[go: up one dir, main page]

WO2025183040A1 - Article absorbant - Google Patents

Article absorbant

Info

Publication number
WO2025183040A1
WO2025183040A1 PCT/JP2025/006768 JP2025006768W WO2025183040A1 WO 2025183040 A1 WO2025183040 A1 WO 2025183040A1 JP 2025006768 W JP2025006768 W JP 2025006768W WO 2025183040 A1 WO2025183040 A1 WO 2025183040A1
Authority
WO
WIPO (PCT)
Prior art keywords
basis weight
region
low basis
width direction
absorbent core
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.)
Pending
Application number
PCT/JP2025/006768
Other languages
English (en)
Japanese (ja)
Inventor
嘉幸 松田
伸亨 加藤
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.)
Unicharm Corp
Original Assignee
Unicharm 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
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of WO2025183040A1 publication Critical patent/WO2025183040A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • 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
    • 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

Definitions

  • the present invention relates to an absorbent article having an absorbent core with a low basis weight portion in which the basis weight of the absorbent material is lower than that of the surrounding area.
  • Patent Document 1 discloses an absorbent article having an absorbent core with a low-basis weight section in which the basis weight of the absorbent material is lower than that of the surrounding area.
  • the low-basis weight section has a pair of crotch low-basis weight sections extending in the front-to-rear direction in the crotch region and spaced apart in the width direction, and a wide low-basis weight section behind the crotch low-basis weight sections that extends outward in the width direction.
  • the absorbent core When worn, the absorbent core is pressed by the legs and receives a force from the inside in the width direction, which causes it to easily deform with the low basis weight section as the base point. More specifically, the absorbent core has a base at the area sandwiched between a pair of low basis weight crotch sections, with the area outside the low basis weight crotch sections in the width direction rising up, forming a recessed shape with walls rising up on the left and right when viewed from the front. Body waste can be temporarily stored in the pocket created by this recessed shape.
  • JP 2011-152209 A Japanese Patent Application Laid-Open No. 2019-93194
  • the above-mentioned absorbent articles have the following problems.
  • the region from the crotch to the lower buttocks is the region that requires the most absorption capacity and is also the region where leakage is likely to occur.
  • deformation of the absorbent core into a concave shape can create a space to accommodate body waste, it can also result in an insufficient width of the absorbent core, which can lead to side leakage.
  • the present invention was made in consideration of these problems, and aims to provide a pants-type absorbent article that has a space in the crotch area to accommodate body waste, thereby preventing side leakage even when the pants are not pulled up sufficiently.
  • An absorbent article comprises a front-to-back direction, a width direction, and a thickness direction that are perpendicular to one another, a crotch region including the center in the front-to-back direction, a front waist region located forward of the crotch region, a rear waist region located rear of the crotch region, and an absorbent core located in at least the crotch region and containing absorbent material.
  • the absorbent article is a pants-type absorbent article in which the outer portions of the front waist region and the outer portions of the rear waist region are joined at a pair of side joints.
  • the absorbent core has a low-basis weight section having a lower basis weight of absorbent material than the surrounding area.
  • the low-basis weight section comprises a pair of crotch low-basis weight sections extending in the front-to-back direction in the crotch region and spaced apart in the width direction, and a pair of wide low-basis weight sections located rearward of the crotch low-basis weight sections and extending outward in the width direction toward the rear.
  • the rear end edges of the wide low-basis weight sections are located forward of the side joints.
  • the absorbent core has a first region sandwiched between the pair of low crotch weight sections, and a pair of second regions extending outward in the width direction from the low crotch weight sections to the outer edges of the absorbent core.
  • the widthwise length of the second region is longer than the widthwise length of the first region.
  • FIG. 1 is a front view of an absorbent article according to an embodiment.
  • FIG. 2 is a plan view of the absorbent article according to the embodiment in an unfolded state.
  • FIG. 3 is a cross-sectional view taken along line AA shown in FIG.
  • FIG. 4 is a plan view of the absorbent core.
  • FIG. 5 is a cross-sectional view of the absorbent core in a stretched state.
  • FIG. 6 is a cross-sectional view of the absorbent core when worn.
  • FIG. 7 is a plan view of an absorbent core according to a modified example.
  • a first aspect of the present invention provides an absorbent article comprising a crotch region having a center in the front-to-back direction, a width direction, and a thickness direction, the crotch region including the center in the front-to-back direction, a front waist region located forward of the crotch region, and a rear waist region located rear of the crotch region, and an absorbent core located at least in the crotch region and containing an absorbent material.
  • the absorbent article is a pants-type absorbent article in which the outer portions of the front waist region and the outer portions of the rear waist region are joined at a pair of side seams.
  • the absorbent core has a low-basis weight section having a basis weight of absorbent material lower than that of the surrounding area.
  • the low-basis weight section includes a pair of crotch low-basis weight sections extending in the front-to-back direction in the crotch region and spaced apart in the width direction, and a pair of wide low-basis weight sections located rearward of the crotch low-basis weight sections and extending outward in the width direction toward the rear.
  • the rear end edges of the wide low-basis weight sections are located forward of the side seams.
  • the absorbent core has a first region sandwiched between the pair of crotch low-basis-weight sections and a pair of second regions extending outward in the width direction from the crotch low-basis-weight sections to the outer edges of the absorbent core.
  • the widthwise length of the second region is longer than the widthwise length of the first region.
  • the region sandwiched between the pair of crotch low-basis-weight sections serves as the base, and the region outside the crotch low-basis-weight sections in the width direction rises, easily deforming into a recessed shape with walls rising on the left and right in a front view. Therefore, excrement can be temporarily stored in the pockets formed by the recessed shape. Furthermore, because the widthwise length of the second region extending outward from the crotch low-basis-weight sections is long, the height of the walls rising on the left and right can be ensured. Therefore, even if the pants-type absorbent article is not pulled up sufficiently when worn, the wall portion of the second region covers the sides of the pocket, preventing side leakage of excrement from the pocket storage space.
  • a wide low-basis weight portion is disposed behind the crotch low-basis weight portion.
  • the widthwise length of the bottom of the recessed shape increases toward the rear. Therefore, even when a large amount of excrement, such as feces, is excreted, space for storing excrement can be secured.
  • the region extending widthwise from the side joint is a region that fits closely around the wearer's waist.
  • the wide low-basis weight portion is spaced from the side joint in the front-to-rear direction. Therefore, even when the absorbent article fits closely around the waist, the pocket storage space is prevented from collapsing, and space for storing excrement can be maintained.
  • the invention according to Aspect 2 may have the following features in the invention according to Aspect 1.
  • the absorbent core has a non-low basis weight region in which the low basis weight portion is not formed across the entire width.
  • the non-low basis weight region is located in a region extending rearward from the rear edge of the wide low basis weight portion.
  • a non-low basis weight region is provided in a region extending rearward from the rear edge of the wide low basis weight portion, deformation of the recessed shape caused by the wide low basis weight portion is separated by the non-low basis weight region, and the deformation of the recessed shape can be prevented from propagating to the rear edge of the absorbent core.
  • the non-low basis weight region maintains the rigidity of the absorbent core in the width direction, ensuring the length of the absorbent core in the width direction.
  • the absorbent core can be kept in contact with the body over a wide area, ensuring absorption capacity.
  • the invention according to aspect 3 may have the following features in the invention according to aspect 2.
  • the rear continuous elastic member is arranged continuously from one end to the other in the width direction in the rear waistband region and stretches in the width direction. At least a portion of the rear continuous elastic member overlaps the non-low basis weight region arranged in a region extending rearward from the rear end edge of the wide low basis weight portion.
  • by pressing the non-low basis weight region with the continuous elastic member it is easier to achieve the effect of breaking up deformation of the recess shape with the wide low basis weight portion.
  • by improving the fit of the absorbent core with the rear continuous elastic member it is possible to prevent the absorbent core from slipping down and keep the pocket positioned facing the body.
  • the invention relating to aspect 4 may have the following features in the invention relating to any one of aspects 1 to 3.
