルト接着剤によりなされていても、ヒートシールや超音波シール等の素材溶着による接合手段によりなされていても良い。素材溶着による接合手段を用いる場合、特許文献１記載のように、弾性フィルムの貫通孔を押し出しにより形成し、その貫通孔の位置で第１シート層２０Ａ及び第２シート層２０Ｂを直接に溶着により接合することもできるが、剥離強度が低く、強い力が加わると剥がれるおそれがある。また、特許文献１記載のものは、弾性フィルムの貫通孔を押し出しにより形成するため、図８（ｂ）に示すように、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性フィルム３０が残らず、貫通孔３１の周囲に図示しない押し出し破片が移動可能に残るおそれもある。また、特許文献１記載のものと異なり、図８（ｃ）に示すように、弾性フィルム３０に貫通孔を形成せずに、弾性フィルム３０を介して第１シート層２０Ａ及び第２シート層２０Ｂを接合することも考えられるが、その場合はさらに剥離強度が低いものとなるだけでなく、貫通孔３１を有しないため通気性が極めて低いという問題点もある。 Although the planar arrangement of the sheet joint portion 40 and the through holes 31 can be determined as appropriate, a planar arrangement that is regularly repeated is preferable, and an oblique lattice shape as shown in FIG. Hexagonal lattice shape as shown (these are also called zigzag shapes), square lattice shape as shown in FIG. 15 (c), rectangular lattice shape as shown in FIG. 15 (d), as shown in FIG. 15 (e) Parallel body lattice (as shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other), etc. (these are inclined at an angle of less than 90 degrees with respect to the expansion and contraction direction And a group of sheet joint portions 40 (group unit arrangement may be regular or irregular, and may be a pattern or a letter shape) is regularly repeated. You can also The arrangement | sequence form of the sheet | seat junction part 40 and the through-hole 31 shall be the same in the area | region where the area ratios of the sheet | seat junction part 40 differ, and can also differ.
The joining means of the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40 is not particularly limited. For example, the bonding of the first sheet layer 20A and the second sheet layer 20B in the sheet bonding portion 40 may be performed by a hot melt adhesive, or may be performed by a bonding means such as heat sealing or ultrasonic sealing. . When using 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. Moreover, since the thing of patent document 1 forms the through-hole of an elastic film by extrusion, as shown in FIG.8 (b), the elastic film 30 remains between the 1st sheet layer 20A and the 2nd sheet layer 20B. There is also a possibility that extruded fragments (not shown) remain movably around the through hole 31. Further, unlike the one described in Patent Document 1, as shown in FIG. 8C, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are not formed through the elastic film 30 without forming a through hole in the elastic film 30. However, in this case, there is a problem that not only the peel strength is further lowered but also the air permeability is extremely low because the through hole 31 is not provided.

　よって、素材溶着による接合手段を用いる場合には、図８（ａ）に示すように、シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合が、少なくとも、第１シート層２０Ａ及び第２シート層２０Ｂにわたる弾性フィルム３０の溶融固化物３０ｍによりなされている形態が好ましい。このように弾性フィルム３０の溶融固化物３０ｍを接着剤として第１シート層２０Ａ及び第２シート層２０Ｂを接合すると、剥離強度が高いものとなり、高い通気性と高い剥離強度とを両立できるようになる。 Therefore, when using the joining means by material welding, as shown to Fig.8 (a), joining of the 1st sheet layer 20A and the 2nd sheet layer 20B in the sheet | seat joining part 40 is at least 1st sheet layer 20A. And the form made | formed by 30 m of the melt-solidified material of the elastic film 30 covering the 2nd sheet layer 20B is preferable. In this way, when the first sheet layer 20A and the second sheet layer 20B are joined using the melt-solidified material 30m of the elastic film 30 as an adhesive, the peel strength becomes high, so that both high air permeability and high peel strength can be achieved. Become.

　このような接合構造は、例えば図１８及び図１９に示すように、第１シート層２０Ａと第２シート層２０Ｂとの間に、弾性フィルム３０を伸縮方向と直交する方向にほぼ均等な伸長率で伸縮方向に伸長しつつ挟んだ状態で、所定のシート接合部４０のパターンで溶着することにより、多数箇所で弾性フィルム３０を溶融して貫通孔３１を形成すると同時に、その貫通孔３１の位置で少なくとも弾性フィルム３０の溶融物の固化により第１シート層２０Ａ及び第２シート層２０Ｂを接合する手法を用いて簡素かつ効率的に製造することができる。この手法により製造される弾性フィルム伸縮構造２０Ｘでは、自然長状態では、個々のシート接合部４０の形状・面積と個々の貫通孔３１の形状・面積とがほぼ等しくなる。 For example, as shown in FIGS. 18 and 19, such a joining structure has an elastic film 30 between the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B with an approximately uniform elongation rate in a direction perpendicular to the expansion / contraction direction. At the same time, the elastic film 30 is melted at a number of locations to form the through-holes 31 by welding with a predetermined pattern of the sheet joint portion 40 while being stretched in the expansion / contraction direction. Thus, at least the melt of the elastic film 30 is solidified and can be manufactured simply and efficiently using a method of joining the first sheet layer 20A and the second sheet layer 20B. In the elastic film stretchable structure 20X manufactured by this method, the shape / area of each sheet joint portion 40 and the shape / area of each through hole 31 are substantially equal in the natural length state.

　なお、図１８に示される製造ラインは、おむつ幅方向がＭＤ方向（マシンディレクション、ライン流れ方向）となる横流れ形態となっており、ここで外装体２０が形成され、別のラインで製造された内装体１０が外装体２０に取り付けられた後、前後方向中央で折り畳んで前後の外装体２０の両側部が接合されるとともに、個々のおむつＤＰに分割されるものである。なお、説明を分かりやすくするために、製造過程で連続している部材についても、製造後の部材と同じ名称及び符号を用いている。 The production line shown in FIG. 18 has a transverse flow configuration in which the diaper width direction is the MD direction (machine direction, line flow direction). After the inner body 10 is attached to the outer body 20, it is folded at the center in the front-rear direction to join both side portions of the front and rear outer bodies 20 and to be divided into individual diapers DP. In addition, in order to make the explanation easy to understand, the same names and symbols as those of the members after manufacture are used for the members that are continuous in the manufacturing process.

　より詳細に説明すると、この製造ラインは、外装体組立工程３０１、内装体取付工程３０２、脚開口打ち抜き工程３０３、折り畳み工程３０４、側部接合・切り離し工程３０５を有している。すなわち、外装体組立工程３０１では、図１９に拡大して示すように、所定の幅で帯状に連続する第１シート層２０Ａ及び第２シート層２０Ｂがその連続方向に沿って貼り合わされるようにシール装置６０，６１に供給されるとともに、所定の幅で帯状に連続する弾性フィルム３０がシール装置６０，６１よりも遅い送り速度のニップロール９０を経て、その速度差によりＭＤ方向に伸長された状態で第１シート層２０Ａ及び第２シート層２０Ｂ間に挟むようにしてシール装置６０，６１に供給される。図示形態では、第１シート層２０Ａを前後別々に供給するために一枚のシート材をスリッター６２により二分割しているが、前後別々のシート材を供給しても良く、また第１シート層２０Ａを前後別々とせず、第２シート層２０Ｂと同様に前後一体的なシート材を供給しても良い。また、図示形態では、前後一体的な弾性フィルム３０を供給しているが、第１シート層２０Ａと同様に、弾性フィルム３０を前後別々に供給するために一枚の弾性フィルム３０をスリッターにより二分割したり、前後別々の弾性フィルム３０を供給したりしても良い。 More specifically, this production line includes an exterior body assembly process 301, an interior body mounting process 302, a leg opening punching process 303, a folding process 304, and a side joining / separating process 305. That is, in the exterior body assembly step 301, as shown in an enlarged view in FIG. 19, the first sheet layer 20A and the second sheet layer 20B that are continuous in a band shape with a predetermined width are bonded together in the continuous direction. A state in which the elastic film 30 which is supplied to the sealing devices 60 and 61 and is continuous in a band shape with a predetermined width passes through the nip roll 90 having a lower feeding speed than the sealing devices 60 and 61 and is stretched in the MD direction due to the speed difference. Then, it is supplied to the sealing devices 60 and 61 so as to be sandwiched between the first sheet layer 20A and the second sheet layer 20B. In the illustrated embodiment, one sheet material is divided into two by the slitter 62 in order to supply the first sheet layer 20A separately in the front and rear directions. However, separate sheet materials may be supplied in the front and rear directions. The front and rear integrated sheet materials may be supplied in the same manner as the second sheet layer 20B, without separating the front and rear 20A. In the illustrated embodiment, the elastic film 30 integrated with the front and rear is supplied. However, as with the first sheet layer 20A, in order to supply the elastic film 30 separately with the front and rear, one elastic film 30 is separated by a slitter. You may divide | segment or supply the elastic film 30 before and behind.

　シール装置６０，６１では、前述の伸縮領域８０におけるシート接合部４０のパターンに配列された多数の加圧凸部６０ｐを外周面に備えたシールロール６０と、これに対向配置された表面平滑なアンビルロール６１とにより、第１シート層２０Ａ、ＭＤ方向に伸長した弾性フィルム３０、及び第２シート層２０Ｂを挟み、加圧凸部６０ｐを加熱することにより、加圧凸部６０ｐとアンビルロール６１の外周面との間で厚み方向に加圧される部位のみ、弾性フィルム３０を溶融して貫通孔３１を形成するとともに、その貫通孔３１の位置で第１シート層２０Ａ及び第２シート層２０Ｂを溶着により接合するものである。図示形態のシール装置６０，６１はヒートシール装置を想定したものであるが、超音波シール等の他の装置を用いることもできる。 In the sealing devices 60 and 61, the sealing roll 60 provided on the outer peripheral surface with a large number of pressurizing convex portions 60p arranged in the pattern of the sheet joining portion 40 in the above-described stretchable region 80, and the smooth surface disposed opposite thereto. By sandwiching the first sheet layer 20A, the elastic film 30 extended in the MD direction, and the second sheet layer 20B with the anvil roll 61, the pressure convex portion 60p and the anvil roll 61 are heated by heating the pressure convex portion 60p. The elastic film 30 is melted only at a portion that is pressed in the thickness direction between the outer peripheral surface of the first sheet layer 20A and the second sheet layer 20B at the position of the through hole 31. Are joined by welding. The sealing devices 60 and 61 in the illustrated form are assumed to be heat sealing devices, but other devices such as ultrasonic sealing can also be used.

　シール装置６０，６１で形成された外装体２０に対して、内装体取付工程３０２で、別ラインで製造される内装体１０がＭＤ方向に所定の間隔を空けて供給され、ホットメルト接着剤やヒートシール等の適宜手段により外装体２０に対して接合されることにより、内装組み付け体１０，２０が形成される。次いで、脚開口打ち抜き工程３０３ではカッター装置６３により脚開口が順に形成された後、折り畳み工程３０４において内装組み付け体１０，２０がＣＤ方向（ＭＤ方向と直交する横方向）中央で折り畳まれた後、側部接合・切り離し工程３０５において、個々のおむつＤＰの両側部となる部分で前身頃Ｆの外装体２０及び後身頃Ｂの外装体２０が接合されてサイドシール部２１が形成されるとともに、個々のおむつの境界で外装体２０が切断されて、個々のおむつＤＰが得られる。 In the interior body attaching step 302, the interior body 10 manufactured in a separate line is supplied to the exterior body 20 formed by the sealing devices 60 and 61 at a predetermined interval in the MD direction. The interior assembled bodies 10 and 20 are formed by being joined to the exterior body 20 by appropriate means such as heat sealing. Next, after the leg openings are sequentially formed by the cutter device 63 in the leg opening punching process 303, the interior assembly 10, 20 is folded at the center in the CD direction (lateral direction perpendicular to the MD direction) in the folding process 304, In the side part joining / separating step 305, the outer body 20 of the front body F and the outer body 20 of the rear body B are joined at the portions to be the both side parts of each diaper DP, and the side seal part 21 is formed. The exterior body 20 is cut | disconnected by the boundary of a diaper, and each diaper DP is obtained.

　弾性フィルム３０の融点、並びに第１シート層２０Ａ及び第２シート層２０Ｂの融点、溶着箇所における加工温度の高低の関係は適宜定めることができるが、第１シート層２０Ａ及び第２シート層２０Ｂの融点が弾性フィルム３０の融点以下とされ、溶着箇所において第１シート層２０Ａ及び第２シート層２０Ｂの全体及び弾性フィルム３０の全体が溶融・混合し、シート接合部４０が形成されるよりも、第１シート層２０Ａ及び第２シート層２０Ｂの融点が弾性フィルム３０の融点よりも高く、溶着箇所で弾性フィルム３０が溶融するとともに、第１シート層２０Ａ及び第２シート層２０Ｂの一部又は全部が溶融しない方が好ましい。すなわち、後者の場合、図１６及び図１７からも分かるように、シート接合部４０の周囲から連続する第１シート層２０Ａ及び第２シート層２０Ｂの繊維２０ｆが残っており、第１シート層２０Ａ及び第２シート層２０Ｂにわたり浸透し固化した弾性フィルム３０の溶融固化物３０ｍにより第１シート層２０Ａ及び第２シート層２０Ｂが接合された構造となり、第１シート層２０Ａ及び第２シート層２０Ｂに対する弾性フィルム３０の溶融固化物３０ｍの食い付きが良好となるだけでなく、第１シート層２０Ａ及び第２シート層２０Ｂの強度が低下しにくくなるため、より一層剥離強度に優れたものとなる。なお、第１シート層２０Ａ及び第２シート層２０Ｂの一部が溶融しないことには、シート接合部４０の全繊維について芯（複合繊維における芯だけでなく単成分繊維の中心部分を含む）は残るがその周囲部分（複合繊維における鞘だけでなく単成分繊維の表層側の部分を含む）は溶融する形態や、一部の繊維は全く溶融しないが、残りの繊維は全部が溶融する又は芯は残るがその周囲部分は溶融する形態を含む。 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 not more than the melting point of the elastic film 30, and the entire first sheet layer 20A and the second sheet layer 20B and the entire elastic film 30 are melted and mixed at the welding position, so that the sheet bonding 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. It is preferable not to melt. That is, in the latter case, as can be seen from FIGS. 16 and 17, the fibers 20f of the first sheet layer 20A and the second sheet layer 20B continuous from the periphery of the sheet bonding portion 40 remain, and the first sheet layer 20A. In addition, 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 the first sheet layer 20A and the second sheet layer 20B are bonded to each other. Not only the biting of the melt-solidified material 30m of the elastic film 30 is 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. In addition, a part of the first sheet layer 20A and the second sheet layer 20B is not melted so that the core (including not only the core in the composite fiber but also the center part of the single component fiber) is included in all the fibers of the sheet bonding portion 40. The remaining part (including not only the sheath in the composite fiber but also the part on the surface layer side of the single component fiber) melts, and some fibers are not melted at all, but the remaining fibers are all melted or core Remains but the surrounding part contains a molten form.

