US20120278975A1 - Pants-type disposable wearing article - Google Patents

Pants-type disposable wearing article Download PDF

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Publication number
US20120278975A1
US20120278975A1 US13/521,493 US201113521493A US2012278975A1 US 20120278975 A1 US20120278975 A1 US 20120278975A1 US 201113521493 A US201113521493 A US 201113521493A US 2012278975 A1 US2012278975 A1 US 2012278975A1
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United States
Prior art keywords
segment
elasticized
regions
region
dimension
Prior art date
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Abandoned
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US13/521,493
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English (en)
Inventor
Mariko Yamashita
Toshifumi Otsubo
Tatsuya Hashimoto
Ryuichi Kamiyama
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Unicharm Corp
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Unicharm Corp
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Assigned to UNICHARM CORPORATION reassignment UNICHARM CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMASHITA, MARIKO, HASHIMOTO, TATSUYA, KAMIYAMA, RYUICHI, OTSUBO, TOSHIFUMI
Publication of US20120278975A1 publication Critical patent/US20120278975A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A61F13/4963—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs characterized by the seam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49466—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the waist region
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/5605—Supporting or fastening means specially adapted for sanitary napkins or the like
    • A61F13/5611—Supporting or fastening means specially adapted for sanitary napkins or the like using fastening strips, e.g. adhesive, on the undergarment-facing side
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/58—Adhesive tab fastener elements
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/58—Adhesive tab fastener elements
    • A61F2013/586—Adhesive tab fastener elements on lateral flaps

