WO2013080837A1 - Structure d'absorption et objet portable absorbant utilisant celle-ci - Google Patents

Structure d'absorption et objet portable absorbant utilisant celle-ci Download PDF

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Publication number
WO2013080837A1
WO2013080837A1 PCT/JP2012/080027 JP2012080027W WO2013080837A1 WO 2013080837 A1 WO2013080837 A1 WO 2013080837A1 JP 2012080027 W JP2012080027 W JP 2012080027W WO 2013080837 A1 WO2013080837 A1 WO 2013080837A1
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WIPO (PCT)
Prior art keywords
thickness
thick
absorbent structure
thin
absorbent
Prior art date
Application number
PCT/JP2012/080027
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English (en)
Japanese (ja)
Inventor
竜吾 大橋
湊　大尚
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to CN201280058588.5A priority Critical patent/CN103957858B/zh
Publication of WO2013080837A1 publication Critical patent/WO2013080837A1/fr

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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
    • A61F13/53—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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • A61F13/536—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes having discontinuous areas of compression

Definitions

  • the present invention relates to an absorbent structure having body fluid absorbability and an absorbent wearing article using the same, and more specifically, an absorbent structure having a non-uniform thickness dimension, a disposable diaper using the same, and a sanitary
  • the present invention relates to absorbent wearing articles such as napkins and incontinence pads.
  • Patent Document 1 discloses an absorbent structure having a thick part having a required thickness and a thin part having a thickness dimension smaller than the thick part, and an absorbent article using the same.
  • the absorbent article disclosed in Patent Document 1 includes an absorbent structure having a locally high absorption capacity in the thick part, the thick part is formed in a region where a relatively large amount of body fluid is excreted. By arranging, the absorption performance can be sufficiently exhibited. Moreover, in this absorption structure, since the thin part is formed in the area
  • the problem of the present invention is that the absorption efficiency is excellent by having a non-uniform thickness, and bending that may induce leakage of body fluid during wearing is caused by providing a high rigidity region locally
  • An object of the present invention is to provide an absorbent structure having no fear and an absorbent wearing article using the same.
  • the first invention of the present application has at least a longitudinal direction and a transverse direction perpendicular thereto, and is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet,
  • the present invention relates to an absorbent structure for an absorbent wearing article including a liquid-absorbent core having body fluid absorbency.
  • the absorbent structure according to the first invention of the present application includes a first end edge, a second end edge facing the first end edge in the longitudinal direction, a thick portion located on the first end edge side, and a position on the second end edge side.
  • a thin portion having a thickness dimension smaller than that of the thick portion, and located between the thick portion and the thin portion, and gradually having a thickness dimension from the first edge side toward the second edge side.
  • a thickness gradient portion that becomes smaller, and the thin portion, the thickness gradient portion, and a portion of the thick portion adjacent to the thickness gradient portion are subjected to debossing to form a number of compression recesses. It is characterized by.
  • the second invention of the present application is the first and second end edges, the thick part located on the first end side, and the thin part having a smaller thickness than the thick part located on the second end side.
  • a thickness gradient portion that is located between the thick portion and the thin portion and gradually decreases in thickness from the first end side toward the second end side, and the thin portion
  • An absorbent structure that has been subjected to debossing to form a number of compression recesses in the thickness gradient portion and a portion of the thick portion adjacent to the thickness gradient portion, a front waist region, and a rear
  • a diaper body having a waist region and a crotch region located between the front and rear waist regions, wherein the absorbent structure extends from the front waist region to the rear waist region, and the first edge of the absorbent structure Is located on the front waist region side, and the second end edge is located on the rear waist region side.
  • It said adjacent portion and said thickness gradient portion relates to an absorbent wearing article positioned in the crotch region.
  • the thickness gradient portion is located between the thick portion and the thin portion, a step due to a sudden change in thickness dimension is generated. Absent.
  • body fluid may be caused by partial cracks due to changes in rigidity or the occurrence of steps. There is no risk of leakage.
  • a high-stiffness area that has been subjected to debossing to form a large number of compression recesses is located in a part adjacent to the thickness gradient part of the thick part, the part is clamped and deformed. There is no risk of partial cracking or tearing even if the force is applied.