　このような観点から、弾性フィルム３０の融点は８０～１４５℃程度のものが好ましく、第１シート層２０Ａ及び第２シート層２０Ｂの融点は８５～１９０℃程度、特に１５０～１９０℃程度のものが好ましく、また、第１シート層２０Ａ及び第２シート層２０Ｂの融点と弾性フィルム３０の融点との差は６０～８０℃程度であるのが好ましい。 From this point of view, 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.

　図示例は、外装体２０のウエスト部以外の伸縮領域８０に弾性フィルム３０を介在させた例であるが、後述する図２１～図２３、及び図３２に示す形態のように、ウエスト部まで弾性フィルム３０を介在させて細長状弾性部材を省略することもできる。また、少なくとも股間部の領域１５Ａに弾性フィルム３０による伸縮領域８０が設けられる限り、他の部分には弾性フィルムを設けずに細長状弾性部材により伸縮性を付加したりすることもできる。 The illustrated example is an example in which the elastic film 30 is interposed in the stretchable region 80 other than the waist portion of the exterior body 20, but it is elastic to the waist portion as shown in FIGS. 21 to 23 and FIG. 32 described later. The elongated elastic member can be omitted with the film 30 interposed. Further, as long as the stretchable region 80 by the elastic film 30 is provided at least in the crotch region 15A, stretchability can be added by an elongated elastic member without providing an elastic film in other portions.

　また、内装体１０の固定領域１５のうち、前後方向の少なくとも股間部の領域１５Ａが弾性フィルム３０による伸縮領域８０とされている限り、他の領域が弾性限界伸びが１３０％以下の非伸縮領域とされていたり、また細長状弾性部材による伸縮領域とされていたりしても良い。 Further, as long as at least the crotch region 15A in the front-rear direction of the fixed region 15 of the interior body 10 is the stretchable region 80 by the elastic film 30, the other regions are non-stretchable regions whose elastic limit elongation is 130% or less. Or may be a stretchable region by an elongated elastic member.

　　＜第２の課題を解決する形態について＞
　次に、図３、図７、図１５、及び図２１～図３８を用いて、第２の課題を解決する形態について説明する。外装体２０は吸収体１３の側縁より側方まで延在されている。この限りで、外装体２０は図示形態のように股間部において外装体２０の側縁が内装体１０の側縁より幅方向中央側に位置していても、また幅方向外側に位置していても良い。また、外装体２０は、サイドシール部２１と対応する前後方向範囲である胴周り領域Ｔと、前身頃Ｆの胴周り領域Ｔ及び後身頃Ｂの胴周り領域Ｔの間の前後方向範囲である中間領域Ｌとを有する。そして、図示形態の外装体２０では、その中間領域Ｌの前後方向中間を除いて、図２２～図２５に示されるように、第１シート層２０Ａ及び第２シート層２０Ｂの間に弾性フィルム３０が積層されるとともに、図３に示されるように、第１シート層２０Ａ及び第２シート層２０Ｂが、間隔を空けて配列された多数のシート接合部４０で弾性フィルム３０を貫通する貫通孔３１を通じて接合された、伸縮方向が幅方向とされた弾性フィルム伸縮構造２０Ｘを有している。第１シート層２０Ａ及び第２シート層２０Ｂは、弾性フィルム３０の貫通孔３１を通じてではなく、弾性フィルム３０を介して間接的に接合されていても良い。外装体２０の平面形状は、中間領域Ｌの幅方向両側縁がそれぞれレッグ開口を形成するように凹状の脚周りライン２９により形成されており、全体として擬似砂時計形状をなしている。外装体２０は、前後に二分割し、両者が股間部で前後方向に離間するように配置しても良い。 <About the form to solve the second problem>
Next, an embodiment for solving the second problem will be described with reference to FIGS. 3, 7, 15, and 21 to 38. FIG. The exterior body 20 extends from the side edge of the absorber 13 to the side. As long as this is the case, the exterior body 20 is located in the crotch portion even if the side edge of the exterior body 20 is located on the center side in the width direction from the side edge of the interior body 10 or on the outer side in the width direction. Also good. The exterior body 20 is a front-rear direction range between a waist region T that is a front-rear direction range corresponding to the side seal portion 21, a waist region T of the front body F, and a waist region T of the rear body B. And an intermediate region L. In the exterior body 20 shown in the figure, the elastic film 30 is interposed between the first sheet layer 20A and the second sheet layer 20B as shown in FIGS. 22 to 25 except for the middle in the front-rear direction of the intermediate region L. 3, and as shown in FIG. 3, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B penetrate through the elastic film 30 through a large number of sheet joint portions 40 arranged at intervals. The elastic film expansion / contraction structure 20X having the expansion / contraction direction set to the width direction is joined. The first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B may be indirectly joined through the elastic film 30 instead of through the through hole 31 of the elastic film 30. The planar shape of the exterior body 20 is formed by concave leg-around lines 29 so that both side edges in the width direction of the intermediate region L form leg openings, respectively, and has a pseudo hourglass shape as a whole. The exterior body 20 may be divided into two parts in the front-rear direction so that both are separated in the front-rear direction at the crotch part.

　図２１及び図２２に示す形態は、弾性フィルム伸縮構造２０Ｘがウエスト端部領域２３まで延在されている形態であるが、ウエスト端部領域２３に弾性フィルム伸縮構造２０Ｘを用いると、ウエスト端部領域２３の締め付けが不十分になる等、必要に応じて、図３３及び図３４に示すようにウエスト端部領域２３には弾性フィルム伸縮構造２０Ｘを設けずに、従来の細長状のウエスト部弾性部材２４による伸縮構造２０Ｘを設けることもできる。ただし、外装体２０における脚開口の縁部分には、脚開口に沿って延びる細長状弾性伸縮部材は設けられない。ウエスト部弾性部材２４は、前後方向に間隔をおいて配置された複数の糸ゴム等の細長状弾性部材であり、身体の胴周りを締め付けるように伸縮力を与えるものである。ウエスト部弾性部材２４は、間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように３～８ｍｍ程度の間隔を空けて、３本以上、好ましくは５本以上配置される。ウエスト部弾性部材２４の固定時の伸長率は適宜定めることができるが、通常の成人用の場合２３０～３２０％程度とすることができる。ウエスト部弾性部材２４は、図示例では糸ゴムを用いたが、例えば平ゴム等、他の細長状の伸縮部材を用いても良い。 The form shown in FIGS. 21 and 22 is a form in which the elastic film stretchable structure 20X extends to the waist end region 23, but when the elastic film stretchable structure 20X is used in the waist end region 23, the waist end portion As shown in FIG. 33 and FIG. 34, the waist end region 23 is not provided with the elastic film expansion / contraction structure 20X as necessary, such as insufficient tightening of the region 23. A telescopic structure 20 </ b> X by the member 24 can also be provided. However, an elongated elastic elastic member extending along the leg opening is not provided at the edge part of the leg opening in the exterior body 20. The waist elastic member 24 is an elongated elastic member such as a plurality of thread rubbers arranged at intervals in the front-rear direction, and gives an elastic 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. For the waist elastic member 24, thread rubber is used in the illustrated example, but other elongated elastic members such as flat rubber may be used.

　他の形態としては、図示しないが、前身頃Ｆの胴周り領域Ｔと後身頃Ｂの胴周り領域Ｔとの間の中間領域Ｌには弾性フィルム伸縮構造２０Ｘを設けない形態としたり、前身頃Ｆの胴周り領域Ｔ内から中間領域Ｌを経て後身頃Ｂの胴周り領域Ｔ内まで前後方向に連続的に伸縮構造２０Ｘを設けたり、前身頃Ｆ及び後身頃Ｂのいずれか一方にのみ弾性フィルム伸縮構造２０Ｘを設けたりすることも可能である。 As other forms, although not shown, an elastic film stretchable structure 20X is not provided in the intermediate region L between the waist region T of the front body F and the waist region T of the back body B, or the front body A stretchable structure 20X is continuously provided in the front-rear direction from the waistline region T of F to the waistline region T of the back body B through the intermediate region L, or only one of the front body F and the back body B is elastic. It is also possible to provide a film stretchable structure 20X.

　個々のシート接合部４０及び貫通孔３１の自然長状態での形状は、適宜定めることができるが、真円形（図３参照）、楕円形、三角形、長方形（図２７～図３０参照）、ひし形（図３１（ｂ）参照）等の多角形、あるいは凸レンズ形（図３１（ａ）参照）、凹レンズ形（図３１（ｃ）参照）、星形、雲形等、任意の形状とすることができる。個々のシート接合部の寸法は特に限定されないが、最大長さは０．５～３．０ｍｍ、特に０．７～１．１ｍｍとするのが好ましく、最大幅４０ｘは０．１～３．０ｍｍ、特に伸縮方向と直交する方向に長い形状の場合には０．１～１．１ｍｍとするのが好ましい。 The shapes of the individual sheet joint portions 40 and the through holes 31 in the natural length state can be determined as appropriate, but are perfectly round (see FIG. 3), elliptical, triangular, rectangular (see FIGS. 27 to 30), rhombus. A polygonal shape such as (see FIG. 31 (b)), a convex lens shape (see FIG. 31 (a)), a concave lens shape (see FIG. 31 (c)), a star shape, a cloud shape, or the like can be used. . The dimensions of the individual sheet joints are not particularly limited, but the maximum length is preferably 0.5 to 3.0 mm, particularly preferably 0.7 to 1.1 mm, and the maximum width 40x is 0.1 to 3.0 mm. In particular, in the case of a shape that is long in the direction orthogonal to the expansion / contraction direction, the thickness is preferably 0.1 to 1.1 mm.

　個々のシート接合部４０の大きさは、適宜定めれば良いが、大きすぎるとシート接合部４０の硬さが感触に及ぼす影響が大きくなり、小さすぎると接合面積が少なく資材同士が十分に接着できなくなるため、通常の場合、個々のシート接合部４０の面積は０．１４～３．５ｍｍ2程度とすることが好ましい。個々の貫通孔３１の開口の面積は、貫通孔３１を介してシート接合部が形成されるためシート接合部以上であれば良いが、シート接合部の面積の１～１．５倍程度とすることが好ましい。なお、貫通孔３１の開口の面積は、弾性フィルム３０単独の状態ではなく第１シート層２０Ａ及び第２シート層２０Ｂと一体化した状態で、かつ自然長の状態における値を意味し、貫通孔３１の開口の面積が、弾性フィルム３０の表と裏で異なる等、厚み方向に均一でない場合には最小値を意味する。 The size of each sheet bonding portion 40 may be determined as appropriate. However, if the size is too large, the hardness of the sheet bonding portion 40 has an effect on the touch. If the size is too small, the bonding area is small and the materials are sufficiently bonded to each other. In general, the area of each sheet joint portion 40 is preferably about 0.14 to 3.5 mm 2 because it cannot be performed. The area of the opening of each through hole 31 may be equal to or larger than the sheet joint portion because the sheet joint portion is formed through the through hole 31, but is about 1 to 1.5 times the area of the sheet joint portion. It is preferable. In addition, the area of the opening of the through-hole 31 means a value in a state of being integrated with the first sheet layer 20A and the second sheet layer 20B, not in the state of the elastic film 30 alone, and in a natural length state. When the area of the opening 31 is not uniform in the thickness direction, such as when the elastic film 30 is different from the front and back, it means the minimum value.

　シート接合部４０及び貫通孔３１の平面配列は前述のとおりであり、適宜定めることができるが、規則的に繰り返される平面配列が好ましく、図１５（ａ）に示すような斜方格子状や、図１５（ｂ）に示すような六角格子状（これらは千鳥状ともいわれる）、図１５（ｃ）に示すような正方格子状、図１５（ｄ）に示すような矩形格子状、図１５（ｅ）に示すような平行体格子（図示のように、多数の平行な斜め方向の列の群が互いに交差するように２群設けられる形態）状等（これらが伸縮方向に対して９０度未満の角度で傾斜したものを含む）のように規則的に繰り返されるものの他、シート接合部４０の群（群単位の配列は規則的でも不規則でも良く、模様や文字状等でも良い）が規則的に繰り返されるものとすることもできる。 The planar arrangement of the sheet joint portion 40 and the through holes 31 is as described above, and can be determined as appropriate. A planar arrangement that is regularly repeated is preferable, and an oblique lattice shape as shown in FIG. Hexagonal lattice shape as shown in FIG. 15B (these are also called zigzag shapes), square lattice shape as shown in FIG. 15C, rectangular lattice shape as shown in FIG. e) parallel lattice as shown in the figure (a form in which two groups of parallel diagonal rows intersect each other as shown in the figure), etc. (they are less than 90 degrees with respect to the stretching direction) In addition to those that are regularly repeated (including those inclined at an angle of), the group of sheet joints 40 (group unit arrangement may be regular or irregular, and may be a pattern, a character, etc.) It can also be repeated.

　シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合は、弾性フィルム３０に形成された貫通孔３１を通じて接合される。この場合、少なくともシート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂ間以外では弾性フィルム３０と接合されていないことが望ましい。 The bonding of the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B in the sheet bonding portion 40 is performed through the through hole 31 formed in the elastic film 30. In this case, it is desirable that the elastic film 30 is not bonded at least except between the first sheet layer 20A and the second sheet layer 20B in the sheet bonding portion 40.

　シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合手段は特に限定されない。例えば、接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合はホットメルト接着剤によりなされていても、ヒートシールや超音波シール等の素材溶着による接合手段によりなされていても良い。 The joining means of the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40 is not particularly limited. For example, 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.

　シート接合部４０において第１シート層２０Ａ及び第２シート層２０Ｂが貫通孔３１を通じて接合される場合、シート接合部４０が素材溶着により形成される形態は、シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方の大部分又は一部の溶融固化物２０ｍのみにより第１シート層２０Ａ及び第２シート層２０Ｂが接合される第１溶着形態（図３５（ａ）参照）、シート接合部４０における弾性フィルム３０の全部若しくは大部分又は一部の溶融固化物３０ｍのみにより第１シート層２０Ａ及び第２シート層２０Ｂが接合される第２溶着形態（図３５（ｂ）参照）、及びこれらの両者が組み合わさった第３溶着形態（図３５（ｃ）参照）のいずれでも良いが、第２、第３溶着形態が好ましい。特に好ましいのは、第１シート層２０Ａ及び第２シート層２０Ｂの一部の溶融固化物２０ｍと、シート接合部４０における弾性フィルム３０の全部若しくは大部分の溶融固化物３０ｍとにより第１シート層２０Ａ及び第２シート層２０Ｂが接合される形態である。なお、図３７（ｂ）に示される第３溶着形態では、黒色に写っている第１シート層２０Ａ又は第２シート層２０Ｂの繊維溶融固化物２０ｍ間に、白色に写っている弾性フィルム３０の溶融固化物３０ｍが見られるのに対して、図３７（ａ）に示される第１溶着形態では、第１シート層２０Ａ又は第２シート層２０Ｂの繊維溶融固化物２０ｍ間に弾性フィルムの溶融固化物は見られない（白色部分は繊維溶融固化物２０ｍの境界と、繊維溶融固化物２０ｍの乱反射である）。 When the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are bonded through the through hole 31 in the sheet bonding portion 40, the form in which the sheet bonding portion 40 is formed by material welding is the first sheet layer 20 </ b> A in the sheet bonding portion 40. And a first welding mode in which the first sheet layer 20A and the second sheet layer 20B are joined only by most or part of the molten solidified material 20m of at least one of the second sheet layer 20B (see FIG. 35A), A second welding mode in which the first sheet layer 20A and the second sheet layer 20B are joined by all or most of the elastic film 30 in the sheet joining portion 40 or only a part of the melt-solidified material 30m (see FIG. 35B). , And a third welding mode (see FIG. 35 (c)) in which both of these are combined, but the second and third welding modes are preferable. Particularly preferably, the first sheet layer is composed of a part of the melt-solidified material 20m of the first sheet layer 20A and the second sheet layer 20B and the whole or most of the melt-solidified material 30m of the elastic film 30 in the sheet joint portion 40. 20A and the second sheet layer 20B are joined together. In the third welding mode shown in FIG. 37 (b), the elastic film 30 shown in white is between the fiber melt-solidified materials 20m of the first sheet layer 20A or the second sheet layer 20B shown in black. While the melt-solidified material 30m is seen, in the first welding form shown in FIG. 37 (a), the elastic film is melt-solidified between the fiber melt-solidified materials 20m of the first sheet layer 20A or the second sheet layer 20B. No object is seen (the white part is the boundary of the fiber melt-solidified product 20m and the irregular reflection of the fiber melt-solidified product 20m).

　第１接着形態や第３接着形態のように、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方の大部分又は一部の溶融固化物２０ｍを接着剤として第１シート層２０Ａ及び第２シート層２０Ｂを接合する場合、第１シート層２０Ａ及び第２シート層２０Ｂの一部は溶融しない方がシート接合部４０が硬質化しないため好ましい。なお、第１シート層２０Ａ及び第２シート層２０Ｂが不織布であるときには、第１シート層２０Ａ及び第２シート層２０Ｂの一部が溶融しないことには、シート接合部４０の全繊維について芯（複合繊維における芯だけでなく単成分繊維の中心部分を含む）は残るがその周囲部分（複合繊維における鞘だけでなく単成分繊維の表層側の部分を含む）は溶融する形態や、一部の繊維は全く溶融しないが、残りの繊維は全部が溶融する又は芯は残るがその周囲部分は溶融する形態を含む。 As in the first adhesive form and the third adhesive form, the first sheet layer 20A and the second sheet 20A and the second sheet 20A and the second sheet layer 20B are used by using at least one of the first sheet layer 20A and the second sheet layer 20B as the adhesive. When joining the sheet layer 20B, it is preferable not to melt part of the first sheet layer 20A and the second sheet layer 20B because the sheet joining part 40 does not harden. Note that when the first sheet layer 20A and the second sheet layer 20B are non-woven fabrics, a part of the first sheet layer 20A and the second sheet layer 20B does not melt. The composite fiber contains not only the core but also the central part of the single component fiber), but the surrounding part (including not only the sheath but also the surface part of the single component fiber of the composite fiber) melts, The fibers do not melt at all, but the remaining fibers either completely melt or the core remains but the surrounding portion includes a molten form.

　第２溶着形態及び第３溶着形態のように、弾性フィルム３０の溶融固化物３０ｍを接着剤として第１シート層２０Ａ及び第２シート層２０Ｂを接合すると、剥離強度が高いものとなる。第２溶着形態では、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方の融点が弾性フィルム３０の融点及びシート接合部４０形成時の加熱温度よりも高い条件下で、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性フィルム３０を挟み、シート接合部４０となる部位を加圧・加熱し、弾性フィルム３０のみを溶融することにより製造することができる。一方、第３溶着形態では、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方の融点が弾性フィルム３０の融点よりも高い条件下で、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性フィルム３０を挟み、シート接合部４０となる部位を加圧・加熱し、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方と弾性フィルム３０とを溶融することにより製造することができる。このような観点から、弾性フィルム３０の融点は８０～１４５℃程度のものが好ましく、第１シート層２０Ａ及び第２シート層２０Ｂの融点は８５～１９０℃程度、特に１５０～１９０℃程度のものが好ましく、第１シート層２０Ａ及び第２シート層２０Ｂの融点と弾性フィルム３０の融点との差は６０～９０℃程度であるのが好ましい。また、加熱温度は１００～１５０℃程度とするのが好ましい。 When the first sheet layer 20A and the second sheet layer 20B are joined using the melted and solidified material 30m of the elastic film 30 as an adhesive as in the second welding form and the third welding form, the peel strength becomes high. In the second welding mode, the first sheet layer 20A and the second sheet layer 20B have a melting point that is higher than the melting point of the elastic film 30 and the heating temperature when forming the sheet joint 40. In addition, the elastic film 30 is sandwiched between the second sheet layers 20 </ b> B, the portion to be the sheet bonding portion 40 is pressurized and heated, and only the elastic film 30 is melted. On the other hand, in the third welding mode, the first sheet layer 20A and the second sheet layer 20B are between the first sheet layer 20A and the second sheet layer 20B under the condition that the melting point of at least one of the first sheet layer 20A and the second sheet layer 20B is higher than the melting point of the elastic film 30. It can be manufactured by sandwiching the elastic film 30, pressurizing and heating a portion to be the sheet bonding portion 40, and melting at least one of the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B and the elastic film 30. From this point of view, 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 90 ° C. The heating temperature is preferably about 100 to 150 ° C.

　第２溶着形態及び第３溶着形態では、第１シート層２０Ａ及び第２シート層２０Ｂが不織布であるときには、弾性フィルム３０の溶融固化物３０ｍは、図３６（ｃ）に示すようにシート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの厚み方向全体にわたり繊維間に浸透していても良いが、図３５（ｂ）（ｃ）及び図３６（ａ）に示すように厚み方向中間まで繊維間に浸透する形態、又は図３６（ｂ）に示すように第１シート層２０Ａ及び第２シート層２０Ｂの繊維間にほとんど浸透しない形態の方が、シート接合部４０の柔軟性が高いものとなる。 In the second welding mode and the third welding mode, when the first sheet layer 20A and the second sheet layer 20B are non-woven fabrics, the melt-solidified product 30m of the elastic film 30 is a sheet joint portion as shown in FIG. 40 may penetrate between the fibers in the entire thickness direction of the first sheet layer 20A and the second sheet layer 20B, but as shown in FIGS. 35 (b) (c) and 36 (a), it is intermediate in the thickness direction. The form that penetrates between the fibers up to or the form that hardly penetrates between the fibers of the first sheet layer 20A and the second sheet layer 20B as shown in FIG. It will be a thing.

　図３８は、第２溶着形態及び第３溶着形態を形成するのに好適な超音波シール装置の例を示している。この超音波シール装置では、シート接合部４０の形成に際して、外面にシート接合部４０のパターンで形成した突起部６０ａを有するアンビルロール６０と超音波ホーン６１との間に、第１シート層２０Ａ、弾性フィルム３０及び第２シート層２０Ｂを送り込む。この際、例えば上流側の弾性フィルム３０の送り込み駆動ロール６３及びニップロール６２による送り込み移送速度を、アンビルロール６０及び超音波ホーン６１以降の移送速度よりも遅くすることにより、送り込み駆動ロール６３及びニップロール６２によるニップ位置からアンビルロール６０及び超音波ホーン６１によるシール位置までの経路で、弾性フィルム３０をＭＤ方向（マシン方向、流れ方向）に所定の伸長率まで伸長する。この弾性フィルム３０の伸長率は、アンビルロール６０及び送り込み駆動ロール６３の速度差を選択することにより設定することができ、例えば３００％～５００％程度とすることができる。６２はニップロールである。アンビルロール６０と超音波ホーン６１との間に送り込まれた、第１シート層２０Ａ、弾性フィルム３０及び第２シート層２０Ｂは、この順に積層した状態で、突起部６０ａと超音波ホーン６１との間で加圧しつつ、超音波ホーン６１の超音波振動エネルギーにより加熱し、弾性フィルム３０のみを溶融するか、又は第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方と弾性フィルム３０とを溶融することによって、弾性フィルム３０に貫通孔３１を形成するのと同時に、その貫通孔３１を通じて第１シート層２０Ａ及び第２シート層２０Ｂを接合する。したがって、この場合にはアンビルロール６０の突起部６０ａの大きさ、形状、離間間隔、ロール長方向及びロール周方向の配置パターンなどを選定することにより、シート接合部４０の面積率を選択することができる。 FIG. 38 shows an example of an ultrasonic sealing device suitable for forming the second welding form and the third welding form. In this ultrasonic sealing apparatus, when the sheet bonding portion 40 is formed, the first sheet layer 20A, between the anvil roll 60 and the ultrasonic horn 61, each having a projection 60a formed in the pattern of the sheet bonding portion 40 on the outer surface, The elastic film 30 and the second sheet layer 20B are fed. At this time, for example, the feeding driving speed of the upstream elastic film 30 by the feeding driving roll 63 and the nip roll 62 is made slower than the feeding speed after the anvil roll 60 and the ultrasonic horn 61, thereby the feeding driving roll 63 and the nip roll 62. The elastic film 30 is stretched in the MD direction (machine direction, flow direction) to a predetermined stretch rate through the path from the nip position due to the above to the seal position due to the anvil roll 60 and the ultrasonic horn 61. The stretch rate of the elastic film 30 can be set by selecting the speed difference between the anvil roll 60 and the feed drive roll 63, and can be set to about 300% to 500%, for example. 62 is a nip roll. The first sheet layer 20 </ b> A, the elastic film 30, and the second sheet layer 20 </ b> B fed between the anvil roll 60 and the ultrasonic horn 61 are stacked in this order, and the protrusion 60 a and the ultrasonic horn 61 are While being pressurized, the ultrasonic horn 61 is heated by ultrasonic vibration energy to melt only the elastic film 30 or at least one of the first sheet layer 20A and the second sheet layer 20B and the elastic film 30 are melted. By doing so, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined through the through-hole 31 at the same time as the through-hole 31 is formed in the elastic film 30. Therefore, in this case, by selecting the size, shape, separation interval, arrangement pattern in the roll length direction and roll circumferential direction, etc., of the projections 60a of the anvil roll 60, the area ratio of the sheet joining portion 40 is selected. Can do.