Definitions

  • the present invention relates to pants-type disposable wearing articles and, more particularly, to pants-type disposable wearing articles such as disposable diapers, disposable toilet-training pants, disposable incontinent pants, disposable sanitary pants and the like respectively of pants-type, wherein front and rear waist regions are joined together along respective side edges thereof by side seams each including a plurality of sealing spots.
  • JP 2008-136651 A discloses a pants-type disposable wearing article having a front waist region, a rear waist region, a crotch region extending between the front and rear waist regions and side seams provided along the side edges of the front and rear waist spots, each of the side seams including a plurality of sealing spots arranged intermittently in a longitudinal direction of the diaper.
  • the sealing spot having a smallest width dimension i.e., a narrowest sealing spot
  • a narrowest sealing spot is positioned at the midpoint of the side seam between the top and bottom segments thereof so that a seam width of the sealing spot may be gradually reduced from the top and bottom segments toward the narrowest sealing spot.
  • An object of the present invention is to provide a pants-type disposable wearing article wherein each of the side seams has a desired joint strength and the joint should not unintentionally be released particularly in the bottom segment during use of the wearing article.
  • a pants-type disposable wearing article having a longitudinal axis and a transverse axis being orthogonal thereto, and including a front waist region, a rear waist region, a crotch region extending between the front and rear waist regions, a waist-opening and side seams by which the front and rear waist regions are joined together along side edges thereof.
  • the side seams are respectively formed of a plurality of sealing spots arranged intermittently in a direction along the longitudinal axis and includes a top segment located in the vicinity of the waist-opening and a bottom segment located in the vicinity of the crotch region, and each of the sealing spots has a substantially uniform area and a dimension of the bottom segment in a direction along the transverse axis is larger than a dimension of the top segment in the direction along the transverse axis.
  • the present invention further includes one or more of the following embodiments.
  • a dimension of the side seams in the direction along the longitudinal axis is gradually reduced from the outside toward the inside as viewed in the direction along the transverse axis in the bottom segment of the side seams.
  • the side seams includes an intermediate segment extending between the top segment and the bottom segment; the opposite side edges of the front and rear waist regions respectively include non-elasticized regions formed of a non-elasticized outer sheet, first elasticized regions lying below the non-elasticized regions and formed of the outer sheet and an elasticized inner sheet and second elasticized regions lying below the first elasticized regions and formed of the inner and outer sheets and stretchable leg elastic elements bonded to the inner and outer sheets; and the top segments are formed in the non-elasticized regions, the intermediate segments are formed in the first elasticized regions and the bottom segments are formed in the second elasticized regions.
  • An area ratio of the sealing spots in the top segment formed in the non-elasticized region is lower than both of an area ratio of the sealing spots in the intermediate segment formed in the first elasticized region and an area ratio of the sealing spots in the bottom segment formed in the second elasticized region.
  • the sealing spots are arranged obliquely to the longitudinal axis and shaped so that a width dimension of the sealing spots is gradually enlarged in a direction of top-to-bottom.
  • each of the sealing spots forming the respective side seams has the substantially uniform area and the dimension of the bottom segment in the direction along the transverse axis is larger than the dimension of the top segment in the direction along the transverse axis.
  • FIG. 1 is a perspective view of a disposable diaper as one example of pants-type disposable wearing articles according to a first embodiment of the present invention.
  • FIG. 2 is a partially cutaway plan view showing the diaper as has been flatly developed.
  • FIG. 3 is an exploded perspective view of the diaper.
  • FIG. 4 is a schematic sectional view taken along line IV-IV in FIG. 2 .
  • FIG. 5 is a partially enlarged diagram showing a region enclosed by a dashed-dotted line in FIG. 1 .
  • FIG. 6 is a partially enlarged diagram showing a region enclosed by a dashed-dotted line in FIG. 5 .
  • FIGS. 7( a )-( b ) are diagrams similar to FIG. 6 , showing second and third embodiments of the present invention.
  • FIG. 1 is a perspective view of a disposable diaper 10 as one example of the pants-type disposable wearing articles according to a first embodiment of the present invention
  • FIG. 2 is a partially cutaway plan view showing the diaper 10 as has been flatly developed
  • FIG. 3 is an exploded perspective view of the diaper 10
  • FIG. 4 is a schematic sectional view taken along the line IV-IV in FIG. 2 .