  • the thick part of the absorbent structure can sufficiently exhibit its absorption performance by being located in the front waist region and the crotch region where urine is excreted, Since the thin part is located in the rear waist region, the wearability of the wearer's buttocks is improved, and the absorption efficiency of the entire absorbent structure is excellent. In addition, since the high rigidity region formed in the portion adjacent to the thickness gradient portion of the thick portion is located in the crotch region, even if the portion is sandwiched between the wearer's thighs, partial cracking or tearing occurs. There is no risk of it occurring.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 2.
  • the top view of the absorption structure which shows the external shape of a diaper with a virtual line.
  • FIG. 5 is a sectional view taken along line VV in FIG. 4. The figure which shows a part of manufacturing process of an absorption structure.
  • a diaper 10 has a longitudinal axis P and a transverse axis Q orthogonal thereto, a longitudinal direction Y parallel to the longitudinal axis P, and a transverse direction X parallel to the transverse axis Q, and a front waistline.
  • the diaper main body 14 provided with the area
  • the diaper main body 14 includes a front end edge 14a and a rear end edge 14b that extend straight in the lateral direction X, side edges 14c and 14d that are inwardly bent in the crotch region 13, and a top sheet 15 that is positioned on the skin facing surface side. And a liquid-impermeable back sheet 16 positioned on the non-skin facing surface side, and an absorbent structure 17 interposed between the top sheet 15 and the back sheet 16. Further, an intermediate sheet 18 is optionally disposed between the top sheet 15 and the absorbent structure 17, and a pair of containment sheets 20 symmetrical about the vertical axis P is disposed on the skin facing surface side of the diaper 10. Has been.
  • the top sheet 15 can be formed from various fiber nonwoven fabrics having substantially liquid permeability, for example, air-through fiber nonwoven fabrics having a mass of about 15 to 45 g / m 2 , porous plastic films, laminate sheets thereof and the like.
  • the backsheet 16 is made of various known fiber nonwoven fabrics that are substantially liquid-impervious, such as spunbond nonwoven fabrics, point bond nonwoven fabrics, SMS (spunbond meltblown materials having a mass in the range of about 10 to 40 g / m 2. -Spun band) It can be formed from a nonwoven fabric, a liquid-impervious plastic film, or a laminate sheet with at least one of these nonwoven fabrics.
  • the intermediate sheet 18 can be formed of various known fiber nonwoven fabrics that are substantially air permeable and liquid permeable, such as an air-through nonwoven fabric having a mass of about 15 to 45 g / m 2 , and is a cushion against the wearer's skin.
  • an air-through nonwoven fabric having a mass of about 15 to 45 g / m 2 , and is a cushion against the wearer's skin.
  • the body fluid is not diffused into the delusion and the top sheet 15 and the absorption structure 17 are separated to prevent the body fluid from flowing back to the top sheet 15 in the delusion.
  • the containment sheet 20 can be formed from a hydrophobic fiber nonwoven fabric, a moisture-permeable and leak-proof plastic film, a laminate thereof, and the like.
  • a hydrophobic fiber nonwoven fabric for example, an SMS fiber nonwoven fabric or a span having a mass of about 10 to 30 g / m 2 can be used. It can be formed from a bond fiber nonwoven fabric or the like.
  • the absorbent structure 17 includes front and rear end edges (first and second end edges) 17a and 17b, and both side edges 17c and 17d extending in the longitudinal direction Y between the front and rear end edges 17a and 17b.
  • both side edges 17c and 17d are concave curved to bend to the vertical axis P in the vicinity of the central portion of the straight portion 21 and the crotch region 13 that extend straight on the front waist region 11 side and the rear waist region 12 side.
  • Section 22 Further, the side edges 17c and 17d have bent portions 23 and 24 located at portions where the straight portion 21 and the concave curved portion 22 intersect.
  • a front area (first area) 51 is formed between the straight sections 21 on the front waist area 11 side
  • a rear area (second section) 52 is formed between the straight sections 21 of the rear waist area 12, and a concave curved section.
  • a central portion 53 is defined between 22.
  • the absorbent structure 17 is composed of a superabsorbent polymer particle (SAP), fluff pulp, and optionally a thermoplastic synthetic fiber (staple fiber) and shaped into a predetermined shape, and its shape retention. And a sheet having liquid diffusibility, for example, formed from a non-woven fiber nonwoven sheet having liquid permeability, which covers the liquid-absorbing core for improving liquid diffusibility. On the lower surface of the absorbent structure 17, a leak-proof sheet 25 formed from a liquid-impervious fiber nonwoven fabric is disposed.
  • the absorbent structure 17 may be formed of only the liquid-absorbent core as long as the effects of the present embodiment described later are exhibited.
  • the leak-proof sheet 25 is a moisture-permeable and leak-proof plastic film, a substantially liquid-impervious SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, a spunbond fiber nonwoven fabric having a mass of about 10 to 30 g / m 2 , Or it can form from a laminate sheet etc. with at least one of those nonwoven fabrics.
  • SMS spunbond / meltblown / spunbond
  • the diaper main body 14 includes front and rear end flaps 27 and 28 extending in the lateral direction X outside the front and rear end edges 17 a and 17 b of the absorbent structure 17, and both sides of the absorbent structure 17.
  • a pair of side flaps 29 and 30 extending in the vertical direction Y are provided outside the edges 17c and 17d in the horizontal direction X.
