WO2013099624A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2013099624A1
WO2013099624A1 PCT/JP2012/082341 JP2012082341W WO2013099624A1 WO 2013099624 A1 WO2013099624 A1 WO 2013099624A1 JP 2012082341 W JP2012082341 W JP 2012082341W WO 2013099624 A1 WO2013099624 A1 WO 2013099624A1
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WO
WIPO (PCT)
Prior art keywords
protrusion
basis weight
absorbent
absorbent article
sheet
Prior art date
Application number
PCT/JP2012/082341
Other languages
English (en)
Japanese (ja)
Inventor
京子 石橋
宏子 川口
泰樹 内山
長原　進介
玲子 大西
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to RU2014131016/12A priority Critical patent/RU2550484C1/ru
Priority to CN201280058565.4A priority patent/CN103957857B/zh
Publication of WO2013099624A1 publication Critical patent/WO2013099624A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • 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
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A61F13/51108—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction
    • 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
    • A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53708—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
    • A61F13/53713—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction

Definitions

  • the present invention relates to an absorbent article.
  • Absorbent articles such as sanitary napkins, panty liners, and disposable diapers are usually applied directly to the wearer's skin. In this case, it is often used in a place where rough skin is likely to be worn, and it may be worn for a long time. Therefore, a gentle touch per skin is desired. On the other hand, this type of absorbent article is required to have liquid absorbency and liquid retention as basic functions.
  • a conventional absorptive article there exists a thing of composition which has arranged flat surface sheet 1 on absorber 3 as shown in FIG.
  • Patent Document 1 discloses a surface sheet having a large number of convex portions that are formed of an upper layer sheet and a lower layer sheet and have a hollow inside.
  • the bottom surface of the convex portion has a rectangular shape
  • the convex portion has a rectangular parallelepiped shape or a truncated pyramid shape as a whole.
  • Patent Document 2 a part or all of the surface is formed by alternately combining multiple rows of ridges and groove portions, the ridge portions are curved in a convex shape, and the groove portions are curved in a concave shape.
  • a surface sheet is disclosed in which a large number of apertures are arranged at intervals.
  • the peripheral part of the opening part it has a three-dimensional rib which stands up from the surface of this surface sheet toward the back surface.
  • the first fiber layer disposed on the skin side and the second fiber layer disposed on the absorber side are laminated and partially joined at a joint portion of a predetermined pattern.
  • the surface sheet for absorbent articles in which portions other than the joint portion are convex on the skin side is disclosed.
  • JP 2004-174234 A Japanese Patent Laid-Open No. 09-299402 JP 2004-000466 A
  • the present invention has a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the both sheets,
  • the top sheet protrudes on the first surface side on the liquid supply side and has an internal space; and a second protrusion portion protrudes on the second surface side opposite to the first surface side and has an internal space;
  • the first and second protrusions are alternately and continuously arranged in different directions intersecting in plan view over the entire surface sheet, and the top of the second protrusion and the opening thereof
  • a wall portion having an annular structure in between, and the wall portion has fiber orientation in a direction connecting the top portion of the second projecting portion and the opening,
  • the absorbent body has a first basis weight part and a second basis weight part having a lower basis weight and surrounding the first basis weight part, and is in contact with the top of the second protrusion of the topsheet.
  • At least a part of the first and second projecting portions adjacent to each other and the concave portion provide an absorbent article that is disposed at a position facing each other via the second basis weight portion.
  • the present invention relates to an absorbent article having improved liquid permeability of a surface sheet having irregularities and improved liquid diffusibility in an absorbent body.
  • FIGS. 1 to 5 A preferred embodiment of the absorbent article according to the present invention will be described below with reference to FIGS. 1 to 5. Each component will be described with reference numerals.
  • the absorbent article of the present invention has a basic structure described below. That is, a liquid-permeable top sheet 1 disposed on the skin contact surface side, a liquid-impermeable back sheet 2 disposed on the non-skin contact surface side, and between the top sheet 1 and the back sheet 2 And an absorbent main body 4 having an absorbent body (also referred to as an absorbent core) 3 having liquid retention properties interposed therebetween.
  • the said absorptive main body 4 can use the material normally used for this kind of diaper etc., It does not specifically limit.
  • the top sheet 1 is preferably formed of a liquid permeable nonwoven fabric.
  • the liquid-permeable nonwoven fabric is a nonwoven fabric called air-through nonwoven fabric, point-bonded nonwoven fabric, spunbonded nonwoven fabric, spunlace nonwoven fabric, and three-dimensionally shaped nonwoven fabric.
  • a fiber that has been subjected to a hydrophilic treatment with a composite fiber of polyethylene terephthalate and polyethylene can be preferably used.
  • the back sheet 2 is not particularly limited as long as it is waterproof and moisture permeable.
  • a film is formed by melt-kneading a hydrophobic thermoplastic resin, a fine inorganic filler made of calcium carbonate or the like or an incompatible organic polymer, and the film is obtained by uniaxial or biaxial stretching.
  • a porous film is mentioned.
  • the thermoplastic resin include polyolefin.
  • the polyolefin include high-density to low-density polyethylene, linear low-density polyethylene, polypropylene, polybutene, and the like, and these can be used alone or in combination.
  • the absorbent body 3 for example, a fiber aggregate or a combination of this and an absorbent polymer can be used.
  • the fibers constituting the fiber assembly hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used.
  • the basis weight is not particularly limited, but is preferably 150 g / m 2 or more 500 g / m 2 or less.
  • covers the absorber 3 can also be used.
  • This coated sheet includes thin paper (thin paper) such as hydrophilic tissue paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and non-woven fabric (spunbond-meltblown) obtained by subjecting synthetic resin fibers to hydrophilic treatment. Spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown-spunbond (SSMS), etc.) can be used.
  • the top sheet 1 covers the entire surface of the first projecting portion 11 that projects to the first surface (front surface) side Z1 on the liquid supply side and the second surface (back surface) side Z2 opposite to the first surface side Z1.
  • the projecting second projecting portions 12 are arranged at a predetermined interval. Details of the planar arrangement example of the first and second protrusions 11 and 12 will be described later. It is preferable that the first surface side Z1 is directed to the skin surface side of the wearer, and the second surface side Z2 is disposed on the absorber 3 side inside the absorbent article. Hereinafter, description will be given in consideration of an embodiment in which the first surface side Z1 is used toward the skin surface of the wearer.
  • a wall portion 13 exists between the top portion 12T of the second projecting portion 12 (hereinafter also referred to as the second top portion 12T) and the opening portion 12H.
  • the wall portion 13 forms an annular structure at the second projecting portion 12.
  • the fibers constituting the wall portion 13 have fiber orientation mainly in the direction connecting the second top portion 12T and the edge of the opening 12H (the direction of the double arrow shown in FIG. 1). In other words, it has a radial fiber orientation from the second top portion 12T toward the outside. Therefore, the fibers are oriented so as to converge toward the second top portion 12T along the surface direction of the sheet surface from the wall portion 13 to the second projecting portion 12.
