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WO2019230982A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2019230982A1
WO2019230982A1 PCT/JP2019/021886 JP2019021886W WO2019230982A1 WO 2019230982 A1 WO2019230982 A1 WO 2019230982A1 JP 2019021886 W JP2019021886 W JP 2019021886W WO 2019230982 A1 WO2019230982 A1 WO 2019230982A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
contraction
body region
diaper
wearer
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/JP2019/021886
Other languages
English (en)
Japanese (ja)
Inventor
吉田　英聡
和泉 田代
笙子 木村
悠紀 ▲桑▼原
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.)
Oji Holdings Corp
Original Assignee
Oji Holdings 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 JP2018105359A external-priority patent/JP6662409B2/ja
Priority claimed from JP2018105360A external-priority patent/JP6662410B2/ja
Priority claimed from JP2018244832A external-priority patent/JP7519757B2/ja
Application filed by Oji Holdings Corp filed Critical Oji Holdings Corp
Priority to CN201980036198.XA priority Critical patent/CN112243369B/zh
Publication of WO2019230982A1 publication Critical patent/WO2019230982A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to an absorbent article.
  • Absorbent articles such as disposable diapers, urine pads, and sanitary products are provided with an absorber that absorbs excretory fluids such as urine and body fluids.
  • an absorber that absorbs excretory fluids such as urine and body fluids.
  • pulp for example, pulp, super absorbent polymer (SAP), or the like is used.
  • Patent Documents For example, a disposable diaper is known in which an outer layer sheet and an inner layer sheet are contracted in the circumferential direction by an elastic member to form a heel around the waist, and moisture is discharged to the outside through a gap between the heel and the wearer's skin. ing.
  • an object of the present invention is to provide an absorbent article having better air permeability than conventional ones.
  • an absorbent article includes a front body region that covers the wearer's abdomen, a back body region that covers the wearer's back, and the front body region and the back body region.
  • An absorptive article that is positioned and has a crotch region in which an absorbent body is disposed, and a torso opening portion through which a wearer's torso portion can be inserted is formed in the front body region and the back body region.
  • a first contraction part that is provided in a first region adjacent to the edge of the trunk opening and that extends along the trunk direction, and includes a first contraction part that contracts the trunk opening in the trunk direction;
  • a plurality of the first elastic members are arranged at a constant interval in one contraction part, and the interval between the first elastic members is 6.5 mm or more and 20 mm or less.
  • the distance between the first elastic members may be 6.5 mm or more and 13 mm or less.
  • the range from the trunk opening edge where the first contraction part extends in the longitudinal direction connecting the front body part and the back body part may be 26 mm or more and 31 mm or less.
  • the first contraction part may have a laminated structure in which sheet members are laminated in at least three layers.
  • a second elastic member provided in a second region adjacent to the crotch region side with respect to the first region and extending along a waistline direction among the front body region and the back body region.
  • a second contraction part that contracts the trunk opening part in the waistline direction, wherein the second contraction part is provided with a plurality of the second stretchable members, and between the second stretchable members May be set to a size smaller than the interval between the first elastic members.
  • FIG. 1 is a perspective view of a pants-type disposable diaper according to Embodiment 1.
  • FIG. 2 is an exploded perspective view of the diaper according to the first embodiment.
  • FIG. 3 is a diagram schematically illustrating a state in which the diaper according to Embodiment 1 is developed.
  • FIG. 4 is a diagram for explaining an installation mode of the ventilation path forming sheet of the diaper according to the first embodiment.
  • Drawing 5 is a figure showing typically the state where the diaper concerning a comparative example was developed.
  • FIG. 6 is a diagram for explaining the interval between the first rubber threads of the diaper according to the comparative example and the wrinkles formed in the first contraction portion.
  • FIG. 7A is a diagram illustrating wrinkles in the first contraction portion of the waist gather according to the first embodiment.
  • FIG. 7B is a diagram illustrating wrinkles in the first contraction portion of the waist gather according to the comparative example.
  • FIG. 8 is a diagram for explaining the wind speed measurement position in the air permeability quantitative test.
  • FIG. 9 is a diagram showing a mist ventilation tester used for the mist ventilation test.
  • FIG. 10A is an enlarged photograph of a ridge forming a waist gather according to an example.
  • FIG. 10B is an enlarged photograph of a ridge forming a waist gather according to a comparative example.
  • FIG. 11 is a diagram schematically illustrating a state in which the diaper according to Embodiment 2 is developed.
  • FIG. 12 is a diagram schematically illustrating a state in which the diaper according to Embodiment 3 is developed.
  • FIG. 13 is a perspective view of a pants-type disposable diaper according to the fourth embodiment.
  • FIG. 14 is an exploded perspective view of a diaper according to the fourth embodiment.
  • FIG. 15 is a diagram schematically illustrating a state in which the diaper according to Embodiment 4 is developed.
  • FIG. 16 is a diagram for explaining an installation mode of the ventilation path forming sheet of the diaper according to the fourth embodiment.
  • FIG. 17 is a diagram illustrating a portion of a joint portion where the air passage formation sheet is joined.
  • FIG. 18 is a diagram showing the magnitude of the contraction force in each contraction part.
  • FIG. 19 is a diagram for explaining wrinkles formed on the second contraction part of the waist gather and the third contraction part of the Tammy gather.
  • FIG. 15 is a diagram schematically illustrating a state in which the diaper according to Embodiment 4 is developed.
  • FIG. 16 is a diagram for explaining an installation mode of the ventilation path forming sheet of the diaper according to the fourth embodiment.
  • FIG. 17 is a
  • FIG. 20 is a diagram schematically illustrating a state in which the diaper according to the modification is developed.
  • FIG. 21 is a diagram for explaining wrinkles formed on the first contraction part and the second contraction part of the waist gathers and the third contraction part of the Tammy gathers.
  • FIG. 22 is a view showing air holes formed in the opening edge of the trunk opening when the waist gathers contract.
  • Embodiment shown below is an example of embodiment of this invention, and does not limit the technical scope of this invention to the following aspects.
  • FIG. 1 is a perspective view of a pants-type disposable diaper (hereinafter simply referred to as “diaper”) 1 according to the first embodiment.
  • FIG. 2 is an exploded perspective view of the diaper 1 according to the embodiment.
  • FIG. 3 is the figure which showed typically the state which expand
  • FIG. 3A schematically shows the internal structure of the diaper 1 when unfolded when viewed from the left side.
  • the direction used in this specification shall mean the direction which corresponds to the wearer's front and rear, right and left in the state where diaper 1 was worn by the wearer.
  • the left-right direction means a direction that matches the left and right of the wearer when the diaper 1 is worn by the wearer.
  • the “front body region” of the diaper 1 means a portion that covers the abdomen (front of the body) of the wearer when the diaper 1 is worn on the wearer.
  • the “inseam area” of the diaper 1 means a portion that covers the inseam of the wearer when the diaper 1 is worn on the wearer.
  • the “rear body region” of the diaper 1 means a portion that covers the wearer's back (back of the body) when the diaper 1 is worn on the wearer.
  • the “longitudinal direction” means a direction connecting the front body region and the back body region of the diaper 1. That is, the longitudinal direction of the diaper 1 coincides with the continuous direction in which the front body region, the crotch region, and the back body region are continuously provided.
  • the “width direction” means a direction orthogonal to the longitudinal direction of the diaper 1.
  • a pants-type disposable diaper having a tubular structure having an opening into which the wearer's abdomen enters and a pair of left and right openings through which the wearer's left lower limb and right lower limb are inserted
  • the “absorbent article” in this specification is not limited to a pants-type disposable diaper.
  • the “absorbent article” includes, for example, a tape that is fixed near one end of a sheet-like member that covers the wearer's crotch (pubic region) from the front body region to the back body region, and the other end of the sheet-like member.
  • Various types of absorbent articles that can wrap the abdominal circumference and crotch such as a tape-type disposable diaper that forms a cylindrical structure by being attached in the vicinity of the part, are included.
  • the diaper 1 includes a crotch region 1B that covers the crotch (pubic region) of the wearer, a front body region 1F that covers the abdomen of the wearer, and a back body that covers the back of the wearer. And a region 1R.
  • the crotch region 1B is located between the front body region 1F and the back body region 1R and is connected to the front body region 1F and the back body region 1R, and the crotch region 1B absorbs and holds liquid.
  • a main body 15 (absorber 8) is provided.
  • the diaper 1 in this embodiment is a pants-type disposable diaper
  • the left side edge of the front body region 1F and the left side edge of the back body region 1R are joined together, and the right side edge of the front body region 1F and the back body region 1R The right edge is joined to each other, so that the state shown in FIG. 1 is assembled.
  • a trunk opening (waist opening) 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R.
  • a left lower limb opening 2L is formed on the left side of the crotch region 1B where the joining is not performed
  • a right lower limb opening 2R is formed on the right side of the crotch region 1B.
  • the left lower limb opening 2L and the right lower limb opening 2R are openings through which the wearer's legs are inserted when the diaper 1 is worn.
  • the wearer's left lower limb is inserted into the left lower limb opening 2L
  • the wearer's right lower limb is inserted into the right lower limb opening 2R
  • the wearer's torso enters (passes through) the torso opening 2T.
  • the front body region 1F contacts the wearer's abdomen
  • the back body region 1R contacts the wearer's back side
  • the crotch region 1B is applied to the wearer's crotch
  • the left lower limb opening 2L and right lower limb opening 2R are fixed to the wearer's body in a state of surrounding the wearer's thigh. Since the diaper 1 is fixed to the wearer's body in this manner, it is possible to walk while the diaper 1 is worn.
  • an absorbent body 8 that can absorb and hold liquid is mainly disposed around the crotch region 1B. Further, in the diaper 1, in order to suppress the formation of a gap as a liquid outflow path between the diaper 1 and the wearer's skin, the left lower limb opening 2 ⁇ / b> L, the right lower limb opening 2 ⁇ / b> R, the torso opening
  • the part 2T is provided with a three-dimensional gather G1L, a three-dimensional gather G1R, and a waist gather G2, respectively.
  • the three-dimensional gathers G1L and G1R and the waist gather G2 are configured so as to be in close contact with the wearer's skin by the elastic force of the rubber thread, so that the excretory fluid discharged from the wearer is not leaked from the diaper 1. It can be made to absorb in the absorption part main body 15 (absorber 8).
  • the diaper 1 has cover sheets 4F and 4R and a pad cover sheet 6 that form an outer surface in a state worn on the wearer.
  • the cover sheet 4F is a sheet member that mainly forms the outer surface of the front body region 1F of the diaper 1.
  • the pad cover sheet 6 is a sheet member for mainly forming the outer surface of the crotch region 1B of the diaper 1.
  • the cover sheet 4R is a sheet member for mainly forming the outer surface of the rear body region 1R of the diaper 1.
  • the cover sheets 4F and 4R and the pad cover sheet 6 are provided, for example, for reinforcing the outer surface of the diaper 1 and improving the touch.
  • the cover sheets 4F and 4R and the pad cover sheet 6 can be formed of a nonwoven fabric made of, for example, a liquid-impermeable thermoplastic resin in order to suppress leakage of excrement.
  • the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP).
  • PE polyethylene
  • PP polypropylene
  • the liquid-impermeable sheet may have a large number of fine pores of about 0.1 to several ⁇ m so that the liquid-impermeable and moisture-permeable properties are exhibited.
  • the diaper 1 has the inner cover sheet 5F laminated
  • the “skin facing surface” means a surface facing the wearer's skin when the wearer wears the diaper 1.
  • the inner cover sheet 5F is a sheet member that is bonded to the cover sheet 4F in a state where a rubber thread that is a linear elastic member is sandwiched between the cover sheet 4F and the interlayer.
  • the inner cover sheet 5F is a sheet member having a shape and a size corresponding to a portion of the cover sheet 4F excluding the folded portion 4F5 described later and the waist first region RW1 in the exterior cover portion 4F10.
  • the inner cover sheet 5R is a sheet member that is bonded to the cover sheet 4F in a state in which a thread rubber that is a linear elastic member is sandwiched between the layers with the cover sheet 4R.
  • the inner cover sheet 5R is a sheet member having a shape and a size corresponding to a portion of the cover sheet 4R excluding the folded portion 4R5 described later and the waist first region RW1 in the exterior cover portion 4R10.
  • the diaper 1 of the present embodiment includes an absorbent body 15.
  • the absorbent main body 15 is held in a state of being bridged between the front body region 1F and the back body region 1R, and is placed on the inseam of the wearer when the diaper 1 is worn, and liquid such as urine excreted by the wearer. Absorb and hold.
  • the absorbent body 15 includes a pad cover sheet 6, a back sheet 7, an absorbent body 8, a center sheet 9, side sheets 10 ⁇ / b> L, 10 ⁇ / b> R, and the like, and is integrally formed by these. .
  • the back sheet 7, the absorber 8, and the center sheet 9 are laminated in order on the skin facing surface of the pad cover sheet 6.
  • the pad cover sheet 6 has a length in the longitudinal direction that reaches from the wearer's front body to the back body through the crotch, and has a rectangular plane having a predetermined lateral width in the width direction orthogonal to the longitudinal direction. It is a sheet member to have.