  • the front and rear end flaps 27 and 28 include a containment sheet 20, a top sheet 15, a leak-proof sheet 25, and a back sheet 16 that extend outward in the vertical direction Y from the front and rear end edges 17 a and 17 b of the absorbent structure 17. It is formed by overlapping each other.
  • the side flaps 29 and 30 are the top sheet
  • a fixing portion 34a of a pair of tape fastener tabs 34 is interposed between both side edges of the containment sheet 20 and the back sheet 16 of the rear side flap 32 where the rear end flap 28 and the side flaps 29 and 30 intersect. It is fixed via a hot melt adhesive applied to the inner surfaces of both sheets 16 and 20.
  • a first fastening element 35 having a hook group of mechanical fasteners is provided on a free portion 34b of the tape fastener tab 34 extending outward in the lateral direction X from the side edge of the rear side flap 32 (side edge of the rear waist region 12). Is provided.
  • the first fastening element 35 is removably fastened to the second fastening element 36 having a loop group of mechanical fasteners extending in the lateral direction X on the outer surface of the front waist region 11.
  • An opening 37 and a pair of leg openings 38 are defined (FIG. 1).
  • An elastic waistband formed of a belt-like elastic repulsion member having cushioning properties such as urethane foam having open cells between the top sheet 15 and the leak-proof sheet 25 forming part of the front and rear end flaps 27 and 28 40 is disposed. Further, between the back sheet 16 forming a part of the side flaps 29 and 30 and the containment sheet 20, a plurality of strand-like or string-like leg elastic elements 41 can shrink in the longitudinal direction Y. (Not shown).
  • the containment sheet 20 includes a proximal edge 42 that forms part of the side flaps 29 and 30, a skin facing surface of the top sheet 15 in the front and rear waist regions 11 and 12, and a lateral direction X from the top sheet 15 of the back sheet 16.
  • the front and rear fixed end portions 43 and 44 fixed to the skin-facing surface of the portion extending outwardly with a hot-melt adhesive, and the burr sheet 20 extending in the longitudinal direction Y between the front and rear fixed end portions 43 and 44.
  • a distal edge 45 formed by bending the inner edge of the inward.
  • a plurality of strand-like or string-like cuff elastic elements 46 extending in the longitudinal direction Y are fixed to the distal edge 45 so as to be contractible in the longitudinal direction Y.
  • the distal edge 45 is separated from the skin-facing surface of the top sheet 15 by the contraction action of the cuff elastic element 46 when the diaper 10 is worn, and a pair of containment cuffs for preventing side leakage of excrement
  • the thickness direction of the absorbent structure 17 is indicated by Z in FIG. 4, and the absorbent structure 17 includes a front region (first region) 51 located on the front waist region 11 side and a front region 51.
  • the center located between the inwardly bent portions 22 of the side edges 17c and 17d between the rear region (second region) 52 located on the rear waist region 12 side and the front region 51 and the rear region 52 Part 53.
  • the absorption structure 17 has a thicker portion 55 in which the front region 51 is thicker than the rear region 52, specifically, a relatively thick wall portion 55 extending from the front region 51 to a part of the rear region 52; Thickness dimension from the thick part 55 extending from the thick part 55 to the rear end edge 17b, and the thickness gradient part 56 extending gradually from the thick part 55 to the bottom side of the absorption structure 17 in the rearward direction. And a small thin portion 57.
  • the absorbent structure 17 is formed of a single layer extending in the longitudinal direction Y. However, the region is divided into two layers so that the thick portion 55 is thicker than the thin portion 57. Alternatively, the entire absorbent structure 17 including the thin portion 57 may be formed of a plurality of layers.
  • the entire absorbent structure 17 is formed of a single layer as in the present embodiment, the pulp fibers and options contained in the entire absorbent structure 17 are compared with the case where it is formed of a plurality of layers. Since it is mixed with thermoplastic fibers added as, it is hard to collapse and has excellent shape retention.
  • the shape can be formed using a known manufacturing method and manufacturing apparatus, and for example, it can be formed by the following method.
  • ⁇ Method of forming thick portion 55, thickness gradient portion 56 and thin portion 57> In a manufacturing apparatus having an absorbent material supply means formed from fluffed wood pulp and / or superabsorbent polymer particles and a rotary suction drum having a plurality of concave molds, the absorbent material is recessed from the supply means via a transfer pipe. Accumulated in a mold to form an aggregate (liquid absorbent core).
  • the concave mold of the drum has a mesh shape with a plurality of apertures at the bottom, and the absorbent material is sucked and accumulated in the concave mold through the apertures.
  • Depth dimensions are different so that portions corresponding to the thick portion 55, the thickness gradient portion 56, and the thin portion 57 are formed.
  • the thick portion 55 of the absorbent structure 17 having a required thickness is formed in a portion having a relatively large depth dimension
  • the thin portion 57 is formed in a portion having a relatively small depth dimension.
  • a thickness gradient portion 56 is formed at the inclined portion located between the two.
