WO2020085408A1 - 使い捨ておむつ - Google Patents

使い捨ておむつ Download PDF

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Publication number
WO2020085408A1
WO2020085408A1 PCT/JP2019/041604 JP2019041604W WO2020085408A1 WO 2020085408 A1 WO2020085408 A1 WO 2020085408A1 JP 2019041604 W JP2019041604 W JP 2019041604W WO 2020085408 A1 WO2020085408 A1 WO 2020085408A1
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WO
WIPO (PCT)
Prior art keywords
base point
deformation
region
width direction
deformation base
Prior art date
Application number
PCT/JP2019/041604
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
拓巳 市原
坂口　智
山中　康弘
真衣香 ▲高▼橋
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Publication of WO2020085408A1 publication Critical patent/WO2020085408A1/ja

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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
    • A61F13/53—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 absorbing medium
    • A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • 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
    • A61F13/53—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 absorbing medium
    • A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/533—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
    • 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 a disposable diaper having an absorbent core provided with a deformation base point portion.
  • Patent Document 1 provides a disposable diaper having an absorbent core provided with a deformation base point portion.
  • the deformation base point portion of Patent Document 1 is configured by a pair of groove-shaped portions extending in the front-rear direction.
  • the groove-like portion serves as a deformation starting point of the absorbent core.
  • the absorbent core is deformed at the time of wearing, with the groove-shaped portion as a base point.
  • the above-mentioned disposable diaper has the following problems.
  • the front waistline region of the disposable diaper is pulled up to the ventral side (front side), or the crotch region is pressed inward in the width direction.
  • the waistline holding region extending in the width direction from the fastening portion of the fastening tape is in close contact with the body, in the front waistline region, with the rear edge of the waistline holding region as a base point, the rear edge of the waistline holding region The region on the crotch side is more likely to be deformed than that.
  • a region between the rear edge of the waistline holding region in the front waistline region and the center of the disposable diaper in the front-rear direction is likely to receive an inward force in the width direction and a forward force due to the movement of the legs.
  • the widthwise center of the absorbent core is crushed, or the vicinity of the leg opening is crushed, causing the absorbent core to undergo unintended deformation.
  • the body cannot be covered with the absorbent core, which may cause leakage.
  • the disposable diaper which concerns on one aspect has the front-back waist region, the back waist region, and the crotch region arrange
  • An absorption core disposed in a region, a fastening tape disposed in the rear waistline region and capable of being fixed to the front waistline region, and a waistline extending along the width direction in the front waistline region and the rear waistline region
  • a second virtual line extending in a direction and a third virtual line passing through the centers of the first virtual line and the second virtual line in the front-rear direction and extending in the width direction are set, the deformation base point portion At least a part is provided in the abdominal region between the first virtual line and the third virtual line.
  • FIG. 1 is a plan view of the disposable diaper according to the embodiment viewed from the skin surface side.
  • FIG. 2 is a plan view of the absorbent core according to the embodiment.
  • FIG. 3 is a schematic cross-sectional view taken along the line AA of the disposable diaper shown in FIG.
  • FIG. 4 is a diagram schematically showing a state in which a wearer wearing a disposable diaper has legs lowered.
  • FIG. 5 is a diagram schematically showing the disposable diaper in which the wearer wears the disposable diaper and the leg is raised, and the wearer raises the leg.
  • FIG. 6 is a diagram schematically showing the disposable diaper in a state where the wearer raises the legs and closes the legs.
  • FIG. 7 is a schematic cross section along the front-back direction of the disposable diaper in the state which the wearer lowered the leg.
  • FIG. 8 is a schematic cross section along the front-back direction of the disposable diaper in the state which the wearer raised the leg.
  • FIG. 9 is a plan view showing an absorbent core according to a modified example.
  • the disposable diaper which concerns on one aspect has the front-back waist region, the back waist region, and the crotch region arrange
  • An absorption core disposed in a region, a fastening tape disposed in the rear waistline region and capable of being fixed to the front waistline region, and a waistline extending along the width direction in the front waistline region and the rear waistline region
  • a second virtual line extending in a direction and a third virtual line passing through the centers of the first virtual line and the second virtual line in the front-rear direction and extending in the width direction are set, the deformation base point portion At least a part is provided in the abdominal region between the first virtual line and the third virtual line.
  • the inward force in the width direction and the inward force in the width direction are likely to be applied to the front region between the first virtual line and the second virtual line in the front-rear direction.
  • the abdominal region which is the front half of the front region, faces the front bulge of the leg, and therefore, when the wearer raises the leg or closes the leg, the abdominal region receives a force to pull the leg forward.
  • the wearer closes the legs the wearer is likely to receive a force that is pressed inward in the width direction. Since the girth holding region of the disposable diaper is in close contact with the body, the abdominal region is deformed with the rear end edge of the girth holding region as a base point.
  • the absorbent core in the abdominal region is deformed even when the deformation base point portion is set as the base point.
  • the deformation base point portion extends outward in the width direction toward the front side and is arranged so as to face the force applied by the movement of the leg. Therefore, the absorbent core in the abdominal region deforms with the deformation base point portion as a base point according to the movement of the leg.
  • the front end edge of the deformation base point portion may be separated from the first virtual line in the front-rear direction.
  • the deformation base point of the absorbent core can be formed at a position apart from the waistline holding region in the front-rear direction. It is possible to suppress the positional displacement in the waistline holding region and suppress the positional displacement of the entire disposable diaper.
  • the deformation base point portion can be provided in the vicinity of the leg-surrounding opening portion where the force of the wearer's leg is likely to act, and the deformation base point corresponding to the movement of the leg is more easily formed.
  • the front end edge of the deformation base point portion is It may be located in front of the fourth virtual line.
  • the front abdominal region the region between the first imaginary line and the fourth imaginary line
  • the absorbent core is easily deformed with the deformation base point portion as a base point when the leg is lifted.
  • the front end edge of the deformation base point portion is It may be located behind the fourth imaginary line.
  • the force is particularly likely to be applied to the area behind the fourth virtual line.
  • the front end edge of the deformation base point portion is located on the rear side of the fourth imaginary line, the absorbent core easily deforms with the deformation base point portion as a base point when the legs are closed. By controlling the deformation when the legs are closed, the deformation easily returns to the original position according to the movement of the legs thereafter, and it is easy to keep the body covered with the absorbent core and suppress the leakage.
  • the absorbent core has a pair of side regions located on both sides in the width direction of a region obtained by dividing the entire region of the absorbent core in the width direction into four equal parts.
  • the outer edge of the base point may be located in the side region.
  • the side region of the absorbent core is located near the leg and is likely to receive the force of the leg. Since the deformation base point portion is located in the side area of the absorbent core, the absorbent core is easily deformed with the deformation base point portion as a base point according to the movement of the leg. Further, the force applied to the deformation base point portion is transmitted along the deformation base point portion on the extension line of the deformation base point portion.
  • the deformation base point portion Since the deformation base point portion is located in the side area of the absorbent core, the deformation base point of the deformation base point portion easily reaches the outer edge of the absorbent core. When the deformation base point reaches the outer edge of the absorbent core, the fold line due to the deformation base point is stably formed, and the intended deformed state of the absorbent core is easily maintained.