  • a longitudinal axis of the diaper 10 is designated by P and a transverse axis thereof is designated by Q.
  • the diaper 10 is shaped symmetrically about the longitudinal axis P.
  • the diaper 10 has a longitudinal direction Y, a thereto orthogonal transverse direction X, a side facing a wearer's skin, a side facing away from the wearer's skin, a chassis 11 defining an outer shape of the diaper 10 and a liquid-absorbent structure 12 lying on the side of the chassis 11 facing the wearer's skin.
  • the diaper 10 has a front waist region 13 , a rear waist region 14 , a crotch region 15 extending between the front and rear waist regions 13 , 14 , front and rear ends 16 , 17 opposed to each other in the longitudinal direction Y and extending in the transverse direction X and opposite side edges 18 , 19 opposed to each other in the transverse direction X and extending in the longitudinal direction Y.
  • the opposite side edges 18 , 19 are respectively concavely curved in the crotch region 15 so that these side edges 18 , 19 may come in close contact with a wearer's thighs at a desired fit.
  • Opposite side edges 22 , 23 of the front waist region 13 which will be referred to hereinafter as front opposite side edges 22 , 23 and opposite side edges 24 , 25 of the rear waist region 14 which will be referred to hereinafter as rear opposite side edges 24 , 25 partially constitute the opposite side edges 18 , 19 .
  • the front side edges 22 , 23 and the rear side edges 24 , 25 respectively opposed in a front-back direction of the diaper 10 are joined together by the respective side seams 26 extending intermittently in the longitudinal direction Y to form a waist-opening 27 and a pair of leg-openings 28 (See FIG. 1 ).
  • the sheets are put flat and fusion-bonded together by a plurality of concave sealing spots 29 formed so as to be deferred by heat- or ultrasonic-embossing and intermittently arranged in the longitudinal direction Y.
  • the chassis 11 includes a substantially trapezoidal first outer sheet 30 lying on the non-skin-facing side and defining the front waist region 13 , a substantially trapezoidal second outer sheet 31 defining the rear waist region 14 , a first inner sheet 32 extending in the transverse direction X in the front waist region 13 and bonded to the side of the first outer sheet 30 facing the wearer's skin, a second inner sheet 33 extending in the transverse direction X in the rear waist region 14 and bonded to the side of the second outer sheet 31 facing the wearer's skin and a substantially rectangular intermediate sheet 34 extending between the first and second outer sheets 30 , 31 so as to define a midportion of the crotch region 15 .
  • the first outer sheet 30 and the first inner sheet 32 are bonded to each other with hot melt adhesives 41 to form a first laminated sheet 37 .
  • the second inner sheet 33 has a width dimension smaller than that of the first inner sheet 32 and the second outer sheet 31 is bonded to the second inner sheet 33 hot melt adhesives 42 to form a second laminated sheet 38 .
  • the intermediate sheet 34 includes a substantially rectangular fibrous nonwoven fabric sheet 39 lying on the non-skin-facing side and a moisture-previous but liquid-impervious plastic sheet 40 lying on the side facing the wearer's skin and substantially the same as the fibrous nonwoven fabric sheet 39 in shape as well as in size bonded to each other with hot melt adhesives (not shown).
  • the chassis 11 further includes a graphic film 44 made of a plastic material located in the central area of the rear waist region 14 as viewed in the transverse direction X and printed on its side facing away from the wearer's skin with graphics (not shown) or the like adapted to be visually recognized from the outside and a fixing sheet 45 formed of a fibrous nonwoven fabric extending on the side of the chassis 11 facing the wearer's skin across the crotch region 15 into the front and rear waist regions 13 , 14 .
  • the fixing sheet 45 has a width dimension larger than that of the intermediate sheet 34 and covers, in the central area of the crotch region 15 , the entire side of the intermediate sheet 34 facing the wearer's skin.
  • the first outer sheet 30 is folded inward to form a front turnback 46 within which two or more strand-like first waist elastic elements 47 made of elastomers are contractibly attached under tension.
  • the second outer sheet 31 is folded inward to form a rear turnback 48 within which two or more strand-like second waist elastic elements 49 made of elastomers are contractibly attached under tension.
  • tape-like front leg elastic elements 50 R, 50 L made of elastomers are attached to the inner surface of the first outer sheet 30 .
  • tape-like rear leg elastic elements 51 R, 51 L made of elastomers are attached to the inner surface of the second outer sheet 31 .
  • the rear leg elastic elements 51 R, 51 L and parts of the front leg elastic elements 50 R, 50 L are coated on respective outer surfaces thereof with hot melt adhesives (not shown) and attached to the fixing sheet 45 with the hot melt adhesives.
  • the first and second outer sheets 30 , 31 are respectively formed of heat-sealable spun bonded nonwoven fabric having substantially no elastic stretch properties.