　貫通孔３１が形成される理由は必ずしも明確ではないが、弾性フィルム３０におけるアンビルロール６０の突起部６０ａと対応する部分が溶融して周囲から離脱することにより開孔するものと考えられる。この際、弾性フィルム３０における、伸縮方向に並ぶ隣接貫通孔３１の間の部分は、図３（ａ）、図２７（ａ）及び図２９（ａ）に示すように、貫通孔３１により伸縮方向両側の部分から切断され、収縮方向両側の支えを失うことになるため、収縮方向と直交する方向の連続性を保ちうる範囲で、伸縮方向と直交する方向の中央側ほど伸縮方向中央側に釣り合うまで収縮し、貫通孔３１が伸縮方向に拡大する。そして、後述する伸縮領域８０のように弾性フィルム３０が伸縮方向に沿って直線的に連続する部分が残るパターンでシート接合部４０を形成すると、図３（ａ）及び図２７（ａ）に示すように、個別の製品に切断すること等により自然長状態まで収縮するときに、貫通孔３１の拡大部分の伸縮方向の長さは、貫通孔３１とシート接合部４０との間に隙間ができなくなるまで収縮することとなる。一方、後述する非伸縮領域７０のように弾性フィルム３０が伸縮方向に沿って直線的に連続する部分がないパターンでシート接合部４０を形成すると、図２９（ａ）に示すように、個別の製品に切断すること等により自然長状態まで収縮するときにほとんど収縮しないため、貫通孔３１とシート接合部４０との間に隙間が大きく残されることとなる。 The reason why the through-hole 31 is formed is not necessarily clear, but it is considered that the hole corresponding to the protrusion 60a of the anvil roll 60 in the elastic film 30 is melted and separated from the surroundings. At this time, the portion of the elastic film 30 between the adjacent through holes 31 aligned in the expansion / contraction direction is expanded and contracted by the through holes 31 as shown in FIGS. 3 (a), 27 (a), and 29 (a). Since it is cut from both sides and loses the support on both sides in the contraction direction, the central side in the direction orthogonal to the expansion / contraction direction is balanced with the central side in the expansion / contraction direction within a range that can maintain continuity in the direction orthogonal to the contraction direction. The through hole 31 expands in the expansion / contraction direction. And when the sheet | seat junction part 40 is formed in the pattern in which the part which the elastic film 30 continues linearly along an expansion-contraction direction like the expansion-contraction area | region 80 mentioned later is shown to Fig.3 (a) and FIG.27 (a). Thus, when contracting to a natural length state by cutting into individual products, the length in the expansion / contraction direction of the enlarged portion of the through hole 31 creates a gap between the through hole 31 and the sheet joining portion 40. It will shrink until it runs out. On the other hand, when the sheet bonding portion 40 is formed in a pattern in which the elastic film 30 does not have a linearly continuous portion along the stretching direction as in a non-stretchable region 70 described later, as shown in FIG. Since it hardly shrinks when it is shrunk to a natural length state by cutting into a product or the like, a large gap is left between the through hole 31 and the sheet bonding portion 40.

　第１シート層２０Ａ及び第２シート層２０Ｂの構成材は、シート状のものであれば特に限定無く使用できるが、通気性及び柔軟性の観点から不織布を用いることが好ましい。不織布は、その原料繊維が何であるかは特に限定されない。例えば、ポリエチレンやポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維、レーヨンやキュプラ等の再生繊維、綿等の天然繊維などや、これらから二種以上が使用された混合繊維、複合繊維などを例示することができる。さらに、不織布は、どのような加工によって製造されたものであってもよい。加工方法としては、公知の方法、例えば、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法、エアスルー法、ポイントボンド法等を例示することができる。不織布を用いる場合、その目付けは１２～２０ｇ／ｍ2程度とするのが好ましい。また、第１シート層２０Ａ及び第２シート層２０Ｂの一部又は全部は、一枚の資材を折り返して対向させた一対の層であっても良い。例えば、図示形態のように、ウエスト端部領域２３では、外側に位置する構成材を第２シート層２０Ｂとし、かつそのウエスト開口縁で内面側に折り返してなる折り返し部分２０Ｃを第１シート層２０Ａとして、その間に弾性フィルム３０を介在させるとともに、それ以外の部分では内側に位置する構成材を第１シート層２０Ａとし、外側に位置する構成材を第２シート層２０Ｂとして、その間に弾性フィルム３０を介在させることができる。もちろん、前後方向の全体にわたり第１シート層２０Ａの構成材及び第２シート層２０Ｂの構成材を個別に設け、構成材を折り返しすることなく、第１シート層２０Ａの構成材及び第２シート層２０Ｂの構成材間に弾性フィルム３０を介在させることもできる。 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. For example, 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. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method 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. When using a nonwoven fabric, the basis weight is preferably about 12 to 20 g / m 2 . Moreover, a part or all of the first sheet layer 20A and the second sheet layer 20B may be a pair of layers in which one material is folded and faced. For example, as shown in the figure, in the waist end region 23, the constituent material located outside is the second sheet layer 20B, and the folded portion 20C that is folded back to the inner surface side at the waist opening edge is the first sheet layer 20A. In addition, the elastic film 30 is interposed therebetween, and in the other portions, the constituent material positioned inside is the first sheet layer 20A, and the constituent material positioned outside is the second sheet layer 20B, and the elastic film 30 is interposed therebetween. Can be interposed. Of course, the constituent material of the first sheet layer 20A and the constituent material of the second sheet layer 20B are individually provided over the entire front-rear direction, and the constituent material of the first sheet layer 20A and the second sheet layer are not folded back. The elastic film 30 can also be interposed between the constituent materials of 20B.

　弾性フィルム３０は特に限定されるものではなく、それ自体弾性を有する熱可塑性樹脂フィルムであれば、無孔のものの他、通気のために多数の孔やスリットが形成されたものも用いることができる。特に、幅方向（伸縮方向、ＭＤ方向）における引張強度が８～２５Ｎ／３５ｍｍ、前後方向（伸縮方向と直交する方向、ＣＤ方向）における引張強度が５～２０Ｎ／３５ｍｍ、幅方向における引張伸度が４５０～１０５０％、及び前後方向における引張伸度が４５０～１４００％の弾性フィルム３０であると好ましい。弾性フィルム３０の厚みは特に限定されないが、２０～４０μｍ程度であるのが好ましい。 The elastic film 30 is not particularly limited, and as long as it is a thermoplastic resin film having elasticity per se, a film having a large number of holes and slits for ventilation can also be used. . In particular, the tensile strength in the width direction (stretching direction, MD direction) is 8 to 25 N / 35 mm, the tensile strength in the front-rear direction (direction perpendicular to the stretching direction, CD direction) is 5 to 20 N / 35 mm, and the tensile elongation in the width direction. The elastic film 30 is preferably 450 to 1050% and the tensile elongation in the front-rear direction is 450 to 1400%. The thickness of the elastic film 30 is not particularly limited, but is preferably about 20 to 40 μm.

　（伸縮領域）
　外装体２０における弾性フィルム伸縮構造２０Ｘを有する領域は、幅方向に伸縮可能な伸縮領域を有している。伸縮領域８０では、弾性フィルム３０が幅方向に沿って直線的に連続する部分３２を有しており、かつ弾性フィルム３０の収縮力により幅方向に収縮しているとともに、幅方向に伸長可能となっている。より具体的には、弾性フィルム３０を幅方向に伸長した状態で、幅方向及びこれと直交する前後方向（伸縮方向と直交する方向）にそれぞれ間隔を空けて、弾性フィルム３０の貫通孔３１を介して第１シート層２０Ａ及び第２シート層２０Ｂを接合し、多数のシート接合部４０を形成することにより、弾性フィルム伸縮構造２０Ｘを形成するとともに、伸縮領域８０では弾性フィルム３０が幅方向に沿って直線的に連続する部分を有するように貫通孔３１を配置することによって、このような伸縮性を付与することができる。 (Elastic area)
The area | region which has the elastic film expansion-contraction structure 20X in the exterior body 20 has an expansion-contraction area | region which can be expanded-contracted in the width direction. In the stretchable region 80, the elastic film 30 has a portion 32 linearly continuous along the width direction, and is contracted in the width direction by the contraction force of the elastic film 30, and can be expanded in the width direction. It has become. More specifically, in a state where the elastic film 30 is extended in the width direction, the through-holes 31 of the elastic film 30 are formed at intervals in the width direction and in the front-rear direction (direction orthogonal to the expansion / contraction direction) orthogonal thereto. The first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined to each other to form a large number of sheet joint portions 40, thereby forming the elastic film stretchable structure 20 </ b> X. In the stretchable region 80, the elastic film 30 extends in the width direction. Such stretchability can be imparted by arranging the through holes 31 so as to have linearly continuous portions.

　伸縮領域８０では、自然長状態では、図３（ｄ）及び図２７（ｄ）に示すように、シート接合部４０間の第１シート層２０Ａ及び第２シート層２０Ｂが互いに離間する方向に膨らんで、前後方向に延びる収縮皺２５が形成され、図３（ｃ）及び図２７（ｃ）に示すように、幅方向にある程度伸長した装着状態でも、収縮皺２５は伸ばされるものの、残るようになっている。また、図示形態のように、第１シート層２０Ａ及び第２シート層２０Ｂは、少なくともシート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂ間以外では弾性フィルム３０と接合されていないと、装着状態を想定した図３（ｃ）及び図２７（ｄ）及び第１シート層２０Ａ及び第２シート層２０Ｂの展開状態を想定した図３（ａ）（ｂ）及び図２７（ａ）（ｂ）からも分かるように、これらの状態では、弾性フィルム３０における貫通孔３１と、シート接合部４０との間に隙間が形成され、弾性フィルム３０の素材が無孔のフィルムやシートであっても、この隙間により通気性が付加される。また、図３（ｄ）及び図２７（ｄ）に示す自然長状態では、弾性フィルム３０の収縮により貫通孔３１がすぼまり、貫通孔３１とシート接合部４０との間に隙間がほとんど形成されない。なお、装着状態及び自然長状態の収縮皺２５の状態は、図２６及び図２８のサンプル写真にも現れている。 In the stretchable region 80, in the natural length state, as shown in FIGS. 3D and 27D, the first sheet layer 20A and the second sheet layer 20B between the sheet joining portions 40 swell in a direction away from each other. Thus, as shown in FIGS. 3 (c) and 27 (c), the contraction ridge 25 extending in the front-rear direction is formed. It has become. Further, as illustrated, 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 sheet joining portion 40. 3 (c) and 27 (d) assuming the mounted state, and FIGS. 3 (a) (b) and 27 (a) (a) assuming the unfolded state of the first sheet layer 20A and the second sheet layer 20B. As can be seen from b), in these states, a gap is formed between the through hole 31 in the elastic film 30 and the sheet joint portion 40, and the material of the elastic film 30 is a non-porous film or sheet. However, air permeability is added by this gap. Further, in the natural length state shown in FIG. 3D and FIG. 27D, the through hole 31 is squeezed due to the contraction of the elastic film 30, and a gap is almost formed between the through hole 31 and the sheet joining portion 40. Not. In addition, the state of the shrinkage wrinkle 25 in the mounted state and the natural length state also appears in the sample photographs of FIGS.

　伸縮領域８０の幅方向の弾性限界伸びは２００％以上（好ましくは２６５～２９５％）とすることが望ましい。伸縮領域８０の弾性限界伸びは、製造時の弾性フィルム３０の伸長率によってほぼ決まるがこれを基本として、幅方向の収縮を阻害する要因により低下する。このような阻害要因の主なものは、幅方向において単位長さ当たりに占めるシート接合部４０の長さ４０ｘの割合であり、この割合が大きくなるほど弾性限界伸びが低下する。通常の場合、シート接合部４０の長さ４０ｘはシート接合部４０の面積率と相関があるため、伸縮領域８０の弾性限界伸びはシート接合部４０の面積率により調整できる。 The elastic limit elongation in the width direction of the stretchable region 80 is desirably 200% or more (preferably 265 to 295%). The elastic limit elongation of the stretchable region 80 is substantially determined by the stretch rate of the elastic film 30 at the time of manufacture, but based on this, it is lowered by a factor that inhibits shrinkage in the width direction. The main factor of such inhibition is the ratio of the length 40x of the sheet joint portion 40 per unit length in the width direction, and the elastic limit elongation decreases as the ratio increases. In a normal case, the length 40x of the sheet bonding portion 40 has a correlation with the area ratio of the sheet bonding portion 40, so that the elastic limit elongation of the stretchable region 80 can be adjusted by the area ratio of the sheet bonding portion 40.

　伸縮領域８０の伸長応力は、主に弾性フィルム３０が幅方向に沿って直線的に連続する部分３２の幅３２ｗの総和により調整することができる。弾性フィルム３０が幅方向に沿って直線的に連続する部分３２の幅３２ｗは、当該連続する部分３２の両側縁に接する貫通孔３１の、前後方向の間隔３１ｄに等しく、当該貫通孔３１の間隔３１ｄは、前後方向における貫通孔３１の長さ３１ｙと、前後方向におけるシート接合部４０の長さ４０ｙとが等しいとき（前述の貫通孔３１及びシート接合部４０の同時形成手法を採用する場合等）には、当該連続する部分の両側縁に接するシート接合部４０の、前後方向の間隔４０ｄに等しい。よって、この場合には、前後方向において単位長さ当たりに占めるシート接合部４０の長さ４０ｙの割合により、伸縮領域８０の伸長応力を調整することができ、通常の場合、シート接合部４０の長さ４０ｙはシート接合部４０の面積率と相関があるため、伸縮領域８０の伸長応力はシート接合部４０の長さはシート接合部４０の面積率により調整できる。伸縮領域８０の伸長応力は、弾性限界の５０％まで伸長したときの伸長応力を目安とすることができる。 The elongation stress of the stretchable region 80 can be adjusted mainly by the sum of the widths 32w of the portions 32 where the elastic film 30 continues linearly along the width direction. The width 32w of the portion 32 in which the elastic film 30 is linearly continuous along the width direction is equal to the interval 31d in the front-rear direction of the through-holes 31 in contact with both side edges of the continuous portion 32. 31d is when the length 31y of the through-hole 31 in the front-rear direction is equal to the length 40y of the sheet-joint portion 40 in the front-rear direction (when the above-described simultaneous formation method of the through-hole 31 and the sheet joint 40 is employed, etc.) ) Is equal to the interval 40d in the front-rear direction of the sheet joining portion 40 in contact with both side edges of the continuous portion. Therefore, in this case, the extension stress of the stretchable region 80 can be adjusted by the ratio of the length 40y of the sheet joint portion 40 per unit length in the front-rear direction. Since the length 40y has a correlation with the area ratio of the sheet bonding portion 40, the elongation stress of the stretchable region 80 can be adjusted by adjusting the length of the sheet bonding portion 40 by the area ratio of the sheet bonding portion 40. The elongation stress of the expansion / contraction region 80 can be determined based on the elongation stress when it is expanded to 50% of the elastic limit.