  • the absorbent core has a pair of central regions located on a central side in the width direction among regions obtained by dividing the entire region of the absorbent core in the width direction into four equal parts.
  • the inner edge of the part may be located in the central region.
  • the force applied to the outer edge of the absorbent core by the movement of the leg can be guided to the center side in the width direction of the absorbent core. Deformation can be controlled over the entire width of the absorbent core, and unintended deformation can be suppressed.
  • the length of each deformation base point portion in the width direction may be 1 ⁇ 4 or more of the entire area of the absorbent core in the width direction. According to this aspect, the deformation can be controlled over the entire width direction of the absorbent core, and the unintended deformation can be suppressed.
  • the crotch deformation guide portion extends in the front-rear direction across the second virtual line and guides the deformation of the absorbent core in the thickness direction, and the deformation base point portion is the crotch part. It may be arranged on a guide extension line extending from the front end edge of the deformation guide portion to the front side. According to this aspect, the deformation base point portion extends in the width direction, and the deformation extending in the front-rear direction from the crotch deformation guide portion can be separated.
  • the absorbent core can be deformed according to the crotch and the abdomen.
  • the deformation intersection point where the deformation extension lines extending along the deformation base point portion from the respective deformation base point portions forming the pair of deformation base point portions intersect is located on the front side of the third virtual line.
  • the deformation based on each deformation base point portion extends to the crotch side along the deformation extension line, and intersects at the deformation intersection of the pair of deformation extension lines. The region sandwiched by the deformation extension lines is deformed so as to bulge with respect to the body by being sandwiched by both legs.
  • the region sandwiched by the deformation extension lines can cover the bulge on the lower side (groin side) than the depression of the lower abdominal portion. Since the deformation intersection is not located on the rear side of the third imaginary line, the deformation that bulges with respect to the body via the deformation base point does not easily reach the crotch, and the absorbability for the crotch is easily secured.
  • the front end edge of the deformation base point portion is separated from the first virtual line in the front-rear direction, passing through the center of the first virtual line and the third virtual line in the front-rear direction,
  • the deformation intersection may be located on the front side of the fourth imaginary line.
  • the front abdominal region the region between the first imaginary line and the fourth imaginary line
  • the deformation intersection point becomes the fourth virtual line. It may be located on the rear side with respect to.
  • the force that is pressed inward in the width direction is likely to be applied to the region behind the fourth imaginary line. This inward force in the width direction acts not only on the rear abdominal region but also on the rear side of the rear abdominal region.
  • the region sandwiched by the deformation extension lines is provided on the rear side of the rear abdomen region, and the deformation of the absorbent core can be controlled even in the region facing the crotch.
  • the core intersection point at which the deformation extension line extending from each deformation base point portion along the deformation base point portion and the outer edge of the absorbent core intersect is located rearward of the first virtual line. You can do it.
  • the deformation with the deformation base point portion as the base point extends along the deformation extension line and is easily transmitted to the outer edge of the absorbent core. Since the core intersection is located on the rear side of the first imaginary line, the deformation of the absorbent core due to the deformation base point is difficult to be transmitted to the waistline holding region, and the waistline can be maintained.
  • the maximum width of the deformation base point portion may be longer than the thickness of the absorbent core in a region close to the deformation base point portion. According to this aspect, it is easy to deform the absorbent core with the deformation base portion as the base point over the entire area in the thickness direction, and it is easier to realize the intended deformation.
  • a high-rigidity portion having higher rigidity than a region outside the deformation base point portion in the width direction may be provided between the pair of deformation base point portions.
  • the high-rigidity portion since the high-rigidity portion is provided between the deformation base points, a difference in rigidity occurs between a region outside the deformation base point portion in the width direction and a region inside the deformation base point portion, and the deformation occurs. The absorbent core is more easily deformed from the base point.
  • the high-rigidity portion makes it difficult for the deformation base point portion to deform, and it is easy to maintain the deformation from the deformation base point portion.
  • it becomes difficult for the region between the deformation base point portions to have a width, and the length in the width direction of the region between the pair of deformation base point portions can be secured, and leakage can be suppressed.
  • the pair of deformation base point portions may be continuous in the width direction. According to this aspect, when pressed from both sides in the width direction by both legs, the pair of deformation base point portions interfere with each other, and it is easy to maintain the deformation based on the deformation base point portions. In addition, the area between the deformation base point portions does not easily fit into the width, and the length in the width direction of the area between the pair of deformation base point portions can be secured and leakage can be suppressed.
  • a stretchable member that expands and contracts in the width direction may be provided outside the front and rear inner ends of the waistline holding region in the front and rear direction.
  • the closeness of the waistline holding region to the body can be enhanced, and even if the crotch region moves in the front-rear direction due to the movement of the legs, it is possible to suppress the displacement of the waistline holding region in the front-rear direction. Therefore, even when repeated lifting and lowering operations of the legs are performed, displacement of the entire absorbent core is suppressed, and the absorbent core is deformed based on the deformation base point portion according to the movement of the legs to cover the body. Easy to continue.
  • a waist rigidity region having higher rigidity than a region extending rearward from the first virtual line may be provided on the front side of the first virtual line.
  • the waist rigid region can suppress deformation of the waistline holding region, the waistline holding region can continuously cover the waist of the wearer, and the abdominal bulge can be continuously covered.
  • the pair of deformation base point portions includes a pair of first deformation base point portions and a pair of second deformation base point portions located rearward of the pair of first deformation base point portions. You can do it.
  • the absorbent core is deformed with the first deformation base point portion located on the front side as a base point.
  • the wearer closes the legs or a force is applied inward in the width direction, the region deformed with the first deformation base point portion as a base point is deformed with the second deformation base point portion as a base point.
  • the second deformation base point portion can also control the deformation of the region deformed with the first deformation base point portion as a base point.
  • the first angle of the first deformation base point portion with respect to the width direction may be smaller than the second angle of the second deformation base point portion with respect to the width direction.
  • the first deformation base point portion located on the front side is more likely to be acted upon by the force that is pulled up to the ventral side than the force that is pressed inward in the width direction.
  • the second deformation base point portion located on the rear side is more likely to be acted upon by a force pressed inward in the width direction than the first deformation base point portion.
  • the absorbent core is more likely to be deformed with the deformation base point part as a base point, and the deformation of the absorbent core can be controlled more.
  • a first deformation extension line extending from the first deformation base point portion along the first deformation base point portion and a second deformation extension extending from the second deformation base point portion along the second deformation base point portion.
  • the extension lines may intersect at the outer side in the width direction with respect to the outer edge of the absorbent core.
  • the first deformation base point portion and the second deformation base point portion may be separated from each other in the front-rear direction. According to this aspect, it becomes difficult for the deformation caused by the first deformation base point portion and the deformation caused by the second deformation base point portion to interfere with each other, and each can form an independent base point.
  • the disposable diaper is a tape type disposable diaper.