  • This fibrous nonwoven fabric has an apparent thickness of about 0.3 to 0.5 mm, a mass per unit area of about 15 to about 40 g/m 2 , preferably about 25 to about 35 g/m 2 , a fiber density of about 0.06 to about 0.1 g/cm 3 , preferably about 0.07 to about 0.09 g/cm 3 .
  • the first and second outer sheets 30 , 31 maybe formed of two or more layers and the respective outermost fiber layers may be formed of crimped spun bonded filament fibers.
  • the first and second outer sheets 30 , 31 may be formed of a fibrous nonwoven fabric having an elastic contraction percentage lower than that of the first and second outer sheets 32 , 33 .
  • the first and second inner sheets 32 , 33 are respectively formed of an elastically stretchable air-through fiber (staple) nonwoven fabric or a spun bonded nonwoven fabric both made of heat-sealable elastomer fibers.
  • Such nonwoven fabric has an apparent thickness of about 0.9 to about 1.0 mm, a mass per unit area of about 20 to about 50 g/m 2 , preferably about 30 to about 40 g/m 2 and a fiber density of about 0.01 to about 0.04 g/cm 3 , preferably about 0.025 to about 0.035 g/cm 3 .
  • the first and second outer sheets 30 , 31 have a stretch ratio of about 100 to about 150% and the first and second inner sheets 32 , 33 have a stretch ratio of about 150 to 300%.
  • the first and second inner sheets 32 , 33 are bonded under tension at a ratio of about 2.0 to about 3.0 to the first and second outer sheets 30 , 31 with hot melt adhesives.
  • Hot melt adhesives 41 , 42 used to bond the first and second outer sheets 30 , 31 to the first and second inner sheets 32 , 33 are not limited to any particular types and various types of adhesives widely used in the related technical field may be used without limitation so long as a desired elasticity for the first and second inner sheets 32 , 33 is not affected.
  • rubber-based adhesives such as SBS (styrene-butadiene-styrene)-adhesives or SIS (styrene-isoprene-styrene)-adhesives, each having a mass per unit area of about 1.0 to 5.0 g/m 2 is preferably used for this purpose.
  • Coating patterns for hot melt adhesives 41 , 42 may be selected from various well known patterns such as a Q-pattern, a spiral pattern, a dotted pattern and a wavy pattern.
  • the intermediate sheet 34 and the fixing sheet 45 may be formed of a spun bonded fibrous nonwoven fabric and/or an inelastic air-through fibrous nonwoven fabric similarly to the first and second outer sheets 30 , 31 .
  • the liquid-absorbent structure 12 has a vertically long rectangular shape extending across the crotch region 15 into the front and rear waist regions 13 , 14 contoured by front and rear ends and opposite side edges which are orthogonal to the front and rear ends.
  • the liquid-absorbent structure 12 comprises a liquid-previous inner sheet 53 lying on the side facing the wearer's skin, a liquid-absorbent core 55 formed of wrapping a liquid-absorbent material assembly including a mixture of fluff pulp fibers and superabsorbent polymer particles with a liquid-dispersant sheet (not shown), a cover sheet 56 lying on the non-skin-facing side so as to cover the entire liquid-absorbent core 55 from the non-skin-facing side and a leakage-barrier sheet 57 formed of a plastic material and sandwiched between the liquid-absorbent core 55 and the cover sheet 56 .
  • the cover sheet 56 has opposite laterals extending outward in the transverse direction X beyond the opposite side edges of the liquid-absorbent core 55 . These laterals are partially folded inward to form a pair of sleeve-like side flaps 58 R, 58 L extending in the direction of the longitudinal axis P. Within the respective side flaps 58 R, 58 L, four strand-like elastic elements 59 , 60 made of elastomers and extending in the longitudinal direction Y are contractibly attached under tension with hot melt adhesives.
  • the respective two elastic elements 59 a , 60 a lying outside are located in the middle of the crotch region 15 as viewed in the longitudinal direction Y and cooperate with the first and second leg elastic elements 50 R, 50 L, 51 R, 51 L to define elastic belt-like zones adapted to extend along the wearer's inguinal regions when the diaper 10 is put on the wearer's body.
  • the respective two elastic elements 59 b , 60 b lying inside extend within the respective side flaps 58 R, 58 L across the crotch region 15 into the front and rear waist regions 13 , 14 .
  • the opposite laterals of the cover sheet 56 are spaced upward from the inner sheet 53 to form barrier- or gasket-cuffs adapted to prevent sideways leakage of body waste.
  • the side of the liquid-absorbent structure 12 facing away from the wearer's skin is entirely or partially bonded to the side of the chassis 11 facing the wearer's skin with hot melt adhesives (not shown).
  • a rear end of the liquid-absorbent structure 12 is sandwiched between the second inner sheet 33 and the second outer sheet 31 and thereby body waste should not leak out beyond the rear end of the liquid-absorbent structure 12 .
  • first and second inner sheets 32 , 33 are limited to the front and rear waist regions 13 , 14 , respectively, according to the illustrated embodiment, it is possible to provide the first and second inner sheets 32 , 33 so as to extend into the crotch region 15 . It is also possible to form the chassis 11 as a whole of inner and outer sheets each defining the outer shape of the diaper 10 instead of providing the fixing sheet 45 on the side facing the wearer's skin so that the diaper 10 as a whole may have stretch properties.