  • the back sheet 7, the absorbent body 8, and the center sheet 9 are all sheet members having a rectangular plane like the pad cover sheet 6, and the pad cover is in a state where the longitudinal direction coincides with the longitudinal direction of the pad cover sheet 6.
  • the sheets 6 are laminated in this order.
  • the absorber 8 is a member that absorbs liquid such as urine and holds the absorbed liquid.
  • the absorber 8 is disposed between the liquid-impermeable back sheet 7 and the liquid-permeable center sheet 9.
  • Absorbent body 8 has water in gaps between short fibers of cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by subjecting synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate to hydrophilic treatment. It may have a structure in which a granular absorbent resin such as a hydrophilic superabsorbent polymer having a cross-linked structure capable of absorbing and retaining water is retained.
  • the absorber 8 may have a single layer structure made of one mat or a laminated structure in which a plurality of mats are stacked. Moreover, the absorber 8 can employ
  • the center sheet 9 is a sheet member that directly contacts the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 8, and is laminated so as to cover the water absorption surface of the absorbent body 8.
  • the center sheet 9 in the present embodiment is formed of a highly permeable liquid permeable material. Examples of the liquid permeable material forming the center sheet 9 include a woven fabric, a nonwoven fabric, and a porous film.
  • the center sheet 9 may have hydrophilicity.
  • the back sheet 7 is a sheet member for suppressing the liquid that has passed through the center sheet 9 and absorbed by the absorber 8 from leaking to the outside of the diaper 1. For this reason, the back sheet 7 is formed of a liquid-impermeable material.
  • the liquid impermeable material forming the back sheet 7 include a liquid impermeable film made of polyethylene resin.
  • the backsheet 7 may be formed of a microporous polyethylene film in which a large number of micropores are formed in order to ensure air permeability.
  • the pad cover sheet 6 is a member for reinforcing the back sheet 7 and improving the touch thereof, and is bonded to the back sheet 7.
  • Examples of the material forming the pad cover sheet 6 include woven fabric and non-woven fabric.
  • the pad cover sheet 6 may be a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.
  • the side sheets 10L and 10R in the absorber main body 15 are elongated strip-shaped members for forming the above-described three-dimensional gathers G1L and G1R.
  • the side sheets 10 ⁇ / b> L and 10 ⁇ / b> R are extended along the long side portion of the center sheet 9. Further, thread rubbers 10L1 and 10R1 are bonded to the side sheets 10L and 10R along the longitudinal direction.
  • the left side edge 4F7 of the cover sheet 4F forming the left side edge of the front body region 1F and the left side edge 4R7 of the cover sheet 4R forming the left side edge of the back body region 1R are joined together, and the right side edge of the front body region 1F is joined When the diaper 1 shown in FIG.
  • a method for joining the side edges of the cover sheets 4F and 4R is not particularly limited, and examples thereof include heat sealing, high frequency sealing, and ultrasonic sealing.
  • the absorbent body 15 extends from the front body region 1F to the back body region 1R.
  • the cover sheet 4F has a folded portion 4F5 formed by folding the front end side inward with a fold line 4F6 as a boundary.
  • a portion of the cover sheet 4F excluding the folded portion 4F5 is referred to as an exterior cover portion 4F10.
  • the exterior cover portion 4F10 of the cover sheet 4F forms the outer surface of the diaper 1.
  • the fold line 4F6 of the cover sheet 4F forms a trunk opening edge 4F9 of the trunk opening 2T in a state where the diaper 1 is assembled.
  • the folded-back portion 4F5 in the cover sheet 4F has an extended first thread rubber 4F1 disposed between the outer cover portion 4F10 and the interlayer. Further, the front end side of the folded portion 4F5 in the cover sheet 4F is a state in which one end side in the longitudinal direction of the inner cover sheet 5F, the pad cover sheet 6, the back sheet 7 and the absorbent body 8 is sandwiched between the layers with the exterior cover portion 4F10. Thus, the absorbent body 8 is bonded in a state of being overlapped with one end portion.
  • the aspect at the time of expressing that one member and another member are overlapped is not limited to an aspect in which the members overlap each other in a state of being in full contact with each other. It is a concept including a mode in which a part of the other member and the whole of the other member overlap, or a mode in which a part of one member and the other member overlap each other.
  • the second thread rubber 4F2, the third thread rubber 4F3, and the fourth thread rubber 4F4 are arranged from the folding line 4F6 side. However, they are arranged in this order, and are bonded in a state of being sandwiched between the outer cover portion 4F10 and the inner cover sheet 5F.
  • a plurality of first thread rubbers 4F1 to 4F thread rubbers 4F4 in the cover sheet 4F are arranged in parallel, and all of them are along the width direction (the waistline direction) of the cover sheet 4F. It is extended.
  • the cover sheet 4R also has a folded portion 4R5 formed by folding the front end side inward with the fold line 4R6 as a boundary.
  • a portion of the cover sheet 4R excluding the folded portion 4R5 is referred to as an exterior cover portion 4R10.
  • the exterior cover portion 4R10 of the cover sheet 4R forms the outer surface of the diaper 1.
  • the folding line 4R6 of the cover sheet 4R forms a trunk opening edge 4R9 of the trunk opening 2T in a state where the diaper 1 is assembled.
  • the extended first thread rubber 4R1 is disposed between the outer cover portion 4R10 and the interlayer.
  • the other end side of the inner cover sheet 5R, the pad cover sheet 6, the back sheet 7, and the absorbent body 8 in the longitudinal direction is sandwiched between the outer cover part 4R10 and the front end side of the folded portion 4R5 in the cover sheet 4R. In the state, it is bonded in a state of being overlapped with the other end portion of the absorber 8.
  • the second thread rubber 4R2, the third thread rubber 4F3, and the fourth thread rubber 4R4 from the folding line 4R6 side are arranged in this order, and are bonded in a state of being sandwiched between the outer cover portion 4R10 and the inner cover sheet 5R.
  • a plurality of first rubber threads 4R1 to 4R4 in the cover sheet 4R are arranged in parallel, each along the width direction (the waistline direction) of the cover sheet 4R. It is extended.
  • the waist area RW of the diaper 1 is an area where the waist gathers G2 are formed in the vicinity of the trunk opening edges 4F9 and 4R9 forming the trunk opening 2T.
  • a region where the first rubber threads 4F1 and 4R1 are disposed is referred to as a “waist first region RW1” (first region), and a region where the second rubber rubbers 4F2 and 4R2 are disposed. Is referred to as “waist second region RW2” (second region).
  • an area where the third thread rubbers 4F3 and 4R3 and the fourth thread rubbers 4F4 and 4R4 are arranged is referred to as a “tammy area RT”.
  • the Tammy region RT is a region located below the waist region RW.
  • the region where the third rubber threads 4F3, 4R3 are disposed is referred to as “tammy first region RT1”, and the region where the fourth rubber rubbers 4F4, 4R4 are disposed is referred to as “tammy second region RT2.
  • the first rubber threads 4F1 and 4R1 in the waist first region RW1 are applied with an adhesive in an expanded state in the assembly process of the diaper 1, for example, and then the exterior cover portions 4F10 and 4R10 and the folded portions 4F5 are applied. By being sandwiched between 4R5, it adheres between these layers.
  • the second thread rubbers 4F2 and 4R2 in the waist second region RW2 and the third thread rubbers 4F3 and 4R3 and the fourth thread rubbers 4F4 and 4R4 in the tammy region RT are expanded in the assembly process of the diaper 1, for example. After the adhesive is applied in this state, it is bonded between the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R by being sandwiched between them.
  • the first rubber threads 4F1 and 4R1 in the waist first region RW1 that are sandwiched and bonded between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are contracted.
  • the portion corresponding to the waist first region RW1 of the exterior cover portions 4F10, 4R10 and the folded portions 4F5, 4R5 is continuously bent in a pleated shape to follow the waist first region RW1 in the waistline direction.
  • a first contraction portion S1 that contracts is formed.
  • the exterior follows the shrinkage.
  • the second contraction that contracts the waist second region RW2 in the waistline direction by continuously bending the portion corresponding to the waist second region RW2 in a pleated shape. Part S2 is formed.
  • the waist gather G2 is formed mainly by the first contraction portion S1 formed in the waist first region RW1 and the second contraction portion S2 formed in the waist second region RW2.
  • the waist gather G2 improves the fit of the diaper 1 around the wearer's waist by the contraction force of the first thread rubber 4F1, 4R1 and the second thread rubber 4F2, 4R2.
  • first contraction portion S1 of the waist gather G2 three first rubber threads 4F1 and 4R1 are arranged in parallel with each other at a constant interval A1.
  • a plurality of second rubber threads 4F2 and 4R2 are provided in the second contraction portion S2 of the waist gather G2 in parallel with each other and at a constant interval A2.
  • the interval A1 between the first thread rubbers 4F1 and 4R1 in the first contraction portion S1 is set to be larger than the interval A2 between the second thread rubbers 4F2 and 4R2 in the second contraction portion S2. Therefore, the first contraction portion S1 ensures the moisture discharging function of discharging the moisture in the internal space of the diaper 1 to the outside and the function of easily expanding the trunk opening 2T.
  • the 2nd contraction part S2 of waist gathers G2 raises the contraction force in the circumference direction of the waist compared with the 1st contraction part S1, and the position maintenance function (displacement suppression) which controls slippage at the time of wearing of the diaper 1 Function).
  • interval of thread rubber here means the dimension which spaces apart adjacent thread rubber in the longitudinal direction (direction which connects a front body area
  • the first rubber bands 4F1 and 4R1 in the first waist region RW1 and the second rubber bands 4F2 and 4R2 in the second waist region RW2 extend over the entire width section of the cover sheets 4F and 4R. ing. Therefore, after the diaper 1 is completed, the first rubber threads 4F1 and 4R1 and the second rubber threads 4F2 and 4R2 form a substantially annular elastic member that circulates along the trunk opening 2T. In other words, after the diaper 1 is completed, the waist gather G2 (the first contraction part S1 and the second contraction part S2) is formed over the entire circumference in the waistline direction.
  • the third rubber threads 4F3 and 4R3 which are sandwiched and bonded in an extended state between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are contracted.
  • the portion corresponding to the first tammy region RT1 is continuously bent in a pleated shape, so that A third contraction portion S3 that contracts one region RT1 in the waistline direction is formed.
  • contraction part S3 is an area
  • the fourth thread rubbers 4F4 and 4R4 which are sandwiched and bonded in an extended state between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are also provided.
  • the portion corresponding to the Tammy second region RT2 of the exterior cover portions 4F10, 4R10 and the inner cover sheets 5F, 5R in the cover sheets 4F, 4R continuously bends in a pleated shape.
  • a fourth contraction portion S4 that contracts the Tammy second region RT2 in the waistline direction is formed.
  • a Tammy gather G3 is formed mainly by the third contraction part S3 formed in the Tammy first region RT1 and the fourth contraction part S4 formed in the Tammy second region RT2.
  • the Tammy Gather G3 improves the fit of the diaper 1 around the lower abdomen of the wearer, for example, by the contraction force of the third rubber threads 4F3 and 4R3 and the fourth rubber threads 4F4 and 4R4.
  • the thread rubbers 4F1, 4R1, 4F2, 4R2, 4F3, 4R3, 4F4, 4R4 are attached to the cover sheets 4F, 4R.
  • “linear” represents an elongated shape extending in a specific direction, and is a concept including a strip shape and a strip shape.
  • natural rubber, synthetic rubber, etc. can be illustrated as a material of thread rubber, However, It is not limited to a specific material.
  • the air passage forming sheets 11F and 11R of the diaper 1 will be described.
  • the diaper 1 straddles the folded end portions 4F5 and 4R5 in the cover sheets 4F and 4R, and the end regions in the longitudinal direction of the pad cover sheet 6 and the center sheet 9 in the absorbent body 15.
  • the folded-back portions 4F5 and 4R5 and the pad cover sheet 6 are provided with the air passage forming sheets 11F and 11R stacked on the skin.
  • the ventilation path forming sheets 11F and 11R form a skin contact surface in the waist gather G2 of the diaper 1.
  • the “skin contact surface” means a surface that directly contacts the wearer's skin when the diaper 1 is worn, that is, the innermost surface of the diaper 1.
  • FIG. 4 is a diagram illustrating an installation mode of the air passage forming sheets 11F and 11R of the diaper 1 according to the embodiment.
  • (A) of FIG. 4 is a figure which shows the state which looked at 1st contraction part S1 of waist gathers G2 from the internal space side of the diaper 1.
  • FIG. Moreover, (B) of FIG. 4 is a figure which shows typically the internal structure in 1st contraction part S1 of the waist gather G2 at the time of seeing from the side of the diaper 1.
  • (C) of FIG. 4 is a figure which shows the state which looked at 1st contraction part S1 of waist gathers G2 from the upper direction (namely, A arrow direction of (B)) of the diaper 1.
  • FIG. 4A and 4C show a state before the first contraction portion S1 of the waist gather G2 contracts for convenience.