　伸縮領域８０におけるシート接合部４０の面積率及び個々のシート接合部４０の面積は適宜定めることができるが、通常の場合、次の範囲内とするのが好ましい。
　シート接合部４０の面積：０．１４～３．５ｍｍ2（特に０．１４～１．０ｍｍ2）
　シート接合部４０の面積率：１．８～１９．１％（特に１．８～１０．６％） The area ratio of the sheet bonding portion 40 and the area of each sheet bonding portion 40 in the stretchable region 80 can be determined as appropriate, but in the normal case, it is preferably within the following range.
Area of sheet joint 40: 0.14 to 3.5 mm 2 (particularly 0.14 to 1.0 mm 2 )
Area ratio of sheet joint 40: 1.8 to 19.1% (especially 1.8 to 10.6%)

　このように、伸縮領域８０の弾性限界伸び及び伸長応力はシート接合部４０の面積により調整できるため、図３３に示すように、伸縮領域８０内にシート接合部４０の面積率が異なる複数の領域を設け、部位に応じてフィット性を変化させることができる。図３３に示す形態では、前身頃Ｆにおける脚の付け根に沿って斜め方向に延びる領域８１、及び脚開口の縁部領域８２は、それ以外の領域と比べてシート接合部４０の面積率が高く、従って伸長応力が弱く、柔軟に伸縮する領域となっている。また、後身頃Ｂにおける腸骨対向領域８３、及び脚開口の縁部領域８２も、それ以外の領域と比べてシート接合部４０の面積率が高く、したがって伸長応力が弱く、柔軟に伸縮する領域となっている。 As described above, since the elastic limit elongation and elongation stress of the stretchable region 80 can be adjusted by the area of the sheet joint portion 40, a plurality of regions having different area ratios of the sheet joint portion 40 in the stretchable region 80 as shown in FIG. The fitting property can be changed according to the part. In the form shown in FIG. 33, the area 81 extending in the oblique direction along the base of the leg in the front body F and the edge area 82 of the leg opening have a higher area ratio of the sheet joint portion 40 than the other areas. Therefore, the extensional stress is weak and the region expands and contracts flexibly. In addition, the iliac facing region 83 and the edge region 82 of the leg opening in the back body B also have a higher area ratio of the sheet joint portion 40 than the other regions, and therefore the extension stress is weak and the region expands and contracts flexibly. It has become.

　（非伸縮領域）
　外装体２０における弾性フィルム伸縮構造２０Ｘを有する領域には、図３３に示すように、伸縮領域８０の少なくとも幅方向一方側に非伸縮領域７０を設けることができる。伸縮領域８０及び非伸縮領域７０の配置は適宜定めることができる。本実施形態のようなパンツタイプ使い捨ておむつの外装体２０の場合、吸収体１３と重なる部分は伸縮が不要な領域であるため、図示形態のように、吸収体１３と重なる部分の一部又は全部（内外固定領域１０Ｂのほぼ全体を含むことが望ましい）を非伸縮領域７０とするのは好ましい。もちろん、吸収体１３と重なる領域からその幅方向又は前後方向に位置する吸収体１３と重ならない領域にかけて非伸縮領域７０を設けることもでき、吸収体１３と重ならない領域にのみ非伸縮領域７０を設けることもできる。 (Non-stretchable area)
As shown in FIG. 33, a non-stretchable region 70 can be provided at least on one side in the width direction of the stretchable region 80 in the region having the elastic film stretchable structure 20 </ b> X in the exterior body 20. The arrangement of the stretchable region 80 and the non-stretchable region 70 can be determined as appropriate. In the case of the exterior body 20 of the pants-type disposable diaper as in the present embodiment, the portion overlapping the absorber 13 is an area that does not need to be expanded and contracted, and therefore, part or all of the portion overlapping the absorber 13 as illustrated. It is preferable to make the non-stretchable region 70 (desirably including almost the entire inner and outer fixed region 10B). Of course, the non-stretchable region 70 can be provided from the region overlapping with the absorber 13 to the region not overlapping with the absorber 13 positioned in the width direction or the front-rear direction, and the non-stretchable region 70 is provided only in the region not overlapping with the absorber 13. It can also be provided.

　非伸縮領域７０は、弾性フィルム３０は幅方向に連続するものの、貫通孔３１の存在により幅方向に沿って直線的に連続する部分を有しない領域とされている。したがって、弾性フィルム３０を幅方向に伸長した状態で、幅方向及びこれと直交する前後方向にそれぞれ間隔を空けて、弾性フィルム３０の貫通孔３１を介して第１シート層２０Ａ及び第２シート層２０Ｂを接合し、多数のシート接合部４０を形成することにより、伸縮領域８０及び非伸縮領域７０の両者を含む弾性フィルム伸縮構造２０Ｘ全体を形成するとしても、図２９に示すように、非伸縮領域７０では、弾性フィルム３０が幅方向に沿って直線的に連続しないため、弾性フィルム３０の収縮力が第１シート層２０Ａ及び第２シート層２０Ｂにほとんど作用せず、伸縮性がほぼ消失し、弾性限界伸びは１００％に近くなるのである。そしてこのような非伸縮領域７０では、第１シート層２０Ａ及び第２シート層２０Ｂが間隔を空けて配列された多数のシート接合部４０で接合されており、シート接合部４０が連続的とならないため、柔軟性の低下は防止される。換言すれば、弾性フィルム３０が幅方向に沿って直線的に連続しない部分の有無により伸縮領域８０及び非伸縮領域７０を形成することができる。また、非伸縮領域７０でも弾性フィルム３０の連続性が残っており、図３０に示されるサンプル写真からも分かるように、弾性フィルム３０の独立切断片が残ることもなく、また皺も形成されないため、極めて見栄えが良く、かつ貫通孔３１による厚み方向の通気性が確保される。非伸縮領域７０は、幅方向の弾性限界伸びが１２０％以下（好ましくは１１０％以下、より好ましくは１００％）であると好ましい。 The non-stretchable region 70 is a region that does not have a linearly continuous portion along the width direction due to the presence of the through-holes 31 although the elastic film 30 is continuous in the width direction. Therefore, in a state where the elastic film 30 is extended in the width direction, the first sheet layer 20 </ b> A and the second sheet layer are spaced via the through-holes 31 of the elastic film 30 with an interval in the width direction and the front-rear direction orthogonal thereto. Even if the elastic film stretchable structure 20X including both the stretchable region 80 and the non-stretchable region 70 is formed by joining 20B and forming a large number of sheet joint portions 40, as shown in FIG. In the region 70, since the elastic film 30 does not continue linearly along the width direction, the contraction force of the elastic film 30 hardly acts on the first sheet layer 20A and the second sheet layer 20B, and the stretchability is almost lost. The elastic limit elongation is close to 100%. In such a non-stretchable region 70, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined by a large number of sheet joining portions 40 arranged at intervals, and the sheet joining portion 40 is not continuous. Therefore, a decrease in flexibility is prevented. In other words, the stretchable region 80 and the non-stretchable region 70 can be formed by the presence or absence of a portion where the elastic film 30 does not continue linearly along the width direction. In addition, the continuity of the elastic film 30 remains even in the non-stretchable region 70, and as can be seen from the sample photograph shown in FIG. 30, the independent cut piece of the elastic film 30 does not remain and no wrinkles are formed. The appearance is very good and the air permeability in the thickness direction by the through hole 31 is ensured. The non-stretchable region 70 preferably has an elastic limit elongation in the width direction of 120% or less (preferably 110% or less, more preferably 100%).

　非伸縮領域７０における弾性フィルム３０における貫通孔３１の配列パターンは適宜定めることができるが、図２９に示すように千鳥状配置とし、貫通孔３１の前後方向の中心間隔３１ｅが貫通孔３１の前後方向の長さ３１ｙより短いパターンとすると、弾性フィルム３０の連続性を維持しつつ幅方向の直線連続性をほぼ完全に無くすことができ、見栄えも図３０に示すように好ましいものとなる。この場合、貫通孔３１の幅方向の中心間隔３１ｆが貫通孔３１の幅方向の長さ３１ｘより短いとがより好ましい。 The arrangement pattern of the through-holes 31 in the elastic film 30 in the non-stretchable region 70 can be determined as appropriate. However, as shown in FIG. 29, the arrangement pattern is staggered, and the center interval 31e in the front-rear direction of the through-holes 31 If the pattern is shorter than the length 31y in the direction, the linear continuity in the width direction can be almost completely eliminated while maintaining the continuity of the elastic film 30, and the appearance is also preferable as shown in FIG. In this case, it is more preferable that the center interval 31f in the width direction of the through hole 31 is shorter than the length 31x of the through hole 31 in the width direction.

　通常の場合、中でも弾性フィルム３０を幅方向に４倍に伸長したときの伸長応力が４～１２Ｎ／３５ｍｍのものである場合、非伸縮領域７０を幅方向に弾性限界まで伸ばした状態で、貫通孔３１の前後方向の中心間隔３１ｅが０．４～２．７ｍｍ、かつ貫通孔３１の前後方向の長さ３１ｙが０．５～３．０ｍｍ、特に０．７～１．１ｍｍであると好ましい。また、貫通孔３１の幅方向の中心間隔３１ｆが、貫通孔３１の前後方向の長さ３１ｙの０．５～２倍、特に１～１．２倍であると好ましく、貫通孔３１の幅方向の長さ３１ｘが、貫通孔３１の幅方向の中心間隔３１ｆの１．１～１．８倍、特に１．１～１．４倍であると好ましい。なお、非伸縮領域７０を幅方向に弾性限界まで伸ばした状態（換言すれば第１シート層２０Ａ及び第２シート層２０Ｂが完全に展開した状態）では、貫通孔３１の幅方向の中心間隔３１ｆはシート接合部４０の幅方向の中心間隔４０ｆに等しく、貫通孔３１の前後方向の中心間隔３１ｅはシート接合部４０の前後方向の中心間隔４０ｅに等しく、貫通孔３１の前後方向の長さ３１ｙはシート接合部４０の前後方向の長さ４０ｙに等しい。 Usually, when the elastic film 30 has a stretching stress of 4 to 12 N / 35 mm when the elastic film 30 is stretched four times in the width direction, the non-stretchable region 70 is stretched to the elastic limit in the width direction. The center distance 31e in the front-rear direction of the holes 31 is 0.4 to 2.7 mm, and the length 31 y in the front-rear direction of the through holes 31 is preferably 0.5 to 3.0 mm, particularly 0.7 to 1.1 mm. . Further, the center interval 31f in the width direction of the through hole 31 is preferably 0.5 to 2 times, particularly 1 to 1.2 times the length 31y in the front-rear direction of the through hole 31. The length 31x of the through hole 31 is preferably 1.1 to 1.8 times, particularly 1.1 to 1.4 times the center interval 31f in the width direction of the through hole 31. In the state in which the non-stretchable region 70 is extended to the elastic limit in the width direction (in other words, the first sheet layer 20A and the second sheet layer 20B are completely expanded), the center interval 31f in the width direction of the through hole 31 Is equal to the center interval 40f in the width direction of the sheet bonding portion 40, the center interval 31e in the front-rear direction of the through-hole 31 is equal to the center interval 40e in the front-rear direction of the sheet bonding portion 40, and the length 31y in the front-rear direction of the through-hole 31 Is equal to the length 40y in the front-rear direction of the sheet joint 40.

　非伸縮領域７０では、シート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの間以外では、第１シート層２０Ａ及び第２シート層２０Ｂと弾性フィルム３０とが接合されておらず、かつ自然長の状態でシート接合部４０の幅方向両側に弾性フィルム３０の貫通孔３１の周縁及びシート接合部４０が離間されて形成された隙間を有していると、弾性フィルム３０の素材が無孔のフィルムやシートであっても、この隙間により常に通気性が付加されるため好ましい。前述の貫通孔３１及びシート接合部４０の同時形成手法を採用する場合には、シート接合部４０の形状等に関係なく、自然にこの状態になる。 In the non-stretchable region 70, the first sheet layer 20A and the second sheet layer 20B and the elastic film 30 are not joined except for the portion between the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40, And when it has a gap formed by separating the peripheral edge of the through hole 31 of the elastic film 30 and the sheet bonding portion 40 on both sides in the width direction of the sheet bonding portion 40 in a natural length state, the material of the elastic film 30 is Even a non-porous film or sheet is preferable because air permeability is always added by this gap. In the case where the above-described simultaneous formation method of the through hole 31 and the sheet joint portion 40 is adopted, this state naturally occurs regardless of the shape or the like of the sheet joint portion 40.