  • the absorbent structure 17 has a unique shape with a non-uniform thickness as a whole, and in the front waist region 11 and the crotch region 13, a required amount of body fluid is obtained by the thick portion 55 having a required absorption capacity. Primarily excreted urine can be reliably absorbed. Moreover, since the thin part 57 is located in the back waist region 12 side with less excretion amount of the body fluid compared with the front waist region 11 and the crotch region 13, it does not use for absorption of the body fluid in the whole absorption structure 17. There are almost no parts, and it can be said that the absorption efficiency is excellent as compared with a conventional absorption structure having a fixed shape and configuration. Furthermore, the production cost can be suppressed by minimizing the amount of the liquid-absorbent core used for the absorbent structure 17.
  • the rear region 52 becomes relatively thin toward the rear, so that the rear waist region 12 is deformed along the shape of the wearer's body. It becomes easy to fit and can improve a feeling of wearing. Furthermore, by reducing the thickness of the entire diaper 10, the diaper 10 is folded in two so that the front and rear waist regions 11, 12 are overlapped with each other, and is not bulky. Capacity is improved.
  • the absorbent structure 17 when the thick portion 55 and the thin portion 57 are directly adjacent to each other, a difference in rigidity due to a sudden change in thickness and a step between the thick portion 55 and the thin portion 57. There is a possibility that not only the wearer may feel uncomfortable by the formation of, but also a part of the absorbent structure 17 may be bent or swung near the boundary to induce leakage of body fluid. However, in the present embodiment, since the thickness gradient portion 56 is formed between the thick portion 55 and the thin portion 57, the thickness dimension changes gradually, and the rigidity due to the sudden change in the thickness dimension.
  • the thin portion 57 is formed in a region where the absorption performance of the absorbent structure 17 is not hindered, that is, a region where body fluid is not excreted so much. Specifically, it is preferable that the thin portion 57 is located on the rear waist region 12 side and has a size of about 40% with respect to the entire area of the absorbent structure 17.
  • the thickness gradient portion 56 has a length dimension L1 in the longitudinal direction Y of the absorbent structure 17 in order to prevent the wearer from feeling uncomfortable by causing a stiffness difference and a step due to a sudden change in the thickness gradient.
  • the length dimension L2 in the longitudinal direction Y is preferably about 25 to 70 mm, and more preferably about 35 to 60 mm.
  • the length dimension L2 in the vertical direction Y of the thickness gradient portion 56 is about 25 mm or less, the length of the gradual height gradient with respect to the difference in thickness dimension between the thick portion 55 and the thin portion 57 is insufficient.
  • a step is formed in the vicinity of the boundary between the thin portion 57 and the thickness gradient portion 56, which may give the wearer a feeling of strangeness.
  • the length dimension L2 in the longitudinal direction Y of the pressure gradient portion 56 is 70 mm or more, the formation region of the thick portion 55 with respect to the entire absorption structure 17 becomes small, and the body fluid by providing the thick portion 55 There is a possibility that the effect of securing the absorption capacity in this embodiment may be impaired.
  • the thick portion 55 has a thickness dimension of about 2.7 to 3.3 mm
  • the liquid absorbent core has a mass of about 220 to 260 g. / M 2 pulp fiber and SAP with a mass of about 180-220 g / m 2
  • the thin portion 56 has a thickness of about 2.2-2.8 mm
  • the absorbent core has a mass of about It can be formed from a mixture of 180 to 220 g / m 2 pulp fiber and SAP having a mass of about 140 to 180 g / m 2 . That is, the mass per unit area of the thin portion 57 is lower than that of the thick portion 55.
  • the mass per unit area of the absorbent core of the thin portion 57 is The thickness per unit area of the thick portion 55 is preferably in the range of about 50 to 85%.
  • region of the absorption structure 17 can be measured using a thickness measuring device (the product made by PEACOCK, measurement pressure: 12.5 g / cm ⁇ 2 >). Specifically, the thickness of the thick part 55 and the thin part 57 is determined by taking the absorbent structure 17 out of the diaper 10, and in the portions corresponding to the thick part 55 and the thin part 57, respectively. The sample is cut to a size of about 50 mm in length of Y ⁇ about 50 mm in length in the lateral direction X, and the thickness of the central part of the sample is measured with a thickness meter.
  • a thickness measuring device the product made by PEACOCK, measurement pressure: 12.5 g / cm ⁇ 2 >.
  • a second debossed portion in which a plurality of compression recesses 60 are arranged in a staggered manner in the longitudinal direction Y of the absorbent structure 17 in the thickness gradient portion 56 and the thickness portion 55 adjacent to the thickness gradient portion 56 63 is provided.
  • a thickness gradient portion 56 is formed between the thick portion 55 and the thin portion 57, but by forming the first and second debossed portions 61 and 63, The rigidity of the thin portion 57 and the thickness gradient portion 56 can be increased, and the difference in rigidity between the thin portion 57 and the thick portion 55 can be further reduced, and further deformation and loss of shape due to partial cracking of the absorbent structure 17 can be further achieved. Can be prevented.
  • the high-rigidity region 64 is located between the bent portions 24 of the side edges 17c and 17d and the vicinity thereof.
