WO2016060212A1 - Produit absorbant - Google Patents

Produit absorbant Download PDF

Info

Publication number
WO2016060212A1
WO2016060212A1 PCT/JP2015/079226 JP2015079226W WO2016060212A1 WO 2016060212 A1 WO2016060212 A1 WO 2016060212A1 JP 2015079226 W JP2015079226 W JP 2015079226W WO 2016060212 A1 WO2016060212 A1 WO 2016060212A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
absorbent article
sheet
fibers
region
Prior art date
Application number
PCT/JP2015/079226
Other languages
English (en)
Japanese (ja)
Inventor
絵里香 渡邉
加藤　隆弘
石黒　健司
康宏 中野
綾子 牧野
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
Priority claimed from JP2014212404A external-priority patent/JP6440449B2/ja
Priority claimed from JP2015195805A external-priority patent/JP6080323B2/ja
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201580056416.8A priority Critical patent/CN107072831B/zh
Publication of WO2016060212A1 publication Critical patent/WO2016060212A1/fr

Links

Images

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
    • 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
    • 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

Definitions

  • the present invention relates to absorbent articles such as sanitary napkins and disposable diapers.
  • a surface sheet of an absorbent article one having a concavo-convex structure in which streaky ridges and ridges extending in one direction are alternately arranged in the width direction is known.
  • the present applicant has proposed a surface sheet obtained by linearly bonding a sheet for forming irregularities in which a plurality of hook-shaped portions are formed in parallel to each other between the hook-shaped portions (see Patent Document 1). ).
  • Patent Document 2 describes a surface sheet formed of a liquid-permeable fiber nonwoven fabric and shaped into a wave shape.
  • the wave shape is continuously formed in the longitudinal direction of the surface sheet.
  • the corrugated top and bottom extend in a direction intersecting the longitudinal direction of the topsheet.
  • the density of the fibers in the wall region between the corrugated top and bottom regions is lower than the fiber density in the top or bottom region.
  • Patent Document 3 describes a surface sheet having bowl-shaped projections that are continuous in the longitudinal direction of the absorbent article with a predetermined interval in the width direction of the absorbent article.
  • dotted concave embosses are provided alternately at the right side adjacent position and the left side adjacent position with an interval in the longitudinal direction of the absorbent article, and this concave emboss is generally staggered Is arranged.
  • JP 2002-165830 A JP 2008-1113866 A JP 2013-244256 A
  • the present invention provides an absorbent article having a longitudinal direction and a width direction, which includes a liquid-permeable front sheet and a back sheet that form a skin contact surface and an absorbent body interposed between the two sheets. is there.
  • the top sheet is composed of a nonwoven fabric having a concavo-convex structure in which streaky ridges and recesses extending in the longitudinal direction are alternately arranged in the width direction, and is joined to an adjacent lower sheet in the recess. Yes.
  • the non-woven fabric is made of at least a high elongation fiber.
  • the lower sheet is made of an aggregate of thermoplastic resin fibers.
  • the ridge portion has a hollow structure between the nonwoven fabric and the lower sheet.
  • the non-woven fabric has a top region, a bottom region, and a side region located between the top region, the top portion of the convex portion is formed from the top region, and the bottom portion of the concave portion is formed from the bottom region.
  • the fiber density in the side region is lower than both the fiber density in the top region and the fiber density in the bottom region.
  • FIG. 1 is a perspective view showing a panty liner according to an embodiment of the present invention.
  • FIG. 2 is an enlarged sectional view taken along line II-II in FIG.
  • FIG. 3 is a cross-sectional view of an absorber used in the panty liner shown in FIG.
  • FIG. 4 is a partially broken perspective view showing an enlarged main part on the skin facing surface side in the panty liner shown in FIG. 1.
  • FIG. 5 is an enlarged schematic view of the main part in FIG.
  • FIG. 6 is a diagram for explaining a state in which the constituent fibers constituting the nonwoven fabric shown in FIG. 4 are fixed at the heat fusion part.
  • FIG. 7 is a plan view of the skin facing surface of the panty liner shown in FIG. FIG.
  • FIG. 8 is a schematic diagram showing a manufacturing apparatus suitably used for manufacturing the nonwoven fabric shown in FIG. 9 is a cross-sectional view taken along the line IX-IX shown in FIG. 10 (a), 10 (b) and 10 (c) illustrate how a plurality of small diameter portions and large diameter portions are formed in one constituent fiber between adjacent fused portions. It is explanatory drawing to do.
  • FIG. 11 is a perspective view showing an incontinence pad according to another embodiment of the present invention.
  • 12A is an enlarged cross-sectional view taken along the line II-II in FIG. 11, and
  • FIG. 12B is a diagram showing the back surface (surface on the non-skin contact surface side) of the absorbent body of the incontinence pad shown in FIG. is there.
  • FIG. 13 is a partially broken perspective view showing an enlarged main portion of the incontinence pad shown in FIG.
  • FIG. 14 is an enlarged plan view of a part of the skin contact surface of the incontinence pad, showing an example of the arrangement of the joint between the concave portion of the top sheet and the lower sheet.
  • FIG. 15 is a partially enlarged plan view of an absorbent body showing another example of the arrangement of the compression parts that form the high-density part.
  • FIG. 16 is an explanatory diagram of the function and effect of the present invention.
  • FIG. 1 shows a perspective view of a panty liner 10 (hereinafter also simply referred to as “panty liner 10”) according to an embodiment of the present invention.
  • FIG. 2 is an enlarged sectional view taken along line II-II in FIG.
  • the panty liner 10 is interposed between a liquid-permeable top sheet 2 that forms a skin contact surface, a liquid-impermeable back sheet 3, and both the sheets 2 and 3.
  • the absorbent body 4 is provided.
  • Liquid impermeability includes liquid impermeability.
  • the panty liner 10 has a vertically long shape, and has a longitudinal direction X and a width direction Y.
  • the longitudinal direction X coincides with the wearer's front-rear direction when the panty liner 10 is worn, and the width direction Y is a direction orthogonal to the longitudinal direction X in the plan view of the panty liner 10.
  • the panty liner 10 has an oval shape in plan view with a central portion in the longitudinal direction constricted.
  • the surface sheet 2 and the back surface sheet 3 are joined to each other at the peripheral edge 7 of the panty liner 10 at portions extending from the peripheral edge of the absorber 4.
  • the surface (non-skin contact surface) on the back sheet 3 side of the panty liner 10 is provided with an adhesive portion (not shown) for fixing to underwear such as shorts.
  • the skin contact surface is a surface directed to the wearer's skin side when worn in the absorbent article or a component thereof, and the non-skin contact surface is the wearer's skin when worn in the absorbent article or component thereof. It is the surface that is directed to the side opposite to the skin side (usually the underwear side).
  • the absorbent body 4 of the panty liner 10 is composed of an absorbent sheet 42, and more specifically, a laminate in which the absorbent sheet 42 is laminated in two or more layers.
  • the laminate of two or more layers may be a laminate obtained by folding a single absorbent sheet and adhering the layers between them.
  • a plurality of laminated sheets may be used.
  • an absorbent sheet containing a fiber material and a water-absorbing polymer is used as the absorbent sheet 42.
  • an absorbent sheet it is possible to bond between constituent fibers or between constituent fibers and the water-absorbing polymer through adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or adhesive fiber added separately.
  • a sheet or the like can be preferably used.
  • an absorbent sheet an absorbent sheet manufactured by the method described in JP-A-8-246395, a pulverized pulp supplied in an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, vinyl acetate) is deposited.
  • An absorbent sheet obtained by blending a highly water-absorbing polymer during the process can also be used.
  • These absorbent sheets can also be used as an absorber having a single layer structure without being laminated in two or more layers. In addition, the layers between the layers may not be bonded.
  • the thickness of the absorber 4 is preferably 0.1 mm or more, more preferably 0.5 mm or more, preferably 5 mm or less, more preferably 2 mm or less, and preferably 0.1 mm or more and 5 mm or less, more preferably. Is 0.5 mm or more and 2 mm or less.
  • the thickness of the absorber 4 is measured by the following method.
  • the thickness T is measured using a peacock precision measuring instrument (model R1-C) which is a micrometer having two parallel pressing surfaces (a fixed pressing surface and a movable pressing surface).
  • the diameter of the measuring element movable pressing surface is 5 mm, and the pressure is 100 kPa or less.
  • the size of the test specimen for measurement is not less than the size of the following plate.
  • a 20 mm ⁇ 20 mm plate (mass 5.4 g) is placed on the test piece, the measuring element movable pressurizing surface is operated at a speed of 2 mm / s, applied to the plate, and the value immediately after stabilization is read.
  • the pressure between the pressing surfaces (pressure applied to the test piece) is 1.3 kPa or less.
  • the back sheet 3 various materials conventionally used for the back sheet of the absorbent article can be used without particular limitation.
  • a liquid-impermeable or water-repellent resin film, a resin film, A laminate sheet with a non-woven fabric can be used.
  • the topsheet 2 in the panty liner 10 of the present embodiment has a concavo-convex structure in which streaky ridges 13 and ridges 14 extending in one direction are alternately arranged in the width direction. It is comprised from the nonwoven fabric 1 of this.
  • the surface sheet 2 is joined in the concave strip part 14 in the adjacent lower sheet 6 and the joint part 14s, and the convex strip part 13 is the nonwoven fabric 1 and lower side.
  • the sheet 6 has a hollow structure.
  • the nonwoven fabric 1 which comprises the surface sheet 2 contains the fiber 11 which has the large diameter part 17 and the small diameter parts 16 and 16 from which a fiber diameter mutually differs, as shown in FIG. 6 mentioned later.
  • FIG. 4 shows a perspective view of a nonwoven fabric 1 (hereinafter also referred to as “nonwoven fabric 1”) used as the top sheet 2 in the panty liner 10 of the present embodiment.
  • FIG. 5 is a schematic diagram showing a cross section in the thickness direction of the nonwoven fabric 1 shown in FIG. 4.
  • FIG. 6 is an enlarged schematic view of the constituent fibers 11 of the nonwoven fabric 1 shown in FIG.
  • the nonwoven fabric 1 is a nonwoven fabric provided with a plurality of fusion portions 12 (see FIG. 6) formed by heat-sealing the intersections of the constituent fibers 11.
  • "one direction" from which the protruding line part 13 and the recessed line part 14 extend is the same direction as the longitudinal direction X of the panty liner 10, and is one direction (X direction). Also written.
  • the nonwoven fabric 1 has a plurality of ridge portions 13 in which the cross-sectional shapes of the front and back surfaces a and b are convex upward in the thickness direction (Z direction), It has the concave line part 14 located between adjacent convex line parts 13 and 13.
  • FIG. 14 the cross-sectional shape of front and back both surfaces a and b has comprised the concave shape toward the upper direction of the thickness direction (Z direction) of a nonwoven fabric.
  • the concave stripe part 14 the cross-sectional shape of front and back both surfaces a and b has comprised the convex shape toward the downward direction of the thickness direction (Z direction) of a nonwoven fabric.
  • Each of the plurality of ridges 13 extends continuously in one direction (X direction) of the nonwoven fabric 1, and each of the plurality of ridges 14 extends continuously in one direction X of the nonwoven fabric 1. I am doing.
  • the ridges 13 and the ridges 14 are parallel to each other and are alternately arranged in a direction (Y direction) orthogonal to the one direction (X direction).
  • the nonwoven fabric 1 is comprised from the top part area
  • the top region 13a, the bottom region 13b, and the side region 13c extend continuously in one direction (X direction) of the nonwoven fabric 1.
  • the top region 13a, the bottom region 13b, and the side region 13c when the nonwoven fabric 1 is viewed in a cross-section along the thickness direction Z, divides the thickness of the nonwoven fabric 1 in the Z direction into three equal parts,
  • the top region 13a is distinguished from the central region as the side region 13c and the lower region as the bottom region 13b.
  • the top of the ridge 13 is formed from a top region 13a.
  • the bottom part of the concave line part 14 is formed from the bottom part area
  • the nonwoven fabric 1 is manufactured by subjecting the fiber sheet 1a to uneven processing using a pair of uneven rollers 401 and 402 that mesh with each other.
  • the longitudinal direction X of the nonwoven fabric 1 described above is the same direction as the machine direction (MD, flow direction) when the nonwoven fabric 1 is manufactured by performing uneven processing on the fiber sheet 1a (see FIG. 8).
  • the direction Y orthogonal to the X direction is the same direction as the orthogonal direction (CD, roll axis direction) orthogonal to the machine direction (MD, flow direction).
  • the fiber density of the side region 13c is lower than the fiber density of the top region 13a and the fiber density of the bottom region 13b.
  • the fiber density is the number of fibers per unit area in the cross section of the nonwoven fabric 1. Therefore, the side region 13c is a sparse region in which the number of fibers is small (the interfiber distance is large) compared to the top region 13a and the bottom region 13b. Due to this, the side region 13c has higher air permeability than the top region 13a and the bottom region 13b.
  • the panty liner of the present embodiment using the nonwoven fabric 1 as the top sheet 2 circulates along the concave strip portion 14 in the mounted state, and in the convex strip portion 13 through the side region 13c.
  • the air flows in the direction orthogonal to the ridges 13.
  • the panty liner of this embodiment has a structure in which air flows in both the longitudinal direction X and the width direction Y on the skin facing surface side, the air permeability on the skin facing surface side is good. Thus, it is difficult for the stuffiness to occur when worn.
  • the concavo-convex structure of the topsheet 2 can easily follow the movement of the wearer when the panty liner 10 is worn, The hit is good.
  • each side edge of the panty liner 10 has a curved shape, and in the longitudinal direction front area 10A and the rear area 10B, each side edge is convex outward in the width direction.