　個々のシート接合部４０及び貫通孔３１の自然長状態での形状は、特に限定されないが、柔軟性の観点からは面積が小さいことが望ましく、弾性フィルム３０の幅方向の直線連続性をなくすためには、前後方向に長い形状であることが望ましいため、前後方向に長い楕円形、長方形（図２７、図２９（ｄ）参照）、ひし形（図２９（ｂ）参照）、凸レンズ形（図２９（ａ）参照）、凹レンズ形（図２９（ｃ）参照）とすることが好ましい。ただし、ひし形のように角が鋭角であると、弾性フィルム３０が破断しやすい。これに対して、凸レンズ形はシート接合部４０の溶着が安定するため好ましく、凹レンズ形は面積をより小さくできる点で好ましい。 Although the shape in the natural length state of each sheet | seat junction part 40 and the through-hole 31 is not specifically limited, In order to eliminate the linear continuity of the width direction of the elastic film 30, it is desirable that an area is small from a softness | flexibility viewpoint. Since it is desirable to have a shape that is long in the front-rear direction, an ellipse that is long in the front-rear direction, a rectangle (see FIG. 27, FIG. 29D), a rhombus (see FIG. 29B), and a convex lens shape (FIG. 29). (Refer to (a)) and a concave lens shape (refer to FIG. 29 (c)). However, if the corner is an acute angle like a diamond, the elastic film 30 is easily broken. On the other hand, the convex lens shape is preferable because the welding of the sheet joining portion 40 is stable, and the concave lens shape is preferable in that the area can be further reduced.

　非伸縮領域におけるシート接合部４０の面積率及び個々のシート接合部４０の面積は適宜定めることができるが、通常の場合、次の範囲内とすると、各シート接合部４０の面積が小さくかつシート接合部４０の面積率が低いことにより非伸縮領域７０が硬くならいためが好ましい。
　シート接合部４０の面積：０．１０～０．７５ｍｍ2（特に０．１０～０．３５ｍｍ2）
　シート接合部４０の面積率：４～１３％（特に５～１０％） Although the area ratio of the sheet joint portion 40 and the area of each sheet joint portion 40 in the non-stretchable region can be determined as appropriate, in the normal case, if within the following range, the area of each sheet joint portion 40 is small and the sheet It is preferable that the non-stretchable region 70 does not become hard because the area ratio of the joint portion 40 is low.
Area of sheet joint 40: 0.10 to 0.75 mm 2 (particularly 0.10 to 0.35 mm 2 )
Sheet area 40: 4 to 13% (especially 5 to 10%)

　このように、非伸縮領域７０の弾性限界伸びは、貫通孔３１の配列パターンや、個々の貫通孔３１の寸法及び中心間隔により変化させることができる。よって、図示しないが、これらを伸縮領域８０内の複数個所、又は複数の非伸縮領域７０間で異ならしめることもできる。例えば、前身頃Ｆの非伸縮領域７０における弾性限界伸びを後身頃Ｂの非伸縮領域７０における弾性限界伸びよりも大きくするのは一つの好ましい形態である。 Thus, the elastic limit elongation of the non-stretchable region 70 can be changed according to the arrangement pattern of the through holes 31, the dimensions of the individual through holes 31, and the center interval. Therefore, although not shown, these can be made different at a plurality of locations in the stretchable region 80 or between the plurality of non-stretchable regions 70. For example, it is one preferable mode to make the elastic limit elongation in the non-stretchable region 70 of the front body F larger than the elastic limit elongation in the non-stretchable region 70 of the rear body B.

　非伸縮領域７０は、伸縮領域と同様に幅方向に沿って直線的に連続する部分を有するものの、シート接合部の面積率が伸縮領域よりも高いことにより弾性限界伸びが著しく、具体的には１３０％以下とされている形態、従来の糸ゴムを用いる伸縮構造のように幅方向に一か所又は複数個所で切断する形態等、他の伸縮性を殺す形態を採用することもできる。 Although the non-stretchable region 70 has a portion that is linearly continuous along the width direction like the stretchable region, the elastic limit elongation is remarkable because the area ratio of the sheet joint portion is higher than the stretchable region. It is also possible to adopt a form that kills other stretchability, such as a form that is 130% or less, a form that is cut at one place or a plurality of places in the width direction, such as a stretchable structure using a conventional rubber thread.

　（無吸収体側部に対する位置関係）
　特徴的には、図２２に示すように、前身頃Ｆの外装体２０における、吸収体１３の括れ部分１３Ｎの最も幅の狭い部分１３ｍと対応する前後方向範囲内から、胴周り領域Ｔ内にかけて、弾性フィルム伸縮構造２０Ｘを有しており、この弾性フィルム伸縮構造２０Ｘを有する領域の伸縮領域８０は、内外固定領域１０Ｂのうち少なくとも無吸収体側部１７を外装体２０に固定する部分１０ｃ（斜線領域）を含んでいる。この結果、内装体１０の無吸収体側部１７が外装体２０の伸縮領域８０に固定されることとなるため、装着状態では、図３２（ａ）に示す状態ではなく、図３２（ｂ）に示す状態となる。つまり、外装体２０の伸縮領域８０の収縮により内装体１０の無吸収体側部１７が幅方向中央側に収縮し、これに伴い立体ギャザー９０の立ち上がり位置が白抜き矢印で示すように幅方向中央側に移動し、吸収体１３の括れ部分１３Ｎの側縁により近い位置、つまり装着者の股間幅に適した位置から立ち上がるため、股間部及びその前後近傍における脚の付け根へのフィット性が向上し、漏れ防止性が高いものとなる。しかも、脚開口に沿って延びる細長状弾性伸縮部材を有しないため、構造が簡素で、柔軟性が損なわれることもない。 (Positional relationship to the non-absorbent side)
Characteristically, as shown in FIG. 22, from the front-rear direction range corresponding to the narrowest portion 13m of the constricted portion 13N of the absorbent body 13 in the outer body 20 of the front body F, to the waist region T The elastic film expansion / contraction structure 20X has an elastic film expansion / contraction structure 20X. The expansion / contraction region 80 in the region having the elastic film expansion / contraction structure 20X is a portion 10c (diagonal line) for fixing at least the non-absorbent side 17 to the exterior body 20 in the internal / external fixing region 10B Area). As a result, the non-absorbent body side portion 17 of the interior body 10 is fixed to the expansion / contraction region 80 of the exterior body 20, so that in the mounted state, not the state shown in FIG. It will be in the state shown. That is, the non-absorbent body side portion 17 of the interior body 10 contracts to the center in the width direction due to the contraction of the expansion / contraction region 80 of the exterior body 20, and accordingly the rising position of the three-dimensional gather 90 is the center in the width direction as indicated by the white arrow. Since it moves to the side and rises from a position closer to the side edge of the constricted portion 13N of the absorbent body 13, that is, a position suitable for the wearer's crotch width, the fit to the crotch part and the base of the leg is improved. , Leakage prevention is high. And since it does not have the elongate elastic expansion-contraction member extended along leg opening, a structure is simple and a softness | flexibility is not impaired.

　この場合、前身頃Ｆの弾性フィルム伸縮構造２０Ｘを構成する弾性フィルム３０の後端３０ｂが、パンツタイプ使い捨ておむつの前後方向中央から前側に６０ｍｍまでの範囲内に位置されていると好ましい。 In this case, it is preferable that the rear end 30b of the elastic film 30 constituting the elastic film expansion / contraction structure 20X of the front body F is located within a range of 60 mm from the front-rear direction center of the pants-type disposable diaper to the front side.

　これに代えて又はこれとともに、図２２に示す形態のように、後身頃Ｂの外装体２０においても、吸収体１３の括れ部分１３Ｎの最も幅の狭い部分と対応する前後方向範囲内から胴周り領域Ｔ内にかけて弾性フィルム伸縮構造２０Ｘを有しており、この弾性フィルム伸縮構造２０Ｘを有する領域の伸縮領域８０は、内外固定領域１０Ｂのうち少なくとも無吸収体側部１７を外装体２０に固定する部分１０ｃを含む形態とすることができる。この場合、後身頃Ｂの弾性フィルム伸縮構造２０Ｘを構成する弾性フィルム３０の前端３０ｆが、パンツタイプ使い捨ておむつの前後方向中央から後側に６０ｍｍまでの範囲内に位置されていると好ましい。もちろん、前身頃Ｆ及び後身頃Ｂのいずれか一方の外装体２０では、吸収体１３の括れ部分１３Ｎの最も幅の狭い部分と対応する前後方向範囲より後側から胴周り領域Ｔ内にかけて、弾性フィルム伸縮構造２０Ｘを有する形態とすることもできる。 Alternatively or together with this, also in the exterior body 20 of the back body B, as in the form shown in FIG. 22, the waistline from within the front-rear direction range corresponding to the narrowest part of the constricted part 13N of the absorbent body 13 The elastic film expansion / contraction structure 20X is provided in the region T, and the expansion / contraction region 80 of the region having the elastic film expansion / contraction structure 20X is a portion for fixing at least the non-absorbent body side portion 17 to the exterior body 20 in the inner / outer fixing region 10B. 10c may be included. In this case, it is preferable that the front end 30f of the elastic film 30 constituting the elastic film expansion / contraction structure 20X of the back body B is located within a range of 60 mm from the front-rear direction center to the rear side of the pants-type disposable diaper. Of course, the outer body 20 of either the front body F or the back body B is elastic from the back side to the waist region T from the front-rear direction range corresponding to the narrowest part of the constricted part 13N of the absorbent body 13. It can also be set as the form which has the film expansion-contraction structure 20X.

　内装体１０の無吸収体側部１７を外装体２０の伸縮領域８０により収縮させる場合、外装体２０の内外固定領域１０Ｂのうち無吸収体側部１７と重なる部分にのみ伸縮領域８０を設けても良いが、図３３に示すように、前身頃Ｆの弾性フィルム伸縮構造２０Ｘの伸縮領域８０により内装体１０の無吸収体側部１７を幅方向に収縮させる場合には、前身頃Ｆの弾性フィルム伸縮構造２０Ｘを有する領域のうち内外固定領域１０Ｂと重なる領域全体を、その側方に位置する領域より、弾性限界伸びが短い弱伸縮領域８４とするのは好ましい形態である。これにより、股間部及びその前後近傍における脚の付け根へのフィット性はもちろん、下腹部から股間にかけての身体部位に対する前身頃Ｆのフィット性が向上するとともに、排尿時における前側の吸収体１３の膨張（一般に前側が後側よりも膨張しやすい）を抑制し、下着のような外観を維持することができる。 When the non-absorbent body side portion 17 of the interior body 10 is contracted by the stretchable region 80 of the exterior body 20, the stretchable region 80 may be provided only in a portion overlapping the non-absorbent body side portion 17 in the inside / outside fixing region 10B of the exterior body 20. However, as shown in FIG. 33, when the non-absorbent body side portion 17 of the interior body 10 is contracted in the width direction by the elastic region 80 of the elastic film elastic structure 20X of the front body F, the elastic film elastic structure of the front body F It is a preferable mode that the entire region overlapping the inner and outer fixed regions 10B in the region having 20X is the weakly stretchable region 84 whose elastic limit elongation is shorter than the region located on the side thereof. This improves the fit of the front body F to the body part from the lower abdomen to the crotch, as well as the fit to the crotch and the base of the leg in the vicinity of the crotch, and the expansion of the front absorbent body 13 during urination (In general, the front side is easier to expand than the rear side), and the appearance like underwear can be maintained.

　また、前身頃Ｆにおける外装体２０の伸縮領域８０により内装体１０の無吸収体側部１７を幅方向に収縮させる場合には、図３３に示すように、後身頃Ｂの外装体２０の弾性フィルム伸縮構造２０Ｘを有する領域のうち、内外固定領域１０Ｂと重なる領域全体（無吸収体側部１７と重なる領域を含む）を、非伸縮領域７０とするのは好ましい形態である。これにより、股間部及びその前後近傍における脚の付け根へのフィット性はもちろん、股間から臀部の膨らみにかけての後身頃Ｂのフィット性も良好となる。 When the non-absorbent body side portion 17 of the interior body 10 is contracted in the width direction by the expansion / contraction region 80 of the exterior body 20 in the front body F, the elastic film of the exterior body 20 in the back body B as shown in FIG. Of the regions having the stretchable structure 20X, the entire region (including the region overlapping the non-absorbent body side portion 17) that overlaps with the inner / outer fixed region 10B is preferably the non-stretchable region 70. As a result, the fit of the back body B from the crotch to the bulge of the buttocks as well as the fit to the crotch and the base of the leg in the vicinity of the crotch is improved.

　さらに、外装体２０における無吸収体側部１７と重なる領域は、脚開口の縁部分の一部をなすため、図３３に示すように、サイドシール部２１から無吸収体側部１７と重なる領域の側縁までの脚開口の縁部領域８２は、そのウエスト側に隣接する部分よりも幅方向の伸長応力が弱い伸縮領域とされていることが望ましい。これにより、脚開口の縁部領域８２の肌触りがサイドシール部２１から無吸収体側部１７と重なる領域までほぼ同様に柔軟となり、無吸収体側部１７のみが幅方向に収縮することによる違和感が軽減される。 Further, since the region overlapping the non-absorbent side portion 17 in the exterior body 20 forms a part of the edge portion of the leg opening, as shown in FIG. 33, the side of the region overlapping the non-absorbent side portion 17 from the side seal portion 21 It is desirable that the edge region 82 of the leg opening to the edge is an expansion / contraction region where the extension stress in the width direction is weaker than the portion adjacent to the waist side. As a result, the feel of the edge region 82 of the leg opening becomes flexible in a similar manner from the side seal portion 21 to the region overlapping the non-absorbent side portion 17, and the uncomfortable feeling due to contraction of only the non-absorbent side portion 17 in the width direction is reduced. Is done.

　＜その他＞
　上記第１の課題を解決するための形態の一部又は全部は、上記第２の課題を解決するための形態に適用することができ、反対に上記第２の課題を解決するための形態の一部又は全部は、上記第１の課題を解決するための形態に適用することもできる。 <Others>
Part or all of the form for solving the first problem can be applied to the form for solving the second problem, and conversely, the form for solving the second problem Part or all of them can be applied to a form for solving the first problem.