  • the absorbent core has a waisted region in the region between the front and rear ends of the absorbent core, where the widthwise length of the absorbent core is shortened.
  • the waisted region has a widened region where the widthwise length of the absorbent core increases outward in the front-to-rear direction.
  • the crotch low-basis weight portion is located in the waisted region. At least a portion of the wide low-basis weight portion is located in the widened region.
  • the waisted region of the absorbent core is pinched by the legs when worn, and is prone to receiving a force directed inward in the widthwise direction.
  • This force deforms the crotch low-basis weight portion, allowing a recessed pocket to be formed in the crotch region.
  • At least a portion of the wide low-basis weight portion is located in the widened region. In the widened region, the width of the absorbent core increases toward the rear, making it easy to ensure the height of the pocket walls even if the width of the bottom of the recessed shape that is deformed from the wide, low-basis-weight section increases toward the rear.
  • the invention according to aspect 5 may have the following features in the inventions according to aspects 1 to 4:
  • the crotch low basis weight portion and the wide low basis weight portion are continuous.
  • the crotch low basis weight portion and the wide low basis weight portion work together to function as deformation base points for the absorbent core, making it easier to maintain the shape of the pocket.
  • the pocket formed by the crotch low basis weight portion and the pocket formed by the wide low basis weight portion are combined, ensuring a large storage space for the pocket.
  • the invention according to aspect 6 may have the following features in the invention according to aspect 5.
  • the absorbent core has a waisted region between the front and rear ends of the absorbent core, where the width of the absorbent core is shortened.
  • the waisted region has a widened region where the width of the absorbent core increases outward in the front-to-rear direction.
  • the boundary between the low crotch portion and the low wide portion is located in the widened region.
  • the storage space of the pocket increases from the boundary between the low crotch portion and the low wide portion towards the rear.
  • the invention according to Aspect 7 may be the invention according to any one of Aspects 1 to 6, and may have the following features:
  • a rear continuous elastic member is disposed continuously from one end to the other in the width direction in the rear waistband region and stretches in the width direction.
  • the rear edge of the wide low basis weight portion is located forward of the inner continuous elastic member, which is located most forward among the rear continuous elastic members.
  • the invention according to aspect 8 may have the following characteristics in the invention according to aspect 7:
  • the distance in the front-to-rear direction between the rear edge of the wide low basis weight section and the inner continuous elastic member is equal to or greater than the thickness of the absorbent core in the region between the rear edge of the wide low basis weight section and the inner continuous elastic member.
  • the invention according to aspect 9 may be the invention according to any one of aspects 1 to 8, and have the following features:
  • the low basis weight section has a rear low basis weight section that is located rearward of the wide low basis weight section.
  • the rear low basis weight section is located rearward of the non-low basis weight region that is located in an area extending rearward from the rear edge of the wide low basis weight section.
  • the non-low basis weight region has the effect of breaking up the recess shape and ensuring the width direction length of the absorbent core, while providing a deformation that extends in the front-to-rear direction to the absorbent core rearward of the non-low basis weight region, thereby improving the fit around the waist at the rear end of the absorbent core.
  • the invention according to aspect 10 may have the following features in the invention according to aspect 9.
  • the rear continuous elastic member is arranged continuously from one end to the other in the width direction in the rear waistband region and stretches in the width direction. At least a portion of the rear continuous elastic member is arranged overlapping at least a portion of the rear low basis weight portion.
  • the rear continuous elastic member improves the fit of the absorbent core, thereby preventing the absorbent core from slipping down and allowing the pocket to continue to be positioned facing the body.
  • the rear continuous elastic member allows the rear end of the absorbent core to fit better around the waist.
  • the invention according to aspect 11 may have the following features in the invention according to aspect 9 or aspect 10.
  • the rear low basis weight sections are arranged in a plurality along the front-to-rear direction and spaced apart in the width direction.
  • the front edge of a first rear low basis weight section which is located closest to the center of the absorbent core in the width direction, is located rearward of the front edge of a second rear low basis weight section, which is located further outward in the width direction than the first rear low basis weight section, among the rear low weight sections.
  • the absorbent core at the side of the absorbent core in the width direction is more likely to deform at a base point along the front-to-rear direction.
  • the widthwise sides of the rear end of the absorbent core tend to come into contact with the curve of the buttocks.
  • the invention according to Aspect 12 may have the following features in the invention according to any one of Aspects 1 to 11.
  • the absorbent article is folded in two with the skin-facing surfaces of the absorbent article facing each other, with a fold extending in the width direction at the center of the front-to-rear direction of the absorbent article as the base point.
  • the crotch low-basis weight portion straddles the fold.
  • the center of the front-to-rear direction of the absorbent article is prone to deform convexly toward the non-skin side due to the crease caused by the fold.
  • deformation into a concave shape with the crotch low-basis weight portion as the deformation base point makes it easy to form a storage space that expands in the width direction and the front-to-rear direction.
  • FIG. 1 is a front view of an absorbent article 10 according to an embodiment
  • FIG. 2 is a plan view of the absorbent article 10 in an unfolded state.
  • the plan view shown in FIG. 1 is a view of the absorbent article in a stretched state, as seen from the skin side.
  • the stretched state in this invention refers to a state in which the absorbent article 10 has been stretched to a state in which no wrinkles are formed, with the side joints 60 (described below) unfolded.
  • the natural state refers to a state in which, in the case of an absorbent article housed in a package, the absorbent article is removed from the package and left in an atmosphere of 20°C ⁇ 2°C and a relative humidity of 60% ⁇ 5% RH for 24 hours.
  • FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2.
  • the absorbent article 10 may be any pants-type absorbent article, such as a disposable diaper.
  • the absorbent article 10 has a front-to-rear direction L, a width direction W, and a thickness direction T, which are perpendicular to one another.
  • the front-to-rear direction L is defined by the direction extending to the front and back of the body. In other words, the front-to-rear direction L is the direction extending from front to back in the unfolded absorbent article 10.
  • the absorbent article 10 also has a thickness direction T, which is perpendicular to both the front-to-rear direction L and the width direction W.
  • the thickness direction T extends between a skin side T1 facing the wearer and a non-skin side T2 facing away from the wearer.
  • the absorbent article 10 has a crotch region S3, a front waist region S1 located in front of the crotch region S3, and a rear waist region S2 located behind the crotch region S3.
  • the front waist region S1 and rear waist region S2 form a waist region that covers the wearer's waist.
  • the front waist region S1 is a region that is placed against the wearer's stomach.
  • the rear waist region S2 is a region that is placed against the wearer's back.
  • the crotch region S3 is a region that is located under the wearer's crotch, and is located between the front waist region S1 and the rear waist region S2.
  • the absorbent article 10 has a pair of side joints 60 that join the outer sides of the front waist region S1 and the rear waist region S2.
  • the absorbent article 10 is folded in two around a fold FL located in the center of the absorbent article 10 in the front-to-rear direction L, and is joined in this folded state by the side joints 60 to form a pants-like shape.
  • the fold FL extends in the width direction W, and is a fold that folds the absorbent article 10 in two so that the skin-side surfaces T1 of the absorbent article 10 face each other.
  • the side joints 60 are defined by the parts that engage the outer sides of the front waist region S1 and the rear waist region S2, and may extend along the front-to-rear direction L in each of the front waist region S1 and the rear waist region S2.
  • the outer portion in this invention refers to a portion occupying a certain range in the width direction W including an edge in the width direction W, and the outer edge refers to an edge in the width direction W. Furthermore, the outer edge in this invention refers to an edge located on the outside in the front-to-back direction L, and the inner edge refers to an edge located on the inside in the front-to-back direction L.
  • Figure 1 shows the state in which the side joints 60 are joined
  • Figure 2 shows the state in which the side joints 60 are released and the absorbent article 10 is unfolded.
  • the absorbent article 10 is formed with a waist opening 62 through which the wearer's waist is passed, and a pair of leg openings 66 through which the wearer's legs are respectively inserted.