  • the first and second projecting portions 11 and 12 have excellent liquid permeability, are not easily crushed, and can be easily recovered even when deformation occurs.
  • the wall portion 13 has less fiber than the top portion 11T of the first protruding portion 1 (hereinafter also referred to as the first top portion 11T) and the top portion 12T of the second protruding portion 12. Furthermore, the density of the first and second top portions 11T and 12T is higher than that of the wall portion 13.
  • the fiber amount of the surface sheet 1 formed with unevenness in the present invention is difficult to specify because the change in the minute region is large, and the fiber amount of the wall portion 13 and the first and second top portions 11T and 12T is the distance between the fibers.
  • relative size can be inferred. Specifically, since the proportion of fibers decreases as the interfiber distance increases, the amount of fibers decreases compared to a structure with a short interfiber distance.
  • the distance between fibers can be compared by comparing the volume of a cylinder in which a circular cavity surrounded by fibers expands in the thickness direction, and the distance between fibers is the diameter. It can be estimated that the density is lower as the volume of one cylindrical body having a higher thickness is larger.
  • the inter-fiber distance in the wall portion 13 affects the ease of permeation of the surface sheet liquid when absorbing a large amount, and the inter-fiber distance and thickness of the wall portion 13 affect the structural stability. Yes.
  • the preferable range of the distance between fibers and thickness is mentioned later.
  • the first and second apexes 11T and 12T are rounded truncated cones or hemispheres. More specifically, the protruding shape of the first protruding portion 11 is closer to a hemisphere than a sharp tip, while the protruding shape of the second protruding portion 12 is sharper and forms a cone or truncated cone with a rounded top. ing.
  • the shape of the 1st, 2nd protrusion parts 11 and 12 is not limited to the said shape, What kind of protrusion form may be sufficient. For example, various cone shapes can be employed.
  • the cone shape in this specification includes a wide range of cones, truncated cones, pyramids, truncated pyramids, oblique cones, and the like.
  • the first and second projecting portions 11 and 12 have circular truncated cones or hemispherical internal spaces 11S and 12S similar to the outer shape thereof.
  • the internal spaces 11S and 12S are separated from each other via a ridge portion 14 connecting the first top portions 11T of the adjacent first protrusions 11 and form a non-continuous space.
  • the wall portion 13 is formed between the top portions 11T and 12T of the first and second projecting portions 11 and 12 and the respective opening portions 11H and 12H. It has a sheet structure in which the first and second projecting portions 11 and 12 are continuous via the ridge portion 14.
  • the apparent thickness of the entire surface sheet 1 (from the first top portion 11T to the second top portion 12T) in the present invention (hereinafter referred to as the sheet apparent thickness t10) is not particularly limited, but a good cushion feeling for the absorbent article. From the viewpoint of providing a thickness of 1.0 mm or more and 9.0 mm or less, preferably 1.5 mm or more and 7.0 mm or less, and more preferably 2.0 mm or more and 6.0 mm or less.
  • the apparent thickness of the first protrusion 11 between the lowest position of the ridge 14 from the first top 11T (apparent thickness t11 of the first top 11T) is 0.1 mm or more from the viewpoint of achieving both cushioning properties and smoothness.
  • cup height Hc The apparent thickness (hereinafter cup height Hc) of the portion 12 is 0.5 mm or more and 8.0 mm or less, preferably 0.7 mm or more and 7.0 mm or less, more preferably 1.0 mm or more and 5.0 mm or less.
  • the thickness of the surface sheet at each of the first top portion 11T, the second top portion 12T, and the wall portion 13 is such that the wall portion 13 is thinner than the first top portion 11T and the second top portion 12T, and the thickness t111 of the first top portion 11T.
  • the thickness t131 of the region 1/3 from the skin side surface is 0.1 mm to 0.7 mm and the point of 2/3 from the skin side surface.
  • the thickness t132 is 0.5 mm to 1.0 mm.
  • the thickness t121 of the second top portion 12T is less affected at the time of transferring the large amount of liquid.
  • the cup does not collapse under pressure. That is, from the viewpoint of maintaining the shape, the thickness (thickness t132) of the lower portion of the cup of the wall portion 13 (here, the point ⁇ from the top portion 12T of the second protruding portion 12 of the apparent thickness (cup height Hc)) is within the above range. Therefore, a fiber structure necessary for shape retention is formed. Further, the first apex portion 11T and the wall portion 13 are different in fiber orientation and the size of the gap between fibers (interfiber distance) when viewed in plan.
  • the fiber orientation measured by the method described later is measured so that the MD direction of the topsheet 1 is at an angle of 0 ° during orientation measurement for the first top portion 11T.
  • the orientation angle in the wall portion 13 adjacent to the direction perpendicular to the MD orientation in the first top portion 11T is 90 in the provisional line direction connecting the first top portion 11T and the second top portion 12T.
  • the orientation angle in the wall portion 13 is along the provisional line direction connecting the first top portion 11T and the second top portion 12T when 0 ° or more and 360 ° or less are corrected (converted) to an angle range of 0 ° or more and 180 °.
  • N (within about ⁇ 30 ° in the direction of the temporary line)
  • the fiber has an orientation angle.
  • the measurement of the orientation in the wall portion 13 is easier to observe the change in the fiber orientation if the direction away from the MD direction is measured than the part of the top sheet 1 that is continuous in the MD direction. Therefore, when the wall portion 13 adjacent to the first top portion 11T is arranged as shown in FIG. 3, the intersection angle between the temporary line connecting the first top portion 11T and the second top portion 12T and the MD direction is 90 ° ⁇ . Fiber orientation, which will be described later, is measured so that the direction of the provisional line connecting the first top portion 11T and the second top portion 12T is 90 °, targeting the one in the 45 ° direction.
  • the orientation strength of the wall portion 13 is as high as 1.05 or more.
  • the orientation strength of the first top portion 11T is not particularly limited, but is more preferably lower than the wall portion 13. Since the orientation angles are different between the top portions 11T and 12T and the wall portion 13 at the adjacent positions described above, the fibers are oriented so as to converge on the second top portion 12T side at the wall portion 13. Moreover, when the orientation strength of the wall portion 13 is high, a large amount of liquid is excreted, and when the fibers of the wall portion 13 contain water, the distance between the fibers opens, and the liquid can be delivered to the absorber 3 at a stretch. .
  • the average interfiber distance in the first top portion 11T is preferably 1 ⁇ m or more and 40 ⁇ m or less, and more preferably 5 ⁇ m or more and 30 ⁇ m or less from the viewpoint of smoothness.
  • the average inter-fiber distance in the wall portion 13 is preferably greater than or equal to 10 ⁇ m and less than or equal to 100 ⁇ m, more preferably greater than or equal to 15 ⁇ m and less than or equal to 80 ⁇ m, from the viewpoint of allowing the liquid to pass.
  • the number ratio of the inter-fiber distance of 40 ⁇ m or more is preferably 5% or more and 50% or less. Preferably they are 5% or more and 30% or less.