  • each side edge is curved in a convex shape toward the inner side in the width direction, so that the width in the longitudinal central region 10C is the narrowest. It becomes easy to efficiently discharge water vapor toward the outside in the direction Y. This also makes it difficult for the panty liner 10 to be stuffy when worn.
  • the ratio (D 13c / D 13a , D 13c / D 13a ) of the fiber density (D 13c ) of the side region 13c to the fiber density (D 13a ) in the top region 13a or the fiber density (D 13b ) in the bottom region 13b ) Is preferably 0.15 or more and 0.9 or less, more preferably 0.2 or more and 0.8 or less.
  • the value of the fiber density of the nonwoven fabric 1 is such that the fiber density (D 13a ) in the top region 13a is preferably 90 / mm 2 or more and 200 / mm 2 or less, more preferably 100 / mm 2 or more. 180 pieces / mm 2 or less.
  • the fiber density (D 13b) at the bottom area 13b is preferably 80 present / mm 2 or more 200 present / mm 2 or less, more preferably 90 present / mm 2 or more 180 lines / mm 2 or less.
  • the fiber density of the side region 13c (D 13c) is preferably 30 lines / mm 2 or more eighty / mm 2 or less, more preferably 40 present / mm 2 or more 70 yarns / mm 2 or less.
  • the method for measuring the fiber density is as follows.
  • the nonwoven fabric is cut along the thickness direction Z using a feather razor (product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.).
  • the top region 13a which is the upper part when the thickness of the cut surface of the nonwoven fabric is divided into three equal parts in the Z direction, is magnified using a scanning electron microscope (fiber cross section is 30 to 30%). The magnification is adjusted so that about 60 fibers can be measured (150 to 500 times), and the number of cross sections of the fibers cut by the cut surface per fixed area (about 0.5 mm 2 ) is counted.
  • the fiber density in the top region 13a converts into the number of cross sections of the fiber per 1 mm ⁇ 2 >, and makes this the fiber density in the top region 13a.
  • the measurement is performed at three locations, and the average is the fiber density of the sample.
  • the fiber density in the bottom region 13b is obtained by measuring the lower part when the thickness of the cut surface of the nonwoven fabric is divided into three equal parts in the Z direction.
  • the fiber density of the side region 13c is obtained by measuring the central portion when the thickness of the cut surface of the nonwoven fabric is divided into three equal parts in the Z direction.
  • JCM-5100 (trade name) manufactured by JEOL Ltd. is used.
  • the fiber density (D 13c) of the side region 13c in the convex portion 13 is preferably 30 present / mm 2 or more eighty / mm 2 or less, more preferably 40 present / mm 2 or more 70 lines / mm 2 or less. That is, although the fiber density in the side region 13c is preferably lower than the fiber density in the top region 13a and the bottom region 13b, the fiber density in the side region 13c is preferably not zero. In other words, the fiber density of the side region 13c is preferably greater than 0 / mm 2 . That the fiber density of the side region 13c is zero means that a through hole is formed in the side region 13c.
  • the fiber density of the side region 13c is zero, that is, when a through hole is formed in the side region 13c, liquid return is likely to occur through the through hole, or the ridge 13 is likely to be crushed. Or If the number of through-holes formed is reduced in order to prevent the inconvenience caused by forming these through-holes, the air flowability in the direction perpendicular to the ridges 13 is reduced due to this. End up. In this way, there are various inconveniences in forming the through hole in the side region 13c, but if the fiber density of the side region 13c is lowered as in this embodiment, the liquid return and the ridges are formed. There is an advantage that air flowability in a direction orthogonal to the ridges 13 can be ensured while preventing the crushing of 13.
  • the concavo-convex structure of the nonwoven fabric 1 including the ridges 13 and the ridges 14 is preferably formed at least in the central region in the width direction Y of the panty liner 1.
  • the uneven structure can be provided in a portion that is most likely to come into contact with the skin of the wearer, so that the above-described effect of preventing stuffiness and the effect of following the operation of the wearer are reliably exhibited.
  • the topsheet 2 has a concavo-convex structure in the entire region inside the peripheral portion 7 (see FIG. 1) from the viewpoint that these effects become more remarkable.
  • each side edge 4a of the absorbent body 4 is linear, and the extending direction of the side edge 4a is defined as the concavo-convex structure, that is, the ridge portion. It is preferable to make it substantially parallel to the direction in which 13 and the recessed line portion 14 extend. By doing so, the topsheet 2 is easily bent at the side edge 4a of the absorbent body 4, and the uncomfortable feeling of wearing the panty liner 10 is reduced.
  • substantially parallel includes a case where they are completely parallel and a case where the angles intersect within 3 degrees.
  • the constituent fiber 11 of the nonwoven fabric 1 contains high elongation fibers.
  • the high elongation fiber included in the constituent fiber 11 means not only a fiber having a high elongation at the raw material fiber stage, but also a fiber having a high elongation at the stage of the produced nonwoven fabric 1.
  • melt spinning is performed at a low speed to form a composite
  • heat-extensible fiber obtained by performing heat treatment and / or crimping treatment without performing a stretching treatment, the crystal state of the resin being changed by heating, and extending the length, or polypropylene
  • the high elongation fiber is preferably a core-sheath type composite fiber having heat-fusibility.
  • the core-sheath type composite fiber may be a concentric core-sheath type, an eccentric core-sheath type, a side-by-side type, or a deformed type, but is preferably a concentric core-sheath type.
  • the fineness of the high elongation fiber is 1.0 dtex or more and 10.0 dtex or less at the raw material stage. Is preferable, and more preferably 2.0 dtex or more and 8.0 dtex or less.
  • the constituent fibers 11 of the nonwoven fabric 1 may be configured to include other fibers in addition to the high elongation fibers, but are preferably configured only from the high elongation fibers.
  • Other fibers include, for example, a non-heat-extensible core-sheath type heat-fusible composite fiber containing two components having different melting points, or a fiber that does not inherently have heat-fusibility ( Examples thereof include natural fibers such as cotton and pulp, rayon and acetate fibers).
  • the proportion of the high elongation fibers in the nonwoven fabric 1 is preferably 50% by mass to 100% by mass, and more preferably 80%. It is not less than 100% by mass.
  • the heat-stretchable composite fiber that is a high-stretch fiber is a composite fiber that has been subjected to an unstretched or weakly stretched treatment at the raw material stage.
  • a 1st resin component is a component which expresses the heat
  • a 2nd resin component is a component which expresses heat-fusibility.
  • the melting points of the first resin component and the second resin component were determined by thermal analysis of a finely cut fiber sample (sample weight 2 mg) using a differential scanning calorimeter (DSC6200 manufactured by Seiko Instruments Inc.) at a heating rate of 10 ° C./min.
  • the melting peak temperature of each resin is measured and defined by the melting peak temperature.
  • the resin is defined as “resin having no melting point”.
  • the temperature at which the second resin component is fused to such an extent that the strength of the fusion point of the fiber can be measured is used as the temperature at which the molecular flow of the second resin component begins, and this is used instead of the melting point.
  • the polyethylene resin is included.
  • the polyethylene resin include low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE).
  • LDPE low density polyethylene
  • HDPE high density polyethylene
  • LLDPE linear low density polyethylene
  • a high density polyethylene having a density of 0.935 g / cm 3 or more and 0.965 g / cm 3 or less is preferable.
  • the second resin component constituting the sheath is preferably a polyethylene resin alone, but other resins can also be blended.
  • Other resins to be blended include polypropylene resin, ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl alcohol copolymer (EVOH), and the like.
  • the 2nd resin component which comprises a sheath part it is preferable that 50 mass% or more in the resin component of a sheath part is 70 to 100 mass% especially polyethylene resin.
  • the polyethylene resin preferably has a crystallite size of 10 nm or more and 20 nm or less, and more preferably 11.5 nm or more and 18 nm or less.
  • a resin component having a melting point higher than that of the polyethylene resin that is a constituent resin of the sheath portion can be used without any particular limitation.
  • the resin component constituting the core include polyolefin resins such as polypropylene (PP) (excluding polyethylene resin), polyester resins such as polyethylene terephthalate (PET), and polybutylene terephthalate (PBT).
  • PP polypropylene
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • polyamide-based polymers, copolymers having two or more resin components, and the like can also be used.
  • a plurality of types of resins can be blended and used.
  • the melting point of the core is the melting point of the resin having the highest melting point.
  • the difference between the melting point of the first resin component constituting the core part and the melting point of the second resin component constituting the sheath part is 20 ° C. or higher. It is preferable that it is 150 degrees C or less.
  • the preferred orientation index of the first resin component in the heat-stretchable composite fiber which is a high elongation fiber, is naturally different depending on the resin used.
  • the orientation index is 60% or less. Is preferable, more preferably 40% or less, and still more preferably 25% or less.
  • the first resin component is polyester
  • the orientation index is preferably 25% or less, more preferably 20% or less, and still more preferably 10% or less.
  • the second resin component preferably has an orientation index of 5% or more, more preferably 15% or more, and still more preferably 30% or more.
  • the orientation index is an index of the degree of orientation of the polymer chain of the resin constituting the fiber. And when the orientation index of a 1st resin component and a 2nd resin component is each said value, a heat
  • the orientation index of the first resin component and the second resin component is determined by the method described in paragraphs [0027] to [0029] of JP 2010-168715 A.
  • a method for achieving the orientation index as described above for each resin component in the thermally extensible composite fiber is described in paragraphs [0033] to [0036] of JP-A No. 2010-168715.
  • the elongation of the high elongation fiber is preferably 100% or more, particularly 200% or more, particularly 250% or more at the raw material stage.
  • the elongation of the high elongation fiber is preferably 800% or less, particularly 500% or less, particularly 400% or less at the raw material stage.
  • the elongation of the high elongation fiber is preferably 100% or more and 800% or less, more preferably 200% or more and 500% or less, and further preferably 250% or more and 400% or less at the raw material stage. It is.
  • the elongation of the high elongation fiber conforms to JISL-1015, and the measurement is based on the measurement environment temperature and humidity of 20 ⁇ 2 °C, 65 ⁇ 2% RH, the tensile tester's gripping distance is 20mm, and the tensile speed is 20mm / min. And, when collecting fibers from an already manufactured non-woven fabric and measuring the elongation, when the gripping interval cannot be 20 mm, that is, when the length of the fiber to be measured is less than 20 mm, the gripping interval is set. Measure by setting to 10 mm or 5 mm.
  • the ratio (mass ratio, the former: latter) of the first resin component and the second resin component in the heat-stretchable composite fiber that is a high elongation fiber is 10:90 to 90:10, particularly 20: It is preferably 80 to 80:20, particularly 50:50 to 70:30.
  • the fiber length of the heat-extensible conjugate fiber one having an appropriate length is used according to the method for producing the nonwoven fabric. For example, when the nonwoven fabric is manufactured by the card method as described later, the fiber length is preferably about 30 to 70 mm.
  • the fiber diameter of the heat-extensible composite fiber which is a high elongation fiber, is appropriately selected according to the specific use of the nonwoven fabric at the raw material stage.
  • the nonwoven fabric is used as a constituent member of an absorbent article such as a surface sheet of the absorbent article, it is preferable to use a nonwoven fabric having a size of 10 ⁇ m to 35 ⁇ m, particularly 15 ⁇ m to 30 ⁇ m.
  • the fiber diameter is measured by the following method.
  • the fiber diameter As the fiber diameter, the fiber diameter ( ⁇ m) is measured by observing the cross section of the fiber at 200 to 800 times with a microscope VH-8000 (manufactured by Keyence Corporation). The cross section of the fiber is obtained by cutting the fiber using a feather razor (product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). For each extracted fiber, the fiber diameter when approximated to a circle is measured at five locations, and the average value of the five measured values is taken as the fiber diameter.
  • a feather razor product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.
  • Japanese Patent No. 4131852 Japanese Patent Laid-Open No. 2005-350836, Japanese Patent Laid-Open No. 2007-303035
  • JP-A No. 2007-204899, JP-A No. 2007-204901 and JP-A No. 2007-204902 can also be used.
  • the nonwoven fabric 1 pays attention to one constituent fiber 11 among the constituent fibers 11 of the nonwoven fabric 1, and the constituent fiber 11 is between the adjacent fusion portions 12, 12. It is preferable to have a large diameter portion 17 having a large fiber diameter sandwiched between two small diameter portions 16 and 16 having a small fiber diameter. Specifically, as shown in FIG. 6, paying attention to one constituent fiber 11 of the constituent fibers 11 of the nonwoven fabric 1, a fusion formed by heat-sealing the intersection with the other constituent fibers 11. A small diameter portion 16 having a small fiber diameter extends from the landing portion 12 with substantially the same fiber diameter.
  • the non-woven fabric 1 focuses on one constituent fiber 11, and from one of the adjacent fused portions 12, 12 toward the other fused portion 12, It has constituent fibers 11 arranged in the order of a small diameter portion 16 on the side of the attachment portion 12, one large diameter portion 17, and a small diameter portion 16 on the side of the other fusion portion 12.