  • the bent portion 24 and the vicinity thereof are portions where the straight portion 21 and the curved portion 22 intersect each other, and the absorption structure 17 is most cracked or wrinkled due to a change in shape and movement of the wearer's crotch.
  • the thick portion 55 has higher rigidity than the thickness gradient portion 56 and the thin portion 57, the warp of the region is the thickness gradient portion 56.
  • the entire rear region 52 may reach the thin portion 57 and be separated from the wearer's body, inducing leakage of body fluid.
  • the curved portion 22 of the absorbent structure 17 has a curved shape so as to fit along the wearer's thigh in a worn state, but when the wearer is a relatively old infant, The bent part 24 and the part behind it are clamped between the thighs, and a force to deform it acts.
  • the high rigidity region 64 having the highest rigidity in the absorbent structure 17 is provided in such a region, so that the bending region 24 is prevented from being bent and the entire rear region 52 is worn by the wearer. Can be prevented from being separated from the body.
  • the mass per unit area of the liquid-absorbent core can be locally increased to design the region to be the thickest.
  • the region acts like a rib, and the entire absorbent structure 17 becomes difficult to bend along the shape of the wearer's body, which may reduce the fit.
  • the high-stiffness region 64 is defined by the second debossed portion 63 that has been subjected to debossing, cracks and deformation starting from the vicinity of the region can be suppressed, while the absorption structure
  • the body 17 can be curved along the shape of the wearer's body, and body fluid leakage prevention due to deformation or the like and securing of the fit to the wearer's body can be realized.
  • the plurality of compression recesses 60 forming the first and second debossed portions 61 and 63 have a substantially circular shape having substantially the same size, and the second debossed portion 61 is relatively densely connected to the second debossed portion 61 and 63.
  • the debossed parts 63 are arranged relatively sparsely. Therefore, the total area ratio of the compressed recesses 60 including the first debossed portion 61 as a whole is higher than the total area ratio of the compressed recesses 62 including the second debossed portion 63 as a whole.
  • the total area ratio of the former compression recess 60 is about 12 to 18%, whereas the total area ratio of the latter compression recess 60 is about 5.0 to 9.0%.
  • the length dimension (depth) in the thickness direction Z of the compressed recess 60 is about 0.2 to 0.5 mm.
  • the total area ratio of the compression recesses 60 of the first debossed portion 61 larger than that of the second debossed portion 63, the difference in rigidity between the thin portion 57 and the thickness inclined portion 56 is reduced, and those Deformation of the absorbent structure 17 starting from the vicinity of the boundary can be prevented.
  • the 1st debossed part 61 is provided in the site
  • the first and second debossed portions 61 and 63 are formed with non-compressed portions that are not provided with a series of compression recesses 60 extending in the lateral direction X.
  • the absorbent structure 17 has a required flexibility, and by forming the non-compressed portion at least in the second debossed portion 63, the thickness gradient portion 56 and the high rigidity region are formed. It becomes easy to curve 64 along a wearer's body.
  • the value of the total area ratio of the compression recesses 60 in the first and second debossed portions 61 and 63 can be changed as appropriate, and various known patterns can be used as deboss patterns in addition to the staggered pattern.
  • adopt and the shape of the compression recessed part 60 may have various well-known shapes, such as an ellipse, a rhombus, and a strip shape other than circular.
  • a continuous absorbent structure 71 formed by connecting portions corresponding to the plurality of absorbent structures 17 in series via a transport roll (not shown) is transported in the machine direction MD.
  • the continuous absorbent structure 71 is formed by encapsulating a liquid absorbent core composed of a single layer or a plurality of layers with a liquid core wrap sheet, and the thickness gradient portion 56 and the thin portion of each absorbent structure 17 A portion 71a corresponding to 57 is recessed downward and thin.
  • the debossing process for applying the first and second debossed portions 61 and 63 to the absorbent structure 17 is a deboss that rotates in one direction and is located above the continuous absorbent structure 71.
  • a roller 72 and an anvil roller 73 having a smooth outer peripheral surface that rotates in the opposite direction to the deboss roller 72 disposed opposite to the roller 72 are configured.
  • a part of the outer peripheral surface of the deboss roller 72 has a first end edge 74a and a second end edge 74b, and gradually increases in thickness as it extends in the circumferential direction from the first end edge 74a to the second end edge 74b.
  • a raised portion 74 is provided.
  • the raised portion 74 further has a thin portion 75 located on the first end edge 74a side and a thick portion 76 located on the second end edge 74b side.
  • a plurality of bosses 77 protrude from the surface of the raised portion 74 and a part of the outer peripheral surface of the deboss roller 72 on the first end edge 74a side.
  • the boss 77 includes a first deboss group 78 corresponding to the first debossed portion 61 of each absorbent structure 17 formed in the thick portion 76 of the raised portion 74 and each absorbent structure 17 formed in the thin portion 75.
  • the second debossing portion 63 is divided into a second debossing group 80 which is larger than the first debossing group 78 and is relatively sparsely arranged.