  • FIG. 5 is a partially enlarged diagram showing a region enclosed by a dashed-dotted line in FIG. 1 .
  • the first inner sheet 32 and the first leg elastic element 50 L are indicated by broken lines for convenience of explanation.
  • the rear waist region 14 has a construction basically similar to that of the front waist region 13 and, in view of this, description will be made hereinafter with respect only to the front waist region 13 .
  • FIG. 5 illustrates a side seam 26 as if the side seam 26 is divided into a top segment 71 lying in the vicinity of the peripheral edges 27 a of the waist-opening, a bottom segment 72 lying in the vicinity of the peripheral edge 28 a of the leg-opening and an intermediate segment 73 extending between the top and bottom segments 71 , 72 .
  • the top segment 71 is formed in a non-elasticized region 63 defined by the front turnback 46 of the first outer sheet 30 along the side edge 19 of the diaper 10
  • the intermediate segment 73 is formed in a first elasticized region 64 in which the first outer sheet 30 and the elasticized first inner sheet 32 are present
  • the bottom segment 72 is formed in a second elasticized region 65 in which the first inner and outer sheets 30 , 32 overlap the first leg elastic element 50 R.
  • a dimension l 2 of the top segment 71 ranges about 10 to 30 mm
  • a dimension l 3 of the intermediate segment 73 ranges about 80 to 50 mm
  • a dimension l 4 of the bottom segment 72 ranges about 10 to 40 mm.
  • the respective sealing spots 29 in the respective segments 71 , 72 , 73 are substantially the same in the shape as well as in the area and arranged intermittently in the longitudinal direction Y as well as in the transverse direction X.
  • a distance between each pair of the adjacent sealing spots in the longitudinal direction Y is larger in the top segment 71 than in the intermediate segment 73 but such a distance in the intermediate segment 73 is substantially the same in the bottom segment 72 .
  • the bottom segment 72 and the intermediate segment 73 respectively have a given sealing area but a sealing area in the top segment 71 in the vicinity of the peripheral edge 27 a of the waist-opening is smaller than those in the intermediate segment 73 and the bottom segment 72 .
  • the side edge 19 can be easily torn from the top segment 71 when the used diaper 10 is removed from the wearer's body.
  • the respective sealing spots 29 are arranged not contiguously one to another but intermittently in the longitudinal direction Y as well as in the transverse direction X, i.e., these sealing spots 29 are arranged in a zigzag pattern.
  • the side edge 19 of the diaper 10 is adapted to be torn zigzag in the longitudinal direction Y. Therefore, even if the top segment 71 or the bottom segment 72 is partially in an unsealed state, the side seam 26 should not be unintentionally unsealed over a wide range during use of the diaper 10 .
  • the distance between each pair of the adjacent sealing spots 29 in the top segment 71 as measured in the longitudinal direction Y is preferably about 2.0 to about 6.0 mm and the distance between each pair of the adjacent sealing spots 29 in the intermediate segment 73 and the bottom segment 72 as measured in the longitudinal direction Y is preferably about 0.5 to about 4.0 mm.
  • the sealing spots 29 are arranged close together in comparison to the top segment 71 and the intermediate segment 73 and, in addition, a dimension of the side seam 26 in the transverse direction X is larger than the top segment 71 and the intermediate segment 73 . More specifically, while the top segment 71 and the intermediate segment 73 respectively comprise two columns of the sealing spots 29 zigzag arranged, the bottom segment 72 comprises three or more columns of the sealing spots 29 inclusive of the above-mentioned two columns.
  • a substantial circumferential dimension of the diaper 10 in the vicinity of the peripheral edge 28 a of the leg-opening can be made narrower than a substantial circumferential dimension of the diaper 10 in the vicinity of the peripheral edge 27 a of the waist-opening. Consequentially, the diaper 10 comes in contact about the wearer's thighs at sufficient fit to prevent body waste from leaking sideways and, at the same time, the waist-opening 27 ensures a sufficient dimension to facilitate the diaper 10 to be put on the wearer's body.
  • a width dimension W 1 of the side seam in the top segment 71 and the intermediate segment 73 in the transverse direction X is about 0.5 to about 5.5 mm and a width dimension W 2 of the side seam in the bottom segment 72 in the transverse direction X is about 3.0 to about 6.0 mm.
  • the sealing spots 29 in the segments 71 , 72 , 73 have area ratios preferably of about 3.4 to about 4.0%, about 7.5 to about 9.0% and 4.4 to about 5.0%, respectively, of a given width (6 mm) of the non-elasticized region 63 , the first elasticized region 64 and the second elasticized region 65 .
  • the respective sealing spots 29 have a substantially uniform area and the bottom segment 72 has a width dimension larger than that of the top segment 71 .
  • the bottom segment 72 will have seam strength higher than that of the other segments 71 , 73 so long as the top segment 71 and the bottom segment 72 comprise the sheets laminated under the same conditions.