  • the fiber orientation in the 1st protrusion part 11 and the 2nd protrusion part 12 arranges in the longitudinal direction of a nonwoven fabric, when manufacturing by web formation by a general card method, and nonwoven fabric formation by manufacturing methods, such as an air-through.
  • the fiber has such an orientation angle, and the orientation strength can range from 1 to 1.7 depending on the purpose. That is, when the fiber orientation is strong (orientation strength is high), the fiber array vector is oriented in the orientation angle direction. That is, since more fibers are oriented in the orientation angle direction, the behavior during processing is easily stabilized. Conversely, when the fiber orientation strength is low, the fiber direction is dispersed. Generally, the strength ratio in the longitudinal direction and the width direction approaches 1, and the strength can be balanced.
  • the nonwoven fabric tends to have random orientation while being arranged in the longitudinal direction, and has an orientation angle of about 0 ° ⁇ 50 ° with respect to the longitudinal direction.
  • the wall 13 of the surface sheet 1 in the present invention is not related to the fiber orientation angle of the first and second protrusions 11 and 12, or the fiber orientation angle of the first and second protrusions 11 and 12. From the above, the angle is greatly changed, and the orientation in the direction of the second projecting portion 12 is exerted.
  • the first arrangement example includes the first and second projecting portions 11 and 12 over the entire surface sheet 1 as different directions intersecting in plan view over the entire surface sheet 1. They are alternately and continuously arranged in the direction X and the second direction Y, respectively.
  • the crossing angle between the first direction X and the second direction Y is preferably 30 ° to 90 ° (orthogonal), and the illustrated example is 90 °.
  • the ridge 14 is formed between the adjacent first protrusions 11.
  • the arrangement form of the first and second protrusions 11 and 12 is not limited to the configuration shown in FIG.
  • six first protrusions 11 are arranged at the apexes of a hexagon around the second protrusion 12, and the pattern configuration is arranged in the entire area of the surface sheet 1. May be.
  • the first protrusions 11 are adjacent to each other.
  • Such an arrangement is also arranged alternately and continuously in each of the first direction X, the second direction Y, and the third direction W as different directions intersecting in plan view. It is included in the meaning that the second protrusions 12 are arranged “alternately”.
  • the topsheet 1 having the first and second projecting portions 11 and 12 arranged as described above does not have a bent portion, and is composed of a continuous curved surface as a whole.
  • the said surface sheet 1 has the structure continuous in the surface direction.
  • This “continuous” means that there are no intermittent portions or small holes.
  • fine holes such as gaps between fibers are not included in the small holes.
  • the small hole can be defined, for example, as a hole having a diameter equivalent to a circle of 1 mm or more.
  • the absorbent body 3 includes a continuous second basis weight portion 32 and a first basis weight portion 31 having a higher basis weight than that, and the first basis weight portion 31 is surrounded by the second basis weight portion 32. Yes. Moreover, it has the groove-shaped recessed part 33 extended in the at least longitudinal direction which is dented from the back surface sheet 2 side to the surface sheet 1 side, and makes the 2nd basic weight part 32 into a bottom face.
  • the concave portion 33 is disposed on the back sheet 2 side opposite to the top sheet 1 side of the absorber 3, and the adjacent first and second projecting portions 11 and 12 and the concave portion 33 form the absorber 3. Are arranged at positions facing each other.
  • the second basis weight portion 32 is disposed so as to surround the first basis weight portion 31, and a groove-shaped recess 33 is disposed on the back sheet side of the second basis weight portion 32 between the first basis weight portions 31. . Therefore, the absorbent body 3 is configured such that the first basis weight portion 31 is thicker than the second basis weight portion 32. And the surface of the absorber 3 on the top sheet 1 side (the upper side in the drawing) is substantially flat. Further, the first basis weight portion 31 has a higher density than the second basis weight portion 32. The preferred range of the density is not particularly limited, but the first basis weight portion 31 is 0.03 g / cm 3 or more and 0.50 g / cm 3 or less, more preferably 0.05 g / cm 3 or more and 0.40 g / cm.
  • the second basis weight portion 32 is 0.01 g / cm 3 or more and 0.15 g / cm 3 or less, more preferably 0. .03g / cm less than 3 0.12 g / cm 3 or less.
  • the recessed part 33 is distribute
  • FIG. It transfers to the internal space 11S of the 1st protrusion part 11, and is absorbed by the absorber 3 from the surface sheet 1 side.
  • it is guide
  • the liquid once led to the second basis weight portion 32 is absorbed in a certain amount there, and the portion that cannot be absorbed further moves to the recess 33.
  • the concave portion 33 is disposed on the surface sheet 1 side, the liquid moves directly to the concave portion, and the liquid that does not enter the concave portion overflows and causes leakage. Therefore, it is desirable that the concave portion 33 is disposed on the side opposite to the top sheet 1.
  • the surface of the absorber 3 on the surface sheet 1 side is flat, and thus the second top portion 12T and the absorber 3 are formed even if the surface sheet 1 has irregularities due to the first and second protrusions 11 and 12. Since contact can be ensured, the adhesiveness to the top sheet 1 by a hot melt adhesive (not shown) is improved. Since this hot melt adhesive is applied in a spiral shape, for example, so as to provide a coating surface with a gap, the liquid transfer from the second protruding portion 12 to the absorber 3 is inhibited by the adhesive. Absent.
  • the integrity of the topsheet 1 and the absorbent body 3 is maintained and the followability is improved, and the strength of adhesion to the second projecting portion 12 is reduced. Since it is partially disposed, the softness of the absorbent article can be maintained.
  • adhesiveness can be evaluated by peel strength between sheets, and the peel strength is preferably 0.1 cN or more and 50 cN or less, and more preferably 0.5 cN or more and 10 cN or less.
  • the peel strength is lower than 0.1 cN, it is difficult for the liquid to move from the topsheet 1 to the absorber 3 when absorbing a small amount, and if the peel strength is higher than 50 cN, the apparent thickness of the topsheet 1 tends to decrease and absorbs a large amount. The effect of time becomes difficult to play.
  • the 1st basic weight part 31 is a high density compared with the 2nd basic weight part 32, there exists a transfer of the liquid from the 2nd basic weight part 32 to the 1st basic weight part 31, There is little transfer of the liquid from the basic weight part 31 to the 2nd basic weight part 32. FIG. Therefore, the liquid absorbed in the first basis weight portion 31 is difficult to return. That is, the liquid retention is increased.
  • the first and second groove-shaped recesses 33 extending at least in the longitudinal direction are provided on the back surface side of the absorbent body 3 opposite to the surface sheet 1 (see FIG. 1) side.
  • the third recesses 33A, 33B, and 33C are provided.
  • the absorber 3 is composed of three parts in the longitudinal direction L thereof. 1st absorption part 3A divided into the middle part, 2nd absorption part 3B arranged on one side of this 1st absorption part 3A, and 3rd absorption part 3C arranged on the other side of 1st absorption part 3A And have. Accordingly, the first absorption part 3A is arranged between the second absorption part 3B and the third absorption part 3C.