  • FIG. 1 is a plan view of the disposable diaper 10 according to the present embodiment as viewed from the skin surface side
  • FIG. 2 is a plan view of the absorbent core according to the embodiment as viewed from the skin surface side.
  • the plan views shown in FIGS. 1 and 2 show the disposable diaper in an expanded state.
  • FIG. 3 is a schematic cross-sectional view taken along the line AA of the disposable diaper shown in FIG.
  • the stretched state in the present invention is a state in which the disposable diaper 10 is stretched to a state in which wrinkles are not formed.
  • the natural state in the present invention means, in the case of the disposable diaper 10 housed in the package, the disposable diaper 10 is taken out from the package, and the atmosphere is kept at 20 ° C. ⁇ 2 ° C. and a relative humidity of 60% ⁇ 5% RH. It is in a state of being left for 24 hours.
  • the disposable diaper 10 has a front-back direction L and a width direction W orthogonal to each other.
  • the front-back direction L is defined by the direction extending to the front side of the body and the back side of the body.
  • the front-rear direction L is a direction that extends in the front-rear direction in the deployed disposable diaper 10.
  • the disposable diaper 10 has a thickness direction T orthogonal to both the front-rear direction L and the width direction W.
  • the thickness direction T extends to a skin surface side T1 facing the wearer side and a non-skin surface side T2 opposite to the skin surface side.
  • the disposable diaper 10 has a front waistline region S1, a back waistline region S2, and a crotch region S3.
  • the front waistline region S1 is a region facing the front waistline (abdomen) of the wearer.
  • the back waistline region S2 is a region facing the back waistline (back part) of the wearer, and includes a region on which the body (buttock) is placed when worn.
  • the crotch region S3 is located in the crotch of the wearer and is a region arranged between the front waistline region S1 and the rear waistline region S2.
  • the crotch region S3 is a region in which leg openings 65 arranged around the legs of the wearer are provided.
  • the leg openings 65 are portions that are recessed inward in the width direction from the outer edge of the disposable diaper.
  • the disposable diaper 10 includes an absorbent core 31 containing an absorbent material.
  • the absorbent core 31 may be disposed at least in the crotch region S3, may be disposed in the front waistline region S1, and may be also disposed in the rear waistline region S2.
  • the absorbent core 31 comprises an absorbent material such as ground pulp or super absorbent polymer (SAP), or mixtures thereof.
  • the absorbent core 31 may be covered by the core wrap 32.
  • the absorber 30 may be configured by the absorbent core 31 and the core wrap 32.
  • the core wrap 32 may be made of tissue and may be disposed on the skin surface side T1 of the absorbent core 31 and the non-skin surface side T2 of the absorbent core.
  • a surface sheet 21 and a side sheet 22 may be provided on the skin side T1 of the absorbent body 30 including the absorbent core 31.
  • the topsheet 21 may be disposed across the center of the absorber 30 in the width direction W.
  • the side sheet 22 may be arranged so as to cover the outer side portion of the top sheet 21.
  • the topsheet 21 and the sidesheets 22 may be made of a liquid-permeable sheet such as a nonwoven fabric or a perforated plastic film.
  • the inner portion of the side seat 22 may be folded back and overlapped.
  • a leak-proof stretchable portion 43 that stretches in the front-rear direction L may be provided between the overlapping side seats 22.
  • the leak-proof stretchable portion 43 may be made of rubber thread that stretches in the front-rear direction L.
  • the side sheet 22 and the leak-proof stretchable portion 43 constitute a leak-proof gather that stands up on the skin surface side T1 when worn.
  • the back sheet 23 and the exterior sheet 24 may be provided on the non-skin surface side T2 of the absorber 30.
  • the exterior sheet 24 may be provided on the non-skin surface side T2 of the back sheet 23.
  • the length of the back sheet 23 in the width direction W is shorter than the length of the exterior sheet 24 in the width direction W, and the length of the back sheet 23 in the front-rear direction L is shorter than the length of the exterior sheet 24 in the front-rear direction L.
  • the back sheet 23 may be made of a liquid impermeable film.
  • the exterior sheet 24 may be made of a liquid-permeable nonwoven fabric.
  • Fastening tape 91 is provided in the rear waistline area S2.
  • the fastening tape 91 is arranged in the rear waistline region S2 and can be fixed to the front waistline region S1.
  • the fastening tape 91 has a base portion 92 and a locking portion 93.
  • the base portion 92 is arranged between the exterior sheet 24 and the side sheet 22 in the thickness direction T, and extends outward from the exterior sheet 24 and the side sheet 22 in the width direction W.
  • the locking portion 93 is disposed on the base portion 92 and may engage with the target portion 95.
  • the target portions 95 are arranged at intervals in the width direction W in the front waistline region S1, and are configured such that the fastening tapes 91 are fixed to each other.
  • the disposable diaper may not include the target portion, and the locking portion 93 may be fixed to the exterior sheet in the front waistline region.
  • the disposable diaper has a waistline holding region 60.
  • the waistline holding region 60 is a region that is in close contact with the wearer's waistline in a worn state, and is a region that extends in the width direction W from the fastening portion 93 of the fastening tape.
  • the waistline holding region 60 in the rear waistline region S2 is a region extending in the width direction W from the locking portion 93 of the fastening tape 91.
  • the waistline holding region 60 in the front waistline region S1 and the waistline holding region 60 in the rear waistline region pass through the center of the disposable diaper in the front-rear direction and extend in the width direction W in the front-rear centerline (second virtual line described below) 10LC. It becomes line symmetric with respect to.
  • the distance between the front end edge of the waistline holding region 60 and the front-rear centerline 10LC in the front waistline region S1 matches the distance between the front end edge of the waistline holding region 60 and the front-rear centerline 10LC in the rear waistline region S2.
  • the waistline holding region is shown by hatching.
  • the disposable diaper 10 may have a leg elastic part 42 that expands and contracts in the front-rear direction outside the absorbent core 31 in the width direction W.
  • the leg stretchable portion 42 may be provided between the side sheet 22 and the back sheet 23, and between the side sheet 22 and the exterior sheet 24.
  • the leg stretchable portion 42 is configured by a belt-shaped stretchable sheet that stretches in the front-rear direction L. Due to the contraction of the leg elastic part 42, the leg opening of the disposable diaper 10 fits around the leg when worn.
  • the disposable diaper 10 may have a waist elastic part 45 extending in the width direction W along the rear edge of the disposable diaper.
  • the waist elastic part 45 constitutes the elastic member of the present invention.
  • the waist elastic part 45 may be provided between the back sheet 23 and the exterior sheet 24, between the top sheet 21 and the exterior sheet 24, and between the side sheet 22 and the exterior sheet 24.
  • the rear end edge of the waist elastic part 45 may be located in front of the rear edge of the disposable diaper, and the front end edge of the waist elastic part 45 may be located in front of the rear edge of the absorbent core 31.
  • the waist elastic part 45 may extend outside the absorbent core 31 in the width direction W.
  • the waist elastic part 45 is configured by a belt-shaped elastic sheet that expands and contracts in the width direction W.