  • (D) of FIG. 4 is a figure which shows the state which looked at 1st shrinkage
  • the ventilation path forming sheets 11F and 11R are laminated and arranged so as to cover at least a part of the folded portions 4F5 and 4R5 forming the skin facing surface in the first contraction portion S1 of the waist first region RW1. Are joined to the end region in the longitudinal direction of the pad cover sheet 6 and the folded portions 4F5 and 4R5.
  • the folded portions 4F5 and 4R5 of the cover sheets 4F and 4R formed of the thermoplastic resin and the air passage forming sheets 11F and 11R superimposed on the pad cover sheet 6 are joined by ultrasonic welding, thereby joining. Part S is formed. As shown in FIG.
  • a plurality of joints S are intermittently arranged along the longitudinal direction perpendicular to the trunk direction (width direction) from the trunk opening edges 4F9, 4R9 of the cover sheets 4F, 4R.
  • the linear junction part SL extended in the longitudinal direction of the diaper 1 is formed.
  • one linear joint portion SL is formed as an assembly of a plurality of joint portions S that are intermittently arranged along the longitudinal direction of the diaper 1.
  • “intermittently” means an aspect of being discontinuously or intermittently arranged.
  • a plurality of linear joints SL are intermittently provided along the waistline direction (width direction) of the cover sheets 4F and 4R in the first contraction part S1 of the waist gather G2.
  • the linear joint portions SL are provided in parallel to each other, and the intervals between the linear joint portions SL are set to be alternately large and small.
  • the linear joints SL are intermittently arranged in such a manner that double lines formed by a set of linear joints SL are arranged at equal intervals in the waistline direction (width direction).
  • FIG. 3 (A) the range which the linear junction part SL extends in the longitudinal direction of the diaper 1 is shown by hatching. As illustrated, the linear joint portion SL extends across the waist first region RW1 where the first contraction portion S1 is formed and the waist second region RW2 where the second contraction portion S2 is formed.
  • the ultrasonic bonding of the air passage forming sheets 11F and 11R to the folded portions 4F5 and 4R5 and the like is performed in a state where the first thread rubbers 4F1 and 4R1 and the second thread rubbers 4F2 and 4R2 of the waist gather G2 are in the extended state.
  • the first thread rubbers 4F1, 4R1 and the second thread rubbers 4F2, 4R2 that are sandwiched and fixed between the sheet layers are stretched. Canceled.
  • the waist gather G2 contracts, so that the interval between the linear joint portions SL in the air passage forming sheets 11F and 11R is narrowed.
  • the folded portions 4F5, 4R5 of the cover sheets 4F, 4R and the non-bonded regions 110 in the air passage forming sheets 11F, 11R are separated from each other, and as shown in FIG. A first air passage 111 surrounded by the non-joining regions 110 of the air passage forming sheets 11F and 11R is formed.
  • the 2nd ventilation path 112 can be formed in the skin contact surface 11a side of the ventilation path formation sheets 11F and 11R.
  • Reference sign SS indicated by a two-dot chain line in FIG. 4 (D) indicates the skin surface in contact with the air passage forming sheets 11F and 11R as a virtual line when the diaper 1 is worn by the wearer.
  • the second air passage 112 is formed as a gap formed between the skin contact surface 11a of the air passage forming sheets 11F and 11R and the skin of the wearer when the diaper 1 is worn by the wearer. Moisture in the internal space of the diaper 1 can be discharged to the outside through the first air passage 111 and the second air passage 112 formed in the waist gather G2.
  • the 1st ventilation path 111 is a ventilation path through which the moisture which permeate
  • the second ventilation path 112 is a ventilation path that directly communicates the internal space and the external space of the diaper 1, and can discharge the moisture in the diaper 1 more smoothly.
  • first contraction portion S1 As shown in FIG. 4D, after the shrinkage of the waist gather G2, there are a relatively large first ridge 41 and a relatively small second ridge 42 forming the first contraction portion S1. It is formed alternately.
  • the relatively large first ridges 113 and the relatively small second ridges 114 are alternately formed in the air passage forming sheets 11F and 11R that are bent and deformed in the waveform. This is due to the fact that the intervals between the linear joint portions SL are set to be alternately large and small. That is, a large first rod 41, 113 is formed by a set of linear joints SL having a large interval, and a small second rod 42, 114 is formed by a set of linear junctions SL having a small interval.
  • the first ridge 113 of the airflow passage forming sheets 11F and 11R that are bent and deformed in a waveform is to cooperate with the first ridge 41 that forms the first contraction portion S1 in order to secure a large first airflow passage 111.
  • the second ridge 114 of the ventilation path forming sheets 11F and 11R cooperates with the second ridge 42 forming the first contraction portion S1 to form the first ventilation path 111 and in the waistline direction (width direction). This contributes to properly separating the adjacent first flanges 113 and securing a ventilation cross section of the second ventilation path 112.
  • the flute structure formed by the airflow passage forming sheets 11F and 11R that deforms into a corrugated shape following the contraction of the first contraction part S1 is provided on the skin contact surface side of the waist gather G2.
  • the moisture in the diaper 1 can be efficiently discharged to the outside through the first air passage 111 and the second air passage 112.
  • the linear junction part SL is formed as an aggregate
  • the adjacent first ventilation paths 111 are communicated with each other. Therefore, it is possible to improve the air permeability between the adjacent first air passages 111 and make it difficult for the wearer to receive a local feeling of stuffiness.
  • the ventilation path forming sheets 11F and 11R in the present embodiment are provided with a large number of fine ventilation holes 11F1 and 11R1 for ventilation.
  • the air hole means an opening that allows communication between the space on one side of the sheet and the space on the other side, and the shape thereof is not particularly limited. Therefore, as the vent holes 11F1 and 11R1, for example, openings having a shape such as a circle, an ellipse, and a polygon (triangle, square, etc.) can be applied.
  • the formation of the air holes 11F1, 11R1 in the air passage forming sheets 11F, 11R does not mean that the air passage forming sheets 11F, 11R are a material having no air permeability, and the air passage forming sheets 11F, 11R, 11R may be either a breathable material or a non-breathable material.
  • the air passage forming sheets 11F and 11R are preferably made of a material having air permeability and liquid permeability, but may be a non-breathable material, for example.
  • the size and the number of the vent holes 11F1 and 11R1 are not particularly limited. For example, if the opening area is 0.5 to 10 mm 2 , about 5 to 200 are preferably formed.
  • the diaper 1 which concerns on this embodiment makes the 1st contraction part S1 located in the trunk
  • the installation mode of the second rubber threads 4F2 and 4R2 (second elastic members) to be arranged is made different.
  • the first contraction portion S1 by setting the interval A1 between the first rubber threads 4F1 and 4R1 in the first contraction portion S1 to be larger than the interval A2 between the second yarn rubbers 4F2 and 4R2 in the second contraction portion S2, the first contraction portion.
  • the moisture discharge function in S1 and the slip-off suppressing function in the second contraction portion S2 are compatible.
  • the present inventors have arranged the first rubber threads 4F1 and 4R1 forming the first contraction part S1 at a constant interval, and the interval A1 is 6.5 mm or more and 20 mm or less.
  • the breathability and ease of attachment / detachment of the waist gather G2 in the diaper 1 can be improved as compared with the prior art, and in particular, setting the interval A1 to 6.5 mm or more and 13 mm or less From the viewpoint of improving air permeability and ease of attachment / detachment, it has been found that it is more preferable.
  • the effect of the diaper 1 which concerns on Embodiment 1 is demonstrated by contrasting the diaper 1 which concerns on Embodiment 1 and the diaper 101 which concerns on a comparative example.
  • FIG. 5 is a diagram schematically showing a state in which the diaper 101 according to the comparative example is unfolded.
  • A) of FIG. 5 has shown typically the internal structure at the time of seeing the diaper 101 at the time of expansion
  • B) of FIG. 5 has shown typically the planar structure of the diaper 101 at the time of expansion
  • the diaper 101 which concerns on a comparative example is the same as the diaper 1 which concerns on Embodiment 1 shown by FIG. 3 etc. except the point from which the number and space
  • the first rubber threads 4F1 and 4R1 extend in the left-right direction along the trunk opening edges 4F9 and 4R9 of the cover sheets 4F and 4R, respectively.
  • Five first rubber bands 4F1 and 4R1 of the diaper 101 according to the comparative example are arranged in parallel with a predetermined distance B1 therebetween.
  • the distance B1 between the first thread rubbers 4F1 and 4R1 of the diaper 101 according to the comparative example is smaller than the distance A1 between the first thread rubbers 4F1 and 4R1 in the diaper 1 according to the first embodiment.
  • the interval B1 between the first rubber threads 4F1 and 4R1 of the diaper 101 according to the comparative example is set to 5 mm.
  • FIG. 6 is a diagram for explaining the gap B1 between the first rubber threads 4F1 and 4R1 of the diaper 101 according to the comparative example and the wrinkles formed in the first contraction portion S1.
  • 6A to 6D correspond to FIGS. 4A to 4D, respectively.
  • (A) of Drawing 6 is a figure showing the state which looked at waist gather G2 (1st contraction part S1) in waist 1st field RW1 from the internal space side of diaper 101 about diaper 101 of a comparative example.
  • (B) of FIG. 6 is a figure which shows typically the internal structure in waist gather G2 (1st contraction part S1) in waist 1st area
  • FIG. 6 is a figure which shows the state which looked at waist 1st area
  • FIG. 6A and 6C show a state before the waist gather G2 (first contraction portion S1) in the waist first region RW1 is contracted for convenience.
  • (D) in FIG. 6 is a figure which shows the state which looked at the diaper 101 from upper direction in the state which waist gather G2 (1st contraction part S1) contracted.
  • 41 and the size of the second ridge 42 are larger in the diaper 1 according to the first embodiment than in the diaper 101 according to the comparative example. The reason is as follows.
  • FIG. 7A is a diagram illustrating wrinkles in the first contraction portion S1 of the waist gather G2 in the first embodiment.
  • (A) of FIG. 7A is a figure which shows typically the state which looked at the wrinkles in 1st contraction part S1 of Embodiment 1 from the front.
  • FIG. 7B is a diagram schematically illustrating a state in which the eyelids in the first contraction portion S1 of the first embodiment are viewed from the side surface.
  • FIG. 7B is a diagram illustrating wrinkles in the first contraction portion S1 of the waist gather G2 according to the comparative example.
  • FIG. 7B is a diagram schematically illustrating a state in which the eyelids in the first contraction portion S1 of the comparative example are viewed from the front.
  • (B) of Drawing 7B is a figure showing typically the state where the eyelid in 1st contraction part S1 of a comparative example was seen from the side.
  • first thread rubbers 4F1 and 4R1 provided in the first contraction part S1 are bonded to the exterior cover parts 4F10 and 4R10 and the folded parts 4F5 and 4R5 of the cover sheets 4F and 4R, the first thread rubber 4F1.
  • 4R1 cover sheets 4F, 4R first and second ribs 41, 42, and air passage forming sheets 11F, 11R first flange 113 and second flange 114 are first thread rubber 4F1, The closer the distance from 4R1, the higher the degree of restraint by the first rubber threads 4F1 and 4R1.
  • the distance A1 between the first thread rubbers 4F1 and 4R1 of the diaper 1 according to the first embodiment is wider than the distance B1 between the first thread rubbers 4F1 and 4R1 of the diaper 101 according to the comparative example. Therefore, in the diaper 1 of the first embodiment, the first ridge 41 and the second ridge 42 of the cover sheets 4F and 4R and the first ridge 113 and the second ridge 114 of the air passage forming sheets 11F and 11R are the diapers 101 of the comparative example. Compared to the above, it is difficult to receive the restraining force of the first rubber threads 4F1 and 4R1 as a whole.
  • the diaper 1 of Embodiment 1 includes the first ridge 41 and the second ridge 42 of the cover sheets 4F and 4R, the first ridge 113 and the first ridge 113 of the ventilation path forming sheets 11F and 11R. It becomes possible to enlarge 2 ⁇ 114.
  • size of the 1st collar 41 and the 2nd collar 42 formed in the 1st contraction part S1 of waist gathers G2 Since the height can be increased, the ventilation area of the first ventilation path 111 can be further increased.
  • size of the 1st ridge 113 and the 2nd ridge 114 formed in the ventilation path formation sheet 11F, 11R is enlarged. Can do. Thereby, the ventilation area of the 1st ventilation path 111 and the 2nd ventilation path 112 can be enlarged further. From the above, according to the diaper 1 according to the embodiment, moisture in the diaper 1 can be discharged more smoothly.
  • the diaper 1 is compressed from the outside when the wearer takes a sitting position, and the diaper 1 is deformed by the movement of the leg when the wearer walks.
  • moisture in the diaper 1 can be discharged to the external space through the first air passage 111 and the second air passage 112, and the internal space of the diaper 1 can be made a comfortable environment.
  • emission of moisture from the inside of a diaper with the compression deformation of the diaper 1 compared with the comparative example, the 1st collar 41 and the 2nd collar 42 of cover sheet 4F, 4R, and ventilation path formation By combining with the installation mode of the first rubber threads 4F1 and 4R1 in the first contraction part S1, which contributes to increasing the first ridges 113 and the second ridges 114 of the sheets 11F and 11R, the breathability of the waist gather G2 is increased. It is possible to obtain a synergistic effect that can be improved more remarkably.