  • the waist opening 62 is defined by the front edge of the front waist region S1 and the rear edge of the rear waist region S2.
  • the boundary between the front waist region S1 and the crotch region S3 may be defined by the rear edge of the side joint 60 provided in the front waist region S1, and the boundary between the rear waist region S2 and the crotch region S3 may be defined by the front edge of the side joint 60 provided in the rear waist region S2.
  • the absorbent article 10 has an absorbent core 50 disposed in at least the crotch region S3 and containing an absorbent material.
  • the absorbent core 50 may contain, for example, pulp or superabsorbent polymer (SAP), or a mixture thereof.
  • SAP superabsorbent polymer
  • the absorbent core 50 is disposed in at least the crotch region S3.
  • the absorbent core 50 may extend from the front waist region S1 to the rear waist region S2 in the front-to-rear direction L.
  • the absorbent core 50 may be covered by a core wrap (not shown).
  • the absorbent core 50 may have a waist region 55 in the region between the front and rear ends of the absorbent core 50, where the length of the absorbent core 50 in the width direction W is shortened.
  • the waist region 55 is located between the front maximum width portion 50FM, which is the longest widthwise portion of the absorbent core at the front end of the absorbent core 50, and the rear maximum width portion 50RM, which is the longest widthwise portion of the absorbent core 50 at the rear end of the absorbent core 50.
  • the constricted region 55 may have a minimum width portion 55N, which has the shortest widthwise length of the absorbent core 50, and a widening region 56, which is located outside the minimum width portion 55N in the front-to-rear direction L and whose length in the widthwise direction W of the absorbent core 50 increases toward the outside in the front-to-rear direction L.
  • the absorbent article 10 may have an absorbent body 40.
  • the absorbent body 40 may have an absorbent core 50, a liquid-permeable top sheet 41 covering the skin side T1 of the absorbent core 50, a liquid-impermeable back sheet 42 covering the non-skin side T2 of the absorbent core 50, and a non-skin side sheet 43 covering the non-skin side T2 of the back sheet 42.
  • the absorbent body 40 may be arranged in at least the crotch region S3, and may extend into the front waist region S1 and the rear waist region S2.
  • the top sheet 41 and the non-skin side sheet 43 may be made of nonwoven fabric.
  • the back sheet 42 may be made of film.
  • the absorbent body 40 may be constructed as a separate body from the waist sheet arranged in the waist region.
  • the absorbent body 40 may have leak-proof gathers 45 that can stand up on the skin side T1.
  • the leak-proof gathers 45 are arranged on both sides of the center of the absorbent body 40 in the width direction W, and stand up closer to the skin side T1 than the top sheet 41.
  • the leak-proof gathers 45 can prevent side leakage of body waste.
  • the leak-proof gathers 45 may be composed of a portion where the outer part of the non-skin side sheet 43 is folded back closer to the skin side T1 than the top sheet 41, and a leak-proof elastic member 46 joined to the folded back portion.
  • the leak-proof elastic member 46 is joined to the non-skin side sheet 43 in a state where it can stretch in the front-to-back direction L, and has a contraction region R46 that can contract in the front-to-back direction.
  • a plurality of waistline sheets are arranged in the front waistline region S1 and the rear waistline region S2.
  • the waistline sheets are the sheets arranged in the waistline region other than the absorbent body 40.
  • the waistline sheets may include a first waistline sheet 35 and a second waistline sheet 36 arranged on the non-skin side T2 of the first waistline sheet 35.
  • the first waistline sheet 35 and the second waistline sheet 36 may be made of nonwoven fabric.
  • the second waistline sheet 36 may include a non-folded portion 361 located on the non-skin side T2 of the first waistline sheet 35, and a folded portion 362 folded to the skin side T1 from the waistline opening 62 (the front edge of the front waistline region S1 and the rear edge of the rear waistline region S2).
  • the folded portion 362 of the second waistline sheet 36 may be arranged on the skin side T1 of the first waistline sheet 35 and the absorbent body 40.
  • the waist region may be provided with waist elastic members that stretch in the width direction W.
  • the waist elastic members may be made of rubber thread that stretches in the width direction W, or an elastic sheet that stretches in the width direction W.
  • the waist elastic members are made of rubber thread, and multiple waist elastic members may be arranged in each of the front waist region S1 and the rear waist region S2, spaced apart in the front-to-back direction L.
  • the waist elastic members only need to be arranged in at least the waist region, and may be arranged across the waist region and the crotch region.
  • the waist elastic members are arranged across the rear waist region S2 and the crotch region S3, and include leg elastic members 38 arranged along the leg openings 66.
  • the leg elastic members 38 curve from the outer widthwise portion of the rear waist region S2 toward the inside in the width direction W, and then toward the inside in the front-to-back direction (toward the crotch region). Three leg elastic members 38 are provided in the rear waist region S2.
  • the waist elastic members may include a front continuous elastic member 31 that is continuously arranged from one end to the other in the width direction of the front waist region S1 and stretches in the width direction, and a rear continuous elastic member 32 that is continuously arranged from one end to the other in the width direction W of the rear waist region S2 and stretches in the width direction.
  • all of the waist elastic members are continuous elastic members.
  • the inner continuous elastic member 321, which is located furthest forward among the rear continuous elastic members, is an elastic member that constitutes the leg elastic members 38.
  • Fig. 4 is a plan view of the absorbent core 50
  • Figs. 5 and 6 are cross-sectional views of the absorbent core shown in Fig. 4.
  • Fig. 5 is a cross-sectional view of the absorbent core 50 in an extended state
  • Fig. 6 is a cross-sectional view of the absorbent core 50 when worn, taken along the line shown in Fig. 4.
  • Figs. 5(A) and 6(A) are cross-sectional views taken along line B-B in Fig. 4
  • Figs. 5(B) and 6(B) are cross-sectional views taken along line C-C
  • Figs. 5(C) and 6(C) are cross-sectional views taken along line D-D.
  • the absorbent core 50 has a low-basis weight section in which the basis weight of the absorbent material is lower than that of the surrounding area.
  • the low-basis weight section is a section in which the basis weight of the absorbent material is lower than that of the surrounding area (for example, the area adjacent in the width direction W or the area adjacent in the front-to-rear direction L).
  • the low-basis weight section may contain absorbent material, or it may not contain absorbent material (so-called slits).
  • the low-basis weight section is formed by slits and is formed across the entire thickness direction T of the absorbent core 50.
  • a low-basis weight section formed by slits is more likely to function as a deformation base point for the absorbent core 50.
  • a low-basis weight section in which absorbent material is disposed is less likely to lose its shape when absorbing body fluids, making it easier to maintain the deformed state of the absorbent core even during long-term use. Furthermore, a low-basis weight section in which absorbent material is disposed can also diffuse body fluids using the absorbent material disposed in the low-basis weight section, improving liquid diffusion without disrupting the diffusion of body fluids.
  • the width of the low basis weight section (the length in the direction perpendicular to the extension direction of the low basis weight section) is not limited, but may be, for example, 3 mm or more, and preferably 5 mm or more.
  • the width of the low basis weight section may be 7 mm or less, and preferably 5.5 mm or less.
  • the width of the low basis weight section may be equivalent to the thickness of the absorbent core 50. "Equal to the thickness of the absorbent core 50" means a width within a range of ⁇ 5% of the thickness of the absorbent core 50.
  • the low basis weight portions include a pair of crotch low basis weight portions 51 extending in the front-to-back direction L in the crotch region S3 and spaced apart in the width direction W, and a pair of wide low basis weight portions 52 located rearward of the crotch low basis weight portions 51 and extending outward in the width direction W toward the rear.
  • the pair of crotch low basis weight portions 51 need only be spaced apart in the width direction W, and may be positioned on either side of the center of the absorbent core 50 in the width direction W.
  • the crotch low basis weight portions 51 need only be located in at least the crotch region S3, and may also span the front waist region S1.
  • the crotch low basis weight portions 51 are located only in the crotch region S3.
  • the pair of wide low basis weight sections 52 extend outward in the width direction toward the rear, behind the crotch low basis weight section 51. If the length of the width direction W of the wide low basis weight sections 52 is constant, both the inner and outer edges of the wide low basis weight sections 52 may extend outward in the width direction W toward the rear. However, if the length of the width direction W of the wide low basis weight sections 52 is not constant, it is sufficient that the inner edges of the wide low basis weight sections 52 extend outward in the width direction toward the rear. In other words, it is sufficient that the length in the width direction W of the third region R3 sandwiched between the inner edges of the wide low basis weight sections 52 increases toward the rear.
  • the pair of wide low basis weight sections 52 may have portions located rearward of the crotch low basis weight sections 51. Preferably, the entire pair of wide low basis weight sections 52 may be located rearward of the crotch low basis weight sections 51.