  • the disposable diaper 10 may have a pair of crotch elastic portions 41 provided in a region of the crotch region that overlaps with the absorbent core 31.
  • the crotch elastic part 41 may form the crotch deformation guide part 85 of the present invention.
  • the crotch elastic part 41 may be arranged on the non-skin surface side of the absorber 30.
  • the crotch stretchable portion 41 may be arranged between the absorbent core 31 and the back sheet 23, or may be provided between the core wrap 32 arranged on the non-skin surface side T2 of the absorbent core 31 and the back sheet 23. Alternatively, it may be provided between the back sheet 23 and the exterior sheet 24.
  • the crotch stretchable portion 41 of the present embodiment is arranged between the back sheet 23 and the exterior sheet 24.
  • the crotch stretchable portions 41 extend in the front-rear direction L and are arranged at intervals in the width direction W.
  • the crotch stretchable portions 41 are not arranged at the center of the absorbent core 31 in the width direction W, but two at each side of the absorbent core 31 with respect to the center of the absorbent core 31 in the width direction W.
  • the crotch stretchable portion 41 is made of rubber thread arranged along the front-rear direction L.
  • the crotch elastic part 41 may be configured by a belt-shaped elastic sheet that stretches in the front-back direction, may be configured by one thread rubber, or may be configured by three or more thread rubbers. It may be configured.
  • the inseam stretchable portion 41 may straddle the front-rear centerline 10LC. By contracting the crotch elastic part 41, the front-rear centerline 10LC can be pulled up to the body side.
  • the crotch stretchable portion 41 may be arranged only on the front side of the front-rear centerline 10LC without straddling the front-rear centerline 10LC, or only on the rear side of the front-rear centerline 10LC. It may be arranged in.
  • At least a part of the crotch elastic part 41 is located inside the outer edge of the absorbent core 31 in the width direction W in the narrow part 35 described later. At least a part of the crotch stretchable portion 41 is arranged within the narrow portion 35 in the front-rear direction. The rear end edge of the crotch stretchable portion 41 is arranged in front of the rear end edge of the narrow portion 35. Further, the front end edge of the crotch stretchable portion 41 may be arranged rearward of the front end edge of the narrow portion 35.
  • the absorbent core 31 in the crotch region S3 is pulled up to the body side by the contraction of the crotch elastic part 41.
  • a pair of inseam stretchable portions 41 are located on both outer sides of the center in the width direction W, and a region that overlaps with the inseam stretchable portion 41 is pulled up by contraction of the inseam stretchable portion 41, and is sandwiched by the left and right inseam stretchable portions 41. Is pulled up while maintaining a flat shape along the body.
  • the pair of crotch stretchable portions 41 are located inside the outer edge 31E of the absorbent core 31 in the width direction W, and the region located between the pair of crotch stretchable portions 41 is more widthwise W than the pair of crotch stretchable portions 41.
  • the center of the absorbent core in the width direction W is deformed into a convex shape with the side portion as a base point, and the fit property to the crotch of the body can be secured.
  • the stretchable portion including the leg stretchable portion 42, the leak-proof stretchable portion 43, the waist stretchable portion 45, and the crotch stretchable portion 41 in the present invention are arranged in a state in which an elastic member such as a rubber thread or a stretchable sheet can stretch. It does not include a portion in which the elastic member is arranged in a non-expandable state. That is, the stretchable portion is the effective length portion of the elastic member that constitutes the stretchable portion.
  • the crotch stretchable portion 41 may be arranged only on the front side of the front-rear centerline 10LC without straddling the front-rear centerline 10LC, or only on the rear side of the front-rear centerline 10LC. It may be arranged in.
  • the outer side portion in the present invention is a portion occupying a certain range in the width direction W including the outer side edge in the width direction W, and the outer side edge is the outer side edge in the width direction W.
  • the inner side portion is a portion that occupies a certain range in the width direction W including the inner side edge in the width direction W, and the inner side edge is the inner side edge in the width direction W.
  • the outer edge is an outer edge in the front-rear direction
  • the inner edge is an inner edge in the front-rear direction.
  • the overlapping state is a state in which one member and the other member are overlapped in a plan view, and the other member is arranged on the skin surface side or the non-skin surface side of the one member. It is in a state of being.
  • the overlapping state includes not only a state in which one member and the other member are in contact with each other, but also a configuration in which another member is interposed between the one member and the other member.
  • the disposable diaper 10 has a front region R10 and an abdominal region R20.
  • the front region R10 and the abdomen region R20 are provided between the waistline holding region 60 and the front-rear centerline 10LC.
  • a first virtual line VL1 passing through the rear end edge of the waistline holding region 60 in the front waistline region and extending in the width direction W
  • a second virtual line VL2 passing through the center of the disposable diaper in the front-rear direction and extending in the width direction W
  • a third virtual line VL3 passing through the center of the first virtual line VL1 and the second virtual line VL2 in the front-rear direction L and extending in the width direction W
  • a center of the first virtual line VL1 and the third virtual line VL3 in the front-rear direction L and a center of the first virtual line VL1 and the third virtual line VL3 in the front-rear direction L.
  • the front region R10 is a region between the first virtual line VL1 and the second virtual line VL2.
  • the second virtual line VL2 matches the front-rear centerline 10LC.
  • the abdominal region R20 is a region between the first virtual line VL1 and the third virtual line VL3.
  • the abdominal region R20 is the front half region of the front region R10.
  • the abdominal region R20 has a front abdominal region R21 and a rear abdominal region R22.
  • the front abdomen region R21 is a front half region of the abdomen region R20 and is a region between the first virtual line VL1 and the fourth virtual line VL4.
  • the rear abdominal region R22 is a rear half region of the abdominal region R20, and is a region between the third virtual line VL3 and the fourth virtual line VL4.
  • the disposable diaper according to the present invention is configured to control the deformation of the absorbent core in the front region R10 when the wearer moves the leg. The deformation mode when worn will be described in detail later.
  • the absorbent core 31 has a region obtained by dividing the entire region of the absorbent core in the width direction W into four equal parts.
  • the four-divided region has a pair of side regions 31S located on both sides in the width direction W and a pair of central regions 31C.
  • the pair of central regions 31C are arranged on both sides of the center of the absorbent core in the width direction W.
  • the pair of side regions 31S are arranged on both sides of the central region 31C in the width direction W.
  • the absorbent core 31 has a narrow portion 35 whose length in the width direction W is shorter than the maximum width 31M of the absorbent core 31, and a wide portion arranged outside the narrow portion 35 in the front-rear direction.
  • the narrow portion 35 is arranged between the wide portions arranged at the front and rear.
  • the length of the narrow portion 35 in the width direction W increases toward the outside in the front-rear direction L.
  • the shape of the absorbent core 31 in plan view is an hourglass shape.
  • the shape of the absorbent body including the core wrap may be an hourglass shape.
  • the absorbent core 31 may have a low basis weight portion 33 in which the basis weight of the absorbent material is lower than the surrounding area.
  • the low basis weight portion 33 may constitute the crotch deformation guide portion 85 of the present invention.
  • the low grammage portion 33 is provided along the front-rear direction L.