  • the outer shape of the absorbent body 3 may be a rectangle, but more preferably, the width direction D (hereinafter referred to as the width direction D is the above) so as to fit the thigh portion of the wearer's thigh.
  • the 1st, 2nd, 3rd absorption part 3A, 3B, 3C only displayed the area
  • the first absorbent part 3A is arranged on the crotch part, for example, the second absorbent part 3B is arranged on the ventral side, and the third absorbent Part 3C is arranged on the back side.
  • the 2nd absorption part 3B is arranged on the back side
  • the 3rd absorption part 3C is arranged on the ventral side.
  • a plurality of (two in the illustrated example) first recesses 33A are mainly arranged in the first absorption portion 3A, and each first recess 33A is mainly located inside the side periphery of the first absorption portion 3A in plan view. It is arranged in the longitudinal direction L.
  • “a plurality of first recesses 33A are mainly arranged in the first absorption portion 3A” means that in addition to the case where only the first recesses 33A are arranged in the first absorption portion 3A, the second recesses It means that the case where 33B and the 3rd recessed part 33C are partially arranged is included.
  • mainly arranged in the longitudinal direction L means that not only the arrangement in only the longitudinal direction L but also the arrangement in a part of other directions is included.
  • the second and third recesses 33B and 33C are mainly arranged in each of the second and third absorption portions 3B and 3C, and each of the second and third recesses 33B and 33C is mainly in the longitudinal direction L. It is arranged in an oblique direction.
  • the second and third recesses 33B and 33C are mainly arranged in each of the second and third absorbers 3B and 3C” means that only the second and third recesses 33B and 33C are arranged.
  • the 1st recessed part 33A is partially arranged. “Mainly arranged in an oblique direction” means that it may be partially arranged in other directions, and as a specific example of the oblique direction, it is arranged in an oblique lattice shape. Therefore, the first recess 33A and the second and third recesses 33B, 33C are different in the arrangement of the recesses.
  • a part of the first recess 33A may be disposed on a part of the second and third absorption parts 3B and 3C.
  • a part of the second recessed part 33B is arranged in a part of the first absorbing part 3A, or the first recessed part 33A Is partly disposed in a part of the second absorber 3B.
  • the third absorber 3C the arrangement relationship of the recesses with respect to each absorbing portion varies depending on the set position of the boundary between the first absorbing portion 3A and the second and third absorbing portions 3B, 3C.
  • first and second recesses 33A and 33B and the first and third recesses 33A and 33C are formed as continuous recesses.
  • the cross-sectional shape of the first recess 33A to the third recess 33C is not limited, but has a rectangular shape or an inverted trapezoidal shape.
  • the absorber 3 is comprised with aggregates, such as a fiber like a nonwoven fabric, the outline of the cross-sectional shape of each recessed part is not decided, but is an approximate shape.
  • the absorbent body 3 has a plurality of absorbent bodies 3 (four in the illustrated example) in the first absorbent portion 3A in the absorbent body 3 having the arrangement shown in FIG. 5 (1).
  • the first concave portion 33A is mainly arranged, and the fourth concave portion 33h connected to the first concave portion 33A arranged in the longitudinal direction L is arranged in the width direction D of the first absorbing portion 3A. Therefore, the recesses are arranged in a so-called ladder lattice by the first recesses 33A and the fourth recesses 33h.
  • Other components are the same as those of the absorbent body 3 shown in FIG.
  • the liquid transfer quickly proceeds to the outer concave portion, and the liquid transfer can be performed in a wider range. Therefore, the amount of liquid absorption increases and the time until absorption is shortened.
  • 33A and 33h belonging to the first absorption portion 3A may be arranged in a ladder shape (the first basis weight portion 31 is staggered) or arranged in a lattice shape (the first basis weight portion 31 is a grid shape). You may do it.
  • the second recesses 33B and the third recesses 33C belonging to the second absorber 3B and the third absorber 3C may be omitted or may be intermittent (discontinuous). Further, it may be parallel or perpendicular to the longitudinal direction L.
  • each of the plurality of first recesses 33A, second recesses 33B, and third recesses 33C belonging to the first absorption unit 3A may have the same width or different widths.
  • the effects of the absorbent article of the present invention will be described below by taking the above preferred embodiment as an example.
  • the liquid movement when the liquid is supplied onto the top sheet 1 will be described with reference to FIG.
  • the liquid 51 travels along the wall surface of the internal space 12 ⁇ / b> S of the second protrusion 12 and from the top 12 ⁇ / b> T of the second protrusion 12. It is assumed that the liquid 51 moves to the absorber 3 side and the liquid 51 moves from the second basis weight part 32 having a low basis weight of the absorber 3 to the first basis weight part 31 having a high basis weight.
  • the accumulated liquid 51 is between the fibers that are oriented in the direction connecting the top portion 12T and the opening portion 12H from the inside space 12S of the second projecting portion 12 by the fluid pressure. It can flow into the internal space 11S in the 1st protrusion part 11 instantly.
  • the amount of fibers in the wall portion 13 is smaller than that of the top portions 11T and 12T, it is considered that when the wall portion 13 is subjected to such a hydraulic pressure that the liquid 51 is accumulated in the second projecting portion 12, the space between the fibers is likely to expand. .
  • the recess 33 Since the recess 33 has the liquid-impermeable back sheet 2 on the opening side (the lower side in the drawing), even if the opening side of the recess 33 faces downward, the liquid 51 is accumulated in the recess 33 without leaking, It is diffused over a wide range of the absorber 3 through the recess 33.
  • the adjacent first and second projecting portions 11 and 12 and the concave portion 33 are disposed at positions facing each other via the absorber 3, so that the interior of the first projecting portion 11
  • the liquid 51 that has moved to the space 11 ⁇ / b> S easily passes through the second basis weight portion 32 of the absorber 3 and moves to the recess 33. That is, since the pitch between the first and second projecting portions 11 and 12 (between the first and second top portions 11T and 12T) is narrower than the concave portion 33 of the absorbent body 3, the first and second The second protrusions 11 and 12 are necessarily arranged. As a result, the liquid supplied to the inside of the first protrusion 11 can be quickly transferred to the recess 33. Then, the liquid 51 (excess liquid 52) transferred to the concave portion 33 is diffused in the wide range of the absorber 3 through the concave portion 33 and is absorbed by the absorber 3.
  • the liquid 51 accumulates directly in the lower concave portion 33 from the second basis weight portion 32 having a low basis weight as the liquid 51 moves as described above. Is expected to migrate.
  • the 2nd basic weight part 32 may dent to the recessed part 33 side with a hydraulic pressure.
  • the liquid 51 accumulated in the concave portion 33 is diffused in the wide range of the absorber 3 through the concave portion 33 and absorbed by the absorber 3.
  • the liquid 51 supplied onto the top sheet 1 quickly moves from the internal space 11S to the absorber 3 through the top sheet 1, and is diffused and absorbed.