  • the bottom segment 72 extending in the vicinity of the peripheral edge 28 a of the leg-opening would otherwise be apt to get wrinkled due to movements of the wearer's leg and to unseal the laminated sheets.
  • the bottom segment 73 according to the present embodiment has relatively high seam strength and the seam array should not be unintentionally unsealed.
  • the first leg elastic element 50 L made of elastic materials such as urethane is sandwiched between the first inner sheet 32 and the first outer sheet 30 and bonded thereto.
  • Such arrangement would otherwise make it difficult to fusion bond the sheets under pressure and, in consequence, the seam strength would otherwise be lower in the bottom segment 72 than in the top segment 71 .
  • the width of the bottom segment 72 is dimensioned to be larger than that of the top segment 71 so that the sealing area may be larger in the bottom segment 72 than in the top segment 71 according to the present embodiment. In this way, the bottom segment 72 ensures sufficient seam strength to eliminate the possibility that this segment might be unsealed during use of the diaper 10 .
  • seam strength per unit area (1 inch) was 10 to 25 N/inch in the top segment 71 , 8 to 18 N/inch in the intermediate segment 73 and 10 to 35 N/inch in the bottom segment 72 .
  • the bottom segment 72 is shaped so as to extend obliquely inward from the intermediate segment 73 so that the width of the segment 73 may be gradually enlarged as the segment 72 slopes down inward. More specifically, a dimension of the innermost column in the bottom segment 72 as viewed in the longitudinal direction Y is smaller than that of the column immediately adjacent thereto and the dimension of this adjacent column in the longitudinal direction Y is smaller than that of further outer two columns (defining the top segment 71 and the intermediate segment 73 ). In this manner, the bottom segment 72 is step wisely configured as a whole.
  • the bottom segment 72 obliquely extends inward from the intermediate segment 73 , facilitating the bottom segment 72 to be torn.
  • any amount of body waste flow into the front waist region 13 such amount of body waste can be quickly moved onto the liquid-absorbent structure 12 without the possibility that the amount of body waste might be accumulated on the step defined between the intermediate segment 73 and the bottom segment 72 .
  • FIG. 6 is a partially enlarged diagram showing a region enclosed by a dashed-dotted line in FIG. 5
  • FIGS. 7( a )-( b ) are diagrams similar to FIG. 6 , showing second and third embodiments of the present invention. Both the second embodiment and the third embodiment are similar to the first embodiment so long as the basic construction is concerned and therefore the description given hereinafter will be limited to features of these second and third embodiments differing from those of the first embodiment.
  • each of the sealing spots 29 has a substantially triangular shape arranged obliquely to the longitudinal axis P of the diaper 10 .
  • the sealing spots 29 are arranged intermittently in the direction of the longitudinal axis P as well as in the direction of the transverse axis Q and obliquely to the longitudinal axis P of the diaper 10 .
  • Each of the sealing spots 29 is arranged so that its area may be gradually enlarged downward (i.e., toward the base) from the upper corner 29 a (i.e., apex angle).
  • the force acting to tear the respective sealing spots 29 which is generated when the front and rear waist regions 13 , 14 are pulled apart in the front-back direction of the diaper 10 by gripping the side edges 23 , 25 of the front and rear waist regions 13 , 14 is first locally exerted on the upper corner 29 a and this force can be smoothly transmitted to a region 29 b having an area gradually enlarged downward. Therefore, even when the first and second outer sheets 30 , 31 defining the top segment 71 are the sheets formed of long fibers and more difficult to be torn in the direction of the longitudinal axis P than the sheets formed of short fibers, the respective sealing spots 29 can be torn by relatively moderate force.
  • the shape of the sealing spot 29 is not limited to the shape as illustrated in FIG. 6 so long as the above-mentioned feature is ensured.
  • the sealing spot 29 may be substantially square as illustrated in FIG. 7( a ) or substantially circular as illustrated in FIG. 7( b ).
  • Each of the sealing spots 29 is relatively small and specifically has an area of about 0.25 to about 2.0 mm.
  • the above-mentioned area of the individual sealing spot 29 is preferable for this reason.
  • a dimension l 5 of the individual sealing spot 29 in the longitudinal direction Y may be appropriately set depending on the seam strength required for each of the segments 71 , 72 , 73 , it is also possible to set the seam strength so that the seam strength may gradually increase from the top segment 71 toward the bottom segment 72 .
  • the seal dimension l 5 of the individual sealing spot 29 in the top segment 71 preferably is about 0.5 to about 5.5 mm and the seal dimension l 5 of the individual sealing spot 29 in the intermediate segment 73 and the bottom segment 72 is preferably about 3.0 to 6.0 mm.