  • hub 77 may be heated to such an extent that the sheet
  • the deboss roller 72 has a rotational speed and a continuous absorption structure such that a raised portion 74 formed on the outer peripheral surface thereof faces a portion 71 a corresponding to the thickness gradient portion 56 and the thin portion 57 of the continuous absorption structure 71.
  • the conveyance speed of the body 71 is adjusted and synchronized, and the first debossed portion 61 is formed by pressing the portion corresponding to the thin portion 57 by the first deboss group 78 of the thick portion 76 of the raised portion 74.
  • the second debossed portion 80 is formed by pressing the portion corresponding to the thickness gradient portion 56 and the high rigidity region 64 of the thick portion 55 by the second deboss group 80 of the thin portion 75 of the raised portion 74. .
  • the raised portions 74 can be formed on one deboss roller 72, and the first and second debossed portions 61, 63 having different patterns can be formed simultaneously. 63, the manufacturing process can be said to be simpler than when different debossing rollers are used. Further, since the raised portion 74 has a different thickness depending on the shape of the pressed portion of the continuous absorbent structure 71, the thickness gradient portion 56 is pressed relatively strongly and its rigidity is more than necessary. In addition, since the thin portion 57 is pressed by the thick portion 76 of the raised portion 74, the thin portion 57 can be provided with a required rigidity and can be formed thin.
  • the first and second deboss groups 78 and 80 have the same total area ratio of the bosses 77 and have different lengths of the bosses 77, that is, correspond to the thin portions 57.
  • one debossing roller performs debossing in a range corresponding to the first and second debossing processing parts 61 and 63, and the other debossing roller performs the first debossing process. Only a portion corresponding to the portion 61 may be further debossed.
  • the bending rigidity in the region other than the high rigidity region 64 in the thick portion 55 is about 0.07 to 0.14 N, which is a high rigidity.
  • the bending rigidity of the region 64 is about 0.09 to 0.2N, and the bending rigidity of the thin portion 57 is about 0.04 to 0.07N.
  • the difference in rigidity value between the thick portion 55 and the thin portion 57 is preferably about 0.04 N or less.
  • the rigidity value is 0.04 N or more, even if the thickness inclined portion 56 for buffering a sudden change in rigidity is provided, the absorption structure 17 is deformed due to a large difference in the rigidity value. May cause some cracks. Further, when the rigidity value of the high rigidity region 64 is 0.2 N or more, the rigidity value of the region in the entire absorption structure 17 is higher than that of other regions, and the absorption structure 17 is cracked starting from that. May occur or deform.
  • the bending rigidity of each part of the thick part 55 and the thin part 57 of the absorbent structure 17 can be measured using a Taber-type bending resistance tester. Specifically, the absorbent structure 17 is taken out from the diaper 10, and the thick portion 55 and the thin portion 57 are approximately rectangular having a length dimension of about 70 mm in the vertical direction X and a length dimension of about 38.1 mm in the horizontal direction X. A sample cut into a shape is prepared, and the Taber bending stiffness value of each part is measured using the test machine so that the transverse direction X is the bending direction. However, since the high rigidity region 64 of the thick portion 55 is not the size having the measurement dimension, the bending rigidity is measured using a sample having a predetermined size smaller than those measurement dimensions.
  • the division of each of the thick portion, the thickness gradient portion, and the thin portions 55, 56, and 57 of the absorbent structure 17 can be performed by the following method, for example.
  • the following method is based on the result calculated before debossing the absorbent structure 17 and based on the mass per unit area, not the thickness dimension of each part. This is because there is no change in the mass per unit area in each portion 55, 56, 57 before and after the debossing process, and the mass per unit area varies depending on the thickness dimension as described above. This means that the sections 55, 56, and 57 can be divided by such a method.
  • the absorbent structure 17 having a length dimension of about 360 mm in the longitudinal direction Y is divided into 18 sections every length dimension of about 20 mm in the longitudinal direction Y.
  • the mass (g / m 2 ) per unit area for each divided section is measured.
  • the mass value of the section with the highest mass per unit area is set to 1, and the ratio to the maximum mass value is calculated for each other section, and plotted in a table arranged in order from 1 to 18 sections. To do.
  • the boundary on the thick side (the side with the higher percentage value relative to the maximum mass value) is the boundary point at which two points connecting the adjacent points on both sides are descending
  • a point is a first boundary point that is a boundary between the thick part 55 and the thickness gradient part 56
  • a boundary point on the thin side (the side having a lower ratio value with respect to the maximum mass value) is the thickness gradient part 56 and the thin part 57.
  • the second boundary point that is the boundary of.
  • the arrangement pattern of the compression recesses 60 of the first debossed portion 61 is different from that of the second debossed portion 63.