  • the nonwoven fabric 1 focuses on one constituent fiber 11 among the constituent fibers 11 of the nonwoven fabric 1, and includes a plurality of large-diameter portions 17 between the adjacent fusion portions 12 and 12. (2 in the nonwoven fabric 1) It has the constituent fiber 11 provided. Specifically, the non-woven fabric 1 focuses on one constituent fiber 11, and from one of the adjacent fused portions 12, 12 toward the other fused portion 12, Constituent fibers arranged in the order of the small-diameter portion 16 on the bonding portion 12 side, the first large-diameter portion 17, the small-diameter portion 16, the second large-diameter portion 17, and the small-diameter portion 16 on the other fused portion 12 side. 11.
  • the non-woven fabric 1 preferably focuses on one constituent fiber 11, and has a large-diameter portion 17 between adjacent fused portions 12, 12, preferably from the viewpoint of improving the touch and preventing the strength of the non-woven fabric from being reduced. It is preferable to provide 1 or more and 5 or less, more preferably 1 or more and 3 or less, from the viewpoint of improving the touch and reducing the strength of the nonwoven fabric.
  • the ratio (L 16 / L 17 ) of the fiber diameter (diameter L 16 ) of the small diameter portion 16 to the fiber diameter (diameter L 17 ) of the large diameter portion 17 is preferably 0.5 or more and 0.8 or less, more preferably 0. .55 or more and 0.7 or less.
  • the fiber diameter (diameter L 16 ) of the small-diameter portion 16 is preferably 5 ⁇ m or more and 28 ⁇ m or less, more preferably 6.5 ⁇ m or more and 20 ⁇ m or less, and particularly preferably 7.5 ⁇ m or more and 16 ⁇ m or less from the viewpoint of improving the touch. is there.
  • the fiber diameter (diameter L 17 ) of the large diameter portion 17 is preferably 10 ⁇ m or more and 35 ⁇ m or less, more preferably 13 ⁇ m or more and 25 ⁇ m or less, and particularly preferably 15 ⁇ m or more and 20 ⁇ m or less from the viewpoint of improving the touch.
  • the fiber diameters (the diameters L 16 and L 17 ) of the small diameter part 16 and the large diameter part 17 are measured in the same manner as the fiber diameter measurement described above.
  • the nonwoven fabric 1 pays attention to one constituent fiber 11 among the constituent fibers 11 of the nonwoven fabric 1, from the small diameter portion 16 adjacent to the fused portion 12 to the large diameter portion 17. It is preferable that the change point 18 is arranged within a range of 1 / of the interval T between the fusion parts 12, 12 adjacent to the fusion part 12.
  • the change point 18 of the nonwoven fabric 1 is a gradual change continuously from the small diameter portion 16 extending with a small fiber diameter to the large diameter portion 17 extending with a fiber diameter larger than the small diameter portion 16. This means a portion where the fiber diameter changes extremely in one step without including a portion that continuously changes over a plurality of stages.
  • the change point 18 of the nonwoven fabric 1 is the 1st resin component which comprises a core part, and the 2nd resin component which comprises a sheath part. It does not include a state in which the fiber diameter is changed by peeling between the layers, and it means a portion where the fiber diameter is changed by stretching.
  • the fact that the changing point 18 is arranged within a range of 1/3 of the interval T between the adjacent fused portions 12 and 12 from the fused portion 12 means that the constituent fibers 11 of the nonwoven fabric 1 are randomly extracted.
  • the constituent fibers 11 are formed between adjacent fused portions 12 and 12 of the constituent fibers 11. Magnify the image so that it can be observed (100 to 300 times).
  • the interval T between the centers of the adjacent fused portions 12 and 12 is divided into three equal parts, and the region AT on the side of one fused portion 12, the region BT on the side of the other fused portion 12, and the center region CT Break down.
  • the change point 18 is arranged in the area AT or the area BT.
  • the non-woven fabric 1 in which the changing point 18 is disposed within a range of 1/3 of the interval T between the adjacent fused portions 12, 12 from the fused portion 12 is the number of the constituent fibers 11 of the non-woven fabric 1 20.
  • the constituent fiber 11 in which the change point 18 is arranged in the region AT or the region BT means a nonwoven fabric having at least one of the 20 constituent fibers 11. Specifically, from the viewpoint of improving the touch, it is preferably 1 or more, more preferably 5 or more, and particularly preferably 10 or more.
  • the number of fibers having a change point 18 in the constituent fibers 11 constituting the side region 13c is the number of fibers having the change point 18 in the constituent fibers 11 constituting the top region 13a, and the bottom region 13b. Is formed more than the number of fibers having the change point 18 in the constituent fibers 11 constituting the.
  • the ratio (N 13c / N 13a , N 13c / N 13a ) of the number of fibers (N 13c ) having the change point 18 in the constituent fibers 11 constituting 13c is preferably 2 or more and 20 or less, more preferably 5 or more and 20 or less. It is.
  • the number of fibers having the change point 18 (N 13c ) in the constituent fibers 11 constituting the side region 13c is preferably 5 The number is 20 or more and 20 or less, more preferably 10 or more and 20 or less. Further, the number (N 13a ) of fibers having the change point 18 in the constituent fibers 11 constituting the top region 13a is preferably 1 or more and 15 or less, more preferably 5 or more and 15 or less. Further, the number (N 13b ) of fibers having the change point 18 in the constituent fibers 11 constituting the bottom region 13b is preferably 1 or more and 15 or less, more preferably 5 or more and 15 or less.
  • the method for measuring the number of fibers having the change point 18 is as follows.
  • the measurement is performed at three places, and the average is the number of fibers having the change point 18 in the constituent fibers constituting the top region 13a of the sample.
  • the vicinity of the bottom point of the bottom region 13b, which is a lower part when the thickness of the nonwoven fabric is equally divided into three in the Z direction Determine by measuring.
  • the number of fibers having the change point 18 in the constituent fibers 11 constituting the side region 13c is obtained by measuring the central portion when the thickness of the nonwoven fabric is equally divided into three in the Z direction.
  • JCM-5100 (trade name) manufactured by JEOL Ltd. is used.
  • Sheet thickness T S is may be adjusted as appropriate depending on the application, when used as a topsheet or sublayer of the absorbent article, preferably 0.5mm or more 7mm or less, more preferably 5mm or 1.0 mm. By setting it as this range, the bodily fluid absorption speed
  • the layer thickness TL may be different at each site in the nonwoven fabric 1 and may be appropriately adjusted depending on the application.
  • the layer thickness T L1 of the top region 13a is preferably 0.1 mm or greater and 3.0 mm or less, and more preferably 0.2 mm or greater and 2.0 mm or less.
  • the layer thickness T L2 of the bottom region 13b is preferably 0.1 mm or greater and 3.0 mm or less, and more preferably 0.2 mm or greater and 2.0 mm or less.
  • the layer thickness T L3 of the side region 13c is preferably 0.1 mm or greater and 3.0 mm or less, and more preferably 0.2 mm or greater and 2.0 mm or less.
  • the relationship between the layer thicknesses T L1 , T L2 , and T L3 is within this range, so that the body fluid absorption speed during use is fast, the liquid return from the absorber is suppressed, and an appropriate cushioning property is realized. it can.
  • the sheet thickness T S and the layer thickness T L are measured by the following methods.
  • Method of measuring the thickness of the sheet T S is in a state of applying a load of 0.05kPa nonwoven 1 is measured using a thickness gauge.
  • a laser displacement meter manufactured by OMRON Corporation is used for the thickness measuring instrument. Thickness is measured at 10 points, and the average value is calculated as the thickness.
  • the layer thickness TL is measured by enlarging the cross section of the sheet with a Keyence digital microscope VHX-900 by about 20 times to measure the thickness of each layer.
  • the pitch between the tops of the protruding strips 13 adjacent in the Y direction is preferably 1 mm or more and 15 mm or less, and more preferably 1.5 mm or more and 10 mm or less.
  • the height H (see FIG. 4) of the ridge 13 is preferably 0.5 mm to 5 mm, and more preferably 1 mm to 3 mm. The height H is measured under a no load by observing a cross section in the thickness direction Z of the nonwoven fabric 1 with a microscope.
  • the basis weight of the nonwoven fabric 1 is preferably 15 g / m 2 or more 50 g / m 2 or less the average value of the entire, 20 g / m 2 or more 40 g / m 2 or less is more preferable.
  • a small amount of fiber treatment agent such as fiber colorant, antistatic property agent, lubricant, hydrophilic agent may be adhered to the surface of the constituent fiber 11 of the nonwoven fabric 1 at the raw material stage.
  • various known methods can be employed without any particular limitation. For example, application by spraying, application by a slot coater, application by roll transfer, immersion in a fiber treatment agent, and the like can be mentioned. These treatments may be performed on the fibers before being made into a web, or after the fibers are made into a web by various methods. However, it is necessary to perform the process before the hot air blowing process described later.
  • the fiber having the fiber treatment agent attached to the surface is dried at a temperature sufficiently lower than the melting point of the polyethylene resin (for example, 120 ° C. or less) by, for example, a hot air blowing type dryer.
  • the top sheet 2 in the panty liner 10 of the present embodiment is heat-sealed with the adjacent lower sheet 6 in each of the concave portions 14 of the nonwoven fabric 1 constituting the top sheet 2.
  • the lower sheet 6 in the present embodiment is a second sheet 6 made of an aggregate of thermoplastic resin fibers disposed between the top sheet 2 and the absorber 4.
  • a nonwoven fabric can be generally used.
  • the concave strip portion 14 of the surface sheet 2 is continuously joined to the second sheet 6 in the longitudinal direction of the panty liner 10, and the joint portion 14s extends between the seal portions 7 located at both ends in the longitudinal direction. In the meantime, it can be intermittently formed along the longitudinal direction X of the panty liner 10.
  • the joining of the top sheet 2 and the second sheet 6 is not limited to the above-described heat fusion, and other joining means such as joining with an adhesive such as a hot melt adhesive may be employed.
  • the second sheet 6 can be made shorter in the longitudinal direction X and the width direction Y than the top sheet 2.
  • the length of the second sheet 6 in the longitudinal direction X and the width direction Y can be the same as that of the top sheet 2.
  • the concavo-convex structure of the topsheet 2 is not easily crushed even if a load is applied thereto.
  • a load for example, in a state where a load of 4 g / cm 2 is applied to the panty liner 10 from the surface sheet 2 side, it is preferable that the ridge portion can maintain its hollow structure, and a state where a load of 20 g / cm 2 is applied. And it is still more preferable that a protruding item
  • a hollow structure can be maintained means that a space exists inside the ridge 13 even after a load is applied, and the shape of the space is allowed to be deformed before the load is applied.
  • the Whether or not there is a space inside the ridge 13 is determined by cutting the joined body of the top sheet and the second sheet 6 along the thickness direction Z to form a cross section, and observing the cross section with a microscope. Check.
  • the load of 4 g / cm 2 assumes a pressure applied to the panty liner 10 when the panty liner 10 is attached to the shorts and the shorts are worn.
  • the load of 20 g / cm 2 assumes a pressure applied to the panty liner 10 when the wearer sits on the chair in the wearing state of the panty liner 10.
  • the ridges 13 are not easily crushed with respect to the load also contributes to the fact that the constituent fibers of the nonwoven fabric 1 are high elongation fibers.
  • the fiber sheet 1a (refer FIG. 8) is extended
  • the fiber is less likely to be cut in the drawing process of the fiber sheet 1a, and the low-fiber density side region 13c is successfully formed while The strength reduction can be effectively prevented.
  • nonwoven fabrics obtained by various manufacturing methods can be used.
  • an air-through nonwoven fabric in which heat-bonding points between fibers are formed on a fiber web obtained by the card method or airlaid method, and a heat-bonding point between fibers is formed on a fiber web obtained by the card method by a heat roll method.
  • Various nonwoven fabrics such as heat roll nonwoven fabric, heat embossed nonwoven fabric, spun lace nonwoven fabric, needle punched nonwoven fabric, and resin bonded nonwoven fabric can be used.
  • the nonwoven fabric an apparent density of 0.005 g / cm 3 or more 0.5 g / cm 3 or less, it is particularly preferable to use 0.01 g / cm 3 or more 0.1 g / cm 3 or less is bulky nonwoven.
  • the second sheet 6 functions as a spacer that separates the absorber 4 and the top sheet 2, and promotes air flow between the absorber 4 and the top sheet 2. . Also by this, the stuffiness in the wearing state of the panty liner 10 is further prevented.
  • the bulky nonwoven fabric for example, an air-through nonwoven fabric, an airlaid nonwoven fabric, a resin bond nonwoven fabric, or the like can be suitably used.
  • the width of the top sheet 2 and the second sheet 6 are reduced by making the width of the absorbent body 4 smaller than both the width of the top sheet 2 and the width of the second sheet 6 in at least the central region 10C in the longitudinal direction of the panty liner 10.
  • the portion that extends outward in the width direction from the side edge 4a of the absorber 4 can be easily maintained.
  • the water vapor permeability at the left and right sides of the panty liner 10 is less likely to be impaired. Therefore, the stuffiness in the wearing state is further reduced.
  • the nonwoven fabric 1 used as the top sheet 2 is a fusion that forms a fiber sheet by thermally fusing the intersections of the constituent fibers of a fiber web containing high elongation fibers at the fusion part. It is suitably manufactured by a method for manufacturing a nonwoven fabric comprising a step and a stretching step of stretching the fiber sheet in one direction.
  • FIG. 8 schematically shows a preferable manufacturing apparatus 100 used in the method for manufacturing the nonwoven fabric 1.
  • the manufacturing apparatus 100 is suitably used for manufacturing an air-through nonwoven fabric.
  • the manufacturing apparatus 100 includes a web forming unit 200, a hot air processing unit 300, an extending unit 400, and a lower sheet joining unit 500 in this order from the upstream side to the downstream side of the manufacturing process.
  • the web forming unit 200 is provided with a web forming apparatus 201 as shown in FIG.
  • a card machine is used as the web forming apparatus 201.
  • a card machine the thing normally used in the technical field of an absorbent article can be used without a restriction
  • other web manufacturing apparatuses such as airlaid apparatuses can be used.