  • the transfer of the liquid 51 on the top sheet 1 is suppressed, side leakage can be prevented.
  • the liquid 51 enters the internal space 11S in the first protrusion 11 that becomes the second surface (back surface) side Z2 of the topsheet 1 from the second protrusion 12. Since the transition proceeds quickly, it becomes difficult for the liquid to remain on the first surface (front surface) side Z1 of the topsheet 1, so that the feeling of stickiness of the skin can be reduced.
  • the density of the top portion 12T of the second protrusion 12 is higher than that of the wall portion 13, when the liquid 51 is supplied in a large amount, it is difficult to leak from the top 12T. It becomes easy to temporarily store the liquid 51 in the space 11S.
  • the density of the top part 12T is higher than the wall part 13, there also exists an advantage that the top parts 11T and 12T are hard to be crushed.
  • the height direction of the pant-type wearing article is defined as the Y direction
  • the width direction of the pant-type wearing article is defined as the X direction, which is also referred to as a “waist circumference direction”.
  • the pant-type wearing article of the present embodiment is, for example, a pant-type diaper 100, and includes an abdominal side part 121 arranged on the wearer's belly side, and a crotch part 113 arranged on the crotch part. And a dorsal side portion 123 disposed on the dorsal side.
  • the pants-type diaper 100 includes an exterior body 111 that forms an abdominal side portion 121 and a back side portion 123, and the absorbent main body 4 that forms a crotch portion 113.
  • one side edge portion 121 ⁇ / b> A of the ventral side portion 121 and one side edge portion 123 ⁇ / b> A of the back side portion 123 are joined, and the other side edge portion 121 ⁇ / b> B and back side portion 123 of the ventral side portion 121 are joined.
  • the one side edge portion 123B is joined to form an annular shape.
  • the crotch part 113 is comprised by the absorptive main body 4 which bridge
  • the absorbent main body 4 has a pant-type structure that spans an annular outer body 111 and a crotch part 113.
  • the absorbent main body 4 forms a crotch portion, and extends to the vicinity of the lower portion of the waist opening 112 of the exterior body 111 at the abdominal side portion 121 and the back side portion 123 and is fixed to the exterior body 111.
  • the exterior body 111 has the center area
  • the “waist circumference region” is a region between the position where the vicinity of the outer base of the thigh is arranged in the body length direction (Y direction) that is the direction from the upper edge of the waist opening 112 to the lower part thereof.
  • the exterior body 111 is configured by laminating an inner layer material 131 and an outer layer material 133, and a one-layer region where one layer of the inner layer material 131 exists is spaced in the height direction (Y direction) of the exterior body 111. Have more than one.
  • the inner layer material 131 is present in one layer region, and the outer layer material 133 is stacked on the inner layer material 131 at intervals in the height direction of the exterior body 111.
  • the laminated region where the inner layer material 131 and the outer layer material 133 are laminated has elasticity in the width direction (X direction) of the pant-type diaper 100.
  • the laminated region may include an elastic body 135 between the inner layer material 131 and the outer layer material 133.
  • the elastic body 135 is sandwiched between the inner layer material 131 and the outer layer material 133 in an expanded state, and thereby has elasticity.
  • both or one of the inner layer material 131 and the outer layer material 133 may be made of a stretchable material.
  • the inner layer material 131 and the outer layer material 133 for example, non-woven fabrics, woven fabrics, knitted fabrics, resin films by various production methods such as air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric, respectively.
  • a sheet material obtained by stacking and integrating these can also be used.
  • the inner layer 131 is preferably formed from a nonwoven fabric from the viewpoint of improving air permeability and texture, and is formed of a water-repellent nonwoven fabric from the viewpoint of preventing excrement leakage. Is preferred.
  • the pant-type diaper 100 uses the absorbent main body 4 of the absorbent article of the present invention for the crotch part 113, so that liquid leakage can be prevented and the feeling of skin stickiness can be reduced.
  • the present invention further discloses the following absorbent article and pants-type wearing article.
  • the top sheet protrudes on the first surface side on the liquid supply side and has an internal space; and a second protrusion portion protrudes on the second surface side opposite to the first surface side and has an internal space;
  • the first and second protrusions are alternately and continuously arranged in different directions intersecting in plan view over the entire surface sheet, and the top of the second protrusion and the opening thereof
  • a wall portion having an annular structure in between, and the wall portion has fiber orientation in a direction connecting the top portion of the second projecting portion and the opening
  • the absorbent body has a first basis weight part and a second basis weight part having a lower basis weight and surrounding the first basis weight part, and is in contact with the top of the second protrusion of the topsheet.
  • the absorbent article in which at least a part of the adjacent first and second protruding portions and the concave portion are arranged at positions facing each other through the second basis weight portion.
  • the fibers are oriented so as to converge toward the top of the second protrusion along the surface direction of the surface sheet surface from the wall portion to the second protrusion ⁇ 1> or ⁇ 2> Absorbent article as described in 1.
  • the first and second protrusions each have a circular truncated cone or hemispheric internal space similar to the outer shape thereof, and any one of ⁇ 1> to ⁇ 3> Absorbent article.
  • ⁇ 5> Any one of ⁇ 1> to ⁇ 4>, wherein the internal space is separated via a ridge connecting the first tops of the adjacent first protrusions and forms a non-continuous space.
  • ⁇ 6> The absorbent article according to any one of ⁇ 1> to ⁇ 5>, wherein the surface of the absorbent body on the topsheet side is a flat surface.
  • ⁇ 7> The absorbent article according to any one of ⁇ 1> to ⁇ 6>, wherein the first basis weight part has a higher density than the second basis weight part.
  • ⁇ 8> The absorbent article according to any one of ⁇ 1> to ⁇ 7>, wherein the density of the first basis weight part is 0.03 g / cm 3 or more and 0.50 g / cm 3 or less.
  • ⁇ 9> The absorbent article according to any one of ⁇ 1> to ⁇ 8>, wherein the density of the second basis weight part is 0.01 g / cm 3 or more and 0.15 g / cm 3 or less.
  • ⁇ 10> The absorbent article according to any one of ⁇ 1> to ⁇ 9>, wherein the wall portion has less fiber than the top portions of the first and second protrusions.
  • ⁇ 11> The absorbent article according to any one of ⁇ 1> to ⁇ 10>, wherein the top portions of the first and second protrusions have a higher density than the wall portion.
  • ⁇ 12> The top sheet of the first protrusion, the top of the second protrusion, and the thickness of the topsheet at each part of the wall are compared to the top of the first protrusion and the top of the second protrusion.
  • the thickness of the top part of the first protrusion is 0.5 mm or more and 2.0 mm or less, and the wall part has a thickness of 1/3 of the skin side surface of 0.1 mm or more and 0.7 mm or less.
  • ⁇ 15> The absorbent article according to any one of ⁇ 1> to ⁇ 14>, wherein an average inter-fiber distance at the top of the first protrusion is not less than 1 ⁇ m and not more than 40 ⁇ m.