　＜明細書中の用語の説明＞
　明細書中の以下の用語は、明細書中に特に記載が無い限り、以下の意味を有するものである。
　・「前身頃」「後身頃」は、パンツタイプ使い捨ておむつの前後方向中央を境としてそれぞれ前側及び後側の部分を意味する。また、股間部は、パンツタイプ使い捨ておむつの前後方向中央を含む前後方向範囲を意味し、吸収体が括れ部を有する場合には当該括れ部を有する部分の前後方向範囲を意味する。
　・「弾性限界伸び」とは、伸縮方向における弾性限界（換言すれば第１シート層及び第２シート層が完全に展開した状態）の伸びを意味し、弾性限界時の長さを自然長を１００％としたときの百分率で表すものである。
　・「面積率」とは単位面積に占める対象部分の割合を意味し、対象領域（例えば伸縮領域８０、非伸縮領域７０）における対象部分（例えばシート接合部４０、貫通孔３１の開口）の総和面積を当該対象領域の面積で除して百分率で表すものであり、特に伸縮構造を有する領域における面積率（例えばシート接合部の面積率）とは、伸縮方向に弾性限界まで伸ばした状態の面積率を意味するものである。対象部分が間隔を空けて多数設けられる形態では、対象部分が１０個以上含まれるような大きさに対象領域を設定して、面積率を求めることが望ましい。
　・貫通孔の開口の面積は、弾性フィルム伸縮構造が自然長の状態における値を意味し、貫通孔の開口の面積が、弾性フィルムの表と裏で異なる等、厚み方向に均一でない場合には最小値を意味する。
　・ＭＤ方向とはマシンディレクション、つまりライン流れ方向を意味し、ＣＤ方向とはＭＤ方向と直交する横方向を意味する。
　・「伸長率」は、自然長を１００％としたときの値を意味する。
　・「目付け」は次のようにして測定されるものである。試料又は試験片を予備乾燥した後、標準状態（試験場所は、温度２０±５℃、相対湿度６５％以下）の試験室又は装置内に放置し、恒量になった状態にする。予備乾燥は、試料又は試験片を相対湿度１０～２５％、温度５０℃を超えない環境で恒量にすることをいう。なお、公定水分率が０．０％の繊維については、予備乾燥を行わなくてもよい。恒量になった状態の試験片から米坪板(２００ｍｍ×２５０ｍｍ、±２ｍｍ)を使用し、２００ｍｍ×２５０ｍｍ（±２ｍｍ）の寸法の試料を切り取る。試料の重量を測定し、２０倍して１平米あたりの重さを算出し、目付けとする。
　・吸収体の「厚み」は、株式会社尾崎製作所の厚み測定器（ピーコック、ダイヤルシックネスゲージ大型タイプ、型式Ｊ－Ｂ（測定範囲０～３５ｍｍ）又は型式Ｋ－４（測定範囲０～５０ｍｍ））を用い、試料と厚み測定器を水平にして、測定する。
　・上記以外の「厚み」は、自動厚み測定器（ＫＥＳ－Ｇ５　ハンディ圧縮計測プログラム）を用い、荷重：１０ｇｆ／ｃｍ2、及び加圧面積：２ｃｍ2の条件下で自動測定する。
　・「引張強度」及び「引張伸度（破断伸び）」は、試験片を幅３５ｍｍ×長さ８０ｍｍの長方形状とする以外は、ＪＩＳ　Ｋ７１２７：１９９９「プラスチック－引張特性の試験方法－」に準じて、初期チャック間隔（標線間距離）を５０ｍｍとし、引張速度を３００ｍｍ／ｍｉｎとして測定される値を意味する。引張試験機としては、例えばＳＨＩＭＡＤＺＵ社製のＡＯＵＴＧＲＡＰＨＡＧＳ－Ｇ１００Ｎを用いることができる。
　・「伸長応力」とは、ＪＩＳ　Ｋ７１２７：１９９９「プラスチック－引張特性の試験方法－」に準じて、初期チャック間隔（標線間距離）を５０ｍｍとし、引張速度を３００ｍｍ／ｍｉｎとする引張試験により、弾性領域内で伸長するときに測定される引張応力（Ｎ／３５ｍｍ）を意味し、伸長の程度は試験対象により適宜決定することができる。試験片は幅３５ｍｍ、長さ８０ｍｍ以上の長方形状とすることが好ましいが、幅３５ｍｍの試験片を切り出すことができない場合には、切り出し可能な幅で試験片を作成し、測定値を幅３５ｍｍに換算した値とする。また、対象領域が小さく、十分な試験片を採取できない場合であっても、伸長応力の大小を比較するのであれば、適宜小さい試験片でも同寸法の試験片を用いる限り少なくとも比較は可能である。引張試験機としては、例えばＳＨＩＭＡＤＺＵ社製のＡＯＵＴＧＲＡＰＨＡＧＳ－Ｇ１００Ｎを用いることができる。
　・「展開状態」とは、収縮や弛み無く平坦に展開した状態を意味する。
　・各部の寸法は、特に記載が無い限り、自然長状態ではなく展開状態における寸法を意味する。
　・試験や測定における環境条件についての記載が無い場合、その試験や測定は、標準状態（試験場所は、温度２０±５℃、相対湿度６５％以下）の試験室又は装置内で行うものとする。 <Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
-"Front body" and "rear body" mean the front and rear portions of the pants-type disposable diaper in the front-rear direction center, respectively. Moreover, a crotch part means the front-back direction range containing the center of the front-back direction of a pants type disposable diaper, and when an absorber has a constriction part, it means the front-back direction range of the part which has the said constriction part.
-“Elastic limit elongation” means the elongation of the elastic limit in the expansion / contraction direction (in other words, the state in which the first sheet layer and the second sheet layer are completely expanded), and the length at the elastic limit is the natural length. It is expressed as a percentage when 100% is assumed.
“Area ratio” means the ratio of the target portion to the unit area, and the sum of the target portions (for example, the opening of the sheet joint portion 40 and the through hole 31) in the target region (for example, the stretchable region 80 and the non-stretchable region 70). The area is divided by the area of the target area and expressed as a percentage, and in particular, the area ratio (for example, the area ratio of the sheet joint portion) in the area having the stretchable structure is the area in the stretched direction to the elastic limit. It means rate. In a form in which a large number of target portions are provided at intervals, it is desirable to set the target region to a size that includes 10 or more target portions and obtain the area ratio.
・ The area of the opening of the through hole means the value in the state where the elastic film stretchable structure is in a natural length, and the area of the opening of the through hole is not uniform in the thickness direction, such as different between the front and back of the elastic film. Means the minimum value.
The MD direction means machine direction, that is, the line flow direction, and the CD direction means a lateral direction orthogonal to the MD direction.
“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" of the absorber is a thickness measuring instrument from Ozaki Manufacturing Co., Ltd. (peacock, dial thickness gauge large type, model JB (measurement range 0 to 35 mm) or model K-4 (measurement range 0 to 50 mm)) Measure the sample and the thickness meter horizontally.
“Thickness” other than the above 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 .
・ "Tensile strength" and "Tensile elongation (breaking elongation)" conform to JIS K7127: 1999 "Plastics-Test method for tensile properties-" except that the test piece is rectangular with a width of 35 mm x length of 80 mm. The initial chuck interval (distance between marked lines) is 50 mm, and the tensile speed is 300 mm / min. As the tensile tester, for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU can be used.
・ "Elongation stress" refers to a tensile test according to JIS K7127: 1999 "Plastics-Test method for tensile properties-" with an initial chuck interval (distance between marked lines) of 50 mm and a tensile speed of 300 mm / min. This means the tensile stress (N / 35 mm) measured when stretching in the elastic region, and the degree of stretching can be appropriately determined depending on the test object. It is preferable that the test piece has a rectangular shape with a width of 35 mm and a length of 80 mm or more. However, when a test piece with a width of 35 mm cannot be cut out, the test piece is prepared with a width that can be cut out, and the measured value is 35 mm. The value converted to. Even if the target area is small and sufficient specimens cannot be collected, as long as the magnitude of the extension stress is compared, at least a comparison can be made even if the specimens of the same size are used even if they are appropriately small. . As the tensile tester, for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU can be used.
-"Developed state" means a state where the plate is flattened without contraction or slack.
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.
・ 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 ℃, relative humidity 65% or less). .

　本発明は、上記例のようなパンツタイプ使い捨ておむつに利用できるものである。 The present invention can be used for a pants-type disposable diaper as in the above example.

　Ｂ…後身頃、Ｆ…前身頃、Ｌ…中間領域、Ｔ…胴周り領域、１０…内装体、１１…トップシート、１２…液不透過性シート、１３…吸収体、１３Ｎ…括れ部分、１３ａ…低目付部、１４…包装シート、１５…固定領域、１７…無吸収体側部、２０…外装体、２０Ａ…第１シート層、２０Ｂ…第２シート層、２０Ｃ…折り返し部分、２０Ｘ…弾性フィルム伸縮構造、２１…サイドシール部、２３…ウエスト端部領域、２４…ウエスト部弾性部材、２５…収縮皺、２９…脚周りライン、３０…弾性フィルム、３１…貫通孔、４０…接合部、７０…非伸縮領域、８０…伸縮領域、８４…弱伸縮領域、９０…立体ギャザー、９５…ギャザーシート、９６…ギャザー弾性部材。 B ... Rear body, F ... Front body, L ... Middle region, T ... Trunk circumference region, 10 ... Interior body, 11 ... Top sheet, 12 ... Liquid impervious sheet, 13 ... Absorber, 13N ... Constricted portion, 13a DESCRIPTION OF SYMBOLS ... Low weight part, 14 ... Packaging sheet, 15 ... Fixed area | region, 17 ... Non-absorbent body side part, 20 ... Exterior body, 20A ... 1st sheet layer, 20B ... 2nd sheet layer, 20C ... Folded part, 20X ... Elastic film Stretch structure, 21 ... side seal portion, 23 ... waist end region, 24 ... waist elastic member, 25 ... shrinkage fold, 29 ... leg circumference line, 30 ... elastic film, 31 ... through hole, 40 ... joint, 70 ... non-stretchable region, 80 ... stretchable region, 84 ... weakly stretchable region, 90 ... solid gather, 95 ... gather sheet, 96 ... gather elastic member.

Claims (13)