  • the non-compressed portion where the compression recess 60 does not exist is not continuously formed in the vertical direction Y and the horizontal direction X. Therefore, in the first debossed portion 61, the rigidity of the thin portion 57 in all directions can be increased.
  • the first debossed portion 61 defines a plurality of non-compression regions 82 surrounded by the six compression recesses 60.
  • the non-compressed area 82 is relatively flexible by being surrounded by the compression recess 60, and compared to the case where the compression recesses 60 are densely arranged as in the first embodiment, the wearer The cushioning property for the body can be improved.
  • the absorbent structure 17 has a first thick portion 55 ⁇ / b> A that extends from the front region 51 to the rear of the central portion 53.
  • the second thick portion 55B has substantially the same thickness as the first thick portion 55A, or at least 1.1 times the thickness of the thin portion 57, and is a first debossed portion. 61 is not formed. As described above, the second thick portion 55B is formed on the rear end edge 17b side of the rear region 52 by the second thick portion 55B having a thickness dimension substantially equal to the first thick portion 55A. Body fluid that has not been sufficiently absorbed by the thin portion 57 can be absorbed and retained, and leakage of body fluid from the rear end edge 17b can be reliably prevented.
  • the absorbent structure 17 according to the present invention can be used not only for disposable diapers but also for various body fluid absorption treatment articles such as sanitary napkins, incontinence pads, and training pants.
  • various known materials that are usually used in this type of field can be used for each component of the diaper 10 without limitation.
  • the terms “first”, “second”, and “third” are merely used to distinguish similar elements, positions, and the like. .
  • An absorbent wearing article comprising a liquid-absorbent core having at least body fluid absorbency, having a longitudinal direction and a transverse direction perpendicular thereto, and interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet
  • the absorption structure for the first end edge, the second end edge facing the first end edge in the longitudinal direction, the thick portion located on the first end edge side, and the thickness located on the second end edge side
  • a thin portion having a thickness dimension smaller than that of the portion, and a thickness that is located between the thick portion and the thin portion and gradually decreases in thickness from the first edge side toward the second edge side.
  • a thin portion, the thickness gradient portion, and a portion of the thick portion adjacent to the thickness gradient portion are subjected to debossing to form a number of compression recesses.
  • the said absorption structure characterized by the above-mentioned.
  • the first invention disclosed in the above paragraph 0056 can include at least the following embodiments. (1) It further includes both side edges extending in the longitudinal direction between the first end edge and the second end edge and having a concave portion, and the debossing is performed from the second end edge to a part of the concave portion. It has been given up to.
  • a first debossed portion in which a plurality of the compressed concave portions by the debossing are arranged is formed on the thin portion side of the thin portion and the thickness gradient portion, and the thickness gradient portion
  • a second debossed portion in which a plurality of the compressed concave portions by the debossing are arranged is formed on the thick portion side and a part of the thick portion adjacent to the thickness gradient portion, and the first debossed portion
  • the compression recesses in the processed part are arranged more densely than those in the second debossed part.
  • the said absorption structure is comprised from the sheet
  • the second debossed portion has a plurality of uncompressed areas defined by being surrounded by the plurality of compression recesses.
  • a mass per unit area of the liquid-absorbent core of the thick part is higher than a mass per unit area of the liquid-absorbent core of the thin part, and the thickness gradient In the part, the mass per unit area of the liquid-absorbent core varies depending on the gradient of the thickness dimension.
  • (6) having a first thick part located between the first edge and the thickness gradient part, and a second thick part extending outward in the longitudinal direction from the thin part, The thickness dimensions of the first thick part and the second thick part are substantially the same.
  • First and second edges, a thick part located on the first edge side, a thin part having a smaller thickness than the thick part located on the second edge side, and the thick part A thickness gradient portion that is positioned between the thin portion and gradually decreases in thickness from the first end edge toward the second end edge, and the thin portion and the thickness gradient portion
  • a portion of the thick part adjacent to the thickness gradient part is subjected to debossing to form a number of compression recesses, a front waist region, a rear waist region, and the front and rear waists
  • Absorbent wearing articles (disposable diapers) 11 Front waist region 12 Rear waist region 13 Crotch region 14 Diaper body 15 Top sheet 16 Back sheet 17 Absorbent structure 17a First edge (front edge) 17b Second edge (rear edge) 17c, 17d Both side edges 55 Thick portion 55A First thick portion 55B Second thick portion 56 Thickness gradient portion 57 Thin portion 60 Compression recess 61 First debossed portion 63 Second debossed portion 64 High rigidity region 82 Compression area X Horizontal direction Y Vertical direction Z Thickness direction