  • the hot air processing unit 300 includes a hood 301 as shown in FIG. Inside the hood 301, hot air can be blown by an air-through method.
  • the hot air processing unit 300 includes an endless conveyor belt 302 made of a breathable net.
  • the conveyor belt 302 circulates in the hood 301.
  • the conveyor belt 302 is made of a resin such as polyethylene terephthalate or a metal.
  • the temperature of the hot air blown in the hood 301 and the heat treatment time are preferably adjusted so that the intersections of the high elongation fibers included in the constituent fibers 11 of the fiber web 1b are heat-sealed. More specifically, the temperature of the hot air is preferably adjusted to a temperature higher by 0 ° C. to 30 ° C. than the melting point of the resin having the lowest melting point among the constituent fibers 11 of the fiber web 1b.
  • the heat treatment time is preferably adjusted to 1 to 5 seconds depending on the temperature of the hot air. Further, from the viewpoint of promoting further entanglement between the constituent fibers 11, the wind speed of the hot air is preferably about 0.3 m / sec to 1.5 m / sec. Further, the conveying speed is preferably about 5 m / min to 100 m / min.
  • the stretching unit 400 includes a pair of concave and convex rolls 401 and 402 that can be engaged with each other.
  • the pair of concave and convex rolls 401 and 402 are formed so as to be heatable, and are formed by alternately arranging large-diameter convex portions 403 and 404 and small-diameter concave portions (not shown) in the roll axis direction.
  • the uneven rolls 401 and 402 may or may not be heated, but the heating temperature when heating the uneven rolls 401 and 402 makes it easy to stretch the high elongation fibers included in the constituent fibers 11 of the fiber sheet 1a described later.
  • the temperature is 10 ° C. higher than the glass transition point of the fiber and 10 ° C. lower than the melting point, more preferably 20 ° C. higher than the glass transition point of the fiber, and 20 ° C. lower than the melting point. is there.
  • the temperature is preferably 67 ° C. or higher and 135 ° C. or lower, more preferably 77 ° C. or higher and 125 ° C. or lower, more preferably 87 ° C. or higher and 115 ° C. or lower.
  • the interval (pitch) between the large-diameter convex portions 403, 403 adjacent to each other in the roll axis direction of the uneven roll 401 and the roll axis direction of the uneven roll 402 are adjacent to each other.
  • the spacing (pitch) between the large-diameter convex portions 404 and 404 is the same spacing (pitch) w, and the spacing (pitch) w is such that the high elongation fibers included in the constituent fibers 11 of the fiber sheet 1a are successfully used in the stretching apparatus.
  • the pushing amount t of the pair of concave and convex rolls 401 and 402 (the distance between the vertex of the large-diameter convex portion 403 and the vertex of the large-diameter convex portion 404 adjacent to each other in the roll axis direction) is The thickness is preferably 1 mm or more and 3 mm or less, and particularly preferably 1.2 mm or more and 2.5 mm or less.
  • the mechanical stretch ratio is preferably 1.5 times or more and 3.0 times or less, and particularly preferably 1.7 times or more and 2.8 times or less.
  • the lower sheet bonding portion 500 includes a concavo-convex roll 402 and a flat roll 501 having a smooth surface, and has a concavo-convex shape between the large-diameter convex portion 404 of the concavo-convex roll 402 and the peripheral surface of the flat roll 501.
  • the nonwoven fabric 1 and the lower sheet 6 are joined by heating and pressing.
  • the manufacturing method of the nonwoven fabric 1 using the manufacturing apparatus 100 which has the above structure is demonstrated.
  • a short fiber-shaped constituent fiber 11 having a heat-extensible composite fiber that is a high elongation fiber is used as a raw material, and a web forming apparatus 201 that is a card machine is used.
  • a fiber web 1b is formed (web forming step).
  • the fiber web 1b manufactured by the web forming apparatus 201 is in a state where its constituent fibers 11 are loosely entangled with each other, and has not yet achieved shape retention as a sheet.
  • the fiber sheet 1 a is formed by thermally fusing the intersections of the constituent fibers 11 of the fiber web 1 b including the high elongation fibers at the fusion part 12 (fusing step). Specifically, the fiber web 1b is conveyed onto the conveyor belt 302, and hot air is blown in an air-through manner while passing through the hood 301 by the hot air processing unit 300. When hot air is thus blown by the air-through method, the constituent fibers 11 of the fiber web 10 are further entangled, and at the same time, the intersections of the entangled fibers are heat-sealed (see FIG. 10A), so that the sheet-like shape A fiber sheet 1a having shape retention is produced.
  • the fused fiber web 1a is stretched in one direction (stretching step). Specifically, the fused fiber web 1a having a shape-retaining property as a sheet is conveyed between a pair of concavo-convex rolls 401 and 402, as shown in FIGS. 10 (a) to 10 (c). In addition, the fiber web 1a is stretched, and a large fiber diameter is sandwiched between two small-diameter portions 16 and 16 having a small fiber diameter in one constituent fiber 11 between adjacent fusion portions 12 and 12. The large diameter portion 17 is formed, and the change point 18 from the small diameter portion 16 to the large diameter portion 17 is set to be 1/3 of the interval T between the fusion portions 12 and 12 adjacent to the fusion portion 12. Form within the range.
  • the fiber sheet 1a in which the intersections of the constituent fibers 11 are thermally fused at the fusion part 12 is conveyed between a pair of concave and convex rolls 401 and 402. Then, the fiber web 1a is stretched in the orthogonal direction (CD, roll axis direction) orthogonal to the machine direction (MD, flow direction).
  • CD orthogonal direction
  • MD machine direction
  • the adjacent fused portions 12, 12 fixing the constituent fibers 11 shown in FIG. Is actively stretched in the orthogonal direction (CD, roll axis direction).
  • CD orthogonal direction
  • MD machine direction
  • the small diameter portion 16 and the large diameter portion 17 are formed from the high elongation fiber, and at the same time, the large diameter convex portion 403 of the concave / convex roll 401 and the large diameter convex portion of the concave / convex roll 402 in the fiber sheet 1a.
  • a portion located between the portions 404 is extended more than other portions. In this case, since the constituent fiber of the fiber sheet 1a is a high elongation fiber, even if it is stretched, it is not cut and is successfully stretched.
  • corrugated roll 402 among the fiber sheets 1a is the side area 13c of the protruding item
  • FIG. Therefore, the fiber distance is not cut in the side region 13c by the above-described stretching, and the inter-fiber distance is increased as compared to before stretching. As a result, the fiber density of the side region 13c is lower than other parts, and air permeability is improved. And since the cut
  • the nonwoven fabric 1 manufactured as described above is conveyed to the sheet joining portion of the lower sheet joining portion 500 while being deformed into the uneven shape by the uneven roll 402.
  • the sheet joining portion is supplied with the strip-shaped nonwoven fabric 6 for the second sheet unwound from the roll-shaped roll 6 ′, and the uneven nonwoven fabric 1 is in a state of being overlapped with the strip-shaped nonwoven fabric 6. Introduced between the uneven roll 402 and the flat roll 501.
  • the concave strip portion and the strip-shaped nonwoven fabric 6 in the concave-convex nonwoven fabric 1 are between the large-diameter convex portion 404 of the concave-convex roll 402 and the peripheral surface of the flat roll 501.
  • a band-shaped composite sheet 8 is obtained in which the topsheet 2 made of the nonwoven fabric 1 is joined to the lower sheet 6 at the concave strip portion 14.
  • the belt-shaped composite sheet 8 is introduced into the production line of the panty liner 10 after being wound up, or is introduced into the production line of the panty liner 10 without being wound up.
  • FIG. 11 shows a perspective view of an incontinence pad 10 (hereinafter also simply referred to as “incontinence pad 10”) which is another embodiment of the present invention.
  • 12A is an enlarged cross-sectional view taken along the line II-II in FIG. 11, and
  • FIG. 12B is a diagram showing the back surface (surface on the non-skin contact surface side) of the absorbent body of the incontinence pad 10 shown in FIG.
  • FIG. 11 to FIG. 16 which will be described below, the explanation in detail about the embodiment shown in FIG. 1 to FIG. 11 to 16, the same members as those shown in FIGS. 1 to 10 are denoted by the same reference numerals.
  • the incontinence pad 10 includes a liquid-permeable top sheet 2 that forms a skin contact surface, a liquid-impermeable back sheet 3, and a space between the two sheets 2 and 3.
  • the absorbent body 4 is provided.
  • Liquid impermeability includes liquid impermeability.
  • the incontinence pad 10 has a vertically long shape, and has a longitudinal direction X and a width direction Y.
  • the longitudinal direction X coincides with the wearer's front-rear direction when the incontinence pad 10 is worn, and the width direction Y is a direction orthogonal to the longitudinal direction X in the plan view of the incontinence pad 10.
  • the incontinence pad 10 has an oval shape in plan view.
  • the top sheet 2 and the back sheet 3 extend from the periphery of the absorber 4.
  • an adhesive portion (not shown) for fixing to underwear such as shorts is provided.
  • the absorbent body 4 of the incontinence pad 10 includes an absorbent core 40 and a core wrap sheet 41 that wraps the absorbent core 40.
  • the absorptive core 40 can be comprised from the laminated fiber body of liquid absorbing fibers, such as a pulp, for example, and the mixed fiber body of this liquid absorbing fiber and a water absorbing polymer.
  • the liquid-absorbing fibers constituting the absorbent core 40 include cellulose-based hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate.
  • polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide may be included.
  • water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid.
  • Each of the fibers and the water-absorbing polymer can be used alone or in combination of two or more.
  • the core wrap sheet 41 a water-permeable fiber sheet such as tissue paper or nonwoven fabric is preferably used.
  • the core wrap sheet 41 may wrap the entire absorbent core 40 with one sheet, or may wrap the entire absorbent core 40 with two or more core wrap sheets.
  • the skin contact surface side and the non-skin contact surface side of the absorbent core 40 may be covered with separate sheets.
  • the thickness of the absorber 4 is preferably 1 mm or more, more preferably 2 mm or more, preferably 15 mm or less, more preferably 10 mm or less, and preferably 1 mm or more and 15 mm or less, more preferably 2 mm or more and 10 mm or less. is there.
  • the thickness of the absorber 4 is measured by the method described above.
  • Leak-proof cuffs 8 extending in the longitudinal direction are respectively provided at positions on both sides in the width direction Y on the skin contact surface side of the incontinence pad 10.
  • the leak-proof cuff 8 has a free end 8a and a fixed area 8b extending in the longitudinal direction.
  • the fixed area 8b is located on the top sheet 2.
  • the leak-proof cuff 8 is fixed to the top sheet 2 in the fixing region 8b. Further, the fixing region 8b of the leak-proof cuff 8 extends outward in the width direction Y, and the extending portion and the width direction extending portion of the back sheet 3 are joined to form the side flap 7. .
  • an elastic member 8c extending along the longitudinal direction X is attached in a stretched state at a position at or near the free end 8a.
  • a plurality of elastic members 8c are arranged substantially parallel to each other.
  • the portion where the plurality of elastic members 8c are attached forms a planar elastic region 8d.
  • the planar elastic region 8d has a predetermined length along the width direction Y and extends along the longitudinal direction X at least at the position of the wearer's excretory part.
  • the planar elastic region 8d can be expanded and contracted along the longitudinal direction X.
  • the leak-proof cuff 8 has a planar elastic structure in which the position between the free end 8a and the fixed end 8b rises in a substantially L shape toward the wearer's body.
  • the region 8d is in contact with the wearer's skin and prevents side leakage of the liquid.
  • the surface sheet 2 in the incontinence pad 10 of the present embodiment has stripe-like protruding ridges 13 and recessed ridges 14 extending in the longitudinal direction alternately arranged in the width direction. It is comprised from the nonwoven fabric 1 of the uneven structure. Moreover, as shown in FIG. 12A and FIG. 13, the topsheet 2 is joined to the adjacent second sheet 6 (lower sheet) at the joint portion 14 s at the concave strip portion 14, and the convex strip portion. 13 has a hollow structure with the second sheet 6.
  • the nonwoven fabric 1 which comprises the surface sheet 2 contains the fiber 11 which has the large diameter part 17 and the small diameter parts 16 and 16 from which a fiber diameter mutually differs as shown in FIG. 6 mentioned above.
  • the non-woven fabric 1 constituting the top sheet 2 will be described in more detail.
  • FIG. 13 the perspective view of the nonwoven fabric 1 used as the surface sheet 2 in the incontinence pad 10 of this embodiment is shown.
  • the nonwoven fabric 1 is a nonwoven fabric provided with a plurality of fusion portions 12 (see FIG. 6) formed by heat-sealing the intersections of the constituent fibers 11.
  • the "one direction" where the protruding line part 13 and the recessed line part 14 extend is the same direction as the longitudinal direction X of the incontinence pad 10.
  • “one direction” in which the ridges 13 and the recesses 14 extend is also referred to as an X direction.
  • the nonwoven fabric 1 has a plurality of ridges in which the cross-sectional shapes of both the front and back surfaces a and b are convex upward in the thickness direction (Z direction). It has the part 13 and the concave line part 14 located between adjacent convex line parts 13 and 13.
  • FIG. 14 the cross-sectional shape of front and back both surfaces a and b has comprised the concave shape toward the upper direction of the thickness direction (Z direction) of a nonwoven fabric.
  • the cross-sectional shape of front and back both surfaces a and b has comprised the convex shape toward the downward direction of the thickness direction (Z direction) of a nonwoven fabric.
  • Each of the plurality of ridges 13 extends continuously in one direction (X direction) of the nonwoven fabric 1
  • each of the plurality of ridges 14 extends continuously in one direction X of the nonwoven fabric 1. I am doing.
  • the ridges 13 and the ridges 14 are parallel to each other and are alternately arranged in a direction (Y direction) orthogonal to the one direction (X direction).
  • the concavo-convex structure of the nonwoven fabric 1 including the ridges 13 and the ridges 14 is formed at least in the central region in the width direction Y of the incontinence pad 10.