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  • 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)
  • Orthopedics, Nursing, And Contraception (AREA)
US13/521,493 2010-01-21 2011-01-17 Pants-type disposable wearing article Abandoned US20120278975A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2010011309A JP5695320B2 (ja) 2010-01-21 2010-01-21 パンツ型の使い捨て着用物品
JP2010-011309 2010-01-21
PCT/JP2011/050665 WO2011090001A1 (ja) 2010-01-21 2011-01-17 パンツ型の使い捨て着用物品

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US20120278975A1 true US20120278975A1 (en) 2012-11-08

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US13/521,493 Abandoned US20120278975A1 (en) 2010-01-21 2011-01-17 Pants-type disposable wearing article

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US (1) US20120278975A1 (ko)
EP (1) EP2526913B1 (ko)
JP (1) JP5695320B2 (ko)
KR (1) KR101621587B1 (ko)
CN (1) CN102711700A (ko)
AR (1) AR079960A1 (ko)
AU (1) AU2011208171B2 (ko)
BR (1) BR112012017748A2 (ko)
EA (1) EA201290458A1 (ko)
TW (1) TWI533859B (ko)
WO (1) WO2011090001A1 (ko)

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US20080140038A1 (en) * 2006-12-08 2008-06-12 Uni-Charm Corporation Absorbent article
US20140378925A1 (en) * 2012-01-20 2014-12-25 Daio Paper Corporation Underpants-Type Disposable Diaper
US20150148768A1 (en) * 2012-06-26 2015-05-28 Unicharm Corporation Wearing article
US20170049639A1 (en) * 2014-04-28 2017-02-23 Unicharm Corporation Underpants-type absorbent article
US10611131B2 (en) * 2016-04-19 2020-04-07 Aplix Perforated stretch laminate

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JP5566782B2 (ja) 2010-01-08 2014-08-06 ユニ・チャーム株式会社 使い捨て着用物品
JP5849759B2 (ja) * 2012-02-21 2016-02-03 王子ホールディングス株式会社 パンツ型使い捨ておむつ
JP6111971B2 (ja) * 2013-10-11 2017-04-12 王子ホールディングス株式会社 パンツ型使い捨ておむつ
BR112016005766B1 (pt) * 2013-10-11 2022-02-22 Unicharm Corporation Artigo do vestuário tipo calça descartável
US9320655B2 (en) * 2013-11-27 2016-04-26 Kimberly-Clark Worldwide, Inc. Method of manufacturing an absorbent article having a fin seam
JP6453145B2 (ja) * 2015-03-31 2019-01-16 ユニ・チャーム株式会社 使い捨ての着用物品
JP6422811B2 (ja) * 2015-03-31 2018-11-14 ユニ・チャーム株式会社 使い捨て着用物品
JP6422810B2 (ja) * 2015-03-31 2018-11-14 ユニ・チャーム株式会社 使い捨ての着用物品
JP6419012B2 (ja) * 2015-03-31 2018-11-07 ユニ・チャーム株式会社 使い捨て着用物品
JP6385311B2 (ja) * 2015-05-27 2018-09-05 ユニ・チャーム株式会社 使い捨ての着用物品
JP6412861B2 (ja) * 2015-12-28 2018-10-24 ユニ・チャーム株式会社 吸収性物品
KR102547007B1 (ko) 2017-05-31 2023-06-26 킴벌리-클라크 월드와이드, 인크. 전방 또는 후방 개방 측면-폐쇄형 흡수 용품
IL270286B2 (en) 2017-05-31 2023-03-01 Kimberly Clark Co Absorbent items with front and back side openings
GB2577429B (en) 2017-05-31 2022-05-11 Kimberly Clark Co Front or rear opening closed-sided absorbent articles
JP6462772B2 (ja) * 2017-06-05 2019-01-30 ユニ・チャーム株式会社 吸収性物品
JP6942590B2 (ja) * 2017-09-27 2021-09-29 大王製紙株式会社 パンツタイプ使い捨て着用物品
JP6745844B2 (ja) * 2018-06-29 2020-08-26 ユニ・チャーム株式会社 吸収性物品
JP6789273B2 (ja) * 2018-10-01 2020-11-25 ユニ・チャーム株式会社 吸収性物品