Landscapes

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

Abstract

L'invention concerne une structure d'absorption et un objet portable absorbant utilisant celle-ci, au moyen desquels le taux d'absorption est supérieur en raison du fait d'avoir une forme d'épaisseur irrégulière, et au moyen desquels il n'y a pas d'inquiétude concernant la survenue d'une courbure, etc., qui peut donner lieu à une fuite de fluides corporels lorsque l'objet est porté par disposition de régions localement hautement rigides dans celui-ci. Une structure d'absorption (17) comprend un premier bord d'extrémité (17a) et un second bord d'extrémité (17b), une partie épaisse (55) située dans le côté de premier bord d'extrémité (17a), une partie mince (57) située dans le côté de second bord d'extrémité (17b) qui a une mesure d'épaisseur plus petite que la partie épaisse (55), et une partie de gradient d'épaisseur (56) qui est située entre la partie épaisse (55) et la partie mince (57) dans laquelle la mesure d'épaisseur devient régulièrement plus petite du premier bord d'extrémité (17a) vers le second bord d'extrémité (17b). Un travail de dégaufrage est réalisé, lequel forme une pluralité de parties de creux comprimées (60) sur la partie mince (55), la partie de gradient d'épaisseur (56) et sur les parties de la partie de gradient d'épaisseur (56) qui sont adjacentes à la partie épaisse (55).
PCT/JP2012/080027 2011-11-30 2012-11-20 Structure d'absorption et objet portable absorbant utilisant celle-ci WO2013080837A1 (fr)

Priority Applications (1)

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CN201280058588.5A CN103957858B (zh) 2011-11-30 2012-11-20 吸收构造体和采用该吸收构造体的吸收性穿着物品

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JP2011-263089 2011-11-30
JP2011263089A JP5769604B2 (ja) 2011-11-30 2011-11-30 吸収構造体及びそれを用いた吸収性着用物品

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WO2013080837A1 true WO2013080837A1 (fr) 2013-06-06

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CN (1) CN103957858B (fr)
TW (1) TWI568428B (fr)
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WO2019131268A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
WO2019131269A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
WO2020130959A1 (fr) * 2018-12-20 2020-06-25 Evyap Sabun Yag Gliserin Sanayi Ve Ticaret Anonim Sirketi Couche centrale absorbante optimisée pour produits d'hygiène

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CN104546307A (zh) * 2014-12-31 2015-04-29 广东百顺纸品有限公司 一次性吸湿用品
JP6548156B2 (ja) * 2015-03-30 2019-07-24 大王製紙株式会社 使い捨ておむつ
US10828208B2 (en) 2016-11-21 2020-11-10 The Procte & Gamble Company Low-bulk, close-fitting, high-capacity disposable absorbent pant

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FR1064352A (fr) * 1952-10-13 1954-05-13 Serviette hygiénique et dispositif pour sa fabrication
JPH03188852A (ja) * 1989-10-30 1991-08-16 Procter & Gamble Co:The 使い捨ておむつ
JP2010125199A (ja) * 2008-11-28 2010-06-10 Daio Paper Corp 吸収性物品
JP2012157528A (ja) * 2011-01-31 2012-08-23 Unicharm Corp 吸収構造体及びそれを用いた吸収性着用物品

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019131268A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
WO2019131269A1 (fr) * 2017-12-28 2019-07-04 ユニ・チャーム株式会社 Article absorbant
JP2019118574A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 吸収性物品
JP2019118573A (ja) * 2017-12-28 2019-07-22 ユニ・チャーム株式会社 吸収性物品
CN111511325A (zh) * 2017-12-28 2020-08-07 尤妮佳股份有限公司 吸收性物品
CN111511325B (zh) * 2017-12-28 2022-04-12 尤妮佳股份有限公司 吸收性物品
JP7064876B2 (ja) 2017-12-28 2022-05-11 ユニ・チャーム株式会社 吸収性物品
JP7178172B2 (ja) 2017-12-28 2022-11-25 ユニ・チャーム株式会社 吸収性物品
TWI813613B (zh) * 2017-12-28 2023-09-01 日商優你 嬌美股份有限公司 吸收性物品
WO2020130959A1 (fr) * 2018-12-20 2020-06-25 Evyap Sabun Yag Gliserin Sanayi Ve Ticaret Anonim Sirketi Couche centrale absorbante optimisée pour produits d'hygiène

Also Published As

Publication number Publication date
CN103957858B (zh) 2016-03-02
JP2013111419A (ja) 2013-06-10
CN103957858A (zh) 2014-07-30
TW201334764A (zh) 2013-09-01
TWI568428B (zh) 2017-02-01
JP5769604B2 (ja) 2015-08-26

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