  • the low basis weight portion 33 may extend in the front-rear direction L, may be parallel to the front-rear direction L, or may be inclined at an angle of less than 90 degrees with respect to the front-rear direction L.
  • the low basis weight portion 33 is a portion where the basis weight of the absorbent material is lower than that of the surrounding absorbent core 31, is thinner than the surrounding absorbent core 31, and has low rigidity. Therefore, the low grammage portion 33 is likely to become a deformation base point in the mounted state. A deformation base point that extends in the front-rear direction in the worn state is easily formed on the absorbent core 31.
  • the low grammage portion 33 may be a portion where the grammage of the absorbent material is substantially zero (the grammage of design is 0, but includes a portion where the surrounding absorbent material is mixed), or the surrounding area. It may be a portion where the absorbent material having a smaller basis weight is arranged.
  • the low basis weight portion 33 may be a slit having a constant length in the width direction W, or may be a notch in which the length in the width direction W is practically zero.
  • the length of each low basis weight portion 33 in the width direction W may be 2 mm or more and 10 mm or less, and more preferably the thickness of the absorbent core 31 or more and 8 mm or less. Since the length of the low basis weight portion 33 in the width direction W is equal to or greater than the thickness of the absorbent core 31, the absorbent core 31 is easily deformed in the thickness direction with the low basis weight portion 33 as a base point.
  • the length of the low basis weight portion 33 in the width direction W is 8 mm or less, it is possible to suppress the anxiety about the absorption performance due to the long length of the low basis weight portion 33 in the width direction W.
  • the length of 33 in the front-rear direction L may be 30 mm or more and 180 mm or less.
  • the low basis weight portions 33 are arranged in a pair in the width direction W at intervals.
  • the low grammage portion 33 is provided in the central region 31C.
  • the low grammage portions 33 may be arranged at intervals in the width direction W on both sides of the width center line 10WC passing through the center of the disposable diaper in the width direction and extending in the front-rear direction.
  • the center of the low basis weight portion 33 in the front-rear direction may be arranged rearward of the front-rear centerline 10LC.
  • the front edge 33F of the low basis weight portion 33 may be located in front of the front edge of the crotch elastic portion 41, and the rear edge 33R of the low basis weight portion 33 matches the rear edge of the crotch elastic portion 41 or It may be located in front of the rear edge.
  • the outer edge of the low basis weight portion 33 may be aligned with the thread rubber located outside the width direction W in the thread rubber forming the crotch stretchable portion 41 in the width direction W, and the inner edge of the low basis weight portion 33.
  • In the width direction W may match the thread rubber that is positioned inside the width direction W among the thread rubber that forms the crotch stretchable portion 41.
  • the low basis weight portion 33 may be arranged in a region overlapping with the crotch stretchable portion 41.
  • the absorbent core 31 is deformed with a low basis weight portion extending in the front-rear direction when worn as a base point. Therefore, due to the contraction of the crotch stretchable portion 41, the absorbent core 31 is easily deformed by the convex shape toward the body side, and the absorbent core 31 can be properly accommodated in the crotch of the wearer.
  • the low grammage portion 33 which serves as a deformation starting point of the absorbent core 31, has a grammage lower than that of the surrounding region, can suppress the thickness even after absorbing body fluid, and can maintain a deformed state.
  • the measurement of the “basis weight of the absorbent core” in this specification shall be performed by the following measuring method.
  • a sample taken out from the package and left in that state for 12 hours in an atmosphere of 20 ° C. ⁇ 2 ° C. and a relative humidity of 60% ⁇ 5% RH is used.
  • the packaging sheet is opened and the folded disposable diaper is developed.
  • the part for measuring the basis weight is cut out from the disposable diaper, and the part other than the absorbent core such as the topsheet is removed from the cut out part.
  • the area and weight of the portion for measuring the basis weight of the absorbent core are measured. The basis weight is calculated based on the weight and the area.
  • the absorbent core 31 may be provided with a pair of deformation base points 80.
  • the deformation base point portions 80 extend outward in the width direction W toward the front side, and are arranged in a pair in the width direction W at intervals.
  • the pair of deformation base points 80 may be line-symmetric with respect to the width center line 10WC.
  • the deformation base point portion 80 may be the deformation base point of the absorbent core 31, and the embossed portion obtained by compressing the absorbent core in the thickness direction, the low basic weight portion in which the basic weight of the absorbent material is lower than the surroundings, and the absorbent material are arranged.
  • the slit may be formed by at least one of a slit and a cut portion obtained by cutting the absorbent core in the thickness direction.
  • the deformation base point portion 80 has a base point edge 80G that is an edge of the deformation base point.
  • the base point edge is an edge at which a polygonal line of the thickness of the absorbent core 31 is formed.
  • the base point edge 80G of the present embodiment is an edge extending in the width direction W at the deformation base point portion 80.
  • FIG. 4 is a diagram schematically showing a state in which a wearer wearing a disposable diaper has legs lowered.
  • FIG. 5 is the figure which showed typically the state which the wearer wearing the disposable diaper raised the leg.
  • FIG. 6 is a diagram schematically showing a state in which a wearer wearing a disposable diaper lifts his legs and closes his legs.
  • FIG. 7 is a schematic cross section along the front-back direction of the disposable diaper in the state which the wearer lowered the leg.
  • FIG. 8 is a schematic cross section along the front-back direction of the disposable diaper in the state which the wearer raised the leg. 7 and 8 show only the line of the entire disposable diaper, the deformation base point portion 80, and the fastening tape for convenience of description, and other members are omitted.
  • BL shown in Drawing 7 and Drawing 8 shows a line of a wearer's body.
  • the disposable diaper of the present invention is configured so that the deformation of the absorbent core 31 in the front region R10 is controlled by the deformation base point portion 80.
  • a recess extending in the width direction W is generally formed at the lower end of the abdomen.
  • the recess at the lower end of the abdomen is curved upward from the center in the width direction W toward the outside in the width direction W, and is particularly easily formed particularly in an infant.
  • the fastening tape is generally fastened in a position opposite the bulge of the wearer so that the disposable diaper can cover the bulge of the wearer's abdomen.
  • the leg openings 65 in the front waistline region S1 and the back waistline region S2 are arranged so as to surround the wearer's legs.
  • the wearer's legs are generally separated from the outer edge of the absorbent core 31, and the absorbent core 31 has an inner side in the width direction W. It is in a state where no force is applied to the inside or a slight force toward the inside in the width direction W is applied.
  • the disposable diaper is arranged along the bulge of the abdomen and the recess of the lower end of the abdomen.
  • the front region R10 is in a state in which no force is applied to the abdominal side by the legs or a slight force is applied to the anterior region.
  • the inward force in the width direction W and the inward force in the width direction W are likely to be applied to the front region R10.
  • the abdomen region R20 which is the front half of the front region R10, faces the front part of the leg that bulges toward the front side, the force that is pulled up to the front side when the wearer raises the leg or closes the leg.
  • the force of being pressed inward in the width direction W is also likely to be received.
  • the front region R10 is deformed with the rear end edge of the waistline holding region 60 as a base point.