  • ⁇ 16> The absorbent article according to any one of ⁇ 1> to ⁇ 15>, wherein an average inter-fiber distance in the wall portion is 10 ⁇ m or more and 100 ⁇ m or less.
  • ⁇ 17> The absorbent article according to any one of ⁇ 1> to ⁇ 16>, wherein the top of the second protrusion and the absorber are fixed by a hot melt material.
  • the absorber includes three parts in the longitudinal direction, and a plurality of first recesses are arranged in the first absorption part divided into intermediate parts, and each first recess is viewed in plan view.
  • the absorbent article according to any one of ⁇ 1> to ⁇ 17>, which is located on the inner side of the side periphery of one absorbent portion and is mainly arranged in the longitudinal direction.
  • the absorbent body includes three parts in the longitudinal direction, a first absorbent part divided into an intermediate part, a second absorbent part disposed on one side of the first absorbent part, and a first absorbent.
  • ⁇ 20> It has an abdominal side part arranged on the abdomen side of the wearer, a crotch part arranged on the crotch part, and a back side part arranged on the back side, and a side edge part and a back part of the abdominal side part
  • a pants-type wearing article formed by joining a side edge of a side part into a pant-type, wherein the absorbent article according to any one of ⁇ 1> to ⁇ 19> is provided in the crotch part.
  • Pants-type wearing article where is arranged.
  • the pants-type wearing article 100 includes an absorbent main body 4 including a top sheet, a back sheet, and an absorbent body disposed therebetween, and a belt-like body 111 serving as an exterior body 111 extending in the waist direction in the front and rear end regions of the absorbent main body 4.
  • the stretchable sheet is fixed, and the belt-like stretchable sheet is partially joined by a heat seal method or an ultrasonic seal method.
  • the details of the pants-type wearing article 100 are as described above.
  • the absorptive main body 4 has a substantially hourglass-shaped external shape having a length of 450 mm, a front end width of 180 mm, a rear end width of 160 mm, and an intermediate portion (a central region that becomes a crotch portion when mounted) having a width of 120 mm.
  • a back sheet is extended to at least the side of the absorbent body 3 shown in FIG. 5, and an elastic material is arranged directly or as a different sheet material in the extended portion so as to express a leakage prevention function.
  • a plurality of thread-like elastic members are arranged in the width direction between the spunbonded nonwoven fabrics as a belt-like stretchable sheet at the front and rear end portions (corresponding to 3B in FIG.
  • the expansion / contraction function can be reduced or lost by the rigidity of the elastic member by cutting or fixing at the fixing portion (overlapping portion) with the absorbent main body 4.
  • Various evaluations to be described later were performed using the absorbent main body in a state where the side elastic function of the absorbent main body was lost by cutting or removal.
  • the top sheet 1 is provided with the first protrusions 11 and the second protrusions 12, and the pitch between the first protrusions 11 and the second protrusions 12 is 4 mm. It was.
  • This topsheet 1 is formed into a concavo-convex nonwoven fabric by an air-through method in which a web is formed into a concavo-convex shape in a web state after the carding step and hot air treatment is performed.
  • the fibers used were Daiwabo NBF (SH) fibers (2.2 dtex ⁇ 51 mm) that had been surface treated with a hydrophilic fiber oil.
  • a polyethylene permeable sheet 18 g / m 2 was used.
  • the absorbent body 3 is the one shown in FIG. 5 (2), and has a pulp having a shape in which a first basis weight portion 31 which is a rectangular high basis weight portion is arranged in a ladder lattice shape and an absorptivity.
  • the polymer is placed in a mixed state, and the spiral hot-melt pressure-sensitive adhesive is sandwiched between two sheets of 16 g / m 2 absorbent paper so as not to overlap each other from the top sheet 1 side and the back sheet 2 side.
  • the one adjusted to the desired thickness was used.
  • the surface sheet 1 and the back surface sheet 2 were integrated with the hot-melt adhesive of this absorber 3, and the sample for evaluation was produced.
  • variety (bottom part) of the recessed part extended in a longitudinal direction) of the 2nd basic weight part 32 which is a low basic weight part was 5 mm in both.
  • Example 2 is the same as Example 1 except that the shape of the absorbent body is a shape in which the second basis weight part 32 that is two low basis weight parts extends in the longitudinal direction shown in FIG. It was prepared.
  • the width of the low basis weight portion is 10 mm in the shape in which the second basis weight portion 32 that is two low basis weight portions extends in the longitudinal direction shown in FIG.
  • Example 4 was made in the same manner as Example 2 except that [Example 4]
  • the shape of the absorber is the shape shown in FIG. 3 for the topsheet used, and the pitch between the first protrusion 11 and the second protrusion 12 (the pitch between the first top 11T and the second top 12T) is 7. It was 5 mm. Other than that was produced like Example 2.
  • FIG. 2 the shape of the absorbent body is a shape in which the second basis weight part 32 that is two low basis weight parts extends in the longitudinal direction shown in FIG. It was prepared.
  • the width of the low basis weight portion is 10 mm in the shape in which the second basis weight portion 32
  • the top sheet 1 is made of Daiwabo-made NBF (SH) fibers (2.2 dtex ⁇ 51 mm) surface-treated with a hydrophilic fiber oil in the same manner as in Example 1, and is produced through a carding step and an air-through step. Air through nonwoven fabric was used.
  • As the back sheet 2 a 18 g / m 2 moisture-permeable sheet made of polyethylene was used.
  • Absorbent body 3 was prepared in the same form and procedure as in Example 1, with a commonly used pulp and absorbent polymer arranged in a mixed state and having a flat (flat) shape without grooves. Thereafter, the top sheet 1 and the back sheet 2 were integrated with the hot melt adhesive of the absorber 3 to prepare a sample for evaluation.
  • Comparative Example 2 In Comparative Example 2, a three-dimensionally-opened nonwoven fabric (groove-shaped openings) disclosed in JP-A-8-302555 was used as the surface sheet 1 for the surface sheet 1 of Comparative Example 1. The aperture width was 53 mm (21 rows of apertures). Other than that was the same as Comparative Example 1.
  • ⁇ Appearance thickness T1 of surface sheet> The three apparent thicknesses T1 in the surface sheet can be measured by observing the cross-sectional state of the portion extending from the first top to the second top. Before cross-sectional observation, using a handy compression tester KES-G5 (trade name) manufactured by Kato Tech Co., Ltd., 5 thicknesses at 0.5 g / cm 2 are measured, and the average value, maximum value, and minimum value are measured. Got the value. A measurement program was used for measurement, and the measurement conditions were set as follows.
  • the top sheet 1 was cut using a single blade (product number FAS-10) manufactured by Feather Safety Razor Co., Ltd. to form a cross section of the top sheet 1. Subsequently, the cut-out cross section is enlarged and observed using a scanning electron microscope (model number JCM-5100) manufactured by JEOL Ltd.