  • the constituent fiber 11 of the nonwoven fabric 1 contains high elongation fibers. Moreover, although the constituent fiber 11 of the nonwoven fabric 1 may be comprised including another fiber in addition to the high elongation fiber, it is preferable that it is comprised only from the high elongation fiber. Examples of high elongation fibers and other fibers are as described above.
  • the top of the ridge 13 is formed from the top region 13a, and the bottom of the ridge 14 is formed from the bottom region 13b. Therefore, the ridges 13 of the nonwoven fabric 1 constituting the top sheet 2 each have a side region 13c on both sides sandwiching the top region 13a, and the top region 13a between the top region 13a and the joint 14s. A side region 13c having a lower fiber density is formed. Due to the fact that the fiber density of the side region 13c is lower than the top region 13a or the top region 13a and the bottom region 13b, the liquid that has entered between the ridges 13 is projected via the side regions 13c.
  • the number of fibers having change points in the constituent fibers constituting the side region 13c constitutes the number of fibers having change points 18 in the constituent fibers constituting the top region 13a, and the bottom region 13b. More than the number of fibers having the change point 18 in the constituent fibers is formed.
  • the ratio (N 13c / N 13a , N 13c / N 13b ) of the number (N 13c ) of fibers having changing points in the constituent fibers to be formed is preferably 2 or more and 20 or less, more preferably 5 or more and 20 or less.
  • the number of fibers having the change point 18 (N 13a ) in the constituent fibers constituting the top region 13a is preferably one or more.
  • the number (N 13b ) of fibers having the change point 18 in the constituent fibers constituting the bottom region 13b is preferably 1 or more and 15 or less, more preferably 5 or more and 15 or less.
  • the number (N 13c ) of fibers having the change point 18 in the constituent fibers constituting the side region 13c is preferably 5 or more and 20 or less, and more preferably 10 or more and 20 or less.
  • the method for measuring the number of fibers having the change point 18 is as follows.
  • the top sheet 2 in the incontinence pad 10 of the present embodiment is a second sheet 6 as an adjacent lower sheet in each of the concave strip portions 14 of the nonwoven fabric 1 constituting the top sheet 2. And are joined by thermal fusion.
  • the lower sheet in the present embodiment is a second sheet 6 made of an aggregate of thermoplastic resin fibers disposed between the top sheet 2 and the absorber 4. As the aggregate of thermoplastic resin fibers, a nonwoven fabric can be generally used.
  • the concave strip portion 14 of the surface sheet 2 is joined to the second sheet 6 continuously along the longitudinal direction of the incontinence pad 10 as shown in FIG. 13 with the nonwoven fabric 1 made of thermoplastic resin fibers,
  • the joining portion 14s extends over the entire longitudinal direction of the portion where the top sheet 2 and the second sheet 6 overlap.
  • FIG. 14 by continuously joining the concave strip portion 14 of the top sheet 2 and the second sheet 6, the liquid that has migrated onto the second sheet 6 below the convex strip portion 13 is transferred to the adjacent convex strip portion. 13 can be efficiently diffused in the longitudinal direction X while preventing the downward movement.
  • the absorption capacity in a wide range in the longitudinal direction of the absorbent body 4 can be more effectively utilized while more reliably suppressing the discomfort caused by the excretion fluid coming into contact with the wearer's skin.
  • the top sheet 2 and the second sheet 6, more specifically, the non-woven fabric 1 constituting the top sheet 2 and the aggregates of fibers constituting the second sheet 6 each include fibers of thermoplastic resin.
  • the concave strip portion 14 of the topsheet 2 and the second sheet 6 are integrally heat-pressed and heat-sealed by heat sealing.
  • neither the constituent fiber of the nonwoven fabric 1 constituting the top sheet 2 nor the constituent fiber of the assembly of fibers constituting the second sheet 6 may maintain the fiber form. preferable.
  • the heating temperature by heat sealing is equal to or higher than the melting point of the constituent fibers of one or both of the nonwoven fabric and the fiber assembly.
  • the melting point of the constituent fiber in the case of a composite fiber composed of two components having different melting temperatures is the melting point of the component having the lowest melting point. Since the joining portion 14s has such a configuration, the liquid that has migrated onto the second sheet 6 under the ridge 13 is efficiently diffused in the longitudinal direction X while preventing the liquid from moving under the adjacent ridge 13. Can be made. Therefore, the absorption capacity in a wide range in the longitudinal direction of the absorbent body 4 can be more effectively utilized while more reliably suppressing the discomfort caused by the excretion fluid coming into contact with the wearer's skin.
  • the joining part 14s of the concave line part 14 and the second sheet 6 is liquid-impermeable.
  • the liquid impermeability here means that the liquid does not pass through the top sheet 2 or the second sheet 6.
  • Examples of the method for forming the liquid-impermeable joining portion 14s include a method in which the topsheet 2 and the second sheet 6 are heat-sealed so that the constituent fibers of both do not maintain the fiber form.
  • the second sheet 6 (lower sheet) may be joined by other joining means such as joining with an adhesive such as a hot melt adhesive. ).
  • the joining of the top sheet 2 and the second sheet 6 is not limited to the above-described heat fusion, and other joining means such as joining with an adhesive such as a hot melt adhesive may be employed.
  • the second sheet 6 can be made shorter in the longitudinal direction X and the width direction Y than the top sheet 2. Alternatively, the length of the second sheet 6 in the longitudinal direction X and the width direction Y can be the same as that of the top sheet 2.
  • the non-woven fabric constituting the second sheet 6 is preferably a long-fiber non-woven fabric in which the constituent fibers are oriented in the longitudinal direction X.
  • the long fiber nonwoven fabric is a nonwoven fabric composed of long fibers, and examples thereof include a spunbond nonwoven fabric and a spunlace nonwoven fabric.
  • nonwoven fabrics other than a long-fiber nonwoven fabric can also be used, for example, various constituents, such as a heat roll nonwoven fabric, a heat embossed nonwoven fabric, a spunlace nonwoven fabric, in which the constituent fibers are oriented in the longitudinal direction X
  • a nonwoven fabric or the like can also be used.
  • the degree of orientation of the fiber is measured as a MOR value by a microwave molecular orientation meter MOA-6004 (manufactured by Oji Scientific Instruments).
  • the degree of orientation of the fiber is an average value of 5 samples.
  • the liquid that has moved to the hollow space under the ridge 13 or the second sheet 6 moves under the ridge 13 to the adjacent ridge 13. It becomes easy to diffuse in the longitudinal direction without causing side leakage and stickiness.
  • the fiber density of the aggregate of the fibers that constitute the second sheet 6 is higher than the fiber density of the nonwoven fabric 1 that constitutes the top sheet 2.
  • the fiber density (D 13a ) of the nonwoven fabric constituting the top sheet 2 is the fiber at the top of the ridge 13. Density.
  • the fiber density (D13a) at the top of the ridge 13 is measured in the same manner as the fiber density in the top region 13a.
  • the fiber density (D 6 ) of the aggregate of fibers constituting the second sheet 6 is also the thickness of the aggregate of fibers constituting the second sheet 6 using a feather razor (part number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). Except for cutting along the direction Z and magnifying the cut surface at the non-joint portion in the fiber assembly, as described above [Method for measuring fiber density in the top region 13a, the bottom region 13b, and the side region 13c] Cut in the same way.
  • the fiber density of the non-joined portion 6a of the second sheet 6 is preferably measured by observing the cut surface of the second sheet 6 at a portion facing the top (top region 13a) of the ridge 13.
  • the ratio of the fiber density of the second sheet 6 (D 6) is preferably 1.1 or more, more preferably 2 or more.
  • high density portions 43 are formed at a plurality of locations in the width direction Y by embossing. Yes.
  • the high density portion 43 is formed so as to have a higher density than the portions 44 and 44 (hereinafter also referred to as a low density portion 44) located on both sides in the width direction, and extend in the longitudinal direction X, respectively. That is, in the absorbent body 4, the high density portions 43 and the low density portions 44 are alternately arranged.
  • each of the high density part 43 is formed in the position which overlaps with the top part of the protruding item
  • the high-density portion 43 extends in the longitudinal direction X and is formed in a plurality of rows in the width direction Y. Each of the high-density portions 43 is continuous with the top of the ridge 13 along the longitudinal direction X. Are overlapping.
  • the high density portion 43 in the present embodiment is formed by pressing between an embossing roll provided with a convex portion and a groove portion alternately extending in the circumferential direction or the axial direction and an anvil roll having a smooth surface on the circumferential surface. And in each high-density part 43, the thickness of the absorber 4 is thin compared with the other part.
  • the non-skin contact surface side surface of the absorber 4 is a surface on the embossing roll side, and the high density portion 43 is formed on the non-skin contact surface side surface of the absorber 4 on the embossing roll circumferential surface. It has a recess corresponding to the ridge.
  • the high density portion 43 may be formed only by pressurization, or may be formed by heating simultaneously with pressurization.
  • the number of high-density portions 43 formed in the width direction Y of the absorbent body 4 and overlapping with the tops of the ridges 13 of the topsheet 2 is plural, preferably 3 or more, more preferably 5 or more, and further Preferably it is 8 or more.
  • the high-density portion 43 has a length in the width direction Y of preferably 20 mm or more, more preferably 50 mm or more. Further, the high-density portion 43 has a continuous length in the longitudinal direction X of preferably 30% or more, more preferably 50% or more, and still more preferably 100% with respect to the total length in the same direction of the absorbent body 4. It is.
  • the high density portion 43 having a shape long in the longitudinal direction X may be continuously formed along the longitudinal direction X of the absorbent body 4, but as shown in FIG. Alternatively, the long, high-density portions 43 may be intermittently formed along the longitudinal direction X of the absorbent body 4.
  • the length L3 of the high-density portion 43 in the longitudinal direction X is preferably 0.5 mm or more, more preferably 1 mm or more, and the length L3 of the high-density portion 43 is equal to the length L3. It is preferably 5% or more, more preferably 30% or more of the total length L5 with the length between the high-density portions 43 and 43 adjacent to each other in the longitudinal direction X.
  • the ratio (D 3 / D 4 ) of the density (D 4 ) of the low density portion 44 to the density (D 3 ) of the high density portion 43 is preferably 1.5 or more, and more preferably 3 or more.
  • the density of the high-density part 43 and the low-density part 44 is narrow across the entire area in the thickness direction from the absorber 4 using a feather razor (part number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). A sample is cut out, the mass of each sample is measured, and the measured mass is obtained by dividing the measured area by the volume calculated by multiplying the planar view area by the thickness of the sample. The thickness of the sample is measured under no load before cutting out from the absorber.
  • the top sheet 2 is composed of the nonwoven fabric 1 having a concavo-convex structure having the ridges 13 and the ridges 14 extending in the longitudinal direction X, and the second sheet 6 is configured.
  • the liquid A such as urine
  • the liquid A is, as shown in FIG. 13 quickly enters between the two sides of the top of the ridge 13, particularly from the side region 13 c described above, onto the second sheet 6 below the ridge 13.
  • the liquid B which moved on or in the second sheet 6 under the ridge 13 has a density difference between the non-woven fabric 12 and the second sheet 6, and the recess 14 is joined to the second sheet 6.
  • the hollow structure inside the ridge 13 is easily maintained during wearing, it is difficult to return to the portion of the ridge 13 in contact with the skin. Thereby, the discomfort due to the excretion fluid coming into contact with the skin of the wearer can be more reliably suppressed.
  • the hydrophilicity of the second sheet 6 (lower sheet) is preferably higher than that of the top sheet 2.
  • the hydrophilicity of the second sheet 6 and the hydrophilicity of the top sheet 2 are determined by measuring the contact angle of water with the fibers constituting the second sheet 6 and the contact angle of water with the constituent fibers of the nonwoven fabric 1 constituting the top sheet 2. It is determined that the hydrophilicity of the smaller corner is small.
  • the incontinence pad 10 of this embodiment since it has the high-density part 43 in the part which overlaps with the top part (top part area
  • the liquid B transferred onto the second sheet 6 is absorbed by the high density portion 43 after flowing along the longitudinal direction X on the low density portion 44.
  • the absorption capacity of the wide range of the longitudinal direction of the absorber 4 can be utilized effectively, suppressing the discomfort by excretion liquid contacting a wearer's skin reliably.
  • the second sheet 6 and the absorbent body 4, the layer of the absorbent sheet constituting the absorbent body 4, and the absorbent body 4 and the back sheet 3 are joined with an adhesive, respectively.
  • an adhesive solid coating with a slot coater or the like may be used, but pattern coating is preferred.
  • the pattern coating application include spiral patterns, dot patterns, stripe patterns (striped patterns), lattice patterns, checkered patterns, and the like.
  • the absorbent article of this invention is not restrict
  • the above embodiment is an example in which the present invention is applied to a panty liner or incontinence pad, but instead of this, the present invention may be applied to other absorbent articles such as sanitary napkins and disposable diapers. Good.
  • the second sheet 6 made of non-woven fabric may have the same or shorter length in one or both of the longitudinal direction X and the width direction Y of the incontinence pad 10 as the top sheet 2. . Moreover, the incontinence pad 10 may not have a leak-proof cuff.
  • a liquid permeable top sheet that forms a skin contact surface, a back sheet and an absorbent article interposed between both sheets, and an absorbent article having a longitudinal direction and a width direction