  • the deformation base point portion 80 is provided in at least a part of the abdomen region R20 in the front region R10, and the absorbent core of the abdomen region R20 deforms with the deformation base point portion 80 as a base point.
  • the deformation base point portion 80 extends outward in the width direction W toward the front side and is arranged so as to face the force applied by the movement of the leg. Therefore, the absorbent core 31 in the abdomen region R20 deforms with the deformation base point portion 80 as a base point.
  • the base point edge 80G of the deformation base point portion 80 may extend outward in the width direction W toward the front side.
  • the base edge 80G of each deformation base point 80 may extend outward in the width direction W toward the front side.
  • the extension line connecting the base point portions constitutes the base point edge.
  • the base point edge 80G may be linear as in the present embodiment, or may be curved.
  • the deformation base point portion 80 may be provided at least in part in the abdominal region R20, may be provided only in the abdominal region R20, may extend from the abdominal region R20 to the front side, or the abdomen. It may extend from the region R20 to the rear side.
  • the front end edge 80F of the deformation base point portion 80 may be separated from the first virtual line VL1 in the front-rear direction L. That is, the deformation base point portion 80 may be provided only on the rear side of the first imaginary line VL1 and may be provided so as not to overlap the waistline holding region 60. According to this configuration, the deformation base point of the absorbent core 31 can be formed at a position separated from the waistline holding region 60 in the front-rear direction L. The position shift of the waistline holding region 60 can be suppressed, and the position shift of the entire disposable diaper can be suppressed. In addition, the deformation base point portion 80 can be provided in the vicinity of the crotch of the wearer, and the deformation base point corresponding to the movement of the leg is more easily formed.
  • the front end edge 80F of the deformation base point portion 80 may be located in front of the fourth virtual line VL4.
  • the first deformation base point portion 81 as the deformation base point portion 80 is arranged, and the front end edge 81F of the first deformation base point portion 81 is arranged.
  • the pair of first deformation base point portions 81 may be separated in the width direction and may be separated from the width center line 10WC.
  • the first deformation base point portion 81 may be separated from the outer edge of the absorbent core.
  • the absorbent core is easily deformed with the deformation base point portion 80 as a base point when the leg is lifted.
  • the front end edge 80F of the deformation base point portion 80 may be located on the rear side of the fourth virtual line VL4.
  • the second deformation base point portion 82 as the deformation base point portion 80 is arranged, and the front end edge 82F of the second deformation base point portion 82 is arranged.
  • the pair of second deformation base point portions 82 may be separated in the width direction and may be separated from the width center line 10WC.
  • the second deformation base point portion 82 may be separated from the outer edge of the absorbent core.
  • the absorbent core is easily deformed with the deformation base point portion 80 as a base point when the legs are closed.
  • the deformation easily returns to the original position according to the movement of the legs thereafter, and it is easy to keep the body covered with the absorbent core and suppress the leakage.
  • the rear end edge 80R of the deformation base point portion 80 may be on the front side of the second virtual line VL2, and more preferably on the front side of the third virtual line VL3.
  • the second virtual line VL2 and a region in the vicinity of the second virtual line VL2 in the front-rear direction are likely to be guided by the excrement from the excretion port, and are preferably arranged facing the excretion port. Since the rear end edge 80R of the deformation base point portion 80 is located on the front side of the third virtual line VL3, the absorbent core can be disposed so as to face the excretory opening and ensure the absorbent performance.
  • the deformation base point portion 80 may include a first deformation base point portion 81 and a second deformation base point portion 82.
  • the absorbent core 31 is deformed with the first deformation base point portion 81 located on the front side as a base point.
  • FIG. 6 when the wearer applies a force toward the inner side in the width direction W by closing the legs or the like, the region deformed with the first deformation base point portion 81 as a base point has the second deformation base point portion 82 as a base point. Transforms into.
  • the first deformation base point portion 81 when the first deformation base point portion 81 is deformed with respect to the base point and further pressed from the crotch region side to the front side, the first deformation base point portion 81 is already the deformation base point, and therefore moves to the front side. Instead, the region on the rear side of the first deformation base point portion 81 swells in the direction away from the wearer (see FIG. 8). At this time, since the second deformation base point portion 82 is on the rear side of the first deformation base point portion 81, the deformation base point by the second deformation base point portion 82 is further formed in the region bulging in the direction away from the wearer. It is also possible to control the deformation of the area that bulges away from the wearer. As shown in FIG.
  • the second deformation base point portion 82 moves toward the wearer side from the first deformation base point portion 81 side toward the second deformation base point portion 82 side. And the deformation that bulges toward the wearer from the second virtual line side toward the second deformation base point portion 82 side.
  • the deformation having the second deformation base point portion 82 as the apex can be supported, and the deformed state can be easily maintained.
  • the second deformation base point portion 82 can also control the deformation of the region deformed with the first deformation base point portion 81 as the base point.
  • the first angle ⁇ of the first deformation base point portion 81 with respect to the width direction W may be smaller than the second angle ⁇ of the second deformation base point portion 82 with respect to the width direction W.
  • the first deformation base point portion 81 is more likely to be acted on by the abdomen than the force pressed inward in the width direction W, and the second deformation base point portion 82 is wider than the first deformation base point portion 81 in the width direction W.
  • the force of being pressed inward is easy to act.
  • the absorption core is more easily deformed with the deformation base point portion as the base point, and the deformation of the absorption core can be controlled more.
  • the first deformation base point portion 81 and the second deformation base point portion 82 may be separated in the front-rear direction L. According to this configuration, it becomes difficult for the deformation by the first deformation base point portion 81 and the deformation by the second deformation base point portion 82 to interfere with each other, and each can form an independent base point.
  • a first deformation extension line EL1 extending from the first deformation base point portion 81 along the first deformation base point portion 81 and a second deformation extension line extending from the second deformation base point portion 82 along the second deformation base point portion 82.
  • the extension line EL2 may intersect outside the outer edge 31E of the absorbent core in the width direction W. That is, the first deformation extension line EL1 and the second deformation extension line EL2 do not intersect inside the outer edge 31E of the absorbent core 31 in the width direction W.
  • the first deformation extension line EL1 and the second deformation extension line EL2 are lines extending along the base point edge 80G.
  • the deformation by the first deformation base point portion 81 and the deformation by the second deformation base point portion 82 can be released to the outer edge 31E of the absorbent core. It becomes difficult for the deformation by the first deformation base point portion 81 and the deformation by the second deformation base point portion 82 to interfere with each other, and it becomes easy to realize the deformation state with each of them as the base point.
  • the outer edge 80E of the deformation base point portion 80 may be located in the side area.
  • the outer edge 81E of the first deformation base point portion 81 of the present embodiment is located in the side area 31S
  • the outer edge 82E of the second deformation base point portion 82 is located in the central area 31C.
  • the side region 31S is located near the leg and is likely to receive the force of the leg. Since the deformation base point portion is located in the side area of the absorbent core, the absorbent core is easily deformed with the deformation base point portion as a base point according to the movement of the leg. Further, the force applied to the deformation base point portion is transmitted along the deformation base point portion on the extension line of the deformation base point portion.