  • the rear edge of the wide low basis weight portion 52 is located forward of the side joint portion 60.
  • the wide low basis weight portion 52 terminates within the crotch region S3 and does not extend across the rear waistline region S2.
  • the rear edge of the wide low basis weight portion 52 is located in the region that is central in the front-to-back direction L when the crotch region S3 is divided into thirds in the front-to-back direction L, and is located forward of the front edges of the waistline sheets 35, 36 that extend from the rear waistline region toward the crotch region.
  • the absorbent core 50 has a first region R1 sandwiched between a pair of low crotch basis weight sections 51, and a pair of second regions R2 extending outward in the width direction W from the low crotch basis weight sections 51 to the outer edges of the absorbent core 50.
  • the first region R1 is a region sandwiched between the inner edges of the low crotch basis weight sections 51.
  • the inner edges of the low crotch basis weight sections 51 are linear along the front-to-back direction L
  • the first region R1 is rectangular
  • the length of the first region R1 in the width direction W is constant.
  • the second region R2 is a region extending between the outer edges of the low crotch basis weight sections 51 and the outer edges of the absorbent core 50.
  • the outer edges of the low crotch basis weight sections 51 are linear along the front-to-back direction L, and the outer edges of the absorbent core 50 are curved.
  • the length of the second region R2 in the width direction W varies.
  • the length in the width direction W of the second region R2 is longer than the length in the width direction W of the first region R1.
  • the length in the width direction W of the first region R1 and the length of the second region R2 on an imaginary line along the width direction W should be compared, and the length in the width direction W of the second region R2 should be greater than the length in the width direction W of the first region R1.
  • the length in the width direction W of the second region R2 should be greater than the length in the width direction W of the first region R1.
  • the absorbent core 50 of the absorbent article 10 When worn, the absorbent core 50 of the absorbent article 10 is sandwiched between the legs and is prone to deformation, with the pair of low-basis-weight crotch sections 51 serving as base points. Furthermore, in absorbent articles with leak-preventing gathers 45, the outer portions of the absorbent core are pulled up toward the skin by the leak-preventing gathers 45. As a result, as shown in Figure 6 (A), the first region R1 sandwiched between the pair of low-basis-weight crotch sections 51 serves as the base, and the second region R2, located outside the low-basis-weight crotch sections 51 in the width direction W, rises up. This creates a recessed shape with walls rising up on the left and right sides when viewed from the front.
  • the absorbent core when the outer portions of the absorbent core are pulled up by the leak-preventing gathers 45 and the absorbent core is sandwiched between the legs, the absorbent core is prone to deformation into a recessed shape. Body waste can be temporarily stored in the pockets created by the recessed shape.
  • the widthwise length of the first region R1 is less than the widthwise length of the second region R2, and the length of the second region R2 in the width direction W is long, ensuring the height of the rising walls on the left and right. Therefore, even if the pants-type absorbent article 10 is not pulled up sufficiently when worn, the wall portion of the second region R2 can prevent side leakage of body exudates from the storage space of the pocket.
  • a wide low-basis weight section 52 is located behind the crotch low-basis weight section 51.
  • deformation caused by the crotch low-basis weight section 51 propagates to the wide low-basis weight section 52, causing the third region R3 sandwiched between the pair of wide low-basis weight sections 52 to form a bottom, with the fourth region R4 located outside the wide low-basis weight section 52 in the width direction W rising up, forming a recessed shape with walls rising up on the left and right in a front view.
  • the length in the width direction W of the third region R3 increases toward the rear.
  • the wide low-basis weight section 52 is spaced apart from the side joint in the front-to-rear direction.
  • the area extending widthwise from the side joint is an area that fits snugly around the wearer's waist, but the pocket storage space is separated from this area, preventing the storage space from collapsing and ensuring that there is still space available to store body waste.
  • the length in the width direction W of the first region R1 may be at least 20 mm, and preferably 30 mm or more.
  • the length in the width direction W of the second region R2 may be 21 mm, and preferably 31 mm or more.
  • the length in the width direction W of the first region R1 may be 40 mm or less.
  • the length in the width direction W of the second region R2 may be 50 mm or less.
  • the ratio of the width direction length of the second region R2 to the width direction W of the first region R1 may be 1.1 or more, and preferably 1.2 or more.
  • the ratio of the width direction length of the second region R2 to the width direction W of the first region R1 may be 1.5 or less.
  • the crotch low basis weight portion 51 only needs to extend in at least the front-to-rear direction L, and may be linear along the front-to-rear direction L, or may have a wavy or other portion that is inclined relative to the front-to-rear direction L, but may have a shape that extends in the front-to-rear direction as a whole.
  • the shape extending in the front-to-rear direction need not be parallel to the front-to-rear direction L, but may also be slightly inclined (for example, at an angle of less than 10 degrees, preferably less than 5 degrees) relative to the front-to-rear direction.
  • the length in the width direction W of the third region R3 increases toward the rear.
  • the length in the width direction W at the front edge of the third region R3 may be the same as or longer than the maximum width of the first region R1.
  • the length in the width direction W at the rear edge of the third region R3 may be longer than the maximum width of the first region R1.
  • the length in the width direction W at the rear edge of the third region R3 may be at least 30 mm or more, and preferably 40 mm or more.
  • the angle of the wide low basis weight portion 52 with respect to the front-to-rear direction L may be 5 degrees or more and 45 degrees or less, and preferably 20 degrees or more and 30 degrees or less.
  • the angle of the wide, low-basis-weight portions 52 relative to the front-to-rear direction L may be the angle formed by an imaginary line connecting the centers of the wide, low-basis-weight portions 52 in the width direction W when the width direction W of the wide, low-basis-weight portions 52 is constant; or, if the width direction W of the wide, low-basis-weight portions 52 is not constant, the angle may be the angle formed by an imaginary line along the inner edges of the pair of wide, low-basis-weight portions 52 in the front-to-rear direction L.
  • the absorbent core 50 has a fourth region R4 extending between the outer edges of the wide, low-basis-weight portions 52 and the outer edge of the absorbent core 50.
  • the width direction length of the fourth region R4 may be 21 mm, preferably 31 mm or more.
  • the width direction length of the fourth region R4 may be equal to the width direction length of the second region R2. "Equal to the width direction length of the second region R2" means within a range of ⁇ 5% of the width direction length of the second region R2.
  • the wide low basis weight section 52 may be connected to the crotch low basis weight section 51.
  • the crotch low basis weight section 51 and the wide low basis weight section 52 work together to function as a deformation base point for the absorbent core 50, making it easier to maintain the shape of the pocket.
  • the pocket formed by the crotch low basis weight section 51 and the pocket formed by the wide low basis weight section 52 combine to ensure a large storage space for the pocket.
  • the wide low basis weight section 52 may be separated from the crotch low basis weight section 51.
  • the absorbent core 50 may have a non-low basis weight region NR, which is a region behind the wide low basis weight section 52 where no low basis weight section is formed across the entire width of the absorbent core 50.
  • the non-low basis weight region NR is a region where no low basis weight section is provided continuously across the entire width of the absorbent core 50 in the width direction W.
  • the non-low basis weight regions NR are provided between the wide low basis weight section 52 and the rear low basis weight section 53 described below, between the rear low basis weight section 53 and the rear edge of the absorbent core 50, between the crotch low basis weight section 51 and the front low basis weight section 54 described below, and between the front low basis weight section 54 and the front edge of the absorbent core 50.
  • the non-low basis weight region NR between the wide low basis weight section 52 and the rear low basis weight section 53 is located in a region extending rearward from the rear edge of the wide low basis weight section 52.
  • the non-low basis weight region NR can separate the deformation of the recessed shape caused by the wide low basis weight section 52, preventing excrement contained in the recessed pocket from leaking out toward the back.
  • the non-low basis weight region NR between the crotch low basis weight section 51 and the front low basis weight section 54 is located in a region extending frontward from the front edge of the crotch low basis weight section 51.
  • the non-low basis weight region NR can separate the deformation of the recessed shape caused by the crotch low basis weight section 51, preventing excrement contained in the recessed pocket from leaking out toward the belly.