　前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から後身頃にわたるように外装体の内面に固定された、吸収体を含む内装体とを備え、
　前身頃の外装体の両側縁部と後身頃の外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつにおいて、
　前記外装体における内装体の固定領域のうち、前後方向の少なくとも股間部の領域は、幅方向に伸縮可能な伸縮領域とされており、
　前記伸縮領域は、第１シート層と、第２シート層との間に弾性フィルムが積層されるとともに、前記弾性フィルムが幅方向に伸長された状態で、前記第１シート層及び第２シート層が、幅方向及び前後方向にそれぞれ間隔を空けて配列された多数の接合部で、直接的又は間接的に接合された弾性フィルム伸縮構造とされている、
　ことを特徴とするパンツタイプ使い捨ておむつ。 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 fixed to the inner surface of the exterior body so as to extend from the front body to the back body,
A pants-type disposable diaper having a waist opening and a pair of left and right leg openings formed by joining side edges of the outer body of the front body and both side edges of the outer body of the rear body to form a side seal part In
Of the fixed area of the interior body in the exterior body, the area of at least the crotch part in the front-rear direction is an expansion / contraction area that can be expanded and contracted in the width direction,
In the stretchable region, an elastic film is laminated between the first sheet layer and the second sheet layer, and the elastic film is stretched in the width direction, and the first sheet layer and the second sheet layer However, it is an elastic film stretchable structure joined directly or indirectly with a large number of joints arranged at intervals in the width direction and the front-rear direction,
A pants-type disposable diaper characterized by that. 　前記弾性フィルム伸縮構造を有する伸縮領域は、前記外装体における内装体の固定領域及びその周囲の領域にわたり設けられており、前記内装体の固定領域における前記接合部の面積率が、前記周囲の領域における前記接合部の面積率よりも高い、請求項１記載のパンツタイプ使い捨ておむつ。 The stretchable region having the elastic film stretchable structure is provided over the fixed region of the interior body and the surrounding region thereof in the exterior body, and the area ratio of the joint portion in the fixed region of the interior body is the peripheral region. The underpants type disposable diaper of Claim 1 which is higher than the area ratio of the said junction part in. 　個々の前記接合部の面積は０．１４～３．５ｍｍ2であり、
　前記内装体の固定領域における前記接合部の面積率は５～２５％であり、
　前記周囲の領域における前記接合部の面積率は１．８～１９．１％である、請求項２記載のパンツタイプ使い捨ておむつ。 The area of each of the joints is 0.14 to 3.5 mm 2 ,
The area ratio of the joint in the fixed region of the interior body is 5 to 25%,
The pants-type disposable diaper according to claim 2, wherein an area ratio of the joint portion in the surrounding region is 1.8 to 19.1%. 　前記内装体の固定領域における弾性限界伸びは１３０～２００％であり、
　前記周囲の領域における弾性限界伸びは２００％以上である、請求項２又は３記載のパンツタイプ使い捨ておむつ。 The elastic limit elongation in the fixed region of the interior body is 130 to 200%,
The pants-type disposable diaper according to claim 2 or 3, wherein the elastic limit elongation in the surrounding region is 200% or more. 　前記前身頃の前記内装体の固定領域における前記接合部の面積率が、前記後身頃の前記内装体の固定領域における前記接合部の面積率よりも低い、請求項１～４のいずれか１項に記載のパンツタイプ使い捨ておむつ。 The area ratio of the joint portion in the fixing region of the inner body in the front body is lower than the area ratio of the joint portion in the fixing region of the inner body in the rear body. The pants-type disposable diaper described in 1. 　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記内装体の固定領域における前記接合部の面積率が、前後方向中央からウエスト開口側に向かうにつれて段階的又は連続的に高くなる、
　請求項１～５のいずれか１項に記載のパンツタイプ使い捨ておむつ。 The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The area ratio of the joint in the fixed region of the interior body increases stepwise or continuously from the center in the front-rear direction toward the waist opening side,
The pants-type disposable diaper according to any one of claims 1 to 5. 　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記吸収体は、ウエスト開口側から前後方向中央に向かうにつれて幅が段階的又は連続的に狭くなる形状を有している、
　請求項１～６のいずれか１項に記載のパンツタイプ使い捨ておむつ。 The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The absorber has a shape in which the width gradually or continuously narrows from the waist opening side toward the center in the front-rear direction.
The pants-type disposable diaper according to any one of claims 1 to 6. 　前記弾性フィルム伸縮構造を有する伸縮領域は、前記股間部の前後両側に延在されており、
　前記吸収体は、ウエスト開口側から股間部側に向かうにつれて幅が段階的又は連続的に広くなる形状の、周囲よりも目付けが低い低目付部を有している、
　請求項１～７のいずれか１項に記載のパンツタイプ使い捨ておむつ。 The stretchable region having the elastic film stretchable structure extends on both front and rear sides of the crotch portion,
The absorbent body has a low basis weight part having a lower basis weight than the surroundings in a shape in which the width gradually or continuously widens from the waist opening side toward the crotch part side,
The pants-type disposable diaper according to any one of claims 1 to 7. 　前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から股間部を経て後身頃に達するように前記外装体に取り付けられた、吸収体を含む内装体とを備え、
　前記前身頃における前記外装体の両側縁部と前記後身頃における前記外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成された、
　パンツタイプ使い捨ておむつにおいて、
　前記吸収体の股間部に、前後両側よりも幅の狭い括れ部分が形成されるとともに、前記内装体における、前記吸収体の括れ部分と対応する両側部が、吸収体を有しない無吸収体側部とされており、
　前記外装体は、前記吸収体の側縁より側方に延在されており、
　前記内装体は、一方の前記無吸収体側部から他方の前記無吸収体側部にわたる幅で、かつ無吸収体側部の前後両側にわたる内外固定領域で、前記外装体に固定されており、
　前記内装体の両側縁から装着者の肌側に立ち上がる立体ギャザーが、前記無吸収体側部の前後両側にかけて設けられており、
　前記外装体は、前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前身頃及び後身頃の少なくとも一方における、前記サイドシール部と対応する前後方向範囲内にかけて、第１シート層及び第２シート層の間に弾性フィルムが積層されるとともに、前記第１シート層及び第２シート層が、間隔を空けて配列された多数のシート接合部で直接的又は間接的に接合された、弾性フィルム伸縮構造を有しており、
　前記外装体における前記弾性フィルム伸縮構造を有する領域は、前記弾性フィルムの収縮により幅方向に収縮しているとともに、幅方向に伸長可能である伸縮領域を有しており、
　この伸縮領域は、前記内外固定領域のうち少なくとも前記無吸収体側部を前記外装体に固定する部分を含み、
　前記外装体は、前記脚開口に沿って延びる細長状弾性伸縮部材を有しない、
　ことを特徴とするパンツタイプ使い捨ておむつ。 An exterior body that individually or integrally configures the front body and the back body, and an interior body including an absorber attached to the exterior body so as to reach the back body from the front body through the crotch part,
A waist opening and a pair of left and right leg openings are formed by joining the side edge portions of the exterior body in the front body and the side edge portions of the exterior body in the back body to form a side seal portion. ,
In pants-type disposable diapers,
In the crotch portion of the absorbent body, a narrowed portion narrower than both front and rear sides is formed, and both side portions of the interior body corresponding to the narrowed portion of the absorbent body have no absorbent body. And
The exterior body extends laterally from a side edge of the absorber,
The interior body is fixed to the exterior body in a width extending from one non-absorbent body side to the other non-absorbent body side, and in the inner and outer fixing regions extending from the front and rear sides of the non-absorbent body side,
A three-dimensional gather that stands on the skin side of the wearer from both side edges of the interior body is provided over both front and rear sides of the non-absorbent body side,
The exterior body has a first sheet layer extending from the front-rear direction range corresponding to the narrowest portion of the constricted portion to the front-rear direction range corresponding to the side seal portion in at least one of the front body and the rear body. In addition, an elastic film is laminated between the second sheet layer, and the first sheet layer and the second sheet layer are directly or indirectly joined at a plurality of sheet joint portions arranged at intervals. , Has an elastic film stretchable structure,
The region having the elastic film stretchable structure in the exterior body has a stretchable region that is shrinkable in the width direction due to the shrinkage of the elastic film, and is stretchable in the width direction,
This stretchable region includes a portion for fixing at least the non-absorbent side of the inner and outer fixed region to the exterior body,
The exterior body does not have an elongated elastic elastic member extending along the leg opening,
A pants-type disposable diaper characterized by that. 　前記前身頃の外装体は、前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前記サイドシール部と対応する前後方向範囲内にかけて、前記弾性フィルム伸縮構造を有するとともに、その弾性フィルム伸縮構造を有する領域のうち、前記内外固定領域と重なる領域は、その側方に位置する領域より、弾性限界伸びが短い弱伸縮領域とされている、請求項９記載のパンツタイプ使い捨ておむつ。 The outer body of the front body has the elastic film stretchable structure from the front-rear direction range corresponding to the narrowest part of the constricted part to the front-rear direction range corresponding to the side seal part, and its elasticity The pants-type disposable diaper according to claim 9, wherein a region overlapping with the inner / outer fixed region among regions having a film stretchable structure is a weak stretchable region having a shorter elastic limit elongation than a region located on a side thereof. 　前記後身頃の外装体は、前記サイドシール部と対応する前後方向範囲及びその前側の前後方向範囲内にかけて、前記弾性フィルム伸縮構造を有するとともに、その弾性フィルム伸縮構造を有する領域のうち、前記内外固定領域と重なる領域は非伸縮領域とされている、請求項１０記載のパンツタイプ使い捨ておむつ。 The outer body of the rear body has the elastic film stretchable structure over the front-rear direction range corresponding to the side seal portion and the front-rear direction range, and the inner and outer sides of the region having the elastic film stretchable structure. The underpants type disposable diaper according to claim 10, wherein a region overlapping with the fixed region is a non-stretchable region. 　前記前身頃及び後身頃のそれぞれに弾性フィルム伸縮構造を有するとともに、前記前身頃の弾性フィルム伸縮構造を構成する弾性フィルムと、前記後身頃の弾性フィルム伸縮構造を構成する弾性フィルムとが前後別々でかつ前後方向に離間しており、
　前記前身頃の弾性フィルム伸縮構造を構成する弾性フィルムの後端が、パンツタイプ使い捨ておむつの前後方向中央から前側に６０ｍｍまでの範囲内に位置されている、請求項１０又は１１記載のパンツタイプ使い捨ておむつ。 Each of the front body and the back body has an elastic film stretchable structure, and the elastic film constituting the elastic film stretchable structure of the front body and the elastic film constituting the elastic film stretchable structure of the back body are separated front and back And separated in the front-rear direction,
12. The pant-type disposable according to claim 10, wherein a rear end of the elastic film constituting the elastic film stretchable structure of the front body is located within a range of 60 mm from the center in the front-rear direction of the pant-type disposable diaper to the front side. Diapers. 　前記括れ部分の最も幅の狭い部分と対応する前後方向範囲内から、前記サイドシール部と対応する前後方向範囲内にかけて設けられた前記弾性フィルム伸縮構造における前記伸縮領域は、前記サイドシール部から前記無吸収体側部と重なる領域の側縁までの脚開口の縁部領域では、そのウエスト側に隣接する部分よりも幅方向の伸長応力が弱い、請求項９～１２のいずれか１項に記載のパンツタイプ使い捨ておむつ。 The stretchable region in the elastic film stretchable structure provided from the front-rear direction range corresponding to the narrowest portion of the constricted portion to the front-rear direction range corresponding to the side seal portion is from the side seal portion to the The extension stress in the width direction is weaker in the edge region of the leg opening up to the side edge of the region overlapping with the non-absorbent side portion than in the portion adjacent to the waist side. Pants-type disposable diaper.
PCT/JP2016/052807 2015-01-30 2016-01-29 Pants-type disposable diaper Ceased WO2016121977A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2015-017498 2015-01-30
JP2015017498A JP5980355B2 (en) 2015-01-30 2015-01-30 Stretch structure of absorbent article and pants-type disposable diaper using the same
JP2015070294A JP5918876B1 (en) 2015-03-30 2015-03-30 Pants-type disposable diaper
JP2015-070294 2015-03-30
JP2015-195457 2015-09-30
JP2015195457A JP5980399B1 (en) 2015-09-30 2015-09-30 Pants-type disposable diaper

Publications (1)

Publication Number Publication Date
WO2016121977A1 true WO2016121977A1 (en) 2016-08-04

Family

ID=56543579

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/052807 Ceased WO2016121977A1 (en) 2015-01-30 2016-01-29 Pants-type disposable diaper

Country Status (1)

Country Link
WO (1) WO2016121977A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110461288A (en) * 2017-04-03 2019-11-15 株式会社光洋 Absorbent article and method for producing absorbent article
EP3501802A4 (en) * 2016-08-19 2020-04-01 Daio Paper Corporation PROCESS FOR PRODUCING STRETCH SHEET
EP3689311B1 (en) 2017-09-27 2023-11-08 Daio Paper Corporation Elastic member, disposable wearable item using this elastic member, and method for producing elastic member

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3675676B2 (en) * 1999-06-28 2005-07-27 ユニ・チャーム株式会社 Disposable diapers
WO2008126708A1 (en) * 2007-04-10 2008-10-23 Zuiko Corporation Method of producing disposable wearing article
JP2008296585A (en) * 2008-07-08 2008-12-11 Daio Paper Corp Manufacturing method of elastic sheet, and paper diaper using it
JP4508885B2 (en) * 2005-01-20 2010-07-21 花王株式会社 Absorbent articles
JP4724587B2 (en) * 2006-03-31 2011-07-13 大王製紙株式会社 Absorbent articles
JP2012070868A (en) * 2010-09-28 2012-04-12 Daio Paper Corp Disposable diaper
JP4934835B2 (en) * 2007-04-10 2012-05-23 株式会社瑞光 Method for manufacturing laminated stretchable sheet
JP5028654B2 (en) * 2007-04-10 2012-09-19 株式会社瑞光 Laminated elastic sheet and method for producing the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3675676B2 (en) * 1999-06-28 2005-07-27 ユニ・チャーム株式会社 Disposable diapers
JP4508885B2 (en) * 2005-01-20 2010-07-21 花王株式会社 Absorbent articles
JP4724587B2 (en) * 2006-03-31 2011-07-13 大王製紙株式会社 Absorbent articles
WO2008126708A1 (en) * 2007-04-10 2008-10-23 Zuiko Corporation Method of producing disposable wearing article
JP4934835B2 (en) * 2007-04-10 2012-05-23 株式会社瑞光 Method for manufacturing laminated stretchable sheet
JP5028654B2 (en) * 2007-04-10 2012-09-19 株式会社瑞光 Laminated elastic sheet and method for producing the same
JP2008296585A (en) * 2008-07-08 2008-12-11 Daio Paper Corp Manufacturing method of elastic sheet, and paper diaper using it
JP2012070868A (en) * 2010-09-28 2012-04-12 Daio Paper Corp Disposable diaper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3501802A4 (en) * 2016-08-19 2020-04-01 Daio Paper Corporation PROCESS FOR PRODUCING STRETCH SHEET
US10869784B2 (en) 2016-08-19 2020-12-22 Daio Paper Corporation Method for manufacturing stretchable sheet
CN110461288A (en) * 2017-04-03 2019-11-15 株式会社光洋 Absorbent article and method for producing absorbent article
CN110461288B (en) * 2017-04-03 2021-03-05 株式会社光洋 Absorbent article
EP3689311B1 (en) 2017-09-27 2023-11-08 Daio Paper Corporation Elastic member, disposable wearable item using this elastic member, and method for producing elastic member

Similar Documents

Publication Publication Date Title
JP6240733B1 (en) Disposable wearing article and manufacturing method thereof
KR102519506B1 (en) Absorbent article and manufacturing method thereof
WO2016121975A1 (en) Absorbent article and method for manufacturing same
JP5967736B1 (en) Absorbent articles
JP6049228B1 (en) Absorbent articles
JP6331199B2 (en) Absorbent articles
WO2016121974A1 (en) Stretch structure for absorbent article, and underpants-type disposable diaper using same
JP5980367B1 (en) Method for manufacturing absorbent article
JP2016193199A5 (en)
JP2016193199A (en) Absorbent articles
WO2017163754A1 (en) Method for forming elastic film stretchable structure, and absorbent article
JP2017064225A5 (en)
WO2016158750A1 (en) Absorbent article and method for producing same
WO2017169381A1 (en) Underpants-type disposable diaper
JP5918877B1 (en) Absorbent article and manufacturing method thereof
JP2016185266A (en) Underpants type disposable diaper
JP6396549B1 (en) Disposable wearing items
WO2017221640A1 (en) Pants-type disposable diaper
JP6370965B1 (en) Pants-type disposable diaper
JP6360950B1 (en) Disposable wearing article and manufacturing method thereof
JP2016190031A (en) Pants-type disposable diaper
WO2016121977A1 (en) Pants-type disposable diaper
JP6137712B2 (en) Pants-type disposable diaper
JP5918876B1 (en) Pants-type disposable diaper
JP5967735B1 (en) Pants-type disposable diaper

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16743580

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16743580

Country of ref document: EP

Kind code of ref document: A1