  • the cross section is image data or printed matter, and the assumption line on the mounting surface side is drawn at the apex of the first top portion 11T and the assumption line on the absorber 3 side is drawn at the apex of the second top portion 12T that is parallel to the assumption line.
  • the distance (the length between the hypothetical line and the hypothetical line from the hypothetical line) was measured, and the obtained measurement result was used as the apparent sheet thickness.
  • the ridge portion 14 is specified from the observed enlarged cross section, and the apparent thickness and the cup height Hc of the top portions 11T and 12T are measured. The measurement is performed at three or more locations, and the case where the average value of the apparent sheet thickness is within the minimum value-maximum value obtained from the measurement by KES-G5 is effective.
  • the wall part 13 since it is necessary to measure the curve part and diagonal direction line
  • the average value obtained by measuring the normal direction of the sheet as the sheet thickness is taken as the thickness of the wall portion 13.
  • the position of the height of 1/3 and 2/3 on the surface sheet is specified by connecting the enlarged images so that the first protrusion portion 11 and the second protrusion portion 12 of the surface sheet 1 become one image data.
  • the measurement position can be specified from the whole image of the first protrusion 11 and the second protrusion 12 and the thickness can be specified by the enlarged image.
  • the interfiber distance in the first top portion 11T and the wall portion 13 was measured by enlarging it into a planar image using the scanning electron microscope.
  • the 1st top part 11T it expanded in the normal line direction from the surface sheet 1 side surface, and in the wall part 13, 1/3 position of cup height Hc was expanded from the diagonal surface sheet 1 side direction (normal direction of the wall part 13).
  • the magnification is 50 times or more and 300 times or less
  • the number of measurement by image analysis is 20 or more and 60 or less, preferably 30 or more and 50 or less, in a region surrounded by fibers in a rectangular range. It was adjusted.
  • measurement was performed in an actual measurement range of 700 ⁇ m ⁇ 500 ⁇ m.
  • image analysis an actual measurement of 0.5 mm 2 or less is removed from the number measurement and the inter-fiber distance measurement as a fine inter-fiber structure.
  • Image-Pro plus 6.2 Installation manufactured by Roper Co., Ltd. was used, and a value corresponding to the diameter of the circle was calculated from the area between the individual fibers excluding the fibers, and was defined as the inter-fiber distance.
  • Measurement and calculation were performed for the top portions 11T and 12T and the wall portion 13, and the average value was defined as the average interfiber distance.
  • ⁇ Fiber orientation> The fiber orientation was obtained by enlarging the first top 11 and the wall 13 into a planar image in the same manner as the interfiber distance, and binarizing the image using image processing software NewQuube [trade name] manufactured by Nexus Corporation. Then, using Fiber Orientation Analysis 8.13 Single (software name) which is a fiber orientation analysis program, the orientation angle and orientation strength were measured from the binarized image. The measurement was performed at the same magnification for both the top portion 11 and the wall portion 13, and was performed in the measurement number range close to the measurement of the interfiber distance. In addition, when there are many parts where the outline of the fiber is unclear, the fiber part can be specified by the image analysis.
  • the measurement was performed by the adjacent wall part 13 in the direction (90 degree +/- 45 degree direction) orthogonal to MD direction of the surface sheet 1 in the 1st top part 11T.
  • the measurement of the wall 13 is measured from the perpendicular direction of the wall surface of the top sheet as the vertical direction (orientation angle 90 °) connecting the first top portion 11T and the second top portion 12T, and the first top portion 11T is
  • the MD direction of the topsheet 1 is the vertical direction (orientation angle 0 °).
  • ⁇ Absorber measurement method> The thickness of the produced absorber 3 was measured using a non-contact type laser displacement meter (Laser head LK-G30, displacement meter LK-GD500 (trade name)) manufactured by Keyence Corporation. The measurement pressure was 2.5 g / cm 2 , two or more samples were measured, and the average value was obtained. Moreover, the absorber 3 which has the 1st basic weight part 31 and the 2nd basic weight part 32 is designed from the actual measurement of the width
  • a cylinder having an inner diameter of 35 mm is placed at the center in the longitudinal direction and the center in the width direction of the absorber 3, and the concentration is maintained as a liquid while maintaining the liquid so that the height from the position of the absorber 3 to which the liquid is injected is 10 mm.
  • 40 g of physiological saline colored with 0.005% red No. 2 was injected.
  • the bottom of the cylinder was provided with an acrylic plate (thickness 5 mm, length 250 mm, width 100 mm) with a size that could cover the entire product. The diffusion area of the liquid 10 minutes after the injection was measured.
  • the diffusion area was measured by copying the colored portion of the absorber 3 on an OHP film and performing image analysis using Image-Pro plus 6.2 Installation manufactured by Roper Co., Ltd.
  • a measurement result shows that the utilization efficiency of the absorber 3 is so high that the diffusion area of a liquid is large.
  • ⁇ Measurement method of basis weight> It calculated
  • ⁇ Density measurement method> The density was determined by measuring the basis weight of the part to be measured by the above method and dividing by the thickness measured by the above method.
  • the peel strength was 0.1 cN or more and 50 cN or less, and the adhesiveness was evaluated as A.
  • Table 1 shows the measurement results and evaluation results for each of the above evaluation items.
  • Example 1 ⁇ Effect of Example> As is clear from the evaluation results shown in Table 1, the following results were obtained.
  • the orientation angle of the wall portion was 82 ° or more and 93 ° or less, and both showed fiber orientation in the direction connecting the top of the second protrusion and the opening.
  • the peel strength was in the range of 0.1 cN or more and 50 cN or less, and the adhesiveness between the topsheet and the absorber was Evaluation A. Since Example 1 had a larger liquid diffusion area than Comparative Examples 1 and 2, it was found that the liquid could be absorbed in a wide range of the absorber 3 and the utilization efficiency was high.
  • the presence of the second basis weight portion 32 having a low basis weight in both the longitudinal and width directions in the crotch absorber 3 makes it easy to bend in both directions.
  • the fit to the human body is enhanced.
  • the fit is enhanced even in a state where the amount of pulp and SAP is large and the thickness of the absorber 3 is thick.
  • Example 2 since the liquid diffusion area was larger than those in Comparative Examples 1 and 2, the utilization efficiency of the absorber 3 was further increased.
  • the 2nd basic weight part 32 of the low basic weight of the absorber 3 of a crotch part is only a longitudinal direction and is a wide area, the diffusibility of the liquid in a groove part (concave part 33) increases more. As a result, the utilization efficiency of the absorber 3 is further improved, leading to a reduction in the amount of pulp and superabsorbent polymer (SAP) in the same leakage performance. Moreover, since there is little high basic weight area
  • Example 4 since the apparent thickness of the topsheet 1 is thicker, the space between the absorbent body 3 and the skin is widened and it is difficult to feel stickiness. Therefore, it is considered that the dry feeling is improved by using it in a neutral position. From the above, it is considered suitable for daytime napkins and baby diapers at high ages with active activities.