  • the non-low basis weight region NR maintains the rigidity of the absorbent core 50 in the width direction W, preventing the absorbent core from creeping in the width direction behind the center of the crotch region, keeping the absorbent core in contact with the body and ensuring absorption capacity. Furthermore, in absorbent articles with leak-proof gathers 45, preventing the absorbent core from creeping in the width direction prevents the left and right leak-proof gathers 45 from creeping inward in the width direction W, ensuring a distance between the left and right leak-proof gathers and further preventing side leakage.
  • At least a portion of the non-low basis weight region NR arranged in the region extending rearward from the rear edge of the wide low basis weight portion 52 may be arranged in the wide width region 56.
  • the non-low basis weight region NR separates deformation of the absorbent core 50 in the front-to-rear direction L, making it easier to ensure the length of the width direction W of the rear maximum width portion 50RM.
  • the non-low basis weight region NR arranged in the region extending rearward from the rear edge of the wide low basis weight portion 52 may be arranged in the rear maximum width portion 50RM.
  • At least a portion of the rear continuous elastic member 32 may overlap the non-low basis weight region NR located in the region extending rearward from the rear edge of the wide low basis weight portion 52.
  • the rear continuous elastic member 32 can further separate the deformation of the recessed shape caused by the wide low basis weight portion 52.
  • the rear continuous elastic member 32 also improves the fit of the absorbent core, preventing the absorbent core from slipping down and allowing the pocket to continue to be positioned facing the body. By improving the fit of the absorbent core 50 with the rear continuous elastic member 32, the length of the absorbent core 50 in the width direction W can be ensured.
  • three leg elastic members 38 overlap the non-low basis weight region NR located in the region extending rearward from the rear edge of the wide low basis weight portion 52.
  • the rear edge of the wide low basis weight portion 52 may be located forward of the inner continuous elastic member 321, which is the frontmost of the rear continuous elastic members 32. That is, the wide low basis weight portion 52 and the inner continuous elastic member 321 may be spaced apart in the front-to-rear direction L.
  • the inner continuous elastic member 321 more easily breaks up the deformation of the recessed shape caused by the wide low basis weight portion 52, and the inner continuous elastic member 321 fits snugly to the body, thereby preventing excrement contained in the recessed pocket from leaking out to the back.
  • the inner continuous elastic member 321 overlaps the absorbent core 50, as in this embodiment, the inner continuous elastic member 321 fits snugly to the body, thereby preventing the absorbent core 50 from slipping down.
  • the pocket's storage space is prevented from collapsing due to contraction of the inner continuous elastic member 321, and a large storage space can be maintained.
  • the distance in the front-to-rear direction L between the rear edge of the wide low basis weight portion 52 and the inner continuous elastic member 321 may be equal to or greater than the thickness of the absorbent core 50 in the region between the rear edge of the wide low basis weight portion 52 and the inner continuous elastic member 321.
  • the wide low basis weight portion 52 and the inner continuous elastic member 321 are spaced apart by a distance equal to or greater than the thickness of the absorbent core 50, which reduces interference between the deformation of the absorbent core's recessed shape and the deformation of the absorbent core in close contact with the body due to the inner continuous elastic member, making it easier to achieve each deformation.
  • the shortest distance may be equal to or greater than the thickness of the absorbent core 50.
  • the distance in the front-to-rear direction L between the rear edge of the wide low basis weight portion 52 and the inner continuous elastic member 321 may preferably be equal to or greater than twice the length in the thickness direction of the absorbent core 50.
  • the low crotch area 51 may be located in the waist region 55.
  • the waist region 55 of the absorbent core 50 is pinched by the legs when worn and is prone to receiving a force acting inward in the width direction W. This force causes the low crotch area 51 to deform, forming a recessed pocket in the crotch region S3.
  • the entire front-to-back direction L of the low crotch area 51 is located within the waist region 55, and is positioned across the shortest width portion 55N and the widened region 56. Because the low crotch area 51 along the front-to-back direction straddles the widened region 56, the length of the second region R2 in the width direction W increases toward the rear, allowing the height of the wall covering the pocket to gradually increase toward the rear.
  • At least a portion of the wide low basis weight portion 52 may be located in the widening region 56.
  • the widening region 56 has a length in the width direction W of the absorbent core 50 that increases toward the rear. Because the wide low basis weight portion 52 is located in the widening region 56, it is easy to ensure the height of the wall portion of the recessed shape even if the width direction length of the bottom of the recessed shape deformed from the wide low basis weight portion 52 increases toward the rear. In this embodiment, the entire area in the front-to-rear direction L of the wide low basis weight portion 52 is located within the widening region 56.
  • the boundary between the crotch low basis weight section 51 and the wide low basis weight section 52 may be located in the widened region 56.
  • the boundary between the crotch low basis weight section 51 and the wide low basis weight section 52 forms the rear edge of the crotch low basis weight section 51 and the front edge of the wide low basis weight section 52.
  • the storage space of the pocket expands towards the rear from the boundary between the crotch low basis weight section 51 and the wide low basis weight section 52.
  • the low basis weight section may have a rear low basis weight section 53 located rearward of the wide low basis weight section 52.
  • the rear low basis weight section 53 may be located rearward of a non-low basis weight region NR located in a region extending rearward from the rear edge of the wide low basis weight section 52.
  • the non-low basis weight region NR has the effect of breaking up the recessed shape and ensuring the length of the absorbent core 50 in the width direction W, while providing a deformation extending in the front-to-rear direction L in the absorbent core 50 rearward of the non-low basis weight region NR, improving the fit around the waist at the rear end of the absorbent core 50.
  • the rear end of the absorbent core 50 is likely to come into contact with the buttocks.
  • a plurality of rear low basis weight sections 53 may be arranged along the front-to-rear direction L and spaced apart in the width direction W. By providing multiple deformation base points for the rear low basis weight sections 53, the absorbent core 50 can be fitted to a rounded waist area.
  • the rear low basis weight sections 53 may have a first rear low basis weight section 531 that is located closest to the center of the absorbent core 50 in the width direction W, and a second rear low basis weight section 532 that is located further outward in the width direction W than the first rear low basis weight section 531.
  • the rear low basis weight sections have a third rear low basis weight section 533 that is located further outward in the width direction W than the second rear low basis weight section 532, and three of them are arranged on each side of the center of the absorbent core 50 in the width direction W.
  • the rear edge of the first rear low basis weight section 531, the rear edge of the second rear low basis weight section 532, and the rear edge of the third rear low basis weight section 533 are aligned in the front-to-back direction L.
  • the front edge of the first rear low basis weight section 531, the front edge of the second rear low basis weight section 532, and the front edge of the third rear low basis weight section 533 are offset in the front-to-back direction L. More specifically, the front edge of the first rear low basis weight section 531 may be positioned further rearward than the front edge of the second rear low basis weight section 532.
  • the front edge of the first rear low basis weight section 531 is positioned relatively rearward, deformation of the absorbent core 50 near the widthwise center of the absorbent core 50 is suppressed, making it easier for the absorbent core 50 to fit flatly against the body. This makes it easier to maintain the shape of the pocket near the widthwise center of the absorbent core, making it easier to continue to secure storage space for the pocket.
  • the front edge of the second rear low basis weight section 532 is located relatively far forward, the sides of the absorbent core 50 in the width direction W tend to deform easily at base points along the front-to-back direction L. The widthwise sides of the rear end of the absorbent core 50 tend to come into contact with the curve of the buttocks.
  • the absorbent core 50 tends to fit along the curve of the buttocks.
  • the front edge of the second rear low basis weight section 532 may be located further rear than the front edge of the third rear low basis weight section.
  • the third rear low basis weight section 533 may be located further outward in the width direction W than the outer edge of the wide low basis weight section 52.
  • the rear low basis weight section 53 may be located on an imaginary extension line EL52 extending rearward from the wide low basis weight section 52.
  • At least a portion of the rear continuous elastic member 32 may be positioned overlapping at least a portion of the rear low basis weight portion 53.
  • the rear continuous elastic member 32 improves the fit of the absorbent core 50, preventing the absorbent core 50 from slipping down and allowing the pocket to remain positioned facing the body. Furthermore, contraction of the rear continuous elastic member 32 allows the rear end of the absorbent core 50 to fit better around the waist.