  • the 1st contraction part S1 which forms waist gather G2 is extended from the trunk
  • the torso opening 2T when the torso opening 2T is widened, if the fingertip side of the first joint of the finger is positioned on the torso opening edges 4F9 and 4R9, the torso opening is being performed while the torso opening 2T is being widened. It becomes easy for a fingertip to come off from the end edges 4F9, 4R9 unexpectedly.
  • the torso opening 2T when expanding the torso opening 2T, if the base part of the finger deeper than the second joint is located at the torso opening edge 4F9, 4R9, the second position is located below the first contraction part S1. 2 The contraction part S2 is expanded, and it is difficult to efficiently expand the trunk opening 2T.
  • the easiness of attachment / detachment of the diaper 1 can be improved by setting the extending length of the first contraction part S1 along the longitudinal direction of the diaper to be not less than 26 mm and not more than 31 mm. Further, when the diaper 1 is spread, the tips of the fingers do not bite into the air passage forming sheets 11F and 11R that form the skin contact surface of the waist gather G2 of the diaper 1, and the air passage forming sheets 11F and 11R are damaged. There is also an advantage that this can be suppressed.
  • the first contraction portion S1 has a laminated structure in which the sheet members are laminated in at least three layers. According to this, when putting the diaper 1 on the baby (wearer), even when the operator's finger enters between the first rubber bands 4F1 and 4R1 arranged in the first contraction part S1, It can suppress that a tear generate
  • the width dimension which 2nd contraction part S2 extends to a diaper longitudinal direction shall be 10 mm or more.
  • variety to the diaper longitudinal direction of 2nd contraction part S2 shall be 26 mm or less.
  • a diaper corresponding to an example of the diaper 1 according to the embodiment and a diaper corresponding to the diaper 101 according to the comparative example are prepared, and a breathability quantitative test, a mist ventilation test, and a widening strength test are performed on each diaper. Etc. were carried out.
  • a diaper corresponding to an example of the diaper 1 according to the embodiment is referred to as an “example”, and a diaper corresponding to the diaper 101 of the comparative example is referred to as a “comparative example”.
  • FIG. 8 is a diagram for explaining the wind speed measurement position in the air permeability quantitative test.
  • wind speed As a test condition, when a diaper to be tested is attached to a dummy doll and air is injected at 20 L / min from the inseam of the dummy doll, the speed of the air discharged from the inside of the diaper (wind speed) is It measured with the wind speed measuring device.
  • a commercially available hot-wire anemometer manufactured by Testo Co., Ltd., product number: testo425, wind speed resolution: 0.01 m / s
  • Table 1 shows various specifications of the examples and comparative examples.
  • the number of samples to be used for the test three types of Big size, L size, and M size were prepared for each of Examples 1 to 3 and Comparative Examples 1 to 3, respectively.
  • interval of 1st thread rubber 4F1 and 4R1 which form 1st contraction part S1 in waist gather G2 show a draft rate in a table
  • the waist gather G2 was provided with an air passage forming sheet.
  • the comparative example 3 set it as the specification which does not provide a ventilation path formation sheet in waist gather G2.
  • the wind speed was measured at five locations A to E having different vertical separation distances from the edge of the trunk opening at the center in the width direction of the back body part of the diaper. It was measured.
  • the up-down direction here is a direction orthogonal to the width direction along the exterior surface of a diaper.
  • the measurement position A was 1 cm above the edge of the trunk opening.
  • the measurement positions B to E are located below the trunk opening edge, and the separation distances from the trunk opening edge are 0.5 cm, 1.5 cm, 2.5 cm, and 3. It was 5 cm.
  • the wind speed measurement probe is held in a vertical position with respect to the outer surface (cover sheet surface) of the diaper, and the wind speed is measured with the tip of the probe facing the outer surface of the diaper. Carried out.
  • the probe of the wind speed measuring device was held in a posture along the back of the dummy doll, and the tip of the probe was opposed to the gap between the back of the dummy doll and the waist gathers of the diaper. The wind speed was measured in the state.
  • Table 2 shows the results of the breathability quantitative test.
  • Measured position A is considered to be dominated by the flow of air that leaks outside through the gap between the waist gather G2 and the skin of the dummy doll. Accordingly, considering the measurement results of the wind speed at the measurement position A for each example and each comparative example, as shown in Table 2, Example 1 (yarn rubber interval 6.5 mm), Example 2 (yarn rubber interval 13 mm) ) And Example 3 (thread rubber interval 20 mm), the wind speed is remarkably increased as compared with Comparative Example 1 (thread rubber interval 5 mm) and Comparative Example 3 (thread rubber interval 5 mm, no air passage forming sheet). Results were obtained. Therefore, it can be said that Examples 1 to 3 have significantly improved air permeability of the waist gather G2 compared to Comparative Examples 1 and 3.
  • the air permeability of the waist gather G2 can be improved by securing the interval between the first rubber threads 4F1 and 4R1 forming the first contraction part S1 in the waist gather G2 to 6.5 mm or more.
  • measurement positions B to E no significant difference was observed between each example and each comparative example.
  • Table 2 also shows sensory evaluation results regarding ease of attachment / detachment (easy to attach / detach) of Examples and Comparative Examples.
  • the sensory evaluation was evaluated by five evaluators. Out of 5 evaluators, 4 or more responded as good, rated as ⁇ , 3 as good as ⁇ , and 2 or less as good as x did.
  • Comparative Example 1 and Comparative Example 3 in which the interval between the thread rubbers in the waist gather G2 is set to 5 mm, the thread rubber in the waist gathers G2 has a high contraction force, and the waist rubber G2 stretches when the diaper is worn. I needed a lot of power.
  • Comparative Example 2 in which the gap between the rubber bands in the waist gather G2 was set to 25 mm resulted in the fingers not being caught because the gap between the rubber bands was too wide. From this, it can be said that it is preferable that the distance between the rubber threads of the waist gather G2 is 20 mm or less from the viewpoint of easy attachment / detachment of the diaper. Further, in Comparative Example 2, the breathability of Examples 1 to 3 and waist gather G2 was substantially the same, but Comparative Example 2 was inferior to Examples 1 to 3 in terms of ease of attaching / detaching diapers.
  • the interval between the first thread rubbers 4F1 and 4R1 forming the first contracted portion S1 in the waist gather G2 is 6. It can be evaluated that setting to 5 mm or more and 20 mm or less is preferable.
  • the breathability of the waist gather G2 is substantially the same, but the diaper easy attachment / detachment is the same as in Example 3 (yarn rubber interval 6. mm) compared to Example 3 (yarn rubber interval 20 mm). 5 mm) and Example 2 (13 mm rubber thread spacing) were even better.
  • setting the interval between the first rubber threads 4F1 and 4R1 forming the first contracted portion S1 in the waist gather G2 to 6.5 mm to 13 mm improves the breathability and ease of attachment and removal of the waist gather G2. Therefore, it can be said that it is particularly preferable.
  • mist aeration test is performed using a mist aeration test machine 200 shown in FIG. 9, in which a diaper to be tested (Example 1 and Comparative Example 1) is attached to a diaper attachment portion 202 having a mist injection outlet 201.
  • a diaper to be tested Example 1 and Comparative Example 1
  • mist injection outlet 201 When air containing a constant amount of mist (flow rate 5 m / min) was continuously sent out for 15 seconds, the state of mist passing through the diaper waist gathers was visually observed.
  • the mist outlet 201 has a rectangular shape with a vertical dimension of 25 mm and a horizontal dimension of 25 mm, and a diaper to be tested is attached to the diaper attachment portion 202 so that the waist gather G2 is positioned in front of the mist outlet 201.
  • the test was conducted.
  • FIG. 9 shows a state in which mist is ejected from the mist ejection port 201 in a state where the diaper is not attached to the diaper attachment part 202.
  • Example 1 has more mist leaking from the waist gathers in the longitudinal direction than Comparative Example 1.
  • Comparative Example 1 since the space
  • FIG. 10A is an enlarged photograph of a ridge forming a waist gather according to an example.
  • FIG. 10B is an enlarged photograph of a ridge forming a waist gather according to a comparative example. Comparing the example and the comparative example, it can be seen that the size of the wrinkles forming the waist gathers is larger in the example than in the comparative example. In other words, it can be said that the air permeability of the waist gather is better in the example than in the comparative example.
  • the first contraction portion S1 is provided in the waist first region RW1 adjacent to the waist opening edges 4F9, 4R9 and is extended along the waistline direction. 4R1 is included, and the trunk opening is contracted in the trunk circumference direction.
  • the second contraction portion S2 includes second thread rubbers 4F2 and 4F2 provided in the waist second region RW2 adjacent to the crotch region 1B side with respect to the first contraction portion S1 and extending along the waistline direction, The trunk opening is contracted in the trunk circumference direction.
  • the 1st contraction part S1 which forms waist gather G2 is extended from the trunk
  • the torso opening 2T when the torso opening 2T is widened, if the fingertip side of the first joint of the finger is positioned on the torso opening edges 4F9 and 4R9, the torso opening is being performed while the torso opening 2T is being widened. It becomes easy for a fingertip to come off from the end edges 4F9, 4R9 unexpectedly.
  • the torso opening 2T when expanding the torso opening 2T, if the base part of the finger deeper than the second joint is located at the torso opening edge 4F9, 4R9, the second position is located below the first contraction part S1. 2 The contraction part S2 is expanded, and it is difficult to efficiently expand the trunk opening 2T.
  • the easiness of attachment / detachment of the diaper 1 can be improved by setting the extending length of the first contraction part S1 along the longitudinal direction of the diaper 1 to 26 mm or more and 31 mm or less. Further, the first contraction portion S1 requires less force (widening strength) to extend in the lateral direction than the second contraction portion S2. Thereby, the ease of attachment or detachment of the diaper 1 can be improved more. Further, when the diaper 1 is spread, the tips of the fingers do not bite into the air passage forming sheets 11F and 11R that form the skin contact surface of the waist gather G2 of the diaper 1, and the air passage forming sheets 11F and 11R are damaged. There is also an advantage that this can be suppressed.
  • the first contraction portion S1 has a laminated structure in which the sheet members are laminated in at least three layers. According to this, when the baby (wearer) puts on the diaper 1, even when the operator's finger enters between the rubber bands 4F2 and 4R2 arranged in the first contraction part S1, the first It can suppress that a tear generate
  • interval A2 a predetermined interval
  • the second contraction portion S2 preferably exhibits a function of suppressing the displacement of the diaper 1 from falling off. be able to. That is, as a whole of the waist gather 3R, the diaper 1 can be suitably prevented from slipping while exhibiting a moisture discharging function of discharging moisture in the internal space of the diaper 1 to the outside.
  • the width dimension in which the second contraction portion S2 extends in the diaper longitudinal direction is preferably 20 mm or more.
  • variety to the diaper longitudinal direction of 2nd contraction part S2 shall be 40 mm or less.
  • the range from 4R9, 4R9 in which the first contraction part S1 extends in the longitudinal direction is 31 mm
  • the cylinder opening edge 4F9, in which the second contraction part S2 extends in the longitudinal direction The range from 4R9 is 31 mm or more and 71 mm or less.
  • the range from 4R9, 4R9 in which the first contraction part S1 extends in the longitudinal direction is 26 mm
  • the cylinder opening edge 4F9, in which the second contraction part S2 extends in the longitudinal direction The range from 4R9 is 26 mm or more and 66 mm or less.
  • the width dimension in which the second contraction portion S2 extends in the longitudinal direction of the diaper is 20 mm or more and 40 mm or less, and the range from the body opening edge 4F9, 4R9 in which the second contraction portion S2 extends in the longitudinal direction is 26 mm or more. 71 mm or less.
  • the first contraction part S1 and the second contraction part S2 may be adjacent to each other.
  • the diaper 1 makes 2nd contraction part S2 respond
  • the second contraction portion S2 can be held on the wearer's waist by being positioned in the vicinity.
  • a diaper corresponding to an example of the diaper 1 of the present embodiment and a diaper corresponding to the diaper 101 of the comparative example in the same manner as described above were prepared, and the diaper slip-off suppressing function was evaluated.
  • a prototype diaper corresponding to an example of the diaper 1 of the second embodiment is hereinafter referred to as an “example”.
  • a comparative diaper corresponding to the diaper 101 of the comparative example is hereinafter referred to as “comparative example”.
  • “Loika HS 470 dtex” is used as the thread rubber corresponding to the thread rubber 4F2 and 4R2 and the thread rubber corresponding to the thread rubber 4F3, 4R3, 4F4, and 4R4 is “ Roika CR 470 dtex "is used.
  • the draft rate of the thread rubber corresponding to the thread rubbers 4F2 and 4R2 is 345%
  • the draft ratio of the thread rubber corresponding to the thread rubbers 4F3 and 4R3 is 315%, which corresponds to the thread rubbers 4F4 and 4R4.
  • the draft of the rubber thread is 330%.
  • the draft rate of the thread rubber corresponding to the thread rubbers 4F2 and 4R2 is 345%
  • the draft rate of the thread rubber corresponding to the thread rubbers 4F3 and 4R3 is 285%, which corresponds to the thread rubbers 4F4 and 4R4.