  • the top sheet is composed of a nonwoven fabric having a concavo-convex structure in which strip-like ridges and recesses extending in the longitudinal direction are alternately arranged in the width direction, and is joined to the adjacent lower sheet in the recesses
  • the nonwoven fabric is made from at least a high elongation fiber
  • the lower sheet is made of an aggregate of thermoplastic resin fibers
  • the ridge has a hollow structure between the nonwoven fabric and the lower sheet
  • the non-woven fabric has a top region, a bottom region, and a side region located between the top region, the top portion of the protruding portion is formed from the top region, and the bottom portion of the recessed portion is formed from the bottom region. Formed, The absorbent article in which the fiber density in the side
  • ⁇ 2> The absorbent article according to ⁇ 1>, wherein the uneven structure has at least a central region in a width direction of the absorbent article.
  • ⁇ 3> The absorptivity according to ⁇ 1> or ⁇ 2>, wherein the convex portion can maintain the hollow structure in a state where a load of 4 g / cm 2 is applied to the absorbent article from the surface sheet side. Goods.
  • ⁇ 4> The absorbent article according to any one of ⁇ 1> to ⁇ 3>, wherein the surface sheet and the lower sheet are joined intermittently along a direction in which the protruding portion extends.
  • the width of the absorbent body is narrower than both the width of the top sheet and the width of the lower sheet, At least in the central region in the longitudinal direction of the absorbent article, the absorbent body has a linear shape on each side edge, and is substantially parallel to the extending direction of the ridges and the ridges ⁇ 1>.
  • the absorbent article has a shape in which each side edge is combined with a curve, In the absorbent article, each side edge is curved convexly outward in the width direction in the front region and the rear region in the longitudinal direction, and each side edge is inward in the width direction in the central region in the longitudinal direction.
  • the absorbent article according to any one of ⁇ 1> to ⁇ 4>, wherein the absorbent article is curved in a convex shape toward the center, whereby the width in the central region in the longitudinal direction is the narrowest.
  • ⁇ 7> The top sheet and the back sheet are joined at the periphery of the absorbent article,
  • the convex portion can maintain the hollow structure in a state where a load of 20 g / cm 2 is applied to the absorbent article from the surface sheet side.
  • ⁇ 9> The absorbent article according to any one of ⁇ 1> to ⁇ 8>, wherein the absorbent body includes an absorbent sheet including a fiber material and a water-absorbing polymer.
  • the thickness of the absorber is preferably 0.1 mm or more, more preferably 0.5 mm or more, preferably 5 mm or less, more preferably 2 mm or less, and preferably 0.1 mm or more and 5 mm or less.
  • ⁇ 12> The lower sheet, an apparent density of 0.005 g / cm 3 or more 0.5 g / cm 3 or less, said to ⁇ 1> not particularly made of 0.01 g / cm 3 or more 0.1 g / cm 3 or less is bulky nonwoven
  • ⁇ 13> The absorbent article according to any one of ⁇ 1> to ⁇ 12>, wherein the nonwoven fabric includes fibers having a large diameter portion and a small diameter portion having different fiber diameters.
  • ⁇ 14> The absorbent article according to any one of ⁇ 1> to ⁇ 13>, wherein the nonwoven fabric includes a plurality of fused portions formed by heat-sealing intersections of constituent fibers.
  • the ratio (D 13c / D 13a , D 13c / D 13a ) of the fiber density D 13c in the side region to the fiber density D 13a in the top region or the fiber density D 13b in the bottom region is preferably 0.
  • Fiber density D 13a in the apex area is preferably 90 present / mm 2 or more 200 present / mm 2 or less, more preferably to the ⁇ 1> to is 100 / mm 2 or more 180 lines / mm 2 or less ⁇ 15 > Any one of>.
  • Fiber density D 13b at the bottom area is preferably 80 present / mm 2 or more 200 present / mm 2 or less, more preferably to the ⁇ 1> to be 180 lines / mm 2 or less 90 present / mm 2 or more ⁇ 16 > Any one of>.
  • Fiber density D 13c of the side region is preferably 30 present / mm 2 or more eighty / mm 2 or less, to further the ⁇ 1> to preferably 40 present / mm 2 or more 70 yarns / mm 2 or less ⁇ 17 > Any one of>.
  • the high elongation fiber has a fineness of preferably 1.0 dtex or more and 10.0 dtex or less, more preferably 2.0 dtex or more and 8.0 dtex or less at the raw material stage.
  • the ratio of the high elongation fiber in the nonwoven fabric is preferably 50% by mass or more and 100% by mass or less, and more preferably 80% by mass or more and 100% by mass or less.
  • the constituent fiber When attention is paid to one constituent fiber among the constituent fibers of the nonwoven fabric, the constituent fiber has a large fiber diameter sandwiched between two small diameter portions having a small fiber diameter between adjacent fused portions.
  • the large-diameter portion When focusing on one of the constituent fibers, the large-diameter portion is preferably provided with 1 or more and 5 or less, more preferably 1 or more and 3 or less between the adjacent fused portions.
  • the ratio (L 16 / L 17 ) of the fiber diameter (diameter L 16 ) of the small diameter portion 16 to the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 0.5 or more and 0.8 or less, more preferably 0.
  • the fiber diameter (diameter L 16 ) of the small diameter portion is preferably 5 ⁇ m or more and 28 ⁇ m or less, more preferably 6.5 ⁇ m or more and 20 ⁇ m or less, and particularly preferably 7.5 ⁇ m or more and 16 ⁇ m or less.
  • the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 10 ⁇ m or more and 35 ⁇ m or less, more preferably 13 ⁇ m or more and 25 ⁇ m or less, and particularly preferably 15 ⁇ m or more and 20 ⁇ m or less, any one of the above ⁇ 22> to ⁇ 26> Absorbent article as described in 1.
  • the change point from the small diameter part adjacent to the fusion part to the large diameter part is 1/3 of the interval T between the fusion parts adjacent to the fusion part.
  • the non-woven fabric includes fibers having a large diameter portion and a small diameter portion having different fiber diameters, In the constituent fibers constituting the top region, the number of fibers having a change point from the small diameter portion adjacent to the fusion portion to the large diameter portion in the constituent fibers constituting the side region is the nonwoven fabric. ⁇ 1> to ⁇ 28>, wherein the number of fibers having the change point and the number of fibers having the change point in the constituent fibers constituting the bottom region are formed.
  • Absorbent articles are formed.
  • the ratio (N 13c / N 13a , N 13c / N 13b ) of the number (N 13c ) of fibers having the above-mentioned change point in the constituent fibers constituting the fiber is preferably 2 or more and 20 or less, more preferably 5 or more and 20 or less.
  • the number (N 13a ) of fibers having the change point in the constituent fibers constituting the top region is preferably 1 or more and 15 or less, more preferably 5 or more and 15 or less. Absorbent article.
  • region is preferably 5 or more and 20 or less, More preferably, 10 or more and 20 or less.
  • Sheet thickness T S of the nonwoven fabric is preferably 0.5mm or more 7mm or less, and more preferably wherein the 1.0mm or 5mm or less to ⁇ 1> to absorbent article according to any one of ⁇ 33>.
  • the layer thickness T L1 of the top region of the nonwoven fabric is preferably 0.1 mm or more and 3.0 mm or less, and more preferably 0.2 mm or more and 2.0 mm or less.
  • the layer thickness T L2 of the bottom region of the nonwoven fabric is preferably 0.1 mm or more and 3.0 mm or less, and more preferably 0.2 mm or more and 2.0 mm or less. The absorbent article as described.
  • the layer thickness T L3 of the side region of the nonwoven fabric is preferably 0.1 mm or more and 3.0 mm or less, more preferably 0.2 mm or more and 2.0 mm or less.
  • the non-woven fabric has an X direction that is a direction in which the ridges and the ridges extend, and a Y direction that is perpendicular to the X direction.
  • a pitch between the top portions of the protruding portions adjacent to each other in the Y direction is preferably 1 mm or more and 15 mm or less, and more preferably 1.5 mm or more and 10 mm or less.
  • the height of the protruding portion is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less, the absorbent article according to any one of ⁇ 1> to ⁇ 38>.
  • the basis weight of the nonwoven fabric is preferably 15 g / m 2 or more 50 g / m 2 or less the average value of the entire, to 20 g / m 2 or more 40 g / m 2 or less and more preferably the ⁇ 1> to any one of ⁇ 39> 2.
  • the absorbent article according to 1. ⁇ 41> The ⁇ 1> to ⁇ 40> according to any one of ⁇ 1> to ⁇ 40>, wherein the lower sheet is a second sheet made of an aggregate of thermoplastic resin fibers disposed between the top sheet and the absorber. Absorbent article.
  • the lower sheet is made of an aggregate of fibers, and the fiber density of the aggregate of fibers is higher than the fiber density of the non-woven fabric constituting the top sheet, according to any one of ⁇ 1> to ⁇ 41>.
  • Absorbent articles are made of an aggregate of fibers, and the fiber density of the aggregate of fibers is higher than the fiber density of the non-woven fabric constituting the top sheet, according to any one of ⁇ 1> to ⁇ 41>.
  • ⁇ 43> The absorbent article according to ⁇ 42>, wherein the constituent fibers of the lower sheet are oriented in the longitudinal direction.
  • ⁇ 44> The absorbent article according to ⁇ 42> or ⁇ 43>, wherein the lower sheet is made of a long-fiber nonwoven fabric.
  • ⁇ 45> The absorbent article according to any one of ⁇ 42> to ⁇ 44>, wherein the lower sheet has a higher hydrophilicity than the top sheet.
  • the thickness of the absorber is preferably 1 mm or more, more preferably 2 mm or more, and preferably 15 mm or less, more preferably 10 mm or less, preferably 1 mm or more and 15 mm or less, more preferably 2 mm or more and 10 mm or less.
  • ⁇ 47> The absorbent article according to any one of ⁇ 42> to ⁇ 46>, wherein the nonwoven fabric includes fibers having a large diameter portion and a small diameter portion having different fiber diameters.
  • ⁇ 48> The absorbent article according to any one of ⁇ 42> to ⁇ 47>, wherein the nonwoven fabric includes a plurality of fusion portions formed by heat-sealing intersections between constituent fibers.
  • the constituent fibers of the nonwoven fabric include high elongation fibers.
  • the high elongation fiber is a core-sheath composite fiber having heat-fusibility.
  • ⁇ 51> Absorption according to the above ⁇ 49> or ⁇ 50>, wherein the fineness of the high elongation fiber is 1.0 dtex or more and 10.0 dtex or less, preferably 2.0 dtex or more and 8.0 dtex or less at the raw material stage. Sex goods. ⁇ 52> The absorption according to any one of ⁇ 49> to ⁇ 51>, wherein the proportion of the high elongation fiber in the nonwoven fabric is 50% by mass or more and 100% by mass or less, preferably 80% by mass or more and 100% by mass or less. Sex goods.
  • the constituent fiber of the non-woven fabric has a large-diameter portion with a large fiber diameter sandwiched between two small-diameter portions with a small fiber diameter between adjacent fused portions when focusing on one constituent fiber.
  • ⁇ 54> The absorbent article according to ⁇ 53>, wherein the one constituent fiber includes a plurality of large-diameter portions between adjacent fused portions.
  • the constituent fibers of the non-woven fabric are provided with one or more large diameter portions of not less than one, preferably not less than one and not more than three, between adjacent fused portions when paying attention to one constituent fiber 11.
  • the ratio (L 16 / L 17) of the fiber diameter (diameter L 16 ) of the small diameter portion to the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 0.5 or more and 0.8 or less, more preferably 0.
  • the ratio (L 16 / L 17 ) of the fiber diameter (diameter L 16 ) of the small diameter portion to the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 0.5 or more and 0.8 or less, more preferably 0.
  • the fiber diameter (diameter L 16 ) of the small diameter portion is preferably 5 ⁇ m or more and 28 ⁇ m or less, more preferably 6.5 ⁇ m or more and 20 ⁇ m or less, and particularly preferably 7.5 ⁇ m or more and 16 ⁇ m or less, ⁇ 53> to ⁇ 57>
  • the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 10 ⁇ m or more and 35 ⁇ m or less, more preferably 13 ⁇ m or more and 25 ⁇ m or less, and particularly preferably 15 ⁇ m or more and 20 ⁇ m or less, any one of the above ⁇ 53> to ⁇ 58> 2.
  • the change point from the small diameter portion adjacent to the fusion portion to the large diameter portion is the interval T between the fusion portions adjacent to the fusion portion.
  • the non-woven fabric has a top region, a bottom region, and a side region located between these when viewed in cross-section along the thickness direction Z,
  • ⁇ 62> The absorbent article according to ⁇ 61>, wherein the fiber density of the side region is lower than the fiber density of the top region and the fiber density of the bottom region.
  • the ratio (D 13c / D 13a , D 13c / D 13a ) of the fiber density (D 13c ) in the side area to the fiber density (D 13a ) in the top area or the fiber density (D 13b ) in the bottom area ) Is preferably 0.15 or more and 0.9 or less, more preferably 0.2 or more and 0.8 or less, the absorbent article according to ⁇ 61> or ⁇ 62>.
  • Fiber density at the top region 13a is preferably 90 present / mm 2 or more 200 present / mm 2 or less, 180 lines / mm 2 or less and more preferably 100 / mm 2 or more, the ⁇ 61 > Absorptive article given in any 1 of ⁇ 63>.
  • Fiber density at the bottom area 13b (D 13b) is preferably 80 present / mm 2 or more 200 present / mm 2 or less, more preferably 90 present / mm 2 or more 180 lines / mm 2 or less, the ⁇ 61 The absorbent article according to any one of> to ⁇ 64>.
  • Fiber density of the side region 13c (D 13c) is preferably 30 lines / mm 2 or more eighty / mm 2 or less, more preferably 40 present / mm 2 or more 70 yarns / mm 2 or less, the ⁇ 61
  • the number of fibers having change points in the constituent fibers constituting the side region is the number of fibers having change points in the constituent fibers constituting the top region, and the change in the constituent fibers constituting the bottom region.
  • the side region is configured with respect to the number of fibers (N 13a ) having change points in the constituent fibers constituting the top region, or the number of fibers (N 13b ) having change points in the constituent fibers constituting the bottom region.
  • the ratio (N 13c / N 13a , N 13c / N 13b ) of the number (N 13c ) of fibers having change points in the constituent fibers is preferably 2 or more and 20 or less, more preferably 5 or more and 20 or less.
  • the absorbent article according to any one of 62> to ⁇ 67>. ⁇ 69> Regarding the specific value of the number of fibers having a change point of the nonwoven fabric, the number of fibers (N 13a ) having a change point in the constituent fibers constituting the top region is preferably 1 or more and 15 or less, more preferably The absorbent article according to any one of ⁇ 62> to ⁇ 68>, wherein is 5 or more and 15 or less.