  • the rear continuous elastic member 32 overlaps the rear end of the rear low basis weight portion 53, but does not overlap the center in the front-to-rear direction L or the front end of the rear low basis weight portion 53. This configuration ensures the fit of the rear end of the absorbent core 50, while making it easier for the absorbent core 50 to fit around a rounded waist at the center in the front-to-rear direction L and the front end of the rear low basis weight portion 53.
  • At least a portion of the front continuous elastic member 31 may overlap the non-low basis weight region NR located in the region extending forward from the front edge of the crotch low basis weight portion 51.
  • the front continuous elastic member 31 separates the deformation of the recessed shape caused by the crotch low basis weight portion 51 in the front-to-rear direction L, thereby suppressing front leakage.
  • the front continuous elastic member 31 also improves the fit of the absorbent core, suppressing the absorbent core 50 from slipping down, and allowing the pocket to continue to be positioned facing the body. By improving the fit of the absorbent core with the front continuous elastic member 31, it is possible to suppress widthwise insertion of the absorbent core and ensure the widthwise length of the absorbent core.
  • the low basis weight section may have a front low basis weight section 54 located forward of the crotch low basis weight section 51.
  • the front low basis weight section 54 may be located forward of a non-low basis weight region NR located in a region extending forward from the front edge of the crotch low basis weight section 51.
  • the non-low basis weight region NR has the effect of breaking up the recessed shape and suppressing the absorbent core 50 from creeping forward in the width direction, while the front low basis weight section 54 provides a deformation base point forward of the non-low basis weight region NR, improving the fit around the waist at the front end of the absorbent core 50.
  • Multiple front low basis weight sections 54 may be located at intervals in the width direction W.
  • the front low basis weight sections 54 provide a deformation base point, allowing the absorbent core to fit around a rounded abdominal area.
  • the front low basis weight section 541 located at the outermost width of the multiple front low basis weight sections 54 may extend outward in the width direction W toward the front. With this configuration, the absorbent core 50 deforms around the front low basis weight section 541, allowing the absorbent core 50 to fit the groin area.
  • a wall portion formed by the second region R2 and the fourth region R4 and a wall portion formed by the leakage prevention gathers 45 may be formed on the outside in the width direction W of the storage space formed by the crotch low basis weight portion 51 and the wide low basis weight portion 52.
  • the wall portions formed by the second region R2 and the fourth region R4 and the wall portions formed by the leakage prevention gathers 45 can further prevent lateral leakage of excrement.
  • the peaks of the rising leakage prevention gathers 45 may rise toward the outside in the width direction W. That is, the leakage prevention gathers 45 may have a so-called outward-leaning shape.
  • the leakage prevention gathers are inward-leaning, the spacing between the left and right leakage prevention gathers 45 will be close, and there is a risk that the leakage prevention gathers 45 will block the storage space formed by the concave shape.
  • the peaks of the rising leakage prevention gathers 45 facing outward in the width direction, the storage space formed by the concave shape will be prevented from being blocked by the leakage prevention gathers 45, making it easier to guide excrement into the storage space.
  • the absorbent core 50 is deformed using the crotch low basis weight portion 51 and the wide low basis weight portion 52 as base points, resulting in a concave shape in cross section along the width direction W. It is preferable that this concave shape also conforms to the body in cross section along the front-to-back direction L.
  • a concave shape that conforms to the body in cross section along the front-to-back direction L has a bottom at the center of the crotch region S3 in the front-to-back direction L and rises outward in the front-to-back direction L.
  • the rear edge of the contraction region R46 of the leakage preventing gathers 45 may be located behind the rear edge of the crotch low basis weight portion 51, and preferably behind the rear edge of the wide low basis weight portion 52.
  • the front edge of the contraction region R46 of the leakage preventing gathers 45 may also be located behind the front edge of the crotch low basis weight portion 51. Contraction of the leak-proof elastic member 46 allows the rear and front sides of the cup shape to be pulled up toward the body, creating a recessed shape in which the pocket conforms to the body even in a cross section along the front-to-back direction.
  • the crotch low basis weight portion 51 may straddle the fold line FL.
  • the fold line FL is a fold that folds the absorbent article 10 in two so that the skin-side T1 surfaces of the absorbent article 10 face each other. Therefore, the center of the absorbent article 10 in the front-to-back direction L is more likely to deform convexly toward the non-skin side T2 due to the crease caused by the fold line FL.
  • the absorbent core 50 deforms into a concave shape using the crotch low basis weight portion 51 as the deformation base point, making it easier to form a storage space that extends in the width direction W and the front-to-back direction L.
  • FIG. 7 is a plan view of an absorbent core 50X according to a modification example.
  • the absorbent core 50X according to the modification example is provided with compressed sections 80 that compress at least the absorbent core 50 in the thickness direction.
  • the absorbent core 50X has a lattice compressed region R80 in which lattice-shaped compressed sections 80 are arranged.
  • the compressed sections 80 may compress only the absorbent core 50, or may compress the core wrap together with the absorbent core 50.
  • the compressed sections 80 may be recessed from the skin side T1 of the absorbent core 50 toward the non-skin side T2, or from the non-skin side T2 of the absorbent core 50 toward the skin side T1.
  • the compressed region is an area in which compressed sections are arranged, and is a region of a certain range that includes compressed sections in a certain pattern.
  • the compression region may have a single compression unit (for example, a continuous linear compression unit) or a group of multiple compression units (for example, a group of linear compression units).
  • the lattice compression region R80 has compression units arranged in a lattice pattern.
  • the lattice compression region R80 may have a first lattice compression region R81 and a second lattice compression region R82 in which the area ratio of the compressed portions 80 is higher than that of the first lattice compression region R81.
  • the compressed portions of the second lattice compression region R82 have a shorter lattice pitch and are arranged more densely than the compressed portions of the first lattice compression region R81.
  • the area ratio of the compressed portions is the ratio of the area in which the compressed portions are arranged. When calculating the area ratio of the compressed portions, the area of the compressed region (the entire area surrounding the compressed portions) and the compressed portions (the area of only the compressed portions) are measured, and the ratio can be calculated as the area of the compressed portions / the area of the compressed region.
  • the first lattice compression region R81 is arranged on both sides of the center of the absorbent core in the front-to-back direction.
  • the widthwise range of the first lattice compression region R81 is the range sandwiched between the outer edges on both sides of the lattice-shaped compressed portions.
  • the second lattice compression region R82 is spaced apart in the width direction from the first lattice compression region R81 and is positioned widthwise outward of the first lattice compression region R81.
  • the widthwise range of the second lattice compression region R82 is the range sandwiched between the outer edges on both sides of the lattice-shaped compression section.
  • the first lattice compression region R81 may be arranged in the first region R1 and the third region R3.
  • the first region R1 and the third region R3 straddle the center of the width direction W of the absorbent core 50 and are regions that are likely to come into contact with the excretory opening.
  • the second lattice compression region R82 may be arranged in the second region R2 and the fourth region R4. This configuration ensures the rigidity of the absorbent core 50 in the second region R2 and the fourth region R4, makes it easier to maintain the shape of the pocket walls, and reduces side leakage.
  • the low basis weight portion in the embodiment includes a crotch low basis weight portion 51, a wide low basis weight portion 52, a rear low basis weight portion 53, and a front low basis weight portion 54.
  • the low basis weight portion of the present invention may include only the crotch low basis weight portion 51 and the wide low basis weight portion 52, and may not include the rear low basis weight portion 53 or the front low basis weight portion 54.
  • the absorbent article of this embodiment is suitable for use in absorbent articles intended to absorb large amounts of urine.
  • some absorbent articles intended to absorb small amounts of urine have an absorbent core positioned close to the excretory opening to quickly absorb urine.
  • absorbent articles intended to absorb large amounts of urine it is often necessary to position the absorbent core away from the body and create a space to accommodate excrement. Therefore, the absorbent article of this embodiment can be suitably used in absorbent articles intended to absorb large amounts of urine.
  • the present invention provides a pants-type absorbent article that has a space in the crotch region to accommodate body waste, preventing side leakage even when the garment is not pulled up sufficiently.