  • the draft of the rubber thread is 285%.
  • the symbol “ ⁇ ” described in the “Example” column indicates the result of no slippage.
  • the symbol “ ⁇ ” described in the “Example” and “Comparative Example” columns indicates the result of almost no deviation.
  • the symbol “x” described in the column “Comparative Example” indicates a result of the deviation.
  • the diaper according to the example has a function of suppressing dropping over time more than the diaper according to the comparative example.
  • Experiment 2 evaluated the slip-off suppressing function when the baby was staggered. Specifically, a dummy doll in a sitting position with a diaper worn on a mat made of EVA (ethylene-vinylate copolymer) was placed, and 150 cc of artificial urine was absorbed and held in the diaper. The dummy doll weighs 4 kg and has a size corresponding to the L size of an infant. Artificial urine was prepared by dissolving 20 g of urea, 8 g of sodium chloride, 0.8 g of magnesium sulfate heptahydrate, and 0.3 g of calcium chloride dihydrate in 1000 mL of distilled water.
  • EVA ethylene-vinylate copolymer
  • the displacement width at the stomach was 5 cm, and the displacement width at the flank was 0 cm.
  • the slipping width at the stomach was 20 cm, and the slipping width at the flank was 10 cm.
  • the diaper according to the example has a function of suppressing the dropping of the diaper according to the comparative example. Thereby, even if it is a case where a wearer's baby is staggered, the diaper 1 can suppress slipping off.
  • the diaper 1 which concerns on this embodiment is easy to attach or detach, and can suppress slippage. For this reason, the diaper 1 according to the present embodiment is suitable for a baby before biped walking.
  • the diaper 1 which concerns on this embodiment has the same component as the diaper which concerns on Embodiment 1 mentioned above.
  • the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 11 is a diagram schematically illustrating a state where the diaper 1 according to the second embodiment is expanded and extended.
  • A) of FIG. 11 has shown typically the internal structure at the time of seeing the diaper 1 of the state expand
  • B) of FIG. 11 has shown typically the top view of the diaper 1 of the state expand
  • the longitudinal end portion of the absorbent body 8 is in contact with the first contraction portion S1.
  • the longitudinal end portion of the absorbent body 8 extends to the end portion of the first contraction portion S1.
  • the first contraction portion S1 is provided in the waist first region RW1 adjacent to the waist opening edges 4F9 and 4R9 and extends along the waistline direction. 4F1 and 4R1 are included, and the trunk opening is contracted in the trunk circumference direction.
  • the second contraction portion S2 includes second thread rubbers 4F2 and 4R2 provided in the waist second region RW2 adjacent to the crotch region 1B side with respect to the first contraction portion S1 and extending along the waistline direction.
  • the trunk opening is contracted in the trunk circumference direction.
  • the range extended in the longitudinal direction of the diaper 1 is 15 mm, and the space
  • a sheet member (for example, a back sheet 7) may be disposed between or in contact with the absorber 8 and the second rubber threads 4F2 and 4R2.
  • Example 3 shows the results of the breathability quantitative test.
  • the column “Measurement Position” indicates measurement positions A to E (see FIG. 8) similar to those of the first embodiment, and the rows of measurement positions A to E indicate the wind speed (m / s) at each measurement position. Indicates.
  • the comparative example 1 and Example 4 produced the diaper of three sizes, M size, L size, and Big size.
  • Example 4 As shown in Table 6, at the measurement position A, the wind speed was significantly increased in Example 4 (0.24 m / s) than in Comparative Example 1 (0.02 m / s). . On the other hand, no significant difference was observed between Example 4 and Comparative Example 1 for measurement positions B to E. Regarding the measurement position A, it is considered that the flow of air leaking outside from the gap between the skin of the waist gather G2 and the dummy doll becomes dominant. Therefore, it can be said that the air permeability of the waist gather G2 is significantly improved in Example 4 in which the wind speed at the measurement position A is remarkably increased as compared with Comparative Example 1.
  • the number of sheet members that form the second contraction portion S2 is made larger than that of the sheet members that form the first contraction portion S1.
  • the first contraction portion S1 is formed by a total of three sheet members including the cover sheets 4F and 4R, the folded portions 4F5 and 4R5, and the air passage formation sheets 11F and 11R.
  • the second contraction part S2 includes the cover sheets 4F and 4R, the inner cover sheets 5F and 5R, the pad cover sheet 6, the back sheet 7, the center sheet 9, the folded parts 4F5 and 4R5, and the air passage forming sheet 11F. , 11R and a total of seven sheet members.
  • the second contraction part S ⁇ b> 2 includes the absorber 8. For this reason, 2nd contraction part S2 is larger in bending resistance than 1st contraction part S1.
  • the first contraction portion S1 guarantees a moisture discharge function for discharging the moisture in the internal space of the diaper 1 to the outside and a function for easily expanding the trunk opening 2T.
  • the 2nd contraction part S2 of waist gathers G2 raises the contraction force in the circumference direction of the waist compared with the 1st contraction part S1, and the position maintenance function (displacement suppression) which controls slippage at the time of wearing of the diaper 1 Function).
  • the second contraction part S2 more rigid than the first contraction part S1, the first and second flanges 41 and 42 of the cover sheets 4F and 4R and the air passage forming sheets 11F and 11R shown in FIG.
  • the first ridge 113 and the second ridge 114 can be enlarged, and thus the first ventilation path 111 and the second ventilation path 112 can be enlarged.
  • Example 4 a diaper corresponding to an example of the diaper 1 of the second embodiment and a diaper corresponding to the diaper 101 of the comparative example in the first embodiment were prepared, and the diaper slippage suppressing function was evaluated.
  • a prototype diaper corresponding to an example of the diaper 1 of Embodiment 2 is hereinafter referred to as “Example 4”.
  • a comparative diaper corresponding to the diaper 101 of the comparative example is hereinafter referred to as “comparative example 1”. Also in Example 4 and Comparative Example 1, baby diapers were prepared.
  • Example 4 “Loika HS 470 dtex” is used as the thread rubber corresponding to the first thread rubber 4F1, 4R1, and the second thread rubber 4F2, 4R2, the third thread rubber. “Loika CR 470 dtex” is used as a rubber thread corresponding to 4F3, 4R3.
  • the draft ratio of the thread rubber corresponding to the first thread rubbers 4F1 and 4R1 is 330% for the M size and 345% for the L size.
  • Comparative Example 1 the draft rate of the thread rubber corresponding to the first thread rubbers 4F1 and 4R1 is 315% regardless of the size.
  • Table 7 summarizes the distance between the rubber thread in the first contraction part and the distance between the absorber 8 and the first contraction part in the second contraction part in Comparative Example 1 and Example 4.
  • Example 4 the rigidity of the site
  • the stiffness corresponding to the first contraction portion S1 was 61 mmN
  • the stiffness corresponding to the second contraction portion S2 was 112 mmN.
  • the bending resistance indicates that the smaller the numerical value, the easier it is to bend, and the second contraction part of Example 4 is less likely to bend than the first contraction part, and the wrinkles are large.
  • the number of folds As for the number of folds, the number of folds and the average heel height were measured in a stretched state with the center of the second rubber threads 4F2 and 4R2 stretched to cut a width of 5 cm. In Comparative Example 1, the number was 9 (average ridge height 1.3 mm), while in Example 4, the number was 6 (average ridge height 2 mm). Comparing the cross-sectional area of the fold which is an index of permeability, with respect to Comparative Example 1 In 16.25 mm 2, Example 4 in 25 mm 2, and the embodiment 4 is approximately 1.5 times the cross-sectional area than Comparative Example 1 improves.
  • Example 4 the widening strength of the portions corresponding to the first contraction part S1 and the second contraction part S2 was measured.
  • Example 4 and Comparative Example 1 The widening strength test for Example 4 and Comparative Example 1 will be described.
  • the widening strength was measured in a range in which the first contracted portion and the second contracted portion in the waist gather when the trunk opening undergoes widening deformation.
  • the widening strength test was implemented about 3 types, Big size, L size, and M size, about Example 4 and Comparative Example 1, respectively.
  • the M size second contraction part S2 was set to have an interval of 7 mm and 5 pieces
  • the L size and Big size second thread rubbers were set to have an interval of 5 mm and 4 pieces.
  • the widening strength of the M-size test piece was calculated as an average value of measurement results measured when the distance between the upper and lower chuck portions was 30 cm, 44 cm, and 58 cm. Further, the widening strength of the L-size and Big-size test pieces was calculated as an average value of measurement results measured when the distance between the upper and lower chuck portions was 38 cm, 48 cm, and 62 cm.
  • Table 8 shows the results of the widening strength test for Example 4 and Comparative Example 1.
  • the average value of the widening strength at the widening width of 44 cm of each test piece prepared in Comparative Example 1 is 2.6 N for the M size and Big size, and 2.8 N for the L size in Example 4.
  • the average value of the widening strength at the widening width of 44 cm of each of the prepared test pieces was 2.4 N for the M size and Big size, and 2.5 N for the L size.
  • the widening strength of the second contraction portion is 1.4 N or more in the M size and the Big size 3 .4N or less, L size is preferably 1.5N or more and 3.5N or less, and the widening strength of Example 4 is included in the above-mentioned suitability range. It was confirmed that it could not fully perform.
  • Embodiment 3 Next, a diaper according to Embodiment 3 will be described.
  • the diaper 1 which concerns on this embodiment has the same component as the diaper which concerns on Embodiment 1 mentioned above.
  • the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the diaper 1 has a space between the center sheet 9 (an example of a “skin-side sheet member”) in the region overlapping the vicinity of the longitudinal end of the absorbent body 8 and the wearer's skin when worn. It is characterized by being formed.
  • the center sheet 9 is a sheet member that is laminated on the absorbent body 8 to form a skin facing surface.
  • FIG. 12 is a diagram schematically illustrating a state where the diaper 1 according to the third embodiment is expanded and extended.
  • A) of FIG. 12 has shown typically the internal structure at the time of seeing the diaper 1 of the state expand
  • B) of FIG. 12 has shown typically the top view of the diaper 1 of the state expand
  • the diaper 1 has fold lines 50F and 50R that are convex toward the end portion in a region overlapping the vicinity of the end portion in the longitudinal direction of the absorbent body 8 when viewed in plan.
  • the folding lines 50F and 50R may be formed on the absorbent body 8 or may be formed on the center sheet 9.
  • the folding lines 50 ⁇ / b> F and 50 ⁇ / b> R may be compressed grooves formed in the absorber 8 or the center sheet 9.
  • the folding lines 50F and 50R may be formed by embossing (3D embossing) in which the center sheet 9 is formed by two sheet members and is formed by an adhesion portion of the two sheet members.
  • the diaper 1 can form a space between the center sheet 9 and the wearer's skin by bending the end portions in the longitudinal direction of the absorbent body 8 at the time of wearing by the folding lines 50F and 50R.
  • the diaper 1 can flow the moisture from the absorber 8 that has absorbed the liquid to the first ventilation path 111 and the second ventilation path 112 through the space, and efficiently discharge the moisture to the outside.
  • the diaper 1 which concerns on this embodiment has favorable air permeability.
  • the space may be formed by adhering stretched rubber thread to the longitudinal end of the absorbent body 8.
  • Patent No. 1 various proposals have been made to improve the breathability of the absorbent article in order to discharge moisture that remains in the internal space of the absorbent article to the outside when the absorbent article is worn.
  • Patent No. 1 See Japanese Patent No. 5573806.
  • a disposable diaper is known in which an outer layer sheet and an inner layer sheet are contracted in the circumferential direction by an elastic member to form a heel around the waist, and moisture is discharged to the outside through a gap between the heel and the wearer's skin. ing.
  • an object of the present embodiment is to provide an absorbent article having better air permeability than conventional ones.
  • the absorbent article according to the present embodiment is located between the front body region covering the wearer's abdomen, the back body region covering the wearer's back, and the front body region and the back body region.
  • the absorbent article in which the crotch region where the absorbent body is arranged is continuously provided, in the front opening region and the back body region, at least the wearer's torso through which the wearer's torso can be inserted
  • a plurality of elastic members extending along the waist direction from a portion corresponding to the hip bone, and a lower shrinkage portion of the trunk opening that shrinks the trunk opening in the waist direction, an opening edge of the trunk opening, and the trunk opening
  • a trunk opening upper contraction section that includes a plurality of elastic members extending along the waistline direction between the lower contraction section and a trunk opening upper contraction section that contracts the trunk opening in the trunk circumference direction. The space between the plurality of elastic members Greater than the spacing between the plurality of elastic members having the upper constriction.
  • 6.5 mm or more and 12 mm or less may be sufficient as the space
  • the trunk opening lower contraction part may be provided in a region including a range of 20 mm or more and 40 mm or less from the edge of the opening.
  • the airflow path forming sheet is further provided so as to cover the skin facing surface in the upper shrinkage portion of the trunk opening and the lower shrinkage portion of the trunk opening.
  • a plurality of joints are intermittently provided along the joint, and the non-joint region located between the joints is bent and deformed into a corrugated shape by contraction of the upper contraction part of the trunk opening and the contraction part of the lower part of the trunk opening. By doing so, you may form a ventilation path.