  • the deformation base point of the deformation base point portion easily reaches the outer edge of the absorbent core.
  • the deformation base point is stabilized, and the intended deformed state of the absorbent core is easily maintained.
  • the outer edge 80E of the deformation base point portion 80 may reach the outer edge of the absorbent core or may be separated from the outer edge of the absorbent core.
  • the outer edge of the deformation starting point may be separated from the outer edge of the absorbent core. It is possible to suppress the force of the leg from being directly transmitted to the deformation base point portion and prevent the absorbent core from being excessively deformed with the deformation base point portion as a base point.
  • the inner edge 80I of the deformation base point portion 80 may be located in the central region 31C.
  • the inner edge 81I of the first deformation base point portion 81 and the inner edge 82I of the second deformation base point portion 82 of the present embodiment are located in the central region 31C.
  • the length of each deformation base point portion in the width direction W may be 1 ⁇ 4 or more of the entire width direction W of the absorbent core 31.
  • the length in the width direction W of each deformation base point portion is the length in the width direction W of each deformation base point portion that configures the pair of deformation base point portions, and for example, each length that configures the pair of first deformation base point portions 81.
  • This is the length of the first deformation base point portion 81 in the width direction W. Therefore, the length of the pair of deformation base points in the width direction W is 1/2 or more of the entire area of the absorbent core 31 in the width direction W. According to this configuration, since the deformation base point portion is arranged in half or more of the entire area of the absorbent core 31 in the width direction W, the deformation can be controlled over the entire absorbent core 31, and unintended deformation can be suppressed.
  • the disposable diaper may have a crotch deformation guide portion 85 that extends in the front-rear direction L across the second virtual line VL2 and guides the deformation of the absorbent core in the thickness direction.
  • a crotch deformation guide portion 85 that extends in the front-rear direction L across the second virtual line VL2 and guides the deformation of the absorbent core in the thickness direction.
  • the crotch deformation guide portion 85 includes a low basis weight portion having a low basis weight of the absorbent material, an embossed portion obtained by compressing the absorbent core and the like in the thickness direction, and an elastic member arranged to overlap the absorbent core in the thickness direction.
  • the crotch deformation guide portion 85 of the present embodiment includes the low basis weight portion 33 formed in the absorbent core 31 and the crotch stretchable portion 41 arranged on the non-skin surface side T2 with respect to the absorbent core. It is composed by.
  • the deformation base point portion 80 may be arranged on a guide extension line EL3 extending from the front end edge of the crotch deformation guide portion 85 to the front side.
  • the deformation base point portion 80 extends in the width direction W and can divide the deformation extending from the crotch deformation guide portion 85 in the front-rear direction L.
  • the absorbent core can be deformed according to the crotch and the abdomen.
  • the deformation intersection point P1 between the deformation extension lines extending along the deformation base point portion from each of the deformation base point portions forming the pair of deformation base point portions may be located in front of the third virtual line VL3.
  • the deformation extension line extending from each deformation base point portion along the deformation base point portion extends inward in the width direction W from the deformation base point portion toward the rear side.
  • the deformation intersection P1 is an intersection where the deformation extension lines in the pair of deformation base points intersect with each other, and is located rearward of the deformation base points.
  • the deformation intersection P1 is located on the width center line 10WC when the pair of deformation base points are line-symmetric with respect to the width center line 10WC.
  • the deformation intersection P11 between the first deformation extension lines EL1 is located on the front side of the third virtual line VL3, and the deformation between the second deformation extension lines EL2.
  • the intersection P12 is located behind the third virtual line VL3.
  • the deformation with each deformation base point as the base point extends to the crotch side along the deformation extension line and intersects at the deformation intersection point P1.
  • the region sandwiched by the deformation extension lines is deformed so as to bulge with respect to the body by being sandwiched by both legs. As shown in FIG. 8, when the first deformation base point portion 81 is located in the vicinity of the depression of the lower abdomen, the region sandwiched by the deformation extension lines covers the bulge on the lower side (groin side) than the depression of the lower abdominal portion.
  • the deformation intersection point P1 is not located on the rear side of the third virtual line VL3, the deformation that bulges with respect to the body from the deformation base point portion 80 as the base point does not easily reach the crotch and the absorbability for the crotch is easily secured.
  • the deformation intersection P1 may be located in front of the fourth virtual line VL4.
  • the deformation intersection P11 of the first deformation base point portion 81 is located on the front side of the fourth virtual line VL4, and the front edge 81F of the first deformation base point portion 81 is separated from the first virtual line VL1. is doing. Therefore, the inclination of the first deformation base point portion 81 with respect to the width direction W becomes gentle.
  • the front abdominal region R21 is likely to receive a force that is pulled up to the abdominal side when the wearer raises his legs.
  • the deformation intersection P1 may be located on the rear side of the fourth virtual line.
  • the deformation intersection P12 of the second deformation base point portion 82 is located behind the fourth virtual line VL4.
  • the rear abdomen region is likely to receive a force that is pressed inward in the width direction W when the wearer closes the legs. This inward force in the width direction W acts not only on the rear abdominal region but also on the rear side of the rear abdominal region.
  • the region sandwiched by the deformation extension lines is provided on the rear side of the rear abdomen region, and the deformation of the absorbent core can be controlled even in the region facing the crotch.
  • the core intersection point P2 at which the deformation extension line extending from each deformation base point portion along the deformation base point portion and the outer edge of the absorbent core intersect may be located behind the first virtual line VL1. That is, the core intersection point P2 may be separated from the first virtual line VL1.
  • P22 and P22 are located behind the first virtual line VL1.
  • the deformation based on the deformation base point portion 80 extends along the deformation extension line and is easily transmitted to the outer edge 31E of the absorbent core 31. Since the core intersection is located on the rear side of the first virtual line VL1, the deformation of the absorbent core 31 by the deformation base point portion 80 is difficult to be transmitted to the waistline holding region 60, and the state of holding the waistline can be maintained.
  • the maximum width TM of the deformation base point portion 80 is longer than the thickness of the absorbent core 31 in the region close to the deformation base point portion 80.
  • the width of the deformation base point portion 80 is the length in the direction orthogonal to the direction in which the deformation base point portion 80 extends, and shows the maximum width TM of the deformation base point portion 80 in FIG. 2. Since the maximum width TM of the deformation base point portion 80 is thicker than the thickness of the absorbent core 31, the absorbent core 31 is likely to be deformed with the deformation base point portion 80 as a base point over the entire area in the thickness direction T, and it is easier to realize the intended deformation. Become.
  • the portion where the width of the deformation base point portion 80 is longer than the thickness of the absorbent core 31 occupies more than half of the deformation base point portion 80. Is preferred.
  • the entire area of the absorbent core 31 in the thickness direction T is likely to be deformed in a portion of the deformation base point portion 80 which is half or more.
  • An elastic member that expands and contracts in the width direction W may be provided outside the inner end edge of the waistline holding region 60 in the front-rear direction L in the front-rear direction L.