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US7594907B2 (en) * 2006-11-15 2009-09-29 Uni-Charm Corporation Disposable pants-type diaper having belt members
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JP3770118B2 (ja) * 2001-07-27 2006-04-26 王子製紙株式会社 パンツ型使い捨ておむつ
JP2003339772A (ja) * 2002-05-29 2003-12-02 Crecia Corp パンツ型使い捨ておむつ
JP2005287930A (ja) * 2004-04-02 2005-10-20 Kao Corp 使い捨ておむつ
JP4249097B2 (ja) * 2004-06-29 2009-04-02 王子ネピア株式会社 パンツ型使い捨ておむつ
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JP4776513B2 (ja) 2006-12-01 2011-09-21 花王株式会社 パンツ型の着用物品
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US20030045855A1 (en) * 1995-09-13 2003-03-06 Yoshio Ono Disposable absorbent undergarment
US6837961B2 (en) * 2000-08-30 2005-01-04 Kimberly-Clark Worldwide, Inc. Method of making tear-resistant adhesive/combination bond pattern
US6645189B2 (en) * 2000-10-31 2003-11-11 Uni-Charm Corporation Disposable pull-on diaper with disposal securing means
US7909807B2 (en) * 2002-01-30 2011-03-22 Uni-Charm Co., Ltd. Pants-type disposable wearing article
US20040102757A1 (en) * 2002-11-21 2004-05-27 Kimberly-Clark Worldwide, Inc. Disposable absorbent article with an elastic waistband and easy tear side seams
US20050090788A1 (en) * 2003-10-24 2005-04-28 Uni-Charm Corporation Disposable wearing article
US7594907B2 (en) * 2006-11-15 2009-09-29 Uni-Charm Corporation Disposable pants-type diaper having belt members

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080140038A1 (en) * 2006-12-08 2008-06-12 Uni-Charm Corporation Absorbent article
US8986274B2 (en) * 2006-12-08 2015-03-24 Uni-Charm Corporation Absorbent article having joint regions
US20140378925A1 (en) * 2012-01-20 2014-12-25 Daio Paper Corporation Underpants-Type Disposable Diaper
US9895276B2 (en) * 2012-01-20 2018-02-20 Daio Paper Corporation Underpants-type disposable diaper having side seal sections with welded regions of differing densities
US20150148768A1 (en) * 2012-06-26 2015-05-28 Unicharm Corporation Wearing article
US9498393B2 (en) * 2012-06-26 2016-11-22 Unicharm Corporation Wearing article
US20170049639A1 (en) * 2014-04-28 2017-02-23 Unicharm Corporation Underpants-type absorbent article
US10611131B2 (en) * 2016-04-19 2020-04-07 Aplix Perforated stretch laminate

Also Published As

Publication number Publication date
EP2526913B1 (en) 2016-10-12
TW201143736A (en) 2011-12-16
TWI533859B (zh) 2016-05-21
JP5695320B2 (ja) 2015-04-01
KR20120113261A (ko) 2012-10-12
KR101621587B1 (ko) 2016-05-16
EA201290458A1 (ru) 2013-02-28
AU2011208171B2 (en) 2015-11-05
BR112012017748A2 (pt) 2016-03-29
CN102711700A (zh) 2012-10-03
AR079960A1 (es) 2012-02-29
JP2011147608A (ja) 2011-08-04
EP2526913A4 (en) 2013-11-20
WO2011090001A1 (ja) 2011-07-28
AU2011208171A1 (en) 2012-08-09
EP2526913A1 (en) 2012-11-28

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