  • the number of fibers (N 13b ) having the change point 18 in the constituent fibers constituting the bottom region is preferably 1 or more and 15 or less, and further The absorbent article according to any one of the above items ⁇ 62> to ⁇ 69>, preferably 5 or more and 15 or less.
  • the number of fibers (N 13c ) having the change point 18 in the constituent fibers constituting the side region is preferably 5 or more and 20 or less, More preferably, the absorbent article according to any one of the above ⁇ 62> to ⁇ 70>, wherein the number is 10 or more and 20 or less.
  • Sheet thickness T S of the nonwoven fabric is at 0.5mm or 7mm or less, preferably is less than 1.0mm 5mm or less, the absorbent article according to any one of the to ⁇ 42> to ⁇ 71>.
  • the layer thickness T L2 of the bottom region is 0.1 mm to 3.0 mm, preferably 0.2 mm to 2.0 mm. Goods.
  • ⁇ 75> The absorption according to any one of ⁇ 42> to ⁇ 74>, wherein the layer thickness T L3 of the side region is 0.1 mm to 3.0 mm, preferably 0.2 mm to 2.0 mm.
  • Absorbent article is 1 mm or more and 15 mm or less.
  • ⁇ 77> The absorbent article according to any one of the above ⁇ 42> to ⁇ 76>, wherein the height H of the ridge is 0.5 mm to 5 mm, preferably 1 mm to 3 mm.
  • the basis weight of the nonwoven fabric is a 15 g / m 2 or more 50 g / m 2 or less the average value of the entire sheet, preferably is 20 g / m 2 or more 40 g / m 2 or less, but more preferably, to the ⁇ 42> no
  • ⁇ 79> The absorbent article according to any one of ⁇ 42> to ⁇ 78>, wherein the lower sheet is a spunbond nonwoven fabric or a spunlace nonwoven fabric.
  • ⁇ 80> The ratio (D 13a / D 6 ) of the fiber density (D 6 ) of the lower sheet or the second sheet, which is the lower sheet, to the fiber density (D 13a ) of the top (top region 13a) of the ridge.
  • the absorbent body has a high density portion at a plurality of locations in the width direction where the fiber density is higher than the portions located on both sides in the width direction, and each of the high density portions overlaps with the top of the ridge portion.
  • the high-density portion extends in the longitudinal direction and is formed in a plurality of rows in the width direction, and each of the high-density portions continuously overlaps the top of the ridge portion along the longitudinal direction.
  • the number of high-density portions formed in the width direction Y of the absorbent body and overlapping the tops of the ridges of the topsheet is plural, preferably 3 or more, more preferably 5 or more, and still more preferably 8 More than a book.
  • ⁇ 84> The absorbent article according to any one of ⁇ 81> to ⁇ 83>, wherein the high-density portion has a length in the width direction Y of preferably 20 mm or more, more preferably 50 mm or more.
  • the high-density portion has a continuous length in the longitudinal direction X of preferably 30% or more, more preferably 50% or more, and still more preferably 100% with respect to the total length in the same direction of the absorber.
  • the length L3 of the high-density portion is preferably 5% or more, more preferably 30% or more of the total length L5 of the length L3 and the length between the high-density portions adjacent to each other in the longitudinal direction X.
  • the ratio (D 3 / D 4 ) of the density (D 4 ) of the low density part to the density (D 3 ) of the high density part is preferably 1.5 or more, more preferably 3 or more, ⁇ 81
  • the top sheet and the lower sheet include fibers of thermoplastic resin, and the concave portion is joined to the lower sheet by thermal fusion, and the top sheet and the lower sheet are joined at the joint.
  • ⁇ 92> The absorbent article according to any one of ⁇ 42> to ⁇ 91>, wherein a joint portion between the concave strip portion and the lower sheet is liquid-impermeable.
  • ⁇ 93> The absorbent article according to any one of ⁇ 42> to ⁇ 92>, wherein the joint portion is formed continuously in a longitudinal direction.
  • a liquid permeable top sheet that forms a skin contact surface, a back sheet and an absorbent article interposed between both sheets, and an absorbent article having a longitudinal direction and a width direction
  • the top sheet is composed of a nonwoven fabric having a concavo-convex structure in which strip-like ridges and recesses extending in the longitudinal direction are alternately arranged in the width direction, and is joined to the adjacent lower sheet in the recesses,
  • the protruding line portion has a hollow structure between the lower sheet,
  • the lower sheet comprises an aggregate of fibers, and the fiber density of the aggregate of fibers is higher than the fiber density of the nonwoven fabric constituting the top sheet.
  • ⁇ 96> The absorbent article according to ⁇ 94> or ⁇ 95>, wherein the lower sheet is made of a long-fiber nonwoven fabric.
  • ⁇ 97> The absorbent article according to any one of ⁇ 94> to ⁇ 96>, wherein the lower sheet has a higher hydrophilicity than the top sheet.
  • the thickness of the absorber is preferably 1 mm or more, more preferably 2 mm or more, and preferably 15 mm or less, more preferably 10 mm or less, preferably 1 mm or more and 15 mm or less, more preferably 2 mm or more and 10 mm or less.
  • ⁇ 99> The absorbent article according to any one of ⁇ 94> to ⁇ 98>, wherein the nonwoven fabric includes fibers having a large diameter portion and a small diameter portion having different fiber diameters.
  • the non-woven fabric includes a plurality of fusion parts formed by heat-sealing intersections of constituent fibers.
  • the constituent fibers of the nonwoven fabric include high elongation fibers.
  • the high elongation fiber is a core-sheath type composite fiber having heat-fusibility.
  • ⁇ 103> Absorption according to the above ⁇ 101> or ⁇ 102>, wherein the fineness of the high elongation fiber is 1.0 dtex or more and 10.0 dtex or less, preferably 2.0 dtex or more and 8.0 dtex or less at the raw material stage. Sex goods.
  • ⁇ 104> The absorption according to any one of ⁇ 101> to ⁇ 103>, wherein the ratio of the high elongation fiber in the nonwoven fabric is 50% by mass or more and 100% by mass or less, preferably 80% by mass or more and 100% by mass or less. Sex goods.
  • the constituent fiber of the non-woven fabric has a large-diameter portion with a large fiber diameter sandwiched between two small-diameter portions with a small fiber diameter between adjacent fused portions when focusing on one constituent fiber.
  • ⁇ 106> The absorbent article according to ⁇ 105>, wherein the one constituent fiber includes a plurality of large-diameter portions between adjacent fused portions.
  • the constituent fibers of the non-woven fabric are provided with one or more large diameter portions of not less than one, preferably not less than one and not more than three, between adjacent fused portions when paying attention to one constituent fiber 11.
  • the ratio (L 16 / L 17) of the fiber diameter (diameter L 16 ) of the small diameter portion to the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 0.5 or more and 0.8 or less, more preferably 0.
  • the ratio (L 16 / L 17 ) of the fiber diameter (diameter L 16 ) of the small diameter portion to the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 0.5 or more and 0.8 or less, more preferably 0.
  • the fiber diameter (diameter L 16 ) of the small diameter portion is preferably 5 ⁇ m to 28 ⁇ m, more preferably 6.5 ⁇ m to 20 ⁇ m, and particularly preferably 7.5 ⁇ m to 16 ⁇ m, ⁇ 105> to ⁇ 109>
  • the fiber diameter (diameter L 17 ) of the large diameter portion is preferably 10 ⁇ m or more and 35 ⁇ m or less, more preferably 13 ⁇ m or more and 25 ⁇ m or less, and particularly preferably 15 ⁇ m or more and 20 ⁇ m or less, any one of the above ⁇ 105> to ⁇ 110> 2.
  • the change point from the small diameter portion adjacent to the fusion portion to the large diameter portion is the interval T between the fusion portions adjacent to the fusion portion.
  • the non-woven fabric has a top region, a bottom region, and a side region located between these when viewed in cross-section along the thickness direction Z,
  • ⁇ 114> The absorbent article according to ⁇ 113>, wherein the fiber density of the side region is lower than the fiber density of the top region and the fiber density of the bottom region.
  • the ratio (D 13c / D 13a , D 13c / D 13a ) of the fiber density (D 13c ) in the side area to the fiber density (D 13a ) in the top area or the fiber density (D 13b ) in the bottom area ) Is preferably 0.15 or more and 0.9 or less, more preferably 0.2 or more and 0.8 or less, according to ⁇ 113> or ⁇ 114>.
  • Fiber density at the top region 13a (D 13a) is preferably 90 present / mm 2 or more 200 present / mm 2 or less, 180 lines / mm 2 or less and more preferably 100 / mm 2 or more, the ⁇ 113
  • Fiber density at the bottom area 13b is preferably 80 present / mm 2 or more 200 present / mm 2 or less, more preferably 90 present / mm 2 or more 180 lines / mm 2 or less, the ⁇ 113
  • Fiber density of the side region 13c (D 13c) is preferably 30 lines / mm 2 or more eighty / mm 2 or less, more preferably 40 present / mm 2 or more 70 yarns / mm 2 or less, the ⁇ 113 > Absorptive article given in any 1 of ⁇ 117>.
  • the number of fibers having change points in the constituent fibers constituting the side region is the number of fibers having change points in the constituent fibers constituting the top region, and the change in the constituent fibers constituting the bottom region.
  • the side region is configured with respect to the number of fibers (N 13a ) having change points in the constituent fibers constituting the top region, or the number of fibers (N 13b ) having change points in the constituent fibers constituting the bottom region.
  • the ratio (N 13c / N 13a , N 13c / N 13b ) of the number (N 13c ) of fibers having change points in the constituent fibers is preferably 2 or more and 20 or less, more preferably 5 or more and 20 or less.
  • the number of fibers (N 13a ) having a change point in the constituent fibers constituting the top region is preferably 1 or more and 15 or less, more preferably The absorbent article according to any one of ⁇ 114> to ⁇ 120>, wherein is 5 or more and 15 or less.
  • the number of fibers (N 13b ) having the change point 18 in the constituent fibers constituting the bottom region is preferably 1 or more and 15 or less, and further The absorbent article according to any one of ⁇ 114> to ⁇ 121>, preferably 5 or more and 15 or less.
  • the number of fibers (N 13c ) having the change point 18 in the constituent fibers constituting the side region is preferably 5 or more and 20 or less, The absorbent article according to any one of ⁇ 114> to ⁇ 122>, more preferably 10 or more and 20 or less.
  • Sheet thickness T S of the nonwoven fabric is at 0.5mm or 7mm or less, preferably is less than 1.0mm 5mm or less, the absorbent article according to any one of the to ⁇ 94> to ⁇ 123>.
  • ⁇ 126> The absorptivity according to any one of ⁇ 94> to ⁇ 125>, wherein the layer thickness T L2 of the bottom region is 0.1 mm to 3.0 mm, preferably 0.2 mm to 2.0 mm. Goods.
  • ⁇ 127> The absorption according to any one of ⁇ 94> to ⁇ 126>, wherein the layer thickness T L3 of the side region is 0.1 mm to 3.0 mm, preferably 0.2 mm to 2.0 mm.
  • Absorbent article is 1 mm or more and 15 mm or less.
  • ⁇ 129> The absorbent article according to any one of ⁇ 94> to ⁇ 128>, wherein the height H of the protruding portion is 0.5 mm to 5 mm, preferably 1 mm to 3 mm.
  • the basis weight of the non-woven fabric is 15 g / m 2 or more and 50 g / m 2 or less, preferably 20 g / m 2 or more and 40 g / m 2 or less, more preferably ⁇ 94> to The absorbent article according to any one of ⁇ 129>.
  • ⁇ 131> The absorbent article according to any one of ⁇ 94> to ⁇ 130>, wherein the lower sheet is a spunbond nonwoven fabric or a spunlace nonwoven fabric.
  • ⁇ 132> The ratio (D 13a / D 6 ) of the fiber density (D 6 ) of the lower sheet or the second sheet, which is the lower sheet, to the fiber density (D 13a ) of the top (top region 13a) of the ridge.
  • the absorbent article according to any one of ⁇ 94> to ⁇ 131>, preferably 1.1 or more, more preferably 2 or more.
  • the absorbent body has a high density portion at a plurality of locations in the width direction where the fiber density is higher than the portions located on both sides in the width direction, and each of the high density portions overlaps with the top of the ridge portion.
  • the absorbent article according to any one of ⁇ 94> to ⁇ 132>, wherein ⁇ 134> The high-density portion extends in the longitudinal direction and is formed in a plurality of rows in the width direction, and each of the high-density portions continuously overlaps the top of the ridge portion along the longitudinal direction.
  • ⁇ 135> The number of high-density portions formed in the width direction Y of the absorbent body and overlapping the tops of the ridges of the topsheet is plural, preferably 3 or more, more preferably 5 or more, and still more preferably 8 More than a book.
  • ⁇ 136> The absorbent article according to any one of ⁇ 133> to ⁇ 135>, wherein the high-density portion has a length in the width direction Y of preferably 20 mm or more, more preferably 50 mm or more.
  • ⁇ 137> The absorptivity according to any one of ⁇ 133> to ⁇ 136>, wherein as the high-density portion, a high-density portion having a shape long in the longitudinal direction X is continuously formed along the longitudinal direction X of the absorbent body. Goods. ⁇ 138>
  • the high-density portion has a continuous length in the longitudinal direction X of preferably 30% or more, more preferably 50% or more, and still more preferably 100% with respect to the total length in the same direction of the absorber.
  • ⁇ 139> The absorption according to any one of ⁇ 133> to ⁇ 138>, wherein the high-density portion has a shape that is long in the longitudinal direction X, and a plurality of the high-density portions are intermittently formed along the longitudinal direction X of the absorber 4. Sex goods.
  • ⁇ 140> The absorbent article according to any one of ⁇ 133> to ⁇ 139>, wherein a length L3 of the high-density portion in the longitudinal direction X is preferably 0.5 mm or more, more preferably 1 mm or more.
  • the length L3 of the high-density portion is preferably 5% or more, more preferably 30% or more of the total length L5 of the length L3 and the length between the high-density portions adjacent to each other in the longitudinal direction X.
  • ⁇ 142> The ratio (D 3 / D 4 ) of the density (D 4 ) of the low density part to the density (D 3 ) of the high density part is preferably 1.5 or more, more preferably 3 or more, ⁇ 133
  • the top sheet and the lower sheet include fibers of thermoplastic resin, and the concave portion is joined to the lower sheet by thermal fusion, and the top sheet and the lower sheet are joined at the joint.
  • ⁇ 144> The absorbent article according to any one of ⁇ 94> to ⁇ 143>, wherein a joint portion between the concave stripe portion and the lower sheet is liquid-impermeable.
  • ⁇ 145> The absorbent article according to any one of ⁇ 94> to ⁇ 144>, wherein the joint portion is formed continuously in a longitudinal direction.
  • an absorbent article in which the concave-convex structure of the top sheet easily follows the wearer's movement, has good air permeability on the skin facing surface side, and does not easily cause stuffiness when worn.
  • the absorbent article of the present invention it is possible to reliably suppress discomfort caused by the excretion fluid coming into contact with the wearer's skin and to effectively utilize the absorption capacity of the absorber.