  • an opening end that contracts the trunk opening in the waist direction including a plurality of elastic members extending in the waist direction along the opening edge between the opening edge and the trunk opening upper contraction portion
  • interval of the some expansion-contraction member which further has an edge side contraction part and which the opening part edge side contraction part has may be larger than the space
  • a cover sheet that includes an expansion / contraction member included in the upper contraction portion of the trunk opening in a portion forming the trunk opening, and the cover sheet is folded at the edge portion of the opening, and is folded at the fold of the folded portion. You may have a continuous ventilation hole which penetrates a cover sheet.
  • Embodiment 4 of the present invention will be described.
  • Embodiment shown below is an example of embodiment of this invention, and does not limit the technical scope of this invention to the following aspects.
  • FIG. 13 is a perspective view of a pants-type disposable diaper (hereinafter simply referred to as “diaper”) 1 according to the fourth embodiment.
  • FIG. 14 is an exploded perspective view of the diaper 1 according to the fourth embodiment.
  • FIG. 15 is the figure which showed typically the state which expand
  • (A) of FIG. 15 has shown typically the internal structure at the time of seeing the diaper 1 at the time of expansion
  • (B) of FIG. 15 has shown typically the planar structure of the diaper 1 at the time of expansion
  • the direction used in this specification shall mean the direction which corresponds to the wearer's front and rear, right and left in the state where diaper 1 was worn by the wearer.
  • the left-right direction means a direction that matches the left and right of the wearer when the diaper 1 is worn by the wearer.
  • the “front body region” of the diaper 1 means a portion that covers the abdomen (front of the body) of the wearer when the diaper 1 is worn on the wearer.
  • the “inseam area” of the diaper 1 means a portion that covers the inseam of the wearer when the diaper 1 is worn on the wearer.
  • the “rear body region” of the diaper 1 means a portion that covers the wearer's back (back of the body) when the diaper 1 is worn on the wearer.
  • the “longitudinal direction” means a direction connecting the front body region and the back body region of the diaper 1. That is, the longitudinal direction of the diaper 1 coincides with the continuous direction in which the front body region, the crotch region, and the back body region are continuously provided.
  • the “width direction” means a direction orthogonal to the longitudinal direction of the diaper 1.
  • a pants-type disposable diaper having a tubular structure having an opening into which the wearer's abdomen enters and a pair of left and right openings through which the wearer's left lower limb and right lower limb are inserted
  • the “absorbent article” in this specification is not limited to a pants-type disposable diaper.
  • the “absorbent article” includes, for example, a tape that is fixed near one end of a sheet-like member that covers the wearer's crotch (pubic region) from the front body region to the back body region, and the other end of the sheet-like member.
  • Various types of absorbent articles that can wrap the abdominal circumference and crotch such as a tape-type disposable diaper that forms a cylindrical structure by being attached in the vicinity of the part, are included.
  • the diaper 1 includes a crotch region 1B that covers the crotch (pubic region) of the wearer, a front body region 1F that covers the abdomen of the wearer, and a back body that covers the back of the wearer. And a region 1R.
  • the crotch region 1B is located between the front body region 1F and the back body region 1R and is connected to the front body region 1F and the back body region 1R, and the crotch region 1B absorbs and holds liquid.
  • a main body 15 (absorber 8) is provided.
  • the diaper 1 in this embodiment is a pants-type disposable diaper
  • the left side edge of the front body region 1F and the left side edge of the back body region 1R are joined together, and the right side edge of the front body region 1F and the back body region 1R
  • the right edges are joined to each other, thereby assembling the state shown in FIG.
  • a trunk opening (waist opening) 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R.
  • a left lower limb opening 2L is formed on the left side of the crotch region 1B where the joining is not performed
  • a right lower limb opening 2R is formed on the right side of the crotch region 1B.
  • the left lower limb opening 2L and the right lower limb opening 2R are openings through which the wearer's legs are inserted when the diaper 1 is worn.
  • the wearer's left lower limb is inserted into the left lower limb opening 2L
  • the wearer's right lower limb is inserted into the right lower limb opening 2R
  • the wearer's torso enters (passes through) the torso opening 2T.
  • the front body region 1F contacts the wearer's abdomen
  • the back body region 1R contacts the wearer's back side
  • the crotch region 1B is applied to the wearer's crotch
  • the left lower limb opening 2L and right lower limb opening 2R are fixed to the wearer's body in a state of surrounding the wearer's thigh. Since the diaper 1 is fixed to the wearer's body in this manner, it is possible to walk while the diaper 1 is worn.
  • an absorbent body 8 that can absorb and hold liquid is mainly disposed around the crotch region 1B. Further, in the diaper 1, in order to suppress the formation of a gap as a liquid outflow path between the diaper 1 and the wearer's skin, the left lower limb opening 2 ⁇ / b> L, the right lower limb opening 2 ⁇ / b> R, the torso opening
  • the part 2T is provided with a three-dimensional gather G1L, a three-dimensional gather G1R, and a waist gather G2, respectively.
  • the three-dimensional gathers G1L and G1R and the waist gather G2 are configured so as to be in close contact with the wearer's skin by the elastic force of the rubber thread, so that the excretory fluid discharged from the wearer is not leaked from the diaper 1. It can be made to absorb in the absorption part main body 15 (absorber 8).
  • the diaper 1 has cover sheets 4F and 4R and a pad cover sheet 6 that form an outer surface in a state worn on the wearer.
  • the cover sheet 4F is a sheet member that mainly forms the outer surface of the front body region 1F of the diaper 1.
  • the pad cover sheet 6 is a sheet member for mainly forming the outer surface of the crotch region 1B of the diaper 1.
  • the cover sheet 4R is a sheet member for mainly forming the outer surface of the rear body region 1R of the diaper 1.
  • the cover sheets 4F and 4R and the pad cover sheet 6 are provided, for example, for reinforcing the outer surface of the diaper 1 and improving the touch.
  • the cover sheets 4F and 4R and the pad cover sheet 6 can be formed of a nonwoven fabric made of, for example, a liquid-impermeable thermoplastic resin in order to suppress leakage of excrement.
  • the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP).
  • PE polyethylene
  • PP polypropylene
  • the liquid-impermeable sheet may have a large number of fine pores of about 0.1 to several ⁇ m so that the liquid-impermeable and moisture-permeable properties are exhibited.
  • the diaper 1 has the inner cover sheet 5F laminated
  • the “skin facing surface” means a surface facing the wearer's skin when the wearer wears the diaper 1.
  • the inner cover sheet 5F is a sheet member that is bonded to the cover sheet 4F in a state where a rubber thread that is a linear elastic member is sandwiched between the cover sheet 4F and the interlayer.
  • the inner cover sheet 5F is a sheet member having a shape and a size corresponding to a portion of the cover sheet 4F excluding the folded portion 4F5 described later and the waist first region RW1 in the exterior cover portion 4F10.
  • the inner cover sheet 5R is a sheet member that is bonded to the cover sheet 4F in a state in which a thread rubber that is a linear elastic member is sandwiched between the layers with the cover sheet 4R.
  • the inner cover sheet 5R is a sheet member having a shape and a size corresponding to a portion of the cover sheet 4R excluding the folded portion 4R5 described later and the waist first region RW1 in the exterior cover portion 4R10.
  • the diaper 1 of the present embodiment includes an absorbent body 15.
  • the absorbent main body 15 is held in a state of being bridged between the front body region 1F and the back body region 1R, and is placed on the inseam of the wearer when the diaper 1 is worn, and liquid such as urine excreted by the wearer. Absorb and hold.
  • the absorbent body 15 includes a pad cover sheet 6, a back sheet 7, an absorbent body 8, a center sheet 9, side sheets 10 ⁇ / b> L, 10 ⁇ / b> R, and the like, and is integrally formed by these. .
  • the back sheet 7, the absorber 8, and the center sheet 9 are laminated in order on the skin facing surface of the pad cover sheet 6.
  • the pad cover sheet 6 has a length in the longitudinal direction that reaches from the wearer's front body to the back body through the crotch, and has a rectangular plane having a predetermined lateral width in the width direction orthogonal to the longitudinal direction. It is a sheet member to have.
  • the back sheet 7, the absorbent body 8, and the center sheet 9 are all sheet members having a rectangular plane like the pad cover sheet 6, and the pad cover is in a state where the longitudinal direction coincides with the longitudinal direction of the pad cover sheet 6.
  • the sheets 6 are laminated in this order.
  • the absorber 8 is a member that absorbs liquid such as urine and holds the absorbed liquid.
  • the absorber 8 is disposed between the liquid-impermeable back sheet 7 and the liquid-permeable center sheet 9.
  • Absorbent body 8 has water in gaps between short fibers of cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by subjecting synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate to hydrophilic treatment. It may have a structure in which a granular absorbent resin such as a hydrophilic superabsorbent polymer having a cross-linked structure capable of absorbing and retaining water is retained.
  • the absorber 8 may have a single layer structure made of one mat or a laminated structure in which a plurality of mats are stacked. Moreover, the absorber 8 can employ
  • the center sheet 9 is a sheet member that directly contacts the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 8, and is laminated so as to cover the water absorption surface of the absorbent body 8.
  • the center sheet 9 in the present embodiment is formed of a highly permeable liquid permeable material. Examples of the liquid permeable material forming the center sheet 9 include a woven fabric, a nonwoven fabric, and a porous film.
  • the center sheet 9 may have hydrophilicity.
  • the back sheet 7 is a sheet member for suppressing the liquid that has passed through the center sheet 9 and absorbed by the absorber 8 from leaking to the outside of the diaper 1. For this reason, the back sheet 7 is formed of a liquid-impermeable material.
  • the liquid impermeable material forming the back sheet 7 include a liquid impermeable film made of polyethylene resin.
  • the backsheet 7 may be formed of a microporous polyethylene film in which a large number of micropores are formed in order to ensure air permeability.
  • the pad cover sheet 6 is a member for reinforcing the back sheet 7 and improving the touch thereof, and is bonded to the back sheet 7.
  • Examples of the material forming the pad cover sheet 6 include woven fabric and non-woven fabric.
  • the pad cover sheet 6 may be a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.
  • the side sheets 10L and 10R in the absorber main body 15 are elongated strip-shaped members for forming the above-described three-dimensional gathers G1L and G1R.
  • the side sheets 10 ⁇ / b> L and 10 ⁇ / b> R are extended along the long side portion of the center sheet 9. Further, thread rubbers 10L1 and 10R1 are bonded to the side sheets 10L and 10R along the longitudinal direction.
  • the left side edge 4F7 of the cover sheet 4F forming the left side edge of the front body region 1F and the left side edge 4R7 of the cover sheet 4R forming the left side edge of the back body region 1R are joined together, and the right side edge of the front body region 1F is joined When the diaper 1 shown in FIG.
  • a method for joining the side edges of the cover sheets 4F and 4R is not particularly limited, and examples thereof include heat sealing, high frequency sealing, and ultrasonic sealing.
  • the absorbent body 15 extends from the front body region 1F to the back body region 1R.
  • the cover sheet 4F has a folded portion 4F5 formed by folding the front end side inward with the fold line 4F6 as a boundary.
  • a portion of the cover sheet 4F excluding the folded portion 4F5 is referred to as an exterior cover portion 4F10.
  • the exterior cover portion 4F10 of the cover sheet 4F forms the outer surface of the diaper 1.
  • the fold line 4F6 of the cover sheet 4F forms a trunk opening edge 4F9 of the trunk opening 2T in a state where the diaper 1 is assembled.
  • the folded-back portion 4F5 in the cover sheet 4F has an extended first thread rubber 4F1 disposed between the outer cover portion 4F10 and the interlayer. Further, the front end side of the folded portion 4F5 in the cover sheet 4F is a state in which one end side in the longitudinal direction of the inner cover sheet 5F, the pad cover sheet 6, the back sheet 7 and the absorbent body 8 is sandwiched between the layers with the exterior cover portion 4F10. Thus, the absorbent body 8 is bonded in a state of being overlapped with one end portion.
  • the aspect at the time of expressing that one member and another member are overlapped is not limited to an aspect in which the members overlap each other in a state of being in full contact with each other. It is a concept including a mode in which a part of the other member and the whole of the other member overlap, or a mode in which a part of one member and the other member overlap each other.
  • the second thread rubber 4F2, the third thread rubber 4F3, and the fourth thread rubber 4F4 are arranged from the folding line 4F6 side. However, they are arranged in this order, and are bonded in a state of being sandwiched between the outer cover portion 4F10 and the inner cover sheet 5F.
  • a plurality of first thread rubbers 4F1 to 4F thread rubbers 4F4 in the cover sheet 4F are arranged in parallel, each along the width direction (the waistline direction) of the cover sheet 4F. It is extended.
  • the cover sheet 4R also has a folded portion 4R5 formed by folding the front end side inward with the fold line 4R6 as a boundary.
  • a portion of the cover sheet 4R excluding the folded portion 4R5 is referred to as an exterior cover portion 4R10.
  • the exterior cover portion 4R10 of the cover sheet 4R forms the outer surface of the diaper 1.