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 propose un article absorbant présentant un espace dans une région d'entrejambe pour stocker des déchets excrétés, et pouvant supprimer une fuite latérale même lorsqu'il est insuffisamment étiré. L'article absorbant (10) comprend un sens avant-arrière (L), un sens de largeur (W) et un sens d'épaisseur (T), et comprend une région d'entrejambe (S3), une région de taille avant (S1), une région de taille arrière (S2) et un noyau absorbant (50). Le noyau absorbant comprend une partie de grammage faible dans laquelle le grammage du matériau absorbant est inférieur à celui dans des zones environnantes. La partie de grammage faible comprend : une paire de parties de grammage faibles d'entrejambe (51) disposées dans la région d'entrejambe ; et une paire de parties de grammage faibles larges (52) disposées à l'arrière des parties de grammage faibles d'entrejambe et s'étendant vers l'extérieur dans le sens de la largeur vers le côté arrière. Les bords d'extrémité arrière des parties de grammage faibles larges sont positionnés à l'avant de parties de joint latéral (60). Le noyau absorbant présente une première région (R1) prise en sandwich entre la paire de parties de grammage faibles d'entrejambe, et une paire de secondes régions (R2) s'étendant à partir des parties de grammage faibles d'entrejambe vers les bords extérieurs du noyau absorbant. La longueur de chacune des secondes régions dans le sens de la largeur est supérieure à la longueur de la première région dans le sens de la largeur.
PCT/JP2025/006768 2024-02-29 2025-02-27 Article absorbant Pending WO2025183040A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024030791A JP2025132905A (ja) 2024-02-29 2024-02-29 吸収性物品
JP2024-030791 2024-02-29