  • An inner edge of the waistline holding region 60 in the front-rear direction L includes a rear edge of the waistline holding region 60 in the front waistline region S1 and a front edge of the waistline holding region 60 in the rear waistline region S2.
  • the waist elastic part 45 as an elastic member is arranged on the rear side of the waistline holding region 60 in the rear waistline region S2, behind the front end edge.
  • the waist elastic part 45 as the elastic member may be disposed at least in an area outside the front and rear direction L of the inner peripheral edge of the waist peripheral holding area 60 in the front and rear direction L. It may be arranged inside the front and rear direction L rather than the inner end edge in the front and rear direction L of the waistline holding region 60 across the inner end edge in the direction L.
  • Adhesion of the waistline holding region 60 to the body is enhanced by the waistline stretching portion 45, and even if the crotch region S3 moves in the front-rear direction L due to the movement of the legs, displacement of the waistline holding region 60 in the front-rear direction L can be suppressed. Therefore, even when repeated lifting and lowering operations of the legs are performed, displacement of the entire absorbent core is suppressed, and the absorbent core is deformed based on the deformation base point portion according to the movement of the legs to cover the body. Easy to continue.
  • a waist rigidity region having higher rigidity than a region extending from the first virtual line VL1 to the rear side may be provided in front of the first virtual line VL1.
  • the region extending rearward from the first virtual line VL1 is a region adjacent to the first virtual line VL1 and extending rearward from the first virtual line VL1.
  • the waist rigidity region is a region in which the target portion 95 is arranged, and the rigidity of the waist rigidity region is greater than the rigidity of the region from the first virtual line VL1 to the front end edge of the first deformation base point portion 81. Is also high.
  • the waist rigid region may be a region where materials such as the target portion 95 are arranged, or a region where the embossed portion of the absorbent core 31 is provided. The waist rigid region suppresses deformation of the waistline holding region, the waistline holding region can continuously cover the waist of the wearer, and the abdominal bulge can be continuously covered.
  • “Bending rigidity” in the present specification may be a value measured by Gurley stiffness.
  • Gurley stiffness can be measured using a No. 311 Gurley type flexibility tester manufactured by Yasuda Seiki Seisakusho Co., Ltd. according to JIS-L1096.
  • the length of the sample in the Gurley stiffness measurement in the width direction W can be 30 mm, and the length in the front-rear direction L can be 25 mm.
  • FIG. 9 schematically shows an absorbent core according to a modified example.
  • the absorbent core 31A according to Modification 1 includes a pair of deformation base point portions 80A and a high-rigidity portion 87 provided between the pair of deformation base point portions 80A.
  • the high-rigidity portion 87 is a region having higher bending rigidity than the surrounding region.
  • the high-rigidity portion 87 may be a portion having a higher basis weight than the surrounding area, or may be a portion in which the absorbent core 31 is compressed in the thickness direction.
  • the deformation base point portion 80A and the high-rigidity portion 87 according to Modification Example 1 are configured by an embossed portion obtained by compressing the absorbent core 31.
  • the high-rigidity portion 87 may be separated from the outer edge of the absorbent core, and may be provided only inside the deformation base point portion 80A in the width direction.
  • the rigidity of the high-rigidity portion 87 is higher than the rigidity of the region outside the deformation base point portion 80A in the width direction W. Since the high-rigidity portion 87 is provided between the deformation base point portions 80A, a rigidity difference occurs between an area outside the deformation base point portion 80A in the width direction W and an area inside the deformation base point portion 80A, and the deformation base point The absorbent core is more likely to be deformed with the portion 80A as the base point. Further, the high-rigidity portion makes it difficult for the deformation base point portion 80A to deform, and it is easy to maintain the deformation with the deformation base point portion 80A as the base point. In addition, it becomes difficult for the region between the deformation base point portions 80A to have a width, and the length in the width direction W of the region between the pair of deformation base point portions 80A can be secured and leakage can be suppressed.
  • the high rigidity portion 87 may be separated from the deformation base point portion 80A in the width direction W, or may be adjacent to the deformation base point portion 80A in the width direction W.
  • the region outside the deformation base point portion 80A in the width direction W is more likely to be deformed than the region between the deformation base point portions 80A, and the difference in rigidity is This makes the absorbent core easier to deform.
  • the high rigidity portion and the deformation starting point portion 80A may be integrated.
  • the deformation base point portion 80A includes a region extending from the base edge 80G to the thickness of the absorbent core 31 inward in the direction perpendicular to the line along the base edge. I'm out.
  • FIG. 9B is a plan view of the absorbent core 31B according to the second modification.
  • the modification base point portions 80B according to Modification Example 2 are continuous in the width direction W. That is, the inner edges of the respective deformation base point portions 80B forming the pair of deformation base point portions 80B communicate with each other. According to this configuration, when the legs are pressed from both sides in the width direction W, the pair of deformation base points 80B interfere with each other, and it is easy to maintain the deformation based on the deformation base points 80B. In addition, it becomes difficult for the region between the deformation base point portions 80B to have a width, and the length in the width direction W of the region between the pair of deformation base point portions 80B can be secured, and leakage can be suppressed.
  • the first deformation base point portion 81 is continuous in the width direction W, and the second deformation base point portion 82. Is preferably not continuous in the width direction W.
  • the second deformation base point portion 82 is located on the crotch side, and a relatively inward force in the width direction W is applied when the legs are closed. Therefore, if the second deformation base point portions 82 are connected to each other, the deformation base point of the second deformation base point portion 82 may be stretched against the movement of the leg inward in the width direction W, which may cause discomfort. Since the second deformation base point portions 82 are separated from each other in the width direction W, the region between the second deformation base point portions 82 is flexibly deformed, thereby not hindering the movement of the leg when the leg is closed, It is possible to suppress discomfort.
  • a disposable diaper capable of appropriately covering the wearer's body by deforming the absorbent core along the buttocks and crotch of the body.

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  • 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)
PCT/JP2019/041604 2018-10-25 2019-10-24 使い捨ておむつ WO2020085408A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012030093A (ja) * 2011-09-30 2012-02-16 Daio Paper Corp 吸収性物品
JP2014069002A (ja) * 2012-10-01 2014-04-21 Uni Charm Corp 吸収性物品
JP2016123636A (ja) * 2014-12-26 2016-07-11 ユニ・チャーム株式会社 使い捨ておむつ
JP2018161266A (ja) * 2017-03-24 2018-10-18 大王製紙株式会社 パンツタイプ使い捨ておむつ

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Publication number Priority date Publication date Assignee Title
JP2017213425A (ja) * 2017-08-14 2017-12-07 ユニ・チャーム株式会社 使い捨ておむつ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012030093A (ja) * 2011-09-30 2012-02-16 Daio Paper Corp 吸収性物品
JP2014069002A (ja) * 2012-10-01 2014-04-21 Uni Charm Corp 吸収性物品
JP2016123636A (ja) * 2014-12-26 2016-07-11 ユニ・チャーム株式会社 使い捨ておむつ
JP2018161266A (ja) * 2017-03-24 2018-10-18 大王製紙株式会社 パンツタイプ使い捨ておむつ

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