Abstract

L'invention concerne un produit absorbant comprenant une feuille de surface avant (2), qui comprend un tissu non tissé (1) ayant une structure ondulée composée de crêtes (13) et de sillons (14) s'étendant dans la direction longitudinale et disposés alternativement dans la direction latérale Y. La feuille de surface avant (2) a été collée à une feuille inférieure adjacente (6) au niveau des sillons (14). Le tissu non tissé (1) a été formé à partir de fibres ayant au moins une faible extensibilité, servant de matière première. La feuille inférieure (6) comprend une masse de fibres de résine thermoplastique. Les crêtes (13) ont une structure creuse. Dans les crêtes (13), des zones latérales (14c) ont une densité des fibres inférieure à celle tant des zones supérieures (13a) que des zones inférieure (13b).
PCT/JP2015/079226 2014-10-17 2015-10-15 Produit absorbant WO2016060212A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580056416.8A CN107072831B (zh) 2014-10-17 2015-10-15 吸收性物品

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2014-212403 2014-10-17
JP2014212404A JP6440449B2 (ja) 2014-10-17 2014-10-17 吸収性物品
JP2014212403 2014-10-17
JP2014-212404 2014-10-17
JP2015195805A JP6080323B2 (ja) 2014-10-17 2015-10-01 吸収性物品
JP2015-195805 2015-10-01

Publications (1)

Publication Number Publication Date
WO2016060212A1 true WO2016060212A1 (fr) 2016-04-21

Family

ID=55746752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/079226 WO2016060212A1 (fr) 2014-10-17 2015-10-15 Produit absorbant

Country Status (1)

Country Link
WO (1) WO2016060212A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136616U (ja) * 1984-08-06 1986-03-06 花王株式会社 吸収性物品
JPH09562A (ja) * 1995-06-16 1997-01-07 New Oji Paper Co Ltd 吸収性物品
JP2002165830A (ja) * 2000-09-22 2002-06-11 Kao Corp 吸収性物品用の表面シート
JP2004174234A (ja) * 2002-11-13 2004-06-24 Kao Corp 吸収性物品用の表面シート
JP2004201939A (ja) * 2002-12-25 2004-07-22 Daio Paper Corp 吸収性物品
JP2013244256A (ja) * 2012-05-28 2013-12-09 Daio Paper Corp 吸収性物品及びその製造方法
WO2014054649A1 (fr) * 2012-10-03 2014-04-10 ユニ・チャーム株式会社 Article absorbant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136616U (ja) * 1984-08-06 1986-03-06 花王株式会社 吸収性物品
JPH09562A (ja) * 1995-06-16 1997-01-07 New Oji Paper Co Ltd 吸収性物品
JP2002165830A (ja) * 2000-09-22 2002-06-11 Kao Corp 吸収性物品用の表面シート
JP2004174234A (ja) * 2002-11-13 2004-06-24 Kao Corp 吸収性物品用の表面シート
JP2004201939A (ja) * 2002-12-25 2004-07-22 Daio Paper Corp 吸収性物品
JP2013244256A (ja) * 2012-05-28 2013-12-09 Daio Paper Corp 吸収性物品及びその製造方法
WO2014054649A1 (fr) * 2012-10-03 2014-04-10 ユニ・チャーム株式会社 Article absorbant

Similar Documents

Publication Publication Date Title
JP6108417B2 (ja) 吸収性物品
JP5411663B2 (ja) 吸収性物品
JP5268662B2 (ja) 吸収性物品の表面シート
JP6396753B2 (ja) 吸収性物品
JP2017074281A (ja) 吸収性物品
JP5449056B2 (ja) 吸収性物品の表面シート
TWI683655B (zh) 吸收性物品
JP6231868B2 (ja) 吸収性物品の表面シート及びそれを備えた吸収性物品
JP4712533B2 (ja) 吸収性物品
JP6431398B2 (ja) 吸収性物品
JP6275364B1 (ja) 吸収性物品
JP6440449B2 (ja) 吸収性物品
JP6080323B2 (ja) 吸収性物品
JP6704236B2 (ja) 吸収性物品
JP6932887B2 (ja) 軽失禁用吸収性物品
JP6580435B2 (ja) 吸収性物品
JP6467242B2 (ja) 吸収性物品
JP6440482B2 (ja) 吸収性物品
WO2016060212A1 (fr) Produit absorbant
JP7057626B2 (ja) 吸収性物品
JP6580420B2 (ja) 吸収性物品
JP6630085B2 (ja) 吸収性物品
JP6431397B2 (ja) 吸収性物品
JP2021003382A (ja) 吸収性物品
WO2016060219A1 (fr) Article absorbant

Legal Events

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

Ref document number: 15851068

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15851068

Country of ref document: EP

Kind code of ref document: A1