  • the folding line 4R6 of the cover sheet 4R forms a trunk opening edge 4R9 of the trunk opening 2T in a state where the diaper 1 is assembled.
  • the extended first thread rubber 4R1 is disposed between the outer cover portion 4R10 and the interlayer.
  • the other end side of the inner cover sheet 5R, the pad cover sheet 6, the back sheet 7, and the absorbent body 8 in the longitudinal direction is sandwiched between the outer cover part 4R10 and the front end side of the folded portion 4R5 in the cover sheet 4R. In the state, it is bonded in a state of being overlapped with the other end portion of the absorber 8.
  • the second thread rubber 4R2, the third thread rubber 4F3, and the fourth thread rubber 4R4 are arranged from the folding line 4R6 side. Are arranged in this order, and are bonded in a state of being sandwiched between the outer cover portion 4R10 and the inner cover sheet 5R.
  • the first thread rubber 4R1 to the fourth thread rubber 4R4 in the cover sheet 4R are each arranged in parallel, and all are along the width direction (the waistline direction) of the cover sheet 4R. It is extended.
  • the waist area RW of the diaper 1 is an area where the waist gathers G2 are formed in the vicinity of the trunk opening edges 4F9 and 4R9 forming the trunk opening 2T.
  • a region where the first rubber threads 4F1 and 4R1 are disposed is referred to as a “waist first region RW1” (first region), and a region where the second rubber rubbers 4F2 and 4R2 are disposed. Is referred to as “waist second region RW2” (second region).
  • an area where the third thread rubbers 4F3 and 4R3 and the fourth thread rubbers 4F4 and 4R4 are arranged is referred to as a “tammy area RT”.
  • the Tammy region RT is a region located below the waist region RW.
  • the region where the third rubber threads 4F3, 4R3 are disposed is referred to as “tammy first region RT1”, and the region where the fourth rubber rubbers 4F4, 4R4 are disposed is referred to as “tammy second region RT2.
  • the first rubber threads 4F1 and 4R1 in the waist first region RW1 are applied with an adhesive in an expanded state in the assembly process of the diaper 1, for example, and then the exterior cover portions 4F10 and 4R10 and the folded portions 4F5 are applied. By being sandwiched between 4R5, it adheres between these layers.
  • the second thread rubbers 4F2 and 4R2 in the waist second region RW2 and the third thread rubbers 4F3 and 4R3 and the fourth thread rubbers 4F4 and 4R4 in the tammy region RT are expanded in the assembly process of the diaper 1, for example. After the adhesive is applied in this state, it is bonded between the outer cover portions 4F10, 4R10 of the cover sheets 4F, 4R and the inner cover sheets 5F, 5R by being sandwiched between them.
  • the first rubber threads 4F1 and 4R1 in the waist first region RW1 that are sandwiched and bonded between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are contracted.
  • the portion corresponding to the waist first region RW1 of the exterior cover portions 4F10, 4R10 and the folded portions 4F5, 4R5 is continuously bent in a pleated shape to follow the waist first region RW1 in the waistline direction.
  • a first contraction portion S1 that contracts is formed.
  • the waist second region RW2 when the second rubber threads 4F2 and 4R2 which are sandwiched and bonded in an extended state between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R are contracted, the exterior is followed accordingly.
  • the cover portions 4F10, 4R10 and the inner cover sheets 5F, 5R the second contraction that contracts the waist second region RW2 in the waistline direction by continuously bending the portion corresponding to the waist second region RW2 in a pleated shape.
  • a portion S2 (which is an example of a “body opening upper contraction portion” in the present application) is formed.
  • the waist gather G2 is formed mainly by the first contraction portion S1 formed in the waist first region RW1 and the second contraction portion S2 formed in the waist second region RW2.
  • the waist gather G2 improves the fit of the diaper 1 around the wearer's waist by the contraction force of the first thread rubber 4F1, 4R1 and the second thread rubber 4F2, 4R2.
  • a plurality of first rubber threads 4F1 and 4R1 are arranged in parallel with each other at a constant interval A1.
  • a plurality of second rubber threads 4F2 and 4R2 are provided in the second contraction portion S2 of the waist gather G2 in parallel with each other and at a constant interval A2.
  • interval of thread rubber here means the dimension which spaces apart adjacent thread rubber in the longitudinal direction (direction which connects a body part area
  • the first rubber bands 4F1 and 4R1 in the first waist region RW1 and the second rubber bands 4F2 and 4R2 in the second waist region RW2 extend over the entire width section of the cover sheets 4F and 4R. ing. Therefore, after the diaper 1 is completed, the first rubber threads 4F1 and 4R1 and the second rubber threads 4F2 and 4R2 form a substantially annular elastic member that circulates along the trunk opening 2T. In other words, after the diaper 1 is completed, the waist gather G2 (the first contraction part S1 and the second contraction part S2) is formed over the entire circumference in the waistline direction.
  • the third rubber threads 4F3 and 4R3 which are sandwiched and bonded in an extended state between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are contracted.
  • the portion corresponding to the first tammy region RT1 is continuously bent in a pleated shape, so that A third contraction portion S3 (which is an example of “the trunk opening lower contraction portion” in the present application) that contracts one region RT1 in the waistline direction is formed.
  • 3rd contraction part S3 is an area
  • the fourth thread rubbers 4F4 and 4R4 which are sandwiched and bonded in an extended state between the outer cover portions 4F10 and 4R10 and the inner cover sheets 5F and 5R in the cover sheets 4F and 4R are also provided.
  • the portion corresponding to the Tammy second region RT2 of the exterior cover portions 4F10, 4R10 and the inner cover sheets 5F, 5R in the cover sheets 4F, 4R continuously bends in a pleated shape.
  • a fourth contraction portion S4 that contracts the Tammy second region RT2 in the waistline direction is formed.
  • the Tammy gather G3 is formed mainly by the third contraction portion S3 formed in the Tammy first region RT1 and the fourth contraction portion S4 formed in the Tammy second region RT2.
  • the Tammy Gather G3 improves the fit of the diaper 1 around the lower abdomen of the wearer, for example, by the contraction force of the third rubber threads 4F3 and 4R3 and the fourth rubber threads 4F4 and 4R4.
  • the third thread rubbers 4F3 and 4R3 arranged in the third contraction part S3 of the Tammy Gather G3 are provided in parallel with each other and with a certain distance A3.
  • the fourth rubber threads 4F4 and 4R4 disposed in the fourth contraction portion S4 of the Tammy gather G3 are also provided in parallel with each other and with a constant interval A4.
  • the distance A3 between the third thread rubbers 4F3 and 4R3 in the third contraction part S3 of the Tammy gather G3 is greater than the distance A2 between the second thread rubbers 4F2 and 4R2 in the second contraction part S2 of the waist gather G2.
  • the second contraction portion S2 is relatively easy to expand.
  • the thread rubbers 4F1, 4R1, 4F2, 4R2, 4F3, 4R3, 4F4, 4R4 are attached to the cover sheets 4F, 4R.
  • “linear” represents an elongated shape extending in a specific direction, and is a concept including a strip shape and a strip shape.
  • natural rubber, synthetic rubber, etc. can be illustrated as a material of thread rubber, However, It is not limited to a specific material.
  • the diaper 1 includes the folded portions 4F5 and 4R5 in the cover sheets 4F and 4R, the pad cover sheet 6 in the absorbent body 15 and the longitudinal end regions of the center sheet 9 and the like.
  • Ventilation path forming sheets 11F and 11R are provided so as to be stacked on the folded portions 4F5 and 4R5.
  • the ventilation path forming sheets 11F and 11R form skin contact surfaces in the waist gather G2 and the tammy gather G3 of the diaper 1.
  • the “skin contact surface” means a surface that directly contacts the wearer's skin when the diaper 1 is worn, that is, the innermost surface of the diaper 1.
  • FIG. 16 is a diagram illustrating an installation mode of the air passage forming sheets 11F and 11R of the diaper 1 according to the embodiment.
  • (A) of FIG. 16 is a figure which shows the state which looked at 1st contraction part S1 of waist gathers G2 from the internal space side of the diaper 1.
  • FIG. Moreover, (B) of FIG. 16 is a figure which shows typically the internal structure in 1st contraction part S1 of the waist gather G2 at the time of seeing from the side of the diaper 1.
  • FIG. Moreover, (C) of FIG. 16 is a figure which shows the state which looked at 1st contraction part S1 of waist gathers G2 from the upper direction (namely, A arrow direction of (B)) of the diaper 1.
  • FIG. 16A and 16C show a state before the first contraction portion S1 in the waist gather G2 contracts for convenience.
  • (D) of FIG. 16 is a figure which shows the state which looked at 1st contraction part S1 of waist gathers G2 after shrinkage
  • the ventilation path forming sheets 11F and 11R are disposed at sites corresponding to at least the first contraction part S1, the second contraction part S2, and the third contraction part S3, and the pad cover is provided via a joint part indicated by reference numeral S.
  • the sheet 6 is joined to the end region in the longitudinal direction and the folded portions 4F5, 4R5 and the like.
  • FIG. 17 is a view showing a portion of the joining portion S joining the air passage forming sheets 11F and 11R.
  • the folded portions 4F5 and 4R5 of the cover sheets 4F and 4R formed of the thermoplastic resin and the air passage forming sheets 11F and 11R superimposed on the pad cover sheet 6 are joined by ultrasonic welding, thereby joining. Part S is formed. As shown in FIG. 16A and FIG.
  • a plurality of joints S are intermittent along the longitudinal direction perpendicular to the trunk direction (width direction) from the trunk opening edges 4F9 and 4R9 of the cover sheets 4F and 4R.
  • the linear joint SL extending in the longitudinal direction of the diaper 1 is formed.
  • one linear joint portion SL is formed as an assembly of a plurality of joint portions S that are intermittently arranged along the longitudinal direction of the diaper 1.
  • “intermittently” means an aspect of being discontinuously or intermittently arranged.
  • a plurality of linear joints SL are intermittently provided along the waistline direction (width direction) of the cover sheets 4F and 4R in the first contraction part S1 of the waist gather G2.
  • the linear joints SL are provided in parallel to each other, and the intervals between the linear joints SL are set to be alternately large and small.
  • the linear joints SL are intermittently arranged in such a manner that double lines formed by a set of linear joints SL are arranged at equal intervals in the waistline direction (width direction).
  • FIG. 15 (A) the range which the linear junction part SL extends in the longitudinal direction of the diaper 1 is shown by hatching. As illustrated, the linear joint portion SL extends across the waist first region RW1 where the first contraction portion S1 is formed and the waist second region RW2 where the second contraction portion S2 is formed.
  • the ultrasonic joining of the air passage forming sheets 11F and 11R in the first contraction part S1 and the second contraction part S2 of the waist gather G2 and the third contraction part S3 of the Tammy gather G3 is performed by the first thread rubber 4F1 and 4R1 of the waist gather G2. And the second rubber threads 4F2 and 4R2, and the third rubber threads 4F3 and 4R3 and the fourth rubber threads 4F4 and 4R4 of Tammy Gather G3 are in an extended state. Then, after the joining of the air passage forming sheets 11F and 11R in the first contraction part S1 and the second contraction part S2 of the waist gather G2 and the third contraction part S3 of the Tammy gather G3 is completed, the sheet is sandwiched and fixed between the sheet layers.
  • the extended states of the first thread rubbers 4F1 and 4R1, the second thread rubbers 4F2 and 4R2, the third thread rubbers 4F3 and 4R3, and the fourth thread rubbers 4F4 and 4R4 are released.
  • the waist gather G2 and the Tammy gather G3 contract, and the interval between the linear joint portions SL in the air passage forming sheets 11F and 11R is narrowed.
  • the non-joining regions 110 located between the linear joining portions SL are separated, and as shown in FIG. 16D, the folded portions 4F5, 4R5 and the like and the air passage forming sheets 11F, 11R.
  • a first air passage 111 surrounded by the non-joining region 110 is formed.
  • the 2nd ventilation path 112 is formed in the skin contact surface 11a side of the ventilation path formation sheets 11F and 11R.
  • a two-dot chain line indicated by a symbol SS in FIG. 16D indicates a skin surface that comes into contact with the air passage forming sheets 11F and 11R as a virtual line when the diaper 1 is worn by the wearer.
  • the second air passage 112 is formed as a gap formed between the skin contact surface 11a of the air passage forming sheets 11F and 11R and the skin of the wearer when the diaper 1 is worn by the wearer. Moisture in the inner space of the diaper 1 passes through the first air passage 111 and the second air passage 112 formed in the first contraction part S1 and the second contraction part S2 of the waist gather G2, and the third contraction part S3 of the Tammy gather G3. It can be discharged to the outside.
  • the 1st ventilation path 111 is a ventilation path through which the moisture which permeate
  • the second ventilation path 112 is a ventilation path that directly communicates the internal space and the external space of the diaper 1, and can discharge the moisture in the diaper 1 more smoothly.
  • the relatively large first collar 41 and the relatively small second collar that form the first contraction part S1. 42 are alternately formed.