Abstract

La présente invention concerne un article absorbant, comprenant un voile superficiel, un voile arrière et un corps absorbant intercalé entre ces deux voiles. Ledit voile superficiel comprend, en outre, des premières parties en saillie qui avancent vers une première face située du côté de l'alimentation en liquide et qui comprennent des espaces intérieurs, et des secondes parties en saillie qui avancent vers une seconde face située à l'opposé de la première face avant et qui comportent également des espaces intérieurs. Les premières et secondes parties en saillie sont respectivement disposées en alternance et à proximité immédiate les unes des autres dans diverses directions se croisant selon une vue en plan sur l'intégralité de la surface du voile superficiel, et elles sont dotées de parties de type paroi de structure annulaire entre les pics correspondants aux secondes parties en saillie et les parties d'ouverture de celles-ci. Les parties de type paroi sont caractérisées par une orientation fibreuse dans la direction dans laquelle les pics correspondant aux secondes parties en saillie et leurs ouvertures se rejoignent. Le corps absorbant comprend, en outre, des parties caractérisées par un premier poids de base et des parties caractérisées par un second poids de base, inférieur au premier poids de base, et qui entourent les parties caractérisées par le premier poids de base. Le corps absorbant comporte, en outre, des parties en creux en forme de rainure qui sont en contact avec les pics des secondes parties en saillie du voile superficiel, ce qui forme des concavités allant du côté du voile arrière jusqu'au côté du voile superficiel et qui se prolongent dans au moins le sens longitudinal avec les parties caractérisées par un second poids de base formant leur face inférieure. Au moins certaines des premières et secondes parties en saillie adjacentes et les parties en creux sont situées de façon à se faire mutuellement face avec les parties caractérisées par le second poids de base intercalées entre elles.
PCT/JP2012/082341 2011-12-27 2012-12-13 Article absorbant WO2013099624A1 (fr)

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RU2014131016/12A RU2550484C1 (ru) 2011-12-27 2012-12-13 Впитывающее изделие
CN201280058565.4A CN103957857B (zh) 2011-12-27 2012-12-13 吸收性物品

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JP2011286764A JP5869336B2 (ja) 2011-12-27 2011-12-27 吸収性物品

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015108202A (ja) * 2013-12-03 2015-06-11 花王株式会社 不織布及びそれを有する吸収性物品
US9327473B2 (en) 2012-10-31 2016-05-03 Kimberly-Clark Worldwide, Inc. Fluid-entangled laminate webs having hollow projections and a process and apparatus for making the same
US9474660B2 (en) 2012-10-31 2016-10-25 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US9480608B2 (en) 2012-10-31 2016-11-01 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US9480609B2 (en) 2012-10-31 2016-11-01 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US10070999B2 (en) 2012-10-31 2018-09-11 Kimberly-Clark Worldwide, Inc. Absorbent article
US11007093B2 (en) 2017-03-30 2021-05-18 Kimberly-Clark Worldwide, Inc. Incorporation of apertured area into an absorbent article
US11365495B2 (en) 2017-02-28 2022-06-21 Kimberly-Clark Worldwide, Inc. Process for making fluid-entangled laminate webs with hollow projections and apertures

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5925835B2 (ja) * 2013-09-24 2016-05-25 花王株式会社 不織布の製造方法
JP6214370B2 (ja) * 2013-12-10 2017-10-18 花王株式会社 吸収性物品
JP6233778B2 (ja) * 2013-12-11 2017-11-22 花王株式会社 不織布
JP5829349B1 (ja) * 2015-05-29 2015-12-09 ユニ・チャーム株式会社 吸収性物品用不織布
CN105636565B (zh) * 2015-05-29 2017-09-05 尤妮佳股份有限公司 吸收性物品用无纺布
RU2661845C1 (ru) * 2015-09-29 2018-07-19 Кимберли-Кларк Ворлдвайд, Инк. Впитывающее изделие с выборочно расположенным герметизирующим элементом для талии, имеющим улучшенное уплотнение для талии
JP6704236B2 (ja) * 2015-10-16 2020-06-03 花王株式会社 吸収性物品
JP6758332B2 (ja) 2018-01-10 2020-09-23 ユニ・チャーム株式会社 吸収性物品

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005073921A (ja) * 2003-08-29 2005-03-24 Daio Paper Corp 吸収性物品
JP2009172354A (ja) * 2007-12-28 2009-08-06 Kao Corp 吸収性物品
JP2013017530A (ja) * 2011-07-07 2013-01-31 Kao Corp 吸収性物品

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242632A (en) * 1989-07-18 1993-09-07 Mitsui Petrochemical Industries, Ltd. Nonwoven fabric and a method of manufacturing the same
CN101674793B (zh) * 2007-05-24 2013-10-02 花王株式会社 吸收性物品的正面片材、其制造方法以及吸收性物品
WO2009028236A1 (fr) * 2007-08-28 2009-03-05 Kao Corporation Feuille mise en forme et article absorbant utilisant une telle feuille
JP5199646B2 (ja) * 2007-11-16 2013-05-15 ユニ・チャーム株式会社 吸収性物品
JP5144411B2 (ja) * 2008-07-17 2013-02-13 花王株式会社 不織布
RU2606570C2 (ru) * 2011-07-07 2017-01-10 Као Корпорейшн Поглощающее изделие

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005073921A (ja) * 2003-08-29 2005-03-24 Daio Paper Corp 吸収性物品
JP2009172354A (ja) * 2007-12-28 2009-08-06 Kao Corp 吸収性物品
JP2013017530A (ja) * 2011-07-07 2013-01-31 Kao Corp 吸収性物品

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9327473B2 (en) 2012-10-31 2016-05-03 Kimberly-Clark Worldwide, Inc. Fluid-entangled laminate webs having hollow projections and a process and apparatus for making the same
US9474660B2 (en) 2012-10-31 2016-10-25 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US9480608B2 (en) 2012-10-31 2016-11-01 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US9480609B2 (en) 2012-10-31 2016-11-01 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US10070999B2 (en) 2012-10-31 2018-09-11 Kimberly-Clark Worldwide, Inc. Absorbent article
US10470947B2 (en) 2012-10-31 2019-11-12 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US10478354B2 (en) 2012-10-31 2019-11-19 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections
US11491058B2 (en) 2012-10-31 2022-11-08 Kimberly-Clark Worldwide, Inc. Absorbent article with a fluid entangled body facing material including a plurality of projections
JP2015108202A (ja) * 2013-12-03 2015-06-11 花王株式会社 不織布及びそれを有する吸収性物品
US11365495B2 (en) 2017-02-28 2022-06-21 Kimberly-Clark Worldwide, Inc. Process for making fluid-entangled laminate webs with hollow projections and apertures
US11007093B2 (en) 2017-03-30 2021-05-18 Kimberly-Clark Worldwide, Inc. Incorporation of apertured area into an absorbent article

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JP5869336B2 (ja) 2016-02-24
CN103957857B (zh) 2016-03-02
JP2013132523A (ja) 2013-07-08

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