Publications (1)

Publication Number Publication Date
WO2025183040A1 true WO2025183040A1 (fr) 2025-09-04

Family

ID=96921434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/006768 Pending WO2025183040A1 (fr) 2024-02-29 2025-02-27 Article absorbant

Country Status (2)

Country Link
JP (1) JP2025132905A (fr)
WO (1) WO2025183040A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019131269A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
JP2019118556A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 パンツ型吸収性物品

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019131269A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
JP2019118556A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 パンツ型吸収性物品

Also Published As

Publication number Publication date
JP2025132905A (ja) 2025-09-10

Similar Documents

Publication Publication Date Title
JP5649361B2 (ja) 吸収性物品
WO2020116554A1 (fr) Couche jetable
JP2859743B2 (ja) 吸収性物品
JP2019022727A (ja) パンツ型吸収性物品
WO2015052993A1 (fr) Article à porter
JP7706620B2 (ja) 吸収性物品
WO2025183040A1 (fr) Article absorbant
JP3425348B2 (ja) 使い捨て着用物品
JP7349272B2 (ja) 吸収性物品
JP7385359B2 (ja) 吸収性物品
JP7735605B1 (ja) 吸収性物品
JP6510329B2 (ja) ショーツ型ナプキン
JP7608397B2 (ja) 吸収性物品及び吸収性物品の包装体
WO2025183041A1 (fr) Article absorbant
JP7558758B2 (ja) 吸収性物品
JP7489908B2 (ja) 吸収性物品の個装構造
JP3243460U (ja) 吸収性物品
CN112118817B (zh) 短裤型吸收性物品
WO2020036172A1 (fr) Article absorbant
CN112672720B (zh) 吸收性物品
JP7200088B2 (ja) 吸収性物品
JP7203719B2 (ja) 吸収性物品
JP2025169673A (ja) 吸収性物品
WO2025183044A1 (fr) Article absorbant
JP2024079559A (ja) 吸収性物品

Legal Events

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

Ref document number: 25761935

Country of ref document: EP

Kind code of ref document: A1