  • the relatively large first ridges 113 and the relatively small second ridges 114 are alternately formed in the air passage forming sheets 11F and 11R that are bent and deformed in the waveform. This is due to the fact that the intervals between the linear joint portions SL are set to be alternately large and small. That is, a large first rod 41, 113 is formed by a set of linear joints SL having a large interval, and a small second rod 42, 114 is formed by a set of linear junctions SL having a small interval.
  • the first ridge 113 of the airflow passage forming sheets 11F and 11R that are bent and deformed in a waveform is to cooperate with the first ridge 41 that forms the first contraction portion S1 in order to secure a large first airflow passage 111.
  • the second ridge 114 of the ventilation path forming sheets 11F and 11R cooperates with the second ridge 42 forming the first contraction portion S1 to form the first ventilation path 111 and in the waistline direction (width direction). This contributes to properly separating the adjacent first flanges 113 and securing a ventilation cross section of the second ventilation path 112.
  • the flute structure formed by the airflow passage forming sheets 11F and 11R that deform into a wave shape following the contraction of the waist gathers G2 and Tammy gathers G3 has the first contraction part S1 and the second contraction of the waist gathers G2.
  • the moisture in the diaper 1 can be efficiently discharged to the outside through the first ventilation path 111 and the second ventilation path 112. it can.
  • the linear junction part SL is formed as an aggregate
  • the adjacent first ventilation paths 111 are communicated with each other. Therefore, it is possible to improve the air permeability between the adjacent first air passages 111 and make it difficult for the wearer to receive a local feeling of stuffiness.
  • the ventilation path forming sheets 11F and 11R in the present embodiment are provided with a large number of fine ventilation holes 11F1 and 11R1 for ventilation.
  • the air hole means an opening that allows communication between the space on one side of the sheet and the space on the other side, and the shape thereof is not particularly limited. Therefore, as the vent holes 11F1 and 11R1, for example, openings having a shape such as a circle, an ellipse, and a polygon (triangle, square, etc.) can be applied.
  • the formation of the air holes 11F1, 11R1 in the air passage forming sheets 11F, 11R does not mean that the air passage forming sheets 11F, 11R are a material having no air permeability, and the air passage forming sheets 11F, 11R, 11R may be either a breathable material or a non-breathable material.
  • the air passage forming sheets 11F and 11R are preferably made of a material having air permeability and liquid permeability, but may be a non-breathable material, for example.
  • the size and the number of the vent holes 11F1 and 11R1 are not particularly limited. For example, if the opening area is 0.5 to 10 mm 2 , about 5 to 200 are preferably formed.
  • the present inventors have determined that the third thread rubber 4F3 forming the third contraction part S3 is larger than the interval A2 between the second thread rubbers 4F2 and 4R2 forming the second contraction part S2.
  • the third contraction S3 is guided to the wearer's hip bone so that the diaper 1 is in an appropriate wearing state, and the third contraction expands and contracts in accordance with the wearer's movement. It came to find that the pump effect accompanying the deformation
  • the air passage forming sheets 11F and 11R are restrained by the third thread rubbers 4F3 and 4R3 as compared to the case where the distance A3 is set to a narrower distance.
  • the first ventilation path 111 and the second ventilation path 112 become larger due to a decrease in the degree of restraint, and the pumping effect in the third contraction part S3 is increased.
  • FIG. 18 is a diagram showing the magnitude of contraction force in each contraction part.
  • the white arrow shown in FIG. 18 indicates the magnitude of the contractile force.
  • the distance A3 between the third thread rubbers 4F3 and 4R3 forming the third contraction part S3 is larger than the distance A2 between the second thread rubbers 4F2 and 4R2 forming the second contraction part S2. large. Therefore, as for the diaper 1 of this embodiment, as FIG. 18 shows, the contraction force of 3rd contraction part S3 is weaker than the contraction force of 1st contraction part S1 and 2nd contraction part S2.
  • And 3rd contraction part S3 is designed so that a wearer's hipbone may be contact
  • the third contraction part S3 is a torso opening 2T so as to coincide with a range of 20 mm or more and 40 mm or less, which is a distance from the first joint and the second joint of a general adult index finger to the tip of the finger. It is provided in the area
  • the torso opening 2T is used when the wearer wears it. Since the third contraction part S3 spreads most when it is expanded at the position, the second joint of the index finger of the person performing the wearing operation is applied to the vicinity of the opening edge of the trunk opening part 2T, and the first contraction part S1 and the first contraction part S1 A state in which the second contraction part S2 is located between the first joint and the second joint of the index finger and the tip of the index finger is caught by the third contraction part S3 that is easier to expand than the first contraction part S1 and the second contraction part S2. Become.
  • the diaper 1 designed so that the third contraction portion S3 contacts the wearer's hipbone is attached to the wearer at an appropriate position.
  • FIG. 19 is a diagram for explaining wrinkles formed in the second contraction part S2 of the waist gather G2 and the third contraction part S3 of the Tammy gather G3.
  • the degree of restraint by the thread rubber increases as the distance between the thread rubbers becomes closer to the thread rubber. Accordingly, the first ridge 113 and the second ridge 114 of the air passage forming sheets 11F and 11R formed between the third rubber threads 4F3 and 4R3 are narrower than the distance A3 between the third rubber threads 4F3 and 4R3.
  • the air passage forming sheets 11F and 11R formed between the second rubber threads 4F2 and 4R2 arranged at the interval A2 are more restrained than the first and second ridges 113 and 114.
  • the wrinkle formed in the third contraction part S3 of Tammy Gather G3 is larger than the wrinkle formed in the second contraction part S2 of the waist gather G2.
  • sizes of the 1st ventilation path 111 and the 2nd ventilation path 112 which are formed of the 1st collar 113 and the 2nd collar 114 in the part of Tammy gather G3 are other It becomes larger than the part.
  • Tammy gather G3 is a part which expands-contracts by a wearer's operation
  • the pump function is demonstrated by this, and the moisture in the diaper 1 is discharged
  • the wearer's hipbone portion is the portion having the largest width around the wearer's waist, and is also a place where the surroundings of the wearer are in contact with each other and external pressure is easily applied. Therefore, Tammy Gather G3 corresponding to the hipbone portion Then, the pump effect by the 1st ventilation path 111 and the 2nd ventilation path 112 expanding and contracting with external pressure is also anticipated. Thereby, the interior space of the diaper 1 can be made into a more comfortable environment.
  • the wrinkle formed in the part of Tammy Gather G3 is larger than the wrinkle formed in the 2nd contraction part S2 of West Gather G2, the wrinkle of the part of Tammy Gather G3 Is more conspicuous than the others, and the wearer can be made to naturally recognize Tammy Gather G3 so as to come into contact with the hip bone having the largest width around the waist of the wearer.
  • the wrinkle formed in the portion of Tammy Gather G3 is larger than the wrinkle formed in the second contraction portion S2 of the waist gather G2, the portion of the Tammy Gather G3 tends to spread when the body opening 2T is widened. For this reason, when wearing the diaper 1, the diaper 1 is easily aligned naturally so that the portion of the Tammy Gather G3 that is relatively easy to spread contacts the hipbone.
  • FIG. 20 is a diagram schematically illustrating a state in which the diaper 1 according to the modification is developed.
  • the interval A1 between the first rubber threads 4F1 and 4R1 in the first contraction portion S1 is set to a larger dimension than the interval A2 between the second rubber threads 4F2 and 4R2 in the second contraction portion S2. Therefore, the first contraction portion S1 ensures the moisture discharging function of discharging the moisture in the internal space of the diaper 1 to the outside and the function of easily expanding the trunk opening 2T.
  • the 2nd contraction part S2 of waist gathers G2 raises the contraction force in the circumference direction of the waist compared with the 1st contraction part S1, and the position maintenance function (displacement suppression) which controls slippage at the time of wearing of the diaper 1 Function).
  • FIG. 21 is a diagram for explaining wrinkles formed in the first contraction part S1 and the second contraction part S2 of the waist gather G2 and the third contraction part S3 of the Tammy gather G3.
  • the heel formed between the rubber threads has a higher degree of restraint by the rubber thread as the distance from the rubber thread is shorter.
  • the first ridge 113 and the second ridge 114 of the air passage forming sheets 11F, 11R formed between the first thread rubbers 4F1, 4R1 are narrower than the distance A1 between the first thread rubbers 4F1, 4R1.
  • the air passage forming sheets 11F and 11R formed between the second rubber threads 4F2 and 4R2 arranged at the interval A2 are more restrained than the first and second ridges 113 and 114.
  • the wrinkle formed in the 1st contraction part S1 of waist gathers G2 becomes larger than the wrinkle formed in the 2nd contraction part S2 of waist gathers G2.
  • the 1st ventilation path 111 and the 2nd ventilation path 112 which are formed of the 1st ridge 113 and the 2nd ridge 114 are shown. Is larger than the portion of the second contraction portion S2. Since the waist gather G2 is a portion that expands and contracts due to the wearer's movement, the first air passage 111 and the second air passage 112 have a portion of the first contraction part S1 of the waist gather G2 and a portion of the Tammy gather G3.
  • the pump function is exhibited at two locations, and the moisture in the diaper 1 is discharged more smoothly (double pump function). Thereby, the interior space of the diaper 1 can be made into a more comfortable environment.
  • interruption put in linear form may be located in the dotted line form in the folding lines 4F6 and 4R6 of the cover sheets 4F and 4R.
  • the dotted line-shaped air holes formed in the folding lines 4F6 and 4R6 have a size that does not allow the wearer's finger to enter. For example, if the ventilation hole is formed by a cut having a length of 5 mm or less, a general infant's finger cannot enter.
  • the folded lines 4F6 and 4R6 are cut lines that form dotted-line vent holes so that the cover sheets 4F and 4R do not tear at the folded lines 4F6 and 4R6 as a boundary due to the normal use state of the diaper 1. It is preferable that the distance between each other has a predetermined length. Depending on the strength of the material constituting the cover sheets 4F and 4R, if the sheet has a basis weight of about 8 to 50 g / m 2 that does not impair the stretchability and wearing feeling required for the waistline, It is preferable that it is 2 mm or more.
  • FIG. 22 is a view showing air holes formed in the opening edge of the trunk opening 2T when the waist gather G2 contracts.
  • FIG. 22 shows the cover sheet 4F, the same applies to the cover sheet 4R.
  • the fold lines 4F6 and 4R6 of the cover sheets 4F and 4R are dotted line-shaped air holes formed by fine cuts that are linearly formed.
  • the fine cuts forming the fold lines 4F6 and 4R6 spread, and the vent holes 4F6K other than the joint 4F6T between the cuts spread. Therefore, in the diaper 1 of this modified example, not only the air passages (spaces shown by the halftone in FIG.
  • the diaper 1 of the present embodiment has higher air permeability in the waist gather 3R than that in which the vent holes 4F6K are not formed in the portions of the folding lines 4F6 and 4R6.
  • the form having the double pump function shown as the above-described modification that is, the form in which the pump function is exhibited at two locations of the first contraction part S1 of the waist gather G2 and the part of the Tammy gather G3, respectively.
  • ventilation through the ventilation hole 4F6K is also added, so that the moisture in the diaper 1 can be discharged more smoothly. Thereby, the interior space of the diaper 1 can be made into a more comfortable environment.
  • the air passage forming sheets 11F and 11R are provided, but the air passage forming sheets 11F and 11R may be omitted.
  • the air passage forming sheets 11F and 11R are omitted, the first air passage 111 and the second air passage 112 are lost, but the decrease in the degree of restraint by the third rubber threads 4F3 and 4R3 is maintained.
  • the state where the size of the wrinkles formed in the contraction part S3 is larger than the surroundings is maintained, and the pump effect in the third contraction part S3 can be maintained as in the above embodiment.

Landscapes

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

Abstract

L'invention concerne un article absorbant qui présente une respirabilité supérieure par rapport à celle de l'état de la technique. Cet article absorbant comprend une première partie de contraction qui étire l'ouverture de taille autour de la taille. La première partie de contraction comprend des premiers éléments élastiques qui sont disposés dans une direction autour de la taille et est située sur une première région parmi la région de corps avant et la région de corps arrière, la première région étant proximale par rapport à un bord d'ouverture de taille qui forme une ouverture de taille à travers laquelle la taille du porteur peut être passée. La première partie de contraction possède une pluralité de premiers éléments élastiques disposés sur celle-ci à un intervalle constant et l'intervalle entre lesdits premiers éléments élastiques se situe dans la plage de 6,5 mm à 20 mm, valeurs extrêmes incluses.
PCT/JP2019/021886 2018-05-31 2019-05-31 Article absorbant Ceased WO2019230982A1 (fr)

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JP2018-105360 2018-05-31
JP2018105359A JP6662409B2 (ja) 2018-05-31 2018-05-31 吸収性物品
JP2018105360A JP6662410B2 (ja) 2018-05-31 2018-05-31 吸収性物品
JP2018-105359 2018-05-31
JP2018244832A JP7519757B2 (ja) 2018-12-27 2018-12-27 吸収性物品
JP2018-244832 2018-12-27

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CN114788761B (zh) * 2021-01-25 2023-03-24 王子控股株式会社 吸收性物品
CN219516842U (zh) * 2022-02-03 2023-08-15 王子控股株式会社 吸收性物品

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